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December 2019
- 3 participants
- 3 discussions
Hello, everyone!
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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
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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 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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