- tor-announce - lists.torproject.org

Tor Browser 9.5 is released
by Georg Koppen 02 Jun '20

02 Jun '20

Hello! Tor Browser 9.5 is now available from the Tor Browser download page [1] and also from our distribution directory [2]. Version 9.5 is a new major stable upgrade. 1: https://www.torproject.org/download/ 2: https://www.torproject.org/dist/torbrowser/9.5/ This new Tor Browser release is focused on helping users understand and use onion services. This release updates Firefox to 68.9.0esr, NoScript to 11.0.26, and Tor to version 0.4.3.5. Also, this release features important security updates [3] to Firefox. 3: https://www.mozilla.org/en-US/security/advisories/mfsa2020-21/ Please see the blog post [4] for more details about this version. 4: https://blog.torproject.org/new-release-tor-browser-95 The full changelog since Tor Browser 9.0.10 is: * All Platforms * Update Firefox to 68.9.0esr * Update HTTPS-Everywhere to 2020.5.20 * Update NoScript to 11.0.26 * Update Tor to 0.4.3.5 * Translations update * Bug 21549: Disable wasm for now until it is properly audited * Bug 27268: Preferences clean-up in Torbutton code * Bug 28745: Remove torbutton.js unused code * Bug 28746: Remove torbutton isolation and fp prefs sync * Bug 30237: Control port module improvements for v3 client authentication * Bug 30786: Add th locale * Bug 30787: Add lt locale * Bug 30788: Add ms locale * Bug 30851: Move default preferences to 000-tor-browser.js * Bug 30888: move torbutton_util.js to modules/utils.js * Bug 31134: Govern graphite again by security settings * Bug 31395: Remove inline script in aboutTor.xhtml * Bug 31499: Update libevent to 2.1.11-stable * Bug 33877: Disable Samples and Regression tests For Libevent Build * Bug 31573: Catch SessionStore.jsm exception * Bug 32318: Backport Mozilla's fix for bug 1534339 * Bug 32414: Make Services.search.addEngine obey FPI * Bug 32493: Disable MOZ_SERVICES_HEALTHREPORT * Bug 32618: Backport fixes from Mozilla bugs 1467970 and 1590526 * Bug 33342: Avoid disconnect search addon error after removal * Bug 33726: Fix patch for #23247: Communicating security expectations for .onion * Bug 34157: Backport fix for Mozilla Bug 1511941 * Windows + OS X + Linux * Update Tor Launcher to 0.2.21.8 * Translations update * Bug 19757: Support on-disk storage of v3 client auth keys * Bug 30237: Add v3 onion services client authentication prompt * Bug 30786: Add th locale * Bug 30787: Add lt locale * Bug 30788: Add ms locale * Bug 33514: non-en-US Tor Browser 9.5a6 won't start up * Bug 19251: Show improved error pages for onion service errors * Bug 19757: Support on-disk storage of v3 client auth keys * Bug 21952: Implement Onion-Location * Bug 27604: Fix broken Tor Browser after moving it to a different directory * Bug 28005: Implement .onion alias urlbar rewrites * Bug 30237: Improve TBB UI of hidden service client authorization * Bug 32076: Upgrade to goptlib v1.1.0 * Bug 32220: Improve the letterboxing experience * Bug 32418: Allow updates to be disabled via an enterprise policy. * Bug 32470: Backport fix for bug 1590538 * Bug 32645: Update URL bar onion indicators * Bug 32658: Create a new MAR signing key * Bug 32674: Point the about:tor "Get involved" link to the community portal * Bug 32767: Remove Disconnect search * Bug 33698: Update "About Tor Browser" links in Tor Browser * Bug 33707: Swap out onion icon in circuit display with new one * Bug 34032: Use Securedrop's Official https-everywhere ruleset * Bug 34196: Update site info URL with the onion name * Bug 34321: Add Learn More onboarding item * Windows * Bug 22919: Improve the random number generator for the boundaries in multipart/form-data * Bug 29614: Use SHA-256 algorithm for Windows timestamping * Bug 33113: Bump NSIS version to 3.05 * OS X * Bug 32505: Tighten our rules in our entitlements file for macOS * Linux * Bug 34315: Avoid reading policies from /etc/firefox on Linux * Android * Bug 26529: Notify user about possible proxy-bypass before opening external app * Bug 30767: Custom obfs4 bridge does not work on Tor Browser for Android * Bug 32303: Obfs4 is broken on Android Q * Bug 33359: Use latest Version of TOPL and Remove Patches * Bug 33931: obfs4 bridges are used instead of meek if meek is selected in Tor Browser for Android alpha * Build System * All Platforms * Go to 1.13.11 * Bug 33380: Add *.json to sha256sums-unsigned-build.txt * Windows * Bug 33802: --enable-secure-api is not supported anymore in mingw-w64 * Linux * Bug 32976: Build and bundle geckodriver * Bug 34242: Fix creation of Linux containers * Android * Bug 28765: LibEvent Build for Android * Bug 28766: Tor Build for Android * Bug 28803: Integrate building Pluggable Transports for Android * Bug 30461: Clean up tor-android-service project * Bug 32993: Package Tor With Tor Android Service Project * Bug 33685: Add Support for Building zlib for Android Georg

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Tor 0.4.3.5 is released
by Nick Mathewson 15 May '20

15 May '20

Hello, everyone! (If you are about to reply saying "please take me off this list", instead please follow these instructions: https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-announce/ . If you have trouble, it is probably because you subscribed using a different address than the one you are trying to unsubscribe with. You will have to enter the actual email address you used when you subscribed.) After months of work, Tor 0.4.3.5 is now available! This is the first stable release in the 0.4.3.x series, and we hope you find it useful. You can download the source code from the download page on the website. Packages, including a new Tor Browser, should be available within the next several weeks. Changes in version 0.4.3.5 - 2020-05-15 Tor 0.4.3.5 is the first stable release in the 0.4.3.x series. This series adds support for building without relay code enabled, and implements functionality needed for OnionBalance with v3 onion services. It includes significant refactoring of our configuration and controller functionality, and fixes numerous smaller bugs and performance issues. Per our support policy, we support each stable release series for nine months after its first stable release, or three months after the first stable release of the next series: whichever is longer. This means that 0.4.3.x will be supported until around February 2021--later, if 0.4.4.x is later than anticipated. Note also that support for 0.4.1.x is about to end on May 20 of this year; 0.4.2.x will be supported until September 15. We still plan to continue supporting 0.3.5.x, our long-term stable series, until Feb 2022. Below are the changes since 0.4.2.6. For a list of only the changes since 0.4.3.4-rc, see the ChangeLog file. o New system requirements: - When building Tor, you now need to have Python 3 in order to run the integration tests. (Python 2 is officially unsupported upstream, as of 1 Jan 2020.) Closes ticket 32608. o Major features (build system): - The relay code can now be disabled using the --disable-module-relay configure option. When this option is set, we also disable the dirauth module. Closes ticket 32123. - When Tor is compiled --disable-module-relay, we also omit the code used to act as a directory cache. Closes ticket 32487. o Major features (directory authority, ed25519): - Add support for banning a relay's ed25519 keys in the approved- routers file. This will help us migrate away from RSA keys in the future. Previously, only RSA keys could be banned in approved- routers. Resolves ticket 22029. Patch by Neel Chauhan. o Major features (onion services): - New control port commands to manage client-side onion service authorization credentials. The ONION_CLIENT_AUTH_ADD command adds a credential, ONION_CLIENT_AUTH_REMOVE deletes a credential, and ONION_CLIENT_AUTH_VIEW lists the credentials. Closes ticket 30381. - Introduce a new SocksPort flag, ExtendedErrors, to support more detailed error codes in information for applications that support them. Closes ticket 30382; implements proposal 304. o Major features (proxy): - In addition to its current supported proxy types (HTTP CONNECT, SOCKS4, and SOCKS5), Tor can now make its OR connections through a HAProxy server. A new torrc option was added to specify the address/port of the server: TCPProxy <protocol> <host>:<port>. Currently the only supported protocol for the option is haproxy. Closes ticket 31518. Patch done by Suphanat Chunhapanya (haxxpop). o Major bugfixes (security, denial-of-service): - Fix a denial-of-service bug that could be used by anyone to consume a bunch of CPU on any Tor relay or authority, or by directories to consume a bunch of CPU on clients or hidden services. Because of the potential for CPU consumption to introduce observable timing patterns, we are treating this as a high-severity security issue. Fixes bug 33119; bugfix on 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue as TROVE-2020-002 and CVE-2020-10592. o Major bugfixes (circuit padding, memory leak): - Avoid a remotely triggered memory leak in the case that a circuit padding machine is somehow negotiated twice on the same circuit. Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls. This is also tracked as TROVE-2020-004 and CVE-2020-10593. o Major bugfixes (directory authority): - Directory authorities will now send a 503 (not enough bandwidth) code to clients when under bandwidth pressure. Known relays and other authorities will always be answered regardless of the bandwidth situation. Fixes bug 33029; bugfix on 0.1.2.5-alpha. o Major bugfixes (DoS defenses, bridges, pluggable transport): - Fix a bug that was preventing DoS defenses from running on bridges with a pluggable transport. Previously, the DoS subsystem was not given the transport name of the client connection, thus failed to find the GeoIP cache entry for that client address. Fixes bug 33491; bugfix on 0.3.3.2-alpha. o Major bugfixes (networking): - Correctly handle IPv6 addresses in SOCKS5 RESOLVE_PTR requests, and accept strings as well as binary addresses. Fixes bug 32315; bugfix on 0.3.5.1-alpha. o Major bugfixes (onion service): - Report HS circuit failure back into the HS subsystem so we take appropriate action with regards to the client introduction point failure cache. This improves reachability of onion services, since now clients notice failing introduction circuits properly. Fixes bug 32020; bugfix on 0.3.2.1-alpha. o Minor feature (heartbeat, onion service): - Add the DoS INTRODUCE2 defenses counter to the heartbeat DoS message. Closes ticket 31371. o Minor feature (sendme, flow control): - Default to sending SENDME version 1 cells. (Clients are already sending these, because of a consensus parameter telling them to do so: this change only affects what clients would do if the consensus didn't contain a recommendation.) Closes ticket 33623. o Minor features (best practices tracker): - Practracker now supports a --regen-overbroad option to regenerate the exceptions file, but only to revise exceptions to be _less_ tolerant of best-practices violations. Closes ticket 32372. o Minor features (configuration validation): - Configuration validation can now be done by per-module callbacks, rather than a global validation function. This will let us reduce the size of config.c and some of its more cumbersome functions. Closes ticket 31241. o Minor features (configuration): - If a configured hardware crypto accelerator in AccelName is prefixed with "!", Tor now exits when it cannot be found. Closes ticket 32406. - We now use flag-driven logic to warn about obsolete configuration fields, so that we can include their names. In 0.4.2, we used a special type, which prevented us from generating good warnings. Implements ticket 32404. o Minor features (configure, build system): - Output a list of enabled/disabled features at the end of the configure process in a pleasing way. Closes ticket 31373. o Minor features (continuous integration): - Run Doxygen Makefile target on Travis, so we can learn about regressions in our internal documentation. Closes ticket 32455. - Stop allowing failures on the Travis CI stem tests job. It looks like all the stem hangs we were seeing before are now fixed. Closes ticket 33075. o Minor features (controller): - Add stream isolation data to STREAM event. Closes ticket 19859. - Implement a new GETINFO command to fetch microdescriptor consensus. Closes ticket 31684. o Minor features (debugging, directory system): - Don't crash when we find a non-guard with a guard-fraction value set. Instead, log a bug warning, in an attempt to figure out how this happened. Diagnostic for ticket 32868. o Minor features (defense in depth): - Add additional checks around tor_vasprintf() usage, in case the function returns an error. Patch by Tobias Stoeckmann. Fixes ticket 31147. o Minor features (developer tools): - Remove the 0.2.9.x series branches from git scripts (git-merge- forward.sh, git-pull-all.sh, git-push-all.sh, git-setup-dirs.sh). Closes ticket 32772. - Add a check_cocci_parse.sh script that checks that new code is parseable by Coccinelle. Add an exceptions file for unparseable files, and run the script from travis CI. Closes ticket 31919. - Call the check_cocci_parse.sh script from a 'check-cocci' Makefile target. Closes ticket 31919. - Add a rename_c_identifiers.py tool to rename a bunch of C identifiers at once, and generate a well-formed commit message describing the change. This should help with refactoring. Closes ticket 32237. - Add some scripts in "scripts/coccinelle" to invoke the Coccinelle semantic patching tool with the correct flags. These flags are fairly easy to forget, and these scripts should help us use Coccinelle more effectively in the future. Closes ticket 31705. o Minor features (diagnostic): - Improve assertions and add some memory-poisoning code to try to track down possible causes of a rare crash (32564) in the EWMA code. Closes ticket 33290. o Minor features (directory authorities): - Directory authorities now reject descriptors from relays running Tor versions from the 0.2.9 and 0.4.0 series. The 0.3.5 series is still allowed. Resolves ticket 32672. Patch by Neel Chauhan. o Minor features (Doxygen): - Update Doxygen configuration file to a more recent template (from 1.8.15). Closes ticket 32110. - "make doxygen" now works with out-of-tree builds. Closes ticket 32113. - Make sure that doxygen outputs documentation for all of our C files. Previously, some were missing @file declarations, causing them to be ignored. Closes ticket 32307. - Our "make doxygen" target now respects --enable-fatal-warnings by default, and does not warn about items that are missing documentation. To warn about missing documentation, run configure with the "--enable-missing-doc-warnings" flag: doing so suspends fatal warnings for doxygen. Closes ticket 32385. o Minor features (git scripts): - Add TOR_EXTRA_CLONE_ARGS to git-setup-dirs.sh for git clone customisation. Closes ticket 32347. - Add git-setup-dirs.sh, which sets up an upstream git repository and worktrees for tor maintainers. Closes ticket 29603. - Add TOR_EXTRA_REMOTE_* to git-setup-dirs.sh for a custom extra remote. Closes ticket 32347. - Call the check_cocci_parse.sh script from the git commit and push hooks. Closes ticket 31919. - Make git-push-all.sh skip unchanged branches when pushing to upstream. The script already skipped unchanged test branches. Closes ticket 32216. - Make git-setup-dirs.sh create a master symlink in the worktree directory. Closes ticket 32347. - Skip unmodified source files when doing some existing git hook checks. Related to ticket 31919. o Minor features (IPv6, client): - Make Tor clients tell dual-stack exits that they prefer IPv6 connections. This change is equivalent to setting the PreferIPv6 flag on SOCKSPorts (and most other listener ports). Tor Browser has been setting this flag for some time, and we want to remove a client distinguisher at exits. Closes ticket 32637. o Minor features (portability, android): - When building for Android, disable some tests that depend on $HOME and/or pwdb, which Android doesn't have. Closes ticket 32825. Patch from Hans-Christoph Steiner. o Minor features (relay modularity): - Split the relay and server pluggable transport config code into separate files in the relay module. Disable this code when the relay module is disabled. Closes part of ticket 32213. - When the relay module is disabled, reject attempts to set the ORPort, DirPort, DirCache, BridgeRelay, ExtORPort, or ServerTransport* options, rather than ignoring the values of these options. Closes part of ticket 32213. - When the relay module is disabled, change the default config so that DirCache is 0, and ClientOnly is 1. Closes ticket 32410. o Minor features (release tools): - Port our ChangeLog formatting and sorting tools to Python 3. Closes ticket 32704. o Minor features (testing): - The unit tests now support a "TOR_SKIP_TESTCASES" environment variable to specify a list of space-separated test cases that should not be executed. We will use this to disable certain tests that are failing on Appveyor because of mismatched OpenSSL libraries. Part of ticket 33643. - Detect some common failure cases for test_parseconf.sh in src/test/conf_failures. Closes ticket 32451. - Allow test_parseconf.sh to test expected log outputs for successful configs, as well as failed configs. Closes ticket 32451. - The test_parseconf.sh script now supports result variants for any combination of the optional libraries lzma, nss, and zstd. Closes ticket 32397. - When running the unit tests on Android, create temporary files in a subdirectory of /data/local/tmp. Closes ticket 32172. Based on a patch from Hans-Christoph Steiner. o Minor features (usability): - Include more information when failing to parse a configuration value. This should make it easier to tell what's going wrong when a configuration file doesn't parse. Closes ticket 33460. o Minor bugfix (relay, configuration): - Warn if the ContactInfo field is not set, and tell the relay operator that not having a ContactInfo field set might cause their relay to get rejected in the future. Fixes bug 33361; bugfix on 0.1.1.10-alpha. o Minor bugfixes (bridges): - Lowercase the configured value of BridgeDistribution before adding it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha. o Minor bugfixes (build system): - Fix "make autostyle" for out-of-tree builds. Fixes bug 32370; bugfix on 0.4.1.2-alpha. o Minor bugfixes (compiler compatibility): - Avoid compiler warnings from Clang 10 related to the use of GCC- style "/* falls through */" comments. Both Clang and GCC allow __attribute__((fallthrough)) instead, so that's what we're using now. Fixes bug 34078; bugfix on 0.3.1.3-alpha. - Fix compilation warnings with GCC 10.0.1. Fixes bug 34077; bugfix on 0.4.0.3-alpha. o Minor bugfixes (configuration handling): - Make control_event_conf_changed() take in a config_line_t instead of a smartlist of alternating key/value entries. Fixes bug 31531; bugfix on 0.2.3.3-alpha. Patch by Neel Chauhan. - Check for multiplication overflow when parsing memory units inside configuration. Fixes bug 30920; bugfix on 0.0.9rc1. - When dumping the configuration, stop adding a trailing space after the option name when there is no option value. This issue only affects options that accept an empty value or list. (Most options reject empty values, or delete the entire line from the dumped options.) Fixes bug 32352; bugfix on 0.0.9pre6. - Avoid changing the user's value of HardwareAccel as stored by SAVECONF, when AccelName is set but HardwareAccel is not. Fixes bug 32382; bugfix on 0.2.2.1-alpha. - When creating a KeyDirectory with the same location as the DataDirectory (not recommended), respect the DataDirectory's group-readable setting if one has not been set for the KeyDirectory. Fixes bug 27992; bugfix on 0.3.3.1-alpha. o Minor bugfixes (continuous integration): - Remove the buggy and unused mirroring job. Fixes bug 33213; bugfix on 0.3.2.2-alpha. o Minor bugfixes (controller protocol): - When receiving "ACTIVE" or "DORMANT" signals on the control port, report them as SIGNAL events. Previously we would log a bug warning. Fixes bug 33104; bugfix on 0.4.0.1-alpha. o Minor bugfixes (controller): - In routerstatus_has_changed(), check all the fields that are output over the control port. Fixes bug 20218; bugfix on 0.1.1.11-alpha. o Minor bugfixes (developer tools): - Allow paths starting with ./ in scripts/add_c_file.py. Fixes bug 31336; bugfix on 0.4.1.2-alpha. o Minor bugfixes (dirauth module): - Split the dirauth config code into a separate file in the dirauth module. Disable this code when the dirauth module is disabled. Closes ticket 32213. - When the dirauth module is disabled, reject attempts to set the AuthoritativeDir option, rather than ignoring the value of the option. Fixes bug 32213; bugfix on 0.3.4.1-alpha. o Minor bugfixes (embedded Tor): - When starting Tor any time after the first time in a process, register the thread in which it is running as the main thread. Previously, we only did this on Windows, which could lead to bugs like 23081 on non-Windows platforms. Fixes bug 32884; bugfix on 0.3.3.1-alpha. o Minor bugfixes (git scripts): - Avoid sleeping before the last push in git-push-all.sh. Closes ticket 32216. - Forward all unrecognised arguments in git-push-all.sh to git push. Closes ticket 32216. o Minor bugfixes (key portability): - When reading PEM-encoded key data, tolerate CRLF line-endings even if we are not running on Windows. Previously, non-Windows hosts would reject these line-endings in certain positions, making certain key files hard to move from one host to another. Fixes bug 33032; bugfix on 0.3.5.1-alpha. o Minor bugfixes (logging): - Stop truncating IPv6 addresses and ports in channel and connection logs. Fixes bug 33918; bugfix on 0.2.4.4-alpha. - Flush stderr, stdout, and file logs during shutdown, if supported by the OS. This change helps make sure that any final logs are recorded. Fixes bug 33087; bugfix on 0.4.1.6. - Stop closing stderr and stdout during shutdown. Closing these file descriptors can hide sanitiser logs. Fixes bug 33087; bugfix on 0.4.1.6. - If we encounter a bug when flushing a buffer to a TLS connection, only log the bug once per invocation of the Tor process. Previously we would log with every occurrence, which could cause us to run out of disk space. Fixes bug 33093; bugfix on 0.3.2.2-alpha. - When logging a bug, do not say "Future instances of this warning will be silenced" unless we are actually going to silence them. Previously we would say this whenever a BUG() check failed in the code. Fixes bug 33095; bugfix on 0.4.1.1-alpha. o Minor bugfixes (onion services v2): - Move a series of v2 onion service warnings to protocol-warning level because they can all be triggered remotely by a malformed request. Fixes bug 32706; bugfix on 0.1.1.14-alpha. - When sending the INTRO cell for a v2 Onion Service, look at the failure cache alongside timeout values to check if the intro point is marked as failed. Previously, we only looked at the relay timeout values. Fixes bug 25568; bugfix on 0.2.7.3-rc. Patch by Neel Chauhan. o Minor bugfixes (onion services v3): - Remove a BUG() warning that would cause a stack trace if an onion service descriptor was freed while we were waiting for a rendezvous circuit to complete. Fixes bug 28992; bugfix on 0.3.2.1-alpha. - Relax severity of a log message that can appear naturally when decoding onion service descriptors as a relay. Also add some diagnostics to debug any future bugs in that area. Fixes bug 31669; bugfix on 0.3.0.1-alpha. - Fix an assertion failure that could result from a corrupted ADD_ONION control port command. Found by Saibato. Fixes bug 33137; bugfix on 0.3.3.1-alpha. This issue is also tracked as TROVE-2020-003. - Properly handle the client rendezvous circuit timeout. Previously Tor would sometimes timeout a rendezvous circuit awaiting the introduction ACK, and find itself unable to re-establish all circuits because the rendezvous circuit timed out too early. Fixes bug 32021; bugfix on 0.3.2.1-alpha. o Minor bugfixes (onion services): - Do not rely on a "circuit established" flag for intro circuits but instead always query the HS circuit map. This is to avoid sync issue with that flag and the map. Fixes bug 32094; bugfix on 0.3.2.1-alpha. o Minor bugfixes (onion services, all): - In cancel_descriptor_fetches(), use connection_list_by_type_purpose() instead of connection_list_by_type_state(). Fixes bug 32639; bugfix on 0.3.2.1-alpha. Patch by Neel Chauhan. o Minor bugfixes (pluggable transports): - When receiving a message on standard error from a pluggable transport, log it at info level, rather than as a warning. Fixes bug 33005; bugfix on 0.4.0.1-alpha. o Minor bugfixes (rust, build): - Fix a syntax warning given by newer versions of Rust that was creating problems for our continuous integration. Fixes bug 33212; bugfix on 0.3.5.1-alpha. o Minor bugfixes (scripts): - Fix update_versions.py for out-of-tree builds. Fixes bug 32371; bugfix on 0.4.0.1-alpha. o Minor bugfixes (testing): - Use the same code to find the tor binary in all of our test scripts. This change makes sure we are always using the coverage binary when coverage is enabled. Fixes bug 32368; bugfix on 0.2.7.3-rc. - Stop ignoring "tor --dump-config" errors in test_parseconf.sh. Fixes bug 32468; bugfix on 0.4.2.1-alpha. - Our option-validation tests no longer depend on specially configured non-default, non-passing sets of options. Previously, the tests had been written to assume that options would _not_ be set to their defaults, which led to needless complexity and verbosity. Fixes bug 32175; bugfix on 0.2.8.1-alpha. o Minor bugfixes (TLS bug handling): - When encountering a bug in buf_read_from_tls(), return a "MISC" error code rather than "WANTWRITE". This change might help avoid some CPU-wasting loops if the bug is ever triggered. Bug reported by opara. Fixes bug 32673; bugfix on 0.3.0.4-alpha. o Deprecated features: - Deprecate the ClientAutoIPv6ORPort option. This option was not true "Happy Eyeballs", and often failed on connections that weren't reliably dual-stack. Closes ticket 32942. Patch by Neel Chauhan. o Documentation: - Provide a quickstart guide for a Circuit Padding Framework, and documentation for researchers to implement and study circuit padding machines. Closes ticket 28804. - Add documentation in 'HelpfulTools.md' to describe how to build a tag file. Closes ticket 32779. - Create a high-level description of the long-term software architecture goals. Closes ticket 32206. - Describe the --dump-config command in the manual page. Closes ticket 32467. - Unite coding advice from this_not_that.md in torguts repo into our coding standards document. Resolves ticket 31853. o Removed features: - Our Doxygen configuration no longer generates LaTeX output. The reference manual produced by doing this was over 4000 pages long, and generally unusable. Closes ticket 32099. - The option "TestingEstimatedDescriptorPropagationTime" is now marked as obsolete. It has had no effect since 0.3.0.7, when clients stopped rejecting consensuses "from the future". Closes ticket 32807. - We no longer support consensus methods before method 28; these methods were only used by authorities running versions of Tor that are now at end-of-life. In effect, this means that clients, relays, and authorities now assume that authorities will be running version 0.3.5.x or later. Closes ticket 32695. o Testing: - Avoid conflicts between the fake sockets in tor's unit tests, and real file descriptors. Resolves issues running unit tests with GitHub Actions, where the process that embeds or launches the tests has already opened a large number of file descriptors. Fixes bug 33782; bugfix on 0.2.8.1-alpha. Found and fixed by Putta Khunchalee. - Add more test cases for tor's UTF-8 validation function. Also, check the arguments passed to the function for consistency. Closes ticket 32845. - Improve test coverage for relay and dirauth config code, focusing on option validation and normalization. Closes ticket 32213. - Improve the consistency of test_parseconf.sh output, and run all the tests, even if one fails. Closes ticket 32213. - Run the practracker unit tests in the pre-commit git hook. Closes ticket 32609. o Code simplification and refactoring (channel): - Channel layer had a variable length cell handler that was not used and thus removed. Closes ticket 32892. o Code simplification and refactoring (configuration): - Immutability is now implemented as a flag on individual configuration options rather than as part of the option-transition checking code. Closes ticket 32344. - Instead of keeping a list of configuration options to check for relative paths, check all the options whose type is "FILENAME". Solves part of ticket 32339. - Our default log (which ordinarily sends NOTICE-level messages to standard output) is now handled in a more logical manner. Previously, we replaced the configured log options if they were empty. Now, we interpret an empty set of log options as meaning "use the default log". Closes ticket 31999. - Remove some unused arguments from the options_validate() function, to simplify our code and tests. Closes ticket 32187. - Simplify the options_validate() code so that it looks at the default options directly, rather than taking default options as an argument. This change lets us simplify its interface. Closes ticket 32185. - Use our new configuration architecture to move most authority- related options to the directory authority module. Closes ticket 32806. - When parsing the command line, handle options that determine our "quiet level" and our mode of operation (e.g., --dump-config and so on) all in one table. Closes ticket 32003. o Code simplification and refactoring (controller): - Create a new abstraction for formatting control protocol reply lines based on key-value pairs. Refactor some existing control protocol code to take advantage of this. Closes ticket 30984. - Create a helper function that can fetch network status or microdesc consensuses. Closes ticket 31684. o Code simplification and refactoring (dirauth modularization): - Remove the last remaining HAVE_MODULE_DIRAUTH inside a function. Closes ticket 32163. - Replace some confusing identifiers in process_descs.c. Closes ticket 29826. - Simplify some relay and dirauth config code. Closes ticket 32213. o Code simplification and refactoring (mainloop): - Simplify the ip_address_changed() function by removing redundant checks. Closes ticket 33091. o Code simplification and refactoring (misc): - Make all the structs we declare follow the same naming convention of ending with "_t". Closes ticket 32415. - Move and rename some configuration-related code for clarity. Closes ticket 32304. - Our include.am files are now broken up by subdirectory. Previously, src/core/include.am covered all of the subdirectories in "core", "feature", and "app". Closes ticket 32137. - Remove underused NS*() macros from test code: they make our tests more confusing, especially for code-formatting tools. Closes ticket 32887. o Code simplification and refactoring (relay modularization): - Disable relay_periodic when the relay module is disabled. Closes ticket 32244. - Disable relay_sys when the relay module is disabled. Closes ticket 32245. o Code simplification and refactoring (tool support): - Add numerous missing dependencies to our include files, so that they can be included in different reasonable orders and still compile. Addresses part of ticket 32764. - Fix some parts of our code that were difficult for Coccinelle to parse. Related to ticket 31705. - Fix some small issues in our code that prevented automatic formatting tools from working. Addresses part of ticket 32764. o Documentation (manpage): - Alphabetize the Server and Directory server sections of the tor manpage. Also split Statistics options into their own section of the manpage. Closes ticket 33188. Work by Swati Thacker as part of Google Season of Docs. - Document the __OwningControllerProcess torrc option and specify its polling interval. Resolves issue 32971. - Split "Circuit Timeout" options and "Node Selection" options into their own sections of the tor manpage. Closes tickets 32928 and 32929. Work by Swati Thacker as part of Google Season of Docs. - Alphabetize the Client Options section of the tor manpage. Closes ticket 32846. - Alphabetize the General Options section of the tor manpage. Closes ticket 32708. - In the tor(1) manpage, reword and improve formatting of the COMMAND-LINE OPTIONS and DESCRIPTION sections. Closes ticket 32277. Based on work by Swati Thacker as part of Google Season of Docs. - In the tor(1) manpage, reword and improve formatting of the FILES, SEE ALSO, and BUGS sections. Closes ticket 32176. Based on work by Swati Thacker as part of Google Season of Docs. o Testing (Appveyor CI): - In our Appveyor Windows CI, copy required DLLs to test and app directories, before running tor's tests. This ensures that tor.exe and test*.exe use the correct version of each DLL. This fix is not required, but we hope it will avoid DLL search issues in future. Fixes bug 33673; bugfix on 0.3.4.2-alpha. - On Appveyor, skip the crypto/openssl_version test, which is failing because of a mismatched library installation. Fix for 33643. o Testing (circuit, EWMA): - Add unit tests for circuitmux and EWMA subsystems. Closes ticket 32196. o Testing (Travis CI): - Remove a redundant distcheck job. Closes ticket 33194. - Sort the Travis jobs in order of speed: putting the slowest jobs first takes full advantage of Travis job concurrency. Closes ticket 33194. - Stop allowing the Chutney IPv6 Travis job to fail. This job was previously configured to fast_finish (which requires allow_failure), to speed up the build. Closes ticket 33195. - When a Travis chutney job fails, use chutney's new "diagnostics.sh" tool to produce detailed diagnostic output. Closes ticket 32792.

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Tor Browser 9.0.10 is released
by Georg Koppen 06 May '20

06 May '20

Hello! Tor Browser 9.0.10 is now available from the Tor Browser download page [1] and also from our distribution directory [2]. 1: https://www.torproject.org/download/ 2: https://www.torproject.org/dist/torbrowser/9.0.10/ This release updates Firefox to 68.8.0esr, NoScript to 11.0.25, and OpenSSL to 1.1.1g. Also, this release features important security updates [3] to Firefox. 3: https://www.mozilla.org/en-US/security/advisories/mfsa2020-17/ The full changelog since Tor Browser 9.0.9 is: * All Platforms * Update Firefox to 68.8.0esr * Bump NoScript to 11.0.25 * Windows + OS X + Linux * Bug 34017: Bump openssl version to 1.1.1g

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Tor Browser 9.0.9 is released
by Nicolas Vigier 10 Apr '20

10 Apr '20

Tor Browser 9.0.9 is now available from the Tor Browser download page [1] and also from our distribution directory [2]. 1: https://www.torproject.org/download/ 2: https://www.torproject.org/dist/torbrowser/9.0.9/ This release updates Firefox to 68.7.0esr, NoScript to 11.0.23, and OpenSSL to 1.1.1f. Also, this release features important security updates [3] to Firefox. 3: https://www.mozilla.org/en-US/security/advisories/mfsa2020-13/ The full changelog since Tor Browser 9.0.8 is: * All Platforms * Update Firefox to 68.7.0esr * Bump NoScript to 11.0.23 * Bug 33630: Remove noisebridge01 default bridge * Windows + OS X + Linux * Bug 33771: Update some existing licenses and add Libevent license * Bug 33723: Bump openssl version to 1.1.1f * Windows * Bug 33805: Remove escape-openssldir.patch

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New stable Tor releases: 0.3.5.10, 0.4.1.9, and 0.4.2.7
by Nick Mathewson 18 Mar '20

18 Mar '20

Hello! (If you are about to reply saying "please take me off this list", instead please follow these instructions: https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-announce/ . If you have trouble, it is probably because you subscribed using a different address than the one you are trying to unsubscribe with. You will have to enter the actual email address you used when you subscribed.) Source code for Tor 0.4.2.7 is now available; you can download the source code from the download place on the website. Packages should be available within the next several days, including a new Tor browser release. (For source code for 0.3.5.10 and 0.4.1.9 , see https://dist.torproject.org/ . There is also a new alpha release today, but those are announced on the tor-talk@ mailing list.) These releases fix a couple of denial-of-service vulnerabilities. Everybody running an older version should upgrade as packages become available. Below is the full changelog for 0.4.2.7. You can find the changelogs for the other releases at: 0.3.5.10: https://gitweb.torproject.org/tor.git/tree/ChangeLog?h=tor-0.3.5.10 0.4.1.9: https://gitweb.torproject.org/tor.git/tree/ChangeLog?h=tor-0.4.1.9 Changes in version 0.4.2.7 - 2020-03-18 This is the third stable release in the 0.4.2.x series. It backports numerous fixes from later releases, including a fix for TROVE-2020- 002, a major denial-of-service vulnerability that affected all released Tor instances since 0.2.1.5-alpha. Using this vulnerability, an attacker could cause Tor instances to consume a huge amount of CPU, disrupting their operations for several seconds or minutes. This attack could be launched by anybody against a relay, or by a directory cache against any client that had connected to it. The attacker could launch this attack as much as they wanted, thereby disrupting service or creating patterns that could aid in traffic analysis. This issue was found by OSS-Fuzz, and is also tracked as CVE-2020-10592. We do not have reason to believe that this attack is currently being exploited in the wild, but nonetheless we advise everyone to upgrade as soon as packages are available. o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha): - Fix a denial-of-service bug that could be used by anyone to consume a bunch of CPU on any Tor relay or authority, or by directories to consume a bunch of CPU on clients or hidden services. Because of the potential for CPU consumption to introduce observable timing patterns, we are treating this as a high-severity security issue. Fixes bug 33119; bugfix on 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue as TROVE-2020-002 and CVE-2020-10592. o Major bugfixes (circuit padding, memory leak, backport from 0.4.3.3-alpha): - Avoid a remotely triggered memory leak in the case that a circuit padding machine is somehow negotiated twice on the same circuit. Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls. This is also tracked as TROVE-2020-004 and CVE-2020-10593. o Major bugfixes (directory authority, backport from 0.4.3.3-alpha): - Directory authorities will now send a 503 (not enough bandwidth) code to clients when under bandwidth pressure. Known relays and other authorities will always be answered regardless of the bandwidth situation. Fixes bug 33029; bugfix on 0.1.2.5-alpha. o Minor features (continuous integration, backport from 0.4.3.2-alpha): - Stop allowing failures on the Travis CI stem tests job. It looks like all the stem hangs we were seeing before are now fixed. Closes ticket 33075. o Minor bugfixes (bridges, backport from 0.4.3.1-alpha): - Lowercase the configured value of BridgeDistribution before adding it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha. o Minor bugfixes (logging, backport from 0.4.3.2-alpha): - If we encounter a bug when flushing a buffer to a TLS connection, only log the bug once per invocation of the Tor process. Previously we would log with every occurrence, which could cause us to run out of disk space. Fixes bug 33093; bugfix on 0.3.2.2-alpha. o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha): - Fix an assertion failure that could result from a corrupted ADD_ONION control port command. Found by Saibato. Fixes bug 33137; bugfix on 0.3.3.1-alpha. This issue is also tracked as TROVE-2020-003. o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha): - Fix a syntax warning given by newer versions of Rust that was creating problems for our continuous integration. Fixes bug 33212; bugfix on 0.3.5.1-alpha. o Testing (Travis CI, backport from 0.4.3.3-alpha): - Remove a redundant distcheck job. Closes ticket 33194. - Sort the Travis jobs in order of speed: putting the slowest jobs first takes full advantage of Travis job concurrency. Closes ticket 33194. - Stop allowing the Chutney IPv6 Travis job to fail. This job was previously configured to fast_finish (which requires allow_failure), to speed up the build. Closes ticket 33195. - When a Travis chutney job fails, use chutney's new "diagnostics.sh" tool to produce detailed diagnostic output. Closes ticket 32792.

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New stable releases: Tor 0.4.1.8 and 0.4.2.6
by Nick Mathewson 30 Jan '20

30 Jan '20

Hello, everyone! (If you are about to reply saying "please take me off this list", instead please follow these instructions: https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-announce/ . If you have trouble, it is probably because you subscribed using a different address than the one you are trying to unsubscribe with. You will have to enter the actual email address you used when you subscribed.) Source code for Tor 0.4.2.6 is now available from the usual place at https://www.torproject.org/download/tor/ . Packages should be available within the next several weeks, with a new Tor Browser by mid-February. Source code for Tor 0.4.1.8 is available from our distribution site, at https://dist.torproject.org/ . Change logs for these releases are below. A reminder about supported releases: 0.2.9.x releases are no longer supported as of Jan 1, and 0.4.0.x releases will no longer be supported as of Feb 2. The currently supported stable series are 0.3.5.x, 0.4.1.x, and 0.4.2.x. For more information about our support policies, see https://trac.torproject.org/projects/tor/wiki/org/teams/NetworkTeam/CoreTor… Changes in version 0.4.2.6 - 2020-01-30 This is the second stable release in the 0.4.2.x series. It backports several bugfixes from 0.4.3.1-alpha, including some that had affected the Linux seccomp2 sandbox or Windows services. If you're running with one of those configurations, you'll probably want to upgrade; otherwise, you should be fine with 0.4.2.5. o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha): - Correct how we use libseccomp. Particularly, stop assuming that rules are applied in a particular order or that more rules are processed after the first match. Neither is the case! In libseccomp <2.4.0 this lead to some rules having no effect. libseccomp 2.4.0 changed how rules are generated, leading to a different ordering, which in turn led to a fatal crash during startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by Peter Gerber. - Fix crash when reloading logging configuration while the experimental sandbox is enabled. Fixes bug 32841; bugfix on 0.4.1.7. Patch by Peter Gerber. o Minor bugfixes (correctness checks, backport from 0.4.3.1-alpha): - Use GCC/Clang's printf-checking feature to make sure that tor_assertf() arguments are correctly typed. Fixes bug 32765; bugfix on 0.4.1.1-alpha. o Minor bugfixes (logging, crash, backport from 0.4.3.1-alpha): - Avoid a possible crash when trying to log a (fatal) assertion failure about mismatched magic numbers in configuration objects. Fixes bug 32771; bugfix on 0.4.2.1-alpha. o Minor bugfixes (testing, backport from 0.4.3.1-alpha): - When TOR_DISABLE_PRACTRACKER is set, do not apply it to the test_practracker.sh script. Doing so caused a test failure. Fixes bug 32705; bugfix on 0.4.2.1-alpha. - When TOR_DISABLE_PRACTRACKER is set, log a notice to stderr when skipping practracker checks. Fixes bug 32705; bugfix on 0.4.2.1-alpha. o Minor bugfixes (windows service, backport from 0.4.3.1-alpha): - Initialize the publish/subscribe system when running as a windows service. Fixes bug 32778; bugfix on 0.4.1.1-alpha. o Testing (backport from 0.4.3.1-alpha): - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on Ubuntu Bionic. Turning off the Sandbox is a work-around, until we fix the sandbox errors in 32722. Closes ticket 32240. - Re-enable the Travis CI macOS Chutney build, but don't let it prevent the Travis job from finishing. (The Travis macOS jobs are slow, so we don't want to have it delay the whole CI process.) Closes ticket 32629. o Testing (continuous integration, backport from 0.4.3.1-alpha): - Use zstd in our Travis Linux builds. Closes ticket 32242. Changes in version 0.4.1.8 - 2020-01-30 This release backports several bugfixes from later release series, including some that had affected the Linux seccomp2 sandbox or Windows services. If you're running with one of those configurations, you'll probably want to upgrade; otherwise, you should be fine with your current version of 0.4.1.x. o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha): - Correct how we use libseccomp. Particularly, stop assuming that rules are applied in a particular order or that more rules are processed after the first match. Neither is the case! In libseccomp <2.4.0 this lead to some rules having no effect. libseccomp 2.4.0 changed how rules are generated, leading to a different ordering, which in turn led to a fatal crash during startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by Peter Gerber. - Fix crash when reloading logging configuration while the experimental sandbox is enabled. Fixes bug 32841; bugfix on 0.4.1.7. Patch by Peter Gerber. o Minor bugfixes (crash, backport form 0.4.2.4-rc): - When running Tor with an option like --verify-config or --dump-config that does not start the event loop, avoid crashing if we try to exit early because of an error. Fixes bug 32407; bugfix on 0.3.3.1-alpha. o Minor bugfixes (windows service, backport from 0.4.3.1-alpha): - Initialize the publish/subscribe system when running as a windows service. Fixes bug 32778; bugfix on 0.4.1.1-alpha. o Testing (backport from 0.4.3.1-alpha): - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on Ubuntu Bionic. Turning off the Sandbox is a work-around, until we fix the sandbox errors in 32722. Closes ticket 32240. - Re-enable the Travis CI macOS Chutney build, but don't let it prevent the Travis job from finishing. (The Travis macOS jobs are slow, so we don't want to have it delay the whole CI process.) Closes ticket 32629. o Testing (continuous integration, backport from 0.4.3.1-alpha): - Use zstd in our Travis Linux builds. Closes ticket 32242.

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Tor Browser 9.0.4 is released
by Nicolas Vigier 10 Jan '20

10 Jan '20

Tor Browser 9.0.4 is now available from the Tor Browser download page [1] and also from our distribution directory [2]. 1: https://www.torproject.org/download/ 2: https://www.torproject.org/dist/torbrowser/9.0.4/ This release fixes a critical security issue in Firefox [3]: CVE-2019-17026. 3: https://www.mozilla.org/en-US/security/advisories/mfsa2020-03/ Note: There was no email sent on this list for version 9.0.3, which was released just before 9.0.4. You can find the announce for 9.0.3 on our blog [4]. 4: https://blog.torproject.org/new-release-tor-browser-903 The full changelog since Tor Browser 9.0.3 is: * All Platforms * Update Firefox to 68.4.1esr

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New stable releases: 0.4.1.7, 0.4.0.6, and 0.3.5.9
by Nick Mathewson 09 Dec '19

09 Dec '19

Hello, everyone! (If you are about to reply saying "please take me off this list", instead please follow these instructions: https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-announce/ . If you have trouble, it is probably because you subscribed using a different address than the one you are trying to unsubscribe with. You will have to enter the actual email address you used when you subscribed.) Along with 0.4.2.5, which also comes out today, we're releasing updates to several of our old series, including the LTS (long-term support) series 0.3.5.x. The new releases are 0.4.1.7, 0.4.0.6, and 0.3.5.9 . Source code is available at https://dist.torproject.org/ . Note that 0.2.9.x will no longer be supported as of January 1, 2020, and 0.4.0.x will no longer be supported after February 1, 2020. If you are running one of those versions, you should make a plan to upgrade. For more information on our supported release calendar, see https://trac.torproject.org/projects/tor/wiki/org/teams/NetworkTeam/CoreTor… . Changes in version 0.4.1.7 - 2019-12-09 This release backports several bugfixes to improve stability and correctness. Anyone experiencing build problems or crashes with 0.4.1.6, including all relays relying on AccountingMax, should upgrade. o Major features (directory authorities, backport from 0.4.2.2-alpha): - Directory authorities now reject relays running all currently deprecated release series. The currently supported release series are: 0.2.9, 0.3.5, 0.4.0, 0.4.1, and 0.4.2. Closes ticket 31549. o Major bugfixes (embedded Tor, backport from 0.4.2.2-alpha): - Avoid a possible crash when restarting Tor in embedded mode and enabling a different set of publish/subscribe messages. Fixes bug 31898; bugfix on 0.4.1.1-alpha. o Major bugfixes (relay, backport from 0.4.2.3-alpha): - Relays now respect their AccountingMax bandwidth again. When relays entered "soft" hibernation (which typically starts when we've hit 90% of our AccountingMax), we had stopped checking whether we should enter hard hibernation. Soft hibernation refuses new connections and new circuits, but the existing circuits can continue, meaning that relays could have exceeded their configured AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha. o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha): - Stop ignoring torrc options after an %include directive, when the included directory ends with a file that does not contain any config options (but does contain comments or whitespace). Fixes bug 31408; bugfix on 0.3.1.1-alpha. o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha): - Onion services now always use the exact number of intro points configured with the HiddenServiceNumIntroductionPoints option (or fewer if nodes are excluded). Before, a service could sometimes pick more intro points than configured. Fixes bug 31548; bugfix on 0.3.2.1-alpha. o Minor features (continuous integration, backport from 0.4.2.2-alpha): - When building on Appveyor and Travis, pass the "-k" flag to make, so that we are informed of all compilation failures, not just the first one or two. Closes ticket 31372. o Minor features (geoip, backport from 0.4.2.5): - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2 Country database. Closes ticket 32685. o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha): - Avoid spurious errors when Appveyor CI fails before the install step. Fixes bug 31884; bugfix on 0.3.4.2-alpha. o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc): - Fix a BUG() assertion that occurs within a very small race window between when a client intro circuit opens and when its descriptor gets cleaned up from the cache. The circuit is now closed early, which will trigger a re-fetch of the descriptor and continue the connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha. o Minor bugfixes (connections, backport from 0.4.2.3-rc): - Avoid trying to read data from closed connections, which can cause needless loops in Libevent and infinite loops in Shadow. Fixes bug 30344; bugfix on 0.1.1.1-alpha. o Minor bugfixes (error handling, backport from 0.4.2.1-alpha): - On abort, try harder to flush the output buffers of log messages. On some platforms (macOS), log messages could be discarded when the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha. - Report the tor version whenever an assertion fails. Previously, we only reported the Tor version on some crashes, and some non-fatal assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha. - When tor aborts due to an error, close log file descriptors before aborting. Closing the logs makes some OSes flush log file buffers, rather than deleting buffered log lines. Fixes bug 31594; bugfix on 0.2.5.2-alpha. o Minor bugfixes (logging, backport from 0.4.2.2-alpha): - Add a missing check for HAVE_PTHREAD_H, because the backtrace code uses mutexes. Fixes bug 31614; bugfix on 0.2.5.2-alpha. - Disable backtrace signal handlers when shutting down tor. Fixes bug 31614; bugfix on 0.2.5.2-alpha. - Rate-limit our the logging message about the obsolete .exit notation. Previously, there was no limit on this warning, which could potentially be triggered many times by a hostile website. Fixes bug 31466; bugfix on 0.2.2.1-alpha. o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha): - Do not log a nonfatal assertion failure when receiving a VERSIONS cell on a connection using the obsolete v1 link protocol. Log a protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha. o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha): - Reset the periodic events' "enabled" flag when Tor is shut down cleanly. Previously, this flag was left on, which caused periodic events not to be re-enabled when Tor was relaunched in-process with tor_api.h after a shutdown. Fixes bug 32058; bugfix on 0.3.3.1-alpha. o Minor bugfixes (multithreading, backport from 0.4.2.2-alpha): - Avoid some undefined behaviour when freeing mutexes. Fixes bug 31736; bugfix on 0.0.7. o Minor bugfixes (process management, backport from 0.4.2.3-alpha): - Remove overly strict assertions that triggered when a pluggable transport failed to launch. Fixes bug 31091; bugfix on 0.4.0.1-alpha. - Remove an assertion in the Unix process backend. This assertion would trigger when we failed to find the executable for a child process. Fixes bug 31810; bugfix on 0.4.0.1-alpha. o Minor bugfixes (relay, backport from 0.4.2.2-alpha): - Avoid crashing when starting with a corrupt keys directory where the old ntor key and the new ntor key are identical. Fixes bug 30916; bugfix on 0.2.4.8-alpha. o Minor bugfixes (testing, backport from 0.4.2.3-alpha): - When testing port rebinding, don't busy-wait for tor to log. Instead, actually sleep for a short time before polling again. Also improve the formatting of control commands and log messages. Fixes bug 31837; bugfix on 0.3.5.1-alpha. o Minor bugfixes (tests, SunOS, backport from 0.4.2.2-alpha): - Avoid a map_anon_nofork test failure due to a signed/unsigned integer comparison. Fixes bug 31897; bugfix on 0.4.1.1-alpha. o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha): - Log bugs about the TLS read buffer's length only once, rather than filling the logs with similar warnings. Fixes bug 31939; bugfix on 0.3.0.4-rc. o Documentation (backport from 0.4.2.2-alpha): - Explain why we can't destroy the backtrace buffer mutex. Explain why we don't need to destroy the log mutex. Closes ticket 31736. o Testing (continuous integration, backport from 0.4.2.3-alpha): - Disable all but one Travis CI macOS build, to mitigate slow scheduling of Travis macOS jobs. Closes ticket 32177. - Run the chutney IPv6 networks as part of Travis CI. Closes ticket 30860. - Simplify the Travis CI build matrix, and optimise for build time. Closes ticket 31859. - Use Windows Server 2019 instead of Windows Server 2016 in our Appveyor builds. Closes ticket 32086. o Testing (continuous integration, backport from 0.4.2.4-rc): - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241. - Use Ubuntu Bionic images for our Travis CI builds, so we can get a recent version of coccinelle. But leave chutney on Ubuntu Trusty, until we can fix some Bionic permissions issues (see ticket 32240). Related to ticket 31919. - Install the mingw OpenSSL package in Appveyor. This makes sure that the OpenSSL headers and libraries match in Tor's Appveyor builds. (This bug was triggered by an Appveyor image update.) Fixes bug 32449; bugfix on 0.3.5.6-rc. o Testing (continuous integration, backport from 0.4.2.5): - Require C99 standards-conforming code in Travis CI, but allow GNU gcc extensions. Also activates clang's -Wtypedef-redefinition warnings. Build some jobs with -std=gnu99, and some jobs without. Closes ticket 32500. Changes in version 0.4.0.6 - 2019-12-09 This is the second stable release in the 0.4.0.x series. This release backports several bugfixes to improve stability and correctness. Anyone experiencing build problems or crashes with 0.4.0.5, including all relays relying on AccountingMax, should upgrade. Note that, per our support policy, support for the 0.4.0.x series will end on 2 Feb 2020. Anyone still running 0.4.0.x should plan to upgrade to the latest stable release, or downgrade to 0.3.5.x, which will get long-term support until 1 Feb 2022. o Directory authority changes (backport from 0.4.1.5): - The directory authority "dizum" has a new IP address. Closes ticket 31406. o Major bugfixes (bridges, backport from 0.4.1.2-alpha): - Consider our directory information to have changed when our list of bridges changes. Previously, Tor would not re-compute the status of its directory information when bridges changed, and therefore would not realize that it was no longer able to build circuits. Fixes part of bug 29875. - Do not count previously configured working bridges towards our total of working bridges. Previously, when Tor's list of bridges changed, it would think that the old bridges were still usable, and delay fetching router descriptors for the new ones. Fixes part of bug 29875; bugfix on 0.3.0.1-alpha. o Major bugfixes (circuit build, guard, backport from 0.4.1.4-rc): - When considering upgrading circuits from "waiting for guard" to "open", always ignore circuits that are marked for close. Otherwise, we can end up in the situation where a subsystem is notified that a closing circuit has just opened, leading to undesirable behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha. o Major bugfixes (Onion service reachability, backport from 0.4.1.3-alpha): - Properly clean up the introduction point map when circuits change purpose from onion service circuits to pathbias, measurement, or other circuit types. This should fix some service-side instances of introduction point failure. Fixes bug 29034; bugfix on 0.3.2.1-alpha. o Major bugfixes (onion service v3, backport from 0.4.1.1-alpha): - Fix an unreachable bug in which an introduction point could try to send an INTRODUCE_ACK with a status code that Trunnel would refuse to encode, leading the relay to assert(). We've consolidated the ABI values into Trunnel now. Fixes bug 30454; bugfix on 0.3.0.1-alpha. - Clients can now handle unknown status codes from INTRODUCE_ACK cells. (The NACK behavior will stay the same.) This will allow us to extend status codes in the future without breaking the normal client behavior. Fixes another part of bug 30454; bugfix on 0.3.0.1-alpha. o Major bugfixes (relay, backport from 0.4.2.3-alpha): - Relays now respect their AccountingMax bandwidth again. When relays entered "soft" hibernation (which typically starts when we've hit 90% of our AccountingMax), we had stopped checking whether we should enter hard hibernation. Soft hibernation refuses new connections and new circuits, but the existing circuits can continue, meaning that relays could have exceeded their configured AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha. o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha): - Stop ignoring torrc options after an %include directive, when the included directory ends with a file that does not contain any config options (but does contain comments or whitespace). Fixes bug 31408; bugfix on 0.3.1.1-alpha. o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha): - Onion services now always use the exact number of intro points configured with the HiddenServiceNumIntroductionPoints option (or fewer if nodes are excluded). Before, a service could sometimes pick more intro points than configured. Fixes bug 31548; bugfix on 0.3.2.1-alpha. o Minor features (compile-time modules, backport from version 0.4.1.1-alpha): - Add a "--list-modules" command to print a list of which compile- time modules are enabled. Closes ticket 30452. o Minor features (continuous integration, backport from 0.4.1.1-alpha): - Remove sudo configuration lines from .travis.yml as they are no longer needed with current Travis build environment. Resolves issue 30213. o Minor features (continuous integration, backport from 0.4.1.4-rc): - Our Travis configuration now uses Chutney to run some network integration tests automatically. Closes ticket 29280. o Minor features (continuous integration, backport from 0.4.2.2-alpha): - When building on Appveyor and Travis, pass the "-k" flag to make, so that we are informed of all compilation failures, not just the first one or two. Closes ticket 31372. o Minor features (fallback directory list, backport from 0.4.1.4-rc): - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc in December 2018 (of which ~122 were still functional), with a list of 148 fallbacks (70 new, 78 existing, 79 removed) generated in June 2019. Closes ticket 28795. o Minor features (geoip, backport from 0.4.2.5): - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2 Country database. Closes ticket 32685. o Minor features (stem tests, backport from 0.4.2.1-alpha): - Change "make test-stem" so it only runs the stem tests that use tor. This change makes test-stem faster and more reliable. Closes ticket 31554. o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha): - Avoid spurious errors when Appveyor CI fails before the install step. Fixes bug 31884; bugfix on 0.3.4.2-alpha. o Minor bugfixes (build system, backport form 0.4.2.1-alpha): - Do not include the deprecated <sys/sysctl.h> on Linux or Windows systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha. o Minor bugfixes (circuit isolation, backport from 0.4.1.3-alpha): - Fix a logic error that prevented the SessionGroup sub-option from being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha. o Minor bugfixes (circuit padding, backport from 0.4.1.4-rc): - On relays, properly check that a padding machine is absent before logging a warning about it being absent. Fixes bug 30649; bugfix on 0.4.0.1-alpha. o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc): - Fix a BUG() assertion that occurs within a very small race window between when a client intro circuit opens and when its descriptor gets cleaned up from the cache. The circuit is now closed early, which will trigger a re-fetch of the descriptor and continue the connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha. o Minor bugfixes (clock skew detection, backport from 0.4.1.5): - Don't believe clock skew results from NETINFO cells that appear to arrive before we sent the VERSIONS cells they are responding to. Previously, we would accept them up to 3 minutes "in the past". Fixes bug 31343; bugfix on 0.2.4.4-alpha. o Minor bugfixes (compilation warning, backport from 0.4.1.5): - Fix a compilation warning on Windows about casting a function pointer for GetTickCount64(). Fixes bug 31374; bugfix on 0.2.9.1-alpha. o Minor bugfixes (compilation, backport from 0.4.1.5): - Avoid using labs() on time_t, which can cause compilation warnings on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha. o Minor bugfixes (compilation, backport from 0.4.2.1-alpha): - Suppress spurious float-conversion warnings from GCC when calling floating-point classifier functions on FreeBSD. Fixes part of bug 31687; bugfix on 0.3.1.5-alpha. o Minor bugfixes (compilation, unusual configurations, backport from 0.4.1.1-alpha): - Avoid failures when building with the ALL_BUGS_ARE_FATAL option due to missing declarations of abort(), and prevent other such failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha. o Minor bugfixes (configuration, proxies, backport from 0.4.1.2-alpha): - Fix a bug that prevented us from supporting SOCKS5 proxies that want authentication along with configured (but unused!) ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha. o Minor bugfixes (connections, backport from 0.4.2.3-rc): - Avoid trying to read data from closed connections, which can cause needless loops in Libevent and infinite loops in Shadow. Fixes bug 30344; bugfix on 0.1.1.1-alpha. o Minor bugfixes (continuous integration, backport from 0.4.1.3-alpha): - Allow the test-stem job to fail in Travis, because it sometimes hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha. - Skip test_rebind on macOS in Travis, because it is unreliable on macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha. - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha. o Minor bugfixes (crash on exit, backport from 0.4.1.4-rc): - Avoid a set of possible code paths that could try to use freed memory in routerlist_free() while Tor was exiting. Fixes bug 31003; bugfix on 0.1.2.2-alpha. o Minor bugfixes (directory authorities, backport from 0.4.1.3-alpha): - Stop crashing after parsing an unknown descriptor purpose annotation. We think this bug can only be triggered by modifying a local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha. o Minor bugfixes (directory authority, backport from 0.4.1.2-alpha): - Move the "bandwidth-file-headers" line in directory authority votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix on 0.3.5.1-alpha. o Minor bugfixes (error handling, backport from 0.4.2.1-alpha): - On abort, try harder to flush the output buffers of log messages. On some platforms (macOS), log messages could be discarded when the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha. - Report the tor version whenever an assertion fails. Previously, we only reported the Tor version on some crashes, and some non-fatal assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha. o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha): - When extracting an IPv6 address from a PF-based proxy, verify that we are actually configured to receive an IPv6 address, and log an internal error if not. Fixes part of bug 31687; bugfix on 0.2.3.4-alpha. o Minor bugfixes (guards, backport from 0.4.2.1-alpha): - When tor is missing descriptors for some primary entry guards, make the log message less alarming. It's normal for descriptors to expire, as long as tor fetches new ones soon after. Fixes bug 31657; bugfix on 0.3.3.1-alpha. o Minor bugfixes (logging, backport from 0.4.1.1-alpha): - Do not log a warning when running with an OpenSSL version other than the one Tor was compiled with, if the two versions should be compatible. Previously, we would warn whenever the version was different. Fixes bug 30190; bugfix on 0.2.4.2-alpha. o Minor bugfixes (logging, backport from 0.4.2.1-alpha): - Change log level of message "Hash of session info was not as expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix on 0.1.1.10-alpha. o Minor bugfixes (logging, backport from 0.4.2.2-alpha): - Rate-limit our the logging message about the obsolete .exit notation. Previously, there was no limit on this warning, which could potentially be triggered many times by a hostile website. Fixes bug 31466; bugfix on 0.2.2.1-alpha. o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha): - Do not log a nonfatal assertion failure when receiving a VERSIONS cell on a connection using the obsolete v1 link protocol. Log a protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha. o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha): - Reset the periodic events' "enabled" flag when Tor is shut down cleanly. Previously, this flag was left on, which caused periodic events not to be re-enabled when Tor was relaunched in-process with tor_api.h after a shutdown. Fixes bug 32058; bugfix on 0.3.3.1-alpha. o Minor bugfixes (memory leak, backport from 0.4.1.1-alpha): - Avoid a minor memory leak that could occur on relays when failing to create a "keys" directory. Fixes bug 30148; bugfix on 0.3.3.1-alpha. o Minor bugfixes (memory leak, backport from 0.4.1.4-rc): - Fix a trivial memory leak when parsing an invalid value from a download schedule in the configuration. Fixes bug 30894; bugfix on 0.3.4.1-alpha. o Minor bugfixes (NetBSD, backport from 0.4.1.2-alpha): - Fix usage of minherit() on NetBSD and other platforms that define MAP_INHERIT_{ZERO,NONE} instead of INHERIT_{ZERO,NONE}. Fixes bug 30614; bugfix on 0.4.0.2-alpha. Patch from Taylor Campbell. o Minor bugfixes (onion services, backport from 0.4.1.1-alpha): - Avoid a GCC 9.1.1 warning (and possible crash depending on libc implemenation) when failing to load an onion service client authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha. o Minor bugfixes (out-of-memory handler, backport from 0.4.1.2-alpha): - When purging the DNS cache because of an out-of-memory condition, try purging just the older entries at first. Previously, we would always purge the whole thing. Fixes bug 29617; bugfix on 0.3.5.1-alpha. o Minor bugfixes (portability, backport from 0.4.1.2-alpha): - Avoid crashing in our tor_vasprintf() implementation on systems that define neither vasprintf() nor _vscprintf(). (This bug has been here long enough that we question whether people are running Tor on such systems, but we're applying the fix out of caution.) Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by Tobias Stoeckmann. o Minor bugfixes (process management, backport from 0.4.2.3-alpha): - Remove overly strict assertions that triggered when a pluggable transport failed to launch. Fixes bug 31091; bugfix on 0.4.0.1-alpha. - Remove an assertion in the Unix process backend. This assertion would trigger when we failed to find the executable for a child process. Fixes bug 31810; bugfix on 0.4.0.1-alpha. o Minor bugfixes (relay, backport from 0.4.2.2-alpha): - Avoid crashing when starting with a corrupt keys directory where the old ntor key and the new ntor key are identical. Fixes bug 30916; bugfix on 0.2.4.8-alpha. o Minor bugfixes (rust, backport from 0.4.2.1-alpha): - Correctly exclude a redundant rust build job in Travis. Fixes bug 31463; bugfix on 0.3.5.4-alpha. o Minor bugfixes (testing, backport from 0.4.2.3-alpha): - When testing port rebinding, don't busy-wait for tor to log. Instead, actually sleep for a short time before polling again. Also improve the formatting of control commands and log messages. Fixes bug 31837; bugfix on 0.3.5.1-alpha. o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha): - Log bugs about the TLS read buffer's length only once, rather than filling the logs with similar warnings. Fixes bug 31939; bugfix on 0.3.0.4-rc. o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha): - Always retry v2 single onion service intro and rend circuits with a 3-hop path. Previously, v2 single onion services used a 3-hop path when rendezvous circuits were retried after a remote or delayed failure, but a 1-hop path for immediate retries. Fixes bug 23818; bugfix on 0.2.9.3-alpha. - Make v3 single onion services fall back to a 3-hop intro, when all intro points are unreachable via a 1-hop path. Previously, v3 single onion services failed when all intro nodes were unreachable via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha. o Documentation (backport from 0.4.2.1-alpha): - Use RFC 2397 data URL scheme to embed an image into tor-exit- notice.html so that operators no longer have to host it themselves. Closes ticket 31089. o Testing (backport from 0.4.1.2-alpha): - Specify torrc paths (with empty files) when launching tor in integration tests; refrain from reading user and system torrcs. Resolves issue 29702. o Testing (continuous integration, backport from 0.4.1.1-alpha): - In Travis, show stem's tor log after failure. Closes ticket 30234. o Testing (continuous integration, backport from 0.4.1.5): - In Travis, make stem log a controller trace to the console, and tail stem's tor log after failure. Closes ticket 30591. - In Travis, only run the stem tests that use a tor binary. Closes ticket 30694. o Testing (continuous integration, backport from 0.4.2.3-alpha): - Disable all but one Travis CI macOS build, to mitigate slow scheduling of Travis macOS jobs. Closes ticket 32177. - Run the chutney IPv6 networks as part of Travis CI. Closes ticket 30860. - Simplify the Travis CI build matrix, and optimise for build time. Closes ticket 31859. - Use Windows Server 2019 instead of Windows Server 2016 in our Appveyor builds. Closes ticket 32086. o Testing (continuous integration, backport from 0.4.2.4-rc): - Use Ubuntu Bionic images for our Travis CI builds, so we can get a recent version of coccinelle. But leave chutney on Ubuntu Trusty, until we can fix some Bionic permissions issues (see ticket 32240). Related to ticket 31919. - Install the mingw OpenSSL package in Appveyor. This makes sure that the OpenSSL headers and libraries match in Tor's Appveyor builds. (This bug was triggered by an Appveyor image update.) Fixes bug 32449; bugfix on 0.3.5.6-rc. - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241. o Testing (continuous integration, backport from 0.4.2.5): - Require C99 standards-conforming code in Travis CI, but allow GNU gcc extensions. Also activates clang's -Wtypedef-redefinition warnings. Build some jobs with -std=gnu99, and some jobs without. Closes ticket 32500. Changes in version 0.3.5.9 - 2019-12-09 Tor 0.3.5.9 backports serveral fixes from later releases, including several that affect bridge users, relay stability, onion services, and much more. o Directory authority changes (backport from 0.4.1.5): - The directory authority "dizum" has a new IP address. Closes ticket 31406. o Major bugfixes (bridges, backport from 0.4.1.2-alpha): - Consider our directory information to have changed when our list of bridges changes. Previously, Tor would not re-compute the status of its directory information when bridges changed, and therefore would not realize that it was no longer able to build circuits. Fixes part of bug 29875. - Do not count previously configured working bridges towards our total of working bridges. Previously, when Tor's list of bridges changed, it would think that the old bridges were still usable, and delay fetching router descriptors for the new ones. Fixes part of bug 29875; bugfix on 0.3.0.1-alpha. o Major bugfixes (circuit build, guard, backport from 0.4.1.4-rc): - When considering upgrading circuits from "waiting for guard" to "open", always ignore circuits that are marked for close. Otherwise, we can end up in the situation where a subsystem is notified that a closing circuit has just opened, leading to undesirable behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha. o Major bugfixes (NSS, relay, backport from 0.4.0.4-rc): - When running with NSS, disable TLS 1.2 ciphersuites that use SHA384 for their PRF. Due to an NSS bug, the TLS key exporters for these ciphersuites don't work -- which caused relays to fail to handshake with one another when these ciphersuites were enabled. Fixes bug 29241; bugfix on 0.3.5.1-alpha. o Major bugfixes (Onion service reachability, backport from 0.4.1.3-alpha): - Properly clean up the introduction point map when circuits change purpose from onion service circuits to pathbias, measurement, or other circuit types. This should fix some service-side instances of introduction point failure. Fixes bug 29034; bugfix on 0.3.2.1-alpha. o Major bugfixes (onion service v3, backport from 0.4.1.1-alpha): - Fix an unreachable bug in which an introduction point could try to send an INTRODUCE_ACK with a status code that Trunnel would refuse to encode, leading the relay to assert(). We've consolidated the ABI values into Trunnel now. Fixes bug 30454; bugfix on 0.3.0.1-alpha. - Clients can now handle unknown status codes from INTRODUCE_ACK cells. (The NACK behavior will stay the same.) This will allow us to extend status codes in the future without breaking the normal client behavior. Fixes another part of bug 30454; bugfix on 0.3.0.1-alpha. o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha): - Stop ignoring torrc options after an %include directive, when the included directory ends with a file that does not contain any config options (but does contain comments or whitespace). Fixes bug 31408; bugfix on 0.3.1.1-alpha. o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha): - Onion services now always use the exact number of intro points configured with the HiddenServiceNumIntroductionPoints option (or fewer if nodes are excluded). Before, a service could sometimes pick more intro points than configured. Fixes bug 31548; bugfix on 0.3.2.1-alpha. o Minor features (address selection, backport from 0.4.0.3-alpha): - Treat the subnet 100.64.0.0/10 as public for some purposes; private for others. This subnet is the RFC 6598 (Carrier Grade NAT) IP range, and is deployed by many ISPs as an alternative to RFC 1918 that does not break existing internal networks. Tor now blocks SOCKS and control ports on these addresses and warns users if client ports or ExtORPorts are listening on a RFC 6598 address. Closes ticket 28525. Patch by Neel Chauhan. o Minor features (bandwidth authority, backport from 0.4.0.4-rc): - Make bandwidth authorities ignore relays that are reported in the bandwidth file with the flag "vote=0". This change allows us to report unmeasured relays for diagnostic reasons without including their bandwidth in the bandwidth authorities' vote. Closes ticket 29806. o Minor features (compile-time modules, backport from version 0.4.1.1-alpha): - Add a "--list-modules" command to print a list of which compile- time modules are enabled. Closes ticket 30452. o Minor features (continuous integration, backport from 0.4.0.4-rc): - On Travis Rust builds, cleanup Rust registry and refrain from caching the "target/" directory to speed up builds. Resolves issue 29962. o Minor features (continuous integration, backport from 0.4.0.5): - In Travis, tell timelimit to use stem's backtrace signals, and launch python directly from timelimit, so python receives the signals from timelimit, rather than make. Closes ticket 30117. o Minor features (continuous integration, backport from 0.4.1.1-alpha): - Remove sudo configuration lines from .travis.yml as they are no longer needed with current Travis build environment. Resolves issue 30213. o Minor features (continuous integration, backport from 0.4.1.4-rc): - Our Travis configuration now uses Chutney to run some network integration tests automatically. Closes ticket 29280. o Minor features (continuous integration, backport from 0.4.2.2-alpha): - When building on Appveyor and Travis, pass the "-k" flag to make, so that we are informed of all compilation failures, not just the first one or two. Closes ticket 31372. o Minor features (fallback directory list, backport from 0.4.1.4-rc): - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc in December 2018 (of which ~122 were still functional), with a list of 148 fallbacks (70 new, 78 existing, 79 removed) generated in June 2019. Closes ticket 28795. o Minor features (geoip, backport from 0.4.2.5): - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2 Country database. Closes ticket 32685. o Minor features (NSS, diagnostic, backport from 0.4.0.4-rc): - Try to log an error from NSS (if there is any) and a more useful description of our situation if we are using NSS and a call to SSL_ExportKeyingMaterial() fails. Diagnostic for ticket 29241. o Minor features (stem tests, backport from 0.4.2.1-alpha): - Change "make test-stem" so it only runs the stem tests that use tor. This change makes test-stem faster and more reliable. Closes ticket 31554. o Minor bugfixes (security, backport from 0.4.0.4-rc): - Verify in more places that we are not about to create a buffer with more than INT_MAX bytes, to avoid possible OOB access in the event of bugs. Fixes bug 30041; bugfix on 0.2.0.16. Found and fixed by Tobias Stoeckmann. - Fix a potential double free bug when reading huge bandwidth files. The issue is not exploitable in the current Tor network because the vulnerable code is only reached when directory authorities read bandwidth files, but bandwidth files come from a trusted source (usually the authorities themselves). Furthermore, the issue is only exploitable in rare (non-POSIX) 32-bit architectures, which are not used by any of the current authorities. Fixes bug 30040; bugfix on 0.3.5.1-alpha. Bug found and fixed by Tobias Stoeckmann. o Minor bugfix (continuous integration, backport from 0.4.0.4-rc): - Reset coverage state on disk after Travis CI has finished. This should prevent future coverage merge errors from causing the test suite for the "process" subsystem to fail. The process subsystem was introduced in 0.4.0.1-alpha. Fixes bug 29036; bugfix on 0.2.9.15. - Terminate test-stem if it takes more than 9.5 minutes to run. (Travis terminates the job after 10 minutes of no output.) Diagnostic for 29437. Fixes bug 30011; bugfix on 0.3.5.4-alpha. o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha): - Avoid spurious errors when Appveyor CI fails before the install step. Fixes bug 31884; bugfix on 0.3.4.2-alpha. o Minor bugfixes (build system, backport form 0.4.2.1-alpha): - Do not include the deprecated <sys/sysctl.h> on Linux or Windows systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha. o Minor bugfixes (C correctness, backport from 0.4.0.4-rc): - Fix an unlikely memory leak in consensus_diff_apply(). Fixes bug 29824; bugfix on 0.3.1.1-alpha. This is Coverity warning CID 1444119. o Minor bugfixes (circuit isolation, backport from 0.4.1.3-alpha): - Fix a logic error that prevented the SessionGroup sub-option from being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha. o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc): - Fix a BUG() assertion that occurs within a very small race window between when a client intro circuit opens and when its descriptor gets cleaned up from the cache. The circuit is now closed early, which will trigger a re-fetch of the descriptor and continue the connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha. o Minor bugfixes (clock skew detection, backport from 0.4.1.5): - Don't believe clock skew results from NETINFO cells that appear to arrive before we sent the VERSIONS cells they are responding to. Previously, we would accept them up to 3 minutes "in the past". Fixes bug 31343; bugfix on 0.2.4.4-alpha. o Minor bugfixes (compilation warning, backport from 0.4.1.5): - Fix a compilation warning on Windows about casting a function pointer for GetTickCount64(). Fixes bug 31374; bugfix on 0.2.9.1-alpha. o Minor bugfixes (compilation, backport from 0.4.0.2-alpha): - Silence a compiler warning in test-memwipe.c on OpenBSD. Fixes bug 29145; bugfix on 0.2.9.3-alpha. Patch from Kris Katterjohn. o Minor bugfixes (compilation, backport from 0.4.1.5): - Avoid using labs() on time_t, which can cause compilation warnings on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha. o Minor bugfixes (compilation, backport from 0.4.2.1-alpha): - Suppress spurious float-conversion warnings from GCC when calling floating-point classifier functions on FreeBSD. Fixes part of bug 31687; bugfix on 0.3.1.5-alpha. o Minor bugfixes (compilation, unusual configurations, backport from 0.4.1.1-alpha): - Avoid failures when building with the ALL_BUGS_ARE_FATAL option due to missing declarations of abort(), and prevent other such failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha. o Minor bugfixes (configuration, proxies, backport from 0.4.1.2-alpha): - Fix a bug that prevented us from supporting SOCKS5 proxies that want authentication along with configured (but unused!) ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha. o Minor bugfixes (connections, backport from 0.4.2.3-rc): - Avoid trying to read data from closed connections, which can cause needless loops in Libevent and infinite loops in Shadow. Fixes bug 30344; bugfix on 0.1.1.1-alpha. o Minor bugfixes (continuous integration, backport from 0.4.1.3-alpha): - Allow the test-stem job to fail in Travis, because it sometimes hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha. - Skip test_rebind on macOS in Travis, because it is unreliable on macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha. - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha. o Minor bugfixes (crash on exit, backport from 0.4.1.4-rc): - Avoid a set of possible code paths that could try to use freed memory in routerlist_free() while Tor was exiting. Fixes bug 31003; bugfix on 0.1.2.2-alpha. o Minor bugfixes (directory authorities, backport from 0.4.1.3-alpha): - Stop crashing after parsing an unknown descriptor purpose annotation. We think this bug can only be triggered by modifying a local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha. o Minor bugfixes (directory authority, backport from 0.4.1.2-alpha): - Move the "bandwidth-file-headers" line in directory authority votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix on 0.3.5.1-alpha. o Minor bugfixes (error handling, backport from 0.4.2.1-alpha): - On abort, try harder to flush the output buffers of log messages. On some platforms (macOS), log messages could be discarded when the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha. - Report the tor version whenever an assertion fails. Previously, we only reported the Tor version on some crashes, and some non-fatal assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha. o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha): - When extracting an IPv6 address from a PF-based proxy, verify that we are actually configured to receive an IPv6 address, and log an internal error if not. Fixes part of bug 31687; bugfix on 0.2.3.4-alpha. o Minor bugfixes (guards, backport from 0.4.2.1-alpha): - When tor is missing descriptors for some primary entry guards, make the log message less alarming. It's normal for descriptors to expire, as long as tor fetches new ones soon after. Fixes bug 31657; bugfix on 0.3.3.1-alpha. o Minor bugfixes (logging, backport from 0.4.0.2-alpha): - Avoid logging that we are relaxing a circuit timeout when that timeout is fixed. Fixes bug 28698; bugfix on 0.2.4.7-alpha. o Minor bugfixes (logging, backport from 0.4.0.3-alpha): - Correct a misleading error message when IPv4Only or IPv6Only is used but the resolved address can not be interpreted as an address of the specified IP version. Fixes bug 13221; bugfix on 0.2.3.9-alpha. Patch from Kris Katterjohn. - Log the correct port number for listening sockets when "auto" is used to let Tor pick the port number. Previously, port 0 was logged instead of the actual port number. Fixes bug 29144; bugfix on 0.3.5.1-alpha. Patch from Kris Katterjohn. - Stop logging a BUG() warning when Tor is waiting for exit descriptors. Fixes bug 28656; bugfix on 0.3.5.1-alpha. o Minor bugfixes (logging, backport from 0.4.1.1-alpha): - Do not log a warning when running with an OpenSSL version other than the one Tor was compiled with, if the two versions should be compatible. Previously, we would warn whenever the version was different. Fixes bug 30190; bugfix on 0.2.4.2-alpha. o Minor bugfixes (logging, backport from 0.4.2.1-alpha): - Change log level of message "Hash of session info was not as expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix on 0.1.1.10-alpha. o Minor bugfixes (logging, backport from 0.4.2.2-alpha): - Rate-limit our the logging message about the obsolete .exit notation. Previously, there was no limit on this warning, which could potentially be triggered many times by a hostile website. Fixes bug 31466; bugfix on 0.2.2.1-alpha. o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha): - Do not log a nonfatal assertion failure when receiving a VERSIONS cell on a connection using the obsolete v1 link protocol. Log a protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha. o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha): - Reset the periodic events' "enabled" flag when Tor is shut down cleanly. Previously, this flag was left on, which caused periodic events not to be re-enabled when Tor was relaunched in-process with tor_api.h after a shutdown. Fixes bug 32058; bugfix on 0.3.3.1-alpha. o Minor bugfixes (memory leak, backport from 0.4.1.1-alpha): - Avoid a minor memory leak that could occur on relays when failing to create a "keys" directory. Fixes bug 30148; bugfix on 0.3.3.1-alpha. o Minor bugfixes (memory leak, backport from 0.4.1.4-rc): - Fix a trivial memory leak when parsing an invalid value from a download schedule in the configuration. Fixes bug 30894; bugfix on 0.3.4.1-alpha. o Minor bugfixes (memory management, backport from 0.4.0.3-alpha): - Refactor the shared random state's memory management so that it actually takes ownership of the shared random value pointers. Fixes bug 29706; bugfix on 0.2.9.1-alpha. o Minor bugfixes (memory management, testing, backport from 0.4.0.3-alpha): - Stop leaking parts of the shared random state in the shared-random unit tests. Fixes bug 29599; bugfix on 0.2.9.1-alpha. o Minor bugfixes (onion services, backport from 0.4.1.1-alpha): - Avoid a GCC 9.1.1 warning (and possible crash depending on libc implemenation) when failing to load an onion service client authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha. o Minor bugfixes (out-of-memory handler, backport from 0.4.1.2-alpha): - When purging the DNS cache because of an out-of-memory condition, try purging just the older entries at first. Previously, we would always purge the whole thing. Fixes bug 29617; bugfix on 0.3.5.1-alpha. o Minor bugfixes (portability, backport from 0.4.1.2-alpha): - Avoid crashing in our tor_vasprintf() implementation on systems that define neither vasprintf() nor _vscprintf(). (This bug has been here long enough that we question whether people are running Tor on such systems, but we're applying the fix out of caution.) Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by Tobias Stoeckmann. o Minor bugfixes (relay, backport from 0.4.2.2-alpha): - Avoid crashing when starting with a corrupt keys directory where the old ntor key and the new ntor key are identical. Fixes bug 30916; bugfix on 0.2.4.8-alpha. o Minor bugfixes (rust, backport from 0.4.0.5): - Abort on panic in all build profiles, instead of potentially unwinding into C code. Fixes bug 27199; bugfix on 0.3.3.1-alpha. o Minor bugfixes (rust, backport from 0.4.2.1-alpha): - Correctly exclude a redundant rust build job in Travis. Fixes bug 31463; bugfix on 0.3.5.4-alpha. o Minor bugfixes (single onion services, backport from 0.4.0.3-alpha): - Allow connections to single onion services to remain idle without being disconnected. Previously, relays acting as rendezvous points for single onion services were mistakenly closing idle rendezvous circuits after 60 seconds, thinking that they were unused directory-fetching circuits that had served their purpose. Fixes bug 29665; bugfix on 0.2.1.26. o Minor bugfixes (stats, backport from 0.4.0.3-alpha): - When ExtraInfoStatistics is 0, stop including PaddingStatistics in relay and bridge extra-info documents. Fixes bug 29017; bugfix on 0.3.1.1-alpha. o Minor bugfixes (testing, backport from 0.4.0.3-alpha): - Downgrade some LOG_ERR messages in the address/* tests to warnings. The LOG_ERR messages were occurring when we had no configured network. We were failing the unit tests, because we backported 28668 to 0.3.5.8, but did not backport 29530. Fixes bug 29530; bugfix on 0.3.5.8. - Fix our gcov wrapper script to look for object files at the correct locations. Fixes bug 29435; bugfix on 0.3.5.1-alpha. o Minor bugfixes (testing, backport from 0.4.0.4-rc): - Backport the 0.3.4 src/test/test-network.sh to 0.2.9. We need a recent test-network.sh to use new chutney features in CI. Fixes bug 29703; bugfix on 0.2.9.1-alpha. - Fix a test failure on Windows caused by an unexpected "BUG" warning in our tests for tor_gmtime_r(-1). Fixes bug 29922; bugfix on 0.2.9.3-alpha. o Minor bugfixes (testing, backport from 0.4.2.3-alpha): - When testing port rebinding, don't busy-wait for tor to log. Instead, actually sleep for a short time before polling again. Also improve the formatting of control commands and log messages. Fixes bug 31837; bugfix on 0.3.5.1-alpha. o Minor bugfixes (TLS protocol, backport form 0.4.0.4-rc): - When classifying a client's selection of TLS ciphers, if the client ciphers are not yet available, do not cache the result. Previously, we had cached the unavailability of the cipher list and never looked again, which in turn led us to assume that the client only supported the ancient V1 link protocol. This, in turn, was causing Stem integration tests to stall in some cases. Fixes bug 30021; bugfix on 0.2.4.8-alpha. o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha): - Log bugs about the TLS read buffer's length only once, rather than filling the logs with similar warnings. Fixes bug 31939; bugfix on 0.3.0.4-rc. o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha): - Always retry v2 single onion service intro and rend circuits with a 3-hop path. Previously, v2 single onion services used a 3-hop path when rendezvous circuits were retried after a remote or delayed failure, but a 1-hop path for immediate retries. Fixes bug 23818; bugfix on 0.2.9.3-alpha. - Make v3 single onion services fall back to a 3-hop intro, when all intro points are unreachable via a 1-hop path. Previously, v3 single onion services failed when all intro nodes were unreachable via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha. o Minor bugfixes (Windows, CI, backport from 0.4.0.3-alpha): - Skip the Appveyor 32-bit Windows Server 2016 job, and 64-bit Windows Server 2012 R2 job. The remaining 2 jobs still provide coverage of 64/32-bit, and Windows Server 2016/2012 R2. Also set fast_finish, so failed jobs terminate the build immediately. Fixes bug 29601; bugfix on 0.3.5.4-alpha. o Documentation (backport from 0.4.2.1-alpha): - Use RFC 2397 data URL scheme to embed an image into tor-exit- notice.html so that operators no longer have to host it themselves. Closes ticket 31089. o Testing (backport from 0.4.1.2-alpha): - Specify torrc paths (with empty files) when launching tor in integration tests; refrain from reading user and system torrcs. Resolves issue 29702. o Testing (continuous integration, backport from 0.4.1.1-alpha): - In Travis, show stem's tor log after failure. Closes ticket 30234. o Testing (continuous integration, backport from 0.4.1.5): - In Travis, make stem log a controller trace to the console, and tail stem's tor log after failure. Closes ticket 30591. - In Travis, only run the stem tests that use a tor binary. Closes ticket 30694. o Testing (continuous integration, backport from 0.4.2.3-alpha): - Disable all but one Travis CI macOS build, to mitigate slow scheduling of Travis macOS jobs. Closes ticket 32177. - Run the chutney IPv6 networks as part of Travis CI. Closes ticket 30860. - Simplify the Travis CI build matrix, and optimise for build time. Closes ticket 31859. - Use Windows Server 2019 instead of Windows Server 2016 in our Appveyor builds. Closes ticket 32086. o Testing (continuous integration, backport from 0.4.2.4-rc): - Use Ubuntu Bionic images for our Travis CI builds, so we can get a recent version of coccinelle. But leave chutney on Ubuntu Trusty, until we can fix some Bionic permissions issues (see ticket 32240). Related to ticket 31919. - Install the mingw OpenSSL package in Appveyor. This makes sure that the OpenSSL headers and libraries match in Tor's Appveyor builds. (This bug was triggered by an Appveyor image update.) Fixes bug 32449; bugfix on 0.3.5.6-rc. - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241. o Testing (continuous integration, backport from 0.4.2.5): - Require C99 standards-conforming code in Travis CI, but allow GNU gcc extensions. Also activates clang's -Wtypedef-redefinition warnings. Build some jobs with -std=gnu99, and some jobs without. Closes ticket 32500.

1 0

New stable release: 0.4.2.5
by Nick Mathewson 09 Dec '19

09 Dec '19

Hello, everyone! (If you are about to reply saying "please take me off this list", instead please follow these instructions: https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-announce/ . If you have trouble, it is probably because you subscribed using a different address than the one you are trying to unsubscribe with. You will have to enter the actual email address you used when you subscribed.) After months of work, Tor 0.4.2.5 is now available! This is the first stable release in the 0.4.2.x series, and we hope you find it useful. You can download the source code from the usual place on the website. Packages should be available within the next several weeks, with a new Tor Browser around January 7. Changes in version 0.4.2.5 - 2019-12-09 This is the first stable release in the 0.4.2.x series. This series improves reliability and stability, and includes several stability and correctness improvements for onion services. It also fixes many smaller bugs present in previous series. Per our support policy, we will support the 0.4.2.x series for nine months, or until three months after the release of a stable 0.4.3.x: whichever is longer. If you need longer-term support, please stick with 0.3.5.x, which will we plan to support until Feb 2022. Below are the changes since 0.4.1.4-rc. For a complete list of only the changes since 0.4.2.4-rc, see the ChangeLog file. o Major features (directory authorities): - Directory authorities now reject relays running all currently deprecated release series. The currently supported release series are: 0.2.9, 0.3.5, 0.4.0, 0.4.1, and 0.4.2. Closes ticket 31549. o Major features (onion service v3, denial of service): - Add onion service introduction denial of service defenses. Intro points can now rate-limit client introduction requests, using parameters that can be sent by the service within the ESTABLISH_INTRO cell. If the cell extension for this is not used, the intro point will honor the consensus parameters. Closes ticket 30924. o Major bugfixes (circuit build, guard): - When considering upgrading circuits from "waiting for guard" to "open", always ignore circuits that are marked for close. Previously we could end up in the situation where a subsystem is notified of a circuit opening, but the circuit is still marked for close, leading to undesirable behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha. o Major bugfixes (crash, Linux, Android): - Tolerate systems (including some Android installations) where madvise and MADV_DONTDUMP are available at build-time, but not at run time. Previously, these systems would notice a failed syscall and abort. Fixes bug 31570; bugfix on 0.4.1.1-alpha. - Tolerate systems (including some Linux installations) where madvise and/or MADV_DONTFORK are available at build-time, but not at run time. Previously, these systems would notice a failed syscall and abort. Fixes bug 31696; bugfix on 0.4.1.1-alpha. o Major bugfixes (embedded Tor): - Avoid a possible crash when restarting Tor in embedded mode and enabling a different set of publish/subscribe messages. Fixes bug 31898; bugfix on 0.4.1.1-alpha. o Major bugfixes (relay): - Relays now respect their AccountingMax bandwidth again. When relays entered "soft" hibernation (which typically starts when we've hit 90% of our AccountingMax), we had stopped checking whether we should enter hard hibernation. Soft hibernation refuses new connections and new circuits, but the existing circuits can continue, meaning that relays could have exceeded their configured AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha. o Major bugfixes (torrc parsing): - Stop ignoring torrc options after an %include directive, when the included directory ends with a file that does not contain any config options (but does contain comments or whitespace). Fixes bug 31408; bugfix on 0.3.1.1-alpha. o Major bugfixes (v3 onion services): - Onion services now always use the exact number of intro points configured with the HiddenServiceNumIntroductionPoints option (or fewer if nodes are excluded). Before, a service could sometimes pick more intro points than configured. Fixes bug 31548; bugfix on 0.3.2.1-alpha. o Minor feature (onion services, control port): - The ADD_ONION command's keyword "BEST" now defaults to ED25519-V3 (v3) onion services. Previously it defaulted to RSA1024 (v2). Closes ticket 29669. o Minor features (auto-formatting scripts): - When annotating C macros, never generate a line that our check- spaces script would reject. Closes ticket 31759. - When annotating C macros, try to remove cases of double-negation. Closes ticket 31779. o Minor features (best practices tracker): - Our best-practices tracker now integrates with our include-checker tool to keep track of how many layering violations we have not yet fixed. We hope to reduce this number over time to improve Tor's modularity. Closes ticket 31176. - Add a TOR_PRACTRACKER_OPTIONS variable for passing arguments to practracker from the environment. We may want this for continuous integration. Closes ticket 31309. - Give a warning rather than an error when a practracker exception is violated by a small amount, add a --list-overbroad option to practracker that lists exceptions that are stricter than they need to be, and provide an environment variable for disabling practracker. Closes ticket 30752. - Our best-practices tracker now looks at headers as well as C files. Closes ticket 31175. o Minor features (build system): - Make pkg-config use --prefix when cross-compiling, if PKG_CONFIG_PATH is not set. Closes ticket 32191. - Add --disable-manpage and --disable-html-manual options to configure script. This will enable shortening build times by not building documentation. Resolves issue 19381. o Minor features (compilation): - Log a more useful error message when we are compiling and one of the compile-time hardening options we have selected can be linked but not executed. Closes ticket 27530. o Minor features (configuration): - The configuration code has been extended to allow splitting configuration data across multiple objects. Previously, all configuration data needed to be kept in a single object, which tended to become bloated. Closes ticket 31240. o Minor features (continuous integration): - When building on Appveyor and Travis, pass the "-k" flag to make, so that we are informed of all compilation failures, not just the first one or two. Closes ticket 31372. - When running CI builds on Travis, put some random data in ~/.torrc, to make sure no tests are reading the Tor configuration file from its default location. Resolves issue 30102. o Minor features (debugging): - Log a nonfatal assertion failure if we encounter a configuration line whose command is "CLEAR" but which has a nonempty value. This should be impossible, according to the rules of our configuration line parsing. Closes ticket 31529. o Minor features (geoip): - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2 Country database. Closes ticket 32685. o Minor features (git hooks): - Our pre-commit git hook now checks for a special file before running practracker, so that practracker only runs on branches that are based on master. Since the pre-push hook calls the pre- commit hook, practracker will also only run before pushes of branches based on master. Closes ticket 30979. o Minor features (git scripts): - Add a "--" command-line argument, to separate git-push-all.sh script arguments from arguments that are passed through to git push. Closes ticket 31314. - Add a -r <remote-name> argument to git-push-all.sh, so the script can push test branches to a personal remote. Closes ticket 31314. - Add a -t <test-branch-prefix> argument to git-merge-forward.sh and git-push-all.sh, which makes these scripts create, merge forward, and push test branches. Closes ticket 31314. - Add a -u argument to git-merge-forward.sh, so that the script can re-use existing test branches after a merge failure and fix. Closes ticket 31314. - Add a TOR_GIT_PUSH env var, which sets the default git push command and arguments for git-push-all.sh. Closes ticket 31314. - Add a TOR_PUSH_DELAY variable to git-push-all.sh, which makes the script push master and maint branches with a delay between each branch. These delays trigger the CI jobs in a set order, which should show the most likely failures first. Also make pushes atomic by default, and make the script pass any command-line arguments to git push. Closes ticket 29879. - Call the shellcheck script from the pre-commit hook. Closes ticket 30967. - Skip pushing test branches that are the same as a remote maint/release/master branch in git-push-all.sh by default. Add a -s argument, so git-push-all.sh can push all test branches. Closes ticket 31314. o Minor features (IPv6, logging): - Log IPv6 addresses as well as IPv4 addresses when describing routerinfos, routerstatuses, and nodes. Closes ticket 21003. o Minor features (maintenance scripts): - Add a Coccinelle script to detect bugs caused by incrementing or decrementing a variable inside a call to log_debug(). Since log_debug() is a macro whose arguments are conditionally evaluated, it is usually an error to do this. One such bug was 30628, in which SENDME cells were miscounted by a decrement operator inside a log_debug() call. Closes ticket 30743. o Minor features (onion service v3): - Do not allow single hop clients to fetch or post an HS descriptor from an HSDir. Closes ticket 24964. o Minor features (onion service): - Disallow single-hop clients at the introduction point. We've removed Tor2web support a while back and single-hop rendezvous attempts are blocked at the relays. This change should remove load off the network from spammy clients. Close ticket 24963. o Minor features (onion services v3): - Assist users who try to setup v2 client authorization in v3 onion services by pointing them to the right documentation. Closes ticket 28966. o Minor features (stem tests): - Change "make test-stem" so it only runs the stem tests that use tor. This change makes test-stem faster and more reliable. Closes ticket 31554. o Minor features (testing): - When running tests that attempt to look up hostnames, replace the libc name lookup functions with ones that do not actually touch the network. This way, the tests complete more quickly in the presence of a slow or missing DNS resolver. Closes ticket 31841. - Add a script to invoke "tor --dump-config" and "tor --verify-config" with various configuration options, and see whether tor's resulting configuration or error messages are what we expect. Use it for integration testing of our +Option and /Option flags. Closes ticket 31637. - Improve test coverage for our existing configuration parsing and management API. Closes ticket 30893. - Add integration tests to make sure that practracker gives the outputs we expect. Closes ticket 31477. - The practracker self-tests are now run as part of the Tor test suite. Closes ticket 31304. o Minor features (testing, continuous integration): - Disable all but one Travis CI macOS build, to mitigate slow scheduling of Travis macOS jobs. Closes ticket 32177. - Run the chutney IPv6 networks as part of Travis CI. Closes ticket 30860. - Simplify the Travis CI build matrix, and optimise for build time. Closes ticket 31859. - Use Windows Server 2019 instead of Windows Server 2016 in our Appveyor builds. Closes ticket 32086. o Minor features (token bucket): - Implement a generic token bucket that uses a single counter, for use in anti-DoS onion service work. Closes ticket 30687. o Minor bugfixes (Appveyor continuous integration): - Avoid spurious errors when Appveyor CI fails before the install step. Fixes bug 31884; bugfix on 0.3.4.2-alpha. o Minor bugfixes (best practices tracker): - Fix a few issues in the best-practices script, including tests, tab tolerance, error reporting, and directory-exclusion logic. Fixes bug 29746; bugfix on 0.4.1.1-alpha. - When running check-best-practices, only consider files in the src subdirectory. Previously we had recursively considered all subdirectories, which made us get confused by the temporary directories made by "make distcheck". Fixes bug 31578; bugfix on 0.4.1.1-alpha. o Minor bugfixes (build system): - Interpret "--disable-module-dirauth=no" correctly. Fixes bug 32124; bugfix on 0.3.4.1-alpha. - Interpret "--with-tcmalloc=no" correctly. Fixes bug 32124; bugfix on 0.2.0.20-rc. - Stop failing when jemalloc is requested, but tcmalloc is not found. Fixes bug 32124; bugfix on 0.3.5.1-alpha. - When pkg-config is not installed, or a library that depends on pkg-config is not found, tell the user what to do to fix the problem. Fixes bug 31922; bugfix on 0.3.1.1-alpha. - Do not include the deprecated <sys/sysctl.h> on Linux or Windows systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha. o Minor bugfixes (chutney, makefiles, documentation): - "make test-network-all" now shows the warnings from each test- network.sh run on the console, so developers see new warnings early. We've also improved the documentation for this feature, and renamed a Makefile variable so the code is self-documenting. Fixes bug 30455; bugfix on 0.3.0.4-rc. o Minor bugfixes (client, onion service v3): - Fix a BUG() assertion that occurs within a very small race window between when a client intro circuit opens and when its descriptor gets cleaned up from the cache. The circuit is now closed early, which will trigger a re-fetch of the descriptor and continue the connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha. o Minor bugfixes (code quality): - Fix "make check-includes" so it runs correctly on out-of-tree builds. Fixes bug 31335; bugfix on 0.3.5.1-alpha. o Minor bugfixes (compilation): - Add more stub functions to fix compilation on Android with link- time optimization when --disable-module-dirauth is used. Previously, these compilation settings would make the compiler look for functions that didn't exist. Fixes bug 31552; bugfix on 0.4.1.1-alpha. - Suppress spurious float-conversion warnings from GCC when calling floating-point classifier functions on FreeBSD. Fixes part of bug 31687; bugfix on 0.3.1.5-alpha. o Minor bugfixes (configuration): - Invalid floating-point values in the configuration file are now treated as errors in the configuration. Previously, they were ignored and treated as zero. Fixes bug 31475; bugfix on 0.0.1. o Minor bugfixes (connections): - Avoid trying to read data from closed connections, which can cause needless loops in Libevent and infinite loops in Shadow. Fixes bug 30344; bugfix on 0.1.1.1-alpha. o Minor bugfixes (controller protocol): - Fix the MAPADDRESS controller command to accept one or more arguments. Previously, it required two or more arguments, and ignored the first. Fixes bug 31772; bugfix on 0.4.1.1-alpha. o Minor bugfixes (coverity): - Add an assertion when parsing a BEGIN cell so that coverity can be sure that we are not about to dereference a NULL address. Fixes bug 31026; bugfix on 0.2.4.7-alpha. This is CID 1447296. - In our siphash implementation, when building for coverity, use memcpy in place of a switch statement, so that coverity can tell we are not accessing out-of-bounds memory. Fixes bug 31025; bugfix on 0.2.8.1-alpha. This is tracked as CID 1447293 and 1447295. - Fix several coverity warnings from our unit tests. Fixes bug 31030; bugfix on 0.2.4.1-alpha, 0.3.2.1-alpha, and 0.4.0.1-alpha. o Minor bugfixes (crash): - When running Tor with an option like --verify-config or --dump-config that does not start the event loop, avoid crashing if we try to exit early because of an error. Fixes bug 32407; bugfix on 0.3.3.1-alpha. o Minor bugfixes (developer tooling): - Only log git script changes in the post-merge script when the merge was to the master branch. Fixes bug 31040; bugfix on 0.4.1.1-alpha. o Minor bugfixes (directory authorities): - Return a distinct status when formatting annotations fails. Fixes bug 30780; bugfix on 0.2.0.8-alpha. o Minor bugfixes (error handling): - Always lock the backtrace buffer before it is used. Fixes bug 31734; bugfix on 0.2.5.3-alpha. - On abort, try harder to flush the output buffers of log messages. On some platforms (macOS), log messages could be discarded when the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha. - Report the tor version whenever an assertion fails. Previously, we only reported the Tor version on some crashes, and some non-fatal assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha. - When tor aborts due to an error, close log file descriptors before aborting. Closing the logs makes some OSes flush log file buffers, rather than deleting buffered log lines. Fixes bug 31594; bugfix on 0.2.5.2-alpha. o Minor bugfixes (FreeBSD, PF-based proxy, IPv6): - When extracting an IPv6 address from a PF-based proxy, verify that we are actually configured to receive an IPv6 address, and log an internal error if not. Fixes part of bug 31687; bugfix on 0.2.3.4-alpha. o Minor bugfixes (git hooks): - Remove a duplicate call to practracker from the pre-push hook. The pre-push hook already calls the pre-commit hook, which calls practracker. Fixes bug 31462; bugfix on 0.4.1.1-alpha. o Minor bugfixes (git scripts): - Stop hard-coding the bash path in the git scripts. Some OSes don't have bash in /usr/bin, others have an ancient bash at this path. Fixes bug 30840; bugfix on 0.4.0.1-alpha. - Stop hard-coding the tor master branch name and worktree path in the git scripts. Fixes bug 30841; bugfix on 0.4.0.1-alpha. - Allow git-push-all.sh to be run from any directory. Previously, the script only worked if run from an upstream worktree directory. Closes ticket 31678. o Minor bugfixes (guards): - When tor is missing descriptors for some primary entry guards, make the log message less alarming. It's normal for descriptors to expire, as long as tor fetches new ones soon after. Fixes bug 31657; bugfix on 0.3.3.1-alpha. o Minor bugfixes (ipv6): - Check for private IPv6 addresses alongside their IPv4 equivalents when authorities check descriptors. Previously, we only checked for private IPv4 addresses. Fixes bug 31088; bugfix on 0.2.3.21-rc. Patch by Neel Chauhan. - When parsing microdescriptors, we should check the IPv6 exit policy alongside IPv4. Previously, we checked both exit policies for only router info structures, while microdescriptors were IPv4-only. Fixes bug 27284; bugfix on 0.2.3.1-alpha. Patch by Neel Chauhan. o Minor bugfixes (logging): - Add a missing check for HAVE_PTHREAD_H, because the backtrace code uses mutexes. Fixes bug 31614; bugfix on 0.2.5.2-alpha. - Disable backtrace signal handlers when shutting down tor. Fixes bug 31614; bugfix on 0.2.5.2-alpha. - Rate-limit our the logging message about the obsolete .exit notation. Previously, there was no limit on this warning, which could potentially be triggered many times by a hostile website. Fixes bug 31466; bugfix on 0.2.2.1-alpha. - When initialising log domain masks, only set known log domains. Fixes bug 31854; bugfix on 0.2.1.1-alpha. - Change log level of message "Hash of session info was not as expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix on 0.1.1.10-alpha. - Fix a code issue that would have broken our parsing of log domains as soon as we had 33 of them. Fortunately, we still only have 29. Fixes bug 31451; bugfix on 0.4.1.4-rc. o Minor bugfixes (logging, protocol violations): - Do not log a nonfatal assertion failure when receiving a VERSIONS cell on a connection using the obsolete v1 link protocol. Log a protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha. o Minor bugfixes (mainloop, periodic events, in-process API): - Reset the periodic events' "enabled" flag when Tor is shut down cleanly. Previously, this flag was left on, which caused periodic events not to be re-enabled when Tor was relaunched in-process with tor_api.h after a shutdown. Fixes bug 32058; bugfix on 0.3.3.1-alpha. o Minor bugfixes (memory management): - Stop leaking a small amount of memory in nt_service_install(), in unreachable code. Fixes bug 30799; bugfix on 0.2.0.7-alpha. Patch by Xiaoyin Liu. o Minor bugfixes (modules): - Explain what the optional Directory Authority module is, and what happens when it is disabled. Fixes bug 31825; bugfix on 0.3.4.1-alpha. o Minor bugfixes (multithreading): - Avoid some undefined behaviour when freeing mutexes. Fixes bug 31736; bugfix on 0.0.7. o Minor bugfixes (networking, IP addresses): - When parsing addresses via Tor's internal DNS lookup API, reject IPv4 addresses in square brackets, and accept IPv6 addresses in square brackets. This change completes the work started in 23082, making address parsing consistent between tor's internal DNS lookup and address parsing APIs. Fixes bug 30721; bugfix on 0.2.1.5-alpha. - When parsing addresses via Tor's internal address:port parsing and DNS lookup APIs, require IPv6 addresses with ports to have square brackets. But allow IPv6 addresses without ports, whether or not they have square brackets. Fixes bug 30721; bugfix on 0.2.1.5-alpha. o Minor bugfixes (onion service v3): - When purging the client descriptor cache, close any introduction point circuits associated with purged cache entries. This avoids picking those circuits later when connecting to the same introduction points. Fixes bug 30921; bugfix on 0.3.2.1-alpha. o Minor bugfixes (onion services): - In the hs_ident_circuit_t data structure, remove the unused field circuit_type and the respective argument in hs_ident_circuit_new(). This field was set by clients (for introduction) and services (for introduction and rendezvous) but was never used afterwards. Fixes bug 31490; bugfix on 0.3.2.1-alpha. Patch by Neel Chauhan. o Minor bugfixes (operator tools): - Make tor-print-ed-signing-cert(1) print certificate expiration date in RFC 1123 and UNIX timestamp formats, to make output machine readable. Fixes bug 31012; bugfix on 0.3.5.1-alpha. o Minor bugfixes (process management): - Remove overly strict assertions that triggered when a pluggable transport failed to launch. Fixes bug 31091; bugfix on 0.4.0.1-alpha. - Remove an assertion in the Unix process backend. This assertion would trigger when we failed to find the executable for a child process. Fixes bug 31810; bugfix on 0.4.0.1-alpha. o Minor bugfixes (relay): - Avoid crashing when starting with a corrupt keys directory where the old ntor key and the new ntor key are identical. Fixes bug 30916; bugfix on 0.2.4.8-alpha. o Minor bugfixes (rust): - Correctly exclude a redundant rust build job in Travis. Fixes bug 31463; bugfix on 0.3.5.4-alpha. - Raise the minimum rustc version to 1.31.0, as checked by configure and CI. Fixes bug 31442; bugfix on 0.3.5.4-alpha. o Minor bugfixes (sendme, code structure): - Rename the trunnel SENDME file definition from sendme.trunnel to sendme_cell.trunnel to avoid having twice sendme.{c|h} in the repository. Fixes bug 30769; bugfix on 0.4.1.1-alpha. o Minor bugfixes (statistics): - Stop removing the ed25519 signature if the extra info file is too big. If the signature data was removed, but the keyword was kept, this could result in an unparseable extra info file. Fixes bug 30958; bugfix on 0.2.7.2-alpha. o Minor bugfixes (subsystems): - Make the subsystem init order match the subsystem module dependencies. Call windows process security APIs as early as possible. Initialize logging before network and time, so that network and time can use logging. Fixes bug 31615; bugfix on 0.4.0.1-alpha. o Minor bugfixes (testing): - Avoid intermittent test failures due to a test that had relied on inconsistent timing sources. Fixes bug 31995; bugfix on 0.3.1.3-alpha. - When testing port rebinding, don't busy-wait for tor to log. Instead, actually sleep for a short time before polling again. Also improve the formatting of control commands and log messages. Fixes bug 31837; bugfix on 0.3.5.1-alpha. - Teach the util/socketpair_ersatz test to work correctly when we have no network stack configured. Fixes bug 30804; bugfix on 0.2.5.1-alpha. o Minor bugfixes (tests, SunOS): - Avoid a map_anon_nofork test failure due to a signed/unsigned integer comparison. Fixes bug 31897; bugfix on 0.4.1.1-alpha. o Minor bugfixes (tls, logging): - Log bugs about the TLS read buffer's length only once, rather than filling the logs with similar warnings. Fixes bug 31939; bugfix on 0.3.0.4-rc. o Minor bugfixes (v2 single onion services): - Always retry v2 single onion service intro and rend circuits with a 3-hop path. Previously, v2 single onion services used a 3-hop path when rendezvous circuits were retried after a remote or delayed failure, but a 1-hop path for immediate retries. Fixes bug 23818; bugfix on 0.2.9.3-alpha. o Minor bugfixes (v3 onion services): - When cleaning up intro circuits for a v3 onion service, don't remove circuits that have an established or pending circuit, even if they ran out of retries. This way, we don't remove a circuit on its last retry. Fixes bug 31652; bugfix on 0.3.2.1-alpha. o Minor bugfixes (v3 single onion services): - Always retry v3 single onion service intro and rend circuits with a 3-hop path. Previously, v3 single onion services used a 3-hop path when rend circuits were retried after a remote or delayed failure, but a 1-hop path for immediate retries. Fixes bug 23818; bugfix on 0.3.2.1-alpha. - Make v3 single onion services fall back to a 3-hop intro, when all intro points are unreachable via a 1-hop path. Previously, v3 single onion services failed when all intro nodes were unreachable via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha. o Code simplification and refactoring: - Refactor connection_control_process_inbuf() to reduce the size of a practracker exception. Closes ticket 31840. - Refactor the microdescs_parse_from_string() function into smaller pieces, for better comprehensibility. Closes ticket 31675. - Use SEVERITY_MASK_IDX() to find the LOG_* mask indexes in the unit tests and fuzzers, rather than using hard-coded values. Closes ticket 31334. - Interface for function `decrypt_desc_layer` cleaned up. Closes ticket 31589. o Documentation: - Correct the description of "GuardLifetime". Fixes bug 31189; bugfix on 0.3.0.1-alpha. - Make clear in the man page, in both the bandwidth section and the AccountingMax section, that Tor counts in powers of two, not powers of ten: 1 GByte is 1024*1024*1024 bytes, not one billion bytes. Resolves ticket 32106. - Document the signal-safe logging behaviour in the tor man page. Also add some comments to the relevant functions. Closes ticket 31839. - Explain why we can't destroy the backtrace buffer mutex. Explain why we don't need to destroy the log mutex. Closes ticket 31736. - The Tor source code repository now includes a (somewhat dated) description of Tor's modular architecture, in doc/HACKING/design. This is based on the old "tor-guts.git" repository, which we are adopting and superseding. Closes ticket 31849. - Improve documentation in circuit padding subsystem. Patch by Tobias Pulls. Closes ticket 31113. - Include an example usage for IPv6 ORPort in our sample torrc. Closes ticket 31320; patch from Ali Raheem. - Use RFC 2397 data URL scheme to embed an image into tor-exit- notice.html so that operators no longer have to host it themselves. Closes ticket 31089. o Removed features: - No longer include recommended package digests in votes as detailed in proposal 301. The RecommendedPackages torrc option is deprecated and will no longer have any effect. "package" lines will still be considered when computing consensuses for consensus methods that include them. (This change has no effect on the list of recommended Tor versions, which is still in use.) Closes ticket 29738. - Remove torctl.in from contrib/dist directory. Resolves ticket 30550. o Testing: - Require C99 standards-conforming code in Travis CI, but allow GNU gcc extensions. Also activates clang's -Wtypedef-redefinition warnings. Build some jobs with -std=gnu99, and some jobs without. Closes ticket 32500. - Run shellcheck for all non-third-party shell scripts that are shipped with Tor. Closes ticket 29533. - When checking shell scripts, ignore any user-created directories. Closes ticket 30967. o Code simplification and refactoring (config handling): - Extract our variable manipulation code from confparse.c to a new lower-level typedvar.h module. Closes ticket 30864. - Lower another layer of object management from confparse.c to a more general tool. Now typed structure members are accessible via an abstract type. Implements ticket 30914. - Move our backend logic for working with configuration and state files into a lower-level library, since it no longer depends on any tor-specific functionality. Closes ticket 31626. - Numerous simplifications in configuration-handling logic: remove duplicated macro definitions, replace magical names with flags, and refactor "TestingTorNetwork" to use the same default-option logic as the rest of Tor. Closes ticket 30935. - Replace our ad-hoc set of flags for configuration variables and configuration variable types with fine-grained orthogonal flags corresponding to the actual behavior we want. Closes ticket 31625. o Code simplification and refactoring (misc): - Eliminate some uses of lower-level control reply abstractions, primarily in the onion_helper functions. Closes ticket 30889. - Rework bootstrap tracking to use the new publish-subscribe subsystem. Closes ticket 29976. - Rewrite format_node_description() and router_get_verbose_nickname() to use strlcpy() and strlcat(). The previous implementation used memcpy() and pointer arithmetic, which was error-prone. Closes ticket 31545. This is CID 1452819. - Split extrainfo_dump_to_string() into smaller functions. Closes ticket 30956. - Use the ptrdiff_t type consistently for expressing variable offsets and pointer differences. Previously we incorrectly (but harmlessly) used int and sometimes off_t for these cases. Closes ticket 31532. - Use the subsystems mechanism to manage the main event loop code. Closes ticket 30806. - Various simplifications and minor improvements to the circuit padding machines. Patch by Tobias Pulls. Closes tickets 31112 and 31098. o Documentation (hard-coded directories): - Improve the documentation for the DirAuthority and FallbackDir torrc options. Closes ticket 30955. o Documentation (tor.1 man page): - Fix typo in tor.1 man page: the option is "--help", not "-help". Fixes bug 31008; bugfix on 0.2.2.9-alpha. o Testing (continuous integration): - Use Ubuntu Bionic images for our Travis CI builds, so we can get a recent version of coccinelle. But leave chutney on Ubuntu Trusty, until we can fix some Bionic permissions issues (see ticket 32240). Related to ticket 31919. - Install the mingw OpenSSL package in Appveyor. This makes sure that the OpenSSL headers and libraries match in Tor's Appveyor builds. (This bug was triggered by an Appveyor image update.) Fixes bug 32449; bugfix on 0.3.5.6-rc. - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.

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Tor Browser 9.0.2 is released
by Nicolas Vigier 03 Dec '19

03 Dec '19

Tor Browser 9.0.2 is now available from the Tor Browser download page [1] and also from our distribution directory [2]. 1: https://www.torproject.org/download/ 2: https://www.torproject.org/dist/torbrowser/9.0.2/ This release features important security updates [3] to Firefox. 3: https://www.mozilla.org/en-US/security/advisories/mfsa2019-37/ This new stable release is picking up security fixes for Firefox 68.3.0esr and updating our external extensions (NoScript and HTTPS Everywhere) to their latest versions. Apart from backports for patches that already landed in alpha releases and fixing an error in our circuit display and improving our letterboxing support, Tor Browser 9.0.2 provides properly localized Android bundles again as well. _Reproducible Builds_ The issue with reproducible builds mentioned in the 9.0.1 blog post [4] is still present in this release. We however made progress on understanding the issue [5] and are getting closer to a fix. 4: https://blog.torproject.org/new-release-tor-browser-901 5: https://trac.torproject.org/projects/tor/ticket/32053 _ChangeLog_ The full changelog since Tor Browser 9.0.1 is: * All Platforms * Update Firefox to 68.3.0esr * Bump NoScript to 11.0.9 * Bug 32362: NoScript TRUSTED setting doesn't work * Bug 32429: Issues with about:blank and NoScript on .onion sites * Bump HTTPS Everywhere to 2019.11.7 * Bug 27268: Preferences clean-up in Torbutton code * Translations update * Windows + OS X + Linux * Bug 32125: Fix circuit display for bridge without a fingerprint * Bug 32250: Backport enhanced letterboxing support (bug 1546832 and 1556017) * Windows * Bug 31989: Backport backout of old mingw-gcc patch * Bug 32616: Disable GetSecureOutputDirectoryPath() functionality * Android * Bug 32365: Localization is broken in Tor Browser 9 on Android * Build System * All Platforms * Bug 32413: Bump Go version to 1.12.13

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