1 Changes in version 0.4.3.1-alpha - 2020-01-22
2 This is the first alpha release in the 0.4.3.x series. It includes
3 improved support for application integration of onion services, support
4 for building in a client-only mode, and newly improved internal
5 documentation (online at https://src-ref.docs.torproject.org/tor/). It
6 also has numerous other small bugfixes and features, as well as
7 improvements to our code's internal organization that should help us
8 write better code in the future.
10 o New system requirements:
11 - When building Tor, you now need to have Python 3 in order to run
12 the integration tests. (Python 2 is officially unsupported
13 upstream, as of 1 Jan 2020.) Closes ticket 32608.
15 o Major features (build system):
16 - The relay code can now be disabled using the --disable-module-relay
17 configure option. When this option is set, we also disable the
18 dirauth module. Closes ticket 32123.
19 - When Tor is compiled --disable-module-relay, we also omit the code
20 used to act as a directory cache. Closes ticket 32487.
22 o Major features (directory authority, ed25519):
23 - Add support for banning a relay's ed25519 keys in the approved-
24 routers file. This will help us migrate away from RSA keys in the
25 future. Previously, only RSA keys could be banned in approved-
26 routers. Resolves ticket 22029. Patch by Neel Chauhan.
28 o Major features (onion service, controller):
29 - New control port commands to manage client-side onion service
30 authorization credentials. The ONION_CLIENT_AUTH_ADD command adds
31 a credential, ONION_CLIENT_AUTH_REMOVE deletes a credential, and
32 ONION_CLIENT_AUTH_VIEW lists the credentials. Closes ticket 30381.
34 o Major features (onion service, SOCKS5):
35 - Introduce a new SocksPort flag, ExtendedErrors, to support more
36 detailed error codes in information for applications that support
37 them. Closes ticket 30382; implements proposal 304.
39 o Major features (proxy):
40 - In addition to its current supported proxy types (HTTP CONNECT,
41 SOCKS4, and SOCKS5), Tor can now make its OR connections through a
42 HAProxy server. A new torrc option was added to specify the
43 address/port of the server: TCPProxy <protocol> <host>:<port>.
44 Currently the only supported protocol for the option is haproxy.
45 Closes ticket 31518. Patch done by Suphanat Chunhapanya (haxxpop).
47 o Major bugfixes (linux seccomp sandbox):
48 - Correct how we use libseccomp. Particularly, stop assuming that
49 rules are applied in a particular order or that more rules are
50 processed after the first match. Neither is the case! In
51 libseccomp <2.4.0 this lead to some rules having no effect.
52 libseccomp 2.4.0 changed how rules are generated, leading to a
53 different ordering, which in turn led to a fatal crash during
54 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
56 - Fix crash when reloading logging configuration while the
57 experimental sandbox is enabled. Fixes bug 32841; bugfix on
58 0.4.1.7. Patch by Peter Gerber.
60 o Major bugfixes (networking):
61 - Correctly handle IPv6 addresses in SOCKS5 RESOLVE_PTR requests,
62 and accept strings as well as binary addresses. Fixes bug 32315;
63 bugfix on 0.3.5.1-alpha.
65 o Major bugfixes (onion service):
66 - Report HS circuit failure back into the HS subsystem so we take
67 appropriate action with regards to the client introduction point
68 failure cache. This improves reachability of onion services, since
69 now clients notice failing introduction circuits properly. Fixes
70 bug 32020; bugfix on 0.3.2.1-alpha.
72 o Minor feature (configure, build system):
73 - Output a list of enabled/disabled features at the end of the
74 configure process in a pleasing way. Closes ticket 31373.
76 o Minor feature (heartbeat, onion service):
77 - Add the DoS INTRODUCE2 defenses counter to the heartbeat DoS
78 message. Closes ticket 31371.
80 o Minor features (configuration validation):
81 - Configuration validation can now be done by per-module callbacks,
82 rather than a global validation function. This will let us reduce
83 the size of config.c and some of its more cumbersome functions.
86 o Minor features (configuration):
87 - If a configured hardware crypto accelerator in AccelName is
88 prefixed with "!", Tor now exits when it cannot be found. Closes
90 - We now use flag-driven logic to warn about obsolete configuration
91 fields, so that we can include their names. In 0.4.2, we used a
92 special type, which prevented us from generating good warnings.
93 Implements ticket 32404.
95 o Minor features (controller):
96 - Add stream isolation data to STREAM event. Closes ticket 19859.
97 - Implement a new GETINFO command to fetch microdescriptor
98 consensus. Closes ticket 31684.
100 o Minor features (debugging, directory system):
101 - Don't crash when we find a non-guard with a guard-fraction value
102 set. Instead, log a bug warning, in an attempt to figure out how
103 this happened. Diagnostic for ticket 32868.
105 o Minor features (defense in depth):
106 - Add additional checks around tor_vasprintf() usage, in case the
107 function returns an error. Patch by Tobias Stoeckmann. Fixes
110 o Minor features (developer tooling):
111 - Remove the 0.2.9.x series branches from git scripts (git-merge-
112 forward.sh, git-pull-all.sh, git-push-all.sh, git-setup-dirs.sh).
115 o Minor features (developer tools):
116 - Add a check_cocci_parse.sh script that checks that new code is
117 parseable by Coccinelle. Add an exceptions file for unparseable
118 files, and run the script from travis CI. Closes ticket 31919.
119 - Call the check_cocci_parse.sh script from a 'check-cocci' Makefile
120 target. Closes ticket 31919.
121 - Add a rename_c_identifiers.py tool to rename a bunch of C
122 identifiers at once, and generate a well-formed commit message
123 describing the change. This should help with refactoring. Closes
125 - Add some scripts in "scripts/coccinelle" to invoke the Coccinelle
126 semantic patching tool with the correct flags. These flags are
127 fairly easy to forget, and these scripts should help us use
128 Coccinelle more effectively in the future. Closes ticket 31705.
130 o Minor features (Doxygen):
131 - Update Doxygen configuration file to a more recent template (from
132 1.8.15). Closes ticket 32110.
133 - "make doxygen" now works with out-of-tree builds. Closes
135 - Make sure that doxygen outputs documentation for all of our C
136 files. Previously, some were missing @file declarations, causing
137 them to be ignored. Closes ticket 32307.
138 - Our "make doxygen" target now respects --enable-fatal-warnings by
139 default, and does not warn about items that are missing
140 documentation. To warn about missing documentation, run configure
141 with the "--enable-missing-doc-warnings" flag: doing so suspends
142 fatal warnings for doxygen. Closes ticket 32385.
144 o Minor features (git scripts):
145 - Add TOR_EXTRA_CLONE_ARGS to git-setup-dirs.sh for git clone
146 customisation. Closes ticket 32347.
147 - Add git-setup-dirs.sh, which sets up an upstream git repository
148 and worktrees for tor maintainers. Closes ticket 29603.
149 - Add TOR_EXTRA_REMOTE_* to git-setup-dirs.sh for a custom extra
150 remote. Closes ticket 32347.
151 - Call the check_cocci_parse.sh script from the git commit and push
152 hooks. Closes ticket 31919.
153 - Make git-push-all.sh skip unchanged branches when pushing to
154 upstream. The script already skipped unchanged test branches.
156 - Make git-setup-dirs.sh create a master symlink in the worktree
157 directory. Closes ticket 32347.
158 - Skip unmodified source files when doing some existing git hook
159 checks. Related to ticket 31919.
161 o Minor features (IPv6, client):
162 - Make Tor clients tell dual-stack exits that they prefer IPv6
163 connections. This change is equivalent to setting the PreferIPv6
164 flag on SOCKSPorts (and most other listener ports). Tor Browser
165 has been setting this flag for some time, and we want to remove a
166 client distinguisher at exits. Closes ticket 32637.
168 o Minor features (portability, android):
169 - When building for Android, disable some tests that depend on $HOME
170 and/or pwdb, which Android doesn't have. Closes ticket 32825.
171 Patch from Hans-Christoph Steiner.
173 o Minor features (relay modularity):
174 - Split the relay and server pluggable transport config code into
175 separate files in the relay module. Disable this code when the
176 relay module is disabled. Closes part of ticket 32213.
177 - When the relay module is disabled, reject attempts to set the
178 ORPort, DirPort, DirCache, BridgeRelay, ExtORPort, or
179 ServerTransport* options, rather than ignoring the values of these
180 options. Closes part of ticket 32213.
182 o Minor features (relay):
183 - When the relay module is disabled, change the default config so
184 that DirCache is 0, and ClientOnly is 1. Closes ticket 32410.
186 o Minor features (release tools):
187 - Port our ChangeLog formatting and sorting tools to Python 3.
190 o Minor features (testing):
191 - Detect some common failure cases for test_parseconf.sh in
192 src/test/conf_failures. Closes ticket 32451.
193 - Allow test_parseconf.sh to test expected log outputs for successful
194 configs, as well as failed configs. Closes ticket 32451.
195 - The test_parseconf.sh script now supports result variants for any
196 combination of the optional libraries lzma, nss, and zstd. Closes
199 o Minor features (tests, Android):
200 - When running the unit tests on Android, create temporary files in
201 a subdirectory of /data/local/tmp. Closes ticket 32172. Based on a
202 patch from Hans-Christoph Steiner.
204 o Minor bugfixes (bridges):
205 - Lowercase the configured value of BridgeDistribution before adding
206 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
208 o Minor bugfixes (build system):
209 - Fix "make autostyle" for out-of-tree builds. Fixes bug 32370;
210 bugfix on 0.4.1.2-alpha.
212 o Minor bugfixes (configuration handling):
213 - Make control_event_conf_changed() take in a config_line_t instead
214 of a smartlist of alternating key/value entries. Fixes bug 31531;
215 bugfix on 0.2.3.3-alpha. Patch by Neel Chauhan.
217 o Minor bugfixes (configuration):
218 - Check for multiplication overflow when parsing memory units inside
219 configuration. Fixes bug 30920; bugfix on 0.0.9rc1.
220 - When dumping the configuration, stop adding a trailing space after
221 the option name when there is no option value. This issue only
222 affects options that accept an empty value or list. (Most options
223 reject empty values, or delete the entire line from the dumped
224 options.) Fixes bug 32352; bugfix on 0.0.9pre6.
225 - Avoid changing the user's value of HardwareAccel as stored by
226 SAVECONF, when AccelName is set but HardwareAccel is not. Fixes
227 bug 32382; bugfix on 0.2.2.1-alpha.
228 - When creating a KeyDirectory with the same location as the
229 DataDirectory (not recommended), respect the DataDirectory's
230 group-readable setting if one has not been set for the
231 KeyDirectory. Fixes bug 27992; bugfix on 0.3.3.1-alpha.
233 o Minor bugfixes (controller):
234 - In routerstatus_has_changed(), check all the fields that are
235 output over the control port. Fixes bug 20218; bugfix
238 o Minor bugfixes (correctness checks):
239 - Use GCC/Clang's printf-checking feature to make sure that
240 tor_assertf() arguments are correctly typed. Fixes bug 32765;
241 bugfix on 0.4.1.1-alpha.
243 o Minor bugfixes (developer tools):
244 - Allow paths starting with ./ in scripts/add_c_file.py. Fixes bug
245 31336; bugfix on 0.4.1.2-alpha.
247 o Minor bugfixes (dirauth module):
248 - Split the dirauth config code into a separate file in the dirauth
249 module. Disable this code when the dirauth module is disabled.
251 - When the dirauth module is disabled, reject attempts to set the
252 AuthoritativeDir option, rather than ignoring the value of the
253 option. Fixes bug 32213; bugfix on 0.3.4.1-alpha.
255 o Minor bugfixes (embedded Tor):
256 - When starting Tor any time after the first time in a process,
257 register the thread in which it is running as the main thread.
258 Previously, we only did this on Windows, which could lead to bugs
259 like 23081 on non-Windows platforms. Fixes bug 32884; bugfix
262 o Minor bugfixes (git scripts):
263 - Avoid sleeping before the last push in git-push-all.sh. Closes
265 - Forward all unrecognised arguments in git-push-all.sh to git push.
268 o Minor bugfixes (hidden service v3):
269 - Do not rely on a "circuit established" flag for intro circuits but
270 instead always query the HS circuit map. This is to avoid sync
271 issue with that flag and the map. Fixes bug 32094; bugfix
274 o Minor bugfixes (logging, crash):
275 - Avoid a possible crash when trying to log a (fatal) assertion
276 failure about mismatched magic numbers in configuration objects.
277 Fixes bug 32771; bugfix on 0.4.2.1-alpha.
279 o Minor bugfixes (onion service v2):
280 - When sending the INTRO cell for a v2 Onion Service, look at the
281 failure cache alongside timeout values to check if the intro point
282 is marked as failed. Previously, we only looked at the relay
283 timeout values. Fixes bug 25568; bugfix on 0.2.7.3-rc. Patch by
286 o Minor bugfixes (onion services v3, client):
287 - Properly handle the client rendezvous circuit timeout. Previously
288 Tor would sometimes timeout a rendezvous circuit awaiting the
289 introduction ACK, and find itself unable to re-establish all
290 circuits because the rendezvous circuit timed out too early. Fixes
291 bug 32021; bugfix on 0.3.2.1-alpha.
293 o Minor bugfixes (onion services):
294 - In cancel_descriptor_fetches(), use
295 connection_list_by_type_purpose() instead of
296 connection_list_by_type_state(). Fixes bug 32639; bugfix on
297 0.3.2.1-alpha. Patch by Neel Chauhan.
299 o Minor bugfixes (scripts):
300 - Fix update_versions.py for out-of-tree builds. Fixes bug 32371;
301 bugfix on 0.4.0.1-alpha.
303 o Minor bugfixes (test):
304 - Use the same code to find the tor binary in all of our test
305 scripts. This change makes sure we are always using the coverage
306 binary when coverage is enabled. Fixes bug 32368; bugfix
309 o Minor bugfixes (testing):
310 - Stop ignoring "tor --dump-config" errors in test_parseconf.sh.
311 Fixes bug 32468; bugfix on 0.4.2.1-alpha.
312 - When TOR_DISABLE_PRACTRACKER is set, do not apply it to the
313 test_practracker.sh script. Doing so caused a test failure. Fixes
314 bug 32705; bugfix on 0.4.2.1-alpha.
315 - When TOR_DISABLE_PRACTRACKER is set, log a notice to stderr when
316 skipping practracker checks. Fixes bug 32705; bugfix
319 o Minor bugfixes (tests):
320 - Our option-validation tests no longer depend on specially
321 configured non-default, non-passing sets of options. Previously,
322 the tests had been written to assume that options would _not_ be
323 set to their defaults, which led to needless complexity and
324 verbosity. Fixes bug 32175; bugfix on 0.2.8.1-alpha.
326 o Minor bugfixes (windows service):
327 - Initialize the publish/subscribe system when running as a windows
328 service. Fixes bug 32778; bugfix on 0.4.1.1-alpha.
330 o Deprecated features:
331 - Deprecate the ClientAutoIPv6ORPort option. This option was not
332 true "Happy Eyeballs", and often failed on connections that
333 weren't reliably dual-stack. Closes ticket 32942. Patch by
337 - Provide a quickstart guide for a Circuit Padding Framework, and
338 documentation for researchers to implement and study circuit
339 padding machines. Closes ticket 28804.
340 - Add documentation in 'HelpfulTools.md' to describe how to build a
341 tag file. Closes ticket 32779.
342 - Create a high-level description of the long-term software
343 architecture goals. Closes ticket 32206.
344 - Describe the --dump-config command in the manual page. Closes
346 - Unite coding advice from this_not_that.md in torguts repo into our
347 coding standards document. Resolves ticket 31853.
350 - Our Doxygen configuration no longer generates LaTeX output. The
351 reference manual produced by doing this was over 4000 pages long,
352 and generally unusable. Closes ticket 32099.
353 - The option "TestingEstimatedDescriptorPropagationTime" is now
354 marked as obsolete. It has had no effect since 0.3.0.7, when
355 clients stopped rejecting consensuses "from the future". Closes
357 - We no longer support consensus methods before method 28; these
358 methods were only used by authorities running versions of Tor that
359 are now at end-of-life. In effect, this means that clients,
360 relays, and authorities now assume that authorities will be
361 running version 0.3.5.x or later. Closes ticket 32695.
364 - Add more test cases for tor's UTF-8 validation function. Also,
365 check the arguments passed to the function for consistency. Closes
367 - Improve test coverage for relay and dirauth config code, focusing
368 on option validation and normalization. Closes ticket 32213.
369 - Improve the consistency of test_parseconf.sh output, and run all
370 the tests, even if one fails. Closes ticket 32213.
371 - Re-enable the Travis CI macOS Chutney build, but don't let it
372 prevent the Travis job from finishing. (The Travis macOS jobs are
373 slow, so we don't want to have it delay the whole CI process.)
375 - Run the practracker unit tests in the pre-commit git hook. Closes
377 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
378 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
379 fix the sandbox errors in 32722. Closes ticket 32240.
381 o Code simplification and refactoring (channel):
382 - Channel layer had a variable length cell handler that was not used
383 and thus removed. Closes ticket 32892.
385 o Code simplification and refactoring (configuration):
386 - Immutability is now implemented as a flag on individual
387 configuration options rather than as part of the option-transition
388 checking code. Closes ticket 32344.
389 - Instead of keeping a list of configuration options to check for
390 relative paths, check all the options whose type is "FILENAME".
391 Solves part of ticket 32339.
392 - Our default log (which ordinarily sends NOTICE-level messages to
393 standard output) is now handled in a more logical manner.
394 Previously, we replaced the configured log options if they were
395 empty. Now, we interpret an empty set of log options as meaning
396 "use the default log". Closes ticket 31999.
397 - Remove some unused arguments from the options_validate() function,
398 to simplify our code and tests. Closes ticket 32187.
399 - Simplify the options_validate() code so that it looks at the
400 default options directly, rather than taking default options as an
401 argument. This change lets us simplify its interface. Closes
403 - Use our new configuration architecture to move most authority-
404 related options to the directory authority module. Closes
406 - When parsing the command line, handle options that determine our
407 "quiet level" and our mode of operation (e.g., --dump-config and
408 so on) all in one table. Closes ticket 32003.
410 o Code simplification and refactoring (controller):
411 - Create a new abstraction for formatting control protocol reply
412 lines based on key-value pairs. Refactor some existing control
413 protocol code to take advantage of this. Closes ticket 30984.
414 - Create a helper function that can fetch network status or
415 microdesc consensuses. Closes ticket 31684.
417 o Code simplification and refactoring (dirauth modularization):
418 - Remove the last remaining HAVE_MODULE_DIRAUTH inside a function.
420 - Replace some confusing identifiers in process_descs.c. Closes
422 - Simplify some relay and dirauth config code. Closes ticket 32213.
424 o Code simplification and refactoring (misc):
425 - Make all the structs we declare follow the same naming convention
426 of ending with "_t". Closes ticket 32415.
427 - Move and rename some configuration-related code for clarity.
429 - Our include.am files are now broken up by subdirectory.
430 Previously, src/core/include.am covered all of the subdirectories
431 in "core", "feature", and "app". Closes ticket 32137.
432 - Remove underused NS*() macros from test code: they make our tests
433 more confusing, especially for code-formatting tools. Closes
436 o Code simplification and refactoring (relay modularization):
437 - Disable relay_periodic when the relay module is disabled. Closes
439 - Disable relay_sys when the relay module is disabled. Closes
442 o Code simplification and refactoring (tool support):
443 - Add numerous missing dependencies to our include files, so that
444 they can be included in different reasonable orders and still
445 compile. Addresses part of ticket 32764.
446 - Fix some parts of our code that were difficult for Coccinelle to
447 parse. Related to ticket 31705.
448 - Fix some small issues in our code that prevented automatic
449 formatting tools from working. Addresses part of ticket 32764.
451 o Documentation (manpage):
452 - Alphabetize the Client Options section of the tor manpage. Closes
454 - Alphabetize the General Options section of the tor manpage. Closes
456 - In the tor(1) manpage, reword and improve formatting of the
457 COMMAND-LINE OPTIONS and DESCRIPTION sections. Closes ticket
458 32277. Based on work by Swati Thacker as part of Google Season
460 - In the tor(1) manpage, reword and improve formatting of the FILES,
461 SEE ALSO, and BUGS sections. Closes ticket 32176. Based on work by
462 Swati Thacker as part of Google Season of Docs.
464 o Testing (circuit, EWMA):
465 - Add unit tests for circuitmux and EWMA subsystems. Closes
468 o Testing (continuous integration):
469 - Use zstd in our Travis Linux builds. Closes ticket 32242.
472 Changes in version 0.4.2.5 - 2019-12-09
473 This is the first stable release in the 0.4.2.x series. This series
474 improves reliability and stability, and includes several stability and
475 correctness improvements for onion services. It also fixes many smaller
476 bugs present in previous series.
478 Per our support policy, we will support the 0.4.2.x series for nine
479 months, or until three months after the release of a stable 0.4.3.x:
480 whichever is longer. If you need longer-term support, please stick
481 with 0.3.5.x, which will we plan to support until Feb 2022.
483 Per our support policy, we will support the 0.4.2.x series for nine
484 months, or until three months after the release of a stable 0.4.3.x:
485 whichever is longer. If you need longer-term support, please stick
486 with 0.3.5.x, which will we plan to support until Feb 2022.
488 Below are the changes since 0.4.1.4-rc. For a complete list of changes
489 since 0.4.1.5, see the ReleaseNotes file.
491 o Minor features (geoip):
492 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
493 Country database. Closes ticket 32685.
496 - Require C99 standards-conforming code in Travis CI, but allow GNU
497 gcc extensions. Also activates clang's -Wtypedef-redefinition
498 warnings. Build some jobs with -std=gnu99, and some jobs without.
502 Changes in version 0.4.1.7 - 2019-12-09
503 This release backports several bugfixes to improve stability and
504 correctness. Anyone experiencing build problems or crashes with 0.4.1.6,
505 including all relays relying on AccountingMax, should upgrade.
507 o Major features (directory authorities, backport from 0.4.2.2-alpha):
508 - Directory authorities now reject relays running all currently
509 deprecated release series. The currently supported release series
510 are: 0.2.9, 0.3.5, 0.4.0, 0.4.1, and 0.4.2. Closes ticket 31549.
512 o Major bugfixes (embedded Tor, backport from 0.4.2.2-alpha):
513 - Avoid a possible crash when restarting Tor in embedded mode and
514 enabling a different set of publish/subscribe messages. Fixes bug
515 31898; bugfix on 0.4.1.1-alpha.
517 o Major bugfixes (relay, backport from 0.4.2.3-alpha):
518 - Relays now respect their AccountingMax bandwidth again. When
519 relays entered "soft" hibernation (which typically starts when
520 we've hit 90% of our AccountingMax), we had stopped checking
521 whether we should enter hard hibernation. Soft hibernation refuses
522 new connections and new circuits, but the existing circuits can
523 continue, meaning that relays could have exceeded their configured
524 AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.
526 o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha):
527 - Stop ignoring torrc options after an %include directive, when the
528 included directory ends with a file that does not contain any
529 config options (but does contain comments or whitespace). Fixes
530 bug 31408; bugfix on 0.3.1.1-alpha.
532 o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha):
533 - Onion services now always use the exact number of intro points
534 configured with the HiddenServiceNumIntroductionPoints option (or
535 fewer if nodes are excluded). Before, a service could sometimes
536 pick more intro points than configured. Fixes bug 31548; bugfix
539 o Minor features (continuous integration, backport from 0.4.2.2-alpha):
540 - When building on Appveyor and Travis, pass the "-k" flag to make,
541 so that we are informed of all compilation failures, not just the
542 first one or two. Closes ticket 31372.
544 o Minor features (geoip, backport from 0.4.2.5):
545 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
546 Country database. Closes ticket 32685.
548 o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha):
549 - Avoid spurious errors when Appveyor CI fails before the install step.
550 Fixes bug 31884; bugfix on 0.3.4.2-alpha.
552 o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc):
553 - Fix a BUG() assertion that occurs within a very small race window
554 between when a client intro circuit opens and when its descriptor
555 gets cleaned up from the cache. The circuit is now closed early,
556 which will trigger a re-fetch of the descriptor and continue the
557 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
559 o Minor bugfixes (connections, backport from 0.4.2.3-rc):
560 - Avoid trying to read data from closed connections, which can cause
561 needless loops in Libevent and infinite loops in Shadow. Fixes bug
562 30344; bugfix on 0.1.1.1-alpha.
564 o Minor bugfixes (error handling, backport from 0.4.2.1-alpha):
565 - On abort, try harder to flush the output buffers of log messages.
566 On some platforms (macOS), log messages could be discarded when
567 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
568 - Report the tor version whenever an assertion fails. Previously, we
569 only reported the Tor version on some crashes, and some non-fatal
570 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
571 - When tor aborts due to an error, close log file descriptors before
572 aborting. Closing the logs makes some OSes flush log file buffers,
573 rather than deleting buffered log lines. Fixes bug 31594; bugfix
576 o Minor bugfixes (logging, backport from 0.4.2.2-alpha):
577 - Add a missing check for HAVE_PTHREAD_H, because the backtrace code
578 uses mutexes. Fixes bug 31614; bugfix on 0.2.5.2-alpha.
579 - Disable backtrace signal handlers when shutting down tor. Fixes
580 bug 31614; bugfix on 0.2.5.2-alpha.
581 - Rate-limit our the logging message about the obsolete .exit
582 notation. Previously, there was no limit on this warning, which
583 could potentially be triggered many times by a hostile website.
584 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
586 o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha):
587 - Do not log a nonfatal assertion failure when receiving a VERSIONS
588 cell on a connection using the obsolete v1 link protocol. Log a
589 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
591 o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha):
592 - Reset the periodic events' "enabled" flag when Tor is shut down
593 cleanly. Previously, this flag was left on, which caused periodic
594 events not to be re-enabled when Tor was relaunched in-process
595 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
598 o Minor bugfixes (multithreading, backport from 0.4.2.2-alpha):
599 - Avoid some undefined behaviour when freeing mutexes. Fixes bug
600 31736; bugfix on 0.0.7.
602 o Minor bugfixes (process management, backport from 0.4.2.3-alpha):
603 - Remove overly strict assertions that triggered when a pluggable
604 transport failed to launch. Fixes bug 31091; bugfix
606 - Remove an assertion in the Unix process backend. This assertion
607 would trigger when we failed to find the executable for a child
608 process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.
610 o Minor bugfixes (relay, backport from 0.4.2.2-alpha):
611 - Avoid crashing when starting with a corrupt keys directory where
612 the old ntor key and the new ntor key are identical. Fixes bug
613 30916; bugfix on 0.2.4.8-alpha.
615 o Minor bugfixes (testing, backport from 0.4.2.3-alpha):
616 - When testing port rebinding, don't busy-wait for tor to log.
617 Instead, actually sleep for a short time before polling again.
618 Also improve the formatting of control commands and log messages.
619 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
621 o Minor bugfixes (tests, SunOS, backport from 0.4.2.2-alpha):
622 - Avoid a map_anon_nofork test failure due to a signed/unsigned
623 integer comparison. Fixes bug 31897; bugfix on 0.4.1.1-alpha.
625 o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha):
626 - Log bugs about the TLS read buffer's length only once, rather than
627 filling the logs with similar warnings. Fixes bug 31939; bugfix
630 o Documentation (backport from 0.4.2.2-alpha):
631 - Explain why we can't destroy the backtrace buffer mutex. Explain
632 why we don't need to destroy the log mutex. Closes ticket 31736.
634 o Testing (continuous integration, backport from 0.4.2.3-alpha):
635 - Disable all but one Travis CI macOS build, to mitigate slow
636 scheduling of Travis macOS jobs. Closes ticket 32177.
637 - Run the chutney IPv6 networks as part of Travis CI. Closes
639 - Simplify the Travis CI build matrix, and optimise for build time.
641 - Use Windows Server 2019 instead of Windows Server 2016 in our
642 Appveyor builds. Closes ticket 32086.
644 o Testing (continuous integration, backport from 0.4.2.4-rc):
645 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
646 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
647 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
648 until we can fix some Bionic permissions issues (see ticket
649 32240). Related to ticket 31919.
650 - Install the mingw OpenSSL package in Appveyor. This makes sure
651 that the OpenSSL headers and libraries match in Tor's Appveyor
652 builds. (This bug was triggered by an Appveyor image update.)
653 Fixes bug 32449; bugfix on 0.3.5.6-rc.
655 o Testing (continuous integration, backport from 0.4.2.5):
656 - Require C99 standards-conforming code in Travis CI, but allow GNU gcc
657 extensions. Also activates clang's -Wtypedef-redefinition warnings.
658 Build some jobs with -std=gnu99, and some jobs without.
662 Changes in version 0.4.0.6 - 2019-12-09
663 This is the second stable release in the 0.4.0.x series. This release
664 backports several bugfixes to improve stability and correctness. Anyone
665 experiencing build problems or crashes with 0.4.0.5, including all relays
666 relying on AccountingMax, should upgrade.
668 Note that, per our support policy, support for the 0.4.0.x series will end
669 on 2 Feb 2020. Anyone still running 0.4.0.x should plan to upgrade to the
670 latest stable release, or downgrade to 0.3.5.x, which will get long-term
671 support until 1 Feb 2022.
673 o Directory authority changes (backport from 0.4.1.5):
674 - The directory authority "dizum" has a new IP address. Closes
677 o Major bugfixes (bridges, backport from 0.4.1.2-alpha):
678 - Consider our directory information to have changed when our list
679 of bridges changes. Previously, Tor would not re-compute the
680 status of its directory information when bridges changed, and
681 therefore would not realize that it was no longer able to build
682 circuits. Fixes part of bug 29875.
683 - Do not count previously configured working bridges towards our
684 total of working bridges. Previously, when Tor's list of bridges
685 changed, it would think that the old bridges were still usable,
686 and delay fetching router descriptors for the new ones. Fixes part
687 of bug 29875; bugfix on 0.3.0.1-alpha.
689 o Major bugfixes (circuit build, guard, backport from 0.4.1.4-rc):
690 - When considering upgrading circuits from "waiting for guard" to
691 "open", always ignore circuits that are marked for close. Otherwise,
692 we can end up in the situation where a subsystem is notified that
693 a closing circuit has just opened, leading to undesirable
694 behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha.
696 o Major bugfixes (Onion service reachability, backport from 0.4.1.3-alpha):
697 - Properly clean up the introduction point map when circuits change
698 purpose from onion service circuits to pathbias, measurement, or
699 other circuit types. This should fix some service-side instances
700 of introduction point failure. Fixes bug 29034; bugfix
703 o Major bugfixes (onion service v3, backport from 0.4.1.1-alpha):
704 - Fix an unreachable bug in which an introduction point could try to
705 send an INTRODUCE_ACK with a status code that Trunnel would refuse
706 to encode, leading the relay to assert(). We've consolidated the
707 ABI values into Trunnel now. Fixes bug 30454; bugfix
709 - Clients can now handle unknown status codes from INTRODUCE_ACK
710 cells. (The NACK behavior will stay the same.) This will allow us
711 to extend status codes in the future without breaking the normal
712 client behavior. Fixes another part of bug 30454; bugfix
715 o Major bugfixes (relay, backport from 0.4.2.3-alpha):
716 - Relays now respect their AccountingMax bandwidth again. When
717 relays entered "soft" hibernation (which typically starts when
718 we've hit 90% of our AccountingMax), we had stopped checking
719 whether we should enter hard hibernation. Soft hibernation refuses
720 new connections and new circuits, but the existing circuits can
721 continue, meaning that relays could have exceeded their configured
722 AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.
724 o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha):
725 - Stop ignoring torrc options after an %include directive, when the
726 included directory ends with a file that does not contain any
727 config options (but does contain comments or whitespace). Fixes
728 bug 31408; bugfix on 0.3.1.1-alpha.
730 o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha):
731 - Onion services now always use the exact number of intro points
732 configured with the HiddenServiceNumIntroductionPoints option (or
733 fewer if nodes are excluded). Before, a service could sometimes
734 pick more intro points than configured. Fixes bug 31548; bugfix
737 o Minor features (compile-time modules, backport from version 0.4.1.1-alpha):
738 - Add a "--list-modules" command to print a list of which compile-
739 time modules are enabled. Closes ticket 30452.
741 o Minor features (continuous integration, backport from 0.4.1.1-alpha):
742 - Remove sudo configuration lines from .travis.yml as they are no
743 longer needed with current Travis build environment. Resolves
746 o Minor features (continuous integration, backport from 0.4.1.4-rc):
747 - Our Travis configuration now uses Chutney to run some network
748 integration tests automatically. Closes ticket 29280.
750 o Minor features (continuous integration, backport from 0.4.2.2-alpha):
751 - When building on Appveyor and Travis, pass the "-k" flag to make,
752 so that we are informed of all compilation failures, not just the
753 first one or two. Closes ticket 31372.
755 o Minor features (fallback directory list, backport from 0.4.1.4-rc):
756 - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc
757 in December 2018 (of which ~122 were still functional), with a
758 list of 148 fallbacks (70 new, 78 existing, 79 removed) generated
759 in June 2019. Closes ticket 28795.
761 o Minor features (geoip, backport from 0.4.2.5):
762 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
763 Country database. Closes ticket 32685.
765 o Minor features (stem tests, backport from 0.4.2.1-alpha):
766 - Change "make test-stem" so it only runs the stem tests that use
767 tor. This change makes test-stem faster and more reliable. Closes
770 o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha):
771 - Avoid spurious errors when Appveyor CI fails before the install step.
772 Fixes bug 31884; bugfix on 0.3.4.2-alpha.
774 o Minor bugfixes (build system, backport form 0.4.2.1-alpha):
775 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
776 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
778 o Minor bugfixes (circuit isolation, backport from 0.4.1.3-alpha):
779 - Fix a logic error that prevented the SessionGroup sub-option from
780 being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha.
782 o Minor bugfixes (circuit padding, backport from 0.4.1.4-rc):
783 - On relays, properly check that a padding machine is absent before
784 logging a warning about it being absent. Fixes bug 30649; bugfix
787 o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc):
788 - Fix a BUG() assertion that occurs within a very small race window
789 between when a client intro circuit opens and when its descriptor
790 gets cleaned up from the cache. The circuit is now closed early,
791 which will trigger a re-fetch of the descriptor and continue the
792 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
794 o Minor bugfixes (clock skew detection, backport from 0.4.1.5):
795 - Don't believe clock skew results from NETINFO cells that appear to
796 arrive before we sent the VERSIONS cells they are responding to.
797 Previously, we would accept them up to 3 minutes "in the past".
798 Fixes bug 31343; bugfix on 0.2.4.4-alpha.
800 o Minor bugfixes (compilation warning, backport from 0.4.1.5):
801 - Fix a compilation warning on Windows about casting a function
802 pointer for GetTickCount64(). Fixes bug 31374; bugfix
805 o Minor bugfixes (compilation, backport from 0.4.1.5):
806 - Avoid using labs() on time_t, which can cause compilation warnings
807 on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
809 o Minor bugfixes (compilation, backport from 0.4.2.1-alpha):
810 - Suppress spurious float-conversion warnings from GCC when calling
811 floating-point classifier functions on FreeBSD. Fixes part of bug
812 31687; bugfix on 0.3.1.5-alpha.
814 o Minor bugfixes (compilation, unusual configurations, backport from 0.4.1.1-alpha):
815 - Avoid failures when building with the ALL_BUGS_ARE_FATAL option
816 due to missing declarations of abort(), and prevent other such
817 failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.
819 o Minor bugfixes (configuration, proxies, backport from 0.4.1.2-alpha):
820 - Fix a bug that prevented us from supporting SOCKS5 proxies that
821 want authentication along with configured (but unused!)
822 ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.
824 o Minor bugfixes (connections, backport from 0.4.2.3-rc):
825 - Avoid trying to read data from closed connections, which can cause
826 needless loops in Libevent and infinite loops in Shadow. Fixes bug
827 30344; bugfix on 0.1.1.1-alpha.
829 o Minor bugfixes (continuous integration, backport from 0.4.1.3-alpha):
830 - Allow the test-stem job to fail in Travis, because it sometimes
831 hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha.
832 - Skip test_rebind on macOS in Travis, because it is unreliable on
833 macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
834 - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment
835 variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
837 o Minor bugfixes (crash on exit, backport from 0.4.1.4-rc):
838 - Avoid a set of possible code paths that could try to use freed
839 memory in routerlist_free() while Tor was exiting. Fixes bug
840 31003; bugfix on 0.1.2.2-alpha.
842 o Minor bugfixes (directory authorities, backport from 0.4.1.3-alpha):
843 - Stop crashing after parsing an unknown descriptor purpose
844 annotation. We think this bug can only be triggered by modifying a
845 local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha.
847 o Minor bugfixes (directory authority, backport from 0.4.1.2-alpha):
848 - Move the "bandwidth-file-headers" line in directory authority
849 votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix
852 o Minor bugfixes (error handling, backport from 0.4.2.1-alpha):
853 - On abort, try harder to flush the output buffers of log messages.
854 On some platforms (macOS), log messages could be discarded when
855 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
856 - Report the tor version whenever an assertion fails. Previously, we
857 only reported the Tor version on some crashes, and some non-fatal
858 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
860 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha):
861 - When extracting an IPv6 address from a PF-based proxy, verify that
862 we are actually configured to receive an IPv6 address, and log an
863 internal error if not. Fixes part of bug 31687; bugfix
866 o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
867 - When tor is missing descriptors for some primary entry guards,
868 make the log message less alarming. It's normal for descriptors to
869 expire, as long as tor fetches new ones soon after. Fixes bug
870 31657; bugfix on 0.3.3.1-alpha.
872 o Minor bugfixes (logging, backport from 0.4.1.1-alpha):
873 - Do not log a warning when running with an OpenSSL version other
874 than the one Tor was compiled with, if the two versions should be
875 compatible. Previously, we would warn whenever the version was
876 different. Fixes bug 30190; bugfix on 0.2.4.2-alpha.
878 o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
879 - Change log level of message "Hash of session info was not as
880 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
883 o Minor bugfixes (logging, backport from 0.4.2.2-alpha):
884 - Rate-limit our the logging message about the obsolete .exit
885 notation. Previously, there was no limit on this warning, which
886 could potentially be triggered many times by a hostile website.
887 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
889 o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha):
890 - Do not log a nonfatal assertion failure when receiving a VERSIONS
891 cell on a connection using the obsolete v1 link protocol. Log a
892 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
894 o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha):
895 - Reset the periodic events' "enabled" flag when Tor is shut down
896 cleanly. Previously, this flag was left on, which caused periodic
897 events not to be re-enabled when Tor was relaunched in-process
898 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
901 o Minor bugfixes (memory leak, backport from 0.4.1.1-alpha):
902 - Avoid a minor memory leak that could occur on relays when failing
903 to create a "keys" directory. Fixes bug 30148; bugfix
906 o Minor bugfixes (memory leak, backport from 0.4.1.4-rc):
907 - Fix a trivial memory leak when parsing an invalid value
908 from a download schedule in the configuration. Fixes bug
909 30894; bugfix on 0.3.4.1-alpha.
911 o Minor bugfixes (NetBSD, backport from 0.4.1.2-alpha):
912 - Fix usage of minherit() on NetBSD and other platforms that define
913 MAP_INHERIT_{ZERO,NONE} instead of INHERIT_{ZERO,NONE}. Fixes bug
914 30614; bugfix on 0.4.0.2-alpha. Patch from Taylor Campbell.
916 o Minor bugfixes (onion services, backport from 0.4.1.1-alpha):
917 - Avoid a GCC 9.1.1 warning (and possible crash depending on libc
918 implemenation) when failing to load an onion service client
919 authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha.
921 o Minor bugfixes (out-of-memory handler, backport from 0.4.1.2-alpha):
922 - When purging the DNS cache because of an out-of-memory condition,
923 try purging just the older entries at first. Previously, we would
924 always purge the whole thing. Fixes bug 29617; bugfix
927 o Minor bugfixes (portability, backport from 0.4.1.2-alpha):
928 - Avoid crashing in our tor_vasprintf() implementation on systems
929 that define neither vasprintf() nor _vscprintf(). (This bug has
930 been here long enough that we question whether people are running
931 Tor on such systems, but we're applying the fix out of caution.)
932 Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by
935 o Minor bugfixes (process management, backport from 0.4.2.3-alpha):
936 - Remove overly strict assertions that triggered when a pluggable
937 transport failed to launch. Fixes bug 31091; bugfix
939 - Remove an assertion in the Unix process backend. This assertion
940 would trigger when we failed to find the executable for a child
941 process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.
943 o Minor bugfixes (relay, backport from 0.4.2.2-alpha):
944 - Avoid crashing when starting with a corrupt keys directory where
945 the old ntor key and the new ntor key are identical. Fixes bug
946 30916; bugfix on 0.2.4.8-alpha.
948 o Minor bugfixes (rust, backport from 0.4.2.1-alpha):
949 - Correctly exclude a redundant rust build job in Travis. Fixes bug
950 31463; bugfix on 0.3.5.4-alpha.
952 o Minor bugfixes (testing, backport from 0.4.2.3-alpha):
953 - When testing port rebinding, don't busy-wait for tor to log.
954 Instead, actually sleep for a short time before polling again.
955 Also improve the formatting of control commands and log messages.
956 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
958 o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha):
959 - Log bugs about the TLS read buffer's length only once, rather than
960 filling the logs with similar warnings. Fixes bug 31939; bugfix
963 o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
964 - Always retry v2 single onion service intro and rend circuits with
965 a 3-hop path. Previously, v2 single onion services used a 3-hop
966 path when rendezvous circuits were retried after a remote or
967 delayed failure, but a 1-hop path for immediate retries. Fixes bug
968 23818; bugfix on 0.2.9.3-alpha.
969 - Make v3 single onion services fall back to a 3-hop intro, when all
970 intro points are unreachable via a 1-hop path. Previously, v3
971 single onion services failed when all intro nodes were unreachable
972 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
974 o Documentation (backport from 0.4.2.1-alpha):
975 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
976 notice.html so that operators no longer have to host it
977 themselves. Closes ticket 31089.
979 o Testing (backport from 0.4.1.2-alpha):
980 - Specify torrc paths (with empty files) when launching tor in
981 integration tests; refrain from reading user and system torrcs.
982 Resolves issue 29702.
984 o Testing (continuous integration, backport from 0.4.1.1-alpha):
985 - In Travis, show stem's tor log after failure. Closes ticket 30234.
987 o Testing (continuous integration, backport from 0.4.1.5):
988 - In Travis, make stem log a controller trace to the console, and
989 tail stem's tor log after failure. Closes ticket 30591.
990 - In Travis, only run the stem tests that use a tor binary. Closes
993 o Testing (continuous integration, backport from 0.4.2.3-alpha):
994 - Disable all but one Travis CI macOS build, to mitigate slow
995 scheduling of Travis macOS jobs. Closes ticket 32177.
996 - Run the chutney IPv6 networks as part of Travis CI. Closes
998 - Simplify the Travis CI build matrix, and optimise for build time.
1000 - Use Windows Server 2019 instead of Windows Server 2016 in our
1001 Appveyor builds. Closes ticket 32086.
1003 o Testing (continuous integration, backport from 0.4.2.4-rc):
1004 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
1005 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
1006 until we can fix some Bionic permissions issues (see ticket
1007 32240). Related to ticket 31919.
1008 - Install the mingw OpenSSL package in Appveyor. This makes sure
1009 that the OpenSSL headers and libraries match in Tor's Appveyor
1010 builds. (This bug was triggered by an Appveyor image update.)
1011 Fixes bug 32449; bugfix on 0.3.5.6-rc.
1012 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
1014 o Testing (continuous integration, backport from 0.4.2.5):
1015 - Require C99 standards-conforming code in Travis CI, but allow GNU gcc
1016 extensions. Also activates clang's -Wtypedef-redefinition warnings.
1017 Build some jobs with -std=gnu99, and some jobs without.
1018 Closes ticket 32500.
1020 Changes in version 0.3.5.9 - 2019-12-09
1021 Tor 0.3.5.9 backports serveral fixes from later releases, including
1022 several that affect bridge users, relay stability, onion services,
1025 o Directory authority changes (backport from 0.4.1.5):
1026 - The directory authority "dizum" has a new IP address. Closes
1029 o Major bugfixes (bridges, backport from 0.4.1.2-alpha):
1030 - Consider our directory information to have changed when our list
1031 of bridges changes. Previously, Tor would not re-compute the
1032 status of its directory information when bridges changed, and
1033 therefore would not realize that it was no longer able to build
1034 circuits. Fixes part of bug 29875.
1035 - Do not count previously configured working bridges towards our
1036 total of working bridges. Previously, when Tor's list of bridges
1037 changed, it would think that the old bridges were still usable,
1038 and delay fetching router descriptors for the new ones. Fixes part
1039 of bug 29875; bugfix on 0.3.0.1-alpha.
1041 o Major bugfixes (circuit build, guard, backport from 0.4.1.4-rc):
1042 - When considering upgrading circuits from "waiting for guard" to
1043 "open", always ignore circuits that are marked for close. Otherwise,
1044 we can end up in the situation where a subsystem is notified that
1045 a closing circuit has just opened, leading to undesirable
1046 behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha.
1048 o Major bugfixes (NSS, relay, backport from 0.4.0.4-rc):
1049 - When running with NSS, disable TLS 1.2 ciphersuites that use
1050 SHA384 for their PRF. Due to an NSS bug, the TLS key exporters for
1051 these ciphersuites don't work -- which caused relays to fail to
1052 handshake with one another when these ciphersuites were enabled.
1053 Fixes bug 29241; bugfix on 0.3.5.1-alpha.
1055 o Major bugfixes (Onion service reachability, backport from 0.4.1.3-alpha):
1056 - Properly clean up the introduction point map when circuits change
1057 purpose from onion service circuits to pathbias, measurement, or
1058 other circuit types. This should fix some service-side instances
1059 of introduction point failure. Fixes bug 29034; bugfix
1062 o Major bugfixes (onion service v3, backport from 0.4.1.1-alpha):
1063 - Fix an unreachable bug in which an introduction point could try to
1064 send an INTRODUCE_ACK with a status code that Trunnel would refuse
1065 to encode, leading the relay to assert(). We've consolidated the
1066 ABI values into Trunnel now. Fixes bug 30454; bugfix
1068 - Clients can now handle unknown status codes from INTRODUCE_ACK
1069 cells. (The NACK behavior will stay the same.) This will allow us
1070 to extend status codes in the future without breaking the normal
1071 client behavior. Fixes another part of bug 30454; bugfix
1074 o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha):
1075 - Stop ignoring torrc options after an %include directive, when the
1076 included directory ends with a file that does not contain any
1077 config options (but does contain comments or whitespace). Fixes
1078 bug 31408; bugfix on 0.3.1.1-alpha.
1080 o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha):
1081 - Onion services now always use the exact number of intro points
1082 configured with the HiddenServiceNumIntroductionPoints option (or
1083 fewer if nodes are excluded). Before, a service could sometimes
1084 pick more intro points than configured. Fixes bug 31548; bugfix
1087 o Minor features (address selection, backport from 0.4.0.3-alpha):
1088 - Treat the subnet 100.64.0.0/10 as public for some purposes;
1089 private for others. This subnet is the RFC 6598 (Carrier Grade
1090 NAT) IP range, and is deployed by many ISPs as an alternative to
1091 RFC 1918 that does not break existing internal networks. Tor now
1092 blocks SOCKS and control ports on these addresses and warns users
1093 if client ports or ExtORPorts are listening on a RFC 6598 address.
1094 Closes ticket 28525. Patch by Neel Chauhan.
1096 o Minor features (bandwidth authority, backport from 0.4.0.4-rc):
1097 - Make bandwidth authorities ignore relays that are reported in the
1098 bandwidth file with the flag "vote=0". This change allows us to
1099 report unmeasured relays for diagnostic reasons without including
1100 their bandwidth in the bandwidth authorities' vote. Closes
1103 o Minor features (compile-time modules, backport from version 0.4.1.1-alpha):
1104 - Add a "--list-modules" command to print a list of which compile-
1105 time modules are enabled. Closes ticket 30452.
1107 o Minor features (continuous integration, backport from 0.4.0.4-rc):
1108 - On Travis Rust builds, cleanup Rust registry and refrain from
1109 caching the "target/" directory to speed up builds. Resolves
1112 o Minor features (continuous integration, backport from 0.4.0.5):
1113 - In Travis, tell timelimit to use stem's backtrace signals, and
1114 launch python directly from timelimit, so python receives the
1115 signals from timelimit, rather than make. Closes ticket 30117.
1117 o Minor features (continuous integration, backport from 0.4.1.1-alpha):
1118 - Remove sudo configuration lines from .travis.yml as they are no
1119 longer needed with current Travis build environment. Resolves
1122 o Minor features (continuous integration, backport from 0.4.1.4-rc):
1123 - Our Travis configuration now uses Chutney to run some network
1124 integration tests automatically. Closes ticket 29280.
1126 o Minor features (continuous integration, backport from 0.4.2.2-alpha):
1127 - When building on Appveyor and Travis, pass the "-k" flag to make,
1128 so that we are informed of all compilation failures, not just the
1129 first one or two. Closes ticket 31372.
1131 o Minor features (fallback directory list, backport from 0.4.1.4-rc):
1132 - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc
1133 in December 2018 (of which ~122 were still functional), with a
1134 list of 148 fallbacks (70 new, 78 existing, 79 removed) generated
1135 in June 2019. Closes ticket 28795.
1137 o Minor features (geoip, backport from 0.4.2.5):
1138 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
1139 Country database. Closes ticket 32685.
1141 o Minor features (NSS, diagnostic, backport from 0.4.0.4-rc):
1142 - Try to log an error from NSS (if there is any) and a more useful
1143 description of our situation if we are using NSS and a call to
1144 SSL_ExportKeyingMaterial() fails. Diagnostic for ticket 29241.
1146 o Minor features (stem tests, backport from 0.4.2.1-alpha):
1147 - Change "make test-stem" so it only runs the stem tests that use
1148 tor. This change makes test-stem faster and more reliable. Closes
1151 o Minor bugfixes (security, backport from 0.4.0.4-rc):
1152 - Verify in more places that we are not about to create a buffer
1153 with more than INT_MAX bytes, to avoid possible OOB access in the
1154 event of bugs. Fixes bug 30041; bugfix on 0.2.0.16. Found and
1155 fixed by Tobias Stoeckmann.
1156 - Fix a potential double free bug when reading huge bandwidth files.
1157 The issue is not exploitable in the current Tor network because
1158 the vulnerable code is only reached when directory authorities
1159 read bandwidth files, but bandwidth files come from a trusted
1160 source (usually the authorities themselves). Furthermore, the
1161 issue is only exploitable in rare (non-POSIX) 32-bit architectures,
1162 which are not used by any of the current authorities. Fixes bug
1163 30040; bugfix on 0.3.5.1-alpha. Bug found and fixed by
1166 o Minor bugfix (continuous integration, backport from 0.4.0.4-rc):
1167 - Reset coverage state on disk after Travis CI has finished. This
1168 should prevent future coverage merge errors from causing the test
1169 suite for the "process" subsystem to fail. The process subsystem
1170 was introduced in 0.4.0.1-alpha. Fixes bug 29036; bugfix
1172 - Terminate test-stem if it takes more than 9.5 minutes to run.
1173 (Travis terminates the job after 10 minutes of no output.)
1174 Diagnostic for 29437. Fixes bug 30011; bugfix on 0.3.5.4-alpha.
1176 o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha):
1177 - Avoid spurious errors when Appveyor CI fails before the install step.
1178 Fixes bug 31884; bugfix on 0.3.4.2-alpha.
1180 o Minor bugfixes (build system, backport form 0.4.2.1-alpha):
1181 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
1182 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
1184 o Minor bugfixes (C correctness, backport from 0.4.0.4-rc):
1185 - Fix an unlikely memory leak in consensus_diff_apply(). Fixes bug
1186 29824; bugfix on 0.3.1.1-alpha. This is Coverity warning
1189 o Minor bugfixes (circuit isolation, backport from 0.4.1.3-alpha):
1190 - Fix a logic error that prevented the SessionGroup sub-option from
1191 being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha.
1193 o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc):
1194 - Fix a BUG() assertion that occurs within a very small race window
1195 between when a client intro circuit opens and when its descriptor
1196 gets cleaned up from the cache. The circuit is now closed early,
1197 which will trigger a re-fetch of the descriptor and continue the
1198 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
1200 o Minor bugfixes (clock skew detection, backport from 0.4.1.5):
1201 - Don't believe clock skew results from NETINFO cells that appear to
1202 arrive before we sent the VERSIONS cells they are responding to.
1203 Previously, we would accept them up to 3 minutes "in the past".
1204 Fixes bug 31343; bugfix on 0.2.4.4-alpha.
1206 o Minor bugfixes (compilation warning, backport from 0.4.1.5):
1207 - Fix a compilation warning on Windows about casting a function
1208 pointer for GetTickCount64(). Fixes bug 31374; bugfix
1211 o Minor bugfixes (compilation, backport from 0.4.0.2-alpha):
1212 - Silence a compiler warning in test-memwipe.c on OpenBSD. Fixes bug
1213 29145; bugfix on 0.2.9.3-alpha. Patch from Kris Katterjohn.
1215 o Minor bugfixes (compilation, backport from 0.4.1.5):
1216 - Avoid using labs() on time_t, which can cause compilation warnings
1217 on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
1219 o Minor bugfixes (compilation, backport from 0.4.2.1-alpha):
1220 - Suppress spurious float-conversion warnings from GCC when calling
1221 floating-point classifier functions on FreeBSD. Fixes part of bug
1222 31687; bugfix on 0.3.1.5-alpha.
1224 o Minor bugfixes (compilation, unusual configurations, backport from 0.4.1.1-alpha):
1225 - Avoid failures when building with the ALL_BUGS_ARE_FATAL option
1226 due to missing declarations of abort(), and prevent other such
1227 failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.
1229 o Minor bugfixes (configuration, proxies, backport from 0.4.1.2-alpha):
1230 - Fix a bug that prevented us from supporting SOCKS5 proxies that
1231 want authentication along with configured (but unused!)
1232 ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.
1234 o Minor bugfixes (connections, backport from 0.4.2.3-rc):
1235 - Avoid trying to read data from closed connections, which can cause
1236 needless loops in Libevent and infinite loops in Shadow. Fixes bug
1237 30344; bugfix on 0.1.1.1-alpha.
1239 o Minor bugfixes (continuous integration, backport from 0.4.1.3-alpha):
1240 - Allow the test-stem job to fail in Travis, because it sometimes
1241 hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha.
1242 - Skip test_rebind on macOS in Travis, because it is unreliable on
1243 macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
1244 - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment
1245 variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
1247 o Minor bugfixes (crash on exit, backport from 0.4.1.4-rc):
1248 - Avoid a set of possible code paths that could try to use freed
1249 memory in routerlist_free() while Tor was exiting. Fixes bug
1250 31003; bugfix on 0.1.2.2-alpha.
1252 o Minor bugfixes (directory authorities, backport from 0.4.1.3-alpha):
1253 - Stop crashing after parsing an unknown descriptor purpose
1254 annotation. We think this bug can only be triggered by modifying a
1255 local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha.
1257 o Minor bugfixes (directory authority, backport from 0.4.1.2-alpha):
1258 - Move the "bandwidth-file-headers" line in directory authority
1259 votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix
1262 o Minor bugfixes (error handling, backport from 0.4.2.1-alpha):
1263 - On abort, try harder to flush the output buffers of log messages.
1264 On some platforms (macOS), log messages could be discarded when
1265 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
1266 - Report the tor version whenever an assertion fails. Previously, we
1267 only reported the Tor version on some crashes, and some non-fatal
1268 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
1270 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha):
1271 - When extracting an IPv6 address from a PF-based proxy, verify that
1272 we are actually configured to receive an IPv6 address, and log an
1273 internal error if not. Fixes part of bug 31687; bugfix
1276 o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
1277 - When tor is missing descriptors for some primary entry guards,
1278 make the log message less alarming. It's normal for descriptors to
1279 expire, as long as tor fetches new ones soon after. Fixes bug
1280 31657; bugfix on 0.3.3.1-alpha.
1282 o Minor bugfixes (logging, backport from 0.4.0.2-alpha):
1283 - Avoid logging that we are relaxing a circuit timeout when that
1284 timeout is fixed. Fixes bug 28698; bugfix on 0.2.4.7-alpha.
1286 o Minor bugfixes (logging, backport from 0.4.0.3-alpha):
1287 - Correct a misleading error message when IPv4Only or IPv6Only is
1288 used but the resolved address can not be interpreted as an address
1289 of the specified IP version. Fixes bug 13221; bugfix on
1290 0.2.3.9-alpha. Patch from Kris Katterjohn.
1291 - Log the correct port number for listening sockets when "auto" is
1292 used to let Tor pick the port number. Previously, port 0 was
1293 logged instead of the actual port number. Fixes bug 29144; bugfix
1294 on 0.3.5.1-alpha. Patch from Kris Katterjohn.
1295 - Stop logging a BUG() warning when Tor is waiting for exit
1296 descriptors. Fixes bug 28656; bugfix on 0.3.5.1-alpha.
1298 o Minor bugfixes (logging, backport from 0.4.1.1-alpha):
1299 - Do not log a warning when running with an OpenSSL version other
1300 than the one Tor was compiled with, if the two versions should be
1301 compatible. Previously, we would warn whenever the version was
1302 different. Fixes bug 30190; bugfix on 0.2.4.2-alpha.
1304 o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
1305 - Change log level of message "Hash of session info was not as
1306 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
1309 o Minor bugfixes (logging, backport from 0.4.2.2-alpha):
1310 - Rate-limit our the logging message about the obsolete .exit
1311 notation. Previously, there was no limit on this warning, which
1312 could potentially be triggered many times by a hostile website.
1313 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
1315 o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha):
1316 - Do not log a nonfatal assertion failure when receiving a VERSIONS
1317 cell on a connection using the obsolete v1 link protocol. Log a
1318 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
1320 o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha):
1321 - Reset the periodic events' "enabled" flag when Tor is shut down
1322 cleanly. Previously, this flag was left on, which caused periodic
1323 events not to be re-enabled when Tor was relaunched in-process
1324 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
1327 o Minor bugfixes (memory leak, backport from 0.4.1.1-alpha):
1328 - Avoid a minor memory leak that could occur on relays when failing
1329 to create a "keys" directory. Fixes bug 30148; bugfix
1332 o Minor bugfixes (memory leak, backport from 0.4.1.4-rc):
1333 - Fix a trivial memory leak when parsing an invalid value
1334 from a download schedule in the configuration. Fixes bug
1335 30894; bugfix on 0.3.4.1-alpha.
1337 o Minor bugfixes (memory management, backport from 0.4.0.3-alpha):
1338 - Refactor the shared random state's memory management so that it
1339 actually takes ownership of the shared random value pointers.
1340 Fixes bug 29706; bugfix on 0.2.9.1-alpha.
1342 o Minor bugfixes (memory management, testing, backport from 0.4.0.3-alpha):
1343 - Stop leaking parts of the shared random state in the shared-random
1344 unit tests. Fixes bug 29599; bugfix on 0.2.9.1-alpha.
1346 o Minor bugfixes (onion services, backport from 0.4.1.1-alpha):
1347 - Avoid a GCC 9.1.1 warning (and possible crash depending on libc
1348 implemenation) when failing to load an onion service client
1349 authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha.
1351 o Minor bugfixes (out-of-memory handler, backport from 0.4.1.2-alpha):
1352 - When purging the DNS cache because of an out-of-memory condition,
1353 try purging just the older entries at first. Previously, we would
1354 always purge the whole thing. Fixes bug 29617; bugfix
1357 o Minor bugfixes (portability, backport from 0.4.1.2-alpha):
1358 - Avoid crashing in our tor_vasprintf() implementation on systems
1359 that define neither vasprintf() nor _vscprintf(). (This bug has
1360 been here long enough that we question whether people are running
1361 Tor on such systems, but we're applying the fix out of caution.)
1362 Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by
1365 o Minor bugfixes (relay, backport from 0.4.2.2-alpha):
1366 - Avoid crashing when starting with a corrupt keys directory where
1367 the old ntor key and the new ntor key are identical. Fixes bug
1368 30916; bugfix on 0.2.4.8-alpha.
1370 o Minor bugfixes (rust, backport from 0.4.0.5):
1371 - Abort on panic in all build profiles, instead of potentially
1372 unwinding into C code. Fixes bug 27199; bugfix on 0.3.3.1-alpha.
1374 o Minor bugfixes (rust, backport from 0.4.2.1-alpha):
1375 - Correctly exclude a redundant rust build job in Travis. Fixes bug
1376 31463; bugfix on 0.3.5.4-alpha.
1378 o Minor bugfixes (single onion services, backport from 0.4.0.3-alpha):
1379 - Allow connections to single onion services to remain idle without
1380 being disconnected. Previously, relays acting as rendezvous points
1381 for single onion services were mistakenly closing idle rendezvous
1382 circuits after 60 seconds, thinking that they were unused
1383 directory-fetching circuits that had served their purpose. Fixes
1384 bug 29665; bugfix on 0.2.1.26.
1386 o Minor bugfixes (stats, backport from 0.4.0.3-alpha):
1387 - When ExtraInfoStatistics is 0, stop including PaddingStatistics in
1388 relay and bridge extra-info documents. Fixes bug 29017; bugfix
1391 o Minor bugfixes (testing, backport from 0.4.0.3-alpha):
1392 - Downgrade some LOG_ERR messages in the address/* tests to
1393 warnings. The LOG_ERR messages were occurring when we had no
1394 configured network. We were failing the unit tests, because we
1395 backported 28668 to 0.3.5.8, but did not backport 29530. Fixes bug
1396 29530; bugfix on 0.3.5.8.
1397 - Fix our gcov wrapper script to look for object files at the
1398 correct locations. Fixes bug 29435; bugfix on 0.3.5.1-alpha.
1400 o Minor bugfixes (testing, backport from 0.4.0.4-rc):
1401 - Backport the 0.3.4 src/test/test-network.sh to 0.2.9. We need a
1402 recent test-network.sh to use new chutney features in CI. Fixes
1403 bug 29703; bugfix on 0.2.9.1-alpha.
1404 - Fix a test failure on Windows caused by an unexpected "BUG"
1405 warning in our tests for tor_gmtime_r(-1). Fixes bug 29922; bugfix
1408 o Minor bugfixes (testing, backport from 0.4.2.3-alpha):
1409 - When testing port rebinding, don't busy-wait for tor to log.
1410 Instead, actually sleep for a short time before polling again.
1411 Also improve the formatting of control commands and log messages.
1412 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
1414 o Minor bugfixes (TLS protocol, backport form 0.4.0.4-rc):
1415 - When classifying a client's selection of TLS ciphers, if the
1416 client ciphers are not yet available, do not cache the result.
1417 Previously, we had cached the unavailability of the cipher list
1418 and never looked again, which in turn led us to assume that the
1419 client only supported the ancient V1 link protocol. This, in turn,
1420 was causing Stem integration tests to stall in some cases. Fixes
1421 bug 30021; bugfix on 0.2.4.8-alpha.
1423 o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha):
1424 - Log bugs about the TLS read buffer's length only once, rather than
1425 filling the logs with similar warnings. Fixes bug 31939; bugfix
1428 o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
1429 - Always retry v2 single onion service intro and rend circuits with
1430 a 3-hop path. Previously, v2 single onion services used a 3-hop
1431 path when rendezvous circuits were retried after a remote or
1432 delayed failure, but a 1-hop path for immediate retries. Fixes bug
1433 23818; bugfix on 0.2.9.3-alpha.
1434 - Make v3 single onion services fall back to a 3-hop intro, when all
1435 intro points are unreachable via a 1-hop path. Previously, v3
1436 single onion services failed when all intro nodes were unreachable
1437 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
1439 o Minor bugfixes (Windows, CI, backport from 0.4.0.3-alpha):
1440 - Skip the Appveyor 32-bit Windows Server 2016 job, and 64-bit
1441 Windows Server 2012 R2 job. The remaining 2 jobs still provide
1442 coverage of 64/32-bit, and Windows Server 2016/2012 R2. Also set
1443 fast_finish, so failed jobs terminate the build immediately. Fixes
1444 bug 29601; bugfix on 0.3.5.4-alpha.
1446 o Documentation (backport from 0.4.2.1-alpha):
1447 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
1448 notice.html so that operators no longer have to host it
1449 themselves. Closes ticket 31089.
1451 o Testing (backport from 0.4.1.2-alpha):
1452 - Specify torrc paths (with empty files) when launching tor in
1453 integration tests; refrain from reading user and system torrcs.
1454 Resolves issue 29702.
1456 o Testing (continuous integration, backport from 0.4.1.1-alpha):
1457 - In Travis, show stem's tor log after failure. Closes ticket 30234.
1459 o Testing (continuous integration, backport from 0.4.1.5):
1460 - In Travis, make stem log a controller trace to the console, and
1461 tail stem's tor log after failure. Closes ticket 30591.
1462 - In Travis, only run the stem tests that use a tor binary. Closes
1465 o Testing (continuous integration, backport from 0.4.2.3-alpha):
1466 - Disable all but one Travis CI macOS build, to mitigate slow
1467 scheduling of Travis macOS jobs. Closes ticket 32177.
1468 - Run the chutney IPv6 networks as part of Travis CI. Closes
1470 - Simplify the Travis CI build matrix, and optimise for build time.
1471 Closes ticket 31859.
1472 - Use Windows Server 2019 instead of Windows Server 2016 in our
1473 Appveyor builds. Closes ticket 32086.
1475 o Testing (continuous integration, backport from 0.4.2.4-rc):
1476 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
1477 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
1478 until we can fix some Bionic permissions issues (see ticket
1479 32240). Related to ticket 31919.
1480 - Install the mingw OpenSSL package in Appveyor. This makes sure
1481 that the OpenSSL headers and libraries match in Tor's Appveyor
1482 builds. (This bug was triggered by an Appveyor image update.)
1483 Fixes bug 32449; bugfix on 0.3.5.6-rc.
1484 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
1486 o Testing (continuous integration, backport from 0.4.2.5):
1487 - Require C99 standards-conforming code in Travis CI, but allow GNU gcc
1488 extensions. Also activates clang's -Wtypedef-redefinition warnings.
1489 Build some jobs with -std=gnu99, and some jobs without.
1490 Closes ticket 32500.
1492 Changes in version 0.4.2.4-rc - 2019-11-15
1493 Tor 0.4.2.4-rc is the first release candidate in its series. It fixes
1494 several bugs from earlier versions, including a few that would result in
1495 stack traces or incorrect behavior.
1497 o Minor features (build system):
1498 - Make pkg-config use --prefix when cross-compiling, if
1499 PKG_CONFIG_PATH is not set. Closes ticket 32191.
1501 o Minor features (geoip):
1502 - Update geoip and geoip6 to the November 6 2019 Maxmind GeoLite2
1503 Country database. Closes ticket 32440.
1505 o Minor bugfixes (client, onion service v3):
1506 - Fix a BUG() assertion that occurs within a very small race window
1507 between when a client intro circuit opens and when its descriptor
1508 gets cleaned up from the cache. The circuit is now closed early,
1509 which will trigger a re-fetch of the descriptor and continue the
1510 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
1512 o Minor bugfixes (code quality):
1513 - Fix "make check-includes" so it runs correctly on out-of-tree
1514 builds. Fixes bug 31335; bugfix on 0.3.5.1-alpha.
1516 o Minor bugfixes (configuration):
1517 - Log the option name when skipping an obsolete option. Fixes bug
1518 32295; bugfix on 0.4.2.1-alpha.
1520 o Minor bugfixes (crash):
1521 - When running Tor with an option like --verify-config or
1522 --dump-config that does not start the event loop, avoid crashing
1523 if we try to exit early because of an error. Fixes bug 32407;
1524 bugfix on 0.3.3.1-alpha.
1526 o Minor bugfixes (directory):
1527 - When checking if a directory connection is anonymous, test if the
1528 circuit was marked for close before looking at its channel. This
1529 avoids a BUG() stacktrace if the circuit was previously closed.
1530 Fixes bug 31958; bugfix on 0.4.2.1-alpha.
1532 o Minor bugfixes (shellcheck):
1533 - Fix minor shellcheck errors in the git-*.sh scripts. Fixes bug
1534 32402; bugfix on 0.4.2.1-alpha.
1535 - Start checking most scripts for shellcheck errors again. Fixes bug
1536 32402; bugfix on 0.4.2.1-alpha.
1538 o Testing (continuous integration):
1539 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
1540 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
1541 until we can fix some Bionic permissions issues (see ticket
1542 32240). Related to ticket 31919.
1543 - Install the mingw OpenSSL package in Appveyor. This makes sure
1544 that the OpenSSL headers and libraries match in Tor's Appveyor
1545 builds. (This bug was triggered by an Appveyor image update.)
1546 Fixes bug 32449; bugfix on 0.3.5.6-rc.
1547 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
1550 Changes in version 0.4.2.3-alpha - 2019-10-24
1551 This release fixes several bugs from the previous alpha release, and
1552 from earlier versions of Tor.
1554 o Major bugfixes (relay):
1555 - Relays now respect their AccountingMax bandwidth again. When
1556 relays entered "soft" hibernation (which typically starts when
1557 we've hit 90% of our AccountingMax), we had stopped checking
1558 whether we should enter hard hibernation. Soft hibernation refuses
1559 new connections and new circuits, but the existing circuits can
1560 continue, meaning that relays could have exceeded their configured
1561 AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.
1563 o Major bugfixes (v3 onion services):
1564 - Onion services now always use the exact number of intro points
1565 configured with the HiddenServiceNumIntroductionPoints option (or
1566 fewer if nodes are excluded). Before, a service could sometimes
1567 pick more intro points than configured. Fixes bug 31548; bugfix
1570 o Minor feature (onion services, control port):
1571 - The ADD_ONION command's keyword "BEST" now defaults to ED25519-V3
1572 (v3) onion services. Previously it defaulted to RSA1024 (v2).
1573 Closes ticket 29669.
1575 o Minor features (testing):
1576 - When running tests that attempt to look up hostnames, replace the
1577 libc name lookup functions with ones that do not actually touch
1578 the network. This way, the tests complete more quickly in the
1579 presence of a slow or missing DNS resolver. Closes ticket 31841.
1581 o Minor features (testing, continuous integration):
1582 - Disable all but one Travis CI macOS build, to mitigate slow
1583 scheduling of Travis macOS jobs. Closes ticket 32177.
1584 - Run the chutney IPv6 networks as part of Travis CI. Closes
1586 - Simplify the Travis CI build matrix, and optimise for build time.
1587 Closes ticket 31859.
1588 - Use Windows Server 2019 instead of Windows Server 2016 in our
1589 Appveyor builds. Closes ticket 32086.
1591 o Minor bugfixes (build system):
1592 - Interpret "--disable-module-dirauth=no" correctly. Fixes bug
1593 32124; bugfix on 0.3.4.1-alpha.
1594 - Interpret "--with-tcmalloc=no" correctly. Fixes bug 32124; bugfix
1596 - Stop failing when jemalloc is requested, but tcmalloc is not
1597 found. Fixes bug 32124; bugfix on 0.3.5.1-alpha.
1598 - When pkg-config is not installed, or a library that depends on
1599 pkg-config is not found, tell the user what to do to fix the
1600 problem. Fixes bug 31922; bugfix on 0.3.1.1-alpha.
1602 o Minor bugfixes (connections):
1603 - Avoid trying to read data from closed connections, which can cause
1604 needless loops in Libevent and infinite loops in Shadow. Fixes bug
1605 30344; bugfix on 0.1.1.1-alpha.
1607 o Minor bugfixes (error handling):
1608 - Always lock the backtrace buffer before it is used. Fixes bug
1609 31734; bugfix on 0.2.5.3-alpha.
1611 o Minor bugfixes (mainloop, periodic events, in-process API):
1612 - Reset the periodic events' "enabled" flag when Tor is shut down
1613 cleanly. Previously, this flag was left on, which caused periodic
1614 events not to be re-enabled when Tor was relaunched in-process
1615 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
1618 o Minor bugfixes (process management):
1619 - Remove overly strict assertions that triggered when a pluggable
1620 transport failed to launch. Fixes bug 31091; bugfix
1622 - Remove an assertion in the Unix process backend. This assertion
1623 would trigger when we failed to find the executable for a child
1624 process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.
1626 o Minor bugfixes (testing):
1627 - Avoid intermittent test failures due to a test that had relied on
1628 inconsistent timing sources. Fixes bug 31995; bugfix
1630 - When testing port rebinding, don't busy-wait for tor to log.
1631 Instead, actually sleep for a short time before polling again.
1632 Also improve the formatting of control commands and log messages.
1633 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
1635 o Minor bugfixes (tls, logging):
1636 - Log bugs about the TLS read buffer's length only once, rather than
1637 filling the logs with similar warnings. Fixes bug 31939; bugfix
1640 o Minor bugfixes (v3 onion services):
1641 - Fix an implicit conversion from ssize_t to size_t discovered by
1642 Coverity. Fixes bug 31682; bugfix on 0.4.2.1-alpha.
1643 - Fix a memory leak in an unlikely error code path when encoding HS
1644 DoS establish intro extension cell. Fixes bug 32063; bugfix
1646 - When cleaning up intro circuits for a v3 onion service, don't
1647 remove circuits that have an established or pending circuit, even
1648 if they ran out of retries. This way, we don't remove a circuit on
1649 its last retry. Fixes bug 31652; bugfix on 0.3.2.1-alpha.
1652 - Correct the description of "GuardLifetime". Fixes bug 31189;
1653 bugfix on 0.3.0.1-alpha.
1654 - Make clear in the man page, in both the bandwidth section and the
1655 AccountingMax section, that Tor counts in powers of two, not
1656 powers of ten: 1 GByte is 1024*1024*1024 bytes, not one billion
1657 bytes. Resolves ticket 32106.
1660 Changes in version 0.4.2.2-alpha - 2019-10-07
1661 This release fixes several bugs from the previous alpha release, and
1662 from earlier versions. It also includes a change in authorities, so
1663 that they begin to reject the currently unsupported release series.
1665 o Major features (directory authorities):
1666 - Directory authorities now reject relays running all currently
1667 deprecated release series. The currently supported release series
1668 are: 0.2.9, 0.3.5, 0.4.0, 0.4.1, and 0.4.2. Closes ticket 31549.
1670 o Major bugfixes (embedded Tor):
1671 - Avoid a possible crash when restarting Tor in embedded mode and
1672 enabling a different set of publish/subscribe messages. Fixes bug
1673 31898; bugfix on 0.4.1.1-alpha.
1675 o Major bugfixes (torrc parsing):
1676 - Stop ignoring torrc options after an %include directive, when the
1677 included directory ends with a file that does not contain any
1678 config options (but does contain comments or whitespace). Fixes
1679 bug 31408; bugfix on 0.3.1.1-alpha.
1681 o Minor features (auto-formatting scripts):
1682 - When annotating C macros, never generate a line that our check-
1683 spaces script would reject. Closes ticket 31759.
1684 - When annotating C macros, try to remove cases of double-negation.
1685 Closes ticket 31779.
1687 o Minor features (continuous integration):
1688 - When building on Appveyor and Travis, pass the "-k" flag to make,
1689 so that we are informed of all compilation failures, not just the
1690 first one or two. Closes ticket 31372.
1692 o Minor features (geoip):
1693 - Update geoip and geoip6 to the October 1 2019 Maxmind GeoLite2
1694 Country database. Closes ticket 31931.
1696 o Minor features (maintenance scripts):
1697 - Add a Coccinelle script to detect bugs caused by incrementing or
1698 decrementing a variable inside a call to log_debug(). Since
1699 log_debug() is a macro whose arguments are conditionally
1700 evaluated, it is usually an error to do this. One such bug was
1701 30628, in which SENDME cells were miscounted by a decrement
1702 operator inside a log_debug() call. Closes ticket 30743.
1704 o Minor features (onion services v3):
1705 - Assist users who try to setup v2 client authorization in v3 onion
1706 services by pointing them to the right documentation. Closes
1709 o Minor bugfixes (Appveyor continuous integration):
1710 - Avoid spurious errors when Appveyor CI fails before the install
1711 step. Fixes bug 31884; bugfix on 0.3.4.2-alpha.
1713 o Minor bugfixes (best practices tracker):
1714 - When listing overbroad exceptions, do not also list problems, and
1715 do not list insufficiently broad exceptions. Fixes bug 31338;
1716 bugfix on 0.4.2.1-alpha.
1718 o Minor bugfixes (controller protocol):
1719 - Fix the MAPADDRESS controller command to accept one or more
1720 arguments. Previously, it required two or more arguments, and
1721 ignored the first. Fixes bug 31772; bugfix on 0.4.1.1-alpha.
1723 o Minor bugfixes (logging):
1724 - Add a missing check for HAVE_PTHREAD_H, because the backtrace code
1725 uses mutexes. Fixes bug 31614; bugfix on 0.2.5.2-alpha.
1726 - Disable backtrace signal handlers when shutting down tor. Fixes
1727 bug 31614; bugfix on 0.2.5.2-alpha.
1728 - Rate-limit our the logging message about the obsolete .exit
1729 notation. Previously, there was no limit on this warning, which
1730 could potentially be triggered many times by a hostile website.
1731 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
1732 - When initialising log domain masks, only set known log domains.
1733 Fixes bug 31854; bugfix on 0.2.1.1-alpha.
1735 o Minor bugfixes (logging, protocol violations):
1736 - Do not log a nonfatal assertion failure when receiving a VERSIONS
1737 cell on a connection using the obsolete v1 link protocol. Log a
1738 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
1740 o Minor bugfixes (modules):
1741 - Explain what the optional Directory Authority module is, and what
1742 happens when it is disabled. Fixes bug 31825; bugfix
1745 o Minor bugfixes (multithreading):
1746 - Avoid some undefined behaviour when freeing mutexes. Fixes bug
1747 31736; bugfix on 0.0.7.
1749 o Minor bugfixes (relay):
1750 - Avoid crashing when starting with a corrupt keys directory where
1751 the old ntor key and the new ntor key are identical. Fixes bug
1752 30916; bugfix on 0.2.4.8-alpha.
1754 o Minor bugfixes (tests, SunOS):
1755 - Avoid a map_anon_nofork test failure due to a signed/unsigned
1756 integer comparison. Fixes bug 31897; bugfix on 0.4.1.1-alpha.
1758 o Code simplification and refactoring:
1759 - Refactor connection_control_process_inbuf() to reduce the size of
1760 a practracker exception. Closes ticket 31840.
1761 - Refactor the microdescs_parse_from_string() function into smaller
1762 pieces, for better comprehensibility. Closes ticket 31675.
1763 - Use SEVERITY_MASK_IDX() to find the LOG_* mask indexes in the unit
1764 tests and fuzzers, rather than using hard-coded values. Closes
1766 - Interface for function `decrypt_desc_layer` cleaned up. Closes
1770 - Document the signal-safe logging behaviour in the tor man page.
1771 Also add some comments to the relevant functions. Closes
1773 - Explain why we can't destroy the backtrace buffer mutex. Explain
1774 why we don't need to destroy the log mutex. Closes ticket 31736.
1775 - The Tor source code repository now includes a (somewhat dated)
1776 description of Tor's modular architecture, in doc/HACKING/design.
1777 This is based on the old "tor-guts.git" repository, which we are
1778 adopting and superseding. Closes ticket 31849.
1781 Changes in version 0.4.1.6 - 2019-09-19
1782 This release backports several bugfixes to improve stability and
1783 correctness. Anyone experiencing build problems or crashes with 0.4.1.5,
1784 or experiencing reliability issues with single onion services, should
1787 o Major bugfixes (crash, Linux, Android, backport from 0.4.2.1-alpha):
1788 - Tolerate systems (including some Android installations) where
1789 madvise and MADV_DONTDUMP are available at build-time, but not at
1790 run time. Previously, these systems would notice a failed syscall
1791 and abort. Fixes bug 31570; bugfix on 0.4.1.1-alpha.
1792 - Tolerate systems (including some Linux installations) where
1793 madvise and/or MADV_DONTFORK are available at build-time, but not
1794 at run time. Previously, these systems would notice a failed
1795 syscall and abort. Fixes bug 31696; bugfix on 0.4.1.1-alpha.
1797 o Minor features (stem tests, backport from 0.4.2.1-alpha):
1798 - Change "make test-stem" so it only runs the stem tests that use
1799 tor. This change makes test-stem faster and more reliable. Closes
1802 o Minor bugfixes (build system, backport form 0.4.2.1-alpha):
1803 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
1804 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
1806 o Minor bugfixes (compilation, backport from 0.4.2.1-alpha):
1807 - Add more stub functions to fix compilation on Android with link-
1808 time optimization when --disable-module-dirauth is used.
1809 Previously, these compilation settings would make the compiler
1810 look for functions that didn't exist. Fixes bug 31552; bugfix
1812 - Suppress spurious float-conversion warnings from GCC when calling
1813 floating-point classifier functions on FreeBSD. Fixes part of bug
1814 31687; bugfix on 0.3.1.5-alpha.
1816 o Minor bugfixes (controller protocol):
1817 - Fix the MAPADDRESS controller command to accept one or more
1818 arguments. Previously, it required two or more arguments, and ignored
1819 the first. Fixes bug 31772; bugfix on 0.4.1.1-alpha.
1821 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha):
1822 - When extracting an IPv6 address from a PF-based proxy, verify that
1823 we are actually configured to receive an IPv6 address, and log an
1824 internal error if not. Fixes part of bug 31687; bugfix
1827 o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
1828 - When tor is missing descriptors for some primary entry guards,
1829 make the log message less alarming. It's normal for descriptors to
1830 expire, as long as tor fetches new ones soon after. Fixes bug
1831 31657; bugfix on 0.3.3.1-alpha.
1833 o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
1834 - Change log level of message "Hash of session info was not as
1835 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
1838 o Minor bugfixes (rust, backport from 0.4.2.1-alpha):
1839 - Correctly exclude a redundant rust build job in Travis. Fixes bug
1840 31463; bugfix on 0.3.5.4-alpha.
1842 o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
1843 - Always retry v2 single onion service intro and rend circuits with
1844 a 3-hop path. Previously, v2 single onion services used a 3-hop
1845 path when rendezvous circuits were retried after a remote or
1846 delayed failure, but a 1-hop path for immediate retries. Fixes bug
1847 23818; bugfix on 0.2.9.3-alpha.
1849 o Minor bugfixes (v3 single onion services, backport from 0.4.2.1-alpha):
1850 - Always retry v3 single onion service intro and rend circuits with
1851 a 3-hop path. Previously, v3 single onion services used a 3-hop
1852 path when rend circuits were retried after a remote or delayed
1853 failure, but a 1-hop path for immediate retries. Fixes bug 23818;
1854 bugfix on 0.3.2.1-alpha.
1855 - Make v3 single onion services fall back to a 3-hop intro, when all
1856 intro points are unreachable via a 1-hop path. Previously, v3
1857 single onion services failed when all intro nodes were unreachable
1858 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
1860 o Documentation (backport from 0.4.2.1-alpha):
1861 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
1862 notice.html so that operators no longer have to host it
1863 themselves. Closes ticket 31089.
1866 Changes in version 0.4.2.1-alpha - 2019-09-17
1867 This is the first alpha release in the 0.4.2.x series. It adds new
1868 defenses for denial-of-service attacks against onion services. It also
1869 includes numerous kinds of bugfixes and refactoring to help improve
1870 Tor's stability and ease of development.
1872 o Major features (onion service v3, denial of service):
1873 - Add onion service introduction denial of service defenses. Intro
1874 points can now rate-limit client introduction requests, using
1875 parameters that can be sent by the service within the
1876 ESTABLISH_INTRO cell. If the cell extension for this is not used,
1877 the intro point will honor the consensus parameters. Closes
1880 o Major bugfixes (circuit build, guard):
1881 - When considering upgrading circuits from "waiting for guard" to
1882 "open", always ignore circuits that are marked for close.
1883 Previously we could end up in the situation where a subsystem is
1884 notified of a circuit opening, but the circuit is still marked for
1885 close, leading to undesirable behavior. Fixes bug 30871; bugfix
1888 o Major bugfixes (crash, Linux, Android):
1889 - Tolerate systems (including some Android installations) where
1890 madvise and MADV_DONTDUMP are available at build-time, but not at
1891 run time. Previously, these systems would notice a failed syscall
1892 and abort. Fixes bug 31570; bugfix on 0.4.1.1-alpha.
1893 - Tolerate systems (including some Linux installations) where
1894 madvise and/or MADV_DONTFORK are available at build-time, but not
1895 at run time. Previously, these systems would notice a failed
1896 syscall and abort. Fixes bug 31696; bugfix on 0.4.1.1-alpha.
1898 o Minor features (best practices tracker):
1899 - Our best-practices tracker now integrates with our include-checker
1900 tool to keep track of how many layering violations we have not yet
1901 fixed. We hope to reduce this number over time to improve Tor's
1902 modularity. Closes ticket 31176.
1903 - Add a TOR_PRACTRACKER_OPTIONS variable for passing arguments to
1904 practracker from the environment. We may want this for continuous
1905 integration. Closes ticket 31309.
1906 - Give a warning rather than an error when a practracker exception
1907 is violated by a small amount, add a --list-overbroad option to
1908 practracker that lists exceptions that are stricter than they need
1909 to be, and provide an environment variable for disabling
1910 practracker. Closes ticket 30752.
1911 - Our best-practices tracker now looks at headers as well as C
1912 files. Closes ticket 31175.
1914 o Minor features (build system):
1915 - Add --disable-manpage and --disable-html-manual options to
1916 configure script. This will enable shortening build times by not
1917 building documentation. Resolves issue 19381.
1919 o Minor features (compilation):
1920 - Log a more useful error message when we are compiling and one of
1921 the compile-time hardening options we have selected can be linked
1922 but not executed. Closes ticket 27530.
1924 o Minor features (configuration):
1925 - The configuration code has been extended to allow splitting
1926 configuration data across multiple objects. Previously, all
1927 configuration data needed to be kept in a single object, which
1928 tended to become bloated. Closes ticket 31240.
1930 o Minor features (continuous integration):
1931 - When running CI builds on Travis, put some random data in
1932 ~/.torrc, to make sure no tests are reading the Tor configuration
1933 file from its default location. Resolves issue 30102.
1935 o Minor features (debugging):
1936 - Log a nonfatal assertion failure if we encounter a configuration
1937 line whose command is "CLEAR" but which has a nonempty value. This
1938 should be impossible, according to the rules of our configuration
1939 line parsing. Closes ticket 31529.
1941 o Minor features (git hooks):
1942 - Our pre-commit git hook now checks for a special file before
1943 running practracker, so that practracker only runs on branches
1944 that are based on master. Since the pre-push hook calls the pre-
1945 commit hook, practracker will also only run before pushes of
1946 branches based on master. Closes ticket 30979.
1948 o Minor features (git scripts):
1949 - Add a "--" command-line argument, to separate git-push-all.sh
1950 script arguments from arguments that are passed through to git
1951 push. Closes ticket 31314.
1952 - Add a -r <remote-name> argument to git-push-all.sh, so the script
1953 can push test branches to a personal remote. Closes ticket 31314.
1954 - Add a -t <test-branch-prefix> argument to git-merge-forward.sh and
1955 git-push-all.sh, which makes these scripts create, merge forward,
1956 and push test branches. Closes ticket 31314.
1957 - Add a -u argument to git-merge-forward.sh, so that the script can
1958 re-use existing test branches after a merge failure and fix.
1959 Closes ticket 31314.
1960 - Add a TOR_GIT_PUSH env var, which sets the default git push
1961 command and arguments for git-push-all.sh. Closes ticket 31314.
1962 - Add a TOR_PUSH_DELAY variable to git-push-all.sh, which makes the
1963 script push master and maint branches with a delay between each
1964 branch. These delays trigger the CI jobs in a set order, which
1965 should show the most likely failures first. Also make pushes
1966 atomic by default, and make the script pass any command-line
1967 arguments to git push. Closes ticket 29879.
1968 - Call the shellcheck script from the pre-commit hook. Closes
1970 - Skip pushing test branches that are the same as a remote
1971 maint/release/master branch in git-push-all.sh by default. Add a
1972 -s argument, so git-push-all.sh can push all test branches. Closes
1975 o Minor features (IPv6, logging):
1976 - Log IPv6 addresses as well as IPv4 addresses when describing
1977 routerinfos, routerstatuses, and nodes. Closes ticket 21003.
1979 o Minor features (onion service v3):
1980 - Do not allow single hop clients to fetch or post an HS descriptor
1981 from an HSDir. Closes ticket 24964.
1983 o Minor features (onion service):
1984 - Disallow single-hop clients at the introduction point. We've
1985 removed Tor2web support a while back and single-hop rendezvous
1986 attempts are blocked at the relays. This change should remove load
1987 off the network from spammy clients. Close ticket 24963.
1989 o Minor features (stem tests):
1990 - Change "make test-stem" so it only runs the stem tests that use
1991 tor. This change makes test-stem faster and more reliable. Closes
1994 o Minor features (testing):
1995 - Add a script to invoke "tor --dump-config" and "tor
1996 --verify-config" with various configuration options, and see
1997 whether tor's resulting configuration or error messages are what
1998 we expect. Use it for integration testing of our +Option and
1999 /Option flags. Closes ticket 31637.
2000 - Improve test coverage for our existing configuration parsing and
2001 management API. Closes ticket 30893.
2002 - Add integration tests to make sure that practracker gives the
2003 outputs we expect. Closes ticket 31477.
2004 - The practracker self-tests are now run as part of the Tor test
2005 suite. Closes ticket 31304.
2007 o Minor features (token bucket):
2008 - Implement a generic token bucket that uses a single counter, for
2009 use in anti-DoS onion service work. Closes ticket 30687.
2011 o Minor bugfixes (best practices tracker):
2012 - Fix a few issues in the best-practices script, including tests,
2013 tab tolerance, error reporting, and directory-exclusion logic.
2014 Fixes bug 29746; bugfix on 0.4.1.1-alpha.
2015 - When running check-best-practices, only consider files in the src
2016 subdirectory. Previously we had recursively considered all
2017 subdirectories, which made us get confused by the temporary
2018 directories made by "make distcheck". Fixes bug 31578; bugfix
2021 o Minor bugfixes (build system):
2022 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
2023 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
2025 o Minor bugfixes (chutney, makefiles, documentation):
2026 - "make test-network-all" now shows the warnings from each test-
2027 network.sh run on the console, so developers see new warnings
2028 early. We've also improved the documentation for this feature, and
2029 renamed a Makefile variable so the code is self-documenting. Fixes
2030 bug 30455; bugfix on 0.3.0.4-rc.
2032 o Minor bugfixes (compilation):
2033 - Add more stub functions to fix compilation on Android with link-
2034 time optimization when --disable-module-dirauth is used.
2035 Previously, these compilation settings would make the compiler
2036 look for functions that didn't exist. Fixes bug 31552; bugfix
2038 - Suppress spurious float-conversion warnings from GCC when calling
2039 floating-point classifier functions on FreeBSD. Fixes part of bug
2040 31687; bugfix on 0.3.1.5-alpha.
2042 o Minor bugfixes (configuration):
2043 - Invalid floating-point values in the configuration file are now
2044 treated as errors in the configuration. Previously, they were
2045 ignored and treated as zero. Fixes bug 31475; bugfix on 0.0.1.
2047 o Minor bugfixes (coverity):
2048 - Add an assertion when parsing a BEGIN cell so that coverity can be
2049 sure that we are not about to dereference a NULL address. Fixes
2050 bug 31026; bugfix on 0.2.4.7-alpha. This is CID 1447296.
2051 - In our siphash implementation, when building for coverity, use
2052 memcpy in place of a switch statement, so that coverity can tell
2053 we are not accessing out-of-bounds memory. Fixes bug 31025; bugfix
2054 on 0.2.8.1-alpha. This is tracked as CID 1447293 and 1447295.
2055 - Fix several coverity warnings from our unit tests. Fixes bug
2056 31030; bugfix on 0.2.4.1-alpha, 0.3.2.1-alpha, and 0.4.0.1-alpha.
2058 o Minor bugfixes (developer tooling):
2059 - Only log git script changes in the post-merge script when the
2060 merge was to the master branch. Fixes bug 31040; bugfix
2063 o Minor bugfixes (directory authorities):
2064 - Return a distinct status when formatting annotations fails. Fixes
2065 bug 30780; bugfix on 0.2.0.8-alpha.
2067 o Minor bugfixes (error handling):
2068 - On abort, try harder to flush the output buffers of log messages.
2069 On some platforms (macOS), log messages could be discarded when
2070 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
2071 - Report the tor version whenever an assertion fails. Previously, we
2072 only reported the Tor version on some crashes, and some non-fatal
2073 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
2074 - When tor aborts due to an error, close log file descriptors before
2075 aborting. Closing the logs makes some OSes flush log file buffers,
2076 rather than deleting buffered log lines. Fixes bug 31594; bugfix
2079 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6):
2080 - When extracting an IPv6 address from a PF-based proxy, verify that
2081 we are actually configured to receive an IPv6 address, and log an
2082 internal error if not. Fixes part of bug 31687; bugfix
2085 o Minor bugfixes (git hooks):
2086 - Remove a duplicate call to practracker from the pre-push hook. The
2087 pre-push hook already calls the pre-commit hook, which calls
2088 practracker. Fixes bug 31462; bugfix on 0.4.1.1-alpha.
2090 o Minor bugfixes (git scripts):
2091 - Stop hard-coding the bash path in the git scripts. Some OSes don't
2092 have bash in /usr/bin, others have an ancient bash at this path.
2093 Fixes bug 30840; bugfix on 0.4.0.1-alpha.
2094 - Stop hard-coding the tor master branch name and worktree path in
2095 the git scripts. Fixes bug 30841; bugfix on 0.4.0.1-alpha.
2096 - Allow git-push-all.sh to be run from any directory. Previously,
2097 the script only worked if run from an upstream worktree directory.
2098 Closes ticket 31678.
2100 o Minor bugfixes (guards):
2101 - When tor is missing descriptors for some primary entry guards,
2102 make the log message less alarming. It's normal for descriptors to
2103 expire, as long as tor fetches new ones soon after. Fixes bug
2104 31657; bugfix on 0.3.3.1-alpha.
2106 o Minor bugfixes (ipv6):
2107 - Check for private IPv6 addresses alongside their IPv4 equivalents
2108 when authorities check descriptors. Previously, we only checked
2109 for private IPv4 addresses. Fixes bug 31088; bugfix on
2110 0.2.3.21-rc. Patch by Neel Chauhan.
2111 - When parsing microdescriptors, we should check the IPv6 exit
2112 policy alongside IPv4. Previously, we checked both exit policies
2113 for only router info structures, while microdescriptors were
2114 IPv4-only. Fixes bug 27284; bugfix on 0.2.3.1-alpha. Patch by
2117 o Minor bugfixes (logging):
2118 - Change log level of message "Hash of session info was not as
2119 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
2121 - Fix a code issue that would have broken our parsing of log domains
2122 as soon as we had 33 of them. Fortunately, we still only have 29.
2123 Fixes bug 31451; bugfix on 0.4.1.4-rc.
2125 o Minor bugfixes (memory management):
2126 - Stop leaking a small amount of memory in nt_service_install(), in
2127 unreachable code. Fixes bug 30799; bugfix on 0.2.0.7-alpha. Patch
2130 o Minor bugfixes (networking, IP addresses):
2131 - When parsing addresses via Tor's internal DNS lookup API, reject
2132 IPv4 addresses in square brackets, and accept IPv6 addresses in
2133 square brackets. This change completes the work started in 23082,
2134 making address parsing consistent between tor's internal DNS
2135 lookup and address parsing APIs. Fixes bug 30721; bugfix
2137 - When parsing addresses via Tor's internal address:port parsing and
2138 DNS lookup APIs, require IPv6 addresses with ports to have square
2139 brackets. But allow IPv6 addresses without ports, whether or not
2140 they have square brackets. Fixes bug 30721; bugfix
2143 o Minor bugfixes (onion service v3):
2144 - When purging the client descriptor cache, close any introduction
2145 point circuits associated with purged cache entries. This avoids
2146 picking those circuits later when connecting to the same
2147 introduction points. Fixes bug 30921; bugfix on 0.3.2.1-alpha.
2149 o Minor bugfixes (onion services):
2150 - In the hs_ident_circuit_t data structure, remove the unused field
2151 circuit_type and the respective argument in hs_ident_circuit_new().
2152 This field was set by clients (for introduction) and services (for
2153 introduction and rendezvous) but was never used afterwards. Fixes
2154 bug 31490; bugfix on 0.3.2.1-alpha. Patch by Neel Chauhan.
2156 o Minor bugfixes (operator tools):
2157 - Make tor-print-ed-signing-cert(1) print certificate expiration
2158 date in RFC 1123 and UNIX timestamp formats, to make output
2159 machine readable. Fixes bug 31012; bugfix on 0.3.5.1-alpha.
2161 o Minor bugfixes (rust):
2162 - Correctly exclude a redundant rust build job in Travis. Fixes bug
2163 31463; bugfix on 0.3.5.4-alpha.
2164 - Raise the minimum rustc version to 1.31.0, as checked by configure
2165 and CI. Fixes bug 31442; bugfix on 0.3.5.4-alpha.
2167 o Minor bugfixes (sendme, code structure):
2168 - Rename the trunnel SENDME file definition from sendme.trunnel to
2169 sendme_cell.trunnel to avoid having twice sendme.{c|h} in the
2170 repository. Fixes bug 30769; bugfix on 0.4.1.1-alpha.
2172 o Minor bugfixes (statistics):
2173 - Stop removing the ed25519 signature if the extra info file is too
2174 big. If the signature data was removed, but the keyword was kept,
2175 this could result in an unparseable extra info file. Fixes bug
2176 30958; bugfix on 0.2.7.2-alpha.
2178 o Minor bugfixes (subsystems):
2179 - Make the subsystem init order match the subsystem module
2180 dependencies. Call windows process security APIs as early as
2181 possible. Initialize logging before network and time, so that
2182 network and time can use logging. Fixes bug 31615; bugfix
2185 o Minor bugfixes (testing):
2186 - Teach the util/socketpair_ersatz test to work correctly when we
2187 have no network stack configured. Fixes bug 30804; bugfix
2190 o Minor bugfixes (v2 single onion services):
2191 - Always retry v2 single onion service intro and rend circuits with
2192 a 3-hop path. Previously, v2 single onion services used a 3-hop
2193 path when rendezvous circuits were retried after a remote or
2194 delayed failure, but a 1-hop path for immediate retries. Fixes bug
2195 23818; bugfix on 0.2.9.3-alpha.
2197 o Minor bugfixes (v3 single onion services):
2198 - Always retry v3 single onion service intro and rend circuits with
2199 a 3-hop path. Previously, v3 single onion services used a 3-hop
2200 path when rend circuits were retried after a remote or delayed
2201 failure, but a 1-hop path for immediate retries. Fixes bug 23818;
2202 bugfix on 0.3.2.1-alpha.
2203 - Make v3 single onion services fall back to a 3-hop intro, when all
2204 intro points are unreachable via a 1-hop path. Previously, v3
2205 single onion services failed when all intro nodes were unreachable
2206 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
2209 - Improve documentation in circuit padding subsystem. Patch by
2210 Tobias Pulls. Closes ticket 31113.
2211 - Include an example usage for IPv6 ORPort in our sample torrc.
2212 Closes ticket 31320; patch from Ali Raheem.
2213 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
2214 notice.html so that operators no longer have to host it
2215 themselves. Closes ticket 31089.
2218 - No longer include recommended package digests in votes as detailed
2219 in proposal 301. The RecommendedPackages torrc option is
2220 deprecated and will no longer have any effect. "package" lines
2221 will still be considered when computing consensuses for consensus
2222 methods that include them. (This change has no effect on the list
2223 of recommended Tor versions, which is still in use.) Closes
2225 - Remove torctl.in from contrib/dist directory. Resolves
2229 - Run shellcheck for all non-third-party shell scripts that are
2230 shipped with Tor. Closes ticket 29533.
2231 - When checking shell scripts, ignore any user-created directories.
2232 Closes ticket 30967.
2234 o Code simplification and refactoring (config handling):
2235 - Extract our variable manipulation code from confparse.c to a new
2236 lower-level typedvar.h module. Closes ticket 30864.
2237 - Lower another layer of object management from confparse.c to a
2238 more general tool. Now typed structure members are accessible via
2239 an abstract type. Implements ticket 30914.
2240 - Move our backend logic for working with configuration and state
2241 files into a lower-level library, since it no longer depends on
2242 any tor-specific functionality. Closes ticket 31626.
2243 - Numerous simplifications in configuration-handling logic: remove
2244 duplicated macro definitions, replace magical names with flags,
2245 and refactor "TestingTorNetwork" to use the same default-option
2246 logic as the rest of Tor. Closes ticket 30935.
2247 - Replace our ad-hoc set of flags for configuration variables and
2248 configuration variable types with fine-grained orthogonal flags
2249 corresponding to the actual behavior we want. Closes ticket 31625.
2251 o Code simplification and refactoring (misc):
2252 - Eliminate some uses of lower-level control reply abstractions,
2253 primarily in the onion_helper functions. Closes ticket 30889.
2254 - Rework bootstrap tracking to use the new publish-subscribe
2255 subsystem. Closes ticket 29976.
2256 - Rewrite format_node_description() and router_get_verbose_nickname()
2257 to use strlcpy() and strlcat(). The previous implementation used
2258 memcpy() and pointer arithmetic, which was error-prone. Closes
2259 ticket 31545. This is CID 1452819.
2260 - Split extrainfo_dump_to_string() into smaller functions. Closes
2262 - Use the ptrdiff_t type consistently for expressing variable
2263 offsets and pointer differences. Previously we incorrectly (but
2264 harmlessly) used int and sometimes off_t for these cases. Closes
2266 - Use the subsystems mechanism to manage the main event loop code.
2267 Closes ticket 30806.
2268 - Various simplifications and minor improvements to the circuit
2269 padding machines. Patch by Tobias Pulls. Closes tickets 31112
2272 o Documentation (hard-coded directories):
2273 - Improve the documentation for the DirAuthority and FallbackDir
2274 torrc options. Closes ticket 30955.
2276 o Documentation (tor.1 man page):
2277 - Fix typo in tor.1 man page: the option is "--help", not "-help".
2278 Fixes bug 31008; bugfix on 0.2.2.9-alpha.
2281 Changes in version 0.4.1.5 - 2019-08-20
2282 This is the first stable release in the 0.4.1.x series. This series
2283 adds experimental circuit-level padding, authenticated SENDME cells to
2284 defend against certain attacks, and several performance improvements
2285 to save on CPU consumption. It fixes bugs in bootstrapping and v3
2286 onion services. It also includes numerous smaller features and
2287 bugfixes on earlier versions.
2289 Per our support policy, we will support the 0.4.1.x series for nine
2290 months, or until three months after the release of a stable 0.4.2.x:
2291 whichever is longer. If you need longer-term support, please stick
2292 with 0.3.5.x, which will we plan to support until Feb 2022.
2294 Below are the changes since 0.4.1.4-rc. For a complete list of changes
2295 since 0.4.0.5, see the ReleaseNotes file.
2297 o Directory authority changes:
2298 - The directory authority "dizum" has a new IP address. Closes
2301 o Minor features (circuit padding logging):
2302 - Demote noisy client-side warn logs about circuit padding to
2303 protocol warnings. Add additional log messages and circuit ID
2304 fields to help with bug 30992 and any other future issues.
2306 o Minor bugfixes (circuit padding negotiation):
2307 - Bump the circuit padding protocol version to explicitly signify
2308 that the HS setup machine support is finalized in 0.4.1.x-stable.
2309 This also means that 0.4.1.x-alpha clients will not negotiate
2310 padding with 0.4.1.x-stable relays, and 0.4.1.x-stable clients
2311 will not negotiate padding with 0.4.1.x-alpha relays (or 0.4.0.x
2312 relays). Fixes bug 31356; bugfix on 0.4.1.1-alpha.
2314 o Minor bugfixes (circuit padding):
2315 - Ignore non-padding cells on padding circuits. This addresses
2316 various warning messages from subsystems that were not expecting
2317 padding circuits. Fixes bug 30942; bugfix on 0.4.1.1-alpha.
2319 o Minor bugfixes (clock skew detection):
2320 - Don't believe clock skew results from NETINFO cells that appear to
2321 arrive before we sent the VERSIONS cells they are responding to.
2322 Previously, we would accept them up to 3 minutes "in the past".
2323 Fixes bug 31343; bugfix on 0.2.4.4-alpha.
2325 o Minor bugfixes (compatibility, standards compliance):
2326 - Fix a bug that would invoke undefined behavior on certain
2327 operating systems when trying to asprintf() a string exactly
2328 INT_MAX bytes long. We don't believe this is exploitable, but it's
2329 better to fix it anyway. Fixes bug 31001; bugfix on 0.2.2.11-alpha.
2330 Found and fixed by Tobias Stoeckmann.
2332 o Minor bugfixes (compilation warning):
2333 - Fix a compilation warning on Windows about casting a function
2334 pointer for GetTickCount64(). Fixes bug 31374; bugfix
2337 o Minor bugfixes (compilation):
2338 - Avoid using labs() on time_t, which can cause compilation warnings
2339 on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
2341 o Minor bugfixes (distribution):
2342 - Do not ship any temporary files found in the
2343 scripts/maint/practracker directory. Fixes bug 31311; bugfix
2346 o Testing (continuous integration):
2347 - In Travis, make stem log a controller trace to the console, and
2348 tail stem's tor log after failure. Closes ticket 30591.
2349 - In Travis, only run the stem tests that use a tor binary. Closes
2353 Changes in version 0.4.1.4-rc - 2019-07-25
2354 Tor 0.4.1.4-rc fixes a few bugs from previous versions of Tor, and
2355 updates to a new list of fallback directories. If no new bugs are
2356 found, the next release in the 0.4.1.x serious should be stable.
2358 o Major bugfixes (circuit build, guard):
2359 - When considering upgrading circuits from "waiting for guard" to
2360 "open", always ignore circuits that are marked for close. Otherwise,
2361 we can end up in the situation where a subsystem is notified that
2362 a closing circuit has just opened, leading to undesirable
2363 behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha.
2365 o Minor features (continuous integration):
2366 - Our Travis configuration now uses Chutney to run some network
2367 integration tests automatically. Closes ticket 29280.
2369 o Minor features (fallback directory list):
2370 - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc
2371 in December 2018 (of which ~122 were still functional), with a
2372 list of 148 fallbacks (70 new, 78 existing, 79 removed) generated
2373 in June 2019. Closes ticket 28795.
2375 o Minor bugfixes (circuit padding):
2376 - On relays, properly check that a padding machine is absent before
2377 logging a warning about it being absent. Fixes bug 30649; bugfix
2379 - Add two NULL checks in unreachable places to silence Coverity (CID
2380 144729 and 1447291) and better future-proof ourselves. Fixes bug
2381 31024; bugfix on 0.4.1.1-alpha.
2383 o Minor bugfixes (crash on exit):
2384 - Avoid a set of possible code paths that could try to use freed
2385 memory in routerlist_free() while Tor was exiting. Fixes bug
2386 31003; bugfix on 0.1.2.2-alpha.
2388 o Minor bugfixes (logging):
2389 - Fix a conflict between the flag used for messaging-domain log
2390 messages, and the LD_NO_MOCK testing flag. Fixes bug 31080; bugfix
2393 o Minor bugfixes (memory leaks):
2394 - Fix a trivial memory leak when parsing an invalid value from a
2395 download schedule in the configuration. Fixes bug 30894; bugfix
2398 o Code simplification and refactoring:
2399 - Remove some dead code from circpad_machine_remove_token() to fix
2400 some Coverity warnings (CID 1447298). Fixes bug 31027; bugfix
2404 Changes in version 0.4.1.3-alpha - 2019-06-25
2405 Tor 0.4.1.3-alpha resolves numerous bugs left over from the previous
2406 alpha, most of them from earlier release series.
2408 o Major bugfixes (Onion service reachability):
2409 - Properly clean up the introduction point map when circuits change
2410 purpose from onion service circuits to pathbias, measurement, or
2411 other circuit types. This should fix some service-side instances
2412 of introduction point failure. Fixes bug 29034; bugfix
2415 o Minor features (geoip):
2416 - Update geoip and geoip6 to the June 10 2019 Maxmind GeoLite2
2417 Country database. Closes ticket 30852.
2419 o Minor features (logging):
2420 - Give a more useful assertion failure message if we think we have
2421 minherit() but we fail to make a region non-inheritable. Give a
2422 compile-time warning if our support for minherit() is incomplete.
2423 Closes ticket 30686.
2425 o Minor bugfixes (circuit isolation):
2426 - Fix a logic error that prevented the SessionGroup sub-option from
2427 being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha.
2429 o Minor bugfixes (continuous integration):
2430 - Allow the test-stem job to fail in Travis, because it sometimes
2431 hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha.
2432 - Skip test_rebind on macOS in Travis, because it is unreliable on
2433 macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
2434 - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment
2435 variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
2437 o Minor bugfixes (directory authorities):
2438 - Stop crashing after parsing an unknown descriptor purpose
2439 annotation. We think this bug can only be triggered by modifying a
2440 local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha.
2442 o Minor bugfixes (pluggable transports):
2443 - When running as a bridge with pluggable transports, always publish
2444 pluggable transport information in our extrainfo descriptor, even
2445 if ExtraInfoStatistics is 0. This information is needed by
2446 BridgeDB. Fixes bug 30956; bugfix on 0.4.1.1-alpha.
2449 - Mention URLs for Travis/Appveyor/Jenkins in ReleasingTor.md.
2450 Closes ticket 30630.
2453 Changes in version 0.4.1.2-alpha - 2019-06-06
2454 Tor 0.4.1.2-alpha resolves numerous bugs--some of them from the
2455 previous alpha, and some much older. It also contains minor testing
2456 improvements, and an improvement to the security of our authenticated
2457 SENDME implementation.
2459 o Major bugfixes (bridges):
2460 - Consider our directory information to have changed when our list
2461 of bridges changes. Previously, Tor would not re-compute the
2462 status of its directory information when bridges changed, and
2463 therefore would not realize that it was no longer able to build
2464 circuits. Fixes part of bug 29875.
2465 - Do not count previously configured working bridges towards our
2466 total of working bridges. Previously, when Tor's list of bridges
2467 changed, it would think that the old bridges were still usable,
2468 and delay fetching router descriptors for the new ones. Fixes part
2469 of bug 29875; bugfix on 0.3.0.1-alpha.
2471 o Major bugfixes (flow control, SENDME):
2472 - Decrement the stream-level package window after packaging a cell.
2473 Previously, it was done inside a log_debug() call, meaning that if
2474 debug logs were not enabled, the decrement would never happen, and
2475 thus the window would be out of sync with the other end point.
2476 Fixes bug 30628; bugfix on 0.4.1.1-alpha.
2478 o Major bugfixes (onion service reachability):
2479 - Properly clean up the introduction point map and associated state
2480 when circuits change purpose from onion service circuits to
2481 pathbias, measurement, or other circuit types. This may fix some
2482 instances of introduction point failure. Fixes bug 29034; bugfix
2485 o Minor features (authenticated SENDME):
2486 - Ensure that there is enough randomness on every circuit to prevent
2487 an attacker from successfully predicting the hashes they will need
2488 to include in authenticated SENDME cells. At a random interval, if
2489 we have not sent randomness already, we now leave some extra space
2490 at the end of a cell that we can fill with random bytes. Closes
2493 o Minor features (continuous integration):
2494 - When running coverage builds on Travis, we now set
2495 TOR_TEST_RNG_SEED, to avoid RNG-based coverage differences. Part
2498 o Minor features (maintenance):
2499 - Add a new "make autostyle" target that developers can use to apply
2500 all automatic Tor style and consistency conversions to the
2501 codebase. Closes ticket 30539.
2503 o Minor features (testing):
2504 - The circuitpadding tests now use a reproducible RNG implementation,
2505 so that if a test fails, we can learn why. Part of ticket 28878.
2506 - Tor's tests now support an environment variable, TOR_TEST_RNG_SEED,
2507 to set the RNG seed for tests that use a reproducible RNG. Part of
2509 - When running tests in coverage mode, take additional care to make
2510 our coverage deterministic, so that we can accurately track
2511 changes in code coverage. Closes ticket 30519.
2513 o Minor bugfixes (configuration, proxies):
2514 - Fix a bug that prevented us from supporting SOCKS5 proxies that
2515 want authentication along with configured (but unused!)
2516 ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.
2518 o Minor bugfixes (controller):
2519 - POSTDESCRIPTOR requests should work again. Previously, they were
2520 broken if a "purpose=" flag was specified. Fixes bug 30580; bugfix
2522 - Repair the HSFETCH command so that it works again. Previously, it
2523 expected a body when it shouldn't have. Fixes bug 30646; bugfix
2526 o Minor bugfixes (developer tooling):
2527 - Fix pre-push hook to allow fixup and squash commits when pushing
2528 to non-upstream git remote. Fixes bug 30286; bugfix
2531 o Minor bugfixes (directory authority):
2532 - Move the "bandwidth-file-headers" line in directory authority
2533 votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix
2536 o Minor bugfixes (NetBSD):
2537 - Fix usage of minherit() on NetBSD and other platforms that define
2538 MAP_INHERIT_{ZERO,NONE} instead of INHERIT_{ZERO,NONE}. Fixes bug
2539 30614; bugfix on 0.4.0.2-alpha. Patch from Taylor Campbell.
2541 o Minor bugfixes (out-of-memory handler):
2542 - When purging the DNS cache because of an out-of-memory condition,
2543 try purging just the older entries at first. Previously, we would
2544 always purge the whole thing. Fixes bug 29617; bugfix
2547 o Minor bugfixes (portability):
2548 - Avoid crashing in our tor_vasprintf() implementation on systems
2549 that define neither vasprintf() nor _vscprintf(). (This bug has
2550 been here long enough that we question whether people are running
2551 Tor on such systems, but we're applying the fix out of caution.)
2552 Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by
2555 o Minor bugfixes (shutdown, libevent, memory safety):
2556 - Avoid use-after-free bugs when shutting down, by making sure that
2557 we shut down libevent only after shutting down all of its users.
2558 We believe these are harmless in practice, since they only occur
2559 on the shutdown path, and do not involve any attacker-controlled
2560 data. Fixes bug 30629; bugfix on 0.4.1.1-alpha.
2562 o Minor bugfixes (static analysis):
2563 - Fix several spurious Coverity warnings about the unit tests, to
2564 lower our chances of missing real warnings in the future. Fixes
2565 bug 30150; bugfix on 0.3.5.1-alpha and various other Tor versions.
2568 - Specify torrc paths (with empty files) when launching tor in
2569 integration tests; refrain from reading user and system torrcs.
2570 Resolves issue 29702.
2573 Changes in version 0.4.1.1-alpha - 2019-05-22
2574 This is the first alpha in the 0.4.1.x series. It introduces
2575 lightweight circuit padding to make some onion-service circuits harder
2576 to distinguish, includes a new "authenticated SENDME" feature to make
2577 certain denial-of-service attacks more difficult, and improves
2578 performance in several areas.
2580 o Major features (circuit padding):
2581 - Onion service clients now add padding cells at the start of their
2582 INTRODUCE and RENDEZVOUS circuits, to make those circuits' traffic
2583 look more like general purpose Exit traffic. The overhead for this
2584 is 2 extra cells in each direction for RENDEZVOUS circuits, and 1
2585 extra upstream cell and 10 downstream cells for INTRODUCE
2586 circuits. This feature is only enabled when also supported by the
2587 circuit's middle node. (Clients may specify fixed middle nodes
2588 with the MiddleNodes option, and may force-disable this feature
2589 with the CircuitPadding option.) Closes ticket 28634.
2591 o Major features (code organization):
2592 - Tor now includes a generic publish-subscribe message-passing
2593 subsystem that we can use to organize intermodule dependencies. We
2594 hope to use this to reduce dependencies between modules that don't
2595 need to be related, and to generally simplify our codebase. Closes
2598 o Major features (controller protocol):
2599 - Controller commands are now parsed using a generalized parsing
2600 subsystem. Previously, each controller command was responsible for
2601 parsing its own input, which led to strange inconsistencies.
2602 Closes ticket 30091.
2604 o Major features (flow control):
2605 - Implement authenticated SENDMEs as detailed in proposal 289. A
2606 SENDME cell now includes the digest of the traffic that it
2607 acknowledges, so that once an end point receives the SENDME, it
2608 can confirm the other side's knowledge of the previous cells that
2609 were sent, and prevent certain types of denial-of-service attacks.
2610 This behavior is controlled by two new consensus parameters: see
2611 the proposal for more details. Fixes ticket 26288.
2613 o Major features (performance):
2614 - Our node selection algorithm now excludes nodes in linear time.
2615 Previously, the algorithm was quadratic, which could slow down
2616 heavily used onion services. Closes ticket 30307.
2618 o Major features (performance, RNG):
2619 - Tor now constructs a fast secure pseudorandom number generator for
2620 each thread, to use when performance is critical. This PRNG is
2621 based on AES-CTR, using a buffering construction similar to
2622 libottery and the (newer) OpenBSD arc4random() code. It
2623 outperforms OpenSSL 1.1.1a's CSPRNG by roughly a factor of 100 for
2624 small outputs. Although we believe it to be cryptographically
2625 strong, we are only using it when necessary for performance.
2626 Implements tickets 29023 and 29536.
2628 o Major bugfixes (onion service v3):
2629 - Fix an unreachable bug in which an introduction point could try to
2630 send an INTRODUCE_ACK with a status code that Trunnel would refuse
2631 to encode, leading the relay to assert(). We've consolidated the
2632 ABI values into Trunnel now. Fixes bug 30454; bugfix
2634 - Clients can now handle unknown status codes from INTRODUCE_ACK
2635 cells. (The NACK behavior will stay the same.) This will allow us
2636 to extend status codes in the future without breaking the normal
2637 client behavior. Fixes another part of bug 30454; bugfix
2640 o Minor features (circuit padding):
2641 - We now use a fast PRNG when scheduling circuit padding. Part of
2643 - Allow the padding machine designer to pick the edges of their
2644 histogram instead of trying to compute them automatically using an
2645 exponential formula. Resolves some undefined behavior in the case
2646 of small histograms and allows greater flexibility on machine
2647 design. Closes ticket 29298; bugfix on 0.4.0.1-alpha.
2648 - Allow circuit padding machines to hold a circuit open until they
2649 are done padding it. Closes ticket 28780.
2651 o Minor features (compile-time modules):
2652 - Add a "--list-modules" command to print a list of which compile-
2653 time modules are enabled. Closes ticket 30452.
2655 o Minor features (continuous integration):
2656 - Remove sudo configuration lines from .travis.yml as they are no
2657 longer needed with current Travis build environment. Resolves
2659 - In Travis, show stem's tor log after failure. Closes ticket 30234.
2661 o Minor features (controller):
2662 - Add onion service version 3 support to the HSFETCH command.
2663 Previously, only version 2 onion services were supported. Closes
2664 ticket 25417. Patch by Neel Chauhan.
2666 o Minor features (debugging):
2667 - Introduce tor_assertf() and tor_assertf_nonfatal() to enable
2668 logging of additional information during assert failure. Now we
2669 can use format strings to include information for trouble
2670 shooting. Resolves ticket 29662.
2672 o Minor features (defense in depth):
2673 - In smartlist_remove_keeporder(), set unused pointers to NULL, in
2674 case a bug causes them to be used later. Closes ticket 30176.
2675 Patch from Tobias Stoeckmann.
2676 - Tor now uses a cryptographically strong PRNG even for decisions
2677 that we do not believe are security-sensitive. Previously, for
2678 performance reasons, we had used a trivially predictable linear
2679 congruential generator algorithm for certain load-balancing and
2680 statistical sampling decisions. Now we use our fast RNG in those
2681 cases. Closes ticket 29542.
2683 o Minor features (developer tools):
2684 - Tor's "practracker" test script now checks for files and functions
2685 that seem too long and complicated. Existing overlong functions
2686 and files are accepted for now, but should eventually be
2687 refactored. Closes ticket 29221.
2688 - Add some scripts used for git maintenance to scripts/git. Closes
2690 - Call practracker from pre-push and pre-commit git hooks to let
2691 developers know if they made any code style violations. Closes
2693 - Add a script to check that each header has a well-formed and
2694 unique guard macro. Closes ticket 29756.
2696 o Minor features (geoip):
2697 - Update geoip and geoip6 to the May 13 2019 Maxmind GeoLite2
2698 Country database. Closes ticket 30522.
2700 o Minor features (HTTP tunnel):
2701 - Return an informative web page when the HTTPTunnelPort is used as
2702 an HTTP proxy. Closes ticket 27821, patch by "eighthave".
2704 o Minor features (IPv6, v3 onion services):
2705 - Make v3 onion services put IPv6 addresses in service descriptors.
2706 Before this change, service descriptors only contained IPv4
2707 addresses. Implements 26992.
2709 o Minor features (modularity):
2710 - The "--disable-module-dirauth" compile-time option now disables
2711 even more dirauth-only code. Closes ticket 30345.
2713 o Minor features (performance):
2714 - Use OpenSSL's implementations of SHA3 when available (in OpenSSL
2715 1.1.1 and later), since they tend to be faster than tiny-keccak.
2716 Closes ticket 28837.
2718 o Minor features (testing):
2719 - Tor's unit test code now contains helper functions to replace the
2720 PRNG with a deterministic or reproducible version for testing.
2721 Previously, various tests implemented this in various ways.
2722 Implements ticket 29732.
2723 - We now have a script, cov-test-determinism.sh, to identify places
2724 where our unit test coverage has become nondeterministic. Closes
2726 - Check that representative subsets of values of `int` and `unsigned
2727 int` can be represented by `void *`. Resolves issue 29537.
2729 o Minor bugfixes (bridge authority):
2730 - Bridge authorities now set bridges as running or non-running when
2731 about to dump their status to a file. Previously, they set bridges
2732 as running in response to a GETINFO command, but those shouldn't
2733 modify data structures. Fixes bug 24490; bugfix on 0.2.0.13-alpha.
2734 Patch by Neel Chauhan.
2736 o Minor bugfixes (channel padding statistics):
2737 - Channel padding write totals and padding-enabled totals are now
2738 counted properly in relay extrainfo descriptors. Fixes bug 29231;
2739 bugfix on 0.3.1.1-alpha.
2741 o Minor bugfixes (circuit padding):
2742 - Add a "CircuitPadding" torrc option to disable circuit padding.
2743 Fixes bug 28693; bugfix on 0.4.0.1-alpha.
2744 - Allow circuit padding machines to specify that they do not
2745 contribute much overhead, and provide consensus flags and torrc
2746 options to force clients to only use these low overhead machines.
2747 Fixes bug 29203; bugfix on 0.4.0.1-alpha.
2748 - Provide a consensus parameter to fully disable circuit padding, to
2749 be used in emergency network overload situations. Fixes bug 30173;
2750 bugfix on 0.4.0.1-alpha.
2751 - The circuit padding subsystem will no longer schedule padding if
2752 dormant mode is enabled. Fixes bug 28636; bugfix on 0.4.0.1-alpha.
2753 - Inspect a circuit-level cell queue before sending padding, to
2754 avoid sending padding while too much data is already queued. Fixes
2755 bug 29204; bugfix on 0.4.0.1-alpha.
2756 - Avoid calling monotime_absolute_usec() in circuit padding machines
2757 that do not use token removal or circuit RTT estimation. Fixes bug
2758 29085; bugfix on 0.4.0.1-alpha.
2760 o Minor bugfixes (compilation, unusual configurations):
2761 - Avoid failures when building with the ALL_BUGS_ARE_FATAL option
2762 due to missing declarations of abort(), and prevent other such
2763 failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.
2765 o Minor bugfixes (controller protocol):
2766 - Teach the controller parser to distinguish an object preceded by
2767 an argument list from one without. Previously, it couldn't
2768 distinguish an argument list from the first line of a multiline
2769 object. Fixes bug 29984; bugfix on 0.2.3.8-alpha.
2771 o Minor bugfixes (directory authority, ipv6):
2772 - Directory authorities with IPv6 support now always mark themselves
2773 as reachable via IPv6. Fixes bug 24338; bugfix on 0.2.4.1-alpha.
2774 Patch by Neel Chauhan.
2776 o Minor bugfixes (documentation):
2777 - Improve the documentation for using MapAddress with ".exit". Fixes
2778 bug 30109; bugfix on 0.1.0.1-rc.
2779 - Improve the monotonic time module and function documentation to
2780 explain what "monotonic" actually means, and document some results
2781 that have surprised people. Fixes bug 29640; bugfix
2783 - Use proper formatting when providing an example on quoting options
2784 that contain whitespace. Fixes bug 29635; bugfix on 0.2.3.18-rc.
2786 o Minor bugfixes (logging):
2787 - Do not log a warning when running with an OpenSSL version other
2788 than the one Tor was compiled with, if the two versions should be
2789 compatible. Previously, we would warn whenever the version was
2790 different. Fixes bug 30190; bugfix on 0.2.4.2-alpha.
2791 - Warn operators when the MyFamily option is set but ContactInfo is
2792 missing, as the latter should be set too. Fixes bug 25110; bugfix
2795 o Minor bugfixes (memory leak):
2796 - Avoid a minor memory leak that could occur on relays when failing
2797 to create a "keys" directory. Fixes bug 30148; bugfix
2800 o Minor bugfixes (onion services):
2801 - Avoid a GCC 9.1.1 warning (and possible crash depending on libc
2802 implemenation) when failing to load an onion service client
2803 authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha.
2804 - When refusing to launch a controller's HSFETCH request because of
2805 rate-limiting, respond to the controller with a new response,
2806 "QUERY_RATE_LIMITED". Previously, we would log QUERY_NO_HSDIR for
2807 this case. Fixes bug 28269; bugfix on 0.3.1.1-alpha. Patch by
2809 - When relaunching a circuit to a rendezvous service, mark the
2810 circuit as needing high-uptime routers as appropriate. Fixes bug
2811 17357; bugfix on 0.1.0.1-rc. Patch by Neel Chauhan.
2812 - Stop ignoring IPv6 link specifiers sent to v3 onion services.
2813 (IPv6 support for v3 onion services is still incomplete: see
2814 ticket 23493 for details.) Fixes bug 23588; bugfix on
2815 0.3.2.1-alpha. Patch by Neel Chauhan.
2817 o Minor bugfixes (onion services, performance):
2818 - When building circuits to onion services, call tor_addr_parse()
2819 less often. Previously, we called tor_addr_parse() in
2820 circuit_is_acceptable() even if its output wasn't used. This
2821 change should improve performance when building circuits. Fixes
2822 bug 22210; bugfix on 0.2.8.12. Patch by Neel Chauhan.
2824 o Minor bugfixes (performance):
2825 - When checking whether a node is a bridge, use a fast check to make
2826 sure that its identity is set. Previously, we used a constant-time
2827 check, which is not necessary in this case. Fixes bug 30308;
2828 bugfix on 0.3.5.1-alpha.
2830 o Minor bugfixes (pluggable transports):
2831 - Tor now sets TOR_PT_EXIT_ON_STDIN_CLOSE=1 for client transports as
2832 well as servers. Fixes bug 25614; bugfix on 0.2.7.1-alpha.
2834 o Minor bugfixes (probability distributions):
2835 - Refactor and improve parts of the probability distribution code
2836 that made Coverity complain. Fixes bug 29805; bugfix
2839 o Minor bugfixes (python):
2840 - Stop assuming that /usr/bin/python3 exists. For scripts that work
2841 with python2, use /usr/bin/python. Otherwise, use /usr/bin/env
2842 python3. Fixes bug 29913; bugfix on 0.2.5.3-alpha.
2844 o Minor bugfixes (relay):
2845 - When running as a relay, if IPv6Exit is set to 1 while ExitRelay
2846 is auto, act as if ExitRelay is 1. Previously, we would ignore
2847 IPv6Exit if ExitRelay was 0 or auto. Fixes bug 29613; bugfix on
2848 0.3.5.1-alpha. Patch by Neel Chauhan.
2850 o Minor bugfixes (stats):
2851 - When ExtraInfoStatistics is 0, stop including bandwidth usage
2852 statistics, GeoIPFile hashes, ServerTransportPlugin lines, and
2853 bridge statistics by country in extra-info documents. Fixes bug
2854 29018; bugfix on 0.2.4.1-alpha.
2856 o Minor bugfixes (testing):
2857 - Call setrlimit() to disable core dumps in test_bt_cl.c. Previously
2858 we used `ulimit -c` in test_bt.sh, which violates POSIX shell
2859 compatibility. Fixes bug 29061; bugfix on 0.3.5.1-alpha.
2860 - Fix some incorrect code in the v3 onion service unit tests. Fixes
2861 bug 29243; bugfix on 0.3.2.1-alpha.
2862 - In the "routerkeys/*" tests, check the return values of mkdir()
2863 for possible failures. Fixes bug 29939; bugfix on 0.2.7.2-alpha.
2864 Found by Coverity as CID 1444254.
2865 - Split test_utils_general() into several smaller test functions.
2866 This makes it easier to perform resource deallocation on assert
2867 failure, and fixes Coverity warnings CID 1444117 and CID 1444118.
2868 Fixes bug 29823; bugfix on 0.2.9.1-alpha.
2870 o Minor bugfixes (tor-resolve):
2871 - Fix a memory leak in tor-resolve that could happen if Tor gave it
2872 a malformed SOCKS response. (Memory leaks in tor-resolve don't
2873 actually matter, but it's good to fix them anyway.) Fixes bug
2874 30151; bugfix on 0.4.0.1-alpha.
2876 o Code simplification and refactoring:
2877 - Abstract out the low-level formatting of replies on the control
2878 port. Implements ticket 30007.
2879 - Add several assertions in an attempt to fix some Coverity
2880 warnings. Closes ticket 30149.
2881 - Introduce a connection_dir_buf_add() helper function that checks
2882 for compress_state of dir_connection_t and automatically writes a
2883 string to directory connection with or without compression.
2884 Resolves issue 28816.
2885 - Make the base32_decode() API return the number of bytes written,
2886 for consistency with base64_decode(). Closes ticket 28913.
2887 - Move most relay-only periodic events out of mainloop.c into the
2888 relay subsystem. Closes ticket 30414.
2889 - Refactor and encapsulate parts of the codebase that manipulate
2890 crypt_path_t objects. Resolves issue 30236.
2891 - Refactor several places in our code that Coverity incorrectly
2892 believed might have memory leaks. Closes ticket 30147.
2893 - Remove redundant return values in crypto_format, and the
2894 associated return value checks elsewhere in the code. Make the
2895 implementations in crypto_format consistent, and remove redundant
2896 code. Resolves ticket 29660.
2897 - Rename tor_mem_is_zero() to fast_mem_is_zero(), to emphasize that
2898 it is not a constant-time function. Closes ticket 30309.
2899 - Replace hs_desc_link_specifier_t with link_specifier_t, and remove
2900 all hs_desc_link_specifier_t-specific code. Fixes bug 22781;
2901 bugfix on 0.3.2.1-alpha.
2902 - Simplify v3 onion service link specifier handling code. Fixes bug
2903 23576; bugfix on 0.3.2.1-alpha.
2904 - Split crypto_digest.c into NSS code, OpenSSL code, and shared
2905 code. Resolves ticket 29108.
2906 - Split control.c into several submodules, in preparation for
2907 distributing its current responsibilities throughout the codebase.
2908 Closes ticket 29894.
2909 - Start to move responsibility for knowing about periodic events to
2910 the appropriate subsystems, so that the mainloop doesn't need to
2911 know all the periodic events in the rest of the codebase.
2912 Implements tickets 30293 and 30294.
2915 - Document how to find git commits and tags for bug fixes in
2916 CodingStandards.md. Update some file documentation. Closes
2920 - Remove the linux-tor-prio.sh script from contrib/operator-tools
2921 directory. Resolves issue 29434.
2922 - Remove the obsolete OpenSUSE initscript. Resolves issue 30076.
2923 - Remove the obsolete script at contrib/dist/tor.sh.in. Resolves
2926 o Code simplification and refactoring (shell scripts):
2927 - Clean up many of our shell scripts to fix shellcheck warnings.
2928 These include autogen.sh (ticket 26069), test_keygen.sh (ticket
2929 29062), test_switch_id.sh (ticket 29065), test_rebind.sh (ticket
2930 29063), src/test/fuzz/minimize.sh (ticket 30079), test_rust.sh
2931 (ticket 29064), torify (ticket 29070), asciidoc-helper.sh (29926),
2932 fuzz_multi.sh (30077), fuzz_static_testcases.sh (ticket 29059),
2933 nagios-check-tor-authority-cert (ticket 29071),
2934 src/test/fuzz/fixup_filenames.sh (ticket 30078), test-network.sh
2935 (ticket 29060), test_key_expiration.sh (ticket 30002),
2936 zero_length_keys.sh (ticket 29068), and test_workqueue_*.sh
2939 o Testing (chutney):
2940 - In "make test-network-all", test IPv6-only v3 single onion
2941 services, using the chutney network single-onion-v23-ipv6-md.
2942 Closes ticket 27251.
2945 Changes in version 0.4.0.5 - 2019-05-02
2946 This is the first stable release in the 0.4.0.x series. It contains
2947 improvements for power management and bootstrap reporting, as well as
2948 preliminary backend support for circuit padding to prevent some kinds
2949 of traffic analysis. It also continues our work in refactoring Tor for
2950 long-term maintainability.
2952 Per our support policy, we will support the 0.4.0.x series for nine
2953 months, or until three months after the release of a stable 0.4.1.x:
2954 whichever is longer. If you need longer-term support, please stick
2955 with 0.3.5.x, which will we plan to support until Feb 2022.
2957 Below are the changes since 0.4.0.4-rc. For a complete list of changes
2958 since 0.3.5.7, see the ReleaseNotes file.
2960 o Minor features (continuous integration):
2961 - In Travis, tell timelimit to use stem's backtrace signals, and
2962 launch python directly from timelimit, so python receives the
2963 signals from timelimit, rather than make. Closes ticket 30117.
2965 o Minor features (diagnostic):
2966 - Add more diagnostic log messages in an attempt to solve the issue
2967 of NUL bytes appearing in a microdescriptor cache. Related to
2970 o Minor features (testing):
2971 - Use the approx_time() function when setting the "Expires" header
2972 in directory replies, to make them more testable. Needed for
2975 o Minor bugfixes (rust):
2976 - Abort on panic in all build profiles, instead of potentially
2977 unwinding into C code. Fixes bug 27199; bugfix on 0.3.3.1-alpha.
2979 o Minor bugfixes (shellcheck):
2980 - Look for scripts in their correct locations during "make
2981 shellcheck". Previously we had looked in the wrong place during
2982 out-of-tree builds. Fixes bug 30263; bugfix on 0.4.0.1-alpha.
2984 o Minor bugfixes (testing):
2985 - Check the time in the "Expires" header using approx_time(). Fixes
2986 bug 30001; bugfix on 0.4.0.4-rc.
2988 o Minor bugfixes (UI):
2989 - Lower log level of unlink() errors during bootstrap. Fixes bug
2990 29930; bugfix on 0.4.0.1-alpha.
2993 Changes in version 0.4.0.4-rc - 2019-04-11
2994 Tor 0.4.0.4-rc is the first release candidate in its series; it fixes
2995 several bugs from earlier versions, including some that had affected
2996 stability, and one that prevented relays from working with NSS.
2998 o Major bugfixes (NSS, relay):
2999 - When running with NSS, disable TLS 1.2 ciphersuites that use
3000 SHA384 for their PRF. Due to an NSS bug, the TLS key exporters for
3001 these ciphersuites don't work -- which caused relays to fail to
3002 handshake with one another when these ciphersuites were enabled.
3003 Fixes bug 29241; bugfix on 0.3.5.1-alpha.
3005 o Minor features (bandwidth authority):
3006 - Make bandwidth authorities ignore relays that are reported in the
3007 bandwidth file with the flag "vote=0". This change allows us to
3008 report unmeasured relays for diagnostic reasons without including
3009 their bandwidth in the bandwidth authorities' vote. Closes
3011 - When a directory authority is using a bandwidth file to obtain the
3012 bandwidth values that will be included in the next vote, serve
3013 this bandwidth file at /tor/status-vote/next/bandwidth. Closes
3016 o Minor features (circuit padding):
3017 - Stop warning about undefined behavior in the probability
3018 distribution tests. Float division by zero may technically be
3019 undefined behavior in C, but it's well defined in IEEE 754.
3020 Partial backport of 29298. Closes ticket 29527; bugfix
3023 o Minor features (continuous integration):
3024 - On Travis Rust builds, cleanup Rust registry and refrain from
3025 caching the "target/" directory to speed up builds. Resolves
3028 o Minor features (dormant mode):
3029 - Add a DormantCanceledByStartup option to tell Tor that it should
3030 treat a startup event as cancelling any previous dormant state.
3031 Integrators should use this option with caution: it should only be
3032 used if Tor is being started because of something that the user
3033 did, and not if Tor is being automatically started in the
3034 background. Closes ticket 29357.
3036 o Minor features (geoip):
3037 - Update geoip and geoip6 to the April 2 2019 Maxmind GeoLite2
3038 Country database. Closes ticket 29992.
3040 o Minor features (NSS, diagnostic):
3041 - Try to log an error from NSS (if there is any) and a more useful
3042 description of our situation if we are using NSS and a call to
3043 SSL_ExportKeyingMaterial() fails. Diagnostic for ticket 29241.
3045 o Minor bugfixes (security):
3046 - Fix a potential double free bug when reading huge bandwidth files.
3047 The issue is not exploitable in the current Tor network because
3048 the vulnerable code is only reached when directory authorities
3049 read bandwidth files, but bandwidth files come from a trusted
3050 source (usually the authorities themselves). Furthermore, the
3051 issue is only exploitable in rare (non-POSIX) 32-bit architectures,
3052 which are not used by any of the current authorities. Fixes bug
3053 30040; bugfix on 0.3.5.1-alpha. Bug found and fixed by
3055 - Verify in more places that we are not about to create a buffer
3056 with more than INT_MAX bytes, to avoid possible OOB access in the
3057 event of bugs. Fixes bug 30041; bugfix on 0.2.0.16. Found and
3058 fixed by Tobias Stoeckmann.
3060 o Minor bugfix (continuous integration):
3061 - Reset coverage state on disk after Travis CI has finished. This
3062 should prevent future coverage merge errors from causing the test
3063 suite for the "process" subsystem to fail. The process subsystem
3064 was introduced in 0.4.0.1-alpha. Fixes bug 29036; bugfix
3066 - Terminate test-stem if it takes more than 9.5 minutes to run.
3067 (Travis terminates the job after 10 minutes of no output.)
3068 Diagnostic for 29437. Fixes bug 30011; bugfix on 0.3.5.4-alpha.
3070 o Minor bugfixes (bootstrap reporting):
3071 - During bootstrap reporting, correctly distinguish pluggable
3072 transports from plain proxies. Fixes bug 28925; bugfix
3075 o Minor bugfixes (C correctness):
3076 - Fix an unlikely memory leak in consensus_diff_apply(). Fixes bug
3077 29824; bugfix on 0.3.1.1-alpha. This is Coverity warning
3080 o Minor bugfixes (circuitpadding testing):
3081 - Minor tweaks to avoid rare test failures related to timers and
3082 monotonic time. Fixes bug 29500; bugfix on 0.4.0.1-alpha.
3084 o Minor bugfixes (directory authorities):
3085 - Actually include the bandwidth-file-digest line in directory
3086 authority votes. Fixes bug 29959; bugfix on 0.4.0.2-alpha.
3088 o Minor bugfixes (logging):
3089 - On Windows, when errors cause us to reload a consensus from disk,
3090 tell the user that we are retrying at log level "notice".
3091 Previously we only logged this information at "info", which was
3092 confusing because the errors themselves were logged at "warning".
3093 Improves previous fix for 28614. Fixes bug 30004; bugfix
3096 o Minor bugfixes (pluggable transports):
3097 - Restore old behavior when it comes to discovering the path of a
3098 given Pluggable Transport executable file. A change in
3099 0.4.0.1-alpha had broken this behavior on paths containing a
3100 space. Fixes bug 29874; bugfix on 0.4.0.1-alpha.
3102 o Minor bugfixes (testing):
3103 - Backport the 0.3.4 src/test/test-network.sh to 0.2.9. We need a
3104 recent test-network.sh to use new chutney features in CI. Fixes
3105 bug 29703; bugfix on 0.2.9.1-alpha.
3106 - Fix a test failure on Windows caused by an unexpected "BUG"
3107 warning in our tests for tor_gmtime_r(-1). Fixes bug 29922; bugfix
3110 o Minor bugfixes (TLS protocol):
3111 - When classifying a client's selection of TLS ciphers, if the
3112 client ciphers are not yet available, do not cache the result.
3113 Previously, we had cached the unavailability of the cipher list
3114 and never looked again, which in turn led us to assume that the
3115 client only supported the ancient V1 link protocol. This, in turn,
3116 was causing Stem integration tests to stall in some cases. Fixes
3117 bug 30021; bugfix on 0.2.4.8-alpha.
3119 o Code simplification and refactoring:
3120 - Introduce a connection_dir_buf_add() helper function that detects
3121 whether compression is in use, and adds a string accordingly.
3122 Resolves issue 28816.
3123 - Refactor handle_get_next_bandwidth() to use
3124 connection_dir_buf_add(). Implements ticket 29897.
3127 - Clarify that Tor performs stream isolation among *Port listeners
3128 by default. Resolves issue 29121.
3131 Changes in version 0.4.0.3-alpha - 2019-03-22
3132 Tor 0.4.0.3-alpha is the third in its series; it fixes several small
3133 bugs from earlier versions.
3135 o Minor features (address selection):
3136 - Treat the subnet 100.64.0.0/10 as public for some purposes;
3137 private for others. This subnet is the RFC 6598 (Carrier Grade
3138 NAT) IP range, and is deployed by many ISPs as an alternative to
3139 RFC 1918 that does not break existing internal networks. Tor now
3140 blocks SOCKS and control ports on these addresses and warns users
3141 if client ports or ExtORPorts are listening on a RFC 6598 address.
3142 Closes ticket 28525. Patch by Neel Chauhan.
3144 o Minor features (geoip):
3145 - Update geoip and geoip6 to the March 4 2019 Maxmind GeoLite2
3146 Country database. Closes ticket 29666.
3148 o Minor bugfixes (circuitpadding):
3149 - Inspect the circuit-level cell queue before sending padding, to
3150 avoid sending padding when too much data is queued. Fixes bug
3151 29204; bugfix on 0.4.0.1-alpha.
3153 o Minor bugfixes (logging):
3154 - Correct a misleading error message when IPv4Only or IPv6Only is
3155 used but the resolved address can not be interpreted as an address
3156 of the specified IP version. Fixes bug 13221; bugfix on
3157 0.2.3.9-alpha. Patch from Kris Katterjohn.
3158 - Log the correct port number for listening sockets when "auto" is
3159 used to let Tor pick the port number. Previously, port 0 was
3160 logged instead of the actual port number. Fixes bug 29144; bugfix
3161 on 0.3.5.1-alpha. Patch from Kris Katterjohn.
3162 - Stop logging a BUG() warning when Tor is waiting for exit
3163 descriptors. Fixes bug 28656; bugfix on 0.3.5.1-alpha.
3165 o Minor bugfixes (memory management):
3166 - Refactor the shared random state's memory management so that it
3167 actually takes ownership of the shared random value pointers.
3168 Fixes bug 29706; bugfix on 0.2.9.1-alpha.
3170 o Minor bugfixes (memory management, testing):
3171 - Stop leaking parts of the shared random state in the shared-random
3172 unit tests. Fixes bug 29599; bugfix on 0.2.9.1-alpha.
3174 o Minor bugfixes (pluggable transports):
3175 - Fix an assertion failure crash bug when a pluggable transport is
3176 terminated during the bootstrap phase. Fixes bug 29562; bugfix
3179 o Minor bugfixes (Rust, protover):
3180 - Add a missing "Padding" value to the Rust implementation of
3181 protover. Fixes bug 29631; bugfix on 0.4.0.1-alpha.
3183 o Minor bugfixes (single onion services):
3184 - Allow connections to single onion services to remain idle without
3185 being disconnected. Previously, relays acting as rendezvous points
3186 for single onion services were mistakenly closing idle rendezvous
3187 circuits after 60 seconds, thinking that they were unused
3188 directory-fetching circuits that had served their purpose. Fixes
3189 bug 29665; bugfix on 0.2.1.26.
3191 o Minor bugfixes (stats):
3192 - When ExtraInfoStatistics is 0, stop including PaddingStatistics in
3193 relay and bridge extra-info documents. Fixes bug 29017; bugfix
3196 o Minor bugfixes (testing):
3197 - Downgrade some LOG_ERR messages in the address/* tests to
3198 warnings. The LOG_ERR messages were occurring when we had no
3199 configured network. We were failing the unit tests, because we
3200 backported 28668 to 0.3.5.8, but did not backport 29530. Fixes bug
3201 29530; bugfix on 0.3.5.8.
3202 - Fix our gcov wrapper script to look for object files at the
3203 correct locations. Fixes bug 29435; bugfix on 0.3.5.1-alpha.
3204 - Decrease the false positive rate of stochastic probability
3205 distribution tests. Fixes bug 29693; bugfix on 0.4.0.1-alpha.
3207 o Minor bugfixes (Windows, CI):
3208 - Skip the Appveyor 32-bit Windows Server 2016 job, and 64-bit
3209 Windows Server 2012 R2 job. The remaining 2 jobs still provide
3210 coverage of 64/32-bit, and Windows Server 2016/2012 R2. Also set
3211 fast_finish, so failed jobs terminate the build immediately. Fixes
3212 bug 29601; bugfix on 0.3.5.4-alpha.
3215 Changes in version 0.3.5.8 - 2019-02-21
3216 Tor 0.3.5.8 backports several fixes from later releases, including fixes
3217 for an annoying SOCKS-parsing bug that affected users in earlier 0.3.5.x
3220 It also includes a fix for a medium-severity security bug affecting Tor
3221 0.3.2.1-alpha and later. All Tor instances running an affected release
3222 should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
3224 o Major bugfixes (cell scheduler, KIST, security):
3225 - Make KIST consider the outbuf length when computing what it can
3226 put in the outbuf. Previously, KIST acted as though the outbuf
3227 were empty, which could lead to the outbuf becoming too full. It
3228 is possible that an attacker could exploit this bug to cause a Tor
3229 client or relay to run out of memory and crash. Fixes bug 29168;
3230 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
3231 TROVE-2019-001 and CVE-2019-8955.
3233 o Major bugfixes (networking, backport from 0.4.0.2-alpha):
3234 - Gracefully handle empty username/password fields in SOCKS5
3235 username/password auth message and allow SOCKS5 handshake to
3236 continue. Previously, we had rejected these handshakes, breaking
3237 certain applications. Fixes bug 29175; bugfix on 0.3.5.1-alpha.
3239 o Minor features (compilation, backport from 0.4.0.2-alpha):
3240 - Compile correctly when OpenSSL is built with engine support
3241 disabled, or with deprecated APIs disabled. Closes ticket 29026.
3242 Patches from "Mangix".
3244 o Minor features (geoip):
3245 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
3246 Country database. Closes ticket 29478.
3248 o Minor features (testing, backport from 0.4.0.2-alpha):
3249 - Treat all unexpected ERR and BUG messages as test failures. Closes
3252 o Minor bugfixes (onion service v3, client, backport from 0.4.0.1-alpha):
3253 - Stop logging a "BUG()" warning and stacktrace when we find a SOCKS
3254 connection waiting for a descriptor that we actually have in the
3255 cache. It turns out that this can actually happen, though it is
3256 rare. Now, tor will recover and retry the descriptor. Fixes bug
3257 28669; bugfix on 0.3.2.4-alpha.
3259 o Minor bugfixes (IPv6, backport from 0.4.0.1-alpha):
3260 - Fix tor_ersatz_socketpair on IPv6-only systems. Previously, the
3261 IPv6 socket was bound using an address family of AF_INET instead
3262 of AF_INET6. Fixes bug 28995; bugfix on 0.3.5.1-alpha. Patch from
3265 o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
3266 - Update Cargo.lock file to match the version made by the latest
3267 version of Rust, so that "make distcheck" will pass again. Fixes
3268 bug 29244; bugfix on 0.3.3.4-alpha.
3270 o Minor bugfixes (client, clock skew, backport from 0.4.0.1-alpha):
3271 - Select guards even if the consensus has expired, as long as the
3272 consensus is still reasonably live. Fixes bug 24661; bugfix
3275 o Minor bugfixes (compilation, backport from 0.4.0.1-alpha):
3276 - Compile correctly on OpenBSD; previously, we were missing some
3277 headers required in order to detect it properly. Fixes bug 28938;
3278 bugfix on 0.3.5.1-alpha. Patch from Kris Katterjohn.
3280 o Minor bugfixes (documentation, backport from 0.4.0.2-alpha):
3281 - Describe the contents of the v3 onion service client authorization
3282 files correctly: They hold public keys, not private keys. Fixes
3283 bug 28979; bugfix on 0.3.5.1-alpha. Spotted by "Felixix".
3285 o Minor bugfixes (logging, backport from 0.4.0.1-alpha):
3286 - Rework rep_hist_log_link_protocol_counts() to iterate through all
3287 link protocol versions when logging incoming/outgoing connection
3288 counts. Tor no longer skips version 5, and we won't have to
3289 remember to update this function when new link protocol version is
3290 developed. Fixes bug 28920; bugfix on 0.2.6.10.
3292 o Minor bugfixes (logging, backport from 0.4.0.2-alpha):
3293 - Log more information at "warning" level when unable to read a
3294 private key; log more information at "info" level when unable to
3295 read a public key. We had warnings here before, but they were lost
3296 during our NSS work. Fixes bug 29042; bugfix on 0.3.5.1-alpha.
3298 o Minor bugfixes (misc, backport from 0.4.0.2-alpha):
3299 - The amount of total available physical memory is now determined
3300 using the sysctl identifier HW_PHYSMEM (rather than HW_USERMEM)
3301 when it is defined and a 64-bit variant is not available. Fixes
3302 bug 28981; bugfix on 0.2.5.4-alpha. Patch from Kris Katterjohn.
3304 o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
3305 - Avoid crashing if ClientOnionAuthDir (incorrectly) contains more
3306 than one private key for a hidden service. Fixes bug 29040; bugfix
3308 - In hs_cache_store_as_client() log an HSDesc we failed to parse at
3309 "debug" level. Tor used to log it as a warning, which caused very
3310 long log lines to appear for some users. Fixes bug 29135; bugfix
3312 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
3313 as a warning. Instead, log it as a protocol warning, because there
3314 is nothing that relay operators can do to fix it. Fixes bug 29029;
3315 bugfix on 0.2.5.7-rc.
3317 o Minor bugfixes (tests, directory clients, backport from 0.4.0.1-alpha):
3318 - Mark outdated dirservers when Tor only has a reasonably live
3319 consensus. Fixes bug 28569; bugfix on 0.3.2.5-alpha.
3321 o Minor bugfixes (tests, backport from 0.4.0.2-alpha):
3322 - Detect and suppress "bug" warnings from the util/time test on
3323 Windows. Fixes bug 29161; bugfix on 0.2.9.3-alpha.
3324 - Do not log an error-level message if we fail to find an IPv6
3325 network interface from the unit tests. Fixes bug 29160; bugfix
3328 o Minor bugfixes (usability, backport from 0.4.0.1-alpha):
3329 - Stop saying "Your Guard ..." in pathbias_measure_{use,close}_rate().
3330 Some users took this phrasing to mean that the mentioned guard was
3331 under their control or responsibility, which it is not. Fixes bug
3332 28895; bugfix on Tor 0.3.0.1-alpha.
3335 Changes in version 0.3.4.11 - 2019-02-21
3336 Tor 0.3.4.11 is the third stable release in its series. It includes
3337 a fix for a medium-severity security bug affecting Tor 0.3.2.1-alpha and
3338 later. All Tor instances running an affected release should upgrade to
3339 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
3341 o Major bugfixes (cell scheduler, KIST, security):
3342 - Make KIST consider the outbuf length when computing what it can
3343 put in the outbuf. Previously, KIST acted as though the outbuf
3344 were empty, which could lead to the outbuf becoming too full. It
3345 is possible that an attacker could exploit this bug to cause a Tor
3346 client or relay to run out of memory and crash. Fixes bug 29168;
3347 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
3348 TROVE-2019-001 and CVE-2019-8955.
3350 o Minor features (geoip):
3351 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
3352 Country database. Closes ticket 29478.
3354 o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
3355 - Update Cargo.lock file to match the version made by the latest
3356 version of Rust, so that "make distcheck" will pass again. Fixes
3357 bug 29244; bugfix on 0.3.3.4-alpha.
3359 o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
3360 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
3361 as a warning. Instead, log it as a protocol warning, because there
3362 is nothing that relay operators can do to fix it. Fixes bug 29029;
3363 bugfix on 0.2.5.7-rc.
3366 Changes in version 0.3.3.12 - 2019-02-21
3367 Tor 0.3.3.12 fixes a medium-severity security bug affecting Tor
3368 0.3.2.1-alpha and later. All Tor instances running an affected release
3369 should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
3371 This release marks the end of support for the Tor 0.3.3.x series. We
3372 recommend that users switch to either the Tor 0.3.4 series (supported
3373 until at least 10 June 2019), or the Tor 0.3.5 series, which will
3374 receive long-term support until at least 1 Feb 2022.
3376 o Major bugfixes (cell scheduler, KIST, security):
3377 - Make KIST consider the outbuf length when computing what it can
3378 put in the outbuf. Previously, KIST acted as though the outbuf
3379 were empty, which could lead to the outbuf becoming too full. It
3380 is possible that an attacker could exploit this bug to cause a Tor
3381 client or relay to run out of memory and crash. Fixes bug 29168;
3382 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
3383 TROVE-2019-001 and CVE-2019-8955.
3385 o Minor features (geoip):
3386 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
3387 Country database. Closes ticket 29478.
3389 o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
3390 - Update Cargo.lock file to match the version made by the latest
3391 version of Rust, so that "make distcheck" will pass again. Fixes
3392 bug 29244; bugfix on 0.3.3.4-alpha.
3394 o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
3395 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
3396 as a warning. Instead, log it as a protocol warning, because there
3397 is nothing that relay operators can do to fix it. Fixes bug 29029;
3398 bugfix on 0.2.5.7-rc.
3401 Changes in version 0.4.0.2-alpha - 2019-02-21
3402 Tor 0.4.0.2-alpha is the second alpha in its series; it fixes several
3403 bugs from earlier versions, including several that had broken
3404 backward compatibility.
3406 It also includes a fix for a medium-severity security bug affecting Tor
3407 0.3.2.1-alpha and later. All Tor instances running an affected release
3408 should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
3410 o Major bugfixes (cell scheduler, KIST, security):
3411 - Make KIST consider the outbuf length when computing what it can
3412 put in the outbuf. Previously, KIST acted as though the outbuf
3413 were empty, which could lead to the outbuf becoming too full. It
3414 is possible that an attacker could exploit this bug to cause a Tor
3415 client or relay to run out of memory and crash. Fixes bug 29168;
3416 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
3417 TROVE-2019-001 and CVE-2019-8955.
3419 o Major bugfixes (networking):
3420 - Gracefully handle empty username/password fields in SOCKS5
3421 username/password auth messsage and allow SOCKS5 handshake to
3422 continue. Previously, we had rejected these handshakes, breaking
3423 certain applications. Fixes bug 29175; bugfix on 0.3.5.1-alpha.
3425 o Major bugfixes (windows, startup):
3426 - When reading a consensus file from disk, detect whether it was
3427 written in text mode, and re-read it in text mode if so. Always
3428 write consensus files in binary mode so that we can map them into
3429 memory later. Previously, we had written in text mode, which
3430 confused us when we tried to map the file on windows. Fixes bug
3431 28614; bugfix on 0.4.0.1-alpha.
3433 o Minor features (compilation):
3434 - Compile correctly when OpenSSL is built with engine support
3435 disabled, or with deprecated APIs disabled. Closes ticket 29026.
3436 Patches from "Mangix".
3438 o Minor features (developer tooling):
3439 - Check that bugfix versions in changes files look like Tor versions
3440 from the versions spec. Warn when bugfixes claim to be on a future
3441 release. Closes ticket 27761.
3442 - Provide a git pre-commit hook that disallows committing if we have
3443 any failures in our code and changelog formatting checks. It is
3444 now available in scripts/maint/pre-commit.git-hook. Implements
3447 o Minor features (directory authority):
3448 - When a directory authority is using a bandwidth file to obtain
3449 bandwidth values, include the digest of that file in the vote.
3450 Closes ticket 26698.
3452 o Minor features (geoip):
3453 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
3454 Country database. Closes ticket 29478.
3456 o Minor features (testing):
3457 - Treat all unexpected ERR and BUG messages as test failures. Closes
3460 o Minor bugfixes (build, compatibility, rust):
3461 - Update Cargo.lock file to match the version made by the latest
3462 version of Rust, so that "make distcheck" will pass again. Fixes
3463 bug 29244; bugfix on 0.3.3.4-alpha.
3465 o Minor bugfixes (compilation):
3466 - Fix compilation warnings in test_circuitpadding.c. Fixes bug
3467 29169; bugfix on 0.4.0.1-alpha.
3468 - Silence a compiler warning in test-memwipe.c on OpenBSD. Fixes bug
3469 29145; bugfix on 0.2.9.3-alpha. Patch from Kris Katterjohn.
3471 o Minor bugfixes (documentation):
3472 - Describe the contents of the v3 onion service client authorization
3473 files correctly: They hold public keys, not private keys. Fixes
3474 bug 28979; bugfix on 0.3.5.1-alpha. Spotted by "Felixix".
3476 o Minor bugfixes (linux seccomp sandbox):
3477 - Fix startup crash when experimental sandbox support is enabled.
3478 Fixes bug 29150; bugfix on 0.4.0.1-alpha. Patch by Peter Gerber.
3480 o Minor bugfixes (logging):
3481 - Avoid logging that we are relaxing a circuit timeout when that
3482 timeout is fixed. Fixes bug 28698; bugfix on 0.2.4.7-alpha.
3483 - Log more information at "warning" level when unable to read a
3484 private key; log more information at "info" level when unable to
3485 read a public key. We had warnings here before, but they were lost
3486 during our NSS work. Fixes bug 29042; bugfix on 0.3.5.1-alpha.
3488 o Minor bugfixes (misc):
3489 - The amount of total available physical memory is now determined
3490 using the sysctl identifier HW_PHYSMEM (rather than HW_USERMEM)
3491 when it is defined and a 64-bit variant is not available. Fixes
3492 bug 28981; bugfix on 0.2.5.4-alpha. Patch from Kris Katterjohn.
3494 o Minor bugfixes (onion services):
3495 - Avoid crashing if ClientOnionAuthDir (incorrectly) contains more
3496 than one private key for a hidden service. Fixes bug 29040; bugfix
3498 - In hs_cache_store_as_client() log an HSDesc we failed to parse at
3499 "debug" level. Tor used to log it as a warning, which caused very
3500 long log lines to appear for some users. Fixes bug 29135; bugfix
3502 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
3503 as a warning. Instead, log it as a protocol warning, because there
3504 is nothing that relay operators can do to fix it. Fixes bug 29029;
3505 bugfix on 0.2.5.7-rc.
3507 o Minor bugfixes (scheduler):
3508 - When re-adding channels to the pending list, check the correct
3509 channel's sched_heap_idx. This issue has had no effect in mainline
3510 Tor, but could have led to bugs down the road in improved versions
3511 of our circuit scheduling code. Fixes bug 29508; bugfix
3514 o Minor bugfixes (tests):
3515 - Fix intermittent failures on an adaptive padding test. Fixes one
3516 case of bug 29122; bugfix on 0.4.0.1-alpha.
3517 - Disable an unstable circuit-padding test that was failing
3518 intermittently because of an ill-defined small histogram. Such
3519 histograms will be allowed again after 29298 is implemented. Fixes
3520 a second case of bug 29122; bugfix on 0.4.0.1-alpha.
3521 - Detect and suppress "bug" warnings from the util/time test on
3522 Windows. Fixes bug 29161; bugfix on 0.2.9.3-alpha.
3523 - Do not log an error-level message if we fail to find an IPv6
3524 network interface from the unit tests. Fixes bug 29160; bugfix
3528 - In the manpage entry describing MapAddress torrc setting, use
3529 example IP addresses from ranges specified for use in documentation
3530 by RFC 5737. Resolves issue 28623.
3533 - Remove the old check-tor script. Resolves issue 29072.
3536 Changes in version 0.4.0.1-alpha - 2019-01-18
3537 Tor 0.4.0.1-alpha is the first release in the new 0.4.0.x series. It
3538 introduces improved features for power and bandwidth conservation,
3539 more accurate reporting of bootstrap progress for user interfaces, and
3540 an experimental backend for an exciting new adaptive padding feature.
3541 There is also the usual assortment of bugfixes and minor features, all
3544 o Major features (battery management, client, dormant mode):
3545 - When Tor is running as a client, and it is unused for a long time,
3546 it can now enter a "dormant" state. When Tor is dormant, it avoids
3547 network and CPU activity until it is reawoken either by a user
3548 request or by a controller command. For more information, see the
3549 configuration options starting with "Dormant". Implements tickets
3551 - The client's memory of whether it is "dormant", and how long it
3552 has spent idle, persists across invocations. Implements
3554 - There is a DormantOnFirstStartup option that integrators can use
3555 if they expect that in many cases, Tor will be installed but
3558 o Major features (bootstrap reporting):
3559 - When reporting bootstrap progress, report the first connection
3560 uniformly, regardless of whether it's a connection for building
3561 application circuits. This allows finer-grained reporting of early
3562 progress than previously possible, with the improvements of ticket
3563 27169. Closes tickets 27167 and 27103. Addresses ticket 27308.
3564 - When reporting bootstrap progress, treat connecting to a proxy or
3565 pluggable transport as separate from having successfully used that
3566 proxy or pluggable transport to connect to a relay. Closes tickets
3569 o Major features (circuit padding):
3570 - Implement preliminary support for the circuit padding portion of
3571 Proposal 254. The implementation supports Adaptive Padding (aka
3572 WTF-PAD) state machines for use between experimental clients and
3573 relays. Support is also provided for APE-style state machines that
3574 use probability distributions instead of histograms to specify
3575 inter-packet delay. At the moment, Tor does not provide any
3576 padding state machines that are used in normal operation: for now,
3577 this feature exists solely for experimentation. Closes
3580 o Major features (refactoring):
3581 - Tor now uses an explicit list of its own subsystems when
3582 initializing and shutting down. Previously, these systems were
3583 managed implicitly in various places throughout the codebase.
3584 (There may still be some subsystems using the old system.) Closes
3587 o Minor features (bootstrap reporting):
3588 - When reporting bootstrap progress, stop distinguishing between
3589 situations where only internal paths are available and situations
3590 where external paths are available. Previously, Tor would often
3591 erroneously report that it had only internal paths. Closes
3594 o Minor features (continuous integration):
3595 - Log Python version during each Travis CI job. Resolves
3598 o Minor features (controller):
3599 - Add a DROPOWNERSHIP command to undo the effects of TAKEOWNERSHIP.
3600 Implements ticket 28843.
3602 o Minor features (developer tooling):
3603 - Provide a git hook script to prevent "fixup!" and "squash!"
3604 commits from ending up in the master branch, as scripts/main/pre-
3605 push.git-hook. Closes ticket 27993.
3607 o Minor features (directory authority):
3608 - Directory authorities support a new consensus algorithm, under
3609 which the family lines in microdescriptors are encoded in a
3610 canonical form. This change makes family lines more compressible
3611 in transit, and on the client. Closes ticket 28266; implements
3614 o Minor features (directory authority, relay):
3615 - Authorities now vote on a "StaleDesc" flag to indicate that a
3616 relay's descriptor is so old that the relay should upload again
3617 soon. Relays treat this flag as a signal to upload a new
3618 descriptor. This flag will eventually let us remove the
3619 'published' date from routerstatus entries, and make our consensus
3620 diffs much smaller. Closes ticket 26770; implements proposal 293.
3622 o Minor features (fallback directory mirrors):
3623 - Update the fallback whitelist based on operator opt-ins and opt-
3624 outs. Closes ticket 24805, patch by Phoul.
3626 o Minor features (FreeBSD):
3627 - On FreeBSD-based systems, warn relay operators if the
3628 "net.inet.ip.random_id" sysctl (IP ID randomization) is disabled.
3629 Closes ticket 28518.
3631 o Minor features (HTTP standards compliance):
3632 - Stop sending the header "Content-type: application/octet-stream"
3633 along with transparently compressed documents: this confused
3634 browsers. Closes ticket 28100.
3636 o Minor features (IPv6):
3637 - We add an option ClientAutoIPv6ORPort, to make clients randomly
3638 prefer a node's IPv4 or IPv6 ORPort. The random preference is set
3639 every time a node is loaded from a new consensus or bridge config.
3640 We expect that this option will enable clients to bootstrap more
3641 quickly without having to determine whether they support IPv4,
3642 IPv6, or both. Closes ticket 27490. Patch by Neel Chauhan.
3643 - When using addrs_in_same_network_family(), avoid choosing circuit
3644 paths that pass through the same IPv6 subnet more than once.
3645 Previously, we only checked IPv4 subnets. Closes ticket 24393.
3646 Patch by Neel Chauhan.
3648 o Minor features (log messages):
3649 - Improve log message in v3 onion services that could print out
3650 negative revision counters. Closes ticket 27707. Patch
3653 o Minor features (memory usage):
3654 - Save memory by storing microdescriptor family lists with a more
3655 compact representation. Closes ticket 27359.
3656 - Tor clients now use mmap() to read consensus files from disk, so
3657 that they no longer need keep the full text of a consensus in
3658 memory when parsing it or applying a diff. Closes ticket 27244.
3660 o Minor features (parsing):
3661 - Directory authorities now validate that router descriptors and
3662 ExtraInfo documents are in a valid subset of UTF-8, and reject
3663 them if they are not. Closes ticket 27367.
3665 o Minor features (performance):
3666 - Cache the results of summarize_protocol_flags(), so that we don't
3667 have to parse the same protocol-versions string over and over.
3668 This should save us a huge number of malloc calls on startup, and
3669 may reduce memory fragmentation with some allocators. Closes
3671 - Remove a needless memset() call from get_token_arguments, thereby
3672 speeding up the tokenization of directory objects by about 20%.
3673 Closes ticket 28852.
3674 - Replace parse_short_policy() with a faster implementation, to
3675 improve microdescriptor parsing time. Closes ticket 28853.
3676 - Speed up directory parsing a little by avoiding use of the non-
3677 inlined strcmp_len() function. Closes ticket 28856.
3678 - Speed up microdescriptor parsing by about 30%, to help improve
3679 startup time. Closes ticket 28839.
3681 o Minor features (pluggable transports):
3682 - Add support for emitting STATUS updates to Tor's control port from
3683 a pluggable transport process. Closes ticket 28846.
3684 - Add support for logging to Tor's logging subsystem from a
3685 pluggable transport process. Closes ticket 28180.
3687 o Minor features (process management):
3688 - Add a new process API for handling child processes. This new API
3689 allows Tor to have bi-directional communication with child
3690 processes on both Unix and Windows. Closes ticket 28179.
3691 - Use the subsystem manager to initialize and shut down the process
3692 module. Closes ticket 28847.
3694 o Minor features (relay):
3695 - When listing relay families, list them in canonical form including
3696 the relay's own identity, and try to give a more useful set of
3697 warnings. Part of ticket 28266 and proposal 298.
3699 o Minor features (required protocols):
3700 - Before exiting because of a missing required protocol, Tor will
3701 now check the publication time of the consensus, and not exit
3702 unless the consensus is newer than the Tor program's own release
3703 date. Previously, Tor would not check the consensus publication
3704 time, and so might exit because of a missing protocol that might
3705 no longer be required in a current consensus. Implements proposal
3706 297; closes ticket 27735.
3708 o Minor features (testing):
3709 - Allow a HeartbeatPeriod of less than 30 minutes in testing Tor
3710 networks. Closes ticket 28840. Patch by Rob Jansen.
3712 o Minor bugfixes (client, clock skew):
3713 - Bootstrap successfully even when Tor's clock is behind the clocks
3714 on the authorities. Fixes bug 28591; bugfix on 0.2.0.9-alpha.
3715 - Select guards even if the consensus has expired, as long as the
3716 consensus is still reasonably live. Fixes bug 24661; bugfix
3719 o Minor bugfixes (compilation):
3720 - Compile correctly on OpenBSD; previously, we were missing some
3721 headers required in order to detect it properly. Fixes bug 28938;
3722 bugfix on 0.3.5.1-alpha. Patch from Kris Katterjohn.
3724 o Minor bugfixes (directory clients):
3725 - Mark outdated dirservers when Tor only has a reasonably live
3726 consensus. Fixes bug 28569; bugfix on 0.3.2.5-alpha.
3728 o Minor bugfixes (directory mirrors):
3729 - Even when a directory mirror's clock is behind the clocks on the
3730 authorities, we now allow the mirror to serve "future"
3731 consensuses. Fixes bug 28654; bugfix on 0.3.0.1-alpha.
3733 o Minor bugfixes (DNS):
3734 - Gracefully handle an empty or absent resolve.conf file by falling
3735 back to using "localhost" as a DNS server (and hoping it works).
3736 Previously, we would just stop running as an exit. Fixes bug
3737 21900; bugfix on 0.2.1.10-alpha.
3739 o Minor bugfixes (guards):
3740 - In count_acceptable_nodes(), the minimum number is now one bridge
3741 or guard node, and two non-guard nodes for a circuit. Previously,
3742 we had added up the sum of all nodes with a descriptor, but that
3743 could cause us to build failing circuits when we had either too
3744 many bridges or not enough guard nodes. Fixes bug 25885; bugfix on
3745 0.2.3.1-alpha. Patch by Neel Chauhan.
3747 o Minor bugfixes (IPv6):
3748 - Fix tor_ersatz_socketpair on IPv6-only systems. Previously, the
3749 IPv6 socket was bound using an address family of AF_INET instead
3750 of AF_INET6. Fixes bug 28995; bugfix on 0.3.5.1-alpha. Patch from
3753 o Minor bugfixes (logging):
3754 - Rework rep_hist_log_link_protocol_counts() to iterate through all
3755 link protocol versions when logging incoming/outgoing connection
3756 counts. Tor no longer skips version 5, and we won't have to
3757 remember to update this function when new link protocol version is
3758 developed. Fixes bug 28920; bugfix on 0.2.6.10.
3760 o Minor bugfixes (networking):
3761 - Introduce additional checks into tor_addr_parse() to reject
3762 certain incorrect inputs that previously were not detected. Fixes
3763 bug 23082; bugfix on 0.2.0.10-alpha.
3765 o Minor bugfixes (onion service v3, client):
3766 - Stop logging a "BUG()" warning and stacktrace when we find a SOCKS
3767 connection waiting for a descriptor that we actually have in the
3768 cache. It turns out that this can actually happen, though it is
3769 rare. Now, tor will recover and retry the descriptor. Fixes bug
3770 28669; bugfix on 0.3.2.4-alpha.
3772 o Minor bugfixes (periodic events):
3773 - Refrain from calling routerlist_remove_old_routers() from
3774 check_descriptor_callback(). Instead, create a new hourly periodic
3775 event. Fixes bug 27929; bugfix on 0.2.8.1-alpha.
3777 o Minor bugfixes (pluggable transports):
3778 - Make sure that data is continously read from standard output and
3779 standard error pipes of a pluggable transport child-process, to
3780 avoid deadlocking when a pipe's buffer is full. Fixes bug 26360;
3781 bugfix on 0.2.3.6-alpha.
3783 o Minor bugfixes (unit tests):
3784 - Instead of relying on hs_free_all() to clean up all onion service
3785 objects in test_build_descriptors(), we now deallocate them one by
3786 one. This lets Coverity know that we are not leaking memory there
3787 and fixes CID 1442277. Fixes bug 28989; bugfix on 0.3.5.1-alpha.
3789 o Minor bugfixes (usability):
3790 - Stop saying "Your Guard ..." in pathbias_measure_{use,close}_rate().
3791 Some users took this phrasing to mean that the mentioned guard was
3792 under their control or responsibility, which it is not. Fixes bug
3793 28895; bugfix on Tor 0.3.0.1-alpha.
3795 o Code simplification and refactoring:
3796 - Reimplement NETINFO cell parsing and generation to rely on
3797 trunnel-generated wire format handling code. Closes ticket 27325.
3798 - Remove unnecessary unsafe code from the Rust macro "cstr!". Closes
3800 - Rework SOCKS wire format handling to rely on trunnel-generated
3801 parsing/generation code. Resolves ticket 27620.
3802 - Split out bootstrap progress reporting from control.c into a
3803 separate file. Part of ticket 27402.
3804 - The .may_include files that we use to describe our directory-by-
3805 directory dependency structure now describe a noncircular
3806 dependency graph over the directories that they cover. Our
3807 checkIncludes.py tool now enforces this noncircularity. Closes
3811 - Mention that you cannot add a new onion service if Tor is already
3812 running with Sandbox enabled. Closes ticket 28560.
3813 - Improve ControlPort documentation. Mention that it accepts
3814 address:port pairs, and can be used multiple times. Closes
3816 - Document the exact output of "tor --version". Closes ticket 28889.
3819 - Stop responding to the 'GETINFO status/version/num-concurring' and
3820 'GETINFO status/version/num-versioning' control port commands, as
3821 those were deprecated back in 0.2.0.30. Also stop listing them in
3822 output of 'GETINFO info/names'. Resolves ticket 28757.
3823 - The scripts used to generate and maintain the list of fallback
3824 directories have been extracted into a new "fallback-scripts"
3825 repository. Closes ticket 27914.
3828 - Run shellcheck for scripts in the in scripts/ directory. Closes
3830 - Add unit tests for tokenize_string() and get_next_token()
3831 functions. Resolves ticket 27625.
3833 o Code simplification and refactoring (onion service v3):
3834 - Consolidate the authorized client descriptor cookie computation
3835 code from client and service into one function. Closes
3838 o Code simplification and refactoring (shell scripts):
3839 - Cleanup scan-build.sh to silence shellcheck warnings. Closes
3841 - Fix issues that shellcheck found in chutney-git-bisect.sh.
3842 Resolves ticket 28006.
3843 - Fix issues that shellcheck found in updateRustDependencies.sh.
3844 Resolves ticket 28012.
3845 - Fix shellcheck warnings in cov-diff script. Resolves issue 28009.
3846 - Fix shellcheck warnings in run_calltool.sh. Resolves ticket 28011.
3847 - Fix shellcheck warnings in run_trunnel.sh. Resolves issue 28010.
3848 - Fix shellcheck warnings in scripts/test/coverage. Resolves
3852 Changes in version 0.3.3.11 - 2019-01-07
3853 Tor 0.3.3.11 backports numerous fixes from later versions of Tor.
3854 numerous fixes, including an important fix for anyone using OpenSSL
3855 1.1.1. Anyone running an earlier version of Tor 0.3.3 should upgrade
3856 to this version, or to a later series.
3858 As a reminder, support the Tor 0.3.3 series will end on 22 Feb 2019.
3859 We anticipate that this will be the last release of Tor 0.3.3, unless
3860 some major bug is before then. Some time between now and then, users
3861 should switch to either the Tor 0.3.4 series (supported until at least
3862 10 June 2019), or the Tor 0.3.5 series, which will receive long-term
3863 support until at least 1 Feb 2022.
3865 o Major bugfixes (OpenSSL, portability, backport from 0.3.5.5-alpha):
3866 - Fix our usage of named groups when running as a TLS 1.3 client in
3867 OpenSSL 1.1.1. Previously, we only initialized EC groups when
3868 running as a relay, which caused clients to fail to negotiate TLS
3869 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
3872 o Major bugfixes (restart-in-process, backport from 0.3.5.1-alpha):
3873 - Fix a use-after-free error that could be caused by passing Tor an
3874 impossible set of options that would fail during options_act().
3875 Fixes bug 27708; bugfix on 0.3.3.1-alpha.
3877 o Minor features (continuous integration, backport from 0.3.5.1-alpha):
3878 - Only run one online rust build in Travis, to reduce network
3879 errors. Skip offline rust builds on Travis for Linux gcc, because
3880 they're redundant. Implements ticket 27252.
3881 - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
3882 duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
3883 Linux with default settings, because all the non-default builds
3884 use gcc on Linux. Implements ticket 27252.
3886 o Minor features (continuous integration, backport from 0.3.5.3-alpha):
3887 - Use the Travis Homebrew addon to install packages on macOS during
3888 Travis CI. The package list is the same, but the Homebrew addon
3889 does not do a `brew update` by default. Implements ticket 27738.
3891 o Minor features (fallback directory list, backport from 0.3.5.6-rc):
3892 - Replace the 150 fallbacks originally introduced in Tor
3893 0.3.3.1-alpha in January 2018 (of which ~115 were still
3894 functional), with a list of 157 fallbacks (92 new, 65 existing, 85
3895 removed) generated in December 2018. Closes ticket 24803.
3897 o Minor features (geoip):
3898 - Update geoip and geoip6 to the January 3 2019 Maxmind GeoLite2
3899 Country database. Closes ticket 29012.
3901 o Minor features (OpenSSL bug workaround, backport from 0.3.5.7):
3902 - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
3903 key export function from handling long labels. When this bug is
3904 detected, Tor will disable TLS 1.3. We recommend upgrading to a
3905 version of OpenSSL without this bug when it becomes available.
3906 Closes ticket 28973.
3908 o Minor bugfixes (relay statistics, backport from 0.3.5.7):
3909 - Update relay descriptor on bandwidth changes only when the uptime
3910 is smaller than 24h, in order to reduce the efficiency of guard
3911 discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
3913 o Minor bugfixes (C correctness, backport from 0.3.5.4-alpha):
3914 - Avoid undefined behavior in an end-of-string check when parsing
3915 the BEGIN line in a directory object. Fixes bug 28202; bugfix
3918 o Minor bugfixes (code safety, backport from 0.3.5.3-alpha):
3919 - Rewrite our assertion macros so that they no longer suppress the
3920 compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
3922 o Minor bugfixes (compilation, backport from 0.3.5.5-alpha):
3923 - Initialize a variable unconditionally in aes_new_cipher(), since
3924 some compilers cannot tell that we always initialize it before
3925 use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
3927 o Minor bugfixes (directory authority, backport from 0.3.5.4-alpha):
3928 - Log additional info when we get a relay that shares an ed25519 ID
3929 with a different relay, instead making a BUG() warning. Fixes bug
3930 27800; bugfix on 0.3.2.1-alpha.
3932 o Minor bugfixes (directory permissions, backport form 0.3.5.3-alpha):
3933 - When a user requests a group-readable DataDirectory, give it to
3934 them. Previously, when the DataDirectory and the CacheDirectory
3935 were the same, the default setting (0) for
3936 CacheDirectoryGroupReadable would override the setting for
3937 DataDirectoryGroupReadable. Fixes bug 26913; bugfix
3940 o Minor bugfixes (onion service v3, backport from 0.3.5.1-alpha):
3941 - When the onion service directory can't be created or has the wrong
3942 permissions, do not log a stack trace. Fixes bug 27335; bugfix
3945 o Minor bugfixes (onion service v3, backport from 0.3.5.2-alpha):
3946 - Close all SOCKS request (for the same .onion) if the newly fetched
3947 descriptor is unusable. Before that, we would close only the first
3948 one leaving the other hanging and let to time out by themselves.
3949 Fixes bug 27410; bugfix on 0.3.2.1-alpha.
3951 o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
3952 - Don't warn so loudly when Tor is unable to decode an onion
3953 descriptor. This can now happen as a normal use case if a client
3954 gets a descriptor with client authorization but the client is not
3955 authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
3957 o Minor bugfixes (onion service v3, backport from 0.3.5.6-rc):
3958 - When deleting an ephemeral onion service (DEL_ONION), do not close
3959 any rendezvous circuits in order to let the existing client
3960 connections finish by themselves or closed by the application. The
3961 HS v2 is doing that already so now we have the same behavior for
3962 all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
3964 o Minor bugfixes (HTTP tunnel):
3965 - Fix a bug warning when closing an HTTP tunnel connection due to
3966 an HTTP request we couldn't handle. Fixes bug 26470; bugfix on
3969 o Minor bugfixes (memory leaks, backport from 0.3.5.5-alpha):
3970 - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
3971 bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
3973 o Minor bugfixes (netflow padding, backport from 0.3.5.1-alpha):
3974 - Ensure circuitmux queues are empty before scheduling or sending
3975 padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
3977 o Minor bugfixes (protover, backport from 0.3.5.3-alpha):
3978 - Reject protocol names containing bytes other than alphanumeric
3979 characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
3982 o Minor bugfixes (rust, backport from 0.3.5.1-alpha):
3983 - Compute protover votes correctly in the rust version of the
3984 protover code. Previously, the protover rewrite in 24031 allowed
3985 repeated votes from the same voter for the same protocol version
3986 to be counted multiple times in protover_compute_vote(). Fixes bug
3987 27649; bugfix on 0.3.3.5-rc.
3988 - Reject protover names that contain invalid characters. Fixes bug
3989 27687; bugfix on 0.3.3.1-alpha.
3991 o Minor bugfixes (rust, backport from 0.3.5.2-alpha):
3992 - protover_all_supported() would attempt to allocate up to 16GB on
3993 some inputs, leading to a potential memory DoS. Fixes bug 27206;
3994 bugfix on 0.3.3.5-rc.
3996 o Minor bugfixes (rust, backport from 0.3.5.4-alpha):
3997 - Fix a potential null dereference in protover_all_supported(). Add
3998 a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
3999 - Return a string that can be safely freed by C code, not one
4000 created by the rust allocator, in protover_all_supported(). Fixes
4001 bug 27740; bugfix on 0.3.3.1-alpha.
4002 - Fix an API mismatch in the rust implementation of
4003 protover_compute_vote(). This bug could have caused crashes on any
4004 directory authorities running Tor with Rust (which we do not yet
4005 recommend). Fixes bug 27741; bugfix on 0.3.3.6.
4007 o Minor bugfixes (testing, backport from 0.3.5.1-alpha):
4008 - If a unit test running in a subprocess exits abnormally or with a
4009 nonzero status code, treat the test as having failed, even if the
4010 test reported success. Without this fix, memory leaks don't cause
4011 the tests to fail, even with LeakSanitizer. Fixes bug 27658;
4012 bugfix on 0.2.2.4-alpha.
4014 o Minor bugfixes (testing, backport from 0.3.5.4-alpha):
4015 - Treat backtrace test failures as expected on BSD-derived systems
4016 (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
4017 (FreeBSD failures have been treated as expected since 18204 in
4018 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
4020 o Minor bugfixes (unit tests, guard selection, backport from 0.3.5.6-rc):
4021 - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
4022 bugfix on 0.3.0.1-alpha.
4025 Changes in version 0.3.4.10 - 2019-01-07
4026 Tor 0.3.4.9 is the second stable release in its series; it backports
4027 numerous fixes, including an important fix for relays, and for anyone
4028 using OpenSSL 1.1.1. Anyone running an earlier version of Tor 0.3.4
4031 As a reminder, the Tor 0.3.4 series will be supported until 10 June
4032 2019. Some time between now and then, users should switch to the Tor
4033 0.3.5 series, which will receive long-term support until at least 1
4036 o Major bugfixes (OpenSSL, portability, backport from 0.3.5.5-alpha):
4037 - Fix our usage of named groups when running as a TLS 1.3 client in
4038 OpenSSL 1.1.1. Previously, we only initialized EC groups when
4039 running as a relay, which caused clients to fail to negotiate TLS
4040 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
4043 o Major bugfixes (relay, directory, backport from 0.3.5.7):
4044 - Always reactivate linked connections in the main loop so long as
4045 any linked connection has been active. Previously, connections
4046 serving directory information wouldn't get reactivated after the
4047 first chunk of data was sent (usually 32KB), which would prevent
4048 clients from bootstrapping. Fixes bug 28912; bugfix on
4049 0.3.4.1-alpha. Patch by "cypherpunks3".
4051 o Minor features (continuous integration, Windows, backport from 0.3.5.6-rc):
4052 - Always show the configure and test logs, and upload them as build
4053 artifacts, when building for Windows using Appveyor CI.
4056 o Minor features (controller, backport from 0.3.5.1-alpha):
4057 - For purposes of CIRC_BW-based dropped cell detection, track half-
4058 closed stream ids, and allow their ENDs, SENDMEs, DATA and path
4059 bias check cells to arrive without counting it as dropped until
4060 either the END arrives, or the windows are empty. Closes
4063 o Minor features (fallback directory list, backport from 0.3.5.6-rc):
4064 - Replace the 150 fallbacks originally introduced in Tor
4065 0.3.3.1-alpha in January 2018 (of which ~115 were still
4066 functional), with a list of 157 fallbacks (92 new, 65 existing, 85
4067 removed) generated in December 2018. Closes ticket 24803.
4069 o Minor features (geoip):
4070 - Update geoip and geoip6 to the November 6 2018 Maxmind GeoLite2
4071 Country database. Closes ticket 28395.
4073 o Minor features (OpenSSL bug workaround, backport from 0.3.5.7):
4074 - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
4075 key export function from handling long labels. When this bug is
4076 detected, Tor will disable TLS 1.3. We recommend upgrading to a
4077 version of OpenSSL without this bug when it becomes available.
4078 Closes ticket 28973.
4080 o Minor bugfixes (compilation, backport from 0.3.5.5-alpha):
4081 - Initialize a variable unconditionally in aes_new_cipher(), since
4082 some compilers cannot tell that we always initialize it before
4083 use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
4085 o Minor bugfixes (connection, relay, backport from 0.3.5.5-alpha):
4086 - Avoid a logging a BUG() stacktrace when closing connection held
4087 open because the write side is rate limited but not the read side.
4088 Now, the connection read side is simply shut down until Tor is
4089 able to flush the connection and close it. Fixes bug 27750; bugfix
4092 o Minor bugfixes (continuous integration, Windows, backport from 0.3.5.5-alpha):
4093 - Manually configure the zstd compiler options, when building using
4094 mingw on Appveyor Windows CI. The MSYS2 mingw zstd package does
4095 not come with a pkg-config file. Fixes bug 28454; bugfix
4097 - Stop using an external OpenSSL install, and stop installing MSYS2
4098 packages, when building using mingw on Appveyor Windows CI. Fixes
4099 bug 28399; bugfix on 0.3.4.1-alpha.
4101 o Minor bugfixes (continuous integration, Windows, backport from 0.3.5.6-rc):
4102 - Explicitly specify the path to the OpenSSL library and do not
4103 download OpenSSL from Pacman, but instead use the library that is
4104 already provided by AppVeyor. Fixes bug 28574; bugfix on master.
4106 o Minor bugfixes (directory permissions, backport form 0.3.5.3-alpha):
4107 - When a user requests a group-readable DataDirectory, give it to
4108 them. Previously, when the DataDirectory and the CacheDirectory
4109 were the same, the default setting (0) for
4110 CacheDirectoryGroupReadable would override the setting for
4111 DataDirectoryGroupReadable. Fixes bug 26913; bugfix
4114 o Minor bugfixes (memory leaks, backport from 0.3.5.5-alpha):
4115 - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
4116 bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
4118 o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
4119 - Don't warn so loudly when Tor is unable to decode an onion
4120 descriptor. This can now happen as a normal use case if a client
4121 gets a descriptor with client authorization but the client is not
4122 authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
4124 o Minor bugfixes (onion service v3, backport from 0.3.5.6-rc):
4125 - When deleting an ephemeral onion service (DEL_ONION), do not close
4126 any rendezvous circuits in order to let the existing client
4127 connections finish by themselves or closed by the application. The
4128 HS v2 is doing that already so now we have the same behavior for
4129 all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
4131 o Minor bugfixes (relay statistics, backport from 0.3.5.7):
4132 - Update relay descriptor on bandwidth changes only when the uptime
4133 is smaller than 24h, in order to reduce the efficiency of guard
4134 discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
4136 o Minor bugfixes (unit tests, guard selection, backport from 0.3.5.6-rc):
4137 - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
4138 bugfix on 0.3.0.1-alpha.
4141 Changes in version 0.3.5.7 - 2019-01-07
4142 Tor 0.3.5.7 is the first stable release in its series; it includes
4143 compilation and portability fixes, and a fix for a severe problem
4144 affecting directory caches.
4146 The Tor 0.3.5 series includes several new features and performance
4147 improvements, including client authorization for v3 onion services,
4148 cleanups to bootstrap reporting, support for improved bandwidth-
4149 measurement tools, experimental support for NSS in place of OpenSSL,
4150 and much more. It also begins a full reorganization of Tor's code
4151 layout, for improved modularity and maintainability in the future.
4152 Finally, there is the usual set of performance improvements and
4153 bugfixes that we try to do in every release series.
4155 There are a couple of changes in the 0.3.5 that may affect
4156 compatibility. First, the default version for newly created onion
4157 services is now v3. Use the HiddenServiceVersion option if you want to
4158 override this. Second, some log messages related to bootstrapping have
4159 changed; if you use stem, you may need to update to the latest version
4160 so it will recognize them.
4162 We have designated 0.3.5 as a "long-term support" (LTS) series: we
4163 will continue to patch major bugs in typical configurations of 0.3.5
4164 until at least 1 Feb 2022. (We do not plan to provide long-term
4165 support for embedding, Rust support, NSS support, running a directory
4166 authority, or unsupported platforms. For these, you will need to stick
4167 with the latest stable release.)
4169 Below are the changes since 0.3.5.6-rc. For a complete list of changes
4170 since 0.3.4.9, see the ReleaseNotes file.
4172 o Major bugfixes (relay, directory):
4173 - Always reactivate linked connections in the main loop so long as
4174 any linked connection has been active. Previously, connections
4175 serving directory information wouldn't get reactivated after the
4176 first chunk of data was sent (usually 32KB), which would prevent
4177 clients from bootstrapping. Fixes bug 28912; bugfix on
4178 0.3.4.1-alpha. Patch by "cypherpunks3".
4180 o Minor features (compilation):
4181 - When possible, place our warning flags in a separate file, to
4182 avoid flooding verbose build logs. Closes ticket 28924.
4184 o Minor features (geoip):
4185 - Update geoip and geoip6 to the January 3 2019 Maxmind GeoLite2
4186 Country database. Closes ticket 29012.
4188 o Minor features (OpenSSL bug workaround):
4189 - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
4190 key export function from handling long labels. When this bug is
4191 detected, Tor will disable TLS 1.3. We recommend upgrading to a
4192 version of OpenSSL without this bug when it becomes available.
4193 Closes ticket 28973.
4195 o Minor features (performance):
4196 - Remove about 96% of the work from the function that we run at
4197 startup to test our curve25519_basepoint implementation. Since
4198 this function has yet to find an actual failure, we now only run
4199 it for 8 iterations instead of 200. Based on our profile
4200 information, this change should save around 8% of our startup time
4201 on typical desktops, and may have a similar effect on other
4202 platforms. Closes ticket 28838.
4203 - Stop re-validating our hardcoded Diffie-Hellman parameters on
4204 every startup. Doing this wasted time and cycles, especially on
4205 low-powered devices. Closes ticket 28851.
4207 o Minor bugfixes (compilation):
4208 - Fix compilation for Android by adding a missing header to
4209 freespace.c. Fixes bug 28974; bugfix on 0.3.5.1-alpha.
4211 o Minor bugfixes (correctness):
4212 - Fix an unreached code path where we checked the value of
4213 "hostname" inside send_resolved_hostname_cell(). Previously, we
4214 used it before checking it; now we check it first. Fixes bug
4215 28879; bugfix on 0.1.2.7-alpha.
4217 o Minor bugfixes (testing):
4218 - Make sure that test_rebind.py actually obeys its timeout, even
4219 when it receives a large number of log messages. Fixes bug 28883;
4220 bugfix on 0.3.5.4-alpha.
4221 - Stop running stem's unit tests as part of "make test-stem", but
4222 continue to run stem's unit and online tests during "make test-
4223 stem-full". Fixes bug 28568; bugfix on 0.2.6.3-alpha.
4225 o Minor bugfixes (windows services):
4226 - Make Tor start correctly as an NT service again: previously it was
4227 broken by refactoring. Fixes bug 28612; bugfix on 0.3.5.3-alpha.
4229 o Code simplification and refactoring:
4230 - When parsing a port configuration, make it more obvious to static
4231 analyzer tools that we always initialize the address. Closes
4235 Changes in version 0.3.5.6-rc - 2018-12-18
4236 Tor 0.3.5.6-rc fixes numerous small bugs in earlier versions of Tor.
4237 It is the first release candidate in the 0.3.5.x series; if no further
4238 huge bugs are found, our next release may be the stable 0.3.5.x.
4240 o Minor features (continuous integration, Windows):
4241 - Always show the configure and test logs, and upload them as build
4242 artifacts, when building for Windows using Appveyor CI.
4245 o Minor features (fallback directory list):
4246 - Replace the 150 fallbacks originally introduced in Tor
4247 0.3.3.1-alpha in January 2018 (of which ~115 were still
4248 functional), with a list of 157 fallbacks (92 new, 65 existing, 85
4249 removed) generated in December 2018. Closes ticket 24803.
4251 o Minor features (geoip):
4252 - Update geoip and geoip6 to the December 5 2018 Maxmind GeoLite2
4253 Country database. Closes ticket 28744.
4255 o Minor bugfixes (compilation):
4256 - Add missing dependency on libgdi32.dll for tor-print-ed-signing-
4257 cert.exe on Windows. Fixes bug 28485; bugfix on 0.3.5.1-alpha.
4259 o Minor bugfixes (continuous integration, Windows):
4260 - Explicitly specify the path to the OpenSSL library and do not
4261 download OpenSSL from Pacman, but instead use the library that is
4262 already provided by AppVeyor. Fixes bug 28574; bugfix on master.
4264 o Minor bugfixes (onion service v3):
4265 - When deleting an ephemeral onion service (DEL_ONION), do not close
4266 any rendezvous circuits in order to let the existing client
4267 connections finish by themselves or closed by the application. The
4268 HS v2 is doing that already so now we have the same behavior for
4269 all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
4271 o Minor bugfixes (restart-in-process, boostrap):
4272 - Add missing resets of bootstrap tracking state when shutting down
4273 (regression caused by ticket 27169). Fixes bug 28524; bugfix
4276 o Minor bugfixes (testing):
4277 - Use a separate DataDirectory for the test_rebind script.
4278 Previously, this script would run using the default DataDirectory,
4279 and sometimes fail. Fixes bug 28562; bugfix on 0.3.5.1-alpha.
4280 Patch from Taylor R Campbell.
4281 - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
4282 bugfix on 0.3.0.1-alpha.
4284 o Minor bugfixes (Windows):
4285 - Correctly identify Windows 8.1, Windows 10, and Windows Server
4286 2008 and later from their NT versions. Fixes bug 28096; bugfix on
4287 0.2.2.34; reported by Keifer Bly.
4288 - On recent Windows versions, the GetVersionEx() function may report
4289 an earlier Windows version than the running OS. To avoid user
4290 confusion, add "[or later]" to Tor's version string on affected
4291 versions of Windows. Fixes bug 28096; bugfix on 0.2.2.34; reported
4293 - Remove Windows versions that were never supported by the
4294 GetVersionEx() function. Stop duplicating the latest Windows
4295 version in get_uname(). Fixes bug 28096; bugfix on 0.2.2.34;
4296 reported by Keifer Bly.
4299 - Increase logging and tag all log entries with timestamps in
4300 test_rebind.py. Provides diagnostics for issue 28229.
4302 o Code simplification and refactoring (shared random, dirauth):
4303 - Change many tor_assert() to use BUG() instead. The idea is to not
4304 crash a dirauth but rather scream loudly with a stacktrace and let
4305 it continue run. The shared random subsystem is very resilient and
4306 if anything wrong happens with it, at worst a non coherent value
4307 will be put in the vote and discarded by the other authorities.
4308 Closes ticket 19566.
4310 o Documentation (onion services):
4311 - Document in the man page that changing ClientOnionAuthDir value or
4312 adding a new file in the directory will not work at runtime upon
4313 sending a HUP if Sandbox 1. Closes ticket 28128.
4314 - Note in the man page that the only real way to fully revoke an
4315 onion service v3 client authorization is by restarting the tor
4316 process. Closes ticket 28275.
4319 Changes in version 0.3.5.5-alpha - 2018-11-16
4320 Tor 0.3.5.5-alpha includes numerous bugfixes on earlier releases,
4321 including several that we hope to backport to older release series in
4324 o Major bugfixes (OpenSSL, portability):
4325 - Fix our usage of named groups when running as a TLS 1.3 client in
4326 OpenSSL 1.1.1. Previously, we only initialized EC groups when
4327 running as a relay, which caused clients to fail to negotiate TLS
4328 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
4331 o Minor features (geoip):
4332 - Update geoip and geoip6 to the November 6 2018 Maxmind GeoLite2
4333 Country database. Closes ticket 28395.
4335 o Minor bugfixes (compilation):
4336 - Initialize a variable unconditionally in aes_new_cipher(), since
4337 some compilers cannot tell that we always initialize it before
4338 use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
4340 o Minor bugfixes (connection, relay):
4341 - Avoid a logging a BUG() stacktrace when closing connection held
4342 open because the write side is rate limited but not the read side.
4343 Now, the connection read side is simply shut down until Tor is
4344 able to flush the connection and close it. Fixes bug 27750; bugfix
4347 o Minor bugfixes (continuous integration, Windows):
4348 - Manually configure the zstd compiler options, when building using
4349 mingw on Appveyor Windows CI. The MSYS2 mingw zstd package does
4350 not come with a pkg-config file. Fixes bug 28454; bugfix
4352 - Stop using an external OpenSSL install, and stop installing MSYS2
4353 packages, when building using mingw on Appveyor Windows CI. Fixes
4354 bug 28399; bugfix on 0.3.4.1-alpha.
4356 o Minor bugfixes (documentation):
4357 - Make Doxygen work again after the code movement in the 0.3.5
4358 source tree. Fixes bug 28435; bugfix on 0.3.5.1-alpha.
4360 o Minor bugfixes (Linux seccomp2 sandbox):
4361 - Permit the "shutdown()" system call, which is apparently used by
4362 OpenSSL under some circumstances. Fixes bug 28183; bugfix
4365 o Minor bugfixes (logging):
4366 - Stop talking about the Named flag in log messages. Clients have
4367 ignored the Named flag since 0.3.2. Fixes bug 28441; bugfix
4370 o Minor bugfixes (memory leaks):
4371 - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
4372 bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
4374 o Minor bugfixes (onion services):
4375 - On an intro point for a version 3 onion service, stop closing
4376 introduction circuits on an NACK. This lets the client decide
4377 whether to reuse the circuit or discard it. Previously, we closed
4378 intro circuits when sending NACKs. Fixes bug 27841; bugfix on
4379 0.3.2.1-alpha. Patch by Neel Chaunan.
4380 - When replacing a descriptor in the client cache, make sure to
4381 close all client introduction circuits for the old descriptor, so
4382 we don't end up with unusable leftover circuits. Fixes bug 27471;
4383 bugfix on 0.3.2.1-alpha.
4386 Changes in version 0.3.5.4-alpha - 2018-11-08
4387 Tor 0.3.5.4-alpha includes numerous bugfixes on earlier versions and
4388 improves our continuous integration support. It continues our attempts
4389 to stabilize this alpha branch and build it into a foundation for an
4390 acceptable long-term-support release.
4392 o Major bugfixes (compilation, rust):
4393 - Rust tests can now build and run successfully with the
4394 --enable-fragile-hardening option enabled. Doing this currently
4395 requires the rust beta channel; it will be possible with stable
4396 rust once Rust version 1.31 is released. Patch from Alex Crichton.
4397 Fixes bugs 27272, 27273, and 27274. Bugfix on 0.3.1.1-alpha.
4399 o Major bugfixes (embedding, main loop):
4400 - When DisableNetwork becomes set, actually disable periodic events
4401 that are already enabled. (Previously, we would refrain from
4402 enabling new ones, but we would leave the old ones turned on.)
4403 Fixes bug 28348; bugfix on 0.3.4.1-alpha.
4405 o Minor features (continuous integration):
4406 - Add a Travis CI build for --enable-nss on Linux gcc. Closes
4408 - Add new CI job to Travis configuration to run stem-based
4409 integration tests. Closes ticket 27913.
4411 o Minor features (Windows, continuous integration):
4412 - Build tor on Windows Server 2012 R2 and Windows Server 2016 using
4413 Appveyor's CI. Closes ticket 28318.
4415 o Minor bugfixes (C correctness, also in 0.3.4.9):
4416 - Avoid undefined behavior in an end-of-string check when parsing
4417 the BEGIN line in a directory object. Fixes bug 28202; bugfix
4420 o Minor bugfixes (compilation):
4421 - Fix a pair of missing headers on OpenBSD. Fixes bug 28303; bugfix
4422 on 0.3.5.1-alpha. Patch from Kris Katterjohn.
4424 o Minor bugfixes (compilation, OpenSolaris):
4425 - Fix compilation on OpenSolaris and its descendants by adding a
4426 missing include to compat_pthreads.c. Fixes bug 27963; bugfix
4429 o Minor bugfixes (configuration):
4430 - Refuse to start with relative file paths and RunAsDaemon set
4431 (regression from the fix for bug 22731). Fixes bug 28298; bugfix
4434 o Minor bugfixes (directory authority, also in 0.3.4.9):
4435 - Log additional info when we get a relay that shares an ed25519 ID
4436 with a different relay, instead of a BUG() warning with a
4437 backtrace. Fixes bug 27800; bugfix on 0.3.2.1-alpha.
4439 o Minor bugfixes (onion service v3):
4440 - Build the service descriptor's signing key certificate before
4441 uploading, so we always have a fresh one: leaving no chances for
4442 it to expire service side. Fixes bug 27838; bugfix
4445 o Minor bugfixes (onion service v3, client authorization):
4446 - Fix an assert() when adding a client authorization for the first
4447 time and then sending a HUP signal to the service. Before that,
4448 Tor would stop abruptly. Fixes bug 27995; bugfix on 0.3.5.1-alpha.
4450 o Minor bugfixes (onion services):
4451 - Unless we have explicitly set HiddenServiceVersion, detect the
4452 onion service version and then look for invalid options.
4453 Previously, we did the reverse, but that broke existing configs
4454 which were pointed to a v2 service and had options like
4455 HiddenServiceAuthorizeClient set. Fixes bug 28127; bugfix on
4456 0.3.5.1-alpha. Patch by Neel Chauhan.
4458 o Minor bugfixes (portability):
4459 - Make the OPE code (which is used for v3 onion services) run
4460 correctly on big-endian platforms. Fixes bug 28115; bugfix
4463 o Minor bugfixes (protover, rust):
4464 - Reject extra commas in version strings. Fixes bug 27197; bugfix
4467 o Minor bugfixes (relay shutdown, systemd):
4468 - Notify systemd of ShutdownWaitLength so it can be set to longer
4469 than systemd's TimeoutStopSec. In Tor's systemd service file, set
4470 TimeoutSec to 60 seconds to allow Tor some time to shut down.
4471 Fixes bug 28113; bugfix on 0.2.6.2-alpha.
4473 o Minor bugfixes (rust, also in 0.3.4.9):
4474 - Fix a potential null dereference in protover_all_supported(). Add
4475 a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
4476 - Return a string that can be safely freed by C code, not one
4477 created by the rust allocator, in protover_all_supported(). Fixes
4478 bug 27740; bugfix on 0.3.3.1-alpha.
4480 o Minor bugfixes (rust, directory authority, also in 0.3.4.9):
4481 - Fix an API mismatch in the rust implementation of
4482 protover_compute_vote(). This bug could have caused crashes on any
4483 directory authorities running Tor with Rust (which we do not yet
4484 recommend). Fixes bug 27741; bugfix on 0.3.3.6.
4486 o Minor bugfixes (testing):
4487 - Avoid hangs and race conditions in test_rebind.py. Fixes bug
4488 27968; bugfix on 0.3.5.1-alpha.
4490 o Minor bugfixes (testing, also in 0.3.4.9):
4491 - Treat backtrace test failures as expected on BSD-derived systems
4492 (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
4493 (FreeBSD failures have been treated as expected since 18204 in
4494 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
4496 o Documentation (onion service manpage):
4497 - Improve HSv3 client authorization by making some options more
4498 explicit and detailed. Closes ticket 28026. Patch by Mike Tigas.
4501 Changes in version 0.3.4.9 - 2018-11-02
4502 Tor 0.3.4.9 is the second stable release in its series; it backports
4503 numerous fixes, including a fix for a bandwidth management bug that
4504 was causing memory exhaustion on relays. Anyone running an earlier
4505 version of Tor 0.3.4.9 should upgrade.
4507 o Major bugfixes (compilation, backport from 0.3.5.3-alpha):
4508 - Fix compilation on ARM (and other less-used CPUs) when compiling
4509 with OpenSSL before 1.1. Fixes bug 27781; bugfix on 0.3.4.1-alpha.
4511 o Major bugfixes (mainloop, bootstrap, backport from 0.3.5.3-alpha):
4512 - Make sure Tor bootstraps and works properly if only the
4513 ControlPort is set. Prior to this fix, Tor would only bootstrap
4514 when a client port was set (Socks, Trans, NATD, DNS or HTTPTunnel
4515 port). Fixes bug 27849; bugfix on 0.3.4.1-alpha.
4517 o Major bugfixes (relay, backport from 0.3.5.3-alpha):
4518 - When our write bandwidth limit is exhausted, stop writing on the
4519 connection. Previously, we had a typo in the code that would make
4520 us stop reading instead, leading to relay connections being stuck
4521 indefinitely and consuming kernel RAM. Fixes bug 28089; bugfix
4524 o Major bugfixes (restart-in-process, backport from 0.3.5.1-alpha):
4525 - Fix a use-after-free error that could be caused by passing Tor an
4526 impossible set of options that would fail during options_act().
4527 Fixes bug 27708; bugfix on 0.3.3.1-alpha.
4529 o Minor features (continuous integration, backport from 0.3.5.1-alpha):
4530 - Don't do a distcheck with --disable-module-dirauth in Travis.
4531 Implements ticket 27252.
4532 - Only run one online rust build in Travis, to reduce network
4533 errors. Skip offline rust builds on Travis for Linux gcc, because
4534 they're redundant. Implements ticket 27252.
4535 - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
4536 duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
4537 Linux with default settings, because all the non-default builds
4538 use gcc on Linux. Implements ticket 27252.
4540 o Minor features (continuous integration, backport from 0.3.5.3-alpha):
4541 - Use the Travis Homebrew addon to install packages on macOS during
4542 Travis CI. The package list is the same, but the Homebrew addon
4543 does not do a `brew update` by default. Implements ticket 27738.
4545 o Minor features (geoip):
4546 - Update geoip and geoip6 to the October 9 2018 Maxmind GeoLite2
4547 Country database. Closes ticket 27991.
4549 o Minor bugfixes (32-bit OSX and iOS, timing, backport from 0.3.5.2-alpha):
4550 - Fix an integer overflow bug in our optimized 32-bit millisecond-
4551 difference algorithm for 32-bit Apple platforms. Previously, it
4552 would overflow when calculating the difference between two times
4553 more than 47 days apart. Fixes part of bug 27139; bugfix
4555 - Improve the precision of our 32-bit millisecond difference
4556 algorithm for 32-bit Apple platforms. Fixes part of bug 27139;
4557 bugfix on 0.3.4.1-alpha.
4558 - Relax the tolerance on the mainloop/update_time_jumps test when
4559 running on 32-bit Apple platforms. Fixes part of bug 27139; bugfix
4562 o Minor bugfixes (C correctness, to appear in 0.3.5.4-alpha):
4563 - Avoid undefined behavior in an end-of-string check when parsing
4564 the BEGIN line in a directory object. Fixes bug 28202; bugfix
4567 o Minor bugfixes (CI, appveyor, to appear in 0.3.5.4-alpha):
4568 - Only install the necessary mingw packages during our appveyor
4569 builds. This change makes the build a little faster, and prevents
4570 a conflict with a preinstalled mingw openssl that appveyor now
4571 ships. Fixes bugs 27943 and 27765; bugfix on 0.3.4.2-alpha.
4573 o Minor bugfixes (code safety, backport from 0.3.5.3-alpha):
4574 - Rewrite our assertion macros so that they no longer suppress the
4575 compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
4577 o Minor bugfixes (continuous integration, backport from 0.3.5.1-alpha):
4578 - Stop reinstalling identical packages in our Windows CI. Fixes bug
4579 27464; bugfix on 0.3.4.1-alpha.
4581 o Minor bugfixes (directory authority, to appear in 0.3.5.4-alpha):
4582 - Log additional info when we get a relay that shares an ed25519 ID
4583 with a different relay, instead making a BUG() warning. Fixes bug
4584 27800; bugfix on 0.3.2.1-alpha.
4586 o Minor bugfixes (directory connection shutdown, backport from 0.3.5.1-alpha):
4587 - Avoid a double-close when shutting down a stalled directory
4588 connection. Fixes bug 26896; bugfix on 0.3.4.1-alpha.
4590 o Minor bugfixes (HTTP tunnel, backport from 0.3.5.1-alpha):
4591 - Fix a bug warning when closing an HTTP tunnel connection due to an
4592 HTTP request we couldn't handle. Fixes bug 26470; bugfix
4595 o Minor bugfixes (netflow padding, backport from 0.3.5.1-alpha):
4596 - Ensure circuitmux queues are empty before scheduling or sending
4597 padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
4599 o Minor bugfixes (onion service v3, backport from 0.3.5.1-alpha):
4600 - When the onion service directory can't be created or has the wrong
4601 permissions, do not log a stack trace. Fixes bug 27335; bugfix
4604 o Minor bugfixes (onion service v3, backport from 0.3.5.2-alpha):
4605 - Close all SOCKS request (for the same .onion) if the newly fetched
4606 descriptor is unusable. Before that, we would close only the first
4607 one leaving the other hanging and let to time out by themselves.
4608 Fixes bug 27410; bugfix on 0.3.2.1-alpha.
4610 o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
4611 - When selecting a v3 rendezvous point, don't only look at the
4612 protover, but also check whether the curve25519 onion key is
4613 present. This way we avoid picking a relay that supports the v3
4614 rendezvous but for which we don't have the microdescriptor. Fixes
4615 bug 27797; bugfix on 0.3.2.1-alpha.
4617 o Minor bugfixes (protover, backport from 0.3.5.3-alpha):
4618 - Reject protocol names containing bytes other than alphanumeric
4619 characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
4622 o Minor bugfixes (rust, backport from 0.3.5.1-alpha):
4623 - Compute protover votes correctly in the rust version of the
4624 protover code. Previously, the protover rewrite in 24031 allowed
4625 repeated votes from the same voter for the same protocol version
4626 to be counted multiple times in protover_compute_vote(). Fixes bug
4627 27649; bugfix on 0.3.3.5-rc.
4628 - Reject protover names that contain invalid characters. Fixes bug
4629 27687; bugfix on 0.3.3.1-alpha.
4631 o Minor bugfixes (rust, backport from 0.3.5.2-alpha):
4632 - protover_all_supported() would attempt to allocate up to 16GB on
4633 some inputs, leading to a potential memory DoS. Fixes bug 27206;
4634 bugfix on 0.3.3.5-rc.
4636 o Minor bugfixes (rust, directory authority, to appear in 0.3.5.4-alpha):
4637 - Fix an API mismatch in the rust implementation of
4638 protover_compute_vote(). This bug could have caused crashes on any
4639 directory authorities running Tor with Rust (which we do not yet
4640 recommend). Fixes bug 27741; bugfix on 0.3.3.6.
4642 o Minor bugfixes (rust, to appear in 0.3.5.4-alpha):
4643 - Fix a potential null dereference in protover_all_supported(). Add
4644 a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
4645 - Return a string that can be safely freed by C code, not one
4646 created by the rust allocator, in protover_all_supported(). Fixes
4647 bug 27740; bugfix on 0.3.3.1-alpha.
4649 o Minor bugfixes (testing, backport from 0.3.5.1-alpha):
4650 - If a unit test running in a subprocess exits abnormally or with a
4651 nonzero status code, treat the test as having failed, even if the
4652 test reported success. Without this fix, memory leaks don't cause
4653 the tests to fail, even with LeakSanitizer. Fixes bug 27658;
4654 bugfix on 0.2.2.4-alpha.
4656 o Minor bugfixes (testing, backport from 0.3.5.3-alpha):
4657 - Make the hs_service tests use the same time source when creating
4658 the introduction point and when testing it. Now tests work better
4659 on very slow systems like ARM or Travis. Fixes bug 27810; bugfix
4662 o Minor bugfixes (testing, to appear in 0.3.5.4-alpha):
4663 - Treat backtrace test failures as expected on BSD-derived systems
4664 (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
4665 (FreeBSD failures have been treated as expected since 18204 in
4666 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
4669 Changes in version 0.3.5.3-alpha - 2018-10-17
4670 Tor 0.3.5.3-alpha fixes several bugs, mostly from previous 0.3.5.x
4671 versions. One important fix for relays addresses a problem with rate-
4672 limiting code from back in 0.3.4.x: If the fix works out, we'll be
4673 backporting it soon. This release is still an alpha, but we hope it's
4674 getting closer and closer to stability.
4676 o Major features (onion services):
4677 - Version 3 onion services can now use the per-service
4678 HiddenServiceExportCircuitID option to differentiate client
4679 circuits. It communicates with the service by using the HAProxy
4680 protocol to assign virtual IP addresses to inbound client
4681 circuits. Closes ticket 4700. Patch by Mahrud Sayrafi.
4683 o Major bugfixes (compilation):
4684 - Fix compilation on ARM (and other less-used CPUs) when compiling
4685 with OpenSSL before 1.1. Fixes bug 27781; bugfix on 0.3.4.1-alpha.
4687 o Major bugfixes (initialization, crash):
4688 - Fix an assertion crash that would stop Tor from starting up if it
4689 tried to activate a periodic event too early. Fixes bug 27861;
4690 bugfix on 0.3.5.1-alpha.
4692 o Major bugfixes (mainloop, bootstrap):
4693 - Make sure Tor bootstraps and works properly if only the
4694 ControlPort is set. Prior to this fix, Tor would only bootstrap
4695 when a client port was set (Socks, Trans, NATD, DNS or HTTPTunnel
4696 port). Fixes bug 27849; bugfix on 0.3.4.1-alpha.
4698 o Major bugfixes (relay):
4699 - When our write bandwidth limit is exhausted, stop writing on the
4700 connection. Previously, we had a typo in the code that would make
4701 us stop reading instead, leading to relay connections being stuck
4702 indefinitely and consuming kernel RAM. Fixes bug 28089; bugfix
4705 o Minor features (continuous integration):
4706 - Use the Travis Homebrew addon to install packages on macOS during
4707 Travis CI. The package list is the same, but the Homebrew addon
4708 does not do a `brew update` by default. Implements ticket 27738.
4709 - Report what program produced the mysterious core file that we
4710 occasionally see on Travis CI during make distcheck. Closes
4713 o Minor features (geoip):
4714 - Update geoip and geoip6 to the October 9 2018 Maxmind GeoLite2
4715 Country database. Closes ticket 27991.
4717 o Minor bugfixes (code safety):
4718 - Rewrite our assertion macros so that they no longer suppress the
4719 compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
4722 o Minor bugfixes (compilation):
4723 - Compile the ed25519-donna code with a correct declaration of
4724 crypto_strongest_rand(). Previously, we built it with one type,
4725 but linked it against another in the unit tests, which caused
4726 compilation failures with LTO enabled. This could have caused
4727 other undefined behavior in the tests. Fixes bug 27728; bugfix
4730 o Minor bugfixes (compilation, netbsd):
4731 - Add a missing include back into procmon.c. Fixes bug 27990; bugfix
4734 o Minor bugfixes (continuous integration, appveyor):
4735 - Install only the necessary mingw packages during our appveyor
4736 builds. This change makes the build a little faster, and prevents
4737 a conflict with a preinstalled mingw openssl that appveyor now
4738 ships. Fixes bugs 27765 and 27943; bugfix on 0.3.4.2-alpha.
4740 o Minor bugfixes (directory permissions):
4741 - When a user requests a group-readable DataDirectory, give it to
4742 them. Previously, when the DataDirectory and the CacheDirectory
4743 were the same, the default setting (0) for
4744 CacheDirectoryGroupReadable would override the setting for
4745 DataDirectoryGroupReadable. Fixes bug 26913; bugfix
4748 o Minor bugfixes (memory leaks):
4749 - Fix a small memory leak when calling Tor with --dump-config. Fixes
4750 bug 27893; bugfix on 0.3.2.1-alpha.
4752 o Minor bugfixes (networking):
4753 - In retry_listeners_ports(), make sure that we're removing a member
4754 of old_conns smartlist at most once. Fixes bug 27808; bugfix
4756 - Refrain from attempting socket rebinding when old and new
4757 listeners are in different address families. Fixes bug 27928;
4758 bugfix on 0.3.5.1-alpha.
4760 o Minor bugfixes (onion service v3):
4761 - Stop dumping a stack trace when trying to connect to an intro
4762 point without having a descriptor for it. Fixes bug 27774; bugfix
4764 - Don't warn so loudly when Tor is unable to decode an onion
4765 descriptor. This can now happen as a normal use case if a client
4766 gets a descriptor with client authorization but the client is not
4767 authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
4768 - When selecting a v3 rendezvous point, don't only look at the
4769 protover, but also check whether the curve25519 onion key is
4770 present. This way we avoid picking a relay that supports the v3
4771 rendezvous but for which we don't have the microdescriptor. Fixes
4772 bug 27797; bugfix on 0.3.2.1-alpha.
4774 o Minor bugfixes (protover):
4775 - Reject protocol names containing bytes other than alphanumeric
4776 characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
4779 o Minor bugfixes (testing):
4780 - Make the hs_service tests use the same time source when creating
4781 the introduction point and when testing it. Now tests work better
4782 on very slow systems like ARM or Travis. Fixes bug 27810; bugfix
4784 - In test_rebind.py, check if the Python version is in the supported
4785 range. Fixes bug 27675; bugfix on 0.3.5.1-alpha.
4787 o Code simplification and refactoring:
4788 - Divide more large Tor source files -- especially ones that span
4789 multiple areas of functionality -- into smaller parts, including
4790 onion.c and main.c. Closes ticket 26747.
4791 - Divide the "routerparse.c" module into separate modules for each
4792 group of parsed objects. Closes ticket 27924.
4793 - Move protover_rust.c to the same place protover.c was moved to.
4794 Closes ticket 27814.
4795 - Split directory.c into separate pieces for client, server, and
4796 common functionality. Closes ticket 26744.
4797 - Split the non-statistics-related parts from the rephist.c and
4798 geoip.c modules. Closes ticket 27892.
4799 - Split the router.c file into relay-only and shared components, to
4800 help with future modularization. Closes ticket 27864.
4803 - In the tor-resolve(1) manpage, fix the reference to socks-
4804 extensions.txt by adding a web URL. Resolves ticket 27853.
4805 - Mention that we require Python to be 2.7 or newer for some
4806 integration tests that we ship with Tor. Resolves ticket 27677.
4809 Changes in version 0.3.5.2-alpha - 2018-09-21
4810 Tor 0.3.5.2-alpha fixes several bugs in 0.3.5.1-alpha, including one
4811 that made Tor think it had run out of sockets. Anybody running a relay
4812 or an onion service on 0.3.5.1-alpha should upgrade.
4814 o Major bugfixes (relay bandwidth statistics):
4815 - When we close relayed circuits, report the data in the circuit
4816 queues as being written in our relay bandwidth stats. This
4817 mitigates guard discovery and other attacks that close circuits
4818 for the explicit purpose of noticing this discrepancy in
4819 statistics. Fixes bug 23512; bugfix on 0.0.8pre3.
4821 o Major bugfixes (socket accounting):
4822 - In our socket accounting code, count a socket as closed even when
4823 it is closed indirectly by the TLS layer. Previously, we would
4824 count these sockets as still in use, and incorrectly believe that
4825 we had run out of sockets. Fixes bug 27795; bugfix
4828 o Minor bugfixes (32-bit OSX and iOS, timing):
4829 - Fix an integer overflow bug in our optimized 32-bit millisecond-
4830 difference algorithm for 32-bit Apple platforms. Previously, it
4831 would overflow when calculating the difference between two times
4832 more than 47 days apart. Fixes part of bug 27139; bugfix
4834 - Improve the precision of our 32-bit millisecond difference
4835 algorithm for 32-bit Apple platforms. Fixes part of bug 27139;
4836 bugfix on 0.3.4.1-alpha.
4837 - Relax the tolerance on the mainloop/update_time_jumps test when
4838 running on 32-bit Apple platforms. Fixes part of bug 27139; bugfix
4841 o Minor bugfixes (onion service v3):
4842 - Close all SOCKS request (for the same .onion) if the newly fetched
4843 descriptor is unusable. Before that, we would close only the first
4844 one leaving the other hanging and let to time out by themselves.
4845 Fixes bug 27410; bugfix on 0.3.2.1-alpha.
4847 o Minor bugfixes (memory leak):
4848 - Fix an unlikely memory leak when trying to read a private key from
4849 a ridiculously large file. Fixes bug 27764; bugfix on
4850 0.3.5.1-alpha. This is CID 1439488.
4852 o Minor bugfixes (NSS):
4853 - Correctly detect failure to open a dummy TCP socket when stealing
4854 ownership of an fd from the NSS layer. Fixes bug 27782; bugfix
4857 o Minor bugfixes (rust):
4858 - protover_all_supported() would attempt to allocate up to 16GB on
4859 some inputs, leading to a potential memory DoS. Fixes bug 27206;
4860 bugfix on 0.3.3.5-rc.
4862 o Minor bugfixes (testing):
4863 - Revise the "conditionvar_timeout" test so that it succeeds even on
4864 heavily loaded systems where the test threads are not scheduled
4865 within 200 msec. Fixes bug 27073; bugfix on 0.2.6.3-alpha.
4867 o Code simplification and refactoring:
4868 - Divide the routerlist.c and dirserv.c modules into smaller parts.
4869 Closes ticket 27799.
4872 Changes in version 0.3.5.1-alpha - 2018-09-18
4873 Tor 0.3.5.1-alpha is the first release of the 0.3.5.x series. It adds
4874 client authorization for modern (v3) onion services, improves
4875 bootstrap reporting, begins reorganizing Tor's codebase, adds optional
4876 support for NSS in place of OpenSSL, and much more.
4878 o Major features (onion services, UI change):
4879 - For a newly created onion service, the default version is now 3.
4880 Tor still supports existing version 2 services, but the operator
4881 now needs to set "HiddenServiceVersion 2" in order to create a new
4882 version 2 service. For existing services, Tor now learns the
4883 version by reading the key file. Closes ticket 27215.
4885 o Major features (relay, UI change):
4886 - Relays no longer run as exits by default. If the "ExitRelay"
4887 option is auto (or unset), and no exit policy is specified with
4888 ExitPolicy or ReducedExitPolicy, we now treat ExitRelay as 0.
4889 Previously in this case, we allowed exit traffic and logged a
4890 warning message. Closes ticket 21530. Patch by Neel Chauhan.
4891 - Tor now validates that the ContactInfo config option is valid UTF-
4892 8 when parsing torrc. Closes ticket 27428.
4894 o Major features (bootstrap):
4895 - Don't report directory progress until after a connection to a
4896 relay or bridge has succeeded. Previously, we'd report 80%
4897 progress based on cached directory information when we couldn't
4898 even connect to the network. Closes ticket 27169.
4900 o Major features (new code layout):
4901 - Nearly all of Tor's source code has been moved around into more
4902 logical places. The "common" directory is now divided into a set
4903 of libraries in "lib", and files in the "or" directory have been
4904 split into "core" (logic absolutely needed for onion routing),
4905 "feature" (independent modules in Tor), and "app" (to configure
4906 and invoke the rest of Tor). See doc/HACKING/CodeStructure.md for
4907 more information. Closes ticket 26481.
4909 This refactoring is not complete: although the libraries have been
4910 refactored to be acyclic, the main body of Tor is still too
4911 interconnected. We will attempt to improve this in the future.
4913 o Major features (onion services v3):
4914 - Implement onion service client authorization at the descriptor
4915 level: only authorized clients can decrypt a service's descriptor
4916 to find out how to contact it. A new torrc option was added to
4917 control this client side: ClientOnionAuthDir <path>. On the
4918 service side, if the "authorized_clients/" directory exists in the
4919 onion service directory path, client configurations are read from
4920 the files within. See the manpage for more details. Closes ticket
4921 27547. Patch done by Suphanat Chunhapanya (haxxpop).
4922 - Improve revision counter generation in next-gen onion services.
4923 Onion services can now scale by hosting multiple instances on
4924 different hosts without synchronization between them, which was
4925 previously impossible because descriptors would get rejected by
4926 HSDirs. Addresses ticket 25552.
4928 o Major features (portability, cryptography, experimental, TLS):
4929 - Tor now has the option to compile with the NSS library instead of
4930 OpenSSL. This feature is experimental, and we expect that bugs may
4931 remain. It is mainly intended for environments where Tor's
4932 performance is not CPU-bound, and where NSS is already known to be
4933 installed. To try it out, configure Tor with the --enable-nss
4934 flag. Closes tickets 26631, 26815, and 26816.
4936 If you are experimenting with this option and using an old cached
4937 consensus, Tor may fail to start. To solve this, delete your
4938 "cached-consensus" and "cached-microdesc-consensus" files,
4939 (if present), and restart Tor.
4941 o Major bugfixes (directory authority):
4942 - Actually check that the address we get from DirAuthority
4943 configuration line is valid IPv4. Explicitly disallow DirAuthority
4944 address to be a DNS hostname. Fixes bug 26488; bugfix
4947 o Major bugfixes (restart-in-process):
4948 - Fix a use-after-free error that could be caused by passing Tor an
4949 impossible set of options that would fail during options_act().
4950 Fixes bug 27708; bugfix on 0.3.3.1-alpha.
4952 o Minor features (admin tools):
4953 - Add a new --key-expiration option to print the expiration date of
4954 the signing cert in an ed25519_signing_cert file. Resolves
4957 o Minor features (build):
4958 - If you pass the "--enable-pic" option to configure, Tor will try
4959 to tell the compiler to build position-independent code suitable
4960 to link into a dynamic library. (The default remains -fPIE, for
4961 code suitable for a relocatable executable.) Closes ticket 23846.
4963 o Minor features (code correctness, testing):
4964 - Tor's build process now includes a "check-includes" make target to
4965 verify that no module of Tor relies on any headers from a higher-
4966 level module. We hope to use this feature over time to help
4967 refactor our codebase. Closes ticket 26447.
4969 o Minor features (code layout):
4970 - We have a new "lowest-level" error-handling API for use by code
4971 invoked from within the logging module. With this interface, the
4972 logging code is no longer at risk of calling into itself if a
4973 failure occurs while it is trying to log something. Closes
4976 o Minor features (compilation):
4977 - Tor's configure script now supports a --with-malloc= option to
4978 select your malloc implementation. Supported options are
4979 "tcmalloc", "jemalloc", "openbsd" (deprecated), and "system" (the
4980 default). Addresses part of ticket 20424. Based on a patch from
4983 o Minor features (config):
4984 - The "auto" keyword in torrc is now case-insensitive. Closes
4987 o Minor features (continuous integration):
4988 - Don't do a distcheck with --disable-module-dirauth in Travis.
4989 Implements ticket 27252.
4990 - Install libcap-dev and libseccomp2-dev so these optional
4991 dependencies get tested on Travis CI. Closes ticket 26560.
4992 - Only run one online rust build in Travis, to reduce network
4993 errors. Skip offline rust builds on Travis for Linux gcc, because
4994 they're redundant. Implements ticket 27252.
4995 - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
4996 duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
4997 Linux with default settings, because all the non-default builds
4998 use gcc on Linux. Implements ticket 27252.
5000 o Minor features (controller):
5001 - Emit CIRC_BW events as soon as we detect that we processed an
5002 invalid or otherwise dropped cell on a circuit. This allows
5003 vanguards and other controllers to react more quickly to dropped
5004 cells. Closes ticket 27678.
5005 - For purposes of CIRC_BW-based dropped cell detection, track half-
5006 closed stream ids, and allow their ENDs, SENDMEs, DATA and path
5007 bias check cells to arrive without counting it as dropped until
5008 either the END arrives, or the windows are empty. Closes
5010 - Implement a 'GETINFO md/all' controller command to enable getting
5011 all known microdescriptors. Closes ticket 8323.
5012 - The GETINFO command now support an "uptime" argument, to return
5013 Tor's uptime in seconds. Closes ticket 25132.
5015 o Minor features (denial-of-service avoidance):
5016 - Make our OOM handler aware of the DNS cache so that it doesn't
5017 fill up the memory. This check is important for our DoS mitigation
5018 subsystem. Closes ticket 18642. Patch by Neel Chauhan.
5020 o Minor features (development):
5021 - Tor's makefile now supports running the "clippy" Rust style tool
5022 on our Rust code. Closes ticket 22156.
5024 o Minor features (directory authority):
5025 - There is no longer an artificial upper limit on the length of
5026 bandwidth lines. Closes ticket 26223.
5027 - When a bandwidth file is used to obtain the bandwidth measurements,
5028 include this bandwidth file headers in the votes. Closes
5030 - Improved support for networks with only a single authority or a
5031 single fallback directory. Patch from Gabriel Somlo. Closes
5034 o Minor features (embedding API):
5035 - The Tor controller API now supports a function to launch Tor with
5036 a preconstructed owning controller FD, so that embedding
5037 applications don't need to manage controller ports and
5038 authentication. Closes ticket 24204.
5039 - The Tor controller API now has a function that returns the name
5040 and version of the backend implementing the API. Closes
5043 o Minor features (geoip):
5044 - Update geoip and geoip6 to the September 6 2018 Maxmind GeoLite2
5045 Country database. Closes ticket 27631.
5047 o Minor features (memory management):
5048 - Get Libevent to use the same memory allocator as Tor, by calling
5049 event_set_mem_functions() during initialization. Resolves
5052 o Minor features (memory usage):
5053 - When not using them, store legacy TAP public onion keys in DER-
5054 encoded format, rather than as expanded public keys. This should
5055 save several megabytes on typical clients. Closes ticket 27246.
5057 o Minor features (OpenSSL):
5058 - When possible, use RFC5869 HKDF implementation from OpenSSL rather
5059 than our own. Resolves ticket 19979.
5061 o Minor features (Rust, code quality):
5062 - Improve rust code quality in the rust protover implementation by
5063 making it more idiomatic. Includes changing an internal API to
5064 take &str instead of &String. Closes ticket 26492.
5066 o Minor features (testing):
5067 - Add scripts/test/chutney-git-bisect.sh, for bisecting using
5068 chutney. Implements ticket 27211.
5070 o Minor features (tor-resolve):
5071 - The tor-resolve utility can now be used with IPv6 SOCKS proxies.
5072 Side-effect of the refactoring for ticket 26526.
5074 o Minor features (UI):
5075 - Log each included configuration file or directory as we read it,
5076 to provide more visibility about where Tor is reading from. Patch
5077 from Unto Sten; closes ticket 27186.
5078 - Lower log level of "Scheduler type KIST has been enabled" to INFO.
5079 Closes ticket 26703.
5081 o Minor bugfixes (bootstrap):
5082 - Try harder to get descriptors in non-exit test networks, by using
5083 the mid weight for the third hop when there are no exits. Fixes
5084 bug 27237; bugfix on 0.2.6.2-alpha.
5086 o Minor bugfixes (C correctness):
5087 - Avoid casting smartlist index to int implicitly, as it may trigger
5088 a warning (-Wshorten-64-to-32). Fixes bug 26282; bugfix on
5089 0.2.3.13-alpha, 0.2.7.1-alpha and 0.2.1.1-alpha.
5090 - Use time_t for all values in
5091 predicted_ports_prediction_time_remaining(). Rework the code that
5092 computes difference between durations/timestamps. Fixes bug 27165;
5093 bugfix on 0.3.1.1-alpha.
5095 o Minor bugfixes (client, memory usage):
5096 - When not running as a directory cache, there is no need to store
5097 the text of the current consensus networkstatus in RAM.
5098 Previously, however, clients would store it anyway, at a cost of
5099 over 5 MB. Now, they do not. Fixes bug 27247; bugfix
5102 o Minor bugfixes (client, reachableaddresses):
5103 - Instead of adding a "reject *:*" line to ReachableAddresses when
5104 loading the configuration, add one to the policy after parsing it
5105 in parse_reachable_addresses(). This prevents extra "reject *.*"
5106 lines from accumulating on reloads. Fixes bug 20874; bugfix on
5107 0.1.1.5-alpha. Patch by Neel Chauhan.
5109 o Minor bugfixes (code quality):
5110 - Rename sandbox_getaddrinfo() and other functions to no longer
5111 misleadingly suggest that they are sandbox-only. Fixes bug 26525;
5112 bugfix on 0.2.7.1-alpha.
5114 o Minor bugfixes (configuration, Onion Services):
5115 - In rend_service_parse_port_config(), disallow any input to remain
5116 after address-port pair was parsed. This will catch address and
5117 port being whitespace-separated by mistake of the user. Fixes bug
5118 27044; bugfix on 0.2.9.10.
5120 o Minor bugfixes (continuous integration):
5121 - Stop reinstalling identical packages in our Windows CI. Fixes bug
5122 27464; bugfix on 0.3.4.1-alpha.
5124 o Minor bugfixes (controller):
5125 - Consider all routerinfo errors other than "not a server" to be
5126 transient for the purpose of "GETINFO exit-policy/*" controller
5127 request. Print stacktrace in the unlikely case of failing to
5128 recompute routerinfo digest. Fixes bug 27034; bugfix
5131 o Minor bugfixes (directory connection shutdown):
5132 - Avoid a double-close when shutting down a stalled directory
5133 connection. Fixes bug 26896; bugfix on 0.3.4.1-alpha.
5135 o Minor bugfixes (HTTP tunnel):
5136 - Fix a bug warning when closing an HTTP tunnel connection due to an
5137 HTTP request we couldn't handle. Fixes bug 26470; bugfix
5140 o Minor bugfixes (ipv6):
5141 - In addrs_in_same_network_family(), we choose the subnet size based
5142 on the IP version (IPv4 or IPv6). Previously, we chose a fixed
5143 subnet size of /16 for both IPv4 and IPv6 addresses. Fixes bug
5144 15518; bugfix on 0.2.3.1-alpha. Patch by Neel Chauhan.
5146 o Minor bugfixes (logging):
5147 - As a precaution, do an early return from log_addr_has_changed() if
5148 Tor is running as client. Also, log a stack trace for debugging as
5149 this function should only be called when Tor runs as server. Fixes
5150 bug 26892; bugfix on 0.1.1.9-alpha.
5151 - Refrain from mentioning bug 21018 in the logs, as it is already
5152 fixed. Fixes bug 25477; bugfix on 0.2.9.8.
5154 o Minor bugfixes (logging, documentation):
5155 - When SafeLogging is enabled, scrub IP address in
5156 channel_tls_process_netinfo_cell(). Also, add a note to manpage
5157 that scrubbing is not guaranteed on loglevels below Notice. Fixes
5158 bug 26882; bugfix on 0.2.4.10-alpha.
5160 o Minor bugfixes (netflow padding):
5161 - Ensure circuitmux queues are empty before scheduling or sending
5162 padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
5164 o Minor bugfixes (onion service v2):
5165 - Log at level "info", not "warning", in the case that we do not
5166 have a consensus when a .onion request comes in. This can happen
5167 normally while bootstrapping. Fixes bug 27040; bugfix
5170 o Minor bugfixes (onion service v3):
5171 - When the onion service directory can't be created or has the wrong
5172 permissions, do not log a stack trace. Fixes bug 27335; bugfix
5175 o Minor bugfixes (OS compatibility):
5176 - Properly handle configuration changes that move a listener to/from
5177 wildcard IP address. If the first attempt to bind a socket fails,
5178 close the old listener and try binding the socket again. Fixes bug
5179 17873; bugfix on 0.0.8pre-1.
5181 o Minor bugfixes (performance)::
5182 - Rework node_is_a_configured_bridge() to no longer call
5183 node_get_all_orports(), which was performing too many memory
5184 allocations. Fixes bug 27224; bugfix on 0.2.3.9.
5186 o Minor bugfixes (relay statistics):
5187 - Update relay descriptor on bandwidth changes only when the uptime
5188 is smaller than 24h, in order to reduce the efficiency of guard
5189 discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
5191 o Minor bugfixes (relays):
5192 - Consider the fact that we'll be making direct connections to our
5193 entry and guard nodes when computing the fraction of nodes that
5194 have their descriptors. Also, if we are using bridges and there is
5195 at least one bridge with a full descriptor, treat the fraction of
5196 guards available as 100%. Fixes bug 25886; bugfix on 0.2.4.10-alpha.
5197 Patch by Neel Chauhan.
5198 - Update the message logged on relays when DirCache is disabled.
5199 Since 0.3.3.5-rc, authorities require DirCache (V2Dir) for the
5200 Guard flag. Fixes bug 24312; bugfix on 0.3.3.5-rc.
5202 o Minor bugfixes (rust, protover):
5203 - Compute protover votes correctly in the rust version of the
5204 protover code. Previously, the protover rewrite in 24031 allowed
5205 repeated votes from the same voter for the same protocol version
5206 to be counted multiple times in protover_compute_vote(). Fixes bug
5207 27649; bugfix on 0.3.3.5-rc.
5208 - Reject protover names that contain invalid characters. Fixes bug
5209 27687; bugfix on 0.3.3.1-alpha.
5211 o Minor bugfixes (testing):
5212 - Fix two unit tests to work when HOME environment variable is not
5213 set. Fixes bug 27096; bugfix on 0.2.8.1-alpha.
5214 - If a unit test running in a subprocess exits abnormally or with a
5215 nonzero status code, treat the test as having failed, even if the
5216 test reported success. Without this fix, memory leaks don't cause
5217 the tests to fail, even with LeakSanitizer. Fixes bug 27658;
5218 bugfix on 0.2.2.4-alpha.
5219 - When logging a version mismatch in our openssl_version tests,
5220 report the actual offending version strings. Fixes bug 26152;
5221 bugfix on 0.2.9.1-alpha.
5222 - Fix forking tests on Windows when there is a space somewhere in
5223 the path. Fixes bug 26437; bugfix on 0.2.2.4-alpha.
5225 o Code simplification and refactoring:
5226 - 'updateFallbackDirs.py' now ignores the blacklist file, as it's not
5227 longer needed. Closes ticket 26502.
5228 - Include paths to header files within Tor are now qualified by
5229 directory within the top-level src directory.
5230 - Many structures have been removed from the centralized "or.h"
5231 header, and moved into their own headers. This will allow us to
5232 reduce the number of places in the code that rely on each
5233 structure's contents and layout. Closes ticket 26383.
5234 - Remove ATTR_NONNULL macro from codebase. Resolves ticket 26527.
5235 - Remove GetAdaptersAddresses_fn_t. The code that used it was
5236 removed as part of the 26481 refactor. Closes ticket 27467.
5237 - Rework Tor SOCKS server code to use Trunnel and benefit from
5238 autogenerated functions for parsing and generating SOCKS wire
5239 format. New implementation is cleaner, more maintainable and
5240 should be less prone to heartbleed-style vulnerabilities.
5241 Implements a significant fraction of ticket 3569.
5242 - Split sampled_guards_update_from_consensus() and
5243 select_entry_guard_for_circuit() into subfunctions. In
5244 entry_guards_update_primary() unite three smartlist enumerations
5245 into one and move smartlist comparison code out of the function.
5246 Closes ticket 21349.
5247 - Tor now assumes that you have standards-conformant stdint.h and
5248 inttypes.h headers when compiling. Closes ticket 26626.
5249 - Unify our bloom filter logic. Previously we had two copies of this
5250 code: one for routerlist filtering, and one for address set
5251 calculations. Closes ticket 26510.
5252 - Use the simpler strcmpstart() helper in
5253 rend_parse_v2_service_descriptor instead of strncmp(). Closes
5255 - Utility functions that can perform a DNS lookup are now wholly
5256 separated from those that can't, in separate headers and C
5257 modules. Closes ticket 26526.
5260 - Copy paragraph and URL to Tor's code of conduct document from
5261 CONTRIBUTING to new CODE_OF_CONDUCT file. Resolves ticket 26638.
5262 - Remove old instructions from INSTALL document. Closes ticket 26588.
5263 - Warn users that they should not include MyFamily line(s) in their
5264 torrc when running Tor bridge. Closes ticket 26908.
5267 - Tor no longer supports building with the dmalloc library. For
5268 debugging memory issues, we suggest using gperftools or msan
5269 instead. Closes ticket 26426.
5270 - Tor no longer attempts to run on Windows environments without the
5271 GetAdaptersAddresses() function. This function has existed since
5272 Windows XP, which is itself already older than we support.
5273 - Remove Tor2web functionality for version 2 onion services. The
5274 Tor2webMode and Tor2webRendezvousPoints options are now obsolete.
5275 (This feature was never shipped in vanilla Tor and it was only
5276 possible to use this feature by building the support at compile
5277 time. Tor2webMode is not implemented for version 3 onion services.)
5278 Closes ticket 26367.
5281 Changes in version 0.2.9.17 - 2018-09-10
5282 Tor 0.2.9.17 backports numerous bugfixes from later versions of Tor.
5284 o Minor features (compatibility, backport from 0.3.4.8):
5285 - Tell OpenSSL to maintain backward compatibility with previous
5286 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
5287 ciphers are disabled by default. Closes ticket 27344.
5289 o Minor features (continuous integration, backport from 0.3.4.7-rc):
5290 - Enable macOS builds in our Travis CI configuration. Closes
5292 - Install libcap-dev and libseccomp2-dev so these optional
5293 dependencies get tested on Travis CI. Closes ticket 26560.
5294 - Run asciidoc during Travis CI. Implements ticket 27087.
5295 - Use ccache in our Travis CI configuration. Closes ticket 26952.
5297 o Minor features (geoip):
5298 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
5299 Country database. Closes ticket 27089.
5301 o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
5302 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
5303 tell the compiler not to include the system malloc implementation.
5304 Fixes bug 20424; bugfix on 0.2.0.20-rc.
5306 o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
5307 - Silence a spurious compiler warning on the GetAdaptersAddresses
5308 function pointer cast. This issue is already fixed by 26481 in
5309 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
5310 bugfix on 0.2.3.11-alpha.
5311 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
5312 supported, and always fails. Some compilers warn about the
5313 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
5316 o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
5317 - Don't link or search for pthreads when building for Windows, even
5318 if we are using build environment (like mingw) that provides a
5319 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
5321 o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
5322 - Skip a pair of unreliable key generation tests on Windows, until
5323 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
5324 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
5326 o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
5327 - Pass the module flags to distcheck configure, and log the flags
5328 before running configure. (Backported to 0.2.9 and later as a
5329 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
5331 o Minor bugfixes (continuous integration, backport from 0.3.4.8):
5332 - When a Travis build fails, and showing a log fails, keep trying to
5333 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
5334 - When we use echo in Travis, don't pass a --flag as the first
5335 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
5337 o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
5338 - When voting for recommended versions, make sure that all of the
5339 versions are well-formed and parsable. Fixes bug 26485; bugfix
5342 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
5343 - Fix a bug in out sandboxing rules for the openat() syscall.
5344 Previously, no openat() call would be permitted, which would break
5345 filesystem operations on recent glibc versions. Fixes bug 25440;
5346 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
5348 o Minor bugfixes (onion services, backport from 0.3.4.8):
5349 - Silence a spurious compiler warning in
5350 rend_client_send_introduction(). Fixes bug 27463; bugfix
5353 o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
5354 - Log a protocol warning when single onion services or Tor2web clients
5355 fail to authenticate direct connections to relays.
5356 Fixes bug 26924; bugfix on 0.2.9.1-alpha.
5358 o Minor bugfixes (testing, backport from 0.3.4.6-rc):
5359 - Disable core dumps in test_bt.sh, to avoid failures in "make
5360 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
5362 o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
5363 - Before running make test-network-all, delete old logs and test
5364 result files, to avoid spurious failures. Fixes bug 27295; bugfix
5367 o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
5368 - Our "tortls/cert_matches_key" unit test no longer relies on
5369 OpenSSL internals. Previously, it relied on unsupported OpenSSL
5370 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
5371 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
5373 o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
5374 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
5375 27185; bugfix on 0.2.2.2-alpha.
5378 Changes in version 0.3.2.12 - 2018-09-10
5379 Tor 0.3.2.12 backport numerous fixes from later versions of Tor.
5381 o Minor features (compatibility, backport from 0.3.4.8):
5382 - Tell OpenSSL to maintain backward compatibility with previous
5383 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
5384 ciphers are disabled by default. Closes ticket 27344.
5386 o Minor features (continuous integration, backport from 0.3.4.7-rc):
5387 - Enable macOS builds in our Travis CI configuration. Closes
5389 - Install libcap-dev and libseccomp2-dev so these optional
5390 dependencies get tested on Travis CI. Closes ticket 26560.
5391 - Run asciidoc during Travis CI. Implements ticket 27087.
5392 - Use ccache in our Travis CI configuration. Closes ticket 26952.
5394 o Minor features (continuous integration, rust, backport from 0.3.4.7-rc):
5395 - Use cargo cache in our Travis CI configuration. Closes
5398 o Minor features (controller, backport from 0.3.4.6-rc):
5399 - The control port now exposes the list of HTTPTunnelPorts and
5400 ExtOrPorts via GETINFO net/listeners/httptunnel and
5401 net/listeners/extor respectively. Closes ticket 26647.
5403 o Minor features (directory authorities, backport from 0.3.4.7-rc):
5404 - Authorities no longer vote to make the subprotocol version
5405 "LinkAuth=1" a requirement: it is unsupportable with NSS, and
5406 hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
5408 o Minor features (geoip):
5409 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
5410 Country database. Closes ticket 27089.
5412 o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
5413 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
5414 tell the compiler not to include the system malloc implementation.
5415 Fixes bug 20424; bugfix on 0.2.0.20-rc.
5416 - Don't try to use a pragma to temporarily disable the
5417 -Wunused-const-variable warning if the compiler doesn't support
5418 it. Fixes bug 26785; bugfix on 0.3.2.11.
5420 o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
5421 - Silence a spurious compiler warning on the GetAdaptersAddresses
5422 function pointer cast. This issue is already fixed by 26481 in
5423 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
5424 bugfix on 0.2.3.11-alpha.
5425 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
5426 supported, and always fails. Some compilers warn about the
5427 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
5430 o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
5431 - Don't link or search for pthreads when building for Windows, even
5432 if we are using build environment (like mingw) that provides a
5433 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
5435 o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
5436 - Skip a pair of unreliable key generation tests on Windows, until
5437 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
5438 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
5440 o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
5441 - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
5442 - Pass the module flags to distcheck configure, and log the flags
5443 before running configure. (Backported to 0.2.9 and later as a
5444 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
5446 o Minor bugfixes (continuous integration, backport from 0.3.4.8):
5447 - When a Travis build fails, and showing a log fails, keep trying to
5448 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
5449 - When we use echo in Travis, don't pass a --flag as the first
5450 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
5452 o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
5453 - When voting for recommended versions, make sure that all of the
5454 versions are well-formed and parsable. Fixes bug 26485; bugfix
5457 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
5458 - Fix a bug in out sandboxing rules for the openat() syscall.
5459 Previously, no openat() call would be permitted, which would break
5460 filesystem operations on recent glibc versions. Fixes bug 25440;
5461 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
5463 o Minor bugfixes (logging, backport from 0.3.4.6-rc):
5464 - Improve the log message when connection initiators fail to
5465 authenticate direct connections to relays. Fixes bug 26927; bugfix
5468 o Minor bugfixes (onion services, backport from 0.3.4.7-rc):
5469 - Fix bug that causes services to not ever rotate their descriptors
5470 if they were getting SIGHUPed often. Fixes bug 26932; bugfix
5473 o Minor bugfixes (onion services, backport from 0.3.4.8):
5474 - Silence a spurious compiler warning in
5475 rend_client_send_introduction(). Fixes bug 27463; bugfix
5478 o Minor bugfixes (rust, backport from 0.3.4.7-rc):
5479 - Backport test_rust.sh from master. Fixes bug 26497; bugfix
5481 - Consistently use ../../.. as a fallback for $abs_top_srcdir in
5482 test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
5483 - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
5484 $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
5486 o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
5487 - Log a protocol warning when single onion services or Tor2web clients
5488 fail to authenticate direct connections to relays.
5489 Fixes bug 26924; bugfix on 0.2.9.1-alpha.
5491 o Minor bugfixes (testing, backport from 0.3.4.6-rc):
5492 - Disable core dumps in test_bt.sh, to avoid failures in "make
5493 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
5495 o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
5496 - When running make test-network-all, use the mixed+hs-v2 network.
5497 (A previous fix to chutney removed v3 onion services from the
5498 mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
5499 confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
5500 - Before running make test-network-all, delete old logs and test
5501 result files, to avoid spurious failures. Fixes bug 27295; bugfix
5504 o Minor bugfixes (testing, openssl compatibility):
5505 - Our "tortls/cert_matches_key" unit test no longer relies on OpenSSL
5506 internals. Previously, it relied on unsupported OpenSSL behavior in
5507 a way that caused it to crash with OpenSSL 1.0.2p. Fixes bug 27226;
5508 bugfix on 0.2.5.1-alpha.
5510 o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
5511 - Our "tortls/cert_matches_key" unit test no longer relies on
5512 OpenSSL internals. Previously, it relied on unsupported OpenSSL
5513 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
5514 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
5516 o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
5517 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
5518 27185; bugfix on 0.2.2.2-alpha.
5521 Changes in version 0.3.3.10 - 2018-09-10
5522 Tor 0.3.3.10 backports numerous fixes from later versions of Tor.
5524 o Minor features (bug workaround, backport from 0.3.4.7-rc):
5525 - Compile correctly on systems that provide the C11 stdatomic.h
5526 header, but where C11 atomic functions don't actually compile.
5527 Closes ticket 26779; workaround for Debian issue 903709.
5529 o Minor features (compatibility, backport from 0.3.4.8):
5530 - Tell OpenSSL to maintain backward compatibility with previous
5531 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
5532 ciphers are disabled by default. Closes ticket 27344.
5534 o Minor features (continuous integration, backport from 0.3.4.7-rc):
5535 - Backport Travis rust distcheck to 0.3.3. Closes ticket 24629.
5536 - Enable macOS builds in our Travis CI configuration. Closes
5538 - Install libcap-dev and libseccomp2-dev so these optional
5539 dependencies get tested on Travis CI. Closes ticket 26560.
5540 - Run asciidoc during Travis CI. Implements ticket 27087.
5541 - Use ccache in our Travis CI configuration. Closes ticket 26952.
5543 o Minor features (continuous integration, rust, backport from 0.3.4.7-rc):
5544 - Use cargo cache in our Travis CI configuration. Closes
5547 o Minor features (controller, backport from 0.3.4.6-rc):
5548 - The control port now exposes the list of HTTPTunnelPorts and
5549 ExtOrPorts via GETINFO net/listeners/httptunnel and
5550 net/listeners/extor respectively. Closes ticket 26647.
5552 o Minor features (directory authorities, backport from 0.3.4.7-rc):
5553 - Authorities no longer vote to make the subprotocol version
5554 "LinkAuth=1" a requirement: it is unsupportable with NSS, and
5555 hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
5557 o Minor features (geoip):
5558 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
5559 Country database. Closes ticket 27089.
5561 o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
5562 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
5563 tell the compiler not to include the system malloc implementation.
5564 Fixes bug 20424; bugfix on 0.2.0.20-rc.
5565 - Don't try to use a pragma to temporarily disable the
5566 -Wunused-const-variable warning if the compiler doesn't support
5567 it. Fixes bug 26785; bugfix on 0.3.2.11.
5569 o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
5570 - Silence a spurious compiler warning on the GetAdaptersAddresses
5571 function pointer cast. This issue is already fixed by 26481 in
5572 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
5573 bugfix on 0.2.3.11-alpha.
5574 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
5575 supported, and always fails. Some compilers warn about the
5576 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
5579 o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
5580 - Don't link or search for pthreads when building for Windows, even
5581 if we are using build environment (like mingw) that provides a
5582 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
5584 o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
5585 - Skip a pair of unreliable key generation tests on Windows, until
5586 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
5587 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
5589 o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
5590 - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
5591 - Pass the module flags to distcheck configure, and log the flags
5592 before running configure. (Backported to 0.2.9 and later as a
5593 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
5595 o Minor bugfixes (continuous integration, backport from 0.3.4.8):
5596 - When a Travis build fails, and showing a log fails, keep trying to
5597 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
5598 - When we use echo in Travis, don't pass a --flag as the first
5599 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
5601 o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
5602 - When voting for recommended versions, make sure that all of the
5603 versions are well-formed and parsable. Fixes bug 26485; bugfix
5606 o Minor bugfixes (in-process restart, backport from 0.3.4.7-rc):
5607 - Always call tor_free_all() when leaving tor_run_main(). When we
5608 did not, restarting tor in-process would cause an assertion
5609 failure. Fixes bug 26948; bugfix on 0.3.3.1-alpha.
5611 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
5612 - Fix a bug in our sandboxing rules for the openat() syscall.
5613 Previously, no openat() call would be permitted, which would break
5614 filesystem operations on recent glibc versions. Fixes bug 25440;
5615 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
5617 o Minor bugfixes (logging, backport from 0.3.4.6-rc):
5618 - Improve the log message when connection initiators fail to
5619 authenticate direct connections to relays. Fixes bug 26927; bugfix
5622 o Minor bugfixes (onion services, backport from 0.3.4.7-rc):
5623 - Fix bug that causes services to not ever rotate their descriptors
5624 if they were getting SIGHUPed often. Fixes bug 26932; bugfix
5627 o Minor bugfixes (onion services, backport from 0.3.4.8):
5628 - Silence a spurious compiler warning in
5629 rend_client_send_introduction(). Fixes bug 27463; bugfix
5632 o Minor bugfixes (portability, backport from 0.3.4.6-rc):
5633 - Work around two different bugs in the OS X 10.10 and later SDKs
5634 that would prevent us from successfully targeting earlier versions
5635 of OS X. Fixes bug 26876; bugfix on 0.3.3.1-alpha.
5637 o Minor bugfixes (portability, backport from 0.3.4.7-rc):
5638 - Fix compilation of the unit tests on GNU/Hurd, which does not
5639 define PATH_MAX. Fixes bug 26873; bugfix on 0.3.3.1-alpha. Patch
5642 o Minor bugfixes (rust, backport from 0.3.4.7-rc):
5643 - Backport test_rust.sh from master. Fixes bug 26497; bugfix
5645 - Consistently use ../../.. as a fallback for $abs_top_srcdir in
5646 test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
5647 - Protover parsing was accepting the presence of whitespace in
5648 version strings, which the C implementation would choke on, e.g.
5649 "Desc=1\t,2". Fixes bug 27177; bugfix on 0.3.3.5-rc.
5650 - Protover parsing was ignoring a 2nd hyphen and everything after
5651 it, accepting entries like "Link=1-5-foo". Fixes bug 27164; bugfix
5653 - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
5654 $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
5655 - cd to ${abs_top_builddir}/src/rust before running cargo in
5656 src/test/test_rust.sh. This makes the working directory consistent
5657 between builds and tests. Fixes bug 26497; bugfix on 0.3.3.2-alpha.
5659 o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
5660 - Log a protocol warning when single onion services or Tor2web clients
5661 fail to authenticate direct connections to relays.
5662 Fixes bug 26924; bugfix on 0.2.9.1-alpha.
5664 o Minor bugfixes (testing, backport from 0.3.4.6-rc):
5665 - Disable core dumps in test_bt.sh, to avoid failures in "make
5666 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
5668 o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
5669 - When running make test-network-all, use the mixed+hs-v2 network.
5670 (A previous fix to chutney removed v3 onion services from the
5671 mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
5672 confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
5673 - Before running make test-network-all, delete old logs and test
5674 result files, to avoid spurious failures. Fixes bug 27295; bugfix
5677 o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
5678 - Our "tortls/cert_matches_key" unit test no longer relies on
5679 OpenSSL internals. Previously, it relied on unsupported OpenSSL
5680 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
5681 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
5683 o Minor bugfixes (v3 onion services, backport from 0.3.4.6-rc):
5684 - Stop sending ed25519 link specifiers in v3 onion service introduce
5685 cells and descriptors, when the rendezvous or introduction point
5686 doesn't support ed25519 link authentication. Fixes bug 26627;
5687 bugfix on 0.3.2.4-alpha.
5689 o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
5690 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
5691 27185; bugfix on 0.2.2.2-alpha.
5694 Changes in version 0.3.4.8 - 2018-09-10
5695 Tor 0.3.4.8 is the first stable release in its series; it includes
5696 compilation and portability fixes.
5698 The Tor 0.3.4 series includes improvements for running Tor in
5699 low-power and embedded environments, which should help performance in
5700 general. We've begun work on better modularity, and included preliminary
5701 changes on the directory authority side to accommodate a new bandwidth
5702 measurement system. We've also integrated more continuous-integration
5703 systems into our development process, and made corresponding changes to
5704 Tor's testing infrastructure. Finally, we've continued to refine
5705 our anti-denial-of-service code.
5707 Below are the changes since 0.3.4.7-rc. For a complete list of changes
5708 since 0.3.3.9, see the ReleaseNotes file.
5710 o Minor features (compatibility):
5711 - Tell OpenSSL to maintain backward compatibility with previous
5712 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
5713 ciphers are disabled by default. Closes ticket 27344.
5715 o Minor features (continuous integration):
5716 - Log the compiler path and version during Appveyor builds.
5717 Implements ticket 27449.
5718 - Show config.log and test-suite.log after failed Appveyor builds.
5719 Also upload the zipped full logs as a build artifact. Implements
5722 o Minor bugfixes (compilation):
5723 - Silence a spurious compiler warning on the GetAdaptersAddresses
5724 function pointer cast. This issue is already fixed by 26481 in
5725 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
5726 bugfix on 0.2.3.11-alpha.
5727 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
5728 supported, and always fails. Some compilers warn about the
5729 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
5732 o Minor bugfixes (continuous integration):
5733 - Disable gcc hardening in Appveyor Windows 64-bit builds. As of
5734 August 29 2018, Appveyor images come with gcc 8.2.0 by default.
5735 Executables compiled for 64-bit Windows with this version of gcc
5736 crash when Tor's --enable-gcc-hardening flag is set. Fixes bug
5737 27460; bugfix on 0.3.4.1-alpha.
5738 - When a Travis build fails, and showing a log fails, keep trying to
5739 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
5740 - When we use echo in Travis, don't pass a --flag as the first
5741 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
5743 o Minor bugfixes (onion services):
5744 - Silence a spurious compiler warning in
5745 rend_client_send_introduction(). Fixes bug 27463; bugfix
5748 o Minor bugfixes (testing, chutney):
5749 - When running make test-network-all, use the mixed+hs-v2 network.
5750 (A previous fix to chutney removed v3 onion services from the
5751 mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
5752 confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
5753 - Before running make test-network-all, delete old logs and test
5754 result files, to avoid spurious failures. Fixes bug 27295; bugfix
5757 Changes in version 0.3.4.7-rc - 2018-08-24
5758 Tor 0.3.4.7-rc fixes several small compilation, portability, and
5759 correctness issues in previous versions of Tor. This version is a
5760 release candidate: if no serious bugs are found, we expect that the
5761 stable 0.3.4 release will be (almost) the same as this release.
5763 o Minor features (bug workaround):
5764 - Compile correctly on systems that provide the C11 stdatomic.h
5765 header, but where C11 atomic functions don't actually compile.
5766 Closes ticket 26779; workaround for Debian issue 903709.
5768 o Minor features (continuous integration):
5769 - Backport Travis rust distcheck to 0.3.3. Closes ticket 24629.
5770 - Enable macOS builds in our Travis CI configuration. Closes
5772 - Install libcap-dev and libseccomp2-dev so these optional
5773 dependencies get tested on Travis CI. Closes ticket 26560.
5774 - Only post Appveyor IRC notifications when the build fails.
5775 Implements ticket 27275.
5776 - Run asciidoc during Travis CI. Implements ticket 27087.
5777 - Use ccache in our Travis CI configuration. Closes ticket 26952.
5779 o Minor features (continuous integration, rust):
5780 - Use cargo cache in our Travis CI configuration. Closes
5783 o Minor features (directory authorities):
5784 - Authorities no longer vote to make the subprotocol version
5785 "LinkAuth=1" a requirement: it is unsupportable with NSS, and
5786 hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
5788 o Minor features (geoip):
5789 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
5790 Country database. Closes ticket 27089.
5792 o Minor bugfixes (compilation, windows):
5793 - Don't link or search for pthreads when building for Windows, even
5794 if we are using build environment (like mingw) that provides a
5795 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
5797 o Minor bugfixes (continuous integration):
5798 - Improve Appveyor CI IRC logging. Generate correct branches and
5799 URLs for pull requests and tags. Use unambiguous short commits.
5800 Fixes bug 26979; bugfix on master.
5801 - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
5802 - Pass the module flags to distcheck configure, and log the flags
5803 before running configure. (Backported to 0.2.9 and later as a
5804 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
5806 o Minor bugfixes (in-process restart):
5807 - Always call tor_free_all() when leaving tor_run_main(). When we
5808 did not, restarting tor in-process would cause an assertion
5809 failure. Fixes bug 26948; bugfix on 0.3.3.1-alpha.
5811 o Minor bugfixes (linux seccomp2 sandbox):
5812 - Fix a bug in out sandboxing rules for the openat() syscall.
5813 Previously, no openat() call would be permitted, which would break
5814 filesystem operations on recent glibc versions. Fixes bug 25440;
5815 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
5817 o Minor bugfixes (onion services):
5818 - Fix bug that causes services to not ever rotate their descriptors
5819 if they were getting SIGHUPed often. Fixes bug 26932; bugfix
5822 o Minor bugfixes (portability):
5823 - Fix compilation of the unit tests on GNU/Hurd, which does not
5824 define PATH_MAX. Fixes bug 26873; bugfix on 0.3.3.1-alpha. Patch
5827 o Minor bugfixes (rust):
5828 - Backport test_rust.sh from master. Fixes bug 26497; bugfix
5830 - Consistently use ../../.. as a fallback for $abs_top_srcdir in
5831 test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
5832 - Protover parsing was accepting the presence of whitespace in
5833 version strings, which the C implementation would choke on, e.g.
5834 "Desc=1\t,2". Fixes bug 27177; bugfix on 0.3.3.5-rc.
5835 - Protover parsing was ignoring a 2nd hyphen and everything after
5836 it, accepting entries like "Link=1-5-foo". Fixes bug 27164; bugfix
5838 - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
5839 $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
5840 - cd to ${abs_top_builddir}/src/rust before running cargo in
5841 src/test/test_rust.sh. This makes the working directory consistent
5842 between builds and tests. Fixes bug 26497; bugfix on 0.3.3.2-alpha.
5844 o Minor bugfixes (testing, bootstrap):
5845 - When calculating bootstrap progress, check exit policies and the
5846 exit flag. Previously, Tor would only check the exit flag, which
5847 caused race conditions in small and fast networks like chutney.
5848 Fixes bug 27236; bugfix on 0.2.6.3-alpha.
5850 o Minor bugfixes (testing, openssl compatibility):
5851 - Our "tortls/cert_matches_key" unit test no longer relies on
5852 OpenSSL internals. Previously, it relied on unsupported OpenSSL
5853 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
5854 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
5856 o Minor bugfixes (Windows, compilation):
5857 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
5858 27185; bugfix on 0.2.2.2-alpha.
5861 Changes in version 0.3.4.6-rc - 2018-08-06
5862 Tor 0.3.4.6-rc fixes several small compilation, portability, and
5863 correctness issues in previous versions of Tor. This version is a
5864 release candidate: if no serious bugs are found, we expect that the
5865 stable 0.3.4 release will be (almost) the same as this release.
5867 o Major bugfixes (event scheduler):
5868 - When we enable a periodic event, schedule it in the event loop
5869 rather than running it immediately. Previously, we would re-run
5870 periodic events immediately in the middle of (for example)
5871 changing our options, with unpredictable effects. Fixes bug 27003;
5872 bugfix on 0.3.4.1-alpha.
5874 o Minor features (compilation):
5875 - When building Tor, prefer to use Python 3 over Python 2, and more
5876 recent (contemplated) versions over older ones. Closes
5878 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
5879 tell the compiler not to include the system malloc implementation.
5880 Fixes bug 20424; bugfix on 0.2.0.20-rc.
5881 - Don't try to use a pragma to temporarily disable the
5882 -Wunused-const-variable warning if the compiler doesn't support
5883 it. Fixes bug 26785; bugfix on 0.3.2.11.
5885 o Minor bugfixes (continuous integration):
5886 - Skip a pair of unreliable key generation tests on Windows, until
5887 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
5888 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
5890 o Minor features (controller):
5891 - The control port now exposes the list of HTTPTunnelPorts and
5892 ExtOrPorts via GETINFO net/listeners/httptunnel and
5893 net/listeners/extor respectively. Closes ticket 26647.
5895 o Minor bugfixes (directory authority):
5896 - When voting for recommended versions, make sure that all of the
5897 versions are well-formed and parsable. Fixes bug 26485; bugfix
5900 o Minor features (geoip):
5901 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
5902 Country database. Closes ticket 26674.
5904 o Minor features (Rust, portability):
5905 - Rust cross-compilation is now supported. Closes ticket 25895.
5907 o Minor bugfixes (compilation):
5908 - Update build system so that tor builds again with --disable-unittests
5909 after recent refactoring. Fixes bug 26789; bugfix on 0.3.4.3-alpha.
5910 - Fix a compilation warning on some versions of GCC when building
5911 code that calls routerinfo_get_my_routerinfo() twice, assuming
5912 that the second call will succeed if the first one did. Fixes bug
5913 26269; bugfix on 0.2.8.2-alpha.
5915 o Minor bugfixes (controller):
5916 - Report the port correctly when a port is configured to bind to
5917 "auto". Fixes bug 26568; bugfix on 0.3.4.1-alpha.
5918 - Parse the "HSADDRESS=" parameter in HSPOST commands properly.
5919 Previously, it was misparsed and ignored. Fixes bug 26523; bugfix
5920 on 0.3.3.1-alpha. Patch by "akwizgran".
5922 o Minor bugfixes (correctness, flow control):
5923 - Upon receiving a stream-level SENDME cell, verify that our window
5924 has not grown too large. Fixes bug 26214; bugfix on svn
5927 o Minor bugfixes (memory, correctness):
5928 - Fix a number of small memory leaks identified by coverity. Fixes
5929 bug 26467; bugfix on numerous Tor versions.
5931 o Minor bugfixes (logging):
5932 - Improve the log message when connection initiators fail to
5933 authenticate direct connections to relays. Fixes bug 26927; bugfix
5936 o Minor bugfixes (portability):
5937 - Avoid a compilation error in test_bwmgt.c on Solaris 10. Fixes bug
5938 26994; bugfix on 0.3.4.1-alpha.
5939 - Work around two different bugs in the OS X 10.10 and later SDKs
5940 that would prevent us from successfully targeting earlier versions
5941 of OS X. Fixes bug 26876; bugfix on 0.3.3.1-alpha.
5943 o Minor bugfixes (single onion services, Tor2web):
5944 - Log a protocol warning when single onion services or Tor2web
5945 clients fail to authenticate direct connections to relays. Fixes
5946 bug 26924; bugfix on 0.2.9.1-alpha.
5948 o Minor bugfixes (testing):
5949 - Disable core dumps in test_bt.sh, to avoid failures in "make
5950 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
5952 o Minor bugfixes (testing, compatibility):
5953 - When running the ntor_ref.py and hs_ntor_ref.py tests, make sure
5954 only to pass strings (rather than "bytes" objects) to the Python
5955 subprocess module. Python 3 on Windows seems to require this.
5956 Fixes bug 26535; bugfix on 0.2.5.5-alpha (for ntor_ref.py) and
5957 0.3.1.1-alpha (for hs_ntor_ref.py).
5959 o Minor bugfixes (v3 onion services):
5960 - Stop sending ed25519 link specifiers in v3 onion service introduce
5961 cells and descriptors, when the rendezvous or introduction point
5962 doesn't support ed25519 link authentication. Fixes bug 26627;
5963 bugfix on 0.3.2.4-alpha.
5966 Changes in version 0.3.4.5-rc - 2018-07-13
5967 Tor 0.3.4.5-rc moves to a new bridge authority, meaning people running
5968 bridge relays should upgrade.
5970 o Directory authority changes:
5971 - The "Bifroest" bridge authority has been retired; the new bridge
5972 authority is "Serge", and it is operated by George from the
5973 TorBSD project. Closes ticket 26771.
5976 Changes in version 0.3.3.9 - 2018-07-13
5977 Tor 0.3.3.9 moves to a new bridge authority, meaning people running
5978 bridge relays should upgrade.
5980 o Directory authority changes:
5981 - The "Bifroest" bridge authority has been retired; the new bridge
5982 authority is "Serge", and it is operated by George from the
5983 TorBSD project. Closes ticket 26771.
5986 Changes in version 0.3.2.11 - 2018-07-13
5987 Tor 0.3.2.11 moves to a new bridge authority, meaning people running
5988 bridge relays should upgrade. We also take this opportunity to backport
5991 o Directory authority changes:
5992 - The "Bifroest" bridge authority has been retired; the new bridge
5993 authority is "Serge", and it is operated by George from the
5994 TorBSD project. Closes ticket 26771.
5996 o Directory authority changes (backport from 0.3.3.7):
5997 - Add an IPv6 address for the "dannenberg" directory authority.
5998 Closes ticket 26343.
6000 o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
6001 - When directory authorities read a zero-byte bandwidth file, they
6002 would previously log a warning with the contents of an
6003 uninitialised buffer. They now log a warning about the empty file
6004 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
6006 o Major bugfixes (onion service, backport from 0.3.4.1-alpha):
6007 - Correctly detect when onion services get disabled after HUP. Fixes
6008 bug 25761; bugfix on 0.3.2.1.
6010 o Minor features (sandbox, backport from 0.3.3.4-alpha):
6011 - Explicitly permit the poll() system call when the Linux
6012 seccomp2-based sandbox is enabled: apparently, some versions of
6013 libc use poll() when calling getpwnam(). Closes ticket 25313.
6015 o Minor feature (continuous integration, backport from 0.3.3.5-rc):
6016 - Update the Travis CI configuration to use the stable Rust channel,
6017 now that we have decided to require that. Closes ticket 25714.
6019 o Minor features (continuous integration, backport from 0.3.4.1-alpha):
6020 - Our .travis.yml configuration now includes support for testing the
6021 results of "make distcheck". (It's not uncommon for "make check"
6022 to pass but "make distcheck" to fail.) Closes ticket 25814.
6023 - Our Travis CI configuration now integrates with the Coveralls
6024 coverage analysis tool. Closes ticket 25818.
6026 o Minor features (relay, diagnostic, backport from 0.3.4.3-alpha):
6027 - Add several checks to detect whether Tor relays are uploading
6028 their descriptors without specifying why they regenerated them.
6029 Diagnostic for ticket 25686.
6031 o Minor features (compilation, backport from 0.3.4.4-rc):
6032 - When building Tor, prefer to use Python 3 over Python 2, and more
6033 recent (contemplated) versions over older ones. Closes
6036 o Minor features (geoip):
6037 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
6038 Country database. Closes ticket 26674.
6040 o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
6041 - Upon receiving a malformed connected cell, stop processing the
6042 cell immediately. Previously we would mark the connection for
6043 close, but continue processing the cell as if the connection were
6044 open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
6046 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
6047 - Allow the nanosleep() system call, which glibc uses to implement
6048 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
6050 o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
6051 - When running the hs_ntor_ref.py test, make sure only to pass
6052 strings (rather than "bytes" objects) to the Python subprocess
6053 module. Python 3 on Windows seems to require this. Fixes bug
6054 26535; bugfix on 0.3.1.1-alpha.
6055 - When running the ntor_ref.py test, make sure only to pass strings
6056 (rather than "bytes" objects) to the Python subprocess module.
6057 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
6060 o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
6061 - Work around a change in OpenSSL 1.1.1 where return values that
6062 would previously indicate "no password" now indicate an empty
6063 password. Without this workaround, Tor instances running with
6064 OpenSSL 1.1.1 would accept descriptors that other Tor instances
6065 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
6067 o Minor bugfixes (documentation, backport from 0.3.3.5-rc):
6068 - Document that the PerConnBW{Rate,Burst} options will fall back to
6069 their corresponding consensus parameters only if those parameters
6070 are set. Previously we had claimed that these values would always
6071 be set in the consensus. Fixes bug 25296; bugfix on 0.2.2.7-alpha.
6073 o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
6074 - Fix a compilation warning on some versions of GCC when building
6075 code that calls routerinfo_get_my_routerinfo() twice, assuming
6076 that the second call will succeed if the first one did. Fixes bug
6077 26269; bugfix on 0.2.8.2-alpha.
6079 o Minor bugfixes (client, backport from 0.3.4.1-alpha):
6080 - Don't consider Tor running as a client if the ControlPort is open,
6081 but no actual client ports are open. Fixes bug 26062; bugfix
6084 o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
6085 - Prevent a possible out-of-bounds smartlist read in
6086 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
6088 o Minor bugfixes (C correctness, backport from 0.3.3.4-alpha):
6089 - Fix a very unlikely (impossible, we believe) null pointer
6090 dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
6091 Coverity; this is CID 1430932.
6093 o Minor bugfixes (onion service, backport from 0.3.4.1-alpha):
6094 - Fix a memory leak when a v3 onion service is configured and gets a
6095 SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
6096 - When parsing the descriptor signature, look for the token plus an
6097 extra white-space at the end. This is more correct but also will
6098 allow us to support new fields that might start with "signature".
6099 Fixes bug 26069; bugfix on 0.3.0.1-alpha.
6101 o Minor bugfixes (relay, backport from 0.3.4.3-alpha):
6102 - Relays now correctly block attempts to re-extend to the previous
6103 relay by Ed25519 identity. Previously they would warn in this
6104 case, but not actually reject the attempt. Fixes bug 26158; bugfix
6107 o Minor bugfixes (relay, crash, backport from 0.3.4.1-alpha):
6108 - Avoid a crash when running with DirPort set but ORPort turned off.
6109 Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
6111 o Minor bugfixes (compilation, backport from 0.3.4.2-alpha):
6112 - Silence unused-const-variable warnings in zstd.h with some GCC
6113 versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
6115 o Minor bugfixes (testing, backport from 0.3.3.4-alpha):
6116 - Avoid intermittent test failures due to a test that had relied on
6117 onion service introduction point creation finishing within 5
6118 seconds of real clock time. Fixes bug 25450; bugfix
6121 o Minor bugfixes (compilation, backport from 0.3.3.4-alpha):
6122 - Fix a C99 compliance issue in our configuration script that caused
6123 compilation issues when compiling Tor with certain versions of
6124 xtools. Fixes bug 25474; bugfix on 0.3.2.5-alpha.
6126 o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
6127 - Fix a number of small memory leaks identified by coverity. Fixes
6128 bug 26467; bugfix on numerous Tor versions.
6130 o Code simplification and refactoring (backport from 0.3.3.5-rc):
6131 - Move the list of default directory authorities to its own file.
6132 Closes ticket 24854. Patch by "beastr0".
6135 Changes in version 0.2.9.16 - 2018-07-13
6136 Tor 0.2.9.16 moves to a new bridge authority, meaning people running
6137 bridge relays should upgrade. We also take this opportunity to backport
6140 o Directory authority changes:
6141 - The "Bifroest" bridge authority has been retired; the new bridge
6142 authority is "Serge", and it is operated by George from the
6143 TorBSD project. Closes ticket 26771.
6145 o Directory authority changes (backport from 0.3.3.7):
6146 - Add an IPv6 address for the "dannenberg" directory authority.
6147 Closes ticket 26343.
6149 o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
6150 - When directory authorities read a zero-byte bandwidth file, they
6151 would previously log a warning with the contents of an
6152 uninitialised buffer. They now log a warning about the empty file
6153 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
6155 o Minor features (sandbox, backport from 0.3.3.4-alpha):
6156 - Explicitly permit the poll() system call when the Linux
6157 seccomp2-based sandbox is enabled: apparently, some versions of
6158 libc use poll() when calling getpwnam(). Closes ticket 25313.
6160 o Minor features (continuous integration, backport from 0.3.4.1-alpha):
6161 - Our .travis.yml configuration now includes support for testing the
6162 results of "make distcheck". (It's not uncommon for "make check"
6163 to pass but "make distcheck" to fail.) Closes ticket 25814.
6164 - Our Travis CI configuration now integrates with the Coveralls
6165 coverage analysis tool. Closes ticket 25818.
6167 o Minor features (compilation, backport from 0.3.4.4-rc):
6168 - When building Tor, prefer to use Python 3 over Python 2, and more
6169 recent (contemplated) versions over older ones. Closes
6172 o Minor features (geoip):
6173 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
6174 Country database. Closes ticket 26674.
6176 o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
6177 - Upon receiving a malformed connected cell, stop processing the
6178 cell immediately. Previously we would mark the connection for
6179 close, but continue processing the cell as if the connection were
6180 open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
6182 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
6183 - Allow the nanosleep() system call, which glibc uses to implement
6184 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
6186 o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
6187 - When running the ntor_ref.py test, make sure only to pass strings
6188 (rather than "bytes" objects) to the Python subprocess module.
6189 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
6192 o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
6193 - Work around a change in OpenSSL 1.1.1 where return values that
6194 would previously indicate "no password" now indicate an empty
6195 password. Without this workaround, Tor instances running with
6196 OpenSSL 1.1.1 would accept descriptors that other Tor instances
6197 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
6199 o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
6200 - Fix a compilation warning on some versions of GCC when building
6201 code that calls routerinfo_get_my_routerinfo() twice, assuming
6202 that the second call will succeed if the first one did. Fixes bug
6203 26269; bugfix on 0.2.8.2-alpha.
6205 o Minor bugfixes (client, backport from 0.3.4.1-alpha):
6206 - Don't consider Tor running as a client if the ControlPort is open,
6207 but no actual client ports are open. Fixes bug 26062; bugfix
6210 o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
6211 - Prevent a possible out-of-bounds smartlist read in
6212 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
6214 o Minor bugfixes (C correctness, backport from 0.3.3.4-alpha):
6215 - Fix a very unlikely (impossible, we believe) null pointer
6216 dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
6217 Coverity; this is CID 1430932.
6219 o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
6220 - Fix a number of small memory leaks identified by coverity. Fixes
6221 bug 26467; bugfix on numerous Tor versions.
6223 o Code simplification and refactoring (backport from 0.3.3.5-rc):
6224 - Move the list of default directory authorities to its own file.
6225 Closes ticket 24854. Patch by "beastr0".
6228 Changes in version 0.3.4.4-rc - 2018-07-09
6229 Tor 0.3.4.4-rc fixes several small compilation, portability, and
6230 correctness issues in previous versions of Tor. This version is a
6231 release candidate: if no serious bugs are found, we expect that the
6232 stable 0.3.4 release will be (almost) the same as this release.
6234 o Minor features (compilation):
6235 - When building Tor, prefer to use Python 3 over Python 2, and more
6236 recent (contemplated) versions over older ones. Closes
6239 o Minor features (geoip):
6240 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
6241 Country database. Closes ticket 26674.
6243 o Minor features (Rust, portability):
6244 - Rust cross-compilation is now supported. Closes ticket 25895.
6246 o Minor bugfixes (compilation):
6247 - Fix a compilation warning on some versions of GCC when building
6248 code that calls routerinfo_get_my_routerinfo() twice, assuming
6249 that the second call will succeed if the first one did. Fixes bug
6250 26269; bugfix on 0.2.8.2-alpha.
6252 o Minor bugfixes (control port):
6253 - Report the port correctly when a port is configured to bind to
6254 "auto". Fixes bug 26568; bugfix on 0.3.4.1-alpha.
6255 - Handle the HSADDRESS= argument to the HSPOST command properly.
6256 (Previously, this argument was misparsed and thus ignored.) Fixes
6257 bug 26523; bugfix on 0.3.3.1-alpha. Patch by "akwizgran".
6259 o Minor bugfixes (correctness, flow control):
6260 - Upon receiving a stream-level SENDME cell, verify that our window
6261 has not grown too large. Fixes bug 26214; bugfix on svn
6264 o Minor bugfixes (memory, correctness):
6265 - Fix a number of small memory leaks identified by coverity. Fixes
6266 bug 26467; bugfix on numerous Tor versions.
6268 o Minor bugfixes (testing, compatibility):
6269 - When running the hs_ntor_ref.py test, make sure only to pass
6270 strings (rather than "bytes" objects) to the Python subprocess
6271 module. Python 3 on Windows seems to require this. Fixes bug
6272 26535; bugfix on 0.3.1.1-alpha.
6273 - When running the ntor_ref.py test, make sure only to pass strings
6274 (rather than "bytes" objects) to the Python subprocess module.
6275 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
6279 Changes in version 0.3.3.8 - 2018-07-09
6280 Tor 0.3.3.8 backports several changes from the 0.3.4.x series, including
6281 fixes for a memory leak affecting directory authorities.
6283 o Major bugfixes (directory authority, backport from 0.3.4.3-alpha):
6284 - Stop leaking memory on directory authorities when planning to
6285 vote. This bug was crashing authorities by exhausting their
6286 memory. Fixes bug 26435; bugfix on 0.3.3.6.
6288 o Major bugfixes (rust, testing, backport from 0.3.4.3-alpha):
6289 - Make sure that failing tests in Rust will actually cause the build
6290 to fail: previously, they were ignored. Fixes bug 26258; bugfix
6293 o Minor features (compilation, backport from 0.3.4.4-rc):
6294 - When building Tor, prefer to use Python 3 over Python 2, and more
6295 recent (contemplated) versions over older ones. Closes
6298 o Minor features (geoip):
6299 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
6300 Country database. Closes ticket 26674.
6302 o Minor features (relay, diagnostic, backport from 0.3.4.3-alpha):
6303 - Add several checks to detect whether Tor relays are uploading
6304 their descriptors without specifying why they regenerated them.
6305 Diagnostic for ticket 25686.
6307 o Minor bugfixes (circuit path selection, backport from 0.3.4.1-alpha):
6308 - Don't count path selection failures as circuit build failures.
6309 This change should eliminate cases where Tor blames its guard or
6310 the network for situations like insufficient microdescriptors
6311 and/or overly restrictive torrc settings. Fixes bug 25705; bugfix
6314 o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
6315 - Fix a compilation warning on some versions of GCC when building
6316 code that calls routerinfo_get_my_routerinfo() twice, assuming
6317 that the second call will succeed if the first one did. Fixes bug
6318 26269; bugfix on 0.2.8.2-alpha.
6320 o Minor bugfixes (control port, backport from 0.3.4.4-rc):
6321 - Handle the HSADDRESS= argument to the HSPOST command properly.
6322 (Previously, this argument was misparsed and thus ignored.) Fixes
6323 bug 26523; bugfix on 0.3.3.1-alpha. Patch by "akwizgran".
6325 o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
6326 - Fix a number of small memory leaks identified by coverity. Fixes
6327 bug 26467; bugfix on numerous Tor versions.
6329 o Minor bugfixes (relay, backport from 0.3.4.3-alpha):
6330 - Relays now correctly block attempts to re-extend to the previous
6331 relay by Ed25519 identity. Previously they would warn in this
6332 case, but not actually reject the attempt. Fixes bug 26158; bugfix
6335 o Minor bugfixes (restart-in-process, backport from 0.3.4.1-alpha):
6336 - When shutting down, Tor now clears all the flags in the control.c
6337 module. This should prevent a bug where authentication cookies are
6338 not generated on restart. Fixes bug 25512; bugfix on 0.3.3.1-alpha.
6340 o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
6341 - When running the hs_ntor_ref.py test, make sure only to pass
6342 strings (rather than "bytes" objects) to the Python subprocess
6343 module. Python 3 on Windows seems to require this. Fixes bug
6344 26535; bugfix on 0.3.1.1-alpha.
6345 - When running the ntor_ref.py test, make sure only to pass strings
6346 (rather than "bytes" objects) to the Python subprocess module.
6347 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
6351 Changes in version 0.3.4.3-alpha - 2018-06-26
6352 Tor 0.3.4.3-alpha fixes several bugs in earlier versions, including
6353 one that was causing stability issues on directory authorities.
6355 o Major bugfixes (directory authority):
6356 - Stop leaking memory on directory authorities when planning to
6357 vote. This bug was crashing authorities by exhausting their
6358 memory. Fixes bug 26435; bugfix on 0.3.3.6.
6360 o Major bugfixes (rust, testing):
6361 - Make sure that failing tests in Rust will actually cause the build
6362 to fail: previously, they were ignored. Fixes bug 26258; bugfix
6365 o Minor feature (directory authorities):
6366 - Stop warning about incomplete bw lines before the first complete
6367 bw line has been found, so that additional header lines can be
6368 ignored. Fixes bug 25960; bugfix on 0.2.2.1-alpha
6370 o Minor features (relay, diagnostic):
6371 - Add several checks to detect whether Tor relays are uploading
6372 their descriptors without specifying why they regenerated them.
6373 Diagnostic for ticket 25686.
6375 o Minor features (unit tests):
6376 - Test complete bandwidth measurements files, and test that
6377 incomplete bandwidth lines only give warnings when the end of the
6378 header has not been detected. Fixes bug 25947; bugfix
6381 o Minor bugfixes (compilation):
6382 - Refrain from compiling unit testing related object files when
6383 --disable-unittests is set to configure script. Fixes bug 24891;
6384 bugfix on 0.2.5.1-alpha.
6385 - When linking the libtor_testing.a library, only include the
6386 dirauth object files once. Previously, they were getting added
6387 twice. Fixes bug 26402; bugfix on 0.3.4.1-alpha.
6388 - The --enable-fatal-warnings flag now affects Rust code as well.
6389 Closes ticket 26245.
6391 o Minor bugfixes (onion services):
6392 - Recompute some consensus information after detecting a clock jump,
6393 or after transitioning from a non-live consensus to a live
6394 consensus. We do this to avoid having an outdated state, and
6395 miscalculating the index for next-generation onion services. Fixes
6396 bug 24977; bugfix on 0.3.2.1-alpha.
6398 o Minor bugfixes (relay):
6399 - Relays now correctly block attempts to re-extend to the previous
6400 relay by Ed25519 identity. Previously they would warn in this
6401 case, but not actually reject the attempt. Fixes bug 26158; bugfix
6404 o Minor bugfixes (testing):
6405 - Fix compilation of the doctests in the Rust crypto crate. Fixes
6406 bug 26415; bugfix on 0.3.4.1-alpha.
6407 - Instead of trying to read the geoip configuration files from
6408 within the unit tests, instead create our own ersatz files with
6409 just enough geoip data in the format we expect. Trying to read
6410 from the source directory created problems on Windows with mingw,
6411 where the build system's paths are not the same as the platform's
6412 paths. Fixes bug 25787; bugfix on 0.3.4.1-alpha.
6413 - Refrain from trying to get an item from an empty smartlist in
6414 test_bridges_clear_bridge_list. Set DEBUG_SMARTLIST in unit tests
6415 to catch improper smartlist usage. Furthermore, enable
6416 DEBUG_SMARTLIST globally when build is configured with fragile
6417 hardening. Fixes bug 26196; bugfix on 0.3.4.1-alpha.
6420 Changes in version 0.3.3.7 - 2018-06-12
6421 Tor 0.3.3.7 backports several changes from the 0.3.4.x series, including
6422 fixes for bugs affecting compatibility and stability.
6424 o Directory authority changes:
6425 - Add an IPv6 address for the "dannenberg" directory authority.
6426 Closes ticket 26343.
6428 o Minor features (geoip):
6429 - Update geoip and geoip6 to the June 7 2018 Maxmind GeoLite2
6430 Country database. Closes ticket 26351.
6432 o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
6433 - Work around a change in OpenSSL 1.1.1 where return values that
6434 would previously indicate "no password" now indicate an empty
6435 password. Without this workaround, Tor instances running with
6436 OpenSSL 1.1.1 would accept descriptors that other Tor instances
6437 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
6439 o Minor bugfixes (compilation, backport from 0.3.4.2-alpha):
6440 - Silence unused-const-variable warnings in zstd.h with some GCC
6441 versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
6443 o Minor bugfixes (controller, backport from 0.3.4.2-alpha):
6444 - Improve accuracy of the BUILDTIMEOUT_SET control port event's
6445 TIMEOUT_RATE and CLOSE_RATE fields. (We were previously
6446 miscounting the total number of circuits for these field values.)
6447 Fixes bug 26121; bugfix on 0.3.3.1-alpha.
6449 o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
6450 - Prevent a possible out-of-bounds smartlist read in
6451 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
6453 o Minor bugfixes (path selection, backport from 0.3.4.1-alpha):
6454 - Only select relays when they have the descriptors we prefer to use
6455 for them. This change fixes a bug where we could select a relay
6456 because it had _some_ descriptor, but reject it later with a
6457 nonfatal assertion error because it didn't have the exact one we
6458 wanted. Fixes bugs 25691 and 25692; bugfix on 0.3.3.4-alpha.
6461 Changes in version 0.3.4.2-alpha - 2018-06-12
6462 Tor 0.3.4.2-alpha fixes several minor bugs in the previous alpha
6463 release, and forward-ports an authority-only security fix from 0.3.3.6.
6465 o Directory authority changes:
6466 - Add an IPv6 address for the "dannenberg" directory authority.
6467 Closes ticket 26343.
6469 o Major bugfixes (security, directory authority, denial-of-service, also in 0.3.3.6):
6470 - Fix a bug that could have allowed an attacker to force a directory
6471 authority to use up all its RAM by passing it a maliciously
6472 crafted protocol versions string. Fixes bug 25517; bugfix on
6473 0.2.9.4-alpha. This issue is also tracked as TROVE-2018-005.
6475 o Minor features (continuous integration):
6476 - Add the necessary configuration files for continuous integration
6477 testing on Windows, via the Appveyor platform. Closes ticket
6478 25549. Patches from Marcin Cieślak and Isis Lovecruft.
6480 o Minor features (geoip):
6481 - Update geoip and geoip6 to the June 7 2018 Maxmind GeoLite2
6482 Country database. Closes ticket 26351.
6484 o Minor bugfixes (compatibility, openssl):
6485 - Work around a change in OpenSSL 1.1.1 where return values that
6486 would previously indicate "no password" now indicate an empty
6487 password. Without this workaround, Tor instances running with
6488 OpenSSL 1.1.1 would accept descriptors that other Tor instances
6489 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
6491 o Minor bugfixes (compilation):
6492 - Silence unused-const-variable warnings in zstd.h with some GCC
6493 versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
6494 - Fix compilation when using OpenSSL 1.1.0 with the "no-deprecated"
6495 flag enabled. Fixes bug 26156; bugfix on 0.3.4.1-alpha.
6496 - Avoid a compiler warning when casting the return value of
6497 smartlist_len() to double with DEBUG_SMARTLIST enabled. Fixes bug
6498 26283; bugfix on 0.2.4.10-alpha.
6500 o Minor bugfixes (control port):
6501 - Do not count 0-length RELAY_COMMAND_DATA cells as valid data in
6502 CIRC_BW events. Previously, such cells were counted entirely in
6503 the OVERHEAD field. Now they are not. Fixes bug 26259; bugfix
6506 o Minor bugfixes (controller):
6507 - Improve accuracy of the BUILDTIMEOUT_SET control port event's
6508 TIMEOUT_RATE and CLOSE_RATE fields. (We were previously
6509 miscounting the total number of circuits for these field values.)
6510 Fixes bug 26121; bugfix on 0.3.3.1-alpha.
6512 o Minor bugfixes (hardening):
6513 - Prevent a possible out-of-bounds smartlist read in
6514 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
6516 o Minor bugfixes (onion services):
6517 - Fix a bug that blocked the creation of ephemeral v3 onion
6518 services. Fixes bug 25939; bugfix on 0.3.4.1-alpha.
6520 o Minor bugfixes (test coverage tools):
6521 - Update our "cov-diff" script to handle output from the latest
6522 version of gcov, and to remove extraneous timestamp information
6523 from its output. Fixes bugs 26101 and 26102; bugfix
6527 Changes in version 0.3.3.6 - 2018-05-22
6528 Tor 0.3.3.6 is the first stable release in the 0.3.3 series. It
6529 backports several important fixes from the 0.3.4.1-alpha.
6531 The Tor 0.3.3 series includes controller support and other
6532 improvements for v3 onion services, official support for embedding Tor
6533 within other applications, and our first non-trivial module written in
6534 the Rust programming language. (Rust is still not enabled by default
6535 when building Tor.) And as usual, there are numerous other smaller
6536 bugfixes, features, and improvements.
6538 Below are the changes since 0.3.3.5-rc. For a list of all changes
6539 since 0.3.2.10, see the ReleaseNotes file.
6541 o Major bugfixes (directory authorities, security, backport from 0.3.4.1-alpha):
6542 - When directory authorities read a zero-byte bandwidth file, they
6543 would previously log a warning with the contents of an
6544 uninitialised buffer. They now log a warning about the empty file
6545 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
6547 o Major bugfixes (security, directory authority, denial-of-service):
6548 - Fix a bug that could have allowed an attacker to force a directory
6549 authority to use up all its RAM by passing it a maliciously
6550 crafted protocol versions string. Fixes bug 25517; bugfix on
6551 0.2.9.4-alpha. This issue is also tracked as TROVE-2018-005.
6553 o Major bugfixes (crash, backport from 0.3.4.1-alpha):
6554 - Avoid a rare assertion failure in the circuit build timeout code
6555 if we fail to allow any circuits to actually complete. Fixes bug
6556 25733; bugfix on 0.2.2.2-alpha.
6558 o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
6559 - Avoid a crash when testing router reachability on a router that
6560 could have an ed25519 ID, but which does not. Fixes bug 25415;
6561 bugfix on 0.3.3.2-alpha.
6563 o Major bugfixes (onion service, backport from 0.3.4.1-alpha):
6564 - Correctly detect when onion services get disabled after HUP. Fixes
6565 bug 25761; bugfix on 0.3.2.1.
6567 o Major bugfixes (relay, denial of service, backport from 0.3.4.1-alpha):
6568 - Impose a limit on circuit cell queue size. The limit can be
6569 controlled by a consensus parameter. Fixes bug 25226; bugfix
6572 o Minor features (compatibility, backport from 0.3.4.1-alpha):
6573 - Avoid some compilation warnings with recent versions of LibreSSL.
6574 Closes ticket 26006.
6576 o Minor features (continuous integration, backport from 0.3.4.1-alpha):
6577 - Our .travis.yml configuration now includes support for testing the
6578 results of "make distcheck". (It's not uncommon for "make check"
6579 to pass but "make distcheck" to fail.) Closes ticket 25814.
6580 - Our Travis CI configuration now integrates with the Coveralls
6581 coverage analysis tool. Closes ticket 25818.
6583 o Minor features (geoip):
6584 - Update geoip and geoip6 to the May 1 2018 Maxmind GeoLite2 Country
6585 database. Closes ticket 26104.
6587 o Minor bugfixes (client, backport from 0.3.4.1-alpha):
6588 - Don't consider Tor running as a client if the ControlPort is open,
6589 but no actual client ports are open. Fixes bug 26062; bugfix
6592 o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
6593 - Upon receiving a malformed connected cell, stop processing the
6594 cell immediately. Previously we would mark the connection for
6595 close, but continue processing the cell as if the connection were
6596 open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
6598 o Minor bugfixes (documentation, backport from 0.3.4.1-alpha):
6599 - Stop saying in the manual that clients cache ipv4 dns answers from
6600 exit relays. We haven't used them since 0.2.6.3-alpha, and in
6601 ticket 24050 we stopped even caching them as of 0.3.2.6-alpha, but
6602 we forgot to say so in the man page. Fixes bug 26052; bugfix
6605 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
6606 - Allow the nanosleep() system call, which glibc uses to implement
6607 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
6609 o Minor bugfixes (onion service, backport from 0.3.4.1-alpha):
6610 - Fix a memory leak when a v3 onion service is configured and gets a
6611 SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
6612 - When parsing the descriptor signature, look for the token plus an
6613 extra white-space at the end. This is more correct but also will
6614 allow us to support new fields that might start with "signature".
6615 Fixes bug 26069; bugfix on 0.3.0.1-alpha.
6617 o Minor bugfixes (relay, crash, backport from 0.3.4.1-alpha):
6618 - Avoid a crash when running with DirPort set but ORPort turned off.
6619 Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
6621 o Documentation (backport from 0.3.4.1-alpha):
6622 - Correct an IPv6 error in the documentation for ExitPolicy. Closes
6623 ticket 25857. Patch from "CTassisF".
6626 Changes in version 0.3.4.1-alpha - 2018-05-17
6627 Tor 0.3.4.1-alpha is the first release in the 0.3.4.x series. It
6628 includes refactoring to begin reducing Tor's binary size and idle CPU
6629 usage on mobile, along with prep work for new bandwidth scanners,
6630 improvements to the experimental "vanguards" feature, and numerous
6631 other small features and bugfixes.
6633 o New system requirements:
6634 - Tor no longer tries to support old operating systems without
6635 mmap() or some local equivalent. Apparently, compilation on such
6636 systems has been broken for some time, without anybody noticing or
6637 complaining. Closes ticket 25398.
6639 o Major feature (directory authority, modularization):
6640 - The directory authority subsystem has been modularized. The code
6641 is now located in src/or/dirauth/, and is compiled in by default.
6642 To disable the module, the configure option
6643 --disable-module-dirauth has been added. This module may be
6644 disabled by default in some future release. Closes ticket 25610.
6646 o Major features (main loop, CPU usage):
6647 - When Tor is disabled (via DisableNetwork or via hibernation), it
6648 no longer needs to run any per-second events. This change should
6649 make it easier for mobile applications to disable Tor while the
6650 device is sleeping, or Tor is not running. Closes ticket 26063.
6651 - Tor no longer enables all of its periodic events by default.
6652 Previously, Tor would enable all possible main loop events,
6653 regardless of whether it needed them. Furthermore, many of these
6654 events are now disabled with Tor is hibernating or DisableNetwork
6655 is set. This is a big step towards reducing client CPU usage by
6656 reducing the amount of wake-ups the daemon does. Closes ticket
6658 - The bandwidth-limitation logic has been refactored so that
6659 bandwidth calculations are performed on-demand, rather than every
6660 TokenBucketRefillInterval milliseconds. This change should improve
6661 the granularity of our bandwidth calculations, and limit the
6662 number of times that the Tor process needs to wake up when it is
6663 idle. Closes ticket 25373.
6664 - Move responsibility for many operations from a once-per-second
6665 callback to a callback that is only scheduled as needed. Moving
6666 this functionality has allowed us to disable the callback when
6667 Tor's network is disabled. Once enough items are removed from our
6668 once-per-second callback, we can eliminate it entirely to conserve
6669 CPU when idle. The functionality removed includes: closing
6670 connections, circuits, and channels (ticket 25932); consensus
6671 voting (25937); flushing log callbacks (25951); honoring delayed
6672 SIGNEWNYM requests (25949); rescanning the consensus cache
6673 (25931); saving the state file to disk (25948); warning relay
6674 operators about unreachable ports (25952); and keeping track of
6675 Tor's uptime (26009).
6677 o Major bugfixes (directory authorities, security):
6678 - When directory authorities read a zero-byte bandwidth file, they
6679 would previously log a warning with the contents of an
6680 uninitialised buffer. They now log a warning about the empty file
6681 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
6683 o Major bugfixes (crash):
6684 - Avoid a rare assertion failure in the circuit build timeout code
6685 if we fail to allow any circuits to actually complete. Fixes bug
6686 25733; bugfix on 0.2.2.2-alpha.
6688 o Major bugfixes (directory authority):
6689 - Avoid a crash when testing router reachability on a router that
6690 could have an ed25519 ID, but which does not. Fixes bug 25415;
6691 bugfix on 0.3.3.2-alpha.
6693 o Major bugfixes (onion service):
6694 - Correctly detect when onion services get disabled after HUP. Fixes
6695 bug 25761; bugfix on 0.3.2.1.
6697 o Major bugfixes (protover, voting):
6698 - Revise Rust implementation of protover to use a more memory-
6699 efficient voting algorithm and corresponding data structures, thus
6700 avoiding a potential (but small impact) DoS attack where specially
6701 crafted protocol strings would expand to several potential
6702 megabytes in memory. In the process, several portions of code were
6703 revised to be methods on new, custom types, rather than functions
6704 taking interchangeable types, thus increasing type safety of the
6705 module. Custom error types and handling were added as well, in
6706 order to facilitate better error dismissal/handling in outside
6707 crates and avoid mistakenly passing an internal error string to C
6708 over the FFI boundary. Many tests were added, and some previous
6709 differences between the C and Rust implementations have been
6710 remedied. Fixes bug 24031; bugfix on 0.3.3.1-alpha.
6712 o Major bugfixes (relay, denial of service):
6713 - Impose a limit on circuit cell queue size. The limit can be
6714 controlled by a consensus parameter. Fixes bug 25226; bugfix
6717 o Minor features (accounting):
6718 - When Tor becomes dormant, it now uses a scheduled event to wake up
6719 at the right time. Previously, we would use the per-second timer
6720 to check whether to wake up, but we no longer have any per-second
6721 timers enabled when the network is disabled. Closes ticket 26064.
6723 o Minor features (code quality):
6724 - Add optional spell-checking for the Tor codebase, using the
6725 "misspell" program. To use this feature, run "make check-typos".
6726 Closes ticket 25024.
6728 o Minor features (compatibility):
6729 - Tor now detects versions of OpenSSL 1.1.0 and later compiled with
6730 the no-deprecated option, and builds correctly with them. Closes
6731 tickets 19429, 19981, and 25353.
6732 - Avoid some compilation warnings with recent versions of LibreSSL.
6733 Closes ticket 26006.
6735 o Minor features (compression, zstd):
6736 - When running with zstd, Tor now considers using advanced functions
6737 that the zstd maintainers have labeled as potentially unstable. To
6738 prevent breakage, Tor will only use this functionality when the
6739 runtime version of the zstd library matches the version with which
6740 Tor was compiled. Closes ticket 25162.
6742 o Minor features (configuration):
6743 - The "DownloadSchedule" options have been renamed to end with
6744 "DownloadInitialDelay". The old names are still allowed, but will
6745 produce a warning. Comma-separated lists are still permitted for
6746 these options, but all values after the first are ignored (as they
6747 have been since 0.2.9). Closes ticket 23354.
6749 o Minor features (continuous integration):
6750 - Our .travis.yml configuration now includes support for testing the
6751 results of "make distcheck". (It's not uncommon for "make check"
6752 to pass but "make distcheck" to fail.) Closes ticket 25814.
6753 - Our Travis CI configuration now integrates with the Coveralls
6754 coverage analysis tool. Closes ticket 25818.
6756 o Minor features (control port):
6757 - Introduce GETINFO "current-time/{local,utc}" to return the local
6758 and UTC times respectively in ISO format. This helps a controller
6759 like Tor Browser detect a time-related error. Closes ticket 25511.
6760 Patch by Neel Chauhan.
6761 - Introduce new fields to the CIRC_BW event. There are two new
6762 fields in each of the read and written directions. The DELIVERED
6763 fields report the total valid data on the circuit, as measured by
6764 the payload sizes of verified and error-checked relay command
6765 cells. The OVERHEAD fields report the total unused bytes in each
6766 of these cells. Closes ticket 25903.
6768 o Minor features (directory authority):
6769 - Directory authorities now open their key-pinning files as O_SYNC,
6770 to limit their chances of accidentally writing partial lines.
6771 Closes ticket 23909.
6773 o Minor features (directory authority, forward compatibility):
6774 - Make the lines of the measured bandwidth file able to contain
6775 their entries in any order. Previously, the node_id entry needed
6776 to come first. Closes ticket 26004.
6778 o Minor features (entry guards):
6779 - Introduce a new torrc option NumPrimaryGuards for controlling the
6780 number of primary guards. Closes ticket 25843.
6782 o Minor features (geoip):
6783 - Update geoip and geoip6 to the May 1 2018 Maxmind GeoLite2 Country
6784 database. Closes ticket 26104.
6786 o Minor features (performance):
6787 - Avoid a needless call to malloc() when processing an incoming
6788 relay cell. Closes ticket 24914.
6789 - Make our timing-wheel code run a tiny bit faster on 32-bit
6790 platforms, by preferring 32-bit math to 64-bit. Closes
6792 - Avoid a needless malloc()/free() pair every time we handle an ntor
6793 handshake. Closes ticket 25150.
6795 o Minor features (testing):
6796 - Add a unit test for voting_schedule_get_start_of_next_interval().
6797 Closes ticket 26014, and helps make unit test coverage
6799 - A new unittests module specifically for testing the functions in
6800 the (new-ish) bridges.c module has been created with new
6801 unittests, raising the code coverage percentages. Closes 25425.
6802 - We now have improved testing for addressmap_get_virtual_address()
6803 function. This should improve our test coverage, and make our test
6804 coverage more deterministic. Closes ticket 25993.
6806 o Minor features (timekeeping, circuit scheduling):
6807 - When keeping track of how busy each circuit have been recently on
6808 a given connection, use coarse-grained monotonic timers rather
6809 than gettimeofday(). This change should marginally increase
6810 accuracy and performance. Implements part of ticket 25927.
6812 o Minor bugfixes (bandwidth management):
6813 - Consider ourselves "low on write bandwidth" if we have exhausted
6814 our write bandwidth some time in the last second. This was the
6815 documented behavior before, but the actual behavior was to change
6816 this value every TokenBucketRefillInterval. Fixes bug 25828;
6817 bugfix on 0.2.3.5-alpha.
6819 o Minor bugfixes (C correctness):
6820 - Add a missing lock acquisition in the shutdown code of the control
6821 subsystem. Fixes bug 25675; bugfix on 0.2.7.3-rc. Found by
6822 Coverity; this is CID 1433643.
6824 o Minor bugfixes (circuit path selection):
6825 - Don't count path selection failures as circuit build failures.
6826 This change should eliminate cases where Tor blames its guard or
6827 the network for situations like insufficient microdescriptors
6828 and/or overly restrictive torrc settings. Fixes bug 25705; bugfix
6831 o Minor bugfixes (client):
6832 - Don't consider Tor running as a client if the ControlPort is open,
6833 but no actual client ports are open. Fixes bug 26062; bugfix
6836 o Minor bugfixes (code style):
6837 - Fixed multiple includes of transports.h in src/or/connection.c
6838 Fixes bug 25261; bugfix on 0.2.5.1-alpha.
6839 - Remove the unused variable n_possible from the function
6840 channel_get_for_extend(). Fixes bug 25645; bugfix on 0.2.4.4-alpha
6842 o Minor bugfixes (control interface):
6843 - Respond with more human-readable error messages to GETINFO exit-
6844 policy/* requests. Also, let controller know if an error is
6845 transient (response code 551) or not (response code 552). Fixes
6846 bug 25852; bugfix on 0.2.8.1-alpha.
6848 o Minor bugfixes (controller):
6849 - Make CIRC_BW event reflect the total of all data sent on a
6850 circuit, including padding and dropped cells. Also fix a mis-
6851 counting bug when STREAM_BW events were enabled. Fixes bug 25400;
6852 bugfix on 0.2.5.2-alpha.
6854 o Minor bugfixes (correctness, client):
6855 - Upon receiving a malformed connected cell, stop processing the cell
6856 immediately. Previously we would mark the connection for close, but
6857 continue processing the cell as if the connection were open. Fixes bug
6858 26072; bugfix on 0.2.4.7-alpha.
6860 o Minor bugfixes (directory client):
6861 - When unverified-consensus is verified, rename it to cached-
6862 consenus. Fixes bug 4187; bugfix on 0.2.0.3-alpha.
6863 - Fixed launching a certificate fetch always during the scheduled
6864 periodic consensus fetch by fetching only in those cases when
6865 consensus are waiting for certs. Fixes bug 24740; bugfix
6868 o Minor bugfixes (documentation):
6869 - Stop saying in the manual that clients cache ipv4 dns answers from
6870 exit relays. We haven't used them since 0.2.6.3-alpha, and in
6871 ticket 24050 we stopped even caching them as of 0.3.2.6-alpha, but
6872 we forgot to say so in the man page. Fixes bug 26052; bugfix
6875 o Minor bugfixes (error reporting):
6876 - Improve tolerance for directory authorities with skewed clocks.
6877 Previously, an authority with a clock more than 60 seconds ahead
6878 could cause a client with a correct clock to warn that the
6879 client's clock was behind. Now the clocks of a majority of
6880 directory authorities have to be ahead of the client before this
6881 warning will occur. Fixes bug 25756; bugfix on 0.2.2.25-alpha.
6883 o Minor bugfixes (Linux seccomp2 sandbox):
6884 - Allow the nanosleep() system call, which glibc uses to implement
6885 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
6887 o Minor bugfixes (onion service):
6888 - Fix a memory leak when a v3 onion service is configured and gets a
6889 SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
6890 - When parsing the descriptor signature, look for the token plus an
6891 extra white-space at the end. This is more correct but also will
6892 allow us to support new fields that might start with "signature".
6893 Fixes bug 26069; bugfix on 0.3.0.1-alpha.
6895 o Minor bugfixes (path selection):
6896 - Only select relays when they have the descriptors we prefer to use
6897 for them. This change fixes a bug where we could select a relay
6898 because it had _some_ descriptor, but reject it later with a
6899 nonfatal assertion error because it didn't have the exact one we
6900 wanted. Fixes bugs 25691 and 25692; bugfix on 0.3.3.4-alpha.
6902 o Minor bugfixes (portability):
6903 - Do not align mmap length, as it is not required by POSIX, and the
6904 getpagesize function is deprecated. Fixes bug 25399; bugfix
6907 o Minor bugfixes (portability, FreeBSD):
6908 - In have_enough_mem_for_dircache(), the variable DIRCACHE_MIN_MEM_MB
6909 does not stringify on FreeBSD, so we switch to tor_asprintf().
6910 Fixes bug 20887; bugfix on 0.2.8.1-alpha. Patch by Neel Chauhan.
6912 o Minor bugfixes (relay statistics):
6913 - When a relay is collecting internal statistics about how many
6914 create cell requests it has seen of each type, accurately count
6915 the requests from relays that temporarily fall out of the
6916 consensus. (To be extra conservative, we were already ignoring
6917 requests from clients in our counts, and we continue ignoring them
6918 here.) Fixes bug 24910; bugfix on 0.2.4.17-rc.
6920 o Minor bugfixes (relay, crash):
6921 - Avoid a crash when running with DirPort set but ORPort turned off.
6922 Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
6924 o Minor bugfixes (restart-in-process):
6925 - When shutting down, Tor now clears all the flags in the control.c
6926 module. This should prevent a bug where authentication cookies are
6927 not generated on restart. Fixes bug 25512; bugfix on 0.3.3.1-alpha.
6929 o Minor bugfixes (testing):
6930 - When testing workqueue event-cancellation, make sure that we
6931 actually cancel an event, and that cancel each event with equal
6932 probability. (It was previously possible, though extremely
6933 unlikely, for our event-canceling test not to cancel any events.)
6934 Fixes bug 26008; bugfix on 0.2.6.3-alpha.
6935 - Repeat part of the test in test_client_pick_intro() a number of
6936 times, to give it consistent coverage. Fixes bug 25996; bugfix
6938 - Remove randomness from the hs_common/responsible_hsdirs test, so
6939 that it always takes the same path through the function it tests.
6940 Fixes bug 25997; bugfix on 0.3.2.1-alpha.
6941 - Change the behavior of the "channel/outbound" test so that it
6942 never causes a 10-second rollover for the EWMA circuitmux code.
6943 Previously, this behavior would happen randomly, and result in
6944 fluctuating test coverage. Fixes bug 25994; bugfix
6946 - Use X509_new() to allocate certificates that will be freed later
6947 with X509_free(). Previously, some parts of the unit tests had
6948 used tor_malloc_zero(), which is incorrect, and which caused test
6949 failures on Windows when they were built with extra hardening.
6950 Fixes bugs 25943 and 25944; bugfix on 0.2.8.1-alpha. Patch by
6952 - While running the circuit_timeout test, fix the PRNG to a
6953 deterministic AES stream, so that the test coverage from this test
6954 will itself be deterministic. Fixes bug 25995; bugfix
6957 o Minor bugfixes (vanguards):
6958 - Allow the last hop in a vanguard circuit to be the same as our
6959 first, to prevent the adversary from influencing guard node choice
6960 by choice of last hop. Also prevent the creation of A - B - A
6961 paths, or A - A paths, which are forbidden by relays. Fixes bug
6962 25870; bugfix on 0.3.3.1-alpha.
6964 o Code simplification and refactoring:
6965 - Remove duplicate code in parse_{c,s}method_line and bootstrap
6966 their functionalities into a single function. Fixes bug 6236;
6967 bugfix on 0.2.3.6-alpha.
6968 - We remove the PortForwarding and PortForwardingHelper options,
6969 related functions, and the port_forwarding tests. These options
6970 were used by the now-deprecated Vidalia to help ordinary users
6971 become Tor relays or bridges. Closes ticket 25409. Patch by
6973 - In order to make the OR and dir checking function in router.c less
6974 confusing we renamed some functions and
6975 consider_testing_reachability() has been split into
6976 router_should_check_reachability() and
6977 router_do_reachability_checks(). Also we improved the documentation
6978 in some functions. Closes ticket 18918.
6979 - Initial work to isolate Libevent usage to a handful of modules in
6980 our codebase, to simplify our call structure, and so that we can
6981 more easily change event loops in the future if needed. Closes
6983 - Introduce a function to call getsockname() and return tor_addr_t,
6984 to save a little complexity throughout the codebase. Closes
6986 - Make hsdir_index in node_t a hsdir_index_t rather than a pointer
6987 as hsdir_index is always present. Also, we move hsdir_index_t into
6988 or.h. Closes ticket 23094. Patch by Neel Chauhan.
6989 - Merge functions used for describing nodes and suppress the
6990 functions that do not allocate memory for the output buffer
6991 string. NODE_DESC_BUF_LEN constant and format_node_description()
6992 function cannot be used externally from router.c module anymore.
6993 Closes ticket 25432. Patch by valentecaio.
6994 - Our main loop has been simplified so that all important operations
6995 happen inside events. Previously, some operations had to happen
6996 outside the event loop, to prevent infinite sequences of event
6997 activations. Closes ticket 25374.
6998 - Put a SHA1 public key digest in hs_service_intro_point_t, and use
6999 it in register_intro_circ() and service_intro_point_new(). This
7000 prevents the digest from being re-calculated each time. Closes
7001 ticket 23107. Patch by Neel Chauhan.
7002 - Refactor token-bucket implementations to use a common backend.
7003 Closes ticket 25766.
7004 - Remove extern declaration of stats_n_seconds_working variable from
7005 main, protecting its accesses with get_uptime() and reset_uptime()
7006 functions. Closes ticket 25081, patch by “valentecaio”.
7007 - Remove our previous logic for "cached gettimeofday()" -- our
7008 coarse monotonic timers are fast enough for this purpose, and far
7009 less error-prone. Implements part of ticket 25927.
7010 - Remove the return value for fascist_firewall_choose_address_base(),
7011 and sister functions such as fascist_firewall_choose_address_node()
7012 and fascist_firewall_choose_address_rs(). Also, while we're here,
7013 initialize the ap argument as leaving it uninitialized can pose a
7014 security hazard. Closes ticket 24734. Patch by Neel Chauhan.
7015 - Rename two fields of connection_t struct. timestamp_lastwritten is
7016 renamed to timestamp_last_write_allowed and timestamp_lastread is
7017 renamed to timestamp_last_read_allowed. Closes ticket 24714, patch
7019 - Since Tor requires C99, remove our old workaround code for libc
7020 implementations where free(NULL) doesn't work. Closes ticket 24484.
7021 - Use our standard rate-limiting code to deal with excessive
7022 libevent failures, rather than the hand-rolled logic we had
7023 before. Closes ticket 26016.
7024 - We remove the return value of node_get_prim_orport() and
7025 node_get_prim_dirport(), and introduce node_get_prim_orport() in
7026 node_ipv6_or_preferred() and node_ipv6_dir_preferred() in order to
7027 check for a null address. Closes ticket 23873. Patch by
7029 - We switch to should_record_bridge_info() in
7030 geoip_note_client_seen() and options_need_geoip_info() instead of
7031 accessing the configuration values directly. Fixes bug 25290;
7032 bugfix on 0.2.1.6-alpha. Patch by Neel Chauhan.
7034 o Deprecated features:
7035 - As we are not recommending 0.2.5 anymore, we require relays that
7036 once had an ed25519 key associated with their RSA key to always
7037 have that key, instead of allowing them to drop back to a version
7038 that didn't support ed25519. This means they need to use a new RSA
7039 key if they want to downgrade to an older version of tor without
7040 ed25519. Closes ticket 20522.
7043 - Correct an IPv6 error in the documentation for ExitPolicy. Closes
7044 ticket 25857. Patch from "CTassisF".
7047 - Directory authorities will no longer support voting according to
7048 any consensus method before consensus method 25. This keeps
7049 authorities compatible with all authorities running 0.2.9.8 and
7050 later, and does not break any clients or relays. Implements ticket
7051 24378 and proposal 290.
7052 - The PortForwarding and PortForwardingHelper features have been
7053 removed. The reasoning is, given that implementations of NAT
7054 traversal protocols within common consumer grade routers are
7055 frequently buggy, and that the target audience for a NAT punching
7056 feature is a perhaps less-technically-inclined relay operator,
7057 when the helper fails to setup traversal the problems are usually
7058 deep, ugly, and very router specific, making them horrendously
7059 impossible for technical support to reliable assist with, and thus
7060 resulting in frustration all around. Unfortunately, relay
7061 operators who would like to run relays behind NATs will need to
7062 become more familiar with the port forwarding configurations on
7063 their local router. Closes 25409.
7064 - The TestingEnableTbEmptyEvent option has been removed. It was used
7065 in testing simulations to measure how often connection buckets
7066 were emptied, in order to improve our scheduling, but it has not
7067 been actively used in years. Closes ticket 25760.
7068 - The old "round-robin" circuit multiplexer (circuitmux)
7069 implementation has been removed, along with a fairly large set of
7070 code that existed to support it. It has not been the default
7071 circuitmux since we introduced the "EWMA" circuitmux in 0.2.4.x,
7072 but it still required an unreasonable amount of memory and CPU.
7073 Closes ticket 25268.
7076 Changes in version 0.3.3.5-rc - 2018-04-15
7077 Tor 0.3.3.5-rc fixes various bugs in earlier versions of Tor,
7078 including some that could affect reliability or correctness.
7080 This is the first release candidate in the 0.3.3 series. If we find no
7081 new bugs or regression here, then the first stable 0.3.3 release will
7082 be nearly identical to this one.
7084 o Major bugfixes (security, protover, voting):
7085 - Revise Rust implementation of protover to use a more memory-
7086 efficient voting algorithm and corresponding data structures, thus
7087 avoiding a potential memory-based DoS attack where specially
7088 crafted protocol strings would expand to fill available memory.
7089 Fixes bug 24031; bugfix on 0.3.3.1-alpha.
7091 o Major bugfixes (performance, load balancing):
7092 - Directory authorities no longer vote in favor of the Guard flag
7093 for relays without directory support. Starting in Tor
7094 0.3.0.1-alpha, clients have been avoiding using such relays in the
7095 Guard position, leading to increasingly broken load balancing for
7096 the 5%-or-so of Guards that don't advertise directory support.
7097 Fixes bug 22310; bugfix on 0.3.0.6.
7099 o Minor feature (continuous integration):
7100 - Update the Travis CI configuration to use the stable Rust channel,
7101 now that we have decided to require that. Closes ticket 25714.
7103 o Minor features (config options):
7104 - Change the way the default value for MaxMemInQueues is calculated.
7105 We now use 40% of the hardware RAM if the system has 8 GB RAM or
7106 more. Otherwise we use the former value of 75%. Closes
7109 o Minor features (geoip):
7110 - Update geoip and geoip6 to the April 3 2018 Maxmind GeoLite2
7111 Country database. Closes ticket 25718.
7113 o Minor bugfixes (client):
7114 - When using a listed relay as a bridge, and also using
7115 microdescriptors, and considering that relay as a non-bridge in a
7116 circuit, treat its microdescriptor as a valid source of
7117 information about that relay. This change should prevent a non-
7118 fatal assertion error. Fixes bug 25691; bugfix on 0.3.3.4-alpha.
7120 o Minor bugfixes (controller):
7121 - Restore the correct operation of the RESOLVE command, which had
7122 been broken since we added the ability to enable/disable DNS on
7123 specific listener ports. Fixes bug 25617; bugfix on 0.2.9.3-alpha.
7125 o Minor bugfixes (distribution, compilation, rust):
7126 - Build correctly when the rust dependencies submodule is loaded,
7127 but the TOR_RUST_DEPENDENCIES environment variable is not set.
7128 Fixes bug 25679; bugfix on 0.3.3.1-alpha.
7129 - Actually include all of our Rust source in our source
7130 distributions. (Previously, a few of the files were accidentally
7131 omitted.) Fixes bug 25732; bugfix on 0.3.3.2-alpha.
7133 o Minor bugfixes (documentation):
7134 - Document that the PerConnBW{Rate,Burst} options will fall back to
7135 their corresponding consensus parameters only if those parameters
7136 are set. Previously we had claimed that these values would always
7137 be set in the consensus. Fixes bug 25296; bugfix on 0.2.2.7-alpha.
7138 - Revert a misformatting issue in the ExitPolicy documentation.
7139 Fixes bug 25582; bugfix on 0.3.3.1-alpha.
7141 o Minor bugfixes (exit relay DNS retries):
7142 - Re-attempt timed-out DNS queries 3 times before failure, since our
7143 timeout is 5 seconds for them, but clients wait 10-15. Also allow
7144 slightly more timeouts per resolver when an exit has multiple
7145 resolvers configured. Fixes bug 21394; bugfix on 0.3.1.9.
7147 o Minor bugfixes (onion services):
7148 - Re-instate counting the client HSDir fetch circuits against the
7149 MaxClientCircuitsPending rate limit. Fixes bug 24989; bugfix
7151 - Remove underscores from the _HSLayer{2,3}Nodes options. This
7152 expert-user configuration can now be enabled as HSLayer{2,3}Nodes.
7153 Fixes bug 25581; bugfix on 0.3.3.1-alpha
7155 o Code simplification and refactoring:
7156 - Move the list of default directory authorities to its own file.
7157 Closes ticket 24854. Patch by "beastr0".
7159 o Documentation (manpage, denial of service):
7160 - Provide more detail about the denial-of-service options, by
7161 listing each mitigation and explaining how they relate. Closes
7165 Changes in version 0.3.3.4-alpha - 2018-03-29
7166 Tor 0.3.3.4-alpha includes various bugfixes for issues found during
7167 the alpha testing of earlier releases in its series. We are
7168 approaching a stable 0.3.3.4-alpha release: more testing is welcome!
7170 o New system requirements:
7171 - When built with Rust, Tor now depends on version 0.2.39 of the
7172 libc crate. Closes tickets 25310 and 25664.
7174 o Major bugfixes (relay, connection):
7175 - If we have failed to connect to a relay and received a connection
7176 refused, timeout, or similar error (at the TCP level), do not try
7177 that same address/port again for 60 seconds after the failure has
7178 occurred. Fixes bug 24767; bugfix on 0.0.6.
7180 o Minor features (geoip):
7181 - Update geoip and geoip6 to the March 8 2018 Maxmind GeoLite2
7182 Country database. Closes ticket 25469.
7184 o Minor features (log messages):
7185 - Improve log message in the out-of-memory handler to include
7186 information about memory usage from the different compression
7187 backends. Closes ticket 25372.
7189 o Minor features (sandbox):
7190 - Explicitly permit the poll() system call when the Linux
7191 seccomp2-based sandbox is enabled: apparently, some versions of
7192 libc use poll() when calling getpwnam(). Closes ticket 25313.
7194 o Minor bugfixes (C correctness):
7195 - Fix a very unlikely (impossible, we believe) null pointer
7196 dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
7197 Coverity; this is CID 1430932.
7199 o Minor bugfixes (channel, client):
7200 - Better identify client connection when reporting to the geoip
7201 client cache. Fixes bug 24904; bugfix on 0.3.1.7.
7203 o Minor bugfixes (compilation):
7204 - Fix a C99 compliance issue in our configuration script that caused
7205 compilation issues when compiling Tor with certain versions of
7206 xtools. Fixes bug 25474; bugfix on 0.3.2.5-alpha.
7208 o Minor bugfixes (controller, reliability):
7209 - Avoid a (nonfatal) assertion failure when extending a one-hop
7210 circuit from the controller to become a multihop circuit. Fixes
7211 bug 24903; bugfix on 0.2.5.2-alpha.
7213 o Major bugfixes (networking):
7214 - Tor will no longer reject IPv6 address strings from Tor Browser
7215 when they are passed as hostnames in SOCKS5 requests. Fixes bug
7216 25036, bugfix on Tor 0.3.1.2.
7218 o Minor bugfixes (networking):
7219 - string_is_valid_hostname() will not consider IP strings to be
7220 valid hostnames. Fixes bug 25055; bugfix on Tor 0.2.5.5.
7222 o Minor bugfixes (onion service v3):
7223 - Avoid an assertion failure when the next onion service
7224 descriptor rotation type is out of sync with the consensus's
7225 valid-after time. Instead, log a warning message with extra
7226 information, so we can better hunt down the cause of this
7227 assertion. Fixes bug 25306; bugfix on 0.3.2.1-alpha.
7229 o Minor bugfixes (testing):
7230 - Avoid intermittent test failures due to a test that had relied on
7231 onion service introduction point creation finishing within 5
7232 seconds of real clock time. Fixes bug 25450; bugfix
7234 - Rust crates are now automatically detected and tested. Previously,
7235 some crates were not tested by `make test-rust` due to a static
7236 string in the `src/test/test_rust.sh` script specifying which
7237 crates to test. Fixes bug 25560; bugfix on 0.3.3.3-alpha.
7239 o Minor bugfixes (testing, benchmarks):
7240 - Fix a crash when running benchmark tests on win32 systems. The
7241 crash was due to a mutex that wasn't initialized before logging
7242 and options were initialized. Fixes bug 25479; bugfix
7245 o Minor bugfixes (warnings, ipv6):
7246 - Avoid a bug warning that could occur when trying to connect to a
7247 relay over IPv6. This warning would occur on a Tor instance that
7248 downloads router descriptors, but prefers to use microdescriptors.
7249 Fixes bug 25213; bugfix on 0.3.3.1-alpha.
7251 o Code simplification and refactoring:
7252 - Remove the old (deterministic) directory retry logic entirely:
7253 We've used exponential backoff exclusively for some time. Closes
7257 - Improved the documentation of AccountingStart parameter. Closes
7259 - Update the documentation for "Log" to include the current list of
7260 logging domains. Closes ticket 25378.
7263 Changes in version 0.3.1.10 - 2018-03-03
7264 Tor 0.3.1.10 backports a number of bugfixes, including important fixes for
7267 It includes an important security fix for a remote crash attack
7268 against directory authorities, tracked as TROVE-2018-001.
7270 This release also backports our new system for improved resistance to
7271 denial-of-service attacks against relays.
7273 This release also fixes several minor bugs and annoyances from
7276 All directory authorities should upgrade to one of the versions
7277 released today. Relays running 0.3.1.x may wish to update to one of
7278 the versions released today, for the DoS mitigations.
7280 Please note: according to our release calendar, Tor 0.3.1 will no
7281 longer be supported after 1 July 2018. If you will be running Tor
7282 after that date, you should make sure to plan to upgrade to the latest
7283 stable version, or downgrade to 0.2.9 (which will receive long-term
7286 o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
7287 - Fix a protocol-list handling bug that could be used to remotely crash
7288 directory authorities with a null-pointer exception. Fixes bug 25074;
7289 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
7292 o Major features (denial-of-service mitigation, backport from 0.3.3.2-alpha):
7293 - Give relays some defenses against the recent network overload. We
7294 start with three defenses (default parameters in parentheses).
7295 First: if a single client address makes too many concurrent
7296 connections (>100), hang up on further connections. Second: if a
7297 single client address makes circuits too quickly (more than 3 per
7298 second, with an allowed burst of 90) while also having too many
7299 connections open (3), refuse new create cells for the next while
7300 (1-2 hours). Third: if a client asks to establish a rendezvous
7301 point to you directly, ignore the request. These defenses can be
7302 manually controlled by new torrc options, but relays will also
7303 take guidance from consensus parameters, so there's no need to
7304 configure anything manually. Implements ticket 24902.
7306 o Minor features (linux seccomp2 sandbox, backport from 0.3.2.5-alpha):
7307 - Update the sandbox rules so that they should now work correctly
7308 with Glibc 2.26. Closes ticket 24315.
7310 o Major bugfixes (onion services, retry behavior, backport from 0.3.3.1-alpha):
7311 - Fix an "off by 2" error in counting rendezvous failures on the
7312 onion service side. While we thought we would stop the rendezvous
7313 attempt after one failed circuit, we were actually making three
7314 circuit attempts before giving up. Now switch to a default of 2,
7315 and allow the consensus parameter "hs_service_max_rdv_failures" to
7316 override. Fixes bug 24895; bugfix on 0.0.6.
7318 o Major bugfixes (protocol versions, backport from 0.3.3.2-alpha):
7319 - Add Link protocol version 5 to the supported protocols list. Fixes
7320 bug 25070; bugfix on 0.3.1.1-alpha.
7322 o Major bugfixes (relay, backport from 0.3.3.1-alpha):
7323 - Fix a set of false positives where relays would consider
7324 connections to other relays as being client-only connections (and
7325 thus e.g. deserving different link padding schemes) if those
7326 relays fell out of the consensus briefly. Now we look only at the
7327 initial handshake and whether the connection authenticated as a
7328 relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
7330 o Minor features (denial-of-service avoidance, backport from 0.3.3.2-alpha):
7331 - Make our OOM handler aware of the geoip client history cache so it
7332 doesn't fill up the memory. This check is important for IPv6 and
7333 our DoS mitigation subsystem. Closes ticket 25122.
7335 o Minor feature (relay statistics, backport from 0.3.2.6-alpha):
7336 - Change relay bandwidth reporting stats interval from 4 hours to 24
7337 hours in order to reduce the efficiency of guard discovery
7338 attacks. Fixes ticket 23856.
7340 o Minor features (compatibility, OpenSSL, backport from 0.3.3.3-alpha):
7341 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
7342 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
7343 since they neither disabled TLS 1.3 nor enabled any of the
7344 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
7345 Closes ticket 24978.
7347 o Minor features (fallback directory mirrors, backport from 0.3.2.9):
7348 - The fallback directory list has been re-generated based on the
7349 current status of the network. Tor uses fallback directories to
7350 bootstrap when it doesn't yet have up-to-date directory
7351 information. Closes ticket 24801.
7352 - Make the default DirAuthorityFallbackRate 0.1, so that clients
7353 prefer to bootstrap from fallback directory mirrors. This is a
7354 follow-up to 24679, which removed weights from the default
7355 fallbacks. Implements ticket 24681.
7357 o Minor features (geoip):
7358 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
7361 o Minor bugfix (channel connection, backport from 0.3.3.2-alpha):
7362 - Use the actual observed address of an incoming relay connection,
7363 not the canonical address of the relay from its descriptor, when
7364 making decisions about how to handle the incoming connection.
7365 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
7367 o Minor bugfix (directory authority, backport from 0.3.3.2-alpha):
7368 - Directory authorities, when refusing a descriptor from a rejected
7369 relay, now explicitly tell the relay (in its logs) to set a valid
7370 ContactInfo address and contact the bad-relays@ mailing list.
7371 Fixes bug 25170; bugfix on 0.2.9.1.
7373 o Minor bugfixes (address selection, backport from 0.3.2.9):
7374 - When the fascist_firewall_choose_address_ functions don't find a
7375 reachable address, set the returned address to the null address
7376 and port. This is a precautionary measure, because some callers do
7377 not check the return value. Fixes bug 24736; bugfix
7380 o Major bugfixes (bootstrapping, backport from 0.3.2.5-alpha):
7381 - Fetch descriptors aggressively whenever we lack enough to build
7382 circuits, regardless of how many descriptors we are missing.
7383 Previously, we would delay launching the fetch when we had fewer
7384 than 15 missing descriptors, even if some of those descriptors
7385 were blocking circuits from building. Fixes bug 23985; bugfix on
7386 0.1.1.11-alpha. The effects of this bug became worse in
7387 0.3.0.3-alpha, when we began treating missing descriptors from our
7388 primary guards as a reason to delay circuits.
7389 - Don't try fetching microdescriptors from relays that have failed
7390 to deliver them in the past. Fixes bug 23817; bugfix
7393 o Minor bugfixes (compilation, backport from 0.3.2.7-rc):
7394 - Fix a signed/unsigned comparison warning introduced by our fix to
7395 TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
7397 o Minor bugfixes (control port, linux seccomp2 sandbox, backport from 0.3.2.5-alpha):
7398 - Avoid a crash when attempting to use the seccomp2 sandbox together
7399 with the OwningControllerProcess feature. Fixes bug 24198; bugfix
7402 o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
7403 - Fix a possible crash on malformed consensus. If a consensus had
7404 contained an unparseable protocol line, it could have made clients
7405 and relays crash with a null-pointer exception. To exploit this
7406 issue, however, an attacker would need to be able to subvert the
7407 directory authority system. Fixes bug 25251; bugfix on
7408 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
7410 o Minor bugfixes (directory cache, backport from 0.3.2.5-alpha):
7411 - Recover better from empty or corrupt files in the consensus cache
7412 directory. Fixes bug 24099; bugfix on 0.3.1.1-alpha.
7413 - When a consensus diff calculation is only partially successful,
7414 only record the successful parts as having succeeded. Partial
7415 success can happen if (for example) one compression method fails
7416 but the others succeed. Previously we misrecorded all the
7417 calculations as having succeeded, which would later cause a
7418 nonfatal assertion failure. Fixes bug 24086; bugfix
7421 o Minor bugfixes (entry guards, backport from 0.3.2.3-alpha):
7422 - Tor now updates its guard state when it reads a consensus
7423 regardless of whether it's missing descriptors. That makes tor use
7424 its primary guards to fetch descriptors in some edge cases where
7425 it would previously have used fallback directories. Fixes bug
7426 23862; bugfix on 0.3.0.1-alpha.
7428 o Minor bugfixes (logging, backport from 0.3.3.2-alpha):
7429 - Don't treat inability to store a cached consensus object as a bug:
7430 it can happen normally when we are out of disk space. Fixes bug
7431 24859; bugfix on 0.3.1.1-alpha.
7433 o Minor bugfixes (memory usage, backport from 0.3.2.8-rc):
7434 - When queuing DESTROY cells on a channel, only queue the circuit-id
7435 and reason fields: not the entire 514-byte cell. This fix should
7436 help mitigate any bugs or attacks that fill up these queues, and
7437 free more RAM for other uses. Fixes bug 24666; bugfix
7440 o Minor bugfixes (network layer, backport from 0.3.2.5-alpha):
7441 - When closing a connection via close_connection_immediately(), we
7442 mark it as "not blocked on bandwidth", to prevent later calls from
7443 trying to unblock it, and give it permission to read. This fixes a
7444 backtrace warning that can happen on relays under various
7445 circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
7447 o Minor bugfixes (path selection, backport from 0.3.2.4-alpha):
7448 - When selecting relays by bandwidth, avoid a rounding error that
7449 could sometimes cause load to be imbalanced incorrectly.
7450 Previously, we would always round upwards; now, we round towards
7451 the nearest integer. This had the biggest effect when a relay's
7452 weight adjustments should have given it weight 0, but it got
7453 weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
7454 - When calculating the fraction of nodes that have descriptors, and
7455 all nodes in the network have zero bandwidths, count the number of
7456 nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
7457 - Actually log the total bandwidth in compute_weighted_bandwidths().
7458 Fixes bug 24170; bugfix on 0.2.4.3-alpha.
7460 o Minor bugfixes (performance, fragile-hardening, backport from 0.3.3.1-alpha):
7461 - Improve the performance of our consensus-diff application code
7462 when Tor is built with the --enable-fragile-hardening option set.
7463 Fixes bug 24826; bugfix on 0.3.1.1-alpha.
7465 o Minor bugfixes (OSX, backport from 0.3.3.1-alpha):
7466 - Don't exit the Tor process if setrlimit() fails to change the file
7467 limit (which can happen sometimes on some versions of OSX). Fixes
7468 bug 21074; bugfix on 0.0.9pre5.
7470 o Minor bugfixes (portability, msvc, backport from 0.3.2.9):
7471 - Fix a bug in the bit-counting parts of our timing-wheel code on
7472 MSVC. (Note that MSVC is still not a supported build platform, due
7473 to cyptographic timing channel risks.) Fixes bug 24633; bugfix
7476 o Minor bugfixes (relay, partial backport):
7477 - Make the internal channel_is_client() function look at what sort
7478 of connection handshake the other side used, rather than whether
7479 the other side ever sent a create_fast cell to us. Backports part
7480 of the fixes from bugs 22805 and 24898.
7482 o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
7483 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
7485 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
7486 bugfix on 0.2.9.4-alpha.
7488 o Code simplification and refactoring (backport from 0.3.3.3-alpha):
7489 - Update the "rust dependencies" submodule to be a project-level
7490 repository, rather than a user repository. Closes ticket 25323.
7493 Changes in version 0.2.9.15 - 2018-03-03
7494 Tor 0.2.9.15 backports important security and stability bugfixes from
7497 It includes an important security fix for a remote crash attack
7498 against directory authorities, tracked as TROVE-2018-001.
7500 This release also backports our new system for improved resistance to
7501 denial-of-service attacks against relays.
7503 This release also fixes several minor bugs and annoyances from
7506 All directory authorities should upgrade to one of the versions
7507 released today. Relays running 0.2.9.x may wish to update to one of
7508 the versions released today, for the DoS mitigations.
7510 o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
7511 - Fix a protocol-list handling bug that could be used to remotely crash
7512 directory authorities with a null-pointer exception. Fixes bug 25074;
7513 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
7516 o Major features (denial-of-service mitigation):
7517 - Give relays some defenses against the recent network overload. We
7518 start with three defenses (default parameters in parentheses).
7519 First: if a single client address makes too many concurrent
7520 connections (>100), hang up on further connections. Second: if a
7521 single client address makes circuits too quickly (more than 3 per
7522 second, with an allowed burst of 90) while also having too many
7523 connections open (3), refuse new create cells for the next while
7524 (1-2 hours). Third: if a client asks to establish a rendezvous
7525 point to you directly, ignore the request. These defenses can be
7526 manually controlled by new torrc options, but relays will also
7527 take guidance from consensus parameters, so there's no need to
7528 configure anything manually. Implements ticket 24902.
7530 o Major bugfixes (bootstrapping):
7531 - Fetch descriptors aggressively whenever we lack enough to build
7532 circuits, regardless of how many descriptors we are missing.
7533 Previously, we would delay launching the fetch when we had fewer
7534 than 15 missing descriptors, even if some of those descriptors
7535 were blocking circuits from building. Fixes bug 23985; bugfix on
7536 0.1.1.11-alpha. The effects of this bug became worse in
7537 0.3.0.3-alpha, when we began treating missing descriptors from our
7538 primary guards as a reason to delay circuits.
7540 o Major bugfixes (onion services, retry behavior):
7541 - Fix an "off by 2" error in counting rendezvous failures on the
7542 onion service side. While we thought we would stop the rendezvous
7543 attempt after one failed circuit, we were actually making three
7544 circuit attempts before giving up. Now switch to a default of 2,
7545 and allow the consensus parameter "hs_service_max_rdv_failures" to
7546 override. Fixes bug 24895; bugfix on 0.0.6.
7548 o Minor feature (relay statistics):
7549 - Change relay bandwidth reporting stats interval from 4 hours to 24
7550 hours in order to reduce the efficiency of guard discovery
7551 attacks. Fixes ticket 23856.
7553 o Minor features (compatibility, OpenSSL):
7554 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
7555 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
7556 since they neither disabled TLS 1.3 nor enabled any of the
7557 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
7558 Closes ticket 24978.
7560 o Minor features (denial-of-service avoidance):
7561 - Make our OOM handler aware of the geoip client history cache so it
7562 doesn't fill up the memory. This check is important for IPv6 and
7563 our DoS mitigation subsystem. Closes ticket 25122.
7565 o Minor features (fallback directory mirrors):
7566 - The fallback directory list has been re-generated based on the
7567 current status of the network. Tor uses fallback directories to
7568 bootstrap when it doesn't yet have up-to-date directory
7569 information. Closes ticket 24801.
7570 - Make the default DirAuthorityFallbackRate 0.1, so that clients
7571 prefer to bootstrap from fallback directory mirrors. This is a
7572 follow-up to 24679, which removed weights from the default
7573 fallbacks. Implements ticket 24681.
7575 o Minor features (geoip):
7576 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
7579 o Minor features (linux seccomp2 sandbox):
7580 - Update the sandbox rules so that they should now work correctly
7581 with Glibc 2.26. Closes ticket 24315.
7583 o Minor bugfix (channel connection):
7584 - Use the actual observed address of an incoming relay connection,
7585 not the canonical address of the relay from its descriptor, when
7586 making decisions about how to handle the incoming connection.
7587 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
7589 o Minor bugfix (directory authority):
7590 - Directory authorities, when refusing a descriptor from a rejected
7591 relay, now explicitly tell the relay (in its logs) to set a valid
7592 ContactInfo address and contact the bad-relays@ mailing list.
7593 Fixes bug 25170; bugfix on 0.2.9.1.
7595 o Minor bugfixes (address selection):
7596 - When the fascist_firewall_choose_address_ functions don't find a
7597 reachable address, set the returned address to the null address
7598 and port. This is a precautionary measure, because some callers do
7599 not check the return value. Fixes bug 24736; bugfix
7602 o Minor bugfixes (compilation):
7603 - Fix a signed/unsigned comparison warning introduced by our fix to
7604 TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
7606 o Minor bugfixes (control port, linux seccomp2 sandbox):
7607 - Avoid a crash when attempting to use the seccomp2 sandbox together
7608 with the OwningControllerProcess feature. Fixes bug 24198; bugfix
7611 o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
7612 - Fix a possible crash on malformed consensus. If a consensus had
7613 contained an unparseable protocol line, it could have made clients
7614 and relays crash with a null-pointer exception. To exploit this
7615 issue, however, an attacker would need to be able to subvert the
7616 directory authority system. Fixes bug 25251; bugfix on
7617 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
7619 o Minor bugfixes (memory usage):
7620 - When queuing DESTROY cells on a channel, only queue the circuit-id
7621 and reason fields: not the entire 514-byte cell. This fix should
7622 help mitigate any bugs or attacks that fill up these queues, and
7623 free more RAM for other uses. Fixes bug 24666; bugfix
7626 o Minor bugfixes (network layer):
7627 - When closing a connection via close_connection_immediately(), we
7628 mark it as "not blocked on bandwidth", to prevent later calls from
7629 trying to unblock it, and give it permission to read. This fixes a
7630 backtrace warning that can happen on relays under various
7631 circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
7633 o Minor bugfixes (OSX):
7634 - Don't exit the Tor process if setrlimit() fails to change the file
7635 limit (which can happen sometimes on some versions of OSX). Fixes
7636 bug 21074; bugfix on 0.0.9pre5.
7638 o Minor bugfixes (path selection):
7639 - When selecting relays by bandwidth, avoid a rounding error that
7640 could sometimes cause load to be imbalanced incorrectly.
7641 Previously, we would always round upwards; now, we round towards
7642 the nearest integer. This had the biggest effect when a relay's
7643 weight adjustments should have given it weight 0, but it got
7644 weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
7645 - When calculating the fraction of nodes that have descriptors, and
7646 all nodes in the network have zero bandwidths, count the number of
7647 nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
7648 - Actually log the total bandwidth in compute_weighted_bandwidths().
7649 Fixes bug 24170; bugfix on 0.2.4.3-alpha.
7651 o Minor bugfixes (portability, msvc):
7652 - Fix a bug in the bit-counting parts of our timing-wheel code on
7653 MSVC. (Note that MSVC is still not a supported build platform, due
7654 to cryptographic timing channel risks.) Fixes bug 24633; bugfix
7657 o Minor bugfixes (relay):
7658 - Make the internal channel_is_client() function look at what sort
7659 of connection handshake the other side used, rather than whether
7660 the other side ever sent a create_fast cell to us. Backports part
7661 of the fixes from bugs 22805 and 24898.
7663 o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
7664 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
7666 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
7667 bugfix on 0.2.9.4-alpha.
7670 Changes in version 0.3.2.10 - 2018-03-03
7671 Tor 0.3.2.10 is the second stable release in the 0.3.2 series. It
7672 backports a number of bugfixes, including important fixes for security
7675 It includes an important security fix for a remote crash attack
7676 against directory authorities, tracked as TROVE-2018-001.
7678 Additionally, it backports a fix for a bug whose severity we have
7679 upgraded: Bug 24700, which was fixed in 0.3.3.2-alpha, can be remotely
7680 triggered in order to crash relays with a use-after-free pattern. As
7681 such, we are now tracking that bug as TROVE-2018-002 and
7682 CVE-2018-0491, and backporting it to earlier releases. This bug
7683 affected versions 0.3.2.1-alpha through 0.3.2.9, as well as version
7686 This release also backports our new system for improved resistance to
7687 denial-of-service attacks against relays.
7689 This release also fixes several minor bugs and annoyances from
7692 Relays running 0.3.2.x SHOULD upgrade to one of the versions released
7693 today, for the fix to TROVE-2018-002. Directory authorities should
7694 also upgrade. (Relays on earlier versions might want to update too for
7695 the DoS mitigations.)
7697 o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
7698 - Fix a protocol-list handling bug that could be used to remotely crash
7699 directory authorities with a null-pointer exception. Fixes bug 25074;
7700 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
7703 o Major bugfixes (scheduler, KIST, denial-of-service, backport from 0.3.3.2-alpha):
7704 - Avoid adding the same channel twice in the KIST scheduler pending
7705 list, which could lead to remote denial-of-service use-after-free
7706 attacks against relays. Fixes bug 24700; bugfix on 0.3.2.1-alpha.
7708 o Major features (denial-of-service mitigation, backport from 0.3.3.2-alpha):
7709 - Give relays some defenses against the recent network overload. We
7710 start with three defenses (default parameters in parentheses).
7711 First: if a single client address makes too many concurrent
7712 connections (>100), hang up on further connections. Second: if a
7713 single client address makes circuits too quickly (more than 3 per
7714 second, with an allowed burst of 90) while also having too many
7715 connections open (3), refuse new create cells for the next while
7716 (1-2 hours). Third: if a client asks to establish a rendezvous
7717 point to you directly, ignore the request. These defenses can be
7718 manually controlled by new torrc options, but relays will also
7719 take guidance from consensus parameters, so there's no need to
7720 configure anything manually. Implements ticket 24902.
7722 o Major bugfixes (onion services, retry behavior, backport from 0.3.3.1-alpha):
7723 - Fix an "off by 2" error in counting rendezvous failures on the
7724 onion service side. While we thought we would stop the rendezvous
7725 attempt after one failed circuit, we were actually making three
7726 circuit attempts before giving up. Now switch to a default of 2,
7727 and allow the consensus parameter "hs_service_max_rdv_failures" to
7728 override. Fixes bug 24895; bugfix on 0.0.6.
7729 - New-style (v3) onion services now obey the "max rendezvous circuit
7730 attempts" logic. Previously they would make as many rendezvous
7731 circuit attempts as they could fit in the MAX_REND_TIMEOUT second
7732 window before giving up. Fixes bug 24894; bugfix on 0.3.2.1-alpha.
7734 o Major bugfixes (protocol versions, backport from 0.3.3.2-alpha):
7735 - Add Link protocol version 5 to the supported protocols list. Fixes
7736 bug 25070; bugfix on 0.3.1.1-alpha.
7738 o Major bugfixes (relay, backport from 0.3.3.1-alpha):
7739 - Fix a set of false positives where relays would consider
7740 connections to other relays as being client-only connections (and
7741 thus e.g. deserving different link padding schemes) if those
7742 relays fell out of the consensus briefly. Now we look only at the
7743 initial handshake and whether the connection authenticated as a
7744 relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
7746 o Major bugfixes (scheduler, consensus, backport from 0.3.3.2-alpha):
7747 - The scheduler subsystem was failing to promptly notice changes in
7748 consensus parameters, making it harder to switch schedulers
7749 network-wide. Fixes bug 24975; bugfix on 0.3.2.1-alpha.
7751 o Minor features (denial-of-service avoidance, backport from 0.3.3.2-alpha):
7752 - Make our OOM handler aware of the geoip client history cache so it
7753 doesn't fill up the memory. This check is important for IPv6 and
7754 our DoS mitigation subsystem. Closes ticket 25122.
7756 o Minor features (compatibility, OpenSSL, backport from 0.3.3.3-alpha):
7757 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
7758 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
7759 since they neither disabled TLS 1.3 nor enabled any of the
7760 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
7761 Closes ticket 24978.
7763 o Minor features (geoip):
7764 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
7767 o Minor features (logging, diagnostic, backport from 0.3.3.2-alpha):
7768 - When logging a failure to create an onion service's descriptor,
7769 also log what the problem with the descriptor was. Diagnostic
7772 o Minor bugfix (channel connection, backport from 0.3.3.2-alpha):
7773 - Use the actual observed address of an incoming relay connection,
7774 not the canonical address of the relay from its descriptor, when
7775 making decisions about how to handle the incoming connection.
7776 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
7778 o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
7779 - Fix a possible crash on malformed consensus. If a consensus had
7780 contained an unparseable protocol line, it could have made clients
7781 and relays crash with a null-pointer exception. To exploit this
7782 issue, however, an attacker would need to be able to subvert the
7783 directory authority system. Fixes bug 25251; bugfix on
7784 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
7786 o Minor bugfix (directory authority, backport from 0.3.3.2-alpha):
7787 - Directory authorities, when refusing a descriptor from a rejected
7788 relay, now explicitly tell the relay (in its logs) to set a valid
7789 ContactInfo address and contact the bad-relays@ mailing list.
7790 Fixes bug 25170; bugfix on 0.2.9.1.
7792 o Minor bugfixes (build, rust, backport from 0.3.3.1-alpha):
7793 - When building with Rust on OSX, link against libresolv, to work
7794 around the issue at https://github.com/rust-lang/rust/issues/46797.
7795 Fixes bug 24652; bugfix on 0.3.1.1-alpha.
7797 o Minor bugfixes (onion services, backport from 0.3.3.2-alpha):
7798 - Remove a BUG() statement when a client fetches an onion descriptor
7799 that has a lower revision counter than the one in its cache. This
7800 can happen in normal circumstances due to HSDir desync. Fixes bug
7801 24976; bugfix on 0.3.2.1-alpha.
7803 o Minor bugfixes (logging, backport from 0.3.3.2-alpha):
7804 - Don't treat inability to store a cached consensus object as a bug:
7805 it can happen normally when we are out of disk space. Fixes bug
7806 24859; bugfix on 0.3.1.1-alpha.
7808 o Minor bugfixes (performance, fragile-hardening, backport from 0.3.3.1-alpha):
7809 - Improve the performance of our consensus-diff application code
7810 when Tor is built with the --enable-fragile-hardening option set.
7811 Fixes bug 24826; bugfix on 0.3.1.1-alpha.
7813 o Minor bugfixes (OSX, backport from 0.3.3.1-alpha):
7814 - Don't exit the Tor process if setrlimit() fails to change the file
7815 limit (which can happen sometimes on some versions of OSX). Fixes
7816 bug 21074; bugfix on 0.0.9pre5.
7818 o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
7819 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
7821 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
7822 bugfix on 0.2.9.4-alpha.
7824 o Minor bugfixes (testing, backport from 0.3.3.1-alpha):
7825 - Fix a memory leak in the scheduler/loop_kist unit test. Fixes bug
7826 25005; bugfix on 0.3.2.7-rc.
7828 o Minor bugfixes (v3 onion services, backport from 0.3.3.2-alpha):
7829 - Look at the "HSRend" protocol version, not the "HSDir" protocol
7830 version, when deciding whether a consensus entry can support the
7831 v3 onion service protocol as a rendezvous point. Fixes bug 25105;
7832 bugfix on 0.3.2.1-alpha.
7834 o Code simplification and refactoring (backport from 0.3.3.3-alpha):
7835 - Update the "rust dependencies" submodule to be a project-level
7836 repository, rather than a user repository. Closes ticket 25323.
7838 o Documentation (backport from 0.3.3.1-alpha)
7839 - Document that operators who run more than one relay or bridge are
7840 expected to set MyFamily and ContactInfo correctly. Closes
7844 Changes in version 0.3.3.3-alpha - 2018-03-03
7845 Tor 0.3.3.3-alpha is the third alpha release for the 0.3.3.x series.
7846 It includes an important security fix for a remote crash attack
7847 against directory authorities tracked as TROVE-2018-001.
7849 Additionally, with this release, we are upgrading the severity of a
7850 bug fixed in 0.3.3.2-alpha. Bug 24700, which was fixed in
7851 0.3.3.2-alpha, can be remotely triggered in order to crash relays with
7852 a use-after-free pattern. As such, we are now tracking that bug as
7853 TROVE-2018-002 and CVE-2018-0491. This bug affected versions
7854 0.3.2.1-alpha through 0.3.2.9, as well as 0.3.3.1-alpha.
7856 This release also fixes several minor bugs and annoyances from
7859 Relays running 0.3.2.x should upgrade to one of the versions released
7860 today, for the fix to TROVE-2018-002. Directory authorities should
7861 also upgrade. (Relays on earlier versions might want to update too for
7862 the DoS mitigations.)
7864 o Major bugfixes (denial-of-service, directory authority):
7865 - Fix a protocol-list handling bug that could be used to remotely crash
7866 directory authorities with a null-pointer exception. Fixes bug 25074;
7867 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
7870 o Minor features (compatibility, OpenSSL):
7871 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
7872 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
7873 since they neither disabled TLS 1.3 nor enabled any of the
7874 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
7875 Closes ticket 24978.
7877 o Minor features (logging):
7878 - Clarify the log messages produced when getrandom() or a related
7879 entropy-generation mechanism gives an error. Closes ticket 25120.
7881 o Minor features (testing):
7882 - Add a "make test-rust" target to run the rust tests only. Closes
7885 o Minor bugfixes (denial-of-service):
7886 - Fix a possible crash on malformed consensus. If a consensus had
7887 contained an unparseable protocol line, it could have made clients
7888 and relays crash with a null-pointer exception. To exploit this
7889 issue, however, an attacker would need to be able to subvert the
7890 directory authority system. Fixes bug 25251; bugfix on
7891 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
7893 o Minor bugfixes (DoS mitigation):
7894 - Add extra safety checks when refilling the circuit creation bucket
7895 to ensure we never set a value above the allowed maximum burst.
7896 Fixes bug 25202; bugfix on 0.3.3.2-alpha.
7897 - When a new consensus arrives, don't update our DoS-mitigation
7898 parameters if we aren't a public relay. Fixes bug 25223; bugfix
7901 o Minor bugfixes (man page, SocksPort):
7902 - Remove dead code from the old "SocksSocket" option, and rename
7903 SocksSocketsGroupWritable to UnixSocksGroupWritable. The old option
7904 still works, but is deprecated. Fixes bug 24343; bugfix on 0.2.6.3.
7906 o Minor bugfixes (performance):
7907 - Reduce the number of circuits that will be opened at once during
7908 the circuit build timeout phase. This is done by increasing the
7909 idle timeout to 3 minutes, and lowering the maximum number of
7910 concurrent learning circuits to 10. Fixes bug 24769; bugfix
7913 o Minor bugfixes (spec conformance):
7914 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
7916 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
7917 bugfix on 0.2.9.4-alpha.
7919 o Minor bugfixes (spec conformance, rust):
7920 - Resolve a denial-of-service issue caused by an infinite loop in
7921 the rust protover code. Fixes bug 25250, bugfix on 0.3.3.1-alpha.
7922 Also tracked as TROVE-2018-003.
7924 o Code simplification and refactoring:
7925 - Update the "rust dependencies" submodule to be a project-level
7926 repository, rather than a user repository. Closes ticket 25323.
7929 Changes in version 0.3.3.2-alpha - 2018-02-10
7930 Tor 0.3.3.2-alpha is the second alpha in the 0.3.3.x series. It
7931 introduces a mechanism to handle the high loads that many relay
7932 operators have been reporting recently. It also fixes several bugs in
7933 older releases. If this new code proves reliable, we plan to backport
7934 it to older supported release series.
7936 o Major features (denial-of-service mitigation):
7937 - Give relays some defenses against the recent network overload. We
7938 start with three defenses (default parameters in parentheses).
7939 First: if a single client address makes too many concurrent
7940 connections (>100), hang up on further connections. Second: if a
7941 single client address makes circuits too quickly (more than 3 per
7942 second, with an allowed burst of 90) while also having too many
7943 connections open (3), refuse new create cells for the next while
7944 (1-2 hours). Third: if a client asks to establish a rendezvous
7945 point to you directly, ignore the request. These defenses can be
7946 manually controlled by new torrc options, but relays will also
7947 take guidance from consensus parameters, so there's no need to
7948 configure anything manually. Implements ticket 24902.
7950 o Major bugfixes (netflow padding):
7951 - Stop adding unneeded channel padding right after we finish
7952 flushing to a connection that has been trying to flush for many
7953 seconds. Instead, treat all partial or complete flushes as
7954 activity on the channel, which will defer the time until we need
7955 to add padding. This fix should resolve confusing and scary log
7956 messages like "Channel padding timeout scheduled 221453ms in the
7957 past." Fixes bug 22212; bugfix on 0.3.1.1-alpha.
7959 o Major bugfixes (protocol versions):
7960 - Add Link protocol version 5 to the supported protocols list. Fixes
7961 bug 25070; bugfix on 0.3.1.1-alpha.
7963 o Major bugfixes (scheduler, consensus):
7964 - The scheduler subsystem was failing to promptly notice changes in
7965 consensus parameters, making it harder to switch schedulers
7966 network-wide. Fixes bug 24975; bugfix on 0.3.2.1-alpha.
7968 o Minor features (denial-of-service avoidance):
7969 - Make our OOM handler aware of the geoip client history cache so it
7970 doesn't fill up the memory. This check is important for IPv6 and
7971 our DoS mitigation subsystem. Closes ticket 25122.
7973 o Minor features (directory authority):
7974 - When directory authorities are unable to add signatures to a
7975 pending consensus, log the reason why. Closes ticket 24849.
7977 o Minor features (geoip):
7978 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
7981 o Minor features (logging, diagnostic):
7982 - When logging a failure to create an onion service's descriptor,
7983 also log what the problem with the descriptor was. Diagnostic for
7986 o Minor bugfix (channel connection):
7987 - Use the actual observed address of an incoming relay connection,
7988 not the canonical address of the relay from its descriptor, when
7989 making decisions about how to handle the incoming connection.
7990 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
7992 o Minor bugfix (directory authority):
7993 - Directory authorities, when refusing a descriptor from a rejected
7994 relay, now explicitly tell the relay (in its logs) to set a valid
7995 ContactInfo address and contact the bad-relays@ mailing list.
7996 Fixes bug 25170; bugfix on 0.2.9.1.
7998 o Minor bugfixes (all versions of Tor):
7999 - Use the "misspell" tool to detect and fix typos throughout the
8000 source code. Fixes bug 23650; bugfix on various versions of Tor.
8001 Patch from Deepesh Pathak.
8003 o Minor bugfixes (circuit, cannibalization):
8004 - Don't cannibalize preemptively-built circuits if we no longer
8005 recognize their first hop. This situation can happen if our Guard
8006 relay went off the consensus after the circuit was created. Fixes
8007 bug 24469; bugfix on 0.0.6.
8009 o Minor bugfixes (correctness):
8010 - Remove a nonworking, unnecessary check to see whether a circuit
8011 hop's identity digest was set when the circuit failed. Fixes bug
8012 24927; bugfix on 0.2.4.4-alpha.
8014 o Minor bugfixes (logging):
8015 - Don't treat inability to store a cached consensus object as a bug:
8016 it can happen normally when we are out of disk space. Fixes bug
8017 24859; bugfix on 0.3.1.1-alpha.
8018 - Fix a (mostly harmless) race condition when invoking
8019 LOG_PROTOCOL_WARN message from a subthread while the torrc options
8020 are changing. Fixes bug 23954; bugfix on 0.1.1.9-alpha.
8022 o Minor bugfixes (onion services):
8023 - Remove a BUG() statement when a client fetches an onion descriptor
8024 that has a lower revision counter than the one in its cache. This
8025 can happen in normal circumstances due to HSDir desync. Fixes bug
8026 24976; bugfix on 0.3.2.1-alpha.
8027 - If we are configured to offer a single onion service, don't log
8028 long-term established one hop rendezvous points in the heartbeat.
8029 Fixes bug 25116; bugfix on 0.2.9.6-rc.
8031 o Minor bugfixes (performance):
8032 - Avoid calling protocol_list_supports_protocol() from inside tight
8033 loops when running with cached routerinfo_t objects. Instead,
8034 summarize the relevant protocols as flags in the routerinfo_t, as
8035 we do for routerstatus_t objects. This change simplifies our code
8036 a little, and saves a large amount of short-term memory allocation
8037 operations. Fixes bug 25008; bugfix on 0.2.9.4-alpha.
8039 o Minor bugfixes (Rust FFI):
8040 - Fix a minor memory leak which would happen whenever the C code
8041 would call the Rust implementation of
8042 protover_get_supported_protocols(). This was due to the C version
8043 returning a static string, whereas the Rust version newly allocated
8044 a CString to pass across the FFI boundary. Consequently, the C
8045 code was not expecting to need to free() what it was given. Fixes
8046 bug 25127; bugfix on 0.3.2.1-alpha.
8048 o Minor bugfixes (scheduler, KIST):
8049 - Avoid adding the same channel twice in the KIST scheduler pending
8050 list, which would waste CPU cycles. Fixes bug 24700; bugfix
8053 o Minor bugfixes (unit test, monotonic time):
8054 - Increase a constant (1msec to 10msec) in the monotonic time test
8055 that makes sure the nsec/usec/msec times read are synchronized.
8056 This change was needed to accommodate slow systems like armel or
8057 when the clock_gettime() is not a VDSO on the running kernel.
8058 Fixes bug 25113; bugfix on 0.2.9.1.
8060 o Minor bugfixes (v3 onion services):
8061 - Look at the "HSRend" protocol version, not the "HSDir" protocol
8062 version, when deciding whether a consensus entry can support the
8063 v3 onion service protocol as a rendezvous point. Fixes bug 25105;
8064 bugfix on 0.3.2.1-alpha.
8066 o Code simplification and refactoring:
8067 - Remove the unused nodelist_recompute_all_hsdir_indices(). Closes
8069 - Remove a series of counters used to track circuit extend attempts
8070 and connection status but that in reality we aren't using for
8071 anything other than stats logged by a SIGUSR1 signal. Closes
8074 o Documentation (man page):
8075 - The HiddenServiceVersion torrc option accepts only one number:
8076 either version 2 or 3. Closes ticket 25026; bugfix
8080 Changes in version 0.3.3.1-alpha - 2018-01-25
8081 Tor 0.3.3.1-alpha is the first release in the 0.3.3.x series. It adds
8082 several new features to Tor, including several improvements to
8083 bootstrapping, and support for an experimental "vanguards" feature to
8084 resist guard discovery attacks. This series also includes better
8085 support for applications that need to embed Tor or manage v3
8088 o Major features (embedding):
8089 - There is now a documented stable API for programs that need to
8090 embed Tor. See tor_api.h for full documentation and known bugs.
8091 Closes ticket 23684.
8092 - Tor now has support for restarting in the same process.
8093 Controllers that run Tor using the "tor_api.h" interface can now
8094 restart Tor after Tor has exited. This support is incomplete,
8095 however: we fixed crash bugs that prevented it from working at
8096 all, but many bugs probably remain, including a possibility of
8097 security issues. Implements ticket 24581.
8099 o Major features (IPv6, directory documents):
8100 - Add consensus method 27, which adds IPv6 ORPorts to the microdesc
8101 consensus. This information makes it easier for IPv6 clients to
8102 bootstrap and choose reachable entry guards. Implements ticket 23826.
8103 - Add consensus method 28, which removes IPv6 ORPorts from
8104 microdescriptors. Now that the consensus contains IPv6 ORPorts, they
8105 are redundant in microdescs. This change will be used by Tor clients
8106 on 0.2.8.x and later. (That is to say, with all Tor clients that
8107 have IPv6 bootstrap and guard support.) Implements ticket 23828.
8108 - Expand the documentation for AuthDirHasIPv6Connectivity when it is
8109 set by different numbers of authorities. Fixes 23870
8112 o Major features (onion service v3, control port):
8113 - The control port now supports commands and events for v3 onion
8114 services. It is now possible to create ephemeral v3 services using
8115 ADD_ONION. Additionally, several events (HS_DESC, HS_DESC_CONTENT,
8116 CIRC and CIRC_MINOR) and commands (GETINFO, HSPOST, ADD_ONION and
8117 DEL_ONION) have been extended to support v3 onion services. Closes
8118 ticket 20699; implements proposal 284.
8120 o Major features (onion services):
8121 - Provide torrc options to pin the second and third hops of onion
8122 service circuits to a list of nodes. The option HSLayer2Guards
8123 pins the second hop, and the option HSLayer3Guards pins the third
8124 hop. These options are for use in conjunction with experiments
8125 with "vanguards" for preventing guard enumeration attacks. Closes
8128 o Major features (rust, portability, experimental):
8129 - Tor now ships with an optional implementation of one of its
8130 smaller modules (protover.c) in the Rust programming language. To
8131 try it out, install a Rust build environment, and configure Tor
8132 with "--enable-rust --enable-cargo-online-mode". This should not
8133 cause any user-visible changes, but should help us gain more
8134 experience with Rust, and plan future Rust integration work.
8135 Implementation by Chelsea Komlo. Closes ticket 22840.
8137 o Minor features (storage, configuration):
8138 - Users can store cached directory documents somewhere other than
8139 the DataDirectory by using the CacheDirectory option. Similarly,
8140 the storage location for relay's keys can be overridden with the
8141 KeyDirectory option. Closes ticket 22703.
8143 o Major features (v3 onion services, ipv6):
8144 - When v3 onion service clients send introduce cells, they now
8145 include the IPv6 address of the rendezvous point, if it has one.
8146 Current v3 onion services running 0.3.2 ignore IPv6 addresses, but
8147 in future Tor versions, IPv6-only v3 single onion services will be
8148 able to use IPv6 addresses to connect directly to the rendezvous
8149 point. Closes ticket 23577. Patch by Neel Chauhan.
8151 o Major bugfixes (onion services, retry behavior):
8152 - Fix an "off by 2" error in counting rendezvous failures on the
8153 onion service side. While we thought we would stop the rendezvous
8154 attempt after one failed circuit, we were actually making three
8155 circuit attempts before giving up. Now switch to a default of 2,
8156 and allow the consensus parameter "hs_service_max_rdv_failures" to
8157 override. Fixes bug 24895; bugfix on 0.0.6.
8158 - New-style (v3) onion services now obey the "max rendezvous circuit
8159 attempts" logic. Previously they would make as many rendezvous
8160 circuit attempts as they could fit in the MAX_REND_TIMEOUT second
8161 window before giving up. Fixes bug 24894; bugfix on 0.3.2.1-alpha.
8163 o Major bugfixes (relays):
8164 - Fix a set of false positives where relays would consider
8165 connections to other relays as being client-only connections (and
8166 thus e.g. deserving different link padding schemes) if those
8167 relays fell out of the consensus briefly. Now we look only at the
8168 initial handshake and whether the connection authenticated as a
8169 relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
8171 o Minor feature (IPv6):
8172 - Make IPv6-only clients wait for microdescs for relays, even if we
8173 were previously using descriptors (or were using them as a bridge)
8174 and have a cached descriptor for them. Implements ticket 23827.
8175 - When a consensus has IPv6 ORPorts, make IPv6-only clients use
8176 them, rather than waiting to download microdescriptors.
8177 Implements ticket 23827.
8179 o Minor features (cleanup):
8180 - Tor now deletes the CookieAuthFile and ExtORPortCookieAuthFile
8181 when it stops. Closes ticket 23271.
8183 o Minor features (defensive programming):
8184 - Most of the functions in Tor that free objects have been replaced
8185 with macros that free the objects and set the corresponding
8186 pointers to NULL. This change should help prevent a large class of
8187 dangling pointer bugs. Closes ticket 24337.
8188 - Where possible, the tor_free() macro now only evaluates its input
8189 once. Part of ticket 24337.
8190 - Check that microdesc ed25519 ids are non-zero in
8191 node_get_ed25519_id() before returning them. Implements ticket
8192 24001, patch by "aruna1234".
8194 o Minor features (embedding):
8195 - Tor can now start with a preauthenticated control connection
8196 created by the process that launched it. This feature is meant for
8197 use by programs that want to launch and manage a Tor process
8198 without allowing other programs to manage it as well. For more
8199 information, see the __OwningControllerFD option documented in
8200 control-spec.txt. Closes ticket 23900.
8201 - On most errors that would cause Tor to exit, it now tries to
8202 return from the tor_main() function, rather than calling the
8203 system exit() function. Most users won't notice a difference here,
8204 but it should be significant for programs that run Tor inside
8205 a separate thread: they should now be able to survive Tor's exit
8206 conditions rather than having Tor shut down the entire process.
8207 Closes ticket 23848.
8208 - Applications that want to embed Tor can now tell Tor not to
8209 register any of its own POSIX signal handlers, using the
8210 __DisableSignalHandlers option. Closes ticket 24588.
8212 o Minor features (fallback directory list):
8213 - Avoid selecting fallbacks that change their IP addresses too
8214 often. Select more fallbacks by ignoring the Guard flag, and
8215 allowing lower cutoffs for the Running and V2Dir flags. Also allow
8216 a lower bandwidth, and a higher number of fallbacks per operator
8217 (5% of the list). Implements ticket 24785.
8218 - Update the fallback whitelist and blacklist based on opt-ins and
8219 relay changes. Closes tickets 22321, 24678, 22527, 24135,
8222 o Minor features (fallback directory mirror configuration):
8223 - Add a nickname to each fallback in a C comment. This makes it
8224 easier for operators to find their relays, and allows stem to use
8225 nicknames to identify fallbacks. Implements ticket 24600.
8226 - Add a type and version header to the fallback directory mirror
8227 file. Also add a delimiter to the end of each fallback entry. This
8228 helps external parsers like stem and Relay Search. Implements
8230 - Add an extrainfo cache flag for each fallback in a C comment. This
8231 allows stem to use fallbacks to fetch extra-info documents, rather
8232 than using authorities. Implements ticket 22759.
8233 - Add the generateFallbackDirLine.py script for automatically
8234 generating fallback directory mirror lines from relay fingerprints.
8235 No more typos! Add the lookupFallbackDirContact.py script for
8236 automatically looking up operator contact info from relay
8237 fingerprints. Implements ticket 24706, patch by teor and atagar.
8238 - Reject any fallback directory mirror that serves an expired
8239 consensus. Implements ticket 20942, patch by "minik".
8240 - Remove commas and equals signs from external string inputs to the
8241 fallback list. This avoids format confusion attacks. Implements
8243 - Remove the "weight=10" line from fallback directory mirror
8244 entries. Ticket 24681 will maintain the current fallback weights
8245 by changing Tor's default fallback weight to 10. Implements
8247 - Stop logging excessive information about fallback netblocks.
8248 Implements ticket 24791.
8250 o Minor features (forward-compatibility):
8251 - If a relay supports some link authentication protocol that we do
8252 not recognize, then include that relay's ed25519 key when telling
8253 other relays to extend to it. Previously, we treated future
8254 versions as if they were too old to support ed25519 link
8255 authentication. Closes ticket 20895.
8257 o Minor features (heartbeat):
8258 - Add onion service information to our heartbeat logs, displaying
8259 stats about the activity of configured onion services. Closes
8262 o Minor features (instrumentation, development):
8263 - Add the MainloopStats option to allow developers to get
8264 instrumentation information from the main event loop via the
8265 heartbeat messages. We hope to use this to improve Tor's behavior
8266 when it's trying to sleep. Closes ticket 24605.
8268 o Minor features (log messages):
8269 - Improve a warning message that happens when we fail to re-parse an
8270 old router because of an expired certificate. Closes ticket 20020.
8271 - Make the log more quantitative when we hit MaxMemInQueues
8272 threshold exposing some values. Closes ticket 24501.
8274 o Minor features (logging, android):
8275 - Added support for the Android logging subsystem. Closes
8278 o Minor features (performance):
8279 - Support predictive circuit building for onion service circuits
8280 with multiple layers of guards. Closes ticket 23101.
8281 - Use stdatomic.h where available, rather than mutexes, to implement
8282 atomic_counter_t. Closes ticket 23953.
8284 o Minor features (performance, 32-bit):
8285 - Improve performance on 32-bit systems by avoiding 64-bit division
8286 when calculating the timestamp in milliseconds for channel padding
8287 computations. Implements ticket 24613.
8288 - Improve performance on 32-bit systems by avoiding 64-bit division
8289 when timestamping cells and buffer chunks for OOM calculations.
8290 Implements ticket 24374.
8292 o Minor features (performance, OSX, iOS):
8293 - Use the mach_approximate_time() function (when available) to
8294 implement coarse monotonic time. Having a coarse time function
8295 should avoid a large number of system calls, and improve
8296 performance slightly, especially under load. Closes ticket 24427.
8298 o Minor features (performance, windows):
8299 - Improve performance on Windows Vista and Windows 7 by adjusting
8300 TCP send window size according to the recommendation from
8301 SIO_IDEAL_SEND_BACKLOG_QUERY. Closes ticket 22798. Patch
8304 o Major features (relay):
8305 - Implement an option, ReducedExitPolicy, to allow an Tor exit relay
8306 operator to use a more reasonable ("reduced") exit policy, rather
8307 than the default one. If you want to run an exit node without
8308 thinking too hard about which ports to allow, this one is for you.
8309 Closes ticket 13605. Patch from Neel Chauhan.
8311 o Minor features (testing, debugging, embedding):
8312 - For development purposes, Tor now has a mode in which it runs for
8313 a few seconds, then stops, and starts again without exiting the
8314 process. This mode is meant to help us debug various issues with
8315 ticket 23847. To use this feature, compile with
8316 --enable-restart-debugging, and set the TOR_DEBUG_RESTART
8317 environment variable. This is expected to crash a lot, and is
8318 really meant for developers only. It will likely be removed in a
8319 future release. Implements ticket 24583.
8321 o Minor bugfix (network IPv6 test):
8322 - Tor's test scripts now check if "ping -6 ::1" works when the user
8323 runs "make test-network-all". Fixes bug 24677; bugfix on
8324 0.2.9.3-alpha. Patch by "ffmancera".
8326 o Minor bugfixes (build, rust):
8327 - Fix output of autoconf checks to display success messages for Rust
8328 dependencies and a suitable rustc compiler version. Fixes bug
8329 24612; bugfix on 0.3.1.3-alpha.
8330 - When building with Rust on OSX, link against libresolv, to work
8331 around the issue at https://github.com/rust-lang/rust/issues/46797.
8332 Fixes bug 24652; bugfix on 0.3.1.1-alpha.
8333 - Don't pass the --quiet option to cargo: it seems to suppress some
8334 errors, which is not what we want to do when building. Fixes bug
8335 24518; bugfix on 0.3.1.7.
8336 - Build correctly when building from outside Tor's source tree with
8337 the TOR_RUST_DEPENDENCIES option set. Fixes bug 22768; bugfix
8340 o Minor bugfixes (directory authorities, IPv6):
8341 - When creating a routerstatus (vote) from a routerinfo (descriptor),
8342 set the IPv6 address to the unspecified IPv6 address, and
8343 explicitly initialize the port to zero. Fixes bug 24488; bugfix
8346 o Minor bugfixes (fallback directory mirrors):
8347 - Make updateFallbackDirs.py search harder for python. (Some OSs
8348 don't put it in /usr/bin.) Fixes bug 24708; bugfix
8351 o Minor bugfixes (hibernation, bandwidth accounting, shutdown):
8352 - When hibernating, close connections normally and allow them to
8353 flush. Fixes bug 23571; bugfix on 0.2.4.7-alpha. Also fixes
8355 - Do not attempt to launch self-reachability tests when entering
8356 hibernation. Fixes a case of bug 12062; bugfix on 0.0.9pre5.
8357 - Resolve several bugs related to descriptor fetching on bridge
8358 clients with bandwidth accounting enabled. (This combination is
8359 not recommended!) Fixes a case of bug 12062; bugfix
8361 - When hibernating, do not attempt to launch DNS checks. Fixes a
8362 case of bug 12062; bugfix on 0.1.2.2-alpha.
8363 - When hibernating, do not try to upload or download descriptors.
8364 Fixes a case of bug 12062; bugfix on 0.0.9pre5.
8366 o Minor bugfixes (IPv6, bridges):
8367 - Tor now always sets IPv6 preferences for bridges. Fixes bug 24573;
8368 bugfix on 0.2.8.2-alpha.
8369 - Tor now sets IPv6 address in the routerstatus as well as in the
8370 router descriptors when updating addresses for a bridge. Closes
8371 ticket 24572; bugfix on 0.2.4.5-alpha. Patch by "ffmancera".
8373 o Minor bugfixes (linux seccomp2 sandbox):
8374 - When running with the sandbox enabled, reload configuration files
8375 correctly even when %include was used. Previously we would crash.
8376 Fixes bug 22605; bugfix on 0.3.1. Patch from Daniel Pinto.
8378 o Minor bugfixes (memory leaks):
8379 - Avoid possible at-exit memory leaks related to use of Libevent's
8380 event_base_once() function. (This function tends to leak memory if
8381 the event_base is closed before the event fires.) Fixes bug 24584;
8382 bugfix on 0.2.8.1-alpha.
8383 - Fix a harmless memory leak in tor-resolve. Fixes bug 24582; bugfix
8386 o Minor bugfixes (OSX):
8387 - Don't exit the Tor process if setrlimit() fails to change the file
8388 limit (which can happen sometimes on some versions of OSX). Fixes
8389 bug 21074; bugfix on 0.0.9pre5.
8391 o Minor bugfixes (performance, fragile-hardening):
8392 - Improve the performance of our consensus-diff application code
8393 when Tor is built with the --enable-fragile-hardening option set.
8394 Fixes bug 24826; bugfix on 0.3.1.1-alpha.
8396 o Minor bugfixes (performance, timeouts):
8397 - Consider circuits for timeout as soon as they complete a hop. This
8398 is more accurate than applying the timeout in
8399 circuit_expire_building() because that function is only called
8400 once per second, which is now too slow for typical timeouts on the
8401 current network. Fixes bug 23114; bugfix on 0.2.2.2-alpha.
8402 - Use onion service circuits (and other circuits longer than 3 hops)
8403 to calculate a circuit build timeout. Previously, Tor only
8404 calculated its build timeout based on circuits that planned to be
8405 exactly 3 hops long. With this change, we include measurements
8406 from all circuits at the point where they complete their third
8407 hop. Fixes bug 23100; bugfix on 0.2.2.2-alpha.
8409 o Minor bugfixes (testing):
8410 - Give out Exit flags in bootstrapping networks. Fixes bug 24137;
8411 bugfix on 0.2.3.1-alpha.
8412 - Fix a memory leak in the scheduler/loop_kist unit test. Fixes bug
8413 25005; bugfix on 0.3.2.7-rc.
8415 o Code simplification and refactoring:
8416 - Remove /usr/athena from search path in configure.ac. Closes
8418 - Remove duplicate code in node_has_curve25519_onion_key() and
8419 node_get_curve25519_onion_key(), and add a check for a zero
8420 microdesc curve25519 onion key. Closes ticket 23966, patch by
8421 "aruna1234" and teor.
8422 - Rewrite channel_rsa_id_group_set_badness to reduce temporary
8423 memory allocations with large numbers of OR connections (e.g.
8424 relays). Closes ticket 24119.
8425 - Separate the function that deletes ephemeral files when Tor
8427 - Small changes to Tor's buf_t API to make it suitable for use as a
8428 general-purpose safe string constructor. Closes ticket 22342.
8429 - Switch -Wnormalized=id to -Wnormalized=nfkc in configure.ac to
8430 avoid source code identifier confusion. Closes ticket 24467.
8431 - The tor_git_revision[] constant no longer needs to be redeclared
8432 by everything that links against the rest of Tor. Done as part of
8433 ticket 23845, to simplify our external API.
8434 - We make extend_info_from_node() use node_get_curve25519_onion_key()
8435 introduced in ticket 23577 to access the curve25519 public keys
8436 rather than accessing it directly. Closes ticket 23760. Patch by
8438 - Add a function to log channels' scheduler state changes to aid
8439 debugging efforts. Closes ticket 24531.
8442 - Add documentation on how to build tor with Rust dependencies
8443 without having to be online. Closes ticket 22907; bugfix
8445 - Clarify the behavior of RelayBandwidth{Rate,Burst} with client
8446 traffic. Closes ticket 24318.
8447 - Document that OutboundBindAddress doesn't apply to DNS requests.
8448 Closes ticket 22145. Patch from Aruna Maurya.
8449 - Document that operators who run more than one relay or bridge are
8450 expected to set MyFamily and ContactInfo correctly. Closes
8453 o Code simplification and refactoring (channels):
8454 - Remove the incoming and outgoing channel queues. These were never
8455 used, but still took up a step in our fast path.
8456 - The majority of the channel unit tests have been rewritten and the
8457 code coverage has now been raised to 83.6% for channel.c. Closes
8459 - Remove other dead code from the channel subsystem: All together,
8460 this cleanup has removed more than 1500 lines of code overall and
8461 adding very little except for unit test.
8463 o Code simplification and refactoring (circuit rendezvous):
8464 - Split the client-side rendezvous circuit lookup into two
8465 functions: one that returns only established circuits and another
8466 that returns all kinds of circuits. Closes ticket 23459.
8468 o Code simplification and refactoring (controller):
8469 - Make most of the variables in networkstatus_getinfo_by_purpose()
8470 const. Implements ticket 24489.
8473 Changes in version 0.3.2.9 - 2018-01-09
8474 Tor 0.3.2.9 is the first stable release in the 0.3.2 series.
8476 The 0.3.2 series includes our long-anticipated new onion service
8477 design, with numerous security features. (For more information, see
8478 our blog post at https://blog.torproject.org/fall-harvest.) We also
8479 have a new circuit scheduler algorithm for improved performance on
8480 relays everywhere (see https://blog.torproject.org/kist-and-tell),
8481 along with many smaller features and bugfixes.
8483 Per our stable release policy, we plan to support each stable release
8484 series for at least the next nine months, or for three months after
8485 the first stable release of the next series: whichever is longer. If
8486 you need a release with long-term support, we recommend that you stay
8487 with the 0.2.9 series.
8489 Below is a list of the changes since 0.3.2.8-rc. For a list of all
8490 changes since 0.3.1, see the ReleaseNotes file.
8492 o Minor features (fallback directory mirrors):
8493 - The fallback directory list has been re-generated based on the
8494 current status of the network. Tor uses fallback directories to
8495 bootstrap when it doesn't yet have up-to-date directory
8496 information. Closes ticket 24801.
8497 - Make the default DirAuthorityFallbackRate 0.1, so that clients
8498 prefer to bootstrap from fallback directory mirrors. This is a
8499 follow-up to 24679, which removed weights from the default
8500 fallbacks. Implements ticket 24681.
8502 o Minor features (geoip):
8503 - Update geoip and geoip6 to the January 5 2018 Maxmind GeoLite2
8506 o Minor bugfixes (address selection):
8507 - When the fascist_firewall_choose_address_ functions don't find a
8508 reachable address, set the returned address to the null address
8509 and port. This is a precautionary measure, because some callers do
8510 not check the return value. Fixes bug 24736; bugfix
8513 o Minor bugfixes (compilation):
8514 - Resolve a few shadowed-variable warnings in the onion service
8515 code. Fixes bug 24634; bugfix on 0.3.2.1-alpha.
8517 o Minor bugfixes (portability, msvc):
8518 - Fix a bug in the bit-counting parts of our timing-wheel code on
8519 MSVC. (Note that MSVC is still not a supported build platform, due
8520 to cryptographic timing channel risks.) Fixes bug 24633; bugfix
8524 Changes in version 0.3.2.8-rc - 2017-12-21
8525 Tor 0.3.2.8-rc fixes a pair of bugs in the KIST and KISTLite
8526 schedulers that had led servers under heavy load to overload their
8527 outgoing connections. All relay operators running earlier 0.3.2.x
8528 versions should upgrade. This version also includes a mitigation for
8529 over-full DESTROY queues leading to out-of-memory conditions: if it
8530 works, we will soon backport it to earlier release series.
8532 This is the second release candidate in the 0.3.2 series. If we find
8533 no new bugs or regression here, then the first stable 0.3.2 release
8534 will be nearly identical to this.
8536 o Major bugfixes (KIST, scheduler):
8537 - The KIST scheduler did not correctly account for data already
8538 enqueued in each connection's send socket buffer, particularly in
8539 cases when the TCP/IP congestion window was reduced between
8540 scheduler calls. This situation lead to excessive per-connection
8541 buffering in the kernel, and a potential memory DoS. Fixes bug
8542 24665; bugfix on 0.3.2.1-alpha.
8544 o Minor features (geoip):
8545 - Update geoip and geoip6 to the December 6 2017 Maxmind GeoLite2
8548 o Minor bugfixes (hidden service v3):
8549 - Bump hsdir_spread_store parameter from 3 to 4 in order to increase
8550 the probability of reaching a service for a client missing
8551 microdescriptors. Fixes bug 24425; bugfix on 0.3.2.1-alpha.
8553 o Minor bugfixes (memory usage):
8554 - When queuing DESTROY cells on a channel, only queue the circuit-id
8555 and reason fields: not the entire 514-byte cell. This fix should
8556 help mitigate any bugs or attacks that fill up these queues, and
8557 free more RAM for other uses. Fixes bug 24666; bugfix
8560 o Minor bugfixes (scheduler, KIST):
8561 - Use a sane write limit for KISTLite when writing onto a connection
8562 buffer instead of using INT_MAX and shoving as much as it can.
8563 Because the OOM handler cleans up circuit queues, we are better
8564 off at keeping them in that queue instead of the connection's
8565 buffer. Fixes bug 24671; bugfix on 0.3.2.1-alpha.
8568 Changes in version 0.3.2.7-rc - 2017-12-14
8569 Tor 0.3.2.7-rc fixes various bugs in earlier versions of Tor,
8570 including some that could affect reliability or correctness.
8572 This is the first release candidate in the 0.3.2 series. If we find no
8573 new bugs or regression here, then the first stable 0.3.2. release will
8574 be nearly identical to this.
8576 o Major bugfixes (circuit prediction):
8577 - Fix circuit prediction logic so that a client doesn't treat a port
8578 as being "handled" by a circuit if that circuit already has
8579 isolation settings on it. This change should make Tor clients more
8580 responsive by improving their chances of having a pre-created
8581 circuit ready for use when a request arrives. Fixes bug 18859;
8582 bugfix on 0.2.3.3-alpha.
8584 o Minor features (logging):
8585 - Provide better warnings when the getrandom() syscall fails. Closes
8588 o Minor features (portability):
8589 - Tor now compiles correctly on arm64 with libseccomp-dev installed.
8590 (It doesn't yet work with the sandbox enabled.) Closes
8593 o Minor bugfixes (bridge clients, bootstrap):
8594 - Retry directory downloads when we get our first bridge descriptor
8595 during bootstrap or while reconnecting to the network. Keep
8596 retrying every time we get a bridge descriptor, until we have a
8597 reachable bridge. Fixes part of bug 24367; bugfix on 0.2.0.3-alpha.
8598 - Stop delaying bridge descriptor fetches when we have cached bridge
8599 descriptors. Instead, only delay bridge descriptor fetches when we
8600 have at least one reachable bridge. Fixes part of bug 24367;
8601 bugfix on 0.2.0.3-alpha.
8602 - Stop delaying directory fetches when we have cached bridge
8603 descriptors. Instead, only delay bridge descriptor fetches when
8604 all our bridges are definitely unreachable. Fixes part of bug
8605 24367; bugfix on 0.2.0.3-alpha.
8607 o Minor bugfixes (compilation):
8608 - Fix a signed/unsigned comparison warning introduced by our fix to
8609 TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
8611 o Minor bugfixes (correctness):
8612 - Fix several places in our codebase where a C compiler would be
8613 likely to eliminate a check, based on assuming that undefined
8614 behavior had not happened elsewhere in the code. These cases are
8615 usually a sign of redundant checking or dubious arithmetic. Found
8616 by Georg Koppen using the "STACK" tool from Wang, Zeldovich,
8617 Kaashoek, and Solar-Lezama. Fixes bug 24423; bugfix on various
8620 o Minor bugfixes (onion service v3):
8621 - Fix a race where an onion service would launch a new intro circuit
8622 after closing an old one, but fail to register it before freeing
8623 the previously closed circuit. This bug was making the service
8624 unable to find the established intro circuit and thus not upload
8625 its descriptor, thus making a service unavailable for up to 24
8626 hours. Fixes bug 23603; bugfix on 0.3.2.1-alpha.
8628 o Minor bugfixes (scheduler, KIST):
8629 - Properly set the scheduler state of an unopened channel in the
8630 KIST scheduler main loop. This prevents a harmless but annoying
8631 log warning. Fixes bug 24502; bugfix on 0.3.2.4-alpha.
8632 - Avoid a possible integer overflow when computing the available
8633 space on the TCP buffer of a channel. This had no security
8634 implications; but could make KIST allow too many cells on a
8635 saturated connection. Fixes bug 24590; bugfix on 0.3.2.1-alpha.
8636 - Downgrade to "info" a harmless warning about the monotonic time
8637 moving backwards: This can happen on platform not supporting
8638 monotonic time. Fixes bug 23696; bugfix on 0.3.2.1-alpha.
8641 Changes in version 0.3.2.6-alpha - 2017-12-01
8642 This version of Tor is the latest in the 0.3.2 alpha series. It
8643 includes fixes for several important security issues. All Tor users
8644 should upgrade to this release, or to one of the other releases coming
8647 o Major bugfixes (security):
8648 - Fix a denial of service bug where an attacker could use a
8649 malformed directory object to cause a Tor instance to pause while
8650 OpenSSL would try to read a passphrase from the terminal. (Tor
8651 instances run without a terminal, which is the case for most Tor
8652 packages, are not impacted.) Fixes bug 24246; bugfix on every
8653 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
8654 Found by OSS-Fuzz as testcase 6360145429790720.
8655 - Fix a denial of service issue where an attacker could crash a
8656 directory authority using a malformed router descriptor. Fixes bug
8657 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
8659 - When checking for replays in the INTRODUCE1 cell data for a
8660 (legacy) onion service, correctly detect replays in the RSA-
8661 encrypted part of the cell. We were previously checking for
8662 replays on the entire cell, but those can be circumvented due to
8663 the malleability of Tor's legacy hybrid encryption. This fix helps
8664 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
8665 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
8668 o Major bugfixes (security, onion service v2):
8669 - Fix a use-after-free error that could crash v2 Tor onion services
8670 when they failed to open circuits while expiring introduction
8671 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
8672 also tracked as TROVE-2017-013 and CVE-2017-8823.
8674 o Major bugfixes (security, relay):
8675 - When running as a relay, make sure that we never build a path
8676 through ourselves, even in the case where we have somehow lost the
8677 version of our descriptor appearing in the consensus. Fixes part
8678 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
8679 as TROVE-2017-012 and CVE-2017-8822.
8680 - When running as a relay, make sure that we never choose ourselves
8681 as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
8682 issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
8684 o Minor feature (relay statistics):
8685 - Change relay bandwidth reporting stats interval from 4 hours to 24
8686 hours in order to reduce the efficiency of guard discovery
8687 attacks. Fixes ticket 23856.
8689 o Minor features (directory authority):
8690 - Add an IPv6 address for the "bastet" directory authority. Closes
8693 o Minor bugfixes (client):
8694 - By default, do not enable storage of client-side DNS values. These
8695 values were unused by default previously, but they should not have
8696 been cached at all. Fixes bug 24050; bugfix on 0.2.6.3-alpha.
8699 Changes in version 0.3.1.9 - 2017-12-01:
8700 Tor 0.3.1.9 backports important security and stability fixes from the
8701 0.3.2 development series. All Tor users should upgrade to this
8702 release, or to another of the releases coming out today.
8704 o Major bugfixes (security, backport from 0.3.2.6-alpha):
8705 - Fix a denial of service bug where an attacker could use a
8706 malformed directory object to cause a Tor instance to pause while
8707 OpenSSL would try to read a passphrase from the terminal. (Tor
8708 instances run without a terminal, which is the case for most Tor
8709 packages, are not impacted.) Fixes bug 24246; bugfix on every
8710 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
8711 Found by OSS-Fuzz as testcase 6360145429790720.
8712 - Fix a denial of service issue where an attacker could crash a
8713 directory authority using a malformed router descriptor. Fixes bug
8714 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
8716 - When checking for replays in the INTRODUCE1 cell data for a
8717 (legacy) onion service, correctly detect replays in the RSA-
8718 encrypted part of the cell. We were previously checking for
8719 replays on the entire cell, but those can be circumvented due to
8720 the malleability of Tor's legacy hybrid encryption. This fix helps
8721 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
8722 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
8725 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
8726 - Fix a use-after-free error that could crash v2 Tor onion services
8727 when they failed to open circuits while expiring introduction
8728 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
8729 also tracked as TROVE-2017-013 and CVE-2017-8823.
8731 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
8732 - When running as a relay, make sure that we never build a path
8733 through ourselves, even in the case where we have somehow lost the
8734 version of our descriptor appearing in the consensus. Fixes part
8735 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
8736 as TROVE-2017-012 and CVE-2017-8822.
8737 - When running as a relay, make sure that we never choose ourselves
8738 as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
8739 issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
8741 o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
8742 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
8743 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
8744 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
8745 identifying and finding a workaround to this bug and to Moritz,
8746 Arthur Edelstein, and Roger for helping to track it down and
8749 o Minor features (bridge):
8750 - Bridges now include notice in their descriptors that they are
8751 bridges, and notice of their distribution status, based on their
8752 publication settings. Implements ticket 18329. For more fine-
8753 grained control of how a bridge is distributed, upgrade to 0.3.2.x
8756 o Minor features (directory authority, backport from 0.3.2.6-alpha):
8757 - Add an IPv6 address for the "bastet" directory authority. Closes
8760 o Minor features (geoip):
8761 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
8764 o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
8765 - Avoid unnecessary calls to directory_fetches_from_authorities() on
8766 relays, to prevent spurious address resolutions and descriptor
8767 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
8768 bugfix on in 0.2.8.1-alpha.
8770 o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
8771 - Fix unused variable warnings in donna's Curve25519 SSE2 code.
8772 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
8774 o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
8775 - When a circuit is marked for close, do not attempt to package any
8776 cells for channels on that circuit. Previously, we would detect
8777 this condition lower in the call stack, when we noticed that the
8778 circuit had no attached channel, and log an annoying message.
8779 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
8781 o Minor bugfixes (onion service, backport from 0.3.2.5-alpha):
8782 - Rename the consensus parameter "hsdir-interval" to "hsdir_interval"
8783 so it matches dir-spec.txt. Fixes bug 24262; bugfix
8786 o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
8787 - Avoid a crash when transitioning from client mode to bridge mode.
8788 Previously, we would launch the worker threads whenever our
8789 "public server" mode changed, but not when our "server" mode
8790 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
8793 Changes in version 0.3.0.13 - 2017-12-01
8794 Tor 0.3.0.13 backports important security and stability bugfixes from
8795 later Tor releases. All Tor users should upgrade to this release, or
8796 to another of the releases coming out today.
8798 Note: the Tor 0.3.0 series will no longer be supported after 26 Jan
8799 2018. If you need a release with long-term support, please stick with
8800 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
8802 o Major bugfixes (security, backport from 0.3.2.6-alpha):
8803 - Fix a denial of service bug where an attacker could use a
8804 malformed directory object to cause a Tor instance to pause while
8805 OpenSSL would try to read a passphrase from the terminal. (Tor
8806 instances run without a terminal, which is the case for most Tor
8807 packages, are not impacted.) Fixes bug 24246; bugfix on every
8808 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
8809 Found by OSS-Fuzz as testcase 6360145429790720.
8810 - Fix a denial of service issue where an attacker could crash a
8811 directory authority using a malformed router descriptor. Fixes bug
8812 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
8814 - When checking for replays in the INTRODUCE1 cell data for a
8815 (legacy) onion service, correctly detect replays in the RSA-
8816 encrypted part of the cell. We were previously checking for
8817 replays on the entire cell, but those can be circumvented due to
8818 the malleability of Tor's legacy hybrid encryption. This fix helps
8819 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
8820 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
8823 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
8824 - Fix a use-after-free error that could crash v2 Tor onion services
8825 when they failed to open circuits while expiring introduction
8826 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
8827 also tracked as TROVE-2017-013 and CVE-2017-8823.
8829 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
8830 - When running as a relay, make sure that we never build a path
8831 through ourselves, even in the case where we have somehow lost the
8832 version of our descriptor appearing in the consensus. Fixes part
8833 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
8834 as TROVE-2017-012 and CVE-2017-8822.
8835 - When running as a relay, make sure that we never choose ourselves
8836 as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
8837 issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
8839 o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
8840 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
8841 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
8842 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
8843 identifying and finding a workaround to this bug and to Moritz,
8844 Arthur Edelstein, and Roger for helping to track it down and
8847 o Minor features (security, windows, backport from 0.3.1.1-alpha):
8848 - Enable a couple of pieces of Windows hardening: one
8849 (HeapEnableTerminationOnCorruption) that has been on-by-default
8850 since Windows 8, and unavailable before Windows 7; and one
8851 (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
8852 affect us, but shouldn't do any harm. Closes ticket 21953.
8854 o Minor features (bridge, backport from 0.3.1.9):
8855 - Bridges now include notice in their descriptors that they are
8856 bridges, and notice of their distribution status, based on their
8857 publication settings. Implements ticket 18329. For more fine-
8858 grained control of how a bridge is distributed, upgrade to 0.3.2.x
8861 o Minor features (directory authority, backport from 0.3.2.6-alpha):
8862 - Add an IPv6 address for the "bastet" directory authority. Closes
8865 o Minor features (geoip):
8866 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
8869 o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
8870 - Avoid unnecessary calls to directory_fetches_from_authorities() on
8871 relays, to prevent spurious address resolutions and descriptor
8872 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
8873 bugfix on in 0.2.8.1-alpha.
8875 o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
8876 - Fix unused variable warnings in donna's Curve25519 SSE2 code.
8877 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
8879 o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
8880 - When a circuit is marked for close, do not attempt to package any
8881 cells for channels on that circuit. Previously, we would detect
8882 this condition lower in the call stack, when we noticed that the
8883 circuit had no attached channel, and log an annoying message.
8884 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
8886 o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
8887 - Avoid a crash when transitioning from client mode to bridge mode.
8888 Previously, we would launch the worker threads whenever our
8889 "public server" mode changed, but not when our "server" mode
8890 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
8892 o Minor bugfixes (testing, backport from 0.3.1.6-rc):
8893 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
8894 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
8897 Changes in version 0.2.9.14 - 2017-12-01
8898 Tor 0.3.0.13 backports important security and stability bugfixes from
8899 later Tor releases. All Tor users should upgrade to this release, or
8900 to another of the releases coming out today.
8902 o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
8903 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
8904 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
8905 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
8906 identifying and finding a workaround to this bug and to Moritz,
8907 Arthur Edelstein, and Roger for helping to track it down and
8910 o Major bugfixes (security, backport from 0.3.2.6-alpha):
8911 - Fix a denial of service bug where an attacker could use a
8912 malformed directory object to cause a Tor instance to pause while
8913 OpenSSL would try to read a passphrase from the terminal. (Tor
8914 instances run without a terminal, which is the case for most Tor
8915 packages, are not impacted.) Fixes bug 24246; bugfix on every
8916 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
8917 Found by OSS-Fuzz as testcase 6360145429790720.
8918 - Fix a denial of service issue where an attacker could crash a
8919 directory authority using a malformed router descriptor. Fixes bug
8920 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
8922 - When checking for replays in the INTRODUCE1 cell data for a
8923 (legacy) onion service, correctly detect replays in the RSA-
8924 encrypted part of the cell. We were previously checking for
8925 replays on the entire cell, but those can be circumvented due to
8926 the malleability of Tor's legacy hybrid encryption. This fix helps
8927 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
8928 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
8931 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
8932 - Fix a use-after-free error that could crash v2 Tor onion services
8933 when they failed to open circuits while expiring introduction
8934 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
8935 also tracked as TROVE-2017-013 and CVE-2017-8823.
8937 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
8938 - When running as a relay, make sure that we never build a path
8939 through ourselves, even in the case where we have somehow lost the
8940 version of our descriptor appearing in the consensus. Fixes part
8941 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
8942 as TROVE-2017-012 and CVE-2017-8822.
8944 o Minor features (bridge, backport from 0.3.1.9):
8945 - Bridges now include notice in their descriptors that they are
8946 bridges, and notice of their distribution status, based on their
8947 publication settings. Implements ticket 18329. For more fine-
8948 grained control of how a bridge is distributed, upgrade to 0.3.2.x
8951 o Minor features (directory authority, backport from 0.3.2.6-alpha):
8952 - Add an IPv6 address for the "bastet" directory authority. Closes
8955 o Minor features (geoip):
8956 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
8959 o Minor features (security, windows, backport from 0.3.1.1-alpha):
8960 - Enable a couple of pieces of Windows hardening: one
8961 (HeapEnableTerminationOnCorruption) that has been on-by-default
8962 since Windows 8, and unavailable before Windows 7; and one
8963 (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
8964 affect us, but shouldn't do any harm. Closes ticket 21953.
8966 o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
8967 - Avoid unnecessary calls to directory_fetches_from_authorities() on
8968 relays, to prevent spurious address resolutions and descriptor
8969 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
8970 bugfix on in 0.2.8.1-alpha.
8972 o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
8973 - Fix unused variable warnings in donna's Curve25519 SSE2 code.
8974 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
8976 o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
8977 - When a circuit is marked for close, do not attempt to package any
8978 cells for channels on that circuit. Previously, we would detect
8979 this condition lower in the call stack, when we noticed that the
8980 circuit had no attached channel, and log an annoying message.
8981 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
8983 o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
8984 - Avoid a crash when transitioning from client mode to bridge mode.
8985 Previously, we would launch the worker threads whenever our
8986 "public server" mode changed, but not when our "server" mode
8987 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
8989 o Minor bugfixes (testing, backport from 0.3.1.6-rc):
8990 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
8991 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
8994 Changes in version 0.2.8.17 - 2017-12-01
8995 Tor 0.2.8.17 backports important security and stability bugfixes from
8996 later Tor releases. All Tor users should upgrade to this release, or
8997 to another of the releases coming out today.
8999 Note: the Tor 0.2.8 series will no longer be supported after 1 Jan
9000 2018. If you need a release with long-term support, please upgrade with
9001 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
9003 o Major bugfixes (security, backport from 0.3.2.6-alpha):
9004 - Fix a denial of service bug where an attacker could use a
9005 malformed directory object to cause a Tor instance to pause while
9006 OpenSSL would try to read a passphrase from the terminal. (Tor
9007 instances run without a terminal, which is the case for most Tor
9008 packages, are not impacted.) Fixes bug 24246; bugfix on every
9009 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
9010 Found by OSS-Fuzz as testcase 6360145429790720.
9011 - When checking for replays in the INTRODUCE1 cell data for a
9012 (legacy) onion service, correctly detect replays in the RSA-
9013 encrypted part of the cell. We were previously checking for
9014 replays on the entire cell, but those can be circumvented due to
9015 the malleability of Tor's legacy hybrid encryption. This fix helps
9016 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
9017 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
9020 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
9021 - Fix a use-after-free error that could crash v2 Tor onion services
9022 when they failed to open circuits while expiring introduction
9023 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
9024 also tracked as TROVE-2017-013 and CVE-2017-8823.
9026 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
9027 - When running as a relay, make sure that we never build a path through
9028 ourselves, even in the case where we have somehow lost the version of
9029 our descriptor appearing in the consensus. Fixes part of bug 21534;
9030 bugfix on 0.2.0.1-alpha. This issue is also tracked as TROVE-2017-012
9033 o Minor features (bridge, backport from 0.3.1.9):
9034 - Bridges now include notice in their descriptors that they are
9035 bridges, and notice of their distribution status, based on their
9036 publication settings. Implements ticket 18329. For more fine-
9037 grained control of how a bridge is distributed, upgrade to 0.3.2.x
9040 o Minor features (directory authority, backport from 0.3.2.6-alpha):
9041 - Add an IPv6 address for the "bastet" directory authority. Closes
9044 o Minor features (geoip):
9045 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
9048 o Minor bugfixes (testing, backport from 0.3.1.6-rc):
9049 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
9050 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
9053 Changes in version 0.2.5.16 - 2017-12-01
9054 Tor 0.2.5.13 backports important security and stability bugfixes from
9055 later Tor releases. All Tor users should upgrade to this release, or
9056 to another of the releases coming out today.
9058 Note: the Tor 0.2.5 series will no longer be supported after 1 May
9059 2018. If you need a release with long-term support, please upgrade to
9060 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
9062 o Major bugfixes (security, backport from 0.3.2.6-alpha):
9063 - Fix a denial of service bug where an attacker could use a
9064 malformed directory object to cause a Tor instance to pause while
9065 OpenSSL would try to read a passphrase from the terminal. (Tor
9066 instances run without a terminal, which is the case for most Tor
9067 packages, are not impacted.) Fixes bug 24246; bugfix on every
9068 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
9069 Found by OSS-Fuzz as testcase 6360145429790720.
9070 - When checking for replays in the INTRODUCE1 cell data for a
9071 (legacy) onion service, correctly detect replays in the RSA-
9072 encrypted part of the cell. We were previously checking for
9073 replays on the entire cell, but those can be circumvented due to
9074 the malleability of Tor's legacy hybrid encryption. This fix helps
9075 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
9076 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
9079 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
9080 - When running as a relay, make sure that we never build a path
9081 through ourselves, even in the case where we have somehow lost the
9082 version of our descriptor appearing in the consensus. Fixes part
9083 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
9084 as TROVE-2017-012 and CVE-2017-8822.
9086 o Minor features (bridge, backport from 0.3.1.9):
9087 - Bridges now include notice in their descriptors that they are
9088 bridges, and notice of their distribution status, based on their
9089 publication settings. Implements ticket 18329. For more fine-
9090 grained control of how a bridge is distributed, upgrade to 0.3.2.x
9093 o Minor features (geoip):
9094 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
9098 Changes in version 0.3.2.5-alpha - 2017-11-22
9099 Tor 0.3.2.5-alpha is the fifth alpha release in the 0.3.2.x series. It
9100 fixes several stability and reliability bugs, including a fix for
9101 intermittent bootstrapping failures that some people have been seeing
9102 since the 0.3.0.x series.
9104 Please test this alpha out -- many of these fixes will soon be
9105 backported to stable Tor versions if no additional bugs are found
9108 o Major bugfixes (bootstrapping):
9109 - Fetch descriptors aggressively whenever we lack enough to build
9110 circuits, regardless of how many descriptors we are missing.
9111 Previously, we would delay launching the fetch when we had fewer
9112 than 15 missing descriptors, even if some of those descriptors
9113 were blocking circuits from building. Fixes bug 23985; bugfix on
9114 0.1.1.11-alpha. The effects of this bug became worse in
9115 0.3.0.3-alpha, when we began treating missing descriptors from our
9116 primary guards as a reason to delay circuits.
9117 - Don't try fetching microdescriptors from relays that have failed
9118 to deliver them in the past. Fixes bug 23817; bugfix
9121 o Minor features (directory authority):
9122 - Make the "Exit" flag assignment only depend on whether the exit
9123 policy allows connections to ports 80 and 443. Previously relays
9124 would get the Exit flag if they allowed connections to one of
9125 these ports and also port 6667. Resolves ticket 23637.
9127 o Minor features (geoip):
9128 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
9131 o Minor features (linux seccomp2 sandbox):
9132 - Update the sandbox rules so that they should now work correctly
9133 with Glibc 2.26. Closes ticket 24315.
9135 o Minor features (logging):
9136 - Downgrade a pair of log messages that could occur when an exit's
9137 resolver gave us an unusual (but not forbidden) response. Closes
9139 - Improve the message we log when re-enabling circuit build timeouts
9140 after having received a consensus. Closes ticket 20963.
9142 o Minor bugfixes (compilation):
9143 - Fix a memory leak warning in one of the libevent-related
9144 configuration tests that could occur when manually specifying
9145 -fsanitize=address. Fixes bug 24279; bugfix on 0.3.0.2-alpha.
9146 Found and patched by Alex Xu.
9147 - When detecting OpenSSL on Windows from our configure script, make
9148 sure to try linking with the ws2_32 library. Fixes bug 23783;
9149 bugfix on 0.3.2.2-alpha.
9151 o Minor bugfixes (control port, linux seccomp2 sandbox):
9152 - Avoid a crash when attempting to use the seccomp2 sandbox together
9153 with the OwningControllerProcess feature. Fixes bug 24198; bugfix
9156 o Minor bugfixes (control port, onion services):
9157 - Report "FAILED" instead of "UPLOAD_FAILED" "FAILED" for the
9158 HS_DESC event when a service is not able to upload a descriptor.
9159 Fixes bug 24230; bugfix on 0.2.7.1-alpha.
9161 o Minor bugfixes (directory cache):
9162 - Recover better from empty or corrupt files in the consensus cache
9163 directory. Fixes bug 24099; bugfix on 0.3.1.1-alpha.
9164 - When a consensus diff calculation is only partially successful,
9165 only record the successful parts as having succeeded. Partial
9166 success can happen if (for example) one compression method fails
9167 but the others succeed. Previously we misrecorded all the
9168 calculations as having succeeded, which would later cause a
9169 nonfatal assertion failure. Fixes bug 24086; bugfix
9172 o Minor bugfixes (logging):
9173 - Only log once if we notice that KIST support is gone. Fixes bug
9174 24158; bugfix on 0.3.2.1-alpha.
9175 - Suppress a log notice when relay descriptors arrive. We already
9176 have a bootstrap progress for this so no need to log notice
9177 everytime tor receives relay descriptors. Microdescriptors behave
9178 the same. Fixes bug 23861; bugfix on 0.2.8.2-alpha.
9180 o Minor bugfixes (network layer):
9181 - When closing a connection via close_connection_immediately(), we
9182 mark it as "not blocked on bandwidth", to prevent later calls from
9183 trying to unblock it, and give it permission to read. This fixes a
9184 backtrace warning that can happen on relays under various
9185 circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
9187 o Minor bugfixes (onion services):
9188 - The introduction circuit was being timed out too quickly while
9189 waiting for the rendezvous circuit to complete. Keep the intro
9190 circuit around longer instead of timing out and reopening new ones
9191 constantly. Fixes bug 23681; bugfix on 0.2.4.8-alpha.
9192 - Rename the consensus parameter "hsdir-interval" to "hsdir_interval"
9193 so it matches dir-spec.txt. Fixes bug 24262; bugfix
9195 - Silence a warning about failed v3 onion descriptor uploads that
9196 can happen naturally under certain edge cases. Fixes part of bug
9197 23662; bugfix on 0.3.2.1-alpha.
9199 o Minor bugfixes (tests):
9200 - Fix a memory leak in one of the bridge-distribution test cases.
9201 Fixes bug 24345; bugfix on 0.3.2.3-alpha.
9202 - Fix a bug in our fuzzing mock replacement for crypto_pk_checksig(),
9203 to correctly handle cases where a caller gives it an RSA key of
9204 under 160 bits. (This is not actually a bug in Tor itself, but
9205 rather in our fuzzing code.) Fixes bug 24247; bugfix on
9206 0.3.0.3-alpha. Found by OSS-Fuzz as issue 4177.
9209 - Add notes in man page regarding OS support for the various
9210 scheduler types. Attempt to use less jargon in the scheduler
9211 section. Closes ticket 24254.
9214 Changes in version 0.3.2.4-alpha - 2017-11-08
9215 Tor 0.3.2.4-alpha is the fourth alpha release in the 0.3.2.x series.
9216 It fixes several stability and reliability bugs, especially including
9217 a major reliability issue that has been plaguing fast exit relays in
9220 o Major bugfixes (exit relays, DNS):
9221 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
9222 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
9223 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
9224 identifying and finding a workaround to this bug and to Moritz,
9225 Arthur Edelstein, and Roger for helping to track it down and
9228 o Major bugfixes (scheduler, channel):
9229 - Stop processing scheduled channels if they closed while flushing
9230 cells. This can happen if the write on the connection fails
9231 leading to the channel being closed while in the scheduler loop.
9232 Fixes bug 23751; bugfix on 0.3.2.1-alpha.
9234 o Minor features (logging, scheduler):
9235 - Introduce a SCHED_BUG() function to log extra information about
9236 the scheduler state if we ever catch a bug in the scheduler.
9237 Closes ticket 23753.
9239 o Minor features (removed deprecations):
9240 - The ClientDNSRejectInternalAddresses flag can once again be set in
9241 non-testing Tor networks, so long as they do not use the default
9242 directory authorities. This change also removes the deprecation of
9243 this flag from 0.2.9.2-alpha. Closes ticket 21031.
9245 o Minor features (testing):
9246 - Our fuzzing tests now test the encrypted portions of v3 onion
9247 service descriptors. Implements more of 21509.
9249 o Minor bugfixes (directory client):
9250 - On failure to download directory information, delay retry attempts
9251 by a random amount based on the "decorrelated jitter" algorithm.
9252 Our previous delay algorithm tended to produce extra-long delays
9253 too easily. Fixes bug 23816; bugfix on 0.2.9.1-alpha.
9255 o Minor bugfixes (IPv6, v3 single onion services):
9256 - Remove buggy code for IPv6-only v3 single onion services, and
9257 reject attempts to configure them. This release supports IPv4,
9258 dual-stack, and IPv6-only v3 onion services; and IPv4 and dual-
9259 stack v3 single onion services. Fixes bug 23820; bugfix
9262 o Minor bugfixes (logging, relay):
9263 - Give only a protocol warning when the ed25519 key is not
9264 consistent between the descriptor and microdescriptor of a relay.
9265 This can happen, for instance, if the relay has been flagged
9266 NoEdConsensus. Fixes bug 24025; bugfix on 0.3.2.1-alpha.
9268 o Minor bugfixes (manpage, onion service):
9269 - Document that the HiddenServiceNumIntroductionPoints option is
9270 0-10 for v2 services and 0-20 for v3 services. Fixes bug 24115;
9271 bugfix on 0.3.2.1-alpha.
9273 o Minor bugfixes (memory leaks):
9274 - Fix a minor memory leak at exit in the KIST scheduler. This bug
9275 should have no user-visible impact. Fixes bug 23774; bugfix
9277 - Fix a memory leak when decrypting a badly formatted v3 onion
9278 service descriptor. Fixes bug 24150; bugfix on 0.3.2.1-alpha.
9279 Found by OSS-Fuzz; this is OSS-Fuzz issue 3994.
9281 o Minor bugfixes (onion services):
9282 - Cache some needed onion service client information instead of
9283 constantly computing it over and over again. Fixes bug 23623;
9284 bugfix on 0.3.2.1-alpha.
9285 - Properly retry HSv3 descriptor fetches when missing required
9286 directory information. Fixes bug 23762; bugfix on 0.3.2.1-alpha.
9288 o Minor bugfixes (path selection):
9289 - When selecting relays by bandwidth, avoid a rounding error that
9290 could sometimes cause load to be imbalanced incorrectly.
9291 Previously, we would always round upwards; now, we round towards
9292 the nearest integer. This had the biggest effect when a relay's
9293 weight adjustments should have given it weight 0, but it got
9294 weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
9295 - When calculating the fraction of nodes that have descriptors, and
9296 all nodes in the network have zero bandwidths, count the number of
9297 nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
9298 - Actually log the total bandwidth in compute_weighted_bandwidths().
9299 Fixes bug 24170; bugfix on 0.2.4.3-alpha.
9301 o Minor bugfixes (relay, crash):
9302 - Avoid a crash when transitioning from client mode to bridge mode.
9303 Previously, we would launch the worker threads whenever our
9304 "public server" mode changed, but not when our "server" mode
9305 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
9307 o Minor bugfixes (testing):
9308 - Fix a spurious fuzzing-only use of an uninitialized value. Found
9309 by Brian Carpenter. Fixes bug 24082; bugfix on 0.3.0.3-alpha.
9310 - Test that IPv6-only clients can use microdescriptors when running
9311 "make test-network-all". Requires chutney master 61c28b9 or later.
9312 Closes ticket 24109.
9315 Changes in version 0.3.2.3-alpha - 2017-10-27
9316 Tor 0.3.2.3-alpha is the third release in the 0.3.2 series. It fixes
9317 numerous small bugs in earlier versions of 0.3.2.x, and adds a new
9318 directory authority, Bastet.
9320 o Directory authority changes:
9321 - Add "Bastet" as a ninth directory authority to the default list.
9322 Closes ticket 23910.
9323 - The directory authority "Longclaw" has changed its IP address.
9324 Closes ticket 23592.
9326 o Minor features (bridge):
9327 - Bridge relays can now set the BridgeDistribution config option to
9328 add a "bridge-distribution-request" line to their bridge
9329 descriptor, which tells BridgeDB how they'd like their bridge
9330 address to be given out. (Note that as of Oct 2017, BridgeDB does
9331 not yet implement this feature.) As a side benefit, this feature
9332 provides a way to distinguish bridge descriptors from non-bridge
9333 descriptors. Implements tickets 18329.
9335 o Minor features (client, entry guards):
9336 - Improve log messages when missing descriptors for primary guards.
9337 Resolves ticket 23670.
9339 o Minor features (geoip):
9340 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
9343 o Minor bugfixes (bridge):
9344 - Overwrite the bridge address earlier in the process of retrieving
9345 its descriptor, to make sure we reach it on the configured
9346 address. Fixes bug 20532; bugfix on 0.2.0.10-alpha.
9348 o Minor bugfixes (documentation):
9349 - Document better how to read gcov, and what our gcov postprocessing
9350 scripts do. Fixes bug 23739; bugfix on 0.2.9.1-alpha.
9352 o Minor bugfixes (entry guards):
9353 - Tor now updates its guard state when it reads a consensus
9354 regardless of whether it's missing descriptors. That makes tor use
9355 its primary guards to fetch descriptors in some edge cases where
9356 it would previously have used fallback directories. Fixes bug
9357 23862; bugfix on 0.3.0.1-alpha.
9359 o Minor bugfixes (hidden service client):
9360 - When handling multiple SOCKS request for the same .onion address,
9361 only fetch the service descriptor once.
9362 - When a descriptor fetch fails with a non-recoverable error, close
9363 all pending SOCKS requests for that .onion. Fixes bug 23653;
9364 bugfix on 0.3.2.1-alpha.
9366 o Minor bugfixes (hidden service):
9367 - Always regenerate missing hidden service public key files. Prior
9368 to this, if the public key was deleted from disk, it wouldn't get
9369 recreated. Fixes bug 23748; bugfix on 0.3.2.2-alpha. Patch
9371 - Make sure that we have a usable ed25519 key when the intro point
9372 relay supports ed25519 link authentication. Fixes bug 24002;
9373 bugfix on 0.3.2.1-alpha.
9375 o Minor bugfixes (hidden service, v2):
9376 - When reloading configured hidden services, copy all information
9377 from the old service object. Previously, some data was omitted,
9378 causing delays in descriptor upload, and other bugs. Fixes bug
9379 23790; bugfix on 0.2.1.9-alpha.
9381 o Minor bugfixes (memory safety, defensive programming):
9382 - Clear the target address when node_get_prim_orport() returns
9383 early. Fixes bug 23874; bugfix on 0.2.8.2-alpha.
9385 o Minor bugfixes (relay):
9386 - Avoid a BUG warning when receiving a dubious CREATE cell while an
9387 option transition is in progress. Fixes bug 23952; bugfix
9390 o Minor bugfixes (testing):
9391 - Adjust the GitLab CI configuration to more closely match that of
9392 Travis CI. Fixes bug 23757; bugfix on 0.3.2.2-alpha.
9393 - Prevent scripts/test/coverage from attempting to move gcov output
9394 to the root directory. Fixes bug 23741; bugfix on 0.2.5.1-alpha.
9395 - When running unit tests as root, skip a test that would fail
9396 because it expects a permissions error. This affects some
9397 continuous integration setups. Fixes bug 23758; bugfix
9399 - Stop unconditionally mirroring the tor repository in GitLab CI.
9400 This prevented developers from enabling GitLab CI on master. Fixes
9401 bug 23755; bugfix on 0.3.2.2-alpha.
9402 - Fix the hidden service v3 descriptor decoding fuzzing to use the
9403 latest decoding API correctly. Fixes bug 21509; bugfix
9406 o Minor bugfixes (warnings):
9407 - When we get an HTTP request on a SOCKS port, tell the user about
9408 the new HTTPTunnelPort option. Previously, we would give a "Tor is
9409 not an HTTP Proxy" message, which stopped being true when
9410 HTTPTunnelPort was introduced. Fixes bug 23678; bugfix
9414 Changes in version 0.2.5.15 - 2017-10-25
9415 Tor 0.2.5.15 backports a collection of bugfixes from later Tor release
9416 series. It also adds a new directory authority, Bastet.
9418 Note: the Tor 0.2.5 series will no longer be supported after 1 May
9419 2018. If you need a release with long-term support, please upgrade to
9420 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
9422 o Directory authority changes:
9423 - Add "Bastet" as a ninth directory authority to the default list.
9424 Closes ticket 23910.
9425 - The directory authority "Longclaw" has changed its IP address.
9426 Closes ticket 23592.
9428 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
9429 - Avoid an assertion failure bug affecting our implementation of
9430 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
9431 handling of "0xx" differs from what we had expected. Fixes bug
9432 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
9434 o Minor features (geoip):
9435 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
9438 o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
9439 - Fix a memset() off the end of an array when packing cells. This
9440 bug should be harmless in practice, since the corrupted bytes are
9441 still in the same structure, and are always padding bytes,
9442 ignored, or immediately overwritten, depending on compiler
9443 behavior. Nevertheless, because the memset()'s purpose is to make
9444 sure that any other cell-handling bugs can't expose bytes to the
9445 network, we need to fix it. Fixes bug 22737; bugfix on
9446 0.2.4.11-alpha. Fixes CID 1401591.
9448 o Build features (backport from 0.3.1.5-alpha):
9449 - Tor's repository now includes a Travis Continuous Integration (CI)
9450 configuration file (.travis.yml). This is meant to help new
9451 developers and contributors who fork Tor to a Github repository be
9452 better able to test their changes, and understand what we expect
9453 to pass. To use this new build feature, you must fork Tor to your
9454 Github account, then go into the "Integrations" menu in the
9455 repository settings for your fork and enable Travis, then push
9456 your changes. Closes ticket 22636.
9459 Changes in version 0.2.8.16 - 2017-10-25
9460 Tor 0.2.8.16 backports a collection of bugfixes from later Tor release
9461 series, including a bugfix for a crash issue that had affected relays
9462 under memory pressure. It also adds a new directory authority, Bastet.
9464 Note: the Tor 0.2.8 series will no longer be supported after 1 Jan
9465 2018. If you need a release with long-term support, please stick with
9466 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
9468 o Directory authority changes:
9469 - Add "Bastet" as a ninth directory authority to the default list.
9470 Closes ticket 23910.
9471 - The directory authority "Longclaw" has changed its IP address.
9472 Closes ticket 23592.
9474 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
9475 - Fix a timing-based assertion failure that could occur when the
9476 circuit out-of-memory handler freed a connection's output buffer.
9477 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
9479 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
9480 - Remove longclaw's IPv6 address, as it will soon change. Authority
9481 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
9482 3/8 directory authorities with IPv6 addresses, but there are also
9483 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
9485 o Minor features (geoip):
9486 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
9490 Changes in version 0.2.9.13 - 2017-10-25
9491 Tor 0.2.9.13 backports a collection of bugfixes from later Tor release
9492 series, including a bugfix for a crash issue that had affected relays
9493 under memory pressure. It also adds a new directory authority, Bastet.
9495 o Directory authority changes:
9496 - Add "Bastet" as a ninth directory authority to the default list.
9497 Closes ticket 23910.
9498 - The directory authority "Longclaw" has changed its IP address.
9499 Closes ticket 23592.
9501 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
9502 - Fix a timing-based assertion failure that could occur when the
9503 circuit out-of-memory handler freed a connection's output buffer.
9504 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
9506 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
9507 - Remove longclaw's IPv6 address, as it will soon change. Authority
9508 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
9509 3/8 directory authorities with IPv6 addresses, but there are also
9510 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
9512 o Minor features (geoip):
9513 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
9516 o Minor bugfixes (directory authority, backport from 0.3.1.5-alpha):
9517 - When a directory authority rejects a descriptor or extrainfo with
9518 a given digest, mark that digest as undownloadable, so that we do
9519 not attempt to download it again over and over. We previously
9520 tried to avoid downloading such descriptors by other means, but we
9521 didn't notice if we accidentally downloaded one anyway. This
9522 behavior became problematic in 0.2.7.2-alpha, when authorities
9523 began pinning Ed25519 keys. Fixes bug 22349; bugfix
9526 o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
9527 - Clear the address when node_get_prim_orport() returns early.
9528 Fixes bug 23874; bugfix on 0.2.8.2-alpha.
9530 o Minor bugfixes (Windows service, backport from 0.3.1.6-rc):
9531 - When running as a Windows service, set the ID of the main thread
9532 correctly. Failure to do so made us fail to send log messages to
9533 the controller in 0.2.1.16-rc, slowed down controller event
9534 delivery in 0.2.7.3-rc and later, and crash with an assertion
9535 failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
9536 Patch and diagnosis from "Vort".
9539 Changes in version 0.3.0.12 - 2017-10-25
9540 Tor 0.3.0.12 backports a collection of bugfixes from later Tor release
9541 series, including a bugfix for a crash issue that had affected relays
9542 under memory pressure. It also adds a new directory authority, Bastet.
9544 Note: the Tor 0.3.0 series will no longer be supported after 26 Jan
9545 2018. If you need a release with long-term support, please stick with
9546 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
9548 o Directory authority changes:
9549 - Add "Bastet" as a ninth directory authority to the default list.
9550 Closes ticket 23910.
9551 - The directory authority "Longclaw" has changed its IP address.
9552 Closes ticket 23592.
9554 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
9555 - Fix a timing-based assertion failure that could occur when the
9556 circuit out-of-memory handler freed a connection's output buffer.
9557 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
9559 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
9560 - Remove longclaw's IPv6 address, as it will soon change. Authority
9561 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
9562 3/8 directory authorities with IPv6 addresses, but there are also
9563 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
9565 o Minor features (geoip):
9566 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
9569 o Minor bugfixes (directory authority, backport from 0.3.1.5-alpha):
9570 - When a directory authority rejects a descriptor or extrainfo with
9571 a given digest, mark that digest as undownloadable, so that we do
9572 not attempt to download it again over and over. We previously
9573 tried to avoid downloading such descriptors by other means, but we
9574 didn't notice if we accidentally downloaded one anyway. This
9575 behavior became problematic in 0.2.7.2-alpha, when authorities
9576 began pinning Ed25519 keys. Fixes bug 22349; bugfix
9579 o Minor bugfixes (hidden service, relay, backport from 0.3.2.2-alpha):
9580 - Avoid a possible double close of a circuit by the intro point on
9581 error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
9582 bugfix on 0.3.0.1-alpha.
9584 o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
9585 - Clear the address when node_get_prim_orport() returns early.
9586 Fixes bug 23874; bugfix on 0.2.8.2-alpha.
9588 o Minor bugfixes (Windows service, backport from 0.3.1.6-rc):
9589 - When running as a Windows service, set the ID of the main thread
9590 correctly. Failure to do so made us fail to send log messages to
9591 the controller in 0.2.1.16-rc, slowed down controller event
9592 delivery in 0.2.7.3-rc and later, and crash with an assertion
9593 failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
9594 Patch and diagnosis from "Vort".
9597 Changes in version 0.3.1.8 - 2017-10-25
9598 Tor 0.3.1.8 is the second stable release in the 0.3.1 series.
9599 It includes several bugfixes, including a bugfix for a crash issue
9600 that had affected relays under memory pressure. It also adds
9601 a new directory authority, Bastet.
9603 o Directory authority changes:
9604 - Add "Bastet" as a ninth directory authority to the default list.
9605 Closes ticket 23910.
9606 - The directory authority "Longclaw" has changed its IP address.
9607 Closes ticket 23592.
9609 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
9610 - Fix a timing-based assertion failure that could occur when the
9611 circuit out-of-memory handler freed a connection's output buffer.
9612 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
9614 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
9615 - Remove longclaw's IPv6 address, as it will soon change. Authority
9616 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
9617 3/8 directory authorities with IPv6 addresses, but there are also
9618 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
9620 o Minor features (geoip):
9621 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
9624 o Minor bugfixes (compilation, backport from 0.3.2.2-alpha):
9625 - Fix a compilation warning when building with zstd support on
9626 32-bit platforms. Fixes bug 23568; bugfix on 0.3.1.1-alpha. Found
9627 and fixed by Andreas Stieger.
9629 o Minor bugfixes (compression, backport from 0.3.2.2-alpha):
9630 - Handle a pathological case when decompressing Zstandard data when
9631 the output buffer size is zero. Fixes bug 23551; bugfix
9634 o Minor bugfixes (directory authority, backport from 0.3.2.1-alpha):
9635 - Remove the length limit on HTTP status lines that authorities can
9636 send in their replies. Fixes bug 23499; bugfix on 0.3.1.6-rc.
9638 o Minor bugfixes (hidden service, relay, backport from 0.3.2.2-alpha):
9639 - Avoid a possible double close of a circuit by the intro point on
9640 error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
9641 bugfix on 0.3.0.1-alpha.
9643 o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
9644 - Clear the address when node_get_prim_orport() returns early.
9645 Fixes bug 23874; bugfix on 0.2.8.2-alpha.
9647 o Minor bugfixes (unit tests, backport from 0.3.2.2-alpha):
9648 - Fix additional channelpadding unit test failures by using mocked
9649 time instead of actual time for all tests. Fixes bug 23608; bugfix
9653 Changes in version 0.3.2.2-alpha - 2017-09-29
9654 Tor 0.3.2.2-alpha is the second release in the 0.3.2 series. This
9655 release fixes several minor bugs in the new scheduler and next-
9656 generation onion services; both features were newly added in the 0.3.2
9657 series. Other fixes in this alpha include several fixes for non-fatal
9658 tracebacks which would appear in logs.
9660 With the aim to stabilise the 0.3.2 series by 15 December 2017, this
9661 alpha does not contain any substantial new features. Minor features
9662 include better testing and logging.
9664 The following comprises the complete list of changes included
9667 o Major bugfixes (relay, crash, assertion failure):
9668 - Fix a timing-based assertion failure that could occur when the
9669 circuit out-of-memory handler freed a connection's output buffer.
9670 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
9672 o Major bugfixes (scheduler):
9673 - If a channel is put into the scheduler's pending list, then it
9674 starts closing, and then if the scheduler runs before it finishes
9675 closing, the scheduler will get stuck trying to flush its cells
9676 while the lower layers refuse to cooperate. Fix that race
9677 condition by giving the scheduler an escape method. Fixes bug
9678 23676; bugfix on 0.3.2.1-alpha.
9680 o Minor features (build, compilation):
9681 - The "check-changes" feature is now part of the "make check" tests;
9682 we'll use it to try to prevent misformed changes files from
9683 accumulating. Closes ticket 23564.
9684 - Tor builds should now fail if there are any mismatches between the
9685 C type representing a configuration variable and the C type the
9686 data-driven parser uses to store a value there. Previously, we
9687 needed to check these by hand, which sometimes led to mistakes.
9688 Closes ticket 23643.
9690 o Minor features (directory authorities):
9691 - Remove longclaw's IPv6 address, as it will soon change. Authority
9692 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
9693 3/8 directory authorities with IPv6 addresses, but there are also
9694 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
9696 o Minor features (hidden service, circuit, logging):
9697 - Improve logging of many callsite in the circuit subsystem to print
9698 the circuit identifier(s).
9699 - Log when we cleanup an intro point from a service so we know when
9700 and for what reason it happened. Closes ticket 23604.
9702 o Minor features (logging):
9703 - Log more circuit information whenever we are about to try to
9704 package a relay cell on a circuit with a nonexistent n_chan.
9705 Attempt to diagnose ticket 8185.
9706 - Improve info-level log identification of particular circuits, to
9707 help with debugging. Closes ticket 23645.
9709 o Minor features (relay):
9710 - When choosing which circuits can be expired as unused, consider
9711 circuits from clients even if those clients used regular CREATE
9712 cells to make them; and do not consider circuits from relays even
9713 if they were made with CREATE_FAST. Part of ticket 22805.
9715 o Minor features (robustness):
9716 - Change several fatal assertions when flushing buffers into non-
9717 fatal assertions, to prevent any recurrence of 23690.
9719 o Minor features (spec conformance, bridge, diagnostic):
9720 - When handling the USERADDR command on an ExtOrPort, warn when the
9721 transports provides a USERADDR with no port. In a future version,
9722 USERADDR commands of this format may be rejected. Detects problems
9723 related to ticket 23080.
9725 o Minor features (testing):
9726 - Add a unit test to make sure that our own generated platform
9727 string will be accepted by directory authorities. Closes
9730 o Minor bugfixes (bootstrapping):
9731 - When warning about state file clock skew, report the correct
9732 direction for the detected skew. Fixes bug 23606; bugfix
9734 - Avoid an assertion failure when logging a state file clock skew
9735 very early in bootstrapping. Fixes bug 23607; bugfix
9738 o Minor bugfixes (build, compilation):
9739 - Fix a compilation warning when building with zstd support on
9740 32-bit platforms. Fixes bug 23568; bugfix on 0.3.1.1-alpha. Found
9741 and fixed by Andreas Stieger.
9742 - When searching for OpenSSL, don't accept any OpenSSL library that
9743 lacks TLSv1_1_method(): Tor doesn't build with those versions.
9744 Additionally, look in /usr/local/opt/openssl, if it's present.
9745 These changes together repair the default build on OSX systems
9746 with Homebrew installed. Fixes bug 23602; bugfix on 0.2.7.2-alpha.
9748 o Minor bugfixes (compression):
9749 - Handle a pathological case when decompressing Zstandard data when
9750 the output buffer size is zero. Fixes bug 23551; bugfix
9753 o Minor bugfixes (documentation):
9754 - Fix manpage to not refer to the obsolete (and misspelled)
9755 UseEntryGuardsAsDirectoryGuards parameter in the description of
9756 NumDirectoryGuards. Fixes bug 23611; bugfix on 0.2.4.8-alpha.
9758 o Minor bugfixes (hidden service v3):
9759 - Don't log an assertion failure when we can't find the right
9760 information to extend to an introduction point. In rare cases,
9761 this could happen, causing a warning, even though tor would
9762 recover gracefully. Fixes bug 23159; bugfix on 0.3.2.1-alpha.
9763 - Pad RENDEZVOUS cell up to the size of the legacy cell which is
9764 much bigger so the rendezvous point can't distinguish which hidden
9765 service protocol is being used. Fixes bug 23420; bugfix
9768 o Minor bugfixes (hidden service, relay):
9769 - Avoid a possible double close of a circuit by the intro point on
9770 error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
9771 bugfix on 0.3.0.1-alpha.
9773 o Minor bugfixes (logging, relay shutdown, annoyance):
9774 - When a circuit is marked for close, do not attempt to package any
9775 cells for channels on that circuit. Previously, we would detect
9776 this condition lower in the call stack, when we noticed that the
9777 circuit had no attached channel, and log an annoying message.
9778 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
9780 o Minor bugfixes (scheduler):
9781 - When switching schedulers due to a consensus change, we didn't
9782 give the new scheduler a chance to react to the consensus. Fix
9783 that. Fixes bug 23537; bugfix on 0.3.2.1-alpha.
9784 - Make the KISTSchedRunInterval option a non negative value. With
9785 this, the way to disable KIST through the consensus is to set it
9786 to 0. Fixes bug 23539; bugfix on 0.3.2.1-alpha.
9787 - Only notice log the selected scheduler when we switch scheduler
9788 types. Fixes bug 23552; bugfix on 0.3.2.1-alpha.
9789 - Avoid a compilation warning on macOS in scheduler_ev_add() caused
9790 by a different tv_usec data type. Fixes bug 23575; bugfix
9792 - Make a hard exit if tor is unable to pick a scheduler which can
9793 happen if the user specifies a scheduler type that is not
9794 supported and not other types in Schedulers. Fixes bug 23581;
9795 bugfix on 0.3.2.1-alpha.
9796 - Properly initialize the scheduler last run time counter so it is
9797 not 0 at the first tick. Fixes bug 23696; bugfix on 0.3.2.1-alpha.
9799 o Minor bugfixes (testing):
9800 - Capture and detect several "Result does not fit" warnings in unit
9801 tests on platforms with 32-bit time_t. Fixes bug 21800; bugfix
9803 - Fix additional channelpadding unit test failures by using mocked
9804 time instead of actual time for all tests. Fixes bug 23608; bugfix
9806 - The removal of some old scheduler options caused some tests to
9807 fail on BSD systems. Assume current behavior is correct and make
9808 the tests pass again. Fixes bug 23566; bugfix on 0.3.2.1-alpha.
9810 o Code simplification and refactoring:
9811 - Remove various ways of testing circuits and connections for
9812 "clientness"; instead, favor channel_is_client(). Part of
9815 o Deprecated features:
9816 - The ReachableDirAddresses and ClientPreferIPv6DirPort options are
9817 now deprecated; they do not apply to relays, and they have had no
9818 effect on clients since 0.2.8.x. Closes ticket 19704.
9821 - HiddenServiceVersion man page entry wasn't mentioning the now
9822 supported version 3. Fixes ticket 23580; bugfix on 0.3.2.1-alpha.
9823 - Clarify that the Address option is entirely about setting an
9824 advertised IPv4 address. Closes ticket 18891.
9825 - Clarify the manpage's use of the term "address" to clarify what
9826 kind of address is intended. Closes ticket 21405.
9827 - Document that onion service subdomains are allowed, and ignored.
9828 Closes ticket 18736.
9831 Changes in version 0.3.2.1-alpha - 2017-09-18
9832 Tor 0.3.2.1-alpha is the first release in the 0.3.2.x series. It
9833 includes support for our next-generation ("v3") onion service
9834 protocol, and adds a new circuit scheduler for more responsive
9835 forwarding decisions from relays. There are also numerous other small
9836 features and bugfixes here.
9838 Below are the changes since Tor 0.3.1.7.
9840 o Major feature (scheduler, channel):
9841 - Tor now uses new schedulers to decide which circuits should
9842 deliver cells first, in order to improve congestion at relays. The
9843 first type is called "KIST" ("Kernel Informed Socket Transport"),
9844 and is only available on Linux-like systems: it uses feedback from
9845 the kernel to prevent the kernel's TCP buffers from growing too
9846 full. The second new scheduler type is called "KISTLite": it
9847 behaves the same as KIST, but runs on systems without kernel
9848 support for inspecting TCP implementation details. The old
9849 scheduler is still available, under the name "Vanilla". To change
9850 the default scheduler preference order, use the new "Schedulers"
9851 option. (The default preference order is "KIST,KISTLite,Vanilla".)
9853 Matt Traudt implemented KIST, based on research by Rob Jansen,
9854 John Geddes, Christ Wacek, Micah Sherr, and Paul Syverson. For
9855 more information, see the design paper at
9856 http://www.robgjansen.com/publications/kist-sec2014.pdf and the
9857 followup implementation paper at https://arxiv.org/abs/1709.01044.
9858 Closes ticket 12541.
9860 o Major features (next-generation onion services):
9861 - Tor now supports the next-generation onion services protocol for
9862 clients and services! As part of this release, the core of
9863 proposal 224 has been implemented and is available for
9864 experimentation and testing by our users. This newer version of
9865 onion services ("v3") features many improvements over the legacy
9868 a) Better crypto (replaced SHA1/DH/RSA1024
9869 with SHA3/ed25519/curve25519)
9871 b) Improved directory protocol, leaking much less information to
9874 c) Improved directory protocol, with smaller surface for
9877 d) Better onion address security against impersonation.
9879 e) More extensible introduction/rendezvous protocol.
9881 f) A cleaner and more modular codebase.
9883 You can identify a next-generation onion address by its length:
9884 they are 56 characters long, as in
9885 "4acth47i6kxnvkewtm6q7ib2s3ufpo5sqbsnzjpbi7utijcltosqemad.onion".
9887 In the future, we will release more options and features for v3
9888 onion services, but we first need a testing period, so that the
9889 current codebase matures and becomes more robust. Planned features
9890 include: offline keys, advanced client authorization, improved
9891 guard algorithms, and statistics. For full details, see
9894 Legacy ("v2") onion services will still work for the foreseeable
9895 future, and will remain the default until this new codebase gets
9896 tested and hardened. Service operators who want to experiment with
9897 the new system can use the 'HiddenServiceVersion 3' torrc
9898 directive along with the regular onion service configuration
9899 options. We will publish a blog post about this new feature
9902 o Major bugfixes (usability, control port):
9903 - Report trusted clock skew indications as bootstrap errors, so
9904 controllers can more easily alert users when their clocks are
9905 wrong. Fixes bug 23506; bugfix on 0.1.2.6-alpha.
9907 o Minor features (bug detection):
9908 - Log a warning message with a stack trace for any attempt to call
9909 get_options() during option validation. This pattern has caused
9910 subtle bugs in the past. Closes ticket 22281.
9912 o Minor features (client):
9913 - You can now use Tor as a tunneled HTTP proxy: use the new
9914 HTTPTunnelPort option to open a port that accepts HTTP CONNECT
9915 requests. Closes ticket 22407.
9916 - Add an extra check to make sure that we always use the newer guard
9917 selection code for picking our guards. Closes ticket 22779.
9918 - When downloading (micro)descriptors, don't split the list into
9919 multiple requests unless we want at least 32 descriptors.
9920 Previously, we split at 4, not 32, which led to significant
9921 overhead in HTTP request size and degradation in compression
9922 performance. Closes ticket 23220.
9924 o Minor features (command line):
9925 - Add a new commandline option, --key-expiration, which prints when
9926 the current signing key is going to expire. Implements ticket
9927 17639; patch by Isis Lovecruft.
9929 o Minor features (control port):
9930 - If an application tries to use the control port as an HTTP proxy,
9931 respond with a meaningful "This is the Tor control port" message,
9932 and log the event. Closes ticket 1667. Patch from Ravi
9934 - Provide better error message for GETINFO desc/(id|name) when not
9935 fetching router descriptors. Closes ticket 5847. Patch by
9937 - Add GETINFO "{desc,md}/download-enabled", to inform the controller
9938 whether Tor will try to download router descriptors and
9939 microdescriptors respectively. Closes ticket 22684.
9940 - Added new GETINFO targets "ip-to-country/{ipv4,ipv6}-available",
9941 so controllers can tell whether the geoip databases are loaded.
9942 Closes ticket 23237.
9943 - Adds a timestamp field to the CIRC_BW and STREAM_BW bandwidth
9944 events. Closes ticket 19254. Patch by "DonnchaC".
9946 o Minor features (development support):
9947 - Developers can now generate a call-graph for Tor using the
9948 "calltool" python program, which post-processes object dumps. It
9949 should work okay on many Linux and OSX platforms, and might work
9950 elsewhere too. To run it, install calltool from
9951 https://gitweb.torproject.org/user/nickm/calltool.git and run
9952 "make callgraph". Closes ticket 19307.
9954 o Minor features (ed25519):
9955 - Add validation function to checks for torsion components in
9956 ed25519 public keys, used by prop224 client-side code. Closes
9957 ticket 22006. Math help by Ian Goldberg.
9959 o Minor features (exit relay, DNS):
9960 - Improve the clarity and safety of the log message from evdns when
9961 receiving an apparently spoofed DNS reply. Closes ticket 3056.
9963 o Minor features (integration, hardening):
9964 - Add a new NoExec option to prevent Tor from running other
9965 programs. When this option is set to 1, Tor will never try to run
9966 another program, regardless of the settings of
9967 PortForwardingHelper, ClientTransportPlugin, or
9968 ServerTransportPlugin. Once NoExec is set, it cannot be disabled
9969 without restarting Tor. Closes ticket 22976.
9971 o Minor features (logging):
9972 - Improve the warning message for specifying a relay by nickname.
9973 The previous message implied that nickname registration was still
9974 part of the Tor network design, which it isn't. Closes
9976 - If the sandbox filter fails to load, suggest to the user that
9977 their kernel might not support seccomp2. Closes ticket 23090.
9979 o Minor features (portability):
9980 - Check at configure time whether uint8_t is the same type as
9981 unsigned char. Lots of existing code already makes this
9982 assumption, and there could be strict aliasing issues if the
9983 assumption is violated. Closes ticket 22410.
9985 o Minor features (relay, configuration):
9986 - Reject attempts to use relative file paths when RunAsDaemon is
9987 set. Previously, Tor would accept these, but the directory-
9988 changing step of RunAsDaemon would give strange and/or confusing
9989 results. Closes ticket 22731.
9991 o Minor features (startup, safety):
9992 - When configured to write a PID file, Tor now exits if it is unable
9993 to do so. Previously, it would warn and continue. Closes
9996 o Minor features (static analysis):
9997 - The BUG() macro has been changed slightly so that Coverity no
9998 longer complains about dead code if the bug is impossible. Closes
10001 o Minor features (testing):
10002 - The default chutney network tests now include tests for the v3
10003 hidden service design. Make sure you have the latest version of
10004 chutney if you want to run these. Closes ticket 22437.
10005 - Add a unit test to verify that we can parse a hardcoded v2 hidden
10006 service descriptor. Closes ticket 15554.
10008 o Minor bugfixes (certificate handling):
10009 - Fix a time handling bug in Tor certificates set to expire after
10010 the year 2106. Fixes bug 23055; bugfix on 0.3.0.1-alpha. Found by
10011 Coverity as CID 1415728.
10013 o Minor bugfixes (client, usability):
10014 - Refrain from needlessly rejecting SOCKS5-with-hostnames and
10015 SOCKS4a requests that contain IP address strings, even when
10016 SafeSocks in enabled, as this prevents user from connecting to
10017 known IP addresses without relying on DNS for resolving. SafeSocks
10018 still rejects SOCKS connections that connect to IP addresses when
10019 those addresses are _not_ encoded as hostnames. Fixes bug 22461;
10020 bugfix on Tor 0.2.6.2-alpha.
10022 o Minor bugfixes (code correctness):
10023 - Call htons() in extend_cell_format() for encoding a 16-bit value.
10024 Previously we used ntohs(), which happens to behave the same on
10025 all the platforms we support, but which isn't really correct.
10026 Fixes bug 23106; bugfix on 0.2.4.8-alpha.
10027 - For defense-in-depth, make the controller's write_escaped_data()
10028 function robust to extremely long inputs. Fixes bug 19281; bugfix
10029 on 0.1.1.1-alpha. Reported by Guido Vranken.
10031 o Minor bugfixes (compilation):
10032 - Fix unused-variable warnings in donna's Curve25519 SSE2 code.
10033 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
10035 o Minor bugfixes (consensus expiry):
10036 - Check for adequate directory information correctly. Previously, Tor
10037 would reconsider whether it had sufficient directory information
10038 every 2 minutes. Fixes bug 23091; bugfix on 0.2.0.19-alpha.
10040 o Minor bugfixes (directory protocol):
10041 - Directory servers now include a "Date:" http header for response
10042 codes other than 200. Clients starting with a skewed clock and a
10043 recent consensus were getting "304 Not modified" responses from
10044 directory authorities, so without the Date header, the client
10045 would never hear about a wrong clock. Fixes bug 23499; bugfix
10047 - Make clients wait for 6 seconds before trying to download a
10048 consensus from an authority. Fixes bug 17750; bugfix
10051 o Minor bugfixes (DoS-resistance):
10052 - If future code asks if there are any running bridges, without
10053 checking if bridges are enabled, log a BUG warning rather than
10054 crashing. Fixes bug 23524; bugfix on 0.3.0.1-alpha.
10056 o Minor bugfixes (format strictness):
10057 - Restrict several data formats to decimal. Previously, the
10058 BuildTimeHistogram entries in the state file, the "bw=" entries in
10059 the bandwidth authority file, and the process IDs passed to the
10060 __OwningControllerProcess option could all be specified in hex or
10061 octal as well as in decimal. This was not an intentional feature.
10062 Fixes bug 22802; bugfixes on 0.2.2.1-alpha, 0.2.2.2-alpha,
10065 o Minor bugfixes (heartbeat):
10066 - If we fail to write a heartbeat message, schedule a retry for the
10067 minimum heartbeat interval number of seconds in the future. Fixes
10068 bug 19476; bugfix on 0.2.3.1-alpha.
10070 o Minor bugfixes (linux seccomp2 sandbox, logging):
10071 - Fix some messages on unexpected errors from the seccomp2 library.
10072 Fixes bug 22750; bugfix on 0.2.5.1-alpha. Patch from "cypherpunks".
10074 o Minor bugfixes (logging):
10075 - Remove duplicate log messages regarding opening non-local
10076 SocksPorts upon parsing config and opening listeners at startup.
10077 Fixes bug 4019; bugfix on 0.2.3.3-alpha.
10078 - Use a more comprehensible log message when telling the user
10079 they've excluded every running exit node. Fixes bug 7890; bugfix
10081 - When logging the number of descriptors we intend to download per
10082 directory request, do not log a number higher than then the number
10083 of descriptors we're fetching in total. Fixes bug 19648; bugfix
10085 - When warning about a directory owned by the wrong user, log the
10086 actual name of the user owning the directory. Previously, we'd log
10087 the name of the process owner twice. Fixes bug 23487; bugfix
10089 - The tor specification says hop counts are 1-based, so fix two log
10090 messages that mistakenly logged 0-based hop counts. Fixes bug
10091 18982; bugfix on 0.2.6.2-alpha and 0.2.4.5-alpha. Patch by teor.
10092 Credit to Xiaofan Li for reporting this issue.
10094 o Minor bugfixes (portability):
10095 - Stop using the PATH_MAX variable, which is not defined on GNU
10096 Hurd. Fixes bug 23098; bugfix on 0.3.1.1-alpha.
10098 o Minor bugfixes (relay):
10099 - When uploading our descriptor for the first time after startup,
10100 report the reason for uploading as "Tor just started" rather than
10101 leaving it blank. Fixes bug 22885; bugfix on 0.2.3.4-alpha.
10102 - Avoid unnecessary calls to directory_fetches_from_authorities() on
10103 relays, to prevent spurious address resolutions and descriptor
10104 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
10105 bugfix on in 0.2.8.1-alpha.
10107 o Minor bugfixes (tests):
10108 - Fix a broken unit test for the OutboundAddress option: the parsing
10109 function was never returning an error on failure. Fixes bug 23366;
10110 bugfix on 0.3.0.3-alpha.
10111 - Fix a signed-integer overflow in the unit tests for
10112 dir/download_status_random_backoff, which was untriggered until we
10113 fixed bug 17750. Fixes bug 22924; bugfix on 0.2.9.1-alpha.
10115 o Minor bugfixes (usability, control port):
10116 - Stop making an unnecessary routerlist check in NETINFO clock skew
10117 detection; this was preventing clients from reporting NETINFO clock
10118 skew to controllers. Fixes bug 23532; bugfix on 0.2.4.4-alpha.
10120 o Code simplification and refactoring:
10121 - Extract the code for handling newly-open channels into a separate
10122 function from the general code to handle channel state
10123 transitions. This change simplifies our callgraph, reducing the
10124 size of the largest strongly connected component by roughly a
10125 factor of two. Closes ticket 22608.
10126 - Remove dead code for largely unused statistics on the number of
10127 times we've attempted various public key operations. Fixes bug
10128 19871; bugfix on 0.1.2.4-alpha. Fix by Isis Lovecruft.
10129 - Remove several now-obsolete functions for asking about old
10130 variants directory authority status. Closes ticket 22311; patch
10132 - Remove some of the code that once supported "Named" and "Unnamed"
10133 routers. Authorities no longer vote for these flags. Closes
10135 - Rename the obsolete malleable hybrid_encrypt functions used in TAP
10136 and old hidden services, to indicate that they aren't suitable for
10137 new protocols or formats. Closes ticket 23026.
10138 - Replace our STRUCT_OFFSET() macro with offsetof(). Closes ticket
10139 22521. Patch from Neel Chauhan.
10140 - Split the enormous circuit_send_next_onion_skin() function into
10141 multiple subfunctions. Closes ticket 22804.
10142 - Split the portions of the buffer.c module that handle particular
10143 protocols into separate modules. Part of ticket 23149.
10144 - Use our test macros more consistently, to produce more useful
10145 error messages when our unit tests fail. Add coccinelle patches to
10146 allow us to re-check for test macro uses. Closes ticket 22497.
10148 o Deprecated features:
10149 - Deprecate HTTPProxy/HTTPProxyAuthenticator config options. They
10150 only applies to direct unencrypted HTTP connections to your
10151 directory server, which your Tor probably isn't using. Closes
10155 - Clarify in the manual that "Sandbox 1" is only supported on Linux
10156 kernels. Closes ticket 22677.
10157 - Document all values of PublishServerDescriptor in the manpage.
10158 Closes ticket 15645.
10159 - Improve the documentation for the directory port part of the
10160 DirAuthority line. Closes ticket 20152.
10161 - Restore documentation for the authorities' "approved-routers"
10162 file. Closes ticket 21148.
10164 o Removed features:
10165 - The AllowDotExit option has been removed as unsafe. It has been
10166 deprecated since 0.2.9.2-alpha. Closes ticket 23426.
10167 - The ClientDNSRejectInternalAddresses flag can no longer be set on
10168 non-testing networks. It has been deprecated since 0.2.9.2-alpha.
10169 Closes ticket 21031.
10170 - The controller API no longer includes an AUTHDIR_NEWDESCS event:
10171 nobody was using it any longer. Closes ticket 22377.
10174 Changes in version 0.2.8.15 - 2017-09-18
10175 Tor 0.2.8.15 backports a collection of bugfixes from later
10178 Most significantly, it includes a fix for TROVE-2017-008, a
10179 security bug that affects hidden services running with the
10180 SafeLogging option disabled. For more information, see
10181 https://trac.torproject.org/projects/tor/ticket/23490
10183 Note that Tor 0.2.8.x will no longer be supported after 1 Jan
10184 2018. We suggest that you upgrade to the latest stable release if
10185 possible. If you can't, we recommend that you upgrade at least to
10186 0.2.9, which will be supported until 2020.
10188 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
10189 - Avoid an assertion failure bug affecting our implementation of
10190 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
10191 handling of "0xx" differs from what we had expected. Fixes bug
10192 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
10195 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
10198 o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
10199 - Backport a fix for an "unused variable" warning that appeared
10200 in some versions of mingw. Fixes bug 22838; bugfix on
10203 o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
10204 - Fix a memset() off the end of an array when packing cells. This
10205 bug should be harmless in practice, since the corrupted bytes are
10206 still in the same structure, and are always padding bytes,
10207 ignored, or immediately overwritten, depending on compiler
10208 behavior. Nevertheless, because the memset()'s purpose is to make
10209 sure that any other cell-handling bugs can't expose bytes to the
10210 network, we need to fix it. Fixes bug 22737; bugfix on
10211 0.2.4.11-alpha. Fixes CID 1401591.
10213 o Build features (backport from 0.3.1.5-alpha):
10214 - Tor's repository now includes a Travis Continuous Integration (CI)
10215 configuration file (.travis.yml). This is meant to help new
10216 developers and contributors who fork Tor to a Github repository be
10217 better able to test their changes, and understand what we expect
10218 to pass. To use this new build feature, you must fork Tor to your
10219 Github account, then go into the "Integrations" menu in the
10220 repository settings for your fork and enable Travis, then push
10221 your changes. Closes ticket 22636.
10224 Changes in version 0.2.9.12 - 2017-09-18
10225 Tor 0.2.9.12 backports a collection of bugfixes from later
10228 Most significantly, it includes a fix for TROVE-2017-008, a
10229 security bug that affects hidden services running with the
10230 SafeLogging option disabled. For more information, see
10231 https://trac.torproject.org/projects/tor/ticket/23490
10233 o Major features (security, backport from 0.3.0.2-alpha):
10234 - Change the algorithm used to decide DNS TTLs on client and server
10235 side, to better resist DNS-based correlation attacks like the
10236 DefecTor attack of Greschbach, Pulls, Roberts, Winter, and
10237 Feamster. Now relays only return one of two possible DNS TTL
10238 values, and clients are willing to believe DNS TTL values up to 3
10239 hours long. Closes ticket 19769.
10241 o Major bugfixes (crash, directory connections, backport from 0.3.0.5-rc):
10242 - Fix a rare crash when sending a begin cell on a circuit whose
10243 linked directory connection had already been closed. Fixes bug
10244 21576; bugfix on 0.2.9.3-alpha. Reported by Alec Muffett.
10246 o Major bugfixes (DNS, backport from 0.3.0.2-alpha):
10247 - Fix a bug that prevented exit nodes from caching DNS records for
10248 more than 60 seconds. Fixes bug 19025; bugfix on 0.2.4.7-alpha.
10250 o Major bugfixes (linux TPROXY support, backport from 0.3.1.1-alpha):
10251 - Fix a typo that had prevented TPROXY-based transparent proxying
10252 from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
10253 Patch from "d4fq0fQAgoJ".
10255 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
10256 - Avoid an assertion failure bug affecting our implementation of
10257 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
10258 handling of "0xx" differs from what we had expected. Fixes bug
10259 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
10261 o Minor features (code style, backport from 0.3.1.3-alpha):
10262 - Add "Falls through" comments to our codebase, in order to silence
10263 GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
10264 Stieger. Closes ticket 22446.
10266 o Minor features (geoip):
10267 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
10270 o Minor bugfixes (bandwidth accounting, backport from 0.3.1.1-alpha):
10271 - Roll over monthly accounting at the configured hour and minute,
10272 rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
10273 Found by Andrey Karpov with PVS-Studio.
10275 o Minor bugfixes (compilation, backport from 0.3.1.5-alpha):
10276 - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug 22915;
10277 bugfix on 0.2.8.1-alpha.
10278 - Fix warnings when building with libscrypt and openssl scrypt support
10279 on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
10280 - When building with certain versions the mingw C header files, avoid
10281 float-conversion warnings when calling the C functions isfinite(),
10282 isnan(), and signbit(). Fixes bug 22801; bugfix on 0.2.8.1-alpha.
10284 o Minor bugfixes (compilation, backport from 0.3.1.7):
10285 - Avoid compiler warnings in the unit tests for running tor_sscanf()
10286 with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
10288 o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
10289 - Backport a fix for an "unused variable" warning that appeared
10290 in some versions of mingw. Fixes bug 22838; bugfix on
10293 o Minor bugfixes (controller, backport from 0.3.1.7):
10294 - Do not crash when receiving a HSPOST command with an empty body.
10295 Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
10296 - Do not crash when receiving a POSTDESCRIPTOR command with an
10297 empty body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
10299 o Minor bugfixes (coverity build support, backport from 0.3.1.5-alpha):
10300 - Avoid Coverity build warnings related to our BUG() macro. By
10301 default, Coverity treats BUG() as the Linux kernel does: an
10302 instant abort(). We need to override that so our BUG() macro
10303 doesn't prevent Coverity from analyzing functions that use it.
10304 Fixes bug 23030; bugfix on 0.2.9.1-alpha.
10306 o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
10307 - Fix a memset() off the end of an array when packing cells. This
10308 bug should be harmless in practice, since the corrupted bytes are
10309 still in the same structure, and are always padding bytes,
10310 ignored, or immediately overwritten, depending on compiler
10311 behavior. Nevertheless, because the memset()'s purpose is to make
10312 sure that any other cell-handling bugs can't expose bytes to the
10313 network, we need to fix it. Fixes bug 22737; bugfix on
10314 0.2.4.11-alpha. Fixes CID 1401591.
10316 o Minor bugfixes (file limits, osx, backport from 0.3.1.5-alpha):
10317 - When setting the maximum number of connections allowed by the OS,
10318 always allow some extra file descriptors for other files. Fixes
10319 bug 22797; bugfix on 0.2.0.10-alpha.
10321 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.5-alpha):
10322 - Avoid a sandbox failure when trying to re-bind to a socket and
10323 mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
10325 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.4-alpha):
10326 - Permit the fchmod system call, to avoid crashing on startup when
10327 starting with the seccomp2 sandbox and an unexpected set of
10328 permissions on the data directory or its contents. Fixes bug
10329 22516; bugfix on 0.2.5.4-alpha.
10331 o Minor bugfixes (relay, backport from 0.3.0.5-rc):
10332 - Avoid a double-marked-circuit warning that could happen when we
10333 receive DESTROY cells under heavy load. Fixes bug 20059; bugfix
10336 o Minor bugfixes (voting consistency, backport from 0.3.1.1-alpha):
10337 - Reject version numbers with non-numeric prefixes (such as +, -, or
10338 whitespace). Disallowing whitespace prevents differential version
10339 parsing between POSIX-based and Windows platforms. Fixes bug 21507
10340 and part of 21508; bugfix on 0.0.8pre1.
10342 o Build features (backport from 0.3.1.5-alpha):
10343 - Tor's repository now includes a Travis Continuous Integration (CI)
10344 configuration file (.travis.yml). This is meant to help new
10345 developers and contributors who fork Tor to a Github repository be
10346 better able to test their changes, and understand what we expect
10347 to pass. To use this new build feature, you must fork Tor to your
10348 Github account, then go into the "Integrations" menu in the
10349 repository settings for your fork and enable Travis, then push
10350 your changes. Closes ticket 22636.
10353 Changes in version 0.3.0.11 - 2017-09-18
10354 Tor 0.3.0.11 backports a collection of bugfixes from Tor the 0.3.1
10357 Most significantly, it includes a fix for TROVE-2017-008, a
10358 security bug that affects hidden services running with the
10359 SafeLogging option disabled. For more information, see
10360 https://trac.torproject.org/projects/tor/ticket/23490
10362 o Minor features (code style, backport from 0.3.1.7):
10363 - Add "Falls through" comments to our codebase, in order to silence
10364 GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
10365 Stieger. Closes ticket 22446.
10368 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
10371 o Minor bugfixes (compilation, backport from 0.3.1.7):
10372 - Avoid compiler warnings in the unit tests for calling tor_sscanf()
10373 with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
10375 o Minor bugfixes (controller, backport from 0.3.1.7):
10376 - Do not crash when receiving a HSPOST command with an empty body.
10377 Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
10378 - Do not crash when receiving a POSTDESCRIPTOR command with an empty
10379 body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
10381 o Minor bugfixes (file limits, osx, backport from 0.3.1.5-alpha):
10382 - When setting the maximum number of connections allowed by the OS,
10383 always allow some extra file descriptors for other files. Fixes
10384 bug 22797; bugfix on 0.2.0.10-alpha.
10386 o Minor bugfixes (logging, relay, backport from 0.3.1.6-rc):
10387 - Remove a forgotten debugging message when an introduction point
10388 successfully establishes a hidden service prop224 circuit with
10390 - Change three other log_warn() for an introduction point to
10391 protocol warnings, because they can be failure from the network
10392 and are not relevant to the operator. Fixes bug 23078; bugfix on
10393 0.3.0.1-alpha and 0.3.0.2-alpha.
10396 Changes in version 0.3.1.7 - 2017-09-18
10397 Tor 0.3.1.7 is the first stable release in the 0.3.1 series.
10399 With the 0.3.1 series, Tor now serves and downloads directory
10400 information in more compact formats, to save on bandwidth overhead. It
10401 also contains a new padding system to resist netflow-based traffic
10402 analysis, and experimental support for building parts of Tor in Rust
10403 (though no parts of Tor are in Rust yet). There are also numerous
10404 small features, bugfixes on earlier release series, and groundwork for
10405 the hidden services revamp of 0.3.2.
10407 This release also includes a fix for TROVE-2017-008, a security bug
10408 that affects hidden services running with the SafeLogging option
10409 disabled. For more information, see
10410 https://trac.torproject.org/projects/tor/ticket/23490
10412 Per our stable release policy, we plan to support each stable release
10413 series for at least the next nine months, or for three months after
10414 the first stable release of the next series: whichever is longer. If
10415 you need a release with long-term support, we recommend that you stay
10416 with the 0.2.9 series.
10418 Below is a list of the changes since 0.3.1.6-rc. For a list of all
10419 changes since 0.3.0, see the ReleaseNotes file.
10421 o Major bugfixes (security, hidden services, loggging):
10422 - Fix a bug where we could log uninitialized stack when a certain
10423 hidden service error occurred while SafeLogging was disabled.
10424 Fixes bug #23490; bugfix on 0.2.7.2-alpha. This is also tracked as
10425 TROVE-2017-008 and CVE-2017-0380.
10427 o Minor features (defensive programming):
10428 - Create a pair of consensus parameters, nf_pad_tor2web and
10429 nf_pad_single_onion, to disable netflow padding in the consensus
10430 for non-anonymous connections in case the overhead is high. Closes
10433 o Minor features (diagnostic):
10434 - Add a stack trace to the bug warnings that can be logged when
10435 trying to send an outgoing relay cell with n_chan == 0. Diagnostic
10436 attempt for bug 23105.
10438 o Minor features (geoip):
10439 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
10442 o Minor bugfixes (compilation):
10443 - Avoid compiler warnings in the unit tests for calling tor_sscanf()
10444 with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
10446 o Minor bugfixes (controller):
10447 - Do not crash when receiving a HSPOST command with an empty body.
10448 Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
10449 - Do not crash when receiving a POSTDESCRIPTOR command with an empty
10450 body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
10452 o Minor bugfixes (relay):
10453 - Inform the geoip and rephist modules about all requests, even on
10454 relays that are only fetching microdescriptors. Fixes a bug
10455 related to 21585; bugfix on 0.3.0.1-alpha.
10457 o Minor bugfixes (unit tests):
10458 - Fix a channelpadding unit test failure on slow systems by using
10459 mocked time instead of actual time. Fixes bug 23077; bugfix
10463 Changes in version 0.3.1.6-rc - 2017-09-05
10464 Tor 0.3.1.6-rc fixes a few small bugs and annoyances in the 0.3.1
10465 release series, including a bug that produced weird behavior on
10466 Windows directory caches.
10468 This is the first release candidate in the Tor 0.3.1 series. If we
10469 find no new bugs or regressions here, the first stable 0.3.1 release
10470 will be nearly identical to it.
10472 o Major bugfixes (windows, directory cache):
10473 - On Windows, do not try to delete cached consensus documents and
10474 diffs before they are unmapped from memory--Windows won't allow
10475 that. Instead, allow the consensus cache directory to grow larger,
10476 to hold files that might need to stay around longer. Fixes bug
10477 22752; bugfix on 0.3.1.1-alpha.
10479 o Minor features (directory authority):
10480 - Improve the message that authorities report to relays that present
10481 RSA/Ed25519 keypairs that conflict with previously pinned keys.
10482 Closes ticket 22348.
10484 o Minor features (geoip):
10485 - Update geoip and geoip6 to the August 3 2017 Maxmind GeoLite2
10488 o Minor features (testing):
10489 - Add more tests for compression backend initialization. Closes
10492 o Minor bugfixes (directory cache):
10493 - Fix a memory leak when recovering space in the consensus cache.
10494 Fixes bug 23139; bugfix on 0.3.1.1-alpha.
10496 o Minor bugfixes (hidden service):
10497 - Increase the number of circuits that a service is allowed to
10498 open over a specific period of time. The value was lower than it
10499 should be (8 vs 12) in the normal case of 3 introduction points.
10500 Fixes bug 22159; bugfix on 0.3.0.5-rc.
10501 - Fix a BUG warning during HSv3 descriptor decoding that could be
10502 cause by a specially crafted descriptor. Fixes bug 23233; bugfix
10503 on 0.3.0.1-alpha. Bug found by "haxxpop".
10504 - Rate-limit the log messages if we exceed the maximum number of
10505 allowed intro circuits. Fixes bug 22159; bugfix on 0.3.1.1-alpha.
10507 o Minor bugfixes (logging, relay):
10508 - Remove a forgotten debugging message when an introduction point
10509 successfully establishes a hidden service prop224 circuit with
10511 - Change three other log_warn() for an introduction point to
10512 protocol warnings, because they can be failure from the network
10513 and are not relevant to the operator. Fixes bug 23078; bugfix on
10514 0.3.0.1-alpha and 0.3.0.2-alpha.
10516 o Minor bugfixes (relay):
10517 - When a relay is not running as a directory cache, it will no
10518 longer generate compressed consensuses and consensus diff
10519 information. Previously, this was a waste of disk and CPU. Fixes
10520 bug 23275; bugfix on 0.3.1.1-alpha.
10522 o Minor bugfixes (robustness, error handling):
10523 - Improve our handling of the cases where OpenSSL encounters a
10524 memory error while encoding keys and certificates. We haven't
10525 observed these errors in the wild, but if they do happen, we now
10526 detect and respond better. Fixes bug 19418; bugfix on all versions
10527 of Tor. Reported by Guido Vranken.
10529 o Minor bugfixes (stability):
10530 - Avoid crashing on a double-free when unable to load or process an
10531 included file. Fixes bug 23155; bugfix on 0.3.1.1-alpha. Found
10532 with the clang static analyzer.
10534 o Minor bugfixes (testing):
10535 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
10536 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
10537 - Port the hs_ntor handshake test to work correctly with recent
10538 versions of the pysha3 module. Fixes bug 23071; bugfix
10541 o Minor bugfixes (Windows service):
10542 - When running as a Windows service, set the ID of the main thread
10543 correctly. Failure to do so made us fail to send log messages to
10544 the controller in 0.2.1.16-rc, slowed down controller event
10545 delivery in 0.2.7.3-rc and later, and crash with an assertion
10546 failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
10547 Patch and diagnosis from "Vort".
10550 Changes in version 0.3.0.10 - 2017-08-02
10551 Tor 0.3.0.10 backports a collection of small-to-medium bugfixes
10552 from the current Tor alpha series. OpenBSD users and TPROXY users
10553 should upgrade; others are probably okay sticking with 0.3.0.9.
10555 o Major features (build system, continuous integration, backport from 0.3.1.5-alpha):
10556 - Tor's repository now includes a Travis Continuous Integration (CI)
10557 configuration file (.travis.yml). This is meant to help new
10558 developers and contributors who fork Tor to a Github repository be
10559 better able to test their changes, and understand what we expect
10560 to pass. To use this new build feature, you must fork Tor to your
10561 Github account, then go into the "Integrations" menu in the
10562 repository settings for your fork and enable Travis, then push
10563 your changes. Closes ticket 22636.
10565 o Major bugfixes (linux TPROXY support, backport from 0.3.1.1-alpha):
10566 - Fix a typo that had prevented TPROXY-based transparent proxying
10567 from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
10568 Patch from "d4fq0fQAgoJ".
10570 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
10571 - Avoid an assertion failure bug affecting our implementation of
10572 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
10573 handling of "0xbar" differs from what we had expected. Fixes bug
10574 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
10576 o Minor features (backport from 0.3.1.5-alpha):
10577 - Update geoip and geoip6 to the July 4 2017 Maxmind GeoLite2
10580 o Minor bugfixes (bandwidth accounting, backport from 0.3.1.2-alpha):
10581 - Roll over monthly accounting at the configured hour and minute,
10582 rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
10583 Found by Andrey Karpov with PVS-Studio.
10585 o Minor bugfixes (compilation warnings, backport from 0.3.1.5-alpha):
10586 - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug 22915;
10587 bugfix on 0.2.8.1-alpha.
10588 - Fix warnings when building with libscrypt and openssl scrypt
10589 support on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
10590 - When building with certain versions of the mingw C header files,
10591 avoid float-conversion warnings when calling the C functions
10592 isfinite(), isnan(), and signbit(). Fixes bug 22801; bugfix
10595 o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
10596 - Backport a fix for an "unused variable" warning that appeared
10597 in some versions of mingw. Fixes bug 22838; bugfix on
10600 o Minor bugfixes (coverity build support, backport from 0.3.1.5-alpha):
10601 - Avoid Coverity build warnings related to our BUG() macro. By
10602 default, Coverity treats BUG() as the Linux kernel does: an
10603 instant abort(). We need to override that so our BUG() macro
10604 doesn't prevent Coverity from analyzing functions that use it.
10605 Fixes bug 23030; bugfix on 0.2.9.1-alpha.
10607 o Minor bugfixes (directory authority, backport from 0.3.1.1-alpha):
10608 - When rejecting a router descriptor for running an obsolete version
10609 of Tor without ntor support, warn about the obsolete tor version,
10610 not the missing ntor key. Fixes bug 20270; bugfix on 0.2.9.3-alpha.
10612 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.5-alpha):
10613 - Avoid a sandbox failure when trying to re-bind to a socket and
10614 mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
10616 o Minor bugfixes (unit tests, backport from 0.3.1.5-alpha)
10617 - Fix a memory leak in the link-handshake/certs_ok_ed25519 test.
10618 Fixes bug 22803; bugfix on 0.3.0.1-alpha.
10621 Changes in version 0.3.1.5-alpha - 2017-08-01
10622 Tor 0.3.1.5-alpha improves the performance of consensus diff
10623 calculation, fixes a crash bug on older versions of OpenBSD, and fixes
10624 several other bugs. If no serious bugs are found in this version, the
10625 next version will be a release candidate.
10627 This release also marks the end of support for the Tor 0.2.4.x,
10628 0.2.6.x, and 0.2.7.x release series. Those releases will receive no
10629 further bug or security fixes. Anyone still running or distributing
10630 one of those versions should upgrade.
10632 o Major features (build system, continuous integration):
10633 - Tor's repository now includes a Travis Continuous Integration (CI)
10634 configuration file (.travis.yml). This is meant to help new
10635 developers and contributors who fork Tor to a Github repository be
10636 better able to test their changes, and understand what we expect
10637 to pass. To use this new build feature, you must fork Tor to your
10638 Github account, then go into the "Integrations" menu in the
10639 repository settings for your fork and enable Travis, then push
10640 your changes. Closes ticket 22636.
10642 o Major bugfixes (openbsd, denial-of-service):
10643 - Avoid an assertion failure bug affecting our implementation of
10644 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
10645 handling of "0xbar" differs from what we had expected. Fixes bug
10646 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
10648 o Major bugfixes (relay, performance):
10649 - Perform circuit handshake operations at a higher priority than we
10650 use for consensus diff creation and compression. This should
10651 prevent circuits from starving when a relay or bridge receives a
10652 new consensus, especially on lower-powered machines. Fixes bug
10653 22883; bugfix on 0.3.1.1-alpha.
10655 o Minor features (bridge authority):
10656 - Add "fingerprint" lines to the networkstatus-bridges file produced
10657 by bridge authorities. Closes ticket 22207.
10659 o Minor features (directory cache, consensus diff):
10660 - Add a new MaxConsensusAgeForDiffs option to allow directory cache
10661 operators with low-resource environments to adjust the number of
10662 consensuses they'll store and generate diffs from. Most cache
10663 operators should leave it unchanged. Helps to work around
10666 o Minor features (geoip):
10667 - Update geoip and geoip6 to the July 4 2017 Maxmind GeoLite2
10670 o Minor features (relay, performance):
10671 - Always start relays with at least two worker threads, to prevent
10672 priority inversion on slow tasks. Part of the fix for bug 22883.
10673 - Allow background work to be queued with different priorities, so
10674 that a big pile of slow low-priority jobs will not starve out
10675 higher priority jobs. This lays the groundwork for a fix for
10678 o Minor bugfixes (build system, rust):
10679 - Fix a problem where Rust toolchains were not being found when
10680 building without --enable-cargo-online-mode, due to setting the
10681 $HOME environment variable instead of $CARGO_HOME. Fixes bug
10682 22830; bugfix on 0.3.1.1-alpha. Fix by Chelsea Komlo.
10684 o Minor bugfixes (compatibility, zstd):
10685 - Write zstd epilogues correctly when the epilogue requires
10686 reallocation of the output buffer, even with zstd 1.3.0.
10687 (Previously, we worked on 1.2.0 and failed with 1.3.0). Fixes bug
10688 22927; bugfix on 0.3.1.1-alpha.
10690 o Minor bugfixes (compilation warnings):
10691 - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug
10692 22915; bugfix on 0.2.8.1-alpha.
10693 - Fix warnings when building with libscrypt and openssl scrypt
10694 support on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
10695 - Compile correctly when both openssl 1.1.0 and libscrypt are
10696 detected. Previously this would cause an error. Fixes bug 22892;
10697 bugfix on 0.3.1.1-alpha.
10698 - When building with certain versions of the mingw C header files,
10699 avoid float-conversion warnings when calling the C functions
10700 isfinite(), isnan(), and signbit(). Fixes bug 22801; bugfix
10703 o Minor bugfixes (coverity build support):
10704 - Avoid Coverity build warnings related to our BUG() macro. By
10705 default, Coverity treats BUG() as the Linux kernel does: an
10706 instant abort(). We need to override that so our BUG() macro
10707 doesn't prevent Coverity from analyzing functions that use it.
10708 Fixes bug 23030; bugfix on 0.2.9.1-alpha.
10710 o Minor bugfixes (directory authority):
10711 - When a directory authority rejects a descriptor or extrainfo with
10712 a given digest, mark that digest as undownloadable, so that we do
10713 not attempt to download it again over and over. We previously
10714 tried to avoid downloading such descriptors by other means, but we
10715 didn't notice if we accidentally downloaded one anyway. This
10716 behavior became problematic in 0.2.7.2-alpha, when authorities
10717 began pinning Ed25519 keys. Fixes bug 22349; bugfix
10720 o Minor bugfixes (error reporting, windows):
10721 - When formatting Windows error messages, use the English format to
10722 avoid codepage issues. Fixes bug 22520; bugfix on 0.1.2.8-alpha.
10725 o Minor bugfixes (file limits, osx):
10726 - When setting the maximum number of connections allowed by the OS,
10727 always allow some extra file descriptors for other files. Fixes
10728 bug 22797; bugfix on 0.2.0.10-alpha.
10730 o Minor bugfixes (linux seccomp2 sandbox):
10731 - Avoid a sandbox failure when trying to re-bind to a socket and
10732 mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
10734 o Minor bugfixes (memory leaks):
10735 - Fix a small memory leak when validating a configuration that uses
10736 two or more AF_UNIX sockets for the same port type. Fixes bug
10737 23053; bugfix on 0.2.6.3-alpha. This is CID 1415725.
10739 o Minor bugfixes (unit tests):
10740 - test_consdiff_base64cmp would fail on OS X because while OS X
10741 follows the standard of (less than zero/zero/greater than zero),
10742 it doesn't follow the convention of (-1/0/+1). Make the test
10743 comply with the standard. Fixes bug 22870; bugfix on 0.3.1.1-alpha.
10744 - Fix a memory leak in the link-handshake/certs_ok_ed25519 test.
10745 Fixes bug 22803; bugfix on 0.3.0.1-alpha.
10748 Changes in version 0.3.1.4-alpha - 2017-06-29
10749 Tor 0.3.1.4-alpha fixes a path selection bug that would allow a client
10750 to use a guard that was in the same network family as a chosen exit
10751 relay. This is a security regression; all clients running earlier
10752 versions of 0.3.0.x or 0.3.1.x should upgrade to 0.3.0.9
10755 This release also fixes several other bugs introduced in 0.3.0.x
10756 and 0.3.1.x, including others that can affect bandwidth usage
10759 o New dependencies:
10760 - To build with zstd and lzma support, Tor now requires the
10761 pkg-config tool at build time. (This requirement was new in
10762 0.3.1.1-alpha, but was not noted at the time. Noting it here to
10763 close ticket 22623.)
10765 o Major bugfixes (path selection, security):
10766 - When choosing which guard to use for a circuit, avoid the exit's
10767 family along with the exit itself. Previously, the new guard
10768 selection logic avoided the exit, but did not consider its family.
10769 Fixes bug 22753; bugfix on 0.3.0.1-alpha. Tracked as TROVE-2017-
10770 006 and CVE-2017-0377.
10772 o Major bugfixes (compression, zstd):
10773 - Correctly detect a full buffer when decompressing a large zstd-
10774 compressed input. Previously, we would sometimes treat a full
10775 buffer as an error. Fixes bug 22628; bugfix on 0.3.1.1-alpha.
10777 o Major bugfixes (directory protocol):
10778 - Ensure that we send "304 Not modified" as HTTP status code when a
10779 client is attempting to fetch a consensus or consensus diff, and
10780 the best one we can send them is one they already have. Fixes bug
10781 22702; bugfix on 0.3.1.1-alpha.
10783 o Major bugfixes (entry guards):
10784 - When starting with an old consensus, do not add new entry guards
10785 unless the consensus is "reasonably live" (under 1 day old). Fixes
10786 one root cause of bug 22400; bugfix on 0.3.0.1-alpha.
10788 o Minor features (bug mitigation, diagnostics, logging):
10789 - Avoid an assertion failure, and log a better error message, when
10790 unable to remove a file from the consensus cache on Windows.
10791 Attempts to mitigate and diagnose bug 22752.
10793 o Minor features (geoip):
10794 - Update geoip and geoip6 to the June 8 2017 Maxmind GeoLite2
10797 o Minor bugfixes (compression):
10798 - When compressing or decompressing a buffer, check for a failure to
10799 create a compression object. Fixes bug 22626; bugfix
10801 - When decompressing a buffer, check for extra data after the end of
10802 the compressed data. Fixes bug 22629; bugfix on 0.3.1.1-alpha.
10803 - When decompressing an object received over an anonymous directory
10804 connection, if we have already decompressed it using an acceptable
10805 compression method, do not reject it for looking like an
10806 unacceptable compression method. Fixes part of bug 22670; bugfix
10808 - When serving directory votes compressed with zlib, do not claim to
10809 have compressed them with zstd. Fixes bug 22669; bugfix
10811 - When spooling compressed data to an output buffer, don't try to
10812 spool more data when there is no more data to spool and we are not
10813 trying to flush the input. Previously, we would sometimes launch
10814 compression requests with nothing to do, which interferes with our
10815 22672 checks. Fixes bug 22719; bugfix on 0.2.0.16-alpha.
10817 o Minor bugfixes (defensive programming):
10818 - Detect and break out of infinite loops in our compression code. We
10819 don't think that any such loops exist now, but it's best to be
10820 safe. Closes ticket 22672.
10821 - Fix a memset() off the end of an array when packing cells. This
10822 bug should be harmless in practice, since the corrupted bytes are
10823 still in the same structure, and are always padding bytes,
10824 ignored, or immediately overwritten, depending on compiler
10825 behavior. Nevertheless, because the memset()'s purpose is to make
10826 sure that any other cell-handling bugs can't expose bytes to the
10827 network, we need to fix it. Fixes bug 22737; bugfix on
10828 0.2.4.11-alpha. Fixes CID 1401591.
10830 o Minor bugfixes (linux seccomp2 sandbox):
10831 - Permit the fchmod system call, to avoid crashing on startup when
10832 starting with the seccomp2 sandbox and an unexpected set of
10833 permissions on the data directory or its contents. Fixes bug
10834 22516; bugfix on 0.2.5.4-alpha.
10835 - Fix a crash in the LZMA module, when the sandbox was enabled, and
10836 liblzma would allocate more than 16 MB of memory. We solve this by
10837 bumping the mprotect() limit in the sandbox module from 16 MB to
10838 20 MB. Fixes bug 22751; bugfix on 0.3.1.1-alpha.
10840 o Minor bugfixes (logging):
10841 - When decompressing, do not warn if we fail to decompress using a
10842 compression method that we merely guessed. Fixes part of bug
10843 22670; bugfix on 0.1.1.14-alpha.
10844 - When decompressing, treat mismatch between content-encoding and
10845 actual compression type as a protocol warning. Fixes part of bug
10846 22670; bugfix on 0.1.1.9-alpha.
10847 - Downgrade "assigned_to_cpuworker failed" message to info-level
10848 severity. In every case that can reach it, either a better warning
10849 has already been logged, or no warning is warranted. Fixes bug
10850 22356; bugfix on 0.2.6.3-alpha.
10851 - Demote a warn that was caused by libevent delays to info if
10852 netflow padding is less than 4.5 seconds late, or to notice
10853 if it is more (4.5 seconds is the amount of time that a netflow
10854 record might be emitted after, if we chose the maximum timeout).
10855 Fixes bug 22212; bugfix on 0.3.1.1-alpha.
10857 o Minor bugfixes (process behavior):
10858 - When exiting because of an error, always exit with a nonzero exit
10859 status. Previously, we would fail to report an error in our exit
10860 status in cases related to __OwningControllerProcess failure,
10861 lockfile contention, and Ed25519 key initialization. Fixes bug
10862 22720; bugfix on versions 0.2.1.6-alpha, 0.2.2.28-beta, and
10863 0.2.7.2-alpha respectively. Reported by "f55jwk4f"; patch
10867 - Add a manpage description for the key-pinning-journal file. Closes
10869 - Correctly note that bandwidth accounting values are stored in the
10870 state file, and the bw_accounting file is now obsolete. Closes
10872 - Document more of the files in the Tor data directory, including
10873 cached-extrainfo, secret_onion_key{,_ntor}.old, hidserv-stats,
10874 approved-routers, sr-random, and diff-cache. Found while fixing
10878 Changes in version 0.3.0.9 - 2017-06-29
10879 Tor 0.3.0.9 fixes a path selection bug that would allow a client
10880 to use a guard that was in the same network family as a chosen exit
10881 relay. This is a security regression; all clients running earlier
10882 versions of 0.3.0.x or 0.3.1.x should upgrade to 0.3.0.9 or
10885 This release also backports several other bugfixes from the 0.3.1.x
10888 o Major bugfixes (path selection, security, backport from 0.3.1.4-alpha):
10889 - When choosing which guard to use for a circuit, avoid the exit's
10890 family along with the exit itself. Previously, the new guard
10891 selection logic avoided the exit, but did not consider its family.
10892 Fixes bug 22753; bugfix on 0.3.0.1-alpha. Tracked as TROVE-2017-
10893 006 and CVE-2017-0377.
10895 o Major bugfixes (entry guards, backport from 0.3.1.1-alpha):
10896 - Don't block bootstrapping when a primary bridge is offline and we
10897 can't get its descriptor. Fixes bug 22325; fixes one case of bug
10898 21969; bugfix on 0.3.0.3-alpha.
10900 o Major bugfixes (entry guards, backport from 0.3.1.4-alpha):
10901 - When starting with an old consensus, do not add new entry guards
10902 unless the consensus is "reasonably live" (under 1 day old). Fixes
10903 one root cause of bug 22400; bugfix on 0.3.0.1-alpha.
10905 o Minor features (geoip):
10906 - Update geoip and geoip6 to the June 8 2017 Maxmind GeoLite2
10909 o Minor bugfixes (voting consistency, backport from 0.3.1.1-alpha):
10910 - Reject version numbers with non-numeric prefixes (such as +, -, or
10911 whitespace). Disallowing whitespace prevents differential version
10912 parsing between POSIX-based and Windows platforms. Fixes bug 21507
10913 and part of 21508; bugfix on 0.0.8pre1.
10915 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.4-alpha):
10916 - Permit the fchmod system call, to avoid crashing on startup when
10917 starting with the seccomp2 sandbox and an unexpected set of
10918 permissions on the data directory or its contents. Fixes bug
10919 22516; bugfix on 0.2.5.4-alpha.
10921 o Minor bugfixes (defensive programming, backport from 0.3.1.4-alpha):
10922 - Fix a memset() off the end of an array when packing cells. This
10923 bug should be harmless in practice, since the corrupted bytes are
10924 still in the same structure, and are always padding bytes,
10925 ignored, or immediately overwritten, depending on compiler
10926 behavior. Nevertheless, because the memset()'s purpose is to make
10927 sure that any other cell-handling bugs can't expose bytes to the
10928 network, we need to fix it. Fixes bug 22737; bugfix on
10929 0.2.4.11-alpha. Fixes CID 1401591.
10932 Changes in version 0.3.1.3-alpha - 2017-06-08
10933 Tor 0.3.1.3-alpha fixes a pair of bugs that would allow an attacker to
10934 remotely crash a hidden service with an assertion failure. Anyone
10935 running a hidden service should upgrade to this version, or to some
10936 other version with fixes for TROVE-2017-004 and TROVE-2017-005.
10938 Tor 0.3.1.3-alpha also includes fixes for several key management bugs
10939 that sometimes made relays unreliable, as well as several other
10940 bugfixes described below.
10942 o Major bugfixes (hidden service, relay, security):
10943 - Fix a remotely triggerable assertion failure when a hidden service
10944 handles a malformed BEGIN cell. Fixes bug 22493, tracked as
10945 TROVE-2017-004 and as CVE-2017-0375; bugfix on 0.3.0.1-alpha.
10946 - Fix a remotely triggerable assertion failure caused by receiving a
10947 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
10948 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
10951 o Major bugfixes (relay, link handshake):
10952 - When performing the v3 link handshake on a TLS connection, report
10953 that we have the x509 certificate that we actually used on that
10954 connection, even if we have changed certificates since that
10955 connection was first opened. Previously, we would claim to have
10956 used our most recent x509 link certificate, which would sometimes
10957 make the link handshake fail. Fixes one case of bug 22460; bugfix
10960 o Major bugfixes (relays, key management):
10961 - Regenerate link and authentication certificates whenever the key
10962 that signs them changes; also, regenerate link certificates
10963 whenever the signed key changes. Previously, these processes were
10964 only weakly coupled, and we relays could (for minutes to hours)
10965 wind up with an inconsistent set of keys and certificates, which
10966 other relays would not accept. Fixes two cases of bug 22460;
10967 bugfix on 0.3.0.1-alpha.
10968 - When sending an Ed25519 signing->link certificate in a CERTS cell,
10969 send the certificate that matches the x509 certificate that we
10970 used on the TLS connection. Previously, there was a race condition
10971 if the TLS context rotated after we began the TLS handshake but
10972 before we sent the CERTS cell. Fixes a case of bug 22460; bugfix
10975 o Major bugfixes (torrc, crash):
10976 - Fix a crash bug when using %include in torrc. Fixes bug 22417;
10977 bugfix on 0.3.1.1-alpha. Patch by Daniel Pinto.
10979 o Minor features (code style):
10980 - Add "Falls through" comments to our codebase, in order to silence
10981 GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
10982 Stieger. Closes ticket 22446.
10984 o Minor features (diagnostic):
10985 - Add logging messages to try to diagnose a rare bug that seems to
10986 generate RSA->Ed25519 cross-certificates dated in the 1970s. We
10987 think this is happening because of incorrect system clocks, but
10988 we'd like to know for certain. Diagnostic for bug 22466.
10990 o Minor bugfixes (correctness):
10991 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
10992 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
10994 o Minor bugfixes (directory protocol):
10995 - Check for libzstd >= 1.1, because older versions lack the
10996 necessary streaming API. Fixes bug 22413; bugfix on 0.3.1.1-alpha.
10998 o Minor bugfixes (link handshake):
10999 - Lower the lifetime of the RSA->Ed25519 cross-certificate to six
11000 months, and regenerate it when it is within one month of expiring.
11001 Previously, we had generated this certificate at startup with a
11002 ten-year lifetime, but that could lead to weird behavior when Tor
11003 was started with a grossly inaccurate clock. Mitigates bug 22466;
11004 mitigation on 0.3.0.1-alpha.
11006 o Minor bugfixes (storage directories):
11007 - Always check for underflows in the cached storage directory usage.
11008 If the usage does underflow, re-calculate it. Also, avoid a
11009 separate underflow when the usage is not known. Fixes bug 22424;
11010 bugfix on 0.3.1.1-alpha.
11012 o Minor bugfixes (unit tests):
11013 - The unit tests now pass on systems where localhost is misconfigured
11014 to some IPv4 address other than 127.0.0.1. Fixes bug 6298; bugfix
11018 - Clarify the manpage for the (deprecated) torify script. Closes
11021 Changes in version 0.3.0.8 - 2017-06-08
11022 Tor 0.3.0.8 fixes a pair of bugs that would allow an attacker to
11023 remotely crash a hidden service with an assertion failure. Anyone
11024 running a hidden service should upgrade to this version, or to some
11025 other version with fixes for TROVE-2017-004 and TROVE-2017-005.
11027 Tor 0.3.0.8 also includes fixes for several key management bugs
11028 that sometimes made relays unreliable, as well as several other
11029 bugfixes described below.
11031 o Major bugfixes (hidden service, relay, security, backport
11032 from 0.3.1.3-alpha):
11033 - Fix a remotely triggerable assertion failure when a hidden service
11034 handles a malformed BEGIN cell. Fixes bug 22493, tracked as
11035 TROVE-2017-004 and as CVE-2017-0375; bugfix on 0.3.0.1-alpha.
11036 - Fix a remotely triggerable assertion failure caused by receiving a
11037 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
11038 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
11041 o Major bugfixes (relay, link handshake, backport from 0.3.1.3-alpha):
11042 - When performing the v3 link handshake on a TLS connection, report
11043 that we have the x509 certificate that we actually used on that
11044 connection, even if we have changed certificates since that
11045 connection was first opened. Previously, we would claim to have
11046 used our most recent x509 link certificate, which would sometimes
11047 make the link handshake fail. Fixes one case of bug 22460; bugfix
11050 o Major bugfixes (relays, key management, backport from 0.3.1.3-alpha):
11051 - Regenerate link and authentication certificates whenever the key
11052 that signs them changes; also, regenerate link certificates
11053 whenever the signed key changes. Previously, these processes were
11054 only weakly coupled, and we relays could (for minutes to hours)
11055 wind up with an inconsistent set of keys and certificates, which
11056 other relays would not accept. Fixes two cases of bug 22460;
11057 bugfix on 0.3.0.1-alpha.
11058 - When sending an Ed25519 signing->link certificate in a CERTS cell,
11059 send the certificate that matches the x509 certificate that we
11060 used on the TLS connection. Previously, there was a race condition
11061 if the TLS context rotated after we began the TLS handshake but
11062 before we sent the CERTS cell. Fixes a case of bug 22460; bugfix
11065 o Major bugfixes (hidden service v3, backport from 0.3.1.1-alpha):
11066 - Stop rejecting v3 hidden service descriptors because their size
11067 did not match an old padding rule. Fixes bug 22447; bugfix on
11070 o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
11071 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
11072 December 2016 (of which ~126 were still functional) with a list of
11073 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
11074 2017. Resolves ticket 21564.
11076 o Minor bugfixes (configuration, backport from 0.3.1.1-alpha):
11077 - Do not crash when starting with LearnCircuitBuildTimeout 0. Fixes
11078 bug 22252; bugfix on 0.2.9.3-alpha.
11080 o Minor bugfixes (correctness, backport from 0.3.1.3-alpha):
11081 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
11082 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
11084 o Minor bugfixes (link handshake, backport from 0.3.1.3-alpha):
11085 - Lower the lifetime of the RSA->Ed25519 cross-certificate to six
11086 months, and regenerate it when it is within one month of expiring.
11087 Previously, we had generated this certificate at startup with a
11088 ten-year lifetime, but that could lead to weird behavior when Tor
11089 was started with a grossly inaccurate clock. Mitigates bug 22466;
11090 mitigation on 0.3.0.1-alpha.
11092 o Minor bugfixes (memory leak, directory authority, backport from
11094 - When directory authorities reject a router descriptor due to
11095 keypinning, free the router descriptor rather than leaking the
11096 memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
11099 Changes in version 0.2.9.11 - 2017-06-08
11100 Tor 0.2.9.11 backports a fix for a bug that would allow an attacker to
11101 remotely crash a hidden service with an assertion failure. Anyone
11102 running a hidden service should upgrade to this version, or to some
11103 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
11104 are not affected by TROVE-2017-004.)
11106 Tor 0.2.9.11 also backports fixes for several key management bugs
11107 that sometimes made relays unreliable, as well as several other
11108 bugfixes described below.
11110 o Major bugfixes (hidden service, relay, security, backport
11111 from 0.3.1.3-alpha):
11112 - Fix a remotely triggerable assertion failure caused by receiving a
11113 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
11114 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
11117 o Major bugfixes (relay, link handshake, backport from 0.3.1.3-alpha):
11118 - When performing the v3 link handshake on a TLS connection, report
11119 that we have the x509 certificate that we actually used on that
11120 connection, even if we have changed certificates since that
11121 connection was first opened. Previously, we would claim to have
11122 used our most recent x509 link certificate, which would sometimes
11123 make the link handshake fail. Fixes one case of bug 22460; bugfix
11126 o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
11127 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
11128 December 2016 (of which ~126 were still functional) with a list of
11129 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
11130 2017. Resolves ticket 21564.
11132 o Minor features (future-proofing, backport from 0.3.0.7):
11133 - Tor no longer refuses to download microdescriptors or descriptors if
11134 they are listed as "published in the future". This change will
11135 eventually allow us to stop listing meaningful "published" dates
11136 in microdescriptor consensuses, and thereby allow us to reduce the
11137 resources required to download consensus diffs by over 50%.
11138 Implements part of ticket 21642; implements part of proposal 275.
11140 o Minor features (directory authorities, backport from 0.3.0.4-rc)
11141 - Directory authorities now reject relays running versions
11142 0.2.9.1-alpha through 0.2.9.4-alpha, because those relays
11143 suffer from bug 20499 and don't keep their consensus cache
11144 up-to-date. Resolves ticket 20509.
11146 o Minor features (geoip):
11147 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
11150 o Minor bugfixes (control port, backport from 0.3.0.6):
11151 - The GETINFO extra-info/digest/<digest> command was broken because
11152 of a wrong base16 decode return value check, introduced when
11153 refactoring that API. Fixes bug 22034; bugfix on 0.2.9.1-alpha.
11155 o Minor bugfixes (correctness, backport from 0.3.1.3-alpha):
11156 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
11157 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
11159 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.0.7):
11160 - The getpid() system call is now permitted under the Linux seccomp2
11161 sandbox, to avoid crashing with versions of OpenSSL (and other
11162 libraries) that attempt to learn the process's PID by using the
11163 syscall rather than the VDSO code. Fixes bug 21943; bugfix
11166 o Minor bugfixes (memory leak, directory authority, backport
11167 from 0.3.1.2-alpha):
11168 - When directory authorities reject a router descriptor due to
11169 keypinning, free the router descriptor rather than leaking the
11170 memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
11172 Changes in version 0.2.8.14 - 2017-06-08
11173 Tor 0.2.7.8 backports a fix for a bug that would allow an attacker to
11174 remotely crash a hidden service with an assertion failure. Anyone
11175 running a hidden service should upgrade to this version, or to some
11176 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
11177 are not affected by TROVE-2017-004.)
11179 o Major bugfixes (hidden service, relay, security):
11180 - Fix a remotely triggerable assertion failure caused by receiving a
11181 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
11182 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
11185 o Minor features (geoip):
11186 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
11189 o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
11190 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
11191 December 2016 (of which ~126 were still functional) with a list of
11192 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
11193 2017. Resolves ticket 21564.
11195 o Minor bugfixes (correctness):
11196 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
11197 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
11199 Changes in version 0.2.7.8 - 2017-06-08
11200 Tor 0.2.7.8 backports a fix for a bug that would allow an attacker to
11201 remotely crash a hidden service with an assertion failure. Anyone
11202 running a hidden service should upgrade to this version, or to some
11203 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
11204 are not affected by TROVE-2017-004.)
11206 o Major bugfixes (hidden service, relay, security):
11207 - Fix a remotely triggerable assertion failure caused by receiving a
11208 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
11209 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
11212 o Minor features (geoip):
11213 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
11216 o Minor bugfixes (correctness):
11217 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
11218 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
11221 Changes in version 0.2.6.12 - 2017-06-08
11222 Tor 0.2.6.12 backports a fix for a bug that would allow an attacker to
11223 remotely crash a hidden service with an assertion failure. Anyone
11224 running a hidden service should upgrade to this version, or to some
11225 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
11226 are not affected by TROVE-2017-004.)
11228 o Major bugfixes (hidden service, relay, security):
11229 - Fix a remotely triggerable assertion failure caused by receiving a
11230 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
11231 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
11234 o Minor features (geoip):
11235 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
11238 o Minor bugfixes (correctness):
11239 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
11240 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
11242 Changes in version 0.2.5.14 - 2017-06-08
11243 Tor 0.2.5.14 backports a fix for a bug that would allow an attacker to
11244 remotely crash a hidden service with an assertion failure. Anyone
11245 running a hidden service should upgrade to this version, or to some
11246 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
11247 are not affected by TROVE-2017-004.)
11249 o Major bugfixes (hidden service, relay, security):
11250 - Fix a remotely triggerable assertion failure caused by receiving a
11251 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
11252 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
11255 o Minor features (geoip):
11256 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
11259 o Minor bugfixes (correctness):
11260 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
11261 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
11263 Changes in version 0.2.4.29 - 2017-06-08
11264 Tor 0.2.4.29 backports a fix for a bug that would allow an attacker to
11265 remotely crash a hidden service with an assertion failure. Anyone
11266 running a hidden service should upgrade to this version, or to some
11267 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
11268 are not affected by TROVE-2017-004.)
11270 o Major bugfixes (hidden service, relay, security):
11271 - Fix a remotely triggerable assertion failure caused by receiving a
11272 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
11273 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
11276 o Minor features (geoip):
11277 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
11280 o Minor bugfixes (correctness):
11281 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
11282 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
11285 Changes in version 0.3.1.2-alpha - 2017-05-26
11286 Tor 0.3.1.2-alpha is the second release in the 0.3.1.x series. It
11287 fixes a few bugs found while testing 0.3.1.1-alpha, including a
11288 memory corruption bug that affected relay stability.
11290 o Major bugfixes (crash, relay):
11291 - Fix a memory-corruption bug in relays that set MyFamily.
11292 Previously, they would double-free MyFamily elements when making
11293 the next descriptor or when changing their configuration. Fixes
11294 bug 22368; bugfix on 0.3.1.1-alpha.
11296 o Minor bugfixes (logging):
11297 - Log a better message when a directory authority replies to an
11298 upload with an unexpected status code. Fixes bug 11121; bugfix
11301 o Minor bugfixes (memory leak, directory authority):
11302 - When directory authorities reject a router descriptor due to
11303 keypinning, free the router descriptor rather than leaking the
11304 memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
11307 Changes in version 0.3.1.1-alpha - 2017-05-22
11308 Tor 0.3.1.1-alpha is the first release in the 0.3.1.x series. It
11309 reduces the bandwidth usage for Tor's directory protocol, adds some
11310 basic padding to resist netflow-based traffic analysis and to serve as
11311 the basis of other padding in the future, and adds rust support to the
11314 It also contains numerous other small features and improvements to
11315 security, correctness, and performance.
11317 Below are the changes since 0.3.0.7.
11319 o Major features (directory protocol):
11320 - Tor relays and authorities can now serve clients an abbreviated
11321 version of the consensus document, containing only the changes
11322 since an older consensus document that the client holds. Clients
11323 now request these documents when available. When both client and
11324 server use this new protocol, they will use far less bandwidth (up
11325 to 94% less) to keep the client's consensus up-to-date. Implements
11326 proposal 140; closes ticket 13339. Based on work by Daniel Martí.
11327 - Tor can now compress directory traffic with lzma or with zstd
11328 compression algorithms, which can deliver better bandwidth
11329 performance. Because lzma is computationally expensive, it's only
11330 used for documents that can be compressed once and served many
11331 times. Support for these algorithms requires that tor is built
11332 with the libzstd and/or liblzma libraries available. Implements
11333 proposal 278; closes ticket 21662.
11334 - Relays now perform the more expensive compression operations, and
11335 consensus diff generation, in worker threads. This separation
11336 avoids delaying the main thread when a new consensus arrives.
11338 o Major features (experimental):
11339 - Tor can now build modules written in Rust. To turn this on, pass
11340 the "--enable-rust" flag to the configure script. It's not time to
11341 get excited yet: currently, there is no actual Rust functionality
11342 beyond some simple glue code, and a notice at startup to tell you
11343 that Rust is running. Still, we hope that programmers and
11344 packagers will try building Tor with Rust support, so that we can
11345 find issues and solve portability problems. Closes ticket 22106.
11347 o Major features (traffic analysis resistance):
11348 - Connections between clients and relays now send a padding cell in
11349 each direction every 1.5 to 9.5 seconds (tunable via consensus
11350 parameters). This padding will not resist specialized
11351 eavesdroppers, but it should be enough to make many ISPs' routine
11352 network flow logging less useful in traffic analysis against
11355 Padding is negotiated using Tor's link protocol, so both relays
11356 and clients must upgrade for this to take effect. Clients may
11357 still send padding despite the relay's version by setting
11358 ConnectionPadding 1 in torrc, and may disable padding by setting
11359 ConnectionPadding 0 in torrc. Padding may be minimized for mobile
11360 users with the torrc option ReducedConnectionPadding. Implements
11361 Proposal 251 and Section 2 of Proposal 254; closes ticket 16861.
11362 - Relays will publish 24 hour totals of padding and non-padding cell
11363 counts to their extra-info descriptors, unless PaddingStatistics 0
11364 is set in torrc. These 24 hour totals are also rounded to
11365 multiples of 10000.
11367 o Major bugfixes (connection usage):
11368 - We use NETINFO cells to try to determine if both relays involved
11369 in a connection will agree on the canonical status of that
11370 connection. We prefer the connections where this is the case for
11371 extend cells, and try to close connections where relays disagree
11372 on their canonical status early. Also, we now prefer the oldest
11373 valid connection for extend cells. These two changes should reduce
11374 the number of long-term connections that are kept open between
11375 relays. Fixes bug 17604; bugfix on 0.2.5.5-alpha.
11376 - Relays now log hourly statistics (look for
11377 "channel_check_for_duplicates" lines) on the total number of
11378 connections to other relays. If the number of connections per
11379 relay is unexpectedly large, this log message is at notice level.
11380 Otherwise it is at info.
11382 o Major bugfixes (entry guards):
11383 - Don't block bootstrapping when a primary bridge is offline and we
11384 can't get its descriptor. Fixes bug 22325; fixes one case of bug
11385 21969; bugfix on 0.3.0.3-alpha.
11387 o Major bugfixes (linux TPROXY support):
11388 - Fix a typo that had prevented TPROXY-based transparent proxying
11389 from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
11390 Patch from "d4fq0fQAgoJ".
11392 o Minor features (security, windows):
11393 - Enable a couple of pieces of Windows hardening: one
11394 (HeapEnableTerminationOnCorruption) that has been on-by-default
11395 since Windows 8, and unavailable before Windows 7; and one
11396 (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
11397 affect us, but shouldn't do any harm. Closes ticket 21953.
11399 o Minor features (config options):
11400 - Allow "%include" directives in torrc configuration files. These
11401 directives import the settings from other files, or from all the
11402 files in a directory. Closes ticket 1922. Code by Daniel Pinto.
11403 - Make SAVECONF return an error when overwriting a torrc that has
11404 includes. Using SAVECONF with the FORCE option will allow it to
11405 overwrite torrc even if includes are used. Related to ticket 1922.
11406 - Add "GETINFO config-can-saveconf" to tell controllers if SAVECONF
11407 will work without the FORCE option. Related to ticket 1922.
11409 o Minor features (controller):
11410 - Warn the first time that a controller requests data in the long-
11411 deprecated 'GETINFO network-status' format. Closes ticket 21703.
11413 o Minor features (defaults):
11414 - The default value for UseCreateFast is now 0: clients which
11415 haven't yet received a consensus document will now use a proper
11416 ntor handshake to talk to their directory servers whenever they
11417 can. Closes ticket 21407.
11418 - Onion key rotation and expiry intervals are now defined as a
11419 network consensus parameter, per proposal 274. The default
11420 lifetime of an onion key is increased from 7 to 28 days. Old onion
11421 keys will expire after 7 days by default. This change will make
11422 consensus diffs much smaller, and save significant bandwidth.
11423 Closes ticket 21641.
11425 o Minor features (fallback directory list):
11426 - Update the fallback directory mirror whitelist and blacklist based
11427 on operator emails. Closes task 21121.
11428 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
11429 December 2016 (of which ~126 were still functional) with a list of
11430 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
11431 2017. Resolves ticket 21564.
11433 o Minor features (hidden services, logging):
11434 - Log a message when a hidden service descriptor has fewer
11435 introduction points than specified in
11436 HiddenServiceNumIntroductionPoints. Closes tickets 21598.
11437 - Log a message when a hidden service reaches its introduction point
11438 circuit limit, and when that limit is reset. Follow up to ticket
11439 21594; closes ticket 21622.
11440 - Warn user if multiple entries in EntryNodes and at least one
11441 HiddenService are used together. Pinning EntryNodes along with a
11442 hidden service can be possibly harmful; for instance see ticket
11443 14917 or 21155. Closes ticket 21155.
11445 o Minor features (linux seccomp2 sandbox):
11446 - We now have a document storage backend compatible with the Linux
11447 seccomp2 sandbox. This backend is used for consensus documents and
11448 diffs between them; in the long term, we'd like to use it for
11449 unparseable directory material too. Closes ticket 21645
11450 - Increase the maximum allowed size passed to mprotect(PROT_WRITE)
11451 from 1MB to 16MB. This was necessary with the glibc allocator in
11452 order to allow worker threads to allocate more memory -- which in
11453 turn is necessary because of our new use of worker threads for
11454 compression. Closes ticket 22096.
11456 o Minor features (logging):
11457 - Log files are no longer created world-readable by default.
11458 (Previously, most distributors would store the logs in a non-
11459 world-readable location to prevent inappropriate access. This
11460 change is an extra precaution.) Closes ticket 21729; patch
11463 o Minor features (performance):
11464 - Our Keccak (SHA-3) implementation now accesses memory more
11465 efficiently, especially on little-endian systems. Closes
11467 - Add an O(1) implementation of channel_find_by_global_id(), to
11468 speed some controller functions.
11470 o Minor features (relay, configuration):
11471 - The MyFamily option may now be repeated as many times as desired,
11472 for relays that want to configure large families. Closes ticket
11473 4998; patch by Daniel Pinto.
11475 o Minor features (safety):
11476 - Add an explicit check to extrainfo_parse_entry_from_string() for
11477 NULL inputs. We don't believe this can actually happen, but it may
11478 help silence a warning from the Clang analyzer. Closes
11481 o Minor features (testing):
11482 - Add a "--disable-memory-sentinels" feature to help with fuzzing.
11483 When Tor is compiled with this option, we disable a number of
11484 redundant memory-safety failsafes that are intended to stop bugs
11485 from becoming security issues. This makes it easier to hunt for
11486 bugs that would be security issues without the failsafes turned
11487 on. Closes ticket 21439.
11488 - Add a general event-tracing instrumentation support to Tor. This
11489 subsystem will enable developers and researchers to add fine-
11490 grained instrumentation to their Tor instances, for use when
11491 examining Tor network performance issues. There are no trace
11492 events yet, and event-tracing is off by default unless enabled at
11493 compile time. Implements ticket 13802.
11494 - Improve our version parsing tests: add tests for typical version
11495 components, add tests for invalid versions, including numeric
11496 range and non-numeric prefixes. Unit tests 21278, 21450, and
11497 21507. Partially implements 21470.
11499 o Minor bugfixes (bandwidth accounting):
11500 - Roll over monthly accounting at the configured hour and minute,
11501 rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
11502 Found by Andrey Karpov with PVS-Studio.
11504 o Minor bugfixes (code correctness):
11505 - Accurately identify client connections by their lack of peer
11506 authentication. This means that we bail out earlier if asked to
11507 extend to a client. Follow-up to 21407. Fixes bug 21406; bugfix
11510 o Minor bugfixes (configuration):
11511 - Do not crash when starting with LearnCircuitBuildTimeout 0. Fixes
11512 bug 22252; bugfix on 0.2.9.3-alpha.
11514 o Minor bugfixes (connection lifespan):
11515 - Allow more control over how long TLS connections are kept open:
11516 unify CircuitIdleTimeout and PredictedPortsRelevanceTime into a
11517 single option called CircuitsAvailableTimeout. Also, allow the
11518 consensus to control the default values for both this preference
11519 and the lifespan of relay-to-relay connections. Fixes bug 17592;
11520 bugfix on 0.2.5.5-alpha.
11521 - Increase the initial circuit build timeout testing frequency, to
11522 help ensure that ReducedConnectionPadding clients finish learning
11523 a timeout before their orconn would expire. The initial testing
11524 rate was set back in the days of TAP and before the Tor Browser
11525 updater, when we had to be much more careful about new clients
11526 making lots of circuits. With this change, a circuit build timeout
11527 is learned in about 15-20 minutes, instead of 100-120 minutes.
11529 o Minor bugfixes (controller):
11530 - GETINFO onions/current and onions/detached no longer respond with
11531 551 on empty lists. Fixes bug 21329; bugfix on 0.2.7.1-alpha.
11532 - Trigger HS descriptor events on the control port when the client
11533 fails to pick a hidden service directory for a hidden service.
11534 This can happen if all the hidden service directories are in
11535 ExcludeNodes, or they have all been queried within the last 15
11536 minutes. Fixes bug 22042; bugfix on 0.2.5.2-alpha.
11538 o Minor bugfixes (directory authority):
11539 - When rejecting a router descriptor for running an obsolete version
11540 of Tor without ntor support, warn about the obsolete tor version,
11541 not the missing ntor key. Fixes bug 20270; bugfix on 0.2.9.3-alpha.
11542 - Prevent the shared randomness subsystem from asserting when
11543 initialized by a bridge authority with an incomplete configuration
11544 file. Fixes bug 21586; bugfix on 0.2.9.8.
11546 o Minor bugfixes (exit-side DNS):
11547 - Fix an untriggerable assertion that checked the output of a
11548 libevent DNS error, so that the assertion actually behaves as
11549 expected. Fixes bug 22244; bugfix on 0.2.0.20-rc. Found by Andrey
11550 Karpov using PVS-Studio.
11552 o Minor bugfixes (fallback directories):
11553 - Make the usage example in updateFallbackDirs.py actually work, and
11554 explain what it does. Fixes bug 22270; bugfix on 0.3.0.3-alpha.
11555 - Decrease the guard flag average required to be a fallback. This
11556 allows us to keep relays that have their guard flag removed when
11557 they restart. Fixes bug 20913; bugfix on 0.2.8.1-alpha.
11558 - Decrease the minimum number of fallbacks to 100. Fixes bug 20913;
11559 bugfix on 0.2.8.1-alpha.
11560 - Make sure fallback directory mirrors have the same address, port,
11561 and relay identity key for at least 30 days before they are
11562 selected. Fixes bug 20913; bugfix on 0.2.8.1-alpha.
11564 o Minor bugfixes (hidden services):
11565 - Stop printing a cryptic warning when a hidden service gets a
11566 request to connect to a virtual port that it hasn't configured.
11567 Fixes bug 16706; bugfix on 0.2.6.3-alpha.
11568 - Simplify hidden service descriptor creation by using an existing
11569 flag to check if an introduction point is established. Fixes bug
11570 21599; bugfix on 0.2.7.2-alpha.
11572 o Minor bugfixes (memory leak):
11573 - Fix a small memory leak at exit from the backtrace handler code.
11574 Fixes bug 21788; bugfix on 0.2.5.2-alpha. Patch from Daniel Pinto.
11576 o Minor bugfixes (protocol, logging):
11577 - Downgrade a log statement about unexpected relay cells from "bug"
11578 to "protocol warning", because there is at least one use case
11579 where it can be triggered by a buggy tor implementation. Fixes bug
11580 21293; bugfix on 0.1.1.14-alpha.
11582 o Minor bugfixes (testing):
11583 - Use unbuffered I/O for utility functions around the
11584 process_handle_t type. This fixes unit test failures reported on
11585 OpenBSD and FreeBSD. Fixes bug 21654; bugfix on 0.2.3.1-alpha.
11586 - Make display of captured unit test log messages consistent. Fixes
11587 bug 21510; bugfix on 0.2.9.3-alpha.
11588 - Make test-network.sh always call chutney's test-network.sh.
11589 Previously, this only worked on systems which had bash installed,
11590 due to some bash-specific code in the script. Fixes bug 19699;
11591 bugfix on 0.3.0.4-rc. Follow-up to ticket 21581.
11593 o Minor bugfixes (voting consistency):
11594 - Reject version numbers with non-numeric prefixes (such as +, -, or
11595 whitespace). Disallowing whitespace prevents differential version
11596 parsing between POSIX-based and Windows platforms. Fixes bug 21507
11597 and part of 21508; bugfix on 0.0.8pre1.
11599 o Minor bugfixes (windows, relay):
11600 - Resolve "Failure from drain_fd: No error" warnings on Windows
11601 relays. Fixes bug 21540; bugfix on 0.2.6.3-alpha.
11603 o Code simplification and refactoring:
11604 - Break up the 630-line function connection_dir_client_reached_eof()
11605 into a dozen smaller functions. This change should help
11606 maintainability and readability of the client directory code.
11607 - Isolate our use of the openssl headers so that they are only
11608 included from our crypto wrapper modules, and from tests that
11609 examine those modules' internals. Closes ticket 21841.
11610 - Simplify our API to launch directory requests, making it more
11611 extensible and less error-prone. Now it's easier to add extra
11612 headers to directory requests. Closes ticket 21646.
11613 - Our base64 decoding functions no longer overestimate the output
11614 space that they need when parsing unpadded inputs. Closes
11616 - Remove unused "ROUTER_ADDED_NOTIFY_GENERATOR" internal value.
11617 Resolves ticket 22213.
11618 - The logic that directory caches use to spool request to clients,
11619 serving them one part at a time so as not to allocate too much
11620 memory, has been refactored for consistency. Previously there was
11621 a separate spooling implementation per type of spoolable data. Now
11622 there is one common spooling implementation, with extensible data
11623 types. Closes ticket 21651.
11624 - Tor's compression module now supports multiple backends. Part of
11625 the implementation for proposal 278; closes ticket 21663.
11628 - Clarify the behavior of the KeepAliveIsolateSOCKSAuth sub-option.
11629 Closes ticket 21873.
11630 - Correct documentation about the default DataDirectory value.
11631 Closes ticket 21151.
11632 - Document the default behavior of NumEntryGuards and
11633 NumDirectoryGuards correctly. Fixes bug 21715; bugfix
11635 - Document key=value pluggable transport arguments for Bridge lines
11636 in torrc. Fixes bug 20341; bugfix on 0.2.5.1-alpha.
11637 - Note that bandwidth-limiting options don't affect TCP headers or
11638 DNS. Closes ticket 17170.
11640 o Removed features (configuration options, all in ticket 22060):
11641 - These configuration options are now marked Obsolete, and no longer
11642 have any effect: AllowInvalidNodes, AllowSingleHopCircuits,
11643 AllowSingleHopExits, ExcludeSingleHopRelays, FastFirstHopPK,
11644 TLSECGroup, WarnUnsafeSocks. They were first marked as deprecated
11645 in 0.2.9.2-alpha and have now been removed. The previous default
11646 behavior is now always chosen; the previous (less secure) non-
11647 default behavior is now unavailable.
11648 - CloseHSClientCircuitsImmediatelyOnTimeout and
11649 CloseHSServiceRendCircuitsImmediatelyOnTimeout were deprecated in
11650 0.2.9.2-alpha and now have been removed. HS circuits never close
11651 on circuit build timeout; they have a longer timeout period.
11652 - {Control,DNS,Dir,Socks,Trans,NATD,OR}ListenAddress were deprecated
11653 in 0.2.9.2-alpha and now have been removed. Use the ORPort option
11654 (and others) to configure listen-only and advertise-only addresses.
11656 o Removed features (tools):
11657 - We've removed the tor-checkkey tool from src/tools. Long ago, we
11658 used it to help people detect RSA keys that were generated by
11659 versions of Debian affected by CVE-2008-0166. But those keys have
11660 been out of circulation for ages, and this tool is no longer
11661 required. Closes ticket 21842.
11664 Changes in version 0.3.0.7 - 2017-05-15
11665 Tor 0.3.0.7 fixes a medium-severity security bug in earlier versions
11666 of Tor 0.3.0.x, where an attacker could cause a Tor relay process
11667 to exit. Relays running earlier versions of Tor 0.3.0.x should upgrade;
11668 clients are not affected.
11670 o Major bugfixes (hidden service directory, security):
11671 - Fix an assertion failure in the hidden service directory code, which
11672 could be used by an attacker to remotely cause a Tor relay process to
11673 exit. Relays running earlier versions of Tor 0.3.0.x should upgrade.
11674 should upgrade. This security issue is tracked as TROVE-2017-002.
11675 Fixes bug 22246; bugfix on 0.3.0.1-alpha.
11678 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
11681 o Minor features (future-proofing):
11682 - Tor no longer refuses to download microdescriptors or descriptors
11683 if they are listed as "published in the future". This change will
11684 eventually allow us to stop listing meaningful "published" dates
11685 in microdescriptor consensuses, and thereby allow us to reduce the
11686 resources required to download consensus diffs by over 50%.
11687 Implements part of ticket 21642; implements part of proposal 275.
11689 o Minor bugfixes (Linux seccomp2 sandbox):
11690 - The getpid() system call is now permitted under the Linux seccomp2
11691 sandbox, to avoid crashing with versions of OpenSSL (and other
11692 libraries) that attempt to learn the process's PID by using the
11693 syscall rather than the VDSO code. Fixes bug 21943; bugfix
11697 Changes in version 0.3.0.6 - 2017-04-26
11698 Tor 0.3.0.6 is the first stable release of the Tor 0.3.0 series.
11700 With the 0.3.0 series, clients and relays now use Ed25519 keys to
11701 authenticate their link connections to relays, rather than the old
11702 RSA1024 keys that they used before. (Circuit crypto has been
11703 Curve25519-authenticated since 0.2.4.8-alpha.) We have also replaced
11704 the guard selection and replacement algorithm to behave more robustly
11705 in the presence of unreliable networks, and to resist guard-
11708 This series also includes numerous other small features and bugfixes,
11709 along with more groundwork for the upcoming hidden-services revamp.
11711 Per our stable release policy, we plan to support the Tor 0.3.0
11712 release series for at least the next nine months, or for three months
11713 after the first stable release of the 0.3.1 series: whichever is
11714 longer. If you need a release with long-term support, we recommend
11715 that you stay with the 0.2.9 series.
11717 Below are the changes since 0.3.0.5-rc. For a list of all changes
11718 since 0.2.9, see the ReleaseNotes file.
11720 o Minor features (geoip):
11721 - Update geoip and geoip6 to the April 4 2017 Maxmind GeoLite2
11724 o Minor bugfixes (control port):
11725 - The GETINFO extra-info/digest/<digest> command was broken because
11726 of a wrong base16 decode return value check, introduced when
11727 refactoring that API. Fixes bug 22034; bugfix on 0.2.9.1-alpha.
11729 o Minor bugfixes (crash prevention):
11730 - Fix a (currently untriggerable, but potentially dangerous) crash
11731 bug when base32-encoding inputs whose sizes are not a multiple of
11732 5. Fixes bug 21894; bugfix on 0.2.9.1-alpha.
11735 Changes in version 0.3.0.5-rc - 2017-04-05
11736 Tor 0.3.0.5-rc fixes a few remaining bugs, large and small, in the
11737 0.3.0 release series.
11739 This is the second release candidate in the Tor 0.3.0 series, and has
11740 much fewer changes than the first. If we find no new bugs or
11741 regressions here, the first stable 0.3.0 release will be nearly
11744 o Major bugfixes (crash, directory connections):
11745 - Fix a rare crash when sending a begin cell on a circuit whose
11746 linked directory connection had already been closed. Fixes bug
11747 21576; bugfix on 0.2.9.3-alpha. Reported by Alec Muffett.
11749 o Major bugfixes (guard selection):
11750 - Fix a guard selection bug where Tor would refuse to bootstrap in
11751 some cases if the user swapped a bridge for another bridge in
11752 their configuration file. Fixes bug 21771; bugfix on 0.3.0.1-alpha.
11753 Reported by "torvlnt33r".
11755 o Minor features (geoip):
11756 - Update geoip and geoip6 to the March 7 2017 Maxmind GeoLite2
11759 o Minor bugfix (compilation):
11760 - Fix a warning when compiling hs_service.c. Previously, it had no
11761 exported symbols when compiled for libor.a, resulting in a
11762 compilation warning from clang. Fixes bug 21825; bugfix
11765 o Minor bugfixes (hidden services):
11766 - Make hidden services check for failed intro point connections,
11767 even when they have exceeded their intro point creation limit.
11768 Fixes bug 21596; bugfix on 0.2.7.2-alpha. Reported by Alec Muffett.
11769 - Make hidden services with 8 to 10 introduction points check for
11770 failed circuits immediately after startup. Previously, they would
11771 wait for 5 minutes before performing their first checks. Fixes bug
11772 21594; bugfix on 0.2.3.9-alpha. Reported by Alec Muffett.
11774 o Minor bugfixes (memory leaks):
11775 - Fix a memory leak when using GETCONF on a port option. Fixes bug
11776 21682; bugfix on 0.3.0.3-alpha.
11778 o Minor bugfixes (relay):
11779 - Avoid a double-marked-circuit warning that could happen when we
11780 receive DESTROY cells under heavy load. Fixes bug 20059; bugfix
11783 o Minor bugfixes (tests):
11784 - Run the entry_guard_parse_from_state_full() test with the time set
11785 to a specific date. (The guard state that this test was parsing
11786 contained guards that had expired since the test was first
11787 written.) Fixes bug 21799; bugfix on 0.3.0.1-alpha.
11790 - Update the description of the directory server options in the
11791 manual page, to clarify that a relay no longer needs to set
11792 DirPort in order to be a directory cache. Closes ticket 21720.
11796 Changes in version 0.2.8.13 - 2017-03-03
11797 Tor 0.2.8.13 backports a security fix from later Tor
11798 releases. Anybody running Tor 0.2.8.12 or earlier should upgrade to this
11799 this release, if for some reason they cannot upgrade to a later
11800 release series, and if they build Tor with the --enable-expensive-hardening
11803 Note that support for Tor 0.2.8.x is ending next year: we will not issue
11804 any fixes for the Tor 0.2.8.x series after 1 Jan 2018. If you need
11805 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
11807 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
11808 - Fix an integer underflow bug when comparing malformed Tor
11809 versions. This bug could crash Tor when built with
11810 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
11811 0.2.9.8, which were built with -ftrapv by default. In other cases
11812 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
11813 on 0.0.8pre1. Found by OSS-Fuzz.
11815 o Minor features (geoip):
11816 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
11820 Changes in version 0.2.7.7 - 2017-03-03
11821 Tor 0.2.7.7 backports a number of security fixes from later Tor
11822 releases. Anybody running Tor 0.2.7.6 or earlier should upgrade to
11823 this release, if for some reason they cannot upgrade to a later
11826 Note that support for Tor 0.2.7.x is ending this year: we will not issue
11827 any fixes for the Tor 0.2.7.x series after 1 August 2017. If you need
11828 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
11830 o Directory authority changes (backport from 0.2.8.5-rc):
11831 - Urras is no longer a directory authority. Closes ticket 19271.
11833 o Directory authority changes (backport from 0.2.9.2-alpha):
11834 - The "Tonga" bridge authority has been retired; the new bridge
11835 authority is "Bifroest". Closes tickets 19728 and 19690.
11837 o Directory authority key updates (backport from 0.2.8.1-alpha):
11838 - Update the V3 identity key for the dannenberg directory authority:
11839 it was changed on 18 November 2015. Closes task 17906. Patch
11842 o Major bugfixes (parsing, security, backport from 0.2.9.8):
11843 - Fix a bug in parsing that could cause clients to read a single
11844 byte past the end of an allocated region. This bug could be used
11845 to cause hardened clients (built with --enable-expensive-hardening)
11846 to crash if they tried to visit a hostile hidden service. Non-
11847 hardened clients are only affected depending on the details of
11848 their platform's memory allocator. Fixes bug 21018; bugfix on
11849 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
11850 2016-12-002 and as CVE-2016-1254.
11852 o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
11853 - Stop a crash that could occur when a client running with DNSPort
11854 received a query with multiple address types, and the first
11855 address type was not supported. Found and fixed by Scott Dial.
11856 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
11857 - Prevent a class of security bugs caused by treating the contents
11858 of a buffer chunk as if they were a NUL-terminated string. At
11859 least one such bug seems to be present in all currently used
11860 versions of Tor, and would allow an attacker to remotely crash
11861 most Tor instances, especially those compiled with extra compiler
11862 hardening. With this defense in place, such bugs can't crash Tor,
11863 though we should still fix them as they occur. Closes ticket
11864 20384 (TROVE-2016-10-001).
11866 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
11867 - Avoid a difficult-to-trigger heap corruption attack when extending
11868 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
11869 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
11870 Reported by Guido Vranken.
11872 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
11873 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
11874 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
11876 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
11877 - If OpenSSL fails to generate an RSA key, do not retain a dangling
11878 pointer to the previous (uninitialized) key value. The impact here
11879 should be limited to a difficult-to-trigger crash, if OpenSSL is
11880 running an engine that makes key generation failures possible, or
11881 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
11882 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
11885 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
11886 - Fix an integer underflow bug when comparing malformed Tor
11887 versions. This bug could crash Tor when built with
11888 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
11889 0.2.9.8, which were built with -ftrapv by default. In other cases
11890 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
11891 on 0.0.8pre1. Found by OSS-Fuzz.
11893 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
11894 - Make memwipe() do nothing when passed a NULL pointer or buffer of
11895 zero size. Check size argument to memwipe() for underflow. Fixes
11896 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
11899 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
11900 - Make Tor survive errors involving connections without a
11901 corresponding event object. Previously we'd fail with an
11902 assertion; now we produce a log message. Related to bug 16248.
11904 o Minor features (geoip):
11905 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
11909 Changes in version 0.2.6.11 - 2017-03-03
11910 Tor 0.2.6.11 backports a number of security fixes from later Tor
11911 releases. Anybody running Tor 0.2.6.10 or earlier should upgrade to
11912 this release, if for some reason they cannot upgrade to a later
11915 Note that support for Tor 0.2.6.x is ending this year: we will not issue
11916 any fixes for the Tor 0.2.6.x series after 1 August 2017. If you need
11917 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
11919 o Directory authority changes (backport from 0.2.8.5-rc):
11920 - Urras is no longer a directory authority. Closes ticket 19271.
11922 o Directory authority changes (backport from 0.2.9.2-alpha):
11923 - The "Tonga" bridge authority has been retired; the new bridge
11924 authority is "Bifroest". Closes tickets 19728 and 19690.
11926 o Directory authority key updates (backport from 0.2.8.1-alpha):
11927 - Update the V3 identity key for the dannenberg directory authority:
11928 it was changed on 18 November 2015. Closes task 17906. Patch
11931 o Major features (security fixes, backport from 0.2.9.4-alpha):
11932 - Prevent a class of security bugs caused by treating the contents
11933 of a buffer chunk as if they were a NUL-terminated string. At
11934 least one such bug seems to be present in all currently used
11935 versions of Tor, and would allow an attacker to remotely crash
11936 most Tor instances, especially those compiled with extra compiler
11937 hardening. With this defense in place, such bugs can't crash Tor,
11938 though we should still fix them as they occur. Closes ticket
11939 20384 (TROVE-2016-10-001).
11941 o Major bugfixes (parsing, security, backport from 0.2.9.8):
11942 - Fix a bug in parsing that could cause clients to read a single
11943 byte past the end of an allocated region. This bug could be used
11944 to cause hardened clients (built with --enable-expensive-hardening)
11945 to crash if they tried to visit a hostile hidden service. Non-
11946 hardened clients are only affected depending on the details of
11947 their platform's memory allocator. Fixes bug 21018; bugfix on
11948 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
11949 2016-12-002 and as CVE-2016-1254.
11951 o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
11952 - Stop a crash that could occur when a client running with DNSPort
11953 received a query with multiple address types, and the first
11954 address type was not supported. Found and fixed by Scott Dial.
11955 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
11957 o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
11958 - Fix an error that could cause us to read 4 bytes before the
11959 beginning of an openssl string. This bug could be used to cause
11960 Tor to crash on systems with unusual malloc implementations, or
11961 systems with unusual hardening installed. Fixes bug 17404; bugfix
11964 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
11965 - Avoid a difficult-to-trigger heap corruption attack when extending
11966 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
11967 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
11968 Reported by Guido Vranken.
11970 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
11971 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
11972 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
11974 o Major bugfixes (guard selection, backport from 0.2.7.6):
11975 - Actually look at the Guard flag when selecting a new directory
11976 guard. When we implemented the directory guard design, we
11977 accidentally started treating all relays as if they have the Guard
11978 flag during guard selection, leading to weaker anonymity and worse
11979 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
11982 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
11983 - If OpenSSL fails to generate an RSA key, do not retain a dangling
11984 pointer to the previous (uninitialized) key value. The impact here
11985 should be limited to a difficult-to-trigger crash, if OpenSSL is
11986 running an engine that makes key generation failures possible, or
11987 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
11988 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
11991 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
11992 - Fix an integer underflow bug when comparing malformed Tor
11993 versions. This bug could crash Tor when built with
11994 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
11995 0.2.9.8, which were built with -ftrapv by default. In other cases
11996 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
11997 on 0.0.8pre1. Found by OSS-Fuzz.
11999 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
12000 - Make memwipe() do nothing when passed a NULL pointer or buffer of
12001 zero size. Check size argument to memwipe() for underflow. Fixes
12002 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
12005 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
12006 - Make Tor survive errors involving connections without a
12007 corresponding event object. Previously we'd fail with an
12008 assertion; now we produce a log message. Related to bug 16248.
12010 o Minor features (geoip):
12011 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
12014 o Minor bugfixes (compilation, backport from 0.2.7.6):
12015 - Fix a compilation warning with Clang 3.6: Do not check the
12016 presence of an address which can never be NULL. Fixes bug 17781.
12019 Changes in version 0.2.5.13 - 2017-03-03
12020 Tor 0.2.5.13 backports a number of security fixes from later Tor
12021 releases. Anybody running Tor 0.2.5.13 or earlier should upgrade to
12022 this release, if for some reason they cannot upgrade to a later
12025 Note that support for Tor 0.2.5.x is ending next year: we will not issue
12026 any fixes for the Tor 0.2.5.x series after 1 May 2018. If you need
12027 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
12029 o Directory authority changes (backport from 0.2.8.5-rc):
12030 - Urras is no longer a directory authority. Closes ticket 19271.
12032 o Directory authority changes (backport from 0.2.9.2-alpha):
12033 - The "Tonga" bridge authority has been retired; the new bridge
12034 authority is "Bifroest". Closes tickets 19728 and 19690.
12036 o Directory authority key updates (backport from 0.2.8.1-alpha):
12037 - Update the V3 identity key for the dannenberg directory authority:
12038 it was changed on 18 November 2015. Closes task 17906. Patch
12041 o Major features (security fixes, backport from 0.2.9.4-alpha):
12042 - Prevent a class of security bugs caused by treating the contents
12043 of a buffer chunk as if they were a NUL-terminated string. At
12044 least one such bug seems to be present in all currently used
12045 versions of Tor, and would allow an attacker to remotely crash
12046 most Tor instances, especially those compiled with extra compiler
12047 hardening. With this defense in place, such bugs can't crash Tor,
12048 though we should still fix them as they occur. Closes ticket
12049 20384 (TROVE-2016-10-001).
12051 o Major bugfixes (parsing, security, backport from 0.2.9.8):
12052 - Fix a bug in parsing that could cause clients to read a single
12053 byte past the end of an allocated region. This bug could be used
12054 to cause hardened clients (built with --enable-expensive-hardening)
12055 to crash if they tried to visit a hostile hidden service. Non-
12056 hardened clients are only affected depending on the details of
12057 their platform's memory allocator. Fixes bug 21018; bugfix on
12058 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
12059 2016-12-002 and as CVE-2016-1254.
12061 o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
12062 - Stop a crash that could occur when a client running with DNSPort
12063 received a query with multiple address types, and the first
12064 address type was not supported. Found and fixed by Scott Dial.
12065 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
12067 o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
12068 - Fix an error that could cause us to read 4 bytes before the
12069 beginning of an openssl string. This bug could be used to cause
12070 Tor to crash on systems with unusual malloc implementations, or
12071 systems with unusual hardening installed. Fixes bug 17404; bugfix
12074 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
12075 - Avoid a difficult-to-trigger heap corruption attack when extending
12076 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
12077 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
12078 Reported by Guido Vranken.
12080 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
12081 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
12082 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
12084 o Major bugfixes (guard selection, backport from 0.2.7.6):
12085 - Actually look at the Guard flag when selecting a new directory
12086 guard. When we implemented the directory guard design, we
12087 accidentally started treating all relays as if they have the Guard
12088 flag during guard selection, leading to weaker anonymity and worse
12089 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
12092 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
12093 - If OpenSSL fails to generate an RSA key, do not retain a dangling
12094 pointer to the previous (uninitialized) key value. The impact here
12095 should be limited to a difficult-to-trigger crash, if OpenSSL is
12096 running an engine that makes key generation failures possible, or
12097 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
12098 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
12101 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
12102 - Fix an integer underflow bug when comparing malformed Tor
12103 versions. This bug could crash Tor when built with
12104 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
12105 0.2.9.8, which were built with -ftrapv by default. In other cases
12106 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
12107 on 0.0.8pre1. Found by OSS-Fuzz.
12109 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
12110 - Make memwipe() do nothing when passed a NULL pointer or buffer of
12111 zero size. Check size argument to memwipe() for underflow. Fixes
12112 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
12115 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
12116 - Make Tor survive errors involving connections without a
12117 corresponding event object. Previously we'd fail with an
12118 assertion; now we produce a log message. Related to bug 16248.
12120 o Minor features (geoip):
12121 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
12124 o Minor bugfixes (compilation, backport from 0.2.7.6):
12125 - Fix a compilation warning with Clang 3.6: Do not check the
12126 presence of an address which can never be NULL. Fixes bug 17781.
12128 o Minor bugfixes (crypto error-handling, backport from 0.2.7.2-alpha):
12129 - Check for failures from crypto_early_init, and refuse to continue.
12130 A previous typo meant that we could keep going with an
12131 uninitialized crypto library, and would have OpenSSL initialize
12132 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
12133 when implementing ticket 4900. Patch by "teor".
12135 o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
12136 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
12137 a client authorized hidden service. Fixes bug 15823; bugfix
12141 Changes in version 0.2.4.28 - 2017-03-03
12142 Tor 0.2.4.28 backports a number of security fixes from later Tor
12143 releases. Anybody running Tor 0.2.4.27 or earlier should upgrade to
12144 this release, if for some reason they cannot upgrade to a later
12147 Note that support for Tor 0.2.4.x is ending soon: we will not issue
12148 any fixes for the Tor 0.2.4.x series after 1 August 2017. If you need
12149 a Tor release series with long-term support, we recommend Tor 0.2.9.x.
12151 o Directory authority changes (backport from 0.2.8.5-rc):
12152 - Urras is no longer a directory authority. Closes ticket 19271.
12154 o Directory authority changes (backport from 0.2.9.2-alpha):
12155 - The "Tonga" bridge authority has been retired; the new bridge
12156 authority is "Bifroest". Closes tickets 19728 and 19690.
12158 o Directory authority key updates (backport from 0.2.8.1-alpha):
12159 - Update the V3 identity key for the dannenberg directory authority:
12160 it was changed on 18 November 2015. Closes task 17906. Patch
12163 o Major features (security fixes, backport from 0.2.9.4-alpha):
12164 - Prevent a class of security bugs caused by treating the contents
12165 of a buffer chunk as if they were a NUL-terminated string. At
12166 least one such bug seems to be present in all currently used
12167 versions of Tor, and would allow an attacker to remotely crash
12168 most Tor instances, especially those compiled with extra compiler
12169 hardening. With this defense in place, such bugs can't crash Tor,
12170 though we should still fix them as they occur. Closes ticket
12171 20384 (TROVE-2016-10-001).
12173 o Major bugfixes (parsing, security, backport from 0.2.9.8):
12174 - Fix a bug in parsing that could cause clients to read a single
12175 byte past the end of an allocated region. This bug could be used
12176 to cause hardened clients (built with --enable-expensive-hardening)
12177 to crash if they tried to visit a hostile hidden service. Non-
12178 hardened clients are only affected depending on the details of
12179 their platform's memory allocator. Fixes bug 21018; bugfix on
12180 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
12181 2016-12-002 and as CVE-2016-1254.
12183 o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
12184 - Fix an error that could cause us to read 4 bytes before the
12185 beginning of an openssl string. This bug could be used to cause
12186 Tor to crash on systems with unusual malloc implementations, or
12187 systems with unusual hardening installed. Fixes bug 17404; bugfix
12190 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
12191 - Avoid a difficult-to-trigger heap corruption attack when extending
12192 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
12193 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
12194 Reported by Guido Vranken.
12196 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
12197 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
12198 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
12200 o Major bugfixes (guard selection, backport from 0.2.7.6):
12201 - Actually look at the Guard flag when selecting a new directory
12202 guard. When we implemented the directory guard design, we
12203 accidentally started treating all relays as if they have the Guard
12204 flag during guard selection, leading to weaker anonymity and worse
12205 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
12208 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
12209 - If OpenSSL fails to generate an RSA key, do not retain a dangling
12210 pointer to the previous (uninitialized) key value. The impact here
12211 should be limited to a difficult-to-trigger crash, if OpenSSL is
12212 running an engine that makes key generation failures possible, or
12213 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
12214 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
12217 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
12218 - Fix an integer underflow bug when comparing malformed Tor
12219 versions. This bug could crash Tor when built with
12220 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
12221 0.2.9.8, which were built with -ftrapv by default. In other cases
12222 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
12223 on 0.0.8pre1. Found by OSS-Fuzz.
12225 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
12226 - Make memwipe() do nothing when passed a NULL pointer or buffer of
12227 zero size. Check size argument to memwipe() for underflow. Fixes
12228 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
12231 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
12232 - Make Tor survive errors involving connections without a
12233 corresponding event object. Previously we'd fail with an
12234 assertion; now we produce a log message. Related to bug 16248.
12236 o Minor features (DoS-resistance, backport from 0.2.7.1-alpha):
12237 - Make it harder for attackers to overload hidden services with
12238 introductions, by blocking multiple introduction requests on the
12239 same circuit. Resolves ticket 15515.
12241 o Minor features (geoip):
12242 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
12245 o Minor bugfixes (compilation, backport from 0.2.7.6):
12246 - Fix a compilation warning with Clang 3.6: Do not check the
12247 presence of an address which can never be NULL. Fixes bug 17781.
12249 o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
12250 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
12251 a client authorized hidden service. Fixes bug 15823; bugfix
12255 Changes in version 0.3.0.4-rc - 2017-03-01
12256 Tor 0.3.0.4-rc fixes some remaining bugs, large and small, in the
12257 0.3.0 release series, and introduces a few reliability features to
12258 keep them from coming back.
12260 This is the first release candidate in the Tor 0.3.0 series. If we
12261 find no new bugs or regressions here, the first stable 0.3.0 release
12262 will be nearly identical to it.
12264 o Major bugfixes (bridges):
12265 - When the same bridge is configured multiple times with the same
12266 identity, but at different address:port combinations, treat those
12267 bridge instances as separate guards. This fix restores the ability
12268 of clients to configure the same bridge with multiple pluggable
12269 transports. Fixes bug 21027; bugfix on 0.3.0.1-alpha.
12271 o Major bugfixes (hidden service directory v3):
12272 - Stop crashing on a failed v3 hidden service descriptor lookup
12273 failure. Fixes bug 21471; bugfixes on 0.3.0.1-alpha.
12275 o Major bugfixes (parsing):
12276 - When parsing a malformed content-length field from an HTTP
12277 message, do not read off the end of the buffer. This bug was a
12278 potential remote denial-of-service attack against Tor clients and
12279 relays. A workaround was released in October 2016, to prevent this
12280 bug from crashing Tor. This is a fix for the underlying issue,
12281 which should no longer matter (if you applied the earlier patch).
12282 Fixes bug 20894; bugfix on 0.2.0.16-alpha. Bug found by fuzzing
12283 using AFL (http://lcamtuf.coredump.cx/afl/).
12284 - Fix an integer underflow bug when comparing malformed Tor
12285 versions. This bug could crash Tor when built with
12286 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
12287 0.2.9.8, which were built with -ftrapv by default. In other cases
12288 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
12289 on 0.0.8pre1. Found by OSS-Fuzz.
12291 o Minor feature (protocol versioning):
12292 - Add new protocol version for proposal 224. HSIntro now advertises
12293 version "3-4" and HSDir version "1-2". Fixes ticket 20656.
12295 o Minor features (directory authorities):
12296 - Directory authorities now reject descriptors that claim to be
12297 malformed versions of Tor. Helps prevent exploitation of
12299 - Reject version numbers with components that exceed INT32_MAX.
12300 Otherwise 32-bit and 64-bit platforms would behave inconsistently.
12301 Fixes bug 21450; bugfix on 0.0.8pre1.
12302 - Directory authorities now reject relays running versions
12303 0.2.9.1-alpha through 0.2.9.4-alpha, because those relays
12304 suffer from bug 20499 and don't keep their consensus cache
12305 up-to-date. Resolves ticket 20509.
12307 o Minor features (geoip):
12308 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
12311 o Minor features (reliability, crash):
12312 - Try better to detect problems in buffers where they might grow (or
12313 think they have grown) over 2 GB in size. Diagnostic for
12316 o Minor features (testing):
12317 - During 'make test-network-all', if tor logs any warnings, ask
12318 chutney to output them. Requires a recent version of chutney with
12319 the 21572 patch. Implements 21570.
12321 o Minor bugfixes (certificate expiration time):
12322 - Avoid using link certificates that don't become valid till some
12323 time in the future. Fixes bug 21420; bugfix on 0.2.4.11-alpha
12325 o Minor bugfixes (code correctness):
12326 - Repair a couple of (unreachable or harmless) cases of the risky
12327 comparison-by-subtraction pattern that caused bug 21278.
12328 - Remove a redundant check for the UseEntryGuards option from the
12329 options_transition_affects_guards() function. Fixes bug 21492;
12330 bugfix on 0.3.0.1-alpha.
12332 o Minor bugfixes (directory mirrors):
12333 - Allow relays to use directory mirrors without a DirPort: these
12334 relays need to be contacted over their ORPorts using a begindir
12335 connection. Fixes one case of bug 20711; bugfix on 0.2.8.2-alpha.
12336 - Clarify the message logged when a remote relay is unexpectedly
12337 missing an ORPort or DirPort: users were confusing this with a
12338 local port. Fixes another case of bug 20711; bugfix
12341 o Minor bugfixes (guards):
12342 - Don't warn about a missing guard state on timeout-measurement
12343 circuits: they aren't supposed to be using guards. Fixes an
12344 instance of bug 21007; bugfix on 0.3.0.1-alpha.
12345 - Silence a BUG() warning when attempting to use a guard whose
12346 descriptor we don't know, and make this scenario less likely to
12347 happen. Fixes bug 21415; bugfix on 0.3.0.1-alpha.
12349 o Minor bugfixes (hidden service):
12350 - Pass correct buffer length when encoding legacy ESTABLISH_INTRO
12351 cells. Previously, we were using sizeof() on a pointer, instead of
12352 the real destination buffer. Fortunately, that value was only used
12353 to double-check that there was enough room--which was already
12354 enforced elsewhere. Fixes bug 21553; bugfix on 0.3.0.1-alpha.
12356 o Minor bugfixes (testing):
12357 - Fix Raspbian build issues related to missing socket errno in
12358 test_util.c. Fixes bug 21116; bugfix on 0.2.8.2. Patch
12360 - Rename "make fuzz" to "make test-fuzz-corpora", since it doesn't
12361 actually fuzz anything. Fixes bug 21447; bugfix on 0.3.0.3-alpha.
12362 - Use bash in src/test/test-network.sh. This ensures we reliably
12363 call chutney's newer tools/test-network.sh when available. Fixes
12364 bug 21562; bugfix on 0.2.9.1-alpha.
12367 - Small fixes to the fuzzing documentation. Closes ticket 21472.
12370 Changes in version 0.2.9.10 - 2017-03-01
12371 Tor 0.2.9.10 backports a security fix from later Tor release. It also
12372 includes fixes for some major issues affecting directory authorities,
12373 LibreSSL compatibility, and IPv6 correctness.
12375 The Tor 0.2.9.x release series is now marked as a long-term-support
12376 series. We intend to backport security fixes to 0.2.9.x until at
12377 least January of 2020.
12379 o Major bugfixes (directory authority, 0.3.0.3-alpha):
12380 - During voting, when marking a relay as a probable sybil, do not
12381 clear its BadExit flag: sybils can still be bad in other ways
12382 too. (We still clear the other flags.) Fixes bug 21108; bugfix
12385 o Major bugfixes (IPv6 Exits, backport from 0.3.0.3-alpha):
12386 - Stop rejecting all IPv6 traffic on Exits whose exit policy rejects
12387 any IPv6 addresses. Instead, only reject a port over IPv6 if the
12388 exit policy rejects that port on more than an IPv6 /16 of
12389 addresses. This bug was made worse by 17027 in 0.2.8.1-alpha,
12390 which rejected a relay's own IPv6 address by default. Fixes bug
12391 21357; bugfix on commit 004f3f4e53 in 0.2.4.7-alpha.
12393 o Major bugfixes (parsing, also in 0.3.0.4-rc):
12394 - Fix an integer underflow bug when comparing malformed Tor
12395 versions. This bug could crash Tor when built with
12396 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
12397 0.2.9.8, which were built with -ftrapv by default. In other cases
12398 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
12399 on 0.0.8pre1. Found by OSS-Fuzz.
12401 o Minor features (directory authorities, also in 0.3.0.4-rc):
12402 - Directory authorities now reject descriptors that claim to be
12403 malformed versions of Tor. Helps prevent exploitation of
12405 - Reject version numbers with components that exceed INT32_MAX.
12406 Otherwise 32-bit and 64-bit platforms would behave inconsistently.
12407 Fixes bug 21450; bugfix on 0.0.8pre1.
12409 o Minor features (geoip):
12410 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
12413 o Minor features (portability, compilation, backport from 0.3.0.3-alpha):
12414 - Autoconf now checks to determine if OpenSSL structures are opaque,
12415 instead of explicitly checking for OpenSSL version numbers. Part
12417 - Support building with recent LibreSSL code that uses opaque
12418 structures. Closes ticket 21359.
12420 o Minor bugfixes (code correctness, also in 0.3.0.4-rc):
12421 - Repair a couple of (unreachable or harmless) cases of the risky
12422 comparison-by-subtraction pattern that caused bug 21278.
12424 o Minor bugfixes (tor-resolve, backport from 0.3.0.3-alpha):
12425 - The tor-resolve command line tool now rejects hostnames over 255
12426 characters in length. Previously, it would silently truncate them,
12427 which could lead to bugs. Fixes bug 21280; bugfix on 0.0.9pre5.
12428 Patch by "junglefowl".
12431 Changes in version 0.3.0.3-alpha - 2017-02-03
12432 Tor 0.3.0.3-alpha fixes a few significant bugs introduced over the
12433 0.3.0.x development series, including some that could cause
12434 authorities to behave badly. There is also a fix for a longstanding
12435 bug that could prevent IPv6 exits from working. Tor 0.3.0.3-alpha also
12436 includes some smaller features and bugfixes.
12438 The Tor 0.3.0.x release series is now in patch-freeze: no additional
12439 features will be considered for inclusion in 0.3.0.x. We suspect that
12440 some bugs will probably remain, however, and we encourage people to
12443 o Major bugfixes (directory authority):
12444 - During voting, when marking a relay as a probable sybil, do not
12445 clear its BadExit flag: sybils can still be bad in other ways
12446 too. (We still clear the other flags.) Fixes bug 21108; bugfix
12448 - When deciding whether we have just found a router to be reachable,
12449 do not penalize it for not having performed an Ed25519 link
12450 handshake if it does not claim to support an Ed25519 handshake.
12451 Previously, we would treat such relays as non-running. Fixes bug
12452 21107; bugfix on 0.3.0.1-alpha.
12454 o Major bugfixes (entry guards):
12455 - Stop trying to build circuits through entry guards for which we
12456 have no descriptor. Also, stop crashing in the case that we *do*
12457 accidentally try to build a circuit in such a state. Fixes bug
12458 21242; bugfix on 0.3.0.1-alpha.
12460 o Major bugfixes (IPv6 Exits):
12461 - Stop rejecting all IPv6 traffic on Exits whose exit policy rejects
12462 any IPv6 addresses. Instead, only reject a port over IPv6 if the
12463 exit policy rejects that port on more than an IPv6 /16 of
12464 addresses. This bug was made worse by 17027 in 0.2.8.1-alpha,
12465 which rejected a relay's own IPv6 address by default. Fixes bug
12466 21357; bugfix on commit 004f3f4e53 in 0.2.4.7-alpha.
12468 o Minor feature (client):
12469 - Enable IPv6 traffic on the SocksPort by default. To disable this,
12470 a user will have to specify "NoIPv6Traffic". Closes ticket 21269.
12472 o Minor feature (fallback scripts):
12473 - Add a check_existing mode to updateFallbackDirs.py, which checks
12474 if fallbacks in the hard-coded list are working. Closes ticket
12475 20174. Patch by haxxpop.
12477 o Minor features (ciphersuite selection):
12478 - Clients now advertise a list of ciphersuites closer to the ones
12479 preferred by Firefox. Closes part of ticket 15426.
12480 - Allow relays to accept a wider range of ciphersuites, including
12481 chacha20-poly1305 and AES-CCM. Closes the other part of 15426.
12483 o Minor features (controller, configuration):
12484 - Each of the *Port options, such as SocksPort, ORPort, ControlPort,
12485 and so on, now comes with a __*Port variant that will not be saved
12486 to the torrc file by the controller's SAVECONF command. This
12487 change allows TorBrowser to set up a single-use domain socket for
12488 each time it launches Tor. Closes ticket 20956.
12489 - The GETCONF command can now query options that may only be
12490 meaningful in context-sensitive lists. This allows the controller
12491 to query the mixed SocksPort/__SocksPort style options introduced
12492 in feature 20956. Implements ticket 21300.
12494 o Minor features (portability, compilation):
12495 - Autoconf now checks to determine if OpenSSL structures are opaque,
12496 instead of explicitly checking for OpenSSL version numbers. Part
12498 - Support building with recent LibreSSL code that uses opaque
12499 structures. Closes ticket 21359.
12501 o Minor features (relay):
12502 - We now allow separation of exit and relay traffic to different
12503 source IP addresses, using the OutboundBindAddressExit and
12504 OutboundBindAddressOR options respectively. Closes ticket 17975.
12505 Written by Michael Sonntag.
12507 o Minor bugfix (logging):
12508 - Don't recommend the use of Tor2web in non-anonymous mode.
12509 Recommending Tor2web is a bad idea because the client loses all
12510 anonymity. Tor2web should only be used in specific cases by users
12511 who *know* and understand the issues. Fixes bug 21294; bugfix
12514 o Minor bugfixes (client):
12515 - Always recover from failures in extend_info_from_node(), in an
12516 attempt to prevent any recurrence of bug 21242. Fixes bug 21372;
12517 bugfix on 0.2.3.1-alpha.
12519 o Minor bugfixes (client, entry guards):
12520 - Fix a bug warning (with backtrace) when we fail a channel that
12521 circuits to fallback directories on it. Fixes bug 21128; bugfix
12523 - Fix a spurious bug warning (with backtrace) when removing an
12524 expired entry guard. Fixes bug 21129; bugfix on 0.3.0.1-alpha.
12525 - Fix a bug of the new guard algorithm where tor could stall for up
12526 to 10 minutes before retrying a guard after a long period of no
12527 network. Fixes bug 21052; bugfix on 0.3.0.1-alpha.
12528 - Do not try to build circuits until we have descriptors for our
12529 primary entry guards. Related to fix for bug 21242.
12531 o Minor bugfixes (configure, autoconf):
12532 - Rename the configure option --enable-expensive-hardening to
12533 --enable-fragile-hardening. Expensive hardening makes the tor
12534 daemon abort when some kinds of issues are detected. Thus, it
12535 makes tor more at risk of remote crashes but safer against RCE or
12536 heartbleed bug category. We now try to explain this issue in a
12537 message from the configure script. Fixes bug 21290; bugfix
12540 o Minor bugfixes (controller):
12541 - Restore the (deprecated) DROPGUARDS controller command. Fixes bug
12542 20824; bugfix on 0.3.0.1-alpha.
12544 o Minor bugfixes (hidden service):
12545 - Clean up the code for expiring intro points with no associated
12546 circuits. It was causing, rarely, a service with some expiring
12547 introduction points to not open enough additional introduction
12548 points. Fixes part of bug 21302; bugfix on 0.2.7.2-alpha.
12549 - Stop setting the torrc option HiddenServiceStatistics to "0" just
12550 because we're not a bridge or relay. Instead, we preserve whatever
12551 value the user set (or didn't set). Fixes bug 21150; bugfix
12553 - Resolve two possible underflows which could lead to creating and
12554 closing a lot of introduction point circuits in a non-stop loop.
12555 Fixes bug 21302; bugfix on 0.2.7.2-alpha.
12557 o Minor bugfixes (portability):
12558 - Use "OpenBSD" compiler macro instead of "OPENBSD" or "__OpenBSD__".
12559 It is supported by OpenBSD itself, and also by most OpenBSD
12560 variants (such as Bitrig). Fixes bug 20980; bugfix
12562 - When mapping a file of length greater than SIZE_MAX, do not
12563 silently truncate its contents. This issue could occur on 32 bit
12564 systems with large file support and files which are larger than 4
12565 GB. Fixes bug 21134; bugfix on 0.3.0.1-alpha.
12567 o Minor bugfixes (tor-resolve):
12568 - The tor-resolve command line tool now rejects hostnames over 255
12569 characters in length. Previously, it would silently truncate them,
12570 which could lead to bugs. Fixes bug 21280; bugfix on 0.0.9pre5.
12571 Patch by "junglefowl".
12573 o Minor bugfixes (Windows services):
12574 - Be sure to initialize the monotonic time subsystem before using
12575 it, even when running as an NT service. Fixes bug 21356; bugfix
12579 Changes in version 0.3.0.2-alpha - 2017-01-23
12580 Tor 0.3.0.2-alpha fixes a denial-of-service bug where an attacker could
12581 cause relays and clients to crash, even if they were not built with
12582 the --enable-expensive-hardening option. This bug affects all 0.2.9.x
12583 versions, and also affects 0.3.0.1-alpha: all relays running an affected
12584 version should upgrade.
12586 Tor 0.3.0.2-alpha also improves how exit relays and clients handle DNS
12587 time-to-live values, makes directory authorities enforce the 1-to-1
12588 mapping of relay RSA identity keys to ED25519 identity keys, fixes a
12589 client-side onion service reachability bug, does better at selecting
12590 the set of fallback directories, and more.
12592 o Major bugfixes (security, also in 0.2.9.9):
12593 - Downgrade the "-ftrapv" option from "always on" to "only on when
12594 --enable-expensive-hardening is provided." This hardening option, like
12595 others, can turn survivable bugs into crashes--and having it on by
12596 default made a (relatively harmless) integer overflow bug into a
12597 denial-of-service bug. Fixes bug 21278 (TROVE-2017-001); bugfix on
12600 o Major features (security):
12601 - Change the algorithm used to decide DNS TTLs on client and server
12602 side, to better resist DNS-based correlation attacks like the
12603 DefecTor attack of Greschbach, Pulls, Roberts, Winter, and
12604 Feamster. Now relays only return one of two possible DNS TTL
12605 values, and clients are willing to believe DNS TTL values up to 3
12606 hours long. Closes ticket 19769.
12608 o Major features (directory authority, security):
12609 - The default for AuthDirPinKeys is now 1: directory authorities
12610 will reject relays where the RSA identity key matches a previously
12611 seen value, but the Ed25519 key has changed. Closes ticket 18319.
12613 o Major bugfixes (client, guard, crash):
12614 - In circuit_get_global_origin_list(), return the actual list of
12615 origin circuits. The previous version of this code returned the
12616 list of all the circuits, and could have caused strange bugs,
12617 including possible crashes. Fixes bug 21118; bugfix
12620 o Major bugfixes (client, onion service, also in 0.2.9.9):
12621 - Fix a client-side onion service reachability bug, where multiple
12622 socks requests to an onion service (or a single slow request)
12623 could cause us to mistakenly mark some of the service's
12624 introduction points as failed, and we cache that failure so
12625 eventually we run out and can't reach the service. Also resolves a
12626 mysterious "Remote server sent bogus reason code 65021" log
12627 warning. The bug was introduced in ticket 17218, where we tried to
12628 remember the circuit end reason as a uint16_t, which mangled
12629 negative values. Partially fixes bug 21056 and fixes bug 20307;
12630 bugfix on 0.2.8.1-alpha.
12632 o Major bugfixes (DNS):
12633 - Fix a bug that prevented exit nodes from caching DNS records for
12634 more than 60 seconds. Fixes bug 19025; bugfix on 0.2.4.7-alpha.
12636 o Minor features (controller):
12637 - Add "GETINFO sr/current" and "GETINFO sr/previous" keys, to expose
12638 shared-random values to the controller. Closes ticket 19925.
12640 o Minor features (entry guards):
12641 - Add UseEntryGuards to TEST_OPTIONS_DEFAULT_VALUES in order to not
12642 break regression tests.
12643 - Require UseEntryGuards when UseBridges is set, in order to make
12644 sure bridges aren't bypassed. Resolves ticket 20502.
12646 o Minor features (fallback directories):
12647 - Select 200 fallback directories for each release. Closes
12649 - Allow 3 fallback relays per operator, which is safe now that we
12650 are choosing 200 fallback relays. Closes ticket 20912.
12651 - Exclude relays affected by bug 20499 from the fallback list.
12652 Exclude relays from the fallback list if they are running versions
12653 known to be affected by bug 20499, or if in our tests they deliver
12654 a stale consensus (i.e. one that expired more than 24 hours ago).
12655 Closes ticket 20539.
12656 - Reduce the minimum fallback bandwidth to 1 MByte/s. Part of
12658 - Require fallback directories to have the same address and port for
12659 7 days (now that we have enough relays with this stability).
12660 Relays whose OnionOO stability timer is reset on restart by bug
12661 18050 should upgrade to Tor 0.2.8.7 or later, which has a fix for
12662 this issue. Closes ticket 20880; maintains short-term fix
12664 - Require fallbacks to have flags for 90% of the time (weighted
12665 decaying average), rather than 95%. This allows at least 73% of
12666 clients to bootstrap in the first 5 seconds without contacting an
12667 authority. Part of ticket 18828.
12668 - Annotate updateFallbackDirs.py with the bandwidth and consensus
12669 weight for each candidate fallback. Closes ticket 20878.
12670 - Make it easier to change the output sort order of fallbacks.
12671 Closes ticket 20822.
12672 - Display the relay fingerprint when downloading consensuses from
12673 fallbacks. Closes ticket 20908.
12675 o Minor features (geoip, also in 0.2.9.9):
12676 - Update geoip and geoip6 to the January 4 2017 Maxmind GeoLite2
12679 o Minor features (next-gen onion service directories):
12680 - Remove the "EnableOnionServicesV3" consensus parameter that we
12681 introduced in 0.3.0.1-alpha: relays are now always willing to act
12682 as v3 onion service directories. Resolves ticket 19899.
12684 o Minor features (linting):
12685 - Enhance the changes file linter to warn on Tor versions that are
12686 prefixed with "tor-". Closes ticket 21096.
12688 o Minor features (logging):
12689 - In several places, describe unset ed25519 keys as "<unset>",
12690 rather than the scary "AAAAAAAA...AAA". Closes ticket 21037.
12692 o Minor bugfix (control protocol):
12693 - The reply to a "GETINFO config/names" request via the control
12694 protocol now spells the type "Dependent" correctly. This is a
12695 breaking change in the control protocol. (The field seems to be
12696 ignored by the most common known controllers.) Fixes bug 18146;
12697 bugfix on 0.1.1.4-alpha.
12699 o Minor bugfixes (bug resilience):
12700 - Fix an unreachable size_t overflow in base64_decode(). Fixes bug
12701 19222; bugfix on 0.2.0.9-alpha. Found by Guido Vranken; fixed by
12702 Hans Jerry Illikainen.
12704 o Minor bugfixes (build):
12705 - Replace obsolete Autoconf macros with their modern equivalent and
12706 prevent similar issues in the future. Fixes bug 20990; bugfix
12709 o Minor bugfixes (client, guards):
12710 - Fix bug where Tor would think that there are circuits waiting for
12711 better guards even though those circuits have been freed. Fixes
12712 bug 21142; bugfix on 0.3.0.1-alpha.
12714 o Minor bugfixes (config):
12715 - Don't assert on startup when trying to get the options list and
12716 LearnCircuitBuildTimeout is set to 0: we are currently parsing the
12717 options so of course they aren't ready yet. Fixes bug 21062;
12718 bugfix on 0.2.9.3-alpha.
12720 o Minor bugfixes (controller):
12721 - Make the GETINFO interface for inquiring about entry guards
12722 support the new guards backend. Fixes bug 20823; bugfix
12725 o Minor bugfixes (dead code):
12726 - Remove a redundant check for PidFile changes at runtime in
12727 options_transition_allowed(): this check is already performed
12728 regardless of whether the sandbox is active. Fixes bug 21123;
12729 bugfix on 0.2.5.4-alpha.
12731 o Minor bugfixes (documentation):
12732 - Update the tor manual page to document every option that can not
12733 be changed while tor is running. Fixes bug 21122.
12735 o Minor bugfixes (fallback directories):
12736 - Stop failing when a relay has no uptime data in
12737 updateFallbackDirs.py. Fixes bug 20945; bugfix on 0.2.8.1-alpha.
12738 - Avoid checking fallback candidates' DirPorts if they are down in
12739 OnionOO. When a relay operator has multiple relays, this
12740 prioritizes relays that are up over relays that are down. Fixes
12741 bug 20926; bugfix on 0.2.8.3-alpha.
12742 - Stop failing when OUTPUT_COMMENTS is True in updateFallbackDirs.py.
12743 Fixes bug 20877; bugfix on 0.2.8.3-alpha.
12745 o Minor bugfixes (guards, bootstrapping):
12746 - When connecting to a directory guard during bootstrap, do not mark
12747 the guard as successful until we receive a good-looking directory
12748 response from it. Fixes bug 20974; bugfix on 0.3.0.1-alpha.
12750 o Minor bugfixes (onion services):
12751 - Fix the config reload pruning of old vs new services so it
12752 actually works when both ephemeral and non-ephemeral services are
12753 configured. Fixes bug 21054; bugfix on 0.3.0.1-alpha.
12754 - Allow the number of introduction points to be as low as 0, rather
12755 than as low as 3. Fixes bug 21033; bugfix on 0.2.7.2-alpha.
12757 o Minor bugfixes (IPv6):
12758 - Make IPv6-using clients try harder to find an IPv6 directory
12759 server. Fixes bug 20999; bugfix on 0.2.8.2-alpha.
12760 - When IPv6 addresses have not been downloaded yet (microdesc
12761 consensus documents don't list relay IPv6 addresses), use hard-
12762 coded addresses for authorities, fallbacks, and configured
12763 bridges. Now IPv6-only clients can use microdescriptors. Fixes bug
12764 20996; bugfix on b167e82 from 19608 in 0.2.8.5-alpha.
12766 o Minor bugfixes (memory leaks):
12767 - Fix a memory leak when configuring hidden services. Fixes bug
12768 20987; bugfix on 0.3.0.1-alpha.
12770 o Minor bugfixes (portability, also in 0.2.9.9):
12771 - Avoid crashing when Tor is built using headers that contain
12772 CLOCK_MONOTONIC_COARSE, but then tries to run on an older kernel
12773 without CLOCK_MONOTONIC_COARSE. Fixes bug 21035; bugfix
12775 - Fix Libevent detection on platforms without Libevent 1 headers
12776 installed. Fixes bug 21051; bugfix on 0.2.9.1-alpha.
12778 o Minor bugfixes (relay):
12779 - Honor DataDirectoryGroupReadable when tor is a relay. Previously,
12780 initializing the keys would reset the DataDirectory to 0700
12781 instead of 0750 even if DataDirectoryGroupReadable was set to 1.
12782 Fixes bug 19953; bugfix on 0.0.2pre16. Patch by "redfish".
12784 o Minor bugfixes (testing):
12785 - Remove undefined behavior from the backtrace generator by removing
12786 its signal handler. Fixes bug 21026; bugfix on 0.2.5.2-alpha.
12788 o Minor bugfixes (unit tests):
12789 - Allow the unit tests to pass even when DNS lookups of bogus
12790 addresses do not fail as expected. Fixes bug 20862 and 20863;
12791 bugfix on unit tests introduced in 0.2.8.1-alpha
12792 through 0.2.9.4-alpha.
12794 o Code simplification and refactoring:
12795 - Refactor code to manipulate global_origin_circuit_list into
12796 separate functions. Closes ticket 20921.
12798 o Documentation (formatting):
12799 - Clean up formatting of tor.1 man page and HTML doc, where <pre>
12800 blocks were incorrectly appearing. Closes ticket 20885.
12802 o Documentation (man page):
12803 - Clarify many options in tor.1 and add some min/max values for
12804 HiddenService options. Closes ticket 21058.
12807 Changes in version 0.2.9.9 - 2017-01-23
12808 Tor 0.2.9.9 fixes a denial-of-service bug where an attacker could
12809 cause relays and clients to crash, even if they were not built with
12810 the --enable-expensive-hardening option. This bug affects all 0.2.9.x
12811 versions, and also affects 0.3.0.1-alpha: all relays running an affected
12812 version should upgrade.
12814 This release also resolves a client-side onion service reachability
12815 bug, and resolves a pair of small portability issues.
12817 o Major bugfixes (security):
12818 - Downgrade the "-ftrapv" option from "always on" to "only on when
12819 --enable-expensive-hardening is provided." This hardening option,
12820 like others, can turn survivable bugs into crashes -- and having
12821 it on by default made a (relatively harmless) integer overflow bug
12822 into a denial-of-service bug. Fixes bug 21278 (TROVE-2017-001);
12823 bugfix on 0.2.9.1-alpha.
12825 o Major bugfixes (client, onion service):
12826 - Fix a client-side onion service reachability bug, where multiple
12827 socks requests to an onion service (or a single slow request)
12828 could cause us to mistakenly mark some of the service's
12829 introduction points as failed, and we cache that failure so
12830 eventually we run out and can't reach the service. Also resolves a
12831 mysterious "Remote server sent bogus reason code 65021" log
12832 warning. The bug was introduced in ticket 17218, where we tried to
12833 remember the circuit end reason as a uint16_t, which mangled
12834 negative values. Partially fixes bug 21056 and fixes bug 20307;
12835 bugfix on 0.2.8.1-alpha.
12837 o Minor features (geoip):
12838 - Update geoip and geoip6 to the January 4 2017 Maxmind GeoLite2
12841 o Minor bugfixes (portability):
12842 - Avoid crashing when Tor is built using headers that contain
12843 CLOCK_MONOTONIC_COARSE, but then tries to run on an older kernel
12844 without CLOCK_MONOTONIC_COARSE. Fixes bug 21035; bugfix
12846 - Fix Libevent detection on platforms without Libevent 1 headers
12847 installed. Fixes bug 21051; bugfix on 0.2.9.1-alpha.
12850 Changes in version 0.3.0.1-alpha - 2016-12-19
12851 Tor 0.3.0.1-alpha is the first alpha release in the 0.3.0 development
12852 series. It strengthens Tor's link and circuit handshakes by
12853 identifying relays by their Ed25519 keys, improves the algorithm that
12854 clients use to choose and maintain their list of guards, and includes
12855 additional backend support for the next-generation hidden service
12856 design. It also contains numerous other small features and
12857 improvements to security, correctness, and performance.
12859 Below are the changes since 0.2.9.8.
12861 o Major features (guard selection algorithm):
12862 - Tor's guard selection algorithm has been redesigned from the
12863 ground up, to better support unreliable networks and restrictive
12864 sets of entry nodes, and to better resist guard-capture attacks by
12865 hostile local networks. Implements proposal 271; closes
12868 o Major features (next-generation hidden services):
12869 - Relays can now handle v3 ESTABLISH_INTRO cells as specified by
12870 prop224 aka "Next Generation Hidden Services". Service and clients
12871 don't use this functionality yet. Closes ticket 19043. Based on
12872 initial code by Alec Heifetz.
12873 - Relays now support the HSDir version 3 protocol, so that they can
12874 can store and serve v3 descriptors. This is part of the next-
12875 generation onion service work detailed in proposal 224. Closes
12878 o Major features (protocol, ed25519 identity keys):
12879 - Relays now use Ed25519 to prove their Ed25519 identities and to
12880 one another, and to clients. This algorithm is faster and more
12881 secure than the RSA-based handshake we've been doing until now.
12882 Implements the second big part of proposal 220; Closes
12884 - Clients now support including Ed25519 identity keys in the EXTEND2
12885 cells they generate. By default, this is controlled by a consensus
12886 parameter, currently disabled. You can turn this feature on for
12887 testing by setting ExtendByEd25519ID in your configuration. This
12888 might make your traffic appear different than the traffic
12889 generated by other users, however. Implements part of ticket
12890 15056; part of proposal 220.
12891 - Relays now understand requests to extend to other relays by their
12892 Ed25519 identity keys. When an Ed25519 identity key is included in
12893 an EXTEND2 cell, the relay will only extend the circuit if the
12894 other relay can prove ownership of that identity. Implements part
12895 of ticket 15056; part of proposal 220.
12897 o Major bugfixes (scheduler):
12898 - Actually compare circuit policies in ewma_cmp_cmux(). This bug
12899 caused the channel scheduler to behave more or less randomly,
12900 rather than preferring channels with higher-priority circuits.
12901 Fixes bug 20459; bugfix on 0.2.6.2-alpha.
12903 o Minor features (controller):
12904 - When HSFETCH arguments cannot be parsed, say "Invalid argument"
12905 rather than "unrecognized." Closes ticket 20389; patch from
12908 o Minor features (diagnostic, directory client):
12909 - Warn when we find an unexpected inconsistency in directory
12910 download status objects. Prevents some negative consequences of
12913 o Minor features (directory authority):
12914 - Add a new authority-only AuthDirTestEd25519LinkKeys option (on by
12915 default) to control whether authorities should try to probe relays
12916 by their Ed25519 link keys. This option will go away in a few
12917 releases--unless we encounter major trouble in our ed25519 link
12918 protocol rollout, in which case it will serve as a safety option.
12920 o Minor features (directory cache):
12921 - Relays and bridges will now refuse to serve the consensus they
12922 have if they know it is too old for a client to use. Closes
12925 o Minor features (ed25519 link handshake):
12926 - Advertise support for the ed25519 link handshake using the
12927 subprotocol-versions mechanism, so that clients can tell which
12928 relays can identity themselves by Ed25519 ID. Closes ticket 20552.
12930 o Minor features (fingerprinting resistance, authentication):
12931 - Extend the length of RSA keys used for TLS link authentication to
12932 2048 bits. (These weren't used for forward secrecy; for forward
12933 secrecy, we used P256.) Closes ticket 13752.
12935 o Minor features (infrastructure):
12936 - Implement smartlist_add_strdup() function. Replaces the use of
12937 smartlist_add(sl, tor_strdup(str)). Closes ticket 20048.
12939 o Minor bugfixes (client):
12940 - When clients that use bridges start up with a cached consensus on
12941 disk, they were ignoring it and downloading a new one. Now they
12942 use the cached one. Fixes bug 20269; bugfix on 0.2.3.12-alpha.
12944 o Minor bugfixes (configuration):
12945 - Accept non-space whitespace characters after the severity level in
12946 the `Log` option. Fixes bug 19965; bugfix on 0.2.1.1-alpha.
12947 - Support "TByte" and "TBytes" units in options given in bytes.
12948 "TB", "terabyte(s)", "TBit(s)" and "terabit(s)" were already
12949 supported. Fixes bug 20622; bugfix on 0.2.0.14-alpha.
12951 o Minor bugfixes (consensus weight):
12952 - Add new consensus method that initializes bw weights to 1 instead
12953 of 0. This prevents a zero weight from making it all the way to
12954 the end (happens in small testing networks) and causing an error.
12955 Fixes bug 14881; bugfix on 0.2.2.17-alpha.
12957 o Minor bugfixes (descriptors):
12958 - Correctly recognise downloaded full descriptors as valid, even
12959 when using microdescriptors as circuits. This affects clients with
12960 FetchUselessDescriptors set, and may affect directory authorities.
12961 Fixes bug 20839; bugfix on 0.2.3.2-alpha.
12963 o Minor bugfixes (directory system):
12964 - Download all consensus flavors, descriptors, and authority
12965 certificates when FetchUselessDescriptors is set, regardless of
12966 whether tor is a directory cache or not. Fixes bug 20667; bugfix
12967 on all recent tor versions.
12968 - Bridges and relays now use microdescriptors (like clients do)
12969 rather than old-style router descriptors. Now bridges will blend
12970 in with clients in terms of the circuits they build. Fixes bug
12971 6769; bugfix on 0.2.3.2-alpha.
12973 o Minor bugfixes (ed25519 certificates):
12974 - Correctly interpret ed25519 certificates that would expire some
12975 time after 19 Jan 2038. Fixes bug 20027; bugfix on 0.2.7.2-alpha.
12977 o Minor bugfixes (hidden services):
12978 - Stop ignoring misconfigured hidden services. Instead, refuse to
12979 start tor until the misconfigurations have been corrected. Fixes
12980 bug 20559; bugfix on multiple commits in 0.2.7.1-alpha
12983 o Minor bugfixes (memory leak at exit):
12984 - Fix a small harmless memory leak at exit of the previously unused
12985 RSA->Ed identity cross-certificate. Fixes bug 17779; bugfix
12988 o Minor bugfixes (util):
12989 - When finishing writing a file to disk, if we were about to replace
12990 the file with the temporary file created before and we fail to
12991 replace it, remove the temporary file so it doesn't stay on disk.
12992 Fixes bug 20646; bugfix on 0.2.0.7-alpha. Patch by fk.
12994 o Minor bugfixes (Windows):
12995 - Check for getpagesize before using it to mmap files. This fixes
12996 compilation in some MinGW environments. Fixes bug 20530; bugfix on
12997 0.1.2.1-alpha. Reported by "ice".
12999 o Code simplification and refactoring:
13000 - Abolish all global guard context in entrynodes.c; replace with new
13001 guard_selection_t structure as preparation for proposal 271.
13002 Closes ticket 19858.
13003 - Introduce rend_service_is_ephemeral() that tells if given onion
13004 service is ephemeral. Replace unclear NULL-checkings for service
13005 directory with this function. Closes ticket 20526.
13006 - Extract magic numbers in circuituse.c into defined variables.
13007 - Refactor circuit_is_available_for_use to remove unnecessary check.
13008 - Refactor circuit_predict_and_launch_new for readability and
13009 testability. Closes ticket 18873.
13010 - Refactor large if statement in purpose_needs_anonymity to use
13011 switch statement instead. Closes part of ticket 20077.
13012 - Refactor the hashing API to return negative values for errors, as
13013 is done as throughout the codebase. Closes ticket 20717.
13014 - Remove data structures that were used to index or_connection
13015 objects by their RSA identity digests. These structures are fully
13016 redundant with the similar structures used in the
13017 channel abstraction.
13018 - Remove duplicate code in the channel_write_*cell() functions.
13019 Closes ticket 13827; patch from Pingl.
13020 - Remove redundant behavior of is_sensitive_dir_purpose, refactor to
13021 use only purpose_needs_anonymity. Closes part of ticket 20077.
13022 - The code to generate and parse EXTEND and EXTEND2 cells has been
13023 replaced with code automatically generated by the
13027 - Include the "TBits" unit in Tor's man page. Fixes part of bug
13028 20622; bugfix on 0.2.5.1-alpha.
13029 - Change '1' to 'weight_scale' in consensus bw weights calculation
13030 comments, as that is reality. Closes ticket 20273. Patch
13032 - Correct the value for AuthDirGuardBWGuarantee in the manpage, from
13033 250 KBytes to 2 MBytes. Fixes bug 20435; bugfix
13035 - Stop the man page from incorrectly stating that HiddenServiceDir
13036 must already exist. Fixes 20486.
13037 - Clarify that when ClientRejectInternalAddresses is enabled (which
13038 is the default), multicast DNS hostnames for machines on the local
13039 network (of the form *.local) are also rejected. Closes
13042 o Removed features:
13043 - The AuthDirMaxServersPerAuthAddr option no longer exists: The same
13044 limit for relays running on a single IP applies to authority IP
13045 addresses as well as to non-authority IP addresses. Closes
13047 - The UseDirectoryGuards torrc option no longer exists: all users
13048 that use entry guards will also use directory guards. Related to
13049 proposal 271; implements part of ticket 20831.
13052 - New unit tests for tor_htonll(). Closes ticket 19563. Patch
13053 from "overcaffeinated".
13054 - Perform the coding style checks when running the tests and fail
13055 when coding style violations are found. Closes ticket 5500.
13056 - Add tests for networkstatus_compute_bw_weights_v10.
13057 - Add unit tests circuit_predict_and_launch_new.
13058 - Extract dummy_origin_circuit_new so it can be used by other
13062 Changes in version 0.2.8.12 - 2016-12-19
13063 Tor 0.2.8.12 backports a fix for a medium-severity issue (bug 21018
13064 below) where Tor clients could crash when attempting to visit a
13065 hostile hidden service. Clients are recommended to upgrade as packages
13066 become available for their systems.
13068 It also includes an updated list of fallback directories, backported
13071 Now that the Tor 0.2.9 series is stable, only major bugfixes will be
13072 backported to 0.2.8 in the future.
13074 o Major bugfixes (parsing, security, backported from 0.2.9.8):
13075 - Fix a bug in parsing that could cause clients to read a single
13076 byte past the end of an allocated region. This bug could be used
13077 to cause hardened clients (built with --enable-expensive-hardening)
13078 to crash if they tried to visit a hostile hidden service. Non-
13079 hardened clients are only affected depending on the details of
13080 their platform's memory allocator. Fixes bug 21018; bugfix on
13081 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
13082 2016-12-002 and as CVE-2016-1254.
13084 o Minor features (fallback directory list, backported from 0.2.9.8):
13085 - Replace the 81 remaining fallbacks of the 100 originally
13086 introduced in Tor 0.2.8.3-alpha in March 2016, with a list of 177
13087 fallbacks (123 new, 54 existing, 27 removed) generated in December
13088 2016. Resolves ticket 20170.
13090 o Minor features (geoip, backported from 0.2.9.7-rc):
13091 - Update geoip and geoip6 to the December 7 2016 Maxmind GeoLite2
13095 Changes in version 0.2.9.8 - 2016-12-19
13096 Tor 0.2.9.8 is the first stable release of the Tor 0.2.9 series.
13098 The Tor 0.2.9 series makes mandatory a number of security features
13099 that were formerly optional. It includes support for a new shared-
13100 randomness protocol that will form the basis for next generation
13101 hidden services, includes a single-hop hidden service mode for
13102 optimizing .onion services that don't actually want to be hidden,
13103 tries harder not to overload the directory authorities with excessive
13104 downloads, and supports a better protocol versioning scheme for
13105 improved compatibility with other implementations of the Tor protocol.
13107 And of course, there are numerous other bugfixes and improvements.
13109 This release also includes a fix for a medium-severity issue (bug
13110 21018 below) where Tor clients could crash when attempting to visit a
13111 hostile hidden service. Clients are recommended to upgrade as packages
13112 become available for their systems.
13114 Below are the changes since 0.2.9.7-rc. For a list of all changes
13115 since 0.2.8, see the ReleaseNotes file.
13117 o Major bugfixes (parsing, security):
13118 - Fix a bug in parsing that could cause clients to read a single
13119 byte past the end of an allocated region. This bug could be used
13120 to cause hardened clients (built with --enable-expensive-hardening)
13121 to crash if they tried to visit a hostile hidden service. Non-
13122 hardened clients are only affected depending on the details of
13123 their platform's memory allocator. Fixes bug 21018; bugfix on
13124 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
13125 2016-12-002 and as CVE-2016-1254.
13127 o Minor features (fallback directory list):
13128 - Replace the 81 remaining fallbacks of the 100 originally
13129 introduced in Tor 0.2.8.3-alpha in March 2016, with a list of 177
13130 fallbacks (123 new, 54 existing, 27 removed) generated in December
13131 2016. Resolves ticket 20170.
13134 Changes in version 0.2.9.7-rc - 2016-12-12
13135 Tor 0.2.9.7-rc fixes a few small bugs remaining in Tor 0.2.9.6-rc,
13136 including a few that had prevented tests from passing on
13139 o Minor features (geoip):
13140 - Update geoip and geoip6 to the December 7 2016 Maxmind GeoLite2
13143 o Minor bugfix (build):
13144 - The current Git revision when building from a local repository is
13145 now detected correctly when using git worktrees. Fixes bug 20492;
13146 bugfix on 0.2.3.9-alpha.
13148 o Minor bugfixes (directory authority):
13149 - When computing old Tor protocol line version in protover, we were
13150 looking at 0.2.7.5 twice instead of a specific case for
13151 0.2.9.1-alpha. Fixes bug 20810; bugfix on 0.2.9.4-alpha.
13153 o Minor bugfixes (download scheduling):
13154 - Resolve a "bug" warning when considering a download schedule whose
13155 delay had approached INT_MAX. Fixes 20875; bugfix on 0.2.9.5-alpha.
13157 o Minor bugfixes (logging):
13158 - Downgrade a harmless log message about the
13159 pending_entry_connections list from "warn" to "info". Mitigates
13162 o Minor bugfixes (memory leak):
13163 - Fix a small memory leak when receiving AF_UNIX connections on a
13164 SocksPort. Fixes bug 20716; bugfix on 0.2.6.3-alpha.
13165 - When moving a signed descriptor object from a source to an
13166 existing destination, free the allocated memory inside that
13167 destination object. Fixes bug 20715; bugfix on 0.2.8.3-alpha.
13169 o Minor bugfixes (memory leak, use-after-free, linux seccomp2 sandbox):
13170 - Fix a memory leak and use-after-free error when removing entries
13171 from the sandbox's getaddrinfo() cache. Fixes bug 20710; bugfix on
13172 0.2.5.5-alpha. Patch from "cypherpunks".
13174 o Minor bugfixes (portability):
13175 - Use the correct spelling of MAC_OS_X_VERSION_10_12 on configure.ac
13176 Fixes bug 20935; bugfix on 0.2.9.6-rc.
13178 o Minor bugfixes (unit tests):
13179 - Stop expecting NetBSD unit tests to report success for ipfw. Part
13180 of a fix for bug 19960; bugfix on 0.2.9.5-alpha.
13181 - Fix tolerances in unit tests for monotonic time comparisons
13182 between nanoseconds and microseconds. Previously, we accepted a 10
13183 us difference only, which is not realistic on every platform's
13184 clock_gettime(). Fixes bug 19974; bugfix on 0.2.9.1-alpha.
13185 - Remove a double-free in the single onion service unit test. Stop
13186 ignoring a return value. Make future changes less error-prone.
13187 Fixes bug 20864; bugfix on 0.2.9.6-rc.
13190 Changes in version 0.2.8.11 - 2016-12-08
13191 Tor 0.2.8.11 backports fixes for additional portability issues that
13192 could prevent Tor from building correctly on OSX Sierra, or with
13193 OpenSSL 1.1. Affected users should upgrade; others can safely stay
13196 o Minor bugfixes (portability):
13197 - Avoid compilation errors when building on OSX Sierra. Sierra began
13198 to support the getentropy() and clock_gettime() APIs, but created
13199 a few problems in doing so. Tor 0.2.9 has a more thorough set of
13200 workarounds; in 0.2.8, we are just using the /dev/urandom and mach
13201 monotonic time interfaces. Fixes bug 20865. Bugfix
13204 o Minor bugfixes (portability, backport from 0.2.9.5-alpha):
13205 - Fix compilation with OpenSSL 1.1 and less commonly-used CPU
13206 architectures. Closes ticket 20588.
13209 Changes in version 0.2.8.10 - 2016-12-02
13210 Tor 0.2.8.10 backports a fix for a bug that would sometimes make clients
13211 unusable after they left standby mode. It also backports fixes for
13212 a few portability issues and a small but problematic memory leak.
13214 o Major bugfixes (client reliability, backport from 0.2.9.5-alpha):
13215 - When Tor leaves standby because of a new application request, open
13216 circuits as needed to serve that request. Previously, we would
13217 potentially wait a very long time. Fixes part of bug 19969; bugfix
13220 o Major bugfixes (client performance, backport from 0.2.9.5-alpha):
13221 - Clients now respond to new application stream requests immediately
13222 when they arrive, rather than waiting up to one second before
13223 starting to handle them. Fixes part of bug 19969; bugfix
13226 o Minor bugfixes (portability, backport from 0.2.9.6-rc):
13227 - Work around a bug in the OSX 10.12 SDK that would prevent us from
13228 successfully targeting earlier versions of OSX. Resolves
13231 o Minor bugfixes (portability, backport from 0.2.9.5-alpha):
13232 - Fix implicit conversion warnings under OpenSSL 1.1. Fixes bug
13233 20551; bugfix on 0.2.1.1-alpha.
13235 o Minor bugfixes (relay, backport from 0.2.9.5-alpha):
13236 - Work around a memory leak in OpenSSL 1.1 when encoding public
13237 keys. Fixes bug 20553; bugfix on 0.0.2pre8.
13239 o Minor features (geoip):
13240 - Update geoip and geoip6 to the November 3 2016 Maxmind GeoLite2
13243 Changes in version 0.2.9.6-rc - 2016-12-02
13244 Tor 0.2.9.6-rc fixes a few remaining bugs found in the previous alpha
13245 version. We hope that it will be ready to become stable soon, and we
13246 encourage everyone to test this release. If no showstopper bugs are
13247 found here, the next 0.2.9 release will be stable.
13249 o Major bugfixes (relay, resolver, logging):
13250 - For relays that don't know their own address, avoid attempting a
13251 local hostname resolve for each descriptor we download. This
13252 will cut down on the number of "Success: chose address 'x.x.x.x'"
13253 log lines, and also avoid confusing clock jumps if the resolver
13254 is slow. Fixes bugs 20423 and 20610; bugfix on 0.2.8.1-alpha.
13256 o Minor bugfixes (client, fascistfirewall):
13257 - Avoid spurious warnings when ReachableAddresses or FascistFirewall
13258 is set. Fixes bug 20306; bugfix on 0.2.8.2-alpha.
13260 o Minor bugfixes (hidden services):
13261 - Stop ignoring the anonymity status of saved keys for hidden
13262 services and single onion services when first starting tor.
13263 Instead, refuse to start tor if any hidden service key has been
13264 used in a different hidden service anonymity mode. Fixes bug
13265 20638; bugfix on 17178 in 0.2.9.3-alpha; reported by ahf.
13267 o Minor bugfixes (portability):
13268 - Work around a bug in the OSX 10.12 SDK that would prevent us from
13269 successfully targeting earlier versions of OSX. Resolves
13271 - Run correctly when built on Windows build environments that
13272 require _vcsprintf(). Fixes bug 20560; bugfix on 0.2.2.11-alpha.
13274 o Minor bugfixes (single onion services, Tor2web):
13275 - Stop complaining about long-term one-hop circuits deliberately
13276 created by single onion services and Tor2web. These log messages
13277 are intended to diagnose issue 8387, which relates to circuits
13278 hanging around forever for no reason. Fixes bug 20613; bugfix on
13279 0.2.9.1-alpha. Reported by "pastly".
13281 o Minor bugfixes (unit tests):
13282 - Stop spurious failures in the local interface address discovery
13283 unit tests. Fixes bug 20634; bugfix on 0.2.8.1-alpha; patch by
13287 - Correct the minimum bandwidth value in torrc.sample, and queue a
13288 corresponding change for torrc.minimal. Closes ticket 20085.
13291 Changes in version 0.2.9.5-alpha - 2016-11-08
13292 Tor 0.2.9.5-alpha fixes numerous bugs discovered in the previous alpha
13293 version. We believe one or two probably remain, and we encourage
13294 everyone to test this release.
13296 o Major bugfixes (client performance):
13297 - Clients now respond to new application stream requests immediately
13298 when they arrive, rather than waiting up to one second before
13299 starting to handle them. Fixes part of bug 19969; bugfix
13302 o Major bugfixes (client reliability):
13303 - When Tor leaves standby because of a new application request, open
13304 circuits as needed to serve that request. Previously, we would
13305 potentially wait a very long time. Fixes part of bug 19969; bugfix
13308 o Major bugfixes (download scheduling):
13309 - When using an exponential backoff schedule, do not give up on
13310 downloading just because we have failed a bunch of times. Since
13311 each delay is longer than the last, retrying indefinitely won't
13312 hurt. Fixes bug 20536; bugfix on 0.2.9.1-alpha.
13313 - If a consensus expires while we are waiting for certificates to
13314 download, stop waiting for certificates.
13315 - If we stop waiting for certificates less than a minute after we
13316 started downloading them, do not consider the certificate download
13317 failure a separate failure. Fixes bug 20533; bugfix
13319 - Remove the maximum delay on exponential-backoff scheduling. Since
13320 we now allow an infinite number of failures (see ticket 20536), we
13321 must now allow the time to grow longer on each failure. Fixes part
13322 of bug 20534; bugfix on 0.2.9.1-alpha.
13323 - Make our initial download delays closer to those from 0.2.8. Fixes
13324 another part of bug 20534; bugfix on 0.2.9.1-alpha.
13325 - When determining when to download a directory object, handle times
13326 after 2038 if the operating system supports them. (Someday this
13327 will be important!) Fixes bug 20587; bugfix on 0.2.8.1-alpha.
13328 - When using exponential backoff in test networks, use a lower
13329 exponent, so the delays do not vary as much. This helps test
13330 networks bootstrap consistently. Fixes bug 20597; bugfix on 20499.
13332 o Minor features (geoip):
13333 - Update geoip and geoip6 to the November 3 2016 Maxmind GeoLite2
13336 o Minor bugfixes (client directory scheduling):
13337 - Treat "relay too busy to answer request" as a failed request and a
13338 reason to back off on our retry frequency. This is safe now that
13339 exponential backoffs retry indefinitely, and avoids a bug where we
13340 would reset our download schedule erroneously. Fixes bug 20593;
13341 bugfix on 0.2.9.1-alpha.
13343 o Minor bugfixes (client, logging):
13344 - Remove a BUG warning in circuit_pick_extend_handshake(). Instead,
13345 assume all nodes support EXTEND2. Use ntor whenever a key is
13346 available. Fixes bug 20472; bugfix on 0.2.9.3-alpha.
13347 - On DNSPort, stop logging a BUG warning on a failed hostname
13348 lookup. Fixes bug 19869; bugfix on 0.2.9.1-alpha.
13350 o Minor bugfixes (hidden services):
13351 - When configuring hidden services, check every hidden service
13352 directory's permissions. Previously, we only checked the last
13353 hidden service. Fixes bug 20529; bugfix the work to fix 13942
13356 o Minor bugfixes (portability):
13357 - Fix compilation with OpenSSL 1.1 and less commonly-used CPU
13358 architectures. Closes ticket 20588.
13359 - Use ECDHE ciphers instead of ECDH in tortls tests. LibreSSL has
13360 removed the ECDH ciphers which caused the tests to fail on
13361 platforms which use it. Fixes bug 20460; bugfix on 0.2.8.1-alpha.
13362 - Fix implicit conversion warnings under OpenSSL 1.1. Fixes bug
13363 20551; bugfix on 0.2.1.1-alpha.
13365 o Minor bugfixes (relay bootstrap):
13366 - Ensure relays don't make multiple connections during bootstrap.
13367 Fixes bug 20591; bugfix on 0.2.8.1-alpha.
13369 o Minor bugfixes (relay):
13370 - Work around a memory leak in OpenSSL 1.1 when encoding public
13371 keys. Fixes bug 20553; bugfix on 0.0.2pre8.
13372 - Avoid a small memory leak when informing worker threads about
13373 rotated onion keys. Fixes bug 20401; bugfix on 0.2.6.3-alpha.
13374 - Do not try to parallelize workers more than 16x without the user
13375 explicitly configuring us to do so, even if we do detect more than
13376 16 CPU cores. Fixes bug 19968; bugfix on 0.2.3.1-alpha.
13378 o Minor bugfixes (single onion services):
13379 - Start correctly when creating a single onion service in a
13380 directory that did not previously exist. Fixes bug 20484; bugfix
13383 o Minor bugfixes (testing):
13384 - Avoid a unit test failure on systems with over 16 detectable CPU
13385 cores. Fixes bug 19968; bugfix on 0.2.3.1-alpha.
13388 - Clarify that setting HiddenServiceNonAnonymousMode requires you to
13389 also set "SOCKSPort 0". Fixes bug 20487; bugfix on 0.2.9.3-alpha.
13390 - Module-level documentation for several more modules. Closes
13391 tickets 19287 and 19290.
13394 Changes in version 0.2.8.9 - 2016-10-17
13395 Tor 0.2.8.9 backports a fix for a security hole in previous versions
13396 of Tor that would allow a remote attacker to crash a Tor client,
13397 hidden service, relay, or authority. All Tor users should upgrade to
13398 this version, or to 0.2.9.4-alpha. Patches will be released for older
13401 o Major features (security fixes, also in 0.2.9.4-alpha):
13402 - Prevent a class of security bugs caused by treating the contents
13403 of a buffer chunk as if they were a NUL-terminated string. At
13404 least one such bug seems to be present in all currently used
13405 versions of Tor, and would allow an attacker to remotely crash
13406 most Tor instances, especially those compiled with extra compiler
13407 hardening. With this defense in place, such bugs can't crash Tor,
13408 though we should still fix them as they occur. Closes ticket
13409 20384 (TROVE-2016-10-001).
13411 o Minor features (geoip):
13412 - Update geoip and geoip6 to the October 4 2016 Maxmind GeoLite2
13416 Changes in version 0.2.9.4-alpha - 2016-10-17
13417 Tor 0.2.9.4-alpha fixes a security hole in previous versions of Tor
13418 that would allow a remote attacker to crash a Tor client, hidden
13419 service, relay, or authority. All Tor users should upgrade to this
13420 version, or to 0.2.8.9. Patches will be released for older versions
13423 Tor 0.2.9.4-alpha also adds numerous small features and fix-ups to
13424 previous versions of Tor, including the implementation of a feature to
13425 future- proof the Tor ecosystem against protocol changes, some bug
13426 fixes necessary for Tor Browser to use unix domain sockets correctly,
13427 and several portability improvements. We anticipate that this will be
13428 the last alpha in the Tor 0.2.9 series, and that the next release will
13429 be a release candidate.
13431 o Major features (security fixes):
13432 - Prevent a class of security bugs caused by treating the contents
13433 of a buffer chunk as if they were a NUL-terminated string. At
13434 least one such bug seems to be present in all currently used
13435 versions of Tor, and would allow an attacker to remotely crash
13436 most Tor instances, especially those compiled with extra compiler
13437 hardening. With this defense in place, such bugs can't crash Tor,
13438 though we should still fix them as they occur. Closes ticket
13439 20384 (TROVE-2016-10-001).
13441 o Major features (subprotocol versions):
13442 - Tor directory authorities now vote on a set of recommended
13443 subprotocol versions, and on a set of required subprotocol
13444 versions. Clients and relays that lack support for a _required_
13445 subprotocol version will not start; those that lack support for a
13446 _recommended_ subprotocol version will warn the user to upgrade.
13447 Closes ticket 19958; implements part of proposal 264.
13448 - Tor now uses "subprotocol versions" to indicate compatibility.
13449 Previously, versions of Tor looked at the declared Tor version of
13450 a relay to tell whether they could use a given feature. Now, they
13451 should be able to rely on its declared subprotocol versions. This
13452 change allows compatible implementations of the Tor protocol(s) to
13453 exist without pretending to be 100% bug-compatible with particular
13454 releases of Tor itself. Closes ticket 19958; implements part of
13457 o Minor feature (fallback directories):
13458 - Remove broken fallbacks from the hard-coded fallback directory
13459 list. Closes ticket 20190; patch by teor.
13461 o Minor features (client, directory):
13462 - Since authorities now omit all routers that lack the Running and
13463 Valid flags, we assume that any relay listed in the consensus must
13464 have those flags. Closes ticket 20001; implements part of
13467 o Minor features (compilation, portability):
13468 - Compile correctly on MacOS 10.12 (aka "Sierra"). Closes
13471 o Minor features (development tools, etags):
13472 - Teach the "make tags" Makefile target how to correctly find
13473 "MOCK_IMPL" function definitions. Patch from nherring; closes
13476 o Minor features (geoip):
13477 - Update geoip and geoip6 to the October 4 2016 Maxmind GeoLite2
13480 o Minor features (unix domain sockets):
13481 - When configuring a unix domain socket for a SocksPort,
13482 ControlPort, or Hidden service, you can now wrap the address in
13483 quotes, using C-style escapes inside the quotes. This allows unix
13484 domain socket paths to contain spaces.
13486 o Minor features (virtual addresses):
13487 - Increase the maximum number of bits for the IPv6 virtual network
13488 prefix from 16 to 104. In this way, the condition for address
13489 allocation is less restrictive. Closes ticket 20151; feature
13492 o Minor bugfixes (address discovery):
13493 - Stop reordering IP addresses returned by the OS. This makes it
13494 more likely that Tor will guess the same relay IP address every
13495 time. Fixes issue 20163; bugfix on 0.2.7.1-alpha, ticket 17027.
13496 Reported by René Mayrhofer, patch by "cypherpunks".
13498 o Minor bugfixes (client, unix domain sockets):
13499 - Disable IsolateClientAddr when using AF_UNIX backed SocksPorts as
13500 the client address is meaningless. Fixes bug 20261; bugfix
13503 o Minor bugfixes (compilation, OpenBSD):
13504 - Detect Libevent2 functions correctly on systems that provide
13505 libevent2, but where libevent1 is linked with -levent. Fixes bug
13506 19904; bugfix on 0.2.2.24-alpha. Patch from Rubiate.
13508 o Minor bugfixes (configuration):
13509 - When parsing quoted configuration values from the torrc file,
13510 handle windows line endings correctly. Fixes bug 19167; bugfix on
13511 0.2.0.16-alpha. Patch from "Pingl".
13513 o Minor bugfixes (getpass):
13514 - Defensively fix a non-triggerable heap corruption at do_getpass()
13515 to protect ourselves from mistakes in the future. Fixes bug
13516 19223; bugfix on 0.2.7.3-rc. Bug found by Guido Vranken, patch
13519 o Minor bugfixes (hidden service):
13520 - Allow hidden services to run on IPv6 addresses even when the
13521 IPv6Exit option is not set. Fixes bug 18357; bugfix
13525 - Add module-level internal documentation for 36 C files that
13526 previously didn't have a high-level overview. Closes ticket #20385.
13528 o Required libraries:
13529 - When building with OpenSSL, Tor now requires version 1.0.1 or
13530 later. OpenSSL 1.0.0 and earlier are no longer supported by the
13531 OpenSSL team, and should not be used. Closes ticket 20303.
13534 Changes in version 0.2.9.3-alpha - 2016-09-23
13535 Tor 0.2.9.3-alpha adds improved support for entities that want to make
13536 high-performance services available through the Tor .onion mechanism
13537 without themselves receiving anonymity as they host those services. It
13538 also tries harder to ensure that all steps on a circuit are using the
13539 strongest crypto possible, strengthens some TLS properties, and
13540 resolves several bugs -- including a pair of crash bugs from the 0.2.8
13541 series. Anybody running an earlier version of 0.2.9.x should upgrade.
13543 o Major bugfixes (crash, also in 0.2.8.8):
13544 - Fix a complicated crash bug that could affect Tor clients
13545 configured to use bridges when replacing a networkstatus consensus
13546 in which one of their bridges was mentioned. OpenBSD users saw
13547 more crashes here, but all platforms were potentially affected.
13548 Fixes bug 20103; bugfix on 0.2.8.2-alpha.
13550 o Major bugfixes (relay, OOM handler, also in 0.2.8.8):
13551 - Fix a timing-dependent assertion failure that could occur when we
13552 tried to flush from a circuit after having freed its cells because
13553 of an out-of-memory condition. Fixes bug 20203; bugfix on
13554 0.2.8.1-alpha. Thanks to "cypherpunks" for help diagnosing
13557 o Major features (circuit building, security):
13558 - Authorities, relays and clients now require ntor keys in all
13559 descriptors, for all hops (except for rare hidden service protocol
13560 cases), for all circuits, and for all other roles. Part of
13562 - Tor authorities, relays, and clients only use ntor, except for
13563 rare cases in the hidden service protocol. Part of ticket 19163.
13565 o Major features (single-hop "hidden" services):
13566 - Add experimental HiddenServiceSingleHopMode and
13567 HiddenServiceNonAnonymousMode options. When both are set to 1,
13568 every hidden service on a Tor instance becomes a non-anonymous
13569 Single Onion Service. Single Onions make one-hop (direct)
13570 connections to their introduction and rendezvous points. One-hop
13571 circuits make Single Onion servers easily locatable, but clients
13572 remain location-anonymous. This is compatible with the existing
13573 hidden service implementation, and works on the current tor
13574 network without any changes to older relays or clients. Implements
13575 proposal 260, completes ticket 17178. Patch by teor and asn.
13577 o Major features (resource management):
13578 - Tor can now notice it is about to run out of sockets, and
13579 preemptively close connections of lower priority. (This feature is
13580 off by default for now, since the current prioritizing method is
13581 yet not mature enough. You can enable it by setting
13582 "DisableOOSCheck 0", but watch out: it might close some sockets
13583 you would rather have it keep.) Closes ticket 18640.
13585 o Major bugfixes (circuit building):
13586 - Hidden service client-to-intro-point and service-to-rendezvous-
13587 point circuits use the TAP key supplied by the protocol, to avoid
13588 epistemic attacks. Fixes bug 19163; bugfix on 0.2.4.18-rc.
13590 o Major bugfixes (compilation, OpenBSD):
13591 - Fix a Libevent-detection bug in our autoconf script that would
13592 prevent Tor from linking successfully on OpenBSD. Patch from
13593 rubiate. Fixes bug 19902; bugfix on 0.2.9.1-alpha.
13595 o Major bugfixes (hidden services):
13596 - Clients now require hidden services to include the TAP keys for
13597 their intro points in the hidden service descriptor. This prevents
13598 an inadvertent upgrade to ntor, which a malicious hidden service
13599 could use to distinguish clients by consensus version. Fixes bug
13600 20012; bugfix on 0.2.4.8-alpha. Patch by teor.
13602 o Minor features (security, TLS):
13603 - Servers no longer support clients that without AES ciphersuites.
13604 (3DES is no longer considered an acceptable cipher.) We believe
13605 that no such Tor clients currently exist, since Tor has required
13606 OpenSSL 0.9.7 or later since 2009. Closes ticket 19998.
13608 o Minor feature (fallback directories):
13609 - Remove 8 fallbacks that are no longer suitable, leaving 81 of the
13610 100 fallbacks originally introduced in Tor 0.2.8.2-alpha in March
13611 2016. Closes ticket 20190; patch by teor.
13613 o Minor features (geoip, also in 0.2.8.8):
13614 - Update geoip and geoip6 to the September 6 2016 Maxmind GeoLite2
13617 o Minor feature (port flags):
13618 - Add new flags to the *Port options to finer control over which
13619 requests are allowed. The flags are NoDNSRequest, NoOnionTraffic,
13620 and the synthetic flag OnionTrafficOnly, which is equivalent to
13621 NoDNSRequest, NoIPv4Traffic, and NoIPv6Traffic. Closes enhancement
13622 18693; patch by "teor".
13624 o Minor features (directory authority):
13625 - After voting, if the authorities decide that a relay is not
13626 "Valid", they no longer include it in the consensus at all. Closes
13627 ticket 20002; implements part of proposal 272.
13629 o Minor features (testing):
13630 - Disable memory protections on OpenBSD when performing our unit
13631 tests for memwipe(). The test deliberately invokes undefined
13632 behavior, and the OpenBSD protections interfere with this. Patch
13633 from "rubiate". Closes ticket 20066.
13635 o Minor features (testing, ipv6):
13636 - Add the single-onion and single-onion-ipv6 chutney targets to
13637 "make test-network-all". This requires a recent chutney version
13638 with the single onion network flavours (git c72a652 or later).
13639 Closes ticket 20072; patch by teor.
13640 - Add the hs-ipv6 chutney target to make test-network-all's IPv6
13641 tests. Remove bridges+hs, as it's somewhat redundant. This
13642 requires a recent chutney version that supports IPv6 clients,
13643 relays, and authorities. Closes ticket 20069; patch by teor.
13645 o Minor features (Tor2web):
13646 - Make Tor2web clients respect ReachableAddresses. This feature was
13647 inadvertently enabled in 0.2.8.6, then removed by bugfix 19973 on
13648 0.2.8.7. Implements feature 20034. Patch by teor.
13650 o Minor features (unit tests):
13651 - We've done significant work to make the unit tests run faster.
13652 - Our link-handshake unit tests now check that when invalid
13653 handshakes fail, they fail with the error messages we expected.
13654 - Our unit testing code that captures log messages no longer
13655 prevents them from being written out if the user asked for them
13656 (by passing --debug or --info or or --notice --warn to the "test"
13657 binary). This change prevents us from missing unexpected log
13658 messages simply because we were looking for others. Related to
13660 - The unit tests now log all warning messages with the "BUG" flag.
13661 Previously, they only logged errors by default. This change will
13662 help us make our testing code more correct, and make sure that we
13663 only hit this code when we mean to. In the meantime, however,
13664 there will be more warnings in the unit test logs than before.
13665 This is preparatory work for ticket 19999.
13666 - The unit tests now treat any failure of a "tor_assert_nonfatal()"
13667 assertion as a test failure.
13669 o Minor bug fixes (circuits):
13670 - Use the CircuitBuildTimeout option whenever
13671 LearnCircuitBuildTimeout is disabled. Previously, we would respect
13672 the option when a user disabled it, but not when it was disabled
13673 because some other option was set. Fixes bug 20073; bugfix on
13674 0.2.4.12-alpha. Patch by teor.
13676 o Minor bugfixes (allocation):
13677 - Change how we allocate memory for large chunks on buffers, to
13678 avoid a (currently impossible) integer overflow, and to waste less
13679 space when allocating unusually large chunks. Fixes bug 20081;
13680 bugfix on 0.2.0.16-alpha. Issue identified by Guido Vranken.
13681 - Always include orconfig.h before including any other C headers.
13682 Sometimes, it includes macros that affect the behavior of the
13683 standard headers. Fixes bug 19767; bugfix on 0.2.9.1-alpha (the
13684 first version to use AC_USE_SYSTEM_EXTENSIONS).
13685 - Fix a syntax error in the IF_BUG_ONCE__() macro in non-GCC-
13686 compatible compilers. Fixes bug 20141; bugfix on 0.2.9.1-alpha.
13687 Patch from Gisle Vanem.
13688 - Stop trying to build with Clang 4.0's -Wthread-safety warnings.
13689 They apparently require a set of annotations that we aren't
13690 currently using, and they create false positives in our pthreads
13691 wrappers. Fixes bug 20110; bugfix on 0.2.9.1-alpha.
13693 o Minor bugfixes (directory authority):
13694 - Die with a more useful error when the operator forgets to place
13695 the authority_signing_key file into the keys directory. This
13696 avoids an uninformative assert & traceback about having an invalid
13697 key. Fixes bug 20065; bugfix on 0.2.0.1-alpha.
13698 - When allowing private addresses, mark Exits that only exit to
13699 private locations as such. Fixes bug 20064; bugfix
13702 o Minor bugfixes (documentation):
13703 - Document the default PathsNeededToBuildCircuits value that's used
13704 by clients when the directory authorities don't set
13705 min_paths_for_circs_pct. Fixes bug 20117; bugfix on 02c320916e02
13706 in 0.2.4.10-alpha. Patch by teor, reported by Jesse V.
13707 - Fix manual for the User option: it takes a username, not a UID.
13708 Fixes bug 19122; bugfix on 0.0.2pre16 (the first version to have
13711 o Minor bugfixes (hidden services):
13712 - Stop logging intro point details to the client log on certain
13713 error conditions. Fixed as part of bug 20012; bugfix on
13714 0.2.4.8-alpha. Patch by teor.
13716 o Minor bugfixes (IPv6, testing):
13717 - Check for IPv6 correctly on Linux when running test networks.
13718 Fixes bug 19905; bugfix on 0.2.7.3-rc; patch by teor.
13720 o Minor bugfixes (Linux seccomp2 sandbox):
13721 - Add permission to run the sched_yield() and sigaltstack() system
13722 calls, in order to support versions of Tor compiled with asan or
13723 ubsan code that use these calls. Now "sandbox 1" and
13724 "--enable-expensive-hardening" should be compatible on more
13725 systems. Fixes bug 20063; bugfix on 0.2.5.1-alpha.
13727 o Minor bugfixes (logging):
13728 - When logging a message from the BUG() macro, be explicit about
13729 what we were asserting. Previously we were confusing what we were
13730 asserting with what the bug was. Fixes bug 20093; bugfix
13732 - When we are unable to remove the bw_accounting file, do not warn
13733 if the reason we couldn't remove it was that it didn't exist.
13734 Fixes bug 19964; bugfix on 0.2.5.4-alpha. Patch from 'pastly'.
13736 o Minor bugfixes (option parsing):
13737 - Count unix sockets when counting client listeners (SOCKS, Trans,
13738 NATD, and DNS). This has no user-visible behaviour changes: these
13739 options are set once, and never read. Required for correct
13740 behaviour in ticket 17178. Fixes bug 19677; bugfix on
13741 0.2.6.3-alpha. Patch by teor.
13743 o Minor bugfixes (options):
13744 - Check the consistency of UseEntryGuards and EntryNodes more
13745 reliably. Fixes bug 20074; bugfix on 0.2.4.12-alpha. Patch
13747 - Stop changing the configured value of UseEntryGuards on
13748 authorities and Tor2web clients. Fixes bug 20074; bugfix on
13749 commits 51fc6799 in 0.1.1.16-rc and acda1735 in 0.2.4.3-alpha.
13752 o Minor bugfixes (Tor2web):
13753 - Prevent Tor2web clients running hidden services, these services
13754 are not anonymous due to the one-hop client paths. Fixes bug
13755 19678. Patch by teor.
13757 o Minor bugfixes (unit tests):
13758 - Fix a shared-random unit test that was failing on big endian
13759 architectures due to internal representation of a integer copied
13760 to a buffer. The test is changed to take a full 32 bytes of data
13761 and use the output of a python script that make the COMMIT and
13762 REVEAL calculation according to the spec. Fixes bug 19977; bugfix
13764 - The tor_tls_server_info_callback unit test no longer crashes when
13765 debug-level logging is turned on. Fixes bug 20041; bugfix
13769 Changes in version 0.2.8.8 - 2016-09-23
13770 Tor 0.2.8.8 fixes two crash bugs present in previous versions of the
13771 0.2.8.x series. Relays running 0.2.8.x should upgrade, as should users
13772 who select public relays as their bridges.
13774 o Major bugfixes (crash):
13775 - Fix a complicated crash bug that could affect Tor clients
13776 configured to use bridges when replacing a networkstatus consensus
13777 in which one of their bridges was mentioned. OpenBSD users saw
13778 more crashes here, but all platforms were potentially affected.
13779 Fixes bug 20103; bugfix on 0.2.8.2-alpha.
13781 o Major bugfixes (relay, OOM handler):
13782 - Fix a timing-dependent assertion failure that could occur when we
13783 tried to flush from a circuit after having freed its cells because
13784 of an out-of-memory condition. Fixes bug 20203; bugfix on
13785 0.2.8.1-alpha. Thanks to "cypherpunks" for help diagnosing
13788 o Minor feature (fallback directories):
13789 - Remove 8 fallbacks that are no longer suitable, leaving 81 of the
13790 100 fallbacks originally introduced in Tor 0.2.8.2-alpha in March
13791 2016. Closes ticket 20190; patch by teor.
13793 o Minor features (geoip):
13794 - Update geoip and geoip6 to the September 6 2016 Maxmind GeoLite2
13798 Changes in version 0.2.9.2-alpha - 2016-08-24
13799 Tor 0.2.9.2-alpha continues development of the 0.2.9 series with
13800 several new features and bugfixes. It also includes an important
13801 authority update and an important bugfix from 0.2.8.7. Everyone who
13802 sets the ReachableAddresses option, and all bridges, are strongly
13803 encouraged to upgrade to 0.2.8.7, or to 0.2.9.2-alpha.
13805 o Directory authority changes (also in 0.2.8.7):
13806 - The "Tonga" bridge authority has been retired; the new bridge
13807 authority is "Bifroest". Closes tickets 19728 and 19690.
13809 o Major bugfixes (client, security, also in 0.2.8.7):
13810 - Only use the ReachableAddresses option to restrict the first hop
13811 in a path. In earlier versions of 0.2.8.x, it would apply to
13812 every hop in the path, with a possible degradation in anonymity
13813 for anyone using an uncommon ReachableAddress setting. Fixes bug
13814 19973; bugfix on 0.2.8.2-alpha.
13816 o Major features (user interface):
13817 - Tor now supports the ability to declare options deprecated, so
13818 that we can recommend that people stop using them. Previously,
13819 this was done in an ad-hoc way. Closes ticket 19820.
13821 o Major bugfixes (directory downloads):
13822 - Avoid resetting download status for consensuses hourly, since we
13823 already have another, smarter retry mechanism. Fixes bug 8625;
13824 bugfix on 0.2.0.9-alpha.
13826 o Minor features (config):
13827 - Warn users when descriptor and port addresses are inconsistent.
13828 Mitigates bug 13953; patch by teor.
13830 o Minor features (geoip):
13831 - Update geoip and geoip6 to the August 2 2016 Maxmind GeoLite2
13834 o Minor features (user interface):
13835 - There is a new --list-deprecated-options command-line option to
13836 list all of the deprecated options. Implemented as part of
13839 o Minor bugfixes (code style):
13840 - Fix an integer signedness conversion issue in the case conversion
13841 tables. Fixes bug 19168; bugfix on 0.2.1.11-alpha.
13843 o Minor bugfixes (compilation):
13844 - Build correctly on versions of libevent2 without support for
13845 evutil_secure_rng_add_bytes(). Fixes bug 19904; bugfix
13847 - Fix a compilation warning on GCC versions before 4.6. Our
13848 ENABLE_GCC_WARNING macro used the word "warning" as an argument,
13849 when it is also required as an argument to the compiler pragma.
13850 Fixes bug 19901; bugfix on 0.2.9.1-alpha.
13852 o Minor bugfixes (compilation, also in 0.2.8.7):
13853 - Remove an inappropriate "inline" in tortls.c that was causing
13854 warnings on older versions of GCC. Fixes bug 19903; bugfix
13857 o Minor bugfixes (fallback directories, also in 0.2.8.7):
13858 - Avoid logging a NULL string pointer when loading fallback
13859 directory information. Fixes bug 19947; bugfix on 0.2.4.7-alpha
13860 and 0.2.8.1-alpha. Report and patch by "rubiate".
13862 o Minor bugfixes (logging):
13863 - Log a more accurate message when we fail to dump a microdescriptor.
13864 Fixes bug 17758; bugfix on 0.2.2.8-alpha. Patch from Daniel Pinto.
13866 o Minor bugfixes (memory leak):
13867 - Fix a series of slow memory leaks related to parsing torrc files
13868 and options. Fixes bug 19466; bugfix on 0.2.1.6-alpha.
13870 o Deprecated features:
13871 - A number of DNS-cache-related sub-options for client ports are now
13872 deprecated for security reasons, and may be removed in a future
13873 version of Tor. (We believe that client-side DNS caching is a bad
13874 idea for anonymity, and you should not turn it on.) The options
13875 are: CacheDNS, CacheIPv4DNS, CacheIPv6DNS, UseDNSCache,
13876 UseIPv4Cache, and UseIPv6Cache.
13877 - A number of options are deprecated for security reasons, and may
13878 be removed in a future version of Tor. The options are:
13879 AllowDotExit, AllowInvalidNodes, AllowSingleHopCircuits,
13880 AllowSingleHopExits, ClientDNSRejectInternalAddresses,
13881 CloseHSClientCircuitsImmediatelyOnTimeout,
13882 CloseHSServiceRendCircuitsImmediatelyOnTimeout,
13883 ExcludeSingleHopRelays, FastFirstHopPK, TLSECGroup,
13884 UseNTorHandshake, and WarnUnsafeSocks.
13885 - The *ListenAddress options are now deprecated as unnecessary: the
13886 corresponding *Port options should be used instead. These options
13887 may someday be removed. The affected options are:
13888 ControlListenAddress, DNSListenAddress, DirListenAddress,
13889 NATDListenAddress, ORListenAddress, SocksListenAddress,
13890 and TransListenAddress.
13893 - Correct the IPv6 syntax in our documentation for the
13894 VirtualAddrNetworkIPv6 torrc option. Closes ticket 19743.
13897 - We no longer include the (dead, deprecated) bufferevent code in
13898 Tor. Closes ticket 19450. Based on a patch from U+039b.
13901 Changes in version 0.2.8.7 - 2016-08-24
13902 Tor 0.2.8.7 fixes an important bug related to the ReachableAddresses
13903 option in 0.2.8.6, and replaces a retiring bridge authority. Everyone
13904 who sets the ReachableAddresses option, and all bridges, are strongly
13905 encouraged to upgrade.
13907 o Directory authority changes:
13908 - The "Tonga" bridge authority has been retired; the new bridge
13909 authority is "Bifroest". Closes tickets 19728 and 19690.
13911 o Major bugfixes (client, security):
13912 - Only use the ReachableAddresses option to restrict the first hop
13913 in a path. In earlier versions of 0.2.8.x, it would apply to
13914 every hop in the path, with a possible degradation in anonymity
13915 for anyone using an uncommon ReachableAddress setting. Fixes bug
13916 19973; bugfix on 0.2.8.2-alpha.
13918 o Minor features (geoip):
13919 - Update geoip and geoip6 to the August 2 2016 Maxmind GeoLite2
13922 o Minor bugfixes (compilation):
13923 - Remove an inappropriate "inline" in tortls.c that was causing
13924 warnings on older versions of GCC. Fixes bug 19903; bugfix
13927 o Minor bugfixes (fallback directories):
13928 - Avoid logging a NULL string pointer when loading fallback
13929 directory information. Fixes bug 19947; bugfix on 0.2.4.7-alpha
13930 and 0.2.8.1-alpha. Report and patch by "rubiate".
13933 Changes in version 0.2.9.1-alpha - 2016-08-08
13934 Tor 0.2.9.1-alpha is the first alpha release in the 0.2.9 development
13935 series. It improves our support for hardened builds and compiler
13936 warnings, deploys some critical infrastructure for improvements to
13937 hidden services, includes a new timing backend that we hope to use for
13938 better support for traffic padding, makes it easier for programmers to
13939 log unexpected events, and contains other small improvements to
13940 security, correctness, and performance.
13942 Below are the changes since 0.2.8.6.
13944 o New system requirements:
13945 - Tor now requires Libevent version 2.0.10-stable or later. Older
13946 versions of Libevent have less efficient backends for several
13947 platforms, and lack the DNS code that we use for our server-side
13948 DNS support. This implements ticket 19554.
13949 - Tor now requires zlib version 1.2 or later, for security,
13950 efficiency, and (eventually) gzip support. (Back when we started,
13951 zlib 1.1 and zlib 1.0 were still found in the wild. 1.2 was
13952 released in 2003. We recommend the latest version.)
13954 o Major features (build, hardening):
13955 - Tor now builds with -ftrapv by default on compilers that support
13956 it. This option detects signed integer overflow (which C forbids),
13957 and turns it into a hard-failure. We do not apply this option to
13958 code that needs to run in constant time to avoid side-channels;
13959 instead, we use -fwrapv in that code. Closes ticket 17983.
13960 - When --enable-expensive-hardening is selected, stop applying the
13961 clang/gcc sanitizers to code that needs to run in constant time.
13962 Although we are aware of no introduced side-channels, we are not
13963 able to prove that there are none. Related to ticket 17983.
13965 o Major features (compilation):
13966 - Our big list of extra GCC warnings is now enabled by default when
13967 building with GCC (or with anything like Clang that claims to be
13968 GCC-compatible). To make all warnings into fatal compilation
13969 errors, pass --enable-fatal-warnings to configure. Closes
13971 - Use the Autoconf macro AC_USE_SYSTEM_EXTENSIONS to automatically
13972 turn on C and POSIX extensions. (Previously, we attempted to do
13973 this on an ad hoc basis.) Closes ticket 19139.
13975 o Major features (directory authorities, hidden services):
13976 - Directory authorities can now perform the shared randomness
13977 protocol specified by proposal 250. Using this protocol, directory
13978 authorities generate a global fresh random value every day. In the
13979 future, this value will be used by hidden services to select
13980 HSDirs. This release implements the directory authority feature;
13981 the hidden service side will be implemented in the future as part
13982 of proposal 224. Resolves ticket 16943; implements proposal 250.
13984 o Major features (downloading, random exponential backoff):
13985 - When we fail to download an object from a directory service, wait
13986 for an (exponentially increasing) randomized amount of time before
13987 retrying, rather than a fixed interval as we did before. This
13988 prevents a group of Tor instances from becoming too synchronized,
13989 or a single Tor instance from becoming too predictable, in its
13990 download schedule. Closes ticket 15942.
13992 o Major bugfixes (exit policies):
13993 - Avoid disclosing exit outbound bind addresses, configured port
13994 bind addresses, and local interface addresses in relay descriptors
13995 by default under ExitPolicyRejectPrivate. Instead, only reject
13996 these (otherwise unlisted) addresses if
13997 ExitPolicyRejectLocalInterfaces is set. Fixes bug 18456; bugfix on
13998 0.2.7.2-alpha. Patch by teor.
14000 o Major bugfixes (hidden service client):
14001 - Allow Tor clients with appropriate controllers to work with
14002 FetchHidServDescriptors set to 0. Previously, this option also
14003 disabled descriptor cache lookup, thus breaking hidden services
14004 entirely. Fixes bug 18704; bugfix on 0.2.0.20-rc. Patch by "twim".
14006 o Minor features (build, hardening):
14007 - Detect and work around a libclang_rt problem that would prevent
14008 clang from finding __mulodi4() on some 32-bit platforms, and thus
14009 keep -ftrapv from linking on those systems. Closes ticket 19079.
14010 - When building on a system without runtime support for the runtime
14011 hardening options, try to log a useful warning at configuration
14012 time, rather than an incomprehensible warning at link time. If
14013 expensive hardening was requested, this warning becomes an error.
14014 Closes ticket 18895.
14016 o Minor features (code safety):
14017 - In our integer-parsing functions, ensure that maxiumum value we
14018 give is no smaller than the minimum value. Closes ticket 19063;
14021 o Minor features (controller):
14022 - Implement new GETINFO queries for all downloads that use
14023 download_status_t to schedule retries. This allows controllers to
14024 examine the schedule for pending downloads. Closes ticket 19323.
14025 - Allow controllers to configure basic client authorization on
14026 hidden services when they create them with the ADD_ONION control
14027 command. Implements ticket 15588. Patch by "special".
14028 - Fire a STATUS_SERVER controller event whenever the hibernation
14029 status changes between "awake"/"soft"/"hard". Closes ticket 18685.
14031 o Minor features (directory authority):
14032 - Directory authorities now only give the Guard flag to a relay if
14033 they are also giving it the Stable flag. This change allows us to
14034 simplify path selection for clients. It should have minimal effect
14035 in practice, since >99% of Guards already have the Stable flag.
14036 Implements ticket 18624.
14037 - Directory authorities now write their v3-status-votes file out to
14038 disk earlier in the consensus process, so we have a record of the
14039 votes even if we abort the consensus process. Resolves
14042 o Minor features (hidden service):
14043 - Stop being so strict about the payload length of "rendezvous1"
14044 cells. We used to be locked in to the "TAP" handshake length, and
14045 now we can handle better handshakes like "ntor". Resolves
14048 o Minor features (infrastructure, time):
14049 - Tor now uses the operating system's monotonic timers (where
14050 available) for internal fine-grained timing. Previously we would
14051 look at the system clock, and then attempt to compensate for the
14052 clock running backwards. Closes ticket 18908.
14053 - Tor now includes an improved timer backend, so that we can
14054 efficiently support tens or hundreds of thousands of concurrent
14055 timers, as will be needed for some of our planned anti-traffic-
14056 analysis work. This code is based on William Ahern's "timeout.c"
14057 project, which implements a "tickless hierarchical timing wheel".
14058 Closes ticket 18365.
14060 o Minor features (logging):
14061 - Provide a more useful warning message when configured with an
14062 invalid Nickname. Closes ticket 18300; patch from "icanhasaccount".
14063 - When dumping unparseable router descriptors, optionally store them
14064 in separate files, named by digest, up to a configurable size
14065 limit. You can change the size limit by setting the
14066 MaxUnparseableDescSizeToLog option, and disable this feature by
14067 setting that option to 0. Closes ticket 18322.
14068 - Add a set of macros to check nonfatal assertions, for internal
14069 use. Migrating more of our checks to these should help us avoid
14070 needless crash bugs. Closes ticket 18613.
14072 o Minor features (performance):
14073 - Change the "optimistic data" extension from "off by default" to
14074 "on by default". The default was ordinarily overridden by a
14075 consensus option, but when clients were bootstrapping for the
14076 first time, they would not have a consensus to get the option
14077 from. Changing this default saves a round-trip during startup.
14078 Closes ticket 18815.
14080 o Minor features (relay, usability):
14081 - When the directory authorities refuse a bad relay's descriptor,
14082 encourage the relay operator to contact us. Many relay operators
14083 won't notice this line in their logs, but it's a win if even a few
14084 learn why we don't like what their relay was doing. Resolves
14087 o Minor features (testing):
14088 - Let backtrace tests work correctly under AddressSanitizer. Fixes
14089 part of bug 18934; bugfix on 0.2.5.2-alpha.
14090 - Move the test-network.sh script to chutney, and modify tor's test-
14091 network.sh to call the (newer) chutney version when available.
14092 Resolves ticket 19116. Patch by teor.
14093 - Use the lcov convention for marking lines as unreachable, so that
14094 we don't count them when we're generating test coverage data.
14095 Update our coverage tools to understand this convention. Closes
14098 o Minor bugfixes (bootstrap):
14099 - Remember the directory we fetched the consensus or previous
14100 certificates from, and use it to fetch future authority
14101 certificates. This change improves bootstrapping performance.
14102 Fixes bug 18963; bugfix on 0.2.8.1-alpha.
14104 o Minor bugfixes (build):
14105 - The test-stem and test-network makefile targets now depend only on
14106 the tor binary that they are testing. Previously, they depended on
14107 "make all". Fixes bug 18240; bugfix on 0.2.8.2-alpha. Based on a
14108 patch from "cypherpunks".
14110 o Minor bugfixes (circuits):
14111 - Make sure extend_info_from_router() is only called on servers.
14112 Fixes bug 19639; bugfix on 0.2.8.1-alpha.
14114 o Minor bugfixes (compilation):
14115 - When building with Clang, use a full set of GCC warnings.
14116 (Previously, we included only a subset, because of the way we
14117 detected them.) Fixes bug 19216; bugfix on 0.2.0.1-alpha.
14119 o Minor bugfixes (directory authority):
14120 - Authorities now sort the "package" lines in their votes, for ease
14121 of debugging. (They are already sorted in consensus documents.)
14122 Fixes bug 18840; bugfix on 0.2.6.3-alpha.
14123 - When parsing a detached signature, make sure we use the length of
14124 the digest algorithm instead of an hardcoded DIGEST256_LEN in
14125 order to avoid comparing bytes out-of-bounds with a smaller digest
14126 length such as SHA1. Fixes bug 19066; bugfix on 0.2.2.6-alpha.
14128 o Minor bugfixes (documentation):
14129 - Document the --passphrase-fd option in the tor manpage. Fixes bug
14130 19504; bugfix on 0.2.7.3-rc.
14131 - Fix the description of the --passphrase-fd option in the
14132 tor-gencert manpage. The option is used to pass the number of a
14133 file descriptor to read the passphrase from, not to read the file
14134 descriptor from. Fixes bug 19505; bugfix on 0.2.0.20-alpha.
14136 o Minor bugfixes (ephemeral hidden service):
14137 - When deleting an ephemeral hidden service, close its intro points
14138 even if they are not completely open. Fixes bug 18604; bugfix
14141 o Minor bugfixes (guard selection):
14142 - Use a single entry guard even if the NumEntryGuards consensus
14143 parameter is not provided. Fixes bug 17688; bugfix
14145 - Don't mark guards as unreachable if connection_connect() fails.
14146 That function fails for local reasons, so it shouldn't reveal
14147 anything about the status of the guard. Fixes bug 14334; bugfix
14150 o Minor bugfixes (hidden service client):
14151 - Increase the minimum number of internal circuits we preemptively
14152 build from 2 to 3, so a circuit is available when a client
14153 connects to another onion service. Fixes bug 13239; bugfix
14156 o Minor bugfixes (logging):
14157 - When logging a directory ownership mismatch, log the owning
14158 username correctly. Fixes bug 19578; bugfix on 0.2.2.29-beta.
14160 o Minor bugfixes (memory leaks):
14161 - Fix a small, uncommon memory leak that could occur when reading a
14162 truncated ed25519 key file. Fixes bug 18956; bugfix
14165 o Minor bugfixes (testing):
14166 - Allow clients to retry HSDirs much faster in test networks. Fixes
14167 bug 19702; bugfix on 0.2.7.1-alpha. Patch by teor.
14168 - Disable ASAN's detection of segmentation faults while running
14169 test_bt.sh, so that we can make sure that our own backtrace
14170 generation code works. Fixes another aspect of bug 18934; bugfix
14171 on 0.2.5.2-alpha. Patch from "cypherpunks".
14172 - Fix the test-network-all target on out-of-tree builds by using the
14173 correct path to the test driver script. Fixes bug 19421; bugfix
14176 o Minor bugfixes (time):
14177 - Improve overflow checks in tv_udiff and tv_mdiff. Fixes bug 19483;
14178 bugfix on all released tor versions.
14179 - When computing the difference between two times in milliseconds,
14180 we now round to the nearest millisecond correctly. Previously, we
14181 could sometimes round in the wrong direction. Fixes bug 19428;
14182 bugfix on 0.2.2.2-alpha.
14184 o Minor bugfixes (user interface):
14185 - Display a more accurate number of suppressed messages in the log
14186 rate-limiter. Previously, there was a potential integer overflow
14187 in the counter. Now, if the number of messages hits a maximum, the
14188 rate-limiter doesn't count any further. Fixes bug 19435; bugfix
14190 - Fix a typo in the passphrase prompt for the ed25519 identity key.
14191 Fixes bug 19503; bugfix on 0.2.7.2-alpha.
14193 o Code simplification and refactoring:
14194 - Remove redundant declarations of the MIN macro. Closes
14196 - Rename tor_dup_addr() to tor_addr_to_str_dup() to avoid confusion.
14197 Closes ticket 18462; patch from "icanhasaccount".
14198 - Split the 600-line directory_handle_command_get function into
14199 separate functions for different URL types. Closes ticket 16698.
14202 - Fix spelling of "--enable-tor2web-mode" in the manpage. Closes
14203 ticket 19153. Patch from "U+039b".
14205 o Removed features:
14206 - Remove support for "GET /tor/bytes.txt" DirPort request, and
14207 "GETINFO dir-usage" controller request, which were only available
14208 via a compile-time option in Tor anyway. Feature was added in
14209 0.2.2.1-alpha. Resolves ticket 19035.
14210 - There is no longer a compile-time option to disable support for
14211 TransPort. (If you don't want TransPort; just don't use it.) Patch
14212 from "U+039b". Closes ticket 19449.
14215 - Run more workqueue tests as part of "make check". These had
14216 previously been implemented, but you needed to know special
14217 command-line options to enable them.
14218 - We now have unit tests for our code to reject zlib "compression
14219 bombs". (Fortunately, the code works fine.)
14222 Changes in version 0.2.8.6 - 2016-08-02
14224 Tor 0.2.8.6 is the first stable version of the Tor 0.2.8 series.
14226 The Tor 0.2.8 series improves client bootstrapping performance,
14227 completes the authority-side implementation of improved identity
14228 keys for relays, and includes numerous bugfixes and performance
14229 improvements throughout the program. This release continues to
14230 improve the coverage of Tor's test suite. For a full list of
14231 changes since Tor 0.2.7, see the ReleaseNotes file.
14233 Changes since 0.2.8.5-rc:
14235 o Minor features (geoip):
14236 - Update geoip and geoip6 to the July 6 2016 Maxmind GeoLite2
14239 o Minor bugfixes (compilation):
14240 - Fix a compilation warning in the unit tests on systems where char
14241 is signed. Fixes bug 19682; bugfix on 0.2.8.1-alpha.
14243 o Minor bugfixes (fallback directories):
14244 - Remove 1 fallback that was on the hardcoded list, then opted-out,
14245 leaving 89 of the 100 fallbacks originally introduced in Tor
14246 0.2.8.2-alpha in March 2016. Closes ticket 19782; patch by teor.
14248 o Minor bugfixes (Linux seccomp2 sandbox):
14249 - Allow more syscalls when running with "Sandbox 1" enabled:
14250 sysinfo, getsockopt(SO_SNDBUF), and setsockopt(SO_SNDBUFFORCE). On
14251 some systems, these are required for Tor to start. Fixes bug
14252 18397; bugfix on 0.2.5.1-alpha. Patch from Daniel Pinto.
14253 - Allow IPPROTO_UDP datagram sockets when running with "Sandbox 1",
14254 so that get_interface_address6_via_udp_socket_hack() can work.
14255 Fixes bug 19660; bugfix on 0.2.5.1-alpha.
14258 Changes in version 0.2.8.5-rc - 2016-07-07
14259 Tor 0.2.8.5-rc is the second release candidate in the Tor 0.2.8
14260 series. If we find no new bugs or regressions here, the first stable
14261 0.2.8 release will be identical to it. It has a few small bugfixes
14262 against previous versions.
14264 o Directory authority changes:
14265 - Urras is no longer a directory authority. Closes ticket 19271.
14267 o Major bugfixes (heartbeat):
14268 - Fix a regression that would crash Tor when the periodic
14269 "heartbeat" log messages were disabled. Fixes bug 19454; bugfix on
14270 0.2.8.1-alpha. Reported by "kubaku".
14272 o Minor features (build):
14273 - Tor now again builds with the recent OpenSSL 1.1 development
14274 branch (tested against 1.1.0-pre6-dev). Closes ticket 19499.
14275 - When building manual pages, set the timezone to "UTC", so that the
14276 output is reproducible. Fixes bug 19558; bugfix on 0.2.2.9-alpha.
14277 Patch from intrigeri.
14279 o Minor bugfixes (fallback directory selection):
14280 - Avoid errors during fallback selection if there are no eligible
14281 fallbacks. Fixes bug 19480; bugfix on 0.2.8.3-alpha. Patch
14284 o Minor bugfixes (IPv6, microdescriptors):
14285 - Don't check node addresses when we only have a routerstatus. This
14286 allows IPv6-only clients to bootstrap by fetching microdescriptors
14287 from fallback directory mirrors. (The microdescriptor consensus
14288 has no IPv6 addresses in it.) Fixes bug 19608; bugfix
14291 o Minor bugfixes (logging):
14292 - Reduce pointlessly verbose log messages when directory servers
14293 can't be found. Fixes bug 18849; bugfix on 0.2.8.3-alpha and
14294 0.2.8.1-alpha. Patch by teor.
14295 - When a fallback directory changes its fingerprint from the hard-
14296 coded fingerprint, log a less severe, more explanatory log
14297 message. Fixes bug 18812; bugfix on 0.2.8.1-alpha. Patch by teor.
14299 o Minor bugfixes (Linux seccomp2 sandboxing):
14300 - Allow statistics to be written to disk when "Sandbox 1" is
14301 enabled. Fixes bugs 19556 and 19957; bugfix on 0.2.5.1-alpha and
14302 0.2.6.1-alpha respectively.
14304 o Minor bugfixes (user interface):
14305 - Remove a warning message "Service [scrubbed] not found after
14306 descriptor upload". This message appears when one uses HSPOST
14307 control command to upload a service descriptor. Since there is
14308 only a descriptor and no service, showing this message is
14309 pointless and confusing. Fixes bug 19464; bugfix on 0.2.7.2-alpha.
14311 o Fallback directory list:
14312 - Add a comment to the generated fallback directory list that
14313 explains how to comment out unsuitable fallbacks in a way that's
14314 compatible with the stem fallback parser.
14315 - Update fallback whitelist and blacklist based on relay operator
14316 emails. Blacklist unsuitable (non-working, over-volatile)
14317 fallbacks. Resolves ticket 19071. Patch by teor.
14318 - Remove 10 unsuitable fallbacks, leaving 90 of the 100 fallbacks
14319 originally introduced in Tor 0.2.8.2-alpha in March 2016. Closes
14320 ticket 19071; patch by teor.
14323 Changes in version 0.2.8.4-rc - 2016-06-15
14324 Tor 0.2.8.4-rc is the first release candidate in the Tor 0.2.8 series.
14325 If we find no new bugs or regressions here, the first stable 0.2.8
14326 release will be identical to it. It has a few small bugfixes against
14329 o Major bugfixes (user interface):
14330 - Correctly give a warning in the cases where a relay is specified
14331 by nickname, and one such relay is found, but it is not officially
14332 Named. Fixes bug 19203; bugfix on 0.2.3.1-alpha.
14334 o Minor features (build):
14335 - Tor now builds once again with the recent OpenSSL 1.1 development
14336 branch (tested against 1.1.0-pre5 and 1.1.0-pre6-dev).
14338 o Minor features (geoip):
14339 - Update geoip and geoip6 to the June 7 2016 Maxmind GeoLite2
14342 o Minor bugfixes (compilation):
14343 - Cause the unit tests to compile correctly on mingw64 versions that
14344 lack sscanf. Fixes bug 19213; bugfix on 0.2.7.1-alpha.
14346 o Minor bugfixes (downloading):
14347 - Predict more correctly whether we'll be downloading over HTTP when
14348 we determine the maximum length of a URL. This should avoid a
14349 "BUG" warning about the Squid HTTP proxy and its URL limits. Fixes
14353 Changes in version 0.2.8.3-alpha - 2016-05-26
14354 Tor 0.2.8.3-alpha resolves several bugs, most of them introduced over
14355 the course of the 0.2.8 development cycle. It improves the behavior of
14356 directory clients, fixes several crash bugs, fixes a gap in compiler
14357 hardening, and allows the full integration test suite to run on
14360 o Major bugfixes (security, client, DNS proxy):
14361 - Stop a crash that could occur when a client running with DNSPort
14362 received a query with multiple address types, and the first
14363 address type was not supported. Found and fixed by Scott Dial.
14364 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
14366 o Major bugfixes (security, compilation):
14367 - Correctly detect compiler flags on systems where _FORTIFY_SOURCE
14368 is predefined. Previously, our use of -D_FORTIFY_SOURCE would
14369 cause a compiler warning, thereby making other checks fail, and
14370 needlessly disabling compiler-hardening support. Fixes one case of
14371 bug 18841; bugfix on 0.2.3.17-beta. Patch from "trudokal".
14373 o Major bugfixes (security, directory authorities):
14374 - Fix a crash and out-of-bounds write during authority voting, when
14375 the list of relays includes duplicate ed25519 identity keys. Fixes
14376 bug 19032; bugfix on 0.2.8.2-alpha.
14378 o Major bugfixes (client, bootstrapping):
14379 - Check if bootstrap consensus downloads are still needed when the
14380 linked connection attaches. This prevents tor making unnecessary
14381 begindir-style connections, which are the only directory
14382 connections tor clients make since the fix for 18483 was merged.
14383 - Fix some edge cases where consensus download connections may not
14384 have been closed, even though they were not needed. Related to fix
14386 - Make relays retry consensus downloads the correct number of times,
14387 rather than the more aggressive client retry count. Fixes part of
14389 - Stop downloading consensuses when we have a consensus, even if we
14390 don't have all the certificates for it yet. Fixes bug 18809;
14391 bugfix on 0.2.8.1-alpha. Patches by arma and teor.
14393 o Major bugfixes (directory mirrors):
14394 - Decide whether to advertise begindir support in the the same way
14395 we decide whether to advertise our DirPort. Allowing these
14396 decisions to become out-of-sync led to surprising behavior like
14397 advertising begindir support when hibernation made us not
14398 advertise a DirPort. Resolves bug 18616; bugfix on 0.2.8.1-alpha.
14401 o Major bugfixes (IPv6 bridges, client):
14402 - Actually use IPv6 addresses when selecting directory addresses for
14403 IPv6 bridges. Fixes bug 18921; bugfix on 0.2.8.1-alpha. Patch
14406 o Major bugfixes (key management):
14407 - If OpenSSL fails to generate an RSA key, do not retain a dangling
14408 pointer to the previous (uninitialized) key value. The impact here
14409 should be limited to a difficult-to-trigger crash, if OpenSSL is
14410 running an engine that makes key generation failures possible, or
14411 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
14412 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
14415 o Major bugfixes (testing):
14416 - Fix a bug that would block 'make test-network-all' on systems where
14417 IPv6 packets were lost. Fixes bug 19008; bugfix on 0.2.7.3-rc.
14418 - Avoid "WSANOTINITIALISED" warnings in the unit tests. Fixes bug 18668;
14419 bugfix on 0.2.8.1-alpha.
14421 o Minor features (clients):
14422 - Make clients, onion services, and bridge relays always use an
14423 encrypted begindir connection for directory requests. Resolves
14424 ticket 18483. Patch by "teor".
14426 o Minor features (fallback directory mirrors):
14427 - Give each fallback the same weight for client selection; restrict
14428 fallbacks to one per operator; report fallback directory detail
14429 changes when rebuilding list; add new fallback directory mirrors
14430 to the whitelist; and many other minor simplifications and fixes.
14431 Closes tasks 17905, 18749, bug 18689, and fixes part of bug 18812 on
14432 0.2.8.1-alpha; patch by "teor".
14433 - Replace the 21 fallbacks generated in January 2016 and included in
14434 Tor 0.2.8.1-alpha, with a list of 100 fallbacks generated in March
14435 2016. Closes task 17158; patch by "teor".
14437 o Minor features (geoip):
14438 - Update geoip and geoip6 to the May 4 2016 Maxmind GeoLite2
14441 o Minor bugfixes (assert, portability):
14442 - Fix an assertion failure in memarea.c on systems where "long" is
14443 shorter than the size of a pointer. Fixes bug 18716; bugfix
14446 o Minor bugfixes (bootstrap):
14447 - Consistently use the consensus download schedule for authority
14448 certificates. Fixes bug 18816; bugfix on 0.2.4.13-alpha.
14450 o Minor bugfixes (build):
14451 - Remove a pair of redundant AM_CONDITIONAL declarations from
14452 configure.ac. Fixes one final case of bug 17744; bugfix
14454 - Resolve warnings when building on systems that are concerned with
14455 signed char. Fixes bug 18728; bugfix on 0.2.7.2-alpha
14457 - When libscrypt.h is found, but no libscrypt library can be linked,
14458 treat libscrypt as absent. Fixes bug 19161; bugfix
14461 o Minor bugfixes (client):
14462 - Turn all TestingClientBootstrap* into non-testing torrc options.
14463 This changes simply renames them by removing "Testing" in front of
14464 them and they do not require TestingTorNetwork to be enabled
14465 anymore. Fixes bug 18481; bugfix on 0.2.8.1-alpha.
14466 - Make directory node selection more reliable, mainly for IPv6-only
14467 clients and clients with few reachable addresses. Fixes bug 18929;
14468 bugfix on 0.2.8.1-alpha. Patch by "teor".
14470 o Minor bugfixes (controller, microdescriptors):
14471 - Make GETINFO dir/status-vote/current/consensus conform to the
14472 control specification by returning "551 Could not open cached
14473 consensus..." when not caching consensuses. Fixes bug 18920;
14474 bugfix on 0.2.2.6-alpha.
14476 o Minor bugfixes (crypto, portability):
14477 - The SHA3 and SHAKE routines now produce the correct output on Big
14478 Endian systems. No code calls either algorithm yet, so this is
14479 primarily a build fix. Fixes bug 18943; bugfix on 0.2.8.1-alpha.
14480 - Tor now builds again with the recent OpenSSL 1.1 development
14481 branch (tested against 1.1.0-pre4 and 1.1.0-pre5-dev). Closes
14484 o Minor bugfixes (directories):
14485 - When fetching extrainfo documents, compare their SHA256 digests
14486 and Ed25519 signing key certificates with the routerinfo that led
14487 us to fetch them, rather than with the most recent routerinfo.
14488 Otherwise we generate many spurious warnings about mismatches.
14489 Fixes bug 17150; bugfix on 0.2.7.2-alpha.
14491 o Minor bugfixes (logging):
14492 - When we can't generate a signing key because OfflineMasterKey is
14493 set, do not imply that we should have been able to load it. Fixes
14494 bug 18133; bugfix on 0.2.7.2-alpha.
14495 - Stop periodic_event_dispatch() from blasting twelve lines per
14496 second at loglevel debug. Fixes bug 18729; fix on 0.2.8.1-alpha.
14497 - When rejecting a misformed INTRODUCE2 cell, only log at
14498 PROTOCOL_WARN severity. Fixes bug 18761; bugfix on 0.2.8.2-alpha.
14500 o Minor bugfixes (pluggable transports):
14501 - Avoid reporting a spurious error when we decide that we don't need
14502 to terminate a pluggable transport because it has already exited.
14503 Fixes bug 18686; bugfix on 0.2.5.5-alpha.
14505 o Minor bugfixes (pointer arithmetic):
14506 - Fix a bug in memarea_alloc() that could have resulted in remote
14507 heap write access, if Tor had ever passed an unchecked size to
14508 memarea_alloc(). Fortunately, all the sizes we pass to
14509 memarea_alloc() are pre-checked to be less than 128 kilobytes.
14510 Fixes bug 19150; bugfix on 0.2.1.1-alpha. Bug found by
14513 o Minor bugfixes (relays):
14514 - Consider more config options when relays decide whether to
14515 regenerate their descriptor. Fixes more of bug 12538; bugfix
14517 - Resolve some edge cases where we might launch an ORPort
14518 reachability check even when DisableNetwork is set. Noticed while
14519 fixing bug 18616; bugfix on 0.2.3.9-alpha.
14521 o Minor bugfixes (statistics):
14522 - We now include consensus downloads via IPv6 in our directory-
14523 request statistics. Fixes bug 18460; bugfix on 0.2.3.14-alpha.
14525 o Minor bugfixes (testing):
14526 - Allow directories in small networks to bootstrap by skipping
14527 DirPort checks when the consensus has no exits. Fixes bug 19003;
14528 bugfix on 0.2.8.1-alpha. Patch by teor.
14529 - Fix a small memory leak that would occur when the
14530 TestingEnableCellStatsEvent option was turned on. Fixes bug 18673;
14531 bugfix on 0.2.5.2-alpha.
14533 o Minor bugfixes (time handling):
14534 - When correcting a corrupt 'struct tm' value, fill in the tm_wday
14535 field. Otherwise, our unit tests crash on Windows. Fixes bug
14536 18977; bugfix on 0.2.2.25-alpha.
14539 - Document the contents of the 'datadir/keys' subdirectory in the
14540 manual page. Closes ticket 17621.
14541 - Stop recommending use of nicknames to identify relays in our
14542 MapAddress documentation. Closes ticket 18312.
14545 Changes in version 0.2.8.2-alpha - 2016-03-28
14546 Tor 0.2.8.2-alpha is the second alpha in its series. It fixes numerous
14547 bugs in earlier versions of Tor, including some that prevented
14548 authorities using Tor 0.2.7.x from running correctly. IPv6 and
14549 directory support should also be much improved.
14551 o New system requirements:
14552 - Tor no longer supports versions of OpenSSL with a broken
14553 implementation of counter mode. (This bug was present in OpenSSL
14554 1.0.0, and was fixed in OpenSSL 1.0.0a.) Tor still detects, but no
14555 longer runs with, these versions.
14556 - Tor no longer attempts to support platforms where the "time_t"
14557 type is unsigned. (To the best of our knowledge, only OpenVMS does
14558 this, and Tor has never actually built on OpenVMS.) Closes
14560 - Tor now uses Autoconf version 2.63 or later, and Automake 1.11 or
14561 later (released in 2008 and 2009 respectively). If you are
14562 building Tor from the git repository instead of from the source
14563 distribution, and your tools are older than this, you will need to
14564 upgrade. Closes ticket 17732.
14566 o Major bugfixes (security, pointers):
14567 - Avoid a difficult-to-trigger heap corruption attack when extending
14568 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
14569 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
14570 Reported by Guido Vranken.
14572 o Major bugfixes (bridges, pluggable transports):
14573 - Modify the check for OR connections to private addresses. Allow
14574 bridges on private addresses, including pluggable transports that
14575 ignore the (potentially private) address in the bridge line. Fixes
14576 bug 18517; bugfix on 0.2.8.1-alpha. Reported by gk, patch by teor.
14578 o Major bugfixes (compilation):
14579 - Repair hardened builds under the clang compiler. Previously, our
14580 use of _FORTIFY_SOURCE would conflict with clang's address
14581 sanitizer. Fixes bug 14821; bugfix on 0.2.5.4-alpha.
14583 o Major bugfixes (crash on shutdown):
14584 - Correctly handle detaching circuits from muxes when shutting down.
14585 Fixes bug 18116; bugfix on 0.2.8.1-alpha.
14586 - Fix an assert-on-exit bug related to counting memory usage in
14587 rephist.c. Fixes bug 18651; bugfix on 0.2.8.1-alpha.
14589 o Major bugfixes (crash on startup):
14590 - Fix a segfault during startup: If a Unix domain socket was
14591 configured as listener (such as a ControlSocket or a SocksPort
14592 "unix:" socket), and tor was started as root but not configured to
14593 switch to another user, tor would segfault while trying to string
14594 compare a NULL value. Fixes bug 18261; bugfix on 0.2.8.1-alpha.
14597 o Major bugfixes (dns proxy mode, crash):
14598 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
14599 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
14601 o Major bugfixes (relays, bridge clients):
14602 - Ensure relays always allow IPv4 OR and Dir connections. Ensure
14603 bridge clients use the address configured in the bridge line.
14604 Fixes bug 18348; bugfix on 0.2.8.1-alpha. Reported by sysrqb,
14607 o Major bugfixes (voting):
14608 - Actually enable support for authorities to match routers by their
14609 Ed25519 identities. Previously, the code had been written, but
14610 some debugging code that had accidentally been left in the
14611 codebase made it stay turned off. Fixes bug 17702; bugfix
14613 - When collating votes by Ed25519 identities, authorities now
14614 include a "NoEdConsensus" flag if the ed25519 value (or lack
14615 thereof) for a server does not reflect the majority consensus.
14616 Related to bug 17668; bugfix on 0.2.7.2-alpha.
14617 - When generating a vote with keypinning disabled, never include two
14618 entries for the same ed25519 identity. This bug was causing
14619 authorities to generate votes that they could not parse when a
14620 router violated key pinning by changing its RSA identity but
14621 keeping its Ed25519 identity. Fixes bug 17668; fixes part of bug
14622 18318. Bugfix on 0.2.7.2-alpha.
14624 o Minor features (security, win32):
14625 - Set SO_EXCLUSIVEADDRUSE on Win32 to avoid a local port-stealing
14626 attack. Fixes bug 18123; bugfix on all tor versions. Patch
14629 o Minor features (bug-resistance):
14630 - Make Tor survive errors involving connections without a
14631 corresponding event object. Previously we'd fail with an
14632 assertion; now we produce a log message. Related to bug 16248.
14634 o Minor features (build):
14635 - Detect systems with FreeBSD-derived kernels (such as GNU/kFreeBSD)
14636 as having possible IPFW support. Closes ticket 18448. Patch from
14637 Steven Chamberlain.
14639 o Minor features (code hardening):
14640 - Use tor_snprintf() and tor_vsnprintf() even in external and low-
14641 level code, to harden against accidental failures to NUL-
14642 terminate. Part of ticket 17852. Patch from jsturgix. Found
14645 o Minor features (crypto):
14646 - Validate the hard-coded Diffie-Hellman parameters and ensure that
14647 p is a safe prime, and g is a suitable generator. Closes
14650 o Minor features (geoip):
14651 - Update geoip and geoip6 to the March 3 2016 Maxmind GeoLite2
14654 o Minor features (hidden service directory):
14655 - Streamline relay-side hsdir handling: when relays consider whether
14656 to accept an uploaded hidden service descriptor, they no longer
14657 check whether they are one of the relays in the network that is
14658 "supposed" to handle that descriptor. Implements ticket 18332.
14660 o Minor features (IPv6):
14661 - Add ClientPreferIPv6DirPort, which is set to 0 by default. If set
14662 to 1, tor prefers IPv6 directory addresses.
14663 - Add ClientUseIPv4, which is set to 1 by default. If set to 0, tor
14664 avoids using IPv4 for client OR and directory connections.
14665 - Try harder to obey the IP version restrictions "ClientUseIPv4 0",
14666 "ClientUseIPv6 0", "ClientPreferIPv6ORPort", and
14667 "ClientPreferIPv6DirPort". Closes ticket 17840; patch by teor.
14669 o Minor features (linux seccomp2 sandbox):
14670 - Reject attempts to change our Address with "Sandbox 1" enabled.
14671 Changing Address with Sandbox turned on would never actually work,
14672 but previously it would fail in strange and confusing ways. Found
14673 while fixing 18548.
14675 o Minor features (robustness):
14676 - Exit immediately with an error message if the code attempts to use
14677 Libevent without having initialized it. This should resolve some
14678 frequently-made mistakes in our unit tests. Closes ticket 18241.
14680 o Minor features (unix domain sockets):
14681 - Add a new per-socket option, RelaxDirModeCheck, to allow creating
14682 Unix domain sockets without checking the permissions on the parent
14683 directory. (Tor checks permissions by default because some
14684 operating systems only check permissions on the parent directory.
14685 However, some operating systems do look at permissions on the
14686 socket, and tor's default check is unneeded.) Closes ticket 18458.
14689 o Minor bugfixes (exit policies, security):
14690 - Refresh an exit relay's exit policy when interface addresses
14691 change. Previously, tor only refreshed the exit policy when the
14692 configured external address changed. Fixes bug 18208; bugfix on
14693 0.2.7.3-rc. Patch by teor.
14695 o Minor bugfixes (security, hidden services):
14696 - Prevent hidden services connecting to client-supplied rendezvous
14697 addresses that are reserved as internal or multicast. Fixes bug
14698 8976; bugfix on 0.2.3.21-rc. Patch by dgoulet and teor.
14700 o Minor bugfixes (build):
14701 - Do not link the unit tests against both the testing and non-
14702 testing versions of the static libraries. Fixes bug 18490; bugfix
14704 - Avoid spurious failures from configure files related to calling
14705 exit(0) in TOR_SEARCH_LIBRARY. Fixes bug 18626; bugfix on
14706 0.2.0.1-alpha. Patch from "cypherpunks".
14707 - Silence spurious clang-scan warnings in the ed25519_donna code by
14708 explicitly initializing some objects. Fixes bug 18384; bugfix on
14709 0.2.7.2-alpha. Patch by teor.
14711 o Minor bugfixes (client, bootstrap):
14712 - Count receipt of new microdescriptors as progress towards
14713 bootstrapping. Previously, with EntryNodes set, Tor might not
14714 successfully repopulate the guard set on bootstrapping. Fixes bug
14715 16825; bugfix on 0.2.3.1-alpha.
14717 o Minor bugfixes (code correctness):
14718 - Update to the latest version of Trunnel, which tries harder to
14719 avoid generating code that can invoke memcpy(p,NULL,0). Bug found
14720 by clang address sanitizer. Fixes bug 18373; bugfix
14723 o Minor bugfixes (configuration):
14724 - Fix a tiny memory leak when parsing a port configuration ending in
14725 ":auto". Fixes bug 18374; bugfix on 0.2.3.3-alpha.
14727 o Minor bugfixes (containers):
14728 - If we somehow attempt to construct a heap with more than
14729 1073741822 elements, avoid an integer overflow when maintaining
14730 the heap property. Fixes bug 18296; bugfix on 0.1.2.1-alpha.
14732 o Minor bugfixes (correctness):
14733 - Fix a bad memory handling bug that would occur if we had queued a
14734 cell on a channel's incoming queue. Fortunately, we can't actually
14735 queue a cell like that as our code is constructed today, but it's
14736 best to avoid this kind of error, even if there isn't any code
14737 that triggers it today. Fixes bug 18570; bugfix on 0.2.4.4-alpha.
14739 o Minor bugfixes (directory):
14740 - When generating a URL for a directory server on an IPv6 address,
14741 wrap the IPv6 address in square brackets. Fixes bug 18051; bugfix
14742 on 0.2.3.9-alpha. Patch from Malek.
14744 o Minor bugfixes (fallback directory mirrors):
14745 - When requesting extrainfo descriptors from a trusted directory
14746 server, check whether it is an authority or a fallback directory
14747 which supports extrainfo descriptors. Fixes bug 18489; bugfix on
14748 0.2.4.7-alpha. Reported by atagar, patch by teor.
14750 o Minor bugfixes (hidden service, client):
14751 - Handle the case where the user makes several fast consecutive
14752 requests to the same .onion address. Previously, the first six
14753 requests would each trigger a descriptor fetch, each picking a
14754 directory (there are 6 overall) and the seventh one would fail
14755 because no directories were left, thereby triggering a close on
14756 all current directory connections asking for the hidden service.
14757 The solution here is to not close the connections if we have
14758 pending directory fetches. Fixes bug 15937; bugfix
14761 o Minor bugfixes (hidden service, control port):
14762 - Add the onion address to the HS_DESC event for the UPLOADED action
14763 both on success or failure. It was previously hardcoded with
14764 UNKNOWN. Fixes bug 16023; bugfix on 0.2.7.2-alpha.
14766 o Minor bugfixes (hidden service, directory):
14767 - Bridges now refuse "rendezvous2" (hidden service descriptor)
14768 publish attempts. Suggested by ticket 18332.
14770 o Minor bugfixes (linux seccomp2 sandbox):
14771 - Allow the setrlimit syscall, and the prlimit and prlimit64
14772 syscalls, which some libc implementations use under the hood.
14773 Fixes bug 15221; bugfix on 0.2.5.1-alpha.
14774 - Avoid a 10-second delay when starting as a client with "Sandbox 1"
14775 enabled and no DNS resolvers configured. This should help TAILS
14776 start up faster. Fixes bug 18548; bugfix on 0.2.5.1-alpha.
14777 - Fix the sandbox's interoperability with unix domain sockets under
14778 setuid. Fixes bug 18253; bugfix on 0.2.8.1-alpha.
14780 o Minor bugfixes (logging):
14781 - When logging information about an unparsable networkstatus vote or
14782 consensus, do not say "vote" when we mean consensus. Fixes bug
14783 18368; bugfix on 0.2.0.8-alpha.
14784 - Scrub service name in "unrecognized service ID" log messages.
14785 Fixes bug 18600; bugfix on 0.2.4.11-alpha.
14786 - Downgrade logs and backtraces about IP versions to info-level.
14787 Only log backtraces once each time tor runs. Assists in diagnosing
14788 bug 18351; bugfix on 0.2.8.1-alpha. Reported by sysrqb and
14789 Christian, patch by teor.
14791 o Minor bugfixes (memory safety):
14792 - Avoid freeing an uninitialized pointer when opening a socket fails
14793 in get_interface_addresses_ioctl(). Fixes bug 18454; bugfix on
14794 0.2.3.11-alpha. Reported by toralf and "cypherpunks", patch
14796 - Correctly duplicate addresses in get_interface_address6_list().
14797 Fixes bug 18454; bugfix on 0.2.8.1-alpha. Reported by toralf,
14798 patch by "cypherpunks".
14799 - Fix a memory leak in tor-gencert. Fixes part of bug 18672; bugfix
14801 - Fix a memory leak in "tor --list-fingerprint". Fixes part of bug
14802 18672; bugfix on 0.2.5.1-alpha.
14804 o Minor bugfixes (private directory):
14805 - Prevent a race condition when creating private directories. Fixes
14806 part of bug 17852; bugfix on 0.0.2pre13. Part of ticket 17852.
14807 Patch from jsturgix. Found with Flawfinder.
14809 o Minor bugfixes (test networks, IPv6):
14810 - Allow internal IPv6 addresses in descriptors in test networks.
14811 Fixes bug 17153; bugfix on 0.2.3.16-alpha. Patch by teor, reported
14814 o Minor bugfixes (testing):
14815 - We no longer disable assertions in the unit tests when coverage is
14816 enabled. Instead, we require you to say --disable-asserts-in-tests
14817 to the configure script if you need assertions disabled in the
14818 unit tests (for example, if you want to perform branch coverage).
14819 Fixes bug 18242; bugfix on 0.2.7.1-alpha.
14821 o Minor bugfixes (time parsing):
14822 - Avoid overflow in tor_timegm when parsing dates in and after 2038
14823 on platforms with 32-bit time_t. Fixes bug 18479; bugfix on
14824 0.0.2pre14. Patch by teor.
14826 o Minor bugfixes (tor-gencert):
14827 - Correctly handle the case where an authority operator enters a
14828 passphrase but sends an EOF before sending a newline. Fixes bug
14829 17443; bugfix on 0.2.0.20-rc. Found by junglefowl.
14831 o Code simplification and refactoring:
14832 - Quote all the string interpolations in configure.ac -- even those
14833 which we are pretty sure can't contain spaces. Closes ticket
14834 17744. Patch from zerosion.
14835 - Remove specialized code for non-inplace AES_CTR. 99% of our AES is
14836 inplace, so there's no need to have a separate implementation for
14837 the non-inplace code. Closes ticket 18258. Patch from Malek.
14838 - Simplify return types for some crypto functions that can't
14839 actually fail. Patch from Hassan Alsibyani. Closes ticket 18259.
14842 - Change build messages to refer to "Fedora" instead of "Fedora
14843 Core", and "dnf" instead of "yum". Closes tickets 18459 and 18426.
14844 Patches from "icanhasaccount" and "cypherpunks".
14846 o Removed features:
14847 - We no longer maintain an internal freelist in memarea.c.
14848 Allocators should be good enough to make this code unnecessary,
14849 and it's doubtful that it ever had any performance benefit.
14852 - Fix several warnings from clang's address sanitizer produced in
14854 - Treat backtrace test failures as expected on FreeBSD until we
14855 solve bug 17808. Closes ticket 18204.
14858 Changes in version 0.2.8.1-alpha - 2016-02-04
14859 Tor 0.2.8.1-alpha is the first alpha release in its series. It
14860 includes numerous small features and bugfixes against previous Tor
14861 versions, and numerous small infrastructure improvements. The most
14862 notable features are a set of improvements to the directory subsystem.
14864 o Major features (security, Linux):
14865 - When Tor starts as root on Linux and is told to switch user ID, it
14866 can now retain the capability to bind to low ports. By default,
14867 Tor will do this only when it's switching user ID and some low
14868 ports have been configured. You can change this behavior with the
14869 new option KeepBindCapabilities. Closes ticket 8195.
14871 o Major features (directory system):
14872 - When bootstrapping multiple consensus downloads at a time, use the
14873 first one that starts downloading, and close the rest. This
14874 reduces failures when authorities or fallback directories are slow
14875 or down. Together with the code for feature 15775, this feature
14876 should reduces failures due to fallback churn. Implements ticket
14877 4483. Patch by "teor". Implements IPv4 portions of proposal 210 by
14878 "mikeperry" and "teor".
14879 - Include a trial list of 21 default fallback directories, generated
14880 in January 2016, based on an opt-in survey of suitable relays.
14881 Doing this should make clients bootstrap more quickly and reliably,
14882 and reduce the load on the directory authorities. Closes ticket
14883 15775. Patch by "teor".
14884 Candidates identified using an OnionOO script by "weasel", "teor",
14885 "gsathya", and "karsten".
14886 - Previously only relays that explicitly opened a directory port
14887 (DirPort) accepted directory requests from clients. Now all
14888 relays, with and without a DirPort, accept and serve tunneled
14889 directory requests that they receive through their ORPort. You can
14890 disable this behavior using the new DirCache option. Closes
14893 o Major key updates:
14894 - Update the V3 identity key for the dannenberg directory authority:
14895 it was changed on 18 November 2015. Closes task 17906. Patch
14898 o Minor features (security, clock):
14899 - Warn when the system clock appears to move back in time (when the
14900 state file was last written in the future). Tor doesn't know that
14901 consensuses have expired if the clock is in the past. Patch by
14902 "teor". Implements ticket 17188.
14904 o Minor features (security, exit policies):
14905 - ExitPolicyRejectPrivate now rejects more private addresses by
14906 default. Specifically, it now rejects the relay's outbound bind
14907 addresses (if configured), and the relay's configured port
14908 addresses (such as ORPort and DirPort). Fixes bug 17027; bugfix on
14909 0.2.0.11-alpha. Patch by "teor".
14911 o Minor features (security, memory erasure):
14912 - Set the unused entries in a smartlist to NULL. This helped catch
14913 a (harmless) bug, and shouldn't affect performance too much.
14914 Implements ticket 17026.
14915 - Use SecureMemoryWipe() function to securely clean memory on
14916 Windows. Previously we'd use OpenSSL's OPENSSL_cleanse() function.
14917 Implements feature 17986.
14918 - Use explicit_bzero or memset_s when present. Previously, we'd use
14919 OpenSSL's OPENSSL_cleanse() function. Closes ticket 7419; patches
14920 from <logan@hackers.mu> and <selven@hackers.mu>.
14921 - Make memwipe() do nothing when passed a NULL pointer or buffer of
14922 zero size. Check size argument to memwipe() for underflow. Fixes
14923 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
14926 o Minor features (security, RNG):
14927 - Adjust Tor's use of OpenSSL's RNG APIs so that they absolutely,
14928 positively are not allowed to fail. Previously we depended on
14929 internal details of OpenSSL's behavior. Closes ticket 17686.
14930 - Never use the system entropy output directly for anything besides
14931 seeding the PRNG. When we want to generate important keys, instead
14932 of using system entropy directly, we now hash it with the PRNG
14933 stream. This may help resist certain attacks based on broken OS
14934 entropy implementations. Closes part of ticket 17694.
14935 - Use modern system calls (like getentropy() or getrandom()) to
14936 generate strong entropy on platforms that have them. Closes
14939 o Minor features (accounting):
14940 - Added two modes to the AccountingRule option: One for limiting
14941 only the number of bytes sent ("AccountingRule out"), and one for
14942 limiting only the number of bytes received ("AccountingRule in").
14943 Closes ticket 15989; patch from "unixninja92".
14945 o Minor features (build):
14946 - Since our build process now uses "make distcheck", we no longer
14947 force "make dist" to depend on "make check". Closes ticket 17893;
14948 patch from "cypherpunks."
14949 - Tor now builds successfully with the recent OpenSSL 1.1
14950 development branch, and with the latest LibreSSL. Closes tickets
14951 17549, 17921, and 17984.
14953 o Minor features (controller):
14954 - Adds the FallbackDir entries to 'GETINFO config/defaults'. Closes
14955 tickets 16774 and 17817. Patch by George Tankersley.
14956 - New 'GETINFO hs/service/desc/id/' command to retrieve a hidden
14957 service descriptor from a service's local hidden service
14958 descriptor cache. Closes ticket 14846.
14959 - Add 'GETINFO exit-policy/reject-private/[default,relay]', so
14960 controllers can examine the the reject rules added by
14961 ExitPolicyRejectPrivate. This makes it easier for stem to display
14964 o Minor features (crypto):
14965 - Add SHA512 support to crypto.c. Closes ticket 17663; patch from
14967 - Add SHA3 and SHAKE support to crypto.c. Closes ticket 17783.
14968 - When allocating a digest state object, allocate no more space than
14969 we actually need. Previously, we would allocate as much space as
14970 the state for the largest algorithm would need. This change saves
14971 up to 672 bytes per circuit. Closes ticket 17796.
14972 - Improve performance when hashing non-multiple of 8 sized buffers,
14973 based on Andrew Moon's public domain SipHash-2-4 implementation.
14974 Fixes bug 17544; bugfix on 0.2.5.3-alpha.
14976 o Minor features (directory downloads):
14977 - Wait for busy authorities and fallback directories to become non-
14978 busy when bootstrapping. (A similar change was made in 6c443e987d
14979 for directory caches chosen from the consensus.) Closes ticket
14980 17864; patch by "teor".
14981 - Add UseDefaultFallbackDirs, which enables any hard-coded fallback
14982 directory mirrors. The default is 1; set it to 0 to disable
14983 fallbacks. Implements ticket 17576. Patch by "teor".
14985 o Minor features (geoip):
14986 - Update geoip and geoip6 to the January 5 2016 Maxmind GeoLite2
14989 o Minor features (IPv6):
14990 - Add an argument 'ipv6=address:orport' to the DirAuthority and
14991 FallbackDir torrc options, to specify an IPv6 address for an
14992 authority or fallback directory. Add hard-coded ipv6 addresses for
14993 directory authorities that have them. Closes ticket 17327; patch
14994 from Nick Mathewson and "teor".
14995 - Add address policy assume_action support for IPv6 addresses.
14996 - Limit IPv6 mask bits to 128.
14997 - Warn when comparing against an AF_UNSPEC address in a policy, it's
14998 almost always a bug. Closes ticket 17863; patch by "teor".
14999 - Allow users to configure directory authorities and fallback
15000 directory servers with IPv6 addresses and ORPorts. Resolves
15002 - routerset_parse now accepts IPv6 literal addresses. Fixes bug
15003 17060; bugfix on 0.2.1.3-alpha. Patch by "teor".
15004 - Make tor_ersatz_socketpair work on IPv6-only systems. Fixes bug
15005 17638; bugfix on 0.0.2pre8. Patch by "teor".
15007 o Minor features (logging):
15008 - When logging to syslog, allow a tag to be added to the syslog
15009 identity (the string prepended to every log message). The tag can
15010 be configured with SyslogIdentityTag and defaults to none. Setting
15011 it to "foo" will cause logs to be tagged as "Tor-foo". Closes
15014 o Minor features (portability):
15015 - Use timingsafe_memcmp() where available. Closes ticket 17944;
15016 patch from <logan@hackers.mu>.
15018 o Minor features (relay, address discovery):
15019 - Add a family argument to get_interface_addresses_raw() and
15020 subfunctions to make network interface address interogation more
15021 efficient. Now Tor can specifically ask for IPv4, IPv6 or both
15022 types of interfaces from the operating system. Resolves
15024 - When get_interface_address6_list(.,AF_UNSPEC,.) is called and
15025 fails to enumerate interface addresses using the platform-specific
15026 API, have it rely on the UDP socket fallback technique to try and
15027 find out what IP addresses (both IPv4 and IPv6) our machine has.
15028 Resolves ticket 17951.
15030 o Minor features (replay cache):
15031 - The replay cache now uses SHA256 instead of SHA1. Implements
15032 feature 8961. Patch by "teor", issue reported by "rransom".
15034 o Minor features (unix file permissions):
15035 - Defer creation of Unix sockets until after setuid. This avoids
15036 needing CAP_CHOWN and CAP_FOWNER when using systemd's
15037 CapabilityBoundingSet, or chown and fowner when using SELinux.
15038 Implements part of ticket 17562. Patch from Jamie Nguyen.
15039 - If any directory created by Tor is marked as group readable, the
15040 filesystem group is allowed to be either the default GID or the
15041 root user. Allowing root to read the DataDirectory prevents the
15042 need for CAP_READ_SEARCH when using systemd's
15043 CapabilityBoundingSet, or dac_read_search when using SELinux.
15044 Implements part of ticket 17562. Patch from Jamie Nguyen.
15045 - Introduce a new DataDirectoryGroupReadable option. If it is set to
15046 1, the DataDirectory will be made readable by the default GID.
15047 Implements part of ticket 17562. Patch from Jamie Nguyen.
15049 o Minor bugfixes (accounting):
15050 - The max bandwidth when using 'AccountRule sum' is now correctly
15051 logged. Fixes bug 18024; bugfix on 0.2.6.1-alpha. Patch
15052 from "unixninja92".
15054 o Minor bugfixes (code correctness):
15055 - When closing an entry connection, generate a warning if we should
15056 have sent an end cell for it but we haven't. Fixes bug 17876;
15057 bugfix on 0.2.3.2-alpha.
15058 - Assert that allocated memory held by the reputation code is freed
15059 according to its internal counters. Fixes bug 17753; bugfix
15061 - Assert when the TLS contexts fail to initialize. Fixes bug 17683;
15064 o Minor bugfixes (compilation):
15065 - Mark all object files that include micro-revision.i as depending
15066 on it, so as to make parallel builds more reliable. Fixes bug
15067 17826; bugfix on 0.2.5.1-alpha.
15068 - Don't try to use the pthread_condattr_setclock() function unless
15069 it actually exists. Fixes compilation on NetBSD-6.x. Fixes bug
15070 17819; bugfix on 0.2.6.3-alpha.
15071 - Fix backtrace compilation on FreeBSD. Fixes bug 17827; bugfix
15073 - Fix compilation of sandbox.c with musl-libc. Fixes bug 17347;
15074 bugfix on 0.2.5.1-alpha. Patch from 'jamestk'.
15075 - Fix search for libevent libraries on OpenBSD (and other systems
15076 that install libevent 1 and libevent 2 in parallel). Fixes bug
15077 16651; bugfix on 0.1.0.7-rc. Patch from "rubiate".
15078 - Isolate environment variables meant for tests from the rest of the
15079 build system. Fixes bug 17818; bugfix on 0.2.7.3-rc.
15080 - Replace usage of 'INLINE' with 'inline'. Fixes bug 17804; bugfix
15082 - Remove config.log only from make distclean, not from make clean.
15083 Fixes bug 17924; bugfix on 0.2.4.1-alpha.
15085 o Minor bugfixes (crypto):
15086 - Check the return value of HMAC() and assert on failure. Fixes bug
15087 17658; bugfix on 0.2.3.6-alpha. Patch by "teor".
15089 o Minor bugfixes (fallback directories):
15090 - Mark fallbacks as "too busy" when they return a 503 response,
15091 rather than just marking authorities. Fixes bug 17572; bugfix on
15092 0.2.4.7-alpha. Patch by "teor".
15094 o Minor bugfixes (IPv6):
15095 - Update the limits in max_dl_per_request for IPv6 address length.
15096 Fixes bug 17573; bugfix on 0.2.1.5-alpha.
15098 o Minor bugfixes (linux seccomp2 sandbox):
15099 - Fix a crash when using offline master ed25519 keys with the Linux
15100 seccomp2 sandbox enabled. Fixes bug 17675; bugfix on 0.2.7.3-rc.
15102 o Minor bugfixes (logging):
15103 - In log messages that include a function name, use __FUNCTION__
15104 instead of __PRETTY_FUNCTION__. In GCC, these are synonymous, but
15105 with clang __PRETTY_FUNCTION__ has extra information we don't
15106 need. Fixes bug 16563; bugfix on 0.0.2pre8. Fix by Tom van
15108 - Remove needless quotes from a log message about unparseable
15109 addresses. Fixes bug 17843; bugfix on 0.2.3.3-alpha.
15111 o Minor bugfixes (portability):
15112 - Remove an #endif from configure.ac so that we correctly detect the
15113 presence of in6_addr.s6_addr32. Fixes bug 17923; bugfix
15116 o Minor bugfixes (relays):
15117 - Check that both the ORPort and DirPort (if present) are reachable
15118 before publishing a relay descriptor. Otherwise, relays publish a
15119 descriptor with DirPort 0 when the DirPort reachability test takes
15120 longer than the ORPort reachability test. Fixes bug 18050; bugfix
15121 on 0.1.0.1-rc. Reported by "starlight", patch by "teor".
15123 o Minor bugfixes (relays, hidden services):
15124 - Refuse connection requests to private OR addresses unless
15125 ExtendAllowPrivateAddresses is set. Previously, tor would connect,
15126 then refuse to send any cells to a private address. Fixes bugs
15127 17674 and 8976; bugfix on 0.2.3.21-rc. Patch by "teor".
15129 o Minor bugfixes (safe logging):
15130 - When logging a malformed hostname received through socks4, scrub
15131 it if SafeLogging says we should. Fixes bug 17419; bugfix
15134 o Minor bugfixes (statistics code):
15135 - Consistently check for overflow in round_*_to_next_multiple_of
15136 functions, and add unit tests with additional and maximal values.
15137 Fixes part of bug 13192; bugfix on 0.2.2.1-alpha.
15138 - Handle edge cases in the laplace functions: avoid division by
15139 zero, avoid taking the log of zero, and silence clang type
15140 conversion warnings using round and trunc. Add unit tests for edge
15141 cases with maximal values. Fixes part of bug 13192; bugfix
15144 o Minor bugfixes (testing):
15145 - The test for log_heartbeat was incorrectly failing in timezones
15146 with non-integer offsets. Instead of comparing the end of the time
15147 string against a constant, compare it to the output of
15148 format_local_iso_time when given the correct input. Fixes bug
15149 18039; bugfix on 0.2.5.4-alpha.
15150 - Make unit tests pass on IPv6-only systems, and systems without
15151 localhost addresses (like some FreeBSD jails). Fixes bug 17632;
15152 bugfix on 0.2.7.3-rc. Patch by "teor".
15153 - Fix a memory leak in the ntor test. Fixes bug 17778; bugfix
15155 - Check the full results of SHA256 and SHA512 digests in the unit
15156 tests. Bugfix on 0.2.2.4-alpha. Patch by "teor".
15158 o Code simplification and refactoring:
15159 - Move logging of redundant policy entries in
15160 policies_parse_exit_policy_internal into its own function. Closes
15161 ticket 17608; patch from "juce".
15162 - Extract the more complicated parts of circuit_mark_for_close()
15163 into a new function that we run periodically before circuits are
15164 freed. This change removes more than half of the functions
15165 currently in the "blob". Closes ticket 17218.
15166 - Clean up a little duplicated code in
15167 crypto_expand_key_material_TAP(). Closes ticket 17587; patch
15169 - Decouple the list of streams waiting to be attached to circuits
15170 from the overall connection list. This change makes it possible to
15171 attach streams quickly while simplifying Tor's callgraph and
15172 avoiding O(N) scans of the entire connection list. Closes
15174 - When a direct directory request fails immediately on launch,
15175 instead of relaunching that request from inside the code that
15176 launches it, instead mark the connection for teardown. This change
15177 simplifies Tor's callback and prevents the directory-request
15178 launching code from invoking itself recursively. Closes
15180 - Remove code for configuring OpenSSL dynamic locks; OpenSSL doesn't
15181 use them. Closes ticket 17926.
15184 - Add a description of the correct use of the '--keygen' command-
15185 line option. Closes ticket 17583; based on text by 's7r'.
15186 - Document the minimum HeartbeatPeriod value. Closes ticket 15638.
15187 - Explain actual minima for BandwidthRate. Closes ticket 16382.
15188 - Fix a minor formatting typo in the manpage. Closes ticket 17791.
15189 - Mention torspec URL in the manpage and point the reader to it
15190 whenever we mention a document that belongs in torspce. Fixes
15193 o Removed features:
15194 - Remove client-side support for connecting to Tor relays running
15195 versions of Tor before 0.2.3.6-alpha. These relays didn't support
15196 the v3 TLS handshake protocol, and are no longer allowed on the
15197 Tor network. Implements the client side of ticket 11150. Based on
15198 patches by Tom van der Woerdt.
15201 - Add unit tests to check for common RNG failure modes, such as
15202 returning all zeroes, identical values, or incrementing values
15203 (OpenSSL's rand_predictable feature). Patch by "teor".
15204 - Log more information when the backtrace tests fail. Closes ticket
15205 17892. Patch from "cypherpunks."
15206 - Always test both ed25519 backends, so that we can be sure that our
15207 batch-open replacement code works. Part of ticket 16794.
15208 - Cover dns_resolve_impl() in dns.c with unit tests. Implements a
15209 portion of ticket 16831.
15210 - More unit tests for compat_libevent.c, procmon.c, tortls.c,
15211 util_format.c, directory.c, and options_validate.c. Closes tickets
15212 17075, 17082, 17084, 17003, and 17076 respectively. Patches from
15214 - Unit tests for directory_handle_command_get. Closes ticket 17004.
15215 Patch from Reinaldo de Souza Jr.
15218 Changes in version 0.2.7.6 - 2015-12-10
15219 Tor version 0.2.7.6 fixes a major bug in entry guard selection, as
15220 well as a minor bug in hidden service reliability.
15222 o Major bugfixes (guard selection):
15223 - Actually look at the Guard flag when selecting a new directory
15224 guard. When we implemented the directory guard design, we
15225 accidentally started treating all relays as if they have the Guard
15226 flag during guard selection, leading to weaker anonymity and worse
15227 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
15230 o Minor features (geoip):
15231 - Update geoip and geoip6 to the December 1 2015 Maxmind GeoLite2
15234 o Minor bugfixes (compilation):
15235 - When checking for net/pfvar.h, include netinet/in.h if possible.
15236 This fixes transparent proxy detection on OpenBSD. Fixes bug
15237 17551; bugfix on 0.1.2.1-alpha. Patch from "rubiate".
15238 - Fix a compilation warning with Clang 3.6: Do not check the
15239 presence of an address which can never be NULL. Fixes bug 17781.
15241 o Minor bugfixes (correctness):
15242 - When displaying an IPv6 exit policy, include the mask bits
15243 correctly even when the number is greater than 31. Fixes bug
15244 16056; bugfix on 0.2.4.7-alpha. Patch from "gturner".
15245 - The wrong list was used when looking up expired intro points in a
15246 rend service object, causing what we think could be reachability
15247 issues for hidden services, and triggering a BUG log. Fixes bug
15248 16702; bugfix on 0.2.7.2-alpha.
15249 - Fix undefined behavior in the tor_cert_checksig function. Fixes
15250 bug 17722; bugfix on 0.2.7.2-alpha.
15253 Changes in version 0.2.7.5 - 2015-11-20
15254 The Tor 0.2.7 release series is dedicated to the memory of Tor user
15255 and privacy advocate Caspar Bowden (1961-2015). Caspar worked
15256 tirelessly to advocate human rights regardless of national borders,
15257 and oppose the encroachments of mass surveillance. He opposed national
15258 exceptionalism, he brought clarity to legal and policy debates, he
15259 understood and predicted the impact of mass surveillance on the world,
15260 and he laid the groundwork for resisting it. While serving on the Tor
15261 Project's board of directors, he brought us his uncompromising focus
15262 on technical excellence in the service of humankind. Caspar was an
15263 inimitable force for good and a wonderful friend. He was kind,
15264 humorous, generous, gallant, and believed we should protect one
15265 another without exception. We honor him here for his ideals, his
15266 efforts, and his accomplishments. Please honor his memory with works
15267 that would make him proud.
15269 Tor 0.2.7.5 is the first stable release in the Tor 0.2.7 series.
15271 The 0.2.7 series adds a more secure identity key type for relays,
15272 improves cryptography performance, resolves several longstanding
15273 hidden-service performance issues, improves controller support for
15274 hidden services, and includes small bugfixes and performance
15275 improvements throughout the program. This release series also includes
15276 more tests than before, and significant simplifications to which parts
15277 of Tor invoke which others.
15279 (This release contains no code changes since 0.2.7.4-rc.)
15282 Changes in version 0.2.7.4-rc - 2015-10-21
15283 Tor 0.2.7.4-rc is the second release candidate in the 0.2.7 series. It
15284 fixes some important memory leaks, and a scary-looking (but mostly
15285 harmless in practice) invalid-read bug. It also has a few small
15286 bugfixes, notably fixes for compilation and portability on different
15287 platforms. If no further significant bounds are found, the next
15288 release will the the official stable release.
15290 o Major bugfixes (security, correctness):
15291 - Fix an error that could cause us to read 4 bytes before the
15292 beginning of an openssl string. This bug could be used to cause
15293 Tor to crash on systems with unusual malloc implementations, or
15294 systems with unusual hardening installed. Fixes bug 17404; bugfix
15297 o Major bugfixes (correctness):
15298 - Fix a use-after-free bug in validate_intro_point_failure(). Fixes
15299 bug 17401; bugfix on 0.2.7.3-rc.
15301 o Major bugfixes (memory leaks):
15302 - Fix a memory leak in ed25519 batch signature checking. Fixes bug
15303 17398; bugfix on 0.2.6.1-alpha.
15304 - Fix a memory leak in rend_cache_failure_entry_free(). Fixes bug
15305 17402; bugfix on 0.2.7.3-rc.
15306 - Fix a memory leak when reading an expired signing key from disk.
15307 Fixes bug 17403; bugfix on 0.2.7.2-rc.
15309 o Minor features (geoIP):
15310 - Update geoip and geoip6 to the October 9 2015 Maxmind GeoLite2
15313 o Minor bugfixes (compilation):
15314 - Repair compilation with the most recent (unreleased, alpha)
15315 vesions of OpenSSL 1.1. Fixes part of ticket 17237.
15316 - Fix an integer overflow warning in test_crypto_slow.c. Fixes bug
15317 17251; bugfix on 0.2.7.2-alpha.
15318 - Fix compilation of sandbox.c with musl-libc. Fixes bug 17347;
15319 bugfix on 0.2.5.1-alpha. Patch from 'jamestk'.
15321 o Minor bugfixes (portability):
15322 - Use libexecinfo on FreeBSD to enable backtrace support. Fixes
15323 part of bug 17151; bugfix on 0.2.5.2-alpha. Patch from
15326 o Minor bugfixes (sandbox):
15327 - Add the "hidserv-stats" filename to our sandbox filter for the
15328 HiddenServiceStatistics option to work properly. Fixes bug 17354;
15329 bugfix on 0.2.6.2-alpha. Patch from David Goulet.
15331 o Minor bugfixes (testing):
15332 - Add unit tests for get_interface_address* failure cases. Fixes bug
15333 17173; bugfix on 0.2.7.3-rc. Patch by fk/teor.
15334 - Fix breakage when running 'make check' with BSD make. Fixes bug
15335 17154; bugfix on 0.2.7.3-rc. Patch by Marcin Cieślak.
15336 - Make the get_ifaddrs_* unit tests more tolerant of different
15337 network configurations. (Don't assume every test box has an IPv4
15338 address, and don't assume every test box has a non-localhost
15339 address.) Fixes bug 17255; bugfix on 0.2.7.3-rc. Patch by "teor".
15340 - Skip backtrace tests when backtrace support is not compiled in.
15341 Fixes part of bug 17151; bugfix on 0.2.7.1-alpha. Patch from
15345 - Fix capitalization of SOCKS in sample torrc. Closes ticket 15609.
15346 - Note that HiddenServicePorts can take a unix domain socket. Closes
15350 Changes in version 0.2.7.3-rc - 2015-09-25
15351 Tor 0.2.7.3-rc is the first release candidate in the 0.2.7 series. It
15352 contains numerous usability fixes for Ed25519 keys, safeguards against
15353 several misconfiguration problems, significant simplifications to
15354 Tor's callgraph, and numerous bugfixes and small features.
15356 This is the most tested release of Tor to date. The unit tests cover
15357 39.40% of the code, and the integration tests (accessible with "make
15358 test-full-online", requiring stem and chutney and a network
15359 connection) raise the coverage to 64.49%.
15361 o Major features (security, hidden services):
15362 - Hidden services, if using the EntryNodes option, are required to
15363 use more than one EntryNode, in order to avoid a guard discovery
15364 attack. (This would only affect people who had configured hidden
15365 services and manually specified the EntryNodes option with a
15366 single entry-node. The impact was that it would be easy to
15367 remotely identify the guard node used by such a hidden service.
15368 See ticket for more information.) Fixes ticket 14917.
15370 o Major features (Ed25519 keys, keypinning):
15371 - The key-pinning option on directory authorities is now advisory-
15372 only by default. In a future version, or when the AuthDirPinKeys
15373 option is set, pins are enforced again. Disabling key-pinning
15374 seemed like a good idea so that we can survive the fallout of any
15375 usability problems associated with Ed25519 keys. Closes
15378 o Major features (Ed25519 performance):
15379 - Improve the speed of Ed25519 operations and Curve25519 keypair
15380 generation when built targeting 32 bit x86 platforms with SSE2
15381 available. Implements ticket 16535.
15382 - Improve the runtime speed of Ed25519 signature verification by
15383 using Ed25519-donna's batch verification support. Implements
15386 o Major features (performance testing):
15387 - The test-network.sh script now supports performance testing.
15388 Requires corresponding chutney performance testing changes. Patch
15389 by "teor". Closes ticket 14175.
15391 o Major features (relay, Ed25519):
15392 - Significant usability improvements for Ed25519 key management. Log
15393 messages are better, and the code can recover from far more
15394 failure conditions. Thanks to "s7r" for reporting and diagnosing
15396 - Add a new OfflineMasterKey option to tell Tor never to try loading
15397 or generating a secret Ed25519 identity key. You can use this in
15398 combination with tor --keygen to manage offline and/or encrypted
15399 Ed25519 keys. Implements ticket 16944.
15400 - Add a --newpass option to allow changing or removing the
15401 passphrase of an encrypted key with tor --keygen. Implements part
15403 - On receiving a HUP signal, check to see whether the Ed25519
15404 signing key has changed, and reload it if so. Closes ticket 16790.
15406 o Major bugfixes (relay, Ed25519):
15407 - Avoid crashing on 'tor --keygen'. Fixes bug 16679; bugfix on
15408 0.2.7.2-alpha. Reported by "s7r".
15409 - Improve handling of expired signing keys with offline master keys.
15410 Fixes bug 16685; bugfix on 0.2.7.2-alpha. Reported by "s7r".
15412 o Minor features (client-side privacy):
15413 - New KeepAliveIsolateSOCKSAuth option to indefinitely extend circuit
15414 lifespan when IsolateSOCKSAuth and streams with SOCKS
15415 authentication are attached to the circuit. This allows
15416 applications like TorBrowser to manage circuit lifetime on their
15417 own. Implements feature 15482.
15418 - When logging malformed hostnames from SOCKS5 requests, respect
15419 SafeLogging configuration. Fixes bug 16891; bugfix on 0.1.1.16-rc.
15421 o Minor features (compilation):
15422 - Give a warning as early as possible when trying to build with an
15423 unsupported OpenSSL version. Closes ticket 16901.
15424 - Fail during configure if we're trying to build against an OpenSSL
15425 built without ECC support. Fixes bug 17109, bugfix on 0.2.7.1-alpha
15426 which started requiring ECC.
15428 o Minor features (geoip):
15429 - Update geoip and geoip6 to the September 3 2015 Maxmind GeoLite2
15432 o Minor features (hidden services):
15433 - Relays need to have the Fast flag to get the HSDir flag. As this
15434 is being written, we'll go from 2745 HSDirs down to 2342, a ~14%
15435 drop. This change should make some attacks against the hidden
15436 service directory system harder. Fixes ticket 15963.
15437 - Turn on hidden service statistics collection by setting the torrc
15438 option HiddenServiceStatistics to "1" by default. (This keeps
15439 track only of the fraction of traffic used by hidden services, and
15440 the total number of hidden services in existence.) Closes
15442 - Client now uses an introduction point failure cache to know when
15443 to fetch or keep a descriptor in their cache. Previously, failures
15444 were recorded implicitly, but not explicitly remembered. Closes
15447 o Minor features (testing, authorities, documentation):
15448 - New TestingDirAuthVote{Exit,Guard,HSDir}IsStrict flags to
15449 explicitly manage consensus flags in testing networks. Patch by
15450 "robgjansen", modified by "teor". Implements part of ticket 14882.
15452 o Minor bugfixes (security, exit policies):
15453 - ExitPolicyRejectPrivate now also rejects the relay's published
15454 IPv6 address (if any), and any publicly routable IPv4 or IPv6
15455 addresses on any local interfaces. ticket 17027. Patch by "teor".
15456 Fixes bug 17027; bugfix on 0.2.0.11-alpha.
15458 o Minor bug fixes (torrc exit policies):
15459 - In torrc, "accept6 *" and "reject6 *" ExitPolicy lines now only
15460 produce IPv6 wildcard addresses. Previously they would produce
15461 both IPv4 and IPv6 wildcard addresses. Patch by "teor". Fixes part
15462 of bug 16069; bugfix on 0.2.4.7-alpha.
15463 - When parsing torrc ExitPolicies, we now warn for a number of cases
15464 where the user's intent is likely to differ from Tor's actual
15465 behavior. These include: using an IPv4 address with an accept6 or
15466 reject6 line; using "private" on an accept6 or reject6 line; and
15467 including any ExitPolicy lines after accept *:* or reject *:*.
15468 Related to ticket 16069.
15469 - When parsing torrc ExitPolicies, we now issue an info-level
15470 message when expanding an "accept/reject *" line to include both
15471 IPv4 and IPv6 wildcard addresses. Related to ticket 16069.
15472 - In each instance above, usage advice is provided to avoid the
15473 message. Resolves ticket 16069. Patch by "teor". Fixes part of bug
15474 16069; bugfix on 0.2.4.7-alpha.
15476 o Minor bugfixes (authority):
15477 - Don't assign "HSDir" to a router if it isn't Valid and Running.
15478 Fixes bug 16524; bugfix on 0.2.7.2-alpha.
15479 - Downgrade log messages about Ed25519 key issues if they are in old
15480 cached router descriptors. Fixes part of bug 16286; bugfix
15482 - When we find an Ed25519 key issue in a cached descriptor, stop
15483 saying the descriptor was just "uploaded". Fixes another part of
15484 bug 16286; bugfix on 0.2.7.2-alpha.
15486 o Minor bugfixes (control port):
15487 - Repair a warning and a spurious result when getting the maximum
15488 number of file descriptors from the controller. Fixes bug 16697;
15489 bugfix on 0.2.7.2-alpha.
15491 o Minor bugfixes (correctness):
15492 - When calling channel_free_list(), avoid calling smartlist_remove()
15493 while inside a FOREACH loop. This partially reverts commit
15494 17356fe7fd96af where the correct SMARTLIST_DEL_CURRENT was
15495 incorrectly removed. Fixes bug 16924; bugfix on 0.2.4.4-alpha.
15497 o Minor bugfixes (documentation):
15498 - Advise users on how to configure separate IPv4 and IPv6 exit
15499 policies in the manpage and sample torrcs. Related to ticket 16069.
15500 - Fix the usage message of tor-resolve(1) so that it no longer lists
15501 the removed -F option. Fixes bug 16913; bugfix on 0.2.2.28-beta.
15502 - Fix an error in the manual page and comments for
15503 TestingDirAuthVoteHSDir[IsStrict], which suggested that a HSDir
15504 required "ORPort connectivity". While this is true, it is in no
15505 way unique to the HSDir flag. Of all the flags, only HSDirs need a
15506 DirPort configured in order for the authorities to assign that
15507 particular flag. Patch by "teor". Fixed as part of 14882; bugfix
15510 o Minor bugfixes (Ed25519):
15511 - Fix a memory leak when reading router descriptors with expired
15512 Ed25519 certificates. Fixes bug 16539; bugfix on 0.2.7.2-alpha.
15514 o Minor bugfixes (linux seccomp2 sandbox):
15515 - Allow bridge authorities to run correctly under the seccomp2
15516 sandbox. Fixes bug 16964; bugfix on 0.2.5.1-alpha.
15517 - Allow routers with ed25519 keys to run correctly under the
15518 seccomp2 sandbox. Fixes bug 16965; bugfix on 0.2.7.2-alpha.
15520 o Minor bugfixes (open file limit):
15521 - Fix set_max_file_descriptors() to set by default the max open file
15522 limit to the current limit when setrlimit() fails. Fixes bug
15523 16274; bugfix on 0.2.0.10-alpha. Patch by dgoulet.
15525 o Minor bugfixes (portability):
15526 - Try harder to normalize the exit status of the Tor process to the
15527 standard-provided range. Fixes bug 16975; bugfix on every version
15529 - Check correctly for Windows socket errors in the workqueue
15530 backend. Fixes bug 16741; bugfix on 0.2.6.3-alpha.
15531 - Fix the behavior of crypto_rand_time_range() when told to consider
15532 times before 1970. (These times were possible when running in a
15533 simulated network environment where time()'s output starts at
15534 zero.) Fixes bug 16980; bugfix on 0.2.7.1-alpha.
15535 - Restore correct operation of TLS client-cipher detection on
15536 OpenSSL 1.1. Fixes bug 14047; bugfix on 0.2.7.2-alpha.
15538 o Minor bugfixes (relay):
15539 - Ensure that worker threads actually exit when a fatal error or
15540 shutdown is indicated. This fix doesn't currently affect the
15541 behavior of Tor, because Tor workers never indicates fatal error
15542 or shutdown except in the unit tests. Fixes bug 16868; bugfix
15544 - Unblock threads before releasing the work queue mutex to ensure
15545 predictable scheduling behavior. Fixes bug 16644; bugfix
15548 o Code simplification and refactoring:
15549 - Change the function that's called when we need to retry all
15550 downloads so that it only reschedules the downloads to happen
15551 immediately, rather than launching them all at once itself. This
15552 further simplifies Tor's callgraph.
15553 - Move some format-parsing functions out of crypto.c and
15554 crypto_curve25519.c into crypto_format.c and/or util_format.c.
15555 - Move the client-only parts of init_keys() into a separate
15556 function. Closes ticket 16763.
15557 - Simplify the microdesc_free() implementation so that it no longer
15558 appears (to code analysis tools) to potentially invoke a huge
15559 suite of other microdesc functions.
15560 - Simply the control graph further by deferring the inner body of
15561 directory_all_unreachable() into a callback. Closes ticket 16762.
15562 - Treat the loss of an owning controller as equivalent to a SIGTERM
15563 signal. This removes a tiny amount of duplicated code, and
15564 simplifies our callgraph. Closes ticket 16788.
15565 - When generating an event to send to the controller, we no longer
15566 put the event over the network immediately. Instead, we queue
15567 these events, and use a Libevent callback to deliver them. This
15568 change simplifies Tor's callgraph by reducing the number of
15569 functions from which all other Tor functions are reachable. Closes
15571 - Wrap Windows-only C files inside '#ifdef _WIN32' so that tools
15572 that try to scan or compile every file on Unix won't decide that
15574 - Remove the unused "nulterminate" argument from buf_pullup().
15577 - Recommend a 40 GB example AccountingMax in torrc.sample rather
15578 than a 4 GB max. Closes ticket 16742.
15579 - Include the TUNING document in our source tarball. It is referred
15580 to in the ChangeLog and an error message. Fixes bug 16929; bugfix
15584 - The internal pure-C tor-fw-helper tool is now removed from the Tor
15585 distribution, in favor of the pure-Go clone available from
15586 https://gitweb.torproject.org/tor-fw-helper.git/ . The libraries
15587 used by the C tor-fw-helper are not, in our opinion, very
15588 confidence- inspiring in their secure-programming techniques.
15589 Closes ticket 13338.
15590 - Remove the code that would try to aggressively flush controller
15591 connections while writing to them. This code was introduced in
15592 0.1.2.7-alpha, in order to keep output buffers from exceeding
15593 their limits. But there is no longer a maximum output buffer size,
15594 and flushing data in this way caused some undesirable recursions
15595 in our call graph. Closes ticket 16480.
15598 - Make "bridges+hs" the default test network. This tests almost all
15599 tor functionality during make test-network, while allowing tests
15600 to succeed on non-IPv6 systems. Requires chutney commit 396da92 in
15601 test-network-bridges-hs. Closes tickets 16945 (tor) and 16946
15602 (chutney). Patches by "teor".
15603 - Autodetect CHUTNEY_PATH if the chutney and Tor sources are side-
15604 by-side in the same parent directory. Closes ticket 16903. Patch
15606 - Use environment variables rather than autoconf substitutions to
15607 send variables from the build system to the test scripts. This
15608 change should be easier to maintain, and cause 'make distcheck' to
15609 work better than before. Fixes bug 17148.
15610 - Add a new set of callgraph analysis scripts that use clang to
15611 produce a list of which Tor functions are reachable from which
15612 other Tor functions. We're planning to use these to help simplify
15613 our code structure by identifying illogical dependencies.
15614 - Add new 'test-full' and 'test-full-online' targets to run all
15615 tests, including integration tests with stem and chutney.
15616 - Make the test-workqueue test work on Windows by initializing the
15617 network before we begin.
15618 - New make target (make test-network-all) to run multiple applicable
15619 chutney test cases. Patch from Teor; closes 16953.
15620 - Unit test dns_resolve(), dns_clip_ttl() and dns_get_expiry_ttl()
15621 functions in dns.c. Implements a portion of ticket 16831.
15622 - When building Tor with testing coverage enabled, run Chutney tests
15623 (if any) using the 'tor-cov' coverage binary.
15624 - When running test-network or test-stem, check for the absence of
15625 stem/chutney before doing any build operations.
15628 Changes in version 0.2.7.2-alpha - 2015-07-27
15629 This, the second alpha in the Tor 0.2.7 series, has a number of new
15630 features, including a way to manually pick the number of introduction
15631 points for hidden services, and the much stronger Ed25519 signing key
15632 algorithm for regular Tor relays (including support for encrypted
15633 offline identity keys in the new algorithm).
15635 Support for Ed25519 on relays is currently limited to signing router
15636 descriptors; later alphas in this series will extend Ed25519 key
15637 support to more parts of the Tor protocol.
15639 o Major features (Ed25519 identity keys, Proposal 220):
15640 - All relays now maintain a stronger identity key, using the Ed25519
15641 elliptic curve signature format. This master key is designed so
15642 that it can be kept offline. Relays also generate an online
15643 signing key, and a set of other Ed25519 keys and certificates.
15644 These are all automatically regenerated and rotated as needed.
15645 Implements part of ticket 12498.
15646 - Directory authorities now vote on Ed25519 identity keys along with
15647 RSA1024 keys. Implements part of ticket 12498.
15648 - Directory authorities track which Ed25519 identity keys have been
15649 used with which RSA1024 identity keys, and do not allow them to
15650 vary freely. Implements part of ticket 12498.
15651 - Microdescriptors now include Ed25519 identity keys. Implements
15652 part of ticket 12498.
15653 - Add support for offline encrypted Ed25519 master keys. To use this
15654 feature on your tor relay, run "tor --keygen" to make a new master
15655 key (or to make a new signing key if you already have a master
15656 key). Closes ticket 13642.
15658 o Major features (Hidden services):
15659 - Add the torrc option HiddenServiceNumIntroductionPoints, to
15660 specify a fixed number of introduction points. Its maximum value
15661 is 10 and default is 3. Using this option can increase a hidden
15662 service's reliability under load, at the cost of making it more
15663 visible that the hidden service is facing extra load. Closes
15665 - Remove the adaptive algorithm for choosing the number of
15666 introduction points, which used to change the number of
15667 introduction points (poorly) depending on the number of
15668 connections the HS sees. Closes ticket 4862.
15670 o Major features (onion key cross-certification):
15671 - Relay descriptors now include signatures of their own identity
15672 keys, made using the TAP and ntor onion keys. These signatures
15673 allow relays to prove ownership of their own onion keys. Because
15674 of this change, microdescriptors will no longer need to include
15675 RSA identity keys. Implements proposal 228; closes ticket 12499.
15677 o Major features (performance):
15678 - Improve the runtime speed of Ed25519 operations by using the
15679 public-domain Ed25519-donna by Andrew M. ("floodyberry").
15680 Implements ticket 16467.
15681 - Improve the runtime speed of the ntor handshake by using an
15682 optimized curve25519 basepoint scalarmult implementation from the
15683 public-domain Ed25519-donna by Andrew M. ("floodyberry"), based on
15684 ideas by Adam Langley. Implements ticket 9663.
15686 o Major bugfixes (client-side privacy, also in 0.2.6.9):
15687 - Properly separate out each SOCKSPort when applying stream
15688 isolation. The error occurred because each port's session group
15689 was being overwritten by a default value when the listener
15690 connection was initialized. Fixes bug 16247; bugfix on
15691 0.2.6.3-alpha. Patch by "jojelino".
15693 o Major bugfixes (hidden service clients, stability, also in 0.2.6.10):
15694 - Stop refusing to store updated hidden service descriptors on a
15695 client. This reverts commit 9407040c59218 (which indeed fixed bug
15696 14219, but introduced a major hidden service reachability
15697 regression detailed in bug 16381). This is a temporary fix since
15698 we can live with the minor issue in bug 14219 (it just results in
15699 some load on the network) but the regression of 16381 is too much
15700 of a setback. First-round fix for bug 16381; bugfix
15703 o Major bugfixes (hidden services):
15704 - When cannibalizing a circuit for an introduction point, always
15705 extend to the chosen exit node (creating a 4 hop circuit).
15706 Previously Tor would use the current circuit exit node, which
15707 changed the original choice of introduction point, and could cause
15708 the hidden service to skip excluded introduction points or
15709 reconnect to a skipped introduction point. Fixes bug 16260; bugfix
15712 o Major bugfixes (open file limit):
15713 - The open file limit wasn't checked before calling
15714 tor_accept_socket_nonblocking(), which would make Tor exceed the
15715 limit. Now, before opening a new socket, Tor validates the open
15716 file limit just before, and if the max has been reached, return an
15717 error. Fixes bug 16288; bugfix on 0.1.1.1-alpha.
15719 o Major bugfixes (stability, also in 0.2.6.10):
15720 - Stop crashing with an assertion failure when parsing certain kinds
15721 of malformed or truncated microdescriptors. Fixes bug 16400;
15722 bugfix on 0.2.6.1-alpha. Found by "torkeln"; fix based on a patch
15723 by "cypherpunks_backup".
15724 - Stop random client-side assertion failures that could occur when
15725 connecting to a busy hidden service, or connecting to a hidden
15726 service while a NEWNYM is in progress. Fixes bug 16013; bugfix
15729 o Minor features (directory authorities, security, also in 0.2.6.9):
15730 - The HSDir flag given by authorities now requires the Stable flag.
15731 For the current network, this results in going from 2887 to 2806
15732 HSDirs. Also, it makes it harder for an attacker to launch a sybil
15733 attack by raising the effort for a relay to become Stable to
15734 require at the very least 7 days, while maintaining the 96 hours
15735 uptime requirement for HSDir. Implements ticket 8243.
15737 o Minor features (client):
15738 - Relax the validation of hostnames in SOCKS5 requests, allowing the
15739 character '_' to appear, in order to cope with domains observed in
15740 the wild that are serving non-RFC compliant records. Resolves
15742 - Relax the validation done to hostnames in SOCKS5 requests, and
15743 allow a single trailing '.' to cope with clients that pass FQDNs
15744 using that syntax to explicitly indicate that the domain name is
15745 fully-qualified. Fixes bug 16674; bugfix on 0.2.6.2-alpha.
15746 - Add GroupWritable and WorldWritable options to unix-socket based
15747 SocksPort and ControlPort options. These options apply to a single
15748 socket, and override {Control,Socks}SocketsGroupWritable. Closes
15751 o Minor features (control protocol):
15752 - Support network-liveness GETINFO key and NETWORK_LIVENESS event in
15753 the control protocol. Resolves ticket 15358.
15755 o Minor features (directory authorities):
15756 - Directory authorities no longer vote against the "Fast", "Stable",
15757 and "HSDir" flags just because they were going to vote against
15758 "Running": if the consensus turns out to be that the router was
15759 running, then the authority's vote should count. Patch from Peter
15760 Retzlaff; closes issue 8712.
15762 o Minor features (geoip, also in 0.2.6.10):
15763 - Update geoip to the June 3 2015 Maxmind GeoLite2 Country database.
15764 - Update geoip6 to the June 3 2015 Maxmind GeoLite2 Country database.
15766 o Minor features (hidden services):
15767 - Add the new options "HiddenServiceMaxStreams" and
15768 "HiddenServiceMaxStreamsCloseCircuit" to allow hidden services to
15769 limit the maximum number of simultaneous streams per circuit, and
15770 optionally tear down the circuit when the limit is exceeded. Part
15773 o Minor features (portability):
15774 - Use C99 variadic macros when the compiler is not GCC. This avoids
15775 failing compilations on MSVC, and fixes a log-file-based race
15776 condition in our old workarounds. Original patch from Gisle Vanem.
15778 o Minor bugfixes (compilation, also in 0.2.6.9):
15779 - Build with --enable-systemd correctly when libsystemd is
15780 installed, but systemd is not. Fixes bug 16164; bugfix on
15781 0.2.6.3-alpha. Patch from Peter Palfrader.
15783 o Minor bugfixes (controller):
15784 - Add the descriptor ID in each HS_DESC control event. It was
15785 missing, but specified in control-spec.txt. Fixes bug 15881;
15786 bugfix on 0.2.5.2-alpha.
15788 o Minor bugfixes (crypto error-handling, also in 0.2.6.10):
15789 - Check for failures from crypto_early_init, and refuse to continue.
15790 A previous typo meant that we could keep going with an
15791 uninitialized crypto library, and would have OpenSSL initialize
15792 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
15793 when implementing ticket 4900. Patch by "teor".
15795 o Minor bugfixes (hidden services):
15796 - Fix a crash when reloading configuration while at least one
15797 configured and one ephemeral hidden service exists. Fixes bug
15798 16060; bugfix on 0.2.7.1-alpha.
15799 - Avoid crashing with a double-free bug when we create an ephemeral
15800 hidden service but adding it fails for some reason. Fixes bug
15801 16228; bugfix on 0.2.7.1-alpha.
15803 o Minor bugfixes (Linux seccomp2 sandbox):
15804 - Use the sandbox in tor_open_cloexec whether or not O_CLOEXEC is
15805 defined. Patch by "teor". Fixes bug 16515; bugfix on 0.2.3.1-alpha.
15807 o Minor bugfixes (Linux seccomp2 sandbox, also in 0.2.6.10):
15808 - Allow pipe() and pipe2() syscalls in the seccomp2 sandbox: we need
15809 these when eventfd2() support is missing. Fixes bug 16363; bugfix
15810 on 0.2.6.3-alpha. Patch from "teor".
15812 o Minor bugfixes (Linux seccomp2 sandbox, also in 0.2.6.9):
15813 - Fix sandboxing to work when running as a relay, by allowing the
15814 renaming of secret_id_key, and allowing the eventfd2 and futex
15815 syscalls. Fixes bug 16244; bugfix on 0.2.6.1-alpha. Patch by
15817 - Allow systemd connections to work with the Linux seccomp2 sandbox
15818 code. Fixes bug 16212; bugfix on 0.2.6.2-alpha. Patch by
15821 o Minor bugfixes (relay):
15822 - Fix a rarely-encountered memory leak when failing to initialize
15823 the thread pool. Fixes bug 16631; bugfix on 0.2.6.3-alpha. Patch
15824 from "cypherpunks".
15826 o Minor bugfixes (systemd):
15827 - Fix an accidental formatting error that broke the systemd
15828 configuration file. Fixes bug 16152; bugfix on 0.2.7.1-alpha.
15829 - Tor's systemd unit file no longer contains extraneous spaces.
15830 These spaces would sometimes confuse tools like deb-systemd-
15831 helper. Fixes bug 16162; bugfix on 0.2.5.5-alpha.
15833 o Minor bugfixes (tests):
15834 - Use the configured Python executable when running test-stem-full.
15835 Fixes bug 16470; bugfix on 0.2.7.1-alpha.
15837 o Minor bugfixes (tests, also in 0.2.6.9):
15838 - Fix a crash in the unit tests when built with MSVC2013. Fixes bug
15839 16030; bugfix on 0.2.6.2-alpha. Patch from "NewEraCracker".
15841 o Minor bugfixes (threads, comments):
15842 - Always initialize return value in compute_desc_id in rendcommon.c
15843 Patch by "teor". Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
15844 - Check for NULL values in getinfo_helper_onions(). Patch by "teor".
15845 Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
15846 - Remove undefined directive-in-macro in test_util_writepid clang
15847 3.7 complains that using a preprocessor directive inside a macro
15848 invocation in test_util_writepid in test_util.c is undefined.
15849 Patch by "teor". Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
15851 o Code simplification and refactoring:
15852 - Define WINVER and _WIN32_WINNT centrally, in orconfig.h, in order
15853 to ensure they remain consistent and visible everywhere.
15854 - Remove some vestigial workarounds for the MSVC6 compiler. We
15855 haven't supported that in ages.
15856 - The link authentication code has been refactored for better
15857 testability and reliability. It now uses code generated with the
15858 "trunnel" binary encoding generator, to reduce the risk of bugs
15859 due to programmer error. Done as part of ticket 12498.
15862 - Include a specific and (hopefully) accurate documentation of the
15863 torrc file's meta-format in doc/torrc_format.txt. This is mainly
15864 of interest to people writing programs to parse or generate torrc
15865 files. This document is not a commitment to long-term
15866 compatibility; some aspects of the current format are a bit
15867 ridiculous. Closes ticket 2325.
15869 o Removed features:
15870 - Tor no longer supports copies of OpenSSL that are missing support
15871 for Elliptic Curve Cryptography. (We began using ECC when
15872 available in 0.2.4.8-alpha, for more safe and efficient key
15873 negotiation.) In particular, support for at least one of P256 or
15874 P224 is now required, with manual configuration needed if only
15875 P224 is available. Resolves ticket 16140.
15876 - Tor no longer supports versions of OpenSSL before 1.0. (If you are
15877 on an operating system that has not upgraded to OpenSSL 1.0 or
15878 later, and you compile Tor from source, you will need to install a
15879 more recent OpenSSL to link Tor against.) These versions of
15880 OpenSSL are still supported by the OpenSSL, but the numerous
15881 cryptographic improvements in later OpenSSL releases makes them a
15882 clear choice. Resolves ticket 16034.
15883 - Remove the HidServDirectoryV2 option. Now all relays offer to
15884 store hidden service descriptors. Related to 16543.
15885 - Remove the VoteOnHidServDirectoriesV2 option, since all
15886 authorities have long set it to 1. Closes ticket 16543.
15889 - Document use of coverity, clang static analyzer, and clang dynamic
15890 undefined behavior and address sanitizers in doc/HACKING. Include
15891 detailed usage instructions in the blacklist. Patch by "teor".
15892 Closes ticket 15817.
15893 - The link authentication protocol code now has extensive tests.
15894 - The relay descriptor signature testing code now has
15896 - The test_workqueue program now runs faster, and is enabled by
15897 default as a part of "make check".
15898 - Now that OpenSSL has its own scrypt implementation, add an unit
15899 test that checks for interoperability between libscrypt_scrypt()
15900 and OpenSSL's EVP_PBE_scrypt() so that we could not use libscrypt
15901 and rely on EVP_PBE_scrypt() whenever possible. Resolves
15905 Changes in version 0.2.6.10 - 2015-07-12
15906 Tor version 0.2.6.10 fixes some significant stability and hidden
15907 service client bugs, bulletproofs the cryptography init process, and
15908 fixes a bug when using the sandbox code with some older versions of
15909 Linux. Everyone running an older version, especially an older version
15910 of 0.2.6, should upgrade.
15912 o Major bugfixes (hidden service clients, stability):
15913 - Stop refusing to store updated hidden service descriptors on a
15914 client. This reverts commit 9407040c59218 (which indeed fixed bug
15915 14219, but introduced a major hidden service reachability
15916 regression detailed in bug 16381). This is a temporary fix since
15917 we can live with the minor issue in bug 14219 (it just results in
15918 some load on the network) but the regression of 16381 is too much
15919 of a setback. First-round fix for bug 16381; bugfix
15922 o Major bugfixes (stability):
15923 - Stop crashing with an assertion failure when parsing certain kinds
15924 of malformed or truncated microdescriptors. Fixes bug 16400;
15925 bugfix on 0.2.6.1-alpha. Found by "torkeln"; fix based on a patch
15926 by "cypherpunks_backup".
15927 - Stop random client-side assertion failures that could occur when
15928 connecting to a busy hidden service, or connecting to a hidden
15929 service while a NEWNYM is in progress. Fixes bug 16013; bugfix
15932 o Minor features (geoip):
15933 - Update geoip to the June 3 2015 Maxmind GeoLite2 Country database.
15934 - Update geoip6 to the June 3 2015 Maxmind GeoLite2 Country database.
15936 o Minor bugfixes (crypto error-handling):
15937 - Check for failures from crypto_early_init, and refuse to continue.
15938 A previous typo meant that we could keep going with an
15939 uninitialized crypto library, and would have OpenSSL initialize
15940 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
15941 when implementing ticket 4900. Patch by "teor".
15943 o Minor bugfixes (Linux seccomp2 sandbox):
15944 - Allow pipe() and pipe2() syscalls in the seccomp2 sandbox: we need
15945 these when eventfd2() support is missing. Fixes bug 16363; bugfix
15946 on 0.2.6.3-alpha. Patch from "teor".
15949 Changes in version 0.2.6.9 - 2015-06-11
15950 Tor 0.2.6.9 fixes a regression in the circuit isolation code, increases the
15951 requirements for receiving an HSDir flag, and addresses some other small
15952 bugs in the systemd and sandbox code. Clients using circuit isolation
15953 should upgrade; all directory authorities should upgrade.
15955 o Major bugfixes (client-side privacy):
15956 - Properly separate out each SOCKSPort when applying stream
15957 isolation. The error occurred because each port's session group was
15958 being overwritten by a default value when the listener connection
15959 was initialized. Fixes bug 16247; bugfix on 0.2.6.3-alpha. Patch
15962 o Minor feature (directory authorities, security):
15963 - The HSDir flag given by authorities now requires the Stable flag.
15964 For the current network, this results in going from 2887 to 2806
15965 HSDirs. Also, it makes it harder for an attacker to launch a sybil
15966 attack by raising the effort for a relay to become Stable which
15967 takes at the very least 7 days to do so and by keeping the 96
15968 hours uptime requirement for HSDir. Implements ticket 8243.
15970 o Minor bugfixes (compilation):
15971 - Build with --enable-systemd correctly when libsystemd is
15972 installed, but systemd is not. Fixes bug 16164; bugfix on
15973 0.2.6.3-alpha. Patch from Peter Palfrader.
15975 o Minor bugfixes (Linux seccomp2 sandbox):
15976 - Fix sandboxing to work when running as a relaymby renaming of
15977 secret_id_key, and allowing the eventfd2 and futex syscalls. Fixes
15978 bug 16244; bugfix on 0.2.6.1-alpha. Patch by Peter Palfrader.
15979 - Allow systemd connections to work with the Linux seccomp2 sandbox
15980 code. Fixes bug 16212; bugfix on 0.2.6.2-alpha. Patch by
15983 o Minor bugfixes (tests):
15984 - Fix a crash in the unit tests when built with MSVC2013. Fixes bug
15985 16030; bugfix on 0.2.6.2-alpha. Patch from "NewEraCracker".
15988 Changes in version 0.2.6.8 - 2015-05-21
15989 Tor 0.2.6.8 fixes a bit of dodgy code in parsing INTRODUCE2 cells, and
15990 fixes an authority-side bug in assigning the HSDir flag. All directory
15991 authorities should upgrade.
15993 o Major bugfixes (hidden services, backport from 0.2.7.1-alpha):
15994 - Revert commit that made directory authorities assign the HSDir
15995 flag to relays without a DirPort; this was bad because such relays
15996 can't handle BEGIN_DIR cells. Fixes bug 15850; bugfix
15999 o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
16000 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
16001 a client authorized hidden service. Fixes bug 15823; bugfix
16004 o Minor features (geoip):
16005 - Update geoip to the April 8 2015 Maxmind GeoLite2 Country database.
16006 - Update geoip6 to the April 8 2015 Maxmind GeoLite2
16010 Changes in version 0.2.7.1-alpha - 2015-05-12
16011 Tor 0.2.7.1-alpha is the first alpha release in its series. It
16012 includes numerous small features and bugfixes against previous Tor
16013 versions, and numerous small infrastructure improvements. The most
16014 notable features are several new ways for controllers to interact with
16015 the hidden services subsystem.
16017 o New system requirements:
16018 - Tor no longer includes workarounds to support Libevent versions
16019 before 1.3e. Libevent 2.0 or later is recommended. Closes
16022 o Major features (controller):
16023 - Add the ADD_ONION and DEL_ONION commands that allow the creation
16024 and management of hidden services via the controller. Closes
16026 - New "GETINFO onions/current" and "GETINFO onions/detached"
16027 commands to get information about hidden services created via the
16028 controller. Part of ticket 6411.
16029 - New HSFETCH command to launch a request for a hidden service
16030 descriptor. Closes ticket 14847.
16031 - New HSPOST command to upload a hidden service descriptor. Closes
16032 ticket 3523. Patch by "DonnchaC".
16034 o Major bugfixes (hidden services):
16035 - Revert commit that made directory authorities assign the HSDir
16036 flag to relays without a DirPort; this was bad because such relays
16037 can't handle BEGIN_DIR cells. Fixes bug 15850; bugfix
16040 o Minor features (clock-jump tolerance):
16041 - Recover better when our clock jumps back many hours, like might
16042 happen for Tails or Whonix users who start with a very wrong
16043 hardware clock, use Tor to discover a more accurate time, and then
16044 fix their clock. Resolves part of ticket 8766.
16046 o Minor features (command-line interface):
16047 - Make --hash-password imply --hush to prevent unnecessary noise.
16048 Closes ticket 15542. Patch from "cypherpunks".
16049 - Print a warning whenever we find a relative file path being used
16050 as torrc option. Resolves issue 14018.
16052 o Minor features (controller):
16053 - Add DirAuthority lines for default directory authorities to the
16054 output of the "GETINFO config/defaults" command if not already
16055 present. Implements ticket 14840.
16056 - Controllers can now use "GETINFO hs/client/desc/id/..." to
16057 retrieve items from the client's hidden service descriptor cache.
16058 Closes ticket 14845.
16059 - Implement a new controller command "GETINFO status/fresh-relay-
16060 descs" to fetch a descriptor/extrainfo pair that was generated on
16061 demand just for the controller's use. Implements ticket 14784.
16063 o Minor features (DoS-resistance):
16064 - Make it harder for attackers to overload hidden services with
16065 introductions, by blocking multiple introduction requests on the
16066 same circuit. Resolves ticket 15515.
16068 o Minor features (geoip):
16069 - Update geoip to the April 8 2015 Maxmind GeoLite2 Country database.
16070 - Update geoip6 to the April 8 2015 Maxmind GeoLite2
16073 o Minor features (HS popularity countermeasure):
16074 - To avoid leaking HS popularity, don't cycle the introduction point
16075 when we've handled a fixed number of INTRODUCE2 cells but instead
16076 cycle it when a random number of introductions is reached, thus
16077 making it more difficult for an attacker to find out the amount of
16078 clients that have used the introduction point for a specific HS.
16079 Closes ticket 15745.
16081 o Minor features (logging):
16082 - Include the Tor version in all LD_BUG log messages, since people
16083 tend to cut and paste those into the bugtracker. Implements
16086 o Minor features (pluggable transports):
16087 - When launching managed pluggable transports on Linux systems,
16088 attempt to have the kernel deliver a SIGTERM on tor exit if the
16089 pluggable transport process is still running. Resolves
16091 - When launching managed pluggable transports, setup a valid open
16092 stdin in the child process that can be used to detect if tor has
16093 terminated. The "TOR_PT_EXIT_ON_STDIN_CLOSE" environment variable
16094 can be used by implementations to detect this new behavior.
16095 Resolves ticket 15435.
16097 o Minor features (testing):
16098 - Add a test to verify that the compiler does not eliminate our
16099 memwipe() implementation. Closes ticket 15377.
16100 - Add make rule `check-changes` to verify the format of changes
16101 files. Closes ticket 15180.
16102 - Add unit tests for control_event_is_interesting(). Add a compile-
16103 time check that the number of events doesn't exceed the capacity
16104 of control_event_t.event_mask. Closes ticket 15431, checks for
16105 bugs similar to 13085. Patch by "teor".
16106 - Command-line argument tests moved to Stem. Resolves ticket 14806.
16107 - Integrate the ntor, backtrace, and zero-length keys tests into the
16108 automake test suite. Closes ticket 15344.
16109 - Remove assertions during builds to determine Tor's test coverage.
16110 We don't want to trigger these even in assertions, so including
16111 them artificially makes our branch coverage look worse than it is.
16112 This patch provides the new test-stem-full and coverage-html-full
16113 configure options. Implements ticket 15400.
16115 o Minor bugfixes (build):
16116 - Improve out-of-tree builds by making non-standard rules work and
16117 clean up additional files and directories. Fixes bug 15053; bugfix
16120 o Minor bugfixes (command-line interface):
16121 - When "--quiet" is provided along with "--validate-config", do not
16122 write anything to stdout on success. Fixes bug 14994; bugfix
16124 - When complaining about bad arguments to "--dump-config", use
16125 stderr, not stdout.
16127 o Minor bugfixes (configuration, unit tests):
16128 - Only add the default fallback directories when the DirAuthorities,
16129 AlternateDirAuthority, and FallbackDir directory config options
16130 are set to their defaults. The default fallback directory list is
16131 currently empty, this fix will only change tor's behavior when it
16132 has default fallback directories. Includes unit tests for
16133 consider_adding_dir_servers(). Fixes bug 15642; bugfix on
16134 90f6071d8dc0 in 0.2.4.7-alpha. Patch by "teor".
16136 o Minor bugfixes (correctness):
16137 - For correctness, avoid modifying a constant string in
16138 handle_control_postdescriptor. Fixes bug 15546; bugfix
16140 - Remove side-effects from tor_assert() calls. This was harmless,
16141 because we never disable assertions, but it is bad style and
16142 unnecessary. Fixes bug 15211; bugfix on 0.2.5.5, 0.2.2.36,
16145 o Minor bugfixes (hidden service):
16146 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
16147 a client authorized hidden service. Fixes bug 15823; bugfix
16149 - Remove an extraneous newline character from the end of hidden
16150 service descriptors. Fixes bug 15296; bugfix on 0.2.0.10-alpha.
16152 o Minor bugfixes (interface):
16153 - Print usage information for --dump-config when it is used without
16154 an argument. Also, fix the error message to use different wording
16155 and add newline at the end. Fixes bug 15541; bugfix
16158 o Minor bugfixes (logs):
16159 - When building Tor under Clang, do not include an extra set of
16160 parentheses in log messages that include function names. Fixes bug
16161 15269; bugfix on every released version of Tor when compiled with
16162 recent enough Clang.
16164 o Minor bugfixes (network):
16165 - When attempting to use fallback technique for network interface
16166 lookup, disregard loopback and multicast addresses since they are
16167 unsuitable for public communications.
16169 o Minor bugfixes (statistics):
16170 - Disregard the ConnDirectionStatistics torrc options when Tor is
16171 not a relay since in that mode of operation no sensible data is
16172 being collected and because Tor might run into measurement hiccups
16173 when running as a client for some time, then becoming a relay.
16174 Fixes bug 15604; bugfix on 0.2.2.35.
16176 o Minor bugfixes (test networks):
16177 - When self-testing reachability, use ExtendAllowPrivateAddresses to
16178 determine if local/private addresses imply reachability. The
16179 previous fix used TestingTorNetwork, which implies
16180 ExtendAllowPrivateAddresses, but this excluded rare configurations
16181 where ExtendAllowPrivateAddresses is set but TestingTorNetwork is
16182 not. Fixes bug 15771; bugfix on 0.2.6.1-alpha. Patch by "teor",
16183 issue discovered by CJ Ess.
16185 o Minor bugfixes (testing):
16186 - Check for matching value in server response in ntor_ref.py. Fixes
16187 bug 15591; bugfix on 0.2.4.8-alpha. Reported and fixed
16189 - Set the severity correctly when testing
16190 get_interface_addresses_ifaddrs() and
16191 get_interface_addresses_win32(), so that the tests fail gracefully
16192 instead of triggering an assertion. Fixes bug 15759; bugfix on
16193 0.2.6.3-alpha. Reported by Nicolas Derive.
16195 o Code simplification and refactoring:
16196 - Move the hacky fallback code out of get_interface_address6() into
16197 separate function and get it covered with unit-tests. Resolves
16199 - Refactor hidden service client-side cache lookup to intelligently
16200 report its various failure cases, and disentangle failure cases
16201 involving a lack of introduction points. Closes ticket 14391.
16202 - Use our own Base64 encoder instead of OpenSSL's, to allow more
16203 control over the output. Part of ticket 15652.
16206 - Improve the descriptions of statistics-related torrc options in
16207 the manpage to describe rationale and possible uses cases. Fixes
16209 - Improve the layout and formatting of ./configure --help messages.
16210 Closes ticket 15024. Patch from "cypherpunks".
16211 - Standardize on the term "server descriptor" in the manual page.
16212 Previously, we had used "router descriptor", "server descriptor",
16213 and "relay descriptor" interchangeably. Part of ticket 14987.
16216 - Remove `USE_OPENSSL_BASE64` and the corresponding fallback code
16217 and always use the internal Base64 decoder. The internal decoder
16218 has been part of tor since 0.2.0.10-alpha, and no one should
16219 be using the OpenSSL one. Part of ticket 15652.
16220 - Remove the 'tor_strclear()' function; use memwipe() instead.
16221 Closes ticket 14922.
16223 o Removed features:
16224 - Remove the (seldom-used) DynamicDHGroups feature. For anti-
16225 fingerprinting we now recommend pluggable transports; for forward-
16226 secrecy in TLS, we now use the P-256 group. Closes ticket 13736.
16227 - Remove the undocumented "--digests" command-line option. It
16228 complicated our build process, caused subtle build issues on
16229 multiple platforms, and is now redundant since we started
16230 including git version identifiers. Closes ticket 14742.
16231 - Tor no longer contains checks for ancient directory cache versions
16232 that didn't know about microdescriptors.
16233 - Tor no longer contains workarounds for stat files generated by
16234 super-old versions of Tor that didn't choose guards sensibly.
16237 Changes in version 0.2.4.27 - 2015-04-06
16238 Tor 0.2.4.27 backports two fixes from 0.2.6.7 for security issues that
16239 could be used by an attacker to crash hidden services, or crash clients
16240 visiting hidden services. Hidden services should upgrade as soon as
16241 possible; clients should upgrade whenever packages become available.
16243 This release also backports a simple improvement to make hidden
16244 services a bit less vulnerable to denial-of-service attacks.
16246 o Major bugfixes (security, hidden service):
16247 - Fix an issue that would allow a malicious client to trigger an
16248 assertion failure and halt a hidden service. Fixes bug 15600;
16249 bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
16250 - Fix a bug that could cause a client to crash with an assertion
16251 failure when parsing a malformed hidden service descriptor. Fixes
16252 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
16254 o Minor features (DoS-resistance, hidden service):
16255 - Introduction points no longer allow multiple INTRODUCE1 cells to
16256 arrive on the same circuit. This should make it more expensive for
16257 attackers to overwhelm hidden services with introductions.
16258 Resolves ticket 15515.
16261 Changes in version 0.2.5.12 - 2015-04-06
16262 Tor 0.2.5.12 backports two fixes from 0.2.6.7 for security issues that
16263 could be used by an attacker to crash hidden services, or crash clients
16264 visiting hidden services. Hidden services should upgrade as soon as
16265 possible; clients should upgrade whenever packages become available.
16267 This release also backports a simple improvement to make hidden
16268 services a bit less vulnerable to denial-of-service attacks.
16270 o Major bugfixes (security, hidden service):
16271 - Fix an issue that would allow a malicious client to trigger an
16272 assertion failure and halt a hidden service. Fixes bug 15600;
16273 bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
16274 - Fix a bug that could cause a client to crash with an assertion
16275 failure when parsing a malformed hidden service descriptor. Fixes
16276 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
16278 o Minor features (DoS-resistance, hidden service):
16279 - Introduction points no longer allow multiple INTRODUCE1 cells to
16280 arrive on the same circuit. This should make it more expensive for
16281 attackers to overwhelm hidden services with introductions.
16282 Resolves ticket 15515.
16285 Changes in version 0.2.6.7 - 2015-04-06
16286 Tor 0.2.6.7 fixes two security issues that could be used by an
16287 attacker to crash hidden services, or crash clients visiting hidden
16288 services. Hidden services should upgrade as soon as possible; clients
16289 should upgrade whenever packages become available.
16291 This release also contains two simple improvements to make hidden
16292 services a bit less vulnerable to denial-of-service attacks.
16294 o Major bugfixes (security, hidden service):
16295 - Fix an issue that would allow a malicious client to trigger an
16296 assertion failure and halt a hidden service. Fixes bug 15600;
16297 bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
16298 - Fix a bug that could cause a client to crash with an assertion
16299 failure when parsing a malformed hidden service descriptor. Fixes
16300 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
16302 o Minor features (DoS-resistance, hidden service):
16303 - Introduction points no longer allow multiple INTRODUCE1 cells to
16304 arrive on the same circuit. This should make it more expensive for
16305 attackers to overwhelm hidden services with introductions.
16306 Resolves ticket 15515.
16307 - Decrease the amount of reattempts that a hidden service performs
16308 when its rendezvous circuits fail. This reduces the computational
16309 cost for running a hidden service under heavy load. Resolves
16313 Changes in version 0.2.6.6 - 2015-03-24
16314 Tor 0.2.6.6 is the first stable release in the 0.2.6 series.
16316 It adds numerous safety, security, correctness, and performance
16317 improvements. Client programs can be configured to use more kinds of
16318 sockets, AutomapHosts works better, the multithreading backend is
16319 improved, cell transmission is refactored, test coverage is much
16320 higher, more denial-of-service attacks are handled, guard selection is
16321 improved to handle long-term guards better, pluggable transports
16322 should work a bit better, and some annoying hidden service performance
16323 bugs should be addressed.
16325 o Minor bugfixes (portability):
16326 - Use the correct datatype in the SipHash-2-4 function to prevent
16327 compilers from assuming any sort of alignment. Fixes bug 15436;
16328 bugfix on 0.2.5.3-alpha.
16330 Changes in version 0.2.6.5-rc - 2015-03-18
16331 Tor 0.2.6.5-rc is the second and (hopefully) last release candidate in
16332 the 0.2.6. It fixes a small number of bugs found in 0.2.6.4-rc.
16334 o Major bugfixes (client):
16335 - Avoid crashing when making certain configuration option changes on
16336 clients. Fixes bug 15245; bugfix on 0.2.6.3-alpha. Reported
16339 o Major bugfixes (pluggable transports):
16340 - Initialize the extended OR Port authentication cookie before
16341 launching pluggable transports. This prevents a race condition
16342 that occurred when server-side pluggable transports would cache the
16343 authentication cookie before it has been (re)generated. Fixes bug
16344 15240; bugfix on 0.2.5.1-alpha.
16346 o Major bugfixes (portability):
16347 - Do not crash on startup when running on Solaris. Fixes a bug
16348 related to our fix for 9495; bugfix on 0.2.6.1-alpha. Reported
16351 o Minor features (heartbeat):
16352 - On relays, report how many connections we negotiated using each
16353 version of the Tor link protocols. This information will let us
16354 know if removing support for very old versions of the Tor
16355 protocols is harming the network. Closes ticket 15212.
16357 o Code simplification and refactoring:
16358 - Refactor main loop to extract the 'loop' part. This makes it
16359 easier to run Tor under Shadow. Closes ticket 15176.
16362 Changes in version 0.2.5.11 - 2015-03-17
16363 Tor 0.2.5.11 is the second stable release in the 0.2.5 series.
16365 It backports several bugfixes from the 0.2.6 branch, including a
16366 couple of medium-level security fixes for relays and exit nodes.
16367 It also updates the list of directory authorities.
16369 o Directory authority changes:
16370 - Remove turtles as a directory authority.
16371 - Add longclaw as a new (v3) directory authority. This implements
16372 ticket 13296. This keeps the directory authority count at 9.
16373 - The directory authority Faravahar has a new IP address. This
16374 closes ticket 14487.
16376 o Major bugfixes (crash, OSX, security):
16377 - Fix a remote denial-of-service opportunity caused by a bug in
16378 OSX's _strlcat_chk() function. Fixes bug 15205; bug first appeared
16381 o Major bugfixes (relay, stability, possible security):
16382 - Fix a bug that could lead to a relay crashing with an assertion
16383 failure if a buffer of exactly the wrong layout was passed to
16384 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
16385 0.2.0.10-alpha. Patch from 'cypherpunks'.
16386 - Do not assert if the 'data' pointer on a buffer is advanced to the
16387 very end of the buffer; log a BUG message instead. Only assert if
16388 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
16390 o Major bugfixes (exit node stability):
16391 - Fix an assertion failure that could occur under high DNS load.
16392 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
16393 diagnosed and fixed by "cypherpunks".
16395 o Major bugfixes (Linux seccomp2 sandbox):
16396 - Upon receiving sighup with the seccomp2 sandbox enabled, do not
16397 crash during attempts to call wait4. Fixes bug 15088; bugfix on
16398 0.2.5.1-alpha. Patch from "sanic".
16400 o Minor features (controller):
16401 - New "GETINFO bw-event-cache" to get information about recent
16402 bandwidth events. Closes ticket 14128. Useful for controllers to
16403 get recent bandwidth history after the fix for ticket 13988.
16405 o Minor features (geoip):
16406 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
16407 - Update geoip6 to the March 3 2015 Maxmind GeoLite2
16410 o Minor bugfixes (client, automapping):
16411 - Avoid crashing on torrc lines for VirtualAddrNetworkIPv[4|6] when
16412 no value follows the option. Fixes bug 14142; bugfix on
16413 0.2.4.7-alpha. Patch by "teor".
16414 - Fix a memory leak when using AutomapHostsOnResolve. Fixes bug
16415 14195; bugfix on 0.1.0.1-rc.
16417 o Minor bugfixes (compilation):
16418 - Build without warnings with the stock OpenSSL srtp.h header, which
16419 has a duplicate declaration of SSL_get_selected_srtp_profile().
16420 Fixes bug 14220; this is OpenSSL's bug, not ours.
16422 o Minor bugfixes (directory authority):
16423 - Allow directory authorities to fetch more data from one another if
16424 they find themselves missing lots of votes. Previously, they had
16425 been bumping against the 10 MB queued data limit. Fixes bug 14261;
16426 bugfix on 0.1.2.5-alpha.
16427 - Enlarge the buffer to read bwauth generated files to avoid an
16428 issue when parsing the file in dirserv_read_measured_bandwidths().
16429 Fixes bug 14125; bugfix on 0.2.2.1-alpha.
16431 o Minor bugfixes (statistics):
16432 - Increase period over which bandwidth observations are aggregated
16433 from 15 minutes to 4 hours. Fixes bug 13988; bugfix on 0.0.8pre1.
16435 o Minor bugfixes (preventative security, C safety):
16436 - When reading a hexadecimal, base-32, or base-64 encoded value from
16437 a string, always overwrite the whole output buffer. This prevents
16438 some bugs where we would look at (but fortunately, not reveal)
16439 uninitialized memory on the stack. Fixes bug 14013; bugfix on all
16443 Changes in version 0.2.4.26 - 2015-03-17
16444 Tor 0.2.4.26 includes an updated list of directory authorities. It
16445 also backports a couple of stability and security bugfixes from 0.2.5
16448 o Directory authority changes:
16449 - Remove turtles as a directory authority.
16450 - Add longclaw as a new (v3) directory authority. This implements
16451 ticket 13296. This keeps the directory authority count at 9.
16452 - The directory authority Faravahar has a new IP address. This
16453 closes ticket 14487.
16455 o Major bugfixes (exit node stability, also in 0.2.6.3-alpha):
16456 - Fix an assertion failure that could occur under high DNS load.
16457 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
16458 diagnosed and fixed by "cypherpunks".
16460 o Major bugfixes (relay, stability, possible security, also in 0.2.6.4-rc):
16461 - Fix a bug that could lead to a relay crashing with an assertion
16462 failure if a buffer of exactly the wrong layout was passed to
16463 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
16464 0.2.0.10-alpha. Patch from 'cypherpunks'.
16465 - Do not assert if the 'data' pointer on a buffer is advanced to the
16466 very end of the buffer; log a BUG message instead. Only assert if
16467 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
16469 o Minor features (geoip):
16470 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
16471 - Update geoip6 to the March 3 2015 Maxmind GeoLite2
16474 Changes in version 0.2.6.4-rc - 2015-03-09
16475 Tor 0.2.6.4-alpha fixes an issue in the directory code that an
16476 attacker might be able to use in order to crash certain Tor
16477 directories. It also resolves some minor issues left over from, or
16478 introduced in, Tor 0.2.6.3-alpha or earlier.
16480 o Major bugfixes (crash, OSX, security):
16481 - Fix a remote denial-of-service opportunity caused by a bug in
16482 OSX's _strlcat_chk() function. Fixes bug 15205; bug first appeared
16485 o Major bugfixes (relay, stability, possible security):
16486 - Fix a bug that could lead to a relay crashing with an assertion
16487 failure if a buffer of exactly the wrong layout is passed to
16488 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
16489 0.2.0.10-alpha. Patch from "cypherpunks".
16490 - Do not assert if the 'data' pointer on a buffer is advanced to the
16491 very end of the buffer; log a BUG message instead. Only assert if
16492 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
16494 o Major bugfixes (FreeBSD IPFW transparent proxy):
16495 - Fix address detection with FreeBSD transparent proxies, when
16496 "TransProxyType ipfw" is in use. Fixes bug 15064; bugfix
16499 o Major bugfixes (Linux seccomp2 sandbox):
16500 - Pass IPPROTO_TCP rather than 0 to socket(), so that the Linux
16501 seccomp2 sandbox doesn't fail. Fixes bug 14989; bugfix
16503 - Allow AF_UNIX hidden services to be used with the seccomp2
16504 sandbox. Fixes bug 15003; bugfix on 0.2.6.3-alpha.
16505 - Upon receiving sighup with the seccomp2 sandbox enabled, do not
16506 crash during attempts to call wait4. Fixes bug 15088; bugfix on
16507 0.2.5.1-alpha. Patch from "sanic".
16509 o Minor features (controller):
16510 - Messages about problems in the bootstrap process now include
16511 information about the server we were trying to connect to when we
16512 noticed the problem. Closes ticket 15006.
16514 o Minor features (geoip):
16515 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
16516 - Update geoip6 to the March 3 2015 Maxmind GeoLite2
16519 o Minor features (logs):
16520 - Quiet some log messages in the heartbeat and at startup. Closes
16523 o Minor bugfixes (certificate handling):
16524 - If an authority operator accidentally makes a signing certificate
16525 with a future publication time, do not discard its real signing
16526 certificates. Fixes bug 11457; bugfix on 0.2.0.3-alpha.
16527 - Remove any old authority certificates that have been superseded
16528 for at least two days. Previously, we would keep superseded
16529 certificates until they expired, if they were published close in
16530 time to the certificate that superseded them. Fixes bug 11454;
16531 bugfix on 0.2.1.8-alpha.
16533 o Minor bugfixes (compilation):
16534 - Fix a compilation warning on s390. Fixes bug 14988; bugfix
16536 - Fix a compilation warning on FreeBSD. Fixes bug 15151; bugfix
16539 o Minor bugfixes (testing):
16540 - Fix endianness issues in unit test for resolve_my_address() to
16541 have it pass on big endian systems. Fixes bug 14980; bugfix on
16543 - Avoid a side-effect in a tor_assert() in the unit tests. Fixes bug
16544 15188; bugfix on 0.1.2.3-alpha. Patch from Tom van der Woerdt.
16545 - When running the new 'make test-stem' target, use the configured
16546 python binary. Fixes bug 15037; bugfix on 0.2.6.3-alpha. Patch
16547 from "cypherpunks".
16548 - When running the zero-length-keys tests, do not use the default
16549 torrc file. Fixes bug 15033; bugfix on 0.2.6.3-alpha. Reported
16552 o Directory authority IP change:
16553 - The directory authority Faravahar has a new IP address. This
16554 closes ticket 14487.
16557 - Remove some lingering dead code that once supported mempools.
16558 Mempools were disabled by default in 0.2.5, and removed entirely
16559 in 0.2.6.3-alpha. Closes more of ticket 14848; patch
16563 Changes in version 0.2.6.3-alpha - 2015-02-19
16564 Tor 0.2.6.3-alpha is the third (and hopefully final) alpha release in
16565 the 0.2.6.x series. It introduces support for more kinds of sockets,
16566 makes it harder to accidentally run an exit, improves our
16567 multithreading backend, incorporates several fixes for the
16568 AutomapHostsOnResolve option, and fixes numerous other bugs besides.
16570 If no major regressions or security holes are found in this version,
16571 the next version will be a release candidate.
16573 o Deprecated versions:
16574 - Tor relays older than 0.2.4.18-rc are no longer allowed to
16575 advertise themselves on the network. Closes ticket 13555.
16577 o Major features (security, unix domain sockets):
16578 - Allow SocksPort to be an AF_UNIX Unix Domain Socket. Now high risk
16579 applications can reach Tor without having to create AF_INET or
16580 AF_INET6 sockets, meaning they can completely disable their
16581 ability to make non-Tor network connections. To create a socket of
16582 this type, use "SocksPort unix:/path/to/socket". Implements
16584 - Support mapping hidden service virtual ports to AF_UNIX sockets.
16585 The syntax is "HiddenServicePort 80 unix:/path/to/socket".
16586 Implements ticket 11485.
16588 o Major features (changed defaults):
16589 - Prevent relay operators from unintentionally running exits: When a
16590 relay is configured as an exit node, we now warn the user unless
16591 the "ExitRelay" option is set to 1. We warn even more loudly if
16592 the relay is configured with the default exit policy, since this
16593 can indicate accidental misconfiguration. Setting "ExitRelay 0"
16594 stops Tor from running as an exit relay. Closes ticket 10067.
16596 o Major features (directory system):
16597 - When downloading server- or microdescriptors from a directory
16598 server, we no longer launch multiple simultaneous requests to the
16599 same server. This reduces load on the directory servers,
16600 especially when directory guards are in use. Closes ticket 9969.
16601 - When downloading server- or microdescriptors over a tunneled
16602 connection, do not limit the length of our requests to what the
16603 Squid proxy is willing to handle. Part of ticket 9969.
16604 - Authorities can now vote on the correct digests and latest
16605 versions for different software packages. This allows packages
16606 that include Tor to use the Tor authority system as a way to get
16607 notified of updates and their correct digests. Implements proposal
16608 227. Closes ticket 10395.
16610 o Major features (guards):
16611 - Introduce the Guardfraction feature to improves load balancing on
16612 guard nodes. Specifically, it aims to reduce the traffic gap that
16613 guard nodes experience when they first get the Guard flag. This is
16614 a required step if we want to increase the guard lifetime to 9
16615 months or greater. Closes ticket 9321.
16617 o Major features (performance):
16618 - Make the CPU worker implementation more efficient by avoiding the
16619 kernel and lengthening pipelines. The original implementation used
16620 sockets to transfer data from the main thread to the workers, and
16621 didn't allow any thread to be assigned more than a single piece of
16622 work at once. The new implementation avoids communications
16623 overhead by making requests in shared memory, avoiding kernel IO
16624 where possible, and keeping more requests in flight at once.
16625 Implements ticket 9682.
16627 o Major features (relay):
16628 - Raise the minimum acceptable configured bandwidth rate for bridges
16629 to 50 KiB/sec and for relays to 75 KiB/sec. (The old values were
16630 20 KiB/sec.) Closes ticket 13822.
16632 o Major bugfixes (exit node stability):
16633 - Fix an assertion failure that could occur under high DNS load.
16634 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
16635 diagnosed and fixed by "cypherpunks".
16637 o Major bugfixes (mixed relay-client operation):
16638 - When running as a relay and client at the same time (not
16639 recommended), if we decide not to use a new guard because we want
16640 to retry older guards, only close the locally-originating circuits
16641 passing through that guard. Previously we would close all the
16642 circuits through that guard. Fixes bug 9819; bugfix on
16643 0.2.1.1-alpha. Reported by "skruffy".
16645 o Minor features (build):
16646 - New --disable-system-torrc compile-time option to prevent Tor from
16647 looking for the system-wide torrc or torrc-defaults files.
16648 Resolves ticket 13037.
16650 o Minor features (controller):
16651 - Include SOCKS_USERNAME and SOCKS_PASSWORD values in controller
16652 events so controllers can observe circuit isolation inputs. Closes
16654 - ControlPort now supports the unix:/path/to/socket syntax as an
16655 alternative to the ControlSocket option, for consistency with
16656 SocksPort and HiddenServicePort. Closes ticket 14451.
16657 - New "GETINFO bw-event-cache" to get information about recent
16658 bandwidth events. Closes ticket 14128. Useful for controllers to
16659 get recent bandwidth history after the fix for ticket 13988.
16661 o Minor features (Denial of service resistance):
16662 - Count the total number of bytes used storing hidden service
16663 descriptors against the value of MaxMemInQueues. If we're low on
16664 memory, and more than 20% of our memory is used holding hidden
16665 service descriptors, free them until no more than 10% of our
16666 memory holds hidden service descriptors. Free the least recently
16667 fetched descriptors first. Resolves ticket 13806.
16668 - When we have recently been under memory pressure (over 3/4 of
16669 MaxMemInQueues is allocated), then allocate smaller zlib objects
16670 for small requests. Closes ticket 11791.
16672 o Minor features (geoip):
16673 - Update geoip and geoip6 files to the January 7 2015 Maxmind
16674 GeoLite2 Country database.
16676 o Minor features (guard nodes):
16677 - Reduce the time delay before saving guard status to disk from 10
16678 minutes to 30 seconds (or from one hour to 10 minutes if
16679 AvoidDiskWrites is set). Closes ticket 12485.
16681 o Minor features (hidden service):
16682 - Make Sybil attacks against hidden services harder by changing the
16683 minimum time required to get the HSDir flag from 25 hours up to 96
16684 hours. Addresses ticket 14149.
16685 - New option "HiddenServiceAllowUnknownPorts" to allow hidden
16686 services to disable the anti-scanning feature introduced in
16687 0.2.6.2-alpha. With this option not set, a connection to an
16688 unlisted port closes the circuit. With this option set, only a
16689 RELAY_DONE cell is sent. Closes ticket 14084.
16691 o Minor features (interface):
16692 - Implement "-f -" command-line option to read torrc configuration
16693 from standard input, if you don't want to store the torrc file in
16694 the file system. Implements feature 13865.
16696 o Minor features (logging):
16697 - Add a count of unique clients to the bridge heartbeat message.
16698 Resolves ticket 6852.
16699 - Suppress "router info incompatible with extra info" message when
16700 reading extrainfo documents from cache. (This message got loud
16701 around when we closed bug 9812 in 0.2.6.2-alpha.) Closes
16703 - Elevate hidden service authorized-client message from DEBUG to
16704 INFO. Closes ticket 14015.
16706 o Minor features (stability):
16707 - Add assertions in our hash-table iteration code to check for
16708 corrupted values that could cause infinite loops. Closes
16711 o Minor features (systemd):
16712 - Various improvements and modernizations in systemd hardening
16713 support. Closes ticket 13805. Patch from Craig Andrews.
16715 o Minor features (testing networks):
16716 - Drop the minimum RendPostPeriod on a testing network to 5 seconds,
16717 and the default on a testing network to 2 minutes. Drop the
16718 MIN_REND_INITIAL_POST_DELAY on a testing network to 5 seconds, but
16719 keep the default on a testing network at 30 seconds. This reduces
16720 HS bootstrap time to around 25 seconds. Also, change the default
16721 time in test-network.sh to match. Closes ticket 13401. Patch
16723 - Create TestingDirAuthVoteHSDir to correspond to
16724 TestingDirAuthVoteExit/Guard. Ensures that authorities vote the
16725 HSDir flag for the listed relays regardless of uptime or ORPort
16726 connectivity. Respects the value of VoteOnHidServDirectoriesV2.
16727 Partial implementation for ticket 14067. Patch by "teor".
16729 o Minor features (tor2web mode):
16730 - Introduce the config option Tor2webRendezvousPoints, which allows
16731 clients in Tor2webMode to select a specific Rendezvous Point to be
16732 used in HS circuits. This might allow better performance for
16733 Tor2Web nodes. Implements ticket 12844.
16735 o Minor bugfixes (client DNS):
16736 - Report the correct cached DNS expiration times on SOCKS port or in
16737 DNS replies. Previously, we would report everything as "never
16738 expires." Fixes bug 14193; bugfix on 0.2.3.17-beta.
16739 - Avoid a small memory leak when we find a cached answer for a
16740 reverse DNS lookup in a client-side DNS cache. (Remember, client-
16741 side DNS caching is off by default, and is not recommended.) Fixes
16742 bug 14259; bugfix on 0.2.0.1-alpha.
16744 o Minor bugfixes (client, automapping):
16745 - Avoid crashing on torrc lines for VirtualAddrNetworkIPv[4|6] when
16746 no value follows the option. Fixes bug 14142; bugfix on
16747 0.2.4.7-alpha. Patch by "teor".
16748 - Fix a memory leak when using AutomapHostsOnResolve. Fixes bug
16749 14195; bugfix on 0.1.0.1-rc.
16750 - Prevent changes to other options from removing the wildcard value
16751 "." from "AutomapHostsSuffixes". Fixes bug 12509; bugfix
16753 - Allow MapAddress and AutomapHostsOnResolve to work together when
16754 an address is mapped into another address type (like .onion) that
16755 must be automapped at resolve time. Fixes bug 7555; bugfix
16758 o Minor bugfixes (client, bridges):
16759 - When we are using bridges and we had a network connectivity
16760 problem, only retry connecting to our currently configured
16761 bridges, not all bridges we know about and remember using. Fixes
16762 bug 14216; bugfix on 0.2.2.17-alpha.
16764 o Minor bugfixes (client, IPv6):
16765 - Reject socks requests to literal IPv6 addresses when IPv6Traffic
16766 flag is not set; and not because the NoIPv4Traffic flag was set.
16767 Previously we'd looked at the NoIPv4Traffic flag for both types of
16768 literal addresses. Fixes bug 14280; bugfix on 0.2.4.7-alpha.
16770 o Minor bugfixes (compilation):
16771 - The address of an array in the middle of a structure will always
16772 be non-NULL. clang recognises this and complains. Disable the
16773 tautologous and redundant check to silence this warning. Fixes bug
16774 14001; bugfix on 0.2.1.2-alpha.
16775 - Avoid warnings when building with systemd 209 or later. Fixes bug
16776 14072; bugfix on 0.2.6.2-alpha. Patch from "h.venev".
16777 - Compile correctly with (unreleased) OpenSSL 1.1.0 headers.
16778 Addresses ticket 14188.
16779 - Build without warnings with the stock OpenSSL srtp.h header, which
16780 has a duplicate declaration of SSL_get_selected_srtp_profile().
16781 Fixes bug 14220; this is OpenSSL's bug, not ours.
16782 - Do not compile any code related to Tor2Web mode when Tor2Web mode
16783 is not enabled at compile time. Previously, this code was included
16784 in a disabled state. See discussion on ticket 12844.
16785 - Remove the --disable-threads configure option again. It was
16786 accidentally partially reintroduced in 29ac883606d6d. Fixes bug
16787 14819; bugfix on 0.2.6.2-alpha.
16789 o Minor bugfixes (controller):
16790 - Report "down" in response to the "GETINFO entry-guards" command
16791 when relays are down with an unreachable_since value. Previously,
16792 we would report "up". Fixes bug 14184; bugfix on 0.1.2.2-alpha.
16793 - Avoid crashing on a malformed EXTENDCIRCUIT command. Fixes bug
16794 14116; bugfix on 0.2.2.9-alpha.
16795 - Add a code for the END_CIRC_REASON_IP_NOW_REDUNDANT circuit close
16796 reason. Fixes bug 14207; bugfix on 0.2.6.2-alpha.
16798 o Minor bugfixes (directory authority):
16799 - Allow directory authorities to fetch more data from one another if
16800 they find themselves missing lots of votes. Previously, they had
16801 been bumping against the 10 MB queued data limit. Fixes bug 14261;
16802 bugfix on 0.1.2.5-alpha.
16803 - Do not attempt to download extrainfo documents which we will be
16804 unable to validate with a matching server descriptor. Fixes bug
16805 13762; bugfix on 0.2.0.1-alpha.
16806 - Fix a bug that was truncating AUTHDIR_NEWDESC events sent to the
16807 control port. Fixes bug 14953; bugfix on 0.2.0.1-alpha.
16808 - Enlarge the buffer to read bwauth generated files to avoid an
16809 issue when parsing the file in dirserv_read_measured_bandwidths().
16810 Fixes bug 14125; bugfix on 0.2.2.1-alpha.
16812 o Minor bugfixes (file handling):
16813 - Stop failing when key files are zero-length. Instead, generate new
16814 keys, and overwrite the empty key files. Fixes bug 13111; bugfix
16815 on all versions of Tor. Patch by "teor".
16816 - Stop generating a fresh .old RSA onion key file when the .old file
16817 is missing. Fixes part of 13111; bugfix on 0.0.6rc1.
16818 - Avoid overwriting .old key files with empty key files.
16819 - Skip loading zero-length extrainfo store, router store, stats,
16820 state, and key files.
16821 - Avoid crashing when trying to reload a torrc specified as a
16822 relative path with RunAsDaemon turned on. Fixes bug 13397; bugfix
16825 o Minor bugfixes (hidden services):
16826 - Close the introduction circuit when we have no more usable intro
16827 points, instead of waiting for it to time out. This also ensures
16828 that no follow-up HS descriptor fetch is triggered when the
16829 circuit eventually times out. Fixes bug 14224; bugfix on 0.0.6.
16830 - When fetching a hidden service descriptor for a down service that
16831 was recently up, do not keep refetching until we try the same
16832 replica twice in a row. Fixes bug 14219; bugfix on 0.2.0.10-alpha.
16833 - Successfully launch Tor with a nonexistent hidden service
16834 directory. Our fix for bug 13942 didn't catch this case. Fixes bug
16835 14106; bugfix on 0.2.6.2-alpha.
16837 o Minor bugfixes (logging):
16838 - Avoid crashing when there are more log domains than entries in
16839 domain_list. Bugfix on 0.2.3.1-alpha.
16840 - Add a string representation for LD_SCHED. Fixes bug 14740; bugfix
16842 - Don't log messages to stdout twice when starting up. Fixes bug
16843 13993; bugfix on 0.2.6.1-alpha.
16845 o Minor bugfixes (parsing):
16846 - Stop accepting milliseconds (or other junk) at the end of
16847 descriptor publication times. Fixes bug 9286; bugfix on 0.0.2pre25.
16848 - Support two-number and three-number version numbers correctly, in
16849 case we change the Tor versioning system in the future. Fixes bug
16850 13661; bugfix on 0.0.8pre1.
16852 o Minor bugfixes (path counting):
16853 - When deciding whether the consensus lists any exit nodes, count
16854 the number listed in the consensus, not the number we have
16855 descriptors for. Fixes part of bug 14918; bugfix on 0.2.6.2-alpha.
16856 - When deciding whether we have any exit nodes, only examine
16857 ExitNodes when the ExitNodes option is actually set. Fixes part of
16858 bug 14918; bugfix on 0.2.6.2-alpha.
16859 - Get rid of redundant and possibly scary warnings that we are
16860 missing directory information while we bootstrap. Fixes part of
16861 bug 14918; bugfix on 0.2.6.2-alpha.
16863 o Minor bugfixes (portability):
16864 - Fix the ioctl()-based network interface lookup code so that it
16865 will work on systems that have variable-length struct ifreq, for
16867 - Fix scheduler compilation on targets where char is unsigned. Fixes
16868 bug 14764; bugfix on 0.2.6.2-alpha. Reported by Christian Kujau.
16870 o Minor bugfixes (sandbox):
16871 - Allow glibc fatal errors to be sent to stderr before Tor exits.
16872 Previously, glibc would try to write them to /dev/tty, and the
16873 sandbox would trap the call and make Tor exit prematurely. Fixes
16874 bug 14759; bugfix on 0.2.5.1-alpha.
16876 o Minor bugfixes (shutdown):
16877 - When shutting down, always call event_del() on lingering read or
16878 write events before freeing them. Otherwise, we risk double-frees
16879 or read-after-frees in event_base_free(). Fixes bug 12985; bugfix
16882 o Minor bugfixes (small memory leaks):
16883 - Avoid leaking memory when using IPv6 virtual address mappings.
16884 Fixes bug 14123; bugfix on 0.2.4.7-alpha. Patch by Tom van
16887 o Minor bugfixes (statistics):
16888 - Increase period over which bandwidth observations are aggregated
16889 from 15 minutes to 4 hours. Fixes bug 13988; bugfix on 0.0.8pre1.
16891 o Minor bugfixes (systemd support):
16892 - Fix detection and operation of systemd watchdog. Fixes part of bug
16893 14141; bugfix on 0.2.6.2-alpha. Patch from Tomasz Torcz.
16894 - Run correctly under systemd with the RunAsDaemon option set. Fixes
16895 part of bug 14141; bugfix on 0.2.5.7-rc. Patch from Tomasz Torcz.
16896 - Inform the systemd supervisor about more changes in the Tor
16897 process status. Implements part of ticket 14141. Patch from
16899 - Cause the "--disable-systemd" option to actually disable systemd
16900 support. Fixes bug 14350; bugfix on 0.2.6.2-alpha. Patch
16903 o Minor bugfixes (TLS):
16904 - Check more thoroughly throughout the TLS code for possible
16905 unlogged TLS errors. Possible diagnostic or fix for bug 13319.
16907 o Minor bugfixes (transparent proxy):
16908 - Use getsockname, not getsockopt, to retrieve the address for a
16909 TPROXY-redirected connection. Fixes bug 13796; bugfix
16912 o Code simplification and refactoring:
16913 - Move fields related to isolating and configuring client ports into
16914 a shared structure. Previously, they were duplicated across
16915 port_cfg_t, listener_connection_t, and edge_connection_t. Failure
16916 to copy them correctly had been the cause of at least one bug in
16917 the past. Closes ticket 8546.
16918 - Refactor the get_interface_addresses_raw() doom-function into
16919 multiple smaller and simpler subfunctions. Cover the resulting
16920 subfunctions with unit-tests. Fixes a significant portion of
16922 - Remove workaround in dirserv_thinks_router_is_hs_dir() that was
16923 only for version <= 0.2.2.24 which is now deprecated. Closes
16925 - Remove a test for a long-defunct broken version-one
16929 - Adding section on OpenBSD to our TUNING document. Thanks to mmcc
16930 for writing the OpenBSD-specific tips. Resolves ticket 13702.
16931 - Make the tor-resolve documentation match its help string and its
16932 options. Resolves part of ticket 14325.
16933 - Log a more useful error message from tor-resolve when failing to
16934 look up a hidden service address. Resolves part of ticket 14325.
16936 o Downgraded warnings:
16937 - Don't warn when we've attempted to contact a relay using the wrong
16938 ntor onion key. Closes ticket 9635.
16940 o Removed features:
16941 - To avoid confusion with the "ExitRelay" option, "ExitNode" is no
16942 longer silently accepted as an alias for "ExitNodes".
16943 - The --enable-mempool and --enable-buf-freelists options, which
16944 were originally created to work around bad malloc implementations,
16945 no longer exist. They were off-by-default in 0.2.5. Closes
16949 - Make the checkdir/perms test complete successfully even if the
16950 global umask is not 022. Fixes bug 14215; bugfix on 0.2.6.2-alpha.
16951 - Test that tor does not fail when key files are zero-length. Check
16952 that tor generates new keys, and overwrites the empty key files.
16953 - Test that tor generates new keys when keys are missing
16954 (existing behavior).
16955 - Test that tor does not overwrite key files that already contain
16956 data (existing behavior). Tests bug 13111. Patch by "teor".
16957 - New "make test-stem" target to run stem integration tests.
16958 Requires that the "STEM_SOURCE_DIR" environment variable be set.
16959 Closes ticket 14107.
16960 - Make the test_cmdline_args.py script work correctly on Windows.
16961 Patch from Gisle Vanem.
16962 - Move the slower unit tests into a new "./src/test/test-slow"
16963 binary that can be run independently of the other tests. Closes
16965 - Avoid undefined behavior when sampling huge values from the
16966 Laplace distribution. This made unittests fail on Raspberry Pi.
16967 Bug found by Device. Fixes bug 14090; bugfix on 0.2.6.2-alpha.
16970 Changes in version 0.2.6.2-alpha - 2014-12-31
16971 Tor 0.2.6.2-alpha is the second alpha release in the 0.2.6.x series.
16972 It introduces a major new backend for deciding when to send cells on
16973 channels, which should lead down the road to big performance
16974 increases. It contains security and statistics features for better
16975 work on hidden services, and numerous bugfixes.
16977 This release contains many new unit tests, along with major
16978 performance improvements for running testing networks using Chutney.
16979 Thanks to a series of patches contributed by "teor", testing networks
16980 should now bootstrap in seconds, rather than minutes.
16982 o Major features (relay, infrastructure):
16983 - Complete revision of the code that relays use to decide which cell
16984 to send next. Formerly, we selected the best circuit to write on
16985 each channel, but we didn't select among channels in any
16986 sophisticated way. Now, we choose the best circuits globally from
16987 among those whose channels are ready to deliver traffic.
16989 This patch implements a new inter-cmux comparison API, a global
16990 high/low watermark mechanism and a global scheduler loop for
16991 transmission prioritization across all channels as well as among
16992 circuits on one channel. This schedule is currently tuned to
16993 (tolerantly) avoid making changes in network performance, but it
16994 should form the basis for major circuit performance increases in
16995 the future. Code by Andrea; tuning by Rob Jansen; implements
16998 o Major features (hidden services):
16999 - Make HS port scanning more difficult by immediately closing the
17000 circuit when a user attempts to connect to a nonexistent port.
17001 Closes ticket 13667.
17002 - Add a HiddenServiceStatistics option that allows Tor relays to
17003 gather and publish statistics about the overall size and volume of
17004 hidden service usage. Specifically, when this option is turned on,
17005 an HSDir will publish an approximate number of hidden services
17006 that have published descriptors to it the past 24 hours. Also, if
17007 a relay has acted as a hidden service rendezvous point, it will
17008 publish the approximate amount of rendezvous cells it has relayed
17009 the past 24 hours. The statistics themselves are obfuscated so
17010 that the exact values cannot be derived. For more details see
17011 proposal 238, "Better hidden service stats from Tor relays". This
17012 feature is currently disabled by default. Implements feature 13192.
17014 o Major bugfixes (client, automap):
17015 - Repair automapping with IPv6 addresses. This automapping should
17016 have worked previously, but one piece of debugging code that we
17017 inserted to detect a regression actually caused the regression to
17018 manifest itself again. Fixes bug 13811 and bug 12831; bugfix on
17019 0.2.4.7-alpha. Diagnosed and fixed by Francisco Blas
17022 o Major bugfixes (hidden services):
17023 - When closing an introduction circuit that was opened in parallel
17024 with others, don't mark the introduction point as unreachable.
17025 Previously, the first successful connection to an introduction
17026 point would make the other introduction points get marked as
17027 having timed out. Fixes bug 13698; bugfix on 0.0.6rc2.
17029 o Directory authority changes:
17030 - Remove turtles as a directory authority.
17031 - Add longclaw as a new (v3) directory authority. This implements
17032 ticket 13296. This keeps the directory authority count at 9.
17034 o Major removed features:
17035 - Tor clients no longer support connecting to hidden services
17036 running on Tor 0.2.2.x and earlier; the Support022HiddenServices
17037 option has been removed. (There shouldn't be any hidden services
17038 running these versions on the network.) Closes ticket 7803.
17040 o Minor features (client):
17041 - Validate hostnames in SOCKS5 requests more strictly. If SafeSocks
17042 is enabled, reject requests with IP addresses as hostnames.
17043 Resolves ticket 13315.
17045 o Minor features (controller):
17046 - Add a "SIGNAL HEARTBEAT" controller command that tells Tor to
17047 write an unscheduled heartbeat message to the log. Implements
17050 o Minor features (geoip):
17051 - Update geoip and geoip6 to the November 15 2014 Maxmind GeoLite2
17054 o Minor features (hidden services):
17055 - When re-enabling the network, don't try to build introduction
17056 circuits until we have successfully built a circuit. This makes
17057 hidden services come up faster when the network is re-enabled.
17058 Patch from "akwizgran". Closes ticket 13447.
17059 - When we fail to retrieve a hidden service descriptor, send the
17060 controller an "HS_DESC FAILED" controller event. Implements
17062 - New HiddenServiceDirGroupReadable option to cause hidden service
17063 directories and hostname files to be created group-readable. Patch
17064 from "anon", David Stainton, and "meejah". Closes ticket 11291.
17066 o Minor features (systemd):
17067 - Where supported, when running with systemd, report successful
17068 startup to systemd. Part of ticket 11016. Patch by Michael Scherer.
17069 - When running with systemd, support systemd watchdog messages. Part
17070 of ticket 11016. Patch by Michael Scherer.
17072 o Minor features (transparent proxy):
17073 - Update the transparent proxy option checks to allow for both ipfw
17074 and pf on OS X. Closes ticket 14002.
17075 - Use the correct option when using IPv6 with transparent proxy
17076 support on Linux. Resolves 13808. Patch by Francisco Blas
17079 o Minor bugfixes (preventative security, C safety):
17080 - When reading a hexadecimal, base-32, or base-64 encoded value from
17081 a string, always overwrite the whole output buffer. This prevents
17082 some bugs where we would look at (but fortunately, not reveal)
17083 uninitialized memory on the stack. Fixes bug 14013; bugfix on all
17085 - Clear all memory targeted by tor_addr_{to,from}_sockaddr(), not
17086 just the part that's used. This makes it harder for data leak bugs
17087 to occur in the event of other programming failures. Resolves
17090 o Minor bugfixes (client, microdescriptors):
17091 - Use a full 256 bits of the SHA256 digest of a microdescriptor when
17092 computing which microdescriptors to download. This keeps us from
17093 erroneous download behavior if two microdescriptor digests ever
17094 have the same first 160 bits. Fixes part of bug 13399; bugfix
17096 - Reset a router's status if its microdescriptor digest changes,
17097 even if the first 160 bits remain the same. Fixes part of bug
17098 13399; bugfix on 0.2.3.1-alpha.
17100 o Minor bugfixes (compilation):
17101 - Silence clang warnings under --enable-expensive-hardening,
17102 including implicit truncation of 64 bit values to 32 bit, const
17103 char assignment to self, tautological compare, and additional
17104 parentheses around equality tests. Fixes bug 13577; bugfix
17106 - Fix a clang warning about checking whether an address in the
17107 middle of a structure is NULL. Fixes bug 14001; bugfix
17110 o Minor bugfixes (hidden services):
17111 - Correctly send a controller event when we find that a rendezvous
17112 circuit has finished. Fixes bug 13936; bugfix on 0.1.1.5-alpha.
17113 - Pre-check directory permissions for new hidden-services to avoid
17114 at least one case of "Bug: Acting on config options left us in a
17115 broken state. Dying." Fixes bug 13942; bugfix on 0.0.6pre1.
17116 - When adding a new hidden service (for example, via SETCONF), Tor
17117 no longer congratulates the user for running a relay. Fixes bug
17118 13941; bugfix on 0.2.6.1-alpha.
17119 - When fetching hidden service descriptors, we now check not only
17120 for whether we got the hidden service we had in mind, but also
17121 whether we got the particular descriptors we wanted. This prevents
17122 a class of inefficient but annoying DoS attacks by hidden service
17123 directories. Fixes bug 13214; bugfix on 0.2.1.6-alpha. Reported
17126 o Minor bugfixes (Linux seccomp2 sandbox):
17127 - Make transparent proxy support work along with the seccomp2
17128 sandbox. Fixes part of bug 13808; bugfix on 0.2.5.1-alpha. Patch
17129 by Francisco Blas Izquierdo Riera.
17130 - Fix a memory leak in tor-resolve when running with the sandbox
17131 enabled. Fixes bug 14050; bugfix on 0.2.5.9-rc.
17133 o Minor bugfixes (logging):
17134 - Downgrade warnings about RSA signature failures to info log level.
17135 Emit a warning when an extra info document is found incompatible
17136 with a corresponding router descriptor. Fixes bug 9812; bugfix
17138 - Make connection_ap_handshake_attach_circuit() log the circuit ID
17139 correctly. Fixes bug 13701; bugfix on 0.0.6.
17141 o Minor bugfixes (misc):
17142 - Stop allowing invalid address patterns like "*/24" that contain
17143 both a wildcard address and a bit prefix length. This affects all
17144 our address-range parsing code. Fixes bug 7484; bugfix
17147 o Minor bugfixes (testing networks, fast startup):
17148 - Allow Tor to build circuits using a consensus with no exits. If
17149 the consensus has no exits (typical of a bootstrapping test
17150 network), allow Tor to build circuits once enough descriptors have
17151 been downloaded. This assists in bootstrapping a testing Tor
17152 network. Fixes bug 13718; bugfix on 0.2.4.10-alpha. Patch
17154 - When V3AuthVotingInterval is low, give a lower If-Modified-Since
17155 header to directory servers. This allows us to obtain consensuses
17156 promptly when the consensus interval is very short. This assists
17157 in bootstrapping a testing Tor network. Fixes parts of bugs 13718
17158 and 13963; bugfix on 0.2.0.3-alpha. Patch by "teor".
17159 - Stop assuming that private addresses are local when checking
17160 reachability in a TestingTorNetwork. Instead, when testing, assume
17161 all OR connections are remote. (This is necessary due to many test
17162 scenarios running all relays on localhost.) This assists in
17163 bootstrapping a testing Tor network. Fixes bug 13924; bugfix on
17164 0.1.0.1-rc. Patch by "teor".
17165 - Avoid building exit circuits from a consensus with no exits. Now
17166 thanks to our fix for 13718, we accept a no-exit network as not
17167 wholly lost, but we need to remember not to try to build exit
17168 circuits on it. Closes ticket 13814; patch by "teor".
17169 - Stop requiring exits to have non-zero bandwithcapacity in a
17170 TestingTorNetwork. Instead, when TestingMinExitFlagThreshold is 0,
17171 ignore exit bandwidthcapacity. This assists in bootstrapping a
17172 testing Tor network. Fixes parts of bugs 13718 and 13839; bugfix
17173 on 0.2.0.3-alpha. Patch by "teor".
17174 - Add "internal" to some bootstrap statuses when no exits are
17175 available. If the consensus does not contain Exits, Tor will only
17176 build internal circuits. In this case, relevant statuses will
17177 contain the word "internal" as indicated in the Tor control-
17178 spec.txt. When bootstrap completes, Tor will be ready to build
17179 internal circuits. If a future consensus contains Exits, exit
17180 circuits may become available. Fixes part of bug 13718; bugfix on
17181 0.2.4.10-alpha. Patch by "teor".
17182 - Decrease minimum consensus interval to 10 seconds when
17183 TestingTorNetwork is set, or 5 seconds for the first consensus.
17184 Fix assumptions throughout the code that assume larger intervals.
17185 Fixes bugs 13718 and 13823; bugfix on 0.2.0.3-alpha. Patch
17187 - Avoid excluding guards from path building in minimal test
17188 networks, when we're in a test network and excluding guards would
17189 exclude all relays. This typically occurs in incredibly small tor
17190 networks, and those using "TestingAuthVoteGuard *". Fixes part of
17191 bug 13718; bugfix on 0.1.1.11-alpha. Patch by "teor".
17193 o Code simplification and refactoring:
17194 - Stop using can_complete_circuits as a global variable; access it
17195 with a function instead.
17196 - Avoid using operators directly as macro arguments: this lets us
17197 apply coccinelle transformations to our codebase more directly.
17198 Closes ticket 13172.
17199 - Combine the functions used to parse ClientTransportPlugin and
17200 ServerTransportPlugin into a single function. Closes ticket 6456.
17201 - Add inline functions and convenience macros for inspecting channel
17202 state. Refactor the code to use convenience macros instead of
17203 checking channel state directly. Fixes issue 7356.
17204 - Document all members of was_router_added_t and rename
17205 ROUTER_WAS_NOT_NEW to ROUTER_IS_ALREADY_KNOWN to make it less
17206 confusable with ROUTER_WAS_TOO_OLD. Fixes issue 13644.
17207 - In connection_exit_begin_conn(), use END_CIRC_REASON_TORPROTOCOL
17208 constant instead of hardcoded value. Fixes issue 13840.
17209 - Refactor our generic strmap and digestmap types into a single
17210 implementation, so that we can add a new digest256map
17214 - Document the bridge-authority-only 'networkstatus-bridges' file.
17215 Closes ticket 13713; patch from "tom".
17216 - Fix typo in PredictedPortsRelevanceTime option description in
17217 manpage. Resolves issue 13707.
17218 - Stop suggesting that users specify relays by nickname: it isn't a
17219 good idea. Also, properly cross-reference how to specify relays in
17220 all parts of manual documenting options that take a list of
17221 relays. Closes ticket 13381.
17222 - Clarify the HiddenServiceDir option description in manpage to make
17223 it clear that relative paths are taken with respect to the current
17224 working directory. Also clarify that this behavior is not
17225 guaranteed to remain indefinitely. Fixes issue 13913.
17228 - New tests for many parts of channel, relay, and circuitmux
17229 functionality. Code by Andrea; part of 9262.
17230 - New tests for parse_transport_line(). Part of ticket 6456.
17231 - In the unit tests, use chgrp() to change the group of the unit
17232 test temporary directory to the current user, so that the sticky
17233 bit doesn't interfere with tests that check directory groups.
17235 - Add unit tests for resolve_my_addr(). Part of ticket 12376; patch
17239 Changes in version 0.2.6.1-alpha - 2014-10-30
17240 Tor 0.2.6.1-alpha is the first release in the Tor 0.2.6.x series. It
17241 includes numerous code cleanups and new tests, and fixes a large
17242 number of annoying bugs. Out-of-memory conditions are handled better
17243 than in 0.2.5, pluggable transports have improved proxy support, and
17244 clients now use optimistic data for contacting hidden services. Also,
17245 we are now more robust to changes in what we consider a parseable
17246 directory object, so that tightening restrictions does not have a risk
17247 of introducing infinite download loops.
17249 This is the first alpha release in a new series, so expect there to be
17250 bugs. Users who would rather test out a more stable branch should stay
17251 with 0.2.5.x for now.
17253 o New compiler and system requirements:
17254 - Tor 0.2.6.x requires that your compiler support more of the C99
17255 language standard than before. The 'configure' script now detects
17256 whether your compiler supports C99 mid-block declarations and
17257 designated initializers. If it does not, Tor will not compile.
17259 We may revisit this requirement if it turns out that a significant
17260 number of people need to build Tor with compilers that don't
17261 bother implementing a 15-year-old standard. Closes ticket 13233.
17262 - Tor no longer supports systems without threading support. When we
17263 began working on Tor, there were several systems that didn't have
17264 threads, or where the thread support wasn't able to run the
17265 threads of a single process on multiple CPUs. That no longer
17266 holds: every system where Tor needs to run well now has threading
17267 support. Resolves ticket 12439.
17269 o Removed platform support:
17270 - We no longer include special code to build on Windows CE; as far
17271 as we know, nobody has used Tor on Windows CE in a very long time.
17272 Closes ticket 11446.
17274 o Major features (bridges):
17275 - Expose the outgoing upstream HTTP/SOCKS proxy to pluggable
17276 transports if they are configured via the "TOR_PT_PROXY"
17277 environment variable. Implements proposal 232. Resolves
17280 o Major features (client performance, hidden services):
17281 - Allow clients to use optimistic data when connecting to a hidden
17282 service, which should remove a round-trip from hidden service
17283 initialization. See proposal 181 for details. Implements
17286 o Major features (directory system):
17287 - Upon receiving an unparseable directory object, if its digest
17288 matches what we expected, then don't try to download it again.
17289 Previously, when we got a descriptor we didn't like, we would keep
17290 trying to download it over and over. Closes ticket 11243.
17292 o Major features (sample torrc):
17293 - Add a new, infrequently-changed "torrc.minimal". This file is
17294 similar to torrc.sample, but it will change as infrequently as
17295 possible, for the benefit of users whose systems prompt them for
17296 intervention whenever a default configuration file is changed.
17297 Making this change allows us to update torrc.sample to be a more
17298 generally useful "sample torrc".
17300 o Major bugfixes (directory authorities):
17301 - Do not assign the HSDir flag to relays if they are not Valid, or
17302 currently hibernating. Fixes 12573; bugfix on 0.2.0.10-alpha.
17304 o Major bugfixes (directory bandwidth performance):
17305 - Don't flush the zlib buffer aggressively when compressing
17306 directory information for clients. This should save about 7% of
17307 the bandwidth currently used for compressed descriptors and
17308 microdescriptors. Fixes bug 11787; bugfix on 0.1.1.23.
17310 o Minor features (security, memory wiping):
17311 - Ensure we securely wipe keys from memory after
17312 crypto_digest_get_digest and init_curve25519_keypair_from_file
17313 have finished using them. Resolves ticket 13477.
17315 o Minor features (security, out-of-memory handling):
17316 - When handling an out-of-memory condition, allocate less memory for
17317 temporary data structures. Fixes issue 10115.
17318 - When handling an out-of-memory condition, consider more types of
17319 buffers, including those on directory connections, and zlib
17320 buffers. Resolves ticket 11792.
17323 - When identity keypair is generated for first time, log a
17324 congratulatory message that links to the new relay lifecycle
17325 document. Implements feature 10427.
17327 o Minor features (client):
17328 - Clients are now willing to send optimistic data (before they
17329 receive a 'connected' cell) to relays of any version. (Relays
17330 without support for optimistic data are no longer supported on the
17331 Tor network.) Resolves ticket 13153.
17333 o Minor features (directory authorities):
17334 - Don't list relays with a bandwidth estimate of 0 in the consensus.
17335 Implements a feature proposed during discussion of bug 13000.
17336 - In tor-gencert, report an error if the user provides the same
17337 argument more than once.
17338 - If a directory authority can't find a best consensus method in the
17339 votes that it holds, it now falls back to its favorite consensus
17340 method. Previously, it fell back to method 1. Neither of these is
17341 likely to get enough signatures, but "fall back to favorite"
17342 doesn't require us to maintain support an obsolete consensus
17343 method. Implements part of proposal 215.
17345 o Minor features (logging):
17346 - On Unix-like systems, you can now use named pipes as the target of
17347 the Log option, and other options that try to append to files.
17348 Closes ticket 12061. Patch from "carlo von lynX".
17349 - When opening a log file at startup, send it every log message that
17350 we generated between startup and opening it. Previously, log
17351 messages that were generated before opening the log file were only
17352 logged to stdout. Closes ticket 6938.
17353 - Add a TruncateLogFile option to overwrite logs instead of
17354 appending to them. Closes ticket 5583.
17356 o Minor features (portability, Solaris):
17357 - Threads are no longer disabled by default on Solaris; we believe
17358 that the versions of Solaris with broken threading support are all
17359 obsolete by now. Resolves ticket 9495.
17361 o Minor features (relay):
17362 - Re-check our address after we detect a changed IP address from
17363 getsockname(). This ensures that the controller command "GETINFO
17364 address" will report the correct value. Resolves ticket 11582.
17366 - A new AccountingRule option lets Relays set whether they'd like
17367 AccountingMax to be applied separately to inbound and outbound
17368 traffic, or applied to the sum of inbound and outbound traffic.
17369 Resolves ticket 961. Patch by "chobe".
17371 o Minor features (testing networks):
17372 - Add the TestingDirAuthVoteExit option, which lists nodes to assign
17373 the "Exit" flag regardless of their uptime, bandwidth, or exit
17374 policy. TestingTorNetwork must be set for this option to have any
17375 effect. Previously, authorities would take up to 35 minutes to
17376 give nodes the Exit flag in a test network. Partially implements
17379 o Minor features (validation):
17380 - Check all date/time values passed to tor_timegm and
17381 parse_rfc1123_time for validity, taking leap years into account.
17382 Improves HTTP header validation. Implemented with bug 13476.
17383 - In correct_tm(), limit the range of values returned by system
17384 localtime(_r) and gmtime(_r) to be between the years 1 and 8099.
17385 This means we don't have to deal with negative or too large dates,
17386 even if a clock is wrong. Otherwise we might fail to read a file
17387 written by us which includes such a date. Fixes bug 13476.
17389 o Minor bugfixes (bridge clients):
17390 - When configured to use a bridge without an identity digest (not
17391 recommended), avoid launching an extra channel to it when
17392 bootstrapping. Fixes bug 7733; bugfix on 0.2.4.4-alpha.
17394 o Minor bugfixes (bridges):
17395 - When DisableNetwork is set, do not launch pluggable transport
17396 plugins, and if any are running, terminate them. Fixes bug 13213;
17397 bugfix on 0.2.3.6-alpha.
17399 o Minor bugfixes (C correctness):
17400 - Fix several instances of possible integer overflow/underflow/NaN.
17401 Fixes bug 13104; bugfix on 0.2.3.1-alpha and later. Patches
17403 - In circuit_build_times_calculate_timeout() in circuitstats.c,
17404 avoid dividing by zero in the pareto calculations. This traps
17405 under clang's "undefined-trap" sanitizer. Fixes bug 13290; bugfix
17407 - Fix an integer overflow in format_time_interval(). Fixes bug
17408 13393; bugfix on 0.2.0.10-alpha.
17409 - Set the correct day of year value when the system's localtime(_r)
17410 or gmtime(_r) functions fail to set struct tm. Not externally
17411 visible. Fixes bug 13476; bugfix on 0.0.2pre14.
17412 - Avoid unlikely signed integer overflow in tor_timegm on systems
17413 with 32-bit time_t. Fixes bug 13476; bugfix on 0.0.2pre14.
17415 o Minor bugfixes (client):
17416 - Fix smartlist_choose_node_by_bandwidth() so that relays with the
17417 BadExit flag are not considered worthy candidates. Fixes bug
17418 13066; bugfix on 0.1.2.3-alpha.
17419 - Use the consensus schedule for downloading consensuses, and not
17420 the generic schedule. Fixes bug 11679; bugfix on 0.2.2.6-alpha.
17421 - Handle unsupported or malformed SOCKS5 requests properly by
17422 responding with the appropriate error message before closing the
17423 connection. Fixes bugs 12971 and 13314; bugfix on 0.0.2pre13.
17425 o Minor bugfixes (client, torrc):
17426 - Stop modifying the value of our DirReqStatistics torrc option just
17427 because we're not a bridge or relay. This bug was causing Tor
17428 Browser users to write "DirReqStatistics 0" in their torrc files
17429 as if they had chosen to change the config. Fixes bug 4244; bugfix
17431 - When GeoIPExcludeUnknown is enabled, do not incorrectly decide
17432 that our options have changed every time we SIGHUP. Fixes bug
17433 9801; bugfix on 0.2.4.10-alpha. Patch from "qwerty1".
17435 o Minor bugfixes (controller):
17436 - Return an error when the second or later arguments of the
17437 "setevents" controller command are invalid events. Previously we
17438 would return success while silently skipping invalid events. Fixes
17439 bug 13205; bugfix on 0.2.3.2-alpha. Reported by "fpxnns".
17441 o Minor bugfixes (directory system):
17442 - Always believe that v3 directory authorities serve extra-info
17443 documents, whether they advertise "caches-extra-info" or not.
17444 Fixes part of bug 11683; bugfix on 0.2.0.1-alpha.
17445 - When running as a v3 directory authority, advertise that you serve
17446 extra-info documents so that clients who want them can find them
17447 from you too. Fixes part of bug 11683; bugfix on 0.2.0.1-alpha.
17448 - Check the BRIDGE_DIRINFO flag bitwise rather than using equality.
17449 Previously, directories offering BRIDGE_DIRINFO and some other
17450 flag (i.e. microdescriptors or extrainfo) would be ignored when
17451 looking for bridges. Partially fixes bug 13163; bugfix
17454 o Minor bugfixes (networking):
17455 - Check for orconns and use connection_or_close_for_error() rather
17456 than connection_mark_for_close() directly in the getsockopt()
17457 failure case of connection_handle_write_impl(). Fixes bug 11302;
17458 bugfix on 0.2.4.4-alpha.
17460 o Minor bugfixes (relay):
17461 - When generating our family list, remove spaces from around the
17462 entries. Fixes bug 12728; bugfix on 0.2.1.7-alpha.
17463 - If our previous bandwidth estimate was 0 bytes, allow publishing a
17464 new relay descriptor immediately. Fixes bug 13000; bugfix
17467 o Minor bugfixes (testing networks):
17468 - Fix TestingDirAuthVoteGuard to properly give out Guard flags in a
17469 testing network. Fixes bug 13064; bugfix on 0.2.5.2-alpha.
17470 - Stop using the default authorities in networks which provide both
17471 AlternateDirAuthority and AlternateBridgeAuthority. Partially
17472 fixes bug 13163; bugfix on 0.2.0.13-alpha.
17474 o Minor bugfixes (testing):
17475 - Stop spawn test failures due to a race condition between the
17476 SIGCHLD handler updating the process status, and the test reading
17477 it. Fixes bug 13291; bugfix on 0.2.3.3-alpha.
17479 o Minor bugfixes (testing, Windows):
17480 - Avoid passing an extra backslash when creating a temporary
17481 directory for running the unit tests on Windows. Fixes bug 12392;
17482 bugfix on 0.2.2.25-alpha. Patch from Gisle Vanem.
17484 o Minor bugfixes (windows):
17485 - Remove code to special-case handling of NTE_BAD_KEYSET when
17486 acquiring windows CryptoAPI context. This error can't actually
17487 occur for the parameters we're providing. Fixes bug 10816; bugfix
17490 o Minor bugfixes (zlib):
17491 - Avoid truncating a zlib stream when trying to finalize it with an
17492 empty output buffer. Fixes bug 11824; bugfix on 0.1.1.23.
17495 - Allow our configure script to build correctly with autoconf 2.62
17496 again. Fixes bug 12693; bugfix on 0.2.5.2-alpha.
17497 - Improve the error message from ./configure to make it clear that
17498 when asciidoc has not been found, the user will have to either add
17499 --disable-asciidoc argument or install asciidoc. Resolves
17502 o Code simplification and refactoring:
17503 - Change the entry_is_live() function to take named bitfield
17504 elements instead of an unnamed list of booleans. Closes
17506 - Refactor and unit-test entry_is_time_to_retry() in entrynodes.c.
17507 Resolves ticket 12205.
17508 - Use calloc and reallocarray functions instead of multiply-
17509 then-malloc. This makes it less likely for us to fall victim to an
17510 integer overflow attack when allocating. Resolves ticket 12855.
17511 - Use the standard macro name SIZE_MAX, instead of our
17513 - Document usage of the NO_DIRINFO and ALL_DIRINFO flags clearly in
17514 functions which take them as arguments. Replace 0 with NO_DIRINFO
17515 in a function call for clarity. Seeks to prevent future issues
17517 - Avoid 4 null pointer errors under clang static analysis by using
17518 tor_assert() to prove that the pointers aren't null. Fixes
17520 - Rework the API of policies_parse_exit_policy() to use a bitmask to
17521 represent parsing options, instead of a confusing mess of
17522 booleans. Resolves ticket 8197.
17523 - Introduce a helper function to parse ExitPolicy in
17524 or_options_t structure.
17527 - Add a doc/TUNING document with tips for handling large numbers of
17528 TCP connections when running busy Tor relay. Update the warning
17529 message to point to this file when running out of sockets
17530 operating system is allowing to use simultaneously. Resolves
17533 o Removed features:
17534 - We no longer remind the user about configuration options that have
17535 been obsolete since 0.2.3.x or earlier. Patch by Adrien Bak.
17536 - Remove our old, non-weighted bandwidth-based node selection code.
17537 Previously, we used it as a fallback when we couldn't perform
17538 weighted bandwidth-based node selection. But that would only
17539 happen in the cases where we had no consensus, or when we had a
17540 consensus generated by buggy or ancient directory authorities. In
17541 either case, it's better to use the more modern, better maintained
17542 algorithm, with reasonable defaults for the weights. Closes
17544 - Remove the --disable-curve25519 configure option. Relays and
17545 clients now are required to support curve25519 and the
17547 - The old "StrictEntryNodes" and "StrictExitNodes" options, which
17548 used to be deprecated synonyms for "StrictNodes", are now marked
17549 obsolete. Resolves ticket 12226.
17550 - Clients don't understand the BadDirectory flag in the consensus
17551 anymore, and ignore it.
17554 - Refactor the function that chooses guard nodes so that it can more
17555 easily be tested; write some tests for it.
17556 - Fix and re-enable the fgets_eagain unit test. Fixes bug 12503;
17557 bugfix on 0.2.3.1-alpha. Patch from "cypherpunks."
17558 - Create unit tests for format_time_interval(). With bug 13393.
17559 - Add unit tests for tor_timegm signed overflow, tor_timegm and
17560 parse_rfc1123_time validity checks, correct_tm year clamping. Unit
17561 tests (visible) fixes in bug 13476.
17562 - Add a "coverage-html" make target to generate HTML-visualized
17563 coverage results when building with --enable-coverage. (Requires
17564 lcov.) Patch from Kevin Murray.
17565 - Enable the backtrace handler (where supported) when running the
17567 - Revise all unit tests that used the legacy test_* macros to
17568 instead use the recommended tt_* macros. This patch was generated
17569 with coccinelle, to avoid manual errors. Closes ticket 13119.
17571 o Distribution (systemd):
17572 - systemd unit file: only allow tor to write to /var/lib/tor and
17573 /var/log/tor. The rest of the filesystem is accessible for reading
17574 only. Patch by intrigeri; resolves ticket 12751.
17575 - systemd unit file: ensure that the process and all its children
17576 can never gain new privileges. Patch by intrigeri; resolves
17578 - systemd unit file: set up /var/run/tor as writable for the Tor
17579 service. Patch by intrigeri; resolves ticket 13196.
17581 o Removed features (directory authorities):
17582 - Remove code that prevented authorities from listing Tor relays
17583 affected by CVE-2011-2769 as guards. These relays are already
17584 rejected altogether due to the minimum version requirement of
17585 0.2.3.16-alpha. Closes ticket 13152.
17586 - The "AuthDirRejectUnlisted" option no longer has any effect, as
17587 the fingerprints file (approved-routers) has been deprecated.
17588 - Directory authorities do not support being Naming dirauths anymore.
17589 The "NamingAuthoritativeDir" config option is now obsolete.
17590 - Directory authorities do not support giving out the BadDirectory
17592 - Directory authorities no longer advertise or support consensus
17593 methods 1 through 12 inclusive. These consensus methods were
17594 obsolete and/or insecure: maintaining the ability to support them
17595 served no good purpose. Implements part of proposal 215; closes
17598 o Testing (test-network.sh):
17599 - Stop using "echo -n", as some shells' built-in echo doesn't
17600 support "-n". Instead, use "/bin/echo -n". Partially fixes
17602 - Stop an apparent test-network hang when used with make -j2. Fixes
17604 - Add a --delay option to test-network.sh, which configures the
17605 delay before the chutney network tests for data transmission.
17606 Partially implements ticket 13161.
17609 Changes in version 0.2.5.10 - 2014-10-24
17610 Tor 0.2.5.10 is the first stable release in the 0.2.5 series.
17612 It adds several new security features, including improved
17613 denial-of-service resistance for relays, new compiler hardening
17614 options, and a system-call sandbox for hardened installations on Linux
17615 (requires seccomp2). The controller protocol has several new features,
17616 resolving IPv6 addresses should work better than before, and relays
17617 should be a little more CPU-efficient. We've added support for more
17618 OpenBSD and FreeBSD transparent proxy types. We've improved the build
17619 system and testing infrastructure to allow unit testing of more parts
17620 of the Tor codebase. Finally, we've addressed several nagging pluggable
17621 transport usability issues, and included numerous other small bugfixes
17622 and features mentioned below.
17624 This release marks end-of-life for Tor 0.2.3.x; those Tor versions
17625 have accumulated many known flaws; everyone should upgrade.
17627 o Deprecated versions:
17628 - Tor 0.2.3.x has reached end-of-life; it has received no patches or
17629 attention for some while.
17632 Changes in version 0.2.5.9-rc - 2014-10-20
17633 Tor 0.2.5.9-rc is the third release candidate for the Tor 0.2.5.x
17634 series. It disables SSL3 in response to the recent "POODLE" attack
17635 (even though POODLE does not affect Tor). It also works around a crash
17636 bug caused by some operating systems' response to the "POODLE" attack
17637 (which does affect Tor). It also contains a few miscellaneous fixes.
17639 o Major security fixes:
17640 - Disable support for SSLv3. All versions of OpenSSL in use with Tor
17641 today support TLS 1.0 or later, so we can safely turn off support
17642 for this old (and insecure) protocol. Fixes bug 13426.
17644 o Major bugfixes (openssl bug workaround):
17645 - Avoid crashing when using OpenSSL version 0.9.8zc, 1.0.0o, or
17646 1.0.1j, built with the 'no-ssl3' configuration option. Fixes bug
17647 13471. This is a workaround for an OpenSSL bug.
17650 - Disable the sandbox name resolver cache when running tor-resolve:
17651 tor-resolve doesn't use the sandbox code, and turning it on was
17652 breaking attempts to do tor-resolve on a non-default server on
17653 Linux. Fixes bug 13295; bugfix on 0.2.5.3-alpha.
17655 o Compilation fixes:
17656 - Build and run correctly on systems like OpenBSD-current that have
17657 patched OpenSSL to remove get_cipher_by_char and/or its
17658 implementations. Fixes issue 13325.
17660 o Downgraded warnings:
17661 - Downgrade the severity of the 'unexpected sendme cell from client'
17662 from 'warn' to 'protocol warning'. Closes ticket 8093.
17665 Changes in version 0.2.4.25 - 2014-10-20
17666 Tor 0.2.4.25 disables SSL3 in response to the recent "POODLE" attack
17667 (even though POODLE does not affect Tor). It also works around a crash
17668 bug caused by some operating systems' response to the "POODLE" attack
17669 (which does affect Tor).
17671 o Major security fixes (also in 0.2.5.9-rc):
17672 - Disable support for SSLv3. All versions of OpenSSL in use with Tor
17673 today support TLS 1.0 or later, so we can safely turn off support
17674 for this old (and insecure) protocol. Fixes bug 13426.
17676 o Major bugfixes (openssl bug workaround, also in 0.2.5.9-rc):
17677 - Avoid crashing when using OpenSSL version 0.9.8zc, 1.0.0o, or
17678 1.0.1j, built with the 'no-ssl3' configuration option. Fixes bug
17679 13471. This is a workaround for an OpenSSL bug.
17682 Changes in version 0.2.5.8-rc - 2014-09-22
17683 Tor 0.2.5.8-rc is the second release candidate for the Tor 0.2.5.x
17684 series. It fixes a bug that affects consistency and speed when
17685 connecting to hidden services, and it updates the location of one of
17686 the directory authorities.
17689 - Clients now send the correct address for their chosen rendezvous
17690 point when trying to access a hidden service. They used to send
17691 the wrong address, which would still work some of the time because
17692 they also sent the identity digest of the rendezvous point, and if
17693 the hidden service happened to try connecting to the rendezvous
17694 point from a relay that already had a connection open to it,
17695 the relay would reuse that connection. Now connections to hidden
17696 services should be more robust and faster. Also, this bug meant
17697 that clients were leaking to the hidden service whether they were
17698 on a little-endian (common) or big-endian (rare) system, which for
17699 some users might have reduced their anonymity. Fixes bug 13151;
17700 bugfix on 0.2.1.5-alpha.
17702 o Directory authority changes:
17703 - Change IP address for gabelmoo (v3 directory authority).
17706 Changes in version 0.2.4.24 - 2014-09-22
17707 Tor 0.2.4.24 fixes a bug that affects consistency and speed when
17708 connecting to hidden services, and it updates the location of one of
17709 the directory authorities.
17712 - Clients now send the correct address for their chosen rendezvous
17713 point when trying to access a hidden service. They used to send
17714 the wrong address, which would still work some of the time because
17715 they also sent the identity digest of the rendezvous point, and if
17716 the hidden service happened to try connecting to the rendezvous
17717 point from a relay that already had a connection open to it,
17718 the relay would reuse that connection. Now connections to hidden
17719 services should be more robust and faster. Also, this bug meant
17720 that clients were leaking to the hidden service whether they were
17721 on a little-endian (common) or big-endian (rare) system, which for
17722 some users might have reduced their anonymity. Fixes bug 13151;
17723 bugfix on 0.2.1.5-alpha.
17725 o Directory authority changes:
17726 - Change IP address for gabelmoo (v3 directory authority).
17728 o Minor features (geoip):
17729 - Update geoip and geoip6 to the August 7 2014 Maxmind GeoLite2
17733 Changes in version 0.2.5.7-rc - 2014-09-11
17734 Tor 0.2.5.7-rc fixes several regressions from earlier in the 0.2.5.x
17735 release series, and some long-standing bugs related to ORPort reachability
17736 testing and failure to send CREATE cells. It is the first release
17737 candidate for the Tor 0.2.5.x series.
17739 o Major bugfixes (client, startup):
17740 - Start making circuits as soon as DisabledNetwork is turned off.
17741 When Tor started with DisabledNetwork set, it would correctly
17742 conclude that it shouldn't build circuits, but it would mistakenly
17743 cache this conclusion, and continue believing it even when
17744 DisableNetwork is set to 0. Fixes the bug introduced by the fix
17745 for bug 11200; bugfix on 0.2.5.4-alpha.
17746 - Resume expanding abbreviations for command-line options. The fix
17747 for bug 4647 accidentally removed our hack from bug 586 that
17748 rewrote HashedControlPassword to __HashedControlSessionPassword
17749 when it appears on the commandline (which allowed the user to set
17750 her own HashedControlPassword in the torrc file while the
17751 controller generates a fresh session password for each run). Fixes
17752 bug 12948; bugfix on 0.2.5.1-alpha.
17753 - Warn about attempts to run hidden services and relays in the same
17754 process: that's probably not a good idea. Closes ticket 12908.
17756 o Major bugfixes (relay):
17757 - Avoid queuing or sending destroy cells for circuit ID zero when we
17758 fail to send a CREATE cell. Fixes bug 12848; bugfix on 0.0.8pre1.
17759 Found and fixed by "cypherpunks".
17760 - Fix ORPort reachability detection on relays running behind a
17761 proxy, by correctly updating the "local" mark on the controlling
17762 channel when changing the address of an or_connection_t after the
17763 handshake. Fixes bug 12160; bugfix on 0.2.4.4-alpha.
17765 o Minor features (bridge):
17766 - Add an ExtORPortCookieAuthFileGroupReadable option to make the
17767 cookie file for the ExtORPort g+r by default.
17769 o Minor features (geoip):
17770 - Update geoip and geoip6 to the August 7 2014 Maxmind GeoLite2
17773 o Minor bugfixes (logging):
17774 - Reduce the log severity of the "Pluggable transport proxy does not
17775 provide any needed transports and will not be launched." message,
17776 since Tor Browser includes several ClientTransportPlugin lines in
17777 its torrc-defaults file, leading every Tor Browser user who looks
17778 at her logs to see these notices and wonder if they're dangerous.
17779 Resolves bug 13124; bugfix on 0.2.5.3-alpha.
17780 - Downgrade "Unexpected onionskin length after decryption" warning
17781 to a protocol-warn, since there's nothing relay operators can do
17782 about a client that sends them a malformed create cell. Resolves
17783 bug 12996; bugfix on 0.0.6rc1.
17784 - Log more specific warnings when we get an ESTABLISH_RENDEZVOUS
17785 cell on a cannibalized or non-OR circuit. Resolves ticket 12997.
17786 - When logging information about an EXTEND2 or EXTENDED2 cell, log
17787 their names correctly. Fixes part of bug 12700; bugfix
17789 - When logging information about a relay cell whose command we don't
17790 recognize, log its command as an integer. Fixes part of bug 12700;
17791 bugfix on 0.2.1.10-alpha.
17792 - Escape all strings from the directory connection before logging
17793 them. Fixes bug 13071; bugfix on 0.1.1.15. Patch from "teor".
17795 o Minor bugfixes (controller):
17796 - Restore the functionality of CookieAuthFileGroupReadable. Fixes
17797 bug 12864; bugfix on 0.2.5.1-alpha.
17798 - Actually send TRANSPORT_LAUNCHED and HS_DESC events to
17799 controllers. Fixes bug 13085; bugfix on 0.2.5.1-alpha. Patch
17802 o Minor bugfixes (compilation):
17803 - Fix compilation of test.h with MSVC. Patch from Gisle Vanem;
17804 bugfix on 0.2.5.5-alpha.
17805 - Make the nmake make files work again. Fixes bug 13081. Bugfix on
17806 0.2.5.1-alpha. Patch from "NewEraCracker".
17807 - In routerlist_assert_ok(), don't take the address of a
17808 routerinfo's cache_info member unless that routerinfo is non-NULL.
17809 Fixes bug 13096; bugfix on 0.1.1.9-alpha. Patch by "teor".
17810 - Fix a large number of false positive warnings from the clang
17811 analyzer static analysis tool. This should make real warnings
17812 easier for clang analyzer to find. Patch from "teor". Closes
17815 o Distribution (systemd):
17816 - Verify configuration file via ExecStartPre in the systemd unit
17817 file. Patch from intrigeri; resolves ticket 12730.
17818 - Explicitly disable RunAsDaemon in the systemd unit file. Our
17819 current systemd unit uses "Type = simple", so systemd does not
17820 expect tor to fork. If the user has "RunAsDaemon 1" in their
17821 torrc, then things won't work as expected. This is e.g. the case
17822 on Debian (and derivatives), since there we pass "--defaults-torrc
17823 /usr/share/tor/tor-service-defaults-torrc" (that contains
17824 "RunAsDaemon 1") by default. Patch by intrigeri; resolves
17828 - Adjust the URLs in the README to refer to the new locations of
17829 several documents on the website. Fixes bug 12830. Patch from
17831 - Document 'reject6' and 'accept6' ExitPolicy entries. Resolves
17835 Changes in version 0.2.5.6-alpha - 2014-07-28
17836 Tor 0.2.5.6-alpha brings us a big step closer to slowing down the
17837 risk from guard rotation, and fixes a variety of other issues to get
17838 us closer to a release candidate.
17840 o Major features (also in 0.2.4.23):
17841 - Make the number of entry guards configurable via a new
17842 NumEntryGuards consensus parameter, and the number of directory
17843 guards configurable via a new NumDirectoryGuards consensus
17844 parameter. Implements ticket 12688.
17846 o Major bugfixes (also in 0.2.4.23):
17847 - Fix a bug in the bounds-checking in the 32-bit curve25519-donna
17848 implementation that caused incorrect results on 32-bit
17849 implementations when certain malformed inputs were used along with
17850 a small class of private ntor keys. This bug does not currently
17851 appear to allow an attacker to learn private keys or impersonate a
17852 Tor server, but it could provide a means to distinguish 32-bit Tor
17853 implementations from 64-bit Tor implementations. Fixes bug 12694;
17854 bugfix on 0.2.4.8-alpha. Bug found by Robert Ransom; fix from
17858 - Perform circuit cleanup operations even when circuit
17859 construction operations are disabled (because the network is
17860 disabled, or because there isn't enough directory information).
17861 Previously, when we were not building predictive circuits, we
17862 were not closing expired circuits either. Fixes bug 8387; bugfix on
17863 0.1.1.11-alpha. This bug became visible in 0.2.4.10-alpha when we
17864 became more strict about when we have "enough directory information
17865 to build circuits".
17868 - Authorities now assign the Guard flag to the fastest 25% of the
17869 network (it used to be the fastest 50%). Also raise the consensus
17870 weight that guarantees the Guard flag from 250 to 2000. For the
17871 current network, this results in about 1100 guards, down from 2500.
17872 This step paves the way for moving the number of entry guards
17873 down to 1 (proposal 236) while still providing reasonable expected
17874 performance for most users. Implements ticket 12690.
17875 - Update geoip and geoip6 to the July 10 2014 Maxmind GeoLite2
17877 - Slightly enhance the diagnostic message for bug 12184.
17879 o Minor bugfixes (also in 0.2.4.23):
17880 - Warn and drop the circuit if we receive an inbound 'relay early'
17881 cell. Those used to be normal to receive on hidden service circuits
17882 due to bug 1038, but the buggy Tor versions are long gone from
17883 the network so we can afford to resume watching for them. Resolves
17884 the rest of bug 1038; bugfix on 0.2.1.19.
17885 - Correct a confusing error message when trying to extend a circuit
17886 via the control protocol but we don't know a descriptor or
17887 microdescriptor for one of the specified relays. Fixes bug 12718;
17888 bugfix on 0.2.3.1-alpha.
17891 - Fix compilation when building with bufferevents enabled. (This
17892 configuration is still not expected to work, however.)
17893 Fixes bugs 12438, 12474, 11578; bugfixes on 0.2.5.1-alpha and
17894 0.2.5.3-alpha. Patches from Anthony G. Basile and Sathyanarayanan
17896 - Compile correctly with builds and forks of OpenSSL (such as
17897 LibreSSL) that disable compression. Fixes bug 12602; bugfix on
17898 0.2.1.1-alpha. Patch from "dhill".
17901 Changes in version 0.2.4.23 - 2014-07-28
17902 Tor 0.2.4.23 brings us a big step closer to slowing down the risk from
17903 guard rotation, and also backports several important fixes from the
17904 Tor 0.2.5 alpha release series.
17907 - Clients now look at the "usecreatefast" consensus parameter to
17908 decide whether to use CREATE_FAST or CREATE cells for the first hop
17909 of their circuit. This approach can improve security on connections
17910 where Tor's circuit handshake is stronger than the available TLS
17911 connection security levels, but the tradeoff is more computational
17912 load on guard relays. Implements proposal 221. Resolves ticket 9386.
17913 - Make the number of entry guards configurable via a new
17914 NumEntryGuards consensus parameter, and the number of directory
17915 guards configurable via a new NumDirectoryGuards consensus
17916 parameter. Implements ticket 12688.
17919 - Fix a bug in the bounds-checking in the 32-bit curve25519-donna
17920 implementation that caused incorrect results on 32-bit
17921 implementations when certain malformed inputs were used along with
17922 a small class of private ntor keys. This bug does not currently
17923 appear to allow an attacker to learn private keys or impersonate a
17924 Tor server, but it could provide a means to distinguish 32-bit Tor
17925 implementations from 64-bit Tor implementations. Fixes bug 12694;
17926 bugfix on 0.2.4.8-alpha. Bug found by Robert Ransom; fix from
17930 - Warn and drop the circuit if we receive an inbound 'relay early'
17931 cell. Those used to be normal to receive on hidden service circuits
17932 due to bug 1038, but the buggy Tor versions are long gone from
17933 the network so we can afford to resume watching for them. Resolves
17934 the rest of bug 1038; bugfix on 0.2.1.19.
17935 - Correct a confusing error message when trying to extend a circuit
17936 via the control protocol but we don't know a descriptor or
17937 microdescriptor for one of the specified relays. Fixes bug 12718;
17938 bugfix on 0.2.3.1-alpha.
17939 - Avoid an illegal read from stack when initializing the TLS
17940 module using a version of OpenSSL without all of the ciphers
17941 used by the v2 link handshake. Fixes bug 12227; bugfix on
17942 0.2.4.8-alpha. Found by "starlight".
17945 - Update geoip and geoip6 to the July 10 2014 Maxmind GeoLite2
17949 Changes in version 0.2.5.5-alpha - 2014-06-18
17950 Tor 0.2.5.5-alpha fixes a wide variety of remaining issues in the Tor
17951 0.2.5.x release series, including a couple of DoS issues, some
17952 performance regressions, a large number of bugs affecting the Linux
17953 seccomp2 sandbox code, and various other bugfixes. It also adds
17954 diagnostic bugfixes for a few tricky issues that we're trying to
17957 o Major features (security, traffic analysis resistance):
17958 - Several major improvements to the algorithm used to decide when to
17959 close TLS connections. Previous versions of Tor closed connections
17960 at a fixed interval after the last time a non-padding cell was
17961 sent over the connection, regardless of the target of the
17962 connection. Now, we randomize the intervals by adding up to 50% of
17963 their base value, we measure the length of time since connection
17964 last had at least one circuit, and we allow connections to known
17965 ORs to remain open a little longer (15 minutes instead of 3
17966 minutes minimum). These changes should improve Tor's resistance
17967 against some kinds of traffic analysis, and lower some overhead
17968 from needlessly closed connections. Fixes ticket 6799.
17969 Incidentally fixes ticket 12023; bugfix on 0.2.5.1-alpha.
17971 o Major bugfixes (security, OOM, new since 0.2.5.4-alpha, also in 0.2.4.22):
17972 - Fix a memory leak that could occur if a microdescriptor parse
17973 fails during the tokenizing step. This bug could enable a memory
17974 exhaustion attack by directory servers. Fixes bug 11649; bugfix
17977 o Major bugfixes (security, directory authorities):
17978 - Directory authorities now include a digest of each relay's
17979 identity key as a part of its microdescriptor.
17981 This is a workaround for bug 11743 (reported by "cypherpunks"),
17982 where Tor clients do not support receiving multiple
17983 microdescriptors with the same SHA256 digest in the same
17984 consensus. When clients receive a consensus like this, they only
17985 use one of the relays. Without this fix, a hostile relay could
17986 selectively disable some client use of target relays by
17987 constructing a router descriptor with a different identity and the
17988 same microdescriptor parameters and getting the authorities to
17989 list it in a microdescriptor consensus. This fix prevents an
17990 attacker from causing a microdescriptor collision, because the
17991 router's identity is not forgeable.
17993 o Major bugfixes (relay):
17994 - Use a direct dirport connection when uploading non-anonymous
17995 descriptors to the directory authorities. Previously, relays would
17996 incorrectly use tunnel connections under a fairly wide variety of
17997 circumstances. Fixes bug 11469; bugfix on 0.2.4.3-alpha.
17998 - When a circuit accidentally has the same circuit ID for its
17999 forward and reverse direction, correctly detect the direction of
18000 cells using that circuit. Previously, this bug made roughly one
18001 circuit in a million non-functional. Fixes bug 12195; this is a
18002 bugfix on every version of Tor.
18004 o Major bugfixes (client, pluggable transports):
18005 - When managing pluggable transports, use OS notification facilities
18006 to learn if they have crashed, and don't attempt to kill any
18007 process that has already exited. Fixes bug 8746; bugfix
18010 o Minor features (diagnostic):
18011 - When logging a warning because of bug 7164, additionally check the
18012 hash table for consistency (as proposed on ticket 11737). This may
18013 help diagnose bug 7164.
18014 - When we log a heartbeat, log how many one-hop circuits we have
18015 that are at least 30 minutes old, and log status information about
18016 a few of them. This is an attempt to track down bug 8387.
18017 - When encountering an unexpected CR while writing text to a file on
18018 Windows, log the name of the file. Should help diagnosing
18020 - Give more specific warnings when a client notices that an onion
18021 handshake has failed. Fixes ticket 9635.
18022 - Add significant new logging code to attempt to diagnose bug 12184,
18023 where relays seem to run out of available circuit IDs.
18024 - Improve the diagnostic log message for bug 8387 even further to
18025 try to improve our odds of figuring out why one-hop directory
18026 circuits sometimes do not get closed.
18028 o Minor features (security, memory management):
18029 - Memory allocation tricks (mempools and buffer freelists) are now
18030 disabled by default. You can turn them back on with
18031 --enable-mempools and --enable-buf-freelists respectively. We're
18032 disabling these features because malloc performance is good enough
18033 on most platforms, and a similar feature in OpenSSL exacerbated
18034 exploitation of the Heartbleed attack. Resolves ticket 11476.
18036 o Minor features (security):
18037 - Apply the secure SipHash-2-4 function to the hash table mapping
18038 circuit IDs and channels to circuits. We missed this one when we
18039 were converting all the other hash functions to use SipHash back
18040 in 0.2.5.3-alpha. Resolves ticket 11750.
18042 o Minor features (build):
18043 - The configure script has a --disable-seccomp option to turn off
18044 support for libseccomp on systems that have it, in case it (or
18045 Tor's use of it) is broken. Resolves ticket 11628.
18047 o Minor features (other):
18048 - Update geoip and geoip6 to the June 4 2014 Maxmind GeoLite2
18051 o Minor bugfixes (security, new since 0.2.5.4-alpha, also in 0.2.4.22):
18052 - When running a hidden service, do not allow TunneledDirConns 0;
18053 this will keep the hidden service from running, and also
18054 make it publish its descriptors directly over HTTP. Fixes bug 10849;
18055 bugfix on 0.2.1.1-alpha.
18057 o Minor bugfixes (performance):
18058 - Avoid a bug where every successful connection made us recompute
18059 the flag telling us whether we have sufficient information to
18060 build circuits. Previously, we would forget our cached value
18061 whenever we successfully opened a channel (or marked a router as
18062 running or not running for any other reason), regardless of
18063 whether we had previously believed the router to be running. This
18064 forced us to run an expensive update operation far too often.
18065 Fixes bug 12170; bugfix on 0.1.2.1-alpha.
18066 - Avoid using tor_memeq() for checking relay cell integrity. This
18067 removes a possible performance bottleneck. Fixes part of bug
18068 12169; bugfix on 0.2.1.31.
18070 o Minor bugfixes (compilation):
18071 - Fix compilation of test_status.c when building with MVSC. Bugfix
18072 on 0.2.5.4-alpha. Patch from Gisle Vanem.
18073 - Resolve GCC complaints on OpenBSD about discarding constness in
18074 TO_{ORIGIN,OR}_CIRCUIT functions. Fixes part of bug 11633; bugfix
18075 on 0.1.1.23. Patch from Dana Koch.
18076 - Resolve clang complaints on OpenBSD with -Wshorten-64-to-32 due to
18077 treatment of long and time_t as comparable types. Fixes part of
18078 bug 11633. Patch from Dana Koch.
18079 - Make Tor compile correctly with --disable-buf-freelists. Fixes bug
18080 11623; bugfix on 0.2.5.3-alpha.
18081 - When deciding whether to build the 64-bit curve25519
18082 implementation, detect platforms where we can compile 128-bit
18083 arithmetic but cannot link it. Fixes bug 11729; bugfix on
18084 0.2.4.8-alpha. Patch from "conradev".
18085 - Fix compilation when DNS_CACHE_DEBUG is enabled. Fixes bug 11761;
18086 bugfix on 0.2.3.13-alpha. Found by "cypherpunks".
18087 - Fix compilation with dmalloc. Fixes bug 11605; bugfix
18090 o Minor bugfixes (Directory server):
18091 - When sending a compressed set of descriptors or microdescriptors,
18092 make sure to finalize the zlib stream. Previously, we would write
18093 all the compressed data, but if the last descriptor we wanted to
18094 send was missing or too old, we would not mark the stream as
18095 finished. This caused problems for decompression tools. Fixes bug
18096 11648; bugfix on 0.1.1.23.
18098 o Minor bugfixes (Linux seccomp sandbox):
18099 - Make the seccomp sandbox code compile under ARM Linux. Fixes bug
18100 11622; bugfix on 0.2.5.1-alpha.
18101 - Avoid crashing when re-opening listener ports with the seccomp
18102 sandbox active. Fixes bug 12115; bugfix on 0.2.5.1-alpha.
18103 - Avoid crashing with the seccomp sandbox enabled along with
18104 ConstrainedSockets. Fixes bug 12139; bugfix on 0.2.5.1-alpha.
18105 - When we receive a SIGHUP with the sandbox enabled, correctly
18106 support rotating our log files. Fixes bug 12032; bugfix
18108 - Avoid crash when running with sandboxing enabled and
18109 DirReqStatistics not disabled. Fixes bug 12035; bugfix
18111 - Fix a "BUG" warning when trying to write bridge-stats files with
18112 the Linux syscall sandbox filter enabled. Fixes bug 12041; bugfix
18114 - Prevent the sandbox from crashing on startup when run with the
18115 --enable-expensive-hardening configuration option. Fixes bug
18116 11477; bugfix on 0.2.5.4-alpha.
18117 - When running with DirPortFrontPage and sandboxing both enabled,
18118 reload the DirPortFrontPage correctly when restarting. Fixes bug
18119 12028; bugfix on 0.2.5.1-alpha.
18120 - Don't try to enable the sandbox when using the Tor binary to check
18121 its configuration, hash a passphrase, or so on. Doing so was
18122 crashing on startup for some users. Fixes bug 11609; bugfix
18124 - Avoid warnings when running with sandboxing and node statistics
18125 enabled at the same time. Fixes part of 12064; bugfix on
18126 0.2.5.1-alpha. Patch from Michael Wolf.
18127 - Avoid warnings when running with sandboxing enabled at the same
18128 time as cookie authentication, hidden services, or directory
18129 authority voting. Fixes part of 12064; bugfix on 0.2.5.1-alpha.
18130 - Do not allow options that require calls to exec to be enabled
18131 alongside the seccomp2 sandbox: they will inevitably crash. Fixes
18132 bug 12043; bugfix on 0.2.5.1-alpha.
18133 - Handle failures in getpwnam()/getpwuid() when running with the
18134 User option set and the Linux syscall sandbox enabled. Fixes bug
18135 11946; bugfix on 0.2.5.1-alpha.
18136 - Refactor the getaddrinfo workaround that the seccomp sandbox uses
18137 to avoid calling getaddrinfo() after installing the sandbox
18138 filters. Previously, it preloaded a cache with the IPv4 address
18139 for our hostname, and nothing else. Now, it loads the cache with
18140 every address that it used to initialize the Tor process. Fixes
18141 bug 11970; bugfix on 0.2.5.1-alpha.
18143 o Minor bugfixes (pluggable transports):
18144 - Enable the ExtORPortCookieAuthFile option, to allow changing the
18145 default location of the authentication token for the extended OR
18146 Port as used by sever-side pluggable transports. We had
18147 implemented this option before, but the code to make it settable
18148 had been omitted. Fixes bug 11635; bugfix on 0.2.5.1-alpha.
18149 - Avoid another 60-second delay when starting Tor in a pluggable-
18150 transport-using configuration when we already have cached
18151 descriptors for our bridges. Fixes bug 11965; bugfix
18154 o Minor bugfixes (client):
18155 - Avoid "Tried to open a socket with DisableNetwork set" warnings
18156 when starting a client with bridges configured and DisableNetwork
18157 set. (Tor launcher starts Tor with DisableNetwork set the first
18158 time it runs.) Fixes bug 10405; bugfix on 0.2.3.9-alpha.
18160 o Minor bugfixes (testing):
18161 - The Python parts of the test scripts now work on Python 3 as well
18162 as Python 2, so systems where '/usr/bin/python' is Python 3 will
18163 no longer have the tests break. Fixes bug 11608; bugfix
18165 - When looking for versions of python that we could run the tests
18166 with, check for "python2.7" and "python3.3"; previously we were
18167 only looking for "python", "python2", and "python3". Patch from
18168 Dana Koch. Fixes bug 11632; bugfix on 0.2.5.2-alpha.
18169 - Fix all valgrind warnings produced by the unit tests. There were
18170 over a thousand memory leak warnings previously, mostly produced
18171 by forgetting to free things in the unit test code. Fixes bug
18172 11618, bugfixes on many versions of Tor.
18174 o Minor bugfixes (tor-fw-helper):
18175 - Give a correct log message when tor-fw-helper fails to launch.
18176 (Previously, we would say something like "tor-fw-helper sent us a
18177 string we could not parse".) Fixes bug 9781; bugfix
18180 o Minor bugfixes (relay, threading):
18181 - Check return code on spawn_func() in cpuworker code, so that we
18182 don't think we've spawned a nonworking cpuworker and write junk to
18183 it forever. Fix related to bug 4345; bugfix on all released Tor
18184 versions. Found by "skruffy".
18185 - Use a pthread_attr to make sure that spawn_func() cannot return an
18186 error while at the same time launching a thread. Fix related to
18187 bug 4345; bugfix on all released Tor versions. Reported
18190 o Minor bugfixes (relay, oom prevention):
18191 - Correctly detect the total available system memory. We tried to do
18192 this in 0.2.5.4-alpha, but the code was set up to always return an
18193 error value, even on success. Fixes bug 11805; bugfix
18196 o Minor bugfixes (relay, other):
18197 - We now drop CREATE cells for already-existent circuit IDs and for
18198 zero-valued circuit IDs, regardless of other factors that might
18199 otherwise have called for DESTROY cells. Fixes bug 12191; bugfix
18201 - Avoid an illegal read from stack when initializing the TLS module
18202 using a version of OpenSSL without all of the ciphers used by the
18203 v2 link handshake. Fixes bug 12227; bugfix on 0.2.4.8-alpha. Found
18205 - When rejecting DATA cells for stream_id zero, still count them
18206 against the circuit's deliver window so that we don't fail to send
18207 a SENDME. Fixes bug 11246; bugfix on 0.2.4.10-alpha.
18209 o Minor bugfixes (logging):
18210 - Fix a misformatted log message about delayed directory fetches.
18211 Fixes bug 11654; bugfix on 0.2.5.3-alpha.
18212 - Squelch a spurious LD_BUG message "No origin circuit for
18213 successful SOCKS stream" in certain hidden service failure cases;
18217 - Include a tor.service file in contrib/dist for use with systemd.
18218 Some distributions will be able to use this file unmodified;
18219 others will need to tweak it, or write their own. Patch from Jamie
18220 Nguyen; resolves ticket 8368.
18223 - Clean up several option names in the manpage to match their real
18224 names, add the missing documentation for a couple of testing and
18225 directory authority options, remove the documentation for a
18226 V2-directory fetching option that no longer exists. Resolves
18228 - Correct the documentation so that it lists the correct directory
18229 for the stats files. (They are in a subdirectory called "stats",
18231 - In the manpage, move more authority-only options into the
18232 directory authority section so that operators of regular directory
18233 caches don't get confused.
18236 - The contrib directory has been sorted and tidied. Before, it was
18237 an unsorted dumping ground for useful and not-so-useful things.
18238 Now, it is divided based on functionality, and the items which
18239 seemed to be nonfunctional or useless have been removed. Resolves
18240 ticket 8966; based on patches from "rl1987".
18243 - Remove /tor/dbg-stability.txt URL that was meant to help debug WFU
18244 and MTBF calculations, but that nobody was using. Fixes ticket 11742.
18245 - The TunnelDirConns and PreferTunnelledDirConns options no longer
18246 exist; tunneled directory connections have been available since
18247 0.1.2.5-alpha, and turning them off is not a good idea. This is a
18248 brute-force fix for 10849, where "TunnelDirConns 0" would break
18252 Changes in version 0.2.4.22 - 2014-05-16
18253 Tor 0.2.4.22 backports numerous high-priority fixes from the Tor 0.2.5
18254 alpha release series. These include blocking all authority signing
18255 keys that may have been affected by the OpenSSL "heartbleed" bug,
18256 choosing a far more secure set of TLS ciphersuites by default, closing
18257 a couple of memory leaks that could be used to run a target relay out
18258 of RAM, and several others.
18260 o Major features (security, backport from 0.2.5.4-alpha):
18261 - Block authority signing keys that were used on authorities
18262 vulnerable to the "heartbleed" bug in OpenSSL (CVE-2014-0160). (We
18263 don't have any evidence that these keys _were_ compromised; we're
18264 doing this to be prudent.) Resolves ticket 11464.
18266 o Major bugfixes (security, OOM):
18267 - Fix a memory leak that could occur if a microdescriptor parse
18268 fails during the tokenizing step. This bug could enable a memory
18269 exhaustion attack by directory servers. Fixes bug 11649; bugfix
18272 o Major bugfixes (TLS cipher selection, backport from 0.2.5.4-alpha):
18273 - The relay ciphersuite list is now generated automatically based on
18274 uniform criteria, and includes all OpenSSL ciphersuites with
18275 acceptable strength and forward secrecy. Previously, we had left
18276 some perfectly fine ciphersuites unsupported due to omission or
18277 typo. Resolves bugs 11513, 11492, 11498, 11499. Bugs reported by
18278 'cypherpunks'. Bugfix on 0.2.4.8-alpha.
18279 - Relays now trust themselves to have a better view than clients of
18280 which TLS ciphersuites are better than others. (Thanks to bug
18281 11513, the relay list is now well-considered, whereas the client
18282 list has been chosen mainly for anti-fingerprinting purposes.)
18283 Relays prefer: AES over 3DES; then ECDHE over DHE; then GCM over
18284 CBC; then SHA384 over SHA256 over SHA1; and last, AES256 over
18285 AES128. Resolves ticket 11528.
18286 - Clients now try to advertise the same list of ciphersuites as
18287 Firefox 28. This change enables selection of (fast) GCM
18288 ciphersuites, disables some strange old ciphers, and stops
18289 advertising the ECDH (not to be confused with ECDHE) ciphersuites.
18290 Resolves ticket 11438.
18292 o Minor bugfixes (configuration, security):
18293 - When running a hidden service, do not allow TunneledDirConns 0:
18294 trying to set that option together with a hidden service would
18295 otherwise prevent the hidden service from running, and also make
18296 it publish its descriptors directly over HTTP. Fixes bug 10849;
18297 bugfix on 0.2.1.1-alpha.
18299 o Minor bugfixes (controller, backport from 0.2.5.4-alpha):
18300 - Avoid sending a garbage value to the controller when a circuit is
18301 cannibalized. Fixes bug 11519; bugfix on 0.2.3.11-alpha.
18303 o Minor bugfixes (exit relay, backport from 0.2.5.4-alpha):
18304 - Stop leaking memory when we successfully resolve a PTR record.
18305 Fixes bug 11437; bugfix on 0.2.4.7-alpha.
18307 o Minor bugfixes (bridge client, backport from 0.2.5.4-alpha):
18308 - Avoid 60-second delays in the bootstrapping process when Tor is
18309 launching for a second time while using bridges. Fixes bug 9229;
18310 bugfix on 0.2.0.3-alpha.
18312 o Minor bugfixes (relays and bridges, backport from 0.2.5.4-alpha):
18313 - Give the correct URL in the warning message when trying to run a
18314 relay on an ancient version of Windows. Fixes bug 9393.
18316 o Minor bugfixes (compilation):
18317 - Fix a compilation error when compiling with --disable-curve25519.
18318 Fixes bug 9700; bugfix on 0.2.4.17-rc.
18321 - Downgrade the warning severity for the the "md was still
18322 referenced 1 node(s)" warning. Tor 0.2.5.4-alpha has better code
18323 for trying to diagnose this bug, and the current warning in
18324 earlier versions of tor achieves nothing useful. Addresses warning
18327 o Minor features (log verbosity, backport from 0.2.5.4-alpha):
18328 - When we run out of usable circuit IDs on a channel, log only one
18329 warning for the whole channel, and describe how many circuits
18330 there were on the channel. Fixes part of ticket 11553.
18332 o Minor features (security, backport from 0.2.5.4-alpha):
18333 - Decrease the lower limit of MaxMemInCellQueues to 256 MBytes (but
18334 leave the default at 8GBytes), to better support Raspberry Pi
18335 users. Fixes bug 9686; bugfix on 0.2.4.14-alpha.
18337 o Documentation (backport from 0.2.5.4-alpha):
18338 - Correctly document that we search for a system torrc file before
18339 looking in ~/.torrc. Fixes documentation side of 9213; bugfix on
18343 Changes in version 0.2.5.4-alpha - 2014-04-25
18344 Tor 0.2.5.4-alpha includes several security and performance
18345 improvements for clients and relays, including blacklisting authority
18346 signing keys that were used while susceptible to the OpenSSL
18347 "heartbleed" bug, fixing two expensive functions on busy relays,
18348 improved TLS ciphersuite preference lists, support for run-time
18349 hardening on compilers that support AddressSanitizer, and more work on
18350 the Linux sandbox code.
18352 There are also several usability fixes for clients (especially clients
18353 that use bridges), two new TransPort protocols supported (one on
18354 OpenBSD, one on FreeBSD), and various other bugfixes.
18356 This release marks end-of-life for Tor 0.2.2.x; those Tor versions
18357 have accumulated many known flaws; everyone should upgrade.
18359 o Major features (security):
18360 - If you don't specify MaxMemInQueues yourself, Tor now tries to
18361 pick a good value based on your total system memory. Previously,
18362 the default was always 8 GB. You can still override the default by
18363 setting MaxMemInQueues yourself. Resolves ticket 11396.
18364 - Block authority signing keys that were used on authorities
18365 vulnerable to the "heartbleed" bug in OpenSSL (CVE-2014-0160). (We
18366 don't have any evidence that these keys _were_ compromised; we're
18367 doing this to be prudent.) Resolves ticket 11464.
18369 o Major features (relay performance):
18370 - Speed up server-side lookups of rendezvous and introduction point
18371 circuits by using hashtables instead of linear searches. These
18372 functions previously accounted between 3 and 7% of CPU usage on
18373 some busy relays. Resolves ticket 9841.
18374 - Avoid wasting CPU when extending a circuit over a channel that is
18375 nearly out of circuit IDs. Previously, we would do a linear scan
18376 over possible circuit IDs before finding one or deciding that we
18377 had exhausted our possibilities. Now, we try at most 64 random
18378 circuit IDs before deciding that we probably won't succeed. Fixes
18379 a possible root cause of ticket 11553.
18381 o Major features (seccomp2 sandbox, Linux only):
18382 - The seccomp2 sandbox can now run a test network for multiple hours
18383 without crashing. The sandbox is still experimental, and more bugs
18384 will probably turn up. To try it, enable "Sandbox 1" on a Linux
18385 host. Resolves ticket 11351.
18386 - Strengthen sandbox code: the sandbox can now test the arguments
18387 for rename(), and blocks _sysctl() entirely. Resolves another part
18389 - When the sandbox blocks a system call, it now tries to log a stack
18390 trace before exiting. Resolves ticket 11465.
18392 o Major bugfixes (TLS cipher selection):
18393 - The relay ciphersuite list is now generated automatically based on
18394 uniform criteria, and includes all OpenSSL ciphersuites with
18395 acceptable strength and forward secrecy. Previously, we had left
18396 some perfectly fine ciphersuites unsupported due to omission or
18397 typo. Resolves bugs 11513, 11492, 11498, 11499. Bugs reported by
18398 'cypherpunks'. Bugfix on 0.2.4.8-alpha.
18399 - Relays now trust themselves to have a better view than clients of
18400 which TLS ciphersuites are better than others. (Thanks to bug
18401 11513, the relay list is now well-considered, whereas the client
18402 list has been chosen mainly for anti-fingerprinting purposes.)
18403 Relays prefer: AES over 3DES; then ECDHE over DHE; then GCM over
18404 CBC; then SHA384 over SHA256 over SHA1; and last, AES256 over
18405 AES128. Resolves ticket 11528.
18406 - Clients now try to advertise the same list of ciphersuites as
18407 Firefox 28. This change enables selection of (fast) GCM
18408 ciphersuites, disables some strange old ciphers, and stops
18409 advertising the ECDH (not to be confused with ECDHE) ciphersuites.
18410 Resolves ticket 11438.
18412 o Major bugfixes (bridge client):
18413 - Avoid 60-second delays in the bootstrapping process when Tor is
18414 launching for a second time while using bridges. Fixes bug 9229;
18415 bugfix on 0.2.0.3-alpha.
18417 o Minor features (transparent proxy, *BSD):
18418 - Support FreeBSD's ipfw firewall interface for TransPort ports on
18419 FreeBSD. To enable it, set "TransProxyType ipfw". Resolves ticket
18420 10267; patch from "yurivict".
18421 - Support OpenBSD's divert-to rules with the pf firewall for
18422 transparent proxy ports. To enable it, set "TransProxyType
18423 pf-divert". This allows Tor to run a TransPort transparent proxy
18424 port on OpenBSD 4.4 or later without root privileges. See the
18425 pf.conf(5) manual page for information on configuring pf to use
18426 divert-to rules. Closes ticket 10896; patch from Dana Koch.
18428 o Minor features (security):
18429 - New --enable-expensive-hardening option to enable security
18430 hardening options that consume nontrivial amounts of CPU and
18431 memory. Right now, this includes AddressSanitizer and UbSan, which
18432 are supported in newer versions of GCC and Clang. Closes ticket
18435 o Minor features (log verbosity):
18436 - Demote the message that we give when a flushing connection times
18437 out for too long from NOTICE to INFO. It was usually meaningless.
18438 Resolves ticket 5286.
18439 - Don't log so many notice-level bootstrapping messages at startup
18440 about downloading descriptors. Previously, we'd log a notice
18441 whenever we learned about more routers. Now, we only log a notice
18442 at every 5% of progress. Fixes bug 9963.
18443 - Warn less verbosely when receiving a malformed
18444 ESTABLISH_RENDEZVOUS cell. Fixes ticket 11279.
18445 - When we run out of usable circuit IDs on a channel, log only one
18446 warning for the whole channel, and describe how many circuits
18447 there were on the channel. Fixes part of ticket 11553.
18449 o Minor features (relay):
18450 - If a circuit timed out for at least 3 minutes, check if we have a
18451 new external IP address, and publish a new descriptor with the new
18452 IP address if it changed. Resolves ticket 2454.
18454 o Minor features (controller):
18455 - Make the entire exit policy available from the control port via
18456 GETINFO exit-policy/*. Implements enhancement 7952. Patch from
18458 - Because of the fix for ticket 11396, the real limit for memory
18459 usage may no longer match the configured MaxMemInQueues value. The
18460 real limit is now exposed via GETINFO limits/max-mem-in-queues.
18462 o Minor features (bridge client):
18463 - Report a more useful failure message when we can't connect to a
18464 bridge because we don't have the right pluggable transport
18465 configured. Resolves ticket 9665. Patch from Fábio J. Bertinatto.
18467 o Minor features (diagnostic):
18468 - Add more log messages to diagnose bug 7164, which causes
18469 intermittent "microdesc_free() called but md was still referenced"
18470 warnings. We now include more information, to figure out why we
18471 might be cleaning a microdescriptor for being too old if it's
18472 still referenced by a live node_t object.
18474 o Minor bugfixes (client, DNSPort):
18475 - When using DNSPort, try to respond to AAAA requests with AAAA
18476 answers. Previously, we hadn't looked at the request type when
18477 deciding which answer type to prefer. Fixes bug 10468; bugfix on
18479 - When receiving a DNS query for an unsupported record type, reply
18480 with no answer rather than with a NOTIMPL error. This behavior
18481 isn't correct either, but it will break fewer client programs, we
18482 hope. Fixes bug 10268; bugfix on 0.2.0.1-alpha. Original patch
18485 o Minor bugfixes (exit relay):
18486 - Stop leaking memory when we successfully resolve a PTR record.
18487 Fixes bug 11437; bugfix on 0.2.4.7-alpha.
18489 o Minor bugfixes (bridge client):
18490 - Stop accepting bridge lines containing hostnames. Doing so would
18491 cause clients to perform DNS requests on the hostnames, which was
18492 not sensible behavior. Fixes bug 10801; bugfix on 0.2.0.1-alpha.
18493 - Avoid a 60-second delay in the bootstrapping process when a Tor
18494 client with pluggable transports re-reads its configuration at
18495 just the wrong time. Re-fixes bug 11156; bugfix on 0.2.5.3-alpha.
18497 o Minor bugfixes (client, logging during bootstrap):
18498 - Warn only once if we start logging in an unsafe way. Previously,
18499 we complain as many times as we had problems. Fixes bug 9870;
18500 bugfix on 0.2.5.1-alpha.
18501 - Only report the first fatal bootstrap error on a given OR
18502 connection. This stops us from telling the controller bogus error
18503 messages like "DONE". Fixes bug 10431; bugfix on 0.2.1.1-alpha.
18504 - Be more helpful when trying to run sandboxed on Linux without
18505 libseccomp. Instead of saying "Sandbox is not implemented on this
18506 platform", we now explain that we need to be built with
18507 libseccomp. Fixes bug 11543; bugfix on 0.2.5.1-alpha.
18508 - Avoid generating spurious warnings when starting with
18509 DisableNetwork enabled. Fixes bug 11200 and bug 10405; bugfix on
18512 o Minor bugfixes (closing OR connections):
18513 - If write_to_buf() in connection_write_to_buf_impl_() ever fails,
18514 check if it's an or_connection_t and correctly call
18515 connection_or_close_for_error() rather than
18516 connection_mark_for_close() directly. Fixes bug 11304; bugfix on
18518 - When closing all connections on setting DisableNetwork to 1, use
18519 connection_or_close_normally() rather than closing OR connections
18520 out from under the channel layer. Fixes bug 11306; bugfix on
18523 o Minor bugfixes (controller):
18524 - Avoid sending a garbage value to the controller when a circuit is
18525 cannibalized. Fixes bug 11519; bugfix on 0.2.3.11-alpha.
18527 o Minor bugfixes (tor-fw-helper):
18528 - Allow tor-fw-helper to build again by adding src/ext to its
18529 CPPFLAGS. Fixes bug 11296; bugfix on 0.2.5.3-alpha.
18531 o Minor bugfixes (bridges):
18532 - Avoid potential crashes or bad behavior when launching a
18533 server-side managed proxy with ORPort or ExtORPort temporarily
18534 disabled. Fixes bug 9650; bugfix on 0.2.3.16-alpha.
18536 o Minor bugfixes (platform-specific):
18537 - Fix compilation on Solaris, which does not have <endian.h>. Fixes
18538 bug 11426; bugfix on 0.2.5.3-alpha.
18539 - When dumping a malformed directory object to disk, save it in
18540 binary mode on Windows, not text mode. Fixes bug 11342; bugfix on
18542 - Don't report failures from make_socket_reuseable() on incoming
18543 sockets on OSX: this can happen when incoming connections close
18544 early. Fixes bug 10081.
18546 o Minor bugfixes (trivial memory leaks):
18547 - Fix a small memory leak when signing a directory object. Fixes bug
18548 11275; bugfix on 0.2.4.13-alpha.
18549 - Free placeholder entries in our circuit table at exit; fixes a
18550 harmless memory leak. Fixes bug 11278; bugfix on 0.2.5.1-alpha.
18551 - Don't re-initialize a second set of OpenSSL mutexes when starting
18552 up. Previously, we'd make one set of mutexes, and then immediately
18553 replace them with another. Fixes bug 11726; bugfix on
18555 - Resolve some memory leaks found by coverity in the unit tests, on
18556 exit in tor-gencert, and on a failure to compute digests for our
18557 own keys when generating a v3 networkstatus vote. These leaks
18558 should never have affected anyone in practice.
18560 o Minor bugfixes (hidden service):
18561 - Only retry attempts to connect to a chosen rendezvous point 8
18562 times, not 30. Fixes bug 4241; bugfix on 0.1.0.1-rc.
18564 o Minor bugfixes (misc code correctness):
18565 - Fix various instances of undefined behavior in channeltls.c,
18566 tor_memmem(), and eventdns.c that would cause us to construct
18567 pointers to memory outside an allocated object. (These invalid
18568 pointers were not accessed, but C does not even allow them to
18569 exist.) Fixes bug 10363; bugfixes on 0.1.1.1-alpha, 0.1.2.1-alpha,
18570 0.2.0.10-alpha, and 0.2.3.6-alpha. Reported by "bobnomnom".
18571 - Use the AddressSanitizer and Ubsan sanitizers (in clang-3.4) to
18572 fix some miscellaneous errors in our tests and codebase. Fixes bug
18573 11232. Bugfixes on versions back as far as 0.2.1.11-alpha.
18574 - Always check return values for unlink, munmap, UnmapViewOfFile;
18575 check strftime return values more often. In some cases all we can
18576 do is report a warning, but this may help prevent deeper bugs from
18577 going unnoticed. Closes ticket 8787; bugfixes on many, many tor
18579 - Fix numerous warnings from the clang "scan-build" static analyzer.
18580 Some of these are programming style issues; some of them are false
18581 positives that indicated awkward code; some are undefined behavior
18582 cases related to constructing (but not using) invalid pointers;
18583 some are assumptions about API behavior; some are (harmlessly)
18584 logging sizeof(ptr) bytes from a token when sizeof(*ptr) would be
18585 correct; and one or two are genuine bugs that weren't reachable
18586 from the rest of the program. Fixes bug 8793; bugfixes on many,
18590 - Build the torify.1 manpage again. Previously, we were only trying
18591 to build it when also building tor-fw-helper. That's why we didn't
18592 notice that we'd broken the ability to build it. Fixes bug 11321;
18593 bugfix on 0.2.5.1-alpha.
18594 - Fix the layout of the SOCKSPort flags in the manpage. Fixes bug
18595 11061; bugfix on 0.2.4.7-alpha.
18596 - Correctly document that we search for a system torrc file before
18597 looking in ~/.torrc. Fixes documentation side of 9213; bugfix on
18599 - Resolve warnings from Doxygen.
18601 o Code simplifications and refactoring:
18602 - Remove is_internal_IP() function. Resolves ticket 4645.
18603 - Remove unused function circuit_dump_by_chan from circuitlist.c.
18604 Closes issue 9107; patch from "marek".
18605 - Change our use of the ENUM_BF macro to avoid declarations that
18608 o Deprecated versions:
18609 - Tor 0.2.2.x has reached end-of-life; it has received no patches or
18610 attention for some while. Directory authorities no longer accept
18611 descriptors from relays running any version of Tor prior to Tor
18612 0.2.3.16-alpha. Resolves ticket 11149.
18615 - New macros in test.h to simplify writing mock-functions for unit
18616 tests. Part of ticket 11507. Patch from Dana Koch.
18617 - Complete tests for the status.c module. Resolves ticket 11507.
18618 Patch from Dana Koch.
18621 - Remove all code for the long unused v1 directory protocol.
18622 Resolves ticket 11070.
18625 Changes in version 0.2.5.3-alpha - 2014-03-22
18626 Tor 0.2.5.3-alpha includes all the fixes from 0.2.4.21. It contains
18627 two new anti-DoS features for Tor relays, resolves a bug that kept
18628 SOCKS5 support for IPv6 from working, fixes several annoying usability
18629 issues for bridge users, and removes more old code for unused
18632 The Tor 0.2.5.x release series is now in patch-freeze: no feature
18633 patches not already written will be considered for inclusion in 0.2.5.x.
18635 o Major features (relay security, DoS-resistance):
18636 - When deciding whether we have run out of memory and we need to
18637 close circuits, also consider memory allocated in buffers for
18638 streams attached to each circuit.
18640 This change, which extends an anti-DoS feature introduced in
18641 0.2.4.13-alpha and improved in 0.2.4.14-alpha, lets Tor exit relays
18642 better resist more memory-based DoS attacks than before. Since the
18643 MaxMemInCellQueues option now applies to all queues, it is renamed
18644 to MaxMemInQueues. This feature fixes bug 10169.
18645 - Avoid hash-flooding denial-of-service attacks by using the secure
18646 SipHash-2-4 hash function for our hashtables. Without this
18647 feature, an attacker could degrade performance of a targeted
18648 client or server by flooding their data structures with a large
18649 number of entries to be stored at the same hash table position,
18650 thereby slowing down the Tor instance. With this feature, hash
18651 table positions are derived from a randomized cryptographic key,
18652 and an attacker cannot predict which entries will collide. Closes
18654 - Decrease the lower limit of MaxMemInQueues to 256 MBytes (but leave
18655 the default at 8GBytes), to better support Raspberry Pi users. Fixes
18656 bug 9686; bugfix on 0.2.4.14-alpha.
18658 o Minor features (bridges, pluggable transports):
18659 - Bridges now write the SHA1 digest of their identity key
18660 fingerprint (that is, a hash of a hash of their public key) to
18661 notice-level logs, and to a new hashed-fingerprint file. This
18662 information will help bridge operators look up their bridge in
18663 Globe and similar tools. Resolves ticket 10884.
18664 - Improve the message that Tor displays when running as a bridge
18665 using pluggable transports without an Extended ORPort listener.
18666 Also, log the message in the log file too. Resolves ticket 11043.
18668 o Minor features (other):
18669 - Add a new option, PredictedPortsRelevanceTime, to control how long
18670 after having received a request to connect to a given port Tor
18671 will try to keep circuits ready in anticipation of future requests
18672 for that port. Patch from "unixninja92"; implements ticket 9176.
18673 - Generate a warning if any ports are listed in the SocksPolicy,
18674 DirPolicy, AuthDirReject, AuthDirInvalid, AuthDirBadDir, or
18675 AuthDirBadExit options. (These options only support address
18676 ranges.) Fixes part of ticket 11108.
18677 - Update geoip and geoip6 to the February 7 2014 Maxmind GeoLite2
18680 o Minor bugfixes (new since 0.2.5.2-alpha, also in 0.2.4.21):
18681 - Build without warnings under clang 3.4. (We have some macros that
18682 define static functions only some of which will get used later in
18683 the module. Starting with clang 3.4, these give a warning unless the
18684 unused attribute is set on them.) Resolves ticket 10904.
18685 - Fix build warnings about missing "a2x" comment when building the
18686 manpages from scratch on OpenBSD; OpenBSD calls it "a2x.py".
18687 Fixes bug 10929; bugfix on 0.2.2.9-alpha. Patch from Dana Koch.
18689 o Minor bugfixes (client):
18690 - Improve the log message when we can't connect to a hidden service
18691 because all of the hidden service directory nodes hosting its
18692 descriptor are excluded. Improves on our fix for bug 10722, which
18693 was a bugfix on 0.2.0.10-alpha.
18694 - Raise a control port warning when we fail to connect to all of
18695 our bridges. Previously, we didn't inform the controller, and
18696 the bootstrap process would stall. Fixes bug 11069; bugfix on
18698 - Exit immediately when a process-owning controller exits.
18699 Previously, tor relays would wait for a little while after their
18700 controller exited, as if they had gotten an INT signal -- but this
18701 was problematic, since there was no feedback for the user. To do a
18702 clean shutdown, controllers should send an INT signal and give Tor
18703 a chance to clean up. Fixes bug 10449; bugfix on 0.2.2.28-beta.
18704 - Stop attempting to connect to bridges before our pluggable
18705 transports are configured (harmless but resulted in some erroneous
18706 log messages). Fixes bug 11156; bugfix on 0.2.3.2-alpha.
18707 - Fix connections to IPv6 addresses over SOCKS5. Previously, we were
18708 generating incorrect SOCKS5 responses, and confusing client
18709 applications. Fixes bug 10987; bugfix on 0.2.4.7-alpha.
18711 o Minor bugfixes (relays and bridges):
18712 - Avoid crashing on a malformed resolv.conf file when running a
18713 relay using Libevent 1. Fixes bug 8788; bugfix on 0.1.1.23.
18714 - Non-exit relays no longer launch mock DNS requests to check for
18715 DNS hijacking. This has been unnecessary since 0.2.1.7-alpha, when
18716 non-exit relays stopped servicing DNS requests. Fixes bug 965;
18717 bugfix on 0.2.1.7-alpha. Patch from Matt Pagan.
18718 - Bridges now report complete directory request statistics. Related
18719 to bug 5824; bugfix on 0.2.2.1-alpha.
18720 - Bridges now never collect statistics that were designed for
18721 relays. Fixes bug 5824; bugfix on 0.2.3.8-alpha.
18722 - Stop giving annoying warning messages when we decide not to launch
18723 a pluggable transport proxy that we don't need (because there are
18724 no bridges configured to use it). Resolves ticket 5018; bugfix
18726 - Give the correct URL in the warning message when trying to run a
18727 relay on an ancient version of Windows. Fixes bug 9393.
18729 o Minor bugfixes (backtrace support):
18730 - Support automatic backtraces on more platforms by using the
18731 "-fasynchronous-unwind-tables" compiler option. This option is
18732 needed for platforms like 32-bit Intel where "-fomit-frame-pointer"
18733 is on by default and table generation is not. This doesn't yet
18734 add Windows support; only Linux, OSX, and some BSDs are affected.
18735 Reported by 'cypherpunks'; fixes bug 11047; bugfix on 0.2.5.2-alpha.
18736 - Avoid strange behavior if two threads hit failed assertions at the
18737 same time and both try to log backtraces at once. (Previously, if
18738 this had happened, both threads would have stored their intermediate
18739 results in the same buffer, and generated junk outputs.) Reported by
18740 "cypherpunks". Fixes bug 11048; bugfix on 0.2.5.2-alpha.
18741 - Fix a compiler warning in format_number_sigsafe(). Bugfix on
18742 0.2.5.2-alpha; patch from Nick Hopper.
18744 o Minor bugfixes (unit tests):
18745 - Fix a small bug in the unit tests that might have made the tests
18746 call 'chmod' with an uninitialized bitmask. Fixes bug 10928;
18747 bugfix on 0.2.5.1-alpha. Patch from Dana Koch.
18750 - Remove all remaining code related to version-0 hidden service
18751 descriptors: they have not been in use since 0.2.2.1-alpha. Fixes
18752 the rest of bug 10841.
18755 - Document in the manpage that "KBytes" may also be written as
18756 "kilobytes" or "KB", that "Kbits" may also be written as
18757 "kilobits", and so forth. Closes ticket 9222.
18758 - Document that the ClientOnly config option overrides ORPort.
18759 Our old explanation made ClientOnly sound as though it did
18760 nothing at all. Resolves bug 9059.
18761 - Explain that SocksPolicy, DirPolicy, and similar options don't
18762 take port arguments. Fixes the other part of ticket 11108.
18763 - Fix a comment about the rend_server_descriptor_t.protocols field
18764 to more accurately describe its range. Also, make that field
18765 unsigned, to more accurately reflect its usage. Fixes bug 9099;
18766 bugfix on 0.2.1.5-alpha.
18767 - Fix the manpage's description of HiddenServiceAuthorizeClient:
18768 the maximum client name length is 16, not 19. Fixes bug 11118;
18769 bugfix on 0.2.1.6-alpha.
18771 o Code simplifications and refactoring:
18772 - Get rid of router->address, since in all cases it was just the
18773 string representation of router->addr. Resolves ticket 5528.
18775 o Test infrastructure:
18776 - Update to the latest version of tinytest.
18777 - Improve the tinytest implementation of string operation tests so
18778 that comparisons with NULL strings no longer crash the tests; they
18779 now just fail, normally. Fixes bug 9004; bugfix on 0.2.2.4-alpha.
18782 Changes in version 0.2.4.21 - 2014-02-28
18783 Tor 0.2.4.21 further improves security against potential adversaries who
18784 find breaking 1024-bit crypto doable, and backports several stability
18785 and robustness patches from the 0.2.5 branch.
18787 o Major features (client security):
18788 - When we choose a path for a 3-hop circuit, make sure it contains
18789 at least one relay that supports the NTor circuit extension
18790 handshake. Otherwise, there is a chance that we're building
18791 a circuit that's worth attacking by an adversary who finds
18792 breaking 1024-bit crypto doable, and that chance changes the game
18793 theory. Implements ticket 9777.
18796 - Do not treat streams that fail with reason
18797 END_STREAM_REASON_INTERNAL as indicating a definite circuit failure,
18798 since it could also indicate an ENETUNREACH connection error. Fixes
18799 part of bug 10777; bugfix on 0.2.4.8-alpha.
18801 o Code simplification and refactoring:
18802 - Remove data structures which were introduced to implement the
18803 CellStatistics option: they are now redundant with the new timestamp
18804 field in the regular packed_cell_t data structure, which we did
18805 in 0.2.4.18-rc in order to resolve bug 9093. Resolves ticket 10870.
18808 - Always clear OpenSSL bignums before freeing them -- even bignums
18809 that don't contain secrets. Resolves ticket 10793. Patch by
18811 - Build without warnings under clang 3.4. (We have some macros that
18812 define static functions only some of which will get used later in
18813 the module. Starting with clang 3.4, these give a warning unless the
18814 unused attribute is set on them.) Resolves ticket 10904.
18815 - Update geoip and geoip6 files to the February 7 2014 Maxmind
18816 GeoLite2 Country database.
18819 - Set the listen() backlog limit to the largest actually supported
18820 on the system, not to the value in a header file. Fixes bug 9716;
18821 bugfix on every released Tor.
18822 - Treat ENETUNREACH, EACCES, and EPERM connection failures at an
18823 exit node as a NOROUTE error, not an INTERNAL error, since they
18824 can apparently happen when trying to connect to the wrong sort
18825 of netblocks. Fixes part of bug 10777; bugfix on 0.1.0.1-rc.
18826 - Fix build warnings about missing "a2x" comment when building the
18827 manpages from scratch on OpenBSD; OpenBSD calls it "a2x.py".
18828 Fixes bug 10929; bugfix on 0.2.2.9-alpha. Patch from Dana Koch.
18829 - Avoid a segfault on SIGUSR1, where we had freed a connection but did
18830 not entirely remove it from the connection lists. Fixes bug 9602;
18831 bugfix on 0.2.4.4-alpha.
18832 - Fix a segmentation fault in our benchmark code when running with
18833 Fedora's OpenSSL package, or any other OpenSSL that provides
18834 ECDH but not P224. Fixes bug 10835; bugfix on 0.2.4.8-alpha.
18835 - Turn "circuit handshake stats since last time" log messages into a
18836 heartbeat message. Fixes bug 10485; bugfix on 0.2.4.17-rc.
18838 o Documentation fixes:
18839 - Document that all but one DirPort entry must have the NoAdvertise
18840 flag set. Fixes bug 10470; bugfix on 0.2.3.3-alpha / 0.2.3.16-alpha.
18843 Changes in version 0.2.5.2-alpha - 2014-02-13
18844 Tor 0.2.5.2-alpha includes all the fixes from 0.2.4.18-rc and 0.2.4.20,
18845 like the "poor random number generation" fix and the "building too many
18846 circuits" fix. It also further improves security against potential
18847 adversaries who find breaking 1024-bit crypto doable, and launches
18848 pluggable transports on demand (which gets us closer to integrating
18849 pluggable transport support by default -- not to be confused with Tor
18850 bundles enabling pluggable transports and bridges by default).
18852 o Major features (client security):
18853 - When we choose a path for a 3-hop circuit, make sure it contains
18854 at least one relay that supports the NTor circuit extension
18855 handshake. Otherwise, there is a chance that we're building
18856 a circuit that's worth attacking by an adversary who finds
18857 breaking 1024-bit crypto doable, and that chance changes the game
18858 theory. Implements ticket 9777.
18859 - Clients now look at the "usecreatefast" consensus parameter to
18860 decide whether to use CREATE_FAST or CREATE cells for the first hop
18861 of their circuit. This approach can improve security on connections
18862 where Tor's circuit handshake is stronger than the available TLS
18863 connection security levels, but the tradeoff is more computational
18864 load on guard relays. Implements proposal 221. Resolves ticket 9386.
18866 o Major features (bridges):
18867 - Don't launch pluggable transport proxies if we don't have any
18868 bridges configured that would use them. Now we can list many
18869 pluggable transports, and Tor will dynamically start one when it
18870 hears a bridge address that needs it. Resolves ticket 5018.
18871 - The bridge directory authority now assigns status flags (Stable,
18872 Guard, etc) to bridges based on thresholds calculated over all
18873 Running bridges. Now bridgedb can finally make use of its features
18874 to e.g. include at least one Stable bridge in its answers. Fixes
18877 o Major features (other):
18878 - Extend ORCONN controller event to include an "ID" parameter,
18879 and add four new controller event types CONN_BW, CIRC_BW,
18880 CELL_STATS, and TB_EMPTY that show connection and circuit usage.
18881 The new events are emitted in private Tor networks only, with the
18882 goal of being able to better track performance and load during
18883 full-network simulations. Implements proposal 218 and ticket 7359.
18884 - On some platforms (currently: recent OSX versions, glibc-based
18885 platforms that support the ELF format, and a few other
18886 Unix-like operating systems), Tor can now dump stack traces
18887 when a crash occurs or an assertion fails. By default, traces
18888 are dumped to stderr (if possible) and to any logs that are
18889 reporting errors. Implements ticket 9299.
18892 - Avoid a segfault on SIGUSR1, where we had freed a connection but did
18893 not entirely remove it from the connection lists. Fixes bug 9602;
18894 bugfix on 0.2.4.4-alpha.
18895 - Do not treat streams that fail with reason
18896 END_STREAM_REASON_INTERNAL as indicating a definite circuit failure,
18897 since it could also indicate an ENETUNREACH connection error. Fixes
18898 part of bug 10777; bugfix on 0.2.4.8-alpha.
18900 o Major bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.20):
18901 - Do not allow OpenSSL engines to replace the PRNG, even when
18902 HardwareAccel is set. The only default builtin PRNG engine uses
18903 the Intel RDRAND instruction to replace the entire PRNG, and
18904 ignores all attempts to seed it with more entropy. That's
18905 cryptographically stupid: the right response to a new alleged
18906 entropy source is never to discard all previously used entropy
18907 sources. Fixes bug 10402; works around behavior introduced in
18908 OpenSSL 1.0.0. Diagnosis and investigation thanks to "coderman"
18910 - Fix assertion failure when AutomapHostsOnResolve yields an IPv6
18911 address. Fixes bug 10465; bugfix on 0.2.4.7-alpha.
18912 - Avoid launching spurious extra circuits when a stream is pending.
18913 This fixes a bug where any circuit that _wasn't_ unusable for new
18914 streams would be treated as if it were, causing extra circuits to
18915 be launched. Fixes bug 10456; bugfix on 0.2.4.12-alpha.
18917 o Major bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
18918 - No longer stop reading or writing on cpuworker connections when
18919 our rate limiting buckets go empty. Now we should handle circuit
18920 handshake requests more promptly. Resolves bug 9731.
18921 - Stop trying to bootstrap all our directory information from
18922 only our first guard. Discovered while fixing bug 9946; bugfix
18925 o Minor features (bridges, pluggable transports):
18926 - Add threshold cutoffs to the networkstatus document created by
18927 the Bridge Authority. Fixes bug 1117.
18928 - On Windows, spawn background processes using the CREATE_NO_WINDOW
18929 flag. Now Tor Browser Bundle 3.5 with pluggable transports enabled
18930 doesn't pop up a blank console window. (In Tor Browser Bundle 2.x,
18931 Vidalia set this option for us.) Implements ticket 10297.
18933 o Minor features (security):
18934 - Always clear OpenSSL bignums before freeing them -- even bignums
18935 that don't contain secrets. Resolves ticket 10793. Patch by
18938 o Minor features (config options and command line):
18939 - Add an --allow-missing-torrc commandline option that tells Tor to
18940 run even if the configuration file specified by -f is not available.
18941 Implements ticket 10060.
18942 - Add support for the TPROXY transparent proxying facility on Linux.
18943 See documentation for the new TransProxyType option for more
18944 details. Implementation by "thomo". Closes ticket 10582.
18946 o Minor features (controller):
18947 - Add a new "HS_DESC" controller event that reports activities
18948 related to hidden service descriptors. Resolves ticket 8510.
18949 - New "DROPGUARDS" controller command to forget all current entry
18950 guards. Not recommended for ordinary use, since replacing guards
18951 too frequently makes several attacks easier. Resolves ticket 9934;
18954 o Minor features (build):
18955 - Assume that a user using ./configure --host wants to cross-compile,
18956 and give an error if we cannot find a properly named
18957 tool-chain. Add a --disable-tool-name-check option to proceed
18958 nevertheless. Addresses ticket 9869. Patch by Benedikt Gollatz.
18959 - If we run ./configure and the compiler recognizes -fstack-protector
18960 but the linker rejects it, warn the user about a potentially missing
18961 libssp package. Addresses ticket 9948. Patch from Benedikt Gollatz.
18963 o Minor features (testing):
18964 - If Python is installed, "make check" now runs extra tests beyond
18965 the unit test scripts.
18966 - When bootstrapping a test network, sometimes very few relays get
18967 the Guard flag. Now a new option "TestingDirAuthVoteGuard" can
18968 specify a set of relays which should be voted Guard regardless of
18969 their uptime or bandwidth. Addresses ticket 9206.
18971 o Minor features (log messages):
18972 - When ServerTransportPlugin is set on a bridge, Tor can write more
18973 useful statistics about bridge use in its extrainfo descriptors,
18974 but only if the Extended ORPort ("ExtORPort") is set too. Add a
18975 log message to inform the user in this case. Resolves ticket 9651.
18976 - When receiving a new controller connection, log the origin address.
18977 Resolves ticket 9698; patch from "sigpipe".
18978 - When logging OpenSSL engine status at startup, log the status of
18979 more engines. Fixes ticket 10043; patch from Joshua Datko.
18980 - Turn "circuit handshake stats since last time" log messages into a
18981 heartbeat message. Fixes bug 10485; bugfix on 0.2.4.17-rc.
18983 o Minor features (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
18984 - Improve the circuit queue out-of-memory handler. Previously, when
18985 we ran low on memory, we'd close whichever circuits had the most
18986 queued cells. Now, we close those that have the *oldest* queued
18987 cells, on the theory that those are most responsible for us
18988 running low on memory. Based on analysis from a forthcoming paper
18989 by Jansen, Tschorsch, Johnson, and Scheuermann. Fixes bug 9093.
18990 - Generate bootstrapping status update events correctly when fetching
18991 microdescriptors. Fixes bug 9927.
18992 - Update to the October 2 2013 Maxmind GeoLite Country database.
18994 o Minor bugfixes (clients):
18995 - When closing a channel that has already been open, do not close
18996 pending circuits that were waiting to connect to the same relay.
18997 Fixes bug 9880; bugfix on 0.2.5.1-alpha. Thanks to skruffy for
19000 o Minor bugfixes (relays):
19001 - Treat ENETUNREACH, EACCES, and EPERM connection failures at an
19002 exit node as a NOROUTE error, not an INTERNAL error, since they
19003 can apparently happen when trying to connect to the wrong sort
19004 of netblocks. Fixes part of bug 10777; bugfix on 0.1.0.1-rc.
19006 o Minor bugfixes (bridges):
19007 - Fix a bug where the first connection works to a bridge that uses a
19008 pluggable transport with client-side parameters, but we don't send
19009 the client-side parameters on subsequent connections. (We don't
19010 use any pluggable transports with client-side parameters yet,
19011 but ScrambleSuit will soon become the first one.) Fixes bug 9162;
19012 bugfix on 0.2.0.3-alpha. Based on a patch from "rl1987".
19014 o Minor bugfixes (node selection):
19015 - If ExcludeNodes is set, consider non-excluded hidden service
19016 directory servers before excluded ones. Do not consider excluded
19017 hidden service directory servers at all if StrictNodes is
19018 set. (Previously, we would sometimes decide to connect to those
19019 servers, and then realize before we initiated a connection that
19020 we had excluded them.) Fixes bug 10722; bugfix on 0.2.0.10-alpha.
19021 Reported by "mr-4".
19022 - If we set the ExitNodes option but it doesn't include any nodes
19023 that have the Exit flag, we would choose not to bootstrap. Now we
19024 bootstrap so long as ExitNodes includes nodes which can exit to
19025 some port. Fixes bug 10543; bugfix on 0.2.4.10-alpha.
19027 o Minor bugfixes (controller and command-line):
19028 - If changing a config option via "setconf" fails in a recoverable
19029 way, we used to nonetheless write our new control ports to the
19030 file described by the "ControlPortWriteToFile" option. Now we only
19031 write out that file if we successfully switch to the new config
19032 option. Fixes bug 5605; bugfix on 0.2.2.26-beta. Patch from "Ryman".
19033 - When a command-line option such as --version or --help that
19034 ordinarily implies --hush appears on the command line along with
19035 --quiet, then actually obey --quiet. Previously, we obeyed --quiet
19036 only if it appeared later on the command line. Fixes bug 9578;
19037 bugfix on 0.2.5.1-alpha.
19039 o Minor bugfixes (code correctness):
19040 - Previously we used two temporary files when writing descriptors to
19041 disk; now we only use one. Fixes bug 1376.
19042 - Remove an erroneous (but impossible and thus harmless) pointer
19043 comparison that would have allowed compilers to skip a bounds
19044 check in channeltls.c. Fixes bugs 10313 and 9980; bugfix on
19045 0.2.0.10-alpha. Noticed by Jared L Wong and David Fifield.
19046 - Fix an always-true assertion in pluggable transports code so it
19047 actually checks what it was trying to check. Fixes bug 10046;
19048 bugfix on 0.2.3.9-alpha. Found by "dcb".
19050 o Minor bugfixes (protocol correctness):
19051 - When receiving a VERSIONS cell with an odd number of bytes, close
19052 the connection immediately since the cell is malformed. Fixes bug
19053 10365; bugfix on 0.2.0.10-alpha. Spotted by "bobnomnom"; fix by
19056 o Minor bugfixes (build):
19057 - Restore the ability to compile Tor with V2_HANDSHAKE_SERVER
19058 turned off (that is, without support for v2 link handshakes). Fixes
19059 bug 4677; bugfix on 0.2.3.2-alpha. Patch from "piet".
19060 - Fix compilation warnings and startup issues when running with
19061 "Sandbox 1" and libseccomp-2.1.0. Fixes bug 10563; bugfix on
19063 - Fix compilation on Solaris 9, which didn't like us having an
19064 identifier named "sun". Fixes bug 10565; bugfix in 0.2.5.1-alpha.
19066 o Minor bugfixes (testing):
19067 - Fix a segmentation fault in our benchmark code when running with
19068 Fedora's OpenSSL package, or any other OpenSSL that provides
19069 ECDH but not P224. Fixes bug 10835; bugfix on 0.2.4.8-alpha.
19071 o Minor bugfixes (log messages):
19072 - Fix a bug where clients using bridges would report themselves
19073 as 50% bootstrapped even without a live consensus document.
19074 Fixes bug 9922; bugfix on 0.2.1.1-alpha.
19075 - Suppress a warning where, if there's only one directory authority
19076 in the network, we would complain that votes and signatures cannot
19077 be uploaded to other directory authorities. Fixes bug 10842;
19078 bugfix on 0.2.2.26-beta.
19079 - Report bootstrapping progress correctly when we're downloading
19080 microdescriptors. We had updated our "do we have enough microdescs
19081 to begin building circuits?" logic most recently in 0.2.4.10-alpha
19082 (see bug 5956), but we left the bootstrap status event logic at
19083 "how far through getting 1/4 of them are we?" Fixes bug 9958;
19084 bugfix on 0.2.2.36, which is where they diverged (see bug 5343).
19086 o Minor bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.20):
19087 - Avoid a crash bug when starting with a corrupted microdescriptor
19088 cache file. Fixes bug 10406; bugfix on 0.2.2.6-alpha.
19089 - If we fail to dump a previously cached microdescriptor to disk, avoid
19090 freeing duplicate data later on. Fixes bug 10423; bugfix on
19091 0.2.4.13-alpha. Spotted by "bobnomnom".
19093 o Minor bugfixes on 0.2.4.x (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
19094 - Correctly log long IPv6 exit policies, instead of truncating them
19095 or reporting an error. Fixes bug 9596; bugfix on 0.2.4.7-alpha.
19096 - Our default TLS ecdhe groups were backwards: we meant to be using
19097 P224 for relays (for performance win) and P256 for bridges (since
19098 it is more common in the wild). Instead we had it backwards. After
19099 reconsideration, we decided that the default should be P256 on all
19100 hosts, since its security is probably better, and since P224 is
19101 reportedly used quite little in the wild. Found by "skruffy" on
19102 IRC. Fix for bug 9780; bugfix on 0.2.4.8-alpha.
19103 - Free directory authority certificate download statuses on exit
19104 rather than leaking them. Fixes bug 9644; bugfix on 0.2.4.13-alpha.
19106 o Minor bugfixes on 0.2.3.x (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
19107 - If the guard we choose first doesn't answer, we would try the
19108 second guard, but once we connected to the second guard we would
19109 abandon it and retry the first one, slowing down bootstrapping.
19110 The fix is to treat all our initially chosen guards as acceptable
19111 to use. Fixes bug 9946; bugfix on 0.1.1.11-alpha.
19112 - Fix an assertion failure that would occur when disabling the
19113 ORPort setting on a running Tor process while accounting was
19114 enabled. Fixes bug 6979; bugfix on 0.2.2.18-alpha.
19115 - When examining the list of network interfaces to find our address,
19116 do not consider non-running or disabled network interfaces. Fixes
19117 bug 9904; bugfix on 0.2.3.11-alpha. Patch from "hantwister".
19118 - Avoid an off-by-one error when checking buffer boundaries when
19119 formatting the exit status of a pluggable transport helper.
19120 This is probably not an exploitable bug, but better safe than
19121 sorry. Fixes bug 9928; bugfix on 0.2.3.18-rc. Bug found by
19124 o Removed code and features:
19125 - Clients now reject any directory authority certificates lacking
19126 a dir-key-crosscert element. These have been included since
19127 0.2.1.9-alpha, so there's no real reason for them to be optional
19128 any longer. Completes proposal 157. Resolves ticket 10162.
19129 - Remove all code that existed to support the v2 directory system,
19130 since there are no longer any v2 directory authorities. Resolves
19132 - Remove the HSAuthoritativeDir and AlternateHSAuthority torrc
19133 options, which were used for designating authorities as "Hidden
19134 service authorities". There has been no use of hidden service
19135 authorities since 0.2.2.1-alpha, when we stopped uploading or
19136 downloading v0 hidden service descriptors. Fixes bug 10881; also
19137 part of a fix for bug 10841.
19139 o Code simplification and refactoring:
19140 - Remove some old fallback code designed to keep Tor clients working
19141 in a network with only two working relays. Elsewhere in the code we
19142 have long since stopped supporting such networks, so there wasn't
19143 much point in keeping it around. Addresses ticket 9926.
19144 - Reject 0-length EXTEND2 cells more explicitly. Fixes bug 10536;
19145 bugfix on 0.2.4.8-alpha. Reported by "cypherpunks".
19146 - Remove data structures which were introduced to implement the
19147 CellStatistics option: they are now redundant with the addition
19148 of a timestamp to the regular packed_cell_t data structure, which
19149 we did in 0.2.4.18-rc in order to resolve ticket 9093. Implements
19152 o Documentation (man page) fixes:
19153 - Update manpage to describe some of the files you can expect to
19154 find in Tor's DataDirectory. Addresses ticket 9839.
19155 - Document that all but one DirPort entry must have the NoAdvertise
19156 flag set. Fixes bug 10470; bugfix on 0.2.3.3-alpha / 0.2.3.16-alpha.
19158 o Documentation fixes (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
19159 - Clarify the usage and risks of setting the ContactInfo torrc line
19160 for your relay or bridge. Resolves ticket 9854.
19161 - Add anchors to the manpage so we can link to the html version of
19162 the documentation for specific options. Resolves ticket 9866.
19163 - Replace remaining references to DirServer in man page and
19164 log entries. Resolves ticket 10124.
19167 - Make the "tor-gencert" tool used by directory authority operators
19168 create 2048-bit signing keys by default (rather than 1024-bit, since
19169 1024-bit is uncomfortably small these days). Addresses ticket 10324.
19172 Changes in version 0.2.4.20 - 2013-12-22
19173 Tor 0.2.4.20 fixes potentially poor random number generation for users
19174 who 1) use OpenSSL 1.0.0 or later, 2) set "HardwareAccel 1" in their
19175 torrc file, 3) have "Sandy Bridge" or "Ivy Bridge" Intel processors,
19176 and 4) have no state file in their DataDirectory (as would happen on
19177 first start). Users who generated relay or hidden service identity
19178 keys in such a situation should discard them and generate new ones.
19180 This release also fixes a logic error that caused Tor clients to build
19181 many more preemptive circuits than they actually need.
19184 - Do not allow OpenSSL engines to replace the PRNG, even when
19185 HardwareAccel is set. The only default builtin PRNG engine uses
19186 the Intel RDRAND instruction to replace the entire PRNG, and
19187 ignores all attempts to seed it with more entropy. That's
19188 cryptographically stupid: the right response to a new alleged
19189 entropy source is never to discard all previously used entropy
19190 sources. Fixes bug 10402; works around behavior introduced in
19191 OpenSSL 1.0.0. Diagnosis and investigation thanks to "coderman"
19193 - Fix assertion failure when AutomapHostsOnResolve yields an IPv6
19194 address. Fixes bug 10465; bugfix on 0.2.4.7-alpha.
19195 - Avoid launching spurious extra circuits when a stream is pending.
19196 This fixes a bug where any circuit that _wasn't_ unusable for new
19197 streams would be treated as if it were, causing extra circuits to
19198 be launched. Fixes bug 10456; bugfix on 0.2.4.12-alpha.
19201 - Avoid a crash bug when starting with a corrupted microdescriptor
19202 cache file. Fixes bug 10406; bugfix on 0.2.2.6-alpha.
19203 - If we fail to dump a previously cached microdescriptor to disk, avoid
19204 freeing duplicate data later on. Fixes bug 10423; bugfix on
19205 0.2.4.13-alpha. Spotted by "bobnomnom".
19208 Changes in version 0.2.4.19 - 2013-12-11
19209 The Tor 0.2.4 release series is dedicated to the memory of Aaron Swartz
19210 (1986-2013). Aaron worked on diverse projects including helping to guide
19211 Creative Commons, playing a key role in stopping SOPA/PIPA, bringing
19212 transparency to the U.S government's PACER documents, and contributing
19213 design and development for Tor and Tor2Web. Aaron was one of the latest
19214 martyrs in our collective fight for civil liberties and human rights,
19215 and his death is all the more painful because he was one of us.
19217 Tor 0.2.4.19, the first stable release in the 0.2.4 branch, features
19218 a new circuit handshake and link encryption that use ECC to provide
19219 better security and efficiency; makes relays better manage circuit
19220 creation requests; uses "directory guards" to reduce client enumeration
19221 risks; makes bridges collect and report statistics about the pluggable
19222 transports they support; cleans up and improves our geoip database;
19223 gets much closer to IPv6 support for clients, bridges, and relays; makes
19224 directory authorities use measured bandwidths rather than advertised
19225 ones when computing flags and thresholds; disables client-side DNS
19226 caching to reduce tracking risks; and fixes a big bug in bridge
19227 reachability testing. This release introduces two new design
19228 abstractions in the code: a new "channel" abstraction between circuits
19229 and or_connections to allow for implementing alternate relay-to-relay
19230 transports, and a new "circuitmux" abstraction storing the queue of
19231 circuits for a channel. The release also includes many stability,
19232 security, and privacy fixes.
19235 Changes in version 0.2.4.18-rc - 2013-11-16
19236 Tor 0.2.4.18-rc is the fourth release candidate for the Tor 0.2.4.x
19237 series. It takes a variety of fixes from the 0.2.5.x branch to improve
19238 stability, performance, and better handling of edge cases.
19241 - Re-enable TLS 1.1 and 1.2 when built with OpenSSL 1.0.1e or later.
19242 Resolves ticket 6055. (OpenSSL before 1.0.1 didn't have TLS 1.1 or
19243 1.2, and OpenSSL from 1.0.1 through 1.0.1d had bugs that prevented
19244 renegotiation from working with TLS 1.1 or 1.2, so we had disabled
19245 them to solve bug 6033.)
19248 - No longer stop reading or writing on cpuworker connections when
19249 our rate limiting buckets go empty. Now we should handle circuit
19250 handshake requests more promptly. Resolves bug 9731.
19251 - If we are unable to save a microdescriptor to the journal, do not
19252 drop it from memory and then reattempt downloading it. Fixes bug
19253 9645; bugfix on 0.2.2.6-alpha.
19254 - Stop trying to bootstrap all our directory information from
19255 only our first guard. Discovered while fixing bug 9946; bugfix
19257 - The new channel code sometimes lost track of in-progress circuits,
19258 causing long-running clients to stop building new circuits. The
19259 fix is to always call circuit_n_chan_done(chan, 0) from
19260 channel_closed(). Fixes bug 9776; bugfix on 0.2.4.17-rc.
19262 o Minor bugfixes (on 0.2.4.x):
19263 - Correctly log long IPv6 exit policies, instead of truncating them
19264 or reporting an error. Fixes bug 9596; bugfix on 0.2.4.7-alpha.
19265 - Our default TLS ecdhe groups were backwards: we meant to be using
19266 P224 for relays (for performance win) and P256 for bridges (since
19267 it is more common in the wild). Instead we had it backwards. After
19268 reconsideration, we decided that the default should be P256 on all
19269 hosts, since its security is probably better, and since P224 is
19270 reportedly used quite little in the wild. Found by "skruffy" on
19271 IRC. Fix for bug 9780; bugfix on 0.2.4.8-alpha.
19272 - Free directory authority certificate download statuses on exit
19273 rather than leaking them. Fixes bug 9644; bugfix on 0.2.4.13-alpha.
19275 o Minor bugfixes (on 0.2.3.x and earlier):
19276 - If the guard we choose first doesn't answer, we would try the
19277 second guard, but once we connected to the second guard we would
19278 abandon it and retry the first one, slowing down bootstrapping.
19279 The fix is to treat all our initially chosen guards as acceptable
19280 to use. Fixes bug 9946; bugfix on 0.1.1.11-alpha.
19281 - Fix an assertion failure that would occur when disabling the
19282 ORPort setting on a running Tor process while accounting was
19283 enabled. Fixes bug 6979; bugfix on 0.2.2.18-alpha.
19284 - When examining the list of network interfaces to find our address,
19285 do not consider non-running or disabled network interfaces. Fixes
19286 bug 9904; bugfix on 0.2.3.11-alpha. Patch from "hantwister".
19287 - Avoid an off-by-one error when checking buffer boundaries when
19288 formatting the exit status of a pluggable transport helper.
19289 This is probably not an exploitable bug, but better safe than
19290 sorry. Fixes bug 9928; bugfix on 0.2.3.18-rc. Bug found by
19293 o Minor features (protecting client timestamps):
19294 - Clients no longer send timestamps in their NETINFO cells. These were
19295 not used for anything, and they provided one small way for clients
19296 to be distinguished from each other as they moved from network to
19297 network or behind NAT. Implements part of proposal 222.
19298 - Clients now round timestamps in INTRODUCE cells down to the nearest
19299 10 minutes. If a new Support022HiddenServices option is set to 0, or
19300 if it's set to "auto" and the feature is disabled in the consensus,
19301 the timestamp is sent as 0 instead. Implements part of proposal 222.
19302 - Stop sending timestamps in AUTHENTICATE cells. This is not such
19303 a big deal from a security point of view, but it achieves no actual
19304 good purpose, and isn't needed. Implements part of proposal 222.
19305 - Reduce down accuracy of timestamps in hidden service descriptors.
19306 Implements part of proposal 222.
19308 o Minor features (other):
19309 - Improve the circuit queue out-of-memory handler. Previously, when
19310 we ran low on memory, we'd close whichever circuits had the most
19311 queued cells. Now, we close those that have the *oldest* queued
19312 cells, on the theory that those are most responsible for us
19313 running low on memory. Based on analysis from a forthcoming paper
19314 by Jansen, Tschorsch, Johnson, and Scheuermann. Fixes bug 9093.
19315 - Generate bootstrapping status update events correctly when fetching
19316 microdescriptors. Fixes bug 9927.
19317 - Update to the October 2 2013 Maxmind GeoLite Country database.
19319 o Documentation fixes:
19320 - Clarify the usage and risks of setting the ContactInfo torrc line
19321 for your relay or bridge. Resolves ticket 9854.
19322 - Add anchors to the manpage so we can link to the html version of
19323 the documentation for specific options. Resolves ticket 9866.
19324 - Replace remaining references to DirServer in man page and
19325 log entries. Resolves ticket 10124.
19328 Changes in version 0.2.5.1-alpha - 2013-10-02
19329 Tor 0.2.5.1-alpha introduces experimental support for syscall sandboxing
19330 on Linux, allows bridges that offer pluggable transports to report usage
19331 statistics, fixes many issues to make testing easier, and provides
19332 a pile of minor features and bugfixes that have been waiting for a
19333 release of the new branch.
19335 This is the first alpha release in a new series, so expect there to
19336 be bugs. Users who would rather test out a more stable branch should
19337 stay with 0.2.4.x for now.
19339 o Major features (security):
19340 - Use the seccomp2 syscall filtering facility on Linux to limit
19341 which system calls Tor can invoke. This is an experimental,
19342 Linux-only feature to provide defense-in-depth against unknown
19343 attacks. To try turning it on, set "Sandbox 1" in your torrc
19344 file. Please be ready to report bugs. We hope to add support
19345 for better sandboxing in the future, including more fine-grained
19346 filters, better division of responsibility, and support for more
19347 platforms. This work has been done by Cristian-Matei Toader for
19348 Google Summer of Code.
19349 - Re-enable TLS 1.1 and 1.2 when built with OpenSSL 1.0.1e or later.
19350 Resolves ticket 6055. (OpenSSL before 1.0.1 didn't have TLS 1.1 or
19351 1.2, and OpenSSL from 1.0.1 through 1.0.1d had bugs that prevented
19352 renegotiation from working with TLS 1.1 or 1.2, so we had disabled
19353 them to solve bug 6033.)
19355 o Major features (other):
19356 - Add support for passing arguments to managed pluggable transport
19357 proxies. Implements ticket 3594.
19358 - Bridges now track GeoIP information and the number of their users
19359 even when pluggable transports are in use, and report usage
19360 statistics in their extra-info descriptors. Resolves tickets 4773
19362 - Make testing Tor networks bootstrap better: lower directory fetch
19363 retry schedules and maximum interval without directory requests,
19364 and raise maximum download tries. Implements ticket 6752.
19365 - Add make target 'test-network' to run tests on a Chutney network.
19366 Implements ticket 8530.
19367 - The ntor handshake is now on-by-default, no matter what the
19368 directory authorities recommend. Implements ticket 8561.
19371 - Instead of writing destroy cells directly to outgoing connection
19372 buffers, queue them and intersperse them with other outgoing cells.
19373 This can prevent a set of resource starvation conditions where too
19374 many pending destroy cells prevent data cells from actually getting
19375 delivered. Reported by "oftc_must_be_destroyed". Fixes bug 7912;
19376 bugfix on 0.2.0.1-alpha.
19377 - If we are unable to save a microdescriptor to the journal, do not
19378 drop it from memory and then reattempt downloading it. Fixes bug
19379 9645; bugfix on 0.2.2.6-alpha.
19380 - The new channel code sometimes lost track of in-progress circuits,
19381 causing long-running clients to stop building new circuits. The
19382 fix is to always call circuit_n_chan_done(chan, 0) from
19383 channel_closed(). Fixes bug 9776; bugfix on 0.2.4.17-rc.
19386 - Tor now builds each source file in two modes: a mode that avoids
19387 exposing identifiers needlessly, and another mode that exposes
19388 more identifiers for testing. This lets the compiler do better at
19389 optimizing the production code, while enabling us to take more
19390 radical measures to let the unit tests test things.
19391 - The production builds no longer include functions used only in
19392 the unit tests; all functions exposed from a module only for
19393 unit-testing are now static in production builds.
19394 - Add an --enable-coverage configuration option to make the unit
19395 tests (and a new src/or/tor-cov target) to build with gcov test
19399 - We now have rudimentary function mocking support that our unit
19400 tests can use to test functions in isolation. Function mocking
19401 lets the tests temporarily replace a function's dependencies with
19402 stub functions, so that the tests can check the function without
19403 invoking the other functions it calls.
19404 - Add more unit tests for the <circid,channel>->circuit map, and
19405 the destroy-cell-tracking code to fix bug 7912.
19406 - Unit tests for failing cases of the TAP onion handshake.
19407 - More unit tests for address-manipulation functions.
19409 o Minor features (protecting client timestamps):
19410 - Clients no longer send timestamps in their NETINFO cells. These were
19411 not used for anything, and they provided one small way for clients
19412 to be distinguished from each other as they moved from network to
19413 network or behind NAT. Implements part of proposal 222.
19414 - Clients now round timestamps in INTRODUCE cells down to the nearest
19415 10 minutes. If a new Support022HiddenServices option is set to 0, or
19416 if it's set to "auto" and the feature is disabled in the consensus,
19417 the timestamp is sent as 0 instead. Implements part of proposal 222.
19418 - Stop sending timestamps in AUTHENTICATE cells. This is not such
19419 a big deal from a security point of view, but it achieves no actual
19420 good purpose, and isn't needed. Implements part of proposal 222.
19421 - Reduce down accuracy of timestamps in hidden service descriptors.
19422 Implements part of proposal 222.
19424 o Minor features (config options):
19425 - Config (torrc) lines now handle fingerprints which are missing
19426 their initial '$'. Resolves ticket 4341; improvement over 0.0.9pre5.
19427 - Support a --dump-config option to print some or all of the
19428 configured options. Mainly useful for debugging the command-line
19429 option parsing code. Helps resolve ticket 4647.
19430 - Raise awareness of safer logging: notify user of potentially
19431 unsafe config options, like logging more verbosely than severity
19432 "notice" or setting SafeLogging to 0. Resolves ticket 5584.
19433 - Add a new configuration option TestingV3AuthVotingStartOffset
19434 that bootstraps a network faster by changing the timing for
19435 consensus votes. Addresses ticket 8532.
19436 - Add a new torrc option "ServerTransportOptions" that allows
19437 bridge operators to pass configuration parameters to their
19438 pluggable transports. Resolves ticket 8929.
19439 - The config (torrc) file now accepts bandwidth and space limits in
19440 bits as well as bytes. (Anywhere that you can say "2 Kilobytes",
19441 you can now say "16 kilobits", and so on.) Resolves ticket 9214.
19444 o Minor features (build):
19445 - Add support for `--library-versions` flag. Implements ticket 6384.
19446 - Return the "unexpected sendme" warnings to a warn severity, but make
19447 them rate limited, to help diagnose ticket 8093.
19448 - Detect a missing asciidoc, and warn the user about it, during
19449 configure rather than at build time. Fixes issue 6506. Patch from
19452 o Minor features (other):
19453 - Use the SOCK_NONBLOCK socket type, if supported, to open nonblocking
19454 sockets in a single system call. Implements ticket 5129.
19455 - Log current accounting state (bytes sent and received + remaining
19456 time for the current accounting period) in the relay's heartbeat
19457 message. Implements ticket 5526; patch from Peter Retzlaff.
19458 - Implement the TRANSPORT_LAUNCHED control port event that
19459 notifies controllers about new launched pluggable
19460 transports. Resolves ticket 5609.
19461 - If we're using the pure-C 32-bit curve25519_donna implementation
19462 of curve25519, build it with the -fomit-frame-pointer option to
19463 make it go faster on register-starved hosts. This improves our
19464 handshake performance by about 6% on i386 hosts without nacl.
19465 Closes ticket 8109.
19466 - Update to the September 4 2013 Maxmind GeoLite Country database.
19469 - Set the listen() backlog limit to the largest actually supported
19470 on the system, not to the value in a header file. Fixes bug 9716;
19471 bugfix on every released Tor.
19472 - No longer accept malformed http headers when parsing urls from
19473 headers. Now we reply with Bad Request ("400"). Fixes bug 2767;
19474 bugfix on 0.0.6pre1.
19475 - In munge_extrainfo_into_routerinfo(), check the return value of
19476 memchr(). This would have been a serious issue if we ever passed
19477 it a non-extrainfo. Fixes bug 8791; bugfix on 0.2.0.6-alpha. Patch
19479 - On the chance that somebody manages to build Tor on a
19480 platform where time_t is unsigned, correct the way that
19481 microdesc_add_to_cache() handles negative time arguments.
19482 Fixes bug 8042; bugfix on 0.2.3.1-alpha.
19483 - Reject relative control socket paths and emit a warning. Previously,
19484 single-component control socket paths would be rejected, but Tor
19485 would not log why it could not validate the config. Fixes bug 9258;
19486 bugfix on 0.2.3.16-alpha.
19488 o Minor bugfixes (command line):
19489 - Use a single command-line parser for parsing torrc options on the
19490 command line and for finding special command-line options to avoid
19491 inconsistent behavior for torrc option arguments that have the same
19492 names as command-line options. Fixes bugs 4647 and 9578; bugfix on
19494 - No longer allow 'tor --hash-password' with no arguments. Fixes bug
19495 9573; bugfix on 0.0.9pre5.
19497 o Minor fixes (build, auxiliary programs):
19498 - Stop preprocessing the "torify" script with autoconf, since
19499 it no longer refers to LOCALSTATEDIR. Fixes bug 5505; patch
19501 - The tor-fw-helper program now follows the standard convention and
19502 exits with status code "0" on success. Fixes bug 9030; bugfix on
19503 0.2.3.1-alpha. Patch by Arlo Breault.
19504 - Corrected ./configure advice for what openssl dev package you should
19505 install on Debian. Fixes bug 9207; bugfix on 0.2.0.1-alpha.
19507 o Minor code improvements:
19508 - Remove constants and tests for PKCS1 padding; it's insecure and
19509 shouldn't be used for anything new. Fixes bug 8792; patch
19511 - Remove instances of strcpy() from the unit tests. They weren't
19512 hurting anything, since they were only in the unit tests, but it's
19513 embarrassing to have strcpy() in the code at all, and some analysis
19514 tools don't like it. Fixes bug 8790; bugfix on 0.2.3.6-alpha and
19515 0.2.3.8-alpha. Patch from Arlo Breault.
19517 o Removed features:
19518 - Remove migration code from when we renamed the "cached-routers"
19519 file to "cached-descriptors" back in 0.2.0.8-alpha. This
19520 incidentally resolves ticket 6502 by cleaning up the related code
19521 a bit. Patch from Akshay Hebbar.
19523 o Code simplification and refactoring:
19524 - Extract the common duplicated code for creating a subdirectory
19525 of the data directory and writing to a file in it. Fixes ticket
19526 4282; patch from Peter Retzlaff.
19527 - Since OpenSSL 0.9.7, the i2d_*() functions support allocating output
19528 buffer. Avoid calling twice: i2d_RSAPublicKey(), i2d_DHparams(),
19529 i2d_X509(), and i2d_PublicKey(). Resolves ticket 5170.
19530 - Add a set of accessor functions for the circuit timeout data
19531 structure. Fixes ticket 6153; patch from "piet".
19532 - Clean up exit paths from connection_listener_new(). Closes ticket
19533 8789. Patch from Arlo Breault.
19534 - Since we rely on OpenSSL 0.9.8 now, we can use EVP_PKEY_cmp()
19535 and drop our own custom pkey_eq() implementation. Fixes bug 9043.
19536 - Use a doubly-linked list to implement the global circuit list.
19537 Resolves ticket 9108. Patch from Marek Majkowski.
19538 - Remove contrib/id_to_fp.c since it wasn't used anywhere.
19541 Changes in version 0.2.4.17-rc - 2013-09-05
19542 Tor 0.2.4.17-rc is the third release candidate for the Tor 0.2.4.x
19543 series. It adds an emergency step to help us tolerate the massive
19544 influx of users: 0.2.4 clients using the new (faster and safer) "NTor"
19545 circuit-level handshakes now effectively jump the queue compared to
19546 the 0.2.3 clients using "TAP" handshakes. This release also fixes a
19547 big bug hindering bridge reachability tests.
19550 - Relays now process the new "NTor" circuit-level handshake requests
19551 with higher priority than the old "TAP" circuit-level handshake
19552 requests. We still process some TAP requests to not totally starve
19553 0.2.3 clients when NTor becomes popular. A new consensus parameter
19554 "NumNTorsPerTAP" lets us tune the balance later if we need to.
19555 Implements ticket 9574.
19558 - If the circuit build timeout logic is disabled (via the consensus,
19559 or because we are an authority), then don't build testing circuits.
19560 Fixes bug 9657; bugfix on 0.2.2.14-alpha.
19561 - Bridges now send AUTH_CHALLENGE cells during their v3 handshakes;
19562 previously they did not, which prevented them from receiving
19563 successful connections from relays for self-test or bandwidth
19564 testing. Also, when a relay is extending a circuit to a bridge,
19565 it needs to send a NETINFO cell, even when the bridge hasn't sent
19566 an AUTH_CHALLENGE cell. Fixes bug 9546; bugfix on 0.2.3.6-alpha.
19567 - If the time to download the next old-style networkstatus is in
19568 the future, do not decline to consider whether to download the
19569 next microdescriptor networkstatus. Fixes bug 9564; bugfix on
19573 - Avoid double-closing the listener socket in our socketpair()
19574 replacement (used on Windows) in the case where the addresses on
19575 our opened sockets don't match what we expected. Fixes bug 9400;
19576 bugfix on 0.0.2pre7. Found by Coverity.
19578 o Minor fixes (config options):
19579 - Avoid overflows when the user sets MaxCircuitDirtiness to a
19580 ridiculously high value, by imposing a (ridiculously high) 30-day
19581 maximum on MaxCircuitDirtiness.
19582 - Fix the documentation of HeartbeatPeriod to say that the heartbeat
19583 message is logged at notice, not at info.
19584 - Warn and fail if a server is configured not to advertise any
19585 ORPorts at all. (We need *something* to put in our descriptor,
19586 or we just won't work.)
19589 - Track how many "TAP" and "NTor" circuit handshake requests we get,
19590 and how many we complete, and log it every hour to help relay
19591 operators follow trends in network load. Addresses ticket 9658.
19592 - Update to the August 7 2013 Maxmind GeoLite Country database.
19595 Changes in version 0.2.4.16-rc - 2013-08-10
19596 Tor 0.2.4.16-rc is the second release candidate for the Tor 0.2.4.x
19597 series. It fixes several crash bugs in the 0.2.4 branch.
19600 - Fix a bug in the voting algorithm that could yield incorrect results
19601 when a non-naming authority declared too many flags. Fixes bug 9200;
19602 bugfix on 0.2.0.3-alpha.
19603 - Fix an uninitialized read that could in some cases lead to a remote
19604 crash while parsing INTRODUCE2 cells. Bugfix on 0.2.4.1-alpha.
19605 Anybody running a hidden service on the experimental 0.2.4.x
19606 branch should upgrade. (This is, so far as we know, unrelated to
19608 - Avoid an assertion failure when processing DNS replies without the
19609 answer types we expected. Fixes bug 9337; bugfix on 0.2.4.7-alpha.
19610 - Avoid a crash when using --hash-password. Fixes bug 9295; bugfix on
19611 0.2.4.15-rc. Found by stem integration tests.
19614 - Fix an invalid memory read that occurred when a pluggable
19615 transport proxy failed its configuration protocol.
19616 Fixes bug 9288; bugfix on 0.2.4.1-alpha.
19617 - When evaluating whether to use a connection that we haven't
19618 decided is canonical using a recent link protocol version,
19619 decide that it's canonical only if it used address _does_
19620 match the desired address. Fixes bug 9309; bugfix on
19621 0.2.4.4-alpha. Reported by skruffy.
19622 - Make the default behavior of NumDirectoryGuards be to track
19623 NumEntryGuards. Now a user who changes only NumEntryGuards will get
19624 the behavior she expects. Fixes bug 9354; bugfix on 0.2.4.8-alpha.
19625 - Fix a spurious compilation warning with some older versions of
19626 GCC on FreeBSD. Fixes bug 9254; bugfix on 0.2.4.14-alpha.
19629 - Update to the July 3 2013 Maxmind GeoLite Country database.
19632 Changes in version 0.2.4.15-rc - 2013-07-01
19633 Tor 0.2.4.15-rc is the first release candidate for the Tor 0.2.4.x
19634 series. It fixes a few smaller bugs, but generally appears stable.
19635 Please test it and let us know whether it is!
19638 - When receiving a new configuration file via the control port's
19639 LOADCONF command, do not treat the defaults file as absent.
19640 Fixes bug 9122; bugfix on 0.2.3.9-alpha.
19643 - Issue a warning when running with the bufferevents backend enabled.
19644 It's still not stable, and people should know that they're likely
19645 to hit unexpected problems. Closes ticket 9147.
19648 Changes in version 0.2.4.14-alpha - 2013-06-18
19649 Tor 0.2.4.14-alpha fixes a pair of client guard enumeration problems
19650 present in 0.2.4.13-alpha.
19653 - When we have too much memory queued in circuits (according to a new
19654 MaxMemInCellQueues option), close the circuits consuming the most
19655 memory. This prevents us from running out of memory as a relay if
19656 circuits fill up faster than they can be drained. Fixes bug 9063;
19657 bugfix on the 54th commit of Tor. This bug is a further fix beyond
19658 bug 6252, whose fix was merged into 0.2.3.21-rc.
19660 This change also fixes an earlier approach taken in 0.2.4.13-alpha,
19661 where we tried to solve this issue simply by imposing an upper limit
19662 on the number of queued cells for a single circuit. That approach
19663 proved to be problematic, since there are ways to provoke clients to
19664 send a number of cells in excess of any such reasonable limit. Fixes
19665 bug 9072; bugfix on 0.2.4.13-alpha.
19667 - Limit hidden service descriptors to at most ten introduction
19668 points, to slow one kind of guard enumeration. Fixes bug 9002;
19669 bugfix on 0.1.1.11-alpha.
19672 Changes in version 0.2.4.13-alpha - 2013-06-14
19673 Tor 0.2.4.13-alpha fixes a variety of potential remote crash
19674 vulnerabilities, makes socks5 username/password circuit isolation
19675 actually actually work (this time for sure!), and cleans up a bunch
19676 of other issues in preparation for a release candidate.
19678 o Major bugfixes (robustness):
19679 - Close any circuit that has too many cells queued on it. Fixes
19680 bug 9063; bugfix on the 54th commit of Tor. This bug is a further
19681 fix beyond bug 6252, whose fix was merged into 0.2.3.21-rc.
19682 - Prevent the get_freelists() function from running off the end of
19683 the list of freelists if it somehow gets an unrecognized
19684 allocation. Fixes bug 8844; bugfix on 0.2.0.16-alpha. Reported by
19686 - Avoid an assertion failure on OpenBSD (and perhaps other BSDs)
19687 when an exit connection with optimistic data succeeds immediately
19688 rather than returning EINPROGRESS. Fixes bug 9017; bugfix on
19690 - Fix a directory authority crash bug when building a consensus
19691 using an older consensus as its basis. Fixes bug 8833. Bugfix
19695 - Avoid a memory leak where we would leak a consensus body when we
19696 find that a consensus which we couldn't previously verify due to
19697 missing certificates is now verifiable. Fixes bug 8719; bugfix
19699 - We used to always request authority certificates by identity digest,
19700 meaning we'd get the newest one even when we wanted one with a
19701 different signing key. Then we would complain about being given
19702 a certificate we already had, and never get the one we really
19703 wanted. Now we use the "fp-sk/" resource as well as the "fp/"
19704 resource to request the one we want. Fixes bug 5595; bugfix on
19706 - Follow the socks5 protocol when offering username/password
19707 authentication. The fix for bug 8117 exposed this bug, and it
19708 turns out real-world applications like Pidgin do care. Bugfix on
19709 0.2.3.2-alpha; fixes bug 8879.
19710 - Prevent failures on Windows Vista and later when rebuilding the
19711 microdescriptor cache. Diagnosed by Robert Ransom. Fixes bug 8822;
19712 bugfix on 0.2.4.12-alpha.
19715 - Fix an impossible buffer overrun in the AES unit tests. Fixes
19716 bug 8845; bugfix on 0.2.0.7-alpha. Found by eugenis.
19717 - If for some reason we fail to write a microdescriptor while
19718 rebuilding the cache, do not let the annotations from that
19719 microdescriptor linger in the cache file, and do not let the
19720 microdescriptor stay recorded as present in its old location.
19721 Fixes bug 9047; bugfix on 0.2.2.6-alpha.
19722 - Fix a memory leak that would occur whenever a configuration
19723 option changed. Fixes bug 8718; bugfix on 0.2.3.3-alpha.
19724 - Paste the description for PathBias parameters from the man
19725 page into or.h, so the code documents them too. Fixes bug 7982;
19726 bugfix on 0.2.3.17-beta and 0.2.4.8-alpha.
19727 - Relays now treat a changed IPv6 ORPort as sufficient reason to
19728 publish an updated descriptor. Fixes bug 6026; bugfix on
19730 - When launching a resolve request on behalf of an AF_UNIX control
19731 socket, omit the address field of the new entry connection, used in
19732 subsequent controller events, rather than letting tor_dup_addr()
19733 set it to "<unknown address type>". Fixes bug 8639; bugfix on
19736 o Minor bugfixes (log messages):
19737 - Fix a scaling issue in the path bias accounting code that
19738 resulted in "Bug:" log messages from either
19739 pathbias_scale_close_rates() or pathbias_count_build_success().
19740 This represents a bugfix on a previous bugfix: the original fix
19741 attempted in 0.2.4.10-alpha was incomplete. Fixes bug 8235; bugfix
19743 - Give a less useless error message when the user asks for an IPv4
19744 address on an IPv6-only port, or vice versa. Fixes bug 8846; bugfix
19748 - Downgrade "unexpected SENDME" warnings to protocol-warn for 0.2.4.x,
19749 to tolerate bug 8093 for now.
19750 - Add an "ignoring-advertised-bws" boolean to the flag-threshold lines
19751 in directory authority votes to describe whether they have enough
19752 measured bandwidths to ignore advertised (relay descriptor)
19753 bandwidth claims. Resolves ticket 8711.
19754 - Update to the June 5 2013 Maxmind GeoLite Country database.
19756 o Removed documentation:
19757 - Remove some of the older contents of doc/ as obsolete; move others
19758 to torspec.git. Fixes bug 8965.
19760 o Code simplification and refactoring:
19761 - Avoid using character buffers when constructing most directory
19762 objects: this approach was unwieldy and error-prone. Instead,
19763 build smartlists of strings, and concatenate them when done.
19766 Changes in version 0.2.4.12-alpha - 2013-04-18
19767 Tor 0.2.4.12-alpha moves Tor forward on several fronts: it starts the
19768 process for lengthening the guard rotation period, makes directory
19769 authority opinions in the consensus a bit less gameable, makes socks5
19770 username/password circuit isolation actually work, and fixes a wide
19771 variety of other issues.
19774 - Raise the default time that a client keeps an entry guard from
19775 "1-2 months" to "2-3 months", as suggested by Tariq Elahi's WPES
19776 2012 paper. (We would make it even longer, but we need better client
19777 load balancing first.) Also, make the guard lifetime controllable
19778 via a new GuardLifetime torrc option and a GuardLifetime consensus
19779 parameter. Start of a fix for bug 8240; bugfix on 0.1.1.11-alpha.
19780 - Directory authorities now prefer using measured bandwidths to
19781 advertised ones when computing flags and thresholds. Resolves
19783 - Directory authorities that have more than a threshold number
19784 of relays with measured bandwidths now treat relays with unmeasured
19785 bandwidths as having bandwidth 0. Resolves ticket 8435.
19787 o Major bugfixes (assert / resource use):
19788 - Avoid a bug where our response to TLS renegotiation under certain
19789 network conditions could lead to a busy-loop, with 100% CPU
19790 consumption. Fixes bug 5650; bugfix on 0.2.0.16-alpha.
19791 - Avoid an assertion when we discover that we'd like to write a cell
19792 onto a closing connection: just discard the cell. Fixes another
19793 case of bug 7350; bugfix on 0.2.4.4-alpha.
19795 o Major bugfixes (client-side privacy):
19796 - When we mark a circuit as unusable for new circuits, have it
19797 continue to be unusable for new circuits even if MaxCircuitDirtiness
19798 is increased too much at the wrong time, or the system clock jumps
19799 backwards. Fixes bug 6174; bugfix on 0.0.2pre26.
19800 - If ClientDNSRejectInternalAddresses ("do not believe DNS queries
19801 which have resolved to internal addresses") is set, apply that
19802 rule to IPv6 as well. Fixes bug 8475; bugfix on 0.2.0.7-alpha.
19803 - When an exit relay rejects a stream with reason "exit policy", but
19804 we only know an exit policy summary (e.g. from the microdesc
19805 consensus) for it, do not mark the relay as useless for all exiting.
19806 Instead, mark just the circuit as unsuitable for that particular
19807 address. Fixes part of bug 7582; bugfix on 0.2.3.2-alpha.
19808 - Allow applications to get proper stream isolation with
19809 IsolateSOCKSAuth. Many SOCKS5 clients that want to offer
19810 username/password authentication also offer "no authentication". Tor
19811 had previously preferred "no authentication", so the applications
19812 never actually sent Tor their auth details. Now Tor selects
19813 username/password authentication if it's offered. You can disable
19814 this behavior on a per-SOCKSPort basis via PreferSOCKSNoAuth. Fixes
19815 bug 8117; bugfix on 0.2.3.3-alpha.
19817 o Major bugfixes (other):
19818 - When unable to find any working directory nodes to use as a
19819 directory guard, give up rather than adding the same non-working
19820 nodes to the directory guard list over and over. Fixes bug 8231;
19821 bugfix on 0.2.4.8-alpha.
19824 - Reject as invalid most directory objects containing a NUL.
19825 Belt-and-suspender fix for bug 8037.
19826 - In our testsuite, create temporary directories with a bit more
19827 entropy in their name to make name collisions less likely. Fixes
19829 - Add CACHED keyword to ADDRMAP events in the control protocol
19830 to indicate whether a DNS result will be cached or not. Resolves
19832 - Update to the April 3 2013 Maxmind GeoLite Country database.
19834 o Minor features (build):
19835 - Detect and reject attempts to build Tor with threading support
19836 when OpenSSL has been compiled without threading support.
19838 - Clarify that when autoconf is checking for nacl, it is checking
19839 specifically for nacl with a fast curve25519 implementation.
19841 - Warn if building on a platform with an unsigned time_t: there
19842 are too many places where Tor currently assumes that time_t can
19843 hold negative values. We'd like to fix them all, but probably
19846 o Minor bugfixes (build):
19847 - Fix some bugs in tor-fw-helper-natpmp when trying to build and
19848 run it on Windows. More bugs likely remain. Patch from Gisle Vanem.
19849 Fixes bug 7280; bugfix on 0.2.3.1-alpha.
19850 - Add the old src/or/micro-revision.i filename to CLEANFILES.
19851 On the off chance that somebody has one, it will go away as soon
19852 as they run "make clean". Fix for bug 7143; bugfix on 0.2.4.1-alpha.
19853 - Build Tor correctly on 32-bit platforms where the compiler can build
19854 but not run code using the "uint128_t" construction. Fixes bug 8587;
19855 bugfix on 0.2.4.8-alpha.
19856 - Fix compilation warning with some versions of clang that would
19857 prefer the -Wswitch-enum compiler flag to warn about switch
19858 statements with missing enum values, even if those switch
19859 statements have a "default:" statement. Fixes bug 8598; bugfix
19862 o Minor bugfixes (protocol):
19863 - Fix the handling of a TRUNCATE cell when it arrives while the
19864 circuit extension is in progress. Fixes bug 7947; bugfix on 0.0.7.1.
19865 - Fix a misframing issue when reading the version numbers in a
19866 VERSIONS cell. Previously we would recognize [00 01 00 02] as
19867 'version 1, version 2, and version 0x100', when it should have
19868 only included versions 1 and 2. Fixes bug 8059; bugfix on
19869 0.2.0.10-alpha. Reported pseudonymously.
19870 - Make the format and order of STREAM events for DNS lookups
19871 consistent among the various ways to launch DNS lookups. Fixes
19872 bug 8203; bugfix on 0.2.0.24-rc. Patch by "Desoxy".
19873 - Correct our check for which versions of Tor support the EXTEND2
19874 cell. We had been willing to send it to Tor 0.2.4.7-alpha and
19875 later, when support was really added in version 0.2.4.8-alpha.
19876 Fixes bug 8464; bugfix on 0.2.4.8-alpha.
19878 o Minor bugfixes (other):
19879 - Correctly store microdescriptors and extrainfo descriptors with
19880 an internal NUL byte. Fixes bug 8037; bugfix on 0.2.0.1-alpha.
19881 Bug reported by "cypherpunks".
19882 - Increase the width of the field used to remember a connection's
19883 link protocol version to two bytes. Harmless for now, since the
19884 only currently recognized versions are one byte long. Reported
19885 pseudonymously. Fixes bug 8062; bugfix on 0.2.0.10-alpha.
19886 - If the state file's path bias counts are invalid (presumably from a
19887 buggy Tor prior to 0.2.4.10-alpha), make them correct. Also add
19888 additional checks and log messages to the scaling of Path Bias
19889 counts, in case there still are remaining issues with scaling.
19890 Should help resolve bug 8235.
19891 - Eliminate several instances where we use "Nickname=ID" to refer to
19892 nodes in logs. Use "Nickname (ID)" instead. (Elsewhere, we still use
19893 "$ID=Nickname", which is also acceptable.) Fixes bug 7065. Bugfix
19894 on 0.2.3.21-rc, 0.2.4.5-alpha, 0.2.4.8-alpha, and 0.2.4.10-alpha.
19896 o Minor bugfixes (syscalls):
19897 - Always check the return values of functions fcntl() and
19898 setsockopt(). We don't believe these are ever actually failing in
19899 practice, but better safe than sorry. Also, checking these return
19900 values should please analysis tools like Coverity. Patch from
19901 'flupzor'. Fixes bug 8206; bugfix on all versions of Tor.
19902 - Use direct writes rather than stdio when building microdescriptor
19903 caches, in an attempt to mitigate bug 8031, or at least make it
19906 o Minor bugfixes (config):
19907 - When rejecting a configuration because we were unable to parse a
19908 quoted string, log an actual error message. Fixes bug 7950; bugfix
19910 - Behave correctly when the user disables LearnCircuitBuildTimeout
19911 but doesn't tell us what they would like the timeout to be. Fixes
19912 bug 6304; bugfix on 0.2.2.14-alpha.
19913 - When autodetecting the number of CPUs, use the number of available
19914 CPUs in preference to the number of configured CPUs. Inform the
19915 user if this reduces the number of available CPUs. Fixes bug 8002;
19916 bugfix on 0.2.3.1-alpha.
19917 - Make it an error when you set EntryNodes but disable UseGuardNodes,
19918 since it will (surprisingly to some users) ignore EntryNodes. Fixes
19919 bug 8180; bugfix on 0.2.3.11-alpha.
19920 - Allow TestingTorNetworks to override the 4096-byte minimum for
19921 the Fast threshold. Otherwise they can't bootstrap until they've
19922 observed more traffic. Fixes bug 8508; bugfix on 0.2.4.10-alpha.
19923 - Fix some logic errors when the user manually overrides the
19924 PathsNeededToBuildCircuits option in torrc. Fixes bug 8599; bugfix
19927 o Minor bugfixes (log messages to help diagnose bugs):
19928 - If we fail to free a microdescriptor because of bug 7164, log
19929 the filename and line number from which we tried to free it.
19930 - Add another diagnostic to the heartbeat message: track and log
19931 overhead that TLS is adding to the data we write. If this is
19932 high, we are sending too little data to SSL_write at a time.
19933 Diagnostic for bug 7707.
19934 - Add more detail to a log message about relaxed timeouts, to help
19936 - Warn more aggressively when flushing microdescriptors to a
19937 microdescriptor cache fails, in an attempt to mitigate bug 8031,
19938 or at least make it more diagnosable.
19939 - Improve debugging output to help track down bug 8185 ("Bug:
19940 outgoing relay cell has n_chan==NULL. Dropping.")
19941 - Log the purpose of a path-bias testing circuit correctly.
19942 Improves a log message from bug 8477; bugfix on 0.2.4.8-alpha.
19944 o Minor bugfixes (0.2.4.x log messages that were too noisy):
19945 - Don't attempt to relax the timeout of already opened 1-hop circuits.
19946 They might never timeout. This should eliminate some/all cases of
19947 the relaxed timeout log message.
19948 - Use circuit creation time for network liveness evaluation. This
19949 should eliminate warning log messages about liveness caused
19950 by changes in timeout evaluation. Fixes bug 6572; bugfix on
19952 - Reduce a path bias length check from notice to info. The message
19953 is triggered when creating controller circuits. Fixes bug 8196;
19954 bugfix on 0.2.4.8-alpha.
19955 - Fix a path state issue that triggered a notice during relay startup.
19956 Fixes bug 8320; bugfix on 0.2.4.10-alpha.
19957 - Reduce occurrences of warns about circuit purpose in
19958 connection_ap_expire_building(). Fixes bug 8477; bugfix on
19961 o Minor bugfixes (pre-0.2.4.x log messages that were too noisy):
19962 - If we encounter a write failure on a SOCKS connection before we
19963 finish our SOCKS handshake, don't warn that we closed the
19964 connection before we could send a SOCKS reply. Fixes bug 8427;
19965 bugfix on 0.1.0.1-rc.
19966 - Correctly recognize that [::1] is a loopback address. Fixes
19967 bug 8377; bugfix on 0.2.1.3-alpha.
19968 - Fix a directory authority warn caused when we have a large amount
19969 of badexit bandwidth. Fixes bug 8419; bugfix on 0.2.2.10-alpha.
19970 - Don't log inappropriate heartbeat messages when hibernating: a
19971 hibernating node is _expected_ to drop out of the consensus,
19972 decide it isn't bootstrapped, and so forth. Fixes bug 7302;
19973 bugfix on 0.2.3.1-alpha.
19974 - Don't complain about bootstrapping problems while hibernating.
19975 These complaints reflect a general code problem, but not one
19976 with any problematic effects (no connections are actually
19977 opened). Fixes part of bug 7302; bugfix on 0.2.3.2-alpha.
19979 o Documentation fixes:
19980 - Update tor-fw-helper.1.txt and tor-fw-helper.c to make option
19981 names match. Fixes bug 7768.
19982 - Make the torify manpage no longer refer to tsocks; torify hasn't
19983 supported tsocks since 0.2.3.14-alpha.
19984 - Make the tor manpage no longer reference tsocks.
19985 - Fix the GeoIPExcludeUnknown documentation to refer to
19986 ExcludeExitNodes rather than the currently nonexistent
19987 ExcludeEntryNodes. Spotted by "hamahangi" on tor-talk.
19990 - The tor-tsocks.conf is no longer distributed or installed. We
19991 recommend that tsocks users use torsocks instead. Resolves
19995 Changes in version 0.2.4.11-alpha - 2013-03-11
19996 Tor 0.2.4.11-alpha makes relay measurement by directory authorities
19997 more robust, makes hidden service authentication work again, and
19998 resolves a DPI fingerprint for Tor's SSL transport.
20000 o Major features (directory authorities):
20001 - Directory authorities now support a new consensus method (17)
20002 where they cap the published bandwidth of servers for which
20003 insufficient bandwidth measurements exist. Fixes part of bug 2286.
20004 - Directory authorities that set "DisableV2DirectoryInfo_ 1" no longer
20005 serve any v2 directory information. Now we can test disabling the
20006 old deprecated v2 directory format, and see whether doing so has
20007 any effect on network load. Begins to fix bug 6783.
20008 - Directory authorities now include inside each vote a statement of
20009 the performance thresholds they used when assigning flags.
20010 Implements ticket 8151.
20012 o Major bugfixes (directory authorities):
20013 - Stop marking every relay as having been down for one hour every
20014 time we restart a directory authority. These artificial downtimes
20015 were messing with our Stable and Guard flag calculations. Fixes
20016 bug 8218 (introduced by the fix for 1035). Bugfix on 0.2.2.23-alpha.
20018 o Major bugfixes (hidden services):
20019 - Allow hidden service authentication to succeed again. When we
20020 refactored the hidden service introduction code back
20021 in 0.2.4.1-alpha, we didn't update the code that checks
20022 whether authentication information is present, causing all
20023 authentication checks to return "false". Fix for bug 8207; bugfix
20024 on 0.2.4.1-alpha. Found by Coverity; this is CID 718615.
20026 o Minor features (relays, bridges):
20027 - Make bridge relays check once a minute for whether their IP
20028 address has changed, rather than only every 15 minutes. Resolves
20029 bugs 1913 and 1992.
20030 - Refactor resolve_my_address() so it returns the method by which we
20031 decided our public IP address (explicitly configured, resolved from
20032 explicit hostname, guessed from interfaces, learned by gethostname).
20033 Now we can provide more helpful log messages when a relay guesses
20034 its IP address incorrectly (e.g. due to unexpected lines in
20035 /etc/hosts). Resolves ticket 2267.
20036 - Teach bridge-using clients to avoid 0.2.2 bridges when making
20037 microdescriptor-related dir requests, and only fall back to normal
20038 descriptors if none of their bridges can handle microdescriptors
20039 (as opposed to the fix in ticket 4013, which caused them to fall
20040 back to normal descriptors if *any* of their bridges preferred
20041 them). Resolves ticket 4994.
20042 - Randomize the lifetime of our SSL link certificate, so censors can't
20043 use the static value for filtering Tor flows. Resolves ticket 8443;
20044 related to ticket 4014 which was included in 0.2.2.33.
20045 - Support a new version of the link protocol that allows 4-byte circuit
20046 IDs. Previously, circuit IDs were limited to 2 bytes, which presented
20047 a possible resource exhaustion issue. Closes ticket 7351; implements
20050 o Minor features (portability):
20051 - Tweak the curve25519-donna*.c implementations to tolerate systems
20052 that lack stdint.h. Fixes bug 3894; bugfix on 0.2.4.8-alpha.
20053 - Use Ville Laurikari's implementation of AX_CHECK_SIGN() to determine
20054 the signs of types during autoconf. This is better than our old
20055 approach, which didn't work when cross-compiling.
20056 - Detect the sign of enum values, rather than assuming that MSC is the
20057 only compiler where enum types are all signed. Fixes bug 7727;
20058 bugfix on 0.2.4.10-alpha.
20060 o Minor features (other):
20061 - Say "KBytes" rather than "KB" in the man page (for various values
20062 of K), to further reduce confusion about whether Tor counts in
20063 units of memory or fractions of units of memory. Resolves ticket 7054.
20064 - Clear the high bit on curve25519 public keys before passing them to
20065 our backend, in case we ever wind up using a backend that doesn't do
20066 so itself. If we used such a backend, and *didn't* clear the high bit,
20067 we could wind up in a situation where users with such backends would
20068 be distinguishable from users without. Fixes bug 8121; bugfix on
20070 - Update to the March 6 2013 Maxmind GeoLite Country database.
20072 o Minor bugfixes (clients):
20073 - When we receive a RELAY_END cell with the reason DONE, or with no
20074 reason, before receiving a RELAY_CONNECTED cell, report the SOCKS
20075 status as "connection refused". Previously we reported these cases
20076 as success but then immediately closed the connection. Fixes bug
20077 7902; bugfix on 0.1.0.1-rc. Reported by "oftc_must_be_destroyed".
20078 - Downgrade an assertion in connection_ap_expire_beginning to an
20079 LD_BUG message. The fix for bug 8024 should prevent this message
20080 from displaying, but just in case, a warn that we can diagnose
20081 is better than more assert crashes. Fixes bug 8065; bugfix on
20083 - Lower path use bias thresholds to .80 for notice and .60 for warn.
20084 Also make the rate limiting flags for the path use bias log messages
20085 independent from the original path bias flags. Fixes bug 8161;
20086 bugfix on 0.2.4.10-alpha.
20088 o Minor bugfixes (relays):
20089 - Stop trying to resolve our hostname so often (e.g. every time we
20090 think about doing a directory fetch). Now we reuse the cached
20091 answer in some cases. Fixes bugs 1992 (bugfix on 0.2.0.20-rc)
20092 and 2410 (bugfix on 0.1.2.2-alpha).
20093 - Stop sending a stray "(null)" in some cases for the server status
20094 "EXTERNAL_ADDRESS" controller event. Resolves bug 8200; bugfix
20096 - When choosing which stream on a formerly stalled circuit to wake
20097 first, make better use of the platform's weak RNG. Previously,
20098 we had been using the % ("modulo") operator to try to generate a
20099 1/N chance of picking each stream, but this behaves badly with
20100 many platforms' choice of weak RNG. Fixes bug 7801; bugfix on
20102 - Use our own weak RNG when we need a weak RNG. Windows's rand() and
20103 Irix's random() only return 15 bits; Solaris's random() returns more
20104 bits but its RAND_MAX says it only returns 15, and so on. Motivated
20105 by the fix for bug 7801; bugfix on 0.2.2.20-alpha.
20107 o Minor bugfixes (directory authorities):
20108 - Directory authorities now use less space when formatting identical
20109 microdescriptor lines in directory votes. Fixes bug 8158; bugfix
20112 o Minor bugfixes (memory leaks spotted by Coverity -- bug 7816):
20113 - Avoid leaking memory if we fail to compute a consensus signature
20114 or we generate a consensus we can't parse. Bugfix on 0.2.0.5-alpha.
20115 - Fix a memory leak when receiving headers from an HTTPS proxy. Bugfix
20117 - Fix a memory leak during safe-cookie controller authentication.
20118 Bugfix on 0.2.3.13-alpha.
20119 - Avoid memory leak of IPv6 policy content if we fail to format it into
20120 a router descriptor. Bugfix on 0.2.4.7-alpha.
20122 o Minor bugfixes (other code correctness issues):
20123 - Avoid a crash if we fail to generate an extrainfo descriptor.
20124 Fixes bug 8208; bugfix on 0.2.3.16-alpha. Found by Coverity;
20125 this is CID 718634.
20126 - When detecting the largest possible file descriptor (in order to
20127 close all file descriptors when launching a new program), actually
20128 use _SC_OPEN_MAX. The old code for doing this was very, very broken.
20129 Fixes bug 8209; bugfix on 0.2.3.1-alpha. Found by Coverity; this
20131 - Fix a copy-and-paste error when adding a missing A1 to a routerset
20132 because of GeoIPExcludeUnknown. Fix for Coverity CID 980650.
20133 Bugfix on 0.2.4.10-alpha.
20134 - Fix an impossible-to-trigger integer overflow when estimating how
20135 long our onionskin queue would take. (This overflow would require us
20136 to accept 4 million onionskins before processing 100 of them.) Fixes
20137 bug 8210; bugfix on 0.2.4.10-alpha.
20139 o Code simplification and refactoring:
20140 - Add a wrapper function for the common "log a message with a
20144 Changes in version 0.2.4.10-alpha - 2013-02-04
20145 Tor 0.2.4.10-alpha adds defenses at the directory authority level from
20146 certain attacks that flood the network with relays; changes the queue
20147 for circuit create requests from a sized-based limit to a time-based
20148 limit; resumes building with MSVC on Windows; and fixes a wide variety
20151 o Major bugfixes (directory authority):
20152 - When computing directory thresholds, ignore any rejected-as-sybil
20153 nodes during the computation so that they can't influence Fast,
20154 Guard, etc. (We should have done this for proposal 109.) Fixes
20156 - When marking a node as a likely sybil, reset its uptime metrics
20157 to zero, so that it cannot time towards getting marked as Guard,
20158 Stable, or HSDir. (We should have done this for proposal 109.) Fixes
20162 - When a TLS write is partially successful but incomplete, remember
20163 that the flushed part has been flushed, and notice that bytes were
20164 actually written. Reported and fixed pseudonymously. Fixes bug
20165 7708; bugfix on Tor 0.1.0.5-rc.
20166 - Reject bogus create and relay cells with 0 circuit ID or 0 stream
20167 ID: these could be used to create unexpected streams and circuits
20168 which would count as "present" to some parts of Tor but "absent"
20169 to others, leading to zombie circuits and streams or to a bandwidth
20170 denial-of-service. Fixes bug 7889; bugfix on every released version
20171 of Tor. Reported by "oftc_must_be_destroyed".
20172 - Rename all macros in our local copy of queue.h to begin with "TOR_".
20173 This change seems the only good way to permanently prevent conflicts
20174 with queue.h on various operating systems. Fixes bug 8107; bugfix
20177 o Major features (relay):
20178 - Instead of limiting the number of queued onionskins (aka circuit
20179 create requests) to a fixed, hard-to-configure number, we limit
20180 the size of the queue based on how many we expect to be able to
20181 process in a given amount of time. We estimate the time it will
20182 take to process an onionskin based on average processing time
20183 of previous onionskins. Closes ticket 7291. You'll never have to
20184 configure MaxOnionsPending again.
20186 o Major features (portability):
20187 - Resume building correctly with MSVC and Makefile.nmake. This patch
20188 resolves numerous bugs and fixes reported by ultramage, including
20189 7305, 7308, 7309, 7310, 7312, 7313, 7315, 7316, and 7669.
20190 - Make the ntor and curve25519 code build correctly with MSVC.
20191 Fix on 0.2.4.8-alpha.
20194 - When directory authorities are computing thresholds for flags,
20195 never let the threshold for the Fast flag fall below 4096
20196 bytes. Also, do not consider nodes with extremely low bandwidths
20197 when deciding thresholds for various directory flags. This change
20198 should raise our threshold for Fast relays, possibly in turn
20199 improving overall network performance; see ticket 1854. Resolves
20201 - The Tor client now ignores sub-domain components of a .onion
20202 address. This change makes HTTP "virtual" hosting
20203 possible: http://foo.aaaaaaaaaaaaaaaa.onion/ and
20204 http://bar.aaaaaaaaaaaaaaaa.onion/ can be two different websites
20205 hosted on the same hidden service. Implements proposal 204.
20206 - We compute the overhead from passing onionskins back and forth to
20207 cpuworkers, and report it when dumping statistics in response to
20208 SIGUSR1. Supports ticket 7291.
20210 o Minor features (path selection):
20211 - When deciding whether we have enough descriptors to build circuits,
20212 instead of looking at raw relay counts, look at which fraction
20213 of (bandwidth-weighted) paths we're able to build. This approach
20214 keeps clients from building circuits if their paths are likely to
20215 stand out statistically. The default fraction of paths needed is
20216 taken from the consensus directory; you can override it with the
20217 new PathsNeededToBuildCircuits option. Fixes ticket 5956.
20218 - When any country code is listed in ExcludeNodes or ExcludeExitNodes,
20219 and we have GeoIP information, also exclude all nodes with unknown
20220 countries "??" and "A1". This behavior is controlled by the
20221 new GeoIPExcludeUnknown option: you can make such nodes always
20222 excluded with "GeoIPExcludeUnknown 1", and disable the feature
20223 with "GeoIPExcludeUnknown 0". Setting "GeoIPExcludeUnknown auto"
20224 gets you the default behavior. Implements feature 7706.
20225 - Path Use Bias: Perform separate accounting for successful circuit
20226 use. Keep separate statistics on stream attempt rates versus stream
20227 success rates for each guard. Provide configurable thresholds to
20228 determine when to emit log messages or disable use of guards that
20229 fail too many stream attempts. Resolves ticket 7802.
20231 o Minor features (log messages):
20232 - When learning a fingerprint for a bridge, log its corresponding
20233 transport type. Implements ticket 7896.
20234 - Improve the log message when "Bug/attack: unexpected sendme cell
20235 from client" occurs, to help us track bug 8093.
20238 - Remove a couple of extraneous semicolons that were upsetting the
20239 cparser library. Patch by Christian Grothoff. Fixes bug 7115;
20240 bugfix on 0.2.2.1-alpha.
20241 - Remove a source of rounding error during path bias count scaling;
20242 don't count cannibalized circuits as used for path bias until we
20243 actually try to use them; and fix a circuit_package_relay_cell()
20244 warning message about n_chan==NULL. Fixes bug 7802.
20245 - Detect nacl when its headers are in a nacl/ subdirectory. Also,
20246 actually link against nacl when we're configured to use it. Fixes
20247 bug 7972; bugfix on 0.2.4.8-alpha.
20248 - Compile correctly with the --disable-curve25519 option. Fixes
20249 bug 8153; bugfix on 0.2.4.8-alpha.
20251 o Build improvements:
20252 - Do not report status verbosely from autogen.sh unless the -v flag
20253 is specified. Fixes issue 4664. Patch from Onizuka.
20254 - Replace all calls to snprintf() outside of src/ext with
20255 tor_snprintf(). Also remove the #define to replace snprintf with
20256 _snprintf on Windows; they have different semantics, and all of
20257 our callers should be using tor_snprintf() anyway. Fixes bug 7304.
20258 - Try to detect if we are ever building on a platform where
20259 memset(...,0,...) does not set the value of a double to 0.0. Such
20260 platforms are permitted by the C standard, though in practice
20261 they're pretty rare (since IEEE 754 is nigh-ubiquitous). We don't
20262 currently support them, but it's better to detect them and fail
20263 than to perform erroneously.
20265 o Removed features:
20266 - Stop exporting estimates of v2 and v3 directory traffic shares
20267 in extrainfo documents. They were unneeded and sometimes inaccurate.
20268 Also stop exporting any v2 directory request statistics. Resolves
20270 - Drop support for detecting and warning about versions of Libevent
20271 before 1.3e. Nothing reasonable ships with them any longer;
20272 warning the user about them shouldn't be needed. Resolves ticket
20275 o Code simplifications and refactoring:
20276 - Rename "isin" functions to "contains", for grammar. Resolves
20278 - Rename Tor's logging function log() to tor_log(), to avoid conflicts
20279 with the natural logarithm function from the system libm. Resolves
20283 Changes in version 0.2.4.9-alpha - 2013-01-15
20284 Tor 0.2.4.9-alpha provides a quick fix to make the new ntor handshake
20285 work more robustly.
20288 - Fix backward compatibility logic when receiving an embedded ntor
20289 handshake tunneled in a CREATE cell. This clears up the "Bug:
20290 couldn't format CREATED cell" warning. Fixes bug 7959; bugfix
20294 Changes in version 0.2.4.8-alpha - 2013-01-14
20295 Tor 0.2.4.8-alpha introduces directory guards to reduce user enumeration
20296 risks, adds a new stronger and faster circuit handshake, and offers
20297 stronger and faster link encryption when both sides support it.
20300 - Preliminary support for directory guards (proposal 207): when
20301 possible, clients now use their entry guards for non-anonymous
20302 directory requests. This can help prevent client enumeration. Note
20303 that this behavior only works when we have a usable consensus
20304 directory, and when options about what to download are more or less
20305 standard. In the future we should re-bootstrap from our guards,
20306 rather than re-bootstrapping from the preconfigured list of
20307 directory sources that ships with Tor. Resolves ticket 6526.
20308 - Tor relays and clients now support a better CREATE/EXTEND cell
20309 format, allowing the sender to specify multiple address, identity,
20310 and handshake types. Implements Robert Ransom's proposal 200;
20311 closes ticket 7199.
20313 o Major features (new circuit handshake):
20314 - Tor now supports a new circuit extension handshake designed by Ian
20315 Goldberg, Douglas Stebila, and Berkant Ustaoglu. Our original
20316 circuit extension handshake, later called "TAP", was a bit slow
20317 (especially on the relay side), had a fragile security proof, and
20318 used weaker keys than we'd now prefer. The new circuit handshake
20319 uses Dan Bernstein's "curve25519" elliptic-curve Diffie-Hellman
20320 function, making it significantly more secure than the older
20321 handshake, and significantly faster. Tor can use one of two built-in
20322 pure-C curve25519-donna implementations by Adam Langley, or it
20323 can link against the "nacl" library for a tuned version if present.
20325 The built-in version is very fast for 64-bit systems when building
20326 with GCC. The built-in 32-bit version is still faster than the
20327 old TAP protocol, but using libnacl is better on most such hosts.
20329 Clients don't currently use this protocol by default, since
20330 comparatively few clients support it so far. To try it, set
20331 UseNTorHandshake to 1.
20333 Implements proposal 216; closes ticket 7202.
20335 o Major features (better link encryption):
20336 - Relays can now enable the ECDHE TLS ciphersuites when available
20337 and appropriate. These ciphersuites let us negotiate forward-secure
20338 TLS secret keys more safely and more efficiently than with our
20339 previous use of Diffie-Hellman modulo a 1024-bit prime. By default,
20340 public relays prefer the (faster) P224 group, and bridges prefer
20341 the (more common) P256 group; you can override this with the
20344 Enabling these ciphers was a little tricky, since for a long time,
20345 clients had been claiming to support them without actually doing
20346 so, in order to foil fingerprinting. But with the client-side
20347 implementation of proposal 198 in 0.2.3.17-beta, clients can now
20348 match the ciphers from recent Firefox versions *and* list the
20349 ciphers they actually mean, so relays can believe such clients
20350 when they advertise ECDHE support in their TLS ClientHello messages.
20352 This feature requires clients running 0.2.3.17-beta or later,
20353 and requires both sides to be running OpenSSL 1.0.0 or later
20354 with ECC support. OpenSSL 1.0.1, with the compile-time option
20355 "enable-ec_nistp_64_gcc_128", is highly recommended.
20357 Implements the relay side of proposal 198; closes ticket 7200.
20360 - Avoid crashing when, as a relay without IPv6-exit support, a
20361 client insists on getting an IPv6 address or nothing. Fixes bug
20362 7814; bugfix on 0.2.4.7-alpha.
20365 - Improve circuit build timeout handling for hidden services.
20366 In particular: adjust build timeouts more accurately depending
20367 upon the number of hop-RTTs that a particular circuit type
20368 undergoes. Additionally, launch intro circuits in parallel
20369 if they timeout, and take the first one to reply as valid.
20370 - Work correctly on Unix systems where EAGAIN and EWOULDBLOCK are
20371 separate error codes; or at least, don't break for that reason.
20372 Fixes bug 7935. Reported by "oftc_must_be_destroyed".
20373 - Update to the January 2 2013 Maxmind GeoLite Country database.
20375 o Minor features (testing):
20376 - Add benchmarks for DH (1024-bit multiplicative group) and ECDH
20377 (P-256) Diffie-Hellman handshakes to src/or/bench.
20378 - Add benchmark functions to test onion handshake performance.
20380 o Minor features (path bias detection):
20381 - Alter the Path Bias log messages to be more descriptive in terms
20382 of reporting timeouts and other statistics.
20383 - Create three levels of Path Bias log messages, as opposed to just
20384 two. These are configurable via consensus as well as via the torrc
20385 options PathBiasNoticeRate, PathBiasWarnRate, PathBiasExtremeRate.
20386 The default values are 0.70, 0.50, and 0.30 respectively.
20387 - Separate the log message levels from the decision to drop guards,
20388 which also is available via torrc option PathBiasDropGuards.
20389 PathBiasDropGuards still defaults to 0 (off).
20390 - Deprecate PathBiasDisableRate in favor of PathBiasDropGuards
20391 in combination with PathBiasExtremeRate.
20392 - Increase the default values for PathBiasScaleThreshold and
20393 PathBiasCircThreshold from (200, 20) to (300, 150).
20394 - Add in circuit usage accounting to path bias. If we try to use a
20395 built circuit but fail for any reason, it counts as path bias.
20396 Certain classes of circuits where the adversary gets to pick your
20397 destination node are exempt from this accounting. Usage accounting
20398 can be specifically disabled via consensus parameter or torrc.
20399 - Convert all internal path bias state to double-precision floating
20400 point, to avoid roundoff error and other issues.
20401 - Only record path bias information for circuits that have completed
20402 *two* hops. Assuming end-to-end tagging is the attack vector, this
20403 makes us more resilient to ambient circuit failure without any
20404 detection capability loss.
20406 o Minor bugfixes (log messages):
20407 - Rate-limit the "No circuits are opened. Relaxed timeout for a
20408 circuit with channel state open..." message to once per hour to
20409 keep it from filling the notice logs. Mitigates bug 7799 but does
20410 not fix the underlying cause. Bugfix on 0.2.4.7-alpha.
20411 - Avoid spurious warnings when configuring multiple client ports of
20412 which only some are nonlocal. Previously, we had claimed that some
20413 were nonlocal when in fact they weren't. Fixes bug 7836; bugfix on
20416 o Code simplifications and refactoring:
20417 - Get rid of a couple of harmless clang warnings, where we compared
20418 enums to ints. These warnings are newly introduced in clang 3.2.
20419 - Split the onion.c file into separate modules for the onion queue
20420 and the different handshakes it supports.
20421 - Remove the marshalling/unmarshalling code for sending requests to
20422 cpuworkers over a socket, and instead just send structs. The
20423 recipient will always be the same Tor binary as the sender, so
20424 any encoding is overkill.
20427 Changes in version 0.2.4.7-alpha - 2012-12-24
20428 Tor 0.2.4.7-alpha introduces a new approach to providing fallback
20429 directory mirrors for more robust bootstrapping; fixes more issues where
20430 clients with changing network conditions refuse to make any circuits;
20431 adds initial support for exiting to IPv6 addresses; resumes being able
20432 to update our GeoIP database, and includes the geoip6 file this time;
20433 turns off the client-side DNS cache by default due to privacy risks;
20434 and fixes a variety of other issues.
20436 o Major features (client resilience):
20437 - Add a new "FallbackDir" torrc option to use when we can't use
20438 a directory mirror from the consensus (either because we lack a
20439 consensus, or because they're all down). Currently, all authorities
20440 are fallbacks by default, and there are no other default fallbacks,
20441 but that will change. This option will allow us to give clients a
20442 longer list of servers to try to get a consensus from when first
20443 connecting to the Tor network, and thereby reduce load on the
20444 directory authorities. Implements proposal 206, "Preconfigured
20445 directory sources for bootstrapping". We also removed the old
20446 "FallbackNetworkstatus" option, since we never got it working well
20447 enough to use it. Closes bug 572.
20448 - If we have no circuits open, use a relaxed timeout (the
20449 95-percentile cutoff) until a circuit succeeds. This heuristic
20450 should allow Tor to succeed at building circuits even when the
20451 network connection drastically changes. Should help with bug 3443.
20453 o Major features (IPv6):
20454 - Relays can now exit to IPv6 addresses: make sure that you have IPv6
20455 connectivity, then set the IPv6Exit flag to 1. Also make sure your
20456 exit policy reads as you would like: the address * applies to all
20457 address families, whereas *4 is IPv4 address only, and *6 is IPv6
20458 addresses only. On the client side, you'll need to wait until the
20459 authorities have upgraded, wait for enough exits to support IPv6,
20460 apply the "IPv6Traffic" flag to a SocksPort, and use Socks5. Closes
20461 ticket 5547, implements proposal 117 as revised in proposal 208.
20463 We DO NOT recommend that clients with actual anonymity needs start
20464 using IPv6 over Tor yet, since not enough exits support it yet.
20466 o Major features (geoip database):
20467 - Maxmind began labelling Tor relays as being in country "A1",
20468 which breaks by-country node selection inside Tor. Now we use a
20469 script to replace "A1" ("Anonymous Proxy") entries in our geoip
20470 file with real country codes. This script fixes about 90% of "A1"
20471 entries automatically and uses manual country code assignments to
20472 fix the remaining 10%. See src/config/README.geoip for details.
20473 Fixes bug 6266. Also update to the December 5 2012 Maxmind GeoLite
20474 Country database, as modified above.
20476 o Major bugfixes (client-side DNS):
20477 - Turn off the client-side DNS cache by default. Updating and using
20478 the DNS cache is now configurable on a per-client-port
20479 level. SOCKSPort, DNSPort, etc lines may now contain
20480 {No,}Cache{IPv4,IPv6,}DNS lines to indicate that we shouldn't
20481 cache these types of DNS answers when we receive them from an
20482 exit node in response to an application request on this port, and
20483 {No,}UseCached{IPv4,IPv6,DNS} lines to indicate that if we have
20484 cached DNS answers of these types, we shouldn't use them. It's
20485 potentially risky to use cached DNS answers at the client, since
20486 doing so can indicate to one exit what answers we've gotten
20487 for DNS lookups in the past. With IPv6, this becomes especially
20488 problematic. Using cached DNS answers for requests on the same
20489 circuit would present less linkability risk, since all traffic
20490 on a circuit is already linkable, but it would also provide
20491 little performance benefit: the exit node caches DNS replies
20492 too. Implements a simplified version of Proposal 205. Implements
20495 o Major bugfixes (other):
20496 - Alter circuit build timeout measurement to start at the point
20497 where we begin the CREATE/CREATE_FAST step (as opposed to circuit
20498 initialization). This should make our timeout measurements more
20499 uniform. Previously, we were sometimes including ORconn setup time
20500 in our circuit build time measurements. Should resolve bug 3443.
20501 - Fix an assertion that could trigger in hibernate_go_dormant() when
20502 closing an or_connection_t: call channel_mark_for_close() rather
20503 than connection_mark_for_close(). Fixes bug 7267. Bugfix on
20505 - Include the geoip6 IPv6 GeoIP database in the tarball. Fixes bug
20506 7655; bugfix on 0.2.4.6-alpha.
20509 - Add a new torrc option "ServerTransportListenAddr" to let bridge
20510 operators select the address where their pluggable transports will
20511 listen for connections. Resolves ticket 7013.
20512 - Allow an optional $ before the node identity digest in the
20513 controller command GETINFO ns/id/<identity>, for consistency with
20514 md/id/<identity> and desc/id/<identity>. Resolves ticket 7059.
20515 - Log packaged cell fullness as part of the heartbeat message.
20516 Diagnosis to try to determine the extent of bug 7743.
20518 o Minor features (IPv6):
20519 - AutomapHostsOnResolve now supports IPv6 addresses. By default, we
20520 prefer to hand out virtual IPv6 addresses, since there are more of
20521 them and we can't run out. To override this behavior and make IPv4
20522 addresses preferred, set NoPreferIPv6Automap on whatever SOCKSPort
20523 or DNSPort you're using for resolving. Implements ticket 7571.
20524 - AutomapHostsOnResolve responses are now randomized, to avoid
20525 annoying situations where Tor is restarted and applications
20526 connect to the wrong addresses.
20527 - Never try more than 1000 times to pick a new virtual address when
20528 AutomapHostsOnResolve is set. That's good enough so long as we
20529 aren't close to handing out our entire virtual address space;
20530 if you're getting there, it's best to switch to IPv6 virtual
20534 - The ADDRMAP command can no longer generate an ill-formed error
20535 code on a failed MAPADDRESS. It now says "internal" rather than
20536 an English sentence fragment with spaces in the middle. Bugfix on
20537 Tor 0.2.0.19-alpha.
20538 - Fix log messages and comments to avoid saying "GMT" when we mean
20539 "UTC". Fixes bug 6113.
20540 - Compile on win64 using mingw64. Fixes bug 7260; patches from
20542 - Fix a crash when debugging unit tests on Windows: deallocate a
20543 shared library with FreeLibrary, not CloseHandle. Fixes bug 7306;
20544 bugfix on 0.2.2.17-alpha. Reported by "ultramage".
20547 - The DirServer option is now DirAuthority, for consistency with
20548 current naming patterns. You can still use the old DirServer form.
20550 o Code simplification and refactoring:
20551 - Move the client-side address-map/virtual-address/DNS-cache code
20552 out of connection_edge.c into a new addressmap.c module.
20553 - Remove unused code for parsing v1 directories and "running routers"
20554 documents. Fixes bug 6887.
20557 Changes in version 0.2.3.25 - 2012-11-19
20558 The Tor 0.2.3 release series is dedicated to the memory of Len "rabbi"
20559 Sassaman (1980-2011), a long-time cypherpunk, anonymity researcher,
20560 Mixmaster maintainer, Pynchon Gate co-designer, CodeCon organizer,
20561 programmer, and friend. Unstinting in his dedication to the cause of
20562 freedom, he inspired and helped many of us as we began our work on
20563 anonymity, and inspires us still. Please honor his memory by writing
20564 software to protect people's freedoms, and by helping others to do so.
20566 Tor 0.2.3.25, the first stable release in the 0.2.3 branch, features
20567 significantly reduced directory overhead (via microdescriptors),
20568 enormous crypto performance improvements for fast relays on new
20569 enough hardware, a new v3 TLS handshake protocol that can better
20570 resist fingerprinting, support for protocol obfuscation plugins (aka
20571 pluggable transports), better scalability for hidden services, IPv6
20572 support for bridges, performance improvements like allowing clients
20573 to skip the first round-trip on the circuit ("optimistic data") and
20574 refilling token buckets more often, a new "stream isolation" design
20575 to isolate different applications on different circuits, and many
20576 stability, security, and privacy fixes.
20579 - Tor tries to wipe potentially sensitive data after using it, so
20580 that if some subsequent security failure exposes Tor's memory,
20581 the damage will be limited. But we had a bug where the compiler
20582 was eliminating these wipe operations when it decided that the
20583 memory was no longer visible to a (correctly running) program,
20584 hence defeating our attempt at defense in depth. We fix that
20585 by using OpenSSL's OPENSSL_cleanse() operation, which a compiler
20586 is unlikely to optimize away. Future versions of Tor may use
20587 a less ridiculously heavy approach for this. Fixes bug 7352.
20588 Reported in an article by Andrey Karpov.
20591 - Fix a harmless bug when opting against publishing a relay descriptor
20592 because DisableNetwork is set. Fixes bug 7464; bugfix on
20596 Changes in version 0.2.4.6-alpha - 2012-11-13
20597 Tor 0.2.4.6-alpha fixes an assert bug that has been plaguing relays,
20598 makes our defense-in-depth memory wiping more reliable, and begins to
20599 count IPv6 addresses in bridge statistics,
20602 - Fix an assertion failure that could occur when closing a connection
20603 with a spliced rendezvous circuit. Fix for bug 7212; bugfix on
20605 - Tor tries to wipe potentially sensitive data after using it, so
20606 that if some subsequent security failure exposes Tor's memory,
20607 the damage will be limited. But we had a bug where the compiler
20608 was eliminating these wipe operations when it decided that the
20609 memory was no longer visible to a (correctly running) program,
20610 hence defeating our attempt at defense in depth. We fix that
20611 by using OpenSSL's OPENSSL_cleanse() operation, which a compiler
20612 is unlikely to optimize away. Future versions of Tor may use
20613 a less ridiculously heavy approach for this. Fixes bug 7352.
20614 Reported in an article by Andrey Karpov.
20617 - Add GeoIP database for IPv6 addresses. The new config option
20619 - Bridge statistics now count bridge clients connecting over IPv6:
20620 bridge statistics files now list "bridge-ip-versions" and
20621 extra-info documents list "geoip6-db-digest". The control protocol
20622 "CLIENTS_SEEN" and "ip-to-country" queries now support IPv6. Initial
20623 implementation by "shkoo", addressing ticket 5055.
20626 - Warn when we are binding low ports when hibernation is enabled;
20627 previously we had warned when we were _advertising_ low ports with
20628 hibernation enabled. Fixes bug 7285; bugfix on 0.2.3.9-alpha.
20629 - Fix a harmless bug when opting against publishing a relay descriptor
20630 because DisableNetwork is set. Fixes bug 7464; bugfix on
20632 - Add warning message when a managed proxy dies during configuration.
20633 Fixes bug 7195; bugfix on 0.2.4.2-alpha.
20634 - Fix a linking error when building tor-fw-helper without miniupnp.
20635 Fixes bug 7235; bugfix on 0.2.4.2-alpha. Fix by Anthony G. Basile.
20636 - Check for closing an or_connection_t without going through correct
20637 channel functions; emit a warning and then call
20638 connection_or_close_for_error() so we don't assert as in bugs 7212
20640 - Compile correctly on compilers without C99 designated initializer
20641 support. Fixes bug 7286; bugfix on 0.2.4.4-alpha.
20642 - Avoid a possible assert that can occur when channel_send_destroy() is
20643 called on a channel in CHANNEL_STATE_CLOSING, CHANNEL_STATE_CLOSED,
20644 or CHANNEL_STATE_ERROR when the Tor process is resumed after being
20645 blocked for a long interval. Fixes bug 7350; bugfix on 0.2.4.4-alpha.
20646 - Fix a memory leak on failing cases of channel_tls_process_certs_cell.
20647 Fixes bug 7422; bugfix on 0.2.4.4-alpha.
20649 o Code simplification and refactoring:
20650 - Start using OpenBSD's implementation of queue.h, so that we don't
20651 need to hand-roll our own pointer and list structures whenever we
20652 need them. (We can't rely on a sys/queue.h, since some operating
20653 systems don't have them, and the ones that do have them don't all
20654 present the same extensions.)
20657 Changes in version 0.2.4.5-alpha - 2012-10-25
20658 Tor 0.2.4.5-alpha comes hard at the heels of 0.2.4.4-alpha, to fix
20659 two important security vulnerabilities that could lead to remotely
20660 triggerable relay crashes, fix a major bug that was preventing clients
20661 from choosing suitable exit nodes, and refactor some of our code.
20663 o Major bugfixes (security, also in 0.2.3.24-rc):
20664 - Fix a group of remotely triggerable assertion failures related to
20665 incorrect link protocol negotiation. Found, diagnosed, and fixed
20666 by "some guy from France". Fix for CVE-2012-2250; bugfix on
20668 - Fix a denial of service attack by which any directory authority
20669 could crash all the others, or by which a single v2 directory
20670 authority could crash everybody downloading v2 directory
20671 information. Fixes bug 7191; bugfix on 0.2.0.10-alpha.
20673 o Major bugfixes (also in 0.2.3.24-rc):
20674 - When parsing exit policy summaries from microdescriptors, we had
20675 previously been ignoring the last character in each one, so that
20676 "accept 80,443,8080" would be treated by clients as indicating
20677 a node that allows access to ports 80, 443, and 808. That would
20678 lead to clients attempting connections that could never work,
20679 and ignoring exit nodes that would support their connections. Now
20680 clients parse these exit policy summaries correctly. Fixes bug 7192;
20681 bugfix on 0.2.3.1-alpha.
20683 o Minor bugfixes (also in 0.2.3.24-rc):
20684 - Clients now consider the ClientRejectInternalAddresses config option
20685 when using a microdescriptor consensus stanza to decide whether
20686 an exit relay would allow exiting to an internal address. Fixes
20687 bug 7190; bugfix on 0.2.3.1-alpha.
20690 - Only disable TLS session ticket support when running as a TLS
20691 server. Now clients will blend better with regular Firefox
20692 connections. Fixes bug 7189; bugfix on Tor 0.2.3.23-rc.
20694 o Code simplification and refactoring:
20695 - Start using OpenBSD's implementation of queue.h (originally by
20697 - Move the entry node code from circuitbuild.c to its own file.
20698 - Move the circuit build timeout tracking code from circuitbuild.c
20702 Changes in version 0.2.3.24-rc - 2012-10-25
20703 Tor 0.2.3.24-rc fixes two important security vulnerabilities that
20704 could lead to remotely triggerable relay crashes, and fixes
20705 a major bug that was preventing clients from choosing suitable exit
20708 o Major bugfixes (security):
20709 - Fix a group of remotely triggerable assertion failures related to
20710 incorrect link protocol negotiation. Found, diagnosed, and fixed
20711 by "some guy from France". Fix for CVE-2012-2250; bugfix on
20713 - Fix a denial of service attack by which any directory authority
20714 could crash all the others, or by which a single v2 directory
20715 authority could crash everybody downloading v2 directory
20716 information. Fixes bug 7191; bugfix on 0.2.0.10-alpha.
20719 - When parsing exit policy summaries from microdescriptors, we had
20720 previously been ignoring the last character in each one, so that
20721 "accept 80,443,8080" would be treated by clients as indicating
20722 a node that allows access to ports 80, 443, and 808. That would
20723 lead to clients attempting connections that could never work,
20724 and ignoring exit nodes that would support their connections. Now
20725 clients parse these exit policy summaries correctly. Fixes bug 7192;
20726 bugfix on 0.2.3.1-alpha.
20729 - Clients now consider the ClientRejectInternalAddresses config option
20730 when using a microdescriptor consensus stanza to decide whether
20731 an exit relay would allow exiting to an internal address. Fixes
20732 bug 7190; bugfix on 0.2.3.1-alpha.
20735 Changes in version 0.2.4.4-alpha - 2012-10-20
20736 Tor 0.2.4.4-alpha adds a new v3 directory authority, fixes a privacy
20737 vulnerability introduced by a change in OpenSSL, fixes a remotely
20738 triggerable assert, and adds new channel_t and circuitmux_t abstractions
20739 that will make it easier to test new connection transport and cell
20740 scheduling algorithms.
20742 o New directory authorities (also in 0.2.3.23-rc):
20743 - Add Faravahar (run by Sina Rabbani) as the ninth v3 directory
20744 authority. Closes ticket 5749.
20746 o Major bugfixes (security/privacy, also in 0.2.3.23-rc):
20747 - Disable TLS session tickets. OpenSSL's implementation was giving
20748 our TLS session keys the lifetime of our TLS context objects, when
20749 perfect forward secrecy would want us to discard anything that
20750 could decrypt a link connection as soon as the link connection
20751 was closed. Fixes bug 7139; bugfix on all versions of Tor linked
20752 against OpenSSL 1.0.0 or later. Found by Florent Daignière.
20753 - Discard extraneous renegotiation attempts once the V3 link
20754 protocol has been initiated. Failure to do so left us open to
20755 a remotely triggerable assertion failure. Fixes CVE-2012-2249;
20756 bugfix on 0.2.3.6-alpha. Reported by "some guy from France".
20758 o Internal abstraction features:
20759 - Introduce new channel_t abstraction between circuits and
20760 or_connection_t to allow for implementing alternate OR-to-OR
20761 transports. A channel_t is an abstract object which can either be a
20762 cell-bearing channel, which is responsible for authenticating and
20763 handshaking with the remote OR and transmitting cells to and from
20764 it, or a listening channel, which spawns new cell-bearing channels
20765 at the request of remote ORs. Implements part of ticket 6465.
20766 - Also new is the channel_tls_t subclass of channel_t, adapting it
20767 to the existing or_connection_t code. The V2/V3 protocol handshaking
20768 code which formerly resided in command.c has been moved below the
20769 channel_t abstraction layer and may be found in channeltls.c now.
20770 Implements the rest of ticket 6465.
20771 - Introduce new circuitmux_t storing the queue of circuits for
20772 a channel; this encapsulates and abstracts the queue logic and
20773 circuit selection policy, and allows the latter to be overridden
20774 easily by switching out a policy object. The existing EWMA behavior
20775 is now implemented as a circuitmux_policy_t. Resolves ticket 6816.
20777 o Required libraries:
20778 - Tor now requires OpenSSL 0.9.8 or later. OpenSSL 1.0.0 or later is
20779 strongly recommended.
20782 - Warn users who run hidden services on a Tor client with
20783 UseEntryGuards disabled that their hidden services will be
20784 vulnerable to http://freehaven.net/anonbib/#hs-attack06 (the
20785 attack which motivated Tor to support entry guards in the first
20786 place). Resolves ticket 6889.
20787 - Tor now builds correctly on Bitrig, an OpenBSD fork. Patch from
20788 dhill. Resolves ticket 6982.
20789 - Option OutboundBindAddress can be specified multiple times and
20790 accepts IPv6 addresses. Resolves ticket 6876.
20792 o Minor bugfixes (also in 0.2.3.23-rc):
20793 - Don't serve or accept v2 hidden service descriptors over a
20794 relay's DirPort. It's never correct to do so, and disabling it
20795 might make it more annoying to exploit any bugs that turn up in the
20796 descriptor-parsing code. Fixes bug 7149.
20797 - Fix two cases in src/or/transports.c where we were calling
20798 fmt_addr() twice in a parameter list. Bug found by David
20799 Fifield. Fixes bug 7014; bugfix on 0.2.3.9-alpha.
20800 - Fix memory leaks whenever we logged any message about the "path
20801 bias" detection. Fixes bug 7022; bugfix on 0.2.3.21-rc.
20802 - When relays refuse a "create" cell because their queue of pending
20803 create cells is too big (typically because their cpu can't keep up
20804 with the arrival rate), send back reason "resource limit" rather
20805 than reason "internal", so network measurement scripts can get a
20806 more accurate picture. Fixes bug 7037; bugfix on 0.1.1.11-alpha.
20809 - Command-line option "--version" implies "--quiet". Fixes bug 6997.
20810 - Free some more still-in-use memory at exit, to make hunting for
20811 memory leaks easier. Resolves bug 7029.
20812 - When a Tor client gets a "truncated" relay cell, the first byte of
20813 its payload specifies why the circuit was truncated. We were
20814 ignoring this 'reason' byte when tearing down the circuit, resulting
20815 in the controller not being told why the circuit closed. Now we
20816 pass the reason from the truncated cell to the controller. Bugfix
20817 on 0.1.2.3-alpha; fixes bug 7039.
20818 - Downgrade "Failed to hand off onionskin" messages to "debug"
20819 severity, since they're typically redundant with the "Your computer
20820 is too slow" messages. Fixes bug 7038; bugfix on 0.2.2.16-alpha.
20821 - Make clients running with IPv6 bridges connect over IPv6 again,
20822 even without setting new config options ClientUseIPv6 and
20823 ClientPreferIPv6ORPort. Fixes bug 6757; bugfix on 0.2.4.1-alpha.
20824 - Use square brackets around IPv6 addresses in numerous places
20825 that needed them, including log messages, HTTPS CONNECT proxy
20826 requests, TransportProxy statefile entries, and pluggable transport
20827 extra-info lines. Fixes bug 7011; patch by David Fifield.
20829 o Code refactoring and cleanup:
20830 - Source files taken from other packages now reside in src/ext;
20831 previously they were scattered around the rest of Tor.
20832 - Avoid use of reserved identifiers in our C code. The C standard
20833 doesn't like us declaring anything that starts with an
20834 underscore, so let's knock it off before we get in trouble. Fix
20835 for bug 1031; bugfix on the first Tor commit.
20838 Changes in version 0.2.3.23-rc - 2012-10-20
20839 Tor 0.2.3.23-rc adds a new v3 directory authority, fixes a privacy
20840 vulnerability introduced by a change in OpenSSL, and fixes a variety
20841 of smaller bugs in preparation for the release.
20843 o New directory authorities:
20844 - Add Faravahar (run by Sina Rabbani) as the ninth v3 directory
20845 authority. Closes ticket 5749.
20847 o Major bugfixes (security/privacy):
20848 - Disable TLS session tickets. OpenSSL's implementation was giving
20849 our TLS session keys the lifetime of our TLS context objects, when
20850 perfect forward secrecy would want us to discard anything that
20851 could decrypt a link connection as soon as the link connection
20852 was closed. Fixes bug 7139; bugfix on all versions of Tor linked
20853 against OpenSSL 1.0.0 or later. Found by Florent Daignière.
20854 - Discard extraneous renegotiation attempts once the V3 link
20855 protocol has been initiated. Failure to do so left us open to
20856 a remotely triggerable assertion failure. Fixes CVE-2012-2249;
20857 bugfix on 0.2.3.6-alpha. Reported by "some guy from France".
20860 - Fix a possible crash bug when checking for deactivated circuits
20861 in connection_or_flush_from_first_active_circuit(). Fixes bug 6341;
20862 bugfix on 0.2.2.7-alpha. Bug report and fix received pseudonymously.
20864 o Minor bugfixes (on 0.2.3.x):
20865 - Fix two cases in src/or/transports.c where we were calling
20866 fmt_addr() twice in a parameter list. Bug found by David
20867 Fifield. Fixes bug 7014; bugfix on 0.2.3.9-alpha.
20868 - Convert an assert in the pathbias code to a log message. The assert
20869 appears to only be triggerable by Tor2Web mode. Fixes bug 6866;
20870 bugfix on 0.2.3.17-beta.
20871 - Fix memory leaks whenever we logged any message about the "path
20872 bias" detection. Fixes bug 7022; bugfix on 0.2.3.21-rc.
20874 o Minor bugfixes (on 0.2.2.x and earlier):
20875 - Don't serve or accept v2 hidden service descriptors over a relay's
20876 DirPort. It's never correct to do so, and disabling it might
20877 make it more annoying to exploit any bugs that turn up in the
20878 descriptor-parsing code. Fixes bug 7149.
20879 - When relays refuse a "create" cell because their queue of pending
20880 create cells is too big (typically because their cpu can't keep up
20881 with the arrival rate), send back reason "resource limit" rather
20882 than reason "internal", so network measurement scripts can get a
20883 more accurate picture. Bugfix on 0.1.1.11-alpha; fixes bug 7037.
20884 - Correct file sizes when reading binary files on Cygwin, to avoid
20885 a bug where Tor would fail to read its state file. Fixes bug 6844;
20886 bugfix on 0.1.2.7-alpha.
20887 - Avoid undefined behavior when parsing the list of supported
20888 rendezvous/introduction protocols in a hidden service descriptor.
20889 Previously, Tor would have confused (as-yet-unused) protocol version
20890 numbers greater than 32 with lower ones on many platforms. Fixes
20891 bug 6827; bugfix on 0.2.0.10-alpha. Found by George Kadianakis.
20893 o Documentation fixes:
20894 - Clarify that hidden services are TCP only. Fixes bug 6024.
20897 Changes in version 0.2.4.3-alpha - 2012-09-22
20898 Tor 0.2.4.3-alpha fixes another opportunity for a remotely triggerable
20899 assertion, resumes letting relays test reachability of their DirPort,
20900 and cleans up a bunch of smaller bugs.
20903 - Fix an assertion failure in tor_timegm() that could be triggered
20904 by a badly formatted directory object. Bug found by fuzzing with
20905 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
20908 - Fix a possible crash bug when checking for deactivated circuits
20909 in connection_or_flush_from_first_active_circuit(). Fixes bug 6341;
20910 bugfix on 0.2.2.7-alpha. Bug report and fix received pseudonymously.
20911 - Allow routers to detect that their own DirPorts are running. When
20912 we removed support for versions_supports_begindir, we also
20913 accidentally removed the mechanism we used to self-test our
20914 DirPort. Diagnosed with help from kargig. Fixes bugs 6814 and 6815;
20915 bugfix on 0.2.4.2-alpha.
20917 o Security features:
20918 - Switch to a completely time-invariant approach for picking nodes
20919 weighted by bandwidth. Our old approach would run through the
20920 part of the loop after it had made its choice slightly slower
20921 than it ran through the part of the loop before it had made its
20922 choice. Addresses ticket 6538.
20923 - Disable the use of Guard nodes when in Tor2WebMode. Guard usage
20924 by tor2web clients allows hidden services to identify tor2web
20925 clients through their repeated selection of the same rendezvous
20926 and introduction point circuit endpoints (their guards). Resolves
20930 - Enable Tor to read configuration, state, and key information from
20931 a FIFO. Previously Tor would only read from files with a positive
20932 stat.st_size. Code from meejah; fixes bug 6044.
20935 - Correct file sizes when reading binary files on Cygwin, to avoid
20936 a bug where Tor would fail to read its state file. Fixes bug 6844;
20937 bugfix on 0.1.2.7-alpha.
20938 - Correctly handle votes with more than 31 flags. Fixes bug 6853;
20939 bugfix on 0.2.0.3-alpha.
20940 - When complaining about a client port on a public address, log
20941 which address we're complaining about. Fixes bug 4020; bugfix on
20942 0.2.3.3-alpha. Patch by Tom Fitzhenry.
20943 - Convert an assert in the pathbias code to a log message. The assert
20944 appears to only be triggerable by Tor2Web mode. Fixes bug 6866;
20945 bugfix on 0.2.3.17-beta.
20946 - Our new buildsystem was overzealous about rebuilding manpages: it
20947 would rebuild them all whenever any one of them changed. Now our
20948 dependency checking should be correct. Fixes bug 6843; bugfix on
20950 - Don't do reachability testing over IPv6 unless AuthDirPublishIPv6
20951 is set. Fixes bug 6880. Bugfix on 0.2.4.1-alpha.
20952 - Correct log printout about which address family is preferred
20953 when connecting to a bridge with both an IPv4 and IPv6 OR port.
20954 Fixes bug 6884; bugfix on 0.2.4.1-alpha.
20956 o Minor bugfixes (code cleanliness):
20957 - Fix round_to_power_of_2() so it doesn't invoke undefined behavior
20958 with large values. This situation was untriggered, but nevertheless
20959 incorrect. Fixes bug 6831; bugfix on 0.2.0.1-alpha.
20960 - Reject consensus votes with more than 64 known-flags. We aren't even
20961 close to that limit yet, and our code doesn't handle it correctly.
20962 Fixes bug 6833; bugfix on 0.2.0.1-alpha.
20963 - Avoid undefined behavior when parsing the list of supported
20964 rendezvous/introduction protocols in a hidden service descriptor.
20965 Previously, Tor would have confused (as-yet-unused) protocol version
20966 numbers greater than 32 with lower ones on many platforms. Fixes
20967 bug 6827; bugfix on 0.2.0.10-alpha. Found by George Kadianakis.
20968 - Fix handling of rendezvous client authorization types over 8.
20969 Fixes bug 6861; bugfix on 0.2.1.5-alpha.
20970 - Fix building with older versions of GCC (2.95, for one) that don't
20971 like preprocessor directives inside macro arguments. Found by
20972 grarpamp. Fixes bug 6842; bugfix on 0.2.4.2-alpha.
20973 - Switch weighted node selection rule from using a list of doubles
20974 to using a list of int64_t. This change should make the process
20975 slightly easier to debug and maintain. Needed to finish ticket 6538.
20977 o Code simplification and refactoring:
20978 - Move the generic "config" code into a new file, and have "config.c"
20979 hold only torrc- and state-related code. Resolves ticket 6823.
20980 - Move the core of our "choose a weighted element at random" logic
20981 into its own function, and give it unit tests. Now the logic is
20982 testable, and a little less fragile too.
20983 - Removed the testing_since field of node_t, which hasn't been used
20984 for anything since 0.2.0.9-alpha.
20986 o Documentation fixes:
20987 - Clarify that hidden services are TCP only. Fixes bug 6024.
20988 - Resolve a typo in torrc.sample.in. Fixes bug 6819; bugfix on
20992 Changes in version 0.2.3.22-rc - 2012-09-11
20993 Tor 0.2.3.22-rc fixes another opportunity for a remotely triggerable
20997 - Fix an assertion failure in tor_timegm() that could be triggered
20998 by a badly formatted directory object. Bug found by fuzzing with
20999 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
21002 - Avoid segfault when starting up having run with an extremely old
21003 version of Tor and parsing its state file. Fixes bug 6801; bugfix
21007 Changes in version 0.2.2.39 - 2012-09-11
21008 Tor 0.2.2.39 fixes two more opportunities for remotely triggerable
21012 - Fix an assertion failure in tor_timegm() that could be triggered
21013 by a badly formatted directory object. Bug found by fuzzing with
21014 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
21015 - Do not crash when comparing an address with port value 0 to an
21016 address policy. This bug could have been used to cause a remote
21017 assertion failure by or against directory authorities, or to
21018 allow some applications to crash clients. Fixes bug 6690; bugfix
21022 Changes in version 0.2.4.2-alpha - 2012-09-10
21023 Tor 0.2.4.2-alpha enables port forwarding for pluggable transports,
21024 raises the default rate limiting even more, and makes the bootstrapping
21025 log messages less noisy.
21028 - Automatically forward the TCP ports of pluggable transport
21029 proxies using tor-fw-helper if PortForwarding is enabled. Implements
21033 - Raise the default BandwidthRate/BandwidthBurst values from 5MB/10MB
21034 to 1GB/1GB. The previous defaults were intended to be "basically
21035 infinite", but it turns out they're now limiting our 100mbit+
21036 relays and bridges. Fixes bug 6605; bugfix on 0.2.0.10-alpha (the
21037 last time we raised it).
21040 - Detect when we're running with a version of OpenSSL other than the
21041 one we compiled with. This has occasionally given people hard-to-
21043 - Log fewer lines at level "notice" about our OpenSSL and Libevent
21044 versions and capabilities when everything is going right. Resolves
21045 part of ticket 6736.
21046 - Directory authorities no long accept descriptors for any version of
21047 Tor before 0.2.2.35, or for any 0.2.3 release before 0.2.3.10-alpha.
21048 These versions are insecure, unsupported, or both. Implements
21052 - Rename the (internal-use-only) UsingTestingNetworkDefaults option
21053 to start with a triple-underscore so the controller won't touch it.
21054 Patch by Meejah. Fixes bug 3155. Bugfix on 0.2.2.23-alpha.
21055 - Avoid segfault when starting up having run with an extremely old
21056 version of Tor and parsing its state file. Fixes bug 6801; bugfix
21058 - Rename the (testing-use-only) _UseFilteringSSLBufferevents option
21059 so it doesn't start with _. Fixes bug 3155. Bugfix on 0.2.3.1-alpha.
21060 - Don't follow the NULL pointer if microdescriptor generation fails.
21061 (This does not appear to be triggerable, but it's best to be safe.)
21062 Found by "f. tp.". Fixes bug 6797; bugfix on 0.2.4.1-alpha.
21063 - Fix mis-declared dependencies on src/common/crypto.c and
21064 src/or/tor_main.c that could break out-of-tree builds under some
21065 circumstances. Fixes bug 6778; bugfix on 0.2.4.1-alpha.
21066 - Avoid a warning when building common_sha1.i out of tree. Fixes bug
21067 6778; bugfix on 0.2.4.1-alpha.
21068 - Fix a harmless (in this case) build warning for implicitly
21069 converting a strlen() to an int. Bugfix on 0.2.4.1-alpha.
21071 o Removed features:
21072 - Now that all versions before 0.2.2.x are disallowed, we no longer
21073 need to work around their missing features. Thus we can remove a
21074 bunch of compatibility code.
21076 o Code refactoring:
21077 - Tweak tor-fw-helper to accept an arbitrary amount of arbitrary
21078 TCP ports to forward. In the past it only accepted two ports:
21079 the ORPort and the DirPort.
21082 Changes in version 0.2.4.1-alpha - 2012-09-05
21083 Tor 0.2.4.1-alpha lets bridges publish their pluggable transports to
21084 bridgedb; lets relays use IPv6 addresses and directory authorities
21085 advertise them; and switches to a cleaner build interface.
21087 This is the first alpha release in a new series, so expect there to
21088 be bugs. Users who would rather test out a more stable branch should
21089 stay with 0.2.3.x for now.
21091 o Major features (bridges):
21092 - Bridges now report the pluggable transports they support to the
21093 bridge authority, so it can pass the supported transports on to
21094 bridgedb and/or eventually do reachability testing. Implements
21097 o Major features (IPv6):
21098 - Bridge authorities now accept IPv6 bridge addresses and include
21099 them in network status documents. Implements ticket 5534.
21100 - Clients who set "ClientUseIPv6 1" may connect to entry nodes over
21101 IPv6. Set "ClientPreferIPv6ORPort 1" to make this even more likely
21102 to happen. Implements ticket 5535.
21103 - All kind of relays, not just bridges, can now advertise an IPv6
21104 OR port. Implements ticket 6362.
21105 - Directory authorities vote on IPv6 OR ports using the new consensus
21106 method 14. Implements ticket 6363.
21108 o Major features (build):
21109 - Switch to a nonrecursive Makefile structure. Now instead of each
21110 Makefile.am invoking other Makefile.am's, there is a master
21111 Makefile.am that includes the others. This change makes our build
21112 process slightly more maintainable, and improves parallelism for
21113 building with make -j. Original patch by Stewart Smith; various
21114 fixes by Jim Meyering.
21115 - Where available, we now use automake's "silent" make rules by
21116 default, so that warnings are easier to spot. You can get the old
21117 behavior with "make V=1". Patch by Stewart Smith for ticket 6522.
21119 o Minor features (code security and spec conformance):
21120 - Clear keys and key-derived material left on the stack in
21121 rendservice.c and rendclient.c. Check return value of
21122 crypto_pk_write_private_key_to_string() in rend_service_load_keys().
21123 These fixes should make us more forward-secure against cold-boot
21124 attacks and the like. Fixes bug 2385.
21125 - Reject EXTEND cells sent to nonexistent streams. According to the
21126 spec, an EXTEND cell sent to _any_ nonzero stream ID is invalid, but
21127 we were only checking for stream IDs that were currently in use.
21128 Found while hunting for more instances of bug 6271. Bugfix on
21129 0.0.2pre8, which introduced incremental circuit construction.
21131 o Minor features (streamlining);
21132 - No longer include the "opt" prefix when generating routerinfos
21133 or v2 directories: it has been needless since Tor 0.1.2. Closes
21135 - Remove some now-needless code that tried to aggressively flush
21136 OR connections as data was added to them. Since 0.2.0.1-alpha, our
21137 cell queue logic has saved us from the failure mode that this code
21138 was supposed to prevent. Removing this code will limit the number
21139 of baroque control flow paths through Tor's network logic. Reported
21140 pseudonymously on IRC. Fixes bug 6468; bugfix on 0.2.0.1-alpha.
21142 o Minor features (controller):
21143 - Add a "GETINFO signal/names" control port command. Implements
21145 - Provide default values for all options via "GETINFO config/defaults".
21146 Implements ticket 4971.
21148 o Minor features (IPv6):
21149 - New config option "AuthDirHasIPv6Connectivity 1" that directory
21150 authorities should set if they have IPv6 connectivity and want to
21151 do reachability tests for IPv6 relays. Implements feature 5974.
21152 - A relay with an IPv6 OR port now sends that address in NETINFO
21153 cells (in addition to its other address). Implements ticket 6364.
21155 o Minor features (log messages):
21156 - Omit the first heartbeat log message, because it never has anything
21157 useful to say, and it clutters up the bootstrapping messages.
21158 Resolves ticket 6758.
21159 - Don't log about reloading the microdescriptor cache at startup. Our
21160 bootstrap warnings are supposed to tell the user when there's a
21161 problem, and our bootstrap notices say when there isn't. Resolves
21162 ticket 6759; bugfix on 0.2.2.6-alpha.
21163 - Don't log "I learned some more directory information" when we're
21164 reading cached directory information. Reserve it for when new
21165 directory information arrives in response to a fetch. Resolves
21167 - Prevent rounding error in path bias counts when scaling
21168 them down, and use the correct scale factor default. Also demote
21169 some path bias related log messages down a level and make others
21170 less scary sounding. Fixes bug 6647. Bugfix against 0.2.3.17-beta.
21171 - We no longer warn so much when generating manpages from their
21174 o Code simplifications and refactoring:
21175 - Enhance our internal sscanf replacement so that we can eliminate
21176 the last remaining uses of the system sscanf. (Though those uses
21177 of sscanf were safe, sscanf itself is generally error prone, so
21178 we want to eliminate when we can.) Fixes ticket 4195 and Coverity
21180 - Move ipv6_preferred from routerinfo_t to node_t. Addresses bug 4620.
21181 - Move last_reachable and testing_since from routerinfo_t to node_t.
21182 Implements ticket 5529.
21183 - Add replaycache_t structure, functions and unit tests, then refactor
21184 rend_service_introduce() to be more clear to read, improve, debug,
21185 and test. Resolves bug 6177.
21186 - Finally remove support for malloc_good_size and malloc_usable_size.
21187 We had hoped that these functions would let us eke a little more
21188 memory out of our malloc implementation. Unfortunately, the only
21189 implementations that provided these functions are also ones that
21190 are already efficient about not overallocation: they never got us
21191 more than 7 or so bytes per allocation. Removing them saves us a
21192 little code complexity and a nontrivial amount of build complexity.
21194 o New requirements:
21195 - Tor maintainers now require Automake version 1.9 or later to build
21196 Tor from the Git repository. (Automake is not required when building
21197 from a source distribution.)
21200 Changes in version 0.2.3.21-rc - 2012-09-05
21201 Tor 0.2.3.21-rc is the fourth release candidate for the Tor 0.2.3.x
21202 series. It fixes a trio of potential security bugs, fixes a bug where
21203 we were leaving some of the fast relays out of the microdescriptor
21204 consensus, resumes interpreting "ORPort 0" and "DirPort 0" correctly,
21205 and cleans up other smaller issues.
21207 o Major bugfixes (security):
21208 - Tear down the circuit if we get an unexpected SENDME cell. Clients
21209 could use this trick to make their circuits receive cells faster
21210 than our flow control would have allowed, or to gum up the network,
21211 or possibly to do targeted memory denial-of-service attacks on
21212 entry nodes. Fixes bug 6252. Bugfix on the 54th commit on Tor --
21213 from July 2002, before the release of Tor 0.0.0. We had committed
21214 this patch previously, but we had to revert it because of bug 6271.
21215 Now that 6271 is fixed, this patch appears to work.
21216 - Reject any attempt to extend to an internal address. Without
21217 this fix, a router could be used to probe addresses on an internal
21218 network to see whether they were accepting connections. Fixes bug
21219 6710; bugfix on 0.0.8pre1.
21220 - Do not crash when comparing an address with port value 0 to an
21221 address policy. This bug could have been used to cause a remote
21222 assertion failure by or against directory authorities, or to
21223 allow some applications to crash clients. Fixes bug 6690; bugfix
21227 - Remove the upper bound on microdescriptor length. We were hitting
21228 the limit for routers with complex exit policies or family
21229 declarations, causing clients to not use them. Fixes the first
21230 piece of bug 6404; fix on 0.2.2.6-alpha.
21231 - Detect "ORPort 0" as meaning, uniformly, that we're not running
21232 as a relay. Previously, some of our code would treat the presence
21233 of any ORPort line as meaning that we should act like a relay,
21234 even though our new listener code would correctly not open any
21235 ORPorts for ORPort 0. Similar bugs in other Port options are also
21236 fixed. Fixes the first half of bug 6507; bugfix on 0.2.3.3-alpha.
21239 - Avoid a pair of double-free and use-after-mark bugs that can
21240 occur with certain timings in canceled and re-received DNS
21241 requests. Fixes bug 6472; bugfix on 0.0.7rc1.
21242 - Fix build and 64-bit compile warnings from --enable-openbsd-malloc.
21243 Fixes bug 6379. Bugfix on 0.2.0.20-rc.
21244 - Allow one-hop directory fetching circuits the full "circuit build
21245 timeout" period, rather than just half of it, before failing them
21246 and marking the relay down. This fix should help reduce cases where
21247 clients declare relays (or worse, bridges) unreachable because
21248 the TLS handshake takes a few seconds to complete. Fixes bug 6743;
21249 bugfix on 0.2.2.2-alpha, where we changed the timeout from a static
21251 - Authorities no longer include any router in their microdescriptor
21252 consensuses for which they couldn't generate or agree on a
21253 microdescriptor. Fixes the second piece of bug 6404; fix on
21255 - Detect and reject attempts to specify both "FooPort" and
21256 "FooPort 0" in the same configuration domain. (It's still okay
21257 to have a FooPort in your configuration file, and use "FooPort 0"
21258 on the command line to disable it.) Fixes the second half of bug
21259 6507; bugfix on 0.2.3.3-alpha.
21260 - Make wildcarded addresses (that is, ones beginning with "*.") work
21261 when provided via the controller's MapAddress command. Previously,
21262 they were accepted, but we never actually noticed that they were
21263 wildcards. Fixes bug 6244; bugfix on 0.2.3.9-alpha.
21264 - Avoid crashing on a malformed state file where EntryGuardPathBias
21265 precedes EntryGuard. Fix for bug 6774; bugfix on 0.2.3.17-beta.
21266 - Add a (probably redundant) memory clear between iterations of
21267 the router status voting loop, to prevent future coding errors
21268 where data might leak between iterations of the loop. Resolves
21271 o Minor bugfixes (log messages):
21272 - Downgrade "set buildtimeout to low value" messages to "info"
21273 severity; they were never an actual problem, there was never
21274 anything reasonable to do about them, and they tended to spam logs
21275 from time to time. Fixes bug 6251; bugfix on 0.2.2.2-alpha.
21276 - Downgrade path-bias warning messages to "info". We'll try to get
21277 them working better in 0.2.4. Add internal circuit construction
21278 state to protect against the noisy warn message "Unexpectedly high
21279 circuit_successes". Also add some additional rate-limited notice
21280 messages to help determine the root cause of the warn. Fixes bug
21281 6475. Bugfix against 0.2.3.17-beta.
21282 - Move log message when unable to find a microdesc in a routerstatus
21283 entry to parse time. Previously we'd spam this warning every time
21284 we tried to figure out which microdescriptors to download. Fixes
21285 the third piece of bug 6404; fix on 0.2.3.18-rc.
21288 - Consider new, removed or changed IPv6 OR ports a non-cosmetic
21289 change when the authority is deciding whether to accept a newly
21290 uploaded descriptor. Implements ticket 6423.
21291 - Add missing documentation for consensus and microdesc files.
21292 Resolves ticket 6732.
21295 Changes in version 0.2.2.38 - 2012-08-12
21296 Tor 0.2.2.38 fixes a remotely triggerable crash bug, and fixes a timing
21297 attack that could in theory leak path information.
21300 - Avoid an uninitialized memory read when reading a vote or consensus
21301 document that has an unrecognized flavor name. This read could
21302 lead to a remote crash bug. Fixes bug 6530; bugfix on 0.2.2.6-alpha.
21303 - Try to leak less information about what relays a client is
21304 choosing to a side-channel attacker. Previously, a Tor client would
21305 stop iterating through the list of available relays as soon as it
21306 had chosen one, thus finishing a little earlier when it picked
21307 a router earlier in the list. If an attacker can recover this
21308 timing information (nontrivial but not proven to be impossible),
21309 they could learn some coarse-grained information about which relays
21310 a client was picking (middle nodes in particular are likelier to
21311 be affected than exits). The timing attack might be mitigated by
21312 other factors (see bug 6537 for some discussion), but it's best
21313 not to take chances. Fixes bug 6537; bugfix on 0.0.8rc1.
21316 Changes in version 0.2.3.20-rc - 2012-08-05
21317 Tor 0.2.3.20-rc is the third release candidate for the Tor 0.2.3.x
21318 series. It fixes a pair of code security bugs and a potential anonymity
21319 issue, updates our RPM spec files, and cleans up other smaller issues.
21322 - Avoid read-from-freed-memory and double-free bugs that could occur
21323 when a DNS request fails while launching it. Fixes bug 6480;
21324 bugfix on 0.2.0.1-alpha.
21325 - Avoid an uninitialized memory read when reading a vote or consensus
21326 document that has an unrecognized flavor name. This read could
21327 lead to a remote crash bug. Fixes bug 6530; bugfix on 0.2.2.6-alpha.
21328 - Try to leak less information about what relays a client is
21329 choosing to a side-channel attacker. Previously, a Tor client would
21330 stop iterating through the list of available relays as soon as it
21331 had chosen one, thus finishing a little earlier when it picked
21332 a router earlier in the list. If an attacker can recover this
21333 timing information (nontrivial but not proven to be impossible),
21334 they could learn some coarse-grained information about which relays
21335 a client was picking (middle nodes in particular are likelier to
21336 be affected than exits). The timing attack might be mitigated by
21337 other factors (see bug 6537 for some discussion), but it's best
21338 not to take chances. Fixes bug 6537; bugfix on 0.0.8rc1.
21341 - Try to make the warning when giving an obsolete SOCKSListenAddress
21342 a little more useful.
21343 - Terminate active server managed proxies if Tor stops being a
21344 relay. Addresses parts of bug 6274; bugfix on 0.2.3.6-alpha.
21345 - Provide a better error message about possible OSX Asciidoc failure
21346 reasons. Fixes bug 6436.
21347 - Warn when Tor is configured to use accounting in a way that can
21348 link a hidden service to some other hidden service or public
21349 address. Resolves ticket 6490.
21352 - Check return value of fputs() when writing authority certificate
21353 file. Fixes Coverity issue 709056; bugfix on 0.2.0.1-alpha.
21354 - Ignore ServerTransportPlugin lines when Tor is not configured as
21355 a relay. Fixes bug 6274; bugfix on 0.2.3.6-alpha.
21356 - When disabling guards for having too high a proportion of failed
21357 circuits, make sure to look at each guard. Fixes bug 6397; bugfix
21361 - Update our default RPM spec files to work with mock and rpmbuild
21362 on RHEL/Fedora. They have an updated set of dependencies and
21363 conflicts, a fix for an ancient typo when creating the "_tor"
21364 user, and better instructions. Thanks to Ondrej Mikle for the
21365 patch series. Fixes bug 6043.
21368 - Make it possible to set the TestingTorNetwork configuration
21369 option using AlternateDirAuthority and AlternateBridgeAuthority
21370 as an alternative to setting DirServer. Addresses ticket 6377.
21373 - Clarify the documentation for the Alternate*Authority options.
21375 - Fix some typos in the manpages. Patch from A. Costa. Fixes bug 6500.
21377 o Code simplification and refactoring:
21378 - Do not use SMARTLIST_FOREACH for any loop whose body exceeds
21379 10 lines. Also, don't nest them. Doing so in the past has
21380 led to hard-to-debug code. The new style is to use the
21381 SMARTLIST_FOREACH_{BEGIN,END} pair. Addresses issue 6400.
21384 Changes in version 0.2.3.19-rc - 2012-07-06
21385 Tor 0.2.3.19-rc is the second release candidate for the Tor 0.2.3.x
21386 series. It fixes the compile on Windows, reverts to a GeoIP database
21387 that isn't as broken, and fixes a flow control bug that has been around
21388 since the beginning of Tor.
21391 - Fix a bug handling SENDME cells on nonexistent streams that could
21392 result in bizarre window values. Report and patch contributed
21393 pseudonymously. Fixes part of bug 6271. This bug was introduced
21394 before the first Tor release, in svn commit r152.
21395 - Revert to the May 1 2012 Maxmind GeoLite Country database. In the
21396 June 2012 database, Maxmind marked many Tor relays as country "A1",
21397 which will cause risky behavior for clients that set EntryNodes
21398 or ExitNodes. Addresses bug 6334; bugfix on 0.2.3.17-beta.
21399 - Instead of ENOBUFS on Windows, say WSAENOBUFS. Fixes compilation
21400 on Windows. Fixes bug 6296; bugfix on 0.2.3.18-rc.
21403 - Fix wrong TCP port range in parse_port_range(). Fixes bug 6218;
21404 bugfix on 0.2.1.10-alpha.
21407 Changes in version 0.2.3.18-rc - 2012-06-28
21408 Tor 0.2.3.18-rc is the first release candidate for the Tor 0.2.3.x
21409 series. It fixes a few smaller bugs, but generally appears stable.
21410 Please test it and let us know whether it is!
21413 - Allow wildcarded mapaddress targets to be specified on the
21414 controlport. Partially fixes bug 6244; bugfix on 0.2.3.9-alpha.
21415 - Make our linker option detection code more robust against linkers
21416 such as on FreeBSD 8, where a bad combination of options completes
21417 successfully but makes an unrunnable binary. Fixes bug 6173;
21418 bugfix on 0.2.3.17-beta.
21420 o Minor bugfixes (on 0.2.2.x and earlier):
21421 - Avoid a false positive in the util/threads unit test by increasing
21422 the maximum timeout time. Fixes bug 6227; bugfix on 0.2.0.4-alpha.
21423 - Replace "Sending publish request" log messages with "Launching
21424 upload", so that they no longer confusingly imply that we're
21425 sending something to a directory we might not even be connected
21426 to yet. Fixes bug 3311; bugfix on 0.2.0.10-alpha.
21427 - Make sure to set *socket_error in all error cases in
21428 connection_connect(), so it can't produce a warning about
21429 errno being zero from errno_to_orconn_end_reason(). Bugfix on
21430 0.2.1.1-alpha; resolves ticket 6028.
21431 - Downgrade "Got a certificate, but we already have it" log messages
21432 from warning to info, except when we're a dirauth. Fixes bug 5238;
21433 bugfix on 0.2.1.7-alpha.
21434 - When checking for requested signatures on the latest consensus
21435 before serving it to a client, make sure to check the right
21436 consensus flavor. Bugfix on 0.2.2.6-alpha.
21437 - Downgrade "eventdns rejected address" message to LOG_PROTOCOL_WARN.
21438 Fixes bug 5932; bugfix on 0.2.2.7-alpha.
21440 o Minor bugfixes (on 0.2.3.x):
21441 - Make format_helper_exit_status() avoid unnecessary space padding
21442 and stop confusing log_from_pipe(). Fixes ticket 5557; bugfix
21444 - Downgrade a message about cleaning the microdescriptor cache to
21445 "info" from "notice". Fixes bug 6238; bugfix on 0.2.3.1-alpha.
21446 - Log a BUG message at severity INFO if we have a networkstatus with
21447 a missing entry for some microdescriptor. Continues on a patch
21449 - Improve the log message when a managed proxy fails to launch. Fixes
21450 bug 5099; bugfix on 0.2.3.6-alpha.
21451 - Don't do DNS lookups when parsing corrupted managed proxy protocol
21452 messages. Fixes bug 6226; bugfix on 0.2.3.6-alpha.
21453 - When formatting wildcarded address mappings for the controller,
21454 be sure to include "*." as appropriate. Partially fixes bug 6244;
21455 bugfix on 0.2.3.9-alpha.
21456 - Avoid a warning caused by using strcspn() from glibc with clang 3.0.
21457 Bugfix on 0.2.3.13-alpha.
21458 - Stop logging messages about running with circuit timeout learning
21459 enabled at severity LD_BUG. Fixes bug 6169; bugfix on 0.2.3.17-beta.
21460 - Disable a spurious warning about reading on a marked and flushing
21461 connection. We shouldn't be doing that, but apparently we
21462 sometimes do. Fixes bug 6203; bugfix on 0.2.3.17-beta.
21463 - Fix a bug that stopped AllowDotExit from working on addresses
21464 that had an entry in the DNS cache. Fixes bug 6211; bugfix on
21467 o Code simplification, refactoring, unit tests:
21468 - Move tor_gettimeofday_cached() into compat_libevent.c, and use
21469 Libevent's notion of cached time when possible.
21470 - Remove duplicate code for invoking getrlimit() from control.c.
21471 - Add a unit test for the environment_variable_names_equal function.
21474 - Document the --defaults-torrc option, and the new (in 0.2.3)
21475 semantics for overriding, extending, and clearing lists of
21476 options. Closes bug 4748.
21479 Changes in version 0.2.3.17-beta - 2012-06-15
21480 Tor 0.2.3.17-beta enables compiler and linker hardening by default,
21481 gets our TLS handshake back on track for being able to blend in with
21482 Firefox, fixes a big bug in 0.2.3.16-alpha that broke Tor's interaction
21483 with Vidalia, and otherwise continues to get us closer to a release
21487 - Enable gcc and ld hardening by default. Resolves ticket 5210.
21488 - Update TLS cipher list to match Firefox 8 and later. Resolves
21490 - Implement the client side of proposal 198: remove support for
21491 clients falsely claiming to support standard ciphersuites that
21492 they can actually provide. As of modern OpenSSL versions, it's not
21493 necessary to fake any standard ciphersuite, and doing so prevents
21494 us from using better ciphersuites in the future, since servers
21495 can't know whether an advertised ciphersuite is really supported or
21496 not. Some hosts -- notably, ones with very old versions of OpenSSL
21497 or where OpenSSL has been built with ECC disabled -- will stand
21498 out because of this change; TBB users should not be affected.
21501 - Change the default value for DynamicDHGroups (introduced in
21502 0.2.3.9-alpha) to 0. This feature can make Tor relays less
21503 identifiable by their use of the mod_ssl DH group, but at
21504 the cost of some usability (#4721) and bridge tracing (#6087)
21505 regressions. Resolves ticket 5598.
21506 - Send a CRLF at the end of each STATUS_* control protocol event. This
21507 bug tickled a bug in Vidalia which would make it freeze. Fixes
21508 bug 6094; bugfix on 0.2.3.16-alpha.
21511 - Disable writing on marked-for-close connections when they are
21512 blocked on bandwidth, to prevent busy-looping in Libevent. Fixes
21513 bug 5263; bugfix on 0.0.2pre13, where we first added a special
21514 case for flushing marked connections.
21515 - Detect SSL handshake even when the initial attempt to write the
21516 server hello fails. Fixes bug 4592; bugfix on 0.2.0.13-alpha.
21517 - Change the AllowDotExit rules so they should actually work.
21518 We now enforce AllowDotExit only immediately after receiving an
21519 address via SOCKS or DNSPort: other sources are free to provide
21520 .exit addresses after the resolution occurs. Fixes bug 3940;
21521 bugfix on 0.2.2.1-alpha.
21522 - Fix a (harmless) integer overflow in cell statistics reported by
21523 some fast relays. Fixes bug 5849; bugfix on 0.2.2.1-alpha.
21524 - Make sure circuitbuild.c checks LearnCircuitBuildTimeout in all the
21525 right places and never depends on the consensus parameters or
21526 computes adaptive timeouts when it is disabled. Fixes bug 5049;
21527 bugfix on 0.2.2.14-alpha.
21528 - When building Tor on Windows with -DUNICODE (not default), ensure
21529 that error messages, filenames, and DNS server names are always
21530 NUL-terminated when we convert them to a single-byte encoding.
21531 Fixes bug 5909; bugfix on 0.2.2.16-alpha.
21532 - Make Tor build correctly again with -DUNICODE -D_UNICODE defined.
21533 Fixes bug 6097; bugfix on 0.2.2.16-alpha.
21534 - Fix an edge case where TestingTorNetwork is set but the authorities
21535 and relays all have an uptime of zero, where the private Tor network
21536 could briefly lack support for hidden services. Fixes bug 3886;
21537 bugfix on 0.2.2.18-alpha.
21538 - Correct the manpage's descriptions for the default values of
21539 DirReqStatistics and ExtraInfoStatistics. Fixes bug 2865; bugfix
21541 - Fix the documentation for the --hush and --quiet command line
21542 options, which changed their behavior back in 0.2.3.3-alpha.
21543 - Fix compilation warning with clang 3.1. Fixes bug 6141; bugfix on
21547 - Rate-limit the "Weighted bandwidth is 0.000000" message, and add
21548 more information to it, so that we can track it down in case it
21549 returns again. Mitigates bug 5235.
21550 - Check CircuitBuildTimeout and LearnCircuitBuildTimeout in
21551 options_validate(); warn if LearnCircuitBuildTimeout is disabled and
21552 CircuitBuildTimeout is set unreasonably low. Resolves ticket 5452.
21553 - Warn the user when HTTPProxy, but no other proxy type, is
21554 configured. This can cause surprising behavior: it doesn't send
21555 all of Tor's traffic over the HTTPProxy -- it sends unencrypted
21556 directory traffic only. Resolves ticket 4663.
21557 - Issue a notice if a guard completes less than 40% of your circuits.
21558 Threshold is configurable by torrc option PathBiasNoticeRate and
21559 consensus parameter pb_noticepct. There is additional, off-by-
21560 default code to disable guards which fail too many circuits.
21561 Addresses ticket 5458.
21562 - Update to the June 6 2012 Maxmind GeoLite Country database.
21564 o Code simplifications and refactoring:
21565 - Remove validate_pluggable_transports_config(): its warning
21566 message is now handled by connection_or_connect().
21569 Changes in version 0.2.2.37 - 2012-06-06
21570 Tor 0.2.2.37 introduces a workaround for a critical renegotiation
21571 bug in OpenSSL 1.0.1 (where 20% of the Tor network can't talk to itself
21575 - Work around a bug in OpenSSL that broke renegotiation with TLS
21576 1.1 and TLS 1.2. Without this workaround, all attempts to speak
21577 the v2 Tor connection protocol when both sides were using OpenSSL
21578 1.0.1 would fail. Resolves ticket 6033.
21579 - When waiting for a client to renegotiate, don't allow it to add
21580 any bytes to the input buffer. This fixes a potential DoS issue.
21581 Fixes bugs 5934 and 6007; bugfix on 0.2.0.20-rc.
21582 - Fix an edge case where if we fetch or publish a hidden service
21583 descriptor, we might build a 4-hop circuit and then use that circuit
21584 for exiting afterwards -- even if the new last hop doesn't obey our
21585 ExitNodes config option. Fixes bug 5283; bugfix on 0.2.0.10-alpha.
21588 - Fix a build warning with Clang 3.1 related to our use of vasprintf.
21589 Fixes bug 5969. Bugfix on 0.2.2.11-alpha.
21592 - Tell GCC and Clang to check for any errors in format strings passed
21593 to the tor_v*(print|scan)f functions.
21596 Changes in version 0.2.3.16-alpha - 2012-06-05
21597 Tor 0.2.3.16-alpha introduces a workaround for a critical renegotiation
21598 bug in OpenSSL 1.0.1 (where 20% of the Tor network can't talk to itself
21599 currently). It also fixes a variety of smaller bugs and other cleanups
21600 that get us closer to a release candidate.
21602 o Major bugfixes (general):
21603 - Work around a bug in OpenSSL that broke renegotiation with TLS
21604 1.1 and TLS 1.2. Without this workaround, all attempts to speak
21605 the v2 Tor connection protocol when both sides were using OpenSSL
21606 1.0.1 would fail. Resolves ticket 6033.
21607 - When waiting for a client to renegotiate, don't allow it to add
21608 any bytes to the input buffer. This fixes a potential DoS issue.
21609 Fixes bugs 5934 and 6007; bugfix on 0.2.0.20-rc.
21610 - Pass correct OR address to managed proxies (like obfsproxy),
21611 even when ORListenAddress is used. Fixes bug 4865; bugfix on
21613 - The advertised platform of a router now includes only its operating
21614 system's name (e.g., "Linux", "Darwin", "Windows 7"), and not its
21615 service pack level (for Windows) or its CPU architecture (for Unix).
21616 We also no longer include the "git-XYZ" tag in the version. Resolves
21619 o Major bugfixes (clients):
21620 - If we are unable to find any exit that supports our predicted ports,
21621 stop calling them predicted, so that we don't loop and build
21622 hopeless circuits indefinitely. Fixes bug 3296; bugfix on 0.0.9pre6,
21623 which introduced predicted ports.
21624 - Fix an edge case where if we fetch or publish a hidden service
21625 descriptor, we might build a 4-hop circuit and then use that circuit
21626 for exiting afterwards -- even if the new last hop doesn't obey our
21627 ExitNodes config option. Fixes bug 5283; bugfix on 0.2.0.10-alpha.
21628 - Check at each new consensus whether our entry guards were picked
21629 long enough ago that we should rotate them. Previously, we only
21630 did this check at startup, which could lead to us holding a guard
21631 indefinitely. Fixes bug 5380; bugfix on 0.2.1.14-rc.
21632 - When fetching a bridge descriptor from a bridge authority,
21633 always do so anonymously, whether we have been able to open
21634 circuits or not. Partial fix for bug 1938; bugfix on 0.2.0.7-alpha.
21635 This behavior makes it *safer* to use UpdateBridgesFromAuthority,
21636 but we'll need to wait for bug 6010 before it's actually usable.
21638 o Major bugfixes (directory authorities):
21639 - When computing weight parameters, behave more robustly in the
21640 presence of a bad bwweightscale value. Previously, the authorities
21641 would crash if they agreed on a sufficiently broken weight_scale
21642 value: now, they use a reasonable default and carry on. Partial
21643 fix for 5786; bugfix on 0.2.2.17-alpha.
21644 - Check more thoroughly to prevent a rogue authority from
21645 double-voting on any consensus directory parameter. Previously,
21646 authorities would crash in this case if the total number of
21647 votes for any parameter exceeded the number of active voters,
21648 but would let it pass otherwise. Partial fix for bug 5786; bugfix
21652 - Rate-limit log messages when asked to connect anonymously to
21653 a private address. When these hit, they tended to hit fast and
21654 often. Also, don't bother trying to connect to addresses that we
21655 are sure will resolve to 127.0.0.1: getting 127.0.0.1 in a directory
21656 reply makes us think we have been lied to, even when the address the
21657 client tried to connect to was "localhost." Resolves ticket 2822.
21658 - Allow packagers to insert an extra string in server descriptor
21659 platform lines by setting the preprocessor variable TOR_BUILD_TAG.
21660 Resolves the rest of ticket 2988.
21661 - Raise the threshold of server descriptors needed (75%) and exit
21662 server descriptors needed (50%) before we will declare ourselves
21663 bootstrapped. This will make clients start building circuits a
21664 little later, but makes the initially constructed circuits less
21665 skewed and less in conflict with further directory fetches. Fixes
21667 - Close any connection that sends unrecognized junk before the
21668 handshake. Solves an issue noted in bug 4369.
21669 - Improve log messages about managed transports. Resolves ticket 5070.
21670 - Tag a bridge's descriptor as "never to be sent unencrypted".
21671 This shouldn't matter, since bridges don't open non-anonymous
21672 connections to the bridge authority and don't allow unencrypted
21673 directory connections from clients, but we might as well make
21674 sure. Closes bug 5139.
21675 - Expose our view of whether we have gone dormant to the controller,
21676 via a new "GETINFO dormant" value. Torbutton and other controllers
21677 can use this to avoid doing periodic requests through Tor while
21678 it's dormant (bug 4718). Fixes bug 5954.
21679 - Tell GCC and Clang to check for any errors in format strings passed
21680 to the tor_v*(print|scan)f functions.
21681 - Update to the May 1 2012 Maxmind GeoLite Country database.
21683 o Minor bugfixes (already included in 0.2.2.36):
21684 - Reject out-of-range times like 23:59:61 in parse_rfc1123_time().
21685 Fixes bug 5346; bugfix on 0.0.8pre3.
21686 - Correct parsing of certain date types in parse_http_time().
21687 Without this patch, If-Modified-Since would behave
21688 incorrectly. Fixes bug 5346; bugfix on 0.2.0.2-alpha. Patch from
21689 Esteban Manchado Velázques.
21690 - Make our number-parsing functions always treat too-large values
21691 as an error, even when those values exceed the width of the
21692 underlying type. Previously, if the caller provided these
21693 functions with minima or maxima set to the extreme values of the
21694 underlying integer type, these functions would return those
21695 values on overflow rather than treating overflow as an error.
21696 Fixes part of bug 5786; bugfix on 0.0.9.
21697 - If we hit the error case where routerlist_insert() replaces an
21698 existing (old) server descriptor, make sure to remove that
21699 server descriptor from the old_routers list. Fix related to bug
21700 1776. Bugfix on 0.2.2.18-alpha.
21701 - Clarify the behavior of MaxCircuitDirtiness with hidden service
21702 circuits. Fixes issue 5259.
21704 o Minor bugfixes (coding cleanup, on 0.2.2.x and earlier):
21705 - Prevent a null-pointer dereference when receiving a data cell
21706 for a nonexistent stream when the circuit in question has an
21707 empty deliver window. We don't believe this is triggerable,
21708 since we don't currently allow deliver windows to become empty,
21709 but the logic is tricky enough that it's better to make the code
21710 robust. Fixes bug 5541; bugfix on 0.0.2pre14.
21711 - Fix a memory leak when trying to launch a DNS request when the
21712 network is disabled or the nameservers are unconfigurable. Fixes
21713 bug 5916; bugfix on Tor 0.1.2.1-alpha (for the unconfigurable
21714 nameserver case) and on 0.2.3.9-alpha (for the DisableNetwork case).
21715 - Don't hold a Windows file handle open for every file mapping;
21716 the file mapping handle is sufficient. Fixes bug 5951; bugfix on
21718 - Avoid O(n^2) performance characteristics when parsing a large
21719 extrainfo cache. Fixes bug 5828; bugfix on 0.2.0.1-alpha.
21720 - Format more doubles with %f, not %lf. Patch from grarpamp to make
21721 Tor build correctly on older BSDs again. Fixes bug 3894; bugfix on
21723 - Make our replacement implementation of strtok_r() compatible with
21724 the standard behavior of strtok_r(). Patch by nils. Fixes bug 5091;
21725 bugfix on 0.2.2.1-alpha.
21726 - Fix a NULL-pointer dereference on a badly formed
21727 SETCIRCUITPURPOSE command. Found by mikeyc. Fixes bug 5796;
21728 bugfix on 0.2.2.9-alpha.
21729 - Fix a build warning with Clang 3.1 related to our use of vasprintf.
21730 Fixes bug 5969. Bugfix on 0.2.2.11-alpha.
21731 - Defensively refactor rend_mid_rendezvous() so that protocol
21732 violations and length checks happen in the beginning. Fixes
21734 - Set _WIN32_WINNT to 0x0501 consistently throughout the code, so
21735 that IPv6 stuff will compile on MSVC, and compilation issues
21736 will be easier to track down. Fixes bug 5861.
21738 o Minor bugfixes (correctness, on 0.2.2.x and earlier):
21739 - Exit nodes now correctly report EADDRINUSE and EADDRNOTAVAIL as
21740 resource exhaustion, so that clients can adjust their load to
21741 try other exits. Fixes bug 4710; bugfix on 0.1.0.1-rc, which
21742 started using END_STREAM_REASON_RESOURCELIMIT.
21743 - Don't check for whether the address we're using for outbound
21744 connections has changed until after the outbound connection has
21745 completed. On Windows, getsockname() doesn't succeed until the
21746 connection is finished. Fixes bug 5374; bugfix on 0.1.1.14-alpha.
21747 - If the configuration tries to set MyFamily on a bridge, refuse to
21748 do so, and warn about the security implications. Fixes bug 4657;
21749 bugfix on 0.2.0.3-alpha.
21750 - If the client fails to set a reasonable set of ciphersuites
21751 during its v2 handshake renegotiation, allow the renegotiation to
21752 continue nevertheless (i.e. send all the required certificates).
21753 Fixes bug 4591; bugfix on 0.2.0.20-rc.
21754 - When we receive a SIGHUP and the controller __ReloadTorrcOnSIGHUP
21755 option is set to 0 (which Vidalia version 0.2.16 now does when
21756 a SAVECONF attempt fails), perform other actions that SIGHUP
21757 usually causes (like reopening the logs). Fixes bug 5095; bugfix
21759 - If we fail to write a microdescriptor to the disk cache, do not
21760 continue replacing the old microdescriptor file. Fixes bug 2954;
21761 bugfix on 0.2.2.6-alpha.
21762 - Exit nodes don't need to fetch certificates for authorities that
21763 they don't recognize; only directory authorities, bridges,
21764 and caches need to do that. Fixes part of bug 2297; bugfix on
21766 - Correctly handle checking the permissions on the parent
21767 directory of a control socket in the root directory. Bug found
21768 by Esteban Manchado Velázquez. Fixes bug 5089; bugfix on Tor
21770 - When told to add a bridge with the same digest as a preexisting
21771 bridge but a different addr:port, change the addr:port as
21772 requested. Previously we would not notice the change. Fixes half
21773 of bug 5603; fix on 0.2.2.26-beta.
21774 - End AUTHCHALLENGE error messages (in the control protocol) with
21775 a CRLF. Fixes bug 5760; bugfix on 0.2.2.36 and 0.2.3.13-alpha.
21777 o Minor bugfixes (on 0.2.3.x):
21778 - Turn an assertion (that the number of handshakes received as a
21779 server is not < 1) into a warning. Fixes bug 4873; bugfix on
21781 - Format IPv4 addresses correctly in ADDRMAP events. (Previously,
21782 we had reversed them when the answer was cached.) Fixes bug
21783 5723; bugfix on 0.2.3.1-alpha.
21784 - Work correctly on Linux systems with accept4 support advertised in
21785 their headers, but without accept4 support in the kernel. Fix
21786 by murb. Fixes bug 5762; bugfix on 0.2.3.1-alpha.
21787 - When told to add a bridge with the same addr:port as a preexisting
21788 bridge but a different transport, change the transport as
21789 requested. Previously we would not notice the change. Fixes half
21790 of bug 5603; fix on 0.2.3.2-alpha.
21791 - Avoid a "double-reply" warning when replying to a SOCKS request
21792 with a parse error. Patch from Fabian Keil. Fixes bug 4108;
21793 bugfix on 0.2.3.4-alpha.
21794 - Fix a bug where a bridge authority crashes if it has seen no
21795 directory requests when it's time to write statistics to disk.
21796 Fixes bug 5891; bugfix on 0.2.3.6-alpha. Also fixes bug 5508 in
21798 - Don't try to open non-control listeners when DisableNetwork is set.
21799 Previously, we'd open all listeners, then immediately close them.
21800 Fixes bug 5604; bugfix on 0.2.3.9-alpha.
21801 - Don't abort the managed proxy protocol if the managed proxy
21802 sends us an unrecognized line; ignore it instead. Fixes bug
21803 5910; bugfix on 0.2.3.9-alpha.
21804 - Fix a compile warning in crypto.c when compiling with clang 3.1.
21805 Fixes bug 5969, bugfix on 0.2.3.9-alpha.
21806 - Fix a compilation issue on GNU Hurd, which doesn't have PATH_MAX.
21807 Fixes bug 5355; bugfix on 0.2.3.11-alpha.
21808 - Remove bogus definition of "_WIN32" from src/win32/orconfig.h, to
21809 unbreak the MSVC build. Fixes bug 5858; bugfix on 0.2.3.12-alpha.
21810 - Resolve numerous small warnings and build issues with MSVC. Resolves
21813 o Documentation fixes:
21814 - Improve the manual's documentation for the NT Service command-line
21815 options. Addresses ticket 3964.
21816 - Clarify SessionGroup documentation slightly; resolves ticket 5437.
21817 - Document the changes to the ORPort and DirPort options, and the
21818 fact that {OR/Dir}ListenAddress is now unnecessary (and
21819 therefore deprecated). Resolves ticket 5597.
21822 - Remove the torrc.bridge file: we don't use it for anything, and
21823 it had become badly desynchronized from torrc.sample. Resolves
21827 Changes in version 0.2.2.36 - 2012-05-24
21828 Tor 0.2.2.36 updates the addresses for two of the eight directory
21829 authorities, fixes some potential anonymity and security issues,
21830 and fixes several crash bugs.
21832 Tor 0.2.1.x has reached its end-of-life. Those Tor versions have many
21833 known flaws, and nobody should be using them. You should upgrade. If
21834 you're using a Linux or BSD and its packages are obsolete, stop using
21835 those packages and upgrade anyway.
21837 o Directory authority changes:
21838 - Change IP address for maatuska (v3 directory authority).
21839 - Change IP address for ides (v3 directory authority), and rename
21843 - When building or running with any version of OpenSSL earlier
21844 than 0.9.8s or 1.0.0f, disable SSLv3 support. These OpenSSL
21845 versions have a bug (CVE-2011-4576) in which their block cipher
21846 padding includes uninitialized data, potentially leaking sensitive
21847 information to any peer with whom they make a SSLv3 connection. Tor
21848 does not use SSL v3 by default, but a hostile client or server
21849 could force an SSLv3 connection in order to gain information that
21850 they shouldn't have been able to get. The best solution here is to
21851 upgrade to OpenSSL 0.9.8s or 1.0.0f (or later). But when building
21852 or running with a non-upgraded OpenSSL, we disable SSLv3 entirely
21853 to make sure that the bug can't happen.
21854 - Never use a bridge or a controller-supplied node as an exit, even
21855 if its exit policy allows it. Found by wanoskarnet. Fixes bug
21856 5342. Bugfix on 0.1.1.15-rc (for controller-purpose descriptors)
21857 and 0.2.0.3-alpha (for bridge-purpose descriptors).
21858 - Only build circuits if we have a sufficient threshold of the total
21859 descriptors that are marked in the consensus with the "Exit"
21860 flag. This mitigates an attack proposed by wanoskarnet, in which
21861 all of a client's bridges collude to restrict the exit nodes that
21862 the client knows about. Fixes bug 5343.
21863 - Provide controllers with a safer way to implement the cookie
21864 authentication mechanism. With the old method, if another locally
21865 running program could convince a controller that it was the Tor
21866 process, then that program could trick the controller into telling
21867 it the contents of an arbitrary 32-byte file. The new "SAFECOOKIE"
21868 authentication method uses a challenge-response approach to prevent
21869 this attack. Fixes bug 5185; implements proposal 193.
21872 - Avoid logging uninitialized data when unable to decode a hidden
21873 service descriptor cookie. Fixes bug 5647; bugfix on 0.2.1.5-alpha.
21874 - Avoid a client-side assertion failure when receiving an INTRODUCE2
21875 cell on a general purpose circuit. Fixes bug 5644; bugfix on
21877 - Fix builds when the path to sed, openssl, or sha1sum contains
21878 spaces, which is pretty common on Windows. Fixes bug 5065; bugfix
21880 - Correct our replacements for the timeradd() and timersub() functions
21881 on platforms that lack them (for example, Windows). The timersub()
21882 function is used when expiring circuits, while timeradd() is
21883 currently unused. Bug report and patch by Vektor. Fixes bug 4778;
21884 bugfix on 0.2.2.24-alpha.
21885 - Fix the SOCKET_OK test that we use to tell when socket
21886 creation fails so that it works on Win64. Fixes part of bug 4533;
21887 bugfix on 0.2.2.29-beta. Bug found by wanoskarnet.
21890 - Reject out-of-range times like 23:59:61 in parse_rfc1123_time().
21891 Fixes bug 5346; bugfix on 0.0.8pre3.
21892 - Make our number-parsing functions always treat too-large values
21893 as an error, even when those values exceed the width of the
21894 underlying type. Previously, if the caller provided these
21895 functions with minima or maxima set to the extreme values of the
21896 underlying integer type, these functions would return those
21897 values on overflow rather than treating overflow as an error.
21898 Fixes part of bug 5786; bugfix on 0.0.9.
21899 - Older Linux kernels erroneously respond to strange nmap behavior
21900 by having accept() return successfully with a zero-length
21901 socket. When this happens, just close the connection. Previously,
21902 we would try harder to learn the remote address: but there was
21903 no such remote address to learn, and our method for trying to
21904 learn it was incorrect. Fixes bugs 1240, 4745, and 4747. Bugfix
21905 on 0.1.0.3-rc. Reported and diagnosed by "r1eo".
21906 - Correct parsing of certain date types in parse_http_time().
21907 Without this patch, If-Modified-Since would behave
21908 incorrectly. Fixes bug 5346; bugfix on 0.2.0.2-alpha. Patch from
21909 Esteban Manchado Velázques.
21910 - Change the BridgePassword feature (part of the "bridge community"
21911 design, which is not yet implemented) to use a time-independent
21912 comparison. The old behavior might have allowed an adversary
21913 to use timing to guess the BridgePassword value. Fixes bug 5543;
21914 bugfix on 0.2.0.14-alpha.
21915 - Detect and reject certain misformed escape sequences in
21916 configuration values. Previously, these values would cause us
21917 to crash if received in a torrc file or over an authenticated
21918 control port. Bug found by Esteban Manchado Velázquez, and
21919 independently by Robert Connolly from Matta Consulting who further
21920 noted that it allows a post-authentication heap overflow. Patch
21921 by Alexander Schrijver. Fixes bugs 5090 and 5402 (CVE 2012-1668);
21922 bugfix on 0.2.0.16-alpha.
21923 - Fix a compile warning when using the --enable-openbsd-malloc
21924 configure option. Fixes bug 5340; bugfix on 0.2.0.20-rc.
21925 - During configure, detect when we're building with clang version
21926 3.0 or lower and disable the -Wnormalized=id and -Woverride-init
21927 CFLAGS. clang doesn't support them yet.
21928 - When sending an HTTP/1.1 proxy request, include a Host header.
21929 Fixes bug 5593; bugfix on 0.2.2.1-alpha.
21930 - Fix a NULL-pointer dereference on a badly formed SETCIRCUITPURPOSE
21931 command. Found by mikeyc. Fixes bug 5796; bugfix on 0.2.2.9-alpha.
21932 - If we hit the error case where routerlist_insert() replaces an
21933 existing (old) server descriptor, make sure to remove that
21934 server descriptor from the old_routers list. Fix related to bug
21935 1776. Bugfix on 0.2.2.18-alpha.
21937 o Minor bugfixes (documentation and log messages):
21938 - Fix a typo in a log message in rend_service_rendezvous_has_opened().
21939 Fixes bug 4856; bugfix on Tor 0.0.6.
21940 - Update "ClientOnly" man page entry to explain that there isn't
21941 really any point to messing with it. Resolves ticket 5005.
21942 - Document the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays
21943 directory authority option (introduced in Tor 0.2.2.34).
21944 - Downgrade the "We're missing a certificate" message from notice
21945 to info: people kept mistaking it for a real problem, whereas it
21946 is seldom the problem even when we are failing to bootstrap. Fixes
21947 bug 5067; bugfix on 0.2.0.10-alpha.
21948 - Correctly spell "connect" in a log message on failure to create a
21949 controlsocket. Fixes bug 4803; bugfix on 0.2.2.26-beta.
21950 - Clarify the behavior of MaxCircuitDirtiness with hidden service
21951 circuits. Fixes issue 5259.
21954 - Directory authorities now reject versions of Tor older than
21955 0.2.1.30, and Tor versions between 0.2.2.1-alpha and 0.2.2.20-alpha
21956 inclusive. These versions accounted for only a small fraction of
21957 the Tor network, and have numerous known security issues. Resolves
21959 - Update to the May 1 2012 Maxmind GeoLite Country database.
21962 - When sending or relaying a RELAY_EARLY cell, we used to convert
21963 it to a RELAY cell if the connection was using the v1 link
21964 protocol. This was a workaround for older versions of Tor, which
21965 didn't handle RELAY_EARLY cells properly. Now that all supported
21966 versions can handle RELAY_EARLY cells, and now that we're enforcing
21967 the "no RELAY_EXTEND commands except in RELAY_EARLY cells" rule,
21968 remove this workaround. Addresses bug 4786.
21971 Changes in version 0.2.3.15-alpha - 2012-04-30
21972 Tor 0.2.3.15-alpha fixes a variety of smaller bugs, including making
21973 the development branch build on Windows again.
21975 o Minor bugfixes (on 0.2.2.x and earlier):
21976 - Make sure that there are no unhandled pending TLS errors before
21977 reading from a TLS stream. We had checks in 0.1.0.3-rc, but
21978 lost them in 0.1.0.5-rc when we refactored read_to_buf_tls().
21979 Bugfix on 0.1.0.5-rc; fixes bug 4528.
21980 - Fix an assert that directory authorities could trigger on sighup
21981 during some configuration state transitions. We now don't treat
21982 it as a fatal error when the new descriptor we just generated in
21983 init_keys() isn't accepted. Fixes bug 4438; bugfix on 0.2.1.9-alpha.
21984 - After we pick a directory mirror, we would refuse to use it if
21985 it's in our ExcludeExitNodes list, resulting in mysterious failures
21986 to bootstrap for people who just wanted to avoid exiting from
21987 certain locations. Fixes bug 5623; bugfix on 0.2.2.25-alpha.
21988 - When building with --enable-static-tor on OpenBSD, do not
21989 erroneously attempt to link -lrt. Fixes bug 5103.
21991 o Minor bugfixes (on 0.2.3.x):
21992 - When Tor is built with kernel headers from a recent (last few
21993 years) Linux kernel, do not fail to run on older (pre-2.6.28
21994 Linux kernels). Fixes bug 5112; bugfix on 0.2.3.1-alpha.
21995 - Fix cross-compilation issues with mingw. Bugfixes on 0.2.3.6-alpha
21996 and 0.2.3.12-alpha.
21997 - Fix compilation with miniupnpc version 1.6; patch from
21998 Anthony G. Basile. Fixes bug 5434; bugfix on 0.2.3.12-alpha.
21999 - Fix compilation with MSVC, which had defined MS_WINDOWS. Bugfix
22000 on 0.2.3.13-alpha; found and fixed by Gisle Vanem.
22001 - Fix compilation on platforms without unistd.h, or where environ
22002 is defined in stdlib.h. Fixes bug 5704; bugfix on 0.2.3.13-alpha.
22005 - Directory authorities are now a little more lenient at accepting
22006 older router descriptors, or newer router descriptors that don't
22007 make big changes. This should help ameliorate past and future
22008 issues where routers think they have uploaded valid descriptors,
22009 but the authorities don't think so. Fix for ticket 2479.
22010 - Make the code that clients use to detect an address change be
22011 IPv6-aware, so that it won't fill clients' logs with error
22012 messages when trying to get the IPv4 address of an IPv6
22013 connection. Implements ticket 5537.
22015 o Removed features:
22016 - Remove the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays option;
22017 authorities needed to use it for a while to keep the network working
22018 as people upgraded to 0.2.1.31, 0.2.2.34, or 0.2.3.6-alpha, but
22019 that was six months ago. As of now, it should no longer be needed
22023 Changes in version 0.2.3.14-alpha - 2012-04-23
22024 Tor 0.2.3.14-alpha fixes yet more bugs to get us closer to a release
22025 candidate. It also dramatically speeds up AES: fast relays should
22026 consider switching to the newer OpenSSL library.
22028 o Directory authority changes:
22029 - Change IP address for ides (v3 directory authority), and rename
22033 - Avoid logging uninitialized data when unable to decode a hidden
22034 service descriptor cookie. Fixes bug 5647; bugfix on 0.2.1.5-alpha.
22035 - Avoid a client-side assertion failure when receiving an INTRODUCE2
22036 cell on a general purpose circuit. Fixes bug 5644; bugfix on
22038 - If authorities are unable to get a v2 consensus document from other
22039 directory authorities, they no longer fall back to fetching
22040 them from regular directory caches. Fixes bug 5635; bugfix on
22041 0.2.2.26-beta, where routers stopped downloading v2 consensus
22042 documents entirely.
22043 - When we start a Tor client with a normal consensus already cached,
22044 be willing to download a microdescriptor consensus. Fixes bug 4011;
22045 fix on 0.2.3.1-alpha.
22047 o Major features (performance):
22048 - When built to use OpenSSL 1.0.1, and built for an x86 or x86_64
22049 instruction set, take advantage of OpenSSL's AESNI, bitsliced, or
22050 vectorized AES implementations as appropriate. These can be much,
22051 much faster than other AES implementations.
22053 o Minor bugfixes (0.2.2.x and earlier):
22054 - Don't launch more than 10 service-side introduction-point circuits
22055 for a hidden service in five minutes. Previously, we would consider
22056 launching more introduction-point circuits if at least one second
22057 had passed without any introduction-point circuits failing. Fixes
22058 bug 4607; bugfix on 0.0.7pre1.
22059 - Change the BridgePassword feature (part of the "bridge community"
22060 design, which is not yet implemented) to use a time-independent
22061 comparison. The old behavior might have allowed an adversary
22062 to use timing to guess the BridgePassword value. Fixes bug 5543;
22063 bugfix on 0.2.0.14-alpha.
22064 - Enforce correct return behavior of tor_vsscanf() when the '%%'
22065 pattern is used. Fixes bug 5558. Bugfix on 0.2.1.13.
22066 - When sending an HTTP/1.1 proxy request, include a Host header.
22067 Fixes bug 5593; bugfix on 0.2.2.1-alpha.
22068 - Don't log that we have "decided to publish new relay descriptor"
22069 unless we are actually publishing a descriptor. Fixes bug 3942;
22070 bugfix on 0.2.2.28-beta.
22072 o Minor bugfixes (0.2.3.x):
22073 - Fix a bug where a bridge authority crashes (on a failed assert)
22074 if it has seen no directory requests when it's time to write
22075 statistics to disk. Fixes bug 5508. Bugfix on 0.2.3.6-alpha.
22076 - Fix bug stomping on ORPort option NoListen and ignoring option
22077 NoAdvertise. Fixes bug 5151; bugfix on 0.2.3.9-alpha.
22078 - In the testsuite, provide a large enough buffer in the tor_sscanf
22079 unit test. Otherwise we'd overrun that buffer and crash during
22080 the unit tests. Found by weasel. Fixes bug 5449; bugfix on
22082 - Make sure we create the keys directory if it doesn't exist and we're
22083 about to store the dynamic Diffie-Hellman parameters. Fixes bug
22084 5572; bugfix on 0.2.3.13-alpha.
22085 - Fix a small memory leak when trying to decode incorrect base16
22086 authenticator during SAFECOOKIE authentication. Found by
22087 Coverity Scan. Fixes CID 507. Bugfix on 0.2.3.13-alpha.
22090 - Add more information to a log statement that might help track down
22091 bug 4091. If you're seeing "Bug: tor_addr_is_internal() called with a
22092 non-IP address" messages (or any Bug messages, for that matter!),
22093 please let us know about it.
22094 - Relays now understand an IPv6 address when they get one from a
22095 directory server. Resolves ticket 4875.
22096 - Resolve IPv6 addresses in bridge and entry statistics to country
22097 code "??" which means we at least count them. Resolves ticket 5053;
22098 improves on 0.2.3.9-alpha.
22099 - Update to the April 3 2012 Maxmind GeoLite Country database.
22100 - Begin a doc/state-contents.txt file to explain the contents of
22101 the Tor state file. Fixes bug 2987.
22103 o Default torrc changes:
22104 - Stop listing "socksport 9050" in torrc.sample. We open a socks
22105 port on 9050 by default anyway, so this should not change anything
22107 - Stop mentioning the deprecated *ListenAddress options in
22108 torrc.sample. Fixes bug 5438.
22109 - Document unit of bandwidth related options in sample torrc.
22112 o Removed features:
22113 - The "torify" script no longer supports the "tsocks" socksifier
22114 tool, since tsocks doesn't support DNS and UDP right for Tor.
22115 Everyone should be using torsocks instead. Fixes bugs 3530 and
22116 5180. Based on a patch by "ugh".
22118 o Code refactoring:
22119 - Change the symmetric cipher interface so that creating and
22120 initializing a stream cipher are no longer separate functions.
22121 - Remove all internal support for unpadded RSA. We never used it, and
22122 it would be a bad idea to start.
22125 Changes in version 0.2.3.13-alpha - 2012-03-26
22126 Tor 0.2.3.13-alpha fixes a variety of stability and correctness bugs
22127 in managed pluggable transports, as well as providing other cleanups
22128 that get us closer to a release candidate.
22130 o Directory authority changes:
22131 - Change IP address for maatuska (v3 directory authority).
22134 - Provide controllers with a safer way to implement the cookie
22135 authentication mechanism. With the old method, if another locally
22136 running program could convince a controller that it was the Tor
22137 process, then that program could trick the controller into telling
22138 it the contents of an arbitrary 32-byte file. The new "SAFECOOKIE"
22139 authentication method uses a challenge-response approach to prevent
22140 this attack. Fixes bug 5185, implements proposal 193.
22141 - Never use a bridge or a controller-supplied node as an exit, even
22142 if its exit policy allows it. Found by wanoskarnet. Fixes bug
22143 5342. Bugfix on 0.1.1.15-rc (for controller-purpose descriptors)
22144 and 0.2.0.3-alpha (for bridge-purpose descriptors).
22145 - Only build circuits if we have a sufficient threshold of the total
22146 descriptors that are marked in the consensus with the "Exit"
22147 flag. This mitigates an attack proposed by wanoskarnet, in which
22148 all of a client's bridges collude to restrict the exit nodes that
22149 the client knows about. Fixes bug 5343.
22151 o Major bugfixes (on Tor 0.2.3.x):
22152 - Avoid an assert when managed proxies like obfsproxy are configured,
22153 and we receive HUP signals or setconf attempts too rapidly. This
22154 situation happens most commonly when Vidalia tries to attach to
22155 Tor or tries to configure the Tor it's attached to. Fixes bug 5084;
22156 bugfix on 0.2.3.6-alpha.
22157 - Fix a relay-side pluggable transports bug where managed proxies were
22158 unreachable from the Internet, because Tor asked them to bind on
22159 localhost. Fixes bug 4725; bugfix on 0.2.3.9-alpha.
22160 - Stop discarding command-line arguments when TestingTorNetwork
22161 is set. Discovered by Kevin Bauer. Fixes bug 5373; bugfix on
22162 0.2.3.9-alpha, where task 4552 added support for two layers of
22164 - Resume allowing the unit tests to run in gdb. This was accidentally
22165 made impossible when the DisableDebuggerAttachment option was
22166 introduced. Fixes bug 5448; bugfix on 0.2.3.9-alpha.
22167 - Resume building with nat-pmp support. Fixes bug 4955; bugfix on
22168 0.2.3.11-alpha. Reported by Anthony G. Basile.
22170 o Minor bugfixes (on 0.2.2.x and earlier):
22171 - Ensure we don't cannibalize circuits that are longer than three hops
22172 already, so we don't end up making circuits with 5 or more
22173 hops. Patch contributed by wanoskarnet. Fixes bug 5231; bugfix on
22174 0.1.0.1-rc which introduced cannibalization.
22175 - Detect and reject certain misformed escape sequences in
22176 configuration values. Previously, these values would cause us
22177 to crash if received in a torrc file or over an authenticated
22178 control port. Bug found by Esteban Manchado Velázquez, and
22179 independently by Robert Connolly from Matta Consulting who further
22180 noted that it allows a post-authentication heap overflow. Patch
22181 by Alexander Schrijver. Fixes bugs 5090 and 5402 (CVE 2012-1668);
22182 bugfix on 0.2.0.16-alpha.
22183 - Fix a compile warning when using the --enable-openbsd-malloc
22184 configure option. Fixes bug 5340; bugfix on 0.2.0.20-rc.
22185 - Directory caches no longer refuse to clean out descriptors because
22186 of missing v2 networkstatus documents, unless they're configured
22187 to retrieve v2 networkstatus documents. Fixes bug 4838; bugfix on
22188 0.2.2.26-beta. Patch by Daniel Bryg.
22189 - Update to the latest version of the tinytest unit testing framework.
22190 This includes a couple of bugfixes that can be relevant for
22191 running forked unit tests on Windows, and removes all reserved
22194 o Minor bugfixes (on 0.2.3.x):
22195 - On a failed pipe() call, don't leak file descriptors. Fixes bug
22196 4296; bugfix on 0.2.3.1-alpha.
22197 - Spec conformance: on a v3 handshake, do not send a NETINFO cell
22198 until after we have received a CERTS cell. Fixes bug 4361; bugfix
22199 on 0.2.3.6-alpha. Patch by "frosty".
22200 - When binding to an IPv6 address, set the IPV6_V6ONLY socket
22201 option, so that the IP stack doesn't decide to use it for IPv4
22202 too. Fixes bug 4760; bugfix on 0.2.3.9-alpha.
22203 - Ensure that variables set in Tor's environment cannot override
22204 environment variables that Tor passes to a managed
22205 pluggable-transport proxy. Previously, Tor would pass every
22206 variable in its environment to managed proxies along with the new
22207 ones, in such a way that on many operating systems, the inherited
22208 environment variables would override those which Tor tried to
22209 explicitly set. Bugfix on 0.2.3.12-alpha for most Unixoid systems;
22210 bugfix on 0.2.3.9-alpha for Windows.
22213 - A wide variety of new unit tests by Esteban Manchado Velázquez.
22214 - Shorten links in the tor-exit-notice file. Patch by Christian Kujau.
22215 - Update to the March 6 2012 Maxmind GeoLite Country database.
22218 Changes in version 0.2.3.12-alpha - 2012-02-13
22219 Tor 0.2.3.12-alpha lets fast exit relays scale better, allows clients
22220 to use bridges that run Tor 0.2.2.x, and resolves several big bugs
22221 when Tor is configured to use a pluggable transport like obfsproxy.
22224 - Fix builds when the path to sed, openssl, or sha1sum contains
22225 spaces, which is pretty common on Windows. Fixes bug 5065; bugfix
22227 - Set the SO_REUSEADDR socket option before we call bind() on outgoing
22228 connections. This change should allow busy exit relays to stop
22229 running out of available sockets as quickly. Fixes bug 4950;
22230 bugfix on 0.2.2.26-beta.
22231 - Allow 0.2.3.x clients to use 0.2.2.x bridges. Previously the client
22232 would ask the bridge for microdescriptors, which are only supported
22233 in 0.2.3.x, and then fail to bootstrap when it didn't get the
22234 answers it wanted. Fixes bug 4013; bugfix on 0.2.3.2-alpha.
22235 - Properly set up obfsproxy's environment when in managed mode. The
22236 Tor Browser Bundle needs LD_LIBRARY_PATH to be passed to obfsproxy,
22237 and when you run your Tor as a daemon, there's no HOME. Fixes bugs
22238 5076 and 5082; bugfix on 0.2.3.6-alpha.
22241 - Use the dead_strip option when building Tor on OS X. This reduces
22242 binary size by almost 19% when linking openssl and libevent
22243 statically, which we do for Tor Browser Bundle.
22244 - Fix broken URLs in the sample torrc file, and tell readers about
22245 the OutboundBindAddress, ExitPolicyRejectPrivate, and
22246 PublishServerDescriptor options. Addresses bug 4652.
22247 - Update to the February 7 2012 Maxmind GeoLite Country database.
22250 - Downgrade the "We're missing a certificate" message from notice
22251 to info: people kept mistaking it for a real problem, whereas it
22252 is seldom the problem even when we are failing to bootstrap. Fixes
22253 bug 5067; bugfix on 0.2.0.10-alpha.
22254 - Don't put "TOR_PT_EXTENDED_SERVER_PORT=127.0.0.1:4200" in a
22255 managed pluggable transport server proxy's environment.
22256 Previously, we would put it there, even though Tor doesn't
22257 implement an 'extended server port' yet, and even though Tor
22258 almost certainly isn't listening at that address. For now, we set
22259 it to an empty string to avoid crashing older obfsproxies. Bugfix
22261 - Log the heartbeat message every HeartbeatPeriod seconds, not every
22262 HeartbeatPeriod + 1 seconds. Fixes bug 4942; bugfix on
22263 0.2.3.1-alpha. Bug reported by Scott Bennett.
22264 - Calculate absolute paths correctly on Windows. Fixes bug 4973;
22265 bugfix on 0.2.3.11-alpha.
22266 - Update "ClientOnly" man page entry to explain that there isn't
22267 really any point to messing with it. Resolves ticket 5005.
22268 - Use the correct CVE number for CVE-2011-4576 in our comments and
22269 log messages. Found by "fermenthor". Resolves bug 5066; bugfix on
22272 o Code simplifications and refactoring:
22273 - Use the _WIN32 macro throughout our code to detect Windows.
22274 (Previously we had used the obsolete 'WIN32' and the idiosyncratic
22278 Changes in version 0.2.3.11-alpha - 2012-01-22
22279 Tor 0.2.3.11-alpha marks feature-freeze for the 0.2.3 tree. It deploys
22280 the last step of the plan to limit maximum circuit length, includes
22281 a wide variety of hidden service performance and correctness fixes,
22282 works around an OpenSSL security flaw if your distro is too stubborn
22283 to upgrade, and fixes a bunch of smaller issues.
22286 - Now that Tor 0.2.0.x is completely deprecated, enable the final
22287 part of "Proposal 110: Avoiding infinite length circuits" by
22288 refusing all circuit-extend requests that do not use a relay_early
22289 cell. This change helps Tor resist a class of denial-of-service
22290 attacks by limiting the maximum circuit length.
22291 - Adjust the number of introduction points that a hidden service
22292 will try to maintain based on how long its introduction points
22293 remain in use and how many introductions they handle. Fixes
22295 - Try to use system facilities for enumerating local interface
22296 addresses, before falling back to our old approach (which was
22297 binding a UDP socket, and calling getsockname() on it). That
22298 approach was scaring OS X users whose draconian firewall
22299 software warned about binding to UDP sockets, regardless of
22300 whether packets were sent. Now we try to use getifaddrs(),
22301 SIOCGIFCONF, or GetAdaptersAddresses(), depending on what the
22302 system supports. Resolves ticket 1827.
22304 o Major security workaround:
22305 - When building or running with any version of OpenSSL earlier
22306 than 0.9.8s or 1.0.0f, disable SSLv3 support. These OpenSSL
22307 versions have a bug (CVE-2011-4576) in which their block cipher
22308 padding includes uninitialized data, potentially leaking sensitive
22309 information to any peer with whom they make a SSLv3 connection. Tor
22310 does not use SSL v3 by default, but a hostile client or server
22311 could force an SSLv3 connection in order to gain information that
22312 they shouldn't have been able to get. The best solution here is to
22313 upgrade to OpenSSL 0.9.8s or 1.0.0f (or later). But when building
22314 or running with a non-upgraded OpenSSL, we disable SSLv3 entirely
22315 to make sure that the bug can't happen.
22318 - Fix the SOCKET_OK test that we use to tell when socket
22319 creation fails so that it works on Win64. Fixes part of bug 4533;
22320 bugfix on 0.2.2.29-beta. Bug found by wanoskarnet.
22321 - Correct our replacements for the timeradd() and timersub() functions
22322 on platforms that lack them (for example, Windows). The timersub()
22323 function is used when expiring circuits, while timeradd() is
22324 currently unused. Bug report and patch by Vektor. Fixes bug 4778;
22325 bugfix on 0.2.2.24-alpha and 0.2.3.1-alpha.
22326 - Do not use OpenSSL 1.0.0's counter mode: it has a critical bug
22327 that was fixed in OpenSSL 1.0.0a. We test for the counter mode
22328 bug at runtime, not compile time, because some distributions hack
22329 their OpenSSL to mis-report its version. Fixes bug 4779; bugfix
22330 on 0.2.3.9-alpha. Found by Pascal.
22332 o Minor features (controller):
22333 - Use absolute path names when reporting the torrc filename in the
22334 control protocol, so a controller can more easily find the torrc
22335 file. Resolves bug 1101.
22336 - Extend the control protocol to report flags that control a circuit's
22337 path selection in CIRC events and in replies to 'GETINFO
22338 circuit-status'. Implements part of ticket 2411.
22339 - Extend the control protocol to report the hidden service address
22340 and current state of a hidden-service-related circuit in CIRC
22341 events and in replies to 'GETINFO circuit-status'. Implements part
22343 - When reporting the path to the cookie file to the controller,
22344 give an absolute path. Resolves ticket 4881.
22345 - Allow controllers to request an event notification whenever a
22346 circuit is cannibalized or its purpose is changed. Implements
22347 part of ticket 3457.
22348 - Include the creation time of a circuit in CIRC and CIRC2
22349 control-port events and the list produced by the 'GETINFO
22350 circuit-status' control-port command.
22352 o Minor features (directory authorities):
22353 - Directory authorities now reject versions of Tor older than
22354 0.2.1.30, and Tor versions between 0.2.2.1-alpha and 0.2.2.20-alpha
22355 inclusive. These versions accounted for only a small fraction of
22356 the Tor network, and have numerous known security issues. Resolves
22358 - Authority operators can now vote for all relays in a given
22359 set of countries to be BadDir/BadExit/Invalid/Rejected.
22360 - Provide two consensus parameters (FastFlagMinThreshold and
22361 FastFlagMaxThreshold) to control the range of allowable bandwidths
22362 for the Fast directory flag. These allow authorities to run
22363 experiments on appropriate requirements for being a "Fast" node.
22364 The AuthDirFastGuarantee config value still applies. Implements
22366 - Document the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays
22367 directory authority option (introduced in Tor 0.2.2.34).
22369 o Minor features (other):
22370 - Don't disable the DirPort when we cannot exceed our AccountingMax
22371 limit during this interval because the effective bandwidthrate is
22372 low enough. This is useful in a situation where AccountMax is only
22373 used as an additional safeguard or to provide statistics.
22374 - Prepend an informative header to generated dynamic_dh_params files.
22375 - If EntryNodes are given, but UseEntryGuards is set to 0, warn that
22376 EntryNodes will have no effect. Resolves issue 2571.
22377 - Log more useful messages when we fail to disable debugger
22379 - Log which authority we're missing votes from when we go to fetch
22380 them from the other auths.
22381 - Log (at debug level) whenever a circuit's purpose is changed.
22382 - Add missing documentation for the MaxClientCircuitsPending,
22383 UseMicrodescriptors, UserspaceIOCPBuffers, and
22384 _UseFilteringSSLBufferevents options, all introduced during
22385 the 0.2.3.x series.
22386 - Update to the January 3 2012 Maxmind GeoLite Country database.
22388 o Minor bugfixes (hidden services):
22389 - Don't close hidden service client circuits which have almost
22390 finished connecting to their destination when they reach
22391 the normal circuit-build timeout. Previously, we would close
22392 introduction circuits which are waiting for an acknowledgement
22393 from the introduction point, and rendezvous circuits which have
22394 been specified in an INTRODUCE1 cell sent to a hidden service,
22395 after the normal CBT. Now, we mark them as 'timed out', and launch
22396 another rendezvous attempt in parallel. This behavior change can
22397 be disabled using the new CloseHSClientCircuitsImmediatelyOnTimeout
22398 option. Fixes part of bug 1297; bugfix on 0.2.2.2-alpha.
22399 - Don't close hidden-service-side rendezvous circuits when they
22400 reach the normal circuit-build timeout. This behavior change can
22401 be disabled using the new
22402 CloseHSServiceRendCircuitsImmediatelyOnTimeout option. Fixes the
22403 remaining part of bug 1297; bugfix on 0.2.2.2-alpha.
22404 - Make sure we never mark the wrong rendezvous circuit as having
22405 had its introduction cell acknowledged by the introduction-point
22406 relay. Previously, when we received an INTRODUCE_ACK cell on a
22407 client-side hidden-service introduction circuit, we might have
22408 marked a rendezvous circuit other than the one we specified in
22409 the INTRODUCE1 cell as INTRO_ACKED, which would have produced
22410 a warning message and interfered with the hidden service
22411 connection-establishment process. Fixes bug 4759; bugfix on
22412 0.2.3.3-alpha, when we added the stream-isolation feature which
22413 might cause Tor to open multiple rendezvous circuits for the same
22415 - Don't trigger an assertion failure when we mark a new client-side
22416 hidden-service introduction circuit for close during the process
22417 of creating it. Fixes bug 4796; bugfix on 0.2.3.6-alpha. Reported
22420 o Minor bugfixes (log messages):
22421 - Correctly spell "connect" in a log message on failure to create a
22422 controlsocket. Fixes bug 4803; bugfix on 0.2.2.26-beta and
22424 - Fix a typo in a log message in rend_service_rendezvous_has_opened().
22425 Fixes bug 4856; bugfix on Tor 0.0.6.
22426 - Fix the log message describing how we work around discovering
22427 that our version is the ill-fated OpenSSL 0.9.8l. Fixes bug
22428 4837; bugfix on 0.2.2.9-alpha.
22429 - When logging about a disallowed .exit name, do not also call it
22430 an "invalid onion address". Fixes bug 3325; bugfix on 0.2.2.9-alpha.
22432 o Minor bugfixes (build fixes):
22433 - During configure, detect when we're building with clang version
22434 3.0 or lower and disable the -Wnormalized=id and -Woverride-init
22435 CFLAGS. clang doesn't support them yet.
22436 - During configure, search for library containing cos function as
22437 libm lives in libcore on some platforms (BeOS/Haiku). Linking
22438 against libm was hard-coded before. Fixes the first part of bug
22439 4727; bugfix on 0.2.2.2-alpha. Patch and analysis by Martin Hebnes
22441 - Detect attempts to build Tor on (as yet hypothetical) versions
22442 of Windows where sizeof(intptr_t) != sizeof(SOCKET). Partial
22443 fix for bug 4533. Bugfix on 0.2.2.28-beta.
22444 - Preprocessor directives should not be put inside the arguments
22445 of a macro. This would break compilation with GCC releases prior
22446 to version 3.3. We would never recommend such an old GCC version,
22447 but it is apparently required for binary compatibility on some
22448 platforms (namely, certain builds of Haiku). Fixes the other part
22449 of bug 4727; bugfix on 0.2.3.3-alpha. Patch and analysis by Martin
22452 o Minor bugfixes (other):
22453 - Older Linux kernels erroneously respond to strange nmap behavior
22454 by having accept() return successfully with a zero-length
22455 socket. When this happens, just close the connection. Previously,
22456 we would try harder to learn the remote address: but there was
22457 no such remote address to learn, and our method for trying to
22458 learn it was incorrect. Fixes bugs 1240, 4745, and 4747. Bugfix
22459 on 0.1.0.3-rc. Reported and diagnosed by "r1eo".
22460 - Fix null-pointer access that could occur if TLS allocation failed.
22461 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un". This was
22462 erroneously listed as fixed in 0.2.3.9-alpha, but the fix had
22463 accidentally been reverted.
22464 - Fix our implementation of crypto_random_hostname() so it can't
22465 overflow on ridiculously large inputs. (No Tor version has ever
22466 provided this kind of bad inputs, but let's be correct in depth.)
22467 Fixes bug 4413; bugfix on 0.2.2.9-alpha. Fix by Stephen Palmateer.
22468 - Find more places in the code that should have been testing for
22469 invalid sockets using the SOCKET_OK macro. Required for a fix
22470 for bug 4533. Bugfix on 0.2.2.28-beta.
22471 - Fix an assertion failure when, while running with bufferevents, a
22472 connection finishes connecting after it is marked for close, but
22473 before it is closed. Fixes bug 4697; bugfix on 0.2.3.1-alpha.
22474 - test_util_spawn_background_ok() hardcoded the expected value
22475 for ENOENT to 2. This isn't portable as error numbers are
22476 platform specific, and particularly the hurd has ENOENT at
22477 0x40000002. Construct expected string at runtime, using the correct
22478 value for ENOENT. Fixes bug 4733; bugfix on 0.2.3.1-alpha.
22479 - Reject attempts to disable DisableDebuggerAttachment while Tor is
22480 running. Fixes bug 4650; bugfix on 0.2.3.9-alpha.
22481 - Use an appropriate-width type for sockets in tor-fw-helper on
22482 win64. Fixes bug 1983 at last. Bugfix on 0.2.3.9-alpha.
22485 - When sending or relaying a RELAY_EARLY cell, we used to convert
22486 it to a RELAY cell if the connection was using the v1 link
22487 protocol. This was a workaround for older versions of Tor, which
22488 didn't handle RELAY_EARLY cells properly. Now that all supported
22489 versions can handle RELAY_EARLY cells, and now that we're enforcing
22490 the "no RELAY_EXTEND commands except in RELAY_EARLY cells" rule,
22491 remove this workaround. Addresses bug 4786.
22493 o Code simplifications and refactoring:
22494 - Use OpenSSL's built-in SSL_state_string_long() instead of our
22495 own homebrewed ssl_state_to_string() replacement. Patch from
22496 Emile Snyder. Fixes bug 4653.
22497 - Use macros to indicate OpenSSL versions, so we don't need to worry
22498 about accidental hexadecimal bit shifts.
22499 - Remove some workaround code for OpenSSL 0.9.6 (which is no longer
22501 - Convert more instances of tor_snprintf+tor_strdup into tor_asprintf.
22502 - Use the smartlist_add_asprintf() alias more consistently.
22503 - Use a TOR_INVALID_SOCKET macro when initializing a socket to an
22504 invalid value, rather than just -1.
22505 - Rename a handful of old identifiers, mostly related to crypto
22506 structures and crypto functions. By convention, our "create an
22507 object" functions are called "type_new()", our "free an object"
22508 functions are called "type_free()", and our types indicate that
22509 they are types only with a final "_t". But a handful of older
22510 types and functions broke these rules, with function names like
22511 "type_create" or "subsystem_op_type", or with type names like
22515 Changes in version 0.2.3.10-alpha - 2011-12-16
22516 Tor 0.2.3.10-alpha fixes a critical heap-overflow security issue in
22517 Tor's buffers code. Absolutely everybody should upgrade.
22519 The bug relied on an incorrect calculation when making data continuous
22520 in one of our IO buffers, if the first chunk of the buffer was
22521 misaligned by just the wrong amount. The miscalculation would allow an
22522 attacker to overflow a piece of heap-allocated memory. To mount this
22523 attack, the attacker would need to either open a SOCKS connection to
22524 Tor's SocksPort (usually restricted to localhost), or target a Tor
22525 instance configured to make its connections through a SOCKS proxy
22526 (which Tor does not do by default).
22528 Good security practice requires that all heap-overflow bugs should be
22529 presumed to be exploitable until proven otherwise, so we are treating
22530 this as a potential code execution attack. Please upgrade immediately!
22531 This bug does not affect bufferevents-based builds of Tor. Special
22532 thanks to "Vektor" for reporting this issue to us!
22534 This release also contains a few minor bugfixes for issues discovered
22538 - Fix a heap overflow bug that could occur when trying to pull
22539 data into the first chunk of a buffer, when that chunk had
22540 already had some data drained from it. Fixes CVE-2011-2778;
22541 bugfix on 0.2.0.16-alpha. Reported by "Vektor".
22544 - If we can't attach streams to a rendezvous circuit when we
22545 finish connecting to a hidden service, clear the rendezvous
22546 circuit's stream-isolation state and try to attach streams
22547 again. Previously, we cleared rendezvous circuits' isolation
22548 state either too early (if they were freshly built) or not at all
22549 (if they had been built earlier and were cannibalized). Bugfix on
22550 0.2.3.3-alpha; fixes bug 4655.
22551 - Fix compilation of the libnatpmp helper on non-Windows. Bugfix on
22552 0.2.3.9-alpha; fixes bug 4691. Reported by Anthony G. Basile.
22553 - Fix an assertion failure when a relay with accounting enabled
22554 starts up while dormant. Fixes bug 4702; bugfix on 0.2.3.9-alpha.
22557 - Update to the December 6 2011 Maxmind GeoLite Country database.
22560 Changes in version 0.2.2.35 - 2011-12-16
22561 Tor 0.2.2.35 fixes a critical heap-overflow security issue in Tor's
22562 buffers code. Absolutely everybody should upgrade.
22564 The bug relied on an incorrect calculation when making data continuous
22565 in one of our IO buffers, if the first chunk of the buffer was
22566 misaligned by just the wrong amount. The miscalculation would allow an
22567 attacker to overflow a piece of heap-allocated memory. To mount this
22568 attack, the attacker would need to either open a SOCKS connection to
22569 Tor's SocksPort (usually restricted to localhost), or target a Tor
22570 instance configured to make its connections through a SOCKS proxy
22571 (which Tor does not do by default).
22573 Good security practice requires that all heap-overflow bugs should be
22574 presumed to be exploitable until proven otherwise, so we are treating
22575 this as a potential code execution attack. Please upgrade immediately!
22576 This bug does not affect bufferevents-based builds of Tor. Special
22577 thanks to "Vektor" for reporting this issue to us!
22579 Tor 0.2.2.35 also fixes several bugs in previous versions, including
22580 crash bugs for unusual configurations, and a long-term bug that
22581 would prevent Tor from starting on Windows machines with draconian
22584 With this release, we remind everyone that 0.2.0.x has reached its
22585 formal end-of-life. Those Tor versions have many known flaws, and
22586 nobody should be using them. You should upgrade -- ideally to the
22587 0.2.2.x series. If you're using a Linux or BSD and its packages are
22588 obsolete, stop using those packages and upgrade anyway.
22590 The Tor 0.2.1.x series is also approaching its end-of-life: it will no
22591 longer receive support after some time in early 2012.
22594 - Fix a heap overflow bug that could occur when trying to pull
22595 data into the first chunk of a buffer, when that chunk had
22596 already had some data drained from it. Fixes CVE-2011-2778;
22597 bugfix on 0.2.0.16-alpha. Reported by "Vektor".
22598 - Initialize Libevent with the EVENT_BASE_FLAG_NOLOCK flag enabled, so
22599 that it doesn't attempt to allocate a socketpair. This could cause
22600 some problems on Windows systems with overzealous firewalls. Fix for
22601 bug 4457; workaround for Libevent versions 2.0.1-alpha through
22603 - If we mark an OR connection for close based on a cell we process,
22604 don't process any further cells on it. We already avoid further
22605 reads on marked-for-close connections, but now we also discard the
22606 cells we'd already read. Fixes bug 4299; bugfix on 0.2.0.10-alpha,
22607 which was the first version where we might mark a connection for
22608 close based on processing a cell on it.
22609 - Correctly sanity-check that we don't underflow on a memory
22610 allocation (and then assert) for hidden service introduction
22611 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
22612 bugfix on 0.2.1.5-alpha.
22613 - Fix a memory leak when we check whether a hidden service
22614 descriptor has any usable introduction points left. Fixes bug
22615 4424. Bugfix on 0.2.2.25-alpha.
22616 - Don't crash when we're running as a relay and don't have a GeoIP
22617 file. Bugfix on 0.2.2.34; fixes bug 4340. This backports a fix
22618 we've had in the 0.2.3.x branch already.
22619 - When running as a client, do not print a misleading (and plain
22620 wrong) log message that we're collecting "directory request"
22621 statistics: clients don't collect statistics. Also don't create a
22622 useless (because empty) stats file in the stats/ directory. Fixes
22623 bug 4353; bugfix on 0.2.2.34.
22626 - Detect failure to initialize Libevent. This fix provides better
22627 detection for future instances of bug 4457.
22628 - Avoid frequent calls to the fairly expensive cull_wedged_cpuworkers
22629 function. This was eating up hideously large amounts of time on some
22630 busy servers. Fixes bug 4518; bugfix on 0.0.9.8.
22631 - Resolve an integer overflow bug in smartlist_ensure_capacity().
22632 Fixes bug 4230; bugfix on Tor 0.1.0.1-rc. Based on a patch by
22634 - Don't warn about unused log_mutex in log.c when building with
22635 --disable-threads using a recent GCC. Fixes bug 4437; bugfix on
22636 0.1.0.6-rc which introduced --disable-threads.
22637 - When configuring, starting, or stopping an NT service, stop
22638 immediately after the service configuration attempt has succeeded
22639 or failed. Fixes bug 3963; bugfix on 0.2.0.7-alpha.
22640 - When sending a NETINFO cell, include the original address
22641 received for the other side, not its canonical address. Found
22642 by "troll_un"; fixes bug 4349; bugfix on 0.2.0.10-alpha.
22643 - Fix a typo in a hibernation-related log message. Fixes bug 4331;
22644 bugfix on 0.2.2.23-alpha; found by "tmpname0901".
22645 - Fix a memory leak in launch_direct_bridge_descriptor_fetch() that
22646 occurred when a client tried to fetch a descriptor for a bridge
22647 in ExcludeNodes. Fixes bug 4383; bugfix on 0.2.2.25-alpha.
22648 - Backport fixes for a pair of compilation warnings on Windows.
22649 Fixes bug 4521; bugfix on 0.2.2.28-beta and on 0.2.2.29-beta.
22650 - If we had ever tried to call tor_addr_to_str on an address of
22651 unknown type, we would have done a strdup on an uninitialized
22652 buffer. Now we won't. Fixes bug 4529; bugfix on 0.2.1.3-alpha.
22653 Reported by "troll_un".
22654 - Correctly detect and handle transient lookup failures from
22655 tor_addr_lookup. Fixes bug 4530; bugfix on 0.2.1.5-alpha.
22656 Reported by "troll_un".
22657 - Fix null-pointer access that could occur if TLS allocation failed.
22658 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un".
22659 - Use tor_socket_t type for listener argument to accept(). Fixes bug
22660 4535; bugfix on 0.2.2.28-beta. Found by "troll_un".
22663 - Add two new config options for directory authorities:
22664 AuthDirFastGuarantee sets a bandwidth threshold for guaranteeing the
22665 Fast flag, and AuthDirGuardBWGuarantee sets a bandwidth threshold
22666 that is always sufficient to satisfy the bandwidth requirement for
22667 the Guard flag. Now it will be easier for researchers to simulate
22668 Tor networks with different values. Resolves ticket 4484.
22669 - When Tor ignores a hidden service specified in its configuration,
22670 include the hidden service's directory in the warning message.
22671 Previously, we would only tell the user that some hidden service
22672 was ignored. Bugfix on 0.0.6; fixes bug 4426.
22673 - Update to the December 6 2011 Maxmind GeoLite Country database.
22675 o Packaging changes:
22676 - Make it easier to automate expert package builds on Windows,
22677 by removing an absolute path from makensis.exe command.
22680 Changes in version 0.2.1.32 - 2011-12-16
22681 Tor 0.2.1.32 backports important security and privacy fixes for
22682 oldstable. This release is intended only for package maintainers and
22683 others who cannot use the 0.2.2 stable series. All others should be
22684 using Tor 0.2.2.x or newer.
22686 The Tor 0.2.1.x series will reach formal end-of-life some time in
22687 early 2012; we will stop releasing patches for it then.
22689 o Major bugfixes (also included in 0.2.2.x):
22690 - Correctly sanity-check that we don't underflow on a memory
22691 allocation (and then assert) for hidden service introduction
22692 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
22693 bugfix on 0.2.1.5-alpha.
22694 - Fix a heap overflow bug that could occur when trying to pull
22695 data into the first chunk of a buffer, when that chunk had
22696 already had some data drained from it. Fixes CVE-2011-2778;
22697 bugfix on 0.2.0.16-alpha. Reported by "Vektor".
22700 - Update to the December 6 2011 Maxmind GeoLite Country database.
22703 Changes in version 0.2.3.9-alpha - 2011-12-08
22704 Tor 0.2.3.9-alpha introduces initial IPv6 support for bridges, adds
22705 a "DisableNetwork" security feature that bundles can use to avoid
22706 touching the network until bridges are configured, moves forward on
22707 the pluggable transport design, fixes a flaw in the hidden service
22708 design that unnecessarily prevented clients with wrong clocks from
22709 reaching hidden services, and fixes a wide variety of other issues.
22712 - Clients can now connect to private bridges over IPv6. Bridges
22713 still need at least one IPv4 address in order to connect to
22714 other relays. Note that we don't yet handle the case where the
22715 user has two bridge lines for the same bridge (one IPv4, one
22716 IPv6). Implements parts of proposal 186.
22717 - New "DisableNetwork" config option to prevent Tor from launching any
22718 connections or accepting any connections except on a control port.
22719 Bundles and controllers can set this option before letting Tor talk
22720 to the rest of the network, for example to prevent any connections
22721 to a non-bridge address. Packages like Orbot can also use this
22722 option to instruct Tor to save power when the network is off.
22723 - Clients and bridges can now be configured to use a separate
22724 "transport" proxy. This approach makes the censorship arms race
22725 easier by allowing bridges to use protocol obfuscation plugins. It
22726 implements the "managed proxy" part of proposal 180 (ticket 3472).
22727 - When using OpenSSL 1.0.0 or later, use OpenSSL's counter mode
22728 implementation. It makes AES_CTR about 7% faster than our old one
22729 (which was about 10% faster than the one OpenSSL used to provide).
22730 Resolves ticket 4526.
22731 - Add a "tor2web mode" for clients that want to connect to hidden
22732 services non-anonymously (and possibly more quickly). As a safety
22733 measure to try to keep users from turning this on without knowing
22734 what they are doing, tor2web mode must be explicitly enabled at
22735 compile time, and a copy of Tor compiled to run in tor2web mode
22736 cannot be used as a normal Tor client. Implements feature 2553.
22737 - Add experimental support for running on Windows with IOCP and no
22738 kernel-space socket buffers. This feature is controlled by a new
22739 "UserspaceIOCPBuffers" config option (off by default), which has
22740 no effect unless Tor has been built with support for bufferevents,
22741 is running on Windows, and has enabled IOCP. This may, in the long
22742 run, help solve or mitigate bug 98.
22743 - Use a more secure consensus parameter voting algorithm. Now at
22744 least three directory authorities or a majority of them must
22745 vote on a given parameter before it will be included in the
22746 consensus. Implements proposal 178.
22749 - Hidden services now ignore the timestamps on INTRODUCE2 cells.
22750 They used to check that the timestamp was within 30 minutes
22751 of their system clock, so they could cap the size of their
22752 replay-detection cache, but that approach unnecessarily refused
22753 service to clients with wrong clocks. Bugfix on 0.2.1.6-alpha, when
22754 the v3 intro-point protocol (the first one which sent a timestamp
22755 field in the INTRODUCE2 cell) was introduced; fixes bug 3460.
22756 - Only use the EVP interface when AES acceleration is enabled,
22757 to avoid a 5-7% performance regression. Resolves issue 4525;
22758 bugfix on 0.2.3.8-alpha.
22760 o Privacy/anonymity features (bridge detection):
22761 - Make bridge SSL certificates a bit more stealthy by using random
22762 serial numbers, in the same fashion as OpenSSL when generating
22763 self-signed certificates. Implements ticket 4584.
22764 - Introduce a new config option "DynamicDHGroups", enabled by
22765 default, which provides each bridge with a unique prime DH modulus
22766 to be used during SSL handshakes. This option attempts to help
22767 against censors who might use the Apache DH modulus as a static
22768 identifier for bridges. Addresses ticket 4548.
22770 o Minor features (new/different config options):
22771 - New configuration option "DisableDebuggerAttachment" (on by default)
22772 to prevent basic debugging attachment attempts by other processes.
22773 Supports Mac OS X and Gnu/Linux. Resolves ticket 3313.
22774 - Allow MapAddress directives to specify matches against super-domains,
22775 as in "MapAddress *.torproject.org *.torproject.org.torserver.exit".
22776 Implements issue 933.
22777 - Slightly change behavior of "list" options (that is, config
22778 options that can appear more than once) when they appear both in
22779 torrc and on the command line. Previously, the command-line options
22780 would be appended to the ones from torrc. Now, the command-line
22781 options override the torrc options entirely. This new behavior
22782 allows the user to override list options (like exit policies and
22783 ports to listen on) from the command line, rather than simply
22784 appending to the list.
22785 - You can get the old (appending) command-line behavior for "list"
22786 options by prefixing the option name with a "+".
22787 - You can remove all the values for a "list" option from the command
22788 line without adding any new ones by prefixing the option name
22790 - Add experimental support for a "defaults" torrc file to be parsed
22791 before the regular torrc. Torrc options override the defaults file's
22792 options in the same way that the command line overrides the torrc.
22793 The SAVECONF controller command saves only those options which
22794 differ between the current configuration and the defaults file. HUP
22795 reloads both files. (Note: This is an experimental feature; its
22796 behavior will probably be refined in future 0.2.3.x-alpha versions
22797 to better meet packagers' needs.) Implements task 4552.
22800 - Try to make the introductory warning message that Tor prints on
22801 startup more useful for actually finding help and information.
22802 Resolves ticket 2474.
22803 - Running "make version" now displays the version of Tor that
22804 we're about to build. Idea from katmagic; resolves issue 4400.
22805 - Expire old or over-used hidden service introduction points.
22806 Required by fix for bug 3460.
22807 - Move the replay-detection cache for the RSA-encrypted parts of
22808 INTRODUCE2 cells to the introduction point data structures.
22809 Previously, we would use one replay-detection cache per hidden
22810 service. Required by fix for bug 3460.
22811 - Reduce the lifetime of elements of hidden services' Diffie-Hellman
22812 public key replay-detection cache from 60 minutes to 5 minutes. This
22813 replay-detection cache is now used only to detect multiple
22814 INTRODUCE2 cells specifying the same rendezvous point, so we can
22815 avoid launching multiple simultaneous attempts to connect to it.
22817 o Minor bugfixes (on Tor 0.2.2.x and earlier):
22818 - Resolve an integer overflow bug in smartlist_ensure_capacity().
22819 Fixes bug 4230; bugfix on Tor 0.1.0.1-rc. Based on a patch by
22821 - Fix a minor formatting issue in one of tor-gencert's error messages.
22823 - Prevent a false positive from the check-spaces script, by disabling
22824 the "whitespace between function name and (" check for functions
22826 - Fix a log message suggesting that people contact a non-existent
22827 email address. Fixes bug 3448.
22828 - Fix null-pointer access that could occur if TLS allocation failed.
22829 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un".
22830 - Report a real bootstrap problem to the controller on router
22831 identity mismatch. Previously we just said "foo", which probably
22832 made a lot of sense at the time. Fixes bug 4169; bugfix on
22834 - If we had ever tried to call tor_addr_to_str() on an address of
22835 unknown type, we would have done a strdup() on an uninitialized
22836 buffer. Now we won't. Fixes bug 4529; bugfix on 0.2.1.3-alpha.
22837 Reported by "troll_un".
22838 - Correctly detect and handle transient lookup failures from
22839 tor_addr_lookup(). Fixes bug 4530; bugfix on 0.2.1.5-alpha.
22840 Reported by "troll_un".
22841 - Use tor_socket_t type for listener argument to accept(). Fixes bug
22842 4535; bugfix on 0.2.2.28-beta. Found by "troll_un".
22843 - Initialize conn->addr to a valid state in spawn_cpuworker(). Fixes
22844 bug 4532; found by "troll_un".
22846 o Minor bugfixes (on Tor 0.2.3.x):
22847 - Fix a compile warning in tor_inet_pton(). Bugfix on 0.2.3.8-alpha;
22849 - Don't send two ESTABLISH_RENDEZVOUS cells when opening a new
22850 circuit for use as a hidden service client's rendezvous point.
22851 Fixes bugs 4641 and 4171; bugfix on 0.2.3.3-alpha. Diagnosed
22852 with help from wanoskarnet.
22853 - Restore behavior of overriding SocksPort, ORPort, and similar
22854 options from the command line. Bugfix on 0.2.3.3-alpha.
22857 - Properly handle the case where the build-tree is not the same
22858 as the source tree when generating src/common/common_sha1.i,
22859 src/or/micro-revision.i, and src/or/or_sha1.i. Fixes bug 3953;
22860 bugfix on 0.2.0.1-alpha.
22862 o Code simplifications, cleanups, and refactorings:
22863 - Remove the pure attribute from all functions that used it
22864 previously. In many cases we assigned it incorrectly, because the
22865 functions might assert or call impure functions, and we don't have
22866 evidence that keeping the pure attribute is worthwhile. Implements
22867 changes suggested in ticket 4421.
22868 - Remove some dead code spotted by coverity. Fixes cid 432.
22869 Bugfix on 0.2.3.1-alpha, closes bug 4637.
22872 Changes in version 0.2.3.8-alpha - 2011-11-22
22873 Tor 0.2.3.8-alpha fixes some crash and assert bugs, including a
22874 socketpair-related bug that has been bothering Windows users. It adds
22875 support to serve microdescriptors to controllers, so Vidalia's network
22876 map can resume listing relays (once Vidalia implements its side),
22877 and adds better support for hardware AES acceleration. Finally, it
22878 starts the process of adjusting the bandwidth cutoff for getting the
22879 "Fast" flag from 20KB to (currently) 32KB -- preliminary results show
22880 that tiny relays harm performance more than they help network capacity.
22883 - Initialize Libevent with the EVENT_BASE_FLAG_NOLOCK flag enabled, so
22884 that it doesn't attempt to allocate a socketpair. This could cause
22885 some problems on Windows systems with overzealous firewalls. Fix for
22886 bug 4457; workaround for Libevent versions 2.0.1-alpha through
22888 - Correctly sanity-check that we don't underflow on a memory
22889 allocation (and then assert) for hidden service introduction
22890 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
22891 bugfix on 0.2.1.5-alpha.
22892 - Remove the artificially low cutoff of 20KB to guarantee the Fast
22893 flag. In the past few years the average relay speed has picked
22894 up, and while the "top 7/8 of the network get the Fast flag" and
22895 "all relays with 20KB or more of capacity get the Fast flag" rules
22896 used to have the same result, now the top 7/8 of the network has
22897 a capacity more like 32KB. Bugfix on 0.2.1.14-rc. Fixes bug 4489.
22898 - Fix a rare assertion failure when checking whether a v0 hidden
22899 service descriptor has any usable introduction points left, and
22900 we don't have enough information to build a circuit to the first
22901 intro point named in the descriptor. The HS client code in
22902 0.2.3.x no longer uses v0 HS descriptors, but this assertion can
22903 trigger on (and crash) v0 HS authorities. Fixes bug 4411.
22904 Bugfix on 0.2.3.1-alpha; diagnosed by frosty_un.
22905 - Make bridge authorities not crash when they are asked for their own
22906 descriptor. Bugfix on 0.2.3.7-alpha, reported by Lucky Green.
22907 - When running as a client, do not print a misleading (and plain
22908 wrong) log message that we're collecting "directory request"
22909 statistics: clients don't collect statistics. Also don't create a
22910 useless (because empty) stats file in the stats/ directory. Fixes
22911 bug 4353; bugfix on 0.2.2.34 and 0.2.3.7-alpha.
22914 - Allow Tor controllers like Vidalia to obtain the microdescriptor
22915 for a relay by identity digest or nickname. Previously,
22916 microdescriptors were only available by their own digests, so a
22917 controller would have to ask for and parse the whole microdescriptor
22918 consensus in order to look up a single relay's microdesc. Fixes
22919 bug 3832; bugfix on 0.2.3.1-alpha.
22920 - Use OpenSSL's EVP interface for AES encryption, so that all AES
22921 operations can use hardware acceleration (if present). Resolves
22924 o Minor bugfixes (on 0.2.2.x and earlier):
22925 - Detect failure to initialize Libevent. This fix provides better
22926 detection for future instances of bug 4457.
22927 - Avoid frequent calls to the fairly expensive cull_wedged_cpuworkers
22928 function. This was eating up hideously large amounts of time on some
22929 busy servers. Fixes bug 4518; bugfix on 0.0.9.8.
22930 - Don't warn about unused log_mutex in log.c when building with
22931 --disable-threads using a recent GCC. Fixes bug 4437; bugfix on
22932 0.1.0.6-rc which introduced --disable-threads.
22933 - Allow manual 'authenticate' commands to the controller interface
22934 from netcat (nc) as well as telnet. We were rejecting them because
22935 they didn't come with the expected whitespace at the end of the
22936 command. Bugfix on 0.1.1.1-alpha; fixes bug 2893.
22937 - Fix some (not actually triggerable) buffer size checks in usage of
22938 tor_inet_ntop. Fixes bug 4434; bugfix on Tor 0.2.0.1-alpha. Patch
22940 - Fix parsing of some corner-cases with tor_inet_pton(). Fixes
22941 bug 4515; bugfix on 0.2.0.1-alpha; fix by Anders Sundman.
22942 - When configuring, starting, or stopping an NT service, stop
22943 immediately after the service configuration attempt has succeeded
22944 or failed. Fixes bug 3963; bugfix on 0.2.0.7-alpha.
22945 - When sending a NETINFO cell, include the original address
22946 received for the other side, not its canonical address. Found
22947 by "troll_un"; fixes bug 4349; bugfix on 0.2.0.10-alpha.
22948 - Rename the bench_{aes,dmap} functions to test_*, so that tinytest
22949 can pick them up when the tests aren't disabled. Bugfix on
22950 0.2.2.4-alpha which introduced tinytest.
22951 - Fix a memory leak when we check whether a hidden service
22952 descriptor has any usable introduction points left. Fixes bug
22953 4424. Bugfix on 0.2.2.25-alpha.
22954 - Fix a memory leak in launch_direct_bridge_descriptor_fetch() that
22955 occurred when a client tried to fetch a descriptor for a bridge
22956 in ExcludeNodes. Fixes bug 4383; bugfix on 0.2.2.25-alpha.
22958 o Minor bugfixes (on 0.2.3.x):
22959 - Make util unit tests build correctly with MSVC. Bugfix on
22960 0.2.3.3-alpha. Patch by Gisle Vanem.
22961 - Successfully detect AUTH_CHALLENGE cells with no recognized
22962 authentication type listed. Fixes bug 4367; bugfix on 0.2.3.6-alpha.
22963 Found by frosty_un.
22964 - If a relay receives an AUTH_CHALLENGE cell it can't answer,
22965 it should still send a NETINFO cell to allow the connection to
22966 become open. Fixes bug 4368; fix on 0.2.3.6-alpha; bug found by
22968 - Log less loudly when we get an invalid authentication certificate
22969 from a source other than a directory authority: it's not unusual
22970 to see invalid certs because of clock skew. Fixes bug 4370; bugfix
22972 - Tolerate servers with more clock skew in their authentication
22973 certificates than previously. Fixes bug 4371; bugfix on
22975 - Fix a couple of compile warnings on Windows. Fixes bug 4469; bugfix
22976 on 0.2.3.4-alpha and 0.2.3.6-alpha.
22979 - Add two new config options for directory authorities:
22980 AuthDirFastGuarantee sets a bandwidth threshold for guaranteeing the
22981 Fast flag, and AuthDirGuardBWGuarantee sets a bandwidth threshold
22982 that is always sufficient to satisfy the bandwidth requirement for
22983 the Guard flag. Now it will be easier for researchers to simulate
22984 Tor networks with different values. Resolves ticket 4484.
22985 - When Tor ignores a hidden service specified in its configuration,
22986 include the hidden service's directory in the warning message.
22987 Previously, we would only tell the user that some hidden service
22988 was ignored. Bugfix on 0.0.6; fixes bug 4426.
22989 - When we fail to initialize Libevent, retry with IOCP disabled so we
22990 don't need to turn on multi-threading support in Libevent, which in
22991 turn requires a working socketpair(). This is a workaround for bug
22992 4457, which affects Libevent versions from 2.0.1-alpha through
22994 - Detect when we try to build on a platform that doesn't define
22995 AF_UNSPEC to 0. We don't work there, so refuse to compile.
22996 - Update to the November 1 2011 Maxmind GeoLite Country database.
22998 o Packaging changes:
22999 - Make it easier to automate expert package builds on Windows,
23000 by removing an absolute path from makensis.exe command.
23002 o Code simplifications and refactoring:
23003 - Remove some redundant #include directives throughout the code.
23004 Patch from Andrea Gelmini.
23005 - Unconditionally use OpenSSL's AES implementation instead of our
23006 old built-in one. OpenSSL's AES has been better for a while, and
23007 relatively few servers should still be on any version of OpenSSL
23008 that doesn't have good optimized assembly AES.
23009 - Use the name "CERTS" consistently to refer to the new cell type;
23010 we were calling it CERT in some places and CERTS in others.
23013 - Numerous new unit tests for functions in util.c and address.c by
23015 - The long-disabled benchmark tests are now split into their own
23016 ./src/test/bench binary.
23017 - The benchmark tests can now use more accurate timers than
23018 gettimeofday() when such timers are available.
23021 Changes in version 0.2.3.7-alpha - 2011-10-30
23022 Tor 0.2.3.7-alpha fixes a crash bug in 0.2.3.6-alpha introduced by
23023 the new v3 handshake. It also resolves yet another bridge address
23027 - If we mark an OR connection for close based on a cell we process,
23028 don't process any further cells on it. We already avoid further
23029 reads on marked-for-close connections, but now we also discard the
23030 cells we'd already read. Fixes bug 4299; bugfix on 0.2.0.10-alpha,
23031 which was the first version where we might mark a connection for
23032 close based on processing a cell on it.
23033 - Fix a double-free bug that would occur when we received an invalid
23034 certificate in a CERT cell in the new v3 handshake. Fixes bug 4343;
23035 bugfix on 0.2.3.6-alpha.
23036 - Bridges no longer include their address in NETINFO cells on outgoing
23037 OR connections, to allow them to blend in better with clients.
23038 Removes another avenue for enumerating bridges. Reported by
23039 "troll_un". Fixes bug 4348; bugfix on 0.2.0.10-alpha, when NETINFO
23040 cells were introduced.
23043 - Fixed a typo in a hibernation-related log message. Fixes bug 4331;
23044 bugfix on 0.2.2.23-alpha; found by "tmpname0901".
23047 Changes in version 0.2.3.6-alpha - 2011-10-26
23048 Tor 0.2.3.6-alpha includes the fix from 0.2.2.34 for a critical
23049 anonymity vulnerability where an attacker can deanonymize Tor
23050 users. Everybody should upgrade.
23052 This release also features support for a new v3 connection handshake
23053 protocol, and fixes to make hidden service connections more robust.
23056 - Implement a new handshake protocol (v3) for authenticating Tors to
23057 each other over TLS. It should be more resistant to fingerprinting
23058 than previous protocols, and should require less TLS hacking for
23059 future Tor implementations. Implements proposal 176.
23060 - Allow variable-length padding cells to disguise the length of
23061 Tor's TLS records. Implements part of proposal 184.
23063 o Privacy/anonymity fixes (clients):
23064 - Clients and bridges no longer send TLS certificate chains on
23065 outgoing OR connections. Previously, each client or bridge would
23066 use the same cert chain for all outgoing OR connections until
23067 its IP address changes, which allowed any relay that the client
23068 or bridge contacted to determine which entry guards it is using.
23069 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
23070 - If a relay receives a CREATE_FAST cell on a TLS connection, it
23071 no longer considers that connection as suitable for satisfying a
23072 circuit EXTEND request. Now relays can protect clients from the
23073 CVE-2011-2768 issue even if the clients haven't upgraded yet.
23074 - Directory authorities no longer assign the Guard flag to relays
23075 that haven't upgraded to the above "refuse EXTEND requests
23076 to client connections" fix. Now directory authorities can
23077 protect clients from the CVE-2011-2768 issue even if neither
23078 the clients nor the relays have upgraded yet. There's a new
23079 "GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays" config option
23080 to let us transition smoothly, else tomorrow there would be no
23083 o Major bugfixes (hidden services):
23084 - Improve hidden service robustness: when an attempt to connect to
23085 a hidden service ends, be willing to refetch its hidden service
23086 descriptors from each of the HSDir relays responsible for them
23087 immediately. Previously, we would not consider refetching the
23088 service's descriptors from each HSDir for 15 minutes after the last
23089 fetch, which was inconvenient if the hidden service was not running
23090 during the first attempt. Bugfix on 0.2.0.18-alpha; fixes bug 3335.
23091 - When one of a hidden service's introduction points appears to be
23092 unreachable, stop trying it. Previously, we would keep trying
23093 to build circuits to the introduction point until we lost the
23094 descriptor, usually because the user gave up and restarted Tor.
23095 Partly fixes bug 3825.
23096 - Don't launch a useless circuit after failing to use one of a
23097 hidden service's introduction points. Previously, we would
23098 launch a new introduction circuit, but not set the hidden service
23099 which that circuit was intended to connect to, so it would never
23100 actually be used. A different piece of code would then create a
23101 new introduction circuit correctly. Bug reported by katmagic and
23102 found by Sebastian Hahn. Bugfix on 0.2.1.13-alpha; fixes bug 4212.
23104 o Major bugfixes (other):
23105 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
23106 that they initiated. Relays could distinguish incoming bridge
23107 connections from client connections, creating another avenue for
23108 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
23109 Found by "frosty_un".
23110 - Don't update the AccountingSoftLimitHitAt state file entry whenever
23111 tor gets started. This prevents a wrong average bandwidth
23112 estimate, which would cause relays to always start a new accounting
23113 interval at the earliest possible moment. Fixes bug 2003; bugfix
23114 on 0.2.2.7-alpha. Reported by BryonEldridge, who also helped
23115 immensely in tracking this bug down.
23116 - Fix a crash bug when changing node restrictions while a DNS lookup
23117 is in-progress. Fixes bug 4259; bugfix on 0.2.2.25-alpha. Bugfix
23120 o Minor bugfixes (on 0.2.2.x and earlier):
23121 - When a hidden service turns an extra service-side introduction
23122 circuit into a general-purpose circuit, free the rend_data and
23123 intro_key fields first, so we won't leak memory if the circuit
23124 is cannibalized for use as another service-side introduction
23125 circuit. Bugfix on 0.2.1.7-alpha; fixes bug 4251.
23126 - Rephrase the log message emitted if the TestSocks check is
23127 successful. Patch from Fabian Keil; fixes bug 4094.
23128 - Bridges now skip DNS self-tests, to act a little more stealthily.
23129 Fixes bug 4201; bugfix on 0.2.0.3-alpha, which first introduced
23130 bridges. Patch by "warms0x".
23131 - Remove a confusing dollar sign from the example fingerprint in the
23132 man page, and also make the example fingerprint a valid one. Fixes
23133 bug 4309; bugfix on 0.2.1.3-alpha.
23134 - Fix internal bug-checking logic that was supposed to catch
23135 failures in digest generation so that it will fail more robustly
23136 if we ask for a nonexistent algorithm. Found by Coverity Scan.
23137 Bugfix on 0.2.2.1-alpha; fixes Coverity CID 479.
23138 - Report any failure in init_keys() calls launched because our
23139 IP address has changed. Spotted by Coverity Scan. Bugfix on
23140 0.1.1.4-alpha; fixes CID 484.
23142 o Minor bugfixes (on 0.2.3.x):
23143 - Fix a bug in configure.in that kept it from building a configure
23144 script with autoconf versions earlier than 2.61. Fixes bug 2430;
23145 bugfix on 0.2.3.1-alpha.
23146 - Don't warn users that they are exposing a client port to the
23147 Internet if they have specified an RFC1918 address. Previously,
23148 we would warn if the user had specified any non-loopback
23149 address. Bugfix on 0.2.3.3-alpha. Fixes bug 4018; reported by Tas.
23150 - Fix memory leaks in the failing cases of the new SocksPort and
23151 ControlPort code. Found by Coverity Scan. Bugfix on 0.2.3.3-alpha;
23152 fixes coverity CIDs 485, 486, and 487.
23155 - When a hidden service's introduction point times out, consider
23156 trying it again during the next attempt to connect to the
23157 HS. Previously, we would not try it again unless a newly fetched
23158 descriptor contained it. Required by fixes for bugs 1297 and 3825.
23159 - The next version of Windows will be called Windows 8, and it has
23160 a major version of 6, minor version of 2. Correctly identify that
23161 version instead of calling it "Very recent version". Resolves
23162 ticket 4153; reported by funkstar.
23163 - The Bridge Authority now writes statistics on how many bridge
23164 descriptors it gave out in total, and how many unique descriptors
23165 it gave out. It also lists how often the most and least commonly
23166 fetched descriptors were given out, as well as the median and
23167 25th/75th percentile. Implements tickets 4200 and 4294.
23168 - Update to the October 4 2011 Maxmind GeoLite Country database.
23170 o Code simplifications and refactoring:
23171 - Remove some old code to remember statistics about which descriptors
23172 we've served as a directory mirror. The feature wasn't used and
23173 is outdated now that microdescriptors are around.
23174 - Rename Tor functions that turn strings into addresses, so that
23175 "parse" indicates that no hostname resolution occurs, and
23176 "lookup" indicates that hostname resolution may occur. This
23177 should help prevent mistakes in the future. Fixes bug 3512.
23180 Changes in version 0.2.2.34 - 2011-10-26
23181 Tor 0.2.2.34 fixes a critical anonymity vulnerability where an attacker
23182 can deanonymize Tor users. Everybody should upgrade.
23184 The attack relies on four components: 1) Clients reuse their TLS cert
23185 when talking to different relays, so relays can recognize a user by
23186 the identity key in her cert. 2) An attacker who knows the client's
23187 identity key can probe each guard relay to see if that identity key
23188 is connected to that guard relay right now. 3) A variety of active
23189 attacks in the literature (starting from "Low-Cost Traffic Analysis
23190 of Tor" by Murdoch and Danezis in 2005) allow a malicious website to
23191 discover the guard relays that a Tor user visiting the website is using.
23192 4) Clients typically pick three guards at random, so the set of guards
23193 for a given user could well be a unique fingerprint for her. This
23194 release fixes components #1 and #2, which is enough to block the attack;
23195 the other two remain as open research problems. Special thanks to
23196 "frosty_un" for reporting the issue to us!
23198 Clients should upgrade so they are no longer recognizable by the TLS
23199 certs they present. Relays should upgrade so they no longer allow a
23200 remote attacker to probe them to test whether unpatched clients are
23201 currently connected to them.
23203 This release also fixes several vulnerabilities that allow an attacker
23204 to enumerate bridge relays. Some bridge enumeration attacks still
23205 remain; see for example proposal 188.
23207 o Privacy/anonymity fixes (clients):
23208 - Clients and bridges no longer send TLS certificate chains on
23209 outgoing OR connections. Previously, each client or bridge would
23210 use the same cert chain for all outgoing OR connections until
23211 its IP address changes, which allowed any relay that the client
23212 or bridge contacted to determine which entry guards it is using.
23213 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
23214 - If a relay receives a CREATE_FAST cell on a TLS connection, it
23215 no longer considers that connection as suitable for satisfying a
23216 circuit EXTEND request. Now relays can protect clients from the
23217 CVE-2011-2768 issue even if the clients haven't upgraded yet.
23218 - Directory authorities no longer assign the Guard flag to relays
23219 that haven't upgraded to the above "refuse EXTEND requests
23220 to client connections" fix. Now directory authorities can
23221 protect clients from the CVE-2011-2768 issue even if neither
23222 the clients nor the relays have upgraded yet. There's a new
23223 "GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays" config option
23224 to let us transition smoothly, else tomorrow there would be no
23227 o Privacy/anonymity fixes (bridge enumeration):
23228 - Bridge relays now do their directory fetches inside Tor TLS
23229 connections, like all the other clients do, rather than connecting
23230 directly to the DirPort like public relays do. Removes another
23231 avenue for enumerating bridges. Fixes bug 4115; bugfix on 0.2.0.35.
23232 - Bridges relays now build circuits for themselves in a more similar
23233 way to how clients build them. Removes another avenue for
23234 enumerating bridges. Fixes bug 4124; bugfix on 0.2.0.3-alpha,
23235 when bridges were introduced.
23236 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
23237 that they initiated. Relays could distinguish incoming bridge
23238 connections from client connections, creating another avenue for
23239 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
23240 Found by "frosty_un".
23243 - Fix a crash bug when changing node restrictions while a DNS lookup
23244 is in-progress. Fixes bug 4259; bugfix on 0.2.2.25-alpha. Bugfix
23246 - Don't launch a useless circuit after failing to use one of a
23247 hidden service's introduction points. Previously, we would
23248 launch a new introduction circuit, but not set the hidden service
23249 which that circuit was intended to connect to, so it would never
23250 actually be used. A different piece of code would then create a
23251 new introduction circuit correctly. Bug reported by katmagic and
23252 found by Sebastian Hahn. Bugfix on 0.2.1.13-alpha; fixes bug 4212.
23255 - Change an integer overflow check in the OpenBSD_Malloc code so
23256 that GCC is less likely to eliminate it as impossible. Patch
23257 from Mansour Moufid. Fixes bug 4059.
23258 - When a hidden service turns an extra service-side introduction
23259 circuit into a general-purpose circuit, free the rend_data and
23260 intro_key fields first, so we won't leak memory if the circuit
23261 is cannibalized for use as another service-side introduction
23262 circuit. Bugfix on 0.2.1.7-alpha; fixes bug 4251.
23263 - Bridges now skip DNS self-tests, to act a little more stealthily.
23264 Fixes bug 4201; bugfix on 0.2.0.3-alpha, which first introduced
23265 bridges. Patch by "warms0x".
23266 - Fix internal bug-checking logic that was supposed to catch
23267 failures in digest generation so that it will fail more robustly
23268 if we ask for a nonexistent algorithm. Found by Coverity Scan.
23269 Bugfix on 0.2.2.1-alpha; fixes Coverity CID 479.
23270 - Report any failure in init_keys() calls launched because our
23271 IP address has changed. Spotted by Coverity Scan. Bugfix on
23272 0.1.1.4-alpha; fixes CID 484.
23274 o Minor bugfixes (log messages and documentation):
23275 - Remove a confusing dollar sign from the example fingerprint in the
23276 man page, and also make the example fingerprint a valid one. Fixes
23277 bug 4309; bugfix on 0.2.1.3-alpha.
23278 - The next version of Windows will be called Windows 8, and it has
23279 a major version of 6, minor version of 2. Correctly identify that
23280 version instead of calling it "Very recent version". Resolves
23281 ticket 4153; reported by funkstar.
23282 - Downgrade log messages about circuit timeout calibration from
23283 "notice" to "info": they don't require or suggest any human
23284 intervention. Patch from Tom Lowenthal. Fixes bug 4063;
23285 bugfix on 0.2.2.14-alpha.
23288 - Turn on directory request statistics by default and include them in
23289 extra-info descriptors. Don't break if we have no GeoIP database.
23290 Backported from 0.2.3.1-alpha; implements ticket 3951.
23291 - Update to the October 4 2011 Maxmind GeoLite Country database.
23294 Changes in version 0.2.1.31 - 2011-10-26
23295 Tor 0.2.1.31 backports important security and privacy fixes for
23296 oldstable. This release is intended only for package maintainers and
23297 others who cannot use the 0.2.2 stable series. All others should be
23298 using Tor 0.2.2.x or newer.
23300 o Security fixes (also included in 0.2.2.x):
23301 - Replace all potentially sensitive memory comparison operations
23302 with versions whose runtime does not depend on the data being
23303 compared. This will help resist a class of attacks where an
23304 adversary can use variations in timing information to learn
23305 sensitive data. Fix for one case of bug 3122. (Safe memcmp
23306 implementation by Robert Ransom based partially on code by DJB.)
23307 - Fix an assert in parsing router descriptors containing IPv6
23308 addresses. This one took down the directory authorities when
23309 somebody tried some experimental code. Bugfix on 0.2.1.3-alpha.
23311 o Privacy/anonymity fixes (also included in 0.2.2.x):
23312 - Clients and bridges no longer send TLS certificate chains on
23313 outgoing OR connections. Previously, each client or bridge would
23314 use the same cert chain for all outgoing OR connections until
23315 its IP address changes, which allowed any relay that the client
23316 or bridge contacted to determine which entry guards it is using.
23317 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
23318 - If a relay receives a CREATE_FAST cell on a TLS connection, it
23319 no longer considers that connection as suitable for satisfying a
23320 circuit EXTEND request. Now relays can protect clients from the
23321 CVE-2011-2768 issue even if the clients haven't upgraded yet.
23322 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
23323 that they initiated. Relays could distinguish incoming bridge
23324 connections from client connections, creating another avenue for
23325 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
23326 Found by "frosty_un".
23327 - When receiving a hidden service descriptor, check that it is for
23328 the hidden service we wanted. Previously, Tor would store any
23329 hidden service descriptors that a directory gave it, whether it
23330 wanted them or not. This wouldn't have let an attacker impersonate
23331 a hidden service, but it did let directories pre-seed a client
23332 with descriptors that it didn't want. Bugfix on 0.0.6.
23333 - Avoid linkability based on cached hidden service descriptors: forget
23334 all hidden service descriptors cached as a client when processing a
23335 SIGNAL NEWNYM command. Fixes bug 3000; bugfix on 0.0.6.
23336 - Make the bridge directory authority refuse to answer directory
23337 requests for "all" descriptors. It used to include bridge
23338 descriptors in its answer, which was a major information leak.
23339 Found by "piebeer". Bugfix on 0.2.0.3-alpha.
23340 - Don't attach new streams to old rendezvous circuits after SIGNAL
23341 NEWNYM. Previously, we would keep using an existing rendezvous
23342 circuit if it remained open (i.e. if it were kept open by a
23343 long-lived stream, or if a new stream were attached to it before
23344 Tor could notice that it was old and no longer in use). Bugfix on
23345 0.1.1.15-rc; fixes bug 3375.
23347 o Minor bugfixes (also included in 0.2.2.x):
23348 - When we restart our relay, we might get a successful connection
23349 from the outside before we've started our reachability tests,
23350 triggering a warning: "ORPort found reachable, but I have no
23351 routerinfo yet. Failing to inform controller of success." This
23352 bug was harmless unless Tor is running under a controller
23353 like Vidalia, in which case the controller would never get a
23354 REACHABILITY_SUCCEEDED status event. Bugfix on 0.1.2.6-alpha;
23356 - Build correctly on OSX with zlib 1.2.4 and higher with all warnings
23357 enabled. Fixes bug 1526.
23358 - Remove undocumented option "-F" from tor-resolve: it hasn't done
23359 anything since 0.2.1.16-rc.
23360 - Avoid signed/unsigned comparisons by making SIZE_T_CEILING unsigned.
23361 None of the cases where we did this before were wrong, but by making
23362 this change we avoid warnings. Fixes bug 2475; bugfix on 0.2.1.28.
23363 - Fix a rare crash bug that could occur when a client was configured
23364 with a large number of bridges. Fixes bug 2629; bugfix on
23365 0.2.1.2-alpha. Bugfix by trac user "shitlei".
23366 - Correct the warning displayed when a rendezvous descriptor exceeds
23367 the maximum size. Fixes bug 2750; bugfix on 0.2.1.5-alpha. Found by
23369 - Fix an uncommon assertion failure when running with DNSPort under
23370 heavy load. Fixes bug 2933; bugfix on 0.2.0.1-alpha.
23371 - When warning about missing zlib development packages during compile,
23372 give the correct package names. Bugfix on 0.2.0.1-alpha.
23373 - Require that introduction point keys and onion keys have public
23374 exponent 65537. Bugfix on 0.2.0.10-alpha.
23375 - Do not crash when our configuration file becomes unreadable, for
23376 example due to a permissions change, between when we start up
23377 and when a controller calls SAVECONF. Fixes bug 3135; bugfix
23379 - Fix warnings from GCC 4.6's "-Wunused-but-set-variable" option.
23381 - Always NUL-terminate the sun_path field of a sockaddr_un before
23382 passing it to the kernel. (Not a security issue: kernels are
23383 smart enough to reject bad sockaddr_uns.) Found by Coverity;
23384 CID #428. Bugfix on Tor 0.2.0.3-alpha.
23385 - Don't stack-allocate the list of supplementary GIDs when we're
23386 about to log them. Stack-allocating NGROUPS_MAX gid_t elements
23387 could take up to 256K, which is way too much stack. Found by
23388 Coverity; CID #450. Bugfix on 0.2.1.7-alpha.
23390 o Minor bugfixes (only in 0.2.1.x):
23391 - Resume using micro-version numbers in 0.2.1.x: our Debian packages
23392 rely on them. Bugfix on 0.2.1.30.
23393 - Use git revisions instead of svn revisions when generating our
23394 micro-version numbers. Bugfix on 0.2.1.15-rc; fixes bug 2402.
23396 o Minor features (also included in 0.2.2.x):
23397 - Adjust the expiration time on our SSL session certificates to
23398 better match SSL certs seen in the wild. Resolves ticket 4014.
23399 - Allow nameservers with IPv6 address. Resolves bug 2574.
23400 - Update to the October 4 2011 Maxmind GeoLite Country database.
23403 Changes in version 0.2.3.5-alpha - 2011-09-28
23404 Tor 0.2.3.5-alpha fixes two bugs that make it possible to enumerate
23405 bridge relays; fixes an assertion error that many users started hitting
23406 today; and adds the ability to refill token buckets more often than
23407 once per second, allowing significant performance improvements.
23410 - Bridge relays now do their directory fetches inside Tor TLS
23411 connections, like all the other clients do, rather than connecting
23412 directly to the DirPort like public relays do. Removes another
23413 avenue for enumerating bridges. Fixes bug 4115; bugfix on 0.2.0.35.
23414 - Bridges relays now build circuits for themselves in a more similar
23415 way to how clients build them. Removes another avenue for
23416 enumerating bridges. Fixes bug 4124; bugfix on 0.2.0.3-alpha,
23417 when bridges were introduced.
23420 - Fix an "Assertion md->held_by_node == 1 failed" error that could
23421 occur when the same microdescriptor was referenced by two node_t
23422 objects at once. Fix for bug 4118; bugfix on Tor 0.2.3.1-alpha.
23424 o Major features (networking):
23425 - Add a new TokenBucketRefillInterval option to refill token buckets
23426 more frequently than once per second. This should improve network
23427 performance, alleviate queueing problems, and make traffic less
23428 bursty. Implements proposal 183; closes ticket 3630. Design by
23429 Florian Tschorsch and Björn Scheuermann; implementation by
23433 - Change an integer overflow check in the OpenBSD_Malloc code so
23434 that GCC is less likely to eliminate it as impossible. Patch
23435 from Mansour Moufid. Fixes bug 4059.
23437 o Minor bugfixes (usability):
23438 - Downgrade log messages about circuit timeout calibration from
23439 "notice" to "info": they don't require or suggest any human
23440 intervention. Patch from Tom Lowenthal. Fixes bug 4063;
23441 bugfix on 0.2.2.14-alpha.
23443 o Minor features (diagnostics):
23444 - When the system call to create a listener socket fails, log the
23445 error message explaining why. This may help diagnose bug 4027.
23448 Changes in version 0.2.3.4-alpha - 2011-09-13
23449 Tor 0.2.3.4-alpha includes the fixes from 0.2.2.33, including a slight
23450 tweak to Tor's TLS handshake that makes relays and bridges that run
23451 this new version reachable from Iran again. It also fixes a few new
23452 bugs in 0.2.3.x, and teaches relays to recognize when they're not
23453 listed in the network consensus and republish.
23455 o Major bugfixes (also part of 0.2.2.33):
23456 - Avoid an assertion failure when reloading a configuration with
23457 TrackExitHosts changes. Found and fixed by 'laruldan'. Fixes bug
23458 3923; bugfix on 0.2.2.25-alpha.
23460 o Minor features (security, also part of 0.2.2.33):
23461 - Check for replays of the public-key encrypted portion of an
23462 INTRODUCE1 cell, in addition to the current check for replays of
23463 the g^x value. This prevents a possible class of active attacks
23464 by an attacker who controls both an introduction point and a
23465 rendezvous point, and who uses the malleability of AES-CTR to
23466 alter the encrypted g^x portion of the INTRODUCE1 cell. We think
23467 that these attacks are infeasible (requiring the attacker to send
23468 on the order of zettabytes of altered cells in a short interval),
23469 but we'd rather block them off in case there are any classes of
23470 this attack that we missed. Reported by Willem Pinckaers.
23472 o Minor features (also part of 0.2.2.33):
23473 - Adjust the expiration time on our SSL session certificates to
23474 better match SSL certs seen in the wild. Resolves ticket 4014.
23475 - Change the default required uptime for a relay to be accepted as
23476 a HSDir (hidden service directory) from 24 hours to 25 hours.
23477 Improves on 0.2.0.10-alpha; resolves ticket 2649.
23478 - Add a VoteOnHidServDirectoriesV2 config option to allow directory
23479 authorities to abstain from voting on assignment of the HSDir
23480 consensus flag. Related to bug 2649.
23481 - Update to the September 6 2011 Maxmind GeoLite Country database.
23483 o Minor bugfixes (also part of 0.2.2.33):
23484 - Demote the 'replay detected' log message emitted when a hidden
23485 service receives the same Diffie-Hellman public key in two different
23486 INTRODUCE2 cells to info level. A normal Tor client can cause that
23487 log message during its normal operation. Bugfix on 0.2.1.6-alpha;
23488 fixes part of bug 2442.
23489 - Demote the 'INTRODUCE2 cell is too {old,new}' log message to info
23490 level. There is nothing that a hidden service's operator can do
23491 to fix its clients' clocks. Bugfix on 0.2.1.6-alpha; fixes part
23493 - Clarify a log message specifying the characters permitted in
23494 HiddenServiceAuthorizeClient client names. Previously, the log
23495 message said that "[A-Za-z0-9+-_]" were permitted; that could have
23496 given the impression that every ASCII character between "+" and "_"
23497 was permitted. Now we say "[A-Za-z0-9+_-]". Bugfix on 0.2.1.5-alpha.
23499 o Build fixes (also part of 0.2.2.33):
23500 - Clean up some code issues that prevented Tor from building on older
23501 BSDs. Fixes bug 3894; reported by "grarpamp".
23502 - Search for a platform-specific version of "ar" when cross-compiling.
23503 Should fix builds on iOS. Resolves bug 3909, found by Marco Bonetti.
23506 - Fix a bug where the SocksPort option (for example) would get
23507 ignored and replaced by the default if a SocksListenAddress
23508 option was set. Bugfix on 0.2.3.3-alpha; fixes bug 3936. Fix by
23512 - Relays now try regenerating and uploading their descriptor more
23513 frequently if they are not listed in the consensus, or if the
23514 version of their descriptor listed in the consensus is too
23515 old. This fix should prevent situations where a server declines
23516 to re-publish itself because it has done so too recently, even
23517 though the authorities decided not to list its recent-enough
23518 descriptor. Fix for bug 3327.
23521 - Relays now include a reason for regenerating their descriptors
23522 in an HTTP header when uploading to the authorities. This will
23523 make it easier to debug descriptor-upload issues in the future.
23524 - When starting as root and then changing our UID via the User
23525 control option, and we have a ControlSocket configured, make sure
23526 that the ControlSocket is owned by the same account that Tor will
23527 run under. Implements ticket 3421; fix by Jérémy Bobbio.
23530 - Abort if tor_vasprintf fails in connection_printf_to_buf (a
23531 utility function used in the control-port code). This shouldn't
23532 ever happen unless Tor is completely out of memory, but if it did
23533 happen and Tor somehow recovered from it, Tor could have sent a log
23534 message to a control port in the middle of a reply to a controller
23535 command. Fixes part of bug 3428; bugfix on 0.1.2.3-alpha.
23536 - Make 'FetchUselessDescriptors' cause all descriptor types and
23537 all consensus types (including microdescriptors) to get fetched.
23538 Fixes bug 3851; bugfix on 0.2.3.1-alpha.
23540 o Code refactoring:
23541 - Make a new "entry connection" struct as an internal subtype of "edge
23542 connection", to simplify the code and make exit connections smaller.
23545 Changes in version 0.2.2.33 - 2011-09-13
23546 Tor 0.2.2.33 fixes several bugs, and includes a slight tweak to Tor's
23547 TLS handshake that makes relays and bridges that run this new version
23548 reachable from Iran again.
23551 - Avoid an assertion failure when reloading a configuration with
23552 TrackExitHosts changes. Found and fixed by 'laruldan'. Fixes bug
23553 3923; bugfix on 0.2.2.25-alpha.
23555 o Minor features (security):
23556 - Check for replays of the public-key encrypted portion of an
23557 INTRODUCE1 cell, in addition to the current check for replays of
23558 the g^x value. This prevents a possible class of active attacks
23559 by an attacker who controls both an introduction point and a
23560 rendezvous point, and who uses the malleability of AES-CTR to
23561 alter the encrypted g^x portion of the INTRODUCE1 cell. We think
23562 that these attacks are infeasible (requiring the attacker to send
23563 on the order of zettabytes of altered cells in a short interval),
23564 but we'd rather block them off in case there are any classes of
23565 this attack that we missed. Reported by Willem Pinckaers.
23568 - Adjust the expiration time on our SSL session certificates to
23569 better match SSL certs seen in the wild. Resolves ticket 4014.
23570 - Change the default required uptime for a relay to be accepted as
23571 a HSDir (hidden service directory) from 24 hours to 25 hours.
23572 Improves on 0.2.0.10-alpha; resolves ticket 2649.
23573 - Add a VoteOnHidServDirectoriesV2 config option to allow directory
23574 authorities to abstain from voting on assignment of the HSDir
23575 consensus flag. Related to bug 2649.
23576 - Update to the September 6 2011 Maxmind GeoLite Country database.
23578 o Minor bugfixes (documentation and log messages):
23579 - Correct the man page to explain that HashedControlPassword and
23580 CookieAuthentication can both be set, in which case either method
23581 is sufficient to authenticate to Tor. Bugfix on 0.2.0.7-alpha,
23582 when we decided to allow these config options to both be set. Issue
23583 raised by bug 3898.
23584 - Demote the 'replay detected' log message emitted when a hidden
23585 service receives the same Diffie-Hellman public key in two different
23586 INTRODUCE2 cells to info level. A normal Tor client can cause that
23587 log message during its normal operation. Bugfix on 0.2.1.6-alpha;
23588 fixes part of bug 2442.
23589 - Demote the 'INTRODUCE2 cell is too {old,new}' log message to info
23590 level. There is nothing that a hidden service's operator can do
23591 to fix its clients' clocks. Bugfix on 0.2.1.6-alpha; fixes part
23593 - Clarify a log message specifying the characters permitted in
23594 HiddenServiceAuthorizeClient client names. Previously, the log
23595 message said that "[A-Za-z0-9+-_]" were permitted; that could have
23596 given the impression that every ASCII character between "+" and "_"
23597 was permitted. Now we say "[A-Za-z0-9+_-]". Bugfix on 0.2.1.5-alpha.
23600 - Provide a substitute implementation of lround() for MSVC, which
23601 apparently lacks it. Patch from Gisle Vanem.
23602 - Clean up some code issues that prevented Tor from building on older
23603 BSDs. Fixes bug 3894; reported by "grarpamp".
23604 - Search for a platform-specific version of "ar" when cross-compiling.
23605 Should fix builds on iOS. Resolves bug 3909, found by Marco Bonetti.
23608 Changes in version 0.2.3.3-alpha - 2011-09-01
23609 Tor 0.2.3.3-alpha adds a new "stream isolation" feature to improve Tor's
23610 security, and provides client-side support for the microdescriptor
23611 and optimistic data features introduced earlier in the 0.2.3.x
23612 series. It also includes numerous critical bugfixes in the (optional)
23613 bufferevent-based networking backend.
23615 o Major features (stream isolation):
23616 - You can now configure Tor so that streams from different
23617 applications are isolated on different circuits, to prevent an
23618 attacker who sees your streams as they leave an exit node from
23619 linking your sessions to one another. To do this, choose some way
23620 to distinguish the applications: have them connect to different
23621 SocksPorts, or have one of them use SOCKS4 while the other uses
23622 SOCKS5, or have them pass different authentication strings to the
23623 SOCKS proxy. Then, use the new SocksPort syntax to configure the
23624 degree of isolation you need. This implements Proposal 171.
23625 - There's a new syntax for specifying multiple client ports (such as
23626 SOCKSPort, TransPort, DNSPort, NATDPort): you can now just declare
23627 multiple *Port entries with full addr:port syntax on each.
23628 The old *ListenAddress format is still supported, but you can't
23629 mix it with the new *Port syntax.
23631 o Major features (other):
23632 - Enable microdescriptor fetching by default for clients. This allows
23633 clients to download a much smaller amount of directory information.
23634 To disable it (and go back to the old-style consensus and
23635 descriptors), set "UseMicrodescriptors 0" in your torrc file.
23636 - Tor's firewall-helper feature, introduced in 0.2.3.1-alpha (see the
23637 "PortForwarding" config option), now supports Windows.
23638 - When using an exit relay running 0.2.3.x, clients can now
23639 "optimistically" send data before the exit relay reports that
23640 the stream has opened. This saves a round trip when starting
23641 connections where the client speaks first (such as web browsing).
23642 This behavior is controlled by a consensus parameter (currently
23643 disabled). To turn it on or off manually, use the "OptimisticData"
23644 torrc option. Implements proposal 181; code by Ian Goldberg.
23646 o Major bugfixes (bufferevents, fixes on 0.2.3.1-alpha):
23647 - When using IOCP on Windows, we need to enable Libevent windows
23649 - The IOCP backend now works even when the user has not specified
23650 the (internal, debugging-only) _UseFilteringSSLBufferevents option.
23651 Fixes part of bug 3752.
23652 - Correctly record the bytes we've read and written when using
23653 bufferevents, so that we can include them in our bandwidth history
23654 and advertised bandwidth. Fixes bug 3803.
23655 - Apply rate-limiting only at the bottom of a chain of filtering
23656 bufferevents. This prevents us from filling up internal read
23657 buffers and violating rate-limits when filtering bufferevents
23658 are enabled. Fixes part of bug 3804.
23659 - Add high-watermarks to the output buffers for filtered
23660 bufferevents. This prevents us from filling up internal write
23661 buffers and wasting CPU cycles when filtering bufferevents are
23662 enabled. Fixes part of bug 3804.
23663 - Correctly notice when data has been written from a bufferevent
23664 without flushing it completely. Fixes bug 3805.
23665 - Fix a bug where server-side tunneled bufferevent-based directory
23666 streams would get closed prematurely. Fixes bug 3814.
23667 - Fix a use-after-free error with per-connection rate-limiting
23668 buckets. Fixes bug 3888.
23670 o Major bugfixes (also part of 0.2.2.31-rc):
23671 - If we're configured to write our ControlPorts to disk, only write
23672 them after switching UID and creating the data directory. This way,
23673 we don't fail when starting up with a nonexistent DataDirectory
23674 and a ControlPortWriteToFile setting based on that directory. Fixes
23675 bug 3747; bugfix on Tor 0.2.2.26-beta.
23678 - Added a new CONF_CHANGED event so that controllers can be notified
23679 of any configuration changes made by other controllers, or by the
23680 user. Implements ticket 1692.
23681 - Use evbuffer_copyout() in inspect_evbuffer(). This fixes a memory
23682 leak when using bufferevents, and lets Libevent worry about how to
23683 best copy data out of a buffer.
23684 - Replace files in stats/ rather than appending to them. Now that we
23685 include statistics in extra-info descriptors, it makes no sense to
23686 keep old statistics forever. Implements ticket 2930.
23688 o Minor features (build compatibility):
23689 - Limited, experimental support for building with nmake and MSVC.
23690 - Provide a substitute implementation of lround() for MSVC, which
23691 apparently lacks it. Patch from Gisle Vanem.
23693 o Minor features (also part of 0.2.2.31-rc):
23694 - Update to the August 2 2011 Maxmind GeoLite Country database.
23696 o Minor bugfixes (on 0.2.3.x-alpha):
23697 - Fix a spurious warning when parsing SOCKS requests with
23698 bufferevents enabled. Fixes bug 3615; bugfix on 0.2.3.2-alpha.
23699 - Get rid of a harmless warning that could happen on relays running
23700 with bufferevents. The warning was caused by someone doing an http
23701 request to a relay's orport. Also don't warn for a few related
23702 non-errors. Fixes bug 3700; bugfix on 0.2.3.1-alpha.
23704 o Minor bugfixes (on 2.2.x and earlier):
23705 - Correct the man page to explain that HashedControlPassword and
23706 CookieAuthentication can both be set, in which case either method
23707 is sufficient to authenticate to Tor. Bugfix on 0.2.0.7-alpha,
23708 when we decided to allow these config options to both be set. Issue
23709 raised by bug 3898.
23710 - The "--quiet" and "--hush" options now apply not only to Tor's
23711 behavior before logs are configured, but also to Tor's behavior in
23712 the absence of configured logs. Fixes bug 3550; bugfix on
23715 o Minor bugfixes (also part of 0.2.2.31-rc):
23716 - Write several files in text mode, on OSes that distinguish text
23717 mode from binary mode (namely, Windows). These files are:
23718 'buffer-stats', 'dirreq-stats', and 'entry-stats' on relays
23719 that collect those statistics; 'client_keys' and 'hostname' for
23720 hidden services that use authentication; and (in the tor-gencert
23721 utility) newly generated identity and signing keys. Previously,
23722 we wouldn't specify text mode or binary mode, leading to an
23723 assertion failure. Fixes bug 3607. Bugfix on 0.2.1.1-alpha (when
23724 the DirRecordUsageByCountry option which would have triggered
23725 the assertion failure was added), although this assertion failure
23726 would have occurred in tor-gencert on Windows in 0.2.0.1-alpha.
23727 - Selectively disable deprecation warnings on OS X because Lion
23728 started deprecating the shipped copy of openssl. Fixes bug 3643.
23729 - Remove an extra pair of quotation marks around the error
23730 message in control-port STATUS_GENERAL BUG events. Bugfix on
23731 0.1.2.6-alpha; fixes bug 3732.
23732 - When unable to format an address as a string, report its value
23733 as "???" rather than reusing the last formatted address. Bugfix
23736 o Code simplifications and refactoring:
23737 - Rewrite the listener-selection logic so that parsing which ports
23738 we want to listen on is now separate from binding to the ports
23742 - Building Tor with bufferevent support now requires Libevent
23743 2.0.13-stable or later. Previous versions of Libevent had bugs in
23744 SSL-related bufferevents and related issues that would make Tor
23745 work badly with bufferevents. Requiring 2.0.13-stable also allows
23746 Tor with bufferevents to take advantage of Libevent APIs
23747 introduced after 2.0.8-rc.
23750 Changes in version 0.2.2.32 - 2011-08-27
23751 The Tor 0.2.2 release series is dedicated to the memory of Andreas
23752 Pfitzmann (1958-2010), a pioneer in anonymity and privacy research,
23753 a founder of the PETS community, a leader in our field, a mentor,
23754 and a friend. He left us with these words: "I had the possibility
23755 to contribute to this world that is not as it should be. I hope I
23756 could help in some areas to make the world a better place, and that
23757 I could also encourage other people to be engaged in improving the
23758 world. Please, stay engaged. This world needs you, your love, your
23759 initiative -- now I cannot be part of that anymore."
23761 Tor 0.2.2.32, the first stable release in the 0.2.2 branch, is finally
23762 ready. More than two years in the making, this release features improved
23763 client performance and hidden service reliability, better compatibility
23764 for Android, correct behavior for bridges that listen on more than
23765 one address, more extensible and flexible directory object handling,
23766 better reporting of network statistics, improved code security, and
23767 many many other features and bugfixes.
23770 Changes in version 0.2.2.31-rc - 2011-08-17
23771 Tor 0.2.2.31-rc is the second and hopefully final release candidate
23772 for the Tor 0.2.2.x series.
23775 - Remove an extra pair of quotation marks around the error
23776 message in control-port STATUS_GENERAL BUG events. Bugfix on
23777 0.1.2.6-alpha; fixes bug 3732.
23778 - If we're configured to write our ControlPorts to disk, only write
23779 them after switching UID and creating the data directory. This way,
23780 we don't fail when starting up with a nonexistent DataDirectory
23781 and a ControlPortWriteToFile setting based on that directory. Fixes
23782 bug 3747; bugfix on Tor 0.2.2.26-beta.
23785 - Update to the August 2 2011 Maxmind GeoLite Country database.
23788 - Allow GETINFO fingerprint to return a fingerprint even when
23789 we have not yet built a router descriptor. Fixes bug 3577;
23790 bugfix on 0.2.0.1-alpha.
23791 - Write several files in text mode, on OSes that distinguish text
23792 mode from binary mode (namely, Windows). These files are:
23793 'buffer-stats', 'dirreq-stats', and 'entry-stats' on relays
23794 that collect those statistics; 'client_keys' and 'hostname' for
23795 hidden services that use authentication; and (in the tor-gencert
23796 utility) newly generated identity and signing keys. Previously,
23797 we wouldn't specify text mode or binary mode, leading to an
23798 assertion failure. Fixes bug 3607. Bugfix on 0.2.1.1-alpha (when
23799 the DirRecordUsageByCountry option which would have triggered
23800 the assertion failure was added), although this assertion failure
23801 would have occurred in tor-gencert on Windows in 0.2.0.1-alpha.
23802 - Selectively disable deprecation warnings on OS X because Lion
23803 started deprecating the shipped copy of openssl. Fixes bug 3643.
23804 - When unable to format an address as a string, report its value
23805 as "???" rather than reusing the last formatted address. Bugfix
23809 Changes in version 0.2.3.2-alpha - 2011-07-18
23810 Tor 0.2.3.2-alpha introduces two new experimental features:
23811 microdescriptors and pluggable transports. It also continues cleaning
23812 up a variety of recently introduced features.
23815 - Clients can now use microdescriptors instead of regular descriptors
23816 to build circuits. Microdescriptors are authority-generated
23817 summaries of regular descriptors' contents, designed to change
23818 very rarely (see proposal 158 for details). This feature is
23819 designed to save bandwidth, especially for clients on slow internet
23820 connections. It's off by default for now, since nearly no caches
23821 support it, but it will be on-by-default for clients in a future
23822 version. You can use the UseMicrodescriptors option to turn it on.
23823 - Tor clients using bridges can now be configured to use a separate
23824 'transport' proxy for each bridge. This approach helps to resist
23825 censorship by allowing bridges to use protocol obfuscation
23826 plugins. It implements part of proposal 180. Implements ticket 2841.
23827 - While we're trying to bootstrap, record how many TLS connections
23828 fail in each state, and report which states saw the most failures
23829 in response to any bootstrap failures. This feature may speed up
23830 diagnosis of censorship events. Implements ticket 3116.
23832 o Major bugfixes (on 0.2.3.1-alpha):
23833 - When configuring a large set of nodes in EntryNodes (as with
23834 'EntryNodes {cc}' or 'EntryNodes 1.1.1.1/16'), choose only a
23835 random subset to be guards, and choose them in random
23836 order. Fixes bug 2798.
23837 - Tor could crash when remembering a consensus in a non-used consensus
23838 flavor without having a current consensus set. Fixes bug 3361.
23839 - Comparing an unknown address to a microdescriptor's shortened exit
23840 policy would always give a "rejected" result. Fixes bug 3599.
23841 - Using microdescriptors as a client no longer prevents Tor from
23842 uploading and downloading hidden service descriptors. Fixes
23846 - Allow nameservers with IPv6 address. Resolves bug 2574.
23847 - Accept attempts to include a password authenticator in the
23848 handshake, as supported by SOCKS5. This handles SOCKS clients that
23849 don't know how to omit a password when authenticating. Resolves
23851 - When configuring a large set of nodes in EntryNodes, and there are
23852 enough of them listed as Guard so that we don't need to consider
23853 the non-guard entries, prefer the ones listed with the Guard flag.
23854 - Check for and recover from inconsistency in the microdescriptor
23855 cache. This will make it harder for us to accidentally free a
23856 microdescriptor without removing it from the appropriate data
23857 structures. Fixes issue 3135; issue noted by "wanoskarnet".
23858 - Log SSL state transitions at log level DEBUG, log domain
23859 HANDSHAKE. This can be useful for debugging censorship events.
23860 Implements ticket 3264.
23861 - Add port 6523 (Gobby) to LongLivedPorts. Patch by intrigeri;
23862 implements ticket 3439.
23864 o Minor bugfixes (on 0.2.3.1-alpha):
23865 - Do not free all general-purpose regular descriptors just
23866 because microdescriptor use is enabled. Fixes bug 3113.
23867 - Correctly link libevent_openssl when --enable-static-libevent
23868 is passed to configure. Fixes bug 3118.
23869 - Bridges should not complain during their heartbeat log messages that
23870 they are unlisted in the consensus: that's more or less the point
23871 of being a bridge. Fixes bug 3183.
23872 - Report a SIGNAL event to controllers when acting on a delayed
23873 SIGNAL NEWNYM command. Previously, we would report a SIGNAL
23874 event to the controller if we acted on a SIGNAL NEWNYM command
23875 immediately, and otherwise not report a SIGNAL event for the
23876 command at all. Fixes bug 3349.
23877 - Fix a crash when handling the SIGNAL controller command or
23878 reporting ERR-level status events with bufferevents enabled. Found
23879 by Robert Ransom. Fixes bug 3367.
23880 - Always ship the tor-fw-helper manpage in our release tarballs.
23881 Fixes bug 3389. Reported by Stephen Walker.
23882 - Fix a class of double-mark-for-close bugs when bufferevents
23883 are enabled. Fixes bug 3403.
23884 - Update tor-fw-helper to support libnatpmp-20110618. Fixes bug 3434.
23885 - Add SIGNAL to the list returned by the 'GETINFO events/names'
23886 control-port command. Fixes part of bug 3465.
23887 - Prevent using negative indices during unit test runs when read_all()
23888 fails. Spotted by coverity.
23889 - Fix a rare memory leak when checking the nodelist without it being
23890 present. Found by coverity.
23891 - Only try to download a microdescriptor-flavored consensus from
23892 a directory cache that provides them.
23894 o Minor bugfixes (on 0.2.2.x and earlier):
23895 - Assert that hidden-service-related operations are not performed
23896 using single-hop circuits. Previously, Tor would assert that
23897 client-side streams are not attached to single-hop circuits,
23898 but not that other sensitive operations on the client and service
23899 side are not performed using single-hop circuits. Fixes bug 3332;
23901 - Don't publish a new relay descriptor when we reload our onion key,
23902 unless the onion key has actually changed. Fixes bug 3263 and
23903 resolves another cause of bug 1810. Bugfix on 0.1.1.11-alpha.
23904 - Allow GETINFO fingerprint to return a fingerprint even when
23905 we have not yet built a router descriptor. Fixes bug 3577;
23906 bugfix on 0.2.0.1-alpha.
23907 - Make 'tor --digests' list hashes of all Tor source files. Bugfix
23908 on 0.2.2.4-alpha; fixes bug 3427.
23910 o Code simplification and refactoring:
23911 - Use tor_sscanf() in place of scanf() in more places through the
23912 code. This makes us a little more locale-independent, and
23913 should help shut up code-analysis tools that can't tell
23914 a safe sscanf string from a dangerous one.
23915 - Use tt_assert(), not tor_assert(), for checking for test failures.
23916 This makes the unit tests more able to go on in the event that
23918 - Split connection_about_to_close() into separate functions for each
23922 - On Windows, we now define the _WIN32_WINNT macros only if they
23923 are not already defined. This lets the person building Tor decide,
23924 if they want, to require a later version of Windows.
23927 Changes in version 0.2.2.30-rc - 2011-07-07
23928 Tor 0.2.2.30-rc is the first release candidate for the Tor 0.2.2.x
23929 series. It fixes a few smaller bugs, but generally appears stable.
23930 Please test it and let us know whether it is!
23933 - Send a SUCCEEDED stream event to the controller when a reverse
23934 resolve succeeded. Fixes bug 3536; bugfix on 0.0.8pre1. Issue
23935 discovered by katmagic.
23936 - Always NUL-terminate the sun_path field of a sockaddr_un before
23937 passing it to the kernel. (Not a security issue: kernels are
23938 smart enough to reject bad sockaddr_uns.) Found by Coverity;
23939 CID #428. Bugfix on Tor 0.2.0.3-alpha.
23940 - Don't stack-allocate the list of supplementary GIDs when we're
23941 about to log them. Stack-allocating NGROUPS_MAX gid_t elements
23942 could take up to 256K, which is way too much stack. Found by
23943 Coverity; CID #450. Bugfix on 0.2.1.7-alpha.
23944 - Add BUILDTIMEOUT_SET to the list returned by the 'GETINFO
23945 events/names' control-port command. Bugfix on 0.2.2.9-alpha;
23946 fixes part of bug 3465.
23947 - Fix a memory leak when receiving a descriptor for a hidden
23948 service we didn't ask for. Found by Coverity; CID #30. Bugfix
23952 - Update to the July 1 2011 Maxmind GeoLite Country database.
23955 Changes in version 0.2.2.29-beta - 2011-06-20
23956 Tor 0.2.2.29-beta reverts an accidental behavior change for users who
23957 have bridge lines in their torrc but don't want to use them; gets
23958 us closer to having the control socket feature working on Debian;
23959 and fixes a variety of smaller bugs.
23962 - Revert the UseBridges option to its behavior before 0.2.2.28-beta.
23963 When we changed the default behavior to "use bridges if any
23964 are listed in the torrc", we surprised users who had bridges
23965 in their torrc files but who didn't actually want to use them.
23966 Partial resolution for bug 3354.
23969 - Don't attach new streams to old rendezvous circuits after SIGNAL
23970 NEWNYM. Previously, we would keep using an existing rendezvous
23971 circuit if it remained open (i.e. if it were kept open by a
23972 long-lived stream, or if a new stream were attached to it before
23973 Tor could notice that it was old and no longer in use). Bugfix on
23974 0.1.1.15-rc; fixes bug 3375.
23977 - Fix a bug when using ControlSocketsGroupWritable with User. The
23978 directory's group would be checked against the current group, not
23979 the configured group. Patch by Jérémy Bobbio. Fixes bug 3393;
23980 bugfix on 0.2.2.26-beta.
23981 - Make connection_printf_to_buf()'s behavior sane. Its callers
23982 expect it to emit a CRLF iff the format string ends with CRLF;
23983 it actually emitted a CRLF iff (a) the format string ended with
23984 CRLF or (b) the resulting string was over 1023 characters long or
23985 (c) the format string did not end with CRLF *and* the resulting
23986 string was 1021 characters long or longer. Bugfix on 0.1.1.9-alpha;
23987 fixes part of bug 3407.
23988 - Make send_control_event_impl()'s behavior sane. Its callers
23989 expect it to always emit a CRLF at the end of the string; it
23990 might have emitted extra control characters as well. Bugfix on
23991 0.1.1.9-alpha; fixes another part of bug 3407.
23992 - Make crypto_rand_int() check the value of its input correctly.
23993 Previously, it accepted values up to UINT_MAX, but could return a
23994 negative number if given a value above INT_MAX+1. Found by George
23995 Kadianakis. Fixes bug 3306; bugfix on 0.2.2pre14.
23996 - Avoid a segfault when reading a malformed circuit build state
23997 with more than INT_MAX entries. Found by wanoskarnet. Bugfix on
23999 - When asked about a DNS record type we don't support via a
24000 client DNSPort, reply with NOTIMPL rather than an empty
24001 reply. Patch by intrigeri. Fixes bug 3369; bugfix on 2.0.1-alpha.
24002 - Fix a rare memory leak during stats writing. Found by coverity.
24005 - Update to the June 1 2011 Maxmind GeoLite Country database.
24007 o Code simplifications and refactoring:
24008 - Remove some dead code as indicated by coverity.
24009 - Remove a few dead assignments during router parsing. Found by
24011 - Add some forgotten return value checks during unit tests. Found
24013 - Don't use 1-bit wide signed bit fields. Found by coverity.
24016 Changes in version 0.2.2.28-beta - 2011-06-04
24017 Tor 0.2.2.28-beta makes great progress towards a new stable release: we
24018 fixed a big bug in whether relays stay in the consensus consistently,
24019 we moved closer to handling bridges and hidden services correctly,
24020 and we started the process of better handling the dreaded "my Vidalia
24021 died, and now my Tor demands a password when I try to reconnect to it"
24025 - Don't decide to make a new descriptor when receiving a HUP signal.
24026 This bug has caused a lot of 0.2.2.x relays to disappear from the
24027 consensus periodically. Fixes the most common case of triggering
24028 bug 1810; bugfix on 0.2.2.7-alpha.
24029 - Actually allow nameservers with IPv6 addresses. Fixes bug 2574.
24030 - Don't try to build descriptors if "ORPort auto" is set and we
24031 don't know our actual ORPort yet. Fix for bug 3216; bugfix on
24033 - Resolve a crash that occurred when setting BridgeRelay to 1 with
24034 accounting enabled. Fixes bug 3228; bugfix on 0.2.2.18-alpha.
24035 - Apply circuit timeouts to opened hidden-service-related circuits
24036 based on the correct start time. Previously, we would apply the
24037 circuit build timeout based on time since the circuit's creation;
24038 it was supposed to be applied based on time since the circuit
24039 entered its current state. Bugfix on 0.0.6; fixes part of bug 1297.
24040 - Use the same circuit timeout for client-side introduction
24041 circuits as for other four-hop circuits, rather than the timeout
24042 for single-hop directory-fetch circuits; the shorter timeout may
24043 have been appropriate with the static circuit build timeout in
24044 0.2.1.x and earlier, but caused many hidden service access attempts
24045 to fail with the adaptive CBT introduced in 0.2.2.2-alpha. Bugfix
24046 on 0.2.2.2-alpha; fixes another part of bug 1297.
24047 - In ticket 2511 we fixed a case where you could use an unconfigured
24048 bridge if you had configured it as a bridge the last time you ran
24049 Tor. Now fix another edge case: if you had configured it as a bridge
24050 but then switched to a different bridge via the controller, you
24051 would still be willing to use the old one. Bugfix on 0.2.0.1-alpha;
24055 - Add an __OwningControllerProcess configuration option and a
24056 TAKEOWNERSHIP control-port command. Now a Tor controller can ensure
24057 that when it exits, Tor will shut down. Implements feature 3049.
24058 - If "UseBridges 1" is set and no bridges are configured, Tor will
24059 now refuse to build any circuits until some bridges are set.
24060 If "UseBridges auto" is set, Tor will use bridges if they are
24061 configured and we are not running as a server, but otherwise will
24062 make circuits as usual. The new default is "auto". Patch by anonym,
24063 so the Tails LiveCD can stop automatically revealing you as a Tor
24067 - Fix warnings from GCC 4.6's "-Wunused-but-set-variable" option.
24068 - Remove a trailing asterisk from "exit-policy/default" in the
24069 output of the control port command "GETINFO info/names". Bugfix
24071 - Use a wide type to hold sockets when built for 64-bit Windows builds.
24073 - Warn when the user configures two HiddenServiceDir lines that point
24074 to the same directory. Bugfix on 0.0.6 (the version introducing
24075 HiddenServiceDir); fixes bug 3289.
24076 - Remove dead code from rend_cache_lookup_v2_desc_as_dir. Fixes
24077 part of bug 2748; bugfix on 0.2.0.10-alpha.
24078 - Log malformed requests for rendezvous descriptors as protocol
24079 warnings, not warnings. Also, use a more informative log message
24080 in case someone sees it at log level warning without prior
24081 info-level messages. Fixes the other part of bug 2748; bugfix
24083 - Clear the table recording the time of the last request for each
24084 hidden service descriptor from each HS directory on SIGNAL NEWNYM.
24085 Previously, we would clear our HS descriptor cache on SIGNAL
24086 NEWNYM, but if we had previously retrieved a descriptor (or tried
24087 to) from every directory responsible for it, we would refuse to
24088 fetch it again for up to 15 minutes. Bugfix on 0.2.2.25-alpha;
24090 - Fix a log message that said "bits" while displaying a value in
24091 bytes. Found by wanoskarnet. Fixes bug 3318; bugfix on
24093 - When checking for 1024-bit keys, check for 1024 bits, not 128
24094 bytes. This allows Tor to correctly discard keys of length 1017
24095 through 1023. Bugfix on 0.0.9pre5.
24098 - Relays now log the reason for publishing a new relay descriptor,
24099 so we have a better chance of hunting down instances of bug 1810.
24100 Resolves ticket 3252.
24101 - Revise most log messages that refer to nodes by nickname to
24102 instead use the "$key=nickname at address" format. This should be
24103 more useful, especially since nicknames are less and less likely
24104 to be unique. Resolves ticket 3045.
24105 - Log (at info level) when purging pieces of hidden-service-client
24106 state because of SIGNAL NEWNYM.
24109 - Remove undocumented option "-F" from tor-resolve: it hasn't done
24110 anything since 0.2.1.16-rc.
24113 Changes in version 0.2.2.27-beta - 2011-05-18
24114 Tor 0.2.2.27-beta fixes a bridge-related stability bug in the previous
24115 release, and also adds a few more general bugfixes.
24118 - Fix a crash bug when changing bridges in a running Tor process.
24119 Fixes bug 3213; bugfix on 0.2.2.26-beta.
24120 - When the controller configures a new bridge, don't wait 10 to 60
24121 seconds before trying to fetch its descriptor. Bugfix on
24122 0.2.0.3-alpha; fixes bug 3198 (suggested by 2355).
24125 - Require that onion keys have exponent 65537 in microdescriptors too.
24126 Fixes more of bug 3207; bugfix on 0.2.2.26-beta.
24127 - Tor used to limit HttpProxyAuthenticator values to 48 characters.
24128 Changed the limit to 512 characters by removing base64 newlines.
24129 Fixes bug 2752. Fix by Michael Yakubovich.
24130 - When a client starts or stops using bridges, never use a circuit
24131 that was built before the configuration change. This behavior could
24132 put at risk a user who uses bridges to ensure that her traffic
24133 only goes to the chosen addresses. Bugfix on 0.2.0.3-alpha; fixes
24137 Changes in version 0.2.2.26-beta - 2011-05-17
24138 Tor 0.2.2.26-beta fixes a variety of potential privacy problems. It
24139 also introduces a new "socksport auto" approach that should make it
24140 easier to run multiple Tors on the same system, and does a lot of
24141 cleanup to get us closer to a release candidate.
24143 o Security/privacy fixes:
24144 - Replace all potentially sensitive memory comparison operations
24145 with versions whose runtime does not depend on the data being
24146 compared. This will help resist a class of attacks where an
24147 adversary can use variations in timing information to learn
24148 sensitive data. Fix for one case of bug 3122. (Safe memcmp
24149 implementation by Robert Ransom based partially on code by DJB.)
24150 - When receiving a hidden service descriptor, check that it is for
24151 the hidden service we wanted. Previously, Tor would store any
24152 hidden service descriptors that a directory gave it, whether it
24153 wanted them or not. This wouldn't have let an attacker impersonate
24154 a hidden service, but it did let directories pre-seed a client
24155 with descriptors that it didn't want. Bugfix on 0.0.6.
24156 - On SIGHUP, do not clear out all TrackHostExits mappings, client
24157 DNS cache entries, and virtual address mappings: that's what
24158 NEWNYM is for. Fixes bug 1345; bugfix on 0.1.0.1-rc.
24161 - The options SocksPort, ControlPort, and so on now all accept a
24162 value "auto" that opens a socket on an OS-selected port. A
24163 new ControlPortWriteToFile option tells Tor to write its
24164 actual control port or ports to a chosen file. If the option
24165 ControlPortFileGroupReadable is set, the file is created as
24166 group-readable. Now users can run two Tor clients on the same
24167 system without needing to manually mess with parameters. Resolves
24168 part of ticket 3076.
24169 - Set SO_REUSEADDR on all sockets, not just listeners. This should
24170 help busy exit nodes avoid running out of useable ports just
24171 because all the ports have been used in the near past. Resolves
24175 - New "GETINFO net/listeners/(type)" controller command to return
24176 a list of addresses and ports that are bound for listeners for a
24177 given connection type. This is useful when the user has configured
24178 "SocksPort auto" and the controller needs to know which port got
24179 chosen. Resolves another part of ticket 3076.
24180 - Add a new ControlSocketsGroupWritable configuration option: when
24181 it is turned on, ControlSockets are group-writeable by the default
24182 group of the current user. Patch by Jérémy Bobbio; implements
24184 - Tor now refuses to create a ControlSocket in a directory that is
24185 world-readable (or group-readable if ControlSocketsGroupWritable
24186 is 0). This is necessary because some operating systems do not
24187 enforce permissions on an AF_UNIX sockets. Permissions on the
24188 directory holding the socket, however, seems to work everywhere.
24189 - Rate-limit a warning about failures to download v2 networkstatus
24190 documents. Resolves part of bug 1352.
24191 - Backport code from 0.2.3.x that allows directory authorities to
24192 clean their microdescriptor caches. Needed to resolve bug 2230.
24193 - When an HTTPS proxy reports "403 Forbidden", we now explain
24194 what it means rather than calling it an unexpected status code.
24195 Closes bug 2503. Patch from Michael Yakubovich.
24196 - Update to the May 1 2011 Maxmind GeoLite Country database.
24199 - Authorities now clean their microdesc cache periodically and when
24200 reading from disk initially, not only when adding new descriptors.
24201 This prevents a bug where we could lose microdescriptors. Bugfix
24202 on 0.2.2.6-alpha. Fixes bug 2230.
24203 - Do not crash when our configuration file becomes unreadable, for
24204 example due to a permissions change, between when we start up
24205 and when a controller calls SAVECONF. Fixes bug 3135; bugfix
24207 - Avoid a bug that would keep us from replacing a microdescriptor
24208 cache on Windows. (We would try to replace the file while still
24209 holding it open. That's fine on Unix, but Windows doesn't let us
24210 do that.) Bugfix on 0.2.2.6-alpha; bug found by wanoskarnet.
24211 - Add missing explanations for the authority-related torrc options
24212 RephistTrackTime, BridgePassword, and V3AuthUseLegacyKey in the
24213 man page. Resolves issue 2379.
24214 - As an authority, do not upload our own vote or signature set to
24215 ourself. It would tell us nothing new, and as of 0.2.2.24-alpha,
24216 it would get flagged as a duplicate. Resolves bug 3026.
24217 - Accept hidden service descriptors if we think we might be a hidden
24218 service directory, regardless of what our consensus says. This
24219 helps robustness, since clients and hidden services can sometimes
24220 have a more up-to-date view of the network consensus than we do,
24221 and if they think that the directory authorities list us a HSDir,
24222 we might actually be one. Related to bug 2732; bugfix on
24224 - When a controller changes TrackHostExits, remove mappings for
24225 hosts that should no longer have their exits tracked. Bugfix on
24227 - When a controller changes VirtualAddrNetwork, remove any mappings
24228 for hosts that were automapped to the old network. Bugfix on
24230 - When a controller changes one of the AutomapHosts* options, remove
24231 any mappings for hosts that should no longer be automapped. Bugfix
24233 - Do not reset the bridge descriptor download status every time we
24234 re-parse our configuration or get a configuration change. Fixes
24235 bug 3019; bugfix on 0.2.0.3-alpha.
24237 o Minor bugfixes (code cleanup):
24238 - When loading the microdesc journal, remember its current size.
24239 In 0.2.2, this helps prevent the microdesc journal from growing
24240 without limit on authorities (who are the only ones to use it in
24241 0.2.2). Fixes a part of bug 2230; bugfix on 0.2.2.6-alpha.
24242 Fix posted by "cypherpunks."
24243 - The microdesc journal is supposed to get rebuilt only if it is
24244 at least _half_ the length of the store, not _twice_ the length
24245 of the store. Bugfix on 0.2.2.6-alpha; fixes part of bug 2230.
24246 - Fix a potential null-pointer dereference while computing a
24247 consensus. Bugfix on 0.2.0.3-alpha, found with the help of
24249 - Avoid a possible null-pointer dereference when rebuilding the mdesc
24250 cache without actually having any descriptors to cache. Bugfix on
24251 0.2.2.6-alpha. Issue discovered using clang's static analyzer.
24252 - If we fail to compute the identity digest of a v3 legacy keypair,
24253 warn, and don't use a buffer-full of junk instead. Bugfix on
24254 0.2.1.1-alpha; fixes bug 3106.
24255 - Resolve an untriggerable issue in smartlist_string_num_isin(),
24256 where if the function had ever in the future been used to check
24257 for the presence of a too-large number, it would have given an
24258 incorrect result. (Fortunately, we only used it for 16-bit
24259 values.) Fixes bug 3175; bugfix on 0.1.0.1-rc.
24260 - Require that introduction point keys and onion handshake keys
24261 have a public exponent of 65537. Starts to fix bug 3207; bugfix
24264 o Removed features:
24265 - Caches no longer download and serve v2 networkstatus documents
24266 unless FetchV2Networkstatus flag is set: these documents haven't
24267 haven't been used by clients or relays since 0.2.0.x. Resolves
24271 Changes in version 0.2.3.1-alpha - 2011-05-05
24272 Tor 0.2.3.1-alpha adds some new experimental features, including support
24273 for an improved network IO backend, IOCP networking on Windows,
24274 microdescriptor caching, "fast-start" support for streams, and automatic
24275 home router configuration. There are also numerous internal improvements
24276 to try to make the code easier for developers to work with.
24278 This is the first alpha release in a new series, so expect there to be
24279 bugs. Users who would rather test out a more stable branch should
24280 stay with 0.2.2.x for now.
24283 - Tor can now optionally build with the "bufferevents" buffered IO
24284 backend provided by Libevent 2. To use this feature, make sure you
24285 have the latest possible version of Libevent, and pass the
24286 --enable-bufferevents flag to configure when building Tor from
24287 source. This feature will make our networking code more flexible,
24288 let us stack layers on each other, and let us use more efficient
24289 zero-copy transports where available.
24290 - As an experimental feature, Tor can use IOCP for networking on Windows.
24291 Once this code is tuned and optimized, it promises much better
24292 performance than the select-based backend we've used in the past. To
24293 try this feature, you must build Tor with Libevent 2, configure Tor
24294 with the "bufferevents" buffered IO backend, and add "DisableIOCP 0" to
24295 your torrc. There are known bugs here: only try this if you can help
24296 debug it as it breaks.
24297 - The EntryNodes option can now include country codes like {de} or IP
24298 addresses or network masks. Previously we had disallowed these options
24299 because we didn't have an efficient way to keep the list up to
24300 date. Fixes bug 1982, but see bug 2798 for an unresolved issue here.
24301 - Exit nodes now accept and queue data on not-yet-connected streams.
24302 Previously, the client wasn't allowed to send data until the stream was
24303 connected, which slowed down all connections. This change will enable
24304 clients to perform a "fast-start" on streams and send data without
24305 having to wait for a confirmation that the stream has opened. (Patch
24306 from Ian Goldberg; implements the server side of Proposal 174.)
24307 - Tor now has initial support for automatic port mapping on the many
24308 home routers that support NAT-PMP or UPnP. (Not yet supported on
24309 Windows). To build the support code, you'll need to have libnatpnp
24310 library and/or the libminiupnpc library, and you'll need to enable the
24311 feature specifically by passing "--enable-upnp" and/or
24312 "--enable-natpnp" to configure. To turn it on, use the new
24313 PortForwarding option.
24314 - Caches now download, cache, and serve multiple "flavors" of the
24315 consensus, including a flavor that describes microdescriptors.
24316 - Caches now download, cache, and serve microdescriptors -- small
24317 summaries of router descriptors that are authenticated by all of the
24318 directory authorities. Once enough caches are running this code,
24319 clients will be able to save significant amounts of directory bandwidth
24320 by downloading microdescriptors instead of router descriptors.
24323 - Make logging resolution configurable with a new LogTimeGranularity
24324 option, and change the default from 1 millisecond to 1 second.
24325 Implements enhancement 1668.
24326 - We log which torrc file we're using on startup. Implements ticket
24328 - Ordinarily, Tor does not count traffic from private addresses (like
24329 127.0.0.1 or 10.0.0.1) when calculating rate limits or accounting.
24330 There is now a new option, CountPrivateBandwidth, to disable this
24331 behavior. Patch from Daniel Cagara.
24332 - New --enable-static-tor configure option for building Tor as
24333 statically as possible. Idea, general hackery and thoughts from
24334 Alexei Czeskis, John Gilmore, Jacob Appelbaum. Implements ticket
24336 - If you set the NumCPUs option to 0, Tor will now try to detect how
24337 many CPUs you have. This is the new default behavior.
24338 - Turn on directory request statistics by default and include them in
24339 extra-info descriptors. Don't break if we have no GeoIP database.
24340 - Relays that set "ConnDirectionStatistics 1" write statistics on the
24341 bidirectional use of connections to disk every 24 hours.
24342 - Add a GeoIP file digest to the extra-info descriptor. Implements
24344 - The NodeFamily option -- which let you declare that you want to
24345 consider nodes to be part of a family whether they list themselves
24346 that way or not -- now allows IP address ranges and country codes.
24347 - Add a new 'Heartbeat' log message type to periodically log a message
24348 describing Tor's status at level Notice. This feature is meant for
24349 operators who log at notice, and want to make sure that their Tor
24350 server is still working. Implementation by George Kadianakis.
24352 o Minor bugfixes (on 0.2.2.25-alpha):
24353 - When loading the microdesc journal, remember its current size.
24354 In 0.2.2, this helps prevent the microdesc journal from growing
24355 without limit on authorities (who are the only ones to use it in
24356 0.2.2). Fixes a part of bug 2230; bugfix on 0.2.2.6-alpha.
24357 Fix posted by "cypherpunks."
24358 - The microdesc journal is supposed to get rebuilt only if it is
24359 at least _half_ the length of the store, not _twice_ the length
24360 of the store. Bugfix on 0.2.2.6-alpha; fixes part of bug 2230.
24361 - If as an authority we fail to compute the identity digest of a v3
24362 legacy keypair, warn, and don't use a buffer-full of junk instead.
24363 Bugfix on 0.2.1.1-alpha; fixes bug 3106.
24364 - Authorities now clean their microdesc cache periodically and when
24365 reading from disk initially, not only when adding new descriptors.
24366 This prevents a bug where we could lose microdescriptors. Bugfix
24369 o Minor features (controller):
24370 - Add a new SIGNAL event to the controller interface so that
24371 controllers can be notified when Tor handles a signal. Resolves
24372 issue 1955. Patch by John Brooks.
24373 - Add a new GETINFO option to get total bytes read and written. Patch
24374 from pipe, revised by atagar. Resolves ticket 2345.
24375 - Implement some GETINFO controller fields to provide information about
24376 the Tor process's pid, euid, username, and resource limits.
24379 - Our build system requires automake 1.6 or later to create the
24380 Makefile.in files. Previously, you could have used 1.4.
24381 This only affects developers and people building Tor from git;
24382 people who build Tor from the source distribution without changing
24383 the Makefile.am files should be fine.
24384 - Our autogen.sh script uses autoreconf to launch autoconf, automake, and
24385 so on. This is more robust against some of the failure modes
24386 associated with running the autotools pieces on their own.
24388 o Minor packaging issues:
24389 - On OpenSUSE, create the /var/run/tor directory on startup if it is not
24390 already created. Patch from Andreas Stieger. Fixes bug 2573.
24392 o Code simplifications and refactoring:
24393 - A major revision to our internal node-selecting and listing logic.
24394 Tor already had at least two major ways to look at the question of
24395 "which Tor servers do we know about": a list of router descriptors,
24396 and a list of entries in the current consensus. With
24397 microdescriptors, we're adding a third. Having so many systems
24398 without an abstraction layer over them was hurting the codebase.
24399 Now, we have a new "node_t" abstraction that presents a consistent
24400 interface to a client's view of a Tor node, and holds (nearly) all
24401 of the mutable state formerly in routerinfo_t and routerstatus_t.
24402 - The helper programs tor-gencert, tor-resolve, and tor-checkkey
24403 no longer link against Libevent: they never used it, but
24404 our library structure used to force them to link it.
24406 o Removed features:
24407 - Remove some old code to work around even older versions of Tor that
24408 used forked processes to handle DNS requests. Such versions of Tor
24409 are no longer in use as servers.
24411 o Documentation fixes:
24412 - Correct a broken faq link in the INSTALL file. Fixes bug 2307.
24413 - Add missing documentation for the authority-related torrc options
24414 RephistTrackTime, BridgePassword, and V3AuthUseLegacyKey. Resolves
24418 Changes in version 0.2.2.25-alpha - 2011-04-29
24419 Tor 0.2.2.25-alpha fixes many bugs: hidden service clients are more
24420 robust, routers no longer overreport their bandwidth, Win7 should crash
24421 a little less, and NEWNYM (as used by Vidalia's "new identity" button)
24422 now prevents hidden service-related activity from being linkable. It
24423 provides more information to Vidalia so you can see if your bridge is
24424 working. Also, 0.2.2.25-alpha revamps the Entry/Exit/ExcludeNodes and
24425 StrictNodes configuration options to make them more reliable, more
24426 understandable, and more regularly applied. If you use those options,
24427 please see the revised documentation for them in the manual page.
24430 - Relays were publishing grossly inflated bandwidth values because
24431 they were writing their state files wrong--now they write the
24432 correct value. Also, resume reading bandwidth history from the
24433 state file correctly. Fixes bug 2704; bugfix on 0.2.2.23-alpha.
24434 - Improve hidden service robustness: When we find that we have
24435 extended a hidden service's introduction circuit to a relay not
24436 listed as an introduction point in the HS descriptor we currently
24437 have, retry with an introduction point from the current
24438 descriptor. Previously we would just give up. Fixes bugs 1024 and
24439 1930; bugfix on 0.2.0.10-alpha.
24440 - Clients now stop trying to use an exit node associated with a given
24441 destination by TrackHostExits if they fail to reach that exit node.
24442 Fixes bug 2999. Bugfix on 0.2.0.20-rc.
24443 - Fix crash bug on platforms where gmtime and localtime can return
24444 NULL. Windows 7 users were running into this one. Fixes part of bug
24445 2077. Bugfix on all versions of Tor. Found by boboper.
24447 o Security and stability fixes:
24448 - Don't double-free a parsable, but invalid, microdescriptor, even if
24449 it is followed in the blob we're parsing by an unparsable
24450 microdescriptor. Fixes an issue reported in a comment on bug 2954.
24451 Bugfix on 0.2.2.6-alpha; fix by "cypherpunks".
24452 - If the Nickname configuration option isn't given, Tor would pick a
24453 nickname based on the local hostname as the nickname for a relay.
24454 Because nicknames are not very important in today's Tor and the
24455 "Unnamed" nickname has been implemented, this is now problematic
24456 behavior: It leaks information about the hostname without being
24457 useful at all. Fixes bug 2979; bugfix on 0.1.2.2-alpha, which
24458 introduced the Unnamed nickname. Reported by tagnaq.
24459 - Fix an uncommon assertion failure when running with DNSPort under
24460 heavy load. Fixes bug 2933; bugfix on 0.2.0.1-alpha.
24461 - Avoid linkability based on cached hidden service descriptors: forget
24462 all hidden service descriptors cached as a client when processing a
24463 SIGNAL NEWNYM command. Fixes bug 3000; bugfix on 0.0.6.
24466 - Export GeoIP information on bridge usage to controllers even if we
24467 have not yet been running for 24 hours. Now Vidalia bridge operators
24468 can get more accurate and immediate feedback about their
24469 contributions to the network.
24471 o Major features and bugfixes (node selection):
24472 - Revise and reconcile the meaning of the ExitNodes, EntryNodes,
24473 ExcludeEntryNodes, ExcludeExitNodes, ExcludeNodes, and StrictNodes
24474 options. Previously, we had been ambiguous in describing what
24475 counted as an "exit" node, and what operations exactly "StrictNodes
24476 0" would permit. This created confusion when people saw nodes built
24477 through unexpected circuits, and made it hard to tell real bugs from
24478 surprises. Now the intended behavior is:
24479 . "Exit", in the context of ExitNodes and ExcludeExitNodes, means
24480 a node that delivers user traffic outside the Tor network.
24481 . "Entry", in the context of EntryNodes, means a node used as the
24482 first hop of a multihop circuit. It doesn't include direct
24483 connections to directory servers.
24484 . "ExcludeNodes" applies to all nodes.
24485 . "StrictNodes" changes the behavior of ExcludeNodes only. When
24486 StrictNodes is set, Tor should avoid all nodes listed in
24487 ExcludeNodes, even when it will make user requests fail. When
24488 StrictNodes is *not* set, then Tor should follow ExcludeNodes
24489 whenever it can, except when it must use an excluded node to
24490 perform self-tests, connect to a hidden service, provide a
24491 hidden service, fulfill a .exit request, upload directory
24492 information, or fetch directory information.
24493 Collectively, the changes to implement the behavior fix bug 1090.
24494 - ExcludeNodes now takes precedence over EntryNodes and ExitNodes: if
24495 a node is listed in both, it's treated as excluded.
24496 - ExcludeNodes now applies to directory nodes -- as a preference if
24497 StrictNodes is 0, or an absolute requirement if StrictNodes is 1.
24498 Don't exclude all the directory authorities and set StrictNodes to 1
24499 unless you really want your Tor to break.
24500 - ExcludeNodes and ExcludeExitNodes now override exit enclaving.
24501 - ExcludeExitNodes now overrides .exit requests.
24502 - We don't use bridges listed in ExcludeNodes.
24503 - When StrictNodes is 1:
24504 . We now apply ExcludeNodes to hidden service introduction points
24505 and to rendezvous points selected by hidden service users. This
24506 can make your hidden service less reliable: use it with caution!
24507 . If we have used ExcludeNodes on ourself, do not try relay
24508 reachability self-tests.
24509 . If we have excluded all the directory authorities, we will not
24510 even try to upload our descriptor if we're a relay.
24511 . Do not honor .exit requests to an excluded node.
24512 - Remove a misfeature that caused us to ignore the Fast/Stable flags
24513 when ExitNodes is set. Bugfix on 0.2.2.7-alpha.
24514 - When the set of permitted nodes changes, we now remove any mappings
24515 introduced via TrackExitHosts to now-excluded nodes. Bugfix on
24517 - We never cannibalize a circuit that had excluded nodes on it, even
24518 if StrictNodes is 0. Bugfix on 0.1.0.1-rc.
24519 - Revert a change where we would be laxer about attaching streams to
24520 circuits than when building the circuits. This was meant to prevent
24521 a set of bugs where streams were never attachable, but our improved
24522 code here should make this unnecessary. Bugfix on 0.2.2.7-alpha.
24523 - Keep track of how many times we launch a new circuit to handle a
24524 given stream. Too many launches could indicate an inconsistency
24525 between our "launch a circuit to handle this stream" logic and our
24526 "attach this stream to one of the available circuits" logic.
24527 - Improve log messages related to excluded nodes.
24530 - Fix a spurious warning when moving from a short month to a long
24531 month on relays with month-based BandwidthAccounting. Bugfix on
24532 0.2.2.17-alpha; fixes bug 3020.
24533 - When a client finds that an origin circuit has run out of 16-bit
24534 stream IDs, we now mark it as unusable for new streams. Previously,
24535 we would try to close the entire circuit. Bugfix on 0.0.6.
24536 - Add a forgotten cast that caused a compile warning on OS X 10.6.
24537 Bugfix on 0.2.2.24-alpha.
24538 - Be more careful about reporting the correct error from a failed
24539 connect() system call. Under some circumstances, it was possible to
24540 look at an incorrect value for errno when sending the end reason.
24541 Bugfix on 0.1.0.1-rc.
24542 - Correctly handle an "impossible" overflow cases in connection byte
24543 counting, where we write or read more than 4GB on an edge connection
24544 in a single second. Bugfix on 0.1.2.8-beta.
24545 - Correct the warning displayed when a rendezvous descriptor exceeds
24546 the maximum size. Fixes bug 2750; bugfix on 0.2.1.5-alpha. Found by
24548 - Clients and hidden services now use HSDir-flagged relays for hidden
24549 service descriptor downloads and uploads even if the relays have no
24550 DirPort set and the client has disabled TunnelDirConns. This will
24551 eventually allow us to give the HSDir flag to relays with no
24552 DirPort. Fixes bug 2722; bugfix on 0.2.1.6-alpha.
24553 - Downgrade "no current certificates known for authority" message from
24554 Notice to Info. Fixes bug 2899; bugfix on 0.2.0.10-alpha.
24555 - Make the SIGNAL DUMP control-port command work on FreeBSD. Fixes bug
24556 2917. Bugfix on 0.1.1.1-alpha.
24557 - Only limit the lengths of single HS descriptors, even when multiple
24558 HS descriptors are published to an HSDir relay in a single POST
24559 operation. Fixes bug 2948; bugfix on 0.2.1.5-alpha. Found by hsdir.
24560 - Write the current time into the LastWritten line in our state file,
24561 rather than the time from the previous write attempt. Also, stop
24562 trying to use a time of -1 in our log statements. Fixes bug 3039;
24563 bugfix on 0.2.2.14-alpha.
24564 - Be more consistent in our treatment of file system paths. "~" should
24565 get expanded to the user's home directory in the Log config option.
24566 Fixes bug 2971; bugfix on 0.2.0.1-alpha, which introduced the
24567 feature for the -f and --DataDirectory options.
24570 - Make sure every relay writes a state file at least every 12 hours.
24571 Previously, a relay could go for weeks without writing its state
24572 file, and on a crash could lose its bandwidth history, capacity
24573 estimates, client country statistics, and so on. Addresses bug 3012.
24574 - Send END_STREAM_REASON_NOROUTE in response to EHOSTUNREACH errors.
24575 Clients before 0.2.1.27 didn't handle NOROUTE correctly, but such
24576 clients are already deprecated because of security bugs.
24577 - Don't allow v0 hidden service authorities to act as clients.
24578 Required by fix for bug 3000.
24579 - Ignore SIGNAL NEWNYM commands on relay-only Tor instances. Required
24580 by fix for bug 3000.
24581 - Ensure that no empty [dirreq-](read|write)-history lines are added
24582 to an extrainfo document. Implements ticket 2497.
24584 o Code simplification and refactoring:
24585 - Remove workaround code to handle directory responses from servers
24586 that had bug 539 (they would send HTTP status 503 responses _and_
24587 send a body too). Since only server versions before
24588 0.2.0.16-alpha/0.1.2.19 were affected, there is no longer reason to
24589 keep the workaround in place.
24590 - Remove the old 'fuzzy time' logic. It was supposed to be used for
24591 handling calculations where we have a known amount of clock skew and
24592 an allowed amount of unknown skew. But we only used it in three
24593 places, and we never adjusted the known/unknown skew values. This is
24594 still something we might want to do someday, but if we do, we'll
24595 want to do it differently.
24596 - Avoid signed/unsigned comparisons by making SIZE_T_CEILING unsigned.
24597 None of the cases where we did this before were wrong, but by making
24598 this change we avoid warnings. Fixes bug 2475; bugfix on 0.2.1.28.
24599 - Use GetTempDir to find the proper temporary directory location on
24600 Windows when generating temporary files for the unit tests. Patch by
24604 Changes in version 0.2.2.24-alpha - 2011-04-08
24605 Tor 0.2.2.24-alpha fixes a variety of bugs, including a big bug that
24606 prevented Tor clients from effectively using "multihomed" bridges,
24607 that is, bridges that listen on multiple ports or IP addresses so users
24608 can continue to use some of their addresses even if others get blocked.
24611 - Fix a bug where bridge users who configure the non-canonical
24612 address of a bridge automatically switch to its canonical
24613 address. If a bridge listens at more than one address, it should be
24614 able to advertise those addresses independently and any non-blocked
24615 addresses should continue to work. Bugfix on Tor 0.2.0.x. Fixes
24617 - If you configured Tor to use bridge A, and then quit and
24618 configured Tor to use bridge B instead, it would happily continue
24619 to use bridge A if it's still reachable. While this behavior is
24620 a feature if your goal is connectivity, in some scenarios it's a
24621 dangerous bug. Bugfix on Tor 0.2.0.1-alpha; fixes bug 2511.
24622 - Directory authorities now use data collected from their own
24623 uptime observations when choosing whether to assign the HSDir flag
24624 to relays, instead of trusting the uptime value the relay reports in
24625 its descriptor. This change helps prevent an attack where a small
24626 set of nodes with frequently-changing identity keys can blackhole
24627 a hidden service. (Only authorities need upgrade; others will be
24628 fine once they do.) Bugfix on 0.2.0.10-alpha; fixes bug 2709.
24631 - When we restart our relay, we might get a successful connection
24632 from the outside before we've started our reachability tests,
24633 triggering a warning: "ORPort found reachable, but I have no
24634 routerinfo yet. Failing to inform controller of success." This
24635 bug was harmless unless Tor is running under a controller
24636 like Vidalia, in which case the controller would never get a
24637 REACHABILITY_SUCCEEDED status event. Bugfix on 0.1.2.6-alpha;
24639 - Make directory authorities more accurate at recording when
24640 relays that have failed several reachability tests became
24641 unreachable, so we can provide more accuracy at assigning Stable,
24642 Guard, HSDir, etc flags. Bugfix on 0.2.0.6-alpha. Resolves bug 2716.
24643 - Fix an issue that prevented static linking of libevent on
24644 some platforms (notably Linux). Fixes bug 2698; bugfix on
24645 versions 0.2.1.23/0.2.2.8-alpha (the versions introducing
24646 the --with-static-libevent configure option).
24647 - We now ask the other side of a stream (the client or the exit)
24648 for more data on that stream when the amount of queued data on
24649 that stream dips low enough. Previously, we wouldn't ask the
24650 other side for more data until either it sent us more data (which
24651 it wasn't supposed to do if it had exhausted its window!) or we
24652 had completely flushed all our queued data. This flow control fix
24653 should improve throughput. Fixes bug 2756; bugfix on the earliest
24654 released versions of Tor (svn commit r152).
24655 - Avoid a double-mark-for-free warning when failing to attach a
24656 transparent proxy connection. (We thought we had fixed this in
24657 0.2.2.23-alpha, but it turns out our fix was checking the wrong
24658 connection.) Fixes bug 2757; bugfix on 0.1.2.1-alpha (the original
24659 bug) and 0.2.2.23-alpha (the incorrect fix).
24660 - When warning about missing zlib development packages during compile,
24661 give the correct package names. Bugfix on 0.2.0.1-alpha.
24664 - Directory authorities now log the source of a rejected POSTed v3
24665 networkstatus vote.
24666 - Make compilation with clang possible when using
24667 --enable-gcc-warnings by removing two warning options that clang
24668 hasn't implemented yet and by fixing a few warnings. Implements
24670 - When expiring circuits, use microsecond timers rather than
24671 one-second timers. This can avoid an unpleasant situation where a
24672 circuit is launched near the end of one second and expired right
24673 near the beginning of the next, and prevent fluctuations in circuit
24675 - Use computed circuit-build timeouts to decide when to launch
24676 parallel introduction circuits for hidden services. (Previously,
24677 we would retry after 15 seconds.)
24678 - Update to the April 1 2011 Maxmind GeoLite Country database.
24681 - Create the /var/run/tor directory on startup on OpenSUSE if it is
24682 not already created. Patch from Andreas Stieger. Fixes bug 2573.
24684 o Documentation changes:
24685 - Modernize the doxygen configuration file slightly. Fixes bug 2707.
24686 - Resolve all doxygen warnings except those for missing documentation.
24688 - Add doxygen documentation for more functions, fields, and types.
24691 Changes in version 0.2.2.23-alpha - 2011-03-08
24692 Tor 0.2.2.23-alpha lets relays record their bandwidth history so when
24693 they restart they don't lose their bandwidth capacity estimate. This
24694 release also fixes a diverse set of user-facing bugs, ranging from
24695 relays overrunning their rate limiting to clients falsely warning about
24696 clock skew to bridge descriptor leaks by our bridge directory authority.
24699 - Stop sending a CLOCK_SKEW controller status event whenever
24700 we fetch directory information from a relay that has a wrong clock.
24701 Instead, only inform the controller when it's a trusted authority
24702 that claims our clock is wrong. Bugfix on 0.1.2.6-alpha; fixes
24703 the rest of bug 1074.
24704 - Fix an assert in parsing router descriptors containing IPv6
24705 addresses. This one took down the directory authorities when
24706 somebody tried some experimental code. Bugfix on 0.2.1.3-alpha.
24707 - Make the bridge directory authority refuse to answer directory
24708 requests for "all" descriptors. It used to include bridge
24709 descriptors in its answer, which was a major information leak.
24710 Found by "piebeer". Bugfix on 0.2.0.3-alpha.
24711 - If relays set RelayBandwidthBurst but not RelayBandwidthRate,
24712 Tor would ignore their RelayBandwidthBurst setting,
24713 potentially using more bandwidth than expected. Bugfix on
24714 0.2.0.1-alpha. Reported by Paul Wouters. Fixes bug 2470.
24715 - Ignore and warn if the user mistakenly sets "PublishServerDescriptor
24716 hidserv" in her torrc. The 'hidserv' argument never controlled
24717 publication of hidden service descriptors. Bugfix on 0.2.0.1-alpha.
24720 - Relays now save observed peak bandwidth throughput rates to their
24721 state file (along with total usage, which was already saved)
24722 so that they can determine their correct estimated bandwidth on
24723 restart. Resolves bug 1863, where Tor relays would reset their
24724 estimated bandwidth to 0 after restarting.
24725 - Directory authorities now take changes in router IP address and
24726 ORPort into account when determining router stability. Previously,
24727 if a router changed its IP or ORPort, the authorities would not
24728 treat it as having any downtime for the purposes of stability
24729 calculation, whereas clients would experience downtime since the
24730 change could take a while to propagate to them. Resolves issue 1035.
24731 - Enable Address Space Layout Randomization (ASLR) and Data Execution
24732 Prevention (DEP) by default on Windows to make it harder for
24733 attackers to exploit vulnerabilities. Patch from John Brooks.
24735 o Minor bugfixes (on 0.2.1.x and earlier):
24736 - Fix a rare crash bug that could occur when a client was configured
24737 with a large number of bridges. Fixes bug 2629; bugfix on
24738 0.2.1.2-alpha. Bugfix by trac user "shitlei".
24739 - Avoid a double mark-for-free warning when failing to attach a
24740 transparent proxy connection. Bugfix on 0.1.2.1-alpha. Fixes
24742 - Correctly detect failure to allocate an OpenSSL BIO. Fixes bug 2378;
24743 found by "cypherpunks". This bug was introduced before the first
24744 Tor release, in svn commit r110.
24745 - Country codes aren't supported in EntryNodes until 0.2.3.x, so
24746 don't mention them in the manpage. Fixes bug 2450; issue
24747 spotted by keb and G-Lo.
24748 - Fix a bug in bandwidth history state parsing that could have been
24749 triggered if a future version of Tor ever changed the timing
24750 granularity at which bandwidth history is measured. Bugfix on
24751 Tor 0.1.1.11-alpha.
24752 - When a relay decides that its DNS is too broken for it to serve
24753 as an exit server, it advertised itself as a non-exit, but
24754 continued to act as an exit. This could create accidental
24755 partitioning opportunities for users. Instead, if a relay is
24756 going to advertise reject *:* as its exit policy, it should
24757 really act with exit policy "reject *:*". Fixes bug 2366.
24758 Bugfix on Tor 0.1.2.5-alpha. Bugfix by user "postman" on trac.
24759 - In the special case where you configure a public exit relay as your
24760 bridge, Tor would be willing to use that exit relay as the last
24761 hop in your circuit as well. Now we fail that circuit instead.
24762 Bugfix on 0.2.0.12-alpha. Fixes bug 2403. Reported by "piebeer".
24763 - Fix a bug with our locking implementation on Windows that couldn't
24764 correctly detect when a file was already locked. Fixes bug 2504,
24765 bugfix on 0.2.1.6-alpha.
24766 - Fix IPv6-related connect() failures on some platforms (BSD, OS X).
24767 Bugfix on 0.2.0.3-alpha; fixes first part of bug 2660. Patch by
24769 - Set target port in get_interface_address6() correctly. Bugfix
24770 on 0.1.1.4-alpha and 0.2.0.3-alpha; fixes second part of bug 2660.
24771 - Directory authorities are now more robust to hops back in time
24772 when calculating router stability. Previously, if a run of uptime
24773 or downtime appeared to be negative, the calculation could give
24774 incorrect results. Bugfix on 0.2.0.6-alpha; noticed when fixing
24776 - Fix an assert that got triggered when using the TestingTorNetwork
24777 configuration option and then issuing a GETINFO config-text control
24778 command. Fixes bug 2250; bugfix on 0.2.1.2-alpha.
24780 o Minor bugfixes (on 0.2.2.x):
24781 - Clients should not weight BadExit nodes as Exits in their node
24782 selection. Similarly, directory authorities should not count BadExit
24783 bandwidth as Exit bandwidth when computing bandwidth-weights.
24784 Bugfix on 0.2.2.10-alpha; fixes bug 2203.
24785 - Correctly clear our dir_read/dir_write history when there is an
24786 error parsing any bw history value from the state file. Bugfix on
24787 Tor 0.2.2.15-alpha.
24788 - Resolve a bug in verifying signatures of directory objects
24789 with digests longer than SHA1. Bugfix on 0.2.2.20-alpha.
24790 Fixes bug 2409. Found by "piebeer".
24791 - Bridge authorities no longer crash on SIGHUP when they try to
24792 publish their relay descriptor to themselves. Fixes bug 2572. Bugfix
24796 - Log less aggressively about circuit timeout changes, and improve
24797 some other circuit timeout messages. Resolves bug 2004.
24798 - Log a little more clearly about the times at which we're no longer
24799 accepting new connections. Resolves bug 2181.
24800 - Reject attempts at the client side to open connections to private
24801 IP addresses (like 127.0.0.1, 10.0.0.1, and so on) with
24802 a randomly chosen exit node. Attempts to do so are always
24803 ill-defined, generally prevented by exit policies, and usually
24804 in error. This will also help to detect loops in transparent
24805 proxy configurations. You can disable this feature by setting
24806 "ClientRejectInternalAddresses 0" in your torrc.
24807 - Always treat failure to allocate an RSA key as an unrecoverable
24809 - Update to the March 1 2011 Maxmind GeoLite Country database.
24811 o Minor features (log subsystem):
24812 - Add documentation for configuring logging at different severities in
24813 different log domains. We've had this feature since 0.2.1.1-alpha,
24814 but for some reason it never made it into the manpage. Fixes
24816 - Make it simpler to specify "All log domains except for A and B".
24817 Previously you needed to say "[*,~A,~B]". Now you can just say
24819 - Add a "LogMessageDomains 1" option to include the domains of log
24820 messages along with the messages. Without this, there's no way
24821 to use log domains without reading the source or doing a lot
24824 o Packaging changes:
24825 - Stop shipping the Tor specs files and development proposal documents
24826 in the tarball. They are now in a separate git repository at
24827 git://git.torproject.org/torspec.git
24830 Changes in version 0.2.1.30 - 2011-02-23
24831 Tor 0.2.1.30 fixes a variety of less critical bugs. The main other
24832 change is a slight tweak to Tor's TLS handshake that makes relays
24833 and bridges that run this new version reachable from Iran again.
24834 We don't expect this tweak will win the arms race long-term, but it
24835 buys us time until we roll out a better solution.
24838 - Stop sending a CLOCK_SKEW controller status event whenever
24839 we fetch directory information from a relay that has a wrong clock.
24840 Instead, only inform the controller when it's a trusted authority
24841 that claims our clock is wrong. Bugfix on 0.1.2.6-alpha; fixes
24842 the rest of bug 1074.
24843 - Fix a bounds-checking error that could allow an attacker to
24844 remotely crash a directory authority. Bugfix on 0.2.1.5-alpha.
24845 Found by "piebeer".
24846 - If relays set RelayBandwidthBurst but not RelayBandwidthRate,
24847 Tor would ignore their RelayBandwidthBurst setting,
24848 potentially using more bandwidth than expected. Bugfix on
24849 0.2.0.1-alpha. Reported by Paul Wouters. Fixes bug 2470.
24850 - Ignore and warn if the user mistakenly sets "PublishServerDescriptor
24851 hidserv" in her torrc. The 'hidserv' argument never controlled
24852 publication of hidden service descriptors. Bugfix on 0.2.0.1-alpha.
24855 - Adjust our TLS Diffie-Hellman parameters to match those used by
24857 - Update to the February 1 2011 Maxmind GeoLite Country database.
24860 - Check for and reject overly long directory certificates and
24861 directory tokens before they have a chance to hit any assertions.
24862 Bugfix on 0.2.1.28. Found by "doorss".
24863 - Bring the logic that gathers routerinfos and assesses the
24864 acceptability of circuits into line. This prevents a Tor OP from
24865 getting locked in a cycle of choosing its local OR as an exit for a
24866 path (due to a .exit request) and then rejecting the circuit because
24867 its OR is not listed yet. It also prevents Tor clients from using an
24868 OR running in the same instance as an exit (due to a .exit request)
24869 if the OR does not meet the same requirements expected of an OR
24870 running elsewhere. Fixes bug 1859; bugfix on 0.1.0.1-rc.
24872 o Packaging changes:
24873 - Stop shipping the Tor specs files and development proposal documents
24874 in the tarball. They are now in a separate git repository at
24875 git://git.torproject.org/torspec.git
24876 - Do not include Git version tags as though they are SVN tags when
24877 generating a tarball from inside a repository that has switched
24878 between branches. Bugfix on 0.2.1.15-rc; fixes bug 2402.
24881 Changes in version 0.2.2.22-alpha - 2011-01-25
24882 Tor 0.2.2.22-alpha fixes a few more less-critical security issues. The
24883 main other change is a slight tweak to Tor's TLS handshake that makes
24884 relays and bridges that run this new version reachable from Iran again.
24885 We don't expect this tweak will win the arms race long-term, but it
24886 will buy us a bit more time until we roll out a better solution.
24889 - Fix a bounds-checking error that could allow an attacker to
24890 remotely crash a directory authority. Bugfix on 0.2.1.5-alpha.
24891 Found by "piebeer".
24892 - Don't assert when changing from bridge to relay or vice versa
24893 via the controller. The assert happened because we didn't properly
24894 initialize our keys in this case. Bugfix on 0.2.2.18-alpha; fixes
24895 bug 2433. Reported by bastik.
24898 - Adjust our TLS Diffie-Hellman parameters to match those used by
24900 - Provide a log message stating which geoip file we're parsing
24901 instead of just stating that we're parsing the geoip file.
24902 Implements ticket 2432.
24905 - Check for and reject overly long directory certificates and
24906 directory tokens before they have a chance to hit any assertions.
24907 Bugfix on 0.2.1.28 / 0.2.2.20-alpha. Found by "doorss".
24910 Changes in version 0.2.2.21-alpha - 2011-01-15
24911 Tor 0.2.2.21-alpha includes all the patches from Tor 0.2.1.29, which
24912 continues our recent code security audit work. The main fix resolves
24913 a remote heap overflow vulnerability that can allow remote code
24914 execution (CVE-2011-0427). Other fixes address a variety of assert
24915 and crash bugs, most of which we think are hard to exploit remotely.
24917 o Major bugfixes (security), also included in 0.2.1.29:
24918 - Fix a heap overflow bug where an adversary could cause heap
24919 corruption. This bug probably allows remote code execution
24920 attacks. Reported by "debuger". Fixes CVE-2011-0427. Bugfix on
24922 - Prevent a denial-of-service attack by disallowing any
24923 zlib-compressed data whose compression factor is implausibly
24924 high. Fixes part of bug 2324; reported by "doorss".
24925 - Zero out a few more keys in memory before freeing them. Fixes
24926 bug 2384 and part of bug 2385. These key instances found by
24927 "cypherpunks", based on Andrew Case's report about being able
24928 to find sensitive data in Tor's memory space if you have enough
24929 permissions. Bugfix on 0.0.2pre9.
24931 o Major bugfixes (crashes), also included in 0.2.1.29:
24932 - Prevent calls to Libevent from inside Libevent log handlers.
24933 This had potential to cause a nasty set of crashes, especially
24934 if running Libevent with debug logging enabled, and running
24935 Tor with a controller watching for low-severity log messages.
24936 Bugfix on 0.1.0.2-rc. Fixes bug 2190.
24937 - Add a check for SIZE_T_MAX to tor_realloc() to try to avoid
24938 underflow errors there too. Fixes the other part of bug 2324.
24939 - Fix a bug where we would assert if we ever had a
24940 cached-descriptors.new file (or another file read directly into
24941 memory) of exactly SIZE_T_CEILING bytes. Fixes bug 2326; bugfix
24942 on 0.2.1.25. Found by doorss.
24943 - Fix some potential asserts and parsing issues with grossly
24944 malformed router caches. Fixes bug 2352; bugfix on Tor 0.2.1.27.
24947 o Minor bugfixes (other), also included in 0.2.1.29:
24948 - Fix a bug with handling misformed replies to reverse DNS lookup
24949 requests in DNSPort. Bugfix on Tor 0.2.0.1-alpha. Related to a
24950 bug reported by doorss.
24951 - Fix compilation on mingw when a pthreads compatibility library
24952 has been installed. (We don't want to use it, so we shouldn't
24953 be including pthread.h.) Fixes bug 2313; bugfix on 0.1.0.1-rc.
24954 - Fix a bug where we would declare that we had run out of virtual
24955 addresses when the address space was only half-exhausted. Bugfix
24957 - Correctly handle the case where AutomapHostsOnResolve is set but
24958 no virtual addresses are available. Fixes bug 2328; bugfix on
24959 0.1.2.1-alpha. Bug found by doorss.
24960 - Correctly handle wrapping around when we run out of virtual
24961 address space. Found by cypherpunks; bugfix on 0.2.0.5-alpha.
24963 o Minor features, also included in 0.2.1.29:
24964 - Update to the January 1 2011 Maxmind GeoLite Country database.
24965 - Introduce output size checks on all of our decryption functions.
24967 o Build changes, also included in 0.2.1.29:
24968 - Tor does not build packages correctly with Automake 1.6 and earlier;
24969 added a check to Makefile.am to make sure that we're building with
24970 Automake 1.7 or later.
24971 - The 0.2.1.28 tarball was missing src/common/OpenBSD_malloc_Linux.c
24972 because we built it with a too-old version of automake. Thus that
24973 release broke ./configure --enable-openbsd-malloc, which is popular
24974 among really fast exit relays on Linux.
24976 o Major bugfixes, new in 0.2.2.21-alpha:
24977 - Prevent crash/heap corruption when the cbtnummodes consensus
24978 parameter is set to 0 or large values. Fixes bug 2317; bugfix
24981 o Major features, new in 0.2.2.21-alpha:
24982 - Introduce minimum/maximum values that clients will believe
24983 from the consensus. Now we'll have a better chance to avoid crashes
24984 or worse when a consensus param has a weird value.
24986 o Minor features, new in 0.2.2.21-alpha:
24987 - Make sure to disable DirPort if running as a bridge. DirPorts aren't
24988 used on bridges, and it makes bridge scanning somewhat easier.
24989 - If writing the state file to disk fails, wait up to an hour before
24990 retrying again, rather than trying again each second. Fixes bug
24991 2346; bugfix on Tor 0.1.1.3-alpha.
24992 - Make Libevent log messages get delivered to controllers later,
24993 and not from inside the Libevent log handler. This prevents unsafe
24994 reentrant Libevent calls while still letting the log messages
24996 - Detect platforms that brokenly use a signed size_t, and refuse to
24997 build there. Found and analyzed by doorss and rransom.
24998 - Fix a bunch of compile warnings revealed by mingw with gcc 4.5.
25001 o Minor bugfixes, new in 0.2.2.21-alpha:
25002 - Handle SOCKS messages longer than 128 bytes long correctly, rather
25003 than waiting forever for them to finish. Fixes bug 2330; bugfix
25004 on 0.2.0.16-alpha. Found by doorss.
25005 - Add assertions to check for overflow in arguments to
25006 base32_encode() and base32_decode(); fix a signed-unsigned
25007 comparison there too. These bugs are not actually reachable in Tor,
25008 but it's good to prevent future errors too. Found by doorss.
25009 - Correctly detect failures to create DNS requests when using Libevent
25010 versions before v2. (Before Libevent 2, we used our own evdns
25011 implementation. Its return values for Libevent's evdns_resolve_*()
25012 functions are not consistent with those from Libevent.) Fixes bug
25013 2363; bugfix on 0.2.2.6-alpha. Found by "lodger".
25015 o Documentation, new in 0.2.2.21-alpha:
25016 - Document the default socks host and port (127.0.0.1:9050) for
25020 Changes in version 0.2.1.29 - 2011-01-15
25021 Tor 0.2.1.29 continues our recent code security audit work. The main
25022 fix resolves a remote heap overflow vulnerability that can allow remote
25023 code execution. Other fixes address a variety of assert and crash bugs,
25024 most of which we think are hard to exploit remotely.
25026 o Major bugfixes (security):
25027 - Fix a heap overflow bug where an adversary could cause heap
25028 corruption. This bug probably allows remote code execution
25029 attacks. Reported by "debuger". Fixes CVE-2011-0427. Bugfix on
25031 - Prevent a denial-of-service attack by disallowing any
25032 zlib-compressed data whose compression factor is implausibly
25033 high. Fixes part of bug 2324; reported by "doorss".
25034 - Zero out a few more keys in memory before freeing them. Fixes
25035 bug 2384 and part of bug 2385. These key instances found by
25036 "cypherpunks", based on Andrew Case's report about being able
25037 to find sensitive data in Tor's memory space if you have enough
25038 permissions. Bugfix on 0.0.2pre9.
25040 o Major bugfixes (crashes):
25041 - Prevent calls to Libevent from inside Libevent log handlers.
25042 This had potential to cause a nasty set of crashes, especially
25043 if running Libevent with debug logging enabled, and running
25044 Tor with a controller watching for low-severity log messages.
25045 Bugfix on 0.1.0.2-rc. Fixes bug 2190.
25046 - Add a check for SIZE_T_MAX to tor_realloc() to try to avoid
25047 underflow errors there too. Fixes the other part of bug 2324.
25048 - Fix a bug where we would assert if we ever had a
25049 cached-descriptors.new file (or another file read directly into
25050 memory) of exactly SIZE_T_CEILING bytes. Fixes bug 2326; bugfix
25051 on 0.2.1.25. Found by doorss.
25052 - Fix some potential asserts and parsing issues with grossly
25053 malformed router caches. Fixes bug 2352; bugfix on Tor 0.2.1.27.
25056 o Minor bugfixes (other):
25057 - Fix a bug with handling misformed replies to reverse DNS lookup
25058 requests in DNSPort. Bugfix on Tor 0.2.0.1-alpha. Related to a
25059 bug reported by doorss.
25060 - Fix compilation on mingw when a pthreads compatibility library
25061 has been installed. (We don't want to use it, so we shouldn't
25062 be including pthread.h.) Fixes bug 2313; bugfix on 0.1.0.1-rc.
25063 - Fix a bug where we would declare that we had run out of virtual
25064 addresses when the address space was only half-exhausted. Bugfix
25066 - Correctly handle the case where AutomapHostsOnResolve is set but
25067 no virtual addresses are available. Fixes bug 2328; bugfix on
25068 0.1.2.1-alpha. Bug found by doorss.
25069 - Correctly handle wrapping around to when we run out of virtual
25070 address space. Found by cypherpunks, bugfix on 0.2.0.5-alpha.
25071 - The 0.2.1.28 tarball was missing src/common/OpenBSD_malloc_Linux.c
25072 because we built it with a too-old version of automake. Thus that
25073 release broke ./configure --enable-openbsd-malloc, which is popular
25074 among really fast exit relays on Linux.
25077 - Update to the January 1 2011 Maxmind GeoLite Country database.
25078 - Introduce output size checks on all of our decryption functions.
25081 - Tor does not build packages correctly with Automake 1.6 and earlier;
25082 added a check to Makefile.am to make sure that we're building with
25083 Automake 1.7 or later.
25086 Changes in version 0.2.2.20-alpha - 2010-12-17
25087 Tor 0.2.2.20-alpha does some code cleanup to reduce the risk of remotely
25088 exploitable bugs. We also fix a variety of other significant bugs,
25089 change the IP address for one of our directory authorities, and update
25090 the minimum version that Tor relays must run to join the network.
25093 - Fix a remotely exploitable bug that could be used to crash instances
25094 of Tor remotely by overflowing on the heap. Remote-code execution
25095 hasn't been confirmed, but can't be ruled out. Everyone should
25096 upgrade. Bugfix on the 0.1.1 series and later.
25097 - Fix a bug that could break accounting on 64-bit systems with large
25098 time_t values, making them hibernate for impossibly long intervals.
25099 Fixes bug 2146. Bugfix on 0.0.9pre6; fix by boboper.
25100 - Fix a logic error in directory_fetches_from_authorities() that
25101 would cause all _non_-exits refusing single-hop-like circuits
25102 to fetch from authorities, when we wanted to have _exits_ fetch
25103 from authorities. Fixes more of 2097. Bugfix on 0.2.2.16-alpha;
25105 - Fix a stream fairness bug that would cause newer streams on a given
25106 circuit to get preference when reading bytes from the origin or
25107 destination. Fixes bug 2210. Fix by Mashael AlSabah. This bug was
25108 introduced before the first Tor release, in svn revision r152.
25110 o Directory authority changes:
25111 - Change IP address and ports for gabelmoo (v3 directory authority).
25114 - Avoid crashes when AccountingMax is set on clients. Fixes bug 2235.
25115 Bugfix on 0.2.2.18-alpha. Diagnosed by boboper.
25116 - Fix an off-by-one error in calculating some controller command
25117 argument lengths. Fortunately, this mistake is harmless since
25118 the controller code does redundant NUL termination too. Found by
25119 boboper. Bugfix on 0.1.1.1-alpha.
25120 - Do not dereference NULL if a bridge fails to build its
25121 extra-info descriptor. Found by an anonymous commenter on
25122 Trac. Bugfix on 0.2.2.19-alpha.
25125 - Update to the December 1 2010 Maxmind GeoLite Country database.
25126 - Directory authorities now reject relays running any versions of
25127 Tor between 0.2.1.3-alpha and 0.2.1.18 inclusive; they have
25128 known bugs that keep RELAY_EARLY cells from working on rendezvous
25129 circuits. Followup to fix for bug 2081.
25130 - Directory authorities now reject relays running any version of Tor
25131 older than 0.2.0.26-rc. That version is the earliest that fetches
25132 current directory information correctly. Fixes bug 2156.
25133 - Report only the top 10 ports in exit-port stats in order not to
25134 exceed the maximum extra-info descriptor length of 50 KB. Implements
25138 Changes in version 0.2.1.28 - 2010-12-17
25139 Tor 0.2.1.28 does some code cleanup to reduce the risk of remotely
25140 exploitable bugs. We also took this opportunity to change the IP address
25141 for one of our directory authorities, and to update the geoip database
25145 - Fix a remotely exploitable bug that could be used to crash instances
25146 of Tor remotely by overflowing on the heap. Remote-code execution
25147 hasn't been confirmed, but can't be ruled out. Everyone should
25148 upgrade. Bugfix on the 0.1.1 series and later.
25150 o Directory authority changes:
25151 - Change IP address and ports for gabelmoo (v3 directory authority).
25154 - Update to the December 1 2010 Maxmind GeoLite Country database.
25157 Changes in version 0.2.1.27 - 2010-11-23
25158 Yet another OpenSSL security patch broke its compatibility with Tor:
25159 Tor 0.2.1.27 makes relays work with openssl 0.9.8p and 1.0.0.b. We
25160 also took this opportunity to fix several crash bugs, integrate a new
25161 directory authority, and update the bundled GeoIP database.
25164 - Resolve an incompatibility with OpenSSL 0.9.8p and OpenSSL 1.0.0b:
25165 No longer set the tlsext_host_name extension on server SSL objects;
25166 but continue to set it on client SSL objects. Our goal in setting
25167 it was to imitate a browser, not a vhosting server. Fixes bug 2204;
25168 bugfix on 0.2.1.1-alpha.
25169 - Do not log messages to the controller while shrinking buffer
25170 freelists. Doing so would sometimes make the controller connection
25171 try to allocate a buffer chunk, which would mess up the internals
25172 of the freelist and cause an assertion failure. Fixes bug 1125;
25173 fixed by Robert Ransom. Bugfix on 0.2.0.16-alpha.
25174 - Learn our external IP address when we're a relay or bridge, even if
25175 we set PublishServerDescriptor to 0. Bugfix on 0.2.0.3-alpha,
25176 where we introduced bridge relays that don't need to publish to
25177 be useful. Fixes bug 2050.
25178 - Do even more to reject (and not just ignore) annotations on
25179 router descriptors received anywhere but from the cache. Previously
25180 we would ignore such annotations at first, but cache them to disk
25181 anyway. Bugfix on 0.2.0.8-alpha. Found by piebeer.
25182 - When you're using bridges and your network goes away and your
25183 bridges get marked as down, recover when you attempt a new socks
25184 connection (if the network is back), rather than waiting up to an
25185 hour to try fetching new descriptors for your bridges. Bugfix on
25186 0.2.0.3-alpha; fixes bug 1981.
25189 - Move to the November 2010 Maxmind GeoLite country db (rather
25190 than the June 2009 ip-to-country GeoIP db) for our statistics that
25191 count how many users relays are seeing from each country. Now we'll
25192 have more accurate data, especially for many African countries.
25194 o New directory authorities:
25195 - Set up maatuska (run by Linus Nordberg) as the eighth v3 directory
25199 - Fix an assertion failure that could occur in directory caches or
25200 bridge users when using a very short voting interval on a testing
25201 network. Diagnosed by Robert Hogan. Fixes bug 1141; bugfix on
25203 - Enforce multiplicity rules when parsing annotations. Bugfix on
25204 0.2.0.8-alpha. Found by piebeer.
25205 - Allow handshaking OR connections to take a full KeepalivePeriod
25206 seconds to handshake. Previously, we would close them after
25207 IDLE_OR_CONN_TIMEOUT (180) seconds, the same timeout as if they
25208 were open. Bugfix on 0.2.1.26; fixes bug 1840. Thanks to mingw-san
25210 - When building with --enable-gcc-warnings on OpenBSD, disable
25211 warnings in system headers. This makes --enable-gcc-warnings
25212 pass on OpenBSD 4.8.
25215 - Exit nodes didn't recognize EHOSTUNREACH as a plausible error code,
25216 and so sent back END_STREAM_REASON_MISC. Clients now recognize a new
25217 stream ending reason for this case: END_STREAM_REASON_NOROUTE.
25218 Servers can start sending this code when enough clients recognize
25219 it. Bugfix on 0.1.0.1-rc; fixes part of bug 1793.
25220 - Build correctly on mingw with more recent versions of OpenSSL 0.9.8.
25221 Patch from mingw-san.
25224 - Remove the old debian/ directory from the main Tor distribution.
25225 The official Tor-for-debian git repository lives at the URL
25226 https://git.torproject.org/debian/tor.git
25227 - Stop shipping the old doc/website/ directory in the tarball. We
25228 changed the website format in late 2010, and what we shipped in
25229 0.2.1.26 really wasn't that useful anyway.
25232 Changes in version 0.2.2.19-alpha - 2010-11-22
25233 Yet another OpenSSL security patch broke its compatibility with Tor:
25234 Tor 0.2.2.19-alpha makes relays work with OpenSSL 0.9.8p and 1.0.0.b.
25237 - Resolve an incompatibility with OpenSSL 0.9.8p and OpenSSL 1.0.0b:
25238 No longer set the tlsext_host_name extension on server SSL objects;
25239 but continue to set it on client SSL objects. Our goal in setting
25240 it was to imitate a browser, not a vhosting server. Fixes bug 2204;
25241 bugfix on 0.2.1.1-alpha.
25244 - Try harder not to exceed the maximum length of 50 KB when writing
25245 statistics to extra-info descriptors. This bug was triggered by very
25246 fast relays reporting exit-port, entry, and dirreq statistics.
25247 Reported by Olaf Selke. Bugfix on 0.2.2.1-alpha. Fixes bug 2183.
25248 - Publish a router descriptor even if generating an extra-info
25249 descriptor fails. Previously we would not publish a router
25250 descriptor without an extra-info descriptor; this can cause fast
25251 exit relays collecting exit-port statistics to drop from the
25252 consensus. Bugfix on 0.1.2.9-rc; fixes bug 2195.
25255 Changes in version 0.2.2.18-alpha - 2010-11-16
25256 Tor 0.2.2.18-alpha fixes several crash bugs that have been nagging
25257 us lately, makes unpublished bridge relays able to detect their IP
25258 address, and fixes a wide variety of other bugs to get us much closer
25259 to a stable release.
25262 - Do even more to reject (and not just ignore) annotations on
25263 router descriptors received anywhere but from the cache. Previously
25264 we would ignore such annotations at first, but cache them to disk
25265 anyway. Bugfix on 0.2.0.8-alpha. Found by piebeer.
25266 - Do not log messages to the controller while shrinking buffer
25267 freelists. Doing so would sometimes make the controller connection
25268 try to allocate a buffer chunk, which would mess up the internals
25269 of the freelist and cause an assertion failure. Fixes bug 1125;
25270 fixed by Robert Ransom. Bugfix on 0.2.0.16-alpha.
25271 - Learn our external IP address when we're a relay or bridge, even if
25272 we set PublishServerDescriptor to 0. Bugfix on 0.2.0.3-alpha,
25273 where we introduced bridge relays that don't need to publish to
25274 be useful. Fixes bug 2050.
25275 - Maintain separate TLS contexts and certificates for incoming and
25276 outgoing connections in bridge relays. Previously we would use the
25277 same TLS contexts and certs for incoming and outgoing connections.
25278 Bugfix on 0.2.0.3-alpha; addresses bug 988.
25279 - Maintain separate identity keys for incoming and outgoing TLS
25280 contexts in bridge relays. Previously we would use the same
25281 identity keys for incoming and outgoing TLS contexts. Bugfix on
25282 0.2.0.3-alpha; addresses the other half of bug 988.
25283 - Avoid an assertion failure when we as an authority receive a
25284 duplicate upload of a router descriptor that we already have,
25285 but which we previously considered an obsolete descriptor.
25286 Fixes another case of bug 1776. Bugfix on 0.2.2.16-alpha.
25287 - Avoid a crash bug triggered by looking at a dangling pointer while
25288 setting the network status consensus. Found by Robert Ransom.
25289 Bugfix on 0.2.2.17-alpha. Fixes bug 2097.
25290 - Fix a logic error where servers that _didn't_ act as exits would
25291 try to keep their server lists more aggressively up to date than
25292 exits, when it was supposed to be the other way around. Bugfix
25295 o Minor bugfixes (on Tor 0.2.1.x and earlier):
25296 - When we're trying to guess whether we know our IP address as
25297 a relay, we would log various ways that we failed to guess
25298 our address, but never log that we ended up guessing it
25299 successfully. Now add a log line to help confused and anxious
25300 relay operators. Bugfix on 0.1.2.1-alpha; fixes bug 1534.
25301 - Bring the logic that gathers routerinfos and assesses the
25302 acceptability of circuits into line. This prevents a Tor OP from
25303 getting locked in a cycle of choosing its local OR as an exit for a
25304 path (due to a .exit request) and then rejecting the circuit because
25305 its OR is not listed yet. It also prevents Tor clients from using an
25306 OR running in the same instance as an exit (due to a .exit request)
25307 if the OR does not meet the same requirements expected of an OR
25308 running elsewhere. Fixes bug 1859; bugfix on 0.1.0.1-rc.
25309 - Correctly describe errors that occur when generating a TLS object.
25310 Previously we would attribute them to a failure while generating a
25311 TLS context. Patch by Robert Ransom. Bugfix on 0.1.0.4-rc; fixes
25313 - Enforce multiplicity rules when parsing annotations. Bugfix on
25314 0.2.0.8-alpha. Found by piebeer.
25315 - Fix warnings that newer versions of autoconf produced during
25316 ./autogen.sh. These warnings appear to be harmless in our case,
25317 but they were extremely verbose. Fixes bug 2020.
25319 o Minor bugfixes (on Tor 0.2.2.x):
25320 - Enable protection of small arrays whenever we build with gcc
25321 hardening features, not only when also building with warnings
25322 enabled. Fixes bug 2031; bugfix on 0.2.2.14-alpha. Reported by keb.
25325 - Make hidden services work better in private Tor networks by not
25326 requiring any uptime to join the hidden service descriptor
25327 DHT. Implements ticket 2088.
25328 - Rate-limit the "your application is giving Tor only an IP address"
25329 warning. Addresses bug 2000; bugfix on 0.0.8pre2.
25330 - When AllowSingleHopExits is set, print a warning to explain to the
25331 relay operator why most clients are avoiding her relay.
25332 - Update to the November 1 2010 Maxmind GeoLite Country database.
25334 o Code simplifications and refactoring:
25335 - When we fixed bug 1038 we had to put in a restriction not to send
25336 RELAY_EARLY cells on rend circuits. This was necessary as long
25337 as relays using Tor 0.2.1.3-alpha through 0.2.1.18-alpha were
25338 active. Now remove this obsolete check. Resolves bug 2081.
25339 - Some options used different conventions for uppercasing of acronyms
25340 when comparing manpage and source. Fix those in favor of the
25341 manpage, as it makes sense to capitalize acronyms.
25342 - Remove the torrc.complete file. It hasn't been kept up to date
25343 and users will have better luck checking out the manpage.
25344 - Remove the obsolete "NoPublish" option; it has been flagged
25345 as obsolete and has produced a warning since 0.1.1.18-rc.
25346 - Remove everything related to building the expert bundle for OS X.
25347 It has confused many users, doesn't work right on OS X 10.6,
25348 and is hard to get rid of once installed. Resolves bug 1274.
25351 Changes in version 0.2.2.17-alpha - 2010-09-30
25352 Tor 0.2.2.17-alpha introduces a feature to make it harder for clients
25353 to use one-hop circuits (which can put the exit relays at higher risk,
25354 plus unbalance the network); fixes a big bug in bandwidth accounting
25355 for relays that want to limit their monthly bandwidth use; fixes a
25356 big pile of bugs in how clients tolerate temporary network failure;
25357 and makes our adaptive circuit build timeout feature (which improves
25358 client performance if your network is fast while not breaking things
25359 if your network is slow) better handle bad networks.
25362 - Exit relays now try harder to block exit attempts from unknown
25363 relays, to make it harder for people to use them as one-hop proxies
25364 a la tortunnel. Controlled by the refuseunknownexits consensus
25365 parameter (currently enabled), or you can override it on your
25366 relay with the RefuseUnknownExits torrc option. Resolves bug 1751.
25368 o Major bugfixes (0.2.1.x and earlier):
25369 - Fix a bug in bandwidth accounting that could make us use twice
25370 the intended bandwidth when our interval start changes due to
25371 daylight saving time. Now we tolerate skew in stored vs computed
25372 interval starts: if the start of the period changes by no more than
25373 50% of the period's duration, we remember bytes that we transferred
25374 in the old period. Fixes bug 1511; bugfix on 0.0.9pre5.
25375 - Always search the Windows system directory for system DLLs, and
25376 nowhere else. Bugfix on 0.1.1.23; fixes bug 1954.
25377 - When you're using bridges and your network goes away and your
25378 bridges get marked as down, recover when you attempt a new socks
25379 connection (if the network is back), rather than waiting up to an
25380 hour to try fetching new descriptors for your bridges. Bugfix on
25381 0.2.0.3-alpha; fixes bug 1981.
25383 o Major bugfixes (on 0.2.2.x):
25384 - Fix compilation on Windows. Bugfix on 0.2.2.16-alpha; related to
25386 - Fix a segfault that could happen when operating a bridge relay with
25387 no GeoIP database set. Fixes bug 1964; bugfix on 0.2.2.15-alpha.
25388 - The consensus bandwidth-weights (used by clients to choose fast
25389 relays) entered an unexpected edge case in September where
25390 Exits were much scarcer than Guards, resulting in bad weight
25391 recommendations. Now we compute them using new constraints that
25392 should succeed in all cases. Also alter directory authorities to
25393 not include the bandwidth-weights line if they fail to produce
25394 valid values. Fixes bug 1952; bugfix on 0.2.2.10-alpha.
25395 - When weighting bridges during path selection, we used to trust
25396 the bandwidths they provided in their descriptor, only capping them
25397 at 10MB/s. This turned out to be problematic for two reasons:
25398 Bridges could claim to handle a lot more traffic then they
25399 actually would, thus making more clients pick them and have a
25400 pretty effective DoS attack. The other issue is that new bridges
25401 that might not have a good estimate for their bw capacity yet
25402 would not get used at all unless no other bridges are available
25403 to a client. Fixes bug 1912; bugfix on 0.2.2.7-alpha.
25405 o Major bugfixes (on the circuit build timeout feature, 0.2.2.x):
25406 - Ignore cannibalized circuits when recording circuit build times.
25407 This should provide for a minor performance improvement for hidden
25408 service users using 0.2.2.14-alpha, and should remove two spurious
25409 notice log messages. Bugfix on 0.2.2.14-alpha; fixes bug 1740.
25410 - Simplify the logic that causes us to decide if the network is
25411 unavailable for purposes of recording circuit build times. If we
25412 receive no cells whatsoever for the entire duration of a circuit's
25413 full measured lifetime, the network is probably down. Also ignore
25414 one-hop directory fetching circuit timeouts when calculating our
25415 circuit build times. These changes should hopefully reduce the
25416 cases where we see ridiculous circuit build timeouts for people
25417 with spotty wireless connections. Fixes part of bug 1772; bugfix
25419 - Prevent the circuit build timeout from becoming larger than
25420 the maximum build time we have ever seen. Also, prevent the time
25421 period for measurement circuits from becoming larger than twice that
25422 value. Fixes the other part of bug 1772; bugfix on 0.2.2.2-alpha.
25425 - When we run out of directory information such that we can't build
25426 circuits, but then get enough that we can build circuits, log when
25427 we actually construct a circuit, so the user has a better chance of
25428 knowing what's going on. Fixes bug 1362.
25429 - Be more generous with how much bandwidth we'd use up (with
25430 accounting enabled) before entering "soft hibernation". Previously,
25431 we'd refuse new connections and circuits once we'd used up 95% of
25432 our allotment. Now, we use up 95% of our allotment, AND make sure
25433 that we have no more than 500MB (or 3 hours of expected traffic,
25434 whichever is lower) remaining before we enter soft hibernation.
25435 - If we've configured EntryNodes and our network goes away and/or all
25436 our entrynodes get marked down, optimistically retry them all when
25437 a new socks application request appears. Fixes bug 1882.
25438 - Add some more defensive programming for architectures that can't
25439 handle unaligned integer accesses. We don't know of any actual bugs
25440 right now, but that's the best time to fix them. Fixes bug 1943.
25441 - Support line continuations in the torrc config file. If a line
25442 ends with a single backslash character, the newline is ignored, and
25443 the configuration value is treated as continuing on the next line.
25446 o Minor bugfixes (on 0.2.1.x and earlier):
25447 - For bandwidth accounting, calculate our expected bandwidth rate
25448 based on the time during which we were active and not in
25449 soft-hibernation during the last interval. Previously, we were
25450 also considering the time spent in soft-hibernation. If this
25451 was a long time, we would wind up underestimating our bandwidth
25452 by a lot, and skewing our wakeup time towards the start of the
25453 accounting interval. Fixes bug 1789. Bugfix on 0.0.9pre5.
25455 o Minor bugfixes (on 0.2.2.x):
25456 - Resume generating CIRC FAILED REASON=TIMEOUT control port messages,
25457 which were disabled by the circuit build timeout changes in
25458 0.2.2.14-alpha. Bugfix on 0.2.2.14-alpha; fixes bug 1739.
25459 - Make sure we don't warn about missing bandwidth weights when
25460 choosing bridges or other relays not in the consensus. Bugfix on
25461 0.2.2.10-alpha; fixes bug 1805.
25462 - In our logs, do not double-report signatures from unrecognized
25463 authorities both as "from unknown authority" and "not
25464 present". Fixes bug 1956, bugfix on 0.2.2.16-alpha.
25467 Changes in version 0.2.2.16-alpha - 2010-09-17
25468 Tor 0.2.2.16-alpha fixes a variety of old stream fairness bugs (most
25469 evident at exit relays), and also continues to resolve all the little
25470 bugs that have been filling up trac lately.
25472 o Major bugfixes (stream-level fairness):
25473 - When receiving a circuit-level SENDME for a blocked circuit, try
25474 to package cells fairly from all the streams that had previously
25475 been blocked on that circuit. Previously, we had started with the
25476 oldest stream, and allowed each stream to potentially exhaust
25477 the circuit's package window. This gave older streams on any
25478 given circuit priority over newer ones. Fixes bug 1937. Detected
25479 originally by Camilo Viecco. This bug was introduced before the
25480 first Tor release, in svn commit r152: it is the new winner of
25481 the longest-lived bug prize.
25482 - When the exit relay got a circuit-level sendme cell, it started
25483 reading on the exit streams, even if had 500 cells queued in the
25484 circuit queue already, so the circuit queue just grew and grew in
25485 some cases. We fix this by not re-enabling reading on receipt of a
25486 sendme cell when the cell queue is blocked. Fixes bug 1653. Bugfix
25487 on 0.2.0.1-alpha. Detected by Mashael AlSabah. Original patch by
25489 - Newly created streams were allowed to read cells onto circuits,
25490 even if the circuit's cell queue was blocked and waiting to drain.
25491 This created potential unfairness, as older streams would be
25492 blocked, but newer streams would gladly fill the queue completely.
25493 We add code to detect this situation and prevent any stream from
25494 getting more than one free cell. Bugfix on 0.2.0.1-alpha. Partially
25498 - Update to the September 1 2010 Maxmind GeoLite Country database.
25499 - Warn when CookieAuthFileGroupReadable is set but CookieAuthFile is
25500 not. This would lead to a cookie that is still not group readable.
25501 Closes bug 1843. Suggested by katmagic.
25502 - When logging a rate-limited warning, we now mention how many messages
25503 got suppressed since the last warning.
25504 - Add new "perconnbwrate" and "perconnbwburst" consensus params to
25505 do individual connection-level rate limiting of clients. The torrc
25506 config options with the same names trump the consensus params, if
25507 both are present. Replaces the old "bwconnrate" and "bwconnburst"
25508 consensus params which were broken from 0.2.2.7-alpha through
25509 0.2.2.14-alpha. Closes bug 1947.
25510 - When a router changes IP address or port, authorities now launch
25511 a new reachability test for it. Implements ticket 1899.
25512 - Make the formerly ugly "2 unknown, 7 missing key, 0 good, 0 bad,
25513 2 no signature, 4 required" messages about consensus signatures
25514 easier to read, and make sure they get logged at the same severity
25515 as the messages explaining which keys are which. Fixes bug 1290.
25516 - Don't warn when we have a consensus that we can't verify because
25517 of missing certificates, unless those certificates are ones
25518 that we have been trying and failing to download. Fixes bug 1145.
25519 - If you configure your bridge with a known identity fingerprint,
25520 and the bridge authority is unreachable (as it is in at least
25521 one country now), fall back to directly requesting the descriptor
25522 from the bridge. Finishes the feature started in 0.2.0.10-alpha;
25524 - When building with --enable-gcc-warnings on OpenBSD, disable
25525 warnings in system headers. This makes --enable-gcc-warnings
25526 pass on OpenBSD 4.8.
25528 o Minor bugfixes (on 0.2.1.x and earlier):
25529 - Authorities will now attempt to download consensuses if their
25530 own efforts to make a live consensus have failed. This change
25531 means authorities that restart will fetch a valid consensus, and
25532 it means authorities that didn't agree with the current consensus
25533 will still fetch and serve it if it has enough signatures. Bugfix
25534 on 0.2.0.9-alpha; fixes bug 1300.
25535 - Ensure DNS requests launched by "RESOLVE" commands from the
25536 controller respect the __LeaveStreamsUnattached setconf options. The
25537 same goes for requests launched via DNSPort or transparent
25538 proxying. Bugfix on 0.2.0.1-alpha; fixes bug 1525.
25539 - Allow handshaking OR connections to take a full KeepalivePeriod
25540 seconds to handshake. Previously, we would close them after
25541 IDLE_OR_CONN_TIMEOUT (180) seconds, the same timeout as if they
25542 were open. Bugfix on 0.2.1.26; fixes bug 1840. Thanks to mingw-san
25544 - Rate-limit "Failed to hand off onionskin" warnings.
25545 - Never relay a cell for a circuit we have already destroyed.
25546 Between marking a circuit as closeable and finally closing it,
25547 it may have been possible for a few queued cells to get relayed,
25548 even though they would have been immediately dropped by the next
25549 OR in the circuit. Fixes bug 1184; bugfix on 0.2.0.1-alpha.
25550 - Never queue a cell for a circuit that's already been marked
25552 - Never vote for a server as "Running" if we have a descriptor for
25553 it claiming to be hibernating, and that descriptor was published
25554 more recently than our last contact with the server. Bugfix on
25555 0.2.0.3-alpha; fixes bug 911.
25556 - Squash a compile warning on OpenBSD. Reported by Tas; fixes
25559 o Minor bugfixes (on 0.2.2.x):
25560 - Fix a regression introduced in 0.2.2.7-alpha that marked relays
25561 down if a directory fetch fails and you've configured either
25562 bridges or EntryNodes. The intent was to mark the relay as down
25563 _unless_ you're using bridges or EntryNodes, since if you are
25564 then you could quickly run out of entry points.
25565 - Fix the Windows directory-listing code. A bug introduced in
25566 0.2.2.14-alpha could make Windows directory servers forget to load
25567 some of their cached v2 networkstatus files.
25568 - Really allow clients to use relays as bridges. Fixes bug 1776;
25569 bugfix on 0.2.2.15-alpha.
25570 - Demote a warn to info that happens when the CellStatistics option
25571 was just enabled. Bugfix on 0.2.2.15-alpha; fixes bug 1921.
25572 Reported by Moritz Bartl.
25573 - On Windows, build correctly either with or without Unicode support.
25574 This is necessary so that Tor can support fringe platforms like
25575 Windows 98 (which has no Unicode), or Windows CE (which has no
25576 non-Unicode). Bugfix on 0.2.2.14-alpha; fixes bug 1797.
25579 - Add a unit test for cross-platform directory-listing code.
25582 Changes in version 0.2.2.15-alpha - 2010-08-18
25583 Tor 0.2.2.15-alpha fixes a big bug in hidden service availability,
25584 fixes a variety of other bugs that were preventing performance
25585 experiments from moving forward, fixes several bothersome memory leaks,
25586 and generally closes a lot of smaller bugs that have been filling up
25590 - Stop assigning the HSDir flag to relays that disable their
25591 DirPort (and thus will refuse to answer directory requests). This
25592 fix should dramatically improve the reachability of hidden services:
25593 hidden services and hidden service clients pick six HSDir relays
25594 to store and retrieve the hidden service descriptor, and currently
25595 about half of the HSDir relays will refuse to work. Bugfix on
25596 0.2.0.10-alpha; fixes part of bug 1693.
25597 - The PerConnBWRate and Burst config options, along with the
25598 bwconnrate and bwconnburst consensus params, initialized each conn's
25599 token bucket values only when the connection is established. Now we
25600 update them if the config options change, and update them every time
25601 we get a new consensus. Otherwise we can encounter an ugly edge
25602 case where we initialize an OR conn to client-level bandwidth,
25603 but then later the relay joins the consensus and we leave it
25604 throttled. Bugfix on 0.2.2.7-alpha; fixes bug 1830.
25605 - Fix a regression that caused Tor to rebind its ports if it receives
25606 SIGHUP while hibernating. Bugfix in 0.1.1.6-alpha; closes bug 919.
25609 - Lower the maximum weighted-fractional-uptime cutoff to 98%. This
25610 should give us approximately 40-50% more Guard-flagged nodes,
25611 improving the anonymity the Tor network can provide and also
25612 decreasing the dropoff in throughput that relays experience when
25613 they first get the Guard flag.
25614 - Allow enabling or disabling the *Statistics config options while
25618 - Update to the August 1 2010 Maxmind GeoLite Country database.
25619 - Have the controller interface give a more useful message than
25620 "Internal Error" in response to failed GETINFO requests.
25621 - Warn when the same option is provided more than once in a torrc
25622 file, on the command line, or in a single SETCONF statement, and
25623 the option is one that only accepts a single line. Closes bug 1384.
25624 - Build correctly on mingw with more recent versions of OpenSSL 0.9.8.
25625 Patch from mingw-san.
25626 - Add support for the country code "{??}" in torrc options like
25627 ExcludeNodes, to indicate all routers of unknown country. Closes
25629 - Relays report the number of bytes spent on answering directory
25630 requests in extra-info descriptors similar to {read,write}-history.
25631 Implements enhancement 1790.
25633 o Minor bugfixes (on 0.2.1.x and earlier):
25634 - Complain if PublishServerDescriptor is given multiple arguments that
25635 include 0 or 1. This configuration will be rejected in the future.
25636 Bugfix on 0.2.0.1-alpha; closes bug 1107.
25637 - Disallow BridgeRelay 1 and ORPort 0 at once in the configuration.
25638 Bugfix on 0.2.0.13-alpha; closes bug 928.
25639 - Change "Application request when we're believed to be offline."
25640 notice to "Application request when we haven't used client
25641 functionality lately.", to clarify that it's not an error. Bugfix
25642 on 0.0.9.3; fixes bug 1222.
25643 - Fix a bug in the controller interface where "GETINFO ns/asdaskljkl"
25644 would return "551 Internal error" rather than "552 Unrecognized key
25645 ns/asdaskljkl". Bugfix on 0.1.2.3-alpha.
25646 - Users can't configure a regular relay to be their bridge. It didn't
25647 work because when Tor fetched the bridge descriptor, it found
25648 that it already had it, and didn't realize that the purpose of the
25649 descriptor had changed. Now we replace routers with a purpose other
25650 than bridge with bridge descriptors when fetching them. Bugfix on
25651 0.1.1.9-alpha. Bug 1776 not yet fixed because now we immediately
25652 refetch the descriptor with router purpose 'general', disabling
25654 - Fix a rare bug in rend_fn unit tests: we would fail a test when
25655 a randomly generated port is 0. Diagnosed by Matt Edman. Bugfix
25656 on 0.2.0.10-alpha; fixes bug 1808.
25657 - Exit nodes didn't recognize EHOSTUNREACH as a plausible error code,
25658 and so sent back END_STREAM_REASON_MISC. Clients now recognize a new
25659 stream ending reason for this case: END_STREAM_REASON_NOROUTE.
25660 Servers can start sending this code when enough clients recognize
25661 it. Also update the spec to reflect this new reason. Bugfix on
25662 0.1.0.1-rc; fixes part of bug 1793.
25663 - Delay geoip stats collection by bridges for 6 hours, not 2 hours,
25664 when we switch from being a public relay to a bridge. Otherwise
25665 there will still be clients that see the relay in their consensus,
25666 and the stats will end up wrong. Bugfix on 0.2.1.15-rc; fixes bug
25668 - Instead of giving an assertion failure on an internal mismatch
25669 on estimated freelist size, just log a BUG warning and try later.
25670 Mitigates but does not fix bug 1125.
25671 - Fix an assertion failure that could occur in caches or bridge users
25672 when using a very short voting interval on a testing network.
25673 Diagnosed by Robert Hogan. Fixes bug 1141; bugfix on 0.2.0.8-alpha.
25675 o Minor bugfixes (on 0.2.2.x):
25676 - Alter directory authorities to always consider Exit-flagged nodes
25677 as potential Guard nodes in their votes. The actual decision to
25678 use Exits as Guards is done in the consensus bandwidth weights.
25679 Fixes bug 1294; bugfix on 0.2.2.10-alpha.
25680 - When the controller is reporting the purpose of circuits that
25681 didn't finish building before the circuit build timeout, it was
25682 printing UNKNOWN_13. Now print EXPIRED. Bugfix on 0.2.2.14-alpha.
25683 - Our libevent version parsing code couldn't handle versions like
25684 1.4.14b-stable and incorrectly warned the user about using an
25685 old and broken version of libevent. Treat 1.4.14b-stable like
25686 1.4.14-stable when parsing the version. Fixes bug 1731; bugfix
25688 - Don't use substitution references like $(VAR:MOD) when
25689 $(asciidoc_files) is empty -- make(1) on NetBSD transforms
25690 '$(:x)' to 'x' rather than the empty string. This bites us in
25691 doc/ when configured with --disable-asciidoc. Bugfix on
25692 0.2.2.9-alpha; fixes bug 1773.
25693 - Remove a spurious hidden service server-side log notice about
25694 "Ancient non-dirty circuits". Bugfix on 0.2.2.14-alpha; fixes
25696 - Fix compilation with --with-dmalloc set. Bugfix on 0.2.2.6-alpha;
25698 - Correctly report written bytes on linked connections. Found while
25699 implementing 1790. Bugfix on 0.2.2.4-alpha.
25700 - Fix three memory leaks: one in circuit_build_times_parse_state(),
25701 one in dirvote_add_signatures_to_pending_consensus(), and one every
25702 time we parse a v3 network consensus. Bugfixes on 0.2.2.14-alpha,
25703 0.2.2.6-alpha, and 0.2.2.10-alpha respectively; fixes bug 1831.
25705 o Code simplifications and refactoring:
25706 - Take a first step towards making or.h smaller by splitting out
25707 function definitions for all source files in src/or/. Leave
25708 structures and defines in or.h for now.
25709 - Remove a bunch of unused function declarations as well as a block of
25710 #if 0'd code from the unit tests. Closes bug 1824.
25711 - New unit tests for exit-port history statistics; refactored exit
25712 statistics code to be more easily tested.
25713 - Remove the old debian/ directory from the main Tor distribution.
25714 The official Tor-for-debian git repository lives at the URL
25715 https://git.torproject.org/debian/tor.git
25718 Changes in version 0.2.2.14-alpha - 2010-07-12
25719 Tor 0.2.2.14-alpha greatly improves client-side handling of
25720 circuit build timeouts, which are used to estimate speed and improve
25721 performance. We also move to a much better GeoIP database, port Tor to
25722 Windows CE, introduce new compile flags that improve code security,
25723 add an eighth v3 directory authority, and address a lot of more
25727 - Tor directory authorities no longer crash when started with a
25728 cached-microdesc-consensus file in their data directory. Bugfix
25729 on 0.2.2.6-alpha; fixes bug 1532.
25730 - Treat an unset $HOME like an empty $HOME rather than triggering an
25731 assert. Bugfix on 0.0.8pre1; fixes bug 1522.
25732 - Ignore negative and large circuit build timeout values that can
25733 happen during a suspend or hibernate. These values caused various
25734 asserts to fire. Bugfix on 0.2.2.2-alpha; fixes bug 1245.
25735 - Alter calculation of Pareto distribution parameter 'Xm' for
25736 Circuit Build Timeout learning to use the weighted average of the
25737 top N=3 modes (because we have three entry guards). Considering
25738 multiple modes should improve the timeout calculation in some cases,
25739 and prevent extremely high timeout values. Bugfix on 0.2.2.2-alpha;
25741 - Alter calculation of Pareto distribution parameter 'Alpha' to use a
25742 right censored distribution model. This approach improves over the
25743 synthetic timeout generation approach that was producing insanely
25744 high timeout values. Now we calculate build timeouts using truncated
25745 times. Bugfix on 0.2.2.2-alpha; fixes bugs 1245 and 1335.
25746 - Do not close circuits that are under construction when they reach
25747 the circuit build timeout. Instead, leave them building (but do not
25748 use them) for up until the time corresponding to the 95th percentile
25749 on the Pareto CDF or 60 seconds, whichever is greater. This is done
25750 to provide better data for the new Pareto model. This percentile
25751 can be controlled by the consensus.
25754 - Move to the June 2010 Maxmind GeoLite country db (rather than the
25755 June 2009 ip-to-country GeoIP db) for our statistics that count
25756 how many users relays are seeing from each country. Now we have
25757 more accurate data for many African countries.
25758 - Port Tor to build and run correctly on Windows CE systems, using
25759 the wcecompat library. Contributed by Valerio Lupi.
25760 - New "--enable-gcc-hardening" ./configure flag (off by default)
25761 to turn on gcc compile time hardening options. It ensures
25762 that signed ints have defined behavior (-fwrapv), enables
25763 -D_FORTIFY_SOURCE=2 (requiring -O2), adds stack smashing protection
25764 with canaries (-fstack-protector-all), turns on ASLR protection if
25765 supported by the kernel (-fPIE, -pie), and adds additional security
25766 related warnings. Verified to work on Mac OS X and Debian Lenny.
25767 - New "--enable-linker-hardening" ./configure flag (off by default)
25768 to turn on ELF specific hardening features (relro, now). This does
25769 not work with Mac OS X or any other non-ELF binary format.
25771 o New directory authorities:
25772 - Set up maatuska (run by Linus Nordberg) as the eighth v3 directory
25776 - New config option "WarnUnsafeSocks 0" disables the warning that
25777 occurs whenever Tor receives a socks handshake using a version of
25778 the socks protocol that can only provide an IP address (rather
25779 than a hostname). Setups that do DNS locally over Tor are fine,
25780 and we shouldn't spam the logs in that case.
25781 - Convert the HACKING file to asciidoc, and add a few new sections
25782 to it, explaining how we use Git, how we make changelogs, and
25783 what should go in a patch.
25784 - Add a TIMEOUT_RATE keyword to the BUILDTIMEOUT_SET control port
25785 event, to give information on the current rate of circuit timeouts
25786 over our stored history.
25787 - Add ability to disable circuit build time learning via consensus
25788 parameter and via a LearnCircuitBuildTimeout config option. Also
25789 automatically disable circuit build time calculation if we are
25790 either a AuthoritativeDirectory, or if we fail to write our state
25791 file. Fixes bug 1296.
25792 - More gracefully handle corrupt state files, removing asserts
25793 in favor of saving a backup and resetting state.
25794 - Rename the "log.h" header to "torlog.h" so as to conflict with fewer
25798 - Build correctly on OSX with zlib 1.2.4 and higher with all warnings
25800 - When a2x fails, mention that the user could disable manpages instead
25801 of trying to fix their asciidoc installation.
25802 - Where available, use Libevent 2.0's periodic timers so that our
25803 once-per-second cleanup code gets called even more closely to
25804 once per second than it would otherwise. Fixes bug 943.
25805 - If you run a bridge that listens on multiple IP addresses, and
25806 some user configures a bridge address that uses a different IP
25807 address than your bridge writes in its router descriptor, and the
25808 user doesn't specify an identity key, their Tor would discard the
25809 descriptor because "it isn't one of our configured bridges", and
25810 fail to bootstrap. Now believe the descriptor and bootstrap anyway.
25811 Bugfix on 0.2.0.3-alpha.
25812 - If OpenSSL fails to make a duplicate of a private or public key, log
25813 an error message and try to exit cleanly. May help with debugging
25814 if bug 1209 ever remanifests.
25815 - Save a couple bytes in memory allocation every time we escape
25816 certain characters in a string. Patch from Florian Zumbiehl.
25817 - Make it explicit that we don't cannibalize one-hop circuits. This
25818 happens in the wild, but doesn't turn out to be a problem because
25819 we fortunately don't use those circuits. Many thanks to outofwords
25820 for the initial analysis and to swissknife who confirmed that
25821 two-hop circuits are actually created.
25822 - Make directory mirrors report non-zero dirreq-v[23]-shares again.
25823 Fixes bug 1564; bugfix on 0.2.2.9-alpha.
25824 - Eliminate a case where a circuit build time warning was displayed
25825 after network connectivity resumed. Bugfix on 0.2.2.2-alpha.
25828 Changes in version 0.2.1.26 - 2010-05-02
25829 Tor 0.2.1.26 addresses the recent connection and memory overload
25830 problems we've been seeing on relays, especially relays with their
25831 DirPort open. If your relay has been crashing, or you turned it off
25832 because it used too many resources, give this release a try.
25834 This release also fixes yet another instance of broken OpenSSL libraries
25835 that was causing some relays to drop out of the consensus.
25838 - Teach relays to defend themselves from connection overload. Relays
25839 now close idle circuits early if it looks like they were intended
25840 for directory fetches. Relays are also more aggressive about closing
25841 TLS connections that have no circuits on them. Such circuits are
25842 unlikely to be re-used, and tens of thousands of them were piling
25843 up at the fast relays, causing the relays to run out of sockets
25844 and memory. Bugfix on 0.2.0.22-rc (where clients started tunneling
25845 their directory fetches over TLS).
25846 - Fix SSL renegotiation behavior on OpenSSL versions like on Centos
25847 that claim to be earlier than 0.9.8m, but which have in reality
25848 backported huge swaths of 0.9.8m or 0.9.8n renegotiation
25849 behavior. Possible fix for some cases of bug 1346.
25850 - Directory mirrors were fetching relay descriptors only from v2
25851 directory authorities, rather than v3 authorities like they should.
25852 Only 2 v2 authorities remain (compared to 7 v3 authorities), leading
25853 to a serious bottleneck. Bugfix on 0.2.0.9-alpha. Fixes bug 1324.
25856 - Finally get rid of the deprecated and now harmful notion of "clique
25857 mode", where directory authorities maintain TLS connections to
25861 - In the util/threads test, no longer free the test_mutex before all
25862 worker threads have finished. Bugfix on 0.2.1.6-alpha.
25863 - The master thread could starve the worker threads quite badly on
25864 certain systems, causing them to run only partially in the allowed
25865 window. This resulted in test failures. Now the master thread sleeps
25866 occasionally for a few microseconds while the two worker-threads
25867 compete for the mutex. Bugfix on 0.2.0.1-alpha.
25870 Changes in version 0.2.2.13-alpha - 2010-04-24
25871 Tor 0.2.2.13-alpha addresses the recent connection and memory overload
25872 problems we've been seeing on relays, especially relays with their
25873 DirPort open. If your relay has been crashing, or you turned it off
25874 because it used too many resources, give this release a try.
25877 - Teach relays to defend themselves from connection overload. Relays
25878 now close idle circuits early if it looks like they were intended
25879 for directory fetches. Relays are also more aggressive about closing
25880 TLS connections that have no circuits on them. Such circuits are
25881 unlikely to be re-used, and tens of thousands of them were piling
25882 up at the fast relays, causing the relays to run out of sockets
25883 and memory. Bugfix on 0.2.0.22-rc (where clients started tunneling
25884 their directory fetches over TLS).
25887 - Finally get rid of the deprecated and now harmful notion of "clique
25888 mode", where directory authorities maintain TLS connections to
25890 - Directory authorities now do an immediate reachability check as soon
25891 as they hear about a new relay. This change should slightly reduce
25892 the time between setting up a relay and getting listed as running
25893 in the consensus. It should also improve the time between setting
25894 up a bridge and seeing use by bridge users.
25895 - Directory authorities no longer launch a TLS connection to every
25896 relay as they startup. Now that we have 2k+ descriptors cached,
25897 the resulting network hiccup is becoming a burden. Besides,
25898 authorities already avoid voting about Running for the first half
25899 hour of their uptime.
25902 Changes in version 0.2.2.12-alpha - 2010-04-20
25903 Tor 0.2.2.12-alpha fixes a critical bug in how directory authorities
25904 handle and vote on descriptors. It was causing relays to drop out of
25908 - Many relays have been falling out of the consensus lately because
25909 not enough authorities know about their descriptor for them to get
25910 a majority of votes. When we deprecated the v2 directory protocol,
25911 we got rid of the only way that v3 authorities can hear from each
25912 other about other descriptors. Now authorities examine every v3
25913 vote for new descriptors, and fetch them from that authority. Bugfix
25915 - Fix two typos in tor_vasprintf() that broke the compile on Windows,
25916 and a warning in or.h related to bandwidth_weight_rule_t that
25917 prevented clean compile on OS X. Fixes bug 1363; bugfix on
25919 - Fix a segfault on relays when DirReqStatistics is enabled
25920 and 24 hours pass. Bug found by keb. Fixes bug 1365; bugfix on
25924 - Demote a confusing TLS warning that relay operators might get when
25925 someone tries to talk to their OrPort. It is neither the operator's
25926 fault nor can they do anything about it. Fixes bug 1364; bugfix
25930 Changes in version 0.2.2.11-alpha - 2010-04-15
25931 Tor 0.2.2.11-alpha fixes yet another instance of broken OpenSSL
25932 libraries that was causing some relays to drop out of the consensus.
25935 - Directory mirrors were fetching relay descriptors only from v2
25936 directory authorities, rather than v3 authorities like they should.
25937 Only 2 v2 authorities remain (compared to 7 v3 authorities), leading
25938 to a serious bottleneck. Bugfix on 0.2.0.9-alpha. Fixes bug 1324.
25939 - Fix a parsing error that made every possible value of
25940 CircPriorityHalflifeMsec get treated as "1 msec". Bugfix
25941 on 0.2.2.7-alpha. Rename CircPriorityHalflifeMsec to
25942 CircuitPriorityHalflifeMsec, so authorities can tell newer relays
25943 about the option without breaking older ones.
25944 - Fix SSL renegotiation behavior on OpenSSL versions like on Centos
25945 that claim to be earlier than 0.9.8m, but which have in reality
25946 backported huge swaths of 0.9.8m or 0.9.8n renegotiation
25947 behavior. Possible fix for some cases of bug 1346.
25950 - Experiment with a more aggressive approach to preventing clients
25951 from making one-hop exit streams. Exit relays who want to try it
25952 out can set "RefuseUnknownExits 1" in their torrc, and then look
25953 for "Attempt by %s to open a stream" log messages. Let us know
25955 - Add support for statically linking zlib by specifying
25956 --enable-static-zlib, to go with our support for statically linking
25957 openssl and libevent. Resolves bug 1358.
25960 - Fix a segfault that happens whenever a Tor client that is using
25961 libevent2's bufferevents gets a hup signal. Bugfix on 0.2.2.5-alpha;
25963 - When we cleaned up the contrib/tor-exit-notice.html file, we left
25964 out the first line. Fixes bug 1295.
25965 - When building the manpage from a tarball, we required asciidoc, but
25966 the asciidoc -> roff/html conversion was already done for the
25967 tarball. Make 'make' complain only when we need asciidoc (either
25968 because we're compiling directly from git, or because we altered
25969 the asciidoc manpage in the tarball). Bugfix on 0.2.2.9-alpha.
25970 - When none of the directory authorities vote on any params, Tor
25971 segfaulted when trying to make the consensus from the votes. We
25972 didn't trigger the bug in practice, because authorities do include
25973 params in their votes. Bugfix on 0.2.2.10-alpha; fixes bug 1322.
25976 - In the util/threads test, no longer free the test_mutex before all
25977 worker threads have finished. Bugfix on 0.2.1.6-alpha.
25978 - The master thread could starve the worker threads quite badly on
25979 certain systems, causing them to run only partially in the allowed
25980 window. This resulted in test failures. Now the master thread sleeps
25981 occasionally for a few microseconds while the two worker-threads
25982 compete for the mutex. Bugfix on 0.2.0.1-alpha.
25985 Changes in version 0.2.2.10-alpha - 2010-03-07
25986 Tor 0.2.2.10-alpha fixes a regression introduced in 0.2.2.9-alpha that
25987 could prevent relays from guessing their IP address correctly. It also
25988 starts the groundwork for another client-side performance boost, since
25989 currently we're not making efficient use of relays that have both the
25990 Guard flag and the Exit flag.
25993 - Fix a regression from our patch for bug 1244 that caused relays
25994 to guess their IP address incorrectly if they didn't set Address
25995 in their torrc and/or their address fails to resolve. Bugfix on
25996 0.2.2.9-alpha; fixes bug 1269.
25998 o Major features (performance):
25999 - Directory authorities now compute consensus weightings that instruct
26000 clients how to weight relays flagged as Guard, Exit, Guard+Exit,
26001 and no flag. Clients that use these weightings will distribute
26002 network load more evenly across these different relay types. The
26003 weightings are in the consensus so we can change them globally in
26004 the future. Extra thanks to "outofwords" for finding some nasty
26005 security bugs in the first implementation of this feature.
26007 o Minor features (performance):
26008 - Always perform router selections using weighted relay bandwidth,
26009 even if we don't need a high capacity circuit at the time. Non-fast
26010 circuits now only differ from fast ones in that they can use relays
26011 not marked with the Fast flag. This "feature" could turn out to
26012 be a horrible bug; we should investigate more before it goes into
26016 - Allow disabling building of the manpages. Skipping the manpage
26017 speeds up the build considerably.
26019 o Minor bugfixes (on 0.2.2.x):
26020 - Fix a memleak in the EXTENDCIRCUIT logic. Spotted by coverity.
26021 Bugfix on 0.2.2.9-alpha.
26022 - Disallow values larger than INT32_MAX for PerConnBWRate|Burst
26023 config option. Bugfix on 0.2.2.7-alpha.
26024 - Ship the asciidoc-helper file in the tarball, so that people can
26025 build from source if they want to, and touching the .1.txt files
26026 doesn't break the build. Bugfix on 0.2.2.9-alpha.
26028 o Minor bugfixes (on 0.2.1.x or earlier):
26029 - Fix a dereference-then-NULL-check sequence when publishing
26030 descriptors. Bugfix on 0.2.1.5-alpha. Discovered by ekir; fixes
26032 - Fix another dereference-then-NULL-check sequence. Bugfix on
26033 0.2.1.14-rc. Discovered by ekir; fixes bug 1256.
26034 - Make sure we treat potentially not NUL-terminated strings correctly.
26035 Bugfix on 0.1.1.13-alpha. Discovered by rieo; fixes bug 1257.
26037 o Code simplifications and refactoring:
26038 - Fix some urls in the exit notice file and make it XHTML1.1 strict
26039 compliant. Based on a patch from Christian Kujau.
26040 - Don't use sed in asciidoc-helper anymore.
26041 - Make the build process fail if asciidoc cannot be found and
26042 building with asciidoc isn't disabled.
26045 Changes in version 0.2.2.9-alpha - 2010-02-22
26046 Tor 0.2.2.9-alpha makes Tor work again on the latest OS X, updates the
26047 location of a directory authority, and cleans up a bunch of small bugs.
26049 o Directory authority changes:
26050 - Change IP address for dannenberg (v3 directory authority), and
26051 remove moria2 (obsolete v1, v2 directory authority and v0 hidden
26052 service directory authority) from the list.
26055 - Make Tor work again on the latest OS X: when deciding whether to
26056 use strange flags to turn TLS renegotiation on, detect the OpenSSL
26057 version at run-time, not compile time. We need to do this because
26058 Apple doesn't update its dev-tools headers when it updates its
26059 libraries in a security patch.
26060 - Fix a potential buffer overflow in lookup_last_hid_serv_request()
26061 that could happen on 32-bit platforms with 64-bit time_t. Also fix
26062 a memory leak when requesting a hidden service descriptor we've
26063 requested before. Fixes bug 1242, bugfix on 0.2.0.18-alpha. Found
26065 - Authorities could be tricked into giving out the Exit flag to relays
26066 that didn't allow exiting to any ports. This bug could screw
26067 with load balancing and stats. Bugfix on 0.1.1.6-alpha; fixes bug
26068 1238. Bug discovered by Martin Kowalczyk.
26069 - When freeing a session key, zero it out completely. We only zeroed
26070 the first ptrsize bytes. Bugfix on 0.0.2pre8. Discovered and
26071 patched by ekir. Fixes bug 1254.
26074 - Fix static compilation by listing the openssl libraries in the right
26075 order. Bugfix on Tor 0.2.2.8-alpha; fixes bug 1237.
26076 - Resume handling .exit hostnames in a special way: originally we
26077 stripped the .exit part and used the requested exit relay. In
26078 0.2.2.1-alpha we stopped treating them in any special way, meaning
26079 if you use a .exit address then Tor will pass it on to the exit
26080 relay. Now we reject the .exit stream outright, since that behavior
26081 might be more expected by the user. Found and diagnosed by Scott
26082 Bennett and Downie on or-talk.
26083 - Don't spam the controller with events when we have no file
26084 descriptors available. Bugfix on 0.2.1.5-alpha. (Rate-limiting
26085 for log messages was already solved from bug 748.)
26086 - Avoid a bogus overlapped memcpy in tor_addr_copy(). Reported by
26088 - Make the DNSPort option work with libevent 2.x. Don't alter the
26089 behavior for libevent 1.x. Fixes bug 1143. Found by SwissTorExit.
26090 - Emit a GUARD DROPPED controller event for a case we missed.
26091 - Make more fields in the controller protocol case-insensitive, since
26092 control-spec.txt said they were.
26093 - Refactor resolve_my_address() to not use gethostbyname() anymore.
26094 Fixes bug 1244; bugfix on 0.0.2pre25. Reported by Mike Mestnik.
26095 - Fix a spec conformance issue: the network-status-version token
26096 must be the first token in a v3 consensus or vote. Discovered by
26097 parakeep. Bugfix on 0.2.0.3-alpha.
26099 o Code simplifications and refactoring:
26100 - Generate our manpage and HTML documentation using Asciidoc. This
26101 change should make it easier to maintain the documentation, and
26102 produce nicer HTML.
26103 - Remove the --enable-iphone option. According to reports from Marco
26104 Bonetti, Tor builds fine without any special tweaking on recent
26105 iPhone SDK versions.
26106 - Removed some unnecessary files from the source distribution. The
26107 AUTHORS file has now been merged into the people page on the
26108 website. The roadmaps and design doc can now be found in the
26109 projects directory in svn.
26110 - Enabled various circuit build timeout constants to be controlled
26111 by consensus parameters. Also set better defaults for these
26112 parameters based on experimentation on broadband and simulated
26113 high latency links.
26116 - The 'EXTENDCIRCUIT' control port command can now be used with
26117 a circ id of 0 and no path. This feature will cause Tor to build
26118 a new 'fast' general purpose circuit using its own path selection
26120 - Added a BUILDTIMEOUT_SET controller event to describe changes
26121 to the circuit build timeout.
26122 - Future-proof the controller protocol a bit by ignoring keyword
26123 arguments we do not recognize.
26124 - Expand homedirs passed to tor-checkkey. This should silence a
26125 coverity complaint about passing a user-supplied string into
26126 open() without checking it.
26129 Changes in version 0.2.1.25 - 2010-03-16
26130 Tor 0.2.1.25 fixes a regression introduced in 0.2.1.23 that could
26131 prevent relays from guessing their IP address correctly. It also fixes
26132 several minor potential security bugs.
26135 - Fix a regression from our patch for bug 1244 that caused relays
26136 to guess their IP address incorrectly if they didn't set Address
26137 in their torrc and/or their address fails to resolve. Bugfix on
26138 0.2.1.23; fixes bug 1269.
26139 - When freeing a session key, zero it out completely. We only zeroed
26140 the first ptrsize bytes. Bugfix on 0.0.2pre8. Discovered and
26141 patched by ekir. Fixes bug 1254.
26144 - Fix a dereference-then-NULL-check sequence when publishing
26145 descriptors. Bugfix on 0.2.1.5-alpha. Discovered by ekir; fixes
26147 - Fix another dereference-then-NULL-check sequence. Bugfix on
26148 0.2.1.14-rc. Discovered by ekir; fixes bug 1256.
26149 - Make sure we treat potentially not NUL-terminated strings correctly.
26150 Bugfix on 0.1.1.13-alpha. Discovered by rieo; fixes bug 1257.
26154 Changes in version 0.2.1.24 - 2010-02-21
26155 Tor 0.2.1.24 makes Tor work again on the latest OS X -- this time
26159 - Work correctly out-of-the-box with even more vendor-patched versions
26160 of OpenSSL. In particular, make it so Debian and OS X don't need
26161 customized patches to run/build.
26164 Changes in version 0.2.1.23 - 2010-02-13
26165 Tor 0.2.1.23 fixes a huge client-side performance bug, makes Tor work
26166 again on the latest OS X, and updates the location of a directory
26169 o Major bugfixes (performance):
26170 - We were selecting our guards uniformly at random, and then weighting
26171 which of our guards we'd use uniformly at random. This imbalance
26172 meant that Tor clients were severely limited on throughput (and
26173 probably latency too) by the first hop in their circuit. Now we
26174 select guards weighted by currently advertised bandwidth. We also
26175 automatically discard guards picked using the old algorithm. Fixes
26176 bug 1217; bugfix on 0.2.1.3-alpha. Found by Mike Perry.
26179 - Make Tor work again on the latest OS X: when deciding whether to
26180 use strange flags to turn TLS renegotiation on, detect the OpenSSL
26181 version at run-time, not compile time. We need to do this because
26182 Apple doesn't update its dev-tools headers when it updates its
26183 libraries in a security patch.
26184 - Fix a potential buffer overflow in lookup_last_hid_serv_request()
26185 that could happen on 32-bit platforms with 64-bit time_t. Also fix
26186 a memory leak when requesting a hidden service descriptor we've
26187 requested before. Fixes bug 1242, bugfix on 0.2.0.18-alpha. Found
26190 o Directory authority changes:
26191 - Change IP address for dannenberg (v3 directory authority), and
26192 remove moria2 (obsolete v1, v2 directory authority and v0 hidden
26193 service directory authority) from the list.
26196 - Refactor resolve_my_address() to not use gethostbyname() anymore.
26197 Fixes bug 1244; bugfix on 0.0.2pre25. Reported by Mike Mestnik.
26200 - Avoid a mad rush at the beginning of each month when each client
26201 rotates half of its guards. Instead we spread the rotation out
26202 throughout the month, but we still avoid leaving a precise timestamp
26203 in the state file about when we first picked the guard. Improves
26204 over the behavior introduced in 0.1.2.17.
26207 Changes in version 0.2.2.8-alpha - 2010-01-26
26208 Tor 0.2.2.8-alpha fixes a crash bug in 0.2.2.7-alpha that has been
26209 causing bridge relays to disappear. If you're running a bridge,
26213 - Fix a memory corruption bug on bridges that occurred during the
26214 inclusion of stats data in extra-info descriptors. Also fix the
26215 interface for geoip_get_bridge_stats* to prevent similar bugs in
26216 the future. Diagnosis by Tas, patch by Karsten and Sebastian.
26217 Fixes bug 1208; bugfix on 0.2.2.7-alpha.
26220 - Ignore OutboundBindAddress when connecting to localhost.
26221 Connections to localhost need to come _from_ localhost, or else
26222 local servers (like DNS and outgoing HTTP/SOCKS proxies) will often
26226 Changes in version 0.2.2.7-alpha - 2010-01-19
26227 Tor 0.2.2.7-alpha fixes a huge client-side performance bug, as well
26228 as laying the groundwork for further relay-side performance fixes. It
26229 also starts cleaning up client behavior with respect to the EntryNodes,
26230 ExitNodes, and StrictNodes config options.
26232 This release also rotates two directory authority keys, due to a
26233 security breach of some of the Torproject servers.
26235 o Directory authority changes:
26236 - Rotate keys (both v3 identity and relay identity) for moria1
26239 o Major features (performance):
26240 - We were selecting our guards uniformly at random, and then weighting
26241 which of our guards we'd use uniformly at random. This imbalance
26242 meant that Tor clients were severely limited on throughput (and
26243 probably latency too) by the first hop in their circuit. Now we
26244 select guards weighted by currently advertised bandwidth. We also
26245 automatically discard guards picked using the old algorithm. Fixes
26246 bug 1217; bugfix on 0.2.1.3-alpha. Found by Mike Perry.
26247 - When choosing which cells to relay first, relays can now favor
26248 circuits that have been quiet recently, to provide lower latency
26249 for low-volume circuits. By default, relays enable or disable this
26250 feature based on a setting in the consensus. You can override
26251 this default by using the new "CircuitPriorityHalflife" config
26252 option. Design and code by Ian Goldberg, Can Tang, and Chris
26254 - Add separate per-conn write limiting to go with the per-conn read
26255 limiting. We added a global write limit in Tor 0.1.2.5-alpha,
26256 but never per-conn write limits.
26257 - New consensus params "bwconnrate" and "bwconnburst" to let us
26258 rate-limit client connections as they enter the network. It's
26259 controlled in the consensus so we can turn it on and off for
26260 experiments. It's starting out off. Based on proposal 163.
26262 o Major features (relay selection options):
26263 - Switch to a StrictNodes config option, rather than the previous
26264 "StrictEntryNodes" / "StrictExitNodes" separation that was missing a
26265 "StrictExcludeNodes" option.
26266 - If EntryNodes, ExitNodes, ExcludeNodes, or ExcludeExitNodes
26267 change during a config reload, mark and discard all our origin
26268 circuits. This fix should address edge cases where we change the
26269 config options and but then choose a circuit that we created before
26271 - If EntryNodes or ExitNodes are set, be more willing to use an
26272 unsuitable (e.g. slow or unstable) circuit. The user asked for it,
26274 - Make EntryNodes config option much more aggressive even when
26275 StrictNodes is not set. Before it would prepend your requested
26276 entrynodes to your list of guard nodes, but feel free to use others
26277 after that. Now it chooses only from your EntryNodes if any of
26278 those are available, and only falls back to others if a) they're
26279 all down and b) StrictNodes is not set.
26280 - Now we refresh your entry guards from EntryNodes at each consensus
26281 fetch -- rather than just at startup and then they slowly rot as
26282 the network changes.
26285 - Stop bridge directory authorities from answering dbg-stability.txt
26286 directory queries, which would let people fetch a list of all
26287 bridge identities they track. Bugfix on 0.2.1.6-alpha.
26290 - Log a notice when we get a new control connection. Now it's easier
26291 for security-conscious users to recognize when a local application
26292 is knocking on their controller door. Suggested by bug 1196.
26293 - New config option "CircuitStreamTimeout" to override our internal
26294 timeout schedule for how many seconds until we detach a stream from
26295 a circuit and try a new circuit. If your network is particularly
26296 slow, you might want to set this to a number like 60.
26297 - New controller command "getinfo config-text". It returns the
26298 contents that Tor would write if you send it a SAVECONF command,
26299 so the controller can write the file to disk itself.
26300 - New options for SafeLogging to allow scrubbing only log messages
26301 generated while acting as a relay.
26302 - Ship the bridges spec file in the tarball too.
26303 - Avoid a mad rush at the beginning of each month when each client
26304 rotates half of its guards. Instead we spread the rotation out
26305 throughout the month, but we still avoid leaving a precise timestamp
26306 in the state file about when we first picked the guard. Improves
26307 over the behavior introduced in 0.1.2.17.
26309 o Minor bugfixes (compiling):
26310 - Fix compilation on OS X 10.3, which has a stub mlockall() but
26311 hides it. Bugfix on 0.2.2.6-alpha.
26312 - Fix compilation on Solaris by removing support for the
26313 DisableAllSwap config option. Solaris doesn't have an rlimit for
26314 mlockall, so we cannot use it safely. Fixes bug 1198; bugfix on
26317 o Minor bugfixes (crashes):
26318 - Do not segfault when writing buffer stats when we haven't observed
26319 a single circuit to report about. Found by Fabian Lanze. Bugfix on
26321 - If we're in the pathological case where there's no exit bandwidth
26322 but there is non-exit bandwidth, or no guard bandwidth but there
26323 is non-guard bandwidth, don't crash during path selection. Bugfix
26325 - Fix an impossible-to-actually-trigger buffer overflow in relay
26326 descriptor generation. Bugfix on 0.1.0.15.
26328 o Minor bugfixes (privacy):
26329 - Fix an instance where a Tor directory mirror might accidentally
26330 log the IP address of a misbehaving Tor client. Bugfix on
26332 - Don't list Windows capabilities in relay descriptors. We never made
26333 use of them, and maybe it's a bad idea to publish them. Bugfix
26336 o Minor bugfixes (other):
26337 - Resolve an edge case in path weighting that could make us misweight
26338 our relay selection. Fixes bug 1203; bugfix on 0.0.8rc1.
26339 - Fix statistics on client numbers by country as seen by bridges that
26340 were broken in 0.2.2.1-alpha. Also switch to reporting full 24-hour
26341 intervals instead of variable 12-to-48-hour intervals.
26342 - After we free an internal connection structure, overwrite it
26343 with a different memory value than we use for overwriting a freed
26344 internal circuit structure. Should help with debugging. Suggested
26346 - Update our OpenSSL 0.9.8l fix so that it works with OpenSSL 0.9.8m
26349 o Removed features:
26350 - Remove the HSAuthorityRecordStats option that version 0 hidden
26351 service authorities could have used to track statistics of overall
26352 hidden service usage.
26355 Changes in version 0.2.1.22 - 2010-01-19
26356 Tor 0.2.1.22 fixes a critical privacy problem in bridge directory
26357 authorities -- it would tell you its whole history of bridge descriptors
26358 if you make the right directory request. This stable update also
26359 rotates two of the seven v3 directory authority keys and locations.
26361 o Directory authority changes:
26362 - Rotate keys (both v3 identity and relay identity) for moria1
26366 - Stop bridge directory authorities from answering dbg-stability.txt
26367 directory queries, which would let people fetch a list of all
26368 bridge identities they track. Bugfix on 0.2.1.6-alpha.
26371 Changes in version 0.2.1.21 - 2009-12-21
26372 Tor 0.2.1.21 fixes an incompatibility with the most recent OpenSSL
26373 library. If you use Tor on Linux / Unix and you're getting SSL
26374 renegotiation errors, upgrading should help. We also recommend an
26375 upgrade if you're an exit relay.
26378 - Work around a security feature in OpenSSL 0.9.8l that prevents our
26379 handshake from working unless we explicitly tell OpenSSL that we
26380 are using SSL renegotiation safely. We are, of course, but OpenSSL
26381 0.9.8l won't work unless we say we are.
26382 - Avoid crashing if the client is trying to upload many bytes and the
26383 circuit gets torn down at the same time, or if the flip side
26384 happens on the exit relay. Bugfix on 0.2.0.1-alpha; fixes bug 1150.
26387 - Do not refuse to learn about authority certs and v2 networkstatus
26388 documents that are older than the latest consensus. This bug might
26389 have degraded client bootstrapping. Bugfix on 0.2.0.10-alpha.
26390 Spotted and fixed by xmux.
26391 - Fix a couple of very-hard-to-trigger memory leaks, and one hard-to-
26392 trigger platform-specific option misparsing case found by Coverity
26394 - Fix a compilation warning on Fedora 12 by removing an impossible-to-
26395 trigger assert. Fixes bug 1173.
26398 Changes in version 0.2.2.6-alpha - 2009-11-19
26399 Tor 0.2.2.6-alpha lays the groundwork for many upcoming features:
26400 support for the new lower-footprint "microdescriptor" directory design,
26401 future-proofing our consensus format against new hash functions or
26402 other changes, and an Android port. It also makes Tor compatible with
26403 the upcoming OpenSSL 0.9.8l release, and fixes a variety of bugs.
26406 - Directory authorities can now create, vote on, and serve multiple
26407 parallel formats of directory data as part of their voting process.
26408 Partially implements Proposal 162: "Publish the consensus in
26410 - Directory authorities can now agree on and publish small summaries
26411 of router information that clients can use in place of regular
26412 server descriptors. This transition will eventually allow clients
26413 to use far less bandwidth for downloading information about the
26414 network. Begins the implementation of Proposal 158: "Clients
26415 download consensus + microdescriptors".
26416 - The directory voting system is now extensible to use multiple hash
26417 algorithms for signatures and resource selection. Newer formats
26418 are signed with SHA256, with a possibility for moving to a better
26419 hash algorithm in the future.
26420 - New DisableAllSwap option. If set to 1, Tor will attempt to lock all
26421 current and future memory pages via mlockall(). On supported
26422 platforms (modern Linux and probably BSD but not Windows or OS X),
26423 this should effectively disable any and all attempts to page out
26424 memory. This option requires that you start your Tor as root --
26425 if you use DisableAllSwap, please consider using the User option
26426 to properly reduce the privileges of your Tor.
26427 - Numerous changes, bugfixes, and workarounds from Nathan Freitas
26428 to help Tor build correctly for Android phones.
26431 - Work around a security feature in OpenSSL 0.9.8l that prevents our
26432 handshake from working unless we explicitly tell OpenSSL that we
26433 are using SSL renegotiation safely. We are, but OpenSSL 0.9.8l
26434 won't work unless we say we are.
26437 - Fix a crash bug when trying to initialize the evdns module in
26438 Libevent 2. Bugfix on 0.2.1.16-rc.
26439 - Stop logging at severity 'warn' when some other Tor client tries
26440 to establish a circuit with us using weak DH keys. It's a protocol
26441 violation, but that doesn't mean ordinary users need to hear about
26442 it. Fixes the bug part of bug 1114. Bugfix on 0.1.0.13.
26443 - Do not refuse to learn about authority certs and v2 networkstatus
26444 documents that are older than the latest consensus. This bug might
26445 have degraded client bootstrapping. Bugfix on 0.2.0.10-alpha.
26446 Spotted and fixed by xmux.
26447 - Fix numerous small code-flaws found by Coverity Scan Rung 3.
26448 - If all authorities restart at once right before a consensus vote,
26449 nobody will vote about "Running", and clients will get a consensus
26450 with no usable relays. Instead, authorities refuse to build a
26451 consensus if this happens. Bugfix on 0.2.0.10-alpha; fixes bug 1066.
26452 - If your relay can't keep up with the number of incoming create
26453 cells, it would log one warning per failure into your logs. Limit
26454 warnings to 1 per minute. Bugfix on 0.0.2pre10; fixes bug 1042.
26455 - Bridges now use "reject *:*" as their default exit policy. Bugfix
26456 on 0.2.0.3-alpha; fixes bug 1113.
26457 - Fix a memory leak on directory authorities during voting that was
26458 introduced in 0.2.2.1-alpha. Found via valgrind.
26461 Changes in version 0.2.1.20 - 2009-10-15
26462 Tor 0.2.1.20 fixes a crash bug when you're accessing many hidden
26463 services at once, prepares for more performance improvements, and
26464 fixes a bunch of smaller bugs.
26466 The Windows and OS X bundles also include a more recent Vidalia,
26467 and switch from Privoxy to Polipo.
26469 The OS X installers are now drag and drop. It's best to un-install
26470 Tor/Vidalia and then install this new bundle, rather than upgrade. If
26471 you want to upgrade, you'll need to update the paths for Tor and Polipo
26472 in the Vidalia Settings window.
26475 - Send circuit or stream sendme cells when our window has decreased
26476 by 100 cells, not when it has decreased by 101 cells. Bug uncovered
26477 by Karsten when testing the "reduce circuit window" performance
26478 patch. Bugfix on the 54th commit on Tor -- from July 2002,
26479 before the release of Tor 0.0.0. This is the new winner of the
26481 - Fix a remotely triggerable memory leak when a consensus document
26482 contains more than one signature from the same voter. Bugfix on
26484 - Avoid segfault in rare cases when finishing an introduction circuit
26485 as a client and finding out that we don't have an introduction key
26486 for it. Fixes bug 1073. Reported by Aaron Swartz.
26489 - Tor now reads the "circwindow" parameter out of the consensus,
26490 and uses that value for its circuit package window rather than the
26491 default of 1000 cells. Begins the implementation of proposal 168.
26493 o New directory authorities:
26494 - Set up urras (run by Jacob Appelbaum) as the seventh v3 directory
26496 - Move moria1 and tonga to alternate IP addresses.
26499 - Fix a signed/unsigned compile warning in 0.2.1.19.
26500 - Fix possible segmentation fault on directory authorities. Bugfix on
26502 - Fix an extremely rare infinite recursion bug that could occur if
26503 we tried to log a message after shutting down the log subsystem.
26504 Found by Matt Edman. Bugfix on 0.2.0.16-alpha.
26505 - Fix an obscure bug where hidden services on 64-bit big-endian
26506 systems might mis-read the timestamp in v3 introduce cells, and
26507 refuse to connect back to the client. Discovered by "rotor".
26508 Bugfix on 0.2.1.6-alpha.
26509 - We were triggering a CLOCK_SKEW controller status event whenever
26510 we connect via the v2 connection protocol to any relay that has
26511 a wrong clock. Instead, we should only inform the controller when
26512 it's a trusted authority that claims our clock is wrong. Bugfix
26513 on 0.2.0.20-rc; starts to fix bug 1074. Reported by SwissTorExit.
26514 - We were telling the controller about CHECKING_REACHABILITY and
26515 REACHABILITY_FAILED status events whenever we launch a testing
26516 circuit or notice that one has failed. Instead, only tell the
26517 controller when we want to inform the user of overall success or
26518 overall failure. Bugfix on 0.1.2.6-alpha. Fixes bug 1075. Reported
26520 - Don't warn when we're using a circuit that ends with a node
26521 excluded in ExcludeExitNodes, but the circuit is not used to access
26522 the outside world. This should help fix bug 1090. Bugfix on
26524 - Work around a small memory leak in some versions of OpenSSL that
26525 stopped the memory used by the hostname TLS extension from being
26529 - Add a "getinfo status/accepted-server-descriptor" controller
26530 command, which is the recommended way for controllers to learn
26531 whether our server descriptor has been successfully received by at
26532 least on directory authority. Un-recommend good-server-descriptor
26533 getinfo and status events until we have a better design for them.
26536 Changes in version 0.2.2.5-alpha - 2009-10-11
26537 Tor 0.2.2.5-alpha fixes a few compile problems in 0.2.2.4-alpha.
26540 - Make the tarball compile again. Oops. Bugfix on 0.2.2.4-alpha.
26542 o Directory authorities:
26543 - Temporarily (just for this release) move dizum to an alternate
26547 Changes in version 0.2.2.4-alpha - 2009-10-10
26548 Tor 0.2.2.4-alpha fixes more crash bugs in 0.2.2.2-alpha. It also
26549 introduces a new unit test framework, shifts directry authority
26550 addresses around to reduce the impact from recent blocking events,
26551 and fixes a few smaller bugs.
26554 - Fix several more asserts in the circuit_build_times code, for
26555 example one that causes Tor to fail to start once we have
26556 accumulated 5000 build times in the state file. Bugfixes on
26557 0.2.2.2-alpha; fixes bug 1108.
26559 o New directory authorities:
26560 - Move moria1 and Tonga to alternate IP addresses.
26563 - Log SSL state transitions at debug level during handshake, and
26564 include SSL states in error messages. This may help debug future
26565 SSL handshake issues.
26566 - Add a new "Handshake" log domain for activities that happen
26567 during the TLS handshake.
26568 - Revert to the "June 3 2009" ip-to-country file. The September one
26569 seems to have removed most US IP addresses.
26570 - Directory authorities now reject Tor relays with versions less than
26571 0.1.2.14. This step cuts out four relays from the current network,
26572 none of which are very big.
26575 - Fix a couple of smaller issues with gathering statistics. Bugfixes
26577 - Fix two memory leaks in the error case of
26578 circuit_build_times_parse_state(). Bugfix on 0.2.2.2-alpha.
26579 - Don't count one-hop circuits when we're estimating how long it
26580 takes circuits to build on average. Otherwise we'll set our circuit
26581 build timeout lower than we should. Bugfix on 0.2.2.2-alpha.
26582 - Directory authorities no longer change their opinion of, or vote on,
26583 whether a router is Running, unless they have themselves been
26584 online long enough to have some idea. Bugfix on 0.2.0.6-alpha.
26587 o Code simplifications and refactoring:
26588 - Revise our unit tests to use the "tinytest" framework, so we
26589 can run tests in their own processes, have smarter setup/teardown
26590 code, and so on. The unit test code has moved to its own
26591 subdirectory, and has been split into multiple modules.
26594 Changes in version 0.2.2.3-alpha - 2009-09-23
26595 Tor 0.2.2.3-alpha fixes a few crash bugs in 0.2.2.2-alpha.
26598 - Fix an overzealous assert in our new circuit build timeout code.
26599 Bugfix on 0.2.2.2-alpha; fixes bug 1103.
26602 - If the networkstatus consensus tells us that we should use a
26603 negative circuit package window, ignore it. Otherwise we'll
26604 believe it and then trigger an assert. Bugfix on 0.2.2.2-alpha.
26607 Changes in version 0.2.2.2-alpha - 2009-09-21
26608 Tor 0.2.2.2-alpha introduces our latest performance improvement for
26609 clients: Tor tracks the average time it takes to build a circuit, and
26610 avoids using circuits that take too long to build. For fast connections,
26611 this feature can cut your expected latency in half. For slow or flaky
26612 connections, it could ruin your Tor experience. Let us know if it does!
26615 - Tor now tracks how long it takes to build client-side circuits
26616 over time, and adapts its timeout to local network performance.
26617 Since a circuit that takes a long time to build will also provide
26618 bad performance, we get significant latency improvements by
26619 discarding the slowest 20% of circuits. Specifically, Tor creates
26620 circuits more aggressively than usual until it has enough data
26621 points for a good timeout estimate. Implements proposal 151.
26622 We are especially looking for reports (good and bad) from users with
26623 both EDGE and broadband connections that can move from broadband
26624 to EDGE and find out if the build-time data in the .tor/state gets
26625 reset without loss of Tor usability. You should also see a notice
26626 log message telling you that Tor has reset its timeout.
26627 - Directory authorities can now vote on arbitrary integer values as
26628 part of the consensus process. This is designed to help set
26629 network-wide parameters. Implements proposal 167.
26630 - Tor now reads the "circwindow" parameter out of the consensus,
26631 and uses that value for its circuit package window rather than the
26632 default of 1000 cells. Begins the implementation of proposal 168.
26635 - Fix a remotely triggerable memory leak when a consensus document
26636 contains more than one signature from the same voter. Bugfix on
26640 - Fix an extremely rare infinite recursion bug that could occur if
26641 we tried to log a message after shutting down the log subsystem.
26642 Found by Matt Edman. Bugfix on 0.2.0.16-alpha.
26643 - Fix parsing for memory or time units given without a space between
26644 the number and the unit. Bugfix on 0.2.2.1-alpha; fixes bug 1076.
26645 - A networkstatus vote must contain exactly one signature. Spec
26646 conformance issue. Bugfix on 0.2.0.3-alpha.
26647 - Fix an obscure bug where hidden services on 64-bit big-endian
26648 systems might mis-read the timestamp in v3 introduce cells, and
26649 refuse to connect back to the client. Discovered by "rotor".
26650 Bugfix on 0.2.1.6-alpha.
26651 - We were triggering a CLOCK_SKEW controller status event whenever
26652 we connect via the v2 connection protocol to any relay that has
26653 a wrong clock. Instead, we should only inform the controller when
26654 it's a trusted authority that claims our clock is wrong. Bugfix
26655 on 0.2.0.20-rc; starts to fix bug 1074. Reported by SwissTorExit.
26656 - We were telling the controller about CHECKING_REACHABILITY and
26657 REACHABILITY_FAILED status events whenever we launch a testing
26658 circuit or notice that one has failed. Instead, only tell the
26659 controller when we want to inform the user of overall success or
26660 overall failure. Bugfix on 0.1.2.6-alpha. Fixes bug 1075. Reported
26662 - Don't warn when we're using a circuit that ends with a node
26663 excluded in ExcludeExitNodes, but the circuit is not used to access
26664 the outside world. This should help fix bug 1090, but more problems
26665 remain. Bugfix on 0.2.1.6-alpha.
26666 - Work around a small memory leak in some versions of OpenSSL that
26667 stopped the memory used by the hostname TLS extension from being
26669 - Make our 'torify' script more portable; if we have only one of
26670 'torsocks' or 'tsocks' installed, don't complain to the user;
26671 and explain our warning about tsocks better.
26674 - Add a "getinfo status/accepted-server-descriptor" controller
26675 command, which is the recommended way for controllers to learn
26676 whether our server descriptor has been successfully received by at
26677 least on directory authority. Un-recommend good-server-descriptor
26678 getinfo and status events until we have a better design for them.
26679 - Update to the "September 4 2009" ip-to-country file.
26682 Changes in version 0.2.2.1-alpha - 2009-08-26
26683 Tor 0.2.2.1-alpha disables ".exit" address notation by default, allows
26684 Tor clients to bootstrap on networks where only port 80 is reachable,
26685 makes it more straightforward to support hardware crypto accelerators,
26686 and starts the groundwork for gathering stats safely at relays.
26689 - Start the process of disabling ".exit" address notation, since it
26690 can be used for a variety of esoteric application-level attacks
26691 on users. To reenable it, set "AllowDotExit 1" in your torrc. Fix
26694 o New directory authorities:
26695 - Set up urras (run by Jacob Appelbaum) as the seventh v3 directory
26699 - New AccelName and AccelDir options add support for dynamic OpenSSL
26700 hardware crypto acceleration engines.
26701 - Tor now supports tunneling all of its outgoing connections over
26702 a SOCKS proxy, using the SOCKS4Proxy and/or SOCKS5Proxy
26703 configuration options. Code by Christopher Davis.
26706 - Send circuit or stream sendme cells when our window has decreased
26707 by 100 cells, not when it has decreased by 101 cells. Bug uncovered
26708 by Karsten when testing the "reduce circuit window" performance
26709 patch. Bugfix on the 54th commit on Tor -- from July 2002,
26710 before the release of Tor 0.0.0. This is the new winner of the
26713 o New options for gathering stats safely:
26714 - Directory mirrors that set "DirReqStatistics 1" write statistics
26715 about directory requests to disk every 24 hours. As compared to the
26716 --enable-geoip-stats flag in 0.2.1.x, there are a few improvements:
26717 1) stats are written to disk exactly every 24 hours; 2) estimated
26718 shares of v2 and v3 requests are determined as mean values, not at
26719 the end of a measurement period; 3) unresolved requests are listed
26720 with country code '??'; 4) directories also measure download times.
26721 - Exit nodes that set "ExitPortStatistics 1" write statistics on the
26722 number of exit streams and transferred bytes per port to disk every
26724 - Relays that set "CellStatistics 1" write statistics on how long
26725 cells spend in their circuit queues to disk every 24 hours.
26726 - Entry nodes that set "EntryStatistics 1" write statistics on the
26727 rough number and origins of connecting clients to disk every 24
26729 - Relays that write any of the above statistics to disk and set
26730 "ExtraInfoStatistics 1" include the past 24 hours of statistics in
26731 their extra-info documents.
26734 - New --digests command-line switch to output the digests of the
26735 source files Tor was built with.
26736 - The "torify" script now uses torsocks where available.
26737 - The memarea code now uses a sentinel value at the end of each area
26738 to make sure nothing writes beyond the end of an area. This might
26739 help debug some conceivable causes of bug 930.
26740 - Time and memory units in the configuration file can now be set to
26741 fractional units. For example, "2.5 GB" is now a valid value for
26743 - Certain Tor clients (such as those behind check.torproject.org) may
26744 want to fetch the consensus in an extra early manner. To enable this
26745 a user may now set FetchDirInfoExtraEarly to 1. This also depends on
26746 setting FetchDirInfoEarly to 1. Previous behavior will stay the same
26747 as only certain clients who must have this information sooner should
26749 - Instead of adding the svn revision to the Tor version string, report
26750 the git commit (when we're building from a git checkout).
26753 - If any of the v3 certs we download are unparseable, we should
26754 actually notice the failure so we don't retry indefinitely. Bugfix
26755 on 0.2.0.x; reported by "rotator".
26756 - If the cached cert file is unparseable, warn but don't exit.
26757 - Fix possible segmentation fault on directory authorities. Bugfix on
26759 - When Tor fails to parse a descriptor of any kind, dump it to disk.
26760 Might help diagnosing bug 1051.
26762 o Deprecated and removed features:
26763 - The controller no longer accepts the old obsolete "addr-mappings/"
26764 or "unregistered-servers-" GETINFO values.
26765 - Hidden services no longer publish version 0 descriptors, and clients
26766 do not request or use version 0 descriptors. However, the old hidden
26767 service authorities still accept and serve version 0 descriptors
26768 when contacted by older hidden services/clients.
26769 - The EXTENDED_EVENTS and VERBOSE_NAMES controller features are now
26770 always on; using them is necessary for correct forward-compatible
26772 - Remove support for .noconnect style addresses. Nobody was using
26773 them, and they provided another avenue for detecting Tor users
26774 via application-level web tricks.
26776 o Packaging changes:
26777 - Upgrade Vidalia from 0.1.15 to 0.2.3 in the Windows and OS X
26778 installer bundles. See
26779 https://trac.vidalia-project.net/browser/vidalia/tags/vidalia-0.2.3/CHANGELOG
26780 for details of what's new in Vidalia 0.2.3.
26781 - Windows Vidalia Bundle: update Privoxy from 3.0.6 to 3.0.14-beta.
26782 - OS X Vidalia Bundle: move to Polipo 1.0.4 with Tor specific
26783 configuration file, rather than the old Privoxy.
26784 - OS X Vidalia Bundle: Vidalia, Tor, and Polipo are compiled as
26785 x86-only for better compatibility with OS X 10.6, aka Snow Leopard.
26786 - OS X Tor Expert Bundle: Tor is compiled as x86-only for
26787 better compatibility with OS X 10.6, aka Snow Leopard.
26788 - OS X Vidalia Bundle: The multi-package installer is now replaced
26789 by a simple drag and drop to the /Applications folder. This change
26790 occurred with the upgrade to Vidalia 0.2.3.
26793 Changes in version 0.2.1.19 - 2009-07-28
26794 Tor 0.2.1.19 fixes a major bug with accessing and providing hidden
26795 services on Tor 0.2.1.3-alpha through 0.2.1.18.
26798 - Make accessing hidden services on 0.2.1.x work right again.
26799 Bugfix on 0.2.1.3-alpha; workaround for bug 1038. Diagnosis and
26800 part of patch provided by "optimist".
26803 - When a relay/bridge is writing out its identity key fingerprint to
26804 the "fingerprint" file and to its logs, write it without spaces. Now
26805 it will look like the fingerprints in our bridges documentation,
26806 and confuse fewer users.
26809 - Relays no longer publish a new server descriptor if they change
26810 their MaxAdvertisedBandwidth config option but it doesn't end up
26811 changing their advertised bandwidth numbers. Bugfix on 0.2.0.28-rc;
26812 fixes bug 1026. Patch from Sebastian.
26813 - Avoid leaking memory every time we get a create cell but we have
26814 so many already queued that we refuse it. Bugfix on 0.2.0.19-alpha;
26815 fixes bug 1034. Reported by BarkerJr.
26818 Changes in version 0.2.1.18 - 2009-07-24
26819 Tor 0.2.1.18 lays the foundations for performance improvements,
26820 adds status events to help users diagnose bootstrap problems, adds
26821 optional authentication/authorization for hidden services, fixes a
26822 variety of potential anonymity problems, and includes a huge pile of
26823 other features and bug fixes.
26826 - Add LIBS=-lrt to Makefile.am so the Tor RPMs use a static libevent.
26829 Changes in version 0.2.1.17-rc - 2009-07-07
26830 Tor 0.2.1.17-rc marks the fourth -- and hopefully last -- release
26831 candidate for the 0.2.1.x series. It lays the groundwork for further
26832 client performance improvements, and also fixes a big bug with directory
26833 authorities that were causing them to assign Guard and Stable flags
26836 The Windows bundles also finally include the geoip database that we
26837 thought we'd been shipping since 0.2.0.x (oops), and the OS X bundles
26838 should actually install Torbutton rather than giving you a cryptic
26839 failure message (oops).
26842 - Clients now use the bandwidth values in the consensus, rather than
26843 the bandwidth values in each relay descriptor. This approach opens
26844 the door to more accurate bandwidth estimates once the directory
26845 authorities start doing active measurements. Implements more of
26849 - When Tor clients restart after 1-5 days, they discard all their
26850 cached descriptors as too old, but they still use the cached
26851 consensus document. This approach is good for robustness, but
26852 bad for performance: since they don't know any bandwidths, they
26853 end up choosing at random rather than weighting their choice by
26854 speed. Fixed by the above feature of putting bandwidths in the
26855 consensus. Bugfix on 0.2.0.x.
26856 - Directory authorities were neglecting to mark relays down in their
26857 internal histories if the relays fall off the routerlist without
26858 ever being found unreachable. So there were relays in the histories
26859 that haven't been seen for eight months, and are listed as being
26860 up for eight months. This wreaked havoc on the "median wfu"
26861 and "median mtbf" calculations, in turn making Guard and Stable
26862 flags very wrong, hurting network performance. Fixes bugs 696 and
26863 969. Bugfix on 0.2.0.6-alpha.
26866 - Serve the DirPortFrontPage page even when we have been approaching
26867 our quotas recently. Fixes bug 1013; bugfix on 0.2.1.8-alpha.
26868 - The control port would close the connection before flushing long
26869 replies, such as the network consensus, if a QUIT command was issued
26870 before the reply had completed. Now, the control port flushes all
26871 pending replies before closing the connection. Also fixed a spurious
26872 warning when a QUIT command is issued after a malformed or rejected
26873 AUTHENTICATE command, but before the connection was closed. Patch
26874 by Marcus Griep. Bugfix on 0.2.0.x; fixes bugs 1015 and 1016.
26875 - When we can't find an intro key for a v2 hidden service descriptor,
26876 fall back to the v0 hidden service descriptor and log a bug message.
26877 Workaround for bug 1024.
26878 - Fix a log message that did not respect the SafeLogging option.
26882 - If we're a relay and we change our IP address, be more verbose
26883 about the reason that made us change. Should help track down
26884 further bugs for relays on dynamic IP addresses.
26887 Changes in version 0.2.0.35 - 2009-06-24
26889 - Avoid crashing in the presence of certain malformed descriptors.
26890 Found by lark, and by automated fuzzing.
26891 - Fix an edge case where a malicious exit relay could convince a
26892 controller that the client's DNS question resolves to an internal IP
26893 address. Bug found and fixed by "optimist"; bugfix on 0.1.2.8-beta.
26896 - Finally fix the bug where dynamic-IP relays disappear when their
26897 IP address changes: directory mirrors were mistakenly telling
26898 them their old address if they asked via begin_dir, so they
26899 never got an accurate answer about their new address, so they
26900 just vanished after a day. For belt-and-suspenders, relays that
26901 don't set Address in their config now avoid using begin_dir for
26902 all direct connections. Should fix bugs 827, 883, and 900.
26903 - Fix a timing-dependent, allocator-dependent, DNS-related crash bug
26904 that would occur on some exit nodes when DNS failures and timeouts
26905 occurred in certain patterns. Fix for bug 957.
26908 - When starting with a cache over a few days old, do not leak
26909 memory for the obsolete router descriptors in it. Bugfix on
26910 0.2.0.33; fixes bug 672.
26911 - Hidden service clients didn't use a cached service descriptor that
26912 was older than 15 minutes, but wouldn't fetch a new one either,
26913 because there was already one in the cache. Now, fetch a v2
26914 descriptor unless the same descriptor was added to the cache within
26915 the last 15 minutes. Fixes bug 997; reported by Marcus Griep.
26918 Changes in version 0.2.1.16-rc - 2009-06-20
26919 Tor 0.2.1.16-rc speeds up performance for fast exit relays, and fixes
26920 a bunch of minor bugs.
26923 - Fix an edge case where a malicious exit relay could convince a
26924 controller that the client's DNS question resolves to an internal IP
26925 address. Bug found and fixed by "optimist"; bugfix on 0.1.2.8-beta.
26927 o Major performance improvements (on 0.2.0.x):
26928 - Disable and refactor some debugging checks that forced a linear scan
26929 over the whole server-side DNS cache. These accounted for over 50%
26930 of CPU time on a relatively busy exit node's gprof profile. Found
26932 - Disable some debugging checks that appeared in exit node profile
26936 - Update to the "June 3 2009" ip-to-country file.
26937 - Do not have tor-resolve automatically refuse all .onion addresses;
26938 if AutomapHostsOnResolve is set in your torrc, this will work fine.
26940 o Minor bugfixes (on 0.2.0.x):
26941 - Log correct error messages for DNS-related network errors on
26943 - Fix a race condition that could cause crashes or memory corruption
26944 when running as a server with a controller listening for log
26946 - Avoid crashing when we have a policy specified in a DirPolicy or
26947 SocksPolicy or ReachableAddresses option with ports set on it,
26948 and we re-load the policy. May fix bug 996.
26949 - Hidden service clients didn't use a cached service descriptor that
26950 was older than 15 minutes, but wouldn't fetch a new one either,
26951 because there was already one in the cache. Now, fetch a v2
26952 descriptor unless the same descriptor was added to the cache within
26953 the last 15 minutes. Fixes bug 997; reported by Marcus Griep.
26955 o Minor bugfixes (on 0.2.1.x):
26956 - Don't warn users about low port and hibernation mix when they
26957 provide a *ListenAddress directive to fix that. Bugfix on
26959 - When switching back and forth between bridge mode, do not start
26960 gathering GeoIP data until two hours have passed.
26961 - Do not complain that the user has requested an excluded node as
26962 an exit when the node is not really an exit. This could happen
26963 because the circuit was for testing, or an introduction point.
26967 Changes in version 0.2.1.15-rc - 2009-05-25
26968 Tor 0.2.1.15-rc marks the second release candidate for the 0.2.1.x
26969 series. It fixes a major bug on fast exit relays, as well as a variety
26970 of more minor bugs.
26972 o Major bugfixes (on 0.2.0.x):
26973 - Fix a timing-dependent, allocator-dependent, DNS-related crash bug
26974 that would occur on some exit nodes when DNS failures and timeouts
26975 occurred in certain patterns. Fix for bug 957.
26977 o Minor bugfixes (on 0.2.0.x):
26978 - Actually return -1 in the error case for read_bandwidth_usage().
26979 Harmless bug, since we currently don't care about the return value
26980 anywhere. Bugfix on 0.2.0.9-alpha.
26981 - Provide a more useful log message if bug 977 (related to buffer
26982 freelists) ever reappears, and do not crash right away.
26983 - Fix an assertion failure on 64-bit platforms when we allocated
26984 memory right up to the end of a memarea, then realigned the memory
26985 one step beyond the end. Fixes a possible cause of bug 930.
26986 - Protect the count of open sockets with a mutex, so we can't
26987 corrupt it when two threads are closing or opening sockets at once.
26988 Fix for bug 939. Bugfix on 0.2.0.1-alpha.
26989 - Don't allow a bridge to publish its router descriptor to a
26990 non-bridge directory authority. Fixes part of bug 932.
26991 - When we change to or from being a bridge, reset our counts of
26992 client usage by country. Fixes bug 932.
26993 - Fix a bug that made stream bandwidth get misreported to the
26995 - Stop using malloc_usable_size() to use more area than we had
26996 actually allocated: it was safe, but made valgrind really unhappy.
26997 - Fix a memory leak when v3 directory authorities load their keys
26998 and cert from disk. Bugfix on 0.2.0.1-alpha.
27000 o Minor bugfixes (on 0.2.1.x):
27001 - Fix use of freed memory when deciding to mark a non-addable
27002 descriptor as never-downloadable. Bugfix on 0.2.1.9-alpha.
27005 Changes in version 0.2.1.14-rc - 2009-04-12
27006 Tor 0.2.1.14-rc marks the first release candidate for the 0.2.1.x
27007 series. It begins fixing some major performance problems, and also
27008 finally addresses the bug that was causing relays on dynamic IP
27009 addresses to fall out of the directory.
27012 - Clients replace entry guards that were chosen more than a few months
27013 ago. This change should significantly improve client performance,
27014 especially once more people upgrade, since relays that have been
27015 a guard for a long time are currently overloaded.
27017 o Major bugfixes (on 0.2.0):
27018 - Finally fix the bug where dynamic-IP relays disappear when their
27019 IP address changes: directory mirrors were mistakenly telling
27020 them their old address if they asked via begin_dir, so they
27021 never got an accurate answer about their new address, so they
27022 just vanished after a day. For belt-and-suspenders, relays that
27023 don't set Address in their config now avoid using begin_dir for
27024 all direct connections. Should fix bugs 827, 883, and 900.
27025 - Relays were falling out of the networkstatus consensus for
27026 part of a day if they changed their local config but the
27027 authorities discarded their new descriptor as "not sufficiently
27028 different". Now directory authorities accept a descriptor as changed
27029 if bandwidthrate or bandwidthburst changed. Partial fix for bug 962;
27030 patch by Sebastian.
27031 - Avoid crashing in the presence of certain malformed descriptors.
27032 Found by lark, and by automated fuzzing.
27035 - When generating circuit events with verbose nicknames for
27036 controllers, try harder to look up nicknames for routers on a
27037 circuit. (Previously, we would look in the router descriptors we had
27038 for nicknames, but not in the consensus.) Partial fix for bug 941.
27039 - If the bridge config line doesn't specify a port, assume 443.
27040 This makes bridge lines a bit smaller and easier for users to
27042 - Raise the minimum bandwidth to be a relay from 20000 bytes to 20480
27043 bytes (aka 20KB/s), to match our documentation. Also update
27044 directory authorities so they always assign the Fast flag to relays
27045 with 20KB/s of capacity. Now people running relays won't suddenly
27046 find themselves not seeing any use, if the network gets faster
27048 - Update to the "April 3 2009" ip-to-country file.
27051 - Avoid trying to print raw memory to the logs when we decide to
27052 give up on downloading a given relay descriptor. Bugfix on
27054 - In tor-resolve, when the Tor client to use is specified by
27055 <hostname>:<port>, actually use the specified port rather than
27056 defaulting to 9050. Bugfix on 0.2.1.6-alpha.
27057 - Make directory usage recording work again. Bugfix on 0.2.1.6-alpha.
27058 - When starting with a cache over a few days old, do not leak
27059 memory for the obsolete router descriptors in it. Bugfix on
27061 - Avoid double-free on list of successfully uploaded hidden
27062 service discriptors. Fix for bug 948. Bugfix on 0.2.1.6-alpha.
27063 - Change memarea_strndup() implementation to work even when
27064 duplicating a string at the end of a page. This bug was
27065 harmless for now, but could have meant crashes later. Fix by
27066 lark. Bugfix on 0.2.1.1-alpha.
27067 - Limit uploaded directory documents to be 16M rather than 500K.
27068 The directory authorities were refusing v3 consensus votes from
27069 other authorities, since the votes are now 504K. Fixes bug 959;
27070 bugfix on 0.0.2pre17 (where we raised it from 50K to 500K ;).
27071 - Directory authorities should never send a 503 "busy" response to
27072 requests for votes or keys. Bugfix on 0.2.0.8-alpha; exposed by
27076 Changes in version 0.2.1.13-alpha - 2009-03-09
27077 Tor 0.2.1.13-alpha includes another big pile of minor bugfixes and
27078 cleanups. We're finally getting close to a release candidate.
27081 - Correctly update the list of which countries we exclude as
27082 exits, when the GeoIP file is loaded or reloaded. Diagnosed by
27083 lark. Bugfix on 0.2.1.6-alpha.
27085 o Minor bugfixes (on 0.2.0.x and earlier):
27086 - Automatically detect MacOSX versions earlier than 10.4.0, and
27087 disable kqueue from inside Tor when running with these versions.
27088 We previously did this from the startup script, but that was no
27089 help to people who didn't use the startup script. Resolves bug 863.
27090 - When we had picked an exit node for a connection, but marked it as
27091 "optional", and it turned out we had no onion key for the exit,
27092 stop wanting that exit and try again. This situation may not
27093 be possible now, but will probably become feasible with proposal
27094 158. Spotted by rovv. Fixes another case of bug 752.
27095 - Clients no longer cache certificates for authorities they do not
27096 recognize. Bugfix on 0.2.0.9-alpha.
27097 - When we can't transmit a DNS request due to a network error, retry
27098 it after a while, and eventually transmit a failing response to
27099 the RESOLVED cell. Bugfix on 0.1.2.5-alpha.
27100 - If the controller claimed responsibility for a stream, but that
27101 stream never finished making its connection, it would live
27102 forever in circuit_wait state. Now we close it after SocksTimeout
27103 seconds. Bugfix on 0.1.2.7-alpha; reported by Mike Perry.
27104 - Drop begin cells to a hidden service if they come from the middle
27105 of a circuit. Patch from lark.
27106 - When we erroneously receive two EXTEND cells for the same circuit
27107 ID on the same connection, drop the second. Patch from lark.
27108 - Fix a crash that occurs on exit nodes when a nameserver request
27109 timed out. Bugfix on 0.1.2.1-alpha; our CLEAR debugging code had
27110 been suppressing the bug since 0.1.2.10-alpha. Partial fix for
27112 - Do not assume that a stack-allocated character array will be
27113 64-bit aligned on platforms that demand that uint64_t access is
27114 aligned. Possible fix for bug 604.
27115 - Parse dates and IPv4 addresses in a locale- and libc-independent
27116 manner, to avoid platform-dependent behavior on malformed input.
27117 - Build correctly when configured to build outside the main source
27118 path. Patch from Michael Gold.
27119 - We were already rejecting relay begin cells with destination port
27120 of 0. Now also reject extend cells with destination port or address
27121 of 0. Suggested by lark.
27123 o Minor bugfixes (on 0.2.1.x):
27124 - Don't re-extend introduction circuits if we ran out of RELAY_EARLY
27125 cells. Bugfix on 0.2.1.3-alpha. Fixes more of bug 878.
27126 - If we're an exit node, scrub the IP address to which we are exiting
27127 in the logs. Bugfix on 0.2.1.8-alpha.
27130 - On Linux, use the prctl call to re-enable core dumps when the user
27132 - New controller event NEWCONSENSUS that lists the networkstatus
27133 lines for every recommended relay. Now controllers like Torflow
27134 can keep up-to-date on which relays they should be using.
27135 - Update to the "February 26 2009" ip-to-country file.
27138 Changes in version 0.2.0.34 - 2009-02-08
27139 Tor 0.2.0.34 features several more security-related fixes. You should
27140 upgrade, especially if you run an exit relay (remote crash) or a
27141 directory authority (remote infinite loop), or you're on an older
27142 (pre-XP) or not-recently-patched Windows (remote exploit).
27144 This release marks end-of-life for Tor 0.1.2.x. Those Tor versions
27145 have many known flaws, and nobody should be using them. You should
27146 upgrade. If you're using a Linux or BSD and its packages are obsolete,
27147 stop using those packages and upgrade anyway.
27150 - Fix an infinite-loop bug on handling corrupt votes under certain
27151 circumstances. Bugfix on 0.2.0.8-alpha.
27152 - Fix a temporary DoS vulnerability that could be performed by
27153 a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark.
27154 - Avoid a potential crash on exit nodes when processing malformed
27155 input. Remote DoS opportunity. Bugfix on 0.2.0.33.
27156 - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid.
27157 Spec conformance issue. Bugfix on Tor 0.0.2pre27.
27160 - Fix compilation on systems where time_t is a 64-bit integer.
27161 Patch from Matthias Drochner.
27162 - Don't consider expiring already-closed client connections. Fixes
27163 bug 893. Bugfix on 0.0.2pre20.
27166 Changes in version 0.2.1.12-alpha - 2009-02-08
27167 Tor 0.2.1.12-alpha features several more security-related fixes. You
27168 should upgrade, especially if you run an exit relay (remote crash) or
27169 a directory authority (remote infinite loop), or you're on an older
27170 (pre-XP) or not-recently-patched Windows (remote exploit). It also
27171 includes a big pile of minor bugfixes and cleanups.
27174 - Fix an infinite-loop bug on handling corrupt votes under certain
27175 circumstances. Bugfix on 0.2.0.8-alpha.
27176 - Fix a temporary DoS vulnerability that could be performed by
27177 a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark.
27178 - Avoid a potential crash on exit nodes when processing malformed
27179 input. Remote DoS opportunity. Bugfix on 0.2.1.7-alpha.
27182 - Let controllers actually ask for the "clients_seen" event for
27183 getting usage summaries on bridge relays. Bugfix on 0.2.1.10-alpha;
27184 reported by Matt Edman.
27185 - Fix a compile warning on OSX Panther. Fixes bug 913; bugfix against
27187 - Fix a bug in address parsing that was preventing bridges or hidden
27188 service targets from being at IPv6 addresses.
27189 - Solve a bug that kept hardware crypto acceleration from getting
27190 enabled when accounting was turned on. Fixes bug 907. Bugfix on
27192 - Remove a bash-ism from configure.in to build properly on non-Linux
27193 platforms. Bugfix on 0.2.1.1-alpha.
27194 - Fix code so authorities _actually_ send back X-Descriptor-Not-New
27195 headers. Bugfix on 0.2.0.10-alpha.
27196 - Don't consider expiring already-closed client connections. Fixes
27197 bug 893. Bugfix on 0.0.2pre20.
27198 - Fix another interesting corner-case of bug 891 spotted by rovv:
27199 Previously, if two hosts had different amounts of clock drift, and
27200 one of them created a new connection with just the wrong timing,
27201 the other might decide to deprecate the new connection erroneously.
27202 Bugfix on 0.1.1.13-alpha.
27203 - Resolve a very rare crash bug that could occur when the user forced
27204 a nameserver reconfiguration during the middle of a nameserver
27205 probe. Fixes bug 526. Bugfix on 0.1.2.1-alpha.
27206 - Support changing value of ServerDNSRandomizeCase during SIGHUP.
27207 Bugfix on 0.2.1.7-alpha.
27208 - If we're using bridges and our network goes away, be more willing
27209 to forgive our bridges and try again when we get an application
27210 request. Bugfix on 0.2.0.x.
27213 - Support platforms where time_t is 64 bits long. (Congratulations,
27214 NetBSD!) Patch from Matthias Drochner.
27215 - Add a 'getinfo status/clients-seen' controller command, in case
27216 controllers want to hear clients_seen events but connect late.
27219 - Disable GCC's strict alias optimization by default, to avoid the
27220 likelihood of its introducing subtle bugs whenever our code violates
27221 the letter of C99's alias rules.
27224 Changes in version 0.2.0.33 - 2009-01-21
27225 Tor 0.2.0.33 fixes a variety of bugs that were making relays less
27226 useful to users. It also finally fixes a bug where a relay or client
27227 that's been off for many days would take a long time to bootstrap.
27229 This update also fixes an important security-related bug reported by
27230 Ilja van Sprundel. You should upgrade. (We'll send out more details
27231 about the bug once people have had some time to upgrade.)
27234 - Fix a heap-corruption bug that may be remotely triggerable on
27235 some platforms. Reported by Ilja van Sprundel.
27238 - When a stream at an exit relay is in state "resolving" or
27239 "connecting" and it receives an "end" relay cell, the exit relay
27240 would silently ignore the end cell and not close the stream. If
27241 the client never closes the circuit, then the exit relay never
27242 closes the TCP connection. Bug introduced in Tor 0.1.2.1-alpha;
27243 reported by "wood".
27244 - When sending CREATED cells back for a given circuit, use a 64-bit
27245 connection ID to find the right connection, rather than an addr:port
27246 combination. Now that we can have multiple OR connections between
27247 the same ORs, it is no longer possible to use addr:port to uniquely
27248 identify a connection.
27249 - Bridge relays that had DirPort set to 0 would stop fetching
27250 descriptors shortly after startup, and then briefly resume
27251 after a new bandwidth test and/or after publishing a new bridge
27252 descriptor. Bridge users that try to bootstrap from them would
27253 get a recent networkstatus but would get descriptors from up to
27254 18 hours earlier, meaning most of the descriptors were obsolete
27255 already. Reported by Tas; bugfix on 0.2.0.13-alpha.
27256 - Prevent bridge relays from serving their 'extrainfo' document
27257 to anybody who asks, now that extrainfo docs include potentially
27258 sensitive aggregated client geoip summaries. Bugfix on
27260 - If the cached networkstatus consensus is more than five days old,
27261 discard it rather than trying to use it. In theory it could be
27262 useful because it lists alternate directory mirrors, but in practice
27263 it just means we spend many minutes trying directory mirrors that
27264 are long gone from the network. Also discard router descriptors as
27265 we load them if they are more than five days old, since the onion
27266 key is probably wrong by now. Bugfix on 0.2.0.x. Fixes bug 887.
27269 - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
27270 could make gcc generate non-functional binary search code. Bugfix
27272 - Build correctly on platforms without socklen_t.
27273 - Compile without warnings on solaris.
27274 - Avoid potential crash on internal error during signature collection.
27275 Fixes bug 864. Patch from rovv.
27276 - Correct handling of possible malformed authority signing key
27277 certificates with internal signature types. Fixes bug 880.
27278 Bugfix on 0.2.0.3-alpha.
27279 - Fix a hard-to-trigger resource leak when logging credential status.
27281 - When we can't initialize DNS because the network is down, do not
27282 automatically stop Tor from starting. Instead, we retry failed
27283 dns_init() every 10 minutes, and change the exit policy to reject
27284 *:* until one succeeds. Fixes bug 691.
27285 - Use 64 bits instead of 32 bits for connection identifiers used with
27286 the controller protocol, to greatly reduce risk of identifier reuse.
27287 - When we're choosing an exit node for a circuit, and we have
27288 no pending streams, choose a good general exit rather than one that
27289 supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
27290 - Fix another case of assuming, when a specific exit is requested,
27291 that we know more than the user about what hosts it allows.
27292 Fixes one case of bug 752. Patch from rovv.
27293 - Clip the MaxCircuitDirtiness config option to a minimum of 10
27294 seconds. Warn the user if lower values are given in the
27295 configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
27296 - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
27297 user if lower values are given in the configuration. Bugfix on
27298 0.1.1.17-rc. Patch by Sebastian.
27299 - Fix a memory leak when we decline to add a v2 rendezvous descriptor to
27300 the cache because we already had a v0 descriptor with the same ID.
27301 Bugfix on 0.2.0.18-alpha.
27302 - Fix a race condition when freeing keys shared between main thread
27303 and CPU workers that could result in a memory leak. Bugfix on
27304 0.1.0.1-rc. Fixes bug 889.
27305 - Send a valid END cell back when a client tries to connect to a
27306 nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
27307 840. Patch from rovv.
27308 - Check which hops rendezvous stream cells are associated with to
27309 prevent possible guess-the-streamid injection attacks from
27310 intermediate hops. Fixes another case of bug 446. Based on patch
27312 - If a broken client asks a non-exit router to connect somewhere,
27313 do not even do the DNS lookup before rejecting the connection.
27314 Fixes another case of bug 619. Patch from rovv.
27315 - When a relay gets a create cell it can't decrypt (e.g. because it's
27316 using the wrong onion key), we were dropping it and letting the
27317 client time out. Now actually answer with a destroy cell. Fixes
27318 bug 904. Bugfix on 0.0.2pre8.
27320 o Minor bugfixes (hidden services):
27321 - Do not throw away existing introduction points on SIGHUP. Bugfix on
27322 0.0.6pre1. Patch by Karsten. Fixes bug 874.
27325 - Report the case where all signatures in a detached set are rejected
27326 differently than the case where there is an error handling the
27328 - When we realize that another process has modified our cached
27329 descriptors, print out a more useful error message rather than
27330 triggering an assertion. Fixes bug 885. Patch from Karsten.
27331 - Implement the 0x20 hack to better resist DNS poisoning: set the
27332 case on outgoing DNS requests randomly, and reject responses that do
27333 not match the case correctly. This logic can be disabled with the
27334 ServerDNSRamdomizeCase setting, if you are using one of the 0.3%
27335 of servers that do not reliably preserve case in replies. See
27336 "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
27338 - Check DNS replies for more matching fields to better resist DNS
27340 - Never use OpenSSL compression: it wastes RAM and CPU trying to
27341 compress cells, which are basically all encrypted, compressed, or
27345 Changes in version 0.2.1.11-alpha - 2009-01-20
27346 Tor 0.2.1.11-alpha finishes fixing the "if your Tor is off for a
27347 week it will take a long time to bootstrap again" bug. It also fixes
27348 an important security-related bug reported by Ilja van Sprundel. You
27349 should upgrade. (We'll send out more details about the bug once people
27350 have had some time to upgrade.)
27353 - Fix a heap-corruption bug that may be remotely triggerable on
27354 some platforms. Reported by Ilja van Sprundel.
27357 - Discard router descriptors as we load them if they are more than
27358 five days old. Otherwise if Tor is off for a long time and then
27359 starts with cached descriptors, it will try to use the onion
27360 keys in those obsolete descriptors when building circuits. Bugfix
27361 on 0.2.0.x. Fixes bug 887.
27364 - Try to make sure that the version of Libevent we're running with
27365 is binary-compatible with the one we built with. May address bug
27367 - Make setting ServerDNSRandomizeCase to 0 actually work. Bugfix
27368 for bug 905. Bugfix on 0.2.1.7-alpha.
27369 - Add a new --enable-local-appdata configuration switch to change
27370 the default location of the datadir on win32 from APPDATA to
27371 LOCAL_APPDATA. In the future, we should migrate to LOCAL_APPDATA
27372 entirely. Patch from coderman.
27375 - Make outbound DNS packets respect the OutboundBindAddress setting.
27376 Fixes the bug part of bug 798. Bugfix on 0.1.2.2-alpha.
27377 - When our circuit fails at the first hop (e.g. we get a destroy
27378 cell back), avoid using that OR connection anymore, and also
27379 tell all the one-hop directory requests waiting for it that they
27380 should fail. Bugfix on 0.2.1.3-alpha.
27381 - In the torify(1) manpage, mention that tsocks will leak your
27385 Changes in version 0.2.1.10-alpha - 2009-01-06
27386 Tor 0.2.1.10-alpha fixes two major bugs in bridge relays (one that
27387 would make the bridge relay not so useful if it had DirPort set to 0,
27388 and one that could let an attacker learn a little bit of information
27389 about the bridge's users), and a bug that would cause your Tor relay
27390 to ignore a circuit create request it can't decrypt (rather than reply
27391 with an error). It also fixes a wide variety of other bugs.
27394 - If the cached networkstatus consensus is more than five days old,
27395 discard it rather than trying to use it. In theory it could
27396 be useful because it lists alternate directory mirrors, but in
27397 practice it just means we spend many minutes trying directory
27398 mirrors that are long gone from the network. Helps bug 887 a bit;
27400 - Bridge relays that had DirPort set to 0 would stop fetching
27401 descriptors shortly after startup, and then briefly resume
27402 after a new bandwidth test and/or after publishing a new bridge
27403 descriptor. Bridge users that try to bootstrap from them would
27404 get a recent networkstatus but would get descriptors from up to
27405 18 hours earlier, meaning most of the descriptors were obsolete
27406 already. Reported by Tas; bugfix on 0.2.0.13-alpha.
27407 - Prevent bridge relays from serving their 'extrainfo' document
27408 to anybody who asks, now that extrainfo docs include potentially
27409 sensitive aggregated client geoip summaries. Bugfix on
27413 - New controller event "clients_seen" to report a geoip-based summary
27414 of which countries we've seen clients from recently. Now controllers
27415 like Vidalia can show bridge operators that they're actually making
27417 - Build correctly against versions of OpenSSL 0.9.8 or later built
27418 without support for deprecated functions.
27419 - Update to the "December 19 2008" ip-to-country file.
27421 o Minor bugfixes (on 0.2.0.x):
27422 - Authorities now vote for the Stable flag for any router whose
27423 weighted MTBF is at least 5 days, regardless of the mean MTBF.
27424 - Do not remove routers as too old if we do not have any consensus
27425 document. Bugfix on 0.2.0.7-alpha.
27426 - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid.
27427 Spec conformance issue. Bugfix on Tor 0.0.2pre27.
27428 - When an exit relay resolves a stream address to a local IP address,
27429 do not just keep retrying that same exit relay over and
27430 over. Instead, just close the stream. Addresses bug 872. Bugfix
27431 on 0.2.0.32. Patch from rovv.
27432 - If a hidden service sends us an END cell, do not consider
27433 retrying the connection; just close it. Patch from rovv.
27434 - When we made bridge authorities stop serving bridge descriptors over
27435 unencrypted links, we also broke DirPort reachability testing for
27436 bridges. So bridges with a non-zero DirPort were printing spurious
27437 warns to their logs. Bugfix on 0.2.0.16-alpha. Fixes bug 709.
27438 - When a relay gets a create cell it can't decrypt (e.g. because it's
27439 using the wrong onion key), we were dropping it and letting the
27440 client time out. Now actually answer with a destroy cell. Fixes
27441 bug 904. Bugfix on 0.0.2pre8.
27442 - Squeeze 2-5% out of client performance (according to oprofile) by
27443 improving the implementation of some policy-manipulation functions.
27445 o Minor bugfixes (on 0.2.1.x):
27446 - Make get_interface_address() function work properly again; stop
27447 guessing the wrong parts of our address as our address.
27448 - Do not cannibalize a circuit if we're out of RELAY_EARLY cells to
27449 send on that circuit. Otherwise we might violate the proposal-110
27450 limit. Bugfix on 0.2.1.3-alpha. Partial fix for bug 878. Diagnosis
27452 - When we're sending non-EXTEND cells to the first hop in a circuit,
27453 for example to use an encrypted directory connection, we don't need
27454 to use RELAY_EARLY cells: the first hop knows what kind of cell
27455 it is, and nobody else can even see the cell type. Conserving
27456 RELAY_EARLY cells makes it easier to cannibalize circuits like
27458 - Stop logging nameserver addresses in reverse order.
27459 - If we are retrying a directory download slowly over and over, do
27460 not automatically give up after the 254th failure. Bugfix on
27462 - Resume reporting accurate "stream end" reasons to the local control
27463 port. They were lost in the changes for Proposal 148. Bugfix on
27466 o Deprecated and removed features:
27467 - The old "tor --version --version" command, which would print out
27468 the subversion "Id" of most of the source files, is now removed. It
27469 turned out to be less useful than we'd expected, and harder to
27472 o Code simplifications and refactoring:
27473 - Change our header file guard macros to be less likely to conflict
27474 with system headers. Adam Langley noticed that we were conflicting
27475 with log.h on Android.
27476 - Tool-assisted documentation cleanup. Nearly every function or
27477 static variable in Tor should have its own documentation now.
27480 Changes in version 0.2.1.9-alpha - 2008-12-25
27481 Tor 0.2.1.9-alpha fixes many more bugs, some of them security-related.
27483 o New directory authorities:
27484 - gabelmoo (the authority run by Karsten Loesing) now has a new
27488 - Never use a connection with a mismatched address to extend a
27489 circuit, unless that connection is canonical. A canonical
27490 connection is one whose address is authenticated by the router's
27491 identity key, either in a NETINFO cell or in a router descriptor.
27492 - Avoid a possible memory corruption bug when receiving hidden service
27493 descriptors. Bugfix on 0.2.1.6-alpha.
27496 - Fix a logic error that would automatically reject all but the first
27497 configured DNS server. Bugfix on 0.2.1.5-alpha. Possible fix for
27498 part of bug 813/868. Bug spotted by coderman.
27499 - When a stream at an exit relay is in state "resolving" or
27500 "connecting" and it receives an "end" relay cell, the exit relay
27501 would silently ignore the end cell and not close the stream. If
27502 the client never closes the circuit, then the exit relay never
27503 closes the TCP connection. Bug introduced in 0.1.2.1-alpha;
27504 reported by "wood".
27505 - When we can't initialize DNS because the network is down, do not
27506 automatically stop Tor from starting. Instead, retry failed
27507 dns_init() every 10 minutes, and change the exit policy to reject
27508 *:* until one succeeds. Fixes bug 691.
27511 - Give a better error message when an overzealous init script says
27512 "sudo -u username tor --user username". Makes Bug 882 easier for
27514 - When a directory authority gives us a new guess for our IP address,
27515 log which authority we used. Hopefully this will help us debug
27516 the recent complaints about bad IP address guesses.
27517 - Detect svn revision properly when we're using git-svn.
27518 - Try not to open more than one descriptor-downloading connection
27519 to an authority at once. This should reduce load on directory
27520 authorities. Fixes bug 366.
27521 - Add cross-certification to newly generated certificates, so that
27522 a signing key is enough information to look up a certificate.
27523 Partial implementation of proposal 157.
27524 - Start serving certificates by <identity digest, signing key digest>
27525 pairs. Partial implementation of proposal 157.
27526 - Clients now never report any stream end reason except 'MISC'.
27527 Implements proposal 148.
27528 - On platforms with a maximum syslog string length, truncate syslog
27529 messages to that length ourselves, rather than relying on the
27530 system to do it for us.
27531 - Optimize out calls to time(NULL) that occur for every IO operation,
27532 or for every cell. On systems where time() is a slow syscall,
27533 this fix will be slightly helpful.
27534 - Exit servers can now answer resolve requests for ip6.arpa addresses.
27535 - When we download a descriptor that we then immediately (as
27536 a directory authority) reject, do not retry downloading it right
27537 away. Should save some bandwidth on authorities. Fix for bug
27538 888. Patch by Sebastian Hahn.
27539 - When a download gets us zero good descriptors, do not notify
27540 Tor that new directory information has arrived.
27541 - Avoid some nasty corner cases in the logic for marking connections
27542 as too old or obsolete or noncanonical for circuits. Partial
27545 o Minor features (controller):
27546 - New CONSENSUS_ARRIVED event to note when a new consensus has
27547 been fetched and validated.
27548 - When we realize that another process has modified our cached
27549 descriptors file, print out a more useful error message rather
27550 than triggering an assertion. Fixes bug 885. Patch from Karsten.
27551 - Add an internal-use-only __ReloadTorrcOnSIGHUP option for
27552 controllers to prevent SIGHUP from reloading the
27553 configuration. Fixes bug 856.
27556 - Resume using the correct "REASON=" stream when telling the
27557 controller why we closed a stream. Bugfix in 0.2.1.1-alpha.
27558 - When a canonical connection appears later in our internal list
27559 than a noncanonical one for a given OR ID, always use the
27560 canonical one. Bugfix on 0.2.0.12-alpha. Fixes bug 805.
27562 - Clip the MaxCircuitDirtiness config option to a minimum of 10
27563 seconds. Warn the user if lower values are given in the
27564 configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
27565 - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
27566 user if lower values are given in the configuration. Bugfix on
27567 0.1.1.17-rc. Patch by Sebastian.
27568 - Fix a race condition when freeing keys shared between main thread
27569 and CPU workers that could result in a memory leak. Bugfix on
27570 0.1.0.1-rc. Fixes bug 889.
27572 o Minor bugfixes (hidden services):
27573 - Do not throw away existing introduction points on SIGHUP (bugfix on
27574 0.0.6pre1); also, do not stall hidden services because we're
27575 throwing away introduction points; bugfix on 0.2.1.7-alpha. Spotted
27576 by John Brooks. Patch by Karsten. Fixes bug 874.
27577 - Fix a memory leak when we decline to add a v2 rendezvous
27578 descriptor to the cache because we already had a v0 descriptor
27579 with the same ID. Bugfix on 0.2.0.18-alpha.
27581 o Deprecated and removed features:
27582 - RedirectExits has been removed. It was deprecated since
27584 - Finally remove deprecated "EXTENDED_FORMAT" controller feature. It
27585 has been called EXTENDED_EVENTS since 0.1.2.4-alpha.
27586 - Cell pools are now always enabled; --disable-cell-pools is ignored.
27588 o Code simplifications and refactoring:
27589 - Rename the confusing or_is_obsolete field to the more appropriate
27590 is_bad_for_new_circs, and move it to or_connection_t where it
27592 - Move edge-only flags from connection_t to edge_connection_t: not
27593 only is this better coding, but on machines of plausible alignment,
27594 it should save 4-8 bytes per connection_t. "Every little bit helps."
27595 - Rename ServerDNSAllowBrokenResolvConf to ServerDNSAllowBrokenConfig
27596 for consistency; keep old option working for backward compatibility.
27597 - Simplify the code for finding connections to use for a circuit.
27600 Changes in version 0.2.1.8-alpha - 2008-12-08
27601 Tor 0.2.1.8-alpha fixes some crash bugs in earlier alpha releases,
27602 builds better on unusual platforms like Solaris and old OS X, and
27603 fixes a variety of other issues.
27606 - New DirPortFrontPage option that takes an html file and publishes
27607 it as "/" on the DirPort. Now relay operators can provide a
27608 disclaimer without needing to set up a separate webserver. There's
27609 a sample disclaimer in contrib/tor-exit-notice.html.
27612 - When the client is choosing entry guards, now it selects at most
27613 one guard from a given relay family. Otherwise we could end up with
27614 all of our entry points into the network run by the same operator.
27615 Suggested by Camilo Viecco. Fix on 0.1.1.11-alpha.
27618 - Fix a DOS opportunity during the voting signature collection process
27619 at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
27620 - Fix a possible segfault when establishing an exit connection. Bugfix
27624 - Get file locking working on win32. Bugfix on 0.2.1.6-alpha. Fixes
27626 - Made Tor a little less aggressive about deleting expired
27627 certificates. Partial fix for bug 854.
27628 - Stop doing unaligned memory access that generated bus errors on
27629 sparc64. Bugfix on 0.2.0.10-alpha. Fix for bug 862.
27630 - Fix a crash bug when changing EntryNodes from the controller. Bugfix
27631 on 0.2.1.6-alpha. Fix for bug 867. Patched by Sebastian.
27632 - Make USR2 log-level switch take effect immediately. Bugfix on
27634 - If one win32 nameserver fails to get added, continue adding the
27635 rest, and don't automatically fail.
27636 - Use fcntl() for locking when flock() is not available. Should fix
27637 compilation on Solaris. Should fix Bug 873. Bugfix on 0.2.1.6-alpha.
27638 - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
27639 could make gcc generate non-functional binary search code. Bugfix
27641 - Build correctly on platforms without socklen_t.
27642 - Avoid potential crash on internal error during signature collection.
27643 Fixes bug 864. Patch from rovv.
27644 - Do not use C's stdio library for writing to log files. This will
27645 improve logging performance by a minute amount, and will stop
27646 leaking fds when our disk is full. Fixes bug 861.
27647 - Stop erroneous use of O_APPEND in cases where we did not in fact
27648 want to re-seek to the end of a file before every last write().
27649 - Correct handling of possible malformed authority signing key
27650 certificates with internal signature types. Fixes bug 880. Bugfix
27652 - Fix a hard-to-trigger resource leak when logging credential status.
27656 - Directory mirrors no longer fetch the v1 directory or
27657 running-routers files. They are obsolete, and nobody asks for them
27658 anymore. This is the first step to making v1 authorities obsolete.
27660 o Minor features (controller):
27661 - Return circuit purposes in response to GETINFO circuit-status. Fixes
27665 Changes in version 0.2.0.32 - 2008-11-20
27666 Tor 0.2.0.32 fixes a major security problem in Debian and Ubuntu
27667 packages (and maybe other packages) noticed by Theo de Raadt, fixes
27668 a smaller security flaw that might allow an attacker to access local
27669 services, further improves hidden service performance, and fixes a
27670 variety of other issues.
27673 - The "User" and "Group" config options did not clear the
27674 supplementary group entries for the Tor process. The "User" option
27675 is now more robust, and we now set the groups to the specified
27676 user's primary group. The "Group" option is now ignored. For more
27677 detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
27678 in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
27679 and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848 and 857.
27680 - The "ClientDNSRejectInternalAddresses" config option wasn't being
27681 consistently obeyed: if an exit relay refuses a stream because its
27682 exit policy doesn't allow it, we would remember what IP address
27683 the relay said the destination address resolves to, even if it's
27684 an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
27687 - Fix a DOS opportunity during the voting signature collection process
27688 at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
27690 o Major bugfixes (hidden services):
27691 - When fetching v0 and v2 rendezvous service descriptors in parallel,
27692 we were failing the whole hidden service request when the v0
27693 descriptor fetch fails, even if the v2 fetch is still pending and
27694 might succeed. Similarly, if the last v2 fetch fails, we were
27695 failing the whole hidden service request even if a v0 fetch is
27696 still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
27697 - When extending a circuit to a hidden service directory to upload a
27698 rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
27699 requests failed, because the router descriptor has not been
27700 downloaded yet. In these cases, do not attempt to upload the
27701 rendezvous descriptor, but wait until the router descriptor is
27702 downloaded and retry. Likewise, do not attempt to fetch a rendezvous
27703 descriptor from a hidden service directory for which the router
27704 descriptor has not yet been downloaded. Fixes bug 767. Bugfix
27708 - Fix several infrequent memory leaks spotted by Coverity.
27709 - When testing for libevent functions, set the LDFLAGS variable
27710 correctly. Found by Riastradh.
27711 - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
27712 bootstrapping with tunneled directory connections. Bugfix on
27713 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
27714 - When asked to connect to A.B.exit:80, if we don't know the IP for A
27715 and we know that server B rejects most-but-not all connections to
27716 port 80, we would previously reject the connection. Now, we assume
27717 the user knows what they were asking for. Fixes bug 752. Bugfix
27718 on 0.0.9rc5. Diagnosed by BarkerJr.
27719 - If we overrun our per-second write limits a little, count this as
27720 having used up our write allocation for the second, and choke
27721 outgoing directory writes. Previously, we had only counted this when
27722 we had met our limits precisely. Fixes bug 824. Patch from by rovv.
27723 Bugfix on 0.2.0.x (??).
27724 - Remove the old v2 directory authority 'lefkada' from the default
27725 list. It has been gone for many months.
27726 - Stop doing unaligned memory access that generated bus errors on
27727 sparc64. Bugfix on 0.2.0.10-alpha. Fixes bug 862.
27728 - Make USR2 log-level switch take effect immediately. Bugfix on
27731 o Minor bugfixes (controller):
27732 - Make DNS resolved events into "CLOSED", not "FAILED". Bugfix on
27733 0.1.2.5-alpha. Fix by Robert Hogan. Resolves bug 807.
27736 Changes in version 0.2.1.7-alpha - 2008-11-08
27737 Tor 0.2.1.7-alpha fixes a major security problem in Debian and Ubuntu
27738 packages (and maybe other packages) noticed by Theo de Raadt, fixes
27739 a smaller security flaw that might allow an attacker to access local
27740 services, adds better defense against DNS poisoning attacks on exit
27741 relays, further improves hidden service performance, and fixes a
27742 variety of other issues.
27745 - The "ClientDNSRejectInternalAddresses" config option wasn't being
27746 consistently obeyed: if an exit relay refuses a stream because its
27747 exit policy doesn't allow it, we would remember what IP address
27748 the relay said the destination address resolves to, even if it's
27749 an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
27750 - The "User" and "Group" config options did not clear the
27751 supplementary group entries for the Tor process. The "User" option
27752 is now more robust, and we now set the groups to the specified
27753 user's primary group. The "Group" option is now ignored. For more
27754 detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
27755 in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
27756 and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848.
27757 - Do not use or believe expired v3 authority certificates. Patch
27758 from Karsten. Bugfix in 0.2.0.x. Fixes bug 851.
27761 - Now NodeFamily and MyFamily config options allow spaces in
27762 identity fingerprints, so it's easier to paste them in.
27763 Suggested by Lucky Green.
27764 - Implement the 0x20 hack to better resist DNS poisoning: set the
27765 case on outgoing DNS requests randomly, and reject responses that do
27766 not match the case correctly. This logic can be disabled with the
27767 ServerDNSRandomizeCase setting, if you are using one of the 0.3%
27768 of servers that do not reliably preserve case in replies. See
27769 "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
27771 - Preserve case in replies to DNSPort requests in order to support
27772 the 0x20 hack for resisting DNS poisoning attacks.
27774 o Hidden service performance improvements:
27775 - When the client launches an introduction circuit, retry with a
27776 new circuit after 30 seconds rather than 60 seconds.
27777 - Launch a second client-side introduction circuit in parallel
27778 after a delay of 15 seconds (based on work by Christian Wilms).
27779 - Hidden services start out building five intro circuits rather
27780 than three, and when the first three finish they publish a service
27781 descriptor using those. Now we publish our service descriptor much
27782 faster after restart.
27785 - Minor fix in the warning messages when you're having problems
27786 bootstrapping; also, be more forgiving of bootstrap problems when
27787 we're still making incremental progress on a given bootstrap phase.
27788 - When we're choosing an exit node for a circuit, and we have
27789 no pending streams, choose a good general exit rather than one that
27790 supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
27791 - Send a valid END cell back when a client tries to connect to a
27792 nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
27793 840. Patch from rovv.
27794 - If a broken client asks a non-exit router to connect somewhere,
27795 do not even do the DNS lookup before rejecting the connection.
27796 Fixes another case of bug 619. Patch from rovv.
27797 - Fix another case of assuming, when a specific exit is requested,
27798 that we know more than the user about what hosts it allows.
27799 Fixes another case of bug 752. Patch from rovv.
27800 - Check which hops rendezvous stream cells are associated with to
27801 prevent possible guess-the-streamid injection attacks from
27802 intermediate hops. Fixes another case of bug 446. Based on patch
27804 - Avoid using a negative right-shift when comparing 32-bit
27805 addresses. Possible fix for bug 845 and bug 811.
27806 - Make the assert_circuit_ok() function work correctly on circuits that
27807 have already been marked for close.
27808 - Fix read-off-the-end-of-string error in unit tests when decoding
27809 introduction points.
27810 - Fix uninitialized size field for memory area allocation: may improve
27811 memory performance during directory parsing.
27812 - Treat duplicate certificate fetches as failures, so that we do
27813 not try to re-fetch an expired certificate over and over and over.
27814 - Do not say we're fetching a certificate when we'll in fact skip it
27815 because of a pending download.
27818 Changes in version 0.2.1.6-alpha - 2008-09-30
27819 Tor 0.2.1.6-alpha further improves performance and robustness of
27820 hidden services, starts work on supporting per-country relay selection,
27821 and fixes a variety of smaller issues.
27824 - Implement proposal 121: make it possible to build hidden services
27825 that only certain clients are allowed to connect to. This is
27826 enforced at several points, so that unauthorized clients are unable
27827 to send INTRODUCE cells to the service, or even (depending on the
27828 type of authentication) to learn introduction points. This feature
27829 raises the bar for certain kinds of active attacks against hidden
27830 services. Code by Karsten Loesing.
27831 - Relays now store and serve v2 hidden service descriptors by default,
27832 i.e., the new default value for HidServDirectoryV2 is 1. This is
27833 the last step in proposal 114, which aims to make hidden service
27834 lookups more reliable.
27835 - Start work to allow node restrictions to include country codes. The
27836 syntax to exclude nodes in a country with country code XX is
27837 "ExcludeNodes {XX}". Patch from Robert Hogan. It still needs some
27838 refinement to decide what config options should take priority if
27839 you ask to both use a particular node and exclude it.
27840 - Allow ExitNodes list to include IP ranges and country codes, just
27841 like the Exclude*Nodes lists. Patch from Robert Hogan.
27844 - Fix a bug when parsing ports in tor_addr_port_parse() that caused
27845 Tor to fail to start if you had it configured to use a bridge
27846 relay. Fixes bug 809. Bugfix on 0.2.1.5-alpha.
27847 - When extending a circuit to a hidden service directory to upload a
27848 rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
27849 requests failed, because the router descriptor had not been
27850 downloaded yet. In these cases, we now wait until the router
27851 descriptor is downloaded, and then retry. Likewise, clients
27852 now skip over a hidden service directory if they don't yet have
27853 its router descriptor, rather than futilely requesting it and
27854 putting mysterious complaints in the logs. Fixes bug 767. Bugfix
27856 - When fetching v0 and v2 rendezvous service descriptors in parallel,
27857 we were failing the whole hidden service request when the v0
27858 descriptor fetch fails, even if the v2 fetch is still pending and
27859 might succeed. Similarly, if the last v2 fetch fails, we were
27860 failing the whole hidden service request even if a v0 fetch is
27861 still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
27862 - DNS replies need to have names matching their requests, but
27863 these names should be in the questions section, not necessarily
27864 in the answers section. Fixes bug 823. Bugfix on 0.2.1.5-alpha.
27867 - Update to the "September 1 2008" ip-to-country file.
27868 - Allow ports 465 and 587 in the default exit policy again. We had
27869 rejected them in 0.1.0.15, because back in 2005 they were commonly
27870 misconfigured and ended up as spam targets. We hear they are better
27871 locked down these days.
27872 - Use a lockfile to make sure that two Tor processes are not
27873 simultaneously running with the same datadir.
27874 - Serve the latest v3 networkstatus consensus via the control
27875 port. Use "getinfo dir/status-vote/current/consensus" to fetch it.
27876 - Better logging about stability/reliability calculations on directory
27878 - Drop the requirement to have an open dir port for storing and
27879 serving v2 hidden service descriptors.
27880 - Directory authorities now serve a /tor/dbg-stability.txt URL to
27881 help debug WFU and MTBF calculations.
27882 - Implement most of Proposal 152: allow specialized servers to permit
27883 single-hop circuits, and clients to use those servers to build
27884 single-hop circuits when using a specialized controller. Patch
27885 from Josh Albrecht. Resolves feature request 768.
27886 - Add a -p option to tor-resolve for specifying the SOCKS port: some
27887 people find host:port too confusing.
27888 - Make TrackHostExit mappings expire a while after their last use, not
27889 after their creation. Patch from Robert Hogan.
27890 - Provide circuit purposes along with circuit events to the controller.
27893 - Fix compile on OpenBSD 4.4-current. Bugfix on 0.2.1.5-alpha.
27895 - Fixed some memory leaks -- some quite frequent, some almost
27896 impossible to trigger -- based on results from Coverity.
27897 - When testing for libevent functions, set the LDFLAGS variable
27898 correctly. Found by Riastradh.
27899 - Fix an assertion bug in parsing policy-related options; possible fix
27901 - Catch and report a few more bootstrapping failure cases when Tor
27902 fails to establish a TCP connection. Cleanup on 0.2.1.x.
27903 - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
27904 bootstrapping with tunneled directory connections. Bugfix on
27905 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
27906 - When asked to connect to A.B.exit:80, if we don't know the IP for A
27907 and we know that server B rejects most-but-not all connections to
27908 port 80, we would previously reject the connection. Now, we assume
27909 the user knows what they were asking for. Fixes bug 752. Bugfix
27910 on 0.0.9rc5. Diagnosed by BarkerJr.
27911 - If we are not using BEGIN_DIR cells, don't attempt to contact hidden
27912 service directories if they have no advertised dir port. Bugfix
27914 - If we overrun our per-second write limits a little, count this as
27915 having used up our write allocation for the second, and choke
27916 outgoing directory writes. Previously, we had only counted this when
27917 we had met our limits precisely. Fixes bug 824. Patch by rovv.
27918 Bugfix on 0.2.0.x (??).
27919 - Avoid a "0 divided by 0" calculation when calculating router uptime
27920 at directory authorities. Bugfix on 0.2.0.8-alpha.
27921 - Make DNS resolved controller events into "CLOSED", not
27922 "FAILED". Bugfix on 0.1.2.5-alpha. Fix by Robert Hogan. Resolves
27924 - Fix a bug where an unreachable relay would establish enough
27925 reachability testing circuits to do a bandwidth test -- if
27926 we already have a connection to the middle hop of the testing
27927 circuit, then it could establish the last hop by using the existing
27928 connection. Bugfix on 0.1.2.2-alpha, exposed when we made testing
27929 circuits no longer use entry guards in 0.2.1.3-alpha.
27930 - If we have correct permissions on $datadir, we complain to stdout
27931 and fail to start. But dangerous permissions on
27932 $datadir/cached-status/ would cause us to open a log and complain
27933 there. Now complain to stdout and fail to start in both cases. Fixes
27934 bug 820, reported by seeess.
27935 - Remove the old v2 directory authority 'lefkada' from the default
27936 list. It has been gone for many months.
27938 o Code simplifications and refactoring:
27939 - Revise the connection_new functions so that a more typesafe variant
27940 exists. This will work better with Coverity, and let us find any
27941 actual mistakes we're making here.
27942 - Refactor unit testing logic so that dmalloc can be used sensibly
27943 with unit tests to check for memory leaks.
27944 - Move all hidden-service related fields from connection and circuit
27945 structure to substructures: this way they won't eat so much memory.
27948 Changes in version 0.2.0.31 - 2008-09-03
27949 Tor 0.2.0.31 addresses two potential anonymity issues, starts to fix
27950 a big bug we're seeing where in rare cases traffic from one Tor stream
27951 gets mixed into another stream, and fixes a variety of smaller issues.
27954 - Make sure that two circuits can never exist on the same connection
27955 with the same circuit ID, even if one is marked for close. This
27956 is conceivably a bugfix for bug 779. Bugfix on 0.1.0.4-rc.
27957 - Relays now reject risky extend cells: if the extend cell includes
27958 a digest of all zeroes, or asks to extend back to the relay that
27959 sent the extend cell, tear down the circuit. Ideas suggested
27961 - If not enough of our entry guards are available so we add a new
27962 one, we might use the new one even if it overlapped with the
27963 current circuit's exit relay (or its family). Anonymity bugfix
27964 pointed out by rovv.
27967 - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
27968 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
27969 - Correctly detect the presence of the linux/netfilter_ipv4.h header
27970 when building against recent kernels. Bugfix on 0.1.2.1-alpha.
27971 - Pick size of default geoip filename string correctly on windows.
27972 Fixes bug 806. Bugfix on 0.2.0.30.
27973 - Make the autoconf script accept the obsolete --with-ssl-dir
27974 option as an alias for the actually-working --with-openssl-dir
27975 option. Fix the help documentation to recommend --with-openssl-dir.
27976 Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
27977 - When using the TransPort option on OpenBSD, and using the User
27978 option to change UID and drop privileges, make sure to open
27979 /dev/pf before dropping privileges. Fixes bug 782. Patch from
27980 Christopher Davis. Bugfix on 0.1.2.1-alpha.
27981 - Try to attach connections immediately upon receiving a RENDEZVOUS2
27982 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
27983 on the client side when connecting to a hidden service. Bugfix
27984 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
27985 - When closing an application-side connection because its circuit is
27986 getting torn down, generate the stream event correctly. Bugfix on
27987 0.1.2.x. Anonymous patch.
27990 Changes in version 0.2.1.5-alpha - 2008-08-31
27991 Tor 0.2.1.5-alpha moves us closer to handling IPv6 destinations, puts
27992 in a lot of the infrastructure for adding authorization to hidden
27993 services, lays the groundwork for having clients read their load
27994 balancing information out of the networkstatus consensus rather than
27995 the individual router descriptors, addresses two potential anonymity
27996 issues, and fixes a variety of smaller issues.
27999 - Convert many internal address representations to optionally hold
28001 - Generate and accept IPv6 addresses in many protocol elements.
28002 - Make resolver code handle nameservers located at ipv6 addresses.
28003 - Begin implementation of proposal 121 ("Client authorization for
28004 hidden services"): configure hidden services with client
28005 authorization, publish descriptors for them, and configure
28006 authorization data for hidden services at clients. The next
28007 step is to actually access hidden services that perform client
28009 - More progress toward proposal 141: Network status consensus
28010 documents and votes now contain bandwidth information for each
28011 router and a summary of that router's exit policy. Eventually this
28012 will be used by clients so that they do not have to download every
28013 known descriptor before building circuits.
28015 o Major bugfixes (on 0.2.0.x and before):
28016 - When sending CREATED cells back for a given circuit, use a 64-bit
28017 connection ID to find the right connection, rather than an addr:port
28018 combination. Now that we can have multiple OR connections between
28019 the same ORs, it is no longer possible to use addr:port to uniquely
28020 identify a connection.
28021 - Relays now reject risky extend cells: if the extend cell includes
28022 a digest of all zeroes, or asks to extend back to the relay that
28023 sent the extend cell, tear down the circuit. Ideas suggested
28025 - If not enough of our entry guards are available so we add a new
28026 one, we might use the new one even if it overlapped with the
28027 current circuit's exit relay (or its family). Anonymity bugfix
28028 pointed out by rovv.
28031 - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
28032 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
28033 - When using the TransPort option on OpenBSD, and using the User
28034 option to change UID and drop privileges, make sure to open /dev/pf
28035 before dropping privileges. Fixes bug 782. Patch from Christopher
28036 Davis. Bugfix on 0.1.2.1-alpha.
28037 - Correctly detect the presence of the linux/netfilter_ipv4.h header
28038 when building against recent kernels. Bugfix on 0.1.2.1-alpha.
28039 - Add a missing safe_str() call for a debug log message.
28040 - Use 64 bits instead of 32 bits for connection identifiers used with
28041 the controller protocol, to greatly reduce risk of identifier reuse.
28042 - Make the autoconf script accept the obsolete --with-ssl-dir
28043 option as an alias for the actually-working --with-openssl-dir
28044 option. Fix the help documentation to recommend --with-openssl-dir.
28045 Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
28048 - Rate-limit too-many-sockets messages: when they happen, they happen
28049 a lot. Resolves bug 748.
28050 - Resist DNS poisoning a little better by making sure that names in
28051 answer sections match.
28052 - Print the SOCKS5 error message string as well as the error code
28053 when a tor-resolve request fails. Patch from Jacob.
28056 Changes in version 0.2.1.4-alpha - 2008-08-04
28057 Tor 0.2.1.4-alpha fixes a pair of crash bugs in 0.2.1.3-alpha.
28060 - The address part of exit policies was not correctly written
28061 to router descriptors. This generated router descriptors that failed
28062 their self-checks. Noticed by phobos, fixed by Karsten. Bugfix
28064 - Tor triggered a false assert when extending a circuit to a relay
28065 but we already have a connection open to that relay. Noticed by
28066 phobos, fixed by Karsten. Bugfix on 0.2.1.3-alpha.
28069 - Fix a hidden service logging bug: in some edge cases, the router
28070 descriptor of a previously picked introduction point becomes
28071 obsolete and we need to give up on it rather than continually
28072 complaining that it has become obsolete. Observed by xiando. Bugfix
28075 o Removed features:
28076 - Take out the TestVia config option, since it was a workaround for
28077 a bug that was fixed in Tor 0.1.1.21.
28080 Changes in version 0.2.1.3-alpha - 2008-08-03
28081 Tor 0.2.1.3-alpha implements most of the pieces to prevent
28082 infinite-length circuit attacks (see proposal 110); fixes a bug that
28083 might cause exit relays to corrupt streams they send back; allows
28084 address patterns (e.g. 255.128.0.0/16) to appear in ExcludeNodes and
28085 ExcludeExitNodes config options; and fixes a big pile of bugs.
28087 o Bootstrapping bugfixes (on 0.2.1.x-alpha):
28088 - Send a bootstrap problem "warn" event on the first problem if the
28089 reason is NO_ROUTE (that is, our network is down).
28092 - Implement most of proposal 110: The first K cells to be sent
28093 along a circuit are marked as special "early" cells; only K "early"
28094 cells will be allowed. Once this code is universal, we can block
28095 certain kinds of DOS attack by requiring that EXTEND commands must
28096 be sent using an "early" cell.
28099 - Try to attach connections immediately upon receiving a RENDEZVOUS2
28100 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
28101 on the client side when connecting to a hidden service. Bugfix
28102 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
28103 - Ensure that two circuits can never exist on the same connection
28104 with the same circuit ID, even if one is marked for close. This
28105 is conceivably a bugfix for bug 779; fixes a bug on 0.1.0.4-rc.
28108 - When relays do their initial bandwidth measurement, don't limit
28109 to just our entry guards for the test circuits. Otherwise we tend
28110 to have multiple test circuits going through a single entry guard,
28111 which makes our bandwidth test less accurate. Fixes part of bug 654;
28112 patch contributed by Josh Albrecht.
28113 - Add an ExcludeExitNodes option so users can list a set of nodes
28114 that should be be excluded from the exit node position, but
28115 allowed elsewhere. Implements proposal 151.
28116 - Allow address patterns (e.g., 255.128.0.0/16) to appear in
28117 ExcludeNodes and ExcludeExitNodes lists.
28118 - Change the implementation of ExcludeNodes and ExcludeExitNodes to
28119 be more efficient. Formerly it was quadratic in the number of
28120 servers; now it should be linear. Fixes bug 509.
28121 - Save 16-22 bytes per open circuit by moving the n_addr, n_port,
28122 and n_conn_id_digest fields into a separate structure that's
28123 only needed when the circuit has not yet attached to an n_conn.
28126 - Change the contrib/tor.logrotate script so it makes the new
28127 logs as "_tor:_tor" rather than the default, which is generally
28128 "root:wheel". Fixes bug 676, reported by Serge Koksharov.
28129 - Stop using __attribute__((nonnull)) with GCC: it can give us useful
28130 warnings (occasionally), but it can also cause the compiler to
28131 eliminate error-checking code. Suggested by Peter Gutmann.
28132 - When a hidden service is giving up on an introduction point candidate
28133 that was not included in the last published rendezvous descriptor,
28134 don't reschedule publication of the next descriptor. Fixes bug 763.
28136 - Mark RendNodes, RendExcludeNodes, HiddenServiceNodes, and
28137 HiddenServiceExcludeNodes as obsolete: they never worked properly,
28138 and nobody claims to be using them. Fixes bug 754. Bugfix on
28139 0.1.0.1-rc. Patch from Christian Wilms.
28140 - Fix a small alignment and memory-wasting bug on buffer chunks.
28143 o Minor bugfixes (controller):
28144 - When closing an application-side connection because its circuit
28145 is getting torn down, generate the stream event correctly.
28146 Bugfix on 0.1.2.x. Anonymous patch.
28148 o Removed features:
28149 - Remove all backward-compatibility code to support relays running
28150 versions of Tor so old that they no longer work at all on the
28154 Changes in version 0.2.0.30 - 2008-07-15
28156 - Stop using __attribute__((nonnull)) with GCC: it can give us useful
28157 warnings (occasionally), but it can also cause the compiler to
28158 eliminate error-checking code. Suggested by Peter Gutmann.
28161 Changes in version 0.2.0.29-rc - 2008-07-08
28162 Tor 0.2.0.29-rc fixes two big bugs with using bridges, fixes more
28163 hidden-service performance bugs, and fixes a bunch of smaller bugs.
28166 - If you have more than one bridge but don't know their keys,
28167 you would only launch a request for the descriptor of the first one
28168 on your list. (Tor considered launching requests for the others, but
28169 found that it already had a connection on the way for $0000...0000
28170 so it didn't open another.) Bugfix on 0.2.0.x.
28171 - If you have more than one bridge but don't know their keys, and the
28172 connection to one of the bridges failed, you would cancel all
28173 pending bridge connections. (After all, they all have the same
28174 digest.) Bugfix on 0.2.0.x.
28175 - When a hidden service was trying to establish an introduction point,
28176 and Tor had built circuits preemptively for such purposes, we
28177 were ignoring all the preemptive circuits and launching a new one
28178 instead. Bugfix on 0.2.0.14-alpha.
28179 - When a hidden service was trying to establish an introduction point,
28180 and Tor *did* manage to reuse one of the preemptively built
28181 circuits, it didn't correctly remember which one it used,
28182 so it asked for another one soon after, until there were no
28183 more preemptive circuits, at which point it launched one from
28184 scratch. Bugfix on 0.0.9.x.
28185 - Make directory servers include the X-Your-Address-Is: http header in
28186 their responses even for begin_dir conns. Now clients who only
28187 ever use begin_dir connections still have a way to learn their IP
28188 address. Fixes bug 737; bugfix on 0.2.0.22-rc. Reported by goldy.
28191 - Fix a macro/CPP interaction that was confusing some compilers:
28192 some GCCs don't like #if/#endif pairs inside macro arguments.
28194 - Fix macro collision between OpenSSL 0.9.8h and Windows headers.
28195 Fixes bug 704; fix from Steven Murdoch.
28196 - When opening /dev/null in finish_daemonize(), do not pass the
28197 O_CREAT flag. Fortify was complaining, and correctly so. Fixes
28198 bug 742; fix from Michael Scherer. Bugfix on 0.0.2pre19.
28199 - Correctly detect transparent proxy support on Linux hosts that
28200 require in.h to be included before netfilter_ipv4.h. Patch
28202 - Disallow session resumption attempts during the renegotiation
28203 stage of the v2 handshake protocol. Clients should never be trying
28204 session resumption at this point, but apparently some did, in
28205 ways that caused the handshake to fail. Bugfix on 0.2.0.20-rc. Bug
28206 found by Geoff Goodell.
28209 Changes in version 0.2.1.2-alpha - 2008-06-20
28210 Tor 0.2.1.2-alpha includes a new "TestingTorNetwork" config option to
28211 make it easier to set up your own private Tor network; fixes several
28212 big bugs with using more than one bridge relay; fixes a big bug with
28213 offering hidden services quickly after Tor starts; and uses a better
28214 API for reporting potential bootstrapping problems to the controller.
28217 - New TestingTorNetwork config option to allow adjustment of
28218 previously constant values that, while reasonable, could slow
28219 bootstrapping. Implements proposal 135. Patch from Karsten.
28222 - If you have more than one bridge but don't know their digests,
28223 you would only learn a request for the descriptor of the first one
28224 on your list. (Tor considered launching requests for the others, but
28225 found that it already had a connection on the way for $0000...0000
28226 so it didn't open another.) Bugfix on 0.2.0.x.
28227 - If you have more than one bridge but don't know their digests,
28228 and the connection to one of the bridges failed, you would cancel
28229 all pending bridge connections. (After all, they all have the
28230 same digest.) Bugfix on 0.2.0.x.
28231 - When establishing a hidden service, introduction points that
28232 originate from cannibalized circuits are completely ignored and not
28233 included in rendezvous service descriptors. This might be another
28234 reason for delay in making a hidden service available. Bugfix
28235 from long ago (0.0.9.x?)
28238 - Allow OpenSSL to use dynamic locks if it wants.
28239 - When building a consensus, do not include routers that are down.
28240 This will cut down 30% to 40% on consensus size. Implements
28242 - In directory authorities' approved-routers files, allow
28243 fingerprints with or without space.
28244 - Add a "GETINFO /status/bootstrap-phase" controller option, so the
28245 controller can query our current bootstrap state in case it attaches
28246 partway through and wants to catch up.
28247 - Send an initial "Starting" bootstrap status event, so we have a
28248 state to start out in.
28251 - Asking for a conditional consensus at .../consensus/<fingerprints>
28252 would crash a dirserver if it did not already have a
28253 consensus. Bugfix on 0.2.1.1-alpha.
28254 - Clean up some macro/CPP interactions: some GCC versions don't like
28255 #if/#endif pairs inside macro arguments. Fixes bug 707. Bugfix on
28258 o Bootstrapping bugfixes (on 0.2.1.1-alpha):
28259 - Directory authorities shouldn't complain about bootstrapping
28260 problems just because they do a lot of reachability testing and
28261 some of the connection attempts fail.
28262 - Start sending "count" and "recommendation" key/value pairs in
28263 bootstrap problem status events, so the controller can hear about
28264 problems even before Tor decides they're worth reporting for sure.
28265 - If you're using bridges, generate "bootstrap problem" warnings
28266 as soon as you run out of working bridges, rather than waiting
28267 for ten failures -- which will never happen if you have less than
28269 - If we close our OR connection because there's been a circuit
28270 pending on it for too long, we were telling our bootstrap status
28271 events "REASON=NONE". Now tell them "REASON=TIMEOUT".
28274 Changes in version 0.2.1.1-alpha - 2008-06-13
28275 Tor 0.2.1.1-alpha fixes a lot of memory fragmentation problems that
28276 were making the Tor process bloat especially on Linux; makes our TLS
28277 handshake blend in better; sends "bootstrap phase" status events to
28278 the controller, so it can keep the user informed of progress (and
28279 problems) fetching directory information and establishing circuits;
28280 and adds a variety of smaller features.
28283 - More work on making our TLS handshake blend in: modify the list
28284 of ciphers advertised by OpenSSL in client mode to even more
28285 closely resemble a common web browser. We cheat a little so that
28286 we can advertise ciphers that the locally installed OpenSSL doesn't
28288 - Start sending "bootstrap phase" status events to the controller,
28289 so it can keep the user informed of progress fetching directory
28290 information and establishing circuits. Also inform the controller
28291 if we think we're stuck at a particular bootstrap phase. Implements
28293 - Resume using OpenSSL's RAND_poll() for better (and more portable)
28294 cross-platform entropy collection again. We used to use it, then
28295 stopped using it because of a bug that could crash systems that
28296 called RAND_poll when they had a lot of fds open. It looks like the
28297 bug got fixed in late 2006. Our new behavior is to call RAND_poll()
28298 at startup, and to call RAND_poll() when we reseed later only if
28299 we have a non-buggy OpenSSL version.
28302 - When we choose to abandon a new entry guard because we think our
28303 older ones might be better, close any circuits pending on that
28304 new entry guard connection. This fix should make us recover much
28305 faster when our network is down and then comes back. Bugfix on
28306 0.1.2.8-beta; found by lodger.
28308 o Memory fixes and improvements:
28309 - Add a malloc_good_size implementation to OpenBSD_malloc_linux.c,
28310 to avoid unused RAM in buffer chunks and memory pools.
28311 - Speed up parsing and cut down on memory fragmentation by using
28312 stack-style allocations for parsing directory objects. Previously,
28313 this accounted for over 40% of allocations from within Tor's code
28314 on a typical directory cache.
28315 - Use a Bloom filter rather than a digest-based set to track which
28316 descriptors we need to keep around when we're cleaning out old
28317 router descriptors. This speeds up the computation significantly,
28318 and may reduce fragmentation.
28319 - Reduce the default smartlist size from 32 to 16; it turns out that
28320 most smartlists hold around 8-12 elements tops.
28321 - Make dumpstats() log the fullness and size of openssl-internal
28323 - If the user has applied the experimental SSL_MODE_RELEASE_BUFFERS
28324 patch to their OpenSSL, turn it on to save memory on servers. This
28325 patch will (with any luck) get included in a mainline distribution
28327 - Never use OpenSSL compression: it wastes RAM and CPU trying to
28328 compress cells, which are basically all encrypted, compressed,
28332 - Stop reloading the router list from disk for no reason when we
28333 run out of reachable directory mirrors. Once upon a time reloading
28334 it would set the 'is_running' flag back to 1 for them. It hasn't
28335 done that for a long time.
28336 - In very rare situations new hidden service descriptors were
28337 published earlier than 30 seconds after the last change to the
28338 service. (We currently think that a hidden service descriptor
28339 that's been stable for 30 seconds is worth publishing.)
28342 - Allow separate log levels to be configured for different logging
28343 domains. For example, this allows one to log all notices, warnings,
28344 or errors, plus all memory management messages of level debug or
28345 higher, with: Log [MM] debug-err [*] notice-err file /var/log/tor.
28346 - Add a couple of extra warnings to --enable-gcc-warnings for GCC 4.3,
28347 and stop using a warning that had become unfixably verbose under
28349 - New --hush command-line option similar to --quiet. While --quiet
28350 disables all logging to the console on startup, --hush limits the
28351 output to messages of warning and error severity.
28352 - Servers support a new URL scheme for consensus downloads that
28353 allows the client to specify which authorities are trusted.
28354 The server then only sends the consensus if the client will trust
28355 it. Otherwise a 404 error is sent back. Clients use this
28356 new scheme when the server supports it (meaning it's running
28357 0.2.1.1-alpha or later). Implements proposal 134.
28358 - New configure/torrc options (--enable-geoip-stats,
28359 DirRecordUsageByCountry) to record how many IPs we've served
28360 directory info to in each country code, how many status documents
28361 total we've sent to each country code, and what share of the total
28362 directory requests we should expect to see.
28363 - Use the TLS1 hostname extension to more closely resemble browser
28365 - Lots of new unit tests.
28366 - Add a macro to implement the common pattern of iterating through
28367 two parallel lists in lockstep.
28370 Changes in version 0.2.0.28-rc - 2008-06-13
28371 Tor 0.2.0.28-rc fixes an anonymity-related bug, fixes a hidden-service
28372 performance bug, and fixes a bunch of smaller bugs.
28375 - Fix a bug where, when we were choosing the 'end stream reason' to
28376 put in our relay end cell that we send to the exit relay, Tor
28377 clients on Windows were sometimes sending the wrong 'reason'. The
28378 anonymity problem is that exit relays may be able to guess whether
28379 the client is running Windows, thus helping partition the anonymity
28380 set. Down the road we should stop sending reasons to exit relays,
28381 or otherwise prevent future versions of this bug.
28384 - While setting up a hidden service, some valid introduction circuits
28385 were overlooked and abandoned. This might be the reason for
28386 the long delay in making a hidden service available. Bugfix on
28390 - Update to the "June 9 2008" ip-to-country file.
28391 - Run 'make test' as part of 'make dist', so we stop releasing so
28392 many development snapshots that fail their unit tests.
28395 - When we're checking if we have enough dir info for each relay
28396 to begin establishing circuits, make sure that we actually have
28397 the descriptor listed in the consensus, not just any descriptor.
28399 - Bridge relays no longer print "xx=0" in their extrainfo document
28400 for every single country code in the geoip db. Bugfix on
28402 - Only warn when we fail to load the geoip file if we were planning to
28403 include geoip stats in our extrainfo document. Bugfix on 0.2.0.27-rc.
28404 - If we change our MaxAdvertisedBandwidth and then reload torrc,
28405 Tor won't realize it should publish a new relay descriptor. Fixes
28406 bug 688, reported by mfr. Bugfix on 0.1.2.x.
28407 - When we haven't had any application requests lately, don't bother
28408 logging that we have expired a bunch of descriptors. Bugfix
28410 - Make relay cells written on a connection count as non-padding when
28411 tracking how long a connection has been in use. Bugfix on
28412 0.2.0.1-alpha. Spotted by lodger.
28413 - Fix unit tests in 0.2.0.27-rc.
28414 - Fix compile on Windows.
28417 Changes in version 0.2.0.27-rc - 2008-06-03
28418 Tor 0.2.0.27-rc adds a few features we left out of the earlier
28419 release candidates. In particular, we now include an IP-to-country
28420 GeoIP database, so controllers can easily look up what country a
28421 given relay is in, and so bridge relays can give us some sanitized
28422 summaries about which countries are making use of bridges. (See proposal
28423 126-geoip-fetching.txt for details.)
28426 - Include an IP-to-country GeoIP file in the tarball, so bridge
28427 relays can report sanitized summaries of the usage they're seeing.
28430 - Add a "PURPOSE=" argument to "STREAM NEW" events, as suggested by
28431 Robert Hogan. Fixes the first part of bug 681.
28432 - Make bridge authorities never serve extrainfo docs.
28433 - Add support to detect Libevent versions in the 1.4.x series
28435 - Fix build on gcc 4.3 with --enable-gcc-warnings set.
28436 - Include a new contrib/tor-exit-notice.html file that exit relay
28437 operators can put on their website to help reduce abuse queries.
28440 - When tunneling an encrypted directory connection, and its first
28441 circuit fails, do not leave it unattached and ask the controller
28442 to deal. Fixes the second part of bug 681.
28443 - Make bridge authorities correctly expire old extrainfo documents
28447 Changes in version 0.2.0.26-rc - 2008-05-13
28448 Tor 0.2.0.26-rc fixes a major security vulnerability caused by a bug
28449 in Debian's OpenSSL packages. All users running any 0.2.0.x version
28450 should upgrade, whether they're running Debian or not.
28452 o Major security fixes:
28453 - Use new V3 directory authority keys on the tor26, gabelmoo, and
28454 moria1 V3 directory authorities. The old keys were generated with
28455 a vulnerable version of Debian's OpenSSL package, and must be
28456 considered compromised. Other authorities' keys were not generated
28457 with an affected version of OpenSSL.
28460 - List authority signatures as "unrecognized" based on DirServer
28461 lines, not on cert cache. Bugfix on 0.2.0.x.
28464 - Add a new V3AuthUseLegacyKey option to make it easier for
28465 authorities to change their identity keys if they have to.
28468 Changes in version 0.2.0.25-rc - 2008-04-23
28469 Tor 0.2.0.25-rc makes Tor work again on OS X and certain BSDs.
28472 - Remember to initialize threading before initializing logging.
28473 Otherwise, many BSD-family implementations will crash hard on
28474 startup. Fixes bug 671. Bugfix on 0.2.0.24-rc.
28477 - Authorities correctly free policies on bad servers on
28478 exit. Fixes bug 672. Bugfix on 0.2.0.x.
28481 Changes in version 0.2.0.24-rc - 2008-04-22
28482 Tor 0.2.0.24-rc adds dizum (run by Alex de Joode) as the new sixth
28483 v3 directory authority, makes relays with dynamic IP addresses and no
28484 DirPort notice more quickly when their IP address changes, fixes a few
28485 rare crashes and memory leaks, and fixes a few other miscellaneous bugs.
28487 o New directory authorities:
28488 - Take lefkada out of the list of v3 directory authorities, since
28489 it has been down for months.
28490 - Set up dizum (run by Alex de Joode) as the new sixth v3 directory
28494 - Detect address changes more quickly on non-directory mirror
28495 relays. Bugfix on 0.2.0.18-alpha; fixes bug 652.
28497 o Minor features (security):
28498 - Reject requests for reverse-dns lookup of names that are in
28499 a private address space. Patch from lodger.
28500 - Non-exit relays no longer allow DNS requests. Fixes bug 619. Patch
28503 o Minor bugfixes (crashes):
28504 - Avoid a rare assert that can trigger when Tor doesn't have much
28505 directory information yet and it tries to fetch a v2 hidden
28506 service descriptor. Fixes bug 651, reported by nwf.
28507 - Initialize log mutex before initializing dmalloc. Otherwise,
28508 running with dmalloc would crash. Bugfix on 0.2.0.x-alpha.
28509 - Use recursive pthread mutexes in order to avoid deadlock when
28510 logging debug-level messages to a controller. Bug spotted by nwf,
28511 bugfix on 0.2.0.16-alpha.
28513 o Minor bugfixes (resource management):
28514 - Keep address policies from leaking memory: start their refcount
28515 at 1, not 2. Bugfix on 0.2.0.16-alpha.
28516 - Free authority certificates on exit, so they don't look like memory
28517 leaks. Bugfix on 0.2.0.19-alpha.
28518 - Free static hashtables for policy maps and for TLS connections on
28519 shutdown, so they don't look like memory leaks. Bugfix on 0.2.0.x.
28520 - Avoid allocating extra space when computing consensuses on 64-bit
28521 platforms. Bug spotted by aakova.
28523 o Minor bugfixes (misc):
28524 - Do not read the configuration file when we've only been told to
28525 generate a password hash. Fixes bug 643. Bugfix on 0.0.9pre5. Fix
28526 based on patch from Sebastian Hahn.
28527 - Exit relays that are used as a client can now reach themselves
28528 using the .exit notation, rather than just launching an infinite
28529 pile of circuits. Fixes bug 641. Reported by Sebastian Hahn.
28530 - When attempting to open a logfile fails, tell us why.
28531 - Fix a dumb bug that was preventing us from knowing that we should
28532 preemptively build circuits to handle expected directory requests.
28533 Fixes bug 660. Bugfix on 0.1.2.x.
28534 - Warn less verbosely about clock skew from netinfo cells from
28535 untrusted sources. Fixes bug 663.
28536 - Make controller stream events for DNS requests more consistent,
28537 by adding "new stream" events for DNS requests, and removing
28538 spurious "stream closed" events" for cached reverse resolves.
28539 Patch from mwenge. Fixes bug 646.
28540 - Correctly notify one-hop connections when a circuit build has
28541 failed. Possible fix for bug 669. Found by lodger.
28544 Changes in version 0.2.0.23-rc - 2008-03-24
28545 Tor 0.2.0.23-rc is the fourth release candidate for the 0.2.0 series. It
28546 makes bootstrapping faster if the first directory mirror you contact
28547 is down. The bundles also include the new Vidalia 0.1.2 release.
28550 - When a tunneled directory request is made to a directory server
28551 that's down, notice after 30 seconds rather than 120 seconds. Also,
28552 fail any begindir streams that are pending on it, so they can
28553 retry elsewhere. This was causing multi-minute delays on bootstrap.
28556 Changes in version 0.2.0.22-rc - 2008-03-18
28557 Tor 0.2.0.22-rc is the third release candidate for the 0.2.0 series. It
28558 enables encrypted directory connections by default for non-relays, fixes
28559 some broken TLS behavior we added in 0.2.0.20-rc, and resolves many
28560 other bugs. The bundles also include Vidalia 0.1.1 and Torbutton 1.1.17.
28563 - Enable encrypted directory connections by default for non-relays,
28564 so censor tools that block Tor directory connections based on their
28565 plaintext patterns will no longer work. This means Tor works in
28566 certain censored countries by default again.
28569 - Make sure servers always request certificates from clients during
28570 TLS renegotiation. Reported by lodger; bugfix on 0.2.0.20-rc.
28571 - Do not enter a CPU-eating loop when a connection is closed in
28572 the middle of client-side TLS renegotiation. Fixes bug 622. Bug
28573 diagnosed by lodger; bugfix on 0.2.0.20-rc.
28574 - Fix assertion failure that could occur when a blocked circuit
28575 became unblocked, and it had pending client DNS requests. Bugfix
28576 on 0.2.0.1-alpha. Fixes bug 632.
28578 o Minor bugfixes (on 0.1.2.x):
28579 - Generate "STATUS_SERVER" events rather than misspelled
28580 "STATUS_SEVER" events. Caught by mwenge.
28581 - When counting the number of bytes written on a TLS connection,
28582 look at the BIO actually used for writing to the network, not
28583 at the BIO used (sometimes) to buffer data for the network.
28584 Looking at different BIOs could result in write counts on the
28585 order of ULONG_MAX. Fixes bug 614.
28586 - On Windows, correctly detect errors when listing the contents of
28587 a directory. Fix from lodger.
28589 o Minor bugfixes (on 0.2.0.x):
28590 - Downgrade "sslv3 alert handshake failure" message to INFO.
28591 - If we set RelayBandwidthRate and RelayBandwidthBurst very high but
28592 left BandwidthRate and BandwidthBurst at the default, we would be
28593 silently limited by those defaults. Now raise them to match the
28594 RelayBandwidth* values.
28595 - Fix the SVK version detection logic to work correctly on a branch.
28596 - Make --enable-openbsd-malloc work correctly on Linux with alpha
28597 CPUs. Fixes bug 625.
28598 - Logging functions now check that the passed severity is sane.
28599 - Use proper log levels in the testsuite call of
28600 get_interface_address6().
28601 - When using a nonstandard malloc, do not use the platform values for
28602 HAVE_MALLOC_GOOD_SIZE or HAVE_MALLOC_USABLE_SIZE.
28603 - Make the openbsd malloc code use 8k pages on alpha CPUs and
28605 - Detect mismatched page sizes when using --enable-openbsd-malloc.
28606 - Avoid double-marked-for-close warning when certain kinds of invalid
28607 .in-addr.arpa addresses are passed to the DNSPort. Part of a fix
28608 for bug 617. Bugfix on 0.2.0.1-alpha.
28609 - Make sure that the "NULL-means-reject *:*" convention is followed by
28610 all the policy manipulation functions, avoiding some possible crash
28611 bugs. Bug found by lodger. Bugfix on 0.2.0.16-alpha.
28612 - Fix the implementation of ClientDNSRejectInternalAddresses so that it
28613 actually works, and doesn't warn about every single reverse lookup.
28614 Fixes the other part of bug 617. Bugfix on 0.2.0.1-alpha.
28617 - Only log guard node status when guard node status has changed.
28618 - Downgrade the 3 most common "INFO" messages to "DEBUG". This will
28619 make "INFO" 75% less verbose.
28622 Changes in version 0.2.0.21-rc - 2008-03-02
28623 Tor 0.2.0.21-rc is the second release candidate for the 0.2.0 series. It
28624 makes Tor work well with Vidalia again, fixes a rare assert bug,
28625 and fixes a pair of more minor bugs. The bundles also include Vidalia
28626 0.1.0 and Torbutton 1.1.16.
28629 - The control port should declare that it requires password auth
28630 when HashedControlSessionPassword is set too. Patch from Matt Edman;
28631 bugfix on 0.2.0.20-rc. Fixes bug 615.
28632 - Downgrade assert in connection_buckets_decrement() to a log message.
28633 This may help us solve bug 614, and in any case will make its
28634 symptoms less severe. Bugfix on 0.2.0.20-rc. Reported by fredzupy.
28635 - We were sometimes miscounting the number of bytes read from the
28636 network, causing our rate limiting to not be followed exactly.
28637 Bugfix on 0.2.0.16-alpha. Reported by lodger.
28640 - Fix compilation with OpenSSL 0.9.8 and 0.9.8a. All other supported
28641 OpenSSL versions should have been working fine. Diagnosis and patch
28642 from lodger, Karsten Loesing, and Sebastian Hahn. Fixes bug 616.
28643 Bugfix on 0.2.0.20-rc.
28646 Changes in version 0.2.0.20-rc - 2008-02-24
28647 Tor 0.2.0.20-rc is the first release candidate for the 0.2.0 series. It
28648 makes more progress towards normalizing Tor's TLS handshake, makes
28649 hidden services work better again, helps relays bootstrap if they don't
28650 know their IP address, adds optional support for linking in openbsd's
28651 allocator or tcmalloc, allows really fast relays to scale past 15000
28652 sockets, and fixes a bunch of minor bugs reported by Veracode.
28655 - Enable the revised TLS handshake based on the one designed by
28656 Steven Murdoch in proposal 124, as revised in proposal 130. It
28657 includes version negotiation for OR connections as described in
28658 proposal 105. The new handshake is meant to be harder for censors
28659 to fingerprint, and it adds the ability to detect certain kinds of
28660 man-in-the-middle traffic analysis attacks. The version negotiation
28661 feature will allow us to improve Tor's link protocol more safely
28663 - Choose which bridge to use proportional to its advertised bandwidth,
28664 rather than uniformly at random. This should speed up Tor for
28665 bridge users. Also do this for people who set StrictEntryNodes.
28666 - When a TrackHostExits-chosen exit fails too many times in a row,
28667 stop using it. Bugfix on 0.1.2.x; fixes bug 437.
28670 - Resolved problems with (re-)fetching hidden service descriptors.
28671 Patch from Karsten Loesing; fixes problems with 0.2.0.18-alpha
28672 and 0.2.0.19-alpha.
28673 - If we only ever used Tor for hidden service lookups or posts, we
28674 would stop building circuits and start refusing connections after
28675 24 hours, since we falsely believed that Tor was dormant. Reported
28676 by nwf; bugfix on 0.1.2.x.
28677 - Servers that don't know their own IP address should go to the
28678 authorities for their first directory fetch, even if their DirPort
28679 is off or if they don't know they're reachable yet. This will help
28680 them bootstrap better. Bugfix on 0.2.0.18-alpha; fixes bug 609.
28681 - When counting the number of open sockets, count not only the number
28682 of sockets we have received from the socket() call, but also
28683 the number we've gotten from accept() and socketpair(). This bug
28684 made us fail to count all sockets that we were using for incoming
28685 connections. Bugfix on 0.2.0.x.
28686 - Fix code used to find strings within buffers, when those strings
28687 are not in the first chunk of the buffer. Bugfix on 0.2.0.x.
28688 - Fix potential segfault when parsing HTTP headers. Bugfix on 0.2.0.x.
28689 - Add a new __HashedControlSessionPassword option for controllers
28690 to use for one-off session password hashes that shouldn't get
28691 saved to disk by SAVECONF --- Vidalia users were accumulating a
28692 pile of HashedControlPassword lines in their torrc files, one for
28693 each time they had restarted Tor and then clicked Save. Make Tor
28694 automatically convert "HashedControlPassword" to this new option but
28695 only when it's given on the command line. Partial fix for bug 586.
28697 o Minor features (performance):
28698 - Tune parameters for cell pool allocation to minimize amount of
28700 - Add OpenBSD malloc code from phk as an optional malloc
28701 replacement on Linux: some glibc libraries do very poorly
28702 with Tor's memory allocation patterns. Pass
28703 --enable-openbsd-malloc to get the replacement malloc code.
28704 - Add a --with-tcmalloc option to the configure script to link
28705 against tcmalloc (if present). Does not yet search for
28706 non-system include paths.
28707 - Stop imposing an arbitrary maximum on the number of file descriptors
28708 used for busy servers. Bug reported by Olaf Selke; patch from
28711 o Minor features (other):
28712 - When SafeLogging is disabled, log addresses along with all TLS
28714 - When building with --enable-gcc-warnings, check for whether Apple's
28715 warning "-Wshorten-64-to-32" is available.
28716 - Add a --passphrase-fd argument to the tor-gencert command for
28719 o Minor bugfixes (memory leaks and code problems):
28720 - We were leaking a file descriptor if Tor started with a zero-length
28721 cached-descriptors file. Patch by freddy77; bugfix on 0.1.2.
28722 - Detect size overflow in zlib code. Reported by Justin Ferguson and
28724 - We were comparing the raw BridgePassword entry with a base64'ed
28725 version of it, when handling a "/tor/networkstatus-bridges"
28726 directory request. Now compare correctly. Noticed by Veracode.
28727 - Recover from bad tracked-since value in MTBF-history file.
28728 Should fix bug 537.
28729 - Alter the code that tries to recover from unhandled write
28730 errors, to not try to flush onto a socket that's given us
28731 unhandled errors. Bugfix on 0.1.2.x.
28732 - Make Unix controlsockets work correctly on OpenBSD. Patch from
28733 tup. Bugfix on 0.2.0.3-alpha.
28735 o Minor bugfixes (other):
28736 - If we have an extra-info document for our server, always make
28737 it available on the control port, even if we haven't gotten
28738 a copy of it from an authority yet. Patch from mwenge.
28739 - Log the correct memory chunk sizes for empty RAM chunks in mempool.c.
28740 - Directory mirrors no longer include a guess at the client's IP
28741 address if the connection appears to be coming from the same /24
28742 network; it was producing too many wrong guesses.
28743 - Make the new hidden service code respect the SafeLogging setting.
28744 Bugfix on 0.2.0.x. Patch from Karsten.
28745 - When starting as an authority, do not overwrite all certificates
28746 cached from other authorities. Bugfix on 0.2.0.x. Fixes bug 606.
28747 - If we're trying to flush the last bytes on a connection (for
28748 example, when answering a directory request), reset the
28749 time-to-give-up timeout every time we manage to write something
28750 on the socket. Bugfix on 0.1.2.x.
28751 - Change the behavior of "getinfo status/good-server-descriptor"
28752 so it doesn't return failure when any authority disappears.
28753 - Even though the man page said that "TrackHostExits ." should
28754 work, nobody had ever implemented it. Bugfix on 0.1.0.x.
28755 - Report TLS "zero return" case as a "clean close" and "IO error"
28756 as a "close". Stop calling closes "unexpected closes": existing
28757 Tors don't use SSL_close(), so having a connection close without
28758 the TLS shutdown handshake is hardly unexpected.
28759 - Send NAMESERVER_STATUS messages for a single failed nameserver
28762 o Code simplifications and refactoring:
28763 - Remove the tor_strpartition function: its logic was confused,
28764 and it was only used for one thing that could be implemented far
28768 Changes in version 0.2.0.19-alpha - 2008-02-09
28769 Tor 0.2.0.19-alpha makes more progress towards normalizing Tor's TLS
28770 handshake, makes path selection for relays more secure and IP address
28771 guessing more robust, and generally fixes a lot of bugs in preparation
28772 for calling the 0.2.0 branch stable.
28775 - Do not include recognizeable strings in the commonname part of
28776 Tor's x509 certificates.
28779 - If we're a relay, avoid picking ourselves as an introduction point,
28780 a rendezvous point, or as the final hop for internal circuits. Bug
28781 reported by taranis and lodger. Bugfix on 0.1.2.x.
28782 - Patch from "Andrew S. Lists" to catch when we contact a directory
28783 mirror at IP address X and he says we look like we're coming from
28784 IP address X. Bugfix on 0.1.2.x.
28786 o Minor features (security):
28787 - Be more paranoid about overwriting sensitive memory on free(),
28788 as a defensive programming tactic to ensure forward secrecy.
28790 o Minor features (directory authority):
28791 - Actually validate the options passed to AuthDirReject,
28792 AuthDirInvalid, AuthDirBadDir, and AuthDirBadExit.
28793 - Reject router descriptors with out-of-range bandwidthcapacity or
28794 bandwidthburst values.
28796 o Minor features (controller):
28797 - Reject controller commands over 1MB in length. This keeps rogue
28798 processes from running us out of memory.
28800 o Minor features (misc):
28801 - Give more descriptive well-formedness errors for out-of-range
28802 hidden service descriptor/protocol versions.
28803 - Make memory debugging information describe more about history
28804 of cell allocation, so we can help reduce our memory use.
28806 o Deprecated features (controller):
28807 - The status/version/num-versioning and status/version/num-concurring
28808 GETINFO options are no longer useful in the v3 directory protocol:
28809 treat them as deprecated, and warn when they're used.
28812 - When our consensus networkstatus has been expired for a while, stop
28813 being willing to build circuits using it. Fixes bug 401. Bugfix
28815 - Directory caches now fetch certificates from all authorities
28816 listed in a networkstatus consensus, even when they do not
28817 recognize them. Fixes bug 571. Bugfix on 0.2.0.x.
28818 - When connecting to a bridge without specifying its key, insert
28819 the connection into the identity-to-connection map as soon as
28820 a key is learned. Fixes bug 574. Bugfix on 0.2.0.x.
28821 - Detect versions of OS X where malloc_good_size() is present in the
28822 library but never actually declared. Resolves bug 587. Bugfix
28824 - Stop incorrectly truncating zlib responses to directory authority
28825 signature download requests. Fixes bug 593. Bugfix on 0.2.0.x.
28826 - Stop recommending that every server operator send mail to tor-ops.
28827 Resolves bug 597. Bugfix on 0.1.2.x.
28828 - Don't trigger an assert if we start a directory authority with a
28829 private IP address (like 127.0.0.1).
28830 - Avoid possible failures when generating a directory with routers
28831 with over-long versions strings, or too many flags set. Bugfix
28833 - If an attempt to launch a DNS resolve request over the control
28834 port fails because we have overrun the limit on the number of
28835 connections, tell the controller that the request has failed.
28836 - Avoid using too little bandwidth when our clock skips a few
28837 seconds. Bugfix on 0.1.2.x.
28838 - Fix shell error when warning about missing packages in configure
28839 script, on Fedora or Red Hat machines. Bugfix on 0.2.0.x.
28840 - Do not become confused when receiving a spurious VERSIONS-like
28841 cell from a confused v1 client. Bugfix on 0.2.0.x.
28842 - Re-fetch v2 (as well as v0) rendezvous descriptors when all
28843 introduction points for a hidden service have failed. Patch from
28844 Karsten Loesing. Bugfix on 0.2.0.x.
28846 o Code simplifications and refactoring:
28847 - Remove some needless generality from cpuworker code, for improved
28849 - Stop overloading the circuit_t.onionskin field for both "onionskin
28850 from a CREATE cell that we are waiting for a cpuworker to be
28851 assigned" and "onionskin from an EXTEND cell that we are going to
28852 send to an OR as soon as we are connected". Might help with bug 600.
28853 - Add an in-place version of aes_crypt() so that we can avoid doing a
28854 needless memcpy() call on each cell payload.
28857 Changes in version 0.2.0.18-alpha - 2008-01-25
28858 Tor 0.2.0.18-alpha adds a sixth v3 directory authority run by CCC,
28859 fixes a big memory leak in 0.2.0.17-alpha, and adds new config options
28860 that can warn or reject connections to ports generally associated with
28861 vulnerable-plaintext protocols.
28863 o New directory authorities:
28864 - Set up dannenberg (run by CCC) as the sixth v3 directory
28868 - Fix a major memory leak when attempting to use the v2 TLS
28869 handshake code. Bugfix on 0.2.0.x; fixes bug 589.
28870 - We accidentally enabled the under-development v2 TLS handshake
28871 code, which was causing log entries like "TLS error while
28872 renegotiating handshake". Disable it again. Resolves bug 590.
28873 - We were computing the wrong Content-Length: header for directory
28874 responses that need to be compressed on the fly, causing clients
28875 asking for those items to always fail. Bugfix on 0.2.0.x; partially
28879 - Avoid going directly to the directory authorities even if you're a
28880 relay, if you haven't found yourself reachable yet or if you've
28881 decided not to advertise your dirport yet. Addresses bug 556.
28882 - If we've gone 12 hours since our last bandwidth check, and we
28883 estimate we have less than 50KB bandwidth capacity but we could
28884 handle more, do another bandwidth test.
28885 - New config options WarnPlaintextPorts and RejectPlaintextPorts so
28886 Tor can warn and/or refuse connections to ports commonly used with
28887 vulnerable-plaintext protocols. Currently we warn on ports 23,
28888 109, 110, and 143, but we don't reject any.
28891 - When we setconf ClientOnly to 1, close any current OR and Dir
28892 listeners. Reported by mwenge.
28893 - When we get a consensus that's been signed by more people than
28894 we expect, don't log about it; it's not a big deal. Reported
28898 - Don't answer "/tor/networkstatus-bridges" directory requests if
28899 the request isn't encrypted.
28900 - Make "ClientOnly 1" config option disable directory ports too.
28901 - Patches from Karsten Loesing to make v2 hidden services more
28902 robust: work even when there aren't enough HSDir relays available;
28903 retry when a v2 rend desc fetch fails; but don't retry if we
28904 already have a usable v0 rend desc.
28907 Changes in version 0.2.0.17-alpha - 2008-01-17
28908 Tor 0.2.0.17-alpha makes the tarball build cleanly again (whoops).
28911 - Make the tor-gencert man page get included correctly in the tarball.
28914 Changes in version 0.2.0.16-alpha - 2008-01-17
28915 Tor 0.2.0.16-alpha adds a fifth v3 directory authority run by Karsten
28916 Loesing, and generally cleans up a lot of features and minor bugs.
28918 o New directory authorities:
28919 - Set up gabelmoo (run by Karsten Loesing) as the fifth v3 directory
28922 o Major performance improvements:
28923 - Switch our old ring buffer implementation for one more like that
28924 used by free Unix kernels. The wasted space in a buffer with 1mb
28925 of data will now be more like 8k than 1mb. The new implementation
28926 also avoids realloc();realloc(); patterns that can contribute to
28927 memory fragmentation.
28930 - Configuration files now accept C-style strings as values. This
28931 helps encode characters not allowed in the current configuration
28932 file format, such as newline or #. Addresses bug 557.
28933 - Although we fixed bug 539 (where servers would send HTTP status 503
28934 responses _and_ send a body too), there are still servers out
28935 there that haven't upgraded. Therefore, make clients parse such
28936 bodies when they receive them.
28937 - When we're not serving v2 directory information, there is no reason
28938 to actually keep any around. Remove the obsolete files and directory
28939 on startup if they are very old and we aren't going to serve them.
28941 o Minor performance improvements:
28942 - Reference-count and share copies of address policy entries; only 5%
28943 of them were actually distinct.
28944 - Never walk through the list of logs if we know that no log is
28945 interested in a given message.
28948 - When an authority has not signed a consensus, do not try to
28949 download a nonexistent "certificate with key 00000000". Bugfix
28950 on 0.2.0.x. Fixes bug 569.
28951 - Fix a rare assert error when we're closing one of our threads:
28952 use a mutex to protect the list of logs, so we never write to the
28953 list as it's being freed. Bugfix on 0.1.2.x. Fixes the very rare
28954 bug 575, which is kind of the revenge of bug 222.
28955 - Patch from Karsten Loesing to complain less at both the client
28956 and the relay when a relay used to have the HSDir flag but doesn't
28957 anymore, and we try to upload a hidden service descriptor.
28958 - Stop leaking one cert per TLS context. Fixes bug 582. Bugfix on
28960 - Do not try to download missing certificates until we have tried
28961 to check our fallback consensus. Fixes bug 583.
28962 - Make bridges round reported GeoIP stats info up to the nearest
28963 estimate, not down. Now we can distinguish between "0 people from
28964 this country" and "1 person from this country".
28965 - Avoid a spurious free on base64 failure. Bugfix on 0.1.2.
28966 - Avoid possible segfault if key generation fails in
28967 crypto_pk_hybrid_encrypt. Bugfix on 0.2.0.
28968 - Avoid segfault in the case where a badly behaved v2 versioning
28969 directory sends a signed networkstatus with missing client-versions.
28971 - Avoid segfaults on certain complex invocations of
28972 router_get_by_hexdigest(). Bugfix on 0.1.2.
28973 - Correct bad index on array access in parse_http_time(). Bugfix
28975 - Fix possible bug in vote generation when server versions are present
28976 but client versions are not.
28977 - Fix rare bug on REDIRECTSTREAM control command when called with no
28978 port set: it could erroneously report an error when none had
28980 - Avoid bogus crash-prone, leak-prone tor_realloc when we're
28981 compressing large objects and find ourselves with more than 4k
28982 left over. Bugfix on 0.2.0.
28983 - Fix a small memory leak when setting up a hidden service.
28984 - Fix a few memory leaks that could in theory happen under bizarre
28986 - Fix an assert if we post a general-purpose descriptor via the
28987 control port but that descriptor isn't mentioned in our current
28988 network consensus. Bug reported by Jon McLachlan; bugfix on
28991 o Minor features (controller):
28992 - Get NS events working again. Patch from tup.
28993 - The GETCONF command now escapes and quotes configuration values
28994 that don't otherwise fit into the torrc file.
28995 - The SETCONF command now handles quoted values correctly.
28997 o Minor features (directory authorities):
28998 - New configuration options to override default maximum number of
28999 servers allowed on a single IP address. This is important for
29000 running a test network on a single host.
29001 - Actually implement the -s option to tor-gencert.
29002 - Add a manual page for tor-gencert.
29004 o Minor features (bridges):
29005 - Bridge authorities no longer serve bridge descriptors over
29006 unencrypted connections.
29008 o Minor features (other):
29009 - Add hidden services and DNSPorts to the list of things that make
29010 Tor accept that it has running ports. Change starting Tor with no
29011 ports from a fatal error to a warning; we might change it back if
29012 this turns out to confuse anybody. Fixes bug 579.
29015 Changes in version 0.1.2.19 - 2008-01-17
29016 Tor 0.1.2.19 fixes a huge memory leak on exit relays, makes the default
29017 exit policy a little bit more conservative so it's safer to run an
29018 exit relay on a home system, and fixes a variety of smaller issues.
29021 - Exit policies now reject connections that are addressed to a
29022 relay's public (external) IP address too, unless
29023 ExitPolicyRejectPrivate is turned off. We do this because too
29024 many relays are running nearby to services that trust them based
29025 on network address.
29028 - When the clock jumps forward a lot, do not allow the bandwidth
29029 buckets to become negative. Fixes bug 544.
29030 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
29031 on every successful resolve. Reported by Mike Perry.
29032 - Purge old entries from the "rephist" database and the hidden
29033 service descriptor database even when DirPort is zero.
29034 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
29035 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
29036 crashing or mis-answering these requests.
29037 - When we decide to send a 503 response to a request for servers, do
29038 not then also send the server descriptors: this defeats the whole
29039 purpose. Fixes bug 539.
29042 - Changing the ExitPolicyRejectPrivate setting should cause us to
29043 rebuild our server descriptor.
29044 - Fix handling of hex nicknames when answering controller requests for
29045 networkstatus by name, or when deciding whether to warn about
29046 unknown routers in a config option. (Patch from mwenge.)
29047 - Fix a couple of hard-to-trigger autoconf problems that could result
29048 in really weird results on platforms whose sys/types.h files define
29049 nonstandard integer types.
29050 - Don't try to create the datadir when running --verify-config or
29051 --hash-password. Resolves bug 540.
29052 - If we were having problems getting a particular descriptor from the
29053 directory caches, and then we learned about a new descriptor for
29054 that router, we weren't resetting our failure count. Reported
29056 - Although we fixed bug 539 (where servers would send HTTP status 503
29057 responses _and_ send a body too), there are still servers out there
29058 that haven't upgraded. Therefore, make clients parse such bodies
29059 when they receive them.
29060 - Run correctly on systems where rlim_t is larger than unsigned long.
29061 This includes some 64-bit systems.
29062 - Run correctly on platforms (like some versions of OS X 10.5) where
29063 the real limit for number of open files is OPEN_FILES, not rlim_max
29064 from getrlimit(RLIMIT_NOFILES).
29065 - Avoid a spurious free on base64 failure.
29066 - Avoid segfaults on certain complex invocations of
29067 router_get_by_hexdigest().
29068 - Fix rare bug on REDIRECTSTREAM control command when called with no
29069 port set: it could erroneously report an error when none had
29073 Changes in version 0.2.0.15-alpha - 2007-12-25
29074 Tor 0.2.0.14-alpha and 0.2.0.15-alpha fix a bunch of bugs with the
29075 features added in 0.2.0.13-alpha.
29078 - Fix several remotely triggerable asserts based on DirPort requests
29079 for a v2 or v3 networkstatus object before we were prepared. This
29080 was particularly bad for 0.2.0.13 and later bridge relays, who
29081 would never have a v2 networkstatus and would thus always crash
29082 when used. Bugfixes on 0.2.0.x.
29083 - Estimate the v3 networkstatus size more accurately, rather than
29084 estimating it at zero bytes and giving it artificially high priority
29085 compared to other directory requests. Bugfix on 0.2.0.x.
29088 - Fix configure.in logic for cross-compilation.
29089 - When we load a bridge descriptor from the cache, and it was
29090 previously unreachable, mark it as retriable so we won't just
29091 ignore it. Also, try fetching a new copy immediately. Bugfixes
29093 - The bridge GeoIP stats were counting other relays, for example
29094 self-reachability and authority-reachability tests.
29097 - Support compilation to target iPhone; patch from cjacker huang.
29098 To build for iPhone, pass the --enable-iphone option to configure.
29101 Changes in version 0.2.0.14-alpha - 2007-12-23
29103 - Fix a crash on startup if you install Tor 0.2.0.13-alpha fresh
29104 without a datadirectory from a previous Tor install. Reported
29106 - Fix a crash when we fetch a descriptor that turns out to be
29107 unexpected (it used to be in our networkstatus when we started
29108 fetching it, but it isn't in our current networkstatus), and we
29109 aren't using bridges. Bugfix on 0.2.0.x.
29110 - Fix a crash when accessing hidden services: it would work the first
29111 time you use a given introduction point for your service, but
29112 on subsequent requests we'd be using garbage memory. Fixed by
29113 Karsten Loesing. Bugfix on 0.2.0.13-alpha.
29114 - Fix a crash when we load a bridge descriptor from disk but we don't
29115 currently have a Bridge line for it in our torrc. Bugfix on
29119 - If bridge authorities set BridgePassword, they will serve a
29120 snapshot of known bridge routerstatuses from their DirPort to
29121 anybody who knows that password. Unset by default.
29124 - Make the unit tests build again.
29125 - Make "GETINFO/desc-annotations/id/<OR digest>" actually work.
29126 - Make PublishServerDescriptor default to 1, so the default doesn't
29127 have to change as we invent new directory protocol versions.
29128 - Fix test for rlim_t on OSX 10.3: sys/resource.h doesn't want to
29129 be included unless sys/time.h is already included. Fixes
29130 bug 553. Bugfix on 0.2.0.x.
29131 - If we receive a general-purpose descriptor and then receive an
29132 identical bridge-purpose descriptor soon after, don't discard
29133 the next one as a duplicate.
29136 - If BridgeRelay is set to 1, then the default for
29137 PublishServerDescriptor is now "bridge" rather than "v2,v3".
29138 - If the user sets RelayBandwidthRate but doesn't set
29139 RelayBandwidthBurst, then make them equal rather than erroring out.
29142 Changes in version 0.2.0.13-alpha - 2007-12-21
29143 Tor 0.2.0.13-alpha adds a fourth v3 directory authority run by Geoff
29144 Goodell, fixes many more bugs, and adds a lot of infrastructure for
29147 o New directory authorities:
29148 - Set up lefkada (run by Geoff Goodell) as the fourth v3 directory
29152 - Only update guard status (usable / not usable) once we have
29153 enough directory information. This was causing us to always pick
29154 two new guards on startup (bugfix on 0.2.0.9-alpha), and it was
29155 causing us to discard all our guards on startup if we hadn't been
29156 running for a few weeks (bugfix on 0.1.2.x). Fixes bug 448.
29157 - Purge old entries from the "rephist" database and the hidden
29158 service descriptor databases even when DirPort is zero. Bugfix
29160 - We were ignoring our RelayBandwidthRate for the first 30 seconds
29161 after opening a circuit -- even a relayed circuit. Bugfix on
29163 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
29164 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
29165 crashing or mis-answering these types of requests.
29166 - Relays were publishing their server descriptor to v1 and v2
29167 directory authorities, but they didn't try publishing to v3-only
29168 authorities. Fix this; and also stop publishing to v1 authorities.
29170 - When we were reading router descriptors from cache, we were ignoring
29171 the annotations -- so for example we were reading in bridge-purpose
29172 descriptors as general-purpose descriptors. Bugfix on 0.2.0.8-alpha.
29173 - When we decided to send a 503 response to a request for servers, we
29174 were then also sending the server descriptors: this defeats the
29175 whole purpose. Fixes bug 539; bugfix on 0.1.2.x.
29178 - Bridge relays now behave like clients with respect to time
29179 intervals for downloading new consensus documents -- otherwise they
29180 stand out. Bridge users now wait until the end of the interval,
29181 so their bridge relay will be sure to have a new consensus document.
29182 - Three new config options (AlternateDirAuthority,
29183 AlternateBridgeAuthority, and AlternateHSAuthority) that let the
29184 user selectively replace the default directory authorities by type,
29185 rather than the all-or-nothing replacement that DirServer offers.
29186 - Tor can now be configured to read a GeoIP file from disk in one
29187 of two formats. This can be used by controllers to map IP addresses
29188 to countries. Eventually, it may support exit-by-country.
29189 - When possible, bridge relays remember which countries users
29190 are coming from, and report aggregate information in their
29191 extra-info documents, so that the bridge authorities can learn
29192 where Tor is blocked.
29193 - Bridge directory authorities now do reachability testing on the
29194 bridges they know. They provide router status summaries to the
29195 controller via "getinfo ns/purpose/bridge", and also dump summaries
29196 to a file periodically.
29197 - Stop fetching directory info so aggressively if your DirPort is
29198 on but your ORPort is off; stop fetching v2 dir info entirely.
29199 You can override these choices with the new FetchDirInfoEarly
29203 - The fix in 0.2.0.12-alpha cleared the "hsdir" flag in v3 network
29204 consensus documents when there are too many relays at a single
29205 IP address. Now clear it in v2 network status documents too, and
29206 also clear it in routerinfo_t when the relay is no longer listed
29207 in the relevant networkstatus document.
29208 - Don't crash if we get an unexpected value for the
29209 PublishServerDescriptor config option. Reported by Matt Edman;
29210 bugfix on 0.2.0.9-alpha.
29211 - Our new v2 hidden service descriptor format allows descriptors
29212 that have no introduction points. But Tor crashed when we tried
29213 to build a descriptor with no intro points (and it would have
29214 crashed if we had tried to parse one). Bugfix on 0.2.0.x; patch
29215 by Karsten Loesing.
29216 - Fix building with dmalloc 5.5.2 with glibc.
29217 - Reject uploaded descriptors and extrainfo documents if they're
29218 huge. Otherwise we'll cache them all over the network and it'll
29219 clog everything up. Reported by Aljosha Judmayer.
29220 - Check for presence of s6_addr16 and s6_addr32 fields in in6_addr
29221 via autoconf. Should fix compile on solaris. Bugfix on 0.2.0.x.
29222 - When the DANGEROUS_VERSION controller status event told us we're
29223 running an obsolete version, it used the string "OLD" to describe
29224 it. Yet the "getinfo" interface used the string "OBSOLETE". Now use
29225 "OBSOLETE" in both cases. Bugfix on 0.1.2.x.
29226 - If we can't expand our list of entry guards (e.g. because we're
29227 using bridges or we have StrictEntryNodes set), don't mark relays
29228 down when they fail a directory request. Otherwise we're too quick
29229 to mark all our entry points down. Bugfix on 0.1.2.x.
29230 - Fix handling of hex nicknames when answering controller requests for
29231 networkstatus by name, or when deciding whether to warn about unknown
29232 routers in a config option. Bugfix on 0.1.2.x. (Patch from mwenge.)
29233 - Fix a couple of hard-to-trigger autoconf problems that could result
29234 in really weird results on platforms whose sys/types.h files define
29235 nonstandard integer types. Bugfix on 0.1.2.x.
29236 - Fix compilation with --disable-threads set. Bugfix on 0.2.0.x.
29237 - Don't crash on name lookup when we have no current consensus. Fixes
29238 bug 538; bugfix on 0.2.0.x.
29239 - Only Tors that want to mirror the v2 directory info should
29240 create the "cached-status" directory in their datadir. (All Tors
29241 used to create it.) Bugfix on 0.2.0.9-alpha.
29242 - Directory authorities should only automatically download Extra Info
29243 documents if they're v1, v2, or v3 authorities. Bugfix on 0.1.2.x.
29246 - On the USR1 signal, when dmalloc is in use, log the top 10 memory
29247 consumers. (We already do this on HUP.)
29248 - Authorities and caches fetch the v2 networkstatus documents
29249 less often, now that v3 is encouraged.
29250 - Add a new config option BridgeRelay that specifies you want to
29251 be a bridge relay. Right now the only difference is that it makes
29252 you answer begin_dir requests, and it makes you cache dir info,
29253 even if your DirPort isn't on.
29254 - Add "GETINFO/desc-annotations/id/<OR digest>" so controllers can
29255 ask about source, timestamp of arrival, purpose, etc. We need
29256 something like this to help Vidalia not do GeoIP lookups on bridge
29258 - Allow multiple HashedControlPassword config lines, to support
29259 multiple controller passwords.
29260 - Authorities now decide whether they're authoritative for a given
29261 router based on the router's purpose.
29262 - New config options AuthDirBadDir and AuthDirListBadDirs for
29263 authorities to mark certain relays as "bad directories" in the
29264 networkstatus documents. Also supports the "!baddir" directive in
29265 the approved-routers file.
29268 Changes in version 0.2.0.12-alpha - 2007-11-16
29269 This twelfth development snapshot fixes some more build problems as
29270 well as a few minor bugs.
29273 - Make it build on OpenBSD again. Patch from tup.
29274 - Substitute BINDIR and LOCALSTATEDIR in scripts. Fixes
29275 package-building for Red Hat, OS X, etc.
29277 o Minor bugfixes (on 0.1.2.x):
29278 - Changing the ExitPolicyRejectPrivate setting should cause us to
29279 rebuild our server descriptor.
29281 o Minor bugfixes (on 0.2.0.x):
29282 - When we're lacking a consensus, don't try to perform rendezvous
29283 operations. Reported by Karsten Loesing.
29284 - Fix a small memory leak whenever we decide against using a
29285 newly picked entry guard. Reported by Mike Perry.
29286 - When authorities detected more than two relays running on the same
29287 IP address, they were clearing all the status flags but forgetting
29288 to clear the "hsdir" flag. So clients were being told that a
29289 given relay was the right choice for a v2 hsdir lookup, yet they
29290 never had its descriptor because it was marked as 'not running'
29292 - If we're trying to fetch a bridge descriptor and there's no way
29293 the bridge authority could help us (for example, we don't know
29294 a digest, or there is no bridge authority), don't be so eager to
29295 fall back to asking the bridge authority.
29296 - If we're using bridges or have strictentrynodes set, and our
29297 chosen exit is in the same family as all our bridges/entry guards,
29298 then be flexible about families.
29301 - When we negotiate a v2 link-layer connection (not yet implemented),
29302 accept RELAY_EARLY cells and turn them into RELAY cells if we've
29303 negotiated a v1 connection for their next step. Initial code for
29307 Changes in version 0.2.0.11-alpha - 2007-11-12
29308 This eleventh development snapshot fixes some build problems with
29309 the previous snapshot. It also includes a more secure-by-default exit
29310 policy for relays, fixes an enormous memory leak for exit relays, and
29311 fixes another bug where servers were falling out of the directory list.
29314 - Exit policies now reject connections that are addressed to a
29315 relay's public (external) IP address too, unless
29316 ExitPolicyRejectPrivate is turned off. We do this because too
29317 many relays are running nearby to services that trust them based
29318 on network address. Bugfix on 0.1.2.x.
29321 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
29322 on every successful resolve. Reported by Mike Perry; bugfix
29324 - On authorities, never downgrade to old router descriptors simply
29325 because they're listed in the consensus. This created a catch-22
29326 where we wouldn't list a new descriptor because there was an
29327 old one in the consensus, and we couldn't get the new one in the
29328 consensus because we wouldn't list it. Possible fix for bug 548.
29329 Also, this might cause bug 543 to appear on authorities; if so,
29330 we'll need a band-aid for that. Bugfix on 0.2.0.9-alpha.
29332 o Packaging fixes on 0.2.0.10-alpha:
29333 - We were including instructions about what to do with the
29334 src/config/fallback-consensus file, but we weren't actually
29335 including it in the tarball. Disable all of that for now.
29338 - Allow people to say PreferTunnelledDirConns rather than
29339 PreferTunneledDirConns, for those alternate-spellers out there.
29342 - Don't reevaluate all the information from our consensus document
29343 just because we've downloaded a v2 networkstatus that we intend
29344 to cache. Fixes bug 545; bugfix on 0.2.0.x.
29347 Changes in version 0.2.0.10-alpha - 2007-11-10
29348 This tenth development snapshot adds a third v3 directory authority
29349 run by Mike Perry, adds most of Karsten Loesing's new hidden service
29350 descriptor format, fixes a bad crash bug and new bridge bugs introduced
29351 in 0.2.0.9-alpha, fixes many bugs with the v3 directory implementation,
29352 fixes some minor memory leaks in previous 0.2.0.x snapshots, and
29353 addresses many more minor issues.
29355 o New directory authorities:
29356 - Set up ides (run by Mike Perry) as the third v3 directory authority.
29359 - Allow tunnelled directory connections to ask for an encrypted
29360 "begin_dir" connection or an anonymized "uses a full Tor circuit"
29361 connection independently. Now we can make anonymized begin_dir
29362 connections for (e.g.) more secure hidden service posting and
29364 - More progress on proposal 114: code from Karsten Loesing to
29365 implement new hidden service descriptor format.
29366 - Raise the default BandwidthRate/BandwidthBurst to 5MB/10MB, to
29367 accommodate the growing number of servers that use the default
29368 and are reaching it.
29369 - Directory authorities use a new formula for selecting which nodes
29370 to advertise as Guards: they must be in the top 7/8 in terms of
29371 how long we have known about them, and above the median of those
29372 nodes in terms of weighted fractional uptime.
29373 - Make "not enough dir info yet" warnings describe *why* Tor feels
29374 it doesn't have enough directory info yet.
29377 - Stop servers from crashing if they set a Family option (or
29378 maybe in other situations too). Bugfix on 0.2.0.9-alpha; reported
29380 - Make bridge users work again -- the move to v3 directories in
29381 0.2.0.9-alpha had introduced a number of bugs that made bridges
29382 no longer work for clients.
29383 - When the clock jumps forward a lot, do not allow the bandwidth
29384 buckets to become negative. Bugfix on 0.1.2.x; fixes bug 544.
29386 o Major bugfixes (v3 dir, bugfixes on 0.2.0.9-alpha):
29387 - When the consensus lists a router descriptor that we previously were
29388 mirroring, but that we considered non-canonical, reload the
29389 descriptor as canonical. This fixes bug 543 where Tor servers
29390 would start complaining after a few days that they don't have
29391 enough directory information to build a circuit.
29392 - Consider replacing the current consensus when certificates arrive
29393 that make the pending consensus valid. Previously, we were only
29394 considering replacement when the new certs _didn't_ help.
29395 - Fix an assert error on startup if we didn't already have the
29396 consensus and certs cached in our datadirectory: we were caching
29397 the consensus in consensus_waiting_for_certs but then free'ing it
29399 - Avoid sending a request for "keys/fp" (for which we'll get a 400 Bad
29400 Request) if we need more v3 certs but we've already got pending
29401 requests for all of them.
29402 - Correctly back off from failing certificate downloads. Fixes
29404 - Authorities don't vote on the Running flag if they have been running
29405 for less than 30 minutes themselves. Fixes bug 547, where a newly
29406 started authority would vote that everyone was down.
29408 o New requirements:
29409 - Drop support for OpenSSL version 0.9.6. Just about nobody was using
29410 it, it had no AES, and it hasn't seen any security patches since
29414 - Clients now hold circuitless TLS connections open for 1.5 times
29415 MaxCircuitDirtiness (15 minutes), since it is likely that they'll
29416 rebuild a new circuit over them within that timeframe. Previously,
29417 they held them open only for KeepalivePeriod (5 minutes).
29418 - Use "If-Modified-Since" to avoid retrieving consensus
29419 networkstatuses that we already have.
29420 - When we have no consensus, check FallbackNetworkstatusFile (defaults
29421 to $PREFIX/share/tor/fallback-consensus) for a consensus. This way
29422 we start knowing some directory caches.
29423 - When we receive a consensus from the future, warn about skew.
29424 - Improve skew reporting: try to give the user a better log message
29425 about how skewed they are, and how much this matters.
29426 - When we have a certificate for an authority, believe that
29427 certificate's claims about the authority's IP address.
29428 - New --quiet command-line option to suppress the default console log.
29429 Good in combination with --hash-password.
29430 - Authorities send back an X-Descriptor-Not-New header in response to
29431 an accepted-but-discarded descriptor upload. Partially implements
29433 - Make the log message for "tls error. breaking." more useful.
29434 - Better log messages about certificate downloads, to attempt to
29435 track down the second incarnation of bug 546.
29437 o Minor features (bridges):
29438 - If bridge users set UpdateBridgesFromAuthority, but the digest
29439 they ask for is a 404 from the bridge authority, they now fall
29440 back to trying the bridge directly.
29441 - Bridges now use begin_dir to publish their server descriptor to
29442 the bridge authority, even when they haven't set TunnelDirConns.
29444 o Minor features (controller):
29445 - When reporting clock skew, and we know that the clock is _at least
29446 as skewed_ as some value, but we don't know the actual value,
29447 report the value as a "minimum skew."
29450 - Update linux-tor-prio.sh script to allow QoS based on the uid of
29451 the Tor process. Patch from Marco Bonetti with tweaks from Mike
29455 - Refuse to start if both ORPort and UseBridges are set. Bugfix
29456 on 0.2.0.x, suggested by Matt Edman.
29457 - Don't stop fetching descriptors when FetchUselessDescriptors is
29458 set, even if we stop asking for circuits. Bugfix on 0.1.2.x;
29459 reported by tup and ioerror.
29460 - Better log message on vote from unknown authority.
29461 - Don't log "Launching 0 request for 0 router" message.
29463 o Minor bugfixes (memory leaks):
29464 - Stop leaking memory every time we parse a v3 certificate. Bugfix
29466 - Stop leaking memory every time we load a v3 certificate. Bugfix
29467 on 0.2.0.1-alpha. Fixes bug 536.
29468 - Stop leaking a cached networkstatus on exit. Bugfix on
29470 - Stop leaking voter information every time we free a consensus.
29471 Bugfix on 0.2.0.3-alpha.
29472 - Stop leaking signed data every time we check a voter signature.
29473 Bugfix on 0.2.0.3-alpha.
29474 - Stop leaking a signature every time we fail to parse a consensus or
29475 a vote. Bugfix on 0.2.0.3-alpha.
29476 - Stop leaking v2_download_status_map on shutdown. Bugfix on
29478 - Stop leaking conn->nickname every time we make a connection to a
29479 Tor relay without knowing its expected identity digest (e.g. when
29480 using bridges). Bugfix on 0.2.0.3-alpha.
29482 - Minor bugfixes (portability):
29483 - Run correctly on platforms where rlim_t is larger than unsigned
29484 long, and/or where the real limit for number of open files is
29485 OPEN_FILES, not rlim_max from getrlimit(RLIMIT_NOFILES). In
29486 particular, these may be needed for OS X 10.5.
29489 Changes in version 0.1.2.18 - 2007-10-28
29490 Tor 0.1.2.18 fixes many problems including crash bugs, problems with
29491 hidden service introduction that were causing huge delays, and a big
29492 bug that was causing some servers to disappear from the network status
29493 lists for a few hours each day.
29495 o Major bugfixes (crashes):
29496 - If a connection is shut down abruptly because of something that
29497 happened inside connection_flushed_some(), do not call
29498 connection_finished_flushing(). Should fix bug 451:
29499 "connection_stop_writing: Assertion conn->write_event failed"
29500 Bugfix on 0.1.2.7-alpha.
29501 - Fix possible segfaults in functions called from
29502 rend_process_relay_cell().
29504 o Major bugfixes (hidden services):
29505 - Hidden services were choosing introduction points uniquely by
29506 hexdigest, but when constructing the hidden service descriptor
29507 they merely wrote the (potentially ambiguous) nickname.
29508 - Clients now use the v2 intro format for hidden service
29509 connections: they specify their chosen rendezvous point by identity
29510 digest rather than by (potentially ambiguous) nickname. These
29511 changes could speed up hidden service connections dramatically.
29513 o Major bugfixes (other):
29514 - Stop publishing a new server descriptor just because we get a
29515 HUP signal. This led (in a roundabout way) to some servers getting
29516 dropped from the networkstatus lists for a few hours each day.
29517 - When looking for a circuit to cannibalize, consider family as well
29518 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
29519 circuit cannibalization).
29520 - When a router wasn't listed in a new networkstatus, we were leaving
29521 the flags for that router alone -- meaning it remained Named,
29522 Running, etc -- even though absence from the networkstatus means
29523 that it shouldn't be considered to exist at all anymore. Now we
29524 clear all the flags for routers that fall out of the networkstatus
29525 consensus. Fixes bug 529.
29528 - Don't try to access (or alter) the state file when running
29529 --list-fingerprint or --verify-config or --hash-password. Resolves
29531 - When generating information telling us how to extend to a given
29532 router, do not try to include the nickname if it is
29533 absent. Resolves bug 467.
29534 - Fix a user-triggerable segfault in expand_filename(). (There isn't
29535 a way to trigger this remotely.)
29536 - When sending a status event to the controller telling it that an
29537 OR address is reachable, set the port correctly. (Previously we
29538 were reporting the dir port.)
29539 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
29540 command. Bugfix on 0.1.2.17.
29541 - When loading bandwidth history, do not believe any information in
29542 the future. Fixes bug 434.
29543 - When loading entry guard information, do not believe any information
29545 - When we have our clock set far in the future and generate an
29546 onion key, then re-set our clock to be correct, we should not stop
29547 the onion key from getting rotated.
29548 - On some platforms, accept() can return a broken address. Detect
29549 this more quietly, and deal accordingly. Fixes bug 483.
29550 - It's not actually an error to find a non-pending entry in the DNS
29551 cache when canceling a pending resolve. Don't log unless stuff
29552 is fishy. Resolves bug 463.
29553 - Don't reset trusted dir server list when we set a configuration
29554 option. Patch from Robert Hogan.
29555 - Don't try to create the datadir when running --verify-config or
29556 --hash-password. Resolves bug 540.
29559 Changes in version 0.2.0.9-alpha - 2007-10-24
29560 This ninth development snapshot switches clients to the new v3 directory
29561 system; allows servers to be listed in the network status even when they
29562 have the same nickname as a registered server; and fixes many other
29563 bugs including a big one that was causing some servers to disappear
29564 from the network status lists for a few hours each day.
29566 o Major features (directory system):
29567 - Clients now download v3 consensus networkstatus documents instead
29568 of v2 networkstatus documents. Clients and caches now base their
29569 opinions about routers on these consensus documents. Clients only
29570 download router descriptors listed in the consensus.
29571 - Authorities now list servers who have the same nickname as
29572 a different named server, but list them with a new flag,
29573 "Unnamed". Now we can list servers that happen to pick the same
29574 nickname as a server that registered two years ago and then
29575 disappeared. Partially implements proposal 122.
29576 - If the consensus lists a router as "Unnamed", the name is assigned
29577 to a different router: do not identify the router by that name.
29578 Partially implements proposal 122.
29579 - Authorities can now come to a consensus on which method to use to
29580 compute the consensus. This gives us forward compatibility.
29583 - Stop publishing a new server descriptor just because we HUP or
29584 when we find our DirPort to be reachable but won't actually publish
29585 it. New descriptors without any real changes are dropped by the
29586 authorities, and can screw up our "publish every 18 hours" schedule.
29588 - When a router wasn't listed in a new networkstatus, we were leaving
29589 the flags for that router alone -- meaning it remained Named,
29590 Running, etc -- even though absence from the networkstatus means
29591 that it shouldn't be considered to exist at all anymore. Now we
29592 clear all the flags for routers that fall out of the networkstatus
29593 consensus. Fixes bug 529; bugfix on 0.1.2.x.
29594 - Fix awful behavior in DownloadExtraInfo option where we'd fetch
29595 extrainfo documents and then discard them immediately for not
29596 matching the latest router. Bugfix on 0.2.0.1-alpha.
29598 o Minor features (v3 directory protocol):
29599 - Allow tor-gencert to generate a new certificate without replacing
29601 - Allow certificates to include an address.
29602 - When we change our directory-cache settings, reschedule all voting
29603 and download operations.
29604 - Reattempt certificate downloads immediately on failure, as long as
29605 we haven't failed a threshold number of times yet.
29606 - Delay retrying consensus downloads while we're downloading
29607 certificates to verify the one we just got. Also, count getting a
29608 consensus that we already have (or one that isn't valid) as a failure,
29609 and count failing to get the certificates after 20 minutes as a
29611 - Build circuits and download descriptors even if our consensus is a
29612 little expired. (This feature will go away once authorities are
29615 o Minor features (router descriptor cache):
29616 - If we find a cached-routers file that's been sitting around for more
29617 than 28 days unmodified, then most likely it's a leftover from
29618 when we upgraded to 0.2.0.8-alpha. Remove it. It has no good
29620 - When we (as a cache) download a descriptor because it was listed
29621 in a consensus, remember when the consensus was supposed to expire,
29622 and don't expire the descriptor until then.
29624 o Minor features (performance):
29625 - Call routerlist_remove_old_routers() much less often. This should
29626 speed startup, especially on directory caches.
29627 - Don't try to launch new descriptor downloads quite so often when we
29628 already have enough directory information to build circuits.
29629 - Base64 decoding was actually showing up on our profile when parsing
29630 the initial descriptor file; switch to an in-process all-at-once
29631 implementation that's about 3.5x times faster than calling out to
29634 o Minor features (compilation):
29635 - Detect non-ASCII platforms (if any still exist) and refuse to
29636 build there: some of our code assumes that 'A' is 65 and so on.
29638 o Minor bugfixes (v3 directory authorities, bugfixes on 0.2.0.x):
29639 - Make the "next period" votes into "current period" votes immediately
29640 after publishing the consensus; avoid a heisenbug that made them
29641 stick around indefinitely.
29642 - When we discard a vote as a duplicate, do not report this as
29644 - Treat missing v3 keys or certificates as an error when running as a
29645 v3 directory authority.
29646 - When we're configured to be a v3 authority, but we're only listed
29647 as a non-v3 authority in our DirServer line for ourself, correct
29649 - If an authority doesn't have a qualified hostname, just put
29650 its address in the vote. This fixes the problem where we referred to
29651 "moria on moria:9031."
29652 - Distinguish between detached signatures for the wrong period, and
29653 detached signatures for a divergent vote.
29654 - Fix a small memory leak when computing a consensus.
29655 - When there's no consensus, we were forming a vote every 30
29656 minutes, but writing the "valid-after" line in our vote based
29657 on our configured V3AuthVotingInterval: so unless the intervals
29658 matched up, we immediately rejected our own vote because it didn't
29659 start at the voting interval that caused us to construct a vote.
29661 o Minor bugfixes (v3 directory protocol, bugfixes on 0.2.0.x):
29662 - Delete unverified-consensus when the real consensus is set.
29663 - Consider retrying a consensus networkstatus fetch immediately
29664 after one fails: don't wait 60 seconds to notice.
29665 - When fetching a consensus as a cache, wait until a newer consensus
29666 should exist before trying to replace the current one.
29667 - Use a more forgiving schedule for retrying failed consensus
29668 downloads than for other types.
29670 o Minor bugfixes (other directory issues):
29671 - Correct the implementation of "download votes by digest." Bugfix on
29673 - Authorities no longer send back "400 you're unreachable please fix
29674 it" errors to Tor servers that aren't online all the time. We're
29675 supposed to tolerate these servers now. Bugfix on 0.1.2.x.
29677 o Minor bugfixes (controller):
29678 - Don't reset trusted dir server list when we set a configuration
29679 option. Patch from Robert Hogan; bugfix on 0.1.2.x.
29680 - Respond to INT and TERM SIGNAL commands before we execute the
29681 signal, in case the signal shuts us down. We had a patch in
29682 0.1.2.1-alpha that tried to do this by queueing the response on
29683 the connection's buffer before shutting down, but that really
29684 isn't the same thing at all. Bug located by Matt Edman.
29686 o Minor bugfixes (misc):
29687 - Correctly check for bad options to the "PublishServerDescriptor"
29688 config option. Bugfix on 0.2.0.1-alpha; reported by Matt Edman.
29689 - Stop leaking memory on failing case of base32_decode, and make
29690 it accept upper-case letters. Bugfixes on 0.2.0.7-alpha.
29691 - Don't try to download extrainfo documents when we're trying to
29692 fetch enough directory info to build a circuit: having enough
29693 info should get priority. Bugfix on 0.2.0.x.
29694 - Don't complain that "your server has not managed to confirm that its
29695 ports are reachable" if we haven't been able to build any circuits
29696 yet. Bug found by spending four hours without a v3 consensus. Bugfix
29698 - Detect the reason for failing to mmap a descriptor file we just
29699 wrote, and give a more useful log message. Fixes bug 533. Bugfix
29702 o Code simplifications and refactoring:
29703 - Remove support for the old bw_accounting file: we've been storing
29704 bandwidth accounting information in the state file since
29705 0.1.2.5-alpha. This may result in bandwidth accounting errors
29706 if you try to upgrade from 0.1.1.x or earlier, or if you try to
29707 downgrade to 0.1.1.x or earlier.
29708 - New convenience code to locate a file within the DataDirectory.
29709 - Move non-authority functionality out of dirvote.c.
29710 - Refactor the arguments for router_pick_{directory_|trusteddir}server
29711 so that they all take the same named flags.
29714 - Include the "tor-ctrl.sh" bash script by Stefan Behte to provide
29715 Unix users an easy way to script their Tor process (e.g. by
29716 adjusting bandwidth based on the time of the day).
29719 Changes in version 0.2.0.8-alpha - 2007-10-12
29720 This eighth development snapshot fixes a crash bug that's been bothering
29721 us since February 2007, lets bridge authorities store a list of bridge
29722 descriptors they've seen, gets v3 directory voting closer to working,
29723 starts caching v3 directory consensus documents on directory mirrors,
29724 and fixes a variety of smaller issues including some minor memory leaks.
29726 o Major features (router descriptor cache):
29727 - Store routers in a file called cached-descriptors instead of in
29728 cached-routers. Initialize cached-descriptors from cached-routers
29729 if the old format is around. The new format allows us to store
29730 annotations along with descriptors.
29731 - Use annotations to record the time we received each descriptor, its
29732 source, and its purpose.
29733 - Disable the SETROUTERPURPOSE controller command: it is now
29735 - Controllers should now specify cache=no or cache=yes when using
29736 the +POSTDESCRIPTOR command.
29737 - Bridge authorities now write bridge descriptors to disk, meaning
29738 we can export them to other programs and begin distributing them
29741 o Major features (directory authorities):
29742 - When a v3 authority is missing votes or signatures, it now tries
29744 - Directory authorities track weighted fractional uptime as well as
29745 weighted mean-time-between failures. WFU is suitable for deciding
29746 whether a node is "usually up", while MTBF is suitable for deciding
29747 whether a node is "likely to stay up." We need both, because
29748 "usually up" is a good requirement for guards, while "likely to
29749 stay up" is a good requirement for long-lived connections.
29751 o Major features (v3 directory system):
29752 - Caches now download v3 network status documents as needed,
29753 and download the descriptors listed in them.
29754 - All hosts now attempt to download and keep fresh v3 authority
29755 certificates, and re-attempt after failures.
29756 - More internal-consistency checks for vote parsing.
29758 o Major bugfixes (crashes):
29759 - If a connection is shut down abruptly because of something that
29760 happened inside connection_flushed_some(), do not call
29761 connection_finished_flushing(). Should fix bug 451. Bugfix on
29764 o Major bugfixes (performance):
29765 - Fix really bad O(n^2) performance when parsing a long list of
29766 routers: Instead of searching the entire list for an "extra-info "
29767 string which usually wasn't there, once for every routerinfo
29768 we read, just scan lines forward until we find one we like.
29770 - When we add data to a write buffer in response to the data on that
29771 write buffer getting low because of a flush, do not consider the
29772 newly added data as a candidate for immediate flushing, but rather
29773 make it wait until the next round of writing. Otherwise, we flush
29774 and refill recursively, and a single greedy TLS connection can
29775 eat all of our bandwidth. Bugfix on 0.1.2.7-alpha.
29777 o Minor features (v3 authority system):
29778 - Add more ways for tools to download the votes that lead to the
29780 - Send a 503 when low on bandwidth and a vote, consensus, or
29781 certificate is requested.
29782 - If-modified-since is now implemented properly for all kinds of
29783 certificate requests.
29785 o Minor bugfixes (network statuses):
29786 - Tweak the implementation of proposal 109 slightly: allow at most
29787 two Tor servers on the same IP address, except if it's the location
29788 of a directory authority, in which case allow five. Bugfix on
29791 o Minor bugfixes (controller):
29792 - When sending a status event to the controller telling it that an
29793 OR address is reachable, set the port correctly. (Previously we
29794 were reporting the dir port.) Bugfix on 0.1.2.x.
29796 o Minor bugfixes (v3 directory system):
29797 - Fix logic to look up a cert by its signing key digest. Bugfix on
29799 - Only change the reply to a vote to "OK" if it's not already
29800 set. This gets rid of annoying "400 OK" log messages, which may
29801 have been masking some deeper issue. Bugfix on 0.2.0.7-alpha.
29802 - When we get a valid consensus, recompute the voting schedule.
29803 - Base the valid-after time of a vote on the consensus voting
29804 schedule, not on our preferred schedule.
29805 - Make the return values and messages from signature uploads and
29806 downloads more sensible.
29807 - Fix a memory leak when serving votes and consensus documents, and
29808 another when serving certificates.
29810 o Minor bugfixes (performance):
29811 - Use a slightly simpler string hashing algorithm (copying Python's
29812 instead of Java's) and optimize our digest hashing algorithm to take
29813 advantage of 64-bit platforms and to remove some possibly-costly
29815 - Fix a minor memory leak whenever we parse guards from our state
29816 file. Bugfix on 0.2.0.7-alpha.
29817 - Fix a minor memory leak whenever we write out a file. Bugfix on
29819 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
29820 command. Bugfix on 0.2.0.5-alpha.
29822 o Minor bugfixes (portability):
29823 - On some platforms, accept() can return a broken address. Detect
29824 this more quietly, and deal accordingly. Fixes bug 483.
29825 - Stop calling tor_strlower() on uninitialized memory in some cases.
29826 Bugfix in 0.2.0.7-alpha.
29828 o Minor bugfixes (usability):
29829 - Treat some 403 responses from directory servers as INFO rather than
29830 WARN-severity events.
29831 - It's not actually an error to find a non-pending entry in the DNS
29832 cache when canceling a pending resolve. Don't log unless stuff is
29833 fishy. Resolves bug 463.
29835 o Minor bugfixes (anonymity):
29836 - Never report that we've used more bandwidth than we're willing to
29837 relay: it leaks how much non-relay traffic we're using. Resolves
29839 - When looking for a circuit to cannibalize, consider family as well
29840 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
29841 circuit cannibalization).
29843 o Code simplifications and refactoring:
29844 - Make a bunch of functions static. Remove some dead code.
29845 - Pull out about a third of the really big routerlist.c; put it in a
29846 new module, networkstatus.c.
29847 - Merge the extra fields in local_routerstatus_t back into
29848 routerstatus_t: we used to need one routerstatus_t for each
29849 authority's opinion, plus a local_routerstatus_t for the locally
29850 computed consensus opinion. To save space, we put the locally
29851 modified fields into local_routerstatus_t, and only the common
29852 stuff into routerstatus_t. But once v3 directories are in use,
29853 clients and caches will no longer need to hold authority opinions;
29854 thus, the rationale for keeping the types separate is now gone.
29855 - Make the code used to reschedule and reattempt downloads more
29857 - Turn all 'Are we a directory server/mirror?' logic into a call to
29859 - Remove the code to generate the oldest (v1) directory format.
29860 The code has been disabled since 0.2.0.5-alpha.
29863 Changes in version 0.2.0.7-alpha - 2007-09-21
29864 This seventh development snapshot makes bridges work again, makes bridge
29865 authorities work for the first time, fixes two huge performance flaws
29866 in hidden services, and fixes a variety of minor issues.
29868 o New directory authorities:
29869 - Set up moria1 and tor26 as the first v3 directory authorities. See
29870 doc/spec/dir-spec.txt for details on the new directory design.
29872 o Major bugfixes (crashes):
29873 - Fix possible segfaults in functions called from
29874 rend_process_relay_cell(). Bugfix on 0.1.2.x.
29876 o Major bugfixes (bridges):
29877 - Fix a bug that made servers send a "404 Not found" in response to
29878 attempts to fetch their server descriptor. This caused Tor servers
29879 to take many minutes to establish reachability for their DirPort,
29880 and it totally crippled bridges. Bugfix on 0.2.0.5-alpha.
29881 - Make "UpdateBridgesFromAuthority" torrc option work: when bridge
29882 users configure that and specify a bridge with an identity
29883 fingerprint, now they will lookup the bridge descriptor at the
29884 default bridge authority via a one-hop tunnel, but once circuits
29885 are established they will switch to a three-hop tunnel for later
29886 connections to the bridge authority. Bugfix in 0.2.0.3-alpha.
29888 o Major bugfixes (hidden services):
29889 - Hidden services were choosing introduction points uniquely by
29890 hexdigest, but when constructing the hidden service descriptor
29891 they merely wrote the (potentially ambiguous) nickname.
29892 - Clients now use the v2 intro format for hidden service
29893 connections: they specify their chosen rendezvous point by identity
29894 digest rather than by (potentially ambiguous) nickname. Both
29895 are bugfixes on 0.1.2.x, and they could speed up hidden service
29896 connections dramatically. Thanks to Karsten Loesing.
29898 o Minor features (security):
29899 - As a client, do not believe any server that tells us that an
29900 address maps to an internal address space.
29901 - Make it possible to enable HashedControlPassword and
29902 CookieAuthentication at the same time.
29904 o Minor features (guard nodes):
29905 - Tag every guard node in our state file with the version that
29906 we believe added it, or with our own version if we add it. This way,
29907 if a user temporarily runs an old version of Tor and then switches
29908 back to a new one, she doesn't automatically lose her guards.
29910 o Minor features (speed):
29911 - When implementing AES counter mode, update only the portions of the
29912 counter buffer that need to change, and don't keep separate
29913 network-order and host-order counters when they are the same (i.e.,
29914 on big-endian hosts.)
29916 o Minor features (controller):
29917 - Accept LF instead of CRLF on controller, since some software has a
29918 hard time generating real Internet newlines.
29919 - Add GETINFO values for the server status events
29920 "REACHABILITY_SUCCEEDED" and "GOOD_SERVER_DESCRIPTOR". Patch from
29923 o Removed features:
29924 - Routers no longer include bandwidth-history lines in their
29925 descriptors; this information is already available in extra-info
29926 documents, and including it in router descriptors took up 60%
29927 (!) of compressed router descriptor downloads. Completes
29928 implementation of proposal 104.
29929 - Remove the contrib scripts ExerciseServer.py, PathDemo.py,
29930 and TorControl.py, as they use the old v0 controller protocol,
29931 and are obsoleted by TorFlow anyway.
29932 - Drop support for v1 rendezvous descriptors, since we never used
29933 them anyway, and the code has probably rotted by now. Based on
29934 patch from Karsten Loesing.
29935 - On OSX, stop warning the user that kqueue support in libevent is
29936 "experimental", since it seems to have worked fine for ages.
29939 - When generating information telling us how to extend to a given
29940 router, do not try to include the nickname if it is absent. Fixes
29941 bug 467. Bugfix on 0.2.0.3-alpha.
29942 - Fix a user-triggerable (but not remotely-triggerable) segfault
29943 in expand_filename(). Bugfix on 0.1.2.x.
29944 - Fix a memory leak when freeing incomplete requests from DNSPort.
29945 Found by Niels Provos with valgrind. Bugfix on 0.2.0.1-alpha.
29946 - Don't try to access (or alter) the state file when running
29947 --list-fingerprint or --verify-config or --hash-password. (Resolves
29948 bug 499.) Bugfix on 0.1.2.x.
29949 - Servers used to decline to publish their DirPort if their
29950 BandwidthRate, RelayBandwidthRate, or MaxAdvertisedBandwidth
29951 were below a threshold. Now they only look at BandwidthRate and
29952 RelayBandwidthRate. Bugfix on 0.1.2.x.
29953 - Remove an optimization in the AES counter-mode code that assumed
29954 that the counter never exceeded 2^68. When the counter can be set
29955 arbitrarily as an IV (as it is by Karsten's new hidden services
29956 code), this assumption no longer holds. Bugfix on 0.1.2.x.
29957 - Resume listing "AUTHORITY" flag for authorities in network status.
29958 Bugfix on 0.2.0.3-alpha; reported by Alex de Joode.
29960 o Code simplifications and refactoring:
29961 - Revamp file-writing logic so we don't need to have the entire
29962 contents of a file in memory at once before we write to disk. Tor,
29964 - Turn "descriptor store" into a full-fledged type.
29965 - Move all NT services code into a separate source file.
29966 - Unify all code that computes medians, percentile elements, etc.
29967 - Get rid of a needless malloc when parsing address policies.
29970 Changes in version 0.1.2.17 - 2007-08-30
29971 Tor 0.1.2.17 features a new Vidalia version in the Windows and OS
29972 X bundles. Vidalia 0.0.14 makes authentication required for the
29973 ControlPort in the default configuration, which addresses important
29974 security risks. Everybody who uses Vidalia (or another controller)
29977 In addition, this Tor update fixes major load balancing problems with
29978 path selection, which should speed things up a lot once many people
29981 o Major bugfixes (security):
29982 - We removed support for the old (v0) control protocol. It has been
29983 deprecated since Tor 0.1.1.1-alpha, and keeping it secure has
29984 become more of a headache than it's worth.
29986 o Major bugfixes (load balancing):
29987 - When choosing nodes for non-guard positions, weight guards
29988 proportionally less, since they already have enough load. Patch
29990 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
29991 will allow fast Tor servers to get more attention.
29992 - When we're upgrading from an old Tor version, forget our current
29993 guards and pick new ones according to the new weightings. These
29994 three load balancing patches could raise effective network capacity
29995 by a factor of four. Thanks to Mike Perry for measurements.
29997 o Major bugfixes (stream expiration):
29998 - Expire not-yet-successful application streams in all cases if
29999 they've been around longer than SocksTimeout. Right now there are
30000 some cases where the stream will live forever, demanding a new
30001 circuit every 15 seconds. Fixes bug 454; reported by lodger.
30003 o Minor features (controller):
30004 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
30005 is valid before any authentication has been received. It tells
30006 a controller what kind of authentication is expected, and what
30007 protocol is spoken. Implements proposal 119.
30009 o Minor bugfixes (performance):
30010 - Save on most routerlist_assert_ok() calls in routerlist.c, thus
30011 greatly speeding up loading cached-routers from disk on startup.
30012 - Disable sentinel-based debugging for buffer code: we squashed all
30013 the bugs that this was supposed to detect a long time ago, and now
30014 its only effect is to change our buffer sizes from nice powers of
30015 two (which platform mallocs tend to like) to values slightly over
30016 powers of two (which make some platform mallocs sad).
30018 o Minor bugfixes (misc):
30019 - If exit bandwidth ever exceeds one third of total bandwidth, then
30020 use the correct formula to weight exit nodes when choosing paths.
30021 Based on patch from Mike Perry.
30022 - Choose perfectly fairly among routers when choosing by bandwidth and
30023 weighting by fraction of bandwidth provided by exits. Previously, we
30024 would choose with only approximate fairness, and correct ourselves
30025 if we ran off the end of the list.
30026 - If we require CookieAuthentication but we fail to write the
30027 cookie file, we would warn but not exit, and end up in a state
30028 where no controller could authenticate. Now we exit.
30029 - If we require CookieAuthentication, stop generating a new cookie
30030 every time we change any piece of our config.
30031 - Refuse to start with certain directory authority keys, and
30032 encourage people using them to stop.
30033 - Terminate multi-line control events properly. Original patch
30035 - Fix a minor memory leak when we fail to find enough suitable
30036 servers to choose a circuit.
30037 - Stop leaking part of the descriptor when we run into a particularly
30038 unparseable piece of it.
30041 Changes in version 0.2.0.6-alpha - 2007-08-26
30042 This sixth development snapshot features a new Vidalia version in the
30043 Windows and OS X bundles. Vidalia 0.0.14 makes authentication required for
30044 the ControlPort in the default configuration, which addresses important
30047 In addition, this snapshot fixes major load balancing problems
30048 with path selection, which should speed things up a lot once many
30049 people have upgraded. The directory authorities also use a new
30050 mean-time-between-failure approach to tracking which servers are stable,
30051 rather than just looking at the most recent uptime.
30053 o New directory authorities:
30054 - Set up Tonga as the default bridge directory authority.
30057 - Directory authorities now track servers by weighted
30058 mean-times-between-failures. When we have 4 or more days of data,
30059 use measured MTBF rather than declared uptime to decide whether
30060 to call a router Stable. Implements proposal 108.
30062 o Major bugfixes (load balancing):
30063 - When choosing nodes for non-guard positions, weight guards
30064 proportionally less, since they already have enough load. Patch
30066 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
30067 will allow fast Tor servers to get more attention.
30068 - When we're upgrading from an old Tor version, forget our current
30069 guards and pick new ones according to the new weightings. These
30070 three load balancing patches could raise effective network capacity
30071 by a factor of four. Thanks to Mike Perry for measurements.
30073 o Major bugfixes (descriptor parsing):
30074 - Handle unexpected whitespace better in malformed descriptors. Bug
30075 found using Benedikt Boss's new Tor fuzzer! Bugfix on 0.2.0.x.
30078 - There is now an ugly, temporary "desc/all-recent-extrainfo-hack"
30079 GETINFO for Torstat to use until it can switch to using extrainfos.
30080 - Optionally (if built with -DEXPORTMALLINFO) export the output
30081 of mallinfo via http, as tor/mallinfo.txt. Only accessible
30085 - Do not intermix bridge routers with controller-added
30086 routers. (Bugfix on 0.2.0.x)
30087 - Do not fail with an assert when accept() returns an unexpected
30088 address family. Addresses but does not wholly fix bug 483. (Bugfix
30090 - Let directory authorities startup even when they can't generate
30091 a descriptor immediately, e.g. because they don't know their
30093 - Stop putting the authentication cookie in a file called "0"
30094 in your working directory if you don't specify anything for the
30095 new CookieAuthFile option. Reported by Matt Edman.
30096 - Make it possible to read the PROTOCOLINFO response in a way that
30097 conforms to our control-spec. Reported by Matt Edman.
30098 - Fix a minor memory leak when we fail to find enough suitable
30099 servers to choose a circuit. Bugfix on 0.1.2.x.
30100 - Stop leaking part of the descriptor when we run into a particularly
30101 unparseable piece of it. Bugfix on 0.1.2.x.
30102 - Unmap the extrainfo cache file on exit.
30105 Changes in version 0.2.0.5-alpha - 2007-08-19
30106 This fifth development snapshot fixes compilation on Windows again;
30107 fixes an obnoxious client-side bug that slowed things down and put
30108 extra load on the network; gets us closer to using the v3 directory
30109 voting scheme; makes it easier for Tor controllers to use cookie-based
30110 authentication; and fixes a variety of other bugs.
30112 o Removed features:
30113 - Version 1 directories are no longer generated in full. Instead,
30114 authorities generate and serve "stub" v1 directories that list
30115 no servers. This will stop Tor versions 0.1.0.x and earlier from
30116 working, but (for security reasons) nobody should be running those
30119 o Major bugfixes (compilation, 0.2.0.x):
30120 - Try to fix Win32 compilation again: improve checking for IPv6 types.
30121 - Try to fix MSVC compilation: build correctly on platforms that do
30122 not define s6_addr16 or s6_addr32.
30123 - Fix compile on platforms without getaddrinfo: bug found by Li-Hui
30126 o Major bugfixes (stream expiration):
30127 - Expire not-yet-successful application streams in all cases if
30128 they've been around longer than SocksTimeout. Right now there are
30129 some cases where the stream will live forever, demanding a new
30130 circuit every 15 seconds. Bugfix on 0.1.2.7-alpha; fixes bug 454;
30131 reported by lodger.
30133 o Minor features (directory servers):
30134 - When somebody requests a list of statuses or servers, and we have
30135 none of those, return a 404 rather than an empty 200.
30137 o Minor features (directory voting):
30138 - Store v3 consensus status consensuses on disk, and reload them
30141 o Minor features (security):
30142 - Warn about unsafe ControlPort configurations.
30143 - Refuse to start with certain directory authority keys, and
30144 encourage people using them to stop.
30146 o Minor features (controller):
30147 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
30148 is valid before any authentication has been received. It tells
30149 a controller what kind of authentication is expected, and what
30150 protocol is spoken. Implements proposal 119.
30151 - New config option CookieAuthFile to choose a new location for the
30152 cookie authentication file, and config option
30153 CookieAuthFileGroupReadable to make it group-readable.
30155 o Minor features (unit testing):
30156 - Add command-line arguments to unit-test executable so that we can
30157 invoke any chosen test from the command line rather than having
30158 to run the whole test suite at once; and so that we can turn on
30159 logging for the unit tests.
30161 o Minor bugfixes (on 0.1.2.x):
30162 - If we require CookieAuthentication but we fail to write the
30163 cookie file, we would warn but not exit, and end up in a state
30164 where no controller could authenticate. Now we exit.
30165 - If we require CookieAuthentication, stop generating a new cookie
30166 every time we change any piece of our config.
30167 - When loading bandwidth history, do not believe any information in
30168 the future. Fixes bug 434.
30169 - When loading entry guard information, do not believe any information
30171 - When we have our clock set far in the future and generate an
30172 onion key, then re-set our clock to be correct, we should not stop
30173 the onion key from getting rotated.
30174 - Clean up torrc sample config file.
30175 - Do not automatically run configure from autogen.sh. This
30176 non-standard behavior tended to annoy people who have built other
30179 o Minor bugfixes (on 0.2.0.x):
30180 - Fix a bug with AutomapHostsOnResolve that would always cause
30181 the second request to fail. Bug reported by Kate. Bugfix on
30183 - Fix a bug in ADDRMAP controller replies that would sometimes
30184 try to print a NULL. Patch from tup.
30185 - Read v3 directory authority keys from the right location.
30186 - Numerous bugfixes to directory voting code.
30189 Changes in version 0.1.2.16 - 2007-08-01
30190 Tor 0.1.2.16 fixes a critical security vulnerability that allows a
30191 remote attacker in certain situations to rewrite the user's torrc
30192 configuration file. This can completely compromise anonymity of users
30193 in most configurations, including those running the Vidalia bundles,
30194 TorK, etc. Or worse.
30196 o Major security fixes:
30197 - Close immediately after missing authentication on control port;
30198 do not allow multiple authentication attempts.
30201 Changes in version 0.2.0.4-alpha - 2007-08-01
30202 This fourth development snapshot fixes a critical security vulnerability
30203 for most users, specifically those running Vidalia, TorK, etc. Everybody
30204 should upgrade to either 0.1.2.16 or 0.2.0.4-alpha.
30206 o Major security fixes:
30207 - Close immediately after missing authentication on control port;
30208 do not allow multiple authentication attempts.
30210 o Major bugfixes (compilation):
30211 - Fix win32 compilation: apparently IN_ADDR and IN6_ADDR are already
30214 o Minor features (performance):
30215 - Be even more aggressive about releasing RAM from small
30216 empty buffers. Thanks to our free-list code, this shouldn't be too
30217 performance-intensive.
30218 - Disable sentinel-based debugging for buffer code: we squashed all
30219 the bugs that this was supposed to detect a long time ago, and
30220 now its only effect is to change our buffer sizes from nice
30221 powers of two (which platform mallocs tend to like) to values
30222 slightly over powers of two (which make some platform mallocs sad).
30223 - Log malloc statistics from mallinfo() on platforms where it
30227 Changes in version 0.2.0.3-alpha - 2007-07-29
30228 This third development snapshot introduces new experimental
30229 blocking-resistance features and a preliminary version of the v3
30230 directory voting design, and includes many other smaller features
30234 - The first pieces of our "bridge" design for blocking-resistance
30235 are implemented. People can run bridge directory authorities;
30236 people can run bridges; and people can configure their Tor clients
30237 with a set of bridges to use as the first hop into the Tor network.
30238 See http://archives.seul.org/or/talk/Jul-2007/msg00249.html for
30240 - Create listener connections before we setuid to the configured
30241 User and Group. Now non-Windows users can choose port values
30242 under 1024, start Tor as root, and have Tor bind those ports
30243 before it changes to another UID. (Windows users could already
30245 - Added a new ConstrainedSockets config option to set SO_SNDBUF and
30246 SO_RCVBUF on TCP sockets. Hopefully useful for Tor servers running
30247 on "vserver" accounts. (Patch from coderman.)
30248 - Be even more aggressive about separating local traffic from relayed
30249 traffic when RelayBandwidthRate is set. (Refines proposal 111.)
30251 o Major features (experimental):
30252 - First cut of code for "v3 dir voting": directory authorities will
30253 vote on a common network status document rather than each publishing
30254 their own opinion. This code needs more testing and more corner-case
30255 handling before it's ready for use.
30258 - Directory authorities now call routers Fast if their bandwidth is
30259 at least 100KB/s, and consider their bandwidth adequate to be a
30260 Guard if it is at least 250KB/s, no matter the medians. This fix
30261 complements proposal 107. [Bugfix on 0.1.2.x]
30262 - Directory authorities now never mark more than 3 servers per IP as
30263 Valid and Running. (Implements proposal 109, by Kevin Bauer and
30265 - Minor change to organizationName and commonName generation
30266 procedures in TLS certificates during Tor handshakes, to invalidate
30267 some earlier censorware approaches. This is not a long-term
30268 solution, but applying it will give us a bit of time to look into
30269 the epidemiology of countermeasures as they spread.
30271 o Major bugfixes (directory):
30272 - Rewrite directory tokenization code to never run off the end of
30273 a string. Fixes bug 455. Patch from croup. [Bugfix on 0.1.2.x]
30275 o Minor features (controller):
30276 - Add a SOURCE_ADDR field to STREAM NEW events so that controllers can
30277 match requests to applications. (Patch from Robert Hogan.)
30278 - Report address and port correctly on connections to DNSPort. (Patch
30279 from Robert Hogan.)
30280 - Add a RESOLVE command to launch hostname lookups. (Original patch
30281 from Robert Hogan.)
30282 - Add GETINFO status/enough-dir-info to let controllers tell whether
30283 Tor has downloaded sufficient directory information. (Patch
30285 - You can now use the ControlSocket option to tell Tor to listen for
30286 controller connections on Unix domain sockets on systems that
30287 support them. (Patch from Peter Palfrader.)
30288 - STREAM NEW events are generated for DNSPort requests and for
30289 tunneled directory connections. (Patch from Robert Hogan.)
30290 - New "GETINFO address-mappings/*" command to get address mappings
30291 with expiry information. "addr-mappings/*" is now deprecated.
30294 o Minor features (misc):
30295 - Merge in some (as-yet-unused) IPv6 address manipulation code. (Patch
30297 - The tor-gencert tool for v3 directory authorities now creates all
30298 files as readable to the file creator only, and write-protects
30299 the authority identity key.
30300 - When dumping memory usage, list bytes used in buffer memory
30302 - When running with dmalloc, dump more stats on hup and on exit.
30303 - Directory authorities now fail quickly and (relatively) harmlessly
30304 if they generate a network status document that is somehow
30307 o Traffic load balancing improvements:
30308 - If exit bandwidth ever exceeds one third of total bandwidth, then
30309 use the correct formula to weight exit nodes when choosing paths.
30310 (Based on patch from Mike Perry.)
30311 - Choose perfectly fairly among routers when choosing by bandwidth and
30312 weighting by fraction of bandwidth provided by exits. Previously, we
30313 would choose with only approximate fairness, and correct ourselves
30314 if we ran off the end of the list. [Bugfix on 0.1.2.x]
30316 o Performance improvements:
30317 - Be more aggressive with freeing buffer RAM or putting it on the
30319 - Use Critical Sections rather than Mutexes for synchronizing threads
30320 on win32; Mutexes are heavier-weight, and designed for synchronizing
30323 o Deprecated and removed features:
30324 - RedirectExits is now deprecated.
30325 - Stop allowing address masks that do not correspond to bit prefixes.
30326 We have warned about these for a really long time; now it's time
30327 to reject them. (Patch from croup.)
30329 o Minor bugfixes (directory):
30330 - Fix another crash bug related to extra-info caching. (Bug found by
30331 Peter Palfrader.) [Bugfix on 0.2.0.2-alpha]
30332 - Directories no longer return a "304 not modified" when they don't
30333 have the networkstatus the client asked for. Also fix a memory
30334 leak when returning 304 not modified. [Bugfixes on 0.2.0.2-alpha]
30335 - We had accidentally labelled 0.1.2.x directory servers as not
30336 suitable for begin_dir requests, and had labelled no directory
30337 servers as suitable for uploading extra-info documents. [Bugfix
30340 o Minor bugfixes (dns):
30341 - Fix a crash when DNSPort is set more than once. (Patch from Robert
30342 Hogan.) [Bugfix on 0.2.0.2-alpha]
30343 - Add DNSPort connections to the global connection list, so that we
30344 can time them out correctly. (Bug found by Robert Hogan.) [Bugfix
30346 - Fix a dangling reference that could lead to a crash when DNSPort is
30347 changed or closed (Patch from Robert Hogan.) [Bugfix on
30350 o Minor bugfixes (controller):
30351 - Provide DNS expiry times in GMT, not in local time. For backward
30352 compatibility, ADDRMAP events only provide GMT expiry in an extended
30353 field. "GETINFO address-mappings" always does the right thing.
30354 - Use CRLF line endings properly in NS events.
30355 - Terminate multi-line control events properly. (Original patch
30356 from tup.) [Bugfix on 0.1.2.x-alpha]
30357 - Do not include spaces in SOURCE_ADDR fields in STREAM
30358 events. Resolves bug 472. [Bugfix on 0.2.0.x-alpha]
30361 Changes in version 0.1.2.15 - 2007-07-17
30362 Tor 0.1.2.15 fixes several crash bugs, fixes some anonymity-related
30363 problems, fixes compilation on BSD, and fixes a variety of other
30364 bugs. Everybody should upgrade.
30366 o Major bugfixes (compilation):
30367 - Fix compile on FreeBSD/NetBSD/OpenBSD. Oops.
30369 o Major bugfixes (crashes):
30370 - Try even harder not to dereference the first character after
30371 an mmap(). Reported by lodger.
30372 - Fix a crash bug in directory authorities when we re-number the
30373 routerlist while inserting a new router.
30374 - When the cached-routers file is an even multiple of the page size,
30375 don't run off the end and crash. (Fixes bug 455; based on idea
30377 - Fix eventdns.c behavior on Solaris: It is critical to include
30378 orconfig.h _before_ sys/types.h, so that we can get the expected
30379 definition of _FILE_OFFSET_BITS.
30381 o Major bugfixes (security):
30382 - Fix a possible buffer overrun when using BSD natd support. Bug
30384 - When sending destroy cells from a circuit's origin, don't include
30385 the reason for tearing down the circuit. The spec says we didn't,
30386 and now we actually don't. Reported by lodger.
30387 - Keep streamids from different exits on a circuit separate. This
30388 bug may have allowed other routers on a given circuit to inject
30389 cells into streams. Reported by lodger; fixes bug 446.
30390 - If there's a never-before-connected-to guard node in our list,
30391 never choose any guards past it. This way we don't expand our
30392 guard list unless we need to.
30394 o Minor bugfixes (guard nodes):
30395 - Weight guard selection by bandwidth, so that low-bandwidth nodes
30396 don't get overused as guards.
30398 o Minor bugfixes (directory):
30399 - Correctly count the number of authorities that recommend each
30400 version. Previously, we were under-counting by 1.
30401 - Fix a potential crash bug when we load many server descriptors at
30402 once and some of them make others of them obsolete. Fixes bug 458.
30404 o Minor bugfixes (hidden services):
30405 - Stop tearing down the whole circuit when the user asks for a
30406 connection to a port that the hidden service didn't configure.
30409 o Minor bugfixes (misc):
30410 - On Windows, we were preventing other processes from reading
30411 cached-routers while Tor was running. Reported by janbar.
30412 - Fix a possible (but very unlikely) bug in picking routers by
30413 bandwidth. Add a log message to confirm that it is in fact
30414 unlikely. Patch from lodger.
30415 - Backport a couple of memory leak fixes.
30416 - Backport miscellaneous cosmetic bugfixes.
30419 Changes in version 0.2.0.2-alpha - 2007-06-02
30420 o Major bugfixes on 0.2.0.1-alpha:
30421 - Fix an assertion failure related to servers without extra-info digests.
30422 Resolves bugs 441 and 442.
30424 o Minor features (directory):
30425 - Support "If-Modified-Since" when answering HTTP requests for
30426 directories, running-routers documents, and network-status documents.
30427 (There's no need to support it for router descriptors, since those
30428 are downloaded by descriptor digest.)
30430 o Minor build issues:
30431 - Clear up some MIPSPro compiler warnings.
30432 - When building from a tarball on a machine that happens to have SVK
30433 installed, report the micro-revision as whatever version existed
30434 in the tarball, not as "x".
30437 Changes in version 0.2.0.1-alpha - 2007-06-01
30438 This early development snapshot provides new features for people running
30439 Tor as both a client and a server (check out the new RelayBandwidth
30440 config options); lets Tor run as a DNS proxy; and generally moves us
30441 forward on a lot of fronts.
30443 o Major features, server usability:
30444 - New config options RelayBandwidthRate and RelayBandwidthBurst:
30445 a separate set of token buckets for relayed traffic. Right now
30446 relayed traffic is defined as answers to directory requests, and
30447 OR connections that don't have any local circuits on them.
30449 o Major features, client usability:
30450 - A client-side DNS proxy feature to replace the need for
30451 dns-proxy-tor: Just set "DNSPort 9999", and Tor will now listen
30452 for DNS requests on port 9999, use the Tor network to resolve them
30453 anonymously, and send the reply back like a regular DNS server.
30454 The code still only implements a subset of DNS.
30455 - Make PreferTunneledDirConns and TunnelDirConns work even when
30456 we have no cached directory info. This means Tor clients can now
30457 do all of their connections protected by TLS.
30459 o Major features, performance and efficiency:
30460 - Directory authorities accept and serve "extra info" documents for
30461 routers. These documents contain fields from router descriptors
30462 that aren't usually needed, and that use a lot of excess
30463 bandwidth. Once these fields are removed from router descriptors,
30464 the bandwidth savings should be about 60%. [Partially implements
30466 - Servers upload extra-info documents to any authority that accepts
30467 them. Authorities (and caches that have been configured to download
30468 extra-info documents) download them as needed. [Partially implements
30470 - Change the way that Tor buffers data that it is waiting to write.
30471 Instead of queueing data cells in an enormous ring buffer for each
30472 client->OR or OR->OR connection, we now queue cells on a separate
30473 queue for each circuit. This lets us use less slack memory, and
30474 will eventually let us be smarter about prioritizing different kinds
30476 - Use memory pools to allocate cells with better speed and memory
30477 efficiency, especially on platforms where malloc() is inefficient.
30478 - Stop reading on edge connections when their corresponding circuit
30479 buffers are full; start again as the circuits empty out.
30481 o Major features, other:
30482 - Add an HSAuthorityRecordStats option that hidden service authorities
30483 can use to track statistics of overall hidden service usage without
30484 logging information that would be very useful to an attacker.
30485 - Start work implementing multi-level keys for directory authorities:
30486 Add a standalone tool to generate key certificates. (Proposal 103.)
30489 - Directory authorities now call routers Stable if they have an
30490 uptime of at least 30 days, even if that's not the median uptime
30491 in the network. Implements proposal 107, suggested by Kevin Bauer
30494 o Minor fixes (resource management):
30495 - Count the number of open sockets separately from the number
30496 of active connection_t objects. This will let us avoid underusing
30497 our allocated connection limit.
30498 - We no longer use socket pairs to link an edge connection to an
30499 anonymous directory connection or a DirPort test connection.
30500 Instead, we track the link internally and transfer the data
30501 in-process. This saves two sockets per "linked" connection (at the
30502 client and at the server), and avoids the nasty Windows socketpair()
30504 - Keep unused 4k and 16k buffers on free lists, rather than wasting 8k
30505 for every single inactive connection_t. Free items from the
30506 4k/16k-buffer free lists when they haven't been used for a while.
30508 o Minor features (build):
30509 - Make autoconf search for libevent, openssl, and zlib consistently.
30510 - Update deprecated macros in configure.in.
30511 - When warning about missing headers, tell the user to let us
30512 know if the compile succeeds anyway, so we can downgrade the
30514 - Include the current subversion revision as part of the version
30515 string: either fetch it directly if we're in an SVN checkout, do
30516 some magic to guess it if we're in an SVK checkout, or use
30517 the last-detected version if we're building from a .tar.gz.
30518 Use this version consistently in log messages.
30520 o Minor features (logging):
30521 - Always prepend "Bug: " to any log message about a bug.
30522 - Put a platform string (e.g. "Linux i686") in the startup log
30523 message, so when people paste just their logs, we know if it's
30524 OpenBSD or Windows or what.
30525 - When logging memory usage, break down memory used in buffers by
30528 o Minor features (directory system):
30529 - New config option V2AuthoritativeDirectory that all directory
30530 authorities should set. This will let future authorities choose
30531 not to serve V2 directory information.
30532 - Directory authorities allow multiple router descriptors and/or extra
30533 info documents to be uploaded in a single go. This will make
30534 implementing proposal 104 simpler.
30536 o Minor features (controller):
30537 - Add a new config option __DisablePredictedCircuits designed for
30538 use by the controller, when we don't want Tor to build any circuits
30540 - Let the controller specify HOP=%d as an argument to ATTACHSTREAM,
30541 so we can exit from the middle of the circuit.
30542 - Implement "getinfo status/circuit-established".
30543 - Implement "getinfo status/version/..." so a controller can tell
30544 whether the current version is recommended, and whether any versions
30545 are good, and how many authorities agree. (Patch from shibz.)
30547 o Minor features (hidden services):
30548 - Allow multiple HiddenServicePort directives with the same virtual
30549 port; when they occur, the user is sent round-robin to one
30550 of the target ports chosen at random. Partially fixes bug 393 by
30551 adding limited ad-hoc round-robining.
30553 o Minor features (other):
30555 - Add a new AutomapHostsOnResolve option: when it is enabled, any
30556 resolve request for hosts matching a given pattern causes Tor to
30557 generate an internal virtual address mapping for that host. This
30558 allows DNSPort to work sensibly with hidden service users. By
30559 default, .exit and .onion addresses are remapped; the list of
30560 patterns can be reconfigured with AutomapHostsSuffixes.
30561 - Add an "-F" option to tor-resolve to force a resolve for a .onion
30562 address. Thanks to the AutomapHostsOnResolve option, this is no
30563 longer a completely silly thing to do.
30564 - If Tor is invoked from something that isn't a shell (e.g. Vidalia),
30565 now we expand "-f ~/.tor/torrc" correctly. Suggested by Matt Edman.
30566 - Treat "2gb" when given in torrc for a bandwidth as meaning 2gb,
30567 minus 1 byte: the actual maximum declared bandwidth.
30569 o Removed features:
30570 - Removed support for the old binary "version 0" controller protocol.
30571 This has been deprecated since 0.1.1, and warnings have been issued
30572 since 0.1.2. When we encounter a v0 control message, we now send
30573 back an error and close the connection.
30574 - Remove the old "dns worker" server DNS code: it hasn't been default
30575 since 0.1.2.2-alpha, and all the servers seem to be using the new
30578 o Minor bugfixes (portability):
30579 - Even though Windows is equally happy with / and \ as path separators,
30580 try to use \ consistently on Windows and / consistently on Unix: it
30581 makes the log messages nicer.
30582 - Correctly report platform name on Windows 95 OSR2 and Windows 98 SE.
30583 - Read resolv.conf files correctly on platforms where read() returns
30584 partial results on small file reads.
30586 o Minor bugfixes (directory):
30587 - Correctly enforce that elements of directory objects do not appear
30588 more often than they are allowed to appear.
30589 - When we are reporting the DirServer line we just parsed, we were
30590 logging the second stanza of the key fingerprint, not the first.
30592 o Minor bugfixes (logging):
30593 - When we hit an EOF on a log (probably because we're shutting down),
30594 don't try to remove the log from the list: just mark it as
30595 unusable. (Bulletproofs against bug 222.)
30597 o Minor bugfixes (other):
30598 - In the exitlist script, only consider the most recently published
30599 server descriptor for each server. Also, when the user requests
30600 a list of servers that _reject_ connections to a given address,
30601 explicitly exclude the IPs that also have servers that accept
30602 connections to that address. (Resolves bug 405.)
30603 - Stop allowing hibernating servers to be "stable" or "fast".
30604 - On Windows, we were preventing other processes from reading
30605 cached-routers while Tor was running. (Reported by janbar)
30606 - Make the NodeFamilies config option work. (Reported by
30607 lodger -- it has never actually worked, even though we added it
30609 - Check return values from pthread_mutex functions.
30610 - Don't save non-general-purpose router descriptors to the disk cache,
30611 because we have no way of remembering what their purpose was when
30613 - Add even more asserts to hunt down bug 417.
30614 - Build without verbose warnings even on (not-yet-released) gcc 4.2.
30615 - Fix a possible (but very unlikely) bug in picking routers by bandwidth.
30616 Add a log message to confirm that it is in fact unlikely.
30618 o Minor bugfixes (controller):
30619 - Make 'getinfo fingerprint' return a 551 error if we're not a
30620 server, so we match what the control spec claims we do. Reported
30622 - Fix a typo in an error message when extendcircuit fails that
30623 caused us to not follow the \r\n-based delimiter protocol. Reported
30626 o Code simplifications and refactoring:
30627 - Stop passing around circuit_t and crypt_path_t pointers that are
30628 implicit in other procedure arguments.
30629 - Drop the old code to choke directory connections when the
30630 corresponding OR connections got full: thanks to the cell queue
30631 feature, OR conns don't get full any more.
30632 - Make dns_resolve() handle attaching connections to circuits
30633 properly, so the caller doesn't have to.
30634 - Rename wants_to_read and wants_to_write to read/write_blocked_on_bw.
30635 - Keep the connection array as a dynamic smartlist_t, rather than as
30636 a fixed-sized array. This is important, as the number of connections
30637 is becoming increasingly decoupled from the number of sockets.
30640 Changes in version 0.1.2.14 - 2007-05-25
30641 Tor 0.1.2.14 changes the addresses of two directory authorities (this
30642 change especially affects those who serve or use hidden services),
30643 and fixes several other crash- and security-related bugs.
30645 o Directory authority changes:
30646 - Two directory authorities (moria1 and moria2) just moved to new
30647 IP addresses. This change will particularly affect those who serve
30648 or use hidden services.
30650 o Major bugfixes (crashes):
30651 - If a directory server runs out of space in the connection table
30652 as it's processing a begin_dir request, it will free the exit stream
30653 but leave it attached to the circuit, leading to unpredictable
30654 behavior. (Reported by seeess, fixes bug 425.)
30655 - Fix a bug in dirserv_remove_invalid() that would cause authorities
30656 to corrupt memory under some really unlikely scenarios.
30657 - Tighten router parsing rules. (Bugs reported by Benedikt Boss.)
30658 - Avoid segfaults when reading from mmaped descriptor file. (Reported
30661 o Major bugfixes (security):
30662 - When choosing an entry guard for a circuit, avoid using guards
30663 that are in the same family as the chosen exit -- not just guards
30664 that are exactly the chosen exit. (Reported by lodger.)
30666 o Major bugfixes (resource management):
30667 - If a directory authority is down, skip it when deciding where to get
30668 networkstatus objects or descriptors. Otherwise we keep asking
30669 every 10 seconds forever. Fixes bug 384.
30670 - Count it as a failure if we fetch a valid network-status but we
30671 don't want to keep it. Otherwise we'll keep fetching it and keep
30672 not wanting to keep it. Fixes part of bug 422.
30673 - If all of our dirservers have given us bad or no networkstatuses
30674 lately, then stop hammering them once per minute even when we
30675 think they're failed. Fixes another part of bug 422.
30678 - Actually set the purpose correctly for descriptors inserted with
30679 purpose=controller.
30680 - When we have k non-v2 authorities in our DirServer config,
30681 we ignored the last k authorities in the list when updating our
30683 - Correctly back-off from requesting router descriptors that we are
30684 having a hard time downloading.
30685 - Read resolv.conf files correctly on platforms where read() returns
30686 partial results on small file reads.
30687 - Don't rebuild the entire router store every time we get 32K of
30688 routers: rebuild it when the journal gets very large, or when
30689 the gaps in the store get very large.
30692 - When routers publish SVN revisions in their router descriptors,
30693 authorities now include those versions correctly in networkstatus
30695 - Warn when using a version of libevent before 1.3b to run a server on
30696 OSX or BSD: these versions interact badly with userspace threads.
30699 Changes in version 0.1.2.13 - 2007-04-24
30700 This release features some major anonymity fixes, such as safer path
30701 selection; better client performance; faster bootstrapping, better
30702 address detection, and better DNS support for servers; write limiting as
30703 well as read limiting to make servers easier to run; and a huge pile of
30704 other features and bug fixes. The bundles also ship with Vidalia 0.0.11.
30706 Tor 0.1.2.13 is released in memory of Rob Levin (1955-2006), aka lilo
30707 of the Freenode IRC network, remembering his patience and vision for
30708 free speech on the Internet.
30711 - Fix a memory leak when we ask for "all" networkstatuses and we
30712 get one we don't recognize.
30713 - Add more asserts to hunt down bug 417.
30714 - Disable kqueue on OS X 10.3 and earlier, to fix bug 371.
30717 Changes in version 0.1.2.12-rc - 2007-03-16
30719 - Fix an infinite loop introduced in 0.1.2.7-alpha when we serve
30720 directory information requested inside Tor connections (i.e. via
30721 begin_dir cells). It only triggered when the same connection was
30722 serving other data at the same time. Reported by seeess.
30725 - When creating a circuit via the controller, send a 'launched'
30726 event when we're done, so we follow the spec better.
30729 Changes in version 0.1.2.11-rc - 2007-03-15
30730 o Minor bugfixes (controller), reported by daejees:
30731 - Correct the control spec to match how the code actually responds
30732 to 'getinfo addr-mappings/*'.
30733 - The control spec described a GUARDS event, but the code
30734 implemented a GUARD event. Standardize on GUARD, but let people
30735 ask for GUARDS too.
30738 Changes in version 0.1.2.10-rc - 2007-03-07
30739 o Major bugfixes (Windows):
30740 - Do not load the NT services library functions (which may not exist)
30741 just to detect if we're a service trying to shut down. Now we run
30742 on Win98 and friends again.
30744 o Minor bugfixes (other):
30745 - Clarify a couple of log messages.
30746 - Fix a misleading socks5 error number.
30749 Changes in version 0.1.2.9-rc - 2007-03-02
30750 o Major bugfixes (Windows):
30751 - On MinGW, use "%I64u" to printf/scanf 64-bit integers, instead
30752 of the usual GCC "%llu". This prevents a bug when saving 64-bit
30753 int configuration values: the high-order 32 bits would get
30754 truncated. In particular, we were being bitten by the default
30755 MaxAdvertisedBandwidth of 128 TB turning into 0. (Fixes bug 400
30756 and maybe also bug 397.)
30758 o Minor bugfixes (performance):
30759 - Use OpenSSL's AES implementation on platforms where it's faster.
30760 This could save us as much as 10% CPU usage.
30762 o Minor bugfixes (server):
30763 - Do not rotate onion key immediately after setting it for the first
30766 o Minor bugfixes (directory authorities):
30767 - Stop calling servers that have been hibernating for a long time
30768 "stable". Also, stop letting hibernating or obsolete servers affect
30769 uptime and bandwidth cutoffs.
30770 - Stop listing hibernating servers in the v1 directory.
30772 o Minor bugfixes (hidden services):
30773 - Upload hidden service descriptors slightly less often, to reduce
30774 load on authorities.
30776 o Minor bugfixes (other):
30777 - Fix an assert that could trigger if a controller quickly set then
30778 cleared EntryNodes. Bug found by Udo van den Heuvel.
30779 - On architectures where sizeof(int)>4, still clamp declarable bandwidth
30781 - Fix a potential race condition in the rpm installer. Found by
30783 - Try to fix eventdns warnings once and for all: do not treat a dns rcode
30784 of 2 as indicating that the server is completely bad; it sometimes
30785 means that the server is just bad for the request in question. (may fix
30786 the last of bug 326.)
30787 - Disable encrypted directory connections when we don't have a server
30788 descriptor for the destination. We'll get this working again in
30792 Changes in version 0.1.2.8-beta - 2007-02-26
30793 o Major bugfixes (crashes):
30794 - Stop crashing when the controller asks us to resetconf more than
30795 one config option at once. (Vidalia 0.0.11 does this.)
30796 - Fix a crash that happened on Win98 when we're given command-line
30797 arguments: don't try to load NT service functions from advapi32.dll
30798 except when we need them. (Bug introduced in 0.1.2.7-alpha;
30800 - Fix a longstanding obscure crash bug that could occur when
30801 we run out of DNS worker processes. (Resolves bug 390.)
30803 o Major bugfixes (hidden services):
30804 - Correctly detect whether hidden service descriptor downloads are
30805 in-progress. (Suggested by Karsten Loesing; fixes bug 399.)
30807 o Major bugfixes (accounting):
30808 - When we start during an accounting interval before it's time to wake
30809 up, remember to wake up at the correct time. (May fix bug 342.)
30811 o Minor bugfixes (controller):
30812 - Give the controller END_STREAM_REASON_DESTROY events _before_ we
30813 clear the corresponding on_circuit variable, and remember later
30814 that we don't need to send a redundant CLOSED event. Resolves part
30816 - Report events where a resolve succeeded or where we got a socks
30817 protocol error correctly, rather than calling both of them
30819 - Change reported stream target addresses to IP consistently when
30820 we finally get the IP from an exit node.
30821 - Send log messages to the controller even if they happen to be very
30824 o Minor bugfixes (other):
30825 - Display correct results when reporting which versions are
30826 recommended, and how recommended they are. (Resolves bug 383.)
30827 - Improve our estimates for directory bandwidth to be less random:
30828 guess that an unrecognized directory will have the average bandwidth
30829 from all known directories, not that it will have the average
30830 bandwidth from those directories earlier than it on the list.
30831 - If we start a server with ClientOnly 1, then set ClientOnly to 0
30832 and hup, stop triggering an assert based on an empty onion_key.
30833 - On platforms with no working mmap() equivalent, don't warn the
30834 user when cached-routers doesn't exist.
30835 - Warn the user when mmap() [or its equivalent] fails for some reason
30836 other than file-not-found.
30837 - Don't warn the user when cached-routers.new doesn't exist: that's
30838 perfectly fine when starting up for the first time.
30839 - When EntryNodes are configured, rebuild the guard list to contain,
30840 in order: the EntryNodes that were guards before; the rest of the
30841 EntryNodes; the nodes that were guards before.
30842 - Mask out all signals in sub-threads; only the libevent signal
30843 handler should be processing them. This should prevent some crashes
30844 on some machines using pthreads. (Patch from coderman.)
30845 - Fix switched arguments on memset in the implementation of
30846 tor_munmap() for systems with no mmap() call.
30847 - When Tor receives a router descriptor that it asked for, but
30848 no longer wants (because it has received fresh networkstatuses
30849 in the meantime), do not warn the user. Cache the descriptor if
30850 we're a cache; drop it if we aren't.
30851 - Make earlier entry guards _really_ get retried when the network
30853 - On a malformed DNS reply, always give an error to the corresponding
30855 - Build with recent libevents on platforms that do not define the
30856 nonstandard types "u_int8_t" and friends.
30858 o Minor features (controller):
30859 - Warn the user when an application uses the obsolete binary v0
30860 control protocol. We're planning to remove support for it during
30861 the next development series, so it's good to give people some
30863 - Add STREAM_BW events to report per-entry-stream bandwidth
30864 use. (Patch from Robert Hogan.)
30865 - Rate-limit SIGNEWNYM signals in response to controllers that
30866 impolitely generate them for every single stream. (Patch from
30867 mwenge; closes bug 394.)
30868 - Make REMAP stream events have a SOURCE (cache or exit), and
30869 make them generated in every case where we get a successful
30870 connected or resolved cell.
30872 o Minor bugfixes (performance):
30873 - Call router_have_min_dir_info half as often. (This is showing up in
30874 some profiles, but not others.)
30875 - When using GCC, make log_debug never get called at all, and its
30876 arguments never get evaluated, when no debug logs are configured.
30877 (This is showing up in some profiles, but not others.)
30880 - Remove some never-implemented options. Mark PathlenCoinWeight as
30882 - Implement proposal 106: Stop requiring clients to have well-formed
30883 certificates; stop checking nicknames in certificates. (Clients
30884 have certificates so that they can look like Tor servers, but in
30885 the future we might want to allow them to look like regular TLS
30886 clients instead. Nicknames in certificates serve no purpose other
30887 than making our protocol easier to recognize on the wire.)
30888 - Revise messages on handshake failure again to be even more clear about
30889 which are incoming connections and which are outgoing.
30890 - Discard any v1 directory info that's over 1 month old (for
30891 directories) or over 1 week old (for running-routers lists).
30892 - Do not warn when individual nodes in the configuration's EntryNodes,
30893 ExitNodes, etc are down: warn only when all possible nodes
30894 are down. (Fixes bug 348.)
30895 - Always remove expired routers and networkstatus docs before checking
30896 whether we have enough information to build circuits. (Fixes
30898 - Put a lower-bound on MaxAdvertisedBandwidth.
30901 Changes in version 0.1.2.7-alpha - 2007-02-06
30902 o Major bugfixes (rate limiting):
30903 - Servers decline directory requests much more aggressively when
30904 they're low on bandwidth. Otherwise they end up queueing more and
30905 more directory responses, which can't be good for latency.
30906 - But never refuse directory requests from local addresses.
30907 - Fix a memory leak when sending a 503 response for a networkstatus
30909 - Be willing to read or write on local connections (e.g. controller
30910 connections) even when the global rate limiting buckets are empty.
30911 - If our system clock jumps back in time, don't publish a negative
30912 uptime in the descriptor. Also, don't let the global rate limiting
30913 buckets go absurdly negative.
30914 - Flush local controller connection buffers periodically as we're
30915 writing to them, so we avoid queueing 4+ megabytes of data before
30918 o Major bugfixes (NT services):
30919 - Install as NT_AUTHORITY\LocalService rather than as SYSTEM; add a
30920 command-line flag so that admins can override the default by saying
30921 "tor --service install --user "SomeUser"". This will not affect
30922 existing installed services. Also, warn the user that the service
30923 will look for its configuration file in the service user's
30924 %appdata% directory. (We can't do the 'hardwire the user's appdata
30925 directory' trick any more, since we may not have read access to that
30928 o Major bugfixes (other):
30929 - Previously, we would cache up to 16 old networkstatus documents
30930 indefinitely, if they came from nontrusted authorities. Now we
30931 discard them if they are more than 10 days old.
30932 - Fix a crash bug in the presence of DNS hijacking (reported by Andrew
30934 - Detect and reject malformed DNS responses containing circular
30936 - If exits are rare enough that we're not marking exits as guards,
30937 ignore exit bandwidth when we're deciding the required bandwidth
30939 - When we're handling a directory connection tunneled over Tor,
30940 don't fill up internal memory buffers with all the data we want
30941 to tunnel; instead, only add it if the OR connection that will
30942 eventually receive it has some room for it. (This can lead to
30943 slowdowns in tunneled dir connections; a better solution will have
30944 to wait for 0.2.0.)
30946 o Minor bugfixes (dns):
30947 - Add some defensive programming to eventdns.c in an attempt to catch
30948 possible memory-stomping bugs.
30949 - Detect and reject DNS replies containing IPv4 or IPv6 records with
30950 an incorrect number of bytes. (Previously, we would ignore the
30952 - Fix as-yet-unused reverse IPv6 lookup code so it sends nybbles
30953 in the correct order, and doesn't crash.
30954 - Free memory held in recently-completed DNS lookup attempts on exit.
30955 This was not a memory leak, but may have been hiding memory leaks.
30956 - Handle TTL values correctly on reverse DNS lookups.
30957 - Treat failure to parse resolv.conf as an error.
30959 o Minor bugfixes (other):
30960 - Fix crash with "tor --list-fingerprint" (reported by seeess).
30961 - When computing clock skew from directory HTTP headers, consider what
30962 time it was when we finished asking for the directory, not what
30964 - Expire socks connections if they spend too long waiting for the
30965 handshake to finish. Previously we would let them sit around for
30966 days, if the connecting application didn't close them either.
30967 - And if the socks handshake hasn't started, don't send a
30968 "DNS resolve socks failed" handshake reply; just close it.
30969 - Stop using C functions that OpenBSD's linker doesn't like.
30970 - Don't launch requests for descriptors unless we have networkstatuses
30971 from at least half of the authorities. This delays the first
30972 download slightly under pathological circumstances, but can prevent
30973 us from downloading a bunch of descriptors we don't need.
30974 - Do not log IPs with TLS failures for incoming TLS
30975 connections. (Fixes bug 382.)
30976 - If the user asks to use invalid exit nodes, be willing to use
30978 - Stop using the reserved ac_cv namespace in our configure script.
30979 - Call stat() slightly less often; use fstat() when possible.
30980 - Refactor the way we handle pending circuits when an OR connection
30981 completes or fails, in an attempt to fix a rare crash bug.
30982 - Only rewrite a conn's address based on X-Forwarded-For: headers
30983 if it's a parseable public IP address; and stop adding extra quotes
30984 to the resulting address.
30987 - Weight directory requests by advertised bandwidth. Now we can
30988 let servers enable write limiting but still allow most clients to
30989 succeed at their directory requests. (We still ignore weights when
30990 choosing a directory authority; I hope this is a feature.)
30993 - Create a new file ReleaseNotes which was the old ChangeLog. The
30994 new ChangeLog file now includes the summaries for all development
30996 - Check for addresses with invalid characters at the exit as well
30997 as at the client, and warn less verbosely when they fail. You can
30998 override this by setting ServerDNSAllowNonRFC953Addresses to 1.
30999 - Adapt a patch from goodell to let the contrib/exitlist script
31000 take arguments rather than require direct editing.
31001 - Inform the server operator when we decide not to advertise a
31002 DirPort due to AccountingMax enabled or a low BandwidthRate. It
31003 was confusing Zax, so now we're hopefully more helpful.
31004 - Bring us one step closer to being able to establish an encrypted
31005 directory tunnel without knowing a descriptor first. Still not
31006 ready yet. As part of the change, now assume we can use a
31007 create_fast cell if we don't know anything about a router.
31008 - Allow exit nodes to use nameservers running on ports other than 53.
31009 - Servers now cache reverse DNS replies.
31010 - Add an --ignore-missing-torrc command-line option so that we can
31011 get the "use sensible defaults if the configuration file doesn't
31012 exist" behavior even when specifying a torrc location on the command
31015 o Minor features (controller):
31016 - Track reasons for OR connection failure; make these reasons
31017 available via the controller interface. (Patch from Mike Perry.)
31018 - Add a SOCKS_BAD_HOSTNAME client status event so controllers
31019 can learn when clients are sending malformed hostnames to Tor.
31020 - Clean up documentation for controller status events.
31021 - Add a REMAP status to stream events to note that a stream's
31022 address has changed because of a cached address or a MapAddress
31026 Changes in version 0.1.2.6-alpha - 2007-01-09
31028 - Fix an assert error introduced in 0.1.2.5-alpha: if a single TLS
31029 connection handles more than 4 gigs in either direction, we crash.
31030 - Fix an assert error introduced in 0.1.2.5-alpha: if we're an
31031 advertised exit node, somebody might try to exit from us when
31032 we're bootstrapping and before we've built our descriptor yet.
31033 Refuse the connection rather than crashing.
31036 - Warn if we (as a server) find that we've resolved an address that we
31037 weren't planning to resolve.
31038 - Warn that using select() on any libevent version before 1.1 will be
31039 unnecessarily slow (even for select()).
31040 - Flush ERR-level controller status events just like we currently
31041 flush ERR-level log events, so that a Tor shutdown doesn't prevent
31042 the controller from learning about current events.
31044 o Minor features (more controller status events):
31045 - Implement EXTERNAL_ADDRESS server status event so controllers can
31046 learn when our address changes.
31047 - Implement BAD_SERVER_DESCRIPTOR server status event so controllers
31048 can learn when directories reject our descriptor.
31049 - Implement SOCKS_UNKNOWN_PROTOCOL client status event so controllers
31050 can learn when a client application is speaking a non-socks protocol
31052 - Implement DANGEROUS_SOCKS client status event so controllers
31053 can learn when a client application is leaking DNS addresses.
31054 - Implement BUG general status event so controllers can learn when
31055 Tor is unhappy about its internal invariants.
31056 - Implement CLOCK_SKEW general status event so controllers can learn
31057 when Tor thinks the system clock is set incorrectly.
31058 - Implement GOOD_SERVER_DESCRIPTOR and ACCEPTED_SERVER_DESCRIPTOR
31059 server status events so controllers can learn when their descriptors
31060 are accepted by a directory.
31061 - Implement CHECKING_REACHABILITY and REACHABILITY_{SUCCEEDED|FAILED}
31062 server status events so controllers can learn about Tor's progress in
31063 deciding whether it's reachable from the outside.
31064 - Implement BAD_LIBEVENT general status event so controllers can learn
31065 when we have a version/method combination in libevent that needs to
31067 - Implement NAMESERVER_STATUS, NAMESERVER_ALL_DOWN, DNS_HIJACKED,
31068 and DNS_USELESS server status events so controllers can learn
31069 about changes to DNS server status.
31071 o Minor features (directory):
31072 - Authorities no longer recommend exits as guards if this would shift
31073 too much load to the exit nodes.
31076 Changes in version 0.1.2.5-alpha - 2007-01-06
31078 - Enable write limiting as well as read limiting. Now we sacrifice
31079 capacity if we're pushing out lots of directory traffic, rather
31080 than overrunning the user's intended bandwidth limits.
31081 - Include TLS overhead when counting bandwidth usage; previously, we
31082 would count only the bytes sent over TLS, but not the bytes used
31084 - Support running the Tor service with a torrc not in the same
31085 directory as tor.exe and default to using the torrc located in
31086 the %appdata%\Tor\ of the user who installed the service. Patch
31088 - Servers now check for the case when common DNS requests are going to
31089 wildcarded addresses (i.e. all getting the same answer), and change
31090 their exit policy to reject *:* if it's happening.
31091 - Implement BEGIN_DIR cells, so we can connect to the directory
31092 server via TLS to do encrypted directory requests rather than
31093 plaintext. Enable via the TunnelDirConns and PreferTunneledDirConns
31094 config options if you like.
31096 o Minor features (config and docs):
31097 - Start using the state file to store bandwidth accounting data:
31098 the bw_accounting file is now obsolete. We'll keep generating it
31099 for a while for people who are still using 0.1.2.4-alpha.
31100 - Try to batch changes to the state file so that we do as few
31101 disk writes as possible while still storing important things in
31103 - The state file and the bw_accounting file get saved less often when
31104 the AvoidDiskWrites config option is set.
31105 - Make PIDFile work on Windows (untested).
31106 - Add internal descriptions for a bunch of configuration options:
31107 accessible via controller interface and in comments in saved
31109 - Reject *:563 (NNTPS) in the default exit policy. We already reject
31110 NNTP by default, so this seems like a sensible addition.
31111 - Clients now reject hostnames with invalid characters. This should
31112 avoid some inadvertent info leaks. Add an option
31113 AllowNonRFC953Hostnames to disable this behavior, in case somebody
31114 is running a private network with hosts called @, !, and #.
31115 - Add a maintainer script to tell us which options are missing
31116 documentation: "make check-docs".
31117 - Add a new address-spec.txt document to describe our special-case
31118 addresses: .exit, .onion, and .noconnnect.
31120 o Minor features (DNS):
31121 - Ongoing work on eventdns infrastructure: now it has dns server
31122 and ipv6 support. One day Tor will make use of it.
31123 - Add client-side caching for reverse DNS lookups.
31124 - Add support to tor-resolve tool for reverse lookups and SOCKS5.
31125 - When we change nameservers or IP addresses, reset and re-launch
31126 our tests for DNS hijacking.
31128 o Minor features (directory):
31129 - Authorities now specify server versions in networkstatus. This adds
31130 about 2% to the size of compressed networkstatus docs, and allows
31131 clients to tell which servers support BEGIN_DIR and which don't.
31132 The implementation is forward-compatible with a proposed future
31133 protocol version scheme not tied to Tor versions.
31134 - DirServer configuration lines now have an orport= option so
31135 clients can open encrypted tunnels to the authorities without
31136 having downloaded their descriptors yet. Enabled for moria1,
31137 moria2, tor26, and lefkada now in the default configuration.
31138 - Directory servers are more willing to send a 503 "busy" if they
31139 are near their write limit, especially for v1 directory requests.
31140 Now they can use their limited bandwidth for actual Tor traffic.
31141 - Clients track responses with status 503 from dirservers. After a
31142 dirserver has given us a 503, we try not to use it until an hour has
31143 gone by, or until we have no dirservers that haven't given us a 503.
31144 - When we get a 503 from a directory, and we're not a server, we don't
31145 count the failure against the total number of failures allowed
31146 for the thing we're trying to download.
31147 - Report X-Your-Address-Is correctly from tunneled directory
31148 connections; don't report X-Your-Address-Is when it's an internal
31149 address; and never believe reported remote addresses when they're
31151 - Protect against an unlikely DoS attack on directory servers.
31152 - Add a BadDirectory flag to network status docs so that authorities
31153 can (eventually) tell clients about caches they believe to be
31156 o Minor features (controller):
31157 - Have GETINFO dir/status/* work on hosts with DirPort disabled.
31158 - Reimplement GETINFO so that info/names stays in sync with the
31160 - Implement "GETINFO fingerprint".
31161 - Implement "SETEVENTS GUARD" so controllers can get updates on
31162 entry guard status as it changes.
31164 o Minor features (clean up obsolete pieces):
31165 - Remove some options that have been deprecated since at least
31166 0.1.0.x: AccountingMaxKB, LogFile, DebugLogFile, LogLevel, and
31167 SysLog. Use AccountingMax instead of AccountingMaxKB, and use Log
31168 to set log options.
31169 - We no longer look for identity and onion keys in "identity.key" and
31170 "onion.key" -- these were replaced by secret_id_key and
31171 secret_onion_key in 0.0.8pre1.
31172 - We no longer require unrecognized directory entries to be
31175 o Major bugfixes (security):
31176 - Stop sending the HttpProxyAuthenticator string to directory
31177 servers when directory connections are tunnelled through Tor.
31178 - Clients no longer store bandwidth history in the state file.
31179 - Do not log introduction points for hidden services if SafeLogging
31181 - When generating bandwidth history, round down to the nearest
31182 1k. When storing accounting data, round up to the nearest 1k.
31183 - When we're running as a server, remember when we last rotated onion
31184 keys, so that we will rotate keys once they're a week old even if
31185 we never stay up for a week ourselves.
31187 o Major bugfixes (other):
31188 - Fix a longstanding bug in eventdns that prevented the count of
31189 timed-out resolves from ever being reset. This bug caused us to
31190 give up on a nameserver the third time it timed out, and try it
31191 10 seconds later... and to give up on it every time it timed out
31193 - Take out the '5 second' timeout from the connection retry
31194 schedule. Now the first connect attempt will wait a full 10
31195 seconds before switching to a new circuit. Perhaps this will help
31196 a lot. Based on observations from Mike Perry.
31197 - Fix a bug on the Windows implementation of tor_mmap_file() that
31198 would prevent the cached-routers file from ever loading. Reported
31202 - Fix an assert failure when a directory authority sets
31203 AuthDirRejectUnlisted and then receives a descriptor from an
31204 unlisted router. Reported by seeess.
31205 - Avoid a double-free when parsing malformed DirServer lines.
31206 - Fix a bug when a BSD-style PF socket is first used. Patch from
31208 - Fix a bug in 0.1.2.2-alpha that prevented clients from asking
31209 to resolve an address at a given exit node even when they ask for
31211 - Servers no longer ever list themselves in their "family" line,
31212 even if configured to do so. This makes it easier to configure
31213 family lists conveniently.
31214 - When running as a server, don't fall back to 127.0.0.1 when no
31215 nameservers are configured in /etc/resolv.conf; instead, make the
31216 user fix resolv.conf or specify nameservers explicitly. (Resolves
31218 - Stop accepting certain malformed ports in configured exit policies.
31219 - Don't re-write the fingerprint file every restart, unless it has
31221 - Stop warning when a single nameserver fails: only warn when _all_ of
31222 our nameservers have failed. Also, when we only have one nameserver,
31223 raise the threshold for deciding that the nameserver is dead.
31224 - Directory authorities now only decide that routers are reachable
31225 if their identity keys are as expected.
31226 - When the user uses bad syntax in the Log config line, stop
31227 suggesting other bad syntax as a replacement.
31228 - Correctly detect ipv6 DNS capability on OpenBSD.
31230 o Minor bugfixes (controller):
31231 - Report the circuit number correctly in STREAM CLOSED events. Bug
31232 reported by Mike Perry.
31233 - Do not report bizarre values for results of accounting GETINFOs
31234 when the last second's write or read exceeds the allotted bandwidth.
31235 - Report "unrecognized key" rather than an empty string when the
31236 controller tries to fetch a networkstatus that doesn't exist.
31239 Changes in version 0.1.1.26 - 2006-12-14
31240 o Security bugfixes:
31241 - Stop sending the HttpProxyAuthenticator string to directory
31242 servers when directory connections are tunnelled through Tor.
31243 - Clients no longer store bandwidth history in the state file.
31244 - Do not log introduction points for hidden services if SafeLogging
31248 - Fix an assert failure when a directory authority sets
31249 AuthDirRejectUnlisted and then receives a descriptor from an
31250 unlisted router (reported by seeess).
31253 Changes in version 0.1.2.4-alpha - 2006-12-03
31255 - Add support for using natd; this allows FreeBSDs earlier than
31256 5.1.2 to have ipfw send connections through Tor without using
31257 SOCKS. (Patch from Zajcev Evgeny with tweaks from tup.)
31260 - Make all connections to addresses of the form ".noconnect"
31261 immediately get closed. This lets application/controller combos
31262 successfully test whether they're talking to the same Tor by
31263 watching for STREAM events.
31264 - Make cross.sh cross-compilation script work even when autogen.sh
31265 hasn't been run. (Patch from Michael Mohr.)
31266 - Statistics dumped by -USR2 now include a breakdown of public key
31267 operations, for profiling.
31270 - Fix a major leak when directory authorities parse their
31271 approved-routers list, a minor memory leak when we fail to pick
31272 an exit node, and a few rare leaks on errors.
31273 - Handle TransPort connections even when the server sends data before
31274 the client sends data. Previously, the connection would just hang
31275 until the client sent data. (Patch from tup based on patch from
31277 - Avoid assert failure when our cached-routers file is empty on
31281 - Don't log spurious warnings when we see a circuit close reason we
31282 don't recognize; it's probably just from a newer version of Tor.
31283 - Have directory authorities allow larger amounts of drift in uptime
31284 without replacing the server descriptor: previously, a server that
31285 restarted every 30 minutes could have 48 "interesting" descriptors
31287 - Start linking to the Tor specification and Tor reference manual
31288 correctly in the Windows installer.
31289 - Add Vidalia to the OS X uninstaller script, so when we uninstall
31290 Tor/Privoxy we also uninstall Vidalia.
31291 - Resume building on Irix64, and fix a lot of warnings from its
31292 MIPSpro C compiler.
31293 - Don't corrupt last_guessed_ip in router_new_address_suggestion()
31294 when we're running as a client.
31297 Changes in version 0.1.1.25 - 2006-11-04
31299 - When a client asks us to resolve (rather than connect to)
31300 an address, and we have a cached answer, give them the cached
31301 answer. Previously, we would give them no answer at all.
31302 - We were building exactly the wrong circuits when we predict
31303 hidden service requirements, meaning Tor would have to build all
31304 its circuits on demand.
31305 - If none of our live entry guards have a high uptime, but we
31306 require a guard with a high uptime, try adding a new guard before
31307 we give up on the requirement. This patch should make long-lived
31308 connections more stable on average.
31309 - When testing reachability of our DirPort, don't launch new
31310 tests when there's already one in progress -- unreachable
31311 servers were stacking up dozens of testing streams.
31313 o Security bugfixes:
31314 - When the user sends a NEWNYM signal, clear the client-side DNS
31315 cache too. Otherwise we continue to act on previous information.
31318 - Avoid a memory corruption bug when creating a hash table for
31320 - Avoid possibility of controller-triggered crash when misusing
31321 certain commands from a v0 controller on platforms that do not
31322 handle printf("%s",NULL) gracefully.
31323 - Avoid infinite loop on unexpected controller input.
31324 - Don't log spurious warnings when we see a circuit close reason we
31325 don't recognize; it's probably just from a newer version of Tor.
31326 - Add Vidalia to the OS X uninstaller script, so when we uninstall
31327 Tor/Privoxy we also uninstall Vidalia.
31330 Changes in version 0.1.2.3-alpha - 2006-10-29
31332 - Prepare for servers to publish descriptors less often: never
31333 discard a descriptor simply for being too old until either it is
31334 recommended by no authorities, or until we get a better one for
31335 the same router. Make caches consider retaining old recommended
31336 routers for even longer.
31337 - If most authorities set a BadExit flag for a server, clients
31338 don't think of it as a general-purpose exit. Clients only consider
31339 authorities that advertise themselves as listing bad exits.
31340 - Directory servers now provide 'Pragma: no-cache' and 'Expires'
31341 headers for content, so that we can work better in the presence of
31342 caching HTTP proxies.
31343 - Allow authorities to list nodes as bad exits by fingerprint or by
31346 o Minor features, controller:
31347 - Add a REASON field to CIRC events; for backward compatibility, this
31348 field is sent only to controllers that have enabled the extended
31349 event format. Also, add additional reason codes to explain why
31350 a given circuit has been destroyed or truncated. (Patches from
31352 - Add a REMOTE_REASON field to extended CIRC events to tell the
31353 controller about why a remote OR told us to close a circuit.
31354 - Stream events also now have REASON and REMOTE_REASON fields,
31355 working much like those for circuit events.
31356 - There's now a GETINFO ns/... field so that controllers can ask Tor
31357 about the current status of a router.
31358 - A new event type "NS" to inform a controller when our opinion of
31359 a router's status has changed.
31360 - Add a GETINFO events/names and GETINFO features/names so controllers
31361 can tell which events and features are supported.
31362 - A new CLEARDNSCACHE signal to allow controllers to clear the
31363 client-side DNS cache without expiring circuits.
31365 o Security bugfixes:
31366 - When the user sends a NEWNYM signal, clear the client-side DNS
31367 cache too. Otherwise we continue to act on previous information.
31370 - Avoid sending junk to controllers or segfaulting when a controller
31371 uses EVENT_NEW_DESC with verbose nicknames.
31372 - Stop triggering asserts if the controller tries to extend hidden
31373 service circuits (reported by mwenge).
31374 - Avoid infinite loop on unexpected controller input.
31375 - When the controller does a "GETINFO network-status", tell it
31376 about even those routers whose descriptors are very old, and use
31377 long nicknames where appropriate.
31378 - Change NT service functions to be loaded on demand. This lets us
31379 build with MinGW without breaking Tor for Windows 98 users.
31380 - Do DirPort reachability tests less often, since a single test
31381 chews through many circuits before giving up.
31382 - In the hidden service example in torrc.sample, stop recommending
31383 esoteric and discouraged hidden service options.
31384 - When stopping an NT service, wait up to 10 sec for it to actually
31385 stop. Patch from Matt Edman; resolves bug 295.
31386 - Fix handling of verbose nicknames with ORCONN controller events:
31387 make them show up exactly when requested, rather than exactly when
31389 - When reporting verbose nicknames in entry_guards_getinfo(), avoid
31390 printing a duplicate "$" in the keys we send (reported by mwenge).
31391 - Correctly set maximum connection limit on Cygwin. (This time
31393 - Try to detect Windows correctly when cross-compiling.
31394 - Detect the size of the routers file correctly even if it is
31395 corrupted (on systems without mmap) or not page-aligned (on systems
31396 with mmap). This bug was harmless.
31397 - Sometimes we didn't bother sending a RELAY_END cell when an attempt
31398 to open a stream fails; now we do in more cases. This should
31399 make clients able to find a good exit faster in some cases, since
31400 unhandleable requests will now get an error rather than timing out.
31401 - Resolve two memory leaks when rebuilding the on-disk router cache
31402 (reported by fookoowa).
31403 - Clean up minor code warnings suggested by the MIPSpro C compiler,
31404 and reported by some Centos users.
31405 - Controller signals now work on non-Unix platforms that don't define
31406 SIGUSR1 and SIGUSR2 the way we expect.
31407 - Patch from Michael Mohr to contrib/cross.sh, so it checks more
31408 values before failing, and always enables eventdns.
31409 - Libevent-1.2 exports, but does not define in its headers, strlcpy.
31410 Try to fix this in configure.in by checking for most functions
31411 before we check for libevent.
31414 Changes in version 0.1.2.2-alpha - 2006-10-07
31416 - Make our async eventdns library on-by-default for Tor servers,
31417 and plan to deprecate the separate dnsworker threads.
31418 - Add server-side support for "reverse" DNS lookups (using PTR
31419 records so clients can determine the canonical hostname for a given
31420 IPv4 address). Only supported by servers using eventdns; servers
31421 now announce in their descriptors whether they support eventdns.
31422 - Specify and implement client-side SOCKS5 interface for reverse DNS
31423 lookups (see doc/socks-extensions.txt).
31424 - Add a BEGIN_DIR relay cell type for an easier in-protocol way to
31425 connect to directory servers through Tor. Previously, clients needed
31426 to find Tor exits to make private connections to directory servers.
31427 - Avoid choosing Exit nodes for entry or middle hops when the
31428 total bandwidth available from non-Exit nodes is much higher than
31429 the total bandwidth available from Exit nodes.
31430 - Workaround for name servers (like Earthlink's) that hijack failing
31431 DNS requests and replace the no-such-server answer with a "helpful"
31432 redirect to an advertising-driven search portal. Also work around
31433 DNS hijackers who "helpfully" decline to hijack known-invalid
31434 RFC2606 addresses. Config option "ServerDNSDetectHijacking 0"
31435 lets you turn it off.
31436 - Send out a burst of long-range padding cells once we've established
31437 that we're reachable. Spread them over 4 circuits, so hopefully
31438 a few will be fast. This exercises our bandwidth and bootstraps
31439 us into the directory more quickly.
31441 o New/improved config options:
31442 - Add new config option "ResolvConf" to let the server operator
31443 choose an alternate resolve.conf file when using eventdns.
31444 - Add an "EnforceDistinctSubnets" option to control our "exclude
31445 servers on the same /16" behavior. It's still on by default; this
31446 is mostly for people who want to operate private test networks with
31447 all the machines on the same subnet.
31448 - If one of our entry guards is on the ExcludeNodes list, or the
31449 directory authorities don't think it's a good guard, treat it as
31450 if it were unlisted: stop using it as a guard, and throw it off
31451 the guards list if it stays that way for a long time.
31452 - Allow directory authorities to be marked separately as authorities
31453 for the v1 directory protocol, the v2 directory protocol, and
31454 as hidden service directories, to make it easier to retire old
31455 authorities. V1 authorities should set "HSAuthoritativeDir 1"
31456 to continue being hidden service authorities too.
31457 - Remove 8888 as a LongLivedPort, and add 6697 (IRCS).
31459 o Minor features, controller:
31460 - Fix CIRC controller events so that controllers can learn the
31461 identity digests of non-Named servers used in circuit paths.
31462 - Let controllers ask for more useful identifiers for servers. Instead
31463 of learning identity digests for un-Named servers and nicknames
31464 for Named servers, the new identifiers include digest, nickname,
31465 and indication of Named status. Off by default; see control-spec.txt
31466 for more information.
31467 - Add a "getinfo address" controller command so it can display Tor's
31468 best guess to the user.
31469 - New controller event to alert the controller when our server
31470 descriptor has changed.
31471 - Give more meaningful errors on controller authentication failure.
31473 o Minor features, other:
31474 - When asked to resolve a hostname, don't use non-exit servers unless
31475 requested to do so. This allows servers with broken DNS to be
31476 useful to the network.
31477 - Divide eventdns log messages into warn and info messages.
31478 - Reserve the nickname "Unnamed" for routers that can't pick
31479 a hostname: any router can call itself Unnamed; directory
31480 authorities will never allocate Unnamed to any particular router;
31481 clients won't believe that any router is the canonical Unnamed.
31482 - Only include function names in log messages for info/debug messages.
31483 For notice/warn/err, the content of the message should be clear on
31484 its own, and printing the function name only confuses users.
31485 - Avoid some false positives during reachability testing: don't try
31486 to test via a server that's on the same /24 as us.
31487 - If we fail to build a circuit to an intended enclave, and it's
31488 not mandatory that we use that enclave, stop wanting it.
31489 - When eventdns is enabled, allow multithreaded builds on NetBSD and
31490 OpenBSD. (We had previously disabled threads on these platforms
31491 because they didn't have working thread-safe resolver functions.)
31493 o Major bugfixes, anonymity/security:
31494 - If a client asked for a server by name, and there's a named server
31495 in our network-status but we don't have its descriptor yet, we
31496 could return an unnamed server instead.
31497 - Fix NetBSD bug that could allow someone to force uninitialized RAM
31498 to be sent to a server's DNS resolver. This only affects NetBSD
31499 and other platforms that do not bounds-check tolower().
31500 - Reject (most) attempts to use Tor circuits with length one. (If
31501 many people start using Tor as a one-hop proxy, exit nodes become
31502 a more attractive target for compromise.)
31503 - Just because your DirPort is open doesn't mean people should be
31504 able to remotely teach you about hidden service descriptors. Now
31505 only accept rendezvous posts if you've got HSAuthoritativeDir set.
31507 o Major bugfixes, other:
31508 - Don't crash on race condition in dns.c: tor_assert(!resolve->expire)
31509 - When a client asks the server to resolve (not connect to)
31510 an address, and it has a cached answer, give them the cached answer.
31511 Previously, the server would give them no answer at all.
31512 - Allow really slow clients to not hang up five minutes into their
31513 directory downloads (suggested by Adam J. Richter).
31514 - We were building exactly the wrong circuits when we anticipated
31515 hidden service requirements, meaning Tor would have to build all
31516 its circuits on demand.
31517 - Avoid crashing when we mmap a router cache file of size 0.
31518 - When testing reachability of our DirPort, don't launch new
31519 tests when there's already one in progress -- unreachable
31520 servers were stacking up dozens of testing streams.
31522 o Minor bugfixes, correctness:
31523 - If we're a directory mirror and we ask for "all" network status
31524 documents, we would discard status documents from authorities
31525 we don't recognize.
31526 - Avoid a memory corruption bug when creating a hash table for
31528 - Avoid controller-triggered crash when misusing certain commands
31529 from a v0 controller on platforms that do not handle
31530 printf("%s",NULL) gracefully.
31531 - Don't crash when a controller sends a third argument to an
31532 "extendcircuit" request.
31533 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
31534 response; fix error code when "getinfo dir/status/" fails.
31535 - Avoid crash when telling controller stream-status and a stream
31537 - Patch from Adam Langley to fix assert() in eventdns.c.
31538 - Fix a debug log message in eventdns to say "X resolved to Y"
31539 instead of "X resolved to X".
31540 - Make eventdns give strings for DNS errors, not just error numbers.
31541 - Track unreachable entry guards correctly: don't conflate
31542 'unreachable by us right now' with 'listed as down by the directory
31543 authorities'. With the old code, if a guard was unreachable by
31544 us but listed as running, it would clog our guard list forever.
31545 - Behave correctly in case we ever have a network with more than
31546 2GB/s total advertised capacity.
31547 - Make TrackExitHosts case-insensitive, and fix the behavior of
31548 ".suffix" TrackExitHosts items to avoid matching in the middle of
31550 - Finally fix the openssl warnings from newer gccs that believe that
31551 ignoring a return value is okay, but casting a return value and
31552 then ignoring it is a sign of madness.
31553 - Prevent the contrib/exitlist script from printing the same
31554 result more than once.
31555 - Patch from Steve Hildrey: Generate network status correctly on
31556 non-versioning dirservers.
31557 - Don't listen to the X-Your-Address-Is hint if you did the lookup
31558 via Tor; otherwise you'll think you're the exit node's IP address.
31560 o Minor bugfixes, performance:
31561 - Two small performance improvements on parsing descriptors.
31562 - Major performance improvement on inserting descriptors: change
31563 algorithm from O(n^2) to O(n).
31564 - Make the common memory allocation path faster on machines where
31565 malloc(0) returns a pointer.
31566 - Start remembering X-Your-Address-Is directory hints even if you're
31567 a client, so you can become a server more smoothly.
31568 - Avoid duplicate entries on MyFamily line in server descriptor.
31570 o Packaging, features:
31571 - Remove architecture from OS X builds. The official builds are
31572 now universal binaries.
31573 - The Debian package now uses --verify-config when (re)starting,
31574 to distinguish configuration errors from other errors.
31575 - Update RPMs to require libevent 1.1b.
31577 o Packaging, bugfixes:
31578 - Patches so Tor builds with MinGW on Windows.
31579 - Patches so Tor might run on Cygwin again.
31580 - Resume building on non-gcc compilers and ancient gcc. Resume
31581 building with the -O0 compile flag. Resume building cleanly on
31583 - Run correctly on OS X platforms with case-sensitive filesystems.
31584 - Correct includes for net/if.h and net/pfvar.h on OpenBSD (from Tup).
31585 - Add autoconf checks so Tor can build on Solaris x86 again.
31588 - Documented (and renamed) ServerDNSSearchDomains and
31589 ServerDNSResolvConfFile options.
31590 - Be clearer that the *ListenAddress directives can be repeated
31594 Changes in version 0.1.1.24 - 2006-09-29
31596 - Allow really slow clients to not hang up five minutes into their
31597 directory downloads (suggested by Adam J. Richter).
31598 - Fix major performance regression from 0.1.0.x: instead of checking
31599 whether we have enough directory information every time we want to
31600 do something, only check when the directory information has changed.
31601 This should improve client CPU usage by 25-50%.
31602 - Don't crash if, after a server has been running for a while,
31603 it can't resolve its hostname.
31606 - Allow Tor to start when RunAsDaemon is set but no logs are set.
31607 - Don't crash when the controller receives a third argument to an
31608 "extendcircuit" request.
31609 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
31610 response; fix error code when "getinfo dir/status/" fails.
31611 - Fix configure.in to not produce broken configure files with
31612 more recent versions of autoconf. Thanks to Clint for his auto*
31614 - Fix security bug on NetBSD that could allow someone to force
31615 uninitialized RAM to be sent to a server's DNS resolver. This
31616 only affects NetBSD and other platforms that do not bounds-check
31618 - Warn user when using libevent 1.1a or earlier with win32 or kqueue
31619 methods: these are known to be buggy.
31620 - If we're a directory mirror and we ask for "all" network status
31621 documents, we would discard status documents from authorities
31622 we don't recognize.
31625 Changes in version 0.1.2.1-alpha - 2006-08-27
31627 - Add "eventdns" async dns library from Adam Langley, tweaked to
31628 build on OSX and Windows. Only enabled if you pass the
31629 --enable-eventdns argument to configure.
31630 - Allow servers with no hostname or IP address to learn their
31631 IP address by asking the directory authorities. This code only
31632 kicks in when you would normally have exited with a "no address"
31633 error. Nothing's authenticated, so use with care.
31634 - Rather than waiting a fixed amount of time between retrying
31635 application connections, we wait only 5 seconds for the first,
31636 10 seconds for the second, and 15 seconds for each retry after
31637 that. Hopefully this will improve the expected user experience.
31638 - Patch from Tup to add support for transparent AP connections:
31639 this basically bundles the functionality of trans-proxy-tor
31640 into the Tor mainline. Now hosts with compliant pf/netfilter
31641 implementations can redirect TCP connections straight to Tor
31642 without diverting through SOCKS. Needs docs.
31643 - Busy directory servers save lots of memory by spooling server
31644 descriptors, v1 directories, and v2 networkstatus docs to buffers
31645 as needed rather than en masse. Also mmap the cached-routers
31646 files, so we don't need to keep the whole thing in memory too.
31647 - Automatically avoid picking more than one node from the same
31648 /16 network when constructing a circuit.
31649 - Revise and clean up the torrc.sample that we ship with; add
31650 a section for BandwidthRate and BandwidthBurst.
31653 - Split circuit_t into origin_circuit_t and or_circuit_t, and
31654 split connection_t into edge, or, dir, control, and base structs.
31655 These will save quite a bit of memory on busy servers, and they'll
31656 also help us track down bugs in the code and bugs in the spec.
31657 - Experimentally re-enable kqueue on OSX when using libevent 1.1b
31658 or later. Log when we are doing this, so we can diagnose it when
31659 it fails. (Also, recommend libevent 1.1b for kqueue and
31660 win32 methods; deprecate libevent 1.0b harder; make libevent
31661 recommendation system saner.)
31662 - Start being able to build universal binaries on OS X (thanks
31664 - Export the default exit policy via the control port, so controllers
31665 don't need to guess what it is / will be later.
31666 - Add a man page entry for ProtocolWarnings.
31667 - Add TestVia config option to the man page.
31668 - Remove even more protocol-related warnings from Tor server logs,
31669 such as bad TLS handshakes and malformed begin cells.
31670 - Stop fetching descriptors if you're not a dir mirror and you
31671 haven't tried to establish any circuits lately. [This currently
31672 causes some dangerous behavior, because when you start up again
31673 you'll use your ancient server descriptors.]
31674 - New DirPort behavior: if you have your dirport set, you download
31675 descriptors aggressively like a directory mirror, whether or not
31676 your ORPort is set.
31677 - Get rid of the router_retry_connections notion. Now routers
31678 no longer try to rebuild long-term connections to directory
31679 authorities, and directory authorities no longer try to rebuild
31680 long-term connections to all servers. We still don't hang up
31681 connections in these two cases though -- we need to look at it
31682 more carefully to avoid flapping, and we likely need to wait til
31683 0.1.1.x is obsolete.
31684 - Drop compatibility with obsolete Tors that permit create cells
31685 to have the wrong circ_id_type.
31686 - Re-enable per-connection rate limiting. Get rid of the "OP
31687 bandwidth" concept. Lay groundwork for "bandwidth classes" --
31688 separate global buckets that apply depending on what sort of conn
31690 - Start publishing one minute or so after we find our ORPort
31691 to be reachable. This will help reduce the number of descriptors
31692 we have for ourselves floating around, since it's quite likely
31693 other things (e.g. DirPort) will change during that minute too.
31694 - Fork the v1 directory protocol into its own spec document,
31695 and mark dir-spec.txt as the currently correct (v2) spec.
31698 - When we find our DirPort to be reachable, publish a new descriptor
31699 so we'll tell the world (reported by pnx).
31700 - Publish a new descriptor after we hup/reload. This is important
31701 if our config has changed such that we'll want to start advertising
31702 our DirPort now, etc.
31703 - Allow Tor to start when RunAsDaemon is set but no logs are set.
31704 - When we have a state file we cannot parse, tell the user and
31705 move it aside. Now we avoid situations where the user starts
31706 Tor in 1904, Tor writes a state file with that timestamp in it,
31707 the user fixes her clock, and Tor refuses to start.
31708 - Fix configure.in to not produce broken configure files with
31709 more recent versions of autoconf. Thanks to Clint for his auto*
31711 - "tor --verify-config" now exits with -1(255) or 0 depending on
31712 whether the config options are bad or good.
31713 - Resolve bug 321 when using dnsworkers: append a period to every
31714 address we resolve at the exit node, so that we do not accidentally
31715 pick up local addresses, and so that failing searches are retried
31716 in the resolver search domains. (This is already solved for
31717 eventdns.) (This breaks Blossom servers for now.)
31718 - If we are using an exit enclave and we can't connect, e.g. because
31719 its webserver is misconfigured to not listen on localhost, then
31720 back off and try connecting from somewhere else before we fail.
31723 - Start compiling on MinGW on Windows (patches from Mike Chiussi).
31724 - Start compiling on MSVC6 on Windows (patches from Frediano Ziglio).
31725 - Fix bug 314: Tor clients issued "unsafe socks" warnings even
31726 when the IP address is mapped through MapAddress to a hostname.
31727 - Start passing "ipv4" hints to getaddrinfo(), so servers don't do
31728 useless IPv6 DNS resolves.
31729 - Patch suggested by Karsten Loesing: respond to SIGNAL command
31730 before we execute the signal, in case the signal shuts us down.
31731 - Clean up AllowInvalidNodes man page entry.
31732 - Claim a commonname of Tor, rather than TOR, in TLS handshakes.
31733 - Add more asserts to track down an assert error on a windows Tor
31734 server with connection_add being called with socket == -1.
31735 - Handle reporting OR_CONN_EVENT_NEW events to the controller.
31736 - Fix misleading log messages: an entry guard that is "unlisted",
31737 as well as not known to be "down" (because we've never heard
31738 of it), is not therefore "up".
31739 - Remove code to special-case "-cvs" ending, since it has not
31740 actually mattered since 0.0.9.
31741 - Make our socks5 handling more robust to broken socks clients:
31742 throw out everything waiting on the buffer in between socks
31743 handshake phases, since they can't possibly (so the theory
31744 goes) have predicted what we plan to respond to them.
31747 Changes in version 0.1.1.23 - 2006-07-30
31749 - Fast Tor servers, especially exit nodes, were triggering asserts
31750 due to a bug in handling the list of pending DNS resolves. Some
31751 bugs still remain here; we're hunting them.
31752 - Entry guards could crash clients by sending unexpected input.
31753 - More fixes on reachability testing: if you find yourself reachable,
31754 then don't ever make any client requests (so you stop predicting
31755 circuits), then hup or have your clock jump, then later your IP
31756 changes, you won't think circuits are working, so you won't try to
31757 test reachability, so you won't publish.
31760 - Avoid a crash if the controller does a resetconf firewallports
31761 and then a setconf fascistfirewall=1.
31762 - Avoid an integer underflow when the dir authority decides whether
31763 a router is stable: we might wrongly label it stable, and compute
31764 a slightly wrong median stability, when a descriptor is published
31766 - Fix a place where we might trigger an assert if we can't build our
31767 own server descriptor yet.
31770 Changes in version 0.1.1.22 - 2006-07-05
31772 - Fix a big bug that was causing servers to not find themselves
31773 reachable if they changed IP addresses. Since only 0.1.1.22+
31774 servers can do reachability testing correctly, now we automatically
31775 make sure to test via one of these.
31776 - Fix to allow clients and mirrors to learn directory info from
31777 descriptor downloads that get cut off partway through.
31778 - Directory authorities had a bug in deciding if a newly published
31779 descriptor was novel enough to make everybody want a copy -- a few
31780 servers seem to be publishing new descriptors many times a minute.
31782 - Fix a rare bug that was causing some servers to complain about
31783 "closing wedged cpuworkers" and skip some circuit create requests.
31784 - Make the Exit flag in directory status documents actually work.
31787 Changes in version 0.1.1.21 - 2006-06-10
31788 o Crash and assert fixes from 0.1.1.20:
31789 - Fix a rare crash on Tor servers that have enabled hibernation.
31790 - Fix a seg fault on startup for Tor networks that use only one
31791 directory authority.
31792 - Fix an assert from a race condition that occurs on Tor servers
31793 while exiting, where various threads are trying to log that they're
31794 exiting, and delete the logs, at the same time.
31795 - Make our unit tests pass again on certain obscure platforms.
31798 - Add support for building SUSE RPM packages.
31799 - Speed up initial bootstrapping for clients: if we are making our
31800 first ever connection to any entry guard, then don't mark it down
31802 - When only one Tor server in the network is labelled as a guard,
31803 and we've already picked him, we would cycle endlessly picking him
31804 again, being unhappy about it, etc. Now we specifically exclude
31805 current guards when picking a new guard.
31806 - Servers send create cells more reliably after the TLS connection
31807 is established: we were sometimes forgetting to send half of them
31808 when we had more than one pending.
31809 - If we get a create cell that asks us to extend somewhere, but the
31810 Tor server there doesn't match the expected digest, we now send
31811 a destroy cell back, rather than silently doing nothing.
31812 - Make options->RedirectExit work again.
31813 - Make cookie authentication for the controller work again.
31814 - Stop being picky about unusual characters in the arguments to
31815 mapaddress. It's none of our business.
31816 - Add a new config option "TestVia" that lets you specify preferred
31817 middle hops to use for test circuits. Perhaps this will let me
31818 debug the reachability problems better.
31820 o Log / documentation fixes:
31821 - If we're a server and some peer has a broken TLS certificate, don't
31822 log about it unless ProtocolWarnings is set, i.e., we want to hear
31823 about protocol violations by others.
31824 - Fix spelling of VirtualAddrNetwork in man page.
31825 - Add a better explanation at the top of the autogenerated torrc file
31826 about what happened to our old torrc.
31829 Changes in version 0.1.1.20 - 2006-05-23
31831 - Downgrade a log severity where servers complain that they're
31833 - Avoid a compile warning on FreeBSD.
31834 - Remove string size limit on NEWDESC messages; solve bug 291.
31835 - Correct the RunAsDaemon entry in the man page; ignore RunAsDaemon
31836 more thoroughly when we're running on windows.
31839 Changes in version 0.1.1.19-rc - 2006-05-03
31841 - Regenerate our local descriptor if it's dirty and we try to use
31842 it locally (e.g. if it changes during reachability detection).
31843 - If we setconf our ORPort to 0, we continued to listen on the
31844 old ORPort and receive connections.
31845 - Avoid a second warning about machine/limits.h on Debian
31847 - Be willing to add our own routerinfo into the routerlist.
31848 Now authorities will include themselves in their directories
31849 and network-statuses.
31850 - Stop trying to upload rendezvous descriptors to every
31851 directory authority: only try the v1 authorities.
31852 - Servers no longer complain when they think they're not
31853 registered with the directory authorities. There were too many
31855 - Backport dist-rpm changes so rpms can be built without errors.
31858 - Implement an option, VirtualAddrMask, to set which addresses
31859 get handed out in response to mapaddress requests. This works
31860 around a bug in tsocks where 127.0.0.0/8 is never socksified.
31863 Changes in version 0.1.1.18-rc - 2006-04-10
31865 - Work harder to download live network-statuses from all the
31866 directory authorities we know about. Improve the threshold
31867 decision logic so we're more robust to edge cases.
31868 - When fetching rendezvous descriptors, we were willing to ask
31869 v2 authorities too, which would always return 404.
31872 - Stop listing down or invalid nodes in the v1 directory. This will
31873 reduce its bulk by about 1/3, and reduce load on directory
31875 - When deciding whether a router is Fast or Guard-worthy, consider
31876 his advertised BandwidthRate and not just the BandwidthCapacity.
31877 - No longer ship INSTALL and README files -- they are useless now.
31878 - Force rpmbuild to behave and honor target_cpu.
31879 - Avoid warnings about machine/limits.h on Debian GNU/kFreeBSD.
31880 - Start to include translated versions of the tor-doc-*.html
31881 files, along with the screenshots. Still needs more work.
31882 - Start sending back 512 and 451 errors if mapaddress fails,
31883 rather than not sending anything back at all.
31884 - When we fail to bind or listen on an incoming or outgoing
31885 socket, we should close it before failing. otherwise we just
31886 leak it. (thanks to weasel for finding.)
31887 - Allow "getinfo dir/status/foo" to work, as long as your DirPort
31888 is enabled. (This is a hack, and will be fixed in 0.1.2.x.)
31889 - Make NoPublish (even though deprecated) work again.
31890 - Fix a minor security flaw where a versioning auth dirserver
31891 could list a recommended version many times in a row to make
31892 clients more convinced that it's recommended.
31893 - Fix crash bug if there are two unregistered servers running
31894 with the same nickname, one of them is down, and you ask for
31895 them by nickname in your EntryNodes or ExitNodes. Also, try
31896 to pick the one that's running rather than an arbitrary one.
31897 - Fix an infinite loop we could hit if we go offline for too long.
31898 - Complain when we hit WSAENOBUFS on recv() or write() too.
31899 Perhaps this will help us hunt the bug.
31900 - If you're not a versioning dirserver, don't put the string
31901 "client-versions \nserver-versions \n" in your network-status.
31902 - Lower the minimum required number of file descriptors to 1000,
31903 so we can have some overhead for Valgrind on Linux, where the
31904 default ulimit -n is 1024.
31907 - Add tor.dizum.com as the fifth authoritative directory server.
31908 - Add a new config option FetchUselessDescriptors, off by default,
31909 for when you plan to run "exitlist" on your client and you want
31910 to know about even the non-running descriptors.
31913 Changes in version 0.1.1.17-rc - 2006-03-28
31915 - Clients and servers since 0.1.1.10-alpha have been expiring
31916 connections whenever they are idle for 5 minutes and they *do*
31917 have circuits on them. Oops. With this new version, clients will
31918 discard their previous entry guard choices and avoid choosing
31919 entry guards running these flawed versions.
31920 - Fix memory leak when uncompressing concatenated zlib streams. This
31921 was causing substantial leaks over time on Tor servers.
31922 - The v1 directory was including servers as much as 48 hours old,
31923 because that's how the new routerlist->routers works. Now only
31924 include them if they're 20 hours old or less.
31927 - Resume building on irix64, netbsd 2.0, etc.
31928 - On non-gcc compilers (e.g. solaris), use "-g -O" instead of
31930 - Stop writing the "router.desc" file, ever. Nothing uses it anymore,
31931 and it is confusing some users.
31932 - Mirrors stop caching the v1 directory so often.
31933 - Make the max number of old descriptors that a cache will hold
31934 rise with the number of directory authorities, so we can scale.
31935 - Change our win32 uname() hack to be more forgiving about what
31936 win32 versions it thinks it's found.
31939 - Add lefkada.eecs.harvard.edu as a fourth authoritative directory
31941 - When the controller's *setconf commands fail, collect an error
31942 message in a string and hand it back to the controller.
31943 - Make the v2 dir's "Fast" flag based on relative capacity, just
31944 like "Stable" is based on median uptime. Name everything in the
31945 top 7/8 Fast, and only the top 1/2 gets to be a Guard.
31946 - Log server fingerprint on startup, so new server operators don't
31947 have to go hunting around their filesystem for it.
31948 - Return a robots.txt on our dirport to discourage google indexing.
31949 - Let the controller ask for GETINFO dir/status/foo so it can ask
31950 directly rather than connecting to the dir port. Only works when
31951 dirport is set for now.
31953 o New config options rather than constants in the code:
31954 - SocksTimeout: How long do we let a socks connection wait
31955 unattached before we fail it?
31956 - CircuitBuildTimeout: Cull non-open circuits that were born
31957 at least this many seconds ago.
31958 - CircuitIdleTimeout: Cull open clean circuits that were born
31959 at least this many seconds ago.
31962 Changes in version 0.1.1.16-rc - 2006-03-18
31963 o Bugfixes on 0.1.1.15-rc:
31964 - Fix assert when the controller asks to attachstream a connect-wait
31965 or resolve-wait stream.
31966 - Now do address rewriting when the controller asks us to attach
31967 to a particular circuit too. This will let Blossom specify
31968 "moria2.exit" without having to learn what moria2's IP address is.
31969 - Make the "tor --verify-config" command-line work again, so people
31970 can automatically check if their torrc will parse.
31971 - Authoritative dirservers no longer require an open connection from
31972 a server to consider him "reachable". We need this change because
31973 when we add new auth dirservers, old servers won't know not to
31975 - Let Tor build on Sun CC again.
31976 - Fix an off-by-one buffer size in dirserv.c that magically never
31977 hit our three authorities but broke sjmurdoch's own tor network.
31978 - If we as a directory mirror don't know of any v1 directory
31979 authorities, then don't try to cache any v1 directories.
31980 - Stop warning about unknown servers in our family when they are
31981 given as hex digests.
31982 - Stop complaining as quickly to the server operator that he
31983 hasn't registered his nickname/key binding.
31984 - Various cleanups so we can add new V2 Auth Dirservers.
31985 - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to
31986 reflect the updated flags in our v2 dir protocol.
31987 - Resume allowing non-printable characters for exit streams (both
31988 for connecting and for resolving). Now we tolerate applications
31989 that don't follow the RFCs. But continue to block malformed names
31992 o Bugfixes on 0.1.0.x:
31993 - Fix assert bug in close_logs(): when we close and delete logs,
31994 remove them all from the global "logfiles" list.
31995 - Fix minor integer overflow in calculating when we expect to use up
31996 our bandwidth allocation before hibernating.
31997 - Fix a couple of bugs in OpenSSL detection. Also, deal better when
31998 there are multiple SSLs installed with different versions.
31999 - When we try to be a server and Address is not explicitly set and
32000 our hostname resolves to a private IP address, try to use an
32001 interface address if it has a public address. Now Windows machines
32002 that think of themselves as localhost can work by default.
32005 - Let the controller ask for GETINFO dir/server/foo so it can ask
32006 directly rather than connecting to the dir port.
32007 - Let the controller tell us about certain router descriptors
32008 that it doesn't want Tor to use in circuits. Implement
32009 SETROUTERPURPOSE and modify +POSTDESCRIPTOR to do this.
32010 - New config option SafeSocks to reject all application connections
32011 using unsafe socks protocols. Defaults to off.
32014 Changes in version 0.1.1.15-rc - 2006-03-11
32015 o Bugfixes and cleanups:
32016 - When we're printing strings from the network, don't try to print
32017 non-printable characters. This protects us against shell escape
32018 sequence exploits, and also against attacks to fool humans into
32019 misreading their logs.
32020 - Fix a bug where Tor would fail to establish any connections if you
32021 left it off for 24 hours and then started it: we were happy with
32022 the obsolete network statuses, but they all referred to router
32023 descriptors that were too old to fetch, so we ended up with no
32024 valid router descriptors.
32025 - Fix a seg fault in the controller's "getinfo orconn-status"
32026 command while listing status on incoming handshaking connections.
32027 Introduce a status name "NEW" for these connections.
32028 - If we get a linelist or linelist_s config option from the torrc
32029 (e.g. ExitPolicy) and it has no value, warn and skip rather than
32030 silently resetting it to its default.
32031 - Don't abandon entry guards until they've been down or gone for
32033 - Cleaner and quieter log messages.
32036 - New controller signal NEWNYM that makes new application requests
32037 use clean circuits.
32038 - Add a new circuit purpose 'controller' to let the controller ask
32039 for a circuit that Tor won't try to use. Extend the EXTENDCIRCUIT
32040 controller command to let you specify the purpose if you're
32041 starting a new circuit. Add a new SETCIRCUITPURPOSE controller
32042 command to let you change a circuit's purpose after it's been
32044 - Accept "private:*" in routerdesc exit policies; not generated yet
32045 because older Tors do not understand it.
32046 - Add BSD-style contributed startup script "rc.subr" from Peter
32050 Changes in version 0.1.1.14-alpha - 2006-02-20
32051 o Bugfixes on 0.1.1.x:
32052 - Don't die if we ask for a stdout or stderr log (even implicitly)
32053 and we're set to RunAsDaemon -- just warn.
32054 - We still had a few bugs in the OR connection rotation code that
32055 caused directory servers to slowly aggregate connections to other
32056 fast Tor servers. This time for sure!
32057 - Make log entries on Win32 include the name of the function again.
32058 - We were treating a pair of exit policies if they were equal even
32059 if one said accept and the other said reject -- causing us to
32060 not always publish a new descriptor since we thought nothing
32062 - Retry pending server downloads as well as pending networkstatus
32063 downloads when we unexpectedly get a socks request.
32064 - We were ignoring the IS_FAST flag in the directory status,
32065 meaning we were willing to pick trivial-bandwidth nodes for "fast"
32067 - If the controller's SAVECONF command fails (e.g. due to file
32068 permissions), let the controller know that it failed.
32071 - If we're trying to be a Tor server and running Windows 95/98/ME
32072 as a server, explain that we'll likely crash.
32073 - When we're a server, a client asks for an old-style directory,
32074 and our write bucket is empty, don't give it to him. This way
32075 small servers can continue to serve the directory *sometimes*,
32076 without getting overloaded.
32077 - Compress exit policies even more -- look for duplicate lines
32079 - Clients now honor the "guard" flag in the router status when
32080 picking entry guards, rather than looking at is_fast or is_stable.
32081 - Retain unrecognized lines in $DATADIR/state file, so that we can
32082 be forward-compatible.
32083 - Generate 18.0.0.0/8 address policy format in descs when we can;
32084 warn when the mask is not reducible to a bit-prefix.
32085 - Let the user set ControlListenAddress in the torrc. This can be
32086 dangerous, but there are some cases (like a secured LAN) where it
32088 - Split ReachableAddresses into ReachableDirAddresses and
32089 ReachableORAddresses, so we can restrict Dir conns to port 80
32090 and OR conns to port 443.
32091 - Now we can target arch and OS in rpm builds (contributed by
32092 Phobos). Also make the resulting dist-rpm filename match the
32094 - New config options to help controllers: FetchServerDescriptors
32095 and FetchHidServDescriptors for whether to fetch server
32096 info and hidserv info or let the controller do it, and
32097 PublishServerDescriptor and PublishHidServDescriptors.
32098 - Also let the controller set the __AllDirActionsPrivate config
32099 option if you want all directory fetches/publishes to happen via
32100 Tor (it assumes your controller bootstraps your circuits).
32103 Changes in version 0.1.0.17 - 2006-02-17
32104 o Crash bugfixes on 0.1.0.x:
32105 - When servers with a non-zero DirPort came out of hibernation,
32106 sometimes they would trigger an assert.
32108 o Other important bugfixes:
32109 - On platforms that don't have getrlimit (like Windows), we were
32110 artificially constraining ourselves to a max of 1024
32111 connections. Now just assume that we can handle as many as 15000
32112 connections. Hopefully this won't cause other problems.
32114 o Backported features:
32115 - When we're a server, a client asks for an old-style directory,
32116 and our write bucket is empty, don't give it to him. This way
32117 small servers can continue to serve the directory *sometimes*,
32118 without getting overloaded.
32119 - Whenever you get a 503 in response to a directory fetch, try
32120 once more. This will become important once servers start sending
32121 503's whenever they feel busy.
32122 - Fetch a new directory every 120 minutes, not every 40 minutes.
32123 Now that we have hundreds of thousands of users running the old
32124 directory algorithm, it's starting to hurt a lot.
32125 - Bump up the period for forcing a hidden service descriptor upload
32126 from 20 minutes to 1 hour.
32129 Changes in version 0.1.1.13-alpha - 2006-02-09
32130 o Crashes in 0.1.1.x:
32131 - When you tried to setconf ORPort via the controller, Tor would
32132 crash. So people using TorCP to become a server were sad.
32133 - Solve (I hope) the stack-smashing bug that we were seeing on fast
32134 servers. The problem appears to be something do with OpenSSL's
32135 random number generation, or how we call it, or something. Let me
32136 know if the crashes continue.
32137 - Turn crypto hardware acceleration off by default, until we find
32138 somebody smart who can test it for us. (It appears to produce
32139 seg faults in at least some cases.)
32140 - Fix a rare assert error when we've tried all intro points for
32141 a hidden service and we try fetching the service descriptor again:
32142 "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed"
32145 - Fix a major load balance bug: we were round-robining in 16 KB
32146 chunks, and servers with bandwidthrate of 20 KB, while downloading
32147 a 600 KB directory, would starve their other connections. Now we
32148 try to be a bit more fair.
32149 - Dir authorities and mirrors were never expiring the newest
32150 descriptor for each server, causing memory and directory bloat.
32151 - Fix memory-bloating and connection-bloating bug on servers: We
32152 were never closing any connection that had ever had a circuit on
32153 it, because we were checking conn->n_circuits == 0, yet we had a
32154 bug that let it go negative.
32155 - Make Tor work using squid as your http proxy again -- squid
32156 returns an error if you ask for a URL that's too long, and it uses
32157 a really generic error message. Plus, many people are behind a
32158 transparent squid so they don't even realize it.
32159 - On platforms that don't have getrlimit (like Windows), we were
32160 artificially constraining ourselves to a max of 1024
32161 connections. Now just assume that we can handle as many as 15000
32162 connections. Hopefully this won't cause other problems.
32163 - Add a new config option ExitPolicyRejectPrivate which defaults to
32164 1. This means all exit policies will begin with rejecting private
32165 addresses, unless the server operator explicitly turns it off.
32168 - Clients no longer download descriptors for non-running
32170 - Before we add new directory authorities, we should make it
32171 clear that only v1 authorities should receive/publish hidden
32172 service descriptors.
32175 - As soon as we've fetched some more directory info, immediately
32176 try to download more server descriptors. This way we don't have
32177 a 10 second pause during initial bootstrapping.
32178 - Remove even more loud log messages that the server operator can't
32180 - When we're running an obsolete or un-recommended version, make
32181 the log message more clear about what the problem is and what
32182 versions *are* still recommended.
32183 - Provide a more useful warn message when our onion queue gets full:
32184 the CPU is too slow or the exit policy is too liberal.
32185 - Don't warn when we receive a 503 from a dirserver/cache -- this
32186 will pave the way for them being able to refuse if they're busy.
32187 - When we fail to bind a listener, try to provide a more useful
32188 log message: e.g., "Is Tor already running?"
32189 - Adjust tor-spec to parameterize cell and key lengths. Now Ian
32190 Goldberg can prove things about our handshake protocol more
32192 - MaxConn has been obsolete for a while now. Document the ConnLimit
32193 config option, which is a *minimum* number of file descriptors
32194 that must be available else Tor refuses to start.
32195 - Apply Matt Ghali's --with-syslog-facility patch to ./configure
32196 if you log to syslog and want something other than LOG_DAEMON.
32197 - Make dirservers generate a separate "guard" flag to mean,
32198 "would make a good entry guard". Make clients parse it and vote
32199 on it. Not used by clients yet.
32200 - Implement --with-libevent-dir option to ./configure. Also, improve
32201 search techniques to find libevent, and use those for openssl too.
32202 - Bump the default bandwidthrate to 3 MB, and burst to 6 MB
32203 - Only start testing reachability once we've established a
32204 circuit. This will make startup on dirservers less noisy.
32205 - Don't try to upload hidden service descriptors until we have
32206 established a circuit.
32207 - Fix the controller's "attachstream 0" command to treat conn like
32208 it just connected, doing address remapping, handling .exit and
32209 .onion idioms, and so on. Now we're more uniform in making sure
32210 that the controller hears about new and closing connections.
32213 Changes in version 0.1.1.12-alpha - 2006-01-11
32214 o Bugfixes on 0.1.1.x:
32215 - The fix to close duplicate server connections was closing all
32216 Tor client connections if they didn't establish a circuit
32217 quickly enough. Oops.
32218 - Fix minor memory issue (double-free) that happened on exit.
32220 o Bugfixes on 0.1.0.x:
32221 - Tor didn't warn when it failed to open a log file.
32224 Changes in version 0.1.1.11-alpha - 2006-01-10
32225 o Crashes in 0.1.1.x:
32226 - Include all the assert/crash fixes from 0.1.0.16.
32227 - If you start Tor and then quit very quickly, there were some
32228 races that tried to free things that weren't allocated yet.
32229 - Fix a rare memory stomp if you're running hidden services.
32230 - Fix segfault when specifying DirServer in config without nickname.
32231 - Fix a seg fault when you finish connecting to a server but at
32232 that moment you dump his server descriptor.
32233 - Extendcircuit and Attachstream controller commands would
32234 assert/crash if you don't give them enough arguments.
32235 - Fix an assert error when we're out of space in the connection_list
32236 and we try to post a hidden service descriptor (reported by weasel).
32237 - If you specify a relative torrc path and you set RunAsDaemon in
32238 your torrc, then it chdir()'s to the new directory. If you HUP,
32239 it tries to load the new torrc location, fails, and exits.
32240 The fix: no longer allow a relative path to torrc using -f.
32243 - Implement "entry guards": automatically choose a handful of entry
32244 nodes and stick with them for all circuits. Only pick new guards
32245 when the ones you have are unsuitable, and if the old guards
32246 become suitable again, switch back. This will increase security
32247 dramatically against certain end-point attacks. The EntryNodes
32248 config option now provides some hints about which entry guards you
32249 want to use most; and StrictEntryNodes means to only use those.
32250 - New directory logic: download by descriptor digest, not by
32251 fingerprint. Caches try to download all listed digests from
32252 authorities; clients try to download "best" digests from caches.
32253 This avoids partitioning and isolating attacks better.
32254 - Make the "stable" router flag in network-status be the median of
32255 the uptimes of running valid servers, and make clients pay
32256 attention to the network-status flags. Thus the cutoff adapts
32257 to the stability of the network as a whole, making IRC, IM, etc
32258 connections more reliable.
32261 - Tor servers with dynamic IP addresses were needing to wait 18
32262 hours before they could start doing reachability testing using
32263 the new IP address and ports. This is because they were using
32264 the internal descriptor to learn what to test, yet they were only
32265 rebuilding the descriptor once they decided they were reachable.
32266 - Tor 0.1.1.9 and 0.1.1.10 had a serious bug that caused clients
32267 to download certain server descriptors, throw them away, and then
32268 fetch them again after 30 minutes. Now mirrors throw away these
32269 server descriptors so clients can't get them.
32270 - We were leaving duplicate connections to other ORs open for a week,
32271 rather than closing them once we detect a duplicate. This only
32272 really affected authdirservers, but it affected them a lot.
32273 - Spread the authdirservers' reachability testing over the entire
32274 testing interval, so we don't try to do 500 TLS's at once every
32278 - If the network is down, and we try to connect to a conn because
32279 we have a circuit in mind, and we timeout (30 seconds) because the
32280 network never answers, we were expiring the circuit, but we weren't
32281 obsoleting the connection or telling the entry_guards functions.
32282 - Some Tor servers process billions of cells per day. These statistics
32283 need to be uint64_t's.
32284 - Check for integer overflows in more places, when adding elements
32285 to smartlists. This could possibly prevent a buffer overflow
32286 on malicious huge inputs. I don't see any, but I haven't looked
32288 - ReachableAddresses kept growing new "reject *:*" lines on every
32290 - When you "setconf log" via the controller, it should remove all
32291 logs. We were automatically adding back in a "log notice stdout".
32292 - Newly bootstrapped Tor networks couldn't establish hidden service
32293 circuits until they had nodes with high uptime. Be more tolerant.
32294 - We were marking servers down when they could not answer every piece
32295 of the directory request we sent them. This was far too harsh.
32296 - Fix the torify (tsocks) config file to not use Tor for localhost
32298 - Directory authorities now go to the proper authority when asking for
32299 a networkstatus, even when they want a compressed one.
32300 - Fix a harmless bug that was causing Tor servers to log
32301 "Got an end because of misc error, but we're not an AP. Closing."
32302 - Authorities were treating their own descriptor changes as cosmetic,
32303 meaning the descriptor available in the network-status and the
32304 descriptor that clients downloaded were different.
32305 - The OS X installer was adding a symlink for tor_resolve but
32306 the binary was called tor-resolve (reported by Thomas Hardly).
32307 - Workaround a problem with some http proxies where they refuse GET
32308 requests that specify "Content-Length: 0" (reported by Adrian).
32309 - Fix wrong log message when you add a "HiddenServiceNodes" config
32310 line without any HiddenServiceDir line (reported by Chris Thomas).
32313 - Write the TorVersion into the state file so we have a prayer of
32314 keeping forward and backward compatibility.
32315 - Revive the FascistFirewall config option rather than eliminating it:
32316 now it's a synonym for ReachableAddresses *:80,*:443.
32317 - Clients choose directory servers from the network status lists,
32318 not from their internal list of router descriptors. Now they can
32319 go to caches directly rather than needing to go to authorities
32321 - Directory authorities ignore router descriptors that have only
32322 cosmetic differences: do this for 0.1.0.x servers now too.
32323 - Add a new flag to network-status indicating whether the server
32324 can answer v2 directory requests too.
32325 - Authdirs now stop whining so loudly about bad descriptors that
32326 they fetch from other dirservers. So when there's a log complaint,
32327 it's for sure from a freshly uploaded descriptor.
32328 - Reduce memory requirements in our structs by changing the order
32330 - There used to be two ways to specify your listening ports in a
32331 server descriptor: on the "router" line and with a separate "ports"
32332 line. Remove support for the "ports" line.
32333 - New config option "AuthDirRejectUnlisted" for auth dirservers as
32334 a panic button: if we get flooded with unusable servers we can
32335 revert to only listing servers in the approved-routers file.
32336 - Auth dir servers can now mark a fingerprint as "!reject" or
32337 "!invalid" in the approved-routers file (as its nickname), to
32338 refuse descriptors outright or include them but marked as invalid.
32339 - Servers store bandwidth history across restarts/crashes.
32340 - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can
32341 get a better idea of why their circuits failed. Not used yet.
32342 - Directory mirrors now cache up to 16 unrecognized network-status
32343 docs. Now we can add new authdirservers and they'll be cached too.
32344 - When picking a random directory, prefer non-authorities if any
32346 - New controller option "getinfo desc/all-recent" to fetch the
32347 latest server descriptor for every router that Tor knows about.
32350 Changes in version 0.1.0.16 - 2006-01-02
32351 o Crash bugfixes on 0.1.0.x:
32352 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
32353 corrupting the heap, losing FDs, or crashing when we need to resize
32354 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
32355 - It turns out sparc64 platforms crash on unaligned memory access
32356 too -- so detect and avoid this.
32357 - Handle truncated compressed data correctly (by detecting it and
32359 - Fix possible-but-unlikely free(NULL) in control.c.
32360 - When we were closing connections, there was a rare case that
32361 stomped on memory, triggering seg faults and asserts.
32362 - Avoid potential infinite recursion when building a descriptor. (We
32363 don't know that it ever happened, but better to fix it anyway.)
32364 - We were neglecting to unlink marked circuits from soon-to-close OR
32365 connections, which caused some rare scribbling on freed memory.
32366 - Fix a memory stomping race bug when closing the joining point of two
32367 rendezvous circuits.
32368 - Fix an assert in time parsing found by Steven Murdoch.
32370 o Other bugfixes on 0.1.0.x:
32371 - When we're doing reachability testing, provide more useful log
32372 messages so the operator knows what to expect.
32373 - Do not check whether DirPort is reachable when we are suppressing
32374 advertising it because of hibernation.
32375 - When building with -static or on Solaris, we sometimes needed -ldl.
32376 - When we're deciding whether a stream has enough circuits around
32377 that can handle it, count the freshly dirty ones and not the ones
32378 that are so dirty they won't be able to handle it.
32379 - When we're expiring old circuits, we had a logic error that caused
32380 us to close new rendezvous circuits rather than old ones.
32381 - Give a more helpful log message when you try to change ORPort via
32382 the controller: you should upgrade Tor if you want that to work.
32383 - We were failing to parse Tor versions that start with "Tor ".
32384 - Tolerate faulty streams better: when a stream fails for reason
32385 exitpolicy, stop assuming that the router is lying about his exit
32386 policy. When a stream fails for reason misc, allow it to retry just
32387 as if it was resolvefailed. When a stream has failed three times,
32388 reset its failure count so we can try again and get all three tries.
32391 Changes in version 0.1.1.10-alpha - 2005-12-11
32392 o Correctness bugfixes on 0.1.0.x:
32393 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
32394 corrupting the heap, losing FDs, or crashing when we need to resize
32395 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
32396 - Stop doing the complex voodoo overkill checking for insecure
32397 Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy.
32398 - When we were closing connections, there was a rare case that
32399 stomped on memory, triggering seg faults and asserts.
32400 - We were neglecting to unlink marked circuits from soon-to-close OR
32401 connections, which caused some rare scribbling on freed memory.
32402 - When we're deciding whether a stream has enough circuits around
32403 that can handle it, count the freshly dirty ones and not the ones
32404 that are so dirty they won't be able to handle it.
32405 - Recover better from TCP connections to Tor servers that are
32406 broken but don't tell you (it happens!); and rotate TLS
32407 connections once a week.
32408 - When we're expiring old circuits, we had a logic error that caused
32409 us to close new rendezvous circuits rather than old ones.
32410 - Fix a scary-looking but apparently harmless bug where circuits
32411 would sometimes start out in state CIRCUIT_STATE_OR_WAIT at
32412 servers, and never switch to state CIRCUIT_STATE_OPEN.
32413 - When building with -static or on Solaris, we sometimes needed to
32415 - Give a useful message when people run Tor as the wrong user,
32416 rather than telling them to start chowning random directories.
32417 - We were failing to inform the controller about new .onion streams.
32419 o Security bugfixes on 0.1.0.x:
32420 - Refuse server descriptors if the fingerprint line doesn't match
32421 the included identity key. Tor doesn't care, but other apps (and
32422 humans) might actually be trusting the fingerprint line.
32423 - We used to kill the circuit when we receive a relay command we
32424 don't recognize. Now we just drop it.
32425 - Start obeying our firewall options more rigorously:
32426 . If we can't get to a dirserver directly, try going via Tor.
32427 . Don't ever try to connect (as a client) to a place our
32428 firewall options forbid.
32429 . If we specify a proxy and also firewall options, obey the
32430 firewall options even when we're using the proxy: some proxies
32431 can only proxy to certain destinations.
32432 - Fix a bug found by Lasse Overlier: when we were making internal
32433 circuits (intended to be cannibalized later for rendezvous and
32434 introduction circuits), we were picking them so that they had
32435 useful exit nodes. There was no need for this, and it actually
32436 aids some statistical attacks.
32437 - Start treating internal circuits and exit circuits separately.
32438 It's important to keep them separate because internal circuits
32439 have their last hops picked like middle hops, rather than like
32440 exit hops. So exiting on them will break the user's expectations.
32442 o Bugfixes on 0.1.1.x:
32443 - Take out the mis-feature where we tried to detect IP address
32444 flapping for people with DynDNS, and chose not to upload a new
32445 server descriptor sometimes.
32446 - Try to be compatible with OpenSSL 0.9.6 again.
32447 - Log fix: when the controller is logging about .onion addresses,
32448 sometimes it didn't include the ".onion" part of the address.
32449 - Don't try to modify options->DirServers internally -- if the
32450 user didn't specify any, just add the default ones directly to
32451 the trusted dirserver list. This fixes a bug where people running
32452 controllers would use SETCONF on some totally unrelated config
32453 option, and Tor would start yelling at them about changing their
32455 - Let the controller's redirectstream command specify a port, in
32456 case the controller wants to change that too.
32457 - When we requested a pile of server descriptors, we sometimes
32458 accidentally launched a duplicate request for the first one.
32459 - Bugfix for trackhostexits: write down the fingerprint of the
32460 chosen exit, not its nickname, because the chosen exit might not
32462 - When parsing foo.exit, if foo is unknown, and we are leaving
32463 circuits unattached, set the chosen_exit field and leave the
32464 address empty. This matters because controllers got confused
32466 - Directory authorities no longer try to download server
32467 descriptors that they know they will reject.
32469 o Features and updates:
32470 - Replace balanced trees with hash tables: this should make stuff
32471 significantly faster.
32472 - Resume using the AES counter-mode implementation that we ship,
32473 rather than OpenSSL's. Ours is significantly faster.
32474 - Many other CPU and memory improvements.
32475 - Add a new config option FastFirstHopPK (on by default) so clients
32476 do a trivial crypto handshake for their first hop, since TLS has
32477 already taken care of confidentiality and authentication.
32478 - Add a new config option TestSocks so people can see if their
32479 applications are using socks4, socks4a, socks5-with-ip, or
32480 socks5-with-hostname. This way they don't have to keep mucking
32481 with tcpdump and wondering if something got cached somewhere.
32482 - Warn when listening on a public address for socks. I suspect a
32483 lot of people are setting themselves up as open socks proxies,
32484 and they have no idea that jerks on the Internet are using them,
32485 since they simply proxy the traffic into the Tor network.
32486 - Add "private:*" as an alias in configuration for policies. Now
32487 you can simplify your exit policy rather than needing to list
32488 every single internal or nonroutable network space.
32489 - Add a new controller event type that allows controllers to get
32490 all server descriptors that were uploaded to a router in its role
32491 as authoritative dirserver.
32492 - Start shipping socks-extensions.txt, tor-doc-unix.html,
32493 tor-doc-server.html, and stylesheet.css in the tarball.
32494 - Stop shipping tor-doc.html in the tarball.
32497 Changes in version 0.1.1.9-alpha - 2005-11-15
32498 o Usability improvements:
32499 - Start calling it FooListenAddress rather than FooBindAddress,
32500 since few of our users know what it means to bind an address
32502 - Reduce clutter in server logs. We're going to try to make
32503 them actually usable now. New config option ProtocolWarnings that
32504 lets you hear about how _other Tors_ are breaking the protocol. Off
32506 - Divide log messages into logging domains. Once we put some sort
32507 of interface on this, it will let people looking at more verbose
32508 log levels specify the topics they want to hear more about.
32509 - Make directory servers return better http 404 error messages
32510 instead of a generic "Servers unavailable".
32511 - Check for even more Windows version flags when writing the platform
32512 string in server descriptors, and note any we don't recognize.
32513 - Clean up more of the OpenSSL memory when exiting, so we can detect
32514 memory leaks better.
32515 - Make directory authorities be non-versioning, non-naming by
32516 default. Now we can add new directory servers without requiring
32517 their operators to pay close attention.
32518 - When logging via syslog, include the pid whenever we provide
32519 a log entry. Suggested by Todd Fries.
32521 o Performance improvements:
32522 - Directory servers now silently throw away new descriptors that
32523 haven't changed much if the timestamps are similar. We do this to
32524 tolerate older Tor servers that upload a new descriptor every 15
32525 minutes. (It seemed like a good idea at the time.)
32526 - Inline bottleneck smartlist functions; use fast versions by default.
32527 - Add a "Map from digest to void*" abstraction digestmap_t so we
32528 can do less hex encoding/decoding. Use it in router_get_by_digest()
32529 to resolve a performance bottleneck.
32530 - Allow tor_gzip_uncompress to extract as much as possible from
32531 truncated compressed data. Try to extract as many
32532 descriptors as possible from truncated http responses (when
32533 DIR_PURPOSE_FETCH_ROUTERDESC).
32534 - Make circ->onionskin a pointer, not a static array. moria2 was using
32535 125000 circuit_t's after it had been up for a few weeks, which
32536 translates to 20+ megs of wasted space.
32537 - The private half of our EDH handshake keys are now chosen out
32538 of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.)
32540 o Security improvements:
32541 - Start making directory caches retain old routerinfos, so soon
32542 clients can start asking by digest of descriptor rather than by
32543 fingerprint of server.
32544 - Add half our entropy from RAND_poll in OpenSSL. This knows how
32545 to use egd (if present), openbsd weirdness (if present), vms/os2
32546 weirdness (if we ever port there), and more in the future.
32548 o Bugfixes on 0.1.0.x:
32549 - Do round-robin writes of at most 16 kB per write. This might be
32550 more fair on loaded Tor servers, and it might resolve our Windows
32551 crash bug. It might also slow things down.
32552 - Our TLS handshakes were generating a single public/private
32553 keypair for the TLS context, rather than making a new one for
32554 each new connections. Oops. (But we were still rotating them
32555 periodically, so it's not so bad.)
32556 - When we were cannibalizing a circuit with a particular exit
32557 node in mind, we weren't checking to see if that exit node was
32558 already present earlier in the circuit. Oops.
32559 - When a Tor server's IP changes (e.g. from a dyndns address),
32560 upload a new descriptor so clients will learn too.
32561 - Really busy servers were keeping enough circuits open on stable
32562 connections that they were wrapping around the circuit_id
32563 space. (It's only two bytes.) This exposed a bug where we would
32564 feel free to reuse a circuit_id even if it still exists but has
32565 been marked for close. Try to fix this bug. Some bug remains.
32566 - If we would close a stream early (e.g. it asks for a .exit that
32567 we know would refuse it) but the LeaveStreamsUnattached config
32568 option is set by the controller, then don't close it.
32570 o Bugfixes on 0.1.1.8-alpha:
32571 - Fix a big pile of memory leaks, some of them serious.
32572 - Do not try to download a routerdesc if we would immediately reject
32574 - Resume inserting a newline between all router descriptors when
32575 generating (old style) signed directories, since our spec says
32577 - When providing content-type application/octet-stream for
32578 server descriptors using .z, we were leaving out the
32579 content-encoding header. Oops. (Everything tolerated this just
32580 fine, but that doesn't mean we need to be part of the problem.)
32581 - Fix a potential seg fault in getconf and getinfo using version 1
32582 of the controller protocol.
32583 - Avoid crash: do not check whether DirPort is reachable when we
32584 are suppressing it because of hibernation.
32585 - Make --hash-password not crash on exit.
32588 Changes in version 0.1.1.8-alpha - 2005-10-07
32589 o New features (major):
32590 - Clients don't download or use the directory anymore. Now they
32591 download and use network-statuses from the trusted dirservers,
32592 and fetch individual server descriptors as needed from mirrors.
32593 See dir-spec.txt for all the gory details.
32594 - Be more conservative about whether to advertise our DirPort.
32595 The main change is to not advertise if we're running at capacity
32596 and either a) we could hibernate or b) our capacity is low and
32597 we're using a default DirPort.
32598 - Use OpenSSL's AES when OpenSSL has version 0.9.7 or later.
32600 o New features (minor):
32601 - Try to be smart about when to retry network-status and
32602 server-descriptor fetches. Still needs some tuning.
32603 - Stop parsing, storing, or using running-routers output (but
32604 mirrors still cache and serve it).
32605 - Consider a threshold of versioning dirservers (dirservers who have
32606 an opinion about which Tor versions are still recommended) before
32607 deciding whether to warn the user that he's obsolete.
32608 - Dirservers can now reject/invalidate by key and IP, with the
32609 config options "AuthDirInvalid" and "AuthDirReject". This is
32610 useful since currently we automatically list servers as running
32611 and usable even if we know they're jerks.
32612 - Provide dire warnings to any users who set DirServer; move it out
32613 of torrc.sample and into torrc.complete.
32614 - Add MyFamily to torrc.sample in the server section.
32615 - Add nicknames to the DirServer line, so we can refer to them
32616 without requiring all our users to memorize their IP addresses.
32617 - When we get an EOF or a timeout on a directory connection, note
32618 how many bytes of serverdesc we are dropping. This will help
32619 us determine whether it is smart to parse incomplete serverdesc
32621 - Add a new function to "change pseudonyms" -- that is, to stop
32622 using any currently-dirty circuits for new streams, so we don't
32623 link new actions to old actions. Currently it's only called on
32624 HUP (or SIGNAL RELOAD).
32625 - On sighup, if UseHelperNodes changed to 1, use new circuits.
32626 - Start using RAND_bytes rather than RAND_pseudo_bytes from
32627 OpenSSL. Also, reseed our entropy every hour, not just at
32628 startup. And entropy in 512-bit chunks, not 160-bit chunks.
32630 o Fixes on 0.1.1.7-alpha:
32631 - Nobody ever implemented EVENT_ADDRMAP for control protocol
32632 version 0, so don't let version 0 controllers ask for it.
32633 - If you requested something with too many newlines via the
32634 v1 controller protocol, you could crash tor.
32635 - Fix a number of memory leaks, including some pretty serious ones.
32636 - Re-enable DirPort testing again, so Tor servers will be willing
32637 to advertise their DirPort if it's reachable.
32638 - On TLS handshake, only check the other router's nickname against
32639 its expected nickname if is_named is set.
32641 o Fixes forward-ported from 0.1.0.15:
32642 - Don't crash when we don't have any spare file descriptors and we
32643 try to spawn a dns or cpu worker.
32644 - Make the numbers in read-history and write-history into uint64s,
32645 so they don't overflow and publish negatives in the descriptor.
32647 o Fixes on 0.1.0.x:
32648 - For the OS X package's modified privoxy config file, comment
32649 out the "logfile" line so we don't log everything passed
32651 - We were whining about using socks4 or socks5-with-local-lookup
32652 even when it's an IP in the "virtual" range we designed exactly
32654 - We were leaking some memory every time the client changes IPs.
32655 - Never call free() on tor_malloc()d memory. This will help us
32656 use dmalloc to detect memory leaks.
32657 - Check for named servers when looking them up by nickname;
32658 warn when we'recalling a non-named server by its nickname;
32659 don't warn twice about the same name.
32660 - Try to list MyFamily elements by key, not by nickname, and warn
32661 if we've not heard of the server.
32662 - Make windows platform detection (uname equivalent) smarter.
32663 - It turns out sparc64 doesn't like unaligned access either.
32666 Changes in version 0.1.0.15 - 2005-09-23
32667 o Bugfixes on 0.1.0.x:
32668 - Reject ports 465 and 587 (spam targets) in default exit policy.
32669 - Don't crash when we don't have any spare file descriptors and we
32670 try to spawn a dns or cpu worker.
32671 - Get rid of IgnoreVersion undocumented config option, and make us
32672 only warn, never exit, when we're running an obsolete version.
32673 - Don't try to print a null string when your server finds itself to
32674 be unreachable and the Address config option is empty.
32675 - Make the numbers in read-history and write-history into uint64s,
32676 so they don't overflow and publish negatives in the descriptor.
32677 - Fix a minor memory leak in smartlist_string_remove().
32678 - We were only allowing ourselves to upload a server descriptor at
32679 most every 20 minutes, even if it changed earlier than that.
32680 - Clean up log entries that pointed to old URLs.
32683 Changes in version 0.1.1.7-alpha - 2005-09-14
32684 o Fixes on 0.1.1.6-alpha:
32685 - Exit servers were crashing when people asked them to make a
32686 connection to an address not in their exit policy.
32687 - Looking up a non-existent stream for a v1 control connection would
32689 - Fix a seg fault if we ask a dirserver for a descriptor by
32690 fingerprint but he doesn't know about him.
32691 - SETCONF was appending items to linelists, not clearing them.
32692 - SETCONF SocksBindAddress killed Tor if it fails to bind. Now back
32693 out and refuse the setconf if it would fail.
32694 - Downgrade the dirserver log messages when whining about
32698 - Add Peter Palfrader's check-tor script to tor/contrib/
32699 It lets you easily check whether a given server (referenced by
32700 nickname) is reachable by you.
32701 - Numerous changes to move towards client-side v2 directories. Not
32704 o Fixes on 0.1.0.x:
32705 - If the user gave tor an odd number of command-line arguments,
32706 we were silently ignoring the last one. Now we complain and fail.
32707 [This wins the oldest-bug prize -- this bug has been present since
32708 November 2002, as released in Tor 0.0.0.]
32709 - Do not use unaligned memory access on alpha, mips, or mipsel.
32710 It *works*, but is very slow, so we treat them as if it doesn't.
32711 - Retry directory requests if we fail to get an answer we like
32712 from a given dirserver (we were retrying before, but only if
32713 we fail to connect).
32714 - When writing the RecommendedVersions line, sort them first.
32715 - When the client asked for a rendezvous port that the hidden
32716 service didn't want to provide, we were sending an IP address
32717 back along with the end cell. Fortunately, it was zero. But stop
32719 - Correct "your server is reachable" log entries to indicate that
32720 it was self-testing that told us so.
32723 Changes in version 0.1.1.6-alpha - 2005-09-09
32724 o Fixes on 0.1.1.5-alpha:
32725 - We broke fascistfirewall in 0.1.1.5-alpha. Oops.
32726 - Fix segfault in unit tests in 0.1.1.5-alpha. Oops.
32727 - Fix bug with tor_memmem finding a match at the end of the string.
32728 - Make unit tests run without segfaulting.
32729 - Resolve some solaris x86 compile warnings.
32730 - Handle duplicate lines in approved-routers files without warning.
32731 - Fix bug where as soon as a server refused any requests due to his
32732 exit policy (e.g. when we ask for localhost and he tells us that's
32733 127.0.0.1 and he won't do it), we decided he wasn't obeying his
32734 exit policy using him for any exits.
32735 - Only do openssl hardware accelerator stuff if openssl version is
32738 o New controller features/fixes:
32739 - Add a "RESETCONF" command so you can set config options like
32740 AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
32741 a config option in the torrc with no value, then it clears it
32742 entirely (rather than setting it to its default).
32743 - Add a "GETINFO config-file" to tell us where torrc is.
32744 - Avoid sending blank lines when GETINFO replies should be empty.
32745 - Add a QUIT command for the controller (for using it manually).
32746 - Fix a bug in SAVECONF that was adding default dirservers and
32747 other redundant entries to the torrc file.
32749 o Start on the new directory design:
32750 - Generate, publish, cache, serve new network-status format.
32751 - Publish individual descriptors (by fingerprint, by "all", and by
32753 - Publish client and server recommended versions separately.
32754 - Allow tor_gzip_uncompress() to handle multiple concatenated
32755 compressed strings. Serve compressed groups of router
32756 descriptors. The compression logic here could be more
32758 - Distinguish v1 authorities (all currently trusted directories)
32759 from v2 authorities (all trusted directories).
32760 - Change DirServers config line to note which dirs are v1 authorities.
32761 - Add configuration option "V1AuthoritativeDirectory 1" which
32762 moria1, moria2, and tor26 should set.
32763 - Remove option when getting directory cache to see whether they
32764 support running-routers; they all do now. Replace it with one
32765 to see whether caches support v2 stuff.
32768 - Dirservers now do their own external reachability testing of each
32769 Tor server, and only list them as running if they've been found to
32770 be reachable. We also send back warnings to the server's logs if
32771 it uploads a descriptor that we already believe is unreachable.
32772 - Implement exit enclaves: if we know an IP address for the
32773 destination, and there's a running Tor server at that address
32774 which allows exit to the destination, then extend the circuit to
32775 that exit first. This provides end-to-end encryption and end-to-end
32776 authentication. Also, if the user wants a .exit address or enclave,
32777 use 4 hops rather than 3, and cannibalize a general circ for it
32779 - Permit transitioning from ORPort=0 to ORPort!=0, and back, from the
32780 controller. Also, rotate dns and cpu workers if the controller
32781 changes options that will affect them; and initialize the dns
32782 worker cache tree whether or not we start out as a server.
32783 - Only upload a new server descriptor when options change, 18
32784 hours have passed, uptime is reset, or bandwidth changes a lot.
32785 - Check [X-]Forwarded-For headers in HTTP requests when generating
32786 log messages. This lets people run dirservers (and caches) behind
32787 Apache but still know which IP addresses are causing warnings.
32789 o Config option changes:
32790 - Replace (Fascist)Firewall* config options with a new
32791 ReachableAddresses option that understands address policies.
32792 For example, "ReachableAddresses *:80,*:443"
32793 - Get rid of IgnoreVersion undocumented config option, and make us
32794 only warn, never exit, when we're running an obsolete version.
32795 - Make MonthlyAccountingStart config option truly obsolete now.
32797 o Fixes on 0.1.0.x:
32798 - Reject ports 465 and 587 in the default exit policy, since
32799 people have started using them for spam too.
32800 - It turns out we couldn't bootstrap a network since we added
32801 reachability detection in 0.1.0.1-rc. Good thing the Tor network
32802 has never gone down. Add an AssumeReachable config option to let
32803 servers and dirservers bootstrap. When we're trying to build a
32804 high-uptime or high-bandwidth circuit but there aren't enough
32805 suitable servers, try being less picky rather than simply failing.
32806 - Our logic to decide if the OR we connected to was the right guy
32807 was brittle and maybe open to a mitm for unverified routers.
32808 - We weren't cannibalizing circuits correctly for
32809 CIRCUIT_PURPOSE_C_ESTABLISH_REND and
32810 CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
32811 build those from scratch. This should make hidden services faster.
32812 - Predict required circuits better, with an eye toward making hidden
32813 services faster on the service end.
32814 - Retry streams if the exit node sends back a 'misc' failure. This
32815 should result in fewer random failures. Also, after failing
32816 from resolve failed or misc, reset the num failures, so we give
32817 it a fair shake next time we try.
32818 - Clean up the rendezvous warn log msgs, and downgrade some to info.
32819 - Reduce severity on logs about dns worker spawning and culling.
32820 - When we're shutting down and we do something like try to post a
32821 server descriptor or rendezvous descriptor, don't complain that
32822 we seem to be unreachable. Of course we are, we're shutting down.
32823 - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
32824 We don't use them yet, but maybe one day our DNS resolver will be
32825 able to discover them.
32826 - Make ContactInfo mandatory for authoritative directory servers.
32827 - Require server descriptors to list IPv4 addresses -- hostnames
32828 are no longer allowed. This also fixes some potential security
32829 problems with people providing hostnames as their address and then
32830 preferentially resolving them to partition users.
32831 - Change log line for unreachability to explicitly suggest /etc/hosts
32832 as the culprit. Also make it clearer what IP address and ports we're
32833 testing for reachability.
32834 - Put quotes around user-supplied strings when logging so users are
32835 more likely to realize if they add bad characters (like quotes)
32837 - Let auth dir servers start without specifying an Address config
32839 - Make unit tests (and other invocations that aren't the real Tor)
32840 run without launching listeners, creating subdirectories, and so on.
32843 Changes in version 0.1.1.5-alpha - 2005-08-08
32844 o Bugfixes included in 0.1.0.14.
32846 o Bugfixes on 0.1.0.x:
32847 - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
32848 torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
32849 it would silently using ignore the 6668.
32852 Changes in version 0.1.0.14 - 2005-08-08
32853 o Bugfixes on 0.1.0.x:
32854 - Fix the other half of the bug with crypto handshakes
32856 - Fix an assert trigger if you send a 'signal term' via the
32857 controller when it's listening for 'event info' messages.
32860 Changes in version 0.1.1.4-alpha - 2005-08-04
32861 o Bugfixes included in 0.1.0.13.
32864 - Improve tor_gettimeofday() granularity on windows.
32865 - Make clients regenerate their keys when their IP address changes.
32866 - Implement some more GETINFO goodness: expose helper nodes, config
32867 options, getinfo keys.
32870 Changes in version 0.1.0.13 - 2005-08-04
32871 o Bugfixes on 0.1.0.x:
32872 - Fix a critical bug in the security of our crypto handshakes.
32873 - Fix a size_t underflow in smartlist_join_strings2() that made
32874 it do bad things when you hand it an empty smartlist.
32875 - Fix Windows installer to ship Tor license (thanks to Aphex for
32876 pointing out this oversight) and put a link to the doc directory
32878 - Explicitly set no-unaligned-access for sparc: it turns out the
32879 new gcc's let you compile broken code, but that doesn't make it
32883 Changes in version 0.1.1.3-alpha - 2005-07-23
32884 o Bugfixes on 0.1.1.2-alpha:
32885 - Fix a bug in handling the controller's "post descriptor"
32887 - Fix several bugs in handling the controller's "extend circuit"
32889 - Fix a bug in handling the controller's "stream status" event.
32890 - Fix an assert failure if we have a controller listening for
32891 circuit events and we go offline.
32892 - Re-allow hidden service descriptors to publish 0 intro points.
32893 - Fix a crash when generating your hidden service descriptor if
32894 you don't have enough intro points already.
32896 o New features on 0.1.1.2-alpha:
32897 - New controller function "getinfo accounting", to ask how
32898 many bytes we've used in this time period.
32899 - Experimental support for helper nodes: a lot of the risk from
32900 a small static adversary comes because users pick new random
32901 nodes every time they rebuild a circuit. Now users will try to
32902 stick to the same small set of entry nodes if they can. Not
32903 enabled by default yet.
32905 o Bugfixes on 0.1.0.12:
32906 - If you're an auth dir server, always publish your dirport,
32907 even if you haven't yet found yourself to be reachable.
32908 - Fix a size_t underflow in smartlist_join_strings2() that made
32909 it do bad things when you hand it an empty smartlist.
32912 Changes in version 0.1.0.12 - 2005-07-18
32913 o New directory servers:
32914 - tor26 has changed IP address.
32916 o Bugfixes on 0.1.0.x:
32917 - Fix a possible double-free in tor_gzip_uncompress().
32918 - When --disable-threads is set, do not search for or link against
32919 pthreads libraries.
32920 - Don't trigger an assert if an authoritative directory server
32921 claims its dirport is 0.
32922 - Fix bug with removing Tor as an NT service: some people were
32923 getting "The service did not return an error." Thanks to Matt
32927 Changes in version 0.1.1.2-alpha - 2005-07-15
32928 o New directory servers:
32929 - tor26 has changed IP address.
32931 o Bugfixes on 0.1.0.x, crashes/leaks:
32932 - Port the servers-not-obeying-their-exit-policies fix from
32934 - Fix an fd leak in start_daemon().
32935 - On Windows, you can't always reopen a port right after you've
32936 closed it. So change retry_listeners() to only close and re-open
32937 ports that have changed.
32938 - Fix a possible double-free in tor_gzip_uncompress().
32940 o Bugfixes on 0.1.0.x, usability:
32941 - When tor_socketpair() fails in Windows, give a reasonable
32942 Windows-style errno back.
32943 - Let people type "tor --install" as well as "tor -install" when
32945 want to make it an NT service.
32946 - NT service patch from Matt Edman to improve error messages.
32947 - When the controller asks for a config option with an abbreviated
32948 name, give the full name in our response.
32949 - Correct the man page entry on TrackHostExitsExpire.
32950 - Looks like we were never delivering deflated (i.e. compressed)
32951 running-routers lists, even when asked. Oops.
32952 - When --disable-threads is set, do not search for or link against
32953 pthreads libraries.
32955 o Bugfixes on 0.1.1.x:
32956 - Fix a seg fault with autodetecting which controller version is
32960 - New hidden service descriptor format: put a version in it, and
32961 let people specify introduction/rendezvous points that aren't
32962 in "the directory" (which is subjective anyway).
32963 - Allow the DEBUG controller event to work again. Mark certain log
32964 entries as "don't tell this to controllers", so we avoid cycles.
32967 Changes in version 0.1.0.11 - 2005-06-30
32968 o Bugfixes on 0.1.0.x:
32969 - Fix major security bug: servers were disregarding their
32970 exit policies if clients behaved unexpectedly.
32971 - Make OS X init script check for missing argument, so we don't
32972 confuse users who invoke it incorrectly.
32973 - Fix a seg fault in "tor --hash-password foo".
32974 - The MAPADDRESS control command was broken.
32977 Changes in version 0.1.1.1-alpha - 2005-06-29
32979 - Make OS X init script check for missing argument, so we don't
32980 confuse users who invoke it incorrectly.
32981 - Fix a seg fault in "tor --hash-password foo".
32982 - Fix a possible way to DoS dirservers.
32983 - When we complain that your exit policy implicitly allows local or
32984 private address spaces, name them explicitly so operators can
32986 - Make the log message less scary when all the dirservers are
32987 temporarily unreachable.
32988 - We were printing the number of idle dns workers incorrectly when
32992 - Revised controller protocol (version 1) that uses ascii rather
32993 than binary. Add supporting libraries in python and java so you
32994 can use the controller from your applications without caring how
32995 our protocol works.
32996 - Spiffy new support for crypto hardware accelerators. Can somebody
33000 Changes in version 0.0.9.10 - 2005-06-16
33001 o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
33002 - Refuse relay cells that claim to have a length larger than the
33003 maximum allowed. This prevents a potential attack that could read
33004 arbitrary memory (e.g. keys) from an exit server's process
33008 Changes in version 0.1.0.10 - 2005-06-14
33009 o Allow a few EINVALs from libevent before dying. Warn on kqueue with
33010 libevent before 1.1a.
33013 Changes in version 0.1.0.9-rc - 2005-06-09
33015 - Reset buf->highwater every time buf_shrink() is called, not just on
33016 a successful shrink. This was causing significant memory bloat.
33017 - Fix buffer overflow when checking hashed passwords.
33018 - Security fix: if seeding the RNG on Win32 fails, quit.
33019 - Allow seeding the RNG on Win32 even when you're not running as
33021 - Disable threading on Solaris too. Something is wonky with it,
33022 cpuworkers, and reentrant libs.
33023 - Reenable the part of the code that tries to flush as soon as an
33024 OR outbuf has a full TLS record available. Perhaps this will make
33025 OR outbufs not grow as huge except in rare cases, thus saving lots
33026 of CPU time plus memory.
33027 - Reject malformed .onion addresses rather then passing them on as
33028 normal web requests.
33029 - Adapt patch from Adam Langley: fix possible memory leak in
33030 tor_lookup_hostname().
33031 - Initialize libevent later in the startup process, so the logs are
33032 already established by the time we start logging libevent warns.
33033 - Use correct errno on win32 if libevent fails.
33034 - Check and warn about known-bad/slow libevent versions.
33035 - Pay more attention to the ClientOnly config option.
33036 - Have torctl.in/tor.sh.in check for location of su binary (needed
33038 - Correct/add man page entries for LongLivedPorts, ExitPolicy,
33039 KeepalivePeriod, ClientOnly, NoPublish, HttpProxy, HttpsProxy,
33040 HttpProxyAuthenticator
33041 - Stop warning about sigpipes in the logs. We're going to
33042 pretend that getting these occasionally is normal and fine.
33043 - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in
33045 installer screens; and don't put stuff into StartupItems unless
33046 the user asks you to.
33047 - Require servers that use the default dirservers to have public IP
33048 addresses. We have too many servers that are configured with private
33049 IPs and their admins never notice the log entries complaining that
33050 their descriptors are being rejected.
33051 - Add OSX uninstall instructions. An actual uninstall script will
33055 Changes in version 0.1.0.8-rc - 2005-05-23
33057 - It turns out that kqueue on OS X 10.3.9 was causing kernel
33058 panics. Disable kqueue on all OS X Tors.
33059 - Fix RPM: remove duplicate line accidentally added to the rpm
33061 - Disable threads on openbsd too, since its gethostaddr is not
33063 - Tolerate libevent 0.8 since it still works, even though it's
33065 - Enable building on Red Hat 9.0 again.
33066 - Allow the middle hop of the testing circuit to be running any
33067 version, now that most of them have the bugfix to let them connect
33068 to unknown servers. This will allow reachability testing to work
33069 even when 0.0.9.7-0.0.9.9 become obsolete.
33070 - Handle relay cells with rh.length too large. This prevents
33071 a potential attack that could read arbitrary memory (maybe even
33072 keys) from the exit server's process.
33073 - We screwed up the dirport reachability testing when we don't yet
33074 have a cached version of the directory. Hopefully now fixed.
33075 - Clean up router_load_single_router() (used by the controller),
33076 so it doesn't seg fault on error.
33077 - Fix a minor memory leak when somebody establishes an introduction
33078 point at your Tor server.
33079 - If a socks connection ends because read fails, don't warn that
33080 you're not sending a socks reply back.
33083 - Add HttpProxyAuthenticator config option too, that works like
33084 the HttpsProxyAuthenticator config option.
33085 - Encode hashed controller passwords in hex instead of base64,
33086 to make it easier to write controllers.
33089 Changes in version 0.1.0.7-rc - 2005-05-17
33091 - Fix a bug in the OS X package installer that prevented it from
33092 installing on Tiger.
33093 - Fix a script bug in the OS X package installer that made it
33094 complain during installation.
33095 - Find libevent even if it's hiding in /usr/local/ and your
33096 CFLAGS and LDFLAGS don't tell you to look there.
33097 - Be able to link with libevent as a shared library (the default
33098 after 1.0d), even if it's hiding in /usr/local/lib and even
33099 if you haven't added /usr/local/lib to your /etc/ld.so.conf,
33100 assuming you're running gcc. Otherwise fail and give a useful
33102 - Fix a bug in the RPM packager: set home directory for _tor to
33103 something more reasonable when first installing.
33104 - Free a minor amount of memory that is still reachable on exit.
33107 Changes in version 0.1.0.6-rc - 2005-05-14
33109 - Implement --disable-threads configure option. Disable threads on
33110 netbsd by default, because it appears to have no reentrant resolver
33112 - Apple's OS X 10.4.0 ships with a broken kqueue. The new libevent
33113 release (1.1) detects and disables kqueue if it's broken.
33114 - Append default exit policy before checking for implicit internal
33115 addresses. Now we don't log a bunch of complaints on startup
33116 when using the default exit policy.
33117 - Some people were putting "Address " in their torrc, and they had
33118 a buggy resolver that resolved " " to 0.0.0.0. Oops.
33119 - If DataDir is ~/.tor, and that expands to /.tor, then default to
33120 LOCALSTATEDIR/tor instead.
33121 - Fix fragmented-message bug in TorControl.py.
33122 - Resolve a minor bug which would prevent unreachable dirports
33123 from getting suppressed in the published descriptor.
33124 - When the controller gave us a new descriptor, we weren't resolving
33125 it immediately, so Tor would think its address was 0.0.0.0 until
33126 we fetched a new directory.
33127 - Fix an uppercase/lowercase case error in suppressing a bogus
33128 libevent warning on some Linuxes.
33131 - Begin scrubbing sensitive strings from logs by default. Turn off
33132 the config option SafeLogging if you need to do debugging.
33133 - Switch to a new buffer management algorithm, which tries to avoid
33134 reallocing and copying quite as much. In first tests it looks like
33135 it uses *more* memory on average, but less cpu.
33136 - First cut at support for "create-fast" cells. Clients can use
33137 these when extending to their first hop, since the TLS already
33138 provides forward secrecy and authentication. Not enabled on
33140 - When dirservers refuse a router descriptor, we now log its
33141 contactinfo, platform, and the poster's IP address.
33142 - Call tor_free_all instead of connections_free_all after forking, to
33143 save memory on systems that need to fork.
33144 - Whine at you if you're a server and you don't set your contactinfo.
33145 - Implement --verify-config command-line option to check if your torrc
33146 is valid without actually launching Tor.
33147 - Rewrite address "serifos.exit" to "localhost.serifos.exit"
33148 rather than just rejecting it.
33151 Changes in version 0.1.0.5-rc - 2005-04-27
33153 - Stop trying to print a null pointer if an OR conn fails because
33154 we didn't like its cert.
33156 - Switch our internal buffers implementation to use a ring buffer,
33157 to hopefully improve performance for fast servers a lot.
33158 - Add HttpsProxyAuthenticator support (basic auth only), based
33159 on patch from Adam Langley.
33160 - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
33161 the fast servers that have been joining lately.
33162 - Give hidden service accesses extra time on the first attempt,
33163 since 60 seconds is often only barely enough. This might improve
33165 - Improve performance for dirservers: stop re-parsing the whole
33166 directory every time you regenerate it.
33167 - Add more debugging info to help us find the weird dns freebsd
33168 pthreads bug; cleaner debug messages to help track future issues.
33171 Changes in version 0.0.9.9 - 2005-04-23
33172 o Bugfixes on 0.0.9.x:
33173 - If unofficial Tor clients connect and send weird TLS certs, our
33174 Tor server triggers an assert. This release contains a minimal
33175 backport from the broader fix that we put into 0.1.0.4-rc.
33178 Changes in version 0.1.0.4-rc - 2005-04-23
33180 - If unofficial Tor clients connect and send weird TLS certs, our
33181 Tor server triggers an assert. Stop asserting, and start handling
33182 TLS errors better in other situations too.
33183 - When the controller asks us to tell it about all the debug-level
33184 logs, it turns out we were generating debug-level logs while
33185 telling it about them, which turns into a bad loop. Now keep
33186 track of whether you're sending a debug log to the controller,
33187 and don't log when you are.
33188 - Fix the "postdescriptor" feature of the controller interface: on
33189 non-complete success, only say "done" once.
33191 - Clients are now willing to load balance over up to 2mB, not 1mB,
33192 of advertised bandwidth capacity.
33193 - Add a NoPublish config option, so you can be a server (e.g. for
33194 testing running Tor servers in other Tor networks) without
33195 publishing your descriptor to the primary dirservers.
33198 Changes in version 0.1.0.3-rc - 2005-04-08
33199 o Improvements on 0.1.0.2-rc:
33200 - Client now retries when streams end early for 'hibernating' or
33201 'resource limit' reasons, rather than failing them.
33202 - More automated handling for dirserver operators:
33203 - Automatically approve nodes running 0.1.0.2-rc or later,
33204 now that the the reachability detection stuff is working.
33205 - Now we allow two unverified servers with the same nickname
33206 but different keys. But if a nickname is verified, only that
33207 nickname+key are allowed.
33208 - If you're an authdirserver connecting to an address:port,
33209 and it's not the OR you were expecting, forget about that
33210 descriptor. If he *was* the one you were expecting, then forget
33211 about all other descriptors for that address:port.
33212 - Allow servers to publish descriptors from 12 hours in the future.
33213 Corollary: only whine about clock skew from the dirserver if
33214 he's a trusted dirserver (since now even verified servers could
33215 have quite wrong clocks).
33216 - Adjust maximum skew and age for rendezvous descriptors: let skew
33217 be 48 hours rather than 90 minutes.
33218 - Efficiency improvements:
33219 - Keep a big splay tree of (circid,orconn)->circuit mappings to make
33220 it much faster to look up a circuit for each relay cell.
33221 - Remove most calls to assert_all_pending_dns_resolves_ok(),
33222 since they're eating our cpu on exit nodes.
33223 - Stop wasting time doing a case insensitive comparison for every
33224 dns name every time we do any lookup. Canonicalize the names to
33225 lowercase and be done with it.
33226 - Start sending 'truncated' cells back rather than destroy cells,
33227 if the circuit closes in front of you. This means we won't have
33228 to abandon partially built circuits.
33229 - Only warn once per nickname from add_nickname_list_to_smartlist
33230 per failure, so an entrynode or exitnode choice that's down won't
33232 - Put a note in the torrc about abuse potential with the default
33234 - Revise control spec and implementation to allow all log messages to
33235 be sent to controller with their severities intact (suggested by
33236 Matt Edman). Update TorControl to handle new log event types.
33237 - Provide better explanation messages when controller's POSTDESCRIPTOR
33239 - Stop putting nodename in the Platform string in server descriptors.
33240 It doesn't actually help, and it is confusing/upsetting some people.
33242 o Bugfixes on 0.1.0.2-rc:
33243 - We were printing the host mask wrong in exit policies in server
33244 descriptors. This isn't a critical bug though, since we were still
33245 obeying the exit policy internally.
33246 - Fix Tor when compiled with libevent but without pthreads: move
33247 connection_unregister() from _connection_free() to
33249 - Fix an assert trigger (already fixed in 0.0.9.x): when we have
33250 the rare mysterious case of accepting a conn on 0.0.0.0:0, then
33251 when we look through the connection array, we'll find any of the
33252 cpu/dnsworkers. This is no good.
33254 o Bugfixes on 0.0.9.8:
33255 - Fix possible bug on threading platforms (e.g. win32) which was
33256 leaking a file descriptor whenever a cpuworker or dnsworker died.
33257 - When using preferred entry or exit nodes, ignore whether the
33258 circuit wants uptime or capacity. They asked for the nodes, they
33260 - chdir() to your datadirectory at the *end* of the daemonize process,
33261 not the beginning. This was a problem because the first time you
33262 run tor, if your datadir isn't there, and you have runasdaemon set
33263 to 1, it will try to chdir to it before it tries to create it. Oops.
33264 - Handle changed router status correctly when dirserver reloads
33265 fingerprint file. We used to be dropping all unverified descriptors
33266 right then. The bug was hidden because we would immediately
33267 fetch a directory from another dirserver, which would include the
33268 descriptors we just dropped.
33269 - When we're connecting to an OR and he's got a different nickname/key
33270 than we were expecting, only complain loudly if we're an OP or a
33271 dirserver. Complaining loudly to the OR admins just confuses them.
33272 - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
33273 artificially capped at 500kB.
33276 Changes in version 0.0.9.8 - 2005-04-07
33277 o Bugfixes on 0.0.9.x:
33278 - We have a bug that I haven't found yet. Sometimes, very rarely,
33279 cpuworkers get stuck in the 'busy' state, even though the cpuworker
33280 thinks of itself as idle. This meant that no new circuits ever got
33281 established. Here's a workaround to kill any cpuworker that's been
33282 busy for more than 100 seconds.
33285 Changes in version 0.1.0.2-rc - 2005-04-01
33286 o Bugfixes on 0.1.0.1-rc:
33287 - Fixes on reachability detection:
33288 - Don't check for reachability while hibernating.
33289 - If ORPort is reachable but DirPort isn't, still publish the
33290 descriptor, but zero out DirPort until it's found reachable.
33291 - When building testing circs for ORPort testing, use only
33292 high-bandwidth nodes, so fewer circuits fail.
33293 - Complain about unreachable ORPort separately from unreachable
33294 DirPort, so the user knows what's going on.
33295 - Make sure we only conclude ORPort reachability if we didn't
33296 initiate the conn. Otherwise we could falsely conclude that
33297 we're reachable just because we connected to the guy earlier
33298 and he used that same pipe to extend to us.
33299 - Authdirservers shouldn't do ORPort reachability detection,
33300 since they're in clique mode, so it will be rare to find a
33301 server not already connected to them.
33302 - When building testing circuits, always pick middle hops running
33303 Tor 0.0.9.7, so we avoid the "can't extend to unknown routers"
33304 bug. (This is a kludge; it will go away when 0.0.9.x becomes
33306 - When we decide we're reachable, actually publish our descriptor
33308 - Fix bug in redirectstream in the controller.
33309 - Fix the state descriptor strings so logs don't claim edge streams
33310 are in a different state than they actually are.
33311 - Use recent libevent features when possible (this only really affects
33312 win32 and osx right now, because the new libevent with these
33313 features hasn't been released yet). Add code to suppress spurious
33315 - Prevent possible segfault in connection_close_unattached_ap().
33316 - Fix newlines on torrc in win32.
33317 - Improve error msgs when tor-resolve fails.
33319 o Improvements on 0.0.9.x:
33320 - New experimental script tor/contrib/ExerciseServer.py (needs more
33321 work) that uses the controller interface to build circuits and
33322 fetch pages over them. This will help us bootstrap servers that
33323 have lots of capacity but haven't noticed it yet.
33324 - New experimental script tor/contrib/PathDemo.py (needs more work)
33325 that uses the controller interface to let you choose whole paths
33327 "<hostname>.<path,separated by dots>.<length of path>.path"
33328 - When we've connected to an OR and handshaked but didn't like
33329 the result, we were closing the conn without sending destroy
33330 cells back for pending circuits. Now send those destroys.
33333 Changes in version 0.0.9.7 - 2005-04-01
33334 o Bugfixes on 0.0.9.x:
33335 - Fix another race crash bug (thanks to Glenn Fink for reporting).
33336 - Compare identity to identity, not to nickname, when extending to
33337 a router not already in the directory. This was preventing us from
33338 extending to unknown routers. Oops.
33339 - Make sure to create OS X Tor user in <500 range, so we aren't
33340 creating actual system users.
33341 - Note where connection-that-hasn't-sent-end was marked, and fix
33342 a few really loud instances of this harmless bug (it's fixed more
33346 Changes in version 0.1.0.1-rc - 2005-03-28
33348 - Add reachability testing. Your Tor server will automatically try
33349 to see if its ORPort and DirPort are reachable from the outside,
33350 and it won't upload its descriptor until it decides they are.
33351 - Handle unavailable hidden services better. Handle slow or busy
33352 hidden services better.
33353 - Add support for CONNECTing through https proxies, with "HttpsProxy"
33355 - New exit policy: accept most low-numbered ports, rather than
33356 rejecting most low-numbered ports.
33357 - More Tor controller support (still experimental). See
33358 http://tor.eff.org/doc/control-spec.txt for all the new features,
33359 including signals to emulate unix signals from any platform;
33360 redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
33361 closestream; closecircuit; etc.
33362 - Make nt services work and start on startup on win32 (based on
33363 patch by Matt Edman).
33364 - Add a new AddressMap config directive to rewrite incoming socks
33365 addresses. This lets you, for example, declare an implicit
33366 required exit node for certain sites.
33367 - Add a new TrackHostExits config directive to trigger addressmaps
33368 for certain incoming socks addresses -- for sites that break when
33369 your exit keeps changing (based on patch by Mike Perry).
33370 - Redo the client-side dns cache so it's just an addressmap too.
33371 - Notice when our IP changes, and reset stats/uptime/reachability.
33372 - When an application is using socks5, give him the whole variety of
33373 potential socks5 responses (connect refused, host unreachable, etc),
33374 rather than just "success" or "failure".
33375 - A more sane version numbering system. See
33376 http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
33377 - New contributed script "exitlist": a simple python script to
33378 parse directories and find Tor nodes that exit to listed
33380 - New contributed script "privoxy-tor-toggle" to toggle whether
33381 Privoxy uses Tor. Seems to be configured for Debian by default.
33382 - Report HTTP reasons to client when getting a response from directory
33383 servers -- so you can actually know what went wrong.
33384 - New config option MaxAdvertisedBandwidth which lets you advertise
33385 a low bandwidthrate (to not attract as many circuits) while still
33386 allowing a higher bandwidthrate in reality.
33388 o Robustness/stability fixes:
33389 - Make Tor use Niels Provos's libevent instead of its current
33390 poll-but-sometimes-select mess. This will let us use faster async
33391 cores (like epoll, kpoll, and /dev/poll), and hopefully work better
33393 - pthread support now too. This was forced because when we forked,
33394 we ended up wasting a lot of duplicate ram over time. Also switch
33395 to foo_r versions of some library calls to allow reentry and
33397 - Better handling for heterogeneous / unreliable nodes:
33398 - Annotate circuits w/ whether they aim to contain high uptime nodes
33399 and/or high capacity nodes. When building circuits, choose
33401 - This means that every single node in an intro rend circuit,
33402 not just the last one, will have a minimum uptime.
33403 - New config option LongLivedPorts to indicate application streams
33404 that will want high uptime circuits.
33405 - Servers reset uptime when a dir fetch entirely fails. This
33406 hopefully reflects stability of the server's network connectivity.
33407 - If somebody starts his tor server in Jan 2004 and then fixes his
33408 clock, don't make his published uptime be a year.
33409 - Reset published uptime when you wake up from hibernation.
33410 - Introduce a notion of 'internal' circs, which are chosen without
33411 regard to the exit policy of the last hop. Intro and rendezvous
33412 circs must be internal circs, to avoid leaking information. Resolve
33413 and connect streams can use internal circs if they want.
33414 - New circuit pooling algorithm: make sure to have enough circs around
33415 to satisfy any predicted ports, and also make sure to have 2 internal
33416 circs around if we've required internal circs lately (and with high
33417 uptime if we've seen that lately too).
33418 - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
33419 which describes how often we retry making new circuits if current
33420 ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
33421 how long we're willing to make use of an already-dirty circuit.
33422 - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
33423 circ as necessary, if there are any completed ones lying around
33424 when we try to launch one.
33425 - Make hidden services try to establish a rendezvous for 30 seconds,
33426 rather than for n (where n=3) attempts to build a circuit.
33427 - Change SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to a config option
33428 "ShutdownWaitLength".
33429 - Try to be more zealous about calling connection_edge_end when
33430 things go bad with edge conns in connection.c.
33431 - Revise tor-spec to add more/better stream end reasons.
33432 - Revise all calls to connection_edge_end to avoid sending "misc",
33433 and to take errno into account where possible.
33436 - Fix a race condition that can trigger an assert, when we have a
33437 pending create cell and an OR connection fails right then.
33438 - Fix several double-mark-for-close bugs, e.g. where we were finding
33439 a conn for a cell even if that conn is already marked for close.
33440 - Make sequence of log messages when starting on win32 with no config
33441 file more reasonable.
33442 - When choosing an exit node for a new non-internal circ, don't take
33443 into account whether it'll be useful for any pending x.onion
33444 addresses -- it won't.
33445 - Turn addr_policy_compare from a tristate to a quadstate; this should
33446 help address our "Ah, you allow 1.2.3.4:80. You are a good choice
33447 for google.com" problem.
33448 - Make "platform" string in descriptor more accurate for Win32 servers,
33449 so it's not just "unknown platform".
33450 - Fix an edge case in parsing config options (thanks weasel).
33451 If they say "--" on the commandline, it's not an option.
33452 - Reject odd-looking addresses at the client (e.g. addresses that
33453 contain a colon), rather than having the server drop them because
33455 - tor-resolve requests were ignoring .exit if there was a working circuit
33456 they could use instead.
33457 - REUSEADDR on normal platforms means you can rebind to the port
33458 right after somebody else has let it go. But REUSEADDR on win32
33459 means to let you bind to the port _even when somebody else
33460 already has it bound_! So, don't do that on Win32.
33461 - Change version parsing logic: a version is "obsolete" if it is not
33462 recommended and (1) there is a newer recommended version in the
33463 same series, or (2) there are no recommended versions in the same
33464 series, but there are some recommended versions in a newer series.
33465 A version is "new" if it is newer than any recommended version in
33467 - Stop most cases of hanging up on a socks connection without sending
33471 - Require BandwidthRate to be at least 20kB/s for servers.
33472 - When a dirserver causes you to give a warn, mention which dirserver
33474 - New config option DirAllowPrivateAddresses for authdirservers.
33475 Now by default they refuse router descriptors that have non-IP or
33476 private-IP addresses.
33477 - Stop publishing socksport in the directory, since it's not
33478 actually meant to be public. For compatibility, publish a 0 there
33480 - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
33481 smart" value, that is low for servers and high for clients.
33482 - If our clock jumps forward by 100 seconds or more, assume something
33483 has gone wrong with our network and abandon all not-yet-used circs.
33484 - Warn when exit policy implicitly allows local addresses.
33485 - If we get an incredibly skewed timestamp from a dirserver mirror
33486 that isn't a verified OR, don't warn -- it's probably him that's
33488 - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
33489 cookies to disk and doesn't log each web request to disk. (Thanks
33490 to Brett Carrington for pointing this out.)
33491 - When a client asks us for a dir mirror and we don't have one,
33492 launch an attempt to get a fresh one.
33493 - If we're hibernating and we get a SIGINT, exit immediately.
33494 - Add --with-dmalloc ./configure option, to track memory leaks.
33495 - And try to free all memory on closing, so we can detect what
33497 - Cache local dns resolves correctly even when they're .exit
33499 - Give a better warning when some other server advertises an
33500 ORPort that is actually an apache running ssl.
33501 - Add "opt hibernating 1" to server descriptor to make it clearer
33502 whether the server is hibernating.
33505 Changes in version 0.0.9.6 - 2005-03-24
33506 o Bugfixes on 0.0.9.x (crashes and asserts):
33507 - Add new end stream reasons to maintenance branch. Fix bug where
33508 reason (8) could trigger an assert. Prevent bug from recurring.
33509 - Apparently win32 stat wants paths to not end with a slash.
33510 - Fix assert triggers in assert_cpath_layer_ok(), where we were
33511 blowing away the circuit that conn->cpath_layer points to, then
33512 checking to see if the circ is well-formed. Backport check to make
33513 sure we dont use the cpath on a closed connection.
33514 - Prevent circuit_resume_edge_reading_helper() from trying to package
33515 inbufs for marked-for-close streams.
33516 - Don't crash on hup if your options->address has become unresolvable.
33517 - Some systems (like OS X) sometimes accept() a connection and tell
33518 you the remote host is 0.0.0.0:0. If this happens, due to some
33519 other mis-features, we get confused; so refuse the conn for now.
33521 o Bugfixes on 0.0.9.x (other):
33522 - Fix harmless but scary "Unrecognized content encoding" warn message.
33523 - Add new stream error reason: TORPROTOCOL reason means "you are not
33524 speaking a version of Tor I understand; say bye-bye to your stream."
33525 - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
33526 into the future, now that we are more tolerant of skew. This
33527 resolves a bug where a Tor server would refuse to cache a directory
33528 because all the directories it gets are too far in the future;
33529 yet the Tor server never logs any complaints about clock skew.
33530 - Mac packaging magic: make man pages useable, and do not overwrite
33531 existing torrc files.
33532 - Make OS X log happily to /var/log/tor/tor.log
33535 Changes in version 0.0.9.5 - 2005-02-22
33536 o Bugfixes on 0.0.9.x:
33537 - Fix an assert race at exit nodes when resolve requests fail.
33538 - Stop picking unverified dir mirrors--it only leads to misery.
33539 - Patch from Matt Edman to make NT services work better. Service
33540 support is still not compiled into the executable by default.
33541 - Patch from Dmitri Bely so the Tor service runs better under
33542 the win32 SYSTEM account.
33543 - Make tor-resolve actually work (?) on Win32.
33544 - Fix a sign bug when getrlimit claims to have 4+ billion
33545 file descriptors available.
33546 - Stop refusing to start when bandwidthburst == bandwidthrate.
33547 - When create cells have been on the onion queue more than five
33548 seconds, just send back a destroy and take them off the list.
33551 Changes in version 0.0.9.4 - 2005-02-03
33552 o Bugfixes on 0.0.9:
33553 - Fix an assert bug that took down most of our servers: when
33554 a server claims to have 1 GB of bandwidthburst, don't
33556 - Don't crash as badly if we have spawned the max allowed number
33557 of dnsworkers, or we're out of file descriptors.
33558 - Block more file-sharing ports in the default exit policy.
33559 - MaxConn is now automatically set to the hard limit of max
33560 file descriptors we're allowed (ulimit -n), minus a few for
33562 - Give a clearer message when servers need to raise their
33563 ulimit -n when they start running out of file descriptors.
33564 - SGI Compatibility patches from Jan Schaumann.
33565 - Tolerate a corrupt cached directory better.
33566 - When a dirserver hasn't approved your server, list which one.
33567 - Go into soft hibernation after 95% of the bandwidth is used,
33568 not 99%. This is especially important for daily hibernators who
33569 have a small accounting max. Hopefully it will result in fewer
33570 cut connections when the hard hibernation starts.
33571 - Load-balance better when using servers that claim more than
33572 800kB/s of capacity.
33573 - Make NT services work (experimental, only used if compiled in).
33576 Changes in version 0.0.9.3 - 2005-01-21
33577 o Bugfixes on 0.0.9:
33578 - Backport the cpu use fixes from main branch, so busy servers won't
33579 need as much processor time.
33580 - Work better when we go offline and then come back, or when we
33581 run Tor at boot before the network is up. We do this by
33582 optimistically trying to fetch a new directory whenever an
33583 application request comes in and we think we're offline -- the
33584 human is hopefully a good measure of when the network is back.
33585 - Backport some minimal hidserv bugfixes: keep rend circuits open as
33586 long as you keep using them; actually publish hidserv descriptors
33587 shortly after they change, rather than waiting 20-40 minutes.
33588 - Enable Mac startup script by default.
33589 - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
33590 - When you update AllowUnverifiedNodes or FirewallPorts via the
33591 controller's setconf feature, we were always appending, never
33593 - When you update HiddenServiceDir via setconf, it was screwing up
33594 the order of reading the lines, making it fail.
33595 - Do not rewrite a cached directory back to the cache; otherwise we
33596 will think it is recent and not fetch a newer one on startup.
33597 - Workaround for webservers that lie about Content-Encoding: Tor
33598 now tries to autodetect compressed directories and compression
33599 itself. This lets us Proxypass dir fetches through apache.
33602 Changes in version 0.0.9.2 - 2005-01-04
33603 o Bugfixes on 0.0.9 (crashes and asserts):
33604 - Fix an assert on startup when the disk is full and you're logging
33606 - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
33607 style address, then we'd crash.
33608 - Fix an assert trigger when the running-routers string we get from
33609 a dirserver is broken.
33610 - Make worker threads start and run on win32. Now win32 servers
33612 - Bandaid (not actually fix, but now it doesn't crash) an assert
33613 where the dns worker dies mysteriously and the main Tor process
33614 doesn't remember anything about the address it was resolving.
33616 o Bugfixes on 0.0.9 (Win32):
33617 - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
33618 name out of the warning/assert messages.
33619 - Fix a superficial "unhandled error on read" bug on win32.
33620 - The win32 installer no longer requires a click-through for our
33621 license, since our Free Software license grants rights but does not
33623 - Win32: When connecting to a dirserver fails, try another one
33624 immediately. (This was already working for non-win32 Tors.)
33625 - Stop trying to parse $HOME on win32 when hunting for default
33627 - Make tor-resolve.c work on win32 by calling network_init().
33629 o Bugfixes on 0.0.9 (other):
33630 - Make 0.0.9.x build on Solaris again.
33631 - Due to a fencepost error, we were blowing away the \n when reporting
33632 confvalue items in the controller. So asking for multiple config
33633 values at once couldn't work.
33634 - When listing circuits that are pending on an opening OR connection,
33635 if we're an OR we were listing circuits that *end* at us as
33636 being pending on every listener, dns/cpu worker, etc. Stop that.
33637 - Dirservers were failing to create 'running-routers' or 'directory'
33638 strings if we had more than some threshold of routers. Fix them so
33639 they can handle any number of routers.
33640 - Fix a superficial "Duplicate mark for close" bug.
33641 - Stop checking for clock skew for OR connections, even for servers.
33642 - Fix a fencepost error that was chopping off the last letter of any
33643 nickname that is the maximum allowed nickname length.
33644 - Update URLs in log messages so they point to the new website.
33645 - Fix a potential problem in mangling server private keys while
33646 writing to disk (not triggered yet, as far as we know).
33647 - Include the licenses for other free software we include in Tor,
33648 now that we're shipping binary distributions more regularly.
33651 Changes in version 0.0.9.1 - 2004-12-15
33652 o Bugfixes on 0.0.9:
33653 - Make hibernation actually work.
33654 - Make HashedControlPassword config option work.
33655 - When we're reporting event circuit status to a controller,
33656 don't use the stream status code.
33659 Changes in version 0.0.9 - 2004-12-12
33661 - Clean up manpage and torrc.sample file.
33662 - Clean up severities and text of log warnings.
33664 - Make servers trigger an assert when they enter hibernation.
33667 Changes in version 0.0.9rc7 - 2004-12-08
33668 o Bugfixes on 0.0.9rc:
33669 - Fix a stack-trashing crash when an exit node begins hibernating.
33670 - Avoid looking at unallocated memory while considering which
33671 ports we need to build circuits to cover.
33672 - Stop a sigpipe: when an 'end' cell races with eof from the app,
33673 we shouldn't hold-open-until-flush if the eof arrived first.
33674 - Fix a bug with init_cookie_authentication() in the controller.
33675 - When recommending new-format log lines, if the upper bound is
33676 LOG_ERR, leave it implicit.
33678 o Bugfixes on 0.0.8.1:
33679 - Fix a whole slew of memory leaks.
33680 - Fix isspace() and friends so they still make Solaris happy
33681 but also so they don't trigger asserts on win32.
33682 - Fix parse_iso_time on platforms without strptime (eg win32).
33683 - win32: tolerate extra "readable" events better.
33684 - win32: when being multithreaded, leave parent fdarray open.
33685 - Make unit tests work on win32.
33688 Changes in version 0.0.9rc6 - 2004-12-06
33689 o Bugfixes on 0.0.9pre:
33690 - Clean up some more integer underflow opportunities (not exploitable
33692 - While hibernating, hup should not regrow our listeners.
33693 - Send an end to the streams we close when we hibernate, rather
33694 than just chopping them off.
33695 - React to eof immediately on non-open edge connections.
33697 o Bugfixes on 0.0.8.1:
33698 - Calculate timeout for waiting for a connected cell from the time
33699 we sent the begin cell, not from the time the stream started. If
33700 it took a long time to establish the circuit, we would time out
33701 right after sending the begin cell.
33702 - Fix router_compare_addr_to_addr_policy: it was not treating a port
33703 of * as always matching, so we were picking reject *:* nodes as
33704 exit nodes too. Oops.
33707 - New circuit building strategy: keep a list of ports that we've
33708 used in the past 6 hours, and always try to have 2 circuits open
33709 or on the way that will handle each such port. Seed us with port
33710 80 so web users won't complain that Tor is "slow to start up".
33711 - Make kill -USR1 dump more useful stats about circuits.
33712 - When warning about retrying or giving up, print the address, so
33713 the user knows which one it's talking about.
33714 - If you haven't used a clean circuit in an hour, throw it away,
33715 just to be on the safe side. (This means after 6 hours a totally
33716 unused Tor client will have no circuits open.)
33719 Changes in version 0.0.9rc5 - 2004-12-01
33720 o Bugfixes on 0.0.8.1:
33721 - Disallow NDEBUG. We don't ever want anybody to turn off debug.
33722 - Let resolve conns retry/expire also, rather than sticking around
33724 - If we are using select, make sure we stay within FD_SETSIZE.
33726 o Bugfixes on 0.0.9pre:
33727 - Fix integer underflow in tor_vsnprintf() that may be exploitable,
33728 but doesn't seem to be currently; thanks to Ilja van Sprundel for
33730 - If anybody set DirFetchPostPeriod, give them StatusFetchPeriod
33731 instead. Impose minima and maxima for all *Period options; impose
33732 even tighter maxima for fetching if we are a caching dirserver.
33733 Clip rather than rejecting.
33734 - Fetch cached running-routers from servers that serve it (that is,
33735 authdirservers and servers running 0.0.9rc5-cvs or later.)
33738 - Accept *:706 (silc) in default exit policy.
33739 - Implement new versioning format for post 0.1.
33740 - Support "foo.nickname.exit" addresses, to let Alice request the
33741 address "foo" as viewed by exit node "nickname". Based on a patch
33743 - Make tor --version --version dump the cvs Id of every file.
33746 Changes in version 0.0.9rc4 - 2004-11-28
33747 o Bugfixes on 0.0.8.1:
33748 - Make windows sockets actually non-blocking (oops), and handle
33749 win32 socket errors better.
33751 o Bugfixes on 0.0.9rc1:
33752 - Actually catch the -USR2 signal.
33755 Changes in version 0.0.9rc3 - 2004-11-25
33756 o Bugfixes on 0.0.8.1:
33757 - Flush the log file descriptor after we print "Tor opening log file",
33758 so we don't see those messages days later.
33760 o Bugfixes on 0.0.9rc1:
33761 - Make tor-resolve work again.
33762 - Avoid infinite loop in tor-resolve if tor hangs up on it.
33763 - Fix an assert trigger for clients/servers handling resolves.
33766 Changes in version 0.0.9rc2 - 2004-11-24
33767 o Bugfixes on 0.0.9rc1:
33768 - I broke socks5 support while fixing the eof bug.
33769 - Allow unitless bandwidths and intervals; they default to bytes
33771 - New servers don't start out hibernating; they are active until
33772 they run out of bytes, so they have a better estimate of how
33773 long it takes, and so their operators can know they're working.
33776 Changes in version 0.0.9rc1 - 2004-11-23
33777 o Bugfixes on 0.0.8.1:
33778 - Finally fix a bug that's been plaguing us for a year:
33779 With high load, circuit package window was reaching 0. Whenever
33780 we got a circuit-level sendme, we were reading a lot on each
33781 socket, but only writing out a bit. So we would eventually reach
33782 eof. This would be noticed and acted on even when there were still
33783 bytes sitting in the inbuf.
33784 - When poll() is interrupted, we shouldn't believe the revents values.
33786 o Bugfixes on 0.0.9pre6:
33787 - Fix hibernate bug that caused pre6 to be broken.
33788 - Don't keep rephist info for routers that haven't had activity for
33789 24 hours. (This matters now that clients have keys, since we track
33791 - Never call close_temp_logs while validating log options.
33792 - Fix backslash-escaping on tor.sh.in and torctl.in.
33795 - Implement weekly/monthly/daily accounting: now you specify your
33796 hibernation properties by
33797 AccountingMax N bytes|KB|MB|GB|TB
33798 AccountingStart day|week|month [day] HH:MM
33799 Defaults to "month 1 0:00".
33800 - Let bandwidth and interval config options be specified as 5 bytes,
33801 kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
33802 - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
33803 get back to normal.)
33804 - If your requested entry or exit node has advertised bandwidth 0,
33806 - Be more greedy about filling up relay cells -- we try reading again
33807 once we've processed the stuff we read, in case enough has arrived
33808 to fill the last cell completely.
33809 - Apply NT service patch from Osamu Fujino. Still needs more work.
33812 Changes in version 0.0.9pre6 - 2004-11-15
33813 o Bugfixes on 0.0.8.1:
33814 - Fix assert failure on malformed socks4a requests.
33815 - Use identity comparison, not nickname comparison, to choose which
33816 half of circuit-ID-space each side gets to use. This is needed
33817 because sometimes we think of a router as a nickname, and sometimes
33818 as a hex ID, and we can't predict what the other side will do.
33819 - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
33820 write() call will fail and we handle it there.
33821 - Add a FAST_SMARTLIST define to optionally inline smartlist_get
33822 and smartlist_len, which are two major profiling offenders.
33824 o Bugfixes on 0.0.9pre5:
33825 - Fix a bug in read_all that was corrupting config files on windows.
33826 - When we're raising the max number of open file descriptors to
33827 'unlimited', don't log that we just raised it to '-1'.
33828 - Include event code with events, as required by control-spec.txt.
33829 - Don't give a fingerprint when clients do --list-fingerprint:
33830 it's misleading, because it will never be the same again.
33831 - Stop using strlcpy in tor_strndup, since it was slowing us
33833 - Remove warn on startup about missing cached-directory file.
33834 - Make kill -USR1 work again.
33835 - Hibernate if we start tor during the "wait for wakeup-time" phase
33836 of an accounting interval. Log our hibernation plans better.
33837 - Authoritative dirservers now also cache their directory, so they
33838 have it on start-up.
33841 - Fetch running-routers; cache running-routers; compress
33842 running-routers; serve compressed running-routers.z
33843 - Add NSI installer script contributed by J Doe.
33844 - Commit VC6 and VC7 workspace/project files.
33845 - Commit a tor.spec for making RPM files, with help from jbash.
33846 - Add contrib/torctl.in contributed by Glenn Fink.
33847 - Implement the control-spec's SAVECONF command, to write your
33848 configuration to torrc.
33849 - Get cookie authentication for the controller closer to working.
33850 - Include control-spec.txt in the tarball.
33851 - When set_conf changes our server descriptor, upload a new copy.
33852 But don't upload it too often if there are frequent changes.
33853 - Document authentication config in man page, and document signals
33855 - Clean up confusing parts of man page and torrc.sample.
33856 - Make expand_filename handle ~ and ~username.
33857 - Use autoconf to enable largefile support where necessary. Use
33858 ftello where available, since ftell can fail at 2GB.
33859 - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
33860 log more informatively.
33861 - Give a slightly more useful output for "tor -h".
33862 - Refuse application socks connections to port 0.
33863 - Check clock skew for verified servers, but allow unverified
33864 servers and clients to have any clock skew.
33865 - Break DirFetchPostPeriod into:
33866 - DirFetchPeriod for fetching full directory,
33867 - StatusFetchPeriod for fetching running-routers,
33868 - DirPostPeriod for posting server descriptor,
33869 - RendPostPeriod for posting hidden service descriptors.
33870 - Make sure the hidden service descriptors are at a random offset
33871 from each other, to hinder linkability.
33874 Changes in version 0.0.9pre5 - 2004-11-09
33875 o Bugfixes on 0.0.9pre4:
33876 - Fix a seg fault in unit tests (doesn't affect main program).
33877 - Fix an assert bug where a hidden service provider would fail if
33878 the first hop of his rendezvous circuit was down.
33879 - Hidden service operators now correctly handle version 1 style
33880 INTRODUCE1 cells (nobody generates them still, so not a critical
33882 - If do_hup fails, actually notice.
33883 - Handle more errnos from accept() without closing the listener.
33884 Some OpenBSD machines were closing their listeners because
33885 they ran out of file descriptors.
33886 - Send resolve cells to exit routers that are running a new
33887 enough version of the resolve code to work right.
33888 - Better handling of winsock includes on non-MSV win32 compilers.
33889 - Some people had wrapped their tor client/server in a script
33890 that would restart it whenever it died. This did not play well
33891 with our "shut down if your version is obsolete" code. Now people
33892 don't fetch a new directory if their local cached version is
33894 - Make our autogen.sh work on ksh as well as bash.
33897 - Hibernation: New config option "AccountingMaxKB" lets you
33898 set how many KBytes per month you want to allow your server to
33899 consume. Rather than spreading those bytes out evenly over the
33900 month, we instead hibernate for some of the month and pop up
33901 at a deterministic time, work until the bytes are consumed, then
33902 hibernate again. Config option "MonthlyAccountingStart" lets you
33903 specify which day of the month your billing cycle starts on.
33904 - Control interface: a separate program can now talk to your
33905 client/server over a socket, and get/set config options, receive
33906 notifications of circuits and streams starting/finishing/dying,
33907 bandwidth used, etc. The next step is to get some GUIs working.
33908 Let us know if you want to help out. See doc/control-spec.txt .
33909 - Ship a contrib/tor-control.py as an example script to interact
33910 with the control port.
33911 - "tor --hash-password zzyxz" will output a salted password for
33912 use in authenticating to the control interface.
33913 - New log format in config:
33914 "Log minsev[-maxsev] stdout|stderr|syslog" or
33915 "Log minsev[-maxsev] file /var/foo"
33918 - DirPolicy config option, to let people reject incoming addresses
33919 from their dirserver.
33920 - "tor --list-fingerprint" will list your identity key fingerprint
33922 - Add "pass" target for RedirectExit, to make it easier to break
33923 out of a sequence of RedirectExit rules.
33924 - Clients now generate a TLS cert too, in preparation for having
33925 them act more like real nodes.
33926 - Ship src/win32/ in the tarball, so people can use it to build.
33927 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
33929 - New "router-status" line in directory, to better bind each verified
33930 nickname to its identity key.
33931 - Deprecate unofficial config option abbreviations, and abbreviations
33932 not on the command line.
33933 - Add a pure-C tor-resolve implementation.
33934 - Use getrlimit and friends to ensure we can reach MaxConn (currently
33935 1024) file descriptors.
33937 o Code security improvements, inspired by Ilja:
33938 - Replace sprintf with snprintf. (I think they were all safe, but
33940 - Replace strcpy/strncpy with strlcpy in more places.
33941 - Avoid strcat; use snprintf or strlcat instead.
33942 - snprintf wrapper with consistent (though not C99) overflow behavior.
33945 Changes in version 0.0.9pre4 - 2004-10-17
33946 o Bugfixes on 0.0.9pre3:
33947 - If the server doesn't specify an exit policy, use the real default
33948 exit policy, not reject *:*.
33949 - Ignore fascistfirewall when uploading/downloading hidden service
33950 descriptors, since we go through Tor for those; and when using
33951 an HttpProxy, since we assume it can reach them all.
33952 - When looking for an authoritative dirserver, use only the ones
33953 configured at boot. Don't bother looking in the directory.
33954 - The rest of the fix for get_default_conf_file() on older win32.
33955 - Make 'Routerfile' config option obsolete.
33958 - New 'MyFamily nick1,...' config option for a server to
33959 specify other servers that shouldn't be used in the same circuit
33960 with it. Only believed if nick1 also specifies us.
33961 - New 'NodeFamily nick1,nick2,...' config option for a client to
33962 specify nodes that it doesn't want to use in the same circuit.
33963 - New 'Redirectexit pattern address:port' config option for a
33964 server to redirect exit connections, e.g. to a local squid.
33967 Changes in version 0.0.9pre3 - 2004-10-13
33968 o Bugfixes on 0.0.8.1:
33969 - Better torrc example lines for dirbindaddress and orbindaddress.
33970 - Improved bounds checking on parsed ints (e.g. config options and
33971 the ones we find in directories.)
33972 - Better handling of size_t vs int, so we're more robust on 64
33974 - Fix the rest of the bug where a newly started OR would appear
33975 as unverified even after we've added his fingerprint and hupped
33977 - Fix a bug from 0.0.7: when read() failed on a stream, we would
33978 close it without sending back an end. So 'connection refused'
33979 would simply be ignored and the user would get no response.
33981 o Bugfixes on 0.0.9pre2:
33982 - Serving the cached-on-disk directory to people is bad. We now
33983 provide no directory until we've fetched a fresh one.
33984 - Workaround for bug on windows where cached-directories get crlf
33986 - Make get_default_conf_file() work on older windows too.
33987 - If we write a *:* exit policy line in the descriptor, don't write
33988 any more exit policy lines.
33991 - Use only 0.0.9pre1 and later servers for resolve cells.
33992 - Make the dirservers file obsolete.
33993 - Include a dir-signing-key token in directories to tell the
33994 parsing entity which key is being used to sign.
33995 - Remove the built-in bulky default dirservers string.
33996 - New config option "Dirserver %s:%d [fingerprint]", which can be
33997 repeated as many times as needed. If no dirservers specified,
33998 default to moria1,moria2,tor26.
33999 - Make moria2 advertise a dirport of 80, so people behind firewalls
34000 will be able to get a directory.
34001 - Http proxy support
34002 - Dirservers translate requests for http://%s:%d/x to /x
34003 - You can specify "HttpProxy %s[:%d]" and all dir fetches will
34004 be routed through this host.
34005 - Clients ask for /tor/x rather than /x for new enough dirservers.
34006 This way we can one day coexist peacefully with apache.
34007 - Clients specify a "Host: %s%d" http header, to be compatible
34008 with more proxies, and so running squid on an exit node can work.
34011 Changes in version 0.0.8.1 - 2004-10-13
34013 - Fix a seg fault that can be triggered remotely for Tor
34014 clients/servers with an open dirport.
34015 - Fix a rare assert trigger, where routerinfos for entries in
34016 our cpath would expire while we're building the path.
34017 - Fix a bug in OutboundBindAddress so it (hopefully) works.
34018 - Fix a rare seg fault for people running hidden services on
34019 intermittent connections.
34020 - Fix a bug in parsing opt keywords with objects.
34021 - Fix a stale pointer assert bug when a stream detaches and
34023 - Fix a string format vulnerability (probably not exploitable)
34024 in reporting stats locally.
34025 - Fix an assert trigger: sometimes launching circuits can fail
34026 immediately, e.g. because too many circuits have failed recently.
34027 - Fix a compile warning on 64 bit platforms.
34030 Changes in version 0.0.9pre2 - 2004-10-03
34032 - Make fetching a cached directory work for 64-bit platforms too.
34033 - Make zlib.h a required header, not an optional header.
34036 Changes in version 0.0.9pre1 - 2004-10-01
34038 - Stop using separate defaults for no-config-file and
34039 empty-config-file. Now you have to explicitly turn off SocksPort,
34040 if you don't want it open.
34041 - Fix a bug in OutboundBindAddress so it (hopefully) works.
34042 - Improve man page to mention more of the 0.0.8 features.
34043 - Fix a rare seg fault for people running hidden services on
34044 intermittent connections.
34045 - Change our file IO stuff (especially wrt OpenSSL) so win32 is
34047 - Fix more dns related bugs: send back resolve_failed and end cells
34048 more reliably when the resolve fails, rather than closing the
34049 circuit and then trying to send the cell. Also attach dummy resolve
34050 connections to a circuit *before* calling dns_resolve(), to fix
34051 a bug where cached answers would never be sent in RESOLVED cells.
34052 - When we run out of disk space, or other log writing error, don't
34053 crash. Just stop logging to that log and continue.
34054 - We were starting to daemonize before we opened our logs, so if
34055 there were any problems opening logs, we would complain to stderr,
34056 which wouldn't work, and then mysteriously exit.
34057 - Fix a rare bug where sometimes a verified OR would connect to us
34058 before he'd uploaded his descriptor, which would cause us to
34059 assign conn->nickname as though he's unverified. Now we look through
34060 the fingerprint list to see if he's there.
34061 - Fix a rare assert trigger, where routerinfos for entries in
34062 our cpath would expire while we're building the path.
34065 - Clients can ask dirservers for /dir.z to get a compressed version
34066 of the directory. Only works for servers running 0.0.9, of course.
34067 - Make clients cache directories and use them to seed their router
34068 lists at startup. This means clients have a datadir again.
34069 - Configuration infrastructure support for warning on obsolete
34071 - Respond to content-encoding headers by trying to uncompress as
34073 - Reply with a deflated directory when a client asks for "dir.z".
34074 We could use allow-encodings instead, but allow-encodings isn't
34075 specified in HTTP 1.0.
34076 - Raise the max dns workers from 50 to 100.
34077 - Discourage people from setting their dirfetchpostperiod more often
34078 than once per minute.
34079 - Protect dirservers from overzealous descriptor uploading -- wait
34080 10 seconds after directory gets dirty, before regenerating.
34083 Changes in version 0.0.8 - 2004-08-25
34084 o Port it to SunOS 5.9 / Athena
34087 Changes in version 0.0.8rc2 - 2004-08-20
34088 o Make it compile on cygwin again.
34089 o When picking unverified routers, skip those with low uptime and/or
34090 low bandwidth, depending on what properties you care about.
34093 Changes in version 0.0.8rc1 - 2004-08-18
34094 o Changes from 0.0.7.3:
34096 - Fix assert triggers: if the other side returns an address 0.0.0.0,
34097 don't put it into the client dns cache.
34098 - If a begin failed due to exit policy, but we believe the IP address
34099 should have been allowed, switch that router to exitpolicy reject *:*
34100 until we get our next directory.
34102 - Clients choose nodes proportional to advertised bandwidth.
34103 - Avoid using nodes with low uptime as introduction points.
34104 - Handle servers with dynamic IP addresses: don't replace
34105 options->Address with the resolved one at startup, and
34106 detect our address right before we make a routerinfo each time.
34107 - 'FascistFirewall' option to pick dirservers and ORs on specific
34108 ports; plus 'FirewallPorts' config option to tell FascistFirewall
34109 which ports are open. (Defaults to 80,443)
34110 - Be more aggressive about trying to make circuits when the network
34111 has changed (e.g. when you unsuspend your laptop).
34112 - Check for time skew on http headers; report date in response to
34114 - If the entrynode config line has only one node, don't pick it as
34116 - Add strict{entry|exit}nodes config options. If set to 1, then
34117 we refuse to build circuits that don't include the specified entry
34119 - OutboundBindAddress config option, to bind to a specific
34120 IP address for outgoing connect()s.
34121 - End truncated log entries (e.g. directories) with "[truncated]".
34123 o Patches to 0.0.8preX:
34125 - Patches to compile and run on win32 again (maybe)?
34126 - Fix crash when looking for ~/.torrc with no $HOME set.
34127 - Fix a race bug in the unit tests.
34128 - Handle verified/unverified name collisions better when new
34129 routerinfo's arrive in a directory.
34130 - Sometimes routers were getting entered into the stats before
34131 we'd assigned their identity_digest. Oops.
34132 - Only pick and establish intro points after we've gotten a
34135 - AllowUnverifiedNodes config option to let circuits choose no-name
34136 routers in entry,middle,exit,introduction,rendezvous positions.
34137 Allow middle and rendezvous positions by default.
34138 - Add a man page for tor-resolve.
34141 Changes in version 0.0.7.3 - 2004-08-12
34142 o Stop dnsworkers from triggering an assert failure when you
34143 ask them to resolve the host "".
34146 Changes in version 0.0.8pre3 - 2004-08-09
34147 o Changes from 0.0.7.2:
34148 - Allow multiple ORs with same nickname in routerlist -- now when
34149 people give us one identity key for a nickname, then later
34150 another, we don't constantly complain until the first expires.
34151 - Remember used bandwidth (both in and out), and publish 15-minute
34152 snapshots for the past day into our descriptor.
34153 - You can now fetch $DIRURL/running-routers to get just the
34154 running-routers line, not the whole descriptor list. (But
34155 clients don't use this yet.)
34156 - When people mistakenly use Tor as an http proxy, point them
34157 at the tor-doc.html rather than the INSTALL.
34158 - Remove our mostly unused -- and broken -- hex_encode()
34159 function. Use base16_encode() instead. (Thanks to Timo Lindfors
34160 for pointing out this bug.)
34161 - Rotate onion keys every 12 hours, not every 2 hours, so we have
34162 fewer problems with people using the wrong key.
34163 - Change the default exit policy to reject the default edonkey,
34164 kazaa, gnutella ports.
34165 - Add replace_file() to util.[ch] to handle win32's rename().
34167 o Changes from 0.0.8preX:
34168 - Fix two bugs in saving onion keys to disk when rotating, so
34169 hopefully we'll get fewer people using old onion keys.
34170 - Fix an assert error that was making SocksPolicy not work.
34171 - Be willing to expire routers that have an open dirport -- it's
34172 just the authoritative dirservers we want to not forget.
34173 - Reject tor-resolve requests for .onion addresses early, so we
34174 don't build a whole rendezvous circuit and then fail.
34175 - When you're warning a server that he's unverified, don't cry
34176 wolf unpredictably.
34177 - Fix a race condition: don't try to extend onto a connection
34178 that's still handshaking.
34179 - For servers in clique mode, require the conn to be open before
34180 you'll choose it for your path.
34181 - Fix some cosmetic bugs about duplicate mark-for-close, lack of
34182 end relay cell, etc.
34183 - Measure bandwidth capacity over the last 24 hours, not just 12
34184 - Bugfix: authoritative dirservers were making and signing a new
34185 directory for each client, rather than reusing the cached one.
34188 Changes in version 0.0.8pre2 - 2004-08-04
34189 o Changes from 0.0.7.2:
34191 - Check directory signature _before_ you decide whether you're
34192 you're running an obsolete version and should exit.
34193 - Check directory signature _before_ you parse the running-routers
34194 list to decide who's running or verified.
34195 - Bugfixes and features:
34196 - Check return value of fclose while writing to disk, so we don't
34197 end up with broken files when servers run out of disk space.
34198 - Log a warning if the user uses an unsafe socks variant, so people
34199 are more likely to learn about privoxy or socat.
34200 - Dirservers now include RFC1123-style dates in the HTTP headers,
34201 which one day we will use to better detect clock skew.
34203 o Changes from 0.0.8pre1:
34204 - Make it compile without warnings again on win32.
34205 - Log a warning if you're running an unverified server, to let you
34206 know you might want to get it verified.
34207 - Only pick a default nickname if you plan to be a server.
34210 Changes in version 0.0.8pre1 - 2004-07-23
34212 - Made our unit tests compile again on OpenBSD 3.5, and tor
34213 itself compile again on OpenBSD on a sparc64.
34214 - We were neglecting milliseconds when logging on win32, so
34215 everything appeared to happen at the beginning of each second.
34217 o Protocol changes:
34218 - 'Extend' relay cell payloads now include the digest of the
34219 intended next hop's identity key. Now we can verify that we're
34220 extending to the right router, and also extend to routers we
34221 hadn't heard of before.
34224 - Tor nodes can now act as relays (with an advertised ORPort)
34225 without being manually verified by the dirserver operators.
34226 - Uploaded descriptors of unverified routers are now accepted
34227 by the dirservers, and included in the directory.
34228 - Verified routers are listed by nickname in the running-routers
34229 list; unverified routers are listed as "$<fingerprint>".
34230 - We now use hash-of-identity-key in most places rather than
34231 nickname or addr:port, for improved security/flexibility.
34232 - To avoid Sybil attacks, paths still use only verified servers.
34233 But now we have a chance to play around with hybrid approaches.
34234 - Nodes track bandwidth usage to estimate capacity (not used yet).
34235 - ClientOnly option for nodes that never want to become servers.
34236 - Directory caching.
34237 - "AuthoritativeDir 1" option for the official dirservers.
34238 - Now other nodes (clients and servers) will cache the latest
34239 directory they've pulled down.
34240 - They can enable their DirPort to serve it to others.
34241 - Clients will pull down a directory from any node with an open
34242 DirPort, and check the signature/timestamp correctly.
34243 - Authoritative dirservers now fetch directories from other
34244 authdirservers, to stay better synced.
34245 - Running-routers list tells who's down also, along with noting
34246 if they're verified (listed by nickname) or unverified (listed
34248 - Allow dirservers to serve running-router list separately.
34249 This isn't used yet.
34250 - ORs connect-on-demand to other ORs
34251 - If you get an extend cell to an OR you're not connected to,
34252 connect, handshake, and forward the create cell.
34253 - The authoritative dirservers stay connected to everybody,
34254 and everybody stays connected to 0.0.7 servers, but otherwise
34255 clients/servers expire unused connections after 5 minutes.
34256 - When servers get a sigint, they delay 30 seconds (refusing new
34257 connections) then exit. A second sigint causes immediate exit.
34258 - File and name management:
34259 - Look for .torrc if no CONFDIR "torrc" is found.
34260 - If no datadir is defined, then choose, make, and secure ~/.tor
34262 - If torrc not found, exitpolicy reject *:*.
34263 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
34264 - If no nickname is defined, derive default from hostname.
34265 - Rename secret key files, e.g. identity.key -> secret_id_key,
34266 to discourage people from mailing their identity key to tor-ops.
34267 - Refuse to build a circuit before the directory has arrived --
34268 it won't work anyway, since you won't know the right onion keys
34270 - Try other dirservers immediately if the one you try is down. This
34271 should tolerate down dirservers better now.
34272 - Parse tor version numbers so we can do an is-newer-than check
34273 rather than an is-in-the-list check.
34274 - New socks command 'resolve', to let us shim gethostbyname()
34276 - A 'tor_resolve' script to access the socks resolve functionality.
34277 - A new socks-extensions.txt doc file to describe our
34278 interpretation and extensions to the socks protocols.
34279 - Add a ContactInfo option, which gets published in descriptor.
34280 - Publish OR uptime in descriptor (and thus in directory) too.
34281 - Write tor version at the top of each log file
34282 - New docs in the tarball:
34284 - Document that you should proxy your SSL traffic too.
34287 Changes in version 0.0.7.2 - 2004-07-07
34288 o A better fix for the 0.0.0.0 problem, that will hopefully
34289 eliminate the remaining related assertion failures.
34292 Changes in version 0.0.7.1 - 2004-07-04
34293 o When an address resolves to 0.0.0.0, treat it as a failed resolve,
34294 since internally we use 0.0.0.0 to signify "not yet resolved".
34297 Changes in version 0.0.7 - 2004-06-07
34298 o Updated the man page to reflect the new features.
34301 Changes in version 0.0.7rc2 - 2004-06-06
34302 o Changes from 0.0.7rc1:
34303 - Make it build on Win32 again.
34304 o Changes from 0.0.6.2:
34305 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
34309 Changes in version 0.0.7rc1 - 2004-06-02
34311 - On sighup, we were adding another log without removing the first
34312 one. So log messages would get duplicated n times for n sighups.
34313 - Several cases of using a connection after we'd freed it. The
34314 problem was that connections that are pending resolve are in both
34315 the pending_resolve tree, and also the circuit's resolving_streams
34316 list. When you want to remove one, you must remove it from both.
34317 - Fix a double-mark-for-close where an end cell arrived for a
34318 resolving stream, and then the resolve failed.
34319 - Check directory signatures based on name of signer, not on whom
34320 we got the directory from. This will let us cache directories more
34323 - Crank up some of our constants to handle more users.
34326 Changes in version 0.0.7pre1 - 2004-06-02
34327 o Fixes for crashes and other obnoxious bugs:
34328 - Fix an epipe bug: sometimes when directory connections failed
34329 to connect, we would give them a chance to flush before closing
34331 - When we detached from a circuit because of resolvefailed, we
34332 would immediately try the same circuit twice more, and then
34333 give up on the resolve thinking we'd tried three different
34335 - Limit the number of intro circuits we'll attempt to build for a
34336 hidden service per 15-minute period.
34337 - Check recommended-software string *early*, before actually parsing
34338 the directory. Thus we can detect an obsolete version and exit,
34339 even if the new directory format doesn't parse.
34340 o Fixes for security bugs:
34341 - Remember which nodes are dirservers when you startup, and if a
34342 random OR enables his dirport, don't automatically assume he's
34343 a trusted dirserver.
34345 - Directory connections were asking the wrong poll socket to
34346 start writing, and not asking themselves to start writing.
34347 - When we detached from a circuit because we sent a begin but
34348 didn't get a connected, we would use it again the first time;
34349 but after that we would correctly switch to a different one.
34350 - Stop warning when the first onion decrypt attempt fails; they
34351 will sometimes legitimately fail now that we rotate keys.
34352 - Override unaligned-access-ok check when $host_cpu is ia64 or
34353 arm. Apparently they allow it but the kernel whines.
34354 - Dirservers try to reconnect periodically too, in case connections
34356 - Fix some memory leaks in directory servers.
34357 - Allow backslash in Win32 filenames.
34358 - Made Tor build complain-free on FreeBSD, hopefully without
34359 breaking other BSD builds. We'll see.
34361 - Doxygen markup on all functions and global variables.
34362 - Make directory functions update routerlist, not replace it. So
34363 now directory disagreements are not so critical a problem.
34364 - Remove the upper limit on number of descriptors in a dirserver's
34365 directory (not that we were anywhere close).
34366 - Allow multiple logfiles at different severity ranges.
34367 - Allow *BindAddress to specify ":port" rather than setting *Port
34368 separately. Allow multiple instances of each BindAddress config
34369 option, so you can bind to multiple interfaces if you want.
34370 - Allow multiple exit policy lines, which are processed in order.
34371 Now we don't need that huge line with all the commas in it.
34372 - Enable accept/reject policies on SOCKS connections, so you can bind
34373 to 0.0.0.0 but still control who can use your OP.
34376 Changes in version 0.0.6.2 - 2004-05-16
34377 o Our integrity-checking digest was checking only the most recent cell,
34378 not the previous cells like we'd thought.
34379 Thanks to Stefan Mark for finding the flaw!
34382 Changes in version 0.0.6.1 - 2004-05-06
34383 o Fix two bugs in our AES counter-mode implementation (this affected
34384 onion-level stream encryption, but not TLS-level). It turns
34385 out we were doing something much more akin to a 16-character
34386 polyalphabetic cipher. Oops.
34387 Thanks to Stefan Mark for finding the flaw!
34388 o Retire moria3 as a directory server, and add tor26 as a directory
34392 Changes in version 0.0.6 - 2004-05-02
34393 [version bump only]
34396 Changes in version 0.0.6rc4 - 2004-05-01
34397 o Update the built-in dirservers list to use the new directory format
34398 o Fix a rare seg fault: if a node offering a hidden service attempts
34399 to build a circuit to Alice's rendezvous point and fails before it
34400 reaches the last hop, it retries with a different circuit, but
34402 o Handle windows socket errors correctly.
34405 Changes in version 0.0.6rc3 - 2004-04-28
34406 o Don't expire non-general excess circuits (if we had enough
34407 circuits open, we were expiring rendezvous circuits -- even
34408 when they had a stream attached. oops.)
34409 o Fetch randomness from /dev/urandom better (not via fopen/fread)
34410 o Better debugging for tls errors
34411 o Some versions of openssl have an SSL_pending function that erroneously
34412 returns bytes when there is a non-application record pending.
34413 o Set Content-Type on the directory and hidserv descriptor.
34414 o Remove IVs from cipher code, since AES-ctr has none.
34415 o Win32 fixes. Tor now compiles on win32 with no warnings/errors.
34416 o We were using an array of length zero in a few places.
34417 o win32's gethostbyname can't resolve an IP to an IP.
34418 o win32's close can't close a socket.
34421 Changes in version 0.0.6rc2 - 2004-04-26
34422 o Fix a bug where we were closing tls connections intermittently.
34423 It turns out openssl keeps its errors around -- so if an error
34424 happens, and you don't ask about it, and then another openssl
34425 operation happens and succeeds, and you ask if there was an error,
34426 it tells you about the first error. Fun fun.
34427 o Fix a bug that's been lurking since 27 may 03 (!)
34428 When passing back a destroy cell, we would use the wrong circ id.
34429 'Mostly harmless', but still worth fixing.
34430 o Since we don't support truncateds much, don't bother sending them;
34431 just close the circ.
34432 o check for <machine/limits.h> so we build on NetBSD again (I hope).
34433 o don't crash if a conn that sent a begin has suddenly lost its circuit
34434 (this was quite rare).
34437 Changes in version 0.0.6rc1 - 2004-04-25
34438 o We now rotate link (tls context) keys and onion keys.
34439 o CREATE cells now include oaep padding, so you can tell
34440 if you decrypted them correctly.
34441 o Add bandwidthburst to server descriptor.
34442 o Directories now say which dirserver signed them.
34443 o Use a tor_assert macro that logs failed assertions too.
34446 Changes in version 0.0.6pre5 - 2004-04-18
34447 o changes from 0.0.6pre4:
34448 - make tor build on broken freebsd 5.2 installs
34449 - fix a failed assert when you try an intro point, get a nack, and try
34450 a second one and it works.
34451 - when alice uses a port that the hidden service doesn't accept,
34452 it now sends back an end cell (denied by exit policy). otherwise
34453 alice would just have to wait to time out.
34454 - fix another rare bug: when we had tried all the intro
34455 points for a hidden service, we fetched the descriptor
34456 again, but we left our introcirc thinking it had already
34457 sent an intro, so it kept waiting for a response...
34458 - bugfix: when you sleep your hidden-service laptop, as soon
34459 as it wakes up it tries to upload a service descriptor, but
34460 socketpair fails for some reason (localhost not up yet?).
34461 now we simply give up on that upload, and we'll try again later.
34462 i'd still like to find the bug though.
34463 - if an intro circ waiting for an ack dies before getting one, then
34465 - we were reusing stale service descriptors and refetching usable
34469 Changes in version 0.0.6pre4 - 2004-04-14
34470 o changes from 0.0.6pre3:
34471 - when bob fails to connect to the rendezvous point, and his
34472 circ didn't fail because of the rendezvous point itself, then
34473 he retries a couple of times
34474 - we expire introduction and rendezvous circs more thoroughly
34475 (sometimes they were hanging around forever)
34476 - we expire unattached rendezvous streams that have been around
34477 too long (they were sticking around forever).
34478 - fix a measly fencepost error that was crashing everybody with
34482 Changes in version 0.0.6pre3 - 2004-04-14
34483 o changes from 0.0.6pre2:
34484 - make hup work again
34485 - fix some memory leaks for dirservers
34486 - allow more skew in rendezvous descriptor timestamps, to help
34487 handle people like blanu who don't know what time it is
34488 - normal circs are 3 hops, but some rend/intro circs are 4, if
34489 the initiator doesn't get to choose the last hop
34490 - send acks for introductions, so alice can know whether to try
34492 - bob publishes intro points more correctly
34493 o changes from 0.0.5:
34494 - fix an assert trigger that's been plaguing us since the days
34495 of 0.0.2prexx (thanks weasel!)
34496 - retry stream correctly when we fail to connect because of
34497 exit-policy-reject (should try another) or can't-resolve-address
34498 (also should try another, because dns on random internet servers
34500 - when we hup a dirserver and we've *removed* a server from the
34501 approved-routers list, now we remove that server from the
34502 in-memory directories too
34505 Changes in version 0.0.6pre2 - 2004-04-08
34506 o We fixed our base32 implementation. Now it works on all architectures.
34509 Changes in version 0.0.6pre1 - 2004-04-08
34511 - Hidden services and rendezvous points are implemented. Go to
34512 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
34513 hidden services. (This only works via a socks4a proxy such as
34514 Privoxy, and currently it's quite slow.)
34517 Changes in version 0.0.5 - 2004-03-30
34518 [version bump only]
34521 Changes in version 0.0.5rc3 - 2004-03-29
34522 o Install torrc as torrc.sample -- we no longer clobber your
34524 o Re-enable recommendedversion checking (we broke it in rc2, oops)
34525 o Add in a 'notice' log level for things the operator should hear
34526 but that aren't warnings
34529 Changes in version 0.0.5rc2 - 2004-03-29
34530 o Hold socks connection open until reply is flushed (if possible)
34531 o Make exit nodes resolve IPs to IPs immediately, rather than asking
34532 the dns farm to do it.
34533 o Fix c99 aliasing warnings in rephist.c
34534 o Don't include server descriptors that are older than 24 hours in the
34536 o Give socks 'reject' replies their whole 15s to attempt to flush,
34537 rather than seeing the 60s timeout and assuming the flush had failed.
34538 o Clean automake droppings from the cvs repository
34541 Changes in version 0.0.5rc1 - 2004-03-28
34542 o Fix mangled-state bug in directory fetching (was causing sigpipes).
34543 o Only build circuits after we've fetched the directory: clients were
34544 using only the directory servers before they'd fetched a directory.
34545 This also means longer startup time; so it goes.
34546 o Fix an assert trigger where an OP would fail to handshake, and we'd
34547 expect it to have a nickname.
34548 o Work around a tsocks bug: do a socks reject when AP connection dies
34549 early, else tsocks goes into an infinite loop.
34552 Changes in version 0.0.4 - 2004-03-26
34553 o When connecting to a dirserver or OR and the network is down,
34557 Changes in version 0.0.3 - 2004-03-26
34558 o Warn and fail if server chose a nickname with illegal characters
34559 o Port to Solaris and Sparc:
34560 - include missing header fcntl.h
34561 - have autoconf find -lsocket -lnsl automatically
34562 - deal with hardware word alignment
34563 - make uname() work (solaris has a different return convention)
34564 - switch from using signal() to sigaction()
34565 o Preliminary work on reputation system:
34566 - Keep statistics on success/fail of connect attempts; they're published
34567 by kill -USR1 currently.
34568 - Add a RunTesting option to try to learn link state by creating test
34569 circuits, even when SocksPort is off.
34570 - Remove unused open circuits when there are too many.
34573 Changes in version 0.0.2 - 2004-03-19
34574 - Include strlcpy and strlcat for safer string ops
34575 - define INADDR_NONE so we compile (but still not run) on solaris
34578 Changes in version 0.0.2pre27 - 2004-03-14
34580 - Allow internal tor networks (we were rejecting internal IPs,
34581 now we allow them if they're set explicitly).
34582 - And fix a few endian issues.
34585 Changes in version 0.0.2pre26 - 2004-03-14
34587 - If a stream times out after 15s without a connected cell, don't
34588 try that circuit again: try a new one.
34589 - Retry streams at most 4 times. Then give up.
34590 - When a dirserver gets a descriptor from an unknown router, it
34591 logs its fingerprint (so the dirserver operator can choose to
34592 accept it even without mail from the server operator).
34593 - Inform unapproved servers when we reject their descriptors.
34594 - Make tor build on Windows again. It works as a client, who knows
34596 - Clearer instructions in the torrc for how to set up a server.
34597 - Be more efficient about reading fd's when our global token bucket
34598 (used for rate limiting) becomes empty.
34600 - Stop asserting that computers always go forward in time. It's
34602 - When we sent a cell (e.g. destroy) and then marked an OR connection
34603 expired, we might close it before finishing a flush if the other
34604 side isn't reading right then.
34605 - Don't allow dirservers to start if they haven't defined
34606 RecommendedVersions
34607 - We were caching transient dns failures. Oops.
34608 - Prevent servers from publishing an internal IP as their address.
34609 - Address a strcat vulnerability in circuit.c
34612 Changes in version 0.0.2pre25 - 2004-03-04
34614 - Put the OR's IP in its router descriptor, not its fqdn. That way
34615 we'll stop being stalled by gethostbyname for nodes with flaky dns,
34618 - If the user typed in an address that didn't resolve, the server
34622 Changes in version 0.0.2pre24 - 2004-03-03
34624 - Fix an assertion failure in dns.c, where we were trying to dequeue
34625 a pending dns resolve even if it wasn't pending
34626 - Fix a spurious socks5 warning about still trying to write after the
34627 connection is finished.
34628 - Hold certain marked_for_close connections open until they're finished
34629 flushing, rather than losing bytes by closing them too early.
34630 - Correctly report the reason for ending a stream
34631 - Remove some duplicate calls to connection_mark_for_close
34632 - Put switch_id and start_daemon earlier in the boot sequence, so it
34633 will actually try to chdir() to options.DataDirectory
34634 - Make 'make test' exit(1) if a test fails; fix some unit tests
34635 - Make tor fail when you use a config option it doesn't know about,
34636 rather than warn and continue.
34637 - Make --version work
34638 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
34641 Changes in version 0.0.2pre23 - 2004-02-29
34643 - Print a statement when the first circ is finished, so the user
34644 knows it's working.
34645 - If a relay cell is unrecognized at the end of the circuit,
34646 send back a destroy. (So attacks to mutate cells are more
34648 - New config option 'excludenodes' to avoid certain nodes for circuits.
34649 - When it daemonizes, it chdir's to the DataDirectory rather than "/",
34650 so you can collect coredumps there.
34652 - Fix a bug in tls flushing where sometimes data got wedged and
34653 didn't flush until more data got sent. Hopefully this bug was
34654 a big factor in the random delays we were seeing.
34655 - Make 'connected' cells include the resolved IP, so the client
34656 dns cache actually gets populated.
34657 - Disallow changing from ORPort=0 to ORPort>0 on hup.
34658 - When we time-out on a stream and detach from the circuit, send an
34659 end cell down it first.
34660 - Only warn about an unknown router (in exitnodes, entrynodes,
34661 excludenodes) after we've fetched a directory.
34664 Changes in version 0.0.2pre22 - 2004-02-26
34666 - Servers publish less revealing uname information in descriptors.
34667 - More memory tracking and assertions, to crash more usefully when
34669 - If the default torrc isn't there, just use some default defaults.
34670 Plus provide an internal dirservers file if they don't have one.
34671 - When the user tries to use Tor as an http proxy, give them an http
34672 501 failure explaining that we're a socks proxy.
34673 - Dump a new router.desc on hup, to help confused people who change
34674 their exit policies and then wonder why router.desc doesn't reflect
34676 - Clean up the generic tor.sh init script that we ship with.
34678 - If the exit stream is pending on the resolve, and a destroy arrives,
34679 then the stream wasn't getting removed from the pending list. I
34680 think this was the one causing recent server crashes.
34681 - Use a more robust poll on OSX 10.3, since their poll is flaky.
34682 - When it couldn't resolve any dirservers, it was useless from then on.
34683 Now it reloads the RouterFile (or default dirservers) if it has no
34685 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
34686 many users don't even *have* a /usr/local/sbin/.
34689 Changes in version 0.0.2pre21 - 2004-02-18
34691 - There's a ChangeLog file that actually reflects the changelog.
34692 - There's a 'torify' wrapper script, with an accompanying
34693 tor-tsocks.conf, that simplifies the process of using tsocks for
34694 tor. It even has a man page.
34695 - The tor binary gets installed to sbin rather than bin now.
34696 - Retry streams where the connected cell hasn't arrived in 15 seconds
34697 - Clean up exit policy handling -- get the default out of the torrc,
34698 so we can update it without forcing each server operator to fix
34700 - Allow imaps and pop3s in default exit policy
34702 - Prevent picking middleman nodes as the last node in the circuit
34705 Changes in version 0.0.2pre20 - 2004-01-30
34707 - We now have a deb package, and it's in debian unstable. Go to
34708 it, apt-getters. :)
34709 - I've split the TotalBandwidth option into BandwidthRate (how many
34710 bytes per second you want to allow, long-term) and
34711 BandwidthBurst (how many bytes you will allow at once before the cap
34712 kicks in). This better token bucket approach lets you, say, set
34713 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
34714 performance while not exceeding your monthly bandwidth quota.
34715 - Push out a tls record's worth of data once you've got it, rather
34716 than waiting until you've read everything waiting to be read. This
34717 may improve performance by pipelining better. We'll see.
34718 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
34719 from failed circuits (if they haven't been connected yet) and attach
34721 - Expire old streams that haven't managed to connect. Some day we'll
34722 have them reattach to new circuits instead.
34725 - Fix several memory leaks that were causing servers to become bloated
34727 - Fix a few very rare assert triggers. A few more remain.
34728 - Setuid to User _before_ complaining about running as root.
34731 Changes in version 0.0.2pre19 - 2004-01-07
34733 - Fix deadlock condition in dns farm. We were telling a child to die by
34734 closing the parent's file descriptor to him. But newer children were
34735 inheriting the open file descriptor from the parent, and since they
34736 weren't closing it, the socket never closed, so the child never read
34737 eof, so he never knew to exit. Similarly, dns workers were holding
34738 open other sockets, leading to all sorts of chaos.
34739 - New cleaner daemon() code for forking and backgrounding.
34740 - If you log to a file, it now prints an entry at the top of the
34741 logfile so you know it's working.
34742 - The onionskin challenge length was 30 bytes longer than necessary.
34743 - Started to patch up the spec so it's not quite so out of date.
34746 Changes in version 0.0.2pre18 - 2004-01-02
34748 - Fix endian issues with the 'integrity' field in the relay header.
34749 - Fix a potential bug where connections in state
34750 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
34753 Changes in version 0.0.2pre17 - 2003-12-30
34755 - Made --debuglogfile (or any second log file, actually) work.
34756 - Resolved an edge case in get_unique_circ_id_by_conn where a smart
34757 adversary could force us into an infinite loop.
34760 - Each onionskin handshake now includes a hash of the computed key,
34761 to prove the server's identity and help perfect forward secrecy.
34762 - Changed cell size from 256 to 512 bytes (working toward compatibility
34764 - Changed cell length to 2 bytes, and moved it to the relay header.
34765 - Implemented end-to-end integrity checking for the payloads of
34767 - Separated streamid from 'recognized' (otherwise circuits will get
34768 messed up when we try to have streams exit from the middle). We
34769 use the integrity-checking to confirm that a cell is addressed to
34771 - Randomize the initial circid and streamid values, so an adversary who
34772 breaks into a node can't learn how many circuits or streams have
34776 Changes in version 0.0.2pre16 - 2003-12-14
34778 - Fixed a bug that made HUP trigger an assert
34779 - Fixed a bug where a circuit that immediately failed wasn't being
34780 counted as a failed circuit in counting retries.
34783 - Now we close the circuit when we get a truncated cell: otherwise we're
34784 open to an anonymity attack where a bad node in the path truncates
34785 the circuit and then we open streams at him.
34786 - Add port ranges to exit policies
34787 - Add a conservative default exit policy
34788 - Warn if you're running tor as root
34789 - on HUP, retry OR connections and close/rebind listeners
34790 - options.EntryNodes: try these nodes first when picking the first node
34791 - options.ExitNodes: if your best choices happen to include any of
34792 your preferred exit nodes, you choose among just those preferred
34794 - options.ExcludedNodes: nodes that are never picked in path building
34797 Changes in version 0.0.2pre15 - 2003-12-03
34798 o Robustness and bugfixes:
34799 - Sometimes clients would cache incorrect DNS resolves, which would
34800 really screw things up.
34801 - An OP that goes offline would slowly leak all its sockets and stop
34803 - A wide variety of bugfixes in exit node selection, exit policy
34804 handling, and processing pending streams when a new circuit is
34806 - Pick nodes for a path only from those the directory says are up
34807 - Choose randomly from all running dirservers, not always the first one
34808 - Increase allowed http header size for directory fetch.
34809 - Stop writing to stderr (if we're daemonized it will be closed).
34810 - Enable -g always, so cores will be more useful to me.
34811 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
34814 - Wrote a man page. It lists commonly used options.
34817 - Change default loglevel to warn.
34818 - Make PidFile default to null rather than littering in your CWD.
34819 - OnionRouter config option is now obsolete. Instead it just checks
34821 - Moved to a single unified torrc file for both clients and servers.
34824 Changes in version 0.0.2pre14 - 2003-11-29
34825 o Robustness and bugfixes:
34826 - Force the admin to make the DataDirectory himself
34827 - to get ownership/permissions right
34828 - so clients no longer make a DataDirectory and then never use it
34829 - fix bug where a client who was offline for 45 minutes would never
34830 pull down a directory again
34831 - fix (or at least hide really well) the dns assert bug that was
34832 causing server crashes
34833 - warnings and improved robustness wrt clockskew for certs
34834 - use the native daemon(3) to daemonize, when available
34835 - exit if bind() fails
34836 - exit if neither socksport nor orport is defined
34837 - include our own tor_timegm (Win32 doesn't have its own)
34838 - bugfix for win32 with lots of connections
34839 - fix minor bias in PRNG
34840 - make dirserver more robust to corrupt cached directory
34843 - Wrote the design document (woo)
34845 o Circuit building and exit policies:
34846 - Circuits no longer try to use nodes that the directory has told them
34848 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
34849 bitcounts (18.0.0.0/8).
34850 - Make AP connections standby for a circuit if no suitable circuit
34851 exists, rather than failing
34852 - Circuits choose exit node based on addr/port, exit policies, and
34853 which AP connections are standing by
34854 - Bump min pathlen from 2 to 3
34855 - Relay end cells have a payload to describe why the stream ended.
34856 - If the stream failed because of exit policy, try again with a new
34858 - Clients have a dns cache to remember resolved addresses.
34859 - Notice more quickly when we have no working circuits
34862 - APPort is now called SocksPort
34863 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
34865 - RecommendedVersions is now a config variable rather than
34866 hardcoded (for dirservers)
34867 - Reloads config on HUP
34868 - Usage info on -h or --help
34869 - If you set User and Group config vars, it'll setu/gid to them.
34872 Changes in version 0.0.2pre13 - 2003-10-19
34873 o General stability:
34874 - SSL_write no longer fails when it returns WANTWRITE and the number
34875 of bytes in the buf has changed by the next SSL_write call.
34876 - Fix segfault fetching directory when network is down
34877 - Fix a variety of minor memory leaks
34878 - Dirservers reload the fingerprints file on HUP, so I don't have
34879 to take down the network when I approve a new router
34880 - Default server config file has explicit Address line to specify fqdn
34883 - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
34884 - Make listener connections not ever alloc bufs
34886 o Autoconf improvements:
34887 - don't clobber an external CFLAGS in ./configure
34888 - Make install now works
34889 - create var/lib/tor on make install
34890 - autocreate a tor.sh initscript to help distribs
34891 - autocreate the torrc and sample-server-torrc with correct paths
34893 o Log files and Daemonizing now work:
34894 - If --DebugLogFile is specified, log to it at -l debug
34895 - If --LogFile is specified, use it instead of commandline
34896 - If --RunAsDaemon is set, tor forks and backgrounds on startup