1 Changes in version 0.4.5.10 - 2021-08-16
2 This version fixes several bugs from earlier versions of Tor,
3 including one that could lead to a denial-of-service attack. Everyone
4 running an earlier version, whether as a client, a relay, or an onion
5 service, should upgrade to Tor 0.3.5.16, 0.4.5.10, or 0.4.6.7.
7 o Major bugfixes (cryptography, security):
8 - Resolve an assertion failure caused by a behavior mismatch between
9 our batch-signature verification code and our single-signature
10 verification code. This assertion failure could be triggered
11 remotely, leading to a denial of service attack. We fix this issue
12 by disabling batch verification. Fixes bug 40078; bugfix on
13 0.2.6.1-alpha. This issue is also tracked as TROVE-2021-007 and
14 CVE-2021-38385. Found by Henry de Valence.
16 o Minor feature (fallbackdir):
17 - Regenerate fallback directories list. Close ticket 40447.
19 o Minor features (geoip data):
20 - Update the geoip files to match the IPFire Location Database, as
21 retrieved on 2021/08/12.
23 o Minor features (testing):
24 - Enable the deterministic RNG for unit tests that covers the
25 address set bloomfilter-based API's. Fixes bug 40419; bugfix
28 o Minor bugfix (crypto, backport from 0.4.6.7):
29 - Disable the unused batch verification feature of ed25519-donna.
30 Fixes bug 40078; bugfix on 0.2.6.1-alpha. Found by Henry
33 o Minor bugfixes (relay, backport from 0.4.6.7):
34 - Reduce the compression level for data streaming from HIGH to LOW.
35 Fixes bug 40301; bugfix on 0.3.5.1-alpha.
37 o Minor bugfixes (timekeeping, backport from 0.4.6.7):
38 - Calculate the time of day correctly on systems where the time_t
39 type includes leap seconds. (This is not the case on most
40 operating systems, but on those where it occurs, our tor_timegm
41 function did not correctly invert the system's gmtime function,
42 which could result in assertion failures when calculating voting
43 schedules.) Fixes bug 40383; bugfix on 0.2.0.3-alpha.
45 o Minor bugfixes (warnings, portability, backport from 0.4.6.6):
46 - Suppress a strict-prototype warning when building with some
47 versions of NSS. Fixes bug 40409; bugfix on 0.3.5.1-alpha.
50 Changes in version 0.4.5.9 - 2021-06-14
51 Tor 0.4.5.9 fixes several security issues, including a
52 denial-of-service attack against onion service clients, and another
53 denial-of-service attack against relays. Everybody should upgrade to
54 one of 0.3.5.15, 0.4.4.9, 0.4.5.9, or 0.4.6.5.
56 o Major bugfixes (security, backport from 0.4.6.5):
57 - Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on
58 half-closed streams. Previously, clients failed to validate which
59 hop sent these cells: this would allow a relay on a circuit to end
60 a stream that wasn't actually built with it. Fixes bug 40389;
61 bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2021-
62 003 and CVE-2021-34548.
64 o Major bugfixes (security, defense-in-depth, backport from 0.4.6.5):
65 - Detect more failure conditions from the OpenSSL RNG code.
66 Previously, we would detect errors from a missing RNG
67 implementation, but not failures from the RNG code itself.
68 Fortunately, it appears those failures do not happen in practice
69 when Tor is using OpenSSL's default RNG implementation. Fixes bug
70 40390; bugfix on 0.2.8.1-alpha. This issue is also tracked as
71 TROVE-2021-004. Reported by Jann Horn at Google's Project Zero.
73 o Major bugfixes (security, denial of service, backport from 0.4.6.5):
74 - Resist a hashtable-based CPU denial-of-service attack against
75 relays. Previously we used a naive unkeyed hash function to look
76 up circuits in a circuitmux object. An attacker could exploit this
77 to construct circuits with chosen circuit IDs, to create
78 collisions and make the hash table inefficient. Now we use a
79 SipHash construction here instead. Fixes bug 40391; bugfix on
80 0.2.4.4-alpha. This issue is also tracked as TROVE-2021-005 and
81 CVE-2021-34549. Reported by Jann Horn from Google's Project Zero.
82 - Fix an out-of-bounds memory access in v3 onion service descriptor
83 parsing. An attacker could exploit this bug by crafting an onion
84 service descriptor that would crash any client that tried to visit
85 it. Fixes bug 40392; bugfix on 0.3.0.1-alpha. This issue is also
86 tracked as TROVE-2021-006 and CVE-2021-34550. Reported by Sergei
87 Glazunov from Google's Project Zero.
89 o Minor features (compatibility, backport from 0.4.6.4-rc):
90 - Remove an assertion function related to TLS renegotiation. It was
91 used nowhere outside the unit tests, and it was breaking
92 compilation with recent alpha releases of OpenSSL 3.0.0. Closes
95 o Minor features (geoip data):
96 - Update the geoip files to match the IPFire Location Database, as
97 retrieved on 2021/06/10.
99 o Minor bugfixes (control, sandbox, backport from 0.4.6.4-rc):
100 - Allow the control command SAVECONF to succeed when the seccomp
101 sandbox is enabled, and make SAVECONF keep only one backup file to
102 simplify implementation. Previously SAVECONF allowed a large
103 number of backup files, which made it incompatible with the
104 sandbox. Fixes bug 40317; bugfix on 0.2.5.4-alpha. Patch by
107 o Minor bugfixes (metrics port, backport from 0.4.6.4-rc):
108 - Fix a bug that made tor try to re-bind() on an already open
109 MetricsPort every 60 seconds. Fixes bug 40370; bugfix
113 Changes in version 0.4.5.8 - 2021-05-10
114 Tor 0.4.5.8 fixes several bugs in earlier version, backporting fixes
115 from the 0.4.6.x series.
117 o Minor features (compatibility, Linux seccomp sandbox, backport from 0.4.6.3-rc):
118 - Add a workaround to enable the Linux sandbox to work correctly
119 with Glibc 2.33. This version of Glibc has started using the
120 fstatat() system call, which previously our sandbox did not allow.
121 Closes ticket 40382; see the ticket for a discussion of trade-offs.
123 o Minor features (compilation, backport from 0.4.6.3-rc):
124 - Make the autoconf script build correctly with autoconf versions
125 2.70 and later. Closes part of ticket 40335.
127 o Minor features (fallback directory list, backport from 0.4.6.2-alpha):
128 - Regenerate the list of fallback directories to contain a new set
129 of 200 relays. Closes ticket 40265.
131 o Minor features (geoip data):
132 - Update the geoip files to match the IPFire Location Database, as
133 retrieved on 2021/05/07.
135 o Minor features (onion services):
136 - Add warning message when connecting to now deprecated v2 onion
137 services. As announced, Tor 0.4.5.x is the last series that will
138 support v2 onions. Closes ticket 40373.
140 o Minor bugfixes (bridge, pluggable transport, backport from 0.4.6.2-alpha):
141 - Fix a regression that made it impossible start Tor using a bridge
142 line with a transport name and no fingerprint. Fixes bug 40360;
143 bugfix on 0.4.5.4-rc.
145 o Minor bugfixes (build, cross-compilation, backport from 0.4.6.3-rc):
146 - Allow a custom "ar" for cross-compilation. Our previous build
147 script had used the $AR environment variable in most places, but
148 it missed one. Fixes bug 40369; bugfix on 0.4.5.1-alpha.
150 o Minor bugfixes (channel, DoS, backport from 0.4.6.2-alpha):
151 - Fix a non-fatal BUG() message due to a too-early free of a string,
152 when listing a client connection from the DoS defenses subsystem.
153 Fixes bug 40345; bugfix on 0.4.3.4-rc.
155 o Minor bugfixes (compiler warnings, backport from 0.4.6.3-rc):
156 - Fix an indentation problem that led to a warning from GCC 11.1.1.
157 Fixes bug 40380; bugfix on 0.3.0.1-alpha.
159 o Minor bugfixes (controller, backport from 0.4.6.1-alpha):
160 - Fix a "BUG" warning that would appear when a controller chooses
161 the first hop for a circuit, and that circuit completes. Fixes bug
162 40285; bugfix on 0.3.2.1-alpha.
164 o Minor bugfixes (onion service, client, memory leak, backport from 0.4.6.3-rc):
165 - Fix a bug where an expired cached descriptor could get overwritten
166 with a new one without freeing it, leading to a memory leak. Fixes
167 bug 40356; bugfix on 0.3.5.1-alpha.
169 o Minor bugfixes (testing, BSD, backport from 0.4.6.2-alpha):
170 - Fix pattern-matching errors when patterns expand to invalid paths
171 on BSD systems. Fixes bug 40318; bugfix on 0.4.5.1-alpha. Patch by
175 Changes in version 0.4.5.7 - 2021-03-16
176 Tor 0.4.5.7 fixes two important denial-of-service bugs in earlier
179 One of these vulnerabilities (TROVE-2021-001) would allow an attacker
180 who can send directory data to a Tor instance to force that Tor
181 instance to consume huge amounts of CPU. This is easiest to exploit
182 against authorities, since anybody can upload to them, but directory
183 caches could also exploit this vulnerability against relays or clients
184 when they download. The other vulnerability (TROVE-2021-002) only
185 affects directory authorities, and would allow an attacker to remotely
186 crash the authority with an assertion failure. Patches have already
187 been provided to the authority operators, to help ensure
190 We recommend that everybody upgrade to one of the releases that fixes
191 these issues (0.3.5.14, 0.4.4.8, or 0.4.5.7) as they become available
194 This release also updates our GeoIP data source, and fixes a few
195 smaller bugs in earlier releases.
197 o Major bugfixes (security, denial of service):
198 - Disable the dump_desc() function that we used to dump unparseable
199 information to disk. It was called incorrectly in several places,
200 in a way that could lead to excessive CPU usage. Fixes bug 40286;
201 bugfix on 0.2.2.1-alpha. This bug is also tracked as TROVE-2021-
202 001 and CVE-2021-28089.
203 - Fix a bug in appending detached signatures to a pending consensus
204 document that could be used to crash a directory authority. Fixes
205 bug 40316; bugfix on 0.2.2.6-alpha. Tracked as TROVE-2021-002
208 o Minor features (geoip data):
209 - We have switched geoip data sources. Previously we shipped IP-to-
210 country mappings from Maxmind's GeoLite2, but in 2019 they changed
211 their licensing terms, so we were unable to update them after that
212 point. We now ship geoip files based on the IPFire Location
213 Database instead. (See https://location.ipfire.org/ for more
214 information). This release updates our geoip files to match the
215 IPFire Location Database as retrieved on 2021/03/12. Closes
218 o Minor bugfixes (directory authority):
219 - Now that exit relays don't allow exit connections to directory
220 authority DirPorts (to prevent network reentry), disable
221 authorities' reachability self test on the DirPort. Fixes bug
222 40287; bugfix on 0.4.5.5-rc.
224 o Minor bugfixes (documentation):
225 - Fix a formatting error in the documentation for
226 VirtualAddrNetworkIPv6. Fixes bug 40256; bugfix on 0.2.9.4-alpha.
228 o Minor bugfixes (Linux, relay):
229 - Fix a bug in determining total available system memory that would
230 have been triggered if the format of Linux's /proc/meminfo file
231 had ever changed to include "MemTotal:" in the middle of a line.
232 Fixes bug 40315; bugfix on 0.2.5.4-alpha.
234 o Minor bugfixes (metrics port):
235 - Fix a BUG() warning on the MetricsPort for an internal missing
236 handler. Fixes bug 40295; bugfix on 0.4.5.1-alpha.
238 o Minor bugfixes (onion service):
239 - Remove a harmless BUG() warning when reloading tor configured with
240 onion services. Fixes bug 40334; bugfix on 0.4.5.1-alpha.
242 o Minor bugfixes (portability):
243 - Fix a non-portable usage of "==" with "test" in the configure
244 script. Fixes bug 40298; bugfix on 0.4.5.1-alpha.
246 o Minor bugfixes (relay):
247 - Remove a spammy log notice falsely claiming that the IPv4/v6
248 address was missing. Fixes bug 40300; bugfix on 0.4.5.1-alpha.
249 - Do not query the address cache early in the boot process when
250 deciding if a relay needs to fetch early directory information
251 from an authority. This bug resulted in a relay falsely believing
252 it didn't have an address and thus triggering an authority fetch
253 at each boot. Related to our fix for 40300.
255 o Removed features (mallinfo deprecated):
256 - Remove mallinfo() usage entirely. Libc 2.33+ now deprecates it.
260 Changes in version 0.4.5.6 - 2021-02-15
261 The Tor 0.4.5.x release series is dedicated to the memory of Karsten
262 Loesing (1979-2020), Tor developer, cypherpunk, husband, and father.
263 Karsten is best known for creating the Tor metrics portal and leading
264 the metrics team, but he was involved in Tor from the early days. For
265 example, while he was still a student he invented and implemented the
266 v2 onion service directory design, and he also served as an ambassador
267 to the many German researchers working in the anonymity field. We
268 loved him and respected him for his patience, his consistency, and his
269 welcoming approach to growing our community.
271 This release series introduces significant improvements in relay IPv6
272 address discovery, a new "MetricsPort" mechanism for relay operators
273 to measure performance, LTTng support, build system improvements to
274 help when using Tor as a static library, and significant bugfixes
275 related to Windows relay performance. It also includes numerous
276 smaller features and bugfixes.
278 Below are the changes since 0.4.4.4-rc. For a complete list of changes
279 since 0.4.4.7, see the ReleaseNotes file.
281 o Major bugfixes (IPv6, relay):
282 - Fix a bug that prevented a relay from publishing its descriptor if
283 an auto-discovered IPv6 that was found unreachable. Fixes bug
284 40279; bugfix on 0.4.5.1-alpha.
286 o Minor features (protocol versions):
287 - Stop claiming to support the "DirCache=1" subprotocol version.
288 Technically, we stopped supporting this subprotocol back in
289 0.4.5.1-alpha, but we needed to wait for the authorities to stop
290 listing it as "required" before we could drop it from the list.
293 o Minor bugfixes (logging):
294 - Avoid a spurious log message about missing subprotocol versions,
295 when the consensus that we're reading from is older than the
296 current release. Previously we had made this message nonfatal, but
297 in practice, it is never relevant when the consensus is older than
298 the current release. Fixes bug 40281; bugfix on 0.4.0.1-alpha.
300 o Minor bugfixes (metrics port):
301 - Fix a bug warning when a metrics port socket was unexpectedly
302 closed. Fixes bug 40257; bugfix on 0.4.5.1-alpha
304 o Minor bugfixes (relay):
305 - Allow relays to have a RFC1918 address if PublishServerDescriptor
306 is set to 0 and AssumeReachable is set to 1. This is to support
307 the use case of a bridge on a local network, exposed via a
308 pluggable transport. Fixes bug 40208; bugfix on 0.4.5.1-alpha.
310 o Minor bugfixes (relay, config):
311 - Fix a problem in the removal of duplicate ORPorts from the
312 internal port list when loading the config file. We were removing
313 the wrong ports, breaking valid torrc uses cases for multiple
314 ORPorts of the same address family. Fixes bug 40289; bugfix
318 Changes in version 0.4.5.5-rc - 2021-02-01
319 Tor 0.4.5.5-rc is the third release candidate in its series. We're
320 coming closer and closer to a stable release series. This release
321 fixes an annoyance with address detection code, and somewhat mitigates
322 an ongoing denial-of-service attack.
324 We anticipate no more code changes between this and the stable
325 release, though of course that could change.
327 o Major feature (exit):
328 - Re-entry into the network is now denied at the Exit level to all
329 relays' ORPorts and authorities' ORPorts and DirPorts. This change
330 should help mitgate a set of denial-of-service attacks. Closes
333 o Minor bugfixes (relay, configuration):
334 - Don't attempt to discover our address (IPv4 or IPv6) if no ORPort
335 for it can be found in the configuration. Fixes bug 40254; bugfix
339 Changes in version 0.4.5.4-rc - 2021-01-22
340 Tor 0.4.5.4-rc is the second release candidate in its series. It fixes
341 several bugs present in previous releases.
343 We expect that the stable release will be the same, or almost the
344 same, as this release candidate, unless serious bugs are found.
346 o Major bugfixes (authority, IPv6):
347 - Do not consider multiple relays in the same IPv6 /64 network to be
348 sybils. Fixes bug 40243; bugfix on 0.4.5.1-alpha.
350 o Major bugfixes (directory cache, performance, windows):
351 - Limit the number of items in the consensus diff cache to 64 on
352 Windows. We hope this will mitigate an issue where Windows relay
353 operators reported Tor using 100% CPU, while we investigate better
354 solutions. Fixes bug 24857; bugfix on 0.3.1.1-alpha.
356 o Minor feature (build system):
357 - New "make lsp" command to generate the compile_commands.json file
358 used by the ccls language server. The "bear" program is needed for
359 this. Closes ticket 40227.
361 o Minor features (authority, logging):
362 - Log more information for directory authority operators during the
363 consensus voting process, and while processing relay descriptors.
365 - Reject obsolete router/extrainfo descriptors earlier and more
366 quietly, to avoid spamming the logs. Fixes bug 40238; bugfix
369 o Minor bugfixes (compilation):
370 - Fix another warning about unreachable fallthrough annotations when
371 building with "--enable-all-bugs-are-fatal" on some compilers.
372 Fixes bug 40241; bugfix on 0.4.5.3-rc.
373 - Change the linker flag ordering in our library search code so that
374 it works for compilers that need the libraries to be listed in the
375 right order. Fixes bug 33624; bugfix on 0.1.1.0-alpha.
377 o Minor bugfixes (config, bridge):
378 - Don't initiate a connection to a bridge configured to use a
379 missing transport. This change reverts an earlier fix that would
380 try to avoid such situations during configuration chcecking, but
381 which doesn't work with DisableNetwork. Fixes bug 40106; bugfix
384 o Minor bugfixes (onion services):
385 - Avoid a non-fatal assertion in certain edge-cases when
386 establishing a circuit to an onion service. Fixes bug 32666;
387 bugfix on 0.3.0.3-alpha.
389 o Minor bugfixes (relay):
390 - If we were unable to build our descriptor, don't mark it as having
391 been advertised. Also remove an harmless BUG(). Fixes bug 40231;
392 bugfix on 0.4.5.1-alpha.
395 Changes in version 0.4.5.3-rc - 2021-01-12
396 Tor 0.4.5.3-rc is the first release candidate in its series. It fixes
397 several bugs, including one that broke onion services on certain older
400 Though we anticipate that we'll be doing a bit more clean-up between
401 now and the stable release, we expect that our remaining changes will
402 be fairly simple. There will be at least one more release candidate
403 before 0.4.5.x is stable.
405 o Major bugfixes (onion service v3):
406 - Stop requiring a live consensus for v3 clients and services, and
407 allow a "reasonably live" consensus instead. This allows v3 onion
408 services to work even if the authorities fail to generate a
409 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
412 o Minor features (crypto):
413 - Fix undefined behavior on our Keccak library. The bug only
414 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
415 and would result in wrong digests. Fixes bug 40210; bugfix on
416 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
417 weasel for diagnosing this.
419 o Minor features (documentation):
420 - Mention the "!badexit" directive that can appear in an authority's
421 approved-routers file, and update the description of the
422 "!invalid" directive. Closes ticket 40188.
424 o Minor bugfixes (compilation):
425 - Fix a compilation warning about unreachable fallthrough
426 annotations when building with "--enable-all-bugs-are-fatal" on
427 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
428 - Fix the "--enable-static-tor" switch to properly set the "-static"
429 compile option onto the tor binary only. Fixes bug 40111; bugfix
432 o Minor bugfixes (config, bridge):
433 - Really fix the case where torrc has a missing ClientTransportPlugin
434 but is configured with a Bridge line and UseBridges. Previously,
435 we didn't look at the managed proxy list and thus would fail for
436 the "exec" case. Fixes bug 40106; bugfix on 0.4.5.1-alpha.
438 o Minor bugfixes (logging, relay):
439 - Log our address as reported by the directory authorities, if none
440 was configured or detected before. Fixes bug 40201; bugfix
442 - When a launching bandwidth testing circuit, don't incorrectly call
443 it a reachability test, or trigger a "CHECKING_REACHABILITY"
444 control event. Fixes bug 40205; bugfix on 0.4.5.1-alpha.
446 o Minor bugfixes (relay, statistics):
447 - Report the correct connection statistics in our extrainfo
448 documents. Previously there was a problem in the file loading
449 function which would wrongly truncate a state file, causing the
450 wrong information to be reported. Fixes bug 40226; bugfix
453 o Minor bugfixes (SOCKS5):
454 - Handle partial SOCKS5 messages correctly. Previously, our code
455 would send an incorrect error message if it got a SOCKS5 request
456 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
459 Changes in version 0.4.5.2-alpha - 2020-11-23
460 Tor 0.4.5.2-alpha is the second alpha release in the 0.4.5.x series.
461 It fixes several bugs present in earlier releases, including one that
462 made it impractical to run relays on Windows. It also adds a few small
463 safety features to improve Tor's behavior in the presence of strange
464 compile-time options, misbehaving proxies, and future versions
467 o Major bugfixes (relay, windows):
468 - Fix a bug in our implementation of condition variables on Windows.
469 Previously, a relay on Windows would use 100% CPU after running
470 for some time. Because of this change, Tor now require Windows
471 Vista or later to build and run. Fixes bug 30187; bugfix on
472 0.2.6.3-alpha. (This bug became more serious in 0.3.1.1-alpha with
473 the introduction of consensus diffs.) Patch by Daniel Pinto.
475 o Minor features (compilation):
476 - Disable deprecation warnings when building with OpenSSL 3.0.0 or
477 later. There are a number of APIs newly deprecated in OpenSSL
478 3.0.0 that Tor still requires. (A later version of Tor will try to
479 stop depending on these APIs.) Closes ticket 40165.
481 o Minor features (protocol, proxy support, defense in depth):
482 - Respond more deliberately to misbehaving proxies that leave
483 leftover data on their connections, so as to make Tor even less
484 likely to allow the proxies to pass their data off as having come
485 from a relay. Closes ticket 40017.
487 o Minor features (safety):
488 - Log a warning at startup if Tor is built with compile-time options
489 that are likely to make it less stable or reliable. Closes
492 o Minor bugfixes (circuit, handshake):
493 - In the v3 handshaking code, use connection_or_change_state() to
494 change the state. Previously, we changed the state directly, but
495 this did not pass the state change to the pubsub or channel
496 objects, potentially leading to bugs. Fixes bug 32880; bugfix on
497 0.2.3.6-alpha. Patch by Neel Chauhan.
499 o Minor bugfixes (compilation):
500 - Use the correct 'ranlib' program when building libtor.a.
501 Previously we used the default ranlib, which broke some kinds of
502 cross-compilation. Fixes bug 40172; bugfix on 0.4.5.1-alpha.
503 - Remove a duplicate typedef in metrics_store.c. Fixes bug 40177;
504 bugfix on 0.4.5.1-alpha.
505 - When USDT tracing is enabled, and STAP_PROBEV() is missing, don't
506 attempt to build. Linux supports that macro but not the BSDs.
507 Fixes bug 40174; bugfix on 0.4.5.1-alpha.
509 o Minor bugfixes (configuration):
510 - Exit Tor on a misconfiguration when the Bridge line is configured
511 to use a transport but no corresponding ClientTransportPlugin can
512 be found. Prior to this fix, Tor would attempt to connect to the
513 bridge directly without using the transport, making it easier for
514 adversaries to notice the bridge. Fixes bug 25528; bugfix
516 - Fix an issue where an ORPort was compared with other kinds of
517 ports, when it should have been only checked against other
518 ORPorts. This bug would lead to "DirPort auto" getting ignored.
519 Fixes bug 40195; bugfix on 0.4.5.1-alpha.
520 - Fix a bug where a second non-ORPort with a variant family (ex:
521 SocksPort [::1]:9050) would be ignored due to a configuration
522 parsing error. Fixes bug 40183; bugfix on 0.4.5.1-alpha.
524 o Minor bugfixes (crash, relay, signing key):
525 - Avoid assertion failures when we run Tor from the command line
526 with `--key-expiration sign`, but an ORPort is not set. Fixes bug
527 40015; bugfix on 0.3.2.1-alpha. Patch by Neel Chauhan.
529 o Minor bugfixes (logging):
530 - Remove trailing whitespace from control event log messages. Fixes
531 bug 32178; bugfix on 0.1.1.1-alpha. Based on a patch by
533 - Turn warning-level log message about SENDME failure into a debug-
534 level message. (This event can happen naturally, and is no reason
535 for concern). Fixes bug 40142; bugfix on 0.4.1.1-alpha.
537 o Minor bugfixes (relay, address discovery):
538 - Don't trigger an IP change when no new valid IP can be found.
539 Fixes bug 40071; bugfix on 0.4.5.1-alpha.
540 - When attempting to discover our IP, use a simple test circuit,
541 rather than a descriptor fetch: the same address information is
542 present in NETINFO cells, and is better authenticated there. Fixes
543 bug 40071; bugfix on 0.4.5.1-alpha.
545 o Minor bugfixes (testing):
546 - Fix the `config/parse_tcp_proxy_line` test so that it works
547 correctly on systems where the DNS provider hijacks invalid
548 queries. Fixes part of bug 40179; bugfix on 0.4.3.1-alpha.
549 - Fix unit tests that used newly generated list of routers so that
550 they check them with respect to the date when they were generated,
551 not with respect to the current time. Fixes bug 40187; bugfix
553 - Fix our Python reference-implementation for the v3 onion service
554 handshake so that it works correctly with the version of hashlib
555 provided by Python 3.9. Fixes part of bug 40179; bugfix
557 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
558 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
560 o Removed features (controller):
561 - Remove the "GETINFO network-status" controller command. It has
562 been deprecated since 0.3.1.1-alpha. Closes ticket 22473.
565 Changes in version 0.4.4.6 - 2020-11-12
566 Tor 0.4.4.6 is the second stable release in the 0.4.4.x series. It
567 backports fixes from later releases, including a fix for TROVE-2020-
568 005, a security issue that could be used, under certain cases, by an
569 adversary to observe traffic patterns on a limited number of circuits
570 intended for a different relay.
572 o Major bugfixes (security, backport from 0.4.5.1-alpha):
573 - When completing a channel, relays now check more thoroughly to
574 make sure that it matches any pending circuits before attaching
575 those circuits. Previously, address correctness and Ed25519
576 identities were not checked in this case, but only when extending
577 circuits on an existing channel. Fixes bug 40080; bugfix on
578 0.2.7.2-alpha. Resolves TROVE-2020-005.
580 o Minor features (directory authorities, backport from 0.4.5.1-alpha):
581 - Authorities now list a different set of protocols as required and
582 recommended. These lists have been chosen so that only truly
583 recommended and/or required protocols are included, and so that
584 clients using 0.2.9 or later will continue to work (even though
585 they are not supported), whereas only relays running 0.3.5 or
586 later will meet the requirements. Closes ticket 40162.
587 - Make it possible to specify multiple ConsensusParams torrc lines.
588 Now directory authority operators can for example put the main
589 ConsensusParams config in one torrc file and then add to it from a
590 different torrc file. Closes ticket 40164.
592 o Minor features (subprotocol versions, backport from 0.4.5.1-alpha):
593 - Tor no longer allows subprotocol versions larger than 63.
594 Previously version numbers up to UINT32_MAX were allowed, which
595 significantly complicated our code. Implements proposal 318;
598 o Minor features (tests, v2 onion services, backport from 0.4.5.1-alpha):
599 - Fix a rendezvous cache unit test that was triggering an underflow
600 on the global rend cache allocation. Fixes bug 40125; bugfix
602 - Fix another rendezvous cache unit test that was triggering an
603 underflow on the global rend cache allocation. Fixes bug 40126;
604 bugfix on 0.2.8.1-alpha.
606 o Minor bugfixes (compilation, backport from 0.4.5.1-alpha):
607 - Fix compiler warnings that would occur when building with
608 "--enable-all-bugs-are-fatal" and "--disable-module-relay" at the
609 same time. Fixes bug 40129; bugfix on 0.4.4.1-alpha.
610 - Resolve a compilation warning that could occur in
611 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
613 o Minor bugfixes (logging, backport from 0.4.5.1-alpha):
614 - Remove a debug logging statement that uselessly spammed the logs.
615 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
617 o Minor bugfixes (relay configuration, crash, backport from 0.4.5.1-alpha):
618 - Avoid a fatal assert() when failing to create a listener
619 connection for an address that was in use. Fixes bug 40073; bugfix
622 o Minor bugfixes (v2 onion services, backport from 0.4.5.1-alpha):
623 - For HSFETCH commands on v2 onion services addresses, check the
624 length of bytes decoded, not the base32 length. Fixes bug 34400;
625 bugfix on 0.4.1.1-alpha. Patch by Neel Chauhan.
628 Changes in version 0.4.3.7 - 2020-11-12
629 Tor 0.4.3.7 backports several bugfixes from later releases. It
630 includes a fix for TROVE-2020-005, a security issue that could be
631 used, under certain cases, by an adversary to observe traffic patterns
632 on a limited number of circuits intended for a different relay.
634 Please be aware that support for the 0.4.3.x series will end on 15
635 February 2021. Please upgrade to 0.4.4.x or 0.4.5.x before then, or
636 downgrade to 0.3.5.x, which will be supported until at least 1
639 o Major features (fallback directory list, backport form 0.4.4.3-alpha):
640 - Replace the 148 fallback directories originally included in Tor
641 0.4.1.4-rc (of which around 105 are still functional) with a list
642 of 144 fallbacks generated in July 2020. Closes ticket 40061.
644 o Major bugfixes (security, backport from 0.4.5.1-alpha):
645 - When completing a channel, relays now check more thoroughly to
646 make sure that it matches any pending circuits before attaching
647 those circuits. Previously, address correctness and Ed25519
648 identities were not checked in this case, but only when extending
649 circuits on an existing channel. Fixes bug 40080; bugfix on
650 0.2.7.2-alpha. Resolves TROVE-2020-005.
652 o Major bugfixes (NSS, backport from 0.4.4.3-alpha):
653 - When running with NSS enabled, make sure that NSS knows to expect
654 nonblocking sockets. Previously, we set our TCP sockets as
655 nonblocking, but did not tell NSS, which in turn could lead to
656 unexpected blocking behavior. Fixes bug 40035; bugfix
659 o Minor features (security, backport from 0.4.4.4-rc):
660 - Channels using obsolete versions of the Tor link protocol are no
661 longer allowed to circumvent address-canonicity checks. (This is
662 only a minor issue, since such channels have no way to set ed25519
663 keys, and therefore should always be rejected for circuits that
664 specify ed25519 identities.) Closes ticket 40081.
666 o Minor features (subprotocol versions, backport from 0.4.5.1-alpha):
667 - Tor no longer allows subprotocol versions larger than 63.
668 Previously version numbers up to UINT32_MAX were allowed, which
669 significantly complicated our code. Implements proposal 318;
672 o Minor features (tests, backport from 0.4.4.5):
673 - Our "make check" target now runs the unit tests in 8 parallel
674 chunks. Doing this speeds up hardened CI builds by more than a
675 factor of two. Closes ticket 40098.
677 o Minor features (tests, v2 onion services, backport from 0.4.5.1-alpha):
678 - Fix a rendezvous cache unit test that was triggering an underflow
679 on the global rend cache allocation. Fixes bug 40125; bugfix
681 - Fix another rendezvous cache unit test that was triggering an
682 underflow on the global rend cache allocation. Fixes bug 40126;
683 bugfix on 0.2.8.1-alpha.
685 o Minor bugfixes (correctness, buffers, backport from 0.4.4.4-rc):
686 - Fix a correctness bug that could cause an assertion failure if we
687 ever tried using the buf_move_all() function with an empty input
688 buffer. As far as we know, no released versions of Tor do this.
689 Fixes bug 40076; bugfix on 0.3.3.1-alpha.
691 o Minor bugfixes (logging, backport from 0.4.5.1-alpha):
692 - Remove a debug logging statement that uselessly spammed the logs.
693 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
695 o Minor bugfixes (rate limiting, bridges, pluggable transports, backport from 0.4.4.4-rc):
696 - On a bridge, treat all connections from an ExtORPort as remote by
697 default for the purposes of rate-limiting. Previously, bridges
698 would treat the connection as local unless they explicitly
699 received a "USERADDR" command. ExtORPort connections still count
700 as local if there is a USERADDR command with an explicit local
701 address. Fixes bug 33747; bugfix on 0.2.5.1-alpha.
703 o Minor bugfixes (relay configuration, crash, backport from 0.4.5.1-alpha):
704 - Avoid a fatal assert() when failing to create a listener
705 connection for an address that was in use. Fixes bug 40073; bugfix
708 o Minor bugfixes (relay, usability, backport from 0.4.4.3-alpha):
709 - Adjust the rules for when to warn about having too many
710 connections to other relays. Previously we'd tolerate up to 1.5
711 connections per relay on average. Now we tolerate more connections
712 for directory authorities, and raise the number of total
713 connections we need to see before we warn. Fixes bug 33880; bugfix
716 o Minor bugfixes (tests, 0.4.4.5):
717 - Fix the behavior of the rend_cache/clean_v2_descs_as_dir when run
718 on its own. Previously, it would exit with an error. Fixes bug
719 40099; bugfix on 0.2.8.1-alpha.
721 o Minor bugfixes (v2 onion services, backport from 0.4.5.1-alpha):
722 - For HSFETCH commands on v2 onion services addresses, check the
723 length of bytes decoded, not the base32 length. Fixes bug 34400;
724 bugfix on 0.4.1.1-alpha. Patch by Neel Chauhan.
726 o Minor bugfixes (windows, backport from 0.4.4.4-rc):
727 - Fix a bug that prevented Tor from starting if its log file grew
728 above 2GB. Fixes bug 31036; bugfix on 0.2.1.8-alpha.
730 o Deprecated features (onion service v2, backport form 0.4.4.2-alpha):
731 - Add a deprecation warning for version 2 onion services. Closes
734 o Removed features (backport from 0.4.4.3-alpha):
735 - Our "check-local" test target no longer tries to use the
736 Coccinelle semantic patching tool parse all the C files. While it
737 is a good idea to try to make sure Coccinelle works on our C
738 before we run a Coccinelle patch, doing so on every test run has
739 proven to be disruptive. You can still run this tool manually with
740 "make check-cocci". Closes ticket 40030. ticket 40030.
743 Changes in version 0.3.5.12 - 2020-11-12
744 Tor 0.4.3.7 backports several bugfixes from later releases. It
745 includes a fix for TROVE-2020-005, a security issue that could be
746 used, under certain cases, by an adversary to observe traffic patterns
747 on a limited number of circuits intended for a different relay.
749 o Major features (fallback directory list, backport form 0.4.4.3-alpha):
750 - Replace the 148 fallback directories originally included in Tor
751 0.4.1.4-rc (of which around 105 are still functional) with a list
752 of 144 fallbacks generated in July 2020. Closes ticket 40061.
754 o Major bugfixes (security, backport from 0.4.5.1-alpha):
755 - When completing a channel, relays now check more thoroughly to
756 make sure that it matches any pending circuits before attaching
757 those circuits. Previously, address correctness and Ed25519
758 identities were not checked in this case, but only when extending
759 circuits on an existing channel. Fixes bug 40080; bugfix on
760 0.2.7.2-alpha. Resolves TROVE-2020-005.
762 o Major bugfixes (NSS, backport from 0.4.4.3-alpha):
763 - When running with NSS enabled, make sure that NSS knows to expect
764 nonblocking sockets. Previously, we set our TCP sockets as
765 nonblocking, but did not tell NSS, which in turn could lead to
766 unexpected blocking behavior. Fixes bug 40035; bugfix
769 o Minor features (security, backport from 0.4.4.4-rc):
770 - Channels using obsolete versions of the Tor link protocol are no
771 longer allowed to circumvent address-canonicity checks. (This is
772 only a minor issue, since such channels have no way to set ed25519
773 keys, and therefore should always be rejected for circuits that
774 specify ed25519 identities.) Closes ticket 40081.
776 o Minor features (debugging, directory system):
777 - Don't crash when we find a non-guard with a guard-fraction value
778 set. Instead, log a bug warning, in an attempt to figure out how
779 this happened. Diagnostic for ticket 32868.
781 o Minor features (subprotocol versions, backport from 0.4.5.1-alpha):
782 - Tor no longer allows subprotocol versions larger than 63.
783 Previously version numbers up to UINT32_MAX were allowed, which
784 significantly complicated our code. Implements proposal 318;
787 o Minor features (tests, backport from 0.4.4.5):
788 - Our "make check" target now runs the unit tests in 8 parallel
789 chunks. Doing this speeds up hardened CI builds by more than a
790 factor of two. Closes ticket 40098.
792 o Minor features (tests, v2 onion services, backport from 0.4.5.1-alpha):
793 - Fix a rendezvous cache unit test that was triggering an underflow
794 on the global rend cache allocation. Fixes bug 40125; bugfix
796 - Fix another rendezvous cache unit test that was triggering an
797 underflow on the global rend cache allocation. Fixes bug 40126;
798 bugfix on 0.2.8.1-alpha.
800 o Minor bugfixes (correctness, buffers, backport from 0.4.4.4-rc):
801 - Fix a correctness bug that could cause an assertion failure if we
802 ever tried using the buf_move_all() function with an empty input
803 buffer. As far as we know, no released versions of Tor do this.
804 Fixes bug 40076; bugfix on 0.3.3.1-alpha.
806 o Minor bugfixes (logging, backport from 0.4.5.1-alpha):
807 - Remove a debug logging statement that uselessly spammed the logs.
808 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
810 o Minor bugfixes (rate limiting, bridges, pluggable transports, backport from 0.4.4.4-rc):
811 - On a bridge, treat all connections from an ExtORPort as remote by
812 default for the purposes of rate-limiting. Previously, bridges
813 would treat the connection as local unless they explicitly
814 received a "USERADDR" command. ExtORPort connections still count
815 as local if there is a USERADDR command with an explicit local
816 address. Fixes bug 33747; bugfix on 0.2.5.1-alpha.
818 o Minor bugfixes (relay configuration, crash, backport from 0.4.5.1-alpha):
819 - Avoid a fatal assert() when failing to create a listener
820 connection for an address that was in use. Fixes bug 40073; bugfix
823 o Minor bugfixes (relay, usability, backport from 0.4.4.3-alpha):
824 - Adjust the rules for when to warn about having too many
825 connections to other relays. Previously we'd tolerate up to 1.5
826 connections per relay on average. Now we tolerate more connections
827 for directory authorities, and raise the number of total
828 connections we need to see before we warn. Fixes bug 33880; bugfix
831 o Minor bugfixes (relays, backport from 0.4.4.1-alpha):
832 - Stop advertising incorrect IPv6 ORPorts in relay and bridge
833 descriptors, when the IPv6 port was configured as "auto". Fixes
834 bug 32588; bugfix on 0.2.3.9-alpha.
836 o Minor bugfixes (tests, 0.4.4.5):
837 - Fix the behavior of the rend_cache/clean_v2_descs_as_dir when run
838 on its own. Previously, it would exit with an error. Fixes bug
839 40099; bugfix on 0.2.8.1-alpha.
841 o Minor bugfixes (windows, backport from 0.4.4.4-rc):
842 - Fix a bug that prevented Tor from starting if its log file grew
843 above 2GB. Fixes bug 31036; bugfix on 0.2.1.8-alpha.
845 o Deprecated features (onion service v2, backport form 0.4.4.2-alpha):
846 - Add a deprecation warning for version 2 onion services. Closes
850 Changes in version 0.4.5.1-alpha - 2020-11-01
851 Tor 0.4.5.1-alpha is the first alpha release in the 0.4.5.x series. It
852 improves support for IPv6, address discovery and self-testing, code
855 This release also fixes TROVE-2020-005, a security issue that could be
856 used, under certain cases, by an adversary to observe traffic patterns
857 on a limited number of circuits intended for a different relay. To
858 mount this attack, the adversary would need to actively extend
859 circuits to an incorrect address, as well as compromise a relay's
860 legacy RSA-1024 key. We'll be backporting this fix to other release
861 series soon, after it has had some testing.
863 Here are the changes since 0.4.4.5.
865 o Major features (build):
866 - When building Tor, first link all object files into a single
867 static library. This may help with embedding Tor in other
868 programs. Note that most Tor functions do not constitute a part of
869 a stable or supported API: only those functions in tor_api.h
870 should be used if embedding Tor. Closes ticket 40127.
872 o Major features (metrics):
873 - Introduce a new MetricsPort which exposes, through an HTTP
874 interface, a series of metrics that tor collects at runtime. At
875 the moment, the only supported output format is Prometheus data
876 model. Closes ticket 40063. See the manual page for more
877 information and security considerations.
878 o Major features (relay, IPv6):
879 - The torrc option Address now supports IPv6. This unifies our
880 address discovery interface to support IPv4, IPv6, and hostnames.
882 - Launch IPv4 and IPv6 ORPort self-test circuits on relays and
883 bridges. Closes ticket 33222.
884 - Relays now automatically bind on IPv6 for their ORPort, unless
885 specified otherwise with the IPv4Only flag. Closes ticket 33246.
886 - When a relay with IPv6 support is told to open a connection to
887 another relay, and the extend cell lists both IPv4 and IPv6
888 addresses, the first relay now picks randomly which address to
889 use. Closes ticket 33220.
890 - Relays now track their IPv6 ORPort reachability separately from
891 the reachability of their IPv4 ORPort. They will not publish a
892 descriptor unless _both_ ports appear to be externally reachable.
895 o Major features (tracing):
896 - Add event-tracing library support for USDT and LTTng-UST, and a
897 few tracepoints in the circuit subsystem. More will come
898 incrementally. This feature is compiled out by default: it needs
899 to be enabled at configure time. See documentation in
900 doc/HACKING/Tracing.md. Closes ticket 32910.
902 o Major bugfixes (security):
903 - When completing a channel, relays now check more thoroughly to
904 make sure that it matches any pending circuits before attaching
905 those circuits. Previously, address correctness and Ed25519
906 identities were not checked in this case, but only when extending
907 circuits on an existing channel. Fixes bug 40080; bugfix on
908 0.2.7.2-alpha. Resolves TROVE-2020-005.
910 o Major bugfixes (TLS, buffer):
911 - When attempting to read N bytes on a TLS connection, really try to
912 read all N bytes. Previously, Tor would stop reading after the
913 first TLS record, which can be smaller than the N bytes requested,
914 and not check for more data until the next mainloop event. Fixes
915 bug 40006; bugfix on 0.1.0.5-rc.
917 o Minor features (address discovery):
918 - If no Address statements are found, relays now prioritize guessing
919 their address by looking at the local interface instead of the
920 local hostname. If the interface address can't be found, the local
921 hostname is used. Closes ticket 33238.
923 o Minor features (admin tools):
924 - Add a new --format argument to -key-expiration option to allow
925 specifying the time format of the expiration date. Adds Unix
926 timestamp format support. Patch by Daniel Pinto. Closes
929 o Minor features (bootstrap reporting):
930 - When reporting bootstrapping status on a relay, do not consider
931 connections that have never been the target of an origin circuit.
932 Previously, all connection failures were treated as potential
933 bootstrapping failures, including connections that had been opened
934 because of client requests. Closes ticket 25061.
936 o Minor features (build):
937 - When running the configure script, try to detect version
938 mismatches between the OpenSSL headers and libraries, and suggest
939 that the user should try "--with-openssl-dir". Closes 40138.
940 - If the configure script has given any warnings, remind the user
941 about them at the end of the script. Related to 40138.
943 o Minor features (configuration):
944 - Allow using wildcards (* and ?) with the %include option on
945 configuration files. Closes ticket 25140. Patch by Daniel Pinto.
946 - Allow the configuration options EntryNodes, ExcludeNodes,
947 ExcludeExitNodes, ExitNodes, MiddleNodes, HSLayer2Nodes and
948 HSLayer3Nodes to be specified multiple times. Closes ticket 28361.
949 Patch by Daniel Pinto.
951 o Minor features (control port):
952 - Add a DROPTIMEOUTS command to drop circuit build timeout history
953 and reset the current timeout. Closes ticket 40002.
954 - When a stream enters the AP_CONN_STATE_CONTROLLER_WAIT status,
955 send a control port event. Closes ticket 32190. Patch by
957 - Introduce GETINFO "stats/ntor/{assigned/requested}" and
958 "stats/tap/{assigned/requested}" to get the NTor and TAP circuit
959 onion handshake counts respectively. Closes ticket 28279. Patch by
962 o Minor features (control port, IPv6):
963 - Tor relays now try to report to the controller when they are
964 launching an IPv6 self-test. Closes ticket 34068.
965 - Introduce "GETINFO address/v4" and "GETINFO address/v6" in the
966 control port to fetch the Tor host's respective IPv4 or IPv6
967 address. We keep "GETINFO address" for backwards-compatibility.
968 Closes ticket 40039. Patch by Neel Chauhan.
970 o Minor features (directory authorities):
971 - Authorities now list a different set of protocols as required and
972 recommended. These lists have been chosen so that only truly
973 recommended and/or required protocols are included, and so that
974 clients using 0.2.9 or later will continue to work (even though
975 they are not supported), whereas only relays running 0.3.5 or
976 later will meet the requirements. Closes ticket 40162.
977 - Add a new consensus method 30 that removes the unnecessary "="
978 padding from ntor-onion-key. Closes ticket 7869. Patch by
980 - Directory authorities now reject descriptors from relays running
981 Tor versions from the obsolete 0.4.1 series. Resolves ticket
982 34357. Patch by Neel Chauhan.
983 - Make it possible to specify multiple ConsensusParams torrc lines.
984 Now directory authority operators can for example put the main
985 ConsensusParams config in one torrc file and then add to it from a
986 different torrc file. Closes ticket 40164.
987 - The AssumeReachable option no longer stops directory authorities
988 from checking whether other relays are running. A new
989 AuthDirTestReachability option can be used to disable these
990 checks. Closes ticket 34445.
991 - When looking for possible Sybil attacks, also consider IPv6
992 addresses. Two routers are considered to have "the same" address
993 by this metric if they are in the same /64 network. Patch from
994 Maurice Pibouin. Closes ticket 7193.
996 o Minor features (directory authorities, IPv6):
997 - Make authorities add their IPv6 ORPort (if any) to the trusted
998 servers list. Authorities previously added only their IPv4
999 addresses. Closes ticket 32822.
1001 o Minor features (ed25519, relay):
1002 - Save a relay's base64-encoded ed25519 identity key to the data
1003 directory in a file named fingerprint-ed25519. Closes ticket
1004 30642. Patch by Neel Chauhan.
1006 o Minor features (heartbeat):
1007 - Include the total number of inbound and outbound IPv4 and IPv6
1008 connections in the heartbeat message. Closes ticket 29113.
1010 o Minor features (IPv6, ExcludeNodes):
1011 - Handle IPv6 addresses in ExcludeNodes; previously they were
1012 ignored. Closes ticket 34065. Patch by Neel Chauhan.
1014 o Minor features (logging):
1015 - Add the running glibc version to the log, and the compiled glibc
1016 version to the library list returned when using --library-versions.
1017 Patch from Daniel Pinto. Closes ticket 40047.
1018 - Consider an HTTP 301 response to be an error (like a 404) when
1019 processing a directory response. Closes ticket 40053.
1020 - Log directory fetch statistics as a single line. Closes
1022 - Provide more complete descriptions of our connections when logging
1023 about them. Closes ticket 40041.
1024 - When describing a relay in the logs, we now include its ed25519
1025 identity. Closes ticket 22668.
1027 o Minor features (onion services):
1028 - Only overwrite an onion service's existing hostname file if its
1029 contents are wrong. This enables read-only onion-service
1030 directories. Resolves ticket 40062. Patch by Neel Chauhan.
1032 o Minor features (pluggable transports):
1033 - Add an OutboundBindAddressPT option to allow users to specify
1034 which IPv4 and IPv6 address pluggable transports should use for
1035 outgoing IP packets. Tor does not have a way to enforce that the
1036 pluggable transport honors this option, so each pluggable transport
1037 needs to implement support on its own. Closes ticket 5304.
1039 o Minor features (relay address tracking):
1040 - We now store relay addresses for OR connections in a more logical
1041 way. Previously we would sometimes overwrite the actual address of
1042 a connection with a "canonical address", and then store the "real
1043 address" elsewhere to remember it. We now track the "canonical
1044 address" elsewhere for the cases where we need it, and leave the
1045 connection's address alone. Closes ticket 33898.
1047 o Minor features (relay):
1048 - If a relay is unable to discover its address, attempt to learn it
1049 from the NETINFO cell. Closes ticket 40022.
1050 - Log immediately when launching a relay self-check. Previously we
1051 would try to log before launching checks, or approximately when we
1052 intended to launch checks, but this tended to be error-prone.
1053 Closes ticket 34137.
1055 o Minor features (relay, address discovery):
1056 - If Address option is not found in torrc, attempt to learn our
1057 address with the configured ORPort address if any. Closes
1060 o Minor features (relay, IPv6):
1061 - Add an AssumeReachableIPv6 option to disable self-checking IPv6
1062 reachability. Closes part of ticket 33224.
1063 - Add new "assume-reachable" and "assume-reachable-ipv6" consensus
1064 parameters to be used in an emergency to tell relays that they
1065 should publish even if they cannot complete their ORPort self-
1066 checks. Closes ticket 34064 and part of 33224.
1067 - Allow relays to send IPv6-only extend cells. Closes ticket 33222.
1068 - Declare support for the Relay=3 subprotocol version. Closes
1070 - When launching IPv6 ORPort self-test circuits, make sure that the
1071 second-last hop can initiate an IPv6 extend. Closes ticket 33222.
1073 o Minor features (specification update):
1074 - Several fields in microdescriptors, router descriptors, and
1075 consensus documents that were formerly optional are now required.
1076 Implements proposal 315; closes ticket 40132.
1078 o Minor features (state management):
1079 - When loading the state file, remove entries from the statefile
1080 that have been obsolete for a long time. Ordinarily Tor preserves
1081 unrecognized entries in order to keep forward-compatibility, but
1082 these entries have not actually been used in any release since
1083 before 0.3.5.x. Closes ticket 40137.
1085 o Minor features (statistics, ipv6):
1086 - Relays now publish IPv6-specific counts of single-direction versus
1087 bidirectional relay connections. Closes ticket 33264.
1088 - Relays now publish their IPv6 read and write statistics over time,
1089 if statistics are enabled. Closes ticket 33263.
1091 o Minor features (subprotocol versions):
1092 - Tor no longer allows subprotocol versions larger than 63.
1093 Previously version numbers up to UINT32_MAX were allowed, which
1094 significantly complicated our code. Implements proposal 318;
1095 closes ticket 40133.
1096 - Use the new limitations on subprotocol versions due to proposal
1097 318 to simplify our implementation. Part of ticket 40133.
1099 o Minor features (testing configuration):
1100 - The TestingTorNetwork option no longer implicitly sets
1101 AssumeReachable to 1. This change allows us to test relays' self-
1102 testing mechanisms, and to test authorities' relay-testing
1103 functionality. Closes ticket 34446.
1105 o Minor features (testing):
1106 - Added unit tests for channel_matches_target_addr_for_extend().
1107 Closes Ticket 33919. Patch by MrSquanchee.
1109 o Minor features (tests, v2 onion services):
1110 - Fix a rendezvous cache unit test that was triggering an underflow
1111 on the global rend cache allocation. Fixes bug 40125; bugfix
1113 - Fix another rendezvous cache unit test that was triggering an
1114 underflow on the global rend cache allocation. Fixes bug 40126;
1115 bugfix on 0.2.8.1-alpha.
1117 o Minor bugfixes (circuit padding):
1118 - When circpad_send_padding_cell_for_callback is called,
1119 `is_padding_timer_scheduled` flag was not reset. Now it is set to
1120 0 at the top of that function. Fixes bug 32671; bugfix
1122 - Add a per-circuit padding machine instance counter, so we can
1123 differentiate between shutdown requests for old machines on a
1124 circuit. Fixes bug 30992; bugfix on 0.4.1.1-alpha.
1125 - Add the ability to keep circuit padding machines if they match a
1126 set of circuit states or purposes. This allows us to have machines
1127 that start up under some conditions but don't shut down under
1128 others. We now use this mask to avoid starting up introduction
1129 circuit padding again after the machines have already completed.
1130 Fixes bug 32040; bugfix on 0.4.1.1-alpha.
1132 o Minor bugfixes (compatibility):
1133 - Strip '\r' characters when reading text files on Unix platforms.
1134 This should resolve an issue where a relay operator migrates a
1135 relay from Windows to Unix, but does not change the line ending of
1136 Tor's various state files to match the platform, and the CRLF line
1137 endings from Windows end up leaking into other files such as the
1138 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
1140 o Minor bugfixes (compilation):
1141 - Fix compiler warnings that would occur when building with
1142 "--enable-all-bugs-are-fatal" and "--disable-module-relay" at the
1143 same time. Fixes bug 40129; bugfix on 0.4.4.1-alpha.
1144 - Resolve a compilation warning that could occur in
1145 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
1147 o Minor bugfixes (configuration):
1148 - Fix bug where %including a pattern ending with */ would include
1149 files and folders (instead of folders only) in versions of glibc <
1150 2.19. Fixes bug 40141; bugfix on 0.4.5.0-alpha-dev. Patch by
1153 o Minor bugfixes (control port):
1154 - Make sure we send the SOCKS request address in relay begin cells
1155 when a stream is attached with the purpose
1156 CIRCUIT_PURPOSE_CONTROLLER. Fixes bug 33124; bugfix on 0.0.5.
1157 Patch by Neel Chauhan.
1159 o Minor bugfixes (logging):
1160 - Remove a debug logging statement that uselessly spammed the logs.
1161 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
1162 - When logging a rate-limited message about how many messages have
1163 been suppressed in the last N seconds, give an accurate value for
1164 N, rounded up to the nearest minute. Previously we would report
1165 the size of the rate-limiting interval, regardless of when the
1166 messages started to occur. Fixes bug 19431; bugfix
1169 o Minor bugfixes (relay configuration, crash):
1170 - Avoid a fatal assert() when failing to create a listener
1171 connection for an address that was in use. Fixes bug 40073; bugfix
1174 o Minor bugfixes (rust, protocol versions):
1175 - Declare support for the onion service introduction point denial of
1176 service extensions when building with Rust. Fixes bug 34248;
1177 bugfix on 0.4.2.1-alpha.
1178 - Make Rust protocol version support checks consistent with the
1179 undocumented error behavior of the corresponding C code. Fixes bug
1180 34251; bugfix on 0.3.3.5-rc.
1182 o Minor bugfixes (self-testing):
1183 - When receiving an incoming circuit, only accept it as evidence
1184 that we are reachable if the declared address of its channel is
1185 the same address we think that we have. Otherwise, it could be
1186 evidence that we're reachable on some other address. Fixes bug
1187 20165; bugfix on 0.1.0.1-rc.
1189 o Minor bugfixes (spec conformance):
1190 - Use the correct key type when generating signing->link
1191 certificates. Fixes bug 40124; bugfix on 0.2.7.2-alpha.
1193 o Minor bugfixes (subprotocol versions):
1194 - Consistently reject extra commas, instead of only rejecting
1195 leading commas. Fixes bug 27194; bugfix on 0.2.9.4-alpha.
1196 - In summarize_protover_flags(), treat empty strings the same as
1197 NULL. This prevents protocols_known from being set. Previously, we
1198 treated empty strings as normal strings, which led to
1199 protocols_known being set. Fixes bug 34232; bugfix on
1200 0.3.3.2-alpha. Patch by Neel Chauhan.
1202 o Minor bugfixes (v2 onion services):
1203 - For HSFETCH commands on v2 onion services addresses, check the
1204 length of bytes decoded, not the base32 length. Fixes bug 34400;
1205 bugfix on 0.4.1.1-alpha. Patch by Neel Chauhan.
1207 o Code simplification and refactoring:
1208 - Add and use a set of functions to perform down-casts on constant
1209 connection and channel pointers. Closes ticket 40046.
1210 - Refactor our code that logs descriptions of connections, channels,
1211 and the peers on them, to use a single call path. This change
1212 enables us to refactor the data types that they use, and eliminates
1213 many confusing usages of those types. Closes ticket 40041.
1214 - Refactor some common node selection code into a single function.
1215 Closes ticket 34200.
1216 - Remove the now-redundant 'outbuf_flushlen' field from our
1217 connection type. It was previously used for an older version of
1218 our rate-limiting logic. Closes ticket 33097.
1219 - Rename "fascist_firewall_*" identifiers to "reachable_addr_*"
1220 instead, for consistency with other code. Closes ticket 18106.
1221 - Rename functions about "advertised" ports which are not in fact
1222 guaranteed to return the ports that have been advertised. Closes
1224 - Split implementation of several command line options from
1225 options_init_from_torrc into smaller isolated functions. Patch by
1226 Daniel Pinto. Closes ticket 40102.
1227 - When an extend cell is missing an IPv4 or IPv6 address, fill in
1228 the address from the extend info. This is similar to what was done
1229 in ticket 33633 for ed25519 keys. Closes ticket 33816. Patch by
1232 o Deprecated features:
1233 - The "non-builtin" argument to the "--dump-config" command is now
1234 deprecated. When it works, it behaves the same as "short", which
1235 you should use instead. Closes ticket 33398.
1238 - Replace URLs from our old bugtracker so that they refer to the new
1239 bugtracker and wiki. Closes ticket 40101.
1242 - We no longer ship or build a "tor.service" file for use with
1243 systemd. No distribution included this script unmodified, and we
1244 don't have the expertise ourselves to maintain this in a way that
1245 all the various systemd-based distributions can use. Closes
1247 - We no longer ship support for the Android logging API. Modern
1248 versions of Android can use the syslog API instead. Closes
1250 - The "optimistic data" feature is now always on; there is no longer
1251 an option to disable it from the torrc file or from the consensus
1252 directory. Closes part of 40139.
1253 - The "usecreatefast" network parameter is now removed; there is no
1254 longer an option for authorities to turn it off. Closes part
1258 - Add unit tests for bandwidth statistics manipulation functions.
1259 Closes ticket 33812. Patch by MrSquanchee.
1261 o Code simplification and refactoring (autoconf):
1262 - Remove autoconf checks for unused funcs and headers. Closes ticket
1263 31699; Patch by @bduszel
1265 o Code simplification and refactoring (maintainer scripts):
1266 - Disable by default the pre-commit hook. Use the environment
1267 variable TOR_EXTRA_PRE_COMMIT_CHECKS in order to run it.
1268 Furthermore, stop running practracker in the pre-commit hook and
1269 make check-local. Closes ticket 40019.
1271 o Code simplification and refactoring (relay address):
1272 - Most of IPv4 representation was using "uint32_t". It has now been
1273 moved to use the internal "tor_addr_t" interface instead. This is
1274 so we can properly integrate IPv6 along IPv4 with common
1275 interfaces. Closes ticket 40043.
1277 o Documentation (manual page):
1278 - Move them from doc/ to doc/man/. Closes ticket 40044.
1279 - Describe the status of the "Sandbox" option more accurately. It is
1280 no longer "experimental", but it _is_ dependent on kernel and libc
1281 versions. Closes ticket 23378.
1283 o Documentation (tracing):
1284 - Document in depth the circuit subsystem trace events in the new
1285 doc/tracing/EventsCircuit.md. Closes ticket 40036.
1288 Changes in version 0.4.4.5 - 2020-09-15
1289 Tor 0.4.4.5 is the first stable release in the 0.4.4.x series. This
1290 series improves our guard selection algorithms, adds v3 onion balance
1291 support, improves the amount of code that can be disabled when running
1292 without relay support, and includes numerous small bugfixes and
1293 enhancements. It also lays the ground for some IPv6 features that
1294 we'll be developing more in the next (0.4.5) series.
1296 Per our support policy, we support each stable release series for nine
1297 months after its first stable release, or three months after the first
1298 stable release of the next series: whichever is longer. This means
1299 that 0.4.4.x will be supported until around June 2021--or later, if
1300 0.4.5.x is later than anticipated.
1302 Note also that support for 0.4.2.x has just ended; support for 0.4.3
1303 will continue until Feb 15, 2021. We still plan to continue supporting
1304 0.3.5.x, our long-term stable series, until Feb 2022.
1306 Below are the changes since 0.4.4.4-rc. For a complete list of changes
1307 since 0.4.3.6, see the ReleaseNotes file.
1309 o Major bugfixes (onion services, DoS):
1310 - Correct handling of parameters for the onion service DoS defense.
1311 Previously, the consensus parameters for the onion service DoS
1312 defenses were overwriting the parameters set by the service
1313 operator using HiddenServiceEnableIntroDoSDefense. Fixes bug
1314 40109; bugfix on 0.4.2.1-alpha.
1316 o Major bugfixes (stats, onion services):
1317 - Fix a bug where we were undercounting the Tor network's total
1318 onion service traffic, by ignoring any traffic originating from
1319 clients. Now we count traffic from both clients and services.
1320 Fixes bug 40117; bugfix on 0.2.6.2-alpha.
1322 o Minor features (control port):
1323 - If a ClientName was specified in ONION_CLIENT_AUTH_ADD for an
1324 onion service, display it when we use ONION_CLIENT_AUTH_VIEW.
1325 Closes ticket 40089. Patch by Neel Chauhan.
1327 o Minor features (denial-of-service memory limiter):
1328 - Allow the user to configure even lower values for the
1329 MaxMemInQueues parameter. Relays now enforce a minimum of 64 MB,
1330 when previously the minimum was 256 MB. On clients, there is no
1331 minimum. Relays and clients will both warn if the value is set so
1332 low that Tor is likely to stop working. Closes ticket 24308.
1334 o Minor features (tests):
1335 - Our "make check" target now runs the unit tests in 8 parallel
1336 chunks. Doing this speeds up hardened CI builds by more than a
1337 factor of two. Closes ticket 40098.
1339 o Minor bugfixes (guard selection algorithm):
1340 - Avoid needless guard-related warning when upgrading from 0.4.3 to
1341 0.4.4. Fixes bug 40105; bugfix on 0.4.4.1-alpha.
1343 o Minor bugfixes (tests):
1344 - Fix the behavior of the rend_cache/clean_v2_descs_as_dir when run
1345 on its own. Previously, it would exit with an error. Fixes bug
1346 40099; bugfix on 0.2.8.1-alpha.
1349 Changes in version 0.4.4.3-alpha - 2020-07-27
1350 Tor 0.4.4.3-alpha fixes several annoyances in previous versions,
1351 including one affecting NSS users, and several affecting the Linux
1354 o Major features (fallback directory list):
1355 - Replace the 148 fallback directories originally included in Tor
1356 0.4.1.4-rc (of which around 105 are still functional) with a list
1357 of 144 fallbacks generated in July 2020. Closes ticket 40061.
1359 o Major bugfixes (NSS):
1360 - When running with NSS enabled, make sure that NSS knows to expect
1361 nonblocking sockets. Previously, we set our TCP sockets as
1362 nonblocking, but did not tell NSS, which in turn could lead to
1363 unexpected blocking behavior. Fixes bug 40035; bugfix
1366 o Minor bugfixes (linux seccomp2 sandbox):
1367 - Fix a regression on sandboxing rules for the openat() syscall. The
1368 fix for bug 25440 fixed the problem on systems with glibc >= 2.27
1369 but broke with versions of glibc. We now choose a rule based on
1370 the glibc version. Patch from Daniel Pinto. Fixes bug 27315;
1372 - Makes the seccomp sandbox allow the correct syscall for opendir
1373 according to the running glibc version. This fixes crashes when
1374 reloading torrc with sandbox enabled when running on glibc 2.15 to
1375 2.21 and 2.26. Patch from Daniel Pinto. Fixes bug 40020; bugfix
1378 o Minor bugfixes (relay, usability):
1379 - Adjust the rules for when to warn about having too many
1380 connections to other relays. Previously we'd tolerate up to 1.5
1381 connections per relay on average. Now we tolerate more connections
1382 for directory authorities, and raise the number of total
1383 connections we need to see before we warn. Fixes bug 33880; bugfix
1387 - Replace most http:// URLs in our code and documentation with
1388 https:// URLs. (We have left unchanged the code in src/ext/, and
1389 the text in LICENSE.) Closes ticket 31812. Patch from Jeremy Rand.
1392 - Our "check-local" test target no longer tries to use the
1393 Coccinelle semantic patching tool parse all the C files. While it
1394 is a good idea to try to make sure Coccinelle works on our C
1395 before we run a Coccinelle patch, doing so on every test run has
1396 proven to be disruptive. You can still run this tool manually with
1397 "make check-cocci". Closes ticket 40030.
1400 Changes in version 0.3.5.11 - 2020-07-09
1401 Tor 0.3.5.11 backports fixes from later tor releases, including several
1402 usability, portability, and reliability fixes.
1404 This release also fixes TROVE-2020-001, a medium-severity denial of
1405 service vulnerability affecting all versions of Tor when compiled with
1406 the NSS encryption library. (This is not the default configuration.)
1407 Using this vulnerability, an attacker could cause an affected Tor
1408 instance to crash remotely. This issue is also tracked as CVE-2020-
1409 15572. Anybody running a version of Tor built with the NSS library
1410 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
1413 o Major bugfixes (NSS, security, backport from 0.4.4.2-alpha):
1414 - Fix a crash due to an out-of-bound memory access when Tor is
1415 compiled with NSS support. Fixes bug 33119; bugfix on
1416 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
1419 o Major bugfixes (DoS defenses, bridges, pluggable transport, backport from 0.4.3.4-rc):
1420 - Fix a bug that was preventing DoS defenses from running on bridges
1421 with a pluggable transport. Previously, the DoS subsystem was not
1422 given the transport name of the client connection, thus failed to
1423 find the GeoIP cache entry for that client address. Fixes bug
1424 33491; bugfix on 0.3.3.2-alpha.
1426 o Minor features (testing, backport from 0.4.3.4-rc):
1427 - The unit tests now support a "TOR_SKIP_TESTCASES" environment
1428 variable to specify a list of space-separated test cases that
1429 should not be executed. We will use this to disable certain tests
1430 that are failing on Appveyor because of mismatched OpenSSL
1431 libraries. Part of ticket 33643.
1433 o Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha):
1434 - Use the correct 64-bit printf format when compiling with MINGW on
1435 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
1437 o Minor bugfix (relay, configuration, backport from 0.4.3.3-alpha):
1438 - Warn if the ContactInfo field is not set, and tell the relay
1439 operator that not having a ContactInfo field set might cause their
1440 relay to get rejected in the future. Fixes bug 33361; bugfix
1443 o Minor bugfixes (client performance, backport from 0.4.4.1-alpha):
1444 - Resume use of preemptively-built circuits when UseEntryGuards is set
1445 to 0. We accidentally disabled this feature with that config
1446 setting, leading to slower load times. Fixes bug 34303; bugfix
1449 o Minor bugfixes (compiler compatibility, backport from 0.4.3.5):
1450 - Avoid compiler warnings from Clang 10 related to the use of GCC-
1451 style "/* falls through */" comments. Both Clang and GCC allow
1452 __attribute__((fallthrough)) instead, so that's what we're using
1453 now. Fixes bug 34078; bugfix on 0.3.1.3-alpha.
1455 o Minor bugfixes (compiler warnings, backport from 0.4.4.2-alpha):
1456 - Fix a compiler warning on platforms with 32-bit time_t values.
1457 Fixes bug 40028; bugfix on 0.3.2.8-rc.
1459 o Minor bugfixes (embedded Tor, backport from 0.4.3.1-alpha):
1460 - When starting Tor any time after the first time in a process,
1461 register the thread in which it is running as the main thread.
1462 Previously, we only did this on Windows, which could lead to bugs
1463 like 23081 on non-Windows platforms. Fixes bug 32884; bugfix
1466 o Minor bugfixes (key portability, backport from 0.4.3.4-rc):
1467 - When reading PEM-encoded key data, tolerate CRLF line-endings even
1468 if we are not running on Windows. Previously, non-Windows hosts
1469 would reject these line-endings in certain positions, making
1470 certain key files hard to move from one host to another. Fixes bug
1471 33032; bugfix on 0.3.5.1-alpha.
1473 o Minor bugfixes (logging, backport from 0.4.4.2-alpha):
1474 - Downgrade a noisy log message that could occur naturally when
1475 receiving an extrainfo document that we no longer want. Fixes bug
1476 16016; bugfix on 0.2.6.3-alpha.
1478 o Minor bugfixes (onion service v3, client, backport from 0.4.3.3-alpha):
1479 - Remove a BUG() warning that would cause a stack trace if an onion
1480 service descriptor was freed while we were waiting for a
1481 rendezvous circuit to complete. Fixes bug 28992; bugfix
1484 o Testing (CI, backport from 0.4.3.4-rc):
1485 - In our Appveyor Windows CI, copy required DLLs to test and app
1486 directories, before running tor's tests. This ensures that tor.exe
1487 and test*.exe use the correct version of each DLL. This fix is not
1488 required, but we hope it will avoid DLL search issues in future.
1489 Fixes bug 33673; bugfix on 0.3.4.2-alpha.
1490 - On Appveyor, skip the crypto/openssl_version test, which is
1491 failing because of a mismatched library installation. Fix
1495 Changes in version 0.4.2.8 - 2020-07-09
1496 Tor 0.4.2.8 backports various fixes from later releases, including
1497 several that affect usability and portability.
1499 This release also fixes TROVE-2020-001, a medium-severity denial of
1500 service vulnerability affecting all versions of Tor when compiled with
1501 the NSS encryption library. (This is not the default configuration.)
1502 Using this vulnerability, an attacker could cause an affected Tor
1503 instance to crash remotely. This issue is also tracked as CVE-2020-
1504 15572. Anybody running a version of Tor built with the NSS library
1505 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
1508 o Major bugfixes (NSS, security, backport from 0.4.4.2-alpha):
1509 - Fix a crash due to an out-of-bound memory access when Tor is
1510 compiled with NSS support. Fixes bug 33119; bugfix on
1511 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
1514 o Major bugfixes (DoS defenses, bridges, pluggable transport, backport from 0.4.3.4-rc):
1515 - Fix a bug that was preventing DoS defenses from running on bridges
1516 with a pluggable transport. Previously, the DoS subsystem was not
1517 given the transport name of the client connection, thus failed to
1518 find the GeoIP cache entry for that client address. Fixes bug
1519 33491; bugfix on 0.3.3.2-alpha.
1521 o Minor feature (sendme, flow control, backport form 0.4.3.4-rc):
1522 - Default to sending SENDME version 1 cells. (Clients are already
1523 sending these, because of a consensus parameter telling them to do
1524 so: this change only affects what clients would do if the
1525 consensus didn't contain a recommendation.) Closes ticket 33623.
1527 o Minor features (diagnostic, backport from 0.4.3.3-alpha):
1528 - Improve assertions and add some memory-poisoning code to try to
1529 track down possible causes of a rare crash (32564) in the EWMA
1530 code. Closes ticket 33290.
1532 o Minor features (testing, backport from 0.4.3.4-rc):
1533 - The unit tests now support a "TOR_SKIP_TESTCASES" environment
1534 variable to specify a list of space-separated test cases that
1535 should not be executed. We will use this to disable certain tests
1536 that are failing on Appveyor because of mismatched OpenSSL
1537 libraries. Part of ticket 33643.
1539 o Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha):
1540 - Use the correct 64-bit printf format when compiling with MINGW on
1541 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
1543 o Minor bugfix (relay, configuration, backport from 0.4.3.3-alpha):
1544 - Warn if the ContactInfo field is not set, and tell the relay
1545 operator that not having a ContactInfo field set might cause their
1546 relay to get rejected in the future. Fixes bug 33361; bugfix
1549 o Minor bugfixes (client performance, backport from 0.4.4.1-alpha):
1550 - Resume use of preemptively-built circuits when UseEntryGuards is set
1551 to 0. We accidentally disabled this feature with that config
1552 setting, leading to slower load times. Fixes bug 34303; bugfix
1555 o Minor bugfixes (compiler compatibility, backport from 0.4.3.5):
1556 - Avoid compiler warnings from Clang 10 related to the use of GCC-
1557 style "/* falls through */" comments. Both Clang and GCC allow
1558 __attribute__((fallthrough)) instead, so that's what we're using
1559 now. Fixes bug 34078; bugfix on 0.3.1.3-alpha.
1560 - Fix compilation warnings with GCC 10.0.1. Fixes bug 34077; bugfix
1563 o Minor bugfixes (compiler warnings, backport from 0.4.4.2-alpha):
1564 - Fix a compiler warning on platforms with 32-bit time_t values.
1565 Fixes bug 40028; bugfix on 0.3.2.8-rc.
1567 o Minor bugfixes (controller protocol, backport from 0.4.3.2-alpha):
1568 - When receiving "ACTIVE" or "DORMANT" signals on the control port,
1569 report them as SIGNAL events. Previously we would log a bug
1570 warning. Fixes bug 33104; bugfix on 0.4.0.1-alpha.
1572 o Minor bugfixes (embedded Tor, backport from 0.4.3.1-alpha):
1573 - When starting Tor any time after the first time in a process,
1574 register the thread in which it is running as the main thread.
1575 Previously, we only did this on Windows, which could lead to bugs
1576 like 23081 on non-Windows platforms. Fixes bug 32884; bugfix
1579 o Minor bugfixes (key portability, backport from 0.4.3.4-rc):
1580 - When reading PEM-encoded key data, tolerate CRLF line-endings even
1581 if we are not running on Windows. Previously, non-Windows hosts
1582 would reject these line-endings in certain positions, making
1583 certain key files hard to move from one host to another. Fixes bug
1584 33032; bugfix on 0.3.5.1-alpha.
1586 o Minor bugfixes (logging, backport from 0.4.3.2-rc):
1587 - When logging a bug, do not say "Future instances of this warning
1588 will be silenced" unless we are actually going to silence them.
1589 Previously we would say this whenever a BUG() check failed in the
1590 code. Fixes bug 33095; bugfix on 0.4.1.1-alpha.
1592 o Minor bugfixes (logging, backport from 0.4.3.4-rc):
1593 - Flush stderr, stdout, and file logs during shutdown, if supported
1594 by the OS. This change helps make sure that any final logs are
1595 recorded. Fixes bug 33087; bugfix on 0.4.1.6.
1597 o Minor bugfixes (logging, backport from 0.4.4.2-alpha):
1598 - Downgrade a noisy log message that could occur naturally when
1599 receiving an extrainfo document that we no longer want. Fixes bug
1600 16016; bugfix on 0.2.6.3-alpha.
1602 o Minor bugfixes (onion service v3, client, backport from 0.4.3.3-alpha):
1603 - Remove a BUG() warning that would cause a stack trace if an onion
1604 service descriptor was freed while we were waiting for a
1605 rendezvous circuit to complete. Fixes bug 28992; bugfix
1608 o Testing (CI, backport from 0.4.3.4-rc):
1609 - In our Appveyor Windows CI, copy required DLLs to test and app
1610 directories, before running tor's tests. This ensures that tor.exe
1611 and test*.exe use the correct version of each DLL. This fix is not
1612 required, but we hope it will avoid DLL search issues in future.
1613 Fixes bug 33673; bugfix on 0.3.4.2-alpha.
1614 - On Appveyor, skip the crypto/openssl_version test, which is
1615 failing because of a mismatched library installation. Fix
1619 Changes in version 0.4.3.6 - 2020-07-09
1620 Tor 0.4.3.6 backports several bugfixes from later releases, including
1621 some affecting usability.
1623 This release also fixes TROVE-2020-001, a medium-severity denial of
1624 service vulnerability affecting all versions of Tor when compiled with
1625 the NSS encryption library. (This is not the default configuration.)
1626 Using this vulnerability, an attacker could cause an affected Tor
1627 instance to crash remotely. This issue is also tracked as CVE-2020-
1628 15572. Anybody running a version of Tor built with the NSS library
1629 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
1632 o Major bugfixes (NSS, security, backport from 0.4.4.2-alpha):
1633 - Fix a crash due to an out-of-bound memory access when Tor is
1634 compiled with NSS support. Fixes bug 33119; bugfix on
1635 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
1638 o Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha):
1639 - Use the correct 64-bit printf format when compiling with MINGW on
1640 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
1642 o Minor bugfixes (client performance, backport from 0.4.4.1-alpha):
1643 - Resume use of preemptively-built circuits when UseEntryGuards is set
1644 to 0. We accidentally disabled this feature with that config
1645 setting, leading to slower load times. Fixes bug 34303; bugfix
1648 o Minor bugfixes (compiler warnings, backport from 0.4.4.2-alpha):
1649 - Fix a compiler warning on platforms with 32-bit time_t values.
1650 Fixes bug 40028; bugfix on 0.3.2.8-rc.
1652 o Minor bugfixes (linux seccomp sandbox, nss, backport from 0.4.4.1-alpha):
1653 - Fix a startup crash when tor is compiled with --enable-nss and
1654 sandbox support is enabled. Fixes bug 34130; bugfix on
1655 0.3.5.1-alpha. Patch by Daniel Pinto.
1657 o Minor bugfixes (logging, backport from 0.4.4.2-alpha):
1658 - Downgrade a noisy log message that could occur naturally when
1659 receiving an extrainfo document that we no longer want. Fixes bug
1660 16016; bugfix on 0.2.6.3-alpha.
1662 o Minor bugfixes (manual page, backport from 0.4.4.1-alpha):
1663 - Update the man page to reflect that MinUptimeHidServDirectoryV2
1664 defaults to 96 hours. Fixes bug 34299; bugfix on 0.2.6.3-alpha.
1666 o Minor bugfixes (onion service v3, backport from 0.4.4.1-alpha):
1667 - Prevent an assert() that would occur when cleaning the client
1668 descriptor cache, and attempting to close circuits for a non-
1669 decrypted descriptor (lacking client authorization). Fixes bug
1670 33458; bugfix on 0.4.2.1-alpha.
1672 o Minor bugfixes (portability, backport from 0.4.4.1-alpha):
1673 - Fix a portability error in the configure script, where we were
1674 using "==" instead of "=". Fixes bug 34233; bugfix on 0.4.3.5.
1676 o Minor bugfixes (relays, backport from 0.4.4.1-alpha):
1677 - Stop advertising incorrect IPv6 ORPorts in relay and bridge
1678 descriptors, when the IPv6 port was configured as "auto". Fixes
1679 bug 32588; bugfix on 0.2.3.9-alpha.
1681 o Documentation (backport from 0.4.4.1-alpha):
1682 - Fix several doxygen warnings related to imbalanced groups. Closes
1686 Changes in version 0.4.4.2-alpha - 2020-07-09
1687 This is the second alpha release in the 0.4.4.x series. It fixes a few
1688 bugs in the previous release, and solves a few usability,
1689 compatibility, and portability issues.
1691 This release also fixes TROVE-2020-001, a medium-severity denial of
1692 service vulnerability affecting all versions of Tor when compiled with
1693 the NSS encryption library. (This is not the default configuration.)
1694 Using this vulnerability, an attacker could cause an affected Tor
1695 instance to crash remotely. This issue is also tracked as CVE-2020-
1696 15572. Anybody running a version of Tor built with the NSS library
1697 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
1700 o Major bugfixes (NSS, security):
1701 - Fix a crash due to an out-of-bound memory access when Tor is
1702 compiled with NSS support. Fixes bug 33119; bugfix on
1703 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
1706 o Minor features (bootstrap reporting):
1707 - Report more detailed reasons for bootstrap failure when the
1708 failure happens due to a TLS error. Previously we would just call
1709 these errors "MISC" when they happened during read, and "DONE"
1710 when they happened during any other TLS operation. Closes
1713 o Minor features (directory authority):
1714 - Authorities now recommend the protocol versions that are supported
1715 by Tor 0.3.5 and later. (Earlier versions of Tor have been
1716 deprecated since January of this year.) This recommendation will
1717 cause older clients and relays to give a warning on startup, or
1718 when they download a consensus directory. Closes ticket 32696.
1720 o Minor features (entry guards):
1721 - Reinstate support for GUARD NEW/UP/DOWN control port events.
1722 Closes ticket 40001.
1724 o Minor features (linux seccomp2 sandbox, portability):
1725 - Allow Tor to build on platforms where it doesn't know how to
1726 report which syscall caused the linux seccomp2 sandbox to fail.
1727 This change should make the sandbox code more portable to less
1728 common Linux architectures. Closes ticket 34382.
1729 - Permit the unlinkat() syscall, which some Libc implementations use
1730 to implement unlink(). Closes ticket 33346.
1732 o Minor bugfix (CI, Windows):
1733 - Use the correct 64-bit printf format when compiling with MINGW on
1734 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
1736 o Minor bugfix (onion service v3 client):
1737 - Remove a BUG() warning that could occur naturally. Fixes bug
1738 34087; bugfix on 0.3.2.1-alpha.
1740 o Minor bugfix (SOCKS, onion service client):
1741 - Detect v3 onion service addresses of the wrong length when
1742 returning the F6 ExtendedErrors code. Fixes bug 33873; bugfix
1745 o Minor bugfixes (compiler warnings):
1746 - Fix a compiler warning on platforms with 32-bit time_t values.
1747 Fixes bug 40028; bugfix on 0.3.2.8-rc.
1749 o Minor bugfixes (control port, onion service):
1750 - Consistently use 'address' in "Invalid v3 address" response to
1751 ONION_CLIENT_AUTH commands. Previously, we would sometimes say
1752 'addr'. Fixes bug 40005; bugfix on 0.4.3.1-alpha.
1754 o Minor bugfixes (logging):
1755 - Downgrade a noisy log message that could occur naturally when
1756 receiving an extrainfo document that we no longer want. Fixes bug
1757 16016; bugfix on 0.2.6.3-alpha.
1759 o Minor bugfixes (onion services v3):
1760 - Avoid a non-fatal assertion failure in certain edge-cases when
1761 opening an intro circuit as a client. Fixes bug 34084; bugfix
1764 o Deprecated features (onion service v2):
1765 - Add a deprecation warning for version 2 onion services. Closes
1768 o Removed features (IPv6, revert):
1769 - Revert the change in the default value of ClientPreferIPv6OrPort:
1770 it breaks the torsocks use case. The SOCKS resolve command has no
1771 mechanism to ask for a specific address family (v4 or v6), and so
1772 prioritizing IPv6 when an IPv4 address is requested on the SOCKS
1773 interface resulted in a failure. Tor Browser explicitly sets
1774 PreferIPv6, so this should not affect the majority of our users.
1775 Closes ticket 33796; bugfix on 0.4.4.1-alpha.
1778 Changes in version 0.4.4.1-alpha - 2020-06-16
1779 This is the first alpha release in the 0.4.4.x series. It improves
1780 our guard selection algorithms, improves the amount of code that
1781 can be disabled when running without relay support, and includes numerous
1782 small bugfixes and enhancements. It also lays the ground for some IPv6
1783 features that we'll be developing more in the next (0.4.5) series.
1785 Here are the changes since 0.4.3.5.
1787 o Major features (Proposal 310, performance + security):
1788 - Implements Proposal 310, "Bandaid on guard selection". Proposal
1789 310 solves load-balancing issues with older versions of the guard
1790 selection algorithm, and improves its security. Under this new
1791 algorithm, a newly selected guard never becomes Primary unless all
1792 previously sampled guards are unreachable. Implements
1793 recommendation from 32088. (Proposal 310 is linked to the CLAPS
1794 project researching optimal client location-aware path selections.
1795 This project is a collaboration between the UCLouvain Crypto Group,
1796 the U.S. Naval Research Laboratory, and Princeton University.)
1798 o Major features (IPv6, relay):
1799 - Consider IPv6-only EXTEND2 cells valid on relays. Log a protocol
1800 warning if the IPv4 or IPv6 address is an internal address, and
1801 internal addresses are not allowed. But continue to use the other
1802 address, if it is valid. Closes ticket 33817.
1803 - If a relay can extend over IPv4 and IPv6, and both addresses are
1804 provided, it chooses between them uniformly at random. Closes
1806 - Re-use existing IPv6 connections for circuit extends. Closes
1808 - Relays may extend circuits over IPv6, if the relay has an IPv6
1809 ORPort, and the client supplies the other relay's IPv6 ORPort in
1810 the EXTEND2 cell. IPv6 extends will be used by the relay IPv6
1811 ORPort self-tests in 33222. Closes ticket 33817.
1813 o Major features (v3 onion services):
1814 - Allow v3 onion services to act as OnionBalance backend instances,
1815 by using the HiddenServiceOnionBalanceInstance torrc option.
1816 Closes ticket 32709.
1818 o Minor feature (developer tools):
1819 - Add a script to help check the alphabetical ordering of option
1820 names in the manual page. Closes ticket 33339.
1822 o Minor feature (onion service client, SOCKS5):
1823 - Add 3 new SocksPort ExtendedErrors (F2, F3, F7) that reports back
1824 new type of onion service connection failures. The semantics of
1825 these error codes are documented in proposal 309. Closes
1828 o Minor feature (onion service v3):
1829 - If a service cannot upload its descriptor(s), log why at INFO
1830 level. Closes ticket 33400; bugfix on 0.3.2.1-alpha.
1832 o Minor feature (python scripts):
1833 - Stop assuming that /usr/bin/python exists. Instead of using a
1834 hardcoded path in scripts that still use Python 2, use
1835 /usr/bin/env, similarly to the scripts that use Python 3. Fixes
1836 bug 33192; bugfix on 0.4.2.
1838 o Minor features (client-only compilation):
1839 - Disable more code related to the ext_orport protocol when
1840 compiling without support for relay mode. Closes ticket 33368.
1841 - Disable more of our self-testing code when support for relay mode
1842 is disabled. Closes ticket 33370.
1844 o Minor features (code safety):
1845 - Check for failures of tor_inet_ntop() and tor_inet_ntoa()
1846 functions in DNS and IP address processing code, and adjust
1847 codepaths to make them less likely to crash entire Tor instances.
1848 Resolves issue 33788.
1850 o Minor features (compilation size):
1851 - Most server-side DNS code is now disabled when building without
1852 support for relay mode. Closes ticket 33366.
1854 o Minor features (continuous integration):
1855 - Run unit-test and integration test (Stem, Chutney) jobs with
1856 ALL_BUGS_ARE_FATAL macro being enabled on Travis and Appveyor.
1857 Resolves ticket 32143.
1859 o Minor features (control port):
1860 - Return a descriptive error message from the 'GETINFO status/fresh-
1861 relay-descs' command on the control port. Previously, we returned
1862 a generic error of "Error generating descriptor". Closes ticket
1863 32873. Patch by Neel Chauhan.
1865 o Minor features (developer tooling):
1866 - Refrain from listing all .a files that are generated by the Tor
1867 build in .gitignore. Add a single wildcard *.a entry that covers
1868 all of them for present and future. Closes ticket 33642.
1869 - Add a script ("git-install-tools.sh") to install git hooks and
1870 helper scripts. Closes ticket 33451.
1872 o Minor features (directory authority, shared random):
1873 - Refactor more authority-only parts of the shared-random scheduling
1874 code to reside in the dirauth module, and to be disabled when
1875 compiling with --disable-module-dirauth. Closes ticket 33436.
1877 o Minor features (directory):
1878 - Remember the number of bytes we have downloaded for each directory
1879 purpose while bootstrapping, and while fully bootstrapped. Log
1880 this information as part of the heartbeat message. Closes
1883 o Minor features (IPv6 support):
1884 - Adds IPv6 support to tor_addr_is_valid(). Adds tests for the above
1885 changes and tor_addr_is_null(). Closes ticket 33679. Patch
1887 - Allow clients and relays to send dual-stack and IPv6-only EXTEND2
1888 cells. Parse dual-stack and IPv6-only EXTEND2 cells on relays.
1889 Closes ticket 33901.
1891 o Minor features (logging):
1892 - When trying to find our own address, add debug-level logging to
1893 report the sources of candidate addresses. Closes ticket 32888.
1895 o Minor features (testing, architecture):
1896 - Our test scripts now double-check that subsystem initialization
1897 order is consistent with the inter-module dependencies established
1898 by our .may_include files. Implements ticket 31634.
1899 - Initialize all subsystems at the beginning of our unit test
1900 harness, to avoid crashes due to uninitialized subsystems. Follow-
1901 up from ticket 33316.
1903 o Minor features (v3 onion services):
1904 - Add v3 onion service status to the dumpstats() call which is
1905 triggered by a SIGUSR1 signal. Previously, we only did v2 onion
1906 services. Closes ticket 24844. Patch by Neel Chauhan.
1908 o Minor features (windows):
1909 - Add support for console control signals like Ctrl+C in Windows.
1910 Closes ticket 34211. Patch from Damon Harris (TheDcoder).
1912 o Minor bugfix (onion service v3):
1913 - Prevent an assert() that would occur when cleaning the client
1914 descriptor cache, and attempting to close circuits for a non-
1915 decrypted descriptor (lacking client authorization). Fixes bug
1916 33458; bugfix on 0.4.2.1-alpha.
1918 o Minor bugfix (refactoring):
1919 - Lift circuit_build_times_disabled() out of the
1920 circuit_expire_building() loop, to save CPU time when there are
1921 many circuits open. Fixes bug 33977; bugfix on 0.3.5.9.
1923 o Minor bugfixes (client performance):
1924 - Resume use of preemptively-built circuits when UseEntryGuards is set
1925 to 0. We accidentally disabled this feature with that config
1926 setting, leading to slower load times. Fixes bug 34303; bugfix
1929 o Minor bugfixes (directory authorities):
1930 - Directory authorities now reject votes that arrive too late. In
1931 particular, once an authority has started fetching missing votes,
1932 it no longer accepts new votes posted by other authorities. This
1933 change helps prevent a consensus split, where only some authorities
1934 have the late vote. Fixes bug 4631; bugfix on 0.2.0.5-alpha.
1936 o Minor bugfixes (git scripts):
1937 - Stop executing the checked-out pre-commit hook from the pre-push
1938 hook. Instead, execute the copy in the user's git directory. Fixes
1939 bug 33284; bugfix on 0.4.1.1-alpha.
1941 o Minor bugfixes (initialization):
1942 - Initialize the subsystems in our code in an order more closely
1943 corresponding to their dependencies, so that every system is
1944 initialized before the ones that (theoretically) depend on it.
1945 Fixes bug 33316; bugfix on 0.4.0.1-alpha.
1947 o Minor bugfixes (IPv4, relay):
1948 - Check for invalid zero IPv4 addresses and ports when sending and
1949 receiving extend cells. Fixes bug 33900; bugfix on 0.2.4.8-alpha.
1951 o Minor bugfixes (IPv6, relay):
1952 - Consider IPv6 addresses when checking if a connection is
1953 canonical. In 17604, relays assumed that a remote relay could
1954 consider an IPv6 connection canonical, but did not set the
1955 canonical flag on their side of the connection. Fixes bug 33899;
1956 bugfix on 0.3.1.1-alpha.
1957 - Log IPv6 addresses on connections where this relay is the
1958 responder. Previously, responding relays would replace the remote
1959 IPv6 address with the IPv4 address from the consensus. Fixes bug
1960 33899; bugfix on 0.3.1.1-alpha.
1962 o Minor bugfixes (linux seccomp sandbox nss):
1963 - Fix a startup crash when tor is compiled with --enable-nss and
1964 sandbox support is enabled. Fixes bug 34130; bugfix on
1965 0.3.5.1-alpha. Patch by Daniel Pinto.
1967 o Minor bugfixes (logging, testing):
1968 - Make all of tor's assertion macros support the ALL_BUGS_ARE_FATAL
1969 and DISABLE_ASSERTS_IN_UNIT_TESTS debugging modes. (IF_BUG_ONCE()
1970 used to log a non-fatal warning, regardless of the debugging
1971 mode.) Fixes bug 33917; bugfix on 0.2.9.1-alpha.
1973 o Minor bugfixes (logs):
1974 - Remove surprising empty line in the INFO-level log about circuit
1975 build timeout. Fixes bug 33531; bugfix on 0.3.3.1-alpha.
1977 o Minor bugfixes (mainloop):
1978 - Better guard against growing a buffer past its maximum 2GB in
1979 size. Fixes bug 33131; bugfix on 0.3.0.4-rc.
1981 o Minor bugfixes (manual page):
1982 - Update the man page to reflect that MinUptimeHidServDirectoryV2
1983 defaults to 96 hours. Fixes bug 34299; bugfix on 0.2.6.3-alpha.
1985 o Minor bugfixes (onion service v3, client):
1986 - Remove a BUG() that was causing a stacktrace when a descriptor
1987 changed at an unexpected time. Fixes bug 28992; bugfix
1990 o Minor bugfixes (onion service, logging):
1991 - Fix a typo in a log message PublishHidServDescriptors is set to 0.
1992 Fixes bug 33779; bugfix on 0.3.2.1-alpha.
1994 o Minor bugfixes (portability):
1995 - Fix a portability error in the configure script, where we were
1996 using "==" instead of "=". Fixes bug 34233; bugfix on 0.4.3.5.
1998 o Minor bugfixes (protocol versions):
1999 - Sort tor's supported protocol version lists, as recommended by the
2000 tor directory specification. Fixes bug 33285; bugfix
2003 o Minor bugfixes (relays):
2004 - Stop advertising incorrect IPv6 ORPorts in relay and bridge
2005 descriptors, when the IPv6 port was configured as "auto". Fixes
2006 bug 32588; bugfix on 0.2.3.9-alpha.
2008 o Code simplification and refactoring:
2009 - Define and use a new constant TOR_ADDRPORT_BUF_LEN which is like
2010 TOR_ADDR_BUF_LEN but includes enough space for an IP address,
2011 brackets, separating colon, and port number. Closes ticket 33956.
2012 Patch by Neel Chauhan.
2013 - Merge the orconn and ocirc events into the "core" subsystem, which
2014 manages or connections and origin circuits. Previously they were
2015 isolated in subsystems of their own.
2016 - Move LOG_PROTOCOL_WARN to app/config. Resolves a dependency
2017 inversion. Closes ticket 33633.
2018 - Move the circuit extend code to the relay module. Split the
2019 circuit extend function into smaller functions. Closes
2021 - Rewrite port_parse_config() to use the default port flags from
2022 port_cfg_new(). Closes ticket 32994. Patch by MrSquanchee.
2023 - Updated comments in 'scheduler.c' to reflect old code changes, and
2024 simplified the scheduler channel state change code. Closes
2028 - Document the limitations of using %include on config files with
2029 seccomp sandbox enabled. Fixes documentation bug 34133; bugfix on
2030 0.3.1.1-alpha. Patch by Daniel Pinto.
2031 - Fix several doxygen warnings related to imbalanced groups. Closes
2035 - Remove the ClientAutoIPv6ORPort option. This option attempted to
2036 randomly choose between IPv4 and IPv6 for client connections, and
2037 wasn't a true implementation of Happy Eyeballs. Often, this option
2038 failed on IPv4-only or IPv6-only connections. Closes ticket 32905.
2039 Patch by Neel Chauhan.
2040 - Stop shipping contrib/dist/rc.subr file, as it is not being used
2041 on FreeBSD anymore. Closes issue 31576.
2044 - Add a basic IPv6 test to "make test-network". This test only runs
2045 when the local machine has an IPv6 stack. Closes ticket 33300.
2046 - Add test-network-ipv4 and test-network-ipv6 jobs to the Makefile.
2047 These jobs run the IPv4-only and dual-stack chutney flavours from
2048 test-network-all. Closes ticket 33280.
2049 - Remove a redundant distcheck job. Closes ticket 33194.
2050 - Run the test-network-ipv6 Makefile target in the Travis CI IPv6
2051 chutney job. This job runs on macOS, so it's a bit slow. Closes
2053 - Sort the Travis jobs in order of speed. Putting the slowest jobs
2054 first takes full advantage of Travis job concurrency. Closes
2056 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
2057 previously configured to fast_finish (which requires
2058 allow_failure), to speed up the build. Closes ticket 33195.
2059 - Test v3 onion services to tor's mixed IPv4 chutney network. And
2060 add a mixed IPv6 chutney network. These networks are used in the
2061 test-network-all, test-network-ipv4, and test-network-ipv6 make
2062 targets. Closes ticket 33334.
2063 - Use the "bridges+hs-v23" chutney network flavour in "make test-
2064 network". This test requires a recent version of chutney (mid-
2065 February 2020). Closes ticket 28208.
2066 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
2067 tool to produce detailed diagnostic output. Closes ticket 32792.
2069 o Code simplification and refactoring (onion service):
2070 - Refactor configuration parsing to use the new config subsystem
2071 code. Closes ticket 33014.
2073 o Code simplification and refactoring (relay address):
2074 - Move a series of functions related to address resolving into their
2075 own files. Closes ticket 33789.
2077 o Documentation (manual page):
2078 - Add cross reference links and a table of contents to the HTML tor
2079 manual page. Closes ticket 33369. Work by Swati Thacker as part of
2080 Google Season of Docs.
2081 - Alphabetize the Denial of Service Mitigation Options, Directory
2082 Authority Server Options, Hidden Service Options, and Testing
2083 Network Options sections of the tor(1) manual page. Closes ticket
2084 33275. Work by Swati Thacker as part of Google Season of Docs.
2085 - Refrain from mentioning nicknames in manpage section for MyFamily
2086 torrc option. Resolves issue 33417.
2087 - Updated the options set by TestingTorNetwork in the manual page.
2088 Closes ticket 33778.
2091 Changes in version 0.4.3.5 - 2020-05-15
2092 Tor 0.4.3.5 is the first stable release in the 0.4.3.x series. This
2093 series adds support for building without relay code enabled, and
2094 implements functionality needed for OnionBalance with v3 onion
2095 services. It includes significant refactoring of our configuration and
2096 controller functionality, and fixes numerous smaller bugs and
2099 Per our support policy, we support each stable release series for nine
2100 months after its first stable release, or three months after the first
2101 stable release of the next series: whichever is longer. This means
2102 that 0.4.3.x will be supported until around February 2021--later, if
2103 0.4.4.x is later than anticipated.
2105 Note also that support for 0.4.1.x is about to end on May 20 of this
2106 year; 0.4.2.x will be supported until September 15. We still plan to
2107 continue supporting 0.3.5.x, our long-term stable series, until
2110 Below are the changes since 0.4.3.4-rc. For a complete list of changes
2111 since 0.4.2.6, see the ReleaseNotes file.
2113 o Minor bugfixes (compiler compatibility):
2114 - Avoid compiler warnings from Clang 10 related to the use of GCC-
2115 style "/* falls through */" comments. Both Clang and GCC allow
2116 __attribute__((fallthrough)) instead, so that's what we're using
2117 now. Fixes bug 34078; bugfix on 0.3.1.3-alpha.
2118 - Fix compilation warnings with GCC 10.0.1. Fixes bug 34077; bugfix
2121 o Minor bugfixes (logging):
2122 - Stop truncating IPv6 addresses and ports in channel and connection
2123 logs. Fixes bug 33918; bugfix on 0.2.4.4-alpha.
2124 - Fix a logic error in a log message about whether an address was
2125 invalid. Previously, the code would never report that onion
2126 addresses were onion addresses. Fixes bug 34131; bugfix
2130 Changes in version 0.4.3.4-rc - 2020-04-13
2131 Tor 0.4.3.4-rc is the first release candidate in its series. It fixes
2132 several bugs from earlier versions, including one affecting DoS
2133 defenses on bridges using pluggable transports.
2135 o Major bugfixes (DoS defenses, bridges, pluggable transport):
2136 - Fix a bug that was preventing DoS defenses from running on bridges
2137 with a pluggable transport. Previously, the DoS subsystem was not
2138 given the transport name of the client connection, thus failed to
2139 find the GeoIP cache entry for that client address. Fixes bug
2140 33491; bugfix on 0.3.3.2-alpha.
2142 o Minor feature (sendme, flow control):
2143 - Default to sending SENDME version 1 cells. (Clients are already
2144 sending these, because of a consensus parameter telling them to do
2145 so: this change only affects what clients would do if the
2146 consensus didn't contain a recommendation.) Closes ticket 33623.
2148 o Minor features (testing):
2149 - The unit tests now support a "TOR_SKIP_TESTCASES" environment
2150 variable to specify a list of space-separated test cases that
2151 should not be executed. We will use this to disable certain tests
2152 that are failing on Appveyor because of mismatched OpenSSL
2153 libraries. Part of ticket 33643.
2155 o Minor bugfixes (--disable-module-relay):
2156 - Fix an assertion failure when Tor is built without the relay
2157 module, and then invoked with the "User" option. Fixes bug 33668;
2158 bugfix on 0.4.3.1-alpha.
2160 o Minor bugfixes (--disable-module-relay,--disable-module-dirauth):
2161 - Set some output arguments in the relay and dirauth module stubs,
2162 to guard against future stub argument handling bugs like 33668.
2163 Fixes bug 33674; bugfix on 0.4.3.1-alpha.
2165 o Minor bugfixes (build system):
2166 - Correctly output the enabled module in the configure summary.
2167 Before that, the list shown was just plain wrong. Fixes bug 33646;
2168 bugfix on 0.4.3.2-alpha.
2170 o Minor bugfixes (client, IPv6):
2171 - Stop forcing all non-SocksPorts to prefer IPv6 exit connections.
2172 Instead, prefer IPv6 connections by default, but allow users to
2173 change their configs using the "NoPreferIPv6" port flag. Fixes bug
2174 33608; bugfix on 0.4.3.1-alpha.
2175 - Revert PreferIPv6 set by default on the SocksPort because it broke
2176 the torsocks use case. Tor doesn't have a way for an application
2177 to request the hostname to be resolved for a specific IP version,
2178 but torsocks requires that. Up until now, IPv4 was used by default
2179 so torsocks is expecting that, and can't handle a possible IPv6
2180 being returned. Fixes bug 33804; bugfix on 0.4.3.1-alpha.
2182 o Minor bugfixes (key portability):
2183 - When reading PEM-encoded key data, tolerate CRLF line-endings even
2184 if we are not running on Windows. Previously, non-Windows hosts
2185 would reject these line-endings in certain positions, making
2186 certain key files hard to move from one host to another. Fixes bug
2187 33032; bugfix on 0.3.5.1-alpha.
2189 o Minor bugfixes (logging):
2190 - Flush stderr, stdout, and file logs during shutdown, if supported
2191 by the OS. This change helps make sure that any final logs are
2192 recorded. Fixes bug 33087; bugfix on 0.4.1.6.
2193 - Stop closing stderr and stdout during shutdown. Closing these file
2194 descriptors can hide sanitiser logs. Fixes bug 33087; bugfix
2197 o Minor bugfixes (onion services v3):
2198 - Relax severity of a log message that can appear naturally when
2199 decoding onion service descriptors as a relay. Also add some
2200 diagnostics to debug any future bugs in that area. Fixes bug
2201 31669; bugfix on 0.3.0.1-alpha.
2202 - Block a client-side assertion by disallowing the registration of
2203 an x25519 client auth key that's all zeroes. Fixes bug 33545;
2204 bugfix on 0.4.3.1-alpha. Based on patch from "cypherpunks".
2206 o Code simplification and refactoring:
2207 - Disable our coding standards best practices tracker in our git
2208 hooks. (0.4.3 branches only.) Closes ticket 33678.
2211 - Avoid conflicts between the fake sockets in tor's unit tests, and
2212 real file descriptors. Resolves issues running unit tests with
2213 GitHub Actions, where the process that embeds or launches the
2214 tests has already opened a large number of file descriptors. Fixes
2215 bug 33782; bugfix on 0.2.8.1-alpha. Found and fixed by
2219 - In our Appveyor Windows CI, copy required DLLs to test and app
2220 directories, before running tor's tests. This ensures that tor.exe
2221 and test*.exe use the correct version of each DLL. This fix is not
2222 required, but we hope it will avoid DLL search issues in future.
2223 Fixes bug 33673; bugfix on 0.3.4.2-alpha.
2224 - On Appveyor, skip the crypto/openssl_version test, which is
2225 failing because of a mismatched library installation. Fix
2229 Changes in version 0.4.3.3-alpha - 2020-03-18
2230 Tor 0.4.3.3-alpha fixes several bugs in previous releases, including
2231 TROVE-2020-002, a major denial-of-service vulnerability that affected
2232 all released Tor instances since 0.2.1.5-alpha. Using this
2233 vulnerability, an attacker could cause Tor instances to consume a huge
2234 amount of CPU, disrupting their operations for several seconds or
2235 minutes. This attack could be launched by anybody against a relay, or
2236 by a directory cache against any client that had connected to it. The
2237 attacker could launch this attack as much as they wanted, thereby
2238 disrupting service or creating patterns that could aid in traffic
2239 analysis. This issue was found by OSS-Fuzz, and is also tracked
2242 We do not have reason to believe that this attack is currently being
2243 exploited in the wild, but nonetheless we advise everyone to upgrade
2244 as soon as packages are available.
2246 o Major bugfixes (security, denial-of-service):
2247 - Fix a denial-of-service bug that could be used by anyone to
2248 consume a bunch of CPU on any Tor relay or authority, or by
2249 directories to consume a bunch of CPU on clients or hidden
2250 services. Because of the potential for CPU consumption to
2251 introduce observable timing patterns, we are treating this as a
2252 high-severity security issue. Fixes bug 33119; bugfix on
2253 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
2254 as TROVE-2020-002 and CVE-2020-10592.
2256 o Major bugfixes (circuit padding, memory leak):
2257 - Avoid a remotely triggered memory leak in the case that a circuit
2258 padding machine is somehow negotiated twice on the same circuit.
2259 Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls.
2260 This is also tracked as TROVE-2020-004 and CVE-2020-10593.
2262 o Major bugfixes (directory authority):
2263 - Directory authorities will now send a 503 (not enough bandwidth)
2264 code to clients when under bandwidth pressure. Known relays and
2265 other authorities will always be answered regardless of the
2266 bandwidth situation. Fixes bug 33029; bugfix on 0.1.2.5-alpha.
2268 o Minor features (diagnostic):
2269 - Improve assertions and add some memory-poisoning code to try to
2270 track down possible causes of a rare crash (32564) in the EWMA
2271 code. Closes ticket 33290.
2273 o Minor features (directory authorities):
2274 - Directory authorities now reject descriptors from relays running
2275 Tor versions from the 0.2.9 and 0.4.0 series. The 0.3.5 series is
2276 still allowed. Resolves ticket 32672. Patch by Neel Chauhan.
2278 o Minor features (usability):
2279 - Include more information when failing to parse a configuration
2280 value. This should make it easier to tell what's going wrong when
2281 a configuration file doesn't parse. Closes ticket 33460.
2283 o Minor bugfix (relay, configuration):
2284 - Warn if the ContactInfo field is not set, and tell the relay
2285 operator that not having a ContactInfo field set might cause their
2286 relay to get rejected in the future. Fixes bug 33361; bugfix
2289 o Minor bugfixes (coding best practices checks):
2290 - Allow the "practracker" script to read unicode files when using
2291 Python 2. We made the script use unicode literals in 0.4.3.1-alpha,
2292 but didn't change the codec for opening files. Fixes bug 33374;
2293 bugfix on 0.4.3.1-alpha.
2295 o Minor bugfixes (continuous integration):
2296 - Remove the buggy and unused mirroring job. Fixes bug 33213; bugfix
2299 o Minor bugfixes (onion service v3, client):
2300 - Remove a BUG() warning that would cause a stack trace if an onion
2301 service descriptor was freed while we were waiting for a
2302 rendezvous circuit to complete. Fixes bug 28992; bugfix
2305 o Minor bugfixes (onion services v3):
2306 - Fix an assertion failure that could result from a corrupted
2307 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
2308 bugfix on 0.3.3.1-alpha. This issue is also tracked
2311 o Documentation (manpage):
2312 - Alphabetize the Server and Directory server sections of the tor
2313 manpage. Also split Statistics options into their own section of
2314 the manpage. Closes ticket 33188. Work by Swati Thacker as part of
2315 Google Season of Docs.
2316 - Document the __OwningControllerProcess torrc option and specify
2317 its polling interval. Resolves issue 32971.
2319 o Testing (Travis CI):
2320 - Remove a redundant distcheck job. Closes ticket 33194.
2321 - Sort the Travis jobs in order of speed: putting the slowest jobs
2322 first takes full advantage of Travis job concurrency. Closes
2324 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
2325 previously configured to fast_finish (which requires
2326 allow_failure), to speed up the build. Closes ticket 33195.
2327 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
2328 tool to produce detailed diagnostic output. Closes ticket 32792.
2331 Changes in version 0.4.2.7 - 2020-03-18
2332 This is the third stable release in the 0.4.2.x series. It backports
2333 numerous fixes from later releases, including a fix for TROVE-2020-
2334 002, a major denial-of-service vulnerability that affected all
2335 released Tor instances since 0.2.1.5-alpha. Using this vulnerability,
2336 an attacker could cause Tor instances to consume a huge amount of CPU,
2337 disrupting their operations for several seconds or minutes. This
2338 attack could be launched by anybody against a relay, or by a directory
2339 cache against any client that had connected to it. The attacker could
2340 launch this attack as much as they wanted, thereby disrupting service
2341 or creating patterns that could aid in traffic analysis. This issue
2342 was found by OSS-Fuzz, and is also tracked as CVE-2020-10592.
2344 We do not have reason to believe that this attack is currently being
2345 exploited in the wild, but nonetheless we advise everyone to upgrade
2346 as soon as packages are available.
2348 o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha):
2349 - Fix a denial-of-service bug that could be used by anyone to
2350 consume a bunch of CPU on any Tor relay or authority, or by
2351 directories to consume a bunch of CPU on clients or hidden
2352 services. Because of the potential for CPU consumption to
2353 introduce observable timing patterns, we are treating this as a
2354 high-severity security issue. Fixes bug 33119; bugfix on
2355 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
2356 as TROVE-2020-002 and CVE-2020-10592.
2358 o Major bugfixes (circuit padding, memory leak, backport from 0.4.3.3-alpha):
2359 - Avoid a remotely triggered memory leak in the case that a circuit
2360 padding machine is somehow negotiated twice on the same circuit.
2361 Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls.
2362 This is also tracked as TROVE-2020-004 and CVE-2020-10593.
2364 o Major bugfixes (directory authority, backport from 0.4.3.3-alpha):
2365 - Directory authorities will now send a 503 (not enough bandwidth)
2366 code to clients when under bandwidth pressure. Known relays and
2367 other authorities will always be answered regardless of the
2368 bandwidth situation. Fixes bug 33029; bugfix on 0.1.2.5-alpha.
2370 o Minor features (continuous integration, backport from 0.4.3.2-alpha):
2371 - Stop allowing failures on the Travis CI stem tests job. It looks
2372 like all the stem hangs we were seeing before are now fixed.
2373 Closes ticket 33075.
2375 o Minor bugfixes (bridges, backport from 0.4.3.1-alpha):
2376 - Lowercase the configured value of BridgeDistribution before adding
2377 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
2379 o Minor bugfixes (logging, backport from 0.4.3.2-alpha):
2380 - If we encounter a bug when flushing a buffer to a TLS connection,
2381 only log the bug once per invocation of the Tor process.
2382 Previously we would log with every occurrence, which could cause
2383 us to run out of disk space. Fixes bug 33093; bugfix
2386 o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha):
2387 - Fix an assertion failure that could result from a corrupted
2388 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
2389 bugfix on 0.3.3.1-alpha. This issue is also tracked
2392 o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha):
2393 - Fix a syntax warning given by newer versions of Rust that was
2394 creating problems for our continuous integration. Fixes bug 33212;
2395 bugfix on 0.3.5.1-alpha.
2397 o Testing (Travis CI, backport from 0.4.3.3-alpha):
2398 - Remove a redundant distcheck job. Closes ticket 33194.
2399 - Sort the Travis jobs in order of speed: putting the slowest jobs
2400 first takes full advantage of Travis job concurrency. Closes
2402 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
2403 previously configured to fast_finish (which requires
2404 allow_failure), to speed up the build. Closes ticket 33195.
2405 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
2406 tool to produce detailed diagnostic output. Closes ticket 32792.
2409 Changes in version 0.4.1.9 - 2020-03-18
2410 Tor 0.4.1.9 backports important fixes from later Tor releases,
2411 including a fix for TROVE-2020-002, a major denial-of-service
2412 vulnerability that affected all released Tor instances since
2413 0.2.1.5-alpha. Using this vulnerability, an attacker could cause Tor
2414 instances to consume a huge amount of CPU, disrupting their operations
2415 for several seconds or minutes. This attack could be launched by
2416 anybody against a relay, or by a directory cache against any client
2417 that had connected to it. The attacker could launch this attack as
2418 much as they wanted, thereby disrupting service or creating patterns
2419 that could aid in traffic analysis. This issue was found by OSS-Fuzz,
2420 and is also tracked as CVE-2020-10592.
2422 We do not have reason to believe that this attack is currently being
2423 exploited in the wild, but nonetheless we advise everyone to upgrade
2424 as soon as packages are available.
2426 o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha):
2427 - Fix a denial-of-service bug that could be used by anyone to
2428 consume a bunch of CPU on any Tor relay or authority, or by
2429 directories to consume a bunch of CPU on clients or hidden
2430 services. Because of the potential for CPU consumption to
2431 introduce observable timing patterns, we are treating this as a
2432 high-severity security issue. Fixes bug 33119; bugfix on
2433 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
2434 as TROVE-2020-002 and CVE-2020-10592.
2436 o Major bugfixes (circuit padding, memory leak, backport from 0.4.3.3-alpha):
2437 - Avoid a remotely triggered memory leak in the case that a circuit
2438 padding machine is somehow negotiated twice on the same circuit.
2439 Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls.
2440 This is also tracked as TROVE-2020-004 and CVE-2020-10593.
2442 o Minor bugfixes (bridges, backport from 0.4.3.1-alpha):
2443 - Lowercase the configured value of BridgeDistribution before adding
2444 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
2446 o Minor bugfixes (logging, backport from 0.4.3.2-alpha):
2447 - If we encounter a bug when flushing a buffer to a TLS connection,
2448 only log the bug once per invocation of the Tor process.
2449 Previously we would log with every occurrence, which could cause
2450 us to run out of disk space. Fixes bug 33093; bugfix
2453 o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha):
2454 - Fix an assertion failure that could result from a corrupted
2455 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
2456 bugfix on 0.3.3.1-alpha. This issue is also tracked
2459 o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha):
2460 - Fix a syntax warning given by newer versions of Rust that was
2461 creating problems for our continuous integration. Fixes bug 33212;
2462 bugfix on 0.3.5.1-alpha.
2464 o Testing (Travis CI, backport from 0.4.3.3-alpha):
2465 - Remove a redundant distcheck job. Closes ticket 33194.
2466 - Sort the Travis jobs in order of speed: putting the slowest jobs
2467 first takes full advantage of Travis job concurrency. Closes
2469 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
2470 previously configured to fast_finish (which requires
2471 allow_failure), to speed up the build. Closes ticket 33195.
2472 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
2473 tool to produce detailed diagnostic output. Closes ticket 32792.
2476 Changes in version 0.3.5.10 - 2020-03-18
2477 Tor 0.3.5.10 backports many fixes from later Tor releases, including a
2478 fix for TROVE-2020-002, a major denial-of-service vulnerability that
2479 affected all released Tor instances since 0.2.1.5-alpha. Using this
2480 vulnerability, an attacker could cause Tor instances to consume a huge
2481 amount of CPU, disrupting their operations for several seconds or
2482 minutes. This attack could be launched by anybody against a relay, or
2483 by a directory cache against any client that had connected to it. The
2484 attacker could launch this attack as much as they wanted, thereby
2485 disrupting service or creating patterns that could aid in traffic
2486 analysis. This issue was found by OSS-Fuzz, and is also tracked
2489 We do not have reason to believe that this attack is currently being
2490 exploited in the wild, but nonetheless we advise everyone to upgrade
2491 as soon as packages are available.
2493 o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha):
2494 - Fix a denial-of-service bug that could be used by anyone to
2495 consume a bunch of CPU on any Tor relay or authority, or by
2496 directories to consume a bunch of CPU on clients or hidden
2497 services. Because of the potential for CPU consumption to
2498 introduce observable timing patterns, we are treating this as a
2499 high-severity security issue. Fixes bug 33119; bugfix on
2500 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
2501 as TROVE-2020-002 and CVE-2020-10592.
2503 o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha):
2504 - Correct how we use libseccomp. Particularly, stop assuming that
2505 rules are applied in a particular order or that more rules are
2506 processed after the first match. Neither is the case! In
2507 libseccomp <2.4.0 this lead to some rules having no effect.
2508 libseccomp 2.4.0 changed how rules are generated, leading to a
2509 different ordering, which in turn led to a fatal crash during
2510 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
2513 o Minor features (continuous integration, backport from 0.4.3.2-alpha):
2514 - Stop allowing failures on the Travis CI stem tests job. It looks
2515 like all the stem hangs we were seeing before are now fixed.
2516 Closes ticket 33075.
2518 o Minor bugfixes (bridges, backport from 0.4.3.1-alpha):
2519 - Lowercase the configured value of BridgeDistribution before adding
2520 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
2522 o Minor bugfixes (crash, backport from 0.4.2.4-rc):
2523 - When running Tor with an option like --verify-config or
2524 --dump-config that does not start the event loop, avoid crashing
2525 if we try to exit early because of an error. Fixes bug 32407;
2526 bugfix on 0.3.3.1-alpha.
2528 o Minor bugfixes (logging, backport from 0.4.3.2-alpha):
2529 - If we encounter a bug when flushing a buffer to a TLS connection,
2530 only log the bug once per invocation of the Tor process.
2531 Previously we would log with every occurrence, which could cause
2532 us to run out of disk space. Fixes bug 33093; bugfix
2535 o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha):
2536 - Fix an assertion failure that could result from a corrupted
2537 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
2538 bugfix on 0.3.3.1-alpha. This issue is also tracked
2541 o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha):
2542 - Fix a syntax warning given by newer versions of Rust that was
2543 creating problems for our continuous integration. Fixes bug 33212;
2544 bugfix on 0.3.5.1-alpha.
2546 o Testing (backport from 0.4.3.1-alpha):
2547 - Re-enable the Travis CI macOS Chutney build, but don't let it
2548 prevent the Travis job from finishing. (The Travis macOS jobs are
2549 slow, so we don't want to have it delay the whole CI process.)
2550 Closes ticket 32629.
2551 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
2552 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
2553 fix the sandbox errors in 32722. Closes ticket 32240.
2555 o Testing (continuous integration, backport from 0.4.3.1-alpha):
2556 - Use zstd in our Travis Linux builds. Closes ticket 32242.
2558 o Testing (Travis CI, backport from 0.4.3.3-alpha):
2559 - Remove a redundant distcheck job. Closes ticket 33194.
2560 - Sort the Travis jobs in order of speed: putting the slowest jobs
2561 first takes full advantage of Travis job concurrency. Closes
2563 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
2564 previously configured to fast_finish (which requires
2565 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
2566 tool to produce detailed diagnostic output. Closes ticket 32792.
2569 Changes in version 0.4.3.2-alpha - 2020-02-10
2570 This is the second stable alpha release in the Tor 0.4.3.x series. It
2571 fixes several bugs present in the previous alpha release. Anybody
2572 running the previous alpha should upgrade, and look for bugs in this
2575 o Major bugfixes (onion service client, authorization):
2576 - On a NEWNYM signal, purge entries from the ephemeral client
2577 authorization cache. The permanent ones are kept. Fixes bug 33139;
2578 bugfix on 0.4.3.1-alpha.
2580 o Minor features (best practices tracker):
2581 - Practracker now supports a --regen-overbroad option to regenerate
2582 the exceptions file, but only to revise exceptions to be _less_
2583 tolerant of best-practices violations. Closes ticket 32372.
2585 o Minor features (continuous integration):
2586 - Run Doxygen Makefile target on Travis, so we can learn about
2587 regressions in our internal documentation. Closes ticket 32455.
2588 - Stop allowing failures on the Travis CI stem tests job. It looks
2589 like all the stem hangs we were seeing before are now fixed.
2590 Closes ticket 33075.
2592 o Minor bugfixes (build system):
2593 - Revise configure options that were either missing or incorrect in
2594 the configure summary. Fixes bug 32230; bugfix on 0.4.3.1-alpha.
2596 o Minor bugfixes (controller protocol):
2597 - Fix a memory leak introduced by refactoring of control reply
2598 formatting code. Fixes bug 33039; bugfix on 0.4.3.1-alpha.
2599 - Fix a memory leak in GETINFO responses. Fixes bug 33103; bugfix
2601 - When receiving "ACTIVE" or "DORMANT" signals on the control port,
2602 report them as SIGNAL events. Previously we would log a bug
2603 warning. Fixes bug 33104; bugfix on 0.4.0.1-alpha.
2605 o Minor bugfixes (logging):
2606 - If we encounter a bug when flushing a buffer to a TLS connection,
2607 only log the bug once per invocation of the Tor process.
2608 Previously we would log with every occurrence, which could cause
2609 us to run out of disk space. Fixes bug 33093; bugfix
2611 - When logging a bug, do not say "Future instances of this warning
2612 will be silenced" unless we are actually going to silence them.
2613 Previously we would say this whenever a BUG() check failed in the
2614 code. Fixes bug 33095; bugfix on 0.4.1.1-alpha.
2616 o Minor bugfixes (onion service v2):
2617 - Move a series of v2 onion service warnings to protocol-warning
2618 level because they can all be triggered remotely by a malformed
2619 request. Fixes bug 32706; bugfix on 0.1.1.14-alpha.
2621 o Minor bugfixes (onion service v3, client authorization):
2622 - When removing client authorization credentials using the control
2623 port, also remove the associated descriptor, so the onion service
2624 can no longer be contacted. Fixes bug 33148; bugfix
2627 o Minor bugfixes (pluggable transports):
2628 - When receiving a message on standard error from a pluggable
2629 transport, log it at info level, rather than as a warning. Fixes
2630 bug 33005; bugfix on 0.4.0.1-alpha.
2632 o Minor bugfixes (rust, build):
2633 - Fix a syntax warning given by newer versions of Rust that was
2634 creating problems for our continuous integration. Fixes bug 33212;
2635 bugfix on 0.3.5.1-alpha.
2637 o Minor bugfixes (TLS bug handling):
2638 - When encountering a bug in buf_read_from_tls(), return a "MISC"
2639 error code rather than "WANTWRITE". This change might help avoid
2640 some CPU-wasting loops if the bug is ever triggered. Bug reported
2641 by opara. Fixes bug 32673; bugfix on 0.3.0.4-alpha.
2643 o Code simplification and refactoring (mainloop):
2644 - Simplify the ip_address_changed() function by removing redundant
2645 checks. Closes ticket 33091.
2647 o Documentation (manpage):
2648 - Split "Circuit Timeout" options and "Node Selection" options into
2649 their own sections of the tor manpage. Closes tickets 32928 and
2650 32929. Work by Swati Thacker as part of Google Season of Docs.
2653 Changes in version 0.4.2.6 - 2020-01-30
2654 This is the second stable release in the 0.4.2.x series. It backports
2655 several bugfixes from 0.4.3.1-alpha, including some that had affected
2656 the Linux seccomp2 sandbox or Windows services. If you're running with
2657 one of those configurations, you'll probably want to upgrade;
2658 otherwise, you should be fine with 0.4.2.5.
2660 o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha):
2661 - Correct how we use libseccomp. Particularly, stop assuming that
2662 rules are applied in a particular order or that more rules are
2663 processed after the first match. Neither is the case! In
2664 libseccomp <2.4.0 this led to some rules having no effect.
2665 libseccomp 2.4.0 changed how rules are generated, leading to a
2666 different ordering, which in turn led to a fatal crash during
2667 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
2669 - Fix crash when reloading logging configuration while the
2670 experimental sandbox is enabled. Fixes bug 32841; bugfix on
2671 0.4.1.7. Patch by Peter Gerber.
2673 o Minor bugfixes (correctness checks, backport from 0.4.3.1-alpha):
2674 - Use GCC/Clang's printf-checking feature to make sure that
2675 tor_assertf() arguments are correctly typed. Fixes bug 32765;
2676 bugfix on 0.4.1.1-alpha.
2678 o Minor bugfixes (logging, crash, backport from 0.4.3.1-alpha):
2679 - Avoid a possible crash when trying to log a (fatal) assertion
2680 failure about mismatched magic numbers in configuration objects.
2681 Fixes bug 32771; bugfix on 0.4.2.1-alpha.
2683 o Minor bugfixes (testing, backport from 0.4.3.1-alpha):
2684 - When TOR_DISABLE_PRACTRACKER is set, do not apply it to the
2685 test_practracker.sh script. Doing so caused a test failure. Fixes
2686 bug 32705; bugfix on 0.4.2.1-alpha.
2687 - When TOR_DISABLE_PRACTRACKER is set, log a notice to stderr when
2688 skipping practracker checks. Fixes bug 32705; bugfix
2691 o Minor bugfixes (windows service, backport from 0.4.3.1-alpha):
2692 - Initialize the publish/subscribe system when running as a windows
2693 service. Fixes bug 32778; bugfix on 0.4.1.1-alpha.
2695 o Testing (backport from 0.4.3.1-alpha):
2696 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
2697 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
2698 fix the sandbox errors in 32722. Closes ticket 32240.
2699 - Re-enable the Travis CI macOS Chutney build, but don't let it
2700 prevent the Travis job from finishing. (The Travis macOS jobs are
2701 slow, so we don't want to have it delay the whole CI process.)
2702 Closes ticket 32629.
2704 o Testing (continuous integration, backport from 0.4.3.1-alpha):
2705 - Use zstd in our Travis Linux builds. Closes ticket 32242.
2708 Changes in version 0.4.1.8 - 2020-01-30
2709 This release backports several bugfixes from later release series,
2710 including some that had affected the Linux seccomp2 sandbox or Windows
2711 services. If you're running with one of those configurations, you'll
2712 probably want to upgrade; otherwise, you should be fine with your
2713 current version of 0.4.1.x.
2715 o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha):
2716 - Correct how we use libseccomp. Particularly, stop assuming that
2717 rules are applied in a particular order or that more rules are
2718 processed after the first match. Neither is the case! In
2719 libseccomp <2.4.0 this led to some rules having no effect.
2720 libseccomp 2.4.0 changed how rules are generated, leading to a
2721 different ordering, which in turn led to a fatal crash during
2722 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
2724 - Fix crash when reloading logging configuration while the
2725 experimental sandbox is enabled. Fixes bug 32841; bugfix on
2726 0.4.1.7. Patch by Peter Gerber.
2728 o Minor bugfixes (crash, backport form 0.4.2.4-rc):
2729 - When running Tor with an option like --verify-config or
2730 --dump-config that does not start the event loop, avoid crashing
2731 if we try to exit early because of an error. Fixes bug 32407;
2732 bugfix on 0.3.3.1-alpha.
2734 o Minor bugfixes (windows service, backport from 0.4.3.1-alpha):
2735 - Initialize the publish/subscribe system when running as a windows
2736 service. Fixes bug 32778; bugfix on 0.4.1.1-alpha.
2738 o Testing (backport from 0.4.3.1-alpha):
2739 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
2740 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
2741 fix the sandbox errors in 32722. Closes ticket 32240.
2742 - Re-enable the Travis CI macOS Chutney build, but don't let it
2743 prevent the Travis job from finishing. (The Travis macOS jobs are
2744 slow, so we don't want to have it delay the whole CI process.)
2745 Closes ticket 32629.
2747 o Testing (continuous integration, backport from 0.4.3.1-alpha):
2748 - Use zstd in our Travis Linux builds. Closes ticket 32242.
2751 Changes in version 0.4.3.1-alpha - 2020-01-22
2752 This is the first alpha release in the 0.4.3.x series. It includes
2753 improved support for application integration of onion services, support
2754 for building in a client-only mode, and newly improved internal
2755 documentation (online at https://src-ref.docs.torproject.org/tor/). It
2756 also has numerous other small bugfixes and features, as well as
2757 improvements to our code's internal organization that should help us
2758 write better code in the future.
2760 o New system requirements:
2761 - When building Tor, you now need to have Python 3 in order to run
2762 the integration tests. (Python 2 is officially unsupported
2763 upstream, as of 1 Jan 2020.) Closes ticket 32608.
2765 o Major features (build system):
2766 - The relay code can now be disabled using the --disable-module-relay
2767 configure option. When this option is set, we also disable the
2768 dirauth module. Closes ticket 32123.
2769 - When Tor is compiled --disable-module-relay, we also omit the code
2770 used to act as a directory cache. Closes ticket 32487.
2772 o Major features (directory authority, ed25519):
2773 - Add support for banning a relay's ed25519 keys in the approved-
2774 routers file. This will help us migrate away from RSA keys in the
2775 future. Previously, only RSA keys could be banned in approved-
2776 routers. Resolves ticket 22029. Patch by Neel Chauhan.
2778 o Major features (onion service, controller):
2779 - New control port commands to manage client-side onion service
2780 authorization credentials. The ONION_CLIENT_AUTH_ADD command adds
2781 a credential, ONION_CLIENT_AUTH_REMOVE deletes a credential, and
2782 ONION_CLIENT_AUTH_VIEW lists the credentials. Closes ticket 30381.
2784 o Major features (onion service, SOCKS5):
2785 - Introduce a new SocksPort flag, ExtendedErrors, to support more
2786 detailed error codes in information for applications that support
2787 them. Closes ticket 30382; implements proposal 304.
2789 o Major features (proxy):
2790 - In addition to its current supported proxy types (HTTP CONNECT,
2791 SOCKS4, and SOCKS5), Tor can now make its OR connections through a
2792 HAProxy server. A new torrc option was added to specify the
2793 address/port of the server: TCPProxy <protocol> <host>:<port>.
2794 Currently the only supported protocol for the option is haproxy.
2795 Closes ticket 31518. Patch done by Suphanat Chunhapanya (haxxpop).
2797 o Major bugfixes (linux seccomp sandbox):
2798 - Correct how we use libseccomp. Particularly, stop assuming that
2799 rules are applied in a particular order or that more rules are
2800 processed after the first match. Neither is the case! In
2801 libseccomp <2.4.0 this led to some rules having no effect.
2802 libseccomp 2.4.0 changed how rules are generated, leading to a
2803 different ordering, which in turn led to a fatal crash during
2804 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
2806 - Fix crash when reloading logging configuration while the
2807 experimental sandbox is enabled. Fixes bug 32841; bugfix on
2808 0.4.1.7. Patch by Peter Gerber.
2810 o Major bugfixes (networking):
2811 - Correctly handle IPv6 addresses in SOCKS5 RESOLVE_PTR requests,
2812 and accept strings as well as binary addresses. Fixes bug 32315;
2813 bugfix on 0.3.5.1-alpha.
2815 o Major bugfixes (onion service):
2816 - Report HS circuit failure back into the HS subsystem so we take
2817 appropriate action with regards to the client introduction point
2818 failure cache. This improves reachability of onion services, since
2819 now clients notice failing introduction circuits properly. Fixes
2820 bug 32020; bugfix on 0.3.2.1-alpha.
2822 o Minor feature (configure, build system):
2823 - Output a list of enabled/disabled features at the end of the
2824 configure process in a pleasing way. Closes ticket 31373.
2826 o Minor feature (heartbeat, onion service):
2827 - Add the DoS INTRODUCE2 defenses counter to the heartbeat DoS
2828 message. Closes ticket 31371.
2830 o Minor features (configuration validation):
2831 - Configuration validation can now be done by per-module callbacks,
2832 rather than a global validation function. This will let us reduce
2833 the size of config.c and some of its more cumbersome functions.
2834 Closes ticket 31241.
2836 o Minor features (configuration):
2837 - If a configured hardware crypto accelerator in AccelName is
2838 prefixed with "!", Tor now exits when it cannot be found. Closes
2840 - We now use flag-driven logic to warn about obsolete configuration
2841 fields, so that we can include their names. In 0.4.2, we used a
2842 special type, which prevented us from generating good warnings.
2843 Implements ticket 32404.
2845 o Minor features (controller):
2846 - Add stream isolation data to STREAM event. Closes ticket 19859.
2847 - Implement a new GETINFO command to fetch microdescriptor
2848 consensus. Closes ticket 31684.
2850 o Minor features (debugging, directory system):
2851 - Don't crash when we find a non-guard with a guard-fraction value
2852 set. Instead, log a bug warning, in an attempt to figure out how
2853 this happened. Diagnostic for ticket 32868.
2855 o Minor features (defense in depth):
2856 - Add additional checks around tor_vasprintf() usage, in case the
2857 function returns an error. Patch by Tobias Stoeckmann. Fixes
2860 o Minor features (developer tooling):
2861 - Remove the 0.2.9.x series branches from git scripts (git-merge-
2862 forward.sh, git-pull-all.sh, git-push-all.sh, git-setup-dirs.sh).
2863 Closes ticket 32772.
2865 o Minor features (developer tools):
2866 - Add a check_cocci_parse.sh script that checks that new code is
2867 parseable by Coccinelle. Add an exceptions file for unparseable
2868 files, and run the script from travis CI. Closes ticket 31919.
2869 - Call the check_cocci_parse.sh script from a 'check-cocci' Makefile
2870 target. Closes ticket 31919.
2871 - Add a rename_c_identifiers.py tool to rename a bunch of C
2872 identifiers at once, and generate a well-formed commit message
2873 describing the change. This should help with refactoring. Closes
2875 - Add some scripts in "scripts/coccinelle" to invoke the Coccinelle
2876 semantic patching tool with the correct flags. These flags are
2877 fairly easy to forget, and these scripts should help us use
2878 Coccinelle more effectively in the future. Closes ticket 31705.
2880 o Minor features (Doxygen):
2881 - Update Doxygen configuration file to a more recent template (from
2882 1.8.15). Closes ticket 32110.
2883 - "make doxygen" now works with out-of-tree builds. Closes
2885 - Make sure that doxygen outputs documentation for all of our C
2886 files. Previously, some were missing @file declarations, causing
2887 them to be ignored. Closes ticket 32307.
2888 - Our "make doxygen" target now respects --enable-fatal-warnings by
2889 default, and does not warn about items that are missing
2890 documentation. To warn about missing documentation, run configure
2891 with the "--enable-missing-doc-warnings" flag: doing so suspends
2892 fatal warnings for doxygen. Closes ticket 32385.
2894 o Minor features (git scripts):
2895 - Add TOR_EXTRA_CLONE_ARGS to git-setup-dirs.sh for git clone
2896 customisation. Closes ticket 32347.
2897 - Add git-setup-dirs.sh, which sets up an upstream git repository
2898 and worktrees for tor maintainers. Closes ticket 29603.
2899 - Add TOR_EXTRA_REMOTE_* to git-setup-dirs.sh for a custom extra
2900 remote. Closes ticket 32347.
2901 - Call the check_cocci_parse.sh script from the git commit and push
2902 hooks. Closes ticket 31919.
2903 - Make git-push-all.sh skip unchanged branches when pushing to
2904 upstream. The script already skipped unchanged test branches.
2905 Closes ticket 32216.
2906 - Make git-setup-dirs.sh create a master symlink in the worktree
2907 directory. Closes ticket 32347.
2908 - Skip unmodified source files when doing some existing git hook
2909 checks. Related to ticket 31919.
2911 o Minor features (IPv6, client):
2912 - Make Tor clients tell dual-stack exits that they prefer IPv6
2913 connections. This change is equivalent to setting the PreferIPv6
2914 flag on SOCKSPorts (and most other listener ports). Tor Browser
2915 has been setting this flag for some time, and we want to remove a
2916 client distinguisher at exits. Closes ticket 32637.
2918 o Minor features (portability, android):
2919 - When building for Android, disable some tests that depend on $HOME
2920 and/or pwdb, which Android doesn't have. Closes ticket 32825.
2921 Patch from Hans-Christoph Steiner.
2923 o Minor features (relay modularity):
2924 - Split the relay and server pluggable transport config code into
2925 separate files in the relay module. Disable this code when the
2926 relay module is disabled. Closes part of ticket 32213.
2927 - When the relay module is disabled, reject attempts to set the
2928 ORPort, DirPort, DirCache, BridgeRelay, ExtORPort, or
2929 ServerTransport* options, rather than ignoring the values of these
2930 options. Closes part of ticket 32213.
2932 o Minor features (relay):
2933 - When the relay module is disabled, change the default config so
2934 that DirCache is 0, and ClientOnly is 1. Closes ticket 32410.
2936 o Minor features (release tools):
2937 - Port our ChangeLog formatting and sorting tools to Python 3.
2938 Closes ticket 32704.
2940 o Minor features (testing):
2941 - Detect some common failure cases for test_parseconf.sh in
2942 src/test/conf_failures. Closes ticket 32451.
2943 - Allow test_parseconf.sh to test expected log outputs for successful
2944 configs, as well as failed configs. Closes ticket 32451.
2945 - The test_parseconf.sh script now supports result variants for any
2946 combination of the optional libraries lzma, nss, and zstd. Closes
2949 o Minor features (tests, Android):
2950 - When running the unit tests on Android, create temporary files in
2951 a subdirectory of /data/local/tmp. Closes ticket 32172. Based on a
2952 patch from Hans-Christoph Steiner.
2954 o Minor bugfixes (bridges):
2955 - Lowercase the configured value of BridgeDistribution before adding
2956 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
2958 o Minor bugfixes (build system):
2959 - Fix "make autostyle" for out-of-tree builds. Fixes bug 32370;
2960 bugfix on 0.4.1.2-alpha.
2962 o Minor bugfixes (configuration handling):
2963 - Make control_event_conf_changed() take in a config_line_t instead
2964 of a smartlist of alternating key/value entries. Fixes bug 31531;
2965 bugfix on 0.2.3.3-alpha. Patch by Neel Chauhan.
2967 o Minor bugfixes (configuration):
2968 - Check for multiplication overflow when parsing memory units inside
2969 configuration. Fixes bug 30920; bugfix on 0.0.9rc1.
2970 - When dumping the configuration, stop adding a trailing space after
2971 the option name when there is no option value. This issue only
2972 affects options that accept an empty value or list. (Most options
2973 reject empty values, or delete the entire line from the dumped
2974 options.) Fixes bug 32352; bugfix on 0.0.9pre6.
2975 - Avoid changing the user's value of HardwareAccel as stored by
2976 SAVECONF, when AccelName is set but HardwareAccel is not. Fixes
2977 bug 32382; bugfix on 0.2.2.1-alpha.
2978 - When creating a KeyDirectory with the same location as the
2979 DataDirectory (not recommended), respect the DataDirectory's
2980 group-readable setting if one has not been set for the
2981 KeyDirectory. Fixes bug 27992; bugfix on 0.3.3.1-alpha.
2983 o Minor bugfixes (controller):
2984 - In routerstatus_has_changed(), check all the fields that are
2985 output over the control port. Fixes bug 20218; bugfix
2988 o Minor bugfixes (correctness checks):
2989 - Use GCC/Clang's printf-checking feature to make sure that
2990 tor_assertf() arguments are correctly typed. Fixes bug 32765;
2991 bugfix on 0.4.1.1-alpha.
2993 o Minor bugfixes (developer tools):
2994 - Allow paths starting with ./ in scripts/add_c_file.py. Fixes bug
2995 31336; bugfix on 0.4.1.2-alpha.
2997 o Minor bugfixes (dirauth module):
2998 - Split the dirauth config code into a separate file in the dirauth
2999 module. Disable this code when the dirauth module is disabled.
3000 Closes ticket 32213.
3001 - When the dirauth module is disabled, reject attempts to set the
3002 AuthoritativeDir option, rather than ignoring the value of the
3003 option. Fixes bug 32213; bugfix on 0.3.4.1-alpha.
3005 o Minor bugfixes (embedded Tor):
3006 - When starting Tor any time after the first time in a process,
3007 register the thread in which it is running as the main thread.
3008 Previously, we only did this on Windows, which could lead to bugs
3009 like 23081 on non-Windows platforms. Fixes bug 32884; bugfix
3012 o Minor bugfixes (git scripts):
3013 - Avoid sleeping before the last push in git-push-all.sh. Closes
3015 - Forward all unrecognised arguments in git-push-all.sh to git push.
3016 Closes ticket 32216.
3018 o Minor bugfixes (hidden service v3):
3019 - Do not rely on a "circuit established" flag for intro circuits but
3020 instead always query the HS circuit map. This is to avoid sync
3021 issue with that flag and the map. Fixes bug 32094; bugfix
3024 o Minor bugfixes (logging, crash):
3025 - Avoid a possible crash when trying to log a (fatal) assertion
3026 failure about mismatched magic numbers in configuration objects.
3027 Fixes bug 32771; bugfix on 0.4.2.1-alpha.
3029 o Minor bugfixes (onion service v2):
3030 - When sending the INTRO cell for a v2 Onion Service, look at the
3031 failure cache alongside timeout values to check if the intro point
3032 is marked as failed. Previously, we only looked at the relay
3033 timeout values. Fixes bug 25568; bugfix on 0.2.7.3-rc. Patch by
3036 o Minor bugfixes (onion services v3, client):
3037 - Properly handle the client rendezvous circuit timeout. Previously
3038 Tor would sometimes timeout a rendezvous circuit awaiting the
3039 introduction ACK, and find itself unable to re-establish all
3040 circuits because the rendezvous circuit timed out too early. Fixes
3041 bug 32021; bugfix on 0.3.2.1-alpha.
3043 o Minor bugfixes (onion services):
3044 - In cancel_descriptor_fetches(), use
3045 connection_list_by_type_purpose() instead of
3046 connection_list_by_type_state(). Fixes bug 32639; bugfix on
3047 0.3.2.1-alpha. Patch by Neel Chauhan.
3049 o Minor bugfixes (scripts):
3050 - Fix update_versions.py for out-of-tree builds. Fixes bug 32371;
3051 bugfix on 0.4.0.1-alpha.
3053 o Minor bugfixes (test):
3054 - Use the same code to find the tor binary in all of our test
3055 scripts. This change makes sure we are always using the coverage
3056 binary when coverage is enabled. Fixes bug 32368; bugfix
3059 o Minor bugfixes (testing):
3060 - Stop ignoring "tor --dump-config" errors in test_parseconf.sh.
3061 Fixes bug 32468; bugfix on 0.4.2.1-alpha.
3062 - When TOR_DISABLE_PRACTRACKER is set, do not apply it to the
3063 test_practracker.sh script. Doing so caused a test failure. Fixes
3064 bug 32705; bugfix on 0.4.2.1-alpha.
3065 - When TOR_DISABLE_PRACTRACKER is set, log a notice to stderr when
3066 skipping practracker checks. Fixes bug 32705; bugfix
3069 o Minor bugfixes (tests):
3070 - Our option-validation tests no longer depend on specially
3071 configured non-default, non-passing sets of options. Previously,
3072 the tests had been written to assume that options would _not_ be
3073 set to their defaults, which led to needless complexity and
3074 verbosity. Fixes bug 32175; bugfix on 0.2.8.1-alpha.
3076 o Minor bugfixes (windows service):
3077 - Initialize the publish/subscribe system when running as a windows
3078 service. Fixes bug 32778; bugfix on 0.4.1.1-alpha.
3080 o Deprecated features:
3081 - Deprecate the ClientAutoIPv6ORPort option. This option was not
3082 true "Happy Eyeballs", and often failed on connections that
3083 weren't reliably dual-stack. Closes ticket 32942. Patch by
3087 - Provide a quickstart guide for a Circuit Padding Framework, and
3088 documentation for researchers to implement and study circuit
3089 padding machines. Closes ticket 28804.
3090 - Add documentation in 'HelpfulTools.md' to describe how to build a
3091 tag file. Closes ticket 32779.
3092 - Create a high-level description of the long-term software
3093 architecture goals. Closes ticket 32206.
3094 - Describe the --dump-config command in the manual page. Closes
3096 - Unite coding advice from this_not_that.md in torguts repo into our
3097 coding standards document. Resolves ticket 31853.
3100 - Our Doxygen configuration no longer generates LaTeX output. The
3101 reference manual produced by doing this was over 4000 pages long,
3102 and generally unusable. Closes ticket 32099.
3103 - The option "TestingEstimatedDescriptorPropagationTime" is now
3104 marked as obsolete. It has had no effect since 0.3.0.7, when
3105 clients stopped rejecting consensuses "from the future". Closes
3107 - We no longer support consensus methods before method 28; these
3108 methods were only used by authorities running versions of Tor that
3109 are now at end-of-life. In effect, this means that clients,
3110 relays, and authorities now assume that authorities will be
3111 running version 0.3.5.x or later. Closes ticket 32695.
3114 - Add more test cases for tor's UTF-8 validation function. Also,
3115 check the arguments passed to the function for consistency. Closes
3117 - Improve test coverage for relay and dirauth config code, focusing
3118 on option validation and normalization. Closes ticket 32213.
3119 - Improve the consistency of test_parseconf.sh output, and run all
3120 the tests, even if one fails. Closes ticket 32213.
3121 - Re-enable the Travis CI macOS Chutney build, but don't let it
3122 prevent the Travis job from finishing. (The Travis macOS jobs are
3123 slow, so we don't want to have it delay the whole CI process.)
3124 Closes ticket 32629.
3125 - Run the practracker unit tests in the pre-commit git hook. Closes
3127 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
3128 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
3129 fix the sandbox errors in 32722. Closes ticket 32240.
3131 o Code simplification and refactoring (channel):
3132 - Channel layer had a variable length cell handler that was not used
3133 and thus removed. Closes ticket 32892.
3135 o Code simplification and refactoring (configuration):
3136 - Immutability is now implemented as a flag on individual
3137 configuration options rather than as part of the option-transition
3138 checking code. Closes ticket 32344.
3139 - Instead of keeping a list of configuration options to check for
3140 relative paths, check all the options whose type is "FILENAME".
3141 Solves part of ticket 32339.
3142 - Our default log (which ordinarily sends NOTICE-level messages to
3143 standard output) is now handled in a more logical manner.
3144 Previously, we replaced the configured log options if they were
3145 empty. Now, we interpret an empty set of log options as meaning
3146 "use the default log". Closes ticket 31999.
3147 - Remove some unused arguments from the options_validate() function,
3148 to simplify our code and tests. Closes ticket 32187.
3149 - Simplify the options_validate() code so that it looks at the
3150 default options directly, rather than taking default options as an
3151 argument. This change lets us simplify its interface. Closes
3153 - Use our new configuration architecture to move most authority-
3154 related options to the directory authority module. Closes
3156 - When parsing the command line, handle options that determine our
3157 "quiet level" and our mode of operation (e.g., --dump-config and
3158 so on) all in one table. Closes ticket 32003.
3160 o Code simplification and refactoring (controller):
3161 - Create a new abstraction for formatting control protocol reply
3162 lines based on key-value pairs. Refactor some existing control
3163 protocol code to take advantage of this. Closes ticket 30984.
3164 - Create a helper function that can fetch network status or
3165 microdesc consensuses. Closes ticket 31684.
3167 o Code simplification and refactoring (dirauth modularization):
3168 - Remove the last remaining HAVE_MODULE_DIRAUTH inside a function.
3169 Closes ticket 32163.
3170 - Replace some confusing identifiers in process_descs.c. Closes
3172 - Simplify some relay and dirauth config code. Closes ticket 32213.
3174 o Code simplification and refactoring (misc):
3175 - Make all the structs we declare follow the same naming convention
3176 of ending with "_t". Closes ticket 32415.
3177 - Move and rename some configuration-related code for clarity.
3178 Closes ticket 32304.
3179 - Our include.am files are now broken up by subdirectory.
3180 Previously, src/core/include.am covered all of the subdirectories
3181 in "core", "feature", and "app". Closes ticket 32137.
3182 - Remove underused NS*() macros from test code: they make our tests
3183 more confusing, especially for code-formatting tools. Closes
3186 o Code simplification and refactoring (relay modularization):
3187 - Disable relay_periodic when the relay module is disabled. Closes
3189 - Disable relay_sys when the relay module is disabled. Closes
3192 o Code simplification and refactoring (tool support):
3193 - Add numerous missing dependencies to our include files, so that
3194 they can be included in different reasonable orders and still
3195 compile. Addresses part of ticket 32764.
3196 - Fix some parts of our code that were difficult for Coccinelle to
3197 parse. Related to ticket 31705.
3198 - Fix some small issues in our code that prevented automatic
3199 formatting tools from working. Addresses part of ticket 32764.
3201 o Documentation (manpage):
3202 - Alphabetize the Client Options section of the tor manpage. Closes
3204 - Alphabetize the General Options section of the tor manpage. Closes
3206 - In the tor(1) manpage, reword and improve formatting of the
3207 COMMAND-LINE OPTIONS and DESCRIPTION sections. Closes ticket
3208 32277. Based on work by Swati Thacker as part of Google Season
3210 - In the tor(1) manpage, reword and improve formatting of the FILES,
3211 SEE ALSO, and BUGS sections. Closes ticket 32176. Based on work by
3212 Swati Thacker as part of Google Season of Docs.
3214 o Testing (circuit, EWMA):
3215 - Add unit tests for circuitmux and EWMA subsystems. Closes
3218 o Testing (continuous integration):
3219 - Use zstd in our Travis Linux builds. Closes ticket 32242.
3222 Changes in version 0.4.2.5 - 2019-12-09
3223 This is the first stable release in the 0.4.2.x series. This series
3224 improves reliability and stability, and includes several stability and
3225 correctness improvements for onion services. It also fixes many smaller
3226 bugs present in previous series.
3228 Per our support policy, we will support the 0.4.2.x series for nine
3229 months, or until three months after the release of a stable 0.4.3.x:
3230 whichever is longer. If you need longer-term support, please stick
3231 with 0.3.5.x, which will we plan to support until Feb 2022.
3233 Per our support policy, we will support the 0.4.2.x series for nine
3234 months, or until three months after the release of a stable 0.4.3.x:
3235 whichever is longer. If you need longer-term support, please stick
3236 with 0.3.5.x, which will we plan to support until Feb 2022.
3238 Below are the changes since 0.4.1.4-rc. For a complete list of changes
3239 since 0.4.1.5, see the ReleaseNotes file.
3241 o Minor features (geoip):
3242 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
3243 Country database. Closes ticket 32685.
3246 - Require C99 standards-conforming code in Travis CI, but allow GNU
3247 gcc extensions. Also activates clang's -Wtypedef-redefinition
3248 warnings. Build some jobs with -std=gnu99, and some jobs without.
3249 Closes ticket 32500.
3252 Changes in version 0.4.1.7 - 2019-12-09
3253 This release backports several bugfixes to improve stability and
3254 correctness. Anyone experiencing build problems or crashes with 0.4.1.6,
3255 including all relays relying on AccountingMax, should upgrade.
3257 o Major features (directory authorities, backport from 0.4.2.2-alpha):
3258 - Directory authorities now reject relays running all currently
3259 deprecated release series. The currently supported release series
3260 are: 0.2.9, 0.3.5, 0.4.0, 0.4.1, and 0.4.2. Closes ticket 31549.
3262 o Major bugfixes (embedded Tor, backport from 0.4.2.2-alpha):
3263 - Avoid a possible crash when restarting Tor in embedded mode and
3264 enabling a different set of publish/subscribe messages. Fixes bug
3265 31898; bugfix on 0.4.1.1-alpha.
3267 o Major bugfixes (relay, backport from 0.4.2.3-alpha):
3268 - Relays now respect their AccountingMax bandwidth again. When
3269 relays entered "soft" hibernation (which typically starts when
3270 we've hit 90% of our AccountingMax), we had stopped checking
3271 whether we should enter hard hibernation. Soft hibernation refuses
3272 new connections and new circuits, but the existing circuits can
3273 continue, meaning that relays could have exceeded their configured
3274 AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.
3276 o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha):
3277 - Stop ignoring torrc options after an %include directive, when the
3278 included directory ends with a file that does not contain any
3279 config options (but does contain comments or whitespace). Fixes
3280 bug 31408; bugfix on 0.3.1.1-alpha.
3282 o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha):
3283 - Onion services now always use the exact number of intro points
3284 configured with the HiddenServiceNumIntroductionPoints option (or
3285 fewer if nodes are excluded). Before, a service could sometimes
3286 pick more intro points than configured. Fixes bug 31548; bugfix
3289 o Minor features (continuous integration, backport from 0.4.2.2-alpha):
3290 - When building on Appveyor and Travis, pass the "-k" flag to make,
3291 so that we are informed of all compilation failures, not just the
3292 first one or two. Closes ticket 31372.
3294 o Minor features (geoip, backport from 0.4.2.5):
3295 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
3296 Country database. Closes ticket 32685.
3298 o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha):
3299 - Avoid spurious errors when Appveyor CI fails before the install step.
3300 Fixes bug 31884; bugfix on 0.3.4.2-alpha.
3302 o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc):
3303 - Fix a BUG() assertion that occurs within a very small race window
3304 between when a client intro circuit opens and when its descriptor
3305 gets cleaned up from the cache. The circuit is now closed early,
3306 which will trigger a re-fetch of the descriptor and continue the
3307 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
3309 o Minor bugfixes (connections, backport from 0.4.2.3-rc):
3310 - Avoid trying to read data from closed connections, which can cause
3311 needless loops in Libevent and infinite loops in Shadow. Fixes bug
3312 30344; bugfix on 0.1.1.1-alpha.
3314 o Minor bugfixes (error handling, backport from 0.4.2.1-alpha):
3315 - On abort, try harder to flush the output buffers of log messages.
3316 On some platforms (macOS), log messages could be discarded when
3317 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
3318 - Report the tor version whenever an assertion fails. Previously, we
3319 only reported the Tor version on some crashes, and some non-fatal
3320 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
3321 - When tor aborts due to an error, close log file descriptors before
3322 aborting. Closing the logs makes some OSes flush log file buffers,
3323 rather than deleting buffered log lines. Fixes bug 31594; bugfix
3326 o Minor bugfixes (logging, backport from 0.4.2.2-alpha):
3327 - Add a missing check for HAVE_PTHREAD_H, because the backtrace code
3328 uses mutexes. Fixes bug 31614; bugfix on 0.2.5.2-alpha.
3329 - Disable backtrace signal handlers when shutting down tor. Fixes
3330 bug 31614; bugfix on 0.2.5.2-alpha.
3331 - Rate-limit our the logging message about the obsolete .exit
3332 notation. Previously, there was no limit on this warning, which
3333 could potentially be triggered many times by a hostile website.
3334 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
3336 o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha):
3337 - Do not log a nonfatal assertion failure when receiving a VERSIONS
3338 cell on a connection using the obsolete v1 link protocol. Log a
3339 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
3341 o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha):
3342 - Reset the periodic events' "enabled" flag when Tor is shut down
3343 cleanly. Previously, this flag was left on, which caused periodic
3344 events not to be re-enabled when Tor was relaunched in-process
3345 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
3348 o Minor bugfixes (multithreading, backport from 0.4.2.2-alpha):
3349 - Avoid some undefined behaviour when freeing mutexes. Fixes bug
3350 31736; bugfix on 0.0.7.
3352 o Minor bugfixes (process management, backport from 0.4.2.3-alpha):
3353 - Remove overly strict assertions that triggered when a pluggable
3354 transport failed to launch. Fixes bug 31091; bugfix
3356 - Remove an assertion in the Unix process backend. This assertion
3357 would trigger when we failed to find the executable for a child
3358 process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.
3360 o Minor bugfixes (relay, backport from 0.4.2.2-alpha):
3361 - Avoid crashing when starting with a corrupt keys directory where
3362 the old ntor key and the new ntor key are identical. Fixes bug
3363 30916; bugfix on 0.2.4.8-alpha.
3365 o Minor bugfixes (testing, backport from 0.4.2.3-alpha):
3366 - When testing port rebinding, don't busy-wait for tor to log.
3367 Instead, actually sleep for a short time before polling again.
3368 Also improve the formatting of control commands and log messages.
3369 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
3371 o Minor bugfixes (tests, SunOS, backport from 0.4.2.2-alpha):
3372 - Avoid a map_anon_nofork test failure due to a signed/unsigned
3373 integer comparison. Fixes bug 31897; bugfix on 0.4.1.1-alpha.
3375 o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha):
3376 - Log bugs about the TLS read buffer's length only once, rather than
3377 filling the logs with similar warnings. Fixes bug 31939; bugfix
3380 o Documentation (backport from 0.4.2.2-alpha):
3381 - Explain why we can't destroy the backtrace buffer mutex. Explain
3382 why we don't need to destroy the log mutex. Closes ticket 31736.
3384 o Testing (continuous integration, backport from 0.4.2.3-alpha):
3385 - Disable all but one Travis CI macOS build, to mitigate slow
3386 scheduling of Travis macOS jobs. Closes ticket 32177.
3387 - Run the chutney IPv6 networks as part of Travis CI. Closes
3389 - Simplify the Travis CI build matrix, and optimise for build time.
3390 Closes ticket 31859.
3391 - Use Windows Server 2019 instead of Windows Server 2016 in our
3392 Appveyor builds. Closes ticket 32086.
3394 o Testing (continuous integration, backport from 0.4.2.4-rc):
3395 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
3396 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
3397 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
3398 until we can fix some Bionic permissions issues (see ticket
3399 32240). Related to ticket 31919.
3400 - Install the mingw OpenSSL package in Appveyor. This makes sure
3401 that the OpenSSL headers and libraries match in Tor's Appveyor
3402 builds. (This bug was triggered by an Appveyor image update.)
3403 Fixes bug 32449; bugfix on 0.3.5.6-rc.
3405 o Testing (continuous integration, backport from 0.4.2.5):
3406 - Require C99 standards-conforming code in Travis CI, but allow GNU gcc
3407 extensions. Also activates clang's -Wtypedef-redefinition warnings.
3408 Build some jobs with -std=gnu99, and some jobs without.
3409 Closes ticket 32500.
3412 Changes in version 0.4.0.6 - 2019-12-09
3413 This is the second stable release in the 0.4.0.x series. This release
3414 backports several bugfixes to improve stability and correctness. Anyone
3415 experiencing build problems or crashes with 0.4.0.5, including all relays
3416 relying on AccountingMax, should upgrade.
3418 Note that, per our support policy, support for the 0.4.0.x series will end
3419 on 2 Feb 2020. Anyone still running 0.4.0.x should plan to upgrade to the
3420 latest stable release, or downgrade to 0.3.5.x, which will get long-term
3421 support until 1 Feb 2022.
3423 o Directory authority changes (backport from 0.4.1.5):
3424 - The directory authority "dizum" has a new IP address. Closes
3427 o Major bugfixes (bridges, backport from 0.4.1.2-alpha):
3428 - Consider our directory information to have changed when our list
3429 of bridges changes. Previously, Tor would not re-compute the
3430 status of its directory information when bridges changed, and
3431 therefore would not realize that it was no longer able to build
3432 circuits. Fixes part of bug 29875.
3433 - Do not count previously configured working bridges towards our
3434 total of working bridges. Previously, when Tor's list of bridges
3435 changed, it would think that the old bridges were still usable,
3436 and delay fetching router descriptors for the new ones. Fixes part
3437 of bug 29875; bugfix on 0.3.0.1-alpha.
3439 o Major bugfixes (circuit build, guard, backport from 0.4.1.4-rc):
3440 - When considering upgrading circuits from "waiting for guard" to
3441 "open", always ignore circuits that are marked for close. Otherwise,
3442 we can end up in the situation where a subsystem is notified that
3443 a closing circuit has just opened, leading to undesirable
3444 behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha.
3446 o Major bugfixes (Onion service reachability, backport from 0.4.1.3-alpha):
3447 - Properly clean up the introduction point map when circuits change
3448 purpose from onion service circuits to pathbias, measurement, or
3449 other circuit types. This should fix some service-side instances
3450 of introduction point failure. Fixes bug 29034; bugfix
3453 o Major bugfixes (onion service v3, backport from 0.4.1.1-alpha):
3454 - Fix an unreachable bug in which an introduction point could try to
3455 send an INTRODUCE_ACK with a status code that Trunnel would refuse
3456 to encode, leading the relay to assert(). We've consolidated the
3457 ABI values into Trunnel now. Fixes bug 30454; bugfix
3459 - Clients can now handle unknown status codes from INTRODUCE_ACK
3460 cells. (The NACK behavior will stay the same.) This will allow us
3461 to extend status codes in the future without breaking the normal
3462 client behavior. Fixes another part of bug 30454; bugfix
3465 o Major bugfixes (relay, backport from 0.4.2.3-alpha):
3466 - Relays now respect their AccountingMax bandwidth again. When
3467 relays entered "soft" hibernation (which typically starts when
3468 we've hit 90% of our AccountingMax), we had stopped checking
3469 whether we should enter hard hibernation. Soft hibernation refuses
3470 new connections and new circuits, but the existing circuits can
3471 continue, meaning that relays could have exceeded their configured
3472 AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.
3474 o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha):
3475 - Stop ignoring torrc options after an %include directive, when the
3476 included directory ends with a file that does not contain any
3477 config options (but does contain comments or whitespace). Fixes
3478 bug 31408; bugfix on 0.3.1.1-alpha.
3480 o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha):
3481 - Onion services now always use the exact number of intro points
3482 configured with the HiddenServiceNumIntroductionPoints option (or
3483 fewer if nodes are excluded). Before, a service could sometimes
3484 pick more intro points than configured. Fixes bug 31548; bugfix
3487 o Minor features (compile-time modules, backport from version 0.4.1.1-alpha):
3488 - Add a "--list-modules" command to print a list of which compile-
3489 time modules are enabled. Closes ticket 30452.
3491 o Minor features (continuous integration, backport from 0.4.1.1-alpha):
3492 - Remove sudo configuration lines from .travis.yml as they are no
3493 longer needed with current Travis build environment. Resolves
3496 o Minor features (continuous integration, backport from 0.4.1.4-rc):
3497 - Our Travis configuration now uses Chutney to run some network
3498 integration tests automatically. Closes ticket 29280.
3500 o Minor features (continuous integration, backport from 0.4.2.2-alpha):
3501 - When building on Appveyor and Travis, pass the "-k" flag to make,
3502 so that we are informed of all compilation failures, not just the
3503 first one or two. Closes ticket 31372.
3505 o Minor features (fallback directory list, backport from 0.4.1.4-rc):
3506 - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc
3507 in December 2018 (of which ~122 were still functional), with a
3508 list of 148 fallbacks (70 new, 78 existing, 79 removed) generated
3509 in June 2019. Closes ticket 28795.
3511 o Minor features (geoip, backport from 0.4.2.5):
3512 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
3513 Country database. Closes ticket 32685.
3515 o Minor features (stem tests, backport from 0.4.2.1-alpha):
3516 - Change "make test-stem" so it only runs the stem tests that use
3517 tor. This change makes test-stem faster and more reliable. Closes
3520 o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha):
3521 - Avoid spurious errors when Appveyor CI fails before the install step.
3522 Fixes bug 31884; bugfix on 0.3.4.2-alpha.
3524 o Minor bugfixes (build system, backport form 0.4.2.1-alpha):
3525 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
3526 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
3528 o Minor bugfixes (circuit isolation, backport from 0.4.1.3-alpha):
3529 - Fix a logic error that prevented the SessionGroup sub-option from
3530 being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha.
3532 o Minor bugfixes (circuit padding, backport from 0.4.1.4-rc):
3533 - On relays, properly check that a padding machine is absent before
3534 logging a warning about it being absent. Fixes bug 30649; bugfix
3537 o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc):
3538 - Fix a BUG() assertion that occurs within a very small race window
3539 between when a client intro circuit opens and when its descriptor
3540 gets cleaned up from the cache. The circuit is now closed early,
3541 which will trigger a re-fetch of the descriptor and continue the
3542 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
3544 o Minor bugfixes (clock skew detection, backport from 0.4.1.5):
3545 - Don't believe clock skew results from NETINFO cells that appear to
3546 arrive before we sent the VERSIONS cells they are responding to.
3547 Previously, we would accept them up to 3 minutes "in the past".
3548 Fixes bug 31343; bugfix on 0.2.4.4-alpha.
3550 o Minor bugfixes (compilation warning, backport from 0.4.1.5):
3551 - Fix a compilation warning on Windows about casting a function
3552 pointer for GetTickCount64(). Fixes bug 31374; bugfix
3555 o Minor bugfixes (compilation, backport from 0.4.1.5):
3556 - Avoid using labs() on time_t, which can cause compilation warnings
3557 on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
3559 o Minor bugfixes (compilation, backport from 0.4.2.1-alpha):
3560 - Suppress spurious float-conversion warnings from GCC when calling
3561 floating-point classifier functions on FreeBSD. Fixes part of bug
3562 31687; bugfix on 0.3.1.5-alpha.
3564 o Minor bugfixes (compilation, unusual configurations, backport from 0.4.1.1-alpha):
3565 - Avoid failures when building with the ALL_BUGS_ARE_FATAL option
3566 due to missing declarations of abort(), and prevent other such
3567 failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.
3569 o Minor bugfixes (configuration, proxies, backport from 0.4.1.2-alpha):
3570 - Fix a bug that prevented us from supporting SOCKS5 proxies that
3571 want authentication along with configured (but unused!)
3572 ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.
3574 o Minor bugfixes (connections, backport from 0.4.2.3-rc):
3575 - Avoid trying to read data from closed connections, which can cause
3576 needless loops in Libevent and infinite loops in Shadow. Fixes bug
3577 30344; bugfix on 0.1.1.1-alpha.
3579 o Minor bugfixes (continuous integration, backport from 0.4.1.3-alpha):
3580 - Allow the test-stem job to fail in Travis, because it sometimes
3581 hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha.
3582 - Skip test_rebind on macOS in Travis, because it is unreliable on
3583 macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
3584 - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment
3585 variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
3587 o Minor bugfixes (crash on exit, backport from 0.4.1.4-rc):
3588 - Avoid a set of possible code paths that could try to use freed
3589 memory in routerlist_free() while Tor was exiting. Fixes bug
3590 31003; bugfix on 0.1.2.2-alpha.
3592 o Minor bugfixes (directory authorities, backport from 0.4.1.3-alpha):
3593 - Stop crashing after parsing an unknown descriptor purpose
3594 annotation. We think this bug can only be triggered by modifying a
3595 local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha.
3597 o Minor bugfixes (directory authority, backport from 0.4.1.2-alpha):
3598 - Move the "bandwidth-file-headers" line in directory authority
3599 votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix
3602 o Minor bugfixes (error handling, backport from 0.4.2.1-alpha):
3603 - On abort, try harder to flush the output buffers of log messages.
3604 On some platforms (macOS), log messages could be discarded when
3605 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
3606 - Report the tor version whenever an assertion fails. Previously, we
3607 only reported the Tor version on some crashes, and some non-fatal
3608 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
3610 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha):
3611 - When extracting an IPv6 address from a PF-based proxy, verify that
3612 we are actually configured to receive an IPv6 address, and log an
3613 internal error if not. Fixes part of bug 31687; bugfix
3616 o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
3617 - When tor is missing descriptors for some primary entry guards,
3618 make the log message less alarming. It's normal for descriptors to
3619 expire, as long as tor fetches new ones soon after. Fixes bug
3620 31657; bugfix on 0.3.3.1-alpha.
3622 o Minor bugfixes (logging, backport from 0.4.1.1-alpha):
3623 - Do not log a warning when running with an OpenSSL version other
3624 than the one Tor was compiled with, if the two versions should be
3625 compatible. Previously, we would warn whenever the version was
3626 different. Fixes bug 30190; bugfix on 0.2.4.2-alpha.
3628 o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
3629 - Change log level of message "Hash of session info was not as
3630 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
3633 o Minor bugfixes (logging, backport from 0.4.2.2-alpha):
3634 - Rate-limit our the logging message about the obsolete .exit
3635 notation. Previously, there was no limit on this warning, which
3636 could potentially be triggered many times by a hostile website.
3637 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
3639 o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha):
3640 - Do not log a nonfatal assertion failure when receiving a VERSIONS
3641 cell on a connection using the obsolete v1 link protocol. Log a
3642 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
3644 o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha):
3645 - Reset the periodic events' "enabled" flag when Tor is shut down
3646 cleanly. Previously, this flag was left on, which caused periodic
3647 events not to be re-enabled when Tor was relaunched in-process
3648 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
3651 o Minor bugfixes (memory leak, backport from 0.4.1.1-alpha):
3652 - Avoid a minor memory leak that could occur on relays when failing
3653 to create a "keys" directory. Fixes bug 30148; bugfix
3656 o Minor bugfixes (memory leak, backport from 0.4.1.4-rc):
3657 - Fix a trivial memory leak when parsing an invalid value
3658 from a download schedule in the configuration. Fixes bug
3659 30894; bugfix on 0.3.4.1-alpha.
3661 o Minor bugfixes (NetBSD, backport from 0.4.1.2-alpha):
3662 - Fix usage of minherit() on NetBSD and other platforms that define
3663 MAP_INHERIT_{ZERO,NONE} instead of INHERIT_{ZERO,NONE}. Fixes bug
3664 30614; bugfix on 0.4.0.2-alpha. Patch from Taylor Campbell.
3666 o Minor bugfixes (onion services, backport from 0.4.1.1-alpha):
3667 - Avoid a GCC 9.1.1 warning (and possible crash depending on libc
3668 implemenation) when failing to load an onion service client
3669 authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha.
3671 o Minor bugfixes (out-of-memory handler, backport from 0.4.1.2-alpha):
3672 - When purging the DNS cache because of an out-of-memory condition,
3673 try purging just the older entries at first. Previously, we would
3674 always purge the whole thing. Fixes bug 29617; bugfix
3677 o Minor bugfixes (portability, backport from 0.4.1.2-alpha):
3678 - Avoid crashing in our tor_vasprintf() implementation on systems
3679 that define neither vasprintf() nor _vscprintf(). (This bug has
3680 been here long enough that we question whether people are running
3681 Tor on such systems, but we're applying the fix out of caution.)
3682 Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by
3685 o Minor bugfixes (process management, backport from 0.4.2.3-alpha):
3686 - Remove overly strict assertions that triggered when a pluggable
3687 transport failed to launch. Fixes bug 31091; bugfix
3689 - Remove an assertion in the Unix process backend. This assertion
3690 would trigger when we failed to find the executable for a child
3691 process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.
3693 o Minor bugfixes (relay, backport from 0.4.2.2-alpha):
3694 - Avoid crashing when starting with a corrupt keys directory where
3695 the old ntor key and the new ntor key are identical. Fixes bug
3696 30916; bugfix on 0.2.4.8-alpha.
3698 o Minor bugfixes (rust, backport from 0.4.2.1-alpha):
3699 - Correctly exclude a redundant rust build job in Travis. Fixes bug
3700 31463; bugfix on 0.3.5.4-alpha.
3702 o Minor bugfixes (testing, backport from 0.4.2.3-alpha):
3703 - When testing port rebinding, don't busy-wait for tor to log.
3704 Instead, actually sleep for a short time before polling again.
3705 Also improve the formatting of control commands and log messages.
3706 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
3708 o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha):
3709 - Log bugs about the TLS read buffer's length only once, rather than
3710 filling the logs with similar warnings. Fixes bug 31939; bugfix
3713 o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
3714 - Always retry v2 single onion service intro and rend circuits with
3715 a 3-hop path. Previously, v2 single onion services used a 3-hop
3716 path when rendezvous circuits were retried after a remote or
3717 delayed failure, but a 1-hop path for immediate retries. Fixes bug
3718 23818; bugfix on 0.2.9.3-alpha.
3719 - Make v3 single onion services fall back to a 3-hop intro, when all
3720 intro points are unreachable via a 1-hop path. Previously, v3
3721 single onion services failed when all intro nodes were unreachable
3722 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
3724 o Documentation (backport from 0.4.2.1-alpha):
3725 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
3726 notice.html so that operators no longer have to host it
3727 themselves. Closes ticket 31089.
3729 o Testing (backport from 0.4.1.2-alpha):
3730 - Specify torrc paths (with empty files) when launching tor in
3731 integration tests; refrain from reading user and system torrcs.
3732 Resolves issue 29702.
3734 o Testing (continuous integration, backport from 0.4.1.1-alpha):
3735 - In Travis, show stem's tor log after failure. Closes ticket 30234.
3737 o Testing (continuous integration, backport from 0.4.1.5):
3738 - In Travis, make stem log a controller trace to the console, and
3739 tail stem's tor log after failure. Closes ticket 30591.
3740 - In Travis, only run the stem tests that use a tor binary. Closes
3743 o Testing (continuous integration, backport from 0.4.2.3-alpha):
3744 - Disable all but one Travis CI macOS build, to mitigate slow
3745 scheduling of Travis macOS jobs. Closes ticket 32177.
3746 - Run the chutney IPv6 networks as part of Travis CI. Closes
3748 - Simplify the Travis CI build matrix, and optimise for build time.
3749 Closes ticket 31859.
3750 - Use Windows Server 2019 instead of Windows Server 2016 in our
3751 Appveyor builds. Closes ticket 32086.
3753 o Testing (continuous integration, backport from 0.4.2.4-rc):
3754 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
3755 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
3756 until we can fix some Bionic permissions issues (see ticket
3757 32240). Related to ticket 31919.
3758 - Install the mingw OpenSSL package in Appveyor. This makes sure
3759 that the OpenSSL headers and libraries match in Tor's Appveyor
3760 builds. (This bug was triggered by an Appveyor image update.)
3761 Fixes bug 32449; bugfix on 0.3.5.6-rc.
3762 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
3764 o Testing (continuous integration, backport from 0.4.2.5):
3765 - Require C99 standards-conforming code in Travis CI, but allow GNU gcc
3766 extensions. Also activates clang's -Wtypedef-redefinition warnings.
3767 Build some jobs with -std=gnu99, and some jobs without.
3768 Closes ticket 32500.
3770 Changes in version 0.3.5.9 - 2019-12-09
3771 Tor 0.3.5.9 backports serveral fixes from later releases, including
3772 several that affect bridge users, relay stability, onion services,
3775 o Directory authority changes (backport from 0.4.1.5):
3776 - The directory authority "dizum" has a new IP address. Closes
3779 o Major bugfixes (bridges, backport from 0.4.1.2-alpha):
3780 - Consider our directory information to have changed when our list
3781 of bridges changes. Previously, Tor would not re-compute the
3782 status of its directory information when bridges changed, and
3783 therefore would not realize that it was no longer able to build
3784 circuits. Fixes part of bug 29875.
3785 - Do not count previously configured working bridges towards our
3786 total of working bridges. Previously, when Tor's list of bridges
3787 changed, it would think that the old bridges were still usable,
3788 and delay fetching router descriptors for the new ones. Fixes part
3789 of bug 29875; bugfix on 0.3.0.1-alpha.
3791 o Major bugfixes (circuit build, guard, backport from 0.4.1.4-rc):
3792 - When considering upgrading circuits from "waiting for guard" to
3793 "open", always ignore circuits that are marked for close. Otherwise,
3794 we can end up in the situation where a subsystem is notified that
3795 a closing circuit has just opened, leading to undesirable
3796 behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha.
3798 o Major bugfixes (NSS, relay, backport from 0.4.0.4-rc):
3799 - When running with NSS, disable TLS 1.2 ciphersuites that use
3800 SHA384 for their PRF. Due to an NSS bug, the TLS key exporters for
3801 these ciphersuites don't work -- which caused relays to fail to
3802 handshake with one another when these ciphersuites were enabled.
3803 Fixes bug 29241; bugfix on 0.3.5.1-alpha.
3805 o Major bugfixes (Onion service reachability, backport from 0.4.1.3-alpha):
3806 - Properly clean up the introduction point map when circuits change
3807 purpose from onion service circuits to pathbias, measurement, or
3808 other circuit types. This should fix some service-side instances
3809 of introduction point failure. Fixes bug 29034; bugfix
3812 o Major bugfixes (onion service v3, backport from 0.4.1.1-alpha):
3813 - Fix an unreachable bug in which an introduction point could try to
3814 send an INTRODUCE_ACK with a status code that Trunnel would refuse
3815 to encode, leading the relay to assert(). We've consolidated the
3816 ABI values into Trunnel now. Fixes bug 30454; bugfix
3818 - Clients can now handle unknown status codes from INTRODUCE_ACK
3819 cells. (The NACK behavior will stay the same.) This will allow us
3820 to extend status codes in the future without breaking the normal
3821 client behavior. Fixes another part of bug 30454; bugfix
3824 o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha):
3825 - Stop ignoring torrc options after an %include directive, when the
3826 included directory ends with a file that does not contain any
3827 config options (but does contain comments or whitespace). Fixes
3828 bug 31408; bugfix on 0.3.1.1-alpha.
3830 o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha):
3831 - Onion services now always use the exact number of intro points
3832 configured with the HiddenServiceNumIntroductionPoints option (or
3833 fewer if nodes are excluded). Before, a service could sometimes
3834 pick more intro points than configured. Fixes bug 31548; bugfix
3837 o Minor features (address selection, backport from 0.4.0.3-alpha):
3838 - Treat the subnet 100.64.0.0/10 as public for some purposes;
3839 private for others. This subnet is the RFC 6598 (Carrier Grade
3840 NAT) IP range, and is deployed by many ISPs as an alternative to
3841 RFC 1918 that does not break existing internal networks. Tor now
3842 blocks SOCKS and control ports on these addresses and warns users
3843 if client ports or ExtORPorts are listening on a RFC 6598 address.
3844 Closes ticket 28525. Patch by Neel Chauhan.
3846 o Minor features (bandwidth authority, backport from 0.4.0.4-rc):
3847 - Make bandwidth authorities ignore relays that are reported in the
3848 bandwidth file with the flag "vote=0". This change allows us to
3849 report unmeasured relays for diagnostic reasons without including
3850 their bandwidth in the bandwidth authorities' vote. Closes
3853 o Minor features (compile-time modules, backport from version 0.4.1.1-alpha):
3854 - Add a "--list-modules" command to print a list of which compile-
3855 time modules are enabled. Closes ticket 30452.
3857 o Minor features (continuous integration, backport from 0.4.0.4-rc):
3858 - On Travis Rust builds, cleanup Rust registry and refrain from
3859 caching the "target/" directory to speed up builds. Resolves
3862 o Minor features (continuous integration, backport from 0.4.0.5):
3863 - In Travis, tell timelimit to use stem's backtrace signals, and
3864 launch python directly from timelimit, so python receives the
3865 signals from timelimit, rather than make. Closes ticket 30117.
3867 o Minor features (continuous integration, backport from 0.4.1.1-alpha):
3868 - Remove sudo configuration lines from .travis.yml as they are no
3869 longer needed with current Travis build environment. Resolves
3872 o Minor features (continuous integration, backport from 0.4.1.4-rc):
3873 - Our Travis configuration now uses Chutney to run some network
3874 integration tests automatically. Closes ticket 29280.
3876 o Minor features (continuous integration, backport from 0.4.2.2-alpha):
3877 - When building on Appveyor and Travis, pass the "-k" flag to make,
3878 so that we are informed of all compilation failures, not just the
3879 first one or two. Closes ticket 31372.
3881 o Minor features (fallback directory list, backport from 0.4.1.4-rc):
3882 - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc
3883 in December 2018 (of which ~122 were still functional), with a
3884 list of 148 fallbacks (70 new, 78 existing, 79 removed) generated
3885 in June 2019. Closes ticket 28795.
3887 o Minor features (geoip, backport from 0.4.2.5):
3888 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
3889 Country database. Closes ticket 32685.
3891 o Minor features (NSS, diagnostic, backport from 0.4.0.4-rc):
3892 - Try to log an error from NSS (if there is any) and a more useful
3893 description of our situation if we are using NSS and a call to
3894 SSL_ExportKeyingMaterial() fails. Diagnostic for ticket 29241.
3896 o Minor features (stem tests, backport from 0.4.2.1-alpha):
3897 - Change "make test-stem" so it only runs the stem tests that use
3898 tor. This change makes test-stem faster and more reliable. Closes
3901 o Minor bugfixes (security, backport from 0.4.0.4-rc):
3902 - Verify in more places that we are not about to create a buffer
3903 with more than INT_MAX bytes, to avoid possible OOB access in the
3904 event of bugs. Fixes bug 30041; bugfix on 0.2.0.16. Found and
3905 fixed by Tobias Stoeckmann.
3906 - Fix a potential double free bug when reading huge bandwidth files.
3907 The issue is not exploitable in the current Tor network because
3908 the vulnerable code is only reached when directory authorities
3909 read bandwidth files, but bandwidth files come from a trusted
3910 source (usually the authorities themselves). Furthermore, the
3911 issue is only exploitable in rare (non-POSIX) 32-bit architectures,
3912 which are not used by any of the current authorities. Fixes bug
3913 30040; bugfix on 0.3.5.1-alpha. Bug found and fixed by
3916 o Minor bugfix (continuous integration, backport from 0.4.0.4-rc):
3917 - Reset coverage state on disk after Travis CI has finished. This
3918 should prevent future coverage merge errors from causing the test
3919 suite for the "process" subsystem to fail. The process subsystem
3920 was introduced in 0.4.0.1-alpha. Fixes bug 29036; bugfix
3922 - Terminate test-stem if it takes more than 9.5 minutes to run.
3923 (Travis terminates the job after 10 minutes of no output.)
3924 Diagnostic for 29437. Fixes bug 30011; bugfix on 0.3.5.4-alpha.
3926 o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha):
3927 - Avoid spurious errors when Appveyor CI fails before the install step.
3928 Fixes bug 31884; bugfix on 0.3.4.2-alpha.
3930 o Minor bugfixes (build system, backport form 0.4.2.1-alpha):
3931 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
3932 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
3934 o Minor bugfixes (C correctness, backport from 0.4.0.4-rc):
3935 - Fix an unlikely memory leak in consensus_diff_apply(). Fixes bug
3936 29824; bugfix on 0.3.1.1-alpha. This is Coverity warning
3939 o Minor bugfixes (circuit isolation, backport from 0.4.1.3-alpha):
3940 - Fix a logic error that prevented the SessionGroup sub-option from
3941 being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha.
3943 o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc):
3944 - Fix a BUG() assertion that occurs within a very small race window
3945 between when a client intro circuit opens and when its descriptor
3946 gets cleaned up from the cache. The circuit is now closed early,
3947 which will trigger a re-fetch of the descriptor and continue the
3948 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
3950 o Minor bugfixes (clock skew detection, backport from 0.4.1.5):
3951 - Don't believe clock skew results from NETINFO cells that appear to
3952 arrive before we sent the VERSIONS cells they are responding to.
3953 Previously, we would accept them up to 3 minutes "in the past".
3954 Fixes bug 31343; bugfix on 0.2.4.4-alpha.
3956 o Minor bugfixes (compilation warning, backport from 0.4.1.5):
3957 - Fix a compilation warning on Windows about casting a function
3958 pointer for GetTickCount64(). Fixes bug 31374; bugfix
3961 o Minor bugfixes (compilation, backport from 0.4.0.2-alpha):
3962 - Silence a compiler warning in test-memwipe.c on OpenBSD. Fixes bug
3963 29145; bugfix on 0.2.9.3-alpha. Patch from Kris Katterjohn.
3965 o Minor bugfixes (compilation, backport from 0.4.1.5):
3966 - Avoid using labs() on time_t, which can cause compilation warnings
3967 on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
3969 o Minor bugfixes (compilation, backport from 0.4.2.1-alpha):
3970 - Suppress spurious float-conversion warnings from GCC when calling
3971 floating-point classifier functions on FreeBSD. Fixes part of bug
3972 31687; bugfix on 0.3.1.5-alpha.
3974 o Minor bugfixes (compilation, unusual configurations, backport from 0.4.1.1-alpha):
3975 - Avoid failures when building with the ALL_BUGS_ARE_FATAL option
3976 due to missing declarations of abort(), and prevent other such
3977 failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.
3979 o Minor bugfixes (configuration, proxies, backport from 0.4.1.2-alpha):
3980 - Fix a bug that prevented us from supporting SOCKS5 proxies that
3981 want authentication along with configured (but unused!)
3982 ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.
3984 o Minor bugfixes (connections, backport from 0.4.2.3-rc):
3985 - Avoid trying to read data from closed connections, which can cause
3986 needless loops in Libevent and infinite loops in Shadow. Fixes bug
3987 30344; bugfix on 0.1.1.1-alpha.
3989 o Minor bugfixes (continuous integration, backport from 0.4.1.3-alpha):
3990 - Allow the test-stem job to fail in Travis, because it sometimes
3991 hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha.
3992 - Skip test_rebind on macOS in Travis, because it is unreliable on
3993 macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
3994 - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment
3995 variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
3997 o Minor bugfixes (crash on exit, backport from 0.4.1.4-rc):
3998 - Avoid a set of possible code paths that could try to use freed
3999 memory in routerlist_free() while Tor was exiting. Fixes bug
4000 31003; bugfix on 0.1.2.2-alpha.
4002 o Minor bugfixes (directory authorities, backport from 0.4.1.3-alpha):
4003 - Stop crashing after parsing an unknown descriptor purpose
4004 annotation. We think this bug can only be triggered by modifying a
4005 local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha.
4007 o Minor bugfixes (directory authority, backport from 0.4.1.2-alpha):
4008 - Move the "bandwidth-file-headers" line in directory authority
4009 votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix
4012 o Minor bugfixes (error handling, backport from 0.4.2.1-alpha):
4013 - On abort, try harder to flush the output buffers of log messages.
4014 On some platforms (macOS), log messages could be discarded when
4015 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
4016 - Report the tor version whenever an assertion fails. Previously, we
4017 only reported the Tor version on some crashes, and some non-fatal
4018 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
4020 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha):
4021 - When extracting an IPv6 address from a PF-based proxy, verify that
4022 we are actually configured to receive an IPv6 address, and log an
4023 internal error if not. Fixes part of bug 31687; bugfix
4026 o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
4027 - When tor is missing descriptors for some primary entry guards,
4028 make the log message less alarming. It's normal for descriptors to
4029 expire, as long as tor fetches new ones soon after. Fixes bug
4030 31657; bugfix on 0.3.3.1-alpha.
4032 o Minor bugfixes (logging, backport from 0.4.0.2-alpha):
4033 - Avoid logging that we are relaxing a circuit timeout when that
4034 timeout is fixed. Fixes bug 28698; bugfix on 0.2.4.7-alpha.
4036 o Minor bugfixes (logging, backport from 0.4.0.3-alpha):
4037 - Correct a misleading error message when IPv4Only or IPv6Only is
4038 used but the resolved address can not be interpreted as an address
4039 of the specified IP version. Fixes bug 13221; bugfix on
4040 0.2.3.9-alpha. Patch from Kris Katterjohn.
4041 - Log the correct port number for listening sockets when "auto" is
4042 used to let Tor pick the port number. Previously, port 0 was
4043 logged instead of the actual port number. Fixes bug 29144; bugfix
4044 on 0.3.5.1-alpha. Patch from Kris Katterjohn.
4045 - Stop logging a BUG() warning when Tor is waiting for exit
4046 descriptors. Fixes bug 28656; bugfix on 0.3.5.1-alpha.
4048 o Minor bugfixes (logging, backport from 0.4.1.1-alpha):
4049 - Do not log a warning when running with an OpenSSL version other
4050 than the one Tor was compiled with, if the two versions should be
4051 compatible. Previously, we would warn whenever the version was
4052 different. Fixes bug 30190; bugfix on 0.2.4.2-alpha.
4054 o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
4055 - Change log level of message "Hash of session info was not as
4056 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
4059 o Minor bugfixes (logging, backport from 0.4.2.2-alpha):
4060 - Rate-limit our the logging message about the obsolete .exit
4061 notation. Previously, there was no limit on this warning, which
4062 could potentially be triggered many times by a hostile website.
4063 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
4065 o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha):
4066 - Do not log a nonfatal assertion failure when receiving a VERSIONS
4067 cell on a connection using the obsolete v1 link protocol. Log a
4068 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
4070 o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha):
4071 - Reset the periodic events' "enabled" flag when Tor is shut down
4072 cleanly. Previously, this flag was left on, which caused periodic
4073 events not to be re-enabled when Tor was relaunched in-process
4074 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
4077 o Minor bugfixes (memory leak, backport from 0.4.1.1-alpha):
4078 - Avoid a minor memory leak that could occur on relays when failing
4079 to create a "keys" directory. Fixes bug 30148; bugfix
4082 o Minor bugfixes (memory leak, backport from 0.4.1.4-rc):
4083 - Fix a trivial memory leak when parsing an invalid value
4084 from a download schedule in the configuration. Fixes bug
4085 30894; bugfix on 0.3.4.1-alpha.
4087 o Minor bugfixes (memory management, backport from 0.4.0.3-alpha):
4088 - Refactor the shared random state's memory management so that it
4089 actually takes ownership of the shared random value pointers.
4090 Fixes bug 29706; bugfix on 0.2.9.1-alpha.
4092 o Minor bugfixes (memory management, testing, backport from 0.4.0.3-alpha):
4093 - Stop leaking parts of the shared random state in the shared-random
4094 unit tests. Fixes bug 29599; bugfix on 0.2.9.1-alpha.
4096 o Minor bugfixes (onion services, backport from 0.4.1.1-alpha):
4097 - Avoid a GCC 9.1.1 warning (and possible crash depending on libc
4098 implemenation) when failing to load an onion service client
4099 authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha.
4101 o Minor bugfixes (out-of-memory handler, backport from 0.4.1.2-alpha):
4102 - When purging the DNS cache because of an out-of-memory condition,
4103 try purging just the older entries at first. Previously, we would
4104 always purge the whole thing. Fixes bug 29617; bugfix
4107 o Minor bugfixes (portability, backport from 0.4.1.2-alpha):
4108 - Avoid crashing in our tor_vasprintf() implementation on systems
4109 that define neither vasprintf() nor _vscprintf(). (This bug has
4110 been here long enough that we question whether people are running
4111 Tor on such systems, but we're applying the fix out of caution.)
4112 Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by
4115 o Minor bugfixes (relay, backport from 0.4.2.2-alpha):
4116 - Avoid crashing when starting with a corrupt keys directory where
4117 the old ntor key and the new ntor key are identical. Fixes bug
4118 30916; bugfix on 0.2.4.8-alpha.
4120 o Minor bugfixes (rust, backport from 0.4.0.5):
4121 - Abort on panic in all build profiles, instead of potentially
4122 unwinding into C code. Fixes bug 27199; bugfix on 0.3.3.1-alpha.
4124 o Minor bugfixes (rust, backport from 0.4.2.1-alpha):
4125 - Correctly exclude a redundant rust build job in Travis. Fixes bug
4126 31463; bugfix on 0.3.5.4-alpha.
4128 o Minor bugfixes (single onion services, backport from 0.4.0.3-alpha):
4129 - Allow connections to single onion services to remain idle without
4130 being disconnected. Previously, relays acting as rendezvous points
4131 for single onion services were mistakenly closing idle rendezvous
4132 circuits after 60 seconds, thinking that they were unused
4133 directory-fetching circuits that had served their purpose. Fixes
4134 bug 29665; bugfix on 0.2.1.26.
4136 o Minor bugfixes (stats, backport from 0.4.0.3-alpha):
4137 - When ExtraInfoStatistics is 0, stop including PaddingStatistics in
4138 relay and bridge extra-info documents. Fixes bug 29017; bugfix
4141 o Minor bugfixes (testing, backport from 0.4.0.3-alpha):
4142 - Downgrade some LOG_ERR messages in the address/* tests to
4143 warnings. The LOG_ERR messages were occurring when we had no
4144 configured network. We were failing the unit tests, because we
4145 backported 28668 to 0.3.5.8, but did not backport 29530. Fixes bug
4146 29530; bugfix on 0.3.5.8.
4147 - Fix our gcov wrapper script to look for object files at the
4148 correct locations. Fixes bug 29435; bugfix on 0.3.5.1-alpha.
4150 o Minor bugfixes (testing, backport from 0.4.0.4-rc):
4151 - Backport the 0.3.4 src/test/test-network.sh to 0.2.9. We need a
4152 recent test-network.sh to use new chutney features in CI. Fixes
4153 bug 29703; bugfix on 0.2.9.1-alpha.
4154 - Fix a test failure on Windows caused by an unexpected "BUG"
4155 warning in our tests for tor_gmtime_r(-1). Fixes bug 29922; bugfix
4158 o Minor bugfixes (testing, backport from 0.4.2.3-alpha):
4159 - When testing port rebinding, don't busy-wait for tor to log.
4160 Instead, actually sleep for a short time before polling again.
4161 Also improve the formatting of control commands and log messages.
4162 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
4164 o Minor bugfixes (TLS protocol, backport form 0.4.0.4-rc):
4165 - When classifying a client's selection of TLS ciphers, if the
4166 client ciphers are not yet available, do not cache the result.
4167 Previously, we had cached the unavailability of the cipher list
4168 and never looked again, which in turn led us to assume that the
4169 client only supported the ancient V1 link protocol. This, in turn,
4170 was causing Stem integration tests to stall in some cases. Fixes
4171 bug 30021; bugfix on 0.2.4.8-alpha.
4173 o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha):
4174 - Log bugs about the TLS read buffer's length only once, rather than
4175 filling the logs with similar warnings. Fixes bug 31939; bugfix
4178 o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
4179 - Always retry v2 single onion service intro and rend circuits with
4180 a 3-hop path. Previously, v2 single onion services used a 3-hop
4181 path when rendezvous circuits were retried after a remote or
4182 delayed failure, but a 1-hop path for immediate retries. Fixes bug
4183 23818; bugfix on 0.2.9.3-alpha.
4184 - Make v3 single onion services fall back to a 3-hop intro, when all
4185 intro points are unreachable via a 1-hop path. Previously, v3
4186 single onion services failed when all intro nodes were unreachable
4187 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
4189 o Minor bugfixes (Windows, CI, backport from 0.4.0.3-alpha):
4190 - Skip the Appveyor 32-bit Windows Server 2016 job, and 64-bit
4191 Windows Server 2012 R2 job. The remaining 2 jobs still provide
4192 coverage of 64/32-bit, and Windows Server 2016/2012 R2. Also set
4193 fast_finish, so failed jobs terminate the build immediately. Fixes
4194 bug 29601; bugfix on 0.3.5.4-alpha.
4196 o Documentation (backport from 0.4.2.1-alpha):
4197 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
4198 notice.html so that operators no longer have to host it
4199 themselves. Closes ticket 31089.
4201 o Testing (backport from 0.4.1.2-alpha):
4202 - Specify torrc paths (with empty files) when launching tor in
4203 integration tests; refrain from reading user and system torrcs.
4204 Resolves issue 29702.
4206 o Testing (continuous integration, backport from 0.4.1.1-alpha):
4207 - In Travis, show stem's tor log after failure. Closes ticket 30234.
4209 o Testing (continuous integration, backport from 0.4.1.5):
4210 - In Travis, make stem log a controller trace to the console, and
4211 tail stem's tor log after failure. Closes ticket 30591.
4212 - In Travis, only run the stem tests that use a tor binary. Closes
4215 o Testing (continuous integration, backport from 0.4.2.3-alpha):
4216 - Disable all but one Travis CI macOS build, to mitigate slow
4217 scheduling of Travis macOS jobs. Closes ticket 32177.
4218 - Run the chutney IPv6 networks as part of Travis CI. Closes
4220 - Simplify the Travis CI build matrix, and optimise for build time.
4221 Closes ticket 31859.
4222 - Use Windows Server 2019 instead of Windows Server 2016 in our
4223 Appveyor builds. Closes ticket 32086.
4225 o Testing (continuous integration, backport from 0.4.2.4-rc):
4226 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
4227 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
4228 until we can fix some Bionic permissions issues (see ticket
4229 32240). Related to ticket 31919.
4230 - Install the mingw OpenSSL package in Appveyor. This makes sure
4231 that the OpenSSL headers and libraries match in Tor's Appveyor
4232 builds. (This bug was triggered by an Appveyor image update.)
4233 Fixes bug 32449; bugfix on 0.3.5.6-rc.
4234 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
4236 o Testing (continuous integration, backport from 0.4.2.5):
4237 - Require C99 standards-conforming code in Travis CI, but allow GNU gcc
4238 extensions. Also activates clang's -Wtypedef-redefinition warnings.
4239 Build some jobs with -std=gnu99, and some jobs without.
4240 Closes ticket 32500.
4242 Changes in version 0.4.2.4-rc - 2019-11-15
4243 Tor 0.4.2.4-rc is the first release candidate in its series. It fixes
4244 several bugs from earlier versions, including a few that would result in
4245 stack traces or incorrect behavior.
4247 o Minor features (build system):
4248 - Make pkg-config use --prefix when cross-compiling, if
4249 PKG_CONFIG_PATH is not set. Closes ticket 32191.
4251 o Minor features (geoip):
4252 - Update geoip and geoip6 to the November 6 2019 Maxmind GeoLite2
4253 Country database. Closes ticket 32440.
4255 o Minor bugfixes (client, onion service v3):
4256 - Fix a BUG() assertion that occurs within a very small race window
4257 between when a client intro circuit opens and when its descriptor
4258 gets cleaned up from the cache. The circuit is now closed early,
4259 which will trigger a re-fetch of the descriptor and continue the
4260 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
4262 o Minor bugfixes (code quality):
4263 - Fix "make check-includes" so it runs correctly on out-of-tree
4264 builds. Fixes bug 31335; bugfix on 0.3.5.1-alpha.
4266 o Minor bugfixes (configuration):
4267 - Log the option name when skipping an obsolete option. Fixes bug
4268 32295; bugfix on 0.4.2.1-alpha.
4270 o Minor bugfixes (crash):
4271 - When running Tor with an option like --verify-config or
4272 --dump-config that does not start the event loop, avoid crashing
4273 if we try to exit early because of an error. Fixes bug 32407;
4274 bugfix on 0.3.3.1-alpha.
4276 o Minor bugfixes (directory):
4277 - When checking if a directory connection is anonymous, test if the
4278 circuit was marked for close before looking at its channel. This
4279 avoids a BUG() stacktrace if the circuit was previously closed.
4280 Fixes bug 31958; bugfix on 0.4.2.1-alpha.
4282 o Minor bugfixes (shellcheck):
4283 - Fix minor shellcheck errors in the git-*.sh scripts. Fixes bug
4284 32402; bugfix on 0.4.2.1-alpha.
4285 - Start checking most scripts for shellcheck errors again. Fixes bug
4286 32402; bugfix on 0.4.2.1-alpha.
4288 o Testing (continuous integration):
4289 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
4290 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
4291 until we can fix some Bionic permissions issues (see ticket
4292 32240). Related to ticket 31919.
4293 - Install the mingw OpenSSL package in Appveyor. This makes sure
4294 that the OpenSSL headers and libraries match in Tor's Appveyor
4295 builds. (This bug was triggered by an Appveyor image update.)
4296 Fixes bug 32449; bugfix on 0.3.5.6-rc.
4297 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
4300 Changes in version 0.4.2.3-alpha - 2019-10-24
4301 This release fixes several bugs from the previous alpha release, and
4302 from earlier versions of Tor.
4304 o Major bugfixes (relay):
4305 - Relays now respect their AccountingMax bandwidth again. When
4306 relays entered "soft" hibernation (which typically starts when
4307 we've hit 90% of our AccountingMax), we had stopped checking
4308 whether we should enter hard hibernation. Soft hibernation refuses
4309 new connections and new circuits, but the existing circuits can
4310 continue, meaning that relays could have exceeded their configured
4311 AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.
4313 o Major bugfixes (v3 onion services):
4314 - Onion services now always use the exact number of intro points
4315 configured with the HiddenServiceNumIntroductionPoints option (or
4316 fewer if nodes are excluded). Before, a service could sometimes
4317 pick more intro points than configured. Fixes bug 31548; bugfix
4320 o Minor feature (onion services, control port):
4321 - The ADD_ONION command's keyword "BEST" now defaults to ED25519-V3
4322 (v3) onion services. Previously it defaulted to RSA1024 (v2).
4323 Closes ticket 29669.
4325 o Minor features (testing):
4326 - When running tests that attempt to look up hostnames, replace the
4327 libc name lookup functions with ones that do not actually touch
4328 the network. This way, the tests complete more quickly in the
4329 presence of a slow or missing DNS resolver. Closes ticket 31841.
4331 o Minor features (testing, continuous integration):
4332 - Disable all but one Travis CI macOS build, to mitigate slow
4333 scheduling of Travis macOS jobs. Closes ticket 32177.
4334 - Run the chutney IPv6 networks as part of Travis CI. Closes
4336 - Simplify the Travis CI build matrix, and optimise for build time.
4337 Closes ticket 31859.
4338 - Use Windows Server 2019 instead of Windows Server 2016 in our
4339 Appveyor builds. Closes ticket 32086.
4341 o Minor bugfixes (build system):
4342 - Interpret "--disable-module-dirauth=no" correctly. Fixes bug
4343 32124; bugfix on 0.3.4.1-alpha.
4344 - Interpret "--with-tcmalloc=no" correctly. Fixes bug 32124; bugfix
4346 - Stop failing when jemalloc is requested, but tcmalloc is not
4347 found. Fixes bug 32124; bugfix on 0.3.5.1-alpha.
4348 - When pkg-config is not installed, or a library that depends on
4349 pkg-config is not found, tell the user what to do to fix the
4350 problem. Fixes bug 31922; bugfix on 0.3.1.1-alpha.
4352 o Minor bugfixes (connections):
4353 - Avoid trying to read data from closed connections, which can cause
4354 needless loops in Libevent and infinite loops in Shadow. Fixes bug
4355 30344; bugfix on 0.1.1.1-alpha.
4357 o Minor bugfixes (error handling):
4358 - Always lock the backtrace buffer before it is used. Fixes bug
4359 31734; bugfix on 0.2.5.3-alpha.
4361 o Minor bugfixes (mainloop, periodic events, in-process API):
4362 - Reset the periodic events' "enabled" flag when Tor is shut down
4363 cleanly. Previously, this flag was left on, which caused periodic
4364 events not to be re-enabled when Tor was relaunched in-process
4365 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
4368 o Minor bugfixes (process management):
4369 - Remove overly strict assertions that triggered when a pluggable
4370 transport failed to launch. Fixes bug 31091; bugfix
4372 - Remove an assertion in the Unix process backend. This assertion
4373 would trigger when we failed to find the executable for a child
4374 process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.
4376 o Minor bugfixes (testing):
4377 - Avoid intermittent test failures due to a test that had relied on
4378 inconsistent timing sources. Fixes bug 31995; bugfix
4380 - When testing port rebinding, don't busy-wait for tor to log.
4381 Instead, actually sleep for a short time before polling again.
4382 Also improve the formatting of control commands and log messages.
4383 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
4385 o Minor bugfixes (tls, logging):
4386 - Log bugs about the TLS read buffer's length only once, rather than
4387 filling the logs with similar warnings. Fixes bug 31939; bugfix
4390 o Minor bugfixes (v3 onion services):
4391 - Fix an implicit conversion from ssize_t to size_t discovered by
4392 Coverity. Fixes bug 31682; bugfix on 0.4.2.1-alpha.
4393 - Fix a memory leak in an unlikely error code path when encoding HS
4394 DoS establish intro extension cell. Fixes bug 32063; bugfix
4396 - When cleaning up intro circuits for a v3 onion service, don't
4397 remove circuits that have an established or pending circuit, even
4398 if they ran out of retries. This way, we don't remove a circuit on
4399 its last retry. Fixes bug 31652; bugfix on 0.3.2.1-alpha.
4402 - Correct the description of "GuardLifetime". Fixes bug 31189;
4403 bugfix on 0.3.0.1-alpha.
4404 - Make clear in the man page, in both the bandwidth section and the
4405 AccountingMax section, that Tor counts in powers of two, not
4406 powers of ten: 1 GByte is 1024*1024*1024 bytes, not one billion
4407 bytes. Resolves ticket 32106.
4410 Changes in version 0.4.2.2-alpha - 2019-10-07
4411 This release fixes several bugs from the previous alpha release, and
4412 from earlier versions. It also includes a change in authorities, so
4413 that they begin to reject the currently unsupported release series.
4415 o Major features (directory authorities):
4416 - Directory authorities now reject relays running all currently
4417 deprecated release series. The currently supported release series
4418 are: 0.2.9, 0.3.5, 0.4.0, 0.4.1, and 0.4.2. Closes ticket 31549.
4420 o Major bugfixes (embedded Tor):
4421 - Avoid a possible crash when restarting Tor in embedded mode and
4422 enabling a different set of publish/subscribe messages. Fixes bug
4423 31898; bugfix on 0.4.1.1-alpha.
4425 o Major bugfixes (torrc parsing):
4426 - Stop ignoring torrc options after an %include directive, when the
4427 included directory ends with a file that does not contain any
4428 config options (but does contain comments or whitespace). Fixes
4429 bug 31408; bugfix on 0.3.1.1-alpha.
4431 o Minor features (auto-formatting scripts):
4432 - When annotating C macros, never generate a line that our check-
4433 spaces script would reject. Closes ticket 31759.
4434 - When annotating C macros, try to remove cases of double-negation.
4435 Closes ticket 31779.
4437 o Minor features (continuous integration):
4438 - When building on Appveyor and Travis, pass the "-k" flag to make,
4439 so that we are informed of all compilation failures, not just the
4440 first one or two. Closes ticket 31372.
4442 o Minor features (geoip):
4443 - Update geoip and geoip6 to the October 1 2019 Maxmind GeoLite2
4444 Country database. Closes ticket 31931.
4446 o Minor features (maintenance scripts):
4447 - Add a Coccinelle script to detect bugs caused by incrementing or
4448 decrementing a variable inside a call to log_debug(). Since
4449 log_debug() is a macro whose arguments are conditionally
4450 evaluated, it is usually an error to do this. One such bug was
4451 30628, in which SENDME cells were miscounted by a decrement
4452 operator inside a log_debug() call. Closes ticket 30743.
4454 o Minor features (onion services v3):
4455 - Assist users who try to setup v2 client authorization in v3 onion
4456 services by pointing them to the right documentation. Closes
4459 o Minor bugfixes (Appveyor continuous integration):
4460 - Avoid spurious errors when Appveyor CI fails before the install
4461 step. Fixes bug 31884; bugfix on 0.3.4.2-alpha.
4463 o Minor bugfixes (best practices tracker):
4464 - When listing overbroad exceptions, do not also list problems, and
4465 do not list insufficiently broad exceptions. Fixes bug 31338;
4466 bugfix on 0.4.2.1-alpha.
4468 o Minor bugfixes (controller protocol):
4469 - Fix the MAPADDRESS controller command to accept one or more
4470 arguments. Previously, it required two or more arguments, and
4471 ignored the first. Fixes bug 31772; bugfix on 0.4.1.1-alpha.
4473 o Minor bugfixes (logging):
4474 - Add a missing check for HAVE_PTHREAD_H, because the backtrace code
4475 uses mutexes. Fixes bug 31614; bugfix on 0.2.5.2-alpha.
4476 - Disable backtrace signal handlers when shutting down tor. Fixes
4477 bug 31614; bugfix on 0.2.5.2-alpha.
4478 - Rate-limit our the logging message about the obsolete .exit
4479 notation. Previously, there was no limit on this warning, which
4480 could potentially be triggered many times by a hostile website.
4481 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
4482 - When initialising log domain masks, only set known log domains.
4483 Fixes bug 31854; bugfix on 0.2.1.1-alpha.
4485 o Minor bugfixes (logging, protocol violations):
4486 - Do not log a nonfatal assertion failure when receiving a VERSIONS
4487 cell on a connection using the obsolete v1 link protocol. Log a
4488 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
4490 o Minor bugfixes (modules):
4491 - Explain what the optional Directory Authority module is, and what
4492 happens when it is disabled. Fixes bug 31825; bugfix
4495 o Minor bugfixes (multithreading):
4496 - Avoid some undefined behaviour when freeing mutexes. Fixes bug
4497 31736; bugfix on 0.0.7.
4499 o Minor bugfixes (relay):
4500 - Avoid crashing when starting with a corrupt keys directory where
4501 the old ntor key and the new ntor key are identical. Fixes bug
4502 30916; bugfix on 0.2.4.8-alpha.
4504 o Minor bugfixes (tests, SunOS):
4505 - Avoid a map_anon_nofork test failure due to a signed/unsigned
4506 integer comparison. Fixes bug 31897; bugfix on 0.4.1.1-alpha.
4508 o Code simplification and refactoring:
4509 - Refactor connection_control_process_inbuf() to reduce the size of
4510 a practracker exception. Closes ticket 31840.
4511 - Refactor the microdescs_parse_from_string() function into smaller
4512 pieces, for better comprehensibility. Closes ticket 31675.
4513 - Use SEVERITY_MASK_IDX() to find the LOG_* mask indexes in the unit
4514 tests and fuzzers, rather than using hard-coded values. Closes
4516 - Interface for function `decrypt_desc_layer` cleaned up. Closes
4520 - Document the signal-safe logging behaviour in the tor man page.
4521 Also add some comments to the relevant functions. Closes
4523 - Explain why we can't destroy the backtrace buffer mutex. Explain
4524 why we don't need to destroy the log mutex. Closes ticket 31736.
4525 - The Tor source code repository now includes a (somewhat dated)
4526 description of Tor's modular architecture, in doc/HACKING/design.
4527 This is based on the old "tor-guts.git" repository, which we are
4528 adopting and superseding. Closes ticket 31849.
4531 Changes in version 0.4.1.6 - 2019-09-19
4532 This release backports several bugfixes to improve stability and
4533 correctness. Anyone experiencing build problems or crashes with 0.4.1.5,
4534 or experiencing reliability issues with single onion services, should
4537 o Major bugfixes (crash, Linux, Android, backport from 0.4.2.1-alpha):
4538 - Tolerate systems (including some Android installations) where
4539 madvise and MADV_DONTDUMP are available at build-time, but not at
4540 run time. Previously, these systems would notice a failed syscall
4541 and abort. Fixes bug 31570; bugfix on 0.4.1.1-alpha.
4542 - Tolerate systems (including some Linux installations) where
4543 madvise and/or MADV_DONTFORK are available at build-time, but not
4544 at run time. Previously, these systems would notice a failed
4545 syscall and abort. Fixes bug 31696; bugfix on 0.4.1.1-alpha.
4547 o Minor features (stem tests, backport from 0.4.2.1-alpha):
4548 - Change "make test-stem" so it only runs the stem tests that use
4549 tor. This change makes test-stem faster and more reliable. Closes
4552 o Minor bugfixes (build system, backport form 0.4.2.1-alpha):
4553 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
4554 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
4556 o Minor bugfixes (compilation, backport from 0.4.2.1-alpha):
4557 - Add more stub functions to fix compilation on Android with link-
4558 time optimization when --disable-module-dirauth is used.
4559 Previously, these compilation settings would make the compiler
4560 look for functions that didn't exist. Fixes bug 31552; bugfix
4562 - Suppress spurious float-conversion warnings from GCC when calling
4563 floating-point classifier functions on FreeBSD. Fixes part of bug
4564 31687; bugfix on 0.3.1.5-alpha.
4566 o Minor bugfixes (controller protocol):
4567 - Fix the MAPADDRESS controller command to accept one or more
4568 arguments. Previously, it required two or more arguments, and ignored
4569 the first. Fixes bug 31772; bugfix on 0.4.1.1-alpha.
4571 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha):
4572 - When extracting an IPv6 address from a PF-based proxy, verify that
4573 we are actually configured to receive an IPv6 address, and log an
4574 internal error if not. Fixes part of bug 31687; bugfix
4577 o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
4578 - When tor is missing descriptors for some primary entry guards,
4579 make the log message less alarming. It's normal for descriptors to
4580 expire, as long as tor fetches new ones soon after. Fixes bug
4581 31657; bugfix on 0.3.3.1-alpha.
4583 o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
4584 - Change log level of message "Hash of session info was not as
4585 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
4588 o Minor bugfixes (rust, backport from 0.4.2.1-alpha):
4589 - Correctly exclude a redundant rust build job in Travis. Fixes bug
4590 31463; bugfix on 0.3.5.4-alpha.
4592 o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
4593 - Always retry v2 single onion service intro and rend circuits with
4594 a 3-hop path. Previously, v2 single onion services used a 3-hop
4595 path when rendezvous circuits were retried after a remote or
4596 delayed failure, but a 1-hop path for immediate retries. Fixes bug
4597 23818; bugfix on 0.2.9.3-alpha.
4599 o Minor bugfixes (v3 single onion services, backport from 0.4.2.1-alpha):
4600 - Always retry v3 single onion service intro and rend circuits with
4601 a 3-hop path. Previously, v3 single onion services used a 3-hop
4602 path when rend circuits were retried after a remote or delayed
4603 failure, but a 1-hop path for immediate retries. Fixes bug 23818;
4604 bugfix on 0.3.2.1-alpha.
4605 - Make v3 single onion services fall back to a 3-hop intro, when all
4606 intro points are unreachable via a 1-hop path. Previously, v3
4607 single onion services failed when all intro nodes were unreachable
4608 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
4610 o Documentation (backport from 0.4.2.1-alpha):
4611 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
4612 notice.html so that operators no longer have to host it
4613 themselves. Closes ticket 31089.
4616 Changes in version 0.4.2.1-alpha - 2019-09-17
4617 This is the first alpha release in the 0.4.2.x series. It adds new
4618 defenses for denial-of-service attacks against onion services. It also
4619 includes numerous kinds of bugfixes and refactoring to help improve
4620 Tor's stability and ease of development.
4622 o Major features (onion service v3, denial of service):
4623 - Add onion service introduction denial of service defenses. Intro
4624 points can now rate-limit client introduction requests, using
4625 parameters that can be sent by the service within the
4626 ESTABLISH_INTRO cell. If the cell extension for this is not used,
4627 the intro point will honor the consensus parameters. Closes
4630 o Major bugfixes (circuit build, guard):
4631 - When considering upgrading circuits from "waiting for guard" to
4632 "open", always ignore circuits that are marked for close.
4633 Previously we could end up in the situation where a subsystem is
4634 notified of a circuit opening, but the circuit is still marked for
4635 close, leading to undesirable behavior. Fixes bug 30871; bugfix
4638 o Major bugfixes (crash, Linux, Android):
4639 - Tolerate systems (including some Android installations) where
4640 madvise and MADV_DONTDUMP are available at build-time, but not at
4641 run time. Previously, these systems would notice a failed syscall
4642 and abort. Fixes bug 31570; bugfix on 0.4.1.1-alpha.
4643 - Tolerate systems (including some Linux installations) where
4644 madvise and/or MADV_DONTFORK are available at build-time, but not
4645 at run time. Previously, these systems would notice a failed
4646 syscall and abort. Fixes bug 31696; bugfix on 0.4.1.1-alpha.
4648 o Minor features (best practices tracker):
4649 - Our best-practices tracker now integrates with our include-checker
4650 tool to keep track of how many layering violations we have not yet
4651 fixed. We hope to reduce this number over time to improve Tor's
4652 modularity. Closes ticket 31176.
4653 - Add a TOR_PRACTRACKER_OPTIONS variable for passing arguments to
4654 practracker from the environment. We may want this for continuous
4655 integration. Closes ticket 31309.
4656 - Give a warning rather than an error when a practracker exception
4657 is violated by a small amount, add a --list-overbroad option to
4658 practracker that lists exceptions that are stricter than they need
4659 to be, and provide an environment variable for disabling
4660 practracker. Closes ticket 30752.
4661 - Our best-practices tracker now looks at headers as well as C
4662 files. Closes ticket 31175.
4664 o Minor features (build system):
4665 - Add --disable-manpage and --disable-html-manual options to
4666 configure script. This will enable shortening build times by not
4667 building documentation. Resolves issue 19381.
4669 o Minor features (compilation):
4670 - Log a more useful error message when we are compiling and one of
4671 the compile-time hardening options we have selected can be linked
4672 but not executed. Closes ticket 27530.
4674 o Minor features (configuration):
4675 - The configuration code has been extended to allow splitting
4676 configuration data across multiple objects. Previously, all
4677 configuration data needed to be kept in a single object, which
4678 tended to become bloated. Closes ticket 31240.
4680 o Minor features (continuous integration):
4681 - When running CI builds on Travis, put some random data in
4682 ~/.torrc, to make sure no tests are reading the Tor configuration
4683 file from its default location. Resolves issue 30102.
4685 o Minor features (debugging):
4686 - Log a nonfatal assertion failure if we encounter a configuration
4687 line whose command is "CLEAR" but which has a nonempty value. This
4688 should be impossible, according to the rules of our configuration
4689 line parsing. Closes ticket 31529.
4691 o Minor features (git hooks):
4692 - Our pre-commit git hook now checks for a special file before
4693 running practracker, so that practracker only runs on branches
4694 that are based on master. Since the pre-push hook calls the pre-
4695 commit hook, practracker will also only run before pushes of
4696 branches based on master. Closes ticket 30979.
4698 o Minor features (git scripts):
4699 - Add a "--" command-line argument, to separate git-push-all.sh
4700 script arguments from arguments that are passed through to git
4701 push. Closes ticket 31314.
4702 - Add a -r <remote-name> argument to git-push-all.sh, so the script
4703 can push test branches to a personal remote. Closes ticket 31314.
4704 - Add a -t <test-branch-prefix> argument to git-merge-forward.sh and
4705 git-push-all.sh, which makes these scripts create, merge forward,
4706 and push test branches. Closes ticket 31314.
4707 - Add a -u argument to git-merge-forward.sh, so that the script can
4708 re-use existing test branches after a merge failure and fix.
4709 Closes ticket 31314.
4710 - Add a TOR_GIT_PUSH env var, which sets the default git push
4711 command and arguments for git-push-all.sh. Closes ticket 31314.
4712 - Add a TOR_PUSH_DELAY variable to git-push-all.sh, which makes the
4713 script push master and maint branches with a delay between each
4714 branch. These delays trigger the CI jobs in a set order, which
4715 should show the most likely failures first. Also make pushes
4716 atomic by default, and make the script pass any command-line
4717 arguments to git push. Closes ticket 29879.
4718 - Call the shellcheck script from the pre-commit hook. Closes
4720 - Skip pushing test branches that are the same as a remote
4721 maint/release/master branch in git-push-all.sh by default. Add a
4722 -s argument, so git-push-all.sh can push all test branches. Closes
4725 o Minor features (IPv6, logging):
4726 - Log IPv6 addresses as well as IPv4 addresses when describing
4727 routerinfos, routerstatuses, and nodes. Closes ticket 21003.
4729 o Minor features (onion service v3):
4730 - Do not allow single hop clients to fetch or post an HS descriptor
4731 from an HSDir. Closes ticket 24964.
4733 o Minor features (onion service):
4734 - Disallow single-hop clients at the introduction point. We've
4735 removed Tor2web support a while back and single-hop rendezvous
4736 attempts are blocked at the relays. This change should remove load
4737 off the network from spammy clients. Close ticket 24963.
4739 o Minor features (stem tests):
4740 - Change "make test-stem" so it only runs the stem tests that use
4741 tor. This change makes test-stem faster and more reliable. Closes
4744 o Minor features (testing):
4745 - Add a script to invoke "tor --dump-config" and "tor
4746 --verify-config" with various configuration options, and see
4747 whether tor's resulting configuration or error messages are what
4748 we expect. Use it for integration testing of our +Option and
4749 /Option flags. Closes ticket 31637.
4750 - Improve test coverage for our existing configuration parsing and
4751 management API. Closes ticket 30893.
4752 - Add integration tests to make sure that practracker gives the
4753 outputs we expect. Closes ticket 31477.
4754 - The practracker self-tests are now run as part of the Tor test
4755 suite. Closes ticket 31304.
4757 o Minor features (token bucket):
4758 - Implement a generic token bucket that uses a single counter, for
4759 use in anti-DoS onion service work. Closes ticket 30687.
4761 o Minor bugfixes (best practices tracker):
4762 - Fix a few issues in the best-practices script, including tests,
4763 tab tolerance, error reporting, and directory-exclusion logic.
4764 Fixes bug 29746; bugfix on 0.4.1.1-alpha.
4765 - When running check-best-practices, only consider files in the src
4766 subdirectory. Previously we had recursively considered all
4767 subdirectories, which made us get confused by the temporary
4768 directories made by "make distcheck". Fixes bug 31578; bugfix
4771 o Minor bugfixes (build system):
4772 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
4773 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
4775 o Minor bugfixes (chutney, makefiles, documentation):
4776 - "make test-network-all" now shows the warnings from each test-
4777 network.sh run on the console, so developers see new warnings
4778 early. We've also improved the documentation for this feature, and
4779 renamed a Makefile variable so the code is self-documenting. Fixes
4780 bug 30455; bugfix on 0.3.0.4-rc.
4782 o Minor bugfixes (compilation):
4783 - Add more stub functions to fix compilation on Android with link-
4784 time optimization when --disable-module-dirauth is used.
4785 Previously, these compilation settings would make the compiler
4786 look for functions that didn't exist. Fixes bug 31552; bugfix
4788 - Suppress spurious float-conversion warnings from GCC when calling
4789 floating-point classifier functions on FreeBSD. Fixes part of bug
4790 31687; bugfix on 0.3.1.5-alpha.
4792 o Minor bugfixes (configuration):
4793 - Invalid floating-point values in the configuration file are now
4794 treated as errors in the configuration. Previously, they were
4795 ignored and treated as zero. Fixes bug 31475; bugfix on 0.0.1.
4797 o Minor bugfixes (coverity):
4798 - Add an assertion when parsing a BEGIN cell so that coverity can be
4799 sure that we are not about to dereference a NULL address. Fixes
4800 bug 31026; bugfix on 0.2.4.7-alpha. This is CID 1447296.
4801 - In our siphash implementation, when building for coverity, use
4802 memcpy in place of a switch statement, so that coverity can tell
4803 we are not accessing out-of-bounds memory. Fixes bug 31025; bugfix
4804 on 0.2.8.1-alpha. This is tracked as CID 1447293 and 1447295.
4805 - Fix several coverity warnings from our unit tests. Fixes bug
4806 31030; bugfix on 0.2.4.1-alpha, 0.3.2.1-alpha, and 0.4.0.1-alpha.
4808 o Minor bugfixes (developer tooling):
4809 - Only log git script changes in the post-merge script when the
4810 merge was to the master branch. Fixes bug 31040; bugfix
4813 o Minor bugfixes (directory authorities):
4814 - Return a distinct status when formatting annotations fails. Fixes
4815 bug 30780; bugfix on 0.2.0.8-alpha.
4817 o Minor bugfixes (error handling):
4818 - On abort, try harder to flush the output buffers of log messages.
4819 On some platforms (macOS), log messages could be discarded when
4820 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
4821 - Report the tor version whenever an assertion fails. Previously, we
4822 only reported the Tor version on some crashes, and some non-fatal
4823 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
4824 - When tor aborts due to an error, close log file descriptors before
4825 aborting. Closing the logs makes some OSes flush log file buffers,
4826 rather than deleting buffered log lines. Fixes bug 31594; bugfix
4829 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6):
4830 - When extracting an IPv6 address from a PF-based proxy, verify that
4831 we are actually configured to receive an IPv6 address, and log an
4832 internal error if not. Fixes part of bug 31687; bugfix
4835 o Minor bugfixes (git hooks):
4836 - Remove a duplicate call to practracker from the pre-push hook. The
4837 pre-push hook already calls the pre-commit hook, which calls
4838 practracker. Fixes bug 31462; bugfix on 0.4.1.1-alpha.
4840 o Minor bugfixes (git scripts):
4841 - Stop hard-coding the bash path in the git scripts. Some OSes don't
4842 have bash in /usr/bin, others have an ancient bash at this path.
4843 Fixes bug 30840; bugfix on 0.4.0.1-alpha.
4844 - Stop hard-coding the tor master branch name and worktree path in
4845 the git scripts. Fixes bug 30841; bugfix on 0.4.0.1-alpha.
4846 - Allow git-push-all.sh to be run from any directory. Previously,
4847 the script only worked if run from an upstream worktree directory.
4848 Closes ticket 31678.
4850 o Minor bugfixes (guards):
4851 - When tor is missing descriptors for some primary entry guards,
4852 make the log message less alarming. It's normal for descriptors to
4853 expire, as long as tor fetches new ones soon after. Fixes bug
4854 31657; bugfix on 0.3.3.1-alpha.
4856 o Minor bugfixes (ipv6):
4857 - Check for private IPv6 addresses alongside their IPv4 equivalents
4858 when authorities check descriptors. Previously, we only checked
4859 for private IPv4 addresses. Fixes bug 31088; bugfix on
4860 0.2.3.21-rc. Patch by Neel Chauhan.
4861 - When parsing microdescriptors, we should check the IPv6 exit
4862 policy alongside IPv4. Previously, we checked both exit policies
4863 for only router info structures, while microdescriptors were
4864 IPv4-only. Fixes bug 27284; bugfix on 0.2.3.1-alpha. Patch by
4867 o Minor bugfixes (logging):
4868 - Change log level of message "Hash of session info was not as
4869 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
4871 - Fix a code issue that would have broken our parsing of log domains
4872 as soon as we had 33 of them. Fortunately, we still only have 29.
4873 Fixes bug 31451; bugfix on 0.4.1.4-rc.
4875 o Minor bugfixes (memory management):
4876 - Stop leaking a small amount of memory in nt_service_install(), in
4877 unreachable code. Fixes bug 30799; bugfix on 0.2.0.7-alpha. Patch
4880 o Minor bugfixes (networking, IP addresses):
4881 - When parsing addresses via Tor's internal DNS lookup API, reject
4882 IPv4 addresses in square brackets, and accept IPv6 addresses in
4883 square brackets. This change completes the work started in 23082,
4884 making address parsing consistent between tor's internal DNS
4885 lookup and address parsing APIs. Fixes bug 30721; bugfix
4887 - When parsing addresses via Tor's internal address:port parsing and
4888 DNS lookup APIs, require IPv6 addresses with ports to have square
4889 brackets. But allow IPv6 addresses without ports, whether or not
4890 they have square brackets. Fixes bug 30721; bugfix
4893 o Minor bugfixes (onion service v3):
4894 - When purging the client descriptor cache, close any introduction
4895 point circuits associated with purged cache entries. This avoids
4896 picking those circuits later when connecting to the same
4897 introduction points. Fixes bug 30921; bugfix on 0.3.2.1-alpha.
4899 o Minor bugfixes (onion services):
4900 - In the hs_ident_circuit_t data structure, remove the unused field
4901 circuit_type and the respective argument in hs_ident_circuit_new().
4902 This field was set by clients (for introduction) and services (for
4903 introduction and rendezvous) but was never used afterwards. Fixes
4904 bug 31490; bugfix on 0.3.2.1-alpha. Patch by Neel Chauhan.
4906 o Minor bugfixes (operator tools):
4907 - Make tor-print-ed-signing-cert(1) print certificate expiration
4908 date in RFC 1123 and UNIX timestamp formats, to make output
4909 machine readable. Fixes bug 31012; bugfix on 0.3.5.1-alpha.
4911 o Minor bugfixes (rust):
4912 - Correctly exclude a redundant rust build job in Travis. Fixes bug
4913 31463; bugfix on 0.3.5.4-alpha.
4914 - Raise the minimum rustc version to 1.31.0, as checked by configure
4915 and CI. Fixes bug 31442; bugfix on 0.3.5.4-alpha.
4917 o Minor bugfixes (sendme, code structure):
4918 - Rename the trunnel SENDME file definition from sendme.trunnel to
4919 sendme_cell.trunnel to avoid having twice sendme.{c|h} in the
4920 repository. Fixes bug 30769; bugfix on 0.4.1.1-alpha.
4922 o Minor bugfixes (statistics):
4923 - Stop removing the ed25519 signature if the extra info file is too
4924 big. If the signature data was removed, but the keyword was kept,
4925 this could result in an unparseable extra info file. Fixes bug
4926 30958; bugfix on 0.2.7.2-alpha.
4928 o Minor bugfixes (subsystems):
4929 - Make the subsystem init order match the subsystem module
4930 dependencies. Call windows process security APIs as early as
4931 possible. Initialize logging before network and time, so that
4932 network and time can use logging. Fixes bug 31615; bugfix
4935 o Minor bugfixes (testing):
4936 - Teach the util/socketpair_ersatz test to work correctly when we
4937 have no network stack configured. Fixes bug 30804; bugfix
4940 o Minor bugfixes (v2 single onion services):
4941 - Always retry v2 single onion service intro and rend circuits with
4942 a 3-hop path. Previously, v2 single onion services used a 3-hop
4943 path when rendezvous circuits were retried after a remote or
4944 delayed failure, but a 1-hop path for immediate retries. Fixes bug
4945 23818; bugfix on 0.2.9.3-alpha.
4947 o Minor bugfixes (v3 single onion services):
4948 - Always retry v3 single onion service intro and rend circuits with
4949 a 3-hop path. Previously, v3 single onion services used a 3-hop
4950 path when rend circuits were retried after a remote or delayed
4951 failure, but a 1-hop path for immediate retries. Fixes bug 23818;
4952 bugfix on 0.3.2.1-alpha.
4953 - Make v3 single onion services fall back to a 3-hop intro, when all
4954 intro points are unreachable via a 1-hop path. Previously, v3
4955 single onion services failed when all intro nodes were unreachable
4956 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
4959 - Improve documentation in circuit padding subsystem. Patch by
4960 Tobias Pulls. Closes ticket 31113.
4961 - Include an example usage for IPv6 ORPort in our sample torrc.
4962 Closes ticket 31320; patch from Ali Raheem.
4963 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
4964 notice.html so that operators no longer have to host it
4965 themselves. Closes ticket 31089.
4968 - No longer include recommended package digests in votes as detailed
4969 in proposal 301. The RecommendedPackages torrc option is
4970 deprecated and will no longer have any effect. "package" lines
4971 will still be considered when computing consensuses for consensus
4972 methods that include them. (This change has no effect on the list
4973 of recommended Tor versions, which is still in use.) Closes
4975 - Remove torctl.in from contrib/dist directory. Resolves
4979 - Run shellcheck for all non-third-party shell scripts that are
4980 shipped with Tor. Closes ticket 29533.
4981 - When checking shell scripts, ignore any user-created directories.
4982 Closes ticket 30967.
4984 o Code simplification and refactoring (config handling):
4985 - Extract our variable manipulation code from confparse.c to a new
4986 lower-level typedvar.h module. Closes ticket 30864.
4987 - Lower another layer of object management from confparse.c to a
4988 more general tool. Now typed structure members are accessible via
4989 an abstract type. Implements ticket 30914.
4990 - Move our backend logic for working with configuration and state
4991 files into a lower-level library, since it no longer depends on
4992 any tor-specific functionality. Closes ticket 31626.
4993 - Numerous simplifications in configuration-handling logic: remove
4994 duplicated macro definitions, replace magical names with flags,
4995 and refactor "TestingTorNetwork" to use the same default-option
4996 logic as the rest of Tor. Closes ticket 30935.
4997 - Replace our ad-hoc set of flags for configuration variables and
4998 configuration variable types with fine-grained orthogonal flags
4999 corresponding to the actual behavior we want. Closes ticket 31625.
5001 o Code simplification and refactoring (misc):
5002 - Eliminate some uses of lower-level control reply abstractions,
5003 primarily in the onion_helper functions. Closes ticket 30889.
5004 - Rework bootstrap tracking to use the new publish-subscribe
5005 subsystem. Closes ticket 29976.
5006 - Rewrite format_node_description() and router_get_verbose_nickname()
5007 to use strlcpy() and strlcat(). The previous implementation used
5008 memcpy() and pointer arithmetic, which was error-prone. Closes
5009 ticket 31545. This is CID 1452819.
5010 - Split extrainfo_dump_to_string() into smaller functions. Closes
5012 - Use the ptrdiff_t type consistently for expressing variable
5013 offsets and pointer differences. Previously we incorrectly (but
5014 harmlessly) used int and sometimes off_t for these cases. Closes
5016 - Use the subsystems mechanism to manage the main event loop code.
5017 Closes ticket 30806.
5018 - Various simplifications and minor improvements to the circuit
5019 padding machines. Patch by Tobias Pulls. Closes tickets 31112
5022 o Documentation (hard-coded directories):
5023 - Improve the documentation for the DirAuthority and FallbackDir
5024 torrc options. Closes ticket 30955.
5026 o Documentation (tor.1 man page):
5027 - Fix typo in tor.1 man page: the option is "--help", not "-help".
5028 Fixes bug 31008; bugfix on 0.2.2.9-alpha.
5031 Changes in version 0.4.1.5 - 2019-08-20
5032 This is the first stable release in the 0.4.1.x series. This series
5033 adds experimental circuit-level padding, authenticated SENDME cells to
5034 defend against certain attacks, and several performance improvements
5035 to save on CPU consumption. It fixes bugs in bootstrapping and v3
5036 onion services. It also includes numerous smaller features and
5037 bugfixes on earlier versions.
5039 Per our support policy, we will support the 0.4.1.x series for nine
5040 months, or until three months after the release of a stable 0.4.2.x:
5041 whichever is longer. If you need longer-term support, please stick
5042 with 0.3.5.x, which will we plan to support until Feb 2022.
5044 Below are the changes since 0.4.1.4-rc. For a complete list of changes
5045 since 0.4.0.5, see the ReleaseNotes file.
5047 o Directory authority changes:
5048 - The directory authority "dizum" has a new IP address. Closes
5051 o Minor features (circuit padding logging):
5052 - Demote noisy client-side warn logs about circuit padding to
5053 protocol warnings. Add additional log messages and circuit ID
5054 fields to help with bug 30992 and any other future issues.
5056 o Minor bugfixes (circuit padding negotiation):
5057 - Bump the circuit padding protocol version to explicitly signify
5058 that the HS setup machine support is finalized in 0.4.1.x-stable.
5059 This also means that 0.4.1.x-alpha clients will not negotiate
5060 padding with 0.4.1.x-stable relays, and 0.4.1.x-stable clients
5061 will not negotiate padding with 0.4.1.x-alpha relays (or 0.4.0.x
5062 relays). Fixes bug 31356; bugfix on 0.4.1.1-alpha.
5064 o Minor bugfixes (circuit padding):
5065 - Ignore non-padding cells on padding circuits. This addresses
5066 various warning messages from subsystems that were not expecting
5067 padding circuits. Fixes bug 30942; bugfix on 0.4.1.1-alpha.
5069 o Minor bugfixes (clock skew detection):
5070 - Don't believe clock skew results from NETINFO cells that appear to
5071 arrive before we sent the VERSIONS cells they are responding to.
5072 Previously, we would accept them up to 3 minutes "in the past".
5073 Fixes bug 31343; bugfix on 0.2.4.4-alpha.
5075 o Minor bugfixes (compatibility, standards compliance):
5076 - Fix a bug that would invoke undefined behavior on certain
5077 operating systems when trying to asprintf() a string exactly
5078 INT_MAX bytes long. We don't believe this is exploitable, but it's
5079 better to fix it anyway. Fixes bug 31001; bugfix on 0.2.2.11-alpha.
5080 Found and fixed by Tobias Stoeckmann.
5082 o Minor bugfixes (compilation warning):
5083 - Fix a compilation warning on Windows about casting a function
5084 pointer for GetTickCount64(). Fixes bug 31374; bugfix
5087 o Minor bugfixes (compilation):
5088 - Avoid using labs() on time_t, which can cause compilation warnings
5089 on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
5091 o Minor bugfixes (distribution):
5092 - Do not ship any temporary files found in the
5093 scripts/maint/practracker directory. Fixes bug 31311; bugfix
5096 o Testing (continuous integration):
5097 - In Travis, make stem log a controller trace to the console, and
5098 tail stem's tor log after failure. Closes ticket 30591.
5099 - In Travis, only run the stem tests that use a tor binary. Closes
5103 Changes in version 0.4.1.4-rc - 2019-07-25
5104 Tor 0.4.1.4-rc fixes a few bugs from previous versions of Tor, and
5105 updates to a new list of fallback directories. If no new bugs are
5106 found, the next release in the 0.4.1.x serious should be stable.
5108 o Major bugfixes (circuit build, guard):
5109 - When considering upgrading circuits from "waiting for guard" to
5110 "open", always ignore circuits that are marked for close. Otherwise,
5111 we can end up in the situation where a subsystem is notified that
5112 a closing circuit has just opened, leading to undesirable
5113 behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha.
5115 o Minor features (continuous integration):
5116 - Our Travis configuration now uses Chutney to run some network
5117 integration tests automatically. Closes ticket 29280.
5119 o Minor features (fallback directory list):
5120 - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc
5121 in December 2018 (of which ~122 were still functional), with a
5122 list of 148 fallbacks (70 new, 78 existing, 79 removed) generated
5123 in June 2019. Closes ticket 28795.
5125 o Minor bugfixes (circuit padding):
5126 - On relays, properly check that a padding machine is absent before
5127 logging a warning about it being absent. Fixes bug 30649; bugfix
5129 - Add two NULL checks in unreachable places to silence Coverity (CID
5130 144729 and 1447291) and better future-proof ourselves. Fixes bug
5131 31024; bugfix on 0.4.1.1-alpha.
5133 o Minor bugfixes (crash on exit):
5134 - Avoid a set of possible code paths that could try to use freed
5135 memory in routerlist_free() while Tor was exiting. Fixes bug
5136 31003; bugfix on 0.1.2.2-alpha.
5138 o Minor bugfixes (logging):
5139 - Fix a conflict between the flag used for messaging-domain log
5140 messages, and the LD_NO_MOCK testing flag. Fixes bug 31080; bugfix
5143 o Minor bugfixes (memory leaks):
5144 - Fix a trivial memory leak when parsing an invalid value from a
5145 download schedule in the configuration. Fixes bug 30894; bugfix
5148 o Code simplification and refactoring:
5149 - Remove some dead code from circpad_machine_remove_token() to fix
5150 some Coverity warnings (CID 1447298). Fixes bug 31027; bugfix
5154 Changes in version 0.4.1.3-alpha - 2019-06-25
5155 Tor 0.4.1.3-alpha resolves numerous bugs left over from the previous
5156 alpha, most of them from earlier release series.
5158 o Major bugfixes (Onion service reachability):
5159 - Properly clean up the introduction point map when circuits change
5160 purpose from onion service circuits to pathbias, measurement, or
5161 other circuit types. This should fix some service-side instances
5162 of introduction point failure. Fixes bug 29034; bugfix
5165 o Minor features (geoip):
5166 - Update geoip and geoip6 to the June 10 2019 Maxmind GeoLite2
5167 Country database. Closes ticket 30852.
5169 o Minor features (logging):
5170 - Give a more useful assertion failure message if we think we have
5171 minherit() but we fail to make a region non-inheritable. Give a
5172 compile-time warning if our support for minherit() is incomplete.
5173 Closes ticket 30686.
5175 o Minor bugfixes (circuit isolation):
5176 - Fix a logic error that prevented the SessionGroup sub-option from
5177 being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha.
5179 o Minor bugfixes (continuous integration):
5180 - Allow the test-stem job to fail in Travis, because it sometimes
5181 hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha.
5182 - Skip test_rebind on macOS in Travis, because it is unreliable on
5183 macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
5184 - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment
5185 variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
5187 o Minor bugfixes (directory authorities):
5188 - Stop crashing after parsing an unknown descriptor purpose
5189 annotation. We think this bug can only be triggered by modifying a
5190 local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha.
5192 o Minor bugfixes (pluggable transports):
5193 - When running as a bridge with pluggable transports, always publish
5194 pluggable transport information in our extrainfo descriptor, even
5195 if ExtraInfoStatistics is 0. This information is needed by
5196 BridgeDB. Fixes bug 30956; bugfix on 0.4.1.1-alpha.
5199 - Mention URLs for Travis/Appveyor/Jenkins in ReleasingTor.md.
5200 Closes ticket 30630.
5203 Changes in version 0.4.1.2-alpha - 2019-06-06
5204 Tor 0.4.1.2-alpha resolves numerous bugs--some of them from the
5205 previous alpha, and some much older. It also contains minor testing
5206 improvements, and an improvement to the security of our authenticated
5207 SENDME implementation.
5209 o Major bugfixes (bridges):
5210 - Consider our directory information to have changed when our list
5211 of bridges changes. Previously, Tor would not re-compute the
5212 status of its directory information when bridges changed, and
5213 therefore would not realize that it was no longer able to build
5214 circuits. Fixes part of bug 29875.
5215 - Do not count previously configured working bridges towards our
5216 total of working bridges. Previously, when Tor's list of bridges
5217 changed, it would think that the old bridges were still usable,
5218 and delay fetching router descriptors for the new ones. Fixes part
5219 of bug 29875; bugfix on 0.3.0.1-alpha.
5221 o Major bugfixes (flow control, SENDME):
5222 - Decrement the stream-level package window after packaging a cell.
5223 Previously, it was done inside a log_debug() call, meaning that if
5224 debug logs were not enabled, the decrement would never happen, and
5225 thus the window would be out of sync with the other end point.
5226 Fixes bug 30628; bugfix on 0.4.1.1-alpha.
5228 o Major bugfixes (onion service reachability):
5229 - Properly clean up the introduction point map and associated state
5230 when circuits change purpose from onion service circuits to
5231 pathbias, measurement, or other circuit types. This may fix some
5232 instances of introduction point failure. Fixes bug 29034; bugfix
5235 o Minor features (authenticated SENDME):
5236 - Ensure that there is enough randomness on every circuit to prevent
5237 an attacker from successfully predicting the hashes they will need
5238 to include in authenticated SENDME cells. At a random interval, if
5239 we have not sent randomness already, we now leave some extra space
5240 at the end of a cell that we can fill with random bytes. Closes
5243 o Minor features (continuous integration):
5244 - When running coverage builds on Travis, we now set
5245 TOR_TEST_RNG_SEED, to avoid RNG-based coverage differences. Part
5248 o Minor features (maintenance):
5249 - Add a new "make autostyle" target that developers can use to apply
5250 all automatic Tor style and consistency conversions to the
5251 codebase. Closes ticket 30539.
5253 o Minor features (testing):
5254 - The circuitpadding tests now use a reproducible RNG implementation,
5255 so that if a test fails, we can learn why. Part of ticket 28878.
5256 - Tor's tests now support an environment variable, TOR_TEST_RNG_SEED,
5257 to set the RNG seed for tests that use a reproducible RNG. Part of
5259 - When running tests in coverage mode, take additional care to make
5260 our coverage deterministic, so that we can accurately track
5261 changes in code coverage. Closes ticket 30519.
5263 o Minor bugfixes (configuration, proxies):
5264 - Fix a bug that prevented us from supporting SOCKS5 proxies that
5265 want authentication along with configured (but unused!)
5266 ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.
5268 o Minor bugfixes (controller):
5269 - POSTDESCRIPTOR requests should work again. Previously, they were
5270 broken if a "purpose=" flag was specified. Fixes bug 30580; bugfix
5272 - Repair the HSFETCH command so that it works again. Previously, it
5273 expected a body when it shouldn't have. Fixes bug 30646; bugfix
5276 o Minor bugfixes (developer tooling):
5277 - Fix pre-push hook to allow fixup and squash commits when pushing
5278 to non-upstream git remote. Fixes bug 30286; bugfix
5281 o Minor bugfixes (directory authority):
5282 - Move the "bandwidth-file-headers" line in directory authority
5283 votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix
5286 o Minor bugfixes (NetBSD):
5287 - Fix usage of minherit() on NetBSD and other platforms that define
5288 MAP_INHERIT_{ZERO,NONE} instead of INHERIT_{ZERO,NONE}. Fixes bug
5289 30614; bugfix on 0.4.0.2-alpha. Patch from Taylor Campbell.
5291 o Minor bugfixes (out-of-memory handler):
5292 - When purging the DNS cache because of an out-of-memory condition,
5293 try purging just the older entries at first. Previously, we would
5294 always purge the whole thing. Fixes bug 29617; bugfix
5297 o Minor bugfixes (portability):
5298 - Avoid crashing in our tor_vasprintf() implementation on systems
5299 that define neither vasprintf() nor _vscprintf(). (This bug has
5300 been here long enough that we question whether people are running
5301 Tor on such systems, but we're applying the fix out of caution.)
5302 Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by
5305 o Minor bugfixes (shutdown, libevent, memory safety):
5306 - Avoid use-after-free bugs when shutting down, by making sure that
5307 we shut down libevent only after shutting down all of its users.
5308 We believe these are harmless in practice, since they only occur
5309 on the shutdown path, and do not involve any attacker-controlled
5310 data. Fixes bug 30629; bugfix on 0.4.1.1-alpha.
5312 o Minor bugfixes (static analysis):
5313 - Fix several spurious Coverity warnings about the unit tests, to
5314 lower our chances of missing real warnings in the future. Fixes
5315 bug 30150; bugfix on 0.3.5.1-alpha and various other Tor versions.
5318 - Specify torrc paths (with empty files) when launching tor in
5319 integration tests; refrain from reading user and system torrcs.
5320 Resolves issue 29702.
5323 Changes in version 0.4.1.1-alpha - 2019-05-22
5324 This is the first alpha in the 0.4.1.x series. It introduces
5325 lightweight circuit padding to make some onion-service circuits harder
5326 to distinguish, includes a new "authenticated SENDME" feature to make
5327 certain denial-of-service attacks more difficult, and improves
5328 performance in several areas.
5330 o Major features (circuit padding):
5331 - Onion service clients now add padding cells at the start of their
5332 INTRODUCE and RENDEZVOUS circuits, to make those circuits' traffic
5333 look more like general purpose Exit traffic. The overhead for this
5334 is 2 extra cells in each direction for RENDEZVOUS circuits, and 1
5335 extra upstream cell and 10 downstream cells for INTRODUCE
5336 circuits. This feature is only enabled when also supported by the
5337 circuit's middle node. (Clients may specify fixed middle nodes
5338 with the MiddleNodes option, and may force-disable this feature
5339 with the CircuitPadding option.) Closes ticket 28634.
5341 o Major features (code organization):
5342 - Tor now includes a generic publish-subscribe message-passing
5343 subsystem that we can use to organize intermodule dependencies. We
5344 hope to use this to reduce dependencies between modules that don't
5345 need to be related, and to generally simplify our codebase. Closes
5348 o Major features (controller protocol):
5349 - Controller commands are now parsed using a generalized parsing
5350 subsystem. Previously, each controller command was responsible for
5351 parsing its own input, which led to strange inconsistencies.
5352 Closes ticket 30091.
5354 o Major features (flow control):
5355 - Implement authenticated SENDMEs as detailed in proposal 289. A
5356 SENDME cell now includes the digest of the traffic that it
5357 acknowledges, so that once an end point receives the SENDME, it
5358 can confirm the other side's knowledge of the previous cells that
5359 were sent, and prevent certain types of denial-of-service attacks.
5360 This behavior is controlled by two new consensus parameters: see
5361 the proposal for more details. Fixes ticket 26288.
5363 o Major features (performance):
5364 - Our node selection algorithm now excludes nodes in linear time.
5365 Previously, the algorithm was quadratic, which could slow down
5366 heavily used onion services. Closes ticket 30307.
5368 o Major features (performance, RNG):
5369 - Tor now constructs a fast secure pseudorandom number generator for
5370 each thread, to use when performance is critical. This PRNG is
5371 based on AES-CTR, using a buffering construction similar to
5372 libottery and the (newer) OpenBSD arc4random() code. It
5373 outperforms OpenSSL 1.1.1a's CSPRNG by roughly a factor of 100 for
5374 small outputs. Although we believe it to be cryptographically
5375 strong, we are only using it when necessary for performance.
5376 Implements tickets 29023 and 29536.
5378 o Major bugfixes (onion service v3):
5379 - Fix an unreachable bug in which an introduction point could try to
5380 send an INTRODUCE_ACK with a status code that Trunnel would refuse
5381 to encode, leading the relay to assert(). We've consolidated the
5382 ABI values into Trunnel now. Fixes bug 30454; bugfix
5384 - Clients can now handle unknown status codes from INTRODUCE_ACK
5385 cells. (The NACK behavior will stay the same.) This will allow us
5386 to extend status codes in the future without breaking the normal
5387 client behavior. Fixes another part of bug 30454; bugfix
5390 o Minor features (circuit padding):
5391 - We now use a fast PRNG when scheduling circuit padding. Part of
5393 - Allow the padding machine designer to pick the edges of their
5394 histogram instead of trying to compute them automatically using an
5395 exponential formula. Resolves some undefined behavior in the case
5396 of small histograms and allows greater flexibility on machine
5397 design. Closes ticket 29298; bugfix on 0.4.0.1-alpha.
5398 - Allow circuit padding machines to hold a circuit open until they
5399 are done padding it. Closes ticket 28780.
5401 o Minor features (compile-time modules):
5402 - Add a "--list-modules" command to print a list of which compile-
5403 time modules are enabled. Closes ticket 30452.
5405 o Minor features (continuous integration):
5406 - Remove sudo configuration lines from .travis.yml as they are no
5407 longer needed with current Travis build environment. Resolves
5409 - In Travis, show stem's tor log after failure. Closes ticket 30234.
5411 o Minor features (controller):
5412 - Add onion service version 3 support to the HSFETCH command.
5413 Previously, only version 2 onion services were supported. Closes
5414 ticket 25417. Patch by Neel Chauhan.
5416 o Minor features (debugging):
5417 - Introduce tor_assertf() and tor_assertf_nonfatal() to enable
5418 logging of additional information during assert failure. Now we
5419 can use format strings to include information for trouble
5420 shooting. Resolves ticket 29662.
5422 o Minor features (defense in depth):
5423 - In smartlist_remove_keeporder(), set unused pointers to NULL, in
5424 case a bug causes them to be used later. Closes ticket 30176.
5425 Patch from Tobias Stoeckmann.
5426 - Tor now uses a cryptographically strong PRNG even for decisions
5427 that we do not believe are security-sensitive. Previously, for
5428 performance reasons, we had used a trivially predictable linear
5429 congruential generator algorithm for certain load-balancing and
5430 statistical sampling decisions. Now we use our fast RNG in those
5431 cases. Closes ticket 29542.
5433 o Minor features (developer tools):
5434 - Tor's "practracker" test script now checks for files and functions
5435 that seem too long and complicated. Existing overlong functions
5436 and files are accepted for now, but should eventually be
5437 refactored. Closes ticket 29221.
5438 - Add some scripts used for git maintenance to scripts/git. Closes
5440 - Call practracker from pre-push and pre-commit git hooks to let
5441 developers know if they made any code style violations. Closes
5443 - Add a script to check that each header has a well-formed and
5444 unique guard macro. Closes ticket 29756.
5446 o Minor features (geoip):
5447 - Update geoip and geoip6 to the May 13 2019 Maxmind GeoLite2
5448 Country database. Closes ticket 30522.
5450 o Minor features (HTTP tunnel):
5451 - Return an informative web page when the HTTPTunnelPort is used as
5452 an HTTP proxy. Closes ticket 27821, patch by "eighthave".
5454 o Minor features (IPv6, v3 onion services):
5455 - Make v3 onion services put IPv6 addresses in service descriptors.
5456 Before this change, service descriptors only contained IPv4
5457 addresses. Implements 26992.
5459 o Minor features (modularity):
5460 - The "--disable-module-dirauth" compile-time option now disables
5461 even more dirauth-only code. Closes ticket 30345.
5463 o Minor features (performance):
5464 - Use OpenSSL's implementations of SHA3 when available (in OpenSSL
5465 1.1.1 and later), since they tend to be faster than tiny-keccak.
5466 Closes ticket 28837.
5468 o Minor features (testing):
5469 - Tor's unit test code now contains helper functions to replace the
5470 PRNG with a deterministic or reproducible version for testing.
5471 Previously, various tests implemented this in various ways.
5472 Implements ticket 29732.
5473 - We now have a script, cov-test-determinism.sh, to identify places
5474 where our unit test coverage has become nondeterministic. Closes
5476 - Check that representative subsets of values of `int` and `unsigned
5477 int` can be represented by `void *`. Resolves issue 29537.
5479 o Minor bugfixes (bridge authority):
5480 - Bridge authorities now set bridges as running or non-running when
5481 about to dump their status to a file. Previously, they set bridges
5482 as running in response to a GETINFO command, but those shouldn't
5483 modify data structures. Fixes bug 24490; bugfix on 0.2.0.13-alpha.
5484 Patch by Neel Chauhan.
5486 o Minor bugfixes (channel padding statistics):
5487 - Channel padding write totals and padding-enabled totals are now
5488 counted properly in relay extrainfo descriptors. Fixes bug 29231;
5489 bugfix on 0.3.1.1-alpha.
5491 o Minor bugfixes (circuit padding):
5492 - Add a "CircuitPadding" torrc option to disable circuit padding.
5493 Fixes bug 28693; bugfix on 0.4.0.1-alpha.
5494 - Allow circuit padding machines to specify that they do not
5495 contribute much overhead, and provide consensus flags and torrc
5496 options to force clients to only use these low overhead machines.
5497 Fixes bug 29203; bugfix on 0.4.0.1-alpha.
5498 - Provide a consensus parameter to fully disable circuit padding, to
5499 be used in emergency network overload situations. Fixes bug 30173;
5500 bugfix on 0.4.0.1-alpha.
5501 - The circuit padding subsystem will no longer schedule padding if
5502 dormant mode is enabled. Fixes bug 28636; bugfix on 0.4.0.1-alpha.
5503 - Inspect a circuit-level cell queue before sending padding, to
5504 avoid sending padding while too much data is already queued. Fixes
5505 bug 29204; bugfix on 0.4.0.1-alpha.
5506 - Avoid calling monotime_absolute_usec() in circuit padding machines
5507 that do not use token removal or circuit RTT estimation. Fixes bug
5508 29085; bugfix on 0.4.0.1-alpha.
5510 o Minor bugfixes (compilation, unusual configurations):
5511 - Avoid failures when building with the ALL_BUGS_ARE_FATAL option
5512 due to missing declarations of abort(), and prevent other such
5513 failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.
5515 o Minor bugfixes (controller protocol):
5516 - Teach the controller parser to distinguish an object preceded by
5517 an argument list from one without. Previously, it couldn't
5518 distinguish an argument list from the first line of a multiline
5519 object. Fixes bug 29984; bugfix on 0.2.3.8-alpha.
5521 o Minor bugfixes (directory authority, ipv6):
5522 - Directory authorities with IPv6 support now always mark themselves
5523 as reachable via IPv6. Fixes bug 24338; bugfix on 0.2.4.1-alpha.
5524 Patch by Neel Chauhan.
5526 o Minor bugfixes (documentation):
5527 - Improve the documentation for using MapAddress with ".exit". Fixes
5528 bug 30109; bugfix on 0.1.0.1-rc.
5529 - Improve the monotonic time module and function documentation to
5530 explain what "monotonic" actually means, and document some results
5531 that have surprised people. Fixes bug 29640; bugfix
5533 - Use proper formatting when providing an example on quoting options
5534 that contain whitespace. Fixes bug 29635; bugfix on 0.2.3.18-rc.
5536 o Minor bugfixes (logging):
5537 - Do not log a warning when running with an OpenSSL version other
5538 than the one Tor was compiled with, if the two versions should be
5539 compatible. Previously, we would warn whenever the version was
5540 different. Fixes bug 30190; bugfix on 0.2.4.2-alpha.
5541 - Warn operators when the MyFamily option is set but ContactInfo is
5542 missing, as the latter should be set too. Fixes bug 25110; bugfix
5545 o Minor bugfixes (memory leak):
5546 - Avoid a minor memory leak that could occur on relays when failing
5547 to create a "keys" directory. Fixes bug 30148; bugfix
5550 o Minor bugfixes (onion services):
5551 - Avoid a GCC 9.1.1 warning (and possible crash depending on libc
5552 implemenation) when failing to load an onion service client
5553 authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha.
5554 - When refusing to launch a controller's HSFETCH request because of
5555 rate-limiting, respond to the controller with a new response,
5556 "QUERY_RATE_LIMITED". Previously, we would log QUERY_NO_HSDIR for
5557 this case. Fixes bug 28269; bugfix on 0.3.1.1-alpha. Patch by
5559 - When relaunching a circuit to a rendezvous service, mark the
5560 circuit as needing high-uptime routers as appropriate. Fixes bug
5561 17357; bugfix on 0.1.0.1-rc. Patch by Neel Chauhan.
5562 - Stop ignoring IPv6 link specifiers sent to v3 onion services.
5563 (IPv6 support for v3 onion services is still incomplete: see
5564 ticket 23493 for details.) Fixes bug 23588; bugfix on
5565 0.3.2.1-alpha. Patch by Neel Chauhan.
5567 o Minor bugfixes (onion services, performance):
5568 - When building circuits to onion services, call tor_addr_parse()
5569 less often. Previously, we called tor_addr_parse() in
5570 circuit_is_acceptable() even if its output wasn't used. This
5571 change should improve performance when building circuits. Fixes
5572 bug 22210; bugfix on 0.2.8.12. Patch by Neel Chauhan.
5574 o Minor bugfixes (performance):
5575 - When checking whether a node is a bridge, use a fast check to make
5576 sure that its identity is set. Previously, we used a constant-time
5577 check, which is not necessary in this case. Fixes bug 30308;
5578 bugfix on 0.3.5.1-alpha.
5580 o Minor bugfixes (pluggable transports):
5581 - Tor now sets TOR_PT_EXIT_ON_STDIN_CLOSE=1 for client transports as
5582 well as servers. Fixes bug 25614; bugfix on 0.2.7.1-alpha.
5584 o Minor bugfixes (probability distributions):
5585 - Refactor and improve parts of the probability distribution code
5586 that made Coverity complain. Fixes bug 29805; bugfix
5589 o Minor bugfixes (python):
5590 - Stop assuming that /usr/bin/python3 exists. For scripts that work
5591 with python2, use /usr/bin/python. Otherwise, use /usr/bin/env
5592 python3. Fixes bug 29913; bugfix on 0.2.5.3-alpha.
5594 o Minor bugfixes (relay):
5595 - When running as a relay, if IPv6Exit is set to 1 while ExitRelay
5596 is auto, act as if ExitRelay is 1. Previously, we would ignore
5597 IPv6Exit if ExitRelay was 0 or auto. Fixes bug 29613; bugfix on
5598 0.3.5.1-alpha. Patch by Neel Chauhan.
5600 o Minor bugfixes (stats):
5601 - When ExtraInfoStatistics is 0, stop including bandwidth usage
5602 statistics, GeoIPFile hashes, ServerTransportPlugin lines, and
5603 bridge statistics by country in extra-info documents. Fixes bug
5604 29018; bugfix on 0.2.4.1-alpha.
5606 o Minor bugfixes (testing):
5607 - Call setrlimit() to disable core dumps in test_bt_cl.c. Previously
5608 we used `ulimit -c` in test_bt.sh, which violates POSIX shell
5609 compatibility. Fixes bug 29061; bugfix on 0.3.5.1-alpha.
5610 - Fix some incorrect code in the v3 onion service unit tests. Fixes
5611 bug 29243; bugfix on 0.3.2.1-alpha.
5612 - In the "routerkeys/*" tests, check the return values of mkdir()
5613 for possible failures. Fixes bug 29939; bugfix on 0.2.7.2-alpha.
5614 Found by Coverity as CID 1444254.
5615 - Split test_utils_general() into several smaller test functions.
5616 This makes it easier to perform resource deallocation on assert
5617 failure, and fixes Coverity warnings CID 1444117 and CID 1444118.
5618 Fixes bug 29823; bugfix on 0.2.9.1-alpha.
5620 o Minor bugfixes (tor-resolve):
5621 - Fix a memory leak in tor-resolve that could happen if Tor gave it
5622 a malformed SOCKS response. (Memory leaks in tor-resolve don't
5623 actually matter, but it's good to fix them anyway.) Fixes bug
5624 30151; bugfix on 0.4.0.1-alpha.
5626 o Code simplification and refactoring:
5627 - Abstract out the low-level formatting of replies on the control
5628 port. Implements ticket 30007.
5629 - Add several assertions in an attempt to fix some Coverity
5630 warnings. Closes ticket 30149.
5631 - Introduce a connection_dir_buf_add() helper function that checks
5632 for compress_state of dir_connection_t and automatically writes a
5633 string to directory connection with or without compression.
5634 Resolves issue 28816.
5635 - Make the base32_decode() API return the number of bytes written,
5636 for consistency with base64_decode(). Closes ticket 28913.
5637 - Move most relay-only periodic events out of mainloop.c into the
5638 relay subsystem. Closes ticket 30414.
5639 - Refactor and encapsulate parts of the codebase that manipulate
5640 crypt_path_t objects. Resolves issue 30236.
5641 - Refactor several places in our code that Coverity incorrectly
5642 believed might have memory leaks. Closes ticket 30147.
5643 - Remove redundant return values in crypto_format, and the
5644 associated return value checks elsewhere in the code. Make the
5645 implementations in crypto_format consistent, and remove redundant
5646 code. Resolves ticket 29660.
5647 - Rename tor_mem_is_zero() to fast_mem_is_zero(), to emphasize that
5648 it is not a constant-time function. Closes ticket 30309.
5649 - Replace hs_desc_link_specifier_t with link_specifier_t, and remove
5650 all hs_desc_link_specifier_t-specific code. Fixes bug 22781;
5651 bugfix on 0.3.2.1-alpha.
5652 - Simplify v3 onion service link specifier handling code. Fixes bug
5653 23576; bugfix on 0.3.2.1-alpha.
5654 - Split crypto_digest.c into NSS code, OpenSSL code, and shared
5655 code. Resolves ticket 29108.
5656 - Split control.c into several submodules, in preparation for
5657 distributing its current responsibilities throughout the codebase.
5658 Closes ticket 29894.
5659 - Start to move responsibility for knowing about periodic events to
5660 the appropriate subsystems, so that the mainloop doesn't need to
5661 know all the periodic events in the rest of the codebase.
5662 Implements tickets 30293 and 30294.
5665 - Document how to find git commits and tags for bug fixes in
5666 CodingStandards.md. Update some file documentation. Closes
5670 - Remove the linux-tor-prio.sh script from contrib/operator-tools
5671 directory. Resolves issue 29434.
5672 - Remove the obsolete OpenSUSE initscript. Resolves issue 30076.
5673 - Remove the obsolete script at contrib/dist/tor.sh.in. Resolves
5676 o Code simplification and refactoring (shell scripts):
5677 - Clean up many of our shell scripts to fix shellcheck warnings.
5678 These include autogen.sh (ticket 26069), test_keygen.sh (ticket
5679 29062), test_switch_id.sh (ticket 29065), test_rebind.sh (ticket
5680 29063), src/test/fuzz/minimize.sh (ticket 30079), test_rust.sh
5681 (ticket 29064), torify (ticket 29070), asciidoc-helper.sh (29926),
5682 fuzz_multi.sh (30077), fuzz_static_testcases.sh (ticket 29059),
5683 nagios-check-tor-authority-cert (ticket 29071),
5684 src/test/fuzz/fixup_filenames.sh (ticket 30078), test-network.sh
5685 (ticket 29060), test_key_expiration.sh (ticket 30002),
5686 zero_length_keys.sh (ticket 29068), and test_workqueue_*.sh
5689 o Testing (chutney):
5690 - In "make test-network-all", test IPv6-only v3 single onion
5691 services, using the chutney network single-onion-v23-ipv6-md.
5692 Closes ticket 27251.
5695 Changes in version 0.4.0.5 - 2019-05-02
5696 This is the first stable release in the 0.4.0.x series. It contains
5697 improvements for power management and bootstrap reporting, as well as
5698 preliminary backend support for circuit padding to prevent some kinds
5699 of traffic analysis. It also continues our work in refactoring Tor for
5700 long-term maintainability.
5702 Per our support policy, we will support the 0.4.0.x series for nine
5703 months, or until three months after the release of a stable 0.4.1.x:
5704 whichever is longer. If you need longer-term support, please stick
5705 with 0.3.5.x, which will we plan to support until Feb 2022.
5707 Below are the changes since 0.4.0.4-rc. For a complete list of changes
5708 since 0.3.5.7, see the ReleaseNotes file.
5710 o Minor features (continuous integration):
5711 - In Travis, tell timelimit to use stem's backtrace signals, and
5712 launch python directly from timelimit, so python receives the
5713 signals from timelimit, rather than make. Closes ticket 30117.
5715 o Minor features (diagnostic):
5716 - Add more diagnostic log messages in an attempt to solve the issue
5717 of NUL bytes appearing in a microdescriptor cache. Related to
5720 o Minor features (testing):
5721 - Use the approx_time() function when setting the "Expires" header
5722 in directory replies, to make them more testable. Needed for
5725 o Minor bugfixes (rust):
5726 - Abort on panic in all build profiles, instead of potentially
5727 unwinding into C code. Fixes bug 27199; bugfix on 0.3.3.1-alpha.
5729 o Minor bugfixes (shellcheck):
5730 - Look for scripts in their correct locations during "make
5731 shellcheck". Previously we had looked in the wrong place during
5732 out-of-tree builds. Fixes bug 30263; bugfix on 0.4.0.1-alpha.
5734 o Minor bugfixes (testing):
5735 - Check the time in the "Expires" header using approx_time(). Fixes
5736 bug 30001; bugfix on 0.4.0.4-rc.
5738 o Minor bugfixes (UI):
5739 - Lower log level of unlink() errors during bootstrap. Fixes bug
5740 29930; bugfix on 0.4.0.1-alpha.
5743 Changes in version 0.4.0.4-rc - 2019-04-11
5744 Tor 0.4.0.4-rc is the first release candidate in its series; it fixes
5745 several bugs from earlier versions, including some that had affected
5746 stability, and one that prevented relays from working with NSS.
5748 o Major bugfixes (NSS, relay):
5749 - When running with NSS, disable TLS 1.2 ciphersuites that use
5750 SHA384 for their PRF. Due to an NSS bug, the TLS key exporters for
5751 these ciphersuites don't work -- which caused relays to fail to
5752 handshake with one another when these ciphersuites were enabled.
5753 Fixes bug 29241; bugfix on 0.3.5.1-alpha.
5755 o Minor features (bandwidth authority):
5756 - Make bandwidth authorities ignore relays that are reported in the
5757 bandwidth file with the flag "vote=0". This change allows us to
5758 report unmeasured relays for diagnostic reasons without including
5759 their bandwidth in the bandwidth authorities' vote. Closes
5761 - When a directory authority is using a bandwidth file to obtain the
5762 bandwidth values that will be included in the next vote, serve
5763 this bandwidth file at /tor/status-vote/next/bandwidth. Closes
5766 o Minor features (circuit padding):
5767 - Stop warning about undefined behavior in the probability
5768 distribution tests. Float division by zero may technically be
5769 undefined behavior in C, but it's well defined in IEEE 754.
5770 Partial backport of 29298. Closes ticket 29527; bugfix
5773 o Minor features (continuous integration):
5774 - On Travis Rust builds, cleanup Rust registry and refrain from
5775 caching the "target/" directory to speed up builds. Resolves
5778 o Minor features (dormant mode):
5779 - Add a DormantCanceledByStartup option to tell Tor that it should
5780 treat a startup event as cancelling any previous dormant state.
5781 Integrators should use this option with caution: it should only be
5782 used if Tor is being started because of something that the user
5783 did, and not if Tor is being automatically started in the
5784 background. Closes ticket 29357.
5786 o Minor features (geoip):
5787 - Update geoip and geoip6 to the April 2 2019 Maxmind GeoLite2
5788 Country database. Closes ticket 29992.
5790 o Minor features (NSS, diagnostic):
5791 - Try to log an error from NSS (if there is any) and a more useful
5792 description of our situation if we are using NSS and a call to
5793 SSL_ExportKeyingMaterial() fails. Diagnostic for ticket 29241.
5795 o Minor bugfixes (security):
5796 - Fix a potential double free bug when reading huge bandwidth files.
5797 The issue is not exploitable in the current Tor network because
5798 the vulnerable code is only reached when directory authorities
5799 read bandwidth files, but bandwidth files come from a trusted
5800 source (usually the authorities themselves). Furthermore, the
5801 issue is only exploitable in rare (non-POSIX) 32-bit architectures,
5802 which are not used by any of the current authorities. Fixes bug
5803 30040; bugfix on 0.3.5.1-alpha. Bug found and fixed by
5805 - Verify in more places that we are not about to create a buffer
5806 with more than INT_MAX bytes, to avoid possible OOB access in the
5807 event of bugs. Fixes bug 30041; bugfix on 0.2.0.16. Found and
5808 fixed by Tobias Stoeckmann.
5810 o Minor bugfix (continuous integration):
5811 - Reset coverage state on disk after Travis CI has finished. This
5812 should prevent future coverage merge errors from causing the test
5813 suite for the "process" subsystem to fail. The process subsystem
5814 was introduced in 0.4.0.1-alpha. Fixes bug 29036; bugfix
5816 - Terminate test-stem if it takes more than 9.5 minutes to run.
5817 (Travis terminates the job after 10 minutes of no output.)
5818 Diagnostic for 29437. Fixes bug 30011; bugfix on 0.3.5.4-alpha.
5820 o Minor bugfixes (bootstrap reporting):
5821 - During bootstrap reporting, correctly distinguish pluggable
5822 transports from plain proxies. Fixes bug 28925; bugfix
5825 o Minor bugfixes (C correctness):
5826 - Fix an unlikely memory leak in consensus_diff_apply(). Fixes bug
5827 29824; bugfix on 0.3.1.1-alpha. This is Coverity warning
5830 o Minor bugfixes (circuitpadding testing):
5831 - Minor tweaks to avoid rare test failures related to timers and
5832 monotonic time. Fixes bug 29500; bugfix on 0.4.0.1-alpha.
5834 o Minor bugfixes (directory authorities):
5835 - Actually include the bandwidth-file-digest line in directory
5836 authority votes. Fixes bug 29959; bugfix on 0.4.0.2-alpha.
5838 o Minor bugfixes (logging):
5839 - On Windows, when errors cause us to reload a consensus from disk,
5840 tell the user that we are retrying at log level "notice".
5841 Previously we only logged this information at "info", which was
5842 confusing because the errors themselves were logged at "warning".
5843 Improves previous fix for 28614. Fixes bug 30004; bugfix
5846 o Minor bugfixes (pluggable transports):
5847 - Restore old behavior when it comes to discovering the path of a
5848 given Pluggable Transport executable file. A change in
5849 0.4.0.1-alpha had broken this behavior on paths containing a
5850 space. Fixes bug 29874; bugfix on 0.4.0.1-alpha.
5852 o Minor bugfixes (testing):
5853 - Backport the 0.3.4 src/test/test-network.sh to 0.2.9. We need a
5854 recent test-network.sh to use new chutney features in CI. Fixes
5855 bug 29703; bugfix on 0.2.9.1-alpha.
5856 - Fix a test failure on Windows caused by an unexpected "BUG"
5857 warning in our tests for tor_gmtime_r(-1). Fixes bug 29922; bugfix
5860 o Minor bugfixes (TLS protocol):
5861 - When classifying a client's selection of TLS ciphers, if the
5862 client ciphers are not yet available, do not cache the result.
5863 Previously, we had cached the unavailability of the cipher list
5864 and never looked again, which in turn led us to assume that the
5865 client only supported the ancient V1 link protocol. This, in turn,
5866 was causing Stem integration tests to stall in some cases. Fixes
5867 bug 30021; bugfix on 0.2.4.8-alpha.
5869 o Code simplification and refactoring:
5870 - Introduce a connection_dir_buf_add() helper function that detects
5871 whether compression is in use, and adds a string accordingly.
5872 Resolves issue 28816.
5873 - Refactor handle_get_next_bandwidth() to use
5874 connection_dir_buf_add(). Implements ticket 29897.
5877 - Clarify that Tor performs stream isolation among *Port listeners
5878 by default. Resolves issue 29121.
5881 Changes in version 0.4.0.3-alpha - 2019-03-22
5882 Tor 0.4.0.3-alpha is the third in its series; it fixes several small
5883 bugs from earlier versions.
5885 o Minor features (address selection):
5886 - Treat the subnet 100.64.0.0/10 as public for some purposes;
5887 private for others. This subnet is the RFC 6598 (Carrier Grade
5888 NAT) IP range, and is deployed by many ISPs as an alternative to
5889 RFC 1918 that does not break existing internal networks. Tor now
5890 blocks SOCKS and control ports on these addresses and warns users
5891 if client ports or ExtORPorts are listening on a RFC 6598 address.
5892 Closes ticket 28525. Patch by Neel Chauhan.
5894 o Minor features (geoip):
5895 - Update geoip and geoip6 to the March 4 2019 Maxmind GeoLite2
5896 Country database. Closes ticket 29666.
5898 o Minor bugfixes (circuitpadding):
5899 - Inspect the circuit-level cell queue before sending padding, to
5900 avoid sending padding when too much data is queued. Fixes bug
5901 29204; bugfix on 0.4.0.1-alpha.
5903 o Minor bugfixes (logging):
5904 - Correct a misleading error message when IPv4Only or IPv6Only is
5905 used but the resolved address can not be interpreted as an address
5906 of the specified IP version. Fixes bug 13221; bugfix on
5907 0.2.3.9-alpha. Patch from Kris Katterjohn.
5908 - Log the correct port number for listening sockets when "auto" is
5909 used to let Tor pick the port number. Previously, port 0 was
5910 logged instead of the actual port number. Fixes bug 29144; bugfix
5911 on 0.3.5.1-alpha. Patch from Kris Katterjohn.
5912 - Stop logging a BUG() warning when Tor is waiting for exit
5913 descriptors. Fixes bug 28656; bugfix on 0.3.5.1-alpha.
5915 o Minor bugfixes (memory management):
5916 - Refactor the shared random state's memory management so that it
5917 actually takes ownership of the shared random value pointers.
5918 Fixes bug 29706; bugfix on 0.2.9.1-alpha.
5920 o Minor bugfixes (memory management, testing):
5921 - Stop leaking parts of the shared random state in the shared-random
5922 unit tests. Fixes bug 29599; bugfix on 0.2.9.1-alpha.
5924 o Minor bugfixes (pluggable transports):
5925 - Fix an assertion failure crash bug when a pluggable transport is
5926 terminated during the bootstrap phase. Fixes bug 29562; bugfix
5929 o Minor bugfixes (Rust, protover):
5930 - Add a missing "Padding" value to the Rust implementation of
5931 protover. Fixes bug 29631; bugfix on 0.4.0.1-alpha.
5933 o Minor bugfixes (single onion services):
5934 - Allow connections to single onion services to remain idle without
5935 being disconnected. Previously, relays acting as rendezvous points
5936 for single onion services were mistakenly closing idle rendezvous
5937 circuits after 60 seconds, thinking that they were unused
5938 directory-fetching circuits that had served their purpose. Fixes
5939 bug 29665; bugfix on 0.2.1.26.
5941 o Minor bugfixes (stats):
5942 - When ExtraInfoStatistics is 0, stop including PaddingStatistics in
5943 relay and bridge extra-info documents. Fixes bug 29017; bugfix
5946 o Minor bugfixes (testing):
5947 - Downgrade some LOG_ERR messages in the address/* tests to
5948 warnings. The LOG_ERR messages were occurring when we had no
5949 configured network. We were failing the unit tests, because we
5950 backported 28668 to 0.3.5.8, but did not backport 29530. Fixes bug
5951 29530; bugfix on 0.3.5.8.
5952 - Fix our gcov wrapper script to look for object files at the
5953 correct locations. Fixes bug 29435; bugfix on 0.3.5.1-alpha.
5954 - Decrease the false positive rate of stochastic probability
5955 distribution tests. Fixes bug 29693; bugfix on 0.4.0.1-alpha.
5957 o Minor bugfixes (Windows, CI):
5958 - Skip the Appveyor 32-bit Windows Server 2016 job, and 64-bit
5959 Windows Server 2012 R2 job. The remaining 2 jobs still provide
5960 coverage of 64/32-bit, and Windows Server 2016/2012 R2. Also set
5961 fast_finish, so failed jobs terminate the build immediately. Fixes
5962 bug 29601; bugfix on 0.3.5.4-alpha.
5965 Changes in version 0.3.5.8 - 2019-02-21
5966 Tor 0.3.5.8 backports several fixes from later releases, including fixes
5967 for an annoying SOCKS-parsing bug that affected users in earlier 0.3.5.x
5970 It also includes a fix for a medium-severity security bug affecting Tor
5971 0.3.2.1-alpha and later. All Tor instances running an affected release
5972 should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
5974 o Major bugfixes (cell scheduler, KIST, security):
5975 - Make KIST consider the outbuf length when computing what it can
5976 put in the outbuf. Previously, KIST acted as though the outbuf
5977 were empty, which could lead to the outbuf becoming too full. It
5978 is possible that an attacker could exploit this bug to cause a Tor
5979 client or relay to run out of memory and crash. Fixes bug 29168;
5980 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
5981 TROVE-2019-001 and CVE-2019-8955.
5983 o Major bugfixes (networking, backport from 0.4.0.2-alpha):
5984 - Gracefully handle empty username/password fields in SOCKS5
5985 username/password auth message and allow SOCKS5 handshake to
5986 continue. Previously, we had rejected these handshakes, breaking
5987 certain applications. Fixes bug 29175; bugfix on 0.3.5.1-alpha.
5989 o Minor features (compilation, backport from 0.4.0.2-alpha):
5990 - Compile correctly when OpenSSL is built with engine support
5991 disabled, or with deprecated APIs disabled. Closes ticket 29026.
5992 Patches from "Mangix".
5994 o Minor features (geoip):
5995 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
5996 Country database. Closes ticket 29478.
5998 o Minor features (testing, backport from 0.4.0.2-alpha):
5999 - Treat all unexpected ERR and BUG messages as test failures. Closes
6002 o Minor bugfixes (onion service v3, client, backport from 0.4.0.1-alpha):
6003 - Stop logging a "BUG()" warning and stacktrace when we find a SOCKS
6004 connection waiting for a descriptor that we actually have in the
6005 cache. It turns out that this can actually happen, though it is
6006 rare. Now, tor will recover and retry the descriptor. Fixes bug
6007 28669; bugfix on 0.3.2.4-alpha.
6009 o Minor bugfixes (IPv6, backport from 0.4.0.1-alpha):
6010 - Fix tor_ersatz_socketpair on IPv6-only systems. Previously, the
6011 IPv6 socket was bound using an address family of AF_INET instead
6012 of AF_INET6. Fixes bug 28995; bugfix on 0.3.5.1-alpha. Patch from
6015 o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
6016 - Update Cargo.lock file to match the version made by the latest
6017 version of Rust, so that "make distcheck" will pass again. Fixes
6018 bug 29244; bugfix on 0.3.3.4-alpha.
6020 o Minor bugfixes (client, clock skew, backport from 0.4.0.1-alpha):
6021 - Select guards even if the consensus has expired, as long as the
6022 consensus is still reasonably live. Fixes bug 24661; bugfix
6025 o Minor bugfixes (compilation, backport from 0.4.0.1-alpha):
6026 - Compile correctly on OpenBSD; previously, we were missing some
6027 headers required in order to detect it properly. Fixes bug 28938;
6028 bugfix on 0.3.5.1-alpha. Patch from Kris Katterjohn.
6030 o Minor bugfixes (documentation, backport from 0.4.0.2-alpha):
6031 - Describe the contents of the v3 onion service client authorization
6032 files correctly: They hold public keys, not private keys. Fixes
6033 bug 28979; bugfix on 0.3.5.1-alpha. Spotted by "Felixix".
6035 o Minor bugfixes (logging, backport from 0.4.0.1-alpha):
6036 - Rework rep_hist_log_link_protocol_counts() to iterate through all
6037 link protocol versions when logging incoming/outgoing connection
6038 counts. Tor no longer skips version 5, and we won't have to
6039 remember to update this function when new link protocol version is
6040 developed. Fixes bug 28920; bugfix on 0.2.6.10.
6042 o Minor bugfixes (logging, backport from 0.4.0.2-alpha):
6043 - Log more information at "warning" level when unable to read a
6044 private key; log more information at "info" level when unable to
6045 read a public key. We had warnings here before, but they were lost
6046 during our NSS work. Fixes bug 29042; bugfix on 0.3.5.1-alpha.
6048 o Minor bugfixes (misc, backport from 0.4.0.2-alpha):
6049 - The amount of total available physical memory is now determined
6050 using the sysctl identifier HW_PHYSMEM (rather than HW_USERMEM)
6051 when it is defined and a 64-bit variant is not available. Fixes
6052 bug 28981; bugfix on 0.2.5.4-alpha. Patch from Kris Katterjohn.
6054 o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
6055 - Avoid crashing if ClientOnionAuthDir (incorrectly) contains more
6056 than one private key for a hidden service. Fixes bug 29040; bugfix
6058 - In hs_cache_store_as_client() log an HSDesc we failed to parse at
6059 "debug" level. Tor used to log it as a warning, which caused very
6060 long log lines to appear for some users. Fixes bug 29135; bugfix
6062 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
6063 as a warning. Instead, log it as a protocol warning, because there
6064 is nothing that relay operators can do to fix it. Fixes bug 29029;
6065 bugfix on 0.2.5.7-rc.
6067 o Minor bugfixes (tests, directory clients, backport from 0.4.0.1-alpha):
6068 - Mark outdated dirservers when Tor only has a reasonably live
6069 consensus. Fixes bug 28569; bugfix on 0.3.2.5-alpha.
6071 o Minor bugfixes (tests, backport from 0.4.0.2-alpha):
6072 - Detect and suppress "bug" warnings from the util/time test on
6073 Windows. Fixes bug 29161; bugfix on 0.2.9.3-alpha.
6074 - Do not log an error-level message if we fail to find an IPv6
6075 network interface from the unit tests. Fixes bug 29160; bugfix
6078 o Minor bugfixes (usability, backport from 0.4.0.1-alpha):
6079 - Stop saying "Your Guard ..." in pathbias_measure_{use,close}_rate().
6080 Some users took this phrasing to mean that the mentioned guard was
6081 under their control or responsibility, which it is not. Fixes bug
6082 28895; bugfix on Tor 0.3.0.1-alpha.
6085 Changes in version 0.3.4.11 - 2019-02-21
6086 Tor 0.3.4.11 is the third stable release in its series. It includes
6087 a fix for a medium-severity security bug affecting Tor 0.3.2.1-alpha and
6088 later. All Tor instances running an affected release should upgrade to
6089 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
6091 o Major bugfixes (cell scheduler, KIST, security):
6092 - Make KIST consider the outbuf length when computing what it can
6093 put in the outbuf. Previously, KIST acted as though the outbuf
6094 were empty, which could lead to the outbuf becoming too full. It
6095 is possible that an attacker could exploit this bug to cause a Tor
6096 client or relay to run out of memory and crash. Fixes bug 29168;
6097 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
6098 TROVE-2019-001 and CVE-2019-8955.
6100 o Minor features (geoip):
6101 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
6102 Country database. Closes ticket 29478.
6104 o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
6105 - Update Cargo.lock file to match the version made by the latest
6106 version of Rust, so that "make distcheck" will pass again. Fixes
6107 bug 29244; bugfix on 0.3.3.4-alpha.
6109 o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
6110 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
6111 as a warning. Instead, log it as a protocol warning, because there
6112 is nothing that relay operators can do to fix it. Fixes bug 29029;
6113 bugfix on 0.2.5.7-rc.
6116 Changes in version 0.3.3.12 - 2019-02-21
6117 Tor 0.3.3.12 fixes a medium-severity security bug affecting Tor
6118 0.3.2.1-alpha and later. All Tor instances running an affected release
6119 should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
6121 This release marks the end of support for the Tor 0.3.3.x series. We
6122 recommend that users switch to either the Tor 0.3.4 series (supported
6123 until at least 10 June 2019), or the Tor 0.3.5 series, which will
6124 receive long-term support until at least 1 Feb 2022.
6126 o Major bugfixes (cell scheduler, KIST, security):
6127 - Make KIST consider the outbuf length when computing what it can
6128 put in the outbuf. Previously, KIST acted as though the outbuf
6129 were empty, which could lead to the outbuf becoming too full. It
6130 is possible that an attacker could exploit this bug to cause a Tor
6131 client or relay to run out of memory and crash. Fixes bug 29168;
6132 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
6133 TROVE-2019-001 and CVE-2019-8955.
6135 o Minor features (geoip):
6136 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
6137 Country database. Closes ticket 29478.
6139 o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
6140 - Update Cargo.lock file to match the version made by the latest
6141 version of Rust, so that "make distcheck" will pass again. Fixes
6142 bug 29244; bugfix on 0.3.3.4-alpha.
6144 o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
6145 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
6146 as a warning. Instead, log it as a protocol warning, because there
6147 is nothing that relay operators can do to fix it. Fixes bug 29029;
6148 bugfix on 0.2.5.7-rc.
6151 Changes in version 0.4.0.2-alpha - 2019-02-21
6152 Tor 0.4.0.2-alpha is the second alpha in its series; it fixes several
6153 bugs from earlier versions, including several that had broken
6154 backward compatibility.
6156 It also includes a fix for a medium-severity security bug affecting Tor
6157 0.3.2.1-alpha and later. All Tor instances running an affected release
6158 should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
6160 o Major bugfixes (cell scheduler, KIST, security):
6161 - Make KIST consider the outbuf length when computing what it can
6162 put in the outbuf. Previously, KIST acted as though the outbuf
6163 were empty, which could lead to the outbuf becoming too full. It
6164 is possible that an attacker could exploit this bug to cause a Tor
6165 client or relay to run out of memory and crash. Fixes bug 29168;
6166 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
6167 TROVE-2019-001 and CVE-2019-8955.
6169 o Major bugfixes (networking):
6170 - Gracefully handle empty username/password fields in SOCKS5
6171 username/password auth messsage and allow SOCKS5 handshake to
6172 continue. Previously, we had rejected these handshakes, breaking
6173 certain applications. Fixes bug 29175; bugfix on 0.3.5.1-alpha.
6175 o Major bugfixes (windows, startup):
6176 - When reading a consensus file from disk, detect whether it was
6177 written in text mode, and re-read it in text mode if so. Always
6178 write consensus files in binary mode so that we can map them into
6179 memory later. Previously, we had written in text mode, which
6180 confused us when we tried to map the file on windows. Fixes bug
6181 28614; bugfix on 0.4.0.1-alpha.
6183 o Minor features (compilation):
6184 - Compile correctly when OpenSSL is built with engine support
6185 disabled, or with deprecated APIs disabled. Closes ticket 29026.
6186 Patches from "Mangix".
6188 o Minor features (developer tooling):
6189 - Check that bugfix versions in changes files look like Tor versions
6190 from the versions spec. Warn when bugfixes claim to be on a future
6191 release. Closes ticket 27761.
6192 - Provide a git pre-commit hook that disallows committing if we have
6193 any failures in our code and changelog formatting checks. It is
6194 now available in scripts/maint/pre-commit.git-hook. Implements
6197 o Minor features (directory authority):
6198 - When a directory authority is using a bandwidth file to obtain
6199 bandwidth values, include the digest of that file in the vote.
6200 Closes ticket 26698.
6202 o Minor features (geoip):
6203 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
6204 Country database. Closes ticket 29478.
6206 o Minor features (testing):
6207 - Treat all unexpected ERR and BUG messages as test failures. Closes
6210 o Minor bugfixes (build, compatibility, rust):
6211 - Update Cargo.lock file to match the version made by the latest
6212 version of Rust, so that "make distcheck" will pass again. Fixes
6213 bug 29244; bugfix on 0.3.3.4-alpha.
6215 o Minor bugfixes (compilation):
6216 - Fix compilation warnings in test_circuitpadding.c. Fixes bug
6217 29169; bugfix on 0.4.0.1-alpha.
6218 - Silence a compiler warning in test-memwipe.c on OpenBSD. Fixes bug
6219 29145; bugfix on 0.2.9.3-alpha. Patch from Kris Katterjohn.
6221 o Minor bugfixes (documentation):
6222 - Describe the contents of the v3 onion service client authorization
6223 files correctly: They hold public keys, not private keys. Fixes
6224 bug 28979; bugfix on 0.3.5.1-alpha. Spotted by "Felixix".
6226 o Minor bugfixes (linux seccomp sandbox):
6227 - Fix startup crash when experimental sandbox support is enabled.
6228 Fixes bug 29150; bugfix on 0.4.0.1-alpha. Patch by Peter Gerber.
6230 o Minor bugfixes (logging):
6231 - Avoid logging that we are relaxing a circuit timeout when that
6232 timeout is fixed. Fixes bug 28698; bugfix on 0.2.4.7-alpha.
6233 - Log more information at "warning" level when unable to read a
6234 private key; log more information at "info" level when unable to
6235 read a public key. We had warnings here before, but they were lost
6236 during our NSS work. Fixes bug 29042; bugfix on 0.3.5.1-alpha.
6238 o Minor bugfixes (misc):
6239 - The amount of total available physical memory is now determined
6240 using the sysctl identifier HW_PHYSMEM (rather than HW_USERMEM)
6241 when it is defined and a 64-bit variant is not available. Fixes
6242 bug 28981; bugfix on 0.2.5.4-alpha. Patch from Kris Katterjohn.
6244 o Minor bugfixes (onion services):
6245 - Avoid crashing if ClientOnionAuthDir (incorrectly) contains more
6246 than one private key for a hidden service. Fixes bug 29040; bugfix
6248 - In hs_cache_store_as_client() log an HSDesc we failed to parse at
6249 "debug" level. Tor used to log it as a warning, which caused very
6250 long log lines to appear for some users. Fixes bug 29135; bugfix
6252 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
6253 as a warning. Instead, log it as a protocol warning, because there
6254 is nothing that relay operators can do to fix it. Fixes bug 29029;
6255 bugfix on 0.2.5.7-rc.
6257 o Minor bugfixes (scheduler):
6258 - When re-adding channels to the pending list, check the correct
6259 channel's sched_heap_idx. This issue has had no effect in mainline
6260 Tor, but could have led to bugs down the road in improved versions
6261 of our circuit scheduling code. Fixes bug 29508; bugfix
6264 o Minor bugfixes (tests):
6265 - Fix intermittent failures on an adaptive padding test. Fixes one
6266 case of bug 29122; bugfix on 0.4.0.1-alpha.
6267 - Disable an unstable circuit-padding test that was failing
6268 intermittently because of an ill-defined small histogram. Such
6269 histograms will be allowed again after 29298 is implemented. Fixes
6270 a second case of bug 29122; bugfix on 0.4.0.1-alpha.
6271 - Detect and suppress "bug" warnings from the util/time test on
6272 Windows. Fixes bug 29161; bugfix on 0.2.9.3-alpha.
6273 - Do not log an error-level message if we fail to find an IPv6
6274 network interface from the unit tests. Fixes bug 29160; bugfix
6278 - In the manpage entry describing MapAddress torrc setting, use
6279 example IP addresses from ranges specified for use in documentation
6280 by RFC 5737. Resolves issue 28623.
6283 - Remove the old check-tor script. Resolves issue 29072.
6286 Changes in version 0.4.0.1-alpha - 2019-01-18
6287 Tor 0.4.0.1-alpha is the first release in the new 0.4.0.x series. It
6288 introduces improved features for power and bandwidth conservation,
6289 more accurate reporting of bootstrap progress for user interfaces, and
6290 an experimental backend for an exciting new adaptive padding feature.
6291 There is also the usual assortment of bugfixes and minor features, all
6294 o Major features (battery management, client, dormant mode):
6295 - When Tor is running as a client, and it is unused for a long time,
6296 it can now enter a "dormant" state. When Tor is dormant, it avoids
6297 network and CPU activity until it is reawoken either by a user
6298 request or by a controller command. For more information, see the
6299 configuration options starting with "Dormant". Implements tickets
6301 - The client's memory of whether it is "dormant", and how long it
6302 has spent idle, persists across invocations. Implements
6304 - There is a DormantOnFirstStartup option that integrators can use
6305 if they expect that in many cases, Tor will be installed but
6308 o Major features (bootstrap reporting):
6309 - When reporting bootstrap progress, report the first connection
6310 uniformly, regardless of whether it's a connection for building
6311 application circuits. This allows finer-grained reporting of early
6312 progress than previously possible, with the improvements of ticket
6313 27169. Closes tickets 27167 and 27103. Addresses ticket 27308.
6314 - When reporting bootstrap progress, treat connecting to a proxy or
6315 pluggable transport as separate from having successfully used that
6316 proxy or pluggable transport to connect to a relay. Closes tickets
6319 o Major features (circuit padding):
6320 - Implement preliminary support for the circuit padding portion of
6321 Proposal 254. The implementation supports Adaptive Padding (aka
6322 WTF-PAD) state machines for use between experimental clients and
6323 relays. Support is also provided for APE-style state machines that
6324 use probability distributions instead of histograms to specify
6325 inter-packet delay. At the moment, Tor does not provide any
6326 padding state machines that are used in normal operation: for now,
6327 this feature exists solely for experimentation. Closes
6330 o Major features (refactoring):
6331 - Tor now uses an explicit list of its own subsystems when
6332 initializing and shutting down. Previously, these systems were
6333 managed implicitly in various places throughout the codebase.
6334 (There may still be some subsystems using the old system.) Closes
6337 o Minor features (bootstrap reporting):
6338 - When reporting bootstrap progress, stop distinguishing between
6339 situations where only internal paths are available and situations
6340 where external paths are available. Previously, Tor would often
6341 erroneously report that it had only internal paths. Closes
6344 o Minor features (continuous integration):
6345 - Log Python version during each Travis CI job. Resolves
6348 o Minor features (controller):
6349 - Add a DROPOWNERSHIP command to undo the effects of TAKEOWNERSHIP.
6350 Implements ticket 28843.
6352 o Minor features (developer tooling):
6353 - Provide a git hook script to prevent "fixup!" and "squash!"
6354 commits from ending up in the master branch, as scripts/main/pre-
6355 push.git-hook. Closes ticket 27993.
6357 o Minor features (directory authority):
6358 - Directory authorities support a new consensus algorithm, under
6359 which the family lines in microdescriptors are encoded in a
6360 canonical form. This change makes family lines more compressible
6361 in transit, and on the client. Closes ticket 28266; implements
6364 o Minor features (directory authority, relay):
6365 - Authorities now vote on a "StaleDesc" flag to indicate that a
6366 relay's descriptor is so old that the relay should upload again
6367 soon. Relays treat this flag as a signal to upload a new
6368 descriptor. This flag will eventually let us remove the
6369 'published' date from routerstatus entries, and make our consensus
6370 diffs much smaller. Closes ticket 26770; implements proposal 293.
6372 o Minor features (fallback directory mirrors):
6373 - Update the fallback whitelist based on operator opt-ins and opt-
6374 outs. Closes ticket 24805, patch by Phoul.
6376 o Minor features (FreeBSD):
6377 - On FreeBSD-based systems, warn relay operators if the
6378 "net.inet.ip.random_id" sysctl (IP ID randomization) is disabled.
6379 Closes ticket 28518.
6381 o Minor features (HTTP standards compliance):
6382 - Stop sending the header "Content-type: application/octet-stream"
6383 along with transparently compressed documents: this confused
6384 browsers. Closes ticket 28100.
6386 o Minor features (IPv6):
6387 - We add an option ClientAutoIPv6ORPort, to make clients randomly
6388 prefer a node's IPv4 or IPv6 ORPort. The random preference is set
6389 every time a node is loaded from a new consensus or bridge config.
6390 We expect that this option will enable clients to bootstrap more
6391 quickly without having to determine whether they support IPv4,
6392 IPv6, or both. Closes ticket 27490. Patch by Neel Chauhan.
6393 - When using addrs_in_same_network_family(), avoid choosing circuit
6394 paths that pass through the same IPv6 subnet more than once.
6395 Previously, we only checked IPv4 subnets. Closes ticket 24393.
6396 Patch by Neel Chauhan.
6398 o Minor features (log messages):
6399 - Improve log message in v3 onion services that could print out
6400 negative revision counters. Closes ticket 27707. Patch
6403 o Minor features (memory usage):
6404 - Save memory by storing microdescriptor family lists with a more
6405 compact representation. Closes ticket 27359.
6406 - Tor clients now use mmap() to read consensus files from disk, so
6407 that they no longer need keep the full text of a consensus in
6408 memory when parsing it or applying a diff. Closes ticket 27244.
6410 o Minor features (parsing):
6411 - Directory authorities now validate that router descriptors and
6412 ExtraInfo documents are in a valid subset of UTF-8, and reject
6413 them if they are not. Closes ticket 27367.
6415 o Minor features (performance):
6416 - Cache the results of summarize_protocol_flags(), so that we don't
6417 have to parse the same protocol-versions string over and over.
6418 This should save us a huge number of malloc calls on startup, and
6419 may reduce memory fragmentation with some allocators. Closes
6421 - Remove a needless memset() call from get_token_arguments, thereby
6422 speeding up the tokenization of directory objects by about 20%.
6423 Closes ticket 28852.
6424 - Replace parse_short_policy() with a faster implementation, to
6425 improve microdescriptor parsing time. Closes ticket 28853.
6426 - Speed up directory parsing a little by avoiding use of the non-
6427 inlined strcmp_len() function. Closes ticket 28856.
6428 - Speed up microdescriptor parsing by about 30%, to help improve
6429 startup time. Closes ticket 28839.
6431 o Minor features (pluggable transports):
6432 - Add support for emitting STATUS updates to Tor's control port from
6433 a pluggable transport process. Closes ticket 28846.
6434 - Add support for logging to Tor's logging subsystem from a
6435 pluggable transport process. Closes ticket 28180.
6437 o Minor features (process management):
6438 - Add a new process API for handling child processes. This new API
6439 allows Tor to have bi-directional communication with child
6440 processes on both Unix and Windows. Closes ticket 28179.
6441 - Use the subsystem manager to initialize and shut down the process
6442 module. Closes ticket 28847.
6444 o Minor features (relay):
6445 - When listing relay families, list them in canonical form including
6446 the relay's own identity, and try to give a more useful set of
6447 warnings. Part of ticket 28266 and proposal 298.
6449 o Minor features (required protocols):
6450 - Before exiting because of a missing required protocol, Tor will
6451 now check the publication time of the consensus, and not exit
6452 unless the consensus is newer than the Tor program's own release
6453 date. Previously, Tor would not check the consensus publication
6454 time, and so might exit because of a missing protocol that might
6455 no longer be required in a current consensus. Implements proposal
6456 297; closes ticket 27735.
6458 o Minor features (testing):
6459 - Allow a HeartbeatPeriod of less than 30 minutes in testing Tor
6460 networks. Closes ticket 28840. Patch by Rob Jansen.
6462 o Minor bugfixes (client, clock skew):
6463 - Bootstrap successfully even when Tor's clock is behind the clocks
6464 on the authorities. Fixes bug 28591; bugfix on 0.2.0.9-alpha.
6465 - Select guards even if the consensus has expired, as long as the
6466 consensus is still reasonably live. Fixes bug 24661; bugfix
6469 o Minor bugfixes (compilation):
6470 - Compile correctly on OpenBSD; previously, we were missing some
6471 headers required in order to detect it properly. Fixes bug 28938;
6472 bugfix on 0.3.5.1-alpha. Patch from Kris Katterjohn.
6474 o Minor bugfixes (directory clients):
6475 - Mark outdated dirservers when Tor only has a reasonably live
6476 consensus. Fixes bug 28569; bugfix on 0.3.2.5-alpha.
6478 o Minor bugfixes (directory mirrors):
6479 - Even when a directory mirror's clock is behind the clocks on the
6480 authorities, we now allow the mirror to serve "future"
6481 consensuses. Fixes bug 28654; bugfix on 0.3.0.1-alpha.
6483 o Minor bugfixes (DNS):
6484 - Gracefully handle an empty or absent resolve.conf file by falling
6485 back to using "localhost" as a DNS server (and hoping it works).
6486 Previously, we would just stop running as an exit. Fixes bug
6487 21900; bugfix on 0.2.1.10-alpha.
6489 o Minor bugfixes (guards):
6490 - In count_acceptable_nodes(), the minimum number is now one bridge
6491 or guard node, and two non-guard nodes for a circuit. Previously,
6492 we had added up the sum of all nodes with a descriptor, but that
6493 could cause us to build failing circuits when we had either too
6494 many bridges or not enough guard nodes. Fixes bug 25885; bugfix on
6495 0.2.3.1-alpha. Patch by Neel Chauhan.
6497 o Minor bugfixes (IPv6):
6498 - Fix tor_ersatz_socketpair on IPv6-only systems. Previously, the
6499 IPv6 socket was bound using an address family of AF_INET instead
6500 of AF_INET6. Fixes bug 28995; bugfix on 0.3.5.1-alpha. Patch from
6503 o Minor bugfixes (logging):
6504 - Rework rep_hist_log_link_protocol_counts() to iterate through all
6505 link protocol versions when logging incoming/outgoing connection
6506 counts. Tor no longer skips version 5, and we won't have to
6507 remember to update this function when new link protocol version is
6508 developed. Fixes bug 28920; bugfix on 0.2.6.10.
6510 o Minor bugfixes (networking):
6511 - Introduce additional checks into tor_addr_parse() to reject
6512 certain incorrect inputs that previously were not detected. Fixes
6513 bug 23082; bugfix on 0.2.0.10-alpha.
6515 o Minor bugfixes (onion service v3, client):
6516 - Stop logging a "BUG()" warning and stacktrace when we find a SOCKS
6517 connection waiting for a descriptor that we actually have in the
6518 cache. It turns out that this can actually happen, though it is
6519 rare. Now, tor will recover and retry the descriptor. Fixes bug
6520 28669; bugfix on 0.3.2.4-alpha.
6522 o Minor bugfixes (periodic events):
6523 - Refrain from calling routerlist_remove_old_routers() from
6524 check_descriptor_callback(). Instead, create a new hourly periodic
6525 event. Fixes bug 27929; bugfix on 0.2.8.1-alpha.
6527 o Minor bugfixes (pluggable transports):
6528 - Make sure that data is continously read from standard output and
6529 standard error pipes of a pluggable transport child-process, to
6530 avoid deadlocking when a pipe's buffer is full. Fixes bug 26360;
6531 bugfix on 0.2.3.6-alpha.
6533 o Minor bugfixes (unit tests):
6534 - Instead of relying on hs_free_all() to clean up all onion service
6535 objects in test_build_descriptors(), we now deallocate them one by
6536 one. This lets Coverity know that we are not leaking memory there
6537 and fixes CID 1442277. Fixes bug 28989; bugfix on 0.3.5.1-alpha.
6539 o Minor bugfixes (usability):
6540 - Stop saying "Your Guard ..." in pathbias_measure_{use,close}_rate().
6541 Some users took this phrasing to mean that the mentioned guard was
6542 under their control or responsibility, which it is not. Fixes bug
6543 28895; bugfix on Tor 0.3.0.1-alpha.
6545 o Code simplification and refactoring:
6546 - Reimplement NETINFO cell parsing and generation to rely on
6547 trunnel-generated wire format handling code. Closes ticket 27325.
6548 - Remove unnecessary unsafe code from the Rust macro "cstr!". Closes
6550 - Rework SOCKS wire format handling to rely on trunnel-generated
6551 parsing/generation code. Resolves ticket 27620.
6552 - Split out bootstrap progress reporting from control.c into a
6553 separate file. Part of ticket 27402.
6554 - The .may_include files that we use to describe our directory-by-
6555 directory dependency structure now describe a noncircular
6556 dependency graph over the directories that they cover. Our
6557 checkIncludes.py tool now enforces this noncircularity. Closes
6561 - Mention that you cannot add a new onion service if Tor is already
6562 running with Sandbox enabled. Closes ticket 28560.
6563 - Improve ControlPort documentation. Mention that it accepts
6564 address:port pairs, and can be used multiple times. Closes
6566 - Document the exact output of "tor --version". Closes ticket 28889.
6569 - Stop responding to the 'GETINFO status/version/num-concurring' and
6570 'GETINFO status/version/num-versioning' control port commands, as
6571 those were deprecated back in 0.2.0.30. Also stop listing them in
6572 output of 'GETINFO info/names'. Resolves ticket 28757.
6573 - The scripts used to generate and maintain the list of fallback
6574 directories have been extracted into a new "fallback-scripts"
6575 repository. Closes ticket 27914.
6578 - Run shellcheck for scripts in the in scripts/ directory. Closes
6580 - Add unit tests for tokenize_string() and get_next_token()
6581 functions. Resolves ticket 27625.
6583 o Code simplification and refactoring (onion service v3):
6584 - Consolidate the authorized client descriptor cookie computation
6585 code from client and service into one function. Closes
6588 o Code simplification and refactoring (shell scripts):
6589 - Cleanup scan-build.sh to silence shellcheck warnings. Closes
6591 - Fix issues that shellcheck found in chutney-git-bisect.sh.
6592 Resolves ticket 28006.
6593 - Fix issues that shellcheck found in updateRustDependencies.sh.
6594 Resolves ticket 28012.
6595 - Fix shellcheck warnings in cov-diff script. Resolves issue 28009.
6596 - Fix shellcheck warnings in run_calltool.sh. Resolves ticket 28011.
6597 - Fix shellcheck warnings in run_trunnel.sh. Resolves issue 28010.
6598 - Fix shellcheck warnings in scripts/test/coverage. Resolves
6602 Changes in version 0.3.3.11 - 2019-01-07
6603 Tor 0.3.3.11 backports numerous fixes from later versions of Tor.
6604 numerous fixes, including an important fix for anyone using OpenSSL
6605 1.1.1. Anyone running an earlier version of Tor 0.3.3 should upgrade
6606 to this version, or to a later series.
6608 As a reminder, support the Tor 0.3.3 series will end on 22 Feb 2019.
6609 We anticipate that this will be the last release of Tor 0.3.3, unless
6610 some major bug is before then. Some time between now and then, users
6611 should switch to either the Tor 0.3.4 series (supported until at least
6612 10 June 2019), or the Tor 0.3.5 series, which will receive long-term
6613 support until at least 1 Feb 2022.
6615 o Major bugfixes (OpenSSL, portability, backport from 0.3.5.5-alpha):
6616 - Fix our usage of named groups when running as a TLS 1.3 client in
6617 OpenSSL 1.1.1. Previously, we only initialized EC groups when
6618 running as a relay, which caused clients to fail to negotiate TLS
6619 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
6622 o Major bugfixes (restart-in-process, backport from 0.3.5.1-alpha):
6623 - Fix a use-after-free error that could be caused by passing Tor an
6624 impossible set of options that would fail during options_act().
6625 Fixes bug 27708; bugfix on 0.3.3.1-alpha.
6627 o Minor features (continuous integration, backport from 0.3.5.1-alpha):
6628 - Only run one online rust build in Travis, to reduce network
6629 errors. Skip offline rust builds on Travis for Linux gcc, because
6630 they're redundant. Implements ticket 27252.
6631 - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
6632 duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
6633 Linux with default settings, because all the non-default builds
6634 use gcc on Linux. Implements ticket 27252.
6636 o Minor features (continuous integration, backport from 0.3.5.3-alpha):
6637 - Use the Travis Homebrew addon to install packages on macOS during
6638 Travis CI. The package list is the same, but the Homebrew addon
6639 does not do a `brew update` by default. Implements ticket 27738.
6641 o Minor features (fallback directory list, backport from 0.3.5.6-rc):
6642 - Replace the 150 fallbacks originally introduced in Tor
6643 0.3.3.1-alpha in January 2018 (of which ~115 were still
6644 functional), with a list of 157 fallbacks (92 new, 65 existing, 85
6645 removed) generated in December 2018. Closes ticket 24803.
6647 o Minor features (geoip):
6648 - Update geoip and geoip6 to the January 3 2019 Maxmind GeoLite2
6649 Country database. Closes ticket 29012.
6651 o Minor features (OpenSSL bug workaround, backport from 0.3.5.7):
6652 - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
6653 key export function from handling long labels. When this bug is
6654 detected, Tor will disable TLS 1.3. We recommend upgrading to a
6655 version of OpenSSL without this bug when it becomes available.
6656 Closes ticket 28973.
6658 o Minor bugfixes (relay statistics, backport from 0.3.5.7):
6659 - Update relay descriptor on bandwidth changes only when the uptime
6660 is smaller than 24h, in order to reduce the efficiency of guard
6661 discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
6663 o Minor bugfixes (C correctness, backport from 0.3.5.4-alpha):
6664 - Avoid undefined behavior in an end-of-string check when parsing
6665 the BEGIN line in a directory object. Fixes bug 28202; bugfix
6668 o Minor bugfixes (code safety, backport from 0.3.5.3-alpha):
6669 - Rewrite our assertion macros so that they no longer suppress the
6670 compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
6672 o Minor bugfixes (compilation, backport from 0.3.5.5-alpha):
6673 - Initialize a variable unconditionally in aes_new_cipher(), since
6674 some compilers cannot tell that we always initialize it before
6675 use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
6677 o Minor bugfixes (directory authority, backport from 0.3.5.4-alpha):
6678 - Log additional info when we get a relay that shares an ed25519 ID
6679 with a different relay, instead making a BUG() warning. Fixes bug
6680 27800; bugfix on 0.3.2.1-alpha.
6682 o Minor bugfixes (directory permissions, backport form 0.3.5.3-alpha):
6683 - When a user requests a group-readable DataDirectory, give it to
6684 them. Previously, when the DataDirectory and the CacheDirectory
6685 were the same, the default setting (0) for
6686 CacheDirectoryGroupReadable would override the setting for
6687 DataDirectoryGroupReadable. Fixes bug 26913; bugfix
6690 o Minor bugfixes (onion service v3, backport from 0.3.5.1-alpha):
6691 - When the onion service directory can't be created or has the wrong
6692 permissions, do not log a stack trace. Fixes bug 27335; bugfix
6695 o Minor bugfixes (onion service v3, backport from 0.3.5.2-alpha):
6696 - Close all SOCKS request (for the same .onion) if the newly fetched
6697 descriptor is unusable. Before that, we would close only the first
6698 one leaving the other hanging and let to time out by themselves.
6699 Fixes bug 27410; bugfix on 0.3.2.1-alpha.
6701 o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
6702 - Don't warn so loudly when Tor is unable to decode an onion
6703 descriptor. This can now happen as a normal use case if a client
6704 gets a descriptor with client authorization but the client is not
6705 authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
6707 o Minor bugfixes (onion service v3, backport from 0.3.5.6-rc):
6708 - When deleting an ephemeral onion service (DEL_ONION), do not close
6709 any rendezvous circuits in order to let the existing client
6710 connections finish by themselves or closed by the application. The
6711 HS v2 is doing that already so now we have the same behavior for
6712 all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
6714 o Minor bugfixes (HTTP tunnel):
6715 - Fix a bug warning when closing an HTTP tunnel connection due to
6716 an HTTP request we couldn't handle. Fixes bug 26470; bugfix on
6719 o Minor bugfixes (memory leaks, backport from 0.3.5.5-alpha):
6720 - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
6721 bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
6723 o Minor bugfixes (netflow padding, backport from 0.3.5.1-alpha):
6724 - Ensure circuitmux queues are empty before scheduling or sending
6725 padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
6727 o Minor bugfixes (protover, backport from 0.3.5.3-alpha):
6728 - Reject protocol names containing bytes other than alphanumeric
6729 characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
6732 o Minor bugfixes (rust, backport from 0.3.5.1-alpha):
6733 - Compute protover votes correctly in the rust version of the
6734 protover code. Previously, the protover rewrite in 24031 allowed
6735 repeated votes from the same voter for the same protocol version
6736 to be counted multiple times in protover_compute_vote(). Fixes bug
6737 27649; bugfix on 0.3.3.5-rc.
6738 - Reject protover names that contain invalid characters. Fixes bug
6739 27687; bugfix on 0.3.3.1-alpha.
6741 o Minor bugfixes (rust, backport from 0.3.5.2-alpha):
6742 - protover_all_supported() would attempt to allocate up to 16GB on
6743 some inputs, leading to a potential memory DoS. Fixes bug 27206;
6744 bugfix on 0.3.3.5-rc.
6746 o Minor bugfixes (rust, backport from 0.3.5.4-alpha):
6747 - Fix a potential null dereference in protover_all_supported(). Add
6748 a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
6749 - Return a string that can be safely freed by C code, not one
6750 created by the rust allocator, in protover_all_supported(). Fixes
6751 bug 27740; bugfix on 0.3.3.1-alpha.
6752 - Fix an API mismatch in the rust implementation of
6753 protover_compute_vote(). This bug could have caused crashes on any
6754 directory authorities running Tor with Rust (which we do not yet
6755 recommend). Fixes bug 27741; bugfix on 0.3.3.6.
6757 o Minor bugfixes (testing, backport from 0.3.5.1-alpha):
6758 - If a unit test running in a subprocess exits abnormally or with a
6759 nonzero status code, treat the test as having failed, even if the
6760 test reported success. Without this fix, memory leaks don't cause
6761 the tests to fail, even with LeakSanitizer. Fixes bug 27658;
6762 bugfix on 0.2.2.4-alpha.
6764 o Minor bugfixes (testing, backport from 0.3.5.4-alpha):
6765 - Treat backtrace test failures as expected on BSD-derived systems
6766 (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
6767 (FreeBSD failures have been treated as expected since 18204 in
6768 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
6770 o Minor bugfixes (unit tests, guard selection, backport from 0.3.5.6-rc):
6771 - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
6772 bugfix on 0.3.0.1-alpha.
6775 Changes in version 0.3.4.10 - 2019-01-07
6776 Tor 0.3.4.9 is the second stable release in its series; it backports
6777 numerous fixes, including an important fix for relays, and for anyone
6778 using OpenSSL 1.1.1. Anyone running an earlier version of Tor 0.3.4
6781 As a reminder, the Tor 0.3.4 series will be supported until 10 June
6782 2019. Some time between now and then, users should switch to the Tor
6783 0.3.5 series, which will receive long-term support until at least 1
6786 o Major bugfixes (OpenSSL, portability, backport from 0.3.5.5-alpha):
6787 - Fix our usage of named groups when running as a TLS 1.3 client in
6788 OpenSSL 1.1.1. Previously, we only initialized EC groups when
6789 running as a relay, which caused clients to fail to negotiate TLS
6790 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
6793 o Major bugfixes (relay, directory, backport from 0.3.5.7):
6794 - Always reactivate linked connections in the main loop so long as
6795 any linked connection has been active. Previously, connections
6796 serving directory information wouldn't get reactivated after the
6797 first chunk of data was sent (usually 32KB), which would prevent
6798 clients from bootstrapping. Fixes bug 28912; bugfix on
6799 0.3.4.1-alpha. Patch by "cypherpunks3".
6801 o Minor features (continuous integration, Windows, backport from 0.3.5.6-rc):
6802 - Always show the configure and test logs, and upload them as build
6803 artifacts, when building for Windows using Appveyor CI.
6806 o Minor features (controller, backport from 0.3.5.1-alpha):
6807 - For purposes of CIRC_BW-based dropped cell detection, track half-
6808 closed stream ids, and allow their ENDs, SENDMEs, DATA and path
6809 bias check cells to arrive without counting it as dropped until
6810 either the END arrives, or the windows are empty. Closes
6813 o Minor features (fallback directory list, backport from 0.3.5.6-rc):
6814 - Replace the 150 fallbacks originally introduced in Tor
6815 0.3.3.1-alpha in January 2018 (of which ~115 were still
6816 functional), with a list of 157 fallbacks (92 new, 65 existing, 85
6817 removed) generated in December 2018. Closes ticket 24803.
6819 o Minor features (geoip):
6820 - Update geoip and geoip6 to the November 6 2018 Maxmind GeoLite2
6821 Country database. Closes ticket 28395.
6823 o Minor features (OpenSSL bug workaround, backport from 0.3.5.7):
6824 - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
6825 key export function from handling long labels. When this bug is
6826 detected, Tor will disable TLS 1.3. We recommend upgrading to a
6827 version of OpenSSL without this bug when it becomes available.
6828 Closes ticket 28973.
6830 o Minor bugfixes (compilation, backport from 0.3.5.5-alpha):
6831 - Initialize a variable unconditionally in aes_new_cipher(), since
6832 some compilers cannot tell that we always initialize it before
6833 use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
6835 o Minor bugfixes (connection, relay, backport from 0.3.5.5-alpha):
6836 - Avoid a logging a BUG() stacktrace when closing connection held
6837 open because the write side is rate limited but not the read side.
6838 Now, the connection read side is simply shut down until Tor is
6839 able to flush the connection and close it. Fixes bug 27750; bugfix
6842 o Minor bugfixes (continuous integration, Windows, backport from 0.3.5.5-alpha):
6843 - Manually configure the zstd compiler options, when building using
6844 mingw on Appveyor Windows CI. The MSYS2 mingw zstd package does
6845 not come with a pkg-config file. Fixes bug 28454; bugfix
6847 - Stop using an external OpenSSL install, and stop installing MSYS2
6848 packages, when building using mingw on Appveyor Windows CI. Fixes
6849 bug 28399; bugfix on 0.3.4.1-alpha.
6851 o Minor bugfixes (continuous integration, Windows, backport from 0.3.5.6-rc):
6852 - Explicitly specify the path to the OpenSSL library and do not
6853 download OpenSSL from Pacman, but instead use the library that is
6854 already provided by AppVeyor. Fixes bug 28574; bugfix on master.
6856 o Minor bugfixes (directory permissions, backport form 0.3.5.3-alpha):
6857 - When a user requests a group-readable DataDirectory, give it to
6858 them. Previously, when the DataDirectory and the CacheDirectory
6859 were the same, the default setting (0) for
6860 CacheDirectoryGroupReadable would override the setting for
6861 DataDirectoryGroupReadable. Fixes bug 26913; bugfix
6864 o Minor bugfixes (memory leaks, backport from 0.3.5.5-alpha):
6865 - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
6866 bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
6868 o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
6869 - Don't warn so loudly when Tor is unable to decode an onion
6870 descriptor. This can now happen as a normal use case if a client
6871 gets a descriptor with client authorization but the client is not
6872 authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
6874 o Minor bugfixes (onion service v3, backport from 0.3.5.6-rc):
6875 - When deleting an ephemeral onion service (DEL_ONION), do not close
6876 any rendezvous circuits in order to let the existing client
6877 connections finish by themselves or closed by the application. The
6878 HS v2 is doing that already so now we have the same behavior for
6879 all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
6881 o Minor bugfixes (relay statistics, backport from 0.3.5.7):
6882 - Update relay descriptor on bandwidth changes only when the uptime
6883 is smaller than 24h, in order to reduce the efficiency of guard
6884 discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
6886 o Minor bugfixes (unit tests, guard selection, backport from 0.3.5.6-rc):
6887 - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
6888 bugfix on 0.3.0.1-alpha.
6891 Changes in version 0.3.5.7 - 2019-01-07
6892 Tor 0.3.5.7 is the first stable release in its series; it includes
6893 compilation and portability fixes, and a fix for a severe problem
6894 affecting directory caches.
6896 The Tor 0.3.5 series includes several new features and performance
6897 improvements, including client authorization for v3 onion services,
6898 cleanups to bootstrap reporting, support for improved bandwidth-
6899 measurement tools, experimental support for NSS in place of OpenSSL,
6900 and much more. It also begins a full reorganization of Tor's code
6901 layout, for improved modularity and maintainability in the future.
6902 Finally, there is the usual set of performance improvements and
6903 bugfixes that we try to do in every release series.
6905 There are a couple of changes in the 0.3.5 that may affect
6906 compatibility. First, the default version for newly created onion
6907 services is now v3. Use the HiddenServiceVersion option if you want to
6908 override this. Second, some log messages related to bootstrapping have
6909 changed; if you use stem, you may need to update to the latest version
6910 so it will recognize them.
6912 We have designated 0.3.5 as a "long-term support" (LTS) series: we
6913 will continue to patch major bugs in typical configurations of 0.3.5
6914 until at least 1 Feb 2022. (We do not plan to provide long-term
6915 support for embedding, Rust support, NSS support, running a directory
6916 authority, or unsupported platforms. For these, you will need to stick
6917 with the latest stable release.)
6919 Below are the changes since 0.3.5.6-rc. For a complete list of changes
6920 since 0.3.4.9, see the ReleaseNotes file.
6922 o Major bugfixes (relay, directory):
6923 - Always reactivate linked connections in the main loop so long as
6924 any linked connection has been active. Previously, connections
6925 serving directory information wouldn't get reactivated after the
6926 first chunk of data was sent (usually 32KB), which would prevent
6927 clients from bootstrapping. Fixes bug 28912; bugfix on
6928 0.3.4.1-alpha. Patch by "cypherpunks3".
6930 o Minor features (compilation):
6931 - When possible, place our warning flags in a separate file, to
6932 avoid flooding verbose build logs. Closes ticket 28924.
6934 o Minor features (geoip):
6935 - Update geoip and geoip6 to the January 3 2019 Maxmind GeoLite2
6936 Country database. Closes ticket 29012.
6938 o Minor features (OpenSSL bug workaround):
6939 - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
6940 key export function from handling long labels. When this bug is
6941 detected, Tor will disable TLS 1.3. We recommend upgrading to a
6942 version of OpenSSL without this bug when it becomes available.
6943 Closes ticket 28973.
6945 o Minor features (performance):
6946 - Remove about 96% of the work from the function that we run at
6947 startup to test our curve25519_basepoint implementation. Since
6948 this function has yet to find an actual failure, we now only run
6949 it for 8 iterations instead of 200. Based on our profile
6950 information, this change should save around 8% of our startup time
6951 on typical desktops, and may have a similar effect on other
6952 platforms. Closes ticket 28838.
6953 - Stop re-validating our hardcoded Diffie-Hellman parameters on
6954 every startup. Doing this wasted time and cycles, especially on
6955 low-powered devices. Closes ticket 28851.
6957 o Minor bugfixes (compilation):
6958 - Fix compilation for Android by adding a missing header to
6959 freespace.c. Fixes bug 28974; bugfix on 0.3.5.1-alpha.
6961 o Minor bugfixes (correctness):
6962 - Fix an unreached code path where we checked the value of
6963 "hostname" inside send_resolved_hostname_cell(). Previously, we
6964 used it before checking it; now we check it first. Fixes bug
6965 28879; bugfix on 0.1.2.7-alpha.
6967 o Minor bugfixes (testing):
6968 - Make sure that test_rebind.py actually obeys its timeout, even
6969 when it receives a large number of log messages. Fixes bug 28883;
6970 bugfix on 0.3.5.4-alpha.
6971 - Stop running stem's unit tests as part of "make test-stem", but
6972 continue to run stem's unit and online tests during "make test-
6973 stem-full". Fixes bug 28568; bugfix on 0.2.6.3-alpha.
6975 o Minor bugfixes (windows services):
6976 - Make Tor start correctly as an NT service again: previously it was
6977 broken by refactoring. Fixes bug 28612; bugfix on 0.3.5.3-alpha.
6979 o Code simplification and refactoring:
6980 - When parsing a port configuration, make it more obvious to static
6981 analyzer tools that we always initialize the address. Closes
6985 Changes in version 0.3.5.6-rc - 2018-12-18
6986 Tor 0.3.5.6-rc fixes numerous small bugs in earlier versions of Tor.
6987 It is the first release candidate in the 0.3.5.x series; if no further
6988 huge bugs are found, our next release may be the stable 0.3.5.x.
6990 o Minor features (continuous integration, Windows):
6991 - Always show the configure and test logs, and upload them as build
6992 artifacts, when building for Windows using Appveyor CI.
6995 o Minor features (fallback directory list):
6996 - Replace the 150 fallbacks originally introduced in Tor
6997 0.3.3.1-alpha in January 2018 (of which ~115 were still
6998 functional), with a list of 157 fallbacks (92 new, 65 existing, 85
6999 removed) generated in December 2018. Closes ticket 24803.
7001 o Minor features (geoip):
7002 - Update geoip and geoip6 to the December 5 2018 Maxmind GeoLite2
7003 Country database. Closes ticket 28744.
7005 o Minor bugfixes (compilation):
7006 - Add missing dependency on libgdi32.dll for tor-print-ed-signing-
7007 cert.exe on Windows. Fixes bug 28485; bugfix on 0.3.5.1-alpha.
7009 o Minor bugfixes (continuous integration, Windows):
7010 - Explicitly specify the path to the OpenSSL library and do not
7011 download OpenSSL from Pacman, but instead use the library that is
7012 already provided by AppVeyor. Fixes bug 28574; bugfix on master.
7014 o Minor bugfixes (onion service v3):
7015 - When deleting an ephemeral onion service (DEL_ONION), do not close
7016 any rendezvous circuits in order to let the existing client
7017 connections finish by themselves or closed by the application. The
7018 HS v2 is doing that already so now we have the same behavior for
7019 all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
7021 o Minor bugfixes (restart-in-process, boostrap):
7022 - Add missing resets of bootstrap tracking state when shutting down
7023 (regression caused by ticket 27169). Fixes bug 28524; bugfix
7026 o Minor bugfixes (testing):
7027 - Use a separate DataDirectory for the test_rebind script.
7028 Previously, this script would run using the default DataDirectory,
7029 and sometimes fail. Fixes bug 28562; bugfix on 0.3.5.1-alpha.
7030 Patch from Taylor R Campbell.
7031 - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
7032 bugfix on 0.3.0.1-alpha.
7034 o Minor bugfixes (Windows):
7035 - Correctly identify Windows 8.1, Windows 10, and Windows Server
7036 2008 and later from their NT versions. Fixes bug 28096; bugfix on
7037 0.2.2.34; reported by Keifer Bly.
7038 - On recent Windows versions, the GetVersionEx() function may report
7039 an earlier Windows version than the running OS. To avoid user
7040 confusion, add "[or later]" to Tor's version string on affected
7041 versions of Windows. Fixes bug 28096; bugfix on 0.2.2.34; reported
7043 - Remove Windows versions that were never supported by the
7044 GetVersionEx() function. Stop duplicating the latest Windows
7045 version in get_uname(). Fixes bug 28096; bugfix on 0.2.2.34;
7046 reported by Keifer Bly.
7049 - Increase logging and tag all log entries with timestamps in
7050 test_rebind.py. Provides diagnostics for issue 28229.
7052 o Code simplification and refactoring (shared random, dirauth):
7053 - Change many tor_assert() to use BUG() instead. The idea is to not
7054 crash a dirauth but rather scream loudly with a stacktrace and let
7055 it continue run. The shared random subsystem is very resilient and
7056 if anything wrong happens with it, at worst a non coherent value
7057 will be put in the vote and discarded by the other authorities.
7058 Closes ticket 19566.
7060 o Documentation (onion services):
7061 - Document in the man page that changing ClientOnionAuthDir value or
7062 adding a new file in the directory will not work at runtime upon
7063 sending a HUP if Sandbox 1. Closes ticket 28128.
7064 - Note in the man page that the only real way to fully revoke an
7065 onion service v3 client authorization is by restarting the tor
7066 process. Closes ticket 28275.
7069 Changes in version 0.3.5.5-alpha - 2018-11-16
7070 Tor 0.3.5.5-alpha includes numerous bugfixes on earlier releases,
7071 including several that we hope to backport to older release series in
7074 o Major bugfixes (OpenSSL, portability):
7075 - Fix our usage of named groups when running as a TLS 1.3 client in
7076 OpenSSL 1.1.1. Previously, we only initialized EC groups when
7077 running as a relay, which caused clients to fail to negotiate TLS
7078 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
7081 o Minor features (geoip):
7082 - Update geoip and geoip6 to the November 6 2018 Maxmind GeoLite2
7083 Country database. Closes ticket 28395.
7085 o Minor bugfixes (compilation):
7086 - Initialize a variable unconditionally in aes_new_cipher(), since
7087 some compilers cannot tell that we always initialize it before
7088 use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
7090 o Minor bugfixes (connection, relay):
7091 - Avoid a logging a BUG() stacktrace when closing connection held
7092 open because the write side is rate limited but not the read side.
7093 Now, the connection read side is simply shut down until Tor is
7094 able to flush the connection and close it. Fixes bug 27750; bugfix
7097 o Minor bugfixes (continuous integration, Windows):
7098 - Manually configure the zstd compiler options, when building using
7099 mingw on Appveyor Windows CI. The MSYS2 mingw zstd package does
7100 not come with a pkg-config file. Fixes bug 28454; bugfix
7102 - Stop using an external OpenSSL install, and stop installing MSYS2
7103 packages, when building using mingw on Appveyor Windows CI. Fixes
7104 bug 28399; bugfix on 0.3.4.1-alpha.
7106 o Minor bugfixes (documentation):
7107 - Make Doxygen work again after the code movement in the 0.3.5
7108 source tree. Fixes bug 28435; bugfix on 0.3.5.1-alpha.
7110 o Minor bugfixes (Linux seccomp2 sandbox):
7111 - Permit the "shutdown()" system call, which is apparently used by
7112 OpenSSL under some circumstances. Fixes bug 28183; bugfix
7115 o Minor bugfixes (logging):
7116 - Stop talking about the Named flag in log messages. Clients have
7117 ignored the Named flag since 0.3.2. Fixes bug 28441; bugfix
7120 o Minor bugfixes (memory leaks):
7121 - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
7122 bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
7124 o Minor bugfixes (onion services):
7125 - On an intro point for a version 3 onion service, stop closing
7126 introduction circuits on an NACK. This lets the client decide
7127 whether to reuse the circuit or discard it. Previously, we closed
7128 intro circuits when sending NACKs. Fixes bug 27841; bugfix on
7129 0.3.2.1-alpha. Patch by Neel Chaunan.
7130 - When replacing a descriptor in the client cache, make sure to
7131 close all client introduction circuits for the old descriptor, so
7132 we don't end up with unusable leftover circuits. Fixes bug 27471;
7133 bugfix on 0.3.2.1-alpha.
7136 Changes in version 0.3.5.4-alpha - 2018-11-08
7137 Tor 0.3.5.4-alpha includes numerous bugfixes on earlier versions and
7138 improves our continuous integration support. It continues our attempts
7139 to stabilize this alpha branch and build it into a foundation for an
7140 acceptable long-term-support release.
7142 o Major bugfixes (compilation, rust):
7143 - Rust tests can now build and run successfully with the
7144 --enable-fragile-hardening option enabled. Doing this currently
7145 requires the rust beta channel; it will be possible with stable
7146 rust once Rust version 1.31 is released. Patch from Alex Crichton.
7147 Fixes bugs 27272, 27273, and 27274. Bugfix on 0.3.1.1-alpha.
7149 o Major bugfixes (embedding, main loop):
7150 - When DisableNetwork becomes set, actually disable periodic events
7151 that are already enabled. (Previously, we would refrain from
7152 enabling new ones, but we would leave the old ones turned on.)
7153 Fixes bug 28348; bugfix on 0.3.4.1-alpha.
7155 o Minor features (continuous integration):
7156 - Add a Travis CI build for --enable-nss on Linux gcc. Closes
7158 - Add new CI job to Travis configuration to run stem-based
7159 integration tests. Closes ticket 27913.
7161 o Minor features (Windows, continuous integration):
7162 - Build tor on Windows Server 2012 R2 and Windows Server 2016 using
7163 Appveyor's CI. Closes ticket 28318.
7165 o Minor bugfixes (C correctness, also in 0.3.4.9):
7166 - Avoid undefined behavior in an end-of-string check when parsing
7167 the BEGIN line in a directory object. Fixes bug 28202; bugfix
7170 o Minor bugfixes (compilation):
7171 - Fix a pair of missing headers on OpenBSD. Fixes bug 28303; bugfix
7172 on 0.3.5.1-alpha. Patch from Kris Katterjohn.
7174 o Minor bugfixes (compilation, OpenSolaris):
7175 - Fix compilation on OpenSolaris and its descendants by adding a
7176 missing include to compat_pthreads.c. Fixes bug 27963; bugfix
7179 o Minor bugfixes (configuration):
7180 - Refuse to start with relative file paths and RunAsDaemon set
7181 (regression from the fix for bug 22731). Fixes bug 28298; bugfix
7184 o Minor bugfixes (directory authority, also in 0.3.4.9):
7185 - Log additional info when we get a relay that shares an ed25519 ID
7186 with a different relay, instead of a BUG() warning with a
7187 backtrace. Fixes bug 27800; bugfix on 0.3.2.1-alpha.
7189 o Minor bugfixes (onion service v3):
7190 - Build the service descriptor's signing key certificate before
7191 uploading, so we always have a fresh one: leaving no chances for
7192 it to expire service side. Fixes bug 27838; bugfix
7195 o Minor bugfixes (onion service v3, client authorization):
7196 - Fix an assert() when adding a client authorization for the first
7197 time and then sending a HUP signal to the service. Before that,
7198 Tor would stop abruptly. Fixes bug 27995; bugfix on 0.3.5.1-alpha.
7200 o Minor bugfixes (onion services):
7201 - Unless we have explicitly set HiddenServiceVersion, detect the
7202 onion service version and then look for invalid options.
7203 Previously, we did the reverse, but that broke existing configs
7204 which were pointed to a v2 service and had options like
7205 HiddenServiceAuthorizeClient set. Fixes bug 28127; bugfix on
7206 0.3.5.1-alpha. Patch by Neel Chauhan.
7208 o Minor bugfixes (portability):
7209 - Make the OPE code (which is used for v3 onion services) run
7210 correctly on big-endian platforms. Fixes bug 28115; bugfix
7213 o Minor bugfixes (protover, rust):
7214 - Reject extra commas in version strings. Fixes bug 27197; bugfix
7217 o Minor bugfixes (relay shutdown, systemd):
7218 - Notify systemd of ShutdownWaitLength so it can be set to longer
7219 than systemd's TimeoutStopSec. In Tor's systemd service file, set
7220 TimeoutSec to 60 seconds to allow Tor some time to shut down.
7221 Fixes bug 28113; bugfix on 0.2.6.2-alpha.
7223 o Minor bugfixes (rust, also in 0.3.4.9):
7224 - Fix a potential null dereference in protover_all_supported(). Add
7225 a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
7226 - Return a string that can be safely freed by C code, not one
7227 created by the rust allocator, in protover_all_supported(). Fixes
7228 bug 27740; bugfix on 0.3.3.1-alpha.
7230 o Minor bugfixes (rust, directory authority, also in 0.3.4.9):
7231 - Fix an API mismatch in the rust implementation of
7232 protover_compute_vote(). This bug could have caused crashes on any
7233 directory authorities running Tor with Rust (which we do not yet
7234 recommend). Fixes bug 27741; bugfix on 0.3.3.6.
7236 o Minor bugfixes (testing):
7237 - Avoid hangs and race conditions in test_rebind.py. Fixes bug
7238 27968; bugfix on 0.3.5.1-alpha.
7240 o Minor bugfixes (testing, also in 0.3.4.9):
7241 - Treat backtrace test failures as expected on BSD-derived systems
7242 (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
7243 (FreeBSD failures have been treated as expected since 18204 in
7244 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
7246 o Documentation (onion service manpage):
7247 - Improve HSv3 client authorization by making some options more
7248 explicit and detailed. Closes ticket 28026. Patch by Mike Tigas.
7251 Changes in version 0.3.4.9 - 2018-11-02
7252 Tor 0.3.4.9 is the second stable release in its series; it backports
7253 numerous fixes, including a fix for a bandwidth management bug that
7254 was causing memory exhaustion on relays. Anyone running an earlier
7255 version of Tor 0.3.4.9 should upgrade.
7257 o Major bugfixes (compilation, backport from 0.3.5.3-alpha):
7258 - Fix compilation on ARM (and other less-used CPUs) when compiling
7259 with OpenSSL before 1.1. Fixes bug 27781; bugfix on 0.3.4.1-alpha.
7261 o Major bugfixes (mainloop, bootstrap, backport from 0.3.5.3-alpha):
7262 - Make sure Tor bootstraps and works properly if only the
7263 ControlPort is set. Prior to this fix, Tor would only bootstrap
7264 when a client port was set (Socks, Trans, NATD, DNS or HTTPTunnel
7265 port). Fixes bug 27849; bugfix on 0.3.4.1-alpha.
7267 o Major bugfixes (relay, backport from 0.3.5.3-alpha):
7268 - When our write bandwidth limit is exhausted, stop writing on the
7269 connection. Previously, we had a typo in the code that would make
7270 us stop reading instead, leading to relay connections being stuck
7271 indefinitely and consuming kernel RAM. Fixes bug 28089; bugfix
7274 o Major bugfixes (restart-in-process, backport from 0.3.5.1-alpha):
7275 - Fix a use-after-free error that could be caused by passing Tor an
7276 impossible set of options that would fail during options_act().
7277 Fixes bug 27708; bugfix on 0.3.3.1-alpha.
7279 o Minor features (continuous integration, backport from 0.3.5.1-alpha):
7280 - Don't do a distcheck with --disable-module-dirauth in Travis.
7281 Implements ticket 27252.
7282 - Only run one online rust build in Travis, to reduce network
7283 errors. Skip offline rust builds on Travis for Linux gcc, because
7284 they're redundant. Implements ticket 27252.
7285 - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
7286 duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
7287 Linux with default settings, because all the non-default builds
7288 use gcc on Linux. Implements ticket 27252.
7290 o Minor features (continuous integration, backport from 0.3.5.3-alpha):
7291 - Use the Travis Homebrew addon to install packages on macOS during
7292 Travis CI. The package list is the same, but the Homebrew addon
7293 does not do a `brew update` by default. Implements ticket 27738.
7295 o Minor features (geoip):
7296 - Update geoip and geoip6 to the October 9 2018 Maxmind GeoLite2
7297 Country database. Closes ticket 27991.
7299 o Minor bugfixes (32-bit OSX and iOS, timing, backport from 0.3.5.2-alpha):
7300 - Fix an integer overflow bug in our optimized 32-bit millisecond-
7301 difference algorithm for 32-bit Apple platforms. Previously, it
7302 would overflow when calculating the difference between two times
7303 more than 47 days apart. Fixes part of bug 27139; bugfix
7305 - Improve the precision of our 32-bit millisecond difference
7306 algorithm for 32-bit Apple platforms. Fixes part of bug 27139;
7307 bugfix on 0.3.4.1-alpha.
7308 - Relax the tolerance on the mainloop/update_time_jumps test when
7309 running on 32-bit Apple platforms. Fixes part of bug 27139; bugfix
7312 o Minor bugfixes (C correctness, to appear in 0.3.5.4-alpha):
7313 - Avoid undefined behavior in an end-of-string check when parsing
7314 the BEGIN line in a directory object. Fixes bug 28202; bugfix
7317 o Minor bugfixes (CI, appveyor, to appear in 0.3.5.4-alpha):
7318 - Only install the necessary mingw packages during our appveyor
7319 builds. This change makes the build a little faster, and prevents
7320 a conflict with a preinstalled mingw openssl that appveyor now
7321 ships. Fixes bugs 27943 and 27765; bugfix on 0.3.4.2-alpha.
7323 o Minor bugfixes (code safety, backport from 0.3.5.3-alpha):
7324 - Rewrite our assertion macros so that they no longer suppress the
7325 compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
7327 o Minor bugfixes (continuous integration, backport from 0.3.5.1-alpha):
7328 - Stop reinstalling identical packages in our Windows CI. Fixes bug
7329 27464; bugfix on 0.3.4.1-alpha.
7331 o Minor bugfixes (directory authority, to appear in 0.3.5.4-alpha):
7332 - Log additional info when we get a relay that shares an ed25519 ID
7333 with a different relay, instead making a BUG() warning. Fixes bug
7334 27800; bugfix on 0.3.2.1-alpha.
7336 o Minor bugfixes (directory connection shutdown, backport from 0.3.5.1-alpha):
7337 - Avoid a double-close when shutting down a stalled directory
7338 connection. Fixes bug 26896; bugfix on 0.3.4.1-alpha.
7340 o Minor bugfixes (HTTP tunnel, backport from 0.3.5.1-alpha):
7341 - Fix a bug warning when closing an HTTP tunnel connection due to an
7342 HTTP request we couldn't handle. Fixes bug 26470; bugfix
7345 o Minor bugfixes (netflow padding, backport from 0.3.5.1-alpha):
7346 - Ensure circuitmux queues are empty before scheduling or sending
7347 padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
7349 o Minor bugfixes (onion service v3, backport from 0.3.5.1-alpha):
7350 - When the onion service directory can't be created or has the wrong
7351 permissions, do not log a stack trace. Fixes bug 27335; bugfix
7354 o Minor bugfixes (onion service v3, backport from 0.3.5.2-alpha):
7355 - Close all SOCKS request (for the same .onion) if the newly fetched
7356 descriptor is unusable. Before that, we would close only the first
7357 one leaving the other hanging and let to time out by themselves.
7358 Fixes bug 27410; bugfix on 0.3.2.1-alpha.
7360 o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
7361 - When selecting a v3 rendezvous point, don't only look at the
7362 protover, but also check whether the curve25519 onion key is
7363 present. This way we avoid picking a relay that supports the v3
7364 rendezvous but for which we don't have the microdescriptor. Fixes
7365 bug 27797; bugfix on 0.3.2.1-alpha.
7367 o Minor bugfixes (protover, backport from 0.3.5.3-alpha):
7368 - Reject protocol names containing bytes other than alphanumeric
7369 characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
7372 o Minor bugfixes (rust, backport from 0.3.5.1-alpha):
7373 - Compute protover votes correctly in the rust version of the
7374 protover code. Previously, the protover rewrite in 24031 allowed
7375 repeated votes from the same voter for the same protocol version
7376 to be counted multiple times in protover_compute_vote(). Fixes bug
7377 27649; bugfix on 0.3.3.5-rc.
7378 - Reject protover names that contain invalid characters. Fixes bug
7379 27687; bugfix on 0.3.3.1-alpha.
7381 o Minor bugfixes (rust, backport from 0.3.5.2-alpha):
7382 - protover_all_supported() would attempt to allocate up to 16GB on
7383 some inputs, leading to a potential memory DoS. Fixes bug 27206;
7384 bugfix on 0.3.3.5-rc.
7386 o Minor bugfixes (rust, directory authority, to appear in 0.3.5.4-alpha):
7387 - Fix an API mismatch in the rust implementation of
7388 protover_compute_vote(). This bug could have caused crashes on any
7389 directory authorities running Tor with Rust (which we do not yet
7390 recommend). Fixes bug 27741; bugfix on 0.3.3.6.
7392 o Minor bugfixes (rust, to appear in 0.3.5.4-alpha):
7393 - Fix a potential null dereference in protover_all_supported(). Add
7394 a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
7395 - Return a string that can be safely freed by C code, not one
7396 created by the rust allocator, in protover_all_supported(). Fixes
7397 bug 27740; bugfix on 0.3.3.1-alpha.
7399 o Minor bugfixes (testing, backport from 0.3.5.1-alpha):
7400 - If a unit test running in a subprocess exits abnormally or with a
7401 nonzero status code, treat the test as having failed, even if the
7402 test reported success. Without this fix, memory leaks don't cause
7403 the tests to fail, even with LeakSanitizer. Fixes bug 27658;
7404 bugfix on 0.2.2.4-alpha.
7406 o Minor bugfixes (testing, backport from 0.3.5.3-alpha):
7407 - Make the hs_service tests use the same time source when creating
7408 the introduction point and when testing it. Now tests work better
7409 on very slow systems like ARM or Travis. Fixes bug 27810; bugfix
7412 o Minor bugfixes (testing, to appear in 0.3.5.4-alpha):
7413 - Treat backtrace test failures as expected on BSD-derived systems
7414 (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
7415 (FreeBSD failures have been treated as expected since 18204 in
7416 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
7419 Changes in version 0.3.5.3-alpha - 2018-10-17
7420 Tor 0.3.5.3-alpha fixes several bugs, mostly from previous 0.3.5.x
7421 versions. One important fix for relays addresses a problem with rate-
7422 limiting code from back in 0.3.4.x: If the fix works out, we'll be
7423 backporting it soon. This release is still an alpha, but we hope it's
7424 getting closer and closer to stability.
7426 o Major features (onion services):
7427 - Version 3 onion services can now use the per-service
7428 HiddenServiceExportCircuitID option to differentiate client
7429 circuits. It communicates with the service by using the HAProxy
7430 protocol to assign virtual IP addresses to inbound client
7431 circuits. Closes ticket 4700. Patch by Mahrud Sayrafi.
7433 o Major bugfixes (compilation):
7434 - Fix compilation on ARM (and other less-used CPUs) when compiling
7435 with OpenSSL before 1.1. Fixes bug 27781; bugfix on 0.3.4.1-alpha.
7437 o Major bugfixes (initialization, crash):
7438 - Fix an assertion crash that would stop Tor from starting up if it
7439 tried to activate a periodic event too early. Fixes bug 27861;
7440 bugfix on 0.3.5.1-alpha.
7442 o Major bugfixes (mainloop, bootstrap):
7443 - Make sure Tor bootstraps and works properly if only the
7444 ControlPort is set. Prior to this fix, Tor would only bootstrap
7445 when a client port was set (Socks, Trans, NATD, DNS or HTTPTunnel
7446 port). Fixes bug 27849; bugfix on 0.3.4.1-alpha.
7448 o Major bugfixes (relay):
7449 - When our write bandwidth limit is exhausted, stop writing on the
7450 connection. Previously, we had a typo in the code that would make
7451 us stop reading instead, leading to relay connections being stuck
7452 indefinitely and consuming kernel RAM. Fixes bug 28089; bugfix
7455 o Minor features (continuous integration):
7456 - Use the Travis Homebrew addon to install packages on macOS during
7457 Travis CI. The package list is the same, but the Homebrew addon
7458 does not do a `brew update` by default. Implements ticket 27738.
7459 - Report what program produced the mysterious core file that we
7460 occasionally see on Travis CI during make distcheck. Closes
7463 o Minor features (geoip):
7464 - Update geoip and geoip6 to the October 9 2018 Maxmind GeoLite2
7465 Country database. Closes ticket 27991.
7467 o Minor bugfixes (code safety):
7468 - Rewrite our assertion macros so that they no longer suppress the
7469 compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
7472 o Minor bugfixes (compilation):
7473 - Compile the ed25519-donna code with a correct declaration of
7474 crypto_strongest_rand(). Previously, we built it with one type,
7475 but linked it against another in the unit tests, which caused
7476 compilation failures with LTO enabled. This could have caused
7477 other undefined behavior in the tests. Fixes bug 27728; bugfix
7480 o Minor bugfixes (compilation, netbsd):
7481 - Add a missing include back into procmon.c. Fixes bug 27990; bugfix
7484 o Minor bugfixes (continuous integration, appveyor):
7485 - Install only the necessary mingw packages during our appveyor
7486 builds. This change makes the build a little faster, and prevents
7487 a conflict with a preinstalled mingw openssl that appveyor now
7488 ships. Fixes bugs 27765 and 27943; bugfix on 0.3.4.2-alpha.
7490 o Minor bugfixes (directory permissions):
7491 - When a user requests a group-readable DataDirectory, give it to
7492 them. Previously, when the DataDirectory and the CacheDirectory
7493 were the same, the default setting (0) for
7494 CacheDirectoryGroupReadable would override the setting for
7495 DataDirectoryGroupReadable. Fixes bug 26913; bugfix
7498 o Minor bugfixes (memory leaks):
7499 - Fix a small memory leak when calling Tor with --dump-config. Fixes
7500 bug 27893; bugfix on 0.3.2.1-alpha.
7502 o Minor bugfixes (networking):
7503 - In retry_listeners_ports(), make sure that we're removing a member
7504 of old_conns smartlist at most once. Fixes bug 27808; bugfix
7506 - Refrain from attempting socket rebinding when old and new
7507 listeners are in different address families. Fixes bug 27928;
7508 bugfix on 0.3.5.1-alpha.
7510 o Minor bugfixes (onion service v3):
7511 - Stop dumping a stack trace when trying to connect to an intro
7512 point without having a descriptor for it. Fixes bug 27774; bugfix
7514 - Don't warn so loudly when Tor is unable to decode an onion
7515 descriptor. This can now happen as a normal use case if a client
7516 gets a descriptor with client authorization but the client is not
7517 authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
7518 - When selecting a v3 rendezvous point, don't only look at the
7519 protover, but also check whether the curve25519 onion key is
7520 present. This way we avoid picking a relay that supports the v3
7521 rendezvous but for which we don't have the microdescriptor. Fixes
7522 bug 27797; bugfix on 0.3.2.1-alpha.
7524 o Minor bugfixes (protover):
7525 - Reject protocol names containing bytes other than alphanumeric
7526 characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
7529 o Minor bugfixes (testing):
7530 - Make the hs_service tests use the same time source when creating
7531 the introduction point and when testing it. Now tests work better
7532 on very slow systems like ARM or Travis. Fixes bug 27810; bugfix
7534 - In test_rebind.py, check if the Python version is in the supported
7535 range. Fixes bug 27675; bugfix on 0.3.5.1-alpha.
7537 o Code simplification and refactoring:
7538 - Divide more large Tor source files -- especially ones that span
7539 multiple areas of functionality -- into smaller parts, including
7540 onion.c and main.c. Closes ticket 26747.
7541 - Divide the "routerparse.c" module into separate modules for each
7542 group of parsed objects. Closes ticket 27924.
7543 - Move protover_rust.c to the same place protover.c was moved to.
7544 Closes ticket 27814.
7545 - Split directory.c into separate pieces for client, server, and
7546 common functionality. Closes ticket 26744.
7547 - Split the non-statistics-related parts from the rephist.c and
7548 geoip.c modules. Closes ticket 27892.
7549 - Split the router.c file into relay-only and shared components, to
7550 help with future modularization. Closes ticket 27864.
7553 - In the tor-resolve(1) manpage, fix the reference to socks-
7554 extensions.txt by adding a web URL. Resolves ticket 27853.
7555 - Mention that we require Python to be 2.7 or newer for some
7556 integration tests that we ship with Tor. Resolves ticket 27677.
7559 Changes in version 0.3.5.2-alpha - 2018-09-21
7560 Tor 0.3.5.2-alpha fixes several bugs in 0.3.5.1-alpha, including one
7561 that made Tor think it had run out of sockets. Anybody running a relay
7562 or an onion service on 0.3.5.1-alpha should upgrade.
7564 o Major bugfixes (relay bandwidth statistics):
7565 - When we close relayed circuits, report the data in the circuit
7566 queues as being written in our relay bandwidth stats. This
7567 mitigates guard discovery and other attacks that close circuits
7568 for the explicit purpose of noticing this discrepancy in
7569 statistics. Fixes bug 23512; bugfix on 0.0.8pre3.
7571 o Major bugfixes (socket accounting):
7572 - In our socket accounting code, count a socket as closed even when
7573 it is closed indirectly by the TLS layer. Previously, we would
7574 count these sockets as still in use, and incorrectly believe that
7575 we had run out of sockets. Fixes bug 27795; bugfix
7578 o Minor bugfixes (32-bit OSX and iOS, timing):
7579 - Fix an integer overflow bug in our optimized 32-bit millisecond-
7580 difference algorithm for 32-bit Apple platforms. Previously, it
7581 would overflow when calculating the difference between two times
7582 more than 47 days apart. Fixes part of bug 27139; bugfix
7584 - Improve the precision of our 32-bit millisecond difference
7585 algorithm for 32-bit Apple platforms. Fixes part of bug 27139;
7586 bugfix on 0.3.4.1-alpha.
7587 - Relax the tolerance on the mainloop/update_time_jumps test when
7588 running on 32-bit Apple platforms. Fixes part of bug 27139; bugfix
7591 o Minor bugfixes (onion service v3):
7592 - Close all SOCKS request (for the same .onion) if the newly fetched
7593 descriptor is unusable. Before that, we would close only the first
7594 one leaving the other hanging and let to time out by themselves.
7595 Fixes bug 27410; bugfix on 0.3.2.1-alpha.
7597 o Minor bugfixes (memory leak):
7598 - Fix an unlikely memory leak when trying to read a private key from
7599 a ridiculously large file. Fixes bug 27764; bugfix on
7600 0.3.5.1-alpha. This is CID 1439488.
7602 o Minor bugfixes (NSS):
7603 - Correctly detect failure to open a dummy TCP socket when stealing
7604 ownership of an fd from the NSS layer. Fixes bug 27782; bugfix
7607 o Minor bugfixes (rust):
7608 - protover_all_supported() would attempt to allocate up to 16GB on
7609 some inputs, leading to a potential memory DoS. Fixes bug 27206;
7610 bugfix on 0.3.3.5-rc.
7612 o Minor bugfixes (testing):
7613 - Revise the "conditionvar_timeout" test so that it succeeds even on
7614 heavily loaded systems where the test threads are not scheduled
7615 within 200 msec. Fixes bug 27073; bugfix on 0.2.6.3-alpha.
7617 o Code simplification and refactoring:
7618 - Divide the routerlist.c and dirserv.c modules into smaller parts.
7619 Closes ticket 27799.
7622 Changes in version 0.3.5.1-alpha - 2018-09-18
7623 Tor 0.3.5.1-alpha is the first release of the 0.3.5.x series. It adds
7624 client authorization for modern (v3) onion services, improves
7625 bootstrap reporting, begins reorganizing Tor's codebase, adds optional
7626 support for NSS in place of OpenSSL, and much more.
7628 o Major features (onion services, UI change):
7629 - For a newly created onion service, the default version is now 3.
7630 Tor still supports existing version 2 services, but the operator
7631 now needs to set "HiddenServiceVersion 2" in order to create a new
7632 version 2 service. For existing services, Tor now learns the
7633 version by reading the key file. Closes ticket 27215.
7635 o Major features (relay, UI change):
7636 - Relays no longer run as exits by default. If the "ExitRelay"
7637 option is auto (or unset), and no exit policy is specified with
7638 ExitPolicy or ReducedExitPolicy, we now treat ExitRelay as 0.
7639 Previously in this case, we allowed exit traffic and logged a
7640 warning message. Closes ticket 21530. Patch by Neel Chauhan.
7641 - Tor now validates that the ContactInfo config option is valid UTF-
7642 8 when parsing torrc. Closes ticket 27428.
7644 o Major features (bootstrap):
7645 - Don't report directory progress until after a connection to a
7646 relay or bridge has succeeded. Previously, we'd report 80%
7647 progress based on cached directory information when we couldn't
7648 even connect to the network. Closes ticket 27169.
7650 o Major features (new code layout):
7651 - Nearly all of Tor's source code has been moved around into more
7652 logical places. The "common" directory is now divided into a set
7653 of libraries in "lib", and files in the "or" directory have been
7654 split into "core" (logic absolutely needed for onion routing),
7655 "feature" (independent modules in Tor), and "app" (to configure
7656 and invoke the rest of Tor). See doc/HACKING/CodeStructure.md for
7657 more information. Closes ticket 26481.
7659 This refactoring is not complete: although the libraries have been
7660 refactored to be acyclic, the main body of Tor is still too
7661 interconnected. We will attempt to improve this in the future.
7663 o Major features (onion services v3):
7664 - Implement onion service client authorization at the descriptor
7665 level: only authorized clients can decrypt a service's descriptor
7666 to find out how to contact it. A new torrc option was added to
7667 control this client side: ClientOnionAuthDir <path>. On the
7668 service side, if the "authorized_clients/" directory exists in the
7669 onion service directory path, client configurations are read from
7670 the files within. See the manpage for more details. Closes ticket
7671 27547. Patch done by Suphanat Chunhapanya (haxxpop).
7672 - Improve revision counter generation in next-gen onion services.
7673 Onion services can now scale by hosting multiple instances on
7674 different hosts without synchronization between them, which was
7675 previously impossible because descriptors would get rejected by
7676 HSDirs. Addresses ticket 25552.
7678 o Major features (portability, cryptography, experimental, TLS):
7679 - Tor now has the option to compile with the NSS library instead of
7680 OpenSSL. This feature is experimental, and we expect that bugs may
7681 remain. It is mainly intended for environments where Tor's
7682 performance is not CPU-bound, and where NSS is already known to be
7683 installed. To try it out, configure Tor with the --enable-nss
7684 flag. Closes tickets 26631, 26815, and 26816.
7686 If you are experimenting with this option and using an old cached
7687 consensus, Tor may fail to start. To solve this, delete your
7688 "cached-consensus" and "cached-microdesc-consensus" files,
7689 (if present), and restart Tor.
7691 o Major bugfixes (directory authority):
7692 - Actually check that the address we get from DirAuthority
7693 configuration line is valid IPv4. Explicitly disallow DirAuthority
7694 address to be a DNS hostname. Fixes bug 26488; bugfix
7697 o Major bugfixes (restart-in-process):
7698 - Fix a use-after-free error that could be caused by passing Tor an
7699 impossible set of options that would fail during options_act().
7700 Fixes bug 27708; bugfix on 0.3.3.1-alpha.
7702 o Minor features (admin tools):
7703 - Add a new --key-expiration option to print the expiration date of
7704 the signing cert in an ed25519_signing_cert file. Resolves
7707 o Minor features (build):
7708 - If you pass the "--enable-pic" option to configure, Tor will try
7709 to tell the compiler to build position-independent code suitable
7710 to link into a dynamic library. (The default remains -fPIE, for
7711 code suitable for a relocatable executable.) Closes ticket 23846.
7713 o Minor features (code correctness, testing):
7714 - Tor's build process now includes a "check-includes" make target to
7715 verify that no module of Tor relies on any headers from a higher-
7716 level module. We hope to use this feature over time to help
7717 refactor our codebase. Closes ticket 26447.
7719 o Minor features (code layout):
7720 - We have a new "lowest-level" error-handling API for use by code
7721 invoked from within the logging module. With this interface, the
7722 logging code is no longer at risk of calling into itself if a
7723 failure occurs while it is trying to log something. Closes
7726 o Minor features (compilation):
7727 - Tor's configure script now supports a --with-malloc= option to
7728 select your malloc implementation. Supported options are
7729 "tcmalloc", "jemalloc", "openbsd" (deprecated), and "system" (the
7730 default). Addresses part of ticket 20424. Based on a patch from
7733 o Minor features (config):
7734 - The "auto" keyword in torrc is now case-insensitive. Closes
7737 o Minor features (continuous integration):
7738 - Don't do a distcheck with --disable-module-dirauth in Travis.
7739 Implements ticket 27252.
7740 - Install libcap-dev and libseccomp2-dev so these optional
7741 dependencies get tested on Travis CI. Closes ticket 26560.
7742 - Only run one online rust build in Travis, to reduce network
7743 errors. Skip offline rust builds on Travis for Linux gcc, because
7744 they're redundant. Implements ticket 27252.
7745 - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
7746 duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
7747 Linux with default settings, because all the non-default builds
7748 use gcc on Linux. Implements ticket 27252.
7750 o Minor features (controller):
7751 - Emit CIRC_BW events as soon as we detect that we processed an
7752 invalid or otherwise dropped cell on a circuit. This allows
7753 vanguards and other controllers to react more quickly to dropped
7754 cells. Closes ticket 27678.
7755 - For purposes of CIRC_BW-based dropped cell detection, track half-
7756 closed stream ids, and allow their ENDs, SENDMEs, DATA and path
7757 bias check cells to arrive without counting it as dropped until
7758 either the END arrives, or the windows are empty. Closes
7760 - Implement a 'GETINFO md/all' controller command to enable getting
7761 all known microdescriptors. Closes ticket 8323.
7762 - The GETINFO command now support an "uptime" argument, to return
7763 Tor's uptime in seconds. Closes ticket 25132.
7765 o Minor features (denial-of-service avoidance):
7766 - Make our OOM handler aware of the DNS cache so that it doesn't
7767 fill up the memory. This check is important for our DoS mitigation
7768 subsystem. Closes ticket 18642. Patch by Neel Chauhan.
7770 o Minor features (development):
7771 - Tor's makefile now supports running the "clippy" Rust style tool
7772 on our Rust code. Closes ticket 22156.
7774 o Minor features (directory authority):
7775 - There is no longer an artificial upper limit on the length of
7776 bandwidth lines. Closes ticket 26223.
7777 - When a bandwidth file is used to obtain the bandwidth measurements,
7778 include this bandwidth file headers in the votes. Closes
7780 - Improved support for networks with only a single authority or a
7781 single fallback directory. Patch from Gabriel Somlo. Closes
7784 o Minor features (embedding API):
7785 - The Tor controller API now supports a function to launch Tor with
7786 a preconstructed owning controller FD, so that embedding
7787 applications don't need to manage controller ports and
7788 authentication. Closes ticket 24204.
7789 - The Tor controller API now has a function that returns the name
7790 and version of the backend implementing the API. Closes
7793 o Minor features (geoip):
7794 - Update geoip and geoip6 to the September 6 2018 Maxmind GeoLite2
7795 Country database. Closes ticket 27631.
7797 o Minor features (memory management):
7798 - Get Libevent to use the same memory allocator as Tor, by calling
7799 event_set_mem_functions() during initialization. Resolves
7802 o Minor features (memory usage):
7803 - When not using them, store legacy TAP public onion keys in DER-
7804 encoded format, rather than as expanded public keys. This should
7805 save several megabytes on typical clients. Closes ticket 27246.
7807 o Minor features (OpenSSL):
7808 - When possible, use RFC5869 HKDF implementation from OpenSSL rather
7809 than our own. Resolves ticket 19979.
7811 o Minor features (Rust, code quality):
7812 - Improve rust code quality in the rust protover implementation by
7813 making it more idiomatic. Includes changing an internal API to
7814 take &str instead of &String. Closes ticket 26492.
7816 o Minor features (testing):
7817 - Add scripts/test/chutney-git-bisect.sh, for bisecting using
7818 chutney. Implements ticket 27211.
7820 o Minor features (tor-resolve):
7821 - The tor-resolve utility can now be used with IPv6 SOCKS proxies.
7822 Side-effect of the refactoring for ticket 26526.
7824 o Minor features (UI):
7825 - Log each included configuration file or directory as we read it,
7826 to provide more visibility about where Tor is reading from. Patch
7827 from Unto Sten; closes ticket 27186.
7828 - Lower log level of "Scheduler type KIST has been enabled" to INFO.
7829 Closes ticket 26703.
7831 o Minor bugfixes (bootstrap):
7832 - Try harder to get descriptors in non-exit test networks, by using
7833 the mid weight for the third hop when there are no exits. Fixes
7834 bug 27237; bugfix on 0.2.6.2-alpha.
7836 o Minor bugfixes (C correctness):
7837 - Avoid casting smartlist index to int implicitly, as it may trigger
7838 a warning (-Wshorten-64-to-32). Fixes bug 26282; bugfix on
7839 0.2.3.13-alpha, 0.2.7.1-alpha and 0.2.1.1-alpha.
7840 - Use time_t for all values in
7841 predicted_ports_prediction_time_remaining(). Rework the code that
7842 computes difference between durations/timestamps. Fixes bug 27165;
7843 bugfix on 0.3.1.1-alpha.
7845 o Minor bugfixes (client, memory usage):
7846 - When not running as a directory cache, there is no need to store
7847 the text of the current consensus networkstatus in RAM.
7848 Previously, however, clients would store it anyway, at a cost of
7849 over 5 MB. Now, they do not. Fixes bug 27247; bugfix
7852 o Minor bugfixes (client, reachableaddresses):
7853 - Instead of adding a "reject *:*" line to ReachableAddresses when
7854 loading the configuration, add one to the policy after parsing it
7855 in parse_reachable_addresses(). This prevents extra "reject *.*"
7856 lines from accumulating on reloads. Fixes bug 20874; bugfix on
7857 0.1.1.5-alpha. Patch by Neel Chauhan.
7859 o Minor bugfixes (code quality):
7860 - Rename sandbox_getaddrinfo() and other functions to no longer
7861 misleadingly suggest that they are sandbox-only. Fixes bug 26525;
7862 bugfix on 0.2.7.1-alpha.
7864 o Minor bugfixes (configuration, Onion Services):
7865 - In rend_service_parse_port_config(), disallow any input to remain
7866 after address-port pair was parsed. This will catch address and
7867 port being whitespace-separated by mistake of the user. Fixes bug
7868 27044; bugfix on 0.2.9.10.
7870 o Minor bugfixes (continuous integration):
7871 - Stop reinstalling identical packages in our Windows CI. Fixes bug
7872 27464; bugfix on 0.3.4.1-alpha.
7874 o Minor bugfixes (controller):
7875 - Consider all routerinfo errors other than "not a server" to be
7876 transient for the purpose of "GETINFO exit-policy/*" controller
7877 request. Print stacktrace in the unlikely case of failing to
7878 recompute routerinfo digest. Fixes bug 27034; bugfix
7881 o Minor bugfixes (directory connection shutdown):
7882 - Avoid a double-close when shutting down a stalled directory
7883 connection. Fixes bug 26896; bugfix on 0.3.4.1-alpha.
7885 o Minor bugfixes (HTTP tunnel):
7886 - Fix a bug warning when closing an HTTP tunnel connection due to an
7887 HTTP request we couldn't handle. Fixes bug 26470; bugfix
7890 o Minor bugfixes (ipv6):
7891 - In addrs_in_same_network_family(), we choose the subnet size based
7892 on the IP version (IPv4 or IPv6). Previously, we chose a fixed
7893 subnet size of /16 for both IPv4 and IPv6 addresses. Fixes bug
7894 15518; bugfix on 0.2.3.1-alpha. Patch by Neel Chauhan.
7896 o Minor bugfixes (logging):
7897 - As a precaution, do an early return from log_addr_has_changed() if
7898 Tor is running as client. Also, log a stack trace for debugging as
7899 this function should only be called when Tor runs as server. Fixes
7900 bug 26892; bugfix on 0.1.1.9-alpha.
7901 - Refrain from mentioning bug 21018 in the logs, as it is already
7902 fixed. Fixes bug 25477; bugfix on 0.2.9.8.
7904 o Minor bugfixes (logging, documentation):
7905 - When SafeLogging is enabled, scrub IP address in
7906 channel_tls_process_netinfo_cell(). Also, add a note to manpage
7907 that scrubbing is not guaranteed on loglevels below Notice. Fixes
7908 bug 26882; bugfix on 0.2.4.10-alpha.
7910 o Minor bugfixes (netflow padding):
7911 - Ensure circuitmux queues are empty before scheduling or sending
7912 padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
7914 o Minor bugfixes (onion service v2):
7915 - Log at level "info", not "warning", in the case that we do not
7916 have a consensus when a .onion request comes in. This can happen
7917 normally while bootstrapping. Fixes bug 27040; bugfix
7920 o Minor bugfixes (onion service v3):
7921 - When the onion service directory can't be created or has the wrong
7922 permissions, do not log a stack trace. Fixes bug 27335; bugfix
7925 o Minor bugfixes (OS compatibility):
7926 - Properly handle configuration changes that move a listener to/from
7927 wildcard IP address. If the first attempt to bind a socket fails,
7928 close the old listener and try binding the socket again. Fixes bug
7929 17873; bugfix on 0.0.8pre-1.
7931 o Minor bugfixes (performance)::
7932 - Rework node_is_a_configured_bridge() to no longer call
7933 node_get_all_orports(), which was performing too many memory
7934 allocations. Fixes bug 27224; bugfix on 0.2.3.9.
7936 o Minor bugfixes (relay statistics):
7937 - Update relay descriptor on bandwidth changes only when the uptime
7938 is smaller than 24h, in order to reduce the efficiency of guard
7939 discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
7941 o Minor bugfixes (relays):
7942 - Consider the fact that we'll be making direct connections to our
7943 entry and guard nodes when computing the fraction of nodes that
7944 have their descriptors. Also, if we are using bridges and there is
7945 at least one bridge with a full descriptor, treat the fraction of
7946 guards available as 100%. Fixes bug 25886; bugfix on 0.2.4.10-alpha.
7947 Patch by Neel Chauhan.
7948 - Update the message logged on relays when DirCache is disabled.
7949 Since 0.3.3.5-rc, authorities require DirCache (V2Dir) for the
7950 Guard flag. Fixes bug 24312; bugfix on 0.3.3.5-rc.
7952 o Minor bugfixes (rust, protover):
7953 - Compute protover votes correctly in the rust version of the
7954 protover code. Previously, the protover rewrite in 24031 allowed
7955 repeated votes from the same voter for the same protocol version
7956 to be counted multiple times in protover_compute_vote(). Fixes bug
7957 27649; bugfix on 0.3.3.5-rc.
7958 - Reject protover names that contain invalid characters. Fixes bug
7959 27687; bugfix on 0.3.3.1-alpha.
7961 o Minor bugfixes (testing):
7962 - Fix two unit tests to work when HOME environment variable is not
7963 set. Fixes bug 27096; bugfix on 0.2.8.1-alpha.
7964 - If a unit test running in a subprocess exits abnormally or with a
7965 nonzero status code, treat the test as having failed, even if the
7966 test reported success. Without this fix, memory leaks don't cause
7967 the tests to fail, even with LeakSanitizer. Fixes bug 27658;
7968 bugfix on 0.2.2.4-alpha.
7969 - When logging a version mismatch in our openssl_version tests,
7970 report the actual offending version strings. Fixes bug 26152;
7971 bugfix on 0.2.9.1-alpha.
7972 - Fix forking tests on Windows when there is a space somewhere in
7973 the path. Fixes bug 26437; bugfix on 0.2.2.4-alpha.
7975 o Code simplification and refactoring:
7976 - 'updateFallbackDirs.py' now ignores the blacklist file, as it's not
7977 longer needed. Closes ticket 26502.
7978 - Include paths to header files within Tor are now qualified by
7979 directory within the top-level src directory.
7980 - Many structures have been removed from the centralized "or.h"
7981 header, and moved into their own headers. This will allow us to
7982 reduce the number of places in the code that rely on each
7983 structure's contents and layout. Closes ticket 26383.
7984 - Remove ATTR_NONNULL macro from codebase. Resolves ticket 26527.
7985 - Remove GetAdaptersAddresses_fn_t. The code that used it was
7986 removed as part of the 26481 refactor. Closes ticket 27467.
7987 - Rework Tor SOCKS server code to use Trunnel and benefit from
7988 autogenerated functions for parsing and generating SOCKS wire
7989 format. New implementation is cleaner, more maintainable and
7990 should be less prone to heartbleed-style vulnerabilities.
7991 Implements a significant fraction of ticket 3569.
7992 - Split sampled_guards_update_from_consensus() and
7993 select_entry_guard_for_circuit() into subfunctions. In
7994 entry_guards_update_primary() unite three smartlist enumerations
7995 into one and move smartlist comparison code out of the function.
7996 Closes ticket 21349.
7997 - Tor now assumes that you have standards-conformant stdint.h and
7998 inttypes.h headers when compiling. Closes ticket 26626.
7999 - Unify our bloom filter logic. Previously we had two copies of this
8000 code: one for routerlist filtering, and one for address set
8001 calculations. Closes ticket 26510.
8002 - Use the simpler strcmpstart() helper in
8003 rend_parse_v2_service_descriptor instead of strncmp(). Closes
8005 - Utility functions that can perform a DNS lookup are now wholly
8006 separated from those that can't, in separate headers and C
8007 modules. Closes ticket 26526.
8010 - Copy paragraph and URL to Tor's code of conduct document from
8011 CONTRIBUTING to new CODE_OF_CONDUCT file. Resolves ticket 26638.
8012 - Remove old instructions from INSTALL document. Closes ticket 26588.
8013 - Warn users that they should not include MyFamily line(s) in their
8014 torrc when running Tor bridge. Closes ticket 26908.
8017 - Tor no longer supports building with the dmalloc library. For
8018 debugging memory issues, we suggest using gperftools or msan
8019 instead. Closes ticket 26426.
8020 - Tor no longer attempts to run on Windows environments without the
8021 GetAdaptersAddresses() function. This function has existed since
8022 Windows XP, which is itself already older than we support.
8023 - Remove Tor2web functionality for version 2 onion services. The
8024 Tor2webMode and Tor2webRendezvousPoints options are now obsolete.
8025 (This feature was never shipped in vanilla Tor and it was only
8026 possible to use this feature by building the support at compile
8027 time. Tor2webMode is not implemented for version 3 onion services.)
8028 Closes ticket 26367.
8031 Changes in version 0.2.9.17 - 2018-09-10
8032 Tor 0.2.9.17 backports numerous bugfixes from later versions of Tor.
8034 o Minor features (compatibility, backport from 0.3.4.8):
8035 - Tell OpenSSL to maintain backward compatibility with previous
8036 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
8037 ciphers are disabled by default. Closes ticket 27344.
8039 o Minor features (continuous integration, backport from 0.3.4.7-rc):
8040 - Enable macOS builds in our Travis CI configuration. Closes
8042 - Install libcap-dev and libseccomp2-dev so these optional
8043 dependencies get tested on Travis CI. Closes ticket 26560.
8044 - Run asciidoc during Travis CI. Implements ticket 27087.
8045 - Use ccache in our Travis CI configuration. Closes ticket 26952.
8047 o Minor features (geoip):
8048 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
8049 Country database. Closes ticket 27089.
8051 o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
8052 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
8053 tell the compiler not to include the system malloc implementation.
8054 Fixes bug 20424; bugfix on 0.2.0.20-rc.
8056 o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
8057 - Silence a spurious compiler warning on the GetAdaptersAddresses
8058 function pointer cast. This issue is already fixed by 26481 in
8059 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
8060 bugfix on 0.2.3.11-alpha.
8061 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
8062 supported, and always fails. Some compilers warn about the
8063 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
8066 o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
8067 - Don't link or search for pthreads when building for Windows, even
8068 if we are using build environment (like mingw) that provides a
8069 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
8071 o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
8072 - Skip a pair of unreliable key generation tests on Windows, until
8073 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
8074 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
8076 o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
8077 - Pass the module flags to distcheck configure, and log the flags
8078 before running configure. (Backported to 0.2.9 and later as a
8079 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
8081 o Minor bugfixes (continuous integration, backport from 0.3.4.8):
8082 - When a Travis build fails, and showing a log fails, keep trying to
8083 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
8084 - When we use echo in Travis, don't pass a --flag as the first
8085 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
8087 o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
8088 - When voting for recommended versions, make sure that all of the
8089 versions are well-formed and parsable. Fixes bug 26485; bugfix
8092 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
8093 - Fix a bug in out sandboxing rules for the openat() syscall.
8094 Previously, no openat() call would be permitted, which would break
8095 filesystem operations on recent glibc versions. Fixes bug 25440;
8096 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
8098 o Minor bugfixes (onion services, backport from 0.3.4.8):
8099 - Silence a spurious compiler warning in
8100 rend_client_send_introduction(). Fixes bug 27463; bugfix
8103 o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
8104 - Log a protocol warning when single onion services or Tor2web clients
8105 fail to authenticate direct connections to relays.
8106 Fixes bug 26924; bugfix on 0.2.9.1-alpha.
8108 o Minor bugfixes (testing, backport from 0.3.4.6-rc):
8109 - Disable core dumps in test_bt.sh, to avoid failures in "make
8110 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
8112 o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
8113 - Before running make test-network-all, delete old logs and test
8114 result files, to avoid spurious failures. Fixes bug 27295; bugfix
8117 o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
8118 - Our "tortls/cert_matches_key" unit test no longer relies on
8119 OpenSSL internals. Previously, it relied on unsupported OpenSSL
8120 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
8121 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
8123 o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
8124 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
8125 27185; bugfix on 0.2.2.2-alpha.
8128 Changes in version 0.3.2.12 - 2018-09-10
8129 Tor 0.3.2.12 backport numerous fixes from later versions of Tor.
8131 o Minor features (compatibility, backport from 0.3.4.8):
8132 - Tell OpenSSL to maintain backward compatibility with previous
8133 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
8134 ciphers are disabled by default. Closes ticket 27344.
8136 o Minor features (continuous integration, backport from 0.3.4.7-rc):
8137 - Enable macOS builds in our Travis CI configuration. Closes
8139 - Install libcap-dev and libseccomp2-dev so these optional
8140 dependencies get tested on Travis CI. Closes ticket 26560.
8141 - Run asciidoc during Travis CI. Implements ticket 27087.
8142 - Use ccache in our Travis CI configuration. Closes ticket 26952.
8144 o Minor features (continuous integration, rust, backport from 0.3.4.7-rc):
8145 - Use cargo cache in our Travis CI configuration. Closes
8148 o Minor features (controller, backport from 0.3.4.6-rc):
8149 - The control port now exposes the list of HTTPTunnelPorts and
8150 ExtOrPorts via GETINFO net/listeners/httptunnel and
8151 net/listeners/extor respectively. Closes ticket 26647.
8153 o Minor features (directory authorities, backport from 0.3.4.7-rc):
8154 - Authorities no longer vote to make the subprotocol version
8155 "LinkAuth=1" a requirement: it is unsupportable with NSS, and
8156 hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
8158 o Minor features (geoip):
8159 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
8160 Country database. Closes ticket 27089.
8162 o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
8163 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
8164 tell the compiler not to include the system malloc implementation.
8165 Fixes bug 20424; bugfix on 0.2.0.20-rc.
8166 - Don't try to use a pragma to temporarily disable the
8167 -Wunused-const-variable warning if the compiler doesn't support
8168 it. Fixes bug 26785; bugfix on 0.3.2.11.
8170 o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
8171 - Silence a spurious compiler warning on the GetAdaptersAddresses
8172 function pointer cast. This issue is already fixed by 26481 in
8173 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
8174 bugfix on 0.2.3.11-alpha.
8175 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
8176 supported, and always fails. Some compilers warn about the
8177 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
8180 o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
8181 - Don't link or search for pthreads when building for Windows, even
8182 if we are using build environment (like mingw) that provides a
8183 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
8185 o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
8186 - Skip a pair of unreliable key generation tests on Windows, until
8187 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
8188 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
8190 o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
8191 - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
8192 - Pass the module flags to distcheck configure, and log the flags
8193 before running configure. (Backported to 0.2.9 and later as a
8194 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
8196 o Minor bugfixes (continuous integration, backport from 0.3.4.8):
8197 - When a Travis build fails, and showing a log fails, keep trying to
8198 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
8199 - When we use echo in Travis, don't pass a --flag as the first
8200 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
8202 o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
8203 - When voting for recommended versions, make sure that all of the
8204 versions are well-formed and parsable. Fixes bug 26485; bugfix
8207 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
8208 - Fix a bug in out sandboxing rules for the openat() syscall.
8209 Previously, no openat() call would be permitted, which would break
8210 filesystem operations on recent glibc versions. Fixes bug 25440;
8211 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
8213 o Minor bugfixes (logging, backport from 0.3.4.6-rc):
8214 - Improve the log message when connection initiators fail to
8215 authenticate direct connections to relays. Fixes bug 26927; bugfix
8218 o Minor bugfixes (onion services, backport from 0.3.4.7-rc):
8219 - Fix bug that causes services to not ever rotate their descriptors
8220 if they were getting SIGHUPed often. Fixes bug 26932; bugfix
8223 o Minor bugfixes (onion services, backport from 0.3.4.8):
8224 - Silence a spurious compiler warning in
8225 rend_client_send_introduction(). Fixes bug 27463; bugfix
8228 o Minor bugfixes (rust, backport from 0.3.4.7-rc):
8229 - Backport test_rust.sh from master. Fixes bug 26497; bugfix
8231 - Consistently use ../../.. as a fallback for $abs_top_srcdir in
8232 test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
8233 - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
8234 $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
8236 o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
8237 - Log a protocol warning when single onion services or Tor2web clients
8238 fail to authenticate direct connections to relays.
8239 Fixes bug 26924; bugfix on 0.2.9.1-alpha.
8241 o Minor bugfixes (testing, backport from 0.3.4.6-rc):
8242 - Disable core dumps in test_bt.sh, to avoid failures in "make
8243 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
8245 o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
8246 - When running make test-network-all, use the mixed+hs-v2 network.
8247 (A previous fix to chutney removed v3 onion services from the
8248 mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
8249 confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
8250 - Before running make test-network-all, delete old logs and test
8251 result files, to avoid spurious failures. Fixes bug 27295; bugfix
8254 o Minor bugfixes (testing, openssl compatibility):
8255 - Our "tortls/cert_matches_key" unit test no longer relies on OpenSSL
8256 internals. Previously, it relied on unsupported OpenSSL behavior in
8257 a way that caused it to crash with OpenSSL 1.0.2p. Fixes bug 27226;
8258 bugfix on 0.2.5.1-alpha.
8260 o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
8261 - Our "tortls/cert_matches_key" unit test no longer relies on
8262 OpenSSL internals. Previously, it relied on unsupported OpenSSL
8263 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
8264 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
8266 o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
8267 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
8268 27185; bugfix on 0.2.2.2-alpha.
8271 Changes in version 0.3.3.10 - 2018-09-10
8272 Tor 0.3.3.10 backports numerous fixes from later versions of Tor.
8274 o Minor features (bug workaround, backport from 0.3.4.7-rc):
8275 - Compile correctly on systems that provide the C11 stdatomic.h
8276 header, but where C11 atomic functions don't actually compile.
8277 Closes ticket 26779; workaround for Debian issue 903709.
8279 o Minor features (compatibility, backport from 0.3.4.8):
8280 - Tell OpenSSL to maintain backward compatibility with previous
8281 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
8282 ciphers are disabled by default. Closes ticket 27344.
8284 o Minor features (continuous integration, backport from 0.3.4.7-rc):
8285 - Backport Travis rust distcheck to 0.3.3. Closes ticket 24629.
8286 - Enable macOS builds in our Travis CI configuration. Closes
8288 - Install libcap-dev and libseccomp2-dev so these optional
8289 dependencies get tested on Travis CI. Closes ticket 26560.
8290 - Run asciidoc during Travis CI. Implements ticket 27087.
8291 - Use ccache in our Travis CI configuration. Closes ticket 26952.
8293 o Minor features (continuous integration, rust, backport from 0.3.4.7-rc):
8294 - Use cargo cache in our Travis CI configuration. Closes
8297 o Minor features (controller, backport from 0.3.4.6-rc):
8298 - The control port now exposes the list of HTTPTunnelPorts and
8299 ExtOrPorts via GETINFO net/listeners/httptunnel and
8300 net/listeners/extor respectively. Closes ticket 26647.
8302 o Minor features (directory authorities, backport from 0.3.4.7-rc):
8303 - Authorities no longer vote to make the subprotocol version
8304 "LinkAuth=1" a requirement: it is unsupportable with NSS, and
8305 hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
8307 o Minor features (geoip):
8308 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
8309 Country database. Closes ticket 27089.
8311 o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
8312 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
8313 tell the compiler not to include the system malloc implementation.
8314 Fixes bug 20424; bugfix on 0.2.0.20-rc.
8315 - Don't try to use a pragma to temporarily disable the
8316 -Wunused-const-variable warning if the compiler doesn't support
8317 it. Fixes bug 26785; bugfix on 0.3.2.11.
8319 o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
8320 - Silence a spurious compiler warning on the GetAdaptersAddresses
8321 function pointer cast. This issue is already fixed by 26481 in
8322 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
8323 bugfix on 0.2.3.11-alpha.
8324 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
8325 supported, and always fails. Some compilers warn about the
8326 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
8329 o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
8330 - Don't link or search for pthreads when building for Windows, even
8331 if we are using build environment (like mingw) that provides a
8332 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
8334 o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
8335 - Skip a pair of unreliable key generation tests on Windows, until
8336 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
8337 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
8339 o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
8340 - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
8341 - Pass the module flags to distcheck configure, and log the flags
8342 before running configure. (Backported to 0.2.9 and later as a
8343 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
8345 o Minor bugfixes (continuous integration, backport from 0.3.4.8):
8346 - When a Travis build fails, and showing a log fails, keep trying to
8347 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
8348 - When we use echo in Travis, don't pass a --flag as the first
8349 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
8351 o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
8352 - When voting for recommended versions, make sure that all of the
8353 versions are well-formed and parsable. Fixes bug 26485; bugfix
8356 o Minor bugfixes (in-process restart, backport from 0.3.4.7-rc):
8357 - Always call tor_free_all() when leaving tor_run_main(). When we
8358 did not, restarting tor in-process would cause an assertion
8359 failure. Fixes bug 26948; bugfix on 0.3.3.1-alpha.
8361 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
8362 - Fix a bug in our sandboxing rules for the openat() syscall.
8363 Previously, no openat() call would be permitted, which would break
8364 filesystem operations on recent glibc versions. Fixes bug 25440;
8365 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
8367 o Minor bugfixes (logging, backport from 0.3.4.6-rc):
8368 - Improve the log message when connection initiators fail to
8369 authenticate direct connections to relays. Fixes bug 26927; bugfix
8372 o Minor bugfixes (onion services, backport from 0.3.4.7-rc):
8373 - Fix bug that causes services to not ever rotate their descriptors
8374 if they were getting SIGHUPed often. Fixes bug 26932; bugfix
8377 o Minor bugfixes (onion services, backport from 0.3.4.8):
8378 - Silence a spurious compiler warning in
8379 rend_client_send_introduction(). Fixes bug 27463; bugfix
8382 o Minor bugfixes (portability, backport from 0.3.4.6-rc):
8383 - Work around two different bugs in the OS X 10.10 and later SDKs
8384 that would prevent us from successfully targeting earlier versions
8385 of OS X. Fixes bug 26876; bugfix on 0.3.3.1-alpha.
8387 o Minor bugfixes (portability, backport from 0.3.4.7-rc):
8388 - Fix compilation of the unit tests on GNU/Hurd, which does not
8389 define PATH_MAX. Fixes bug 26873; bugfix on 0.3.3.1-alpha. Patch
8392 o Minor bugfixes (rust, backport from 0.3.4.7-rc):
8393 - Backport test_rust.sh from master. Fixes bug 26497; bugfix
8395 - Consistently use ../../.. as a fallback for $abs_top_srcdir in
8396 test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
8397 - Protover parsing was accepting the presence of whitespace in
8398 version strings, which the C implementation would choke on, e.g.
8399 "Desc=1\t,2". Fixes bug 27177; bugfix on 0.3.3.5-rc.
8400 - Protover parsing was ignoring a 2nd hyphen and everything after
8401 it, accepting entries like "Link=1-5-foo". Fixes bug 27164; bugfix
8403 - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
8404 $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
8405 - cd to ${abs_top_builddir}/src/rust before running cargo in
8406 src/test/test_rust.sh. This makes the working directory consistent
8407 between builds and tests. Fixes bug 26497; bugfix on 0.3.3.2-alpha.
8409 o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
8410 - Log a protocol warning when single onion services or Tor2web clients
8411 fail to authenticate direct connections to relays.
8412 Fixes bug 26924; bugfix on 0.2.9.1-alpha.
8414 o Minor bugfixes (testing, backport from 0.3.4.6-rc):
8415 - Disable core dumps in test_bt.sh, to avoid failures in "make
8416 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
8418 o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
8419 - When running make test-network-all, use the mixed+hs-v2 network.
8420 (A previous fix to chutney removed v3 onion services from the
8421 mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
8422 confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
8423 - Before running make test-network-all, delete old logs and test
8424 result files, to avoid spurious failures. Fixes bug 27295; bugfix
8427 o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
8428 - Our "tortls/cert_matches_key" unit test no longer relies on
8429 OpenSSL internals. Previously, it relied on unsupported OpenSSL
8430 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
8431 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
8433 o Minor bugfixes (v3 onion services, backport from 0.3.4.6-rc):
8434 - Stop sending ed25519 link specifiers in v3 onion service introduce
8435 cells and descriptors, when the rendezvous or introduction point
8436 doesn't support ed25519 link authentication. Fixes bug 26627;
8437 bugfix on 0.3.2.4-alpha.
8439 o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
8440 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
8441 27185; bugfix on 0.2.2.2-alpha.
8444 Changes in version 0.3.4.8 - 2018-09-10
8445 Tor 0.3.4.8 is the first stable release in its series; it includes
8446 compilation and portability fixes.
8448 The Tor 0.3.4 series includes improvements for running Tor in
8449 low-power and embedded environments, which should help performance in
8450 general. We've begun work on better modularity, and included preliminary
8451 changes on the directory authority side to accommodate a new bandwidth
8452 measurement system. We've also integrated more continuous-integration
8453 systems into our development process, and made corresponding changes to
8454 Tor's testing infrastructure. Finally, we've continued to refine
8455 our anti-denial-of-service code.
8457 Below are the changes since 0.3.4.7-rc. For a complete list of changes
8458 since 0.3.3.9, see the ReleaseNotes file.
8460 o Minor features (compatibility):
8461 - Tell OpenSSL to maintain backward compatibility with previous
8462 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
8463 ciphers are disabled by default. Closes ticket 27344.
8465 o Minor features (continuous integration):
8466 - Log the compiler path and version during Appveyor builds.
8467 Implements ticket 27449.
8468 - Show config.log and test-suite.log after failed Appveyor builds.
8469 Also upload the zipped full logs as a build artifact. Implements
8472 o Minor bugfixes (compilation):
8473 - Silence a spurious compiler warning on the GetAdaptersAddresses
8474 function pointer cast. This issue is already fixed by 26481 in
8475 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
8476 bugfix on 0.2.3.11-alpha.
8477 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
8478 supported, and always fails. Some compilers warn about the
8479 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
8482 o Minor bugfixes (continuous integration):
8483 - Disable gcc hardening in Appveyor Windows 64-bit builds. As of
8484 August 29 2018, Appveyor images come with gcc 8.2.0 by default.
8485 Executables compiled for 64-bit Windows with this version of gcc
8486 crash when Tor's --enable-gcc-hardening flag is set. Fixes bug
8487 27460; bugfix on 0.3.4.1-alpha.
8488 - When a Travis build fails, and showing a log fails, keep trying to
8489 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
8490 - When we use echo in Travis, don't pass a --flag as the first
8491 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
8493 o Minor bugfixes (onion services):
8494 - Silence a spurious compiler warning in
8495 rend_client_send_introduction(). Fixes bug 27463; bugfix
8498 o Minor bugfixes (testing, chutney):
8499 - When running make test-network-all, use the mixed+hs-v2 network.
8500 (A previous fix to chutney removed v3 onion services from the
8501 mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
8502 confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
8503 - Before running make test-network-all, delete old logs and test
8504 result files, to avoid spurious failures. Fixes bug 27295; bugfix
8507 Changes in version 0.3.4.7-rc - 2018-08-24
8508 Tor 0.3.4.7-rc fixes several small compilation, portability, and
8509 correctness issues in previous versions of Tor. This version is a
8510 release candidate: if no serious bugs are found, we expect that the
8511 stable 0.3.4 release will be (almost) the same as this release.
8513 o Minor features (bug workaround):
8514 - Compile correctly on systems that provide the C11 stdatomic.h
8515 header, but where C11 atomic functions don't actually compile.
8516 Closes ticket 26779; workaround for Debian issue 903709.
8518 o Minor features (continuous integration):
8519 - Backport Travis rust distcheck to 0.3.3. Closes ticket 24629.
8520 - Enable macOS builds in our Travis CI configuration. Closes
8522 - Install libcap-dev and libseccomp2-dev so these optional
8523 dependencies get tested on Travis CI. Closes ticket 26560.
8524 - Only post Appveyor IRC notifications when the build fails.
8525 Implements ticket 27275.
8526 - Run asciidoc during Travis CI. Implements ticket 27087.
8527 - Use ccache in our Travis CI configuration. Closes ticket 26952.
8529 o Minor features (continuous integration, rust):
8530 - Use cargo cache in our Travis CI configuration. Closes
8533 o Minor features (directory authorities):
8534 - Authorities no longer vote to make the subprotocol version
8535 "LinkAuth=1" a requirement: it is unsupportable with NSS, and
8536 hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
8538 o Minor features (geoip):
8539 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
8540 Country database. Closes ticket 27089.
8542 o Minor bugfixes (compilation, windows):
8543 - Don't link or search for pthreads when building for Windows, even
8544 if we are using build environment (like mingw) that provides a
8545 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
8547 o Minor bugfixes (continuous integration):
8548 - Improve Appveyor CI IRC logging. Generate correct branches and
8549 URLs for pull requests and tags. Use unambiguous short commits.
8550 Fixes bug 26979; bugfix on master.
8551 - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
8552 - Pass the module flags to distcheck configure, and log the flags
8553 before running configure. (Backported to 0.2.9 and later as a
8554 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
8556 o Minor bugfixes (in-process restart):
8557 - Always call tor_free_all() when leaving tor_run_main(). When we
8558 did not, restarting tor in-process would cause an assertion
8559 failure. Fixes bug 26948; bugfix on 0.3.3.1-alpha.
8561 o Minor bugfixes (linux seccomp2 sandbox):
8562 - Fix a bug in out sandboxing rules for the openat() syscall.
8563 Previously, no openat() call would be permitted, which would break
8564 filesystem operations on recent glibc versions. Fixes bug 25440;
8565 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
8567 o Minor bugfixes (onion services):
8568 - Fix bug that causes services to not ever rotate their descriptors
8569 if they were getting SIGHUPed often. Fixes bug 26932; bugfix
8572 o Minor bugfixes (portability):
8573 - Fix compilation of the unit tests on GNU/Hurd, which does not
8574 define PATH_MAX. Fixes bug 26873; bugfix on 0.3.3.1-alpha. Patch
8577 o Minor bugfixes (rust):
8578 - Backport test_rust.sh from master. Fixes bug 26497; bugfix
8580 - Consistently use ../../.. as a fallback for $abs_top_srcdir in
8581 test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
8582 - Protover parsing was accepting the presence of whitespace in
8583 version strings, which the C implementation would choke on, e.g.
8584 "Desc=1\t,2". Fixes bug 27177; bugfix on 0.3.3.5-rc.
8585 - Protover parsing was ignoring a 2nd hyphen and everything after
8586 it, accepting entries like "Link=1-5-foo". Fixes bug 27164; bugfix
8588 - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
8589 $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
8590 - cd to ${abs_top_builddir}/src/rust before running cargo in
8591 src/test/test_rust.sh. This makes the working directory consistent
8592 between builds and tests. Fixes bug 26497; bugfix on 0.3.3.2-alpha.
8594 o Minor bugfixes (testing, bootstrap):
8595 - When calculating bootstrap progress, check exit policies and the
8596 exit flag. Previously, Tor would only check the exit flag, which
8597 caused race conditions in small and fast networks like chutney.
8598 Fixes bug 27236; bugfix on 0.2.6.3-alpha.
8600 o Minor bugfixes (testing, openssl compatibility):
8601 - Our "tortls/cert_matches_key" unit test no longer relies on
8602 OpenSSL internals. Previously, it relied on unsupported OpenSSL
8603 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
8604 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
8606 o Minor bugfixes (Windows, compilation):
8607 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
8608 27185; bugfix on 0.2.2.2-alpha.
8611 Changes in version 0.3.4.6-rc - 2018-08-06
8612 Tor 0.3.4.6-rc fixes several small compilation, portability, and
8613 correctness issues in previous versions of Tor. This version is a
8614 release candidate: if no serious bugs are found, we expect that the
8615 stable 0.3.4 release will be (almost) the same as this release.
8617 o Major bugfixes (event scheduler):
8618 - When we enable a periodic event, schedule it in the event loop
8619 rather than running it immediately. Previously, we would re-run
8620 periodic events immediately in the middle of (for example)
8621 changing our options, with unpredictable effects. Fixes bug 27003;
8622 bugfix on 0.3.4.1-alpha.
8624 o Minor features (compilation):
8625 - When building Tor, prefer to use Python 3 over Python 2, and more
8626 recent (contemplated) versions over older ones. Closes
8628 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
8629 tell the compiler not to include the system malloc implementation.
8630 Fixes bug 20424; bugfix on 0.2.0.20-rc.
8631 - Don't try to use a pragma to temporarily disable the
8632 -Wunused-const-variable warning if the compiler doesn't support
8633 it. Fixes bug 26785; bugfix on 0.3.2.11.
8635 o Minor bugfixes (continuous integration):
8636 - Skip a pair of unreliable key generation tests on Windows, until
8637 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
8638 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
8640 o Minor features (controller):
8641 - The control port now exposes the list of HTTPTunnelPorts and
8642 ExtOrPorts via GETINFO net/listeners/httptunnel and
8643 net/listeners/extor respectively. Closes ticket 26647.
8645 o Minor bugfixes (directory authority):
8646 - When voting for recommended versions, make sure that all of the
8647 versions are well-formed and parsable. Fixes bug 26485; bugfix
8650 o Minor features (geoip):
8651 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
8652 Country database. Closes ticket 26674.
8654 o Minor features (Rust, portability):
8655 - Rust cross-compilation is now supported. Closes ticket 25895.
8657 o Minor bugfixes (compilation):
8658 - Update build system so that tor builds again with --disable-unittests
8659 after recent refactoring. Fixes bug 26789; bugfix on 0.3.4.3-alpha.
8660 - Fix a compilation warning on some versions of GCC when building
8661 code that calls routerinfo_get_my_routerinfo() twice, assuming
8662 that the second call will succeed if the first one did. Fixes bug
8663 26269; bugfix on 0.2.8.2-alpha.
8665 o Minor bugfixes (controller):
8666 - Report the port correctly when a port is configured to bind to
8667 "auto". Fixes bug 26568; bugfix on 0.3.4.1-alpha.
8668 - Parse the "HSADDRESS=" parameter in HSPOST commands properly.
8669 Previously, it was misparsed and ignored. Fixes bug 26523; bugfix
8670 on 0.3.3.1-alpha. Patch by "akwizgran".
8672 o Minor bugfixes (correctness, flow control):
8673 - Upon receiving a stream-level SENDME cell, verify that our window
8674 has not grown too large. Fixes bug 26214; bugfix on svn
8677 o Minor bugfixes (memory, correctness):
8678 - Fix a number of small memory leaks identified by coverity. Fixes
8679 bug 26467; bugfix on numerous Tor versions.
8681 o Minor bugfixes (logging):
8682 - Improve the log message when connection initiators fail to
8683 authenticate direct connections to relays. Fixes bug 26927; bugfix
8686 o Minor bugfixes (portability):
8687 - Avoid a compilation error in test_bwmgt.c on Solaris 10. Fixes bug
8688 26994; bugfix on 0.3.4.1-alpha.
8689 - Work around two different bugs in the OS X 10.10 and later SDKs
8690 that would prevent us from successfully targeting earlier versions
8691 of OS X. Fixes bug 26876; bugfix on 0.3.3.1-alpha.
8693 o Minor bugfixes (single onion services, Tor2web):
8694 - Log a protocol warning when single onion services or Tor2web
8695 clients fail to authenticate direct connections to relays. Fixes
8696 bug 26924; bugfix on 0.2.9.1-alpha.
8698 o Minor bugfixes (testing):
8699 - Disable core dumps in test_bt.sh, to avoid failures in "make
8700 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
8702 o Minor bugfixes (testing, compatibility):
8703 - When running the ntor_ref.py and hs_ntor_ref.py tests, make sure
8704 only to pass strings (rather than "bytes" objects) to the Python
8705 subprocess module. Python 3 on Windows seems to require this.
8706 Fixes bug 26535; bugfix on 0.2.5.5-alpha (for ntor_ref.py) and
8707 0.3.1.1-alpha (for hs_ntor_ref.py).
8709 o Minor bugfixes (v3 onion services):
8710 - Stop sending ed25519 link specifiers in v3 onion service introduce
8711 cells and descriptors, when the rendezvous or introduction point
8712 doesn't support ed25519 link authentication. Fixes bug 26627;
8713 bugfix on 0.3.2.4-alpha.
8716 Changes in version 0.3.4.5-rc - 2018-07-13
8717 Tor 0.3.4.5-rc moves to a new bridge authority, meaning people running
8718 bridge relays should upgrade.
8720 o Directory authority changes:
8721 - The "Bifroest" bridge authority has been retired; the new bridge
8722 authority is "Serge", and it is operated by George from the
8723 TorBSD project. Closes ticket 26771.
8726 Changes in version 0.3.3.9 - 2018-07-13
8727 Tor 0.3.3.9 moves to a new bridge authority, meaning people running
8728 bridge relays should upgrade.
8730 o Directory authority changes:
8731 - The "Bifroest" bridge authority has been retired; the new bridge
8732 authority is "Serge", and it is operated by George from the
8733 TorBSD project. Closes ticket 26771.
8736 Changes in version 0.3.2.11 - 2018-07-13
8737 Tor 0.3.2.11 moves to a new bridge authority, meaning people running
8738 bridge relays should upgrade. We also take this opportunity to backport
8741 o Directory authority changes:
8742 - The "Bifroest" bridge authority has been retired; the new bridge
8743 authority is "Serge", and it is operated by George from the
8744 TorBSD project. Closes ticket 26771.
8746 o Directory authority changes (backport from 0.3.3.7):
8747 - Add an IPv6 address for the "dannenberg" directory authority.
8748 Closes ticket 26343.
8750 o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
8751 - When directory authorities read a zero-byte bandwidth file, they
8752 would previously log a warning with the contents of an
8753 uninitialised buffer. They now log a warning about the empty file
8754 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
8756 o Major bugfixes (onion service, backport from 0.3.4.1-alpha):
8757 - Correctly detect when onion services get disabled after HUP. Fixes
8758 bug 25761; bugfix on 0.3.2.1.
8760 o Minor features (sandbox, backport from 0.3.3.4-alpha):
8761 - Explicitly permit the poll() system call when the Linux
8762 seccomp2-based sandbox is enabled: apparently, some versions of
8763 libc use poll() when calling getpwnam(). Closes ticket 25313.
8765 o Minor feature (continuous integration, backport from 0.3.3.5-rc):
8766 - Update the Travis CI configuration to use the stable Rust channel,
8767 now that we have decided to require that. Closes ticket 25714.
8769 o Minor features (continuous integration, backport from 0.3.4.1-alpha):
8770 - Our .travis.yml configuration now includes support for testing the
8771 results of "make distcheck". (It's not uncommon for "make check"
8772 to pass but "make distcheck" to fail.) Closes ticket 25814.
8773 - Our Travis CI configuration now integrates with the Coveralls
8774 coverage analysis tool. Closes ticket 25818.
8776 o Minor features (relay, diagnostic, backport from 0.3.4.3-alpha):
8777 - Add several checks to detect whether Tor relays are uploading
8778 their descriptors without specifying why they regenerated them.
8779 Diagnostic for ticket 25686.
8781 o Minor features (compilation, backport from 0.3.4.4-rc):
8782 - When building Tor, prefer to use Python 3 over Python 2, and more
8783 recent (contemplated) versions over older ones. Closes
8786 o Minor features (geoip):
8787 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
8788 Country database. Closes ticket 26674.
8790 o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
8791 - Upon receiving a malformed connected cell, stop processing the
8792 cell immediately. Previously we would mark the connection for
8793 close, but continue processing the cell as if the connection were
8794 open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
8796 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
8797 - Allow the nanosleep() system call, which glibc uses to implement
8798 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
8800 o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
8801 - When running the hs_ntor_ref.py test, make sure only to pass
8802 strings (rather than "bytes" objects) to the Python subprocess
8803 module. Python 3 on Windows seems to require this. Fixes bug
8804 26535; bugfix on 0.3.1.1-alpha.
8805 - When running the ntor_ref.py test, make sure only to pass strings
8806 (rather than "bytes" objects) to the Python subprocess module.
8807 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
8810 o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
8811 - Work around a change in OpenSSL 1.1.1 where return values that
8812 would previously indicate "no password" now indicate an empty
8813 password. Without this workaround, Tor instances running with
8814 OpenSSL 1.1.1 would accept descriptors that other Tor instances
8815 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
8817 o Minor bugfixes (documentation, backport from 0.3.3.5-rc):
8818 - Document that the PerConnBW{Rate,Burst} options will fall back to
8819 their corresponding consensus parameters only if those parameters
8820 are set. Previously we had claimed that these values would always
8821 be set in the consensus. Fixes bug 25296; bugfix on 0.2.2.7-alpha.
8823 o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
8824 - Fix a compilation warning on some versions of GCC when building
8825 code that calls routerinfo_get_my_routerinfo() twice, assuming
8826 that the second call will succeed if the first one did. Fixes bug
8827 26269; bugfix on 0.2.8.2-alpha.
8829 o Minor bugfixes (client, backport from 0.3.4.1-alpha):
8830 - Don't consider Tor running as a client if the ControlPort is open,
8831 but no actual client ports are open. Fixes bug 26062; bugfix
8834 o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
8835 - Prevent a possible out-of-bounds smartlist read in
8836 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
8838 o Minor bugfixes (C correctness, backport from 0.3.3.4-alpha):
8839 - Fix a very unlikely (impossible, we believe) null pointer
8840 dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
8841 Coverity; this is CID 1430932.
8843 o Minor bugfixes (onion service, backport from 0.3.4.1-alpha):
8844 - Fix a memory leak when a v3 onion service is configured and gets a
8845 SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
8846 - When parsing the descriptor signature, look for the token plus an
8847 extra white-space at the end. This is more correct but also will
8848 allow us to support new fields that might start with "signature".
8849 Fixes bug 26069; bugfix on 0.3.0.1-alpha.
8851 o Minor bugfixes (relay, backport from 0.3.4.3-alpha):
8852 - Relays now correctly block attempts to re-extend to the previous
8853 relay by Ed25519 identity. Previously they would warn in this
8854 case, but not actually reject the attempt. Fixes bug 26158; bugfix
8857 o Minor bugfixes (relay, crash, backport from 0.3.4.1-alpha):
8858 - Avoid a crash when running with DirPort set but ORPort turned off.
8859 Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
8861 o Minor bugfixes (compilation, backport from 0.3.4.2-alpha):
8862 - Silence unused-const-variable warnings in zstd.h with some GCC
8863 versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
8865 o Minor bugfixes (testing, backport from 0.3.3.4-alpha):
8866 - Avoid intermittent test failures due to a test that had relied on
8867 onion service introduction point creation finishing within 5
8868 seconds of real clock time. Fixes bug 25450; bugfix
8871 o Minor bugfixes (compilation, backport from 0.3.3.4-alpha):
8872 - Fix a C99 compliance issue in our configuration script that caused
8873 compilation issues when compiling Tor with certain versions of
8874 xtools. Fixes bug 25474; bugfix on 0.3.2.5-alpha.
8876 o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
8877 - Fix a number of small memory leaks identified by coverity. Fixes
8878 bug 26467; bugfix on numerous Tor versions.
8880 o Code simplification and refactoring (backport from 0.3.3.5-rc):
8881 - Move the list of default directory authorities to its own file.
8882 Closes ticket 24854. Patch by "beastr0".
8885 Changes in version 0.2.9.16 - 2018-07-13
8886 Tor 0.2.9.16 moves to a new bridge authority, meaning people running
8887 bridge relays should upgrade. We also take this opportunity to backport
8890 o Directory authority changes:
8891 - The "Bifroest" bridge authority has been retired; the new bridge
8892 authority is "Serge", and it is operated by George from the
8893 TorBSD project. Closes ticket 26771.
8895 o Directory authority changes (backport from 0.3.3.7):
8896 - Add an IPv6 address for the "dannenberg" directory authority.
8897 Closes ticket 26343.
8899 o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
8900 - When directory authorities read a zero-byte bandwidth file, they
8901 would previously log a warning with the contents of an
8902 uninitialised buffer. They now log a warning about the empty file
8903 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
8905 o Minor features (sandbox, backport from 0.3.3.4-alpha):
8906 - Explicitly permit the poll() system call when the Linux
8907 seccomp2-based sandbox is enabled: apparently, some versions of
8908 libc use poll() when calling getpwnam(). Closes ticket 25313.
8910 o Minor features (continuous integration, backport from 0.3.4.1-alpha):
8911 - Our .travis.yml configuration now includes support for testing the
8912 results of "make distcheck". (It's not uncommon for "make check"
8913 to pass but "make distcheck" to fail.) Closes ticket 25814.
8914 - Our Travis CI configuration now integrates with the Coveralls
8915 coverage analysis tool. Closes ticket 25818.
8917 o Minor features (compilation, backport from 0.3.4.4-rc):
8918 - When building Tor, prefer to use Python 3 over Python 2, and more
8919 recent (contemplated) versions over older ones. Closes
8922 o Minor features (geoip):
8923 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
8924 Country database. Closes ticket 26674.
8926 o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
8927 - Upon receiving a malformed connected cell, stop processing the
8928 cell immediately. Previously we would mark the connection for
8929 close, but continue processing the cell as if the connection were
8930 open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
8932 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
8933 - Allow the nanosleep() system call, which glibc uses to implement
8934 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
8936 o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
8937 - When running the ntor_ref.py test, make sure only to pass strings
8938 (rather than "bytes" objects) to the Python subprocess module.
8939 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
8942 o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
8943 - Work around a change in OpenSSL 1.1.1 where return values that
8944 would previously indicate "no password" now indicate an empty
8945 password. Without this workaround, Tor instances running with
8946 OpenSSL 1.1.1 would accept descriptors that other Tor instances
8947 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
8949 o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
8950 - Fix a compilation warning on some versions of GCC when building
8951 code that calls routerinfo_get_my_routerinfo() twice, assuming
8952 that the second call will succeed if the first one did. Fixes bug
8953 26269; bugfix on 0.2.8.2-alpha.
8955 o Minor bugfixes (client, backport from 0.3.4.1-alpha):
8956 - Don't consider Tor running as a client if the ControlPort is open,
8957 but no actual client ports are open. Fixes bug 26062; bugfix
8960 o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
8961 - Prevent a possible out-of-bounds smartlist read in
8962 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
8964 o Minor bugfixes (C correctness, backport from 0.3.3.4-alpha):
8965 - Fix a very unlikely (impossible, we believe) null pointer
8966 dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
8967 Coverity; this is CID 1430932.
8969 o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
8970 - Fix a number of small memory leaks identified by coverity. Fixes
8971 bug 26467; bugfix on numerous Tor versions.
8973 o Code simplification and refactoring (backport from 0.3.3.5-rc):
8974 - Move the list of default directory authorities to its own file.
8975 Closes ticket 24854. Patch by "beastr0".
8978 Changes in version 0.3.4.4-rc - 2018-07-09
8979 Tor 0.3.4.4-rc fixes several small compilation, portability, and
8980 correctness issues in previous versions of Tor. This version is a
8981 release candidate: if no serious bugs are found, we expect that the
8982 stable 0.3.4 release will be (almost) the same as this release.
8984 o Minor features (compilation):
8985 - When building Tor, prefer to use Python 3 over Python 2, and more
8986 recent (contemplated) versions over older ones. Closes
8989 o Minor features (geoip):
8990 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
8991 Country database. Closes ticket 26674.
8993 o Minor features (Rust, portability):
8994 - Rust cross-compilation is now supported. Closes ticket 25895.
8996 o Minor bugfixes (compilation):
8997 - Fix a compilation warning on some versions of GCC when building
8998 code that calls routerinfo_get_my_routerinfo() twice, assuming
8999 that the second call will succeed if the first one did. Fixes bug
9000 26269; bugfix on 0.2.8.2-alpha.
9002 o Minor bugfixes (control port):
9003 - Report the port correctly when a port is configured to bind to
9004 "auto". Fixes bug 26568; bugfix on 0.3.4.1-alpha.
9005 - Handle the HSADDRESS= argument to the HSPOST command properly.
9006 (Previously, this argument was misparsed and thus ignored.) Fixes
9007 bug 26523; bugfix on 0.3.3.1-alpha. Patch by "akwizgran".
9009 o Minor bugfixes (correctness, flow control):
9010 - Upon receiving a stream-level SENDME cell, verify that our window
9011 has not grown too large. Fixes bug 26214; bugfix on svn
9014 o Minor bugfixes (memory, correctness):
9015 - Fix a number of small memory leaks identified by coverity. Fixes
9016 bug 26467; bugfix on numerous Tor versions.
9018 o Minor bugfixes (testing, compatibility):
9019 - When running the hs_ntor_ref.py test, make sure only to pass
9020 strings (rather than "bytes" objects) to the Python subprocess
9021 module. Python 3 on Windows seems to require this. Fixes bug
9022 26535; bugfix on 0.3.1.1-alpha.
9023 - When running the ntor_ref.py test, make sure only to pass strings
9024 (rather than "bytes" objects) to the Python subprocess module.
9025 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
9029 Changes in version 0.3.3.8 - 2018-07-09
9030 Tor 0.3.3.8 backports several changes from the 0.3.4.x series, including
9031 fixes for a memory leak affecting directory authorities.
9033 o Major bugfixes (directory authority, backport from 0.3.4.3-alpha):
9034 - Stop leaking memory on directory authorities when planning to
9035 vote. This bug was crashing authorities by exhausting their
9036 memory. Fixes bug 26435; bugfix on 0.3.3.6.
9038 o Major bugfixes (rust, testing, backport from 0.3.4.3-alpha):
9039 - Make sure that failing tests in Rust will actually cause the build
9040 to fail: previously, they were ignored. Fixes bug 26258; bugfix
9043 o Minor features (compilation, backport from 0.3.4.4-rc):
9044 - When building Tor, prefer to use Python 3 over Python 2, and more
9045 recent (contemplated) versions over older ones. Closes
9048 o Minor features (geoip):
9049 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
9050 Country database. Closes ticket 26674.
9052 o Minor features (relay, diagnostic, backport from 0.3.4.3-alpha):
9053 - Add several checks to detect whether Tor relays are uploading
9054 their descriptors without specifying why they regenerated them.
9055 Diagnostic for ticket 25686.
9057 o Minor bugfixes (circuit path selection, backport from 0.3.4.1-alpha):
9058 - Don't count path selection failures as circuit build failures.
9059 This change should eliminate cases where Tor blames its guard or
9060 the network for situations like insufficient microdescriptors
9061 and/or overly restrictive torrc settings. Fixes bug 25705; bugfix
9064 o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
9065 - Fix a compilation warning on some versions of GCC when building
9066 code that calls routerinfo_get_my_routerinfo() twice, assuming
9067 that the second call will succeed if the first one did. Fixes bug
9068 26269; bugfix on 0.2.8.2-alpha.
9070 o Minor bugfixes (control port, backport from 0.3.4.4-rc):
9071 - Handle the HSADDRESS= argument to the HSPOST command properly.
9072 (Previously, this argument was misparsed and thus ignored.) Fixes
9073 bug 26523; bugfix on 0.3.3.1-alpha. Patch by "akwizgran".
9075 o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
9076 - Fix a number of small memory leaks identified by coverity. Fixes
9077 bug 26467; bugfix on numerous Tor versions.
9079 o Minor bugfixes (relay, backport from 0.3.4.3-alpha):
9080 - Relays now correctly block attempts to re-extend to the previous
9081 relay by Ed25519 identity. Previously they would warn in this
9082 case, but not actually reject the attempt. Fixes bug 26158; bugfix
9085 o Minor bugfixes (restart-in-process, backport from 0.3.4.1-alpha):
9086 - When shutting down, Tor now clears all the flags in the control.c
9087 module. This should prevent a bug where authentication cookies are
9088 not generated on restart. Fixes bug 25512; bugfix on 0.3.3.1-alpha.
9090 o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
9091 - When running the hs_ntor_ref.py test, make sure only to pass
9092 strings (rather than "bytes" objects) to the Python subprocess
9093 module. Python 3 on Windows seems to require this. Fixes bug
9094 26535; bugfix on 0.3.1.1-alpha.
9095 - When running the ntor_ref.py test, make sure only to pass strings
9096 (rather than "bytes" objects) to the Python subprocess module.
9097 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
9101 Changes in version 0.3.4.3-alpha - 2018-06-26
9102 Tor 0.3.4.3-alpha fixes several bugs in earlier versions, including
9103 one that was causing stability issues on directory authorities.
9105 o Major bugfixes (directory authority):
9106 - Stop leaking memory on directory authorities when planning to
9107 vote. This bug was crashing authorities by exhausting their
9108 memory. Fixes bug 26435; bugfix on 0.3.3.6.
9110 o Major bugfixes (rust, testing):
9111 - Make sure that failing tests in Rust will actually cause the build
9112 to fail: previously, they were ignored. Fixes bug 26258; bugfix
9115 o Minor feature (directory authorities):
9116 - Stop warning about incomplete bw lines before the first complete
9117 bw line has been found, so that additional header lines can be
9118 ignored. Fixes bug 25960; bugfix on 0.2.2.1-alpha
9120 o Minor features (relay, diagnostic):
9121 - Add several checks to detect whether Tor relays are uploading
9122 their descriptors without specifying why they regenerated them.
9123 Diagnostic for ticket 25686.
9125 o Minor features (unit tests):
9126 - Test complete bandwidth measurements files, and test that
9127 incomplete bandwidth lines only give warnings when the end of the
9128 header has not been detected. Fixes bug 25947; bugfix
9131 o Minor bugfixes (compilation):
9132 - Refrain from compiling unit testing related object files when
9133 --disable-unittests is set to configure script. Fixes bug 24891;
9134 bugfix on 0.2.5.1-alpha.
9135 - When linking the libtor_testing.a library, only include the
9136 dirauth object files once. Previously, they were getting added
9137 twice. Fixes bug 26402; bugfix on 0.3.4.1-alpha.
9138 - The --enable-fatal-warnings flag now affects Rust code as well.
9139 Closes ticket 26245.
9141 o Minor bugfixes (onion services):
9142 - Recompute some consensus information after detecting a clock jump,
9143 or after transitioning from a non-live consensus to a live
9144 consensus. We do this to avoid having an outdated state, and
9145 miscalculating the index for next-generation onion services. Fixes
9146 bug 24977; bugfix on 0.3.2.1-alpha.
9148 o Minor bugfixes (relay):
9149 - Relays now correctly block attempts to re-extend to the previous
9150 relay by Ed25519 identity. Previously they would warn in this
9151 case, but not actually reject the attempt. Fixes bug 26158; bugfix
9154 o Minor bugfixes (testing):
9155 - Fix compilation of the doctests in the Rust crypto crate. Fixes
9156 bug 26415; bugfix on 0.3.4.1-alpha.
9157 - Instead of trying to read the geoip configuration files from
9158 within the unit tests, instead create our own ersatz files with
9159 just enough geoip data in the format we expect. Trying to read
9160 from the source directory created problems on Windows with mingw,
9161 where the build system's paths are not the same as the platform's
9162 paths. Fixes bug 25787; bugfix on 0.3.4.1-alpha.
9163 - Refrain from trying to get an item from an empty smartlist in
9164 test_bridges_clear_bridge_list. Set DEBUG_SMARTLIST in unit tests
9165 to catch improper smartlist usage. Furthermore, enable
9166 DEBUG_SMARTLIST globally when build is configured with fragile
9167 hardening. Fixes bug 26196; bugfix on 0.3.4.1-alpha.
9170 Changes in version 0.3.3.7 - 2018-06-12
9171 Tor 0.3.3.7 backports several changes from the 0.3.4.x series, including
9172 fixes for bugs affecting compatibility and stability.
9174 o Directory authority changes:
9175 - Add an IPv6 address for the "dannenberg" directory authority.
9176 Closes ticket 26343.
9178 o Minor features (geoip):
9179 - Update geoip and geoip6 to the June 7 2018 Maxmind GeoLite2
9180 Country database. Closes ticket 26351.
9182 o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
9183 - Work around a change in OpenSSL 1.1.1 where return values that
9184 would previously indicate "no password" now indicate an empty
9185 password. Without this workaround, Tor instances running with
9186 OpenSSL 1.1.1 would accept descriptors that other Tor instances
9187 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
9189 o Minor bugfixes (compilation, backport from 0.3.4.2-alpha):
9190 - Silence unused-const-variable warnings in zstd.h with some GCC
9191 versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
9193 o Minor bugfixes (controller, backport from 0.3.4.2-alpha):
9194 - Improve accuracy of the BUILDTIMEOUT_SET control port event's
9195 TIMEOUT_RATE and CLOSE_RATE fields. (We were previously
9196 miscounting the total number of circuits for these field values.)
9197 Fixes bug 26121; bugfix on 0.3.3.1-alpha.
9199 o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
9200 - Prevent a possible out-of-bounds smartlist read in
9201 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
9203 o Minor bugfixes (path selection, backport from 0.3.4.1-alpha):
9204 - Only select relays when they have the descriptors we prefer to use
9205 for them. This change fixes a bug where we could select a relay
9206 because it had _some_ descriptor, but reject it later with a
9207 nonfatal assertion error because it didn't have the exact one we
9208 wanted. Fixes bugs 25691 and 25692; bugfix on 0.3.3.4-alpha.
9211 Changes in version 0.3.4.2-alpha - 2018-06-12
9212 Tor 0.3.4.2-alpha fixes several minor bugs in the previous alpha
9213 release, and forward-ports an authority-only security fix from 0.3.3.6.
9215 o Directory authority changes:
9216 - Add an IPv6 address for the "dannenberg" directory authority.
9217 Closes ticket 26343.
9219 o Major bugfixes (security, directory authority, denial-of-service, also in 0.3.3.6):
9220 - Fix a bug that could have allowed an attacker to force a directory
9221 authority to use up all its RAM by passing it a maliciously
9222 crafted protocol versions string. Fixes bug 25517; bugfix on
9223 0.2.9.4-alpha. This issue is also tracked as TROVE-2018-005.
9225 o Minor features (continuous integration):
9226 - Add the necessary configuration files for continuous integration
9227 testing on Windows, via the Appveyor platform. Closes ticket
9228 25549. Patches from Marcin Cieślak and Isis Lovecruft.
9230 o Minor features (geoip):
9231 - Update geoip and geoip6 to the June 7 2018 Maxmind GeoLite2
9232 Country database. Closes ticket 26351.
9234 o Minor bugfixes (compatibility, openssl):
9235 - Work around a change in OpenSSL 1.1.1 where return values that
9236 would previously indicate "no password" now indicate an empty
9237 password. Without this workaround, Tor instances running with
9238 OpenSSL 1.1.1 would accept descriptors that other Tor instances
9239 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
9241 o Minor bugfixes (compilation):
9242 - Silence unused-const-variable warnings in zstd.h with some GCC
9243 versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
9244 - Fix compilation when using OpenSSL 1.1.0 with the "no-deprecated"
9245 flag enabled. Fixes bug 26156; bugfix on 0.3.4.1-alpha.
9246 - Avoid a compiler warning when casting the return value of
9247 smartlist_len() to double with DEBUG_SMARTLIST enabled. Fixes bug
9248 26283; bugfix on 0.2.4.10-alpha.
9250 o Minor bugfixes (control port):
9251 - Do not count 0-length RELAY_COMMAND_DATA cells as valid data in
9252 CIRC_BW events. Previously, such cells were counted entirely in
9253 the OVERHEAD field. Now they are not. Fixes bug 26259; bugfix
9256 o Minor bugfixes (controller):
9257 - Improve accuracy of the BUILDTIMEOUT_SET control port event's
9258 TIMEOUT_RATE and CLOSE_RATE fields. (We were previously
9259 miscounting the total number of circuits for these field values.)
9260 Fixes bug 26121; bugfix on 0.3.3.1-alpha.
9262 o Minor bugfixes (hardening):
9263 - Prevent a possible out-of-bounds smartlist read in
9264 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
9266 o Minor bugfixes (onion services):
9267 - Fix a bug that blocked the creation of ephemeral v3 onion
9268 services. Fixes bug 25939; bugfix on 0.3.4.1-alpha.
9270 o Minor bugfixes (test coverage tools):
9271 - Update our "cov-diff" script to handle output from the latest
9272 version of gcov, and to remove extraneous timestamp information
9273 from its output. Fixes bugs 26101 and 26102; bugfix
9277 Changes in version 0.3.3.6 - 2018-05-22
9278 Tor 0.3.3.6 is the first stable release in the 0.3.3 series. It
9279 backports several important fixes from the 0.3.4.1-alpha.
9281 The Tor 0.3.3 series includes controller support and other
9282 improvements for v3 onion services, official support for embedding Tor
9283 within other applications, and our first non-trivial module written in
9284 the Rust programming language. (Rust is still not enabled by default
9285 when building Tor.) And as usual, there are numerous other smaller
9286 bugfixes, features, and improvements.
9288 Below are the changes since 0.3.3.5-rc. For a list of all changes
9289 since 0.3.2.10, see the ReleaseNotes file.
9291 o Major bugfixes (directory authorities, security, backport from 0.3.4.1-alpha):
9292 - When directory authorities read a zero-byte bandwidth file, they
9293 would previously log a warning with the contents of an
9294 uninitialised buffer. They now log a warning about the empty file
9295 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
9297 o Major bugfixes (security, directory authority, denial-of-service):
9298 - Fix a bug that could have allowed an attacker to force a directory
9299 authority to use up all its RAM by passing it a maliciously
9300 crafted protocol versions string. Fixes bug 25517; bugfix on
9301 0.2.9.4-alpha. This issue is also tracked as TROVE-2018-005.
9303 o Major bugfixes (crash, backport from 0.3.4.1-alpha):
9304 - Avoid a rare assertion failure in the circuit build timeout code
9305 if we fail to allow any circuits to actually complete. Fixes bug
9306 25733; bugfix on 0.2.2.2-alpha.
9308 o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
9309 - Avoid a crash when testing router reachability on a router that
9310 could have an ed25519 ID, but which does not. Fixes bug 25415;
9311 bugfix on 0.3.3.2-alpha.
9313 o Major bugfixes (onion service, backport from 0.3.4.1-alpha):
9314 - Correctly detect when onion services get disabled after HUP. Fixes
9315 bug 25761; bugfix on 0.3.2.1.
9317 o Major bugfixes (relay, denial of service, backport from 0.3.4.1-alpha):
9318 - Impose a limit on circuit cell queue size. The limit can be
9319 controlled by a consensus parameter. Fixes bug 25226; bugfix
9322 o Minor features (compatibility, backport from 0.3.4.1-alpha):
9323 - Avoid some compilation warnings with recent versions of LibreSSL.
9324 Closes ticket 26006.
9326 o Minor features (continuous integration, backport from 0.3.4.1-alpha):
9327 - Our .travis.yml configuration now includes support for testing the
9328 results of "make distcheck". (It's not uncommon for "make check"
9329 to pass but "make distcheck" to fail.) Closes ticket 25814.
9330 - Our Travis CI configuration now integrates with the Coveralls
9331 coverage analysis tool. Closes ticket 25818.
9333 o Minor features (geoip):
9334 - Update geoip and geoip6 to the May 1 2018 Maxmind GeoLite2 Country
9335 database. Closes ticket 26104.
9337 o Minor bugfixes (client, backport from 0.3.4.1-alpha):
9338 - Don't consider Tor running as a client if the ControlPort is open,
9339 but no actual client ports are open. Fixes bug 26062; bugfix
9342 o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
9343 - Upon receiving a malformed connected cell, stop processing the
9344 cell immediately. Previously we would mark the connection for
9345 close, but continue processing the cell as if the connection were
9346 open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
9348 o Minor bugfixes (documentation, backport from 0.3.4.1-alpha):
9349 - Stop saying in the manual that clients cache ipv4 dns answers from
9350 exit relays. We haven't used them since 0.2.6.3-alpha, and in
9351 ticket 24050 we stopped even caching them as of 0.3.2.6-alpha, but
9352 we forgot to say so in the man page. Fixes bug 26052; bugfix
9355 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
9356 - Allow the nanosleep() system call, which glibc uses to implement
9357 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
9359 o Minor bugfixes (onion service, backport from 0.3.4.1-alpha):
9360 - Fix a memory leak when a v3 onion service is configured and gets a
9361 SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
9362 - When parsing the descriptor signature, look for the token plus an
9363 extra white-space at the end. This is more correct but also will
9364 allow us to support new fields that might start with "signature".
9365 Fixes bug 26069; bugfix on 0.3.0.1-alpha.
9367 o Minor bugfixes (relay, crash, backport from 0.3.4.1-alpha):
9368 - Avoid a crash when running with DirPort set but ORPort turned off.
9369 Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
9371 o Documentation (backport from 0.3.4.1-alpha):
9372 - Correct an IPv6 error in the documentation for ExitPolicy. Closes
9373 ticket 25857. Patch from "CTassisF".
9376 Changes in version 0.3.4.1-alpha - 2018-05-17
9377 Tor 0.3.4.1-alpha is the first release in the 0.3.4.x series. It
9378 includes refactoring to begin reducing Tor's binary size and idle CPU
9379 usage on mobile, along with prep work for new bandwidth scanners,
9380 improvements to the experimental "vanguards" feature, and numerous
9381 other small features and bugfixes.
9383 o New system requirements:
9384 - Tor no longer tries to support old operating systems without
9385 mmap() or some local equivalent. Apparently, compilation on such
9386 systems has been broken for some time, without anybody noticing or
9387 complaining. Closes ticket 25398.
9389 o Major feature (directory authority, modularization):
9390 - The directory authority subsystem has been modularized. The code
9391 is now located in src/or/dirauth/, and is compiled in by default.
9392 To disable the module, the configure option
9393 --disable-module-dirauth has been added. This module may be
9394 disabled by default in some future release. Closes ticket 25610.
9396 o Major features (main loop, CPU usage):
9397 - When Tor is disabled (via DisableNetwork or via hibernation), it
9398 no longer needs to run any per-second events. This change should
9399 make it easier for mobile applications to disable Tor while the
9400 device is sleeping, or Tor is not running. Closes ticket 26063.
9401 - Tor no longer enables all of its periodic events by default.
9402 Previously, Tor would enable all possible main loop events,
9403 regardless of whether it needed them. Furthermore, many of these
9404 events are now disabled with Tor is hibernating or DisableNetwork
9405 is set. This is a big step towards reducing client CPU usage by
9406 reducing the amount of wake-ups the daemon does. Closes ticket
9408 - The bandwidth-limitation logic has been refactored so that
9409 bandwidth calculations are performed on-demand, rather than every
9410 TokenBucketRefillInterval milliseconds. This change should improve
9411 the granularity of our bandwidth calculations, and limit the
9412 number of times that the Tor process needs to wake up when it is
9413 idle. Closes ticket 25373.
9414 - Move responsibility for many operations from a once-per-second
9415 callback to a callback that is only scheduled as needed. Moving
9416 this functionality has allowed us to disable the callback when
9417 Tor's network is disabled. Once enough items are removed from our
9418 once-per-second callback, we can eliminate it entirely to conserve
9419 CPU when idle. The functionality removed includes: closing
9420 connections, circuits, and channels (ticket 25932); consensus
9421 voting (25937); flushing log callbacks (25951); honoring delayed
9422 SIGNEWNYM requests (25949); rescanning the consensus cache
9423 (25931); saving the state file to disk (25948); warning relay
9424 operators about unreachable ports (25952); and keeping track of
9425 Tor's uptime (26009).
9427 o Major bugfixes (directory authorities, security):
9428 - When directory authorities read a zero-byte bandwidth file, they
9429 would previously log a warning with the contents of an
9430 uninitialised buffer. They now log a warning about the empty file
9431 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
9433 o Major bugfixes (crash):
9434 - Avoid a rare assertion failure in the circuit build timeout code
9435 if we fail to allow any circuits to actually complete. Fixes bug
9436 25733; bugfix on 0.2.2.2-alpha.
9438 o Major bugfixes (directory authority):
9439 - Avoid a crash when testing router reachability on a router that
9440 could have an ed25519 ID, but which does not. Fixes bug 25415;
9441 bugfix on 0.3.3.2-alpha.
9443 o Major bugfixes (onion service):
9444 - Correctly detect when onion services get disabled after HUP. Fixes
9445 bug 25761; bugfix on 0.3.2.1.
9447 o Major bugfixes (protover, voting):
9448 - Revise Rust implementation of protover to use a more memory-
9449 efficient voting algorithm and corresponding data structures, thus
9450 avoiding a potential (but small impact) DoS attack where specially
9451 crafted protocol strings would expand to several potential
9452 megabytes in memory. In the process, several portions of code were
9453 revised to be methods on new, custom types, rather than functions
9454 taking interchangeable types, thus increasing type safety of the
9455 module. Custom error types and handling were added as well, in
9456 order to facilitate better error dismissal/handling in outside
9457 crates and avoid mistakenly passing an internal error string to C
9458 over the FFI boundary. Many tests were added, and some previous
9459 differences between the C and Rust implementations have been
9460 remedied. Fixes bug 24031; bugfix on 0.3.3.1-alpha.
9462 o Major bugfixes (relay, denial of service):
9463 - Impose a limit on circuit cell queue size. The limit can be
9464 controlled by a consensus parameter. Fixes bug 25226; bugfix
9467 o Minor features (accounting):
9468 - When Tor becomes dormant, it now uses a scheduled event to wake up
9469 at the right time. Previously, we would use the per-second timer
9470 to check whether to wake up, but we no longer have any per-second
9471 timers enabled when the network is disabled. Closes ticket 26064.
9473 o Minor features (code quality):
9474 - Add optional spell-checking for the Tor codebase, using the
9475 "misspell" program. To use this feature, run "make check-typos".
9476 Closes ticket 25024.
9478 o Minor features (compatibility):
9479 - Tor now detects versions of OpenSSL 1.1.0 and later compiled with
9480 the no-deprecated option, and builds correctly with them. Closes
9481 tickets 19429, 19981, and 25353.
9482 - Avoid some compilation warnings with recent versions of LibreSSL.
9483 Closes ticket 26006.
9485 o Minor features (compression, zstd):
9486 - When running with zstd, Tor now considers using advanced functions
9487 that the zstd maintainers have labeled as potentially unstable. To
9488 prevent breakage, Tor will only use this functionality when the
9489 runtime version of the zstd library matches the version with which
9490 Tor was compiled. Closes ticket 25162.
9492 o Minor features (configuration):
9493 - The "DownloadSchedule" options have been renamed to end with
9494 "DownloadInitialDelay". The old names are still allowed, but will
9495 produce a warning. Comma-separated lists are still permitted for
9496 these options, but all values after the first are ignored (as they
9497 have been since 0.2.9). Closes ticket 23354.
9499 o Minor features (continuous integration):
9500 - Our .travis.yml configuration now includes support for testing the
9501 results of "make distcheck". (It's not uncommon for "make check"
9502 to pass but "make distcheck" to fail.) Closes ticket 25814.
9503 - Our Travis CI configuration now integrates with the Coveralls
9504 coverage analysis tool. Closes ticket 25818.
9506 o Minor features (control port):
9507 - Introduce GETINFO "current-time/{local,utc}" to return the local
9508 and UTC times respectively in ISO format. This helps a controller
9509 like Tor Browser detect a time-related error. Closes ticket 25511.
9510 Patch by Neel Chauhan.
9511 - Introduce new fields to the CIRC_BW event. There are two new
9512 fields in each of the read and written directions. The DELIVERED
9513 fields report the total valid data on the circuit, as measured by
9514 the payload sizes of verified and error-checked relay command
9515 cells. The OVERHEAD fields report the total unused bytes in each
9516 of these cells. Closes ticket 25903.
9518 o Minor features (directory authority):
9519 - Directory authorities now open their key-pinning files as O_SYNC,
9520 to limit their chances of accidentally writing partial lines.
9521 Closes ticket 23909.
9523 o Minor features (directory authority, forward compatibility):
9524 - Make the lines of the measured bandwidth file able to contain
9525 their entries in any order. Previously, the node_id entry needed
9526 to come first. Closes ticket 26004.
9528 o Minor features (entry guards):
9529 - Introduce a new torrc option NumPrimaryGuards for controlling the
9530 number of primary guards. Closes ticket 25843.
9532 o Minor features (geoip):
9533 - Update geoip and geoip6 to the May 1 2018 Maxmind GeoLite2 Country
9534 database. Closes ticket 26104.
9536 o Minor features (performance):
9537 - Avoid a needless call to malloc() when processing an incoming
9538 relay cell. Closes ticket 24914.
9539 - Make our timing-wheel code run a tiny bit faster on 32-bit
9540 platforms, by preferring 32-bit math to 64-bit. Closes
9542 - Avoid a needless malloc()/free() pair every time we handle an ntor
9543 handshake. Closes ticket 25150.
9545 o Minor features (testing):
9546 - Add a unit test for voting_schedule_get_start_of_next_interval().
9547 Closes ticket 26014, and helps make unit test coverage
9549 - A new unittests module specifically for testing the functions in
9550 the (new-ish) bridges.c module has been created with new
9551 unittests, raising the code coverage percentages. Closes 25425.
9552 - We now have improved testing for addressmap_get_virtual_address()
9553 function. This should improve our test coverage, and make our test
9554 coverage more deterministic. Closes ticket 25993.
9556 o Minor features (timekeeping, circuit scheduling):
9557 - When keeping track of how busy each circuit have been recently on
9558 a given connection, use coarse-grained monotonic timers rather
9559 than gettimeofday(). This change should marginally increase
9560 accuracy and performance. Implements part of ticket 25927.
9562 o Minor bugfixes (bandwidth management):
9563 - Consider ourselves "low on write bandwidth" if we have exhausted
9564 our write bandwidth some time in the last second. This was the
9565 documented behavior before, but the actual behavior was to change
9566 this value every TokenBucketRefillInterval. Fixes bug 25828;
9567 bugfix on 0.2.3.5-alpha.
9569 o Minor bugfixes (C correctness):
9570 - Add a missing lock acquisition in the shutdown code of the control
9571 subsystem. Fixes bug 25675; bugfix on 0.2.7.3-rc. Found by
9572 Coverity; this is CID 1433643.
9574 o Minor bugfixes (circuit path selection):
9575 - Don't count path selection failures as circuit build failures.
9576 This change should eliminate cases where Tor blames its guard or
9577 the network for situations like insufficient microdescriptors
9578 and/or overly restrictive torrc settings. Fixes bug 25705; bugfix
9581 o Minor bugfixes (client):
9582 - Don't consider Tor running as a client if the ControlPort is open,
9583 but no actual client ports are open. Fixes bug 26062; bugfix
9586 o Minor bugfixes (code style):
9587 - Fixed multiple includes of transports.h in src/or/connection.c
9588 Fixes bug 25261; bugfix on 0.2.5.1-alpha.
9589 - Remove the unused variable n_possible from the function
9590 channel_get_for_extend(). Fixes bug 25645; bugfix on 0.2.4.4-alpha
9592 o Minor bugfixes (control interface):
9593 - Respond with more human-readable error messages to GETINFO exit-
9594 policy/* requests. Also, let controller know if an error is
9595 transient (response code 551) or not (response code 552). Fixes
9596 bug 25852; bugfix on 0.2.8.1-alpha.
9598 o Minor bugfixes (controller):
9599 - Make CIRC_BW event reflect the total of all data sent on a
9600 circuit, including padding and dropped cells. Also fix a mis-
9601 counting bug when STREAM_BW events were enabled. Fixes bug 25400;
9602 bugfix on 0.2.5.2-alpha.
9604 o Minor bugfixes (correctness, client):
9605 - Upon receiving a malformed connected cell, stop processing the cell
9606 immediately. Previously we would mark the connection for close, but
9607 continue processing the cell as if the connection were open. Fixes bug
9608 26072; bugfix on 0.2.4.7-alpha.
9610 o Minor bugfixes (directory client):
9611 - When unverified-consensus is verified, rename it to cached-
9612 consenus. Fixes bug 4187; bugfix on 0.2.0.3-alpha.
9613 - Fixed launching a certificate fetch always during the scheduled
9614 periodic consensus fetch by fetching only in those cases when
9615 consensus are waiting for certs. Fixes bug 24740; bugfix
9618 o Minor bugfixes (documentation):
9619 - Stop saying in the manual that clients cache ipv4 dns answers from
9620 exit relays. We haven't used them since 0.2.6.3-alpha, and in
9621 ticket 24050 we stopped even caching them as of 0.3.2.6-alpha, but
9622 we forgot to say so in the man page. Fixes bug 26052; bugfix
9625 o Minor bugfixes (error reporting):
9626 - Improve tolerance for directory authorities with skewed clocks.
9627 Previously, an authority with a clock more than 60 seconds ahead
9628 could cause a client with a correct clock to warn that the
9629 client's clock was behind. Now the clocks of a majority of
9630 directory authorities have to be ahead of the client before this
9631 warning will occur. Fixes bug 25756; bugfix on 0.2.2.25-alpha.
9633 o Minor bugfixes (Linux seccomp2 sandbox):
9634 - Allow the nanosleep() system call, which glibc uses to implement
9635 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
9637 o Minor bugfixes (onion service):
9638 - Fix a memory leak when a v3 onion service is configured and gets a
9639 SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
9640 - When parsing the descriptor signature, look for the token plus an
9641 extra white-space at the end. This is more correct but also will
9642 allow us to support new fields that might start with "signature".
9643 Fixes bug 26069; bugfix on 0.3.0.1-alpha.
9645 o Minor bugfixes (path selection):
9646 - Only select relays when they have the descriptors we prefer to use
9647 for them. This change fixes a bug where we could select a relay
9648 because it had _some_ descriptor, but reject it later with a
9649 nonfatal assertion error because it didn't have the exact one we
9650 wanted. Fixes bugs 25691 and 25692; bugfix on 0.3.3.4-alpha.
9652 o Minor bugfixes (portability):
9653 - Do not align mmap length, as it is not required by POSIX, and the
9654 getpagesize function is deprecated. Fixes bug 25399; bugfix
9657 o Minor bugfixes (portability, FreeBSD):
9658 - In have_enough_mem_for_dircache(), the variable DIRCACHE_MIN_MEM_MB
9659 does not stringify on FreeBSD, so we switch to tor_asprintf().
9660 Fixes bug 20887; bugfix on 0.2.8.1-alpha. Patch by Neel Chauhan.
9662 o Minor bugfixes (relay statistics):
9663 - When a relay is collecting internal statistics about how many
9664 create cell requests it has seen of each type, accurately count
9665 the requests from relays that temporarily fall out of the
9666 consensus. (To be extra conservative, we were already ignoring
9667 requests from clients in our counts, and we continue ignoring them
9668 here.) Fixes bug 24910; bugfix on 0.2.4.17-rc.
9670 o Minor bugfixes (relay, crash):
9671 - Avoid a crash when running with DirPort set but ORPort turned off.
9672 Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
9674 o Minor bugfixes (restart-in-process):
9675 - When shutting down, Tor now clears all the flags in the control.c
9676 module. This should prevent a bug where authentication cookies are
9677 not generated on restart. Fixes bug 25512; bugfix on 0.3.3.1-alpha.
9679 o Minor bugfixes (testing):
9680 - When testing workqueue event-cancellation, make sure that we
9681 actually cancel an event, and that cancel each event with equal
9682 probability. (It was previously possible, though extremely
9683 unlikely, for our event-canceling test not to cancel any events.)
9684 Fixes bug 26008; bugfix on 0.2.6.3-alpha.
9685 - Repeat part of the test in test_client_pick_intro() a number of
9686 times, to give it consistent coverage. Fixes bug 25996; bugfix
9688 - Remove randomness from the hs_common/responsible_hsdirs test, so
9689 that it always takes the same path through the function it tests.
9690 Fixes bug 25997; bugfix on 0.3.2.1-alpha.
9691 - Change the behavior of the "channel/outbound" test so that it
9692 never causes a 10-second rollover for the EWMA circuitmux code.
9693 Previously, this behavior would happen randomly, and result in
9694 fluctuating test coverage. Fixes bug 25994; bugfix
9696 - Use X509_new() to allocate certificates that will be freed later
9697 with X509_free(). Previously, some parts of the unit tests had
9698 used tor_malloc_zero(), which is incorrect, and which caused test
9699 failures on Windows when they were built with extra hardening.
9700 Fixes bugs 25943 and 25944; bugfix on 0.2.8.1-alpha. Patch by
9702 - While running the circuit_timeout test, fix the PRNG to a
9703 deterministic AES stream, so that the test coverage from this test
9704 will itself be deterministic. Fixes bug 25995; bugfix
9707 o Minor bugfixes (vanguards):
9708 - Allow the last hop in a vanguard circuit to be the same as our
9709 first, to prevent the adversary from influencing guard node choice
9710 by choice of last hop. Also prevent the creation of A - B - A
9711 paths, or A - A paths, which are forbidden by relays. Fixes bug
9712 25870; bugfix on 0.3.3.1-alpha.
9714 o Code simplification and refactoring:
9715 - Remove duplicate code in parse_{c,s}method_line and bootstrap
9716 their functionalities into a single function. Fixes bug 6236;
9717 bugfix on 0.2.3.6-alpha.
9718 - We remove the PortForwarding and PortForwardingHelper options,
9719 related functions, and the port_forwarding tests. These options
9720 were used by the now-deprecated Vidalia to help ordinary users
9721 become Tor relays or bridges. Closes ticket 25409. Patch by
9723 - In order to make the OR and dir checking function in router.c less
9724 confusing we renamed some functions and
9725 consider_testing_reachability() has been split into
9726 router_should_check_reachability() and
9727 router_do_reachability_checks(). Also we improved the documentation
9728 in some functions. Closes ticket 18918.
9729 - Initial work to isolate Libevent usage to a handful of modules in
9730 our codebase, to simplify our call structure, and so that we can
9731 more easily change event loops in the future if needed. Closes
9733 - Introduce a function to call getsockname() and return tor_addr_t,
9734 to save a little complexity throughout the codebase. Closes
9736 - Make hsdir_index in node_t a hsdir_index_t rather than a pointer
9737 as hsdir_index is always present. Also, we move hsdir_index_t into
9738 or.h. Closes ticket 23094. Patch by Neel Chauhan.
9739 - Merge functions used for describing nodes and suppress the
9740 functions that do not allocate memory for the output buffer
9741 string. NODE_DESC_BUF_LEN constant and format_node_description()
9742 function cannot be used externally from router.c module anymore.
9743 Closes ticket 25432. Patch by valentecaio.
9744 - Our main loop has been simplified so that all important operations
9745 happen inside events. Previously, some operations had to happen
9746 outside the event loop, to prevent infinite sequences of event
9747 activations. Closes ticket 25374.
9748 - Put a SHA1 public key digest in hs_service_intro_point_t, and use
9749 it in register_intro_circ() and service_intro_point_new(). This
9750 prevents the digest from being re-calculated each time. Closes
9751 ticket 23107. Patch by Neel Chauhan.
9752 - Refactor token-bucket implementations to use a common backend.
9753 Closes ticket 25766.
9754 - Remove extern declaration of stats_n_seconds_working variable from
9755 main, protecting its accesses with get_uptime() and reset_uptime()
9756 functions. Closes ticket 25081, patch by “valentecaio”.
9757 - Remove our previous logic for "cached gettimeofday()" -- our
9758 coarse monotonic timers are fast enough for this purpose, and far
9759 less error-prone. Implements part of ticket 25927.
9760 - Remove the return value for fascist_firewall_choose_address_base(),
9761 and sister functions such as fascist_firewall_choose_address_node()
9762 and fascist_firewall_choose_address_rs(). Also, while we're here,
9763 initialize the ap argument as leaving it uninitialized can pose a
9764 security hazard. Closes ticket 24734. Patch by Neel Chauhan.
9765 - Rename two fields of connection_t struct. timestamp_lastwritten is
9766 renamed to timestamp_last_write_allowed and timestamp_lastread is
9767 renamed to timestamp_last_read_allowed. Closes ticket 24714, patch
9769 - Since Tor requires C99, remove our old workaround code for libc
9770 implementations where free(NULL) doesn't work. Closes ticket 24484.
9771 - Use our standard rate-limiting code to deal with excessive
9772 libevent failures, rather than the hand-rolled logic we had
9773 before. Closes ticket 26016.
9774 - We remove the return value of node_get_prim_orport() and
9775 node_get_prim_dirport(), and introduce node_get_prim_orport() in
9776 node_ipv6_or_preferred() and node_ipv6_dir_preferred() in order to
9777 check for a null address. Closes ticket 23873. Patch by
9779 - We switch to should_record_bridge_info() in
9780 geoip_note_client_seen() and options_need_geoip_info() instead of
9781 accessing the configuration values directly. Fixes bug 25290;
9782 bugfix on 0.2.1.6-alpha. Patch by Neel Chauhan.
9784 o Deprecated features:
9785 - As we are not recommending 0.2.5 anymore, we require relays that
9786 once had an ed25519 key associated with their RSA key to always
9787 have that key, instead of allowing them to drop back to a version
9788 that didn't support ed25519. This means they need to use a new RSA
9789 key if they want to downgrade to an older version of tor without
9790 ed25519. Closes ticket 20522.
9793 - Correct an IPv6 error in the documentation for ExitPolicy. Closes
9794 ticket 25857. Patch from "CTassisF".
9797 - Directory authorities will no longer support voting according to
9798 any consensus method before consensus method 25. This keeps
9799 authorities compatible with all authorities running 0.2.9.8 and
9800 later, and does not break any clients or relays. Implements ticket
9801 24378 and proposal 290.
9802 - The PortForwarding and PortForwardingHelper features have been
9803 removed. The reasoning is, given that implementations of NAT
9804 traversal protocols within common consumer grade routers are
9805 frequently buggy, and that the target audience for a NAT punching
9806 feature is a perhaps less-technically-inclined relay operator,
9807 when the helper fails to setup traversal the problems are usually
9808 deep, ugly, and very router specific, making them horrendously
9809 impossible for technical support to reliable assist with, and thus
9810 resulting in frustration all around. Unfortunately, relay
9811 operators who would like to run relays behind NATs will need to
9812 become more familiar with the port forwarding configurations on
9813 their local router. Closes 25409.
9814 - The TestingEnableTbEmptyEvent option has been removed. It was used
9815 in testing simulations to measure how often connection buckets
9816 were emptied, in order to improve our scheduling, but it has not
9817 been actively used in years. Closes ticket 25760.
9818 - The old "round-robin" circuit multiplexer (circuitmux)
9819 implementation has been removed, along with a fairly large set of
9820 code that existed to support it. It has not been the default
9821 circuitmux since we introduced the "EWMA" circuitmux in 0.2.4.x,
9822 but it still required an unreasonable amount of memory and CPU.
9823 Closes ticket 25268.
9826 Changes in version 0.3.3.5-rc - 2018-04-15
9827 Tor 0.3.3.5-rc fixes various bugs in earlier versions of Tor,
9828 including some that could affect reliability or correctness.
9830 This is the first release candidate in the 0.3.3 series. If we find no
9831 new bugs or regression here, then the first stable 0.3.3 release will
9832 be nearly identical to this one.
9834 o Major bugfixes (security, protover, voting):
9835 - Revise Rust implementation of protover to use a more memory-
9836 efficient voting algorithm and corresponding data structures, thus
9837 avoiding a potential memory-based DoS attack where specially
9838 crafted protocol strings would expand to fill available memory.
9839 Fixes bug 24031; bugfix on 0.3.3.1-alpha.
9841 o Major bugfixes (performance, load balancing):
9842 - Directory authorities no longer vote in favor of the Guard flag
9843 for relays without directory support. Starting in Tor
9844 0.3.0.1-alpha, clients have been avoiding using such relays in the
9845 Guard position, leading to increasingly broken load balancing for
9846 the 5%-or-so of Guards that don't advertise directory support.
9847 Fixes bug 22310; bugfix on 0.3.0.6.
9849 o Minor feature (continuous integration):
9850 - Update the Travis CI configuration to use the stable Rust channel,
9851 now that we have decided to require that. Closes ticket 25714.
9853 o Minor features (config options):
9854 - Change the way the default value for MaxMemInQueues is calculated.
9855 We now use 40% of the hardware RAM if the system has 8 GB RAM or
9856 more. Otherwise we use the former value of 75%. Closes
9859 o Minor features (geoip):
9860 - Update geoip and geoip6 to the April 3 2018 Maxmind GeoLite2
9861 Country database. Closes ticket 25718.
9863 o Minor bugfixes (client):
9864 - When using a listed relay as a bridge, and also using
9865 microdescriptors, and considering that relay as a non-bridge in a
9866 circuit, treat its microdescriptor as a valid source of
9867 information about that relay. This change should prevent a non-
9868 fatal assertion error. Fixes bug 25691; bugfix on 0.3.3.4-alpha.
9870 o Minor bugfixes (controller):
9871 - Restore the correct operation of the RESOLVE command, which had
9872 been broken since we added the ability to enable/disable DNS on
9873 specific listener ports. Fixes bug 25617; bugfix on 0.2.9.3-alpha.
9875 o Minor bugfixes (distribution, compilation, rust):
9876 - Build correctly when the rust dependencies submodule is loaded,
9877 but the TOR_RUST_DEPENDENCIES environment variable is not set.
9878 Fixes bug 25679; bugfix on 0.3.3.1-alpha.
9879 - Actually include all of our Rust source in our source
9880 distributions. (Previously, a few of the files were accidentally
9881 omitted.) Fixes bug 25732; bugfix on 0.3.3.2-alpha.
9883 o Minor bugfixes (documentation):
9884 - Document that the PerConnBW{Rate,Burst} options will fall back to
9885 their corresponding consensus parameters only if those parameters
9886 are set. Previously we had claimed that these values would always
9887 be set in the consensus. Fixes bug 25296; bugfix on 0.2.2.7-alpha.
9888 - Revert a misformatting issue in the ExitPolicy documentation.
9889 Fixes bug 25582; bugfix on 0.3.3.1-alpha.
9891 o Minor bugfixes (exit relay DNS retries):
9892 - Re-attempt timed-out DNS queries 3 times before failure, since our
9893 timeout is 5 seconds for them, but clients wait 10-15. Also allow
9894 slightly more timeouts per resolver when an exit has multiple
9895 resolvers configured. Fixes bug 21394; bugfix on 0.3.1.9.
9897 o Minor bugfixes (onion services):
9898 - Re-instate counting the client HSDir fetch circuits against the
9899 MaxClientCircuitsPending rate limit. Fixes bug 24989; bugfix
9901 - Remove underscores from the _HSLayer{2,3}Nodes options. This
9902 expert-user configuration can now be enabled as HSLayer{2,3}Nodes.
9903 Fixes bug 25581; bugfix on 0.3.3.1-alpha
9905 o Code simplification and refactoring:
9906 - Move the list of default directory authorities to its own file.
9907 Closes ticket 24854. Patch by "beastr0".
9909 o Documentation (manpage, denial of service):
9910 - Provide more detail about the denial-of-service options, by
9911 listing each mitigation and explaining how they relate. Closes
9915 Changes in version 0.3.3.4-alpha - 2018-03-29
9916 Tor 0.3.3.4-alpha includes various bugfixes for issues found during
9917 the alpha testing of earlier releases in its series. We are
9918 approaching a stable 0.3.3.4-alpha release: more testing is welcome!
9920 o New system requirements:
9921 - When built with Rust, Tor now depends on version 0.2.39 of the
9922 libc crate. Closes tickets 25310 and 25664.
9924 o Major bugfixes (relay, connection):
9925 - If we have failed to connect to a relay and received a connection
9926 refused, timeout, or similar error (at the TCP level), do not try
9927 that same address/port again for 60 seconds after the failure has
9928 occurred. Fixes bug 24767; bugfix on 0.0.6.
9930 o Minor features (geoip):
9931 - Update geoip and geoip6 to the March 8 2018 Maxmind GeoLite2
9932 Country database. Closes ticket 25469.
9934 o Minor features (log messages):
9935 - Improve log message in the out-of-memory handler to include
9936 information about memory usage from the different compression
9937 backends. Closes ticket 25372.
9939 o Minor features (sandbox):
9940 - Explicitly permit the poll() system call when the Linux
9941 seccomp2-based sandbox is enabled: apparently, some versions of
9942 libc use poll() when calling getpwnam(). Closes ticket 25313.
9944 o Minor bugfixes (C correctness):
9945 - Fix a very unlikely (impossible, we believe) null pointer
9946 dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
9947 Coverity; this is CID 1430932.
9949 o Minor bugfixes (channel, client):
9950 - Better identify client connection when reporting to the geoip
9951 client cache. Fixes bug 24904; bugfix on 0.3.1.7.
9953 o Minor bugfixes (compilation):
9954 - Fix a C99 compliance issue in our configuration script that caused
9955 compilation issues when compiling Tor with certain versions of
9956 xtools. Fixes bug 25474; bugfix on 0.3.2.5-alpha.
9958 o Minor bugfixes (controller, reliability):
9959 - Avoid a (nonfatal) assertion failure when extending a one-hop
9960 circuit from the controller to become a multihop circuit. Fixes
9961 bug 24903; bugfix on 0.2.5.2-alpha.
9963 o Major bugfixes (networking):
9964 - Tor will no longer reject IPv6 address strings from Tor Browser
9965 when they are passed as hostnames in SOCKS5 requests. Fixes bug
9966 25036, bugfix on Tor 0.3.1.2.
9968 o Minor bugfixes (networking):
9969 - string_is_valid_hostname() will not consider IP strings to be
9970 valid hostnames. Fixes bug 25055; bugfix on Tor 0.2.5.5.
9972 o Minor bugfixes (onion service v3):
9973 - Avoid an assertion failure when the next onion service
9974 descriptor rotation type is out of sync with the consensus's
9975 valid-after time. Instead, log a warning message with extra
9976 information, so we can better hunt down the cause of this
9977 assertion. Fixes bug 25306; bugfix on 0.3.2.1-alpha.
9979 o Minor bugfixes (testing):
9980 - Avoid intermittent test failures due to a test that had relied on
9981 onion service introduction point creation finishing within 5
9982 seconds of real clock time. Fixes bug 25450; bugfix
9984 - Rust crates are now automatically detected and tested. Previously,
9985 some crates were not tested by `make test-rust` due to a static
9986 string in the `src/test/test_rust.sh` script specifying which
9987 crates to test. Fixes bug 25560; bugfix on 0.3.3.3-alpha.
9989 o Minor bugfixes (testing, benchmarks):
9990 - Fix a crash when running benchmark tests on win32 systems. The
9991 crash was due to a mutex that wasn't initialized before logging
9992 and options were initialized. Fixes bug 25479; bugfix
9995 o Minor bugfixes (warnings, ipv6):
9996 - Avoid a bug warning that could occur when trying to connect to a
9997 relay over IPv6. This warning would occur on a Tor instance that
9998 downloads router descriptors, but prefers to use microdescriptors.
9999 Fixes bug 25213; bugfix on 0.3.3.1-alpha.
10001 o Code simplification and refactoring:
10002 - Remove the old (deterministic) directory retry logic entirely:
10003 We've used exponential backoff exclusively for some time. Closes
10007 - Improved the documentation of AccountingStart parameter. Closes
10009 - Update the documentation for "Log" to include the current list of
10010 logging domains. Closes ticket 25378.
10013 Changes in version 0.3.1.10 - 2018-03-03
10014 Tor 0.3.1.10 backports a number of bugfixes, including important fixes for
10017 It includes an important security fix for a remote crash attack
10018 against directory authorities, tracked as TROVE-2018-001.
10020 This release also backports our new system for improved resistance to
10021 denial-of-service attacks against relays.
10023 This release also fixes several minor bugs and annoyances from
10026 All directory authorities should upgrade to one of the versions
10027 released today. Relays running 0.3.1.x may wish to update to one of
10028 the versions released today, for the DoS mitigations.
10030 Please note: according to our release calendar, Tor 0.3.1 will no
10031 longer be supported after 1 July 2018. If you will be running Tor
10032 after that date, you should make sure to plan to upgrade to the latest
10033 stable version, or downgrade to 0.2.9 (which will receive long-term
10036 o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
10037 - Fix a protocol-list handling bug that could be used to remotely crash
10038 directory authorities with a null-pointer exception. Fixes bug 25074;
10039 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
10042 o Major features (denial-of-service mitigation, backport from 0.3.3.2-alpha):
10043 - Give relays some defenses against the recent network overload. We
10044 start with three defenses (default parameters in parentheses).
10045 First: if a single client address makes too many concurrent
10046 connections (>100), hang up on further connections. Second: if a
10047 single client address makes circuits too quickly (more than 3 per
10048 second, with an allowed burst of 90) while also having too many
10049 connections open (3), refuse new create cells for the next while
10050 (1-2 hours). Third: if a client asks to establish a rendezvous
10051 point to you directly, ignore the request. These defenses can be
10052 manually controlled by new torrc options, but relays will also
10053 take guidance from consensus parameters, so there's no need to
10054 configure anything manually. Implements ticket 24902.
10056 o Minor features (linux seccomp2 sandbox, backport from 0.3.2.5-alpha):
10057 - Update the sandbox rules so that they should now work correctly
10058 with Glibc 2.26. Closes ticket 24315.
10060 o Major bugfixes (onion services, retry behavior, backport from 0.3.3.1-alpha):
10061 - Fix an "off by 2" error in counting rendezvous failures on the
10062 onion service side. While we thought we would stop the rendezvous
10063 attempt after one failed circuit, we were actually making three
10064 circuit attempts before giving up. Now switch to a default of 2,
10065 and allow the consensus parameter "hs_service_max_rdv_failures" to
10066 override. Fixes bug 24895; bugfix on 0.0.6.
10068 o Major bugfixes (protocol versions, backport from 0.3.3.2-alpha):
10069 - Add Link protocol version 5 to the supported protocols list. Fixes
10070 bug 25070; bugfix on 0.3.1.1-alpha.
10072 o Major bugfixes (relay, backport from 0.3.3.1-alpha):
10073 - Fix a set of false positives where relays would consider
10074 connections to other relays as being client-only connections (and
10075 thus e.g. deserving different link padding schemes) if those
10076 relays fell out of the consensus briefly. Now we look only at the
10077 initial handshake and whether the connection authenticated as a
10078 relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
10080 o Minor features (denial-of-service avoidance, backport from 0.3.3.2-alpha):
10081 - Make our OOM handler aware of the geoip client history cache so it
10082 doesn't fill up the memory. This check is important for IPv6 and
10083 our DoS mitigation subsystem. Closes ticket 25122.
10085 o Minor feature (relay statistics, backport from 0.3.2.6-alpha):
10086 - Change relay bandwidth reporting stats interval from 4 hours to 24
10087 hours in order to reduce the efficiency of guard discovery
10088 attacks. Fixes ticket 23856.
10090 o Minor features (compatibility, OpenSSL, backport from 0.3.3.3-alpha):
10091 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
10092 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
10093 since they neither disabled TLS 1.3 nor enabled any of the
10094 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
10095 Closes ticket 24978.
10097 o Minor features (fallback directory mirrors, backport from 0.3.2.9):
10098 - The fallback directory list has been re-generated based on the
10099 current status of the network. Tor uses fallback directories to
10100 bootstrap when it doesn't yet have up-to-date directory
10101 information. Closes ticket 24801.
10102 - Make the default DirAuthorityFallbackRate 0.1, so that clients
10103 prefer to bootstrap from fallback directory mirrors. This is a
10104 follow-up to 24679, which removed weights from the default
10105 fallbacks. Implements ticket 24681.
10107 o Minor features (geoip):
10108 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
10111 o Minor bugfix (channel connection, backport from 0.3.3.2-alpha):
10112 - Use the actual observed address of an incoming relay connection,
10113 not the canonical address of the relay from its descriptor, when
10114 making decisions about how to handle the incoming connection.
10115 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
10117 o Minor bugfix (directory authority, backport from 0.3.3.2-alpha):
10118 - Directory authorities, when refusing a descriptor from a rejected
10119 relay, now explicitly tell the relay (in its logs) to set a valid
10120 ContactInfo address and contact the bad-relays@ mailing list.
10121 Fixes bug 25170; bugfix on 0.2.9.1.
10123 o Minor bugfixes (address selection, backport from 0.3.2.9):
10124 - When the fascist_firewall_choose_address_ functions don't find a
10125 reachable address, set the returned address to the null address
10126 and port. This is a precautionary measure, because some callers do
10127 not check the return value. Fixes bug 24736; bugfix
10130 o Major bugfixes (bootstrapping, backport from 0.3.2.5-alpha):
10131 - Fetch descriptors aggressively whenever we lack enough to build
10132 circuits, regardless of how many descriptors we are missing.
10133 Previously, we would delay launching the fetch when we had fewer
10134 than 15 missing descriptors, even if some of those descriptors
10135 were blocking circuits from building. Fixes bug 23985; bugfix on
10136 0.1.1.11-alpha. The effects of this bug became worse in
10137 0.3.0.3-alpha, when we began treating missing descriptors from our
10138 primary guards as a reason to delay circuits.
10139 - Don't try fetching microdescriptors from relays that have failed
10140 to deliver them in the past. Fixes bug 23817; bugfix
10143 o Minor bugfixes (compilation, backport from 0.3.2.7-rc):
10144 - Fix a signed/unsigned comparison warning introduced by our fix to
10145 TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
10147 o Minor bugfixes (control port, linux seccomp2 sandbox, backport from 0.3.2.5-alpha):
10148 - Avoid a crash when attempting to use the seccomp2 sandbox together
10149 with the OwningControllerProcess feature. Fixes bug 24198; bugfix
10152 o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
10153 - Fix a possible crash on malformed consensus. If a consensus had
10154 contained an unparseable protocol line, it could have made clients
10155 and relays crash with a null-pointer exception. To exploit this
10156 issue, however, an attacker would need to be able to subvert the
10157 directory authority system. Fixes bug 25251; bugfix on
10158 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
10160 o Minor bugfixes (directory cache, backport from 0.3.2.5-alpha):
10161 - Recover better from empty or corrupt files in the consensus cache
10162 directory. Fixes bug 24099; bugfix on 0.3.1.1-alpha.
10163 - When a consensus diff calculation is only partially successful,
10164 only record the successful parts as having succeeded. Partial
10165 success can happen if (for example) one compression method fails
10166 but the others succeed. Previously we misrecorded all the
10167 calculations as having succeeded, which would later cause a
10168 nonfatal assertion failure. Fixes bug 24086; bugfix
10171 o Minor bugfixes (entry guards, backport from 0.3.2.3-alpha):
10172 - Tor now updates its guard state when it reads a consensus
10173 regardless of whether it's missing descriptors. That makes tor use
10174 its primary guards to fetch descriptors in some edge cases where
10175 it would previously have used fallback directories. Fixes bug
10176 23862; bugfix on 0.3.0.1-alpha.
10178 o Minor bugfixes (logging, backport from 0.3.3.2-alpha):
10179 - Don't treat inability to store a cached consensus object as a bug:
10180 it can happen normally when we are out of disk space. Fixes bug
10181 24859; bugfix on 0.3.1.1-alpha.
10183 o Minor bugfixes (memory usage, backport from 0.3.2.8-rc):
10184 - When queuing DESTROY cells on a channel, only queue the circuit-id
10185 and reason fields: not the entire 514-byte cell. This fix should
10186 help mitigate any bugs or attacks that fill up these queues, and
10187 free more RAM for other uses. Fixes bug 24666; bugfix
10190 o Minor bugfixes (network layer, backport from 0.3.2.5-alpha):
10191 - When closing a connection via close_connection_immediately(), we
10192 mark it as "not blocked on bandwidth", to prevent later calls from
10193 trying to unblock it, and give it permission to read. This fixes a
10194 backtrace warning that can happen on relays under various
10195 circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
10197 o Minor bugfixes (path selection, backport from 0.3.2.4-alpha):
10198 - When selecting relays by bandwidth, avoid a rounding error that
10199 could sometimes cause load to be imbalanced incorrectly.
10200 Previously, we would always round upwards; now, we round towards
10201 the nearest integer. This had the biggest effect when a relay's
10202 weight adjustments should have given it weight 0, but it got
10203 weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
10204 - When calculating the fraction of nodes that have descriptors, and
10205 all nodes in the network have zero bandwidths, count the number of
10206 nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
10207 - Actually log the total bandwidth in compute_weighted_bandwidths().
10208 Fixes bug 24170; bugfix on 0.2.4.3-alpha.
10210 o Minor bugfixes (performance, fragile-hardening, backport from 0.3.3.1-alpha):
10211 - Improve the performance of our consensus-diff application code
10212 when Tor is built with the --enable-fragile-hardening option set.
10213 Fixes bug 24826; bugfix on 0.3.1.1-alpha.
10215 o Minor bugfixes (OSX, backport from 0.3.3.1-alpha):
10216 - Don't exit the Tor process if setrlimit() fails to change the file
10217 limit (which can happen sometimes on some versions of OSX). Fixes
10218 bug 21074; bugfix on 0.0.9pre5.
10220 o Minor bugfixes (portability, msvc, backport from 0.3.2.9):
10221 - Fix a bug in the bit-counting parts of our timing-wheel code on
10222 MSVC. (Note that MSVC is still not a supported build platform, due
10223 to cyptographic timing channel risks.) Fixes bug 24633; bugfix
10226 o Minor bugfixes (relay, partial backport):
10227 - Make the internal channel_is_client() function look at what sort
10228 of connection handshake the other side used, rather than whether
10229 the other side ever sent a create_fast cell to us. Backports part
10230 of the fixes from bugs 22805 and 24898.
10232 o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
10233 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
10235 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
10236 bugfix on 0.2.9.4-alpha.
10238 o Code simplification and refactoring (backport from 0.3.3.3-alpha):
10239 - Update the "rust dependencies" submodule to be a project-level
10240 repository, rather than a user repository. Closes ticket 25323.
10243 Changes in version 0.2.9.15 - 2018-03-03
10244 Tor 0.2.9.15 backports important security and stability bugfixes from
10245 later Tor releases.
10247 It includes an important security fix for a remote crash attack
10248 against directory authorities, tracked as TROVE-2018-001.
10250 This release also backports our new system for improved resistance to
10251 denial-of-service attacks against relays.
10253 This release also fixes several minor bugs and annoyances from
10256 All directory authorities should upgrade to one of the versions
10257 released today. Relays running 0.2.9.x may wish to update to one of
10258 the versions released today, for the DoS mitigations.
10260 o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
10261 - Fix a protocol-list handling bug that could be used to remotely crash
10262 directory authorities with a null-pointer exception. Fixes bug 25074;
10263 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
10266 o Major features (denial-of-service mitigation):
10267 - Give relays some defenses against the recent network overload. We
10268 start with three defenses (default parameters in parentheses).
10269 First: if a single client address makes too many concurrent
10270 connections (>100), hang up on further connections. Second: if a
10271 single client address makes circuits too quickly (more than 3 per
10272 second, with an allowed burst of 90) while also having too many
10273 connections open (3), refuse new create cells for the next while
10274 (1-2 hours). Third: if a client asks to establish a rendezvous
10275 point to you directly, ignore the request. These defenses can be
10276 manually controlled by new torrc options, but relays will also
10277 take guidance from consensus parameters, so there's no need to
10278 configure anything manually. Implements ticket 24902.
10280 o Major bugfixes (bootstrapping):
10281 - Fetch descriptors aggressively whenever we lack enough to build
10282 circuits, regardless of how many descriptors we are missing.
10283 Previously, we would delay launching the fetch when we had fewer
10284 than 15 missing descriptors, even if some of those descriptors
10285 were blocking circuits from building. Fixes bug 23985; bugfix on
10286 0.1.1.11-alpha. The effects of this bug became worse in
10287 0.3.0.3-alpha, when we began treating missing descriptors from our
10288 primary guards as a reason to delay circuits.
10290 o Major bugfixes (onion services, retry behavior):
10291 - Fix an "off by 2" error in counting rendezvous failures on the
10292 onion service side. While we thought we would stop the rendezvous
10293 attempt after one failed circuit, we were actually making three
10294 circuit attempts before giving up. Now switch to a default of 2,
10295 and allow the consensus parameter "hs_service_max_rdv_failures" to
10296 override. Fixes bug 24895; bugfix on 0.0.6.
10298 o Minor feature (relay statistics):
10299 - Change relay bandwidth reporting stats interval from 4 hours to 24
10300 hours in order to reduce the efficiency of guard discovery
10301 attacks. Fixes ticket 23856.
10303 o Minor features (compatibility, OpenSSL):
10304 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
10305 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
10306 since they neither disabled TLS 1.3 nor enabled any of the
10307 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
10308 Closes ticket 24978.
10310 o Minor features (denial-of-service avoidance):
10311 - Make our OOM handler aware of the geoip client history cache so it
10312 doesn't fill up the memory. This check is important for IPv6 and
10313 our DoS mitigation subsystem. Closes ticket 25122.
10315 o Minor features (fallback directory mirrors):
10316 - The fallback directory list has been re-generated based on the
10317 current status of the network. Tor uses fallback directories to
10318 bootstrap when it doesn't yet have up-to-date directory
10319 information. Closes ticket 24801.
10320 - Make the default DirAuthorityFallbackRate 0.1, so that clients
10321 prefer to bootstrap from fallback directory mirrors. This is a
10322 follow-up to 24679, which removed weights from the default
10323 fallbacks. Implements ticket 24681.
10325 o Minor features (geoip):
10326 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
10329 o Minor features (linux seccomp2 sandbox):
10330 - Update the sandbox rules so that they should now work correctly
10331 with Glibc 2.26. Closes ticket 24315.
10333 o Minor bugfix (channel connection):
10334 - Use the actual observed address of an incoming relay connection,
10335 not the canonical address of the relay from its descriptor, when
10336 making decisions about how to handle the incoming connection.
10337 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
10339 o Minor bugfix (directory authority):
10340 - Directory authorities, when refusing a descriptor from a rejected
10341 relay, now explicitly tell the relay (in its logs) to set a valid
10342 ContactInfo address and contact the bad-relays@ mailing list.
10343 Fixes bug 25170; bugfix on 0.2.9.1.
10345 o Minor bugfixes (address selection):
10346 - When the fascist_firewall_choose_address_ functions don't find a
10347 reachable address, set the returned address to the null address
10348 and port. This is a precautionary measure, because some callers do
10349 not check the return value. Fixes bug 24736; bugfix
10352 o Minor bugfixes (compilation):
10353 - Fix a signed/unsigned comparison warning introduced by our fix to
10354 TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
10356 o Minor bugfixes (control port, linux seccomp2 sandbox):
10357 - Avoid a crash when attempting to use the seccomp2 sandbox together
10358 with the OwningControllerProcess feature. Fixes bug 24198; bugfix
10361 o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
10362 - Fix a possible crash on malformed consensus. If a consensus had
10363 contained an unparseable protocol line, it could have made clients
10364 and relays crash with a null-pointer exception. To exploit this
10365 issue, however, an attacker would need to be able to subvert the
10366 directory authority system. Fixes bug 25251; bugfix on
10367 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
10369 o Minor bugfixes (memory usage):
10370 - When queuing DESTROY cells on a channel, only queue the circuit-id
10371 and reason fields: not the entire 514-byte cell. This fix should
10372 help mitigate any bugs or attacks that fill up these queues, and
10373 free more RAM for other uses. Fixes bug 24666; bugfix
10376 o Minor bugfixes (network layer):
10377 - When closing a connection via close_connection_immediately(), we
10378 mark it as "not blocked on bandwidth", to prevent later calls from
10379 trying to unblock it, and give it permission to read. This fixes a
10380 backtrace warning that can happen on relays under various
10381 circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
10383 o Minor bugfixes (OSX):
10384 - Don't exit the Tor process if setrlimit() fails to change the file
10385 limit (which can happen sometimes on some versions of OSX). Fixes
10386 bug 21074; bugfix on 0.0.9pre5.
10388 o Minor bugfixes (path selection):
10389 - When selecting relays by bandwidth, avoid a rounding error that
10390 could sometimes cause load to be imbalanced incorrectly.
10391 Previously, we would always round upwards; now, we round towards
10392 the nearest integer. This had the biggest effect when a relay's
10393 weight adjustments should have given it weight 0, but it got
10394 weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
10395 - When calculating the fraction of nodes that have descriptors, and
10396 all nodes in the network have zero bandwidths, count the number of
10397 nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
10398 - Actually log the total bandwidth in compute_weighted_bandwidths().
10399 Fixes bug 24170; bugfix on 0.2.4.3-alpha.
10401 o Minor bugfixes (portability, msvc):
10402 - Fix a bug in the bit-counting parts of our timing-wheel code on
10403 MSVC. (Note that MSVC is still not a supported build platform, due
10404 to cryptographic timing channel risks.) Fixes bug 24633; bugfix
10407 o Minor bugfixes (relay):
10408 - Make the internal channel_is_client() function look at what sort
10409 of connection handshake the other side used, rather than whether
10410 the other side ever sent a create_fast cell to us. Backports part
10411 of the fixes from bugs 22805 and 24898.
10413 o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
10414 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
10416 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
10417 bugfix on 0.2.9.4-alpha.
10420 Changes in version 0.3.2.10 - 2018-03-03
10421 Tor 0.3.2.10 is the second stable release in the 0.3.2 series. It
10422 backports a number of bugfixes, including important fixes for security
10425 It includes an important security fix for a remote crash attack
10426 against directory authorities, tracked as TROVE-2018-001.
10428 Additionally, it backports a fix for a bug whose severity we have
10429 upgraded: Bug 24700, which was fixed in 0.3.3.2-alpha, can be remotely
10430 triggered in order to crash relays with a use-after-free pattern. As
10431 such, we are now tracking that bug as TROVE-2018-002 and
10432 CVE-2018-0491, and backporting it to earlier releases. This bug
10433 affected versions 0.3.2.1-alpha through 0.3.2.9, as well as version
10436 This release also backports our new system for improved resistance to
10437 denial-of-service attacks against relays.
10439 This release also fixes several minor bugs and annoyances from
10442 Relays running 0.3.2.x SHOULD upgrade to one of the versions released
10443 today, for the fix to TROVE-2018-002. Directory authorities should
10444 also upgrade. (Relays on earlier versions might want to update too for
10445 the DoS mitigations.)
10447 o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
10448 - Fix a protocol-list handling bug that could be used to remotely crash
10449 directory authorities with a null-pointer exception. Fixes bug 25074;
10450 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
10453 o Major bugfixes (scheduler, KIST, denial-of-service, backport from 0.3.3.2-alpha):
10454 - Avoid adding the same channel twice in the KIST scheduler pending
10455 list, which could lead to remote denial-of-service use-after-free
10456 attacks against relays. Fixes bug 24700; bugfix on 0.3.2.1-alpha.
10458 o Major features (denial-of-service mitigation, backport from 0.3.3.2-alpha):
10459 - Give relays some defenses against the recent network overload. We
10460 start with three defenses (default parameters in parentheses).
10461 First: if a single client address makes too many concurrent
10462 connections (>100), hang up on further connections. Second: if a
10463 single client address makes circuits too quickly (more than 3 per
10464 second, with an allowed burst of 90) while also having too many
10465 connections open (3), refuse new create cells for the next while
10466 (1-2 hours). Third: if a client asks to establish a rendezvous
10467 point to you directly, ignore the request. These defenses can be
10468 manually controlled by new torrc options, but relays will also
10469 take guidance from consensus parameters, so there's no need to
10470 configure anything manually. Implements ticket 24902.
10472 o Major bugfixes (onion services, retry behavior, backport from 0.3.3.1-alpha):
10473 - Fix an "off by 2" error in counting rendezvous failures on the
10474 onion service side. While we thought we would stop the rendezvous
10475 attempt after one failed circuit, we were actually making three
10476 circuit attempts before giving up. Now switch to a default of 2,
10477 and allow the consensus parameter "hs_service_max_rdv_failures" to
10478 override. Fixes bug 24895; bugfix on 0.0.6.
10479 - New-style (v3) onion services now obey the "max rendezvous circuit
10480 attempts" logic. Previously they would make as many rendezvous
10481 circuit attempts as they could fit in the MAX_REND_TIMEOUT second
10482 window before giving up. Fixes bug 24894; bugfix on 0.3.2.1-alpha.
10484 o Major bugfixes (protocol versions, backport from 0.3.3.2-alpha):
10485 - Add Link protocol version 5 to the supported protocols list. Fixes
10486 bug 25070; bugfix on 0.3.1.1-alpha.
10488 o Major bugfixes (relay, backport from 0.3.3.1-alpha):
10489 - Fix a set of false positives where relays would consider
10490 connections to other relays as being client-only connections (and
10491 thus e.g. deserving different link padding schemes) if those
10492 relays fell out of the consensus briefly. Now we look only at the
10493 initial handshake and whether the connection authenticated as a
10494 relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
10496 o Major bugfixes (scheduler, consensus, backport from 0.3.3.2-alpha):
10497 - The scheduler subsystem was failing to promptly notice changes in
10498 consensus parameters, making it harder to switch schedulers
10499 network-wide. Fixes bug 24975; bugfix on 0.3.2.1-alpha.
10501 o Minor features (denial-of-service avoidance, backport from 0.3.3.2-alpha):
10502 - Make our OOM handler aware of the geoip client history cache so it
10503 doesn't fill up the memory. This check is important for IPv6 and
10504 our DoS mitigation subsystem. Closes ticket 25122.
10506 o Minor features (compatibility, OpenSSL, backport from 0.3.3.3-alpha):
10507 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
10508 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
10509 since they neither disabled TLS 1.3 nor enabled any of the
10510 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
10511 Closes ticket 24978.
10513 o Minor features (geoip):
10514 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
10517 o Minor features (logging, diagnostic, backport from 0.3.3.2-alpha):
10518 - When logging a failure to create an onion service's descriptor,
10519 also log what the problem with the descriptor was. Diagnostic
10522 o Minor bugfix (channel connection, backport from 0.3.3.2-alpha):
10523 - Use the actual observed address of an incoming relay connection,
10524 not the canonical address of the relay from its descriptor, when
10525 making decisions about how to handle the incoming connection.
10526 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
10528 o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
10529 - Fix a possible crash on malformed consensus. If a consensus had
10530 contained an unparseable protocol line, it could have made clients
10531 and relays crash with a null-pointer exception. To exploit this
10532 issue, however, an attacker would need to be able to subvert the
10533 directory authority system. Fixes bug 25251; bugfix on
10534 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
10536 o Minor bugfix (directory authority, backport from 0.3.3.2-alpha):
10537 - Directory authorities, when refusing a descriptor from a rejected
10538 relay, now explicitly tell the relay (in its logs) to set a valid
10539 ContactInfo address and contact the bad-relays@ mailing list.
10540 Fixes bug 25170; bugfix on 0.2.9.1.
10542 o Minor bugfixes (build, rust, backport from 0.3.3.1-alpha):
10543 - When building with Rust on OSX, link against libresolv, to work
10544 around the issue at https://github.com/rust-lang/rust/issues/46797.
10545 Fixes bug 24652; bugfix on 0.3.1.1-alpha.
10547 o Minor bugfixes (onion services, backport from 0.3.3.2-alpha):
10548 - Remove a BUG() statement when a client fetches an onion descriptor
10549 that has a lower revision counter than the one in its cache. This
10550 can happen in normal circumstances due to HSDir desync. Fixes bug
10551 24976; bugfix on 0.3.2.1-alpha.
10553 o Minor bugfixes (logging, backport from 0.3.3.2-alpha):
10554 - Don't treat inability to store a cached consensus object as a bug:
10555 it can happen normally when we are out of disk space. Fixes bug
10556 24859; bugfix on 0.3.1.1-alpha.
10558 o Minor bugfixes (performance, fragile-hardening, backport from 0.3.3.1-alpha):
10559 - Improve the performance of our consensus-diff application code
10560 when Tor is built with the --enable-fragile-hardening option set.
10561 Fixes bug 24826; bugfix on 0.3.1.1-alpha.
10563 o Minor bugfixes (OSX, backport from 0.3.3.1-alpha):
10564 - Don't exit the Tor process if setrlimit() fails to change the file
10565 limit (which can happen sometimes on some versions of OSX). Fixes
10566 bug 21074; bugfix on 0.0.9pre5.
10568 o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
10569 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
10571 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
10572 bugfix on 0.2.9.4-alpha.
10574 o Minor bugfixes (testing, backport from 0.3.3.1-alpha):
10575 - Fix a memory leak in the scheduler/loop_kist unit test. Fixes bug
10576 25005; bugfix on 0.3.2.7-rc.
10578 o Minor bugfixes (v3 onion services, backport from 0.3.3.2-alpha):
10579 - Look at the "HSRend" protocol version, not the "HSDir" protocol
10580 version, when deciding whether a consensus entry can support the
10581 v3 onion service protocol as a rendezvous point. Fixes bug 25105;
10582 bugfix on 0.3.2.1-alpha.
10584 o Code simplification and refactoring (backport from 0.3.3.3-alpha):
10585 - Update the "rust dependencies" submodule to be a project-level
10586 repository, rather than a user repository. Closes ticket 25323.
10588 o Documentation (backport from 0.3.3.1-alpha)
10589 - Document that operators who run more than one relay or bridge are
10590 expected to set MyFamily and ContactInfo correctly. Closes
10594 Changes in version 0.3.3.3-alpha - 2018-03-03
10595 Tor 0.3.3.3-alpha is the third alpha release for the 0.3.3.x series.
10596 It includes an important security fix for a remote crash attack
10597 against directory authorities tracked as TROVE-2018-001.
10599 Additionally, with this release, we are upgrading the severity of a
10600 bug fixed in 0.3.3.2-alpha. Bug 24700, which was fixed in
10601 0.3.3.2-alpha, can be remotely triggered in order to crash relays with
10602 a use-after-free pattern. As such, we are now tracking that bug as
10603 TROVE-2018-002 and CVE-2018-0491. This bug affected versions
10604 0.3.2.1-alpha through 0.3.2.9, as well as 0.3.3.1-alpha.
10606 This release also fixes several minor bugs and annoyances from
10609 Relays running 0.3.2.x should upgrade to one of the versions released
10610 today, for the fix to TROVE-2018-002. Directory authorities should
10611 also upgrade. (Relays on earlier versions might want to update too for
10612 the DoS mitigations.)
10614 o Major bugfixes (denial-of-service, directory authority):
10615 - Fix a protocol-list handling bug that could be used to remotely crash
10616 directory authorities with a null-pointer exception. Fixes bug 25074;
10617 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
10620 o Minor features (compatibility, OpenSSL):
10621 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
10622 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
10623 since they neither disabled TLS 1.3 nor enabled any of the
10624 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
10625 Closes ticket 24978.
10627 o Minor features (logging):
10628 - Clarify the log messages produced when getrandom() or a related
10629 entropy-generation mechanism gives an error. Closes ticket 25120.
10631 o Minor features (testing):
10632 - Add a "make test-rust" target to run the rust tests only. Closes
10635 o Minor bugfixes (denial-of-service):
10636 - Fix a possible crash on malformed consensus. If a consensus had
10637 contained an unparseable protocol line, it could have made clients
10638 and relays crash with a null-pointer exception. To exploit this
10639 issue, however, an attacker would need to be able to subvert the
10640 directory authority system. Fixes bug 25251; bugfix on
10641 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
10643 o Minor bugfixes (DoS mitigation):
10644 - Add extra safety checks when refilling the circuit creation bucket
10645 to ensure we never set a value above the allowed maximum burst.
10646 Fixes bug 25202; bugfix on 0.3.3.2-alpha.
10647 - When a new consensus arrives, don't update our DoS-mitigation
10648 parameters if we aren't a public relay. Fixes bug 25223; bugfix
10651 o Minor bugfixes (man page, SocksPort):
10652 - Remove dead code from the old "SocksSocket" option, and rename
10653 SocksSocketsGroupWritable to UnixSocksGroupWritable. The old option
10654 still works, but is deprecated. Fixes bug 24343; bugfix on 0.2.6.3.
10656 o Minor bugfixes (performance):
10657 - Reduce the number of circuits that will be opened at once during
10658 the circuit build timeout phase. This is done by increasing the
10659 idle timeout to 3 minutes, and lowering the maximum number of
10660 concurrent learning circuits to 10. Fixes bug 24769; bugfix
10663 o Minor bugfixes (spec conformance):
10664 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
10666 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
10667 bugfix on 0.2.9.4-alpha.
10669 o Minor bugfixes (spec conformance, rust):
10670 - Resolve a denial-of-service issue caused by an infinite loop in
10671 the rust protover code. Fixes bug 25250, bugfix on 0.3.3.1-alpha.
10672 Also tracked as TROVE-2018-003.
10674 o Code simplification and refactoring:
10675 - Update the "rust dependencies" submodule to be a project-level
10676 repository, rather than a user repository. Closes ticket 25323.
10679 Changes in version 0.3.3.2-alpha - 2018-02-10
10680 Tor 0.3.3.2-alpha is the second alpha in the 0.3.3.x series. It
10681 introduces a mechanism to handle the high loads that many relay
10682 operators have been reporting recently. It also fixes several bugs in
10683 older releases. If this new code proves reliable, we plan to backport
10684 it to older supported release series.
10686 o Major features (denial-of-service mitigation):
10687 - Give relays some defenses against the recent network overload. We
10688 start with three defenses (default parameters in parentheses).
10689 First: if a single client address makes too many concurrent
10690 connections (>100), hang up on further connections. Second: if a
10691 single client address makes circuits too quickly (more than 3 per
10692 second, with an allowed burst of 90) while also having too many
10693 connections open (3), refuse new create cells for the next while
10694 (1-2 hours). Third: if a client asks to establish a rendezvous
10695 point to you directly, ignore the request. These defenses can be
10696 manually controlled by new torrc options, but relays will also
10697 take guidance from consensus parameters, so there's no need to
10698 configure anything manually. Implements ticket 24902.
10700 o Major bugfixes (netflow padding):
10701 - Stop adding unneeded channel padding right after we finish
10702 flushing to a connection that has been trying to flush for many
10703 seconds. Instead, treat all partial or complete flushes as
10704 activity on the channel, which will defer the time until we need
10705 to add padding. This fix should resolve confusing and scary log
10706 messages like "Channel padding timeout scheduled 221453ms in the
10707 past." Fixes bug 22212; bugfix on 0.3.1.1-alpha.
10709 o Major bugfixes (protocol versions):
10710 - Add Link protocol version 5 to the supported protocols list. Fixes
10711 bug 25070; bugfix on 0.3.1.1-alpha.
10713 o Major bugfixes (scheduler, consensus):
10714 - The scheduler subsystem was failing to promptly notice changes in
10715 consensus parameters, making it harder to switch schedulers
10716 network-wide. Fixes bug 24975; bugfix on 0.3.2.1-alpha.
10718 o Minor features (denial-of-service avoidance):
10719 - Make our OOM handler aware of the geoip client history cache so it
10720 doesn't fill up the memory. This check is important for IPv6 and
10721 our DoS mitigation subsystem. Closes ticket 25122.
10723 o Minor features (directory authority):
10724 - When directory authorities are unable to add signatures to a
10725 pending consensus, log the reason why. Closes ticket 24849.
10727 o Minor features (geoip):
10728 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
10731 o Minor features (logging, diagnostic):
10732 - When logging a failure to create an onion service's descriptor,
10733 also log what the problem with the descriptor was. Diagnostic for
10736 o Minor bugfix (channel connection):
10737 - Use the actual observed address of an incoming relay connection,
10738 not the canonical address of the relay from its descriptor, when
10739 making decisions about how to handle the incoming connection.
10740 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
10742 o Minor bugfix (directory authority):
10743 - Directory authorities, when refusing a descriptor from a rejected
10744 relay, now explicitly tell the relay (in its logs) to set a valid
10745 ContactInfo address and contact the bad-relays@ mailing list.
10746 Fixes bug 25170; bugfix on 0.2.9.1.
10748 o Minor bugfixes (all versions of Tor):
10749 - Use the "misspell" tool to detect and fix typos throughout the
10750 source code. Fixes bug 23650; bugfix on various versions of Tor.
10751 Patch from Deepesh Pathak.
10753 o Minor bugfixes (circuit, cannibalization):
10754 - Don't cannibalize preemptively-built circuits if we no longer
10755 recognize their first hop. This situation can happen if our Guard
10756 relay went off the consensus after the circuit was created. Fixes
10757 bug 24469; bugfix on 0.0.6.
10759 o Minor bugfixes (correctness):
10760 - Remove a nonworking, unnecessary check to see whether a circuit
10761 hop's identity digest was set when the circuit failed. Fixes bug
10762 24927; bugfix on 0.2.4.4-alpha.
10764 o Minor bugfixes (logging):
10765 - Don't treat inability to store a cached consensus object as a bug:
10766 it can happen normally when we are out of disk space. Fixes bug
10767 24859; bugfix on 0.3.1.1-alpha.
10768 - Fix a (mostly harmless) race condition when invoking
10769 LOG_PROTOCOL_WARN message from a subthread while the torrc options
10770 are changing. Fixes bug 23954; bugfix on 0.1.1.9-alpha.
10772 o Minor bugfixes (onion services):
10773 - Remove a BUG() statement when a client fetches an onion descriptor
10774 that has a lower revision counter than the one in its cache. This
10775 can happen in normal circumstances due to HSDir desync. Fixes bug
10776 24976; bugfix on 0.3.2.1-alpha.
10777 - If we are configured to offer a single onion service, don't log
10778 long-term established one hop rendezvous points in the heartbeat.
10779 Fixes bug 25116; bugfix on 0.2.9.6-rc.
10781 o Minor bugfixes (performance):
10782 - Avoid calling protocol_list_supports_protocol() from inside tight
10783 loops when running with cached routerinfo_t objects. Instead,
10784 summarize the relevant protocols as flags in the routerinfo_t, as
10785 we do for routerstatus_t objects. This change simplifies our code
10786 a little, and saves a large amount of short-term memory allocation
10787 operations. Fixes bug 25008; bugfix on 0.2.9.4-alpha.
10789 o Minor bugfixes (Rust FFI):
10790 - Fix a minor memory leak which would happen whenever the C code
10791 would call the Rust implementation of
10792 protover_get_supported_protocols(). This was due to the C version
10793 returning a static string, whereas the Rust version newly allocated
10794 a CString to pass across the FFI boundary. Consequently, the C
10795 code was not expecting to need to free() what it was given. Fixes
10796 bug 25127; bugfix on 0.3.2.1-alpha.
10798 o Minor bugfixes (scheduler, KIST):
10799 - Avoid adding the same channel twice in the KIST scheduler pending
10800 list, which would waste CPU cycles. Fixes bug 24700; bugfix
10803 o Minor bugfixes (unit test, monotonic time):
10804 - Increase a constant (1msec to 10msec) in the monotonic time test
10805 that makes sure the nsec/usec/msec times read are synchronized.
10806 This change was needed to accommodate slow systems like armel or
10807 when the clock_gettime() is not a VDSO on the running kernel.
10808 Fixes bug 25113; bugfix on 0.2.9.1.
10810 o Minor bugfixes (v3 onion services):
10811 - Look at the "HSRend" protocol version, not the "HSDir" protocol
10812 version, when deciding whether a consensus entry can support the
10813 v3 onion service protocol as a rendezvous point. Fixes bug 25105;
10814 bugfix on 0.3.2.1-alpha.
10816 o Code simplification and refactoring:
10817 - Remove the unused nodelist_recompute_all_hsdir_indices(). Closes
10819 - Remove a series of counters used to track circuit extend attempts
10820 and connection status but that in reality we aren't using for
10821 anything other than stats logged by a SIGUSR1 signal. Closes
10824 o Documentation (man page):
10825 - The HiddenServiceVersion torrc option accepts only one number:
10826 either version 2 or 3. Closes ticket 25026; bugfix
10830 Changes in version 0.3.3.1-alpha - 2018-01-25
10831 Tor 0.3.3.1-alpha is the first release in the 0.3.3.x series. It adds
10832 several new features to Tor, including several improvements to
10833 bootstrapping, and support for an experimental "vanguards" feature to
10834 resist guard discovery attacks. This series also includes better
10835 support for applications that need to embed Tor or manage v3
10838 o Major features (embedding):
10839 - There is now a documented stable API for programs that need to
10840 embed Tor. See tor_api.h for full documentation and known bugs.
10841 Closes ticket 23684.
10842 - Tor now has support for restarting in the same process.
10843 Controllers that run Tor using the "tor_api.h" interface can now
10844 restart Tor after Tor has exited. This support is incomplete,
10845 however: we fixed crash bugs that prevented it from working at
10846 all, but many bugs probably remain, including a possibility of
10847 security issues. Implements ticket 24581.
10849 o Major features (IPv6, directory documents):
10850 - Add consensus method 27, which adds IPv6 ORPorts to the microdesc
10851 consensus. This information makes it easier for IPv6 clients to
10852 bootstrap and choose reachable entry guards. Implements ticket 23826.
10853 - Add consensus method 28, which removes IPv6 ORPorts from
10854 microdescriptors. Now that the consensus contains IPv6 ORPorts, they
10855 are redundant in microdescs. This change will be used by Tor clients
10856 on 0.2.8.x and later. (That is to say, with all Tor clients that
10857 have IPv6 bootstrap and guard support.) Implements ticket 23828.
10858 - Expand the documentation for AuthDirHasIPv6Connectivity when it is
10859 set by different numbers of authorities. Fixes 23870
10862 o Major features (onion service v3, control port):
10863 - The control port now supports commands and events for v3 onion
10864 services. It is now possible to create ephemeral v3 services using
10865 ADD_ONION. Additionally, several events (HS_DESC, HS_DESC_CONTENT,
10866 CIRC and CIRC_MINOR) and commands (GETINFO, HSPOST, ADD_ONION and
10867 DEL_ONION) have been extended to support v3 onion services. Closes
10868 ticket 20699; implements proposal 284.
10870 o Major features (onion services):
10871 - Provide torrc options to pin the second and third hops of onion
10872 service circuits to a list of nodes. The option HSLayer2Guards
10873 pins the second hop, and the option HSLayer3Guards pins the third
10874 hop. These options are for use in conjunction with experiments
10875 with "vanguards" for preventing guard enumeration attacks. Closes
10878 o Major features (rust, portability, experimental):
10879 - Tor now ships with an optional implementation of one of its
10880 smaller modules (protover.c) in the Rust programming language. To
10881 try it out, install a Rust build environment, and configure Tor
10882 with "--enable-rust --enable-cargo-online-mode". This should not
10883 cause any user-visible changes, but should help us gain more
10884 experience with Rust, and plan future Rust integration work.
10885 Implementation by Chelsea Komlo. Closes ticket 22840.
10887 o Minor features (storage, configuration):
10888 - Users can store cached directory documents somewhere other than
10889 the DataDirectory by using the CacheDirectory option. Similarly,
10890 the storage location for relay's keys can be overridden with the
10891 KeyDirectory option. Closes ticket 22703.
10893 o Major features (v3 onion services, ipv6):
10894 - When v3 onion service clients send introduce cells, they now
10895 include the IPv6 address of the rendezvous point, if it has one.
10896 Current v3 onion services running 0.3.2 ignore IPv6 addresses, but
10897 in future Tor versions, IPv6-only v3 single onion services will be
10898 able to use IPv6 addresses to connect directly to the rendezvous
10899 point. Closes ticket 23577. Patch by Neel Chauhan.
10901 o Major bugfixes (onion services, retry behavior):
10902 - Fix an "off by 2" error in counting rendezvous failures on the
10903 onion service side. While we thought we would stop the rendezvous
10904 attempt after one failed circuit, we were actually making three
10905 circuit attempts before giving up. Now switch to a default of 2,
10906 and allow the consensus parameter "hs_service_max_rdv_failures" to
10907 override. Fixes bug 24895; bugfix on 0.0.6.
10908 - New-style (v3) onion services now obey the "max rendezvous circuit
10909 attempts" logic. Previously they would make as many rendezvous
10910 circuit attempts as they could fit in the MAX_REND_TIMEOUT second
10911 window before giving up. Fixes bug 24894; bugfix on 0.3.2.1-alpha.
10913 o Major bugfixes (relays):
10914 - Fix a set of false positives where relays would consider
10915 connections to other relays as being client-only connections (and
10916 thus e.g. deserving different link padding schemes) if those
10917 relays fell out of the consensus briefly. Now we look only at the
10918 initial handshake and whether the connection authenticated as a
10919 relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
10921 o Minor feature (IPv6):
10922 - Make IPv6-only clients wait for microdescs for relays, even if we
10923 were previously using descriptors (or were using them as a bridge)
10924 and have a cached descriptor for them. Implements ticket 23827.
10925 - When a consensus has IPv6 ORPorts, make IPv6-only clients use
10926 them, rather than waiting to download microdescriptors.
10927 Implements ticket 23827.
10929 o Minor features (cleanup):
10930 - Tor now deletes the CookieAuthFile and ExtORPortCookieAuthFile
10931 when it stops. Closes ticket 23271.
10933 o Minor features (defensive programming):
10934 - Most of the functions in Tor that free objects have been replaced
10935 with macros that free the objects and set the corresponding
10936 pointers to NULL. This change should help prevent a large class of
10937 dangling pointer bugs. Closes ticket 24337.
10938 - Where possible, the tor_free() macro now only evaluates its input
10939 once. Part of ticket 24337.
10940 - Check that microdesc ed25519 ids are non-zero in
10941 node_get_ed25519_id() before returning them. Implements ticket
10942 24001, patch by "aruna1234".
10944 o Minor features (embedding):
10945 - Tor can now start with a preauthenticated control connection
10946 created by the process that launched it. This feature is meant for
10947 use by programs that want to launch and manage a Tor process
10948 without allowing other programs to manage it as well. For more
10949 information, see the __OwningControllerFD option documented in
10950 control-spec.txt. Closes ticket 23900.
10951 - On most errors that would cause Tor to exit, it now tries to
10952 return from the tor_main() function, rather than calling the
10953 system exit() function. Most users won't notice a difference here,
10954 but it should be significant for programs that run Tor inside
10955 a separate thread: they should now be able to survive Tor's exit
10956 conditions rather than having Tor shut down the entire process.
10957 Closes ticket 23848.
10958 - Applications that want to embed Tor can now tell Tor not to
10959 register any of its own POSIX signal handlers, using the
10960 __DisableSignalHandlers option. Closes ticket 24588.
10962 o Minor features (fallback directory list):
10963 - Avoid selecting fallbacks that change their IP addresses too
10964 often. Select more fallbacks by ignoring the Guard flag, and
10965 allowing lower cutoffs for the Running and V2Dir flags. Also allow
10966 a lower bandwidth, and a higher number of fallbacks per operator
10967 (5% of the list). Implements ticket 24785.
10968 - Update the fallback whitelist and blacklist based on opt-ins and
10969 relay changes. Closes tickets 22321, 24678, 22527, 24135,
10972 o Minor features (fallback directory mirror configuration):
10973 - Add a nickname to each fallback in a C comment. This makes it
10974 easier for operators to find their relays, and allows stem to use
10975 nicknames to identify fallbacks. Implements ticket 24600.
10976 - Add a type and version header to the fallback directory mirror
10977 file. Also add a delimiter to the end of each fallback entry. This
10978 helps external parsers like stem and Relay Search. Implements
10980 - Add an extrainfo cache flag for each fallback in a C comment. This
10981 allows stem to use fallbacks to fetch extra-info documents, rather
10982 than using authorities. Implements ticket 22759.
10983 - Add the generateFallbackDirLine.py script for automatically
10984 generating fallback directory mirror lines from relay fingerprints.
10985 No more typos! Add the lookupFallbackDirContact.py script for
10986 automatically looking up operator contact info from relay
10987 fingerprints. Implements ticket 24706, patch by teor and atagar.
10988 - Reject any fallback directory mirror that serves an expired
10989 consensus. Implements ticket 20942, patch by "minik".
10990 - Remove commas and equals signs from external string inputs to the
10991 fallback list. This avoids format confusion attacks. Implements
10993 - Remove the "weight=10" line from fallback directory mirror
10994 entries. Ticket 24681 will maintain the current fallback weights
10995 by changing Tor's default fallback weight to 10. Implements
10997 - Stop logging excessive information about fallback netblocks.
10998 Implements ticket 24791.
11000 o Minor features (forward-compatibility):
11001 - If a relay supports some link authentication protocol that we do
11002 not recognize, then include that relay's ed25519 key when telling
11003 other relays to extend to it. Previously, we treated future
11004 versions as if they were too old to support ed25519 link
11005 authentication. Closes ticket 20895.
11007 o Minor features (heartbeat):
11008 - Add onion service information to our heartbeat logs, displaying
11009 stats about the activity of configured onion services. Closes
11012 o Minor features (instrumentation, development):
11013 - Add the MainloopStats option to allow developers to get
11014 instrumentation information from the main event loop via the
11015 heartbeat messages. We hope to use this to improve Tor's behavior
11016 when it's trying to sleep. Closes ticket 24605.
11018 o Minor features (log messages):
11019 - Improve a warning message that happens when we fail to re-parse an
11020 old router because of an expired certificate. Closes ticket 20020.
11021 - Make the log more quantitative when we hit MaxMemInQueues
11022 threshold exposing some values. Closes ticket 24501.
11024 o Minor features (logging, android):
11025 - Added support for the Android logging subsystem. Closes
11028 o Minor features (performance):
11029 - Support predictive circuit building for onion service circuits
11030 with multiple layers of guards. Closes ticket 23101.
11031 - Use stdatomic.h where available, rather than mutexes, to implement
11032 atomic_counter_t. Closes ticket 23953.
11034 o Minor features (performance, 32-bit):
11035 - Improve performance on 32-bit systems by avoiding 64-bit division
11036 when calculating the timestamp in milliseconds for channel padding
11037 computations. Implements ticket 24613.
11038 - Improve performance on 32-bit systems by avoiding 64-bit division
11039 when timestamping cells and buffer chunks for OOM calculations.
11040 Implements ticket 24374.
11042 o Minor features (performance, OSX, iOS):
11043 - Use the mach_approximate_time() function (when available) to
11044 implement coarse monotonic time. Having a coarse time function
11045 should avoid a large number of system calls, and improve
11046 performance slightly, especially under load. Closes ticket 24427.
11048 o Minor features (performance, windows):
11049 - Improve performance on Windows Vista and Windows 7 by adjusting
11050 TCP send window size according to the recommendation from
11051 SIO_IDEAL_SEND_BACKLOG_QUERY. Closes ticket 22798. Patch
11054 o Major features (relay):
11055 - Implement an option, ReducedExitPolicy, to allow an Tor exit relay
11056 operator to use a more reasonable ("reduced") exit policy, rather
11057 than the default one. If you want to run an exit node without
11058 thinking too hard about which ports to allow, this one is for you.
11059 Closes ticket 13605. Patch from Neel Chauhan.
11061 o Minor features (testing, debugging, embedding):
11062 - For development purposes, Tor now has a mode in which it runs for
11063 a few seconds, then stops, and starts again without exiting the
11064 process. This mode is meant to help us debug various issues with
11065 ticket 23847. To use this feature, compile with
11066 --enable-restart-debugging, and set the TOR_DEBUG_RESTART
11067 environment variable. This is expected to crash a lot, and is
11068 really meant for developers only. It will likely be removed in a
11069 future release. Implements ticket 24583.
11071 o Minor bugfix (network IPv6 test):
11072 - Tor's test scripts now check if "ping -6 ::1" works when the user
11073 runs "make test-network-all". Fixes bug 24677; bugfix on
11074 0.2.9.3-alpha. Patch by "ffmancera".
11076 o Minor bugfixes (build, rust):
11077 - Fix output of autoconf checks to display success messages for Rust
11078 dependencies and a suitable rustc compiler version. Fixes bug
11079 24612; bugfix on 0.3.1.3-alpha.
11080 - When building with Rust on OSX, link against libresolv, to work
11081 around the issue at https://github.com/rust-lang/rust/issues/46797.
11082 Fixes bug 24652; bugfix on 0.3.1.1-alpha.
11083 - Don't pass the --quiet option to cargo: it seems to suppress some
11084 errors, which is not what we want to do when building. Fixes bug
11085 24518; bugfix on 0.3.1.7.
11086 - Build correctly when building from outside Tor's source tree with
11087 the TOR_RUST_DEPENDENCIES option set. Fixes bug 22768; bugfix
11090 o Minor bugfixes (directory authorities, IPv6):
11091 - When creating a routerstatus (vote) from a routerinfo (descriptor),
11092 set the IPv6 address to the unspecified IPv6 address, and
11093 explicitly initialize the port to zero. Fixes bug 24488; bugfix
11096 o Minor bugfixes (fallback directory mirrors):
11097 - Make updateFallbackDirs.py search harder for python. (Some OSs
11098 don't put it in /usr/bin.) Fixes bug 24708; bugfix
11101 o Minor bugfixes (hibernation, bandwidth accounting, shutdown):
11102 - When hibernating, close connections normally and allow them to
11103 flush. Fixes bug 23571; bugfix on 0.2.4.7-alpha. Also fixes
11105 - Do not attempt to launch self-reachability tests when entering
11106 hibernation. Fixes a case of bug 12062; bugfix on 0.0.9pre5.
11107 - Resolve several bugs related to descriptor fetching on bridge
11108 clients with bandwidth accounting enabled. (This combination is
11109 not recommended!) Fixes a case of bug 12062; bugfix
11111 - When hibernating, do not attempt to launch DNS checks. Fixes a
11112 case of bug 12062; bugfix on 0.1.2.2-alpha.
11113 - When hibernating, do not try to upload or download descriptors.
11114 Fixes a case of bug 12062; bugfix on 0.0.9pre5.
11116 o Minor bugfixes (IPv6, bridges):
11117 - Tor now always sets IPv6 preferences for bridges. Fixes bug 24573;
11118 bugfix on 0.2.8.2-alpha.
11119 - Tor now sets IPv6 address in the routerstatus as well as in the
11120 router descriptors when updating addresses for a bridge. Closes
11121 ticket 24572; bugfix on 0.2.4.5-alpha. Patch by "ffmancera".
11123 o Minor bugfixes (linux seccomp2 sandbox):
11124 - When running with the sandbox enabled, reload configuration files
11125 correctly even when %include was used. Previously we would crash.
11126 Fixes bug 22605; bugfix on 0.3.1. Patch from Daniel Pinto.
11128 o Minor bugfixes (memory leaks):
11129 - Avoid possible at-exit memory leaks related to use of Libevent's
11130 event_base_once() function. (This function tends to leak memory if
11131 the event_base is closed before the event fires.) Fixes bug 24584;
11132 bugfix on 0.2.8.1-alpha.
11133 - Fix a harmless memory leak in tor-resolve. Fixes bug 24582; bugfix
11136 o Minor bugfixes (OSX):
11137 - Don't exit the Tor process if setrlimit() fails to change the file
11138 limit (which can happen sometimes on some versions of OSX). Fixes
11139 bug 21074; bugfix on 0.0.9pre5.
11141 o Minor bugfixes (performance, fragile-hardening):
11142 - Improve the performance of our consensus-diff application code
11143 when Tor is built with the --enable-fragile-hardening option set.
11144 Fixes bug 24826; bugfix on 0.3.1.1-alpha.
11146 o Minor bugfixes (performance, timeouts):
11147 - Consider circuits for timeout as soon as they complete a hop. This
11148 is more accurate than applying the timeout in
11149 circuit_expire_building() because that function is only called
11150 once per second, which is now too slow for typical timeouts on the
11151 current network. Fixes bug 23114; bugfix on 0.2.2.2-alpha.
11152 - Use onion service circuits (and other circuits longer than 3 hops)
11153 to calculate a circuit build timeout. Previously, Tor only
11154 calculated its build timeout based on circuits that planned to be
11155 exactly 3 hops long. With this change, we include measurements
11156 from all circuits at the point where they complete their third
11157 hop. Fixes bug 23100; bugfix on 0.2.2.2-alpha.
11159 o Minor bugfixes (testing):
11160 - Give out Exit flags in bootstrapping networks. Fixes bug 24137;
11161 bugfix on 0.2.3.1-alpha.
11162 - Fix a memory leak in the scheduler/loop_kist unit test. Fixes bug
11163 25005; bugfix on 0.3.2.7-rc.
11165 o Code simplification and refactoring:
11166 - Remove /usr/athena from search path in configure.ac. Closes
11168 - Remove duplicate code in node_has_curve25519_onion_key() and
11169 node_get_curve25519_onion_key(), and add a check for a zero
11170 microdesc curve25519 onion key. Closes ticket 23966, patch by
11171 "aruna1234" and teor.
11172 - Rewrite channel_rsa_id_group_set_badness to reduce temporary
11173 memory allocations with large numbers of OR connections (e.g.
11174 relays). Closes ticket 24119.
11175 - Separate the function that deletes ephemeral files when Tor
11177 - Small changes to Tor's buf_t API to make it suitable for use as a
11178 general-purpose safe string constructor. Closes ticket 22342.
11179 - Switch -Wnormalized=id to -Wnormalized=nfkc in configure.ac to
11180 avoid source code identifier confusion. Closes ticket 24467.
11181 - The tor_git_revision[] constant no longer needs to be redeclared
11182 by everything that links against the rest of Tor. Done as part of
11183 ticket 23845, to simplify our external API.
11184 - We make extend_info_from_node() use node_get_curve25519_onion_key()
11185 introduced in ticket 23577 to access the curve25519 public keys
11186 rather than accessing it directly. Closes ticket 23760. Patch by
11188 - Add a function to log channels' scheduler state changes to aid
11189 debugging efforts. Closes ticket 24531.
11192 - Add documentation on how to build tor with Rust dependencies
11193 without having to be online. Closes ticket 22907; bugfix
11195 - Clarify the behavior of RelayBandwidth{Rate,Burst} with client
11196 traffic. Closes ticket 24318.
11197 - Document that OutboundBindAddress doesn't apply to DNS requests.
11198 Closes ticket 22145. Patch from Aruna Maurya.
11199 - Document that operators who run more than one relay or bridge are
11200 expected to set MyFamily and ContactInfo correctly. Closes
11203 o Code simplification and refactoring (channels):
11204 - Remove the incoming and outgoing channel queues. These were never
11205 used, but still took up a step in our fast path.
11206 - The majority of the channel unit tests have been rewritten and the
11207 code coverage has now been raised to 83.6% for channel.c. Closes
11209 - Remove other dead code from the channel subsystem: All together,
11210 this cleanup has removed more than 1500 lines of code overall and
11211 adding very little except for unit test.
11213 o Code simplification and refactoring (circuit rendezvous):
11214 - Split the client-side rendezvous circuit lookup into two
11215 functions: one that returns only established circuits and another
11216 that returns all kinds of circuits. Closes ticket 23459.
11218 o Code simplification and refactoring (controller):
11219 - Make most of the variables in networkstatus_getinfo_by_purpose()
11220 const. Implements ticket 24489.
11223 Changes in version 0.3.2.9 - 2018-01-09
11224 Tor 0.3.2.9 is the first stable release in the 0.3.2 series.
11226 The 0.3.2 series includes our long-anticipated new onion service
11227 design, with numerous security features. (For more information, see
11228 our blog post at https://blog.torproject.org/fall-harvest.) We also
11229 have a new circuit scheduler algorithm for improved performance on
11230 relays everywhere (see https://blog.torproject.org/kist-and-tell),
11231 along with many smaller features and bugfixes.
11233 Per our stable release policy, we plan to support each stable release
11234 series for at least the next nine months, or for three months after
11235 the first stable release of the next series: whichever is longer. If
11236 you need a release with long-term support, we recommend that you stay
11237 with the 0.2.9 series.
11239 Below is a list of the changes since 0.3.2.8-rc. For a list of all
11240 changes since 0.3.1, see the ReleaseNotes file.
11242 o Minor features (fallback directory mirrors):
11243 - The fallback directory list has been re-generated based on the
11244 current status of the network. Tor uses fallback directories to
11245 bootstrap when it doesn't yet have up-to-date directory
11246 information. Closes ticket 24801.
11247 - Make the default DirAuthorityFallbackRate 0.1, so that clients
11248 prefer to bootstrap from fallback directory mirrors. This is a
11249 follow-up to 24679, which removed weights from the default
11250 fallbacks. Implements ticket 24681.
11252 o Minor features (geoip):
11253 - Update geoip and geoip6 to the January 5 2018 Maxmind GeoLite2
11256 o Minor bugfixes (address selection):
11257 - When the fascist_firewall_choose_address_ functions don't find a
11258 reachable address, set the returned address to the null address
11259 and port. This is a precautionary measure, because some callers do
11260 not check the return value. Fixes bug 24736; bugfix
11263 o Minor bugfixes (compilation):
11264 - Resolve a few shadowed-variable warnings in the onion service
11265 code. Fixes bug 24634; bugfix on 0.3.2.1-alpha.
11267 o Minor bugfixes (portability, msvc):
11268 - Fix a bug in the bit-counting parts of our timing-wheel code on
11269 MSVC. (Note that MSVC is still not a supported build platform, due
11270 to cryptographic timing channel risks.) Fixes bug 24633; bugfix
11274 Changes in version 0.3.2.8-rc - 2017-12-21
11275 Tor 0.3.2.8-rc fixes a pair of bugs in the KIST and KISTLite
11276 schedulers that had led servers under heavy load to overload their
11277 outgoing connections. All relay operators running earlier 0.3.2.x
11278 versions should upgrade. This version also includes a mitigation for
11279 over-full DESTROY queues leading to out-of-memory conditions: if it
11280 works, we will soon backport it to earlier release series.
11282 This is the second release candidate in the 0.3.2 series. If we find
11283 no new bugs or regression here, then the first stable 0.3.2 release
11284 will be nearly identical to this.
11286 o Major bugfixes (KIST, scheduler):
11287 - The KIST scheduler did not correctly account for data already
11288 enqueued in each connection's send socket buffer, particularly in
11289 cases when the TCP/IP congestion window was reduced between
11290 scheduler calls. This situation lead to excessive per-connection
11291 buffering in the kernel, and a potential memory DoS. Fixes bug
11292 24665; bugfix on 0.3.2.1-alpha.
11294 o Minor features (geoip):
11295 - Update geoip and geoip6 to the December 6 2017 Maxmind GeoLite2
11298 o Minor bugfixes (hidden service v3):
11299 - Bump hsdir_spread_store parameter from 3 to 4 in order to increase
11300 the probability of reaching a service for a client missing
11301 microdescriptors. Fixes bug 24425; bugfix on 0.3.2.1-alpha.
11303 o Minor bugfixes (memory usage):
11304 - When queuing DESTROY cells on a channel, only queue the circuit-id
11305 and reason fields: not the entire 514-byte cell. This fix should
11306 help mitigate any bugs or attacks that fill up these queues, and
11307 free more RAM for other uses. Fixes bug 24666; bugfix
11310 o Minor bugfixes (scheduler, KIST):
11311 - Use a sane write limit for KISTLite when writing onto a connection
11312 buffer instead of using INT_MAX and shoving as much as it can.
11313 Because the OOM handler cleans up circuit queues, we are better
11314 off at keeping them in that queue instead of the connection's
11315 buffer. Fixes bug 24671; bugfix on 0.3.2.1-alpha.
11318 Changes in version 0.3.2.7-rc - 2017-12-14
11319 Tor 0.3.2.7-rc fixes various bugs in earlier versions of Tor,
11320 including some that could affect reliability or correctness.
11322 This is the first release candidate in the 0.3.2 series. If we find no
11323 new bugs or regression here, then the first stable 0.3.2. release will
11324 be nearly identical to this.
11326 o Major bugfixes (circuit prediction):
11327 - Fix circuit prediction logic so that a client doesn't treat a port
11328 as being "handled" by a circuit if that circuit already has
11329 isolation settings on it. This change should make Tor clients more
11330 responsive by improving their chances of having a pre-created
11331 circuit ready for use when a request arrives. Fixes bug 18859;
11332 bugfix on 0.2.3.3-alpha.
11334 o Minor features (logging):
11335 - Provide better warnings when the getrandom() syscall fails. Closes
11338 o Minor features (portability):
11339 - Tor now compiles correctly on arm64 with libseccomp-dev installed.
11340 (It doesn't yet work with the sandbox enabled.) Closes
11343 o Minor bugfixes (bridge clients, bootstrap):
11344 - Retry directory downloads when we get our first bridge descriptor
11345 during bootstrap or while reconnecting to the network. Keep
11346 retrying every time we get a bridge descriptor, until we have a
11347 reachable bridge. Fixes part of bug 24367; bugfix on 0.2.0.3-alpha.
11348 - Stop delaying bridge descriptor fetches when we have cached bridge
11349 descriptors. Instead, only delay bridge descriptor fetches when we
11350 have at least one reachable bridge. Fixes part of bug 24367;
11351 bugfix on 0.2.0.3-alpha.
11352 - Stop delaying directory fetches when we have cached bridge
11353 descriptors. Instead, only delay bridge descriptor fetches when
11354 all our bridges are definitely unreachable. Fixes part of bug
11355 24367; bugfix on 0.2.0.3-alpha.
11357 o Minor bugfixes (compilation):
11358 - Fix a signed/unsigned comparison warning introduced by our fix to
11359 TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
11361 o Minor bugfixes (correctness):
11362 - Fix several places in our codebase where a C compiler would be
11363 likely to eliminate a check, based on assuming that undefined
11364 behavior had not happened elsewhere in the code. These cases are
11365 usually a sign of redundant checking or dubious arithmetic. Found
11366 by Georg Koppen using the "STACK" tool from Wang, Zeldovich,
11367 Kaashoek, and Solar-Lezama. Fixes bug 24423; bugfix on various
11370 o Minor bugfixes (onion service v3):
11371 - Fix a race where an onion service would launch a new intro circuit
11372 after closing an old one, but fail to register it before freeing
11373 the previously closed circuit. This bug was making the service
11374 unable to find the established intro circuit and thus not upload
11375 its descriptor, thus making a service unavailable for up to 24
11376 hours. Fixes bug 23603; bugfix on 0.3.2.1-alpha.
11378 o Minor bugfixes (scheduler, KIST):
11379 - Properly set the scheduler state of an unopened channel in the
11380 KIST scheduler main loop. This prevents a harmless but annoying
11381 log warning. Fixes bug 24502; bugfix on 0.3.2.4-alpha.
11382 - Avoid a possible integer overflow when computing the available
11383 space on the TCP buffer of a channel. This had no security
11384 implications; but could make KIST allow too many cells on a
11385 saturated connection. Fixes bug 24590; bugfix on 0.3.2.1-alpha.
11386 - Downgrade to "info" a harmless warning about the monotonic time
11387 moving backwards: This can happen on platform not supporting
11388 monotonic time. Fixes bug 23696; bugfix on 0.3.2.1-alpha.
11391 Changes in version 0.3.2.6-alpha - 2017-12-01
11392 This version of Tor is the latest in the 0.3.2 alpha series. It
11393 includes fixes for several important security issues. All Tor users
11394 should upgrade to this release, or to one of the other releases coming
11397 o Major bugfixes (security):
11398 - Fix a denial of service bug where an attacker could use a
11399 malformed directory object to cause a Tor instance to pause while
11400 OpenSSL would try to read a passphrase from the terminal. (Tor
11401 instances run without a terminal, which is the case for most Tor
11402 packages, are not impacted.) Fixes bug 24246; bugfix on every
11403 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
11404 Found by OSS-Fuzz as testcase 6360145429790720.
11405 - Fix a denial of service issue where an attacker could crash a
11406 directory authority using a malformed router descriptor. Fixes bug
11407 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
11409 - When checking for replays in the INTRODUCE1 cell data for a
11410 (legacy) onion service, correctly detect replays in the RSA-
11411 encrypted part of the cell. We were previously checking for
11412 replays on the entire cell, but those can be circumvented due to
11413 the malleability of Tor's legacy hybrid encryption. This fix helps
11414 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
11415 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
11418 o Major bugfixes (security, onion service v2):
11419 - Fix a use-after-free error that could crash v2 Tor onion services
11420 when they failed to open circuits while expiring introduction
11421 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
11422 also tracked as TROVE-2017-013 and CVE-2017-8823.
11424 o Major bugfixes (security, relay):
11425 - When running as a relay, make sure that we never build a path
11426 through ourselves, even in the case where we have somehow lost the
11427 version of our descriptor appearing in the consensus. Fixes part
11428 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
11429 as TROVE-2017-012 and CVE-2017-8822.
11430 - When running as a relay, make sure that we never choose ourselves
11431 as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
11432 issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
11434 o Minor feature (relay statistics):
11435 - Change relay bandwidth reporting stats interval from 4 hours to 24
11436 hours in order to reduce the efficiency of guard discovery
11437 attacks. Fixes ticket 23856.
11439 o Minor features (directory authority):
11440 - Add an IPv6 address for the "bastet" directory authority. Closes
11443 o Minor bugfixes (client):
11444 - By default, do not enable storage of client-side DNS values. These
11445 values were unused by default previously, but they should not have
11446 been cached at all. Fixes bug 24050; bugfix on 0.2.6.3-alpha.
11449 Changes in version 0.3.1.9 - 2017-12-01:
11450 Tor 0.3.1.9 backports important security and stability fixes from the
11451 0.3.2 development series. All Tor users should upgrade to this
11452 release, or to another of the releases coming out today.
11454 o Major bugfixes (security, backport from 0.3.2.6-alpha):
11455 - Fix a denial of service bug where an attacker could use a
11456 malformed directory object to cause a Tor instance to pause while
11457 OpenSSL would try to read a passphrase from the terminal. (Tor
11458 instances run without a terminal, which is the case for most Tor
11459 packages, are not impacted.) Fixes bug 24246; bugfix on every
11460 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
11461 Found by OSS-Fuzz as testcase 6360145429790720.
11462 - Fix a denial of service issue where an attacker could crash a
11463 directory authority using a malformed router descriptor. Fixes bug
11464 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
11466 - When checking for replays in the INTRODUCE1 cell data for a
11467 (legacy) onion service, correctly detect replays in the RSA-
11468 encrypted part of the cell. We were previously checking for
11469 replays on the entire cell, but those can be circumvented due to
11470 the malleability of Tor's legacy hybrid encryption. This fix helps
11471 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
11472 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
11475 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
11476 - Fix a use-after-free error that could crash v2 Tor onion services
11477 when they failed to open circuits while expiring introduction
11478 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
11479 also tracked as TROVE-2017-013 and CVE-2017-8823.
11481 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
11482 - When running as a relay, make sure that we never build a path
11483 through ourselves, even in the case where we have somehow lost the
11484 version of our descriptor appearing in the consensus. Fixes part
11485 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
11486 as TROVE-2017-012 and CVE-2017-8822.
11487 - When running as a relay, make sure that we never choose ourselves
11488 as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
11489 issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
11491 o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
11492 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
11493 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
11494 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
11495 identifying and finding a workaround to this bug and to Moritz,
11496 Arthur Edelstein, and Roger for helping to track it down and
11499 o Minor features (bridge):
11500 - Bridges now include notice in their descriptors that they are
11501 bridges, and notice of their distribution status, based on their
11502 publication settings. Implements ticket 18329. For more fine-
11503 grained control of how a bridge is distributed, upgrade to 0.3.2.x
11506 o Minor features (directory authority, backport from 0.3.2.6-alpha):
11507 - Add an IPv6 address for the "bastet" directory authority. Closes
11510 o Minor features (geoip):
11511 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
11514 o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
11515 - Avoid unnecessary calls to directory_fetches_from_authorities() on
11516 relays, to prevent spurious address resolutions and descriptor
11517 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
11518 bugfix on in 0.2.8.1-alpha.
11520 o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
11521 - Fix unused variable warnings in donna's Curve25519 SSE2 code.
11522 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
11524 o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
11525 - When a circuit is marked for close, do not attempt to package any
11526 cells for channels on that circuit. Previously, we would detect
11527 this condition lower in the call stack, when we noticed that the
11528 circuit had no attached channel, and log an annoying message.
11529 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
11531 o Minor bugfixes (onion service, backport from 0.3.2.5-alpha):
11532 - Rename the consensus parameter "hsdir-interval" to "hsdir_interval"
11533 so it matches dir-spec.txt. Fixes bug 24262; bugfix
11536 o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
11537 - Avoid a crash when transitioning from client mode to bridge mode.
11538 Previously, we would launch the worker threads whenever our
11539 "public server" mode changed, but not when our "server" mode
11540 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
11543 Changes in version 0.3.0.13 - 2017-12-01
11544 Tor 0.3.0.13 backports important security and stability bugfixes from
11545 later Tor releases. All Tor users should upgrade to this release, or
11546 to another of the releases coming out today.
11548 Note: the Tor 0.3.0 series will no longer be supported after 26 Jan
11549 2018. If you need a release with long-term support, please stick with
11550 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
11552 o Major bugfixes (security, backport from 0.3.2.6-alpha):
11553 - Fix a denial of service bug where an attacker could use a
11554 malformed directory object to cause a Tor instance to pause while
11555 OpenSSL would try to read a passphrase from the terminal. (Tor
11556 instances run without a terminal, which is the case for most Tor
11557 packages, are not impacted.) Fixes bug 24246; bugfix on every
11558 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
11559 Found by OSS-Fuzz as testcase 6360145429790720.
11560 - Fix a denial of service issue where an attacker could crash a
11561 directory authority using a malformed router descriptor. Fixes bug
11562 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
11564 - When checking for replays in the INTRODUCE1 cell data for a
11565 (legacy) onion service, correctly detect replays in the RSA-
11566 encrypted part of the cell. We were previously checking for
11567 replays on the entire cell, but those can be circumvented due to
11568 the malleability of Tor's legacy hybrid encryption. This fix helps
11569 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
11570 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
11573 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
11574 - Fix a use-after-free error that could crash v2 Tor onion services
11575 when they failed to open circuits while expiring introduction
11576 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
11577 also tracked as TROVE-2017-013 and CVE-2017-8823.
11579 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
11580 - When running as a relay, make sure that we never build a path
11581 through ourselves, even in the case where we have somehow lost the
11582 version of our descriptor appearing in the consensus. Fixes part
11583 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
11584 as TROVE-2017-012 and CVE-2017-8822.
11585 - When running as a relay, make sure that we never choose ourselves
11586 as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
11587 issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
11589 o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
11590 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
11591 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
11592 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
11593 identifying and finding a workaround to this bug and to Moritz,
11594 Arthur Edelstein, and Roger for helping to track it down and
11597 o Minor features (security, windows, backport from 0.3.1.1-alpha):
11598 - Enable a couple of pieces of Windows hardening: one
11599 (HeapEnableTerminationOnCorruption) that has been on-by-default
11600 since Windows 8, and unavailable before Windows 7; and one
11601 (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
11602 affect us, but shouldn't do any harm. Closes ticket 21953.
11604 o Minor features (bridge, backport from 0.3.1.9):
11605 - Bridges now include notice in their descriptors that they are
11606 bridges, and notice of their distribution status, based on their
11607 publication settings. Implements ticket 18329. For more fine-
11608 grained control of how a bridge is distributed, upgrade to 0.3.2.x
11611 o Minor features (directory authority, backport from 0.3.2.6-alpha):
11612 - Add an IPv6 address for the "bastet" directory authority. Closes
11615 o Minor features (geoip):
11616 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
11619 o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
11620 - Avoid unnecessary calls to directory_fetches_from_authorities() on
11621 relays, to prevent spurious address resolutions and descriptor
11622 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
11623 bugfix on in 0.2.8.1-alpha.
11625 o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
11626 - Fix unused variable warnings in donna's Curve25519 SSE2 code.
11627 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
11629 o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
11630 - When a circuit is marked for close, do not attempt to package any
11631 cells for channels on that circuit. Previously, we would detect
11632 this condition lower in the call stack, when we noticed that the
11633 circuit had no attached channel, and log an annoying message.
11634 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
11636 o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
11637 - Avoid a crash when transitioning from client mode to bridge mode.
11638 Previously, we would launch the worker threads whenever our
11639 "public server" mode changed, but not when our "server" mode
11640 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
11642 o Minor bugfixes (testing, backport from 0.3.1.6-rc):
11643 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
11644 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
11647 Changes in version 0.2.9.14 - 2017-12-01
11648 Tor 0.3.0.13 backports important security and stability bugfixes from
11649 later Tor releases. All Tor users should upgrade to this release, or
11650 to another of the releases coming out today.
11652 o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
11653 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
11654 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
11655 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
11656 identifying and finding a workaround to this bug and to Moritz,
11657 Arthur Edelstein, and Roger for helping to track it down and
11660 o Major bugfixes (security, backport from 0.3.2.6-alpha):
11661 - Fix a denial of service bug where an attacker could use a
11662 malformed directory object to cause a Tor instance to pause while
11663 OpenSSL would try to read a passphrase from the terminal. (Tor
11664 instances run without a terminal, which is the case for most Tor
11665 packages, are not impacted.) Fixes bug 24246; bugfix on every
11666 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
11667 Found by OSS-Fuzz as testcase 6360145429790720.
11668 - Fix a denial of service issue where an attacker could crash a
11669 directory authority using a malformed router descriptor. Fixes bug
11670 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
11672 - When checking for replays in the INTRODUCE1 cell data for a
11673 (legacy) onion service, correctly detect replays in the RSA-
11674 encrypted part of the cell. We were previously checking for
11675 replays on the entire cell, but those can be circumvented due to
11676 the malleability of Tor's legacy hybrid encryption. This fix helps
11677 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
11678 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
11681 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
11682 - Fix a use-after-free error that could crash v2 Tor onion services
11683 when they failed to open circuits while expiring introduction
11684 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
11685 also tracked as TROVE-2017-013 and CVE-2017-8823.
11687 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
11688 - When running as a relay, make sure that we never build a path
11689 through ourselves, even in the case where we have somehow lost the
11690 version of our descriptor appearing in the consensus. Fixes part
11691 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
11692 as TROVE-2017-012 and CVE-2017-8822.
11694 o Minor features (bridge, backport from 0.3.1.9):
11695 - Bridges now include notice in their descriptors that they are
11696 bridges, and notice of their distribution status, based on their
11697 publication settings. Implements ticket 18329. For more fine-
11698 grained control of how a bridge is distributed, upgrade to 0.3.2.x
11701 o Minor features (directory authority, backport from 0.3.2.6-alpha):
11702 - Add an IPv6 address for the "bastet" directory authority. Closes
11705 o Minor features (geoip):
11706 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
11709 o Minor features (security, windows, backport from 0.3.1.1-alpha):
11710 - Enable a couple of pieces of Windows hardening: one
11711 (HeapEnableTerminationOnCorruption) that has been on-by-default
11712 since Windows 8, and unavailable before Windows 7; and one
11713 (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
11714 affect us, but shouldn't do any harm. Closes ticket 21953.
11716 o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
11717 - Avoid unnecessary calls to directory_fetches_from_authorities() on
11718 relays, to prevent spurious address resolutions and descriptor
11719 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
11720 bugfix on in 0.2.8.1-alpha.
11722 o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
11723 - Fix unused variable warnings in donna's Curve25519 SSE2 code.
11724 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
11726 o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
11727 - When a circuit is marked for close, do not attempt to package any
11728 cells for channels on that circuit. Previously, we would detect
11729 this condition lower in the call stack, when we noticed that the
11730 circuit had no attached channel, and log an annoying message.
11731 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
11733 o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
11734 - Avoid a crash when transitioning from client mode to bridge mode.
11735 Previously, we would launch the worker threads whenever our
11736 "public server" mode changed, but not when our "server" mode
11737 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
11739 o Minor bugfixes (testing, backport from 0.3.1.6-rc):
11740 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
11741 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
11744 Changes in version 0.2.8.17 - 2017-12-01
11745 Tor 0.2.8.17 backports important security and stability bugfixes from
11746 later Tor releases. All Tor users should upgrade to this release, or
11747 to another of the releases coming out today.
11749 Note: the Tor 0.2.8 series will no longer be supported after 1 Jan
11750 2018. If you need a release with long-term support, please upgrade with
11751 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
11753 o Major bugfixes (security, backport from 0.3.2.6-alpha):
11754 - Fix a denial of service bug where an attacker could use a
11755 malformed directory object to cause a Tor instance to pause while
11756 OpenSSL would try to read a passphrase from the terminal. (Tor
11757 instances run without a terminal, which is the case for most Tor
11758 packages, are not impacted.) Fixes bug 24246; bugfix on every
11759 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
11760 Found by OSS-Fuzz as testcase 6360145429790720.
11761 - When checking for replays in the INTRODUCE1 cell data for a
11762 (legacy) onion service, correctly detect replays in the RSA-
11763 encrypted part of the cell. We were previously checking for
11764 replays on the entire cell, but those can be circumvented due to
11765 the malleability of Tor's legacy hybrid encryption. This fix helps
11766 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
11767 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
11770 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
11771 - Fix a use-after-free error that could crash v2 Tor onion services
11772 when they failed to open circuits while expiring introduction
11773 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
11774 also tracked as TROVE-2017-013 and CVE-2017-8823.
11776 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
11777 - When running as a relay, make sure that we never build a path through
11778 ourselves, even in the case where we have somehow lost the version of
11779 our descriptor appearing in the consensus. Fixes part of bug 21534;
11780 bugfix on 0.2.0.1-alpha. This issue is also tracked as TROVE-2017-012
11783 o Minor features (bridge, backport from 0.3.1.9):
11784 - Bridges now include notice in their descriptors that they are
11785 bridges, and notice of their distribution status, based on their
11786 publication settings. Implements ticket 18329. For more fine-
11787 grained control of how a bridge is distributed, upgrade to 0.3.2.x
11790 o Minor features (directory authority, backport from 0.3.2.6-alpha):
11791 - Add an IPv6 address for the "bastet" directory authority. Closes
11794 o Minor features (geoip):
11795 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
11798 o Minor bugfixes (testing, backport from 0.3.1.6-rc):
11799 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
11800 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
11803 Changes in version 0.2.5.16 - 2017-12-01
11804 Tor 0.2.5.13 backports important security and stability bugfixes from
11805 later Tor releases. All Tor users should upgrade to this release, or
11806 to another of the releases coming out today.
11808 Note: the Tor 0.2.5 series will no longer be supported after 1 May
11809 2018. If you need a release with long-term support, please upgrade to
11810 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
11812 o Major bugfixes (security, backport from 0.3.2.6-alpha):
11813 - Fix a denial of service bug where an attacker could use a
11814 malformed directory object to cause a Tor instance to pause while
11815 OpenSSL would try to read a passphrase from the terminal. (Tor
11816 instances run without a terminal, which is the case for most Tor
11817 packages, are not impacted.) Fixes bug 24246; bugfix on every
11818 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
11819 Found by OSS-Fuzz as testcase 6360145429790720.
11820 - When checking for replays in the INTRODUCE1 cell data for a
11821 (legacy) onion service, correctly detect replays in the RSA-
11822 encrypted part of the cell. We were previously checking for
11823 replays on the entire cell, but those can be circumvented due to
11824 the malleability of Tor's legacy hybrid encryption. This fix helps
11825 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
11826 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
11829 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
11830 - When running as a relay, make sure that we never build a path
11831 through ourselves, even in the case where we have somehow lost the
11832 version of our descriptor appearing in the consensus. Fixes part
11833 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
11834 as TROVE-2017-012 and CVE-2017-8822.
11836 o Minor features (bridge, backport from 0.3.1.9):
11837 - Bridges now include notice in their descriptors that they are
11838 bridges, and notice of their distribution status, based on their
11839 publication settings. Implements ticket 18329. For more fine-
11840 grained control of how a bridge is distributed, upgrade to 0.3.2.x
11843 o Minor features (geoip):
11844 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
11848 Changes in version 0.3.2.5-alpha - 2017-11-22
11849 Tor 0.3.2.5-alpha is the fifth alpha release in the 0.3.2.x series. It
11850 fixes several stability and reliability bugs, including a fix for
11851 intermittent bootstrapping failures that some people have been seeing
11852 since the 0.3.0.x series.
11854 Please test this alpha out -- many of these fixes will soon be
11855 backported to stable Tor versions if no additional bugs are found
11858 o Major bugfixes (bootstrapping):
11859 - Fetch descriptors aggressively whenever we lack enough to build
11860 circuits, regardless of how many descriptors we are missing.
11861 Previously, we would delay launching the fetch when we had fewer
11862 than 15 missing descriptors, even if some of those descriptors
11863 were blocking circuits from building. Fixes bug 23985; bugfix on
11864 0.1.1.11-alpha. The effects of this bug became worse in
11865 0.3.0.3-alpha, when we began treating missing descriptors from our
11866 primary guards as a reason to delay circuits.
11867 - Don't try fetching microdescriptors from relays that have failed
11868 to deliver them in the past. Fixes bug 23817; bugfix
11871 o Minor features (directory authority):
11872 - Make the "Exit" flag assignment only depend on whether the exit
11873 policy allows connections to ports 80 and 443. Previously relays
11874 would get the Exit flag if they allowed connections to one of
11875 these ports and also port 6667. Resolves ticket 23637.
11877 o Minor features (geoip):
11878 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
11881 o Minor features (linux seccomp2 sandbox):
11882 - Update the sandbox rules so that they should now work correctly
11883 with Glibc 2.26. Closes ticket 24315.
11885 o Minor features (logging):
11886 - Downgrade a pair of log messages that could occur when an exit's
11887 resolver gave us an unusual (but not forbidden) response. Closes
11889 - Improve the message we log when re-enabling circuit build timeouts
11890 after having received a consensus. Closes ticket 20963.
11892 o Minor bugfixes (compilation):
11893 - Fix a memory leak warning in one of the libevent-related
11894 configuration tests that could occur when manually specifying
11895 -fsanitize=address. Fixes bug 24279; bugfix on 0.3.0.2-alpha.
11896 Found and patched by Alex Xu.
11897 - When detecting OpenSSL on Windows from our configure script, make
11898 sure to try linking with the ws2_32 library. Fixes bug 23783;
11899 bugfix on 0.3.2.2-alpha.
11901 o Minor bugfixes (control port, linux seccomp2 sandbox):
11902 - Avoid a crash when attempting to use the seccomp2 sandbox together
11903 with the OwningControllerProcess feature. Fixes bug 24198; bugfix
11906 o Minor bugfixes (control port, onion services):
11907 - Report "FAILED" instead of "UPLOAD_FAILED" "FAILED" for the
11908 HS_DESC event when a service is not able to upload a descriptor.
11909 Fixes bug 24230; bugfix on 0.2.7.1-alpha.
11911 o Minor bugfixes (directory cache):
11912 - Recover better from empty or corrupt files in the consensus cache
11913 directory. Fixes bug 24099; bugfix on 0.3.1.1-alpha.
11914 - When a consensus diff calculation is only partially successful,
11915 only record the successful parts as having succeeded. Partial
11916 success can happen if (for example) one compression method fails
11917 but the others succeed. Previously we misrecorded all the
11918 calculations as having succeeded, which would later cause a
11919 nonfatal assertion failure. Fixes bug 24086; bugfix
11922 o Minor bugfixes (logging):
11923 - Only log once if we notice that KIST support is gone. Fixes bug
11924 24158; bugfix on 0.3.2.1-alpha.
11925 - Suppress a log notice when relay descriptors arrive. We already
11926 have a bootstrap progress for this so no need to log notice
11927 everytime tor receives relay descriptors. Microdescriptors behave
11928 the same. Fixes bug 23861; bugfix on 0.2.8.2-alpha.
11930 o Minor bugfixes (network layer):
11931 - When closing a connection via close_connection_immediately(), we
11932 mark it as "not blocked on bandwidth", to prevent later calls from
11933 trying to unblock it, and give it permission to read. This fixes a
11934 backtrace warning that can happen on relays under various
11935 circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
11937 o Minor bugfixes (onion services):
11938 - The introduction circuit was being timed out too quickly while
11939 waiting for the rendezvous circuit to complete. Keep the intro
11940 circuit around longer instead of timing out and reopening new ones
11941 constantly. Fixes bug 23681; bugfix on 0.2.4.8-alpha.
11942 - Rename the consensus parameter "hsdir-interval" to "hsdir_interval"
11943 so it matches dir-spec.txt. Fixes bug 24262; bugfix
11945 - Silence a warning about failed v3 onion descriptor uploads that
11946 can happen naturally under certain edge cases. Fixes part of bug
11947 23662; bugfix on 0.3.2.1-alpha.
11949 o Minor bugfixes (tests):
11950 - Fix a memory leak in one of the bridge-distribution test cases.
11951 Fixes bug 24345; bugfix on 0.3.2.3-alpha.
11952 - Fix a bug in our fuzzing mock replacement for crypto_pk_checksig(),
11953 to correctly handle cases where a caller gives it an RSA key of
11954 under 160 bits. (This is not actually a bug in Tor itself, but
11955 rather in our fuzzing code.) Fixes bug 24247; bugfix on
11956 0.3.0.3-alpha. Found by OSS-Fuzz as issue 4177.
11959 - Add notes in man page regarding OS support for the various
11960 scheduler types. Attempt to use less jargon in the scheduler
11961 section. Closes ticket 24254.
11964 Changes in version 0.3.2.4-alpha - 2017-11-08
11965 Tor 0.3.2.4-alpha is the fourth alpha release in the 0.3.2.x series.
11966 It fixes several stability and reliability bugs, especially including
11967 a major reliability issue that has been plaguing fast exit relays in
11970 o Major bugfixes (exit relays, DNS):
11971 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
11972 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
11973 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
11974 identifying and finding a workaround to this bug and to Moritz,
11975 Arthur Edelstein, and Roger for helping to track it down and
11978 o Major bugfixes (scheduler, channel):
11979 - Stop processing scheduled channels if they closed while flushing
11980 cells. This can happen if the write on the connection fails
11981 leading to the channel being closed while in the scheduler loop.
11982 Fixes bug 23751; bugfix on 0.3.2.1-alpha.
11984 o Minor features (logging, scheduler):
11985 - Introduce a SCHED_BUG() function to log extra information about
11986 the scheduler state if we ever catch a bug in the scheduler.
11987 Closes ticket 23753.
11989 o Minor features (removed deprecations):
11990 - The ClientDNSRejectInternalAddresses flag can once again be set in
11991 non-testing Tor networks, so long as they do not use the default
11992 directory authorities. This change also removes the deprecation of
11993 this flag from 0.2.9.2-alpha. Closes ticket 21031.
11995 o Minor features (testing):
11996 - Our fuzzing tests now test the encrypted portions of v3 onion
11997 service descriptors. Implements more of 21509.
11999 o Minor bugfixes (directory client):
12000 - On failure to download directory information, delay retry attempts
12001 by a random amount based on the "decorrelated jitter" algorithm.
12002 Our previous delay algorithm tended to produce extra-long delays
12003 too easily. Fixes bug 23816; bugfix on 0.2.9.1-alpha.
12005 o Minor bugfixes (IPv6, v3 single onion services):
12006 - Remove buggy code for IPv6-only v3 single onion services, and
12007 reject attempts to configure them. This release supports IPv4,
12008 dual-stack, and IPv6-only v3 onion services; and IPv4 and dual-
12009 stack v3 single onion services. Fixes bug 23820; bugfix
12012 o Minor bugfixes (logging, relay):
12013 - Give only a protocol warning when the ed25519 key is not
12014 consistent between the descriptor and microdescriptor of a relay.
12015 This can happen, for instance, if the relay has been flagged
12016 NoEdConsensus. Fixes bug 24025; bugfix on 0.3.2.1-alpha.
12018 o Minor bugfixes (manpage, onion service):
12019 - Document that the HiddenServiceNumIntroductionPoints option is
12020 0-10 for v2 services and 0-20 for v3 services. Fixes bug 24115;
12021 bugfix on 0.3.2.1-alpha.
12023 o Minor bugfixes (memory leaks):
12024 - Fix a minor memory leak at exit in the KIST scheduler. This bug
12025 should have no user-visible impact. Fixes bug 23774; bugfix
12027 - Fix a memory leak when decrypting a badly formatted v3 onion
12028 service descriptor. Fixes bug 24150; bugfix on 0.3.2.1-alpha.
12029 Found by OSS-Fuzz; this is OSS-Fuzz issue 3994.
12031 o Minor bugfixes (onion services):
12032 - Cache some needed onion service client information instead of
12033 constantly computing it over and over again. Fixes bug 23623;
12034 bugfix on 0.3.2.1-alpha.
12035 - Properly retry HSv3 descriptor fetches when missing required
12036 directory information. Fixes bug 23762; bugfix on 0.3.2.1-alpha.
12038 o Minor bugfixes (path selection):
12039 - When selecting relays by bandwidth, avoid a rounding error that
12040 could sometimes cause load to be imbalanced incorrectly.
12041 Previously, we would always round upwards; now, we round towards
12042 the nearest integer. This had the biggest effect when a relay's
12043 weight adjustments should have given it weight 0, but it got
12044 weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
12045 - When calculating the fraction of nodes that have descriptors, and
12046 all nodes in the network have zero bandwidths, count the number of
12047 nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
12048 - Actually log the total bandwidth in compute_weighted_bandwidths().
12049 Fixes bug 24170; bugfix on 0.2.4.3-alpha.
12051 o Minor bugfixes (relay, crash):
12052 - Avoid a crash when transitioning from client mode to bridge mode.
12053 Previously, we would launch the worker threads whenever our
12054 "public server" mode changed, but not when our "server" mode
12055 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
12057 o Minor bugfixes (testing):
12058 - Fix a spurious fuzzing-only use of an uninitialized value. Found
12059 by Brian Carpenter. Fixes bug 24082; bugfix on 0.3.0.3-alpha.
12060 - Test that IPv6-only clients can use microdescriptors when running
12061 "make test-network-all". Requires chutney master 61c28b9 or later.
12062 Closes ticket 24109.
12065 Changes in version 0.3.2.3-alpha - 2017-10-27
12066 Tor 0.3.2.3-alpha is the third release in the 0.3.2 series. It fixes
12067 numerous small bugs in earlier versions of 0.3.2.x, and adds a new
12068 directory authority, Bastet.
12070 o Directory authority changes:
12071 - Add "Bastet" as a ninth directory authority to the default list.
12072 Closes ticket 23910.
12073 - The directory authority "Longclaw" has changed its IP address.
12074 Closes ticket 23592.
12076 o Minor features (bridge):
12077 - Bridge relays can now set the BridgeDistribution config option to
12078 add a "bridge-distribution-request" line to their bridge
12079 descriptor, which tells BridgeDB how they'd like their bridge
12080 address to be given out. (Note that as of Oct 2017, BridgeDB does
12081 not yet implement this feature.) As a side benefit, this feature
12082 provides a way to distinguish bridge descriptors from non-bridge
12083 descriptors. Implements tickets 18329.
12085 o Minor features (client, entry guards):
12086 - Improve log messages when missing descriptors for primary guards.
12087 Resolves ticket 23670.
12089 o Minor features (geoip):
12090 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
12093 o Minor bugfixes (bridge):
12094 - Overwrite the bridge address earlier in the process of retrieving
12095 its descriptor, to make sure we reach it on the configured
12096 address. Fixes bug 20532; bugfix on 0.2.0.10-alpha.
12098 o Minor bugfixes (documentation):
12099 - Document better how to read gcov, and what our gcov postprocessing
12100 scripts do. Fixes bug 23739; bugfix on 0.2.9.1-alpha.
12102 o Minor bugfixes (entry guards):
12103 - Tor now updates its guard state when it reads a consensus
12104 regardless of whether it's missing descriptors. That makes tor use
12105 its primary guards to fetch descriptors in some edge cases where
12106 it would previously have used fallback directories. Fixes bug
12107 23862; bugfix on 0.3.0.1-alpha.
12109 o Minor bugfixes (hidden service client):
12110 - When handling multiple SOCKS request for the same .onion address,
12111 only fetch the service descriptor once.
12112 - When a descriptor fetch fails with a non-recoverable error, close
12113 all pending SOCKS requests for that .onion. Fixes bug 23653;
12114 bugfix on 0.3.2.1-alpha.
12116 o Minor bugfixes (hidden service):
12117 - Always regenerate missing hidden service public key files. Prior
12118 to this, if the public key was deleted from disk, it wouldn't get
12119 recreated. Fixes bug 23748; bugfix on 0.3.2.2-alpha. Patch
12121 - Make sure that we have a usable ed25519 key when the intro point
12122 relay supports ed25519 link authentication. Fixes bug 24002;
12123 bugfix on 0.3.2.1-alpha.
12125 o Minor bugfixes (hidden service, v2):
12126 - When reloading configured hidden services, copy all information
12127 from the old service object. Previously, some data was omitted,
12128 causing delays in descriptor upload, and other bugs. Fixes bug
12129 23790; bugfix on 0.2.1.9-alpha.
12131 o Minor bugfixes (memory safety, defensive programming):
12132 - Clear the target address when node_get_prim_orport() returns
12133 early. Fixes bug 23874; bugfix on 0.2.8.2-alpha.
12135 o Minor bugfixes (relay):
12136 - Avoid a BUG warning when receiving a dubious CREATE cell while an
12137 option transition is in progress. Fixes bug 23952; bugfix
12140 o Minor bugfixes (testing):
12141 - Adjust the GitLab CI configuration to more closely match that of
12142 Travis CI. Fixes bug 23757; bugfix on 0.3.2.2-alpha.
12143 - Prevent scripts/test/coverage from attempting to move gcov output
12144 to the root directory. Fixes bug 23741; bugfix on 0.2.5.1-alpha.
12145 - When running unit tests as root, skip a test that would fail
12146 because it expects a permissions error. This affects some
12147 continuous integration setups. Fixes bug 23758; bugfix
12149 - Stop unconditionally mirroring the tor repository in GitLab CI.
12150 This prevented developers from enabling GitLab CI on master. Fixes
12151 bug 23755; bugfix on 0.3.2.2-alpha.
12152 - Fix the hidden service v3 descriptor decoding fuzzing to use the
12153 latest decoding API correctly. Fixes bug 21509; bugfix
12156 o Minor bugfixes (warnings):
12157 - When we get an HTTP request on a SOCKS port, tell the user about
12158 the new HTTPTunnelPort option. Previously, we would give a "Tor is
12159 not an HTTP Proxy" message, which stopped being true when
12160 HTTPTunnelPort was introduced. Fixes bug 23678; bugfix
12164 Changes in version 0.2.5.15 - 2017-10-25
12165 Tor 0.2.5.15 backports a collection of bugfixes from later Tor release
12166 series. It also adds a new directory authority, Bastet.
12168 Note: the Tor 0.2.5 series will no longer be supported after 1 May
12169 2018. If you need a release with long-term support, please upgrade to
12170 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
12172 o Directory authority changes:
12173 - Add "Bastet" as a ninth directory authority to the default list.
12174 Closes ticket 23910.
12175 - The directory authority "Longclaw" has changed its IP address.
12176 Closes ticket 23592.
12178 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
12179 - Avoid an assertion failure bug affecting our implementation of
12180 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
12181 handling of "0xx" differs from what we had expected. Fixes bug
12182 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
12184 o Minor features (geoip):
12185 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
12188 o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
12189 - Fix a memset() off the end of an array when packing cells. This
12190 bug should be harmless in practice, since the corrupted bytes are
12191 still in the same structure, and are always padding bytes,
12192 ignored, or immediately overwritten, depending on compiler
12193 behavior. Nevertheless, because the memset()'s purpose is to make
12194 sure that any other cell-handling bugs can't expose bytes to the
12195 network, we need to fix it. Fixes bug 22737; bugfix on
12196 0.2.4.11-alpha. Fixes CID 1401591.
12198 o Build features (backport from 0.3.1.5-alpha):
12199 - Tor's repository now includes a Travis Continuous Integration (CI)
12200 configuration file (.travis.yml). This is meant to help new
12201 developers and contributors who fork Tor to a Github repository be
12202 better able to test their changes, and understand what we expect
12203 to pass. To use this new build feature, you must fork Tor to your
12204 Github account, then go into the "Integrations" menu in the
12205 repository settings for your fork and enable Travis, then push
12206 your changes. Closes ticket 22636.
12209 Changes in version 0.2.8.16 - 2017-10-25
12210 Tor 0.2.8.16 backports a collection of bugfixes from later Tor release
12211 series, including a bugfix for a crash issue that had affected relays
12212 under memory pressure. It also adds a new directory authority, Bastet.
12214 Note: the Tor 0.2.8 series will no longer be supported after 1 Jan
12215 2018. If you need a release with long-term support, please stick with
12216 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
12218 o Directory authority changes:
12219 - Add "Bastet" as a ninth directory authority to the default list.
12220 Closes ticket 23910.
12221 - The directory authority "Longclaw" has changed its IP address.
12222 Closes ticket 23592.
12224 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
12225 - Fix a timing-based assertion failure that could occur when the
12226 circuit out-of-memory handler freed a connection's output buffer.
12227 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
12229 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
12230 - Remove longclaw's IPv6 address, as it will soon change. Authority
12231 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
12232 3/8 directory authorities with IPv6 addresses, but there are also
12233 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
12235 o Minor features (geoip):
12236 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
12240 Changes in version 0.2.9.13 - 2017-10-25
12241 Tor 0.2.9.13 backports a collection of bugfixes from later Tor release
12242 series, including a bugfix for a crash issue that had affected relays
12243 under memory pressure. It also adds a new directory authority, Bastet.
12245 o Directory authority changes:
12246 - Add "Bastet" as a ninth directory authority to the default list.
12247 Closes ticket 23910.
12248 - The directory authority "Longclaw" has changed its IP address.
12249 Closes ticket 23592.
12251 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
12252 - Fix a timing-based assertion failure that could occur when the
12253 circuit out-of-memory handler freed a connection's output buffer.
12254 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
12256 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
12257 - Remove longclaw's IPv6 address, as it will soon change. Authority
12258 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
12259 3/8 directory authorities with IPv6 addresses, but there are also
12260 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
12262 o Minor features (geoip):
12263 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
12266 o Minor bugfixes (directory authority, backport from 0.3.1.5-alpha):
12267 - When a directory authority rejects a descriptor or extrainfo with
12268 a given digest, mark that digest as undownloadable, so that we do
12269 not attempt to download it again over and over. We previously
12270 tried to avoid downloading such descriptors by other means, but we
12271 didn't notice if we accidentally downloaded one anyway. This
12272 behavior became problematic in 0.2.7.2-alpha, when authorities
12273 began pinning Ed25519 keys. Fixes bug 22349; bugfix
12276 o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
12277 - Clear the address when node_get_prim_orport() returns early.
12278 Fixes bug 23874; bugfix on 0.2.8.2-alpha.
12280 o Minor bugfixes (Windows service, backport from 0.3.1.6-rc):
12281 - When running as a Windows service, set the ID of the main thread
12282 correctly. Failure to do so made us fail to send log messages to
12283 the controller in 0.2.1.16-rc, slowed down controller event
12284 delivery in 0.2.7.3-rc and later, and crash with an assertion
12285 failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
12286 Patch and diagnosis from "Vort".
12289 Changes in version 0.3.0.12 - 2017-10-25
12290 Tor 0.3.0.12 backports a collection of bugfixes from later Tor release
12291 series, including a bugfix for a crash issue that had affected relays
12292 under memory pressure. It also adds a new directory authority, Bastet.
12294 Note: the Tor 0.3.0 series will no longer be supported after 26 Jan
12295 2018. If you need a release with long-term support, please stick with
12296 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
12298 o Directory authority changes:
12299 - Add "Bastet" as a ninth directory authority to the default list.
12300 Closes ticket 23910.
12301 - The directory authority "Longclaw" has changed its IP address.
12302 Closes ticket 23592.
12304 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
12305 - Fix a timing-based assertion failure that could occur when the
12306 circuit out-of-memory handler freed a connection's output buffer.
12307 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
12309 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
12310 - Remove longclaw's IPv6 address, as it will soon change. Authority
12311 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
12312 3/8 directory authorities with IPv6 addresses, but there are also
12313 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
12315 o Minor features (geoip):
12316 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
12319 o Minor bugfixes (directory authority, backport from 0.3.1.5-alpha):
12320 - When a directory authority rejects a descriptor or extrainfo with
12321 a given digest, mark that digest as undownloadable, so that we do
12322 not attempt to download it again over and over. We previously
12323 tried to avoid downloading such descriptors by other means, but we
12324 didn't notice if we accidentally downloaded one anyway. This
12325 behavior became problematic in 0.2.7.2-alpha, when authorities
12326 began pinning Ed25519 keys. Fixes bug 22349; bugfix
12329 o Minor bugfixes (hidden service, relay, backport from 0.3.2.2-alpha):
12330 - Avoid a possible double close of a circuit by the intro point on
12331 error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
12332 bugfix on 0.3.0.1-alpha.
12334 o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
12335 - Clear the address when node_get_prim_orport() returns early.
12336 Fixes bug 23874; bugfix on 0.2.8.2-alpha.
12338 o Minor bugfixes (Windows service, backport from 0.3.1.6-rc):
12339 - When running as a Windows service, set the ID of the main thread
12340 correctly. Failure to do so made us fail to send log messages to
12341 the controller in 0.2.1.16-rc, slowed down controller event
12342 delivery in 0.2.7.3-rc and later, and crash with an assertion
12343 failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
12344 Patch and diagnosis from "Vort".
12347 Changes in version 0.3.1.8 - 2017-10-25
12348 Tor 0.3.1.8 is the second stable release in the 0.3.1 series.
12349 It includes several bugfixes, including a bugfix for a crash issue
12350 that had affected relays under memory pressure. It also adds
12351 a new directory authority, Bastet.
12353 o Directory authority changes:
12354 - Add "Bastet" as a ninth directory authority to the default list.
12355 Closes ticket 23910.
12356 - The directory authority "Longclaw" has changed its IP address.
12357 Closes ticket 23592.
12359 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
12360 - Fix a timing-based assertion failure that could occur when the
12361 circuit out-of-memory handler freed a connection's output buffer.
12362 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
12364 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
12365 - Remove longclaw's IPv6 address, as it will soon change. Authority
12366 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
12367 3/8 directory authorities with IPv6 addresses, but there are also
12368 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
12370 o Minor features (geoip):
12371 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
12374 o Minor bugfixes (compilation, backport from 0.3.2.2-alpha):
12375 - Fix a compilation warning when building with zstd support on
12376 32-bit platforms. Fixes bug 23568; bugfix on 0.3.1.1-alpha. Found
12377 and fixed by Andreas Stieger.
12379 o Minor bugfixes (compression, backport from 0.3.2.2-alpha):
12380 - Handle a pathological case when decompressing Zstandard data when
12381 the output buffer size is zero. Fixes bug 23551; bugfix
12384 o Minor bugfixes (directory authority, backport from 0.3.2.1-alpha):
12385 - Remove the length limit on HTTP status lines that authorities can
12386 send in their replies. Fixes bug 23499; bugfix on 0.3.1.6-rc.
12388 o Minor bugfixes (hidden service, relay, backport from 0.3.2.2-alpha):
12389 - Avoid a possible double close of a circuit by the intro point on
12390 error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
12391 bugfix on 0.3.0.1-alpha.
12393 o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
12394 - Clear the address when node_get_prim_orport() returns early.
12395 Fixes bug 23874; bugfix on 0.2.8.2-alpha.
12397 o Minor bugfixes (unit tests, backport from 0.3.2.2-alpha):
12398 - Fix additional channelpadding unit test failures by using mocked
12399 time instead of actual time for all tests. Fixes bug 23608; bugfix
12403 Changes in version 0.3.2.2-alpha - 2017-09-29
12404 Tor 0.3.2.2-alpha is the second release in the 0.3.2 series. This
12405 release fixes several minor bugs in the new scheduler and next-
12406 generation onion services; both features were newly added in the 0.3.2
12407 series. Other fixes in this alpha include several fixes for non-fatal
12408 tracebacks which would appear in logs.
12410 With the aim to stabilise the 0.3.2 series by 15 December 2017, this
12411 alpha does not contain any substantial new features. Minor features
12412 include better testing and logging.
12414 The following comprises the complete list of changes included
12417 o Major bugfixes (relay, crash, assertion failure):
12418 - Fix a timing-based assertion failure that could occur when the
12419 circuit out-of-memory handler freed a connection's output buffer.
12420 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
12422 o Major bugfixes (scheduler):
12423 - If a channel is put into the scheduler's pending list, then it
12424 starts closing, and then if the scheduler runs before it finishes
12425 closing, the scheduler will get stuck trying to flush its cells
12426 while the lower layers refuse to cooperate. Fix that race
12427 condition by giving the scheduler an escape method. Fixes bug
12428 23676; bugfix on 0.3.2.1-alpha.
12430 o Minor features (build, compilation):
12431 - The "check-changes" feature is now part of the "make check" tests;
12432 we'll use it to try to prevent misformed changes files from
12433 accumulating. Closes ticket 23564.
12434 - Tor builds should now fail if there are any mismatches between the
12435 C type representing a configuration variable and the C type the
12436 data-driven parser uses to store a value there. Previously, we
12437 needed to check these by hand, which sometimes led to mistakes.
12438 Closes ticket 23643.
12440 o Minor features (directory authorities):
12441 - Remove longclaw's IPv6 address, as it will soon change. Authority
12442 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
12443 3/8 directory authorities with IPv6 addresses, but there are also
12444 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
12446 o Minor features (hidden service, circuit, logging):
12447 - Improve logging of many callsite in the circuit subsystem to print
12448 the circuit identifier(s).
12449 - Log when we cleanup an intro point from a service so we know when
12450 and for what reason it happened. Closes ticket 23604.
12452 o Minor features (logging):
12453 - Log more circuit information whenever we are about to try to
12454 package a relay cell on a circuit with a nonexistent n_chan.
12455 Attempt to diagnose ticket 8185.
12456 - Improve info-level log identification of particular circuits, to
12457 help with debugging. Closes ticket 23645.
12459 o Minor features (relay):
12460 - When choosing which circuits can be expired as unused, consider
12461 circuits from clients even if those clients used regular CREATE
12462 cells to make them; and do not consider circuits from relays even
12463 if they were made with CREATE_FAST. Part of ticket 22805.
12465 o Minor features (robustness):
12466 - Change several fatal assertions when flushing buffers into non-
12467 fatal assertions, to prevent any recurrence of 23690.
12469 o Minor features (spec conformance, bridge, diagnostic):
12470 - When handling the USERADDR command on an ExtOrPort, warn when the
12471 transports provides a USERADDR with no port. In a future version,
12472 USERADDR commands of this format may be rejected. Detects problems
12473 related to ticket 23080.
12475 o Minor features (testing):
12476 - Add a unit test to make sure that our own generated platform
12477 string will be accepted by directory authorities. Closes
12480 o Minor bugfixes (bootstrapping):
12481 - When warning about state file clock skew, report the correct
12482 direction for the detected skew. Fixes bug 23606; bugfix
12484 - Avoid an assertion failure when logging a state file clock skew
12485 very early in bootstrapping. Fixes bug 23607; bugfix
12488 o Minor bugfixes (build, compilation):
12489 - Fix a compilation warning when building with zstd support on
12490 32-bit platforms. Fixes bug 23568; bugfix on 0.3.1.1-alpha. Found
12491 and fixed by Andreas Stieger.
12492 - When searching for OpenSSL, don't accept any OpenSSL library that
12493 lacks TLSv1_1_method(): Tor doesn't build with those versions.
12494 Additionally, look in /usr/local/opt/openssl, if it's present.
12495 These changes together repair the default build on OSX systems
12496 with Homebrew installed. Fixes bug 23602; bugfix on 0.2.7.2-alpha.
12498 o Minor bugfixes (compression):
12499 - Handle a pathological case when decompressing Zstandard data when
12500 the output buffer size is zero. Fixes bug 23551; bugfix
12503 o Minor bugfixes (documentation):
12504 - Fix manpage to not refer to the obsolete (and misspelled)
12505 UseEntryGuardsAsDirectoryGuards parameter in the description of
12506 NumDirectoryGuards. Fixes bug 23611; bugfix on 0.2.4.8-alpha.
12508 o Minor bugfixes (hidden service v3):
12509 - Don't log an assertion failure when we can't find the right
12510 information to extend to an introduction point. In rare cases,
12511 this could happen, causing a warning, even though tor would
12512 recover gracefully. Fixes bug 23159; bugfix on 0.3.2.1-alpha.
12513 - Pad RENDEZVOUS cell up to the size of the legacy cell which is
12514 much bigger so the rendezvous point can't distinguish which hidden
12515 service protocol is being used. Fixes bug 23420; bugfix
12518 o Minor bugfixes (hidden service, relay):
12519 - Avoid a possible double close of a circuit by the intro point on
12520 error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
12521 bugfix on 0.3.0.1-alpha.
12523 o Minor bugfixes (logging, relay shutdown, annoyance):
12524 - When a circuit is marked for close, do not attempt to package any
12525 cells for channels on that circuit. Previously, we would detect
12526 this condition lower in the call stack, when we noticed that the
12527 circuit had no attached channel, and log an annoying message.
12528 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
12530 o Minor bugfixes (scheduler):
12531 - When switching schedulers due to a consensus change, we didn't
12532 give the new scheduler a chance to react to the consensus. Fix
12533 that. Fixes bug 23537; bugfix on 0.3.2.1-alpha.
12534 - Make the KISTSchedRunInterval option a non negative value. With
12535 this, the way to disable KIST through the consensus is to set it
12536 to 0. Fixes bug 23539; bugfix on 0.3.2.1-alpha.
12537 - Only notice log the selected scheduler when we switch scheduler
12538 types. Fixes bug 23552; bugfix on 0.3.2.1-alpha.
12539 - Avoid a compilation warning on macOS in scheduler_ev_add() caused
12540 by a different tv_usec data type. Fixes bug 23575; bugfix
12542 - Make a hard exit if tor is unable to pick a scheduler which can
12543 happen if the user specifies a scheduler type that is not
12544 supported and not other types in Schedulers. Fixes bug 23581;
12545 bugfix on 0.3.2.1-alpha.
12546 - Properly initialize the scheduler last run time counter so it is
12547 not 0 at the first tick. Fixes bug 23696; bugfix on 0.3.2.1-alpha.
12549 o Minor bugfixes (testing):
12550 - Capture and detect several "Result does not fit" warnings in unit
12551 tests on platforms with 32-bit time_t. Fixes bug 21800; bugfix
12553 - Fix additional channelpadding unit test failures by using mocked
12554 time instead of actual time for all tests. Fixes bug 23608; bugfix
12556 - The removal of some old scheduler options caused some tests to
12557 fail on BSD systems. Assume current behavior is correct and make
12558 the tests pass again. Fixes bug 23566; bugfix on 0.3.2.1-alpha.
12560 o Code simplification and refactoring:
12561 - Remove various ways of testing circuits and connections for
12562 "clientness"; instead, favor channel_is_client(). Part of
12565 o Deprecated features:
12566 - The ReachableDirAddresses and ClientPreferIPv6DirPort options are
12567 now deprecated; they do not apply to relays, and they have had no
12568 effect on clients since 0.2.8.x. Closes ticket 19704.
12571 - HiddenServiceVersion man page entry wasn't mentioning the now
12572 supported version 3. Fixes ticket 23580; bugfix on 0.3.2.1-alpha.
12573 - Clarify that the Address option is entirely about setting an
12574 advertised IPv4 address. Closes ticket 18891.
12575 - Clarify the manpage's use of the term "address" to clarify what
12576 kind of address is intended. Closes ticket 21405.
12577 - Document that onion service subdomains are allowed, and ignored.
12578 Closes ticket 18736.
12581 Changes in version 0.3.2.1-alpha - 2017-09-18
12582 Tor 0.3.2.1-alpha is the first release in the 0.3.2.x series. It
12583 includes support for our next-generation ("v3") onion service
12584 protocol, and adds a new circuit scheduler for more responsive
12585 forwarding decisions from relays. There are also numerous other small
12586 features and bugfixes here.
12588 Below are the changes since Tor 0.3.1.7.
12590 o Major feature (scheduler, channel):
12591 - Tor now uses new schedulers to decide which circuits should
12592 deliver cells first, in order to improve congestion at relays. The
12593 first type is called "KIST" ("Kernel Informed Socket Transport"),
12594 and is only available on Linux-like systems: it uses feedback from
12595 the kernel to prevent the kernel's TCP buffers from growing too
12596 full. The second new scheduler type is called "KISTLite": it
12597 behaves the same as KIST, but runs on systems without kernel
12598 support for inspecting TCP implementation details. The old
12599 scheduler is still available, under the name "Vanilla". To change
12600 the default scheduler preference order, use the new "Schedulers"
12601 option. (The default preference order is "KIST,KISTLite,Vanilla".)
12603 Matt Traudt implemented KIST, based on research by Rob Jansen,
12604 John Geddes, Christ Wacek, Micah Sherr, and Paul Syverson. For
12605 more information, see the design paper at
12606 http://www.robgjansen.com/publications/kist-sec2014.pdf and the
12607 followup implementation paper at https://arxiv.org/abs/1709.01044.
12608 Closes ticket 12541.
12610 o Major features (next-generation onion services):
12611 - Tor now supports the next-generation onion services protocol for
12612 clients and services! As part of this release, the core of
12613 proposal 224 has been implemented and is available for
12614 experimentation and testing by our users. This newer version of
12615 onion services ("v3") features many improvements over the legacy
12618 a) Better crypto (replaced SHA1/DH/RSA1024
12619 with SHA3/ed25519/curve25519)
12621 b) Improved directory protocol, leaking much less information to
12624 c) Improved directory protocol, with smaller surface for
12627 d) Better onion address security against impersonation.
12629 e) More extensible introduction/rendezvous protocol.
12631 f) A cleaner and more modular codebase.
12633 You can identify a next-generation onion address by its length:
12634 they are 56 characters long, as in
12635 "4acth47i6kxnvkewtm6q7ib2s3ufpo5sqbsnzjpbi7utijcltosqemad.onion".
12637 In the future, we will release more options and features for v3
12638 onion services, but we first need a testing period, so that the
12639 current codebase matures and becomes more robust. Planned features
12640 include: offline keys, advanced client authorization, improved
12641 guard algorithms, and statistics. For full details, see
12644 Legacy ("v2") onion services will still work for the foreseeable
12645 future, and will remain the default until this new codebase gets
12646 tested and hardened. Service operators who want to experiment with
12647 the new system can use the 'HiddenServiceVersion 3' torrc
12648 directive along with the regular onion service configuration
12649 options. We will publish a blog post about this new feature
12652 o Major bugfixes (usability, control port):
12653 - Report trusted clock skew indications as bootstrap errors, so
12654 controllers can more easily alert users when their clocks are
12655 wrong. Fixes bug 23506; bugfix on 0.1.2.6-alpha.
12657 o Minor features (bug detection):
12658 - Log a warning message with a stack trace for any attempt to call
12659 get_options() during option validation. This pattern has caused
12660 subtle bugs in the past. Closes ticket 22281.
12662 o Minor features (client):
12663 - You can now use Tor as a tunneled HTTP proxy: use the new
12664 HTTPTunnelPort option to open a port that accepts HTTP CONNECT
12665 requests. Closes ticket 22407.
12666 - Add an extra check to make sure that we always use the newer guard
12667 selection code for picking our guards. Closes ticket 22779.
12668 - When downloading (micro)descriptors, don't split the list into
12669 multiple requests unless we want at least 32 descriptors.
12670 Previously, we split at 4, not 32, which led to significant
12671 overhead in HTTP request size and degradation in compression
12672 performance. Closes ticket 23220.
12674 o Minor features (command line):
12675 - Add a new commandline option, --key-expiration, which prints when
12676 the current signing key is going to expire. Implements ticket
12677 17639; patch by Isis Lovecruft.
12679 o Minor features (control port):
12680 - If an application tries to use the control port as an HTTP proxy,
12681 respond with a meaningful "This is the Tor control port" message,
12682 and log the event. Closes ticket 1667. Patch from Ravi
12684 - Provide better error message for GETINFO desc/(id|name) when not
12685 fetching router descriptors. Closes ticket 5847. Patch by
12687 - Add GETINFO "{desc,md}/download-enabled", to inform the controller
12688 whether Tor will try to download router descriptors and
12689 microdescriptors respectively. Closes ticket 22684.
12690 - Added new GETINFO targets "ip-to-country/{ipv4,ipv6}-available",
12691 so controllers can tell whether the geoip databases are loaded.
12692 Closes ticket 23237.
12693 - Adds a timestamp field to the CIRC_BW and STREAM_BW bandwidth
12694 events. Closes ticket 19254. Patch by "DonnchaC".
12696 o Minor features (development support):
12697 - Developers can now generate a call-graph for Tor using the
12698 "calltool" python program, which post-processes object dumps. It
12699 should work okay on many Linux and OSX platforms, and might work
12700 elsewhere too. To run it, install calltool from
12701 https://gitweb.torproject.org/user/nickm/calltool.git and run
12702 "make callgraph". Closes ticket 19307.
12704 o Minor features (ed25519):
12705 - Add validation function to checks for torsion components in
12706 ed25519 public keys, used by prop224 client-side code. Closes
12707 ticket 22006. Math help by Ian Goldberg.
12709 o Minor features (exit relay, DNS):
12710 - Improve the clarity and safety of the log message from evdns when
12711 receiving an apparently spoofed DNS reply. Closes ticket 3056.
12713 o Minor features (integration, hardening):
12714 - Add a new NoExec option to prevent Tor from running other
12715 programs. When this option is set to 1, Tor will never try to run
12716 another program, regardless of the settings of
12717 PortForwardingHelper, ClientTransportPlugin, or
12718 ServerTransportPlugin. Once NoExec is set, it cannot be disabled
12719 without restarting Tor. Closes ticket 22976.
12721 o Minor features (logging):
12722 - Improve the warning message for specifying a relay by nickname.
12723 The previous message implied that nickname registration was still
12724 part of the Tor network design, which it isn't. Closes
12726 - If the sandbox filter fails to load, suggest to the user that
12727 their kernel might not support seccomp2. Closes ticket 23090.
12729 o Minor features (portability):
12730 - Check at configure time whether uint8_t is the same type as
12731 unsigned char. Lots of existing code already makes this
12732 assumption, and there could be strict aliasing issues if the
12733 assumption is violated. Closes ticket 22410.
12735 o Minor features (relay, configuration):
12736 - Reject attempts to use relative file paths when RunAsDaemon is
12737 set. Previously, Tor would accept these, but the directory-
12738 changing step of RunAsDaemon would give strange and/or confusing
12739 results. Closes ticket 22731.
12741 o Minor features (startup, safety):
12742 - When configured to write a PID file, Tor now exits if it is unable
12743 to do so. Previously, it would warn and continue. Closes
12746 o Minor features (static analysis):
12747 - The BUG() macro has been changed slightly so that Coverity no
12748 longer complains about dead code if the bug is impossible. Closes
12751 o Minor features (testing):
12752 - The default chutney network tests now include tests for the v3
12753 hidden service design. Make sure you have the latest version of
12754 chutney if you want to run these. Closes ticket 22437.
12755 - Add a unit test to verify that we can parse a hardcoded v2 hidden
12756 service descriptor. Closes ticket 15554.
12758 o Minor bugfixes (certificate handling):
12759 - Fix a time handling bug in Tor certificates set to expire after
12760 the year 2106. Fixes bug 23055; bugfix on 0.3.0.1-alpha. Found by
12761 Coverity as CID 1415728.
12763 o Minor bugfixes (client, usability):
12764 - Refrain from needlessly rejecting SOCKS5-with-hostnames and
12765 SOCKS4a requests that contain IP address strings, even when
12766 SafeSocks in enabled, as this prevents user from connecting to
12767 known IP addresses without relying on DNS for resolving. SafeSocks
12768 still rejects SOCKS connections that connect to IP addresses when
12769 those addresses are _not_ encoded as hostnames. Fixes bug 22461;
12770 bugfix on Tor 0.2.6.2-alpha.
12772 o Minor bugfixes (code correctness):
12773 - Call htons() in extend_cell_format() for encoding a 16-bit value.
12774 Previously we used ntohs(), which happens to behave the same on
12775 all the platforms we support, but which isn't really correct.
12776 Fixes bug 23106; bugfix on 0.2.4.8-alpha.
12777 - For defense-in-depth, make the controller's write_escaped_data()
12778 function robust to extremely long inputs. Fixes bug 19281; bugfix
12779 on 0.1.1.1-alpha. Reported by Guido Vranken.
12781 o Minor bugfixes (compilation):
12782 - Fix unused-variable warnings in donna's Curve25519 SSE2 code.
12783 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
12785 o Minor bugfixes (consensus expiry):
12786 - Check for adequate directory information correctly. Previously, Tor
12787 would reconsider whether it had sufficient directory information
12788 every 2 minutes. Fixes bug 23091; bugfix on 0.2.0.19-alpha.
12790 o Minor bugfixes (directory protocol):
12791 - Directory servers now include a "Date:" http header for response
12792 codes other than 200. Clients starting with a skewed clock and a
12793 recent consensus were getting "304 Not modified" responses from
12794 directory authorities, so without the Date header, the client
12795 would never hear about a wrong clock. Fixes bug 23499; bugfix
12797 - Make clients wait for 6 seconds before trying to download a
12798 consensus from an authority. Fixes bug 17750; bugfix
12801 o Minor bugfixes (DoS-resistance):
12802 - If future code asks if there are any running bridges, without
12803 checking if bridges are enabled, log a BUG warning rather than
12804 crashing. Fixes bug 23524; bugfix on 0.3.0.1-alpha.
12806 o Minor bugfixes (format strictness):
12807 - Restrict several data formats to decimal. Previously, the
12808 BuildTimeHistogram entries in the state file, the "bw=" entries in
12809 the bandwidth authority file, and the process IDs passed to the
12810 __OwningControllerProcess option could all be specified in hex or
12811 octal as well as in decimal. This was not an intentional feature.
12812 Fixes bug 22802; bugfixes on 0.2.2.1-alpha, 0.2.2.2-alpha,
12815 o Minor bugfixes (heartbeat):
12816 - If we fail to write a heartbeat message, schedule a retry for the
12817 minimum heartbeat interval number of seconds in the future. Fixes
12818 bug 19476; bugfix on 0.2.3.1-alpha.
12820 o Minor bugfixes (linux seccomp2 sandbox, logging):
12821 - Fix some messages on unexpected errors from the seccomp2 library.
12822 Fixes bug 22750; bugfix on 0.2.5.1-alpha. Patch from "cypherpunks".
12824 o Minor bugfixes (logging):
12825 - Remove duplicate log messages regarding opening non-local
12826 SocksPorts upon parsing config and opening listeners at startup.
12827 Fixes bug 4019; bugfix on 0.2.3.3-alpha.
12828 - Use a more comprehensible log message when telling the user
12829 they've excluded every running exit node. Fixes bug 7890; bugfix
12831 - When logging the number of descriptors we intend to download per
12832 directory request, do not log a number higher than then the number
12833 of descriptors we're fetching in total. Fixes bug 19648; bugfix
12835 - When warning about a directory owned by the wrong user, log the
12836 actual name of the user owning the directory. Previously, we'd log
12837 the name of the process owner twice. Fixes bug 23487; bugfix
12839 - The tor specification says hop counts are 1-based, so fix two log
12840 messages that mistakenly logged 0-based hop counts. Fixes bug
12841 18982; bugfix on 0.2.6.2-alpha and 0.2.4.5-alpha. Patch by teor.
12842 Credit to Xiaofan Li for reporting this issue.
12844 o Minor bugfixes (portability):
12845 - Stop using the PATH_MAX variable, which is not defined on GNU
12846 Hurd. Fixes bug 23098; bugfix on 0.3.1.1-alpha.
12848 o Minor bugfixes (relay):
12849 - When uploading our descriptor for the first time after startup,
12850 report the reason for uploading as "Tor just started" rather than
12851 leaving it blank. Fixes bug 22885; bugfix on 0.2.3.4-alpha.
12852 - Avoid unnecessary calls to directory_fetches_from_authorities() on
12853 relays, to prevent spurious address resolutions and descriptor
12854 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
12855 bugfix on in 0.2.8.1-alpha.
12857 o Minor bugfixes (tests):
12858 - Fix a broken unit test for the OutboundAddress option: the parsing
12859 function was never returning an error on failure. Fixes bug 23366;
12860 bugfix on 0.3.0.3-alpha.
12861 - Fix a signed-integer overflow in the unit tests for
12862 dir/download_status_random_backoff, which was untriggered until we
12863 fixed bug 17750. Fixes bug 22924; bugfix on 0.2.9.1-alpha.
12865 o Minor bugfixes (usability, control port):
12866 - Stop making an unnecessary routerlist check in NETINFO clock skew
12867 detection; this was preventing clients from reporting NETINFO clock
12868 skew to controllers. Fixes bug 23532; bugfix on 0.2.4.4-alpha.
12870 o Code simplification and refactoring:
12871 - Extract the code for handling newly-open channels into a separate
12872 function from the general code to handle channel state
12873 transitions. This change simplifies our callgraph, reducing the
12874 size of the largest strongly connected component by roughly a
12875 factor of two. Closes ticket 22608.
12876 - Remove dead code for largely unused statistics on the number of
12877 times we've attempted various public key operations. Fixes bug
12878 19871; bugfix on 0.1.2.4-alpha. Fix by Isis Lovecruft.
12879 - Remove several now-obsolete functions for asking about old
12880 variants directory authority status. Closes ticket 22311; patch
12882 - Remove some of the code that once supported "Named" and "Unnamed"
12883 routers. Authorities no longer vote for these flags. Closes
12885 - Rename the obsolete malleable hybrid_encrypt functions used in TAP
12886 and old hidden services, to indicate that they aren't suitable for
12887 new protocols or formats. Closes ticket 23026.
12888 - Replace our STRUCT_OFFSET() macro with offsetof(). Closes ticket
12889 22521. Patch from Neel Chauhan.
12890 - Split the enormous circuit_send_next_onion_skin() function into
12891 multiple subfunctions. Closes ticket 22804.
12892 - Split the portions of the buffer.c module that handle particular
12893 protocols into separate modules. Part of ticket 23149.
12894 - Use our test macros more consistently, to produce more useful
12895 error messages when our unit tests fail. Add coccinelle patches to
12896 allow us to re-check for test macro uses. Closes ticket 22497.
12898 o Deprecated features:
12899 - Deprecate HTTPProxy/HTTPProxyAuthenticator config options. They
12900 only applies to direct unencrypted HTTP connections to your
12901 directory server, which your Tor probably isn't using. Closes
12905 - Clarify in the manual that "Sandbox 1" is only supported on Linux
12906 kernels. Closes ticket 22677.
12907 - Document all values of PublishServerDescriptor in the manpage.
12908 Closes ticket 15645.
12909 - Improve the documentation for the directory port part of the
12910 DirAuthority line. Closes ticket 20152.
12911 - Restore documentation for the authorities' "approved-routers"
12912 file. Closes ticket 21148.
12914 o Removed features:
12915 - The AllowDotExit option has been removed as unsafe. It has been
12916 deprecated since 0.2.9.2-alpha. Closes ticket 23426.
12917 - The ClientDNSRejectInternalAddresses flag can no longer be set on
12918 non-testing networks. It has been deprecated since 0.2.9.2-alpha.
12919 Closes ticket 21031.
12920 - The controller API no longer includes an AUTHDIR_NEWDESCS event:
12921 nobody was using it any longer. Closes ticket 22377.
12924 Changes in version 0.2.8.15 - 2017-09-18
12925 Tor 0.2.8.15 backports a collection of bugfixes from later
12928 Most significantly, it includes a fix for TROVE-2017-008, a
12929 security bug that affects hidden services running with the
12930 SafeLogging option disabled. For more information, see
12931 https://trac.torproject.org/projects/tor/ticket/23490
12933 Note that Tor 0.2.8.x will no longer be supported after 1 Jan
12934 2018. We suggest that you upgrade to the latest stable release if
12935 possible. If you can't, we recommend that you upgrade at least to
12936 0.2.9, which will be supported until 2020.
12938 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
12939 - Avoid an assertion failure bug affecting our implementation of
12940 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
12941 handling of "0xx" differs from what we had expected. Fixes bug
12942 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
12945 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
12948 o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
12949 - Backport a fix for an "unused variable" warning that appeared
12950 in some versions of mingw. Fixes bug 22838; bugfix on
12953 o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
12954 - Fix a memset() off the end of an array when packing cells. This
12955 bug should be harmless in practice, since the corrupted bytes are
12956 still in the same structure, and are always padding bytes,
12957 ignored, or immediately overwritten, depending on compiler
12958 behavior. Nevertheless, because the memset()'s purpose is to make
12959 sure that any other cell-handling bugs can't expose bytes to the
12960 network, we need to fix it. Fixes bug 22737; bugfix on
12961 0.2.4.11-alpha. Fixes CID 1401591.
12963 o Build features (backport from 0.3.1.5-alpha):
12964 - Tor's repository now includes a Travis Continuous Integration (CI)
12965 configuration file (.travis.yml). This is meant to help new
12966 developers and contributors who fork Tor to a Github repository be
12967 better able to test their changes, and understand what we expect
12968 to pass. To use this new build feature, you must fork Tor to your
12969 Github account, then go into the "Integrations" menu in the
12970 repository settings for your fork and enable Travis, then push
12971 your changes. Closes ticket 22636.
12974 Changes in version 0.2.9.12 - 2017-09-18
12975 Tor 0.2.9.12 backports a collection of bugfixes from later
12978 Most significantly, it includes a fix for TROVE-2017-008, a
12979 security bug that affects hidden services running with the
12980 SafeLogging option disabled. For more information, see
12981 https://trac.torproject.org/projects/tor/ticket/23490
12983 o Major features (security, backport from 0.3.0.2-alpha):
12984 - Change the algorithm used to decide DNS TTLs on client and server
12985 side, to better resist DNS-based correlation attacks like the
12986 DefecTor attack of Greschbach, Pulls, Roberts, Winter, and
12987 Feamster. Now relays only return one of two possible DNS TTL
12988 values, and clients are willing to believe DNS TTL values up to 3
12989 hours long. Closes ticket 19769.
12991 o Major bugfixes (crash, directory connections, backport from 0.3.0.5-rc):
12992 - Fix a rare crash when sending a begin cell on a circuit whose
12993 linked directory connection had already been closed. Fixes bug
12994 21576; bugfix on 0.2.9.3-alpha. Reported by Alec Muffett.
12996 o Major bugfixes (DNS, backport from 0.3.0.2-alpha):
12997 - Fix a bug that prevented exit nodes from caching DNS records for
12998 more than 60 seconds. Fixes bug 19025; bugfix on 0.2.4.7-alpha.
13000 o Major bugfixes (linux TPROXY support, backport from 0.3.1.1-alpha):
13001 - Fix a typo that had prevented TPROXY-based transparent proxying
13002 from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
13003 Patch from "d4fq0fQAgoJ".
13005 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
13006 - Avoid an assertion failure bug affecting our implementation of
13007 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
13008 handling of "0xx" differs from what we had expected. Fixes bug
13009 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
13011 o Minor features (code style, backport from 0.3.1.3-alpha):
13012 - Add "Falls through" comments to our codebase, in order to silence
13013 GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
13014 Stieger. Closes ticket 22446.
13016 o Minor features (geoip):
13017 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
13020 o Minor bugfixes (bandwidth accounting, backport from 0.3.1.1-alpha):
13021 - Roll over monthly accounting at the configured hour and minute,
13022 rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
13023 Found by Andrey Karpov with PVS-Studio.
13025 o Minor bugfixes (compilation, backport from 0.3.1.5-alpha):
13026 - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug 22915;
13027 bugfix on 0.2.8.1-alpha.
13028 - Fix warnings when building with libscrypt and openssl scrypt support
13029 on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
13030 - When building with certain versions the mingw C header files, avoid
13031 float-conversion warnings when calling the C functions isfinite(),
13032 isnan(), and signbit(). Fixes bug 22801; bugfix on 0.2.8.1-alpha.
13034 o Minor bugfixes (compilation, backport from 0.3.1.7):
13035 - Avoid compiler warnings in the unit tests for running tor_sscanf()
13036 with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
13038 o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
13039 - Backport a fix for an "unused variable" warning that appeared
13040 in some versions of mingw. Fixes bug 22838; bugfix on
13043 o Minor bugfixes (controller, backport from 0.3.1.7):
13044 - Do not crash when receiving a HSPOST command with an empty body.
13045 Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
13046 - Do not crash when receiving a POSTDESCRIPTOR command with an
13047 empty body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
13049 o Minor bugfixes (coverity build support, backport from 0.3.1.5-alpha):
13050 - Avoid Coverity build warnings related to our BUG() macro. By
13051 default, Coverity treats BUG() as the Linux kernel does: an
13052 instant abort(). We need to override that so our BUG() macro
13053 doesn't prevent Coverity from analyzing functions that use it.
13054 Fixes bug 23030; bugfix on 0.2.9.1-alpha.
13056 o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
13057 - Fix a memset() off the end of an array when packing cells. This
13058 bug should be harmless in practice, since the corrupted bytes are
13059 still in the same structure, and are always padding bytes,
13060 ignored, or immediately overwritten, depending on compiler
13061 behavior. Nevertheless, because the memset()'s purpose is to make
13062 sure that any other cell-handling bugs can't expose bytes to the
13063 network, we need to fix it. Fixes bug 22737; bugfix on
13064 0.2.4.11-alpha. Fixes CID 1401591.
13066 o Minor bugfixes (file limits, osx, backport from 0.3.1.5-alpha):
13067 - When setting the maximum number of connections allowed by the OS,
13068 always allow some extra file descriptors for other files. Fixes
13069 bug 22797; bugfix on 0.2.0.10-alpha.
13071 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.5-alpha):
13072 - Avoid a sandbox failure when trying to re-bind to a socket and
13073 mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
13075 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.4-alpha):
13076 - Permit the fchmod system call, to avoid crashing on startup when
13077 starting with the seccomp2 sandbox and an unexpected set of
13078 permissions on the data directory or its contents. Fixes bug
13079 22516; bugfix on 0.2.5.4-alpha.
13081 o Minor bugfixes (relay, backport from 0.3.0.5-rc):
13082 - Avoid a double-marked-circuit warning that could happen when we
13083 receive DESTROY cells under heavy load. Fixes bug 20059; bugfix
13086 o Minor bugfixes (voting consistency, backport from 0.3.1.1-alpha):
13087 - Reject version numbers with non-numeric prefixes (such as +, -, or
13088 whitespace). Disallowing whitespace prevents differential version
13089 parsing between POSIX-based and Windows platforms. Fixes bug 21507
13090 and part of 21508; bugfix on 0.0.8pre1.
13092 o Build features (backport from 0.3.1.5-alpha):
13093 - Tor's repository now includes a Travis Continuous Integration (CI)
13094 configuration file (.travis.yml). This is meant to help new
13095 developers and contributors who fork Tor to a Github repository be
13096 better able to test their changes, and understand what we expect
13097 to pass. To use this new build feature, you must fork Tor to your
13098 Github account, then go into the "Integrations" menu in the
13099 repository settings for your fork and enable Travis, then push
13100 your changes. Closes ticket 22636.
13103 Changes in version 0.3.0.11 - 2017-09-18
13104 Tor 0.3.0.11 backports a collection of bugfixes from Tor the 0.3.1
13107 Most significantly, it includes a fix for TROVE-2017-008, a
13108 security bug that affects hidden services running with the
13109 SafeLogging option disabled. For more information, see
13110 https://trac.torproject.org/projects/tor/ticket/23490
13112 o Minor features (code style, backport from 0.3.1.7):
13113 - Add "Falls through" comments to our codebase, in order to silence
13114 GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
13115 Stieger. Closes ticket 22446.
13118 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
13121 o Minor bugfixes (compilation, backport from 0.3.1.7):
13122 - Avoid compiler warnings in the unit tests for calling tor_sscanf()
13123 with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
13125 o Minor bugfixes (controller, backport from 0.3.1.7):
13126 - Do not crash when receiving a HSPOST command with an empty body.
13127 Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
13128 - Do not crash when receiving a POSTDESCRIPTOR command with an empty
13129 body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
13131 o Minor bugfixes (file limits, osx, backport from 0.3.1.5-alpha):
13132 - When setting the maximum number of connections allowed by the OS,
13133 always allow some extra file descriptors for other files. Fixes
13134 bug 22797; bugfix on 0.2.0.10-alpha.
13136 o Minor bugfixes (logging, relay, backport from 0.3.1.6-rc):
13137 - Remove a forgotten debugging message when an introduction point
13138 successfully establishes a hidden service prop224 circuit with
13140 - Change three other log_warn() for an introduction point to
13141 protocol warnings, because they can be failure from the network
13142 and are not relevant to the operator. Fixes bug 23078; bugfix on
13143 0.3.0.1-alpha and 0.3.0.2-alpha.
13146 Changes in version 0.3.1.7 - 2017-09-18
13147 Tor 0.3.1.7 is the first stable release in the 0.3.1 series.
13149 With the 0.3.1 series, Tor now serves and downloads directory
13150 information in more compact formats, to save on bandwidth overhead. It
13151 also contains a new padding system to resist netflow-based traffic
13152 analysis, and experimental support for building parts of Tor in Rust
13153 (though no parts of Tor are in Rust yet). There are also numerous
13154 small features, bugfixes on earlier release series, and groundwork for
13155 the hidden services revamp of 0.3.2.
13157 This release also includes a fix for TROVE-2017-008, a security bug
13158 that affects hidden services running with the SafeLogging option
13159 disabled. For more information, see
13160 https://trac.torproject.org/projects/tor/ticket/23490
13162 Per our stable release policy, we plan to support each stable release
13163 series for at least the next nine months, or for three months after
13164 the first stable release of the next series: whichever is longer. If
13165 you need a release with long-term support, we recommend that you stay
13166 with the 0.2.9 series.
13168 Below is a list of the changes since 0.3.1.6-rc. For a list of all
13169 changes since 0.3.0, see the ReleaseNotes file.
13171 o Major bugfixes (security, hidden services, loggging):
13172 - Fix a bug where we could log uninitialized stack when a certain
13173 hidden service error occurred while SafeLogging was disabled.
13174 Fixes bug #23490; bugfix on 0.2.7.2-alpha. This is also tracked as
13175 TROVE-2017-008 and CVE-2017-0380.
13177 o Minor features (defensive programming):
13178 - Create a pair of consensus parameters, nf_pad_tor2web and
13179 nf_pad_single_onion, to disable netflow padding in the consensus
13180 for non-anonymous connections in case the overhead is high. Closes
13183 o Minor features (diagnostic):
13184 - Add a stack trace to the bug warnings that can be logged when
13185 trying to send an outgoing relay cell with n_chan == 0. Diagnostic
13186 attempt for bug 23105.
13188 o Minor features (geoip):
13189 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
13192 o Minor bugfixes (compilation):
13193 - Avoid compiler warnings in the unit tests for calling tor_sscanf()
13194 with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
13196 o Minor bugfixes (controller):
13197 - Do not crash when receiving a HSPOST command with an empty body.
13198 Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
13199 - Do not crash when receiving a POSTDESCRIPTOR command with an empty
13200 body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
13202 o Minor bugfixes (relay):
13203 - Inform the geoip and rephist modules about all requests, even on
13204 relays that are only fetching microdescriptors. Fixes a bug
13205 related to 21585; bugfix on 0.3.0.1-alpha.
13207 o Minor bugfixes (unit tests):
13208 - Fix a channelpadding unit test failure on slow systems by using
13209 mocked time instead of actual time. Fixes bug 23077; bugfix
13213 Changes in version 0.3.1.6-rc - 2017-09-05
13214 Tor 0.3.1.6-rc fixes a few small bugs and annoyances in the 0.3.1
13215 release series, including a bug that produced weird behavior on
13216 Windows directory caches.
13218 This is the first release candidate in the Tor 0.3.1 series. If we
13219 find no new bugs or regressions here, the first stable 0.3.1 release
13220 will be nearly identical to it.
13222 o Major bugfixes (windows, directory cache):
13223 - On Windows, do not try to delete cached consensus documents and
13224 diffs before they are unmapped from memory--Windows won't allow
13225 that. Instead, allow the consensus cache directory to grow larger,
13226 to hold files that might need to stay around longer. Fixes bug
13227 22752; bugfix on 0.3.1.1-alpha.
13229 o Minor features (directory authority):
13230 - Improve the message that authorities report to relays that present
13231 RSA/Ed25519 keypairs that conflict with previously pinned keys.
13232 Closes ticket 22348.
13234 o Minor features (geoip):
13235 - Update geoip and geoip6 to the August 3 2017 Maxmind GeoLite2
13238 o Minor features (testing):
13239 - Add more tests for compression backend initialization. Closes
13242 o Minor bugfixes (directory cache):
13243 - Fix a memory leak when recovering space in the consensus cache.
13244 Fixes bug 23139; bugfix on 0.3.1.1-alpha.
13246 o Minor bugfixes (hidden service):
13247 - Increase the number of circuits that a service is allowed to
13248 open over a specific period of time. The value was lower than it
13249 should be (8 vs 12) in the normal case of 3 introduction points.
13250 Fixes bug 22159; bugfix on 0.3.0.5-rc.
13251 - Fix a BUG warning during HSv3 descriptor decoding that could be
13252 cause by a specially crafted descriptor. Fixes bug 23233; bugfix
13253 on 0.3.0.1-alpha. Bug found by "haxxpop".
13254 - Rate-limit the log messages if we exceed the maximum number of
13255 allowed intro circuits. Fixes bug 22159; bugfix on 0.3.1.1-alpha.
13257 o Minor bugfixes (logging, relay):
13258 - Remove a forgotten debugging message when an introduction point
13259 successfully establishes a hidden service prop224 circuit with
13261 - Change three other log_warn() for an introduction point to
13262 protocol warnings, because they can be failure from the network
13263 and are not relevant to the operator. Fixes bug 23078; bugfix on
13264 0.3.0.1-alpha and 0.3.0.2-alpha.
13266 o Minor bugfixes (relay):
13267 - When a relay is not running as a directory cache, it will no
13268 longer generate compressed consensuses and consensus diff
13269 information. Previously, this was a waste of disk and CPU. Fixes
13270 bug 23275; bugfix on 0.3.1.1-alpha.
13272 o Minor bugfixes (robustness, error handling):
13273 - Improve our handling of the cases where OpenSSL encounters a
13274 memory error while encoding keys and certificates. We haven't
13275 observed these errors in the wild, but if they do happen, we now
13276 detect and respond better. Fixes bug 19418; bugfix on all versions
13277 of Tor. Reported by Guido Vranken.
13279 o Minor bugfixes (stability):
13280 - Avoid crashing on a double-free when unable to load or process an
13281 included file. Fixes bug 23155; bugfix on 0.3.1.1-alpha. Found
13282 with the clang static analyzer.
13284 o Minor bugfixes (testing):
13285 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
13286 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
13287 - Port the hs_ntor handshake test to work correctly with recent
13288 versions of the pysha3 module. Fixes bug 23071; bugfix
13291 o Minor bugfixes (Windows service):
13292 - When running as a Windows service, set the ID of the main thread
13293 correctly. Failure to do so made us fail to send log messages to
13294 the controller in 0.2.1.16-rc, slowed down controller event
13295 delivery in 0.2.7.3-rc and later, and crash with an assertion
13296 failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
13297 Patch and diagnosis from "Vort".
13300 Changes in version 0.3.0.10 - 2017-08-02
13301 Tor 0.3.0.10 backports a collection of small-to-medium bugfixes
13302 from the current Tor alpha series. OpenBSD users and TPROXY users
13303 should upgrade; others are probably okay sticking with 0.3.0.9.
13305 o Major features (build system, continuous integration, backport from 0.3.1.5-alpha):
13306 - Tor's repository now includes a Travis Continuous Integration (CI)
13307 configuration file (.travis.yml). This is meant to help new
13308 developers and contributors who fork Tor to a Github repository be
13309 better able to test their changes, and understand what we expect
13310 to pass. To use this new build feature, you must fork Tor to your
13311 Github account, then go into the "Integrations" menu in the
13312 repository settings for your fork and enable Travis, then push
13313 your changes. Closes ticket 22636.
13315 o Major bugfixes (linux TPROXY support, backport from 0.3.1.1-alpha):
13316 - Fix a typo that had prevented TPROXY-based transparent proxying
13317 from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
13318 Patch from "d4fq0fQAgoJ".
13320 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
13321 - Avoid an assertion failure bug affecting our implementation of
13322 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
13323 handling of "0xbar" differs from what we had expected. Fixes bug
13324 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
13326 o Minor features (backport from 0.3.1.5-alpha):
13327 - Update geoip and geoip6 to the July 4 2017 Maxmind GeoLite2
13330 o Minor bugfixes (bandwidth accounting, backport from 0.3.1.2-alpha):
13331 - Roll over monthly accounting at the configured hour and minute,
13332 rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
13333 Found by Andrey Karpov with PVS-Studio.
13335 o Minor bugfixes (compilation warnings, backport from 0.3.1.5-alpha):
13336 - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug 22915;
13337 bugfix on 0.2.8.1-alpha.
13338 - Fix warnings when building with libscrypt and openssl scrypt
13339 support on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
13340 - When building with certain versions of the mingw C header files,
13341 avoid float-conversion warnings when calling the C functions
13342 isfinite(), isnan(), and signbit(). Fixes bug 22801; bugfix
13345 o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
13346 - Backport a fix for an "unused variable" warning that appeared
13347 in some versions of mingw. Fixes bug 22838; bugfix on
13350 o Minor bugfixes (coverity build support, backport from 0.3.1.5-alpha):
13351 - Avoid Coverity build warnings related to our BUG() macro. By
13352 default, Coverity treats BUG() as the Linux kernel does: an
13353 instant abort(). We need to override that so our BUG() macro
13354 doesn't prevent Coverity from analyzing functions that use it.
13355 Fixes bug 23030; bugfix on 0.2.9.1-alpha.
13357 o Minor bugfixes (directory authority, backport from 0.3.1.1-alpha):
13358 - When rejecting a router descriptor for running an obsolete version
13359 of Tor without ntor support, warn about the obsolete tor version,
13360 not the missing ntor key. Fixes bug 20270; bugfix on 0.2.9.3-alpha.
13362 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.5-alpha):
13363 - Avoid a sandbox failure when trying to re-bind to a socket and
13364 mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
13366 o Minor bugfixes (unit tests, backport from 0.3.1.5-alpha)
13367 - Fix a memory leak in the link-handshake/certs_ok_ed25519 test.
13368 Fixes bug 22803; bugfix on 0.3.0.1-alpha.
13371 Changes in version 0.3.1.5-alpha - 2017-08-01
13372 Tor 0.3.1.5-alpha improves the performance of consensus diff
13373 calculation, fixes a crash bug on older versions of OpenBSD, and fixes
13374 several other bugs. If no serious bugs are found in this version, the
13375 next version will be a release candidate.
13377 This release also marks the end of support for the Tor 0.2.4.x,
13378 0.2.6.x, and 0.2.7.x release series. Those releases will receive no
13379 further bug or security fixes. Anyone still running or distributing
13380 one of those versions should upgrade.
13382 o Major features (build system, continuous integration):
13383 - Tor's repository now includes a Travis Continuous Integration (CI)
13384 configuration file (.travis.yml). This is meant to help new
13385 developers and contributors who fork Tor to a Github repository be
13386 better able to test their changes, and understand what we expect
13387 to pass. To use this new build feature, you must fork Tor to your
13388 Github account, then go into the "Integrations" menu in the
13389 repository settings for your fork and enable Travis, then push
13390 your changes. Closes ticket 22636.
13392 o Major bugfixes (openbsd, denial-of-service):
13393 - Avoid an assertion failure bug affecting our implementation of
13394 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
13395 handling of "0xbar" differs from what we had expected. Fixes bug
13396 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
13398 o Major bugfixes (relay, performance):
13399 - Perform circuit handshake operations at a higher priority than we
13400 use for consensus diff creation and compression. This should
13401 prevent circuits from starving when a relay or bridge receives a
13402 new consensus, especially on lower-powered machines. Fixes bug
13403 22883; bugfix on 0.3.1.1-alpha.
13405 o Minor features (bridge authority):
13406 - Add "fingerprint" lines to the networkstatus-bridges file produced
13407 by bridge authorities. Closes ticket 22207.
13409 o Minor features (directory cache, consensus diff):
13410 - Add a new MaxConsensusAgeForDiffs option to allow directory cache
13411 operators with low-resource environments to adjust the number of
13412 consensuses they'll store and generate diffs from. Most cache
13413 operators should leave it unchanged. Helps to work around
13416 o Minor features (geoip):
13417 - Update geoip and geoip6 to the July 4 2017 Maxmind GeoLite2
13420 o Minor features (relay, performance):
13421 - Always start relays with at least two worker threads, to prevent
13422 priority inversion on slow tasks. Part of the fix for bug 22883.
13423 - Allow background work to be queued with different priorities, so
13424 that a big pile of slow low-priority jobs will not starve out
13425 higher priority jobs. This lays the groundwork for a fix for
13428 o Minor bugfixes (build system, rust):
13429 - Fix a problem where Rust toolchains were not being found when
13430 building without --enable-cargo-online-mode, due to setting the
13431 $HOME environment variable instead of $CARGO_HOME. Fixes bug
13432 22830; bugfix on 0.3.1.1-alpha. Fix by Chelsea Komlo.
13434 o Minor bugfixes (compatibility, zstd):
13435 - Write zstd epilogues correctly when the epilogue requires
13436 reallocation of the output buffer, even with zstd 1.3.0.
13437 (Previously, we worked on 1.2.0 and failed with 1.3.0). Fixes bug
13438 22927; bugfix on 0.3.1.1-alpha.
13440 o Minor bugfixes (compilation warnings):
13441 - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug
13442 22915; bugfix on 0.2.8.1-alpha.
13443 - Fix warnings when building with libscrypt and openssl scrypt
13444 support on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
13445 - Compile correctly when both openssl 1.1.0 and libscrypt are
13446 detected. Previously this would cause an error. Fixes bug 22892;
13447 bugfix on 0.3.1.1-alpha.
13448 - When building with certain versions of the mingw C header files,
13449 avoid float-conversion warnings when calling the C functions
13450 isfinite(), isnan(), and signbit(). Fixes bug 22801; bugfix
13453 o Minor bugfixes (coverity build support):
13454 - Avoid Coverity build warnings related to our BUG() macro. By
13455 default, Coverity treats BUG() as the Linux kernel does: an
13456 instant abort(). We need to override that so our BUG() macro
13457 doesn't prevent Coverity from analyzing functions that use it.
13458 Fixes bug 23030; bugfix on 0.2.9.1-alpha.
13460 o Minor bugfixes (directory authority):
13461 - When a directory authority rejects a descriptor or extrainfo with
13462 a given digest, mark that digest as undownloadable, so that we do
13463 not attempt to download it again over and over. We previously
13464 tried to avoid downloading such descriptors by other means, but we
13465 didn't notice if we accidentally downloaded one anyway. This
13466 behavior became problematic in 0.2.7.2-alpha, when authorities
13467 began pinning Ed25519 keys. Fixes bug 22349; bugfix
13470 o Minor bugfixes (error reporting, windows):
13471 - When formatting Windows error messages, use the English format to
13472 avoid codepage issues. Fixes bug 22520; bugfix on 0.1.2.8-alpha.
13475 o Minor bugfixes (file limits, osx):
13476 - When setting the maximum number of connections allowed by the OS,
13477 always allow some extra file descriptors for other files. Fixes
13478 bug 22797; bugfix on 0.2.0.10-alpha.
13480 o Minor bugfixes (linux seccomp2 sandbox):
13481 - Avoid a sandbox failure when trying to re-bind to a socket and
13482 mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
13484 o Minor bugfixes (memory leaks):
13485 - Fix a small memory leak when validating a configuration that uses
13486 two or more AF_UNIX sockets for the same port type. Fixes bug
13487 23053; bugfix on 0.2.6.3-alpha. This is CID 1415725.
13489 o Minor bugfixes (unit tests):
13490 - test_consdiff_base64cmp would fail on OS X because while OS X
13491 follows the standard of (less than zero/zero/greater than zero),
13492 it doesn't follow the convention of (-1/0/+1). Make the test
13493 comply with the standard. Fixes bug 22870; bugfix on 0.3.1.1-alpha.
13494 - Fix a memory leak in the link-handshake/certs_ok_ed25519 test.
13495 Fixes bug 22803; bugfix on 0.3.0.1-alpha.
13498 Changes in version 0.3.1.4-alpha - 2017-06-29
13499 Tor 0.3.1.4-alpha fixes a path selection bug that would allow a client
13500 to use a guard that was in the same network family as a chosen exit
13501 relay. This is a security regression; all clients running earlier
13502 versions of 0.3.0.x or 0.3.1.x should upgrade to 0.3.0.9
13505 This release also fixes several other bugs introduced in 0.3.0.x
13506 and 0.3.1.x, including others that can affect bandwidth usage
13509 o New dependencies:
13510 - To build with zstd and lzma support, Tor now requires the
13511 pkg-config tool at build time. (This requirement was new in
13512 0.3.1.1-alpha, but was not noted at the time. Noting it here to
13513 close ticket 22623.)
13515 o Major bugfixes (path selection, security):
13516 - When choosing which guard to use for a circuit, avoid the exit's
13517 family along with the exit itself. Previously, the new guard
13518 selection logic avoided the exit, but did not consider its family.
13519 Fixes bug 22753; bugfix on 0.3.0.1-alpha. Tracked as TROVE-2017-
13520 006 and CVE-2017-0377.
13522 o Major bugfixes (compression, zstd):
13523 - Correctly detect a full buffer when decompressing a large zstd-
13524 compressed input. Previously, we would sometimes treat a full
13525 buffer as an error. Fixes bug 22628; bugfix on 0.3.1.1-alpha.
13527 o Major bugfixes (directory protocol):
13528 - Ensure that we send "304 Not modified" as HTTP status code when a
13529 client is attempting to fetch a consensus or consensus diff, and
13530 the best one we can send them is one they already have. Fixes bug
13531 22702; bugfix on 0.3.1.1-alpha.
13533 o Major bugfixes (entry guards):
13534 - When starting with an old consensus, do not add new entry guards
13535 unless the consensus is "reasonably live" (under 1 day old). Fixes
13536 one root cause of bug 22400; bugfix on 0.3.0.1-alpha.
13538 o Minor features (bug mitigation, diagnostics, logging):
13539 - Avoid an assertion failure, and log a better error message, when
13540 unable to remove a file from the consensus cache on Windows.
13541 Attempts to mitigate and diagnose bug 22752.
13543 o Minor features (geoip):
13544 - Update geoip and geoip6 to the June 8 2017 Maxmind GeoLite2
13547 o Minor bugfixes (compression):
13548 - When compressing or decompressing a buffer, check for a failure to
13549 create a compression object. Fixes bug 22626; bugfix
13551 - When decompressing a buffer, check for extra data after the end of
13552 the compressed data. Fixes bug 22629; bugfix on 0.3.1.1-alpha.
13553 - When decompressing an object received over an anonymous directory
13554 connection, if we have already decompressed it using an acceptable
13555 compression method, do not reject it for looking like an
13556 unacceptable compression method. Fixes part of bug 22670; bugfix
13558 - When serving directory votes compressed with zlib, do not claim to
13559 have compressed them with zstd. Fixes bug 22669; bugfix
13561 - When spooling compressed data to an output buffer, don't try to
13562 spool more data when there is no more data to spool and we are not
13563 trying to flush the input. Previously, we would sometimes launch
13564 compression requests with nothing to do, which interferes with our
13565 22672 checks. Fixes bug 22719; bugfix on 0.2.0.16-alpha.
13567 o Minor bugfixes (defensive programming):
13568 - Detect and break out of infinite loops in our compression code. We
13569 don't think that any such loops exist now, but it's best to be
13570 safe. Closes ticket 22672.
13571 - Fix a memset() off the end of an array when packing cells. This
13572 bug should be harmless in practice, since the corrupted bytes are
13573 still in the same structure, and are always padding bytes,
13574 ignored, or immediately overwritten, depending on compiler
13575 behavior. Nevertheless, because the memset()'s purpose is to make
13576 sure that any other cell-handling bugs can't expose bytes to the
13577 network, we need to fix it. Fixes bug 22737; bugfix on
13578 0.2.4.11-alpha. Fixes CID 1401591.
13580 o Minor bugfixes (linux seccomp2 sandbox):
13581 - Permit the fchmod system call, to avoid crashing on startup when
13582 starting with the seccomp2 sandbox and an unexpected set of
13583 permissions on the data directory or its contents. Fixes bug
13584 22516; bugfix on 0.2.5.4-alpha.
13585 - Fix a crash in the LZMA module, when the sandbox was enabled, and
13586 liblzma would allocate more than 16 MB of memory. We solve this by
13587 bumping the mprotect() limit in the sandbox module from 16 MB to
13588 20 MB. Fixes bug 22751; bugfix on 0.3.1.1-alpha.
13590 o Minor bugfixes (logging):
13591 - When decompressing, do not warn if we fail to decompress using a
13592 compression method that we merely guessed. Fixes part of bug
13593 22670; bugfix on 0.1.1.14-alpha.
13594 - When decompressing, treat mismatch between content-encoding and
13595 actual compression type as a protocol warning. Fixes part of bug
13596 22670; bugfix on 0.1.1.9-alpha.
13597 - Downgrade "assigned_to_cpuworker failed" message to info-level
13598 severity. In every case that can reach it, either a better warning
13599 has already been logged, or no warning is warranted. Fixes bug
13600 22356; bugfix on 0.2.6.3-alpha.
13601 - Demote a warn that was caused by libevent delays to info if
13602 netflow padding is less than 4.5 seconds late, or to notice
13603 if it is more (4.5 seconds is the amount of time that a netflow
13604 record might be emitted after, if we chose the maximum timeout).
13605 Fixes bug 22212; bugfix on 0.3.1.1-alpha.
13607 o Minor bugfixes (process behavior):
13608 - When exiting because of an error, always exit with a nonzero exit
13609 status. Previously, we would fail to report an error in our exit
13610 status in cases related to __OwningControllerProcess failure,
13611 lockfile contention, and Ed25519 key initialization. Fixes bug
13612 22720; bugfix on versions 0.2.1.6-alpha, 0.2.2.28-beta, and
13613 0.2.7.2-alpha respectively. Reported by "f55jwk4f"; patch
13617 - Add a manpage description for the key-pinning-journal file. Closes
13619 - Correctly note that bandwidth accounting values are stored in the
13620 state file, and the bw_accounting file is now obsolete. Closes
13622 - Document more of the files in the Tor data directory, including
13623 cached-extrainfo, secret_onion_key{,_ntor}.old, hidserv-stats,
13624 approved-routers, sr-random, and diff-cache. Found while fixing
13628 Changes in version 0.3.0.9 - 2017-06-29
13629 Tor 0.3.0.9 fixes a path selection bug that would allow a client
13630 to use a guard that was in the same network family as a chosen exit
13631 relay. This is a security regression; all clients running earlier
13632 versions of 0.3.0.x or 0.3.1.x should upgrade to 0.3.0.9 or
13635 This release also backports several other bugfixes from the 0.3.1.x
13638 o Major bugfixes (path selection, security, backport from 0.3.1.4-alpha):
13639 - When choosing which guard to use for a circuit, avoid the exit's
13640 family along with the exit itself. Previously, the new guard
13641 selection logic avoided the exit, but did not consider its family.
13642 Fixes bug 22753; bugfix on 0.3.0.1-alpha. Tracked as TROVE-2017-
13643 006 and CVE-2017-0377.
13645 o Major bugfixes (entry guards, backport from 0.3.1.1-alpha):
13646 - Don't block bootstrapping when a primary bridge is offline and we
13647 can't get its descriptor. Fixes bug 22325; fixes one case of bug
13648 21969; bugfix on 0.3.0.3-alpha.
13650 o Major bugfixes (entry guards, backport from 0.3.1.4-alpha):
13651 - When starting with an old consensus, do not add new entry guards
13652 unless the consensus is "reasonably live" (under 1 day old). Fixes
13653 one root cause of bug 22400; bugfix on 0.3.0.1-alpha.
13655 o Minor features (geoip):
13656 - Update geoip and geoip6 to the June 8 2017 Maxmind GeoLite2
13659 o Minor bugfixes (voting consistency, backport from 0.3.1.1-alpha):
13660 - Reject version numbers with non-numeric prefixes (such as +, -, or
13661 whitespace). Disallowing whitespace prevents differential version
13662 parsing between POSIX-based and Windows platforms. Fixes bug 21507
13663 and part of 21508; bugfix on 0.0.8pre1.
13665 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.4-alpha):
13666 - Permit the fchmod system call, to avoid crashing on startup when
13667 starting with the seccomp2 sandbox and an unexpected set of
13668 permissions on the data directory or its contents. Fixes bug
13669 22516; bugfix on 0.2.5.4-alpha.
13671 o Minor bugfixes (defensive programming, backport from 0.3.1.4-alpha):
13672 - Fix a memset() off the end of an array when packing cells. This
13673 bug should be harmless in practice, since the corrupted bytes are
13674 still in the same structure, and are always padding bytes,
13675 ignored, or immediately overwritten, depending on compiler
13676 behavior. Nevertheless, because the memset()'s purpose is to make
13677 sure that any other cell-handling bugs can't expose bytes to the
13678 network, we need to fix it. Fixes bug 22737; bugfix on
13679 0.2.4.11-alpha. Fixes CID 1401591.
13682 Changes in version 0.3.1.3-alpha - 2017-06-08
13683 Tor 0.3.1.3-alpha fixes a pair of bugs that would allow an attacker to
13684 remotely crash a hidden service with an assertion failure. Anyone
13685 running a hidden service should upgrade to this version, or to some
13686 other version with fixes for TROVE-2017-004 and TROVE-2017-005.
13688 Tor 0.3.1.3-alpha also includes fixes for several key management bugs
13689 that sometimes made relays unreliable, as well as several other
13690 bugfixes described below.
13692 o Major bugfixes (hidden service, relay, security):
13693 - Fix a remotely triggerable assertion failure when a hidden service
13694 handles a malformed BEGIN cell. Fixes bug 22493, tracked as
13695 TROVE-2017-004 and as CVE-2017-0375; bugfix on 0.3.0.1-alpha.
13696 - Fix a remotely triggerable assertion failure caused by receiving a
13697 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
13698 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
13701 o Major bugfixes (relay, link handshake):
13702 - When performing the v3 link handshake on a TLS connection, report
13703 that we have the x509 certificate that we actually used on that
13704 connection, even if we have changed certificates since that
13705 connection was first opened. Previously, we would claim to have
13706 used our most recent x509 link certificate, which would sometimes
13707 make the link handshake fail. Fixes one case of bug 22460; bugfix
13710 o Major bugfixes (relays, key management):
13711 - Regenerate link and authentication certificates whenever the key
13712 that signs them changes; also, regenerate link certificates
13713 whenever the signed key changes. Previously, these processes were
13714 only weakly coupled, and we relays could (for minutes to hours)
13715 wind up with an inconsistent set of keys and certificates, which
13716 other relays would not accept. Fixes two cases of bug 22460;
13717 bugfix on 0.3.0.1-alpha.
13718 - When sending an Ed25519 signing->link certificate in a CERTS cell,
13719 send the certificate that matches the x509 certificate that we
13720 used on the TLS connection. Previously, there was a race condition
13721 if the TLS context rotated after we began the TLS handshake but
13722 before we sent the CERTS cell. Fixes a case of bug 22460; bugfix
13725 o Major bugfixes (torrc, crash):
13726 - Fix a crash bug when using %include in torrc. Fixes bug 22417;
13727 bugfix on 0.3.1.1-alpha. Patch by Daniel Pinto.
13729 o Minor features (code style):
13730 - Add "Falls through" comments to our codebase, in order to silence
13731 GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
13732 Stieger. Closes ticket 22446.
13734 o Minor features (diagnostic):
13735 - Add logging messages to try to diagnose a rare bug that seems to
13736 generate RSA->Ed25519 cross-certificates dated in the 1970s. We
13737 think this is happening because of incorrect system clocks, but
13738 we'd like to know for certain. Diagnostic for bug 22466.
13740 o Minor bugfixes (correctness):
13741 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
13742 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
13744 o Minor bugfixes (directory protocol):
13745 - Check for libzstd >= 1.1, because older versions lack the
13746 necessary streaming API. Fixes bug 22413; bugfix on 0.3.1.1-alpha.
13748 o Minor bugfixes (link handshake):
13749 - Lower the lifetime of the RSA->Ed25519 cross-certificate to six
13750 months, and regenerate it when it is within one month of expiring.
13751 Previously, we had generated this certificate at startup with a
13752 ten-year lifetime, but that could lead to weird behavior when Tor
13753 was started with a grossly inaccurate clock. Mitigates bug 22466;
13754 mitigation on 0.3.0.1-alpha.
13756 o Minor bugfixes (storage directories):
13757 - Always check for underflows in the cached storage directory usage.
13758 If the usage does underflow, re-calculate it. Also, avoid a
13759 separate underflow when the usage is not known. Fixes bug 22424;
13760 bugfix on 0.3.1.1-alpha.
13762 o Minor bugfixes (unit tests):
13763 - The unit tests now pass on systems where localhost is misconfigured
13764 to some IPv4 address other than 127.0.0.1. Fixes bug 6298; bugfix
13768 - Clarify the manpage for the (deprecated) torify script. Closes
13771 Changes in version 0.3.0.8 - 2017-06-08
13772 Tor 0.3.0.8 fixes a pair of bugs that would allow an attacker to
13773 remotely crash a hidden service with an assertion failure. Anyone
13774 running a hidden service should upgrade to this version, or to some
13775 other version with fixes for TROVE-2017-004 and TROVE-2017-005.
13777 Tor 0.3.0.8 also includes fixes for several key management bugs
13778 that sometimes made relays unreliable, as well as several other
13779 bugfixes described below.
13781 o Major bugfixes (hidden service, relay, security, backport
13782 from 0.3.1.3-alpha):
13783 - Fix a remotely triggerable assertion failure when a hidden service
13784 handles a malformed BEGIN cell. Fixes bug 22493, tracked as
13785 TROVE-2017-004 and as CVE-2017-0375; bugfix on 0.3.0.1-alpha.
13786 - Fix a remotely triggerable assertion failure caused by receiving a
13787 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
13788 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
13791 o Major bugfixes (relay, link handshake, backport from 0.3.1.3-alpha):
13792 - When performing the v3 link handshake on a TLS connection, report
13793 that we have the x509 certificate that we actually used on that
13794 connection, even if we have changed certificates since that
13795 connection was first opened. Previously, we would claim to have
13796 used our most recent x509 link certificate, which would sometimes
13797 make the link handshake fail. Fixes one case of bug 22460; bugfix
13800 o Major bugfixes (relays, key management, backport from 0.3.1.3-alpha):
13801 - Regenerate link and authentication certificates whenever the key
13802 that signs them changes; also, regenerate link certificates
13803 whenever the signed key changes. Previously, these processes were
13804 only weakly coupled, and we relays could (for minutes to hours)
13805 wind up with an inconsistent set of keys and certificates, which
13806 other relays would not accept. Fixes two cases of bug 22460;
13807 bugfix on 0.3.0.1-alpha.
13808 - When sending an Ed25519 signing->link certificate in a CERTS cell,
13809 send the certificate that matches the x509 certificate that we
13810 used on the TLS connection. Previously, there was a race condition
13811 if the TLS context rotated after we began the TLS handshake but
13812 before we sent the CERTS cell. Fixes a case of bug 22460; bugfix
13815 o Major bugfixes (hidden service v3, backport from 0.3.1.1-alpha):
13816 - Stop rejecting v3 hidden service descriptors because their size
13817 did not match an old padding rule. Fixes bug 22447; bugfix on
13820 o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
13821 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
13822 December 2016 (of which ~126 were still functional) with a list of
13823 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
13824 2017. Resolves ticket 21564.
13826 o Minor bugfixes (configuration, backport from 0.3.1.1-alpha):
13827 - Do not crash when starting with LearnCircuitBuildTimeout 0. Fixes
13828 bug 22252; bugfix on 0.2.9.3-alpha.
13830 o Minor bugfixes (correctness, backport from 0.3.1.3-alpha):
13831 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
13832 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
13834 o Minor bugfixes (link handshake, backport from 0.3.1.3-alpha):
13835 - Lower the lifetime of the RSA->Ed25519 cross-certificate to six
13836 months, and regenerate it when it is within one month of expiring.
13837 Previously, we had generated this certificate at startup with a
13838 ten-year lifetime, but that could lead to weird behavior when Tor
13839 was started with a grossly inaccurate clock. Mitigates bug 22466;
13840 mitigation on 0.3.0.1-alpha.
13842 o Minor bugfixes (memory leak, directory authority, backport from
13844 - When directory authorities reject a router descriptor due to
13845 keypinning, free the router descriptor rather than leaking the
13846 memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
13849 Changes in version 0.2.9.11 - 2017-06-08
13850 Tor 0.2.9.11 backports a fix for a bug that would allow an attacker to
13851 remotely crash a hidden service with an assertion failure. Anyone
13852 running a hidden service should upgrade to this version, or to some
13853 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
13854 are not affected by TROVE-2017-004.)
13856 Tor 0.2.9.11 also backports fixes for several key management bugs
13857 that sometimes made relays unreliable, as well as several other
13858 bugfixes described below.
13860 o Major bugfixes (hidden service, relay, security, backport
13861 from 0.3.1.3-alpha):
13862 - Fix a remotely triggerable assertion failure caused by receiving a
13863 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
13864 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
13867 o Major bugfixes (relay, link handshake, backport from 0.3.1.3-alpha):
13868 - When performing the v3 link handshake on a TLS connection, report
13869 that we have the x509 certificate that we actually used on that
13870 connection, even if we have changed certificates since that
13871 connection was first opened. Previously, we would claim to have
13872 used our most recent x509 link certificate, which would sometimes
13873 make the link handshake fail. Fixes one case of bug 22460; bugfix
13876 o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
13877 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
13878 December 2016 (of which ~126 were still functional) with a list of
13879 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
13880 2017. Resolves ticket 21564.
13882 o Minor features (future-proofing, backport from 0.3.0.7):
13883 - Tor no longer refuses to download microdescriptors or descriptors if
13884 they are listed as "published in the future". This change will
13885 eventually allow us to stop listing meaningful "published" dates
13886 in microdescriptor consensuses, and thereby allow us to reduce the
13887 resources required to download consensus diffs by over 50%.
13888 Implements part of ticket 21642; implements part of proposal 275.
13890 o Minor features (directory authorities, backport from 0.3.0.4-rc)
13891 - Directory authorities now reject relays running versions
13892 0.2.9.1-alpha through 0.2.9.4-alpha, because those relays
13893 suffer from bug 20499 and don't keep their consensus cache
13894 up-to-date. Resolves ticket 20509.
13896 o Minor features (geoip):
13897 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
13900 o Minor bugfixes (control port, backport from 0.3.0.6):
13901 - The GETINFO extra-info/digest/<digest> command was broken because
13902 of a wrong base16 decode return value check, introduced when
13903 refactoring that API. Fixes bug 22034; bugfix on 0.2.9.1-alpha.
13905 o Minor bugfixes (correctness, backport from 0.3.1.3-alpha):
13906 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
13907 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
13909 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.0.7):
13910 - The getpid() system call is now permitted under the Linux seccomp2
13911 sandbox, to avoid crashing with versions of OpenSSL (and other
13912 libraries) that attempt to learn the process's PID by using the
13913 syscall rather than the VDSO code. Fixes bug 21943; bugfix
13916 o Minor bugfixes (memory leak, directory authority, backport
13917 from 0.3.1.2-alpha):
13918 - When directory authorities reject a router descriptor due to
13919 keypinning, free the router descriptor rather than leaking the
13920 memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
13922 Changes in version 0.2.8.14 - 2017-06-08
13923 Tor 0.2.7.8 backports a fix for a bug that would allow an attacker to
13924 remotely crash a hidden service with an assertion failure. Anyone
13925 running a hidden service should upgrade to this version, or to some
13926 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
13927 are not affected by TROVE-2017-004.)
13929 o Major bugfixes (hidden service, relay, security):
13930 - Fix a remotely triggerable assertion failure caused by receiving a
13931 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
13932 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
13935 o Minor features (geoip):
13936 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
13939 o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
13940 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
13941 December 2016 (of which ~126 were still functional) with a list of
13942 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
13943 2017. Resolves ticket 21564.
13945 o Minor bugfixes (correctness):
13946 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
13947 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
13949 Changes in version 0.2.7.8 - 2017-06-08
13950 Tor 0.2.7.8 backports a fix for a bug that would allow an attacker to
13951 remotely crash a hidden service with an assertion failure. Anyone
13952 running a hidden service should upgrade to this version, or to some
13953 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
13954 are not affected by TROVE-2017-004.)
13956 o Major bugfixes (hidden service, relay, security):
13957 - Fix a remotely triggerable assertion failure caused by receiving a
13958 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
13959 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
13962 o Minor features (geoip):
13963 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
13966 o Minor bugfixes (correctness):
13967 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
13968 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
13971 Changes in version 0.2.6.12 - 2017-06-08
13972 Tor 0.2.6.12 backports a fix for a bug that would allow an attacker to
13973 remotely crash a hidden service with an assertion failure. Anyone
13974 running a hidden service should upgrade to this version, or to some
13975 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
13976 are not affected by TROVE-2017-004.)
13978 o Major bugfixes (hidden service, relay, security):
13979 - Fix a remotely triggerable assertion failure caused by receiving a
13980 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
13981 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
13984 o Minor features (geoip):
13985 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
13988 o Minor bugfixes (correctness):
13989 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
13990 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
13992 Changes in version 0.2.5.14 - 2017-06-08
13993 Tor 0.2.5.14 backports a fix for a bug that would allow an attacker to
13994 remotely crash a hidden service with an assertion failure. Anyone
13995 running a hidden service should upgrade to this version, or to some
13996 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
13997 are not affected by TROVE-2017-004.)
13999 o Major bugfixes (hidden service, relay, security):
14000 - Fix a remotely triggerable assertion failure caused by receiving a
14001 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
14002 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
14005 o Minor features (geoip):
14006 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
14009 o Minor bugfixes (correctness):
14010 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
14011 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
14013 Changes in version 0.2.4.29 - 2017-06-08
14014 Tor 0.2.4.29 backports a fix for a bug that would allow an attacker to
14015 remotely crash a hidden service with an assertion failure. Anyone
14016 running a hidden service should upgrade to this version, or to some
14017 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
14018 are not affected by TROVE-2017-004.)
14020 o Major bugfixes (hidden service, relay, security):
14021 - Fix a remotely triggerable assertion failure caused by receiving a
14022 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
14023 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
14026 o Minor features (geoip):
14027 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
14030 o Minor bugfixes (correctness):
14031 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
14032 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
14035 Changes in version 0.3.1.2-alpha - 2017-05-26
14036 Tor 0.3.1.2-alpha is the second release in the 0.3.1.x series. It
14037 fixes a few bugs found while testing 0.3.1.1-alpha, including a
14038 memory corruption bug that affected relay stability.
14040 o Major bugfixes (crash, relay):
14041 - Fix a memory-corruption bug in relays that set MyFamily.
14042 Previously, they would double-free MyFamily elements when making
14043 the next descriptor or when changing their configuration. Fixes
14044 bug 22368; bugfix on 0.3.1.1-alpha.
14046 o Minor bugfixes (logging):
14047 - Log a better message when a directory authority replies to an
14048 upload with an unexpected status code. Fixes bug 11121; bugfix
14051 o Minor bugfixes (memory leak, directory authority):
14052 - When directory authorities reject a router descriptor due to
14053 keypinning, free the router descriptor rather than leaking the
14054 memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
14057 Changes in version 0.3.1.1-alpha - 2017-05-22
14058 Tor 0.3.1.1-alpha is the first release in the 0.3.1.x series. It
14059 reduces the bandwidth usage for Tor's directory protocol, adds some
14060 basic padding to resist netflow-based traffic analysis and to serve as
14061 the basis of other padding in the future, and adds rust support to the
14064 It also contains numerous other small features and improvements to
14065 security, correctness, and performance.
14067 Below are the changes since 0.3.0.7.
14069 o Major features (directory protocol):
14070 - Tor relays and authorities can now serve clients an abbreviated
14071 version of the consensus document, containing only the changes
14072 since an older consensus document that the client holds. Clients
14073 now request these documents when available. When both client and
14074 server use this new protocol, they will use far less bandwidth (up
14075 to 94% less) to keep the client's consensus up-to-date. Implements
14076 proposal 140; closes ticket 13339. Based on work by Daniel Martí.
14077 - Tor can now compress directory traffic with lzma or with zstd
14078 compression algorithms, which can deliver better bandwidth
14079 performance. Because lzma is computationally expensive, it's only
14080 used for documents that can be compressed once and served many
14081 times. Support for these algorithms requires that tor is built
14082 with the libzstd and/or liblzma libraries available. Implements
14083 proposal 278; closes ticket 21662.
14084 - Relays now perform the more expensive compression operations, and
14085 consensus diff generation, in worker threads. This separation
14086 avoids delaying the main thread when a new consensus arrives.
14088 o Major features (experimental):
14089 - Tor can now build modules written in Rust. To turn this on, pass
14090 the "--enable-rust" flag to the configure script. It's not time to
14091 get excited yet: currently, there is no actual Rust functionality
14092 beyond some simple glue code, and a notice at startup to tell you
14093 that Rust is running. Still, we hope that programmers and
14094 packagers will try building Tor with Rust support, so that we can
14095 find issues and solve portability problems. Closes ticket 22106.
14097 o Major features (traffic analysis resistance):
14098 - Connections between clients and relays now send a padding cell in
14099 each direction every 1.5 to 9.5 seconds (tunable via consensus
14100 parameters). This padding will not resist specialized
14101 eavesdroppers, but it should be enough to make many ISPs' routine
14102 network flow logging less useful in traffic analysis against
14105 Padding is negotiated using Tor's link protocol, so both relays
14106 and clients must upgrade for this to take effect. Clients may
14107 still send padding despite the relay's version by setting
14108 ConnectionPadding 1 in torrc, and may disable padding by setting
14109 ConnectionPadding 0 in torrc. Padding may be minimized for mobile
14110 users with the torrc option ReducedConnectionPadding. Implements
14111 Proposal 251 and Section 2 of Proposal 254; closes ticket 16861.
14112 - Relays will publish 24 hour totals of padding and non-padding cell
14113 counts to their extra-info descriptors, unless PaddingStatistics 0
14114 is set in torrc. These 24 hour totals are also rounded to
14115 multiples of 10000.
14117 o Major bugfixes (connection usage):
14118 - We use NETINFO cells to try to determine if both relays involved
14119 in a connection will agree on the canonical status of that
14120 connection. We prefer the connections where this is the case for
14121 extend cells, and try to close connections where relays disagree
14122 on their canonical status early. Also, we now prefer the oldest
14123 valid connection for extend cells. These two changes should reduce
14124 the number of long-term connections that are kept open between
14125 relays. Fixes bug 17604; bugfix on 0.2.5.5-alpha.
14126 - Relays now log hourly statistics (look for
14127 "channel_check_for_duplicates" lines) on the total number of
14128 connections to other relays. If the number of connections per
14129 relay is unexpectedly large, this log message is at notice level.
14130 Otherwise it is at info.
14132 o Major bugfixes (entry guards):
14133 - Don't block bootstrapping when a primary bridge is offline and we
14134 can't get its descriptor. Fixes bug 22325; fixes one case of bug
14135 21969; bugfix on 0.3.0.3-alpha.
14137 o Major bugfixes (linux TPROXY support):
14138 - Fix a typo that had prevented TPROXY-based transparent proxying
14139 from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
14140 Patch from "d4fq0fQAgoJ".
14142 o Minor features (security, windows):
14143 - Enable a couple of pieces of Windows hardening: one
14144 (HeapEnableTerminationOnCorruption) that has been on-by-default
14145 since Windows 8, and unavailable before Windows 7; and one
14146 (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
14147 affect us, but shouldn't do any harm. Closes ticket 21953.
14149 o Minor features (config options):
14150 - Allow "%include" directives in torrc configuration files. These
14151 directives import the settings from other files, or from all the
14152 files in a directory. Closes ticket 1922. Code by Daniel Pinto.
14153 - Make SAVECONF return an error when overwriting a torrc that has
14154 includes. Using SAVECONF with the FORCE option will allow it to
14155 overwrite torrc even if includes are used. Related to ticket 1922.
14156 - Add "GETINFO config-can-saveconf" to tell controllers if SAVECONF
14157 will work without the FORCE option. Related to ticket 1922.
14159 o Minor features (controller):
14160 - Warn the first time that a controller requests data in the long-
14161 deprecated 'GETINFO network-status' format. Closes ticket 21703.
14163 o Minor features (defaults):
14164 - The default value for UseCreateFast is now 0: clients which
14165 haven't yet received a consensus document will now use a proper
14166 ntor handshake to talk to their directory servers whenever they
14167 can. Closes ticket 21407.
14168 - Onion key rotation and expiry intervals are now defined as a
14169 network consensus parameter, per proposal 274. The default
14170 lifetime of an onion key is increased from 7 to 28 days. Old onion
14171 keys will expire after 7 days by default. This change will make
14172 consensus diffs much smaller, and save significant bandwidth.
14173 Closes ticket 21641.
14175 o Minor features (fallback directory list):
14176 - Update the fallback directory mirror whitelist and blacklist based
14177 on operator emails. Closes task 21121.
14178 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
14179 December 2016 (of which ~126 were still functional) with a list of
14180 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
14181 2017. Resolves ticket 21564.
14183 o Minor features (hidden services, logging):
14184 - Log a message when a hidden service descriptor has fewer
14185 introduction points than specified in
14186 HiddenServiceNumIntroductionPoints. Closes tickets 21598.
14187 - Log a message when a hidden service reaches its introduction point
14188 circuit limit, and when that limit is reset. Follow up to ticket
14189 21594; closes ticket 21622.
14190 - Warn user if multiple entries in EntryNodes and at least one
14191 HiddenService are used together. Pinning EntryNodes along with a
14192 hidden service can be possibly harmful; for instance see ticket
14193 14917 or 21155. Closes ticket 21155.
14195 o Minor features (linux seccomp2 sandbox):
14196 - We now have a document storage backend compatible with the Linux
14197 seccomp2 sandbox. This backend is used for consensus documents and
14198 diffs between them; in the long term, we'd like to use it for
14199 unparseable directory material too. Closes ticket 21645
14200 - Increase the maximum allowed size passed to mprotect(PROT_WRITE)
14201 from 1MB to 16MB. This was necessary with the glibc allocator in
14202 order to allow worker threads to allocate more memory -- which in
14203 turn is necessary because of our new use of worker threads for
14204 compression. Closes ticket 22096.
14206 o Minor features (logging):
14207 - Log files are no longer created world-readable by default.
14208 (Previously, most distributors would store the logs in a non-
14209 world-readable location to prevent inappropriate access. This
14210 change is an extra precaution.) Closes ticket 21729; patch
14213 o Minor features (performance):
14214 - Our Keccak (SHA-3) implementation now accesses memory more
14215 efficiently, especially on little-endian systems. Closes
14217 - Add an O(1) implementation of channel_find_by_global_id(), to
14218 speed some controller functions.
14220 o Minor features (relay, configuration):
14221 - The MyFamily option may now be repeated as many times as desired,
14222 for relays that want to configure large families. Closes ticket
14223 4998; patch by Daniel Pinto.
14225 o Minor features (safety):
14226 - Add an explicit check to extrainfo_parse_entry_from_string() for
14227 NULL inputs. We don't believe this can actually happen, but it may
14228 help silence a warning from the Clang analyzer. Closes
14231 o Minor features (testing):
14232 - Add a "--disable-memory-sentinels" feature to help with fuzzing.
14233 When Tor is compiled with this option, we disable a number of
14234 redundant memory-safety failsafes that are intended to stop bugs
14235 from becoming security issues. This makes it easier to hunt for
14236 bugs that would be security issues without the failsafes turned
14237 on. Closes ticket 21439.
14238 - Add a general event-tracing instrumentation support to Tor. This
14239 subsystem will enable developers and researchers to add fine-
14240 grained instrumentation to their Tor instances, for use when
14241 examining Tor network performance issues. There are no trace
14242 events yet, and event-tracing is off by default unless enabled at
14243 compile time. Implements ticket 13802.
14244 - Improve our version parsing tests: add tests for typical version
14245 components, add tests for invalid versions, including numeric
14246 range and non-numeric prefixes. Unit tests 21278, 21450, and
14247 21507. Partially implements 21470.
14249 o Minor bugfixes (bandwidth accounting):
14250 - Roll over monthly accounting at the configured hour and minute,
14251 rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
14252 Found by Andrey Karpov with PVS-Studio.
14254 o Minor bugfixes (code correctness):
14255 - Accurately identify client connections by their lack of peer
14256 authentication. This means that we bail out earlier if asked to
14257 extend to a client. Follow-up to 21407. Fixes bug 21406; bugfix
14260 o Minor bugfixes (configuration):
14261 - Do not crash when starting with LearnCircuitBuildTimeout 0. Fixes
14262 bug 22252; bugfix on 0.2.9.3-alpha.
14264 o Minor bugfixes (connection lifespan):
14265 - Allow more control over how long TLS connections are kept open:
14266 unify CircuitIdleTimeout and PredictedPortsRelevanceTime into a
14267 single option called CircuitsAvailableTimeout. Also, allow the
14268 consensus to control the default values for both this preference
14269 and the lifespan of relay-to-relay connections. Fixes bug 17592;
14270 bugfix on 0.2.5.5-alpha.
14271 - Increase the initial circuit build timeout testing frequency, to
14272 help ensure that ReducedConnectionPadding clients finish learning
14273 a timeout before their orconn would expire. The initial testing
14274 rate was set back in the days of TAP and before the Tor Browser
14275 updater, when we had to be much more careful about new clients
14276 making lots of circuits. With this change, a circuit build timeout
14277 is learned in about 15-20 minutes, instead of 100-120 minutes.
14279 o Minor bugfixes (controller):
14280 - GETINFO onions/current and onions/detached no longer respond with
14281 551 on empty lists. Fixes bug 21329; bugfix on 0.2.7.1-alpha.
14282 - Trigger HS descriptor events on the control port when the client
14283 fails to pick a hidden service directory for a hidden service.
14284 This can happen if all the hidden service directories are in
14285 ExcludeNodes, or they have all been queried within the last 15
14286 minutes. Fixes bug 22042; bugfix on 0.2.5.2-alpha.
14288 o Minor bugfixes (directory authority):
14289 - When rejecting a router descriptor for running an obsolete version
14290 of Tor without ntor support, warn about the obsolete tor version,
14291 not the missing ntor key. Fixes bug 20270; bugfix on 0.2.9.3-alpha.
14292 - Prevent the shared randomness subsystem from asserting when
14293 initialized by a bridge authority with an incomplete configuration
14294 file. Fixes bug 21586; bugfix on 0.2.9.8.
14296 o Minor bugfixes (exit-side DNS):
14297 - Fix an untriggerable assertion that checked the output of a
14298 libevent DNS error, so that the assertion actually behaves as
14299 expected. Fixes bug 22244; bugfix on 0.2.0.20-rc. Found by Andrey
14300 Karpov using PVS-Studio.
14302 o Minor bugfixes (fallback directories):
14303 - Make the usage example in updateFallbackDirs.py actually work, and
14304 explain what it does. Fixes bug 22270; bugfix on 0.3.0.3-alpha.
14305 - Decrease the guard flag average required to be a fallback. This
14306 allows us to keep relays that have their guard flag removed when
14307 they restart. Fixes bug 20913; bugfix on 0.2.8.1-alpha.
14308 - Decrease the minimum number of fallbacks to 100. Fixes bug 20913;
14309 bugfix on 0.2.8.1-alpha.
14310 - Make sure fallback directory mirrors have the same address, port,
14311 and relay identity key for at least 30 days before they are
14312 selected. Fixes bug 20913; bugfix on 0.2.8.1-alpha.
14314 o Minor bugfixes (hidden services):
14315 - Stop printing a cryptic warning when a hidden service gets a
14316 request to connect to a virtual port that it hasn't configured.
14317 Fixes bug 16706; bugfix on 0.2.6.3-alpha.
14318 - Simplify hidden service descriptor creation by using an existing
14319 flag to check if an introduction point is established. Fixes bug
14320 21599; bugfix on 0.2.7.2-alpha.
14322 o Minor bugfixes (memory leak):
14323 - Fix a small memory leak at exit from the backtrace handler code.
14324 Fixes bug 21788; bugfix on 0.2.5.2-alpha. Patch from Daniel Pinto.
14326 o Minor bugfixes (protocol, logging):
14327 - Downgrade a log statement about unexpected relay cells from "bug"
14328 to "protocol warning", because there is at least one use case
14329 where it can be triggered by a buggy tor implementation. Fixes bug
14330 21293; bugfix on 0.1.1.14-alpha.
14332 o Minor bugfixes (testing):
14333 - Use unbuffered I/O for utility functions around the
14334 process_handle_t type. This fixes unit test failures reported on
14335 OpenBSD and FreeBSD. Fixes bug 21654; bugfix on 0.2.3.1-alpha.
14336 - Make display of captured unit test log messages consistent. Fixes
14337 bug 21510; bugfix on 0.2.9.3-alpha.
14338 - Make test-network.sh always call chutney's test-network.sh.
14339 Previously, this only worked on systems which had bash installed,
14340 due to some bash-specific code in the script. Fixes bug 19699;
14341 bugfix on 0.3.0.4-rc. Follow-up to ticket 21581.
14343 o Minor bugfixes (voting consistency):
14344 - Reject version numbers with non-numeric prefixes (such as +, -, or
14345 whitespace). Disallowing whitespace prevents differential version
14346 parsing between POSIX-based and Windows platforms. Fixes bug 21507
14347 and part of 21508; bugfix on 0.0.8pre1.
14349 o Minor bugfixes (windows, relay):
14350 - Resolve "Failure from drain_fd: No error" warnings on Windows
14351 relays. Fixes bug 21540; bugfix on 0.2.6.3-alpha.
14353 o Code simplification and refactoring:
14354 - Break up the 630-line function connection_dir_client_reached_eof()
14355 into a dozen smaller functions. This change should help
14356 maintainability and readability of the client directory code.
14357 - Isolate our use of the openssl headers so that they are only
14358 included from our crypto wrapper modules, and from tests that
14359 examine those modules' internals. Closes ticket 21841.
14360 - Simplify our API to launch directory requests, making it more
14361 extensible and less error-prone. Now it's easier to add extra
14362 headers to directory requests. Closes ticket 21646.
14363 - Our base64 decoding functions no longer overestimate the output
14364 space that they need when parsing unpadded inputs. Closes
14366 - Remove unused "ROUTER_ADDED_NOTIFY_GENERATOR" internal value.
14367 Resolves ticket 22213.
14368 - The logic that directory caches use to spool request to clients,
14369 serving them one part at a time so as not to allocate too much
14370 memory, has been refactored for consistency. Previously there was
14371 a separate spooling implementation per type of spoolable data. Now
14372 there is one common spooling implementation, with extensible data
14373 types. Closes ticket 21651.
14374 - Tor's compression module now supports multiple backends. Part of
14375 the implementation for proposal 278; closes ticket 21663.
14378 - Clarify the behavior of the KeepAliveIsolateSOCKSAuth sub-option.
14379 Closes ticket 21873.
14380 - Correct documentation about the default DataDirectory value.
14381 Closes ticket 21151.
14382 - Document the default behavior of NumEntryGuards and
14383 NumDirectoryGuards correctly. Fixes bug 21715; bugfix
14385 - Document key=value pluggable transport arguments for Bridge lines
14386 in torrc. Fixes bug 20341; bugfix on 0.2.5.1-alpha.
14387 - Note that bandwidth-limiting options don't affect TCP headers or
14388 DNS. Closes ticket 17170.
14390 o Removed features (configuration options, all in ticket 22060):
14391 - These configuration options are now marked Obsolete, and no longer
14392 have any effect: AllowInvalidNodes, AllowSingleHopCircuits,
14393 AllowSingleHopExits, ExcludeSingleHopRelays, FastFirstHopPK,
14394 TLSECGroup, WarnUnsafeSocks. They were first marked as deprecated
14395 in 0.2.9.2-alpha and have now been removed. The previous default
14396 behavior is now always chosen; the previous (less secure) non-
14397 default behavior is now unavailable.
14398 - CloseHSClientCircuitsImmediatelyOnTimeout and
14399 CloseHSServiceRendCircuitsImmediatelyOnTimeout were deprecated in
14400 0.2.9.2-alpha and now have been removed. HS circuits never close
14401 on circuit build timeout; they have a longer timeout period.
14402 - {Control,DNS,Dir,Socks,Trans,NATD,OR}ListenAddress were deprecated
14403 in 0.2.9.2-alpha and now have been removed. Use the ORPort option
14404 (and others) to configure listen-only and advertise-only addresses.
14406 o Removed features (tools):
14407 - We've removed the tor-checkkey tool from src/tools. Long ago, we
14408 used it to help people detect RSA keys that were generated by
14409 versions of Debian affected by CVE-2008-0166. But those keys have
14410 been out of circulation for ages, and this tool is no longer
14411 required. Closes ticket 21842.
14414 Changes in version 0.3.0.7 - 2017-05-15
14415 Tor 0.3.0.7 fixes a medium-severity security bug in earlier versions
14416 of Tor 0.3.0.x, where an attacker could cause a Tor relay process
14417 to exit. Relays running earlier versions of Tor 0.3.0.x should upgrade;
14418 clients are not affected.
14420 o Major bugfixes (hidden service directory, security):
14421 - Fix an assertion failure in the hidden service directory code, which
14422 could be used by an attacker to remotely cause a Tor relay process to
14423 exit. Relays running earlier versions of Tor 0.3.0.x should upgrade.
14424 should upgrade. This security issue is tracked as TROVE-2017-002.
14425 Fixes bug 22246; bugfix on 0.3.0.1-alpha.
14428 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
14431 o Minor features (future-proofing):
14432 - Tor no longer refuses to download microdescriptors or descriptors
14433 if they are listed as "published in the future". This change will
14434 eventually allow us to stop listing meaningful "published" dates
14435 in microdescriptor consensuses, and thereby allow us to reduce the
14436 resources required to download consensus diffs by over 50%.
14437 Implements part of ticket 21642; implements part of proposal 275.
14439 o Minor bugfixes (Linux seccomp2 sandbox):
14440 - The getpid() system call is now permitted under the Linux seccomp2
14441 sandbox, to avoid crashing with versions of OpenSSL (and other
14442 libraries) that attempt to learn the process's PID by using the
14443 syscall rather than the VDSO code. Fixes bug 21943; bugfix
14447 Changes in version 0.3.0.6 - 2017-04-26
14448 Tor 0.3.0.6 is the first stable release of the Tor 0.3.0 series.
14450 With the 0.3.0 series, clients and relays now use Ed25519 keys to
14451 authenticate their link connections to relays, rather than the old
14452 RSA1024 keys that they used before. (Circuit crypto has been
14453 Curve25519-authenticated since 0.2.4.8-alpha.) We have also replaced
14454 the guard selection and replacement algorithm to behave more robustly
14455 in the presence of unreliable networks, and to resist guard-
14458 This series also includes numerous other small features and bugfixes,
14459 along with more groundwork for the upcoming hidden-services revamp.
14461 Per our stable release policy, we plan to support the Tor 0.3.0
14462 release series for at least the next nine months, or for three months
14463 after the first stable release of the 0.3.1 series: whichever is
14464 longer. If you need a release with long-term support, we recommend
14465 that you stay with the 0.2.9 series.
14467 Below are the changes since 0.3.0.5-rc. For a list of all changes
14468 since 0.2.9, see the ReleaseNotes file.
14470 o Minor features (geoip):
14471 - Update geoip and geoip6 to the April 4 2017 Maxmind GeoLite2
14474 o Minor bugfixes (control port):
14475 - The GETINFO extra-info/digest/<digest> command was broken because
14476 of a wrong base16 decode return value check, introduced when
14477 refactoring that API. Fixes bug 22034; bugfix on 0.2.9.1-alpha.
14479 o Minor bugfixes (crash prevention):
14480 - Fix a (currently untriggerable, but potentially dangerous) crash
14481 bug when base32-encoding inputs whose sizes are not a multiple of
14482 5. Fixes bug 21894; bugfix on 0.2.9.1-alpha.
14485 Changes in version 0.3.0.5-rc - 2017-04-05
14486 Tor 0.3.0.5-rc fixes a few remaining bugs, large and small, in the
14487 0.3.0 release series.
14489 This is the second release candidate in the Tor 0.3.0 series, and has
14490 much fewer changes than the first. If we find no new bugs or
14491 regressions here, the first stable 0.3.0 release will be nearly
14494 o Major bugfixes (crash, directory connections):
14495 - Fix a rare crash when sending a begin cell on a circuit whose
14496 linked directory connection had already been closed. Fixes bug
14497 21576; bugfix on 0.2.9.3-alpha. Reported by Alec Muffett.
14499 o Major bugfixes (guard selection):
14500 - Fix a guard selection bug where Tor would refuse to bootstrap in
14501 some cases if the user swapped a bridge for another bridge in
14502 their configuration file. Fixes bug 21771; bugfix on 0.3.0.1-alpha.
14503 Reported by "torvlnt33r".
14505 o Minor features (geoip):
14506 - Update geoip and geoip6 to the March 7 2017 Maxmind GeoLite2
14509 o Minor bugfix (compilation):
14510 - Fix a warning when compiling hs_service.c. Previously, it had no
14511 exported symbols when compiled for libor.a, resulting in a
14512 compilation warning from clang. Fixes bug 21825; bugfix
14515 o Minor bugfixes (hidden services):
14516 - Make hidden services check for failed intro point connections,
14517 even when they have exceeded their intro point creation limit.
14518 Fixes bug 21596; bugfix on 0.2.7.2-alpha. Reported by Alec Muffett.
14519 - Make hidden services with 8 to 10 introduction points check for
14520 failed circuits immediately after startup. Previously, they would
14521 wait for 5 minutes before performing their first checks. Fixes bug
14522 21594; bugfix on 0.2.3.9-alpha. Reported by Alec Muffett.
14524 o Minor bugfixes (memory leaks):
14525 - Fix a memory leak when using GETCONF on a port option. Fixes bug
14526 21682; bugfix on 0.3.0.3-alpha.
14528 o Minor bugfixes (relay):
14529 - Avoid a double-marked-circuit warning that could happen when we
14530 receive DESTROY cells under heavy load. Fixes bug 20059; bugfix
14533 o Minor bugfixes (tests):
14534 - Run the entry_guard_parse_from_state_full() test with the time set
14535 to a specific date. (The guard state that this test was parsing
14536 contained guards that had expired since the test was first
14537 written.) Fixes bug 21799; bugfix on 0.3.0.1-alpha.
14540 - Update the description of the directory server options in the
14541 manual page, to clarify that a relay no longer needs to set
14542 DirPort in order to be a directory cache. Closes ticket 21720.
14546 Changes in version 0.2.8.13 - 2017-03-03
14547 Tor 0.2.8.13 backports a security fix from later Tor
14548 releases. Anybody running Tor 0.2.8.12 or earlier should upgrade to this
14549 this release, if for some reason they cannot upgrade to a later
14550 release series, and if they build Tor with the --enable-expensive-hardening
14553 Note that support for Tor 0.2.8.x is ending next year: we will not issue
14554 any fixes for the Tor 0.2.8.x series after 1 Jan 2018. If you need
14555 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
14557 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
14558 - Fix an integer underflow bug when comparing malformed Tor
14559 versions. This bug could crash Tor when built with
14560 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
14561 0.2.9.8, which were built with -ftrapv by default. In other cases
14562 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
14563 on 0.0.8pre1. Found by OSS-Fuzz.
14565 o Minor features (geoip):
14566 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
14570 Changes in version 0.2.7.7 - 2017-03-03
14571 Tor 0.2.7.7 backports a number of security fixes from later Tor
14572 releases. Anybody running Tor 0.2.7.6 or earlier should upgrade to
14573 this release, if for some reason they cannot upgrade to a later
14576 Note that support for Tor 0.2.7.x is ending this year: we will not issue
14577 any fixes for the Tor 0.2.7.x series after 1 August 2017. If you need
14578 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
14580 o Directory authority changes (backport from 0.2.8.5-rc):
14581 - Urras is no longer a directory authority. Closes ticket 19271.
14583 o Directory authority changes (backport from 0.2.9.2-alpha):
14584 - The "Tonga" bridge authority has been retired; the new bridge
14585 authority is "Bifroest". Closes tickets 19728 and 19690.
14587 o Directory authority key updates (backport from 0.2.8.1-alpha):
14588 - Update the V3 identity key for the dannenberg directory authority:
14589 it was changed on 18 November 2015. Closes task 17906. Patch
14592 o Major bugfixes (parsing, security, backport from 0.2.9.8):
14593 - Fix a bug in parsing that could cause clients to read a single
14594 byte past the end of an allocated region. This bug could be used
14595 to cause hardened clients (built with --enable-expensive-hardening)
14596 to crash if they tried to visit a hostile hidden service. Non-
14597 hardened clients are only affected depending on the details of
14598 their platform's memory allocator. Fixes bug 21018; bugfix on
14599 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
14600 2016-12-002 and as CVE-2016-1254.
14602 o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
14603 - Stop a crash that could occur when a client running with DNSPort
14604 received a query with multiple address types, and the first
14605 address type was not supported. Found and fixed by Scott Dial.
14606 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
14607 - Prevent a class of security bugs caused by treating the contents
14608 of a buffer chunk as if they were a NUL-terminated string. At
14609 least one such bug seems to be present in all currently used
14610 versions of Tor, and would allow an attacker to remotely crash
14611 most Tor instances, especially those compiled with extra compiler
14612 hardening. With this defense in place, such bugs can't crash Tor,
14613 though we should still fix them as they occur. Closes ticket
14614 20384 (TROVE-2016-10-001).
14616 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
14617 - Avoid a difficult-to-trigger heap corruption attack when extending
14618 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
14619 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
14620 Reported by Guido Vranken.
14622 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
14623 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
14624 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
14626 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
14627 - If OpenSSL fails to generate an RSA key, do not retain a dangling
14628 pointer to the previous (uninitialized) key value. The impact here
14629 should be limited to a difficult-to-trigger crash, if OpenSSL is
14630 running an engine that makes key generation failures possible, or
14631 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
14632 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
14635 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
14636 - Fix an integer underflow bug when comparing malformed Tor
14637 versions. This bug could crash Tor when built with
14638 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
14639 0.2.9.8, which were built with -ftrapv by default. In other cases
14640 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
14641 on 0.0.8pre1. Found by OSS-Fuzz.
14643 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
14644 - Make memwipe() do nothing when passed a NULL pointer or buffer of
14645 zero size. Check size argument to memwipe() for underflow. Fixes
14646 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
14649 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
14650 - Make Tor survive errors involving connections without a
14651 corresponding event object. Previously we'd fail with an
14652 assertion; now we produce a log message. Related to bug 16248.
14654 o Minor features (geoip):
14655 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
14659 Changes in version 0.2.6.11 - 2017-03-03
14660 Tor 0.2.6.11 backports a number of security fixes from later Tor
14661 releases. Anybody running Tor 0.2.6.10 or earlier should upgrade to
14662 this release, if for some reason they cannot upgrade to a later
14665 Note that support for Tor 0.2.6.x is ending this year: we will not issue
14666 any fixes for the Tor 0.2.6.x series after 1 August 2017. If you need
14667 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
14669 o Directory authority changes (backport from 0.2.8.5-rc):
14670 - Urras is no longer a directory authority. Closes ticket 19271.
14672 o Directory authority changes (backport from 0.2.9.2-alpha):
14673 - The "Tonga" bridge authority has been retired; the new bridge
14674 authority is "Bifroest". Closes tickets 19728 and 19690.
14676 o Directory authority key updates (backport from 0.2.8.1-alpha):
14677 - Update the V3 identity key for the dannenberg directory authority:
14678 it was changed on 18 November 2015. Closes task 17906. Patch
14681 o Major features (security fixes, backport from 0.2.9.4-alpha):
14682 - Prevent a class of security bugs caused by treating the contents
14683 of a buffer chunk as if they were a NUL-terminated string. At
14684 least one such bug seems to be present in all currently used
14685 versions of Tor, and would allow an attacker to remotely crash
14686 most Tor instances, especially those compiled with extra compiler
14687 hardening. With this defense in place, such bugs can't crash Tor,
14688 though we should still fix them as they occur. Closes ticket
14689 20384 (TROVE-2016-10-001).
14691 o Major bugfixes (parsing, security, backport from 0.2.9.8):
14692 - Fix a bug in parsing that could cause clients to read a single
14693 byte past the end of an allocated region. This bug could be used
14694 to cause hardened clients (built with --enable-expensive-hardening)
14695 to crash if they tried to visit a hostile hidden service. Non-
14696 hardened clients are only affected depending on the details of
14697 their platform's memory allocator. Fixes bug 21018; bugfix on
14698 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
14699 2016-12-002 and as CVE-2016-1254.
14701 o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
14702 - Stop a crash that could occur when a client running with DNSPort
14703 received a query with multiple address types, and the first
14704 address type was not supported. Found and fixed by Scott Dial.
14705 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
14707 o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
14708 - Fix an error that could cause us to read 4 bytes before the
14709 beginning of an openssl string. This bug could be used to cause
14710 Tor to crash on systems with unusual malloc implementations, or
14711 systems with unusual hardening installed. Fixes bug 17404; bugfix
14714 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
14715 - Avoid a difficult-to-trigger heap corruption attack when extending
14716 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
14717 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
14718 Reported by Guido Vranken.
14720 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
14721 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
14722 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
14724 o Major bugfixes (guard selection, backport from 0.2.7.6):
14725 - Actually look at the Guard flag when selecting a new directory
14726 guard. When we implemented the directory guard design, we
14727 accidentally started treating all relays as if they have the Guard
14728 flag during guard selection, leading to weaker anonymity and worse
14729 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
14732 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
14733 - If OpenSSL fails to generate an RSA key, do not retain a dangling
14734 pointer to the previous (uninitialized) key value. The impact here
14735 should be limited to a difficult-to-trigger crash, if OpenSSL is
14736 running an engine that makes key generation failures possible, or
14737 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
14738 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
14741 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
14742 - Fix an integer underflow bug when comparing malformed Tor
14743 versions. This bug could crash Tor when built with
14744 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
14745 0.2.9.8, which were built with -ftrapv by default. In other cases
14746 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
14747 on 0.0.8pre1. Found by OSS-Fuzz.
14749 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
14750 - Make memwipe() do nothing when passed a NULL pointer or buffer of
14751 zero size. Check size argument to memwipe() for underflow. Fixes
14752 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
14755 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
14756 - Make Tor survive errors involving connections without a
14757 corresponding event object. Previously we'd fail with an
14758 assertion; now we produce a log message. Related to bug 16248.
14760 o Minor features (geoip):
14761 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
14764 o Minor bugfixes (compilation, backport from 0.2.7.6):
14765 - Fix a compilation warning with Clang 3.6: Do not check the
14766 presence of an address which can never be NULL. Fixes bug 17781.
14769 Changes in version 0.2.5.13 - 2017-03-03
14770 Tor 0.2.5.13 backports a number of security fixes from later Tor
14771 releases. Anybody running Tor 0.2.5.13 or earlier should upgrade to
14772 this release, if for some reason they cannot upgrade to a later
14775 Note that support for Tor 0.2.5.x is ending next year: we will not issue
14776 any fixes for the Tor 0.2.5.x series after 1 May 2018. If you need
14777 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
14779 o Directory authority changes (backport from 0.2.8.5-rc):
14780 - Urras is no longer a directory authority. Closes ticket 19271.
14782 o Directory authority changes (backport from 0.2.9.2-alpha):
14783 - The "Tonga" bridge authority has been retired; the new bridge
14784 authority is "Bifroest". Closes tickets 19728 and 19690.
14786 o Directory authority key updates (backport from 0.2.8.1-alpha):
14787 - Update the V3 identity key for the dannenberg directory authority:
14788 it was changed on 18 November 2015. Closes task 17906. Patch
14791 o Major features (security fixes, backport from 0.2.9.4-alpha):
14792 - Prevent a class of security bugs caused by treating the contents
14793 of a buffer chunk as if they were a NUL-terminated string. At
14794 least one such bug seems to be present in all currently used
14795 versions of Tor, and would allow an attacker to remotely crash
14796 most Tor instances, especially those compiled with extra compiler
14797 hardening. With this defense in place, such bugs can't crash Tor,
14798 though we should still fix them as they occur. Closes ticket
14799 20384 (TROVE-2016-10-001).
14801 o Major bugfixes (parsing, security, backport from 0.2.9.8):
14802 - Fix a bug in parsing that could cause clients to read a single
14803 byte past the end of an allocated region. This bug could be used
14804 to cause hardened clients (built with --enable-expensive-hardening)
14805 to crash if they tried to visit a hostile hidden service. Non-
14806 hardened clients are only affected depending on the details of
14807 their platform's memory allocator. Fixes bug 21018; bugfix on
14808 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
14809 2016-12-002 and as CVE-2016-1254.
14811 o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
14812 - Stop a crash that could occur when a client running with DNSPort
14813 received a query with multiple address types, and the first
14814 address type was not supported. Found and fixed by Scott Dial.
14815 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
14817 o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
14818 - Fix an error that could cause us to read 4 bytes before the
14819 beginning of an openssl string. This bug could be used to cause
14820 Tor to crash on systems with unusual malloc implementations, or
14821 systems with unusual hardening installed. Fixes bug 17404; bugfix
14824 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
14825 - Avoid a difficult-to-trigger heap corruption attack when extending
14826 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
14827 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
14828 Reported by Guido Vranken.
14830 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
14831 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
14832 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
14834 o Major bugfixes (guard selection, backport from 0.2.7.6):
14835 - Actually look at the Guard flag when selecting a new directory
14836 guard. When we implemented the directory guard design, we
14837 accidentally started treating all relays as if they have the Guard
14838 flag during guard selection, leading to weaker anonymity and worse
14839 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
14842 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
14843 - If OpenSSL fails to generate an RSA key, do not retain a dangling
14844 pointer to the previous (uninitialized) key value. The impact here
14845 should be limited to a difficult-to-trigger crash, if OpenSSL is
14846 running an engine that makes key generation failures possible, or
14847 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
14848 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
14851 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
14852 - Fix an integer underflow bug when comparing malformed Tor
14853 versions. This bug could crash Tor when built with
14854 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
14855 0.2.9.8, which were built with -ftrapv by default. In other cases
14856 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
14857 on 0.0.8pre1. Found by OSS-Fuzz.
14859 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
14860 - Make memwipe() do nothing when passed a NULL pointer or buffer of
14861 zero size. Check size argument to memwipe() for underflow. Fixes
14862 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
14865 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
14866 - Make Tor survive errors involving connections without a
14867 corresponding event object. Previously we'd fail with an
14868 assertion; now we produce a log message. Related to bug 16248.
14870 o Minor features (geoip):
14871 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
14874 o Minor bugfixes (compilation, backport from 0.2.7.6):
14875 - Fix a compilation warning with Clang 3.6: Do not check the
14876 presence of an address which can never be NULL. Fixes bug 17781.
14878 o Minor bugfixes (crypto error-handling, backport from 0.2.7.2-alpha):
14879 - Check for failures from crypto_early_init, and refuse to continue.
14880 A previous typo meant that we could keep going with an
14881 uninitialized crypto library, and would have OpenSSL initialize
14882 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
14883 when implementing ticket 4900. Patch by "teor".
14885 o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
14886 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
14887 a client authorized hidden service. Fixes bug 15823; bugfix
14891 Changes in version 0.2.4.28 - 2017-03-03
14892 Tor 0.2.4.28 backports a number of security fixes from later Tor
14893 releases. Anybody running Tor 0.2.4.27 or earlier should upgrade to
14894 this release, if for some reason they cannot upgrade to a later
14897 Note that support for Tor 0.2.4.x is ending soon: we will not issue
14898 any fixes for the Tor 0.2.4.x series after 1 August 2017. If you need
14899 a Tor release series with long-term support, we recommend Tor 0.2.9.x.
14901 o Directory authority changes (backport from 0.2.8.5-rc):
14902 - Urras is no longer a directory authority. Closes ticket 19271.
14904 o Directory authority changes (backport from 0.2.9.2-alpha):
14905 - The "Tonga" bridge authority has been retired; the new bridge
14906 authority is "Bifroest". Closes tickets 19728 and 19690.
14908 o Directory authority key updates (backport from 0.2.8.1-alpha):
14909 - Update the V3 identity key for the dannenberg directory authority:
14910 it was changed on 18 November 2015. Closes task 17906. Patch
14913 o Major features (security fixes, backport from 0.2.9.4-alpha):
14914 - Prevent a class of security bugs caused by treating the contents
14915 of a buffer chunk as if they were a NUL-terminated string. At
14916 least one such bug seems to be present in all currently used
14917 versions of Tor, and would allow an attacker to remotely crash
14918 most Tor instances, especially those compiled with extra compiler
14919 hardening. With this defense in place, such bugs can't crash Tor,
14920 though we should still fix them as they occur. Closes ticket
14921 20384 (TROVE-2016-10-001).
14923 o Major bugfixes (parsing, security, backport from 0.2.9.8):
14924 - Fix a bug in parsing that could cause clients to read a single
14925 byte past the end of an allocated region. This bug could be used
14926 to cause hardened clients (built with --enable-expensive-hardening)
14927 to crash if they tried to visit a hostile hidden service. Non-
14928 hardened clients are only affected depending on the details of
14929 their platform's memory allocator. Fixes bug 21018; bugfix on
14930 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
14931 2016-12-002 and as CVE-2016-1254.
14933 o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
14934 - Fix an error that could cause us to read 4 bytes before the
14935 beginning of an openssl string. This bug could be used to cause
14936 Tor to crash on systems with unusual malloc implementations, or
14937 systems with unusual hardening installed. Fixes bug 17404; bugfix
14940 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
14941 - Avoid a difficult-to-trigger heap corruption attack when extending
14942 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
14943 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
14944 Reported by Guido Vranken.
14946 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
14947 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
14948 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
14950 o Major bugfixes (guard selection, backport from 0.2.7.6):
14951 - Actually look at the Guard flag when selecting a new directory
14952 guard. When we implemented the directory guard design, we
14953 accidentally started treating all relays as if they have the Guard
14954 flag during guard selection, leading to weaker anonymity and worse
14955 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
14958 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
14959 - If OpenSSL fails to generate an RSA key, do not retain a dangling
14960 pointer to the previous (uninitialized) key value. The impact here
14961 should be limited to a difficult-to-trigger crash, if OpenSSL is
14962 running an engine that makes key generation failures possible, or
14963 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
14964 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
14967 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
14968 - Fix an integer underflow bug when comparing malformed Tor
14969 versions. This bug could crash Tor when built with
14970 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
14971 0.2.9.8, which were built with -ftrapv by default. In other cases
14972 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
14973 on 0.0.8pre1. Found by OSS-Fuzz.
14975 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
14976 - Make memwipe() do nothing when passed a NULL pointer or buffer of
14977 zero size. Check size argument to memwipe() for underflow. Fixes
14978 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
14981 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
14982 - Make Tor survive errors involving connections without a
14983 corresponding event object. Previously we'd fail with an
14984 assertion; now we produce a log message. Related to bug 16248.
14986 o Minor features (DoS-resistance, backport from 0.2.7.1-alpha):
14987 - Make it harder for attackers to overload hidden services with
14988 introductions, by blocking multiple introduction requests on the
14989 same circuit. Resolves ticket 15515.
14991 o Minor features (geoip):
14992 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
14995 o Minor bugfixes (compilation, backport from 0.2.7.6):
14996 - Fix a compilation warning with Clang 3.6: Do not check the
14997 presence of an address which can never be NULL. Fixes bug 17781.
14999 o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
15000 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
15001 a client authorized hidden service. Fixes bug 15823; bugfix
15005 Changes in version 0.3.0.4-rc - 2017-03-01
15006 Tor 0.3.0.4-rc fixes some remaining bugs, large and small, in the
15007 0.3.0 release series, and introduces a few reliability features to
15008 keep them from coming back.
15010 This is the first release candidate in the Tor 0.3.0 series. If we
15011 find no new bugs or regressions here, the first stable 0.3.0 release
15012 will be nearly identical to it.
15014 o Major bugfixes (bridges):
15015 - When the same bridge is configured multiple times with the same
15016 identity, but at different address:port combinations, treat those
15017 bridge instances as separate guards. This fix restores the ability
15018 of clients to configure the same bridge with multiple pluggable
15019 transports. Fixes bug 21027; bugfix on 0.3.0.1-alpha.
15021 o Major bugfixes (hidden service directory v3):
15022 - Stop crashing on a failed v3 hidden service descriptor lookup
15023 failure. Fixes bug 21471; bugfixes on 0.3.0.1-alpha.
15025 o Major bugfixes (parsing):
15026 - When parsing a malformed content-length field from an HTTP
15027 message, do not read off the end of the buffer. This bug was a
15028 potential remote denial-of-service attack against Tor clients and
15029 relays. A workaround was released in October 2016, to prevent this
15030 bug from crashing Tor. This is a fix for the underlying issue,
15031 which should no longer matter (if you applied the earlier patch).
15032 Fixes bug 20894; bugfix on 0.2.0.16-alpha. Bug found by fuzzing
15033 using AFL (http://lcamtuf.coredump.cx/afl/).
15034 - Fix an integer underflow bug when comparing malformed Tor
15035 versions. This bug could crash Tor when built with
15036 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
15037 0.2.9.8, which were built with -ftrapv by default. In other cases
15038 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
15039 on 0.0.8pre1. Found by OSS-Fuzz.
15041 o Minor feature (protocol versioning):
15042 - Add new protocol version for proposal 224. HSIntro now advertises
15043 version "3-4" and HSDir version "1-2". Fixes ticket 20656.
15045 o Minor features (directory authorities):
15046 - Directory authorities now reject descriptors that claim to be
15047 malformed versions of Tor. Helps prevent exploitation of
15049 - Reject version numbers with components that exceed INT32_MAX.
15050 Otherwise 32-bit and 64-bit platforms would behave inconsistently.
15051 Fixes bug 21450; bugfix on 0.0.8pre1.
15052 - Directory authorities now reject relays running versions
15053 0.2.9.1-alpha through 0.2.9.4-alpha, because those relays
15054 suffer from bug 20499 and don't keep their consensus cache
15055 up-to-date. Resolves ticket 20509.
15057 o Minor features (geoip):
15058 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
15061 o Minor features (reliability, crash):
15062 - Try better to detect problems in buffers where they might grow (or
15063 think they have grown) over 2 GB in size. Diagnostic for
15066 o Minor features (testing):
15067 - During 'make test-network-all', if tor logs any warnings, ask
15068 chutney to output them. Requires a recent version of chutney with
15069 the 21572 patch. Implements 21570.
15071 o Minor bugfixes (certificate expiration time):
15072 - Avoid using link certificates that don't become valid till some
15073 time in the future. Fixes bug 21420; bugfix on 0.2.4.11-alpha
15075 o Minor bugfixes (code correctness):
15076 - Repair a couple of (unreachable or harmless) cases of the risky
15077 comparison-by-subtraction pattern that caused bug 21278.
15078 - Remove a redundant check for the UseEntryGuards option from the
15079 options_transition_affects_guards() function. Fixes bug 21492;
15080 bugfix on 0.3.0.1-alpha.
15082 o Minor bugfixes (directory mirrors):
15083 - Allow relays to use directory mirrors without a DirPort: these
15084 relays need to be contacted over their ORPorts using a begindir
15085 connection. Fixes one case of bug 20711; bugfix on 0.2.8.2-alpha.
15086 - Clarify the message logged when a remote relay is unexpectedly
15087 missing an ORPort or DirPort: users were confusing this with a
15088 local port. Fixes another case of bug 20711; bugfix
15091 o Minor bugfixes (guards):
15092 - Don't warn about a missing guard state on timeout-measurement
15093 circuits: they aren't supposed to be using guards. Fixes an
15094 instance of bug 21007; bugfix on 0.3.0.1-alpha.
15095 - Silence a BUG() warning when attempting to use a guard whose
15096 descriptor we don't know, and make this scenario less likely to
15097 happen. Fixes bug 21415; bugfix on 0.3.0.1-alpha.
15099 o Minor bugfixes (hidden service):
15100 - Pass correct buffer length when encoding legacy ESTABLISH_INTRO
15101 cells. Previously, we were using sizeof() on a pointer, instead of
15102 the real destination buffer. Fortunately, that value was only used
15103 to double-check that there was enough room--which was already
15104 enforced elsewhere. Fixes bug 21553; bugfix on 0.3.0.1-alpha.
15106 o Minor bugfixes (testing):
15107 - Fix Raspbian build issues related to missing socket errno in
15108 test_util.c. Fixes bug 21116; bugfix on 0.2.8.2. Patch
15110 - Rename "make fuzz" to "make test-fuzz-corpora", since it doesn't
15111 actually fuzz anything. Fixes bug 21447; bugfix on 0.3.0.3-alpha.
15112 - Use bash in src/test/test-network.sh. This ensures we reliably
15113 call chutney's newer tools/test-network.sh when available. Fixes
15114 bug 21562; bugfix on 0.2.9.1-alpha.
15117 - Small fixes to the fuzzing documentation. Closes ticket 21472.
15120 Changes in version 0.2.9.10 - 2017-03-01
15121 Tor 0.2.9.10 backports a security fix from later Tor release. It also
15122 includes fixes for some major issues affecting directory authorities,
15123 LibreSSL compatibility, and IPv6 correctness.
15125 The Tor 0.2.9.x release series is now marked as a long-term-support
15126 series. We intend to backport security fixes to 0.2.9.x until at
15127 least January of 2020.
15129 o Major bugfixes (directory authority, 0.3.0.3-alpha):
15130 - During voting, when marking a relay as a probable sybil, do not
15131 clear its BadExit flag: sybils can still be bad in other ways
15132 too. (We still clear the other flags.) Fixes bug 21108; bugfix
15135 o Major bugfixes (IPv6 Exits, backport from 0.3.0.3-alpha):
15136 - Stop rejecting all IPv6 traffic on Exits whose exit policy rejects
15137 any IPv6 addresses. Instead, only reject a port over IPv6 if the
15138 exit policy rejects that port on more than an IPv6 /16 of
15139 addresses. This bug was made worse by 17027 in 0.2.8.1-alpha,
15140 which rejected a relay's own IPv6 address by default. Fixes bug
15141 21357; bugfix on commit 004f3f4e53 in 0.2.4.7-alpha.
15143 o Major bugfixes (parsing, also in 0.3.0.4-rc):
15144 - Fix an integer underflow bug when comparing malformed Tor
15145 versions. This bug could crash Tor when built with
15146 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
15147 0.2.9.8, which were built with -ftrapv by default. In other cases
15148 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
15149 on 0.0.8pre1. Found by OSS-Fuzz.
15151 o Minor features (directory authorities, also in 0.3.0.4-rc):
15152 - Directory authorities now reject descriptors that claim to be
15153 malformed versions of Tor. Helps prevent exploitation of
15155 - Reject version numbers with components that exceed INT32_MAX.
15156 Otherwise 32-bit and 64-bit platforms would behave inconsistently.
15157 Fixes bug 21450; bugfix on 0.0.8pre1.
15159 o Minor features (geoip):
15160 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
15163 o Minor features (portability, compilation, backport from 0.3.0.3-alpha):
15164 - Autoconf now checks to determine if OpenSSL structures are opaque,
15165 instead of explicitly checking for OpenSSL version numbers. Part
15167 - Support building with recent LibreSSL code that uses opaque
15168 structures. Closes ticket 21359.
15170 o Minor bugfixes (code correctness, also in 0.3.0.4-rc):
15171 - Repair a couple of (unreachable or harmless) cases of the risky
15172 comparison-by-subtraction pattern that caused bug 21278.
15174 o Minor bugfixes (tor-resolve, backport from 0.3.0.3-alpha):
15175 - The tor-resolve command line tool now rejects hostnames over 255
15176 characters in length. Previously, it would silently truncate them,
15177 which could lead to bugs. Fixes bug 21280; bugfix on 0.0.9pre5.
15178 Patch by "junglefowl".
15181 Changes in version 0.3.0.3-alpha - 2017-02-03
15182 Tor 0.3.0.3-alpha fixes a few significant bugs introduced over the
15183 0.3.0.x development series, including some that could cause
15184 authorities to behave badly. There is also a fix for a longstanding
15185 bug that could prevent IPv6 exits from working. Tor 0.3.0.3-alpha also
15186 includes some smaller features and bugfixes.
15188 The Tor 0.3.0.x release series is now in patch-freeze: no additional
15189 features will be considered for inclusion in 0.3.0.x. We suspect that
15190 some bugs will probably remain, however, and we encourage people to
15193 o Major bugfixes (directory authority):
15194 - During voting, when marking a relay as a probable sybil, do not
15195 clear its BadExit flag: sybils can still be bad in other ways
15196 too. (We still clear the other flags.) Fixes bug 21108; bugfix
15198 - When deciding whether we have just found a router to be reachable,
15199 do not penalize it for not having performed an Ed25519 link
15200 handshake if it does not claim to support an Ed25519 handshake.
15201 Previously, we would treat such relays as non-running. Fixes bug
15202 21107; bugfix on 0.3.0.1-alpha.
15204 o Major bugfixes (entry guards):
15205 - Stop trying to build circuits through entry guards for which we
15206 have no descriptor. Also, stop crashing in the case that we *do*
15207 accidentally try to build a circuit in such a state. Fixes bug
15208 21242; bugfix on 0.3.0.1-alpha.
15210 o Major bugfixes (IPv6 Exits):
15211 - Stop rejecting all IPv6 traffic on Exits whose exit policy rejects
15212 any IPv6 addresses. Instead, only reject a port over IPv6 if the
15213 exit policy rejects that port on more than an IPv6 /16 of
15214 addresses. This bug was made worse by 17027 in 0.2.8.1-alpha,
15215 which rejected a relay's own IPv6 address by default. Fixes bug
15216 21357; bugfix on commit 004f3f4e53 in 0.2.4.7-alpha.
15218 o Minor feature (client):
15219 - Enable IPv6 traffic on the SocksPort by default. To disable this,
15220 a user will have to specify "NoIPv6Traffic". Closes ticket 21269.
15222 o Minor feature (fallback scripts):
15223 - Add a check_existing mode to updateFallbackDirs.py, which checks
15224 if fallbacks in the hard-coded list are working. Closes ticket
15225 20174. Patch by haxxpop.
15227 o Minor features (ciphersuite selection):
15228 - Clients now advertise a list of ciphersuites closer to the ones
15229 preferred by Firefox. Closes part of ticket 15426.
15230 - Allow relays to accept a wider range of ciphersuites, including
15231 chacha20-poly1305 and AES-CCM. Closes the other part of 15426.
15233 o Minor features (controller, configuration):
15234 - Each of the *Port options, such as SocksPort, ORPort, ControlPort,
15235 and so on, now comes with a __*Port variant that will not be saved
15236 to the torrc file by the controller's SAVECONF command. This
15237 change allows TorBrowser to set up a single-use domain socket for
15238 each time it launches Tor. Closes ticket 20956.
15239 - The GETCONF command can now query options that may only be
15240 meaningful in context-sensitive lists. This allows the controller
15241 to query the mixed SocksPort/__SocksPort style options introduced
15242 in feature 20956. Implements ticket 21300.
15244 o Minor features (portability, compilation):
15245 - Autoconf now checks to determine if OpenSSL structures are opaque,
15246 instead of explicitly checking for OpenSSL version numbers. Part
15248 - Support building with recent LibreSSL code that uses opaque
15249 structures. Closes ticket 21359.
15251 o Minor features (relay):
15252 - We now allow separation of exit and relay traffic to different
15253 source IP addresses, using the OutboundBindAddressExit and
15254 OutboundBindAddressOR options respectively. Closes ticket 17975.
15255 Written by Michael Sonntag.
15257 o Minor bugfix (logging):
15258 - Don't recommend the use of Tor2web in non-anonymous mode.
15259 Recommending Tor2web is a bad idea because the client loses all
15260 anonymity. Tor2web should only be used in specific cases by users
15261 who *know* and understand the issues. Fixes bug 21294; bugfix
15264 o Minor bugfixes (client):
15265 - Always recover from failures in extend_info_from_node(), in an
15266 attempt to prevent any recurrence of bug 21242. Fixes bug 21372;
15267 bugfix on 0.2.3.1-alpha.
15269 o Minor bugfixes (client, entry guards):
15270 - Fix a bug warning (with backtrace) when we fail a channel that
15271 circuits to fallback directories on it. Fixes bug 21128; bugfix
15273 - Fix a spurious bug warning (with backtrace) when removing an
15274 expired entry guard. Fixes bug 21129; bugfix on 0.3.0.1-alpha.
15275 - Fix a bug of the new guard algorithm where tor could stall for up
15276 to 10 minutes before retrying a guard after a long period of no
15277 network. Fixes bug 21052; bugfix on 0.3.0.1-alpha.
15278 - Do not try to build circuits until we have descriptors for our
15279 primary entry guards. Related to fix for bug 21242.
15281 o Minor bugfixes (configure, autoconf):
15282 - Rename the configure option --enable-expensive-hardening to
15283 --enable-fragile-hardening. Expensive hardening makes the tor
15284 daemon abort when some kinds of issues are detected. Thus, it
15285 makes tor more at risk of remote crashes but safer against RCE or
15286 heartbleed bug category. We now try to explain this issue in a
15287 message from the configure script. Fixes bug 21290; bugfix
15290 o Minor bugfixes (controller):
15291 - Restore the (deprecated) DROPGUARDS controller command. Fixes bug
15292 20824; bugfix on 0.3.0.1-alpha.
15294 o Minor bugfixes (hidden service):
15295 - Clean up the code for expiring intro points with no associated
15296 circuits. It was causing, rarely, a service with some expiring
15297 introduction points to not open enough additional introduction
15298 points. Fixes part of bug 21302; bugfix on 0.2.7.2-alpha.
15299 - Stop setting the torrc option HiddenServiceStatistics to "0" just
15300 because we're not a bridge or relay. Instead, we preserve whatever
15301 value the user set (or didn't set). Fixes bug 21150; bugfix
15303 - Resolve two possible underflows which could lead to creating and
15304 closing a lot of introduction point circuits in a non-stop loop.
15305 Fixes bug 21302; bugfix on 0.2.7.2-alpha.
15307 o Minor bugfixes (portability):
15308 - Use "OpenBSD" compiler macro instead of "OPENBSD" or "__OpenBSD__".
15309 It is supported by OpenBSD itself, and also by most OpenBSD
15310 variants (such as Bitrig). Fixes bug 20980; bugfix
15312 - When mapping a file of length greater than SIZE_MAX, do not
15313 silently truncate its contents. This issue could occur on 32 bit
15314 systems with large file support and files which are larger than 4
15315 GB. Fixes bug 21134; bugfix on 0.3.0.1-alpha.
15317 o Minor bugfixes (tor-resolve):
15318 - The tor-resolve command line tool now rejects hostnames over 255
15319 characters in length. Previously, it would silently truncate them,
15320 which could lead to bugs. Fixes bug 21280; bugfix on 0.0.9pre5.
15321 Patch by "junglefowl".
15323 o Minor bugfixes (Windows services):
15324 - Be sure to initialize the monotonic time subsystem before using
15325 it, even when running as an NT service. Fixes bug 21356; bugfix
15329 Changes in version 0.3.0.2-alpha - 2017-01-23
15330 Tor 0.3.0.2-alpha fixes a denial-of-service bug where an attacker could
15331 cause relays and clients to crash, even if they were not built with
15332 the --enable-expensive-hardening option. This bug affects all 0.2.9.x
15333 versions, and also affects 0.3.0.1-alpha: all relays running an affected
15334 version should upgrade.
15336 Tor 0.3.0.2-alpha also improves how exit relays and clients handle DNS
15337 time-to-live values, makes directory authorities enforce the 1-to-1
15338 mapping of relay RSA identity keys to ED25519 identity keys, fixes a
15339 client-side onion service reachability bug, does better at selecting
15340 the set of fallback directories, and more.
15342 o Major bugfixes (security, also in 0.2.9.9):
15343 - Downgrade the "-ftrapv" option from "always on" to "only on when
15344 --enable-expensive-hardening is provided." This hardening option, like
15345 others, can turn survivable bugs into crashes--and having it on by
15346 default made a (relatively harmless) integer overflow bug into a
15347 denial-of-service bug. Fixes bug 21278 (TROVE-2017-001); bugfix on
15350 o Major features (security):
15351 - Change the algorithm used to decide DNS TTLs on client and server
15352 side, to better resist DNS-based correlation attacks like the
15353 DefecTor attack of Greschbach, Pulls, Roberts, Winter, and
15354 Feamster. Now relays only return one of two possible DNS TTL
15355 values, and clients are willing to believe DNS TTL values up to 3
15356 hours long. Closes ticket 19769.
15358 o Major features (directory authority, security):
15359 - The default for AuthDirPinKeys is now 1: directory authorities
15360 will reject relays where the RSA identity key matches a previously
15361 seen value, but the Ed25519 key has changed. Closes ticket 18319.
15363 o Major bugfixes (client, guard, crash):
15364 - In circuit_get_global_origin_list(), return the actual list of
15365 origin circuits. The previous version of this code returned the
15366 list of all the circuits, and could have caused strange bugs,
15367 including possible crashes. Fixes bug 21118; bugfix
15370 o Major bugfixes (client, onion service, also in 0.2.9.9):
15371 - Fix a client-side onion service reachability bug, where multiple
15372 socks requests to an onion service (or a single slow request)
15373 could cause us to mistakenly mark some of the service's
15374 introduction points as failed, and we cache that failure so
15375 eventually we run out and can't reach the service. Also resolves a
15376 mysterious "Remote server sent bogus reason code 65021" log
15377 warning. The bug was introduced in ticket 17218, where we tried to
15378 remember the circuit end reason as a uint16_t, which mangled
15379 negative values. Partially fixes bug 21056 and fixes bug 20307;
15380 bugfix on 0.2.8.1-alpha.
15382 o Major bugfixes (DNS):
15383 - Fix a bug that prevented exit nodes from caching DNS records for
15384 more than 60 seconds. Fixes bug 19025; bugfix on 0.2.4.7-alpha.
15386 o Minor features (controller):
15387 - Add "GETINFO sr/current" and "GETINFO sr/previous" keys, to expose
15388 shared-random values to the controller. Closes ticket 19925.
15390 o Minor features (entry guards):
15391 - Add UseEntryGuards to TEST_OPTIONS_DEFAULT_VALUES in order to not
15392 break regression tests.
15393 - Require UseEntryGuards when UseBridges is set, in order to make
15394 sure bridges aren't bypassed. Resolves ticket 20502.
15396 o Minor features (fallback directories):
15397 - Select 200 fallback directories for each release. Closes
15399 - Allow 3 fallback relays per operator, which is safe now that we
15400 are choosing 200 fallback relays. Closes ticket 20912.
15401 - Exclude relays affected by bug 20499 from the fallback list.
15402 Exclude relays from the fallback list if they are running versions
15403 known to be affected by bug 20499, or if in our tests they deliver
15404 a stale consensus (i.e. one that expired more than 24 hours ago).
15405 Closes ticket 20539.
15406 - Reduce the minimum fallback bandwidth to 1 MByte/s. Part of
15408 - Require fallback directories to have the same address and port for
15409 7 days (now that we have enough relays with this stability).
15410 Relays whose OnionOO stability timer is reset on restart by bug
15411 18050 should upgrade to Tor 0.2.8.7 or later, which has a fix for
15412 this issue. Closes ticket 20880; maintains short-term fix
15414 - Require fallbacks to have flags for 90% of the time (weighted
15415 decaying average), rather than 95%. This allows at least 73% of
15416 clients to bootstrap in the first 5 seconds without contacting an
15417 authority. Part of ticket 18828.
15418 - Annotate updateFallbackDirs.py with the bandwidth and consensus
15419 weight for each candidate fallback. Closes ticket 20878.
15420 - Make it easier to change the output sort order of fallbacks.
15421 Closes ticket 20822.
15422 - Display the relay fingerprint when downloading consensuses from
15423 fallbacks. Closes ticket 20908.
15425 o Minor features (geoip, also in 0.2.9.9):
15426 - Update geoip and geoip6 to the January 4 2017 Maxmind GeoLite2
15429 o Minor features (next-gen onion service directories):
15430 - Remove the "EnableOnionServicesV3" consensus parameter that we
15431 introduced in 0.3.0.1-alpha: relays are now always willing to act
15432 as v3 onion service directories. Resolves ticket 19899.
15434 o Minor features (linting):
15435 - Enhance the changes file linter to warn on Tor versions that are
15436 prefixed with "tor-". Closes ticket 21096.
15438 o Minor features (logging):
15439 - In several places, describe unset ed25519 keys as "<unset>",
15440 rather than the scary "AAAAAAAA...AAA". Closes ticket 21037.
15442 o Minor bugfix (control protocol):
15443 - The reply to a "GETINFO config/names" request via the control
15444 protocol now spells the type "Dependent" correctly. This is a
15445 breaking change in the control protocol. (The field seems to be
15446 ignored by the most common known controllers.) Fixes bug 18146;
15447 bugfix on 0.1.1.4-alpha.
15449 o Minor bugfixes (bug resilience):
15450 - Fix an unreachable size_t overflow in base64_decode(). Fixes bug
15451 19222; bugfix on 0.2.0.9-alpha. Found by Guido Vranken; fixed by
15452 Hans Jerry Illikainen.
15454 o Minor bugfixes (build):
15455 - Replace obsolete Autoconf macros with their modern equivalent and
15456 prevent similar issues in the future. Fixes bug 20990; bugfix
15459 o Minor bugfixes (client, guards):
15460 - Fix bug where Tor would think that there are circuits waiting for
15461 better guards even though those circuits have been freed. Fixes
15462 bug 21142; bugfix on 0.3.0.1-alpha.
15464 o Minor bugfixes (config):
15465 - Don't assert on startup when trying to get the options list and
15466 LearnCircuitBuildTimeout is set to 0: we are currently parsing the
15467 options so of course they aren't ready yet. Fixes bug 21062;
15468 bugfix on 0.2.9.3-alpha.
15470 o Minor bugfixes (controller):
15471 - Make the GETINFO interface for inquiring about entry guards
15472 support the new guards backend. Fixes bug 20823; bugfix
15475 o Minor bugfixes (dead code):
15476 - Remove a redundant check for PidFile changes at runtime in
15477 options_transition_allowed(): this check is already performed
15478 regardless of whether the sandbox is active. Fixes bug 21123;
15479 bugfix on 0.2.5.4-alpha.
15481 o Minor bugfixes (documentation):
15482 - Update the tor manual page to document every option that can not
15483 be changed while tor is running. Fixes bug 21122.
15485 o Minor bugfixes (fallback directories):
15486 - Stop failing when a relay has no uptime data in
15487 updateFallbackDirs.py. Fixes bug 20945; bugfix on 0.2.8.1-alpha.
15488 - Avoid checking fallback candidates' DirPorts if they are down in
15489 OnionOO. When a relay operator has multiple relays, this
15490 prioritizes relays that are up over relays that are down. Fixes
15491 bug 20926; bugfix on 0.2.8.3-alpha.
15492 - Stop failing when OUTPUT_COMMENTS is True in updateFallbackDirs.py.
15493 Fixes bug 20877; bugfix on 0.2.8.3-alpha.
15495 o Minor bugfixes (guards, bootstrapping):
15496 - When connecting to a directory guard during bootstrap, do not mark
15497 the guard as successful until we receive a good-looking directory
15498 response from it. Fixes bug 20974; bugfix on 0.3.0.1-alpha.
15500 o Minor bugfixes (onion services):
15501 - Fix the config reload pruning of old vs new services so it
15502 actually works when both ephemeral and non-ephemeral services are
15503 configured. Fixes bug 21054; bugfix on 0.3.0.1-alpha.
15504 - Allow the number of introduction points to be as low as 0, rather
15505 than as low as 3. Fixes bug 21033; bugfix on 0.2.7.2-alpha.
15507 o Minor bugfixes (IPv6):
15508 - Make IPv6-using clients try harder to find an IPv6 directory
15509 server. Fixes bug 20999; bugfix on 0.2.8.2-alpha.
15510 - When IPv6 addresses have not been downloaded yet (microdesc
15511 consensus documents don't list relay IPv6 addresses), use hard-
15512 coded addresses for authorities, fallbacks, and configured
15513 bridges. Now IPv6-only clients can use microdescriptors. Fixes bug
15514 20996; bugfix on b167e82 from 19608 in 0.2.8.5-alpha.
15516 o Minor bugfixes (memory leaks):
15517 - Fix a memory leak when configuring hidden services. Fixes bug
15518 20987; bugfix on 0.3.0.1-alpha.
15520 o Minor bugfixes (portability, also in 0.2.9.9):
15521 - Avoid crashing when Tor is built using headers that contain
15522 CLOCK_MONOTONIC_COARSE, but then tries to run on an older kernel
15523 without CLOCK_MONOTONIC_COARSE. Fixes bug 21035; bugfix
15525 - Fix Libevent detection on platforms without Libevent 1 headers
15526 installed. Fixes bug 21051; bugfix on 0.2.9.1-alpha.
15528 o Minor bugfixes (relay):
15529 - Honor DataDirectoryGroupReadable when tor is a relay. Previously,
15530 initializing the keys would reset the DataDirectory to 0700
15531 instead of 0750 even if DataDirectoryGroupReadable was set to 1.
15532 Fixes bug 19953; bugfix on 0.0.2pre16. Patch by "redfish".
15534 o Minor bugfixes (testing):
15535 - Remove undefined behavior from the backtrace generator by removing
15536 its signal handler. Fixes bug 21026; bugfix on 0.2.5.2-alpha.
15538 o Minor bugfixes (unit tests):
15539 - Allow the unit tests to pass even when DNS lookups of bogus
15540 addresses do not fail as expected. Fixes bug 20862 and 20863;
15541 bugfix on unit tests introduced in 0.2.8.1-alpha
15542 through 0.2.9.4-alpha.
15544 o Code simplification and refactoring:
15545 - Refactor code to manipulate global_origin_circuit_list into
15546 separate functions. Closes ticket 20921.
15548 o Documentation (formatting):
15549 - Clean up formatting of tor.1 man page and HTML doc, where <pre>
15550 blocks were incorrectly appearing. Closes ticket 20885.
15552 o Documentation (man page):
15553 - Clarify many options in tor.1 and add some min/max values for
15554 HiddenService options. Closes ticket 21058.
15557 Changes in version 0.2.9.9 - 2017-01-23
15558 Tor 0.2.9.9 fixes a denial-of-service bug where an attacker could
15559 cause relays and clients to crash, even if they were not built with
15560 the --enable-expensive-hardening option. This bug affects all 0.2.9.x
15561 versions, and also affects 0.3.0.1-alpha: all relays running an affected
15562 version should upgrade.
15564 This release also resolves a client-side onion service reachability
15565 bug, and resolves a pair of small portability issues.
15567 o Major bugfixes (security):
15568 - Downgrade the "-ftrapv" option from "always on" to "only on when
15569 --enable-expensive-hardening is provided." This hardening option,
15570 like others, can turn survivable bugs into crashes -- and having
15571 it on by default made a (relatively harmless) integer overflow bug
15572 into a denial-of-service bug. Fixes bug 21278 (TROVE-2017-001);
15573 bugfix on 0.2.9.1-alpha.
15575 o Major bugfixes (client, onion service):
15576 - Fix a client-side onion service reachability bug, where multiple
15577 socks requests to an onion service (or a single slow request)
15578 could cause us to mistakenly mark some of the service's
15579 introduction points as failed, and we cache that failure so
15580 eventually we run out and can't reach the service. Also resolves a
15581 mysterious "Remote server sent bogus reason code 65021" log
15582 warning. The bug was introduced in ticket 17218, where we tried to
15583 remember the circuit end reason as a uint16_t, which mangled
15584 negative values. Partially fixes bug 21056 and fixes bug 20307;
15585 bugfix on 0.2.8.1-alpha.
15587 o Minor features (geoip):
15588 - Update geoip and geoip6 to the January 4 2017 Maxmind GeoLite2
15591 o Minor bugfixes (portability):
15592 - Avoid crashing when Tor is built using headers that contain
15593 CLOCK_MONOTONIC_COARSE, but then tries to run on an older kernel
15594 without CLOCK_MONOTONIC_COARSE. Fixes bug 21035; bugfix
15596 - Fix Libevent detection on platforms without Libevent 1 headers
15597 installed. Fixes bug 21051; bugfix on 0.2.9.1-alpha.
15600 Changes in version 0.3.0.1-alpha - 2016-12-19
15601 Tor 0.3.0.1-alpha is the first alpha release in the 0.3.0 development
15602 series. It strengthens Tor's link and circuit handshakes by
15603 identifying relays by their Ed25519 keys, improves the algorithm that
15604 clients use to choose and maintain their list of guards, and includes
15605 additional backend support for the next-generation hidden service
15606 design. It also contains numerous other small features and
15607 improvements to security, correctness, and performance.
15609 Below are the changes since 0.2.9.8.
15611 o Major features (guard selection algorithm):
15612 - Tor's guard selection algorithm has been redesigned from the
15613 ground up, to better support unreliable networks and restrictive
15614 sets of entry nodes, and to better resist guard-capture attacks by
15615 hostile local networks. Implements proposal 271; closes
15618 o Major features (next-generation hidden services):
15619 - Relays can now handle v3 ESTABLISH_INTRO cells as specified by
15620 prop224 aka "Next Generation Hidden Services". Service and clients
15621 don't use this functionality yet. Closes ticket 19043. Based on
15622 initial code by Alec Heifetz.
15623 - Relays now support the HSDir version 3 protocol, so that they can
15624 can store and serve v3 descriptors. This is part of the next-
15625 generation onion service work detailed in proposal 224. Closes
15628 o Major features (protocol, ed25519 identity keys):
15629 - Relays now use Ed25519 to prove their Ed25519 identities and to
15630 one another, and to clients. This algorithm is faster and more
15631 secure than the RSA-based handshake we've been doing until now.
15632 Implements the second big part of proposal 220; Closes
15634 - Clients now support including Ed25519 identity keys in the EXTEND2
15635 cells they generate. By default, this is controlled by a consensus
15636 parameter, currently disabled. You can turn this feature on for
15637 testing by setting ExtendByEd25519ID in your configuration. This
15638 might make your traffic appear different than the traffic
15639 generated by other users, however. Implements part of ticket
15640 15056; part of proposal 220.
15641 - Relays now understand requests to extend to other relays by their
15642 Ed25519 identity keys. When an Ed25519 identity key is included in
15643 an EXTEND2 cell, the relay will only extend the circuit if the
15644 other relay can prove ownership of that identity. Implements part
15645 of ticket 15056; part of proposal 220.
15647 o Major bugfixes (scheduler):
15648 - Actually compare circuit policies in ewma_cmp_cmux(). This bug
15649 caused the channel scheduler to behave more or less randomly,
15650 rather than preferring channels with higher-priority circuits.
15651 Fixes bug 20459; bugfix on 0.2.6.2-alpha.
15653 o Minor features (controller):
15654 - When HSFETCH arguments cannot be parsed, say "Invalid argument"
15655 rather than "unrecognized." Closes ticket 20389; patch from
15658 o Minor features (diagnostic, directory client):
15659 - Warn when we find an unexpected inconsistency in directory
15660 download status objects. Prevents some negative consequences of
15663 o Minor features (directory authority):
15664 - Add a new authority-only AuthDirTestEd25519LinkKeys option (on by
15665 default) to control whether authorities should try to probe relays
15666 by their Ed25519 link keys. This option will go away in a few
15667 releases--unless we encounter major trouble in our ed25519 link
15668 protocol rollout, in which case it will serve as a safety option.
15670 o Minor features (directory cache):
15671 - Relays and bridges will now refuse to serve the consensus they
15672 have if they know it is too old for a client to use. Closes
15675 o Minor features (ed25519 link handshake):
15676 - Advertise support for the ed25519 link handshake using the
15677 subprotocol-versions mechanism, so that clients can tell which
15678 relays can identity themselves by Ed25519 ID. Closes ticket 20552.
15680 o Minor features (fingerprinting resistance, authentication):
15681 - Extend the length of RSA keys used for TLS link authentication to
15682 2048 bits. (These weren't used for forward secrecy; for forward
15683 secrecy, we used P256.) Closes ticket 13752.
15685 o Minor features (infrastructure):
15686 - Implement smartlist_add_strdup() function. Replaces the use of
15687 smartlist_add(sl, tor_strdup(str)). Closes ticket 20048.
15689 o Minor bugfixes (client):
15690 - When clients that use bridges start up with a cached consensus on
15691 disk, they were ignoring it and downloading a new one. Now they
15692 use the cached one. Fixes bug 20269; bugfix on 0.2.3.12-alpha.
15694 o Minor bugfixes (configuration):
15695 - Accept non-space whitespace characters after the severity level in
15696 the `Log` option. Fixes bug 19965; bugfix on 0.2.1.1-alpha.
15697 - Support "TByte" and "TBytes" units in options given in bytes.
15698 "TB", "terabyte(s)", "TBit(s)" and "terabit(s)" were already
15699 supported. Fixes bug 20622; bugfix on 0.2.0.14-alpha.
15701 o Minor bugfixes (consensus weight):
15702 - Add new consensus method that initializes bw weights to 1 instead
15703 of 0. This prevents a zero weight from making it all the way to
15704 the end (happens in small testing networks) and causing an error.
15705 Fixes bug 14881; bugfix on 0.2.2.17-alpha.
15707 o Minor bugfixes (descriptors):
15708 - Correctly recognise downloaded full descriptors as valid, even
15709 when using microdescriptors as circuits. This affects clients with
15710 FetchUselessDescriptors set, and may affect directory authorities.
15711 Fixes bug 20839; bugfix on 0.2.3.2-alpha.
15713 o Minor bugfixes (directory system):
15714 - Download all consensus flavors, descriptors, and authority
15715 certificates when FetchUselessDescriptors is set, regardless of
15716 whether tor is a directory cache or not. Fixes bug 20667; bugfix
15717 on all recent tor versions.
15718 - Bridges and relays now use microdescriptors (like clients do)
15719 rather than old-style router descriptors. Now bridges will blend
15720 in with clients in terms of the circuits they build. Fixes bug
15721 6769; bugfix on 0.2.3.2-alpha.
15723 o Minor bugfixes (ed25519 certificates):
15724 - Correctly interpret ed25519 certificates that would expire some
15725 time after 19 Jan 2038. Fixes bug 20027; bugfix on 0.2.7.2-alpha.
15727 o Minor bugfixes (hidden services):
15728 - Stop ignoring misconfigured hidden services. Instead, refuse to
15729 start tor until the misconfigurations have been corrected. Fixes
15730 bug 20559; bugfix on multiple commits in 0.2.7.1-alpha
15733 o Minor bugfixes (memory leak at exit):
15734 - Fix a small harmless memory leak at exit of the previously unused
15735 RSA->Ed identity cross-certificate. Fixes bug 17779; bugfix
15738 o Minor bugfixes (util):
15739 - When finishing writing a file to disk, if we were about to replace
15740 the file with the temporary file created before and we fail to
15741 replace it, remove the temporary file so it doesn't stay on disk.
15742 Fixes bug 20646; bugfix on 0.2.0.7-alpha. Patch by fk.
15744 o Minor bugfixes (Windows):
15745 - Check for getpagesize before using it to mmap files. This fixes
15746 compilation in some MinGW environments. Fixes bug 20530; bugfix on
15747 0.1.2.1-alpha. Reported by "ice".
15749 o Code simplification and refactoring:
15750 - Abolish all global guard context in entrynodes.c; replace with new
15751 guard_selection_t structure as preparation for proposal 271.
15752 Closes ticket 19858.
15753 - Introduce rend_service_is_ephemeral() that tells if given onion
15754 service is ephemeral. Replace unclear NULL-checkings for service
15755 directory with this function. Closes ticket 20526.
15756 - Extract magic numbers in circuituse.c into defined variables.
15757 - Refactor circuit_is_available_for_use to remove unnecessary check.
15758 - Refactor circuit_predict_and_launch_new for readability and
15759 testability. Closes ticket 18873.
15760 - Refactor large if statement in purpose_needs_anonymity to use
15761 switch statement instead. Closes part of ticket 20077.
15762 - Refactor the hashing API to return negative values for errors, as
15763 is done as throughout the codebase. Closes ticket 20717.
15764 - Remove data structures that were used to index or_connection
15765 objects by their RSA identity digests. These structures are fully
15766 redundant with the similar structures used in the
15767 channel abstraction.
15768 - Remove duplicate code in the channel_write_*cell() functions.
15769 Closes ticket 13827; patch from Pingl.
15770 - Remove redundant behavior of is_sensitive_dir_purpose, refactor to
15771 use only purpose_needs_anonymity. Closes part of ticket 20077.
15772 - The code to generate and parse EXTEND and EXTEND2 cells has been
15773 replaced with code automatically generated by the
15777 - Include the "TBits" unit in Tor's man page. Fixes part of bug
15778 20622; bugfix on 0.2.5.1-alpha.
15779 - Change '1' to 'weight_scale' in consensus bw weights calculation
15780 comments, as that is reality. Closes ticket 20273. Patch
15782 - Correct the value for AuthDirGuardBWGuarantee in the manpage, from
15783 250 KBytes to 2 MBytes. Fixes bug 20435; bugfix
15785 - Stop the man page from incorrectly stating that HiddenServiceDir
15786 must already exist. Fixes 20486.
15787 - Clarify that when ClientRejectInternalAddresses is enabled (which
15788 is the default), multicast DNS hostnames for machines on the local
15789 network (of the form *.local) are also rejected. Closes
15792 o Removed features:
15793 - The AuthDirMaxServersPerAuthAddr option no longer exists: The same
15794 limit for relays running on a single IP applies to authority IP
15795 addresses as well as to non-authority IP addresses. Closes
15797 - The UseDirectoryGuards torrc option no longer exists: all users
15798 that use entry guards will also use directory guards. Related to
15799 proposal 271; implements part of ticket 20831.
15802 - New unit tests for tor_htonll(). Closes ticket 19563. Patch
15803 from "overcaffeinated".
15804 - Perform the coding style checks when running the tests and fail
15805 when coding style violations are found. Closes ticket 5500.
15806 - Add tests for networkstatus_compute_bw_weights_v10.
15807 - Add unit tests circuit_predict_and_launch_new.
15808 - Extract dummy_origin_circuit_new so it can be used by other
15812 Changes in version 0.2.8.12 - 2016-12-19
15813 Tor 0.2.8.12 backports a fix for a medium-severity issue (bug 21018
15814 below) where Tor clients could crash when attempting to visit a
15815 hostile hidden service. Clients are recommended to upgrade as packages
15816 become available for their systems.
15818 It also includes an updated list of fallback directories, backported
15821 Now that the Tor 0.2.9 series is stable, only major bugfixes will be
15822 backported to 0.2.8 in the future.
15824 o Major bugfixes (parsing, security, backported from 0.2.9.8):
15825 - Fix a bug in parsing that could cause clients to read a single
15826 byte past the end of an allocated region. This bug could be used
15827 to cause hardened clients (built with --enable-expensive-hardening)
15828 to crash if they tried to visit a hostile hidden service. Non-
15829 hardened clients are only affected depending on the details of
15830 their platform's memory allocator. Fixes bug 21018; bugfix on
15831 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
15832 2016-12-002 and as CVE-2016-1254.
15834 o Minor features (fallback directory list, backported from 0.2.9.8):
15835 - Replace the 81 remaining fallbacks of the 100 originally
15836 introduced in Tor 0.2.8.3-alpha in March 2016, with a list of 177
15837 fallbacks (123 new, 54 existing, 27 removed) generated in December
15838 2016. Resolves ticket 20170.
15840 o Minor features (geoip, backported from 0.2.9.7-rc):
15841 - Update geoip and geoip6 to the December 7 2016 Maxmind GeoLite2
15845 Changes in version 0.2.9.8 - 2016-12-19
15846 Tor 0.2.9.8 is the first stable release of the Tor 0.2.9 series.
15848 The Tor 0.2.9 series makes mandatory a number of security features
15849 that were formerly optional. It includes support for a new shared-
15850 randomness protocol that will form the basis for next generation
15851 hidden services, includes a single-hop hidden service mode for
15852 optimizing .onion services that don't actually want to be hidden,
15853 tries harder not to overload the directory authorities with excessive
15854 downloads, and supports a better protocol versioning scheme for
15855 improved compatibility with other implementations of the Tor protocol.
15857 And of course, there are numerous other bugfixes and improvements.
15859 This release also includes a fix for a medium-severity issue (bug
15860 21018 below) where Tor clients could crash when attempting to visit a
15861 hostile hidden service. Clients are recommended to upgrade as packages
15862 become available for their systems.
15864 Below are the changes since 0.2.9.7-rc. For a list of all changes
15865 since 0.2.8, see the ReleaseNotes file.
15867 o Major bugfixes (parsing, security):
15868 - Fix a bug in parsing that could cause clients to read a single
15869 byte past the end of an allocated region. This bug could be used
15870 to cause hardened clients (built with --enable-expensive-hardening)
15871 to crash if they tried to visit a hostile hidden service. Non-
15872 hardened clients are only affected depending on the details of
15873 their platform's memory allocator. Fixes bug 21018; bugfix on
15874 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
15875 2016-12-002 and as CVE-2016-1254.
15877 o Minor features (fallback directory list):
15878 - Replace the 81 remaining fallbacks of the 100 originally
15879 introduced in Tor 0.2.8.3-alpha in March 2016, with a list of 177
15880 fallbacks (123 new, 54 existing, 27 removed) generated in December
15881 2016. Resolves ticket 20170.
15884 Changes in version 0.2.9.7-rc - 2016-12-12
15885 Tor 0.2.9.7-rc fixes a few small bugs remaining in Tor 0.2.9.6-rc,
15886 including a few that had prevented tests from passing on
15889 o Minor features (geoip):
15890 - Update geoip and geoip6 to the December 7 2016 Maxmind GeoLite2
15893 o Minor bugfix (build):
15894 - The current Git revision when building from a local repository is
15895 now detected correctly when using git worktrees. Fixes bug 20492;
15896 bugfix on 0.2.3.9-alpha.
15898 o Minor bugfixes (directory authority):
15899 - When computing old Tor protocol line version in protover, we were
15900 looking at 0.2.7.5 twice instead of a specific case for
15901 0.2.9.1-alpha. Fixes bug 20810; bugfix on 0.2.9.4-alpha.
15903 o Minor bugfixes (download scheduling):
15904 - Resolve a "bug" warning when considering a download schedule whose
15905 delay had approached INT_MAX. Fixes 20875; bugfix on 0.2.9.5-alpha.
15907 o Minor bugfixes (logging):
15908 - Downgrade a harmless log message about the
15909 pending_entry_connections list from "warn" to "info". Mitigates
15912 o Minor bugfixes (memory leak):
15913 - Fix a small memory leak when receiving AF_UNIX connections on a
15914 SocksPort. Fixes bug 20716; bugfix on 0.2.6.3-alpha.
15915 - When moving a signed descriptor object from a source to an
15916 existing destination, free the allocated memory inside that
15917 destination object. Fixes bug 20715; bugfix on 0.2.8.3-alpha.
15919 o Minor bugfixes (memory leak, use-after-free, linux seccomp2 sandbox):
15920 - Fix a memory leak and use-after-free error when removing entries
15921 from the sandbox's getaddrinfo() cache. Fixes bug 20710; bugfix on
15922 0.2.5.5-alpha. Patch from "cypherpunks".
15924 o Minor bugfixes (portability):
15925 - Use the correct spelling of MAC_OS_X_VERSION_10_12 on configure.ac
15926 Fixes bug 20935; bugfix on 0.2.9.6-rc.
15928 o Minor bugfixes (unit tests):
15929 - Stop expecting NetBSD unit tests to report success for ipfw. Part
15930 of a fix for bug 19960; bugfix on 0.2.9.5-alpha.
15931 - Fix tolerances in unit tests for monotonic time comparisons
15932 between nanoseconds and microseconds. Previously, we accepted a 10
15933 us difference only, which is not realistic on every platform's
15934 clock_gettime(). Fixes bug 19974; bugfix on 0.2.9.1-alpha.
15935 - Remove a double-free in the single onion service unit test. Stop
15936 ignoring a return value. Make future changes less error-prone.
15937 Fixes bug 20864; bugfix on 0.2.9.6-rc.
15940 Changes in version 0.2.8.11 - 2016-12-08
15941 Tor 0.2.8.11 backports fixes for additional portability issues that
15942 could prevent Tor from building correctly on OSX Sierra, or with
15943 OpenSSL 1.1. Affected users should upgrade; others can safely stay
15946 o Minor bugfixes (portability):
15947 - Avoid compilation errors when building on OSX Sierra. Sierra began
15948 to support the getentropy() and clock_gettime() APIs, but created
15949 a few problems in doing so. Tor 0.2.9 has a more thorough set of
15950 workarounds; in 0.2.8, we are just using the /dev/urandom and mach
15951 monotonic time interfaces. Fixes bug 20865. Bugfix
15954 o Minor bugfixes (portability, backport from 0.2.9.5-alpha):
15955 - Fix compilation with OpenSSL 1.1 and less commonly-used CPU
15956 architectures. Closes ticket 20588.
15959 Changes in version 0.2.8.10 - 2016-12-02
15960 Tor 0.2.8.10 backports a fix for a bug that would sometimes make clients
15961 unusable after they left standby mode. It also backports fixes for
15962 a few portability issues and a small but problematic memory leak.
15964 o Major bugfixes (client reliability, backport from 0.2.9.5-alpha):
15965 - When Tor leaves standby because of a new application request, open
15966 circuits as needed to serve that request. Previously, we would
15967 potentially wait a very long time. Fixes part of bug 19969; bugfix
15970 o Major bugfixes (client performance, backport from 0.2.9.5-alpha):
15971 - Clients now respond to new application stream requests immediately
15972 when they arrive, rather than waiting up to one second before
15973 starting to handle them. Fixes part of bug 19969; bugfix
15976 o Minor bugfixes (portability, backport from 0.2.9.6-rc):
15977 - Work around a bug in the OSX 10.12 SDK that would prevent us from
15978 successfully targeting earlier versions of OSX. Resolves
15981 o Minor bugfixes (portability, backport from 0.2.9.5-alpha):
15982 - Fix implicit conversion warnings under OpenSSL 1.1. Fixes bug
15983 20551; bugfix on 0.2.1.1-alpha.
15985 o Minor bugfixes (relay, backport from 0.2.9.5-alpha):
15986 - Work around a memory leak in OpenSSL 1.1 when encoding public
15987 keys. Fixes bug 20553; bugfix on 0.0.2pre8.
15989 o Minor features (geoip):
15990 - Update geoip and geoip6 to the November 3 2016 Maxmind GeoLite2
15993 Changes in version 0.2.9.6-rc - 2016-12-02
15994 Tor 0.2.9.6-rc fixes a few remaining bugs found in the previous alpha
15995 version. We hope that it will be ready to become stable soon, and we
15996 encourage everyone to test this release. If no showstopper bugs are
15997 found here, the next 0.2.9 release will be stable.
15999 o Major bugfixes (relay, resolver, logging):
16000 - For relays that don't know their own address, avoid attempting a
16001 local hostname resolve for each descriptor we download. This
16002 will cut down on the number of "Success: chose address 'x.x.x.x'"
16003 log lines, and also avoid confusing clock jumps if the resolver
16004 is slow. Fixes bugs 20423 and 20610; bugfix on 0.2.8.1-alpha.
16006 o Minor bugfixes (client, fascistfirewall):
16007 - Avoid spurious warnings when ReachableAddresses or FascistFirewall
16008 is set. Fixes bug 20306; bugfix on 0.2.8.2-alpha.
16010 o Minor bugfixes (hidden services):
16011 - Stop ignoring the anonymity status of saved keys for hidden
16012 services and single onion services when first starting tor.
16013 Instead, refuse to start tor if any hidden service key has been
16014 used in a different hidden service anonymity mode. Fixes bug
16015 20638; bugfix on 17178 in 0.2.9.3-alpha; reported by ahf.
16017 o Minor bugfixes (portability):
16018 - Work around a bug in the OSX 10.12 SDK that would prevent us from
16019 successfully targeting earlier versions of OSX. Resolves
16021 - Run correctly when built on Windows build environments that
16022 require _vcsprintf(). Fixes bug 20560; bugfix on 0.2.2.11-alpha.
16024 o Minor bugfixes (single onion services, Tor2web):
16025 - Stop complaining about long-term one-hop circuits deliberately
16026 created by single onion services and Tor2web. These log messages
16027 are intended to diagnose issue 8387, which relates to circuits
16028 hanging around forever for no reason. Fixes bug 20613; bugfix on
16029 0.2.9.1-alpha. Reported by "pastly".
16031 o Minor bugfixes (unit tests):
16032 - Stop spurious failures in the local interface address discovery
16033 unit tests. Fixes bug 20634; bugfix on 0.2.8.1-alpha; patch by
16037 - Correct the minimum bandwidth value in torrc.sample, and queue a
16038 corresponding change for torrc.minimal. Closes ticket 20085.
16041 Changes in version 0.2.9.5-alpha - 2016-11-08
16042 Tor 0.2.9.5-alpha fixes numerous bugs discovered in the previous alpha
16043 version. We believe one or two probably remain, and we encourage
16044 everyone to test this release.
16046 o Major bugfixes (client performance):
16047 - Clients now respond to new application stream requests immediately
16048 when they arrive, rather than waiting up to one second before
16049 starting to handle them. Fixes part of bug 19969; bugfix
16052 o Major bugfixes (client reliability):
16053 - When Tor leaves standby because of a new application request, open
16054 circuits as needed to serve that request. Previously, we would
16055 potentially wait a very long time. Fixes part of bug 19969; bugfix
16058 o Major bugfixes (download scheduling):
16059 - When using an exponential backoff schedule, do not give up on
16060 downloading just because we have failed a bunch of times. Since
16061 each delay is longer than the last, retrying indefinitely won't
16062 hurt. Fixes bug 20536; bugfix on 0.2.9.1-alpha.
16063 - If a consensus expires while we are waiting for certificates to
16064 download, stop waiting for certificates.
16065 - If we stop waiting for certificates less than a minute after we
16066 started downloading them, do not consider the certificate download
16067 failure a separate failure. Fixes bug 20533; bugfix
16069 - Remove the maximum delay on exponential-backoff scheduling. Since
16070 we now allow an infinite number of failures (see ticket 20536), we
16071 must now allow the time to grow longer on each failure. Fixes part
16072 of bug 20534; bugfix on 0.2.9.1-alpha.
16073 - Make our initial download delays closer to those from 0.2.8. Fixes
16074 another part of bug 20534; bugfix on 0.2.9.1-alpha.
16075 - When determining when to download a directory object, handle times
16076 after 2038 if the operating system supports them. (Someday this
16077 will be important!) Fixes bug 20587; bugfix on 0.2.8.1-alpha.
16078 - When using exponential backoff in test networks, use a lower
16079 exponent, so the delays do not vary as much. This helps test
16080 networks bootstrap consistently. Fixes bug 20597; bugfix on 20499.
16082 o Minor features (geoip):
16083 - Update geoip and geoip6 to the November 3 2016 Maxmind GeoLite2
16086 o Minor bugfixes (client directory scheduling):
16087 - Treat "relay too busy to answer request" as a failed request and a
16088 reason to back off on our retry frequency. This is safe now that
16089 exponential backoffs retry indefinitely, and avoids a bug where we
16090 would reset our download schedule erroneously. Fixes bug 20593;
16091 bugfix on 0.2.9.1-alpha.
16093 o Minor bugfixes (client, logging):
16094 - Remove a BUG warning in circuit_pick_extend_handshake(). Instead,
16095 assume all nodes support EXTEND2. Use ntor whenever a key is
16096 available. Fixes bug 20472; bugfix on 0.2.9.3-alpha.
16097 - On DNSPort, stop logging a BUG warning on a failed hostname
16098 lookup. Fixes bug 19869; bugfix on 0.2.9.1-alpha.
16100 o Minor bugfixes (hidden services):
16101 - When configuring hidden services, check every hidden service
16102 directory's permissions. Previously, we only checked the last
16103 hidden service. Fixes bug 20529; bugfix the work to fix 13942
16106 o Minor bugfixes (portability):
16107 - Fix compilation with OpenSSL 1.1 and less commonly-used CPU
16108 architectures. Closes ticket 20588.
16109 - Use ECDHE ciphers instead of ECDH in tortls tests. LibreSSL has
16110 removed the ECDH ciphers which caused the tests to fail on
16111 platforms which use it. Fixes bug 20460; bugfix on 0.2.8.1-alpha.
16112 - Fix implicit conversion warnings under OpenSSL 1.1. Fixes bug
16113 20551; bugfix on 0.2.1.1-alpha.
16115 o Minor bugfixes (relay bootstrap):
16116 - Ensure relays don't make multiple connections during bootstrap.
16117 Fixes bug 20591; bugfix on 0.2.8.1-alpha.
16119 o Minor bugfixes (relay):
16120 - Work around a memory leak in OpenSSL 1.1 when encoding public
16121 keys. Fixes bug 20553; bugfix on 0.0.2pre8.
16122 - Avoid a small memory leak when informing worker threads about
16123 rotated onion keys. Fixes bug 20401; bugfix on 0.2.6.3-alpha.
16124 - Do not try to parallelize workers more than 16x without the user
16125 explicitly configuring us to do so, even if we do detect more than
16126 16 CPU cores. Fixes bug 19968; bugfix on 0.2.3.1-alpha.
16128 o Minor bugfixes (single onion services):
16129 - Start correctly when creating a single onion service in a
16130 directory that did not previously exist. Fixes bug 20484; bugfix
16133 o Minor bugfixes (testing):
16134 - Avoid a unit test failure on systems with over 16 detectable CPU
16135 cores. Fixes bug 19968; bugfix on 0.2.3.1-alpha.
16138 - Clarify that setting HiddenServiceNonAnonymousMode requires you to
16139 also set "SOCKSPort 0". Fixes bug 20487; bugfix on 0.2.9.3-alpha.
16140 - Module-level documentation for several more modules. Closes
16141 tickets 19287 and 19290.
16144 Changes in version 0.2.8.9 - 2016-10-17
16145 Tor 0.2.8.9 backports a fix for a security hole in previous versions
16146 of Tor that would allow a remote attacker to crash a Tor client,
16147 hidden service, relay, or authority. All Tor users should upgrade to
16148 this version, or to 0.2.9.4-alpha. Patches will be released for older
16151 o Major features (security fixes, also in 0.2.9.4-alpha):
16152 - Prevent a class of security bugs caused by treating the contents
16153 of a buffer chunk as if they were a NUL-terminated string. At
16154 least one such bug seems to be present in all currently used
16155 versions of Tor, and would allow an attacker to remotely crash
16156 most Tor instances, especially those compiled with extra compiler
16157 hardening. With this defense in place, such bugs can't crash Tor,
16158 though we should still fix them as they occur. Closes ticket
16159 20384 (TROVE-2016-10-001).
16161 o Minor features (geoip):
16162 - Update geoip and geoip6 to the October 4 2016 Maxmind GeoLite2
16166 Changes in version 0.2.9.4-alpha - 2016-10-17
16167 Tor 0.2.9.4-alpha fixes a security hole in previous versions of Tor
16168 that would allow a remote attacker to crash a Tor client, hidden
16169 service, relay, or authority. All Tor users should upgrade to this
16170 version, or to 0.2.8.9. Patches will be released for older versions
16173 Tor 0.2.9.4-alpha also adds numerous small features and fix-ups to
16174 previous versions of Tor, including the implementation of a feature to
16175 future- proof the Tor ecosystem against protocol changes, some bug
16176 fixes necessary for Tor Browser to use unix domain sockets correctly,
16177 and several portability improvements. We anticipate that this will be
16178 the last alpha in the Tor 0.2.9 series, and that the next release will
16179 be a release candidate.
16181 o Major features (security fixes):
16182 - Prevent a class of security bugs caused by treating the contents
16183 of a buffer chunk as if they were a NUL-terminated string. At
16184 least one such bug seems to be present in all currently used
16185 versions of Tor, and would allow an attacker to remotely crash
16186 most Tor instances, especially those compiled with extra compiler
16187 hardening. With this defense in place, such bugs can't crash Tor,
16188 though we should still fix them as they occur. Closes ticket
16189 20384 (TROVE-2016-10-001).
16191 o Major features (subprotocol versions):
16192 - Tor directory authorities now vote on a set of recommended
16193 subprotocol versions, and on a set of required subprotocol
16194 versions. Clients and relays that lack support for a _required_
16195 subprotocol version will not start; those that lack support for a
16196 _recommended_ subprotocol version will warn the user to upgrade.
16197 Closes ticket 19958; implements part of proposal 264.
16198 - Tor now uses "subprotocol versions" to indicate compatibility.
16199 Previously, versions of Tor looked at the declared Tor version of
16200 a relay to tell whether they could use a given feature. Now, they
16201 should be able to rely on its declared subprotocol versions. This
16202 change allows compatible implementations of the Tor protocol(s) to
16203 exist without pretending to be 100% bug-compatible with particular
16204 releases of Tor itself. Closes ticket 19958; implements part of
16207 o Minor feature (fallback directories):
16208 - Remove broken fallbacks from the hard-coded fallback directory
16209 list. Closes ticket 20190; patch by teor.
16211 o Minor features (client, directory):
16212 - Since authorities now omit all routers that lack the Running and
16213 Valid flags, we assume that any relay listed in the consensus must
16214 have those flags. Closes ticket 20001; implements part of
16217 o Minor features (compilation, portability):
16218 - Compile correctly on MacOS 10.12 (aka "Sierra"). Closes
16221 o Minor features (development tools, etags):
16222 - Teach the "make tags" Makefile target how to correctly find
16223 "MOCK_IMPL" function definitions. Patch from nherring; closes
16226 o Minor features (geoip):
16227 - Update geoip and geoip6 to the October 4 2016 Maxmind GeoLite2
16230 o Minor features (unix domain sockets):
16231 - When configuring a unix domain socket for a SocksPort,
16232 ControlPort, or Hidden service, you can now wrap the address in
16233 quotes, using C-style escapes inside the quotes. This allows unix
16234 domain socket paths to contain spaces.
16236 o Minor features (virtual addresses):
16237 - Increase the maximum number of bits for the IPv6 virtual network
16238 prefix from 16 to 104. In this way, the condition for address
16239 allocation is less restrictive. Closes ticket 20151; feature
16242 o Minor bugfixes (address discovery):
16243 - Stop reordering IP addresses returned by the OS. This makes it
16244 more likely that Tor will guess the same relay IP address every
16245 time. Fixes issue 20163; bugfix on 0.2.7.1-alpha, ticket 17027.
16246 Reported by René Mayrhofer, patch by "cypherpunks".
16248 o Minor bugfixes (client, unix domain sockets):
16249 - Disable IsolateClientAddr when using AF_UNIX backed SocksPorts as
16250 the client address is meaningless. Fixes bug 20261; bugfix
16253 o Minor bugfixes (compilation, OpenBSD):
16254 - Detect Libevent2 functions correctly on systems that provide
16255 libevent2, but where libevent1 is linked with -levent. Fixes bug
16256 19904; bugfix on 0.2.2.24-alpha. Patch from Rubiate.
16258 o Minor bugfixes (configuration):
16259 - When parsing quoted configuration values from the torrc file,
16260 handle windows line endings correctly. Fixes bug 19167; bugfix on
16261 0.2.0.16-alpha. Patch from "Pingl".
16263 o Minor bugfixes (getpass):
16264 - Defensively fix a non-triggerable heap corruption at do_getpass()
16265 to protect ourselves from mistakes in the future. Fixes bug
16266 19223; bugfix on 0.2.7.3-rc. Bug found by Guido Vranken, patch
16269 o Minor bugfixes (hidden service):
16270 - Allow hidden services to run on IPv6 addresses even when the
16271 IPv6Exit option is not set. Fixes bug 18357; bugfix
16275 - Add module-level internal documentation for 36 C files that
16276 previously didn't have a high-level overview. Closes ticket #20385.
16278 o Required libraries:
16279 - When building with OpenSSL, Tor now requires version 1.0.1 or
16280 later. OpenSSL 1.0.0 and earlier are no longer supported by the
16281 OpenSSL team, and should not be used. Closes ticket 20303.
16284 Changes in version 0.2.9.3-alpha - 2016-09-23
16285 Tor 0.2.9.3-alpha adds improved support for entities that want to make
16286 high-performance services available through the Tor .onion mechanism
16287 without themselves receiving anonymity as they host those services. It
16288 also tries harder to ensure that all steps on a circuit are using the
16289 strongest crypto possible, strengthens some TLS properties, and
16290 resolves several bugs -- including a pair of crash bugs from the 0.2.8
16291 series. Anybody running an earlier version of 0.2.9.x should upgrade.
16293 o Major bugfixes (crash, also in 0.2.8.8):
16294 - Fix a complicated crash bug that could affect Tor clients
16295 configured to use bridges when replacing a networkstatus consensus
16296 in which one of their bridges was mentioned. OpenBSD users saw
16297 more crashes here, but all platforms were potentially affected.
16298 Fixes bug 20103; bugfix on 0.2.8.2-alpha.
16300 o Major bugfixes (relay, OOM handler, also in 0.2.8.8):
16301 - Fix a timing-dependent assertion failure that could occur when we
16302 tried to flush from a circuit after having freed its cells because
16303 of an out-of-memory condition. Fixes bug 20203; bugfix on
16304 0.2.8.1-alpha. Thanks to "cypherpunks" for help diagnosing
16307 o Major features (circuit building, security):
16308 - Authorities, relays and clients now require ntor keys in all
16309 descriptors, for all hops (except for rare hidden service protocol
16310 cases), for all circuits, and for all other roles. Part of
16312 - Tor authorities, relays, and clients only use ntor, except for
16313 rare cases in the hidden service protocol. Part of ticket 19163.
16315 o Major features (single-hop "hidden" services):
16316 - Add experimental HiddenServiceSingleHopMode and
16317 HiddenServiceNonAnonymousMode options. When both are set to 1,
16318 every hidden service on a Tor instance becomes a non-anonymous
16319 Single Onion Service. Single Onions make one-hop (direct)
16320 connections to their introduction and rendezvous points. One-hop
16321 circuits make Single Onion servers easily locatable, but clients
16322 remain location-anonymous. This is compatible with the existing
16323 hidden service implementation, and works on the current tor
16324 network without any changes to older relays or clients. Implements
16325 proposal 260, completes ticket 17178. Patch by teor and asn.
16327 o Major features (resource management):
16328 - Tor can now notice it is about to run out of sockets, and
16329 preemptively close connections of lower priority. (This feature is
16330 off by default for now, since the current prioritizing method is
16331 yet not mature enough. You can enable it by setting
16332 "DisableOOSCheck 0", but watch out: it might close some sockets
16333 you would rather have it keep.) Closes ticket 18640.
16335 o Major bugfixes (circuit building):
16336 - Hidden service client-to-intro-point and service-to-rendezvous-
16337 point circuits use the TAP key supplied by the protocol, to avoid
16338 epistemic attacks. Fixes bug 19163; bugfix on 0.2.4.18-rc.
16340 o Major bugfixes (compilation, OpenBSD):
16341 - Fix a Libevent-detection bug in our autoconf script that would
16342 prevent Tor from linking successfully on OpenBSD. Patch from
16343 rubiate. Fixes bug 19902; bugfix on 0.2.9.1-alpha.
16345 o Major bugfixes (hidden services):
16346 - Clients now require hidden services to include the TAP keys for
16347 their intro points in the hidden service descriptor. This prevents
16348 an inadvertent upgrade to ntor, which a malicious hidden service
16349 could use to distinguish clients by consensus version. Fixes bug
16350 20012; bugfix on 0.2.4.8-alpha. Patch by teor.
16352 o Minor features (security, TLS):
16353 - Servers no longer support clients that without AES ciphersuites.
16354 (3DES is no longer considered an acceptable cipher.) We believe
16355 that no such Tor clients currently exist, since Tor has required
16356 OpenSSL 0.9.7 or later since 2009. Closes ticket 19998.
16358 o Minor feature (fallback directories):
16359 - Remove 8 fallbacks that are no longer suitable, leaving 81 of the
16360 100 fallbacks originally introduced in Tor 0.2.8.2-alpha in March
16361 2016. Closes ticket 20190; patch by teor.
16363 o Minor features (geoip, also in 0.2.8.8):
16364 - Update geoip and geoip6 to the September 6 2016 Maxmind GeoLite2
16367 o Minor feature (port flags):
16368 - Add new flags to the *Port options to finer control over which
16369 requests are allowed. The flags are NoDNSRequest, NoOnionTraffic,
16370 and the synthetic flag OnionTrafficOnly, which is equivalent to
16371 NoDNSRequest, NoIPv4Traffic, and NoIPv6Traffic. Closes enhancement
16372 18693; patch by "teor".
16374 o Minor features (directory authority):
16375 - After voting, if the authorities decide that a relay is not
16376 "Valid", they no longer include it in the consensus at all. Closes
16377 ticket 20002; implements part of proposal 272.
16379 o Minor features (testing):
16380 - Disable memory protections on OpenBSD when performing our unit
16381 tests for memwipe(). The test deliberately invokes undefined
16382 behavior, and the OpenBSD protections interfere with this. Patch
16383 from "rubiate". Closes ticket 20066.
16385 o Minor features (testing, ipv6):
16386 - Add the single-onion and single-onion-ipv6 chutney targets to
16387 "make test-network-all". This requires a recent chutney version
16388 with the single onion network flavours (git c72a652 or later).
16389 Closes ticket 20072; patch by teor.
16390 - Add the hs-ipv6 chutney target to make test-network-all's IPv6
16391 tests. Remove bridges+hs, as it's somewhat redundant. This
16392 requires a recent chutney version that supports IPv6 clients,
16393 relays, and authorities. Closes ticket 20069; patch by teor.
16395 o Minor features (Tor2web):
16396 - Make Tor2web clients respect ReachableAddresses. This feature was
16397 inadvertently enabled in 0.2.8.6, then removed by bugfix 19973 on
16398 0.2.8.7. Implements feature 20034. Patch by teor.
16400 o Minor features (unit tests):
16401 - We've done significant work to make the unit tests run faster.
16402 - Our link-handshake unit tests now check that when invalid
16403 handshakes fail, they fail with the error messages we expected.
16404 - Our unit testing code that captures log messages no longer
16405 prevents them from being written out if the user asked for them
16406 (by passing --debug or --info or or --notice --warn to the "test"
16407 binary). This change prevents us from missing unexpected log
16408 messages simply because we were looking for others. Related to
16410 - The unit tests now log all warning messages with the "BUG" flag.
16411 Previously, they only logged errors by default. This change will
16412 help us make our testing code more correct, and make sure that we
16413 only hit this code when we mean to. In the meantime, however,
16414 there will be more warnings in the unit test logs than before.
16415 This is preparatory work for ticket 19999.
16416 - The unit tests now treat any failure of a "tor_assert_nonfatal()"
16417 assertion as a test failure.
16419 o Minor bug fixes (circuits):
16420 - Use the CircuitBuildTimeout option whenever
16421 LearnCircuitBuildTimeout is disabled. Previously, we would respect
16422 the option when a user disabled it, but not when it was disabled
16423 because some other option was set. Fixes bug 20073; bugfix on
16424 0.2.4.12-alpha. Patch by teor.
16426 o Minor bugfixes (allocation):
16427 - Change how we allocate memory for large chunks on buffers, to
16428 avoid a (currently impossible) integer overflow, and to waste less
16429 space when allocating unusually large chunks. Fixes bug 20081;
16430 bugfix on 0.2.0.16-alpha. Issue identified by Guido Vranken.
16431 - Always include orconfig.h before including any other C headers.
16432 Sometimes, it includes macros that affect the behavior of the
16433 standard headers. Fixes bug 19767; bugfix on 0.2.9.1-alpha (the
16434 first version to use AC_USE_SYSTEM_EXTENSIONS).
16435 - Fix a syntax error in the IF_BUG_ONCE__() macro in non-GCC-
16436 compatible compilers. Fixes bug 20141; bugfix on 0.2.9.1-alpha.
16437 Patch from Gisle Vanem.
16438 - Stop trying to build with Clang 4.0's -Wthread-safety warnings.
16439 They apparently require a set of annotations that we aren't
16440 currently using, and they create false positives in our pthreads
16441 wrappers. Fixes bug 20110; bugfix on 0.2.9.1-alpha.
16443 o Minor bugfixes (directory authority):
16444 - Die with a more useful error when the operator forgets to place
16445 the authority_signing_key file into the keys directory. This
16446 avoids an uninformative assert & traceback about having an invalid
16447 key. Fixes bug 20065; bugfix on 0.2.0.1-alpha.
16448 - When allowing private addresses, mark Exits that only exit to
16449 private locations as such. Fixes bug 20064; bugfix
16452 o Minor bugfixes (documentation):
16453 - Document the default PathsNeededToBuildCircuits value that's used
16454 by clients when the directory authorities don't set
16455 min_paths_for_circs_pct. Fixes bug 20117; bugfix on 02c320916e02
16456 in 0.2.4.10-alpha. Patch by teor, reported by Jesse V.
16457 - Fix manual for the User option: it takes a username, not a UID.
16458 Fixes bug 19122; bugfix on 0.0.2pre16 (the first version to have
16461 o Minor bugfixes (hidden services):
16462 - Stop logging intro point details to the client log on certain
16463 error conditions. Fixed as part of bug 20012; bugfix on
16464 0.2.4.8-alpha. Patch by teor.
16466 o Minor bugfixes (IPv6, testing):
16467 - Check for IPv6 correctly on Linux when running test networks.
16468 Fixes bug 19905; bugfix on 0.2.7.3-rc; patch by teor.
16470 o Minor bugfixes (Linux seccomp2 sandbox):
16471 - Add permission to run the sched_yield() and sigaltstack() system
16472 calls, in order to support versions of Tor compiled with asan or
16473 ubsan code that use these calls. Now "sandbox 1" and
16474 "--enable-expensive-hardening" should be compatible on more
16475 systems. Fixes bug 20063; bugfix on 0.2.5.1-alpha.
16477 o Minor bugfixes (logging):
16478 - When logging a message from the BUG() macro, be explicit about
16479 what we were asserting. Previously we were confusing what we were
16480 asserting with what the bug was. Fixes bug 20093; bugfix
16482 - When we are unable to remove the bw_accounting file, do not warn
16483 if the reason we couldn't remove it was that it didn't exist.
16484 Fixes bug 19964; bugfix on 0.2.5.4-alpha. Patch from 'pastly'.
16486 o Minor bugfixes (option parsing):
16487 - Count unix sockets when counting client listeners (SOCKS, Trans,
16488 NATD, and DNS). This has no user-visible behaviour changes: these
16489 options are set once, and never read. Required for correct
16490 behaviour in ticket 17178. Fixes bug 19677; bugfix on
16491 0.2.6.3-alpha. Patch by teor.
16493 o Minor bugfixes (options):
16494 - Check the consistency of UseEntryGuards and EntryNodes more
16495 reliably. Fixes bug 20074; bugfix on 0.2.4.12-alpha. Patch
16497 - Stop changing the configured value of UseEntryGuards on
16498 authorities and Tor2web clients. Fixes bug 20074; bugfix on
16499 commits 51fc6799 in 0.1.1.16-rc and acda1735 in 0.2.4.3-alpha.
16502 o Minor bugfixes (Tor2web):
16503 - Prevent Tor2web clients running hidden services, these services
16504 are not anonymous due to the one-hop client paths. Fixes bug
16505 19678. Patch by teor.
16507 o Minor bugfixes (unit tests):
16508 - Fix a shared-random unit test that was failing on big endian
16509 architectures due to internal representation of a integer copied
16510 to a buffer. The test is changed to take a full 32 bytes of data
16511 and use the output of a python script that make the COMMIT and
16512 REVEAL calculation according to the spec. Fixes bug 19977; bugfix
16514 - The tor_tls_server_info_callback unit test no longer crashes when
16515 debug-level logging is turned on. Fixes bug 20041; bugfix
16519 Changes in version 0.2.8.8 - 2016-09-23
16520 Tor 0.2.8.8 fixes two crash bugs present in previous versions of the
16521 0.2.8.x series. Relays running 0.2.8.x should upgrade, as should users
16522 who select public relays as their bridges.
16524 o Major bugfixes (crash):
16525 - Fix a complicated crash bug that could affect Tor clients
16526 configured to use bridges when replacing a networkstatus consensus
16527 in which one of their bridges was mentioned. OpenBSD users saw
16528 more crashes here, but all platforms were potentially affected.
16529 Fixes bug 20103; bugfix on 0.2.8.2-alpha.
16531 o Major bugfixes (relay, OOM handler):
16532 - Fix a timing-dependent assertion failure that could occur when we
16533 tried to flush from a circuit after having freed its cells because
16534 of an out-of-memory condition. Fixes bug 20203; bugfix on
16535 0.2.8.1-alpha. Thanks to "cypherpunks" for help diagnosing
16538 o Minor feature (fallback directories):
16539 - Remove 8 fallbacks that are no longer suitable, leaving 81 of the
16540 100 fallbacks originally introduced in Tor 0.2.8.2-alpha in March
16541 2016. Closes ticket 20190; patch by teor.
16543 o Minor features (geoip):
16544 - Update geoip and geoip6 to the September 6 2016 Maxmind GeoLite2
16548 Changes in version 0.2.9.2-alpha - 2016-08-24
16549 Tor 0.2.9.2-alpha continues development of the 0.2.9 series with
16550 several new features and bugfixes. It also includes an important
16551 authority update and an important bugfix from 0.2.8.7. Everyone who
16552 sets the ReachableAddresses option, and all bridges, are strongly
16553 encouraged to upgrade to 0.2.8.7, or to 0.2.9.2-alpha.
16555 o Directory authority changes (also in 0.2.8.7):
16556 - The "Tonga" bridge authority has been retired; the new bridge
16557 authority is "Bifroest". Closes tickets 19728 and 19690.
16559 o Major bugfixes (client, security, also in 0.2.8.7):
16560 - Only use the ReachableAddresses option to restrict the first hop
16561 in a path. In earlier versions of 0.2.8.x, it would apply to
16562 every hop in the path, with a possible degradation in anonymity
16563 for anyone using an uncommon ReachableAddress setting. Fixes bug
16564 19973; bugfix on 0.2.8.2-alpha.
16566 o Major features (user interface):
16567 - Tor now supports the ability to declare options deprecated, so
16568 that we can recommend that people stop using them. Previously,
16569 this was done in an ad-hoc way. Closes ticket 19820.
16571 o Major bugfixes (directory downloads):
16572 - Avoid resetting download status for consensuses hourly, since we
16573 already have another, smarter retry mechanism. Fixes bug 8625;
16574 bugfix on 0.2.0.9-alpha.
16576 o Minor features (config):
16577 - Warn users when descriptor and port addresses are inconsistent.
16578 Mitigates bug 13953; patch by teor.
16580 o Minor features (geoip):
16581 - Update geoip and geoip6 to the August 2 2016 Maxmind GeoLite2
16584 o Minor features (user interface):
16585 - There is a new --list-deprecated-options command-line option to
16586 list all of the deprecated options. Implemented as part of
16589 o Minor bugfixes (code style):
16590 - Fix an integer signedness conversion issue in the case conversion
16591 tables. Fixes bug 19168; bugfix on 0.2.1.11-alpha.
16593 o Minor bugfixes (compilation):
16594 - Build correctly on versions of libevent2 without support for
16595 evutil_secure_rng_add_bytes(). Fixes bug 19904; bugfix
16597 - Fix a compilation warning on GCC versions before 4.6. Our
16598 ENABLE_GCC_WARNING macro used the word "warning" as an argument,
16599 when it is also required as an argument to the compiler pragma.
16600 Fixes bug 19901; bugfix on 0.2.9.1-alpha.
16602 o Minor bugfixes (compilation, also in 0.2.8.7):
16603 - Remove an inappropriate "inline" in tortls.c that was causing
16604 warnings on older versions of GCC. Fixes bug 19903; bugfix
16607 o Minor bugfixes (fallback directories, also in 0.2.8.7):
16608 - Avoid logging a NULL string pointer when loading fallback
16609 directory information. Fixes bug 19947; bugfix on 0.2.4.7-alpha
16610 and 0.2.8.1-alpha. Report and patch by "rubiate".
16612 o Minor bugfixes (logging):
16613 - Log a more accurate message when we fail to dump a microdescriptor.
16614 Fixes bug 17758; bugfix on 0.2.2.8-alpha. Patch from Daniel Pinto.
16616 o Minor bugfixes (memory leak):
16617 - Fix a series of slow memory leaks related to parsing torrc files
16618 and options. Fixes bug 19466; bugfix on 0.2.1.6-alpha.
16620 o Deprecated features:
16621 - A number of DNS-cache-related sub-options for client ports are now
16622 deprecated for security reasons, and may be removed in a future
16623 version of Tor. (We believe that client-side DNS caching is a bad
16624 idea for anonymity, and you should not turn it on.) The options
16625 are: CacheDNS, CacheIPv4DNS, CacheIPv6DNS, UseDNSCache,
16626 UseIPv4Cache, and UseIPv6Cache.
16627 - A number of options are deprecated for security reasons, and may
16628 be removed in a future version of Tor. The options are:
16629 AllowDotExit, AllowInvalidNodes, AllowSingleHopCircuits,
16630 AllowSingleHopExits, ClientDNSRejectInternalAddresses,
16631 CloseHSClientCircuitsImmediatelyOnTimeout,
16632 CloseHSServiceRendCircuitsImmediatelyOnTimeout,
16633 ExcludeSingleHopRelays, FastFirstHopPK, TLSECGroup,
16634 UseNTorHandshake, and WarnUnsafeSocks.
16635 - The *ListenAddress options are now deprecated as unnecessary: the
16636 corresponding *Port options should be used instead. These options
16637 may someday be removed. The affected options are:
16638 ControlListenAddress, DNSListenAddress, DirListenAddress,
16639 NATDListenAddress, ORListenAddress, SocksListenAddress,
16640 and TransListenAddress.
16643 - Correct the IPv6 syntax in our documentation for the
16644 VirtualAddrNetworkIPv6 torrc option. Closes ticket 19743.
16647 - We no longer include the (dead, deprecated) bufferevent code in
16648 Tor. Closes ticket 19450. Based on a patch from U+039b.
16651 Changes in version 0.2.8.7 - 2016-08-24
16652 Tor 0.2.8.7 fixes an important bug related to the ReachableAddresses
16653 option in 0.2.8.6, and replaces a retiring bridge authority. Everyone
16654 who sets the ReachableAddresses option, and all bridges, are strongly
16655 encouraged to upgrade.
16657 o Directory authority changes:
16658 - The "Tonga" bridge authority has been retired; the new bridge
16659 authority is "Bifroest". Closes tickets 19728 and 19690.
16661 o Major bugfixes (client, security):
16662 - Only use the ReachableAddresses option to restrict the first hop
16663 in a path. In earlier versions of 0.2.8.x, it would apply to
16664 every hop in the path, with a possible degradation in anonymity
16665 for anyone using an uncommon ReachableAddress setting. Fixes bug
16666 19973; bugfix on 0.2.8.2-alpha.
16668 o Minor features (geoip):
16669 - Update geoip and geoip6 to the August 2 2016 Maxmind GeoLite2
16672 o Minor bugfixes (compilation):
16673 - Remove an inappropriate "inline" in tortls.c that was causing
16674 warnings on older versions of GCC. Fixes bug 19903; bugfix
16677 o Minor bugfixes (fallback directories):
16678 - Avoid logging a NULL string pointer when loading fallback
16679 directory information. Fixes bug 19947; bugfix on 0.2.4.7-alpha
16680 and 0.2.8.1-alpha. Report and patch by "rubiate".
16683 Changes in version 0.2.9.1-alpha - 2016-08-08
16684 Tor 0.2.9.1-alpha is the first alpha release in the 0.2.9 development
16685 series. It improves our support for hardened builds and compiler
16686 warnings, deploys some critical infrastructure for improvements to
16687 hidden services, includes a new timing backend that we hope to use for
16688 better support for traffic padding, makes it easier for programmers to
16689 log unexpected events, and contains other small improvements to
16690 security, correctness, and performance.
16692 Below are the changes since 0.2.8.6.
16694 o New system requirements:
16695 - Tor now requires Libevent version 2.0.10-stable or later. Older
16696 versions of Libevent have less efficient backends for several
16697 platforms, and lack the DNS code that we use for our server-side
16698 DNS support. This implements ticket 19554.
16699 - Tor now requires zlib version 1.2 or later, for security,
16700 efficiency, and (eventually) gzip support. (Back when we started,
16701 zlib 1.1 and zlib 1.0 were still found in the wild. 1.2 was
16702 released in 2003. We recommend the latest version.)
16704 o Major features (build, hardening):
16705 - Tor now builds with -ftrapv by default on compilers that support
16706 it. This option detects signed integer overflow (which C forbids),
16707 and turns it into a hard-failure. We do not apply this option to
16708 code that needs to run in constant time to avoid side-channels;
16709 instead, we use -fwrapv in that code. Closes ticket 17983.
16710 - When --enable-expensive-hardening is selected, stop applying the
16711 clang/gcc sanitizers to code that needs to run in constant time.
16712 Although we are aware of no introduced side-channels, we are not
16713 able to prove that there are none. Related to ticket 17983.
16715 o Major features (compilation):
16716 - Our big list of extra GCC warnings is now enabled by default when
16717 building with GCC (or with anything like Clang that claims to be
16718 GCC-compatible). To make all warnings into fatal compilation
16719 errors, pass --enable-fatal-warnings to configure. Closes
16721 - Use the Autoconf macro AC_USE_SYSTEM_EXTENSIONS to automatically
16722 turn on C and POSIX extensions. (Previously, we attempted to do
16723 this on an ad hoc basis.) Closes ticket 19139.
16725 o Major features (directory authorities, hidden services):
16726 - Directory authorities can now perform the shared randomness
16727 protocol specified by proposal 250. Using this protocol, directory
16728 authorities generate a global fresh random value every day. In the
16729 future, this value will be used by hidden services to select
16730 HSDirs. This release implements the directory authority feature;
16731 the hidden service side will be implemented in the future as part
16732 of proposal 224. Resolves ticket 16943; implements proposal 250.
16734 o Major features (downloading, random exponential backoff):
16735 - When we fail to download an object from a directory service, wait
16736 for an (exponentially increasing) randomized amount of time before
16737 retrying, rather than a fixed interval as we did before. This
16738 prevents a group of Tor instances from becoming too synchronized,
16739 or a single Tor instance from becoming too predictable, in its
16740 download schedule. Closes ticket 15942.
16742 o Major bugfixes (exit policies):
16743 - Avoid disclosing exit outbound bind addresses, configured port
16744 bind addresses, and local interface addresses in relay descriptors
16745 by default under ExitPolicyRejectPrivate. Instead, only reject
16746 these (otherwise unlisted) addresses if
16747 ExitPolicyRejectLocalInterfaces is set. Fixes bug 18456; bugfix on
16748 0.2.7.2-alpha. Patch by teor.
16750 o Major bugfixes (hidden service client):
16751 - Allow Tor clients with appropriate controllers to work with
16752 FetchHidServDescriptors set to 0. Previously, this option also
16753 disabled descriptor cache lookup, thus breaking hidden services
16754 entirely. Fixes bug 18704; bugfix on 0.2.0.20-rc. Patch by "twim".
16756 o Minor features (build, hardening):
16757 - Detect and work around a libclang_rt problem that would prevent
16758 clang from finding __mulodi4() on some 32-bit platforms, and thus
16759 keep -ftrapv from linking on those systems. Closes ticket 19079.
16760 - When building on a system without runtime support for the runtime
16761 hardening options, try to log a useful warning at configuration
16762 time, rather than an incomprehensible warning at link time. If
16763 expensive hardening was requested, this warning becomes an error.
16764 Closes ticket 18895.
16766 o Minor features (code safety):
16767 - In our integer-parsing functions, ensure that maxiumum value we
16768 give is no smaller than the minimum value. Closes ticket 19063;
16771 o Minor features (controller):
16772 - Implement new GETINFO queries for all downloads that use
16773 download_status_t to schedule retries. This allows controllers to
16774 examine the schedule for pending downloads. Closes ticket 19323.
16775 - Allow controllers to configure basic client authorization on
16776 hidden services when they create them with the ADD_ONION control
16777 command. Implements ticket 15588. Patch by "special".
16778 - Fire a STATUS_SERVER controller event whenever the hibernation
16779 status changes between "awake"/"soft"/"hard". Closes ticket 18685.
16781 o Minor features (directory authority):
16782 - Directory authorities now only give the Guard flag to a relay if
16783 they are also giving it the Stable flag. This change allows us to
16784 simplify path selection for clients. It should have minimal effect
16785 in practice, since >99% of Guards already have the Stable flag.
16786 Implements ticket 18624.
16787 - Directory authorities now write their v3-status-votes file out to
16788 disk earlier in the consensus process, so we have a record of the
16789 votes even if we abort the consensus process. Resolves
16792 o Minor features (hidden service):
16793 - Stop being so strict about the payload length of "rendezvous1"
16794 cells. We used to be locked in to the "TAP" handshake length, and
16795 now we can handle better handshakes like "ntor". Resolves
16798 o Minor features (infrastructure, time):
16799 - Tor now uses the operating system's monotonic timers (where
16800 available) for internal fine-grained timing. Previously we would
16801 look at the system clock, and then attempt to compensate for the
16802 clock running backwards. Closes ticket 18908.
16803 - Tor now includes an improved timer backend, so that we can
16804 efficiently support tens or hundreds of thousands of concurrent
16805 timers, as will be needed for some of our planned anti-traffic-
16806 analysis work. This code is based on William Ahern's "timeout.c"
16807 project, which implements a "tickless hierarchical timing wheel".
16808 Closes ticket 18365.
16810 o Minor features (logging):
16811 - Provide a more useful warning message when configured with an
16812 invalid Nickname. Closes ticket 18300; patch from "icanhasaccount".
16813 - When dumping unparseable router descriptors, optionally store them
16814 in separate files, named by digest, up to a configurable size
16815 limit. You can change the size limit by setting the
16816 MaxUnparseableDescSizeToLog option, and disable this feature by
16817 setting that option to 0. Closes ticket 18322.
16818 - Add a set of macros to check nonfatal assertions, for internal
16819 use. Migrating more of our checks to these should help us avoid
16820 needless crash bugs. Closes ticket 18613.
16822 o Minor features (performance):
16823 - Change the "optimistic data" extension from "off by default" to
16824 "on by default". The default was ordinarily overridden by a
16825 consensus option, but when clients were bootstrapping for the
16826 first time, they would not have a consensus to get the option
16827 from. Changing this default saves a round-trip during startup.
16828 Closes ticket 18815.
16830 o Minor features (relay, usability):
16831 - When the directory authorities refuse a bad relay's descriptor,
16832 encourage the relay operator to contact us. Many relay operators
16833 won't notice this line in their logs, but it's a win if even a few
16834 learn why we don't like what their relay was doing. Resolves
16837 o Minor features (testing):
16838 - Let backtrace tests work correctly under AddressSanitizer. Fixes
16839 part of bug 18934; bugfix on 0.2.5.2-alpha.
16840 - Move the test-network.sh script to chutney, and modify tor's test-
16841 network.sh to call the (newer) chutney version when available.
16842 Resolves ticket 19116. Patch by teor.
16843 - Use the lcov convention for marking lines as unreachable, so that
16844 we don't count them when we're generating test coverage data.
16845 Update our coverage tools to understand this convention. Closes
16848 o Minor bugfixes (bootstrap):
16849 - Remember the directory we fetched the consensus or previous
16850 certificates from, and use it to fetch future authority
16851 certificates. This change improves bootstrapping performance.
16852 Fixes bug 18963; bugfix on 0.2.8.1-alpha.
16854 o Minor bugfixes (build):
16855 - The test-stem and test-network makefile targets now depend only on
16856 the tor binary that they are testing. Previously, they depended on
16857 "make all". Fixes bug 18240; bugfix on 0.2.8.2-alpha. Based on a
16858 patch from "cypherpunks".
16860 o Minor bugfixes (circuits):
16861 - Make sure extend_info_from_router() is only called on servers.
16862 Fixes bug 19639; bugfix on 0.2.8.1-alpha.
16864 o Minor bugfixes (compilation):
16865 - When building with Clang, use a full set of GCC warnings.
16866 (Previously, we included only a subset, because of the way we
16867 detected them.) Fixes bug 19216; bugfix on 0.2.0.1-alpha.
16869 o Minor bugfixes (directory authority):
16870 - Authorities now sort the "package" lines in their votes, for ease
16871 of debugging. (They are already sorted in consensus documents.)
16872 Fixes bug 18840; bugfix on 0.2.6.3-alpha.
16873 - When parsing a detached signature, make sure we use the length of
16874 the digest algorithm instead of an hardcoded DIGEST256_LEN in
16875 order to avoid comparing bytes out-of-bounds with a smaller digest
16876 length such as SHA1. Fixes bug 19066; bugfix on 0.2.2.6-alpha.
16878 o Minor bugfixes (documentation):
16879 - Document the --passphrase-fd option in the tor manpage. Fixes bug
16880 19504; bugfix on 0.2.7.3-rc.
16881 - Fix the description of the --passphrase-fd option in the
16882 tor-gencert manpage. The option is used to pass the number of a
16883 file descriptor to read the passphrase from, not to read the file
16884 descriptor from. Fixes bug 19505; bugfix on 0.2.0.20-alpha.
16886 o Minor bugfixes (ephemeral hidden service):
16887 - When deleting an ephemeral hidden service, close its intro points
16888 even if they are not completely open. Fixes bug 18604; bugfix
16891 o Minor bugfixes (guard selection):
16892 - Use a single entry guard even if the NumEntryGuards consensus
16893 parameter is not provided. Fixes bug 17688; bugfix
16895 - Don't mark guards as unreachable if connection_connect() fails.
16896 That function fails for local reasons, so it shouldn't reveal
16897 anything about the status of the guard. Fixes bug 14334; bugfix
16900 o Minor bugfixes (hidden service client):
16901 - Increase the minimum number of internal circuits we preemptively
16902 build from 2 to 3, so a circuit is available when a client
16903 connects to another onion service. Fixes bug 13239; bugfix
16906 o Minor bugfixes (logging):
16907 - When logging a directory ownership mismatch, log the owning
16908 username correctly. Fixes bug 19578; bugfix on 0.2.2.29-beta.
16910 o Minor bugfixes (memory leaks):
16911 - Fix a small, uncommon memory leak that could occur when reading a
16912 truncated ed25519 key file. Fixes bug 18956; bugfix
16915 o Minor bugfixes (testing):
16916 - Allow clients to retry HSDirs much faster in test networks. Fixes
16917 bug 19702; bugfix on 0.2.7.1-alpha. Patch by teor.
16918 - Disable ASAN's detection of segmentation faults while running
16919 test_bt.sh, so that we can make sure that our own backtrace
16920 generation code works. Fixes another aspect of bug 18934; bugfix
16921 on 0.2.5.2-alpha. Patch from "cypherpunks".
16922 - Fix the test-network-all target on out-of-tree builds by using the
16923 correct path to the test driver script. Fixes bug 19421; bugfix
16926 o Minor bugfixes (time):
16927 - Improve overflow checks in tv_udiff and tv_mdiff. Fixes bug 19483;
16928 bugfix on all released tor versions.
16929 - When computing the difference between two times in milliseconds,
16930 we now round to the nearest millisecond correctly. Previously, we
16931 could sometimes round in the wrong direction. Fixes bug 19428;
16932 bugfix on 0.2.2.2-alpha.
16934 o Minor bugfixes (user interface):
16935 - Display a more accurate number of suppressed messages in the log
16936 rate-limiter. Previously, there was a potential integer overflow
16937 in the counter. Now, if the number of messages hits a maximum, the
16938 rate-limiter doesn't count any further. Fixes bug 19435; bugfix
16940 - Fix a typo in the passphrase prompt for the ed25519 identity key.
16941 Fixes bug 19503; bugfix on 0.2.7.2-alpha.
16943 o Code simplification and refactoring:
16944 - Remove redundant declarations of the MIN macro. Closes
16946 - Rename tor_dup_addr() to tor_addr_to_str_dup() to avoid confusion.
16947 Closes ticket 18462; patch from "icanhasaccount".
16948 - Split the 600-line directory_handle_command_get function into
16949 separate functions for different URL types. Closes ticket 16698.
16952 - Fix spelling of "--enable-tor2web-mode" in the manpage. Closes
16953 ticket 19153. Patch from "U+039b".
16955 o Removed features:
16956 - Remove support for "GET /tor/bytes.txt" DirPort request, and
16957 "GETINFO dir-usage" controller request, which were only available
16958 via a compile-time option in Tor anyway. Feature was added in
16959 0.2.2.1-alpha. Resolves ticket 19035.
16960 - There is no longer a compile-time option to disable support for
16961 TransPort. (If you don't want TransPort; just don't use it.) Patch
16962 from "U+039b". Closes ticket 19449.
16965 - Run more workqueue tests as part of "make check". These had
16966 previously been implemented, but you needed to know special
16967 command-line options to enable them.
16968 - We now have unit tests for our code to reject zlib "compression
16969 bombs". (Fortunately, the code works fine.)
16972 Changes in version 0.2.8.6 - 2016-08-02
16974 Tor 0.2.8.6 is the first stable version of the Tor 0.2.8 series.
16976 The Tor 0.2.8 series improves client bootstrapping performance,
16977 completes the authority-side implementation of improved identity
16978 keys for relays, and includes numerous bugfixes and performance
16979 improvements throughout the program. This release continues to
16980 improve the coverage of Tor's test suite. For a full list of
16981 changes since Tor 0.2.7, see the ReleaseNotes file.
16983 Changes since 0.2.8.5-rc:
16985 o Minor features (geoip):
16986 - Update geoip and geoip6 to the July 6 2016 Maxmind GeoLite2
16989 o Minor bugfixes (compilation):
16990 - Fix a compilation warning in the unit tests on systems where char
16991 is signed. Fixes bug 19682; bugfix on 0.2.8.1-alpha.
16993 o Minor bugfixes (fallback directories):
16994 - Remove 1 fallback that was on the hardcoded list, then opted-out,
16995 leaving 89 of the 100 fallbacks originally introduced in Tor
16996 0.2.8.2-alpha in March 2016. Closes ticket 19782; patch by teor.
16998 o Minor bugfixes (Linux seccomp2 sandbox):
16999 - Allow more syscalls when running with "Sandbox 1" enabled:
17000 sysinfo, getsockopt(SO_SNDBUF), and setsockopt(SO_SNDBUFFORCE). On
17001 some systems, these are required for Tor to start. Fixes bug
17002 18397; bugfix on 0.2.5.1-alpha. Patch from Daniel Pinto.
17003 - Allow IPPROTO_UDP datagram sockets when running with "Sandbox 1",
17004 so that get_interface_address6_via_udp_socket_hack() can work.
17005 Fixes bug 19660; bugfix on 0.2.5.1-alpha.
17008 Changes in version 0.2.8.5-rc - 2016-07-07
17009 Tor 0.2.8.5-rc is the second release candidate in the Tor 0.2.8
17010 series. If we find no new bugs or regressions here, the first stable
17011 0.2.8 release will be identical to it. It has a few small bugfixes
17012 against previous versions.
17014 o Directory authority changes:
17015 - Urras is no longer a directory authority. Closes ticket 19271.
17017 o Major bugfixes (heartbeat):
17018 - Fix a regression that would crash Tor when the periodic
17019 "heartbeat" log messages were disabled. Fixes bug 19454; bugfix on
17020 0.2.8.1-alpha. Reported by "kubaku".
17022 o Minor features (build):
17023 - Tor now again builds with the recent OpenSSL 1.1 development
17024 branch (tested against 1.1.0-pre6-dev). Closes ticket 19499.
17025 - When building manual pages, set the timezone to "UTC", so that the
17026 output is reproducible. Fixes bug 19558; bugfix on 0.2.2.9-alpha.
17027 Patch from intrigeri.
17029 o Minor bugfixes (fallback directory selection):
17030 - Avoid errors during fallback selection if there are no eligible
17031 fallbacks. Fixes bug 19480; bugfix on 0.2.8.3-alpha. Patch
17034 o Minor bugfixes (IPv6, microdescriptors):
17035 - Don't check node addresses when we only have a routerstatus. This
17036 allows IPv6-only clients to bootstrap by fetching microdescriptors
17037 from fallback directory mirrors. (The microdescriptor consensus
17038 has no IPv6 addresses in it.) Fixes bug 19608; bugfix
17041 o Minor bugfixes (logging):
17042 - Reduce pointlessly verbose log messages when directory servers
17043 can't be found. Fixes bug 18849; bugfix on 0.2.8.3-alpha and
17044 0.2.8.1-alpha. Patch by teor.
17045 - When a fallback directory changes its fingerprint from the hard-
17046 coded fingerprint, log a less severe, more explanatory log
17047 message. Fixes bug 18812; bugfix on 0.2.8.1-alpha. Patch by teor.
17049 o Minor bugfixes (Linux seccomp2 sandboxing):
17050 - Allow statistics to be written to disk when "Sandbox 1" is
17051 enabled. Fixes bugs 19556 and 19957; bugfix on 0.2.5.1-alpha and
17052 0.2.6.1-alpha respectively.
17054 o Minor bugfixes (user interface):
17055 - Remove a warning message "Service [scrubbed] not found after
17056 descriptor upload". This message appears when one uses HSPOST
17057 control command to upload a service descriptor. Since there is
17058 only a descriptor and no service, showing this message is
17059 pointless and confusing. Fixes bug 19464; bugfix on 0.2.7.2-alpha.
17061 o Fallback directory list:
17062 - Add a comment to the generated fallback directory list that
17063 explains how to comment out unsuitable fallbacks in a way that's
17064 compatible with the stem fallback parser.
17065 - Update fallback whitelist and blacklist based on relay operator
17066 emails. Blacklist unsuitable (non-working, over-volatile)
17067 fallbacks. Resolves ticket 19071. Patch by teor.
17068 - Remove 10 unsuitable fallbacks, leaving 90 of the 100 fallbacks
17069 originally introduced in Tor 0.2.8.2-alpha in March 2016. Closes
17070 ticket 19071; patch by teor.
17073 Changes in version 0.2.8.4-rc - 2016-06-15
17074 Tor 0.2.8.4-rc is the first release candidate in the Tor 0.2.8 series.
17075 If we find no new bugs or regressions here, the first stable 0.2.8
17076 release will be identical to it. It has a few small bugfixes against
17079 o Major bugfixes (user interface):
17080 - Correctly give a warning in the cases where a relay is specified
17081 by nickname, and one such relay is found, but it is not officially
17082 Named. Fixes bug 19203; bugfix on 0.2.3.1-alpha.
17084 o Minor features (build):
17085 - Tor now builds once again with the recent OpenSSL 1.1 development
17086 branch (tested against 1.1.0-pre5 and 1.1.0-pre6-dev).
17088 o Minor features (geoip):
17089 - Update geoip and geoip6 to the June 7 2016 Maxmind GeoLite2
17092 o Minor bugfixes (compilation):
17093 - Cause the unit tests to compile correctly on mingw64 versions that
17094 lack sscanf. Fixes bug 19213; bugfix on 0.2.7.1-alpha.
17096 o Minor bugfixes (downloading):
17097 - Predict more correctly whether we'll be downloading over HTTP when
17098 we determine the maximum length of a URL. This should avoid a
17099 "BUG" warning about the Squid HTTP proxy and its URL limits. Fixes
17103 Changes in version 0.2.8.3-alpha - 2016-05-26
17104 Tor 0.2.8.3-alpha resolves several bugs, most of them introduced over
17105 the course of the 0.2.8 development cycle. It improves the behavior of
17106 directory clients, fixes several crash bugs, fixes a gap in compiler
17107 hardening, and allows the full integration test suite to run on
17110 o Major bugfixes (security, client, DNS proxy):
17111 - Stop a crash that could occur when a client running with DNSPort
17112 received a query with multiple address types, and the first
17113 address type was not supported. Found and fixed by Scott Dial.
17114 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
17116 o Major bugfixes (security, compilation):
17117 - Correctly detect compiler flags on systems where _FORTIFY_SOURCE
17118 is predefined. Previously, our use of -D_FORTIFY_SOURCE would
17119 cause a compiler warning, thereby making other checks fail, and
17120 needlessly disabling compiler-hardening support. Fixes one case of
17121 bug 18841; bugfix on 0.2.3.17-beta. Patch from "trudokal".
17123 o Major bugfixes (security, directory authorities):
17124 - Fix a crash and out-of-bounds write during authority voting, when
17125 the list of relays includes duplicate ed25519 identity keys. Fixes
17126 bug 19032; bugfix on 0.2.8.2-alpha.
17128 o Major bugfixes (client, bootstrapping):
17129 - Check if bootstrap consensus downloads are still needed when the
17130 linked connection attaches. This prevents tor making unnecessary
17131 begindir-style connections, which are the only directory
17132 connections tor clients make since the fix for 18483 was merged.
17133 - Fix some edge cases where consensus download connections may not
17134 have been closed, even though they were not needed. Related to fix
17136 - Make relays retry consensus downloads the correct number of times,
17137 rather than the more aggressive client retry count. Fixes part of
17139 - Stop downloading consensuses when we have a consensus, even if we
17140 don't have all the certificates for it yet. Fixes bug 18809;
17141 bugfix on 0.2.8.1-alpha. Patches by arma and teor.
17143 o Major bugfixes (directory mirrors):
17144 - Decide whether to advertise begindir support in the the same way
17145 we decide whether to advertise our DirPort. Allowing these
17146 decisions to become out-of-sync led to surprising behavior like
17147 advertising begindir support when hibernation made us not
17148 advertise a DirPort. Resolves bug 18616; bugfix on 0.2.8.1-alpha.
17151 o Major bugfixes (IPv6 bridges, client):
17152 - Actually use IPv6 addresses when selecting directory addresses for
17153 IPv6 bridges. Fixes bug 18921; bugfix on 0.2.8.1-alpha. Patch
17156 o Major bugfixes (key management):
17157 - If OpenSSL fails to generate an RSA key, do not retain a dangling
17158 pointer to the previous (uninitialized) key value. The impact here
17159 should be limited to a difficult-to-trigger crash, if OpenSSL is
17160 running an engine that makes key generation failures possible, or
17161 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
17162 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
17165 o Major bugfixes (testing):
17166 - Fix a bug that would block 'make test-network-all' on systems where
17167 IPv6 packets were lost. Fixes bug 19008; bugfix on 0.2.7.3-rc.
17168 - Avoid "WSANOTINITIALISED" warnings in the unit tests. Fixes bug 18668;
17169 bugfix on 0.2.8.1-alpha.
17171 o Minor features (clients):
17172 - Make clients, onion services, and bridge relays always use an
17173 encrypted begindir connection for directory requests. Resolves
17174 ticket 18483. Patch by "teor".
17176 o Minor features (fallback directory mirrors):
17177 - Give each fallback the same weight for client selection; restrict
17178 fallbacks to one per operator; report fallback directory detail
17179 changes when rebuilding list; add new fallback directory mirrors
17180 to the whitelist; and many other minor simplifications and fixes.
17181 Closes tasks 17905, 18749, bug 18689, and fixes part of bug 18812 on
17182 0.2.8.1-alpha; patch by "teor".
17183 - Replace the 21 fallbacks generated in January 2016 and included in
17184 Tor 0.2.8.1-alpha, with a list of 100 fallbacks generated in March
17185 2016. Closes task 17158; patch by "teor".
17187 o Minor features (geoip):
17188 - Update geoip and geoip6 to the May 4 2016 Maxmind GeoLite2
17191 o Minor bugfixes (assert, portability):
17192 - Fix an assertion failure in memarea.c on systems where "long" is
17193 shorter than the size of a pointer. Fixes bug 18716; bugfix
17196 o Minor bugfixes (bootstrap):
17197 - Consistently use the consensus download schedule for authority
17198 certificates. Fixes bug 18816; bugfix on 0.2.4.13-alpha.
17200 o Minor bugfixes (build):
17201 - Remove a pair of redundant AM_CONDITIONAL declarations from
17202 configure.ac. Fixes one final case of bug 17744; bugfix
17204 - Resolve warnings when building on systems that are concerned with
17205 signed char. Fixes bug 18728; bugfix on 0.2.7.2-alpha
17207 - When libscrypt.h is found, but no libscrypt library can be linked,
17208 treat libscrypt as absent. Fixes bug 19161; bugfix
17211 o Minor bugfixes (client):
17212 - Turn all TestingClientBootstrap* into non-testing torrc options.
17213 This changes simply renames them by removing "Testing" in front of
17214 them and they do not require TestingTorNetwork to be enabled
17215 anymore. Fixes bug 18481; bugfix on 0.2.8.1-alpha.
17216 - Make directory node selection more reliable, mainly for IPv6-only
17217 clients and clients with few reachable addresses. Fixes bug 18929;
17218 bugfix on 0.2.8.1-alpha. Patch by "teor".
17220 o Minor bugfixes (controller, microdescriptors):
17221 - Make GETINFO dir/status-vote/current/consensus conform to the
17222 control specification by returning "551 Could not open cached
17223 consensus..." when not caching consensuses. Fixes bug 18920;
17224 bugfix on 0.2.2.6-alpha.
17226 o Minor bugfixes (crypto, portability):
17227 - The SHA3 and SHAKE routines now produce the correct output on Big
17228 Endian systems. No code calls either algorithm yet, so this is
17229 primarily a build fix. Fixes bug 18943; bugfix on 0.2.8.1-alpha.
17230 - Tor now builds again with the recent OpenSSL 1.1 development
17231 branch (tested against 1.1.0-pre4 and 1.1.0-pre5-dev). Closes
17234 o Minor bugfixes (directories):
17235 - When fetching extrainfo documents, compare their SHA256 digests
17236 and Ed25519 signing key certificates with the routerinfo that led
17237 us to fetch them, rather than with the most recent routerinfo.
17238 Otherwise we generate many spurious warnings about mismatches.
17239 Fixes bug 17150; bugfix on 0.2.7.2-alpha.
17241 o Minor bugfixes (logging):
17242 - When we can't generate a signing key because OfflineMasterKey is
17243 set, do not imply that we should have been able to load it. Fixes
17244 bug 18133; bugfix on 0.2.7.2-alpha.
17245 - Stop periodic_event_dispatch() from blasting twelve lines per
17246 second at loglevel debug. Fixes bug 18729; fix on 0.2.8.1-alpha.
17247 - When rejecting a misformed INTRODUCE2 cell, only log at
17248 PROTOCOL_WARN severity. Fixes bug 18761; bugfix on 0.2.8.2-alpha.
17250 o Minor bugfixes (pluggable transports):
17251 - Avoid reporting a spurious error when we decide that we don't need
17252 to terminate a pluggable transport because it has already exited.
17253 Fixes bug 18686; bugfix on 0.2.5.5-alpha.
17255 o Minor bugfixes (pointer arithmetic):
17256 - Fix a bug in memarea_alloc() that could have resulted in remote
17257 heap write access, if Tor had ever passed an unchecked size to
17258 memarea_alloc(). Fortunately, all the sizes we pass to
17259 memarea_alloc() are pre-checked to be less than 128 kilobytes.
17260 Fixes bug 19150; bugfix on 0.2.1.1-alpha. Bug found by
17263 o Minor bugfixes (relays):
17264 - Consider more config options when relays decide whether to
17265 regenerate their descriptor. Fixes more of bug 12538; bugfix
17267 - Resolve some edge cases where we might launch an ORPort
17268 reachability check even when DisableNetwork is set. Noticed while
17269 fixing bug 18616; bugfix on 0.2.3.9-alpha.
17271 o Minor bugfixes (statistics):
17272 - We now include consensus downloads via IPv6 in our directory-
17273 request statistics. Fixes bug 18460; bugfix on 0.2.3.14-alpha.
17275 o Minor bugfixes (testing):
17276 - Allow directories in small networks to bootstrap by skipping
17277 DirPort checks when the consensus has no exits. Fixes bug 19003;
17278 bugfix on 0.2.8.1-alpha. Patch by teor.
17279 - Fix a small memory leak that would occur when the
17280 TestingEnableCellStatsEvent option was turned on. Fixes bug 18673;
17281 bugfix on 0.2.5.2-alpha.
17283 o Minor bugfixes (time handling):
17284 - When correcting a corrupt 'struct tm' value, fill in the tm_wday
17285 field. Otherwise, our unit tests crash on Windows. Fixes bug
17286 18977; bugfix on 0.2.2.25-alpha.
17289 - Document the contents of the 'datadir/keys' subdirectory in the
17290 manual page. Closes ticket 17621.
17291 - Stop recommending use of nicknames to identify relays in our
17292 MapAddress documentation. Closes ticket 18312.
17295 Changes in version 0.2.8.2-alpha - 2016-03-28
17296 Tor 0.2.8.2-alpha is the second alpha in its series. It fixes numerous
17297 bugs in earlier versions of Tor, including some that prevented
17298 authorities using Tor 0.2.7.x from running correctly. IPv6 and
17299 directory support should also be much improved.
17301 o New system requirements:
17302 - Tor no longer supports versions of OpenSSL with a broken
17303 implementation of counter mode. (This bug was present in OpenSSL
17304 1.0.0, and was fixed in OpenSSL 1.0.0a.) Tor still detects, but no
17305 longer runs with, these versions.
17306 - Tor no longer attempts to support platforms where the "time_t"
17307 type is unsigned. (To the best of our knowledge, only OpenVMS does
17308 this, and Tor has never actually built on OpenVMS.) Closes
17310 - Tor now uses Autoconf version 2.63 or later, and Automake 1.11 or
17311 later (released in 2008 and 2009 respectively). If you are
17312 building Tor from the git repository instead of from the source
17313 distribution, and your tools are older than this, you will need to
17314 upgrade. Closes ticket 17732.
17316 o Major bugfixes (security, pointers):
17317 - Avoid a difficult-to-trigger heap corruption attack when extending
17318 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
17319 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
17320 Reported by Guido Vranken.
17322 o Major bugfixes (bridges, pluggable transports):
17323 - Modify the check for OR connections to private addresses. Allow
17324 bridges on private addresses, including pluggable transports that
17325 ignore the (potentially private) address in the bridge line. Fixes
17326 bug 18517; bugfix on 0.2.8.1-alpha. Reported by gk, patch by teor.
17328 o Major bugfixes (compilation):
17329 - Repair hardened builds under the clang compiler. Previously, our
17330 use of _FORTIFY_SOURCE would conflict with clang's address
17331 sanitizer. Fixes bug 14821; bugfix on 0.2.5.4-alpha.
17333 o Major bugfixes (crash on shutdown):
17334 - Correctly handle detaching circuits from muxes when shutting down.
17335 Fixes bug 18116; bugfix on 0.2.8.1-alpha.
17336 - Fix an assert-on-exit bug related to counting memory usage in
17337 rephist.c. Fixes bug 18651; bugfix on 0.2.8.1-alpha.
17339 o Major bugfixes (crash on startup):
17340 - Fix a segfault during startup: If a Unix domain socket was
17341 configured as listener (such as a ControlSocket or a SocksPort
17342 "unix:" socket), and tor was started as root but not configured to
17343 switch to another user, tor would segfault while trying to string
17344 compare a NULL value. Fixes bug 18261; bugfix on 0.2.8.1-alpha.
17347 o Major bugfixes (dns proxy mode, crash):
17348 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
17349 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
17351 o Major bugfixes (relays, bridge clients):
17352 - Ensure relays always allow IPv4 OR and Dir connections. Ensure
17353 bridge clients use the address configured in the bridge line.
17354 Fixes bug 18348; bugfix on 0.2.8.1-alpha. Reported by sysrqb,
17357 o Major bugfixes (voting):
17358 - Actually enable support for authorities to match routers by their
17359 Ed25519 identities. Previously, the code had been written, but
17360 some debugging code that had accidentally been left in the
17361 codebase made it stay turned off. Fixes bug 17702; bugfix
17363 - When collating votes by Ed25519 identities, authorities now
17364 include a "NoEdConsensus" flag if the ed25519 value (or lack
17365 thereof) for a server does not reflect the majority consensus.
17366 Related to bug 17668; bugfix on 0.2.7.2-alpha.
17367 - When generating a vote with keypinning disabled, never include two
17368 entries for the same ed25519 identity. This bug was causing
17369 authorities to generate votes that they could not parse when a
17370 router violated key pinning by changing its RSA identity but
17371 keeping its Ed25519 identity. Fixes bug 17668; fixes part of bug
17372 18318. Bugfix on 0.2.7.2-alpha.
17374 o Minor features (security, win32):
17375 - Set SO_EXCLUSIVEADDRUSE on Win32 to avoid a local port-stealing
17376 attack. Fixes bug 18123; bugfix on all tor versions. Patch
17379 o Minor features (bug-resistance):
17380 - Make Tor survive errors involving connections without a
17381 corresponding event object. Previously we'd fail with an
17382 assertion; now we produce a log message. Related to bug 16248.
17384 o Minor features (build):
17385 - Detect systems with FreeBSD-derived kernels (such as GNU/kFreeBSD)
17386 as having possible IPFW support. Closes ticket 18448. Patch from
17387 Steven Chamberlain.
17389 o Minor features (code hardening):
17390 - Use tor_snprintf() and tor_vsnprintf() even in external and low-
17391 level code, to harden against accidental failures to NUL-
17392 terminate. Part of ticket 17852. Patch from jsturgix. Found
17395 o Minor features (crypto):
17396 - Validate the hard-coded Diffie-Hellman parameters and ensure that
17397 p is a safe prime, and g is a suitable generator. Closes
17400 o Minor features (geoip):
17401 - Update geoip and geoip6 to the March 3 2016 Maxmind GeoLite2
17404 o Minor features (hidden service directory):
17405 - Streamline relay-side hsdir handling: when relays consider whether
17406 to accept an uploaded hidden service descriptor, they no longer
17407 check whether they are one of the relays in the network that is
17408 "supposed" to handle that descriptor. Implements ticket 18332.
17410 o Minor features (IPv6):
17411 - Add ClientPreferIPv6DirPort, which is set to 0 by default. If set
17412 to 1, tor prefers IPv6 directory addresses.
17413 - Add ClientUseIPv4, which is set to 1 by default. If set to 0, tor
17414 avoids using IPv4 for client OR and directory connections.
17415 - Try harder to obey the IP version restrictions "ClientUseIPv4 0",
17416 "ClientUseIPv6 0", "ClientPreferIPv6ORPort", and
17417 "ClientPreferIPv6DirPort". Closes ticket 17840; patch by teor.
17419 o Minor features (linux seccomp2 sandbox):
17420 - Reject attempts to change our Address with "Sandbox 1" enabled.
17421 Changing Address with Sandbox turned on would never actually work,
17422 but previously it would fail in strange and confusing ways. Found
17423 while fixing 18548.
17425 o Minor features (robustness):
17426 - Exit immediately with an error message if the code attempts to use
17427 Libevent without having initialized it. This should resolve some
17428 frequently-made mistakes in our unit tests. Closes ticket 18241.
17430 o Minor features (unix domain sockets):
17431 - Add a new per-socket option, RelaxDirModeCheck, to allow creating
17432 Unix domain sockets without checking the permissions on the parent
17433 directory. (Tor checks permissions by default because some
17434 operating systems only check permissions on the parent directory.
17435 However, some operating systems do look at permissions on the
17436 socket, and tor's default check is unneeded.) Closes ticket 18458.
17439 o Minor bugfixes (exit policies, security):
17440 - Refresh an exit relay's exit policy when interface addresses
17441 change. Previously, tor only refreshed the exit policy when the
17442 configured external address changed. Fixes bug 18208; bugfix on
17443 0.2.7.3-rc. Patch by teor.
17445 o Minor bugfixes (security, hidden services):
17446 - Prevent hidden services connecting to client-supplied rendezvous
17447 addresses that are reserved as internal or multicast. Fixes bug
17448 8976; bugfix on 0.2.3.21-rc. Patch by dgoulet and teor.
17450 o Minor bugfixes (build):
17451 - Do not link the unit tests against both the testing and non-
17452 testing versions of the static libraries. Fixes bug 18490; bugfix
17454 - Avoid spurious failures from configure files related to calling
17455 exit(0) in TOR_SEARCH_LIBRARY. Fixes bug 18626; bugfix on
17456 0.2.0.1-alpha. Patch from "cypherpunks".
17457 - Silence spurious clang-scan warnings in the ed25519_donna code by
17458 explicitly initializing some objects. Fixes bug 18384; bugfix on
17459 0.2.7.2-alpha. Patch by teor.
17461 o Minor bugfixes (client, bootstrap):
17462 - Count receipt of new microdescriptors as progress towards
17463 bootstrapping. Previously, with EntryNodes set, Tor might not
17464 successfully repopulate the guard set on bootstrapping. Fixes bug
17465 16825; bugfix on 0.2.3.1-alpha.
17467 o Minor bugfixes (code correctness):
17468 - Update to the latest version of Trunnel, which tries harder to
17469 avoid generating code that can invoke memcpy(p,NULL,0). Bug found
17470 by clang address sanitizer. Fixes bug 18373; bugfix
17473 o Minor bugfixes (configuration):
17474 - Fix a tiny memory leak when parsing a port configuration ending in
17475 ":auto". Fixes bug 18374; bugfix on 0.2.3.3-alpha.
17477 o Minor bugfixes (containers):
17478 - If we somehow attempt to construct a heap with more than
17479 1073741822 elements, avoid an integer overflow when maintaining
17480 the heap property. Fixes bug 18296; bugfix on 0.1.2.1-alpha.
17482 o Minor bugfixes (correctness):
17483 - Fix a bad memory handling bug that would occur if we had queued a
17484 cell on a channel's incoming queue. Fortunately, we can't actually
17485 queue a cell like that as our code is constructed today, but it's
17486 best to avoid this kind of error, even if there isn't any code
17487 that triggers it today. Fixes bug 18570; bugfix on 0.2.4.4-alpha.
17489 o Minor bugfixes (directory):
17490 - When generating a URL for a directory server on an IPv6 address,
17491 wrap the IPv6 address in square brackets. Fixes bug 18051; bugfix
17492 on 0.2.3.9-alpha. Patch from Malek.
17494 o Minor bugfixes (fallback directory mirrors):
17495 - When requesting extrainfo descriptors from a trusted directory
17496 server, check whether it is an authority or a fallback directory
17497 which supports extrainfo descriptors. Fixes bug 18489; bugfix on
17498 0.2.4.7-alpha. Reported by atagar, patch by teor.
17500 o Minor bugfixes (hidden service, client):
17501 - Handle the case where the user makes several fast consecutive
17502 requests to the same .onion address. Previously, the first six
17503 requests would each trigger a descriptor fetch, each picking a
17504 directory (there are 6 overall) and the seventh one would fail
17505 because no directories were left, thereby triggering a close on
17506 all current directory connections asking for the hidden service.
17507 The solution here is to not close the connections if we have
17508 pending directory fetches. Fixes bug 15937; bugfix
17511 o Minor bugfixes (hidden service, control port):
17512 - Add the onion address to the HS_DESC event for the UPLOADED action
17513 both on success or failure. It was previously hardcoded with
17514 UNKNOWN. Fixes bug 16023; bugfix on 0.2.7.2-alpha.
17516 o Minor bugfixes (hidden service, directory):
17517 - Bridges now refuse "rendezvous2" (hidden service descriptor)
17518 publish attempts. Suggested by ticket 18332.
17520 o Minor bugfixes (linux seccomp2 sandbox):
17521 - Allow the setrlimit syscall, and the prlimit and prlimit64
17522 syscalls, which some libc implementations use under the hood.
17523 Fixes bug 15221; bugfix on 0.2.5.1-alpha.
17524 - Avoid a 10-second delay when starting as a client with "Sandbox 1"
17525 enabled and no DNS resolvers configured. This should help TAILS
17526 start up faster. Fixes bug 18548; bugfix on 0.2.5.1-alpha.
17527 - Fix the sandbox's interoperability with unix domain sockets under
17528 setuid. Fixes bug 18253; bugfix on 0.2.8.1-alpha.
17530 o Minor bugfixes (logging):
17531 - When logging information about an unparsable networkstatus vote or
17532 consensus, do not say "vote" when we mean consensus. Fixes bug
17533 18368; bugfix on 0.2.0.8-alpha.
17534 - Scrub service name in "unrecognized service ID" log messages.
17535 Fixes bug 18600; bugfix on 0.2.4.11-alpha.
17536 - Downgrade logs and backtraces about IP versions to info-level.
17537 Only log backtraces once each time tor runs. Assists in diagnosing
17538 bug 18351; bugfix on 0.2.8.1-alpha. Reported by sysrqb and
17539 Christian, patch by teor.
17541 o Minor bugfixes (memory safety):
17542 - Avoid freeing an uninitialized pointer when opening a socket fails
17543 in get_interface_addresses_ioctl(). Fixes bug 18454; bugfix on
17544 0.2.3.11-alpha. Reported by toralf and "cypherpunks", patch
17546 - Correctly duplicate addresses in get_interface_address6_list().
17547 Fixes bug 18454; bugfix on 0.2.8.1-alpha. Reported by toralf,
17548 patch by "cypherpunks".
17549 - Fix a memory leak in tor-gencert. Fixes part of bug 18672; bugfix
17551 - Fix a memory leak in "tor --list-fingerprint". Fixes part of bug
17552 18672; bugfix on 0.2.5.1-alpha.
17554 o Minor bugfixes (private directory):
17555 - Prevent a race condition when creating private directories. Fixes
17556 part of bug 17852; bugfix on 0.0.2pre13. Part of ticket 17852.
17557 Patch from jsturgix. Found with Flawfinder.
17559 o Minor bugfixes (test networks, IPv6):
17560 - Allow internal IPv6 addresses in descriptors in test networks.
17561 Fixes bug 17153; bugfix on 0.2.3.16-alpha. Patch by teor, reported
17564 o Minor bugfixes (testing):
17565 - We no longer disable assertions in the unit tests when coverage is
17566 enabled. Instead, we require you to say --disable-asserts-in-tests
17567 to the configure script if you need assertions disabled in the
17568 unit tests (for example, if you want to perform branch coverage).
17569 Fixes bug 18242; bugfix on 0.2.7.1-alpha.
17571 o Minor bugfixes (time parsing):
17572 - Avoid overflow in tor_timegm when parsing dates in and after 2038
17573 on platforms with 32-bit time_t. Fixes bug 18479; bugfix on
17574 0.0.2pre14. Patch by teor.
17576 o Minor bugfixes (tor-gencert):
17577 - Correctly handle the case where an authority operator enters a
17578 passphrase but sends an EOF before sending a newline. Fixes bug
17579 17443; bugfix on 0.2.0.20-rc. Found by junglefowl.
17581 o Code simplification and refactoring:
17582 - Quote all the string interpolations in configure.ac -- even those
17583 which we are pretty sure can't contain spaces. Closes ticket
17584 17744. Patch from zerosion.
17585 - Remove specialized code for non-inplace AES_CTR. 99% of our AES is
17586 inplace, so there's no need to have a separate implementation for
17587 the non-inplace code. Closes ticket 18258. Patch from Malek.
17588 - Simplify return types for some crypto functions that can't
17589 actually fail. Patch from Hassan Alsibyani. Closes ticket 18259.
17592 - Change build messages to refer to "Fedora" instead of "Fedora
17593 Core", and "dnf" instead of "yum". Closes tickets 18459 and 18426.
17594 Patches from "icanhasaccount" and "cypherpunks".
17596 o Removed features:
17597 - We no longer maintain an internal freelist in memarea.c.
17598 Allocators should be good enough to make this code unnecessary,
17599 and it's doubtful that it ever had any performance benefit.
17602 - Fix several warnings from clang's address sanitizer produced in
17604 - Treat backtrace test failures as expected on FreeBSD until we
17605 solve bug 17808. Closes ticket 18204.
17608 Changes in version 0.2.8.1-alpha - 2016-02-04
17609 Tor 0.2.8.1-alpha is the first alpha release in its series. It
17610 includes numerous small features and bugfixes against previous Tor
17611 versions, and numerous small infrastructure improvements. The most
17612 notable features are a set of improvements to the directory subsystem.
17614 o Major features (security, Linux):
17615 - When Tor starts as root on Linux and is told to switch user ID, it
17616 can now retain the capability to bind to low ports. By default,
17617 Tor will do this only when it's switching user ID and some low
17618 ports have been configured. You can change this behavior with the
17619 new option KeepBindCapabilities. Closes ticket 8195.
17621 o Major features (directory system):
17622 - When bootstrapping multiple consensus downloads at a time, use the
17623 first one that starts downloading, and close the rest. This
17624 reduces failures when authorities or fallback directories are slow
17625 or down. Together with the code for feature 15775, this feature
17626 should reduces failures due to fallback churn. Implements ticket
17627 4483. Patch by "teor". Implements IPv4 portions of proposal 210 by
17628 "mikeperry" and "teor".
17629 - Include a trial list of 21 default fallback directories, generated
17630 in January 2016, based on an opt-in survey of suitable relays.
17631 Doing this should make clients bootstrap more quickly and reliably,
17632 and reduce the load on the directory authorities. Closes ticket
17633 15775. Patch by "teor".
17634 Candidates identified using an OnionOO script by "weasel", "teor",
17635 "gsathya", and "karsten".
17636 - Previously only relays that explicitly opened a directory port
17637 (DirPort) accepted directory requests from clients. Now all
17638 relays, with and without a DirPort, accept and serve tunneled
17639 directory requests that they receive through their ORPort. You can
17640 disable this behavior using the new DirCache option. Closes
17643 o Major key updates:
17644 - Update the V3 identity key for the dannenberg directory authority:
17645 it was changed on 18 November 2015. Closes task 17906. Patch
17648 o Minor features (security, clock):
17649 - Warn when the system clock appears to move back in time (when the
17650 state file was last written in the future). Tor doesn't know that
17651 consensuses have expired if the clock is in the past. Patch by
17652 "teor". Implements ticket 17188.
17654 o Minor features (security, exit policies):
17655 - ExitPolicyRejectPrivate now rejects more private addresses by
17656 default. Specifically, it now rejects the relay's outbound bind
17657 addresses (if configured), and the relay's configured port
17658 addresses (such as ORPort and DirPort). Fixes bug 17027; bugfix on
17659 0.2.0.11-alpha. Patch by "teor".
17661 o Minor features (security, memory erasure):
17662 - Set the unused entries in a smartlist to NULL. This helped catch
17663 a (harmless) bug, and shouldn't affect performance too much.
17664 Implements ticket 17026.
17665 - Use SecureMemoryWipe() function to securely clean memory on
17666 Windows. Previously we'd use OpenSSL's OPENSSL_cleanse() function.
17667 Implements feature 17986.
17668 - Use explicit_bzero or memset_s when present. Previously, we'd use
17669 OpenSSL's OPENSSL_cleanse() function. Closes ticket 7419; patches
17670 from <logan@hackers.mu> and <selven@hackers.mu>.
17671 - Make memwipe() do nothing when passed a NULL pointer or buffer of
17672 zero size. Check size argument to memwipe() for underflow. Fixes
17673 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
17676 o Minor features (security, RNG):
17677 - Adjust Tor's use of OpenSSL's RNG APIs so that they absolutely,
17678 positively are not allowed to fail. Previously we depended on
17679 internal details of OpenSSL's behavior. Closes ticket 17686.
17680 - Never use the system entropy output directly for anything besides
17681 seeding the PRNG. When we want to generate important keys, instead
17682 of using system entropy directly, we now hash it with the PRNG
17683 stream. This may help resist certain attacks based on broken OS
17684 entropy implementations. Closes part of ticket 17694.
17685 - Use modern system calls (like getentropy() or getrandom()) to
17686 generate strong entropy on platforms that have them. Closes
17689 o Minor features (accounting):
17690 - Added two modes to the AccountingRule option: One for limiting
17691 only the number of bytes sent ("AccountingRule out"), and one for
17692 limiting only the number of bytes received ("AccountingRule in").
17693 Closes ticket 15989; patch from "unixninja92".
17695 o Minor features (build):
17696 - Since our build process now uses "make distcheck", we no longer
17697 force "make dist" to depend on "make check". Closes ticket 17893;
17698 patch from "cypherpunks."
17699 - Tor now builds successfully with the recent OpenSSL 1.1
17700 development branch, and with the latest LibreSSL. Closes tickets
17701 17549, 17921, and 17984.
17703 o Minor features (controller):
17704 - Adds the FallbackDir entries to 'GETINFO config/defaults'. Closes
17705 tickets 16774 and 17817. Patch by George Tankersley.
17706 - New 'GETINFO hs/service/desc/id/' command to retrieve a hidden
17707 service descriptor from a service's local hidden service
17708 descriptor cache. Closes ticket 14846.
17709 - Add 'GETINFO exit-policy/reject-private/[default,relay]', so
17710 controllers can examine the the reject rules added by
17711 ExitPolicyRejectPrivate. This makes it easier for stem to display
17714 o Minor features (crypto):
17715 - Add SHA512 support to crypto.c. Closes ticket 17663; patch from
17717 - Add SHA3 and SHAKE support to crypto.c. Closes ticket 17783.
17718 - When allocating a digest state object, allocate no more space than
17719 we actually need. Previously, we would allocate as much space as
17720 the state for the largest algorithm would need. This change saves
17721 up to 672 bytes per circuit. Closes ticket 17796.
17722 - Improve performance when hashing non-multiple of 8 sized buffers,
17723 based on Andrew Moon's public domain SipHash-2-4 implementation.
17724 Fixes bug 17544; bugfix on 0.2.5.3-alpha.
17726 o Minor features (directory downloads):
17727 - Wait for busy authorities and fallback directories to become non-
17728 busy when bootstrapping. (A similar change was made in 6c443e987d
17729 for directory caches chosen from the consensus.) Closes ticket
17730 17864; patch by "teor".
17731 - Add UseDefaultFallbackDirs, which enables any hard-coded fallback
17732 directory mirrors. The default is 1; set it to 0 to disable
17733 fallbacks. Implements ticket 17576. Patch by "teor".
17735 o Minor features (geoip):
17736 - Update geoip and geoip6 to the January 5 2016 Maxmind GeoLite2
17739 o Minor features (IPv6):
17740 - Add an argument 'ipv6=address:orport' to the DirAuthority and
17741 FallbackDir torrc options, to specify an IPv6 address for an
17742 authority or fallback directory. Add hard-coded ipv6 addresses for
17743 directory authorities that have them. Closes ticket 17327; patch
17744 from Nick Mathewson and "teor".
17745 - Add address policy assume_action support for IPv6 addresses.
17746 - Limit IPv6 mask bits to 128.
17747 - Warn when comparing against an AF_UNSPEC address in a policy, it's
17748 almost always a bug. Closes ticket 17863; patch by "teor".
17749 - Allow users to configure directory authorities and fallback
17750 directory servers with IPv6 addresses and ORPorts. Resolves
17752 - routerset_parse now accepts IPv6 literal addresses. Fixes bug
17753 17060; bugfix on 0.2.1.3-alpha. Patch by "teor".
17754 - Make tor_ersatz_socketpair work on IPv6-only systems. Fixes bug
17755 17638; bugfix on 0.0.2pre8. Patch by "teor".
17757 o Minor features (logging):
17758 - When logging to syslog, allow a tag to be added to the syslog
17759 identity (the string prepended to every log message). The tag can
17760 be configured with SyslogIdentityTag and defaults to none. Setting
17761 it to "foo" will cause logs to be tagged as "Tor-foo". Closes
17764 o Minor features (portability):
17765 - Use timingsafe_memcmp() where available. Closes ticket 17944;
17766 patch from <logan@hackers.mu>.
17768 o Minor features (relay, address discovery):
17769 - Add a family argument to get_interface_addresses_raw() and
17770 subfunctions to make network interface address interogation more
17771 efficient. Now Tor can specifically ask for IPv4, IPv6 or both
17772 types of interfaces from the operating system. Resolves
17774 - When get_interface_address6_list(.,AF_UNSPEC,.) is called and
17775 fails to enumerate interface addresses using the platform-specific
17776 API, have it rely on the UDP socket fallback technique to try and
17777 find out what IP addresses (both IPv4 and IPv6) our machine has.
17778 Resolves ticket 17951.
17780 o Minor features (replay cache):
17781 - The replay cache now uses SHA256 instead of SHA1. Implements
17782 feature 8961. Patch by "teor", issue reported by "rransom".
17784 o Minor features (unix file permissions):
17785 - Defer creation of Unix sockets until after setuid. This avoids
17786 needing CAP_CHOWN and CAP_FOWNER when using systemd's
17787 CapabilityBoundingSet, or chown and fowner when using SELinux.
17788 Implements part of ticket 17562. Patch from Jamie Nguyen.
17789 - If any directory created by Tor is marked as group readable, the
17790 filesystem group is allowed to be either the default GID or the
17791 root user. Allowing root to read the DataDirectory prevents the
17792 need for CAP_READ_SEARCH when using systemd's
17793 CapabilityBoundingSet, or dac_read_search when using SELinux.
17794 Implements part of ticket 17562. Patch from Jamie Nguyen.
17795 - Introduce a new DataDirectoryGroupReadable option. If it is set to
17796 1, the DataDirectory will be made readable by the default GID.
17797 Implements part of ticket 17562. Patch from Jamie Nguyen.
17799 o Minor bugfixes (accounting):
17800 - The max bandwidth when using 'AccountRule sum' is now correctly
17801 logged. Fixes bug 18024; bugfix on 0.2.6.1-alpha. Patch
17802 from "unixninja92".
17804 o Minor bugfixes (code correctness):
17805 - When closing an entry connection, generate a warning if we should
17806 have sent an end cell for it but we haven't. Fixes bug 17876;
17807 bugfix on 0.2.3.2-alpha.
17808 - Assert that allocated memory held by the reputation code is freed
17809 according to its internal counters. Fixes bug 17753; bugfix
17811 - Assert when the TLS contexts fail to initialize. Fixes bug 17683;
17814 o Minor bugfixes (compilation):
17815 - Mark all object files that include micro-revision.i as depending
17816 on it, so as to make parallel builds more reliable. Fixes bug
17817 17826; bugfix on 0.2.5.1-alpha.
17818 - Don't try to use the pthread_condattr_setclock() function unless
17819 it actually exists. Fixes compilation on NetBSD-6.x. Fixes bug
17820 17819; bugfix on 0.2.6.3-alpha.
17821 - Fix backtrace compilation on FreeBSD. Fixes bug 17827; bugfix
17823 - Fix compilation of sandbox.c with musl-libc. Fixes bug 17347;
17824 bugfix on 0.2.5.1-alpha. Patch from 'jamestk'.
17825 - Fix search for libevent libraries on OpenBSD (and other systems
17826 that install libevent 1 and libevent 2 in parallel). Fixes bug
17827 16651; bugfix on 0.1.0.7-rc. Patch from "rubiate".
17828 - Isolate environment variables meant for tests from the rest of the
17829 build system. Fixes bug 17818; bugfix on 0.2.7.3-rc.
17830 - Replace usage of 'INLINE' with 'inline'. Fixes bug 17804; bugfix
17832 - Remove config.log only from make distclean, not from make clean.
17833 Fixes bug 17924; bugfix on 0.2.4.1-alpha.
17835 o Minor bugfixes (crypto):
17836 - Check the return value of HMAC() and assert on failure. Fixes bug
17837 17658; bugfix on 0.2.3.6-alpha. Patch by "teor".
17839 o Minor bugfixes (fallback directories):
17840 - Mark fallbacks as "too busy" when they return a 503 response,
17841 rather than just marking authorities. Fixes bug 17572; bugfix on
17842 0.2.4.7-alpha. Patch by "teor".
17844 o Minor bugfixes (IPv6):
17845 - Update the limits in max_dl_per_request for IPv6 address length.
17846 Fixes bug 17573; bugfix on 0.2.1.5-alpha.
17848 o Minor bugfixes (linux seccomp2 sandbox):
17849 - Fix a crash when using offline master ed25519 keys with the Linux
17850 seccomp2 sandbox enabled. Fixes bug 17675; bugfix on 0.2.7.3-rc.
17852 o Minor bugfixes (logging):
17853 - In log messages that include a function name, use __FUNCTION__
17854 instead of __PRETTY_FUNCTION__. In GCC, these are synonymous, but
17855 with clang __PRETTY_FUNCTION__ has extra information we don't
17856 need. Fixes bug 16563; bugfix on 0.0.2pre8. Fix by Tom van
17858 - Remove needless quotes from a log message about unparseable
17859 addresses. Fixes bug 17843; bugfix on 0.2.3.3-alpha.
17861 o Minor bugfixes (portability):
17862 - Remove an #endif from configure.ac so that we correctly detect the
17863 presence of in6_addr.s6_addr32. Fixes bug 17923; bugfix
17866 o Minor bugfixes (relays):
17867 - Check that both the ORPort and DirPort (if present) are reachable
17868 before publishing a relay descriptor. Otherwise, relays publish a
17869 descriptor with DirPort 0 when the DirPort reachability test takes
17870 longer than the ORPort reachability test. Fixes bug 18050; bugfix
17871 on 0.1.0.1-rc. Reported by "starlight", patch by "teor".
17873 o Minor bugfixes (relays, hidden services):
17874 - Refuse connection requests to private OR addresses unless
17875 ExtendAllowPrivateAddresses is set. Previously, tor would connect,
17876 then refuse to send any cells to a private address. Fixes bugs
17877 17674 and 8976; bugfix on 0.2.3.21-rc. Patch by "teor".
17879 o Minor bugfixes (safe logging):
17880 - When logging a malformed hostname received through socks4, scrub
17881 it if SafeLogging says we should. Fixes bug 17419; bugfix
17884 o Minor bugfixes (statistics code):
17885 - Consistently check for overflow in round_*_to_next_multiple_of
17886 functions, and add unit tests with additional and maximal values.
17887 Fixes part of bug 13192; bugfix on 0.2.2.1-alpha.
17888 - Handle edge cases in the laplace functions: avoid division by
17889 zero, avoid taking the log of zero, and silence clang type
17890 conversion warnings using round and trunc. Add unit tests for edge
17891 cases with maximal values. Fixes part of bug 13192; bugfix
17894 o Minor bugfixes (testing):
17895 - The test for log_heartbeat was incorrectly failing in timezones
17896 with non-integer offsets. Instead of comparing the end of the time
17897 string against a constant, compare it to the output of
17898 format_local_iso_time when given the correct input. Fixes bug
17899 18039; bugfix on 0.2.5.4-alpha.
17900 - Make unit tests pass on IPv6-only systems, and systems without
17901 localhost addresses (like some FreeBSD jails). Fixes bug 17632;
17902 bugfix on 0.2.7.3-rc. Patch by "teor".
17903 - Fix a memory leak in the ntor test. Fixes bug 17778; bugfix
17905 - Check the full results of SHA256 and SHA512 digests in the unit
17906 tests. Bugfix on 0.2.2.4-alpha. Patch by "teor".
17908 o Code simplification and refactoring:
17909 - Move logging of redundant policy entries in
17910 policies_parse_exit_policy_internal into its own function. Closes
17911 ticket 17608; patch from "juce".
17912 - Extract the more complicated parts of circuit_mark_for_close()
17913 into a new function that we run periodically before circuits are
17914 freed. This change removes more than half of the functions
17915 currently in the "blob". Closes ticket 17218.
17916 - Clean up a little duplicated code in
17917 crypto_expand_key_material_TAP(). Closes ticket 17587; patch
17919 - Decouple the list of streams waiting to be attached to circuits
17920 from the overall connection list. This change makes it possible to
17921 attach streams quickly while simplifying Tor's callgraph and
17922 avoiding O(N) scans of the entire connection list. Closes
17924 - When a direct directory request fails immediately on launch,
17925 instead of relaunching that request from inside the code that
17926 launches it, instead mark the connection for teardown. This change
17927 simplifies Tor's callback and prevents the directory-request
17928 launching code from invoking itself recursively. Closes
17930 - Remove code for configuring OpenSSL dynamic locks; OpenSSL doesn't
17931 use them. Closes ticket 17926.
17934 - Add a description of the correct use of the '--keygen' command-
17935 line option. Closes ticket 17583; based on text by 's7r'.
17936 - Document the minimum HeartbeatPeriod value. Closes ticket 15638.
17937 - Explain actual minima for BandwidthRate. Closes ticket 16382.
17938 - Fix a minor formatting typo in the manpage. Closes ticket 17791.
17939 - Mention torspec URL in the manpage and point the reader to it
17940 whenever we mention a document that belongs in torspce. Fixes
17943 o Removed features:
17944 - Remove client-side support for connecting to Tor relays running
17945 versions of Tor before 0.2.3.6-alpha. These relays didn't support
17946 the v3 TLS handshake protocol, and are no longer allowed on the
17947 Tor network. Implements the client side of ticket 11150. Based on
17948 patches by Tom van der Woerdt.
17951 - Add unit tests to check for common RNG failure modes, such as
17952 returning all zeroes, identical values, or incrementing values
17953 (OpenSSL's rand_predictable feature). Patch by "teor".
17954 - Log more information when the backtrace tests fail. Closes ticket
17955 17892. Patch from "cypherpunks."
17956 - Always test both ed25519 backends, so that we can be sure that our
17957 batch-open replacement code works. Part of ticket 16794.
17958 - Cover dns_resolve_impl() in dns.c with unit tests. Implements a
17959 portion of ticket 16831.
17960 - More unit tests for compat_libevent.c, procmon.c, tortls.c,
17961 util_format.c, directory.c, and options_validate.c. Closes tickets
17962 17075, 17082, 17084, 17003, and 17076 respectively. Patches from
17964 - Unit tests for directory_handle_command_get. Closes ticket 17004.
17965 Patch from Reinaldo de Souza Jr.
17968 Changes in version 0.2.7.6 - 2015-12-10
17969 Tor version 0.2.7.6 fixes a major bug in entry guard selection, as
17970 well as a minor bug in hidden service reliability.
17972 o Major bugfixes (guard selection):
17973 - Actually look at the Guard flag when selecting a new directory
17974 guard. When we implemented the directory guard design, we
17975 accidentally started treating all relays as if they have the Guard
17976 flag during guard selection, leading to weaker anonymity and worse
17977 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
17980 o Minor features (geoip):
17981 - Update geoip and geoip6 to the December 1 2015 Maxmind GeoLite2
17984 o Minor bugfixes (compilation):
17985 - When checking for net/pfvar.h, include netinet/in.h if possible.
17986 This fixes transparent proxy detection on OpenBSD. Fixes bug
17987 17551; bugfix on 0.1.2.1-alpha. Patch from "rubiate".
17988 - Fix a compilation warning with Clang 3.6: Do not check the
17989 presence of an address which can never be NULL. Fixes bug 17781.
17991 o Minor bugfixes (correctness):
17992 - When displaying an IPv6 exit policy, include the mask bits
17993 correctly even when the number is greater than 31. Fixes bug
17994 16056; bugfix on 0.2.4.7-alpha. Patch from "gturner".
17995 - The wrong list was used when looking up expired intro points in a
17996 rend service object, causing what we think could be reachability
17997 issues for hidden services, and triggering a BUG log. Fixes bug
17998 16702; bugfix on 0.2.7.2-alpha.
17999 - Fix undefined behavior in the tor_cert_checksig function. Fixes
18000 bug 17722; bugfix on 0.2.7.2-alpha.
18003 Changes in version 0.2.7.5 - 2015-11-20
18004 The Tor 0.2.7 release series is dedicated to the memory of Tor user
18005 and privacy advocate Caspar Bowden (1961-2015). Caspar worked
18006 tirelessly to advocate human rights regardless of national borders,
18007 and oppose the encroachments of mass surveillance. He opposed national
18008 exceptionalism, he brought clarity to legal and policy debates, he
18009 understood and predicted the impact of mass surveillance on the world,
18010 and he laid the groundwork for resisting it. While serving on the Tor
18011 Project's board of directors, he brought us his uncompromising focus
18012 on technical excellence in the service of humankind. Caspar was an
18013 inimitable force for good and a wonderful friend. He was kind,
18014 humorous, generous, gallant, and believed we should protect one
18015 another without exception. We honor him here for his ideals, his
18016 efforts, and his accomplishments. Please honor his memory with works
18017 that would make him proud.
18019 Tor 0.2.7.5 is the first stable release in the Tor 0.2.7 series.
18021 The 0.2.7 series adds a more secure identity key type for relays,
18022 improves cryptography performance, resolves several longstanding
18023 hidden-service performance issues, improves controller support for
18024 hidden services, and includes small bugfixes and performance
18025 improvements throughout the program. This release series also includes
18026 more tests than before, and significant simplifications to which parts
18027 of Tor invoke which others.
18029 (This release contains no code changes since 0.2.7.4-rc.)
18032 Changes in version 0.2.7.4-rc - 2015-10-21
18033 Tor 0.2.7.4-rc is the second release candidate in the 0.2.7 series. It
18034 fixes some important memory leaks, and a scary-looking (but mostly
18035 harmless in practice) invalid-read bug. It also has a few small
18036 bugfixes, notably fixes for compilation and portability on different
18037 platforms. If no further significant bounds are found, the next
18038 release will the the official stable release.
18040 o Major bugfixes (security, correctness):
18041 - Fix an error that could cause us to read 4 bytes before the
18042 beginning of an openssl string. This bug could be used to cause
18043 Tor to crash on systems with unusual malloc implementations, or
18044 systems with unusual hardening installed. Fixes bug 17404; bugfix
18047 o Major bugfixes (correctness):
18048 - Fix a use-after-free bug in validate_intro_point_failure(). Fixes
18049 bug 17401; bugfix on 0.2.7.3-rc.
18051 o Major bugfixes (memory leaks):
18052 - Fix a memory leak in ed25519 batch signature checking. Fixes bug
18053 17398; bugfix on 0.2.6.1-alpha.
18054 - Fix a memory leak in rend_cache_failure_entry_free(). Fixes bug
18055 17402; bugfix on 0.2.7.3-rc.
18056 - Fix a memory leak when reading an expired signing key from disk.
18057 Fixes bug 17403; bugfix on 0.2.7.2-rc.
18059 o Minor features (geoIP):
18060 - Update geoip and geoip6 to the October 9 2015 Maxmind GeoLite2
18063 o Minor bugfixes (compilation):
18064 - Repair compilation with the most recent (unreleased, alpha)
18065 vesions of OpenSSL 1.1. Fixes part of ticket 17237.
18066 - Fix an integer overflow warning in test_crypto_slow.c. Fixes bug
18067 17251; bugfix on 0.2.7.2-alpha.
18068 - Fix compilation of sandbox.c with musl-libc. Fixes bug 17347;
18069 bugfix on 0.2.5.1-alpha. Patch from 'jamestk'.
18071 o Minor bugfixes (portability):
18072 - Use libexecinfo on FreeBSD to enable backtrace support. Fixes
18073 part of bug 17151; bugfix on 0.2.5.2-alpha. Patch from
18076 o Minor bugfixes (sandbox):
18077 - Add the "hidserv-stats" filename to our sandbox filter for the
18078 HiddenServiceStatistics option to work properly. Fixes bug 17354;
18079 bugfix on 0.2.6.2-alpha. Patch from David Goulet.
18081 o Minor bugfixes (testing):
18082 - Add unit tests for get_interface_address* failure cases. Fixes bug
18083 17173; bugfix on 0.2.7.3-rc. Patch by fk/teor.
18084 - Fix breakage when running 'make check' with BSD make. Fixes bug
18085 17154; bugfix on 0.2.7.3-rc. Patch by Marcin Cieślak.
18086 - Make the get_ifaddrs_* unit tests more tolerant of different
18087 network configurations. (Don't assume every test box has an IPv4
18088 address, and don't assume every test box has a non-localhost
18089 address.) Fixes bug 17255; bugfix on 0.2.7.3-rc. Patch by "teor".
18090 - Skip backtrace tests when backtrace support is not compiled in.
18091 Fixes part of bug 17151; bugfix on 0.2.7.1-alpha. Patch from
18095 - Fix capitalization of SOCKS in sample torrc. Closes ticket 15609.
18096 - Note that HiddenServicePorts can take a unix domain socket. Closes
18100 Changes in version 0.2.7.3-rc - 2015-09-25
18101 Tor 0.2.7.3-rc is the first release candidate in the 0.2.7 series. It
18102 contains numerous usability fixes for Ed25519 keys, safeguards against
18103 several misconfiguration problems, significant simplifications to
18104 Tor's callgraph, and numerous bugfixes and small features.
18106 This is the most tested release of Tor to date. The unit tests cover
18107 39.40% of the code, and the integration tests (accessible with "make
18108 test-full-online", requiring stem and chutney and a network
18109 connection) raise the coverage to 64.49%.
18111 o Major features (security, hidden services):
18112 - Hidden services, if using the EntryNodes option, are required to
18113 use more than one EntryNode, in order to avoid a guard discovery
18114 attack. (This would only affect people who had configured hidden
18115 services and manually specified the EntryNodes option with a
18116 single entry-node. The impact was that it would be easy to
18117 remotely identify the guard node used by such a hidden service.
18118 See ticket for more information.) Fixes ticket 14917.
18120 o Major features (Ed25519 keys, keypinning):
18121 - The key-pinning option on directory authorities is now advisory-
18122 only by default. In a future version, or when the AuthDirPinKeys
18123 option is set, pins are enforced again. Disabling key-pinning
18124 seemed like a good idea so that we can survive the fallout of any
18125 usability problems associated with Ed25519 keys. Closes
18128 o Major features (Ed25519 performance):
18129 - Improve the speed of Ed25519 operations and Curve25519 keypair
18130 generation when built targeting 32 bit x86 platforms with SSE2
18131 available. Implements ticket 16535.
18132 - Improve the runtime speed of Ed25519 signature verification by
18133 using Ed25519-donna's batch verification support. Implements
18136 o Major features (performance testing):
18137 - The test-network.sh script now supports performance testing.
18138 Requires corresponding chutney performance testing changes. Patch
18139 by "teor". Closes ticket 14175.
18141 o Major features (relay, Ed25519):
18142 - Significant usability improvements for Ed25519 key management. Log
18143 messages are better, and the code can recover from far more
18144 failure conditions. Thanks to "s7r" for reporting and diagnosing
18146 - Add a new OfflineMasterKey option to tell Tor never to try loading
18147 or generating a secret Ed25519 identity key. You can use this in
18148 combination with tor --keygen to manage offline and/or encrypted
18149 Ed25519 keys. Implements ticket 16944.
18150 - Add a --newpass option to allow changing or removing the
18151 passphrase of an encrypted key with tor --keygen. Implements part
18153 - On receiving a HUP signal, check to see whether the Ed25519
18154 signing key has changed, and reload it if so. Closes ticket 16790.
18156 o Major bugfixes (relay, Ed25519):
18157 - Avoid crashing on 'tor --keygen'. Fixes bug 16679; bugfix on
18158 0.2.7.2-alpha. Reported by "s7r".
18159 - Improve handling of expired signing keys with offline master keys.
18160 Fixes bug 16685; bugfix on 0.2.7.2-alpha. Reported by "s7r".
18162 o Minor features (client-side privacy):
18163 - New KeepAliveIsolateSOCKSAuth option to indefinitely extend circuit
18164 lifespan when IsolateSOCKSAuth and streams with SOCKS
18165 authentication are attached to the circuit. This allows
18166 applications like TorBrowser to manage circuit lifetime on their
18167 own. Implements feature 15482.
18168 - When logging malformed hostnames from SOCKS5 requests, respect
18169 SafeLogging configuration. Fixes bug 16891; bugfix on 0.1.1.16-rc.
18171 o Minor features (compilation):
18172 - Give a warning as early as possible when trying to build with an
18173 unsupported OpenSSL version. Closes ticket 16901.
18174 - Fail during configure if we're trying to build against an OpenSSL
18175 built without ECC support. Fixes bug 17109, bugfix on 0.2.7.1-alpha
18176 which started requiring ECC.
18178 o Minor features (geoip):
18179 - Update geoip and geoip6 to the September 3 2015 Maxmind GeoLite2
18182 o Minor features (hidden services):
18183 - Relays need to have the Fast flag to get the HSDir flag. As this
18184 is being written, we'll go from 2745 HSDirs down to 2342, a ~14%
18185 drop. This change should make some attacks against the hidden
18186 service directory system harder. Fixes ticket 15963.
18187 - Turn on hidden service statistics collection by setting the torrc
18188 option HiddenServiceStatistics to "1" by default. (This keeps
18189 track only of the fraction of traffic used by hidden services, and
18190 the total number of hidden services in existence.) Closes
18192 - Client now uses an introduction point failure cache to know when
18193 to fetch or keep a descriptor in their cache. Previously, failures
18194 were recorded implicitly, but not explicitly remembered. Closes
18197 o Minor features (testing, authorities, documentation):
18198 - New TestingDirAuthVote{Exit,Guard,HSDir}IsStrict flags to
18199 explicitly manage consensus flags in testing networks. Patch by
18200 "robgjansen", modified by "teor". Implements part of ticket 14882.
18202 o Minor bugfixes (security, exit policies):
18203 - ExitPolicyRejectPrivate now also rejects the relay's published
18204 IPv6 address (if any), and any publicly routable IPv4 or IPv6
18205 addresses on any local interfaces. ticket 17027. Patch by "teor".
18206 Fixes bug 17027; bugfix on 0.2.0.11-alpha.
18208 o Minor bug fixes (torrc exit policies):
18209 - In torrc, "accept6 *" and "reject6 *" ExitPolicy lines now only
18210 produce IPv6 wildcard addresses. Previously they would produce
18211 both IPv4 and IPv6 wildcard addresses. Patch by "teor". Fixes part
18212 of bug 16069; bugfix on 0.2.4.7-alpha.
18213 - When parsing torrc ExitPolicies, we now warn for a number of cases
18214 where the user's intent is likely to differ from Tor's actual
18215 behavior. These include: using an IPv4 address with an accept6 or
18216 reject6 line; using "private" on an accept6 or reject6 line; and
18217 including any ExitPolicy lines after accept *:* or reject *:*.
18218 Related to ticket 16069.
18219 - When parsing torrc ExitPolicies, we now issue an info-level
18220 message when expanding an "accept/reject *" line to include both
18221 IPv4 and IPv6 wildcard addresses. Related to ticket 16069.
18222 - In each instance above, usage advice is provided to avoid the
18223 message. Resolves ticket 16069. Patch by "teor". Fixes part of bug
18224 16069; bugfix on 0.2.4.7-alpha.
18226 o Minor bugfixes (authority):
18227 - Don't assign "HSDir" to a router if it isn't Valid and Running.
18228 Fixes bug 16524; bugfix on 0.2.7.2-alpha.
18229 - Downgrade log messages about Ed25519 key issues if they are in old
18230 cached router descriptors. Fixes part of bug 16286; bugfix
18232 - When we find an Ed25519 key issue in a cached descriptor, stop
18233 saying the descriptor was just "uploaded". Fixes another part of
18234 bug 16286; bugfix on 0.2.7.2-alpha.
18236 o Minor bugfixes (control port):
18237 - Repair a warning and a spurious result when getting the maximum
18238 number of file descriptors from the controller. Fixes bug 16697;
18239 bugfix on 0.2.7.2-alpha.
18241 o Minor bugfixes (correctness):
18242 - When calling channel_free_list(), avoid calling smartlist_remove()
18243 while inside a FOREACH loop. This partially reverts commit
18244 17356fe7fd96af where the correct SMARTLIST_DEL_CURRENT was
18245 incorrectly removed. Fixes bug 16924; bugfix on 0.2.4.4-alpha.
18247 o Minor bugfixes (documentation):
18248 - Advise users on how to configure separate IPv4 and IPv6 exit
18249 policies in the manpage and sample torrcs. Related to ticket 16069.
18250 - Fix the usage message of tor-resolve(1) so that it no longer lists
18251 the removed -F option. Fixes bug 16913; bugfix on 0.2.2.28-beta.
18252 - Fix an error in the manual page and comments for
18253 TestingDirAuthVoteHSDir[IsStrict], which suggested that a HSDir
18254 required "ORPort connectivity". While this is true, it is in no
18255 way unique to the HSDir flag. Of all the flags, only HSDirs need a
18256 DirPort configured in order for the authorities to assign that
18257 particular flag. Patch by "teor". Fixed as part of 14882; bugfix
18260 o Minor bugfixes (Ed25519):
18261 - Fix a memory leak when reading router descriptors with expired
18262 Ed25519 certificates. Fixes bug 16539; bugfix on 0.2.7.2-alpha.
18264 o Minor bugfixes (linux seccomp2 sandbox):
18265 - Allow bridge authorities to run correctly under the seccomp2
18266 sandbox. Fixes bug 16964; bugfix on 0.2.5.1-alpha.
18267 - Allow routers with ed25519 keys to run correctly under the
18268 seccomp2 sandbox. Fixes bug 16965; bugfix on 0.2.7.2-alpha.
18270 o Minor bugfixes (open file limit):
18271 - Fix set_max_file_descriptors() to set by default the max open file
18272 limit to the current limit when setrlimit() fails. Fixes bug
18273 16274; bugfix on 0.2.0.10-alpha. Patch by dgoulet.
18275 o Minor bugfixes (portability):
18276 - Try harder to normalize the exit status of the Tor process to the
18277 standard-provided range. Fixes bug 16975; bugfix on every version
18279 - Check correctly for Windows socket errors in the workqueue
18280 backend. Fixes bug 16741; bugfix on 0.2.6.3-alpha.
18281 - Fix the behavior of crypto_rand_time_range() when told to consider
18282 times before 1970. (These times were possible when running in a
18283 simulated network environment where time()'s output starts at
18284 zero.) Fixes bug 16980; bugfix on 0.2.7.1-alpha.
18285 - Restore correct operation of TLS client-cipher detection on
18286 OpenSSL 1.1. Fixes bug 14047; bugfix on 0.2.7.2-alpha.
18288 o Minor bugfixes (relay):
18289 - Ensure that worker threads actually exit when a fatal error or
18290 shutdown is indicated. This fix doesn't currently affect the
18291 behavior of Tor, because Tor workers never indicates fatal error
18292 or shutdown except in the unit tests. Fixes bug 16868; bugfix
18294 - Unblock threads before releasing the work queue mutex to ensure
18295 predictable scheduling behavior. Fixes bug 16644; bugfix
18298 o Code simplification and refactoring:
18299 - Change the function that's called when we need to retry all
18300 downloads so that it only reschedules the downloads to happen
18301 immediately, rather than launching them all at once itself. This
18302 further simplifies Tor's callgraph.
18303 - Move some format-parsing functions out of crypto.c and
18304 crypto_curve25519.c into crypto_format.c and/or util_format.c.
18305 - Move the client-only parts of init_keys() into a separate
18306 function. Closes ticket 16763.
18307 - Simplify the microdesc_free() implementation so that it no longer
18308 appears (to code analysis tools) to potentially invoke a huge
18309 suite of other microdesc functions.
18310 - Simply the control graph further by deferring the inner body of
18311 directory_all_unreachable() into a callback. Closes ticket 16762.
18312 - Treat the loss of an owning controller as equivalent to a SIGTERM
18313 signal. This removes a tiny amount of duplicated code, and
18314 simplifies our callgraph. Closes ticket 16788.
18315 - When generating an event to send to the controller, we no longer
18316 put the event over the network immediately. Instead, we queue
18317 these events, and use a Libevent callback to deliver them. This
18318 change simplifies Tor's callgraph by reducing the number of
18319 functions from which all other Tor functions are reachable. Closes
18321 - Wrap Windows-only C files inside '#ifdef _WIN32' so that tools
18322 that try to scan or compile every file on Unix won't decide that
18324 - Remove the unused "nulterminate" argument from buf_pullup().
18327 - Recommend a 40 GB example AccountingMax in torrc.sample rather
18328 than a 4 GB max. Closes ticket 16742.
18329 - Include the TUNING document in our source tarball. It is referred
18330 to in the ChangeLog and an error message. Fixes bug 16929; bugfix
18334 - The internal pure-C tor-fw-helper tool is now removed from the Tor
18335 distribution, in favor of the pure-Go clone available from
18336 https://gitweb.torproject.org/tor-fw-helper.git/ . The libraries
18337 used by the C tor-fw-helper are not, in our opinion, very
18338 confidence- inspiring in their secure-programming techniques.
18339 Closes ticket 13338.
18340 - Remove the code that would try to aggressively flush controller
18341 connections while writing to them. This code was introduced in
18342 0.1.2.7-alpha, in order to keep output buffers from exceeding
18343 their limits. But there is no longer a maximum output buffer size,
18344 and flushing data in this way caused some undesirable recursions
18345 in our call graph. Closes ticket 16480.
18348 - Make "bridges+hs" the default test network. This tests almost all
18349 tor functionality during make test-network, while allowing tests
18350 to succeed on non-IPv6 systems. Requires chutney commit 396da92 in
18351 test-network-bridges-hs. Closes tickets 16945 (tor) and 16946
18352 (chutney). Patches by "teor".
18353 - Autodetect CHUTNEY_PATH if the chutney and Tor sources are side-
18354 by-side in the same parent directory. Closes ticket 16903. Patch
18356 - Use environment variables rather than autoconf substitutions to
18357 send variables from the build system to the test scripts. This
18358 change should be easier to maintain, and cause 'make distcheck' to
18359 work better than before. Fixes bug 17148.
18360 - Add a new set of callgraph analysis scripts that use clang to
18361 produce a list of which Tor functions are reachable from which
18362 other Tor functions. We're planning to use these to help simplify
18363 our code structure by identifying illogical dependencies.
18364 - Add new 'test-full' and 'test-full-online' targets to run all
18365 tests, including integration tests with stem and chutney.
18366 - Make the test-workqueue test work on Windows by initializing the
18367 network before we begin.
18368 - New make target (make test-network-all) to run multiple applicable
18369 chutney test cases. Patch from Teor; closes 16953.
18370 - Unit test dns_resolve(), dns_clip_ttl() and dns_get_expiry_ttl()
18371 functions in dns.c. Implements a portion of ticket 16831.
18372 - When building Tor with testing coverage enabled, run Chutney tests
18373 (if any) using the 'tor-cov' coverage binary.
18374 - When running test-network or test-stem, check for the absence of
18375 stem/chutney before doing any build operations.
18378 Changes in version 0.2.7.2-alpha - 2015-07-27
18379 This, the second alpha in the Tor 0.2.7 series, has a number of new
18380 features, including a way to manually pick the number of introduction
18381 points for hidden services, and the much stronger Ed25519 signing key
18382 algorithm for regular Tor relays (including support for encrypted
18383 offline identity keys in the new algorithm).
18385 Support for Ed25519 on relays is currently limited to signing router
18386 descriptors; later alphas in this series will extend Ed25519 key
18387 support to more parts of the Tor protocol.
18389 o Major features (Ed25519 identity keys, Proposal 220):
18390 - All relays now maintain a stronger identity key, using the Ed25519
18391 elliptic curve signature format. This master key is designed so
18392 that it can be kept offline. Relays also generate an online
18393 signing key, and a set of other Ed25519 keys and certificates.
18394 These are all automatically regenerated and rotated as needed.
18395 Implements part of ticket 12498.
18396 - Directory authorities now vote on Ed25519 identity keys along with
18397 RSA1024 keys. Implements part of ticket 12498.
18398 - Directory authorities track which Ed25519 identity keys have been
18399 used with which RSA1024 identity keys, and do not allow them to
18400 vary freely. Implements part of ticket 12498.
18401 - Microdescriptors now include Ed25519 identity keys. Implements
18402 part of ticket 12498.
18403 - Add support for offline encrypted Ed25519 master keys. To use this
18404 feature on your tor relay, run "tor --keygen" to make a new master
18405 key (or to make a new signing key if you already have a master
18406 key). Closes ticket 13642.
18408 o Major features (Hidden services):
18409 - Add the torrc option HiddenServiceNumIntroductionPoints, to
18410 specify a fixed number of introduction points. Its maximum value
18411 is 10 and default is 3. Using this option can increase a hidden
18412 service's reliability under load, at the cost of making it more
18413 visible that the hidden service is facing extra load. Closes
18415 - Remove the adaptive algorithm for choosing the number of
18416 introduction points, which used to change the number of
18417 introduction points (poorly) depending on the number of
18418 connections the HS sees. Closes ticket 4862.
18420 o Major features (onion key cross-certification):
18421 - Relay descriptors now include signatures of their own identity
18422 keys, made using the TAP and ntor onion keys. These signatures
18423 allow relays to prove ownership of their own onion keys. Because
18424 of this change, microdescriptors will no longer need to include
18425 RSA identity keys. Implements proposal 228; closes ticket 12499.
18427 o Major features (performance):
18428 - Improve the runtime speed of Ed25519 operations by using the
18429 public-domain Ed25519-donna by Andrew M. ("floodyberry").
18430 Implements ticket 16467.
18431 - Improve the runtime speed of the ntor handshake by using an
18432 optimized curve25519 basepoint scalarmult implementation from the
18433 public-domain Ed25519-donna by Andrew M. ("floodyberry"), based on
18434 ideas by Adam Langley. Implements ticket 9663.
18436 o Major bugfixes (client-side privacy, also in 0.2.6.9):
18437 - Properly separate out each SOCKSPort when applying stream
18438 isolation. The error occurred because each port's session group
18439 was being overwritten by a default value when the listener
18440 connection was initialized. Fixes bug 16247; bugfix on
18441 0.2.6.3-alpha. Patch by "jojelino".
18443 o Major bugfixes (hidden service clients, stability, also in 0.2.6.10):
18444 - Stop refusing to store updated hidden service descriptors on a
18445 client. This reverts commit 9407040c59218 (which indeed fixed bug
18446 14219, but introduced a major hidden service reachability
18447 regression detailed in bug 16381). This is a temporary fix since
18448 we can live with the minor issue in bug 14219 (it just results in
18449 some load on the network) but the regression of 16381 is too much
18450 of a setback. First-round fix for bug 16381; bugfix
18453 o Major bugfixes (hidden services):
18454 - When cannibalizing a circuit for an introduction point, always
18455 extend to the chosen exit node (creating a 4 hop circuit).
18456 Previously Tor would use the current circuit exit node, which
18457 changed the original choice of introduction point, and could cause
18458 the hidden service to skip excluded introduction points or
18459 reconnect to a skipped introduction point. Fixes bug 16260; bugfix
18462 o Major bugfixes (open file limit):
18463 - The open file limit wasn't checked before calling
18464 tor_accept_socket_nonblocking(), which would make Tor exceed the
18465 limit. Now, before opening a new socket, Tor validates the open
18466 file limit just before, and if the max has been reached, return an
18467 error. Fixes bug 16288; bugfix on 0.1.1.1-alpha.
18469 o Major bugfixes (stability, also in 0.2.6.10):
18470 - Stop crashing with an assertion failure when parsing certain kinds
18471 of malformed or truncated microdescriptors. Fixes bug 16400;
18472 bugfix on 0.2.6.1-alpha. Found by "torkeln"; fix based on a patch
18473 by "cypherpunks_backup".
18474 - Stop random client-side assertion failures that could occur when
18475 connecting to a busy hidden service, or connecting to a hidden
18476 service while a NEWNYM is in progress. Fixes bug 16013; bugfix
18479 o Minor features (directory authorities, security, also in 0.2.6.9):
18480 - The HSDir flag given by authorities now requires the Stable flag.
18481 For the current network, this results in going from 2887 to 2806
18482 HSDirs. Also, it makes it harder for an attacker to launch a sybil
18483 attack by raising the effort for a relay to become Stable to
18484 require at the very least 7 days, while maintaining the 96 hours
18485 uptime requirement for HSDir. Implements ticket 8243.
18487 o Minor features (client):
18488 - Relax the validation of hostnames in SOCKS5 requests, allowing the
18489 character '_' to appear, in order to cope with domains observed in
18490 the wild that are serving non-RFC compliant records. Resolves
18492 - Relax the validation done to hostnames in SOCKS5 requests, and
18493 allow a single trailing '.' to cope with clients that pass FQDNs
18494 using that syntax to explicitly indicate that the domain name is
18495 fully-qualified. Fixes bug 16674; bugfix on 0.2.6.2-alpha.
18496 - Add GroupWritable and WorldWritable options to unix-socket based
18497 SocksPort and ControlPort options. These options apply to a single
18498 socket, and override {Control,Socks}SocketsGroupWritable. Closes
18501 o Minor features (control protocol):
18502 - Support network-liveness GETINFO key and NETWORK_LIVENESS event in
18503 the control protocol. Resolves ticket 15358.
18505 o Minor features (directory authorities):
18506 - Directory authorities no longer vote against the "Fast", "Stable",
18507 and "HSDir" flags just because they were going to vote against
18508 "Running": if the consensus turns out to be that the router was
18509 running, then the authority's vote should count. Patch from Peter
18510 Retzlaff; closes issue 8712.
18512 o Minor features (geoip, also in 0.2.6.10):
18513 - Update geoip to the June 3 2015 Maxmind GeoLite2 Country database.
18514 - Update geoip6 to the June 3 2015 Maxmind GeoLite2 Country database.
18516 o Minor features (hidden services):
18517 - Add the new options "HiddenServiceMaxStreams" and
18518 "HiddenServiceMaxStreamsCloseCircuit" to allow hidden services to
18519 limit the maximum number of simultaneous streams per circuit, and
18520 optionally tear down the circuit when the limit is exceeded. Part
18523 o Minor features (portability):
18524 - Use C99 variadic macros when the compiler is not GCC. This avoids
18525 failing compilations on MSVC, and fixes a log-file-based race
18526 condition in our old workarounds. Original patch from Gisle Vanem.
18528 o Minor bugfixes (compilation, also in 0.2.6.9):
18529 - Build with --enable-systemd correctly when libsystemd is
18530 installed, but systemd is not. Fixes bug 16164; bugfix on
18531 0.2.6.3-alpha. Patch from Peter Palfrader.
18533 o Minor bugfixes (controller):
18534 - Add the descriptor ID in each HS_DESC control event. It was
18535 missing, but specified in control-spec.txt. Fixes bug 15881;
18536 bugfix on 0.2.5.2-alpha.
18538 o Minor bugfixes (crypto error-handling, also in 0.2.6.10):
18539 - Check for failures from crypto_early_init, and refuse to continue.
18540 A previous typo meant that we could keep going with an
18541 uninitialized crypto library, and would have OpenSSL initialize
18542 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
18543 when implementing ticket 4900. Patch by "teor".
18545 o Minor bugfixes (hidden services):
18546 - Fix a crash when reloading configuration while at least one
18547 configured and one ephemeral hidden service exists. Fixes bug
18548 16060; bugfix on 0.2.7.1-alpha.
18549 - Avoid crashing with a double-free bug when we create an ephemeral
18550 hidden service but adding it fails for some reason. Fixes bug
18551 16228; bugfix on 0.2.7.1-alpha.
18553 o Minor bugfixes (Linux seccomp2 sandbox):
18554 - Use the sandbox in tor_open_cloexec whether or not O_CLOEXEC is
18555 defined. Patch by "teor". Fixes bug 16515; bugfix on 0.2.3.1-alpha.
18557 o Minor bugfixes (Linux seccomp2 sandbox, also in 0.2.6.10):
18558 - Allow pipe() and pipe2() syscalls in the seccomp2 sandbox: we need
18559 these when eventfd2() support is missing. Fixes bug 16363; bugfix
18560 on 0.2.6.3-alpha. Patch from "teor".
18562 o Minor bugfixes (Linux seccomp2 sandbox, also in 0.2.6.9):
18563 - Fix sandboxing to work when running as a relay, by allowing the
18564 renaming of secret_id_key, and allowing the eventfd2 and futex
18565 syscalls. Fixes bug 16244; bugfix on 0.2.6.1-alpha. Patch by
18567 - Allow systemd connections to work with the Linux seccomp2 sandbox
18568 code. Fixes bug 16212; bugfix on 0.2.6.2-alpha. Patch by
18571 o Minor bugfixes (relay):
18572 - Fix a rarely-encountered memory leak when failing to initialize
18573 the thread pool. Fixes bug 16631; bugfix on 0.2.6.3-alpha. Patch
18574 from "cypherpunks".
18576 o Minor bugfixes (systemd):
18577 - Fix an accidental formatting error that broke the systemd
18578 configuration file. Fixes bug 16152; bugfix on 0.2.7.1-alpha.
18579 - Tor's systemd unit file no longer contains extraneous spaces.
18580 These spaces would sometimes confuse tools like deb-systemd-
18581 helper. Fixes bug 16162; bugfix on 0.2.5.5-alpha.
18583 o Minor bugfixes (tests):
18584 - Use the configured Python executable when running test-stem-full.
18585 Fixes bug 16470; bugfix on 0.2.7.1-alpha.
18587 o Minor bugfixes (tests, also in 0.2.6.9):
18588 - Fix a crash in the unit tests when built with MSVC2013. Fixes bug
18589 16030; bugfix on 0.2.6.2-alpha. Patch from "NewEraCracker".
18591 o Minor bugfixes (threads, comments):
18592 - Always initialize return value in compute_desc_id in rendcommon.c
18593 Patch by "teor". Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
18594 - Check for NULL values in getinfo_helper_onions(). Patch by "teor".
18595 Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
18596 - Remove undefined directive-in-macro in test_util_writepid clang
18597 3.7 complains that using a preprocessor directive inside a macro
18598 invocation in test_util_writepid in test_util.c is undefined.
18599 Patch by "teor". Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
18601 o Code simplification and refactoring:
18602 - Define WINVER and _WIN32_WINNT centrally, in orconfig.h, in order
18603 to ensure they remain consistent and visible everywhere.
18604 - Remove some vestigial workarounds for the MSVC6 compiler. We
18605 haven't supported that in ages.
18606 - The link authentication code has been refactored for better
18607 testability and reliability. It now uses code generated with the
18608 "trunnel" binary encoding generator, to reduce the risk of bugs
18609 due to programmer error. Done as part of ticket 12498.
18612 - Include a specific and (hopefully) accurate documentation of the
18613 torrc file's meta-format in doc/torrc_format.txt. This is mainly
18614 of interest to people writing programs to parse or generate torrc
18615 files. This document is not a commitment to long-term
18616 compatibility; some aspects of the current format are a bit
18617 ridiculous. Closes ticket 2325.
18619 o Removed features:
18620 - Tor no longer supports copies of OpenSSL that are missing support
18621 for Elliptic Curve Cryptography. (We began using ECC when
18622 available in 0.2.4.8-alpha, for more safe and efficient key
18623 negotiation.) In particular, support for at least one of P256 or
18624 P224 is now required, with manual configuration needed if only
18625 P224 is available. Resolves ticket 16140.
18626 - Tor no longer supports versions of OpenSSL before 1.0. (If you are
18627 on an operating system that has not upgraded to OpenSSL 1.0 or
18628 later, and you compile Tor from source, you will need to install a
18629 more recent OpenSSL to link Tor against.) These versions of
18630 OpenSSL are still supported by the OpenSSL, but the numerous
18631 cryptographic improvements in later OpenSSL releases makes them a
18632 clear choice. Resolves ticket 16034.
18633 - Remove the HidServDirectoryV2 option. Now all relays offer to
18634 store hidden service descriptors. Related to 16543.
18635 - Remove the VoteOnHidServDirectoriesV2 option, since all
18636 authorities have long set it to 1. Closes ticket 16543.
18639 - Document use of coverity, clang static analyzer, and clang dynamic
18640 undefined behavior and address sanitizers in doc/HACKING. Include
18641 detailed usage instructions in the blacklist. Patch by "teor".
18642 Closes ticket 15817.
18643 - The link authentication protocol code now has extensive tests.
18644 - The relay descriptor signature testing code now has
18646 - The test_workqueue program now runs faster, and is enabled by
18647 default as a part of "make check".
18648 - Now that OpenSSL has its own scrypt implementation, add an unit
18649 test that checks for interoperability between libscrypt_scrypt()
18650 and OpenSSL's EVP_PBE_scrypt() so that we could not use libscrypt
18651 and rely on EVP_PBE_scrypt() whenever possible. Resolves
18655 Changes in version 0.2.6.10 - 2015-07-12
18656 Tor version 0.2.6.10 fixes some significant stability and hidden
18657 service client bugs, bulletproofs the cryptography init process, and
18658 fixes a bug when using the sandbox code with some older versions of
18659 Linux. Everyone running an older version, especially an older version
18660 of 0.2.6, should upgrade.
18662 o Major bugfixes (hidden service clients, stability):
18663 - Stop refusing to store updated hidden service descriptors on a
18664 client. This reverts commit 9407040c59218 (which indeed fixed bug
18665 14219, but introduced a major hidden service reachability
18666 regression detailed in bug 16381). This is a temporary fix since
18667 we can live with the minor issue in bug 14219 (it just results in
18668 some load on the network) but the regression of 16381 is too much
18669 of a setback. First-round fix for bug 16381; bugfix
18672 o Major bugfixes (stability):
18673 - Stop crashing with an assertion failure when parsing certain kinds
18674 of malformed or truncated microdescriptors. Fixes bug 16400;
18675 bugfix on 0.2.6.1-alpha. Found by "torkeln"; fix based on a patch
18676 by "cypherpunks_backup".
18677 - Stop random client-side assertion failures that could occur when
18678 connecting to a busy hidden service, or connecting to a hidden
18679 service while a NEWNYM is in progress. Fixes bug 16013; bugfix
18682 o Minor features (geoip):
18683 - Update geoip to the June 3 2015 Maxmind GeoLite2 Country database.
18684 - Update geoip6 to the June 3 2015 Maxmind GeoLite2 Country database.
18686 o Minor bugfixes (crypto error-handling):
18687 - Check for failures from crypto_early_init, and refuse to continue.
18688 A previous typo meant that we could keep going with an
18689 uninitialized crypto library, and would have OpenSSL initialize
18690 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
18691 when implementing ticket 4900. Patch by "teor".
18693 o Minor bugfixes (Linux seccomp2 sandbox):
18694 - Allow pipe() and pipe2() syscalls in the seccomp2 sandbox: we need
18695 these when eventfd2() support is missing. Fixes bug 16363; bugfix
18696 on 0.2.6.3-alpha. Patch from "teor".
18699 Changes in version 0.2.6.9 - 2015-06-11
18700 Tor 0.2.6.9 fixes a regression in the circuit isolation code, increases the
18701 requirements for receiving an HSDir flag, and addresses some other small
18702 bugs in the systemd and sandbox code. Clients using circuit isolation
18703 should upgrade; all directory authorities should upgrade.
18705 o Major bugfixes (client-side privacy):
18706 - Properly separate out each SOCKSPort when applying stream
18707 isolation. The error occurred because each port's session group was
18708 being overwritten by a default value when the listener connection
18709 was initialized. Fixes bug 16247; bugfix on 0.2.6.3-alpha. Patch
18712 o Minor feature (directory authorities, security):
18713 - The HSDir flag given by authorities now requires the Stable flag.
18714 For the current network, this results in going from 2887 to 2806
18715 HSDirs. Also, it makes it harder for an attacker to launch a sybil
18716 attack by raising the effort for a relay to become Stable which
18717 takes at the very least 7 days to do so and by keeping the 96
18718 hours uptime requirement for HSDir. Implements ticket 8243.
18720 o Minor bugfixes (compilation):
18721 - Build with --enable-systemd correctly when libsystemd is
18722 installed, but systemd is not. Fixes bug 16164; bugfix on
18723 0.2.6.3-alpha. Patch from Peter Palfrader.
18725 o Minor bugfixes (Linux seccomp2 sandbox):
18726 - Fix sandboxing to work when running as a relaymby renaming of
18727 secret_id_key, and allowing the eventfd2 and futex syscalls. Fixes
18728 bug 16244; bugfix on 0.2.6.1-alpha. Patch by Peter Palfrader.
18729 - Allow systemd connections to work with the Linux seccomp2 sandbox
18730 code. Fixes bug 16212; bugfix on 0.2.6.2-alpha. Patch by
18733 o Minor bugfixes (tests):
18734 - Fix a crash in the unit tests when built with MSVC2013. Fixes bug
18735 16030; bugfix on 0.2.6.2-alpha. Patch from "NewEraCracker".
18738 Changes in version 0.2.6.8 - 2015-05-21
18739 Tor 0.2.6.8 fixes a bit of dodgy code in parsing INTRODUCE2 cells, and
18740 fixes an authority-side bug in assigning the HSDir flag. All directory
18741 authorities should upgrade.
18743 o Major bugfixes (hidden services, backport from 0.2.7.1-alpha):
18744 - Revert commit that made directory authorities assign the HSDir
18745 flag to relays without a DirPort; this was bad because such relays
18746 can't handle BEGIN_DIR cells. Fixes bug 15850; bugfix
18749 o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
18750 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
18751 a client authorized hidden service. Fixes bug 15823; bugfix
18754 o Minor features (geoip):
18755 - Update geoip to the April 8 2015 Maxmind GeoLite2 Country database.
18756 - Update geoip6 to the April 8 2015 Maxmind GeoLite2
18760 Changes in version 0.2.7.1-alpha - 2015-05-12
18761 Tor 0.2.7.1-alpha is the first alpha release in its series. It
18762 includes numerous small features and bugfixes against previous Tor
18763 versions, and numerous small infrastructure improvements. The most
18764 notable features are several new ways for controllers to interact with
18765 the hidden services subsystem.
18767 o New system requirements:
18768 - Tor no longer includes workarounds to support Libevent versions
18769 before 1.3e. Libevent 2.0 or later is recommended. Closes
18772 o Major features (controller):
18773 - Add the ADD_ONION and DEL_ONION commands that allow the creation
18774 and management of hidden services via the controller. Closes
18776 - New "GETINFO onions/current" and "GETINFO onions/detached"
18777 commands to get information about hidden services created via the
18778 controller. Part of ticket 6411.
18779 - New HSFETCH command to launch a request for a hidden service
18780 descriptor. Closes ticket 14847.
18781 - New HSPOST command to upload a hidden service descriptor. Closes
18782 ticket 3523. Patch by "DonnchaC".
18784 o Major bugfixes (hidden services):
18785 - Revert commit that made directory authorities assign the HSDir
18786 flag to relays without a DirPort; this was bad because such relays
18787 can't handle BEGIN_DIR cells. Fixes bug 15850; bugfix
18790 o Minor features (clock-jump tolerance):
18791 - Recover better when our clock jumps back many hours, like might
18792 happen for Tails or Whonix users who start with a very wrong
18793 hardware clock, use Tor to discover a more accurate time, and then
18794 fix their clock. Resolves part of ticket 8766.
18796 o Minor features (command-line interface):
18797 - Make --hash-password imply --hush to prevent unnecessary noise.
18798 Closes ticket 15542. Patch from "cypherpunks".
18799 - Print a warning whenever we find a relative file path being used
18800 as torrc option. Resolves issue 14018.
18802 o Minor features (controller):
18803 - Add DirAuthority lines for default directory authorities to the
18804 output of the "GETINFO config/defaults" command if not already
18805 present. Implements ticket 14840.
18806 - Controllers can now use "GETINFO hs/client/desc/id/..." to
18807 retrieve items from the client's hidden service descriptor cache.
18808 Closes ticket 14845.
18809 - Implement a new controller command "GETINFO status/fresh-relay-
18810 descs" to fetch a descriptor/extrainfo pair that was generated on
18811 demand just for the controller's use. Implements ticket 14784.
18813 o Minor features (DoS-resistance):
18814 - Make it harder for attackers to overload hidden services with
18815 introductions, by blocking multiple introduction requests on the
18816 same circuit. Resolves ticket 15515.
18818 o Minor features (geoip):
18819 - Update geoip to the April 8 2015 Maxmind GeoLite2 Country database.
18820 - Update geoip6 to the April 8 2015 Maxmind GeoLite2
18823 o Minor features (HS popularity countermeasure):
18824 - To avoid leaking HS popularity, don't cycle the introduction point
18825 when we've handled a fixed number of INTRODUCE2 cells but instead
18826 cycle it when a random number of introductions is reached, thus
18827 making it more difficult for an attacker to find out the amount of
18828 clients that have used the introduction point for a specific HS.
18829 Closes ticket 15745.
18831 o Minor features (logging):
18832 - Include the Tor version in all LD_BUG log messages, since people
18833 tend to cut and paste those into the bugtracker. Implements
18836 o Minor features (pluggable transports):
18837 - When launching managed pluggable transports on Linux systems,
18838 attempt to have the kernel deliver a SIGTERM on tor exit if the
18839 pluggable transport process is still running. Resolves
18841 - When launching managed pluggable transports, setup a valid open
18842 stdin in the child process that can be used to detect if tor has
18843 terminated. The "TOR_PT_EXIT_ON_STDIN_CLOSE" environment variable
18844 can be used by implementations to detect this new behavior.
18845 Resolves ticket 15435.
18847 o Minor features (testing):
18848 - Add a test to verify that the compiler does not eliminate our
18849 memwipe() implementation. Closes ticket 15377.
18850 - Add make rule `check-changes` to verify the format of changes
18851 files. Closes ticket 15180.
18852 - Add unit tests for control_event_is_interesting(). Add a compile-
18853 time check that the number of events doesn't exceed the capacity
18854 of control_event_t.event_mask. Closes ticket 15431, checks for
18855 bugs similar to 13085. Patch by "teor".
18856 - Command-line argument tests moved to Stem. Resolves ticket 14806.
18857 - Integrate the ntor, backtrace, and zero-length keys tests into the
18858 automake test suite. Closes ticket 15344.
18859 - Remove assertions during builds to determine Tor's test coverage.
18860 We don't want to trigger these even in assertions, so including
18861 them artificially makes our branch coverage look worse than it is.
18862 This patch provides the new test-stem-full and coverage-html-full
18863 configure options. Implements ticket 15400.
18865 o Minor bugfixes (build):
18866 - Improve out-of-tree builds by making non-standard rules work and
18867 clean up additional files and directories. Fixes bug 15053; bugfix
18870 o Minor bugfixes (command-line interface):
18871 - When "--quiet" is provided along with "--validate-config", do not
18872 write anything to stdout on success. Fixes bug 14994; bugfix
18874 - When complaining about bad arguments to "--dump-config", use
18875 stderr, not stdout.
18877 o Minor bugfixes (configuration, unit tests):
18878 - Only add the default fallback directories when the DirAuthorities,
18879 AlternateDirAuthority, and FallbackDir directory config options
18880 are set to their defaults. The default fallback directory list is
18881 currently empty, this fix will only change tor's behavior when it
18882 has default fallback directories. Includes unit tests for
18883 consider_adding_dir_servers(). Fixes bug 15642; bugfix on
18884 90f6071d8dc0 in 0.2.4.7-alpha. Patch by "teor".
18886 o Minor bugfixes (correctness):
18887 - For correctness, avoid modifying a constant string in
18888 handle_control_postdescriptor. Fixes bug 15546; bugfix
18890 - Remove side-effects from tor_assert() calls. This was harmless,
18891 because we never disable assertions, but it is bad style and
18892 unnecessary. Fixes bug 15211; bugfix on 0.2.5.5, 0.2.2.36,
18895 o Minor bugfixes (hidden service):
18896 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
18897 a client authorized hidden service. Fixes bug 15823; bugfix
18899 - Remove an extraneous newline character from the end of hidden
18900 service descriptors. Fixes bug 15296; bugfix on 0.2.0.10-alpha.
18902 o Minor bugfixes (interface):
18903 - Print usage information for --dump-config when it is used without
18904 an argument. Also, fix the error message to use different wording
18905 and add newline at the end. Fixes bug 15541; bugfix
18908 o Minor bugfixes (logs):
18909 - When building Tor under Clang, do not include an extra set of
18910 parentheses in log messages that include function names. Fixes bug
18911 15269; bugfix on every released version of Tor when compiled with
18912 recent enough Clang.
18914 o Minor bugfixes (network):
18915 - When attempting to use fallback technique for network interface
18916 lookup, disregard loopback and multicast addresses since they are
18917 unsuitable for public communications.
18919 o Minor bugfixes (statistics):
18920 - Disregard the ConnDirectionStatistics torrc options when Tor is
18921 not a relay since in that mode of operation no sensible data is
18922 being collected and because Tor might run into measurement hiccups
18923 when running as a client for some time, then becoming a relay.
18924 Fixes bug 15604; bugfix on 0.2.2.35.
18926 o Minor bugfixes (test networks):
18927 - When self-testing reachability, use ExtendAllowPrivateAddresses to
18928 determine if local/private addresses imply reachability. The
18929 previous fix used TestingTorNetwork, which implies
18930 ExtendAllowPrivateAddresses, but this excluded rare configurations
18931 where ExtendAllowPrivateAddresses is set but TestingTorNetwork is
18932 not. Fixes bug 15771; bugfix on 0.2.6.1-alpha. Patch by "teor",
18933 issue discovered by CJ Ess.
18935 o Minor bugfixes (testing):
18936 - Check for matching value in server response in ntor_ref.py. Fixes
18937 bug 15591; bugfix on 0.2.4.8-alpha. Reported and fixed
18939 - Set the severity correctly when testing
18940 get_interface_addresses_ifaddrs() and
18941 get_interface_addresses_win32(), so that the tests fail gracefully
18942 instead of triggering an assertion. Fixes bug 15759; bugfix on
18943 0.2.6.3-alpha. Reported by Nicolas Derive.
18945 o Code simplification and refactoring:
18946 - Move the hacky fallback code out of get_interface_address6() into
18947 separate function and get it covered with unit-tests. Resolves
18949 - Refactor hidden service client-side cache lookup to intelligently
18950 report its various failure cases, and disentangle failure cases
18951 involving a lack of introduction points. Closes ticket 14391.
18952 - Use our own Base64 encoder instead of OpenSSL's, to allow more
18953 control over the output. Part of ticket 15652.
18956 - Improve the descriptions of statistics-related torrc options in
18957 the manpage to describe rationale and possible uses cases. Fixes
18959 - Improve the layout and formatting of ./configure --help messages.
18960 Closes ticket 15024. Patch from "cypherpunks".
18961 - Standardize on the term "server descriptor" in the manual page.
18962 Previously, we had used "router descriptor", "server descriptor",
18963 and "relay descriptor" interchangeably. Part of ticket 14987.
18966 - Remove `USE_OPENSSL_BASE64` and the corresponding fallback code
18967 and always use the internal Base64 decoder. The internal decoder
18968 has been part of tor since 0.2.0.10-alpha, and no one should
18969 be using the OpenSSL one. Part of ticket 15652.
18970 - Remove the 'tor_strclear()' function; use memwipe() instead.
18971 Closes ticket 14922.
18973 o Removed features:
18974 - Remove the (seldom-used) DynamicDHGroups feature. For anti-
18975 fingerprinting we now recommend pluggable transports; for forward-
18976 secrecy in TLS, we now use the P-256 group. Closes ticket 13736.
18977 - Remove the undocumented "--digests" command-line option. It
18978 complicated our build process, caused subtle build issues on
18979 multiple platforms, and is now redundant since we started
18980 including git version identifiers. Closes ticket 14742.
18981 - Tor no longer contains checks for ancient directory cache versions
18982 that didn't know about microdescriptors.
18983 - Tor no longer contains workarounds for stat files generated by
18984 super-old versions of Tor that didn't choose guards sensibly.
18987 Changes in version 0.2.4.27 - 2015-04-06
18988 Tor 0.2.4.27 backports two fixes from 0.2.6.7 for security issues that
18989 could be used by an attacker to crash hidden services, or crash clients
18990 visiting hidden services. Hidden services should upgrade as soon as
18991 possible; clients should upgrade whenever packages become available.
18993 This release also backports a simple improvement to make hidden
18994 services a bit less vulnerable to denial-of-service attacks.
18996 o Major bugfixes (security, hidden service):
18997 - Fix an issue that would allow a malicious client to trigger an
18998 assertion failure and halt a hidden service. Fixes bug 15600;
18999 bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
19000 - Fix a bug that could cause a client to crash with an assertion
19001 failure when parsing a malformed hidden service descriptor. Fixes
19002 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
19004 o Minor features (DoS-resistance, hidden service):
19005 - Introduction points no longer allow multiple INTRODUCE1 cells to
19006 arrive on the same circuit. This should make it more expensive for
19007 attackers to overwhelm hidden services with introductions.
19008 Resolves ticket 15515.
19011 Changes in version 0.2.5.12 - 2015-04-06
19012 Tor 0.2.5.12 backports two fixes from 0.2.6.7 for security issues that
19013 could be used by an attacker to crash hidden services, or crash clients
19014 visiting hidden services. Hidden services should upgrade as soon as
19015 possible; clients should upgrade whenever packages become available.
19017 This release also backports a simple improvement to make hidden
19018 services a bit less vulnerable to denial-of-service attacks.
19020 o Major bugfixes (security, hidden service):
19021 - Fix an issue that would allow a malicious client to trigger an
19022 assertion failure and halt a hidden service. Fixes bug 15600;
19023 bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
19024 - Fix a bug that could cause a client to crash with an assertion
19025 failure when parsing a malformed hidden service descriptor. Fixes
19026 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
19028 o Minor features (DoS-resistance, hidden service):
19029 - Introduction points no longer allow multiple INTRODUCE1 cells to
19030 arrive on the same circuit. This should make it more expensive for
19031 attackers to overwhelm hidden services with introductions.
19032 Resolves ticket 15515.
19035 Changes in version 0.2.6.7 - 2015-04-06
19036 Tor 0.2.6.7 fixes two security issues that could be used by an
19037 attacker to crash hidden services, or crash clients visiting hidden
19038 services. Hidden services should upgrade as soon as possible; clients
19039 should upgrade whenever packages become available.
19041 This release also contains two simple improvements to make hidden
19042 services a bit less vulnerable to denial-of-service attacks.
19044 o Major bugfixes (security, hidden service):
19045 - Fix an issue that would allow a malicious client to trigger an
19046 assertion failure and halt a hidden service. Fixes bug 15600;
19047 bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
19048 - Fix a bug that could cause a client to crash with an assertion
19049 failure when parsing a malformed hidden service descriptor. Fixes
19050 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
19052 o Minor features (DoS-resistance, hidden service):
19053 - Introduction points no longer allow multiple INTRODUCE1 cells to
19054 arrive on the same circuit. This should make it more expensive for
19055 attackers to overwhelm hidden services with introductions.
19056 Resolves ticket 15515.
19057 - Decrease the amount of reattempts that a hidden service performs
19058 when its rendezvous circuits fail. This reduces the computational
19059 cost for running a hidden service under heavy load. Resolves
19063 Changes in version 0.2.6.6 - 2015-03-24
19064 Tor 0.2.6.6 is the first stable release in the 0.2.6 series.
19066 It adds numerous safety, security, correctness, and performance
19067 improvements. Client programs can be configured to use more kinds of
19068 sockets, AutomapHosts works better, the multithreading backend is
19069 improved, cell transmission is refactored, test coverage is much
19070 higher, more denial-of-service attacks are handled, guard selection is
19071 improved to handle long-term guards better, pluggable transports
19072 should work a bit better, and some annoying hidden service performance
19073 bugs should be addressed.
19075 o Minor bugfixes (portability):
19076 - Use the correct datatype in the SipHash-2-4 function to prevent
19077 compilers from assuming any sort of alignment. Fixes bug 15436;
19078 bugfix on 0.2.5.3-alpha.
19080 Changes in version 0.2.6.5-rc - 2015-03-18
19081 Tor 0.2.6.5-rc is the second and (hopefully) last release candidate in
19082 the 0.2.6. It fixes a small number of bugs found in 0.2.6.4-rc.
19084 o Major bugfixes (client):
19085 - Avoid crashing when making certain configuration option changes on
19086 clients. Fixes bug 15245; bugfix on 0.2.6.3-alpha. Reported
19089 o Major bugfixes (pluggable transports):
19090 - Initialize the extended OR Port authentication cookie before
19091 launching pluggable transports. This prevents a race condition
19092 that occurred when server-side pluggable transports would cache the
19093 authentication cookie before it has been (re)generated. Fixes bug
19094 15240; bugfix on 0.2.5.1-alpha.
19096 o Major bugfixes (portability):
19097 - Do not crash on startup when running on Solaris. Fixes a bug
19098 related to our fix for 9495; bugfix on 0.2.6.1-alpha. Reported
19101 o Minor features (heartbeat):
19102 - On relays, report how many connections we negotiated using each
19103 version of the Tor link protocols. This information will let us
19104 know if removing support for very old versions of the Tor
19105 protocols is harming the network. Closes ticket 15212.
19107 o Code simplification and refactoring:
19108 - Refactor main loop to extract the 'loop' part. This makes it
19109 easier to run Tor under Shadow. Closes ticket 15176.
19112 Changes in version 0.2.5.11 - 2015-03-17
19113 Tor 0.2.5.11 is the second stable release in the 0.2.5 series.
19115 It backports several bugfixes from the 0.2.6 branch, including a
19116 couple of medium-level security fixes for relays and exit nodes.
19117 It also updates the list of directory authorities.
19119 o Directory authority changes:
19120 - Remove turtles as a directory authority.
19121 - Add longclaw as a new (v3) directory authority. This implements
19122 ticket 13296. This keeps the directory authority count at 9.
19123 - The directory authority Faravahar has a new IP address. This
19124 closes ticket 14487.
19126 o Major bugfixes (crash, OSX, security):
19127 - Fix a remote denial-of-service opportunity caused by a bug in
19128 OSX's _strlcat_chk() function. Fixes bug 15205; bug first appeared
19131 o Major bugfixes (relay, stability, possible security):
19132 - Fix a bug that could lead to a relay crashing with an assertion
19133 failure if a buffer of exactly the wrong layout was passed to
19134 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
19135 0.2.0.10-alpha. Patch from 'cypherpunks'.
19136 - Do not assert if the 'data' pointer on a buffer is advanced to the
19137 very end of the buffer; log a BUG message instead. Only assert if
19138 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
19140 o Major bugfixes (exit node stability):
19141 - Fix an assertion failure that could occur under high DNS load.
19142 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
19143 diagnosed and fixed by "cypherpunks".
19145 o Major bugfixes (Linux seccomp2 sandbox):
19146 - Upon receiving sighup with the seccomp2 sandbox enabled, do not
19147 crash during attempts to call wait4. Fixes bug 15088; bugfix on
19148 0.2.5.1-alpha. Patch from "sanic".
19150 o Minor features (controller):
19151 - New "GETINFO bw-event-cache" to get information about recent
19152 bandwidth events. Closes ticket 14128. Useful for controllers to
19153 get recent bandwidth history after the fix for ticket 13988.
19155 o Minor features (geoip):
19156 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
19157 - Update geoip6 to the March 3 2015 Maxmind GeoLite2
19160 o Minor bugfixes (client, automapping):
19161 - Avoid crashing on torrc lines for VirtualAddrNetworkIPv[4|6] when
19162 no value follows the option. Fixes bug 14142; bugfix on
19163 0.2.4.7-alpha. Patch by "teor".
19164 - Fix a memory leak when using AutomapHostsOnResolve. Fixes bug
19165 14195; bugfix on 0.1.0.1-rc.
19167 o Minor bugfixes (compilation):
19168 - Build without warnings with the stock OpenSSL srtp.h header, which
19169 has a duplicate declaration of SSL_get_selected_srtp_profile().
19170 Fixes bug 14220; this is OpenSSL's bug, not ours.
19172 o Minor bugfixes (directory authority):
19173 - Allow directory authorities to fetch more data from one another if
19174 they find themselves missing lots of votes. Previously, they had
19175 been bumping against the 10 MB queued data limit. Fixes bug 14261;
19176 bugfix on 0.1.2.5-alpha.
19177 - Enlarge the buffer to read bwauth generated files to avoid an
19178 issue when parsing the file in dirserv_read_measured_bandwidths().
19179 Fixes bug 14125; bugfix on 0.2.2.1-alpha.
19181 o Minor bugfixes (statistics):
19182 - Increase period over which bandwidth observations are aggregated
19183 from 15 minutes to 4 hours. Fixes bug 13988; bugfix on 0.0.8pre1.
19185 o Minor bugfixes (preventative security, C safety):
19186 - When reading a hexadecimal, base-32, or base-64 encoded value from
19187 a string, always overwrite the whole output buffer. This prevents
19188 some bugs where we would look at (but fortunately, not reveal)
19189 uninitialized memory on the stack. Fixes bug 14013; bugfix on all
19193 Changes in version 0.2.4.26 - 2015-03-17
19194 Tor 0.2.4.26 includes an updated list of directory authorities. It
19195 also backports a couple of stability and security bugfixes from 0.2.5
19198 o Directory authority changes:
19199 - Remove turtles as a directory authority.
19200 - Add longclaw as a new (v3) directory authority. This implements
19201 ticket 13296. This keeps the directory authority count at 9.
19202 - The directory authority Faravahar has a new IP address. This
19203 closes ticket 14487.
19205 o Major bugfixes (exit node stability, also in 0.2.6.3-alpha):
19206 - Fix an assertion failure that could occur under high DNS load.
19207 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
19208 diagnosed and fixed by "cypherpunks".
19210 o Major bugfixes (relay, stability, possible security, also in 0.2.6.4-rc):
19211 - Fix a bug that could lead to a relay crashing with an assertion
19212 failure if a buffer of exactly the wrong layout was passed to
19213 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
19214 0.2.0.10-alpha. Patch from 'cypherpunks'.
19215 - Do not assert if the 'data' pointer on a buffer is advanced to the
19216 very end of the buffer; log a BUG message instead. Only assert if
19217 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
19219 o Minor features (geoip):
19220 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
19221 - Update geoip6 to the March 3 2015 Maxmind GeoLite2
19224 Changes in version 0.2.6.4-rc - 2015-03-09
19225 Tor 0.2.6.4-alpha fixes an issue in the directory code that an
19226 attacker might be able to use in order to crash certain Tor
19227 directories. It also resolves some minor issues left over from, or
19228 introduced in, Tor 0.2.6.3-alpha or earlier.
19230 o Major bugfixes (crash, OSX, security):
19231 - Fix a remote denial-of-service opportunity caused by a bug in
19232 OSX's _strlcat_chk() function. Fixes bug 15205; bug first appeared
19235 o Major bugfixes (relay, stability, possible security):
19236 - Fix a bug that could lead to a relay crashing with an assertion
19237 failure if a buffer of exactly the wrong layout is passed to
19238 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
19239 0.2.0.10-alpha. Patch from "cypherpunks".
19240 - Do not assert if the 'data' pointer on a buffer is advanced to the
19241 very end of the buffer; log a BUG message instead. Only assert if
19242 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
19244 o Major bugfixes (FreeBSD IPFW transparent proxy):
19245 - Fix address detection with FreeBSD transparent proxies, when
19246 "TransProxyType ipfw" is in use. Fixes bug 15064; bugfix
19249 o Major bugfixes (Linux seccomp2 sandbox):
19250 - Pass IPPROTO_TCP rather than 0 to socket(), so that the Linux
19251 seccomp2 sandbox doesn't fail. Fixes bug 14989; bugfix
19253 - Allow AF_UNIX hidden services to be used with the seccomp2
19254 sandbox. Fixes bug 15003; bugfix on 0.2.6.3-alpha.
19255 - Upon receiving sighup with the seccomp2 sandbox enabled, do not
19256 crash during attempts to call wait4. Fixes bug 15088; bugfix on
19257 0.2.5.1-alpha. Patch from "sanic".
19259 o Minor features (controller):
19260 - Messages about problems in the bootstrap process now include
19261 information about the server we were trying to connect to when we
19262 noticed the problem. Closes ticket 15006.
19264 o Minor features (geoip):
19265 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
19266 - Update geoip6 to the March 3 2015 Maxmind GeoLite2
19269 o Minor features (logs):
19270 - Quiet some log messages in the heartbeat and at startup. Closes
19273 o Minor bugfixes (certificate handling):
19274 - If an authority operator accidentally makes a signing certificate
19275 with a future publication time, do not discard its real signing
19276 certificates. Fixes bug 11457; bugfix on 0.2.0.3-alpha.
19277 - Remove any old authority certificates that have been superseded
19278 for at least two days. Previously, we would keep superseded
19279 certificates until they expired, if they were published close in
19280 time to the certificate that superseded them. Fixes bug 11454;
19281 bugfix on 0.2.1.8-alpha.
19283 o Minor bugfixes (compilation):
19284 - Fix a compilation warning on s390. Fixes bug 14988; bugfix
19286 - Fix a compilation warning on FreeBSD. Fixes bug 15151; bugfix
19289 o Minor bugfixes (testing):
19290 - Fix endianness issues in unit test for resolve_my_address() to
19291 have it pass on big endian systems. Fixes bug 14980; bugfix on
19293 - Avoid a side-effect in a tor_assert() in the unit tests. Fixes bug
19294 15188; bugfix on 0.1.2.3-alpha. Patch from Tom van der Woerdt.
19295 - When running the new 'make test-stem' target, use the configured
19296 python binary. Fixes bug 15037; bugfix on 0.2.6.3-alpha. Patch
19297 from "cypherpunks".
19298 - When running the zero-length-keys tests, do not use the default
19299 torrc file. Fixes bug 15033; bugfix on 0.2.6.3-alpha. Reported
19302 o Directory authority IP change:
19303 - The directory authority Faravahar has a new IP address. This
19304 closes ticket 14487.
19307 - Remove some lingering dead code that once supported mempools.
19308 Mempools were disabled by default in 0.2.5, and removed entirely
19309 in 0.2.6.3-alpha. Closes more of ticket 14848; patch
19313 Changes in version 0.2.6.3-alpha - 2015-02-19
19314 Tor 0.2.6.3-alpha is the third (and hopefully final) alpha release in
19315 the 0.2.6.x series. It introduces support for more kinds of sockets,
19316 makes it harder to accidentally run an exit, improves our
19317 multithreading backend, incorporates several fixes for the
19318 AutomapHostsOnResolve option, and fixes numerous other bugs besides.
19320 If no major regressions or security holes are found in this version,
19321 the next version will be a release candidate.
19323 o Deprecated versions:
19324 - Tor relays older than 0.2.4.18-rc are no longer allowed to
19325 advertise themselves on the network. Closes ticket 13555.
19327 o Major features (security, unix domain sockets):
19328 - Allow SocksPort to be an AF_UNIX Unix Domain Socket. Now high risk
19329 applications can reach Tor without having to create AF_INET or
19330 AF_INET6 sockets, meaning they can completely disable their
19331 ability to make non-Tor network connections. To create a socket of
19332 this type, use "SocksPort unix:/path/to/socket". Implements
19334 - Support mapping hidden service virtual ports to AF_UNIX sockets.
19335 The syntax is "HiddenServicePort 80 unix:/path/to/socket".
19336 Implements ticket 11485.
19338 o Major features (changed defaults):
19339 - Prevent relay operators from unintentionally running exits: When a
19340 relay is configured as an exit node, we now warn the user unless
19341 the "ExitRelay" option is set to 1. We warn even more loudly if
19342 the relay is configured with the default exit policy, since this
19343 can indicate accidental misconfiguration. Setting "ExitRelay 0"
19344 stops Tor from running as an exit relay. Closes ticket 10067.
19346 o Major features (directory system):
19347 - When downloading server- or microdescriptors from a directory
19348 server, we no longer launch multiple simultaneous requests to the
19349 same server. This reduces load on the directory servers,
19350 especially when directory guards are in use. Closes ticket 9969.
19351 - When downloading server- or microdescriptors over a tunneled
19352 connection, do not limit the length of our requests to what the
19353 Squid proxy is willing to handle. Part of ticket 9969.
19354 - Authorities can now vote on the correct digests and latest
19355 versions for different software packages. This allows packages
19356 that include Tor to use the Tor authority system as a way to get
19357 notified of updates and their correct digests. Implements proposal
19358 227. Closes ticket 10395.
19360 o Major features (guards):
19361 - Introduce the Guardfraction feature to improves load balancing on
19362 guard nodes. Specifically, it aims to reduce the traffic gap that
19363 guard nodes experience when they first get the Guard flag. This is
19364 a required step if we want to increase the guard lifetime to 9
19365 months or greater. Closes ticket 9321.
19367 o Major features (performance):
19368 - Make the CPU worker implementation more efficient by avoiding the
19369 kernel and lengthening pipelines. The original implementation used
19370 sockets to transfer data from the main thread to the workers, and
19371 didn't allow any thread to be assigned more than a single piece of
19372 work at once. The new implementation avoids communications
19373 overhead by making requests in shared memory, avoiding kernel IO
19374 where possible, and keeping more requests in flight at once.
19375 Implements ticket 9682.
19377 o Major features (relay):
19378 - Raise the minimum acceptable configured bandwidth rate for bridges
19379 to 50 KiB/sec and for relays to 75 KiB/sec. (The old values were
19380 20 KiB/sec.) Closes ticket 13822.
19382 o Major bugfixes (exit node stability):
19383 - Fix an assertion failure that could occur under high DNS load.
19384 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
19385 diagnosed and fixed by "cypherpunks".
19387 o Major bugfixes (mixed relay-client operation):
19388 - When running as a relay and client at the same time (not
19389 recommended), if we decide not to use a new guard because we want
19390 to retry older guards, only close the locally-originating circuits
19391 passing through that guard. Previously we would close all the
19392 circuits through that guard. Fixes bug 9819; bugfix on
19393 0.2.1.1-alpha. Reported by "skruffy".
19395 o Minor features (build):
19396 - New --disable-system-torrc compile-time option to prevent Tor from
19397 looking for the system-wide torrc or torrc-defaults files.
19398 Resolves ticket 13037.
19400 o Minor features (controller):
19401 - Include SOCKS_USERNAME and SOCKS_PASSWORD values in controller
19402 events so controllers can observe circuit isolation inputs. Closes
19404 - ControlPort now supports the unix:/path/to/socket syntax as an
19405 alternative to the ControlSocket option, for consistency with
19406 SocksPort and HiddenServicePort. Closes ticket 14451.
19407 - New "GETINFO bw-event-cache" to get information about recent
19408 bandwidth events. Closes ticket 14128. Useful for controllers to
19409 get recent bandwidth history after the fix for ticket 13988.
19411 o Minor features (Denial of service resistance):
19412 - Count the total number of bytes used storing hidden service
19413 descriptors against the value of MaxMemInQueues. If we're low on
19414 memory, and more than 20% of our memory is used holding hidden
19415 service descriptors, free them until no more than 10% of our
19416 memory holds hidden service descriptors. Free the least recently
19417 fetched descriptors first. Resolves ticket 13806.
19418 - When we have recently been under memory pressure (over 3/4 of
19419 MaxMemInQueues is allocated), then allocate smaller zlib objects
19420 for small requests. Closes ticket 11791.
19422 o Minor features (geoip):
19423 - Update geoip and geoip6 files to the January 7 2015 Maxmind
19424 GeoLite2 Country database.
19426 o Minor features (guard nodes):
19427 - Reduce the time delay before saving guard status to disk from 10
19428 minutes to 30 seconds (or from one hour to 10 minutes if
19429 AvoidDiskWrites is set). Closes ticket 12485.
19431 o Minor features (hidden service):
19432 - Make Sybil attacks against hidden services harder by changing the
19433 minimum time required to get the HSDir flag from 25 hours up to 96
19434 hours. Addresses ticket 14149.
19435 - New option "HiddenServiceAllowUnknownPorts" to allow hidden
19436 services to disable the anti-scanning feature introduced in
19437 0.2.6.2-alpha. With this option not set, a connection to an
19438 unlisted port closes the circuit. With this option set, only a
19439 RELAY_DONE cell is sent. Closes ticket 14084.
19441 o Minor features (interface):
19442 - Implement "-f -" command-line option to read torrc configuration
19443 from standard input, if you don't want to store the torrc file in
19444 the file system. Implements feature 13865.
19446 o Minor features (logging):
19447 - Add a count of unique clients to the bridge heartbeat message.
19448 Resolves ticket 6852.
19449 - Suppress "router info incompatible with extra info" message when
19450 reading extrainfo documents from cache. (This message got loud
19451 around when we closed bug 9812 in 0.2.6.2-alpha.) Closes
19453 - Elevate hidden service authorized-client message from DEBUG to
19454 INFO. Closes ticket 14015.
19456 o Minor features (stability):
19457 - Add assertions in our hash-table iteration code to check for
19458 corrupted values that could cause infinite loops. Closes
19461 o Minor features (systemd):
19462 - Various improvements and modernizations in systemd hardening
19463 support. Closes ticket 13805. Patch from Craig Andrews.
19465 o Minor features (testing networks):
19466 - Drop the minimum RendPostPeriod on a testing network to 5 seconds,
19467 and the default on a testing network to 2 minutes. Drop the
19468 MIN_REND_INITIAL_POST_DELAY on a testing network to 5 seconds, but
19469 keep the default on a testing network at 30 seconds. This reduces
19470 HS bootstrap time to around 25 seconds. Also, change the default
19471 time in test-network.sh to match. Closes ticket 13401. Patch
19473 - Create TestingDirAuthVoteHSDir to correspond to
19474 TestingDirAuthVoteExit/Guard. Ensures that authorities vote the
19475 HSDir flag for the listed relays regardless of uptime or ORPort
19476 connectivity. Respects the value of VoteOnHidServDirectoriesV2.
19477 Partial implementation for ticket 14067. Patch by "teor".
19479 o Minor features (tor2web mode):
19480 - Introduce the config option Tor2webRendezvousPoints, which allows
19481 clients in Tor2webMode to select a specific Rendezvous Point to be
19482 used in HS circuits. This might allow better performance for
19483 Tor2Web nodes. Implements ticket 12844.
19485 o Minor bugfixes (client DNS):
19486 - Report the correct cached DNS expiration times on SOCKS port or in
19487 DNS replies. Previously, we would report everything as "never
19488 expires." Fixes bug 14193; bugfix on 0.2.3.17-beta.
19489 - Avoid a small memory leak when we find a cached answer for a
19490 reverse DNS lookup in a client-side DNS cache. (Remember, client-
19491 side DNS caching is off by default, and is not recommended.) Fixes
19492 bug 14259; bugfix on 0.2.0.1-alpha.
19494 o Minor bugfixes (client, automapping):
19495 - Avoid crashing on torrc lines for VirtualAddrNetworkIPv[4|6] when
19496 no value follows the option. Fixes bug 14142; bugfix on
19497 0.2.4.7-alpha. Patch by "teor".
19498 - Fix a memory leak when using AutomapHostsOnResolve. Fixes bug
19499 14195; bugfix on 0.1.0.1-rc.
19500 - Prevent changes to other options from removing the wildcard value
19501 "." from "AutomapHostsSuffixes". Fixes bug 12509; bugfix
19503 - Allow MapAddress and AutomapHostsOnResolve to work together when
19504 an address is mapped into another address type (like .onion) that
19505 must be automapped at resolve time. Fixes bug 7555; bugfix
19508 o Minor bugfixes (client, bridges):
19509 - When we are using bridges and we had a network connectivity
19510 problem, only retry connecting to our currently configured
19511 bridges, not all bridges we know about and remember using. Fixes
19512 bug 14216; bugfix on 0.2.2.17-alpha.
19514 o Minor bugfixes (client, IPv6):
19515 - Reject socks requests to literal IPv6 addresses when IPv6Traffic
19516 flag is not set; and not because the NoIPv4Traffic flag was set.
19517 Previously we'd looked at the NoIPv4Traffic flag for both types of
19518 literal addresses. Fixes bug 14280; bugfix on 0.2.4.7-alpha.
19520 o Minor bugfixes (compilation):
19521 - The address of an array in the middle of a structure will always
19522 be non-NULL. clang recognises this and complains. Disable the
19523 tautologous and redundant check to silence this warning. Fixes bug
19524 14001; bugfix on 0.2.1.2-alpha.
19525 - Avoid warnings when building with systemd 209 or later. Fixes bug
19526 14072; bugfix on 0.2.6.2-alpha. Patch from "h.venev".
19527 - Compile correctly with (unreleased) OpenSSL 1.1.0 headers.
19528 Addresses ticket 14188.
19529 - Build without warnings with the stock OpenSSL srtp.h header, which
19530 has a duplicate declaration of SSL_get_selected_srtp_profile().
19531 Fixes bug 14220; this is OpenSSL's bug, not ours.
19532 - Do not compile any code related to Tor2Web mode when Tor2Web mode
19533 is not enabled at compile time. Previously, this code was included
19534 in a disabled state. See discussion on ticket 12844.
19535 - Remove the --disable-threads configure option again. It was
19536 accidentally partially reintroduced in 29ac883606d6d. Fixes bug
19537 14819; bugfix on 0.2.6.2-alpha.
19539 o Minor bugfixes (controller):
19540 - Report "down" in response to the "GETINFO entry-guards" command
19541 when relays are down with an unreachable_since value. Previously,
19542 we would report "up". Fixes bug 14184; bugfix on 0.1.2.2-alpha.
19543 - Avoid crashing on a malformed EXTENDCIRCUIT command. Fixes bug
19544 14116; bugfix on 0.2.2.9-alpha.
19545 - Add a code for the END_CIRC_REASON_IP_NOW_REDUNDANT circuit close
19546 reason. Fixes bug 14207; bugfix on 0.2.6.2-alpha.
19548 o Minor bugfixes (directory authority):
19549 - Allow directory authorities to fetch more data from one another if
19550 they find themselves missing lots of votes. Previously, they had
19551 been bumping against the 10 MB queued data limit. Fixes bug 14261;
19552 bugfix on 0.1.2.5-alpha.
19553 - Do not attempt to download extrainfo documents which we will be
19554 unable to validate with a matching server descriptor. Fixes bug
19555 13762; bugfix on 0.2.0.1-alpha.
19556 - Fix a bug that was truncating AUTHDIR_NEWDESC events sent to the
19557 control port. Fixes bug 14953; bugfix on 0.2.0.1-alpha.
19558 - Enlarge the buffer to read bwauth generated files to avoid an
19559 issue when parsing the file in dirserv_read_measured_bandwidths().
19560 Fixes bug 14125; bugfix on 0.2.2.1-alpha.
19562 o Minor bugfixes (file handling):
19563 - Stop failing when key files are zero-length. Instead, generate new
19564 keys, and overwrite the empty key files. Fixes bug 13111; bugfix
19565 on all versions of Tor. Patch by "teor".
19566 - Stop generating a fresh .old RSA onion key file when the .old file
19567 is missing. Fixes part of 13111; bugfix on 0.0.6rc1.
19568 - Avoid overwriting .old key files with empty key files.
19569 - Skip loading zero-length extrainfo store, router store, stats,
19570 state, and key files.
19571 - Avoid crashing when trying to reload a torrc specified as a
19572 relative path with RunAsDaemon turned on. Fixes bug 13397; bugfix
19575 o Minor bugfixes (hidden services):
19576 - Close the introduction circuit when we have no more usable intro
19577 points, instead of waiting for it to time out. This also ensures
19578 that no follow-up HS descriptor fetch is triggered when the
19579 circuit eventually times out. Fixes bug 14224; bugfix on 0.0.6.
19580 - When fetching a hidden service descriptor for a down service that
19581 was recently up, do not keep refetching until we try the same
19582 replica twice in a row. Fixes bug 14219; bugfix on 0.2.0.10-alpha.
19583 - Successfully launch Tor with a nonexistent hidden service
19584 directory. Our fix for bug 13942 didn't catch this case. Fixes bug
19585 14106; bugfix on 0.2.6.2-alpha.
19587 o Minor bugfixes (logging):
19588 - Avoid crashing when there are more log domains than entries in
19589 domain_list. Bugfix on 0.2.3.1-alpha.
19590 - Add a string representation for LD_SCHED. Fixes bug 14740; bugfix
19592 - Don't log messages to stdout twice when starting up. Fixes bug
19593 13993; bugfix on 0.2.6.1-alpha.
19595 o Minor bugfixes (parsing):
19596 - Stop accepting milliseconds (or other junk) at the end of
19597 descriptor publication times. Fixes bug 9286; bugfix on 0.0.2pre25.
19598 - Support two-number and three-number version numbers correctly, in
19599 case we change the Tor versioning system in the future. Fixes bug
19600 13661; bugfix on 0.0.8pre1.
19602 o Minor bugfixes (path counting):
19603 - When deciding whether the consensus lists any exit nodes, count
19604 the number listed in the consensus, not the number we have
19605 descriptors for. Fixes part of bug 14918; bugfix on 0.2.6.2-alpha.
19606 - When deciding whether we have any exit nodes, only examine
19607 ExitNodes when the ExitNodes option is actually set. Fixes part of
19608 bug 14918; bugfix on 0.2.6.2-alpha.
19609 - Get rid of redundant and possibly scary warnings that we are
19610 missing directory information while we bootstrap. Fixes part of
19611 bug 14918; bugfix on 0.2.6.2-alpha.
19613 o Minor bugfixes (portability):
19614 - Fix the ioctl()-based network interface lookup code so that it
19615 will work on systems that have variable-length struct ifreq, for
19617 - Fix scheduler compilation on targets where char is unsigned. Fixes
19618 bug 14764; bugfix on 0.2.6.2-alpha. Reported by Christian Kujau.
19620 o Minor bugfixes (sandbox):
19621 - Allow glibc fatal errors to be sent to stderr before Tor exits.
19622 Previously, glibc would try to write them to /dev/tty, and the
19623 sandbox would trap the call and make Tor exit prematurely. Fixes
19624 bug 14759; bugfix on 0.2.5.1-alpha.
19626 o Minor bugfixes (shutdown):
19627 - When shutting down, always call event_del() on lingering read or
19628 write events before freeing them. Otherwise, we risk double-frees
19629 or read-after-frees in event_base_free(). Fixes bug 12985; bugfix
19632 o Minor bugfixes (small memory leaks):
19633 - Avoid leaking memory when using IPv6 virtual address mappings.
19634 Fixes bug 14123; bugfix on 0.2.4.7-alpha. Patch by Tom van
19637 o Minor bugfixes (statistics):
19638 - Increase period over which bandwidth observations are aggregated
19639 from 15 minutes to 4 hours. Fixes bug 13988; bugfix on 0.0.8pre1.
19641 o Minor bugfixes (systemd support):
19642 - Fix detection and operation of systemd watchdog. Fixes part of bug
19643 14141; bugfix on 0.2.6.2-alpha. Patch from Tomasz Torcz.
19644 - Run correctly under systemd with the RunAsDaemon option set. Fixes
19645 part of bug 14141; bugfix on 0.2.5.7-rc. Patch from Tomasz Torcz.
19646 - Inform the systemd supervisor about more changes in the Tor
19647 process status. Implements part of ticket 14141. Patch from
19649 - Cause the "--disable-systemd" option to actually disable systemd
19650 support. Fixes bug 14350; bugfix on 0.2.6.2-alpha. Patch
19653 o Minor bugfixes (TLS):
19654 - Check more thoroughly throughout the TLS code for possible
19655 unlogged TLS errors. Possible diagnostic or fix for bug 13319.
19657 o Minor bugfixes (transparent proxy):
19658 - Use getsockname, not getsockopt, to retrieve the address for a
19659 TPROXY-redirected connection. Fixes bug 13796; bugfix
19662 o Code simplification and refactoring:
19663 - Move fields related to isolating and configuring client ports into
19664 a shared structure. Previously, they were duplicated across
19665 port_cfg_t, listener_connection_t, and edge_connection_t. Failure
19666 to copy them correctly had been the cause of at least one bug in
19667 the past. Closes ticket 8546.
19668 - Refactor the get_interface_addresses_raw() doom-function into
19669 multiple smaller and simpler subfunctions. Cover the resulting
19670 subfunctions with unit-tests. Fixes a significant portion of
19672 - Remove workaround in dirserv_thinks_router_is_hs_dir() that was
19673 only for version <= 0.2.2.24 which is now deprecated. Closes
19675 - Remove a test for a long-defunct broken version-one
19679 - Adding section on OpenBSD to our TUNING document. Thanks to mmcc
19680 for writing the OpenBSD-specific tips. Resolves ticket 13702.
19681 - Make the tor-resolve documentation match its help string and its
19682 options. Resolves part of ticket 14325.
19683 - Log a more useful error message from tor-resolve when failing to
19684 look up a hidden service address. Resolves part of ticket 14325.
19686 o Downgraded warnings:
19687 - Don't warn when we've attempted to contact a relay using the wrong
19688 ntor onion key. Closes ticket 9635.
19690 o Removed features:
19691 - To avoid confusion with the "ExitRelay" option, "ExitNode" is no
19692 longer silently accepted as an alias for "ExitNodes".
19693 - The --enable-mempool and --enable-buf-freelists options, which
19694 were originally created to work around bad malloc implementations,
19695 no longer exist. They were off-by-default in 0.2.5. Closes
19699 - Make the checkdir/perms test complete successfully even if the
19700 global umask is not 022. Fixes bug 14215; bugfix on 0.2.6.2-alpha.
19701 - Test that tor does not fail when key files are zero-length. Check
19702 that tor generates new keys, and overwrites the empty key files.
19703 - Test that tor generates new keys when keys are missing
19704 (existing behavior).
19705 - Test that tor does not overwrite key files that already contain
19706 data (existing behavior). Tests bug 13111. Patch by "teor".
19707 - New "make test-stem" target to run stem integration tests.
19708 Requires that the "STEM_SOURCE_DIR" environment variable be set.
19709 Closes ticket 14107.
19710 - Make the test_cmdline_args.py script work correctly on Windows.
19711 Patch from Gisle Vanem.
19712 - Move the slower unit tests into a new "./src/test/test-slow"
19713 binary that can be run independently of the other tests. Closes
19715 - Avoid undefined behavior when sampling huge values from the
19716 Laplace distribution. This made unittests fail on Raspberry Pi.
19717 Bug found by Device. Fixes bug 14090; bugfix on 0.2.6.2-alpha.
19720 Changes in version 0.2.6.2-alpha - 2014-12-31
19721 Tor 0.2.6.2-alpha is the second alpha release in the 0.2.6.x series.
19722 It introduces a major new backend for deciding when to send cells on
19723 channels, which should lead down the road to big performance
19724 increases. It contains security and statistics features for better
19725 work on hidden services, and numerous bugfixes.
19727 This release contains many new unit tests, along with major
19728 performance improvements for running testing networks using Chutney.
19729 Thanks to a series of patches contributed by "teor", testing networks
19730 should now bootstrap in seconds, rather than minutes.
19732 o Major features (relay, infrastructure):
19733 - Complete revision of the code that relays use to decide which cell
19734 to send next. Formerly, we selected the best circuit to write on
19735 each channel, but we didn't select among channels in any
19736 sophisticated way. Now, we choose the best circuits globally from
19737 among those whose channels are ready to deliver traffic.
19739 This patch implements a new inter-cmux comparison API, a global
19740 high/low watermark mechanism and a global scheduler loop for
19741 transmission prioritization across all channels as well as among
19742 circuits on one channel. This schedule is currently tuned to
19743 (tolerantly) avoid making changes in network performance, but it
19744 should form the basis for major circuit performance increases in
19745 the future. Code by Andrea; tuning by Rob Jansen; implements
19748 o Major features (hidden services):
19749 - Make HS port scanning more difficult by immediately closing the
19750 circuit when a user attempts to connect to a nonexistent port.
19751 Closes ticket 13667.
19752 - Add a HiddenServiceStatistics option that allows Tor relays to
19753 gather and publish statistics about the overall size and volume of
19754 hidden service usage. Specifically, when this option is turned on,
19755 an HSDir will publish an approximate number of hidden services
19756 that have published descriptors to it the past 24 hours. Also, if
19757 a relay has acted as a hidden service rendezvous point, it will
19758 publish the approximate amount of rendezvous cells it has relayed
19759 the past 24 hours. The statistics themselves are obfuscated so
19760 that the exact values cannot be derived. For more details see
19761 proposal 238, "Better hidden service stats from Tor relays". This
19762 feature is currently disabled by default. Implements feature 13192.
19764 o Major bugfixes (client, automap):
19765 - Repair automapping with IPv6 addresses. This automapping should
19766 have worked previously, but one piece of debugging code that we
19767 inserted to detect a regression actually caused the regression to
19768 manifest itself again. Fixes bug 13811 and bug 12831; bugfix on
19769 0.2.4.7-alpha. Diagnosed and fixed by Francisco Blas
19772 o Major bugfixes (hidden services):
19773 - When closing an introduction circuit that was opened in parallel
19774 with others, don't mark the introduction point as unreachable.
19775 Previously, the first successful connection to an introduction
19776 point would make the other introduction points get marked as
19777 having timed out. Fixes bug 13698; bugfix on 0.0.6rc2.
19779 o Directory authority changes:
19780 - Remove turtles as a directory authority.
19781 - Add longclaw as a new (v3) directory authority. This implements
19782 ticket 13296. This keeps the directory authority count at 9.
19784 o Major removed features:
19785 - Tor clients no longer support connecting to hidden services
19786 running on Tor 0.2.2.x and earlier; the Support022HiddenServices
19787 option has been removed. (There shouldn't be any hidden services
19788 running these versions on the network.) Closes ticket 7803.
19790 o Minor features (client):
19791 - Validate hostnames in SOCKS5 requests more strictly. If SafeSocks
19792 is enabled, reject requests with IP addresses as hostnames.
19793 Resolves ticket 13315.
19795 o Minor features (controller):
19796 - Add a "SIGNAL HEARTBEAT" controller command that tells Tor to
19797 write an unscheduled heartbeat message to the log. Implements
19800 o Minor features (geoip):
19801 - Update geoip and geoip6 to the November 15 2014 Maxmind GeoLite2
19804 o Minor features (hidden services):
19805 - When re-enabling the network, don't try to build introduction
19806 circuits until we have successfully built a circuit. This makes
19807 hidden services come up faster when the network is re-enabled.
19808 Patch from "akwizgran". Closes ticket 13447.
19809 - When we fail to retrieve a hidden service descriptor, send the
19810 controller an "HS_DESC FAILED" controller event. Implements
19812 - New HiddenServiceDirGroupReadable option to cause hidden service
19813 directories and hostname files to be created group-readable. Patch
19814 from "anon", David Stainton, and "meejah". Closes ticket 11291.
19816 o Minor features (systemd):
19817 - Where supported, when running with systemd, report successful
19818 startup to systemd. Part of ticket 11016. Patch by Michael Scherer.
19819 - When running with systemd, support systemd watchdog messages. Part
19820 of ticket 11016. Patch by Michael Scherer.
19822 o Minor features (transparent proxy):
19823 - Update the transparent proxy option checks to allow for both ipfw
19824 and pf on OS X. Closes ticket 14002.
19825 - Use the correct option when using IPv6 with transparent proxy
19826 support on Linux. Resolves 13808. Patch by Francisco Blas
19829 o Minor bugfixes (preventative security, C safety):
19830 - When reading a hexadecimal, base-32, or base-64 encoded value from
19831 a string, always overwrite the whole output buffer. This prevents
19832 some bugs where we would look at (but fortunately, not reveal)
19833 uninitialized memory on the stack. Fixes bug 14013; bugfix on all
19835 - Clear all memory targeted by tor_addr_{to,from}_sockaddr(), not
19836 just the part that's used. This makes it harder for data leak bugs
19837 to occur in the event of other programming failures. Resolves
19840 o Minor bugfixes (client, microdescriptors):
19841 - Use a full 256 bits of the SHA256 digest of a microdescriptor when
19842 computing which microdescriptors to download. This keeps us from
19843 erroneous download behavior if two microdescriptor digests ever
19844 have the same first 160 bits. Fixes part of bug 13399; bugfix
19846 - Reset a router's status if its microdescriptor digest changes,
19847 even if the first 160 bits remain the same. Fixes part of bug
19848 13399; bugfix on 0.2.3.1-alpha.
19850 o Minor bugfixes (compilation):
19851 - Silence clang warnings under --enable-expensive-hardening,
19852 including implicit truncation of 64 bit values to 32 bit, const
19853 char assignment to self, tautological compare, and additional
19854 parentheses around equality tests. Fixes bug 13577; bugfix
19856 - Fix a clang warning about checking whether an address in the
19857 middle of a structure is NULL. Fixes bug 14001; bugfix
19860 o Minor bugfixes (hidden services):
19861 - Correctly send a controller event when we find that a rendezvous
19862 circuit has finished. Fixes bug 13936; bugfix on 0.1.1.5-alpha.
19863 - Pre-check directory permissions for new hidden-services to avoid
19864 at least one case of "Bug: Acting on config options left us in a
19865 broken state. Dying." Fixes bug 13942; bugfix on 0.0.6pre1.
19866 - When adding a new hidden service (for example, via SETCONF), Tor
19867 no longer congratulates the user for running a relay. Fixes bug
19868 13941; bugfix on 0.2.6.1-alpha.
19869 - When fetching hidden service descriptors, we now check not only
19870 for whether we got the hidden service we had in mind, but also
19871 whether we got the particular descriptors we wanted. This prevents
19872 a class of inefficient but annoying DoS attacks by hidden service
19873 directories. Fixes bug 13214; bugfix on 0.2.1.6-alpha. Reported
19876 o Minor bugfixes (Linux seccomp2 sandbox):
19877 - Make transparent proxy support work along with the seccomp2
19878 sandbox. Fixes part of bug 13808; bugfix on 0.2.5.1-alpha. Patch
19879 by Francisco Blas Izquierdo Riera.
19880 - Fix a memory leak in tor-resolve when running with the sandbox
19881 enabled. Fixes bug 14050; bugfix on 0.2.5.9-rc.
19883 o Minor bugfixes (logging):
19884 - Downgrade warnings about RSA signature failures to info log level.
19885 Emit a warning when an extra info document is found incompatible
19886 with a corresponding router descriptor. Fixes bug 9812; bugfix
19888 - Make connection_ap_handshake_attach_circuit() log the circuit ID
19889 correctly. Fixes bug 13701; bugfix on 0.0.6.
19891 o Minor bugfixes (misc):
19892 - Stop allowing invalid address patterns like "*/24" that contain
19893 both a wildcard address and a bit prefix length. This affects all
19894 our address-range parsing code. Fixes bug 7484; bugfix
19897 o Minor bugfixes (testing networks, fast startup):
19898 - Allow Tor to build circuits using a consensus with no exits. If
19899 the consensus has no exits (typical of a bootstrapping test
19900 network), allow Tor to build circuits once enough descriptors have
19901 been downloaded. This assists in bootstrapping a testing Tor
19902 network. Fixes bug 13718; bugfix on 0.2.4.10-alpha. Patch
19904 - When V3AuthVotingInterval is low, give a lower If-Modified-Since
19905 header to directory servers. This allows us to obtain consensuses
19906 promptly when the consensus interval is very short. This assists
19907 in bootstrapping a testing Tor network. Fixes parts of bugs 13718
19908 and 13963; bugfix on 0.2.0.3-alpha. Patch by "teor".
19909 - Stop assuming that private addresses are local when checking
19910 reachability in a TestingTorNetwork. Instead, when testing, assume
19911 all OR connections are remote. (This is necessary due to many test
19912 scenarios running all relays on localhost.) This assists in
19913 bootstrapping a testing Tor network. Fixes bug 13924; bugfix on
19914 0.1.0.1-rc. Patch by "teor".
19915 - Avoid building exit circuits from a consensus with no exits. Now
19916 thanks to our fix for 13718, we accept a no-exit network as not
19917 wholly lost, but we need to remember not to try to build exit
19918 circuits on it. Closes ticket 13814; patch by "teor".
19919 - Stop requiring exits to have non-zero bandwithcapacity in a
19920 TestingTorNetwork. Instead, when TestingMinExitFlagThreshold is 0,
19921 ignore exit bandwidthcapacity. This assists in bootstrapping a
19922 testing Tor network. Fixes parts of bugs 13718 and 13839; bugfix
19923 on 0.2.0.3-alpha. Patch by "teor".
19924 - Add "internal" to some bootstrap statuses when no exits are
19925 available. If the consensus does not contain Exits, Tor will only
19926 build internal circuits. In this case, relevant statuses will
19927 contain the word "internal" as indicated in the Tor control-
19928 spec.txt. When bootstrap completes, Tor will be ready to build
19929 internal circuits. If a future consensus contains Exits, exit
19930 circuits may become available. Fixes part of bug 13718; bugfix on
19931 0.2.4.10-alpha. Patch by "teor".
19932 - Decrease minimum consensus interval to 10 seconds when
19933 TestingTorNetwork is set, or 5 seconds for the first consensus.
19934 Fix assumptions throughout the code that assume larger intervals.
19935 Fixes bugs 13718 and 13823; bugfix on 0.2.0.3-alpha. Patch
19937 - Avoid excluding guards from path building in minimal test
19938 networks, when we're in a test network and excluding guards would
19939 exclude all relays. This typically occurs in incredibly small tor
19940 networks, and those using "TestingAuthVoteGuard *". Fixes part of
19941 bug 13718; bugfix on 0.1.1.11-alpha. Patch by "teor".
19943 o Code simplification and refactoring:
19944 - Stop using can_complete_circuits as a global variable; access it
19945 with a function instead.
19946 - Avoid using operators directly as macro arguments: this lets us
19947 apply coccinelle transformations to our codebase more directly.
19948 Closes ticket 13172.
19949 - Combine the functions used to parse ClientTransportPlugin and
19950 ServerTransportPlugin into a single function. Closes ticket 6456.
19951 - Add inline functions and convenience macros for inspecting channel
19952 state. Refactor the code to use convenience macros instead of
19953 checking channel state directly. Fixes issue 7356.
19954 - Document all members of was_router_added_t and rename
19955 ROUTER_WAS_NOT_NEW to ROUTER_IS_ALREADY_KNOWN to make it less
19956 confusable with ROUTER_WAS_TOO_OLD. Fixes issue 13644.
19957 - In connection_exit_begin_conn(), use END_CIRC_REASON_TORPROTOCOL
19958 constant instead of hardcoded value. Fixes issue 13840.
19959 - Refactor our generic strmap and digestmap types into a single
19960 implementation, so that we can add a new digest256map
19964 - Document the bridge-authority-only 'networkstatus-bridges' file.
19965 Closes ticket 13713; patch from "tom".
19966 - Fix typo in PredictedPortsRelevanceTime option description in
19967 manpage. Resolves issue 13707.
19968 - Stop suggesting that users specify relays by nickname: it isn't a
19969 good idea. Also, properly cross-reference how to specify relays in
19970 all parts of manual documenting options that take a list of
19971 relays. Closes ticket 13381.
19972 - Clarify the HiddenServiceDir option description in manpage to make
19973 it clear that relative paths are taken with respect to the current
19974 working directory. Also clarify that this behavior is not
19975 guaranteed to remain indefinitely. Fixes issue 13913.
19978 - New tests for many parts of channel, relay, and circuitmux
19979 functionality. Code by Andrea; part of 9262.
19980 - New tests for parse_transport_line(). Part of ticket 6456.
19981 - In the unit tests, use chgrp() to change the group of the unit
19982 test temporary directory to the current user, so that the sticky
19983 bit doesn't interfere with tests that check directory groups.
19985 - Add unit tests for resolve_my_addr(). Part of ticket 12376; patch
19989 Changes in version 0.2.6.1-alpha - 2014-10-30
19990 Tor 0.2.6.1-alpha is the first release in the Tor 0.2.6.x series. It
19991 includes numerous code cleanups and new tests, and fixes a large
19992 number of annoying bugs. Out-of-memory conditions are handled better
19993 than in 0.2.5, pluggable transports have improved proxy support, and
19994 clients now use optimistic data for contacting hidden services. Also,
19995 we are now more robust to changes in what we consider a parseable
19996 directory object, so that tightening restrictions does not have a risk
19997 of introducing infinite download loops.
19999 This is the first alpha release in a new series, so expect there to be
20000 bugs. Users who would rather test out a more stable branch should stay
20001 with 0.2.5.x for now.
20003 o New compiler and system requirements:
20004 - Tor 0.2.6.x requires that your compiler support more of the C99
20005 language standard than before. The 'configure' script now detects
20006 whether your compiler supports C99 mid-block declarations and
20007 designated initializers. If it does not, Tor will not compile.
20009 We may revisit this requirement if it turns out that a significant
20010 number of people need to build Tor with compilers that don't
20011 bother implementing a 15-year-old standard. Closes ticket 13233.
20012 - Tor no longer supports systems without threading support. When we
20013 began working on Tor, there were several systems that didn't have
20014 threads, or where the thread support wasn't able to run the
20015 threads of a single process on multiple CPUs. That no longer
20016 holds: every system where Tor needs to run well now has threading
20017 support. Resolves ticket 12439.
20019 o Removed platform support:
20020 - We no longer include special code to build on Windows CE; as far
20021 as we know, nobody has used Tor on Windows CE in a very long time.
20022 Closes ticket 11446.
20024 o Major features (bridges):
20025 - Expose the outgoing upstream HTTP/SOCKS proxy to pluggable
20026 transports if they are configured via the "TOR_PT_PROXY"
20027 environment variable. Implements proposal 232. Resolves
20030 o Major features (client performance, hidden services):
20031 - Allow clients to use optimistic data when connecting to a hidden
20032 service, which should remove a round-trip from hidden service
20033 initialization. See proposal 181 for details. Implements
20036 o Major features (directory system):
20037 - Upon receiving an unparseable directory object, if its digest
20038 matches what we expected, then don't try to download it again.
20039 Previously, when we got a descriptor we didn't like, we would keep
20040 trying to download it over and over. Closes ticket 11243.
20042 o Major features (sample torrc):
20043 - Add a new, infrequently-changed "torrc.minimal". This file is
20044 similar to torrc.sample, but it will change as infrequently as
20045 possible, for the benefit of users whose systems prompt them for
20046 intervention whenever a default configuration file is changed.
20047 Making this change allows us to update torrc.sample to be a more
20048 generally useful "sample torrc".
20050 o Major bugfixes (directory authorities):
20051 - Do not assign the HSDir flag to relays if they are not Valid, or
20052 currently hibernating. Fixes 12573; bugfix on 0.2.0.10-alpha.
20054 o Major bugfixes (directory bandwidth performance):
20055 - Don't flush the zlib buffer aggressively when compressing
20056 directory information for clients. This should save about 7% of
20057 the bandwidth currently used for compressed descriptors and
20058 microdescriptors. Fixes bug 11787; bugfix on 0.1.1.23.
20060 o Minor features (security, memory wiping):
20061 - Ensure we securely wipe keys from memory after
20062 crypto_digest_get_digest and init_curve25519_keypair_from_file
20063 have finished using them. Resolves ticket 13477.
20065 o Minor features (security, out-of-memory handling):
20066 - When handling an out-of-memory condition, allocate less memory for
20067 temporary data structures. Fixes issue 10115.
20068 - When handling an out-of-memory condition, consider more types of
20069 buffers, including those on directory connections, and zlib
20070 buffers. Resolves ticket 11792.
20073 - When identity keypair is generated for first time, log a
20074 congratulatory message that links to the new relay lifecycle
20075 document. Implements feature 10427.
20077 o Minor features (client):
20078 - Clients are now willing to send optimistic data (before they
20079 receive a 'connected' cell) to relays of any version. (Relays
20080 without support for optimistic data are no longer supported on the
20081 Tor network.) Resolves ticket 13153.
20083 o Minor features (directory authorities):
20084 - Don't list relays with a bandwidth estimate of 0 in the consensus.
20085 Implements a feature proposed during discussion of bug 13000.
20086 - In tor-gencert, report an error if the user provides the same
20087 argument more than once.
20088 - If a directory authority can't find a best consensus method in the
20089 votes that it holds, it now falls back to its favorite consensus
20090 method. Previously, it fell back to method 1. Neither of these is
20091 likely to get enough signatures, but "fall back to favorite"
20092 doesn't require us to maintain support an obsolete consensus
20093 method. Implements part of proposal 215.
20095 o Minor features (logging):
20096 - On Unix-like systems, you can now use named pipes as the target of
20097 the Log option, and other options that try to append to files.
20098 Closes ticket 12061. Patch from "carlo von lynX".
20099 - When opening a log file at startup, send it every log message that
20100 we generated between startup and opening it. Previously, log
20101 messages that were generated before opening the log file were only
20102 logged to stdout. Closes ticket 6938.
20103 - Add a TruncateLogFile option to overwrite logs instead of
20104 appending to them. Closes ticket 5583.
20106 o Minor features (portability, Solaris):
20107 - Threads are no longer disabled by default on Solaris; we believe
20108 that the versions of Solaris with broken threading support are all
20109 obsolete by now. Resolves ticket 9495.
20111 o Minor features (relay):
20112 - Re-check our address after we detect a changed IP address from
20113 getsockname(). This ensures that the controller command "GETINFO
20114 address" will report the correct value. Resolves ticket 11582.
20116 - A new AccountingRule option lets Relays set whether they'd like
20117 AccountingMax to be applied separately to inbound and outbound
20118 traffic, or applied to the sum of inbound and outbound traffic.
20119 Resolves ticket 961. Patch by "chobe".
20121 o Minor features (testing networks):
20122 - Add the TestingDirAuthVoteExit option, which lists nodes to assign
20123 the "Exit" flag regardless of their uptime, bandwidth, or exit
20124 policy. TestingTorNetwork must be set for this option to have any
20125 effect. Previously, authorities would take up to 35 minutes to
20126 give nodes the Exit flag in a test network. Partially implements
20129 o Minor features (validation):
20130 - Check all date/time values passed to tor_timegm and
20131 parse_rfc1123_time for validity, taking leap years into account.
20132 Improves HTTP header validation. Implemented with bug 13476.
20133 - In correct_tm(), limit the range of values returned by system
20134 localtime(_r) and gmtime(_r) to be between the years 1 and 8099.
20135 This means we don't have to deal with negative or too large dates,
20136 even if a clock is wrong. Otherwise we might fail to read a file
20137 written by us which includes such a date. Fixes bug 13476.
20139 o Minor bugfixes (bridge clients):
20140 - When configured to use a bridge without an identity digest (not
20141 recommended), avoid launching an extra channel to it when
20142 bootstrapping. Fixes bug 7733; bugfix on 0.2.4.4-alpha.
20144 o Minor bugfixes (bridges):
20145 - When DisableNetwork is set, do not launch pluggable transport
20146 plugins, and if any are running, terminate them. Fixes bug 13213;
20147 bugfix on 0.2.3.6-alpha.
20149 o Minor bugfixes (C correctness):
20150 - Fix several instances of possible integer overflow/underflow/NaN.
20151 Fixes bug 13104; bugfix on 0.2.3.1-alpha and later. Patches
20153 - In circuit_build_times_calculate_timeout() in circuitstats.c,
20154 avoid dividing by zero in the pareto calculations. This traps
20155 under clang's "undefined-trap" sanitizer. Fixes bug 13290; bugfix
20157 - Fix an integer overflow in format_time_interval(). Fixes bug
20158 13393; bugfix on 0.2.0.10-alpha.
20159 - Set the correct day of year value when the system's localtime(_r)
20160 or gmtime(_r) functions fail to set struct tm. Not externally
20161 visible. Fixes bug 13476; bugfix on 0.0.2pre14.
20162 - Avoid unlikely signed integer overflow in tor_timegm on systems
20163 with 32-bit time_t. Fixes bug 13476; bugfix on 0.0.2pre14.
20165 o Minor bugfixes (client):
20166 - Fix smartlist_choose_node_by_bandwidth() so that relays with the
20167 BadExit flag are not considered worthy candidates. Fixes bug
20168 13066; bugfix on 0.1.2.3-alpha.
20169 - Use the consensus schedule for downloading consensuses, and not
20170 the generic schedule. Fixes bug 11679; bugfix on 0.2.2.6-alpha.
20171 - Handle unsupported or malformed SOCKS5 requests properly by
20172 responding with the appropriate error message before closing the
20173 connection. Fixes bugs 12971 and 13314; bugfix on 0.0.2pre13.
20175 o Minor bugfixes (client, torrc):
20176 - Stop modifying the value of our DirReqStatistics torrc option just
20177 because we're not a bridge or relay. This bug was causing Tor
20178 Browser users to write "DirReqStatistics 0" in their torrc files
20179 as if they had chosen to change the config. Fixes bug 4244; bugfix
20181 - When GeoIPExcludeUnknown is enabled, do not incorrectly decide
20182 that our options have changed every time we SIGHUP. Fixes bug
20183 9801; bugfix on 0.2.4.10-alpha. Patch from "qwerty1".
20185 o Minor bugfixes (controller):
20186 - Return an error when the second or later arguments of the
20187 "setevents" controller command are invalid events. Previously we
20188 would return success while silently skipping invalid events. Fixes
20189 bug 13205; bugfix on 0.2.3.2-alpha. Reported by "fpxnns".
20191 o Minor bugfixes (directory system):
20192 - Always believe that v3 directory authorities serve extra-info
20193 documents, whether they advertise "caches-extra-info" or not.
20194 Fixes part of bug 11683; bugfix on 0.2.0.1-alpha.
20195 - When running as a v3 directory authority, advertise that you serve
20196 extra-info documents so that clients who want them can find them
20197 from you too. Fixes part of bug 11683; bugfix on 0.2.0.1-alpha.
20198 - Check the BRIDGE_DIRINFO flag bitwise rather than using equality.
20199 Previously, directories offering BRIDGE_DIRINFO and some other
20200 flag (i.e. microdescriptors or extrainfo) would be ignored when
20201 looking for bridges. Partially fixes bug 13163; bugfix
20204 o Minor bugfixes (networking):
20205 - Check for orconns and use connection_or_close_for_error() rather
20206 than connection_mark_for_close() directly in the getsockopt()
20207 failure case of connection_handle_write_impl(). Fixes bug 11302;
20208 bugfix on 0.2.4.4-alpha.
20210 o Minor bugfixes (relay):
20211 - When generating our family list, remove spaces from around the
20212 entries. Fixes bug 12728; bugfix on 0.2.1.7-alpha.
20213 - If our previous bandwidth estimate was 0 bytes, allow publishing a
20214 new relay descriptor immediately. Fixes bug 13000; bugfix
20217 o Minor bugfixes (testing networks):
20218 - Fix TestingDirAuthVoteGuard to properly give out Guard flags in a
20219 testing network. Fixes bug 13064; bugfix on 0.2.5.2-alpha.
20220 - Stop using the default authorities in networks which provide both
20221 AlternateDirAuthority and AlternateBridgeAuthority. Partially
20222 fixes bug 13163; bugfix on 0.2.0.13-alpha.
20224 o Minor bugfixes (testing):
20225 - Stop spawn test failures due to a race condition between the
20226 SIGCHLD handler updating the process status, and the test reading
20227 it. Fixes bug 13291; bugfix on 0.2.3.3-alpha.
20229 o Minor bugfixes (testing, Windows):
20230 - Avoid passing an extra backslash when creating a temporary
20231 directory for running the unit tests on Windows. Fixes bug 12392;
20232 bugfix on 0.2.2.25-alpha. Patch from Gisle Vanem.
20234 o Minor bugfixes (windows):
20235 - Remove code to special-case handling of NTE_BAD_KEYSET when
20236 acquiring windows CryptoAPI context. This error can't actually
20237 occur for the parameters we're providing. Fixes bug 10816; bugfix
20240 o Minor bugfixes (zlib):
20241 - Avoid truncating a zlib stream when trying to finalize it with an
20242 empty output buffer. Fixes bug 11824; bugfix on 0.1.1.23.
20245 - Allow our configure script to build correctly with autoconf 2.62
20246 again. Fixes bug 12693; bugfix on 0.2.5.2-alpha.
20247 - Improve the error message from ./configure to make it clear that
20248 when asciidoc has not been found, the user will have to either add
20249 --disable-asciidoc argument or install asciidoc. Resolves
20252 o Code simplification and refactoring:
20253 - Change the entry_is_live() function to take named bitfield
20254 elements instead of an unnamed list of booleans. Closes
20256 - Refactor and unit-test entry_is_time_to_retry() in entrynodes.c.
20257 Resolves ticket 12205.
20258 - Use calloc and reallocarray functions instead of multiply-
20259 then-malloc. This makes it less likely for us to fall victim to an
20260 integer overflow attack when allocating. Resolves ticket 12855.
20261 - Use the standard macro name SIZE_MAX, instead of our
20263 - Document usage of the NO_DIRINFO and ALL_DIRINFO flags clearly in
20264 functions which take them as arguments. Replace 0 with NO_DIRINFO
20265 in a function call for clarity. Seeks to prevent future issues
20267 - Avoid 4 null pointer errors under clang static analysis by using
20268 tor_assert() to prove that the pointers aren't null. Fixes
20270 - Rework the API of policies_parse_exit_policy() to use a bitmask to
20271 represent parsing options, instead of a confusing mess of
20272 booleans. Resolves ticket 8197.
20273 - Introduce a helper function to parse ExitPolicy in
20274 or_options_t structure.
20277 - Add a doc/TUNING document with tips for handling large numbers of
20278 TCP connections when running busy Tor relay. Update the warning
20279 message to point to this file when running out of sockets
20280 operating system is allowing to use simultaneously. Resolves
20283 o Removed features:
20284 - We no longer remind the user about configuration options that have
20285 been obsolete since 0.2.3.x or earlier. Patch by Adrien Bak.
20286 - Remove our old, non-weighted bandwidth-based node selection code.
20287 Previously, we used it as a fallback when we couldn't perform
20288 weighted bandwidth-based node selection. But that would only
20289 happen in the cases where we had no consensus, or when we had a
20290 consensus generated by buggy or ancient directory authorities. In
20291 either case, it's better to use the more modern, better maintained
20292 algorithm, with reasonable defaults for the weights. Closes
20294 - Remove the --disable-curve25519 configure option. Relays and
20295 clients now are required to support curve25519 and the
20297 - The old "StrictEntryNodes" and "StrictExitNodes" options, which
20298 used to be deprecated synonyms for "StrictNodes", are now marked
20299 obsolete. Resolves ticket 12226.
20300 - Clients don't understand the BadDirectory flag in the consensus
20301 anymore, and ignore it.
20304 - Refactor the function that chooses guard nodes so that it can more
20305 easily be tested; write some tests for it.
20306 - Fix and re-enable the fgets_eagain unit test. Fixes bug 12503;
20307 bugfix on 0.2.3.1-alpha. Patch from "cypherpunks."
20308 - Create unit tests for format_time_interval(). With bug 13393.
20309 - Add unit tests for tor_timegm signed overflow, tor_timegm and
20310 parse_rfc1123_time validity checks, correct_tm year clamping. Unit
20311 tests (visible) fixes in bug 13476.
20312 - Add a "coverage-html" make target to generate HTML-visualized
20313 coverage results when building with --enable-coverage. (Requires
20314 lcov.) Patch from Kevin Murray.
20315 - Enable the backtrace handler (where supported) when running the
20317 - Revise all unit tests that used the legacy test_* macros to
20318 instead use the recommended tt_* macros. This patch was generated
20319 with coccinelle, to avoid manual errors. Closes ticket 13119.
20321 o Distribution (systemd):
20322 - systemd unit file: only allow tor to write to /var/lib/tor and
20323 /var/log/tor. The rest of the filesystem is accessible for reading
20324 only. Patch by intrigeri; resolves ticket 12751.
20325 - systemd unit file: ensure that the process and all its children
20326 can never gain new privileges. Patch by intrigeri; resolves
20328 - systemd unit file: set up /var/run/tor as writable for the Tor
20329 service. Patch by intrigeri; resolves ticket 13196.
20331 o Removed features (directory authorities):
20332 - Remove code that prevented authorities from listing Tor relays
20333 affected by CVE-2011-2769 as guards. These relays are already
20334 rejected altogether due to the minimum version requirement of
20335 0.2.3.16-alpha. Closes ticket 13152.
20336 - The "AuthDirRejectUnlisted" option no longer has any effect, as
20337 the fingerprints file (approved-routers) has been deprecated.
20338 - Directory authorities do not support being Naming dirauths anymore.
20339 The "NamingAuthoritativeDir" config option is now obsolete.
20340 - Directory authorities do not support giving out the BadDirectory
20342 - Directory authorities no longer advertise or support consensus
20343 methods 1 through 12 inclusive. These consensus methods were
20344 obsolete and/or insecure: maintaining the ability to support them
20345 served no good purpose. Implements part of proposal 215; closes
20348 o Testing (test-network.sh):
20349 - Stop using "echo -n", as some shells' built-in echo doesn't
20350 support "-n". Instead, use "/bin/echo -n". Partially fixes
20352 - Stop an apparent test-network hang when used with make -j2. Fixes
20354 - Add a --delay option to test-network.sh, which configures the
20355 delay before the chutney network tests for data transmission.
20356 Partially implements ticket 13161.
20359 Changes in version 0.2.5.10 - 2014-10-24
20360 Tor 0.2.5.10 is the first stable release in the 0.2.5 series.
20362 It adds several new security features, including improved
20363 denial-of-service resistance for relays, new compiler hardening
20364 options, and a system-call sandbox for hardened installations on Linux
20365 (requires seccomp2). The controller protocol has several new features,
20366 resolving IPv6 addresses should work better than before, and relays
20367 should be a little more CPU-efficient. We've added support for more
20368 OpenBSD and FreeBSD transparent proxy types. We've improved the build
20369 system and testing infrastructure to allow unit testing of more parts
20370 of the Tor codebase. Finally, we've addressed several nagging pluggable
20371 transport usability issues, and included numerous other small bugfixes
20372 and features mentioned below.
20374 This release marks end-of-life for Tor 0.2.3.x; those Tor versions
20375 have accumulated many known flaws; everyone should upgrade.
20377 o Deprecated versions:
20378 - Tor 0.2.3.x has reached end-of-life; it has received no patches or
20379 attention for some while.
20382 Changes in version 0.2.5.9-rc - 2014-10-20
20383 Tor 0.2.5.9-rc is the third release candidate for the Tor 0.2.5.x
20384 series. It disables SSL3 in response to the recent "POODLE" attack
20385 (even though POODLE does not affect Tor). It also works around a crash
20386 bug caused by some operating systems' response to the "POODLE" attack
20387 (which does affect Tor). It also contains a few miscellaneous fixes.
20389 o Major security fixes:
20390 - Disable support for SSLv3. All versions of OpenSSL in use with Tor
20391 today support TLS 1.0 or later, so we can safely turn off support
20392 for this old (and insecure) protocol. Fixes bug 13426.
20394 o Major bugfixes (openssl bug workaround):
20395 - Avoid crashing when using OpenSSL version 0.9.8zc, 1.0.0o, or
20396 1.0.1j, built with the 'no-ssl3' configuration option. Fixes bug
20397 13471. This is a workaround for an OpenSSL bug.
20400 - Disable the sandbox name resolver cache when running tor-resolve:
20401 tor-resolve doesn't use the sandbox code, and turning it on was
20402 breaking attempts to do tor-resolve on a non-default server on
20403 Linux. Fixes bug 13295; bugfix on 0.2.5.3-alpha.
20405 o Compilation fixes:
20406 - Build and run correctly on systems like OpenBSD-current that have
20407 patched OpenSSL to remove get_cipher_by_char and/or its
20408 implementations. Fixes issue 13325.
20410 o Downgraded warnings:
20411 - Downgrade the severity of the 'unexpected sendme cell from client'
20412 from 'warn' to 'protocol warning'. Closes ticket 8093.
20415 Changes in version 0.2.4.25 - 2014-10-20
20416 Tor 0.2.4.25 disables SSL3 in response to the recent "POODLE" attack
20417 (even though POODLE does not affect Tor). It also works around a crash
20418 bug caused by some operating systems' response to the "POODLE" attack
20419 (which does affect Tor).
20421 o Major security fixes (also in 0.2.5.9-rc):
20422 - Disable support for SSLv3. All versions of OpenSSL in use with Tor
20423 today support TLS 1.0 or later, so we can safely turn off support
20424 for this old (and insecure) protocol. Fixes bug 13426.
20426 o Major bugfixes (openssl bug workaround, also in 0.2.5.9-rc):
20427 - Avoid crashing when using OpenSSL version 0.9.8zc, 1.0.0o, or
20428 1.0.1j, built with the 'no-ssl3' configuration option. Fixes bug
20429 13471. This is a workaround for an OpenSSL bug.
20432 Changes in version 0.2.5.8-rc - 2014-09-22
20433 Tor 0.2.5.8-rc is the second release candidate for the Tor 0.2.5.x
20434 series. It fixes a bug that affects consistency and speed when
20435 connecting to hidden services, and it updates the location of one of
20436 the directory authorities.
20439 - Clients now send the correct address for their chosen rendezvous
20440 point when trying to access a hidden service. They used to send
20441 the wrong address, which would still work some of the time because
20442 they also sent the identity digest of the rendezvous point, and if
20443 the hidden service happened to try connecting to the rendezvous
20444 point from a relay that already had a connection open to it,
20445 the relay would reuse that connection. Now connections to hidden
20446 services should be more robust and faster. Also, this bug meant
20447 that clients were leaking to the hidden service whether they were
20448 on a little-endian (common) or big-endian (rare) system, which for
20449 some users might have reduced their anonymity. Fixes bug 13151;
20450 bugfix on 0.2.1.5-alpha.
20452 o Directory authority changes:
20453 - Change IP address for gabelmoo (v3 directory authority).
20456 Changes in version 0.2.4.24 - 2014-09-22
20457 Tor 0.2.4.24 fixes a bug that affects consistency and speed when
20458 connecting to hidden services, and it updates the location of one of
20459 the directory authorities.
20462 - Clients now send the correct address for their chosen rendezvous
20463 point when trying to access a hidden service. They used to send
20464 the wrong address, which would still work some of the time because
20465 they also sent the identity digest of the rendezvous point, and if
20466 the hidden service happened to try connecting to the rendezvous
20467 point from a relay that already had a connection open to it,
20468 the relay would reuse that connection. Now connections to hidden
20469 services should be more robust and faster. Also, this bug meant
20470 that clients were leaking to the hidden service whether they were
20471 on a little-endian (common) or big-endian (rare) system, which for
20472 some users might have reduced their anonymity. Fixes bug 13151;
20473 bugfix on 0.2.1.5-alpha.
20475 o Directory authority changes:
20476 - Change IP address for gabelmoo (v3 directory authority).
20478 o Minor features (geoip):
20479 - Update geoip and geoip6 to the August 7 2014 Maxmind GeoLite2
20483 Changes in version 0.2.5.7-rc - 2014-09-11
20484 Tor 0.2.5.7-rc fixes several regressions from earlier in the 0.2.5.x
20485 release series, and some long-standing bugs related to ORPort reachability
20486 testing and failure to send CREATE cells. It is the first release
20487 candidate for the Tor 0.2.5.x series.
20489 o Major bugfixes (client, startup):
20490 - Start making circuits as soon as DisabledNetwork is turned off.
20491 When Tor started with DisabledNetwork set, it would correctly
20492 conclude that it shouldn't build circuits, but it would mistakenly
20493 cache this conclusion, and continue believing it even when
20494 DisableNetwork is set to 0. Fixes the bug introduced by the fix
20495 for bug 11200; bugfix on 0.2.5.4-alpha.
20496 - Resume expanding abbreviations for command-line options. The fix
20497 for bug 4647 accidentally removed our hack from bug 586 that
20498 rewrote HashedControlPassword to __HashedControlSessionPassword
20499 when it appears on the commandline (which allowed the user to set
20500 her own HashedControlPassword in the torrc file while the
20501 controller generates a fresh session password for each run). Fixes
20502 bug 12948; bugfix on 0.2.5.1-alpha.
20503 - Warn about attempts to run hidden services and relays in the same
20504 process: that's probably not a good idea. Closes ticket 12908.
20506 o Major bugfixes (relay):
20507 - Avoid queuing or sending destroy cells for circuit ID zero when we
20508 fail to send a CREATE cell. Fixes bug 12848; bugfix on 0.0.8pre1.
20509 Found and fixed by "cypherpunks".
20510 - Fix ORPort reachability detection on relays running behind a
20511 proxy, by correctly updating the "local" mark on the controlling
20512 channel when changing the address of an or_connection_t after the
20513 handshake. Fixes bug 12160; bugfix on 0.2.4.4-alpha.
20515 o Minor features (bridge):
20516 - Add an ExtORPortCookieAuthFileGroupReadable option to make the
20517 cookie file for the ExtORPort g+r by default.
20519 o Minor features (geoip):
20520 - Update geoip and geoip6 to the August 7 2014 Maxmind GeoLite2
20523 o Minor bugfixes (logging):
20524 - Reduce the log severity of the "Pluggable transport proxy does not
20525 provide any needed transports and will not be launched." message,
20526 since Tor Browser includes several ClientTransportPlugin lines in
20527 its torrc-defaults file, leading every Tor Browser user who looks
20528 at her logs to see these notices and wonder if they're dangerous.
20529 Resolves bug 13124; bugfix on 0.2.5.3-alpha.
20530 - Downgrade "Unexpected onionskin length after decryption" warning
20531 to a protocol-warn, since there's nothing relay operators can do
20532 about a client that sends them a malformed create cell. Resolves
20533 bug 12996; bugfix on 0.0.6rc1.
20534 - Log more specific warnings when we get an ESTABLISH_RENDEZVOUS
20535 cell on a cannibalized or non-OR circuit. Resolves ticket 12997.
20536 - When logging information about an EXTEND2 or EXTENDED2 cell, log
20537 their names correctly. Fixes part of bug 12700; bugfix
20539 - When logging information about a relay cell whose command we don't
20540 recognize, log its command as an integer. Fixes part of bug 12700;
20541 bugfix on 0.2.1.10-alpha.
20542 - Escape all strings from the directory connection before logging
20543 them. Fixes bug 13071; bugfix on 0.1.1.15. Patch from "teor".
20545 o Minor bugfixes (controller):
20546 - Restore the functionality of CookieAuthFileGroupReadable. Fixes
20547 bug 12864; bugfix on 0.2.5.1-alpha.
20548 - Actually send TRANSPORT_LAUNCHED and HS_DESC events to
20549 controllers. Fixes bug 13085; bugfix on 0.2.5.1-alpha. Patch
20552 o Minor bugfixes (compilation):
20553 - Fix compilation of test.h with MSVC. Patch from Gisle Vanem;
20554 bugfix on 0.2.5.5-alpha.
20555 - Make the nmake make files work again. Fixes bug 13081. Bugfix on
20556 0.2.5.1-alpha. Patch from "NewEraCracker".
20557 - In routerlist_assert_ok(), don't take the address of a
20558 routerinfo's cache_info member unless that routerinfo is non-NULL.
20559 Fixes bug 13096; bugfix on 0.1.1.9-alpha. Patch by "teor".
20560 - Fix a large number of false positive warnings from the clang
20561 analyzer static analysis tool. This should make real warnings
20562 easier for clang analyzer to find. Patch from "teor". Closes
20565 o Distribution (systemd):
20566 - Verify configuration file via ExecStartPre in the systemd unit
20567 file. Patch from intrigeri; resolves ticket 12730.
20568 - Explicitly disable RunAsDaemon in the systemd unit file. Our
20569 current systemd unit uses "Type = simple", so systemd does not
20570 expect tor to fork. If the user has "RunAsDaemon 1" in their
20571 torrc, then things won't work as expected. This is e.g. the case
20572 on Debian (and derivatives), since there we pass "--defaults-torrc
20573 /usr/share/tor/tor-service-defaults-torrc" (that contains
20574 "RunAsDaemon 1") by default. Patch by intrigeri; resolves
20578 - Adjust the URLs in the README to refer to the new locations of
20579 several documents on the website. Fixes bug 12830. Patch from
20581 - Document 'reject6' and 'accept6' ExitPolicy entries. Resolves
20585 Changes in version 0.2.5.6-alpha - 2014-07-28
20586 Tor 0.2.5.6-alpha brings us a big step closer to slowing down the
20587 risk from guard rotation, and fixes a variety of other issues to get
20588 us closer to a release candidate.
20590 o Major features (also in 0.2.4.23):
20591 - Make the number of entry guards configurable via a new
20592 NumEntryGuards consensus parameter, and the number of directory
20593 guards configurable via a new NumDirectoryGuards consensus
20594 parameter. Implements ticket 12688.
20596 o Major bugfixes (also in 0.2.4.23):
20597 - Fix a bug in the bounds-checking in the 32-bit curve25519-donna
20598 implementation that caused incorrect results on 32-bit
20599 implementations when certain malformed inputs were used along with
20600 a small class of private ntor keys. This bug does not currently
20601 appear to allow an attacker to learn private keys or impersonate a
20602 Tor server, but it could provide a means to distinguish 32-bit Tor
20603 implementations from 64-bit Tor implementations. Fixes bug 12694;
20604 bugfix on 0.2.4.8-alpha. Bug found by Robert Ransom; fix from
20608 - Perform circuit cleanup operations even when circuit
20609 construction operations are disabled (because the network is
20610 disabled, or because there isn't enough directory information).
20611 Previously, when we were not building predictive circuits, we
20612 were not closing expired circuits either. Fixes bug 8387; bugfix on
20613 0.1.1.11-alpha. This bug became visible in 0.2.4.10-alpha when we
20614 became more strict about when we have "enough directory information
20615 to build circuits".
20618 - Authorities now assign the Guard flag to the fastest 25% of the
20619 network (it used to be the fastest 50%). Also raise the consensus
20620 weight that guarantees the Guard flag from 250 to 2000. For the
20621 current network, this results in about 1100 guards, down from 2500.
20622 This step paves the way for moving the number of entry guards
20623 down to 1 (proposal 236) while still providing reasonable expected
20624 performance for most users. Implements ticket 12690.
20625 - Update geoip and geoip6 to the July 10 2014 Maxmind GeoLite2
20627 - Slightly enhance the diagnostic message for bug 12184.
20629 o Minor bugfixes (also in 0.2.4.23):
20630 - Warn and drop the circuit if we receive an inbound 'relay early'
20631 cell. Those used to be normal to receive on hidden service circuits
20632 due to bug 1038, but the buggy Tor versions are long gone from
20633 the network so we can afford to resume watching for them. Resolves
20634 the rest of bug 1038; bugfix on 0.2.1.19.
20635 - Correct a confusing error message when trying to extend a circuit
20636 via the control protocol but we don't know a descriptor or
20637 microdescriptor for one of the specified relays. Fixes bug 12718;
20638 bugfix on 0.2.3.1-alpha.
20641 - Fix compilation when building with bufferevents enabled. (This
20642 configuration is still not expected to work, however.)
20643 Fixes bugs 12438, 12474, 11578; bugfixes on 0.2.5.1-alpha and
20644 0.2.5.3-alpha. Patches from Anthony G. Basile and Sathyanarayanan
20646 - Compile correctly with builds and forks of OpenSSL (such as
20647 LibreSSL) that disable compression. Fixes bug 12602; bugfix on
20648 0.2.1.1-alpha. Patch from "dhill".
20651 Changes in version 0.2.4.23 - 2014-07-28
20652 Tor 0.2.4.23 brings us a big step closer to slowing down the risk from
20653 guard rotation, and also backports several important fixes from the
20654 Tor 0.2.5 alpha release series.
20657 - Clients now look at the "usecreatefast" consensus parameter to
20658 decide whether to use CREATE_FAST or CREATE cells for the first hop
20659 of their circuit. This approach can improve security on connections
20660 where Tor's circuit handshake is stronger than the available TLS
20661 connection security levels, but the tradeoff is more computational
20662 load on guard relays. Implements proposal 221. Resolves ticket 9386.
20663 - Make the number of entry guards configurable via a new
20664 NumEntryGuards consensus parameter, and the number of directory
20665 guards configurable via a new NumDirectoryGuards consensus
20666 parameter. Implements ticket 12688.
20669 - Fix a bug in the bounds-checking in the 32-bit curve25519-donna
20670 implementation that caused incorrect results on 32-bit
20671 implementations when certain malformed inputs were used along with
20672 a small class of private ntor keys. This bug does not currently
20673 appear to allow an attacker to learn private keys or impersonate a
20674 Tor server, but it could provide a means to distinguish 32-bit Tor
20675 implementations from 64-bit Tor implementations. Fixes bug 12694;
20676 bugfix on 0.2.4.8-alpha. Bug found by Robert Ransom; fix from
20680 - Warn and drop the circuit if we receive an inbound 'relay early'
20681 cell. Those used to be normal to receive on hidden service circuits
20682 due to bug 1038, but the buggy Tor versions are long gone from
20683 the network so we can afford to resume watching for them. Resolves
20684 the rest of bug 1038; bugfix on 0.2.1.19.
20685 - Correct a confusing error message when trying to extend a circuit
20686 via the control protocol but we don't know a descriptor or
20687 microdescriptor for one of the specified relays. Fixes bug 12718;
20688 bugfix on 0.2.3.1-alpha.
20689 - Avoid an illegal read from stack when initializing the TLS
20690 module using a version of OpenSSL without all of the ciphers
20691 used by the v2 link handshake. Fixes bug 12227; bugfix on
20692 0.2.4.8-alpha. Found by "starlight".
20695 - Update geoip and geoip6 to the July 10 2014 Maxmind GeoLite2
20699 Changes in version 0.2.5.5-alpha - 2014-06-18
20700 Tor 0.2.5.5-alpha fixes a wide variety of remaining issues in the Tor
20701 0.2.5.x release series, including a couple of DoS issues, some
20702 performance regressions, a large number of bugs affecting the Linux
20703 seccomp2 sandbox code, and various other bugfixes. It also adds
20704 diagnostic bugfixes for a few tricky issues that we're trying to
20707 o Major features (security, traffic analysis resistance):
20708 - Several major improvements to the algorithm used to decide when to
20709 close TLS connections. Previous versions of Tor closed connections
20710 at a fixed interval after the last time a non-padding cell was
20711 sent over the connection, regardless of the target of the
20712 connection. Now, we randomize the intervals by adding up to 50% of
20713 their base value, we measure the length of time since connection
20714 last had at least one circuit, and we allow connections to known
20715 ORs to remain open a little longer (15 minutes instead of 3
20716 minutes minimum). These changes should improve Tor's resistance
20717 against some kinds of traffic analysis, and lower some overhead
20718 from needlessly closed connections. Fixes ticket 6799.
20719 Incidentally fixes ticket 12023; bugfix on 0.2.5.1-alpha.
20721 o Major bugfixes (security, OOM, new since 0.2.5.4-alpha, also in 0.2.4.22):
20722 - Fix a memory leak that could occur if a microdescriptor parse
20723 fails during the tokenizing step. This bug could enable a memory
20724 exhaustion attack by directory servers. Fixes bug 11649; bugfix
20727 o Major bugfixes (security, directory authorities):
20728 - Directory authorities now include a digest of each relay's
20729 identity key as a part of its microdescriptor.
20731 This is a workaround for bug 11743 (reported by "cypherpunks"),
20732 where Tor clients do not support receiving multiple
20733 microdescriptors with the same SHA256 digest in the same
20734 consensus. When clients receive a consensus like this, they only
20735 use one of the relays. Without this fix, a hostile relay could
20736 selectively disable some client use of target relays by
20737 constructing a router descriptor with a different identity and the
20738 same microdescriptor parameters and getting the authorities to
20739 list it in a microdescriptor consensus. This fix prevents an
20740 attacker from causing a microdescriptor collision, because the
20741 router's identity is not forgeable.
20743 o Major bugfixes (relay):
20744 - Use a direct dirport connection when uploading non-anonymous
20745 descriptors to the directory authorities. Previously, relays would
20746 incorrectly use tunnel connections under a fairly wide variety of
20747 circumstances. Fixes bug 11469; bugfix on 0.2.4.3-alpha.
20748 - When a circuit accidentally has the same circuit ID for its
20749 forward and reverse direction, correctly detect the direction of
20750 cells using that circuit. Previously, this bug made roughly one
20751 circuit in a million non-functional. Fixes bug 12195; this is a
20752 bugfix on every version of Tor.
20754 o Major bugfixes (client, pluggable transports):
20755 - When managing pluggable transports, use OS notification facilities
20756 to learn if they have crashed, and don't attempt to kill any
20757 process that has already exited. Fixes bug 8746; bugfix
20760 o Minor features (diagnostic):
20761 - When logging a warning because of bug 7164, additionally check the
20762 hash table for consistency (as proposed on ticket 11737). This may
20763 help diagnose bug 7164.
20764 - When we log a heartbeat, log how many one-hop circuits we have
20765 that are at least 30 minutes old, and log status information about
20766 a few of them. This is an attempt to track down bug 8387.
20767 - When encountering an unexpected CR while writing text to a file on
20768 Windows, log the name of the file. Should help diagnosing
20770 - Give more specific warnings when a client notices that an onion
20771 handshake has failed. Fixes ticket 9635.
20772 - Add significant new logging code to attempt to diagnose bug 12184,
20773 where relays seem to run out of available circuit IDs.
20774 - Improve the diagnostic log message for bug 8387 even further to
20775 try to improve our odds of figuring out why one-hop directory
20776 circuits sometimes do not get closed.
20778 o Minor features (security, memory management):
20779 - Memory allocation tricks (mempools and buffer freelists) are now
20780 disabled by default. You can turn them back on with
20781 --enable-mempools and --enable-buf-freelists respectively. We're
20782 disabling these features because malloc performance is good enough
20783 on most platforms, and a similar feature in OpenSSL exacerbated
20784 exploitation of the Heartbleed attack. Resolves ticket 11476.
20786 o Minor features (security):
20787 - Apply the secure SipHash-2-4 function to the hash table mapping
20788 circuit IDs and channels to circuits. We missed this one when we
20789 were converting all the other hash functions to use SipHash back
20790 in 0.2.5.3-alpha. Resolves ticket 11750.
20792 o Minor features (build):
20793 - The configure script has a --disable-seccomp option to turn off
20794 support for libseccomp on systems that have it, in case it (or
20795 Tor's use of it) is broken. Resolves ticket 11628.
20797 o Minor features (other):
20798 - Update geoip and geoip6 to the June 4 2014 Maxmind GeoLite2
20801 o Minor bugfixes (security, new since 0.2.5.4-alpha, also in 0.2.4.22):
20802 - When running a hidden service, do not allow TunneledDirConns 0;
20803 this will keep the hidden service from running, and also
20804 make it publish its descriptors directly over HTTP. Fixes bug 10849;
20805 bugfix on 0.2.1.1-alpha.
20807 o Minor bugfixes (performance):
20808 - Avoid a bug where every successful connection made us recompute
20809 the flag telling us whether we have sufficient information to
20810 build circuits. Previously, we would forget our cached value
20811 whenever we successfully opened a channel (or marked a router as
20812 running or not running for any other reason), regardless of
20813 whether we had previously believed the router to be running. This
20814 forced us to run an expensive update operation far too often.
20815 Fixes bug 12170; bugfix on 0.1.2.1-alpha.
20816 - Avoid using tor_memeq() for checking relay cell integrity. This
20817 removes a possible performance bottleneck. Fixes part of bug
20818 12169; bugfix on 0.2.1.31.
20820 o Minor bugfixes (compilation):
20821 - Fix compilation of test_status.c when building with MVSC. Bugfix
20822 on 0.2.5.4-alpha. Patch from Gisle Vanem.
20823 - Resolve GCC complaints on OpenBSD about discarding constness in
20824 TO_{ORIGIN,OR}_CIRCUIT functions. Fixes part of bug 11633; bugfix
20825 on 0.1.1.23. Patch from Dana Koch.
20826 - Resolve clang complaints on OpenBSD with -Wshorten-64-to-32 due to
20827 treatment of long and time_t as comparable types. Fixes part of
20828 bug 11633. Patch from Dana Koch.
20829 - Make Tor compile correctly with --disable-buf-freelists. Fixes bug
20830 11623; bugfix on 0.2.5.3-alpha.
20831 - When deciding whether to build the 64-bit curve25519
20832 implementation, detect platforms where we can compile 128-bit
20833 arithmetic but cannot link it. Fixes bug 11729; bugfix on
20834 0.2.4.8-alpha. Patch from "conradev".
20835 - Fix compilation when DNS_CACHE_DEBUG is enabled. Fixes bug 11761;
20836 bugfix on 0.2.3.13-alpha. Found by "cypherpunks".
20837 - Fix compilation with dmalloc. Fixes bug 11605; bugfix
20840 o Minor bugfixes (Directory server):
20841 - When sending a compressed set of descriptors or microdescriptors,
20842 make sure to finalize the zlib stream. Previously, we would write
20843 all the compressed data, but if the last descriptor we wanted to
20844 send was missing or too old, we would not mark the stream as
20845 finished. This caused problems for decompression tools. Fixes bug
20846 11648; bugfix on 0.1.1.23.
20848 o Minor bugfixes (Linux seccomp sandbox):
20849 - Make the seccomp sandbox code compile under ARM Linux. Fixes bug
20850 11622; bugfix on 0.2.5.1-alpha.
20851 - Avoid crashing when re-opening listener ports with the seccomp
20852 sandbox active. Fixes bug 12115; bugfix on 0.2.5.1-alpha.
20853 - Avoid crashing with the seccomp sandbox enabled along with
20854 ConstrainedSockets. Fixes bug 12139; bugfix on 0.2.5.1-alpha.
20855 - When we receive a SIGHUP with the sandbox enabled, correctly
20856 support rotating our log files. Fixes bug 12032; bugfix
20858 - Avoid crash when running with sandboxing enabled and
20859 DirReqStatistics not disabled. Fixes bug 12035; bugfix
20861 - Fix a "BUG" warning when trying to write bridge-stats files with
20862 the Linux syscall sandbox filter enabled. Fixes bug 12041; bugfix
20864 - Prevent the sandbox from crashing on startup when run with the
20865 --enable-expensive-hardening configuration option. Fixes bug
20866 11477; bugfix on 0.2.5.4-alpha.
20867 - When running with DirPortFrontPage and sandboxing both enabled,
20868 reload the DirPortFrontPage correctly when restarting. Fixes bug
20869 12028; bugfix on 0.2.5.1-alpha.
20870 - Don't try to enable the sandbox when using the Tor binary to check
20871 its configuration, hash a passphrase, or so on. Doing so was
20872 crashing on startup for some users. Fixes bug 11609; bugfix
20874 - Avoid warnings when running with sandboxing and node statistics
20875 enabled at the same time. Fixes part of 12064; bugfix on
20876 0.2.5.1-alpha. Patch from Michael Wolf.
20877 - Avoid warnings when running with sandboxing enabled at the same
20878 time as cookie authentication, hidden services, or directory
20879 authority voting. Fixes part of 12064; bugfix on 0.2.5.1-alpha.
20880 - Do not allow options that require calls to exec to be enabled
20881 alongside the seccomp2 sandbox: they will inevitably crash. Fixes
20882 bug 12043; bugfix on 0.2.5.1-alpha.
20883 - Handle failures in getpwnam()/getpwuid() when running with the
20884 User option set and the Linux syscall sandbox enabled. Fixes bug
20885 11946; bugfix on 0.2.5.1-alpha.
20886 - Refactor the getaddrinfo workaround that the seccomp sandbox uses
20887 to avoid calling getaddrinfo() after installing the sandbox
20888 filters. Previously, it preloaded a cache with the IPv4 address
20889 for our hostname, and nothing else. Now, it loads the cache with
20890 every address that it used to initialize the Tor process. Fixes
20891 bug 11970; bugfix on 0.2.5.1-alpha.
20893 o Minor bugfixes (pluggable transports):
20894 - Enable the ExtORPortCookieAuthFile option, to allow changing the
20895 default location of the authentication token for the extended OR
20896 Port as used by sever-side pluggable transports. We had
20897 implemented this option before, but the code to make it settable
20898 had been omitted. Fixes bug 11635; bugfix on 0.2.5.1-alpha.
20899 - Avoid another 60-second delay when starting Tor in a pluggable-
20900 transport-using configuration when we already have cached
20901 descriptors for our bridges. Fixes bug 11965; bugfix
20904 o Minor bugfixes (client):
20905 - Avoid "Tried to open a socket with DisableNetwork set" warnings
20906 when starting a client with bridges configured and DisableNetwork
20907 set. (Tor launcher starts Tor with DisableNetwork set the first
20908 time it runs.) Fixes bug 10405; bugfix on 0.2.3.9-alpha.
20910 o Minor bugfixes (testing):
20911 - The Python parts of the test scripts now work on Python 3 as well
20912 as Python 2, so systems where '/usr/bin/python' is Python 3 will
20913 no longer have the tests break. Fixes bug 11608; bugfix
20915 - When looking for versions of python that we could run the tests
20916 with, check for "python2.7" and "python3.3"; previously we were
20917 only looking for "python", "python2", and "python3". Patch from
20918 Dana Koch. Fixes bug 11632; bugfix on 0.2.5.2-alpha.
20919 - Fix all valgrind warnings produced by the unit tests. There were
20920 over a thousand memory leak warnings previously, mostly produced
20921 by forgetting to free things in the unit test code. Fixes bug
20922 11618, bugfixes on many versions of Tor.
20924 o Minor bugfixes (tor-fw-helper):
20925 - Give a correct log message when tor-fw-helper fails to launch.
20926 (Previously, we would say something like "tor-fw-helper sent us a
20927 string we could not parse".) Fixes bug 9781; bugfix
20930 o Minor bugfixes (relay, threading):
20931 - Check return code on spawn_func() in cpuworker code, so that we
20932 don't think we've spawned a nonworking cpuworker and write junk to
20933 it forever. Fix related to bug 4345; bugfix on all released Tor
20934 versions. Found by "skruffy".
20935 - Use a pthread_attr to make sure that spawn_func() cannot return an
20936 error while at the same time launching a thread. Fix related to
20937 bug 4345; bugfix on all released Tor versions. Reported
20940 o Minor bugfixes (relay, oom prevention):
20941 - Correctly detect the total available system memory. We tried to do
20942 this in 0.2.5.4-alpha, but the code was set up to always return an
20943 error value, even on success. Fixes bug 11805; bugfix
20946 o Minor bugfixes (relay, other):
20947 - We now drop CREATE cells for already-existent circuit IDs and for
20948 zero-valued circuit IDs, regardless of other factors that might
20949 otherwise have called for DESTROY cells. Fixes bug 12191; bugfix
20951 - Avoid an illegal read from stack when initializing the TLS module
20952 using a version of OpenSSL without all of the ciphers used by the
20953 v2 link handshake. Fixes bug 12227; bugfix on 0.2.4.8-alpha. Found
20955 - When rejecting DATA cells for stream_id zero, still count them
20956 against the circuit's deliver window so that we don't fail to send
20957 a SENDME. Fixes bug 11246; bugfix on 0.2.4.10-alpha.
20959 o Minor bugfixes (logging):
20960 - Fix a misformatted log message about delayed directory fetches.
20961 Fixes bug 11654; bugfix on 0.2.5.3-alpha.
20962 - Squelch a spurious LD_BUG message "No origin circuit for
20963 successful SOCKS stream" in certain hidden service failure cases;
20967 - Include a tor.service file in contrib/dist for use with systemd.
20968 Some distributions will be able to use this file unmodified;
20969 others will need to tweak it, or write their own. Patch from Jamie
20970 Nguyen; resolves ticket 8368.
20973 - Clean up several option names in the manpage to match their real
20974 names, add the missing documentation for a couple of testing and
20975 directory authority options, remove the documentation for a
20976 V2-directory fetching option that no longer exists. Resolves
20978 - Correct the documentation so that it lists the correct directory
20979 for the stats files. (They are in a subdirectory called "stats",
20981 - In the manpage, move more authority-only options into the
20982 directory authority section so that operators of regular directory
20983 caches don't get confused.
20986 - The contrib directory has been sorted and tidied. Before, it was
20987 an unsorted dumping ground for useful and not-so-useful things.
20988 Now, it is divided based on functionality, and the items which
20989 seemed to be nonfunctional or useless have been removed. Resolves
20990 ticket 8966; based on patches from "rl1987".
20993 - Remove /tor/dbg-stability.txt URL that was meant to help debug WFU
20994 and MTBF calculations, but that nobody was using. Fixes ticket 11742.
20995 - The TunnelDirConns and PreferTunnelledDirConns options no longer
20996 exist; tunneled directory connections have been available since
20997 0.1.2.5-alpha, and turning them off is not a good idea. This is a
20998 brute-force fix for 10849, where "TunnelDirConns 0" would break
21002 Changes in version 0.2.4.22 - 2014-05-16
21003 Tor 0.2.4.22 backports numerous high-priority fixes from the Tor 0.2.5
21004 alpha release series. These include blocking all authority signing
21005 keys that may have been affected by the OpenSSL "heartbleed" bug,
21006 choosing a far more secure set of TLS ciphersuites by default, closing
21007 a couple of memory leaks that could be used to run a target relay out
21008 of RAM, and several others.
21010 o Major features (security, backport from 0.2.5.4-alpha):
21011 - Block authority signing keys that were used on authorities
21012 vulnerable to the "heartbleed" bug in OpenSSL (CVE-2014-0160). (We
21013 don't have any evidence that these keys _were_ compromised; we're
21014 doing this to be prudent.) Resolves ticket 11464.
21016 o Major bugfixes (security, OOM):
21017 - Fix a memory leak that could occur if a microdescriptor parse
21018 fails during the tokenizing step. This bug could enable a memory
21019 exhaustion attack by directory servers. Fixes bug 11649; bugfix
21022 o Major bugfixes (TLS cipher selection, backport from 0.2.5.4-alpha):
21023 - The relay ciphersuite list is now generated automatically based on
21024 uniform criteria, and includes all OpenSSL ciphersuites with
21025 acceptable strength and forward secrecy. Previously, we had left
21026 some perfectly fine ciphersuites unsupported due to omission or
21027 typo. Resolves bugs 11513, 11492, 11498, 11499. Bugs reported by
21028 'cypherpunks'. Bugfix on 0.2.4.8-alpha.
21029 - Relays now trust themselves to have a better view than clients of
21030 which TLS ciphersuites are better than others. (Thanks to bug
21031 11513, the relay list is now well-considered, whereas the client
21032 list has been chosen mainly for anti-fingerprinting purposes.)
21033 Relays prefer: AES over 3DES; then ECDHE over DHE; then GCM over
21034 CBC; then SHA384 over SHA256 over SHA1; and last, AES256 over
21035 AES128. Resolves ticket 11528.
21036 - Clients now try to advertise the same list of ciphersuites as
21037 Firefox 28. This change enables selection of (fast) GCM
21038 ciphersuites, disables some strange old ciphers, and stops
21039 advertising the ECDH (not to be confused with ECDHE) ciphersuites.
21040 Resolves ticket 11438.
21042 o Minor bugfixes (configuration, security):
21043 - When running a hidden service, do not allow TunneledDirConns 0:
21044 trying to set that option together with a hidden service would
21045 otherwise prevent the hidden service from running, and also make
21046 it publish its descriptors directly over HTTP. Fixes bug 10849;
21047 bugfix on 0.2.1.1-alpha.
21049 o Minor bugfixes (controller, backport from 0.2.5.4-alpha):
21050 - Avoid sending a garbage value to the controller when a circuit is
21051 cannibalized. Fixes bug 11519; bugfix on 0.2.3.11-alpha.
21053 o Minor bugfixes (exit relay, backport from 0.2.5.4-alpha):
21054 - Stop leaking memory when we successfully resolve a PTR record.
21055 Fixes bug 11437; bugfix on 0.2.4.7-alpha.
21057 o Minor bugfixes (bridge client, backport from 0.2.5.4-alpha):
21058 - Avoid 60-second delays in the bootstrapping process when Tor is
21059 launching for a second time while using bridges. Fixes bug 9229;
21060 bugfix on 0.2.0.3-alpha.
21062 o Minor bugfixes (relays and bridges, backport from 0.2.5.4-alpha):
21063 - Give the correct URL in the warning message when trying to run a
21064 relay on an ancient version of Windows. Fixes bug 9393.
21066 o Minor bugfixes (compilation):
21067 - Fix a compilation error when compiling with --disable-curve25519.
21068 Fixes bug 9700; bugfix on 0.2.4.17-rc.
21071 - Downgrade the warning severity for the the "md was still
21072 referenced 1 node(s)" warning. Tor 0.2.5.4-alpha has better code
21073 for trying to diagnose this bug, and the current warning in
21074 earlier versions of tor achieves nothing useful. Addresses warning
21077 o Minor features (log verbosity, backport from 0.2.5.4-alpha):
21078 - When we run out of usable circuit IDs on a channel, log only one
21079 warning for the whole channel, and describe how many circuits
21080 there were on the channel. Fixes part of ticket 11553.
21082 o Minor features (security, backport from 0.2.5.4-alpha):
21083 - Decrease the lower limit of MaxMemInCellQueues to 256 MBytes (but
21084 leave the default at 8GBytes), to better support Raspberry Pi
21085 users. Fixes bug 9686; bugfix on 0.2.4.14-alpha.
21087 o Documentation (backport from 0.2.5.4-alpha):
21088 - Correctly document that we search for a system torrc file before
21089 looking in ~/.torrc. Fixes documentation side of 9213; bugfix on
21093 Changes in version 0.2.5.4-alpha - 2014-04-25
21094 Tor 0.2.5.4-alpha includes several security and performance
21095 improvements for clients and relays, including blacklisting authority
21096 signing keys that were used while susceptible to the OpenSSL
21097 "heartbleed" bug, fixing two expensive functions on busy relays,
21098 improved TLS ciphersuite preference lists, support for run-time
21099 hardening on compilers that support AddressSanitizer, and more work on
21100 the Linux sandbox code.
21102 There are also several usability fixes for clients (especially clients
21103 that use bridges), two new TransPort protocols supported (one on
21104 OpenBSD, one on FreeBSD), and various other bugfixes.
21106 This release marks end-of-life for Tor 0.2.2.x; those Tor versions
21107 have accumulated many known flaws; everyone should upgrade.
21109 o Major features (security):
21110 - If you don't specify MaxMemInQueues yourself, Tor now tries to
21111 pick a good value based on your total system memory. Previously,
21112 the default was always 8 GB. You can still override the default by
21113 setting MaxMemInQueues yourself. Resolves ticket 11396.
21114 - Block authority signing keys that were used on authorities
21115 vulnerable to the "heartbleed" bug in OpenSSL (CVE-2014-0160). (We
21116 don't have any evidence that these keys _were_ compromised; we're
21117 doing this to be prudent.) Resolves ticket 11464.
21119 o Major features (relay performance):
21120 - Speed up server-side lookups of rendezvous and introduction point
21121 circuits by using hashtables instead of linear searches. These
21122 functions previously accounted between 3 and 7% of CPU usage on
21123 some busy relays. Resolves ticket 9841.
21124 - Avoid wasting CPU when extending a circuit over a channel that is
21125 nearly out of circuit IDs. Previously, we would do a linear scan
21126 over possible circuit IDs before finding one or deciding that we
21127 had exhausted our possibilities. Now, we try at most 64 random
21128 circuit IDs before deciding that we probably won't succeed. Fixes
21129 a possible root cause of ticket 11553.
21131 o Major features (seccomp2 sandbox, Linux only):
21132 - The seccomp2 sandbox can now run a test network for multiple hours
21133 without crashing. The sandbox is still experimental, and more bugs
21134 will probably turn up. To try it, enable "Sandbox 1" on a Linux
21135 host. Resolves ticket 11351.
21136 - Strengthen sandbox code: the sandbox can now test the arguments
21137 for rename(), and blocks _sysctl() entirely. Resolves another part
21139 - When the sandbox blocks a system call, it now tries to log a stack
21140 trace before exiting. Resolves ticket 11465.
21142 o Major bugfixes (TLS cipher selection):
21143 - The relay ciphersuite list is now generated automatically based on
21144 uniform criteria, and includes all OpenSSL ciphersuites with
21145 acceptable strength and forward secrecy. Previously, we had left
21146 some perfectly fine ciphersuites unsupported due to omission or
21147 typo. Resolves bugs 11513, 11492, 11498, 11499. Bugs reported by
21148 'cypherpunks'. Bugfix on 0.2.4.8-alpha.
21149 - Relays now trust themselves to have a better view than clients of
21150 which TLS ciphersuites are better than others. (Thanks to bug
21151 11513, the relay list is now well-considered, whereas the client
21152 list has been chosen mainly for anti-fingerprinting purposes.)
21153 Relays prefer: AES over 3DES; then ECDHE over DHE; then GCM over
21154 CBC; then SHA384 over SHA256 over SHA1; and last, AES256 over
21155 AES128. Resolves ticket 11528.
21156 - Clients now try to advertise the same list of ciphersuites as
21157 Firefox 28. This change enables selection of (fast) GCM
21158 ciphersuites, disables some strange old ciphers, and stops
21159 advertising the ECDH (not to be confused with ECDHE) ciphersuites.
21160 Resolves ticket 11438.
21162 o Major bugfixes (bridge client):
21163 - Avoid 60-second delays in the bootstrapping process when Tor is
21164 launching for a second time while using bridges. Fixes bug 9229;
21165 bugfix on 0.2.0.3-alpha.
21167 o Minor features (transparent proxy, *BSD):
21168 - Support FreeBSD's ipfw firewall interface for TransPort ports on
21169 FreeBSD. To enable it, set "TransProxyType ipfw". Resolves ticket
21170 10267; patch from "yurivict".
21171 - Support OpenBSD's divert-to rules with the pf firewall for
21172 transparent proxy ports. To enable it, set "TransProxyType
21173 pf-divert". This allows Tor to run a TransPort transparent proxy
21174 port on OpenBSD 4.4 or later without root privileges. See the
21175 pf.conf(5) manual page for information on configuring pf to use
21176 divert-to rules. Closes ticket 10896; patch from Dana Koch.
21178 o Minor features (security):
21179 - New --enable-expensive-hardening option to enable security
21180 hardening options that consume nontrivial amounts of CPU and
21181 memory. Right now, this includes AddressSanitizer and UbSan, which
21182 are supported in newer versions of GCC and Clang. Closes ticket
21185 o Minor features (log verbosity):
21186 - Demote the message that we give when a flushing connection times
21187 out for too long from NOTICE to INFO. It was usually meaningless.
21188 Resolves ticket 5286.
21189 - Don't log so many notice-level bootstrapping messages at startup
21190 about downloading descriptors. Previously, we'd log a notice
21191 whenever we learned about more routers. Now, we only log a notice
21192 at every 5% of progress. Fixes bug 9963.
21193 - Warn less verbosely when receiving a malformed
21194 ESTABLISH_RENDEZVOUS cell. Fixes ticket 11279.
21195 - When we run out of usable circuit IDs on a channel, log only one
21196 warning for the whole channel, and describe how many circuits
21197 there were on the channel. Fixes part of ticket 11553.
21199 o Minor features (relay):
21200 - If a circuit timed out for at least 3 minutes, check if we have a
21201 new external IP address, and publish a new descriptor with the new
21202 IP address if it changed. Resolves ticket 2454.
21204 o Minor features (controller):
21205 - Make the entire exit policy available from the control port via
21206 GETINFO exit-policy/*. Implements enhancement 7952. Patch from
21208 - Because of the fix for ticket 11396, the real limit for memory
21209 usage may no longer match the configured MaxMemInQueues value. The
21210 real limit is now exposed via GETINFO limits/max-mem-in-queues.
21212 o Minor features (bridge client):
21213 - Report a more useful failure message when we can't connect to a
21214 bridge because we don't have the right pluggable transport
21215 configured. Resolves ticket 9665. Patch from Fábio J. Bertinatto.
21217 o Minor features (diagnostic):
21218 - Add more log messages to diagnose bug 7164, which causes
21219 intermittent "microdesc_free() called but md was still referenced"
21220 warnings. We now include more information, to figure out why we
21221 might be cleaning a microdescriptor for being too old if it's
21222 still referenced by a live node_t object.
21224 o Minor bugfixes (client, DNSPort):
21225 - When using DNSPort, try to respond to AAAA requests with AAAA
21226 answers. Previously, we hadn't looked at the request type when
21227 deciding which answer type to prefer. Fixes bug 10468; bugfix on
21229 - When receiving a DNS query for an unsupported record type, reply
21230 with no answer rather than with a NOTIMPL error. This behavior
21231 isn't correct either, but it will break fewer client programs, we
21232 hope. Fixes bug 10268; bugfix on 0.2.0.1-alpha. Original patch
21235 o Minor bugfixes (exit relay):
21236 - Stop leaking memory when we successfully resolve a PTR record.
21237 Fixes bug 11437; bugfix on 0.2.4.7-alpha.
21239 o Minor bugfixes (bridge client):
21240 - Stop accepting bridge lines containing hostnames. Doing so would
21241 cause clients to perform DNS requests on the hostnames, which was
21242 not sensible behavior. Fixes bug 10801; bugfix on 0.2.0.1-alpha.
21243 - Avoid a 60-second delay in the bootstrapping process when a Tor
21244 client with pluggable transports re-reads its configuration at
21245 just the wrong time. Re-fixes bug 11156; bugfix on 0.2.5.3-alpha.
21247 o Minor bugfixes (client, logging during bootstrap):
21248 - Warn only once if we start logging in an unsafe way. Previously,
21249 we complain as many times as we had problems. Fixes bug 9870;
21250 bugfix on 0.2.5.1-alpha.
21251 - Only report the first fatal bootstrap error on a given OR
21252 connection. This stops us from telling the controller bogus error
21253 messages like "DONE". Fixes bug 10431; bugfix on 0.2.1.1-alpha.
21254 - Be more helpful when trying to run sandboxed on Linux without
21255 libseccomp. Instead of saying "Sandbox is not implemented on this
21256 platform", we now explain that we need to be built with
21257 libseccomp. Fixes bug 11543; bugfix on 0.2.5.1-alpha.
21258 - Avoid generating spurious warnings when starting with
21259 DisableNetwork enabled. Fixes bug 11200 and bug 10405; bugfix on
21262 o Minor bugfixes (closing OR connections):
21263 - If write_to_buf() in connection_write_to_buf_impl_() ever fails,
21264 check if it's an or_connection_t and correctly call
21265 connection_or_close_for_error() rather than
21266 connection_mark_for_close() directly. Fixes bug 11304; bugfix on
21268 - When closing all connections on setting DisableNetwork to 1, use
21269 connection_or_close_normally() rather than closing OR connections
21270 out from under the channel layer. Fixes bug 11306; bugfix on
21273 o Minor bugfixes (controller):
21274 - Avoid sending a garbage value to the controller when a circuit is
21275 cannibalized. Fixes bug 11519; bugfix on 0.2.3.11-alpha.
21277 o Minor bugfixes (tor-fw-helper):
21278 - Allow tor-fw-helper to build again by adding src/ext to its
21279 CPPFLAGS. Fixes bug 11296; bugfix on 0.2.5.3-alpha.
21281 o Minor bugfixes (bridges):
21282 - Avoid potential crashes or bad behavior when launching a
21283 server-side managed proxy with ORPort or ExtORPort temporarily
21284 disabled. Fixes bug 9650; bugfix on 0.2.3.16-alpha.
21286 o Minor bugfixes (platform-specific):
21287 - Fix compilation on Solaris, which does not have <endian.h>. Fixes
21288 bug 11426; bugfix on 0.2.5.3-alpha.
21289 - When dumping a malformed directory object to disk, save it in
21290 binary mode on Windows, not text mode. Fixes bug 11342; bugfix on
21292 - Don't report failures from make_socket_reuseable() on incoming
21293 sockets on OSX: this can happen when incoming connections close
21294 early. Fixes bug 10081.
21296 o Minor bugfixes (trivial memory leaks):
21297 - Fix a small memory leak when signing a directory object. Fixes bug
21298 11275; bugfix on 0.2.4.13-alpha.
21299 - Free placeholder entries in our circuit table at exit; fixes a
21300 harmless memory leak. Fixes bug 11278; bugfix on 0.2.5.1-alpha.
21301 - Don't re-initialize a second set of OpenSSL mutexes when starting
21302 up. Previously, we'd make one set of mutexes, and then immediately
21303 replace them with another. Fixes bug 11726; bugfix on
21305 - Resolve some memory leaks found by coverity in the unit tests, on
21306 exit in tor-gencert, and on a failure to compute digests for our
21307 own keys when generating a v3 networkstatus vote. These leaks
21308 should never have affected anyone in practice.
21310 o Minor bugfixes (hidden service):
21311 - Only retry attempts to connect to a chosen rendezvous point 8
21312 times, not 30. Fixes bug 4241; bugfix on 0.1.0.1-rc.
21314 o Minor bugfixes (misc code correctness):
21315 - Fix various instances of undefined behavior in channeltls.c,
21316 tor_memmem(), and eventdns.c that would cause us to construct
21317 pointers to memory outside an allocated object. (These invalid
21318 pointers were not accessed, but C does not even allow them to
21319 exist.) Fixes bug 10363; bugfixes on 0.1.1.1-alpha, 0.1.2.1-alpha,
21320 0.2.0.10-alpha, and 0.2.3.6-alpha. Reported by "bobnomnom".
21321 - Use the AddressSanitizer and Ubsan sanitizers (in clang-3.4) to
21322 fix some miscellaneous errors in our tests and codebase. Fixes bug
21323 11232. Bugfixes on versions back as far as 0.2.1.11-alpha.
21324 - Always check return values for unlink, munmap, UnmapViewOfFile;
21325 check strftime return values more often. In some cases all we can
21326 do is report a warning, but this may help prevent deeper bugs from
21327 going unnoticed. Closes ticket 8787; bugfixes on many, many tor
21329 - Fix numerous warnings from the clang "scan-build" static analyzer.
21330 Some of these are programming style issues; some of them are false
21331 positives that indicated awkward code; some are undefined behavior
21332 cases related to constructing (but not using) invalid pointers;
21333 some are assumptions about API behavior; some are (harmlessly)
21334 logging sizeof(ptr) bytes from a token when sizeof(*ptr) would be
21335 correct; and one or two are genuine bugs that weren't reachable
21336 from the rest of the program. Fixes bug 8793; bugfixes on many,
21340 - Build the torify.1 manpage again. Previously, we were only trying
21341 to build it when also building tor-fw-helper. That's why we didn't
21342 notice that we'd broken the ability to build it. Fixes bug 11321;
21343 bugfix on 0.2.5.1-alpha.
21344 - Fix the layout of the SOCKSPort flags in the manpage. Fixes bug
21345 11061; bugfix on 0.2.4.7-alpha.
21346 - Correctly document that we search for a system torrc file before
21347 looking in ~/.torrc. Fixes documentation side of 9213; bugfix on
21349 - Resolve warnings from Doxygen.
21351 o Code simplifications and refactoring:
21352 - Remove is_internal_IP() function. Resolves ticket 4645.
21353 - Remove unused function circuit_dump_by_chan from circuitlist.c.
21354 Closes issue 9107; patch from "marek".
21355 - Change our use of the ENUM_BF macro to avoid declarations that
21358 o Deprecated versions:
21359 - Tor 0.2.2.x has reached end-of-life; it has received no patches or
21360 attention for some while. Directory authorities no longer accept
21361 descriptors from relays running any version of Tor prior to Tor
21362 0.2.3.16-alpha. Resolves ticket 11149.
21365 - New macros in test.h to simplify writing mock-functions for unit
21366 tests. Part of ticket 11507. Patch from Dana Koch.
21367 - Complete tests for the status.c module. Resolves ticket 11507.
21368 Patch from Dana Koch.
21371 - Remove all code for the long unused v1 directory protocol.
21372 Resolves ticket 11070.
21375 Changes in version 0.2.5.3-alpha - 2014-03-22
21376 Tor 0.2.5.3-alpha includes all the fixes from 0.2.4.21. It contains
21377 two new anti-DoS features for Tor relays, resolves a bug that kept
21378 SOCKS5 support for IPv6 from working, fixes several annoying usability
21379 issues for bridge users, and removes more old code for unused
21382 The Tor 0.2.5.x release series is now in patch-freeze: no feature
21383 patches not already written will be considered for inclusion in 0.2.5.x.
21385 o Major features (relay security, DoS-resistance):
21386 - When deciding whether we have run out of memory and we need to
21387 close circuits, also consider memory allocated in buffers for
21388 streams attached to each circuit.
21390 This change, which extends an anti-DoS feature introduced in
21391 0.2.4.13-alpha and improved in 0.2.4.14-alpha, lets Tor exit relays
21392 better resist more memory-based DoS attacks than before. Since the
21393 MaxMemInCellQueues option now applies to all queues, it is renamed
21394 to MaxMemInQueues. This feature fixes bug 10169.
21395 - Avoid hash-flooding denial-of-service attacks by using the secure
21396 SipHash-2-4 hash function for our hashtables. Without this
21397 feature, an attacker could degrade performance of a targeted
21398 client or server by flooding their data structures with a large
21399 number of entries to be stored at the same hash table position,
21400 thereby slowing down the Tor instance. With this feature, hash
21401 table positions are derived from a randomized cryptographic key,
21402 and an attacker cannot predict which entries will collide. Closes
21404 - Decrease the lower limit of MaxMemInQueues to 256 MBytes (but leave
21405 the default at 8GBytes), to better support Raspberry Pi users. Fixes
21406 bug 9686; bugfix on 0.2.4.14-alpha.
21408 o Minor features (bridges, pluggable transports):
21409 - Bridges now write the SHA1 digest of their identity key
21410 fingerprint (that is, a hash of a hash of their public key) to
21411 notice-level logs, and to a new hashed-fingerprint file. This
21412 information will help bridge operators look up their bridge in
21413 Globe and similar tools. Resolves ticket 10884.
21414 - Improve the message that Tor displays when running as a bridge
21415 using pluggable transports without an Extended ORPort listener.
21416 Also, log the message in the log file too. Resolves ticket 11043.
21418 o Minor features (other):
21419 - Add a new option, PredictedPortsRelevanceTime, to control how long
21420 after having received a request to connect to a given port Tor
21421 will try to keep circuits ready in anticipation of future requests
21422 for that port. Patch from "unixninja92"; implements ticket 9176.
21423 - Generate a warning if any ports are listed in the SocksPolicy,
21424 DirPolicy, AuthDirReject, AuthDirInvalid, AuthDirBadDir, or
21425 AuthDirBadExit options. (These options only support address
21426 ranges.) Fixes part of ticket 11108.
21427 - Update geoip and geoip6 to the February 7 2014 Maxmind GeoLite2
21430 o Minor bugfixes (new since 0.2.5.2-alpha, also in 0.2.4.21):
21431 - Build without warnings under clang 3.4. (We have some macros that
21432 define static functions only some of which will get used later in
21433 the module. Starting with clang 3.4, these give a warning unless the
21434 unused attribute is set on them.) Resolves ticket 10904.
21435 - Fix build warnings about missing "a2x" comment when building the
21436 manpages from scratch on OpenBSD; OpenBSD calls it "a2x.py".
21437 Fixes bug 10929; bugfix on 0.2.2.9-alpha. Patch from Dana Koch.
21439 o Minor bugfixes (client):
21440 - Improve the log message when we can't connect to a hidden service
21441 because all of the hidden service directory nodes hosting its
21442 descriptor are excluded. Improves on our fix for bug 10722, which
21443 was a bugfix on 0.2.0.10-alpha.
21444 - Raise a control port warning when we fail to connect to all of
21445 our bridges. Previously, we didn't inform the controller, and
21446 the bootstrap process would stall. Fixes bug 11069; bugfix on
21448 - Exit immediately when a process-owning controller exits.
21449 Previously, tor relays would wait for a little while after their
21450 controller exited, as if they had gotten an INT signal -- but this
21451 was problematic, since there was no feedback for the user. To do a
21452 clean shutdown, controllers should send an INT signal and give Tor
21453 a chance to clean up. Fixes bug 10449; bugfix on 0.2.2.28-beta.
21454 - Stop attempting to connect to bridges before our pluggable
21455 transports are configured (harmless but resulted in some erroneous
21456 log messages). Fixes bug 11156; bugfix on 0.2.3.2-alpha.
21457 - Fix connections to IPv6 addresses over SOCKS5. Previously, we were
21458 generating incorrect SOCKS5 responses, and confusing client
21459 applications. Fixes bug 10987; bugfix on 0.2.4.7-alpha.
21461 o Minor bugfixes (relays and bridges):
21462 - Avoid crashing on a malformed resolv.conf file when running a
21463 relay using Libevent 1. Fixes bug 8788; bugfix on 0.1.1.23.
21464 - Non-exit relays no longer launch mock DNS requests to check for
21465 DNS hijacking. This has been unnecessary since 0.2.1.7-alpha, when
21466 non-exit relays stopped servicing DNS requests. Fixes bug 965;
21467 bugfix on 0.2.1.7-alpha. Patch from Matt Pagan.
21468 - Bridges now report complete directory request statistics. Related
21469 to bug 5824; bugfix on 0.2.2.1-alpha.
21470 - Bridges now never collect statistics that were designed for
21471 relays. Fixes bug 5824; bugfix on 0.2.3.8-alpha.
21472 - Stop giving annoying warning messages when we decide not to launch
21473 a pluggable transport proxy that we don't need (because there are
21474 no bridges configured to use it). Resolves ticket 5018; bugfix
21476 - Give the correct URL in the warning message when trying to run a
21477 relay on an ancient version of Windows. Fixes bug 9393.
21479 o Minor bugfixes (backtrace support):
21480 - Support automatic backtraces on more platforms by using the
21481 "-fasynchronous-unwind-tables" compiler option. This option is
21482 needed for platforms like 32-bit Intel where "-fomit-frame-pointer"
21483 is on by default and table generation is not. This doesn't yet
21484 add Windows support; only Linux, OSX, and some BSDs are affected.
21485 Reported by 'cypherpunks'; fixes bug 11047; bugfix on 0.2.5.2-alpha.
21486 - Avoid strange behavior if two threads hit failed assertions at the
21487 same time and both try to log backtraces at once. (Previously, if
21488 this had happened, both threads would have stored their intermediate
21489 results in the same buffer, and generated junk outputs.) Reported by
21490 "cypherpunks". Fixes bug 11048; bugfix on 0.2.5.2-alpha.
21491 - Fix a compiler warning in format_number_sigsafe(). Bugfix on
21492 0.2.5.2-alpha; patch from Nick Hopper.
21494 o Minor bugfixes (unit tests):
21495 - Fix a small bug in the unit tests that might have made the tests
21496 call 'chmod' with an uninitialized bitmask. Fixes bug 10928;
21497 bugfix on 0.2.5.1-alpha. Patch from Dana Koch.
21500 - Remove all remaining code related to version-0 hidden service
21501 descriptors: they have not been in use since 0.2.2.1-alpha. Fixes
21502 the rest of bug 10841.
21505 - Document in the manpage that "KBytes" may also be written as
21506 "kilobytes" or "KB", that "Kbits" may also be written as
21507 "kilobits", and so forth. Closes ticket 9222.
21508 - Document that the ClientOnly config option overrides ORPort.
21509 Our old explanation made ClientOnly sound as though it did
21510 nothing at all. Resolves bug 9059.
21511 - Explain that SocksPolicy, DirPolicy, and similar options don't
21512 take port arguments. Fixes the other part of ticket 11108.
21513 - Fix a comment about the rend_server_descriptor_t.protocols field
21514 to more accurately describe its range. Also, make that field
21515 unsigned, to more accurately reflect its usage. Fixes bug 9099;
21516 bugfix on 0.2.1.5-alpha.
21517 - Fix the manpage's description of HiddenServiceAuthorizeClient:
21518 the maximum client name length is 16, not 19. Fixes bug 11118;
21519 bugfix on 0.2.1.6-alpha.
21521 o Code simplifications and refactoring:
21522 - Get rid of router->address, since in all cases it was just the
21523 string representation of router->addr. Resolves ticket 5528.
21525 o Test infrastructure:
21526 - Update to the latest version of tinytest.
21527 - Improve the tinytest implementation of string operation tests so
21528 that comparisons with NULL strings no longer crash the tests; they
21529 now just fail, normally. Fixes bug 9004; bugfix on 0.2.2.4-alpha.
21532 Changes in version 0.2.4.21 - 2014-02-28
21533 Tor 0.2.4.21 further improves security against potential adversaries who
21534 find breaking 1024-bit crypto doable, and backports several stability
21535 and robustness patches from the 0.2.5 branch.
21537 o Major features (client security):
21538 - When we choose a path for a 3-hop circuit, make sure it contains
21539 at least one relay that supports the NTor circuit extension
21540 handshake. Otherwise, there is a chance that we're building
21541 a circuit that's worth attacking by an adversary who finds
21542 breaking 1024-bit crypto doable, and that chance changes the game
21543 theory. Implements ticket 9777.
21546 - Do not treat streams that fail with reason
21547 END_STREAM_REASON_INTERNAL as indicating a definite circuit failure,
21548 since it could also indicate an ENETUNREACH connection error. Fixes
21549 part of bug 10777; bugfix on 0.2.4.8-alpha.
21551 o Code simplification and refactoring:
21552 - Remove data structures which were introduced to implement the
21553 CellStatistics option: they are now redundant with the new timestamp
21554 field in the regular packed_cell_t data structure, which we did
21555 in 0.2.4.18-rc in order to resolve bug 9093. Resolves ticket 10870.
21558 - Always clear OpenSSL bignums before freeing them -- even bignums
21559 that don't contain secrets. Resolves ticket 10793. Patch by
21561 - Build without warnings under clang 3.4. (We have some macros that
21562 define static functions only some of which will get used later in
21563 the module. Starting with clang 3.4, these give a warning unless the
21564 unused attribute is set on them.) Resolves ticket 10904.
21565 - Update geoip and geoip6 files to the February 7 2014 Maxmind
21566 GeoLite2 Country database.
21569 - Set the listen() backlog limit to the largest actually supported
21570 on the system, not to the value in a header file. Fixes bug 9716;
21571 bugfix on every released Tor.
21572 - Treat ENETUNREACH, EACCES, and EPERM connection failures at an
21573 exit node as a NOROUTE error, not an INTERNAL error, since they
21574 can apparently happen when trying to connect to the wrong sort
21575 of netblocks. Fixes part of bug 10777; bugfix on 0.1.0.1-rc.
21576 - Fix build warnings about missing "a2x" comment when building the
21577 manpages from scratch on OpenBSD; OpenBSD calls it "a2x.py".
21578 Fixes bug 10929; bugfix on 0.2.2.9-alpha. Patch from Dana Koch.
21579 - Avoid a segfault on SIGUSR1, where we had freed a connection but did
21580 not entirely remove it from the connection lists. Fixes bug 9602;
21581 bugfix on 0.2.4.4-alpha.
21582 - Fix a segmentation fault in our benchmark code when running with
21583 Fedora's OpenSSL package, or any other OpenSSL that provides
21584 ECDH but not P224. Fixes bug 10835; bugfix on 0.2.4.8-alpha.
21585 - Turn "circuit handshake stats since last time" log messages into a
21586 heartbeat message. Fixes bug 10485; bugfix on 0.2.4.17-rc.
21588 o Documentation fixes:
21589 - Document that all but one DirPort entry must have the NoAdvertise
21590 flag set. Fixes bug 10470; bugfix on 0.2.3.3-alpha / 0.2.3.16-alpha.
21593 Changes in version 0.2.5.2-alpha - 2014-02-13
21594 Tor 0.2.5.2-alpha includes all the fixes from 0.2.4.18-rc and 0.2.4.20,
21595 like the "poor random number generation" fix and the "building too many
21596 circuits" fix. It also further improves security against potential
21597 adversaries who find breaking 1024-bit crypto doable, and launches
21598 pluggable transports on demand (which gets us closer to integrating
21599 pluggable transport support by default -- not to be confused with Tor
21600 bundles enabling pluggable transports and bridges by default).
21602 o Major features (client security):
21603 - When we choose a path for a 3-hop circuit, make sure it contains
21604 at least one relay that supports the NTor circuit extension
21605 handshake. Otherwise, there is a chance that we're building
21606 a circuit that's worth attacking by an adversary who finds
21607 breaking 1024-bit crypto doable, and that chance changes the game
21608 theory. Implements ticket 9777.
21609 - Clients now look at the "usecreatefast" consensus parameter to
21610 decide whether to use CREATE_FAST or CREATE cells for the first hop
21611 of their circuit. This approach can improve security on connections
21612 where Tor's circuit handshake is stronger than the available TLS
21613 connection security levels, but the tradeoff is more computational
21614 load on guard relays. Implements proposal 221. Resolves ticket 9386.
21616 o Major features (bridges):
21617 - Don't launch pluggable transport proxies if we don't have any
21618 bridges configured that would use them. Now we can list many
21619 pluggable transports, and Tor will dynamically start one when it
21620 hears a bridge address that needs it. Resolves ticket 5018.
21621 - The bridge directory authority now assigns status flags (Stable,
21622 Guard, etc) to bridges based on thresholds calculated over all
21623 Running bridges. Now bridgedb can finally make use of its features
21624 to e.g. include at least one Stable bridge in its answers. Fixes
21627 o Major features (other):
21628 - Extend ORCONN controller event to include an "ID" parameter,
21629 and add four new controller event types CONN_BW, CIRC_BW,
21630 CELL_STATS, and TB_EMPTY that show connection and circuit usage.
21631 The new events are emitted in private Tor networks only, with the
21632 goal of being able to better track performance and load during
21633 full-network simulations. Implements proposal 218 and ticket 7359.
21634 - On some platforms (currently: recent OSX versions, glibc-based
21635 platforms that support the ELF format, and a few other
21636 Unix-like operating systems), Tor can now dump stack traces
21637 when a crash occurs or an assertion fails. By default, traces
21638 are dumped to stderr (if possible) and to any logs that are
21639 reporting errors. Implements ticket 9299.
21642 - Avoid a segfault on SIGUSR1, where we had freed a connection but did
21643 not entirely remove it from the connection lists. Fixes bug 9602;
21644 bugfix on 0.2.4.4-alpha.
21645 - Do not treat streams that fail with reason
21646 END_STREAM_REASON_INTERNAL as indicating a definite circuit failure,
21647 since it could also indicate an ENETUNREACH connection error. Fixes
21648 part of bug 10777; bugfix on 0.2.4.8-alpha.
21650 o Major bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.20):
21651 - Do not allow OpenSSL engines to replace the PRNG, even when
21652 HardwareAccel is set. The only default builtin PRNG engine uses
21653 the Intel RDRAND instruction to replace the entire PRNG, and
21654 ignores all attempts to seed it with more entropy. That's
21655 cryptographically stupid: the right response to a new alleged
21656 entropy source is never to discard all previously used entropy
21657 sources. Fixes bug 10402; works around behavior introduced in
21658 OpenSSL 1.0.0. Diagnosis and investigation thanks to "coderman"
21660 - Fix assertion failure when AutomapHostsOnResolve yields an IPv6
21661 address. Fixes bug 10465; bugfix on 0.2.4.7-alpha.
21662 - Avoid launching spurious extra circuits when a stream is pending.
21663 This fixes a bug where any circuit that _wasn't_ unusable for new
21664 streams would be treated as if it were, causing extra circuits to
21665 be launched. Fixes bug 10456; bugfix on 0.2.4.12-alpha.
21667 o Major bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
21668 - No longer stop reading or writing on cpuworker connections when
21669 our rate limiting buckets go empty. Now we should handle circuit
21670 handshake requests more promptly. Resolves bug 9731.
21671 - Stop trying to bootstrap all our directory information from
21672 only our first guard. Discovered while fixing bug 9946; bugfix
21675 o Minor features (bridges, pluggable transports):
21676 - Add threshold cutoffs to the networkstatus document created by
21677 the Bridge Authority. Fixes bug 1117.
21678 - On Windows, spawn background processes using the CREATE_NO_WINDOW
21679 flag. Now Tor Browser Bundle 3.5 with pluggable transports enabled
21680 doesn't pop up a blank console window. (In Tor Browser Bundle 2.x,
21681 Vidalia set this option for us.) Implements ticket 10297.
21683 o Minor features (security):
21684 - Always clear OpenSSL bignums before freeing them -- even bignums
21685 that don't contain secrets. Resolves ticket 10793. Patch by
21688 o Minor features (config options and command line):
21689 - Add an --allow-missing-torrc commandline option that tells Tor to
21690 run even if the configuration file specified by -f is not available.
21691 Implements ticket 10060.
21692 - Add support for the TPROXY transparent proxying facility on Linux.
21693 See documentation for the new TransProxyType option for more
21694 details. Implementation by "thomo". Closes ticket 10582.
21696 o Minor features (controller):
21697 - Add a new "HS_DESC" controller event that reports activities
21698 related to hidden service descriptors. Resolves ticket 8510.
21699 - New "DROPGUARDS" controller command to forget all current entry
21700 guards. Not recommended for ordinary use, since replacing guards
21701 too frequently makes several attacks easier. Resolves ticket 9934;
21704 o Minor features (build):
21705 - Assume that a user using ./configure --host wants to cross-compile,
21706 and give an error if we cannot find a properly named
21707 tool-chain. Add a --disable-tool-name-check option to proceed
21708 nevertheless. Addresses ticket 9869. Patch by Benedikt Gollatz.
21709 - If we run ./configure and the compiler recognizes -fstack-protector
21710 but the linker rejects it, warn the user about a potentially missing
21711 libssp package. Addresses ticket 9948. Patch from Benedikt Gollatz.
21713 o Minor features (testing):
21714 - If Python is installed, "make check" now runs extra tests beyond
21715 the unit test scripts.
21716 - When bootstrapping a test network, sometimes very few relays get
21717 the Guard flag. Now a new option "TestingDirAuthVoteGuard" can
21718 specify a set of relays which should be voted Guard regardless of
21719 their uptime or bandwidth. Addresses ticket 9206.
21721 o Minor features (log messages):
21722 - When ServerTransportPlugin is set on a bridge, Tor can write more
21723 useful statistics about bridge use in its extrainfo descriptors,
21724 but only if the Extended ORPort ("ExtORPort") is set too. Add a
21725 log message to inform the user in this case. Resolves ticket 9651.
21726 - When receiving a new controller connection, log the origin address.
21727 Resolves ticket 9698; patch from "sigpipe".
21728 - When logging OpenSSL engine status at startup, log the status of
21729 more engines. Fixes ticket 10043; patch from Joshua Datko.
21730 - Turn "circuit handshake stats since last time" log messages into a
21731 heartbeat message. Fixes bug 10485; bugfix on 0.2.4.17-rc.
21733 o Minor features (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
21734 - Improve the circuit queue out-of-memory handler. Previously, when
21735 we ran low on memory, we'd close whichever circuits had the most
21736 queued cells. Now, we close those that have the *oldest* queued
21737 cells, on the theory that those are most responsible for us
21738 running low on memory. Based on analysis from a forthcoming paper
21739 by Jansen, Tschorsch, Johnson, and Scheuermann. Fixes bug 9093.
21740 - Generate bootstrapping status update events correctly when fetching
21741 microdescriptors. Fixes bug 9927.
21742 - Update to the October 2 2013 Maxmind GeoLite Country database.
21744 o Minor bugfixes (clients):
21745 - When closing a channel that has already been open, do not close
21746 pending circuits that were waiting to connect to the same relay.
21747 Fixes bug 9880; bugfix on 0.2.5.1-alpha. Thanks to skruffy for
21750 o Minor bugfixes (relays):
21751 - Treat ENETUNREACH, EACCES, and EPERM connection failures at an
21752 exit node as a NOROUTE error, not an INTERNAL error, since they
21753 can apparently happen when trying to connect to the wrong sort
21754 of netblocks. Fixes part of bug 10777; bugfix on 0.1.0.1-rc.
21756 o Minor bugfixes (bridges):
21757 - Fix a bug where the first connection works to a bridge that uses a
21758 pluggable transport with client-side parameters, but we don't send
21759 the client-side parameters on subsequent connections. (We don't
21760 use any pluggable transports with client-side parameters yet,
21761 but ScrambleSuit will soon become the first one.) Fixes bug 9162;
21762 bugfix on 0.2.0.3-alpha. Based on a patch from "rl1987".
21764 o Minor bugfixes (node selection):
21765 - If ExcludeNodes is set, consider non-excluded hidden service
21766 directory servers before excluded ones. Do not consider excluded
21767 hidden service directory servers at all if StrictNodes is
21768 set. (Previously, we would sometimes decide to connect to those
21769 servers, and then realize before we initiated a connection that
21770 we had excluded them.) Fixes bug 10722; bugfix on 0.2.0.10-alpha.
21771 Reported by "mr-4".
21772 - If we set the ExitNodes option but it doesn't include any nodes
21773 that have the Exit flag, we would choose not to bootstrap. Now we
21774 bootstrap so long as ExitNodes includes nodes which can exit to
21775 some port. Fixes bug 10543; bugfix on 0.2.4.10-alpha.
21777 o Minor bugfixes (controller and command-line):
21778 - If changing a config option via "setconf" fails in a recoverable
21779 way, we used to nonetheless write our new control ports to the
21780 file described by the "ControlPortWriteToFile" option. Now we only
21781 write out that file if we successfully switch to the new config
21782 option. Fixes bug 5605; bugfix on 0.2.2.26-beta. Patch from "Ryman".
21783 - When a command-line option such as --version or --help that
21784 ordinarily implies --hush appears on the command line along with
21785 --quiet, then actually obey --quiet. Previously, we obeyed --quiet
21786 only if it appeared later on the command line. Fixes bug 9578;
21787 bugfix on 0.2.5.1-alpha.
21789 o Minor bugfixes (code correctness):
21790 - Previously we used two temporary files when writing descriptors to
21791 disk; now we only use one. Fixes bug 1376.
21792 - Remove an erroneous (but impossible and thus harmless) pointer
21793 comparison that would have allowed compilers to skip a bounds
21794 check in channeltls.c. Fixes bugs 10313 and 9980; bugfix on
21795 0.2.0.10-alpha. Noticed by Jared L Wong and David Fifield.
21796 - Fix an always-true assertion in pluggable transports code so it
21797 actually checks what it was trying to check. Fixes bug 10046;
21798 bugfix on 0.2.3.9-alpha. Found by "dcb".
21800 o Minor bugfixes (protocol correctness):
21801 - When receiving a VERSIONS cell with an odd number of bytes, close
21802 the connection immediately since the cell is malformed. Fixes bug
21803 10365; bugfix on 0.2.0.10-alpha. Spotted by "bobnomnom"; fix by
21806 o Minor bugfixes (build):
21807 - Restore the ability to compile Tor with V2_HANDSHAKE_SERVER
21808 turned off (that is, without support for v2 link handshakes). Fixes
21809 bug 4677; bugfix on 0.2.3.2-alpha. Patch from "piet".
21810 - Fix compilation warnings and startup issues when running with
21811 "Sandbox 1" and libseccomp-2.1.0. Fixes bug 10563; bugfix on
21813 - Fix compilation on Solaris 9, which didn't like us having an
21814 identifier named "sun". Fixes bug 10565; bugfix in 0.2.5.1-alpha.
21816 o Minor bugfixes (testing):
21817 - Fix a segmentation fault in our benchmark code when running with
21818 Fedora's OpenSSL package, or any other OpenSSL that provides
21819 ECDH but not P224. Fixes bug 10835; bugfix on 0.2.4.8-alpha.
21821 o Minor bugfixes (log messages):
21822 - Fix a bug where clients using bridges would report themselves
21823 as 50% bootstrapped even without a live consensus document.
21824 Fixes bug 9922; bugfix on 0.2.1.1-alpha.
21825 - Suppress a warning where, if there's only one directory authority
21826 in the network, we would complain that votes and signatures cannot
21827 be uploaded to other directory authorities. Fixes bug 10842;
21828 bugfix on 0.2.2.26-beta.
21829 - Report bootstrapping progress correctly when we're downloading
21830 microdescriptors. We had updated our "do we have enough microdescs
21831 to begin building circuits?" logic most recently in 0.2.4.10-alpha
21832 (see bug 5956), but we left the bootstrap status event logic at
21833 "how far through getting 1/4 of them are we?" Fixes bug 9958;
21834 bugfix on 0.2.2.36, which is where they diverged (see bug 5343).
21836 o Minor bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.20):
21837 - Avoid a crash bug when starting with a corrupted microdescriptor
21838 cache file. Fixes bug 10406; bugfix on 0.2.2.6-alpha.
21839 - If we fail to dump a previously cached microdescriptor to disk, avoid
21840 freeing duplicate data later on. Fixes bug 10423; bugfix on
21841 0.2.4.13-alpha. Spotted by "bobnomnom".
21843 o Minor bugfixes on 0.2.4.x (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
21844 - Correctly log long IPv6 exit policies, instead of truncating them
21845 or reporting an error. Fixes bug 9596; bugfix on 0.2.4.7-alpha.
21846 - Our default TLS ecdhe groups were backwards: we meant to be using
21847 P224 for relays (for performance win) and P256 for bridges (since
21848 it is more common in the wild). Instead we had it backwards. After
21849 reconsideration, we decided that the default should be P256 on all
21850 hosts, since its security is probably better, and since P224 is
21851 reportedly used quite little in the wild. Found by "skruffy" on
21852 IRC. Fix for bug 9780; bugfix on 0.2.4.8-alpha.
21853 - Free directory authority certificate download statuses on exit
21854 rather than leaking them. Fixes bug 9644; bugfix on 0.2.4.13-alpha.
21856 o Minor bugfixes on 0.2.3.x (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
21857 - If the guard we choose first doesn't answer, we would try the
21858 second guard, but once we connected to the second guard we would
21859 abandon it and retry the first one, slowing down bootstrapping.
21860 The fix is to treat all our initially chosen guards as acceptable
21861 to use. Fixes bug 9946; bugfix on 0.1.1.11-alpha.
21862 - Fix an assertion failure that would occur when disabling the
21863 ORPort setting on a running Tor process while accounting was
21864 enabled. Fixes bug 6979; bugfix on 0.2.2.18-alpha.
21865 - When examining the list of network interfaces to find our address,
21866 do not consider non-running or disabled network interfaces. Fixes
21867 bug 9904; bugfix on 0.2.3.11-alpha. Patch from "hantwister".
21868 - Avoid an off-by-one error when checking buffer boundaries when
21869 formatting the exit status of a pluggable transport helper.
21870 This is probably not an exploitable bug, but better safe than
21871 sorry. Fixes bug 9928; bugfix on 0.2.3.18-rc. Bug found by
21874 o Removed code and features:
21875 - Clients now reject any directory authority certificates lacking
21876 a dir-key-crosscert element. These have been included since
21877 0.2.1.9-alpha, so there's no real reason for them to be optional
21878 any longer. Completes proposal 157. Resolves ticket 10162.
21879 - Remove all code that existed to support the v2 directory system,
21880 since there are no longer any v2 directory authorities. Resolves
21882 - Remove the HSAuthoritativeDir and AlternateHSAuthority torrc
21883 options, which were used for designating authorities as "Hidden
21884 service authorities". There has been no use of hidden service
21885 authorities since 0.2.2.1-alpha, when we stopped uploading or
21886 downloading v0 hidden service descriptors. Fixes bug 10881; also
21887 part of a fix for bug 10841.
21889 o Code simplification and refactoring:
21890 - Remove some old fallback code designed to keep Tor clients working
21891 in a network with only two working relays. Elsewhere in the code we
21892 have long since stopped supporting such networks, so there wasn't
21893 much point in keeping it around. Addresses ticket 9926.
21894 - Reject 0-length EXTEND2 cells more explicitly. Fixes bug 10536;
21895 bugfix on 0.2.4.8-alpha. Reported by "cypherpunks".
21896 - Remove data structures which were introduced to implement the
21897 CellStatistics option: they are now redundant with the addition
21898 of a timestamp to the regular packed_cell_t data structure, which
21899 we did in 0.2.4.18-rc in order to resolve ticket 9093. Implements
21902 o Documentation (man page) fixes:
21903 - Update manpage to describe some of the files you can expect to
21904 find in Tor's DataDirectory. Addresses ticket 9839.
21905 - Document that all but one DirPort entry must have the NoAdvertise
21906 flag set. Fixes bug 10470; bugfix on 0.2.3.3-alpha / 0.2.3.16-alpha.
21908 o Documentation fixes (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
21909 - Clarify the usage and risks of setting the ContactInfo torrc line
21910 for your relay or bridge. Resolves ticket 9854.
21911 - Add anchors to the manpage so we can link to the html version of
21912 the documentation for specific options. Resolves ticket 9866.
21913 - Replace remaining references to DirServer in man page and
21914 log entries. Resolves ticket 10124.
21917 - Make the "tor-gencert" tool used by directory authority operators
21918 create 2048-bit signing keys by default (rather than 1024-bit, since
21919 1024-bit is uncomfortably small these days). Addresses ticket 10324.
21922 Changes in version 0.2.4.20 - 2013-12-22
21923 Tor 0.2.4.20 fixes potentially poor random number generation for users
21924 who 1) use OpenSSL 1.0.0 or later, 2) set "HardwareAccel 1" in their
21925 torrc file, 3) have "Sandy Bridge" or "Ivy Bridge" Intel processors,
21926 and 4) have no state file in their DataDirectory (as would happen on
21927 first start). Users who generated relay or hidden service identity
21928 keys in such a situation should discard them and generate new ones.
21930 This release also fixes a logic error that caused Tor clients to build
21931 many more preemptive circuits than they actually need.
21934 - Do not allow OpenSSL engines to replace the PRNG, even when
21935 HardwareAccel is set. The only default builtin PRNG engine uses
21936 the Intel RDRAND instruction to replace the entire PRNG, and
21937 ignores all attempts to seed it with more entropy. That's
21938 cryptographically stupid: the right response to a new alleged
21939 entropy source is never to discard all previously used entropy
21940 sources. Fixes bug 10402; works around behavior introduced in
21941 OpenSSL 1.0.0. Diagnosis and investigation thanks to "coderman"
21943 - Fix assertion failure when AutomapHostsOnResolve yields an IPv6
21944 address. Fixes bug 10465; bugfix on 0.2.4.7-alpha.
21945 - Avoid launching spurious extra circuits when a stream is pending.
21946 This fixes a bug where any circuit that _wasn't_ unusable for new
21947 streams would be treated as if it were, causing extra circuits to
21948 be launched. Fixes bug 10456; bugfix on 0.2.4.12-alpha.
21951 - Avoid a crash bug when starting with a corrupted microdescriptor
21952 cache file. Fixes bug 10406; bugfix on 0.2.2.6-alpha.
21953 - If we fail to dump a previously cached microdescriptor to disk, avoid
21954 freeing duplicate data later on. Fixes bug 10423; bugfix on
21955 0.2.4.13-alpha. Spotted by "bobnomnom".
21958 Changes in version 0.2.4.19 - 2013-12-11
21959 The Tor 0.2.4 release series is dedicated to the memory of Aaron Swartz
21960 (1986-2013). Aaron worked on diverse projects including helping to guide
21961 Creative Commons, playing a key role in stopping SOPA/PIPA, bringing
21962 transparency to the U.S government's PACER documents, and contributing
21963 design and development for Tor and Tor2Web. Aaron was one of the latest
21964 martyrs in our collective fight for civil liberties and human rights,
21965 and his death is all the more painful because he was one of us.
21967 Tor 0.2.4.19, the first stable release in the 0.2.4 branch, features
21968 a new circuit handshake and link encryption that use ECC to provide
21969 better security and efficiency; makes relays better manage circuit
21970 creation requests; uses "directory guards" to reduce client enumeration
21971 risks; makes bridges collect and report statistics about the pluggable
21972 transports they support; cleans up and improves our geoip database;
21973 gets much closer to IPv6 support for clients, bridges, and relays; makes
21974 directory authorities use measured bandwidths rather than advertised
21975 ones when computing flags and thresholds; disables client-side DNS
21976 caching to reduce tracking risks; and fixes a big bug in bridge
21977 reachability testing. This release introduces two new design
21978 abstractions in the code: a new "channel" abstraction between circuits
21979 and or_connections to allow for implementing alternate relay-to-relay
21980 transports, and a new "circuitmux" abstraction storing the queue of
21981 circuits for a channel. The release also includes many stability,
21982 security, and privacy fixes.
21985 Changes in version 0.2.4.18-rc - 2013-11-16
21986 Tor 0.2.4.18-rc is the fourth release candidate for the Tor 0.2.4.x
21987 series. It takes a variety of fixes from the 0.2.5.x branch to improve
21988 stability, performance, and better handling of edge cases.
21991 - Re-enable TLS 1.1 and 1.2 when built with OpenSSL 1.0.1e or later.
21992 Resolves ticket 6055. (OpenSSL before 1.0.1 didn't have TLS 1.1 or
21993 1.2, and OpenSSL from 1.0.1 through 1.0.1d had bugs that prevented
21994 renegotiation from working with TLS 1.1 or 1.2, so we had disabled
21995 them to solve bug 6033.)
21998 - No longer stop reading or writing on cpuworker connections when
21999 our rate limiting buckets go empty. Now we should handle circuit
22000 handshake requests more promptly. Resolves bug 9731.
22001 - If we are unable to save a microdescriptor to the journal, do not
22002 drop it from memory and then reattempt downloading it. Fixes bug
22003 9645; bugfix on 0.2.2.6-alpha.
22004 - Stop trying to bootstrap all our directory information from
22005 only our first guard. Discovered while fixing bug 9946; bugfix
22007 - The new channel code sometimes lost track of in-progress circuits,
22008 causing long-running clients to stop building new circuits. The
22009 fix is to always call circuit_n_chan_done(chan, 0) from
22010 channel_closed(). Fixes bug 9776; bugfix on 0.2.4.17-rc.
22012 o Minor bugfixes (on 0.2.4.x):
22013 - Correctly log long IPv6 exit policies, instead of truncating them
22014 or reporting an error. Fixes bug 9596; bugfix on 0.2.4.7-alpha.
22015 - Our default TLS ecdhe groups were backwards: we meant to be using
22016 P224 for relays (for performance win) and P256 for bridges (since
22017 it is more common in the wild). Instead we had it backwards. After
22018 reconsideration, we decided that the default should be P256 on all
22019 hosts, since its security is probably better, and since P224 is
22020 reportedly used quite little in the wild. Found by "skruffy" on
22021 IRC. Fix for bug 9780; bugfix on 0.2.4.8-alpha.
22022 - Free directory authority certificate download statuses on exit
22023 rather than leaking them. Fixes bug 9644; bugfix on 0.2.4.13-alpha.
22025 o Minor bugfixes (on 0.2.3.x and earlier):
22026 - If the guard we choose first doesn't answer, we would try the
22027 second guard, but once we connected to the second guard we would
22028 abandon it and retry the first one, slowing down bootstrapping.
22029 The fix is to treat all our initially chosen guards as acceptable
22030 to use. Fixes bug 9946; bugfix on 0.1.1.11-alpha.
22031 - Fix an assertion failure that would occur when disabling the
22032 ORPort setting on a running Tor process while accounting was
22033 enabled. Fixes bug 6979; bugfix on 0.2.2.18-alpha.
22034 - When examining the list of network interfaces to find our address,
22035 do not consider non-running or disabled network interfaces. Fixes
22036 bug 9904; bugfix on 0.2.3.11-alpha. Patch from "hantwister".
22037 - Avoid an off-by-one error when checking buffer boundaries when
22038 formatting the exit status of a pluggable transport helper.
22039 This is probably not an exploitable bug, but better safe than
22040 sorry. Fixes bug 9928; bugfix on 0.2.3.18-rc. Bug found by
22043 o Minor features (protecting client timestamps):
22044 - Clients no longer send timestamps in their NETINFO cells. These were
22045 not used for anything, and they provided one small way for clients
22046 to be distinguished from each other as they moved from network to
22047 network or behind NAT. Implements part of proposal 222.
22048 - Clients now round timestamps in INTRODUCE cells down to the nearest
22049 10 minutes. If a new Support022HiddenServices option is set to 0, or
22050 if it's set to "auto" and the feature is disabled in the consensus,
22051 the timestamp is sent as 0 instead. Implements part of proposal 222.
22052 - Stop sending timestamps in AUTHENTICATE cells. This is not such
22053 a big deal from a security point of view, but it achieves no actual
22054 good purpose, and isn't needed. Implements part of proposal 222.
22055 - Reduce down accuracy of timestamps in hidden service descriptors.
22056 Implements part of proposal 222.
22058 o Minor features (other):
22059 - Improve the circuit queue out-of-memory handler. Previously, when
22060 we ran low on memory, we'd close whichever circuits had the most
22061 queued cells. Now, we close those that have the *oldest* queued
22062 cells, on the theory that those are most responsible for us
22063 running low on memory. Based on analysis from a forthcoming paper
22064 by Jansen, Tschorsch, Johnson, and Scheuermann. Fixes bug 9093.
22065 - Generate bootstrapping status update events correctly when fetching
22066 microdescriptors. Fixes bug 9927.
22067 - Update to the October 2 2013 Maxmind GeoLite Country database.
22069 o Documentation fixes:
22070 - Clarify the usage and risks of setting the ContactInfo torrc line
22071 for your relay or bridge. Resolves ticket 9854.
22072 - Add anchors to the manpage so we can link to the html version of
22073 the documentation for specific options. Resolves ticket 9866.
22074 - Replace remaining references to DirServer in man page and
22075 log entries. Resolves ticket 10124.
22078 Changes in version 0.2.5.1-alpha - 2013-10-02
22079 Tor 0.2.5.1-alpha introduces experimental support for syscall sandboxing
22080 on Linux, allows bridges that offer pluggable transports to report usage
22081 statistics, fixes many issues to make testing easier, and provides
22082 a pile of minor features and bugfixes that have been waiting for a
22083 release of the new branch.
22085 This is the first alpha release in a new series, so expect there to
22086 be bugs. Users who would rather test out a more stable branch should
22087 stay with 0.2.4.x for now.
22089 o Major features (security):
22090 - Use the seccomp2 syscall filtering facility on Linux to limit
22091 which system calls Tor can invoke. This is an experimental,
22092 Linux-only feature to provide defense-in-depth against unknown
22093 attacks. To try turning it on, set "Sandbox 1" in your torrc
22094 file. Please be ready to report bugs. We hope to add support
22095 for better sandboxing in the future, including more fine-grained
22096 filters, better division of responsibility, and support for more
22097 platforms. This work has been done by Cristian-Matei Toader for
22098 Google Summer of Code.
22099 - Re-enable TLS 1.1 and 1.2 when built with OpenSSL 1.0.1e or later.
22100 Resolves ticket 6055. (OpenSSL before 1.0.1 didn't have TLS 1.1 or
22101 1.2, and OpenSSL from 1.0.1 through 1.0.1d had bugs that prevented
22102 renegotiation from working with TLS 1.1 or 1.2, so we had disabled
22103 them to solve bug 6033.)
22105 o Major features (other):
22106 - Add support for passing arguments to managed pluggable transport
22107 proxies. Implements ticket 3594.
22108 - Bridges now track GeoIP information and the number of their users
22109 even when pluggable transports are in use, and report usage
22110 statistics in their extra-info descriptors. Resolves tickets 4773
22112 - Make testing Tor networks bootstrap better: lower directory fetch
22113 retry schedules and maximum interval without directory requests,
22114 and raise maximum download tries. Implements ticket 6752.
22115 - Add make target 'test-network' to run tests on a Chutney network.
22116 Implements ticket 8530.
22117 - The ntor handshake is now on-by-default, no matter what the
22118 directory authorities recommend. Implements ticket 8561.
22121 - Instead of writing destroy cells directly to outgoing connection
22122 buffers, queue them and intersperse them with other outgoing cells.
22123 This can prevent a set of resource starvation conditions where too
22124 many pending destroy cells prevent data cells from actually getting
22125 delivered. Reported by "oftc_must_be_destroyed". Fixes bug 7912;
22126 bugfix on 0.2.0.1-alpha.
22127 - If we are unable to save a microdescriptor to the journal, do not
22128 drop it from memory and then reattempt downloading it. Fixes bug
22129 9645; bugfix on 0.2.2.6-alpha.
22130 - The new channel code sometimes lost track of in-progress circuits,
22131 causing long-running clients to stop building new circuits. The
22132 fix is to always call circuit_n_chan_done(chan, 0) from
22133 channel_closed(). Fixes bug 9776; bugfix on 0.2.4.17-rc.
22136 - Tor now builds each source file in two modes: a mode that avoids
22137 exposing identifiers needlessly, and another mode that exposes
22138 more identifiers for testing. This lets the compiler do better at
22139 optimizing the production code, while enabling us to take more
22140 radical measures to let the unit tests test things.
22141 - The production builds no longer include functions used only in
22142 the unit tests; all functions exposed from a module only for
22143 unit-testing are now static in production builds.
22144 - Add an --enable-coverage configuration option to make the unit
22145 tests (and a new src/or/tor-cov target) to build with gcov test
22149 - We now have rudimentary function mocking support that our unit
22150 tests can use to test functions in isolation. Function mocking
22151 lets the tests temporarily replace a function's dependencies with
22152 stub functions, so that the tests can check the function without
22153 invoking the other functions it calls.
22154 - Add more unit tests for the <circid,channel>->circuit map, and
22155 the destroy-cell-tracking code to fix bug 7912.
22156 - Unit tests for failing cases of the TAP onion handshake.
22157 - More unit tests for address-manipulation functions.
22159 o Minor features (protecting client timestamps):
22160 - Clients no longer send timestamps in their NETINFO cells. These were
22161 not used for anything, and they provided one small way for clients
22162 to be distinguished from each other as they moved from network to
22163 network or behind NAT. Implements part of proposal 222.
22164 - Clients now round timestamps in INTRODUCE cells down to the nearest
22165 10 minutes. If a new Support022HiddenServices option is set to 0, or
22166 if it's set to "auto" and the feature is disabled in the consensus,
22167 the timestamp is sent as 0 instead. Implements part of proposal 222.
22168 - Stop sending timestamps in AUTHENTICATE cells. This is not such
22169 a big deal from a security point of view, but it achieves no actual
22170 good purpose, and isn't needed. Implements part of proposal 222.
22171 - Reduce down accuracy of timestamps in hidden service descriptors.
22172 Implements part of proposal 222.
22174 o Minor features (config options):
22175 - Config (torrc) lines now handle fingerprints which are missing
22176 their initial '$'. Resolves ticket 4341; improvement over 0.0.9pre5.
22177 - Support a --dump-config option to print some or all of the
22178 configured options. Mainly useful for debugging the command-line
22179 option parsing code. Helps resolve ticket 4647.
22180 - Raise awareness of safer logging: notify user of potentially
22181 unsafe config options, like logging more verbosely than severity
22182 "notice" or setting SafeLogging to 0. Resolves ticket 5584.
22183 - Add a new configuration option TestingV3AuthVotingStartOffset
22184 that bootstraps a network faster by changing the timing for
22185 consensus votes. Addresses ticket 8532.
22186 - Add a new torrc option "ServerTransportOptions" that allows
22187 bridge operators to pass configuration parameters to their
22188 pluggable transports. Resolves ticket 8929.
22189 - The config (torrc) file now accepts bandwidth and space limits in
22190 bits as well as bytes. (Anywhere that you can say "2 Kilobytes",
22191 you can now say "16 kilobits", and so on.) Resolves ticket 9214.
22194 o Minor features (build):
22195 - Add support for `--library-versions` flag. Implements ticket 6384.
22196 - Return the "unexpected sendme" warnings to a warn severity, but make
22197 them rate limited, to help diagnose ticket 8093.
22198 - Detect a missing asciidoc, and warn the user about it, during
22199 configure rather than at build time. Fixes issue 6506. Patch from
22202 o Minor features (other):
22203 - Use the SOCK_NONBLOCK socket type, if supported, to open nonblocking
22204 sockets in a single system call. Implements ticket 5129.
22205 - Log current accounting state (bytes sent and received + remaining
22206 time for the current accounting period) in the relay's heartbeat
22207 message. Implements ticket 5526; patch from Peter Retzlaff.
22208 - Implement the TRANSPORT_LAUNCHED control port event that
22209 notifies controllers about new launched pluggable
22210 transports. Resolves ticket 5609.
22211 - If we're using the pure-C 32-bit curve25519_donna implementation
22212 of curve25519, build it with the -fomit-frame-pointer option to
22213 make it go faster on register-starved hosts. This improves our
22214 handshake performance by about 6% on i386 hosts without nacl.
22215 Closes ticket 8109.
22216 - Update to the September 4 2013 Maxmind GeoLite Country database.
22219 - Set the listen() backlog limit to the largest actually supported
22220 on the system, not to the value in a header file. Fixes bug 9716;
22221 bugfix on every released Tor.
22222 - No longer accept malformed http headers when parsing urls from
22223 headers. Now we reply with Bad Request ("400"). Fixes bug 2767;
22224 bugfix on 0.0.6pre1.
22225 - In munge_extrainfo_into_routerinfo(), check the return value of
22226 memchr(). This would have been a serious issue if we ever passed
22227 it a non-extrainfo. Fixes bug 8791; bugfix on 0.2.0.6-alpha. Patch
22229 - On the chance that somebody manages to build Tor on a
22230 platform where time_t is unsigned, correct the way that
22231 microdesc_add_to_cache() handles negative time arguments.
22232 Fixes bug 8042; bugfix on 0.2.3.1-alpha.
22233 - Reject relative control socket paths and emit a warning. Previously,
22234 single-component control socket paths would be rejected, but Tor
22235 would not log why it could not validate the config. Fixes bug 9258;
22236 bugfix on 0.2.3.16-alpha.
22238 o Minor bugfixes (command line):
22239 - Use a single command-line parser for parsing torrc options on the
22240 command line and for finding special command-line options to avoid
22241 inconsistent behavior for torrc option arguments that have the same
22242 names as command-line options. Fixes bugs 4647 and 9578; bugfix on
22244 - No longer allow 'tor --hash-password' with no arguments. Fixes bug
22245 9573; bugfix on 0.0.9pre5.
22247 o Minor fixes (build, auxiliary programs):
22248 - Stop preprocessing the "torify" script with autoconf, since
22249 it no longer refers to LOCALSTATEDIR. Fixes bug 5505; patch
22251 - The tor-fw-helper program now follows the standard convention and
22252 exits with status code "0" on success. Fixes bug 9030; bugfix on
22253 0.2.3.1-alpha. Patch by Arlo Breault.
22254 - Corrected ./configure advice for what openssl dev package you should
22255 install on Debian. Fixes bug 9207; bugfix on 0.2.0.1-alpha.
22257 o Minor code improvements:
22258 - Remove constants and tests for PKCS1 padding; it's insecure and
22259 shouldn't be used for anything new. Fixes bug 8792; patch
22261 - Remove instances of strcpy() from the unit tests. They weren't
22262 hurting anything, since they were only in the unit tests, but it's
22263 embarrassing to have strcpy() in the code at all, and some analysis
22264 tools don't like it. Fixes bug 8790; bugfix on 0.2.3.6-alpha and
22265 0.2.3.8-alpha. Patch from Arlo Breault.
22267 o Removed features:
22268 - Remove migration code from when we renamed the "cached-routers"
22269 file to "cached-descriptors" back in 0.2.0.8-alpha. This
22270 incidentally resolves ticket 6502 by cleaning up the related code
22271 a bit. Patch from Akshay Hebbar.
22273 o Code simplification and refactoring:
22274 - Extract the common duplicated code for creating a subdirectory
22275 of the data directory and writing to a file in it. Fixes ticket
22276 4282; patch from Peter Retzlaff.
22277 - Since OpenSSL 0.9.7, the i2d_*() functions support allocating output
22278 buffer. Avoid calling twice: i2d_RSAPublicKey(), i2d_DHparams(),
22279 i2d_X509(), and i2d_PublicKey(). Resolves ticket 5170.
22280 - Add a set of accessor functions for the circuit timeout data
22281 structure. Fixes ticket 6153; patch from "piet".
22282 - Clean up exit paths from connection_listener_new(). Closes ticket
22283 8789. Patch from Arlo Breault.
22284 - Since we rely on OpenSSL 0.9.8 now, we can use EVP_PKEY_cmp()
22285 and drop our own custom pkey_eq() implementation. Fixes bug 9043.
22286 - Use a doubly-linked list to implement the global circuit list.
22287 Resolves ticket 9108. Patch from Marek Majkowski.
22288 - Remove contrib/id_to_fp.c since it wasn't used anywhere.
22291 Changes in version 0.2.4.17-rc - 2013-09-05
22292 Tor 0.2.4.17-rc is the third release candidate for the Tor 0.2.4.x
22293 series. It adds an emergency step to help us tolerate the massive
22294 influx of users: 0.2.4 clients using the new (faster and safer) "NTor"
22295 circuit-level handshakes now effectively jump the queue compared to
22296 the 0.2.3 clients using "TAP" handshakes. This release also fixes a
22297 big bug hindering bridge reachability tests.
22300 - Relays now process the new "NTor" circuit-level handshake requests
22301 with higher priority than the old "TAP" circuit-level handshake
22302 requests. We still process some TAP requests to not totally starve
22303 0.2.3 clients when NTor becomes popular. A new consensus parameter
22304 "NumNTorsPerTAP" lets us tune the balance later if we need to.
22305 Implements ticket 9574.
22308 - If the circuit build timeout logic is disabled (via the consensus,
22309 or because we are an authority), then don't build testing circuits.
22310 Fixes bug 9657; bugfix on 0.2.2.14-alpha.
22311 - Bridges now send AUTH_CHALLENGE cells during their v3 handshakes;
22312 previously they did not, which prevented them from receiving
22313 successful connections from relays for self-test or bandwidth
22314 testing. Also, when a relay is extending a circuit to a bridge,
22315 it needs to send a NETINFO cell, even when the bridge hasn't sent
22316 an AUTH_CHALLENGE cell. Fixes bug 9546; bugfix on 0.2.3.6-alpha.
22317 - If the time to download the next old-style networkstatus is in
22318 the future, do not decline to consider whether to download the
22319 next microdescriptor networkstatus. Fixes bug 9564; bugfix on
22323 - Avoid double-closing the listener socket in our socketpair()
22324 replacement (used on Windows) in the case where the addresses on
22325 our opened sockets don't match what we expected. Fixes bug 9400;
22326 bugfix on 0.0.2pre7. Found by Coverity.
22328 o Minor fixes (config options):
22329 - Avoid overflows when the user sets MaxCircuitDirtiness to a
22330 ridiculously high value, by imposing a (ridiculously high) 30-day
22331 maximum on MaxCircuitDirtiness.
22332 - Fix the documentation of HeartbeatPeriod to say that the heartbeat
22333 message is logged at notice, not at info.
22334 - Warn and fail if a server is configured not to advertise any
22335 ORPorts at all. (We need *something* to put in our descriptor,
22336 or we just won't work.)
22339 - Track how many "TAP" and "NTor" circuit handshake requests we get,
22340 and how many we complete, and log it every hour to help relay
22341 operators follow trends in network load. Addresses ticket 9658.
22342 - Update to the August 7 2013 Maxmind GeoLite Country database.
22345 Changes in version 0.2.4.16-rc - 2013-08-10
22346 Tor 0.2.4.16-rc is the second release candidate for the Tor 0.2.4.x
22347 series. It fixes several crash bugs in the 0.2.4 branch.
22350 - Fix a bug in the voting algorithm that could yield incorrect results
22351 when a non-naming authority declared too many flags. Fixes bug 9200;
22352 bugfix on 0.2.0.3-alpha.
22353 - Fix an uninitialized read that could in some cases lead to a remote
22354 crash while parsing INTRODUCE2 cells. Bugfix on 0.2.4.1-alpha.
22355 Anybody running a hidden service on the experimental 0.2.4.x
22356 branch should upgrade. (This is, so far as we know, unrelated to
22358 - Avoid an assertion failure when processing DNS replies without the
22359 answer types we expected. Fixes bug 9337; bugfix on 0.2.4.7-alpha.
22360 - Avoid a crash when using --hash-password. Fixes bug 9295; bugfix on
22361 0.2.4.15-rc. Found by stem integration tests.
22364 - Fix an invalid memory read that occurred when a pluggable
22365 transport proxy failed its configuration protocol.
22366 Fixes bug 9288; bugfix on 0.2.4.1-alpha.
22367 - When evaluating whether to use a connection that we haven't
22368 decided is canonical using a recent link protocol version,
22369 decide that it's canonical only if it used address _does_
22370 match the desired address. Fixes bug 9309; bugfix on
22371 0.2.4.4-alpha. Reported by skruffy.
22372 - Make the default behavior of NumDirectoryGuards be to track
22373 NumEntryGuards. Now a user who changes only NumEntryGuards will get
22374 the behavior she expects. Fixes bug 9354; bugfix on 0.2.4.8-alpha.
22375 - Fix a spurious compilation warning with some older versions of
22376 GCC on FreeBSD. Fixes bug 9254; bugfix on 0.2.4.14-alpha.
22379 - Update to the July 3 2013 Maxmind GeoLite Country database.
22382 Changes in version 0.2.4.15-rc - 2013-07-01
22383 Tor 0.2.4.15-rc is the first release candidate for the Tor 0.2.4.x
22384 series. It fixes a few smaller bugs, but generally appears stable.
22385 Please test it and let us know whether it is!
22388 - When receiving a new configuration file via the control port's
22389 LOADCONF command, do not treat the defaults file as absent.
22390 Fixes bug 9122; bugfix on 0.2.3.9-alpha.
22393 - Issue a warning when running with the bufferevents backend enabled.
22394 It's still not stable, and people should know that they're likely
22395 to hit unexpected problems. Closes ticket 9147.
22398 Changes in version 0.2.4.14-alpha - 2013-06-18
22399 Tor 0.2.4.14-alpha fixes a pair of client guard enumeration problems
22400 present in 0.2.4.13-alpha.
22403 - When we have too much memory queued in circuits (according to a new
22404 MaxMemInCellQueues option), close the circuits consuming the most
22405 memory. This prevents us from running out of memory as a relay if
22406 circuits fill up faster than they can be drained. Fixes bug 9063;
22407 bugfix on the 54th commit of Tor. This bug is a further fix beyond
22408 bug 6252, whose fix was merged into 0.2.3.21-rc.
22410 This change also fixes an earlier approach taken in 0.2.4.13-alpha,
22411 where we tried to solve this issue simply by imposing an upper limit
22412 on the number of queued cells for a single circuit. That approach
22413 proved to be problematic, since there are ways to provoke clients to
22414 send a number of cells in excess of any such reasonable limit. Fixes
22415 bug 9072; bugfix on 0.2.4.13-alpha.
22417 - Limit hidden service descriptors to at most ten introduction
22418 points, to slow one kind of guard enumeration. Fixes bug 9002;
22419 bugfix on 0.1.1.11-alpha.
22422 Changes in version 0.2.4.13-alpha - 2013-06-14
22423 Tor 0.2.4.13-alpha fixes a variety of potential remote crash
22424 vulnerabilities, makes socks5 username/password circuit isolation
22425 actually actually work (this time for sure!), and cleans up a bunch
22426 of other issues in preparation for a release candidate.
22428 o Major bugfixes (robustness):
22429 - Close any circuit that has too many cells queued on it. Fixes
22430 bug 9063; bugfix on the 54th commit of Tor. This bug is a further
22431 fix beyond bug 6252, whose fix was merged into 0.2.3.21-rc.
22432 - Prevent the get_freelists() function from running off the end of
22433 the list of freelists if it somehow gets an unrecognized
22434 allocation. Fixes bug 8844; bugfix on 0.2.0.16-alpha. Reported by
22436 - Avoid an assertion failure on OpenBSD (and perhaps other BSDs)
22437 when an exit connection with optimistic data succeeds immediately
22438 rather than returning EINPROGRESS. Fixes bug 9017; bugfix on
22440 - Fix a directory authority crash bug when building a consensus
22441 using an older consensus as its basis. Fixes bug 8833. Bugfix
22445 - Avoid a memory leak where we would leak a consensus body when we
22446 find that a consensus which we couldn't previously verify due to
22447 missing certificates is now verifiable. Fixes bug 8719; bugfix
22449 - We used to always request authority certificates by identity digest,
22450 meaning we'd get the newest one even when we wanted one with a
22451 different signing key. Then we would complain about being given
22452 a certificate we already had, and never get the one we really
22453 wanted. Now we use the "fp-sk/" resource as well as the "fp/"
22454 resource to request the one we want. Fixes bug 5595; bugfix on
22456 - Follow the socks5 protocol when offering username/password
22457 authentication. The fix for bug 8117 exposed this bug, and it
22458 turns out real-world applications like Pidgin do care. Bugfix on
22459 0.2.3.2-alpha; fixes bug 8879.
22460 - Prevent failures on Windows Vista and later when rebuilding the
22461 microdescriptor cache. Diagnosed by Robert Ransom. Fixes bug 8822;
22462 bugfix on 0.2.4.12-alpha.
22465 - Fix an impossible buffer overrun in the AES unit tests. Fixes
22466 bug 8845; bugfix on 0.2.0.7-alpha. Found by eugenis.
22467 - If for some reason we fail to write a microdescriptor while
22468 rebuilding the cache, do not let the annotations from that
22469 microdescriptor linger in the cache file, and do not let the
22470 microdescriptor stay recorded as present in its old location.
22471 Fixes bug 9047; bugfix on 0.2.2.6-alpha.
22472 - Fix a memory leak that would occur whenever a configuration
22473 option changed. Fixes bug 8718; bugfix on 0.2.3.3-alpha.
22474 - Paste the description for PathBias parameters from the man
22475 page into or.h, so the code documents them too. Fixes bug 7982;
22476 bugfix on 0.2.3.17-beta and 0.2.4.8-alpha.
22477 - Relays now treat a changed IPv6 ORPort as sufficient reason to
22478 publish an updated descriptor. Fixes bug 6026; bugfix on
22480 - When launching a resolve request on behalf of an AF_UNIX control
22481 socket, omit the address field of the new entry connection, used in
22482 subsequent controller events, rather than letting tor_dup_addr()
22483 set it to "<unknown address type>". Fixes bug 8639; bugfix on
22486 o Minor bugfixes (log messages):
22487 - Fix a scaling issue in the path bias accounting code that
22488 resulted in "Bug:" log messages from either
22489 pathbias_scale_close_rates() or pathbias_count_build_success().
22490 This represents a bugfix on a previous bugfix: the original fix
22491 attempted in 0.2.4.10-alpha was incomplete. Fixes bug 8235; bugfix
22493 - Give a less useless error message when the user asks for an IPv4
22494 address on an IPv6-only port, or vice versa. Fixes bug 8846; bugfix
22498 - Downgrade "unexpected SENDME" warnings to protocol-warn for 0.2.4.x,
22499 to tolerate bug 8093 for now.
22500 - Add an "ignoring-advertised-bws" boolean to the flag-threshold lines
22501 in directory authority votes to describe whether they have enough
22502 measured bandwidths to ignore advertised (relay descriptor)
22503 bandwidth claims. Resolves ticket 8711.
22504 - Update to the June 5 2013 Maxmind GeoLite Country database.
22506 o Removed documentation:
22507 - Remove some of the older contents of doc/ as obsolete; move others
22508 to torspec.git. Fixes bug 8965.
22510 o Code simplification and refactoring:
22511 - Avoid using character buffers when constructing most directory
22512 objects: this approach was unwieldy and error-prone. Instead,
22513 build smartlists of strings, and concatenate them when done.
22516 Changes in version 0.2.4.12-alpha - 2013-04-18
22517 Tor 0.2.4.12-alpha moves Tor forward on several fronts: it starts the
22518 process for lengthening the guard rotation period, makes directory
22519 authority opinions in the consensus a bit less gameable, makes socks5
22520 username/password circuit isolation actually work, and fixes a wide
22521 variety of other issues.
22524 - Raise the default time that a client keeps an entry guard from
22525 "1-2 months" to "2-3 months", as suggested by Tariq Elahi's WPES
22526 2012 paper. (We would make it even longer, but we need better client
22527 load balancing first.) Also, make the guard lifetime controllable
22528 via a new GuardLifetime torrc option and a GuardLifetime consensus
22529 parameter. Start of a fix for bug 8240; bugfix on 0.1.1.11-alpha.
22530 - Directory authorities now prefer using measured bandwidths to
22531 advertised ones when computing flags and thresholds. Resolves
22533 - Directory authorities that have more than a threshold number
22534 of relays with measured bandwidths now treat relays with unmeasured
22535 bandwidths as having bandwidth 0. Resolves ticket 8435.
22537 o Major bugfixes (assert / resource use):
22538 - Avoid a bug where our response to TLS renegotiation under certain
22539 network conditions could lead to a busy-loop, with 100% CPU
22540 consumption. Fixes bug 5650; bugfix on 0.2.0.16-alpha.
22541 - Avoid an assertion when we discover that we'd like to write a cell
22542 onto a closing connection: just discard the cell. Fixes another
22543 case of bug 7350; bugfix on 0.2.4.4-alpha.
22545 o Major bugfixes (client-side privacy):
22546 - When we mark a circuit as unusable for new circuits, have it
22547 continue to be unusable for new circuits even if MaxCircuitDirtiness
22548 is increased too much at the wrong time, or the system clock jumps
22549 backwards. Fixes bug 6174; bugfix on 0.0.2pre26.
22550 - If ClientDNSRejectInternalAddresses ("do not believe DNS queries
22551 which have resolved to internal addresses") is set, apply that
22552 rule to IPv6 as well. Fixes bug 8475; bugfix on 0.2.0.7-alpha.
22553 - When an exit relay rejects a stream with reason "exit policy", but
22554 we only know an exit policy summary (e.g. from the microdesc
22555 consensus) for it, do not mark the relay as useless for all exiting.
22556 Instead, mark just the circuit as unsuitable for that particular
22557 address. Fixes part of bug 7582; bugfix on 0.2.3.2-alpha.
22558 - Allow applications to get proper stream isolation with
22559 IsolateSOCKSAuth. Many SOCKS5 clients that want to offer
22560 username/password authentication also offer "no authentication". Tor
22561 had previously preferred "no authentication", so the applications
22562 never actually sent Tor their auth details. Now Tor selects
22563 username/password authentication if it's offered. You can disable
22564 this behavior on a per-SOCKSPort basis via PreferSOCKSNoAuth. Fixes
22565 bug 8117; bugfix on 0.2.3.3-alpha.
22567 o Major bugfixes (other):
22568 - When unable to find any working directory nodes to use as a
22569 directory guard, give up rather than adding the same non-working
22570 nodes to the directory guard list over and over. Fixes bug 8231;
22571 bugfix on 0.2.4.8-alpha.
22574 - Reject as invalid most directory objects containing a NUL.
22575 Belt-and-suspender fix for bug 8037.
22576 - In our testsuite, create temporary directories with a bit more
22577 entropy in their name to make name collisions less likely. Fixes
22579 - Add CACHED keyword to ADDRMAP events in the control protocol
22580 to indicate whether a DNS result will be cached or not. Resolves
22582 - Update to the April 3 2013 Maxmind GeoLite Country database.
22584 o Minor features (build):
22585 - Detect and reject attempts to build Tor with threading support
22586 when OpenSSL has been compiled without threading support.
22588 - Clarify that when autoconf is checking for nacl, it is checking
22589 specifically for nacl with a fast curve25519 implementation.
22591 - Warn if building on a platform with an unsigned time_t: there
22592 are too many places where Tor currently assumes that time_t can
22593 hold negative values. We'd like to fix them all, but probably
22596 o Minor bugfixes (build):
22597 - Fix some bugs in tor-fw-helper-natpmp when trying to build and
22598 run it on Windows. More bugs likely remain. Patch from Gisle Vanem.
22599 Fixes bug 7280; bugfix on 0.2.3.1-alpha.
22600 - Add the old src/or/micro-revision.i filename to CLEANFILES.
22601 On the off chance that somebody has one, it will go away as soon
22602 as they run "make clean". Fix for bug 7143; bugfix on 0.2.4.1-alpha.
22603 - Build Tor correctly on 32-bit platforms where the compiler can build
22604 but not run code using the "uint128_t" construction. Fixes bug 8587;
22605 bugfix on 0.2.4.8-alpha.
22606 - Fix compilation warning with some versions of clang that would
22607 prefer the -Wswitch-enum compiler flag to warn about switch
22608 statements with missing enum values, even if those switch
22609 statements have a "default:" statement. Fixes bug 8598; bugfix
22612 o Minor bugfixes (protocol):
22613 - Fix the handling of a TRUNCATE cell when it arrives while the
22614 circuit extension is in progress. Fixes bug 7947; bugfix on 0.0.7.1.
22615 - Fix a misframing issue when reading the version numbers in a
22616 VERSIONS cell. Previously we would recognize [00 01 00 02] as
22617 'version 1, version 2, and version 0x100', when it should have
22618 only included versions 1 and 2. Fixes bug 8059; bugfix on
22619 0.2.0.10-alpha. Reported pseudonymously.
22620 - Make the format and order of STREAM events for DNS lookups
22621 consistent among the various ways to launch DNS lookups. Fixes
22622 bug 8203; bugfix on 0.2.0.24-rc. Patch by "Desoxy".
22623 - Correct our check for which versions of Tor support the EXTEND2
22624 cell. We had been willing to send it to Tor 0.2.4.7-alpha and
22625 later, when support was really added in version 0.2.4.8-alpha.
22626 Fixes bug 8464; bugfix on 0.2.4.8-alpha.
22628 o Minor bugfixes (other):
22629 - Correctly store microdescriptors and extrainfo descriptors with
22630 an internal NUL byte. Fixes bug 8037; bugfix on 0.2.0.1-alpha.
22631 Bug reported by "cypherpunks".
22632 - Increase the width of the field used to remember a connection's
22633 link protocol version to two bytes. Harmless for now, since the
22634 only currently recognized versions are one byte long. Reported
22635 pseudonymously. Fixes bug 8062; bugfix on 0.2.0.10-alpha.
22636 - If the state file's path bias counts are invalid (presumably from a
22637 buggy Tor prior to 0.2.4.10-alpha), make them correct. Also add
22638 additional checks and log messages to the scaling of Path Bias
22639 counts, in case there still are remaining issues with scaling.
22640 Should help resolve bug 8235.
22641 - Eliminate several instances where we use "Nickname=ID" to refer to
22642 nodes in logs. Use "Nickname (ID)" instead. (Elsewhere, we still use
22643 "$ID=Nickname", which is also acceptable.) Fixes bug 7065. Bugfix
22644 on 0.2.3.21-rc, 0.2.4.5-alpha, 0.2.4.8-alpha, and 0.2.4.10-alpha.
22646 o Minor bugfixes (syscalls):
22647 - Always check the return values of functions fcntl() and
22648 setsockopt(). We don't believe these are ever actually failing in
22649 practice, but better safe than sorry. Also, checking these return
22650 values should please analysis tools like Coverity. Patch from
22651 'flupzor'. Fixes bug 8206; bugfix on all versions of Tor.
22652 - Use direct writes rather than stdio when building microdescriptor
22653 caches, in an attempt to mitigate bug 8031, or at least make it
22656 o Minor bugfixes (config):
22657 - When rejecting a configuration because we were unable to parse a
22658 quoted string, log an actual error message. Fixes bug 7950; bugfix
22660 - Behave correctly when the user disables LearnCircuitBuildTimeout
22661 but doesn't tell us what they would like the timeout to be. Fixes
22662 bug 6304; bugfix on 0.2.2.14-alpha.
22663 - When autodetecting the number of CPUs, use the number of available
22664 CPUs in preference to the number of configured CPUs. Inform the
22665 user if this reduces the number of available CPUs. Fixes bug 8002;
22666 bugfix on 0.2.3.1-alpha.
22667 - Make it an error when you set EntryNodes but disable UseGuardNodes,
22668 since it will (surprisingly to some users) ignore EntryNodes. Fixes
22669 bug 8180; bugfix on 0.2.3.11-alpha.
22670 - Allow TestingTorNetworks to override the 4096-byte minimum for
22671 the Fast threshold. Otherwise they can't bootstrap until they've
22672 observed more traffic. Fixes bug 8508; bugfix on 0.2.4.10-alpha.
22673 - Fix some logic errors when the user manually overrides the
22674 PathsNeededToBuildCircuits option in torrc. Fixes bug 8599; bugfix
22677 o Minor bugfixes (log messages to help diagnose bugs):
22678 - If we fail to free a microdescriptor because of bug 7164, log
22679 the filename and line number from which we tried to free it.
22680 - Add another diagnostic to the heartbeat message: track and log
22681 overhead that TLS is adding to the data we write. If this is
22682 high, we are sending too little data to SSL_write at a time.
22683 Diagnostic for bug 7707.
22684 - Add more detail to a log message about relaxed timeouts, to help
22686 - Warn more aggressively when flushing microdescriptors to a
22687 microdescriptor cache fails, in an attempt to mitigate bug 8031,
22688 or at least make it more diagnosable.
22689 - Improve debugging output to help track down bug 8185 ("Bug:
22690 outgoing relay cell has n_chan==NULL. Dropping.")
22691 - Log the purpose of a path-bias testing circuit correctly.
22692 Improves a log message from bug 8477; bugfix on 0.2.4.8-alpha.
22694 o Minor bugfixes (0.2.4.x log messages that were too noisy):
22695 - Don't attempt to relax the timeout of already opened 1-hop circuits.
22696 They might never timeout. This should eliminate some/all cases of
22697 the relaxed timeout log message.
22698 - Use circuit creation time for network liveness evaluation. This
22699 should eliminate warning log messages about liveness caused
22700 by changes in timeout evaluation. Fixes bug 6572; bugfix on
22702 - Reduce a path bias length check from notice to info. The message
22703 is triggered when creating controller circuits. Fixes bug 8196;
22704 bugfix on 0.2.4.8-alpha.
22705 - Fix a path state issue that triggered a notice during relay startup.
22706 Fixes bug 8320; bugfix on 0.2.4.10-alpha.
22707 - Reduce occurrences of warns about circuit purpose in
22708 connection_ap_expire_building(). Fixes bug 8477; bugfix on
22711 o Minor bugfixes (pre-0.2.4.x log messages that were too noisy):
22712 - If we encounter a write failure on a SOCKS connection before we
22713 finish our SOCKS handshake, don't warn that we closed the
22714 connection before we could send a SOCKS reply. Fixes bug 8427;
22715 bugfix on 0.1.0.1-rc.
22716 - Correctly recognize that [::1] is a loopback address. Fixes
22717 bug 8377; bugfix on 0.2.1.3-alpha.
22718 - Fix a directory authority warn caused when we have a large amount
22719 of badexit bandwidth. Fixes bug 8419; bugfix on 0.2.2.10-alpha.
22720 - Don't log inappropriate heartbeat messages when hibernating: a
22721 hibernating node is _expected_ to drop out of the consensus,
22722 decide it isn't bootstrapped, and so forth. Fixes bug 7302;
22723 bugfix on 0.2.3.1-alpha.
22724 - Don't complain about bootstrapping problems while hibernating.
22725 These complaints reflect a general code problem, but not one
22726 with any problematic effects (no connections are actually
22727 opened). Fixes part of bug 7302; bugfix on 0.2.3.2-alpha.
22729 o Documentation fixes:
22730 - Update tor-fw-helper.1.txt and tor-fw-helper.c to make option
22731 names match. Fixes bug 7768.
22732 - Make the torify manpage no longer refer to tsocks; torify hasn't
22733 supported tsocks since 0.2.3.14-alpha.
22734 - Make the tor manpage no longer reference tsocks.
22735 - Fix the GeoIPExcludeUnknown documentation to refer to
22736 ExcludeExitNodes rather than the currently nonexistent
22737 ExcludeEntryNodes. Spotted by "hamahangi" on tor-talk.
22740 - The tor-tsocks.conf is no longer distributed or installed. We
22741 recommend that tsocks users use torsocks instead. Resolves
22745 Changes in version 0.2.4.11-alpha - 2013-03-11
22746 Tor 0.2.4.11-alpha makes relay measurement by directory authorities
22747 more robust, makes hidden service authentication work again, and
22748 resolves a DPI fingerprint for Tor's SSL transport.
22750 o Major features (directory authorities):
22751 - Directory authorities now support a new consensus method (17)
22752 where they cap the published bandwidth of servers for which
22753 insufficient bandwidth measurements exist. Fixes part of bug 2286.
22754 - Directory authorities that set "DisableV2DirectoryInfo_ 1" no longer
22755 serve any v2 directory information. Now we can test disabling the
22756 old deprecated v2 directory format, and see whether doing so has
22757 any effect on network load. Begins to fix bug 6783.
22758 - Directory authorities now include inside each vote a statement of
22759 the performance thresholds they used when assigning flags.
22760 Implements ticket 8151.
22762 o Major bugfixes (directory authorities):
22763 - Stop marking every relay as having been down for one hour every
22764 time we restart a directory authority. These artificial downtimes
22765 were messing with our Stable and Guard flag calculations. Fixes
22766 bug 8218 (introduced by the fix for 1035). Bugfix on 0.2.2.23-alpha.
22768 o Major bugfixes (hidden services):
22769 - Allow hidden service authentication to succeed again. When we
22770 refactored the hidden service introduction code back
22771 in 0.2.4.1-alpha, we didn't update the code that checks
22772 whether authentication information is present, causing all
22773 authentication checks to return "false". Fix for bug 8207; bugfix
22774 on 0.2.4.1-alpha. Found by Coverity; this is CID 718615.
22776 o Minor features (relays, bridges):
22777 - Make bridge relays check once a minute for whether their IP
22778 address has changed, rather than only every 15 minutes. Resolves
22779 bugs 1913 and 1992.
22780 - Refactor resolve_my_address() so it returns the method by which we
22781 decided our public IP address (explicitly configured, resolved from
22782 explicit hostname, guessed from interfaces, learned by gethostname).
22783 Now we can provide more helpful log messages when a relay guesses
22784 its IP address incorrectly (e.g. due to unexpected lines in
22785 /etc/hosts). Resolves ticket 2267.
22786 - Teach bridge-using clients to avoid 0.2.2 bridges when making
22787 microdescriptor-related dir requests, and only fall back to normal
22788 descriptors if none of their bridges can handle microdescriptors
22789 (as opposed to the fix in ticket 4013, which caused them to fall
22790 back to normal descriptors if *any* of their bridges preferred
22791 them). Resolves ticket 4994.
22792 - Randomize the lifetime of our SSL link certificate, so censors can't
22793 use the static value for filtering Tor flows. Resolves ticket 8443;
22794 related to ticket 4014 which was included in 0.2.2.33.
22795 - Support a new version of the link protocol that allows 4-byte circuit
22796 IDs. Previously, circuit IDs were limited to 2 bytes, which presented
22797 a possible resource exhaustion issue. Closes ticket 7351; implements
22800 o Minor features (portability):
22801 - Tweak the curve25519-donna*.c implementations to tolerate systems
22802 that lack stdint.h. Fixes bug 3894; bugfix on 0.2.4.8-alpha.
22803 - Use Ville Laurikari's implementation of AX_CHECK_SIGN() to determine
22804 the signs of types during autoconf. This is better than our old
22805 approach, which didn't work when cross-compiling.
22806 - Detect the sign of enum values, rather than assuming that MSC is the
22807 only compiler where enum types are all signed. Fixes bug 7727;
22808 bugfix on 0.2.4.10-alpha.
22810 o Minor features (other):
22811 - Say "KBytes" rather than "KB" in the man page (for various values
22812 of K), to further reduce confusion about whether Tor counts in
22813 units of memory or fractions of units of memory. Resolves ticket 7054.
22814 - Clear the high bit on curve25519 public keys before passing them to
22815 our backend, in case we ever wind up using a backend that doesn't do
22816 so itself. If we used such a backend, and *didn't* clear the high bit,
22817 we could wind up in a situation where users with such backends would
22818 be distinguishable from users without. Fixes bug 8121; bugfix on
22820 - Update to the March 6 2013 Maxmind GeoLite Country database.
22822 o Minor bugfixes (clients):
22823 - When we receive a RELAY_END cell with the reason DONE, or with no
22824 reason, before receiving a RELAY_CONNECTED cell, report the SOCKS
22825 status as "connection refused". Previously we reported these cases
22826 as success but then immediately closed the connection. Fixes bug
22827 7902; bugfix on 0.1.0.1-rc. Reported by "oftc_must_be_destroyed".
22828 - Downgrade an assertion in connection_ap_expire_beginning to an
22829 LD_BUG message. The fix for bug 8024 should prevent this message
22830 from displaying, but just in case, a warn that we can diagnose
22831 is better than more assert crashes. Fixes bug 8065; bugfix on
22833 - Lower path use bias thresholds to .80 for notice and .60 for warn.
22834 Also make the rate limiting flags for the path use bias log messages
22835 independent from the original path bias flags. Fixes bug 8161;
22836 bugfix on 0.2.4.10-alpha.
22838 o Minor bugfixes (relays):
22839 - Stop trying to resolve our hostname so often (e.g. every time we
22840 think about doing a directory fetch). Now we reuse the cached
22841 answer in some cases. Fixes bugs 1992 (bugfix on 0.2.0.20-rc)
22842 and 2410 (bugfix on 0.1.2.2-alpha).
22843 - Stop sending a stray "(null)" in some cases for the server status
22844 "EXTERNAL_ADDRESS" controller event. Resolves bug 8200; bugfix
22846 - When choosing which stream on a formerly stalled circuit to wake
22847 first, make better use of the platform's weak RNG. Previously,
22848 we had been using the % ("modulo") operator to try to generate a
22849 1/N chance of picking each stream, but this behaves badly with
22850 many platforms' choice of weak RNG. Fixes bug 7801; bugfix on
22852 - Use our own weak RNG when we need a weak RNG. Windows's rand() and
22853 Irix's random() only return 15 bits; Solaris's random() returns more
22854 bits but its RAND_MAX says it only returns 15, and so on. Motivated
22855 by the fix for bug 7801; bugfix on 0.2.2.20-alpha.
22857 o Minor bugfixes (directory authorities):
22858 - Directory authorities now use less space when formatting identical
22859 microdescriptor lines in directory votes. Fixes bug 8158; bugfix
22862 o Minor bugfixes (memory leaks spotted by Coverity -- bug 7816):
22863 - Avoid leaking memory if we fail to compute a consensus signature
22864 or we generate a consensus we can't parse. Bugfix on 0.2.0.5-alpha.
22865 - Fix a memory leak when receiving headers from an HTTPS proxy. Bugfix
22867 - Fix a memory leak during safe-cookie controller authentication.
22868 Bugfix on 0.2.3.13-alpha.
22869 - Avoid memory leak of IPv6 policy content if we fail to format it into
22870 a router descriptor. Bugfix on 0.2.4.7-alpha.
22872 o Minor bugfixes (other code correctness issues):
22873 - Avoid a crash if we fail to generate an extrainfo descriptor.
22874 Fixes bug 8208; bugfix on 0.2.3.16-alpha. Found by Coverity;
22875 this is CID 718634.
22876 - When detecting the largest possible file descriptor (in order to
22877 close all file descriptors when launching a new program), actually
22878 use _SC_OPEN_MAX. The old code for doing this was very, very broken.
22879 Fixes bug 8209; bugfix on 0.2.3.1-alpha. Found by Coverity; this
22881 - Fix a copy-and-paste error when adding a missing A1 to a routerset
22882 because of GeoIPExcludeUnknown. Fix for Coverity CID 980650.
22883 Bugfix on 0.2.4.10-alpha.
22884 - Fix an impossible-to-trigger integer overflow when estimating how
22885 long our onionskin queue would take. (This overflow would require us
22886 to accept 4 million onionskins before processing 100 of them.) Fixes
22887 bug 8210; bugfix on 0.2.4.10-alpha.
22889 o Code simplification and refactoring:
22890 - Add a wrapper function for the common "log a message with a
22894 Changes in version 0.2.4.10-alpha - 2013-02-04
22895 Tor 0.2.4.10-alpha adds defenses at the directory authority level from
22896 certain attacks that flood the network with relays; changes the queue
22897 for circuit create requests from a sized-based limit to a time-based
22898 limit; resumes building with MSVC on Windows; and fixes a wide variety
22901 o Major bugfixes (directory authority):
22902 - When computing directory thresholds, ignore any rejected-as-sybil
22903 nodes during the computation so that they can't influence Fast,
22904 Guard, etc. (We should have done this for proposal 109.) Fixes
22906 - When marking a node as a likely sybil, reset its uptime metrics
22907 to zero, so that it cannot time towards getting marked as Guard,
22908 Stable, or HSDir. (We should have done this for proposal 109.) Fixes
22912 - When a TLS write is partially successful but incomplete, remember
22913 that the flushed part has been flushed, and notice that bytes were
22914 actually written. Reported and fixed pseudonymously. Fixes bug
22915 7708; bugfix on Tor 0.1.0.5-rc.
22916 - Reject bogus create and relay cells with 0 circuit ID or 0 stream
22917 ID: these could be used to create unexpected streams and circuits
22918 which would count as "present" to some parts of Tor but "absent"
22919 to others, leading to zombie circuits and streams or to a bandwidth
22920 denial-of-service. Fixes bug 7889; bugfix on every released version
22921 of Tor. Reported by "oftc_must_be_destroyed".
22922 - Rename all macros in our local copy of queue.h to begin with "TOR_".
22923 This change seems the only good way to permanently prevent conflicts
22924 with queue.h on various operating systems. Fixes bug 8107; bugfix
22927 o Major features (relay):
22928 - Instead of limiting the number of queued onionskins (aka circuit
22929 create requests) to a fixed, hard-to-configure number, we limit
22930 the size of the queue based on how many we expect to be able to
22931 process in a given amount of time. We estimate the time it will
22932 take to process an onionskin based on average processing time
22933 of previous onionskins. Closes ticket 7291. You'll never have to
22934 configure MaxOnionsPending again.
22936 o Major features (portability):
22937 - Resume building correctly with MSVC and Makefile.nmake. This patch
22938 resolves numerous bugs and fixes reported by ultramage, including
22939 7305, 7308, 7309, 7310, 7312, 7313, 7315, 7316, and 7669.
22940 - Make the ntor and curve25519 code build correctly with MSVC.
22941 Fix on 0.2.4.8-alpha.
22944 - When directory authorities are computing thresholds for flags,
22945 never let the threshold for the Fast flag fall below 4096
22946 bytes. Also, do not consider nodes with extremely low bandwidths
22947 when deciding thresholds for various directory flags. This change
22948 should raise our threshold for Fast relays, possibly in turn
22949 improving overall network performance; see ticket 1854. Resolves
22951 - The Tor client now ignores sub-domain components of a .onion
22952 address. This change makes HTTP "virtual" hosting
22953 possible: http://foo.aaaaaaaaaaaaaaaa.onion/ and
22954 http://bar.aaaaaaaaaaaaaaaa.onion/ can be two different websites
22955 hosted on the same hidden service. Implements proposal 204.
22956 - We compute the overhead from passing onionskins back and forth to
22957 cpuworkers, and report it when dumping statistics in response to
22958 SIGUSR1. Supports ticket 7291.
22960 o Minor features (path selection):
22961 - When deciding whether we have enough descriptors to build circuits,
22962 instead of looking at raw relay counts, look at which fraction
22963 of (bandwidth-weighted) paths we're able to build. This approach
22964 keeps clients from building circuits if their paths are likely to
22965 stand out statistically. The default fraction of paths needed is
22966 taken from the consensus directory; you can override it with the
22967 new PathsNeededToBuildCircuits option. Fixes ticket 5956.
22968 - When any country code is listed in ExcludeNodes or ExcludeExitNodes,
22969 and we have GeoIP information, also exclude all nodes with unknown
22970 countries "??" and "A1". This behavior is controlled by the
22971 new GeoIPExcludeUnknown option: you can make such nodes always
22972 excluded with "GeoIPExcludeUnknown 1", and disable the feature
22973 with "GeoIPExcludeUnknown 0". Setting "GeoIPExcludeUnknown auto"
22974 gets you the default behavior. Implements feature 7706.
22975 - Path Use Bias: Perform separate accounting for successful circuit
22976 use. Keep separate statistics on stream attempt rates versus stream
22977 success rates for each guard. Provide configurable thresholds to
22978 determine when to emit log messages or disable use of guards that
22979 fail too many stream attempts. Resolves ticket 7802.
22981 o Minor features (log messages):
22982 - When learning a fingerprint for a bridge, log its corresponding
22983 transport type. Implements ticket 7896.
22984 - Improve the log message when "Bug/attack: unexpected sendme cell
22985 from client" occurs, to help us track bug 8093.
22988 - Remove a couple of extraneous semicolons that were upsetting the
22989 cparser library. Patch by Christian Grothoff. Fixes bug 7115;
22990 bugfix on 0.2.2.1-alpha.
22991 - Remove a source of rounding error during path bias count scaling;
22992 don't count cannibalized circuits as used for path bias until we
22993 actually try to use them; and fix a circuit_package_relay_cell()
22994 warning message about n_chan==NULL. Fixes bug 7802.
22995 - Detect nacl when its headers are in a nacl/ subdirectory. Also,
22996 actually link against nacl when we're configured to use it. Fixes
22997 bug 7972; bugfix on 0.2.4.8-alpha.
22998 - Compile correctly with the --disable-curve25519 option. Fixes
22999 bug 8153; bugfix on 0.2.4.8-alpha.
23001 o Build improvements:
23002 - Do not report status verbosely from autogen.sh unless the -v flag
23003 is specified. Fixes issue 4664. Patch from Onizuka.
23004 - Replace all calls to snprintf() outside of src/ext with
23005 tor_snprintf(). Also remove the #define to replace snprintf with
23006 _snprintf on Windows; they have different semantics, and all of
23007 our callers should be using tor_snprintf() anyway. Fixes bug 7304.
23008 - Try to detect if we are ever building on a platform where
23009 memset(...,0,...) does not set the value of a double to 0.0. Such
23010 platforms are permitted by the C standard, though in practice
23011 they're pretty rare (since IEEE 754 is nigh-ubiquitous). We don't
23012 currently support them, but it's better to detect them and fail
23013 than to perform erroneously.
23015 o Removed features:
23016 - Stop exporting estimates of v2 and v3 directory traffic shares
23017 in extrainfo documents. They were unneeded and sometimes inaccurate.
23018 Also stop exporting any v2 directory request statistics. Resolves
23020 - Drop support for detecting and warning about versions of Libevent
23021 before 1.3e. Nothing reasonable ships with them any longer;
23022 warning the user about them shouldn't be needed. Resolves ticket
23025 o Code simplifications and refactoring:
23026 - Rename "isin" functions to "contains", for grammar. Resolves
23028 - Rename Tor's logging function log() to tor_log(), to avoid conflicts
23029 with the natural logarithm function from the system libm. Resolves
23033 Changes in version 0.2.4.9-alpha - 2013-01-15
23034 Tor 0.2.4.9-alpha provides a quick fix to make the new ntor handshake
23035 work more robustly.
23038 - Fix backward compatibility logic when receiving an embedded ntor
23039 handshake tunneled in a CREATE cell. This clears up the "Bug:
23040 couldn't format CREATED cell" warning. Fixes bug 7959; bugfix
23044 Changes in version 0.2.4.8-alpha - 2013-01-14
23045 Tor 0.2.4.8-alpha introduces directory guards to reduce user enumeration
23046 risks, adds a new stronger and faster circuit handshake, and offers
23047 stronger and faster link encryption when both sides support it.
23050 - Preliminary support for directory guards (proposal 207): when
23051 possible, clients now use their entry guards for non-anonymous
23052 directory requests. This can help prevent client enumeration. Note
23053 that this behavior only works when we have a usable consensus
23054 directory, and when options about what to download are more or less
23055 standard. In the future we should re-bootstrap from our guards,
23056 rather than re-bootstrapping from the preconfigured list of
23057 directory sources that ships with Tor. Resolves ticket 6526.
23058 - Tor relays and clients now support a better CREATE/EXTEND cell
23059 format, allowing the sender to specify multiple address, identity,
23060 and handshake types. Implements Robert Ransom's proposal 200;
23061 closes ticket 7199.
23063 o Major features (new circuit handshake):
23064 - Tor now supports a new circuit extension handshake designed by Ian
23065 Goldberg, Douglas Stebila, and Berkant Ustaoglu. Our original
23066 circuit extension handshake, later called "TAP", was a bit slow
23067 (especially on the relay side), had a fragile security proof, and
23068 used weaker keys than we'd now prefer. The new circuit handshake
23069 uses Dan Bernstein's "curve25519" elliptic-curve Diffie-Hellman
23070 function, making it significantly more secure than the older
23071 handshake, and significantly faster. Tor can use one of two built-in
23072 pure-C curve25519-donna implementations by Adam Langley, or it
23073 can link against the "nacl" library for a tuned version if present.
23075 The built-in version is very fast for 64-bit systems when building
23076 with GCC. The built-in 32-bit version is still faster than the
23077 old TAP protocol, but using libnacl is better on most such hosts.
23079 Clients don't currently use this protocol by default, since
23080 comparatively few clients support it so far. To try it, set
23081 UseNTorHandshake to 1.
23083 Implements proposal 216; closes ticket 7202.
23085 o Major features (better link encryption):
23086 - Relays can now enable the ECDHE TLS ciphersuites when available
23087 and appropriate. These ciphersuites let us negotiate forward-secure
23088 TLS secret keys more safely and more efficiently than with our
23089 previous use of Diffie-Hellman modulo a 1024-bit prime. By default,
23090 public relays prefer the (faster) P224 group, and bridges prefer
23091 the (more common) P256 group; you can override this with the
23094 Enabling these ciphers was a little tricky, since for a long time,
23095 clients had been claiming to support them without actually doing
23096 so, in order to foil fingerprinting. But with the client-side
23097 implementation of proposal 198 in 0.2.3.17-beta, clients can now
23098 match the ciphers from recent Firefox versions *and* list the
23099 ciphers they actually mean, so relays can believe such clients
23100 when they advertise ECDHE support in their TLS ClientHello messages.
23102 This feature requires clients running 0.2.3.17-beta or later,
23103 and requires both sides to be running OpenSSL 1.0.0 or later
23104 with ECC support. OpenSSL 1.0.1, with the compile-time option
23105 "enable-ec_nistp_64_gcc_128", is highly recommended.
23107 Implements the relay side of proposal 198; closes ticket 7200.
23110 - Avoid crashing when, as a relay without IPv6-exit support, a
23111 client insists on getting an IPv6 address or nothing. Fixes bug
23112 7814; bugfix on 0.2.4.7-alpha.
23115 - Improve circuit build timeout handling for hidden services.
23116 In particular: adjust build timeouts more accurately depending
23117 upon the number of hop-RTTs that a particular circuit type
23118 undergoes. Additionally, launch intro circuits in parallel
23119 if they timeout, and take the first one to reply as valid.
23120 - Work correctly on Unix systems where EAGAIN and EWOULDBLOCK are
23121 separate error codes; or at least, don't break for that reason.
23122 Fixes bug 7935. Reported by "oftc_must_be_destroyed".
23123 - Update to the January 2 2013 Maxmind GeoLite Country database.
23125 o Minor features (testing):
23126 - Add benchmarks for DH (1024-bit multiplicative group) and ECDH
23127 (P-256) Diffie-Hellman handshakes to src/or/bench.
23128 - Add benchmark functions to test onion handshake performance.
23130 o Minor features (path bias detection):
23131 - Alter the Path Bias log messages to be more descriptive in terms
23132 of reporting timeouts and other statistics.
23133 - Create three levels of Path Bias log messages, as opposed to just
23134 two. These are configurable via consensus as well as via the torrc
23135 options PathBiasNoticeRate, PathBiasWarnRate, PathBiasExtremeRate.
23136 The default values are 0.70, 0.50, and 0.30 respectively.
23137 - Separate the log message levels from the decision to drop guards,
23138 which also is available via torrc option PathBiasDropGuards.
23139 PathBiasDropGuards still defaults to 0 (off).
23140 - Deprecate PathBiasDisableRate in favor of PathBiasDropGuards
23141 in combination with PathBiasExtremeRate.
23142 - Increase the default values for PathBiasScaleThreshold and
23143 PathBiasCircThreshold from (200, 20) to (300, 150).
23144 - Add in circuit usage accounting to path bias. If we try to use a
23145 built circuit but fail for any reason, it counts as path bias.
23146 Certain classes of circuits where the adversary gets to pick your
23147 destination node are exempt from this accounting. Usage accounting
23148 can be specifically disabled via consensus parameter or torrc.
23149 - Convert all internal path bias state to double-precision floating
23150 point, to avoid roundoff error and other issues.
23151 - Only record path bias information for circuits that have completed
23152 *two* hops. Assuming end-to-end tagging is the attack vector, this
23153 makes us more resilient to ambient circuit failure without any
23154 detection capability loss.
23156 o Minor bugfixes (log messages):
23157 - Rate-limit the "No circuits are opened. Relaxed timeout for a
23158 circuit with channel state open..." message to once per hour to
23159 keep it from filling the notice logs. Mitigates bug 7799 but does
23160 not fix the underlying cause. Bugfix on 0.2.4.7-alpha.
23161 - Avoid spurious warnings when configuring multiple client ports of
23162 which only some are nonlocal. Previously, we had claimed that some
23163 were nonlocal when in fact they weren't. Fixes bug 7836; bugfix on
23166 o Code simplifications and refactoring:
23167 - Get rid of a couple of harmless clang warnings, where we compared
23168 enums to ints. These warnings are newly introduced in clang 3.2.
23169 - Split the onion.c file into separate modules for the onion queue
23170 and the different handshakes it supports.
23171 - Remove the marshalling/unmarshalling code for sending requests to
23172 cpuworkers over a socket, and instead just send structs. The
23173 recipient will always be the same Tor binary as the sender, so
23174 any encoding is overkill.
23177 Changes in version 0.2.4.7-alpha - 2012-12-24
23178 Tor 0.2.4.7-alpha introduces a new approach to providing fallback
23179 directory mirrors for more robust bootstrapping; fixes more issues where
23180 clients with changing network conditions refuse to make any circuits;
23181 adds initial support for exiting to IPv6 addresses; resumes being able
23182 to update our GeoIP database, and includes the geoip6 file this time;
23183 turns off the client-side DNS cache by default due to privacy risks;
23184 and fixes a variety of other issues.
23186 o Major features (client resilience):
23187 - Add a new "FallbackDir" torrc option to use when we can't use
23188 a directory mirror from the consensus (either because we lack a
23189 consensus, or because they're all down). Currently, all authorities
23190 are fallbacks by default, and there are no other default fallbacks,
23191 but that will change. This option will allow us to give clients a
23192 longer list of servers to try to get a consensus from when first
23193 connecting to the Tor network, and thereby reduce load on the
23194 directory authorities. Implements proposal 206, "Preconfigured
23195 directory sources for bootstrapping". We also removed the old
23196 "FallbackNetworkstatus" option, since we never got it working well
23197 enough to use it. Closes bug 572.
23198 - If we have no circuits open, use a relaxed timeout (the
23199 95-percentile cutoff) until a circuit succeeds. This heuristic
23200 should allow Tor to succeed at building circuits even when the
23201 network connection drastically changes. Should help with bug 3443.
23203 o Major features (IPv6):
23204 - Relays can now exit to IPv6 addresses: make sure that you have IPv6
23205 connectivity, then set the IPv6Exit flag to 1. Also make sure your
23206 exit policy reads as you would like: the address * applies to all
23207 address families, whereas *4 is IPv4 address only, and *6 is IPv6
23208 addresses only. On the client side, you'll need to wait until the
23209 authorities have upgraded, wait for enough exits to support IPv6,
23210 apply the "IPv6Traffic" flag to a SocksPort, and use Socks5. Closes
23211 ticket 5547, implements proposal 117 as revised in proposal 208.
23213 We DO NOT recommend that clients with actual anonymity needs start
23214 using IPv6 over Tor yet, since not enough exits support it yet.
23216 o Major features (geoip database):
23217 - Maxmind began labelling Tor relays as being in country "A1",
23218 which breaks by-country node selection inside Tor. Now we use a
23219 script to replace "A1" ("Anonymous Proxy") entries in our geoip
23220 file with real country codes. This script fixes about 90% of "A1"
23221 entries automatically and uses manual country code assignments to
23222 fix the remaining 10%. See src/config/README.geoip for details.
23223 Fixes bug 6266. Also update to the December 5 2012 Maxmind GeoLite
23224 Country database, as modified above.
23226 o Major bugfixes (client-side DNS):
23227 - Turn off the client-side DNS cache by default. Updating and using
23228 the DNS cache is now configurable on a per-client-port
23229 level. SOCKSPort, DNSPort, etc lines may now contain
23230 {No,}Cache{IPv4,IPv6,}DNS lines to indicate that we shouldn't
23231 cache these types of DNS answers when we receive them from an
23232 exit node in response to an application request on this port, and
23233 {No,}UseCached{IPv4,IPv6,DNS} lines to indicate that if we have
23234 cached DNS answers of these types, we shouldn't use them. It's
23235 potentially risky to use cached DNS answers at the client, since
23236 doing so can indicate to one exit what answers we've gotten
23237 for DNS lookups in the past. With IPv6, this becomes especially
23238 problematic. Using cached DNS answers for requests on the same
23239 circuit would present less linkability risk, since all traffic
23240 on a circuit is already linkable, but it would also provide
23241 little performance benefit: the exit node caches DNS replies
23242 too. Implements a simplified version of Proposal 205. Implements
23245 o Major bugfixes (other):
23246 - Alter circuit build timeout measurement to start at the point
23247 where we begin the CREATE/CREATE_FAST step (as opposed to circuit
23248 initialization). This should make our timeout measurements more
23249 uniform. Previously, we were sometimes including ORconn setup time
23250 in our circuit build time measurements. Should resolve bug 3443.
23251 - Fix an assertion that could trigger in hibernate_go_dormant() when
23252 closing an or_connection_t: call channel_mark_for_close() rather
23253 than connection_mark_for_close(). Fixes bug 7267. Bugfix on
23255 - Include the geoip6 IPv6 GeoIP database in the tarball. Fixes bug
23256 7655; bugfix on 0.2.4.6-alpha.
23259 - Add a new torrc option "ServerTransportListenAddr" to let bridge
23260 operators select the address where their pluggable transports will
23261 listen for connections. Resolves ticket 7013.
23262 - Allow an optional $ before the node identity digest in the
23263 controller command GETINFO ns/id/<identity>, for consistency with
23264 md/id/<identity> and desc/id/<identity>. Resolves ticket 7059.
23265 - Log packaged cell fullness as part of the heartbeat message.
23266 Diagnosis to try to determine the extent of bug 7743.
23268 o Minor features (IPv6):
23269 - AutomapHostsOnResolve now supports IPv6 addresses. By default, we
23270 prefer to hand out virtual IPv6 addresses, since there are more of
23271 them and we can't run out. To override this behavior and make IPv4
23272 addresses preferred, set NoPreferIPv6Automap on whatever SOCKSPort
23273 or DNSPort you're using for resolving. Implements ticket 7571.
23274 - AutomapHostsOnResolve responses are now randomized, to avoid
23275 annoying situations where Tor is restarted and applications
23276 connect to the wrong addresses.
23277 - Never try more than 1000 times to pick a new virtual address when
23278 AutomapHostsOnResolve is set. That's good enough so long as we
23279 aren't close to handing out our entire virtual address space;
23280 if you're getting there, it's best to switch to IPv6 virtual
23284 - The ADDRMAP command can no longer generate an ill-formed error
23285 code on a failed MAPADDRESS. It now says "internal" rather than
23286 an English sentence fragment with spaces in the middle. Bugfix on
23287 Tor 0.2.0.19-alpha.
23288 - Fix log messages and comments to avoid saying "GMT" when we mean
23289 "UTC". Fixes bug 6113.
23290 - Compile on win64 using mingw64. Fixes bug 7260; patches from
23292 - Fix a crash when debugging unit tests on Windows: deallocate a
23293 shared library with FreeLibrary, not CloseHandle. Fixes bug 7306;
23294 bugfix on 0.2.2.17-alpha. Reported by "ultramage".
23297 - The DirServer option is now DirAuthority, for consistency with
23298 current naming patterns. You can still use the old DirServer form.
23300 o Code simplification and refactoring:
23301 - Move the client-side address-map/virtual-address/DNS-cache code
23302 out of connection_edge.c into a new addressmap.c module.
23303 - Remove unused code for parsing v1 directories and "running routers"
23304 documents. Fixes bug 6887.
23307 Changes in version 0.2.3.25 - 2012-11-19
23308 The Tor 0.2.3 release series is dedicated to the memory of Len "rabbi"
23309 Sassaman (1980-2011), a long-time cypherpunk, anonymity researcher,
23310 Mixmaster maintainer, Pynchon Gate co-designer, CodeCon organizer,
23311 programmer, and friend. Unstinting in his dedication to the cause of
23312 freedom, he inspired and helped many of us as we began our work on
23313 anonymity, and inspires us still. Please honor his memory by writing
23314 software to protect people's freedoms, and by helping others to do so.
23316 Tor 0.2.3.25, the first stable release in the 0.2.3 branch, features
23317 significantly reduced directory overhead (via microdescriptors),
23318 enormous crypto performance improvements for fast relays on new
23319 enough hardware, a new v3 TLS handshake protocol that can better
23320 resist fingerprinting, support for protocol obfuscation plugins (aka
23321 pluggable transports), better scalability for hidden services, IPv6
23322 support for bridges, performance improvements like allowing clients
23323 to skip the first round-trip on the circuit ("optimistic data") and
23324 refilling token buckets more often, a new "stream isolation" design
23325 to isolate different applications on different circuits, and many
23326 stability, security, and privacy fixes.
23329 - Tor tries to wipe potentially sensitive data after using it, so
23330 that if some subsequent security failure exposes Tor's memory,
23331 the damage will be limited. But we had a bug where the compiler
23332 was eliminating these wipe operations when it decided that the
23333 memory was no longer visible to a (correctly running) program,
23334 hence defeating our attempt at defense in depth. We fix that
23335 by using OpenSSL's OPENSSL_cleanse() operation, which a compiler
23336 is unlikely to optimize away. Future versions of Tor may use
23337 a less ridiculously heavy approach for this. Fixes bug 7352.
23338 Reported in an article by Andrey Karpov.
23341 - Fix a harmless bug when opting against publishing a relay descriptor
23342 because DisableNetwork is set. Fixes bug 7464; bugfix on
23346 Changes in version 0.2.4.6-alpha - 2012-11-13
23347 Tor 0.2.4.6-alpha fixes an assert bug that has been plaguing relays,
23348 makes our defense-in-depth memory wiping more reliable, and begins to
23349 count IPv6 addresses in bridge statistics,
23352 - Fix an assertion failure that could occur when closing a connection
23353 with a spliced rendezvous circuit. Fix for bug 7212; bugfix on
23355 - Tor tries to wipe potentially sensitive data after using it, so
23356 that if some subsequent security failure exposes Tor's memory,
23357 the damage will be limited. But we had a bug where the compiler
23358 was eliminating these wipe operations when it decided that the
23359 memory was no longer visible to a (correctly running) program,
23360 hence defeating our attempt at defense in depth. We fix that
23361 by using OpenSSL's OPENSSL_cleanse() operation, which a compiler
23362 is unlikely to optimize away. Future versions of Tor may use
23363 a less ridiculously heavy approach for this. Fixes bug 7352.
23364 Reported in an article by Andrey Karpov.
23367 - Add GeoIP database for IPv6 addresses. The new config option
23369 - Bridge statistics now count bridge clients connecting over IPv6:
23370 bridge statistics files now list "bridge-ip-versions" and
23371 extra-info documents list "geoip6-db-digest". The control protocol
23372 "CLIENTS_SEEN" and "ip-to-country" queries now support IPv6. Initial
23373 implementation by "shkoo", addressing ticket 5055.
23376 - Warn when we are binding low ports when hibernation is enabled;
23377 previously we had warned when we were _advertising_ low ports with
23378 hibernation enabled. Fixes bug 7285; bugfix on 0.2.3.9-alpha.
23379 - Fix a harmless bug when opting against publishing a relay descriptor
23380 because DisableNetwork is set. Fixes bug 7464; bugfix on
23382 - Add warning message when a managed proxy dies during configuration.
23383 Fixes bug 7195; bugfix on 0.2.4.2-alpha.
23384 - Fix a linking error when building tor-fw-helper without miniupnp.
23385 Fixes bug 7235; bugfix on 0.2.4.2-alpha. Fix by Anthony G. Basile.
23386 - Check for closing an or_connection_t without going through correct
23387 channel functions; emit a warning and then call
23388 connection_or_close_for_error() so we don't assert as in bugs 7212
23390 - Compile correctly on compilers without C99 designated initializer
23391 support. Fixes bug 7286; bugfix on 0.2.4.4-alpha.
23392 - Avoid a possible assert that can occur when channel_send_destroy() is
23393 called on a channel in CHANNEL_STATE_CLOSING, CHANNEL_STATE_CLOSED,
23394 or CHANNEL_STATE_ERROR when the Tor process is resumed after being
23395 blocked for a long interval. Fixes bug 7350; bugfix on 0.2.4.4-alpha.
23396 - Fix a memory leak on failing cases of channel_tls_process_certs_cell.
23397 Fixes bug 7422; bugfix on 0.2.4.4-alpha.
23399 o Code simplification and refactoring:
23400 - Start using OpenBSD's implementation of queue.h, so that we don't
23401 need to hand-roll our own pointer and list structures whenever we
23402 need them. (We can't rely on a sys/queue.h, since some operating
23403 systems don't have them, and the ones that do have them don't all
23404 present the same extensions.)
23407 Changes in version 0.2.4.5-alpha - 2012-10-25
23408 Tor 0.2.4.5-alpha comes hard at the heels of 0.2.4.4-alpha, to fix
23409 two important security vulnerabilities that could lead to remotely
23410 triggerable relay crashes, fix a major bug that was preventing clients
23411 from choosing suitable exit nodes, and refactor some of our code.
23413 o Major bugfixes (security, also in 0.2.3.24-rc):
23414 - Fix a group of remotely triggerable assertion failures related to
23415 incorrect link protocol negotiation. Found, diagnosed, and fixed
23416 by "some guy from France". Fix for CVE-2012-2250; bugfix on
23418 - Fix a denial of service attack by which any directory authority
23419 could crash all the others, or by which a single v2 directory
23420 authority could crash everybody downloading v2 directory
23421 information. Fixes bug 7191; bugfix on 0.2.0.10-alpha.
23423 o Major bugfixes (also in 0.2.3.24-rc):
23424 - When parsing exit policy summaries from microdescriptors, we had
23425 previously been ignoring the last character in each one, so that
23426 "accept 80,443,8080" would be treated by clients as indicating
23427 a node that allows access to ports 80, 443, and 808. That would
23428 lead to clients attempting connections that could never work,
23429 and ignoring exit nodes that would support their connections. Now
23430 clients parse these exit policy summaries correctly. Fixes bug 7192;
23431 bugfix on 0.2.3.1-alpha.
23433 o Minor bugfixes (also in 0.2.3.24-rc):
23434 - Clients now consider the ClientRejectInternalAddresses config option
23435 when using a microdescriptor consensus stanza to decide whether
23436 an exit relay would allow exiting to an internal address. Fixes
23437 bug 7190; bugfix on 0.2.3.1-alpha.
23440 - Only disable TLS session ticket support when running as a TLS
23441 server. Now clients will blend better with regular Firefox
23442 connections. Fixes bug 7189; bugfix on Tor 0.2.3.23-rc.
23444 o Code simplification and refactoring:
23445 - Start using OpenBSD's implementation of queue.h (originally by
23447 - Move the entry node code from circuitbuild.c to its own file.
23448 - Move the circuit build timeout tracking code from circuitbuild.c
23452 Changes in version 0.2.3.24-rc - 2012-10-25
23453 Tor 0.2.3.24-rc fixes two important security vulnerabilities that
23454 could lead to remotely triggerable relay crashes, and fixes
23455 a major bug that was preventing clients from choosing suitable exit
23458 o Major bugfixes (security):
23459 - Fix a group of remotely triggerable assertion failures related to
23460 incorrect link protocol negotiation. Found, diagnosed, and fixed
23461 by "some guy from France". Fix for CVE-2012-2250; bugfix on
23463 - Fix a denial of service attack by which any directory authority
23464 could crash all the others, or by which a single v2 directory
23465 authority could crash everybody downloading v2 directory
23466 information. Fixes bug 7191; bugfix on 0.2.0.10-alpha.
23469 - When parsing exit policy summaries from microdescriptors, we had
23470 previously been ignoring the last character in each one, so that
23471 "accept 80,443,8080" would be treated by clients as indicating
23472 a node that allows access to ports 80, 443, and 808. That would
23473 lead to clients attempting connections that could never work,
23474 and ignoring exit nodes that would support their connections. Now
23475 clients parse these exit policy summaries correctly. Fixes bug 7192;
23476 bugfix on 0.2.3.1-alpha.
23479 - Clients now consider the ClientRejectInternalAddresses config option
23480 when using a microdescriptor consensus stanza to decide whether
23481 an exit relay would allow exiting to an internal address. Fixes
23482 bug 7190; bugfix on 0.2.3.1-alpha.
23485 Changes in version 0.2.4.4-alpha - 2012-10-20
23486 Tor 0.2.4.4-alpha adds a new v3 directory authority, fixes a privacy
23487 vulnerability introduced by a change in OpenSSL, fixes a remotely
23488 triggerable assert, and adds new channel_t and circuitmux_t abstractions
23489 that will make it easier to test new connection transport and cell
23490 scheduling algorithms.
23492 o New directory authorities (also in 0.2.3.23-rc):
23493 - Add Faravahar (run by Sina Rabbani) as the ninth v3 directory
23494 authority. Closes ticket 5749.
23496 o Major bugfixes (security/privacy, also in 0.2.3.23-rc):
23497 - Disable TLS session tickets. OpenSSL's implementation was giving
23498 our TLS session keys the lifetime of our TLS context objects, when
23499 perfect forward secrecy would want us to discard anything that
23500 could decrypt a link connection as soon as the link connection
23501 was closed. Fixes bug 7139; bugfix on all versions of Tor linked
23502 against OpenSSL 1.0.0 or later. Found by Florent Daignière.
23503 - Discard extraneous renegotiation attempts once the V3 link
23504 protocol has been initiated. Failure to do so left us open to
23505 a remotely triggerable assertion failure. Fixes CVE-2012-2249;
23506 bugfix on 0.2.3.6-alpha. Reported by "some guy from France".
23508 o Internal abstraction features:
23509 - Introduce new channel_t abstraction between circuits and
23510 or_connection_t to allow for implementing alternate OR-to-OR
23511 transports. A channel_t is an abstract object which can either be a
23512 cell-bearing channel, which is responsible for authenticating and
23513 handshaking with the remote OR and transmitting cells to and from
23514 it, or a listening channel, which spawns new cell-bearing channels
23515 at the request of remote ORs. Implements part of ticket 6465.
23516 - Also new is the channel_tls_t subclass of channel_t, adapting it
23517 to the existing or_connection_t code. The V2/V3 protocol handshaking
23518 code which formerly resided in command.c has been moved below the
23519 channel_t abstraction layer and may be found in channeltls.c now.
23520 Implements the rest of ticket 6465.
23521 - Introduce new circuitmux_t storing the queue of circuits for
23522 a channel; this encapsulates and abstracts the queue logic and
23523 circuit selection policy, and allows the latter to be overridden
23524 easily by switching out a policy object. The existing EWMA behavior
23525 is now implemented as a circuitmux_policy_t. Resolves ticket 6816.
23527 o Required libraries:
23528 - Tor now requires OpenSSL 0.9.8 or later. OpenSSL 1.0.0 or later is
23529 strongly recommended.
23532 - Warn users who run hidden services on a Tor client with
23533 UseEntryGuards disabled that their hidden services will be
23534 vulnerable to http://freehaven.net/anonbib/#hs-attack06 (the
23535 attack which motivated Tor to support entry guards in the first
23536 place). Resolves ticket 6889.
23537 - Tor now builds correctly on Bitrig, an OpenBSD fork. Patch from
23538 dhill. Resolves ticket 6982.
23539 - Option OutboundBindAddress can be specified multiple times and
23540 accepts IPv6 addresses. Resolves ticket 6876.
23542 o Minor bugfixes (also in 0.2.3.23-rc):
23543 - Don't serve or accept v2 hidden service descriptors over a
23544 relay's DirPort. It's never correct to do so, and disabling it
23545 might make it more annoying to exploit any bugs that turn up in the
23546 descriptor-parsing code. Fixes bug 7149.
23547 - Fix two cases in src/or/transports.c where we were calling
23548 fmt_addr() twice in a parameter list. Bug found by David
23549 Fifield. Fixes bug 7014; bugfix on 0.2.3.9-alpha.
23550 - Fix memory leaks whenever we logged any message about the "path
23551 bias" detection. Fixes bug 7022; bugfix on 0.2.3.21-rc.
23552 - When relays refuse a "create" cell because their queue of pending
23553 create cells is too big (typically because their cpu can't keep up
23554 with the arrival rate), send back reason "resource limit" rather
23555 than reason "internal", so network measurement scripts can get a
23556 more accurate picture. Fixes bug 7037; bugfix on 0.1.1.11-alpha.
23559 - Command-line option "--version" implies "--quiet". Fixes bug 6997.
23560 - Free some more still-in-use memory at exit, to make hunting for
23561 memory leaks easier. Resolves bug 7029.
23562 - When a Tor client gets a "truncated" relay cell, the first byte of
23563 its payload specifies why the circuit was truncated. We were
23564 ignoring this 'reason' byte when tearing down the circuit, resulting
23565 in the controller not being told why the circuit closed. Now we
23566 pass the reason from the truncated cell to the controller. Bugfix
23567 on 0.1.2.3-alpha; fixes bug 7039.
23568 - Downgrade "Failed to hand off onionskin" messages to "debug"
23569 severity, since they're typically redundant with the "Your computer
23570 is too slow" messages. Fixes bug 7038; bugfix on 0.2.2.16-alpha.
23571 - Make clients running with IPv6 bridges connect over IPv6 again,
23572 even without setting new config options ClientUseIPv6 and
23573 ClientPreferIPv6ORPort. Fixes bug 6757; bugfix on 0.2.4.1-alpha.
23574 - Use square brackets around IPv6 addresses in numerous places
23575 that needed them, including log messages, HTTPS CONNECT proxy
23576 requests, TransportProxy statefile entries, and pluggable transport
23577 extra-info lines. Fixes bug 7011; patch by David Fifield.
23579 o Code refactoring and cleanup:
23580 - Source files taken from other packages now reside in src/ext;
23581 previously they were scattered around the rest of Tor.
23582 - Avoid use of reserved identifiers in our C code. The C standard
23583 doesn't like us declaring anything that starts with an
23584 underscore, so let's knock it off before we get in trouble. Fix
23585 for bug 1031; bugfix on the first Tor commit.
23588 Changes in version 0.2.3.23-rc - 2012-10-20
23589 Tor 0.2.3.23-rc adds a new v3 directory authority, fixes a privacy
23590 vulnerability introduced by a change in OpenSSL, and fixes a variety
23591 of smaller bugs in preparation for the release.
23593 o New directory authorities:
23594 - Add Faravahar (run by Sina Rabbani) as the ninth v3 directory
23595 authority. Closes ticket 5749.
23597 o Major bugfixes (security/privacy):
23598 - Disable TLS session tickets. OpenSSL's implementation was giving
23599 our TLS session keys the lifetime of our TLS context objects, when
23600 perfect forward secrecy would want us to discard anything that
23601 could decrypt a link connection as soon as the link connection
23602 was closed. Fixes bug 7139; bugfix on all versions of Tor linked
23603 against OpenSSL 1.0.0 or later. Found by Florent Daignière.
23604 - Discard extraneous renegotiation attempts once the V3 link
23605 protocol has been initiated. Failure to do so left us open to
23606 a remotely triggerable assertion failure. Fixes CVE-2012-2249;
23607 bugfix on 0.2.3.6-alpha. Reported by "some guy from France".
23610 - Fix a possible crash bug when checking for deactivated circuits
23611 in connection_or_flush_from_first_active_circuit(). Fixes bug 6341;
23612 bugfix on 0.2.2.7-alpha. Bug report and fix received pseudonymously.
23614 o Minor bugfixes (on 0.2.3.x):
23615 - Fix two cases in src/or/transports.c where we were calling
23616 fmt_addr() twice in a parameter list. Bug found by David
23617 Fifield. Fixes bug 7014; bugfix on 0.2.3.9-alpha.
23618 - Convert an assert in the pathbias code to a log message. The assert
23619 appears to only be triggerable by Tor2Web mode. Fixes bug 6866;
23620 bugfix on 0.2.3.17-beta.
23621 - Fix memory leaks whenever we logged any message about the "path
23622 bias" detection. Fixes bug 7022; bugfix on 0.2.3.21-rc.
23624 o Minor bugfixes (on 0.2.2.x and earlier):
23625 - Don't serve or accept v2 hidden service descriptors over a relay's
23626 DirPort. It's never correct to do so, and disabling it might
23627 make it more annoying to exploit any bugs that turn up in the
23628 descriptor-parsing code. Fixes bug 7149.
23629 - When relays refuse a "create" cell because their queue of pending
23630 create cells is too big (typically because their cpu can't keep up
23631 with the arrival rate), send back reason "resource limit" rather
23632 than reason "internal", so network measurement scripts can get a
23633 more accurate picture. Bugfix on 0.1.1.11-alpha; fixes bug 7037.
23634 - Correct file sizes when reading binary files on Cygwin, to avoid
23635 a bug where Tor would fail to read its state file. Fixes bug 6844;
23636 bugfix on 0.1.2.7-alpha.
23637 - Avoid undefined behavior when parsing the list of supported
23638 rendezvous/introduction protocols in a hidden service descriptor.
23639 Previously, Tor would have confused (as-yet-unused) protocol version
23640 numbers greater than 32 with lower ones on many platforms. Fixes
23641 bug 6827; bugfix on 0.2.0.10-alpha. Found by George Kadianakis.
23643 o Documentation fixes:
23644 - Clarify that hidden services are TCP only. Fixes bug 6024.
23647 Changes in version 0.2.4.3-alpha - 2012-09-22
23648 Tor 0.2.4.3-alpha fixes another opportunity for a remotely triggerable
23649 assertion, resumes letting relays test reachability of their DirPort,
23650 and cleans up a bunch of smaller bugs.
23653 - Fix an assertion failure in tor_timegm() that could be triggered
23654 by a badly formatted directory object. Bug found by fuzzing with
23655 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
23658 - Fix a possible crash bug when checking for deactivated circuits
23659 in connection_or_flush_from_first_active_circuit(). Fixes bug 6341;
23660 bugfix on 0.2.2.7-alpha. Bug report and fix received pseudonymously.
23661 - Allow routers to detect that their own DirPorts are running. When
23662 we removed support for versions_supports_begindir, we also
23663 accidentally removed the mechanism we used to self-test our
23664 DirPort. Diagnosed with help from kargig. Fixes bugs 6814 and 6815;
23665 bugfix on 0.2.4.2-alpha.
23667 o Security features:
23668 - Switch to a completely time-invariant approach for picking nodes
23669 weighted by bandwidth. Our old approach would run through the
23670 part of the loop after it had made its choice slightly slower
23671 than it ran through the part of the loop before it had made its
23672 choice. Addresses ticket 6538.
23673 - Disable the use of Guard nodes when in Tor2WebMode. Guard usage
23674 by tor2web clients allows hidden services to identify tor2web
23675 clients through their repeated selection of the same rendezvous
23676 and introduction point circuit endpoints (their guards). Resolves
23680 - Enable Tor to read configuration, state, and key information from
23681 a FIFO. Previously Tor would only read from files with a positive
23682 stat.st_size. Code from meejah; fixes bug 6044.
23685 - Correct file sizes when reading binary files on Cygwin, to avoid
23686 a bug where Tor would fail to read its state file. Fixes bug 6844;
23687 bugfix on 0.1.2.7-alpha.
23688 - Correctly handle votes with more than 31 flags. Fixes bug 6853;
23689 bugfix on 0.2.0.3-alpha.
23690 - When complaining about a client port on a public address, log
23691 which address we're complaining about. Fixes bug 4020; bugfix on
23692 0.2.3.3-alpha. Patch by Tom Fitzhenry.
23693 - Convert an assert in the pathbias code to a log message. The assert
23694 appears to only be triggerable by Tor2Web mode. Fixes bug 6866;
23695 bugfix on 0.2.3.17-beta.
23696 - Our new buildsystem was overzealous about rebuilding manpages: it
23697 would rebuild them all whenever any one of them changed. Now our
23698 dependency checking should be correct. Fixes bug 6843; bugfix on
23700 - Don't do reachability testing over IPv6 unless AuthDirPublishIPv6
23701 is set. Fixes bug 6880. Bugfix on 0.2.4.1-alpha.
23702 - Correct log printout about which address family is preferred
23703 when connecting to a bridge with both an IPv4 and IPv6 OR port.
23704 Fixes bug 6884; bugfix on 0.2.4.1-alpha.
23706 o Minor bugfixes (code cleanliness):
23707 - Fix round_to_power_of_2() so it doesn't invoke undefined behavior
23708 with large values. This situation was untriggered, but nevertheless
23709 incorrect. Fixes bug 6831; bugfix on 0.2.0.1-alpha.
23710 - Reject consensus votes with more than 64 known-flags. We aren't even
23711 close to that limit yet, and our code doesn't handle it correctly.
23712 Fixes bug 6833; bugfix on 0.2.0.1-alpha.
23713 - Avoid undefined behavior when parsing the list of supported
23714 rendezvous/introduction protocols in a hidden service descriptor.
23715 Previously, Tor would have confused (as-yet-unused) protocol version
23716 numbers greater than 32 with lower ones on many platforms. Fixes
23717 bug 6827; bugfix on 0.2.0.10-alpha. Found by George Kadianakis.
23718 - Fix handling of rendezvous client authorization types over 8.
23719 Fixes bug 6861; bugfix on 0.2.1.5-alpha.
23720 - Fix building with older versions of GCC (2.95, for one) that don't
23721 like preprocessor directives inside macro arguments. Found by
23722 grarpamp. Fixes bug 6842; bugfix on 0.2.4.2-alpha.
23723 - Switch weighted node selection rule from using a list of doubles
23724 to using a list of int64_t. This change should make the process
23725 slightly easier to debug and maintain. Needed to finish ticket 6538.
23727 o Code simplification and refactoring:
23728 - Move the generic "config" code into a new file, and have "config.c"
23729 hold only torrc- and state-related code. Resolves ticket 6823.
23730 - Move the core of our "choose a weighted element at random" logic
23731 into its own function, and give it unit tests. Now the logic is
23732 testable, and a little less fragile too.
23733 - Removed the testing_since field of node_t, which hasn't been used
23734 for anything since 0.2.0.9-alpha.
23736 o Documentation fixes:
23737 - Clarify that hidden services are TCP only. Fixes bug 6024.
23738 - Resolve a typo in torrc.sample.in. Fixes bug 6819; bugfix on
23742 Changes in version 0.2.3.22-rc - 2012-09-11
23743 Tor 0.2.3.22-rc fixes another opportunity for a remotely triggerable
23747 - Fix an assertion failure in tor_timegm() that could be triggered
23748 by a badly formatted directory object. Bug found by fuzzing with
23749 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
23752 - Avoid segfault when starting up having run with an extremely old
23753 version of Tor and parsing its state file. Fixes bug 6801; bugfix
23757 Changes in version 0.2.2.39 - 2012-09-11
23758 Tor 0.2.2.39 fixes two more opportunities for remotely triggerable
23762 - Fix an assertion failure in tor_timegm() that could be triggered
23763 by a badly formatted directory object. Bug found by fuzzing with
23764 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
23765 - Do not crash when comparing an address with port value 0 to an
23766 address policy. This bug could have been used to cause a remote
23767 assertion failure by or against directory authorities, or to
23768 allow some applications to crash clients. Fixes bug 6690; bugfix
23772 Changes in version 0.2.4.2-alpha - 2012-09-10
23773 Tor 0.2.4.2-alpha enables port forwarding for pluggable transports,
23774 raises the default rate limiting even more, and makes the bootstrapping
23775 log messages less noisy.
23778 - Automatically forward the TCP ports of pluggable transport
23779 proxies using tor-fw-helper if PortForwarding is enabled. Implements
23783 - Raise the default BandwidthRate/BandwidthBurst values from 5MB/10MB
23784 to 1GB/1GB. The previous defaults were intended to be "basically
23785 infinite", but it turns out they're now limiting our 100mbit+
23786 relays and bridges. Fixes bug 6605; bugfix on 0.2.0.10-alpha (the
23787 last time we raised it).
23790 - Detect when we're running with a version of OpenSSL other than the
23791 one we compiled with. This has occasionally given people hard-to-
23793 - Log fewer lines at level "notice" about our OpenSSL and Libevent
23794 versions and capabilities when everything is going right. Resolves
23795 part of ticket 6736.
23796 - Directory authorities no long accept descriptors for any version of
23797 Tor before 0.2.2.35, or for any 0.2.3 release before 0.2.3.10-alpha.
23798 These versions are insecure, unsupported, or both. Implements
23802 - Rename the (internal-use-only) UsingTestingNetworkDefaults option
23803 to start with a triple-underscore so the controller won't touch it.
23804 Patch by Meejah. Fixes bug 3155. Bugfix on 0.2.2.23-alpha.
23805 - Avoid segfault when starting up having run with an extremely old
23806 version of Tor and parsing its state file. Fixes bug 6801; bugfix
23808 - Rename the (testing-use-only) _UseFilteringSSLBufferevents option
23809 so it doesn't start with _. Fixes bug 3155. Bugfix on 0.2.3.1-alpha.
23810 - Don't follow the NULL pointer if microdescriptor generation fails.
23811 (This does not appear to be triggerable, but it's best to be safe.)
23812 Found by "f. tp.". Fixes bug 6797; bugfix on 0.2.4.1-alpha.
23813 - Fix mis-declared dependencies on src/common/crypto.c and
23814 src/or/tor_main.c that could break out-of-tree builds under some
23815 circumstances. Fixes bug 6778; bugfix on 0.2.4.1-alpha.
23816 - Avoid a warning when building common_sha1.i out of tree. Fixes bug
23817 6778; bugfix on 0.2.4.1-alpha.
23818 - Fix a harmless (in this case) build warning for implicitly
23819 converting a strlen() to an int. Bugfix on 0.2.4.1-alpha.
23821 o Removed features:
23822 - Now that all versions before 0.2.2.x are disallowed, we no longer
23823 need to work around their missing features. Thus we can remove a
23824 bunch of compatibility code.
23826 o Code refactoring:
23827 - Tweak tor-fw-helper to accept an arbitrary amount of arbitrary
23828 TCP ports to forward. In the past it only accepted two ports:
23829 the ORPort and the DirPort.
23832 Changes in version 0.2.4.1-alpha - 2012-09-05
23833 Tor 0.2.4.1-alpha lets bridges publish their pluggable transports to
23834 bridgedb; lets relays use IPv6 addresses and directory authorities
23835 advertise them; and switches to a cleaner build interface.
23837 This is the first alpha release in a new series, so expect there to
23838 be bugs. Users who would rather test out a more stable branch should
23839 stay with 0.2.3.x for now.
23841 o Major features (bridges):
23842 - Bridges now report the pluggable transports they support to the
23843 bridge authority, so it can pass the supported transports on to
23844 bridgedb and/or eventually do reachability testing. Implements
23847 o Major features (IPv6):
23848 - Bridge authorities now accept IPv6 bridge addresses and include
23849 them in network status documents. Implements ticket 5534.
23850 - Clients who set "ClientUseIPv6 1" may connect to entry nodes over
23851 IPv6. Set "ClientPreferIPv6ORPort 1" to make this even more likely
23852 to happen. Implements ticket 5535.
23853 - All kind of relays, not just bridges, can now advertise an IPv6
23854 OR port. Implements ticket 6362.
23855 - Directory authorities vote on IPv6 OR ports using the new consensus
23856 method 14. Implements ticket 6363.
23858 o Major features (build):
23859 - Switch to a nonrecursive Makefile structure. Now instead of each
23860 Makefile.am invoking other Makefile.am's, there is a master
23861 Makefile.am that includes the others. This change makes our build
23862 process slightly more maintainable, and improves parallelism for
23863 building with make -j. Original patch by Stewart Smith; various
23864 fixes by Jim Meyering.
23865 - Where available, we now use automake's "silent" make rules by
23866 default, so that warnings are easier to spot. You can get the old
23867 behavior with "make V=1". Patch by Stewart Smith for ticket 6522.
23869 o Minor features (code security and spec conformance):
23870 - Clear keys and key-derived material left on the stack in
23871 rendservice.c and rendclient.c. Check return value of
23872 crypto_pk_write_private_key_to_string() in rend_service_load_keys().
23873 These fixes should make us more forward-secure against cold-boot
23874 attacks and the like. Fixes bug 2385.
23875 - Reject EXTEND cells sent to nonexistent streams. According to the
23876 spec, an EXTEND cell sent to _any_ nonzero stream ID is invalid, but
23877 we were only checking for stream IDs that were currently in use.
23878 Found while hunting for more instances of bug 6271. Bugfix on
23879 0.0.2pre8, which introduced incremental circuit construction.
23881 o Minor features (streamlining);
23882 - No longer include the "opt" prefix when generating routerinfos
23883 or v2 directories: it has been needless since Tor 0.1.2. Closes
23885 - Remove some now-needless code that tried to aggressively flush
23886 OR connections as data was added to them. Since 0.2.0.1-alpha, our
23887 cell queue logic has saved us from the failure mode that this code
23888 was supposed to prevent. Removing this code will limit the number
23889 of baroque control flow paths through Tor's network logic. Reported
23890 pseudonymously on IRC. Fixes bug 6468; bugfix on 0.2.0.1-alpha.
23892 o Minor features (controller):
23893 - Add a "GETINFO signal/names" control port command. Implements
23895 - Provide default values for all options via "GETINFO config/defaults".
23896 Implements ticket 4971.
23898 o Minor features (IPv6):
23899 - New config option "AuthDirHasIPv6Connectivity 1" that directory
23900 authorities should set if they have IPv6 connectivity and want to
23901 do reachability tests for IPv6 relays. Implements feature 5974.
23902 - A relay with an IPv6 OR port now sends that address in NETINFO
23903 cells (in addition to its other address). Implements ticket 6364.
23905 o Minor features (log messages):
23906 - Omit the first heartbeat log message, because it never has anything
23907 useful to say, and it clutters up the bootstrapping messages.
23908 Resolves ticket 6758.
23909 - Don't log about reloading the microdescriptor cache at startup. Our
23910 bootstrap warnings are supposed to tell the user when there's a
23911 problem, and our bootstrap notices say when there isn't. Resolves
23912 ticket 6759; bugfix on 0.2.2.6-alpha.
23913 - Don't log "I learned some more directory information" when we're
23914 reading cached directory information. Reserve it for when new
23915 directory information arrives in response to a fetch. Resolves
23917 - Prevent rounding error in path bias counts when scaling
23918 them down, and use the correct scale factor default. Also demote
23919 some path bias related log messages down a level and make others
23920 less scary sounding. Fixes bug 6647. Bugfix against 0.2.3.17-beta.
23921 - We no longer warn so much when generating manpages from their
23924 o Code simplifications and refactoring:
23925 - Enhance our internal sscanf replacement so that we can eliminate
23926 the last remaining uses of the system sscanf. (Though those uses
23927 of sscanf were safe, sscanf itself is generally error prone, so
23928 we want to eliminate when we can.) Fixes ticket 4195 and Coverity
23930 - Move ipv6_preferred from routerinfo_t to node_t. Addresses bug 4620.
23931 - Move last_reachable and testing_since from routerinfo_t to node_t.
23932 Implements ticket 5529.
23933 - Add replaycache_t structure, functions and unit tests, then refactor
23934 rend_service_introduce() to be more clear to read, improve, debug,
23935 and test. Resolves bug 6177.
23936 - Finally remove support for malloc_good_size and malloc_usable_size.
23937 We had hoped that these functions would let us eke a little more
23938 memory out of our malloc implementation. Unfortunately, the only
23939 implementations that provided these functions are also ones that
23940 are already efficient about not overallocation: they never got us
23941 more than 7 or so bytes per allocation. Removing them saves us a
23942 little code complexity and a nontrivial amount of build complexity.
23944 o New requirements:
23945 - Tor maintainers now require Automake version 1.9 or later to build
23946 Tor from the Git repository. (Automake is not required when building
23947 from a source distribution.)
23950 Changes in version 0.2.3.21-rc - 2012-09-05
23951 Tor 0.2.3.21-rc is the fourth release candidate for the Tor 0.2.3.x
23952 series. It fixes a trio of potential security bugs, fixes a bug where
23953 we were leaving some of the fast relays out of the microdescriptor
23954 consensus, resumes interpreting "ORPort 0" and "DirPort 0" correctly,
23955 and cleans up other smaller issues.
23957 o Major bugfixes (security):
23958 - Tear down the circuit if we get an unexpected SENDME cell. Clients
23959 could use this trick to make their circuits receive cells faster
23960 than our flow control would have allowed, or to gum up the network,
23961 or possibly to do targeted memory denial-of-service attacks on
23962 entry nodes. Fixes bug 6252. Bugfix on the 54th commit on Tor --
23963 from July 2002, before the release of Tor 0.0.0. We had committed
23964 this patch previously, but we had to revert it because of bug 6271.
23965 Now that 6271 is fixed, this patch appears to work.
23966 - Reject any attempt to extend to an internal address. Without
23967 this fix, a router could be used to probe addresses on an internal
23968 network to see whether they were accepting connections. Fixes bug
23969 6710; bugfix on 0.0.8pre1.
23970 - Do not crash when comparing an address with port value 0 to an
23971 address policy. This bug could have been used to cause a remote
23972 assertion failure by or against directory authorities, or to
23973 allow some applications to crash clients. Fixes bug 6690; bugfix
23977 - Remove the upper bound on microdescriptor length. We were hitting
23978 the limit for routers with complex exit policies or family
23979 declarations, causing clients to not use them. Fixes the first
23980 piece of bug 6404; fix on 0.2.2.6-alpha.
23981 - Detect "ORPort 0" as meaning, uniformly, that we're not running
23982 as a relay. Previously, some of our code would treat the presence
23983 of any ORPort line as meaning that we should act like a relay,
23984 even though our new listener code would correctly not open any
23985 ORPorts for ORPort 0. Similar bugs in other Port options are also
23986 fixed. Fixes the first half of bug 6507; bugfix on 0.2.3.3-alpha.
23989 - Avoid a pair of double-free and use-after-mark bugs that can
23990 occur with certain timings in canceled and re-received DNS
23991 requests. Fixes bug 6472; bugfix on 0.0.7rc1.
23992 - Fix build and 64-bit compile warnings from --enable-openbsd-malloc.
23993 Fixes bug 6379. Bugfix on 0.2.0.20-rc.
23994 - Allow one-hop directory fetching circuits the full "circuit build
23995 timeout" period, rather than just half of it, before failing them
23996 and marking the relay down. This fix should help reduce cases where
23997 clients declare relays (or worse, bridges) unreachable because
23998 the TLS handshake takes a few seconds to complete. Fixes bug 6743;
23999 bugfix on 0.2.2.2-alpha, where we changed the timeout from a static
24001 - Authorities no longer include any router in their microdescriptor
24002 consensuses for which they couldn't generate or agree on a
24003 microdescriptor. Fixes the second piece of bug 6404; fix on
24005 - Detect and reject attempts to specify both "FooPort" and
24006 "FooPort 0" in the same configuration domain. (It's still okay
24007 to have a FooPort in your configuration file, and use "FooPort 0"
24008 on the command line to disable it.) Fixes the second half of bug
24009 6507; bugfix on 0.2.3.3-alpha.
24010 - Make wildcarded addresses (that is, ones beginning with "*.") work
24011 when provided via the controller's MapAddress command. Previously,
24012 they were accepted, but we never actually noticed that they were
24013 wildcards. Fixes bug 6244; bugfix on 0.2.3.9-alpha.
24014 - Avoid crashing on a malformed state file where EntryGuardPathBias
24015 precedes EntryGuard. Fix for bug 6774; bugfix on 0.2.3.17-beta.
24016 - Add a (probably redundant) memory clear between iterations of
24017 the router status voting loop, to prevent future coding errors
24018 where data might leak between iterations of the loop. Resolves
24021 o Minor bugfixes (log messages):
24022 - Downgrade "set buildtimeout to low value" messages to "info"
24023 severity; they were never an actual problem, there was never
24024 anything reasonable to do about them, and they tended to spam logs
24025 from time to time. Fixes bug 6251; bugfix on 0.2.2.2-alpha.
24026 - Downgrade path-bias warning messages to "info". We'll try to get
24027 them working better in 0.2.4. Add internal circuit construction
24028 state to protect against the noisy warn message "Unexpectedly high
24029 circuit_successes". Also add some additional rate-limited notice
24030 messages to help determine the root cause of the warn. Fixes bug
24031 6475. Bugfix against 0.2.3.17-beta.
24032 - Move log message when unable to find a microdesc in a routerstatus
24033 entry to parse time. Previously we'd spam this warning every time
24034 we tried to figure out which microdescriptors to download. Fixes
24035 the third piece of bug 6404; fix on 0.2.3.18-rc.
24038 - Consider new, removed or changed IPv6 OR ports a non-cosmetic
24039 change when the authority is deciding whether to accept a newly
24040 uploaded descriptor. Implements ticket 6423.
24041 - Add missing documentation for consensus and microdesc files.
24042 Resolves ticket 6732.
24045 Changes in version 0.2.2.38 - 2012-08-12
24046 Tor 0.2.2.38 fixes a remotely triggerable crash bug, and fixes a timing
24047 attack that could in theory leak path information.
24050 - Avoid an uninitialized memory read when reading a vote or consensus
24051 document that has an unrecognized flavor name. This read could
24052 lead to a remote crash bug. Fixes bug 6530; bugfix on 0.2.2.6-alpha.
24053 - Try to leak less information about what relays a client is
24054 choosing to a side-channel attacker. Previously, a Tor client would
24055 stop iterating through the list of available relays as soon as it
24056 had chosen one, thus finishing a little earlier when it picked
24057 a router earlier in the list. If an attacker can recover this
24058 timing information (nontrivial but not proven to be impossible),
24059 they could learn some coarse-grained information about which relays
24060 a client was picking (middle nodes in particular are likelier to
24061 be affected than exits). The timing attack might be mitigated by
24062 other factors (see bug 6537 for some discussion), but it's best
24063 not to take chances. Fixes bug 6537; bugfix on 0.0.8rc1.
24066 Changes in version 0.2.3.20-rc - 2012-08-05
24067 Tor 0.2.3.20-rc is the third release candidate for the Tor 0.2.3.x
24068 series. It fixes a pair of code security bugs and a potential anonymity
24069 issue, updates our RPM spec files, and cleans up other smaller issues.
24072 - Avoid read-from-freed-memory and double-free bugs that could occur
24073 when a DNS request fails while launching it. Fixes bug 6480;
24074 bugfix on 0.2.0.1-alpha.
24075 - Avoid an uninitialized memory read when reading a vote or consensus
24076 document that has an unrecognized flavor name. This read could
24077 lead to a remote crash bug. Fixes bug 6530; bugfix on 0.2.2.6-alpha.
24078 - Try to leak less information about what relays a client is
24079 choosing to a side-channel attacker. Previously, a Tor client would
24080 stop iterating through the list of available relays as soon as it
24081 had chosen one, thus finishing a little earlier when it picked
24082 a router earlier in the list. If an attacker can recover this
24083 timing information (nontrivial but not proven to be impossible),
24084 they could learn some coarse-grained information about which relays
24085 a client was picking (middle nodes in particular are likelier to
24086 be affected than exits). The timing attack might be mitigated by
24087 other factors (see bug 6537 for some discussion), but it's best
24088 not to take chances. Fixes bug 6537; bugfix on 0.0.8rc1.
24091 - Try to make the warning when giving an obsolete SOCKSListenAddress
24092 a little more useful.
24093 - Terminate active server managed proxies if Tor stops being a
24094 relay. Addresses parts of bug 6274; bugfix on 0.2.3.6-alpha.
24095 - Provide a better error message about possible OSX Asciidoc failure
24096 reasons. Fixes bug 6436.
24097 - Warn when Tor is configured to use accounting in a way that can
24098 link a hidden service to some other hidden service or public
24099 address. Resolves ticket 6490.
24102 - Check return value of fputs() when writing authority certificate
24103 file. Fixes Coverity issue 709056; bugfix on 0.2.0.1-alpha.
24104 - Ignore ServerTransportPlugin lines when Tor is not configured as
24105 a relay. Fixes bug 6274; bugfix on 0.2.3.6-alpha.
24106 - When disabling guards for having too high a proportion of failed
24107 circuits, make sure to look at each guard. Fixes bug 6397; bugfix
24111 - Update our default RPM spec files to work with mock and rpmbuild
24112 on RHEL/Fedora. They have an updated set of dependencies and
24113 conflicts, a fix for an ancient typo when creating the "_tor"
24114 user, and better instructions. Thanks to Ondrej Mikle for the
24115 patch series. Fixes bug 6043.
24118 - Make it possible to set the TestingTorNetwork configuration
24119 option using AlternateDirAuthority and AlternateBridgeAuthority
24120 as an alternative to setting DirServer. Addresses ticket 6377.
24123 - Clarify the documentation for the Alternate*Authority options.
24125 - Fix some typos in the manpages. Patch from A. Costa. Fixes bug 6500.
24127 o Code simplification and refactoring:
24128 - Do not use SMARTLIST_FOREACH for any loop whose body exceeds
24129 10 lines. Also, don't nest them. Doing so in the past has
24130 led to hard-to-debug code. The new style is to use the
24131 SMARTLIST_FOREACH_{BEGIN,END} pair. Addresses issue 6400.
24134 Changes in version 0.2.3.19-rc - 2012-07-06
24135 Tor 0.2.3.19-rc is the second release candidate for the Tor 0.2.3.x
24136 series. It fixes the compile on Windows, reverts to a GeoIP database
24137 that isn't as broken, and fixes a flow control bug that has been around
24138 since the beginning of Tor.
24141 - Fix a bug handling SENDME cells on nonexistent streams that could
24142 result in bizarre window values. Report and patch contributed
24143 pseudonymously. Fixes part of bug 6271. This bug was introduced
24144 before the first Tor release, in svn commit r152.
24145 - Revert to the May 1 2012 Maxmind GeoLite Country database. In the
24146 June 2012 database, Maxmind marked many Tor relays as country "A1",
24147 which will cause risky behavior for clients that set EntryNodes
24148 or ExitNodes. Addresses bug 6334; bugfix on 0.2.3.17-beta.
24149 - Instead of ENOBUFS on Windows, say WSAENOBUFS. Fixes compilation
24150 on Windows. Fixes bug 6296; bugfix on 0.2.3.18-rc.
24153 - Fix wrong TCP port range in parse_port_range(). Fixes bug 6218;
24154 bugfix on 0.2.1.10-alpha.
24157 Changes in version 0.2.3.18-rc - 2012-06-28
24158 Tor 0.2.3.18-rc is the first release candidate for the Tor 0.2.3.x
24159 series. It fixes a few smaller bugs, but generally appears stable.
24160 Please test it and let us know whether it is!
24163 - Allow wildcarded mapaddress targets to be specified on the
24164 controlport. Partially fixes bug 6244; bugfix on 0.2.3.9-alpha.
24165 - Make our linker option detection code more robust against linkers
24166 such as on FreeBSD 8, where a bad combination of options completes
24167 successfully but makes an unrunnable binary. Fixes bug 6173;
24168 bugfix on 0.2.3.17-beta.
24170 o Minor bugfixes (on 0.2.2.x and earlier):
24171 - Avoid a false positive in the util/threads unit test by increasing
24172 the maximum timeout time. Fixes bug 6227; bugfix on 0.2.0.4-alpha.
24173 - Replace "Sending publish request" log messages with "Launching
24174 upload", so that they no longer confusingly imply that we're
24175 sending something to a directory we might not even be connected
24176 to yet. Fixes bug 3311; bugfix on 0.2.0.10-alpha.
24177 - Make sure to set *socket_error in all error cases in
24178 connection_connect(), so it can't produce a warning about
24179 errno being zero from errno_to_orconn_end_reason(). Bugfix on
24180 0.2.1.1-alpha; resolves ticket 6028.
24181 - Downgrade "Got a certificate, but we already have it" log messages
24182 from warning to info, except when we're a dirauth. Fixes bug 5238;
24183 bugfix on 0.2.1.7-alpha.
24184 - When checking for requested signatures on the latest consensus
24185 before serving it to a client, make sure to check the right
24186 consensus flavor. Bugfix on 0.2.2.6-alpha.
24187 - Downgrade "eventdns rejected address" message to LOG_PROTOCOL_WARN.
24188 Fixes bug 5932; bugfix on 0.2.2.7-alpha.
24190 o Minor bugfixes (on 0.2.3.x):
24191 - Make format_helper_exit_status() avoid unnecessary space padding
24192 and stop confusing log_from_pipe(). Fixes ticket 5557; bugfix
24194 - Downgrade a message about cleaning the microdescriptor cache to
24195 "info" from "notice". Fixes bug 6238; bugfix on 0.2.3.1-alpha.
24196 - Log a BUG message at severity INFO if we have a networkstatus with
24197 a missing entry for some microdescriptor. Continues on a patch
24199 - Improve the log message when a managed proxy fails to launch. Fixes
24200 bug 5099; bugfix on 0.2.3.6-alpha.
24201 - Don't do DNS lookups when parsing corrupted managed proxy protocol
24202 messages. Fixes bug 6226; bugfix on 0.2.3.6-alpha.
24203 - When formatting wildcarded address mappings for the controller,
24204 be sure to include "*." as appropriate. Partially fixes bug 6244;
24205 bugfix on 0.2.3.9-alpha.
24206 - Avoid a warning caused by using strcspn() from glibc with clang 3.0.
24207 Bugfix on 0.2.3.13-alpha.
24208 - Stop logging messages about running with circuit timeout learning
24209 enabled at severity LD_BUG. Fixes bug 6169; bugfix on 0.2.3.17-beta.
24210 - Disable a spurious warning about reading on a marked and flushing
24211 connection. We shouldn't be doing that, but apparently we
24212 sometimes do. Fixes bug 6203; bugfix on 0.2.3.17-beta.
24213 - Fix a bug that stopped AllowDotExit from working on addresses
24214 that had an entry in the DNS cache. Fixes bug 6211; bugfix on
24217 o Code simplification, refactoring, unit tests:
24218 - Move tor_gettimeofday_cached() into compat_libevent.c, and use
24219 Libevent's notion of cached time when possible.
24220 - Remove duplicate code for invoking getrlimit() from control.c.
24221 - Add a unit test for the environment_variable_names_equal function.
24224 - Document the --defaults-torrc option, and the new (in 0.2.3)
24225 semantics for overriding, extending, and clearing lists of
24226 options. Closes bug 4748.
24229 Changes in version 0.2.3.17-beta - 2012-06-15
24230 Tor 0.2.3.17-beta enables compiler and linker hardening by default,
24231 gets our TLS handshake back on track for being able to blend in with
24232 Firefox, fixes a big bug in 0.2.3.16-alpha that broke Tor's interaction
24233 with Vidalia, and otherwise continues to get us closer to a release
24237 - Enable gcc and ld hardening by default. Resolves ticket 5210.
24238 - Update TLS cipher list to match Firefox 8 and later. Resolves
24240 - Implement the client side of proposal 198: remove support for
24241 clients falsely claiming to support standard ciphersuites that
24242 they can actually provide. As of modern OpenSSL versions, it's not
24243 necessary to fake any standard ciphersuite, and doing so prevents
24244 us from using better ciphersuites in the future, since servers
24245 can't know whether an advertised ciphersuite is really supported or
24246 not. Some hosts -- notably, ones with very old versions of OpenSSL
24247 or where OpenSSL has been built with ECC disabled -- will stand
24248 out because of this change; TBB users should not be affected.
24251 - Change the default value for DynamicDHGroups (introduced in
24252 0.2.3.9-alpha) to 0. This feature can make Tor relays less
24253 identifiable by their use of the mod_ssl DH group, but at
24254 the cost of some usability (#4721) and bridge tracing (#6087)
24255 regressions. Resolves ticket 5598.
24256 - Send a CRLF at the end of each STATUS_* control protocol event. This
24257 bug tickled a bug in Vidalia which would make it freeze. Fixes
24258 bug 6094; bugfix on 0.2.3.16-alpha.
24261 - Disable writing on marked-for-close connections when they are
24262 blocked on bandwidth, to prevent busy-looping in Libevent. Fixes
24263 bug 5263; bugfix on 0.0.2pre13, where we first added a special
24264 case for flushing marked connections.
24265 - Detect SSL handshake even when the initial attempt to write the
24266 server hello fails. Fixes bug 4592; bugfix on 0.2.0.13-alpha.
24267 - Change the AllowDotExit rules so they should actually work.
24268 We now enforce AllowDotExit only immediately after receiving an
24269 address via SOCKS or DNSPort: other sources are free to provide
24270 .exit addresses after the resolution occurs. Fixes bug 3940;
24271 bugfix on 0.2.2.1-alpha.
24272 - Fix a (harmless) integer overflow in cell statistics reported by
24273 some fast relays. Fixes bug 5849; bugfix on 0.2.2.1-alpha.
24274 - Make sure circuitbuild.c checks LearnCircuitBuildTimeout in all the
24275 right places and never depends on the consensus parameters or
24276 computes adaptive timeouts when it is disabled. Fixes bug 5049;
24277 bugfix on 0.2.2.14-alpha.
24278 - When building Tor on Windows with -DUNICODE (not default), ensure
24279 that error messages, filenames, and DNS server names are always
24280 NUL-terminated when we convert them to a single-byte encoding.
24281 Fixes bug 5909; bugfix on 0.2.2.16-alpha.
24282 - Make Tor build correctly again with -DUNICODE -D_UNICODE defined.
24283 Fixes bug 6097; bugfix on 0.2.2.16-alpha.
24284 - Fix an edge case where TestingTorNetwork is set but the authorities
24285 and relays all have an uptime of zero, where the private Tor network
24286 could briefly lack support for hidden services. Fixes bug 3886;
24287 bugfix on 0.2.2.18-alpha.
24288 - Correct the manpage's descriptions for the default values of
24289 DirReqStatistics and ExtraInfoStatistics. Fixes bug 2865; bugfix
24291 - Fix the documentation for the --hush and --quiet command line
24292 options, which changed their behavior back in 0.2.3.3-alpha.
24293 - Fix compilation warning with clang 3.1. Fixes bug 6141; bugfix on
24297 - Rate-limit the "Weighted bandwidth is 0.000000" message, and add
24298 more information to it, so that we can track it down in case it
24299 returns again. Mitigates bug 5235.
24300 - Check CircuitBuildTimeout and LearnCircuitBuildTimeout in
24301 options_validate(); warn if LearnCircuitBuildTimeout is disabled and
24302 CircuitBuildTimeout is set unreasonably low. Resolves ticket 5452.
24303 - Warn the user when HTTPProxy, but no other proxy type, is
24304 configured. This can cause surprising behavior: it doesn't send
24305 all of Tor's traffic over the HTTPProxy -- it sends unencrypted
24306 directory traffic only. Resolves ticket 4663.
24307 - Issue a notice if a guard completes less than 40% of your circuits.
24308 Threshold is configurable by torrc option PathBiasNoticeRate and
24309 consensus parameter pb_noticepct. There is additional, off-by-
24310 default code to disable guards which fail too many circuits.
24311 Addresses ticket 5458.
24312 - Update to the June 6 2012 Maxmind GeoLite Country database.
24314 o Code simplifications and refactoring:
24315 - Remove validate_pluggable_transports_config(): its warning
24316 message is now handled by connection_or_connect().
24319 Changes in version 0.2.2.37 - 2012-06-06
24320 Tor 0.2.2.37 introduces a workaround for a critical renegotiation
24321 bug in OpenSSL 1.0.1 (where 20% of the Tor network can't talk to itself
24325 - Work around a bug in OpenSSL that broke renegotiation with TLS
24326 1.1 and TLS 1.2. Without this workaround, all attempts to speak
24327 the v2 Tor connection protocol when both sides were using OpenSSL
24328 1.0.1 would fail. Resolves ticket 6033.
24329 - When waiting for a client to renegotiate, don't allow it to add
24330 any bytes to the input buffer. This fixes a potential DoS issue.
24331 Fixes bugs 5934 and 6007; bugfix on 0.2.0.20-rc.
24332 - Fix an edge case where if we fetch or publish a hidden service
24333 descriptor, we might build a 4-hop circuit and then use that circuit
24334 for exiting afterwards -- even if the new last hop doesn't obey our
24335 ExitNodes config option. Fixes bug 5283; bugfix on 0.2.0.10-alpha.
24338 - Fix a build warning with Clang 3.1 related to our use of vasprintf.
24339 Fixes bug 5969. Bugfix on 0.2.2.11-alpha.
24342 - Tell GCC and Clang to check for any errors in format strings passed
24343 to the tor_v*(print|scan)f functions.
24346 Changes in version 0.2.3.16-alpha - 2012-06-05
24347 Tor 0.2.3.16-alpha introduces a workaround for a critical renegotiation
24348 bug in OpenSSL 1.0.1 (where 20% of the Tor network can't talk to itself
24349 currently). It also fixes a variety of smaller bugs and other cleanups
24350 that get us closer to a release candidate.
24352 o Major bugfixes (general):
24353 - Work around a bug in OpenSSL that broke renegotiation with TLS
24354 1.1 and TLS 1.2. Without this workaround, all attempts to speak
24355 the v2 Tor connection protocol when both sides were using OpenSSL
24356 1.0.1 would fail. Resolves ticket 6033.
24357 - When waiting for a client to renegotiate, don't allow it to add
24358 any bytes to the input buffer. This fixes a potential DoS issue.
24359 Fixes bugs 5934 and 6007; bugfix on 0.2.0.20-rc.
24360 - Pass correct OR address to managed proxies (like obfsproxy),
24361 even when ORListenAddress is used. Fixes bug 4865; bugfix on
24363 - The advertised platform of a router now includes only its operating
24364 system's name (e.g., "Linux", "Darwin", "Windows 7"), and not its
24365 service pack level (for Windows) or its CPU architecture (for Unix).
24366 We also no longer include the "git-XYZ" tag in the version. Resolves
24369 o Major bugfixes (clients):
24370 - If we are unable to find any exit that supports our predicted ports,
24371 stop calling them predicted, so that we don't loop and build
24372 hopeless circuits indefinitely. Fixes bug 3296; bugfix on 0.0.9pre6,
24373 which introduced predicted ports.
24374 - Fix an edge case where if we fetch or publish a hidden service
24375 descriptor, we might build a 4-hop circuit and then use that circuit
24376 for exiting afterwards -- even if the new last hop doesn't obey our
24377 ExitNodes config option. Fixes bug 5283; bugfix on 0.2.0.10-alpha.
24378 - Check at each new consensus whether our entry guards were picked
24379 long enough ago that we should rotate them. Previously, we only
24380 did this check at startup, which could lead to us holding a guard
24381 indefinitely. Fixes bug 5380; bugfix on 0.2.1.14-rc.
24382 - When fetching a bridge descriptor from a bridge authority,
24383 always do so anonymously, whether we have been able to open
24384 circuits or not. Partial fix for bug 1938; bugfix on 0.2.0.7-alpha.
24385 This behavior makes it *safer* to use UpdateBridgesFromAuthority,
24386 but we'll need to wait for bug 6010 before it's actually usable.
24388 o Major bugfixes (directory authorities):
24389 - When computing weight parameters, behave more robustly in the
24390 presence of a bad bwweightscale value. Previously, the authorities
24391 would crash if they agreed on a sufficiently broken weight_scale
24392 value: now, they use a reasonable default and carry on. Partial
24393 fix for 5786; bugfix on 0.2.2.17-alpha.
24394 - Check more thoroughly to prevent a rogue authority from
24395 double-voting on any consensus directory parameter. Previously,
24396 authorities would crash in this case if the total number of
24397 votes for any parameter exceeded the number of active voters,
24398 but would let it pass otherwise. Partial fix for bug 5786; bugfix
24402 - Rate-limit log messages when asked to connect anonymously to
24403 a private address. When these hit, they tended to hit fast and
24404 often. Also, don't bother trying to connect to addresses that we
24405 are sure will resolve to 127.0.0.1: getting 127.0.0.1 in a directory
24406 reply makes us think we have been lied to, even when the address the
24407 client tried to connect to was "localhost." Resolves ticket 2822.
24408 - Allow packagers to insert an extra string in server descriptor
24409 platform lines by setting the preprocessor variable TOR_BUILD_TAG.
24410 Resolves the rest of ticket 2988.
24411 - Raise the threshold of server descriptors needed (75%) and exit
24412 server descriptors needed (50%) before we will declare ourselves
24413 bootstrapped. This will make clients start building circuits a
24414 little later, but makes the initially constructed circuits less
24415 skewed and less in conflict with further directory fetches. Fixes
24417 - Close any connection that sends unrecognized junk before the
24418 handshake. Solves an issue noted in bug 4369.
24419 - Improve log messages about managed transports. Resolves ticket 5070.
24420 - Tag a bridge's descriptor as "never to be sent unencrypted".
24421 This shouldn't matter, since bridges don't open non-anonymous
24422 connections to the bridge authority and don't allow unencrypted
24423 directory connections from clients, but we might as well make
24424 sure. Closes bug 5139.
24425 - Expose our view of whether we have gone dormant to the controller,
24426 via a new "GETINFO dormant" value. Torbutton and other controllers
24427 can use this to avoid doing periodic requests through Tor while
24428 it's dormant (bug 4718). Fixes bug 5954.
24429 - Tell GCC and Clang to check for any errors in format strings passed
24430 to the tor_v*(print|scan)f functions.
24431 - Update to the May 1 2012 Maxmind GeoLite Country database.
24433 o Minor bugfixes (already included in 0.2.2.36):
24434 - Reject out-of-range times like 23:59:61 in parse_rfc1123_time().
24435 Fixes bug 5346; bugfix on 0.0.8pre3.
24436 - Correct parsing of certain date types in parse_http_time().
24437 Without this patch, If-Modified-Since would behave
24438 incorrectly. Fixes bug 5346; bugfix on 0.2.0.2-alpha. Patch from
24439 Esteban Manchado Velázques.
24440 - Make our number-parsing functions always treat too-large values
24441 as an error, even when those values exceed the width of the
24442 underlying type. Previously, if the caller provided these
24443 functions with minima or maxima set to the extreme values of the
24444 underlying integer type, these functions would return those
24445 values on overflow rather than treating overflow as an error.
24446 Fixes part of bug 5786; bugfix on 0.0.9.
24447 - If we hit the error case where routerlist_insert() replaces an
24448 existing (old) server descriptor, make sure to remove that
24449 server descriptor from the old_routers list. Fix related to bug
24450 1776. Bugfix on 0.2.2.18-alpha.
24451 - Clarify the behavior of MaxCircuitDirtiness with hidden service
24452 circuits. Fixes issue 5259.
24454 o Minor bugfixes (coding cleanup, on 0.2.2.x and earlier):
24455 - Prevent a null-pointer dereference when receiving a data cell
24456 for a nonexistent stream when the circuit in question has an
24457 empty deliver window. We don't believe this is triggerable,
24458 since we don't currently allow deliver windows to become empty,
24459 but the logic is tricky enough that it's better to make the code
24460 robust. Fixes bug 5541; bugfix on 0.0.2pre14.
24461 - Fix a memory leak when trying to launch a DNS request when the
24462 network is disabled or the nameservers are unconfigurable. Fixes
24463 bug 5916; bugfix on Tor 0.1.2.1-alpha (for the unconfigurable
24464 nameserver case) and on 0.2.3.9-alpha (for the DisableNetwork case).
24465 - Don't hold a Windows file handle open for every file mapping;
24466 the file mapping handle is sufficient. Fixes bug 5951; bugfix on
24468 - Avoid O(n^2) performance characteristics when parsing a large
24469 extrainfo cache. Fixes bug 5828; bugfix on 0.2.0.1-alpha.
24470 - Format more doubles with %f, not %lf. Patch from grarpamp to make
24471 Tor build correctly on older BSDs again. Fixes bug 3894; bugfix on
24473 - Make our replacement implementation of strtok_r() compatible with
24474 the standard behavior of strtok_r(). Patch by nils. Fixes bug 5091;
24475 bugfix on 0.2.2.1-alpha.
24476 - Fix a NULL-pointer dereference on a badly formed
24477 SETCIRCUITPURPOSE command. Found by mikeyc. Fixes bug 5796;
24478 bugfix on 0.2.2.9-alpha.
24479 - Fix a build warning with Clang 3.1 related to our use of vasprintf.
24480 Fixes bug 5969. Bugfix on 0.2.2.11-alpha.
24481 - Defensively refactor rend_mid_rendezvous() so that protocol
24482 violations and length checks happen in the beginning. Fixes
24484 - Set _WIN32_WINNT to 0x0501 consistently throughout the code, so
24485 that IPv6 stuff will compile on MSVC, and compilation issues
24486 will be easier to track down. Fixes bug 5861.
24488 o Minor bugfixes (correctness, on 0.2.2.x and earlier):
24489 - Exit nodes now correctly report EADDRINUSE and EADDRNOTAVAIL as
24490 resource exhaustion, so that clients can adjust their load to
24491 try other exits. Fixes bug 4710; bugfix on 0.1.0.1-rc, which
24492 started using END_STREAM_REASON_RESOURCELIMIT.
24493 - Don't check for whether the address we're using for outbound
24494 connections has changed until after the outbound connection has
24495 completed. On Windows, getsockname() doesn't succeed until the
24496 connection is finished. Fixes bug 5374; bugfix on 0.1.1.14-alpha.
24497 - If the configuration tries to set MyFamily on a bridge, refuse to
24498 do so, and warn about the security implications. Fixes bug 4657;
24499 bugfix on 0.2.0.3-alpha.
24500 - If the client fails to set a reasonable set of ciphersuites
24501 during its v2 handshake renegotiation, allow the renegotiation to
24502 continue nevertheless (i.e. send all the required certificates).
24503 Fixes bug 4591; bugfix on 0.2.0.20-rc.
24504 - When we receive a SIGHUP and the controller __ReloadTorrcOnSIGHUP
24505 option is set to 0 (which Vidalia version 0.2.16 now does when
24506 a SAVECONF attempt fails), perform other actions that SIGHUP
24507 usually causes (like reopening the logs). Fixes bug 5095; bugfix
24509 - If we fail to write a microdescriptor to the disk cache, do not
24510 continue replacing the old microdescriptor file. Fixes bug 2954;
24511 bugfix on 0.2.2.6-alpha.
24512 - Exit nodes don't need to fetch certificates for authorities that
24513 they don't recognize; only directory authorities, bridges,
24514 and caches need to do that. Fixes part of bug 2297; bugfix on
24516 - Correctly handle checking the permissions on the parent
24517 directory of a control socket in the root directory. Bug found
24518 by Esteban Manchado Velázquez. Fixes bug 5089; bugfix on Tor
24520 - When told to add a bridge with the same digest as a preexisting
24521 bridge but a different addr:port, change the addr:port as
24522 requested. Previously we would not notice the change. Fixes half
24523 of bug 5603; fix on 0.2.2.26-beta.
24524 - End AUTHCHALLENGE error messages (in the control protocol) with
24525 a CRLF. Fixes bug 5760; bugfix on 0.2.2.36 and 0.2.3.13-alpha.
24527 o Minor bugfixes (on 0.2.3.x):
24528 - Turn an assertion (that the number of handshakes received as a
24529 server is not < 1) into a warning. Fixes bug 4873; bugfix on
24531 - Format IPv4 addresses correctly in ADDRMAP events. (Previously,
24532 we had reversed them when the answer was cached.) Fixes bug
24533 5723; bugfix on 0.2.3.1-alpha.
24534 - Work correctly on Linux systems with accept4 support advertised in
24535 their headers, but without accept4 support in the kernel. Fix
24536 by murb. Fixes bug 5762; bugfix on 0.2.3.1-alpha.
24537 - When told to add a bridge with the same addr:port as a preexisting
24538 bridge but a different transport, change the transport as
24539 requested. Previously we would not notice the change. Fixes half
24540 of bug 5603; fix on 0.2.3.2-alpha.
24541 - Avoid a "double-reply" warning when replying to a SOCKS request
24542 with a parse error. Patch from Fabian Keil. Fixes bug 4108;
24543 bugfix on 0.2.3.4-alpha.
24544 - Fix a bug where a bridge authority crashes if it has seen no
24545 directory requests when it's time to write statistics to disk.
24546 Fixes bug 5891; bugfix on 0.2.3.6-alpha. Also fixes bug 5508 in
24548 - Don't try to open non-control listeners when DisableNetwork is set.
24549 Previously, we'd open all listeners, then immediately close them.
24550 Fixes bug 5604; bugfix on 0.2.3.9-alpha.
24551 - Don't abort the managed proxy protocol if the managed proxy
24552 sends us an unrecognized line; ignore it instead. Fixes bug
24553 5910; bugfix on 0.2.3.9-alpha.
24554 - Fix a compile warning in crypto.c when compiling with clang 3.1.
24555 Fixes bug 5969, bugfix on 0.2.3.9-alpha.
24556 - Fix a compilation issue on GNU Hurd, which doesn't have PATH_MAX.
24557 Fixes bug 5355; bugfix on 0.2.3.11-alpha.
24558 - Remove bogus definition of "_WIN32" from src/win32/orconfig.h, to
24559 unbreak the MSVC build. Fixes bug 5858; bugfix on 0.2.3.12-alpha.
24560 - Resolve numerous small warnings and build issues with MSVC. Resolves
24563 o Documentation fixes:
24564 - Improve the manual's documentation for the NT Service command-line
24565 options. Addresses ticket 3964.
24566 - Clarify SessionGroup documentation slightly; resolves ticket 5437.
24567 - Document the changes to the ORPort and DirPort options, and the
24568 fact that {OR/Dir}ListenAddress is now unnecessary (and
24569 therefore deprecated). Resolves ticket 5597.
24572 - Remove the torrc.bridge file: we don't use it for anything, and
24573 it had become badly desynchronized from torrc.sample. Resolves
24577 Changes in version 0.2.2.36 - 2012-05-24
24578 Tor 0.2.2.36 updates the addresses for two of the eight directory
24579 authorities, fixes some potential anonymity and security issues,
24580 and fixes several crash bugs.
24582 Tor 0.2.1.x has reached its end-of-life. Those Tor versions have many
24583 known flaws, and nobody should be using them. You should upgrade. If
24584 you're using a Linux or BSD and its packages are obsolete, stop using
24585 those packages and upgrade anyway.
24587 o Directory authority changes:
24588 - Change IP address for maatuska (v3 directory authority).
24589 - Change IP address for ides (v3 directory authority), and rename
24593 - When building or running with any version of OpenSSL earlier
24594 than 0.9.8s or 1.0.0f, disable SSLv3 support. These OpenSSL
24595 versions have a bug (CVE-2011-4576) in which their block cipher
24596 padding includes uninitialized data, potentially leaking sensitive
24597 information to any peer with whom they make a SSLv3 connection. Tor
24598 does not use SSL v3 by default, but a hostile client or server
24599 could force an SSLv3 connection in order to gain information that
24600 they shouldn't have been able to get. The best solution here is to
24601 upgrade to OpenSSL 0.9.8s or 1.0.0f (or later). But when building
24602 or running with a non-upgraded OpenSSL, we disable SSLv3 entirely
24603 to make sure that the bug can't happen.
24604 - Never use a bridge or a controller-supplied node as an exit, even
24605 if its exit policy allows it. Found by wanoskarnet. Fixes bug
24606 5342. Bugfix on 0.1.1.15-rc (for controller-purpose descriptors)
24607 and 0.2.0.3-alpha (for bridge-purpose descriptors).
24608 - Only build circuits if we have a sufficient threshold of the total
24609 descriptors that are marked in the consensus with the "Exit"
24610 flag. This mitigates an attack proposed by wanoskarnet, in which
24611 all of a client's bridges collude to restrict the exit nodes that
24612 the client knows about. Fixes bug 5343.
24613 - Provide controllers with a safer way to implement the cookie
24614 authentication mechanism. With the old method, if another locally
24615 running program could convince a controller that it was the Tor
24616 process, then that program could trick the controller into telling
24617 it the contents of an arbitrary 32-byte file. The new "SAFECOOKIE"
24618 authentication method uses a challenge-response approach to prevent
24619 this attack. Fixes bug 5185; implements proposal 193.
24622 - Avoid logging uninitialized data when unable to decode a hidden
24623 service descriptor cookie. Fixes bug 5647; bugfix on 0.2.1.5-alpha.
24624 - Avoid a client-side assertion failure when receiving an INTRODUCE2
24625 cell on a general purpose circuit. Fixes bug 5644; bugfix on
24627 - Fix builds when the path to sed, openssl, or sha1sum contains
24628 spaces, which is pretty common on Windows. Fixes bug 5065; bugfix
24630 - Correct our replacements for the timeradd() and timersub() functions
24631 on platforms that lack them (for example, Windows). The timersub()
24632 function is used when expiring circuits, while timeradd() is
24633 currently unused. Bug report and patch by Vektor. Fixes bug 4778;
24634 bugfix on 0.2.2.24-alpha.
24635 - Fix the SOCKET_OK test that we use to tell when socket
24636 creation fails so that it works on Win64. Fixes part of bug 4533;
24637 bugfix on 0.2.2.29-beta. Bug found by wanoskarnet.
24640 - Reject out-of-range times like 23:59:61 in parse_rfc1123_time().
24641 Fixes bug 5346; bugfix on 0.0.8pre3.
24642 - Make our number-parsing functions always treat too-large values
24643 as an error, even when those values exceed the width of the
24644 underlying type. Previously, if the caller provided these
24645 functions with minima or maxima set to the extreme values of the
24646 underlying integer type, these functions would return those
24647 values on overflow rather than treating overflow as an error.
24648 Fixes part of bug 5786; bugfix on 0.0.9.
24649 - Older Linux kernels erroneously respond to strange nmap behavior
24650 by having accept() return successfully with a zero-length
24651 socket. When this happens, just close the connection. Previously,
24652 we would try harder to learn the remote address: but there was
24653 no such remote address to learn, and our method for trying to
24654 learn it was incorrect. Fixes bugs 1240, 4745, and 4747. Bugfix
24655 on 0.1.0.3-rc. Reported and diagnosed by "r1eo".
24656 - Correct parsing of certain date types in parse_http_time().
24657 Without this patch, If-Modified-Since would behave
24658 incorrectly. Fixes bug 5346; bugfix on 0.2.0.2-alpha. Patch from
24659 Esteban Manchado Velázques.
24660 - Change the BridgePassword feature (part of the "bridge community"
24661 design, which is not yet implemented) to use a time-independent
24662 comparison. The old behavior might have allowed an adversary
24663 to use timing to guess the BridgePassword value. Fixes bug 5543;
24664 bugfix on 0.2.0.14-alpha.
24665 - Detect and reject certain misformed escape sequences in
24666 configuration values. Previously, these values would cause us
24667 to crash if received in a torrc file or over an authenticated
24668 control port. Bug found by Esteban Manchado Velázquez, and
24669 independently by Robert Connolly from Matta Consulting who further
24670 noted that it allows a post-authentication heap overflow. Patch
24671 by Alexander Schrijver. Fixes bugs 5090 and 5402 (CVE 2012-1668);
24672 bugfix on 0.2.0.16-alpha.
24673 - Fix a compile warning when using the --enable-openbsd-malloc
24674 configure option. Fixes bug 5340; bugfix on 0.2.0.20-rc.
24675 - During configure, detect when we're building with clang version
24676 3.0 or lower and disable the -Wnormalized=id and -Woverride-init
24677 CFLAGS. clang doesn't support them yet.
24678 - When sending an HTTP/1.1 proxy request, include a Host header.
24679 Fixes bug 5593; bugfix on 0.2.2.1-alpha.
24680 - Fix a NULL-pointer dereference on a badly formed SETCIRCUITPURPOSE
24681 command. Found by mikeyc. Fixes bug 5796; bugfix on 0.2.2.9-alpha.
24682 - If we hit the error case where routerlist_insert() replaces an
24683 existing (old) server descriptor, make sure to remove that
24684 server descriptor from the old_routers list. Fix related to bug
24685 1776. Bugfix on 0.2.2.18-alpha.
24687 o Minor bugfixes (documentation and log messages):
24688 - Fix a typo in a log message in rend_service_rendezvous_has_opened().
24689 Fixes bug 4856; bugfix on Tor 0.0.6.
24690 - Update "ClientOnly" man page entry to explain that there isn't
24691 really any point to messing with it. Resolves ticket 5005.
24692 - Document the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays
24693 directory authority option (introduced in Tor 0.2.2.34).
24694 - Downgrade the "We're missing a certificate" message from notice
24695 to info: people kept mistaking it for a real problem, whereas it
24696 is seldom the problem even when we are failing to bootstrap. Fixes
24697 bug 5067; bugfix on 0.2.0.10-alpha.
24698 - Correctly spell "connect" in a log message on failure to create a
24699 controlsocket. Fixes bug 4803; bugfix on 0.2.2.26-beta.
24700 - Clarify the behavior of MaxCircuitDirtiness with hidden service
24701 circuits. Fixes issue 5259.
24704 - Directory authorities now reject versions of Tor older than
24705 0.2.1.30, and Tor versions between 0.2.2.1-alpha and 0.2.2.20-alpha
24706 inclusive. These versions accounted for only a small fraction of
24707 the Tor network, and have numerous known security issues. Resolves
24709 - Update to the May 1 2012 Maxmind GeoLite Country database.
24712 - When sending or relaying a RELAY_EARLY cell, we used to convert
24713 it to a RELAY cell if the connection was using the v1 link
24714 protocol. This was a workaround for older versions of Tor, which
24715 didn't handle RELAY_EARLY cells properly. Now that all supported
24716 versions can handle RELAY_EARLY cells, and now that we're enforcing
24717 the "no RELAY_EXTEND commands except in RELAY_EARLY cells" rule,
24718 remove this workaround. Addresses bug 4786.
24721 Changes in version 0.2.3.15-alpha - 2012-04-30
24722 Tor 0.2.3.15-alpha fixes a variety of smaller bugs, including making
24723 the development branch build on Windows again.
24725 o Minor bugfixes (on 0.2.2.x and earlier):
24726 - Make sure that there are no unhandled pending TLS errors before
24727 reading from a TLS stream. We had checks in 0.1.0.3-rc, but
24728 lost them in 0.1.0.5-rc when we refactored read_to_buf_tls().
24729 Bugfix on 0.1.0.5-rc; fixes bug 4528.
24730 - Fix an assert that directory authorities could trigger on sighup
24731 during some configuration state transitions. We now don't treat
24732 it as a fatal error when the new descriptor we just generated in
24733 init_keys() isn't accepted. Fixes bug 4438; bugfix on 0.2.1.9-alpha.
24734 - After we pick a directory mirror, we would refuse to use it if
24735 it's in our ExcludeExitNodes list, resulting in mysterious failures
24736 to bootstrap for people who just wanted to avoid exiting from
24737 certain locations. Fixes bug 5623; bugfix on 0.2.2.25-alpha.
24738 - When building with --enable-static-tor on OpenBSD, do not
24739 erroneously attempt to link -lrt. Fixes bug 5103.
24741 o Minor bugfixes (on 0.2.3.x):
24742 - When Tor is built with kernel headers from a recent (last few
24743 years) Linux kernel, do not fail to run on older (pre-2.6.28
24744 Linux kernels). Fixes bug 5112; bugfix on 0.2.3.1-alpha.
24745 - Fix cross-compilation issues with mingw. Bugfixes on 0.2.3.6-alpha
24746 and 0.2.3.12-alpha.
24747 - Fix compilation with miniupnpc version 1.6; patch from
24748 Anthony G. Basile. Fixes bug 5434; bugfix on 0.2.3.12-alpha.
24749 - Fix compilation with MSVC, which had defined MS_WINDOWS. Bugfix
24750 on 0.2.3.13-alpha; found and fixed by Gisle Vanem.
24751 - Fix compilation on platforms without unistd.h, or where environ
24752 is defined in stdlib.h. Fixes bug 5704; bugfix on 0.2.3.13-alpha.
24755 - Directory authorities are now a little more lenient at accepting
24756 older router descriptors, or newer router descriptors that don't
24757 make big changes. This should help ameliorate past and future
24758 issues where routers think they have uploaded valid descriptors,
24759 but the authorities don't think so. Fix for ticket 2479.
24760 - Make the code that clients use to detect an address change be
24761 IPv6-aware, so that it won't fill clients' logs with error
24762 messages when trying to get the IPv4 address of an IPv6
24763 connection. Implements ticket 5537.
24765 o Removed features:
24766 - Remove the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays option;
24767 authorities needed to use it for a while to keep the network working
24768 as people upgraded to 0.2.1.31, 0.2.2.34, or 0.2.3.6-alpha, but
24769 that was six months ago. As of now, it should no longer be needed
24773 Changes in version 0.2.3.14-alpha - 2012-04-23
24774 Tor 0.2.3.14-alpha fixes yet more bugs to get us closer to a release
24775 candidate. It also dramatically speeds up AES: fast relays should
24776 consider switching to the newer OpenSSL library.
24778 o Directory authority changes:
24779 - Change IP address for ides (v3 directory authority), and rename
24783 - Avoid logging uninitialized data when unable to decode a hidden
24784 service descriptor cookie. Fixes bug 5647; bugfix on 0.2.1.5-alpha.
24785 - Avoid a client-side assertion failure when receiving an INTRODUCE2
24786 cell on a general purpose circuit. Fixes bug 5644; bugfix on
24788 - If authorities are unable to get a v2 consensus document from other
24789 directory authorities, they no longer fall back to fetching
24790 them from regular directory caches. Fixes bug 5635; bugfix on
24791 0.2.2.26-beta, where routers stopped downloading v2 consensus
24792 documents entirely.
24793 - When we start a Tor client with a normal consensus already cached,
24794 be willing to download a microdescriptor consensus. Fixes bug 4011;
24795 fix on 0.2.3.1-alpha.
24797 o Major features (performance):
24798 - When built to use OpenSSL 1.0.1, and built for an x86 or x86_64
24799 instruction set, take advantage of OpenSSL's AESNI, bitsliced, or
24800 vectorized AES implementations as appropriate. These can be much,
24801 much faster than other AES implementations.
24803 o Minor bugfixes (0.2.2.x and earlier):
24804 - Don't launch more than 10 service-side introduction-point circuits
24805 for a hidden service in five minutes. Previously, we would consider
24806 launching more introduction-point circuits if at least one second
24807 had passed without any introduction-point circuits failing. Fixes
24808 bug 4607; bugfix on 0.0.7pre1.
24809 - Change the BridgePassword feature (part of the "bridge community"
24810 design, which is not yet implemented) to use a time-independent
24811 comparison. The old behavior might have allowed an adversary
24812 to use timing to guess the BridgePassword value. Fixes bug 5543;
24813 bugfix on 0.2.0.14-alpha.
24814 - Enforce correct return behavior of tor_vsscanf() when the '%%'
24815 pattern is used. Fixes bug 5558. Bugfix on 0.2.1.13.
24816 - When sending an HTTP/1.1 proxy request, include a Host header.
24817 Fixes bug 5593; bugfix on 0.2.2.1-alpha.
24818 - Don't log that we have "decided to publish new relay descriptor"
24819 unless we are actually publishing a descriptor. Fixes bug 3942;
24820 bugfix on 0.2.2.28-beta.
24822 o Minor bugfixes (0.2.3.x):
24823 - Fix a bug where a bridge authority crashes (on a failed assert)
24824 if it has seen no directory requests when it's time to write
24825 statistics to disk. Fixes bug 5508. Bugfix on 0.2.3.6-alpha.
24826 - Fix bug stomping on ORPort option NoListen and ignoring option
24827 NoAdvertise. Fixes bug 5151; bugfix on 0.2.3.9-alpha.
24828 - In the testsuite, provide a large enough buffer in the tor_sscanf
24829 unit test. Otherwise we'd overrun that buffer and crash during
24830 the unit tests. Found by weasel. Fixes bug 5449; bugfix on
24832 - Make sure we create the keys directory if it doesn't exist and we're
24833 about to store the dynamic Diffie-Hellman parameters. Fixes bug
24834 5572; bugfix on 0.2.3.13-alpha.
24835 - Fix a small memory leak when trying to decode incorrect base16
24836 authenticator during SAFECOOKIE authentication. Found by
24837 Coverity Scan. Fixes CID 507. Bugfix on 0.2.3.13-alpha.
24840 - Add more information to a log statement that might help track down
24841 bug 4091. If you're seeing "Bug: tor_addr_is_internal() called with a
24842 non-IP address" messages (or any Bug messages, for that matter!),
24843 please let us know about it.
24844 - Relays now understand an IPv6 address when they get one from a
24845 directory server. Resolves ticket 4875.
24846 - Resolve IPv6 addresses in bridge and entry statistics to country
24847 code "??" which means we at least count them. Resolves ticket 5053;
24848 improves on 0.2.3.9-alpha.
24849 - Update to the April 3 2012 Maxmind GeoLite Country database.
24850 - Begin a doc/state-contents.txt file to explain the contents of
24851 the Tor state file. Fixes bug 2987.
24853 o Default torrc changes:
24854 - Stop listing "socksport 9050" in torrc.sample. We open a socks
24855 port on 9050 by default anyway, so this should not change anything
24857 - Stop mentioning the deprecated *ListenAddress options in
24858 torrc.sample. Fixes bug 5438.
24859 - Document unit of bandwidth related options in sample torrc.
24862 o Removed features:
24863 - The "torify" script no longer supports the "tsocks" socksifier
24864 tool, since tsocks doesn't support DNS and UDP right for Tor.
24865 Everyone should be using torsocks instead. Fixes bugs 3530 and
24866 5180. Based on a patch by "ugh".
24868 o Code refactoring:
24869 - Change the symmetric cipher interface so that creating and
24870 initializing a stream cipher are no longer separate functions.
24871 - Remove all internal support for unpadded RSA. We never used it, and
24872 it would be a bad idea to start.
24875 Changes in version 0.2.3.13-alpha - 2012-03-26
24876 Tor 0.2.3.13-alpha fixes a variety of stability and correctness bugs
24877 in managed pluggable transports, as well as providing other cleanups
24878 that get us closer to a release candidate.
24880 o Directory authority changes:
24881 - Change IP address for maatuska (v3 directory authority).
24884 - Provide controllers with a safer way to implement the cookie
24885 authentication mechanism. With the old method, if another locally
24886 running program could convince a controller that it was the Tor
24887 process, then that program could trick the controller into telling
24888 it the contents of an arbitrary 32-byte file. The new "SAFECOOKIE"
24889 authentication method uses a challenge-response approach to prevent
24890 this attack. Fixes bug 5185, implements proposal 193.
24891 - Never use a bridge or a controller-supplied node as an exit, even
24892 if its exit policy allows it. Found by wanoskarnet. Fixes bug
24893 5342. Bugfix on 0.1.1.15-rc (for controller-purpose descriptors)
24894 and 0.2.0.3-alpha (for bridge-purpose descriptors).
24895 - Only build circuits if we have a sufficient threshold of the total
24896 descriptors that are marked in the consensus with the "Exit"
24897 flag. This mitigates an attack proposed by wanoskarnet, in which
24898 all of a client's bridges collude to restrict the exit nodes that
24899 the client knows about. Fixes bug 5343.
24901 o Major bugfixes (on Tor 0.2.3.x):
24902 - Avoid an assert when managed proxies like obfsproxy are configured,
24903 and we receive HUP signals or setconf attempts too rapidly. This
24904 situation happens most commonly when Vidalia tries to attach to
24905 Tor or tries to configure the Tor it's attached to. Fixes bug 5084;
24906 bugfix on 0.2.3.6-alpha.
24907 - Fix a relay-side pluggable transports bug where managed proxies were
24908 unreachable from the Internet, because Tor asked them to bind on
24909 localhost. Fixes bug 4725; bugfix on 0.2.3.9-alpha.
24910 - Stop discarding command-line arguments when TestingTorNetwork
24911 is set. Discovered by Kevin Bauer. Fixes bug 5373; bugfix on
24912 0.2.3.9-alpha, where task 4552 added support for two layers of
24914 - Resume allowing the unit tests to run in gdb. This was accidentally
24915 made impossible when the DisableDebuggerAttachment option was
24916 introduced. Fixes bug 5448; bugfix on 0.2.3.9-alpha.
24917 - Resume building with nat-pmp support. Fixes bug 4955; bugfix on
24918 0.2.3.11-alpha. Reported by Anthony G. Basile.
24920 o Minor bugfixes (on 0.2.2.x and earlier):
24921 - Ensure we don't cannibalize circuits that are longer than three hops
24922 already, so we don't end up making circuits with 5 or more
24923 hops. Patch contributed by wanoskarnet. Fixes bug 5231; bugfix on
24924 0.1.0.1-rc which introduced cannibalization.
24925 - Detect and reject certain misformed escape sequences in
24926 configuration values. Previously, these values would cause us
24927 to crash if received in a torrc file or over an authenticated
24928 control port. Bug found by Esteban Manchado Velázquez, and
24929 independently by Robert Connolly from Matta Consulting who further
24930 noted that it allows a post-authentication heap overflow. Patch
24931 by Alexander Schrijver. Fixes bugs 5090 and 5402 (CVE 2012-1668);
24932 bugfix on 0.2.0.16-alpha.
24933 - Fix a compile warning when using the --enable-openbsd-malloc
24934 configure option. Fixes bug 5340; bugfix on 0.2.0.20-rc.
24935 - Directory caches no longer refuse to clean out descriptors because
24936 of missing v2 networkstatus documents, unless they're configured
24937 to retrieve v2 networkstatus documents. Fixes bug 4838; bugfix on
24938 0.2.2.26-beta. Patch by Daniel Bryg.
24939 - Update to the latest version of the tinytest unit testing framework.
24940 This includes a couple of bugfixes that can be relevant for
24941 running forked unit tests on Windows, and removes all reserved
24944 o Minor bugfixes (on 0.2.3.x):
24945 - On a failed pipe() call, don't leak file descriptors. Fixes bug
24946 4296; bugfix on 0.2.3.1-alpha.
24947 - Spec conformance: on a v3 handshake, do not send a NETINFO cell
24948 until after we have received a CERTS cell. Fixes bug 4361; bugfix
24949 on 0.2.3.6-alpha. Patch by "frosty".
24950 - When binding to an IPv6 address, set the IPV6_V6ONLY socket
24951 option, so that the IP stack doesn't decide to use it for IPv4
24952 too. Fixes bug 4760; bugfix on 0.2.3.9-alpha.
24953 - Ensure that variables set in Tor's environment cannot override
24954 environment variables that Tor passes to a managed
24955 pluggable-transport proxy. Previously, Tor would pass every
24956 variable in its environment to managed proxies along with the new
24957 ones, in such a way that on many operating systems, the inherited
24958 environment variables would override those which Tor tried to
24959 explicitly set. Bugfix on 0.2.3.12-alpha for most Unixoid systems;
24960 bugfix on 0.2.3.9-alpha for Windows.
24963 - A wide variety of new unit tests by Esteban Manchado Velázquez.
24964 - Shorten links in the tor-exit-notice file. Patch by Christian Kujau.
24965 - Update to the March 6 2012 Maxmind GeoLite Country database.
24968 Changes in version 0.2.3.12-alpha - 2012-02-13
24969 Tor 0.2.3.12-alpha lets fast exit relays scale better, allows clients
24970 to use bridges that run Tor 0.2.2.x, and resolves several big bugs
24971 when Tor is configured to use a pluggable transport like obfsproxy.
24974 - Fix builds when the path to sed, openssl, or sha1sum contains
24975 spaces, which is pretty common on Windows. Fixes bug 5065; bugfix
24977 - Set the SO_REUSEADDR socket option before we call bind() on outgoing
24978 connections. This change should allow busy exit relays to stop
24979 running out of available sockets as quickly. Fixes bug 4950;
24980 bugfix on 0.2.2.26-beta.
24981 - Allow 0.2.3.x clients to use 0.2.2.x bridges. Previously the client
24982 would ask the bridge for microdescriptors, which are only supported
24983 in 0.2.3.x, and then fail to bootstrap when it didn't get the
24984 answers it wanted. Fixes bug 4013; bugfix on 0.2.3.2-alpha.
24985 - Properly set up obfsproxy's environment when in managed mode. The
24986 Tor Browser Bundle needs LD_LIBRARY_PATH to be passed to obfsproxy,
24987 and when you run your Tor as a daemon, there's no HOME. Fixes bugs
24988 5076 and 5082; bugfix on 0.2.3.6-alpha.
24991 - Use the dead_strip option when building Tor on OS X. This reduces
24992 binary size by almost 19% when linking openssl and libevent
24993 statically, which we do for Tor Browser Bundle.
24994 - Fix broken URLs in the sample torrc file, and tell readers about
24995 the OutboundBindAddress, ExitPolicyRejectPrivate, and
24996 PublishServerDescriptor options. Addresses bug 4652.
24997 - Update to the February 7 2012 Maxmind GeoLite Country database.
25000 - Downgrade the "We're missing a certificate" message from notice
25001 to info: people kept mistaking it for a real problem, whereas it
25002 is seldom the problem even when we are failing to bootstrap. Fixes
25003 bug 5067; bugfix on 0.2.0.10-alpha.
25004 - Don't put "TOR_PT_EXTENDED_SERVER_PORT=127.0.0.1:4200" in a
25005 managed pluggable transport server proxy's environment.
25006 Previously, we would put it there, even though Tor doesn't
25007 implement an 'extended server port' yet, and even though Tor
25008 almost certainly isn't listening at that address. For now, we set
25009 it to an empty string to avoid crashing older obfsproxies. Bugfix
25011 - Log the heartbeat message every HeartbeatPeriod seconds, not every
25012 HeartbeatPeriod + 1 seconds. Fixes bug 4942; bugfix on
25013 0.2.3.1-alpha. Bug reported by Scott Bennett.
25014 - Calculate absolute paths correctly on Windows. Fixes bug 4973;
25015 bugfix on 0.2.3.11-alpha.
25016 - Update "ClientOnly" man page entry to explain that there isn't
25017 really any point to messing with it. Resolves ticket 5005.
25018 - Use the correct CVE number for CVE-2011-4576 in our comments and
25019 log messages. Found by "fermenthor". Resolves bug 5066; bugfix on
25022 o Code simplifications and refactoring:
25023 - Use the _WIN32 macro throughout our code to detect Windows.
25024 (Previously we had used the obsolete 'WIN32' and the idiosyncratic
25028 Changes in version 0.2.3.11-alpha - 2012-01-22
25029 Tor 0.2.3.11-alpha marks feature-freeze for the 0.2.3 tree. It deploys
25030 the last step of the plan to limit maximum circuit length, includes
25031 a wide variety of hidden service performance and correctness fixes,
25032 works around an OpenSSL security flaw if your distro is too stubborn
25033 to upgrade, and fixes a bunch of smaller issues.
25036 - Now that Tor 0.2.0.x is completely deprecated, enable the final
25037 part of "Proposal 110: Avoiding infinite length circuits" by
25038 refusing all circuit-extend requests that do not use a relay_early
25039 cell. This change helps Tor resist a class of denial-of-service
25040 attacks by limiting the maximum circuit length.
25041 - Adjust the number of introduction points that a hidden service
25042 will try to maintain based on how long its introduction points
25043 remain in use and how many introductions they handle. Fixes
25045 - Try to use system facilities for enumerating local interface
25046 addresses, before falling back to our old approach (which was
25047 binding a UDP socket, and calling getsockname() on it). That
25048 approach was scaring OS X users whose draconian firewall
25049 software warned about binding to UDP sockets, regardless of
25050 whether packets were sent. Now we try to use getifaddrs(),
25051 SIOCGIFCONF, or GetAdaptersAddresses(), depending on what the
25052 system supports. Resolves ticket 1827.
25054 o Major security workaround:
25055 - When building or running with any version of OpenSSL earlier
25056 than 0.9.8s or 1.0.0f, disable SSLv3 support. These OpenSSL
25057 versions have a bug (CVE-2011-4576) in which their block cipher
25058 padding includes uninitialized data, potentially leaking sensitive
25059 information to any peer with whom they make a SSLv3 connection. Tor
25060 does not use SSL v3 by default, but a hostile client or server
25061 could force an SSLv3 connection in order to gain information that
25062 they shouldn't have been able to get. The best solution here is to
25063 upgrade to OpenSSL 0.9.8s or 1.0.0f (or later). But when building
25064 or running with a non-upgraded OpenSSL, we disable SSLv3 entirely
25065 to make sure that the bug can't happen.
25068 - Fix the SOCKET_OK test that we use to tell when socket
25069 creation fails so that it works on Win64. Fixes part of bug 4533;
25070 bugfix on 0.2.2.29-beta. Bug found by wanoskarnet.
25071 - Correct our replacements for the timeradd() and timersub() functions
25072 on platforms that lack them (for example, Windows). The timersub()
25073 function is used when expiring circuits, while timeradd() is
25074 currently unused. Bug report and patch by Vektor. Fixes bug 4778;
25075 bugfix on 0.2.2.24-alpha and 0.2.3.1-alpha.
25076 - Do not use OpenSSL 1.0.0's counter mode: it has a critical bug
25077 that was fixed in OpenSSL 1.0.0a. We test for the counter mode
25078 bug at runtime, not compile time, because some distributions hack
25079 their OpenSSL to mis-report its version. Fixes bug 4779; bugfix
25080 on 0.2.3.9-alpha. Found by Pascal.
25082 o Minor features (controller):
25083 - Use absolute path names when reporting the torrc filename in the
25084 control protocol, so a controller can more easily find the torrc
25085 file. Resolves bug 1101.
25086 - Extend the control protocol to report flags that control a circuit's
25087 path selection in CIRC events and in replies to 'GETINFO
25088 circuit-status'. Implements part of ticket 2411.
25089 - Extend the control protocol to report the hidden service address
25090 and current state of a hidden-service-related circuit in CIRC
25091 events and in replies to 'GETINFO circuit-status'. Implements part
25093 - When reporting the path to the cookie file to the controller,
25094 give an absolute path. Resolves ticket 4881.
25095 - Allow controllers to request an event notification whenever a
25096 circuit is cannibalized or its purpose is changed. Implements
25097 part of ticket 3457.
25098 - Include the creation time of a circuit in CIRC and CIRC2
25099 control-port events and the list produced by the 'GETINFO
25100 circuit-status' control-port command.
25102 o Minor features (directory authorities):
25103 - Directory authorities now reject versions of Tor older than
25104 0.2.1.30, and Tor versions between 0.2.2.1-alpha and 0.2.2.20-alpha
25105 inclusive. These versions accounted for only a small fraction of
25106 the Tor network, and have numerous known security issues. Resolves
25108 - Authority operators can now vote for all relays in a given
25109 set of countries to be BadDir/BadExit/Invalid/Rejected.
25110 - Provide two consensus parameters (FastFlagMinThreshold and
25111 FastFlagMaxThreshold) to control the range of allowable bandwidths
25112 for the Fast directory flag. These allow authorities to run
25113 experiments on appropriate requirements for being a "Fast" node.
25114 The AuthDirFastGuarantee config value still applies. Implements
25116 - Document the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays
25117 directory authority option (introduced in Tor 0.2.2.34).
25119 o Minor features (other):
25120 - Don't disable the DirPort when we cannot exceed our AccountingMax
25121 limit during this interval because the effective bandwidthrate is
25122 low enough. This is useful in a situation where AccountMax is only
25123 used as an additional safeguard or to provide statistics.
25124 - Prepend an informative header to generated dynamic_dh_params files.
25125 - If EntryNodes are given, but UseEntryGuards is set to 0, warn that
25126 EntryNodes will have no effect. Resolves issue 2571.
25127 - Log more useful messages when we fail to disable debugger
25129 - Log which authority we're missing votes from when we go to fetch
25130 them from the other auths.
25131 - Log (at debug level) whenever a circuit's purpose is changed.
25132 - Add missing documentation for the MaxClientCircuitsPending,
25133 UseMicrodescriptors, UserspaceIOCPBuffers, and
25134 _UseFilteringSSLBufferevents options, all introduced during
25135 the 0.2.3.x series.
25136 - Update to the January 3 2012 Maxmind GeoLite Country database.
25138 o Minor bugfixes (hidden services):
25139 - Don't close hidden service client circuits which have almost
25140 finished connecting to their destination when they reach
25141 the normal circuit-build timeout. Previously, we would close
25142 introduction circuits which are waiting for an acknowledgement
25143 from the introduction point, and rendezvous circuits which have
25144 been specified in an INTRODUCE1 cell sent to a hidden service,
25145 after the normal CBT. Now, we mark them as 'timed out', and launch
25146 another rendezvous attempt in parallel. This behavior change can
25147 be disabled using the new CloseHSClientCircuitsImmediatelyOnTimeout
25148 option. Fixes part of bug 1297; bugfix on 0.2.2.2-alpha.
25149 - Don't close hidden-service-side rendezvous circuits when they
25150 reach the normal circuit-build timeout. This behavior change can
25151 be disabled using the new
25152 CloseHSServiceRendCircuitsImmediatelyOnTimeout option. Fixes the
25153 remaining part of bug 1297; bugfix on 0.2.2.2-alpha.
25154 - Make sure we never mark the wrong rendezvous circuit as having
25155 had its introduction cell acknowledged by the introduction-point
25156 relay. Previously, when we received an INTRODUCE_ACK cell on a
25157 client-side hidden-service introduction circuit, we might have
25158 marked a rendezvous circuit other than the one we specified in
25159 the INTRODUCE1 cell as INTRO_ACKED, which would have produced
25160 a warning message and interfered with the hidden service
25161 connection-establishment process. Fixes bug 4759; bugfix on
25162 0.2.3.3-alpha, when we added the stream-isolation feature which
25163 might cause Tor to open multiple rendezvous circuits for the same
25165 - Don't trigger an assertion failure when we mark a new client-side
25166 hidden-service introduction circuit for close during the process
25167 of creating it. Fixes bug 4796; bugfix on 0.2.3.6-alpha. Reported
25170 o Minor bugfixes (log messages):
25171 - Correctly spell "connect" in a log message on failure to create a
25172 controlsocket. Fixes bug 4803; bugfix on 0.2.2.26-beta and
25174 - Fix a typo in a log message in rend_service_rendezvous_has_opened().
25175 Fixes bug 4856; bugfix on Tor 0.0.6.
25176 - Fix the log message describing how we work around discovering
25177 that our version is the ill-fated OpenSSL 0.9.8l. Fixes bug
25178 4837; bugfix on 0.2.2.9-alpha.
25179 - When logging about a disallowed .exit name, do not also call it
25180 an "invalid onion address". Fixes bug 3325; bugfix on 0.2.2.9-alpha.
25182 o Minor bugfixes (build fixes):
25183 - During configure, detect when we're building with clang version
25184 3.0 or lower and disable the -Wnormalized=id and -Woverride-init
25185 CFLAGS. clang doesn't support them yet.
25186 - During configure, search for library containing cos function as
25187 libm lives in libcore on some platforms (BeOS/Haiku). Linking
25188 against libm was hard-coded before. Fixes the first part of bug
25189 4727; bugfix on 0.2.2.2-alpha. Patch and analysis by Martin Hebnes
25191 - Detect attempts to build Tor on (as yet hypothetical) versions
25192 of Windows where sizeof(intptr_t) != sizeof(SOCKET). Partial
25193 fix for bug 4533. Bugfix on 0.2.2.28-beta.
25194 - Preprocessor directives should not be put inside the arguments
25195 of a macro. This would break compilation with GCC releases prior
25196 to version 3.3. We would never recommend such an old GCC version,
25197 but it is apparently required for binary compatibility on some
25198 platforms (namely, certain builds of Haiku). Fixes the other part
25199 of bug 4727; bugfix on 0.2.3.3-alpha. Patch and analysis by Martin
25202 o Minor bugfixes (other):
25203 - Older Linux kernels erroneously respond to strange nmap behavior
25204 by having accept() return successfully with a zero-length
25205 socket. When this happens, just close the connection. Previously,
25206 we would try harder to learn the remote address: but there was
25207 no such remote address to learn, and our method for trying to
25208 learn it was incorrect. Fixes bugs 1240, 4745, and 4747. Bugfix
25209 on 0.1.0.3-rc. Reported and diagnosed by "r1eo".
25210 - Fix null-pointer access that could occur if TLS allocation failed.
25211 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un". This was
25212 erroneously listed as fixed in 0.2.3.9-alpha, but the fix had
25213 accidentally been reverted.
25214 - Fix our implementation of crypto_random_hostname() so it can't
25215 overflow on ridiculously large inputs. (No Tor version has ever
25216 provided this kind of bad inputs, but let's be correct in depth.)
25217 Fixes bug 4413; bugfix on 0.2.2.9-alpha. Fix by Stephen Palmateer.
25218 - Find more places in the code that should have been testing for
25219 invalid sockets using the SOCKET_OK macro. Required for a fix
25220 for bug 4533. Bugfix on 0.2.2.28-beta.
25221 - Fix an assertion failure when, while running with bufferevents, a
25222 connection finishes connecting after it is marked for close, but
25223 before it is closed. Fixes bug 4697; bugfix on 0.2.3.1-alpha.
25224 - test_util_spawn_background_ok() hardcoded the expected value
25225 for ENOENT to 2. This isn't portable as error numbers are
25226 platform specific, and particularly the hurd has ENOENT at
25227 0x40000002. Construct expected string at runtime, using the correct
25228 value for ENOENT. Fixes bug 4733; bugfix on 0.2.3.1-alpha.
25229 - Reject attempts to disable DisableDebuggerAttachment while Tor is
25230 running. Fixes bug 4650; bugfix on 0.2.3.9-alpha.
25231 - Use an appropriate-width type for sockets in tor-fw-helper on
25232 win64. Fixes bug 1983 at last. Bugfix on 0.2.3.9-alpha.
25235 - When sending or relaying a RELAY_EARLY cell, we used to convert
25236 it to a RELAY cell if the connection was using the v1 link
25237 protocol. This was a workaround for older versions of Tor, which
25238 didn't handle RELAY_EARLY cells properly. Now that all supported
25239 versions can handle RELAY_EARLY cells, and now that we're enforcing
25240 the "no RELAY_EXTEND commands except in RELAY_EARLY cells" rule,
25241 remove this workaround. Addresses bug 4786.
25243 o Code simplifications and refactoring:
25244 - Use OpenSSL's built-in SSL_state_string_long() instead of our
25245 own homebrewed ssl_state_to_string() replacement. Patch from
25246 Emile Snyder. Fixes bug 4653.
25247 - Use macros to indicate OpenSSL versions, so we don't need to worry
25248 about accidental hexadecimal bit shifts.
25249 - Remove some workaround code for OpenSSL 0.9.6 (which is no longer
25251 - Convert more instances of tor_snprintf+tor_strdup into tor_asprintf.
25252 - Use the smartlist_add_asprintf() alias more consistently.
25253 - Use a TOR_INVALID_SOCKET macro when initializing a socket to an
25254 invalid value, rather than just -1.
25255 - Rename a handful of old identifiers, mostly related to crypto
25256 structures and crypto functions. By convention, our "create an
25257 object" functions are called "type_new()", our "free an object"
25258 functions are called "type_free()", and our types indicate that
25259 they are types only with a final "_t". But a handful of older
25260 types and functions broke these rules, with function names like
25261 "type_create" or "subsystem_op_type", or with type names like
25265 Changes in version 0.2.3.10-alpha - 2011-12-16
25266 Tor 0.2.3.10-alpha fixes a critical heap-overflow security issue in
25267 Tor's buffers code. Absolutely everybody should upgrade.
25269 The bug relied on an incorrect calculation when making data continuous
25270 in one of our IO buffers, if the first chunk of the buffer was
25271 misaligned by just the wrong amount. The miscalculation would allow an
25272 attacker to overflow a piece of heap-allocated memory. To mount this
25273 attack, the attacker would need to either open a SOCKS connection to
25274 Tor's SocksPort (usually restricted to localhost), or target a Tor
25275 instance configured to make its connections through a SOCKS proxy
25276 (which Tor does not do by default).
25278 Good security practice requires that all heap-overflow bugs should be
25279 presumed to be exploitable until proven otherwise, so we are treating
25280 this as a potential code execution attack. Please upgrade immediately!
25281 This bug does not affect bufferevents-based builds of Tor. Special
25282 thanks to "Vektor" for reporting this issue to us!
25284 This release also contains a few minor bugfixes for issues discovered
25288 - Fix a heap overflow bug that could occur when trying to pull
25289 data into the first chunk of a buffer, when that chunk had
25290 already had some data drained from it. Fixes CVE-2011-2778;
25291 bugfix on 0.2.0.16-alpha. Reported by "Vektor".
25294 - If we can't attach streams to a rendezvous circuit when we
25295 finish connecting to a hidden service, clear the rendezvous
25296 circuit's stream-isolation state and try to attach streams
25297 again. Previously, we cleared rendezvous circuits' isolation
25298 state either too early (if they were freshly built) or not at all
25299 (if they had been built earlier and were cannibalized). Bugfix on
25300 0.2.3.3-alpha; fixes bug 4655.
25301 - Fix compilation of the libnatpmp helper on non-Windows. Bugfix on
25302 0.2.3.9-alpha; fixes bug 4691. Reported by Anthony G. Basile.
25303 - Fix an assertion failure when a relay with accounting enabled
25304 starts up while dormant. Fixes bug 4702; bugfix on 0.2.3.9-alpha.
25307 - Update to the December 6 2011 Maxmind GeoLite Country database.
25310 Changes in version 0.2.2.35 - 2011-12-16
25311 Tor 0.2.2.35 fixes a critical heap-overflow security issue in Tor's
25312 buffers code. Absolutely everybody should upgrade.
25314 The bug relied on an incorrect calculation when making data continuous
25315 in one of our IO buffers, if the first chunk of the buffer was
25316 misaligned by just the wrong amount. The miscalculation would allow an
25317 attacker to overflow a piece of heap-allocated memory. To mount this
25318 attack, the attacker would need to either open a SOCKS connection to
25319 Tor's SocksPort (usually restricted to localhost), or target a Tor
25320 instance configured to make its connections through a SOCKS proxy
25321 (which Tor does not do by default).
25323 Good security practice requires that all heap-overflow bugs should be
25324 presumed to be exploitable until proven otherwise, so we are treating
25325 this as a potential code execution attack. Please upgrade immediately!
25326 This bug does not affect bufferevents-based builds of Tor. Special
25327 thanks to "Vektor" for reporting this issue to us!
25329 Tor 0.2.2.35 also fixes several bugs in previous versions, including
25330 crash bugs for unusual configurations, and a long-term bug that
25331 would prevent Tor from starting on Windows machines with draconian
25334 With this release, we remind everyone that 0.2.0.x has reached its
25335 formal end-of-life. Those Tor versions have many known flaws, and
25336 nobody should be using them. You should upgrade -- ideally to the
25337 0.2.2.x series. If you're using a Linux or BSD and its packages are
25338 obsolete, stop using those packages and upgrade anyway.
25340 The Tor 0.2.1.x series is also approaching its end-of-life: it will no
25341 longer receive support after some time in early 2012.
25344 - Fix a heap overflow bug that could occur when trying to pull
25345 data into the first chunk of a buffer, when that chunk had
25346 already had some data drained from it. Fixes CVE-2011-2778;
25347 bugfix on 0.2.0.16-alpha. Reported by "Vektor".
25348 - Initialize Libevent with the EVENT_BASE_FLAG_NOLOCK flag enabled, so
25349 that it doesn't attempt to allocate a socketpair. This could cause
25350 some problems on Windows systems with overzealous firewalls. Fix for
25351 bug 4457; workaround for Libevent versions 2.0.1-alpha through
25353 - If we mark an OR connection for close based on a cell we process,
25354 don't process any further cells on it. We already avoid further
25355 reads on marked-for-close connections, but now we also discard the
25356 cells we'd already read. Fixes bug 4299; bugfix on 0.2.0.10-alpha,
25357 which was the first version where we might mark a connection for
25358 close based on processing a cell on it.
25359 - Correctly sanity-check that we don't underflow on a memory
25360 allocation (and then assert) for hidden service introduction
25361 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
25362 bugfix on 0.2.1.5-alpha.
25363 - Fix a memory leak when we check whether a hidden service
25364 descriptor has any usable introduction points left. Fixes bug
25365 4424. Bugfix on 0.2.2.25-alpha.
25366 - Don't crash when we're running as a relay and don't have a GeoIP
25367 file. Bugfix on 0.2.2.34; fixes bug 4340. This backports a fix
25368 we've had in the 0.2.3.x branch already.
25369 - When running as a client, do not print a misleading (and plain
25370 wrong) log message that we're collecting "directory request"
25371 statistics: clients don't collect statistics. Also don't create a
25372 useless (because empty) stats file in the stats/ directory. Fixes
25373 bug 4353; bugfix on 0.2.2.34.
25376 - Detect failure to initialize Libevent. This fix provides better
25377 detection for future instances of bug 4457.
25378 - Avoid frequent calls to the fairly expensive cull_wedged_cpuworkers
25379 function. This was eating up hideously large amounts of time on some
25380 busy servers. Fixes bug 4518; bugfix on 0.0.9.8.
25381 - Resolve an integer overflow bug in smartlist_ensure_capacity().
25382 Fixes bug 4230; bugfix on Tor 0.1.0.1-rc. Based on a patch by
25384 - Don't warn about unused log_mutex in log.c when building with
25385 --disable-threads using a recent GCC. Fixes bug 4437; bugfix on
25386 0.1.0.6-rc which introduced --disable-threads.
25387 - When configuring, starting, or stopping an NT service, stop
25388 immediately after the service configuration attempt has succeeded
25389 or failed. Fixes bug 3963; bugfix on 0.2.0.7-alpha.
25390 - When sending a NETINFO cell, include the original address
25391 received for the other side, not its canonical address. Found
25392 by "troll_un"; fixes bug 4349; bugfix on 0.2.0.10-alpha.
25393 - Fix a typo in a hibernation-related log message. Fixes bug 4331;
25394 bugfix on 0.2.2.23-alpha; found by "tmpname0901".
25395 - Fix a memory leak in launch_direct_bridge_descriptor_fetch() that
25396 occurred when a client tried to fetch a descriptor for a bridge
25397 in ExcludeNodes. Fixes bug 4383; bugfix on 0.2.2.25-alpha.
25398 - Backport fixes for a pair of compilation warnings on Windows.
25399 Fixes bug 4521; bugfix on 0.2.2.28-beta and on 0.2.2.29-beta.
25400 - If we had ever tried to call tor_addr_to_str on an address of
25401 unknown type, we would have done a strdup on an uninitialized
25402 buffer. Now we won't. Fixes bug 4529; bugfix on 0.2.1.3-alpha.
25403 Reported by "troll_un".
25404 - Correctly detect and handle transient lookup failures from
25405 tor_addr_lookup. Fixes bug 4530; bugfix on 0.2.1.5-alpha.
25406 Reported by "troll_un".
25407 - Fix null-pointer access that could occur if TLS allocation failed.
25408 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un".
25409 - Use tor_socket_t type for listener argument to accept(). Fixes bug
25410 4535; bugfix on 0.2.2.28-beta. Found by "troll_un".
25413 - Add two new config options for directory authorities:
25414 AuthDirFastGuarantee sets a bandwidth threshold for guaranteeing the
25415 Fast flag, and AuthDirGuardBWGuarantee sets a bandwidth threshold
25416 that is always sufficient to satisfy the bandwidth requirement for
25417 the Guard flag. Now it will be easier for researchers to simulate
25418 Tor networks with different values. Resolves ticket 4484.
25419 - When Tor ignores a hidden service specified in its configuration,
25420 include the hidden service's directory in the warning message.
25421 Previously, we would only tell the user that some hidden service
25422 was ignored. Bugfix on 0.0.6; fixes bug 4426.
25423 - Update to the December 6 2011 Maxmind GeoLite Country database.
25425 o Packaging changes:
25426 - Make it easier to automate expert package builds on Windows,
25427 by removing an absolute path from makensis.exe command.
25430 Changes in version 0.2.1.32 - 2011-12-16
25431 Tor 0.2.1.32 backports important security and privacy fixes for
25432 oldstable. This release is intended only for package maintainers and
25433 others who cannot use the 0.2.2 stable series. All others should be
25434 using Tor 0.2.2.x or newer.
25436 The Tor 0.2.1.x series will reach formal end-of-life some time in
25437 early 2012; we will stop releasing patches for it then.
25439 o Major bugfixes (also included in 0.2.2.x):
25440 - Correctly sanity-check that we don't underflow on a memory
25441 allocation (and then assert) for hidden service introduction
25442 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
25443 bugfix on 0.2.1.5-alpha.
25444 - Fix a heap overflow bug that could occur when trying to pull
25445 data into the first chunk of a buffer, when that chunk had
25446 already had some data drained from it. Fixes CVE-2011-2778;
25447 bugfix on 0.2.0.16-alpha. Reported by "Vektor".
25450 - Update to the December 6 2011 Maxmind GeoLite Country database.
25453 Changes in version 0.2.3.9-alpha - 2011-12-08
25454 Tor 0.2.3.9-alpha introduces initial IPv6 support for bridges, adds
25455 a "DisableNetwork" security feature that bundles can use to avoid
25456 touching the network until bridges are configured, moves forward on
25457 the pluggable transport design, fixes a flaw in the hidden service
25458 design that unnecessarily prevented clients with wrong clocks from
25459 reaching hidden services, and fixes a wide variety of other issues.
25462 - Clients can now connect to private bridges over IPv6. Bridges
25463 still need at least one IPv4 address in order to connect to
25464 other relays. Note that we don't yet handle the case where the
25465 user has two bridge lines for the same bridge (one IPv4, one
25466 IPv6). Implements parts of proposal 186.
25467 - New "DisableNetwork" config option to prevent Tor from launching any
25468 connections or accepting any connections except on a control port.
25469 Bundles and controllers can set this option before letting Tor talk
25470 to the rest of the network, for example to prevent any connections
25471 to a non-bridge address. Packages like Orbot can also use this
25472 option to instruct Tor to save power when the network is off.
25473 - Clients and bridges can now be configured to use a separate
25474 "transport" proxy. This approach makes the censorship arms race
25475 easier by allowing bridges to use protocol obfuscation plugins. It
25476 implements the "managed proxy" part of proposal 180 (ticket 3472).
25477 - When using OpenSSL 1.0.0 or later, use OpenSSL's counter mode
25478 implementation. It makes AES_CTR about 7% faster than our old one
25479 (which was about 10% faster than the one OpenSSL used to provide).
25480 Resolves ticket 4526.
25481 - Add a "tor2web mode" for clients that want to connect to hidden
25482 services non-anonymously (and possibly more quickly). As a safety
25483 measure to try to keep users from turning this on without knowing
25484 what they are doing, tor2web mode must be explicitly enabled at
25485 compile time, and a copy of Tor compiled to run in tor2web mode
25486 cannot be used as a normal Tor client. Implements feature 2553.
25487 - Add experimental support for running on Windows with IOCP and no
25488 kernel-space socket buffers. This feature is controlled by a new
25489 "UserspaceIOCPBuffers" config option (off by default), which has
25490 no effect unless Tor has been built with support for bufferevents,
25491 is running on Windows, and has enabled IOCP. This may, in the long
25492 run, help solve or mitigate bug 98.
25493 - Use a more secure consensus parameter voting algorithm. Now at
25494 least three directory authorities or a majority of them must
25495 vote on a given parameter before it will be included in the
25496 consensus. Implements proposal 178.
25499 - Hidden services now ignore the timestamps on INTRODUCE2 cells.
25500 They used to check that the timestamp was within 30 minutes
25501 of their system clock, so they could cap the size of their
25502 replay-detection cache, but that approach unnecessarily refused
25503 service to clients with wrong clocks. Bugfix on 0.2.1.6-alpha, when
25504 the v3 intro-point protocol (the first one which sent a timestamp
25505 field in the INTRODUCE2 cell) was introduced; fixes bug 3460.
25506 - Only use the EVP interface when AES acceleration is enabled,
25507 to avoid a 5-7% performance regression. Resolves issue 4525;
25508 bugfix on 0.2.3.8-alpha.
25510 o Privacy/anonymity features (bridge detection):
25511 - Make bridge SSL certificates a bit more stealthy by using random
25512 serial numbers, in the same fashion as OpenSSL when generating
25513 self-signed certificates. Implements ticket 4584.
25514 - Introduce a new config option "DynamicDHGroups", enabled by
25515 default, which provides each bridge with a unique prime DH modulus
25516 to be used during SSL handshakes. This option attempts to help
25517 against censors who might use the Apache DH modulus as a static
25518 identifier for bridges. Addresses ticket 4548.
25520 o Minor features (new/different config options):
25521 - New configuration option "DisableDebuggerAttachment" (on by default)
25522 to prevent basic debugging attachment attempts by other processes.
25523 Supports Mac OS X and Gnu/Linux. Resolves ticket 3313.
25524 - Allow MapAddress directives to specify matches against super-domains,
25525 as in "MapAddress *.torproject.org *.torproject.org.torserver.exit".
25526 Implements issue 933.
25527 - Slightly change behavior of "list" options (that is, config
25528 options that can appear more than once) when they appear both in
25529 torrc and on the command line. Previously, the command-line options
25530 would be appended to the ones from torrc. Now, the command-line
25531 options override the torrc options entirely. This new behavior
25532 allows the user to override list options (like exit policies and
25533 ports to listen on) from the command line, rather than simply
25534 appending to the list.
25535 - You can get the old (appending) command-line behavior for "list"
25536 options by prefixing the option name with a "+".
25537 - You can remove all the values for a "list" option from the command
25538 line without adding any new ones by prefixing the option name
25540 - Add experimental support for a "defaults" torrc file to be parsed
25541 before the regular torrc. Torrc options override the defaults file's
25542 options in the same way that the command line overrides the torrc.
25543 The SAVECONF controller command saves only those options which
25544 differ between the current configuration and the defaults file. HUP
25545 reloads both files. (Note: This is an experimental feature; its
25546 behavior will probably be refined in future 0.2.3.x-alpha versions
25547 to better meet packagers' needs.) Implements task 4552.
25550 - Try to make the introductory warning message that Tor prints on
25551 startup more useful for actually finding help and information.
25552 Resolves ticket 2474.
25553 - Running "make version" now displays the version of Tor that
25554 we're about to build. Idea from katmagic; resolves issue 4400.
25555 - Expire old or over-used hidden service introduction points.
25556 Required by fix for bug 3460.
25557 - Move the replay-detection cache for the RSA-encrypted parts of
25558 INTRODUCE2 cells to the introduction point data structures.
25559 Previously, we would use one replay-detection cache per hidden
25560 service. Required by fix for bug 3460.
25561 - Reduce the lifetime of elements of hidden services' Diffie-Hellman
25562 public key replay-detection cache from 60 minutes to 5 minutes. This
25563 replay-detection cache is now used only to detect multiple
25564 INTRODUCE2 cells specifying the same rendezvous point, so we can
25565 avoid launching multiple simultaneous attempts to connect to it.
25567 o Minor bugfixes (on Tor 0.2.2.x and earlier):
25568 - Resolve an integer overflow bug in smartlist_ensure_capacity().
25569 Fixes bug 4230; bugfix on Tor 0.1.0.1-rc. Based on a patch by
25571 - Fix a minor formatting issue in one of tor-gencert's error messages.
25573 - Prevent a false positive from the check-spaces script, by disabling
25574 the "whitespace between function name and (" check for functions
25576 - Fix a log message suggesting that people contact a non-existent
25577 email address. Fixes bug 3448.
25578 - Fix null-pointer access that could occur if TLS allocation failed.
25579 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un".
25580 - Report a real bootstrap problem to the controller on router
25581 identity mismatch. Previously we just said "foo", which probably
25582 made a lot of sense at the time. Fixes bug 4169; bugfix on
25584 - If we had ever tried to call tor_addr_to_str() on an address of
25585 unknown type, we would have done a strdup() on an uninitialized
25586 buffer. Now we won't. Fixes bug 4529; bugfix on 0.2.1.3-alpha.
25587 Reported by "troll_un".
25588 - Correctly detect and handle transient lookup failures from
25589 tor_addr_lookup(). Fixes bug 4530; bugfix on 0.2.1.5-alpha.
25590 Reported by "troll_un".
25591 - Use tor_socket_t type for listener argument to accept(). Fixes bug
25592 4535; bugfix on 0.2.2.28-beta. Found by "troll_un".
25593 - Initialize conn->addr to a valid state in spawn_cpuworker(). Fixes
25594 bug 4532; found by "troll_un".
25596 o Minor bugfixes (on Tor 0.2.3.x):
25597 - Fix a compile warning in tor_inet_pton(). Bugfix on 0.2.3.8-alpha;
25599 - Don't send two ESTABLISH_RENDEZVOUS cells when opening a new
25600 circuit for use as a hidden service client's rendezvous point.
25601 Fixes bugs 4641 and 4171; bugfix on 0.2.3.3-alpha. Diagnosed
25602 with help from wanoskarnet.
25603 - Restore behavior of overriding SocksPort, ORPort, and similar
25604 options from the command line. Bugfix on 0.2.3.3-alpha.
25607 - Properly handle the case where the build-tree is not the same
25608 as the source tree when generating src/common/common_sha1.i,
25609 src/or/micro-revision.i, and src/or/or_sha1.i. Fixes bug 3953;
25610 bugfix on 0.2.0.1-alpha.
25612 o Code simplifications, cleanups, and refactorings:
25613 - Remove the pure attribute from all functions that used it
25614 previously. In many cases we assigned it incorrectly, because the
25615 functions might assert or call impure functions, and we don't have
25616 evidence that keeping the pure attribute is worthwhile. Implements
25617 changes suggested in ticket 4421.
25618 - Remove some dead code spotted by coverity. Fixes cid 432.
25619 Bugfix on 0.2.3.1-alpha, closes bug 4637.
25622 Changes in version 0.2.3.8-alpha - 2011-11-22
25623 Tor 0.2.3.8-alpha fixes some crash and assert bugs, including a
25624 socketpair-related bug that has been bothering Windows users. It adds
25625 support to serve microdescriptors to controllers, so Vidalia's network
25626 map can resume listing relays (once Vidalia implements its side),
25627 and adds better support for hardware AES acceleration. Finally, it
25628 starts the process of adjusting the bandwidth cutoff for getting the
25629 "Fast" flag from 20KB to (currently) 32KB -- preliminary results show
25630 that tiny relays harm performance more than they help network capacity.
25633 - Initialize Libevent with the EVENT_BASE_FLAG_NOLOCK flag enabled, so
25634 that it doesn't attempt to allocate a socketpair. This could cause
25635 some problems on Windows systems with overzealous firewalls. Fix for
25636 bug 4457; workaround for Libevent versions 2.0.1-alpha through
25638 - Correctly sanity-check that we don't underflow on a memory
25639 allocation (and then assert) for hidden service introduction
25640 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
25641 bugfix on 0.2.1.5-alpha.
25642 - Remove the artificially low cutoff of 20KB to guarantee the Fast
25643 flag. In the past few years the average relay speed has picked
25644 up, and while the "top 7/8 of the network get the Fast flag" and
25645 "all relays with 20KB or more of capacity get the Fast flag" rules
25646 used to have the same result, now the top 7/8 of the network has
25647 a capacity more like 32KB. Bugfix on 0.2.1.14-rc. Fixes bug 4489.
25648 - Fix a rare assertion failure when checking whether a v0 hidden
25649 service descriptor has any usable introduction points left, and
25650 we don't have enough information to build a circuit to the first
25651 intro point named in the descriptor. The HS client code in
25652 0.2.3.x no longer uses v0 HS descriptors, but this assertion can
25653 trigger on (and crash) v0 HS authorities. Fixes bug 4411.
25654 Bugfix on 0.2.3.1-alpha; diagnosed by frosty_un.
25655 - Make bridge authorities not crash when they are asked for their own
25656 descriptor. Bugfix on 0.2.3.7-alpha, reported by Lucky Green.
25657 - When running as a client, do not print a misleading (and plain
25658 wrong) log message that we're collecting "directory request"
25659 statistics: clients don't collect statistics. Also don't create a
25660 useless (because empty) stats file in the stats/ directory. Fixes
25661 bug 4353; bugfix on 0.2.2.34 and 0.2.3.7-alpha.
25664 - Allow Tor controllers like Vidalia to obtain the microdescriptor
25665 for a relay by identity digest or nickname. Previously,
25666 microdescriptors were only available by their own digests, so a
25667 controller would have to ask for and parse the whole microdescriptor
25668 consensus in order to look up a single relay's microdesc. Fixes
25669 bug 3832; bugfix on 0.2.3.1-alpha.
25670 - Use OpenSSL's EVP interface for AES encryption, so that all AES
25671 operations can use hardware acceleration (if present). Resolves
25674 o Minor bugfixes (on 0.2.2.x and earlier):
25675 - Detect failure to initialize Libevent. This fix provides better
25676 detection for future instances of bug 4457.
25677 - Avoid frequent calls to the fairly expensive cull_wedged_cpuworkers
25678 function. This was eating up hideously large amounts of time on some
25679 busy servers. Fixes bug 4518; bugfix on 0.0.9.8.
25680 - Don't warn about unused log_mutex in log.c when building with
25681 --disable-threads using a recent GCC. Fixes bug 4437; bugfix on
25682 0.1.0.6-rc which introduced --disable-threads.
25683 - Allow manual 'authenticate' commands to the controller interface
25684 from netcat (nc) as well as telnet. We were rejecting them because
25685 they didn't come with the expected whitespace at the end of the
25686 command. Bugfix on 0.1.1.1-alpha; fixes bug 2893.
25687 - Fix some (not actually triggerable) buffer size checks in usage of
25688 tor_inet_ntop. Fixes bug 4434; bugfix on Tor 0.2.0.1-alpha. Patch
25690 - Fix parsing of some corner-cases with tor_inet_pton(). Fixes
25691 bug 4515; bugfix on 0.2.0.1-alpha; fix by Anders Sundman.
25692 - When configuring, starting, or stopping an NT service, stop
25693 immediately after the service configuration attempt has succeeded
25694 or failed. Fixes bug 3963; bugfix on 0.2.0.7-alpha.
25695 - When sending a NETINFO cell, include the original address
25696 received for the other side, not its canonical address. Found
25697 by "troll_un"; fixes bug 4349; bugfix on 0.2.0.10-alpha.
25698 - Rename the bench_{aes,dmap} functions to test_*, so that tinytest
25699 can pick them up when the tests aren't disabled. Bugfix on
25700 0.2.2.4-alpha which introduced tinytest.
25701 - Fix a memory leak when we check whether a hidden service
25702 descriptor has any usable introduction points left. Fixes bug
25703 4424. Bugfix on 0.2.2.25-alpha.
25704 - Fix a memory leak in launch_direct_bridge_descriptor_fetch() that
25705 occurred when a client tried to fetch a descriptor for a bridge
25706 in ExcludeNodes. Fixes bug 4383; bugfix on 0.2.2.25-alpha.
25708 o Minor bugfixes (on 0.2.3.x):
25709 - Make util unit tests build correctly with MSVC. Bugfix on
25710 0.2.3.3-alpha. Patch by Gisle Vanem.
25711 - Successfully detect AUTH_CHALLENGE cells with no recognized
25712 authentication type listed. Fixes bug 4367; bugfix on 0.2.3.6-alpha.
25713 Found by frosty_un.
25714 - If a relay receives an AUTH_CHALLENGE cell it can't answer,
25715 it should still send a NETINFO cell to allow the connection to
25716 become open. Fixes bug 4368; fix on 0.2.3.6-alpha; bug found by
25718 - Log less loudly when we get an invalid authentication certificate
25719 from a source other than a directory authority: it's not unusual
25720 to see invalid certs because of clock skew. Fixes bug 4370; bugfix
25722 - Tolerate servers with more clock skew in their authentication
25723 certificates than previously. Fixes bug 4371; bugfix on
25725 - Fix a couple of compile warnings on Windows. Fixes bug 4469; bugfix
25726 on 0.2.3.4-alpha and 0.2.3.6-alpha.
25729 - Add two new config options for directory authorities:
25730 AuthDirFastGuarantee sets a bandwidth threshold for guaranteeing the
25731 Fast flag, and AuthDirGuardBWGuarantee sets a bandwidth threshold
25732 that is always sufficient to satisfy the bandwidth requirement for
25733 the Guard flag. Now it will be easier for researchers to simulate
25734 Tor networks with different values. Resolves ticket 4484.
25735 - When Tor ignores a hidden service specified in its configuration,
25736 include the hidden service's directory in the warning message.
25737 Previously, we would only tell the user that some hidden service
25738 was ignored. Bugfix on 0.0.6; fixes bug 4426.
25739 - When we fail to initialize Libevent, retry with IOCP disabled so we
25740 don't need to turn on multi-threading support in Libevent, which in
25741 turn requires a working socketpair(). This is a workaround for bug
25742 4457, which affects Libevent versions from 2.0.1-alpha through
25744 - Detect when we try to build on a platform that doesn't define
25745 AF_UNSPEC to 0. We don't work there, so refuse to compile.
25746 - Update to the November 1 2011 Maxmind GeoLite Country database.
25748 o Packaging changes:
25749 - Make it easier to automate expert package builds on Windows,
25750 by removing an absolute path from makensis.exe command.
25752 o Code simplifications and refactoring:
25753 - Remove some redundant #include directives throughout the code.
25754 Patch from Andrea Gelmini.
25755 - Unconditionally use OpenSSL's AES implementation instead of our
25756 old built-in one. OpenSSL's AES has been better for a while, and
25757 relatively few servers should still be on any version of OpenSSL
25758 that doesn't have good optimized assembly AES.
25759 - Use the name "CERTS" consistently to refer to the new cell type;
25760 we were calling it CERT in some places and CERTS in others.
25763 - Numerous new unit tests for functions in util.c and address.c by
25765 - The long-disabled benchmark tests are now split into their own
25766 ./src/test/bench binary.
25767 - The benchmark tests can now use more accurate timers than
25768 gettimeofday() when such timers are available.
25771 Changes in version 0.2.3.7-alpha - 2011-10-30
25772 Tor 0.2.3.7-alpha fixes a crash bug in 0.2.3.6-alpha introduced by
25773 the new v3 handshake. It also resolves yet another bridge address
25777 - If we mark an OR connection for close based on a cell we process,
25778 don't process any further cells on it. We already avoid further
25779 reads on marked-for-close connections, but now we also discard the
25780 cells we'd already read. Fixes bug 4299; bugfix on 0.2.0.10-alpha,
25781 which was the first version where we might mark a connection for
25782 close based on processing a cell on it.
25783 - Fix a double-free bug that would occur when we received an invalid
25784 certificate in a CERT cell in the new v3 handshake. Fixes bug 4343;
25785 bugfix on 0.2.3.6-alpha.
25786 - Bridges no longer include their address in NETINFO cells on outgoing
25787 OR connections, to allow them to blend in better with clients.
25788 Removes another avenue for enumerating bridges. Reported by
25789 "troll_un". Fixes bug 4348; bugfix on 0.2.0.10-alpha, when NETINFO
25790 cells were introduced.
25793 - Fixed a typo in a hibernation-related log message. Fixes bug 4331;
25794 bugfix on 0.2.2.23-alpha; found by "tmpname0901".
25797 Changes in version 0.2.3.6-alpha - 2011-10-26
25798 Tor 0.2.3.6-alpha includes the fix from 0.2.2.34 for a critical
25799 anonymity vulnerability where an attacker can deanonymize Tor
25800 users. Everybody should upgrade.
25802 This release also features support for a new v3 connection handshake
25803 protocol, and fixes to make hidden service connections more robust.
25806 - Implement a new handshake protocol (v3) for authenticating Tors to
25807 each other over TLS. It should be more resistant to fingerprinting
25808 than previous protocols, and should require less TLS hacking for
25809 future Tor implementations. Implements proposal 176.
25810 - Allow variable-length padding cells to disguise the length of
25811 Tor's TLS records. Implements part of proposal 184.
25813 o Privacy/anonymity fixes (clients):
25814 - Clients and bridges no longer send TLS certificate chains on
25815 outgoing OR connections. Previously, each client or bridge would
25816 use the same cert chain for all outgoing OR connections until
25817 its IP address changes, which allowed any relay that the client
25818 or bridge contacted to determine which entry guards it is using.
25819 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
25820 - If a relay receives a CREATE_FAST cell on a TLS connection, it
25821 no longer considers that connection as suitable for satisfying a
25822 circuit EXTEND request. Now relays can protect clients from the
25823 CVE-2011-2768 issue even if the clients haven't upgraded yet.
25824 - Directory authorities no longer assign the Guard flag to relays
25825 that haven't upgraded to the above "refuse EXTEND requests
25826 to client connections" fix. Now directory authorities can
25827 protect clients from the CVE-2011-2768 issue even if neither
25828 the clients nor the relays have upgraded yet. There's a new
25829 "GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays" config option
25830 to let us transition smoothly, else tomorrow there would be no
25833 o Major bugfixes (hidden services):
25834 - Improve hidden service robustness: when an attempt to connect to
25835 a hidden service ends, be willing to refetch its hidden service
25836 descriptors from each of the HSDir relays responsible for them
25837 immediately. Previously, we would not consider refetching the
25838 service's descriptors from each HSDir for 15 minutes after the last
25839 fetch, which was inconvenient if the hidden service was not running
25840 during the first attempt. Bugfix on 0.2.0.18-alpha; fixes bug 3335.
25841 - When one of a hidden service's introduction points appears to be
25842 unreachable, stop trying it. Previously, we would keep trying
25843 to build circuits to the introduction point until we lost the
25844 descriptor, usually because the user gave up and restarted Tor.
25845 Partly fixes bug 3825.
25846 - Don't launch a useless circuit after failing to use one of a
25847 hidden service's introduction points. Previously, we would
25848 launch a new introduction circuit, but not set the hidden service
25849 which that circuit was intended to connect to, so it would never
25850 actually be used. A different piece of code would then create a
25851 new introduction circuit correctly. Bug reported by katmagic and
25852 found by Sebastian Hahn. Bugfix on 0.2.1.13-alpha; fixes bug 4212.
25854 o Major bugfixes (other):
25855 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
25856 that they initiated. Relays could distinguish incoming bridge
25857 connections from client connections, creating another avenue for
25858 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
25859 Found by "frosty_un".
25860 - Don't update the AccountingSoftLimitHitAt state file entry whenever
25861 tor gets started. This prevents a wrong average bandwidth
25862 estimate, which would cause relays to always start a new accounting
25863 interval at the earliest possible moment. Fixes bug 2003; bugfix
25864 on 0.2.2.7-alpha. Reported by BryonEldridge, who also helped
25865 immensely in tracking this bug down.
25866 - Fix a crash bug when changing node restrictions while a DNS lookup
25867 is in-progress. Fixes bug 4259; bugfix on 0.2.2.25-alpha. Bugfix
25870 o Minor bugfixes (on 0.2.2.x and earlier):
25871 - When a hidden service turns an extra service-side introduction
25872 circuit into a general-purpose circuit, free the rend_data and
25873 intro_key fields first, so we won't leak memory if the circuit
25874 is cannibalized for use as another service-side introduction
25875 circuit. Bugfix on 0.2.1.7-alpha; fixes bug 4251.
25876 - Rephrase the log message emitted if the TestSocks check is
25877 successful. Patch from Fabian Keil; fixes bug 4094.
25878 - Bridges now skip DNS self-tests, to act a little more stealthily.
25879 Fixes bug 4201; bugfix on 0.2.0.3-alpha, which first introduced
25880 bridges. Patch by "warms0x".
25881 - Remove a confusing dollar sign from the example fingerprint in the
25882 man page, and also make the example fingerprint a valid one. Fixes
25883 bug 4309; bugfix on 0.2.1.3-alpha.
25884 - Fix internal bug-checking logic that was supposed to catch
25885 failures in digest generation so that it will fail more robustly
25886 if we ask for a nonexistent algorithm. Found by Coverity Scan.
25887 Bugfix on 0.2.2.1-alpha; fixes Coverity CID 479.
25888 - Report any failure in init_keys() calls launched because our
25889 IP address has changed. Spotted by Coverity Scan. Bugfix on
25890 0.1.1.4-alpha; fixes CID 484.
25892 o Minor bugfixes (on 0.2.3.x):
25893 - Fix a bug in configure.in that kept it from building a configure
25894 script with autoconf versions earlier than 2.61. Fixes bug 2430;
25895 bugfix on 0.2.3.1-alpha.
25896 - Don't warn users that they are exposing a client port to the
25897 Internet if they have specified an RFC1918 address. Previously,
25898 we would warn if the user had specified any non-loopback
25899 address. Bugfix on 0.2.3.3-alpha. Fixes bug 4018; reported by Tas.
25900 - Fix memory leaks in the failing cases of the new SocksPort and
25901 ControlPort code. Found by Coverity Scan. Bugfix on 0.2.3.3-alpha;
25902 fixes coverity CIDs 485, 486, and 487.
25905 - When a hidden service's introduction point times out, consider
25906 trying it again during the next attempt to connect to the
25907 HS. Previously, we would not try it again unless a newly fetched
25908 descriptor contained it. Required by fixes for bugs 1297 and 3825.
25909 - The next version of Windows will be called Windows 8, and it has
25910 a major version of 6, minor version of 2. Correctly identify that
25911 version instead of calling it "Very recent version". Resolves
25912 ticket 4153; reported by funkstar.
25913 - The Bridge Authority now writes statistics on how many bridge
25914 descriptors it gave out in total, and how many unique descriptors
25915 it gave out. It also lists how often the most and least commonly
25916 fetched descriptors were given out, as well as the median and
25917 25th/75th percentile. Implements tickets 4200 and 4294.
25918 - Update to the October 4 2011 Maxmind GeoLite Country database.
25920 o Code simplifications and refactoring:
25921 - Remove some old code to remember statistics about which descriptors
25922 we've served as a directory mirror. The feature wasn't used and
25923 is outdated now that microdescriptors are around.
25924 - Rename Tor functions that turn strings into addresses, so that
25925 "parse" indicates that no hostname resolution occurs, and
25926 "lookup" indicates that hostname resolution may occur. This
25927 should help prevent mistakes in the future. Fixes bug 3512.
25930 Changes in version 0.2.2.34 - 2011-10-26
25931 Tor 0.2.2.34 fixes a critical anonymity vulnerability where an attacker
25932 can deanonymize Tor users. Everybody should upgrade.
25934 The attack relies on four components: 1) Clients reuse their TLS cert
25935 when talking to different relays, so relays can recognize a user by
25936 the identity key in her cert. 2) An attacker who knows the client's
25937 identity key can probe each guard relay to see if that identity key
25938 is connected to that guard relay right now. 3) A variety of active
25939 attacks in the literature (starting from "Low-Cost Traffic Analysis
25940 of Tor" by Murdoch and Danezis in 2005) allow a malicious website to
25941 discover the guard relays that a Tor user visiting the website is using.
25942 4) Clients typically pick three guards at random, so the set of guards
25943 for a given user could well be a unique fingerprint for her. This
25944 release fixes components #1 and #2, which is enough to block the attack;
25945 the other two remain as open research problems. Special thanks to
25946 "frosty_un" for reporting the issue to us!
25948 Clients should upgrade so they are no longer recognizable by the TLS
25949 certs they present. Relays should upgrade so they no longer allow a
25950 remote attacker to probe them to test whether unpatched clients are
25951 currently connected to them.
25953 This release also fixes several vulnerabilities that allow an attacker
25954 to enumerate bridge relays. Some bridge enumeration attacks still
25955 remain; see for example proposal 188.
25957 o Privacy/anonymity fixes (clients):
25958 - Clients and bridges no longer send TLS certificate chains on
25959 outgoing OR connections. Previously, each client or bridge would
25960 use the same cert chain for all outgoing OR connections until
25961 its IP address changes, which allowed any relay that the client
25962 or bridge contacted to determine which entry guards it is using.
25963 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
25964 - If a relay receives a CREATE_FAST cell on a TLS connection, it
25965 no longer considers that connection as suitable for satisfying a
25966 circuit EXTEND request. Now relays can protect clients from the
25967 CVE-2011-2768 issue even if the clients haven't upgraded yet.
25968 - Directory authorities no longer assign the Guard flag to relays
25969 that haven't upgraded to the above "refuse EXTEND requests
25970 to client connections" fix. Now directory authorities can
25971 protect clients from the CVE-2011-2768 issue even if neither
25972 the clients nor the relays have upgraded yet. There's a new
25973 "GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays" config option
25974 to let us transition smoothly, else tomorrow there would be no
25977 o Privacy/anonymity fixes (bridge enumeration):
25978 - Bridge relays now do their directory fetches inside Tor TLS
25979 connections, like all the other clients do, rather than connecting
25980 directly to the DirPort like public relays do. Removes another
25981 avenue for enumerating bridges. Fixes bug 4115; bugfix on 0.2.0.35.
25982 - Bridges relays now build circuits for themselves in a more similar
25983 way to how clients build them. Removes another avenue for
25984 enumerating bridges. Fixes bug 4124; bugfix on 0.2.0.3-alpha,
25985 when bridges were introduced.
25986 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
25987 that they initiated. Relays could distinguish incoming bridge
25988 connections from client connections, creating another avenue for
25989 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
25990 Found by "frosty_un".
25993 - Fix a crash bug when changing node restrictions while a DNS lookup
25994 is in-progress. Fixes bug 4259; bugfix on 0.2.2.25-alpha. Bugfix
25996 - Don't launch a useless circuit after failing to use one of a
25997 hidden service's introduction points. Previously, we would
25998 launch a new introduction circuit, but not set the hidden service
25999 which that circuit was intended to connect to, so it would never
26000 actually be used. A different piece of code would then create a
26001 new introduction circuit correctly. Bug reported by katmagic and
26002 found by Sebastian Hahn. Bugfix on 0.2.1.13-alpha; fixes bug 4212.
26005 - Change an integer overflow check in the OpenBSD_Malloc code so
26006 that GCC is less likely to eliminate it as impossible. Patch
26007 from Mansour Moufid. Fixes bug 4059.
26008 - When a hidden service turns an extra service-side introduction
26009 circuit into a general-purpose circuit, free the rend_data and
26010 intro_key fields first, so we won't leak memory if the circuit
26011 is cannibalized for use as another service-side introduction
26012 circuit. Bugfix on 0.2.1.7-alpha; fixes bug 4251.
26013 - Bridges now skip DNS self-tests, to act a little more stealthily.
26014 Fixes bug 4201; bugfix on 0.2.0.3-alpha, which first introduced
26015 bridges. Patch by "warms0x".
26016 - Fix internal bug-checking logic that was supposed to catch
26017 failures in digest generation so that it will fail more robustly
26018 if we ask for a nonexistent algorithm. Found by Coverity Scan.
26019 Bugfix on 0.2.2.1-alpha; fixes Coverity CID 479.
26020 - Report any failure in init_keys() calls launched because our
26021 IP address has changed. Spotted by Coverity Scan. Bugfix on
26022 0.1.1.4-alpha; fixes CID 484.
26024 o Minor bugfixes (log messages and documentation):
26025 - Remove a confusing dollar sign from the example fingerprint in the
26026 man page, and also make the example fingerprint a valid one. Fixes
26027 bug 4309; bugfix on 0.2.1.3-alpha.
26028 - The next version of Windows will be called Windows 8, and it has
26029 a major version of 6, minor version of 2. Correctly identify that
26030 version instead of calling it "Very recent version". Resolves
26031 ticket 4153; reported by funkstar.
26032 - Downgrade log messages about circuit timeout calibration from
26033 "notice" to "info": they don't require or suggest any human
26034 intervention. Patch from Tom Lowenthal. Fixes bug 4063;
26035 bugfix on 0.2.2.14-alpha.
26038 - Turn on directory request statistics by default and include them in
26039 extra-info descriptors. Don't break if we have no GeoIP database.
26040 Backported from 0.2.3.1-alpha; implements ticket 3951.
26041 - Update to the October 4 2011 Maxmind GeoLite Country database.
26044 Changes in version 0.2.1.31 - 2011-10-26
26045 Tor 0.2.1.31 backports important security and privacy fixes for
26046 oldstable. This release is intended only for package maintainers and
26047 others who cannot use the 0.2.2 stable series. All others should be
26048 using Tor 0.2.2.x or newer.
26050 o Security fixes (also included in 0.2.2.x):
26051 - Replace all potentially sensitive memory comparison operations
26052 with versions whose runtime does not depend on the data being
26053 compared. This will help resist a class of attacks where an
26054 adversary can use variations in timing information to learn
26055 sensitive data. Fix for one case of bug 3122. (Safe memcmp
26056 implementation by Robert Ransom based partially on code by DJB.)
26057 - Fix an assert in parsing router descriptors containing IPv6
26058 addresses. This one took down the directory authorities when
26059 somebody tried some experimental code. Bugfix on 0.2.1.3-alpha.
26061 o Privacy/anonymity fixes (also included in 0.2.2.x):
26062 - Clients and bridges no longer send TLS certificate chains on
26063 outgoing OR connections. Previously, each client or bridge would
26064 use the same cert chain for all outgoing OR connections until
26065 its IP address changes, which allowed any relay that the client
26066 or bridge contacted to determine which entry guards it is using.
26067 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
26068 - If a relay receives a CREATE_FAST cell on a TLS connection, it
26069 no longer considers that connection as suitable for satisfying a
26070 circuit EXTEND request. Now relays can protect clients from the
26071 CVE-2011-2768 issue even if the clients haven't upgraded yet.
26072 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
26073 that they initiated. Relays could distinguish incoming bridge
26074 connections from client connections, creating another avenue for
26075 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
26076 Found by "frosty_un".
26077 - When receiving a hidden service descriptor, check that it is for
26078 the hidden service we wanted. Previously, Tor would store any
26079 hidden service descriptors that a directory gave it, whether it
26080 wanted them or not. This wouldn't have let an attacker impersonate
26081 a hidden service, but it did let directories pre-seed a client
26082 with descriptors that it didn't want. Bugfix on 0.0.6.
26083 - Avoid linkability based on cached hidden service descriptors: forget
26084 all hidden service descriptors cached as a client when processing a
26085 SIGNAL NEWNYM command. Fixes bug 3000; bugfix on 0.0.6.
26086 - Make the bridge directory authority refuse to answer directory
26087 requests for "all" descriptors. It used to include bridge
26088 descriptors in its answer, which was a major information leak.
26089 Found by "piebeer". Bugfix on 0.2.0.3-alpha.
26090 - Don't attach new streams to old rendezvous circuits after SIGNAL
26091 NEWNYM. Previously, we would keep using an existing rendezvous
26092 circuit if it remained open (i.e. if it were kept open by a
26093 long-lived stream, or if a new stream were attached to it before
26094 Tor could notice that it was old and no longer in use). Bugfix on
26095 0.1.1.15-rc; fixes bug 3375.
26097 o Minor bugfixes (also included in 0.2.2.x):
26098 - When we restart our relay, we might get a successful connection
26099 from the outside before we've started our reachability tests,
26100 triggering a warning: "ORPort found reachable, but I have no
26101 routerinfo yet. Failing to inform controller of success." This
26102 bug was harmless unless Tor is running under a controller
26103 like Vidalia, in which case the controller would never get a
26104 REACHABILITY_SUCCEEDED status event. Bugfix on 0.1.2.6-alpha;
26106 - Build correctly on OSX with zlib 1.2.4 and higher with all warnings
26107 enabled. Fixes bug 1526.
26108 - Remove undocumented option "-F" from tor-resolve: it hasn't done
26109 anything since 0.2.1.16-rc.
26110 - Avoid signed/unsigned comparisons by making SIZE_T_CEILING unsigned.
26111 None of the cases where we did this before were wrong, but by making
26112 this change we avoid warnings. Fixes bug 2475; bugfix on 0.2.1.28.
26113 - Fix a rare crash bug that could occur when a client was configured
26114 with a large number of bridges. Fixes bug 2629; bugfix on
26115 0.2.1.2-alpha. Bugfix by trac user "shitlei".
26116 - Correct the warning displayed when a rendezvous descriptor exceeds
26117 the maximum size. Fixes bug 2750; bugfix on 0.2.1.5-alpha. Found by
26119 - Fix an uncommon assertion failure when running with DNSPort under
26120 heavy load. Fixes bug 2933; bugfix on 0.2.0.1-alpha.
26121 - When warning about missing zlib development packages during compile,
26122 give the correct package names. Bugfix on 0.2.0.1-alpha.
26123 - Require that introduction point keys and onion keys have public
26124 exponent 65537. Bugfix on 0.2.0.10-alpha.
26125 - Do not crash when our configuration file becomes unreadable, for
26126 example due to a permissions change, between when we start up
26127 and when a controller calls SAVECONF. Fixes bug 3135; bugfix
26129 - Fix warnings from GCC 4.6's "-Wunused-but-set-variable" option.
26131 - Always NUL-terminate the sun_path field of a sockaddr_un before
26132 passing it to the kernel. (Not a security issue: kernels are
26133 smart enough to reject bad sockaddr_uns.) Found by Coverity;
26134 CID #428. Bugfix on Tor 0.2.0.3-alpha.
26135 - Don't stack-allocate the list of supplementary GIDs when we're
26136 about to log them. Stack-allocating NGROUPS_MAX gid_t elements
26137 could take up to 256K, which is way too much stack. Found by
26138 Coverity; CID #450. Bugfix on 0.2.1.7-alpha.
26140 o Minor bugfixes (only in 0.2.1.x):
26141 - Resume using micro-version numbers in 0.2.1.x: our Debian packages
26142 rely on them. Bugfix on 0.2.1.30.
26143 - Use git revisions instead of svn revisions when generating our
26144 micro-version numbers. Bugfix on 0.2.1.15-rc; fixes bug 2402.
26146 o Minor features (also included in 0.2.2.x):
26147 - Adjust the expiration time on our SSL session certificates to
26148 better match SSL certs seen in the wild. Resolves ticket 4014.
26149 - Allow nameservers with IPv6 address. Resolves bug 2574.
26150 - Update to the October 4 2011 Maxmind GeoLite Country database.
26153 Changes in version 0.2.3.5-alpha - 2011-09-28
26154 Tor 0.2.3.5-alpha fixes two bugs that make it possible to enumerate
26155 bridge relays; fixes an assertion error that many users started hitting
26156 today; and adds the ability to refill token buckets more often than
26157 once per second, allowing significant performance improvements.
26160 - Bridge relays now do their directory fetches inside Tor TLS
26161 connections, like all the other clients do, rather than connecting
26162 directly to the DirPort like public relays do. Removes another
26163 avenue for enumerating bridges. Fixes bug 4115; bugfix on 0.2.0.35.
26164 - Bridges relays now build circuits for themselves in a more similar
26165 way to how clients build them. Removes another avenue for
26166 enumerating bridges. Fixes bug 4124; bugfix on 0.2.0.3-alpha,
26167 when bridges were introduced.
26170 - Fix an "Assertion md->held_by_node == 1 failed" error that could
26171 occur when the same microdescriptor was referenced by two node_t
26172 objects at once. Fix for bug 4118; bugfix on Tor 0.2.3.1-alpha.
26174 o Major features (networking):
26175 - Add a new TokenBucketRefillInterval option to refill token buckets
26176 more frequently than once per second. This should improve network
26177 performance, alleviate queueing problems, and make traffic less
26178 bursty. Implements proposal 183; closes ticket 3630. Design by
26179 Florian Tschorsch and Björn Scheuermann; implementation by
26183 - Change an integer overflow check in the OpenBSD_Malloc code so
26184 that GCC is less likely to eliminate it as impossible. Patch
26185 from Mansour Moufid. Fixes bug 4059.
26187 o Minor bugfixes (usability):
26188 - Downgrade log messages about circuit timeout calibration from
26189 "notice" to "info": they don't require or suggest any human
26190 intervention. Patch from Tom Lowenthal. Fixes bug 4063;
26191 bugfix on 0.2.2.14-alpha.
26193 o Minor features (diagnostics):
26194 - When the system call to create a listener socket fails, log the
26195 error message explaining why. This may help diagnose bug 4027.
26198 Changes in version 0.2.3.4-alpha - 2011-09-13
26199 Tor 0.2.3.4-alpha includes the fixes from 0.2.2.33, including a slight
26200 tweak to Tor's TLS handshake that makes relays and bridges that run
26201 this new version reachable from Iran again. It also fixes a few new
26202 bugs in 0.2.3.x, and teaches relays to recognize when they're not
26203 listed in the network consensus and republish.
26205 o Major bugfixes (also part of 0.2.2.33):
26206 - Avoid an assertion failure when reloading a configuration with
26207 TrackExitHosts changes. Found and fixed by 'laruldan'. Fixes bug
26208 3923; bugfix on 0.2.2.25-alpha.
26210 o Minor features (security, also part of 0.2.2.33):
26211 - Check for replays of the public-key encrypted portion of an
26212 INTRODUCE1 cell, in addition to the current check for replays of
26213 the g^x value. This prevents a possible class of active attacks
26214 by an attacker who controls both an introduction point and a
26215 rendezvous point, and who uses the malleability of AES-CTR to
26216 alter the encrypted g^x portion of the INTRODUCE1 cell. We think
26217 that these attacks are infeasible (requiring the attacker to send
26218 on the order of zettabytes of altered cells in a short interval),
26219 but we'd rather block them off in case there are any classes of
26220 this attack that we missed. Reported by Willem Pinckaers.
26222 o Minor features (also part of 0.2.2.33):
26223 - Adjust the expiration time on our SSL session certificates to
26224 better match SSL certs seen in the wild. Resolves ticket 4014.
26225 - Change the default required uptime for a relay to be accepted as
26226 a HSDir (hidden service directory) from 24 hours to 25 hours.
26227 Improves on 0.2.0.10-alpha; resolves ticket 2649.
26228 - Add a VoteOnHidServDirectoriesV2 config option to allow directory
26229 authorities to abstain from voting on assignment of the HSDir
26230 consensus flag. Related to bug 2649.
26231 - Update to the September 6 2011 Maxmind GeoLite Country database.
26233 o Minor bugfixes (also part of 0.2.2.33):
26234 - Demote the 'replay detected' log message emitted when a hidden
26235 service receives the same Diffie-Hellman public key in two different
26236 INTRODUCE2 cells to info level. A normal Tor client can cause that
26237 log message during its normal operation. Bugfix on 0.2.1.6-alpha;
26238 fixes part of bug 2442.
26239 - Demote the 'INTRODUCE2 cell is too {old,new}' log message to info
26240 level. There is nothing that a hidden service's operator can do
26241 to fix its clients' clocks. Bugfix on 0.2.1.6-alpha; fixes part
26243 - Clarify a log message specifying the characters permitted in
26244 HiddenServiceAuthorizeClient client names. Previously, the log
26245 message said that "[A-Za-z0-9+-_]" were permitted; that could have
26246 given the impression that every ASCII character between "+" and "_"
26247 was permitted. Now we say "[A-Za-z0-9+_-]". Bugfix on 0.2.1.5-alpha.
26249 o Build fixes (also part of 0.2.2.33):
26250 - Clean up some code issues that prevented Tor from building on older
26251 BSDs. Fixes bug 3894; reported by "grarpamp".
26252 - Search for a platform-specific version of "ar" when cross-compiling.
26253 Should fix builds on iOS. Resolves bug 3909, found by Marco Bonetti.
26256 - Fix a bug where the SocksPort option (for example) would get
26257 ignored and replaced by the default if a SocksListenAddress
26258 option was set. Bugfix on 0.2.3.3-alpha; fixes bug 3936. Fix by
26262 - Relays now try regenerating and uploading their descriptor more
26263 frequently if they are not listed in the consensus, or if the
26264 version of their descriptor listed in the consensus is too
26265 old. This fix should prevent situations where a server declines
26266 to re-publish itself because it has done so too recently, even
26267 though the authorities decided not to list its recent-enough
26268 descriptor. Fix for bug 3327.
26271 - Relays now include a reason for regenerating their descriptors
26272 in an HTTP header when uploading to the authorities. This will
26273 make it easier to debug descriptor-upload issues in the future.
26274 - When starting as root and then changing our UID via the User
26275 control option, and we have a ControlSocket configured, make sure
26276 that the ControlSocket is owned by the same account that Tor will
26277 run under. Implements ticket 3421; fix by Jérémy Bobbio.
26280 - Abort if tor_vasprintf fails in connection_printf_to_buf (a
26281 utility function used in the control-port code). This shouldn't
26282 ever happen unless Tor is completely out of memory, but if it did
26283 happen and Tor somehow recovered from it, Tor could have sent a log
26284 message to a control port in the middle of a reply to a controller
26285 command. Fixes part of bug 3428; bugfix on 0.1.2.3-alpha.
26286 - Make 'FetchUselessDescriptors' cause all descriptor types and
26287 all consensus types (including microdescriptors) to get fetched.
26288 Fixes bug 3851; bugfix on 0.2.3.1-alpha.
26290 o Code refactoring:
26291 - Make a new "entry connection" struct as an internal subtype of "edge
26292 connection", to simplify the code and make exit connections smaller.
26295 Changes in version 0.2.2.33 - 2011-09-13
26296 Tor 0.2.2.33 fixes several bugs, and includes a slight tweak to Tor's
26297 TLS handshake that makes relays and bridges that run this new version
26298 reachable from Iran again.
26301 - Avoid an assertion failure when reloading a configuration with
26302 TrackExitHosts changes. Found and fixed by 'laruldan'. Fixes bug
26303 3923; bugfix on 0.2.2.25-alpha.
26305 o Minor features (security):
26306 - Check for replays of the public-key encrypted portion of an
26307 INTRODUCE1 cell, in addition to the current check for replays of
26308 the g^x value. This prevents a possible class of active attacks
26309 by an attacker who controls both an introduction point and a
26310 rendezvous point, and who uses the malleability of AES-CTR to
26311 alter the encrypted g^x portion of the INTRODUCE1 cell. We think
26312 that these attacks are infeasible (requiring the attacker to send
26313 on the order of zettabytes of altered cells in a short interval),
26314 but we'd rather block them off in case there are any classes of
26315 this attack that we missed. Reported by Willem Pinckaers.
26318 - Adjust the expiration time on our SSL session certificates to
26319 better match SSL certs seen in the wild. Resolves ticket 4014.
26320 - Change the default required uptime for a relay to be accepted as
26321 a HSDir (hidden service directory) from 24 hours to 25 hours.
26322 Improves on 0.2.0.10-alpha; resolves ticket 2649.
26323 - Add a VoteOnHidServDirectoriesV2 config option to allow directory
26324 authorities to abstain from voting on assignment of the HSDir
26325 consensus flag. Related to bug 2649.
26326 - Update to the September 6 2011 Maxmind GeoLite Country database.
26328 o Minor bugfixes (documentation and log messages):
26329 - Correct the man page to explain that HashedControlPassword and
26330 CookieAuthentication can both be set, in which case either method
26331 is sufficient to authenticate to Tor. Bugfix on 0.2.0.7-alpha,
26332 when we decided to allow these config options to both be set. Issue
26333 raised by bug 3898.
26334 - Demote the 'replay detected' log message emitted when a hidden
26335 service receives the same Diffie-Hellman public key in two different
26336 INTRODUCE2 cells to info level. A normal Tor client can cause that
26337 log message during its normal operation. Bugfix on 0.2.1.6-alpha;
26338 fixes part of bug 2442.
26339 - Demote the 'INTRODUCE2 cell is too {old,new}' log message to info
26340 level. There is nothing that a hidden service's operator can do
26341 to fix its clients' clocks. Bugfix on 0.2.1.6-alpha; fixes part
26343 - Clarify a log message specifying the characters permitted in
26344 HiddenServiceAuthorizeClient client names. Previously, the log
26345 message said that "[A-Za-z0-9+-_]" were permitted; that could have
26346 given the impression that every ASCII character between "+" and "_"
26347 was permitted. Now we say "[A-Za-z0-9+_-]". Bugfix on 0.2.1.5-alpha.
26350 - Provide a substitute implementation of lround() for MSVC, which
26351 apparently lacks it. Patch from Gisle Vanem.
26352 - Clean up some code issues that prevented Tor from building on older
26353 BSDs. Fixes bug 3894; reported by "grarpamp".
26354 - Search for a platform-specific version of "ar" when cross-compiling.
26355 Should fix builds on iOS. Resolves bug 3909, found by Marco Bonetti.
26358 Changes in version 0.2.3.3-alpha - 2011-09-01
26359 Tor 0.2.3.3-alpha adds a new "stream isolation" feature to improve Tor's
26360 security, and provides client-side support for the microdescriptor
26361 and optimistic data features introduced earlier in the 0.2.3.x
26362 series. It also includes numerous critical bugfixes in the (optional)
26363 bufferevent-based networking backend.
26365 o Major features (stream isolation):
26366 - You can now configure Tor so that streams from different
26367 applications are isolated on different circuits, to prevent an
26368 attacker who sees your streams as they leave an exit node from
26369 linking your sessions to one another. To do this, choose some way
26370 to distinguish the applications: have them connect to different
26371 SocksPorts, or have one of them use SOCKS4 while the other uses
26372 SOCKS5, or have them pass different authentication strings to the
26373 SOCKS proxy. Then, use the new SocksPort syntax to configure the
26374 degree of isolation you need. This implements Proposal 171.
26375 - There's a new syntax for specifying multiple client ports (such as
26376 SOCKSPort, TransPort, DNSPort, NATDPort): you can now just declare
26377 multiple *Port entries with full addr:port syntax on each.
26378 The old *ListenAddress format is still supported, but you can't
26379 mix it with the new *Port syntax.
26381 o Major features (other):
26382 - Enable microdescriptor fetching by default for clients. This allows
26383 clients to download a much smaller amount of directory information.
26384 To disable it (and go back to the old-style consensus and
26385 descriptors), set "UseMicrodescriptors 0" in your torrc file.
26386 - Tor's firewall-helper feature, introduced in 0.2.3.1-alpha (see the
26387 "PortForwarding" config option), now supports Windows.
26388 - When using an exit relay running 0.2.3.x, clients can now
26389 "optimistically" send data before the exit relay reports that
26390 the stream has opened. This saves a round trip when starting
26391 connections where the client speaks first (such as web browsing).
26392 This behavior is controlled by a consensus parameter (currently
26393 disabled). To turn it on or off manually, use the "OptimisticData"
26394 torrc option. Implements proposal 181; code by Ian Goldberg.
26396 o Major bugfixes (bufferevents, fixes on 0.2.3.1-alpha):
26397 - When using IOCP on Windows, we need to enable Libevent windows
26399 - The IOCP backend now works even when the user has not specified
26400 the (internal, debugging-only) _UseFilteringSSLBufferevents option.
26401 Fixes part of bug 3752.
26402 - Correctly record the bytes we've read and written when using
26403 bufferevents, so that we can include them in our bandwidth history
26404 and advertised bandwidth. Fixes bug 3803.
26405 - Apply rate-limiting only at the bottom of a chain of filtering
26406 bufferevents. This prevents us from filling up internal read
26407 buffers and violating rate-limits when filtering bufferevents
26408 are enabled. Fixes part of bug 3804.
26409 - Add high-watermarks to the output buffers for filtered
26410 bufferevents. This prevents us from filling up internal write
26411 buffers and wasting CPU cycles when filtering bufferevents are
26412 enabled. Fixes part of bug 3804.
26413 - Correctly notice when data has been written from a bufferevent
26414 without flushing it completely. Fixes bug 3805.
26415 - Fix a bug where server-side tunneled bufferevent-based directory
26416 streams would get closed prematurely. Fixes bug 3814.
26417 - Fix a use-after-free error with per-connection rate-limiting
26418 buckets. Fixes bug 3888.
26420 o Major bugfixes (also part of 0.2.2.31-rc):
26421 - If we're configured to write our ControlPorts to disk, only write
26422 them after switching UID and creating the data directory. This way,
26423 we don't fail when starting up with a nonexistent DataDirectory
26424 and a ControlPortWriteToFile setting based on that directory. Fixes
26425 bug 3747; bugfix on Tor 0.2.2.26-beta.
26428 - Added a new CONF_CHANGED event so that controllers can be notified
26429 of any configuration changes made by other controllers, or by the
26430 user. Implements ticket 1692.
26431 - Use evbuffer_copyout() in inspect_evbuffer(). This fixes a memory
26432 leak when using bufferevents, and lets Libevent worry about how to
26433 best copy data out of a buffer.
26434 - Replace files in stats/ rather than appending to them. Now that we
26435 include statistics in extra-info descriptors, it makes no sense to
26436 keep old statistics forever. Implements ticket 2930.
26438 o Minor features (build compatibility):
26439 - Limited, experimental support for building with nmake and MSVC.
26440 - Provide a substitute implementation of lround() for MSVC, which
26441 apparently lacks it. Patch from Gisle Vanem.
26443 o Minor features (also part of 0.2.2.31-rc):
26444 - Update to the August 2 2011 Maxmind GeoLite Country database.
26446 o Minor bugfixes (on 0.2.3.x-alpha):
26447 - Fix a spurious warning when parsing SOCKS requests with
26448 bufferevents enabled. Fixes bug 3615; bugfix on 0.2.3.2-alpha.
26449 - Get rid of a harmless warning that could happen on relays running
26450 with bufferevents. The warning was caused by someone doing an http
26451 request to a relay's orport. Also don't warn for a few related
26452 non-errors. Fixes bug 3700; bugfix on 0.2.3.1-alpha.
26454 o Minor bugfixes (on 2.2.x and earlier):
26455 - Correct the man page to explain that HashedControlPassword and
26456 CookieAuthentication can both be set, in which case either method
26457 is sufficient to authenticate to Tor. Bugfix on 0.2.0.7-alpha,
26458 when we decided to allow these config options to both be set. Issue
26459 raised by bug 3898.
26460 - The "--quiet" and "--hush" options now apply not only to Tor's
26461 behavior before logs are configured, but also to Tor's behavior in
26462 the absence of configured logs. Fixes bug 3550; bugfix on
26465 o Minor bugfixes (also part of 0.2.2.31-rc):
26466 - Write several files in text mode, on OSes that distinguish text
26467 mode from binary mode (namely, Windows). These files are:
26468 'buffer-stats', 'dirreq-stats', and 'entry-stats' on relays
26469 that collect those statistics; 'client_keys' and 'hostname' for
26470 hidden services that use authentication; and (in the tor-gencert
26471 utility) newly generated identity and signing keys. Previously,
26472 we wouldn't specify text mode or binary mode, leading to an
26473 assertion failure. Fixes bug 3607. Bugfix on 0.2.1.1-alpha (when
26474 the DirRecordUsageByCountry option which would have triggered
26475 the assertion failure was added), although this assertion failure
26476 would have occurred in tor-gencert on Windows in 0.2.0.1-alpha.
26477 - Selectively disable deprecation warnings on OS X because Lion
26478 started deprecating the shipped copy of openssl. Fixes bug 3643.
26479 - Remove an extra pair of quotation marks around the error
26480 message in control-port STATUS_GENERAL BUG events. Bugfix on
26481 0.1.2.6-alpha; fixes bug 3732.
26482 - When unable to format an address as a string, report its value
26483 as "???" rather than reusing the last formatted address. Bugfix
26486 o Code simplifications and refactoring:
26487 - Rewrite the listener-selection logic so that parsing which ports
26488 we want to listen on is now separate from binding to the ports
26492 - Building Tor with bufferevent support now requires Libevent
26493 2.0.13-stable or later. Previous versions of Libevent had bugs in
26494 SSL-related bufferevents and related issues that would make Tor
26495 work badly with bufferevents. Requiring 2.0.13-stable also allows
26496 Tor with bufferevents to take advantage of Libevent APIs
26497 introduced after 2.0.8-rc.
26500 Changes in version 0.2.2.32 - 2011-08-27
26501 The Tor 0.2.2 release series is dedicated to the memory of Andreas
26502 Pfitzmann (1958-2010), a pioneer in anonymity and privacy research,
26503 a founder of the PETS community, a leader in our field, a mentor,
26504 and a friend. He left us with these words: "I had the possibility
26505 to contribute to this world that is not as it should be. I hope I
26506 could help in some areas to make the world a better place, and that
26507 I could also encourage other people to be engaged in improving the
26508 world. Please, stay engaged. This world needs you, your love, your
26509 initiative -- now I cannot be part of that anymore."
26511 Tor 0.2.2.32, the first stable release in the 0.2.2 branch, is finally
26512 ready. More than two years in the making, this release features improved
26513 client performance and hidden service reliability, better compatibility
26514 for Android, correct behavior for bridges that listen on more than
26515 one address, more extensible and flexible directory object handling,
26516 better reporting of network statistics, improved code security, and
26517 many many other features and bugfixes.
26520 Changes in version 0.2.2.31-rc - 2011-08-17
26521 Tor 0.2.2.31-rc is the second and hopefully final release candidate
26522 for the Tor 0.2.2.x series.
26525 - Remove an extra pair of quotation marks around the error
26526 message in control-port STATUS_GENERAL BUG events. Bugfix on
26527 0.1.2.6-alpha; fixes bug 3732.
26528 - If we're configured to write our ControlPorts to disk, only write
26529 them after switching UID and creating the data directory. This way,
26530 we don't fail when starting up with a nonexistent DataDirectory
26531 and a ControlPortWriteToFile setting based on that directory. Fixes
26532 bug 3747; bugfix on Tor 0.2.2.26-beta.
26535 - Update to the August 2 2011 Maxmind GeoLite Country database.
26538 - Allow GETINFO fingerprint to return a fingerprint even when
26539 we have not yet built a router descriptor. Fixes bug 3577;
26540 bugfix on 0.2.0.1-alpha.
26541 - Write several files in text mode, on OSes that distinguish text
26542 mode from binary mode (namely, Windows). These files are:
26543 'buffer-stats', 'dirreq-stats', and 'entry-stats' on relays
26544 that collect those statistics; 'client_keys' and 'hostname' for
26545 hidden services that use authentication; and (in the tor-gencert
26546 utility) newly generated identity and signing keys. Previously,
26547 we wouldn't specify text mode or binary mode, leading to an
26548 assertion failure. Fixes bug 3607. Bugfix on 0.2.1.1-alpha (when
26549 the DirRecordUsageByCountry option which would have triggered
26550 the assertion failure was added), although this assertion failure
26551 would have occurred in tor-gencert on Windows in 0.2.0.1-alpha.
26552 - Selectively disable deprecation warnings on OS X because Lion
26553 started deprecating the shipped copy of openssl. Fixes bug 3643.
26554 - When unable to format an address as a string, report its value
26555 as "???" rather than reusing the last formatted address. Bugfix
26559 Changes in version 0.2.3.2-alpha - 2011-07-18
26560 Tor 0.2.3.2-alpha introduces two new experimental features:
26561 microdescriptors and pluggable transports. It also continues cleaning
26562 up a variety of recently introduced features.
26565 - Clients can now use microdescriptors instead of regular descriptors
26566 to build circuits. Microdescriptors are authority-generated
26567 summaries of regular descriptors' contents, designed to change
26568 very rarely (see proposal 158 for details). This feature is
26569 designed to save bandwidth, especially for clients on slow internet
26570 connections. It's off by default for now, since nearly no caches
26571 support it, but it will be on-by-default for clients in a future
26572 version. You can use the UseMicrodescriptors option to turn it on.
26573 - Tor clients using bridges can now be configured to use a separate
26574 'transport' proxy for each bridge. This approach helps to resist
26575 censorship by allowing bridges to use protocol obfuscation
26576 plugins. It implements part of proposal 180. Implements ticket 2841.
26577 - While we're trying to bootstrap, record how many TLS connections
26578 fail in each state, and report which states saw the most failures
26579 in response to any bootstrap failures. This feature may speed up
26580 diagnosis of censorship events. Implements ticket 3116.
26582 o Major bugfixes (on 0.2.3.1-alpha):
26583 - When configuring a large set of nodes in EntryNodes (as with
26584 'EntryNodes {cc}' or 'EntryNodes 1.1.1.1/16'), choose only a
26585 random subset to be guards, and choose them in random
26586 order. Fixes bug 2798.
26587 - Tor could crash when remembering a consensus in a non-used consensus
26588 flavor without having a current consensus set. Fixes bug 3361.
26589 - Comparing an unknown address to a microdescriptor's shortened exit
26590 policy would always give a "rejected" result. Fixes bug 3599.
26591 - Using microdescriptors as a client no longer prevents Tor from
26592 uploading and downloading hidden service descriptors. Fixes
26596 - Allow nameservers with IPv6 address. Resolves bug 2574.
26597 - Accept attempts to include a password authenticator in the
26598 handshake, as supported by SOCKS5. This handles SOCKS clients that
26599 don't know how to omit a password when authenticating. Resolves
26601 - When configuring a large set of nodes in EntryNodes, and there are
26602 enough of them listed as Guard so that we don't need to consider
26603 the non-guard entries, prefer the ones listed with the Guard flag.
26604 - Check for and recover from inconsistency in the microdescriptor
26605 cache. This will make it harder for us to accidentally free a
26606 microdescriptor without removing it from the appropriate data
26607 structures. Fixes issue 3135; issue noted by "wanoskarnet".
26608 - Log SSL state transitions at log level DEBUG, log domain
26609 HANDSHAKE. This can be useful for debugging censorship events.
26610 Implements ticket 3264.
26611 - Add port 6523 (Gobby) to LongLivedPorts. Patch by intrigeri;
26612 implements ticket 3439.
26614 o Minor bugfixes (on 0.2.3.1-alpha):
26615 - Do not free all general-purpose regular descriptors just
26616 because microdescriptor use is enabled. Fixes bug 3113.
26617 - Correctly link libevent_openssl when --enable-static-libevent
26618 is passed to configure. Fixes bug 3118.
26619 - Bridges should not complain during their heartbeat log messages that
26620 they are unlisted in the consensus: that's more or less the point
26621 of being a bridge. Fixes bug 3183.
26622 - Report a SIGNAL event to controllers when acting on a delayed
26623 SIGNAL NEWNYM command. Previously, we would report a SIGNAL
26624 event to the controller if we acted on a SIGNAL NEWNYM command
26625 immediately, and otherwise not report a SIGNAL event for the
26626 command at all. Fixes bug 3349.
26627 - Fix a crash when handling the SIGNAL controller command or
26628 reporting ERR-level status events with bufferevents enabled. Found
26629 by Robert Ransom. Fixes bug 3367.
26630 - Always ship the tor-fw-helper manpage in our release tarballs.
26631 Fixes bug 3389. Reported by Stephen Walker.
26632 - Fix a class of double-mark-for-close bugs when bufferevents
26633 are enabled. Fixes bug 3403.
26634 - Update tor-fw-helper to support libnatpmp-20110618. Fixes bug 3434.
26635 - Add SIGNAL to the list returned by the 'GETINFO events/names'
26636 control-port command. Fixes part of bug 3465.
26637 - Prevent using negative indices during unit test runs when read_all()
26638 fails. Spotted by coverity.
26639 - Fix a rare memory leak when checking the nodelist without it being
26640 present. Found by coverity.
26641 - Only try to download a microdescriptor-flavored consensus from
26642 a directory cache that provides them.
26644 o Minor bugfixes (on 0.2.2.x and earlier):
26645 - Assert that hidden-service-related operations are not performed
26646 using single-hop circuits. Previously, Tor would assert that
26647 client-side streams are not attached to single-hop circuits,
26648 but not that other sensitive operations on the client and service
26649 side are not performed using single-hop circuits. Fixes bug 3332;
26651 - Don't publish a new relay descriptor when we reload our onion key,
26652 unless the onion key has actually changed. Fixes bug 3263 and
26653 resolves another cause of bug 1810. Bugfix on 0.1.1.11-alpha.
26654 - Allow GETINFO fingerprint to return a fingerprint even when
26655 we have not yet built a router descriptor. Fixes bug 3577;
26656 bugfix on 0.2.0.1-alpha.
26657 - Make 'tor --digests' list hashes of all Tor source files. Bugfix
26658 on 0.2.2.4-alpha; fixes bug 3427.
26660 o Code simplification and refactoring:
26661 - Use tor_sscanf() in place of scanf() in more places through the
26662 code. This makes us a little more locale-independent, and
26663 should help shut up code-analysis tools that can't tell
26664 a safe sscanf string from a dangerous one.
26665 - Use tt_assert(), not tor_assert(), for checking for test failures.
26666 This makes the unit tests more able to go on in the event that
26668 - Split connection_about_to_close() into separate functions for each
26672 - On Windows, we now define the _WIN32_WINNT macros only if they
26673 are not already defined. This lets the person building Tor decide,
26674 if they want, to require a later version of Windows.
26677 Changes in version 0.2.2.30-rc - 2011-07-07
26678 Tor 0.2.2.30-rc is the first release candidate for the Tor 0.2.2.x
26679 series. It fixes a few smaller bugs, but generally appears stable.
26680 Please test it and let us know whether it is!
26683 - Send a SUCCEEDED stream event to the controller when a reverse
26684 resolve succeeded. Fixes bug 3536; bugfix on 0.0.8pre1. Issue
26685 discovered by katmagic.
26686 - Always NUL-terminate the sun_path field of a sockaddr_un before
26687 passing it to the kernel. (Not a security issue: kernels are
26688 smart enough to reject bad sockaddr_uns.) Found by Coverity;
26689 CID #428. Bugfix on Tor 0.2.0.3-alpha.
26690 - Don't stack-allocate the list of supplementary GIDs when we're
26691 about to log them. Stack-allocating NGROUPS_MAX gid_t elements
26692 could take up to 256K, which is way too much stack. Found by
26693 Coverity; CID #450. Bugfix on 0.2.1.7-alpha.
26694 - Add BUILDTIMEOUT_SET to the list returned by the 'GETINFO
26695 events/names' control-port command. Bugfix on 0.2.2.9-alpha;
26696 fixes part of bug 3465.
26697 - Fix a memory leak when receiving a descriptor for a hidden
26698 service we didn't ask for. Found by Coverity; CID #30. Bugfix
26702 - Update to the July 1 2011 Maxmind GeoLite Country database.
26705 Changes in version 0.2.2.29-beta - 2011-06-20
26706 Tor 0.2.2.29-beta reverts an accidental behavior change for users who
26707 have bridge lines in their torrc but don't want to use them; gets
26708 us closer to having the control socket feature working on Debian;
26709 and fixes a variety of smaller bugs.
26712 - Revert the UseBridges option to its behavior before 0.2.2.28-beta.
26713 When we changed the default behavior to "use bridges if any
26714 are listed in the torrc", we surprised users who had bridges
26715 in their torrc files but who didn't actually want to use them.
26716 Partial resolution for bug 3354.
26719 - Don't attach new streams to old rendezvous circuits after SIGNAL
26720 NEWNYM. Previously, we would keep using an existing rendezvous
26721 circuit if it remained open (i.e. if it were kept open by a
26722 long-lived stream, or if a new stream were attached to it before
26723 Tor could notice that it was old and no longer in use). Bugfix on
26724 0.1.1.15-rc; fixes bug 3375.
26727 - Fix a bug when using ControlSocketsGroupWritable with User. The
26728 directory's group would be checked against the current group, not
26729 the configured group. Patch by Jérémy Bobbio. Fixes bug 3393;
26730 bugfix on 0.2.2.26-beta.
26731 - Make connection_printf_to_buf()'s behavior sane. Its callers
26732 expect it to emit a CRLF iff the format string ends with CRLF;
26733 it actually emitted a CRLF iff (a) the format string ended with
26734 CRLF or (b) the resulting string was over 1023 characters long or
26735 (c) the format string did not end with CRLF *and* the resulting
26736 string was 1021 characters long or longer. Bugfix on 0.1.1.9-alpha;
26737 fixes part of bug 3407.
26738 - Make send_control_event_impl()'s behavior sane. Its callers
26739 expect it to always emit a CRLF at the end of the string; it
26740 might have emitted extra control characters as well. Bugfix on
26741 0.1.1.9-alpha; fixes another part of bug 3407.
26742 - Make crypto_rand_int() check the value of its input correctly.
26743 Previously, it accepted values up to UINT_MAX, but could return a
26744 negative number if given a value above INT_MAX+1. Found by George
26745 Kadianakis. Fixes bug 3306; bugfix on 0.2.2pre14.
26746 - Avoid a segfault when reading a malformed circuit build state
26747 with more than INT_MAX entries. Found by wanoskarnet. Bugfix on
26749 - When asked about a DNS record type we don't support via a
26750 client DNSPort, reply with NOTIMPL rather than an empty
26751 reply. Patch by intrigeri. Fixes bug 3369; bugfix on 2.0.1-alpha.
26752 - Fix a rare memory leak during stats writing. Found by coverity.
26755 - Update to the June 1 2011 Maxmind GeoLite Country database.
26757 o Code simplifications and refactoring:
26758 - Remove some dead code as indicated by coverity.
26759 - Remove a few dead assignments during router parsing. Found by
26761 - Add some forgotten return value checks during unit tests. Found
26763 - Don't use 1-bit wide signed bit fields. Found by coverity.
26766 Changes in version 0.2.2.28-beta - 2011-06-04
26767 Tor 0.2.2.28-beta makes great progress towards a new stable release: we
26768 fixed a big bug in whether relays stay in the consensus consistently,
26769 we moved closer to handling bridges and hidden services correctly,
26770 and we started the process of better handling the dreaded "my Vidalia
26771 died, and now my Tor demands a password when I try to reconnect to it"
26775 - Don't decide to make a new descriptor when receiving a HUP signal.
26776 This bug has caused a lot of 0.2.2.x relays to disappear from the
26777 consensus periodically. Fixes the most common case of triggering
26778 bug 1810; bugfix on 0.2.2.7-alpha.
26779 - Actually allow nameservers with IPv6 addresses. Fixes bug 2574.
26780 - Don't try to build descriptors if "ORPort auto" is set and we
26781 don't know our actual ORPort yet. Fix for bug 3216; bugfix on
26783 - Resolve a crash that occurred when setting BridgeRelay to 1 with
26784 accounting enabled. Fixes bug 3228; bugfix on 0.2.2.18-alpha.
26785 - Apply circuit timeouts to opened hidden-service-related circuits
26786 based on the correct start time. Previously, we would apply the
26787 circuit build timeout based on time since the circuit's creation;
26788 it was supposed to be applied based on time since the circuit
26789 entered its current state. Bugfix on 0.0.6; fixes part of bug 1297.
26790 - Use the same circuit timeout for client-side introduction
26791 circuits as for other four-hop circuits, rather than the timeout
26792 for single-hop directory-fetch circuits; the shorter timeout may
26793 have been appropriate with the static circuit build timeout in
26794 0.2.1.x and earlier, but caused many hidden service access attempts
26795 to fail with the adaptive CBT introduced in 0.2.2.2-alpha. Bugfix
26796 on 0.2.2.2-alpha; fixes another part of bug 1297.
26797 - In ticket 2511 we fixed a case where you could use an unconfigured
26798 bridge if you had configured it as a bridge the last time you ran
26799 Tor. Now fix another edge case: if you had configured it as a bridge
26800 but then switched to a different bridge via the controller, you
26801 would still be willing to use the old one. Bugfix on 0.2.0.1-alpha;
26805 - Add an __OwningControllerProcess configuration option and a
26806 TAKEOWNERSHIP control-port command. Now a Tor controller can ensure
26807 that when it exits, Tor will shut down. Implements feature 3049.
26808 - If "UseBridges 1" is set and no bridges are configured, Tor will
26809 now refuse to build any circuits until some bridges are set.
26810 If "UseBridges auto" is set, Tor will use bridges if they are
26811 configured and we are not running as a server, but otherwise will
26812 make circuits as usual. The new default is "auto". Patch by anonym,
26813 so the Tails LiveCD can stop automatically revealing you as a Tor
26817 - Fix warnings from GCC 4.6's "-Wunused-but-set-variable" option.
26818 - Remove a trailing asterisk from "exit-policy/default" in the
26819 output of the control port command "GETINFO info/names". Bugfix
26821 - Use a wide type to hold sockets when built for 64-bit Windows builds.
26823 - Warn when the user configures two HiddenServiceDir lines that point
26824 to the same directory. Bugfix on 0.0.6 (the version introducing
26825 HiddenServiceDir); fixes bug 3289.
26826 - Remove dead code from rend_cache_lookup_v2_desc_as_dir. Fixes
26827 part of bug 2748; bugfix on 0.2.0.10-alpha.
26828 - Log malformed requests for rendezvous descriptors as protocol
26829 warnings, not warnings. Also, use a more informative log message
26830 in case someone sees it at log level warning without prior
26831 info-level messages. Fixes the other part of bug 2748; bugfix
26833 - Clear the table recording the time of the last request for each
26834 hidden service descriptor from each HS directory on SIGNAL NEWNYM.
26835 Previously, we would clear our HS descriptor cache on SIGNAL
26836 NEWNYM, but if we had previously retrieved a descriptor (or tried
26837 to) from every directory responsible for it, we would refuse to
26838 fetch it again for up to 15 minutes. Bugfix on 0.2.2.25-alpha;
26840 - Fix a log message that said "bits" while displaying a value in
26841 bytes. Found by wanoskarnet. Fixes bug 3318; bugfix on
26843 - When checking for 1024-bit keys, check for 1024 bits, not 128
26844 bytes. This allows Tor to correctly discard keys of length 1017
26845 through 1023. Bugfix on 0.0.9pre5.
26848 - Relays now log the reason for publishing a new relay descriptor,
26849 so we have a better chance of hunting down instances of bug 1810.
26850 Resolves ticket 3252.
26851 - Revise most log messages that refer to nodes by nickname to
26852 instead use the "$key=nickname at address" format. This should be
26853 more useful, especially since nicknames are less and less likely
26854 to be unique. Resolves ticket 3045.
26855 - Log (at info level) when purging pieces of hidden-service-client
26856 state because of SIGNAL NEWNYM.
26859 - Remove undocumented option "-F" from tor-resolve: it hasn't done
26860 anything since 0.2.1.16-rc.
26863 Changes in version 0.2.2.27-beta - 2011-05-18
26864 Tor 0.2.2.27-beta fixes a bridge-related stability bug in the previous
26865 release, and also adds a few more general bugfixes.
26868 - Fix a crash bug when changing bridges in a running Tor process.
26869 Fixes bug 3213; bugfix on 0.2.2.26-beta.
26870 - When the controller configures a new bridge, don't wait 10 to 60
26871 seconds before trying to fetch its descriptor. Bugfix on
26872 0.2.0.3-alpha; fixes bug 3198 (suggested by 2355).
26875 - Require that onion keys have exponent 65537 in microdescriptors too.
26876 Fixes more of bug 3207; bugfix on 0.2.2.26-beta.
26877 - Tor used to limit HttpProxyAuthenticator values to 48 characters.
26878 Changed the limit to 512 characters by removing base64 newlines.
26879 Fixes bug 2752. Fix by Michael Yakubovich.
26880 - When a client starts or stops using bridges, never use a circuit
26881 that was built before the configuration change. This behavior could
26882 put at risk a user who uses bridges to ensure that her traffic
26883 only goes to the chosen addresses. Bugfix on 0.2.0.3-alpha; fixes
26887 Changes in version 0.2.2.26-beta - 2011-05-17
26888 Tor 0.2.2.26-beta fixes a variety of potential privacy problems. It
26889 also introduces a new "socksport auto" approach that should make it
26890 easier to run multiple Tors on the same system, and does a lot of
26891 cleanup to get us closer to a release candidate.
26893 o Security/privacy fixes:
26894 - Replace all potentially sensitive memory comparison operations
26895 with versions whose runtime does not depend on the data being
26896 compared. This will help resist a class of attacks where an
26897 adversary can use variations in timing information to learn
26898 sensitive data. Fix for one case of bug 3122. (Safe memcmp
26899 implementation by Robert Ransom based partially on code by DJB.)
26900 - When receiving a hidden service descriptor, check that it is for
26901 the hidden service we wanted. Previously, Tor would store any
26902 hidden service descriptors that a directory gave it, whether it
26903 wanted them or not. This wouldn't have let an attacker impersonate
26904 a hidden service, but it did let directories pre-seed a client
26905 with descriptors that it didn't want. Bugfix on 0.0.6.
26906 - On SIGHUP, do not clear out all TrackHostExits mappings, client
26907 DNS cache entries, and virtual address mappings: that's what
26908 NEWNYM is for. Fixes bug 1345; bugfix on 0.1.0.1-rc.
26911 - The options SocksPort, ControlPort, and so on now all accept a
26912 value "auto" that opens a socket on an OS-selected port. A
26913 new ControlPortWriteToFile option tells Tor to write its
26914 actual control port or ports to a chosen file. If the option
26915 ControlPortFileGroupReadable is set, the file is created as
26916 group-readable. Now users can run two Tor clients on the same
26917 system without needing to manually mess with parameters. Resolves
26918 part of ticket 3076.
26919 - Set SO_REUSEADDR on all sockets, not just listeners. This should
26920 help busy exit nodes avoid running out of useable ports just
26921 because all the ports have been used in the near past. Resolves
26925 - New "GETINFO net/listeners/(type)" controller command to return
26926 a list of addresses and ports that are bound for listeners for a
26927 given connection type. This is useful when the user has configured
26928 "SocksPort auto" and the controller needs to know which port got
26929 chosen. Resolves another part of ticket 3076.
26930 - Add a new ControlSocketsGroupWritable configuration option: when
26931 it is turned on, ControlSockets are group-writeable by the default
26932 group of the current user. Patch by Jérémy Bobbio; implements
26934 - Tor now refuses to create a ControlSocket in a directory that is
26935 world-readable (or group-readable if ControlSocketsGroupWritable
26936 is 0). This is necessary because some operating systems do not
26937 enforce permissions on an AF_UNIX sockets. Permissions on the
26938 directory holding the socket, however, seems to work everywhere.
26939 - Rate-limit a warning about failures to download v2 networkstatus
26940 documents. Resolves part of bug 1352.
26941 - Backport code from 0.2.3.x that allows directory authorities to
26942 clean their microdescriptor caches. Needed to resolve bug 2230.
26943 - When an HTTPS proxy reports "403 Forbidden", we now explain
26944 what it means rather than calling it an unexpected status code.
26945 Closes bug 2503. Patch from Michael Yakubovich.
26946 - Update to the May 1 2011 Maxmind GeoLite Country database.
26949 - Authorities now clean their microdesc cache periodically and when
26950 reading from disk initially, not only when adding new descriptors.
26951 This prevents a bug where we could lose microdescriptors. Bugfix
26952 on 0.2.2.6-alpha. Fixes bug 2230.
26953 - Do not crash when our configuration file becomes unreadable, for
26954 example due to a permissions change, between when we start up
26955 and when a controller calls SAVECONF. Fixes bug 3135; bugfix
26957 - Avoid a bug that would keep us from replacing a microdescriptor
26958 cache on Windows. (We would try to replace the file while still
26959 holding it open. That's fine on Unix, but Windows doesn't let us
26960 do that.) Bugfix on 0.2.2.6-alpha; bug found by wanoskarnet.
26961 - Add missing explanations for the authority-related torrc options
26962 RephistTrackTime, BridgePassword, and V3AuthUseLegacyKey in the
26963 man page. Resolves issue 2379.
26964 - As an authority, do not upload our own vote or signature set to
26965 ourself. It would tell us nothing new, and as of 0.2.2.24-alpha,
26966 it would get flagged as a duplicate. Resolves bug 3026.
26967 - Accept hidden service descriptors if we think we might be a hidden
26968 service directory, regardless of what our consensus says. This
26969 helps robustness, since clients and hidden services can sometimes
26970 have a more up-to-date view of the network consensus than we do,
26971 and if they think that the directory authorities list us a HSDir,
26972 we might actually be one. Related to bug 2732; bugfix on
26974 - When a controller changes TrackHostExits, remove mappings for
26975 hosts that should no longer have their exits tracked. Bugfix on
26977 - When a controller changes VirtualAddrNetwork, remove any mappings
26978 for hosts that were automapped to the old network. Bugfix on
26980 - When a controller changes one of the AutomapHosts* options, remove
26981 any mappings for hosts that should no longer be automapped. Bugfix
26983 - Do not reset the bridge descriptor download status every time we
26984 re-parse our configuration or get a configuration change. Fixes
26985 bug 3019; bugfix on 0.2.0.3-alpha.
26987 o Minor bugfixes (code cleanup):
26988 - When loading the microdesc journal, remember its current size.
26989 In 0.2.2, this helps prevent the microdesc journal from growing
26990 without limit on authorities (who are the only ones to use it in
26991 0.2.2). Fixes a part of bug 2230; bugfix on 0.2.2.6-alpha.
26992 Fix posted by "cypherpunks."
26993 - The microdesc journal is supposed to get rebuilt only if it is
26994 at least _half_ the length of the store, not _twice_ the length
26995 of the store. Bugfix on 0.2.2.6-alpha; fixes part of bug 2230.
26996 - Fix a potential null-pointer dereference while computing a
26997 consensus. Bugfix on 0.2.0.3-alpha, found with the help of
26999 - Avoid a possible null-pointer dereference when rebuilding the mdesc
27000 cache without actually having any descriptors to cache. Bugfix on
27001 0.2.2.6-alpha. Issue discovered using clang's static analyzer.
27002 - If we fail to compute the identity digest of a v3 legacy keypair,
27003 warn, and don't use a buffer-full of junk instead. Bugfix on
27004 0.2.1.1-alpha; fixes bug 3106.
27005 - Resolve an untriggerable issue in smartlist_string_num_isin(),
27006 where if the function had ever in the future been used to check
27007 for the presence of a too-large number, it would have given an
27008 incorrect result. (Fortunately, we only used it for 16-bit
27009 values.) Fixes bug 3175; bugfix on 0.1.0.1-rc.
27010 - Require that introduction point keys and onion handshake keys
27011 have a public exponent of 65537. Starts to fix bug 3207; bugfix
27014 o Removed features:
27015 - Caches no longer download and serve v2 networkstatus documents
27016 unless FetchV2Networkstatus flag is set: these documents haven't
27017 haven't been used by clients or relays since 0.2.0.x. Resolves
27021 Changes in version 0.2.3.1-alpha - 2011-05-05
27022 Tor 0.2.3.1-alpha adds some new experimental features, including support
27023 for an improved network IO backend, IOCP networking on Windows,
27024 microdescriptor caching, "fast-start" support for streams, and automatic
27025 home router configuration. There are also numerous internal improvements
27026 to try to make the code easier for developers to work with.
27028 This is the first alpha release in a new series, so expect there to be
27029 bugs. Users who would rather test out a more stable branch should
27030 stay with 0.2.2.x for now.
27033 - Tor can now optionally build with the "bufferevents" buffered IO
27034 backend provided by Libevent 2. To use this feature, make sure you
27035 have the latest possible version of Libevent, and pass the
27036 --enable-bufferevents flag to configure when building Tor from
27037 source. This feature will make our networking code more flexible,
27038 let us stack layers on each other, and let us use more efficient
27039 zero-copy transports where available.
27040 - As an experimental feature, Tor can use IOCP for networking on Windows.
27041 Once this code is tuned and optimized, it promises much better
27042 performance than the select-based backend we've used in the past. To
27043 try this feature, you must build Tor with Libevent 2, configure Tor
27044 with the "bufferevents" buffered IO backend, and add "DisableIOCP 0" to
27045 your torrc. There are known bugs here: only try this if you can help
27046 debug it as it breaks.
27047 - The EntryNodes option can now include country codes like {de} or IP
27048 addresses or network masks. Previously we had disallowed these options
27049 because we didn't have an efficient way to keep the list up to
27050 date. Fixes bug 1982, but see bug 2798 for an unresolved issue here.
27051 - Exit nodes now accept and queue data on not-yet-connected streams.
27052 Previously, the client wasn't allowed to send data until the stream was
27053 connected, which slowed down all connections. This change will enable
27054 clients to perform a "fast-start" on streams and send data without
27055 having to wait for a confirmation that the stream has opened. (Patch
27056 from Ian Goldberg; implements the server side of Proposal 174.)
27057 - Tor now has initial support for automatic port mapping on the many
27058 home routers that support NAT-PMP or UPnP. (Not yet supported on
27059 Windows). To build the support code, you'll need to have libnatpnp
27060 library and/or the libminiupnpc library, and you'll need to enable the
27061 feature specifically by passing "--enable-upnp" and/or
27062 "--enable-natpnp" to configure. To turn it on, use the new
27063 PortForwarding option.
27064 - Caches now download, cache, and serve multiple "flavors" of the
27065 consensus, including a flavor that describes microdescriptors.
27066 - Caches now download, cache, and serve microdescriptors -- small
27067 summaries of router descriptors that are authenticated by all of the
27068 directory authorities. Once enough caches are running this code,
27069 clients will be able to save significant amounts of directory bandwidth
27070 by downloading microdescriptors instead of router descriptors.
27073 - Make logging resolution configurable with a new LogTimeGranularity
27074 option, and change the default from 1 millisecond to 1 second.
27075 Implements enhancement 1668.
27076 - We log which torrc file we're using on startup. Implements ticket
27078 - Ordinarily, Tor does not count traffic from private addresses (like
27079 127.0.0.1 or 10.0.0.1) when calculating rate limits or accounting.
27080 There is now a new option, CountPrivateBandwidth, to disable this
27081 behavior. Patch from Daniel Cagara.
27082 - New --enable-static-tor configure option for building Tor as
27083 statically as possible. Idea, general hackery and thoughts from
27084 Alexei Czeskis, John Gilmore, Jacob Appelbaum. Implements ticket
27086 - If you set the NumCPUs option to 0, Tor will now try to detect how
27087 many CPUs you have. This is the new default behavior.
27088 - Turn on directory request statistics by default and include them in
27089 extra-info descriptors. Don't break if we have no GeoIP database.
27090 - Relays that set "ConnDirectionStatistics 1" write statistics on the
27091 bidirectional use of connections to disk every 24 hours.
27092 - Add a GeoIP file digest to the extra-info descriptor. Implements
27094 - The NodeFamily option -- which let you declare that you want to
27095 consider nodes to be part of a family whether they list themselves
27096 that way or not -- now allows IP address ranges and country codes.
27097 - Add a new 'Heartbeat' log message type to periodically log a message
27098 describing Tor's status at level Notice. This feature is meant for
27099 operators who log at notice, and want to make sure that their Tor
27100 server is still working. Implementation by George Kadianakis.
27102 o Minor bugfixes (on 0.2.2.25-alpha):
27103 - When loading the microdesc journal, remember its current size.
27104 In 0.2.2, this helps prevent the microdesc journal from growing
27105 without limit on authorities (who are the only ones to use it in
27106 0.2.2). Fixes a part of bug 2230; bugfix on 0.2.2.6-alpha.
27107 Fix posted by "cypherpunks."
27108 - The microdesc journal is supposed to get rebuilt only if it is
27109 at least _half_ the length of the store, not _twice_ the length
27110 of the store. Bugfix on 0.2.2.6-alpha; fixes part of bug 2230.
27111 - If as an authority we fail to compute the identity digest of a v3
27112 legacy keypair, warn, and don't use a buffer-full of junk instead.
27113 Bugfix on 0.2.1.1-alpha; fixes bug 3106.
27114 - Authorities now clean their microdesc cache periodically and when
27115 reading from disk initially, not only when adding new descriptors.
27116 This prevents a bug where we could lose microdescriptors. Bugfix
27119 o Minor features (controller):
27120 - Add a new SIGNAL event to the controller interface so that
27121 controllers can be notified when Tor handles a signal. Resolves
27122 issue 1955. Patch by John Brooks.
27123 - Add a new GETINFO option to get total bytes read and written. Patch
27124 from pipe, revised by atagar. Resolves ticket 2345.
27125 - Implement some GETINFO controller fields to provide information about
27126 the Tor process's pid, euid, username, and resource limits.
27129 - Our build system requires automake 1.6 or later to create the
27130 Makefile.in files. Previously, you could have used 1.4.
27131 This only affects developers and people building Tor from git;
27132 people who build Tor from the source distribution without changing
27133 the Makefile.am files should be fine.
27134 - Our autogen.sh script uses autoreconf to launch autoconf, automake, and
27135 so on. This is more robust against some of the failure modes
27136 associated with running the autotools pieces on their own.
27138 o Minor packaging issues:
27139 - On OpenSUSE, create the /var/run/tor directory on startup if it is not
27140 already created. Patch from Andreas Stieger. Fixes bug 2573.
27142 o Code simplifications and refactoring:
27143 - A major revision to our internal node-selecting and listing logic.
27144 Tor already had at least two major ways to look at the question of
27145 "which Tor servers do we know about": a list of router descriptors,
27146 and a list of entries in the current consensus. With
27147 microdescriptors, we're adding a third. Having so many systems
27148 without an abstraction layer over them was hurting the codebase.
27149 Now, we have a new "node_t" abstraction that presents a consistent
27150 interface to a client's view of a Tor node, and holds (nearly) all
27151 of the mutable state formerly in routerinfo_t and routerstatus_t.
27152 - The helper programs tor-gencert, tor-resolve, and tor-checkkey
27153 no longer link against Libevent: they never used it, but
27154 our library structure used to force them to link it.
27156 o Removed features:
27157 - Remove some old code to work around even older versions of Tor that
27158 used forked processes to handle DNS requests. Such versions of Tor
27159 are no longer in use as servers.
27161 o Documentation fixes:
27162 - Correct a broken faq link in the INSTALL file. Fixes bug 2307.
27163 - Add missing documentation for the authority-related torrc options
27164 RephistTrackTime, BridgePassword, and V3AuthUseLegacyKey. Resolves
27168 Changes in version 0.2.2.25-alpha - 2011-04-29
27169 Tor 0.2.2.25-alpha fixes many bugs: hidden service clients are more
27170 robust, routers no longer overreport their bandwidth, Win7 should crash
27171 a little less, and NEWNYM (as used by Vidalia's "new identity" button)
27172 now prevents hidden service-related activity from being linkable. It
27173 provides more information to Vidalia so you can see if your bridge is
27174 working. Also, 0.2.2.25-alpha revamps the Entry/Exit/ExcludeNodes and
27175 StrictNodes configuration options to make them more reliable, more
27176 understandable, and more regularly applied. If you use those options,
27177 please see the revised documentation for them in the manual page.
27180 - Relays were publishing grossly inflated bandwidth values because
27181 they were writing their state files wrong--now they write the
27182 correct value. Also, resume reading bandwidth history from the
27183 state file correctly. Fixes bug 2704; bugfix on 0.2.2.23-alpha.
27184 - Improve hidden service robustness: When we find that we have
27185 extended a hidden service's introduction circuit to a relay not
27186 listed as an introduction point in the HS descriptor we currently
27187 have, retry with an introduction point from the current
27188 descriptor. Previously we would just give up. Fixes bugs 1024 and
27189 1930; bugfix on 0.2.0.10-alpha.
27190 - Clients now stop trying to use an exit node associated with a given
27191 destination by TrackHostExits if they fail to reach that exit node.
27192 Fixes bug 2999. Bugfix on 0.2.0.20-rc.
27193 - Fix crash bug on platforms where gmtime and localtime can return
27194 NULL. Windows 7 users were running into this one. Fixes part of bug
27195 2077. Bugfix on all versions of Tor. Found by boboper.
27197 o Security and stability fixes:
27198 - Don't double-free a parsable, but invalid, microdescriptor, even if
27199 it is followed in the blob we're parsing by an unparsable
27200 microdescriptor. Fixes an issue reported in a comment on bug 2954.
27201 Bugfix on 0.2.2.6-alpha; fix by "cypherpunks".
27202 - If the Nickname configuration option isn't given, Tor would pick a
27203 nickname based on the local hostname as the nickname for a relay.
27204 Because nicknames are not very important in today's Tor and the
27205 "Unnamed" nickname has been implemented, this is now problematic
27206 behavior: It leaks information about the hostname without being
27207 useful at all. Fixes bug 2979; bugfix on 0.1.2.2-alpha, which
27208 introduced the Unnamed nickname. Reported by tagnaq.
27209 - Fix an uncommon assertion failure when running with DNSPort under
27210 heavy load. Fixes bug 2933; bugfix on 0.2.0.1-alpha.
27211 - Avoid linkability based on cached hidden service descriptors: forget
27212 all hidden service descriptors cached as a client when processing a
27213 SIGNAL NEWNYM command. Fixes bug 3000; bugfix on 0.0.6.
27216 - Export GeoIP information on bridge usage to controllers even if we
27217 have not yet been running for 24 hours. Now Vidalia bridge operators
27218 can get more accurate and immediate feedback about their
27219 contributions to the network.
27221 o Major features and bugfixes (node selection):
27222 - Revise and reconcile the meaning of the ExitNodes, EntryNodes,
27223 ExcludeEntryNodes, ExcludeExitNodes, ExcludeNodes, and StrictNodes
27224 options. Previously, we had been ambiguous in describing what
27225 counted as an "exit" node, and what operations exactly "StrictNodes
27226 0" would permit. This created confusion when people saw nodes built
27227 through unexpected circuits, and made it hard to tell real bugs from
27228 surprises. Now the intended behavior is:
27229 . "Exit", in the context of ExitNodes and ExcludeExitNodes, means
27230 a node that delivers user traffic outside the Tor network.
27231 . "Entry", in the context of EntryNodes, means a node used as the
27232 first hop of a multihop circuit. It doesn't include direct
27233 connections to directory servers.
27234 . "ExcludeNodes" applies to all nodes.
27235 . "StrictNodes" changes the behavior of ExcludeNodes only. When
27236 StrictNodes is set, Tor should avoid all nodes listed in
27237 ExcludeNodes, even when it will make user requests fail. When
27238 StrictNodes is *not* set, then Tor should follow ExcludeNodes
27239 whenever it can, except when it must use an excluded node to
27240 perform self-tests, connect to a hidden service, provide a
27241 hidden service, fulfill a .exit request, upload directory
27242 information, or fetch directory information.
27243 Collectively, the changes to implement the behavior fix bug 1090.
27244 - ExcludeNodes now takes precedence over EntryNodes and ExitNodes: if
27245 a node is listed in both, it's treated as excluded.
27246 - ExcludeNodes now applies to directory nodes -- as a preference if
27247 StrictNodes is 0, or an absolute requirement if StrictNodes is 1.
27248 Don't exclude all the directory authorities and set StrictNodes to 1
27249 unless you really want your Tor to break.
27250 - ExcludeNodes and ExcludeExitNodes now override exit enclaving.
27251 - ExcludeExitNodes now overrides .exit requests.
27252 - We don't use bridges listed in ExcludeNodes.
27253 - When StrictNodes is 1:
27254 . We now apply ExcludeNodes to hidden service introduction points
27255 and to rendezvous points selected by hidden service users. This
27256 can make your hidden service less reliable: use it with caution!
27257 . If we have used ExcludeNodes on ourself, do not try relay
27258 reachability self-tests.
27259 . If we have excluded all the directory authorities, we will not
27260 even try to upload our descriptor if we're a relay.
27261 . Do not honor .exit requests to an excluded node.
27262 - Remove a misfeature that caused us to ignore the Fast/Stable flags
27263 when ExitNodes is set. Bugfix on 0.2.2.7-alpha.
27264 - When the set of permitted nodes changes, we now remove any mappings
27265 introduced via TrackExitHosts to now-excluded nodes. Bugfix on
27267 - We never cannibalize a circuit that had excluded nodes on it, even
27268 if StrictNodes is 0. Bugfix on 0.1.0.1-rc.
27269 - Revert a change where we would be laxer about attaching streams to
27270 circuits than when building the circuits. This was meant to prevent
27271 a set of bugs where streams were never attachable, but our improved
27272 code here should make this unnecessary. Bugfix on 0.2.2.7-alpha.
27273 - Keep track of how many times we launch a new circuit to handle a
27274 given stream. Too many launches could indicate an inconsistency
27275 between our "launch a circuit to handle this stream" logic and our
27276 "attach this stream to one of the available circuits" logic.
27277 - Improve log messages related to excluded nodes.
27280 - Fix a spurious warning when moving from a short month to a long
27281 month on relays with month-based BandwidthAccounting. Bugfix on
27282 0.2.2.17-alpha; fixes bug 3020.
27283 - When a client finds that an origin circuit has run out of 16-bit
27284 stream IDs, we now mark it as unusable for new streams. Previously,
27285 we would try to close the entire circuit. Bugfix on 0.0.6.
27286 - Add a forgotten cast that caused a compile warning on OS X 10.6.
27287 Bugfix on 0.2.2.24-alpha.
27288 - Be more careful about reporting the correct error from a failed
27289 connect() system call. Under some circumstances, it was possible to
27290 look at an incorrect value for errno when sending the end reason.
27291 Bugfix on 0.1.0.1-rc.
27292 - Correctly handle an "impossible" overflow cases in connection byte
27293 counting, where we write or read more than 4GB on an edge connection
27294 in a single second. Bugfix on 0.1.2.8-beta.
27295 - Correct the warning displayed when a rendezvous descriptor exceeds
27296 the maximum size. Fixes bug 2750; bugfix on 0.2.1.5-alpha. Found by
27298 - Clients and hidden services now use HSDir-flagged relays for hidden
27299 service descriptor downloads and uploads even if the relays have no
27300 DirPort set and the client has disabled TunnelDirConns. This will
27301 eventually allow us to give the HSDir flag to relays with no
27302 DirPort. Fixes bug 2722; bugfix on 0.2.1.6-alpha.
27303 - Downgrade "no current certificates known for authority" message from
27304 Notice to Info. Fixes bug 2899; bugfix on 0.2.0.10-alpha.
27305 - Make the SIGNAL DUMP control-port command work on FreeBSD. Fixes bug
27306 2917. Bugfix on 0.1.1.1-alpha.
27307 - Only limit the lengths of single HS descriptors, even when multiple
27308 HS descriptors are published to an HSDir relay in a single POST
27309 operation. Fixes bug 2948; bugfix on 0.2.1.5-alpha. Found by hsdir.
27310 - Write the current time into the LastWritten line in our state file,
27311 rather than the time from the previous write attempt. Also, stop
27312 trying to use a time of -1 in our log statements. Fixes bug 3039;
27313 bugfix on 0.2.2.14-alpha.
27314 - Be more consistent in our treatment of file system paths. "~" should
27315 get expanded to the user's home directory in the Log config option.
27316 Fixes bug 2971; bugfix on 0.2.0.1-alpha, which introduced the
27317 feature for the -f and --DataDirectory options.
27320 - Make sure every relay writes a state file at least every 12 hours.
27321 Previously, a relay could go for weeks without writing its state
27322 file, and on a crash could lose its bandwidth history, capacity
27323 estimates, client country statistics, and so on. Addresses bug 3012.
27324 - Send END_STREAM_REASON_NOROUTE in response to EHOSTUNREACH errors.
27325 Clients before 0.2.1.27 didn't handle NOROUTE correctly, but such
27326 clients are already deprecated because of security bugs.
27327 - Don't allow v0 hidden service authorities to act as clients.
27328 Required by fix for bug 3000.
27329 - Ignore SIGNAL NEWNYM commands on relay-only Tor instances. Required
27330 by fix for bug 3000.
27331 - Ensure that no empty [dirreq-](read|write)-history lines are added
27332 to an extrainfo document. Implements ticket 2497.
27334 o Code simplification and refactoring:
27335 - Remove workaround code to handle directory responses from servers
27336 that had bug 539 (they would send HTTP status 503 responses _and_
27337 send a body too). Since only server versions before
27338 0.2.0.16-alpha/0.1.2.19 were affected, there is no longer reason to
27339 keep the workaround in place.
27340 - Remove the old 'fuzzy time' logic. It was supposed to be used for
27341 handling calculations where we have a known amount of clock skew and
27342 an allowed amount of unknown skew. But we only used it in three
27343 places, and we never adjusted the known/unknown skew values. This is
27344 still something we might want to do someday, but if we do, we'll
27345 want to do it differently.
27346 - Avoid signed/unsigned comparisons by making SIZE_T_CEILING unsigned.
27347 None of the cases where we did this before were wrong, but by making
27348 this change we avoid warnings. Fixes bug 2475; bugfix on 0.2.1.28.
27349 - Use GetTempDir to find the proper temporary directory location on
27350 Windows when generating temporary files for the unit tests. Patch by
27354 Changes in version 0.2.2.24-alpha - 2011-04-08
27355 Tor 0.2.2.24-alpha fixes a variety of bugs, including a big bug that
27356 prevented Tor clients from effectively using "multihomed" bridges,
27357 that is, bridges that listen on multiple ports or IP addresses so users
27358 can continue to use some of their addresses even if others get blocked.
27361 - Fix a bug where bridge users who configure the non-canonical
27362 address of a bridge automatically switch to its canonical
27363 address. If a bridge listens at more than one address, it should be
27364 able to advertise those addresses independently and any non-blocked
27365 addresses should continue to work. Bugfix on Tor 0.2.0.x. Fixes
27367 - If you configured Tor to use bridge A, and then quit and
27368 configured Tor to use bridge B instead, it would happily continue
27369 to use bridge A if it's still reachable. While this behavior is
27370 a feature if your goal is connectivity, in some scenarios it's a
27371 dangerous bug. Bugfix on Tor 0.2.0.1-alpha; fixes bug 2511.
27372 - Directory authorities now use data collected from their own
27373 uptime observations when choosing whether to assign the HSDir flag
27374 to relays, instead of trusting the uptime value the relay reports in
27375 its descriptor. This change helps prevent an attack where a small
27376 set of nodes with frequently-changing identity keys can blackhole
27377 a hidden service. (Only authorities need upgrade; others will be
27378 fine once they do.) Bugfix on 0.2.0.10-alpha; fixes bug 2709.
27381 - When we restart our relay, we might get a successful connection
27382 from the outside before we've started our reachability tests,
27383 triggering a warning: "ORPort found reachable, but I have no
27384 routerinfo yet. Failing to inform controller of success." This
27385 bug was harmless unless Tor is running under a controller
27386 like Vidalia, in which case the controller would never get a
27387 REACHABILITY_SUCCEEDED status event. Bugfix on 0.1.2.6-alpha;
27389 - Make directory authorities more accurate at recording when
27390 relays that have failed several reachability tests became
27391 unreachable, so we can provide more accuracy at assigning Stable,
27392 Guard, HSDir, etc flags. Bugfix on 0.2.0.6-alpha. Resolves bug 2716.
27393 - Fix an issue that prevented static linking of libevent on
27394 some platforms (notably Linux). Fixes bug 2698; bugfix on
27395 versions 0.2.1.23/0.2.2.8-alpha (the versions introducing
27396 the --with-static-libevent configure option).
27397 - We now ask the other side of a stream (the client or the exit)
27398 for more data on that stream when the amount of queued data on
27399 that stream dips low enough. Previously, we wouldn't ask the
27400 other side for more data until either it sent us more data (which
27401 it wasn't supposed to do if it had exhausted its window!) or we
27402 had completely flushed all our queued data. This flow control fix
27403 should improve throughput. Fixes bug 2756; bugfix on the earliest
27404 released versions of Tor (svn commit r152).
27405 - Avoid a double-mark-for-free warning when failing to attach a
27406 transparent proxy connection. (We thought we had fixed this in
27407 0.2.2.23-alpha, but it turns out our fix was checking the wrong
27408 connection.) Fixes bug 2757; bugfix on 0.1.2.1-alpha (the original
27409 bug) and 0.2.2.23-alpha (the incorrect fix).
27410 - When warning about missing zlib development packages during compile,
27411 give the correct package names. Bugfix on 0.2.0.1-alpha.
27414 - Directory authorities now log the source of a rejected POSTed v3
27415 networkstatus vote.
27416 - Make compilation with clang possible when using
27417 --enable-gcc-warnings by removing two warning options that clang
27418 hasn't implemented yet and by fixing a few warnings. Implements
27420 - When expiring circuits, use microsecond timers rather than
27421 one-second timers. This can avoid an unpleasant situation where a
27422 circuit is launched near the end of one second and expired right
27423 near the beginning of the next, and prevent fluctuations in circuit
27425 - Use computed circuit-build timeouts to decide when to launch
27426 parallel introduction circuits for hidden services. (Previously,
27427 we would retry after 15 seconds.)
27428 - Update to the April 1 2011 Maxmind GeoLite Country database.
27431 - Create the /var/run/tor directory on startup on OpenSUSE if it is
27432 not already created. Patch from Andreas Stieger. Fixes bug 2573.
27434 o Documentation changes:
27435 - Modernize the doxygen configuration file slightly. Fixes bug 2707.
27436 - Resolve all doxygen warnings except those for missing documentation.
27438 - Add doxygen documentation for more functions, fields, and types.
27441 Changes in version 0.2.2.23-alpha - 2011-03-08
27442 Tor 0.2.2.23-alpha lets relays record their bandwidth history so when
27443 they restart they don't lose their bandwidth capacity estimate. This
27444 release also fixes a diverse set of user-facing bugs, ranging from
27445 relays overrunning their rate limiting to clients falsely warning about
27446 clock skew to bridge descriptor leaks by our bridge directory authority.
27449 - Stop sending a CLOCK_SKEW controller status event whenever
27450 we fetch directory information from a relay that has a wrong clock.
27451 Instead, only inform the controller when it's a trusted authority
27452 that claims our clock is wrong. Bugfix on 0.1.2.6-alpha; fixes
27453 the rest of bug 1074.
27454 - Fix an assert in parsing router descriptors containing IPv6
27455 addresses. This one took down the directory authorities when
27456 somebody tried some experimental code. Bugfix on 0.2.1.3-alpha.
27457 - Make the bridge directory authority refuse to answer directory
27458 requests for "all" descriptors. It used to include bridge
27459 descriptors in its answer, which was a major information leak.
27460 Found by "piebeer". Bugfix on 0.2.0.3-alpha.
27461 - If relays set RelayBandwidthBurst but not RelayBandwidthRate,
27462 Tor would ignore their RelayBandwidthBurst setting,
27463 potentially using more bandwidth than expected. Bugfix on
27464 0.2.0.1-alpha. Reported by Paul Wouters. Fixes bug 2470.
27465 - Ignore and warn if the user mistakenly sets "PublishServerDescriptor
27466 hidserv" in her torrc. The 'hidserv' argument never controlled
27467 publication of hidden service descriptors. Bugfix on 0.2.0.1-alpha.
27470 - Relays now save observed peak bandwidth throughput rates to their
27471 state file (along with total usage, which was already saved)
27472 so that they can determine their correct estimated bandwidth on
27473 restart. Resolves bug 1863, where Tor relays would reset their
27474 estimated bandwidth to 0 after restarting.
27475 - Directory authorities now take changes in router IP address and
27476 ORPort into account when determining router stability. Previously,
27477 if a router changed its IP or ORPort, the authorities would not
27478 treat it as having any downtime for the purposes of stability
27479 calculation, whereas clients would experience downtime since the
27480 change could take a while to propagate to them. Resolves issue 1035.
27481 - Enable Address Space Layout Randomization (ASLR) and Data Execution
27482 Prevention (DEP) by default on Windows to make it harder for
27483 attackers to exploit vulnerabilities. Patch from John Brooks.
27485 o Minor bugfixes (on 0.2.1.x and earlier):
27486 - Fix a rare crash bug that could occur when a client was configured
27487 with a large number of bridges. Fixes bug 2629; bugfix on
27488 0.2.1.2-alpha. Bugfix by trac user "shitlei".
27489 - Avoid a double mark-for-free warning when failing to attach a
27490 transparent proxy connection. Bugfix on 0.1.2.1-alpha. Fixes
27492 - Correctly detect failure to allocate an OpenSSL BIO. Fixes bug 2378;
27493 found by "cypherpunks". This bug was introduced before the first
27494 Tor release, in svn commit r110.
27495 - Country codes aren't supported in EntryNodes until 0.2.3.x, so
27496 don't mention them in the manpage. Fixes bug 2450; issue
27497 spotted by keb and G-Lo.
27498 - Fix a bug in bandwidth history state parsing that could have been
27499 triggered if a future version of Tor ever changed the timing
27500 granularity at which bandwidth history is measured. Bugfix on
27501 Tor 0.1.1.11-alpha.
27502 - When a relay decides that its DNS is too broken for it to serve
27503 as an exit server, it advertised itself as a non-exit, but
27504 continued to act as an exit. This could create accidental
27505 partitioning opportunities for users. Instead, if a relay is
27506 going to advertise reject *:* as its exit policy, it should
27507 really act with exit policy "reject *:*". Fixes bug 2366.
27508 Bugfix on Tor 0.1.2.5-alpha. Bugfix by user "postman" on trac.
27509 - In the special case where you configure a public exit relay as your
27510 bridge, Tor would be willing to use that exit relay as the last
27511 hop in your circuit as well. Now we fail that circuit instead.
27512 Bugfix on 0.2.0.12-alpha. Fixes bug 2403. Reported by "piebeer".
27513 - Fix a bug with our locking implementation on Windows that couldn't
27514 correctly detect when a file was already locked. Fixes bug 2504,
27515 bugfix on 0.2.1.6-alpha.
27516 - Fix IPv6-related connect() failures on some platforms (BSD, OS X).
27517 Bugfix on 0.2.0.3-alpha; fixes first part of bug 2660. Patch by
27519 - Set target port in get_interface_address6() correctly. Bugfix
27520 on 0.1.1.4-alpha and 0.2.0.3-alpha; fixes second part of bug 2660.
27521 - Directory authorities are now more robust to hops back in time
27522 when calculating router stability. Previously, if a run of uptime
27523 or downtime appeared to be negative, the calculation could give
27524 incorrect results. Bugfix on 0.2.0.6-alpha; noticed when fixing
27526 - Fix an assert that got triggered when using the TestingTorNetwork
27527 configuration option and then issuing a GETINFO config-text control
27528 command. Fixes bug 2250; bugfix on 0.2.1.2-alpha.
27530 o Minor bugfixes (on 0.2.2.x):
27531 - Clients should not weight BadExit nodes as Exits in their node
27532 selection. Similarly, directory authorities should not count BadExit
27533 bandwidth as Exit bandwidth when computing bandwidth-weights.
27534 Bugfix on 0.2.2.10-alpha; fixes bug 2203.
27535 - Correctly clear our dir_read/dir_write history when there is an
27536 error parsing any bw history value from the state file. Bugfix on
27537 Tor 0.2.2.15-alpha.
27538 - Resolve a bug in verifying signatures of directory objects
27539 with digests longer than SHA1. Bugfix on 0.2.2.20-alpha.
27540 Fixes bug 2409. Found by "piebeer".
27541 - Bridge authorities no longer crash on SIGHUP when they try to
27542 publish their relay descriptor to themselves. Fixes bug 2572. Bugfix
27546 - Log less aggressively about circuit timeout changes, and improve
27547 some other circuit timeout messages. Resolves bug 2004.
27548 - Log a little more clearly about the times at which we're no longer
27549 accepting new connections. Resolves bug 2181.
27550 - Reject attempts at the client side to open connections to private
27551 IP addresses (like 127.0.0.1, 10.0.0.1, and so on) with
27552 a randomly chosen exit node. Attempts to do so are always
27553 ill-defined, generally prevented by exit policies, and usually
27554 in error. This will also help to detect loops in transparent
27555 proxy configurations. You can disable this feature by setting
27556 "ClientRejectInternalAddresses 0" in your torrc.
27557 - Always treat failure to allocate an RSA key as an unrecoverable
27559 - Update to the March 1 2011 Maxmind GeoLite Country database.
27561 o Minor features (log subsystem):
27562 - Add documentation for configuring logging at different severities in
27563 different log domains. We've had this feature since 0.2.1.1-alpha,
27564 but for some reason it never made it into the manpage. Fixes
27566 - Make it simpler to specify "All log domains except for A and B".
27567 Previously you needed to say "[*,~A,~B]". Now you can just say
27569 - Add a "LogMessageDomains 1" option to include the domains of log
27570 messages along with the messages. Without this, there's no way
27571 to use log domains without reading the source or doing a lot
27574 o Packaging changes:
27575 - Stop shipping the Tor specs files and development proposal documents
27576 in the tarball. They are now in a separate git repository at
27577 git://git.torproject.org/torspec.git
27580 Changes in version 0.2.1.30 - 2011-02-23
27581 Tor 0.2.1.30 fixes a variety of less critical bugs. The main other
27582 change is a slight tweak to Tor's TLS handshake that makes relays
27583 and bridges that run this new version reachable from Iran again.
27584 We don't expect this tweak will win the arms race long-term, but it
27585 buys us time until we roll out a better solution.
27588 - Stop sending a CLOCK_SKEW controller status event whenever
27589 we fetch directory information from a relay that has a wrong clock.
27590 Instead, only inform the controller when it's a trusted authority
27591 that claims our clock is wrong. Bugfix on 0.1.2.6-alpha; fixes
27592 the rest of bug 1074.
27593 - Fix a bounds-checking error that could allow an attacker to
27594 remotely crash a directory authority. Bugfix on 0.2.1.5-alpha.
27595 Found by "piebeer".
27596 - If relays set RelayBandwidthBurst but not RelayBandwidthRate,
27597 Tor would ignore their RelayBandwidthBurst setting,
27598 potentially using more bandwidth than expected. Bugfix on
27599 0.2.0.1-alpha. Reported by Paul Wouters. Fixes bug 2470.
27600 - Ignore and warn if the user mistakenly sets "PublishServerDescriptor
27601 hidserv" in her torrc. The 'hidserv' argument never controlled
27602 publication of hidden service descriptors. Bugfix on 0.2.0.1-alpha.
27605 - Adjust our TLS Diffie-Hellman parameters to match those used by
27607 - Update to the February 1 2011 Maxmind GeoLite Country database.
27610 - Check for and reject overly long directory certificates and
27611 directory tokens before they have a chance to hit any assertions.
27612 Bugfix on 0.2.1.28. Found by "doorss".
27613 - Bring the logic that gathers routerinfos and assesses the
27614 acceptability of circuits into line. This prevents a Tor OP from
27615 getting locked in a cycle of choosing its local OR as an exit for a
27616 path (due to a .exit request) and then rejecting the circuit because
27617 its OR is not listed yet. It also prevents Tor clients from using an
27618 OR running in the same instance as an exit (due to a .exit request)
27619 if the OR does not meet the same requirements expected of an OR
27620 running elsewhere. Fixes bug 1859; bugfix on 0.1.0.1-rc.
27622 o Packaging changes:
27623 - Stop shipping the Tor specs files and development proposal documents
27624 in the tarball. They are now in a separate git repository at
27625 git://git.torproject.org/torspec.git
27626 - Do not include Git version tags as though they are SVN tags when
27627 generating a tarball from inside a repository that has switched
27628 between branches. Bugfix on 0.2.1.15-rc; fixes bug 2402.
27631 Changes in version 0.2.2.22-alpha - 2011-01-25
27632 Tor 0.2.2.22-alpha fixes a few more less-critical security issues. The
27633 main other change is a slight tweak to Tor's TLS handshake that makes
27634 relays and bridges that run this new version reachable from Iran again.
27635 We don't expect this tweak will win the arms race long-term, but it
27636 will buy us a bit more time until we roll out a better solution.
27639 - Fix a bounds-checking error that could allow an attacker to
27640 remotely crash a directory authority. Bugfix on 0.2.1.5-alpha.
27641 Found by "piebeer".
27642 - Don't assert when changing from bridge to relay or vice versa
27643 via the controller. The assert happened because we didn't properly
27644 initialize our keys in this case. Bugfix on 0.2.2.18-alpha; fixes
27645 bug 2433. Reported by bastik.
27648 - Adjust our TLS Diffie-Hellman parameters to match those used by
27650 - Provide a log message stating which geoip file we're parsing
27651 instead of just stating that we're parsing the geoip file.
27652 Implements ticket 2432.
27655 - Check for and reject overly long directory certificates and
27656 directory tokens before they have a chance to hit any assertions.
27657 Bugfix on 0.2.1.28 / 0.2.2.20-alpha. Found by "doorss".
27660 Changes in version 0.2.2.21-alpha - 2011-01-15
27661 Tor 0.2.2.21-alpha includes all the patches from Tor 0.2.1.29, which
27662 continues our recent code security audit work. The main fix resolves
27663 a remote heap overflow vulnerability that can allow remote code
27664 execution (CVE-2011-0427). Other fixes address a variety of assert
27665 and crash bugs, most of which we think are hard to exploit remotely.
27667 o Major bugfixes (security), also included in 0.2.1.29:
27668 - Fix a heap overflow bug where an adversary could cause heap
27669 corruption. This bug probably allows remote code execution
27670 attacks. Reported by "debuger". Fixes CVE-2011-0427. Bugfix on
27672 - Prevent a denial-of-service attack by disallowing any
27673 zlib-compressed data whose compression factor is implausibly
27674 high. Fixes part of bug 2324; reported by "doorss".
27675 - Zero out a few more keys in memory before freeing them. Fixes
27676 bug 2384 and part of bug 2385. These key instances found by
27677 "cypherpunks", based on Andrew Case's report about being able
27678 to find sensitive data in Tor's memory space if you have enough
27679 permissions. Bugfix on 0.0.2pre9.
27681 o Major bugfixes (crashes), also included in 0.2.1.29:
27682 - Prevent calls to Libevent from inside Libevent log handlers.
27683 This had potential to cause a nasty set of crashes, especially
27684 if running Libevent with debug logging enabled, and running
27685 Tor with a controller watching for low-severity log messages.
27686 Bugfix on 0.1.0.2-rc. Fixes bug 2190.
27687 - Add a check for SIZE_T_MAX to tor_realloc() to try to avoid
27688 underflow errors there too. Fixes the other part of bug 2324.
27689 - Fix a bug where we would assert if we ever had a
27690 cached-descriptors.new file (or another file read directly into
27691 memory) of exactly SIZE_T_CEILING bytes. Fixes bug 2326; bugfix
27692 on 0.2.1.25. Found by doorss.
27693 - Fix some potential asserts and parsing issues with grossly
27694 malformed router caches. Fixes bug 2352; bugfix on Tor 0.2.1.27.
27697 o Minor bugfixes (other), also included in 0.2.1.29:
27698 - Fix a bug with handling misformed replies to reverse DNS lookup
27699 requests in DNSPort. Bugfix on Tor 0.2.0.1-alpha. Related to a
27700 bug reported by doorss.
27701 - Fix compilation on mingw when a pthreads compatibility library
27702 has been installed. (We don't want to use it, so we shouldn't
27703 be including pthread.h.) Fixes bug 2313; bugfix on 0.1.0.1-rc.
27704 - Fix a bug where we would declare that we had run out of virtual
27705 addresses when the address space was only half-exhausted. Bugfix
27707 - Correctly handle the case where AutomapHostsOnResolve is set but
27708 no virtual addresses are available. Fixes bug 2328; bugfix on
27709 0.1.2.1-alpha. Bug found by doorss.
27710 - Correctly handle wrapping around when we run out of virtual
27711 address space. Found by cypherpunks; bugfix on 0.2.0.5-alpha.
27713 o Minor features, also included in 0.2.1.29:
27714 - Update to the January 1 2011 Maxmind GeoLite Country database.
27715 - Introduce output size checks on all of our decryption functions.
27717 o Build changes, also included in 0.2.1.29:
27718 - Tor does not build packages correctly with Automake 1.6 and earlier;
27719 added a check to Makefile.am to make sure that we're building with
27720 Automake 1.7 or later.
27721 - The 0.2.1.28 tarball was missing src/common/OpenBSD_malloc_Linux.c
27722 because we built it with a too-old version of automake. Thus that
27723 release broke ./configure --enable-openbsd-malloc, which is popular
27724 among really fast exit relays on Linux.
27726 o Major bugfixes, new in 0.2.2.21-alpha:
27727 - Prevent crash/heap corruption when the cbtnummodes consensus
27728 parameter is set to 0 or large values. Fixes bug 2317; bugfix
27731 o Major features, new in 0.2.2.21-alpha:
27732 - Introduce minimum/maximum values that clients will believe
27733 from the consensus. Now we'll have a better chance to avoid crashes
27734 or worse when a consensus param has a weird value.
27736 o Minor features, new in 0.2.2.21-alpha:
27737 - Make sure to disable DirPort if running as a bridge. DirPorts aren't
27738 used on bridges, and it makes bridge scanning somewhat easier.
27739 - If writing the state file to disk fails, wait up to an hour before
27740 retrying again, rather than trying again each second. Fixes bug
27741 2346; bugfix on Tor 0.1.1.3-alpha.
27742 - Make Libevent log messages get delivered to controllers later,
27743 and not from inside the Libevent log handler. This prevents unsafe
27744 reentrant Libevent calls while still letting the log messages
27746 - Detect platforms that brokenly use a signed size_t, and refuse to
27747 build there. Found and analyzed by doorss and rransom.
27748 - Fix a bunch of compile warnings revealed by mingw with gcc 4.5.
27751 o Minor bugfixes, new in 0.2.2.21-alpha:
27752 - Handle SOCKS messages longer than 128 bytes long correctly, rather
27753 than waiting forever for them to finish. Fixes bug 2330; bugfix
27754 on 0.2.0.16-alpha. Found by doorss.
27755 - Add assertions to check for overflow in arguments to
27756 base32_encode() and base32_decode(); fix a signed-unsigned
27757 comparison there too. These bugs are not actually reachable in Tor,
27758 but it's good to prevent future errors too. Found by doorss.
27759 - Correctly detect failures to create DNS requests when using Libevent
27760 versions before v2. (Before Libevent 2, we used our own evdns
27761 implementation. Its return values for Libevent's evdns_resolve_*()
27762 functions are not consistent with those from Libevent.) Fixes bug
27763 2363; bugfix on 0.2.2.6-alpha. Found by "lodger".
27765 o Documentation, new in 0.2.2.21-alpha:
27766 - Document the default socks host and port (127.0.0.1:9050) for
27770 Changes in version 0.2.1.29 - 2011-01-15
27771 Tor 0.2.1.29 continues our recent code security audit work. The main
27772 fix resolves a remote heap overflow vulnerability that can allow remote
27773 code execution. Other fixes address a variety of assert and crash bugs,
27774 most of which we think are hard to exploit remotely.
27776 o Major bugfixes (security):
27777 - Fix a heap overflow bug where an adversary could cause heap
27778 corruption. This bug probably allows remote code execution
27779 attacks. Reported by "debuger". Fixes CVE-2011-0427. Bugfix on
27781 - Prevent a denial-of-service attack by disallowing any
27782 zlib-compressed data whose compression factor is implausibly
27783 high. Fixes part of bug 2324; reported by "doorss".
27784 - Zero out a few more keys in memory before freeing them. Fixes
27785 bug 2384 and part of bug 2385. These key instances found by
27786 "cypherpunks", based on Andrew Case's report about being able
27787 to find sensitive data in Tor's memory space if you have enough
27788 permissions. Bugfix on 0.0.2pre9.
27790 o Major bugfixes (crashes):
27791 - Prevent calls to Libevent from inside Libevent log handlers.
27792 This had potential to cause a nasty set of crashes, especially
27793 if running Libevent with debug logging enabled, and running
27794 Tor with a controller watching for low-severity log messages.
27795 Bugfix on 0.1.0.2-rc. Fixes bug 2190.
27796 - Add a check for SIZE_T_MAX to tor_realloc() to try to avoid
27797 underflow errors there too. Fixes the other part of bug 2324.
27798 - Fix a bug where we would assert if we ever had a
27799 cached-descriptors.new file (or another file read directly into
27800 memory) of exactly SIZE_T_CEILING bytes. Fixes bug 2326; bugfix
27801 on 0.2.1.25. Found by doorss.
27802 - Fix some potential asserts and parsing issues with grossly
27803 malformed router caches. Fixes bug 2352; bugfix on Tor 0.2.1.27.
27806 o Minor bugfixes (other):
27807 - Fix a bug with handling misformed replies to reverse DNS lookup
27808 requests in DNSPort. Bugfix on Tor 0.2.0.1-alpha. Related to a
27809 bug reported by doorss.
27810 - Fix compilation on mingw when a pthreads compatibility library
27811 has been installed. (We don't want to use it, so we shouldn't
27812 be including pthread.h.) Fixes bug 2313; bugfix on 0.1.0.1-rc.
27813 - Fix a bug where we would declare that we had run out of virtual
27814 addresses when the address space was only half-exhausted. Bugfix
27816 - Correctly handle the case where AutomapHostsOnResolve is set but
27817 no virtual addresses are available. Fixes bug 2328; bugfix on
27818 0.1.2.1-alpha. Bug found by doorss.
27819 - Correctly handle wrapping around to when we run out of virtual
27820 address space. Found by cypherpunks, bugfix on 0.2.0.5-alpha.
27821 - The 0.2.1.28 tarball was missing src/common/OpenBSD_malloc_Linux.c
27822 because we built it with a too-old version of automake. Thus that
27823 release broke ./configure --enable-openbsd-malloc, which is popular
27824 among really fast exit relays on Linux.
27827 - Update to the January 1 2011 Maxmind GeoLite Country database.
27828 - Introduce output size checks on all of our decryption functions.
27831 - Tor does not build packages correctly with Automake 1.6 and earlier;
27832 added a check to Makefile.am to make sure that we're building with
27833 Automake 1.7 or later.
27836 Changes in version 0.2.2.20-alpha - 2010-12-17
27837 Tor 0.2.2.20-alpha does some code cleanup to reduce the risk of remotely
27838 exploitable bugs. We also fix a variety of other significant bugs,
27839 change the IP address for one of our directory authorities, and update
27840 the minimum version that Tor relays must run to join the network.
27843 - Fix a remotely exploitable bug that could be used to crash instances
27844 of Tor remotely by overflowing on the heap. Remote-code execution
27845 hasn't been confirmed, but can't be ruled out. Everyone should
27846 upgrade. Bugfix on the 0.1.1 series and later.
27847 - Fix a bug that could break accounting on 64-bit systems with large
27848 time_t values, making them hibernate for impossibly long intervals.
27849 Fixes bug 2146. Bugfix on 0.0.9pre6; fix by boboper.
27850 - Fix a logic error in directory_fetches_from_authorities() that
27851 would cause all _non_-exits refusing single-hop-like circuits
27852 to fetch from authorities, when we wanted to have _exits_ fetch
27853 from authorities. Fixes more of 2097. Bugfix on 0.2.2.16-alpha;
27855 - Fix a stream fairness bug that would cause newer streams on a given
27856 circuit to get preference when reading bytes from the origin or
27857 destination. Fixes bug 2210. Fix by Mashael AlSabah. This bug was
27858 introduced before the first Tor release, in svn revision r152.
27860 o Directory authority changes:
27861 - Change IP address and ports for gabelmoo (v3 directory authority).
27864 - Avoid crashes when AccountingMax is set on clients. Fixes bug 2235.
27865 Bugfix on 0.2.2.18-alpha. Diagnosed by boboper.
27866 - Fix an off-by-one error in calculating some controller command
27867 argument lengths. Fortunately, this mistake is harmless since
27868 the controller code does redundant NUL termination too. Found by
27869 boboper. Bugfix on 0.1.1.1-alpha.
27870 - Do not dereference NULL if a bridge fails to build its
27871 extra-info descriptor. Found by an anonymous commenter on
27872 Trac. Bugfix on 0.2.2.19-alpha.
27875 - Update to the December 1 2010 Maxmind GeoLite Country database.
27876 - Directory authorities now reject relays running any versions of
27877 Tor between 0.2.1.3-alpha and 0.2.1.18 inclusive; they have
27878 known bugs that keep RELAY_EARLY cells from working on rendezvous
27879 circuits. Followup to fix for bug 2081.
27880 - Directory authorities now reject relays running any version of Tor
27881 older than 0.2.0.26-rc. That version is the earliest that fetches
27882 current directory information correctly. Fixes bug 2156.
27883 - Report only the top 10 ports in exit-port stats in order not to
27884 exceed the maximum extra-info descriptor length of 50 KB. Implements
27888 Changes in version 0.2.1.28 - 2010-12-17
27889 Tor 0.2.1.28 does some code cleanup to reduce the risk of remotely
27890 exploitable bugs. We also took this opportunity to change the IP address
27891 for one of our directory authorities, and to update the geoip database
27895 - Fix a remotely exploitable bug that could be used to crash instances
27896 of Tor remotely by overflowing on the heap. Remote-code execution
27897 hasn't been confirmed, but can't be ruled out. Everyone should
27898 upgrade. Bugfix on the 0.1.1 series and later.
27900 o Directory authority changes:
27901 - Change IP address and ports for gabelmoo (v3 directory authority).
27904 - Update to the December 1 2010 Maxmind GeoLite Country database.
27907 Changes in version 0.2.1.27 - 2010-11-23
27908 Yet another OpenSSL security patch broke its compatibility with Tor:
27909 Tor 0.2.1.27 makes relays work with openssl 0.9.8p and 1.0.0.b. We
27910 also took this opportunity to fix several crash bugs, integrate a new
27911 directory authority, and update the bundled GeoIP database.
27914 - Resolve an incompatibility with OpenSSL 0.9.8p and OpenSSL 1.0.0b:
27915 No longer set the tlsext_host_name extension on server SSL objects;
27916 but continue to set it on client SSL objects. Our goal in setting
27917 it was to imitate a browser, not a vhosting server. Fixes bug 2204;
27918 bugfix on 0.2.1.1-alpha.
27919 - Do not log messages to the controller while shrinking buffer
27920 freelists. Doing so would sometimes make the controller connection
27921 try to allocate a buffer chunk, which would mess up the internals
27922 of the freelist and cause an assertion failure. Fixes bug 1125;
27923 fixed by Robert Ransom. Bugfix on 0.2.0.16-alpha.
27924 - Learn our external IP address when we're a relay or bridge, even if
27925 we set PublishServerDescriptor to 0. Bugfix on 0.2.0.3-alpha,
27926 where we introduced bridge relays that don't need to publish to
27927 be useful. Fixes bug 2050.
27928 - Do even more to reject (and not just ignore) annotations on
27929 router descriptors received anywhere but from the cache. Previously
27930 we would ignore such annotations at first, but cache them to disk
27931 anyway. Bugfix on 0.2.0.8-alpha. Found by piebeer.
27932 - When you're using bridges and your network goes away and your
27933 bridges get marked as down, recover when you attempt a new socks
27934 connection (if the network is back), rather than waiting up to an
27935 hour to try fetching new descriptors for your bridges. Bugfix on
27936 0.2.0.3-alpha; fixes bug 1981.
27939 - Move to the November 2010 Maxmind GeoLite country db (rather
27940 than the June 2009 ip-to-country GeoIP db) for our statistics that
27941 count how many users relays are seeing from each country. Now we'll
27942 have more accurate data, especially for many African countries.
27944 o New directory authorities:
27945 - Set up maatuska (run by Linus Nordberg) as the eighth v3 directory
27949 - Fix an assertion failure that could occur in directory caches or
27950 bridge users when using a very short voting interval on a testing
27951 network. Diagnosed by Robert Hogan. Fixes bug 1141; bugfix on
27953 - Enforce multiplicity rules when parsing annotations. Bugfix on
27954 0.2.0.8-alpha. Found by piebeer.
27955 - Allow handshaking OR connections to take a full KeepalivePeriod
27956 seconds to handshake. Previously, we would close them after
27957 IDLE_OR_CONN_TIMEOUT (180) seconds, the same timeout as if they
27958 were open. Bugfix on 0.2.1.26; fixes bug 1840. Thanks to mingw-san
27960 - When building with --enable-gcc-warnings on OpenBSD, disable
27961 warnings in system headers. This makes --enable-gcc-warnings
27962 pass on OpenBSD 4.8.
27965 - Exit nodes didn't recognize EHOSTUNREACH as a plausible error code,
27966 and so sent back END_STREAM_REASON_MISC. Clients now recognize a new
27967 stream ending reason for this case: END_STREAM_REASON_NOROUTE.
27968 Servers can start sending this code when enough clients recognize
27969 it. Bugfix on 0.1.0.1-rc; fixes part of bug 1793.
27970 - Build correctly on mingw with more recent versions of OpenSSL 0.9.8.
27971 Patch from mingw-san.
27974 - Remove the old debian/ directory from the main Tor distribution.
27975 The official Tor-for-debian git repository lives at the URL
27976 https://git.torproject.org/debian/tor.git
27977 - Stop shipping the old doc/website/ directory in the tarball. We
27978 changed the website format in late 2010, and what we shipped in
27979 0.2.1.26 really wasn't that useful anyway.
27982 Changes in version 0.2.2.19-alpha - 2010-11-22
27983 Yet another OpenSSL security patch broke its compatibility with Tor:
27984 Tor 0.2.2.19-alpha makes relays work with OpenSSL 0.9.8p and 1.0.0.b.
27987 - Resolve an incompatibility with OpenSSL 0.9.8p and OpenSSL 1.0.0b:
27988 No longer set the tlsext_host_name extension on server SSL objects;
27989 but continue to set it on client SSL objects. Our goal in setting
27990 it was to imitate a browser, not a vhosting server. Fixes bug 2204;
27991 bugfix on 0.2.1.1-alpha.
27994 - Try harder not to exceed the maximum length of 50 KB when writing
27995 statistics to extra-info descriptors. This bug was triggered by very
27996 fast relays reporting exit-port, entry, and dirreq statistics.
27997 Reported by Olaf Selke. Bugfix on 0.2.2.1-alpha. Fixes bug 2183.
27998 - Publish a router descriptor even if generating an extra-info
27999 descriptor fails. Previously we would not publish a router
28000 descriptor without an extra-info descriptor; this can cause fast
28001 exit relays collecting exit-port statistics to drop from the
28002 consensus. Bugfix on 0.1.2.9-rc; fixes bug 2195.
28005 Changes in version 0.2.2.18-alpha - 2010-11-16
28006 Tor 0.2.2.18-alpha fixes several crash bugs that have been nagging
28007 us lately, makes unpublished bridge relays able to detect their IP
28008 address, and fixes a wide variety of other bugs to get us much closer
28009 to a stable release.
28012 - Do even more to reject (and not just ignore) annotations on
28013 router descriptors received anywhere but from the cache. Previously
28014 we would ignore such annotations at first, but cache them to disk
28015 anyway. Bugfix on 0.2.0.8-alpha. Found by piebeer.
28016 - Do not log messages to the controller while shrinking buffer
28017 freelists. Doing so would sometimes make the controller connection
28018 try to allocate a buffer chunk, which would mess up the internals
28019 of the freelist and cause an assertion failure. Fixes bug 1125;
28020 fixed by Robert Ransom. Bugfix on 0.2.0.16-alpha.
28021 - Learn our external IP address when we're a relay or bridge, even if
28022 we set PublishServerDescriptor to 0. Bugfix on 0.2.0.3-alpha,
28023 where we introduced bridge relays that don't need to publish to
28024 be useful. Fixes bug 2050.
28025 - Maintain separate TLS contexts and certificates for incoming and
28026 outgoing connections in bridge relays. Previously we would use the
28027 same TLS contexts and certs for incoming and outgoing connections.
28028 Bugfix on 0.2.0.3-alpha; addresses bug 988.
28029 - Maintain separate identity keys for incoming and outgoing TLS
28030 contexts in bridge relays. Previously we would use the same
28031 identity keys for incoming and outgoing TLS contexts. Bugfix on
28032 0.2.0.3-alpha; addresses the other half of bug 988.
28033 - Avoid an assertion failure when we as an authority receive a
28034 duplicate upload of a router descriptor that we already have,
28035 but which we previously considered an obsolete descriptor.
28036 Fixes another case of bug 1776. Bugfix on 0.2.2.16-alpha.
28037 - Avoid a crash bug triggered by looking at a dangling pointer while
28038 setting the network status consensus. Found by Robert Ransom.
28039 Bugfix on 0.2.2.17-alpha. Fixes bug 2097.
28040 - Fix a logic error where servers that _didn't_ act as exits would
28041 try to keep their server lists more aggressively up to date than
28042 exits, when it was supposed to be the other way around. Bugfix
28045 o Minor bugfixes (on Tor 0.2.1.x and earlier):
28046 - When we're trying to guess whether we know our IP address as
28047 a relay, we would log various ways that we failed to guess
28048 our address, but never log that we ended up guessing it
28049 successfully. Now add a log line to help confused and anxious
28050 relay operators. Bugfix on 0.1.2.1-alpha; fixes bug 1534.
28051 - Bring the logic that gathers routerinfos and assesses the
28052 acceptability of circuits into line. This prevents a Tor OP from
28053 getting locked in a cycle of choosing its local OR as an exit for a
28054 path (due to a .exit request) and then rejecting the circuit because
28055 its OR is not listed yet. It also prevents Tor clients from using an
28056 OR running in the same instance as an exit (due to a .exit request)
28057 if the OR does not meet the same requirements expected of an OR
28058 running elsewhere. Fixes bug 1859; bugfix on 0.1.0.1-rc.
28059 - Correctly describe errors that occur when generating a TLS object.
28060 Previously we would attribute them to a failure while generating a
28061 TLS context. Patch by Robert Ransom. Bugfix on 0.1.0.4-rc; fixes
28063 - Enforce multiplicity rules when parsing annotations. Bugfix on
28064 0.2.0.8-alpha. Found by piebeer.
28065 - Fix warnings that newer versions of autoconf produced during
28066 ./autogen.sh. These warnings appear to be harmless in our case,
28067 but they were extremely verbose. Fixes bug 2020.
28069 o Minor bugfixes (on Tor 0.2.2.x):
28070 - Enable protection of small arrays whenever we build with gcc
28071 hardening features, not only when also building with warnings
28072 enabled. Fixes bug 2031; bugfix on 0.2.2.14-alpha. Reported by keb.
28075 - Make hidden services work better in private Tor networks by not
28076 requiring any uptime to join the hidden service descriptor
28077 DHT. Implements ticket 2088.
28078 - Rate-limit the "your application is giving Tor only an IP address"
28079 warning. Addresses bug 2000; bugfix on 0.0.8pre2.
28080 - When AllowSingleHopExits is set, print a warning to explain to the
28081 relay operator why most clients are avoiding her relay.
28082 - Update to the November 1 2010 Maxmind GeoLite Country database.
28084 o Code simplifications and refactoring:
28085 - When we fixed bug 1038 we had to put in a restriction not to send
28086 RELAY_EARLY cells on rend circuits. This was necessary as long
28087 as relays using Tor 0.2.1.3-alpha through 0.2.1.18-alpha were
28088 active. Now remove this obsolete check. Resolves bug 2081.
28089 - Some options used different conventions for uppercasing of acronyms
28090 when comparing manpage and source. Fix those in favor of the
28091 manpage, as it makes sense to capitalize acronyms.
28092 - Remove the torrc.complete file. It hasn't been kept up to date
28093 and users will have better luck checking out the manpage.
28094 - Remove the obsolete "NoPublish" option; it has been flagged
28095 as obsolete and has produced a warning since 0.1.1.18-rc.
28096 - Remove everything related to building the expert bundle for OS X.
28097 It has confused many users, doesn't work right on OS X 10.6,
28098 and is hard to get rid of once installed. Resolves bug 1274.
28101 Changes in version 0.2.2.17-alpha - 2010-09-30
28102 Tor 0.2.2.17-alpha introduces a feature to make it harder for clients
28103 to use one-hop circuits (which can put the exit relays at higher risk,
28104 plus unbalance the network); fixes a big bug in bandwidth accounting
28105 for relays that want to limit their monthly bandwidth use; fixes a
28106 big pile of bugs in how clients tolerate temporary network failure;
28107 and makes our adaptive circuit build timeout feature (which improves
28108 client performance if your network is fast while not breaking things
28109 if your network is slow) better handle bad networks.
28112 - Exit relays now try harder to block exit attempts from unknown
28113 relays, to make it harder for people to use them as one-hop proxies
28114 a la tortunnel. Controlled by the refuseunknownexits consensus
28115 parameter (currently enabled), or you can override it on your
28116 relay with the RefuseUnknownExits torrc option. Resolves bug 1751.
28118 o Major bugfixes (0.2.1.x and earlier):
28119 - Fix a bug in bandwidth accounting that could make us use twice
28120 the intended bandwidth when our interval start changes due to
28121 daylight saving time. Now we tolerate skew in stored vs computed
28122 interval starts: if the start of the period changes by no more than
28123 50% of the period's duration, we remember bytes that we transferred
28124 in the old period. Fixes bug 1511; bugfix on 0.0.9pre5.
28125 - Always search the Windows system directory for system DLLs, and
28126 nowhere else. Bugfix on 0.1.1.23; fixes bug 1954.
28127 - When you're using bridges and your network goes away and your
28128 bridges get marked as down, recover when you attempt a new socks
28129 connection (if the network is back), rather than waiting up to an
28130 hour to try fetching new descriptors for your bridges. Bugfix on
28131 0.2.0.3-alpha; fixes bug 1981.
28133 o Major bugfixes (on 0.2.2.x):
28134 - Fix compilation on Windows. Bugfix on 0.2.2.16-alpha; related to
28136 - Fix a segfault that could happen when operating a bridge relay with
28137 no GeoIP database set. Fixes bug 1964; bugfix on 0.2.2.15-alpha.
28138 - The consensus bandwidth-weights (used by clients to choose fast
28139 relays) entered an unexpected edge case in September where
28140 Exits were much scarcer than Guards, resulting in bad weight
28141 recommendations. Now we compute them using new constraints that
28142 should succeed in all cases. Also alter directory authorities to
28143 not include the bandwidth-weights line if they fail to produce
28144 valid values. Fixes bug 1952; bugfix on 0.2.2.10-alpha.
28145 - When weighting bridges during path selection, we used to trust
28146 the bandwidths they provided in their descriptor, only capping them
28147 at 10MB/s. This turned out to be problematic for two reasons:
28148 Bridges could claim to handle a lot more traffic then they
28149 actually would, thus making more clients pick them and have a
28150 pretty effective DoS attack. The other issue is that new bridges
28151 that might not have a good estimate for their bw capacity yet
28152 would not get used at all unless no other bridges are available
28153 to a client. Fixes bug 1912; bugfix on 0.2.2.7-alpha.
28155 o Major bugfixes (on the circuit build timeout feature, 0.2.2.x):
28156 - Ignore cannibalized circuits when recording circuit build times.
28157 This should provide for a minor performance improvement for hidden
28158 service users using 0.2.2.14-alpha, and should remove two spurious
28159 notice log messages. Bugfix on 0.2.2.14-alpha; fixes bug 1740.
28160 - Simplify the logic that causes us to decide if the network is
28161 unavailable for purposes of recording circuit build times. If we
28162 receive no cells whatsoever for the entire duration of a circuit's
28163 full measured lifetime, the network is probably down. Also ignore
28164 one-hop directory fetching circuit timeouts when calculating our
28165 circuit build times. These changes should hopefully reduce the
28166 cases where we see ridiculous circuit build timeouts for people
28167 with spotty wireless connections. Fixes part of bug 1772; bugfix
28169 - Prevent the circuit build timeout from becoming larger than
28170 the maximum build time we have ever seen. Also, prevent the time
28171 period for measurement circuits from becoming larger than twice that
28172 value. Fixes the other part of bug 1772; bugfix on 0.2.2.2-alpha.
28175 - When we run out of directory information such that we can't build
28176 circuits, but then get enough that we can build circuits, log when
28177 we actually construct a circuit, so the user has a better chance of
28178 knowing what's going on. Fixes bug 1362.
28179 - Be more generous with how much bandwidth we'd use up (with
28180 accounting enabled) before entering "soft hibernation". Previously,
28181 we'd refuse new connections and circuits once we'd used up 95% of
28182 our allotment. Now, we use up 95% of our allotment, AND make sure
28183 that we have no more than 500MB (or 3 hours of expected traffic,
28184 whichever is lower) remaining before we enter soft hibernation.
28185 - If we've configured EntryNodes and our network goes away and/or all
28186 our entrynodes get marked down, optimistically retry them all when
28187 a new socks application request appears. Fixes bug 1882.
28188 - Add some more defensive programming for architectures that can't
28189 handle unaligned integer accesses. We don't know of any actual bugs
28190 right now, but that's the best time to fix them. Fixes bug 1943.
28191 - Support line continuations in the torrc config file. If a line
28192 ends with a single backslash character, the newline is ignored, and
28193 the configuration value is treated as continuing on the next line.
28196 o Minor bugfixes (on 0.2.1.x and earlier):
28197 - For bandwidth accounting, calculate our expected bandwidth rate
28198 based on the time during which we were active and not in
28199 soft-hibernation during the last interval. Previously, we were
28200 also considering the time spent in soft-hibernation. If this
28201 was a long time, we would wind up underestimating our bandwidth
28202 by a lot, and skewing our wakeup time towards the start of the
28203 accounting interval. Fixes bug 1789. Bugfix on 0.0.9pre5.
28205 o Minor bugfixes (on 0.2.2.x):
28206 - Resume generating CIRC FAILED REASON=TIMEOUT control port messages,
28207 which were disabled by the circuit build timeout changes in
28208 0.2.2.14-alpha. Bugfix on 0.2.2.14-alpha; fixes bug 1739.
28209 - Make sure we don't warn about missing bandwidth weights when
28210 choosing bridges or other relays not in the consensus. Bugfix on
28211 0.2.2.10-alpha; fixes bug 1805.
28212 - In our logs, do not double-report signatures from unrecognized
28213 authorities both as "from unknown authority" and "not
28214 present". Fixes bug 1956, bugfix on 0.2.2.16-alpha.
28217 Changes in version 0.2.2.16-alpha - 2010-09-17
28218 Tor 0.2.2.16-alpha fixes a variety of old stream fairness bugs (most
28219 evident at exit relays), and also continues to resolve all the little
28220 bugs that have been filling up trac lately.
28222 o Major bugfixes (stream-level fairness):
28223 - When receiving a circuit-level SENDME for a blocked circuit, try
28224 to package cells fairly from all the streams that had previously
28225 been blocked on that circuit. Previously, we had started with the
28226 oldest stream, and allowed each stream to potentially exhaust
28227 the circuit's package window. This gave older streams on any
28228 given circuit priority over newer ones. Fixes bug 1937. Detected
28229 originally by Camilo Viecco. This bug was introduced before the
28230 first Tor release, in svn commit r152: it is the new winner of
28231 the longest-lived bug prize.
28232 - When the exit relay got a circuit-level sendme cell, it started
28233 reading on the exit streams, even if had 500 cells queued in the
28234 circuit queue already, so the circuit queue just grew and grew in
28235 some cases. We fix this by not re-enabling reading on receipt of a
28236 sendme cell when the cell queue is blocked. Fixes bug 1653. Bugfix
28237 on 0.2.0.1-alpha. Detected by Mashael AlSabah. Original patch by
28239 - Newly created streams were allowed to read cells onto circuits,
28240 even if the circuit's cell queue was blocked and waiting to drain.
28241 This created potential unfairness, as older streams would be
28242 blocked, but newer streams would gladly fill the queue completely.
28243 We add code to detect this situation and prevent any stream from
28244 getting more than one free cell. Bugfix on 0.2.0.1-alpha. Partially
28248 - Update to the September 1 2010 Maxmind GeoLite Country database.
28249 - Warn when CookieAuthFileGroupReadable is set but CookieAuthFile is
28250 not. This would lead to a cookie that is still not group readable.
28251 Closes bug 1843. Suggested by katmagic.
28252 - When logging a rate-limited warning, we now mention how many messages
28253 got suppressed since the last warning.
28254 - Add new "perconnbwrate" and "perconnbwburst" consensus params to
28255 do individual connection-level rate limiting of clients. The torrc
28256 config options with the same names trump the consensus params, if
28257 both are present. Replaces the old "bwconnrate" and "bwconnburst"
28258 consensus params which were broken from 0.2.2.7-alpha through
28259 0.2.2.14-alpha. Closes bug 1947.
28260 - When a router changes IP address or port, authorities now launch
28261 a new reachability test for it. Implements ticket 1899.
28262 - Make the formerly ugly "2 unknown, 7 missing key, 0 good, 0 bad,
28263 2 no signature, 4 required" messages about consensus signatures
28264 easier to read, and make sure they get logged at the same severity
28265 as the messages explaining which keys are which. Fixes bug 1290.
28266 - Don't warn when we have a consensus that we can't verify because
28267 of missing certificates, unless those certificates are ones
28268 that we have been trying and failing to download. Fixes bug 1145.
28269 - If you configure your bridge with a known identity fingerprint,
28270 and the bridge authority is unreachable (as it is in at least
28271 one country now), fall back to directly requesting the descriptor
28272 from the bridge. Finishes the feature started in 0.2.0.10-alpha;
28274 - When building with --enable-gcc-warnings on OpenBSD, disable
28275 warnings in system headers. This makes --enable-gcc-warnings
28276 pass on OpenBSD 4.8.
28278 o Minor bugfixes (on 0.2.1.x and earlier):
28279 - Authorities will now attempt to download consensuses if their
28280 own efforts to make a live consensus have failed. This change
28281 means authorities that restart will fetch a valid consensus, and
28282 it means authorities that didn't agree with the current consensus
28283 will still fetch and serve it if it has enough signatures. Bugfix
28284 on 0.2.0.9-alpha; fixes bug 1300.
28285 - Ensure DNS requests launched by "RESOLVE" commands from the
28286 controller respect the __LeaveStreamsUnattached setconf options. The
28287 same goes for requests launched via DNSPort or transparent
28288 proxying. Bugfix on 0.2.0.1-alpha; fixes bug 1525.
28289 - Allow handshaking OR connections to take a full KeepalivePeriod
28290 seconds to handshake. Previously, we would close them after
28291 IDLE_OR_CONN_TIMEOUT (180) seconds, the same timeout as if they
28292 were open. Bugfix on 0.2.1.26; fixes bug 1840. Thanks to mingw-san
28294 - Rate-limit "Failed to hand off onionskin" warnings.
28295 - Never relay a cell for a circuit we have already destroyed.
28296 Between marking a circuit as closeable and finally closing it,
28297 it may have been possible for a few queued cells to get relayed,
28298 even though they would have been immediately dropped by the next
28299 OR in the circuit. Fixes bug 1184; bugfix on 0.2.0.1-alpha.
28300 - Never queue a cell for a circuit that's already been marked
28302 - Never vote for a server as "Running" if we have a descriptor for
28303 it claiming to be hibernating, and that descriptor was published
28304 more recently than our last contact with the server. Bugfix on
28305 0.2.0.3-alpha; fixes bug 911.
28306 - Squash a compile warning on OpenBSD. Reported by Tas; fixes
28309 o Minor bugfixes (on 0.2.2.x):
28310 - Fix a regression introduced in 0.2.2.7-alpha that marked relays
28311 down if a directory fetch fails and you've configured either
28312 bridges or EntryNodes. The intent was to mark the relay as down
28313 _unless_ you're using bridges or EntryNodes, since if you are
28314 then you could quickly run out of entry points.
28315 - Fix the Windows directory-listing code. A bug introduced in
28316 0.2.2.14-alpha could make Windows directory servers forget to load
28317 some of their cached v2 networkstatus files.
28318 - Really allow clients to use relays as bridges. Fixes bug 1776;
28319 bugfix on 0.2.2.15-alpha.
28320 - Demote a warn to info that happens when the CellStatistics option
28321 was just enabled. Bugfix on 0.2.2.15-alpha; fixes bug 1921.
28322 Reported by Moritz Bartl.
28323 - On Windows, build correctly either with or without Unicode support.
28324 This is necessary so that Tor can support fringe platforms like
28325 Windows 98 (which has no Unicode), or Windows CE (which has no
28326 non-Unicode). Bugfix on 0.2.2.14-alpha; fixes bug 1797.
28329 - Add a unit test for cross-platform directory-listing code.
28332 Changes in version 0.2.2.15-alpha - 2010-08-18
28333 Tor 0.2.2.15-alpha fixes a big bug in hidden service availability,
28334 fixes a variety of other bugs that were preventing performance
28335 experiments from moving forward, fixes several bothersome memory leaks,
28336 and generally closes a lot of smaller bugs that have been filling up
28340 - Stop assigning the HSDir flag to relays that disable their
28341 DirPort (and thus will refuse to answer directory requests). This
28342 fix should dramatically improve the reachability of hidden services:
28343 hidden services and hidden service clients pick six HSDir relays
28344 to store and retrieve the hidden service descriptor, and currently
28345 about half of the HSDir relays will refuse to work. Bugfix on
28346 0.2.0.10-alpha; fixes part of bug 1693.
28347 - The PerConnBWRate and Burst config options, along with the
28348 bwconnrate and bwconnburst consensus params, initialized each conn's
28349 token bucket values only when the connection is established. Now we
28350 update them if the config options change, and update them every time
28351 we get a new consensus. Otherwise we can encounter an ugly edge
28352 case where we initialize an OR conn to client-level bandwidth,
28353 but then later the relay joins the consensus and we leave it
28354 throttled. Bugfix on 0.2.2.7-alpha; fixes bug 1830.
28355 - Fix a regression that caused Tor to rebind its ports if it receives
28356 SIGHUP while hibernating. Bugfix in 0.1.1.6-alpha; closes bug 919.
28359 - Lower the maximum weighted-fractional-uptime cutoff to 98%. This
28360 should give us approximately 40-50% more Guard-flagged nodes,
28361 improving the anonymity the Tor network can provide and also
28362 decreasing the dropoff in throughput that relays experience when
28363 they first get the Guard flag.
28364 - Allow enabling or disabling the *Statistics config options while
28368 - Update to the August 1 2010 Maxmind GeoLite Country database.
28369 - Have the controller interface give a more useful message than
28370 "Internal Error" in response to failed GETINFO requests.
28371 - Warn when the same option is provided more than once in a torrc
28372 file, on the command line, or in a single SETCONF statement, and
28373 the option is one that only accepts a single line. Closes bug 1384.
28374 - Build correctly on mingw with more recent versions of OpenSSL 0.9.8.
28375 Patch from mingw-san.
28376 - Add support for the country code "{??}" in torrc options like
28377 ExcludeNodes, to indicate all routers of unknown country. Closes
28379 - Relays report the number of bytes spent on answering directory
28380 requests in extra-info descriptors similar to {read,write}-history.
28381 Implements enhancement 1790.
28383 o Minor bugfixes (on 0.2.1.x and earlier):
28384 - Complain if PublishServerDescriptor is given multiple arguments that
28385 include 0 or 1. This configuration will be rejected in the future.
28386 Bugfix on 0.2.0.1-alpha; closes bug 1107.
28387 - Disallow BridgeRelay 1 and ORPort 0 at once in the configuration.
28388 Bugfix on 0.2.0.13-alpha; closes bug 928.
28389 - Change "Application request when we're believed to be offline."
28390 notice to "Application request when we haven't used client
28391 functionality lately.", to clarify that it's not an error. Bugfix
28392 on 0.0.9.3; fixes bug 1222.
28393 - Fix a bug in the controller interface where "GETINFO ns/asdaskljkl"
28394 would return "551 Internal error" rather than "552 Unrecognized key
28395 ns/asdaskljkl". Bugfix on 0.1.2.3-alpha.
28396 - Users can't configure a regular relay to be their bridge. It didn't
28397 work because when Tor fetched the bridge descriptor, it found
28398 that it already had it, and didn't realize that the purpose of the
28399 descriptor had changed. Now we replace routers with a purpose other
28400 than bridge with bridge descriptors when fetching them. Bugfix on
28401 0.1.1.9-alpha. Bug 1776 not yet fixed because now we immediately
28402 refetch the descriptor with router purpose 'general', disabling
28404 - Fix a rare bug in rend_fn unit tests: we would fail a test when
28405 a randomly generated port is 0. Diagnosed by Matt Edman. Bugfix
28406 on 0.2.0.10-alpha; fixes bug 1808.
28407 - Exit nodes didn't recognize EHOSTUNREACH as a plausible error code,
28408 and so sent back END_STREAM_REASON_MISC. Clients now recognize a new
28409 stream ending reason for this case: END_STREAM_REASON_NOROUTE.
28410 Servers can start sending this code when enough clients recognize
28411 it. Also update the spec to reflect this new reason. Bugfix on
28412 0.1.0.1-rc; fixes part of bug 1793.
28413 - Delay geoip stats collection by bridges for 6 hours, not 2 hours,
28414 when we switch from being a public relay to a bridge. Otherwise
28415 there will still be clients that see the relay in their consensus,
28416 and the stats will end up wrong. Bugfix on 0.2.1.15-rc; fixes bug
28418 - Instead of giving an assertion failure on an internal mismatch
28419 on estimated freelist size, just log a BUG warning and try later.
28420 Mitigates but does not fix bug 1125.
28421 - Fix an assertion failure that could occur in caches or bridge users
28422 when using a very short voting interval on a testing network.
28423 Diagnosed by Robert Hogan. Fixes bug 1141; bugfix on 0.2.0.8-alpha.
28425 o Minor bugfixes (on 0.2.2.x):
28426 - Alter directory authorities to always consider Exit-flagged nodes
28427 as potential Guard nodes in their votes. The actual decision to
28428 use Exits as Guards is done in the consensus bandwidth weights.
28429 Fixes bug 1294; bugfix on 0.2.2.10-alpha.
28430 - When the controller is reporting the purpose of circuits that
28431 didn't finish building before the circuit build timeout, it was
28432 printing UNKNOWN_13. Now print EXPIRED. Bugfix on 0.2.2.14-alpha.
28433 - Our libevent version parsing code couldn't handle versions like
28434 1.4.14b-stable and incorrectly warned the user about using an
28435 old and broken version of libevent. Treat 1.4.14b-stable like
28436 1.4.14-stable when parsing the version. Fixes bug 1731; bugfix
28438 - Don't use substitution references like $(VAR:MOD) when
28439 $(asciidoc_files) is empty -- make(1) on NetBSD transforms
28440 '$(:x)' to 'x' rather than the empty string. This bites us in
28441 doc/ when configured with --disable-asciidoc. Bugfix on
28442 0.2.2.9-alpha; fixes bug 1773.
28443 - Remove a spurious hidden service server-side log notice about
28444 "Ancient non-dirty circuits". Bugfix on 0.2.2.14-alpha; fixes
28446 - Fix compilation with --with-dmalloc set. Bugfix on 0.2.2.6-alpha;
28448 - Correctly report written bytes on linked connections. Found while
28449 implementing 1790. Bugfix on 0.2.2.4-alpha.
28450 - Fix three memory leaks: one in circuit_build_times_parse_state(),
28451 one in dirvote_add_signatures_to_pending_consensus(), and one every
28452 time we parse a v3 network consensus. Bugfixes on 0.2.2.14-alpha,
28453 0.2.2.6-alpha, and 0.2.2.10-alpha respectively; fixes bug 1831.
28455 o Code simplifications and refactoring:
28456 - Take a first step towards making or.h smaller by splitting out
28457 function definitions for all source files in src/or/. Leave
28458 structures and defines in or.h for now.
28459 - Remove a bunch of unused function declarations as well as a block of
28460 #if 0'd code from the unit tests. Closes bug 1824.
28461 - New unit tests for exit-port history statistics; refactored exit
28462 statistics code to be more easily tested.
28463 - Remove the old debian/ directory from the main Tor distribution.
28464 The official Tor-for-debian git repository lives at the URL
28465 https://git.torproject.org/debian/tor.git
28468 Changes in version 0.2.2.14-alpha - 2010-07-12
28469 Tor 0.2.2.14-alpha greatly improves client-side handling of
28470 circuit build timeouts, which are used to estimate speed and improve
28471 performance. We also move to a much better GeoIP database, port Tor to
28472 Windows CE, introduce new compile flags that improve code security,
28473 add an eighth v3 directory authority, and address a lot of more
28477 - Tor directory authorities no longer crash when started with a
28478 cached-microdesc-consensus file in their data directory. Bugfix
28479 on 0.2.2.6-alpha; fixes bug 1532.
28480 - Treat an unset $HOME like an empty $HOME rather than triggering an
28481 assert. Bugfix on 0.0.8pre1; fixes bug 1522.
28482 - Ignore negative and large circuit build timeout values that can
28483 happen during a suspend or hibernate. These values caused various
28484 asserts to fire. Bugfix on 0.2.2.2-alpha; fixes bug 1245.
28485 - Alter calculation of Pareto distribution parameter 'Xm' for
28486 Circuit Build Timeout learning to use the weighted average of the
28487 top N=3 modes (because we have three entry guards). Considering
28488 multiple modes should improve the timeout calculation in some cases,
28489 and prevent extremely high timeout values. Bugfix on 0.2.2.2-alpha;
28491 - Alter calculation of Pareto distribution parameter 'Alpha' to use a
28492 right censored distribution model. This approach improves over the
28493 synthetic timeout generation approach that was producing insanely
28494 high timeout values. Now we calculate build timeouts using truncated
28495 times. Bugfix on 0.2.2.2-alpha; fixes bugs 1245 and 1335.
28496 - Do not close circuits that are under construction when they reach
28497 the circuit build timeout. Instead, leave them building (but do not
28498 use them) for up until the time corresponding to the 95th percentile
28499 on the Pareto CDF or 60 seconds, whichever is greater. This is done
28500 to provide better data for the new Pareto model. This percentile
28501 can be controlled by the consensus.
28504 - Move to the June 2010 Maxmind GeoLite country db (rather than the
28505 June 2009 ip-to-country GeoIP db) for our statistics that count
28506 how many users relays are seeing from each country. Now we have
28507 more accurate data for many African countries.
28508 - Port Tor to build and run correctly on Windows CE systems, using
28509 the wcecompat library. Contributed by Valerio Lupi.
28510 - New "--enable-gcc-hardening" ./configure flag (off by default)
28511 to turn on gcc compile time hardening options. It ensures
28512 that signed ints have defined behavior (-fwrapv), enables
28513 -D_FORTIFY_SOURCE=2 (requiring -O2), adds stack smashing protection
28514 with canaries (-fstack-protector-all), turns on ASLR protection if
28515 supported by the kernel (-fPIE, -pie), and adds additional security
28516 related warnings. Verified to work on Mac OS X and Debian Lenny.
28517 - New "--enable-linker-hardening" ./configure flag (off by default)
28518 to turn on ELF specific hardening features (relro, now). This does
28519 not work with Mac OS X or any other non-ELF binary format.
28521 o New directory authorities:
28522 - Set up maatuska (run by Linus Nordberg) as the eighth v3 directory
28526 - New config option "WarnUnsafeSocks 0" disables the warning that
28527 occurs whenever Tor receives a socks handshake using a version of
28528 the socks protocol that can only provide an IP address (rather
28529 than a hostname). Setups that do DNS locally over Tor are fine,
28530 and we shouldn't spam the logs in that case.
28531 - Convert the HACKING file to asciidoc, and add a few new sections
28532 to it, explaining how we use Git, how we make changelogs, and
28533 what should go in a patch.
28534 - Add a TIMEOUT_RATE keyword to the BUILDTIMEOUT_SET control port
28535 event, to give information on the current rate of circuit timeouts
28536 over our stored history.
28537 - Add ability to disable circuit build time learning via consensus
28538 parameter and via a LearnCircuitBuildTimeout config option. Also
28539 automatically disable circuit build time calculation if we are
28540 either a AuthoritativeDirectory, or if we fail to write our state
28541 file. Fixes bug 1296.
28542 - More gracefully handle corrupt state files, removing asserts
28543 in favor of saving a backup and resetting state.
28544 - Rename the "log.h" header to "torlog.h" so as to conflict with fewer
28548 - Build correctly on OSX with zlib 1.2.4 and higher with all warnings
28550 - When a2x fails, mention that the user could disable manpages instead
28551 of trying to fix their asciidoc installation.
28552 - Where available, use Libevent 2.0's periodic timers so that our
28553 once-per-second cleanup code gets called even more closely to
28554 once per second than it would otherwise. Fixes bug 943.
28555 - If you run a bridge that listens on multiple IP addresses, and
28556 some user configures a bridge address that uses a different IP
28557 address than your bridge writes in its router descriptor, and the
28558 user doesn't specify an identity key, their Tor would discard the
28559 descriptor because "it isn't one of our configured bridges", and
28560 fail to bootstrap. Now believe the descriptor and bootstrap anyway.
28561 Bugfix on 0.2.0.3-alpha.
28562 - If OpenSSL fails to make a duplicate of a private or public key, log
28563 an error message and try to exit cleanly. May help with debugging
28564 if bug 1209 ever remanifests.
28565 - Save a couple bytes in memory allocation every time we escape
28566 certain characters in a string. Patch from Florian Zumbiehl.
28567 - Make it explicit that we don't cannibalize one-hop circuits. This
28568 happens in the wild, but doesn't turn out to be a problem because
28569 we fortunately don't use those circuits. Many thanks to outofwords
28570 for the initial analysis and to swissknife who confirmed that
28571 two-hop circuits are actually created.
28572 - Make directory mirrors report non-zero dirreq-v[23]-shares again.
28573 Fixes bug 1564; bugfix on 0.2.2.9-alpha.
28574 - Eliminate a case where a circuit build time warning was displayed
28575 after network connectivity resumed. Bugfix on 0.2.2.2-alpha.
28578 Changes in version 0.2.1.26 - 2010-05-02
28579 Tor 0.2.1.26 addresses the recent connection and memory overload
28580 problems we've been seeing on relays, especially relays with their
28581 DirPort open. If your relay has been crashing, or you turned it off
28582 because it used too many resources, give this release a try.
28584 This release also fixes yet another instance of broken OpenSSL libraries
28585 that was causing some relays to drop out of the consensus.
28588 - Teach relays to defend themselves from connection overload. Relays
28589 now close idle circuits early if it looks like they were intended
28590 for directory fetches. Relays are also more aggressive about closing
28591 TLS connections that have no circuits on them. Such circuits are
28592 unlikely to be re-used, and tens of thousands of them were piling
28593 up at the fast relays, causing the relays to run out of sockets
28594 and memory. Bugfix on 0.2.0.22-rc (where clients started tunneling
28595 their directory fetches over TLS).
28596 - Fix SSL renegotiation behavior on OpenSSL versions like on Centos
28597 that claim to be earlier than 0.9.8m, but which have in reality
28598 backported huge swaths of 0.9.8m or 0.9.8n renegotiation
28599 behavior. Possible fix for some cases of bug 1346.
28600 - Directory mirrors were fetching relay descriptors only from v2
28601 directory authorities, rather than v3 authorities like they should.
28602 Only 2 v2 authorities remain (compared to 7 v3 authorities), leading
28603 to a serious bottleneck. Bugfix on 0.2.0.9-alpha. Fixes bug 1324.
28606 - Finally get rid of the deprecated and now harmful notion of "clique
28607 mode", where directory authorities maintain TLS connections to
28611 - In the util/threads test, no longer free the test_mutex before all
28612 worker threads have finished. Bugfix on 0.2.1.6-alpha.
28613 - The master thread could starve the worker threads quite badly on
28614 certain systems, causing them to run only partially in the allowed
28615 window. This resulted in test failures. Now the master thread sleeps
28616 occasionally for a few microseconds while the two worker-threads
28617 compete for the mutex. Bugfix on 0.2.0.1-alpha.
28620 Changes in version 0.2.2.13-alpha - 2010-04-24
28621 Tor 0.2.2.13-alpha addresses the recent connection and memory overload
28622 problems we've been seeing on relays, especially relays with their
28623 DirPort open. If your relay has been crashing, or you turned it off
28624 because it used too many resources, give this release a try.
28627 - Teach relays to defend themselves from connection overload. Relays
28628 now close idle circuits early if it looks like they were intended
28629 for directory fetches. Relays are also more aggressive about closing
28630 TLS connections that have no circuits on them. Such circuits are
28631 unlikely to be re-used, and tens of thousands of them were piling
28632 up at the fast relays, causing the relays to run out of sockets
28633 and memory. Bugfix on 0.2.0.22-rc (where clients started tunneling
28634 their directory fetches over TLS).
28637 - Finally get rid of the deprecated and now harmful notion of "clique
28638 mode", where directory authorities maintain TLS connections to
28640 - Directory authorities now do an immediate reachability check as soon
28641 as they hear about a new relay. This change should slightly reduce
28642 the time between setting up a relay and getting listed as running
28643 in the consensus. It should also improve the time between setting
28644 up a bridge and seeing use by bridge users.
28645 - Directory authorities no longer launch a TLS connection to every
28646 relay as they startup. Now that we have 2k+ descriptors cached,
28647 the resulting network hiccup is becoming a burden. Besides,
28648 authorities already avoid voting about Running for the first half
28649 hour of their uptime.
28652 Changes in version 0.2.2.12-alpha - 2010-04-20
28653 Tor 0.2.2.12-alpha fixes a critical bug in how directory authorities
28654 handle and vote on descriptors. It was causing relays to drop out of
28658 - Many relays have been falling out of the consensus lately because
28659 not enough authorities know about their descriptor for them to get
28660 a majority of votes. When we deprecated the v2 directory protocol,
28661 we got rid of the only way that v3 authorities can hear from each
28662 other about other descriptors. Now authorities examine every v3
28663 vote for new descriptors, and fetch them from that authority. Bugfix
28665 - Fix two typos in tor_vasprintf() that broke the compile on Windows,
28666 and a warning in or.h related to bandwidth_weight_rule_t that
28667 prevented clean compile on OS X. Fixes bug 1363; bugfix on
28669 - Fix a segfault on relays when DirReqStatistics is enabled
28670 and 24 hours pass. Bug found by keb. Fixes bug 1365; bugfix on
28674 - Demote a confusing TLS warning that relay operators might get when
28675 someone tries to talk to their OrPort. It is neither the operator's
28676 fault nor can they do anything about it. Fixes bug 1364; bugfix
28680 Changes in version 0.2.2.11-alpha - 2010-04-15
28681 Tor 0.2.2.11-alpha fixes yet another instance of broken OpenSSL
28682 libraries that was causing some relays to drop out of the consensus.
28685 - Directory mirrors were fetching relay descriptors only from v2
28686 directory authorities, rather than v3 authorities like they should.
28687 Only 2 v2 authorities remain (compared to 7 v3 authorities), leading
28688 to a serious bottleneck. Bugfix on 0.2.0.9-alpha. Fixes bug 1324.
28689 - Fix a parsing error that made every possible value of
28690 CircPriorityHalflifeMsec get treated as "1 msec". Bugfix
28691 on 0.2.2.7-alpha. Rename CircPriorityHalflifeMsec to
28692 CircuitPriorityHalflifeMsec, so authorities can tell newer relays
28693 about the option without breaking older ones.
28694 - Fix SSL renegotiation behavior on OpenSSL versions like on Centos
28695 that claim to be earlier than 0.9.8m, but which have in reality
28696 backported huge swaths of 0.9.8m or 0.9.8n renegotiation
28697 behavior. Possible fix for some cases of bug 1346.
28700 - Experiment with a more aggressive approach to preventing clients
28701 from making one-hop exit streams. Exit relays who want to try it
28702 out can set "RefuseUnknownExits 1" in their torrc, and then look
28703 for "Attempt by %s to open a stream" log messages. Let us know
28705 - Add support for statically linking zlib by specifying
28706 --enable-static-zlib, to go with our support for statically linking
28707 openssl and libevent. Resolves bug 1358.
28710 - Fix a segfault that happens whenever a Tor client that is using
28711 libevent2's bufferevents gets a hup signal. Bugfix on 0.2.2.5-alpha;
28713 - When we cleaned up the contrib/tor-exit-notice.html file, we left
28714 out the first line. Fixes bug 1295.
28715 - When building the manpage from a tarball, we required asciidoc, but
28716 the asciidoc -> roff/html conversion was already done for the
28717 tarball. Make 'make' complain only when we need asciidoc (either
28718 because we're compiling directly from git, or because we altered
28719 the asciidoc manpage in the tarball). Bugfix on 0.2.2.9-alpha.
28720 - When none of the directory authorities vote on any params, Tor
28721 segfaulted when trying to make the consensus from the votes. We
28722 didn't trigger the bug in practice, because authorities do include
28723 params in their votes. Bugfix on 0.2.2.10-alpha; fixes bug 1322.
28726 - In the util/threads test, no longer free the test_mutex before all
28727 worker threads have finished. Bugfix on 0.2.1.6-alpha.
28728 - The master thread could starve the worker threads quite badly on
28729 certain systems, causing them to run only partially in the allowed
28730 window. This resulted in test failures. Now the master thread sleeps
28731 occasionally for a few microseconds while the two worker-threads
28732 compete for the mutex. Bugfix on 0.2.0.1-alpha.
28735 Changes in version 0.2.2.10-alpha - 2010-03-07
28736 Tor 0.2.2.10-alpha fixes a regression introduced in 0.2.2.9-alpha that
28737 could prevent relays from guessing their IP address correctly. It also
28738 starts the groundwork for another client-side performance boost, since
28739 currently we're not making efficient use of relays that have both the
28740 Guard flag and the Exit flag.
28743 - Fix a regression from our patch for bug 1244 that caused relays
28744 to guess their IP address incorrectly if they didn't set Address
28745 in their torrc and/or their address fails to resolve. Bugfix on
28746 0.2.2.9-alpha; fixes bug 1269.
28748 o Major features (performance):
28749 - Directory authorities now compute consensus weightings that instruct
28750 clients how to weight relays flagged as Guard, Exit, Guard+Exit,
28751 and no flag. Clients that use these weightings will distribute
28752 network load more evenly across these different relay types. The
28753 weightings are in the consensus so we can change them globally in
28754 the future. Extra thanks to "outofwords" for finding some nasty
28755 security bugs in the first implementation of this feature.
28757 o Minor features (performance):
28758 - Always perform router selections using weighted relay bandwidth,
28759 even if we don't need a high capacity circuit at the time. Non-fast
28760 circuits now only differ from fast ones in that they can use relays
28761 not marked with the Fast flag. This "feature" could turn out to
28762 be a horrible bug; we should investigate more before it goes into
28766 - Allow disabling building of the manpages. Skipping the manpage
28767 speeds up the build considerably.
28769 o Minor bugfixes (on 0.2.2.x):
28770 - Fix a memleak in the EXTENDCIRCUIT logic. Spotted by coverity.
28771 Bugfix on 0.2.2.9-alpha.
28772 - Disallow values larger than INT32_MAX for PerConnBWRate|Burst
28773 config option. Bugfix on 0.2.2.7-alpha.
28774 - Ship the asciidoc-helper file in the tarball, so that people can
28775 build from source if they want to, and touching the .1.txt files
28776 doesn't break the build. Bugfix on 0.2.2.9-alpha.
28778 o Minor bugfixes (on 0.2.1.x or earlier):
28779 - Fix a dereference-then-NULL-check sequence when publishing
28780 descriptors. Bugfix on 0.2.1.5-alpha. Discovered by ekir; fixes
28782 - Fix another dereference-then-NULL-check sequence. Bugfix on
28783 0.2.1.14-rc. Discovered by ekir; fixes bug 1256.
28784 - Make sure we treat potentially not NUL-terminated strings correctly.
28785 Bugfix on 0.1.1.13-alpha. Discovered by rieo; fixes bug 1257.
28787 o Code simplifications and refactoring:
28788 - Fix some urls in the exit notice file and make it XHTML1.1 strict
28789 compliant. Based on a patch from Christian Kujau.
28790 - Don't use sed in asciidoc-helper anymore.
28791 - Make the build process fail if asciidoc cannot be found and
28792 building with asciidoc isn't disabled.
28795 Changes in version 0.2.2.9-alpha - 2010-02-22
28796 Tor 0.2.2.9-alpha makes Tor work again on the latest OS X, updates the
28797 location of a directory authority, and cleans up a bunch of small bugs.
28799 o Directory authority changes:
28800 - Change IP address for dannenberg (v3 directory authority), and
28801 remove moria2 (obsolete v1, v2 directory authority and v0 hidden
28802 service directory authority) from the list.
28805 - Make Tor work again on the latest OS X: when deciding whether to
28806 use strange flags to turn TLS renegotiation on, detect the OpenSSL
28807 version at run-time, not compile time. We need to do this because
28808 Apple doesn't update its dev-tools headers when it updates its
28809 libraries in a security patch.
28810 - Fix a potential buffer overflow in lookup_last_hid_serv_request()
28811 that could happen on 32-bit platforms with 64-bit time_t. Also fix
28812 a memory leak when requesting a hidden service descriptor we've
28813 requested before. Fixes bug 1242, bugfix on 0.2.0.18-alpha. Found
28815 - Authorities could be tricked into giving out the Exit flag to relays
28816 that didn't allow exiting to any ports. This bug could screw
28817 with load balancing and stats. Bugfix on 0.1.1.6-alpha; fixes bug
28818 1238. Bug discovered by Martin Kowalczyk.
28819 - When freeing a session key, zero it out completely. We only zeroed
28820 the first ptrsize bytes. Bugfix on 0.0.2pre8. Discovered and
28821 patched by ekir. Fixes bug 1254.
28824 - Fix static compilation by listing the openssl libraries in the right
28825 order. Bugfix on Tor 0.2.2.8-alpha; fixes bug 1237.
28826 - Resume handling .exit hostnames in a special way: originally we
28827 stripped the .exit part and used the requested exit relay. In
28828 0.2.2.1-alpha we stopped treating them in any special way, meaning
28829 if you use a .exit address then Tor will pass it on to the exit
28830 relay. Now we reject the .exit stream outright, since that behavior
28831 might be more expected by the user. Found and diagnosed by Scott
28832 Bennett and Downie on or-talk.
28833 - Don't spam the controller with events when we have no file
28834 descriptors available. Bugfix on 0.2.1.5-alpha. (Rate-limiting
28835 for log messages was already solved from bug 748.)
28836 - Avoid a bogus overlapped memcpy in tor_addr_copy(). Reported by
28838 - Make the DNSPort option work with libevent 2.x. Don't alter the
28839 behavior for libevent 1.x. Fixes bug 1143. Found by SwissTorExit.
28840 - Emit a GUARD DROPPED controller event for a case we missed.
28841 - Make more fields in the controller protocol case-insensitive, since
28842 control-spec.txt said they were.
28843 - Refactor resolve_my_address() to not use gethostbyname() anymore.
28844 Fixes bug 1244; bugfix on 0.0.2pre25. Reported by Mike Mestnik.
28845 - Fix a spec conformance issue: the network-status-version token
28846 must be the first token in a v3 consensus or vote. Discovered by
28847 parakeep. Bugfix on 0.2.0.3-alpha.
28849 o Code simplifications and refactoring:
28850 - Generate our manpage and HTML documentation using Asciidoc. This
28851 change should make it easier to maintain the documentation, and
28852 produce nicer HTML.
28853 - Remove the --enable-iphone option. According to reports from Marco
28854 Bonetti, Tor builds fine without any special tweaking on recent
28855 iPhone SDK versions.
28856 - Removed some unnecessary files from the source distribution. The
28857 AUTHORS file has now been merged into the people page on the
28858 website. The roadmaps and design doc can now be found in the
28859 projects directory in svn.
28860 - Enabled various circuit build timeout constants to be controlled
28861 by consensus parameters. Also set better defaults for these
28862 parameters based on experimentation on broadband and simulated
28863 high latency links.
28866 - The 'EXTENDCIRCUIT' control port command can now be used with
28867 a circ id of 0 and no path. This feature will cause Tor to build
28868 a new 'fast' general purpose circuit using its own path selection
28870 - Added a BUILDTIMEOUT_SET controller event to describe changes
28871 to the circuit build timeout.
28872 - Future-proof the controller protocol a bit by ignoring keyword
28873 arguments we do not recognize.
28874 - Expand homedirs passed to tor-checkkey. This should silence a
28875 coverity complaint about passing a user-supplied string into
28876 open() without checking it.
28879 Changes in version 0.2.1.25 - 2010-03-16
28880 Tor 0.2.1.25 fixes a regression introduced in 0.2.1.23 that could
28881 prevent relays from guessing their IP address correctly. It also fixes
28882 several minor potential security bugs.
28885 - Fix a regression from our patch for bug 1244 that caused relays
28886 to guess their IP address incorrectly if they didn't set Address
28887 in their torrc and/or their address fails to resolve. Bugfix on
28888 0.2.1.23; fixes bug 1269.
28889 - When freeing a session key, zero it out completely. We only zeroed
28890 the first ptrsize bytes. Bugfix on 0.0.2pre8. Discovered and
28891 patched by ekir. Fixes bug 1254.
28894 - Fix a dereference-then-NULL-check sequence when publishing
28895 descriptors. Bugfix on 0.2.1.5-alpha. Discovered by ekir; fixes
28897 - Fix another dereference-then-NULL-check sequence. Bugfix on
28898 0.2.1.14-rc. Discovered by ekir; fixes bug 1256.
28899 - Make sure we treat potentially not NUL-terminated strings correctly.
28900 Bugfix on 0.1.1.13-alpha. Discovered by rieo; fixes bug 1257.
28904 Changes in version 0.2.1.24 - 2010-02-21
28905 Tor 0.2.1.24 makes Tor work again on the latest OS X -- this time
28909 - Work correctly out-of-the-box with even more vendor-patched versions
28910 of OpenSSL. In particular, make it so Debian and OS X don't need
28911 customized patches to run/build.
28914 Changes in version 0.2.1.23 - 2010-02-13
28915 Tor 0.2.1.23 fixes a huge client-side performance bug, makes Tor work
28916 again on the latest OS X, and updates the location of a directory
28919 o Major bugfixes (performance):
28920 - We were selecting our guards uniformly at random, and then weighting
28921 which of our guards we'd use uniformly at random. This imbalance
28922 meant that Tor clients were severely limited on throughput (and
28923 probably latency too) by the first hop in their circuit. Now we
28924 select guards weighted by currently advertised bandwidth. We also
28925 automatically discard guards picked using the old algorithm. Fixes
28926 bug 1217; bugfix on 0.2.1.3-alpha. Found by Mike Perry.
28929 - Make Tor work again on the latest OS X: when deciding whether to
28930 use strange flags to turn TLS renegotiation on, detect the OpenSSL
28931 version at run-time, not compile time. We need to do this because
28932 Apple doesn't update its dev-tools headers when it updates its
28933 libraries in a security patch.
28934 - Fix a potential buffer overflow in lookup_last_hid_serv_request()
28935 that could happen on 32-bit platforms with 64-bit time_t. Also fix
28936 a memory leak when requesting a hidden service descriptor we've
28937 requested before. Fixes bug 1242, bugfix on 0.2.0.18-alpha. Found
28940 o Directory authority changes:
28941 - Change IP address for dannenberg (v3 directory authority), and
28942 remove moria2 (obsolete v1, v2 directory authority and v0 hidden
28943 service directory authority) from the list.
28946 - Refactor resolve_my_address() to not use gethostbyname() anymore.
28947 Fixes bug 1244; bugfix on 0.0.2pre25. Reported by Mike Mestnik.
28950 - Avoid a mad rush at the beginning of each month when each client
28951 rotates half of its guards. Instead we spread the rotation out
28952 throughout the month, but we still avoid leaving a precise timestamp
28953 in the state file about when we first picked the guard. Improves
28954 over the behavior introduced in 0.1.2.17.
28957 Changes in version 0.2.2.8-alpha - 2010-01-26
28958 Tor 0.2.2.8-alpha fixes a crash bug in 0.2.2.7-alpha that has been
28959 causing bridge relays to disappear. If you're running a bridge,
28963 - Fix a memory corruption bug on bridges that occurred during the
28964 inclusion of stats data in extra-info descriptors. Also fix the
28965 interface for geoip_get_bridge_stats* to prevent similar bugs in
28966 the future. Diagnosis by Tas, patch by Karsten and Sebastian.
28967 Fixes bug 1208; bugfix on 0.2.2.7-alpha.
28970 - Ignore OutboundBindAddress when connecting to localhost.
28971 Connections to localhost need to come _from_ localhost, or else
28972 local servers (like DNS and outgoing HTTP/SOCKS proxies) will often
28976 Changes in version 0.2.2.7-alpha - 2010-01-19
28977 Tor 0.2.2.7-alpha fixes a huge client-side performance bug, as well
28978 as laying the groundwork for further relay-side performance fixes. It
28979 also starts cleaning up client behavior with respect to the EntryNodes,
28980 ExitNodes, and StrictNodes config options.
28982 This release also rotates two directory authority keys, due to a
28983 security breach of some of the Torproject servers.
28985 o Directory authority changes:
28986 - Rotate keys (both v3 identity and relay identity) for moria1
28989 o Major features (performance):
28990 - We were selecting our guards uniformly at random, and then weighting
28991 which of our guards we'd use uniformly at random. This imbalance
28992 meant that Tor clients were severely limited on throughput (and
28993 probably latency too) by the first hop in their circuit. Now we
28994 select guards weighted by currently advertised bandwidth. We also
28995 automatically discard guards picked using the old algorithm. Fixes
28996 bug 1217; bugfix on 0.2.1.3-alpha. Found by Mike Perry.
28997 - When choosing which cells to relay first, relays can now favor
28998 circuits that have been quiet recently, to provide lower latency
28999 for low-volume circuits. By default, relays enable or disable this
29000 feature based on a setting in the consensus. You can override
29001 this default by using the new "CircuitPriorityHalflife" config
29002 option. Design and code by Ian Goldberg, Can Tang, and Chris
29004 - Add separate per-conn write limiting to go with the per-conn read
29005 limiting. We added a global write limit in Tor 0.1.2.5-alpha,
29006 but never per-conn write limits.
29007 - New consensus params "bwconnrate" and "bwconnburst" to let us
29008 rate-limit client connections as they enter the network. It's
29009 controlled in the consensus so we can turn it on and off for
29010 experiments. It's starting out off. Based on proposal 163.
29012 o Major features (relay selection options):
29013 - Switch to a StrictNodes config option, rather than the previous
29014 "StrictEntryNodes" / "StrictExitNodes" separation that was missing a
29015 "StrictExcludeNodes" option.
29016 - If EntryNodes, ExitNodes, ExcludeNodes, or ExcludeExitNodes
29017 change during a config reload, mark and discard all our origin
29018 circuits. This fix should address edge cases where we change the
29019 config options and but then choose a circuit that we created before
29021 - If EntryNodes or ExitNodes are set, be more willing to use an
29022 unsuitable (e.g. slow or unstable) circuit. The user asked for it,
29024 - Make EntryNodes config option much more aggressive even when
29025 StrictNodes is not set. Before it would prepend your requested
29026 entrynodes to your list of guard nodes, but feel free to use others
29027 after that. Now it chooses only from your EntryNodes if any of
29028 those are available, and only falls back to others if a) they're
29029 all down and b) StrictNodes is not set.
29030 - Now we refresh your entry guards from EntryNodes at each consensus
29031 fetch -- rather than just at startup and then they slowly rot as
29032 the network changes.
29035 - Stop bridge directory authorities from answering dbg-stability.txt
29036 directory queries, which would let people fetch a list of all
29037 bridge identities they track. Bugfix on 0.2.1.6-alpha.
29040 - Log a notice when we get a new control connection. Now it's easier
29041 for security-conscious users to recognize when a local application
29042 is knocking on their controller door. Suggested by bug 1196.
29043 - New config option "CircuitStreamTimeout" to override our internal
29044 timeout schedule for how many seconds until we detach a stream from
29045 a circuit and try a new circuit. If your network is particularly
29046 slow, you might want to set this to a number like 60.
29047 - New controller command "getinfo config-text". It returns the
29048 contents that Tor would write if you send it a SAVECONF command,
29049 so the controller can write the file to disk itself.
29050 - New options for SafeLogging to allow scrubbing only log messages
29051 generated while acting as a relay.
29052 - Ship the bridges spec file in the tarball too.
29053 - Avoid a mad rush at the beginning of each month when each client
29054 rotates half of its guards. Instead we spread the rotation out
29055 throughout the month, but we still avoid leaving a precise timestamp
29056 in the state file about when we first picked the guard. Improves
29057 over the behavior introduced in 0.1.2.17.
29059 o Minor bugfixes (compiling):
29060 - Fix compilation on OS X 10.3, which has a stub mlockall() but
29061 hides it. Bugfix on 0.2.2.6-alpha.
29062 - Fix compilation on Solaris by removing support for the
29063 DisableAllSwap config option. Solaris doesn't have an rlimit for
29064 mlockall, so we cannot use it safely. Fixes bug 1198; bugfix on
29067 o Minor bugfixes (crashes):
29068 - Do not segfault when writing buffer stats when we haven't observed
29069 a single circuit to report about. Found by Fabian Lanze. Bugfix on
29071 - If we're in the pathological case where there's no exit bandwidth
29072 but there is non-exit bandwidth, or no guard bandwidth but there
29073 is non-guard bandwidth, don't crash during path selection. Bugfix
29075 - Fix an impossible-to-actually-trigger buffer overflow in relay
29076 descriptor generation. Bugfix on 0.1.0.15.
29078 o Minor bugfixes (privacy):
29079 - Fix an instance where a Tor directory mirror might accidentally
29080 log the IP address of a misbehaving Tor client. Bugfix on
29082 - Don't list Windows capabilities in relay descriptors. We never made
29083 use of them, and maybe it's a bad idea to publish them. Bugfix
29086 o Minor bugfixes (other):
29087 - Resolve an edge case in path weighting that could make us misweight
29088 our relay selection. Fixes bug 1203; bugfix on 0.0.8rc1.
29089 - Fix statistics on client numbers by country as seen by bridges that
29090 were broken in 0.2.2.1-alpha. Also switch to reporting full 24-hour
29091 intervals instead of variable 12-to-48-hour intervals.
29092 - After we free an internal connection structure, overwrite it
29093 with a different memory value than we use for overwriting a freed
29094 internal circuit structure. Should help with debugging. Suggested
29096 - Update our OpenSSL 0.9.8l fix so that it works with OpenSSL 0.9.8m
29099 o Removed features:
29100 - Remove the HSAuthorityRecordStats option that version 0 hidden
29101 service authorities could have used to track statistics of overall
29102 hidden service usage.
29105 Changes in version 0.2.1.22 - 2010-01-19
29106 Tor 0.2.1.22 fixes a critical privacy problem in bridge directory
29107 authorities -- it would tell you its whole history of bridge descriptors
29108 if you make the right directory request. This stable update also
29109 rotates two of the seven v3 directory authority keys and locations.
29111 o Directory authority changes:
29112 - Rotate keys (both v3 identity and relay identity) for moria1
29116 - Stop bridge directory authorities from answering dbg-stability.txt
29117 directory queries, which would let people fetch a list of all
29118 bridge identities they track. Bugfix on 0.2.1.6-alpha.
29121 Changes in version 0.2.1.21 - 2009-12-21
29122 Tor 0.2.1.21 fixes an incompatibility with the most recent OpenSSL
29123 library. If you use Tor on Linux / Unix and you're getting SSL
29124 renegotiation errors, upgrading should help. We also recommend an
29125 upgrade if you're an exit relay.
29128 - Work around a security feature in OpenSSL 0.9.8l that prevents our
29129 handshake from working unless we explicitly tell OpenSSL that we
29130 are using SSL renegotiation safely. We are, of course, but OpenSSL
29131 0.9.8l won't work unless we say we are.
29132 - Avoid crashing if the client is trying to upload many bytes and the
29133 circuit gets torn down at the same time, or if the flip side
29134 happens on the exit relay. Bugfix on 0.2.0.1-alpha; fixes bug 1150.
29137 - Do not refuse to learn about authority certs and v2 networkstatus
29138 documents that are older than the latest consensus. This bug might
29139 have degraded client bootstrapping. Bugfix on 0.2.0.10-alpha.
29140 Spotted and fixed by xmux.
29141 - Fix a couple of very-hard-to-trigger memory leaks, and one hard-to-
29142 trigger platform-specific option misparsing case found by Coverity
29144 - Fix a compilation warning on Fedora 12 by removing an impossible-to-
29145 trigger assert. Fixes bug 1173.
29148 Changes in version 0.2.2.6-alpha - 2009-11-19
29149 Tor 0.2.2.6-alpha lays the groundwork for many upcoming features:
29150 support for the new lower-footprint "microdescriptor" directory design,
29151 future-proofing our consensus format against new hash functions or
29152 other changes, and an Android port. It also makes Tor compatible with
29153 the upcoming OpenSSL 0.9.8l release, and fixes a variety of bugs.
29156 - Directory authorities can now create, vote on, and serve multiple
29157 parallel formats of directory data as part of their voting process.
29158 Partially implements Proposal 162: "Publish the consensus in
29160 - Directory authorities can now agree on and publish small summaries
29161 of router information that clients can use in place of regular
29162 server descriptors. This transition will eventually allow clients
29163 to use far less bandwidth for downloading information about the
29164 network. Begins the implementation of Proposal 158: "Clients
29165 download consensus + microdescriptors".
29166 - The directory voting system is now extensible to use multiple hash
29167 algorithms for signatures and resource selection. Newer formats
29168 are signed with SHA256, with a possibility for moving to a better
29169 hash algorithm in the future.
29170 - New DisableAllSwap option. If set to 1, Tor will attempt to lock all
29171 current and future memory pages via mlockall(). On supported
29172 platforms (modern Linux and probably BSD but not Windows or OS X),
29173 this should effectively disable any and all attempts to page out
29174 memory. This option requires that you start your Tor as root --
29175 if you use DisableAllSwap, please consider using the User option
29176 to properly reduce the privileges of your Tor.
29177 - Numerous changes, bugfixes, and workarounds from Nathan Freitas
29178 to help Tor build correctly for Android phones.
29181 - Work around a security feature in OpenSSL 0.9.8l that prevents our
29182 handshake from working unless we explicitly tell OpenSSL that we
29183 are using SSL renegotiation safely. We are, but OpenSSL 0.9.8l
29184 won't work unless we say we are.
29187 - Fix a crash bug when trying to initialize the evdns module in
29188 Libevent 2. Bugfix on 0.2.1.16-rc.
29189 - Stop logging at severity 'warn' when some other Tor client tries
29190 to establish a circuit with us using weak DH keys. It's a protocol
29191 violation, but that doesn't mean ordinary users need to hear about
29192 it. Fixes the bug part of bug 1114. Bugfix on 0.1.0.13.
29193 - Do not refuse to learn about authority certs and v2 networkstatus
29194 documents that are older than the latest consensus. This bug might
29195 have degraded client bootstrapping. Bugfix on 0.2.0.10-alpha.
29196 Spotted and fixed by xmux.
29197 - Fix numerous small code-flaws found by Coverity Scan Rung 3.
29198 - If all authorities restart at once right before a consensus vote,
29199 nobody will vote about "Running", and clients will get a consensus
29200 with no usable relays. Instead, authorities refuse to build a
29201 consensus if this happens. Bugfix on 0.2.0.10-alpha; fixes bug 1066.
29202 - If your relay can't keep up with the number of incoming create
29203 cells, it would log one warning per failure into your logs. Limit
29204 warnings to 1 per minute. Bugfix on 0.0.2pre10; fixes bug 1042.
29205 - Bridges now use "reject *:*" as their default exit policy. Bugfix
29206 on 0.2.0.3-alpha; fixes bug 1113.
29207 - Fix a memory leak on directory authorities during voting that was
29208 introduced in 0.2.2.1-alpha. Found via valgrind.
29211 Changes in version 0.2.1.20 - 2009-10-15
29212 Tor 0.2.1.20 fixes a crash bug when you're accessing many hidden
29213 services at once, prepares for more performance improvements, and
29214 fixes a bunch of smaller bugs.
29216 The Windows and OS X bundles also include a more recent Vidalia,
29217 and switch from Privoxy to Polipo.
29219 The OS X installers are now drag and drop. It's best to un-install
29220 Tor/Vidalia and then install this new bundle, rather than upgrade. If
29221 you want to upgrade, you'll need to update the paths for Tor and Polipo
29222 in the Vidalia Settings window.
29225 - Send circuit or stream sendme cells when our window has decreased
29226 by 100 cells, not when it has decreased by 101 cells. Bug uncovered
29227 by Karsten when testing the "reduce circuit window" performance
29228 patch. Bugfix on the 54th commit on Tor -- from July 2002,
29229 before the release of Tor 0.0.0. This is the new winner of the
29231 - Fix a remotely triggerable memory leak when a consensus document
29232 contains more than one signature from the same voter. Bugfix on
29234 - Avoid segfault in rare cases when finishing an introduction circuit
29235 as a client and finding out that we don't have an introduction key
29236 for it. Fixes bug 1073. Reported by Aaron Swartz.
29239 - Tor now reads the "circwindow" parameter out of the consensus,
29240 and uses that value for its circuit package window rather than the
29241 default of 1000 cells. Begins the implementation of proposal 168.
29243 o New directory authorities:
29244 - Set up urras (run by Jacob Appelbaum) as the seventh v3 directory
29246 - Move moria1 and tonga to alternate IP addresses.
29249 - Fix a signed/unsigned compile warning in 0.2.1.19.
29250 - Fix possible segmentation fault on directory authorities. Bugfix on
29252 - Fix an extremely rare infinite recursion bug that could occur if
29253 we tried to log a message after shutting down the log subsystem.
29254 Found by Matt Edman. Bugfix on 0.2.0.16-alpha.
29255 - Fix an obscure bug where hidden services on 64-bit big-endian
29256 systems might mis-read the timestamp in v3 introduce cells, and
29257 refuse to connect back to the client. Discovered by "rotor".
29258 Bugfix on 0.2.1.6-alpha.
29259 - We were triggering a CLOCK_SKEW controller status event whenever
29260 we connect via the v2 connection protocol to any relay that has
29261 a wrong clock. Instead, we should only inform the controller when
29262 it's a trusted authority that claims our clock is wrong. Bugfix
29263 on 0.2.0.20-rc; starts to fix bug 1074. Reported by SwissTorExit.
29264 - We were telling the controller about CHECKING_REACHABILITY and
29265 REACHABILITY_FAILED status events whenever we launch a testing
29266 circuit or notice that one has failed. Instead, only tell the
29267 controller when we want to inform the user of overall success or
29268 overall failure. Bugfix on 0.1.2.6-alpha. Fixes bug 1075. Reported
29270 - Don't warn when we're using a circuit that ends with a node
29271 excluded in ExcludeExitNodes, but the circuit is not used to access
29272 the outside world. This should help fix bug 1090. Bugfix on
29274 - Work around a small memory leak in some versions of OpenSSL that
29275 stopped the memory used by the hostname TLS extension from being
29279 - Add a "getinfo status/accepted-server-descriptor" controller
29280 command, which is the recommended way for controllers to learn
29281 whether our server descriptor has been successfully received by at
29282 least on directory authority. Un-recommend good-server-descriptor
29283 getinfo and status events until we have a better design for them.
29286 Changes in version 0.2.2.5-alpha - 2009-10-11
29287 Tor 0.2.2.5-alpha fixes a few compile problems in 0.2.2.4-alpha.
29290 - Make the tarball compile again. Oops. Bugfix on 0.2.2.4-alpha.
29292 o Directory authorities:
29293 - Temporarily (just for this release) move dizum to an alternate
29297 Changes in version 0.2.2.4-alpha - 2009-10-10
29298 Tor 0.2.2.4-alpha fixes more crash bugs in 0.2.2.2-alpha. It also
29299 introduces a new unit test framework, shifts directry authority
29300 addresses around to reduce the impact from recent blocking events,
29301 and fixes a few smaller bugs.
29304 - Fix several more asserts in the circuit_build_times code, for
29305 example one that causes Tor to fail to start once we have
29306 accumulated 5000 build times in the state file. Bugfixes on
29307 0.2.2.2-alpha; fixes bug 1108.
29309 o New directory authorities:
29310 - Move moria1 and Tonga to alternate IP addresses.
29313 - Log SSL state transitions at debug level during handshake, and
29314 include SSL states in error messages. This may help debug future
29315 SSL handshake issues.
29316 - Add a new "Handshake" log domain for activities that happen
29317 during the TLS handshake.
29318 - Revert to the "June 3 2009" ip-to-country file. The September one
29319 seems to have removed most US IP addresses.
29320 - Directory authorities now reject Tor relays with versions less than
29321 0.1.2.14. This step cuts out four relays from the current network,
29322 none of which are very big.
29325 - Fix a couple of smaller issues with gathering statistics. Bugfixes
29327 - Fix two memory leaks in the error case of
29328 circuit_build_times_parse_state(). Bugfix on 0.2.2.2-alpha.
29329 - Don't count one-hop circuits when we're estimating how long it
29330 takes circuits to build on average. Otherwise we'll set our circuit
29331 build timeout lower than we should. Bugfix on 0.2.2.2-alpha.
29332 - Directory authorities no longer change their opinion of, or vote on,
29333 whether a router is Running, unless they have themselves been
29334 online long enough to have some idea. Bugfix on 0.2.0.6-alpha.
29337 o Code simplifications and refactoring:
29338 - Revise our unit tests to use the "tinytest" framework, so we
29339 can run tests in their own processes, have smarter setup/teardown
29340 code, and so on. The unit test code has moved to its own
29341 subdirectory, and has been split into multiple modules.
29344 Changes in version 0.2.2.3-alpha - 2009-09-23
29345 Tor 0.2.2.3-alpha fixes a few crash bugs in 0.2.2.2-alpha.
29348 - Fix an overzealous assert in our new circuit build timeout code.
29349 Bugfix on 0.2.2.2-alpha; fixes bug 1103.
29352 - If the networkstatus consensus tells us that we should use a
29353 negative circuit package window, ignore it. Otherwise we'll
29354 believe it and then trigger an assert. Bugfix on 0.2.2.2-alpha.
29357 Changes in version 0.2.2.2-alpha - 2009-09-21
29358 Tor 0.2.2.2-alpha introduces our latest performance improvement for
29359 clients: Tor tracks the average time it takes to build a circuit, and
29360 avoids using circuits that take too long to build. For fast connections,
29361 this feature can cut your expected latency in half. For slow or flaky
29362 connections, it could ruin your Tor experience. Let us know if it does!
29365 - Tor now tracks how long it takes to build client-side circuits
29366 over time, and adapts its timeout to local network performance.
29367 Since a circuit that takes a long time to build will also provide
29368 bad performance, we get significant latency improvements by
29369 discarding the slowest 20% of circuits. Specifically, Tor creates
29370 circuits more aggressively than usual until it has enough data
29371 points for a good timeout estimate. Implements proposal 151.
29372 We are especially looking for reports (good and bad) from users with
29373 both EDGE and broadband connections that can move from broadband
29374 to EDGE and find out if the build-time data in the .tor/state gets
29375 reset without loss of Tor usability. You should also see a notice
29376 log message telling you that Tor has reset its timeout.
29377 - Directory authorities can now vote on arbitrary integer values as
29378 part of the consensus process. This is designed to help set
29379 network-wide parameters. Implements proposal 167.
29380 - Tor now reads the "circwindow" parameter out of the consensus,
29381 and uses that value for its circuit package window rather than the
29382 default of 1000 cells. Begins the implementation of proposal 168.
29385 - Fix a remotely triggerable memory leak when a consensus document
29386 contains more than one signature from the same voter. Bugfix on
29390 - Fix an extremely rare infinite recursion bug that could occur if
29391 we tried to log a message after shutting down the log subsystem.
29392 Found by Matt Edman. Bugfix on 0.2.0.16-alpha.
29393 - Fix parsing for memory or time units given without a space between
29394 the number and the unit. Bugfix on 0.2.2.1-alpha; fixes bug 1076.
29395 - A networkstatus vote must contain exactly one signature. Spec
29396 conformance issue. Bugfix on 0.2.0.3-alpha.
29397 - Fix an obscure bug where hidden services on 64-bit big-endian
29398 systems might mis-read the timestamp in v3 introduce cells, and
29399 refuse to connect back to the client. Discovered by "rotor".
29400 Bugfix on 0.2.1.6-alpha.
29401 - We were triggering a CLOCK_SKEW controller status event whenever
29402 we connect via the v2 connection protocol to any relay that has
29403 a wrong clock. Instead, we should only inform the controller when
29404 it's a trusted authority that claims our clock is wrong. Bugfix
29405 on 0.2.0.20-rc; starts to fix bug 1074. Reported by SwissTorExit.
29406 - We were telling the controller about CHECKING_REACHABILITY and
29407 REACHABILITY_FAILED status events whenever we launch a testing
29408 circuit or notice that one has failed. Instead, only tell the
29409 controller when we want to inform the user of overall success or
29410 overall failure. Bugfix on 0.1.2.6-alpha. Fixes bug 1075. Reported
29412 - Don't warn when we're using a circuit that ends with a node
29413 excluded in ExcludeExitNodes, but the circuit is not used to access
29414 the outside world. This should help fix bug 1090, but more problems
29415 remain. Bugfix on 0.2.1.6-alpha.
29416 - Work around a small memory leak in some versions of OpenSSL that
29417 stopped the memory used by the hostname TLS extension from being
29419 - Make our 'torify' script more portable; if we have only one of
29420 'torsocks' or 'tsocks' installed, don't complain to the user;
29421 and explain our warning about tsocks better.
29424 - Add a "getinfo status/accepted-server-descriptor" controller
29425 command, which is the recommended way for controllers to learn
29426 whether our server descriptor has been successfully received by at
29427 least on directory authority. Un-recommend good-server-descriptor
29428 getinfo and status events until we have a better design for them.
29429 - Update to the "September 4 2009" ip-to-country file.
29432 Changes in version 0.2.2.1-alpha - 2009-08-26
29433 Tor 0.2.2.1-alpha disables ".exit" address notation by default, allows
29434 Tor clients to bootstrap on networks where only port 80 is reachable,
29435 makes it more straightforward to support hardware crypto accelerators,
29436 and starts the groundwork for gathering stats safely at relays.
29439 - Start the process of disabling ".exit" address notation, since it
29440 can be used for a variety of esoteric application-level attacks
29441 on users. To reenable it, set "AllowDotExit 1" in your torrc. Fix
29444 o New directory authorities:
29445 - Set up urras (run by Jacob Appelbaum) as the seventh v3 directory
29449 - New AccelName and AccelDir options add support for dynamic OpenSSL
29450 hardware crypto acceleration engines.
29451 - Tor now supports tunneling all of its outgoing connections over
29452 a SOCKS proxy, using the SOCKS4Proxy and/or SOCKS5Proxy
29453 configuration options. Code by Christopher Davis.
29456 - Send circuit or stream sendme cells when our window has decreased
29457 by 100 cells, not when it has decreased by 101 cells. Bug uncovered
29458 by Karsten when testing the "reduce circuit window" performance
29459 patch. Bugfix on the 54th commit on Tor -- from July 2002,
29460 before the release of Tor 0.0.0. This is the new winner of the
29463 o New options for gathering stats safely:
29464 - Directory mirrors that set "DirReqStatistics 1" write statistics
29465 about directory requests to disk every 24 hours. As compared to the
29466 --enable-geoip-stats flag in 0.2.1.x, there are a few improvements:
29467 1) stats are written to disk exactly every 24 hours; 2) estimated
29468 shares of v2 and v3 requests are determined as mean values, not at
29469 the end of a measurement period; 3) unresolved requests are listed
29470 with country code '??'; 4) directories also measure download times.
29471 - Exit nodes that set "ExitPortStatistics 1" write statistics on the
29472 number of exit streams and transferred bytes per port to disk every
29474 - Relays that set "CellStatistics 1" write statistics on how long
29475 cells spend in their circuit queues to disk every 24 hours.
29476 - Entry nodes that set "EntryStatistics 1" write statistics on the
29477 rough number and origins of connecting clients to disk every 24
29479 - Relays that write any of the above statistics to disk and set
29480 "ExtraInfoStatistics 1" include the past 24 hours of statistics in
29481 their extra-info documents.
29484 - New --digests command-line switch to output the digests of the
29485 source files Tor was built with.
29486 - The "torify" script now uses torsocks where available.
29487 - The memarea code now uses a sentinel value at the end of each area
29488 to make sure nothing writes beyond the end of an area. This might
29489 help debug some conceivable causes of bug 930.
29490 - Time and memory units in the configuration file can now be set to
29491 fractional units. For example, "2.5 GB" is now a valid value for
29493 - Certain Tor clients (such as those behind check.torproject.org) may
29494 want to fetch the consensus in an extra early manner. To enable this
29495 a user may now set FetchDirInfoExtraEarly to 1. This also depends on
29496 setting FetchDirInfoEarly to 1. Previous behavior will stay the same
29497 as only certain clients who must have this information sooner should
29499 - Instead of adding the svn revision to the Tor version string, report
29500 the git commit (when we're building from a git checkout).
29503 - If any of the v3 certs we download are unparseable, we should
29504 actually notice the failure so we don't retry indefinitely. Bugfix
29505 on 0.2.0.x; reported by "rotator".
29506 - If the cached cert file is unparseable, warn but don't exit.
29507 - Fix possible segmentation fault on directory authorities. Bugfix on
29509 - When Tor fails to parse a descriptor of any kind, dump it to disk.
29510 Might help diagnosing bug 1051.
29512 o Deprecated and removed features:
29513 - The controller no longer accepts the old obsolete "addr-mappings/"
29514 or "unregistered-servers-" GETINFO values.
29515 - Hidden services no longer publish version 0 descriptors, and clients
29516 do not request or use version 0 descriptors. However, the old hidden
29517 service authorities still accept and serve version 0 descriptors
29518 when contacted by older hidden services/clients.
29519 - The EXTENDED_EVENTS and VERBOSE_NAMES controller features are now
29520 always on; using them is necessary for correct forward-compatible
29522 - Remove support for .noconnect style addresses. Nobody was using
29523 them, and they provided another avenue for detecting Tor users
29524 via application-level web tricks.
29526 o Packaging changes:
29527 - Upgrade Vidalia from 0.1.15 to 0.2.3 in the Windows and OS X
29528 installer bundles. See
29529 https://trac.vidalia-project.net/browser/vidalia/tags/vidalia-0.2.3/CHANGELOG
29530 for details of what's new in Vidalia 0.2.3.
29531 - Windows Vidalia Bundle: update Privoxy from 3.0.6 to 3.0.14-beta.
29532 - OS X Vidalia Bundle: move to Polipo 1.0.4 with Tor specific
29533 configuration file, rather than the old Privoxy.
29534 - OS X Vidalia Bundle: Vidalia, Tor, and Polipo are compiled as
29535 x86-only for better compatibility with OS X 10.6, aka Snow Leopard.
29536 - OS X Tor Expert Bundle: Tor is compiled as x86-only for
29537 better compatibility with OS X 10.6, aka Snow Leopard.
29538 - OS X Vidalia Bundle: The multi-package installer is now replaced
29539 by a simple drag and drop to the /Applications folder. This change
29540 occurred with the upgrade to Vidalia 0.2.3.
29543 Changes in version 0.2.1.19 - 2009-07-28
29544 Tor 0.2.1.19 fixes a major bug with accessing and providing hidden
29545 services on Tor 0.2.1.3-alpha through 0.2.1.18.
29548 - Make accessing hidden services on 0.2.1.x work right again.
29549 Bugfix on 0.2.1.3-alpha; workaround for bug 1038. Diagnosis and
29550 part of patch provided by "optimist".
29553 - When a relay/bridge is writing out its identity key fingerprint to
29554 the "fingerprint" file and to its logs, write it without spaces. Now
29555 it will look like the fingerprints in our bridges documentation,
29556 and confuse fewer users.
29559 - Relays no longer publish a new server descriptor if they change
29560 their MaxAdvertisedBandwidth config option but it doesn't end up
29561 changing their advertised bandwidth numbers. Bugfix on 0.2.0.28-rc;
29562 fixes bug 1026. Patch from Sebastian.
29563 - Avoid leaking memory every time we get a create cell but we have
29564 so many already queued that we refuse it. Bugfix on 0.2.0.19-alpha;
29565 fixes bug 1034. Reported by BarkerJr.
29568 Changes in version 0.2.1.18 - 2009-07-24
29569 Tor 0.2.1.18 lays the foundations for performance improvements,
29570 adds status events to help users diagnose bootstrap problems, adds
29571 optional authentication/authorization for hidden services, fixes a
29572 variety of potential anonymity problems, and includes a huge pile of
29573 other features and bug fixes.
29576 - Add LIBS=-lrt to Makefile.am so the Tor RPMs use a static libevent.
29579 Changes in version 0.2.1.17-rc - 2009-07-07
29580 Tor 0.2.1.17-rc marks the fourth -- and hopefully last -- release
29581 candidate for the 0.2.1.x series. It lays the groundwork for further
29582 client performance improvements, and also fixes a big bug with directory
29583 authorities that were causing them to assign Guard and Stable flags
29586 The Windows bundles also finally include the geoip database that we
29587 thought we'd been shipping since 0.2.0.x (oops), and the OS X bundles
29588 should actually install Torbutton rather than giving you a cryptic
29589 failure message (oops).
29592 - Clients now use the bandwidth values in the consensus, rather than
29593 the bandwidth values in each relay descriptor. This approach opens
29594 the door to more accurate bandwidth estimates once the directory
29595 authorities start doing active measurements. Implements more of
29599 - When Tor clients restart after 1-5 days, they discard all their
29600 cached descriptors as too old, but they still use the cached
29601 consensus document. This approach is good for robustness, but
29602 bad for performance: since they don't know any bandwidths, they
29603 end up choosing at random rather than weighting their choice by
29604 speed. Fixed by the above feature of putting bandwidths in the
29605 consensus. Bugfix on 0.2.0.x.
29606 - Directory authorities were neglecting to mark relays down in their
29607 internal histories if the relays fall off the routerlist without
29608 ever being found unreachable. So there were relays in the histories
29609 that haven't been seen for eight months, and are listed as being
29610 up for eight months. This wreaked havoc on the "median wfu"
29611 and "median mtbf" calculations, in turn making Guard and Stable
29612 flags very wrong, hurting network performance. Fixes bugs 696 and
29613 969. Bugfix on 0.2.0.6-alpha.
29616 - Serve the DirPortFrontPage page even when we have been approaching
29617 our quotas recently. Fixes bug 1013; bugfix on 0.2.1.8-alpha.
29618 - The control port would close the connection before flushing long
29619 replies, such as the network consensus, if a QUIT command was issued
29620 before the reply had completed. Now, the control port flushes all
29621 pending replies before closing the connection. Also fixed a spurious
29622 warning when a QUIT command is issued after a malformed or rejected
29623 AUTHENTICATE command, but before the connection was closed. Patch
29624 by Marcus Griep. Bugfix on 0.2.0.x; fixes bugs 1015 and 1016.
29625 - When we can't find an intro key for a v2 hidden service descriptor,
29626 fall back to the v0 hidden service descriptor and log a bug message.
29627 Workaround for bug 1024.
29628 - Fix a log message that did not respect the SafeLogging option.
29632 - If we're a relay and we change our IP address, be more verbose
29633 about the reason that made us change. Should help track down
29634 further bugs for relays on dynamic IP addresses.
29637 Changes in version 0.2.0.35 - 2009-06-24
29639 - Avoid crashing in the presence of certain malformed descriptors.
29640 Found by lark, and by automated fuzzing.
29641 - Fix an edge case where a malicious exit relay could convince a
29642 controller that the client's DNS question resolves to an internal IP
29643 address. Bug found and fixed by "optimist"; bugfix on 0.1.2.8-beta.
29646 - Finally fix the bug where dynamic-IP relays disappear when their
29647 IP address changes: directory mirrors were mistakenly telling
29648 them their old address if they asked via begin_dir, so they
29649 never got an accurate answer about their new address, so they
29650 just vanished after a day. For belt-and-suspenders, relays that
29651 don't set Address in their config now avoid using begin_dir for
29652 all direct connections. Should fix bugs 827, 883, and 900.
29653 - Fix a timing-dependent, allocator-dependent, DNS-related crash bug
29654 that would occur on some exit nodes when DNS failures and timeouts
29655 occurred in certain patterns. Fix for bug 957.
29658 - When starting with a cache over a few days old, do not leak
29659 memory for the obsolete router descriptors in it. Bugfix on
29660 0.2.0.33; fixes bug 672.
29661 - Hidden service clients didn't use a cached service descriptor that
29662 was older than 15 minutes, but wouldn't fetch a new one either,
29663 because there was already one in the cache. Now, fetch a v2
29664 descriptor unless the same descriptor was added to the cache within
29665 the last 15 minutes. Fixes bug 997; reported by Marcus Griep.
29668 Changes in version 0.2.1.16-rc - 2009-06-20
29669 Tor 0.2.1.16-rc speeds up performance for fast exit relays, and fixes
29670 a bunch of minor bugs.
29673 - Fix an edge case where a malicious exit relay could convince a
29674 controller that the client's DNS question resolves to an internal IP
29675 address. Bug found and fixed by "optimist"; bugfix on 0.1.2.8-beta.
29677 o Major performance improvements (on 0.2.0.x):
29678 - Disable and refactor some debugging checks that forced a linear scan
29679 over the whole server-side DNS cache. These accounted for over 50%
29680 of CPU time on a relatively busy exit node's gprof profile. Found
29682 - Disable some debugging checks that appeared in exit node profile
29686 - Update to the "June 3 2009" ip-to-country file.
29687 - Do not have tor-resolve automatically refuse all .onion addresses;
29688 if AutomapHostsOnResolve is set in your torrc, this will work fine.
29690 o Minor bugfixes (on 0.2.0.x):
29691 - Log correct error messages for DNS-related network errors on
29693 - Fix a race condition that could cause crashes or memory corruption
29694 when running as a server with a controller listening for log
29696 - Avoid crashing when we have a policy specified in a DirPolicy or
29697 SocksPolicy or ReachableAddresses option with ports set on it,
29698 and we re-load the policy. May fix bug 996.
29699 - Hidden service clients didn't use a cached service descriptor that
29700 was older than 15 minutes, but wouldn't fetch a new one either,
29701 because there was already one in the cache. Now, fetch a v2
29702 descriptor unless the same descriptor was added to the cache within
29703 the last 15 minutes. Fixes bug 997; reported by Marcus Griep.
29705 o Minor bugfixes (on 0.2.1.x):
29706 - Don't warn users about low port and hibernation mix when they
29707 provide a *ListenAddress directive to fix that. Bugfix on
29709 - When switching back and forth between bridge mode, do not start
29710 gathering GeoIP data until two hours have passed.
29711 - Do not complain that the user has requested an excluded node as
29712 an exit when the node is not really an exit. This could happen
29713 because the circuit was for testing, or an introduction point.
29717 Changes in version 0.2.1.15-rc - 2009-05-25
29718 Tor 0.2.1.15-rc marks the second release candidate for the 0.2.1.x
29719 series. It fixes a major bug on fast exit relays, as well as a variety
29720 of more minor bugs.
29722 o Major bugfixes (on 0.2.0.x):
29723 - Fix a timing-dependent, allocator-dependent, DNS-related crash bug
29724 that would occur on some exit nodes when DNS failures and timeouts
29725 occurred in certain patterns. Fix for bug 957.
29727 o Minor bugfixes (on 0.2.0.x):
29728 - Actually return -1 in the error case for read_bandwidth_usage().
29729 Harmless bug, since we currently don't care about the return value
29730 anywhere. Bugfix on 0.2.0.9-alpha.
29731 - Provide a more useful log message if bug 977 (related to buffer
29732 freelists) ever reappears, and do not crash right away.
29733 - Fix an assertion failure on 64-bit platforms when we allocated
29734 memory right up to the end of a memarea, then realigned the memory
29735 one step beyond the end. Fixes a possible cause of bug 930.
29736 - Protect the count of open sockets with a mutex, so we can't
29737 corrupt it when two threads are closing or opening sockets at once.
29738 Fix for bug 939. Bugfix on 0.2.0.1-alpha.
29739 - Don't allow a bridge to publish its router descriptor to a
29740 non-bridge directory authority. Fixes part of bug 932.
29741 - When we change to or from being a bridge, reset our counts of
29742 client usage by country. Fixes bug 932.
29743 - Fix a bug that made stream bandwidth get misreported to the
29745 - Stop using malloc_usable_size() to use more area than we had
29746 actually allocated: it was safe, but made valgrind really unhappy.
29747 - Fix a memory leak when v3 directory authorities load their keys
29748 and cert from disk. Bugfix on 0.2.0.1-alpha.
29750 o Minor bugfixes (on 0.2.1.x):
29751 - Fix use of freed memory when deciding to mark a non-addable
29752 descriptor as never-downloadable. Bugfix on 0.2.1.9-alpha.
29755 Changes in version 0.2.1.14-rc - 2009-04-12
29756 Tor 0.2.1.14-rc marks the first release candidate for the 0.2.1.x
29757 series. It begins fixing some major performance problems, and also
29758 finally addresses the bug that was causing relays on dynamic IP
29759 addresses to fall out of the directory.
29762 - Clients replace entry guards that were chosen more than a few months
29763 ago. This change should significantly improve client performance,
29764 especially once more people upgrade, since relays that have been
29765 a guard for a long time are currently overloaded.
29767 o Major bugfixes (on 0.2.0):
29768 - Finally fix the bug where dynamic-IP relays disappear when their
29769 IP address changes: directory mirrors were mistakenly telling
29770 them their old address if they asked via begin_dir, so they
29771 never got an accurate answer about their new address, so they
29772 just vanished after a day. For belt-and-suspenders, relays that
29773 don't set Address in their config now avoid using begin_dir for
29774 all direct connections. Should fix bugs 827, 883, and 900.
29775 - Relays were falling out of the networkstatus consensus for
29776 part of a day if they changed their local config but the
29777 authorities discarded their new descriptor as "not sufficiently
29778 different". Now directory authorities accept a descriptor as changed
29779 if bandwidthrate or bandwidthburst changed. Partial fix for bug 962;
29780 patch by Sebastian.
29781 - Avoid crashing in the presence of certain malformed descriptors.
29782 Found by lark, and by automated fuzzing.
29785 - When generating circuit events with verbose nicknames for
29786 controllers, try harder to look up nicknames for routers on a
29787 circuit. (Previously, we would look in the router descriptors we had
29788 for nicknames, but not in the consensus.) Partial fix for bug 941.
29789 - If the bridge config line doesn't specify a port, assume 443.
29790 This makes bridge lines a bit smaller and easier for users to
29792 - Raise the minimum bandwidth to be a relay from 20000 bytes to 20480
29793 bytes (aka 20KB/s), to match our documentation. Also update
29794 directory authorities so they always assign the Fast flag to relays
29795 with 20KB/s of capacity. Now people running relays won't suddenly
29796 find themselves not seeing any use, if the network gets faster
29798 - Update to the "April 3 2009" ip-to-country file.
29801 - Avoid trying to print raw memory to the logs when we decide to
29802 give up on downloading a given relay descriptor. Bugfix on
29804 - In tor-resolve, when the Tor client to use is specified by
29805 <hostname>:<port>, actually use the specified port rather than
29806 defaulting to 9050. Bugfix on 0.2.1.6-alpha.
29807 - Make directory usage recording work again. Bugfix on 0.2.1.6-alpha.
29808 - When starting with a cache over a few days old, do not leak
29809 memory for the obsolete router descriptors in it. Bugfix on
29811 - Avoid double-free on list of successfully uploaded hidden
29812 service discriptors. Fix for bug 948. Bugfix on 0.2.1.6-alpha.
29813 - Change memarea_strndup() implementation to work even when
29814 duplicating a string at the end of a page. This bug was
29815 harmless for now, but could have meant crashes later. Fix by
29816 lark. Bugfix on 0.2.1.1-alpha.
29817 - Limit uploaded directory documents to be 16M rather than 500K.
29818 The directory authorities were refusing v3 consensus votes from
29819 other authorities, since the votes are now 504K. Fixes bug 959;
29820 bugfix on 0.0.2pre17 (where we raised it from 50K to 500K ;).
29821 - Directory authorities should never send a 503 "busy" response to
29822 requests for votes or keys. Bugfix on 0.2.0.8-alpha; exposed by
29826 Changes in version 0.2.1.13-alpha - 2009-03-09
29827 Tor 0.2.1.13-alpha includes another big pile of minor bugfixes and
29828 cleanups. We're finally getting close to a release candidate.
29831 - Correctly update the list of which countries we exclude as
29832 exits, when the GeoIP file is loaded or reloaded. Diagnosed by
29833 lark. Bugfix on 0.2.1.6-alpha.
29835 o Minor bugfixes (on 0.2.0.x and earlier):
29836 - Automatically detect MacOSX versions earlier than 10.4.0, and
29837 disable kqueue from inside Tor when running with these versions.
29838 We previously did this from the startup script, but that was no
29839 help to people who didn't use the startup script. Resolves bug 863.
29840 - When we had picked an exit node for a connection, but marked it as
29841 "optional", and it turned out we had no onion key for the exit,
29842 stop wanting that exit and try again. This situation may not
29843 be possible now, but will probably become feasible with proposal
29844 158. Spotted by rovv. Fixes another case of bug 752.
29845 - Clients no longer cache certificates for authorities they do not
29846 recognize. Bugfix on 0.2.0.9-alpha.
29847 - When we can't transmit a DNS request due to a network error, retry
29848 it after a while, and eventually transmit a failing response to
29849 the RESOLVED cell. Bugfix on 0.1.2.5-alpha.
29850 - If the controller claimed responsibility for a stream, but that
29851 stream never finished making its connection, it would live
29852 forever in circuit_wait state. Now we close it after SocksTimeout
29853 seconds. Bugfix on 0.1.2.7-alpha; reported by Mike Perry.
29854 - Drop begin cells to a hidden service if they come from the middle
29855 of a circuit. Patch from lark.
29856 - When we erroneously receive two EXTEND cells for the same circuit
29857 ID on the same connection, drop the second. Patch from lark.
29858 - Fix a crash that occurs on exit nodes when a nameserver request
29859 timed out. Bugfix on 0.1.2.1-alpha; our CLEAR debugging code had
29860 been suppressing the bug since 0.1.2.10-alpha. Partial fix for
29862 - Do not assume that a stack-allocated character array will be
29863 64-bit aligned on platforms that demand that uint64_t access is
29864 aligned. Possible fix for bug 604.
29865 - Parse dates and IPv4 addresses in a locale- and libc-independent
29866 manner, to avoid platform-dependent behavior on malformed input.
29867 - Build correctly when configured to build outside the main source
29868 path. Patch from Michael Gold.
29869 - We were already rejecting relay begin cells with destination port
29870 of 0. Now also reject extend cells with destination port or address
29871 of 0. Suggested by lark.
29873 o Minor bugfixes (on 0.2.1.x):
29874 - Don't re-extend introduction circuits if we ran out of RELAY_EARLY
29875 cells. Bugfix on 0.2.1.3-alpha. Fixes more of bug 878.
29876 - If we're an exit node, scrub the IP address to which we are exiting
29877 in the logs. Bugfix on 0.2.1.8-alpha.
29880 - On Linux, use the prctl call to re-enable core dumps when the user
29882 - New controller event NEWCONSENSUS that lists the networkstatus
29883 lines for every recommended relay. Now controllers like Torflow
29884 can keep up-to-date on which relays they should be using.
29885 - Update to the "February 26 2009" ip-to-country file.
29888 Changes in version 0.2.0.34 - 2009-02-08
29889 Tor 0.2.0.34 features several more security-related fixes. You should
29890 upgrade, especially if you run an exit relay (remote crash) or a
29891 directory authority (remote infinite loop), or you're on an older
29892 (pre-XP) or not-recently-patched Windows (remote exploit).
29894 This release marks end-of-life for Tor 0.1.2.x. Those Tor versions
29895 have many known flaws, and nobody should be using them. You should
29896 upgrade. If you're using a Linux or BSD and its packages are obsolete,
29897 stop using those packages and upgrade anyway.
29900 - Fix an infinite-loop bug on handling corrupt votes under certain
29901 circumstances. Bugfix on 0.2.0.8-alpha.
29902 - Fix a temporary DoS vulnerability that could be performed by
29903 a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark.
29904 - Avoid a potential crash on exit nodes when processing malformed
29905 input. Remote DoS opportunity. Bugfix on 0.2.0.33.
29906 - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid.
29907 Spec conformance issue. Bugfix on Tor 0.0.2pre27.
29910 - Fix compilation on systems where time_t is a 64-bit integer.
29911 Patch from Matthias Drochner.
29912 - Don't consider expiring already-closed client connections. Fixes
29913 bug 893. Bugfix on 0.0.2pre20.
29916 Changes in version 0.2.1.12-alpha - 2009-02-08
29917 Tor 0.2.1.12-alpha features several more security-related fixes. You
29918 should upgrade, especially if you run an exit relay (remote crash) or
29919 a directory authority (remote infinite loop), or you're on an older
29920 (pre-XP) or not-recently-patched Windows (remote exploit). It also
29921 includes a big pile of minor bugfixes and cleanups.
29924 - Fix an infinite-loop bug on handling corrupt votes under certain
29925 circumstances. Bugfix on 0.2.0.8-alpha.
29926 - Fix a temporary DoS vulnerability that could be performed by
29927 a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark.
29928 - Avoid a potential crash on exit nodes when processing malformed
29929 input. Remote DoS opportunity. Bugfix on 0.2.1.7-alpha.
29932 - Let controllers actually ask for the "clients_seen" event for
29933 getting usage summaries on bridge relays. Bugfix on 0.2.1.10-alpha;
29934 reported by Matt Edman.
29935 - Fix a compile warning on OSX Panther. Fixes bug 913; bugfix against
29937 - Fix a bug in address parsing that was preventing bridges or hidden
29938 service targets from being at IPv6 addresses.
29939 - Solve a bug that kept hardware crypto acceleration from getting
29940 enabled when accounting was turned on. Fixes bug 907. Bugfix on
29942 - Remove a bash-ism from configure.in to build properly on non-Linux
29943 platforms. Bugfix on 0.2.1.1-alpha.
29944 - Fix code so authorities _actually_ send back X-Descriptor-Not-New
29945 headers. Bugfix on 0.2.0.10-alpha.
29946 - Don't consider expiring already-closed client connections. Fixes
29947 bug 893. Bugfix on 0.0.2pre20.
29948 - Fix another interesting corner-case of bug 891 spotted by rovv:
29949 Previously, if two hosts had different amounts of clock drift, and
29950 one of them created a new connection with just the wrong timing,
29951 the other might decide to deprecate the new connection erroneously.
29952 Bugfix on 0.1.1.13-alpha.
29953 - Resolve a very rare crash bug that could occur when the user forced
29954 a nameserver reconfiguration during the middle of a nameserver
29955 probe. Fixes bug 526. Bugfix on 0.1.2.1-alpha.
29956 - Support changing value of ServerDNSRandomizeCase during SIGHUP.
29957 Bugfix on 0.2.1.7-alpha.
29958 - If we're using bridges and our network goes away, be more willing
29959 to forgive our bridges and try again when we get an application
29960 request. Bugfix on 0.2.0.x.
29963 - Support platforms where time_t is 64 bits long. (Congratulations,
29964 NetBSD!) Patch from Matthias Drochner.
29965 - Add a 'getinfo status/clients-seen' controller command, in case
29966 controllers want to hear clients_seen events but connect late.
29969 - Disable GCC's strict alias optimization by default, to avoid the
29970 likelihood of its introducing subtle bugs whenever our code violates
29971 the letter of C99's alias rules.
29974 Changes in version 0.2.0.33 - 2009-01-21
29975 Tor 0.2.0.33 fixes a variety of bugs that were making relays less
29976 useful to users. It also finally fixes a bug where a relay or client
29977 that's been off for many days would take a long time to bootstrap.
29979 This update also fixes an important security-related bug reported by
29980 Ilja van Sprundel. You should upgrade. (We'll send out more details
29981 about the bug once people have had some time to upgrade.)
29984 - Fix a heap-corruption bug that may be remotely triggerable on
29985 some platforms. Reported by Ilja van Sprundel.
29988 - When a stream at an exit relay is in state "resolving" or
29989 "connecting" and it receives an "end" relay cell, the exit relay
29990 would silently ignore the end cell and not close the stream. If
29991 the client never closes the circuit, then the exit relay never
29992 closes the TCP connection. Bug introduced in Tor 0.1.2.1-alpha;
29993 reported by "wood".
29994 - When sending CREATED cells back for a given circuit, use a 64-bit
29995 connection ID to find the right connection, rather than an addr:port
29996 combination. Now that we can have multiple OR connections between
29997 the same ORs, it is no longer possible to use addr:port to uniquely
29998 identify a connection.
29999 - Bridge relays that had DirPort set to 0 would stop fetching
30000 descriptors shortly after startup, and then briefly resume
30001 after a new bandwidth test and/or after publishing a new bridge
30002 descriptor. Bridge users that try to bootstrap from them would
30003 get a recent networkstatus but would get descriptors from up to
30004 18 hours earlier, meaning most of the descriptors were obsolete
30005 already. Reported by Tas; bugfix on 0.2.0.13-alpha.
30006 - Prevent bridge relays from serving their 'extrainfo' document
30007 to anybody who asks, now that extrainfo docs include potentially
30008 sensitive aggregated client geoip summaries. Bugfix on
30010 - If the cached networkstatus consensus is more than five days old,
30011 discard it rather than trying to use it. In theory it could be
30012 useful because it lists alternate directory mirrors, but in practice
30013 it just means we spend many minutes trying directory mirrors that
30014 are long gone from the network. Also discard router descriptors as
30015 we load them if they are more than five days old, since the onion
30016 key is probably wrong by now. Bugfix on 0.2.0.x. Fixes bug 887.
30019 - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
30020 could make gcc generate non-functional binary search code. Bugfix
30022 - Build correctly on platforms without socklen_t.
30023 - Compile without warnings on solaris.
30024 - Avoid potential crash on internal error during signature collection.
30025 Fixes bug 864. Patch from rovv.
30026 - Correct handling of possible malformed authority signing key
30027 certificates with internal signature types. Fixes bug 880.
30028 Bugfix on 0.2.0.3-alpha.
30029 - Fix a hard-to-trigger resource leak when logging credential status.
30031 - When we can't initialize DNS because the network is down, do not
30032 automatically stop Tor from starting. Instead, we retry failed
30033 dns_init() every 10 minutes, and change the exit policy to reject
30034 *:* until one succeeds. Fixes bug 691.
30035 - Use 64 bits instead of 32 bits for connection identifiers used with
30036 the controller protocol, to greatly reduce risk of identifier reuse.
30037 - When we're choosing an exit node for a circuit, and we have
30038 no pending streams, choose a good general exit rather than one that
30039 supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
30040 - Fix another case of assuming, when a specific exit is requested,
30041 that we know more than the user about what hosts it allows.
30042 Fixes one case of bug 752. Patch from rovv.
30043 - Clip the MaxCircuitDirtiness config option to a minimum of 10
30044 seconds. Warn the user if lower values are given in the
30045 configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
30046 - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
30047 user if lower values are given in the configuration. Bugfix on
30048 0.1.1.17-rc. Patch by Sebastian.
30049 - Fix a memory leak when we decline to add a v2 rendezvous descriptor to
30050 the cache because we already had a v0 descriptor with the same ID.
30051 Bugfix on 0.2.0.18-alpha.
30052 - Fix a race condition when freeing keys shared between main thread
30053 and CPU workers that could result in a memory leak. Bugfix on
30054 0.1.0.1-rc. Fixes bug 889.
30055 - Send a valid END cell back when a client tries to connect to a
30056 nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
30057 840. Patch from rovv.
30058 - Check which hops rendezvous stream cells are associated with to
30059 prevent possible guess-the-streamid injection attacks from
30060 intermediate hops. Fixes another case of bug 446. Based on patch
30062 - If a broken client asks a non-exit router to connect somewhere,
30063 do not even do the DNS lookup before rejecting the connection.
30064 Fixes another case of bug 619. Patch from rovv.
30065 - When a relay gets a create cell it can't decrypt (e.g. because it's
30066 using the wrong onion key), we were dropping it and letting the
30067 client time out. Now actually answer with a destroy cell. Fixes
30068 bug 904. Bugfix on 0.0.2pre8.
30070 o Minor bugfixes (hidden services):
30071 - Do not throw away existing introduction points on SIGHUP. Bugfix on
30072 0.0.6pre1. Patch by Karsten. Fixes bug 874.
30075 - Report the case where all signatures in a detached set are rejected
30076 differently than the case where there is an error handling the
30078 - When we realize that another process has modified our cached
30079 descriptors, print out a more useful error message rather than
30080 triggering an assertion. Fixes bug 885. Patch from Karsten.
30081 - Implement the 0x20 hack to better resist DNS poisoning: set the
30082 case on outgoing DNS requests randomly, and reject responses that do
30083 not match the case correctly. This logic can be disabled with the
30084 ServerDNSRandomizeCase setting, if you are using one of the 0.3%
30085 of servers that do not reliably preserve case in replies. See
30086 "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
30088 - Check DNS replies for more matching fields to better resist DNS
30090 - Never use OpenSSL compression: it wastes RAM and CPU trying to
30091 compress cells, which are basically all encrypted, compressed, or
30095 Changes in version 0.2.1.11-alpha - 2009-01-20
30096 Tor 0.2.1.11-alpha finishes fixing the "if your Tor is off for a
30097 week it will take a long time to bootstrap again" bug. It also fixes
30098 an important security-related bug reported by Ilja van Sprundel. You
30099 should upgrade. (We'll send out more details about the bug once people
30100 have had some time to upgrade.)
30103 - Fix a heap-corruption bug that may be remotely triggerable on
30104 some platforms. Reported by Ilja van Sprundel.
30107 - Discard router descriptors as we load them if they are more than
30108 five days old. Otherwise if Tor is off for a long time and then
30109 starts with cached descriptors, it will try to use the onion
30110 keys in those obsolete descriptors when building circuits. Bugfix
30111 on 0.2.0.x. Fixes bug 887.
30114 - Try to make sure that the version of Libevent we're running with
30115 is binary-compatible with the one we built with. May address bug
30117 - Make setting ServerDNSRandomizeCase to 0 actually work. Bugfix
30118 for bug 905. Bugfix on 0.2.1.7-alpha.
30119 - Add a new --enable-local-appdata configuration switch to change
30120 the default location of the datadir on win32 from APPDATA to
30121 LOCAL_APPDATA. In the future, we should migrate to LOCAL_APPDATA
30122 entirely. Patch from coderman.
30125 - Make outbound DNS packets respect the OutboundBindAddress setting.
30126 Fixes the bug part of bug 798. Bugfix on 0.1.2.2-alpha.
30127 - When our circuit fails at the first hop (e.g. we get a destroy
30128 cell back), avoid using that OR connection anymore, and also
30129 tell all the one-hop directory requests waiting for it that they
30130 should fail. Bugfix on 0.2.1.3-alpha.
30131 - In the torify(1) manpage, mention that tsocks will leak your
30135 Changes in version 0.2.1.10-alpha - 2009-01-06
30136 Tor 0.2.1.10-alpha fixes two major bugs in bridge relays (one that
30137 would make the bridge relay not so useful if it had DirPort set to 0,
30138 and one that could let an attacker learn a little bit of information
30139 about the bridge's users), and a bug that would cause your Tor relay
30140 to ignore a circuit create request it can't decrypt (rather than reply
30141 with an error). It also fixes a wide variety of other bugs.
30144 - If the cached networkstatus consensus is more than five days old,
30145 discard it rather than trying to use it. In theory it could
30146 be useful because it lists alternate directory mirrors, but in
30147 practice it just means we spend many minutes trying directory
30148 mirrors that are long gone from the network. Helps bug 887 a bit;
30150 - Bridge relays that had DirPort set to 0 would stop fetching
30151 descriptors shortly after startup, and then briefly resume
30152 after a new bandwidth test and/or after publishing a new bridge
30153 descriptor. Bridge users that try to bootstrap from them would
30154 get a recent networkstatus but would get descriptors from up to
30155 18 hours earlier, meaning most of the descriptors were obsolete
30156 already. Reported by Tas; bugfix on 0.2.0.13-alpha.
30157 - Prevent bridge relays from serving their 'extrainfo' document
30158 to anybody who asks, now that extrainfo docs include potentially
30159 sensitive aggregated client geoip summaries. Bugfix on
30163 - New controller event "clients_seen" to report a geoip-based summary
30164 of which countries we've seen clients from recently. Now controllers
30165 like Vidalia can show bridge operators that they're actually making
30167 - Build correctly against versions of OpenSSL 0.9.8 or later built
30168 without support for deprecated functions.
30169 - Update to the "December 19 2008" ip-to-country file.
30171 o Minor bugfixes (on 0.2.0.x):
30172 - Authorities now vote for the Stable flag for any router whose
30173 weighted MTBF is at least 5 days, regardless of the mean MTBF.
30174 - Do not remove routers as too old if we do not have any consensus
30175 document. Bugfix on 0.2.0.7-alpha.
30176 - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid.
30177 Spec conformance issue. Bugfix on Tor 0.0.2pre27.
30178 - When an exit relay resolves a stream address to a local IP address,
30179 do not just keep retrying that same exit relay over and
30180 over. Instead, just close the stream. Addresses bug 872. Bugfix
30181 on 0.2.0.32. Patch from rovv.
30182 - If a hidden service sends us an END cell, do not consider
30183 retrying the connection; just close it. Patch from rovv.
30184 - When we made bridge authorities stop serving bridge descriptors over
30185 unencrypted links, we also broke DirPort reachability testing for
30186 bridges. So bridges with a non-zero DirPort were printing spurious
30187 warns to their logs. Bugfix on 0.2.0.16-alpha. Fixes bug 709.
30188 - When a relay gets a create cell it can't decrypt (e.g. because it's
30189 using the wrong onion key), we were dropping it and letting the
30190 client time out. Now actually answer with a destroy cell. Fixes
30191 bug 904. Bugfix on 0.0.2pre8.
30192 - Squeeze 2-5% out of client performance (according to oprofile) by
30193 improving the implementation of some policy-manipulation functions.
30195 o Minor bugfixes (on 0.2.1.x):
30196 - Make get_interface_address() function work properly again; stop
30197 guessing the wrong parts of our address as our address.
30198 - Do not cannibalize a circuit if we're out of RELAY_EARLY cells to
30199 send on that circuit. Otherwise we might violate the proposal-110
30200 limit. Bugfix on 0.2.1.3-alpha. Partial fix for bug 878. Diagnosis
30202 - When we're sending non-EXTEND cells to the first hop in a circuit,
30203 for example to use an encrypted directory connection, we don't need
30204 to use RELAY_EARLY cells: the first hop knows what kind of cell
30205 it is, and nobody else can even see the cell type. Conserving
30206 RELAY_EARLY cells makes it easier to cannibalize circuits like
30208 - Stop logging nameserver addresses in reverse order.
30209 - If we are retrying a directory download slowly over and over, do
30210 not automatically give up after the 254th failure. Bugfix on
30212 - Resume reporting accurate "stream end" reasons to the local control
30213 port. They were lost in the changes for Proposal 148. Bugfix on
30216 o Deprecated and removed features:
30217 - The old "tor --version --version" command, which would print out
30218 the subversion "Id" of most of the source files, is now removed. It
30219 turned out to be less useful than we'd expected, and harder to
30222 o Code simplifications and refactoring:
30223 - Change our header file guard macros to be less likely to conflict
30224 with system headers. Adam Langley noticed that we were conflicting
30225 with log.h on Android.
30226 - Tool-assisted documentation cleanup. Nearly every function or
30227 static variable in Tor should have its own documentation now.
30230 Changes in version 0.2.1.9-alpha - 2008-12-25
30231 Tor 0.2.1.9-alpha fixes many more bugs, some of them security-related.
30233 o New directory authorities:
30234 - gabelmoo (the authority run by Karsten Loesing) now has a new
30238 - Never use a connection with a mismatched address to extend a
30239 circuit, unless that connection is canonical. A canonical
30240 connection is one whose address is authenticated by the router's
30241 identity key, either in a NETINFO cell or in a router descriptor.
30242 - Avoid a possible memory corruption bug when receiving hidden service
30243 descriptors. Bugfix on 0.2.1.6-alpha.
30246 - Fix a logic error that would automatically reject all but the first
30247 configured DNS server. Bugfix on 0.2.1.5-alpha. Possible fix for
30248 part of bug 813/868. Bug spotted by coderman.
30249 - When a stream at an exit relay is in state "resolving" or
30250 "connecting" and it receives an "end" relay cell, the exit relay
30251 would silently ignore the end cell and not close the stream. If
30252 the client never closes the circuit, then the exit relay never
30253 closes the TCP connection. Bug introduced in 0.1.2.1-alpha;
30254 reported by "wood".
30255 - When we can't initialize DNS because the network is down, do not
30256 automatically stop Tor from starting. Instead, retry failed
30257 dns_init() every 10 minutes, and change the exit policy to reject
30258 *:* until one succeeds. Fixes bug 691.
30261 - Give a better error message when an overzealous init script says
30262 "sudo -u username tor --user username". Makes Bug 882 easier for
30264 - When a directory authority gives us a new guess for our IP address,
30265 log which authority we used. Hopefully this will help us debug
30266 the recent complaints about bad IP address guesses.
30267 - Detect svn revision properly when we're using git-svn.
30268 - Try not to open more than one descriptor-downloading connection
30269 to an authority at once. This should reduce load on directory
30270 authorities. Fixes bug 366.
30271 - Add cross-certification to newly generated certificates, so that
30272 a signing key is enough information to look up a certificate.
30273 Partial implementation of proposal 157.
30274 - Start serving certificates by <identity digest, signing key digest>
30275 pairs. Partial implementation of proposal 157.
30276 - Clients now never report any stream end reason except 'MISC'.
30277 Implements proposal 148.
30278 - On platforms with a maximum syslog string length, truncate syslog
30279 messages to that length ourselves, rather than relying on the
30280 system to do it for us.
30281 - Optimize out calls to time(NULL) that occur for every IO operation,
30282 or for every cell. On systems where time() is a slow syscall,
30283 this fix will be slightly helpful.
30284 - Exit servers can now answer resolve requests for ip6.arpa addresses.
30285 - When we download a descriptor that we then immediately (as
30286 a directory authority) reject, do not retry downloading it right
30287 away. Should save some bandwidth on authorities. Fix for bug
30288 888. Patch by Sebastian Hahn.
30289 - When a download gets us zero good descriptors, do not notify
30290 Tor that new directory information has arrived.
30291 - Avoid some nasty corner cases in the logic for marking connections
30292 as too old or obsolete or noncanonical for circuits. Partial
30295 o Minor features (controller):
30296 - New CONSENSUS_ARRIVED event to note when a new consensus has
30297 been fetched and validated.
30298 - When we realize that another process has modified our cached
30299 descriptors file, print out a more useful error message rather
30300 than triggering an assertion. Fixes bug 885. Patch from Karsten.
30301 - Add an internal-use-only __ReloadTorrcOnSIGHUP option for
30302 controllers to prevent SIGHUP from reloading the
30303 configuration. Fixes bug 856.
30306 - Resume using the correct "REASON=" stream when telling the
30307 controller why we closed a stream. Bugfix in 0.2.1.1-alpha.
30308 - When a canonical connection appears later in our internal list
30309 than a noncanonical one for a given OR ID, always use the
30310 canonical one. Bugfix on 0.2.0.12-alpha. Fixes bug 805.
30312 - Clip the MaxCircuitDirtiness config option to a minimum of 10
30313 seconds. Warn the user if lower values are given in the
30314 configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
30315 - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
30316 user if lower values are given in the configuration. Bugfix on
30317 0.1.1.17-rc. Patch by Sebastian.
30318 - Fix a race condition when freeing keys shared between main thread
30319 and CPU workers that could result in a memory leak. Bugfix on
30320 0.1.0.1-rc. Fixes bug 889.
30322 o Minor bugfixes (hidden services):
30323 - Do not throw away existing introduction points on SIGHUP (bugfix on
30324 0.0.6pre1); also, do not stall hidden services because we're
30325 throwing away introduction points; bugfix on 0.2.1.7-alpha. Spotted
30326 by John Brooks. Patch by Karsten. Fixes bug 874.
30327 - Fix a memory leak when we decline to add a v2 rendezvous
30328 descriptor to the cache because we already had a v0 descriptor
30329 with the same ID. Bugfix on 0.2.0.18-alpha.
30331 o Deprecated and removed features:
30332 - RedirectExits has been removed. It was deprecated since
30334 - Finally remove deprecated "EXTENDED_FORMAT" controller feature. It
30335 has been called EXTENDED_EVENTS since 0.1.2.4-alpha.
30336 - Cell pools are now always enabled; --disable-cell-pools is ignored.
30338 o Code simplifications and refactoring:
30339 - Rename the confusing or_is_obsolete field to the more appropriate
30340 is_bad_for_new_circs, and move it to or_connection_t where it
30342 - Move edge-only flags from connection_t to edge_connection_t: not
30343 only is this better coding, but on machines of plausible alignment,
30344 it should save 4-8 bytes per connection_t. "Every little bit helps."
30345 - Rename ServerDNSAllowBrokenResolvConf to ServerDNSAllowBrokenConfig
30346 for consistency; keep old option working for backward compatibility.
30347 - Simplify the code for finding connections to use for a circuit.
30350 Changes in version 0.2.1.8-alpha - 2008-12-08
30351 Tor 0.2.1.8-alpha fixes some crash bugs in earlier alpha releases,
30352 builds better on unusual platforms like Solaris and old OS X, and
30353 fixes a variety of other issues.
30356 - New DirPortFrontPage option that takes an html file and publishes
30357 it as "/" on the DirPort. Now relay operators can provide a
30358 disclaimer without needing to set up a separate webserver. There's
30359 a sample disclaimer in contrib/tor-exit-notice.html.
30362 - When the client is choosing entry guards, now it selects at most
30363 one guard from a given relay family. Otherwise we could end up with
30364 all of our entry points into the network run by the same operator.
30365 Suggested by Camilo Viecco. Fix on 0.1.1.11-alpha.
30368 - Fix a DOS opportunity during the voting signature collection process
30369 at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
30370 - Fix a possible segfault when establishing an exit connection. Bugfix
30374 - Get file locking working on win32. Bugfix on 0.2.1.6-alpha. Fixes
30376 - Made Tor a little less aggressive about deleting expired
30377 certificates. Partial fix for bug 854.
30378 - Stop doing unaligned memory access that generated bus errors on
30379 sparc64. Bugfix on 0.2.0.10-alpha. Fix for bug 862.
30380 - Fix a crash bug when changing EntryNodes from the controller. Bugfix
30381 on 0.2.1.6-alpha. Fix for bug 867. Patched by Sebastian.
30382 - Make USR2 log-level switch take effect immediately. Bugfix on
30384 - If one win32 nameserver fails to get added, continue adding the
30385 rest, and don't automatically fail.
30386 - Use fcntl() for locking when flock() is not available. Should fix
30387 compilation on Solaris. Should fix Bug 873. Bugfix on 0.2.1.6-alpha.
30388 - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
30389 could make gcc generate non-functional binary search code. Bugfix
30391 - Build correctly on platforms without socklen_t.
30392 - Avoid potential crash on internal error during signature collection.
30393 Fixes bug 864. Patch from rovv.
30394 - Do not use C's stdio library for writing to log files. This will
30395 improve logging performance by a minute amount, and will stop
30396 leaking fds when our disk is full. Fixes bug 861.
30397 - Stop erroneous use of O_APPEND in cases where we did not in fact
30398 want to re-seek to the end of a file before every last write().
30399 - Correct handling of possible malformed authority signing key
30400 certificates with internal signature types. Fixes bug 880. Bugfix
30402 - Fix a hard-to-trigger resource leak when logging credential status.
30406 - Directory mirrors no longer fetch the v1 directory or
30407 running-routers files. They are obsolete, and nobody asks for them
30408 anymore. This is the first step to making v1 authorities obsolete.
30410 o Minor features (controller):
30411 - Return circuit purposes in response to GETINFO circuit-status. Fixes
30415 Changes in version 0.2.0.32 - 2008-11-20
30416 Tor 0.2.0.32 fixes a major security problem in Debian and Ubuntu
30417 packages (and maybe other packages) noticed by Theo de Raadt, fixes
30418 a smaller security flaw that might allow an attacker to access local
30419 services, further improves hidden service performance, and fixes a
30420 variety of other issues.
30423 - The "User" and "Group" config options did not clear the
30424 supplementary group entries for the Tor process. The "User" option
30425 is now more robust, and we now set the groups to the specified
30426 user's primary group. The "Group" option is now ignored. For more
30427 detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
30428 in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
30429 and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848 and 857.
30430 - The "ClientDNSRejectInternalAddresses" config option wasn't being
30431 consistently obeyed: if an exit relay refuses a stream because its
30432 exit policy doesn't allow it, we would remember what IP address
30433 the relay said the destination address resolves to, even if it's
30434 an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
30437 - Fix a DOS opportunity during the voting signature collection process
30438 at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
30440 o Major bugfixes (hidden services):
30441 - When fetching v0 and v2 rendezvous service descriptors in parallel,
30442 we were failing the whole hidden service request when the v0
30443 descriptor fetch fails, even if the v2 fetch is still pending and
30444 might succeed. Similarly, if the last v2 fetch fails, we were
30445 failing the whole hidden service request even if a v0 fetch is
30446 still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
30447 - When extending a circuit to a hidden service directory to upload a
30448 rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
30449 requests failed, because the router descriptor has not been
30450 downloaded yet. In these cases, do not attempt to upload the
30451 rendezvous descriptor, but wait until the router descriptor is
30452 downloaded and retry. Likewise, do not attempt to fetch a rendezvous
30453 descriptor from a hidden service directory for which the router
30454 descriptor has not yet been downloaded. Fixes bug 767. Bugfix
30458 - Fix several infrequent memory leaks spotted by Coverity.
30459 - When testing for libevent functions, set the LDFLAGS variable
30460 correctly. Found by Riastradh.
30461 - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
30462 bootstrapping with tunneled directory connections. Bugfix on
30463 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
30464 - When asked to connect to A.B.exit:80, if we don't know the IP for A
30465 and we know that server B rejects most-but-not all connections to
30466 port 80, we would previously reject the connection. Now, we assume
30467 the user knows what they were asking for. Fixes bug 752. Bugfix
30468 on 0.0.9rc5. Diagnosed by BarkerJr.
30469 - If we overrun our per-second write limits a little, count this as
30470 having used up our write allocation for the second, and choke
30471 outgoing directory writes. Previously, we had only counted this when
30472 we had met our limits precisely. Fixes bug 824. Patch from by rovv.
30473 Bugfix on 0.2.0.x (??).
30474 - Remove the old v2 directory authority 'lefkada' from the default
30475 list. It has been gone for many months.
30476 - Stop doing unaligned memory access that generated bus errors on
30477 sparc64. Bugfix on 0.2.0.10-alpha. Fixes bug 862.
30478 - Make USR2 log-level switch take effect immediately. Bugfix on
30481 o Minor bugfixes (controller):
30482 - Make DNS resolved events into "CLOSED", not "FAILED". Bugfix on
30483 0.1.2.5-alpha. Fix by Robert Hogan. Resolves bug 807.
30486 Changes in version 0.2.1.7-alpha - 2008-11-08
30487 Tor 0.2.1.7-alpha fixes a major security problem in Debian and Ubuntu
30488 packages (and maybe other packages) noticed by Theo de Raadt, fixes
30489 a smaller security flaw that might allow an attacker to access local
30490 services, adds better defense against DNS poisoning attacks on exit
30491 relays, further improves hidden service performance, and fixes a
30492 variety of other issues.
30495 - The "ClientDNSRejectInternalAddresses" config option wasn't being
30496 consistently obeyed: if an exit relay refuses a stream because its
30497 exit policy doesn't allow it, we would remember what IP address
30498 the relay said the destination address resolves to, even if it's
30499 an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
30500 - The "User" and "Group" config options did not clear the
30501 supplementary group entries for the Tor process. The "User" option
30502 is now more robust, and we now set the groups to the specified
30503 user's primary group. The "Group" option is now ignored. For more
30504 detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
30505 in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
30506 and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848.
30507 - Do not use or believe expired v3 authority certificates. Patch
30508 from Karsten. Bugfix in 0.2.0.x. Fixes bug 851.
30511 - Now NodeFamily and MyFamily config options allow spaces in
30512 identity fingerprints, so it's easier to paste them in.
30513 Suggested by Lucky Green.
30514 - Implement the 0x20 hack to better resist DNS poisoning: set the
30515 case on outgoing DNS requests randomly, and reject responses that do
30516 not match the case correctly. This logic can be disabled with the
30517 ServerDNSRandomizeCase setting, if you are using one of the 0.3%
30518 of servers that do not reliably preserve case in replies. See
30519 "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
30521 - Preserve case in replies to DNSPort requests in order to support
30522 the 0x20 hack for resisting DNS poisoning attacks.
30524 o Hidden service performance improvements:
30525 - When the client launches an introduction circuit, retry with a
30526 new circuit after 30 seconds rather than 60 seconds.
30527 - Launch a second client-side introduction circuit in parallel
30528 after a delay of 15 seconds (based on work by Christian Wilms).
30529 - Hidden services start out building five intro circuits rather
30530 than three, and when the first three finish they publish a service
30531 descriptor using those. Now we publish our service descriptor much
30532 faster after restart.
30535 - Minor fix in the warning messages when you're having problems
30536 bootstrapping; also, be more forgiving of bootstrap problems when
30537 we're still making incremental progress on a given bootstrap phase.
30538 - When we're choosing an exit node for a circuit, and we have
30539 no pending streams, choose a good general exit rather than one that
30540 supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
30541 - Send a valid END cell back when a client tries to connect to a
30542 nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
30543 840. Patch from rovv.
30544 - If a broken client asks a non-exit router to connect somewhere,
30545 do not even do the DNS lookup before rejecting the connection.
30546 Fixes another case of bug 619. Patch from rovv.
30547 - Fix another case of assuming, when a specific exit is requested,
30548 that we know more than the user about what hosts it allows.
30549 Fixes another case of bug 752. Patch from rovv.
30550 - Check which hops rendezvous stream cells are associated with to
30551 prevent possible guess-the-streamid injection attacks from
30552 intermediate hops. Fixes another case of bug 446. Based on patch
30554 - Avoid using a negative right-shift when comparing 32-bit
30555 addresses. Possible fix for bug 845 and bug 811.
30556 - Make the assert_circuit_ok() function work correctly on circuits that
30557 have already been marked for close.
30558 - Fix read-off-the-end-of-string error in unit tests when decoding
30559 introduction points.
30560 - Fix uninitialized size field for memory area allocation: may improve
30561 memory performance during directory parsing.
30562 - Treat duplicate certificate fetches as failures, so that we do
30563 not try to re-fetch an expired certificate over and over and over.
30564 - Do not say we're fetching a certificate when we'll in fact skip it
30565 because of a pending download.
30568 Changes in version 0.2.1.6-alpha - 2008-09-30
30569 Tor 0.2.1.6-alpha further improves performance and robustness of
30570 hidden services, starts work on supporting per-country relay selection,
30571 and fixes a variety of smaller issues.
30574 - Implement proposal 121: make it possible to build hidden services
30575 that only certain clients are allowed to connect to. This is
30576 enforced at several points, so that unauthorized clients are unable
30577 to send INTRODUCE cells to the service, or even (depending on the
30578 type of authentication) to learn introduction points. This feature
30579 raises the bar for certain kinds of active attacks against hidden
30580 services. Code by Karsten Loesing.
30581 - Relays now store and serve v2 hidden service descriptors by default,
30582 i.e., the new default value for HidServDirectoryV2 is 1. This is
30583 the last step in proposal 114, which aims to make hidden service
30584 lookups more reliable.
30585 - Start work to allow node restrictions to include country codes. The
30586 syntax to exclude nodes in a country with country code XX is
30587 "ExcludeNodes {XX}". Patch from Robert Hogan. It still needs some
30588 refinement to decide what config options should take priority if
30589 you ask to both use a particular node and exclude it.
30590 - Allow ExitNodes list to include IP ranges and country codes, just
30591 like the Exclude*Nodes lists. Patch from Robert Hogan.
30594 - Fix a bug when parsing ports in tor_addr_port_parse() that caused
30595 Tor to fail to start if you had it configured to use a bridge
30596 relay. Fixes bug 809. Bugfix on 0.2.1.5-alpha.
30597 - When extending a circuit to a hidden service directory to upload a
30598 rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
30599 requests failed, because the router descriptor had not been
30600 downloaded yet. In these cases, we now wait until the router
30601 descriptor is downloaded, and then retry. Likewise, clients
30602 now skip over a hidden service directory if they don't yet have
30603 its router descriptor, rather than futilely requesting it and
30604 putting mysterious complaints in the logs. Fixes bug 767. Bugfix
30606 - When fetching v0 and v2 rendezvous service descriptors in parallel,
30607 we were failing the whole hidden service request when the v0
30608 descriptor fetch fails, even if the v2 fetch is still pending and
30609 might succeed. Similarly, if the last v2 fetch fails, we were
30610 failing the whole hidden service request even if a v0 fetch is
30611 still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
30612 - DNS replies need to have names matching their requests, but
30613 these names should be in the questions section, not necessarily
30614 in the answers section. Fixes bug 823. Bugfix on 0.2.1.5-alpha.
30617 - Update to the "September 1 2008" ip-to-country file.
30618 - Allow ports 465 and 587 in the default exit policy again. We had
30619 rejected them in 0.1.0.15, because back in 2005 they were commonly
30620 misconfigured and ended up as spam targets. We hear they are better
30621 locked down these days.
30622 - Use a lockfile to make sure that two Tor processes are not
30623 simultaneously running with the same datadir.
30624 - Serve the latest v3 networkstatus consensus via the control
30625 port. Use "getinfo dir/status-vote/current/consensus" to fetch it.
30626 - Better logging about stability/reliability calculations on directory
30628 - Drop the requirement to have an open dir port for storing and
30629 serving v2 hidden service descriptors.
30630 - Directory authorities now serve a /tor/dbg-stability.txt URL to
30631 help debug WFU and MTBF calculations.
30632 - Implement most of Proposal 152: allow specialized servers to permit
30633 single-hop circuits, and clients to use those servers to build
30634 single-hop circuits when using a specialized controller. Patch
30635 from Josh Albrecht. Resolves feature request 768.
30636 - Add a -p option to tor-resolve for specifying the SOCKS port: some
30637 people find host:port too confusing.
30638 - Make TrackHostExit mappings expire a while after their last use, not
30639 after their creation. Patch from Robert Hogan.
30640 - Provide circuit purposes along with circuit events to the controller.
30643 - Fix compile on OpenBSD 4.4-current. Bugfix on 0.2.1.5-alpha.
30645 - Fixed some memory leaks -- some quite frequent, some almost
30646 impossible to trigger -- based on results from Coverity.
30647 - When testing for libevent functions, set the LDFLAGS variable
30648 correctly. Found by Riastradh.
30649 - Fix an assertion bug in parsing policy-related options; possible fix
30651 - Catch and report a few more bootstrapping failure cases when Tor
30652 fails to establish a TCP connection. Cleanup on 0.2.1.x.
30653 - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
30654 bootstrapping with tunneled directory connections. Bugfix on
30655 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
30656 - When asked to connect to A.B.exit:80, if we don't know the IP for A
30657 and we know that server B rejects most-but-not all connections to
30658 port 80, we would previously reject the connection. Now, we assume
30659 the user knows what they were asking for. Fixes bug 752. Bugfix
30660 on 0.0.9rc5. Diagnosed by BarkerJr.
30661 - If we are not using BEGIN_DIR cells, don't attempt to contact hidden
30662 service directories if they have no advertised dir port. Bugfix
30664 - If we overrun our per-second write limits a little, count this as
30665 having used up our write allocation for the second, and choke
30666 outgoing directory writes. Previously, we had only counted this when
30667 we had met our limits precisely. Fixes bug 824. Patch by rovv.
30668 Bugfix on 0.2.0.x (??).
30669 - Avoid a "0 divided by 0" calculation when calculating router uptime
30670 at directory authorities. Bugfix on 0.2.0.8-alpha.
30671 - Make DNS resolved controller events into "CLOSED", not
30672 "FAILED". Bugfix on 0.1.2.5-alpha. Fix by Robert Hogan. Resolves
30674 - Fix a bug where an unreachable relay would establish enough
30675 reachability testing circuits to do a bandwidth test -- if
30676 we already have a connection to the middle hop of the testing
30677 circuit, then it could establish the last hop by using the existing
30678 connection. Bugfix on 0.1.2.2-alpha, exposed when we made testing
30679 circuits no longer use entry guards in 0.2.1.3-alpha.
30680 - If we have correct permissions on $datadir, we complain to stdout
30681 and fail to start. But dangerous permissions on
30682 $datadir/cached-status/ would cause us to open a log and complain
30683 there. Now complain to stdout and fail to start in both cases. Fixes
30684 bug 820, reported by seeess.
30685 - Remove the old v2 directory authority 'lefkada' from the default
30686 list. It has been gone for many months.
30688 o Code simplifications and refactoring:
30689 - Revise the connection_new functions so that a more typesafe variant
30690 exists. This will work better with Coverity, and let us find any
30691 actual mistakes we're making here.
30692 - Refactor unit testing logic so that dmalloc can be used sensibly
30693 with unit tests to check for memory leaks.
30694 - Move all hidden-service related fields from connection and circuit
30695 structure to substructures: this way they won't eat so much memory.
30698 Changes in version 0.2.0.31 - 2008-09-03
30699 Tor 0.2.0.31 addresses two potential anonymity issues, starts to fix
30700 a big bug we're seeing where in rare cases traffic from one Tor stream
30701 gets mixed into another stream, and fixes a variety of smaller issues.
30704 - Make sure that two circuits can never exist on the same connection
30705 with the same circuit ID, even if one is marked for close. This
30706 is conceivably a bugfix for bug 779. Bugfix on 0.1.0.4-rc.
30707 - Relays now reject risky extend cells: if the extend cell includes
30708 a digest of all zeroes, or asks to extend back to the relay that
30709 sent the extend cell, tear down the circuit. Ideas suggested
30711 - If not enough of our entry guards are available so we add a new
30712 one, we might use the new one even if it overlapped with the
30713 current circuit's exit relay (or its family). Anonymity bugfix
30714 pointed out by rovv.
30717 - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
30718 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
30719 - Correctly detect the presence of the linux/netfilter_ipv4.h header
30720 when building against recent kernels. Bugfix on 0.1.2.1-alpha.
30721 - Pick size of default geoip filename string correctly on windows.
30722 Fixes bug 806. Bugfix on 0.2.0.30.
30723 - Make the autoconf script accept the obsolete --with-ssl-dir
30724 option as an alias for the actually-working --with-openssl-dir
30725 option. Fix the help documentation to recommend --with-openssl-dir.
30726 Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
30727 - When using the TransPort option on OpenBSD, and using the User
30728 option to change UID and drop privileges, make sure to open
30729 /dev/pf before dropping privileges. Fixes bug 782. Patch from
30730 Christopher Davis. Bugfix on 0.1.2.1-alpha.
30731 - Try to attach connections immediately upon receiving a RENDEZVOUS2
30732 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
30733 on the client side when connecting to a hidden service. Bugfix
30734 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
30735 - When closing an application-side connection because its circuit is
30736 getting torn down, generate the stream event correctly. Bugfix on
30737 0.1.2.x. Anonymous patch.
30740 Changes in version 0.2.1.5-alpha - 2008-08-31
30741 Tor 0.2.1.5-alpha moves us closer to handling IPv6 destinations, puts
30742 in a lot of the infrastructure for adding authorization to hidden
30743 services, lays the groundwork for having clients read their load
30744 balancing information out of the networkstatus consensus rather than
30745 the individual router descriptors, addresses two potential anonymity
30746 issues, and fixes a variety of smaller issues.
30749 - Convert many internal address representations to optionally hold
30751 - Generate and accept IPv6 addresses in many protocol elements.
30752 - Make resolver code handle nameservers located at ipv6 addresses.
30753 - Begin implementation of proposal 121 ("Client authorization for
30754 hidden services"): configure hidden services with client
30755 authorization, publish descriptors for them, and configure
30756 authorization data for hidden services at clients. The next
30757 step is to actually access hidden services that perform client
30759 - More progress toward proposal 141: Network status consensus
30760 documents and votes now contain bandwidth information for each
30761 router and a summary of that router's exit policy. Eventually this
30762 will be used by clients so that they do not have to download every
30763 known descriptor before building circuits.
30765 o Major bugfixes (on 0.2.0.x and before):
30766 - When sending CREATED cells back for a given circuit, use a 64-bit
30767 connection ID to find the right connection, rather than an addr:port
30768 combination. Now that we can have multiple OR connections between
30769 the same ORs, it is no longer possible to use addr:port to uniquely
30770 identify a connection.
30771 - Relays now reject risky extend cells: if the extend cell includes
30772 a digest of all zeroes, or asks to extend back to the relay that
30773 sent the extend cell, tear down the circuit. Ideas suggested
30775 - If not enough of our entry guards are available so we add a new
30776 one, we might use the new one even if it overlapped with the
30777 current circuit's exit relay (or its family). Anonymity bugfix
30778 pointed out by rovv.
30781 - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
30782 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
30783 - When using the TransPort option on OpenBSD, and using the User
30784 option to change UID and drop privileges, make sure to open /dev/pf
30785 before dropping privileges. Fixes bug 782. Patch from Christopher
30786 Davis. Bugfix on 0.1.2.1-alpha.
30787 - Correctly detect the presence of the linux/netfilter_ipv4.h header
30788 when building against recent kernels. Bugfix on 0.1.2.1-alpha.
30789 - Add a missing safe_str() call for a debug log message.
30790 - Use 64 bits instead of 32 bits for connection identifiers used with
30791 the controller protocol, to greatly reduce risk of identifier reuse.
30792 - Make the autoconf script accept the obsolete --with-ssl-dir
30793 option as an alias for the actually-working --with-openssl-dir
30794 option. Fix the help documentation to recommend --with-openssl-dir.
30795 Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
30798 - Rate-limit too-many-sockets messages: when they happen, they happen
30799 a lot. Resolves bug 748.
30800 - Resist DNS poisoning a little better by making sure that names in
30801 answer sections match.
30802 - Print the SOCKS5 error message string as well as the error code
30803 when a tor-resolve request fails. Patch from Jacob.
30806 Changes in version 0.2.1.4-alpha - 2008-08-04
30807 Tor 0.2.1.4-alpha fixes a pair of crash bugs in 0.2.1.3-alpha.
30810 - The address part of exit policies was not correctly written
30811 to router descriptors. This generated router descriptors that failed
30812 their self-checks. Noticed by phobos, fixed by Karsten. Bugfix
30814 - Tor triggered a false assert when extending a circuit to a relay
30815 but we already have a connection open to that relay. Noticed by
30816 phobos, fixed by Karsten. Bugfix on 0.2.1.3-alpha.
30819 - Fix a hidden service logging bug: in some edge cases, the router
30820 descriptor of a previously picked introduction point becomes
30821 obsolete and we need to give up on it rather than continually
30822 complaining that it has become obsolete. Observed by xiando. Bugfix
30825 o Removed features:
30826 - Take out the TestVia config option, since it was a workaround for
30827 a bug that was fixed in Tor 0.1.1.21.
30830 Changes in version 0.2.1.3-alpha - 2008-08-03
30831 Tor 0.2.1.3-alpha implements most of the pieces to prevent
30832 infinite-length circuit attacks (see proposal 110); fixes a bug that
30833 might cause exit relays to corrupt streams they send back; allows
30834 address patterns (e.g. 255.128.0.0/16) to appear in ExcludeNodes and
30835 ExcludeExitNodes config options; and fixes a big pile of bugs.
30837 o Bootstrapping bugfixes (on 0.2.1.x-alpha):
30838 - Send a bootstrap problem "warn" event on the first problem if the
30839 reason is NO_ROUTE (that is, our network is down).
30842 - Implement most of proposal 110: The first K cells to be sent
30843 along a circuit are marked as special "early" cells; only K "early"
30844 cells will be allowed. Once this code is universal, we can block
30845 certain kinds of DOS attack by requiring that EXTEND commands must
30846 be sent using an "early" cell.
30849 - Try to attach connections immediately upon receiving a RENDEZVOUS2
30850 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
30851 on the client side when connecting to a hidden service. Bugfix
30852 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
30853 - Ensure that two circuits can never exist on the same connection
30854 with the same circuit ID, even if one is marked for close. This
30855 is conceivably a bugfix for bug 779; fixes a bug on 0.1.0.4-rc.
30858 - When relays do their initial bandwidth measurement, don't limit
30859 to just our entry guards for the test circuits. Otherwise we tend
30860 to have multiple test circuits going through a single entry guard,
30861 which makes our bandwidth test less accurate. Fixes part of bug 654;
30862 patch contributed by Josh Albrecht.
30863 - Add an ExcludeExitNodes option so users can list a set of nodes
30864 that should be be excluded from the exit node position, but
30865 allowed elsewhere. Implements proposal 151.
30866 - Allow address patterns (e.g., 255.128.0.0/16) to appear in
30867 ExcludeNodes and ExcludeExitNodes lists.
30868 - Change the implementation of ExcludeNodes and ExcludeExitNodes to
30869 be more efficient. Formerly it was quadratic in the number of
30870 servers; now it should be linear. Fixes bug 509.
30871 - Save 16-22 bytes per open circuit by moving the n_addr, n_port,
30872 and n_conn_id_digest fields into a separate structure that's
30873 only needed when the circuit has not yet attached to an n_conn.
30876 - Change the contrib/tor.logrotate script so it makes the new
30877 logs as "_tor:_tor" rather than the default, which is generally
30878 "root:wheel". Fixes bug 676, reported by Serge Koksharov.
30879 - Stop using __attribute__((nonnull)) with GCC: it can give us useful
30880 warnings (occasionally), but it can also cause the compiler to
30881 eliminate error-checking code. Suggested by Peter Gutmann.
30882 - When a hidden service is giving up on an introduction point candidate
30883 that was not included in the last published rendezvous descriptor,
30884 don't reschedule publication of the next descriptor. Fixes bug 763.
30886 - Mark RendNodes, RendExcludeNodes, HiddenServiceNodes, and
30887 HiddenServiceExcludeNodes as obsolete: they never worked properly,
30888 and nobody claims to be using them. Fixes bug 754. Bugfix on
30889 0.1.0.1-rc. Patch from Christian Wilms.
30890 - Fix a small alignment and memory-wasting bug on buffer chunks.
30893 o Minor bugfixes (controller):
30894 - When closing an application-side connection because its circuit
30895 is getting torn down, generate the stream event correctly.
30896 Bugfix on 0.1.2.x. Anonymous patch.
30898 o Removed features:
30899 - Remove all backward-compatibility code to support relays running
30900 versions of Tor so old that they no longer work at all on the
30904 Changes in version 0.2.0.30 - 2008-07-15
30906 - Stop using __attribute__((nonnull)) with GCC: it can give us useful
30907 warnings (occasionally), but it can also cause the compiler to
30908 eliminate error-checking code. Suggested by Peter Gutmann.
30911 Changes in version 0.2.0.29-rc - 2008-07-08
30912 Tor 0.2.0.29-rc fixes two big bugs with using bridges, fixes more
30913 hidden-service performance bugs, and fixes a bunch of smaller bugs.
30916 - If you have more than one bridge but don't know their keys,
30917 you would only launch a request for the descriptor of the first one
30918 on your list. (Tor considered launching requests for the others, but
30919 found that it already had a connection on the way for $0000...0000
30920 so it didn't open another.) Bugfix on 0.2.0.x.
30921 - If you have more than one bridge but don't know their keys, and the
30922 connection to one of the bridges failed, you would cancel all
30923 pending bridge connections. (After all, they all have the same
30924 digest.) Bugfix on 0.2.0.x.
30925 - When a hidden service was trying to establish an introduction point,
30926 and Tor had built circuits preemptively for such purposes, we
30927 were ignoring all the preemptive circuits and launching a new one
30928 instead. Bugfix on 0.2.0.14-alpha.
30929 - When a hidden service was trying to establish an introduction point,
30930 and Tor *did* manage to reuse one of the preemptively built
30931 circuits, it didn't correctly remember which one it used,
30932 so it asked for another one soon after, until there were no
30933 more preemptive circuits, at which point it launched one from
30934 scratch. Bugfix on 0.0.9.x.
30935 - Make directory servers include the X-Your-Address-Is: http header in
30936 their responses even for begin_dir conns. Now clients who only
30937 ever use begin_dir connections still have a way to learn their IP
30938 address. Fixes bug 737; bugfix on 0.2.0.22-rc. Reported by goldy.
30941 - Fix a macro/CPP interaction that was confusing some compilers:
30942 some GCCs don't like #if/#endif pairs inside macro arguments.
30944 - Fix macro collision between OpenSSL 0.9.8h and Windows headers.
30945 Fixes bug 704; fix from Steven Murdoch.
30946 - When opening /dev/null in finish_daemonize(), do not pass the
30947 O_CREAT flag. Fortify was complaining, and correctly so. Fixes
30948 bug 742; fix from Michael Scherer. Bugfix on 0.0.2pre19.
30949 - Correctly detect transparent proxy support on Linux hosts that
30950 require in.h to be included before netfilter_ipv4.h. Patch
30952 - Disallow session resumption attempts during the renegotiation
30953 stage of the v2 handshake protocol. Clients should never be trying
30954 session resumption at this point, but apparently some did, in
30955 ways that caused the handshake to fail. Bugfix on 0.2.0.20-rc. Bug
30956 found by Geoff Goodell.
30959 Changes in version 0.2.1.2-alpha - 2008-06-20
30960 Tor 0.2.1.2-alpha includes a new "TestingTorNetwork" config option to
30961 make it easier to set up your own private Tor network; fixes several
30962 big bugs with using more than one bridge relay; fixes a big bug with
30963 offering hidden services quickly after Tor starts; and uses a better
30964 API for reporting potential bootstrapping problems to the controller.
30967 - New TestingTorNetwork config option to allow adjustment of
30968 previously constant values that, while reasonable, could slow
30969 bootstrapping. Implements proposal 135. Patch from Karsten.
30972 - If you have more than one bridge but don't know their digests,
30973 you would only learn a request for the descriptor of the first one
30974 on your list. (Tor considered launching requests for the others, but
30975 found that it already had a connection on the way for $0000...0000
30976 so it didn't open another.) Bugfix on 0.2.0.x.
30977 - If you have more than one bridge but don't know their digests,
30978 and the connection to one of the bridges failed, you would cancel
30979 all pending bridge connections. (After all, they all have the
30980 same digest.) Bugfix on 0.2.0.x.
30981 - When establishing a hidden service, introduction points that
30982 originate from cannibalized circuits are completely ignored and not
30983 included in rendezvous service descriptors. This might be another
30984 reason for delay in making a hidden service available. Bugfix
30985 from long ago (0.0.9.x?)
30988 - Allow OpenSSL to use dynamic locks if it wants.
30989 - When building a consensus, do not include routers that are down.
30990 This will cut down 30% to 40% on consensus size. Implements
30992 - In directory authorities' approved-routers files, allow
30993 fingerprints with or without space.
30994 - Add a "GETINFO /status/bootstrap-phase" controller option, so the
30995 controller can query our current bootstrap state in case it attaches
30996 partway through and wants to catch up.
30997 - Send an initial "Starting" bootstrap status event, so we have a
30998 state to start out in.
31001 - Asking for a conditional consensus at .../consensus/<fingerprints>
31002 would crash a dirserver if it did not already have a
31003 consensus. Bugfix on 0.2.1.1-alpha.
31004 - Clean up some macro/CPP interactions: some GCC versions don't like
31005 #if/#endif pairs inside macro arguments. Fixes bug 707. Bugfix on
31008 o Bootstrapping bugfixes (on 0.2.1.1-alpha):
31009 - Directory authorities shouldn't complain about bootstrapping
31010 problems just because they do a lot of reachability testing and
31011 some of the connection attempts fail.
31012 - Start sending "count" and "recommendation" key/value pairs in
31013 bootstrap problem status events, so the controller can hear about
31014 problems even before Tor decides they're worth reporting for sure.
31015 - If you're using bridges, generate "bootstrap problem" warnings
31016 as soon as you run out of working bridges, rather than waiting
31017 for ten failures -- which will never happen if you have less than
31019 - If we close our OR connection because there's been a circuit
31020 pending on it for too long, we were telling our bootstrap status
31021 events "REASON=NONE". Now tell them "REASON=TIMEOUT".
31024 Changes in version 0.2.1.1-alpha - 2008-06-13
31025 Tor 0.2.1.1-alpha fixes a lot of memory fragmentation problems that
31026 were making the Tor process bloat especially on Linux; makes our TLS
31027 handshake blend in better; sends "bootstrap phase" status events to
31028 the controller, so it can keep the user informed of progress (and
31029 problems) fetching directory information and establishing circuits;
31030 and adds a variety of smaller features.
31033 - More work on making our TLS handshake blend in: modify the list
31034 of ciphers advertised by OpenSSL in client mode to even more
31035 closely resemble a common web browser. We cheat a little so that
31036 we can advertise ciphers that the locally installed OpenSSL doesn't
31038 - Start sending "bootstrap phase" status events to the controller,
31039 so it can keep the user informed of progress fetching directory
31040 information and establishing circuits. Also inform the controller
31041 if we think we're stuck at a particular bootstrap phase. Implements
31043 - Resume using OpenSSL's RAND_poll() for better (and more portable)
31044 cross-platform entropy collection again. We used to use it, then
31045 stopped using it because of a bug that could crash systems that
31046 called RAND_poll when they had a lot of fds open. It looks like the
31047 bug got fixed in late 2006. Our new behavior is to call RAND_poll()
31048 at startup, and to call RAND_poll() when we reseed later only if
31049 we have a non-buggy OpenSSL version.
31052 - When we choose to abandon a new entry guard because we think our
31053 older ones might be better, close any circuits pending on that
31054 new entry guard connection. This fix should make us recover much
31055 faster when our network is down and then comes back. Bugfix on
31056 0.1.2.8-beta; found by lodger.
31058 o Memory fixes and improvements:
31059 - Add a malloc_good_size implementation to OpenBSD_malloc_linux.c,
31060 to avoid unused RAM in buffer chunks and memory pools.
31061 - Speed up parsing and cut down on memory fragmentation by using
31062 stack-style allocations for parsing directory objects. Previously,
31063 this accounted for over 40% of allocations from within Tor's code
31064 on a typical directory cache.
31065 - Use a Bloom filter rather than a digest-based set to track which
31066 descriptors we need to keep around when we're cleaning out old
31067 router descriptors. This speeds up the computation significantly,
31068 and may reduce fragmentation.
31069 - Reduce the default smartlist size from 32 to 16; it turns out that
31070 most smartlists hold around 8-12 elements tops.
31071 - Make dumpstats() log the fullness and size of openssl-internal
31073 - If the user has applied the experimental SSL_MODE_RELEASE_BUFFERS
31074 patch to their OpenSSL, turn it on to save memory on servers. This
31075 patch will (with any luck) get included in a mainline distribution
31077 - Never use OpenSSL compression: it wastes RAM and CPU trying to
31078 compress cells, which are basically all encrypted, compressed,
31082 - Stop reloading the router list from disk for no reason when we
31083 run out of reachable directory mirrors. Once upon a time reloading
31084 it would set the 'is_running' flag back to 1 for them. It hasn't
31085 done that for a long time.
31086 - In very rare situations new hidden service descriptors were
31087 published earlier than 30 seconds after the last change to the
31088 service. (We currently think that a hidden service descriptor
31089 that's been stable for 30 seconds is worth publishing.)
31092 - Allow separate log levels to be configured for different logging
31093 domains. For example, this allows one to log all notices, warnings,
31094 or errors, plus all memory management messages of level debug or
31095 higher, with: Log [MM] debug-err [*] notice-err file /var/log/tor.
31096 - Add a couple of extra warnings to --enable-gcc-warnings for GCC 4.3,
31097 and stop using a warning that had become unfixably verbose under
31099 - New --hush command-line option similar to --quiet. While --quiet
31100 disables all logging to the console on startup, --hush limits the
31101 output to messages of warning and error severity.
31102 - Servers support a new URL scheme for consensus downloads that
31103 allows the client to specify which authorities are trusted.
31104 The server then only sends the consensus if the client will trust
31105 it. Otherwise a 404 error is sent back. Clients use this
31106 new scheme when the server supports it (meaning it's running
31107 0.2.1.1-alpha or later). Implements proposal 134.
31108 - New configure/torrc options (--enable-geoip-stats,
31109 DirRecordUsageByCountry) to record how many IPs we've served
31110 directory info to in each country code, how many status documents
31111 total we've sent to each country code, and what share of the total
31112 directory requests we should expect to see.
31113 - Use the TLS1 hostname extension to more closely resemble browser
31115 - Lots of new unit tests.
31116 - Add a macro to implement the common pattern of iterating through
31117 two parallel lists in lockstep.
31120 Changes in version 0.2.0.28-rc - 2008-06-13
31121 Tor 0.2.0.28-rc fixes an anonymity-related bug, fixes a hidden-service
31122 performance bug, and fixes a bunch of smaller bugs.
31125 - Fix a bug where, when we were choosing the 'end stream reason' to
31126 put in our relay end cell that we send to the exit relay, Tor
31127 clients on Windows were sometimes sending the wrong 'reason'. The
31128 anonymity problem is that exit relays may be able to guess whether
31129 the client is running Windows, thus helping partition the anonymity
31130 set. Down the road we should stop sending reasons to exit relays,
31131 or otherwise prevent future versions of this bug.
31134 - While setting up a hidden service, some valid introduction circuits
31135 were overlooked and abandoned. This might be the reason for
31136 the long delay in making a hidden service available. Bugfix on
31140 - Update to the "June 9 2008" ip-to-country file.
31141 - Run 'make test' as part of 'make dist', so we stop releasing so
31142 many development snapshots that fail their unit tests.
31145 - When we're checking if we have enough dir info for each relay
31146 to begin establishing circuits, make sure that we actually have
31147 the descriptor listed in the consensus, not just any descriptor.
31149 - Bridge relays no longer print "xx=0" in their extrainfo document
31150 for every single country code in the geoip db. Bugfix on
31152 - Only warn when we fail to load the geoip file if we were planning to
31153 include geoip stats in our extrainfo document. Bugfix on 0.2.0.27-rc.
31154 - If we change our MaxAdvertisedBandwidth and then reload torrc,
31155 Tor won't realize it should publish a new relay descriptor. Fixes
31156 bug 688, reported by mfr. Bugfix on 0.1.2.x.
31157 - When we haven't had any application requests lately, don't bother
31158 logging that we have expired a bunch of descriptors. Bugfix
31160 - Make relay cells written on a connection count as non-padding when
31161 tracking how long a connection has been in use. Bugfix on
31162 0.2.0.1-alpha. Spotted by lodger.
31163 - Fix unit tests in 0.2.0.27-rc.
31164 - Fix compile on Windows.
31167 Changes in version 0.2.0.27-rc - 2008-06-03
31168 Tor 0.2.0.27-rc adds a few features we left out of the earlier
31169 release candidates. In particular, we now include an IP-to-country
31170 GeoIP database, so controllers can easily look up what country a
31171 given relay is in, and so bridge relays can give us some sanitized
31172 summaries about which countries are making use of bridges. (See proposal
31173 126-geoip-fetching.txt for details.)
31176 - Include an IP-to-country GeoIP file in the tarball, so bridge
31177 relays can report sanitized summaries of the usage they're seeing.
31180 - Add a "PURPOSE=" argument to "STREAM NEW" events, as suggested by
31181 Robert Hogan. Fixes the first part of bug 681.
31182 - Make bridge authorities never serve extrainfo docs.
31183 - Add support to detect Libevent versions in the 1.4.x series
31185 - Fix build on gcc 4.3 with --enable-gcc-warnings set.
31186 - Include a new contrib/tor-exit-notice.html file that exit relay
31187 operators can put on their website to help reduce abuse queries.
31190 - When tunneling an encrypted directory connection, and its first
31191 circuit fails, do not leave it unattached and ask the controller
31192 to deal. Fixes the second part of bug 681.
31193 - Make bridge authorities correctly expire old extrainfo documents
31197 Changes in version 0.2.0.26-rc - 2008-05-13
31198 Tor 0.2.0.26-rc fixes a major security vulnerability caused by a bug
31199 in Debian's OpenSSL packages. All users running any 0.2.0.x version
31200 should upgrade, whether they're running Debian or not.
31202 o Major security fixes:
31203 - Use new V3 directory authority keys on the tor26, gabelmoo, and
31204 moria1 V3 directory authorities. The old keys were generated with
31205 a vulnerable version of Debian's OpenSSL package, and must be
31206 considered compromised. Other authorities' keys were not generated
31207 with an affected version of OpenSSL.
31210 - List authority signatures as "unrecognized" based on DirServer
31211 lines, not on cert cache. Bugfix on 0.2.0.x.
31214 - Add a new V3AuthUseLegacyKey option to make it easier for
31215 authorities to change their identity keys if they have to.
31218 Changes in version 0.2.0.25-rc - 2008-04-23
31219 Tor 0.2.0.25-rc makes Tor work again on OS X and certain BSDs.
31222 - Remember to initialize threading before initializing logging.
31223 Otherwise, many BSD-family implementations will crash hard on
31224 startup. Fixes bug 671. Bugfix on 0.2.0.24-rc.
31227 - Authorities correctly free policies on bad servers on
31228 exit. Fixes bug 672. Bugfix on 0.2.0.x.
31231 Changes in version 0.2.0.24-rc - 2008-04-22
31232 Tor 0.2.0.24-rc adds dizum (run by Alex de Joode) as the new sixth
31233 v3 directory authority, makes relays with dynamic IP addresses and no
31234 DirPort notice more quickly when their IP address changes, fixes a few
31235 rare crashes and memory leaks, and fixes a few other miscellaneous bugs.
31237 o New directory authorities:
31238 - Take lefkada out of the list of v3 directory authorities, since
31239 it has been down for months.
31240 - Set up dizum (run by Alex de Joode) as the new sixth v3 directory
31244 - Detect address changes more quickly on non-directory mirror
31245 relays. Bugfix on 0.2.0.18-alpha; fixes bug 652.
31247 o Minor features (security):
31248 - Reject requests for reverse-dns lookup of names that are in
31249 a private address space. Patch from lodger.
31250 - Non-exit relays no longer allow DNS requests. Fixes bug 619. Patch
31253 o Minor bugfixes (crashes):
31254 - Avoid a rare assert that can trigger when Tor doesn't have much
31255 directory information yet and it tries to fetch a v2 hidden
31256 service descriptor. Fixes bug 651, reported by nwf.
31257 - Initialize log mutex before initializing dmalloc. Otherwise,
31258 running with dmalloc would crash. Bugfix on 0.2.0.x-alpha.
31259 - Use recursive pthread mutexes in order to avoid deadlock when
31260 logging debug-level messages to a controller. Bug spotted by nwf,
31261 bugfix on 0.2.0.16-alpha.
31263 o Minor bugfixes (resource management):
31264 - Keep address policies from leaking memory: start their refcount
31265 at 1, not 2. Bugfix on 0.2.0.16-alpha.
31266 - Free authority certificates on exit, so they don't look like memory
31267 leaks. Bugfix on 0.2.0.19-alpha.
31268 - Free static hashtables for policy maps and for TLS connections on
31269 shutdown, so they don't look like memory leaks. Bugfix on 0.2.0.x.
31270 - Avoid allocating extra space when computing consensuses on 64-bit
31271 platforms. Bug spotted by aakova.
31273 o Minor bugfixes (misc):
31274 - Do not read the configuration file when we've only been told to
31275 generate a password hash. Fixes bug 643. Bugfix on 0.0.9pre5. Fix
31276 based on patch from Sebastian Hahn.
31277 - Exit relays that are used as a client can now reach themselves
31278 using the .exit notation, rather than just launching an infinite
31279 pile of circuits. Fixes bug 641. Reported by Sebastian Hahn.
31280 - When attempting to open a logfile fails, tell us why.
31281 - Fix a dumb bug that was preventing us from knowing that we should
31282 preemptively build circuits to handle expected directory requests.
31283 Fixes bug 660. Bugfix on 0.1.2.x.
31284 - Warn less verbosely about clock skew from netinfo cells from
31285 untrusted sources. Fixes bug 663.
31286 - Make controller stream events for DNS requests more consistent,
31287 by adding "new stream" events for DNS requests, and removing
31288 spurious "stream closed" events" for cached reverse resolves.
31289 Patch from mwenge. Fixes bug 646.
31290 - Correctly notify one-hop connections when a circuit build has
31291 failed. Possible fix for bug 669. Found by lodger.
31294 Changes in version 0.2.0.23-rc - 2008-03-24
31295 Tor 0.2.0.23-rc is the fourth release candidate for the 0.2.0 series. It
31296 makes bootstrapping faster if the first directory mirror you contact
31297 is down. The bundles also include the new Vidalia 0.1.2 release.
31300 - When a tunneled directory request is made to a directory server
31301 that's down, notice after 30 seconds rather than 120 seconds. Also,
31302 fail any begindir streams that are pending on it, so they can
31303 retry elsewhere. This was causing multi-minute delays on bootstrap.
31306 Changes in version 0.2.0.22-rc - 2008-03-18
31307 Tor 0.2.0.22-rc is the third release candidate for the 0.2.0 series. It
31308 enables encrypted directory connections by default for non-relays, fixes
31309 some broken TLS behavior we added in 0.2.0.20-rc, and resolves many
31310 other bugs. The bundles also include Vidalia 0.1.1 and Torbutton 1.1.17.
31313 - Enable encrypted directory connections by default for non-relays,
31314 so censor tools that block Tor directory connections based on their
31315 plaintext patterns will no longer work. This means Tor works in
31316 certain censored countries by default again.
31319 - Make sure servers always request certificates from clients during
31320 TLS renegotiation. Reported by lodger; bugfix on 0.2.0.20-rc.
31321 - Do not enter a CPU-eating loop when a connection is closed in
31322 the middle of client-side TLS renegotiation. Fixes bug 622. Bug
31323 diagnosed by lodger; bugfix on 0.2.0.20-rc.
31324 - Fix assertion failure that could occur when a blocked circuit
31325 became unblocked, and it had pending client DNS requests. Bugfix
31326 on 0.2.0.1-alpha. Fixes bug 632.
31328 o Minor bugfixes (on 0.1.2.x):
31329 - Generate "STATUS_SERVER" events rather than misspelled
31330 "STATUS_SEVER" events. Caught by mwenge.
31331 - When counting the number of bytes written on a TLS connection,
31332 look at the BIO actually used for writing to the network, not
31333 at the BIO used (sometimes) to buffer data for the network.
31334 Looking at different BIOs could result in write counts on the
31335 order of ULONG_MAX. Fixes bug 614.
31336 - On Windows, correctly detect errors when listing the contents of
31337 a directory. Fix from lodger.
31339 o Minor bugfixes (on 0.2.0.x):
31340 - Downgrade "sslv3 alert handshake failure" message to INFO.
31341 - If we set RelayBandwidthRate and RelayBandwidthBurst very high but
31342 left BandwidthRate and BandwidthBurst at the default, we would be
31343 silently limited by those defaults. Now raise them to match the
31344 RelayBandwidth* values.
31345 - Fix the SVK version detection logic to work correctly on a branch.
31346 - Make --enable-openbsd-malloc work correctly on Linux with alpha
31347 CPUs. Fixes bug 625.
31348 - Logging functions now check that the passed severity is sane.
31349 - Use proper log levels in the testsuite call of
31350 get_interface_address6().
31351 - When using a nonstandard malloc, do not use the platform values for
31352 HAVE_MALLOC_GOOD_SIZE or HAVE_MALLOC_USABLE_SIZE.
31353 - Make the openbsd malloc code use 8k pages on alpha CPUs and
31355 - Detect mismatched page sizes when using --enable-openbsd-malloc.
31356 - Avoid double-marked-for-close warning when certain kinds of invalid
31357 .in-addr.arpa addresses are passed to the DNSPort. Part of a fix
31358 for bug 617. Bugfix on 0.2.0.1-alpha.
31359 - Make sure that the "NULL-means-reject *:*" convention is followed by
31360 all the policy manipulation functions, avoiding some possible crash
31361 bugs. Bug found by lodger. Bugfix on 0.2.0.16-alpha.
31362 - Fix the implementation of ClientDNSRejectInternalAddresses so that it
31363 actually works, and doesn't warn about every single reverse lookup.
31364 Fixes the other part of bug 617. Bugfix on 0.2.0.1-alpha.
31367 - Only log guard node status when guard node status has changed.
31368 - Downgrade the 3 most common "INFO" messages to "DEBUG". This will
31369 make "INFO" 75% less verbose.
31372 Changes in version 0.2.0.21-rc - 2008-03-02
31373 Tor 0.2.0.21-rc is the second release candidate for the 0.2.0 series. It
31374 makes Tor work well with Vidalia again, fixes a rare assert bug,
31375 and fixes a pair of more minor bugs. The bundles also include Vidalia
31376 0.1.0 and Torbutton 1.1.16.
31379 - The control port should declare that it requires password auth
31380 when HashedControlSessionPassword is set too. Patch from Matt Edman;
31381 bugfix on 0.2.0.20-rc. Fixes bug 615.
31382 - Downgrade assert in connection_buckets_decrement() to a log message.
31383 This may help us solve bug 614, and in any case will make its
31384 symptoms less severe. Bugfix on 0.2.0.20-rc. Reported by fredzupy.
31385 - We were sometimes miscounting the number of bytes read from the
31386 network, causing our rate limiting to not be followed exactly.
31387 Bugfix on 0.2.0.16-alpha. Reported by lodger.
31390 - Fix compilation with OpenSSL 0.9.8 and 0.9.8a. All other supported
31391 OpenSSL versions should have been working fine. Diagnosis and patch
31392 from lodger, Karsten Loesing, and Sebastian Hahn. Fixes bug 616.
31393 Bugfix on 0.2.0.20-rc.
31396 Changes in version 0.2.0.20-rc - 2008-02-24
31397 Tor 0.2.0.20-rc is the first release candidate for the 0.2.0 series. It
31398 makes more progress towards normalizing Tor's TLS handshake, makes
31399 hidden services work better again, helps relays bootstrap if they don't
31400 know their IP address, adds optional support for linking in openbsd's
31401 allocator or tcmalloc, allows really fast relays to scale past 15000
31402 sockets, and fixes a bunch of minor bugs reported by Veracode.
31405 - Enable the revised TLS handshake based on the one designed by
31406 Steven Murdoch in proposal 124, as revised in proposal 130. It
31407 includes version negotiation for OR connections as described in
31408 proposal 105. The new handshake is meant to be harder for censors
31409 to fingerprint, and it adds the ability to detect certain kinds of
31410 man-in-the-middle traffic analysis attacks. The version negotiation
31411 feature will allow us to improve Tor's link protocol more safely
31413 - Choose which bridge to use proportional to its advertised bandwidth,
31414 rather than uniformly at random. This should speed up Tor for
31415 bridge users. Also do this for people who set StrictEntryNodes.
31416 - When a TrackHostExits-chosen exit fails too many times in a row,
31417 stop using it. Bugfix on 0.1.2.x; fixes bug 437.
31420 - Resolved problems with (re-)fetching hidden service descriptors.
31421 Patch from Karsten Loesing; fixes problems with 0.2.0.18-alpha
31422 and 0.2.0.19-alpha.
31423 - If we only ever used Tor for hidden service lookups or posts, we
31424 would stop building circuits and start refusing connections after
31425 24 hours, since we falsely believed that Tor was dormant. Reported
31426 by nwf; bugfix on 0.1.2.x.
31427 - Servers that don't know their own IP address should go to the
31428 authorities for their first directory fetch, even if their DirPort
31429 is off or if they don't know they're reachable yet. This will help
31430 them bootstrap better. Bugfix on 0.2.0.18-alpha; fixes bug 609.
31431 - When counting the number of open sockets, count not only the number
31432 of sockets we have received from the socket() call, but also
31433 the number we've gotten from accept() and socketpair(). This bug
31434 made us fail to count all sockets that we were using for incoming
31435 connections. Bugfix on 0.2.0.x.
31436 - Fix code used to find strings within buffers, when those strings
31437 are not in the first chunk of the buffer. Bugfix on 0.2.0.x.
31438 - Fix potential segfault when parsing HTTP headers. Bugfix on 0.2.0.x.
31439 - Add a new __HashedControlSessionPassword option for controllers
31440 to use for one-off session password hashes that shouldn't get
31441 saved to disk by SAVECONF --- Vidalia users were accumulating a
31442 pile of HashedControlPassword lines in their torrc files, one for
31443 each time they had restarted Tor and then clicked Save. Make Tor
31444 automatically convert "HashedControlPassword" to this new option but
31445 only when it's given on the command line. Partial fix for bug 586.
31447 o Minor features (performance):
31448 - Tune parameters for cell pool allocation to minimize amount of
31450 - Add OpenBSD malloc code from phk as an optional malloc
31451 replacement on Linux: some glibc libraries do very poorly
31452 with Tor's memory allocation patterns. Pass
31453 --enable-openbsd-malloc to get the replacement malloc code.
31454 - Add a --with-tcmalloc option to the configure script to link
31455 against tcmalloc (if present). Does not yet search for
31456 non-system include paths.
31457 - Stop imposing an arbitrary maximum on the number of file descriptors
31458 used for busy servers. Bug reported by Olaf Selke; patch from
31461 o Minor features (other):
31462 - When SafeLogging is disabled, log addresses along with all TLS
31464 - When building with --enable-gcc-warnings, check for whether Apple's
31465 warning "-Wshorten-64-to-32" is available.
31466 - Add a --passphrase-fd argument to the tor-gencert command for
31469 o Minor bugfixes (memory leaks and code problems):
31470 - We were leaking a file descriptor if Tor started with a zero-length
31471 cached-descriptors file. Patch by freddy77; bugfix on 0.1.2.
31472 - Detect size overflow in zlib code. Reported by Justin Ferguson and
31474 - We were comparing the raw BridgePassword entry with a base64'ed
31475 version of it, when handling a "/tor/networkstatus-bridges"
31476 directory request. Now compare correctly. Noticed by Veracode.
31477 - Recover from bad tracked-since value in MTBF-history file.
31478 Should fix bug 537.
31479 - Alter the code that tries to recover from unhandled write
31480 errors, to not try to flush onto a socket that's given us
31481 unhandled errors. Bugfix on 0.1.2.x.
31482 - Make Unix controlsockets work correctly on OpenBSD. Patch from
31483 tup. Bugfix on 0.2.0.3-alpha.
31485 o Minor bugfixes (other):
31486 - If we have an extra-info document for our server, always make
31487 it available on the control port, even if we haven't gotten
31488 a copy of it from an authority yet. Patch from mwenge.
31489 - Log the correct memory chunk sizes for empty RAM chunks in mempool.c.
31490 - Directory mirrors no longer include a guess at the client's IP
31491 address if the connection appears to be coming from the same /24
31492 network; it was producing too many wrong guesses.
31493 - Make the new hidden service code respect the SafeLogging setting.
31494 Bugfix on 0.2.0.x. Patch from Karsten.
31495 - When starting as an authority, do not overwrite all certificates
31496 cached from other authorities. Bugfix on 0.2.0.x. Fixes bug 606.
31497 - If we're trying to flush the last bytes on a connection (for
31498 example, when answering a directory request), reset the
31499 time-to-give-up timeout every time we manage to write something
31500 on the socket. Bugfix on 0.1.2.x.
31501 - Change the behavior of "getinfo status/good-server-descriptor"
31502 so it doesn't return failure when any authority disappears.
31503 - Even though the man page said that "TrackHostExits ." should
31504 work, nobody had ever implemented it. Bugfix on 0.1.0.x.
31505 - Report TLS "zero return" case as a "clean close" and "IO error"
31506 as a "close". Stop calling closes "unexpected closes": existing
31507 Tors don't use SSL_close(), so having a connection close without
31508 the TLS shutdown handshake is hardly unexpected.
31509 - Send NAMESERVER_STATUS messages for a single failed nameserver
31512 o Code simplifications and refactoring:
31513 - Remove the tor_strpartition function: its logic was confused,
31514 and it was only used for one thing that could be implemented far
31518 Changes in version 0.2.0.19-alpha - 2008-02-09
31519 Tor 0.2.0.19-alpha makes more progress towards normalizing Tor's TLS
31520 handshake, makes path selection for relays more secure and IP address
31521 guessing more robust, and generally fixes a lot of bugs in preparation
31522 for calling the 0.2.0 branch stable.
31525 - Do not include recognizeable strings in the commonname part of
31526 Tor's x509 certificates.
31529 - If we're a relay, avoid picking ourselves as an introduction point,
31530 a rendezvous point, or as the final hop for internal circuits. Bug
31531 reported by taranis and lodger. Bugfix on 0.1.2.x.
31532 - Patch from "Andrew S. Lists" to catch when we contact a directory
31533 mirror at IP address X and he says we look like we're coming from
31534 IP address X. Bugfix on 0.1.2.x.
31536 o Minor features (security):
31537 - Be more paranoid about overwriting sensitive memory on free(),
31538 as a defensive programming tactic to ensure forward secrecy.
31540 o Minor features (directory authority):
31541 - Actually validate the options passed to AuthDirReject,
31542 AuthDirInvalid, AuthDirBadDir, and AuthDirBadExit.
31543 - Reject router descriptors with out-of-range bandwidthcapacity or
31544 bandwidthburst values.
31546 o Minor features (controller):
31547 - Reject controller commands over 1MB in length. This keeps rogue
31548 processes from running us out of memory.
31550 o Minor features (misc):
31551 - Give more descriptive well-formedness errors for out-of-range
31552 hidden service descriptor/protocol versions.
31553 - Make memory debugging information describe more about history
31554 of cell allocation, so we can help reduce our memory use.
31556 o Deprecated features (controller):
31557 - The status/version/num-versioning and status/version/num-concurring
31558 GETINFO options are no longer useful in the v3 directory protocol:
31559 treat them as deprecated, and warn when they're used.
31562 - When our consensus networkstatus has been expired for a while, stop
31563 being willing to build circuits using it. Fixes bug 401. Bugfix
31565 - Directory caches now fetch certificates from all authorities
31566 listed in a networkstatus consensus, even when they do not
31567 recognize them. Fixes bug 571. Bugfix on 0.2.0.x.
31568 - When connecting to a bridge without specifying its key, insert
31569 the connection into the identity-to-connection map as soon as
31570 a key is learned. Fixes bug 574. Bugfix on 0.2.0.x.
31571 - Detect versions of OS X where malloc_good_size() is present in the
31572 library but never actually declared. Resolves bug 587. Bugfix
31574 - Stop incorrectly truncating zlib responses to directory authority
31575 signature download requests. Fixes bug 593. Bugfix on 0.2.0.x.
31576 - Stop recommending that every server operator send mail to tor-ops.
31577 Resolves bug 597. Bugfix on 0.1.2.x.
31578 - Don't trigger an assert if we start a directory authority with a
31579 private IP address (like 127.0.0.1).
31580 - Avoid possible failures when generating a directory with routers
31581 with over-long versions strings, or too many flags set. Bugfix
31583 - If an attempt to launch a DNS resolve request over the control
31584 port fails because we have overrun the limit on the number of
31585 connections, tell the controller that the request has failed.
31586 - Avoid using too little bandwidth when our clock skips a few
31587 seconds. Bugfix on 0.1.2.x.
31588 - Fix shell error when warning about missing packages in configure
31589 script, on Fedora or Red Hat machines. Bugfix on 0.2.0.x.
31590 - Do not become confused when receiving a spurious VERSIONS-like
31591 cell from a confused v1 client. Bugfix on 0.2.0.x.
31592 - Re-fetch v2 (as well as v0) rendezvous descriptors when all
31593 introduction points for a hidden service have failed. Patch from
31594 Karsten Loesing. Bugfix on 0.2.0.x.
31596 o Code simplifications and refactoring:
31597 - Remove some needless generality from cpuworker code, for improved
31599 - Stop overloading the circuit_t.onionskin field for both "onionskin
31600 from a CREATE cell that we are waiting for a cpuworker to be
31601 assigned" and "onionskin from an EXTEND cell that we are going to
31602 send to an OR as soon as we are connected". Might help with bug 600.
31603 - Add an in-place version of aes_crypt() so that we can avoid doing a
31604 needless memcpy() call on each cell payload.
31607 Changes in version 0.2.0.18-alpha - 2008-01-25
31608 Tor 0.2.0.18-alpha adds a sixth v3 directory authority run by CCC,
31609 fixes a big memory leak in 0.2.0.17-alpha, and adds new config options
31610 that can warn or reject connections to ports generally associated with
31611 vulnerable-plaintext protocols.
31613 o New directory authorities:
31614 - Set up dannenberg (run by CCC) as the sixth v3 directory
31618 - Fix a major memory leak when attempting to use the v2 TLS
31619 handshake code. Bugfix on 0.2.0.x; fixes bug 589.
31620 - We accidentally enabled the under-development v2 TLS handshake
31621 code, which was causing log entries like "TLS error while
31622 renegotiating handshake". Disable it again. Resolves bug 590.
31623 - We were computing the wrong Content-Length: header for directory
31624 responses that need to be compressed on the fly, causing clients
31625 asking for those items to always fail. Bugfix on 0.2.0.x; partially
31629 - Avoid going directly to the directory authorities even if you're a
31630 relay, if you haven't found yourself reachable yet or if you've
31631 decided not to advertise your dirport yet. Addresses bug 556.
31632 - If we've gone 12 hours since our last bandwidth check, and we
31633 estimate we have less than 50KB bandwidth capacity but we could
31634 handle more, do another bandwidth test.
31635 - New config options WarnPlaintextPorts and RejectPlaintextPorts so
31636 Tor can warn and/or refuse connections to ports commonly used with
31637 vulnerable-plaintext protocols. Currently we warn on ports 23,
31638 109, 110, and 143, but we don't reject any.
31641 - When we setconf ClientOnly to 1, close any current OR and Dir
31642 listeners. Reported by mwenge.
31643 - When we get a consensus that's been signed by more people than
31644 we expect, don't log about it; it's not a big deal. Reported
31648 - Don't answer "/tor/networkstatus-bridges" directory requests if
31649 the request isn't encrypted.
31650 - Make "ClientOnly 1" config option disable directory ports too.
31651 - Patches from Karsten Loesing to make v2 hidden services more
31652 robust: work even when there aren't enough HSDir relays available;
31653 retry when a v2 rend desc fetch fails; but don't retry if we
31654 already have a usable v0 rend desc.
31657 Changes in version 0.2.0.17-alpha - 2008-01-17
31658 Tor 0.2.0.17-alpha makes the tarball build cleanly again (whoops).
31661 - Make the tor-gencert man page get included correctly in the tarball.
31664 Changes in version 0.2.0.16-alpha - 2008-01-17
31665 Tor 0.2.0.16-alpha adds a fifth v3 directory authority run by Karsten
31666 Loesing, and generally cleans up a lot of features and minor bugs.
31668 o New directory authorities:
31669 - Set up gabelmoo (run by Karsten Loesing) as the fifth v3 directory
31672 o Major performance improvements:
31673 - Switch our old ring buffer implementation for one more like that
31674 used by free Unix kernels. The wasted space in a buffer with 1mb
31675 of data will now be more like 8k than 1mb. The new implementation
31676 also avoids realloc();realloc(); patterns that can contribute to
31677 memory fragmentation.
31680 - Configuration files now accept C-style strings as values. This
31681 helps encode characters not allowed in the current configuration
31682 file format, such as newline or #. Addresses bug 557.
31683 - Although we fixed bug 539 (where servers would send HTTP status 503
31684 responses _and_ send a body too), there are still servers out
31685 there that haven't upgraded. Therefore, make clients parse such
31686 bodies when they receive them.
31687 - When we're not serving v2 directory information, there is no reason
31688 to actually keep any around. Remove the obsolete files and directory
31689 on startup if they are very old and we aren't going to serve them.
31691 o Minor performance improvements:
31692 - Reference-count and share copies of address policy entries; only 5%
31693 of them were actually distinct.
31694 - Never walk through the list of logs if we know that no log is
31695 interested in a given message.
31698 - When an authority has not signed a consensus, do not try to
31699 download a nonexistent "certificate with key 00000000". Bugfix
31700 on 0.2.0.x. Fixes bug 569.
31701 - Fix a rare assert error when we're closing one of our threads:
31702 use a mutex to protect the list of logs, so we never write to the
31703 list as it's being freed. Bugfix on 0.1.2.x. Fixes the very rare
31704 bug 575, which is kind of the revenge of bug 222.
31705 - Patch from Karsten Loesing to complain less at both the client
31706 and the relay when a relay used to have the HSDir flag but doesn't
31707 anymore, and we try to upload a hidden service descriptor.
31708 - Stop leaking one cert per TLS context. Fixes bug 582. Bugfix on
31710 - Do not try to download missing certificates until we have tried
31711 to check our fallback consensus. Fixes bug 583.
31712 - Make bridges round reported GeoIP stats info up to the nearest
31713 estimate, not down. Now we can distinguish between "0 people from
31714 this country" and "1 person from this country".
31715 - Avoid a spurious free on base64 failure. Bugfix on 0.1.2.
31716 - Avoid possible segfault if key generation fails in
31717 crypto_pk_hybrid_encrypt. Bugfix on 0.2.0.
31718 - Avoid segfault in the case where a badly behaved v2 versioning
31719 directory sends a signed networkstatus with missing client-versions.
31721 - Avoid segfaults on certain complex invocations of
31722 router_get_by_hexdigest(). Bugfix on 0.1.2.
31723 - Correct bad index on array access in parse_http_time(). Bugfix
31725 - Fix possible bug in vote generation when server versions are present
31726 but client versions are not.
31727 - Fix rare bug on REDIRECTSTREAM control command when called with no
31728 port set: it could erroneously report an error when none had
31730 - Avoid bogus crash-prone, leak-prone tor_realloc when we're
31731 compressing large objects and find ourselves with more than 4k
31732 left over. Bugfix on 0.2.0.
31733 - Fix a small memory leak when setting up a hidden service.
31734 - Fix a few memory leaks that could in theory happen under bizarre
31736 - Fix an assert if we post a general-purpose descriptor via the
31737 control port but that descriptor isn't mentioned in our current
31738 network consensus. Bug reported by Jon McLachlan; bugfix on
31741 o Minor features (controller):
31742 - Get NS events working again. Patch from tup.
31743 - The GETCONF command now escapes and quotes configuration values
31744 that don't otherwise fit into the torrc file.
31745 - The SETCONF command now handles quoted values correctly.
31747 o Minor features (directory authorities):
31748 - New configuration options to override default maximum number of
31749 servers allowed on a single IP address. This is important for
31750 running a test network on a single host.
31751 - Actually implement the -s option to tor-gencert.
31752 - Add a manual page for tor-gencert.
31754 o Minor features (bridges):
31755 - Bridge authorities no longer serve bridge descriptors over
31756 unencrypted connections.
31758 o Minor features (other):
31759 - Add hidden services and DNSPorts to the list of things that make
31760 Tor accept that it has running ports. Change starting Tor with no
31761 ports from a fatal error to a warning; we might change it back if
31762 this turns out to confuse anybody. Fixes bug 579.
31765 Changes in version 0.1.2.19 - 2008-01-17
31766 Tor 0.1.2.19 fixes a huge memory leak on exit relays, makes the default
31767 exit policy a little bit more conservative so it's safer to run an
31768 exit relay on a home system, and fixes a variety of smaller issues.
31771 - Exit policies now reject connections that are addressed to a
31772 relay's public (external) IP address too, unless
31773 ExitPolicyRejectPrivate is turned off. We do this because too
31774 many relays are running nearby to services that trust them based
31775 on network address.
31778 - When the clock jumps forward a lot, do not allow the bandwidth
31779 buckets to become negative. Fixes bug 544.
31780 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
31781 on every successful resolve. Reported by Mike Perry.
31782 - Purge old entries from the "rephist" database and the hidden
31783 service descriptor database even when DirPort is zero.
31784 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
31785 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
31786 crashing or mis-answering these requests.
31787 - When we decide to send a 503 response to a request for servers, do
31788 not then also send the server descriptors: this defeats the whole
31789 purpose. Fixes bug 539.
31792 - Changing the ExitPolicyRejectPrivate setting should cause us to
31793 rebuild our server descriptor.
31794 - Fix handling of hex nicknames when answering controller requests for
31795 networkstatus by name, or when deciding whether to warn about
31796 unknown routers in a config option. (Patch from mwenge.)
31797 - Fix a couple of hard-to-trigger autoconf problems that could result
31798 in really weird results on platforms whose sys/types.h files define
31799 nonstandard integer types.
31800 - Don't try to create the datadir when running --verify-config or
31801 --hash-password. Resolves bug 540.
31802 - If we were having problems getting a particular descriptor from the
31803 directory caches, and then we learned about a new descriptor for
31804 that router, we weren't resetting our failure count. Reported
31806 - Although we fixed bug 539 (where servers would send HTTP status 503
31807 responses _and_ send a body too), there are still servers out there
31808 that haven't upgraded. Therefore, make clients parse such bodies
31809 when they receive them.
31810 - Run correctly on systems where rlim_t is larger than unsigned long.
31811 This includes some 64-bit systems.
31812 - Run correctly on platforms (like some versions of OS X 10.5) where
31813 the real limit for number of open files is OPEN_FILES, not rlim_max
31814 from getrlimit(RLIMIT_NOFILES).
31815 - Avoid a spurious free on base64 failure.
31816 - Avoid segfaults on certain complex invocations of
31817 router_get_by_hexdigest().
31818 - Fix rare bug on REDIRECTSTREAM control command when called with no
31819 port set: it could erroneously report an error when none had
31823 Changes in version 0.2.0.15-alpha - 2007-12-25
31824 Tor 0.2.0.14-alpha and 0.2.0.15-alpha fix a bunch of bugs with the
31825 features added in 0.2.0.13-alpha.
31828 - Fix several remotely triggerable asserts based on DirPort requests
31829 for a v2 or v3 networkstatus object before we were prepared. This
31830 was particularly bad for 0.2.0.13 and later bridge relays, who
31831 would never have a v2 networkstatus and would thus always crash
31832 when used. Bugfixes on 0.2.0.x.
31833 - Estimate the v3 networkstatus size more accurately, rather than
31834 estimating it at zero bytes and giving it artificially high priority
31835 compared to other directory requests. Bugfix on 0.2.0.x.
31838 - Fix configure.in logic for cross-compilation.
31839 - When we load a bridge descriptor from the cache, and it was
31840 previously unreachable, mark it as retriable so we won't just
31841 ignore it. Also, try fetching a new copy immediately. Bugfixes
31843 - The bridge GeoIP stats were counting other relays, for example
31844 self-reachability and authority-reachability tests.
31847 - Support compilation to target iPhone; patch from cjacker huang.
31848 To build for iPhone, pass the --enable-iphone option to configure.
31851 Changes in version 0.2.0.14-alpha - 2007-12-23
31853 - Fix a crash on startup if you install Tor 0.2.0.13-alpha fresh
31854 without a datadirectory from a previous Tor install. Reported
31856 - Fix a crash when we fetch a descriptor that turns out to be
31857 unexpected (it used to be in our networkstatus when we started
31858 fetching it, but it isn't in our current networkstatus), and we
31859 aren't using bridges. Bugfix on 0.2.0.x.
31860 - Fix a crash when accessing hidden services: it would work the first
31861 time you use a given introduction point for your service, but
31862 on subsequent requests we'd be using garbage memory. Fixed by
31863 Karsten Loesing. Bugfix on 0.2.0.13-alpha.
31864 - Fix a crash when we load a bridge descriptor from disk but we don't
31865 currently have a Bridge line for it in our torrc. Bugfix on
31869 - If bridge authorities set BridgePassword, they will serve a
31870 snapshot of known bridge routerstatuses from their DirPort to
31871 anybody who knows that password. Unset by default.
31874 - Make the unit tests build again.
31875 - Make "GETINFO/desc-annotations/id/<OR digest>" actually work.
31876 - Make PublishServerDescriptor default to 1, so the default doesn't
31877 have to change as we invent new directory protocol versions.
31878 - Fix test for rlim_t on OSX 10.3: sys/resource.h doesn't want to
31879 be included unless sys/time.h is already included. Fixes
31880 bug 553. Bugfix on 0.2.0.x.
31881 - If we receive a general-purpose descriptor and then receive an
31882 identical bridge-purpose descriptor soon after, don't discard
31883 the next one as a duplicate.
31886 - If BridgeRelay is set to 1, then the default for
31887 PublishServerDescriptor is now "bridge" rather than "v2,v3".
31888 - If the user sets RelayBandwidthRate but doesn't set
31889 RelayBandwidthBurst, then make them equal rather than erroring out.
31892 Changes in version 0.2.0.13-alpha - 2007-12-21
31893 Tor 0.2.0.13-alpha adds a fourth v3 directory authority run by Geoff
31894 Goodell, fixes many more bugs, and adds a lot of infrastructure for
31897 o New directory authorities:
31898 - Set up lefkada (run by Geoff Goodell) as the fourth v3 directory
31902 - Only update guard status (usable / not usable) once we have
31903 enough directory information. This was causing us to always pick
31904 two new guards on startup (bugfix on 0.2.0.9-alpha), and it was
31905 causing us to discard all our guards on startup if we hadn't been
31906 running for a few weeks (bugfix on 0.1.2.x). Fixes bug 448.
31907 - Purge old entries from the "rephist" database and the hidden
31908 service descriptor databases even when DirPort is zero. Bugfix
31910 - We were ignoring our RelayBandwidthRate for the first 30 seconds
31911 after opening a circuit -- even a relayed circuit. Bugfix on
31913 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
31914 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
31915 crashing or mis-answering these types of requests.
31916 - Relays were publishing their server descriptor to v1 and v2
31917 directory authorities, but they didn't try publishing to v3-only
31918 authorities. Fix this; and also stop publishing to v1 authorities.
31920 - When we were reading router descriptors from cache, we were ignoring
31921 the annotations -- so for example we were reading in bridge-purpose
31922 descriptors as general-purpose descriptors. Bugfix on 0.2.0.8-alpha.
31923 - When we decided to send a 503 response to a request for servers, we
31924 were then also sending the server descriptors: this defeats the
31925 whole purpose. Fixes bug 539; bugfix on 0.1.2.x.
31928 - Bridge relays now behave like clients with respect to time
31929 intervals for downloading new consensus documents -- otherwise they
31930 stand out. Bridge users now wait until the end of the interval,
31931 so their bridge relay will be sure to have a new consensus document.
31932 - Three new config options (AlternateDirAuthority,
31933 AlternateBridgeAuthority, and AlternateHSAuthority) that let the
31934 user selectively replace the default directory authorities by type,
31935 rather than the all-or-nothing replacement that DirServer offers.
31936 - Tor can now be configured to read a GeoIP file from disk in one
31937 of two formats. This can be used by controllers to map IP addresses
31938 to countries. Eventually, it may support exit-by-country.
31939 - When possible, bridge relays remember which countries users
31940 are coming from, and report aggregate information in their
31941 extra-info documents, so that the bridge authorities can learn
31942 where Tor is blocked.
31943 - Bridge directory authorities now do reachability testing on the
31944 bridges they know. They provide router status summaries to the
31945 controller via "getinfo ns/purpose/bridge", and also dump summaries
31946 to a file periodically.
31947 - Stop fetching directory info so aggressively if your DirPort is
31948 on but your ORPort is off; stop fetching v2 dir info entirely.
31949 You can override these choices with the new FetchDirInfoEarly
31953 - The fix in 0.2.0.12-alpha cleared the "hsdir" flag in v3 network
31954 consensus documents when there are too many relays at a single
31955 IP address. Now clear it in v2 network status documents too, and
31956 also clear it in routerinfo_t when the relay is no longer listed
31957 in the relevant networkstatus document.
31958 - Don't crash if we get an unexpected value for the
31959 PublishServerDescriptor config option. Reported by Matt Edman;
31960 bugfix on 0.2.0.9-alpha.
31961 - Our new v2 hidden service descriptor format allows descriptors
31962 that have no introduction points. But Tor crashed when we tried
31963 to build a descriptor with no intro points (and it would have
31964 crashed if we had tried to parse one). Bugfix on 0.2.0.x; patch
31965 by Karsten Loesing.
31966 - Fix building with dmalloc 5.5.2 with glibc.
31967 - Reject uploaded descriptors and extrainfo documents if they're
31968 huge. Otherwise we'll cache them all over the network and it'll
31969 clog everything up. Reported by Aljosha Judmayer.
31970 - Check for presence of s6_addr16 and s6_addr32 fields in in6_addr
31971 via autoconf. Should fix compile on solaris. Bugfix on 0.2.0.x.
31972 - When the DANGEROUS_VERSION controller status event told us we're
31973 running an obsolete version, it used the string "OLD" to describe
31974 it. Yet the "getinfo" interface used the string "OBSOLETE". Now use
31975 "OBSOLETE" in both cases. Bugfix on 0.1.2.x.
31976 - If we can't expand our list of entry guards (e.g. because we're
31977 using bridges or we have StrictEntryNodes set), don't mark relays
31978 down when they fail a directory request. Otherwise we're too quick
31979 to mark all our entry points down. Bugfix on 0.1.2.x.
31980 - Fix handling of hex nicknames when answering controller requests for
31981 networkstatus by name, or when deciding whether to warn about unknown
31982 routers in a config option. Bugfix on 0.1.2.x. (Patch from mwenge.)
31983 - Fix a couple of hard-to-trigger autoconf problems that could result
31984 in really weird results on platforms whose sys/types.h files define
31985 nonstandard integer types. Bugfix on 0.1.2.x.
31986 - Fix compilation with --disable-threads set. Bugfix on 0.2.0.x.
31987 - Don't crash on name lookup when we have no current consensus. Fixes
31988 bug 538; bugfix on 0.2.0.x.
31989 - Only Tors that want to mirror the v2 directory info should
31990 create the "cached-status" directory in their datadir. (All Tors
31991 used to create it.) Bugfix on 0.2.0.9-alpha.
31992 - Directory authorities should only automatically download Extra Info
31993 documents if they're v1, v2, or v3 authorities. Bugfix on 0.1.2.x.
31996 - On the USR1 signal, when dmalloc is in use, log the top 10 memory
31997 consumers. (We already do this on HUP.)
31998 - Authorities and caches fetch the v2 networkstatus documents
31999 less often, now that v3 is encouraged.
32000 - Add a new config option BridgeRelay that specifies you want to
32001 be a bridge relay. Right now the only difference is that it makes
32002 you answer begin_dir requests, and it makes you cache dir info,
32003 even if your DirPort isn't on.
32004 - Add "GETINFO/desc-annotations/id/<OR digest>" so controllers can
32005 ask about source, timestamp of arrival, purpose, etc. We need
32006 something like this to help Vidalia not do GeoIP lookups on bridge
32008 - Allow multiple HashedControlPassword config lines, to support
32009 multiple controller passwords.
32010 - Authorities now decide whether they're authoritative for a given
32011 router based on the router's purpose.
32012 - New config options AuthDirBadDir and AuthDirListBadDirs for
32013 authorities to mark certain relays as "bad directories" in the
32014 networkstatus documents. Also supports the "!baddir" directive in
32015 the approved-routers file.
32018 Changes in version 0.2.0.12-alpha - 2007-11-16
32019 This twelfth development snapshot fixes some more build problems as
32020 well as a few minor bugs.
32023 - Make it build on OpenBSD again. Patch from tup.
32024 - Substitute BINDIR and LOCALSTATEDIR in scripts. Fixes
32025 package-building for Red Hat, OS X, etc.
32027 o Minor bugfixes (on 0.1.2.x):
32028 - Changing the ExitPolicyRejectPrivate setting should cause us to
32029 rebuild our server descriptor.
32031 o Minor bugfixes (on 0.2.0.x):
32032 - When we're lacking a consensus, don't try to perform rendezvous
32033 operations. Reported by Karsten Loesing.
32034 - Fix a small memory leak whenever we decide against using a
32035 newly picked entry guard. Reported by Mike Perry.
32036 - When authorities detected more than two relays running on the same
32037 IP address, they were clearing all the status flags but forgetting
32038 to clear the "hsdir" flag. So clients were being told that a
32039 given relay was the right choice for a v2 hsdir lookup, yet they
32040 never had its descriptor because it was marked as 'not running'
32042 - If we're trying to fetch a bridge descriptor and there's no way
32043 the bridge authority could help us (for example, we don't know
32044 a digest, or there is no bridge authority), don't be so eager to
32045 fall back to asking the bridge authority.
32046 - If we're using bridges or have strictentrynodes set, and our
32047 chosen exit is in the same family as all our bridges/entry guards,
32048 then be flexible about families.
32051 - When we negotiate a v2 link-layer connection (not yet implemented),
32052 accept RELAY_EARLY cells and turn them into RELAY cells if we've
32053 negotiated a v1 connection for their next step. Initial code for
32057 Changes in version 0.2.0.11-alpha - 2007-11-12
32058 This eleventh development snapshot fixes some build problems with
32059 the previous snapshot. It also includes a more secure-by-default exit
32060 policy for relays, fixes an enormous memory leak for exit relays, and
32061 fixes another bug where servers were falling out of the directory list.
32064 - Exit policies now reject connections that are addressed to a
32065 relay's public (external) IP address too, unless
32066 ExitPolicyRejectPrivate is turned off. We do this because too
32067 many relays are running nearby to services that trust them based
32068 on network address. Bugfix on 0.1.2.x.
32071 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
32072 on every successful resolve. Reported by Mike Perry; bugfix
32074 - On authorities, never downgrade to old router descriptors simply
32075 because they're listed in the consensus. This created a catch-22
32076 where we wouldn't list a new descriptor because there was an
32077 old one in the consensus, and we couldn't get the new one in the
32078 consensus because we wouldn't list it. Possible fix for bug 548.
32079 Also, this might cause bug 543 to appear on authorities; if so,
32080 we'll need a band-aid for that. Bugfix on 0.2.0.9-alpha.
32082 o Packaging fixes on 0.2.0.10-alpha:
32083 - We were including instructions about what to do with the
32084 src/config/fallback-consensus file, but we weren't actually
32085 including it in the tarball. Disable all of that for now.
32088 - Allow people to say PreferTunnelledDirConns rather than
32089 PreferTunneledDirConns, for those alternate-spellers out there.
32092 - Don't reevaluate all the information from our consensus document
32093 just because we've downloaded a v2 networkstatus that we intend
32094 to cache. Fixes bug 545; bugfix on 0.2.0.x.
32097 Changes in version 0.2.0.10-alpha - 2007-11-10
32098 This tenth development snapshot adds a third v3 directory authority
32099 run by Mike Perry, adds most of Karsten Loesing's new hidden service
32100 descriptor format, fixes a bad crash bug and new bridge bugs introduced
32101 in 0.2.0.9-alpha, fixes many bugs with the v3 directory implementation,
32102 fixes some minor memory leaks in previous 0.2.0.x snapshots, and
32103 addresses many more minor issues.
32105 o New directory authorities:
32106 - Set up ides (run by Mike Perry) as the third v3 directory authority.
32109 - Allow tunnelled directory connections to ask for an encrypted
32110 "begin_dir" connection or an anonymized "uses a full Tor circuit"
32111 connection independently. Now we can make anonymized begin_dir
32112 connections for (e.g.) more secure hidden service posting and
32114 - More progress on proposal 114: code from Karsten Loesing to
32115 implement new hidden service descriptor format.
32116 - Raise the default BandwidthRate/BandwidthBurst to 5MB/10MB, to
32117 accommodate the growing number of servers that use the default
32118 and are reaching it.
32119 - Directory authorities use a new formula for selecting which nodes
32120 to advertise as Guards: they must be in the top 7/8 in terms of
32121 how long we have known about them, and above the median of those
32122 nodes in terms of weighted fractional uptime.
32123 - Make "not enough dir info yet" warnings describe *why* Tor feels
32124 it doesn't have enough directory info yet.
32127 - Stop servers from crashing if they set a Family option (or
32128 maybe in other situations too). Bugfix on 0.2.0.9-alpha; reported
32130 - Make bridge users work again -- the move to v3 directories in
32131 0.2.0.9-alpha had introduced a number of bugs that made bridges
32132 no longer work for clients.
32133 - When the clock jumps forward a lot, do not allow the bandwidth
32134 buckets to become negative. Bugfix on 0.1.2.x; fixes bug 544.
32136 o Major bugfixes (v3 dir, bugfixes on 0.2.0.9-alpha):
32137 - When the consensus lists a router descriptor that we previously were
32138 mirroring, but that we considered non-canonical, reload the
32139 descriptor as canonical. This fixes bug 543 where Tor servers
32140 would start complaining after a few days that they don't have
32141 enough directory information to build a circuit.
32142 - Consider replacing the current consensus when certificates arrive
32143 that make the pending consensus valid. Previously, we were only
32144 considering replacement when the new certs _didn't_ help.
32145 - Fix an assert error on startup if we didn't already have the
32146 consensus and certs cached in our datadirectory: we were caching
32147 the consensus in consensus_waiting_for_certs but then free'ing it
32149 - Avoid sending a request for "keys/fp" (for which we'll get a 400 Bad
32150 Request) if we need more v3 certs but we've already got pending
32151 requests for all of them.
32152 - Correctly back off from failing certificate downloads. Fixes
32154 - Authorities don't vote on the Running flag if they have been running
32155 for less than 30 minutes themselves. Fixes bug 547, where a newly
32156 started authority would vote that everyone was down.
32158 o New requirements:
32159 - Drop support for OpenSSL version 0.9.6. Just about nobody was using
32160 it, it had no AES, and it hasn't seen any security patches since
32164 - Clients now hold circuitless TLS connections open for 1.5 times
32165 MaxCircuitDirtiness (15 minutes), since it is likely that they'll
32166 rebuild a new circuit over them within that timeframe. Previously,
32167 they held them open only for KeepalivePeriod (5 minutes).
32168 - Use "If-Modified-Since" to avoid retrieving consensus
32169 networkstatuses that we already have.
32170 - When we have no consensus, check FallbackNetworkstatusFile (defaults
32171 to $PREFIX/share/tor/fallback-consensus) for a consensus. This way
32172 we start knowing some directory caches.
32173 - When we receive a consensus from the future, warn about skew.
32174 - Improve skew reporting: try to give the user a better log message
32175 about how skewed they are, and how much this matters.
32176 - When we have a certificate for an authority, believe that
32177 certificate's claims about the authority's IP address.
32178 - New --quiet command-line option to suppress the default console log.
32179 Good in combination with --hash-password.
32180 - Authorities send back an X-Descriptor-Not-New header in response to
32181 an accepted-but-discarded descriptor upload. Partially implements
32183 - Make the log message for "tls error. breaking." more useful.
32184 - Better log messages about certificate downloads, to attempt to
32185 track down the second incarnation of bug 546.
32187 o Minor features (bridges):
32188 - If bridge users set UpdateBridgesFromAuthority, but the digest
32189 they ask for is a 404 from the bridge authority, they now fall
32190 back to trying the bridge directly.
32191 - Bridges now use begin_dir to publish their server descriptor to
32192 the bridge authority, even when they haven't set TunnelDirConns.
32194 o Minor features (controller):
32195 - When reporting clock skew, and we know that the clock is _at least
32196 as skewed_ as some value, but we don't know the actual value,
32197 report the value as a "minimum skew."
32200 - Update linux-tor-prio.sh script to allow QoS based on the uid of
32201 the Tor process. Patch from Marco Bonetti with tweaks from Mike
32205 - Refuse to start if both ORPort and UseBridges are set. Bugfix
32206 on 0.2.0.x, suggested by Matt Edman.
32207 - Don't stop fetching descriptors when FetchUselessDescriptors is
32208 set, even if we stop asking for circuits. Bugfix on 0.1.2.x;
32209 reported by tup and ioerror.
32210 - Better log message on vote from unknown authority.
32211 - Don't log "Launching 0 request for 0 router" message.
32213 o Minor bugfixes (memory leaks):
32214 - Stop leaking memory every time we parse a v3 certificate. Bugfix
32216 - Stop leaking memory every time we load a v3 certificate. Bugfix
32217 on 0.2.0.1-alpha. Fixes bug 536.
32218 - Stop leaking a cached networkstatus on exit. Bugfix on
32220 - Stop leaking voter information every time we free a consensus.
32221 Bugfix on 0.2.0.3-alpha.
32222 - Stop leaking signed data every time we check a voter signature.
32223 Bugfix on 0.2.0.3-alpha.
32224 - Stop leaking a signature every time we fail to parse a consensus or
32225 a vote. Bugfix on 0.2.0.3-alpha.
32226 - Stop leaking v2_download_status_map on shutdown. Bugfix on
32228 - Stop leaking conn->nickname every time we make a connection to a
32229 Tor relay without knowing its expected identity digest (e.g. when
32230 using bridges). Bugfix on 0.2.0.3-alpha.
32232 - Minor bugfixes (portability):
32233 - Run correctly on platforms where rlim_t is larger than unsigned
32234 long, and/or where the real limit for number of open files is
32235 OPEN_FILES, not rlim_max from getrlimit(RLIMIT_NOFILES). In
32236 particular, these may be needed for OS X 10.5.
32239 Changes in version 0.1.2.18 - 2007-10-28
32240 Tor 0.1.2.18 fixes many problems including crash bugs, problems with
32241 hidden service introduction that were causing huge delays, and a big
32242 bug that was causing some servers to disappear from the network status
32243 lists for a few hours each day.
32245 o Major bugfixes (crashes):
32246 - If a connection is shut down abruptly because of something that
32247 happened inside connection_flushed_some(), do not call
32248 connection_finished_flushing(). Should fix bug 451:
32249 "connection_stop_writing: Assertion conn->write_event failed"
32250 Bugfix on 0.1.2.7-alpha.
32251 - Fix possible segfaults in functions called from
32252 rend_process_relay_cell().
32254 o Major bugfixes (hidden services):
32255 - Hidden services were choosing introduction points uniquely by
32256 hexdigest, but when constructing the hidden service descriptor
32257 they merely wrote the (potentially ambiguous) nickname.
32258 - Clients now use the v2 intro format for hidden service
32259 connections: they specify their chosen rendezvous point by identity
32260 digest rather than by (potentially ambiguous) nickname. These
32261 changes could speed up hidden service connections dramatically.
32263 o Major bugfixes (other):
32264 - Stop publishing a new server descriptor just because we get a
32265 HUP signal. This led (in a roundabout way) to some servers getting
32266 dropped from the networkstatus lists for a few hours each day.
32267 - When looking for a circuit to cannibalize, consider family as well
32268 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
32269 circuit cannibalization).
32270 - When a router wasn't listed in a new networkstatus, we were leaving
32271 the flags for that router alone -- meaning it remained Named,
32272 Running, etc -- even though absence from the networkstatus means
32273 that it shouldn't be considered to exist at all anymore. Now we
32274 clear all the flags for routers that fall out of the networkstatus
32275 consensus. Fixes bug 529.
32278 - Don't try to access (or alter) the state file when running
32279 --list-fingerprint or --verify-config or --hash-password. Resolves
32281 - When generating information telling us how to extend to a given
32282 router, do not try to include the nickname if it is
32283 absent. Resolves bug 467.
32284 - Fix a user-triggerable segfault in expand_filename(). (There isn't
32285 a way to trigger this remotely.)
32286 - When sending a status event to the controller telling it that an
32287 OR address is reachable, set the port correctly. (Previously we
32288 were reporting the dir port.)
32289 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
32290 command. Bugfix on 0.1.2.17.
32291 - When loading bandwidth history, do not believe any information in
32292 the future. Fixes bug 434.
32293 - When loading entry guard information, do not believe any information
32295 - When we have our clock set far in the future and generate an
32296 onion key, then re-set our clock to be correct, we should not stop
32297 the onion key from getting rotated.
32298 - On some platforms, accept() can return a broken address. Detect
32299 this more quietly, and deal accordingly. Fixes bug 483.
32300 - It's not actually an error to find a non-pending entry in the DNS
32301 cache when canceling a pending resolve. Don't log unless stuff
32302 is fishy. Resolves bug 463.
32303 - Don't reset trusted dir server list when we set a configuration
32304 option. Patch from Robert Hogan.
32305 - Don't try to create the datadir when running --verify-config or
32306 --hash-password. Resolves bug 540.
32309 Changes in version 0.2.0.9-alpha - 2007-10-24
32310 This ninth development snapshot switches clients to the new v3 directory
32311 system; allows servers to be listed in the network status even when they
32312 have the same nickname as a registered server; and fixes many other
32313 bugs including a big one that was causing some servers to disappear
32314 from the network status lists for a few hours each day.
32316 o Major features (directory system):
32317 - Clients now download v3 consensus networkstatus documents instead
32318 of v2 networkstatus documents. Clients and caches now base their
32319 opinions about routers on these consensus documents. Clients only
32320 download router descriptors listed in the consensus.
32321 - Authorities now list servers who have the same nickname as
32322 a different named server, but list them with a new flag,
32323 "Unnamed". Now we can list servers that happen to pick the same
32324 nickname as a server that registered two years ago and then
32325 disappeared. Partially implements proposal 122.
32326 - If the consensus lists a router as "Unnamed", the name is assigned
32327 to a different router: do not identify the router by that name.
32328 Partially implements proposal 122.
32329 - Authorities can now come to a consensus on which method to use to
32330 compute the consensus. This gives us forward compatibility.
32333 - Stop publishing a new server descriptor just because we HUP or
32334 when we find our DirPort to be reachable but won't actually publish
32335 it. New descriptors without any real changes are dropped by the
32336 authorities, and can screw up our "publish every 18 hours" schedule.
32338 - When a router wasn't listed in a new networkstatus, we were leaving
32339 the flags for that router alone -- meaning it remained Named,
32340 Running, etc -- even though absence from the networkstatus means
32341 that it shouldn't be considered to exist at all anymore. Now we
32342 clear all the flags for routers that fall out of the networkstatus
32343 consensus. Fixes bug 529; bugfix on 0.1.2.x.
32344 - Fix awful behavior in DownloadExtraInfo option where we'd fetch
32345 extrainfo documents and then discard them immediately for not
32346 matching the latest router. Bugfix on 0.2.0.1-alpha.
32348 o Minor features (v3 directory protocol):
32349 - Allow tor-gencert to generate a new certificate without replacing
32351 - Allow certificates to include an address.
32352 - When we change our directory-cache settings, reschedule all voting
32353 and download operations.
32354 - Reattempt certificate downloads immediately on failure, as long as
32355 we haven't failed a threshold number of times yet.
32356 - Delay retrying consensus downloads while we're downloading
32357 certificates to verify the one we just got. Also, count getting a
32358 consensus that we already have (or one that isn't valid) as a failure,
32359 and count failing to get the certificates after 20 minutes as a
32361 - Build circuits and download descriptors even if our consensus is a
32362 little expired. (This feature will go away once authorities are
32365 o Minor features (router descriptor cache):
32366 - If we find a cached-routers file that's been sitting around for more
32367 than 28 days unmodified, then most likely it's a leftover from
32368 when we upgraded to 0.2.0.8-alpha. Remove it. It has no good
32370 - When we (as a cache) download a descriptor because it was listed
32371 in a consensus, remember when the consensus was supposed to expire,
32372 and don't expire the descriptor until then.
32374 o Minor features (performance):
32375 - Call routerlist_remove_old_routers() much less often. This should
32376 speed startup, especially on directory caches.
32377 - Don't try to launch new descriptor downloads quite so often when we
32378 already have enough directory information to build circuits.
32379 - Base64 decoding was actually showing up on our profile when parsing
32380 the initial descriptor file; switch to an in-process all-at-once
32381 implementation that's about 3.5x times faster than calling out to
32384 o Minor features (compilation):
32385 - Detect non-ASCII platforms (if any still exist) and refuse to
32386 build there: some of our code assumes that 'A' is 65 and so on.
32388 o Minor bugfixes (v3 directory authorities, bugfixes on 0.2.0.x):
32389 - Make the "next period" votes into "current period" votes immediately
32390 after publishing the consensus; avoid a heisenbug that made them
32391 stick around indefinitely.
32392 - When we discard a vote as a duplicate, do not report this as
32394 - Treat missing v3 keys or certificates as an error when running as a
32395 v3 directory authority.
32396 - When we're configured to be a v3 authority, but we're only listed
32397 as a non-v3 authority in our DirServer line for ourself, correct
32399 - If an authority doesn't have a qualified hostname, just put
32400 its address in the vote. This fixes the problem where we referred to
32401 "moria on moria:9031."
32402 - Distinguish between detached signatures for the wrong period, and
32403 detached signatures for a divergent vote.
32404 - Fix a small memory leak when computing a consensus.
32405 - When there's no consensus, we were forming a vote every 30
32406 minutes, but writing the "valid-after" line in our vote based
32407 on our configured V3AuthVotingInterval: so unless the intervals
32408 matched up, we immediately rejected our own vote because it didn't
32409 start at the voting interval that caused us to construct a vote.
32411 o Minor bugfixes (v3 directory protocol, bugfixes on 0.2.0.x):
32412 - Delete unverified-consensus when the real consensus is set.
32413 - Consider retrying a consensus networkstatus fetch immediately
32414 after one fails: don't wait 60 seconds to notice.
32415 - When fetching a consensus as a cache, wait until a newer consensus
32416 should exist before trying to replace the current one.
32417 - Use a more forgiving schedule for retrying failed consensus
32418 downloads than for other types.
32420 o Minor bugfixes (other directory issues):
32421 - Correct the implementation of "download votes by digest." Bugfix on
32423 - Authorities no longer send back "400 you're unreachable please fix
32424 it" errors to Tor servers that aren't online all the time. We're
32425 supposed to tolerate these servers now. Bugfix on 0.1.2.x.
32427 o Minor bugfixes (controller):
32428 - Don't reset trusted dir server list when we set a configuration
32429 option. Patch from Robert Hogan; bugfix on 0.1.2.x.
32430 - Respond to INT and TERM SIGNAL commands before we execute the
32431 signal, in case the signal shuts us down. We had a patch in
32432 0.1.2.1-alpha that tried to do this by queueing the response on
32433 the connection's buffer before shutting down, but that really
32434 isn't the same thing at all. Bug located by Matt Edman.
32436 o Minor bugfixes (misc):
32437 - Correctly check for bad options to the "PublishServerDescriptor"
32438 config option. Bugfix on 0.2.0.1-alpha; reported by Matt Edman.
32439 - Stop leaking memory on failing case of base32_decode, and make
32440 it accept upper-case letters. Bugfixes on 0.2.0.7-alpha.
32441 - Don't try to download extrainfo documents when we're trying to
32442 fetch enough directory info to build a circuit: having enough
32443 info should get priority. Bugfix on 0.2.0.x.
32444 - Don't complain that "your server has not managed to confirm that its
32445 ports are reachable" if we haven't been able to build any circuits
32446 yet. Bug found by spending four hours without a v3 consensus. Bugfix
32448 - Detect the reason for failing to mmap a descriptor file we just
32449 wrote, and give a more useful log message. Fixes bug 533. Bugfix
32452 o Code simplifications and refactoring:
32453 - Remove support for the old bw_accounting file: we've been storing
32454 bandwidth accounting information in the state file since
32455 0.1.2.5-alpha. This may result in bandwidth accounting errors
32456 if you try to upgrade from 0.1.1.x or earlier, or if you try to
32457 downgrade to 0.1.1.x or earlier.
32458 - New convenience code to locate a file within the DataDirectory.
32459 - Move non-authority functionality out of dirvote.c.
32460 - Refactor the arguments for router_pick_{directory_|trusteddir}server
32461 so that they all take the same named flags.
32464 - Include the "tor-ctrl.sh" bash script by Stefan Behte to provide
32465 Unix users an easy way to script their Tor process (e.g. by
32466 adjusting bandwidth based on the time of the day).
32469 Changes in version 0.2.0.8-alpha - 2007-10-12
32470 This eighth development snapshot fixes a crash bug that's been bothering
32471 us since February 2007, lets bridge authorities store a list of bridge
32472 descriptors they've seen, gets v3 directory voting closer to working,
32473 starts caching v3 directory consensus documents on directory mirrors,
32474 and fixes a variety of smaller issues including some minor memory leaks.
32476 o Major features (router descriptor cache):
32477 - Store routers in a file called cached-descriptors instead of in
32478 cached-routers. Initialize cached-descriptors from cached-routers
32479 if the old format is around. The new format allows us to store
32480 annotations along with descriptors.
32481 - Use annotations to record the time we received each descriptor, its
32482 source, and its purpose.
32483 - Disable the SETROUTERPURPOSE controller command: it is now
32485 - Controllers should now specify cache=no or cache=yes when using
32486 the +POSTDESCRIPTOR command.
32487 - Bridge authorities now write bridge descriptors to disk, meaning
32488 we can export them to other programs and begin distributing them
32491 o Major features (directory authorities):
32492 - When a v3 authority is missing votes or signatures, it now tries
32494 - Directory authorities track weighted fractional uptime as well as
32495 weighted mean-time-between failures. WFU is suitable for deciding
32496 whether a node is "usually up", while MTBF is suitable for deciding
32497 whether a node is "likely to stay up." We need both, because
32498 "usually up" is a good requirement for guards, while "likely to
32499 stay up" is a good requirement for long-lived connections.
32501 o Major features (v3 directory system):
32502 - Caches now download v3 network status documents as needed,
32503 and download the descriptors listed in them.
32504 - All hosts now attempt to download and keep fresh v3 authority
32505 certificates, and re-attempt after failures.
32506 - More internal-consistency checks for vote parsing.
32508 o Major bugfixes (crashes):
32509 - If a connection is shut down abruptly because of something that
32510 happened inside connection_flushed_some(), do not call
32511 connection_finished_flushing(). Should fix bug 451. Bugfix on
32514 o Major bugfixes (performance):
32515 - Fix really bad O(n^2) performance when parsing a long list of
32516 routers: Instead of searching the entire list for an "extra-info "
32517 string which usually wasn't there, once for every routerinfo
32518 we read, just scan lines forward until we find one we like.
32520 - When we add data to a write buffer in response to the data on that
32521 write buffer getting low because of a flush, do not consider the
32522 newly added data as a candidate for immediate flushing, but rather
32523 make it wait until the next round of writing. Otherwise, we flush
32524 and refill recursively, and a single greedy TLS connection can
32525 eat all of our bandwidth. Bugfix on 0.1.2.7-alpha.
32527 o Minor features (v3 authority system):
32528 - Add more ways for tools to download the votes that lead to the
32530 - Send a 503 when low on bandwidth and a vote, consensus, or
32531 certificate is requested.
32532 - If-modified-since is now implemented properly for all kinds of
32533 certificate requests.
32535 o Minor bugfixes (network statuses):
32536 - Tweak the implementation of proposal 109 slightly: allow at most
32537 two Tor servers on the same IP address, except if it's the location
32538 of a directory authority, in which case allow five. Bugfix on
32541 o Minor bugfixes (controller):
32542 - When sending a status event to the controller telling it that an
32543 OR address is reachable, set the port correctly. (Previously we
32544 were reporting the dir port.) Bugfix on 0.1.2.x.
32546 o Minor bugfixes (v3 directory system):
32547 - Fix logic to look up a cert by its signing key digest. Bugfix on
32549 - Only change the reply to a vote to "OK" if it's not already
32550 set. This gets rid of annoying "400 OK" log messages, which may
32551 have been masking some deeper issue. Bugfix on 0.2.0.7-alpha.
32552 - When we get a valid consensus, recompute the voting schedule.
32553 - Base the valid-after time of a vote on the consensus voting
32554 schedule, not on our preferred schedule.
32555 - Make the return values and messages from signature uploads and
32556 downloads more sensible.
32557 - Fix a memory leak when serving votes and consensus documents, and
32558 another when serving certificates.
32560 o Minor bugfixes (performance):
32561 - Use a slightly simpler string hashing algorithm (copying Python's
32562 instead of Java's) and optimize our digest hashing algorithm to take
32563 advantage of 64-bit platforms and to remove some possibly-costly
32565 - Fix a minor memory leak whenever we parse guards from our state
32566 file. Bugfix on 0.2.0.7-alpha.
32567 - Fix a minor memory leak whenever we write out a file. Bugfix on
32569 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
32570 command. Bugfix on 0.2.0.5-alpha.
32572 o Minor bugfixes (portability):
32573 - On some platforms, accept() can return a broken address. Detect
32574 this more quietly, and deal accordingly. Fixes bug 483.
32575 - Stop calling tor_strlower() on uninitialized memory in some cases.
32576 Bugfix in 0.2.0.7-alpha.
32578 o Minor bugfixes (usability):
32579 - Treat some 403 responses from directory servers as INFO rather than
32580 WARN-severity events.
32581 - It's not actually an error to find a non-pending entry in the DNS
32582 cache when canceling a pending resolve. Don't log unless stuff is
32583 fishy. Resolves bug 463.
32585 o Minor bugfixes (anonymity):
32586 - Never report that we've used more bandwidth than we're willing to
32587 relay: it leaks how much non-relay traffic we're using. Resolves
32589 - When looking for a circuit to cannibalize, consider family as well
32590 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
32591 circuit cannibalization).
32593 o Code simplifications and refactoring:
32594 - Make a bunch of functions static. Remove some dead code.
32595 - Pull out about a third of the really big routerlist.c; put it in a
32596 new module, networkstatus.c.
32597 - Merge the extra fields in local_routerstatus_t back into
32598 routerstatus_t: we used to need one routerstatus_t for each
32599 authority's opinion, plus a local_routerstatus_t for the locally
32600 computed consensus opinion. To save space, we put the locally
32601 modified fields into local_routerstatus_t, and only the common
32602 stuff into routerstatus_t. But once v3 directories are in use,
32603 clients and caches will no longer need to hold authority opinions;
32604 thus, the rationale for keeping the types separate is now gone.
32605 - Make the code used to reschedule and reattempt downloads more
32607 - Turn all 'Are we a directory server/mirror?' logic into a call to
32609 - Remove the code to generate the oldest (v1) directory format.
32610 The code has been disabled since 0.2.0.5-alpha.
32613 Changes in version 0.2.0.7-alpha - 2007-09-21
32614 This seventh development snapshot makes bridges work again, makes bridge
32615 authorities work for the first time, fixes two huge performance flaws
32616 in hidden services, and fixes a variety of minor issues.
32618 o New directory authorities:
32619 - Set up moria1 and tor26 as the first v3 directory authorities. See
32620 doc/spec/dir-spec.txt for details on the new directory design.
32622 o Major bugfixes (crashes):
32623 - Fix possible segfaults in functions called from
32624 rend_process_relay_cell(). Bugfix on 0.1.2.x.
32626 o Major bugfixes (bridges):
32627 - Fix a bug that made servers send a "404 Not found" in response to
32628 attempts to fetch their server descriptor. This caused Tor servers
32629 to take many minutes to establish reachability for their DirPort,
32630 and it totally crippled bridges. Bugfix on 0.2.0.5-alpha.
32631 - Make "UpdateBridgesFromAuthority" torrc option work: when bridge
32632 users configure that and specify a bridge with an identity
32633 fingerprint, now they will lookup the bridge descriptor at the
32634 default bridge authority via a one-hop tunnel, but once circuits
32635 are established they will switch to a three-hop tunnel for later
32636 connections to the bridge authority. Bugfix in 0.2.0.3-alpha.
32638 o Major bugfixes (hidden services):
32639 - Hidden services were choosing introduction points uniquely by
32640 hexdigest, but when constructing the hidden service descriptor
32641 they merely wrote the (potentially ambiguous) nickname.
32642 - Clients now use the v2 intro format for hidden service
32643 connections: they specify their chosen rendezvous point by identity
32644 digest rather than by (potentially ambiguous) nickname. Both
32645 are bugfixes on 0.1.2.x, and they could speed up hidden service
32646 connections dramatically. Thanks to Karsten Loesing.
32648 o Minor features (security):
32649 - As a client, do not believe any server that tells us that an
32650 address maps to an internal address space.
32651 - Make it possible to enable HashedControlPassword and
32652 CookieAuthentication at the same time.
32654 o Minor features (guard nodes):
32655 - Tag every guard node in our state file with the version that
32656 we believe added it, or with our own version if we add it. This way,
32657 if a user temporarily runs an old version of Tor and then switches
32658 back to a new one, she doesn't automatically lose her guards.
32660 o Minor features (speed):
32661 - When implementing AES counter mode, update only the portions of the
32662 counter buffer that need to change, and don't keep separate
32663 network-order and host-order counters when they are the same (i.e.,
32664 on big-endian hosts.)
32666 o Minor features (controller):
32667 - Accept LF instead of CRLF on controller, since some software has a
32668 hard time generating real Internet newlines.
32669 - Add GETINFO values for the server status events
32670 "REACHABILITY_SUCCEEDED" and "GOOD_SERVER_DESCRIPTOR". Patch from
32673 o Removed features:
32674 - Routers no longer include bandwidth-history lines in their
32675 descriptors; this information is already available in extra-info
32676 documents, and including it in router descriptors took up 60%
32677 (!) of compressed router descriptor downloads. Completes
32678 implementation of proposal 104.
32679 - Remove the contrib scripts ExerciseServer.py, PathDemo.py,
32680 and TorControl.py, as they use the old v0 controller protocol,
32681 and are obsoleted by TorFlow anyway.
32682 - Drop support for v1 rendezvous descriptors, since we never used
32683 them anyway, and the code has probably rotted by now. Based on
32684 patch from Karsten Loesing.
32685 - On OSX, stop warning the user that kqueue support in libevent is
32686 "experimental", since it seems to have worked fine for ages.
32689 - When generating information telling us how to extend to a given
32690 router, do not try to include the nickname if it is absent. Fixes
32691 bug 467. Bugfix on 0.2.0.3-alpha.
32692 - Fix a user-triggerable (but not remotely-triggerable) segfault
32693 in expand_filename(). Bugfix on 0.1.2.x.
32694 - Fix a memory leak when freeing incomplete requests from DNSPort.
32695 Found by Niels Provos with valgrind. Bugfix on 0.2.0.1-alpha.
32696 - Don't try to access (or alter) the state file when running
32697 --list-fingerprint or --verify-config or --hash-password. (Resolves
32698 bug 499.) Bugfix on 0.1.2.x.
32699 - Servers used to decline to publish their DirPort if their
32700 BandwidthRate, RelayBandwidthRate, or MaxAdvertisedBandwidth
32701 were below a threshold. Now they only look at BandwidthRate and
32702 RelayBandwidthRate. Bugfix on 0.1.2.x.
32703 - Remove an optimization in the AES counter-mode code that assumed
32704 that the counter never exceeded 2^68. When the counter can be set
32705 arbitrarily as an IV (as it is by Karsten's new hidden services
32706 code), this assumption no longer holds. Bugfix on 0.1.2.x.
32707 - Resume listing "AUTHORITY" flag for authorities in network status.
32708 Bugfix on 0.2.0.3-alpha; reported by Alex de Joode.
32710 o Code simplifications and refactoring:
32711 - Revamp file-writing logic so we don't need to have the entire
32712 contents of a file in memory at once before we write to disk. Tor,
32714 - Turn "descriptor store" into a full-fledged type.
32715 - Move all NT services code into a separate source file.
32716 - Unify all code that computes medians, percentile elements, etc.
32717 - Get rid of a needless malloc when parsing address policies.
32720 Changes in version 0.1.2.17 - 2007-08-30
32721 Tor 0.1.2.17 features a new Vidalia version in the Windows and OS
32722 X bundles. Vidalia 0.0.14 makes authentication required for the
32723 ControlPort in the default configuration, which addresses important
32724 security risks. Everybody who uses Vidalia (or another controller)
32727 In addition, this Tor update fixes major load balancing problems with
32728 path selection, which should speed things up a lot once many people
32731 o Major bugfixes (security):
32732 - We removed support for the old (v0) control protocol. It has been
32733 deprecated since Tor 0.1.1.1-alpha, and keeping it secure has
32734 become more of a headache than it's worth.
32736 o Major bugfixes (load balancing):
32737 - When choosing nodes for non-guard positions, weight guards
32738 proportionally less, since they already have enough load. Patch
32740 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
32741 will allow fast Tor servers to get more attention.
32742 - When we're upgrading from an old Tor version, forget our current
32743 guards and pick new ones according to the new weightings. These
32744 three load balancing patches could raise effective network capacity
32745 by a factor of four. Thanks to Mike Perry for measurements.
32747 o Major bugfixes (stream expiration):
32748 - Expire not-yet-successful application streams in all cases if
32749 they've been around longer than SocksTimeout. Right now there are
32750 some cases where the stream will live forever, demanding a new
32751 circuit every 15 seconds. Fixes bug 454; reported by lodger.
32753 o Minor features (controller):
32754 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
32755 is valid before any authentication has been received. It tells
32756 a controller what kind of authentication is expected, and what
32757 protocol is spoken. Implements proposal 119.
32759 o Minor bugfixes (performance):
32760 - Save on most routerlist_assert_ok() calls in routerlist.c, thus
32761 greatly speeding up loading cached-routers from disk on startup.
32762 - Disable sentinel-based debugging for buffer code: we squashed all
32763 the bugs that this was supposed to detect a long time ago, and now
32764 its only effect is to change our buffer sizes from nice powers of
32765 two (which platform mallocs tend to like) to values slightly over
32766 powers of two (which make some platform mallocs sad).
32768 o Minor bugfixes (misc):
32769 - If exit bandwidth ever exceeds one third of total bandwidth, then
32770 use the correct formula to weight exit nodes when choosing paths.
32771 Based on patch from Mike Perry.
32772 - Choose perfectly fairly among routers when choosing by bandwidth and
32773 weighting by fraction of bandwidth provided by exits. Previously, we
32774 would choose with only approximate fairness, and correct ourselves
32775 if we ran off the end of the list.
32776 - If we require CookieAuthentication but we fail to write the
32777 cookie file, we would warn but not exit, and end up in a state
32778 where no controller could authenticate. Now we exit.
32779 - If we require CookieAuthentication, stop generating a new cookie
32780 every time we change any piece of our config.
32781 - Refuse to start with certain directory authority keys, and
32782 encourage people using them to stop.
32783 - Terminate multi-line control events properly. Original patch
32785 - Fix a minor memory leak when we fail to find enough suitable
32786 servers to choose a circuit.
32787 - Stop leaking part of the descriptor when we run into a particularly
32788 unparseable piece of it.
32791 Changes in version 0.2.0.6-alpha - 2007-08-26
32792 This sixth development snapshot features a new Vidalia version in the
32793 Windows and OS X bundles. Vidalia 0.0.14 makes authentication required for
32794 the ControlPort in the default configuration, which addresses important
32797 In addition, this snapshot fixes major load balancing problems
32798 with path selection, which should speed things up a lot once many
32799 people have upgraded. The directory authorities also use a new
32800 mean-time-between-failure approach to tracking which servers are stable,
32801 rather than just looking at the most recent uptime.
32803 o New directory authorities:
32804 - Set up Tonga as the default bridge directory authority.
32807 - Directory authorities now track servers by weighted
32808 mean-times-between-failures. When we have 4 or more days of data,
32809 use measured MTBF rather than declared uptime to decide whether
32810 to call a router Stable. Implements proposal 108.
32812 o Major bugfixes (load balancing):
32813 - When choosing nodes for non-guard positions, weight guards
32814 proportionally less, since they already have enough load. Patch
32816 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
32817 will allow fast Tor servers to get more attention.
32818 - When we're upgrading from an old Tor version, forget our current
32819 guards and pick new ones according to the new weightings. These
32820 three load balancing patches could raise effective network capacity
32821 by a factor of four. Thanks to Mike Perry for measurements.
32823 o Major bugfixes (descriptor parsing):
32824 - Handle unexpected whitespace better in malformed descriptors. Bug
32825 found using Benedikt Boss's new Tor fuzzer! Bugfix on 0.2.0.x.
32828 - There is now an ugly, temporary "desc/all-recent-extrainfo-hack"
32829 GETINFO for Torstat to use until it can switch to using extrainfos.
32830 - Optionally (if built with -DEXPORTMALLINFO) export the output
32831 of mallinfo via http, as tor/mallinfo.txt. Only accessible
32835 - Do not intermix bridge routers with controller-added
32836 routers. (Bugfix on 0.2.0.x)
32837 - Do not fail with an assert when accept() returns an unexpected
32838 address family. Addresses but does not wholly fix bug 483. (Bugfix
32840 - Let directory authorities startup even when they can't generate
32841 a descriptor immediately, e.g. because they don't know their
32843 - Stop putting the authentication cookie in a file called "0"
32844 in your working directory if you don't specify anything for the
32845 new CookieAuthFile option. Reported by Matt Edman.
32846 - Make it possible to read the PROTOCOLINFO response in a way that
32847 conforms to our control-spec. Reported by Matt Edman.
32848 - Fix a minor memory leak when we fail to find enough suitable
32849 servers to choose a circuit. Bugfix on 0.1.2.x.
32850 - Stop leaking part of the descriptor when we run into a particularly
32851 unparseable piece of it. Bugfix on 0.1.2.x.
32852 - Unmap the extrainfo cache file on exit.
32855 Changes in version 0.2.0.5-alpha - 2007-08-19
32856 This fifth development snapshot fixes compilation on Windows again;
32857 fixes an obnoxious client-side bug that slowed things down and put
32858 extra load on the network; gets us closer to using the v3 directory
32859 voting scheme; makes it easier for Tor controllers to use cookie-based
32860 authentication; and fixes a variety of other bugs.
32862 o Removed features:
32863 - Version 1 directories are no longer generated in full. Instead,
32864 authorities generate and serve "stub" v1 directories that list
32865 no servers. This will stop Tor versions 0.1.0.x and earlier from
32866 working, but (for security reasons) nobody should be running those
32869 o Major bugfixes (compilation, 0.2.0.x):
32870 - Try to fix Win32 compilation again: improve checking for IPv6 types.
32871 - Try to fix MSVC compilation: build correctly on platforms that do
32872 not define s6_addr16 or s6_addr32.
32873 - Fix compile on platforms without getaddrinfo: bug found by Li-Hui
32876 o Major bugfixes (stream expiration):
32877 - Expire not-yet-successful application streams in all cases if
32878 they've been around longer than SocksTimeout. Right now there are
32879 some cases where the stream will live forever, demanding a new
32880 circuit every 15 seconds. Bugfix on 0.1.2.7-alpha; fixes bug 454;
32881 reported by lodger.
32883 o Minor features (directory servers):
32884 - When somebody requests a list of statuses or servers, and we have
32885 none of those, return a 404 rather than an empty 200.
32887 o Minor features (directory voting):
32888 - Store v3 consensus status consensuses on disk, and reload them
32891 o Minor features (security):
32892 - Warn about unsafe ControlPort configurations.
32893 - Refuse to start with certain directory authority keys, and
32894 encourage people using them to stop.
32896 o Minor features (controller):
32897 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
32898 is valid before any authentication has been received. It tells
32899 a controller what kind of authentication is expected, and what
32900 protocol is spoken. Implements proposal 119.
32901 - New config option CookieAuthFile to choose a new location for the
32902 cookie authentication file, and config option
32903 CookieAuthFileGroupReadable to make it group-readable.
32905 o Minor features (unit testing):
32906 - Add command-line arguments to unit-test executable so that we can
32907 invoke any chosen test from the command line rather than having
32908 to run the whole test suite at once; and so that we can turn on
32909 logging for the unit tests.
32911 o Minor bugfixes (on 0.1.2.x):
32912 - If we require CookieAuthentication but we fail to write the
32913 cookie file, we would warn but not exit, and end up in a state
32914 where no controller could authenticate. Now we exit.
32915 - If we require CookieAuthentication, stop generating a new cookie
32916 every time we change any piece of our config.
32917 - When loading bandwidth history, do not believe any information in
32918 the future. Fixes bug 434.
32919 - When loading entry guard information, do not believe any information
32921 - When we have our clock set far in the future and generate an
32922 onion key, then re-set our clock to be correct, we should not stop
32923 the onion key from getting rotated.
32924 - Clean up torrc sample config file.
32925 - Do not automatically run configure from autogen.sh. This
32926 non-standard behavior tended to annoy people who have built other
32929 o Minor bugfixes (on 0.2.0.x):
32930 - Fix a bug with AutomapHostsOnResolve that would always cause
32931 the second request to fail. Bug reported by Kate. Bugfix on
32933 - Fix a bug in ADDRMAP controller replies that would sometimes
32934 try to print a NULL. Patch from tup.
32935 - Read v3 directory authority keys from the right location.
32936 - Numerous bugfixes to directory voting code.
32939 Changes in version 0.1.2.16 - 2007-08-01
32940 Tor 0.1.2.16 fixes a critical security vulnerability that allows a
32941 remote attacker in certain situations to rewrite the user's torrc
32942 configuration file. This can completely compromise anonymity of users
32943 in most configurations, including those running the Vidalia bundles,
32944 TorK, etc. Or worse.
32946 o Major security fixes:
32947 - Close immediately after missing authentication on control port;
32948 do not allow multiple authentication attempts.
32951 Changes in version 0.2.0.4-alpha - 2007-08-01
32952 This fourth development snapshot fixes a critical security vulnerability
32953 for most users, specifically those running Vidalia, TorK, etc. Everybody
32954 should upgrade to either 0.1.2.16 or 0.2.0.4-alpha.
32956 o Major security fixes:
32957 - Close immediately after missing authentication on control port;
32958 do not allow multiple authentication attempts.
32960 o Major bugfixes (compilation):
32961 - Fix win32 compilation: apparently IN_ADDR and IN6_ADDR are already
32964 o Minor features (performance):
32965 - Be even more aggressive about releasing RAM from small
32966 empty buffers. Thanks to our free-list code, this shouldn't be too
32967 performance-intensive.
32968 - Disable sentinel-based debugging for buffer code: we squashed all
32969 the bugs that this was supposed to detect a long time ago, and
32970 now its only effect is to change our buffer sizes from nice
32971 powers of two (which platform mallocs tend to like) to values
32972 slightly over powers of two (which make some platform mallocs sad).
32973 - Log malloc statistics from mallinfo() on platforms where it
32977 Changes in version 0.2.0.3-alpha - 2007-07-29
32978 This third development snapshot introduces new experimental
32979 blocking-resistance features and a preliminary version of the v3
32980 directory voting design, and includes many other smaller features
32984 - The first pieces of our "bridge" design for blocking-resistance
32985 are implemented. People can run bridge directory authorities;
32986 people can run bridges; and people can configure their Tor clients
32987 with a set of bridges to use as the first hop into the Tor network.
32988 See http://archives.seul.org/or/talk/Jul-2007/msg00249.html for
32990 - Create listener connections before we setuid to the configured
32991 User and Group. Now non-Windows users can choose port values
32992 under 1024, start Tor as root, and have Tor bind those ports
32993 before it changes to another UID. (Windows users could already
32995 - Added a new ConstrainedSockets config option to set SO_SNDBUF and
32996 SO_RCVBUF on TCP sockets. Hopefully useful for Tor servers running
32997 on "vserver" accounts. (Patch from coderman.)
32998 - Be even more aggressive about separating local traffic from relayed
32999 traffic when RelayBandwidthRate is set. (Refines proposal 111.)
33001 o Major features (experimental):
33002 - First cut of code for "v3 dir voting": directory authorities will
33003 vote on a common network status document rather than each publishing
33004 their own opinion. This code needs more testing and more corner-case
33005 handling before it's ready for use.
33008 - Directory authorities now call routers Fast if their bandwidth is
33009 at least 100KB/s, and consider their bandwidth adequate to be a
33010 Guard if it is at least 250KB/s, no matter the medians. This fix
33011 complements proposal 107. [Bugfix on 0.1.2.x]
33012 - Directory authorities now never mark more than 3 servers per IP as
33013 Valid and Running. (Implements proposal 109, by Kevin Bauer and
33015 - Minor change to organizationName and commonName generation
33016 procedures in TLS certificates during Tor handshakes, to invalidate
33017 some earlier censorware approaches. This is not a long-term
33018 solution, but applying it will give us a bit of time to look into
33019 the epidemiology of countermeasures as they spread.
33021 o Major bugfixes (directory):
33022 - Rewrite directory tokenization code to never run off the end of
33023 a string. Fixes bug 455. Patch from croup. [Bugfix on 0.1.2.x]
33025 o Minor features (controller):
33026 - Add a SOURCE_ADDR field to STREAM NEW events so that controllers can
33027 match requests to applications. (Patch from Robert Hogan.)
33028 - Report address and port correctly on connections to DNSPort. (Patch
33029 from Robert Hogan.)
33030 - Add a RESOLVE command to launch hostname lookups. (Original patch
33031 from Robert Hogan.)
33032 - Add GETINFO status/enough-dir-info to let controllers tell whether
33033 Tor has downloaded sufficient directory information. (Patch
33035 - You can now use the ControlSocket option to tell Tor to listen for
33036 controller connections on Unix domain sockets on systems that
33037 support them. (Patch from Peter Palfrader.)
33038 - STREAM NEW events are generated for DNSPort requests and for
33039 tunneled directory connections. (Patch from Robert Hogan.)
33040 - New "GETINFO address-mappings/*" command to get address mappings
33041 with expiry information. "addr-mappings/*" is now deprecated.
33044 o Minor features (misc):
33045 - Merge in some (as-yet-unused) IPv6 address manipulation code. (Patch
33047 - The tor-gencert tool for v3 directory authorities now creates all
33048 files as readable to the file creator only, and write-protects
33049 the authority identity key.
33050 - When dumping memory usage, list bytes used in buffer memory
33052 - When running with dmalloc, dump more stats on hup and on exit.
33053 - Directory authorities now fail quickly and (relatively) harmlessly
33054 if they generate a network status document that is somehow
33057 o Traffic load balancing improvements:
33058 - If exit bandwidth ever exceeds one third of total bandwidth, then
33059 use the correct formula to weight exit nodes when choosing paths.
33060 (Based on patch from Mike Perry.)
33061 - Choose perfectly fairly among routers when choosing by bandwidth and
33062 weighting by fraction of bandwidth provided by exits. Previously, we
33063 would choose with only approximate fairness, and correct ourselves
33064 if we ran off the end of the list. [Bugfix on 0.1.2.x]
33066 o Performance improvements:
33067 - Be more aggressive with freeing buffer RAM or putting it on the
33069 - Use Critical Sections rather than Mutexes for synchronizing threads
33070 on win32; Mutexes are heavier-weight, and designed for synchronizing
33073 o Deprecated and removed features:
33074 - RedirectExits is now deprecated.
33075 - Stop allowing address masks that do not correspond to bit prefixes.
33076 We have warned about these for a really long time; now it's time
33077 to reject them. (Patch from croup.)
33079 o Minor bugfixes (directory):
33080 - Fix another crash bug related to extra-info caching. (Bug found by
33081 Peter Palfrader.) [Bugfix on 0.2.0.2-alpha]
33082 - Directories no longer return a "304 not modified" when they don't
33083 have the networkstatus the client asked for. Also fix a memory
33084 leak when returning 304 not modified. [Bugfixes on 0.2.0.2-alpha]
33085 - We had accidentally labelled 0.1.2.x directory servers as not
33086 suitable for begin_dir requests, and had labelled no directory
33087 servers as suitable for uploading extra-info documents. [Bugfix
33090 o Minor bugfixes (dns):
33091 - Fix a crash when DNSPort is set more than once. (Patch from Robert
33092 Hogan.) [Bugfix on 0.2.0.2-alpha]
33093 - Add DNSPort connections to the global connection list, so that we
33094 can time them out correctly. (Bug found by Robert Hogan.) [Bugfix
33096 - Fix a dangling reference that could lead to a crash when DNSPort is
33097 changed or closed (Patch from Robert Hogan.) [Bugfix on
33100 o Minor bugfixes (controller):
33101 - Provide DNS expiry times in GMT, not in local time. For backward
33102 compatibility, ADDRMAP events only provide GMT expiry in an extended
33103 field. "GETINFO address-mappings" always does the right thing.
33104 - Use CRLF line endings properly in NS events.
33105 - Terminate multi-line control events properly. (Original patch
33106 from tup.) [Bugfix on 0.1.2.x-alpha]
33107 - Do not include spaces in SOURCE_ADDR fields in STREAM
33108 events. Resolves bug 472. [Bugfix on 0.2.0.x-alpha]
33111 Changes in version 0.1.2.15 - 2007-07-17
33112 Tor 0.1.2.15 fixes several crash bugs, fixes some anonymity-related
33113 problems, fixes compilation on BSD, and fixes a variety of other
33114 bugs. Everybody should upgrade.
33116 o Major bugfixes (compilation):
33117 - Fix compile on FreeBSD/NetBSD/OpenBSD. Oops.
33119 o Major bugfixes (crashes):
33120 - Try even harder not to dereference the first character after
33121 an mmap(). Reported by lodger.
33122 - Fix a crash bug in directory authorities when we re-number the
33123 routerlist while inserting a new router.
33124 - When the cached-routers file is an even multiple of the page size,
33125 don't run off the end and crash. (Fixes bug 455; based on idea
33127 - Fix eventdns.c behavior on Solaris: It is critical to include
33128 orconfig.h _before_ sys/types.h, so that we can get the expected
33129 definition of _FILE_OFFSET_BITS.
33131 o Major bugfixes (security):
33132 - Fix a possible buffer overrun when using BSD natd support. Bug
33134 - When sending destroy cells from a circuit's origin, don't include
33135 the reason for tearing down the circuit. The spec says we didn't,
33136 and now we actually don't. Reported by lodger.
33137 - Keep streamids from different exits on a circuit separate. This
33138 bug may have allowed other routers on a given circuit to inject
33139 cells into streams. Reported by lodger; fixes bug 446.
33140 - If there's a never-before-connected-to guard node in our list,
33141 never choose any guards past it. This way we don't expand our
33142 guard list unless we need to.
33144 o Minor bugfixes (guard nodes):
33145 - Weight guard selection by bandwidth, so that low-bandwidth nodes
33146 don't get overused as guards.
33148 o Minor bugfixes (directory):
33149 - Correctly count the number of authorities that recommend each
33150 version. Previously, we were under-counting by 1.
33151 - Fix a potential crash bug when we load many server descriptors at
33152 once and some of them make others of them obsolete. Fixes bug 458.
33154 o Minor bugfixes (hidden services):
33155 - Stop tearing down the whole circuit when the user asks for a
33156 connection to a port that the hidden service didn't configure.
33159 o Minor bugfixes (misc):
33160 - On Windows, we were preventing other processes from reading
33161 cached-routers while Tor was running. Reported by janbar.
33162 - Fix a possible (but very unlikely) bug in picking routers by
33163 bandwidth. Add a log message to confirm that it is in fact
33164 unlikely. Patch from lodger.
33165 - Backport a couple of memory leak fixes.
33166 - Backport miscellaneous cosmetic bugfixes.
33169 Changes in version 0.2.0.2-alpha - 2007-06-02
33170 o Major bugfixes on 0.2.0.1-alpha:
33171 - Fix an assertion failure related to servers without extra-info digests.
33172 Resolves bugs 441 and 442.
33174 o Minor features (directory):
33175 - Support "If-Modified-Since" when answering HTTP requests for
33176 directories, running-routers documents, and network-status documents.
33177 (There's no need to support it for router descriptors, since those
33178 are downloaded by descriptor digest.)
33180 o Minor build issues:
33181 - Clear up some MIPSPro compiler warnings.
33182 - When building from a tarball on a machine that happens to have SVK
33183 installed, report the micro-revision as whatever version existed
33184 in the tarball, not as "x".
33187 Changes in version 0.2.0.1-alpha - 2007-06-01
33188 This early development snapshot provides new features for people running
33189 Tor as both a client and a server (check out the new RelayBandwidth
33190 config options); lets Tor run as a DNS proxy; and generally moves us
33191 forward on a lot of fronts.
33193 o Major features, server usability:
33194 - New config options RelayBandwidthRate and RelayBandwidthBurst:
33195 a separate set of token buckets for relayed traffic. Right now
33196 relayed traffic is defined as answers to directory requests, and
33197 OR connections that don't have any local circuits on them.
33199 o Major features, client usability:
33200 - A client-side DNS proxy feature to replace the need for
33201 dns-proxy-tor: Just set "DNSPort 9999", and Tor will now listen
33202 for DNS requests on port 9999, use the Tor network to resolve them
33203 anonymously, and send the reply back like a regular DNS server.
33204 The code still only implements a subset of DNS.
33205 - Make PreferTunneledDirConns and TunnelDirConns work even when
33206 we have no cached directory info. This means Tor clients can now
33207 do all of their connections protected by TLS.
33209 o Major features, performance and efficiency:
33210 - Directory authorities accept and serve "extra info" documents for
33211 routers. These documents contain fields from router descriptors
33212 that aren't usually needed, and that use a lot of excess
33213 bandwidth. Once these fields are removed from router descriptors,
33214 the bandwidth savings should be about 60%. [Partially implements
33216 - Servers upload extra-info documents to any authority that accepts
33217 them. Authorities (and caches that have been configured to download
33218 extra-info documents) download them as needed. [Partially implements
33220 - Change the way that Tor buffers data that it is waiting to write.
33221 Instead of queueing data cells in an enormous ring buffer for each
33222 client->OR or OR->OR connection, we now queue cells on a separate
33223 queue for each circuit. This lets us use less slack memory, and
33224 will eventually let us be smarter about prioritizing different kinds
33226 - Use memory pools to allocate cells with better speed and memory
33227 efficiency, especially on platforms where malloc() is inefficient.
33228 - Stop reading on edge connections when their corresponding circuit
33229 buffers are full; start again as the circuits empty out.
33231 o Major features, other:
33232 - Add an HSAuthorityRecordStats option that hidden service authorities
33233 can use to track statistics of overall hidden service usage without
33234 logging information that would be very useful to an attacker.
33235 - Start work implementing multi-level keys for directory authorities:
33236 Add a standalone tool to generate key certificates. (Proposal 103.)
33239 - Directory authorities now call routers Stable if they have an
33240 uptime of at least 30 days, even if that's not the median uptime
33241 in the network. Implements proposal 107, suggested by Kevin Bauer
33244 o Minor fixes (resource management):
33245 - Count the number of open sockets separately from the number
33246 of active connection_t objects. This will let us avoid underusing
33247 our allocated connection limit.
33248 - We no longer use socket pairs to link an edge connection to an
33249 anonymous directory connection or a DirPort test connection.
33250 Instead, we track the link internally and transfer the data
33251 in-process. This saves two sockets per "linked" connection (at the
33252 client and at the server), and avoids the nasty Windows socketpair()
33254 - Keep unused 4k and 16k buffers on free lists, rather than wasting 8k
33255 for every single inactive connection_t. Free items from the
33256 4k/16k-buffer free lists when they haven't been used for a while.
33258 o Minor features (build):
33259 - Make autoconf search for libevent, openssl, and zlib consistently.
33260 - Update deprecated macros in configure.in.
33261 - When warning about missing headers, tell the user to let us
33262 know if the compile succeeds anyway, so we can downgrade the
33264 - Include the current subversion revision as part of the version
33265 string: either fetch it directly if we're in an SVN checkout, do
33266 some magic to guess it if we're in an SVK checkout, or use
33267 the last-detected version if we're building from a .tar.gz.
33268 Use this version consistently in log messages.
33270 o Minor features (logging):
33271 - Always prepend "Bug: " to any log message about a bug.
33272 - Put a platform string (e.g. "Linux i686") in the startup log
33273 message, so when people paste just their logs, we know if it's
33274 OpenBSD or Windows or what.
33275 - When logging memory usage, break down memory used in buffers by
33278 o Minor features (directory system):
33279 - New config option V2AuthoritativeDirectory that all directory
33280 authorities should set. This will let future authorities choose
33281 not to serve V2 directory information.
33282 - Directory authorities allow multiple router descriptors and/or extra
33283 info documents to be uploaded in a single go. This will make
33284 implementing proposal 104 simpler.
33286 o Minor features (controller):
33287 - Add a new config option __DisablePredictedCircuits designed for
33288 use by the controller, when we don't want Tor to build any circuits
33290 - Let the controller specify HOP=%d as an argument to ATTACHSTREAM,
33291 so we can exit from the middle of the circuit.
33292 - Implement "getinfo status/circuit-established".
33293 - Implement "getinfo status/version/..." so a controller can tell
33294 whether the current version is recommended, and whether any versions
33295 are good, and how many authorities agree. (Patch from shibz.)
33297 o Minor features (hidden services):
33298 - Allow multiple HiddenServicePort directives with the same virtual
33299 port; when they occur, the user is sent round-robin to one
33300 of the target ports chosen at random. Partially fixes bug 393 by
33301 adding limited ad-hoc round-robining.
33303 o Minor features (other):
33305 - Add a new AutomapHostsOnResolve option: when it is enabled, any
33306 resolve request for hosts matching a given pattern causes Tor to
33307 generate an internal virtual address mapping for that host. This
33308 allows DNSPort to work sensibly with hidden service users. By
33309 default, .exit and .onion addresses are remapped; the list of
33310 patterns can be reconfigured with AutomapHostsSuffixes.
33311 - Add an "-F" option to tor-resolve to force a resolve for a .onion
33312 address. Thanks to the AutomapHostsOnResolve option, this is no
33313 longer a completely silly thing to do.
33314 - If Tor is invoked from something that isn't a shell (e.g. Vidalia),
33315 now we expand "-f ~/.tor/torrc" correctly. Suggested by Matt Edman.
33316 - Treat "2gb" when given in torrc for a bandwidth as meaning 2gb,
33317 minus 1 byte: the actual maximum declared bandwidth.
33319 o Removed features:
33320 - Removed support for the old binary "version 0" controller protocol.
33321 This has been deprecated since 0.1.1, and warnings have been issued
33322 since 0.1.2. When we encounter a v0 control message, we now send
33323 back an error and close the connection.
33324 - Remove the old "dns worker" server DNS code: it hasn't been default
33325 since 0.1.2.2-alpha, and all the servers seem to be using the new
33328 o Minor bugfixes (portability):
33329 - Even though Windows is equally happy with / and \ as path separators,
33330 try to use \ consistently on Windows and / consistently on Unix: it
33331 makes the log messages nicer.
33332 - Correctly report platform name on Windows 95 OSR2 and Windows 98 SE.
33333 - Read resolv.conf files correctly on platforms where read() returns
33334 partial results on small file reads.
33336 o Minor bugfixes (directory):
33337 - Correctly enforce that elements of directory objects do not appear
33338 more often than they are allowed to appear.
33339 - When we are reporting the DirServer line we just parsed, we were
33340 logging the second stanza of the key fingerprint, not the first.
33342 o Minor bugfixes (logging):
33343 - When we hit an EOF on a log (probably because we're shutting down),
33344 don't try to remove the log from the list: just mark it as
33345 unusable. (Bulletproofs against bug 222.)
33347 o Minor bugfixes (other):
33348 - In the exitlist script, only consider the most recently published
33349 server descriptor for each server. Also, when the user requests
33350 a list of servers that _reject_ connections to a given address,
33351 explicitly exclude the IPs that also have servers that accept
33352 connections to that address. (Resolves bug 405.)
33353 - Stop allowing hibernating servers to be "stable" or "fast".
33354 - On Windows, we were preventing other processes from reading
33355 cached-routers while Tor was running. (Reported by janbar)
33356 - Make the NodeFamilies config option work. (Reported by
33357 lodger -- it has never actually worked, even though we added it
33359 - Check return values from pthread_mutex functions.
33360 - Don't save non-general-purpose router descriptors to the disk cache,
33361 because we have no way of remembering what their purpose was when
33363 - Add even more asserts to hunt down bug 417.
33364 - Build without verbose warnings even on (not-yet-released) gcc 4.2.
33365 - Fix a possible (but very unlikely) bug in picking routers by bandwidth.
33366 Add a log message to confirm that it is in fact unlikely.
33368 o Minor bugfixes (controller):
33369 - Make 'getinfo fingerprint' return a 551 error if we're not a
33370 server, so we match what the control spec claims we do. Reported
33372 - Fix a typo in an error message when extendcircuit fails that
33373 caused us to not follow the \r\n-based delimiter protocol. Reported
33376 o Code simplifications and refactoring:
33377 - Stop passing around circuit_t and crypt_path_t pointers that are
33378 implicit in other procedure arguments.
33379 - Drop the old code to choke directory connections when the
33380 corresponding OR connections got full: thanks to the cell queue
33381 feature, OR conns don't get full any more.
33382 - Make dns_resolve() handle attaching connections to circuits
33383 properly, so the caller doesn't have to.
33384 - Rename wants_to_read and wants_to_write to read/write_blocked_on_bw.
33385 - Keep the connection array as a dynamic smartlist_t, rather than as
33386 a fixed-sized array. This is important, as the number of connections
33387 is becoming increasingly decoupled from the number of sockets.
33390 Changes in version 0.1.2.14 - 2007-05-25
33391 Tor 0.1.2.14 changes the addresses of two directory authorities (this
33392 change especially affects those who serve or use hidden services),
33393 and fixes several other crash- and security-related bugs.
33395 o Directory authority changes:
33396 - Two directory authorities (moria1 and moria2) just moved to new
33397 IP addresses. This change will particularly affect those who serve
33398 or use hidden services.
33400 o Major bugfixes (crashes):
33401 - If a directory server runs out of space in the connection table
33402 as it's processing a begin_dir request, it will free the exit stream
33403 but leave it attached to the circuit, leading to unpredictable
33404 behavior. (Reported by seeess, fixes bug 425.)
33405 - Fix a bug in dirserv_remove_invalid() that would cause authorities
33406 to corrupt memory under some really unlikely scenarios.
33407 - Tighten router parsing rules. (Bugs reported by Benedikt Boss.)
33408 - Avoid segfaults when reading from mmaped descriptor file. (Reported
33411 o Major bugfixes (security):
33412 - When choosing an entry guard for a circuit, avoid using guards
33413 that are in the same family as the chosen exit -- not just guards
33414 that are exactly the chosen exit. (Reported by lodger.)
33416 o Major bugfixes (resource management):
33417 - If a directory authority is down, skip it when deciding where to get
33418 networkstatus objects or descriptors. Otherwise we keep asking
33419 every 10 seconds forever. Fixes bug 384.
33420 - Count it as a failure if we fetch a valid network-status but we
33421 don't want to keep it. Otherwise we'll keep fetching it and keep
33422 not wanting to keep it. Fixes part of bug 422.
33423 - If all of our dirservers have given us bad or no networkstatuses
33424 lately, then stop hammering them once per minute even when we
33425 think they're failed. Fixes another part of bug 422.
33428 - Actually set the purpose correctly for descriptors inserted with
33429 purpose=controller.
33430 - When we have k non-v2 authorities in our DirServer config,
33431 we ignored the last k authorities in the list when updating our
33433 - Correctly back-off from requesting router descriptors that we are
33434 having a hard time downloading.
33435 - Read resolv.conf files correctly on platforms where read() returns
33436 partial results on small file reads.
33437 - Don't rebuild the entire router store every time we get 32K of
33438 routers: rebuild it when the journal gets very large, or when
33439 the gaps in the store get very large.
33442 - When routers publish SVN revisions in their router descriptors,
33443 authorities now include those versions correctly in networkstatus
33445 - Warn when using a version of libevent before 1.3b to run a server on
33446 OSX or BSD: these versions interact badly with userspace threads.
33449 Changes in version 0.1.2.13 - 2007-04-24
33450 This release features some major anonymity fixes, such as safer path
33451 selection; better client performance; faster bootstrapping, better
33452 address detection, and better DNS support for servers; write limiting as
33453 well as read limiting to make servers easier to run; and a huge pile of
33454 other features and bug fixes. The bundles also ship with Vidalia 0.0.11.
33456 Tor 0.1.2.13 is released in memory of Rob Levin (1955-2006), aka lilo
33457 of the Freenode IRC network, remembering his patience and vision for
33458 free speech on the Internet.
33461 - Fix a memory leak when we ask for "all" networkstatuses and we
33462 get one we don't recognize.
33463 - Add more asserts to hunt down bug 417.
33464 - Disable kqueue on OS X 10.3 and earlier, to fix bug 371.
33467 Changes in version 0.1.2.12-rc - 2007-03-16
33469 - Fix an infinite loop introduced in 0.1.2.7-alpha when we serve
33470 directory information requested inside Tor connections (i.e. via
33471 begin_dir cells). It only triggered when the same connection was
33472 serving other data at the same time. Reported by seeess.
33475 - When creating a circuit via the controller, send a 'launched'
33476 event when we're done, so we follow the spec better.
33479 Changes in version 0.1.2.11-rc - 2007-03-15
33480 o Minor bugfixes (controller), reported by daejees:
33481 - Correct the control spec to match how the code actually responds
33482 to 'getinfo addr-mappings/*'.
33483 - The control spec described a GUARDS event, but the code
33484 implemented a GUARD event. Standardize on GUARD, but let people
33485 ask for GUARDS too.
33488 Changes in version 0.1.2.10-rc - 2007-03-07
33489 o Major bugfixes (Windows):
33490 - Do not load the NT services library functions (which may not exist)
33491 just to detect if we're a service trying to shut down. Now we run
33492 on Win98 and friends again.
33494 o Minor bugfixes (other):
33495 - Clarify a couple of log messages.
33496 - Fix a misleading socks5 error number.
33499 Changes in version 0.1.2.9-rc - 2007-03-02
33500 o Major bugfixes (Windows):
33501 - On MinGW, use "%I64u" to printf/scanf 64-bit integers, instead
33502 of the usual GCC "%llu". This prevents a bug when saving 64-bit
33503 int configuration values: the high-order 32 bits would get
33504 truncated. In particular, we were being bitten by the default
33505 MaxAdvertisedBandwidth of 128 TB turning into 0. (Fixes bug 400
33506 and maybe also bug 397.)
33508 o Minor bugfixes (performance):
33509 - Use OpenSSL's AES implementation on platforms where it's faster.
33510 This could save us as much as 10% CPU usage.
33512 o Minor bugfixes (server):
33513 - Do not rotate onion key immediately after setting it for the first
33516 o Minor bugfixes (directory authorities):
33517 - Stop calling servers that have been hibernating for a long time
33518 "stable". Also, stop letting hibernating or obsolete servers affect
33519 uptime and bandwidth cutoffs.
33520 - Stop listing hibernating servers in the v1 directory.
33522 o Minor bugfixes (hidden services):
33523 - Upload hidden service descriptors slightly less often, to reduce
33524 load on authorities.
33526 o Minor bugfixes (other):
33527 - Fix an assert that could trigger if a controller quickly set then
33528 cleared EntryNodes. Bug found by Udo van den Heuvel.
33529 - On architectures where sizeof(int)>4, still clamp declarable bandwidth
33531 - Fix a potential race condition in the rpm installer. Found by
33533 - Try to fix eventdns warnings once and for all: do not treat a dns rcode
33534 of 2 as indicating that the server is completely bad; it sometimes
33535 means that the server is just bad for the request in question. (may fix
33536 the last of bug 326.)
33537 - Disable encrypted directory connections when we don't have a server
33538 descriptor for the destination. We'll get this working again in
33542 Changes in version 0.1.2.8-beta - 2007-02-26
33543 o Major bugfixes (crashes):
33544 - Stop crashing when the controller asks us to resetconf more than
33545 one config option at once. (Vidalia 0.0.11 does this.)
33546 - Fix a crash that happened on Win98 when we're given command-line
33547 arguments: don't try to load NT service functions from advapi32.dll
33548 except when we need them. (Bug introduced in 0.1.2.7-alpha;
33550 - Fix a longstanding obscure crash bug that could occur when
33551 we run out of DNS worker processes. (Resolves bug 390.)
33553 o Major bugfixes (hidden services):
33554 - Correctly detect whether hidden service descriptor downloads are
33555 in-progress. (Suggested by Karsten Loesing; fixes bug 399.)
33557 o Major bugfixes (accounting):
33558 - When we start during an accounting interval before it's time to wake
33559 up, remember to wake up at the correct time. (May fix bug 342.)
33561 o Minor bugfixes (controller):
33562 - Give the controller END_STREAM_REASON_DESTROY events _before_ we
33563 clear the corresponding on_circuit variable, and remember later
33564 that we don't need to send a redundant CLOSED event. Resolves part
33566 - Report events where a resolve succeeded or where we got a socks
33567 protocol error correctly, rather than calling both of them
33569 - Change reported stream target addresses to IP consistently when
33570 we finally get the IP from an exit node.
33571 - Send log messages to the controller even if they happen to be very
33574 o Minor bugfixes (other):
33575 - Display correct results when reporting which versions are
33576 recommended, and how recommended they are. (Resolves bug 383.)
33577 - Improve our estimates for directory bandwidth to be less random:
33578 guess that an unrecognized directory will have the average bandwidth
33579 from all known directories, not that it will have the average
33580 bandwidth from those directories earlier than it on the list.
33581 - If we start a server with ClientOnly 1, then set ClientOnly to 0
33582 and hup, stop triggering an assert based on an empty onion_key.
33583 - On platforms with no working mmap() equivalent, don't warn the
33584 user when cached-routers doesn't exist.
33585 - Warn the user when mmap() [or its equivalent] fails for some reason
33586 other than file-not-found.
33587 - Don't warn the user when cached-routers.new doesn't exist: that's
33588 perfectly fine when starting up for the first time.
33589 - When EntryNodes are configured, rebuild the guard list to contain,
33590 in order: the EntryNodes that were guards before; the rest of the
33591 EntryNodes; the nodes that were guards before.
33592 - Mask out all signals in sub-threads; only the libevent signal
33593 handler should be processing them. This should prevent some crashes
33594 on some machines using pthreads. (Patch from coderman.)
33595 - Fix switched arguments on memset in the implementation of
33596 tor_munmap() for systems with no mmap() call.
33597 - When Tor receives a router descriptor that it asked for, but
33598 no longer wants (because it has received fresh networkstatuses
33599 in the meantime), do not warn the user. Cache the descriptor if
33600 we're a cache; drop it if we aren't.
33601 - Make earlier entry guards _really_ get retried when the network
33603 - On a malformed DNS reply, always give an error to the corresponding
33605 - Build with recent libevents on platforms that do not define the
33606 nonstandard types "u_int8_t" and friends.
33608 o Minor features (controller):
33609 - Warn the user when an application uses the obsolete binary v0
33610 control protocol. We're planning to remove support for it during
33611 the next development series, so it's good to give people some
33613 - Add STREAM_BW events to report per-entry-stream bandwidth
33614 use. (Patch from Robert Hogan.)
33615 - Rate-limit SIGNEWNYM signals in response to controllers that
33616 impolitely generate them for every single stream. (Patch from
33617 mwenge; closes bug 394.)
33618 - Make REMAP stream events have a SOURCE (cache or exit), and
33619 make them generated in every case where we get a successful
33620 connected or resolved cell.
33622 o Minor bugfixes (performance):
33623 - Call router_have_min_dir_info half as often. (This is showing up in
33624 some profiles, but not others.)
33625 - When using GCC, make log_debug never get called at all, and its
33626 arguments never get evaluated, when no debug logs are configured.
33627 (This is showing up in some profiles, but not others.)
33630 - Remove some never-implemented options. Mark PathlenCoinWeight as
33632 - Implement proposal 106: Stop requiring clients to have well-formed
33633 certificates; stop checking nicknames in certificates. (Clients
33634 have certificates so that they can look like Tor servers, but in
33635 the future we might want to allow them to look like regular TLS
33636 clients instead. Nicknames in certificates serve no purpose other
33637 than making our protocol easier to recognize on the wire.)
33638 - Revise messages on handshake failure again to be even more clear about
33639 which are incoming connections and which are outgoing.
33640 - Discard any v1 directory info that's over 1 month old (for
33641 directories) or over 1 week old (for running-routers lists).
33642 - Do not warn when individual nodes in the configuration's EntryNodes,
33643 ExitNodes, etc are down: warn only when all possible nodes
33644 are down. (Fixes bug 348.)
33645 - Always remove expired routers and networkstatus docs before checking
33646 whether we have enough information to build circuits. (Fixes
33648 - Put a lower-bound on MaxAdvertisedBandwidth.
33651 Changes in version 0.1.2.7-alpha - 2007-02-06
33652 o Major bugfixes (rate limiting):
33653 - Servers decline directory requests much more aggressively when
33654 they're low on bandwidth. Otherwise they end up queueing more and
33655 more directory responses, which can't be good for latency.
33656 - But never refuse directory requests from local addresses.
33657 - Fix a memory leak when sending a 503 response for a networkstatus
33659 - Be willing to read or write on local connections (e.g. controller
33660 connections) even when the global rate limiting buckets are empty.
33661 - If our system clock jumps back in time, don't publish a negative
33662 uptime in the descriptor. Also, don't let the global rate limiting
33663 buckets go absurdly negative.
33664 - Flush local controller connection buffers periodically as we're
33665 writing to them, so we avoid queueing 4+ megabytes of data before
33668 o Major bugfixes (NT services):
33669 - Install as NT_AUTHORITY\LocalService rather than as SYSTEM; add a
33670 command-line flag so that admins can override the default by saying
33671 "tor --service install --user "SomeUser"". This will not affect
33672 existing installed services. Also, warn the user that the service
33673 will look for its configuration file in the service user's
33674 %appdata% directory. (We can't do the 'hardwire the user's appdata
33675 directory' trick any more, since we may not have read access to that
33678 o Major bugfixes (other):
33679 - Previously, we would cache up to 16 old networkstatus documents
33680 indefinitely, if they came from nontrusted authorities. Now we
33681 discard them if they are more than 10 days old.
33682 - Fix a crash bug in the presence of DNS hijacking (reported by Andrew
33684 - Detect and reject malformed DNS responses containing circular
33686 - If exits are rare enough that we're not marking exits as guards,
33687 ignore exit bandwidth when we're deciding the required bandwidth
33689 - When we're handling a directory connection tunneled over Tor,
33690 don't fill up internal memory buffers with all the data we want
33691 to tunnel; instead, only add it if the OR connection that will
33692 eventually receive it has some room for it. (This can lead to
33693 slowdowns in tunneled dir connections; a better solution will have
33694 to wait for 0.2.0.)
33696 o Minor bugfixes (dns):
33697 - Add some defensive programming to eventdns.c in an attempt to catch
33698 possible memory-stomping bugs.
33699 - Detect and reject DNS replies containing IPv4 or IPv6 records with
33700 an incorrect number of bytes. (Previously, we would ignore the
33702 - Fix as-yet-unused reverse IPv6 lookup code so it sends nybbles
33703 in the correct order, and doesn't crash.
33704 - Free memory held in recently-completed DNS lookup attempts on exit.
33705 This was not a memory leak, but may have been hiding memory leaks.
33706 - Handle TTL values correctly on reverse DNS lookups.
33707 - Treat failure to parse resolv.conf as an error.
33709 o Minor bugfixes (other):
33710 - Fix crash with "tor --list-fingerprint" (reported by seeess).
33711 - When computing clock skew from directory HTTP headers, consider what
33712 time it was when we finished asking for the directory, not what
33714 - Expire socks connections if they spend too long waiting for the
33715 handshake to finish. Previously we would let them sit around for
33716 days, if the connecting application didn't close them either.
33717 - And if the socks handshake hasn't started, don't send a
33718 "DNS resolve socks failed" handshake reply; just close it.
33719 - Stop using C functions that OpenBSD's linker doesn't like.
33720 - Don't launch requests for descriptors unless we have networkstatuses
33721 from at least half of the authorities. This delays the first
33722 download slightly under pathological circumstances, but can prevent
33723 us from downloading a bunch of descriptors we don't need.
33724 - Do not log IPs with TLS failures for incoming TLS
33725 connections. (Fixes bug 382.)
33726 - If the user asks to use invalid exit nodes, be willing to use
33728 - Stop using the reserved ac_cv namespace in our configure script.
33729 - Call stat() slightly less often; use fstat() when possible.
33730 - Refactor the way we handle pending circuits when an OR connection
33731 completes or fails, in an attempt to fix a rare crash bug.
33732 - Only rewrite a conn's address based on X-Forwarded-For: headers
33733 if it's a parseable public IP address; and stop adding extra quotes
33734 to the resulting address.
33737 - Weight directory requests by advertised bandwidth. Now we can
33738 let servers enable write limiting but still allow most clients to
33739 succeed at their directory requests. (We still ignore weights when
33740 choosing a directory authority; I hope this is a feature.)
33743 - Create a new file ReleaseNotes which was the old ChangeLog. The
33744 new ChangeLog file now includes the summaries for all development
33746 - Check for addresses with invalid characters at the exit as well
33747 as at the client, and warn less verbosely when they fail. You can
33748 override this by setting ServerDNSAllowNonRFC953Addresses to 1.
33749 - Adapt a patch from goodell to let the contrib/exitlist script
33750 take arguments rather than require direct editing.
33751 - Inform the server operator when we decide not to advertise a
33752 DirPort due to AccountingMax enabled or a low BandwidthRate. It
33753 was confusing Zax, so now we're hopefully more helpful.
33754 - Bring us one step closer to being able to establish an encrypted
33755 directory tunnel without knowing a descriptor first. Still not
33756 ready yet. As part of the change, now assume we can use a
33757 create_fast cell if we don't know anything about a router.
33758 - Allow exit nodes to use nameservers running on ports other than 53.
33759 - Servers now cache reverse DNS replies.
33760 - Add an --ignore-missing-torrc command-line option so that we can
33761 get the "use sensible defaults if the configuration file doesn't
33762 exist" behavior even when specifying a torrc location on the command
33765 o Minor features (controller):
33766 - Track reasons for OR connection failure; make these reasons
33767 available via the controller interface. (Patch from Mike Perry.)
33768 - Add a SOCKS_BAD_HOSTNAME client status event so controllers
33769 can learn when clients are sending malformed hostnames to Tor.
33770 - Clean up documentation for controller status events.
33771 - Add a REMAP status to stream events to note that a stream's
33772 address has changed because of a cached address or a MapAddress
33776 Changes in version 0.1.2.6-alpha - 2007-01-09
33778 - Fix an assert error introduced in 0.1.2.5-alpha: if a single TLS
33779 connection handles more than 4 gigs in either direction, we crash.
33780 - Fix an assert error introduced in 0.1.2.5-alpha: if we're an
33781 advertised exit node, somebody might try to exit from us when
33782 we're bootstrapping and before we've built our descriptor yet.
33783 Refuse the connection rather than crashing.
33786 - Warn if we (as a server) find that we've resolved an address that we
33787 weren't planning to resolve.
33788 - Warn that using select() on any libevent version before 1.1 will be
33789 unnecessarily slow (even for select()).
33790 - Flush ERR-level controller status events just like we currently
33791 flush ERR-level log events, so that a Tor shutdown doesn't prevent
33792 the controller from learning about current events.
33794 o Minor features (more controller status events):
33795 - Implement EXTERNAL_ADDRESS server status event so controllers can
33796 learn when our address changes.
33797 - Implement BAD_SERVER_DESCRIPTOR server status event so controllers
33798 can learn when directories reject our descriptor.
33799 - Implement SOCKS_UNKNOWN_PROTOCOL client status event so controllers
33800 can learn when a client application is speaking a non-socks protocol
33802 - Implement DANGEROUS_SOCKS client status event so controllers
33803 can learn when a client application is leaking DNS addresses.
33804 - Implement BUG general status event so controllers can learn when
33805 Tor is unhappy about its internal invariants.
33806 - Implement CLOCK_SKEW general status event so controllers can learn
33807 when Tor thinks the system clock is set incorrectly.
33808 - Implement GOOD_SERVER_DESCRIPTOR and ACCEPTED_SERVER_DESCRIPTOR
33809 server status events so controllers can learn when their descriptors
33810 are accepted by a directory.
33811 - Implement CHECKING_REACHABILITY and REACHABILITY_{SUCCEEDED|FAILED}
33812 server status events so controllers can learn about Tor's progress in
33813 deciding whether it's reachable from the outside.
33814 - Implement BAD_LIBEVENT general status event so controllers can learn
33815 when we have a version/method combination in libevent that needs to
33817 - Implement NAMESERVER_STATUS, NAMESERVER_ALL_DOWN, DNS_HIJACKED,
33818 and DNS_USELESS server status events so controllers can learn
33819 about changes to DNS server status.
33821 o Minor features (directory):
33822 - Authorities no longer recommend exits as guards if this would shift
33823 too much load to the exit nodes.
33826 Changes in version 0.1.2.5-alpha - 2007-01-06
33828 - Enable write limiting as well as read limiting. Now we sacrifice
33829 capacity if we're pushing out lots of directory traffic, rather
33830 than overrunning the user's intended bandwidth limits.
33831 - Include TLS overhead when counting bandwidth usage; previously, we
33832 would count only the bytes sent over TLS, but not the bytes used
33834 - Support running the Tor service with a torrc not in the same
33835 directory as tor.exe and default to using the torrc located in
33836 the %appdata%\Tor\ of the user who installed the service. Patch
33838 - Servers now check for the case when common DNS requests are going to
33839 wildcarded addresses (i.e. all getting the same answer), and change
33840 their exit policy to reject *:* if it's happening.
33841 - Implement BEGIN_DIR cells, so we can connect to the directory
33842 server via TLS to do encrypted directory requests rather than
33843 plaintext. Enable via the TunnelDirConns and PreferTunneledDirConns
33844 config options if you like.
33846 o Minor features (config and docs):
33847 - Start using the state file to store bandwidth accounting data:
33848 the bw_accounting file is now obsolete. We'll keep generating it
33849 for a while for people who are still using 0.1.2.4-alpha.
33850 - Try to batch changes to the state file so that we do as few
33851 disk writes as possible while still storing important things in
33853 - The state file and the bw_accounting file get saved less often when
33854 the AvoidDiskWrites config option is set.
33855 - Make PIDFile work on Windows (untested).
33856 - Add internal descriptions for a bunch of configuration options:
33857 accessible via controller interface and in comments in saved
33859 - Reject *:563 (NNTPS) in the default exit policy. We already reject
33860 NNTP by default, so this seems like a sensible addition.
33861 - Clients now reject hostnames with invalid characters. This should
33862 avoid some inadvertent info leaks. Add an option
33863 AllowNonRFC953Hostnames to disable this behavior, in case somebody
33864 is running a private network with hosts called @, !, and #.
33865 - Add a maintainer script to tell us which options are missing
33866 documentation: "make check-docs".
33867 - Add a new address-spec.txt document to describe our special-case
33868 addresses: .exit, .onion, and .noconnnect.
33870 o Minor features (DNS):
33871 - Ongoing work on eventdns infrastructure: now it has dns server
33872 and ipv6 support. One day Tor will make use of it.
33873 - Add client-side caching for reverse DNS lookups.
33874 - Add support to tor-resolve tool for reverse lookups and SOCKS5.
33875 - When we change nameservers or IP addresses, reset and re-launch
33876 our tests for DNS hijacking.
33878 o Minor features (directory):
33879 - Authorities now specify server versions in networkstatus. This adds
33880 about 2% to the size of compressed networkstatus docs, and allows
33881 clients to tell which servers support BEGIN_DIR and which don't.
33882 The implementation is forward-compatible with a proposed future
33883 protocol version scheme not tied to Tor versions.
33884 - DirServer configuration lines now have an orport= option so
33885 clients can open encrypted tunnels to the authorities without
33886 having downloaded their descriptors yet. Enabled for moria1,
33887 moria2, tor26, and lefkada now in the default configuration.
33888 - Directory servers are more willing to send a 503 "busy" if they
33889 are near their write limit, especially for v1 directory requests.
33890 Now they can use their limited bandwidth for actual Tor traffic.
33891 - Clients track responses with status 503 from dirservers. After a
33892 dirserver has given us a 503, we try not to use it until an hour has
33893 gone by, or until we have no dirservers that haven't given us a 503.
33894 - When we get a 503 from a directory, and we're not a server, we don't
33895 count the failure against the total number of failures allowed
33896 for the thing we're trying to download.
33897 - Report X-Your-Address-Is correctly from tunneled directory
33898 connections; don't report X-Your-Address-Is when it's an internal
33899 address; and never believe reported remote addresses when they're
33901 - Protect against an unlikely DoS attack on directory servers.
33902 - Add a BadDirectory flag to network status docs so that authorities
33903 can (eventually) tell clients about caches they believe to be
33906 o Minor features (controller):
33907 - Have GETINFO dir/status/* work on hosts with DirPort disabled.
33908 - Reimplement GETINFO so that info/names stays in sync with the
33910 - Implement "GETINFO fingerprint".
33911 - Implement "SETEVENTS GUARD" so controllers can get updates on
33912 entry guard status as it changes.
33914 o Minor features (clean up obsolete pieces):
33915 - Remove some options that have been deprecated since at least
33916 0.1.0.x: AccountingMaxKB, LogFile, DebugLogFile, LogLevel, and
33917 SysLog. Use AccountingMax instead of AccountingMaxKB, and use Log
33918 to set log options.
33919 - We no longer look for identity and onion keys in "identity.key" and
33920 "onion.key" -- these were replaced by secret_id_key and
33921 secret_onion_key in 0.0.8pre1.
33922 - We no longer require unrecognized directory entries to be
33925 o Major bugfixes (security):
33926 - Stop sending the HttpProxyAuthenticator string to directory
33927 servers when directory connections are tunnelled through Tor.
33928 - Clients no longer store bandwidth history in the state file.
33929 - Do not log introduction points for hidden services if SafeLogging
33931 - When generating bandwidth history, round down to the nearest
33932 1k. When storing accounting data, round up to the nearest 1k.
33933 - When we're running as a server, remember when we last rotated onion
33934 keys, so that we will rotate keys once they're a week old even if
33935 we never stay up for a week ourselves.
33937 o Major bugfixes (other):
33938 - Fix a longstanding bug in eventdns that prevented the count of
33939 timed-out resolves from ever being reset. This bug caused us to
33940 give up on a nameserver the third time it timed out, and try it
33941 10 seconds later... and to give up on it every time it timed out
33943 - Take out the '5 second' timeout from the connection retry
33944 schedule. Now the first connect attempt will wait a full 10
33945 seconds before switching to a new circuit. Perhaps this will help
33946 a lot. Based on observations from Mike Perry.
33947 - Fix a bug on the Windows implementation of tor_mmap_file() that
33948 would prevent the cached-routers file from ever loading. Reported
33952 - Fix an assert failure when a directory authority sets
33953 AuthDirRejectUnlisted and then receives a descriptor from an
33954 unlisted router. Reported by seeess.
33955 - Avoid a double-free when parsing malformed DirServer lines.
33956 - Fix a bug when a BSD-style PF socket is first used. Patch from
33958 - Fix a bug in 0.1.2.2-alpha that prevented clients from asking
33959 to resolve an address at a given exit node even when they ask for
33961 - Servers no longer ever list themselves in their "family" line,
33962 even if configured to do so. This makes it easier to configure
33963 family lists conveniently.
33964 - When running as a server, don't fall back to 127.0.0.1 when no
33965 nameservers are configured in /etc/resolv.conf; instead, make the
33966 user fix resolv.conf or specify nameservers explicitly. (Resolves
33968 - Stop accepting certain malformed ports in configured exit policies.
33969 - Don't re-write the fingerprint file every restart, unless it has
33971 - Stop warning when a single nameserver fails: only warn when _all_ of
33972 our nameservers have failed. Also, when we only have one nameserver,
33973 raise the threshold for deciding that the nameserver is dead.
33974 - Directory authorities now only decide that routers are reachable
33975 if their identity keys are as expected.
33976 - When the user uses bad syntax in the Log config line, stop
33977 suggesting other bad syntax as a replacement.
33978 - Correctly detect ipv6 DNS capability on OpenBSD.
33980 o Minor bugfixes (controller):
33981 - Report the circuit number correctly in STREAM CLOSED events. Bug
33982 reported by Mike Perry.
33983 - Do not report bizarre values for results of accounting GETINFOs
33984 when the last second's write or read exceeds the allotted bandwidth.
33985 - Report "unrecognized key" rather than an empty string when the
33986 controller tries to fetch a networkstatus that doesn't exist.
33989 Changes in version 0.1.1.26 - 2006-12-14
33990 o Security bugfixes:
33991 - Stop sending the HttpProxyAuthenticator string to directory
33992 servers when directory connections are tunnelled through Tor.
33993 - Clients no longer store bandwidth history in the state file.
33994 - Do not log introduction points for hidden services if SafeLogging
33998 - Fix an assert failure when a directory authority sets
33999 AuthDirRejectUnlisted and then receives a descriptor from an
34000 unlisted router (reported by seeess).
34003 Changes in version 0.1.2.4-alpha - 2006-12-03
34005 - Add support for using natd; this allows FreeBSDs earlier than
34006 5.1.2 to have ipfw send connections through Tor without using
34007 SOCKS. (Patch from Zajcev Evgeny with tweaks from tup.)
34010 - Make all connections to addresses of the form ".noconnect"
34011 immediately get closed. This lets application/controller combos
34012 successfully test whether they're talking to the same Tor by
34013 watching for STREAM events.
34014 - Make cross.sh cross-compilation script work even when autogen.sh
34015 hasn't been run. (Patch from Michael Mohr.)
34016 - Statistics dumped by -USR2 now include a breakdown of public key
34017 operations, for profiling.
34020 - Fix a major leak when directory authorities parse their
34021 approved-routers list, a minor memory leak when we fail to pick
34022 an exit node, and a few rare leaks on errors.
34023 - Handle TransPort connections even when the server sends data before
34024 the client sends data. Previously, the connection would just hang
34025 until the client sent data. (Patch from tup based on patch from
34027 - Avoid assert failure when our cached-routers file is empty on
34031 - Don't log spurious warnings when we see a circuit close reason we
34032 don't recognize; it's probably just from a newer version of Tor.
34033 - Have directory authorities allow larger amounts of drift in uptime
34034 without replacing the server descriptor: previously, a server that
34035 restarted every 30 minutes could have 48 "interesting" descriptors
34037 - Start linking to the Tor specification and Tor reference manual
34038 correctly in the Windows installer.
34039 - Add Vidalia to the OS X uninstaller script, so when we uninstall
34040 Tor/Privoxy we also uninstall Vidalia.
34041 - Resume building on Irix64, and fix a lot of warnings from its
34042 MIPSpro C compiler.
34043 - Don't corrupt last_guessed_ip in router_new_address_suggestion()
34044 when we're running as a client.
34047 Changes in version 0.1.1.25 - 2006-11-04
34049 - When a client asks us to resolve (rather than connect to)
34050 an address, and we have a cached answer, give them the cached
34051 answer. Previously, we would give them no answer at all.
34052 - We were building exactly the wrong circuits when we predict
34053 hidden service requirements, meaning Tor would have to build all
34054 its circuits on demand.
34055 - If none of our live entry guards have a high uptime, but we
34056 require a guard with a high uptime, try adding a new guard before
34057 we give up on the requirement. This patch should make long-lived
34058 connections more stable on average.
34059 - When testing reachability of our DirPort, don't launch new
34060 tests when there's already one in progress -- unreachable
34061 servers were stacking up dozens of testing streams.
34063 o Security bugfixes:
34064 - When the user sends a NEWNYM signal, clear the client-side DNS
34065 cache too. Otherwise we continue to act on previous information.
34068 - Avoid a memory corruption bug when creating a hash table for
34070 - Avoid possibility of controller-triggered crash when misusing
34071 certain commands from a v0 controller on platforms that do not
34072 handle printf("%s",NULL) gracefully.
34073 - Avoid infinite loop on unexpected controller input.
34074 - Don't log spurious warnings when we see a circuit close reason we
34075 don't recognize; it's probably just from a newer version of Tor.
34076 - Add Vidalia to the OS X uninstaller script, so when we uninstall
34077 Tor/Privoxy we also uninstall Vidalia.
34080 Changes in version 0.1.2.3-alpha - 2006-10-29
34082 - Prepare for servers to publish descriptors less often: never
34083 discard a descriptor simply for being too old until either it is
34084 recommended by no authorities, or until we get a better one for
34085 the same router. Make caches consider retaining old recommended
34086 routers for even longer.
34087 - If most authorities set a BadExit flag for a server, clients
34088 don't think of it as a general-purpose exit. Clients only consider
34089 authorities that advertise themselves as listing bad exits.
34090 - Directory servers now provide 'Pragma: no-cache' and 'Expires'
34091 headers for content, so that we can work better in the presence of
34092 caching HTTP proxies.
34093 - Allow authorities to list nodes as bad exits by fingerprint or by
34096 o Minor features, controller:
34097 - Add a REASON field to CIRC events; for backward compatibility, this
34098 field is sent only to controllers that have enabled the extended
34099 event format. Also, add additional reason codes to explain why
34100 a given circuit has been destroyed or truncated. (Patches from
34102 - Add a REMOTE_REASON field to extended CIRC events to tell the
34103 controller about why a remote OR told us to close a circuit.
34104 - Stream events also now have REASON and REMOTE_REASON fields,
34105 working much like those for circuit events.
34106 - There's now a GETINFO ns/... field so that controllers can ask Tor
34107 about the current status of a router.
34108 - A new event type "NS" to inform a controller when our opinion of
34109 a router's status has changed.
34110 - Add a GETINFO events/names and GETINFO features/names so controllers
34111 can tell which events and features are supported.
34112 - A new CLEARDNSCACHE signal to allow controllers to clear the
34113 client-side DNS cache without expiring circuits.
34115 o Security bugfixes:
34116 - When the user sends a NEWNYM signal, clear the client-side DNS
34117 cache too. Otherwise we continue to act on previous information.
34120 - Avoid sending junk to controllers or segfaulting when a controller
34121 uses EVENT_NEW_DESC with verbose nicknames.
34122 - Stop triggering asserts if the controller tries to extend hidden
34123 service circuits (reported by mwenge).
34124 - Avoid infinite loop on unexpected controller input.
34125 - When the controller does a "GETINFO network-status", tell it
34126 about even those routers whose descriptors are very old, and use
34127 long nicknames where appropriate.
34128 - Change NT service functions to be loaded on demand. This lets us
34129 build with MinGW without breaking Tor for Windows 98 users.
34130 - Do DirPort reachability tests less often, since a single test
34131 chews through many circuits before giving up.
34132 - In the hidden service example in torrc.sample, stop recommending
34133 esoteric and discouraged hidden service options.
34134 - When stopping an NT service, wait up to 10 sec for it to actually
34135 stop. Patch from Matt Edman; resolves bug 295.
34136 - Fix handling of verbose nicknames with ORCONN controller events:
34137 make them show up exactly when requested, rather than exactly when
34139 - When reporting verbose nicknames in entry_guards_getinfo(), avoid
34140 printing a duplicate "$" in the keys we send (reported by mwenge).
34141 - Correctly set maximum connection limit on Cygwin. (This time
34143 - Try to detect Windows correctly when cross-compiling.
34144 - Detect the size of the routers file correctly even if it is
34145 corrupted (on systems without mmap) or not page-aligned (on systems
34146 with mmap). This bug was harmless.
34147 - Sometimes we didn't bother sending a RELAY_END cell when an attempt
34148 to open a stream fails; now we do in more cases. This should
34149 make clients able to find a good exit faster in some cases, since
34150 unhandleable requests will now get an error rather than timing out.
34151 - Resolve two memory leaks when rebuilding the on-disk router cache
34152 (reported by fookoowa).
34153 - Clean up minor code warnings suggested by the MIPSpro C compiler,
34154 and reported by some Centos users.
34155 - Controller signals now work on non-Unix platforms that don't define
34156 SIGUSR1 and SIGUSR2 the way we expect.
34157 - Patch from Michael Mohr to contrib/cross.sh, so it checks more
34158 values before failing, and always enables eventdns.
34159 - Libevent-1.2 exports, but does not define in its headers, strlcpy.
34160 Try to fix this in configure.in by checking for most functions
34161 before we check for libevent.
34164 Changes in version 0.1.2.2-alpha - 2006-10-07
34166 - Make our async eventdns library on-by-default for Tor servers,
34167 and plan to deprecate the separate dnsworker threads.
34168 - Add server-side support for "reverse" DNS lookups (using PTR
34169 records so clients can determine the canonical hostname for a given
34170 IPv4 address). Only supported by servers using eventdns; servers
34171 now announce in their descriptors whether they support eventdns.
34172 - Specify and implement client-side SOCKS5 interface for reverse DNS
34173 lookups (see doc/socks-extensions.txt).
34174 - Add a BEGIN_DIR relay cell type for an easier in-protocol way to
34175 connect to directory servers through Tor. Previously, clients needed
34176 to find Tor exits to make private connections to directory servers.
34177 - Avoid choosing Exit nodes for entry or middle hops when the
34178 total bandwidth available from non-Exit nodes is much higher than
34179 the total bandwidth available from Exit nodes.
34180 - Workaround for name servers (like Earthlink's) that hijack failing
34181 DNS requests and replace the no-such-server answer with a "helpful"
34182 redirect to an advertising-driven search portal. Also work around
34183 DNS hijackers who "helpfully" decline to hijack known-invalid
34184 RFC2606 addresses. Config option "ServerDNSDetectHijacking 0"
34185 lets you turn it off.
34186 - Send out a burst of long-range padding cells once we've established
34187 that we're reachable. Spread them over 4 circuits, so hopefully
34188 a few will be fast. This exercises our bandwidth and bootstraps
34189 us into the directory more quickly.
34191 o New/improved config options:
34192 - Add new config option "ResolvConf" to let the server operator
34193 choose an alternate resolve.conf file when using eventdns.
34194 - Add an "EnforceDistinctSubnets" option to control our "exclude
34195 servers on the same /16" behavior. It's still on by default; this
34196 is mostly for people who want to operate private test networks with
34197 all the machines on the same subnet.
34198 - If one of our entry guards is on the ExcludeNodes list, or the
34199 directory authorities don't think it's a good guard, treat it as
34200 if it were unlisted: stop using it as a guard, and throw it off
34201 the guards list if it stays that way for a long time.
34202 - Allow directory authorities to be marked separately as authorities
34203 for the v1 directory protocol, the v2 directory protocol, and
34204 as hidden service directories, to make it easier to retire old
34205 authorities. V1 authorities should set "HSAuthoritativeDir 1"
34206 to continue being hidden service authorities too.
34207 - Remove 8888 as a LongLivedPort, and add 6697 (IRCS).
34209 o Minor features, controller:
34210 - Fix CIRC controller events so that controllers can learn the
34211 identity digests of non-Named servers used in circuit paths.
34212 - Let controllers ask for more useful identifiers for servers. Instead
34213 of learning identity digests for un-Named servers and nicknames
34214 for Named servers, the new identifiers include digest, nickname,
34215 and indication of Named status. Off by default; see control-spec.txt
34216 for more information.
34217 - Add a "getinfo address" controller command so it can display Tor's
34218 best guess to the user.
34219 - New controller event to alert the controller when our server
34220 descriptor has changed.
34221 - Give more meaningful errors on controller authentication failure.
34223 o Minor features, other:
34224 - When asked to resolve a hostname, don't use non-exit servers unless
34225 requested to do so. This allows servers with broken DNS to be
34226 useful to the network.
34227 - Divide eventdns log messages into warn and info messages.
34228 - Reserve the nickname "Unnamed" for routers that can't pick
34229 a hostname: any router can call itself Unnamed; directory
34230 authorities will never allocate Unnamed to any particular router;
34231 clients won't believe that any router is the canonical Unnamed.
34232 - Only include function names in log messages for info/debug messages.
34233 For notice/warn/err, the content of the message should be clear on
34234 its own, and printing the function name only confuses users.
34235 - Avoid some false positives during reachability testing: don't try
34236 to test via a server that's on the same /24 as us.
34237 - If we fail to build a circuit to an intended enclave, and it's
34238 not mandatory that we use that enclave, stop wanting it.
34239 - When eventdns is enabled, allow multithreaded builds on NetBSD and
34240 OpenBSD. (We had previously disabled threads on these platforms
34241 because they didn't have working thread-safe resolver functions.)
34243 o Major bugfixes, anonymity/security:
34244 - If a client asked for a server by name, and there's a named server
34245 in our network-status but we don't have its descriptor yet, we
34246 could return an unnamed server instead.
34247 - Fix NetBSD bug that could allow someone to force uninitialized RAM
34248 to be sent to a server's DNS resolver. This only affects NetBSD
34249 and other platforms that do not bounds-check tolower().
34250 - Reject (most) attempts to use Tor circuits with length one. (If
34251 many people start using Tor as a one-hop proxy, exit nodes become
34252 a more attractive target for compromise.)
34253 - Just because your DirPort is open doesn't mean people should be
34254 able to remotely teach you about hidden service descriptors. Now
34255 only accept rendezvous posts if you've got HSAuthoritativeDir set.
34257 o Major bugfixes, other:
34258 - Don't crash on race condition in dns.c: tor_assert(!resolve->expire)
34259 - When a client asks the server to resolve (not connect to)
34260 an address, and it has a cached answer, give them the cached answer.
34261 Previously, the server would give them no answer at all.
34262 - Allow really slow clients to not hang up five minutes into their
34263 directory downloads (suggested by Adam J. Richter).
34264 - We were building exactly the wrong circuits when we anticipated
34265 hidden service requirements, meaning Tor would have to build all
34266 its circuits on demand.
34267 - Avoid crashing when we mmap a router cache file of size 0.
34268 - When testing reachability of our DirPort, don't launch new
34269 tests when there's already one in progress -- unreachable
34270 servers were stacking up dozens of testing streams.
34272 o Minor bugfixes, correctness:
34273 - If we're a directory mirror and we ask for "all" network status
34274 documents, we would discard status documents from authorities
34275 we don't recognize.
34276 - Avoid a memory corruption bug when creating a hash table for
34278 - Avoid controller-triggered crash when misusing certain commands
34279 from a v0 controller on platforms that do not handle
34280 printf("%s",NULL) gracefully.
34281 - Don't crash when a controller sends a third argument to an
34282 "extendcircuit" request.
34283 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
34284 response; fix error code when "getinfo dir/status/" fails.
34285 - Avoid crash when telling controller stream-status and a stream
34287 - Patch from Adam Langley to fix assert() in eventdns.c.
34288 - Fix a debug log message in eventdns to say "X resolved to Y"
34289 instead of "X resolved to X".
34290 - Make eventdns give strings for DNS errors, not just error numbers.
34291 - Track unreachable entry guards correctly: don't conflate
34292 'unreachable by us right now' with 'listed as down by the directory
34293 authorities'. With the old code, if a guard was unreachable by
34294 us but listed as running, it would clog our guard list forever.
34295 - Behave correctly in case we ever have a network with more than
34296 2GB/s total advertised capacity.
34297 - Make TrackExitHosts case-insensitive, and fix the behavior of
34298 ".suffix" TrackExitHosts items to avoid matching in the middle of
34300 - Finally fix the openssl warnings from newer gccs that believe that
34301 ignoring a return value is okay, but casting a return value and
34302 then ignoring it is a sign of madness.
34303 - Prevent the contrib/exitlist script from printing the same
34304 result more than once.
34305 - Patch from Steve Hildrey: Generate network status correctly on
34306 non-versioning dirservers.
34307 - Don't listen to the X-Your-Address-Is hint if you did the lookup
34308 via Tor; otherwise you'll think you're the exit node's IP address.
34310 o Minor bugfixes, performance:
34311 - Two small performance improvements on parsing descriptors.
34312 - Major performance improvement on inserting descriptors: change
34313 algorithm from O(n^2) to O(n).
34314 - Make the common memory allocation path faster on machines where
34315 malloc(0) returns a pointer.
34316 - Start remembering X-Your-Address-Is directory hints even if you're
34317 a client, so you can become a server more smoothly.
34318 - Avoid duplicate entries on MyFamily line in server descriptor.
34320 o Packaging, features:
34321 - Remove architecture from OS X builds. The official builds are
34322 now universal binaries.
34323 - The Debian package now uses --verify-config when (re)starting,
34324 to distinguish configuration errors from other errors.
34325 - Update RPMs to require libevent 1.1b.
34327 o Packaging, bugfixes:
34328 - Patches so Tor builds with MinGW on Windows.
34329 - Patches so Tor might run on Cygwin again.
34330 - Resume building on non-gcc compilers and ancient gcc. Resume
34331 building with the -O0 compile flag. Resume building cleanly on
34333 - Run correctly on OS X platforms with case-sensitive filesystems.
34334 - Correct includes for net/if.h and net/pfvar.h on OpenBSD (from Tup).
34335 - Add autoconf checks so Tor can build on Solaris x86 again.
34338 - Documented (and renamed) ServerDNSSearchDomains and
34339 ServerDNSResolvConfFile options.
34340 - Be clearer that the *ListenAddress directives can be repeated
34344 Changes in version 0.1.1.24 - 2006-09-29
34346 - Allow really slow clients to not hang up five minutes into their
34347 directory downloads (suggested by Adam J. Richter).
34348 - Fix major performance regression from 0.1.0.x: instead of checking
34349 whether we have enough directory information every time we want to
34350 do something, only check when the directory information has changed.
34351 This should improve client CPU usage by 25-50%.
34352 - Don't crash if, after a server has been running for a while,
34353 it can't resolve its hostname.
34356 - Allow Tor to start when RunAsDaemon is set but no logs are set.
34357 - Don't crash when the controller receives a third argument to an
34358 "extendcircuit" request.
34359 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
34360 response; fix error code when "getinfo dir/status/" fails.
34361 - Fix configure.in to not produce broken configure files with
34362 more recent versions of autoconf. Thanks to Clint for his auto*
34364 - Fix security bug on NetBSD that could allow someone to force
34365 uninitialized RAM to be sent to a server's DNS resolver. This
34366 only affects NetBSD and other platforms that do not bounds-check
34368 - Warn user when using libevent 1.1a or earlier with win32 or kqueue
34369 methods: these are known to be buggy.
34370 - If we're a directory mirror and we ask for "all" network status
34371 documents, we would discard status documents from authorities
34372 we don't recognize.
34375 Changes in version 0.1.2.1-alpha - 2006-08-27
34377 - Add "eventdns" async dns library from Adam Langley, tweaked to
34378 build on OSX and Windows. Only enabled if you pass the
34379 --enable-eventdns argument to configure.
34380 - Allow servers with no hostname or IP address to learn their
34381 IP address by asking the directory authorities. This code only
34382 kicks in when you would normally have exited with a "no address"
34383 error. Nothing's authenticated, so use with care.
34384 - Rather than waiting a fixed amount of time between retrying
34385 application connections, we wait only 5 seconds for the first,
34386 10 seconds for the second, and 15 seconds for each retry after
34387 that. Hopefully this will improve the expected user experience.
34388 - Patch from Tup to add support for transparent AP connections:
34389 this basically bundles the functionality of trans-proxy-tor
34390 into the Tor mainline. Now hosts with compliant pf/netfilter
34391 implementations can redirect TCP connections straight to Tor
34392 without diverting through SOCKS. Needs docs.
34393 - Busy directory servers save lots of memory by spooling server
34394 descriptors, v1 directories, and v2 networkstatus docs to buffers
34395 as needed rather than en masse. Also mmap the cached-routers
34396 files, so we don't need to keep the whole thing in memory too.
34397 - Automatically avoid picking more than one node from the same
34398 /16 network when constructing a circuit.
34399 - Revise and clean up the torrc.sample that we ship with; add
34400 a section for BandwidthRate and BandwidthBurst.
34403 - Split circuit_t into origin_circuit_t and or_circuit_t, and
34404 split connection_t into edge, or, dir, control, and base structs.
34405 These will save quite a bit of memory on busy servers, and they'll
34406 also help us track down bugs in the code and bugs in the spec.
34407 - Experimentally re-enable kqueue on OSX when using libevent 1.1b
34408 or later. Log when we are doing this, so we can diagnose it when
34409 it fails. (Also, recommend libevent 1.1b for kqueue and
34410 win32 methods; deprecate libevent 1.0b harder; make libevent
34411 recommendation system saner.)
34412 - Start being able to build universal binaries on OS X (thanks
34414 - Export the default exit policy via the control port, so controllers
34415 don't need to guess what it is / will be later.
34416 - Add a man page entry for ProtocolWarnings.
34417 - Add TestVia config option to the man page.
34418 - Remove even more protocol-related warnings from Tor server logs,
34419 such as bad TLS handshakes and malformed begin cells.
34420 - Stop fetching descriptors if you're not a dir mirror and you
34421 haven't tried to establish any circuits lately. [This currently
34422 causes some dangerous behavior, because when you start up again
34423 you'll use your ancient server descriptors.]
34424 - New DirPort behavior: if you have your dirport set, you download
34425 descriptors aggressively like a directory mirror, whether or not
34426 your ORPort is set.
34427 - Get rid of the router_retry_connections notion. Now routers
34428 no longer try to rebuild long-term connections to directory
34429 authorities, and directory authorities no longer try to rebuild
34430 long-term connections to all servers. We still don't hang up
34431 connections in these two cases though -- we need to look at it
34432 more carefully to avoid flapping, and we likely need to wait til
34433 0.1.1.x is obsolete.
34434 - Drop compatibility with obsolete Tors that permit create cells
34435 to have the wrong circ_id_type.
34436 - Re-enable per-connection rate limiting. Get rid of the "OP
34437 bandwidth" concept. Lay groundwork for "bandwidth classes" --
34438 separate global buckets that apply depending on what sort of conn
34440 - Start publishing one minute or so after we find our ORPort
34441 to be reachable. This will help reduce the number of descriptors
34442 we have for ourselves floating around, since it's quite likely
34443 other things (e.g. DirPort) will change during that minute too.
34444 - Fork the v1 directory protocol into its own spec document,
34445 and mark dir-spec.txt as the currently correct (v2) spec.
34448 - When we find our DirPort to be reachable, publish a new descriptor
34449 so we'll tell the world (reported by pnx).
34450 - Publish a new descriptor after we hup/reload. This is important
34451 if our config has changed such that we'll want to start advertising
34452 our DirPort now, etc.
34453 - Allow Tor to start when RunAsDaemon is set but no logs are set.
34454 - When we have a state file we cannot parse, tell the user and
34455 move it aside. Now we avoid situations where the user starts
34456 Tor in 1904, Tor writes a state file with that timestamp in it,
34457 the user fixes her clock, and Tor refuses to start.
34458 - Fix configure.in to not produce broken configure files with
34459 more recent versions of autoconf. Thanks to Clint for his auto*
34461 - "tor --verify-config" now exits with -1(255) or 0 depending on
34462 whether the config options are bad or good.
34463 - Resolve bug 321 when using dnsworkers: append a period to every
34464 address we resolve at the exit node, so that we do not accidentally
34465 pick up local addresses, and so that failing searches are retried
34466 in the resolver search domains. (This is already solved for
34467 eventdns.) (This breaks Blossom servers for now.)
34468 - If we are using an exit enclave and we can't connect, e.g. because
34469 its webserver is misconfigured to not listen on localhost, then
34470 back off and try connecting from somewhere else before we fail.
34473 - Start compiling on MinGW on Windows (patches from Mike Chiussi).
34474 - Start compiling on MSVC6 on Windows (patches from Frediano Ziglio).
34475 - Fix bug 314: Tor clients issued "unsafe socks" warnings even
34476 when the IP address is mapped through MapAddress to a hostname.
34477 - Start passing "ipv4" hints to getaddrinfo(), so servers don't do
34478 useless IPv6 DNS resolves.
34479 - Patch suggested by Karsten Loesing: respond to SIGNAL command
34480 before we execute the signal, in case the signal shuts us down.
34481 - Clean up AllowInvalidNodes man page entry.
34482 - Claim a commonname of Tor, rather than TOR, in TLS handshakes.
34483 - Add more asserts to track down an assert error on a windows Tor
34484 server with connection_add being called with socket == -1.
34485 - Handle reporting OR_CONN_EVENT_NEW events to the controller.
34486 - Fix misleading log messages: an entry guard that is "unlisted",
34487 as well as not known to be "down" (because we've never heard
34488 of it), is not therefore "up".
34489 - Remove code to special-case "-cvs" ending, since it has not
34490 actually mattered since 0.0.9.
34491 - Make our socks5 handling more robust to broken socks clients:
34492 throw out everything waiting on the buffer in between socks
34493 handshake phases, since they can't possibly (so the theory
34494 goes) have predicted what we plan to respond to them.
34497 Changes in version 0.1.1.23 - 2006-07-30
34499 - Fast Tor servers, especially exit nodes, were triggering asserts
34500 due to a bug in handling the list of pending DNS resolves. Some
34501 bugs still remain here; we're hunting them.
34502 - Entry guards could crash clients by sending unexpected input.
34503 - More fixes on reachability testing: if you find yourself reachable,
34504 then don't ever make any client requests (so you stop predicting
34505 circuits), then hup or have your clock jump, then later your IP
34506 changes, you won't think circuits are working, so you won't try to
34507 test reachability, so you won't publish.
34510 - Avoid a crash if the controller does a resetconf firewallports
34511 and then a setconf fascistfirewall=1.
34512 - Avoid an integer underflow when the dir authority decides whether
34513 a router is stable: we might wrongly label it stable, and compute
34514 a slightly wrong median stability, when a descriptor is published
34516 - Fix a place where we might trigger an assert if we can't build our
34517 own server descriptor yet.
34520 Changes in version 0.1.1.22 - 2006-07-05
34522 - Fix a big bug that was causing servers to not find themselves
34523 reachable if they changed IP addresses. Since only 0.1.1.22+
34524 servers can do reachability testing correctly, now we automatically
34525 make sure to test via one of these.
34526 - Fix to allow clients and mirrors to learn directory info from
34527 descriptor downloads that get cut off partway through.
34528 - Directory authorities had a bug in deciding if a newly published
34529 descriptor was novel enough to make everybody want a copy -- a few
34530 servers seem to be publishing new descriptors many times a minute.
34532 - Fix a rare bug that was causing some servers to complain about
34533 "closing wedged cpuworkers" and skip some circuit create requests.
34534 - Make the Exit flag in directory status documents actually work.
34537 Changes in version 0.1.1.21 - 2006-06-10
34538 o Crash and assert fixes from 0.1.1.20:
34539 - Fix a rare crash on Tor servers that have enabled hibernation.
34540 - Fix a seg fault on startup for Tor networks that use only one
34541 directory authority.
34542 - Fix an assert from a race condition that occurs on Tor servers
34543 while exiting, where various threads are trying to log that they're
34544 exiting, and delete the logs, at the same time.
34545 - Make our unit tests pass again on certain obscure platforms.
34548 - Add support for building SUSE RPM packages.
34549 - Speed up initial bootstrapping for clients: if we are making our
34550 first ever connection to any entry guard, then don't mark it down
34552 - When only one Tor server in the network is labelled as a guard,
34553 and we've already picked him, we would cycle endlessly picking him
34554 again, being unhappy about it, etc. Now we specifically exclude
34555 current guards when picking a new guard.
34556 - Servers send create cells more reliably after the TLS connection
34557 is established: we were sometimes forgetting to send half of them
34558 when we had more than one pending.
34559 - If we get a create cell that asks us to extend somewhere, but the
34560 Tor server there doesn't match the expected digest, we now send
34561 a destroy cell back, rather than silently doing nothing.
34562 - Make options->RedirectExit work again.
34563 - Make cookie authentication for the controller work again.
34564 - Stop being picky about unusual characters in the arguments to
34565 mapaddress. It's none of our business.
34566 - Add a new config option "TestVia" that lets you specify preferred
34567 middle hops to use for test circuits. Perhaps this will let me
34568 debug the reachability problems better.
34570 o Log / documentation fixes:
34571 - If we're a server and some peer has a broken TLS certificate, don't
34572 log about it unless ProtocolWarnings is set, i.e., we want to hear
34573 about protocol violations by others.
34574 - Fix spelling of VirtualAddrNetwork in man page.
34575 - Add a better explanation at the top of the autogenerated torrc file
34576 about what happened to our old torrc.
34579 Changes in version 0.1.1.20 - 2006-05-23
34581 - Downgrade a log severity where servers complain that they're
34583 - Avoid a compile warning on FreeBSD.
34584 - Remove string size limit on NEWDESC messages; solve bug 291.
34585 - Correct the RunAsDaemon entry in the man page; ignore RunAsDaemon
34586 more thoroughly when we're running on windows.
34589 Changes in version 0.1.1.19-rc - 2006-05-03
34591 - Regenerate our local descriptor if it's dirty and we try to use
34592 it locally (e.g. if it changes during reachability detection).
34593 - If we setconf our ORPort to 0, we continued to listen on the
34594 old ORPort and receive connections.
34595 - Avoid a second warning about machine/limits.h on Debian
34597 - Be willing to add our own routerinfo into the routerlist.
34598 Now authorities will include themselves in their directories
34599 and network-statuses.
34600 - Stop trying to upload rendezvous descriptors to every
34601 directory authority: only try the v1 authorities.
34602 - Servers no longer complain when they think they're not
34603 registered with the directory authorities. There were too many
34605 - Backport dist-rpm changes so rpms can be built without errors.
34608 - Implement an option, VirtualAddrMask, to set which addresses
34609 get handed out in response to mapaddress requests. This works
34610 around a bug in tsocks where 127.0.0.0/8 is never socksified.
34613 Changes in version 0.1.1.18-rc - 2006-04-10
34615 - Work harder to download live network-statuses from all the
34616 directory authorities we know about. Improve the threshold
34617 decision logic so we're more robust to edge cases.
34618 - When fetching rendezvous descriptors, we were willing to ask
34619 v2 authorities too, which would always return 404.
34622 - Stop listing down or invalid nodes in the v1 directory. This will
34623 reduce its bulk by about 1/3, and reduce load on directory
34625 - When deciding whether a router is Fast or Guard-worthy, consider
34626 his advertised BandwidthRate and not just the BandwidthCapacity.
34627 - No longer ship INSTALL and README files -- they are useless now.
34628 - Force rpmbuild to behave and honor target_cpu.
34629 - Avoid warnings about machine/limits.h on Debian GNU/kFreeBSD.
34630 - Start to include translated versions of the tor-doc-*.html
34631 files, along with the screenshots. Still needs more work.
34632 - Start sending back 512 and 451 errors if mapaddress fails,
34633 rather than not sending anything back at all.
34634 - When we fail to bind or listen on an incoming or outgoing
34635 socket, we should close it before failing. otherwise we just
34636 leak it. (thanks to weasel for finding.)
34637 - Allow "getinfo dir/status/foo" to work, as long as your DirPort
34638 is enabled. (This is a hack, and will be fixed in 0.1.2.x.)
34639 - Make NoPublish (even though deprecated) work again.
34640 - Fix a minor security flaw where a versioning auth dirserver
34641 could list a recommended version many times in a row to make
34642 clients more convinced that it's recommended.
34643 - Fix crash bug if there are two unregistered servers running
34644 with the same nickname, one of them is down, and you ask for
34645 them by nickname in your EntryNodes or ExitNodes. Also, try
34646 to pick the one that's running rather than an arbitrary one.
34647 - Fix an infinite loop we could hit if we go offline for too long.
34648 - Complain when we hit WSAENOBUFS on recv() or write() too.
34649 Perhaps this will help us hunt the bug.
34650 - If you're not a versioning dirserver, don't put the string
34651 "client-versions \nserver-versions \n" in your network-status.
34652 - Lower the minimum required number of file descriptors to 1000,
34653 so we can have some overhead for Valgrind on Linux, where the
34654 default ulimit -n is 1024.
34657 - Add tor.dizum.com as the fifth authoritative directory server.
34658 - Add a new config option FetchUselessDescriptors, off by default,
34659 for when you plan to run "exitlist" on your client and you want
34660 to know about even the non-running descriptors.
34663 Changes in version 0.1.1.17-rc - 2006-03-28
34665 - Clients and servers since 0.1.1.10-alpha have been expiring
34666 connections whenever they are idle for 5 minutes and they *do*
34667 have circuits on them. Oops. With this new version, clients will
34668 discard their previous entry guard choices and avoid choosing
34669 entry guards running these flawed versions.
34670 - Fix memory leak when uncompressing concatenated zlib streams. This
34671 was causing substantial leaks over time on Tor servers.
34672 - The v1 directory was including servers as much as 48 hours old,
34673 because that's how the new routerlist->routers works. Now only
34674 include them if they're 20 hours old or less.
34677 - Resume building on irix64, netbsd 2.0, etc.
34678 - On non-gcc compilers (e.g. solaris), use "-g -O" instead of
34680 - Stop writing the "router.desc" file, ever. Nothing uses it anymore,
34681 and it is confusing some users.
34682 - Mirrors stop caching the v1 directory so often.
34683 - Make the max number of old descriptors that a cache will hold
34684 rise with the number of directory authorities, so we can scale.
34685 - Change our win32 uname() hack to be more forgiving about what
34686 win32 versions it thinks it's found.
34689 - Add lefkada.eecs.harvard.edu as a fourth authoritative directory
34691 - When the controller's *setconf commands fail, collect an error
34692 message in a string and hand it back to the controller.
34693 - Make the v2 dir's "Fast" flag based on relative capacity, just
34694 like "Stable" is based on median uptime. Name everything in the
34695 top 7/8 Fast, and only the top 1/2 gets to be a Guard.
34696 - Log server fingerprint on startup, so new server operators don't
34697 have to go hunting around their filesystem for it.
34698 - Return a robots.txt on our dirport to discourage google indexing.
34699 - Let the controller ask for GETINFO dir/status/foo so it can ask
34700 directly rather than connecting to the dir port. Only works when
34701 dirport is set for now.
34703 o New config options rather than constants in the code:
34704 - SocksTimeout: How long do we let a socks connection wait
34705 unattached before we fail it?
34706 - CircuitBuildTimeout: Cull non-open circuits that were born
34707 at least this many seconds ago.
34708 - CircuitIdleTimeout: Cull open clean circuits that were born
34709 at least this many seconds ago.
34712 Changes in version 0.1.1.16-rc - 2006-03-18
34713 o Bugfixes on 0.1.1.15-rc:
34714 - Fix assert when the controller asks to attachstream a connect-wait
34715 or resolve-wait stream.
34716 - Now do address rewriting when the controller asks us to attach
34717 to a particular circuit too. This will let Blossom specify
34718 "moria2.exit" without having to learn what moria2's IP address is.
34719 - Make the "tor --verify-config" command-line work again, so people
34720 can automatically check if their torrc will parse.
34721 - Authoritative dirservers no longer require an open connection from
34722 a server to consider him "reachable". We need this change because
34723 when we add new auth dirservers, old servers won't know not to
34725 - Let Tor build on Sun CC again.
34726 - Fix an off-by-one buffer size in dirserv.c that magically never
34727 hit our three authorities but broke sjmurdoch's own tor network.
34728 - If we as a directory mirror don't know of any v1 directory
34729 authorities, then don't try to cache any v1 directories.
34730 - Stop warning about unknown servers in our family when they are
34731 given as hex digests.
34732 - Stop complaining as quickly to the server operator that he
34733 hasn't registered his nickname/key binding.
34734 - Various cleanups so we can add new V2 Auth Dirservers.
34735 - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to
34736 reflect the updated flags in our v2 dir protocol.
34737 - Resume allowing non-printable characters for exit streams (both
34738 for connecting and for resolving). Now we tolerate applications
34739 that don't follow the RFCs. But continue to block malformed names
34742 o Bugfixes on 0.1.0.x:
34743 - Fix assert bug in close_logs(): when we close and delete logs,
34744 remove them all from the global "logfiles" list.
34745 - Fix minor integer overflow in calculating when we expect to use up
34746 our bandwidth allocation before hibernating.
34747 - Fix a couple of bugs in OpenSSL detection. Also, deal better when
34748 there are multiple SSLs installed with different versions.
34749 - When we try to be a server and Address is not explicitly set and
34750 our hostname resolves to a private IP address, try to use an
34751 interface address if it has a public address. Now Windows machines
34752 that think of themselves as localhost can work by default.
34755 - Let the controller ask for GETINFO dir/server/foo so it can ask
34756 directly rather than connecting to the dir port.
34757 - Let the controller tell us about certain router descriptors
34758 that it doesn't want Tor to use in circuits. Implement
34759 SETROUTERPURPOSE and modify +POSTDESCRIPTOR to do this.
34760 - New config option SafeSocks to reject all application connections
34761 using unsafe socks protocols. Defaults to off.
34764 Changes in version 0.1.1.15-rc - 2006-03-11
34765 o Bugfixes and cleanups:
34766 - When we're printing strings from the network, don't try to print
34767 non-printable characters. This protects us against shell escape
34768 sequence exploits, and also against attacks to fool humans into
34769 misreading their logs.
34770 - Fix a bug where Tor would fail to establish any connections if you
34771 left it off for 24 hours and then started it: we were happy with
34772 the obsolete network statuses, but they all referred to router
34773 descriptors that were too old to fetch, so we ended up with no
34774 valid router descriptors.
34775 - Fix a seg fault in the controller's "getinfo orconn-status"
34776 command while listing status on incoming handshaking connections.
34777 Introduce a status name "NEW" for these connections.
34778 - If we get a linelist or linelist_s config option from the torrc
34779 (e.g. ExitPolicy) and it has no value, warn and skip rather than
34780 silently resetting it to its default.
34781 - Don't abandon entry guards until they've been down or gone for
34783 - Cleaner and quieter log messages.
34786 - New controller signal NEWNYM that makes new application requests
34787 use clean circuits.
34788 - Add a new circuit purpose 'controller' to let the controller ask
34789 for a circuit that Tor won't try to use. Extend the EXTENDCIRCUIT
34790 controller command to let you specify the purpose if you're
34791 starting a new circuit. Add a new SETCIRCUITPURPOSE controller
34792 command to let you change a circuit's purpose after it's been
34794 - Accept "private:*" in routerdesc exit policies; not generated yet
34795 because older Tors do not understand it.
34796 - Add BSD-style contributed startup script "rc.subr" from Peter
34800 Changes in version 0.1.1.14-alpha - 2006-02-20
34801 o Bugfixes on 0.1.1.x:
34802 - Don't die if we ask for a stdout or stderr log (even implicitly)
34803 and we're set to RunAsDaemon -- just warn.
34804 - We still had a few bugs in the OR connection rotation code that
34805 caused directory servers to slowly aggregate connections to other
34806 fast Tor servers. This time for sure!
34807 - Make log entries on Win32 include the name of the function again.
34808 - We were treating a pair of exit policies if they were equal even
34809 if one said accept and the other said reject -- causing us to
34810 not always publish a new descriptor since we thought nothing
34812 - Retry pending server downloads as well as pending networkstatus
34813 downloads when we unexpectedly get a socks request.
34814 - We were ignoring the IS_FAST flag in the directory status,
34815 meaning we were willing to pick trivial-bandwidth nodes for "fast"
34817 - If the controller's SAVECONF command fails (e.g. due to file
34818 permissions), let the controller know that it failed.
34821 - If we're trying to be a Tor server and running Windows 95/98/ME
34822 as a server, explain that we'll likely crash.
34823 - When we're a server, a client asks for an old-style directory,
34824 and our write bucket is empty, don't give it to him. This way
34825 small servers can continue to serve the directory *sometimes*,
34826 without getting overloaded.
34827 - Compress exit policies even more -- look for duplicate lines
34829 - Clients now honor the "guard" flag in the router status when
34830 picking entry guards, rather than looking at is_fast or is_stable.
34831 - Retain unrecognized lines in $DATADIR/state file, so that we can
34832 be forward-compatible.
34833 - Generate 18.0.0.0/8 address policy format in descs when we can;
34834 warn when the mask is not reducible to a bit-prefix.
34835 - Let the user set ControlListenAddress in the torrc. This can be
34836 dangerous, but there are some cases (like a secured LAN) where it
34838 - Split ReachableAddresses into ReachableDirAddresses and
34839 ReachableORAddresses, so we can restrict Dir conns to port 80
34840 and OR conns to port 443.
34841 - Now we can target arch and OS in rpm builds (contributed by
34842 Phobos). Also make the resulting dist-rpm filename match the
34844 - New config options to help controllers: FetchServerDescriptors
34845 and FetchHidServDescriptors for whether to fetch server
34846 info and hidserv info or let the controller do it, and
34847 PublishServerDescriptor and PublishHidServDescriptors.
34848 - Also let the controller set the __AllDirActionsPrivate config
34849 option if you want all directory fetches/publishes to happen via
34850 Tor (it assumes your controller bootstraps your circuits).
34853 Changes in version 0.1.0.17 - 2006-02-17
34854 o Crash bugfixes on 0.1.0.x:
34855 - When servers with a non-zero DirPort came out of hibernation,
34856 sometimes they would trigger an assert.
34858 o Other important bugfixes:
34859 - On platforms that don't have getrlimit (like Windows), we were
34860 artificially constraining ourselves to a max of 1024
34861 connections. Now just assume that we can handle as many as 15000
34862 connections. Hopefully this won't cause other problems.
34864 o Backported features:
34865 - When we're a server, a client asks for an old-style directory,
34866 and our write bucket is empty, don't give it to him. This way
34867 small servers can continue to serve the directory *sometimes*,
34868 without getting overloaded.
34869 - Whenever you get a 503 in response to a directory fetch, try
34870 once more. This will become important once servers start sending
34871 503's whenever they feel busy.
34872 - Fetch a new directory every 120 minutes, not every 40 minutes.
34873 Now that we have hundreds of thousands of users running the old
34874 directory algorithm, it's starting to hurt a lot.
34875 - Bump up the period for forcing a hidden service descriptor upload
34876 from 20 minutes to 1 hour.
34879 Changes in version 0.1.1.13-alpha - 2006-02-09
34880 o Crashes in 0.1.1.x:
34881 - When you tried to setconf ORPort via the controller, Tor would
34882 crash. So people using TorCP to become a server were sad.
34883 - Solve (I hope) the stack-smashing bug that we were seeing on fast
34884 servers. The problem appears to be something do with OpenSSL's
34885 random number generation, or how we call it, or something. Let me
34886 know if the crashes continue.
34887 - Turn crypto hardware acceleration off by default, until we find
34888 somebody smart who can test it for us. (It appears to produce
34889 seg faults in at least some cases.)
34890 - Fix a rare assert error when we've tried all intro points for
34891 a hidden service and we try fetching the service descriptor again:
34892 "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed"
34895 - Fix a major load balance bug: we were round-robining in 16 KB
34896 chunks, and servers with bandwidthrate of 20 KB, while downloading
34897 a 600 KB directory, would starve their other connections. Now we
34898 try to be a bit more fair.
34899 - Dir authorities and mirrors were never expiring the newest
34900 descriptor for each server, causing memory and directory bloat.
34901 - Fix memory-bloating and connection-bloating bug on servers: We
34902 were never closing any connection that had ever had a circuit on
34903 it, because we were checking conn->n_circuits == 0, yet we had a
34904 bug that let it go negative.
34905 - Make Tor work using squid as your http proxy again -- squid
34906 returns an error if you ask for a URL that's too long, and it uses
34907 a really generic error message. Plus, many people are behind a
34908 transparent squid so they don't even realize it.
34909 - On platforms that don't have getrlimit (like Windows), we were
34910 artificially constraining ourselves to a max of 1024
34911 connections. Now just assume that we can handle as many as 15000
34912 connections. Hopefully this won't cause other problems.
34913 - Add a new config option ExitPolicyRejectPrivate which defaults to
34914 1. This means all exit policies will begin with rejecting private
34915 addresses, unless the server operator explicitly turns it off.
34918 - Clients no longer download descriptors for non-running
34920 - Before we add new directory authorities, we should make it
34921 clear that only v1 authorities should receive/publish hidden
34922 service descriptors.
34925 - As soon as we've fetched some more directory info, immediately
34926 try to download more server descriptors. This way we don't have
34927 a 10 second pause during initial bootstrapping.
34928 - Remove even more loud log messages that the server operator can't
34930 - When we're running an obsolete or un-recommended version, make
34931 the log message more clear about what the problem is and what
34932 versions *are* still recommended.
34933 - Provide a more useful warn message when our onion queue gets full:
34934 the CPU is too slow or the exit policy is too liberal.
34935 - Don't warn when we receive a 503 from a dirserver/cache -- this
34936 will pave the way for them being able to refuse if they're busy.
34937 - When we fail to bind a listener, try to provide a more useful
34938 log message: e.g., "Is Tor already running?"
34939 - Adjust tor-spec to parameterize cell and key lengths. Now Ian
34940 Goldberg can prove things about our handshake protocol more
34942 - MaxConn has been obsolete for a while now. Document the ConnLimit
34943 config option, which is a *minimum* number of file descriptors
34944 that must be available else Tor refuses to start.
34945 - Apply Matt Ghali's --with-syslog-facility patch to ./configure
34946 if you log to syslog and want something other than LOG_DAEMON.
34947 - Make dirservers generate a separate "guard" flag to mean,
34948 "would make a good entry guard". Make clients parse it and vote
34949 on it. Not used by clients yet.
34950 - Implement --with-libevent-dir option to ./configure. Also, improve
34951 search techniques to find libevent, and use those for openssl too.
34952 - Bump the default bandwidthrate to 3 MB, and burst to 6 MB
34953 - Only start testing reachability once we've established a
34954 circuit. This will make startup on dirservers less noisy.
34955 - Don't try to upload hidden service descriptors until we have
34956 established a circuit.
34957 - Fix the controller's "attachstream 0" command to treat conn like
34958 it just connected, doing address remapping, handling .exit and
34959 .onion idioms, and so on. Now we're more uniform in making sure
34960 that the controller hears about new and closing connections.
34963 Changes in version 0.1.1.12-alpha - 2006-01-11
34964 o Bugfixes on 0.1.1.x:
34965 - The fix to close duplicate server connections was closing all
34966 Tor client connections if they didn't establish a circuit
34967 quickly enough. Oops.
34968 - Fix minor memory issue (double-free) that happened on exit.
34970 o Bugfixes on 0.1.0.x:
34971 - Tor didn't warn when it failed to open a log file.
34974 Changes in version 0.1.1.11-alpha - 2006-01-10
34975 o Crashes in 0.1.1.x:
34976 - Include all the assert/crash fixes from 0.1.0.16.
34977 - If you start Tor and then quit very quickly, there were some
34978 races that tried to free things that weren't allocated yet.
34979 - Fix a rare memory stomp if you're running hidden services.
34980 - Fix segfault when specifying DirServer in config without nickname.
34981 - Fix a seg fault when you finish connecting to a server but at
34982 that moment you dump his server descriptor.
34983 - Extendcircuit and Attachstream controller commands would
34984 assert/crash if you don't give them enough arguments.
34985 - Fix an assert error when we're out of space in the connection_list
34986 and we try to post a hidden service descriptor (reported by weasel).
34987 - If you specify a relative torrc path and you set RunAsDaemon in
34988 your torrc, then it chdir()'s to the new directory. If you HUP,
34989 it tries to load the new torrc location, fails, and exits.
34990 The fix: no longer allow a relative path to torrc using -f.
34993 - Implement "entry guards": automatically choose a handful of entry
34994 nodes and stick with them for all circuits. Only pick new guards
34995 when the ones you have are unsuitable, and if the old guards
34996 become suitable again, switch back. This will increase security
34997 dramatically against certain end-point attacks. The EntryNodes
34998 config option now provides some hints about which entry guards you
34999 want to use most; and StrictEntryNodes means to only use those.
35000 - New directory logic: download by descriptor digest, not by
35001 fingerprint. Caches try to download all listed digests from
35002 authorities; clients try to download "best" digests from caches.
35003 This avoids partitioning and isolating attacks better.
35004 - Make the "stable" router flag in network-status be the median of
35005 the uptimes of running valid servers, and make clients pay
35006 attention to the network-status flags. Thus the cutoff adapts
35007 to the stability of the network as a whole, making IRC, IM, etc
35008 connections more reliable.
35011 - Tor servers with dynamic IP addresses were needing to wait 18
35012 hours before they could start doing reachability testing using
35013 the new IP address and ports. This is because they were using
35014 the internal descriptor to learn what to test, yet they were only
35015 rebuilding the descriptor once they decided they were reachable.
35016 - Tor 0.1.1.9 and 0.1.1.10 had a serious bug that caused clients
35017 to download certain server descriptors, throw them away, and then
35018 fetch them again after 30 minutes. Now mirrors throw away these
35019 server descriptors so clients can't get them.
35020 - We were leaving duplicate connections to other ORs open for a week,
35021 rather than closing them once we detect a duplicate. This only
35022 really affected authdirservers, but it affected them a lot.
35023 - Spread the authdirservers' reachability testing over the entire
35024 testing interval, so we don't try to do 500 TLS's at once every
35028 - If the network is down, and we try to connect to a conn because
35029 we have a circuit in mind, and we timeout (30 seconds) because the
35030 network never answers, we were expiring the circuit, but we weren't
35031 obsoleting the connection or telling the entry_guards functions.
35032 - Some Tor servers process billions of cells per day. These statistics
35033 need to be uint64_t's.
35034 - Check for integer overflows in more places, when adding elements
35035 to smartlists. This could possibly prevent a buffer overflow
35036 on malicious huge inputs. I don't see any, but I haven't looked
35038 - ReachableAddresses kept growing new "reject *:*" lines on every
35040 - When you "setconf log" via the controller, it should remove all
35041 logs. We were automatically adding back in a "log notice stdout".
35042 - Newly bootstrapped Tor networks couldn't establish hidden service
35043 circuits until they had nodes with high uptime. Be more tolerant.
35044 - We were marking servers down when they could not answer every piece
35045 of the directory request we sent them. This was far too harsh.
35046 - Fix the torify (tsocks) config file to not use Tor for localhost
35048 - Directory authorities now go to the proper authority when asking for
35049 a networkstatus, even when they want a compressed one.
35050 - Fix a harmless bug that was causing Tor servers to log
35051 "Got an end because of misc error, but we're not an AP. Closing."
35052 - Authorities were treating their own descriptor changes as cosmetic,
35053 meaning the descriptor available in the network-status and the
35054 descriptor that clients downloaded were different.
35055 - The OS X installer was adding a symlink for tor_resolve but
35056 the binary was called tor-resolve (reported by Thomas Hardly).
35057 - Workaround a problem with some http proxies where they refuse GET
35058 requests that specify "Content-Length: 0" (reported by Adrian).
35059 - Fix wrong log message when you add a "HiddenServiceNodes" config
35060 line without any HiddenServiceDir line (reported by Chris Thomas).
35063 - Write the TorVersion into the state file so we have a prayer of
35064 keeping forward and backward compatibility.
35065 - Revive the FascistFirewall config option rather than eliminating it:
35066 now it's a synonym for ReachableAddresses *:80,*:443.
35067 - Clients choose directory servers from the network status lists,
35068 not from their internal list of router descriptors. Now they can
35069 go to caches directly rather than needing to go to authorities
35071 - Directory authorities ignore router descriptors that have only
35072 cosmetic differences: do this for 0.1.0.x servers now too.
35073 - Add a new flag to network-status indicating whether the server
35074 can answer v2 directory requests too.
35075 - Authdirs now stop whining so loudly about bad descriptors that
35076 they fetch from other dirservers. So when there's a log complaint,
35077 it's for sure from a freshly uploaded descriptor.
35078 - Reduce memory requirements in our structs by changing the order
35080 - There used to be two ways to specify your listening ports in a
35081 server descriptor: on the "router" line and with a separate "ports"
35082 line. Remove support for the "ports" line.
35083 - New config option "AuthDirRejectUnlisted" for auth dirservers as
35084 a panic button: if we get flooded with unusable servers we can
35085 revert to only listing servers in the approved-routers file.
35086 - Auth dir servers can now mark a fingerprint as "!reject" or
35087 "!invalid" in the approved-routers file (as its nickname), to
35088 refuse descriptors outright or include them but marked as invalid.
35089 - Servers store bandwidth history across restarts/crashes.
35090 - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can
35091 get a better idea of why their circuits failed. Not used yet.
35092 - Directory mirrors now cache up to 16 unrecognized network-status
35093 docs. Now we can add new authdirservers and they'll be cached too.
35094 - When picking a random directory, prefer non-authorities if any
35096 - New controller option "getinfo desc/all-recent" to fetch the
35097 latest server descriptor for every router that Tor knows about.
35100 Changes in version 0.1.0.16 - 2006-01-02
35101 o Crash bugfixes on 0.1.0.x:
35102 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
35103 corrupting the heap, losing FDs, or crashing when we need to resize
35104 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
35105 - It turns out sparc64 platforms crash on unaligned memory access
35106 too -- so detect and avoid this.
35107 - Handle truncated compressed data correctly (by detecting it and
35109 - Fix possible-but-unlikely free(NULL) in control.c.
35110 - When we were closing connections, there was a rare case that
35111 stomped on memory, triggering seg faults and asserts.
35112 - Avoid potential infinite recursion when building a descriptor. (We
35113 don't know that it ever happened, but better to fix it anyway.)
35114 - We were neglecting to unlink marked circuits from soon-to-close OR
35115 connections, which caused some rare scribbling on freed memory.
35116 - Fix a memory stomping race bug when closing the joining point of two
35117 rendezvous circuits.
35118 - Fix an assert in time parsing found by Steven Murdoch.
35120 o Other bugfixes on 0.1.0.x:
35121 - When we're doing reachability testing, provide more useful log
35122 messages so the operator knows what to expect.
35123 - Do not check whether DirPort is reachable when we are suppressing
35124 advertising it because of hibernation.
35125 - When building with -static or on Solaris, we sometimes needed -ldl.
35126 - When we're deciding whether a stream has enough circuits around
35127 that can handle it, count the freshly dirty ones and not the ones
35128 that are so dirty they won't be able to handle it.
35129 - When we're expiring old circuits, we had a logic error that caused
35130 us to close new rendezvous circuits rather than old ones.
35131 - Give a more helpful log message when you try to change ORPort via
35132 the controller: you should upgrade Tor if you want that to work.
35133 - We were failing to parse Tor versions that start with "Tor ".
35134 - Tolerate faulty streams better: when a stream fails for reason
35135 exitpolicy, stop assuming that the router is lying about his exit
35136 policy. When a stream fails for reason misc, allow it to retry just
35137 as if it was resolvefailed. When a stream has failed three times,
35138 reset its failure count so we can try again and get all three tries.
35141 Changes in version 0.1.1.10-alpha - 2005-12-11
35142 o Correctness bugfixes on 0.1.0.x:
35143 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
35144 corrupting the heap, losing FDs, or crashing when we need to resize
35145 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
35146 - Stop doing the complex voodoo overkill checking for insecure
35147 Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy.
35148 - When we were closing connections, there was a rare case that
35149 stomped on memory, triggering seg faults and asserts.
35150 - We were neglecting to unlink marked circuits from soon-to-close OR
35151 connections, which caused some rare scribbling on freed memory.
35152 - When we're deciding whether a stream has enough circuits around
35153 that can handle it, count the freshly dirty ones and not the ones
35154 that are so dirty they won't be able to handle it.
35155 - Recover better from TCP connections to Tor servers that are
35156 broken but don't tell you (it happens!); and rotate TLS
35157 connections once a week.
35158 - When we're expiring old circuits, we had a logic error that caused
35159 us to close new rendezvous circuits rather than old ones.
35160 - Fix a scary-looking but apparently harmless bug where circuits
35161 would sometimes start out in state CIRCUIT_STATE_OR_WAIT at
35162 servers, and never switch to state CIRCUIT_STATE_OPEN.
35163 - When building with -static or on Solaris, we sometimes needed to
35165 - Give a useful message when people run Tor as the wrong user,
35166 rather than telling them to start chowning random directories.
35167 - We were failing to inform the controller about new .onion streams.
35169 o Security bugfixes on 0.1.0.x:
35170 - Refuse server descriptors if the fingerprint line doesn't match
35171 the included identity key. Tor doesn't care, but other apps (and
35172 humans) might actually be trusting the fingerprint line.
35173 - We used to kill the circuit when we receive a relay command we
35174 don't recognize. Now we just drop it.
35175 - Start obeying our firewall options more rigorously:
35176 . If we can't get to a dirserver directly, try going via Tor.
35177 . Don't ever try to connect (as a client) to a place our
35178 firewall options forbid.
35179 . If we specify a proxy and also firewall options, obey the
35180 firewall options even when we're using the proxy: some proxies
35181 can only proxy to certain destinations.
35182 - Fix a bug found by Lasse Overlier: when we were making internal
35183 circuits (intended to be cannibalized later for rendezvous and
35184 introduction circuits), we were picking them so that they had
35185 useful exit nodes. There was no need for this, and it actually
35186 aids some statistical attacks.
35187 - Start treating internal circuits and exit circuits separately.
35188 It's important to keep them separate because internal circuits
35189 have their last hops picked like middle hops, rather than like
35190 exit hops. So exiting on them will break the user's expectations.
35192 o Bugfixes on 0.1.1.x:
35193 - Take out the mis-feature where we tried to detect IP address
35194 flapping for people with DynDNS, and chose not to upload a new
35195 server descriptor sometimes.
35196 - Try to be compatible with OpenSSL 0.9.6 again.
35197 - Log fix: when the controller is logging about .onion addresses,
35198 sometimes it didn't include the ".onion" part of the address.
35199 - Don't try to modify options->DirServers internally -- if the
35200 user didn't specify any, just add the default ones directly to
35201 the trusted dirserver list. This fixes a bug where people running
35202 controllers would use SETCONF on some totally unrelated config
35203 option, and Tor would start yelling at them about changing their
35205 - Let the controller's redirectstream command specify a port, in
35206 case the controller wants to change that too.
35207 - When we requested a pile of server descriptors, we sometimes
35208 accidentally launched a duplicate request for the first one.
35209 - Bugfix for trackhostexits: write down the fingerprint of the
35210 chosen exit, not its nickname, because the chosen exit might not
35212 - When parsing foo.exit, if foo is unknown, and we are leaving
35213 circuits unattached, set the chosen_exit field and leave the
35214 address empty. This matters because controllers got confused
35216 - Directory authorities no longer try to download server
35217 descriptors that they know they will reject.
35219 o Features and updates:
35220 - Replace balanced trees with hash tables: this should make stuff
35221 significantly faster.
35222 - Resume using the AES counter-mode implementation that we ship,
35223 rather than OpenSSL's. Ours is significantly faster.
35224 - Many other CPU and memory improvements.
35225 - Add a new config option FastFirstHopPK (on by default) so clients
35226 do a trivial crypto handshake for their first hop, since TLS has
35227 already taken care of confidentiality and authentication.
35228 - Add a new config option TestSocks so people can see if their
35229 applications are using socks4, socks4a, socks5-with-ip, or
35230 socks5-with-hostname. This way they don't have to keep mucking
35231 with tcpdump and wondering if something got cached somewhere.
35232 - Warn when listening on a public address for socks. I suspect a
35233 lot of people are setting themselves up as open socks proxies,
35234 and they have no idea that jerks on the Internet are using them,
35235 since they simply proxy the traffic into the Tor network.
35236 - Add "private:*" as an alias in configuration for policies. Now
35237 you can simplify your exit policy rather than needing to list
35238 every single internal or nonroutable network space.
35239 - Add a new controller event type that allows controllers to get
35240 all server descriptors that were uploaded to a router in its role
35241 as authoritative dirserver.
35242 - Start shipping socks-extensions.txt, tor-doc-unix.html,
35243 tor-doc-server.html, and stylesheet.css in the tarball.
35244 - Stop shipping tor-doc.html in the tarball.
35247 Changes in version 0.1.1.9-alpha - 2005-11-15
35248 o Usability improvements:
35249 - Start calling it FooListenAddress rather than FooBindAddress,
35250 since few of our users know what it means to bind an address
35252 - Reduce clutter in server logs. We're going to try to make
35253 them actually usable now. New config option ProtocolWarnings that
35254 lets you hear about how _other Tors_ are breaking the protocol. Off
35256 - Divide log messages into logging domains. Once we put some sort
35257 of interface on this, it will let people looking at more verbose
35258 log levels specify the topics they want to hear more about.
35259 - Make directory servers return better http 404 error messages
35260 instead of a generic "Servers unavailable".
35261 - Check for even more Windows version flags when writing the platform
35262 string in server descriptors, and note any we don't recognize.
35263 - Clean up more of the OpenSSL memory when exiting, so we can detect
35264 memory leaks better.
35265 - Make directory authorities be non-versioning, non-naming by
35266 default. Now we can add new directory servers without requiring
35267 their operators to pay close attention.
35268 - When logging via syslog, include the pid whenever we provide
35269 a log entry. Suggested by Todd Fries.
35271 o Performance improvements:
35272 - Directory servers now silently throw away new descriptors that
35273 haven't changed much if the timestamps are similar. We do this to
35274 tolerate older Tor servers that upload a new descriptor every 15
35275 minutes. (It seemed like a good idea at the time.)
35276 - Inline bottleneck smartlist functions; use fast versions by default.
35277 - Add a "Map from digest to void*" abstraction digestmap_t so we
35278 can do less hex encoding/decoding. Use it in router_get_by_digest()
35279 to resolve a performance bottleneck.
35280 - Allow tor_gzip_uncompress to extract as much as possible from
35281 truncated compressed data. Try to extract as many
35282 descriptors as possible from truncated http responses (when
35283 DIR_PURPOSE_FETCH_ROUTERDESC).
35284 - Make circ->onionskin a pointer, not a static array. moria2 was using
35285 125000 circuit_t's after it had been up for a few weeks, which
35286 translates to 20+ megs of wasted space.
35287 - The private half of our EDH handshake keys are now chosen out
35288 of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.)
35290 o Security improvements:
35291 - Start making directory caches retain old routerinfos, so soon
35292 clients can start asking by digest of descriptor rather than by
35293 fingerprint of server.
35294 - Add half our entropy from RAND_poll in OpenSSL. This knows how
35295 to use egd (if present), openbsd weirdness (if present), vms/os2
35296 weirdness (if we ever port there), and more in the future.
35298 o Bugfixes on 0.1.0.x:
35299 - Do round-robin writes of at most 16 kB per write. This might be
35300 more fair on loaded Tor servers, and it might resolve our Windows
35301 crash bug. It might also slow things down.
35302 - Our TLS handshakes were generating a single public/private
35303 keypair for the TLS context, rather than making a new one for
35304 each new connections. Oops. (But we were still rotating them
35305 periodically, so it's not so bad.)
35306 - When we were cannibalizing a circuit with a particular exit
35307 node in mind, we weren't checking to see if that exit node was
35308 already present earlier in the circuit. Oops.
35309 - When a Tor server's IP changes (e.g. from a dyndns address),
35310 upload a new descriptor so clients will learn too.
35311 - Really busy servers were keeping enough circuits open on stable
35312 connections that they were wrapping around the circuit_id
35313 space. (It's only two bytes.) This exposed a bug where we would
35314 feel free to reuse a circuit_id even if it still exists but has
35315 been marked for close. Try to fix this bug. Some bug remains.
35316 - If we would close a stream early (e.g. it asks for a .exit that
35317 we know would refuse it) but the LeaveStreamsUnattached config
35318 option is set by the controller, then don't close it.
35320 o Bugfixes on 0.1.1.8-alpha:
35321 - Fix a big pile of memory leaks, some of them serious.
35322 - Do not try to download a routerdesc if we would immediately reject
35324 - Resume inserting a newline between all router descriptors when
35325 generating (old style) signed directories, since our spec says
35327 - When providing content-type application/octet-stream for
35328 server descriptors using .z, we were leaving out the
35329 content-encoding header. Oops. (Everything tolerated this just
35330 fine, but that doesn't mean we need to be part of the problem.)
35331 - Fix a potential seg fault in getconf and getinfo using version 1
35332 of the controller protocol.
35333 - Avoid crash: do not check whether DirPort is reachable when we
35334 are suppressing it because of hibernation.
35335 - Make --hash-password not crash on exit.
35338 Changes in version 0.1.1.8-alpha - 2005-10-07
35339 o New features (major):
35340 - Clients don't download or use the directory anymore. Now they
35341 download and use network-statuses from the trusted dirservers,
35342 and fetch individual server descriptors as needed from mirrors.
35343 See dir-spec.txt for all the gory details.
35344 - Be more conservative about whether to advertise our DirPort.
35345 The main change is to not advertise if we're running at capacity
35346 and either a) we could hibernate or b) our capacity is low and
35347 we're using a default DirPort.
35348 - Use OpenSSL's AES when OpenSSL has version 0.9.7 or later.
35350 o New features (minor):
35351 - Try to be smart about when to retry network-status and
35352 server-descriptor fetches. Still needs some tuning.
35353 - Stop parsing, storing, or using running-routers output (but
35354 mirrors still cache and serve it).
35355 - Consider a threshold of versioning dirservers (dirservers who have
35356 an opinion about which Tor versions are still recommended) before
35357 deciding whether to warn the user that he's obsolete.
35358 - Dirservers can now reject/invalidate by key and IP, with the
35359 config options "AuthDirInvalid" and "AuthDirReject". This is
35360 useful since currently we automatically list servers as running
35361 and usable even if we know they're jerks.
35362 - Provide dire warnings to any users who set DirServer; move it out
35363 of torrc.sample and into torrc.complete.
35364 - Add MyFamily to torrc.sample in the server section.
35365 - Add nicknames to the DirServer line, so we can refer to them
35366 without requiring all our users to memorize their IP addresses.
35367 - When we get an EOF or a timeout on a directory connection, note
35368 how many bytes of serverdesc we are dropping. This will help
35369 us determine whether it is smart to parse incomplete serverdesc
35371 - Add a new function to "change pseudonyms" -- that is, to stop
35372 using any currently-dirty circuits for new streams, so we don't
35373 link new actions to old actions. Currently it's only called on
35374 HUP (or SIGNAL RELOAD).
35375 - On sighup, if UseHelperNodes changed to 1, use new circuits.
35376 - Start using RAND_bytes rather than RAND_pseudo_bytes from
35377 OpenSSL. Also, reseed our entropy every hour, not just at
35378 startup. And entropy in 512-bit chunks, not 160-bit chunks.
35380 o Fixes on 0.1.1.7-alpha:
35381 - Nobody ever implemented EVENT_ADDRMAP for control protocol
35382 version 0, so don't let version 0 controllers ask for it.
35383 - If you requested something with too many newlines via the
35384 v1 controller protocol, you could crash tor.
35385 - Fix a number of memory leaks, including some pretty serious ones.
35386 - Re-enable DirPort testing again, so Tor servers will be willing
35387 to advertise their DirPort if it's reachable.
35388 - On TLS handshake, only check the other router's nickname against
35389 its expected nickname if is_named is set.
35391 o Fixes forward-ported from 0.1.0.15:
35392 - Don't crash when we don't have any spare file descriptors and we
35393 try to spawn a dns or cpu worker.
35394 - Make the numbers in read-history and write-history into uint64s,
35395 so they don't overflow and publish negatives in the descriptor.
35397 o Fixes on 0.1.0.x:
35398 - For the OS X package's modified privoxy config file, comment
35399 out the "logfile" line so we don't log everything passed
35401 - We were whining about using socks4 or socks5-with-local-lookup
35402 even when it's an IP in the "virtual" range we designed exactly
35404 - We were leaking some memory every time the client changes IPs.
35405 - Never call free() on tor_malloc()d memory. This will help us
35406 use dmalloc to detect memory leaks.
35407 - Check for named servers when looking them up by nickname;
35408 warn when we'recalling a non-named server by its nickname;
35409 don't warn twice about the same name.
35410 - Try to list MyFamily elements by key, not by nickname, and warn
35411 if we've not heard of the server.
35412 - Make windows platform detection (uname equivalent) smarter.
35413 - It turns out sparc64 doesn't like unaligned access either.
35416 Changes in version 0.1.0.15 - 2005-09-23
35417 o Bugfixes on 0.1.0.x:
35418 - Reject ports 465 and 587 (spam targets) in default exit policy.
35419 - Don't crash when we don't have any spare file descriptors and we
35420 try to spawn a dns or cpu worker.
35421 - Get rid of IgnoreVersion undocumented config option, and make us
35422 only warn, never exit, when we're running an obsolete version.
35423 - Don't try to print a null string when your server finds itself to
35424 be unreachable and the Address config option is empty.
35425 - Make the numbers in read-history and write-history into uint64s,
35426 so they don't overflow and publish negatives in the descriptor.
35427 - Fix a minor memory leak in smartlist_string_remove().
35428 - We were only allowing ourselves to upload a server descriptor at
35429 most every 20 minutes, even if it changed earlier than that.
35430 - Clean up log entries that pointed to old URLs.
35433 Changes in version 0.1.1.7-alpha - 2005-09-14
35434 o Fixes on 0.1.1.6-alpha:
35435 - Exit servers were crashing when people asked them to make a
35436 connection to an address not in their exit policy.
35437 - Looking up a non-existent stream for a v1 control connection would
35439 - Fix a seg fault if we ask a dirserver for a descriptor by
35440 fingerprint but he doesn't know about him.
35441 - SETCONF was appending items to linelists, not clearing them.
35442 - SETCONF SocksBindAddress killed Tor if it fails to bind. Now back
35443 out and refuse the setconf if it would fail.
35444 - Downgrade the dirserver log messages when whining about
35448 - Add Peter Palfrader's check-tor script to tor/contrib/
35449 It lets you easily check whether a given server (referenced by
35450 nickname) is reachable by you.
35451 - Numerous changes to move towards client-side v2 directories. Not
35454 o Fixes on 0.1.0.x:
35455 - If the user gave tor an odd number of command-line arguments,
35456 we were silently ignoring the last one. Now we complain and fail.
35457 [This wins the oldest-bug prize -- this bug has been present since
35458 November 2002, as released in Tor 0.0.0.]
35459 - Do not use unaligned memory access on alpha, mips, or mipsel.
35460 It *works*, but is very slow, so we treat them as if it doesn't.
35461 - Retry directory requests if we fail to get an answer we like
35462 from a given dirserver (we were retrying before, but only if
35463 we fail to connect).
35464 - When writing the RecommendedVersions line, sort them first.
35465 - When the client asked for a rendezvous port that the hidden
35466 service didn't want to provide, we were sending an IP address
35467 back along with the end cell. Fortunately, it was zero. But stop
35469 - Correct "your server is reachable" log entries to indicate that
35470 it was self-testing that told us so.
35473 Changes in version 0.1.1.6-alpha - 2005-09-09
35474 o Fixes on 0.1.1.5-alpha:
35475 - We broke fascistfirewall in 0.1.1.5-alpha. Oops.
35476 - Fix segfault in unit tests in 0.1.1.5-alpha. Oops.
35477 - Fix bug with tor_memmem finding a match at the end of the string.
35478 - Make unit tests run without segfaulting.
35479 - Resolve some solaris x86 compile warnings.
35480 - Handle duplicate lines in approved-routers files without warning.
35481 - Fix bug where as soon as a server refused any requests due to his
35482 exit policy (e.g. when we ask for localhost and he tells us that's
35483 127.0.0.1 and he won't do it), we decided he wasn't obeying his
35484 exit policy using him for any exits.
35485 - Only do openssl hardware accelerator stuff if openssl version is
35488 o New controller features/fixes:
35489 - Add a "RESETCONF" command so you can set config options like
35490 AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
35491 a config option in the torrc with no value, then it clears it
35492 entirely (rather than setting it to its default).
35493 - Add a "GETINFO config-file" to tell us where torrc is.
35494 - Avoid sending blank lines when GETINFO replies should be empty.
35495 - Add a QUIT command for the controller (for using it manually).
35496 - Fix a bug in SAVECONF that was adding default dirservers and
35497 other redundant entries to the torrc file.
35499 o Start on the new directory design:
35500 - Generate, publish, cache, serve new network-status format.
35501 - Publish individual descriptors (by fingerprint, by "all", and by
35503 - Publish client and server recommended versions separately.
35504 - Allow tor_gzip_uncompress() to handle multiple concatenated
35505 compressed strings. Serve compressed groups of router
35506 descriptors. The compression logic here could be more
35508 - Distinguish v1 authorities (all currently trusted directories)
35509 from v2 authorities (all trusted directories).
35510 - Change DirServers config line to note which dirs are v1 authorities.
35511 - Add configuration option "V1AuthoritativeDirectory 1" which
35512 moria1, moria2, and tor26 should set.
35513 - Remove option when getting directory cache to see whether they
35514 support running-routers; they all do now. Replace it with one
35515 to see whether caches support v2 stuff.
35518 - Dirservers now do their own external reachability testing of each
35519 Tor server, and only list them as running if they've been found to
35520 be reachable. We also send back warnings to the server's logs if
35521 it uploads a descriptor that we already believe is unreachable.
35522 - Implement exit enclaves: if we know an IP address for the
35523 destination, and there's a running Tor server at that address
35524 which allows exit to the destination, then extend the circuit to
35525 that exit first. This provides end-to-end encryption and end-to-end
35526 authentication. Also, if the user wants a .exit address or enclave,
35527 use 4 hops rather than 3, and cannibalize a general circ for it
35529 - Permit transitioning from ORPort=0 to ORPort!=0, and back, from the
35530 controller. Also, rotate dns and cpu workers if the controller
35531 changes options that will affect them; and initialize the dns
35532 worker cache tree whether or not we start out as a server.
35533 - Only upload a new server descriptor when options change, 18
35534 hours have passed, uptime is reset, or bandwidth changes a lot.
35535 - Check [X-]Forwarded-For headers in HTTP requests when generating
35536 log messages. This lets people run dirservers (and caches) behind
35537 Apache but still know which IP addresses are causing warnings.
35539 o Config option changes:
35540 - Replace (Fascist)Firewall* config options with a new
35541 ReachableAddresses option that understands address policies.
35542 For example, "ReachableAddresses *:80,*:443"
35543 - Get rid of IgnoreVersion undocumented config option, and make us
35544 only warn, never exit, when we're running an obsolete version.
35545 - Make MonthlyAccountingStart config option truly obsolete now.
35547 o Fixes on 0.1.0.x:
35548 - Reject ports 465 and 587 in the default exit policy, since
35549 people have started using them for spam too.
35550 - It turns out we couldn't bootstrap a network since we added
35551 reachability detection in 0.1.0.1-rc. Good thing the Tor network
35552 has never gone down. Add an AssumeReachable config option to let
35553 servers and dirservers bootstrap. When we're trying to build a
35554 high-uptime or high-bandwidth circuit but there aren't enough
35555 suitable servers, try being less picky rather than simply failing.
35556 - Our logic to decide if the OR we connected to was the right guy
35557 was brittle and maybe open to a mitm for unverified routers.
35558 - We weren't cannibalizing circuits correctly for
35559 CIRCUIT_PURPOSE_C_ESTABLISH_REND and
35560 CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
35561 build those from scratch. This should make hidden services faster.
35562 - Predict required circuits better, with an eye toward making hidden
35563 services faster on the service end.
35564 - Retry streams if the exit node sends back a 'misc' failure. This
35565 should result in fewer random failures. Also, after failing
35566 from resolve failed or misc, reset the num failures, so we give
35567 it a fair shake next time we try.
35568 - Clean up the rendezvous warn log msgs, and downgrade some to info.
35569 - Reduce severity on logs about dns worker spawning and culling.
35570 - When we're shutting down and we do something like try to post a
35571 server descriptor or rendezvous descriptor, don't complain that
35572 we seem to be unreachable. Of course we are, we're shutting down.
35573 - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
35574 We don't use them yet, but maybe one day our DNS resolver will be
35575 able to discover them.
35576 - Make ContactInfo mandatory for authoritative directory servers.
35577 - Require server descriptors to list IPv4 addresses -- hostnames
35578 are no longer allowed. This also fixes some potential security
35579 problems with people providing hostnames as their address and then
35580 preferentially resolving them to partition users.
35581 - Change log line for unreachability to explicitly suggest /etc/hosts
35582 as the culprit. Also make it clearer what IP address and ports we're
35583 testing for reachability.
35584 - Put quotes around user-supplied strings when logging so users are
35585 more likely to realize if they add bad characters (like quotes)
35587 - Let auth dir servers start without specifying an Address config
35589 - Make unit tests (and other invocations that aren't the real Tor)
35590 run without launching listeners, creating subdirectories, and so on.
35593 Changes in version 0.1.1.5-alpha - 2005-08-08
35594 o Bugfixes included in 0.1.0.14.
35596 o Bugfixes on 0.1.0.x:
35597 - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
35598 torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
35599 it would silently using ignore the 6668.
35602 Changes in version 0.1.0.14 - 2005-08-08
35603 o Bugfixes on 0.1.0.x:
35604 - Fix the other half of the bug with crypto handshakes
35606 - Fix an assert trigger if you send a 'signal term' via the
35607 controller when it's listening for 'event info' messages.
35610 Changes in version 0.1.1.4-alpha - 2005-08-04
35611 o Bugfixes included in 0.1.0.13.
35614 - Improve tor_gettimeofday() granularity on windows.
35615 - Make clients regenerate their keys when their IP address changes.
35616 - Implement some more GETINFO goodness: expose helper nodes, config
35617 options, getinfo keys.
35620 Changes in version 0.1.0.13 - 2005-08-04
35621 o Bugfixes on 0.1.0.x:
35622 - Fix a critical bug in the security of our crypto handshakes.
35623 - Fix a size_t underflow in smartlist_join_strings2() that made
35624 it do bad things when you hand it an empty smartlist.
35625 - Fix Windows installer to ship Tor license (thanks to Aphex for
35626 pointing out this oversight) and put a link to the doc directory
35628 - Explicitly set no-unaligned-access for sparc: it turns out the
35629 new gcc's let you compile broken code, but that doesn't make it
35633 Changes in version 0.1.1.3-alpha - 2005-07-23
35634 o Bugfixes on 0.1.1.2-alpha:
35635 - Fix a bug in handling the controller's "post descriptor"
35637 - Fix several bugs in handling the controller's "extend circuit"
35639 - Fix a bug in handling the controller's "stream status" event.
35640 - Fix an assert failure if we have a controller listening for
35641 circuit events and we go offline.
35642 - Re-allow hidden service descriptors to publish 0 intro points.
35643 - Fix a crash when generating your hidden service descriptor if
35644 you don't have enough intro points already.
35646 o New features on 0.1.1.2-alpha:
35647 - New controller function "getinfo accounting", to ask how
35648 many bytes we've used in this time period.
35649 - Experimental support for helper nodes: a lot of the risk from
35650 a small static adversary comes because users pick new random
35651 nodes every time they rebuild a circuit. Now users will try to
35652 stick to the same small set of entry nodes if they can. Not
35653 enabled by default yet.
35655 o Bugfixes on 0.1.0.12:
35656 - If you're an auth dir server, always publish your dirport,
35657 even if you haven't yet found yourself to be reachable.
35658 - Fix a size_t underflow in smartlist_join_strings2() that made
35659 it do bad things when you hand it an empty smartlist.
35662 Changes in version 0.1.0.12 - 2005-07-18
35663 o New directory servers:
35664 - tor26 has changed IP address.
35666 o Bugfixes on 0.1.0.x:
35667 - Fix a possible double-free in tor_gzip_uncompress().
35668 - When --disable-threads is set, do not search for or link against
35669 pthreads libraries.
35670 - Don't trigger an assert if an authoritative directory server
35671 claims its dirport is 0.
35672 - Fix bug with removing Tor as an NT service: some people were
35673 getting "The service did not return an error." Thanks to Matt
35677 Changes in version 0.1.1.2-alpha - 2005-07-15
35678 o New directory servers:
35679 - tor26 has changed IP address.
35681 o Bugfixes on 0.1.0.x, crashes/leaks:
35682 - Port the servers-not-obeying-their-exit-policies fix from
35684 - Fix an fd leak in start_daemon().
35685 - On Windows, you can't always reopen a port right after you've
35686 closed it. So change retry_listeners() to only close and re-open
35687 ports that have changed.
35688 - Fix a possible double-free in tor_gzip_uncompress().
35690 o Bugfixes on 0.1.0.x, usability:
35691 - When tor_socketpair() fails in Windows, give a reasonable
35692 Windows-style errno back.
35693 - Let people type "tor --install" as well as "tor -install" when
35695 want to make it an NT service.
35696 - NT service patch from Matt Edman to improve error messages.
35697 - When the controller asks for a config option with an abbreviated
35698 name, give the full name in our response.
35699 - Correct the man page entry on TrackHostExitsExpire.
35700 - Looks like we were never delivering deflated (i.e. compressed)
35701 running-routers lists, even when asked. Oops.
35702 - When --disable-threads is set, do not search for or link against
35703 pthreads libraries.
35705 o Bugfixes on 0.1.1.x:
35706 - Fix a seg fault with autodetecting which controller version is
35710 - New hidden service descriptor format: put a version in it, and
35711 let people specify introduction/rendezvous points that aren't
35712 in "the directory" (which is subjective anyway).
35713 - Allow the DEBUG controller event to work again. Mark certain log
35714 entries as "don't tell this to controllers", so we avoid cycles.
35717 Changes in version 0.1.0.11 - 2005-06-30
35718 o Bugfixes on 0.1.0.x:
35719 - Fix major security bug: servers were disregarding their
35720 exit policies if clients behaved unexpectedly.
35721 - Make OS X init script check for missing argument, so we don't
35722 confuse users who invoke it incorrectly.
35723 - Fix a seg fault in "tor --hash-password foo".
35724 - The MAPADDRESS control command was broken.
35727 Changes in version 0.1.1.1-alpha - 2005-06-29
35729 - Make OS X init script check for missing argument, so we don't
35730 confuse users who invoke it incorrectly.
35731 - Fix a seg fault in "tor --hash-password foo".
35732 - Fix a possible way to DoS dirservers.
35733 - When we complain that your exit policy implicitly allows local or
35734 private address spaces, name them explicitly so operators can
35736 - Make the log message less scary when all the dirservers are
35737 temporarily unreachable.
35738 - We were printing the number of idle dns workers incorrectly when
35742 - Revised controller protocol (version 1) that uses ascii rather
35743 than binary. Add supporting libraries in python and java so you
35744 can use the controller from your applications without caring how
35745 our protocol works.
35746 - Spiffy new support for crypto hardware accelerators. Can somebody
35750 Changes in version 0.0.9.10 - 2005-06-16
35751 o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
35752 - Refuse relay cells that claim to have a length larger than the
35753 maximum allowed. This prevents a potential attack that could read
35754 arbitrary memory (e.g. keys) from an exit server's process
35758 Changes in version 0.1.0.10 - 2005-06-14
35759 o Allow a few EINVALs from libevent before dying. Warn on kqueue with
35760 libevent before 1.1a.
35763 Changes in version 0.1.0.9-rc - 2005-06-09
35765 - Reset buf->highwater every time buf_shrink() is called, not just on
35766 a successful shrink. This was causing significant memory bloat.
35767 - Fix buffer overflow when checking hashed passwords.
35768 - Security fix: if seeding the RNG on Win32 fails, quit.
35769 - Allow seeding the RNG on Win32 even when you're not running as
35771 - Disable threading on Solaris too. Something is wonky with it,
35772 cpuworkers, and reentrant libs.
35773 - Reenable the part of the code that tries to flush as soon as an
35774 OR outbuf has a full TLS record available. Perhaps this will make
35775 OR outbufs not grow as huge except in rare cases, thus saving lots
35776 of CPU time plus memory.
35777 - Reject malformed .onion addresses rather then passing them on as
35778 normal web requests.
35779 - Adapt patch from Adam Langley: fix possible memory leak in
35780 tor_lookup_hostname().
35781 - Initialize libevent later in the startup process, so the logs are
35782 already established by the time we start logging libevent warns.
35783 - Use correct errno on win32 if libevent fails.
35784 - Check and warn about known-bad/slow libevent versions.
35785 - Pay more attention to the ClientOnly config option.
35786 - Have torctl.in/tor.sh.in check for location of su binary (needed
35788 - Correct/add man page entries for LongLivedPorts, ExitPolicy,
35789 KeepalivePeriod, ClientOnly, NoPublish, HttpProxy, HttpsProxy,
35790 HttpProxyAuthenticator
35791 - Stop warning about sigpipes in the logs. We're going to
35792 pretend that getting these occasionally is normal and fine.
35793 - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in
35795 installer screens; and don't put stuff into StartupItems unless
35796 the user asks you to.
35797 - Require servers that use the default dirservers to have public IP
35798 addresses. We have too many servers that are configured with private
35799 IPs and their admins never notice the log entries complaining that
35800 their descriptors are being rejected.
35801 - Add OSX uninstall instructions. An actual uninstall script will
35805 Changes in version 0.1.0.8-rc - 2005-05-23
35807 - It turns out that kqueue on OS X 10.3.9 was causing kernel
35808 panics. Disable kqueue on all OS X Tors.
35809 - Fix RPM: remove duplicate line accidentally added to the rpm
35811 - Disable threads on openbsd too, since its gethostaddr is not
35813 - Tolerate libevent 0.8 since it still works, even though it's
35815 - Enable building on Red Hat 9.0 again.
35816 - Allow the middle hop of the testing circuit to be running any
35817 version, now that most of them have the bugfix to let them connect
35818 to unknown servers. This will allow reachability testing to work
35819 even when 0.0.9.7-0.0.9.9 become obsolete.
35820 - Handle relay cells with rh.length too large. This prevents
35821 a potential attack that could read arbitrary memory (maybe even
35822 keys) from the exit server's process.
35823 - We screwed up the dirport reachability testing when we don't yet
35824 have a cached version of the directory. Hopefully now fixed.
35825 - Clean up router_load_single_router() (used by the controller),
35826 so it doesn't seg fault on error.
35827 - Fix a minor memory leak when somebody establishes an introduction
35828 point at your Tor server.
35829 - If a socks connection ends because read fails, don't warn that
35830 you're not sending a socks reply back.
35833 - Add HttpProxyAuthenticator config option too, that works like
35834 the HttpsProxyAuthenticator config option.
35835 - Encode hashed controller passwords in hex instead of base64,
35836 to make it easier to write controllers.
35839 Changes in version 0.1.0.7-rc - 2005-05-17
35841 - Fix a bug in the OS X package installer that prevented it from
35842 installing on Tiger.
35843 - Fix a script bug in the OS X package installer that made it
35844 complain during installation.
35845 - Find libevent even if it's hiding in /usr/local/ and your
35846 CFLAGS and LDFLAGS don't tell you to look there.
35847 - Be able to link with libevent as a shared library (the default
35848 after 1.0d), even if it's hiding in /usr/local/lib and even
35849 if you haven't added /usr/local/lib to your /etc/ld.so.conf,
35850 assuming you're running gcc. Otherwise fail and give a useful
35852 - Fix a bug in the RPM packager: set home directory for _tor to
35853 something more reasonable when first installing.
35854 - Free a minor amount of memory that is still reachable on exit.
35857 Changes in version 0.1.0.6-rc - 2005-05-14
35859 - Implement --disable-threads configure option. Disable threads on
35860 netbsd by default, because it appears to have no reentrant resolver
35862 - Apple's OS X 10.4.0 ships with a broken kqueue. The new libevent
35863 release (1.1) detects and disables kqueue if it's broken.
35864 - Append default exit policy before checking for implicit internal
35865 addresses. Now we don't log a bunch of complaints on startup
35866 when using the default exit policy.
35867 - Some people were putting "Address " in their torrc, and they had
35868 a buggy resolver that resolved " " to 0.0.0.0. Oops.
35869 - If DataDir is ~/.tor, and that expands to /.tor, then default to
35870 LOCALSTATEDIR/tor instead.
35871 - Fix fragmented-message bug in TorControl.py.
35872 - Resolve a minor bug which would prevent unreachable dirports
35873 from getting suppressed in the published descriptor.
35874 - When the controller gave us a new descriptor, we weren't resolving
35875 it immediately, so Tor would think its address was 0.0.0.0 until
35876 we fetched a new directory.
35877 - Fix an uppercase/lowercase case error in suppressing a bogus
35878 libevent warning on some Linuxes.
35881 - Begin scrubbing sensitive strings from logs by default. Turn off
35882 the config option SafeLogging if you need to do debugging.
35883 - Switch to a new buffer management algorithm, which tries to avoid
35884 reallocing and copying quite as much. In first tests it looks like
35885 it uses *more* memory on average, but less cpu.
35886 - First cut at support for "create-fast" cells. Clients can use
35887 these when extending to their first hop, since the TLS already
35888 provides forward secrecy and authentication. Not enabled on
35890 - When dirservers refuse a router descriptor, we now log its
35891 contactinfo, platform, and the poster's IP address.
35892 - Call tor_free_all instead of connections_free_all after forking, to
35893 save memory on systems that need to fork.
35894 - Whine at you if you're a server and you don't set your contactinfo.
35895 - Implement --verify-config command-line option to check if your torrc
35896 is valid without actually launching Tor.
35897 - Rewrite address "serifos.exit" to "localhost.serifos.exit"
35898 rather than just rejecting it.
35901 Changes in version 0.1.0.5-rc - 2005-04-27
35903 - Stop trying to print a null pointer if an OR conn fails because
35904 we didn't like its cert.
35906 - Switch our internal buffers implementation to use a ring buffer,
35907 to hopefully improve performance for fast servers a lot.
35908 - Add HttpsProxyAuthenticator support (basic auth only), based
35909 on patch from Adam Langley.
35910 - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
35911 the fast servers that have been joining lately.
35912 - Give hidden service accesses extra time on the first attempt,
35913 since 60 seconds is often only barely enough. This might improve
35915 - Improve performance for dirservers: stop re-parsing the whole
35916 directory every time you regenerate it.
35917 - Add more debugging info to help us find the weird dns freebsd
35918 pthreads bug; cleaner debug messages to help track future issues.
35921 Changes in version 0.0.9.9 - 2005-04-23
35922 o Bugfixes on 0.0.9.x:
35923 - If unofficial Tor clients connect and send weird TLS certs, our
35924 Tor server triggers an assert. This release contains a minimal
35925 backport from the broader fix that we put into 0.1.0.4-rc.
35928 Changes in version 0.1.0.4-rc - 2005-04-23
35930 - If unofficial Tor clients connect and send weird TLS certs, our
35931 Tor server triggers an assert. Stop asserting, and start handling
35932 TLS errors better in other situations too.
35933 - When the controller asks us to tell it about all the debug-level
35934 logs, it turns out we were generating debug-level logs while
35935 telling it about them, which turns into a bad loop. Now keep
35936 track of whether you're sending a debug log to the controller,
35937 and don't log when you are.
35938 - Fix the "postdescriptor" feature of the controller interface: on
35939 non-complete success, only say "done" once.
35941 - Clients are now willing to load balance over up to 2mB, not 1mB,
35942 of advertised bandwidth capacity.
35943 - Add a NoPublish config option, so you can be a server (e.g. for
35944 testing running Tor servers in other Tor networks) without
35945 publishing your descriptor to the primary dirservers.
35948 Changes in version 0.1.0.3-rc - 2005-04-08
35949 o Improvements on 0.1.0.2-rc:
35950 - Client now retries when streams end early for 'hibernating' or
35951 'resource limit' reasons, rather than failing them.
35952 - More automated handling for dirserver operators:
35953 - Automatically approve nodes running 0.1.0.2-rc or later,
35954 now that the the reachability detection stuff is working.
35955 - Now we allow two unverified servers with the same nickname
35956 but different keys. But if a nickname is verified, only that
35957 nickname+key are allowed.
35958 - If you're an authdirserver connecting to an address:port,
35959 and it's not the OR you were expecting, forget about that
35960 descriptor. If he *was* the one you were expecting, then forget
35961 about all other descriptors for that address:port.
35962 - Allow servers to publish descriptors from 12 hours in the future.
35963 Corollary: only whine about clock skew from the dirserver if
35964 he's a trusted dirserver (since now even verified servers could
35965 have quite wrong clocks).
35966 - Adjust maximum skew and age for rendezvous descriptors: let skew
35967 be 48 hours rather than 90 minutes.
35968 - Efficiency improvements:
35969 - Keep a big splay tree of (circid,orconn)->circuit mappings to make
35970 it much faster to look up a circuit for each relay cell.
35971 - Remove most calls to assert_all_pending_dns_resolves_ok(),
35972 since they're eating our cpu on exit nodes.
35973 - Stop wasting time doing a case insensitive comparison for every
35974 dns name every time we do any lookup. Canonicalize the names to
35975 lowercase and be done with it.
35976 - Start sending 'truncated' cells back rather than destroy cells,
35977 if the circuit closes in front of you. This means we won't have
35978 to abandon partially built circuits.
35979 - Only warn once per nickname from add_nickname_list_to_smartlist
35980 per failure, so an entrynode or exitnode choice that's down won't
35982 - Put a note in the torrc about abuse potential with the default
35984 - Revise control spec and implementation to allow all log messages to
35985 be sent to controller with their severities intact (suggested by
35986 Matt Edman). Update TorControl to handle new log event types.
35987 - Provide better explanation messages when controller's POSTDESCRIPTOR
35989 - Stop putting nodename in the Platform string in server descriptors.
35990 It doesn't actually help, and it is confusing/upsetting some people.
35992 o Bugfixes on 0.1.0.2-rc:
35993 - We were printing the host mask wrong in exit policies in server
35994 descriptors. This isn't a critical bug though, since we were still
35995 obeying the exit policy internally.
35996 - Fix Tor when compiled with libevent but without pthreads: move
35997 connection_unregister() from _connection_free() to
35999 - Fix an assert trigger (already fixed in 0.0.9.x): when we have
36000 the rare mysterious case of accepting a conn on 0.0.0.0:0, then
36001 when we look through the connection array, we'll find any of the
36002 cpu/dnsworkers. This is no good.
36004 o Bugfixes on 0.0.9.8:
36005 - Fix possible bug on threading platforms (e.g. win32) which was
36006 leaking a file descriptor whenever a cpuworker or dnsworker died.
36007 - When using preferred entry or exit nodes, ignore whether the
36008 circuit wants uptime or capacity. They asked for the nodes, they
36010 - chdir() to your datadirectory at the *end* of the daemonize process,
36011 not the beginning. This was a problem because the first time you
36012 run tor, if your datadir isn't there, and you have runasdaemon set
36013 to 1, it will try to chdir to it before it tries to create it. Oops.
36014 - Handle changed router status correctly when dirserver reloads
36015 fingerprint file. We used to be dropping all unverified descriptors
36016 right then. The bug was hidden because we would immediately
36017 fetch a directory from another dirserver, which would include the
36018 descriptors we just dropped.
36019 - When we're connecting to an OR and he's got a different nickname/key
36020 than we were expecting, only complain loudly if we're an OP or a
36021 dirserver. Complaining loudly to the OR admins just confuses them.
36022 - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
36023 artificially capped at 500kB.
36026 Changes in version 0.0.9.8 - 2005-04-07
36027 o Bugfixes on 0.0.9.x:
36028 - We have a bug that I haven't found yet. Sometimes, very rarely,
36029 cpuworkers get stuck in the 'busy' state, even though the cpuworker
36030 thinks of itself as idle. This meant that no new circuits ever got
36031 established. Here's a workaround to kill any cpuworker that's been
36032 busy for more than 100 seconds.
36035 Changes in version 0.1.0.2-rc - 2005-04-01
36036 o Bugfixes on 0.1.0.1-rc:
36037 - Fixes on reachability detection:
36038 - Don't check for reachability while hibernating.
36039 - If ORPort is reachable but DirPort isn't, still publish the
36040 descriptor, but zero out DirPort until it's found reachable.
36041 - When building testing circs for ORPort testing, use only
36042 high-bandwidth nodes, so fewer circuits fail.
36043 - Complain about unreachable ORPort separately from unreachable
36044 DirPort, so the user knows what's going on.
36045 - Make sure we only conclude ORPort reachability if we didn't
36046 initiate the conn. Otherwise we could falsely conclude that
36047 we're reachable just because we connected to the guy earlier
36048 and he used that same pipe to extend to us.
36049 - Authdirservers shouldn't do ORPort reachability detection,
36050 since they're in clique mode, so it will be rare to find a
36051 server not already connected to them.
36052 - When building testing circuits, always pick middle hops running
36053 Tor 0.0.9.7, so we avoid the "can't extend to unknown routers"
36054 bug. (This is a kludge; it will go away when 0.0.9.x becomes
36056 - When we decide we're reachable, actually publish our descriptor
36058 - Fix bug in redirectstream in the controller.
36059 - Fix the state descriptor strings so logs don't claim edge streams
36060 are in a different state than they actually are.
36061 - Use recent libevent features when possible (this only really affects
36062 win32 and osx right now, because the new libevent with these
36063 features hasn't been released yet). Add code to suppress spurious
36065 - Prevent possible segfault in connection_close_unattached_ap().
36066 - Fix newlines on torrc in win32.
36067 - Improve error msgs when tor-resolve fails.
36069 o Improvements on 0.0.9.x:
36070 - New experimental script tor/contrib/ExerciseServer.py (needs more
36071 work) that uses the controller interface to build circuits and
36072 fetch pages over them. This will help us bootstrap servers that
36073 have lots of capacity but haven't noticed it yet.
36074 - New experimental script tor/contrib/PathDemo.py (needs more work)
36075 that uses the controller interface to let you choose whole paths
36077 "<hostname>.<path,separated by dots>.<length of path>.path"
36078 - When we've connected to an OR and handshaked but didn't like
36079 the result, we were closing the conn without sending destroy
36080 cells back for pending circuits. Now send those destroys.
36083 Changes in version 0.0.9.7 - 2005-04-01
36084 o Bugfixes on 0.0.9.x:
36085 - Fix another race crash bug (thanks to Glenn Fink for reporting).
36086 - Compare identity to identity, not to nickname, when extending to
36087 a router not already in the directory. This was preventing us from
36088 extending to unknown routers. Oops.
36089 - Make sure to create OS X Tor user in <500 range, so we aren't
36090 creating actual system users.
36091 - Note where connection-that-hasn't-sent-end was marked, and fix
36092 a few really loud instances of this harmless bug (it's fixed more
36096 Changes in version 0.1.0.1-rc - 2005-03-28
36098 - Add reachability testing. Your Tor server will automatically try
36099 to see if its ORPort and DirPort are reachable from the outside,
36100 and it won't upload its descriptor until it decides they are.
36101 - Handle unavailable hidden services better. Handle slow or busy
36102 hidden services better.
36103 - Add support for CONNECTing through https proxies, with "HttpsProxy"
36105 - New exit policy: accept most low-numbered ports, rather than
36106 rejecting most low-numbered ports.
36107 - More Tor controller support (still experimental). See
36108 http://tor.eff.org/doc/control-spec.txt for all the new features,
36109 including signals to emulate unix signals from any platform;
36110 redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
36111 closestream; closecircuit; etc.
36112 - Make nt services work and start on startup on win32 (based on
36113 patch by Matt Edman).
36114 - Add a new AddressMap config directive to rewrite incoming socks
36115 addresses. This lets you, for example, declare an implicit
36116 required exit node for certain sites.
36117 - Add a new TrackHostExits config directive to trigger addressmaps
36118 for certain incoming socks addresses -- for sites that break when
36119 your exit keeps changing (based on patch by Mike Perry).
36120 - Redo the client-side dns cache so it's just an addressmap too.
36121 - Notice when our IP changes, and reset stats/uptime/reachability.
36122 - When an application is using socks5, give him the whole variety of
36123 potential socks5 responses (connect refused, host unreachable, etc),
36124 rather than just "success" or "failure".
36125 - A more sane version numbering system. See
36126 http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
36127 - New contributed script "exitlist": a simple python script to
36128 parse directories and find Tor nodes that exit to listed
36130 - New contributed script "privoxy-tor-toggle" to toggle whether
36131 Privoxy uses Tor. Seems to be configured for Debian by default.
36132 - Report HTTP reasons to client when getting a response from directory
36133 servers -- so you can actually know what went wrong.
36134 - New config option MaxAdvertisedBandwidth which lets you advertise
36135 a low bandwidthrate (to not attract as many circuits) while still
36136 allowing a higher bandwidthrate in reality.
36138 o Robustness/stability fixes:
36139 - Make Tor use Niels Provos's libevent instead of its current
36140 poll-but-sometimes-select mess. This will let us use faster async
36141 cores (like epoll, kpoll, and /dev/poll), and hopefully work better
36143 - pthread support now too. This was forced because when we forked,
36144 we ended up wasting a lot of duplicate ram over time. Also switch
36145 to foo_r versions of some library calls to allow reentry and
36147 - Better handling for heterogeneous / unreliable nodes:
36148 - Annotate circuits w/ whether they aim to contain high uptime nodes
36149 and/or high capacity nodes. When building circuits, choose
36151 - This means that every single node in an intro rend circuit,
36152 not just the last one, will have a minimum uptime.
36153 - New config option LongLivedPorts to indicate application streams
36154 that will want high uptime circuits.
36155 - Servers reset uptime when a dir fetch entirely fails. This
36156 hopefully reflects stability of the server's network connectivity.
36157 - If somebody starts his tor server in Jan 2004 and then fixes his
36158 clock, don't make his published uptime be a year.
36159 - Reset published uptime when you wake up from hibernation.
36160 - Introduce a notion of 'internal' circs, which are chosen without
36161 regard to the exit policy of the last hop. Intro and rendezvous
36162 circs must be internal circs, to avoid leaking information. Resolve
36163 and connect streams can use internal circs if they want.
36164 - New circuit pooling algorithm: make sure to have enough circs around
36165 to satisfy any predicted ports, and also make sure to have 2 internal
36166 circs around if we've required internal circs lately (and with high
36167 uptime if we've seen that lately too).
36168 - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
36169 which describes how often we retry making new circuits if current
36170 ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
36171 how long we're willing to make use of an already-dirty circuit.
36172 - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
36173 circ as necessary, if there are any completed ones lying around
36174 when we try to launch one.
36175 - Make hidden services try to establish a rendezvous for 30 seconds,
36176 rather than for n (where n=3) attempts to build a circuit.
36177 - Change SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to a config option
36178 "ShutdownWaitLength".
36179 - Try to be more zealous about calling connection_edge_end when
36180 things go bad with edge conns in connection.c.
36181 - Revise tor-spec to add more/better stream end reasons.
36182 - Revise all calls to connection_edge_end to avoid sending "misc",
36183 and to take errno into account where possible.
36186 - Fix a race condition that can trigger an assert, when we have a
36187 pending create cell and an OR connection fails right then.
36188 - Fix several double-mark-for-close bugs, e.g. where we were finding
36189 a conn for a cell even if that conn is already marked for close.
36190 - Make sequence of log messages when starting on win32 with no config
36191 file more reasonable.
36192 - When choosing an exit node for a new non-internal circ, don't take
36193 into account whether it'll be useful for any pending x.onion
36194 addresses -- it won't.
36195 - Turn addr_policy_compare from a tristate to a quadstate; this should
36196 help address our "Ah, you allow 1.2.3.4:80. You are a good choice
36197 for google.com" problem.
36198 - Make "platform" string in descriptor more accurate for Win32 servers,
36199 so it's not just "unknown platform".
36200 - Fix an edge case in parsing config options (thanks weasel).
36201 If they say "--" on the commandline, it's not an option.
36202 - Reject odd-looking addresses at the client (e.g. addresses that
36203 contain a colon), rather than having the server drop them because
36205 - tor-resolve requests were ignoring .exit if there was a working circuit
36206 they could use instead.
36207 - REUSEADDR on normal platforms means you can rebind to the port
36208 right after somebody else has let it go. But REUSEADDR on win32
36209 means to let you bind to the port _even when somebody else
36210 already has it bound_! So, don't do that on Win32.
36211 - Change version parsing logic: a version is "obsolete" if it is not
36212 recommended and (1) there is a newer recommended version in the
36213 same series, or (2) there are no recommended versions in the same
36214 series, but there are some recommended versions in a newer series.
36215 A version is "new" if it is newer than any recommended version in
36217 - Stop most cases of hanging up on a socks connection without sending
36221 - Require BandwidthRate to be at least 20kB/s for servers.
36222 - When a dirserver causes you to give a warn, mention which dirserver
36224 - New config option DirAllowPrivateAddresses for authdirservers.
36225 Now by default they refuse router descriptors that have non-IP or
36226 private-IP addresses.
36227 - Stop publishing socksport in the directory, since it's not
36228 actually meant to be public. For compatibility, publish a 0 there
36230 - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
36231 smart" value, that is low for servers and high for clients.
36232 - If our clock jumps forward by 100 seconds or more, assume something
36233 has gone wrong with our network and abandon all not-yet-used circs.
36234 - Warn when exit policy implicitly allows local addresses.
36235 - If we get an incredibly skewed timestamp from a dirserver mirror
36236 that isn't a verified OR, don't warn -- it's probably him that's
36238 - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
36239 cookies to disk and doesn't log each web request to disk. (Thanks
36240 to Brett Carrington for pointing this out.)
36241 - When a client asks us for a dir mirror and we don't have one,
36242 launch an attempt to get a fresh one.
36243 - If we're hibernating and we get a SIGINT, exit immediately.
36244 - Add --with-dmalloc ./configure option, to track memory leaks.
36245 - And try to free all memory on closing, so we can detect what
36247 - Cache local dns resolves correctly even when they're .exit
36249 - Give a better warning when some other server advertises an
36250 ORPort that is actually an apache running ssl.
36251 - Add "opt hibernating 1" to server descriptor to make it clearer
36252 whether the server is hibernating.
36255 Changes in version 0.0.9.6 - 2005-03-24
36256 o Bugfixes on 0.0.9.x (crashes and asserts):
36257 - Add new end stream reasons to maintenance branch. Fix bug where
36258 reason (8) could trigger an assert. Prevent bug from recurring.
36259 - Apparently win32 stat wants paths to not end with a slash.
36260 - Fix assert triggers in assert_cpath_layer_ok(), where we were
36261 blowing away the circuit that conn->cpath_layer points to, then
36262 checking to see if the circ is well-formed. Backport check to make
36263 sure we dont use the cpath on a closed connection.
36264 - Prevent circuit_resume_edge_reading_helper() from trying to package
36265 inbufs for marked-for-close streams.
36266 - Don't crash on hup if your options->address has become unresolvable.
36267 - Some systems (like OS X) sometimes accept() a connection and tell
36268 you the remote host is 0.0.0.0:0. If this happens, due to some
36269 other mis-features, we get confused; so refuse the conn for now.
36271 o Bugfixes on 0.0.9.x (other):
36272 - Fix harmless but scary "Unrecognized content encoding" warn message.
36273 - Add new stream error reason: TORPROTOCOL reason means "you are not
36274 speaking a version of Tor I understand; say bye-bye to your stream."
36275 - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
36276 into the future, now that we are more tolerant of skew. This
36277 resolves a bug where a Tor server would refuse to cache a directory
36278 because all the directories it gets are too far in the future;
36279 yet the Tor server never logs any complaints about clock skew.
36280 - Mac packaging magic: make man pages useable, and do not overwrite
36281 existing torrc files.
36282 - Make OS X log happily to /var/log/tor/tor.log
36285 Changes in version 0.0.9.5 - 2005-02-22
36286 o Bugfixes on 0.0.9.x:
36287 - Fix an assert race at exit nodes when resolve requests fail.
36288 - Stop picking unverified dir mirrors--it only leads to misery.
36289 - Patch from Matt Edman to make NT services work better. Service
36290 support is still not compiled into the executable by default.
36291 - Patch from Dmitri Bely so the Tor service runs better under
36292 the win32 SYSTEM account.
36293 - Make tor-resolve actually work (?) on Win32.
36294 - Fix a sign bug when getrlimit claims to have 4+ billion
36295 file descriptors available.
36296 - Stop refusing to start when bandwidthburst == bandwidthrate.
36297 - When create cells have been on the onion queue more than five
36298 seconds, just send back a destroy and take them off the list.
36301 Changes in version 0.0.9.4 - 2005-02-03
36302 o Bugfixes on 0.0.9:
36303 - Fix an assert bug that took down most of our servers: when
36304 a server claims to have 1 GB of bandwidthburst, don't
36306 - Don't crash as badly if we have spawned the max allowed number
36307 of dnsworkers, or we're out of file descriptors.
36308 - Block more file-sharing ports in the default exit policy.
36309 - MaxConn is now automatically set to the hard limit of max
36310 file descriptors we're allowed (ulimit -n), minus a few for
36312 - Give a clearer message when servers need to raise their
36313 ulimit -n when they start running out of file descriptors.
36314 - SGI Compatibility patches from Jan Schaumann.
36315 - Tolerate a corrupt cached directory better.
36316 - When a dirserver hasn't approved your server, list which one.
36317 - Go into soft hibernation after 95% of the bandwidth is used,
36318 not 99%. This is especially important for daily hibernators who
36319 have a small accounting max. Hopefully it will result in fewer
36320 cut connections when the hard hibernation starts.
36321 - Load-balance better when using servers that claim more than
36322 800kB/s of capacity.
36323 - Make NT services work (experimental, only used if compiled in).
36326 Changes in version 0.0.9.3 - 2005-01-21
36327 o Bugfixes on 0.0.9:
36328 - Backport the cpu use fixes from main branch, so busy servers won't
36329 need as much processor time.
36330 - Work better when we go offline and then come back, or when we
36331 run Tor at boot before the network is up. We do this by
36332 optimistically trying to fetch a new directory whenever an
36333 application request comes in and we think we're offline -- the
36334 human is hopefully a good measure of when the network is back.
36335 - Backport some minimal hidserv bugfixes: keep rend circuits open as
36336 long as you keep using them; actually publish hidserv descriptors
36337 shortly after they change, rather than waiting 20-40 minutes.
36338 - Enable Mac startup script by default.
36339 - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
36340 - When you update AllowUnverifiedNodes or FirewallPorts via the
36341 controller's setconf feature, we were always appending, never
36343 - When you update HiddenServiceDir via setconf, it was screwing up
36344 the order of reading the lines, making it fail.
36345 - Do not rewrite a cached directory back to the cache; otherwise we
36346 will think it is recent and not fetch a newer one on startup.
36347 - Workaround for webservers that lie about Content-Encoding: Tor
36348 now tries to autodetect compressed directories and compression
36349 itself. This lets us Proxypass dir fetches through apache.
36352 Changes in version 0.0.9.2 - 2005-01-04
36353 o Bugfixes on 0.0.9 (crashes and asserts):
36354 - Fix an assert on startup when the disk is full and you're logging
36356 - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
36357 style address, then we'd crash.
36358 - Fix an assert trigger when the running-routers string we get from
36359 a dirserver is broken.
36360 - Make worker threads start and run on win32. Now win32 servers
36362 - Bandaid (not actually fix, but now it doesn't crash) an assert
36363 where the dns worker dies mysteriously and the main Tor process
36364 doesn't remember anything about the address it was resolving.
36366 o Bugfixes on 0.0.9 (Win32):
36367 - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
36368 name out of the warning/assert messages.
36369 - Fix a superficial "unhandled error on read" bug on win32.
36370 - The win32 installer no longer requires a click-through for our
36371 license, since our Free Software license grants rights but does not
36373 - Win32: When connecting to a dirserver fails, try another one
36374 immediately. (This was already working for non-win32 Tors.)
36375 - Stop trying to parse $HOME on win32 when hunting for default
36377 - Make tor-resolve.c work on win32 by calling network_init().
36379 o Bugfixes on 0.0.9 (other):
36380 - Make 0.0.9.x build on Solaris again.
36381 - Due to a fencepost error, we were blowing away the \n when reporting
36382 confvalue items in the controller. So asking for multiple config
36383 values at once couldn't work.
36384 - When listing circuits that are pending on an opening OR connection,
36385 if we're an OR we were listing circuits that *end* at us as
36386 being pending on every listener, dns/cpu worker, etc. Stop that.
36387 - Dirservers were failing to create 'running-routers' or 'directory'
36388 strings if we had more than some threshold of routers. Fix them so
36389 they can handle any number of routers.
36390 - Fix a superficial "Duplicate mark for close" bug.
36391 - Stop checking for clock skew for OR connections, even for servers.
36392 - Fix a fencepost error that was chopping off the last letter of any
36393 nickname that is the maximum allowed nickname length.
36394 - Update URLs in log messages so they point to the new website.
36395 - Fix a potential problem in mangling server private keys while
36396 writing to disk (not triggered yet, as far as we know).
36397 - Include the licenses for other free software we include in Tor,
36398 now that we're shipping binary distributions more regularly.
36401 Changes in version 0.0.9.1 - 2004-12-15
36402 o Bugfixes on 0.0.9:
36403 - Make hibernation actually work.
36404 - Make HashedControlPassword config option work.
36405 - When we're reporting event circuit status to a controller,
36406 don't use the stream status code.
36409 Changes in version 0.0.9 - 2004-12-12
36411 - Clean up manpage and torrc.sample file.
36412 - Clean up severities and text of log warnings.
36414 - Make servers trigger an assert when they enter hibernation.
36417 Changes in version 0.0.9rc7 - 2004-12-08
36418 o Bugfixes on 0.0.9rc:
36419 - Fix a stack-trashing crash when an exit node begins hibernating.
36420 - Avoid looking at unallocated memory while considering which
36421 ports we need to build circuits to cover.
36422 - Stop a sigpipe: when an 'end' cell races with eof from the app,
36423 we shouldn't hold-open-until-flush if the eof arrived first.
36424 - Fix a bug with init_cookie_authentication() in the controller.
36425 - When recommending new-format log lines, if the upper bound is
36426 LOG_ERR, leave it implicit.
36428 o Bugfixes on 0.0.8.1:
36429 - Fix a whole slew of memory leaks.
36430 - Fix isspace() and friends so they still make Solaris happy
36431 but also so they don't trigger asserts on win32.
36432 - Fix parse_iso_time on platforms without strptime (eg win32).
36433 - win32: tolerate extra "readable" events better.
36434 - win32: when being multithreaded, leave parent fdarray open.
36435 - Make unit tests work on win32.
36438 Changes in version 0.0.9rc6 - 2004-12-06
36439 o Bugfixes on 0.0.9pre:
36440 - Clean up some more integer underflow opportunities (not exploitable
36442 - While hibernating, hup should not regrow our listeners.
36443 - Send an end to the streams we close when we hibernate, rather
36444 than just chopping them off.
36445 - React to eof immediately on non-open edge connections.
36447 o Bugfixes on 0.0.8.1:
36448 - Calculate timeout for waiting for a connected cell from the time
36449 we sent the begin cell, not from the time the stream started. If
36450 it took a long time to establish the circuit, we would time out
36451 right after sending the begin cell.
36452 - Fix router_compare_addr_to_addr_policy: it was not treating a port
36453 of * as always matching, so we were picking reject *:* nodes as
36454 exit nodes too. Oops.
36457 - New circuit building strategy: keep a list of ports that we've
36458 used in the past 6 hours, and always try to have 2 circuits open
36459 or on the way that will handle each such port. Seed us with port
36460 80 so web users won't complain that Tor is "slow to start up".
36461 - Make kill -USR1 dump more useful stats about circuits.
36462 - When warning about retrying or giving up, print the address, so
36463 the user knows which one it's talking about.
36464 - If you haven't used a clean circuit in an hour, throw it away,
36465 just to be on the safe side. (This means after 6 hours a totally
36466 unused Tor client will have no circuits open.)
36469 Changes in version 0.0.9rc5 - 2004-12-01
36470 o Bugfixes on 0.0.8.1:
36471 - Disallow NDEBUG. We don't ever want anybody to turn off debug.
36472 - Let resolve conns retry/expire also, rather than sticking around
36474 - If we are using select, make sure we stay within FD_SETSIZE.
36476 o Bugfixes on 0.0.9pre:
36477 - Fix integer underflow in tor_vsnprintf() that may be exploitable,
36478 but doesn't seem to be currently; thanks to Ilja van Sprundel for
36480 - If anybody set DirFetchPostPeriod, give them StatusFetchPeriod
36481 instead. Impose minima and maxima for all *Period options; impose
36482 even tighter maxima for fetching if we are a caching dirserver.
36483 Clip rather than rejecting.
36484 - Fetch cached running-routers from servers that serve it (that is,
36485 authdirservers and servers running 0.0.9rc5-cvs or later.)
36488 - Accept *:706 (silc) in default exit policy.
36489 - Implement new versioning format for post 0.1.
36490 - Support "foo.nickname.exit" addresses, to let Alice request the
36491 address "foo" as viewed by exit node "nickname". Based on a patch
36493 - Make tor --version --version dump the cvs Id of every file.
36496 Changes in version 0.0.9rc4 - 2004-11-28
36497 o Bugfixes on 0.0.8.1:
36498 - Make windows sockets actually non-blocking (oops), and handle
36499 win32 socket errors better.
36501 o Bugfixes on 0.0.9rc1:
36502 - Actually catch the -USR2 signal.
36505 Changes in version 0.0.9rc3 - 2004-11-25
36506 o Bugfixes on 0.0.8.1:
36507 - Flush the log file descriptor after we print "Tor opening log file",
36508 so we don't see those messages days later.
36510 o Bugfixes on 0.0.9rc1:
36511 - Make tor-resolve work again.
36512 - Avoid infinite loop in tor-resolve if tor hangs up on it.
36513 - Fix an assert trigger for clients/servers handling resolves.
36516 Changes in version 0.0.9rc2 - 2004-11-24
36517 o Bugfixes on 0.0.9rc1:
36518 - I broke socks5 support while fixing the eof bug.
36519 - Allow unitless bandwidths and intervals; they default to bytes
36521 - New servers don't start out hibernating; they are active until
36522 they run out of bytes, so they have a better estimate of how
36523 long it takes, and so their operators can know they're working.
36526 Changes in version 0.0.9rc1 - 2004-11-23
36527 o Bugfixes on 0.0.8.1:
36528 - Finally fix a bug that's been plaguing us for a year:
36529 With high load, circuit package window was reaching 0. Whenever
36530 we got a circuit-level sendme, we were reading a lot on each
36531 socket, but only writing out a bit. So we would eventually reach
36532 eof. This would be noticed and acted on even when there were still
36533 bytes sitting in the inbuf.
36534 - When poll() is interrupted, we shouldn't believe the revents values.
36536 o Bugfixes on 0.0.9pre6:
36537 - Fix hibernate bug that caused pre6 to be broken.
36538 - Don't keep rephist info for routers that haven't had activity for
36539 24 hours. (This matters now that clients have keys, since we track
36541 - Never call close_temp_logs while validating log options.
36542 - Fix backslash-escaping on tor.sh.in and torctl.in.
36545 - Implement weekly/monthly/daily accounting: now you specify your
36546 hibernation properties by
36547 AccountingMax N bytes|KB|MB|GB|TB
36548 AccountingStart day|week|month [day] HH:MM
36549 Defaults to "month 1 0:00".
36550 - Let bandwidth and interval config options be specified as 5 bytes,
36551 kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
36552 - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
36553 get back to normal.)
36554 - If your requested entry or exit node has advertised bandwidth 0,
36556 - Be more greedy about filling up relay cells -- we try reading again
36557 once we've processed the stuff we read, in case enough has arrived
36558 to fill the last cell completely.
36559 - Apply NT service patch from Osamu Fujino. Still needs more work.
36562 Changes in version 0.0.9pre6 - 2004-11-15
36563 o Bugfixes on 0.0.8.1:
36564 - Fix assert failure on malformed socks4a requests.
36565 - Use identity comparison, not nickname comparison, to choose which
36566 half of circuit-ID-space each side gets to use. This is needed
36567 because sometimes we think of a router as a nickname, and sometimes
36568 as a hex ID, and we can't predict what the other side will do.
36569 - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
36570 write() call will fail and we handle it there.
36571 - Add a FAST_SMARTLIST define to optionally inline smartlist_get
36572 and smartlist_len, which are two major profiling offenders.
36574 o Bugfixes on 0.0.9pre5:
36575 - Fix a bug in read_all that was corrupting config files on windows.
36576 - When we're raising the max number of open file descriptors to
36577 'unlimited', don't log that we just raised it to '-1'.
36578 - Include event code with events, as required by control-spec.txt.
36579 - Don't give a fingerprint when clients do --list-fingerprint:
36580 it's misleading, because it will never be the same again.
36581 - Stop using strlcpy in tor_strndup, since it was slowing us
36583 - Remove warn on startup about missing cached-directory file.
36584 - Make kill -USR1 work again.
36585 - Hibernate if we start tor during the "wait for wakeup-time" phase
36586 of an accounting interval. Log our hibernation plans better.
36587 - Authoritative dirservers now also cache their directory, so they
36588 have it on start-up.
36591 - Fetch running-routers; cache running-routers; compress
36592 running-routers; serve compressed running-routers.z
36593 - Add NSI installer script contributed by J Doe.
36594 - Commit VC6 and VC7 workspace/project files.
36595 - Commit a tor.spec for making RPM files, with help from jbash.
36596 - Add contrib/torctl.in contributed by Glenn Fink.
36597 - Implement the control-spec's SAVECONF command, to write your
36598 configuration to torrc.
36599 - Get cookie authentication for the controller closer to working.
36600 - Include control-spec.txt in the tarball.
36601 - When set_conf changes our server descriptor, upload a new copy.
36602 But don't upload it too often if there are frequent changes.
36603 - Document authentication config in man page, and document signals
36605 - Clean up confusing parts of man page and torrc.sample.
36606 - Make expand_filename handle ~ and ~username.
36607 - Use autoconf to enable largefile support where necessary. Use
36608 ftello where available, since ftell can fail at 2GB.
36609 - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
36610 log more informatively.
36611 - Give a slightly more useful output for "tor -h".
36612 - Refuse application socks connections to port 0.
36613 - Check clock skew for verified servers, but allow unverified
36614 servers and clients to have any clock skew.
36615 - Break DirFetchPostPeriod into:
36616 - DirFetchPeriod for fetching full directory,
36617 - StatusFetchPeriod for fetching running-routers,
36618 - DirPostPeriod for posting server descriptor,
36619 - RendPostPeriod for posting hidden service descriptors.
36620 - Make sure the hidden service descriptors are at a random offset
36621 from each other, to hinder linkability.
36624 Changes in version 0.0.9pre5 - 2004-11-09
36625 o Bugfixes on 0.0.9pre4:
36626 - Fix a seg fault in unit tests (doesn't affect main program).
36627 - Fix an assert bug where a hidden service provider would fail if
36628 the first hop of his rendezvous circuit was down.
36629 - Hidden service operators now correctly handle version 1 style
36630 INTRODUCE1 cells (nobody generates them still, so not a critical
36632 - If do_hup fails, actually notice.
36633 - Handle more errnos from accept() without closing the listener.
36634 Some OpenBSD machines were closing their listeners because
36635 they ran out of file descriptors.
36636 - Send resolve cells to exit routers that are running a new
36637 enough version of the resolve code to work right.
36638 - Better handling of winsock includes on non-MSV win32 compilers.
36639 - Some people had wrapped their tor client/server in a script
36640 that would restart it whenever it died. This did not play well
36641 with our "shut down if your version is obsolete" code. Now people
36642 don't fetch a new directory if their local cached version is
36644 - Make our autogen.sh work on ksh as well as bash.
36647 - Hibernation: New config option "AccountingMaxKB" lets you
36648 set how many KBytes per month you want to allow your server to
36649 consume. Rather than spreading those bytes out evenly over the
36650 month, we instead hibernate for some of the month and pop up
36651 at a deterministic time, work until the bytes are consumed, then
36652 hibernate again. Config option "MonthlyAccountingStart" lets you
36653 specify which day of the month your billing cycle starts on.
36654 - Control interface: a separate program can now talk to your
36655 client/server over a socket, and get/set config options, receive
36656 notifications of circuits and streams starting/finishing/dying,
36657 bandwidth used, etc. The next step is to get some GUIs working.
36658 Let us know if you want to help out. See doc/control-spec.txt .
36659 - Ship a contrib/tor-control.py as an example script to interact
36660 with the control port.
36661 - "tor --hash-password zzyxz" will output a salted password for
36662 use in authenticating to the control interface.
36663 - New log format in config:
36664 "Log minsev[-maxsev] stdout|stderr|syslog" or
36665 "Log minsev[-maxsev] file /var/foo"
36668 - DirPolicy config option, to let people reject incoming addresses
36669 from their dirserver.
36670 - "tor --list-fingerprint" will list your identity key fingerprint
36672 - Add "pass" target for RedirectExit, to make it easier to break
36673 out of a sequence of RedirectExit rules.
36674 - Clients now generate a TLS cert too, in preparation for having
36675 them act more like real nodes.
36676 - Ship src/win32/ in the tarball, so people can use it to build.
36677 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
36679 - New "router-status" line in directory, to better bind each verified
36680 nickname to its identity key.
36681 - Deprecate unofficial config option abbreviations, and abbreviations
36682 not on the command line.
36683 - Add a pure-C tor-resolve implementation.
36684 - Use getrlimit and friends to ensure we can reach MaxConn (currently
36685 1024) file descriptors.
36687 o Code security improvements, inspired by Ilja:
36688 - Replace sprintf with snprintf. (I think they were all safe, but
36690 - Replace strcpy/strncpy with strlcpy in more places.
36691 - Avoid strcat; use snprintf or strlcat instead.
36692 - snprintf wrapper with consistent (though not C99) overflow behavior.
36695 Changes in version 0.0.9pre4 - 2004-10-17
36696 o Bugfixes on 0.0.9pre3:
36697 - If the server doesn't specify an exit policy, use the real default
36698 exit policy, not reject *:*.
36699 - Ignore fascistfirewall when uploading/downloading hidden service
36700 descriptors, since we go through Tor for those; and when using
36701 an HttpProxy, since we assume it can reach them all.
36702 - When looking for an authoritative dirserver, use only the ones
36703 configured at boot. Don't bother looking in the directory.
36704 - The rest of the fix for get_default_conf_file() on older win32.
36705 - Make 'Routerfile' config option obsolete.
36708 - New 'MyFamily nick1,...' config option for a server to
36709 specify other servers that shouldn't be used in the same circuit
36710 with it. Only believed if nick1 also specifies us.
36711 - New 'NodeFamily nick1,nick2,...' config option for a client to
36712 specify nodes that it doesn't want to use in the same circuit.
36713 - New 'Redirectexit pattern address:port' config option for a
36714 server to redirect exit connections, e.g. to a local squid.
36717 Changes in version 0.0.9pre3 - 2004-10-13
36718 o Bugfixes on 0.0.8.1:
36719 - Better torrc example lines for dirbindaddress and orbindaddress.
36720 - Improved bounds checking on parsed ints (e.g. config options and
36721 the ones we find in directories.)
36722 - Better handling of size_t vs int, so we're more robust on 64
36724 - Fix the rest of the bug where a newly started OR would appear
36725 as unverified even after we've added his fingerprint and hupped
36727 - Fix a bug from 0.0.7: when read() failed on a stream, we would
36728 close it without sending back an end. So 'connection refused'
36729 would simply be ignored and the user would get no response.
36731 o Bugfixes on 0.0.9pre2:
36732 - Serving the cached-on-disk directory to people is bad. We now
36733 provide no directory until we've fetched a fresh one.
36734 - Workaround for bug on windows where cached-directories get crlf
36736 - Make get_default_conf_file() work on older windows too.
36737 - If we write a *:* exit policy line in the descriptor, don't write
36738 any more exit policy lines.
36741 - Use only 0.0.9pre1 and later servers for resolve cells.
36742 - Make the dirservers file obsolete.
36743 - Include a dir-signing-key token in directories to tell the
36744 parsing entity which key is being used to sign.
36745 - Remove the built-in bulky default dirservers string.
36746 - New config option "Dirserver %s:%d [fingerprint]", which can be
36747 repeated as many times as needed. If no dirservers specified,
36748 default to moria1,moria2,tor26.
36749 - Make moria2 advertise a dirport of 80, so people behind firewalls
36750 will be able to get a directory.
36751 - Http proxy support
36752 - Dirservers translate requests for http://%s:%d/x to /x
36753 - You can specify "HttpProxy %s[:%d]" and all dir fetches will
36754 be routed through this host.
36755 - Clients ask for /tor/x rather than /x for new enough dirservers.
36756 This way we can one day coexist peacefully with apache.
36757 - Clients specify a "Host: %s%d" http header, to be compatible
36758 with more proxies, and so running squid on an exit node can work.
36761 Changes in version 0.0.8.1 - 2004-10-13
36763 - Fix a seg fault that can be triggered remotely for Tor
36764 clients/servers with an open dirport.
36765 - Fix a rare assert trigger, where routerinfos for entries in
36766 our cpath would expire while we're building the path.
36767 - Fix a bug in OutboundBindAddress so it (hopefully) works.
36768 - Fix a rare seg fault for people running hidden services on
36769 intermittent connections.
36770 - Fix a bug in parsing opt keywords with objects.
36771 - Fix a stale pointer assert bug when a stream detaches and
36773 - Fix a string format vulnerability (probably not exploitable)
36774 in reporting stats locally.
36775 - Fix an assert trigger: sometimes launching circuits can fail
36776 immediately, e.g. because too many circuits have failed recently.
36777 - Fix a compile warning on 64 bit platforms.
36780 Changes in version 0.0.9pre2 - 2004-10-03
36782 - Make fetching a cached directory work for 64-bit platforms too.
36783 - Make zlib.h a required header, not an optional header.
36786 Changes in version 0.0.9pre1 - 2004-10-01
36788 - Stop using separate defaults for no-config-file and
36789 empty-config-file. Now you have to explicitly turn off SocksPort,
36790 if you don't want it open.
36791 - Fix a bug in OutboundBindAddress so it (hopefully) works.
36792 - Improve man page to mention more of the 0.0.8 features.
36793 - Fix a rare seg fault for people running hidden services on
36794 intermittent connections.
36795 - Change our file IO stuff (especially wrt OpenSSL) so win32 is
36797 - Fix more dns related bugs: send back resolve_failed and end cells
36798 more reliably when the resolve fails, rather than closing the
36799 circuit and then trying to send the cell. Also attach dummy resolve
36800 connections to a circuit *before* calling dns_resolve(), to fix
36801 a bug where cached answers would never be sent in RESOLVED cells.
36802 - When we run out of disk space, or other log writing error, don't
36803 crash. Just stop logging to that log and continue.
36804 - We were starting to daemonize before we opened our logs, so if
36805 there were any problems opening logs, we would complain to stderr,
36806 which wouldn't work, and then mysteriously exit.
36807 - Fix a rare bug where sometimes a verified OR would connect to us
36808 before he'd uploaded his descriptor, which would cause us to
36809 assign conn->nickname as though he's unverified. Now we look through
36810 the fingerprint list to see if he's there.
36811 - Fix a rare assert trigger, where routerinfos for entries in
36812 our cpath would expire while we're building the path.
36815 - Clients can ask dirservers for /dir.z to get a compressed version
36816 of the directory. Only works for servers running 0.0.9, of course.
36817 - Make clients cache directories and use them to seed their router
36818 lists at startup. This means clients have a datadir again.
36819 - Configuration infrastructure support for warning on obsolete
36821 - Respond to content-encoding headers by trying to uncompress as
36823 - Reply with a deflated directory when a client asks for "dir.z".
36824 We could use allow-encodings instead, but allow-encodings isn't
36825 specified in HTTP 1.0.
36826 - Raise the max dns workers from 50 to 100.
36827 - Discourage people from setting their dirfetchpostperiod more often
36828 than once per minute.
36829 - Protect dirservers from overzealous descriptor uploading -- wait
36830 10 seconds after directory gets dirty, before regenerating.
36833 Changes in version 0.0.8 - 2004-08-25
36834 o Port it to SunOS 5.9 / Athena
36837 Changes in version 0.0.8rc2 - 2004-08-20
36838 o Make it compile on cygwin again.
36839 o When picking unverified routers, skip those with low uptime and/or
36840 low bandwidth, depending on what properties you care about.
36843 Changes in version 0.0.8rc1 - 2004-08-18
36844 o Changes from 0.0.7.3:
36846 - Fix assert triggers: if the other side returns an address 0.0.0.0,
36847 don't put it into the client dns cache.
36848 - If a begin failed due to exit policy, but we believe the IP address
36849 should have been allowed, switch that router to exitpolicy reject *:*
36850 until we get our next directory.
36852 - Clients choose nodes proportional to advertised bandwidth.
36853 - Avoid using nodes with low uptime as introduction points.
36854 - Handle servers with dynamic IP addresses: don't replace
36855 options->Address with the resolved one at startup, and
36856 detect our address right before we make a routerinfo each time.
36857 - 'FascistFirewall' option to pick dirservers and ORs on specific
36858 ports; plus 'FirewallPorts' config option to tell FascistFirewall
36859 which ports are open. (Defaults to 80,443)
36860 - Be more aggressive about trying to make circuits when the network
36861 has changed (e.g. when you unsuspend your laptop).
36862 - Check for time skew on http headers; report date in response to
36864 - If the entrynode config line has only one node, don't pick it as
36866 - Add strict{entry|exit}nodes config options. If set to 1, then
36867 we refuse to build circuits that don't include the specified entry
36869 - OutboundBindAddress config option, to bind to a specific
36870 IP address for outgoing connect()s.
36871 - End truncated log entries (e.g. directories) with "[truncated]".
36873 o Patches to 0.0.8preX:
36875 - Patches to compile and run on win32 again (maybe)?
36876 - Fix crash when looking for ~/.torrc with no $HOME set.
36877 - Fix a race bug in the unit tests.
36878 - Handle verified/unverified name collisions better when new
36879 routerinfo's arrive in a directory.
36880 - Sometimes routers were getting entered into the stats before
36881 we'd assigned their identity_digest. Oops.
36882 - Only pick and establish intro points after we've gotten a
36885 - AllowUnverifiedNodes config option to let circuits choose no-name
36886 routers in entry,middle,exit,introduction,rendezvous positions.
36887 Allow middle and rendezvous positions by default.
36888 - Add a man page for tor-resolve.
36891 Changes in version 0.0.7.3 - 2004-08-12
36892 o Stop dnsworkers from triggering an assert failure when you
36893 ask them to resolve the host "".
36896 Changes in version 0.0.8pre3 - 2004-08-09
36897 o Changes from 0.0.7.2:
36898 - Allow multiple ORs with same nickname in routerlist -- now when
36899 people give us one identity key for a nickname, then later
36900 another, we don't constantly complain until the first expires.
36901 - Remember used bandwidth (both in and out), and publish 15-minute
36902 snapshots for the past day into our descriptor.
36903 - You can now fetch $DIRURL/running-routers to get just the
36904 running-routers line, not the whole descriptor list. (But
36905 clients don't use this yet.)
36906 - When people mistakenly use Tor as an http proxy, point them
36907 at the tor-doc.html rather than the INSTALL.
36908 - Remove our mostly unused -- and broken -- hex_encode()
36909 function. Use base16_encode() instead. (Thanks to Timo Lindfors
36910 for pointing out this bug.)
36911 - Rotate onion keys every 12 hours, not every 2 hours, so we have
36912 fewer problems with people using the wrong key.
36913 - Change the default exit policy to reject the default edonkey,
36914 kazaa, gnutella ports.
36915 - Add replace_file() to util.[ch] to handle win32's rename().
36917 o Changes from 0.0.8preX:
36918 - Fix two bugs in saving onion keys to disk when rotating, so
36919 hopefully we'll get fewer people using old onion keys.
36920 - Fix an assert error that was making SocksPolicy not work.
36921 - Be willing to expire routers that have an open dirport -- it's
36922 just the authoritative dirservers we want to not forget.
36923 - Reject tor-resolve requests for .onion addresses early, so we
36924 don't build a whole rendezvous circuit and then fail.
36925 - When you're warning a server that he's unverified, don't cry
36926 wolf unpredictably.
36927 - Fix a race condition: don't try to extend onto a connection
36928 that's still handshaking.
36929 - For servers in clique mode, require the conn to be open before
36930 you'll choose it for your path.
36931 - Fix some cosmetic bugs about duplicate mark-for-close, lack of
36932 end relay cell, etc.
36933 - Measure bandwidth capacity over the last 24 hours, not just 12
36934 - Bugfix: authoritative dirservers were making and signing a new
36935 directory for each client, rather than reusing the cached one.
36938 Changes in version 0.0.8pre2 - 2004-08-04
36939 o Changes from 0.0.7.2:
36941 - Check directory signature _before_ you decide whether you're
36942 you're running an obsolete version and should exit.
36943 - Check directory signature _before_ you parse the running-routers
36944 list to decide who's running or verified.
36945 - Bugfixes and features:
36946 - Check return value of fclose while writing to disk, so we don't
36947 end up with broken files when servers run out of disk space.
36948 - Log a warning if the user uses an unsafe socks variant, so people
36949 are more likely to learn about privoxy or socat.
36950 - Dirservers now include RFC1123-style dates in the HTTP headers,
36951 which one day we will use to better detect clock skew.
36953 o Changes from 0.0.8pre1:
36954 - Make it compile without warnings again on win32.
36955 - Log a warning if you're running an unverified server, to let you
36956 know you might want to get it verified.
36957 - Only pick a default nickname if you plan to be a server.
36960 Changes in version 0.0.8pre1 - 2004-07-23
36962 - Made our unit tests compile again on OpenBSD 3.5, and tor
36963 itself compile again on OpenBSD on a sparc64.
36964 - We were neglecting milliseconds when logging on win32, so
36965 everything appeared to happen at the beginning of each second.
36967 o Protocol changes:
36968 - 'Extend' relay cell payloads now include the digest of the
36969 intended next hop's identity key. Now we can verify that we're
36970 extending to the right router, and also extend to routers we
36971 hadn't heard of before.
36974 - Tor nodes can now act as relays (with an advertised ORPort)
36975 without being manually verified by the dirserver operators.
36976 - Uploaded descriptors of unverified routers are now accepted
36977 by the dirservers, and included in the directory.
36978 - Verified routers are listed by nickname in the running-routers
36979 list; unverified routers are listed as "$<fingerprint>".
36980 - We now use hash-of-identity-key in most places rather than
36981 nickname or addr:port, for improved security/flexibility.
36982 - To avoid Sybil attacks, paths still use only verified servers.
36983 But now we have a chance to play around with hybrid approaches.
36984 - Nodes track bandwidth usage to estimate capacity (not used yet).
36985 - ClientOnly option for nodes that never want to become servers.
36986 - Directory caching.
36987 - "AuthoritativeDir 1" option for the official dirservers.
36988 - Now other nodes (clients and servers) will cache the latest
36989 directory they've pulled down.
36990 - They can enable their DirPort to serve it to others.
36991 - Clients will pull down a directory from any node with an open
36992 DirPort, and check the signature/timestamp correctly.
36993 - Authoritative dirservers now fetch directories from other
36994 authdirservers, to stay better synced.
36995 - Running-routers list tells who's down also, along with noting
36996 if they're verified (listed by nickname) or unverified (listed
36998 - Allow dirservers to serve running-router list separately.
36999 This isn't used yet.
37000 - ORs connect-on-demand to other ORs
37001 - If you get an extend cell to an OR you're not connected to,
37002 connect, handshake, and forward the create cell.
37003 - The authoritative dirservers stay connected to everybody,
37004 and everybody stays connected to 0.0.7 servers, but otherwise
37005 clients/servers expire unused connections after 5 minutes.
37006 - When servers get a sigint, they delay 30 seconds (refusing new
37007 connections) then exit. A second sigint causes immediate exit.
37008 - File and name management:
37009 - Look for .torrc if no CONFDIR "torrc" is found.
37010 - If no datadir is defined, then choose, make, and secure ~/.tor
37012 - If torrc not found, exitpolicy reject *:*.
37013 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
37014 - If no nickname is defined, derive default from hostname.
37015 - Rename secret key files, e.g. identity.key -> secret_id_key,
37016 to discourage people from mailing their identity key to tor-ops.
37017 - Refuse to build a circuit before the directory has arrived --
37018 it won't work anyway, since you won't know the right onion keys
37020 - Try other dirservers immediately if the one you try is down. This
37021 should tolerate down dirservers better now.
37022 - Parse tor version numbers so we can do an is-newer-than check
37023 rather than an is-in-the-list check.
37024 - New socks command 'resolve', to let us shim gethostbyname()
37026 - A 'tor_resolve' script to access the socks resolve functionality.
37027 - A new socks-extensions.txt doc file to describe our
37028 interpretation and extensions to the socks protocols.
37029 - Add a ContactInfo option, which gets published in descriptor.
37030 - Publish OR uptime in descriptor (and thus in directory) too.
37031 - Write tor version at the top of each log file
37032 - New docs in the tarball:
37034 - Document that you should proxy your SSL traffic too.
37037 Changes in version 0.0.7.2 - 2004-07-07
37038 o A better fix for the 0.0.0.0 problem, that will hopefully
37039 eliminate the remaining related assertion failures.
37042 Changes in version 0.0.7.1 - 2004-07-04
37043 o When an address resolves to 0.0.0.0, treat it as a failed resolve,
37044 since internally we use 0.0.0.0 to signify "not yet resolved".
37047 Changes in version 0.0.7 - 2004-06-07
37048 o Updated the man page to reflect the new features.
37051 Changes in version 0.0.7rc2 - 2004-06-06
37052 o Changes from 0.0.7rc1:
37053 - Make it build on Win32 again.
37054 o Changes from 0.0.6.2:
37055 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
37059 Changes in version 0.0.7rc1 - 2004-06-02
37061 - On sighup, we were adding another log without removing the first
37062 one. So log messages would get duplicated n times for n sighups.
37063 - Several cases of using a connection after we'd freed it. The
37064 problem was that connections that are pending resolve are in both
37065 the pending_resolve tree, and also the circuit's resolving_streams
37066 list. When you want to remove one, you must remove it from both.
37067 - Fix a double-mark-for-close where an end cell arrived for a
37068 resolving stream, and then the resolve failed.
37069 - Check directory signatures based on name of signer, not on whom
37070 we got the directory from. This will let us cache directories more
37073 - Crank up some of our constants to handle more users.
37076 Changes in version 0.0.7pre1 - 2004-06-02
37077 o Fixes for crashes and other obnoxious bugs:
37078 - Fix an epipe bug: sometimes when directory connections failed
37079 to connect, we would give them a chance to flush before closing
37081 - When we detached from a circuit because of resolvefailed, we
37082 would immediately try the same circuit twice more, and then
37083 give up on the resolve thinking we'd tried three different
37085 - Limit the number of intro circuits we'll attempt to build for a
37086 hidden service per 15-minute period.
37087 - Check recommended-software string *early*, before actually parsing
37088 the directory. Thus we can detect an obsolete version and exit,
37089 even if the new directory format doesn't parse.
37090 o Fixes for security bugs:
37091 - Remember which nodes are dirservers when you startup, and if a
37092 random OR enables his dirport, don't automatically assume he's
37093 a trusted dirserver.
37095 - Directory connections were asking the wrong poll socket to
37096 start writing, and not asking themselves to start writing.
37097 - When we detached from a circuit because we sent a begin but
37098 didn't get a connected, we would use it again the first time;
37099 but after that we would correctly switch to a different one.
37100 - Stop warning when the first onion decrypt attempt fails; they
37101 will sometimes legitimately fail now that we rotate keys.
37102 - Override unaligned-access-ok check when $host_cpu is ia64 or
37103 arm. Apparently they allow it but the kernel whines.
37104 - Dirservers try to reconnect periodically too, in case connections
37106 - Fix some memory leaks in directory servers.
37107 - Allow backslash in Win32 filenames.
37108 - Made Tor build complain-free on FreeBSD, hopefully without
37109 breaking other BSD builds. We'll see.
37111 - Doxygen markup on all functions and global variables.
37112 - Make directory functions update routerlist, not replace it. So
37113 now directory disagreements are not so critical a problem.
37114 - Remove the upper limit on number of descriptors in a dirserver's
37115 directory (not that we were anywhere close).
37116 - Allow multiple logfiles at different severity ranges.
37117 - Allow *BindAddress to specify ":port" rather than setting *Port
37118 separately. Allow multiple instances of each BindAddress config
37119 option, so you can bind to multiple interfaces if you want.
37120 - Allow multiple exit policy lines, which are processed in order.
37121 Now we don't need that huge line with all the commas in it.
37122 - Enable accept/reject policies on SOCKS connections, so you can bind
37123 to 0.0.0.0 but still control who can use your OP.
37126 Changes in version 0.0.6.2 - 2004-05-16
37127 o Our integrity-checking digest was checking only the most recent cell,
37128 not the previous cells like we'd thought.
37129 Thanks to Stefan Mark for finding the flaw!
37132 Changes in version 0.0.6.1 - 2004-05-06
37133 o Fix two bugs in our AES counter-mode implementation (this affected
37134 onion-level stream encryption, but not TLS-level). It turns
37135 out we were doing something much more akin to a 16-character
37136 polyalphabetic cipher. Oops.
37137 Thanks to Stefan Mark for finding the flaw!
37138 o Retire moria3 as a directory server, and add tor26 as a directory
37142 Changes in version 0.0.6 - 2004-05-02
37143 [version bump only]
37146 Changes in version 0.0.6rc4 - 2004-05-01
37147 o Update the built-in dirservers list to use the new directory format
37148 o Fix a rare seg fault: if a node offering a hidden service attempts
37149 to build a circuit to Alice's rendezvous point and fails before it
37150 reaches the last hop, it retries with a different circuit, but
37152 o Handle windows socket errors correctly.
37155 Changes in version 0.0.6rc3 - 2004-04-28
37156 o Don't expire non-general excess circuits (if we had enough
37157 circuits open, we were expiring rendezvous circuits -- even
37158 when they had a stream attached. oops.)
37159 o Fetch randomness from /dev/urandom better (not via fopen/fread)
37160 o Better debugging for tls errors
37161 o Some versions of openssl have an SSL_pending function that erroneously
37162 returns bytes when there is a non-application record pending.
37163 o Set Content-Type on the directory and hidserv descriptor.
37164 o Remove IVs from cipher code, since AES-ctr has none.
37165 o Win32 fixes. Tor now compiles on win32 with no warnings/errors.
37166 o We were using an array of length zero in a few places.
37167 o win32's gethostbyname can't resolve an IP to an IP.
37168 o win32's close can't close a socket.
37171 Changes in version 0.0.6rc2 - 2004-04-26
37172 o Fix a bug where we were closing tls connections intermittently.
37173 It turns out openssl keeps its errors around -- so if an error
37174 happens, and you don't ask about it, and then another openssl
37175 operation happens and succeeds, and you ask if there was an error,
37176 it tells you about the first error. Fun fun.
37177 o Fix a bug that's been lurking since 27 may 03 (!)
37178 When passing back a destroy cell, we would use the wrong circ id.
37179 'Mostly harmless', but still worth fixing.
37180 o Since we don't support truncateds much, don't bother sending them;
37181 just close the circ.
37182 o check for <machine/limits.h> so we build on NetBSD again (I hope).
37183 o don't crash if a conn that sent a begin has suddenly lost its circuit
37184 (this was quite rare).
37187 Changes in version 0.0.6rc1 - 2004-04-25
37188 o We now rotate link (tls context) keys and onion keys.
37189 o CREATE cells now include oaep padding, so you can tell
37190 if you decrypted them correctly.
37191 o Add bandwidthburst to server descriptor.
37192 o Directories now say which dirserver signed them.
37193 o Use a tor_assert macro that logs failed assertions too.
37196 Changes in version 0.0.6pre5 - 2004-04-18
37197 o changes from 0.0.6pre4:
37198 - make tor build on broken freebsd 5.2 installs
37199 - fix a failed assert when you try an intro point, get a nack, and try
37200 a second one and it works.
37201 - when alice uses a port that the hidden service doesn't accept,
37202 it now sends back an end cell (denied by exit policy). otherwise
37203 alice would just have to wait to time out.
37204 - fix another rare bug: when we had tried all the intro
37205 points for a hidden service, we fetched the descriptor
37206 again, but we left our introcirc thinking it had already
37207 sent an intro, so it kept waiting for a response...
37208 - bugfix: when you sleep your hidden-service laptop, as soon
37209 as it wakes up it tries to upload a service descriptor, but
37210 socketpair fails for some reason (localhost not up yet?).
37211 now we simply give up on that upload, and we'll try again later.
37212 i'd still like to find the bug though.
37213 - if an intro circ waiting for an ack dies before getting one, then
37215 - we were reusing stale service descriptors and refetching usable
37219 Changes in version 0.0.6pre4 - 2004-04-14
37220 o changes from 0.0.6pre3:
37221 - when bob fails to connect to the rendezvous point, and his
37222 circ didn't fail because of the rendezvous point itself, then
37223 he retries a couple of times
37224 - we expire introduction and rendezvous circs more thoroughly
37225 (sometimes they were hanging around forever)
37226 - we expire unattached rendezvous streams that have been around
37227 too long (they were sticking around forever).
37228 - fix a measly fencepost error that was crashing everybody with
37232 Changes in version 0.0.6pre3 - 2004-04-14
37233 o changes from 0.0.6pre2:
37234 - make hup work again
37235 - fix some memory leaks for dirservers
37236 - allow more skew in rendezvous descriptor timestamps, to help
37237 handle people like blanu who don't know what time it is
37238 - normal circs are 3 hops, but some rend/intro circs are 4, if
37239 the initiator doesn't get to choose the last hop
37240 - send acks for introductions, so alice can know whether to try
37242 - bob publishes intro points more correctly
37243 o changes from 0.0.5:
37244 - fix an assert trigger that's been plaguing us since the days
37245 of 0.0.2prexx (thanks weasel!)
37246 - retry stream correctly when we fail to connect because of
37247 exit-policy-reject (should try another) or can't-resolve-address
37248 (also should try another, because dns on random internet servers
37250 - when we hup a dirserver and we've *removed* a server from the
37251 approved-routers list, now we remove that server from the
37252 in-memory directories too
37255 Changes in version 0.0.6pre2 - 2004-04-08
37256 o We fixed our base32 implementation. Now it works on all architectures.
37259 Changes in version 0.0.6pre1 - 2004-04-08
37261 - Hidden services and rendezvous points are implemented. Go to
37262 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
37263 hidden services. (This only works via a socks4a proxy such as
37264 Privoxy, and currently it's quite slow.)
37267 Changes in version 0.0.5 - 2004-03-30
37268 [version bump only]
37271 Changes in version 0.0.5rc3 - 2004-03-29
37272 o Install torrc as torrc.sample -- we no longer clobber your
37274 o Re-enable recommendedversion checking (we broke it in rc2, oops)
37275 o Add in a 'notice' log level for things the operator should hear
37276 but that aren't warnings
37279 Changes in version 0.0.5rc2 - 2004-03-29
37280 o Hold socks connection open until reply is flushed (if possible)
37281 o Make exit nodes resolve IPs to IPs immediately, rather than asking
37282 the dns farm to do it.
37283 o Fix c99 aliasing warnings in rephist.c
37284 o Don't include server descriptors that are older than 24 hours in the
37286 o Give socks 'reject' replies their whole 15s to attempt to flush,
37287 rather than seeing the 60s timeout and assuming the flush had failed.
37288 o Clean automake droppings from the cvs repository
37291 Changes in version 0.0.5rc1 - 2004-03-28
37292 o Fix mangled-state bug in directory fetching (was causing sigpipes).
37293 o Only build circuits after we've fetched the directory: clients were
37294 using only the directory servers before they'd fetched a directory.
37295 This also means longer startup time; so it goes.
37296 o Fix an assert trigger where an OP would fail to handshake, and we'd
37297 expect it to have a nickname.
37298 o Work around a tsocks bug: do a socks reject when AP connection dies
37299 early, else tsocks goes into an infinite loop.
37302 Changes in version 0.0.4 - 2004-03-26
37303 o When connecting to a dirserver or OR and the network is down,
37307 Changes in version 0.0.3 - 2004-03-26
37308 o Warn and fail if server chose a nickname with illegal characters
37309 o Port to Solaris and Sparc:
37310 - include missing header fcntl.h
37311 - have autoconf find -lsocket -lnsl automatically
37312 - deal with hardware word alignment
37313 - make uname() work (solaris has a different return convention)
37314 - switch from using signal() to sigaction()
37315 o Preliminary work on reputation system:
37316 - Keep statistics on success/fail of connect attempts; they're published
37317 by kill -USR1 currently.
37318 - Add a RunTesting option to try to learn link state by creating test
37319 circuits, even when SocksPort is off.
37320 - Remove unused open circuits when there are too many.
37323 Changes in version 0.0.2 - 2004-03-19
37324 - Include strlcpy and strlcat for safer string ops
37325 - define INADDR_NONE so we compile (but still not run) on solaris
37328 Changes in version 0.0.2pre27 - 2004-03-14
37330 - Allow internal tor networks (we were rejecting internal IPs,
37331 now we allow them if they're set explicitly).
37332 - And fix a few endian issues.
37335 Changes in version 0.0.2pre26 - 2004-03-14
37337 - If a stream times out after 15s without a connected cell, don't
37338 try that circuit again: try a new one.
37339 - Retry streams at most 4 times. Then give up.
37340 - When a dirserver gets a descriptor from an unknown router, it
37341 logs its fingerprint (so the dirserver operator can choose to
37342 accept it even without mail from the server operator).
37343 - Inform unapproved servers when we reject their descriptors.
37344 - Make tor build on Windows again. It works as a client, who knows
37346 - Clearer instructions in the torrc for how to set up a server.
37347 - Be more efficient about reading fd's when our global token bucket
37348 (used for rate limiting) becomes empty.
37350 - Stop asserting that computers always go forward in time. It's
37352 - When we sent a cell (e.g. destroy) and then marked an OR connection
37353 expired, we might close it before finishing a flush if the other
37354 side isn't reading right then.
37355 - Don't allow dirservers to start if they haven't defined
37356 RecommendedVersions
37357 - We were caching transient dns failures. Oops.
37358 - Prevent servers from publishing an internal IP as their address.
37359 - Address a strcat vulnerability in circuit.c
37362 Changes in version 0.0.2pre25 - 2004-03-04
37364 - Put the OR's IP in its router descriptor, not its fqdn. That way
37365 we'll stop being stalled by gethostbyname for nodes with flaky dns,
37368 - If the user typed in an address that didn't resolve, the server
37372 Changes in version 0.0.2pre24 - 2004-03-03
37374 - Fix an assertion failure in dns.c, where we were trying to dequeue
37375 a pending dns resolve even if it wasn't pending
37376 - Fix a spurious socks5 warning about still trying to write after the
37377 connection is finished.
37378 - Hold certain marked_for_close connections open until they're finished
37379 flushing, rather than losing bytes by closing them too early.
37380 - Correctly report the reason for ending a stream
37381 - Remove some duplicate calls to connection_mark_for_close
37382 - Put switch_id and start_daemon earlier in the boot sequence, so it
37383 will actually try to chdir() to options.DataDirectory
37384 - Make 'make test' exit(1) if a test fails; fix some unit tests
37385 - Make tor fail when you use a config option it doesn't know about,
37386 rather than warn and continue.
37387 - Make --version work
37388 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
37391 Changes in version 0.0.2pre23 - 2004-02-29
37393 - Print a statement when the first circ is finished, so the user
37394 knows it's working.
37395 - If a relay cell is unrecognized at the end of the circuit,
37396 send back a destroy. (So attacks to mutate cells are more
37398 - New config option 'excludenodes' to avoid certain nodes for circuits.
37399 - When it daemonizes, it chdir's to the DataDirectory rather than "/",
37400 so you can collect coredumps there.
37402 - Fix a bug in tls flushing where sometimes data got wedged and
37403 didn't flush until more data got sent. Hopefully this bug was
37404 a big factor in the random delays we were seeing.
37405 - Make 'connected' cells include the resolved IP, so the client
37406 dns cache actually gets populated.
37407 - Disallow changing from ORPort=0 to ORPort>0 on hup.
37408 - When we time-out on a stream and detach from the circuit, send an
37409 end cell down it first.
37410 - Only warn about an unknown router (in exitnodes, entrynodes,
37411 excludenodes) after we've fetched a directory.
37414 Changes in version 0.0.2pre22 - 2004-02-26
37416 - Servers publish less revealing uname information in descriptors.
37417 - More memory tracking and assertions, to crash more usefully when
37419 - If the default torrc isn't there, just use some default defaults.
37420 Plus provide an internal dirservers file if they don't have one.
37421 - When the user tries to use Tor as an http proxy, give them an http
37422 501 failure explaining that we're a socks proxy.
37423 - Dump a new router.desc on hup, to help confused people who change
37424 their exit policies and then wonder why router.desc doesn't reflect
37426 - Clean up the generic tor.sh init script that we ship with.
37428 - If the exit stream is pending on the resolve, and a destroy arrives,
37429 then the stream wasn't getting removed from the pending list. I
37430 think this was the one causing recent server crashes.
37431 - Use a more robust poll on OSX 10.3, since their poll is flaky.
37432 - When it couldn't resolve any dirservers, it was useless from then on.
37433 Now it reloads the RouterFile (or default dirservers) if it has no
37435 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
37436 many users don't even *have* a /usr/local/sbin/.
37439 Changes in version 0.0.2pre21 - 2004-02-18
37441 - There's a ChangeLog file that actually reflects the changelog.
37442 - There's a 'torify' wrapper script, with an accompanying
37443 tor-tsocks.conf, that simplifies the process of using tsocks for
37444 tor. It even has a man page.
37445 - The tor binary gets installed to sbin rather than bin now.
37446 - Retry streams where the connected cell hasn't arrived in 15 seconds
37447 - Clean up exit policy handling -- get the default out of the torrc,
37448 so we can update it without forcing each server operator to fix
37450 - Allow imaps and pop3s in default exit policy
37452 - Prevent picking middleman nodes as the last node in the circuit
37455 Changes in version 0.0.2pre20 - 2004-01-30
37457 - We now have a deb package, and it's in debian unstable. Go to
37458 it, apt-getters. :)
37459 - I've split the TotalBandwidth option into BandwidthRate (how many
37460 bytes per second you want to allow, long-term) and
37461 BandwidthBurst (how many bytes you will allow at once before the cap
37462 kicks in). This better token bucket approach lets you, say, set
37463 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
37464 performance while not exceeding your monthly bandwidth quota.
37465 - Push out a tls record's worth of data once you've got it, rather
37466 than waiting until you've read everything waiting to be read. This
37467 may improve performance by pipelining better. We'll see.
37468 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
37469 from failed circuits (if they haven't been connected yet) and attach
37471 - Expire old streams that haven't managed to connect. Some day we'll
37472 have them reattach to new circuits instead.
37475 - Fix several memory leaks that were causing servers to become bloated
37477 - Fix a few very rare assert triggers. A few more remain.
37478 - Setuid to User _before_ complaining about running as root.
37481 Changes in version 0.0.2pre19 - 2004-01-07
37483 - Fix deadlock condition in dns farm. We were telling a child to die by
37484 closing the parent's file descriptor to him. But newer children were
37485 inheriting the open file descriptor from the parent, and since they
37486 weren't closing it, the socket never closed, so the child never read
37487 eof, so he never knew to exit. Similarly, dns workers were holding
37488 open other sockets, leading to all sorts of chaos.
37489 - New cleaner daemon() code for forking and backgrounding.
37490 - If you log to a file, it now prints an entry at the top of the
37491 logfile so you know it's working.
37492 - The onionskin challenge length was 30 bytes longer than necessary.
37493 - Started to patch up the spec so it's not quite so out of date.
37496 Changes in version 0.0.2pre18 - 2004-01-02
37498 - Fix endian issues with the 'integrity' field in the relay header.
37499 - Fix a potential bug where connections in state
37500 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
37503 Changes in version 0.0.2pre17 - 2003-12-30
37505 - Made --debuglogfile (or any second log file, actually) work.
37506 - Resolved an edge case in get_unique_circ_id_by_conn where a smart
37507 adversary could force us into an infinite loop.
37510 - Each onionskin handshake now includes a hash of the computed key,
37511 to prove the server's identity and help perfect forward secrecy.
37512 - Changed cell size from 256 to 512 bytes (working toward compatibility
37514 - Changed cell length to 2 bytes, and moved it to the relay header.
37515 - Implemented end-to-end integrity checking for the payloads of
37517 - Separated streamid from 'recognized' (otherwise circuits will get
37518 messed up when we try to have streams exit from the middle). We
37519 use the integrity-checking to confirm that a cell is addressed to
37521 - Randomize the initial circid and streamid values, so an adversary who
37522 breaks into a node can't learn how many circuits or streams have
37526 Changes in version 0.0.2pre16 - 2003-12-14
37528 - Fixed a bug that made HUP trigger an assert
37529 - Fixed a bug where a circuit that immediately failed wasn't being
37530 counted as a failed circuit in counting retries.
37533 - Now we close the circuit when we get a truncated cell: otherwise we're
37534 open to an anonymity attack where a bad node in the path truncates
37535 the circuit and then we open streams at him.
37536 - Add port ranges to exit policies
37537 - Add a conservative default exit policy
37538 - Warn if you're running tor as root
37539 - on HUP, retry OR connections and close/rebind listeners
37540 - options.EntryNodes: try these nodes first when picking the first node
37541 - options.ExitNodes: if your best choices happen to include any of
37542 your preferred exit nodes, you choose among just those preferred
37544 - options.ExcludedNodes: nodes that are never picked in path building
37547 Changes in version 0.0.2pre15 - 2003-12-03
37548 o Robustness and bugfixes:
37549 - Sometimes clients would cache incorrect DNS resolves, which would
37550 really screw things up.
37551 - An OP that goes offline would slowly leak all its sockets and stop
37553 - A wide variety of bugfixes in exit node selection, exit policy
37554 handling, and processing pending streams when a new circuit is
37556 - Pick nodes for a path only from those the directory says are up
37557 - Choose randomly from all running dirservers, not always the first one
37558 - Increase allowed http header size for directory fetch.
37559 - Stop writing to stderr (if we're daemonized it will be closed).
37560 - Enable -g always, so cores will be more useful to me.
37561 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
37564 - Wrote a man page. It lists commonly used options.
37567 - Change default loglevel to warn.
37568 - Make PidFile default to null rather than littering in your CWD.
37569 - OnionRouter config option is now obsolete. Instead it just checks
37571 - Moved to a single unified torrc file for both clients and servers.
37574 Changes in version 0.0.2pre14 - 2003-11-29
37575 o Robustness and bugfixes:
37576 - Force the admin to make the DataDirectory himself
37577 - to get ownership/permissions right
37578 - so clients no longer make a DataDirectory and then never use it
37579 - fix bug where a client who was offline for 45 minutes would never
37580 pull down a directory again
37581 - fix (or at least hide really well) the dns assert bug that was
37582 causing server crashes
37583 - warnings and improved robustness wrt clockskew for certs
37584 - use the native daemon(3) to daemonize, when available
37585 - exit if bind() fails
37586 - exit if neither socksport nor orport is defined
37587 - include our own tor_timegm (Win32 doesn't have its own)
37588 - bugfix for win32 with lots of connections
37589 - fix minor bias in PRNG
37590 - make dirserver more robust to corrupt cached directory
37593 - Wrote the design document (woo)
37595 o Circuit building and exit policies:
37596 - Circuits no longer try to use nodes that the directory has told them
37598 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
37599 bitcounts (18.0.0.0/8).
37600 - Make AP connections standby for a circuit if no suitable circuit
37601 exists, rather than failing
37602 - Circuits choose exit node based on addr/port, exit policies, and
37603 which AP connections are standing by
37604 - Bump min pathlen from 2 to 3
37605 - Relay end cells have a payload to describe why the stream ended.
37606 - If the stream failed because of exit policy, try again with a new
37608 - Clients have a dns cache to remember resolved addresses.
37609 - Notice more quickly when we have no working circuits
37612 - APPort is now called SocksPort
37613 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
37615 - RecommendedVersions is now a config variable rather than
37616 hardcoded (for dirservers)
37617 - Reloads config on HUP
37618 - Usage info on -h or --help
37619 - If you set User and Group config vars, it'll setu/gid to them.
37622 Changes in version 0.0.2pre13 - 2003-10-19
37623 o General stability:
37624 - SSL_write no longer fails when it returns WANTWRITE and the number
37625 of bytes in the buf has changed by the next SSL_write call.
37626 - Fix segfault fetching directory when network is down
37627 - Fix a variety of minor memory leaks
37628 - Dirservers reload the fingerprints file on HUP, so I don't have
37629 to take down the network when I approve a new router
37630 - Default server config file has explicit Address line to specify fqdn
37633 - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
37634 - Make listener connections not ever alloc bufs
37636 o Autoconf improvements:
37637 - don't clobber an external CFLAGS in ./configure
37638 - Make install now works
37639 - create var/lib/tor on make install
37640 - autocreate a tor.sh initscript to help distribs
37641 - autocreate the torrc and sample-server-torrc with correct paths
37643 o Log files and Daemonizing now work:
37644 - If --DebugLogFile is specified, log to it at -l debug
37645 - If --LogFile is specified, use it instead of commandline
37646 - If --RunAsDaemon is set, tor forks and backgrounds on startup