[tor-commits] [tor/master] forward-port releasenotes and changelog
nickm at torproject.org
nickm at torproject.org
Mon Dec 19 15:15:42 UTC 2016
commit e577eb22f703f89de48e911013e1e18f97f8e20a
Author: Nick Mathewson <nickm at torproject.org>
Date: Mon Dec 19 10:15:29 2016 -0500
forward-port releasenotes and changelog
---
ChangeLog | 72 +++++++
ReleaseNotes | 688 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 760 insertions(+)
diff --git a/ChangeLog b/ChangeLog
index e080d99..155f133 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,78 @@
Changes in version 0.3.0.1-alpha - 2016-??-??
+Changes in version 0.2.8.12 - 2016-12-19
+ Tor 0.2.8.12 backports a fix for a medium-severity issue (bug 21018
+ below) where Tor clients could crash when attempting to visit a
+ hostile hidden service. Clients are recommended to upgrade as packages
+ become available for their systems.
+
+ It also includes an updated list of fallback directories, backported
+ from 0.2.9.
+
+ Now that the Tor 0.2.9 series is stable, only major bugfixes will be
+ backported to 0.2.8 in the future.
+
+ o Major bugfixes (parsing, security, backported from 0.2.9.8):
+ - Fix a bug in parsing that could cause clients to read a single
+ byte past the end of an allocated region. This bug could be used
+ to cause hardened clients (built with --enable-expensive-hardening)
+ to crash if they tried to visit a hostile hidden service. Non-
+ hardened clients are only affected depending on the details of
+ their platform's memory allocator. Fixes bug 21018; bugfix on
+ 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
+ 2016-12-002 and as CVE-2016-1254.
+
+ o Minor features (fallback directory list, backported from 0.2.9.8):
+ - Replace the 81 remaining fallbacks of the 100 originally
+ introduced in Tor 0.2.8.3-alpha in March 2016, with a list of 177
+ fallbacks (123 new, 54 existing, 27 removed) generated in December
+ 2016. Resolves ticket 20170.
+
+ o Minor features (geoip, backported from 0.2.9.7-rc):
+ - Update geoip and geoip6 to the December 7 2016 Maxmind GeoLite2
+ Country database.
+
+
+Changes in version 0.2.9.8 - 2016-12-19
+ Tor 0.2.9.8 is the first stable release of the Tor 0.2.9 series.
+
+ The Tor 0.2.9 series makes mandatory a number of security features
+ that were formerly optional. It includes support for a new shared-
+ randomness protocol that will form the basis for next generation
+ hidden services, includes a single-hop hidden service mode for
+ optimizing .onion services that don't actually want to be hidden,
+ tries harder not to overload the directory authorities with excessive
+ downloads, and supports a better protocol versioning scheme for
+ improved compatibility with other implementations of the Tor protocol.
+
+ And of course, there are numerous other bugfixes and improvements.
+
+ This release also includes a fix for a medium-severity issue (bug
+ 21018 below) where Tor clients could crash when attempting to visit a
+ hostile hidden service. Clients are recommended to upgrade as packages
+ become available for their systems.
+
+ Below are the changes since 0.2.9.7-rc. For a list of all changes
+ since 0.2.8, see the ReleaseNotes file.
+
+ o Major bugfixes (parsing, security):
+ - Fix a bug in parsing that could cause clients to read a single
+ byte past the end of an allocated region. This bug could be used
+ to cause hardened clients (built with --enable-expensive-hardening)
+ to crash if they tried to visit a hostile hidden service. Non-
+ hardened clients are only affected depending on the details of
+ their platform's memory allocator. Fixes bug 21018; bugfix on
+ 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
+ 2016-12-002 and as CVE-2016-1254.
+
+ o Minor features (fallback directory list):
+ - Replace the 81 remaining fallbacks of the 100 originally
+ introduced in Tor 0.2.8.3-alpha in March 2016, with a list of 177
+ fallbacks (123 new, 54 existing, 27 removed) generated in December
+ 2016. Resolves ticket 20170.
+
+
Changes in version 0.2.9.7-rc - 2016-12-12
Tor 0.2.9.7-rc fixes a few small bugs remaining in Tor 0.2.9.6-rc,
including a few that had prevented tests from passing on
diff --git a/ReleaseNotes b/ReleaseNotes
index 97db5af..96c2235 100644
--- a/ReleaseNotes
+++ b/ReleaseNotes
@@ -3,6 +3,694 @@ of Tor. If you want to see more detailed descriptions of the changes in
each development snapshot, see the ChangeLog file.
+Changes in version 0.2.8.12 - 2016-12-19
+ Tor 0.2.8.12 backports a fix for a medium-severity issue (bug 21018
+ below) where Tor clients could crash when attempting to visit a
+ hostile hidden service. Clients are recommended to upgrade as packages
+ become available for their systems.
+
+ It also includes an updated list of fallback directories, backported
+ from 0.2.9.
+
+ Now that the Tor 0.2.9 series is stable, only major bugfixes will be
+ backported to 0.2.8 in the future.
+
+ o Major bugfixes (parsing, security, backported from 0.2.9.8):
+ - Fix a bug in parsing that could cause clients to read a single
+ byte past the end of an allocated region. This bug could be used
+ to cause hardened clients (built with --enable-expensive-hardening)
+ to crash if they tried to visit a hostile hidden service. Non-
+ hardened clients are only affected depending on the details of
+ their platform's memory allocator. Fixes bug 21018; bugfix on
+ 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
+ 2016-12-002 and as CVE-2016-1254.
+
+ o Minor features (fallback directory list, backported from 0.2.9.8):
+ - Replace the 81 remaining fallbacks of the 100 originally
+ introduced in Tor 0.2.8.3-alpha in March 2016, with a list of 177
+ fallbacks (123 new, 54 existing, 27 removed) generated in December
+ 2016. Resolves ticket 20170.
+
+ o Minor features (geoip, backported from 0.2.9.7-rc):
+ - Update geoip and geoip6 to the December 7 2016 Maxmind GeoLite2
+ Country database.
+
+
+Changes in version 0.2.9.8 - 2016-12-19
+ Tor 0.2.9.8 is the first stable release of the Tor 0.2.9 series.
+
+ The Tor 0.2.9 series makes mandatory a number of security features
+ that were formerly optional. It includes support for a new shared-
+ randomness protocol that will form the basis for next generation
+ hidden services, includes a single-hop hidden service mode for
+ optimizing .onion services that don't actually want to be hidden,
+ tries harder not to overload the directory authorities with excessive
+ downloads, and supports a better protocol versioning scheme for
+ improved compatibility with other implementations of the Tor protocol.
+
+ And of course, there are numerous other bugfixes and improvements.
+
+ This release also includes a fix for a medium-severity issue (bug
+ 21018 below) where Tor clients could crash when attempting to visit a
+ hostile hidden service. Clients are recommended to upgrade as packages
+ become available for their systems.
+
+ Below are listed the changes since Tor 0.2.8.11. For a list of
+ changes since 0.2.9.7-rc, see the ChangeLog file.
+
+ o New system requirements:
+ - When building with OpenSSL, Tor now requires version 1.0.1 or
+ later. OpenSSL 1.0.0 and earlier are no longer supported by the
+ OpenSSL team, and should not be used. Closes ticket 20303.
+ - Tor now requires Libevent version 2.0.10-stable or later. Older
+ versions of Libevent have less efficient backends for several
+ platforms, and lack the DNS code that we use for our server-side
+ DNS support. This implements ticket 19554.
+ - Tor now requires zlib version 1.2 or later, for security,
+ efficiency, and (eventually) gzip support. (Back when we started,
+ zlib 1.1 and zlib 1.0 were still found in the wild. 1.2 was
+ released in 2003. We recommend the latest version.)
+
+ o Deprecated features:
+ - A number of DNS-cache-related sub-options for client ports are now
+ deprecated for security reasons, and may be removed in a future
+ version of Tor. (We believe that client-side DNS caching is a bad
+ idea for anonymity, and you should not turn it on.) The options
+ are: CacheDNS, CacheIPv4DNS, CacheIPv6DNS, UseDNSCache,
+ UseIPv4Cache, and UseIPv6Cache.
+ - A number of options are deprecated for security reasons, and may
+ be removed in a future version of Tor. The options are:
+ AllowDotExit, AllowInvalidNodes, AllowSingleHopCircuits,
+ AllowSingleHopExits, ClientDNSRejectInternalAddresses,
+ CloseHSClientCircuitsImmediatelyOnTimeout,
+ CloseHSServiceRendCircuitsImmediatelyOnTimeout,
+ ExcludeSingleHopRelays, FastFirstHopPK, TLSECGroup,
+ UseNTorHandshake, and WarnUnsafeSocks.
+ - The *ListenAddress options are now deprecated as unnecessary: the
+ corresponding *Port options should be used instead. These options
+ may someday be removed. The affected options are:
+ ControlListenAddress, DNSListenAddress, DirListenAddress,
+ NATDListenAddress, ORListenAddress, SocksListenAddress,
+ and TransListenAddress.
+
+ o Major bugfixes (parsing, security, new since 0.2.9.7-rc):
+ - Fix a bug in parsing that could cause clients to read a single
+ byte past the end of an allocated region. This bug could be used
+ to cause hardened clients (built with --enable-expensive-hardening)
+ to crash if they tried to visit a hostile hidden service. Non-
+ hardened clients are only affected depending on the details of
+ their platform's memory allocator. Fixes bug 21018; bugfix on
+ 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
+ 2016-12-002 and as CVE-2016-1254.
+
+ o Major features (build, hardening):
+ - Tor now builds with -ftrapv by default on compilers that support
+ it. This option detects signed integer overflow (which C forbids),
+ and turns it into a hard-failure. We do not apply this option to
+ code that needs to run in constant time to avoid side-channels;
+ instead, we use -fwrapv in that code. Closes ticket 17983.
+ - When --enable-expensive-hardening is selected, stop applying the
+ clang/gcc sanitizers to code that needs to run in constant time.
+ Although we are aware of no introduced side-channels, we are not
+ able to prove that there are none. Related to ticket 17983.
+
+ o Major features (circuit building, security):
+ - Authorities, relays, and clients now require ntor keys in all
+ descriptors, for all hops (except for rare hidden service protocol
+ cases), for all circuits, and for all other roles. Part of
+ ticket 19163.
+ - Authorities, relays, and clients only use ntor, except for
+ rare cases in the hidden service protocol. Part of ticket 19163.
+
+ o Major features (compilation):
+ - Our big list of extra GCC warnings is now enabled by default when
+ building with GCC (or with anything like Clang that claims to be
+ GCC-compatible). To make all warnings into fatal compilation
+ errors, pass --enable-fatal-warnings to configure. Closes
+ ticket 19044.
+ - Use the Autoconf macro AC_USE_SYSTEM_EXTENSIONS to automatically
+ turn on C and POSIX extensions. (Previously, we attempted to do
+ this on an ad hoc basis.) Closes ticket 19139.
+
+ o Major features (directory authorities, hidden services):
+ - Directory authorities can now perform the shared randomness
+ protocol specified by proposal 250. Using this protocol, directory
+ authorities generate a global fresh random value every day. In the
+ future, this value will be used by hidden services to select
+ HSDirs. This release implements the directory authority feature;
+ the hidden service side will be implemented in the future as part
+ of proposal 224. Resolves ticket 16943; implements proposal 250.
+
+ o Major features (downloading, random exponential backoff):
+ - When we fail to download an object from a directory service, wait
+ for an (exponentially increasing) randomized amount of time before
+ retrying, rather than a fixed interval as we did before. This
+ prevents a group of Tor instances from becoming too synchronized,
+ or a single Tor instance from becoming too predictable, in its
+ download schedule. Closes ticket 15942.
+
+ o Major features (resource management):
+ - Tor can now notice it is about to run out of sockets, and
+ preemptively close connections of lower priority. (This feature is
+ off by default for now, since the current prioritizing method is
+ yet not mature enough. You can enable it by setting
+ "DisableOOSCheck 0", but watch out: it might close some sockets
+ you would rather have it keep.) Closes ticket 18640.
+
+ o Major features (single-hop "hidden" services):
+ - Add experimental HiddenServiceSingleHopMode and
+ HiddenServiceNonAnonymousMode options. When both are set to 1,
+ every hidden service on that Tor instance becomes a non-anonymous
+ Single Onion Service. Single Onions make one-hop (direct)
+ connections to their introduction and rendezvous points. One-hop
+ circuits make Single Onion servers easily locatable, but clients
+ remain location-anonymous. This is compatible with the existing
+ hidden service implementation, and works on the current Tor
+ network without any changes to older relays or clients. Implements
+ proposal 260, completes ticket 17178. Patch by teor and asn.
+
+ o Major features (subprotocol versions):
+ - Tor directory authorities now vote on a set of recommended
+ "subprotocol versions", and on a set of required subprotocol
+ versions. Clients and relays that lack support for a _required_
+ subprotocol version will not start; those that lack support for a
+ _recommended_ subprotocol version will warn the user to upgrade.
+ This change allows compatible implementations of the Tor protocol(s)
+ to exist without pretending to be 100% bug-compatible with
+ particular releases of Tor itself. Closes ticket 19958; implements
+ part of proposal 264.
+
+ o Major bugfixes (circuit building):
+ - Hidden service client-to-intro-point and service-to-rendezvous-
+ point circuits use the TAP key supplied by the protocol, to avoid
+ epistemic attacks. Fixes bug 19163; bugfix on 0.2.4.18-rc.
+
+ o Major bugfixes (download scheduling):
+ - Avoid resetting download status for consensuses hourly, since we
+ already have another, smarter retry mechanism. Fixes bug 8625;
+ bugfix on 0.2.0.9-alpha.
+ - If a consensus expires while we are waiting for certificates to
+ download, stop waiting for certificates.
+ - If we stop waiting for certificates less than a minute after we
+ started downloading them, do not consider the certificate download
+ failure a separate failure. Fixes bug 20533; bugfix
+ on 0.2.0.9-alpha.
+ - When using exponential backoff in test networks, use a lower
+ exponent, so the delays do not vary as much. This helps test
+ networks bootstrap consistently. Fixes bug 20597; bugfix on 20499.
+
+ o Major bugfixes (exit policies):
+ - Avoid disclosing exit outbound bind addresses, configured port
+ bind addresses, and local interface addresses in relay descriptors
+ by default under ExitPolicyRejectPrivate. Instead, only reject
+ these (otherwise unlisted) addresses if
+ ExitPolicyRejectLocalInterfaces is set. Fixes bug 18456; bugfix on
+ 0.2.7.2-alpha. Patch by teor.
+
+ o Major bugfixes (hidden services):
+ - Allow Tor clients with appropriate controllers to work with
+ FetchHidServDescriptors set to 0. Previously, this option also
+ disabled descriptor cache lookup, thus breaking hidden services
+ entirely. Fixes bug 18704; bugfix on 0.2.0.20-rc. Patch by "twim".
+ - Clients now require hidden services to include the TAP keys for
+ their intro points in the hidden service descriptor. This prevents
+ an inadvertent upgrade to ntor, which a malicious hidden service
+ could use to distinguish clients by consensus version. Fixes bug
+ 20012; bugfix on 0.2.4.8-alpha. Patch by teor.
+
+ o Major bugfixes (relay, resolver, logging):
+ - For relays that don't know their own address, avoid attempting a
+ local hostname resolve for each descriptor we download. This
+ will cut down on the number of "Success: chose address 'x.x.x.x'"
+ log lines, and also avoid confusing clock jumps if the resolver
+ is slow. Fixes bugs 20423 and 20610; bugfix on 0.2.8.1-alpha.
+
+ o Minor features (port flags):
+ - Add new flags to the *Port options to give finer control over which
+ requests are allowed. The flags are NoDNSRequest, NoOnionTraffic,
+ and the synthetic flag OnionTrafficOnly, which is equivalent to
+ NoDNSRequest, NoIPv4Traffic, and NoIPv6Traffic. Closes enhancement
+ 18693; patch by "teor".
+
+ o Minor features (build, hardening):
+ - Detect and work around a libclang_rt problem that would prevent
+ clang from finding __mulodi4() on some 32-bit platforms, and thus
+ keep -ftrapv from linking on those systems. Closes ticket 19079.
+ - When building on a system without runtime support for the runtime
+ hardening options, try to log a useful warning at configuration
+ time, rather than an incomprehensible warning at link time. If
+ expensive hardening was requested, this warning becomes an error.
+ Closes ticket 18895.
+
+ o Minor features (client, directory):
+ - Since authorities now omit all routers that lack the Running and
+ Valid flags, we assume that any relay listed in the consensus must
+ have those flags. Closes ticket 20001; implements part of
+ proposal 272.
+
+ o Minor features (code safety):
+ - In our integer-parsing functions, ensure that the maximum value we
+ allow is no smaller than the minimum value. Closes ticket 19063;
+ patch from "U+039b".
+
+ o Minor features (compilation, portability):
+ - Compile correctly on MacOS 10.12 (aka "Sierra"). Closes
+ ticket 20241.
+
+ o Minor features (config):
+ - Warn users when descriptor and port addresses are inconsistent.
+ Mitigates bug 13953; patch by teor.
+
+ o Minor features (controller):
+ - Allow controllers to configure basic client authorization on
+ hidden services when they create them with the ADD_ONION controller
+ command. Implements ticket 15588. Patch by "special".
+ - Fire a STATUS_SERVER controller event whenever the hibernation
+ status changes between "awake"/"soft"/"hard". Closes ticket 18685.
+ - Implement new GETINFO queries for all downloads that use
+ download_status_t to schedule retries. This allows controllers to
+ examine the schedule for pending downloads. Closes ticket 19323.
+
+ o Minor features (development tools, etags):
+ - Teach the "make tags" Makefile target how to correctly find
+ "MOCK_IMPL" function definitions. Patch from nherring; closes
+ ticket 16869.
+
+ o Minor features (directory authority):
+ - After voting, if the authorities decide that a relay is not
+ "Valid", they no longer include it in the consensus at all. Closes
+ ticket 20002; implements part of proposal 272.
+ - Directory authorities now only give the Guard flag to a relay if
+ they are also giving it the Stable flag. This change allows us to
+ simplify path selection for clients. It should have minimal effect
+ in practice, since >99% of Guards already have the Stable flag.
+ Implements ticket 18624.
+ - Directory authorities now write their v3-status-votes file out to
+ disk earlier in the consensus process, so we have a record of the
+ votes even if we abort the consensus process. Resolves
+ ticket 19036.
+
+ o Minor features (fallback directory list, new since 0.2.9.7-rc):
+ - Replace the 81 remaining fallbacks of the 100 originally
+ introduced in Tor 0.2.8.3-alpha in March 2016, with a list of 177
+ fallbacks (123 new, 54 existing, 27 removed) generated in December
+ 2016. Resolves ticket 20170.
+
+ o Minor features (hidden service):
+ - Stop being so strict about the payload length of "rendezvous1"
+ cells. We used to be locked in to the "TAP" handshake length, and
+ now we can handle better handshakes like "ntor". Resolves
+ ticket 18998.
+
+ o Minor features (infrastructure, time):
+ - Tor now includes an improved timer backend, so that we can
+ efficiently support tens or hundreds of thousands of concurrent
+ timers, as will be needed for some of our planned anti-traffic-
+ analysis work. This code is based on William Ahern's "timeout.c"
+ project, which implements a "tickless hierarchical timing wheel".
+ Closes ticket 18365.
+ - Tor now uses the operating system's monotonic timers (where
+ available) for internal fine-grained timing. Previously we would
+ look at the system clock, and then attempt to compensate for the
+ clock running backwards. Closes ticket 18908.
+
+ o Minor features (logging):
+ - Add a set of macros to check nonfatal assertions, for internal
+ use. Migrating more of our checks to these should help us avoid
+ needless crash bugs. Closes ticket 18613.
+ - Provide a more useful warning message when configured with an
+ invalid Nickname. Closes ticket 18300; patch from "icanhasaccount".
+ - When dumping unparseable router descriptors, optionally store them
+ in separate files, named by digest, up to a configurable size
+ limit. You can change the size limit by setting the
+ MaxUnparseableDescSizeToLog option, and disable this feature by
+ setting that option to 0. Closes ticket 18322.
+
+ o Minor features (performance):
+ - Change the "optimistic data" extension from "off by default" to
+ "on by default". The default was ordinarily overridden by a
+ consensus option, but when clients were bootstrapping for the
+ first time, they would not have a consensus to get the option
+ from. Changing this default saves a round-trip during startup.
+ Closes ticket 18815.
+
+ o Minor features (relay, usability):
+ - When the directory authorities refuse a bad relay's descriptor,
+ encourage the relay operator to contact us. Many relay operators
+ won't notice this line in their logs, but it's a win if even a few
+ learn why we don't like what their relay was doing. Resolves
+ ticket 18760.
+
+ o Minor features (security, TLS):
+ - Servers no longer support clients that lack AES ciphersuites.
+ (3DES is no longer considered an acceptable cipher.) We believe
+ that no such Tor clients currently exist, since Tor has required
+ OpenSSL 0.9.7 or later since 2009. Closes ticket 19998.
+
+ o Minor features (testing):
+ - Disable memory protections on OpenBSD when performing our unit
+ tests for memwipe(). The test deliberately invokes undefined
+ behavior, and the OpenBSD protections interfere with this. Patch
+ from "rubiate". Closes ticket 20066.
+ - Move the test-network.sh script to chutney, and modify tor's test-
+ network.sh to call the (newer) chutney version when available.
+ Resolves ticket 19116. Patch by teor.
+ - Use the lcov convention for marking lines as unreachable, so that
+ we don't count them when we're generating test coverage data.
+ Update our coverage tools to understand this convention. Closes
+ ticket 16792.
+ - Our link-handshake unit tests now check that when invalid
+ handshakes fail, they fail with the error messages we expected.
+ - Our unit testing code that captures log messages no longer
+ prevents them from being written out if the user asked for them
+ (by passing --debug or --info or --notice or --warn to the "test"
+ binary). This change prevents us from missing unexpected log
+ messages simply because we were looking for others. Related to
+ ticket 19999.
+ - The unit tests now log all warning messages with the "BUG" flag.
+ Previously, they only logged errors by default. This change will
+ help us make our testing code more correct, and make sure that we
+ only hit this code when we mean to. In the meantime, however,
+ there will be more warnings in the unit test logs than before.
+ This is preparatory work for ticket 19999.
+ - The unit tests now treat any failure of a "tor_assert_nonfatal()"
+ assertion as a test failure.
+ - We've done significant work to make the unit tests run faster.
+
+ o Minor features (testing, ipv6):
+ - Add the hs-ipv6 chutney target to make test-network-all's IPv6
+ tests. Remove bridges+hs, as it's somewhat redundant. This
+ requires a recent chutney version that supports IPv6 clients,
+ relays, and authorities. Closes ticket 20069; patch by teor.
+ - Add the single-onion and single-onion-ipv6 chutney targets to
+ "make test-network-all". This requires a recent chutney version
+ with the single onion network flavors (git c72a652 or later).
+ Closes ticket 20072; patch by teor.
+
+ o Minor features (Tor2web):
+ - Make Tor2web clients respect ReachableAddresses. This feature was
+ inadvertently enabled in 0.2.8.6, then removed by bugfix 19973 on
+ 0.2.8.7. Implements feature 20034. Patch by teor.
+
+ o Minor features (unix domain sockets):
+ - When configuring a unix domain socket for a SocksPort,
+ ControlPort, or Hidden service, you can now wrap the address in
+ quotes, using C-style escapes inside the quotes. This allows unix
+ domain socket paths to contain spaces. Resolves ticket 18753.
+
+ o Minor features (user interface):
+ - Tor now supports the ability to declare options deprecated, so
+ that we can recommend that people stop using them. Previously, this
+ was done in an ad-hoc way. There is a new --list-deprecated-options
+ command-line option to list all of the deprecated options. Closes
+ ticket 19820.
+
+ o Minor features (virtual addresses):
+ - Increase the maximum number of bits for the IPv6 virtual network
+ prefix from 16 to 104. In this way, the condition for address
+ allocation is less restrictive. Closes ticket 20151; feature
+ on 0.2.4.7-alpha.
+
+ o Minor bug fixes (circuits):
+ - Use the CircuitBuildTimeout option whenever
+ LearnCircuitBuildTimeout is disabled. Previously, we would respect
+ the option when a user disabled it, but not when it was disabled
+ because some other option was set. Fixes bug 20073; bugfix on
+ 0.2.4.12-alpha. Patch by teor.
+
+ o Minor bugfixes (build):
+ - The current Git revision when building from a local repository is
+ now detected correctly when using git worktrees. Fixes bug 20492;
+ bugfix on 0.2.3.9-alpha.
+
+ o Minor bugfixes (relay address discovery):
+ - Stop reordering IP addresses returned by the OS. This makes it
+ more likely that Tor will guess the same relay IP address every
+ time. Fixes issue 20163; bugfix on 0.2.7.1-alpha, ticket 17027.
+ Reported by René Mayrhofer, patch by "cypherpunks".
+
+ o Minor bugfixes (memory allocation):
+ - Change how we allocate memory for large chunks on buffers, to
+ avoid a (currently impossible) integer overflow, and to waste less
+ space when allocating unusually large chunks. Fixes bug 20081;
+ bugfix on 0.2.0.16-alpha. Issue identified by Guido Vranken.
+
+ o Minor bugfixes (bootstrap):
+ - Remember the directory server we fetched the consensus or previous
+ certificates from, and use it to fetch future authority
+ certificates. This change improves bootstrapping performance.
+ Fixes bug 18963; bugfix on 0.2.8.1-alpha.
+
+ o Minor bugfixes (circuits):
+ - Make sure extend_info_from_router() is only called on servers.
+ Fixes bug 19639; bugfix on 0.2.8.1-alpha.
+
+ o Minor bugfixes (client, fascistfirewall):
+ - Avoid spurious warnings when ReachableAddresses or FascistFirewall
+ is set. Fixes bug 20306; bugfix on 0.2.8.2-alpha.
+
+ o Minor bugfixes (client, unix domain sockets):
+ - Disable IsolateClientAddr when using AF_UNIX backed SocksPorts as
+ the client address is meaningless. Fixes bug 20261; bugfix
+ on 0.2.6.3-alpha.
+
+ o Minor bugfixes (code style):
+ - Fix an integer signedness conversion issue in the case conversion
+ tables. Fixes bug 19168; bugfix on 0.2.1.11-alpha.
+
+ o Minor bugfixes (compilation):
+ - Build correctly on versions of libevent2 without support for
+ evutil_secure_rng_add_bytes(). Fixes bug 19904; bugfix
+ on 0.2.5.4-alpha.
+ - When building with Clang, use a full set of GCC warnings.
+ (Previously, we included only a subset, because of the way we
+ detected them.) Fixes bug 19216; bugfix on 0.2.0.1-alpha.
+ - Detect Libevent2 functions correctly on systems that provide
+ libevent2, but where libevent1 is linked with -levent. Fixes bug
+ 19904; bugfix on 0.2.2.24-alpha. Patch from Rubiate.
+ - Run correctly when built on Windows build environments that
+ require _vcsprintf(). Fixes bug 20560; bugfix on 0.2.2.11-alpha.
+
+ o Minor bugfixes (configuration):
+ - When parsing quoted configuration values from the torrc file,
+ handle Windows line endings correctly. Fixes bug 19167; bugfix on
+ 0.2.0.16-alpha. Patch from "Pingl".
+
+ o Minor bugfixes (directory authority):
+ - Authorities now sort the "package" lines in their votes, for ease
+ of debugging. (They are already sorted in consensus documents.)
+ Fixes bug 18840; bugfix on 0.2.6.3-alpha.
+ - Die with a more useful error when the operator forgets to place
+ the authority_signing_key file into the keys directory. This
+ avoids an uninformative assert & traceback about having an invalid
+ key. Fixes bug 20065; bugfix on 0.2.0.1-alpha.
+ - When allowing private addresses, mark Exits that only exit to
+ private locations as such. Fixes bug 20064; bugfix
+ on 0.2.2.9-alpha.
+ - When parsing a detached signature, make sure we use the length of
+ the digest algorithm instead of a hardcoded DIGEST256_LEN in
+ order to avoid comparing bytes out-of-bounds with a smaller digest
+ length such as SHA1. Fixes bug 19066; bugfix on 0.2.2.6-alpha.
+
+ o Minor bugfixes (getpass):
+ - Defensively fix a non-triggerable heap corruption at do_getpass()
+ to protect ourselves from mistakes in the future. Fixes bug
+ 19223; bugfix on 0.2.7.3-rc. Bug found by Guido Vranken, patch
+ by nherring.
+
+ o Minor bugfixes (guard selection):
+ - Don't mark guards as unreachable if connection_connect() fails.
+ That function fails for local reasons, so it shouldn't reveal
+ anything about the status of the guard. Fixes bug 14334; bugfix
+ on 0.2.3.10-alpha.
+ - Use a single entry guard even if the NumEntryGuards consensus
+ parameter is not provided. Fixes bug 17688; bugfix
+ on 0.2.5.6-alpha.
+
+ o Minor bugfixes (hidden services):
+ - Increase the minimum number of internal circuits we preemptively
+ build from 2 to 3, so a circuit is available when a client
+ connects to another onion service. Fixes bug 13239; bugfix
+ on 0.1.0.1-rc.
+ - Allow hidden services to run on IPv6 addresses even when the
+ IPv6Exit option is not set. Fixes bug 18357; bugfix
+ on 0.2.4.7-alpha.
+ - Stop logging intro point details to the client log on certain
+ error conditions. Fixed as part of bug 20012; bugfix on
+ 0.2.4.8-alpha. Patch by teor.
+ - When deleting an ephemeral hidden service, close its intro points
+ even if they are not completely open. Fixes bug 18604; bugfix
+ on 0.2.7.1-alpha.
+ - When configuring hidden services, check every hidden service
+ directory's permissions. Previously, we only checked the last
+ hidden service. Fixes bug 20529; bugfix on 0.2.6.2-alpha.
+
+ o Minor bugfixes (IPv6, testing):
+ - Check for IPv6 correctly on Linux when running test networks.
+ Fixes bug 19905; bugfix on 0.2.7.3-rc; patch by teor.
+
+ o Minor bugfixes (Linux seccomp2 sandbox):
+ - Add permission to run the sched_yield() and sigaltstack() system
+ calls, in order to support versions of Tor compiled with asan or
+ ubsan code that use these calls. Now "sandbox 1" and
+ "--enable-expensive-hardening" should be compatible on more
+ systems. Fixes bug 20063; bugfix on 0.2.5.1-alpha.
+
+ o Minor bugfixes (logging):
+ - Downgrade a harmless log message about the
+ pending_entry_connections list from "warn" to "info". Mitigates
+ bug 19926.
+ - Log a more accurate message when we fail to dump a microdescriptor.
+ Fixes bug 17758; bugfix on 0.2.2.8-alpha. Patch from Daniel Pinto.
+ - When logging a directory ownership mismatch, log the owning
+ username correctly. Fixes bug 19578; bugfix on 0.2.2.29-beta.
+ - When we are unable to remove the bw_accounting file, do not warn
+ if the reason we couldn't remove it was that it didn't exist.
+ Fixes bug 19964; bugfix on 0.2.5.4-alpha. Patch from pastly.
+
+ o Minor bugfixes (memory leak):
+ - Fix a series of slow memory leaks related to parsing torrc files
+ and options. Fixes bug 19466; bugfix on 0.2.1.6-alpha.
+ - Avoid a small memory leak when informing worker threads about
+ rotated onion keys. Fixes bug 20401; bugfix on 0.2.6.3-alpha.
+ - Fix a small memory leak when receiving AF_UNIX connections on a
+ SocksPort. Fixes bug 20716; bugfix on 0.2.6.3-alpha.
+ - When moving a signed descriptor object from a source to an
+ existing destination, free the allocated memory inside that
+ destination object. Fixes bug 20715; bugfix on 0.2.8.3-alpha.
+ - Fix a memory leak and use-after-free error when removing entries
+ from the sandbox's getaddrinfo() cache. Fixes bug 20710; bugfix on
+ 0.2.5.5-alpha. Patch from "cypherpunks".
+ - Fix a small, uncommon memory leak that could occur when reading a
+ truncated ed25519 key file. Fixes bug 18956; bugfix
+ on 0.2.6.1-alpha.
+
+ o Minor bugfixes (option parsing):
+ - Count unix sockets when counting client listeners (SOCKS, Trans,
+ NATD, and DNS). This has no user-visible behavior changes: these
+ options are set once, and never read. Required for correct
+ behavior in ticket 17178. Fixes bug 19677; bugfix on
+ 0.2.6.3-alpha. Patch by teor.
+
+ o Minor bugfixes (options):
+ - Check the consistency of UseEntryGuards and EntryNodes more
+ reliably. Fixes bug 20074; bugfix on 0.2.4.12-alpha. Patch
+ by teor.
+ - Stop changing the configured value of UseEntryGuards on
+ authorities and Tor2web clients. Fixes bug 20074; bugfix on
+ commits 51fc6799 in 0.1.1.16-rc and acda1735 in 0.2.4.3-alpha.
+ Patch by teor.
+
+ o Minor bugfixes (relay):
+ - Ensure relays don't make multiple connections during bootstrap.
+ Fixes bug 20591; bugfix on 0.2.8.1-alpha.
+ - Do not try to parallelize workers more than 16x without the user
+ explicitly configuring us to do so, even if we do detect more than
+ 16 CPU cores. Fixes bug 19968; bugfix on 0.2.3.1-alpha.
+
+ o Minor bugfixes (testing):
+ - The test-stem and test-network makefile targets now depend only on
+ the tor binary that they are testing. Previously, they depended on
+ "make all". Fixes bug 18240; bugfix on 0.2.8.2-alpha. Based on a
+ patch from "cypherpunks".
+ - Allow clients to retry HSDirs much faster in test networks. Fixes
+ bug 19702; bugfix on 0.2.7.1-alpha. Patch by teor.
+ - Avoid a unit test failure on systems with over 16 detectable CPU
+ cores. Fixes bug 19968; bugfix on 0.2.3.1-alpha.
+ - Let backtrace tests work correctly under AddressSanitizer:
+ disable ASAN's detection of segmentation faults while running
+ test_bt.sh, so that we can make sure that our own backtrace
+ generation code works. Fixes bug 18934; bugfix
+ on 0.2.5.2-alpha. Patch from "cypherpunks".
+ - Fix the test-network-all target on out-of-tree builds by using the
+ correct path to the test driver script. Fixes bug 19421; bugfix
+ on 0.2.7.3-rc.
+ - Stop spurious failures in the local interface address discovery
+ unit tests. Fixes bug 20634; bugfix on 0.2.8.1-alpha; patch by
+ Neel Chauhan.
+ - Use ECDHE ciphers instead of ECDH in tortls tests. LibreSSL has
+ removed the ECDH ciphers which caused the tests to fail on
+ platforms which use it. Fixes bug 20460; bugfix on 0.2.8.1-alpha.
+ - The tor_tls_server_info_callback unit test no longer crashes when
+ debug-level logging is turned on. Fixes bug 20041; bugfix
+ on 0.2.8.1-alpha.
+
+ o Minor bugfixes (time):
+ - Improve overflow checks in tv_udiff and tv_mdiff. Fixes bug 19483;
+ bugfix on all released tor versions.
+ - When computing the difference between two times in milliseconds,
+ we now round to the nearest millisecond correctly. Previously, we
+ could sometimes round in the wrong direction. Fixes bug 19428;
+ bugfix on 0.2.2.2-alpha.
+
+ o Minor bugfixes (Tor2web):
+ - Prevent Tor2web clients from running hidden services: these services
+ are not anonymous due to the one-hop client paths. Fixes bug
+ 19678. Patch by teor.
+
+ o Minor bugfixes (user interface):
+ - Display a more accurate number of suppressed messages in the log
+ rate-limiter. Previously, there was a potential integer overflow
+ in the counter. Now, if the number of messages hits a maximum, the
+ rate-limiter doesn't count any further. Fixes bug 19435; bugfix
+ on 0.2.4.11-alpha.
+ - Fix a typo in the passphrase prompt for the ed25519 identity key.
+ Fixes bug 19503; bugfix on 0.2.7.2-alpha.
+
+ o Code simplification and refactoring:
+ - Remove redundant declarations of the MIN macro. Closes
+ ticket 18889.
+ - Rename tor_dup_addr() to tor_addr_to_str_dup() to avoid confusion.
+ Closes ticket 18462; patch from "icanhasaccount".
+ - Split the 600-line directory_handle_command_get function into
+ separate functions for different URL types. Closes ticket 16698.
+
+ o Documentation:
+ - Add module-level internal documentation for 36 C files that
+ previously didn't have a high-level overview. Closes ticket 20385.
+ - Correct the IPv6 syntax in our documentation for the
+ VirtualAddrNetworkIPv6 torrc option. Closes ticket 19743.
+ - Correct the minimum bandwidth value in torrc.sample, and queue a
+ corresponding change for torrc.minimal. Closes ticket 20085.
+ - Fix spelling of "--enable-tor2web-mode" in the manpage. Closes
+ ticket 19153. Patch from "U+039b".
+ - Module-level documentation for several more modules. Closes
+ tickets 19287 and 19290.
+ - Document the --passphrase-fd option in the tor manpage. Fixes bug
+ 19504; bugfix on 0.2.7.3-rc.
+ - Document the default PathsNeededToBuildCircuits value that's used
+ by clients when the directory authorities don't set
+ min_paths_for_circs_pct. Fixes bug 20117; bugfix on 0.2.4.10-alpha.
+ Patch by teor, reported by Jesse V.
+ - Fix manual for the User option: it takes a username, not a UID.
+ Fixes bug 19122; bugfix on 0.0.2pre16 (the first version to have
+ a manpage!).
+ - Fix the description of the --passphrase-fd option in the
+ tor-gencert manpage. The option is used to pass the number of a
+ file descriptor to read the passphrase from, not to read the file
+ descriptor from. Fixes bug 19505; bugfix on 0.2.0.20-alpha.
+
+ o Removed code:
+ - We no longer include the (dead, deprecated) bufferevent code in
+ Tor. Closes ticket 19450. Based on a patch from "U+039b".
+
+ o Removed features:
+ - Remove support for "GET /tor/bytes.txt" DirPort request, and
+ "GETINFO dir-usage" controller request, which were only available
+ via a compile-time option in Tor anyway. Feature was added in
+ 0.2.2.1-alpha. Resolves ticket 19035.
+ - There is no longer a compile-time option to disable support for
+ TransPort. (If you don't want TransPort, just don't use it.) Patch
+ from "U+039b". Closes ticket 19449.
+
+ o Testing:
+ - Run more workqueue tests as part of "make check". These had
+ previously been implemented, but you needed to know special
+ command-line options to enable them.
+ - We now have unit tests for our code to reject zlib "compression
+ bombs". (Fortunately, the code works fine.)
+
+
Changes in version 0.2.8.11 - 2016-12-08
Tor 0.2.8.11 backports fixes for additional portability issues that
could prevent Tor from building correctly on OSX Sierra, or with
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