1 Changes in version 0.4.5.10 - 2021-08-13
2 This version fixes several bugs from earlier versions.
4 o Minor feature (fallbackdir):
5 - Regenerate fallback directories list. Close ticket 40447.
7 o Minor features (geoip data):
8 - Update the geoip files to match the IPFire Location Database,
9 as retrieved on 2021/08/12.
11 o Minor features (testing):
12 - Enable the deterministic RNG for unit tests that covers the address set
13 bloomfilter-based API's. Fixes bug 40419; bugfix on 0.3.3.2-alpha.
15 o Minor bugfix (crypto):
16 - Disable the unused batch verification feature of ed25519-donna. Fixes
17 bug 40078; bugfix on 0.2.6.1-alpha. Found by Henry de Valence.
19 o Minor bugfixes (relay, backport from 0.4.6.x):
20 - Reduce the compression level for data streaming from HIGH to LOW. Fixes
21 bug 40301; bugfix on 0.3.5.1-alpha.
23 o Minor bugfixes (timekeeping, backport from 0.4.6.x):
24 - Calculate the time of day correctly on systems where the time_t
25 type includes leap seconds. (This is not the case on most
26 operating systems, but on those where it occurs, our tor_timegm
27 function did not correctly invert the system's gmtime function,
28 which could result in assertion failures when calculating
29 voting schedules.) Fixes bug 40383; bugfix on 0.2.0.3-alpha.
31 o Minor bugfixes (warnings, portability, backport from 0.4.6.x):
32 - Suppress a strict-prototype warning when building with some versions
33 of NSS. Fixes bug 40409; bugfix on 0.3.5.1-alpha.
36 Changes in version 0.4.5.9 - 2021-06-14
37 Tor 0.4.5.9 fixes several security issues, including a
38 denial-of-service attack against onion service clients, and another
39 denial-of-service attack against relays. Everybody should upgrade to
40 one of 0.3.5.15, 0.4.4.9, 0.4.5.9, or 0.4.6.5.
42 o Major bugfixes (security, backport from 0.4.6.5):
43 - Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on
44 half-closed streams. Previously, clients failed to validate which
45 hop sent these cells: this would allow a relay on a circuit to end
46 a stream that wasn't actually built with it. Fixes bug 40389;
47 bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2021-
48 003 and CVE-2021-34548.
50 o Major bugfixes (security, defense-in-depth, backport from 0.4.6.5):
51 - Detect more failure conditions from the OpenSSL RNG code.
52 Previously, we would detect errors from a missing RNG
53 implementation, but not failures from the RNG code itself.
54 Fortunately, it appears those failures do not happen in practice
55 when Tor is using OpenSSL's default RNG implementation. Fixes bug
56 40390; bugfix on 0.2.8.1-alpha. This issue is also tracked as
57 TROVE-2021-004. Reported by Jann Horn at Google's Project Zero.
59 o Major bugfixes (security, denial of service, backport from 0.4.6.5):
60 - Resist a hashtable-based CPU denial-of-service attack against
61 relays. Previously we used a naive unkeyed hash function to look
62 up circuits in a circuitmux object. An attacker could exploit this
63 to construct circuits with chosen circuit IDs, to create
64 collisions and make the hash table inefficient. Now we use a
65 SipHash construction here instead. Fixes bug 40391; bugfix on
66 0.2.4.4-alpha. This issue is also tracked as TROVE-2021-005 and
67 CVE-2021-34549. Reported by Jann Horn from Google's Project Zero.
68 - Fix an out-of-bounds memory access in v3 onion service descriptor
69 parsing. An attacker could exploit this bug by crafting an onion
70 service descriptor that would crash any client that tried to visit
71 it. Fixes bug 40392; bugfix on 0.3.0.1-alpha. This issue is also
72 tracked as TROVE-2021-006 and CVE-2021-34550. Reported by Sergei
73 Glazunov from Google's Project Zero.
75 o Minor features (compatibility, backport from 0.4.6.4-rc):
76 - Remove an assertion function related to TLS renegotiation. It was
77 used nowhere outside the unit tests, and it was breaking
78 compilation with recent alpha releases of OpenSSL 3.0.0. Closes
81 o Minor features (geoip data):
82 - Update the geoip files to match the IPFire Location Database, as
83 retrieved on 2021/06/10.
85 o Minor bugfixes (control, sandbox, backport from 0.4.6.4-rc):
86 - Allow the control command SAVECONF to succeed when the seccomp
87 sandbox is enabled, and make SAVECONF keep only one backup file to
88 simplify implementation. Previously SAVECONF allowed a large
89 number of backup files, which made it incompatible with the
90 sandbox. Fixes bug 40317; bugfix on 0.2.5.4-alpha. Patch by
93 o Minor bugfixes (metrics port, backport from 0.4.6.4-rc):
94 - Fix a bug that made tor try to re-bind() on an already open
95 MetricsPort every 60 seconds. Fixes bug 40370; bugfix
99 Changes in version 0.4.5.8 - 2021-05-10
100 Tor 0.4.5.8 fixes several bugs in earlier version, backporting fixes
101 from the 0.4.6.x series.
103 o Minor features (compatibility, Linux seccomp sandbox, backport from 0.4.6.3-rc):
104 - Add a workaround to enable the Linux sandbox to work correctly
105 with Glibc 2.33. This version of Glibc has started using the
106 fstatat() system call, which previously our sandbox did not allow.
107 Closes ticket 40382; see the ticket for a discussion of trade-offs.
109 o Minor features (compilation, backport from 0.4.6.3-rc):
110 - Make the autoconf script build correctly with autoconf versions
111 2.70 and later. Closes part of ticket 40335.
113 o Minor features (fallback directory list, backport from 0.4.6.2-alpha):
114 - Regenerate the list of fallback directories to contain a new set
115 of 200 relays. Closes ticket 40265.
117 o Minor features (geoip data):
118 - Update the geoip files to match the IPFire Location Database, as
119 retrieved on 2021/05/07.
121 o Minor features (onion services):
122 - Add warning message when connecting to now deprecated v2 onion
123 services. As announced, Tor 0.4.5.x is the last series that will
124 support v2 onions. Closes ticket 40373.
126 o Minor bugfixes (bridge, pluggable transport, backport from 0.4.6.2-alpha):
127 - Fix a regression that made it impossible start Tor using a bridge
128 line with a transport name and no fingerprint. Fixes bug 40360;
129 bugfix on 0.4.5.4-rc.
131 o Minor bugfixes (build, cross-compilation, backport from 0.4.6.3-rc):
132 - Allow a custom "ar" for cross-compilation. Our previous build
133 script had used the $AR environment variable in most places, but
134 it missed one. Fixes bug 40369; bugfix on 0.4.5.1-alpha.
136 o Minor bugfixes (channel, DoS, backport from 0.4.6.2-alpha):
137 - Fix a non-fatal BUG() message due to a too-early free of a string,
138 when listing a client connection from the DoS defenses subsystem.
139 Fixes bug 40345; bugfix on 0.4.3.4-rc.
141 o Minor bugfixes (compiler warnings, backport from 0.4.6.3-rc):
142 - Fix an indentation problem that led to a warning from GCC 11.1.1.
143 Fixes bug 40380; bugfix on 0.3.0.1-alpha.
145 o Minor bugfixes (controller, backport from 0.4.6.1-alpha):
146 - Fix a "BUG" warning that would appear when a controller chooses
147 the first hop for a circuit, and that circuit completes. Fixes bug
148 40285; bugfix on 0.3.2.1-alpha.
150 o Minor bugfixes (onion service, client, memory leak, backport from 0.4.6.3-rc):
151 - Fix a bug where an expired cached descriptor could get overwritten
152 with a new one without freeing it, leading to a memory leak. Fixes
153 bug 40356; bugfix on 0.3.5.1-alpha.
155 o Minor bugfixes (testing, BSD, backport from 0.4.6.2-alpha):
156 - Fix pattern-matching errors when patterns expand to invalid paths
157 on BSD systems. Fixes bug 40318; bugfix on 0.4.5.1-alpha. Patch by
161 Changes in version 0.4.5.7 - 2021-03-16
162 Tor 0.4.5.7 fixes two important denial-of-service bugs in earlier
165 One of these vulnerabilities (TROVE-2021-001) would allow an attacker
166 who can send directory data to a Tor instance to force that Tor
167 instance to consume huge amounts of CPU. This is easiest to exploit
168 against authorities, since anybody can upload to them, but directory
169 caches could also exploit this vulnerability against relays or clients
170 when they download. The other vulnerability (TROVE-2021-002) only
171 affects directory authorities, and would allow an attacker to remotely
172 crash the authority with an assertion failure. Patches have already
173 been provided to the authority operators, to help ensure
176 We recommend that everybody upgrade to one of the releases that fixes
177 these issues (0.3.5.14, 0.4.4.8, or 0.4.5.7) as they become available
180 This release also updates our GeoIP data source, and fixes a few
181 smaller bugs in earlier releases.
183 o Major bugfixes (security, denial of service):
184 - Disable the dump_desc() function that we used to dump unparseable
185 information to disk. It was called incorrectly in several places,
186 in a way that could lead to excessive CPU usage. Fixes bug 40286;
187 bugfix on 0.2.2.1-alpha. This bug is also tracked as TROVE-2021-
188 001 and CVE-2021-28089.
189 - Fix a bug in appending detached signatures to a pending consensus
190 document that could be used to crash a directory authority. Fixes
191 bug 40316; bugfix on 0.2.2.6-alpha. Tracked as TROVE-2021-002
194 o Minor features (geoip data):
195 - We have switched geoip data sources. Previously we shipped IP-to-
196 country mappings from Maxmind's GeoLite2, but in 2019 they changed
197 their licensing terms, so we were unable to update them after that
198 point. We now ship geoip files based on the IPFire Location
199 Database instead. (See https://location.ipfire.org/ for more
200 information). This release updates our geoip files to match the
201 IPFire Location Database as retrieved on 2021/03/12. Closes
204 o Minor bugfixes (directory authority):
205 - Now that exit relays don't allow exit connections to directory
206 authority DirPorts (to prevent network reentry), disable
207 authorities' reachability self test on the DirPort. Fixes bug
208 40287; bugfix on 0.4.5.5-rc.
210 o Minor bugfixes (documentation):
211 - Fix a formatting error in the documentation for
212 VirtualAddrNetworkIPv6. Fixes bug 40256; bugfix on 0.2.9.4-alpha.
214 o Minor bugfixes (Linux, relay):
215 - Fix a bug in determining total available system memory that would
216 have been triggered if the format of Linux's /proc/meminfo file
217 had ever changed to include "MemTotal:" in the middle of a line.
218 Fixes bug 40315; bugfix on 0.2.5.4-alpha.
220 o Minor bugfixes (metrics port):
221 - Fix a BUG() warning on the MetricsPort for an internal missing
222 handler. Fixes bug 40295; bugfix on 0.4.5.1-alpha.
224 o Minor bugfixes (onion service):
225 - Remove a harmless BUG() warning when reloading tor configured with
226 onion services. Fixes bug 40334; bugfix on 0.4.5.1-alpha.
228 o Minor bugfixes (portability):
229 - Fix a non-portable usage of "==" with "test" in the configure
230 script. Fixes bug 40298; bugfix on 0.4.5.1-alpha.
232 o Minor bugfixes (relay):
233 - Remove a spammy log notice falsely claiming that the IPv4/v6
234 address was missing. Fixes bug 40300; bugfix on 0.4.5.1-alpha.
235 - Do not query the address cache early in the boot process when
236 deciding if a relay needs to fetch early directory information
237 from an authority. This bug resulted in a relay falsely believing
238 it didn't have an address and thus triggering an authority fetch
239 at each boot. Related to our fix for 40300.
241 o Removed features (mallinfo deprecated):
242 - Remove mallinfo() usage entirely. Libc 2.33+ now deprecates it.
246 Changes in version 0.4.5.6 - 2021-02-15
247 The Tor 0.4.5.x release series is dedicated to the memory of Karsten
248 Loesing (1979-2020), Tor developer, cypherpunk, husband, and father.
249 Karsten is best known for creating the Tor metrics portal and leading
250 the metrics team, but he was involved in Tor from the early days. For
251 example, while he was still a student he invented and implemented the
252 v2 onion service directory design, and he also served as an ambassador
253 to the many German researchers working in the anonymity field. We
254 loved him and respected him for his patience, his consistency, and his
255 welcoming approach to growing our community.
257 This release series introduces significant improvements in relay IPv6
258 address discovery, a new "MetricsPort" mechanism for relay operators
259 to measure performance, LTTng support, build system improvements to
260 help when using Tor as a static library, and significant bugfixes
261 related to Windows relay performance. It also includes numerous
262 smaller features and bugfixes.
264 Below are the changes since 0.4.4.4-rc. For a complete list of changes
265 since 0.4.4.7, see the ReleaseNotes file.
267 o Major bugfixes (IPv6, relay):
268 - Fix a bug that prevented a relay from publishing its descriptor if
269 an auto-discovered IPv6 that was found unreachable. Fixes bug
270 40279; bugfix on 0.4.5.1-alpha.
272 o Minor features (protocol versions):
273 - Stop claiming to support the "DirCache=1" subprotocol version.
274 Technically, we stopped supporting this subprotocol back in
275 0.4.5.1-alpha, but we needed to wait for the authorities to stop
276 listing it as "required" before we could drop it from the list.
279 o Minor bugfixes (logging):
280 - Avoid a spurious log message about missing subprotocol versions,
281 when the consensus that we're reading from is older than the
282 current release. Previously we had made this message nonfatal, but
283 in practice, it is never relevant when the consensus is older than
284 the current release. Fixes bug 40281; bugfix on 0.4.0.1-alpha.
286 o Minor bugfixes (metrics port):
287 - Fix a bug warning when a metrics port socket was unexpectedly
288 closed. Fixes bug 40257; bugfix on 0.4.5.1-alpha
290 o Minor bugfixes (relay):
291 - Allow relays to have a RFC1918 address if PublishServerDescriptor
292 is set to 0 and AssumeReachable is set to 1. This is to support
293 the use case of a bridge on a local network, exposed via a
294 pluggable transport. Fixes bug 40208; bugfix on 0.4.5.1-alpha.
296 o Minor bugfixes (relay, config):
297 - Fix a problem in the removal of duplicate ORPorts from the
298 internal port list when loading the config file. We were removing
299 the wrong ports, breaking valid torrc uses cases for multiple
300 ORPorts of the same address family. Fixes bug 40289; bugfix
304 Changes in version 0.4.5.5-rc - 2021-02-01
305 Tor 0.4.5.5-rc is the third release candidate in its series. We're
306 coming closer and closer to a stable release series. This release
307 fixes an annoyance with address detection code, and somewhat mitigates
308 an ongoing denial-of-service attack.
310 We anticipate no more code changes between this and the stable
311 release, though of course that could change.
313 o Major feature (exit):
314 - Re-entry into the network is now denied at the Exit level to all
315 relays' ORPorts and authorities' ORPorts and DirPorts. This change
316 should help mitgate a set of denial-of-service attacks. Closes
319 o Minor bugfixes (relay, configuration):
320 - Don't attempt to discover our address (IPv4 or IPv6) if no ORPort
321 for it can be found in the configuration. Fixes bug 40254; bugfix
325 Changes in version 0.4.5.4-rc - 2021-01-22
326 Tor 0.4.5.4-rc is the second release candidate in its series. It fixes
327 several bugs present in previous releases.
329 We expect that the stable release will be the same, or almost the
330 same, as this release candidate, unless serious bugs are found.
332 o Major bugfixes (authority, IPv6):
333 - Do not consider multiple relays in the same IPv6 /64 network to be
334 sybils. Fixes bug 40243; bugfix on 0.4.5.1-alpha.
336 o Major bugfixes (directory cache, performance, windows):
337 - Limit the number of items in the consensus diff cache to 64 on
338 Windows. We hope this will mitigate an issue where Windows relay
339 operators reported Tor using 100% CPU, while we investigate better
340 solutions. Fixes bug 24857; bugfix on 0.3.1.1-alpha.
342 o Minor feature (build system):
343 - New "make lsp" command to generate the compile_commands.json file
344 used by the ccls language server. The "bear" program is needed for
345 this. Closes ticket 40227.
347 o Minor features (authority, logging):
348 - Log more information for directory authority operators during the
349 consensus voting process, and while processing relay descriptors.
351 - Reject obsolete router/extrainfo descriptors earlier and more
352 quietly, to avoid spamming the logs. Fixes bug 40238; bugfix
355 o Minor bugfixes (compilation):
356 - Fix another warning about unreachable fallthrough annotations when
357 building with "--enable-all-bugs-are-fatal" on some compilers.
358 Fixes bug 40241; bugfix on 0.4.5.3-rc.
359 - Change the linker flag ordering in our library search code so that
360 it works for compilers that need the libraries to be listed in the
361 right order. Fixes bug 33624; bugfix on 0.1.1.0-alpha.
363 o Minor bugfixes (config, bridge):
364 - Don't initiate a connection to a bridge configured to use a
365 missing transport. This change reverts an earlier fix that would
366 try to avoid such situations during configuration chcecking, but
367 which doesn't work with DisableNetwork. Fixes bug 40106; bugfix
370 o Minor bugfixes (onion services):
371 - Avoid a non-fatal assertion in certain edge-cases when
372 establishing a circuit to an onion service. Fixes bug 32666;
373 bugfix on 0.3.0.3-alpha.
375 o Minor bugfixes (relay):
376 - If we were unable to build our descriptor, don't mark it as having
377 been advertised. Also remove an harmless BUG(). Fixes bug 40231;
378 bugfix on 0.4.5.1-alpha.
381 Changes in version 0.4.5.3-rc - 2021-01-12
382 Tor 0.4.5.3-rc is the first release candidate in its series. It fixes
383 several bugs, including one that broke onion services on certain older
386 Though we anticipate that we'll be doing a bit more clean-up between
387 now and the stable release, we expect that our remaining changes will
388 be fairly simple. There will be at least one more release candidate
389 before 0.4.5.x is stable.
391 o Major bugfixes (onion service v3):
392 - Stop requiring a live consensus for v3 clients and services, and
393 allow a "reasonably live" consensus instead. This allows v3 onion
394 services to work even if the authorities fail to generate a
395 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
398 o Minor features (crypto):
399 - Fix undefined behavior on our Keccak library. The bug only
400 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
401 and would result in wrong digests. Fixes bug 40210; bugfix on
402 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
403 weasel for diagnosing this.
405 o Minor features (documentation):
406 - Mention the "!badexit" directive that can appear in an authority's
407 approved-routers file, and update the description of the
408 "!invalid" directive. Closes ticket 40188.
410 o Minor bugfixes (compilation):
411 - Fix a compilation warning about unreachable fallthrough
412 annotations when building with "--enable-all-bugs-are-fatal" on
413 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
414 - Fix the "--enable-static-tor" switch to properly set the "-static"
415 compile option onto the tor binary only. Fixes bug 40111; bugfix
418 o Minor bugfixes (config, bridge):
419 - Really fix the case where torrc has a missing ClientTransportPlugin
420 but is configured with a Bridge line and UseBridges. Previously,
421 we didn't look at the managed proxy list and thus would fail for
422 the "exec" case. Fixes bug 40106; bugfix on 0.4.5.1-alpha.
424 o Minor bugfixes (logging, relay):
425 - Log our address as reported by the directory authorities, if none
426 was configured or detected before. Fixes bug 40201; bugfix
428 - When a launching bandwidth testing circuit, don't incorrectly call
429 it a reachability test, or trigger a "CHECKING_REACHABILITY"
430 control event. Fixes bug 40205; bugfix on 0.4.5.1-alpha.
432 o Minor bugfixes (relay, statistics):
433 - Report the correct connection statistics in our extrainfo
434 documents. Previously there was a problem in the file loading
435 function which would wrongly truncate a state file, causing the
436 wrong information to be reported. Fixes bug 40226; bugfix
439 o Minor bugfixes (SOCKS5):
440 - Handle partial SOCKS5 messages correctly. Previously, our code
441 would send an incorrect error message if it got a SOCKS5 request
442 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
445 Changes in version 0.4.5.2-alpha - 2020-11-23
446 Tor 0.4.5.2-alpha is the second alpha release in the 0.4.5.x series.
447 It fixes several bugs present in earlier releases, including one that
448 made it impractical to run relays on Windows. It also adds a few small
449 safety features to improve Tor's behavior in the presence of strange
450 compile-time options, misbehaving proxies, and future versions
453 o Major bugfixes (relay, windows):
454 - Fix a bug in our implementation of condition variables on Windows.
455 Previously, a relay on Windows would use 100% CPU after running
456 for some time. Because of this change, Tor now require Windows
457 Vista or later to build and run. Fixes bug 30187; bugfix on
458 0.2.6.3-alpha. (This bug became more serious in 0.3.1.1-alpha with
459 the introduction of consensus diffs.) Patch by Daniel Pinto.
461 o Minor features (compilation):
462 - Disable deprecation warnings when building with OpenSSL 3.0.0 or
463 later. There are a number of APIs newly deprecated in OpenSSL
464 3.0.0 that Tor still requires. (A later version of Tor will try to
465 stop depending on these APIs.) Closes ticket 40165.
467 o Minor features (protocol, proxy support, defense in depth):
468 - Respond more deliberately to misbehaving proxies that leave
469 leftover data on their connections, so as to make Tor even less
470 likely to allow the proxies to pass their data off as having come
471 from a relay. Closes ticket 40017.
473 o Minor features (safety):
474 - Log a warning at startup if Tor is built with compile-time options
475 that are likely to make it less stable or reliable. Closes
478 o Minor bugfixes (circuit, handshake):
479 - In the v3 handshaking code, use connection_or_change_state() to
480 change the state. Previously, we changed the state directly, but
481 this did not pass the state change to the pubsub or channel
482 objects, potentially leading to bugs. Fixes bug 32880; bugfix on
483 0.2.3.6-alpha. Patch by Neel Chauhan.
485 o Minor bugfixes (compilation):
486 - Use the correct 'ranlib' program when building libtor.a.
487 Previously we used the default ranlib, which broke some kinds of
488 cross-compilation. Fixes bug 40172; bugfix on 0.4.5.1-alpha.
489 - Remove a duplicate typedef in metrics_store.c. Fixes bug 40177;
490 bugfix on 0.4.5.1-alpha.
491 - When USDT tracing is enabled, and STAP_PROBEV() is missing, don't
492 attempt to build. Linux supports that macro but not the BSDs.
493 Fixes bug 40174; bugfix on 0.4.5.1-alpha.
495 o Minor bugfixes (configuration):
496 - Exit Tor on a misconfiguration when the Bridge line is configured
497 to use a transport but no corresponding ClientTransportPlugin can
498 be found. Prior to this fix, Tor would attempt to connect to the
499 bridge directly without using the transport, making it easier for
500 adversaries to notice the bridge. Fixes bug 25528; bugfix
502 - Fix an issue where an ORPort was compared with other kinds of
503 ports, when it should have been only checked against other
504 ORPorts. This bug would lead to "DirPort auto" getting ignored.
505 Fixes bug 40195; bugfix on 0.4.5.1-alpha.
506 - Fix a bug where a second non-ORPort with a variant family (ex:
507 SocksPort [::1]:9050) would be ignored due to a configuration
508 parsing error. Fixes bug 40183; bugfix on 0.4.5.1-alpha.
510 o Minor bugfixes (crash, relay, signing key):
511 - Avoid assertion failures when we run Tor from the command line
512 with `--key-expiration sign`, but an ORPort is not set. Fixes bug
513 40015; bugfix on 0.3.2.1-alpha. Patch by Neel Chauhan.
515 o Minor bugfixes (logging):
516 - Remove trailing whitespace from control event log messages. Fixes
517 bug 32178; bugfix on 0.1.1.1-alpha. Based on a patch by
519 - Turn warning-level log message about SENDME failure into a debug-
520 level message. (This event can happen naturally, and is no reason
521 for concern). Fixes bug 40142; bugfix on 0.4.1.1-alpha.
523 o Minor bugfixes (relay, address discovery):
524 - Don't trigger an IP change when no new valid IP can be found.
525 Fixes bug 40071; bugfix on 0.4.5.1-alpha.
526 - When attempting to discover our IP, use a simple test circuit,
527 rather than a descriptor fetch: the same address information is
528 present in NETINFO cells, and is better authenticated there. Fixes
529 bug 40071; bugfix on 0.4.5.1-alpha.
531 o Minor bugfixes (testing):
532 - Fix the `config/parse_tcp_proxy_line` test so that it works
533 correctly on systems where the DNS provider hijacks invalid
534 queries. Fixes part of bug 40179; bugfix on 0.4.3.1-alpha.
535 - Fix unit tests that used newly generated list of routers so that
536 they check them with respect to the date when they were generated,
537 not with respect to the current time. Fixes bug 40187; bugfix
539 - Fix our Python reference-implementation for the v3 onion service
540 handshake so that it works correctly with the version of hashlib
541 provided by Python 3.9. Fixes part of bug 40179; bugfix
543 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
544 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
546 o Removed features (controller):
547 - Remove the "GETINFO network-status" controller command. It has
548 been deprecated since 0.3.1.1-alpha. Closes ticket 22473.
551 Changes in version 0.4.4.6 - 2020-11-12
552 Tor 0.4.4.6 is the second stable release in the 0.4.4.x series. It
553 backports fixes from later releases, including a fix for TROVE-2020-
554 005, a security issue that could be used, under certain cases, by an
555 adversary to observe traffic patterns on a limited number of circuits
556 intended for a different relay.
558 o Major bugfixes (security, backport from 0.4.5.1-alpha):
559 - When completing a channel, relays now check more thoroughly to
560 make sure that it matches any pending circuits before attaching
561 those circuits. Previously, address correctness and Ed25519
562 identities were not checked in this case, but only when extending
563 circuits on an existing channel. Fixes bug 40080; bugfix on
564 0.2.7.2-alpha. Resolves TROVE-2020-005.
566 o Minor features (directory authorities, backport from 0.4.5.1-alpha):
567 - Authorities now list a different set of protocols as required and
568 recommended. These lists have been chosen so that only truly
569 recommended and/or required protocols are included, and so that
570 clients using 0.2.9 or later will continue to work (even though
571 they are not supported), whereas only relays running 0.3.5 or
572 later will meet the requirements. Closes ticket 40162.
573 - Make it possible to specify multiple ConsensusParams torrc lines.
574 Now directory authority operators can for example put the main
575 ConsensusParams config in one torrc file and then add to it from a
576 different torrc file. Closes ticket 40164.
578 o Minor features (subprotocol versions, backport from 0.4.5.1-alpha):
579 - Tor no longer allows subprotocol versions larger than 63.
580 Previously version numbers up to UINT32_MAX were allowed, which
581 significantly complicated our code. Implements proposal 318;
584 o Minor features (tests, v2 onion services, backport from 0.4.5.1-alpha):
585 - Fix a rendezvous cache unit test that was triggering an underflow
586 on the global rend cache allocation. Fixes bug 40125; bugfix
588 - Fix another rendezvous cache unit test that was triggering an
589 underflow on the global rend cache allocation. Fixes bug 40126;
590 bugfix on 0.2.8.1-alpha.
592 o Minor bugfixes (compilation, backport from 0.4.5.1-alpha):
593 - Fix compiler warnings that would occur when building with
594 "--enable-all-bugs-are-fatal" and "--disable-module-relay" at the
595 same time. Fixes bug 40129; bugfix on 0.4.4.1-alpha.
596 - Resolve a compilation warning that could occur in
597 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
599 o Minor bugfixes (logging, backport from 0.4.5.1-alpha):
600 - Remove a debug logging statement that uselessly spammed the logs.
601 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
603 o Minor bugfixes (relay configuration, crash, backport from 0.4.5.1-alpha):
604 - Avoid a fatal assert() when failing to create a listener
605 connection for an address that was in use. Fixes bug 40073; bugfix
608 o Minor bugfixes (v2 onion services, backport from 0.4.5.1-alpha):
609 - For HSFETCH commands on v2 onion services addresses, check the
610 length of bytes decoded, not the base32 length. Fixes bug 34400;
611 bugfix on 0.4.1.1-alpha. Patch by Neel Chauhan.
614 Changes in version 0.4.3.7 - 2020-11-12
615 Tor 0.4.3.7 backports several bugfixes from later releases. It
616 includes a fix for TROVE-2020-005, a security issue that could be
617 used, under certain cases, by an adversary to observe traffic patterns
618 on a limited number of circuits intended for a different relay.
620 Please be aware that support for the 0.4.3.x series will end on 15
621 February 2021. Please upgrade to 0.4.4.x or 0.4.5.x before then, or
622 downgrade to 0.3.5.x, which will be supported until at least 1
625 o Major features (fallback directory list, backport form 0.4.4.3-alpha):
626 - Replace the 148 fallback directories originally included in Tor
627 0.4.1.4-rc (of which around 105 are still functional) with a list
628 of 144 fallbacks generated in July 2020. Closes ticket 40061.
630 o Major bugfixes (security, backport from 0.4.5.1-alpha):
631 - When completing a channel, relays now check more thoroughly to
632 make sure that it matches any pending circuits before attaching
633 those circuits. Previously, address correctness and Ed25519
634 identities were not checked in this case, but only when extending
635 circuits on an existing channel. Fixes bug 40080; bugfix on
636 0.2.7.2-alpha. Resolves TROVE-2020-005.
638 o Major bugfixes (NSS, backport from 0.4.4.3-alpha):
639 - When running with NSS enabled, make sure that NSS knows to expect
640 nonblocking sockets. Previously, we set our TCP sockets as
641 nonblocking, but did not tell NSS, which in turn could lead to
642 unexpected blocking behavior. Fixes bug 40035; bugfix
645 o Minor features (security, backport from 0.4.4.4-rc):
646 - Channels using obsolete versions of the Tor link protocol are no
647 longer allowed to circumvent address-canonicity checks. (This is
648 only a minor issue, since such channels have no way to set ed25519
649 keys, and therefore should always be rejected for circuits that
650 specify ed25519 identities.) Closes ticket 40081.
652 o Minor features (subprotocol versions, backport from 0.4.5.1-alpha):
653 - Tor no longer allows subprotocol versions larger than 63.
654 Previously version numbers up to UINT32_MAX were allowed, which
655 significantly complicated our code. Implements proposal 318;
658 o Minor features (tests, backport from 0.4.4.5):
659 - Our "make check" target now runs the unit tests in 8 parallel
660 chunks. Doing this speeds up hardened CI builds by more than a
661 factor of two. Closes ticket 40098.
663 o Minor features (tests, v2 onion services, backport from 0.4.5.1-alpha):
664 - Fix a rendezvous cache unit test that was triggering an underflow
665 on the global rend cache allocation. Fixes bug 40125; bugfix
667 - Fix another rendezvous cache unit test that was triggering an
668 underflow on the global rend cache allocation. Fixes bug 40126;
669 bugfix on 0.2.8.1-alpha.
671 o Minor bugfixes (correctness, buffers, backport from 0.4.4.4-rc):
672 - Fix a correctness bug that could cause an assertion failure if we
673 ever tried using the buf_move_all() function with an empty input
674 buffer. As far as we know, no released versions of Tor do this.
675 Fixes bug 40076; bugfix on 0.3.3.1-alpha.
677 o Minor bugfixes (logging, backport from 0.4.5.1-alpha):
678 - Remove a debug logging statement that uselessly spammed the logs.
679 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
681 o Minor bugfixes (rate limiting, bridges, pluggable transports, backport from 0.4.4.4-rc):
682 - On a bridge, treat all connections from an ExtORPort as remote by
683 default for the purposes of rate-limiting. Previously, bridges
684 would treat the connection as local unless they explicitly
685 received a "USERADDR" command. ExtORPort connections still count
686 as local if there is a USERADDR command with an explicit local
687 address. Fixes bug 33747; bugfix on 0.2.5.1-alpha.
689 o Minor bugfixes (relay configuration, crash, backport from 0.4.5.1-alpha):
690 - Avoid a fatal assert() when failing to create a listener
691 connection for an address that was in use. Fixes bug 40073; bugfix
694 o Minor bugfixes (relay, usability, backport from 0.4.4.3-alpha):
695 - Adjust the rules for when to warn about having too many
696 connections to other relays. Previously we'd tolerate up to 1.5
697 connections per relay on average. Now we tolerate more connections
698 for directory authorities, and raise the number of total
699 connections we need to see before we warn. Fixes bug 33880; bugfix
702 o Minor bugfixes (tests, 0.4.4.5):
703 - Fix the behavior of the rend_cache/clean_v2_descs_as_dir when run
704 on its own. Previously, it would exit with an error. Fixes bug
705 40099; bugfix on 0.2.8.1-alpha.
707 o Minor bugfixes (v2 onion services, backport from 0.4.5.1-alpha):
708 - For HSFETCH commands on v2 onion services addresses, check the
709 length of bytes decoded, not the base32 length. Fixes bug 34400;
710 bugfix on 0.4.1.1-alpha. Patch by Neel Chauhan.
712 o Minor bugfixes (windows, backport from 0.4.4.4-rc):
713 - Fix a bug that prevented Tor from starting if its log file grew
714 above 2GB. Fixes bug 31036; bugfix on 0.2.1.8-alpha.
716 o Deprecated features (onion service v2, backport form 0.4.4.2-alpha):
717 - Add a deprecation warning for version 2 onion services. Closes
720 o Removed features (backport from 0.4.4.3-alpha):
721 - Our "check-local" test target no longer tries to use the
722 Coccinelle semantic patching tool parse all the C files. While it
723 is a good idea to try to make sure Coccinelle works on our C
724 before we run a Coccinelle patch, doing so on every test run has
725 proven to be disruptive. You can still run this tool manually with
726 "make check-cocci". Closes ticket 40030. ticket 40030.
729 Changes in version 0.3.5.12 - 2020-11-12
730 Tor 0.4.3.7 backports several bugfixes from later releases. It
731 includes a fix for TROVE-2020-005, a security issue that could be
732 used, under certain cases, by an adversary to observe traffic patterns
733 on a limited number of circuits intended for a different relay.
735 o Major features (fallback directory list, backport form 0.4.4.3-alpha):
736 - Replace the 148 fallback directories originally included in Tor
737 0.4.1.4-rc (of which around 105 are still functional) with a list
738 of 144 fallbacks generated in July 2020. Closes ticket 40061.
740 o Major bugfixes (security, backport from 0.4.5.1-alpha):
741 - When completing a channel, relays now check more thoroughly to
742 make sure that it matches any pending circuits before attaching
743 those circuits. Previously, address correctness and Ed25519
744 identities were not checked in this case, but only when extending
745 circuits on an existing channel. Fixes bug 40080; bugfix on
746 0.2.7.2-alpha. Resolves TROVE-2020-005.
748 o Major bugfixes (NSS, backport from 0.4.4.3-alpha):
749 - When running with NSS enabled, make sure that NSS knows to expect
750 nonblocking sockets. Previously, we set our TCP sockets as
751 nonblocking, but did not tell NSS, which in turn could lead to
752 unexpected blocking behavior. Fixes bug 40035; bugfix
755 o Minor features (security, backport from 0.4.4.4-rc):
756 - Channels using obsolete versions of the Tor link protocol are no
757 longer allowed to circumvent address-canonicity checks. (This is
758 only a minor issue, since such channels have no way to set ed25519
759 keys, and therefore should always be rejected for circuits that
760 specify ed25519 identities.) Closes ticket 40081.
762 o Minor features (debugging, directory system):
763 - Don't crash when we find a non-guard with a guard-fraction value
764 set. Instead, log a bug warning, in an attempt to figure out how
765 this happened. Diagnostic for ticket 32868.
767 o Minor features (subprotocol versions, backport from 0.4.5.1-alpha):
768 - Tor no longer allows subprotocol versions larger than 63.
769 Previously version numbers up to UINT32_MAX were allowed, which
770 significantly complicated our code. Implements proposal 318;
773 o Minor features (tests, backport from 0.4.4.5):
774 - Our "make check" target now runs the unit tests in 8 parallel
775 chunks. Doing this speeds up hardened CI builds by more than a
776 factor of two. Closes ticket 40098.
778 o Minor features (tests, v2 onion services, backport from 0.4.5.1-alpha):
779 - Fix a rendezvous cache unit test that was triggering an underflow
780 on the global rend cache allocation. Fixes bug 40125; bugfix
782 - Fix another rendezvous cache unit test that was triggering an
783 underflow on the global rend cache allocation. Fixes bug 40126;
784 bugfix on 0.2.8.1-alpha.
786 o Minor bugfixes (correctness, buffers, backport from 0.4.4.4-rc):
787 - Fix a correctness bug that could cause an assertion failure if we
788 ever tried using the buf_move_all() function with an empty input
789 buffer. As far as we know, no released versions of Tor do this.
790 Fixes bug 40076; bugfix on 0.3.3.1-alpha.
792 o Minor bugfixes (logging, backport from 0.4.5.1-alpha):
793 - Remove a debug logging statement that uselessly spammed the logs.
794 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
796 o Minor bugfixes (rate limiting, bridges, pluggable transports, backport from 0.4.4.4-rc):
797 - On a bridge, treat all connections from an ExtORPort as remote by
798 default for the purposes of rate-limiting. Previously, bridges
799 would treat the connection as local unless they explicitly
800 received a "USERADDR" command. ExtORPort connections still count
801 as local if there is a USERADDR command with an explicit local
802 address. Fixes bug 33747; bugfix on 0.2.5.1-alpha.
804 o Minor bugfixes (relay configuration, crash, backport from 0.4.5.1-alpha):
805 - Avoid a fatal assert() when failing to create a listener
806 connection for an address that was in use. Fixes bug 40073; bugfix
809 o Minor bugfixes (relay, usability, backport from 0.4.4.3-alpha):
810 - Adjust the rules for when to warn about having too many
811 connections to other relays. Previously we'd tolerate up to 1.5
812 connections per relay on average. Now we tolerate more connections
813 for directory authorities, and raise the number of total
814 connections we need to see before we warn. Fixes bug 33880; bugfix
817 o Minor bugfixes (relays, backport from 0.4.4.1-alpha):
818 - Stop advertising incorrect IPv6 ORPorts in relay and bridge
819 descriptors, when the IPv6 port was configured as "auto". Fixes
820 bug 32588; bugfix on 0.2.3.9-alpha.
822 o Minor bugfixes (tests, 0.4.4.5):
823 - Fix the behavior of the rend_cache/clean_v2_descs_as_dir when run
824 on its own. Previously, it would exit with an error. Fixes bug
825 40099; bugfix on 0.2.8.1-alpha.
827 o Minor bugfixes (windows, backport from 0.4.4.4-rc):
828 - Fix a bug that prevented Tor from starting if its log file grew
829 above 2GB. Fixes bug 31036; bugfix on 0.2.1.8-alpha.
831 o Deprecated features (onion service v2, backport form 0.4.4.2-alpha):
832 - Add a deprecation warning for version 2 onion services. Closes
836 Changes in version 0.4.5.1-alpha - 2020-11-01
837 Tor 0.4.5.1-alpha is the first alpha release in the 0.4.5.x series. It
838 improves support for IPv6, address discovery and self-testing, code
841 This release also fixes TROVE-2020-005, a security issue that could be
842 used, under certain cases, by an adversary to observe traffic patterns
843 on a limited number of circuits intended for a different relay. To
844 mount this attack, the adversary would need to actively extend
845 circuits to an incorrect address, as well as compromise a relay's
846 legacy RSA-1024 key. We'll be backporting this fix to other release
847 series soon, after it has had some testing.
849 Here are the changes since 0.4.4.5.
851 o Major features (build):
852 - When building Tor, first link all object files into a single
853 static library. This may help with embedding Tor in other
854 programs. Note that most Tor functions do not constitute a part of
855 a stable or supported API: only those functions in tor_api.h
856 should be used if embedding Tor. Closes ticket 40127.
858 o Major features (metrics):
859 - Introduce a new MetricsPort which exposes, through an HTTP
860 interface, a series of metrics that tor collects at runtime. At
861 the moment, the only supported output format is Prometheus data
862 model. Closes ticket 40063. See the manual page for more
863 information and security considerations.
864 o Major features (relay, IPv6):
865 - The torrc option Address now supports IPv6. This unifies our
866 address discovery interface to support IPv4, IPv6, and hostnames.
868 - Launch IPv4 and IPv6 ORPort self-test circuits on relays and
869 bridges. Closes ticket 33222.
870 - Relays now automatically bind on IPv6 for their ORPort, unless
871 specified otherwise with the IPv4Only flag. Closes ticket 33246.
872 - When a relay with IPv6 support is told to open a connection to
873 another relay, and the extend cell lists both IPv4 and IPv6
874 addresses, the first relay now picks randomly which address to
875 use. Closes ticket 33220.
876 - Relays now track their IPv6 ORPort reachability separately from
877 the reachability of their IPv4 ORPort. They will not publish a
878 descriptor unless _both_ ports appear to be externally reachable.
881 o Major features (tracing):
882 - Add event-tracing library support for USDT and LTTng-UST, and a
883 few tracepoints in the circuit subsystem. More will come
884 incrementally. This feature is compiled out by default: it needs
885 to be enabled at configure time. See documentation in
886 doc/HACKING/Tracing.md. Closes ticket 32910.
888 o Major bugfixes (security):
889 - When completing a channel, relays now check more thoroughly to
890 make sure that it matches any pending circuits before attaching
891 those circuits. Previously, address correctness and Ed25519
892 identities were not checked in this case, but only when extending
893 circuits on an existing channel. Fixes bug 40080; bugfix on
894 0.2.7.2-alpha. Resolves TROVE-2020-005.
896 o Major bugfixes (TLS, buffer):
897 - When attempting to read N bytes on a TLS connection, really try to
898 read all N bytes. Previously, Tor would stop reading after the
899 first TLS record, which can be smaller than the N bytes requested,
900 and not check for more data until the next mainloop event. Fixes
901 bug 40006; bugfix on 0.1.0.5-rc.
903 o Minor features (address discovery):
904 - If no Address statements are found, relays now prioritize guessing
905 their address by looking at the local interface instead of the
906 local hostname. If the interface address can't be found, the local
907 hostname is used. Closes ticket 33238.
909 o Minor features (admin tools):
910 - Add a new --format argument to -key-expiration option to allow
911 specifying the time format of the expiration date. Adds Unix
912 timestamp format support. Patch by Daniel Pinto. Closes
915 o Minor features (bootstrap reporting):
916 - When reporting bootstrapping status on a relay, do not consider
917 connections that have never been the target of an origin circuit.
918 Previously, all connection failures were treated as potential
919 bootstrapping failures, including connections that had been opened
920 because of client requests. Closes ticket 25061.
922 o Minor features (build):
923 - When running the configure script, try to detect version
924 mismatches between the OpenSSL headers and libraries, and suggest
925 that the user should try "--with-openssl-dir". Closes 40138.
926 - If the configure script has given any warnings, remind the user
927 about them at the end of the script. Related to 40138.
929 o Minor features (configuration):
930 - Allow using wildcards (* and ?) with the %include option on
931 configuration files. Closes ticket 25140. Patch by Daniel Pinto.
932 - Allow the configuration options EntryNodes, ExcludeNodes,
933 ExcludeExitNodes, ExitNodes, MiddleNodes, HSLayer2Nodes and
934 HSLayer3Nodes to be specified multiple times. Closes ticket 28361.
935 Patch by Daniel Pinto.
937 o Minor features (control port):
938 - Add a DROPTIMEOUTS command to drop circuit build timeout history
939 and reset the current timeout. Closes ticket 40002.
940 - When a stream enters the AP_CONN_STATE_CONTROLLER_WAIT status,
941 send a control port event. Closes ticket 32190. Patch by
943 - Introduce GETINFO "stats/ntor/{assigned/requested}" and
944 "stats/tap/{assigned/requested}" to get the NTor and TAP circuit
945 onion handshake counts respectively. Closes ticket 28279. Patch by
948 o Minor features (control port, IPv6):
949 - Tor relays now try to report to the controller when they are
950 launching an IPv6 self-test. Closes ticket 34068.
951 - Introduce "GETINFO address/v4" and "GETINFO address/v6" in the
952 control port to fetch the Tor host's respective IPv4 or IPv6
953 address. We keep "GETINFO address" for backwards-compatibility.
954 Closes ticket 40039. Patch by Neel Chauhan.
956 o Minor features (directory authorities):
957 - Authorities now list a different set of protocols as required and
958 recommended. These lists have been chosen so that only truly
959 recommended and/or required protocols are included, and so that
960 clients using 0.2.9 or later will continue to work (even though
961 they are not supported), whereas only relays running 0.3.5 or
962 later will meet the requirements. Closes ticket 40162.
963 - Add a new consensus method 30 that removes the unnecessary "="
964 padding from ntor-onion-key. Closes ticket 7869. Patch by
966 - Directory authorities now reject descriptors from relays running
967 Tor versions from the obsolete 0.4.1 series. Resolves ticket
968 34357. Patch by Neel Chauhan.
969 - Make it possible to specify multiple ConsensusParams torrc lines.
970 Now directory authority operators can for example put the main
971 ConsensusParams config in one torrc file and then add to it from a
972 different torrc file. Closes ticket 40164.
973 - The AssumeReachable option no longer stops directory authorities
974 from checking whether other relays are running. A new
975 AuthDirTestReachability option can be used to disable these
976 checks. Closes ticket 34445.
977 - When looking for possible Sybil attacks, also consider IPv6
978 addresses. Two routers are considered to have "the same" address
979 by this metric if they are in the same /64 network. Patch from
980 Maurice Pibouin. Closes ticket 7193.
982 o Minor features (directory authorities, IPv6):
983 - Make authorities add their IPv6 ORPort (if any) to the trusted
984 servers list. Authorities previously added only their IPv4
985 addresses. Closes ticket 32822.
987 o Minor features (ed25519, relay):
988 - Save a relay's base64-encoded ed25519 identity key to the data
989 directory in a file named fingerprint-ed25519. Closes ticket
990 30642. Patch by Neel Chauhan.
992 o Minor features (heartbeat):
993 - Include the total number of inbound and outbound IPv4 and IPv6
994 connections in the heartbeat message. Closes ticket 29113.
996 o Minor features (IPv6, ExcludeNodes):
997 - Handle IPv6 addresses in ExcludeNodes; previously they were
998 ignored. Closes ticket 34065. Patch by Neel Chauhan.
1000 o Minor features (logging):
1001 - Add the running glibc version to the log, and the compiled glibc
1002 version to the library list returned when using --library-versions.
1003 Patch from Daniel Pinto. Closes ticket 40047.
1004 - Consider an HTTP 301 response to be an error (like a 404) when
1005 processing a directory response. Closes ticket 40053.
1006 - Log directory fetch statistics as a single line. Closes
1008 - Provide more complete descriptions of our connections when logging
1009 about them. Closes ticket 40041.
1010 - When describing a relay in the logs, we now include its ed25519
1011 identity. Closes ticket 22668.
1013 o Minor features (onion services):
1014 - Only overwrite an onion service's existing hostname file if its
1015 contents are wrong. This enables read-only onion-service
1016 directories. Resolves ticket 40062. Patch by Neel Chauhan.
1018 o Minor features (pluggable transports):
1019 - Add an OutboundBindAddressPT option to allow users to specify
1020 which IPv4 and IPv6 address pluggable transports should use for
1021 outgoing IP packets. Tor does not have a way to enforce that the
1022 pluggable transport honors this option, so each pluggable transport
1023 needs to implement support on its own. Closes ticket 5304.
1025 o Minor features (relay address tracking):
1026 - We now store relay addresses for OR connections in a more logical
1027 way. Previously we would sometimes overwrite the actual address of
1028 a connection with a "canonical address", and then store the "real
1029 address" elsewhere to remember it. We now track the "canonical
1030 address" elsewhere for the cases where we need it, and leave the
1031 connection's address alone. Closes ticket 33898.
1033 o Minor features (relay):
1034 - If a relay is unable to discover its address, attempt to learn it
1035 from the NETINFO cell. Closes ticket 40022.
1036 - Log immediately when launching a relay self-check. Previously we
1037 would try to log before launching checks, or approximately when we
1038 intended to launch checks, but this tended to be error-prone.
1039 Closes ticket 34137.
1041 o Minor features (relay, address discovery):
1042 - If Address option is not found in torrc, attempt to learn our
1043 address with the configured ORPort address if any. Closes
1046 o Minor features (relay, IPv6):
1047 - Add an AssumeReachableIPv6 option to disable self-checking IPv6
1048 reachability. Closes part of ticket 33224.
1049 - Add new "assume-reachable" and "assume-reachable-ipv6" consensus
1050 parameters to be used in an emergency to tell relays that they
1051 should publish even if they cannot complete their ORPort self-
1052 checks. Closes ticket 34064 and part of 33224.
1053 - Allow relays to send IPv6-only extend cells. Closes ticket 33222.
1054 - Declare support for the Relay=3 subprotocol version. Closes
1056 - When launching IPv6 ORPort self-test circuits, make sure that the
1057 second-last hop can initiate an IPv6 extend. Closes ticket 33222.
1059 o Minor features (specification update):
1060 - Several fields in microdescriptors, router descriptors, and
1061 consensus documents that were formerly optional are now required.
1062 Implements proposal 315; closes ticket 40132.
1064 o Minor features (state management):
1065 - When loading the state file, remove entries from the statefile
1066 that have been obsolete for a long time. Ordinarily Tor preserves
1067 unrecognized entries in order to keep forward-compatibility, but
1068 these entries have not actually been used in any release since
1069 before 0.3.5.x. Closes ticket 40137.
1071 o Minor features (statistics, ipv6):
1072 - Relays now publish IPv6-specific counts of single-direction versus
1073 bidirectional relay connections. Closes ticket 33264.
1074 - Relays now publish their IPv6 read and write statistics over time,
1075 if statistics are enabled. Closes ticket 33263.
1077 o Minor features (subprotocol versions):
1078 - Tor no longer allows subprotocol versions larger than 63.
1079 Previously version numbers up to UINT32_MAX were allowed, which
1080 significantly complicated our code. Implements proposal 318;
1081 closes ticket 40133.
1082 - Use the new limitations on subprotocol versions due to proposal
1083 318 to simplify our implementation. Part of ticket 40133.
1085 o Minor features (testing configuration):
1086 - The TestingTorNetwork option no longer implicitly sets
1087 AssumeReachable to 1. This change allows us to test relays' self-
1088 testing mechanisms, and to test authorities' relay-testing
1089 functionality. Closes ticket 34446.
1091 o Minor features (testing):
1092 - Added unit tests for channel_matches_target_addr_for_extend().
1093 Closes Ticket 33919. Patch by MrSquanchee.
1095 o Minor features (tests, v2 onion services):
1096 - Fix a rendezvous cache unit test that was triggering an underflow
1097 on the global rend cache allocation. Fixes bug 40125; bugfix
1099 - Fix another rendezvous cache unit test that was triggering an
1100 underflow on the global rend cache allocation. Fixes bug 40126;
1101 bugfix on 0.2.8.1-alpha.
1103 o Minor bugfixes (circuit padding):
1104 - When circpad_send_padding_cell_for_callback is called,
1105 `is_padding_timer_scheduled` flag was not reset. Now it is set to
1106 0 at the top of that function. Fixes bug 32671; bugfix
1108 - Add a per-circuit padding machine instance counter, so we can
1109 differentiate between shutdown requests for old machines on a
1110 circuit. Fixes bug 30992; bugfix on 0.4.1.1-alpha.
1111 - Add the ability to keep circuit padding machines if they match a
1112 set of circuit states or purposes. This allows us to have machines
1113 that start up under some conditions but don't shut down under
1114 others. We now use this mask to avoid starting up introduction
1115 circuit padding again after the machines have already completed.
1116 Fixes bug 32040; bugfix on 0.4.1.1-alpha.
1118 o Minor bugfixes (compatibility):
1119 - Strip '\r' characters when reading text files on Unix platforms.
1120 This should resolve an issue where a relay operator migrates a
1121 relay from Windows to Unix, but does not change the line ending of
1122 Tor's various state files to match the platform, and the CRLF line
1123 endings from Windows end up leaking into other files such as the
1124 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
1126 o Minor bugfixes (compilation):
1127 - Fix compiler warnings that would occur when building with
1128 "--enable-all-bugs-are-fatal" and "--disable-module-relay" at the
1129 same time. Fixes bug 40129; bugfix on 0.4.4.1-alpha.
1130 - Resolve a compilation warning that could occur in
1131 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
1133 o Minor bugfixes (configuration):
1134 - Fix bug where %including a pattern ending with */ would include
1135 files and folders (instead of folders only) in versions of glibc <
1136 2.19. Fixes bug 40141; bugfix on 0.4.5.0-alpha-dev. Patch by
1139 o Minor bugfixes (control port):
1140 - Make sure we send the SOCKS request address in relay begin cells
1141 when a stream is attached with the purpose
1142 CIRCUIT_PURPOSE_CONTROLLER. Fixes bug 33124; bugfix on 0.0.5.
1143 Patch by Neel Chauhan.
1145 o Minor bugfixes (logging):
1146 - Remove a debug logging statement that uselessly spammed the logs.
1147 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
1148 - When logging a rate-limited message about how many messages have
1149 been suppressed in the last N seconds, give an accurate value for
1150 N, rounded up to the nearest minute. Previously we would report
1151 the size of the rate-limiting interval, regardless of when the
1152 messages started to occur. Fixes bug 19431; bugfix
1155 o Minor bugfixes (relay configuration, crash):
1156 - Avoid a fatal assert() when failing to create a listener
1157 connection for an address that was in use. Fixes bug 40073; bugfix
1160 o Minor bugfixes (rust, protocol versions):
1161 - Declare support for the onion service introduction point denial of
1162 service extensions when building with Rust. Fixes bug 34248;
1163 bugfix on 0.4.2.1-alpha.
1164 - Make Rust protocol version support checks consistent with the
1165 undocumented error behavior of the corresponding C code. Fixes bug
1166 34251; bugfix on 0.3.3.5-rc.
1168 o Minor bugfixes (self-testing):
1169 - When receiving an incoming circuit, only accept it as evidence
1170 that we are reachable if the declared address of its channel is
1171 the same address we think that we have. Otherwise, it could be
1172 evidence that we're reachable on some other address. Fixes bug
1173 20165; bugfix on 0.1.0.1-rc.
1175 o Minor bugfixes (spec conformance):
1176 - Use the correct key type when generating signing->link
1177 certificates. Fixes bug 40124; bugfix on 0.2.7.2-alpha.
1179 o Minor bugfixes (subprotocol versions):
1180 - Consistently reject extra commas, instead of only rejecting
1181 leading commas. Fixes bug 27194; bugfix on 0.2.9.4-alpha.
1182 - In summarize_protover_flags(), treat empty strings the same as
1183 NULL. This prevents protocols_known from being set. Previously, we
1184 treated empty strings as normal strings, which led to
1185 protocols_known being set. Fixes bug 34232; bugfix on
1186 0.3.3.2-alpha. Patch by Neel Chauhan.
1188 o Minor bugfixes (v2 onion services):
1189 - For HSFETCH commands on v2 onion services addresses, check the
1190 length of bytes decoded, not the base32 length. Fixes bug 34400;
1191 bugfix on 0.4.1.1-alpha. Patch by Neel Chauhan.
1193 o Code simplification and refactoring:
1194 - Add and use a set of functions to perform down-casts on constant
1195 connection and channel pointers. Closes ticket 40046.
1196 - Refactor our code that logs descriptions of connections, channels,
1197 and the peers on them, to use a single call path. This change
1198 enables us to refactor the data types that they use, and eliminates
1199 many confusing usages of those types. Closes ticket 40041.
1200 - Refactor some common node selection code into a single function.
1201 Closes ticket 34200.
1202 - Remove the now-redundant 'outbuf_flushlen' field from our
1203 connection type. It was previously used for an older version of
1204 our rate-limiting logic. Closes ticket 33097.
1205 - Rename "fascist_firewall_*" identifiers to "reachable_addr_*"
1206 instead, for consistency with other code. Closes ticket 18106.
1207 - Rename functions about "advertised" ports which are not in fact
1208 guaranteed to return the ports that have been advertised. Closes
1210 - Split implementation of several command line options from
1211 options_init_from_torrc into smaller isolated functions. Patch by
1212 Daniel Pinto. Closes ticket 40102.
1213 - When an extend cell is missing an IPv4 or IPv6 address, fill in
1214 the address from the extend info. This is similar to what was done
1215 in ticket 33633 for ed25519 keys. Closes ticket 33816. Patch by
1218 o Deprecated features:
1219 - The "non-builtin" argument to the "--dump-config" command is now
1220 deprecated. When it works, it behaves the same as "short", which
1221 you should use instead. Closes ticket 33398.
1224 - Replace URLs from our old bugtracker so that they refer to the new
1225 bugtracker and wiki. Closes ticket 40101.
1228 - We no longer ship or build a "tor.service" file for use with
1229 systemd. No distribution included this script unmodified, and we
1230 don't have the expertise ourselves to maintain this in a way that
1231 all the various systemd-based distributions can use. Closes
1233 - We no longer ship support for the Android logging API. Modern
1234 versions of Android can use the syslog API instead. Closes
1236 - The "optimistic data" feature is now always on; there is no longer
1237 an option to disable it from the torrc file or from the consensus
1238 directory. Closes part of 40139.
1239 - The "usecreatefast" network parameter is now removed; there is no
1240 longer an option for authorities to turn it off. Closes part
1244 - Add unit tests for bandwidth statistics manipulation functions.
1245 Closes ticket 33812. Patch by MrSquanchee.
1247 o Code simplification and refactoring (autoconf):
1248 - Remove autoconf checks for unused funcs and headers. Closes ticket
1249 31699; Patch by @bduszel
1251 o Code simplification and refactoring (maintainer scripts):
1252 - Disable by default the pre-commit hook. Use the environment
1253 variable TOR_EXTRA_PRE_COMMIT_CHECKS in order to run it.
1254 Furthermore, stop running practracker in the pre-commit hook and
1255 make check-local. Closes ticket 40019.
1257 o Code simplification and refactoring (relay address):
1258 - Most of IPv4 representation was using "uint32_t". It has now been
1259 moved to use the internal "tor_addr_t" interface instead. This is
1260 so we can properly integrate IPv6 along IPv4 with common
1261 interfaces. Closes ticket 40043.
1263 o Documentation (manual page):
1264 - Move them from doc/ to doc/man/. Closes ticket 40044.
1265 - Describe the status of the "Sandbox" option more accurately. It is
1266 no longer "experimental", but it _is_ dependent on kernel and libc
1267 versions. Closes ticket 23378.
1269 o Documentation (tracing):
1270 - Document in depth the circuit subsystem trace events in the new
1271 doc/tracing/EventsCircuit.md. Closes ticket 40036.
1274 Changes in version 0.4.4.5 - 2020-09-15
1275 Tor 0.4.4.5 is the first stable release in the 0.4.4.x series. This
1276 series improves our guard selection algorithms, adds v3 onion balance
1277 support, improves the amount of code that can be disabled when running
1278 without relay support, and includes numerous small bugfixes and
1279 enhancements. It also lays the ground for some IPv6 features that
1280 we'll be developing more in the next (0.4.5) series.
1282 Per our support policy, we support each stable release series for nine
1283 months after its first stable release, or three months after the first
1284 stable release of the next series: whichever is longer. This means
1285 that 0.4.4.x will be supported until around June 2021--or later, if
1286 0.4.5.x is later than anticipated.
1288 Note also that support for 0.4.2.x has just ended; support for 0.4.3
1289 will continue until Feb 15, 2021. We still plan to continue supporting
1290 0.3.5.x, our long-term stable series, until Feb 2022.
1292 Below are the changes since 0.4.4.4-rc. For a complete list of changes
1293 since 0.4.3.6, see the ReleaseNotes file.
1295 o Major bugfixes (onion services, DoS):
1296 - Correct handling of parameters for the onion service DoS defense.
1297 Previously, the consensus parameters for the onion service DoS
1298 defenses were overwriting the parameters set by the service
1299 operator using HiddenServiceEnableIntroDoSDefense. Fixes bug
1300 40109; bugfix on 0.4.2.1-alpha.
1302 o Major bugfixes (stats, onion services):
1303 - Fix a bug where we were undercounting the Tor network's total
1304 onion service traffic, by ignoring any traffic originating from
1305 clients. Now we count traffic from both clients and services.
1306 Fixes bug 40117; bugfix on 0.2.6.2-alpha.
1308 o Minor features (control port):
1309 - If a ClientName was specified in ONION_CLIENT_AUTH_ADD for an
1310 onion service, display it when we use ONION_CLIENT_AUTH_VIEW.
1311 Closes ticket 40089. Patch by Neel Chauhan.
1313 o Minor features (denial-of-service memory limiter):
1314 - Allow the user to configure even lower values for the
1315 MaxMemInQueues parameter. Relays now enforce a minimum of 64 MB,
1316 when previously the minimum was 256 MB. On clients, there is no
1317 minimum. Relays and clients will both warn if the value is set so
1318 low that Tor is likely to stop working. Closes ticket 24308.
1320 o Minor features (tests):
1321 - Our "make check" target now runs the unit tests in 8 parallel
1322 chunks. Doing this speeds up hardened CI builds by more than a
1323 factor of two. Closes ticket 40098.
1325 o Minor bugfixes (guard selection algorithm):
1326 - Avoid needless guard-related warning when upgrading from 0.4.3 to
1327 0.4.4. Fixes bug 40105; bugfix on 0.4.4.1-alpha.
1329 o Minor bugfixes (tests):
1330 - Fix the behavior of the rend_cache/clean_v2_descs_as_dir when run
1331 on its own. Previously, it would exit with an error. Fixes bug
1332 40099; bugfix on 0.2.8.1-alpha.
1335 Changes in version 0.4.4.3-alpha - 2020-07-27
1336 Tor 0.4.4.3-alpha fixes several annoyances in previous versions,
1337 including one affecting NSS users, and several affecting the Linux
1340 o Major features (fallback directory list):
1341 - Replace the 148 fallback directories originally included in Tor
1342 0.4.1.4-rc (of which around 105 are still functional) with a list
1343 of 144 fallbacks generated in July 2020. Closes ticket 40061.
1345 o Major bugfixes (NSS):
1346 - When running with NSS enabled, make sure that NSS knows to expect
1347 nonblocking sockets. Previously, we set our TCP sockets as
1348 nonblocking, but did not tell NSS, which in turn could lead to
1349 unexpected blocking behavior. Fixes bug 40035; bugfix
1352 o Minor bugfixes (linux seccomp2 sandbox):
1353 - Fix a regression on sandboxing rules for the openat() syscall. The
1354 fix for bug 25440 fixed the problem on systems with glibc >= 2.27
1355 but broke with versions of glibc. We now choose a rule based on
1356 the glibc version. Patch from Daniel Pinto. Fixes bug 27315;
1358 - Makes the seccomp sandbox allow the correct syscall for opendir
1359 according to the running glibc version. This fixes crashes when
1360 reloading torrc with sandbox enabled when running on glibc 2.15 to
1361 2.21 and 2.26. Patch from Daniel Pinto. Fixes bug 40020; bugfix
1364 o Minor bugfixes (relay, usability):
1365 - Adjust the rules for when to warn about having too many
1366 connections to other relays. Previously we'd tolerate up to 1.5
1367 connections per relay on average. Now we tolerate more connections
1368 for directory authorities, and raise the number of total
1369 connections we need to see before we warn. Fixes bug 33880; bugfix
1373 - Replace most http:// URLs in our code and documentation with
1374 https:// URLs. (We have left unchanged the code in src/ext/, and
1375 the text in LICENSE.) Closes ticket 31812. Patch from Jeremy Rand.
1378 - Our "check-local" test target no longer tries to use the
1379 Coccinelle semantic patching tool parse all the C files. While it
1380 is a good idea to try to make sure Coccinelle works on our C
1381 before we run a Coccinelle patch, doing so on every test run has
1382 proven to be disruptive. You can still run this tool manually with
1383 "make check-cocci". Closes ticket 40030.
1386 Changes in version 0.3.5.11 - 2020-07-09
1387 Tor 0.3.5.11 backports fixes from later tor releases, including several
1388 usability, portability, and reliability fixes.
1390 This release also fixes TROVE-2020-001, a medium-severity denial of
1391 service vulnerability affecting all versions of Tor when compiled with
1392 the NSS encryption library. (This is not the default configuration.)
1393 Using this vulnerability, an attacker could cause an affected Tor
1394 instance to crash remotely. This issue is also tracked as CVE-2020-
1395 15572. Anybody running a version of Tor built with the NSS library
1396 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
1399 o Major bugfixes (NSS, security, backport from 0.4.4.2-alpha):
1400 - Fix a crash due to an out-of-bound memory access when Tor is
1401 compiled with NSS support. Fixes bug 33119; bugfix on
1402 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
1405 o Major bugfixes (DoS defenses, bridges, pluggable transport, backport from 0.4.3.4-rc):
1406 - Fix a bug that was preventing DoS defenses from running on bridges
1407 with a pluggable transport. Previously, the DoS subsystem was not
1408 given the transport name of the client connection, thus failed to
1409 find the GeoIP cache entry for that client address. Fixes bug
1410 33491; bugfix on 0.3.3.2-alpha.
1412 o Minor features (testing, backport from 0.4.3.4-rc):
1413 - The unit tests now support a "TOR_SKIP_TESTCASES" environment
1414 variable to specify a list of space-separated test cases that
1415 should not be executed. We will use this to disable certain tests
1416 that are failing on Appveyor because of mismatched OpenSSL
1417 libraries. Part of ticket 33643.
1419 o Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha):
1420 - Use the correct 64-bit printf format when compiling with MINGW on
1421 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
1423 o Minor bugfix (relay, configuration, backport from 0.4.3.3-alpha):
1424 - Warn if the ContactInfo field is not set, and tell the relay
1425 operator that not having a ContactInfo field set might cause their
1426 relay to get rejected in the future. Fixes bug 33361; bugfix
1429 o Minor bugfixes (client performance, backport from 0.4.4.1-alpha):
1430 - Resume use of preemptively-built circuits when UseEntryGuards is set
1431 to 0. We accidentally disabled this feature with that config
1432 setting, leading to slower load times. Fixes bug 34303; bugfix
1435 o Minor bugfixes (compiler compatibility, backport from 0.4.3.5):
1436 - Avoid compiler warnings from Clang 10 related to the use of GCC-
1437 style "/* falls through */" comments. Both Clang and GCC allow
1438 __attribute__((fallthrough)) instead, so that's what we're using
1439 now. Fixes bug 34078; bugfix on 0.3.1.3-alpha.
1441 o Minor bugfixes (compiler warnings, backport from 0.4.4.2-alpha):
1442 - Fix a compiler warning on platforms with 32-bit time_t values.
1443 Fixes bug 40028; bugfix on 0.3.2.8-rc.
1445 o Minor bugfixes (embedded Tor, backport from 0.4.3.1-alpha):
1446 - When starting Tor any time after the first time in a process,
1447 register the thread in which it is running as the main thread.
1448 Previously, we only did this on Windows, which could lead to bugs
1449 like 23081 on non-Windows platforms. Fixes bug 32884; bugfix
1452 o Minor bugfixes (key portability, backport from 0.4.3.4-rc):
1453 - When reading PEM-encoded key data, tolerate CRLF line-endings even
1454 if we are not running on Windows. Previously, non-Windows hosts
1455 would reject these line-endings in certain positions, making
1456 certain key files hard to move from one host to another. Fixes bug
1457 33032; bugfix on 0.3.5.1-alpha.
1459 o Minor bugfixes (logging, backport from 0.4.4.2-alpha):
1460 - Downgrade a noisy log message that could occur naturally when
1461 receiving an extrainfo document that we no longer want. Fixes bug
1462 16016; bugfix on 0.2.6.3-alpha.
1464 o Minor bugfixes (onion service v3, client, backport from 0.4.3.3-alpha):
1465 - Remove a BUG() warning that would cause a stack trace if an onion
1466 service descriptor was freed while we were waiting for a
1467 rendezvous circuit to complete. Fixes bug 28992; bugfix
1470 o Testing (CI, backport from 0.4.3.4-rc):
1471 - In our Appveyor Windows CI, copy required DLLs to test and app
1472 directories, before running tor's tests. This ensures that tor.exe
1473 and test*.exe use the correct version of each DLL. This fix is not
1474 required, but we hope it will avoid DLL search issues in future.
1475 Fixes bug 33673; bugfix on 0.3.4.2-alpha.
1476 - On Appveyor, skip the crypto/openssl_version test, which is
1477 failing because of a mismatched library installation. Fix
1481 Changes in version 0.4.2.8 - 2020-07-09
1482 Tor 0.4.2.8 backports various fixes from later releases, including
1483 several that affect usability and portability.
1485 This release also fixes TROVE-2020-001, a medium-severity denial of
1486 service vulnerability affecting all versions of Tor when compiled with
1487 the NSS encryption library. (This is not the default configuration.)
1488 Using this vulnerability, an attacker could cause an affected Tor
1489 instance to crash remotely. This issue is also tracked as CVE-2020-
1490 15572. Anybody running a version of Tor built with the NSS library
1491 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
1494 o Major bugfixes (NSS, security, backport from 0.4.4.2-alpha):
1495 - Fix a crash due to an out-of-bound memory access when Tor is
1496 compiled with NSS support. Fixes bug 33119; bugfix on
1497 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
1500 o Major bugfixes (DoS defenses, bridges, pluggable transport, backport from 0.4.3.4-rc):
1501 - Fix a bug that was preventing DoS defenses from running on bridges
1502 with a pluggable transport. Previously, the DoS subsystem was not
1503 given the transport name of the client connection, thus failed to
1504 find the GeoIP cache entry for that client address. Fixes bug
1505 33491; bugfix on 0.3.3.2-alpha.
1507 o Minor feature (sendme, flow control, backport form 0.4.3.4-rc):
1508 - Default to sending SENDME version 1 cells. (Clients are already
1509 sending these, because of a consensus parameter telling them to do
1510 so: this change only affects what clients would do if the
1511 consensus didn't contain a recommendation.) Closes ticket 33623.
1513 o Minor features (diagnostic, backport from 0.4.3.3-alpha):
1514 - Improve assertions and add some memory-poisoning code to try to
1515 track down possible causes of a rare crash (32564) in the EWMA
1516 code. Closes ticket 33290.
1518 o Minor features (testing, backport from 0.4.3.4-rc):
1519 - The unit tests now support a "TOR_SKIP_TESTCASES" environment
1520 variable to specify a list of space-separated test cases that
1521 should not be executed. We will use this to disable certain tests
1522 that are failing on Appveyor because of mismatched OpenSSL
1523 libraries. Part of ticket 33643.
1525 o Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha):
1526 - Use the correct 64-bit printf format when compiling with MINGW on
1527 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
1529 o Minor bugfix (relay, configuration, backport from 0.4.3.3-alpha):
1530 - Warn if the ContactInfo field is not set, and tell the relay
1531 operator that not having a ContactInfo field set might cause their
1532 relay to get rejected in the future. Fixes bug 33361; bugfix
1535 o Minor bugfixes (client performance, backport from 0.4.4.1-alpha):
1536 - Resume use of preemptively-built circuits when UseEntryGuards is set
1537 to 0. We accidentally disabled this feature with that config
1538 setting, leading to slower load times. Fixes bug 34303; bugfix
1541 o Minor bugfixes (compiler compatibility, backport from 0.4.3.5):
1542 - Avoid compiler warnings from Clang 10 related to the use of GCC-
1543 style "/* falls through */" comments. Both Clang and GCC allow
1544 __attribute__((fallthrough)) instead, so that's what we're using
1545 now. Fixes bug 34078; bugfix on 0.3.1.3-alpha.
1546 - Fix compilation warnings with GCC 10.0.1. Fixes bug 34077; bugfix
1549 o Minor bugfixes (compiler warnings, backport from 0.4.4.2-alpha):
1550 - Fix a compiler warning on platforms with 32-bit time_t values.
1551 Fixes bug 40028; bugfix on 0.3.2.8-rc.
1553 o Minor bugfixes (controller protocol, backport from 0.4.3.2-alpha):
1554 - When receiving "ACTIVE" or "DORMANT" signals on the control port,
1555 report them as SIGNAL events. Previously we would log a bug
1556 warning. Fixes bug 33104; bugfix on 0.4.0.1-alpha.
1558 o Minor bugfixes (embedded Tor, backport from 0.4.3.1-alpha):
1559 - When starting Tor any time after the first time in a process,
1560 register the thread in which it is running as the main thread.
1561 Previously, we only did this on Windows, which could lead to bugs
1562 like 23081 on non-Windows platforms. Fixes bug 32884; bugfix
1565 o Minor bugfixes (key portability, backport from 0.4.3.4-rc):
1566 - When reading PEM-encoded key data, tolerate CRLF line-endings even
1567 if we are not running on Windows. Previously, non-Windows hosts
1568 would reject these line-endings in certain positions, making
1569 certain key files hard to move from one host to another. Fixes bug
1570 33032; bugfix on 0.3.5.1-alpha.
1572 o Minor bugfixes (logging, backport from 0.4.3.2-rc):
1573 - When logging a bug, do not say "Future instances of this warning
1574 will be silenced" unless we are actually going to silence them.
1575 Previously we would say this whenever a BUG() check failed in the
1576 code. Fixes bug 33095; bugfix on 0.4.1.1-alpha.
1578 o Minor bugfixes (logging, backport from 0.4.3.4-rc):
1579 - Flush stderr, stdout, and file logs during shutdown, if supported
1580 by the OS. This change helps make sure that any final logs are
1581 recorded. Fixes bug 33087; bugfix on 0.4.1.6.
1583 o Minor bugfixes (logging, backport from 0.4.4.2-alpha):
1584 - Downgrade a noisy log message that could occur naturally when
1585 receiving an extrainfo document that we no longer want. Fixes bug
1586 16016; bugfix on 0.2.6.3-alpha.
1588 o Minor bugfixes (onion service v3, client, backport from 0.4.3.3-alpha):
1589 - Remove a BUG() warning that would cause a stack trace if an onion
1590 service descriptor was freed while we were waiting for a
1591 rendezvous circuit to complete. Fixes bug 28992; bugfix
1594 o Testing (CI, backport from 0.4.3.4-rc):
1595 - In our Appveyor Windows CI, copy required DLLs to test and app
1596 directories, before running tor's tests. This ensures that tor.exe
1597 and test*.exe use the correct version of each DLL. This fix is not
1598 required, but we hope it will avoid DLL search issues in future.
1599 Fixes bug 33673; bugfix on 0.3.4.2-alpha.
1600 - On Appveyor, skip the crypto/openssl_version test, which is
1601 failing because of a mismatched library installation. Fix
1605 Changes in version 0.4.3.6 - 2020-07-09
1606 Tor 0.4.3.6 backports several bugfixes from later releases, including
1607 some affecting usability.
1609 This release also fixes TROVE-2020-001, a medium-severity denial of
1610 service vulnerability affecting all versions of Tor when compiled with
1611 the NSS encryption library. (This is not the default configuration.)
1612 Using this vulnerability, an attacker could cause an affected Tor
1613 instance to crash remotely. This issue is also tracked as CVE-2020-
1614 15572. Anybody running a version of Tor built with the NSS library
1615 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
1618 o Major bugfixes (NSS, security, backport from 0.4.4.2-alpha):
1619 - Fix a crash due to an out-of-bound memory access when Tor is
1620 compiled with NSS support. Fixes bug 33119; bugfix on
1621 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
1624 o Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha):
1625 - Use the correct 64-bit printf format when compiling with MINGW on
1626 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
1628 o Minor bugfixes (client performance, backport from 0.4.4.1-alpha):
1629 - Resume use of preemptively-built circuits when UseEntryGuards is set
1630 to 0. We accidentally disabled this feature with that config
1631 setting, leading to slower load times. Fixes bug 34303; bugfix
1634 o Minor bugfixes (compiler warnings, backport from 0.4.4.2-alpha):
1635 - Fix a compiler warning on platforms with 32-bit time_t values.
1636 Fixes bug 40028; bugfix on 0.3.2.8-rc.
1638 o Minor bugfixes (linux seccomp sandbox, nss, backport from 0.4.4.1-alpha):
1639 - Fix a startup crash when tor is compiled with --enable-nss and
1640 sandbox support is enabled. Fixes bug 34130; bugfix on
1641 0.3.5.1-alpha. Patch by Daniel Pinto.
1643 o Minor bugfixes (logging, backport from 0.4.4.2-alpha):
1644 - Downgrade a noisy log message that could occur naturally when
1645 receiving an extrainfo document that we no longer want. Fixes bug
1646 16016; bugfix on 0.2.6.3-alpha.
1648 o Minor bugfixes (manual page, backport from 0.4.4.1-alpha):
1649 - Update the man page to reflect that MinUptimeHidServDirectoryV2
1650 defaults to 96 hours. Fixes bug 34299; bugfix on 0.2.6.3-alpha.
1652 o Minor bugfixes (onion service v3, backport from 0.4.4.1-alpha):
1653 - Prevent an assert() that would occur when cleaning the client
1654 descriptor cache, and attempting to close circuits for a non-
1655 decrypted descriptor (lacking client authorization). Fixes bug
1656 33458; bugfix on 0.4.2.1-alpha.
1658 o Minor bugfixes (portability, backport from 0.4.4.1-alpha):
1659 - Fix a portability error in the configure script, where we were
1660 using "==" instead of "=". Fixes bug 34233; bugfix on 0.4.3.5.
1662 o Minor bugfixes (relays, backport from 0.4.4.1-alpha):
1663 - Stop advertising incorrect IPv6 ORPorts in relay and bridge
1664 descriptors, when the IPv6 port was configured as "auto". Fixes
1665 bug 32588; bugfix on 0.2.3.9-alpha.
1667 o Documentation (backport from 0.4.4.1-alpha):
1668 - Fix several doxygen warnings related to imbalanced groups. Closes
1672 Changes in version 0.4.4.2-alpha - 2020-07-09
1673 This is the second alpha release in the 0.4.4.x series. It fixes a few
1674 bugs in the previous release, and solves a few usability,
1675 compatibility, and portability issues.
1677 This release also fixes TROVE-2020-001, a medium-severity denial of
1678 service vulnerability affecting all versions of Tor when compiled with
1679 the NSS encryption library. (This is not the default configuration.)
1680 Using this vulnerability, an attacker could cause an affected Tor
1681 instance to crash remotely. This issue is also tracked as CVE-2020-
1682 15572. Anybody running a version of Tor built with the NSS library
1683 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
1686 o Major bugfixes (NSS, security):
1687 - Fix a crash due to an out-of-bound memory access when Tor is
1688 compiled with NSS support. Fixes bug 33119; bugfix on
1689 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
1692 o Minor features (bootstrap reporting):
1693 - Report more detailed reasons for bootstrap failure when the
1694 failure happens due to a TLS error. Previously we would just call
1695 these errors "MISC" when they happened during read, and "DONE"
1696 when they happened during any other TLS operation. Closes
1699 o Minor features (directory authority):
1700 - Authorities now recommend the protocol versions that are supported
1701 by Tor 0.3.5 and later. (Earlier versions of Tor have been
1702 deprecated since January of this year.) This recommendation will
1703 cause older clients and relays to give a warning on startup, or
1704 when they download a consensus directory. Closes ticket 32696.
1706 o Minor features (entry guards):
1707 - Reinstate support for GUARD NEW/UP/DOWN control port events.
1708 Closes ticket 40001.
1710 o Minor features (linux seccomp2 sandbox, portability):
1711 - Allow Tor to build on platforms where it doesn't know how to
1712 report which syscall caused the linux seccomp2 sandbox to fail.
1713 This change should make the sandbox code more portable to less
1714 common Linux architectures. Closes ticket 34382.
1715 - Permit the unlinkat() syscall, which some Libc implementations use
1716 to implement unlink(). Closes ticket 33346.
1718 o Minor bugfix (CI, Windows):
1719 - Use the correct 64-bit printf format when compiling with MINGW on
1720 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
1722 o Minor bugfix (onion service v3 client):
1723 - Remove a BUG() warning that could occur naturally. Fixes bug
1724 34087; bugfix on 0.3.2.1-alpha.
1726 o Minor bugfix (SOCKS, onion service client):
1727 - Detect v3 onion service addresses of the wrong length when
1728 returning the F6 ExtendedErrors code. Fixes bug 33873; bugfix
1731 o Minor bugfixes (compiler warnings):
1732 - Fix a compiler warning on platforms with 32-bit time_t values.
1733 Fixes bug 40028; bugfix on 0.3.2.8-rc.
1735 o Minor bugfixes (control port, onion service):
1736 - Consistently use 'address' in "Invalid v3 address" response to
1737 ONION_CLIENT_AUTH commands. Previously, we would sometimes say
1738 'addr'. Fixes bug 40005; bugfix on 0.4.3.1-alpha.
1740 o Minor bugfixes (logging):
1741 - Downgrade a noisy log message that could occur naturally when
1742 receiving an extrainfo document that we no longer want. Fixes bug
1743 16016; bugfix on 0.2.6.3-alpha.
1745 o Minor bugfixes (onion services v3):
1746 - Avoid a non-fatal assertion failure in certain edge-cases when
1747 opening an intro circuit as a client. Fixes bug 34084; bugfix
1750 o Deprecated features (onion service v2):
1751 - Add a deprecation warning for version 2 onion services. Closes
1754 o Removed features (IPv6, revert):
1755 - Revert the change in the default value of ClientPreferIPv6OrPort:
1756 it breaks the torsocks use case. The SOCKS resolve command has no
1757 mechanism to ask for a specific address family (v4 or v6), and so
1758 prioritizing IPv6 when an IPv4 address is requested on the SOCKS
1759 interface resulted in a failure. Tor Browser explicitly sets
1760 PreferIPv6, so this should not affect the majority of our users.
1761 Closes ticket 33796; bugfix on 0.4.4.1-alpha.
1764 Changes in version 0.4.4.1-alpha - 2020-06-16
1765 This is the first alpha release in the 0.4.4.x series. It improves
1766 our guard selection algorithms, improves the amount of code that
1767 can be disabled when running without relay support, and includes numerous
1768 small bugfixes and enhancements. It also lays the ground for some IPv6
1769 features that we'll be developing more in the next (0.4.5) series.
1771 Here are the changes since 0.4.3.5.
1773 o Major features (Proposal 310, performance + security):
1774 - Implements Proposal 310, "Bandaid on guard selection". Proposal
1775 310 solves load-balancing issues with older versions of the guard
1776 selection algorithm, and improves its security. Under this new
1777 algorithm, a newly selected guard never becomes Primary unless all
1778 previously sampled guards are unreachable. Implements
1779 recommendation from 32088. (Proposal 310 is linked to the CLAPS
1780 project researching optimal client location-aware path selections.
1781 This project is a collaboration between the UCLouvain Crypto Group,
1782 the U.S. Naval Research Laboratory, and Princeton University.)
1784 o Major features (IPv6, relay):
1785 - Consider IPv6-only EXTEND2 cells valid on relays. Log a protocol
1786 warning if the IPv4 or IPv6 address is an internal address, and
1787 internal addresses are not allowed. But continue to use the other
1788 address, if it is valid. Closes ticket 33817.
1789 - If a relay can extend over IPv4 and IPv6, and both addresses are
1790 provided, it chooses between them uniformly at random. Closes
1792 - Re-use existing IPv6 connections for circuit extends. Closes
1794 - Relays may extend circuits over IPv6, if the relay has an IPv6
1795 ORPort, and the client supplies the other relay's IPv6 ORPort in
1796 the EXTEND2 cell. IPv6 extends will be used by the relay IPv6
1797 ORPort self-tests in 33222. Closes ticket 33817.
1799 o Major features (v3 onion services):
1800 - Allow v3 onion services to act as OnionBalance backend instances,
1801 by using the HiddenServiceOnionBalanceInstance torrc option.
1802 Closes ticket 32709.
1804 o Minor feature (developer tools):
1805 - Add a script to help check the alphabetical ordering of option
1806 names in the manual page. Closes ticket 33339.
1808 o Minor feature (onion service client, SOCKS5):
1809 - Add 3 new SocksPort ExtendedErrors (F2, F3, F7) that reports back
1810 new type of onion service connection failures. The semantics of
1811 these error codes are documented in proposal 309. Closes
1814 o Minor feature (onion service v3):
1815 - If a service cannot upload its descriptor(s), log why at INFO
1816 level. Closes ticket 33400; bugfix on 0.3.2.1-alpha.
1818 o Minor feature (python scripts):
1819 - Stop assuming that /usr/bin/python exists. Instead of using a
1820 hardcoded path in scripts that still use Python 2, use
1821 /usr/bin/env, similarly to the scripts that use Python 3. Fixes
1822 bug 33192; bugfix on 0.4.2.
1824 o Minor features (client-only compilation):
1825 - Disable more code related to the ext_orport protocol when
1826 compiling without support for relay mode. Closes ticket 33368.
1827 - Disable more of our self-testing code when support for relay mode
1828 is disabled. Closes ticket 33370.
1830 o Minor features (code safety):
1831 - Check for failures of tor_inet_ntop() and tor_inet_ntoa()
1832 functions in DNS and IP address processing code, and adjust
1833 codepaths to make them less likely to crash entire Tor instances.
1834 Resolves issue 33788.
1836 o Minor features (compilation size):
1837 - Most server-side DNS code is now disabled when building without
1838 support for relay mode. Closes ticket 33366.
1840 o Minor features (continuous integration):
1841 - Run unit-test and integration test (Stem, Chutney) jobs with
1842 ALL_BUGS_ARE_FATAL macro being enabled on Travis and Appveyor.
1843 Resolves ticket 32143.
1845 o Minor features (control port):
1846 - Return a descriptive error message from the 'GETINFO status/fresh-
1847 relay-descs' command on the control port. Previously, we returned
1848 a generic error of "Error generating descriptor". Closes ticket
1849 32873. Patch by Neel Chauhan.
1851 o Minor features (developer tooling):
1852 - Refrain from listing all .a files that are generated by the Tor
1853 build in .gitignore. Add a single wildcard *.a entry that covers
1854 all of them for present and future. Closes ticket 33642.
1855 - Add a script ("git-install-tools.sh") to install git hooks and
1856 helper scripts. Closes ticket 33451.
1858 o Minor features (directory authority, shared random):
1859 - Refactor more authority-only parts of the shared-random scheduling
1860 code to reside in the dirauth module, and to be disabled when
1861 compiling with --disable-module-dirauth. Closes ticket 33436.
1863 o Minor features (directory):
1864 - Remember the number of bytes we have downloaded for each directory
1865 purpose while bootstrapping, and while fully bootstrapped. Log
1866 this information as part of the heartbeat message. Closes
1869 o Minor features (IPv6 support):
1870 - Adds IPv6 support to tor_addr_is_valid(). Adds tests for the above
1871 changes and tor_addr_is_null(). Closes ticket 33679. Patch
1873 - Allow clients and relays to send dual-stack and IPv6-only EXTEND2
1874 cells. Parse dual-stack and IPv6-only EXTEND2 cells on relays.
1875 Closes ticket 33901.
1877 o Minor features (logging):
1878 - When trying to find our own address, add debug-level logging to
1879 report the sources of candidate addresses. Closes ticket 32888.
1881 o Minor features (testing, architecture):
1882 - Our test scripts now double-check that subsystem initialization
1883 order is consistent with the inter-module dependencies established
1884 by our .may_include files. Implements ticket 31634.
1885 - Initialize all subsystems at the beginning of our unit test
1886 harness, to avoid crashes due to uninitialized subsystems. Follow-
1887 up from ticket 33316.
1889 o Minor features (v3 onion services):
1890 - Add v3 onion service status to the dumpstats() call which is
1891 triggered by a SIGUSR1 signal. Previously, we only did v2 onion
1892 services. Closes ticket 24844. Patch by Neel Chauhan.
1894 o Minor features (windows):
1895 - Add support for console control signals like Ctrl+C in Windows.
1896 Closes ticket 34211. Patch from Damon Harris (TheDcoder).
1898 o Minor bugfix (onion service v3):
1899 - Prevent an assert() that would occur when cleaning the client
1900 descriptor cache, and attempting to close circuits for a non-
1901 decrypted descriptor (lacking client authorization). Fixes bug
1902 33458; bugfix on 0.4.2.1-alpha.
1904 o Minor bugfix (refactoring):
1905 - Lift circuit_build_times_disabled() out of the
1906 circuit_expire_building() loop, to save CPU time when there are
1907 many circuits open. Fixes bug 33977; bugfix on 0.3.5.9.
1909 o Minor bugfixes (client performance):
1910 - Resume use of preemptively-built circuits when UseEntryGuards is set
1911 to 0. We accidentally disabled this feature with that config
1912 setting, leading to slower load times. Fixes bug 34303; bugfix
1915 o Minor bugfixes (directory authorities):
1916 - Directory authorities now reject votes that arrive too late. In
1917 particular, once an authority has started fetching missing votes,
1918 it no longer accepts new votes posted by other authorities. This
1919 change helps prevent a consensus split, where only some authorities
1920 have the late vote. Fixes bug 4631; bugfix on 0.2.0.5-alpha.
1922 o Minor bugfixes (git scripts):
1923 - Stop executing the checked-out pre-commit hook from the pre-push
1924 hook. Instead, execute the copy in the user's git directory. Fixes
1925 bug 33284; bugfix on 0.4.1.1-alpha.
1927 o Minor bugfixes (initialization):
1928 - Initialize the subsystems in our code in an order more closely
1929 corresponding to their dependencies, so that every system is
1930 initialized before the ones that (theoretically) depend on it.
1931 Fixes bug 33316; bugfix on 0.4.0.1-alpha.
1933 o Minor bugfixes (IPv4, relay):
1934 - Check for invalid zero IPv4 addresses and ports when sending and
1935 receiving extend cells. Fixes bug 33900; bugfix on 0.2.4.8-alpha.
1937 o Minor bugfixes (IPv6, relay):
1938 - Consider IPv6 addresses when checking if a connection is
1939 canonical. In 17604, relays assumed that a remote relay could
1940 consider an IPv6 connection canonical, but did not set the
1941 canonical flag on their side of the connection. Fixes bug 33899;
1942 bugfix on 0.3.1.1-alpha.
1943 - Log IPv6 addresses on connections where this relay is the
1944 responder. Previously, responding relays would replace the remote
1945 IPv6 address with the IPv4 address from the consensus. Fixes bug
1946 33899; bugfix on 0.3.1.1-alpha.
1948 o Minor bugfixes (linux seccomp sandbox nss):
1949 - Fix a startup crash when tor is compiled with --enable-nss and
1950 sandbox support is enabled. Fixes bug 34130; bugfix on
1951 0.3.5.1-alpha. Patch by Daniel Pinto.
1953 o Minor bugfixes (logging, testing):
1954 - Make all of tor's assertion macros support the ALL_BUGS_ARE_FATAL
1955 and DISABLE_ASSERTS_IN_UNIT_TESTS debugging modes. (IF_BUG_ONCE()
1956 used to log a non-fatal warning, regardless of the debugging
1957 mode.) Fixes bug 33917; bugfix on 0.2.9.1-alpha.
1959 o Minor bugfixes (logs):
1960 - Remove surprising empty line in the INFO-level log about circuit
1961 build timeout. Fixes bug 33531; bugfix on 0.3.3.1-alpha.
1963 o Minor bugfixes (mainloop):
1964 - Better guard against growing a buffer past its maximum 2GB in
1965 size. Fixes bug 33131; bugfix on 0.3.0.4-rc.
1967 o Minor bugfixes (manual page):
1968 - Update the man page to reflect that MinUptimeHidServDirectoryV2
1969 defaults to 96 hours. Fixes bug 34299; bugfix on 0.2.6.3-alpha.
1971 o Minor bugfixes (onion service v3, client):
1972 - Remove a BUG() that was causing a stacktrace when a descriptor
1973 changed at an unexpected time. Fixes bug 28992; bugfix
1976 o Minor bugfixes (onion service, logging):
1977 - Fix a typo in a log message PublishHidServDescriptors is set to 0.
1978 Fixes bug 33779; bugfix on 0.3.2.1-alpha.
1980 o Minor bugfixes (portability):
1981 - Fix a portability error in the configure script, where we were
1982 using "==" instead of "=". Fixes bug 34233; bugfix on 0.4.3.5.
1984 o Minor bugfixes (protocol versions):
1985 - Sort tor's supported protocol version lists, as recommended by the
1986 tor directory specification. Fixes bug 33285; bugfix
1989 o Minor bugfixes (relays):
1990 - Stop advertising incorrect IPv6 ORPorts in relay and bridge
1991 descriptors, when the IPv6 port was configured as "auto". Fixes
1992 bug 32588; bugfix on 0.2.3.9-alpha.
1994 o Code simplification and refactoring:
1995 - Define and use a new constant TOR_ADDRPORT_BUF_LEN which is like
1996 TOR_ADDR_BUF_LEN but includes enough space for an IP address,
1997 brackets, separating colon, and port number. Closes ticket 33956.
1998 Patch by Neel Chauhan.
1999 - Merge the orconn and ocirc events into the "core" subsystem, which
2000 manages or connections and origin circuits. Previously they were
2001 isolated in subsystems of their own.
2002 - Move LOG_PROTOCOL_WARN to app/config. Resolves a dependency
2003 inversion. Closes ticket 33633.
2004 - Move the circuit extend code to the relay module. Split the
2005 circuit extend function into smaller functions. Closes
2007 - Rewrite port_parse_config() to use the default port flags from
2008 port_cfg_new(). Closes ticket 32994. Patch by MrSquanchee.
2009 - Updated comments in 'scheduler.c' to reflect old code changes, and
2010 simplified the scheduler channel state change code. Closes
2014 - Document the limitations of using %include on config files with
2015 seccomp sandbox enabled. Fixes documentation bug 34133; bugfix on
2016 0.3.1.1-alpha. Patch by Daniel Pinto.
2017 - Fix several doxygen warnings related to imbalanced groups. Closes
2021 - Remove the ClientAutoIPv6ORPort option. This option attempted to
2022 randomly choose between IPv4 and IPv6 for client connections, and
2023 wasn't a true implementation of Happy Eyeballs. Often, this option
2024 failed on IPv4-only or IPv6-only connections. Closes ticket 32905.
2025 Patch by Neel Chauhan.
2026 - Stop shipping contrib/dist/rc.subr file, as it is not being used
2027 on FreeBSD anymore. Closes issue 31576.
2030 - Add a basic IPv6 test to "make test-network". This test only runs
2031 when the local machine has an IPv6 stack. Closes ticket 33300.
2032 - Add test-network-ipv4 and test-network-ipv6 jobs to the Makefile.
2033 These jobs run the IPv4-only and dual-stack chutney flavours from
2034 test-network-all. Closes ticket 33280.
2035 - Remove a redundant distcheck job. Closes ticket 33194.
2036 - Run the test-network-ipv6 Makefile target in the Travis CI IPv6
2037 chutney job. This job runs on macOS, so it's a bit slow. Closes
2039 - Sort the Travis jobs in order of speed. Putting the slowest jobs
2040 first takes full advantage of Travis job concurrency. Closes
2042 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
2043 previously configured to fast_finish (which requires
2044 allow_failure), to speed up the build. Closes ticket 33195.
2045 - Test v3 onion services to tor's mixed IPv4 chutney network. And
2046 add a mixed IPv6 chutney network. These networks are used in the
2047 test-network-all, test-network-ipv4, and test-network-ipv6 make
2048 targets. Closes ticket 33334.
2049 - Use the "bridges+hs-v23" chutney network flavour in "make test-
2050 network". This test requires a recent version of chutney (mid-
2051 February 2020). Closes ticket 28208.
2052 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
2053 tool to produce detailed diagnostic output. Closes ticket 32792.
2055 o Code simplification and refactoring (onion service):
2056 - Refactor configuration parsing to use the new config subsystem
2057 code. Closes ticket 33014.
2059 o Code simplification and refactoring (relay address):
2060 - Move a series of functions related to address resolving into their
2061 own files. Closes ticket 33789.
2063 o Documentation (manual page):
2064 - Add cross reference links and a table of contents to the HTML tor
2065 manual page. Closes ticket 33369. Work by Swati Thacker as part of
2066 Google Season of Docs.
2067 - Alphabetize the Denial of Service Mitigation Options, Directory
2068 Authority Server Options, Hidden Service Options, and Testing
2069 Network Options sections of the tor(1) manual page. Closes ticket
2070 33275. Work by Swati Thacker as part of Google Season of Docs.
2071 - Refrain from mentioning nicknames in manpage section for MyFamily
2072 torrc option. Resolves issue 33417.
2073 - Updated the options set by TestingTorNetwork in the manual page.
2074 Closes ticket 33778.
2077 Changes in version 0.4.3.5 - 2020-05-15
2078 Tor 0.4.3.5 is the first stable release in the 0.4.3.x series. This
2079 series adds support for building without relay code enabled, and
2080 implements functionality needed for OnionBalance with v3 onion
2081 services. It includes significant refactoring of our configuration and
2082 controller functionality, and fixes numerous smaller bugs and
2085 Per our support policy, we support each stable release series for nine
2086 months after its first stable release, or three months after the first
2087 stable release of the next series: whichever is longer. This means
2088 that 0.4.3.x will be supported until around February 2021--later, if
2089 0.4.4.x is later than anticipated.
2091 Note also that support for 0.4.1.x is about to end on May 20 of this
2092 year; 0.4.2.x will be supported until September 15. We still plan to
2093 continue supporting 0.3.5.x, our long-term stable series, until
2096 Below are the changes since 0.4.3.4-rc. For a complete list of changes
2097 since 0.4.2.6, see the ReleaseNotes file.
2099 o Minor bugfixes (compiler compatibility):
2100 - Avoid compiler warnings from Clang 10 related to the use of GCC-
2101 style "/* falls through */" comments. Both Clang and GCC allow
2102 __attribute__((fallthrough)) instead, so that's what we're using
2103 now. Fixes bug 34078; bugfix on 0.3.1.3-alpha.
2104 - Fix compilation warnings with GCC 10.0.1. Fixes bug 34077; bugfix
2107 o Minor bugfixes (logging):
2108 - Stop truncating IPv6 addresses and ports in channel and connection
2109 logs. Fixes bug 33918; bugfix on 0.2.4.4-alpha.
2110 - Fix a logic error in a log message about whether an address was
2111 invalid. Previously, the code would never report that onion
2112 addresses were onion addresses. Fixes bug 34131; bugfix
2116 Changes in version 0.4.3.4-rc - 2020-04-13
2117 Tor 0.4.3.4-rc is the first release candidate in its series. It fixes
2118 several bugs from earlier versions, including one affecting DoS
2119 defenses on bridges using pluggable transports.
2121 o Major bugfixes (DoS defenses, bridges, pluggable transport):
2122 - Fix a bug that was preventing DoS defenses from running on bridges
2123 with a pluggable transport. Previously, the DoS subsystem was not
2124 given the transport name of the client connection, thus failed to
2125 find the GeoIP cache entry for that client address. Fixes bug
2126 33491; bugfix on 0.3.3.2-alpha.
2128 o Minor feature (sendme, flow control):
2129 - Default to sending SENDME version 1 cells. (Clients are already
2130 sending these, because of a consensus parameter telling them to do
2131 so: this change only affects what clients would do if the
2132 consensus didn't contain a recommendation.) Closes ticket 33623.
2134 o Minor features (testing):
2135 - The unit tests now support a "TOR_SKIP_TESTCASES" environment
2136 variable to specify a list of space-separated test cases that
2137 should not be executed. We will use this to disable certain tests
2138 that are failing on Appveyor because of mismatched OpenSSL
2139 libraries. Part of ticket 33643.
2141 o Minor bugfixes (--disable-module-relay):
2142 - Fix an assertion failure when Tor is built without the relay
2143 module, and then invoked with the "User" option. Fixes bug 33668;
2144 bugfix on 0.4.3.1-alpha.
2146 o Minor bugfixes (--disable-module-relay,--disable-module-dirauth):
2147 - Set some output arguments in the relay and dirauth module stubs,
2148 to guard against future stub argument handling bugs like 33668.
2149 Fixes bug 33674; bugfix on 0.4.3.1-alpha.
2151 o Minor bugfixes (build system):
2152 - Correctly output the enabled module in the configure summary.
2153 Before that, the list shown was just plain wrong. Fixes bug 33646;
2154 bugfix on 0.4.3.2-alpha.
2156 o Minor bugfixes (client, IPv6):
2157 - Stop forcing all non-SocksPorts to prefer IPv6 exit connections.
2158 Instead, prefer IPv6 connections by default, but allow users to
2159 change their configs using the "NoPreferIPv6" port flag. Fixes bug
2160 33608; bugfix on 0.4.3.1-alpha.
2161 - Revert PreferIPv6 set by default on the SocksPort because it broke
2162 the torsocks use case. Tor doesn't have a way for an application
2163 to request the hostname to be resolved for a specific IP version,
2164 but torsocks requires that. Up until now, IPv4 was used by default
2165 so torsocks is expecting that, and can't handle a possible IPv6
2166 being returned. Fixes bug 33804; bugfix on 0.4.3.1-alpha.
2168 o Minor bugfixes (key portability):
2169 - When reading PEM-encoded key data, tolerate CRLF line-endings even
2170 if we are not running on Windows. Previously, non-Windows hosts
2171 would reject these line-endings in certain positions, making
2172 certain key files hard to move from one host to another. Fixes bug
2173 33032; bugfix on 0.3.5.1-alpha.
2175 o Minor bugfixes (logging):
2176 - Flush stderr, stdout, and file logs during shutdown, if supported
2177 by the OS. This change helps make sure that any final logs are
2178 recorded. Fixes bug 33087; bugfix on 0.4.1.6.
2179 - Stop closing stderr and stdout during shutdown. Closing these file
2180 descriptors can hide sanitiser logs. Fixes bug 33087; bugfix
2183 o Minor bugfixes (onion services v3):
2184 - Relax severity of a log message that can appear naturally when
2185 decoding onion service descriptors as a relay. Also add some
2186 diagnostics to debug any future bugs in that area. Fixes bug
2187 31669; bugfix on 0.3.0.1-alpha.
2188 - Block a client-side assertion by disallowing the registration of
2189 an x25519 client auth key that's all zeroes. Fixes bug 33545;
2190 bugfix on 0.4.3.1-alpha. Based on patch from "cypherpunks".
2192 o Code simplification and refactoring:
2193 - Disable our coding standards best practices tracker in our git
2194 hooks. (0.4.3 branches only.) Closes ticket 33678.
2197 - Avoid conflicts between the fake sockets in tor's unit tests, and
2198 real file descriptors. Resolves issues running unit tests with
2199 GitHub Actions, where the process that embeds or launches the
2200 tests has already opened a large number of file descriptors. Fixes
2201 bug 33782; bugfix on 0.2.8.1-alpha. Found and fixed by
2205 - In our Appveyor Windows CI, copy required DLLs to test and app
2206 directories, before running tor's tests. This ensures that tor.exe
2207 and test*.exe use the correct version of each DLL. This fix is not
2208 required, but we hope it will avoid DLL search issues in future.
2209 Fixes bug 33673; bugfix on 0.3.4.2-alpha.
2210 - On Appveyor, skip the crypto/openssl_version test, which is
2211 failing because of a mismatched library installation. Fix
2215 Changes in version 0.4.3.3-alpha - 2020-03-18
2216 Tor 0.4.3.3-alpha fixes several bugs in previous releases, including
2217 TROVE-2020-002, a major denial-of-service vulnerability that affected
2218 all released Tor instances since 0.2.1.5-alpha. Using this
2219 vulnerability, an attacker could cause Tor instances to consume a huge
2220 amount of CPU, disrupting their operations for several seconds or
2221 minutes. This attack could be launched by anybody against a relay, or
2222 by a directory cache against any client that had connected to it. The
2223 attacker could launch this attack as much as they wanted, thereby
2224 disrupting service or creating patterns that could aid in traffic
2225 analysis. This issue was found by OSS-Fuzz, and is also tracked
2228 We do not have reason to believe that this attack is currently being
2229 exploited in the wild, but nonetheless we advise everyone to upgrade
2230 as soon as packages are available.
2232 o Major bugfixes (security, denial-of-service):
2233 - Fix a denial-of-service bug that could be used by anyone to
2234 consume a bunch of CPU on any Tor relay or authority, or by
2235 directories to consume a bunch of CPU on clients or hidden
2236 services. Because of the potential for CPU consumption to
2237 introduce observable timing patterns, we are treating this as a
2238 high-severity security issue. Fixes bug 33119; bugfix on
2239 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
2240 as TROVE-2020-002 and CVE-2020-10592.
2242 o Major bugfixes (circuit padding, memory leak):
2243 - Avoid a remotely triggered memory leak in the case that a circuit
2244 padding machine is somehow negotiated twice on the same circuit.
2245 Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls.
2246 This is also tracked as TROVE-2020-004 and CVE-2020-10593.
2248 o Major bugfixes (directory authority):
2249 - Directory authorities will now send a 503 (not enough bandwidth)
2250 code to clients when under bandwidth pressure. Known relays and
2251 other authorities will always be answered regardless of the
2252 bandwidth situation. Fixes bug 33029; bugfix on 0.1.2.5-alpha.
2254 o Minor features (diagnostic):
2255 - Improve assertions and add some memory-poisoning code to try to
2256 track down possible causes of a rare crash (32564) in the EWMA
2257 code. Closes ticket 33290.
2259 o Minor features (directory authorities):
2260 - Directory authorities now reject descriptors from relays running
2261 Tor versions from the 0.2.9 and 0.4.0 series. The 0.3.5 series is
2262 still allowed. Resolves ticket 32672. Patch by Neel Chauhan.
2264 o Minor features (usability):
2265 - Include more information when failing to parse a configuration
2266 value. This should make it easier to tell what's going wrong when
2267 a configuration file doesn't parse. Closes ticket 33460.
2269 o Minor bugfix (relay, configuration):
2270 - Warn if the ContactInfo field is not set, and tell the relay
2271 operator that not having a ContactInfo field set might cause their
2272 relay to get rejected in the future. Fixes bug 33361; bugfix
2275 o Minor bugfixes (coding best practices checks):
2276 - Allow the "practracker" script to read unicode files when using
2277 Python 2. We made the script use unicode literals in 0.4.3.1-alpha,
2278 but didn't change the codec for opening files. Fixes bug 33374;
2279 bugfix on 0.4.3.1-alpha.
2281 o Minor bugfixes (continuous integration):
2282 - Remove the buggy and unused mirroring job. Fixes bug 33213; bugfix
2285 o Minor bugfixes (onion service v3, client):
2286 - Remove a BUG() warning that would cause a stack trace if an onion
2287 service descriptor was freed while we were waiting for a
2288 rendezvous circuit to complete. Fixes bug 28992; bugfix
2291 o Minor bugfixes (onion services v3):
2292 - Fix an assertion failure that could result from a corrupted
2293 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
2294 bugfix on 0.3.3.1-alpha. This issue is also tracked
2297 o Documentation (manpage):
2298 - Alphabetize the Server and Directory server sections of the tor
2299 manpage. Also split Statistics options into their own section of
2300 the manpage. Closes ticket 33188. Work by Swati Thacker as part of
2301 Google Season of Docs.
2302 - Document the __OwningControllerProcess torrc option and specify
2303 its polling interval. Resolves issue 32971.
2305 o Testing (Travis CI):
2306 - Remove a redundant distcheck job. Closes ticket 33194.
2307 - Sort the Travis jobs in order of speed: putting the slowest jobs
2308 first takes full advantage of Travis job concurrency. Closes
2310 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
2311 previously configured to fast_finish (which requires
2312 allow_failure), to speed up the build. Closes ticket 33195.
2313 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
2314 tool to produce detailed diagnostic output. Closes ticket 32792.
2317 Changes in version 0.4.2.7 - 2020-03-18
2318 This is the third stable release in the 0.4.2.x series. It backports
2319 numerous fixes from later releases, including a fix for TROVE-2020-
2320 002, a major denial-of-service vulnerability that affected all
2321 released Tor instances since 0.2.1.5-alpha. Using this vulnerability,
2322 an attacker could cause Tor instances to consume a huge amount of CPU,
2323 disrupting their operations for several seconds or minutes. This
2324 attack could be launched by anybody against a relay, or by a directory
2325 cache against any client that had connected to it. The attacker could
2326 launch this attack as much as they wanted, thereby disrupting service
2327 or creating patterns that could aid in traffic analysis. This issue
2328 was found by OSS-Fuzz, and is also tracked as CVE-2020-10592.
2330 We do not have reason to believe that this attack is currently being
2331 exploited in the wild, but nonetheless we advise everyone to upgrade
2332 as soon as packages are available.
2334 o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha):
2335 - Fix a denial-of-service bug that could be used by anyone to
2336 consume a bunch of CPU on any Tor relay or authority, or by
2337 directories to consume a bunch of CPU on clients or hidden
2338 services. Because of the potential for CPU consumption to
2339 introduce observable timing patterns, we are treating this as a
2340 high-severity security issue. Fixes bug 33119; bugfix on
2341 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
2342 as TROVE-2020-002 and CVE-2020-10592.
2344 o Major bugfixes (circuit padding, memory leak, backport from 0.4.3.3-alpha):
2345 - Avoid a remotely triggered memory leak in the case that a circuit
2346 padding machine is somehow negotiated twice on the same circuit.
2347 Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls.
2348 This is also tracked as TROVE-2020-004 and CVE-2020-10593.
2350 o Major bugfixes (directory authority, backport from 0.4.3.3-alpha):
2351 - Directory authorities will now send a 503 (not enough bandwidth)
2352 code to clients when under bandwidth pressure. Known relays and
2353 other authorities will always be answered regardless of the
2354 bandwidth situation. Fixes bug 33029; bugfix on 0.1.2.5-alpha.
2356 o Minor features (continuous integration, backport from 0.4.3.2-alpha):
2357 - Stop allowing failures on the Travis CI stem tests job. It looks
2358 like all the stem hangs we were seeing before are now fixed.
2359 Closes ticket 33075.
2361 o Minor bugfixes (bridges, backport from 0.4.3.1-alpha):
2362 - Lowercase the configured value of BridgeDistribution before adding
2363 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
2365 o Minor bugfixes (logging, backport from 0.4.3.2-alpha):
2366 - If we encounter a bug when flushing a buffer to a TLS connection,
2367 only log the bug once per invocation of the Tor process.
2368 Previously we would log with every occurrence, which could cause
2369 us to run out of disk space. Fixes bug 33093; bugfix
2372 o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha):
2373 - Fix an assertion failure that could result from a corrupted
2374 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
2375 bugfix on 0.3.3.1-alpha. This issue is also tracked
2378 o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha):
2379 - Fix a syntax warning given by newer versions of Rust that was
2380 creating problems for our continuous integration. Fixes bug 33212;
2381 bugfix on 0.3.5.1-alpha.
2383 o Testing (Travis CI, backport from 0.4.3.3-alpha):
2384 - Remove a redundant distcheck job. Closes ticket 33194.
2385 - Sort the Travis jobs in order of speed: putting the slowest jobs
2386 first takes full advantage of Travis job concurrency. Closes
2388 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
2389 previously configured to fast_finish (which requires
2390 allow_failure), to speed up the build. Closes ticket 33195.
2391 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
2392 tool to produce detailed diagnostic output. Closes ticket 32792.
2395 Changes in version 0.4.1.9 - 2020-03-18
2396 Tor 0.4.1.9 backports important fixes from later Tor releases,
2397 including a fix for TROVE-2020-002, a major denial-of-service
2398 vulnerability that affected all released Tor instances since
2399 0.2.1.5-alpha. Using this vulnerability, an attacker could cause Tor
2400 instances to consume a huge amount of CPU, disrupting their operations
2401 for several seconds or minutes. This attack could be launched by
2402 anybody against a relay, or by a directory cache against any client
2403 that had connected to it. The attacker could launch this attack as
2404 much as they wanted, thereby disrupting service or creating patterns
2405 that could aid in traffic analysis. This issue was found by OSS-Fuzz,
2406 and is also tracked as CVE-2020-10592.
2408 We do not have reason to believe that this attack is currently being
2409 exploited in the wild, but nonetheless we advise everyone to upgrade
2410 as soon as packages are available.
2412 o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha):
2413 - Fix a denial-of-service bug that could be used by anyone to
2414 consume a bunch of CPU on any Tor relay or authority, or by
2415 directories to consume a bunch of CPU on clients or hidden
2416 services. Because of the potential for CPU consumption to
2417 introduce observable timing patterns, we are treating this as a
2418 high-severity security issue. Fixes bug 33119; bugfix on
2419 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
2420 as TROVE-2020-002 and CVE-2020-10592.
2422 o Major bugfixes (circuit padding, memory leak, backport from 0.4.3.3-alpha):
2423 - Avoid a remotely triggered memory leak in the case that a circuit
2424 padding machine is somehow negotiated twice on the same circuit.
2425 Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls.
2426 This is also tracked as TROVE-2020-004 and CVE-2020-10593.
2428 o Minor bugfixes (bridges, backport from 0.4.3.1-alpha):
2429 - Lowercase the configured value of BridgeDistribution before adding
2430 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
2432 o Minor bugfixes (logging, backport from 0.4.3.2-alpha):
2433 - If we encounter a bug when flushing a buffer to a TLS connection,
2434 only log the bug once per invocation of the Tor process.
2435 Previously we would log with every occurrence, which could cause
2436 us to run out of disk space. Fixes bug 33093; bugfix
2439 o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha):
2440 - Fix an assertion failure that could result from a corrupted
2441 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
2442 bugfix on 0.3.3.1-alpha. This issue is also tracked
2445 o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha):
2446 - Fix a syntax warning given by newer versions of Rust that was
2447 creating problems for our continuous integration. Fixes bug 33212;
2448 bugfix on 0.3.5.1-alpha.
2450 o Testing (Travis CI, backport from 0.4.3.3-alpha):
2451 - Remove a redundant distcheck job. Closes ticket 33194.
2452 - Sort the Travis jobs in order of speed: putting the slowest jobs
2453 first takes full advantage of Travis job concurrency. Closes
2455 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
2456 previously configured to fast_finish (which requires
2457 allow_failure), to speed up the build. Closes ticket 33195.
2458 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
2459 tool to produce detailed diagnostic output. Closes ticket 32792.
2462 Changes in version 0.3.5.10 - 2020-03-18
2463 Tor 0.3.5.10 backports many fixes from later Tor releases, including a
2464 fix for TROVE-2020-002, a major denial-of-service vulnerability that
2465 affected all released Tor instances since 0.2.1.5-alpha. Using this
2466 vulnerability, an attacker could cause Tor instances to consume a huge
2467 amount of CPU, disrupting their operations for several seconds or
2468 minutes. This attack could be launched by anybody against a relay, or
2469 by a directory cache against any client that had connected to it. The
2470 attacker could launch this attack as much as they wanted, thereby
2471 disrupting service or creating patterns that could aid in traffic
2472 analysis. This issue was found by OSS-Fuzz, and is also tracked
2475 We do not have reason to believe that this attack is currently being
2476 exploited in the wild, but nonetheless we advise everyone to upgrade
2477 as soon as packages are available.
2479 o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha):
2480 - Fix a denial-of-service bug that could be used by anyone to
2481 consume a bunch of CPU on any Tor relay or authority, or by
2482 directories to consume a bunch of CPU on clients or hidden
2483 services. Because of the potential for CPU consumption to
2484 introduce observable timing patterns, we are treating this as a
2485 high-severity security issue. Fixes bug 33119; bugfix on
2486 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
2487 as TROVE-2020-002 and CVE-2020-10592.
2489 o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha):
2490 - Correct how we use libseccomp. Particularly, stop assuming that
2491 rules are applied in a particular order or that more rules are
2492 processed after the first match. Neither is the case! In
2493 libseccomp <2.4.0 this lead to some rules having no effect.
2494 libseccomp 2.4.0 changed how rules are generated, leading to a
2495 different ordering, which in turn led to a fatal crash during
2496 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
2499 o Minor features (continuous integration, backport from 0.4.3.2-alpha):
2500 - Stop allowing failures on the Travis CI stem tests job. It looks
2501 like all the stem hangs we were seeing before are now fixed.
2502 Closes ticket 33075.
2504 o Minor bugfixes (bridges, backport from 0.4.3.1-alpha):
2505 - Lowercase the configured value of BridgeDistribution before adding
2506 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
2508 o Minor bugfixes (crash, backport from 0.4.2.4-rc):
2509 - When running Tor with an option like --verify-config or
2510 --dump-config that does not start the event loop, avoid crashing
2511 if we try to exit early because of an error. Fixes bug 32407;
2512 bugfix on 0.3.3.1-alpha.
2514 o Minor bugfixes (logging, backport from 0.4.3.2-alpha):
2515 - If we encounter a bug when flushing a buffer to a TLS connection,
2516 only log the bug once per invocation of the Tor process.
2517 Previously we would log with every occurrence, which could cause
2518 us to run out of disk space. Fixes bug 33093; bugfix
2521 o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha):
2522 - Fix an assertion failure that could result from a corrupted
2523 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
2524 bugfix on 0.3.3.1-alpha. This issue is also tracked
2527 o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha):
2528 - Fix a syntax warning given by newer versions of Rust that was
2529 creating problems for our continuous integration. Fixes bug 33212;
2530 bugfix on 0.3.5.1-alpha.
2532 o Testing (backport from 0.4.3.1-alpha):
2533 - Re-enable the Travis CI macOS Chutney build, but don't let it
2534 prevent the Travis job from finishing. (The Travis macOS jobs are
2535 slow, so we don't want to have it delay the whole CI process.)
2536 Closes ticket 32629.
2537 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
2538 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
2539 fix the sandbox errors in 32722. Closes ticket 32240.
2541 o Testing (continuous integration, backport from 0.4.3.1-alpha):
2542 - Use zstd in our Travis Linux builds. Closes ticket 32242.
2544 o Testing (Travis CI, backport from 0.4.3.3-alpha):
2545 - Remove a redundant distcheck job. Closes ticket 33194.
2546 - Sort the Travis jobs in order of speed: putting the slowest jobs
2547 first takes full advantage of Travis job concurrency. Closes
2549 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
2550 previously configured to fast_finish (which requires
2551 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
2552 tool to produce detailed diagnostic output. Closes ticket 32792.
2555 Changes in version 0.4.3.2-alpha - 2020-02-10
2556 This is the second stable alpha release in the Tor 0.4.3.x series. It
2557 fixes several bugs present in the previous alpha release. Anybody
2558 running the previous alpha should upgrade, and look for bugs in this
2561 o Major bugfixes (onion service client, authorization):
2562 - On a NEWNYM signal, purge entries from the ephemeral client
2563 authorization cache. The permanent ones are kept. Fixes bug 33139;
2564 bugfix on 0.4.3.1-alpha.
2566 o Minor features (best practices tracker):
2567 - Practracker now supports a --regen-overbroad option to regenerate
2568 the exceptions file, but only to revise exceptions to be _less_
2569 tolerant of best-practices violations. Closes ticket 32372.
2571 o Minor features (continuous integration):
2572 - Run Doxygen Makefile target on Travis, so we can learn about
2573 regressions in our internal documentation. Closes ticket 32455.
2574 - Stop allowing failures on the Travis CI stem tests job. It looks
2575 like all the stem hangs we were seeing before are now fixed.
2576 Closes ticket 33075.
2578 o Minor bugfixes (build system):
2579 - Revise configure options that were either missing or incorrect in
2580 the configure summary. Fixes bug 32230; bugfix on 0.4.3.1-alpha.
2582 o Minor bugfixes (controller protocol):
2583 - Fix a memory leak introduced by refactoring of control reply
2584 formatting code. Fixes bug 33039; bugfix on 0.4.3.1-alpha.
2585 - Fix a memory leak in GETINFO responses. Fixes bug 33103; bugfix
2587 - When receiving "ACTIVE" or "DORMANT" signals on the control port,
2588 report them as SIGNAL events. Previously we would log a bug
2589 warning. Fixes bug 33104; bugfix on 0.4.0.1-alpha.
2591 o Minor bugfixes (logging):
2592 - If we encounter a bug when flushing a buffer to a TLS connection,
2593 only log the bug once per invocation of the Tor process.
2594 Previously we would log with every occurrence, which could cause
2595 us to run out of disk space. Fixes bug 33093; bugfix
2597 - When logging a bug, do not say "Future instances of this warning
2598 will be silenced" unless we are actually going to silence them.
2599 Previously we would say this whenever a BUG() check failed in the
2600 code. Fixes bug 33095; bugfix on 0.4.1.1-alpha.
2602 o Minor bugfixes (onion service v2):
2603 - Move a series of v2 onion service warnings to protocol-warning
2604 level because they can all be triggered remotely by a malformed
2605 request. Fixes bug 32706; bugfix on 0.1.1.14-alpha.
2607 o Minor bugfixes (onion service v3, client authorization):
2608 - When removing client authorization credentials using the control
2609 port, also remove the associated descriptor, so the onion service
2610 can no longer be contacted. Fixes bug 33148; bugfix
2613 o Minor bugfixes (pluggable transports):
2614 - When receiving a message on standard error from a pluggable
2615 transport, log it at info level, rather than as a warning. Fixes
2616 bug 33005; bugfix on 0.4.0.1-alpha.
2618 o Minor bugfixes (rust, build):
2619 - Fix a syntax warning given by newer versions of Rust that was
2620 creating problems for our continuous integration. Fixes bug 33212;
2621 bugfix on 0.3.5.1-alpha.
2623 o Minor bugfixes (TLS bug handling):
2624 - When encountering a bug in buf_read_from_tls(), return a "MISC"
2625 error code rather than "WANTWRITE". This change might help avoid
2626 some CPU-wasting loops if the bug is ever triggered. Bug reported
2627 by opara. Fixes bug 32673; bugfix on 0.3.0.4-alpha.
2629 o Code simplification and refactoring (mainloop):
2630 - Simplify the ip_address_changed() function by removing redundant
2631 checks. Closes ticket 33091.
2633 o Documentation (manpage):
2634 - Split "Circuit Timeout" options and "Node Selection" options into
2635 their own sections of the tor manpage. Closes tickets 32928 and
2636 32929. Work by Swati Thacker as part of Google Season of Docs.
2639 Changes in version 0.4.2.6 - 2020-01-30
2640 This is the second stable release in the 0.4.2.x series. It backports
2641 several bugfixes from 0.4.3.1-alpha, including some that had affected
2642 the Linux seccomp2 sandbox or Windows services. If you're running with
2643 one of those configurations, you'll probably want to upgrade;
2644 otherwise, you should be fine with 0.4.2.5.
2646 o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha):
2647 - Correct how we use libseccomp. Particularly, stop assuming that
2648 rules are applied in a particular order or that more rules are
2649 processed after the first match. Neither is the case! In
2650 libseccomp <2.4.0 this led to some rules having no effect.
2651 libseccomp 2.4.0 changed how rules are generated, leading to a
2652 different ordering, which in turn led to a fatal crash during
2653 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
2655 - Fix crash when reloading logging configuration while the
2656 experimental sandbox is enabled. Fixes bug 32841; bugfix on
2657 0.4.1.7. Patch by Peter Gerber.
2659 o Minor bugfixes (correctness checks, backport from 0.4.3.1-alpha):
2660 - Use GCC/Clang's printf-checking feature to make sure that
2661 tor_assertf() arguments are correctly typed. Fixes bug 32765;
2662 bugfix on 0.4.1.1-alpha.
2664 o Minor bugfixes (logging, crash, backport from 0.4.3.1-alpha):
2665 - Avoid a possible crash when trying to log a (fatal) assertion
2666 failure about mismatched magic numbers in configuration objects.
2667 Fixes bug 32771; bugfix on 0.4.2.1-alpha.
2669 o Minor bugfixes (testing, backport from 0.4.3.1-alpha):
2670 - When TOR_DISABLE_PRACTRACKER is set, do not apply it to the
2671 test_practracker.sh script. Doing so caused a test failure. Fixes
2672 bug 32705; bugfix on 0.4.2.1-alpha.
2673 - When TOR_DISABLE_PRACTRACKER is set, log a notice to stderr when
2674 skipping practracker checks. Fixes bug 32705; bugfix
2677 o Minor bugfixes (windows service, backport from 0.4.3.1-alpha):
2678 - Initialize the publish/subscribe system when running as a windows
2679 service. Fixes bug 32778; bugfix on 0.4.1.1-alpha.
2681 o Testing (backport from 0.4.3.1-alpha):
2682 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
2683 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
2684 fix the sandbox errors in 32722. Closes ticket 32240.
2685 - Re-enable the Travis CI macOS Chutney build, but don't let it
2686 prevent the Travis job from finishing. (The Travis macOS jobs are
2687 slow, so we don't want to have it delay the whole CI process.)
2688 Closes ticket 32629.
2690 o Testing (continuous integration, backport from 0.4.3.1-alpha):
2691 - Use zstd in our Travis Linux builds. Closes ticket 32242.
2694 Changes in version 0.4.1.8 - 2020-01-30
2695 This release backports several bugfixes from later release series,
2696 including some that had affected the Linux seccomp2 sandbox or Windows
2697 services. If you're running with one of those configurations, you'll
2698 probably want to upgrade; otherwise, you should be fine with your
2699 current version of 0.4.1.x.
2701 o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha):
2702 - Correct how we use libseccomp. Particularly, stop assuming that
2703 rules are applied in a particular order or that more rules are
2704 processed after the first match. Neither is the case! In
2705 libseccomp <2.4.0 this led to some rules having no effect.
2706 libseccomp 2.4.0 changed how rules are generated, leading to a
2707 different ordering, which in turn led to a fatal crash during
2708 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
2710 - Fix crash when reloading logging configuration while the
2711 experimental sandbox is enabled. Fixes bug 32841; bugfix on
2712 0.4.1.7. Patch by Peter Gerber.
2714 o Minor bugfixes (crash, backport form 0.4.2.4-rc):
2715 - When running Tor with an option like --verify-config or
2716 --dump-config that does not start the event loop, avoid crashing
2717 if we try to exit early because of an error. Fixes bug 32407;
2718 bugfix on 0.3.3.1-alpha.
2720 o Minor bugfixes (windows service, backport from 0.4.3.1-alpha):
2721 - Initialize the publish/subscribe system when running as a windows
2722 service. Fixes bug 32778; bugfix on 0.4.1.1-alpha.
2724 o Testing (backport from 0.4.3.1-alpha):
2725 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
2726 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
2727 fix the sandbox errors in 32722. Closes ticket 32240.
2728 - Re-enable the Travis CI macOS Chutney build, but don't let it
2729 prevent the Travis job from finishing. (The Travis macOS jobs are
2730 slow, so we don't want to have it delay the whole CI process.)
2731 Closes ticket 32629.
2733 o Testing (continuous integration, backport from 0.4.3.1-alpha):
2734 - Use zstd in our Travis Linux builds. Closes ticket 32242.
2737 Changes in version 0.4.3.1-alpha - 2020-01-22
2738 This is the first alpha release in the 0.4.3.x series. It includes
2739 improved support for application integration of onion services, support
2740 for building in a client-only mode, and newly improved internal
2741 documentation (online at https://src-ref.docs.torproject.org/tor/). It
2742 also has numerous other small bugfixes and features, as well as
2743 improvements to our code's internal organization that should help us
2744 write better code in the future.
2746 o New system requirements:
2747 - When building Tor, you now need to have Python 3 in order to run
2748 the integration tests. (Python 2 is officially unsupported
2749 upstream, as of 1 Jan 2020.) Closes ticket 32608.
2751 o Major features (build system):
2752 - The relay code can now be disabled using the --disable-module-relay
2753 configure option. When this option is set, we also disable the
2754 dirauth module. Closes ticket 32123.
2755 - When Tor is compiled --disable-module-relay, we also omit the code
2756 used to act as a directory cache. Closes ticket 32487.
2758 o Major features (directory authority, ed25519):
2759 - Add support for banning a relay's ed25519 keys in the approved-
2760 routers file. This will help us migrate away from RSA keys in the
2761 future. Previously, only RSA keys could be banned in approved-
2762 routers. Resolves ticket 22029. Patch by Neel Chauhan.
2764 o Major features (onion service, controller):
2765 - New control port commands to manage client-side onion service
2766 authorization credentials. The ONION_CLIENT_AUTH_ADD command adds
2767 a credential, ONION_CLIENT_AUTH_REMOVE deletes a credential, and
2768 ONION_CLIENT_AUTH_VIEW lists the credentials. Closes ticket 30381.
2770 o Major features (onion service, SOCKS5):
2771 - Introduce a new SocksPort flag, ExtendedErrors, to support more
2772 detailed error codes in information for applications that support
2773 them. Closes ticket 30382; implements proposal 304.
2775 o Major features (proxy):
2776 - In addition to its current supported proxy types (HTTP CONNECT,
2777 SOCKS4, and SOCKS5), Tor can now make its OR connections through a
2778 HAProxy server. A new torrc option was added to specify the
2779 address/port of the server: TCPProxy <protocol> <host>:<port>.
2780 Currently the only supported protocol for the option is haproxy.
2781 Closes ticket 31518. Patch done by Suphanat Chunhapanya (haxxpop).
2783 o Major bugfixes (linux seccomp sandbox):
2784 - Correct how we use libseccomp. Particularly, stop assuming that
2785 rules are applied in a particular order or that more rules are
2786 processed after the first match. Neither is the case! In
2787 libseccomp <2.4.0 this led to some rules having no effect.
2788 libseccomp 2.4.0 changed how rules are generated, leading to a
2789 different ordering, which in turn led to a fatal crash during
2790 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
2792 - Fix crash when reloading logging configuration while the
2793 experimental sandbox is enabled. Fixes bug 32841; bugfix on
2794 0.4.1.7. Patch by Peter Gerber.
2796 o Major bugfixes (networking):
2797 - Correctly handle IPv6 addresses in SOCKS5 RESOLVE_PTR requests,
2798 and accept strings as well as binary addresses. Fixes bug 32315;
2799 bugfix on 0.3.5.1-alpha.
2801 o Major bugfixes (onion service):
2802 - Report HS circuit failure back into the HS subsystem so we take
2803 appropriate action with regards to the client introduction point
2804 failure cache. This improves reachability of onion services, since
2805 now clients notice failing introduction circuits properly. Fixes
2806 bug 32020; bugfix on 0.3.2.1-alpha.
2808 o Minor feature (configure, build system):
2809 - Output a list of enabled/disabled features at the end of the
2810 configure process in a pleasing way. Closes ticket 31373.
2812 o Minor feature (heartbeat, onion service):
2813 - Add the DoS INTRODUCE2 defenses counter to the heartbeat DoS
2814 message. Closes ticket 31371.
2816 o Minor features (configuration validation):
2817 - Configuration validation can now be done by per-module callbacks,
2818 rather than a global validation function. This will let us reduce
2819 the size of config.c and some of its more cumbersome functions.
2820 Closes ticket 31241.
2822 o Minor features (configuration):
2823 - If a configured hardware crypto accelerator in AccelName is
2824 prefixed with "!", Tor now exits when it cannot be found. Closes
2826 - We now use flag-driven logic to warn about obsolete configuration
2827 fields, so that we can include their names. In 0.4.2, we used a
2828 special type, which prevented us from generating good warnings.
2829 Implements ticket 32404.
2831 o Minor features (controller):
2832 - Add stream isolation data to STREAM event. Closes ticket 19859.
2833 - Implement a new GETINFO command to fetch microdescriptor
2834 consensus. Closes ticket 31684.
2836 o Minor features (debugging, directory system):
2837 - Don't crash when we find a non-guard with a guard-fraction value
2838 set. Instead, log a bug warning, in an attempt to figure out how
2839 this happened. Diagnostic for ticket 32868.
2841 o Minor features (defense in depth):
2842 - Add additional checks around tor_vasprintf() usage, in case the
2843 function returns an error. Patch by Tobias Stoeckmann. Fixes
2846 o Minor features (developer tooling):
2847 - Remove the 0.2.9.x series branches from git scripts (git-merge-
2848 forward.sh, git-pull-all.sh, git-push-all.sh, git-setup-dirs.sh).
2849 Closes ticket 32772.
2851 o Minor features (developer tools):
2852 - Add a check_cocci_parse.sh script that checks that new code is
2853 parseable by Coccinelle. Add an exceptions file for unparseable
2854 files, and run the script from travis CI. Closes ticket 31919.
2855 - Call the check_cocci_parse.sh script from a 'check-cocci' Makefile
2856 target. Closes ticket 31919.
2857 - Add a rename_c_identifiers.py tool to rename a bunch of C
2858 identifiers at once, and generate a well-formed commit message
2859 describing the change. This should help with refactoring. Closes
2861 - Add some scripts in "scripts/coccinelle" to invoke the Coccinelle
2862 semantic patching tool with the correct flags. These flags are
2863 fairly easy to forget, and these scripts should help us use
2864 Coccinelle more effectively in the future. Closes ticket 31705.
2866 o Minor features (Doxygen):
2867 - Update Doxygen configuration file to a more recent template (from
2868 1.8.15). Closes ticket 32110.
2869 - "make doxygen" now works with out-of-tree builds. Closes
2871 - Make sure that doxygen outputs documentation for all of our C
2872 files. Previously, some were missing @file declarations, causing
2873 them to be ignored. Closes ticket 32307.
2874 - Our "make doxygen" target now respects --enable-fatal-warnings by
2875 default, and does not warn about items that are missing
2876 documentation. To warn about missing documentation, run configure
2877 with the "--enable-missing-doc-warnings" flag: doing so suspends
2878 fatal warnings for doxygen. Closes ticket 32385.
2880 o Minor features (git scripts):
2881 - Add TOR_EXTRA_CLONE_ARGS to git-setup-dirs.sh for git clone
2882 customisation. Closes ticket 32347.
2883 - Add git-setup-dirs.sh, which sets up an upstream git repository
2884 and worktrees for tor maintainers. Closes ticket 29603.
2885 - Add TOR_EXTRA_REMOTE_* to git-setup-dirs.sh for a custom extra
2886 remote. Closes ticket 32347.
2887 - Call the check_cocci_parse.sh script from the git commit and push
2888 hooks. Closes ticket 31919.
2889 - Make git-push-all.sh skip unchanged branches when pushing to
2890 upstream. The script already skipped unchanged test branches.
2891 Closes ticket 32216.
2892 - Make git-setup-dirs.sh create a master symlink in the worktree
2893 directory. Closes ticket 32347.
2894 - Skip unmodified source files when doing some existing git hook
2895 checks. Related to ticket 31919.
2897 o Minor features (IPv6, client):
2898 - Make Tor clients tell dual-stack exits that they prefer IPv6
2899 connections. This change is equivalent to setting the PreferIPv6
2900 flag on SOCKSPorts (and most other listener ports). Tor Browser
2901 has been setting this flag for some time, and we want to remove a
2902 client distinguisher at exits. Closes ticket 32637.
2904 o Minor features (portability, android):
2905 - When building for Android, disable some tests that depend on $HOME
2906 and/or pwdb, which Android doesn't have. Closes ticket 32825.
2907 Patch from Hans-Christoph Steiner.
2909 o Minor features (relay modularity):
2910 - Split the relay and server pluggable transport config code into
2911 separate files in the relay module. Disable this code when the
2912 relay module is disabled. Closes part of ticket 32213.
2913 - When the relay module is disabled, reject attempts to set the
2914 ORPort, DirPort, DirCache, BridgeRelay, ExtORPort, or
2915 ServerTransport* options, rather than ignoring the values of these
2916 options. Closes part of ticket 32213.
2918 o Minor features (relay):
2919 - When the relay module is disabled, change the default config so
2920 that DirCache is 0, and ClientOnly is 1. Closes ticket 32410.
2922 o Minor features (release tools):
2923 - Port our ChangeLog formatting and sorting tools to Python 3.
2924 Closes ticket 32704.
2926 o Minor features (testing):
2927 - Detect some common failure cases for test_parseconf.sh in
2928 src/test/conf_failures. Closes ticket 32451.
2929 - Allow test_parseconf.sh to test expected log outputs for successful
2930 configs, as well as failed configs. Closes ticket 32451.
2931 - The test_parseconf.sh script now supports result variants for any
2932 combination of the optional libraries lzma, nss, and zstd. Closes
2935 o Minor features (tests, Android):
2936 - When running the unit tests on Android, create temporary files in
2937 a subdirectory of /data/local/tmp. Closes ticket 32172. Based on a
2938 patch from Hans-Christoph Steiner.
2940 o Minor bugfixes (bridges):
2941 - Lowercase the configured value of BridgeDistribution before adding
2942 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
2944 o Minor bugfixes (build system):
2945 - Fix "make autostyle" for out-of-tree builds. Fixes bug 32370;
2946 bugfix on 0.4.1.2-alpha.
2948 o Minor bugfixes (configuration handling):
2949 - Make control_event_conf_changed() take in a config_line_t instead
2950 of a smartlist of alternating key/value entries. Fixes bug 31531;
2951 bugfix on 0.2.3.3-alpha. Patch by Neel Chauhan.
2953 o Minor bugfixes (configuration):
2954 - Check for multiplication overflow when parsing memory units inside
2955 configuration. Fixes bug 30920; bugfix on 0.0.9rc1.
2956 - When dumping the configuration, stop adding a trailing space after
2957 the option name when there is no option value. This issue only
2958 affects options that accept an empty value or list. (Most options
2959 reject empty values, or delete the entire line from the dumped
2960 options.) Fixes bug 32352; bugfix on 0.0.9pre6.
2961 - Avoid changing the user's value of HardwareAccel as stored by
2962 SAVECONF, when AccelName is set but HardwareAccel is not. Fixes
2963 bug 32382; bugfix on 0.2.2.1-alpha.
2964 - When creating a KeyDirectory with the same location as the
2965 DataDirectory (not recommended), respect the DataDirectory's
2966 group-readable setting if one has not been set for the
2967 KeyDirectory. Fixes bug 27992; bugfix on 0.3.3.1-alpha.
2969 o Minor bugfixes (controller):
2970 - In routerstatus_has_changed(), check all the fields that are
2971 output over the control port. Fixes bug 20218; bugfix
2974 o Minor bugfixes (correctness checks):
2975 - Use GCC/Clang's printf-checking feature to make sure that
2976 tor_assertf() arguments are correctly typed. Fixes bug 32765;
2977 bugfix on 0.4.1.1-alpha.
2979 o Minor bugfixes (developer tools):
2980 - Allow paths starting with ./ in scripts/add_c_file.py. Fixes bug
2981 31336; bugfix on 0.4.1.2-alpha.
2983 o Minor bugfixes (dirauth module):
2984 - Split the dirauth config code into a separate file in the dirauth
2985 module. Disable this code when the dirauth module is disabled.
2986 Closes ticket 32213.
2987 - When the dirauth module is disabled, reject attempts to set the
2988 AuthoritativeDir option, rather than ignoring the value of the
2989 option. Fixes bug 32213; bugfix on 0.3.4.1-alpha.
2991 o Minor bugfixes (embedded Tor):
2992 - When starting Tor any time after the first time in a process,
2993 register the thread in which it is running as the main thread.
2994 Previously, we only did this on Windows, which could lead to bugs
2995 like 23081 on non-Windows platforms. Fixes bug 32884; bugfix
2998 o Minor bugfixes (git scripts):
2999 - Avoid sleeping before the last push in git-push-all.sh. Closes
3001 - Forward all unrecognised arguments in git-push-all.sh to git push.
3002 Closes ticket 32216.
3004 o Minor bugfixes (hidden service v3):
3005 - Do not rely on a "circuit established" flag for intro circuits but
3006 instead always query the HS circuit map. This is to avoid sync
3007 issue with that flag and the map. Fixes bug 32094; bugfix
3010 o Minor bugfixes (logging, crash):
3011 - Avoid a possible crash when trying to log a (fatal) assertion
3012 failure about mismatched magic numbers in configuration objects.
3013 Fixes bug 32771; bugfix on 0.4.2.1-alpha.
3015 o Minor bugfixes (onion service v2):
3016 - When sending the INTRO cell for a v2 Onion Service, look at the
3017 failure cache alongside timeout values to check if the intro point
3018 is marked as failed. Previously, we only looked at the relay
3019 timeout values. Fixes bug 25568; bugfix on 0.2.7.3-rc. Patch by
3022 o Minor bugfixes (onion services v3, client):
3023 - Properly handle the client rendezvous circuit timeout. Previously
3024 Tor would sometimes timeout a rendezvous circuit awaiting the
3025 introduction ACK, and find itself unable to re-establish all
3026 circuits because the rendezvous circuit timed out too early. Fixes
3027 bug 32021; bugfix on 0.3.2.1-alpha.
3029 o Minor bugfixes (onion services):
3030 - In cancel_descriptor_fetches(), use
3031 connection_list_by_type_purpose() instead of
3032 connection_list_by_type_state(). Fixes bug 32639; bugfix on
3033 0.3.2.1-alpha. Patch by Neel Chauhan.
3035 o Minor bugfixes (scripts):
3036 - Fix update_versions.py for out-of-tree builds. Fixes bug 32371;
3037 bugfix on 0.4.0.1-alpha.
3039 o Minor bugfixes (test):
3040 - Use the same code to find the tor binary in all of our test
3041 scripts. This change makes sure we are always using the coverage
3042 binary when coverage is enabled. Fixes bug 32368; bugfix
3045 o Minor bugfixes (testing):
3046 - Stop ignoring "tor --dump-config" errors in test_parseconf.sh.
3047 Fixes bug 32468; bugfix on 0.4.2.1-alpha.
3048 - When TOR_DISABLE_PRACTRACKER is set, do not apply it to the
3049 test_practracker.sh script. Doing so caused a test failure. Fixes
3050 bug 32705; bugfix on 0.4.2.1-alpha.
3051 - When TOR_DISABLE_PRACTRACKER is set, log a notice to stderr when
3052 skipping practracker checks. Fixes bug 32705; bugfix
3055 o Minor bugfixes (tests):
3056 - Our option-validation tests no longer depend on specially
3057 configured non-default, non-passing sets of options. Previously,
3058 the tests had been written to assume that options would _not_ be
3059 set to their defaults, which led to needless complexity and
3060 verbosity. Fixes bug 32175; bugfix on 0.2.8.1-alpha.
3062 o Minor bugfixes (windows service):
3063 - Initialize the publish/subscribe system when running as a windows
3064 service. Fixes bug 32778; bugfix on 0.4.1.1-alpha.
3066 o Deprecated features:
3067 - Deprecate the ClientAutoIPv6ORPort option. This option was not
3068 true "Happy Eyeballs", and often failed on connections that
3069 weren't reliably dual-stack. Closes ticket 32942. Patch by
3073 - Provide a quickstart guide for a Circuit Padding Framework, and
3074 documentation for researchers to implement and study circuit
3075 padding machines. Closes ticket 28804.
3076 - Add documentation in 'HelpfulTools.md' to describe how to build a
3077 tag file. Closes ticket 32779.
3078 - Create a high-level description of the long-term software
3079 architecture goals. Closes ticket 32206.
3080 - Describe the --dump-config command in the manual page. Closes
3082 - Unite coding advice from this_not_that.md in torguts repo into our
3083 coding standards document. Resolves ticket 31853.
3086 - Our Doxygen configuration no longer generates LaTeX output. The
3087 reference manual produced by doing this was over 4000 pages long,
3088 and generally unusable. Closes ticket 32099.
3089 - The option "TestingEstimatedDescriptorPropagationTime" is now
3090 marked as obsolete. It has had no effect since 0.3.0.7, when
3091 clients stopped rejecting consensuses "from the future". Closes
3093 - We no longer support consensus methods before method 28; these
3094 methods were only used by authorities running versions of Tor that
3095 are now at end-of-life. In effect, this means that clients,
3096 relays, and authorities now assume that authorities will be
3097 running version 0.3.5.x or later. Closes ticket 32695.
3100 - Add more test cases for tor's UTF-8 validation function. Also,
3101 check the arguments passed to the function for consistency. Closes
3103 - Improve test coverage for relay and dirauth config code, focusing
3104 on option validation and normalization. Closes ticket 32213.
3105 - Improve the consistency of test_parseconf.sh output, and run all
3106 the tests, even if one fails. Closes ticket 32213.
3107 - Re-enable the Travis CI macOS Chutney build, but don't let it
3108 prevent the Travis job from finishing. (The Travis macOS jobs are
3109 slow, so we don't want to have it delay the whole CI process.)
3110 Closes ticket 32629.
3111 - Run the practracker unit tests in the pre-commit git hook. Closes
3113 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
3114 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
3115 fix the sandbox errors in 32722. Closes ticket 32240.
3117 o Code simplification and refactoring (channel):
3118 - Channel layer had a variable length cell handler that was not used
3119 and thus removed. Closes ticket 32892.
3121 o Code simplification and refactoring (configuration):
3122 - Immutability is now implemented as a flag on individual
3123 configuration options rather than as part of the option-transition
3124 checking code. Closes ticket 32344.
3125 - Instead of keeping a list of configuration options to check for
3126 relative paths, check all the options whose type is "FILENAME".
3127 Solves part of ticket 32339.
3128 - Our default log (which ordinarily sends NOTICE-level messages to
3129 standard output) is now handled in a more logical manner.
3130 Previously, we replaced the configured log options if they were
3131 empty. Now, we interpret an empty set of log options as meaning
3132 "use the default log". Closes ticket 31999.
3133 - Remove some unused arguments from the options_validate() function,
3134 to simplify our code and tests. Closes ticket 32187.
3135 - Simplify the options_validate() code so that it looks at the
3136 default options directly, rather than taking default options as an
3137 argument. This change lets us simplify its interface. Closes
3139 - Use our new configuration architecture to move most authority-
3140 related options to the directory authority module. Closes
3142 - When parsing the command line, handle options that determine our
3143 "quiet level" and our mode of operation (e.g., --dump-config and
3144 so on) all in one table. Closes ticket 32003.
3146 o Code simplification and refactoring (controller):
3147 - Create a new abstraction for formatting control protocol reply
3148 lines based on key-value pairs. Refactor some existing control
3149 protocol code to take advantage of this. Closes ticket 30984.
3150 - Create a helper function that can fetch network status or
3151 microdesc consensuses. Closes ticket 31684.
3153 o Code simplification and refactoring (dirauth modularization):
3154 - Remove the last remaining HAVE_MODULE_DIRAUTH inside a function.
3155 Closes ticket 32163.
3156 - Replace some confusing identifiers in process_descs.c. Closes
3158 - Simplify some relay and dirauth config code. Closes ticket 32213.
3160 o Code simplification and refactoring (misc):
3161 - Make all the structs we declare follow the same naming convention
3162 of ending with "_t". Closes ticket 32415.
3163 - Move and rename some configuration-related code for clarity.
3164 Closes ticket 32304.
3165 - Our include.am files are now broken up by subdirectory.
3166 Previously, src/core/include.am covered all of the subdirectories
3167 in "core", "feature", and "app". Closes ticket 32137.
3168 - Remove underused NS*() macros from test code: they make our tests
3169 more confusing, especially for code-formatting tools. Closes
3172 o Code simplification and refactoring (relay modularization):
3173 - Disable relay_periodic when the relay module is disabled. Closes
3175 - Disable relay_sys when the relay module is disabled. Closes
3178 o Code simplification and refactoring (tool support):
3179 - Add numerous missing dependencies to our include files, so that
3180 they can be included in different reasonable orders and still
3181 compile. Addresses part of ticket 32764.
3182 - Fix some parts of our code that were difficult for Coccinelle to
3183 parse. Related to ticket 31705.
3184 - Fix some small issues in our code that prevented automatic
3185 formatting tools from working. Addresses part of ticket 32764.
3187 o Documentation (manpage):
3188 - Alphabetize the Client Options section of the tor manpage. Closes
3190 - Alphabetize the General Options section of the tor manpage. Closes
3192 - In the tor(1) manpage, reword and improve formatting of the
3193 COMMAND-LINE OPTIONS and DESCRIPTION sections. Closes ticket
3194 32277. Based on work by Swati Thacker as part of Google Season
3196 - In the tor(1) manpage, reword and improve formatting of the FILES,
3197 SEE ALSO, and BUGS sections. Closes ticket 32176. Based on work by
3198 Swati Thacker as part of Google Season of Docs.
3200 o Testing (circuit, EWMA):
3201 - Add unit tests for circuitmux and EWMA subsystems. Closes
3204 o Testing (continuous integration):
3205 - Use zstd in our Travis Linux builds. Closes ticket 32242.
3208 Changes in version 0.4.2.5 - 2019-12-09
3209 This is the first stable release in the 0.4.2.x series. This series
3210 improves reliability and stability, and includes several stability and
3211 correctness improvements for onion services. It also fixes many smaller
3212 bugs present in previous series.
3214 Per our support policy, we will support the 0.4.2.x series for nine
3215 months, or until three months after the release of a stable 0.4.3.x:
3216 whichever is longer. If you need longer-term support, please stick
3217 with 0.3.5.x, which will we plan to support until Feb 2022.
3219 Per our support policy, we will support the 0.4.2.x series for nine
3220 months, or until three months after the release of a stable 0.4.3.x:
3221 whichever is longer. If you need longer-term support, please stick
3222 with 0.3.5.x, which will we plan to support until Feb 2022.
3224 Below are the changes since 0.4.1.4-rc. For a complete list of changes
3225 since 0.4.1.5, see the ReleaseNotes file.
3227 o Minor features (geoip):
3228 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
3229 Country database. Closes ticket 32685.
3232 - Require C99 standards-conforming code in Travis CI, but allow GNU
3233 gcc extensions. Also activates clang's -Wtypedef-redefinition
3234 warnings. Build some jobs with -std=gnu99, and some jobs without.
3235 Closes ticket 32500.
3238 Changes in version 0.4.1.7 - 2019-12-09
3239 This release backports several bugfixes to improve stability and
3240 correctness. Anyone experiencing build problems or crashes with 0.4.1.6,
3241 including all relays relying on AccountingMax, should upgrade.
3243 o Major features (directory authorities, backport from 0.4.2.2-alpha):
3244 - Directory authorities now reject relays running all currently
3245 deprecated release series. The currently supported release series
3246 are: 0.2.9, 0.3.5, 0.4.0, 0.4.1, and 0.4.2. Closes ticket 31549.
3248 o Major bugfixes (embedded Tor, backport from 0.4.2.2-alpha):
3249 - Avoid a possible crash when restarting Tor in embedded mode and
3250 enabling a different set of publish/subscribe messages. Fixes bug
3251 31898; bugfix on 0.4.1.1-alpha.
3253 o Major bugfixes (relay, backport from 0.4.2.3-alpha):
3254 - Relays now respect their AccountingMax bandwidth again. When
3255 relays entered "soft" hibernation (which typically starts when
3256 we've hit 90% of our AccountingMax), we had stopped checking
3257 whether we should enter hard hibernation. Soft hibernation refuses
3258 new connections and new circuits, but the existing circuits can
3259 continue, meaning that relays could have exceeded their configured
3260 AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.
3262 o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha):
3263 - Stop ignoring torrc options after an %include directive, when the
3264 included directory ends with a file that does not contain any
3265 config options (but does contain comments or whitespace). Fixes
3266 bug 31408; bugfix on 0.3.1.1-alpha.
3268 o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha):
3269 - Onion services now always use the exact number of intro points
3270 configured with the HiddenServiceNumIntroductionPoints option (or
3271 fewer if nodes are excluded). Before, a service could sometimes
3272 pick more intro points than configured. Fixes bug 31548; bugfix
3275 o Minor features (continuous integration, backport from 0.4.2.2-alpha):
3276 - When building on Appveyor and Travis, pass the "-k" flag to make,
3277 so that we are informed of all compilation failures, not just the
3278 first one or two. Closes ticket 31372.
3280 o Minor features (geoip, backport from 0.4.2.5):
3281 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
3282 Country database. Closes ticket 32685.
3284 o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha):
3285 - Avoid spurious errors when Appveyor CI fails before the install step.
3286 Fixes bug 31884; bugfix on 0.3.4.2-alpha.
3288 o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc):
3289 - Fix a BUG() assertion that occurs within a very small race window
3290 between when a client intro circuit opens and when its descriptor
3291 gets cleaned up from the cache. The circuit is now closed early,
3292 which will trigger a re-fetch of the descriptor and continue the
3293 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
3295 o Minor bugfixes (connections, backport from 0.4.2.3-rc):
3296 - Avoid trying to read data from closed connections, which can cause
3297 needless loops in Libevent and infinite loops in Shadow. Fixes bug
3298 30344; bugfix on 0.1.1.1-alpha.
3300 o Minor bugfixes (error handling, backport from 0.4.2.1-alpha):
3301 - On abort, try harder to flush the output buffers of log messages.
3302 On some platforms (macOS), log messages could be discarded when
3303 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
3304 - Report the tor version whenever an assertion fails. Previously, we
3305 only reported the Tor version on some crashes, and some non-fatal
3306 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
3307 - When tor aborts due to an error, close log file descriptors before
3308 aborting. Closing the logs makes some OSes flush log file buffers,
3309 rather than deleting buffered log lines. Fixes bug 31594; bugfix
3312 o Minor bugfixes (logging, backport from 0.4.2.2-alpha):
3313 - Add a missing check for HAVE_PTHREAD_H, because the backtrace code
3314 uses mutexes. Fixes bug 31614; bugfix on 0.2.5.2-alpha.
3315 - Disable backtrace signal handlers when shutting down tor. Fixes
3316 bug 31614; bugfix on 0.2.5.2-alpha.
3317 - Rate-limit our the logging message about the obsolete .exit
3318 notation. Previously, there was no limit on this warning, which
3319 could potentially be triggered many times by a hostile website.
3320 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
3322 o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha):
3323 - Do not log a nonfatal assertion failure when receiving a VERSIONS
3324 cell on a connection using the obsolete v1 link protocol. Log a
3325 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
3327 o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha):
3328 - Reset the periodic events' "enabled" flag when Tor is shut down
3329 cleanly. Previously, this flag was left on, which caused periodic
3330 events not to be re-enabled when Tor was relaunched in-process
3331 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
3334 o Minor bugfixes (multithreading, backport from 0.4.2.2-alpha):
3335 - Avoid some undefined behaviour when freeing mutexes. Fixes bug
3336 31736; bugfix on 0.0.7.
3338 o Minor bugfixes (process management, backport from 0.4.2.3-alpha):
3339 - Remove overly strict assertions that triggered when a pluggable
3340 transport failed to launch. Fixes bug 31091; bugfix
3342 - Remove an assertion in the Unix process backend. This assertion
3343 would trigger when we failed to find the executable for a child
3344 process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.
3346 o Minor bugfixes (relay, backport from 0.4.2.2-alpha):
3347 - Avoid crashing when starting with a corrupt keys directory where
3348 the old ntor key and the new ntor key are identical. Fixes bug
3349 30916; bugfix on 0.2.4.8-alpha.
3351 o Minor bugfixes (testing, backport from 0.4.2.3-alpha):
3352 - When testing port rebinding, don't busy-wait for tor to log.
3353 Instead, actually sleep for a short time before polling again.
3354 Also improve the formatting of control commands and log messages.
3355 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
3357 o Minor bugfixes (tests, SunOS, backport from 0.4.2.2-alpha):
3358 - Avoid a map_anon_nofork test failure due to a signed/unsigned
3359 integer comparison. Fixes bug 31897; bugfix on 0.4.1.1-alpha.
3361 o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha):
3362 - Log bugs about the TLS read buffer's length only once, rather than
3363 filling the logs with similar warnings. Fixes bug 31939; bugfix
3366 o Documentation (backport from 0.4.2.2-alpha):
3367 - Explain why we can't destroy the backtrace buffer mutex. Explain
3368 why we don't need to destroy the log mutex. Closes ticket 31736.
3370 o Testing (continuous integration, backport from 0.4.2.3-alpha):
3371 - Disable all but one Travis CI macOS build, to mitigate slow
3372 scheduling of Travis macOS jobs. Closes ticket 32177.
3373 - Run the chutney IPv6 networks as part of Travis CI. Closes
3375 - Simplify the Travis CI build matrix, and optimise for build time.
3376 Closes ticket 31859.
3377 - Use Windows Server 2019 instead of Windows Server 2016 in our
3378 Appveyor builds. Closes ticket 32086.
3380 o Testing (continuous integration, backport from 0.4.2.4-rc):
3381 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
3382 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
3383 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
3384 until we can fix some Bionic permissions issues (see ticket
3385 32240). Related to ticket 31919.
3386 - Install the mingw OpenSSL package in Appveyor. This makes sure
3387 that the OpenSSL headers and libraries match in Tor's Appveyor
3388 builds. (This bug was triggered by an Appveyor image update.)
3389 Fixes bug 32449; bugfix on 0.3.5.6-rc.
3391 o Testing (continuous integration, backport from 0.4.2.5):
3392 - Require C99 standards-conforming code in Travis CI, but allow GNU gcc
3393 extensions. Also activates clang's -Wtypedef-redefinition warnings.
3394 Build some jobs with -std=gnu99, and some jobs without.
3395 Closes ticket 32500.
3398 Changes in version 0.4.0.6 - 2019-12-09
3399 This is the second stable release in the 0.4.0.x series. This release
3400 backports several bugfixes to improve stability and correctness. Anyone
3401 experiencing build problems or crashes with 0.4.0.5, including all relays
3402 relying on AccountingMax, should upgrade.
3404 Note that, per our support policy, support for the 0.4.0.x series will end
3405 on 2 Feb 2020. Anyone still running 0.4.0.x should plan to upgrade to the
3406 latest stable release, or downgrade to 0.3.5.x, which will get long-term
3407 support until 1 Feb 2022.
3409 o Directory authority changes (backport from 0.4.1.5):
3410 - The directory authority "dizum" has a new IP address. Closes
3413 o Major bugfixes (bridges, backport from 0.4.1.2-alpha):
3414 - Consider our directory information to have changed when our list
3415 of bridges changes. Previously, Tor would not re-compute the
3416 status of its directory information when bridges changed, and
3417 therefore would not realize that it was no longer able to build
3418 circuits. Fixes part of bug 29875.
3419 - Do not count previously configured working bridges towards our
3420 total of working bridges. Previously, when Tor's list of bridges
3421 changed, it would think that the old bridges were still usable,
3422 and delay fetching router descriptors for the new ones. Fixes part
3423 of bug 29875; bugfix on 0.3.0.1-alpha.
3425 o Major bugfixes (circuit build, guard, backport from 0.4.1.4-rc):
3426 - When considering upgrading circuits from "waiting for guard" to
3427 "open", always ignore circuits that are marked for close. Otherwise,
3428 we can end up in the situation where a subsystem is notified that
3429 a closing circuit has just opened, leading to undesirable
3430 behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha.
3432 o Major bugfixes (Onion service reachability, backport from 0.4.1.3-alpha):
3433 - Properly clean up the introduction point map when circuits change
3434 purpose from onion service circuits to pathbias, measurement, or
3435 other circuit types. This should fix some service-side instances
3436 of introduction point failure. Fixes bug 29034; bugfix
3439 o Major bugfixes (onion service v3, backport from 0.4.1.1-alpha):
3440 - Fix an unreachable bug in which an introduction point could try to
3441 send an INTRODUCE_ACK with a status code that Trunnel would refuse
3442 to encode, leading the relay to assert(). We've consolidated the
3443 ABI values into Trunnel now. Fixes bug 30454; bugfix
3445 - Clients can now handle unknown status codes from INTRODUCE_ACK
3446 cells. (The NACK behavior will stay the same.) This will allow us
3447 to extend status codes in the future without breaking the normal
3448 client behavior. Fixes another part of bug 30454; bugfix
3451 o Major bugfixes (relay, backport from 0.4.2.3-alpha):
3452 - Relays now respect their AccountingMax bandwidth again. When
3453 relays entered "soft" hibernation (which typically starts when
3454 we've hit 90% of our AccountingMax), we had stopped checking
3455 whether we should enter hard hibernation. Soft hibernation refuses
3456 new connections and new circuits, but the existing circuits can
3457 continue, meaning that relays could have exceeded their configured
3458 AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.
3460 o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha):
3461 - Stop ignoring torrc options after an %include directive, when the
3462 included directory ends with a file that does not contain any
3463 config options (but does contain comments or whitespace). Fixes
3464 bug 31408; bugfix on 0.3.1.1-alpha.
3466 o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha):
3467 - Onion services now always use the exact number of intro points
3468 configured with the HiddenServiceNumIntroductionPoints option (or
3469 fewer if nodes are excluded). Before, a service could sometimes
3470 pick more intro points than configured. Fixes bug 31548; bugfix
3473 o Minor features (compile-time modules, backport from version 0.4.1.1-alpha):
3474 - Add a "--list-modules" command to print a list of which compile-
3475 time modules are enabled. Closes ticket 30452.
3477 o Minor features (continuous integration, backport from 0.4.1.1-alpha):
3478 - Remove sudo configuration lines from .travis.yml as they are no
3479 longer needed with current Travis build environment. Resolves
3482 o Minor features (continuous integration, backport from 0.4.1.4-rc):
3483 - Our Travis configuration now uses Chutney to run some network
3484 integration tests automatically. Closes ticket 29280.
3486 o Minor features (continuous integration, backport from 0.4.2.2-alpha):
3487 - When building on Appveyor and Travis, pass the "-k" flag to make,
3488 so that we are informed of all compilation failures, not just the
3489 first one or two. Closes ticket 31372.
3491 o Minor features (fallback directory list, backport from 0.4.1.4-rc):
3492 - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc
3493 in December 2018 (of which ~122 were still functional), with a
3494 list of 148 fallbacks (70 new, 78 existing, 79 removed) generated
3495 in June 2019. Closes ticket 28795.
3497 o Minor features (geoip, backport from 0.4.2.5):
3498 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
3499 Country database. Closes ticket 32685.
3501 o Minor features (stem tests, backport from 0.4.2.1-alpha):
3502 - Change "make test-stem" so it only runs the stem tests that use
3503 tor. This change makes test-stem faster and more reliable. Closes
3506 o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha):
3507 - Avoid spurious errors when Appveyor CI fails before the install step.
3508 Fixes bug 31884; bugfix on 0.3.4.2-alpha.
3510 o Minor bugfixes (build system, backport form 0.4.2.1-alpha):
3511 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
3512 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
3514 o Minor bugfixes (circuit isolation, backport from 0.4.1.3-alpha):
3515 - Fix a logic error that prevented the SessionGroup sub-option from
3516 being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha.
3518 o Minor bugfixes (circuit padding, backport from 0.4.1.4-rc):
3519 - On relays, properly check that a padding machine is absent before
3520 logging a warning about it being absent. Fixes bug 30649; bugfix
3523 o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc):
3524 - Fix a BUG() assertion that occurs within a very small race window
3525 between when a client intro circuit opens and when its descriptor
3526 gets cleaned up from the cache. The circuit is now closed early,
3527 which will trigger a re-fetch of the descriptor and continue the
3528 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
3530 o Minor bugfixes (clock skew detection, backport from 0.4.1.5):
3531 - Don't believe clock skew results from NETINFO cells that appear to
3532 arrive before we sent the VERSIONS cells they are responding to.
3533 Previously, we would accept them up to 3 minutes "in the past".
3534 Fixes bug 31343; bugfix on 0.2.4.4-alpha.
3536 o Minor bugfixes (compilation warning, backport from 0.4.1.5):
3537 - Fix a compilation warning on Windows about casting a function
3538 pointer for GetTickCount64(). Fixes bug 31374; bugfix
3541 o Minor bugfixes (compilation, backport from 0.4.1.5):
3542 - Avoid using labs() on time_t, which can cause compilation warnings
3543 on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
3545 o Minor bugfixes (compilation, backport from 0.4.2.1-alpha):
3546 - Suppress spurious float-conversion warnings from GCC when calling
3547 floating-point classifier functions on FreeBSD. Fixes part of bug
3548 31687; bugfix on 0.3.1.5-alpha.
3550 o Minor bugfixes (compilation, unusual configurations, backport from 0.4.1.1-alpha):
3551 - Avoid failures when building with the ALL_BUGS_ARE_FATAL option
3552 due to missing declarations of abort(), and prevent other such
3553 failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.
3555 o Minor bugfixes (configuration, proxies, backport from 0.4.1.2-alpha):
3556 - Fix a bug that prevented us from supporting SOCKS5 proxies that
3557 want authentication along with configured (but unused!)
3558 ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.
3560 o Minor bugfixes (connections, backport from 0.4.2.3-rc):
3561 - Avoid trying to read data from closed connections, which can cause
3562 needless loops in Libevent and infinite loops in Shadow. Fixes bug
3563 30344; bugfix on 0.1.1.1-alpha.
3565 o Minor bugfixes (continuous integration, backport from 0.4.1.3-alpha):
3566 - Allow the test-stem job to fail in Travis, because it sometimes
3567 hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha.
3568 - Skip test_rebind on macOS in Travis, because it is unreliable on
3569 macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
3570 - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment
3571 variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
3573 o Minor bugfixes (crash on exit, backport from 0.4.1.4-rc):
3574 - Avoid a set of possible code paths that could try to use freed
3575 memory in routerlist_free() while Tor was exiting. Fixes bug
3576 31003; bugfix on 0.1.2.2-alpha.
3578 o Minor bugfixes (directory authorities, backport from 0.4.1.3-alpha):
3579 - Stop crashing after parsing an unknown descriptor purpose
3580 annotation. We think this bug can only be triggered by modifying a
3581 local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha.
3583 o Minor bugfixes (directory authority, backport from 0.4.1.2-alpha):
3584 - Move the "bandwidth-file-headers" line in directory authority
3585 votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix
3588 o Minor bugfixes (error handling, backport from 0.4.2.1-alpha):
3589 - On abort, try harder to flush the output buffers of log messages.
3590 On some platforms (macOS), log messages could be discarded when
3591 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
3592 - Report the tor version whenever an assertion fails. Previously, we
3593 only reported the Tor version on some crashes, and some non-fatal
3594 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
3596 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha):
3597 - When extracting an IPv6 address from a PF-based proxy, verify that
3598 we are actually configured to receive an IPv6 address, and log an
3599 internal error if not. Fixes part of bug 31687; bugfix
3602 o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
3603 - When tor is missing descriptors for some primary entry guards,
3604 make the log message less alarming. It's normal for descriptors to
3605 expire, as long as tor fetches new ones soon after. Fixes bug
3606 31657; bugfix on 0.3.3.1-alpha.
3608 o Minor bugfixes (logging, backport from 0.4.1.1-alpha):
3609 - Do not log a warning when running with an OpenSSL version other
3610 than the one Tor was compiled with, if the two versions should be
3611 compatible. Previously, we would warn whenever the version was
3612 different. Fixes bug 30190; bugfix on 0.2.4.2-alpha.
3614 o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
3615 - Change log level of message "Hash of session info was not as
3616 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
3619 o Minor bugfixes (logging, backport from 0.4.2.2-alpha):
3620 - Rate-limit our the logging message about the obsolete .exit
3621 notation. Previously, there was no limit on this warning, which
3622 could potentially be triggered many times by a hostile website.
3623 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
3625 o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha):
3626 - Do not log a nonfatal assertion failure when receiving a VERSIONS
3627 cell on a connection using the obsolete v1 link protocol. Log a
3628 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
3630 o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha):
3631 - Reset the periodic events' "enabled" flag when Tor is shut down
3632 cleanly. Previously, this flag was left on, which caused periodic
3633 events not to be re-enabled when Tor was relaunched in-process
3634 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
3637 o Minor bugfixes (memory leak, backport from 0.4.1.1-alpha):
3638 - Avoid a minor memory leak that could occur on relays when failing
3639 to create a "keys" directory. Fixes bug 30148; bugfix
3642 o Minor bugfixes (memory leak, backport from 0.4.1.4-rc):
3643 - Fix a trivial memory leak when parsing an invalid value
3644 from a download schedule in the configuration. Fixes bug
3645 30894; bugfix on 0.3.4.1-alpha.
3647 o Minor bugfixes (NetBSD, backport from 0.4.1.2-alpha):
3648 - Fix usage of minherit() on NetBSD and other platforms that define
3649 MAP_INHERIT_{ZERO,NONE} instead of INHERIT_{ZERO,NONE}. Fixes bug
3650 30614; bugfix on 0.4.0.2-alpha. Patch from Taylor Campbell.
3652 o Minor bugfixes (onion services, backport from 0.4.1.1-alpha):
3653 - Avoid a GCC 9.1.1 warning (and possible crash depending on libc
3654 implemenation) when failing to load an onion service client
3655 authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha.
3657 o Minor bugfixes (out-of-memory handler, backport from 0.4.1.2-alpha):
3658 - When purging the DNS cache because of an out-of-memory condition,
3659 try purging just the older entries at first. Previously, we would
3660 always purge the whole thing. Fixes bug 29617; bugfix
3663 o Minor bugfixes (portability, backport from 0.4.1.2-alpha):
3664 - Avoid crashing in our tor_vasprintf() implementation on systems
3665 that define neither vasprintf() nor _vscprintf(). (This bug has
3666 been here long enough that we question whether people are running
3667 Tor on such systems, but we're applying the fix out of caution.)
3668 Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by
3671 o Minor bugfixes (process management, backport from 0.4.2.3-alpha):
3672 - Remove overly strict assertions that triggered when a pluggable
3673 transport failed to launch. Fixes bug 31091; bugfix
3675 - Remove an assertion in the Unix process backend. This assertion
3676 would trigger when we failed to find the executable for a child
3677 process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.
3679 o Minor bugfixes (relay, backport from 0.4.2.2-alpha):
3680 - Avoid crashing when starting with a corrupt keys directory where
3681 the old ntor key and the new ntor key are identical. Fixes bug
3682 30916; bugfix on 0.2.4.8-alpha.
3684 o Minor bugfixes (rust, backport from 0.4.2.1-alpha):
3685 - Correctly exclude a redundant rust build job in Travis. Fixes bug
3686 31463; bugfix on 0.3.5.4-alpha.
3688 o Minor bugfixes (testing, backport from 0.4.2.3-alpha):
3689 - When testing port rebinding, don't busy-wait for tor to log.
3690 Instead, actually sleep for a short time before polling again.
3691 Also improve the formatting of control commands and log messages.
3692 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
3694 o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha):
3695 - Log bugs about the TLS read buffer's length only once, rather than
3696 filling the logs with similar warnings. Fixes bug 31939; bugfix
3699 o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
3700 - Always retry v2 single onion service intro and rend circuits with
3701 a 3-hop path. Previously, v2 single onion services used a 3-hop
3702 path when rendezvous circuits were retried after a remote or
3703 delayed failure, but a 1-hop path for immediate retries. Fixes bug
3704 23818; bugfix on 0.2.9.3-alpha.
3705 - Make v3 single onion services fall back to a 3-hop intro, when all
3706 intro points are unreachable via a 1-hop path. Previously, v3
3707 single onion services failed when all intro nodes were unreachable
3708 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
3710 o Documentation (backport from 0.4.2.1-alpha):
3711 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
3712 notice.html so that operators no longer have to host it
3713 themselves. Closes ticket 31089.
3715 o Testing (backport from 0.4.1.2-alpha):
3716 - Specify torrc paths (with empty files) when launching tor in
3717 integration tests; refrain from reading user and system torrcs.
3718 Resolves issue 29702.
3720 o Testing (continuous integration, backport from 0.4.1.1-alpha):
3721 - In Travis, show stem's tor log after failure. Closes ticket 30234.
3723 o Testing (continuous integration, backport from 0.4.1.5):
3724 - In Travis, make stem log a controller trace to the console, and
3725 tail stem's tor log after failure. Closes ticket 30591.
3726 - In Travis, only run the stem tests that use a tor binary. Closes
3729 o Testing (continuous integration, backport from 0.4.2.3-alpha):
3730 - Disable all but one Travis CI macOS build, to mitigate slow
3731 scheduling of Travis macOS jobs. Closes ticket 32177.
3732 - Run the chutney IPv6 networks as part of Travis CI. Closes
3734 - Simplify the Travis CI build matrix, and optimise for build time.
3735 Closes ticket 31859.
3736 - Use Windows Server 2019 instead of Windows Server 2016 in our
3737 Appveyor builds. Closes ticket 32086.
3739 o Testing (continuous integration, backport from 0.4.2.4-rc):
3740 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
3741 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
3742 until we can fix some Bionic permissions issues (see ticket
3743 32240). Related to ticket 31919.
3744 - Install the mingw OpenSSL package in Appveyor. This makes sure
3745 that the OpenSSL headers and libraries match in Tor's Appveyor
3746 builds. (This bug was triggered by an Appveyor image update.)
3747 Fixes bug 32449; bugfix on 0.3.5.6-rc.
3748 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
3750 o Testing (continuous integration, backport from 0.4.2.5):
3751 - Require C99 standards-conforming code in Travis CI, but allow GNU gcc
3752 extensions. Also activates clang's -Wtypedef-redefinition warnings.
3753 Build some jobs with -std=gnu99, and some jobs without.
3754 Closes ticket 32500.
3756 Changes in version 0.3.5.9 - 2019-12-09
3757 Tor 0.3.5.9 backports serveral fixes from later releases, including
3758 several that affect bridge users, relay stability, onion services,
3761 o Directory authority changes (backport from 0.4.1.5):
3762 - The directory authority "dizum" has a new IP address. Closes
3765 o Major bugfixes (bridges, backport from 0.4.1.2-alpha):
3766 - Consider our directory information to have changed when our list
3767 of bridges changes. Previously, Tor would not re-compute the
3768 status of its directory information when bridges changed, and
3769 therefore would not realize that it was no longer able to build
3770 circuits. Fixes part of bug 29875.
3771 - Do not count previously configured working bridges towards our
3772 total of working bridges. Previously, when Tor's list of bridges
3773 changed, it would think that the old bridges were still usable,
3774 and delay fetching router descriptors for the new ones. Fixes part
3775 of bug 29875; bugfix on 0.3.0.1-alpha.
3777 o Major bugfixes (circuit build, guard, backport from 0.4.1.4-rc):
3778 - When considering upgrading circuits from "waiting for guard" to
3779 "open", always ignore circuits that are marked for close. Otherwise,
3780 we can end up in the situation where a subsystem is notified that
3781 a closing circuit has just opened, leading to undesirable
3782 behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha.
3784 o Major bugfixes (NSS, relay, backport from 0.4.0.4-rc):
3785 - When running with NSS, disable TLS 1.2 ciphersuites that use
3786 SHA384 for their PRF. Due to an NSS bug, the TLS key exporters for
3787 these ciphersuites don't work -- which caused relays to fail to
3788 handshake with one another when these ciphersuites were enabled.
3789 Fixes bug 29241; bugfix on 0.3.5.1-alpha.
3791 o Major bugfixes (Onion service reachability, backport from 0.4.1.3-alpha):
3792 - Properly clean up the introduction point map when circuits change
3793 purpose from onion service circuits to pathbias, measurement, or
3794 other circuit types. This should fix some service-side instances
3795 of introduction point failure. Fixes bug 29034; bugfix
3798 o Major bugfixes (onion service v3, backport from 0.4.1.1-alpha):
3799 - Fix an unreachable bug in which an introduction point could try to
3800 send an INTRODUCE_ACK with a status code that Trunnel would refuse
3801 to encode, leading the relay to assert(). We've consolidated the
3802 ABI values into Trunnel now. Fixes bug 30454; bugfix
3804 - Clients can now handle unknown status codes from INTRODUCE_ACK
3805 cells. (The NACK behavior will stay the same.) This will allow us
3806 to extend status codes in the future without breaking the normal
3807 client behavior. Fixes another part of bug 30454; bugfix
3810 o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha):
3811 - Stop ignoring torrc options after an %include directive, when the
3812 included directory ends with a file that does not contain any
3813 config options (but does contain comments or whitespace). Fixes
3814 bug 31408; bugfix on 0.3.1.1-alpha.
3816 o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha):
3817 - Onion services now always use the exact number of intro points
3818 configured with the HiddenServiceNumIntroductionPoints option (or
3819 fewer if nodes are excluded). Before, a service could sometimes
3820 pick more intro points than configured. Fixes bug 31548; bugfix
3823 o Minor features (address selection, backport from 0.4.0.3-alpha):
3824 - Treat the subnet 100.64.0.0/10 as public for some purposes;
3825 private for others. This subnet is the RFC 6598 (Carrier Grade
3826 NAT) IP range, and is deployed by many ISPs as an alternative to
3827 RFC 1918 that does not break existing internal networks. Tor now
3828 blocks SOCKS and control ports on these addresses and warns users
3829 if client ports or ExtORPorts are listening on a RFC 6598 address.
3830 Closes ticket 28525. Patch by Neel Chauhan.
3832 o Minor features (bandwidth authority, backport from 0.4.0.4-rc):
3833 - Make bandwidth authorities ignore relays that are reported in the
3834 bandwidth file with the flag "vote=0". This change allows us to
3835 report unmeasured relays for diagnostic reasons without including
3836 their bandwidth in the bandwidth authorities' vote. Closes
3839 o Minor features (compile-time modules, backport from version 0.4.1.1-alpha):
3840 - Add a "--list-modules" command to print a list of which compile-
3841 time modules are enabled. Closes ticket 30452.
3843 o Minor features (continuous integration, backport from 0.4.0.4-rc):
3844 - On Travis Rust builds, cleanup Rust registry and refrain from
3845 caching the "target/" directory to speed up builds. Resolves
3848 o Minor features (continuous integration, backport from 0.4.0.5):
3849 - In Travis, tell timelimit to use stem's backtrace signals, and
3850 launch python directly from timelimit, so python receives the
3851 signals from timelimit, rather than make. Closes ticket 30117.
3853 o Minor features (continuous integration, backport from 0.4.1.1-alpha):
3854 - Remove sudo configuration lines from .travis.yml as they are no
3855 longer needed with current Travis build environment. Resolves
3858 o Minor features (continuous integration, backport from 0.4.1.4-rc):
3859 - Our Travis configuration now uses Chutney to run some network
3860 integration tests automatically. Closes ticket 29280.
3862 o Minor features (continuous integration, backport from 0.4.2.2-alpha):
3863 - When building on Appveyor and Travis, pass the "-k" flag to make,
3864 so that we are informed of all compilation failures, not just the
3865 first one or two. Closes ticket 31372.
3867 o Minor features (fallback directory list, backport from 0.4.1.4-rc):
3868 - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc
3869 in December 2018 (of which ~122 were still functional), with a
3870 list of 148 fallbacks (70 new, 78 existing, 79 removed) generated
3871 in June 2019. Closes ticket 28795.
3873 o Minor features (geoip, backport from 0.4.2.5):
3874 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
3875 Country database. Closes ticket 32685.
3877 o Minor features (NSS, diagnostic, backport from 0.4.0.4-rc):
3878 - Try to log an error from NSS (if there is any) and a more useful
3879 description of our situation if we are using NSS and a call to
3880 SSL_ExportKeyingMaterial() fails. Diagnostic for ticket 29241.
3882 o Minor features (stem tests, backport from 0.4.2.1-alpha):
3883 - Change "make test-stem" so it only runs the stem tests that use
3884 tor. This change makes test-stem faster and more reliable. Closes
3887 o Minor bugfixes (security, backport from 0.4.0.4-rc):
3888 - Verify in more places that we are not about to create a buffer
3889 with more than INT_MAX bytes, to avoid possible OOB access in the
3890 event of bugs. Fixes bug 30041; bugfix on 0.2.0.16. Found and
3891 fixed by Tobias Stoeckmann.
3892 - Fix a potential double free bug when reading huge bandwidth files.
3893 The issue is not exploitable in the current Tor network because
3894 the vulnerable code is only reached when directory authorities
3895 read bandwidth files, but bandwidth files come from a trusted
3896 source (usually the authorities themselves). Furthermore, the
3897 issue is only exploitable in rare (non-POSIX) 32-bit architectures,
3898 which are not used by any of the current authorities. Fixes bug
3899 30040; bugfix on 0.3.5.1-alpha. Bug found and fixed by
3902 o Minor bugfix (continuous integration, backport from 0.4.0.4-rc):
3903 - Reset coverage state on disk after Travis CI has finished. This
3904 should prevent future coverage merge errors from causing the test
3905 suite for the "process" subsystem to fail. The process subsystem
3906 was introduced in 0.4.0.1-alpha. Fixes bug 29036; bugfix
3908 - Terminate test-stem if it takes more than 9.5 minutes to run.
3909 (Travis terminates the job after 10 minutes of no output.)
3910 Diagnostic for 29437. Fixes bug 30011; bugfix on 0.3.5.4-alpha.
3912 o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha):
3913 - Avoid spurious errors when Appveyor CI fails before the install step.
3914 Fixes bug 31884; bugfix on 0.3.4.2-alpha.
3916 o Minor bugfixes (build system, backport form 0.4.2.1-alpha):
3917 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
3918 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
3920 o Minor bugfixes (C correctness, backport from 0.4.0.4-rc):
3921 - Fix an unlikely memory leak in consensus_diff_apply(). Fixes bug
3922 29824; bugfix on 0.3.1.1-alpha. This is Coverity warning
3925 o Minor bugfixes (circuit isolation, backport from 0.4.1.3-alpha):
3926 - Fix a logic error that prevented the SessionGroup sub-option from
3927 being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha.
3929 o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc):
3930 - Fix a BUG() assertion that occurs within a very small race window
3931 between when a client intro circuit opens and when its descriptor
3932 gets cleaned up from the cache. The circuit is now closed early,
3933 which will trigger a re-fetch of the descriptor and continue the
3934 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
3936 o Minor bugfixes (clock skew detection, backport from 0.4.1.5):
3937 - Don't believe clock skew results from NETINFO cells that appear to
3938 arrive before we sent the VERSIONS cells they are responding to.
3939 Previously, we would accept them up to 3 minutes "in the past".
3940 Fixes bug 31343; bugfix on 0.2.4.4-alpha.
3942 o Minor bugfixes (compilation warning, backport from 0.4.1.5):
3943 - Fix a compilation warning on Windows about casting a function
3944 pointer for GetTickCount64(). Fixes bug 31374; bugfix
3947 o Minor bugfixes (compilation, backport from 0.4.0.2-alpha):
3948 - Silence a compiler warning in test-memwipe.c on OpenBSD. Fixes bug
3949 29145; bugfix on 0.2.9.3-alpha. Patch from Kris Katterjohn.
3951 o Minor bugfixes (compilation, backport from 0.4.1.5):
3952 - Avoid using labs() on time_t, which can cause compilation warnings
3953 on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
3955 o Minor bugfixes (compilation, backport from 0.4.2.1-alpha):
3956 - Suppress spurious float-conversion warnings from GCC when calling
3957 floating-point classifier functions on FreeBSD. Fixes part of bug
3958 31687; bugfix on 0.3.1.5-alpha.
3960 o Minor bugfixes (compilation, unusual configurations, backport from 0.4.1.1-alpha):
3961 - Avoid failures when building with the ALL_BUGS_ARE_FATAL option
3962 due to missing declarations of abort(), and prevent other such
3963 failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.
3965 o Minor bugfixes (configuration, proxies, backport from 0.4.1.2-alpha):
3966 - Fix a bug that prevented us from supporting SOCKS5 proxies that
3967 want authentication along with configured (but unused!)
3968 ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.
3970 o Minor bugfixes (connections, backport from 0.4.2.3-rc):
3971 - Avoid trying to read data from closed connections, which can cause
3972 needless loops in Libevent and infinite loops in Shadow. Fixes bug
3973 30344; bugfix on 0.1.1.1-alpha.
3975 o Minor bugfixes (continuous integration, backport from 0.4.1.3-alpha):
3976 - Allow the test-stem job to fail in Travis, because it sometimes
3977 hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha.
3978 - Skip test_rebind on macOS in Travis, because it is unreliable on
3979 macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
3980 - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment
3981 variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
3983 o Minor bugfixes (crash on exit, backport from 0.4.1.4-rc):
3984 - Avoid a set of possible code paths that could try to use freed
3985 memory in routerlist_free() while Tor was exiting. Fixes bug
3986 31003; bugfix on 0.1.2.2-alpha.
3988 o Minor bugfixes (directory authorities, backport from 0.4.1.3-alpha):
3989 - Stop crashing after parsing an unknown descriptor purpose
3990 annotation. We think this bug can only be triggered by modifying a
3991 local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha.
3993 o Minor bugfixes (directory authority, backport from 0.4.1.2-alpha):
3994 - Move the "bandwidth-file-headers" line in directory authority
3995 votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix
3998 o Minor bugfixes (error handling, backport from 0.4.2.1-alpha):
3999 - On abort, try harder to flush the output buffers of log messages.
4000 On some platforms (macOS), log messages could be discarded when
4001 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
4002 - Report the tor version whenever an assertion fails. Previously, we
4003 only reported the Tor version on some crashes, and some non-fatal
4004 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
4006 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha):
4007 - When extracting an IPv6 address from a PF-based proxy, verify that
4008 we are actually configured to receive an IPv6 address, and log an
4009 internal error if not. Fixes part of bug 31687; bugfix
4012 o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
4013 - When tor is missing descriptors for some primary entry guards,
4014 make the log message less alarming. It's normal for descriptors to
4015 expire, as long as tor fetches new ones soon after. Fixes bug
4016 31657; bugfix on 0.3.3.1-alpha.
4018 o Minor bugfixes (logging, backport from 0.4.0.2-alpha):
4019 - Avoid logging that we are relaxing a circuit timeout when that
4020 timeout is fixed. Fixes bug 28698; bugfix on 0.2.4.7-alpha.
4022 o Minor bugfixes (logging, backport from 0.4.0.3-alpha):
4023 - Correct a misleading error message when IPv4Only or IPv6Only is
4024 used but the resolved address can not be interpreted as an address
4025 of the specified IP version. Fixes bug 13221; bugfix on
4026 0.2.3.9-alpha. Patch from Kris Katterjohn.
4027 - Log the correct port number for listening sockets when "auto" is
4028 used to let Tor pick the port number. Previously, port 0 was
4029 logged instead of the actual port number. Fixes bug 29144; bugfix
4030 on 0.3.5.1-alpha. Patch from Kris Katterjohn.
4031 - Stop logging a BUG() warning when Tor is waiting for exit
4032 descriptors. Fixes bug 28656; bugfix on 0.3.5.1-alpha.
4034 o Minor bugfixes (logging, backport from 0.4.1.1-alpha):
4035 - Do not log a warning when running with an OpenSSL version other
4036 than the one Tor was compiled with, if the two versions should be
4037 compatible. Previously, we would warn whenever the version was
4038 different. Fixes bug 30190; bugfix on 0.2.4.2-alpha.
4040 o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
4041 - Change log level of message "Hash of session info was not as
4042 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
4045 o Minor bugfixes (logging, backport from 0.4.2.2-alpha):
4046 - Rate-limit our the logging message about the obsolete .exit
4047 notation. Previously, there was no limit on this warning, which
4048 could potentially be triggered many times by a hostile website.
4049 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
4051 o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha):
4052 - Do not log a nonfatal assertion failure when receiving a VERSIONS
4053 cell on a connection using the obsolete v1 link protocol. Log a
4054 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
4056 o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha):
4057 - Reset the periodic events' "enabled" flag when Tor is shut down
4058 cleanly. Previously, this flag was left on, which caused periodic
4059 events not to be re-enabled when Tor was relaunched in-process
4060 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
4063 o Minor bugfixes (memory leak, backport from 0.4.1.1-alpha):
4064 - Avoid a minor memory leak that could occur on relays when failing
4065 to create a "keys" directory. Fixes bug 30148; bugfix
4068 o Minor bugfixes (memory leak, backport from 0.4.1.4-rc):
4069 - Fix a trivial memory leak when parsing an invalid value
4070 from a download schedule in the configuration. Fixes bug
4071 30894; bugfix on 0.3.4.1-alpha.
4073 o Minor bugfixes (memory management, backport from 0.4.0.3-alpha):
4074 - Refactor the shared random state's memory management so that it
4075 actually takes ownership of the shared random value pointers.
4076 Fixes bug 29706; bugfix on 0.2.9.1-alpha.
4078 o Minor bugfixes (memory management, testing, backport from 0.4.0.3-alpha):
4079 - Stop leaking parts of the shared random state in the shared-random
4080 unit tests. Fixes bug 29599; bugfix on 0.2.9.1-alpha.
4082 o Minor bugfixes (onion services, backport from 0.4.1.1-alpha):
4083 - Avoid a GCC 9.1.1 warning (and possible crash depending on libc
4084 implemenation) when failing to load an onion service client
4085 authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha.
4087 o Minor bugfixes (out-of-memory handler, backport from 0.4.1.2-alpha):
4088 - When purging the DNS cache because of an out-of-memory condition,
4089 try purging just the older entries at first. Previously, we would
4090 always purge the whole thing. Fixes bug 29617; bugfix
4093 o Minor bugfixes (portability, backport from 0.4.1.2-alpha):
4094 - Avoid crashing in our tor_vasprintf() implementation on systems
4095 that define neither vasprintf() nor _vscprintf(). (This bug has
4096 been here long enough that we question whether people are running
4097 Tor on such systems, but we're applying the fix out of caution.)
4098 Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by
4101 o Minor bugfixes (relay, backport from 0.4.2.2-alpha):
4102 - Avoid crashing when starting with a corrupt keys directory where
4103 the old ntor key and the new ntor key are identical. Fixes bug
4104 30916; bugfix on 0.2.4.8-alpha.
4106 o Minor bugfixes (rust, backport from 0.4.0.5):
4107 - Abort on panic in all build profiles, instead of potentially
4108 unwinding into C code. Fixes bug 27199; bugfix on 0.3.3.1-alpha.
4110 o Minor bugfixes (rust, backport from 0.4.2.1-alpha):
4111 - Correctly exclude a redundant rust build job in Travis. Fixes bug
4112 31463; bugfix on 0.3.5.4-alpha.
4114 o Minor bugfixes (single onion services, backport from 0.4.0.3-alpha):
4115 - Allow connections to single onion services to remain idle without
4116 being disconnected. Previously, relays acting as rendezvous points
4117 for single onion services were mistakenly closing idle rendezvous
4118 circuits after 60 seconds, thinking that they were unused
4119 directory-fetching circuits that had served their purpose. Fixes
4120 bug 29665; bugfix on 0.2.1.26.
4122 o Minor bugfixes (stats, backport from 0.4.0.3-alpha):
4123 - When ExtraInfoStatistics is 0, stop including PaddingStatistics in
4124 relay and bridge extra-info documents. Fixes bug 29017; bugfix
4127 o Minor bugfixes (testing, backport from 0.4.0.3-alpha):
4128 - Downgrade some LOG_ERR messages in the address/* tests to
4129 warnings. The LOG_ERR messages were occurring when we had no
4130 configured network. We were failing the unit tests, because we
4131 backported 28668 to 0.3.5.8, but did not backport 29530. Fixes bug
4132 29530; bugfix on 0.3.5.8.
4133 - Fix our gcov wrapper script to look for object files at the
4134 correct locations. Fixes bug 29435; bugfix on 0.3.5.1-alpha.
4136 o Minor bugfixes (testing, backport from 0.4.0.4-rc):
4137 - Backport the 0.3.4 src/test/test-network.sh to 0.2.9. We need a
4138 recent test-network.sh to use new chutney features in CI. Fixes
4139 bug 29703; bugfix on 0.2.9.1-alpha.
4140 - Fix a test failure on Windows caused by an unexpected "BUG"
4141 warning in our tests for tor_gmtime_r(-1). Fixes bug 29922; bugfix
4144 o Minor bugfixes (testing, backport from 0.4.2.3-alpha):
4145 - When testing port rebinding, don't busy-wait for tor to log.
4146 Instead, actually sleep for a short time before polling again.
4147 Also improve the formatting of control commands and log messages.
4148 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
4150 o Minor bugfixes (TLS protocol, backport form 0.4.0.4-rc):
4151 - When classifying a client's selection of TLS ciphers, if the
4152 client ciphers are not yet available, do not cache the result.
4153 Previously, we had cached the unavailability of the cipher list
4154 and never looked again, which in turn led us to assume that the
4155 client only supported the ancient V1 link protocol. This, in turn,
4156 was causing Stem integration tests to stall in some cases. Fixes
4157 bug 30021; bugfix on 0.2.4.8-alpha.
4159 o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha):
4160 - Log bugs about the TLS read buffer's length only once, rather than
4161 filling the logs with similar warnings. Fixes bug 31939; bugfix
4164 o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
4165 - Always retry v2 single onion service intro and rend circuits with
4166 a 3-hop path. Previously, v2 single onion services used a 3-hop
4167 path when rendezvous circuits were retried after a remote or
4168 delayed failure, but a 1-hop path for immediate retries. Fixes bug
4169 23818; bugfix on 0.2.9.3-alpha.
4170 - Make v3 single onion services fall back to a 3-hop intro, when all
4171 intro points are unreachable via a 1-hop path. Previously, v3
4172 single onion services failed when all intro nodes were unreachable
4173 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
4175 o Minor bugfixes (Windows, CI, backport from 0.4.0.3-alpha):
4176 - Skip the Appveyor 32-bit Windows Server 2016 job, and 64-bit
4177 Windows Server 2012 R2 job. The remaining 2 jobs still provide
4178 coverage of 64/32-bit, and Windows Server 2016/2012 R2. Also set
4179 fast_finish, so failed jobs terminate the build immediately. Fixes
4180 bug 29601; bugfix on 0.3.5.4-alpha.
4182 o Documentation (backport from 0.4.2.1-alpha):
4183 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
4184 notice.html so that operators no longer have to host it
4185 themselves. Closes ticket 31089.
4187 o Testing (backport from 0.4.1.2-alpha):
4188 - Specify torrc paths (with empty files) when launching tor in
4189 integration tests; refrain from reading user and system torrcs.
4190 Resolves issue 29702.
4192 o Testing (continuous integration, backport from 0.4.1.1-alpha):
4193 - In Travis, show stem's tor log after failure. Closes ticket 30234.
4195 o Testing (continuous integration, backport from 0.4.1.5):
4196 - In Travis, make stem log a controller trace to the console, and
4197 tail stem's tor log after failure. Closes ticket 30591.
4198 - In Travis, only run the stem tests that use a tor binary. Closes
4201 o Testing (continuous integration, backport from 0.4.2.3-alpha):
4202 - Disable all but one Travis CI macOS build, to mitigate slow
4203 scheduling of Travis macOS jobs. Closes ticket 32177.
4204 - Run the chutney IPv6 networks as part of Travis CI. Closes
4206 - Simplify the Travis CI build matrix, and optimise for build time.
4207 Closes ticket 31859.
4208 - Use Windows Server 2019 instead of Windows Server 2016 in our
4209 Appveyor builds. Closes ticket 32086.
4211 o Testing (continuous integration, backport from 0.4.2.4-rc):
4212 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
4213 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
4214 until we can fix some Bionic permissions issues (see ticket
4215 32240). Related to ticket 31919.
4216 - Install the mingw OpenSSL package in Appveyor. This makes sure
4217 that the OpenSSL headers and libraries match in Tor's Appveyor
4218 builds. (This bug was triggered by an Appveyor image update.)
4219 Fixes bug 32449; bugfix on 0.3.5.6-rc.
4220 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
4222 o Testing (continuous integration, backport from 0.4.2.5):
4223 - Require C99 standards-conforming code in Travis CI, but allow GNU gcc
4224 extensions. Also activates clang's -Wtypedef-redefinition warnings.
4225 Build some jobs with -std=gnu99, and some jobs without.
4226 Closes ticket 32500.
4228 Changes in version 0.4.2.4-rc - 2019-11-15
4229 Tor 0.4.2.4-rc is the first release candidate in its series. It fixes
4230 several bugs from earlier versions, including a few that would result in
4231 stack traces or incorrect behavior.
4233 o Minor features (build system):
4234 - Make pkg-config use --prefix when cross-compiling, if
4235 PKG_CONFIG_PATH is not set. Closes ticket 32191.
4237 o Minor features (geoip):
4238 - Update geoip and geoip6 to the November 6 2019 Maxmind GeoLite2
4239 Country database. Closes ticket 32440.
4241 o Minor bugfixes (client, onion service v3):
4242 - Fix a BUG() assertion that occurs within a very small race window
4243 between when a client intro circuit opens and when its descriptor
4244 gets cleaned up from the cache. The circuit is now closed early,
4245 which will trigger a re-fetch of the descriptor and continue the
4246 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
4248 o Minor bugfixes (code quality):
4249 - Fix "make check-includes" so it runs correctly on out-of-tree
4250 builds. Fixes bug 31335; bugfix on 0.3.5.1-alpha.
4252 o Minor bugfixes (configuration):
4253 - Log the option name when skipping an obsolete option. Fixes bug
4254 32295; bugfix on 0.4.2.1-alpha.
4256 o Minor bugfixes (crash):
4257 - When running Tor with an option like --verify-config or
4258 --dump-config that does not start the event loop, avoid crashing
4259 if we try to exit early because of an error. Fixes bug 32407;
4260 bugfix on 0.3.3.1-alpha.
4262 o Minor bugfixes (directory):
4263 - When checking if a directory connection is anonymous, test if the
4264 circuit was marked for close before looking at its channel. This
4265 avoids a BUG() stacktrace if the circuit was previously closed.
4266 Fixes bug 31958; bugfix on 0.4.2.1-alpha.
4268 o Minor bugfixes (shellcheck):
4269 - Fix minor shellcheck errors in the git-*.sh scripts. Fixes bug
4270 32402; bugfix on 0.4.2.1-alpha.
4271 - Start checking most scripts for shellcheck errors again. Fixes bug
4272 32402; bugfix on 0.4.2.1-alpha.
4274 o Testing (continuous integration):
4275 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
4276 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
4277 until we can fix some Bionic permissions issues (see ticket
4278 32240). Related to ticket 31919.
4279 - Install the mingw OpenSSL package in Appveyor. This makes sure
4280 that the OpenSSL headers and libraries match in Tor's Appveyor
4281 builds. (This bug was triggered by an Appveyor image update.)
4282 Fixes bug 32449; bugfix on 0.3.5.6-rc.
4283 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
4286 Changes in version 0.4.2.3-alpha - 2019-10-24
4287 This release fixes several bugs from the previous alpha release, and
4288 from earlier versions of Tor.
4290 o Major bugfixes (relay):
4291 - Relays now respect their AccountingMax bandwidth again. When
4292 relays entered "soft" hibernation (which typically starts when
4293 we've hit 90% of our AccountingMax), we had stopped checking
4294 whether we should enter hard hibernation. Soft hibernation refuses
4295 new connections and new circuits, but the existing circuits can
4296 continue, meaning that relays could have exceeded their configured
4297 AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.
4299 o Major bugfixes (v3 onion services):
4300 - Onion services now always use the exact number of intro points
4301 configured with the HiddenServiceNumIntroductionPoints option (or
4302 fewer if nodes are excluded). Before, a service could sometimes
4303 pick more intro points than configured. Fixes bug 31548; bugfix
4306 o Minor feature (onion services, control port):
4307 - The ADD_ONION command's keyword "BEST" now defaults to ED25519-V3
4308 (v3) onion services. Previously it defaulted to RSA1024 (v2).
4309 Closes ticket 29669.
4311 o Minor features (testing):
4312 - When running tests that attempt to look up hostnames, replace the
4313 libc name lookup functions with ones that do not actually touch
4314 the network. This way, the tests complete more quickly in the
4315 presence of a slow or missing DNS resolver. Closes ticket 31841.
4317 o Minor features (testing, continuous integration):
4318 - Disable all but one Travis CI macOS build, to mitigate slow
4319 scheduling of Travis macOS jobs. Closes ticket 32177.
4320 - Run the chutney IPv6 networks as part of Travis CI. Closes
4322 - Simplify the Travis CI build matrix, and optimise for build time.
4323 Closes ticket 31859.
4324 - Use Windows Server 2019 instead of Windows Server 2016 in our
4325 Appveyor builds. Closes ticket 32086.
4327 o Minor bugfixes (build system):
4328 - Interpret "--disable-module-dirauth=no" correctly. Fixes bug
4329 32124; bugfix on 0.3.4.1-alpha.
4330 - Interpret "--with-tcmalloc=no" correctly. Fixes bug 32124; bugfix
4332 - Stop failing when jemalloc is requested, but tcmalloc is not
4333 found. Fixes bug 32124; bugfix on 0.3.5.1-alpha.
4334 - When pkg-config is not installed, or a library that depends on
4335 pkg-config is not found, tell the user what to do to fix the
4336 problem. Fixes bug 31922; bugfix on 0.3.1.1-alpha.
4338 o Minor bugfixes (connections):
4339 - Avoid trying to read data from closed connections, which can cause
4340 needless loops in Libevent and infinite loops in Shadow. Fixes bug
4341 30344; bugfix on 0.1.1.1-alpha.
4343 o Minor bugfixes (error handling):
4344 - Always lock the backtrace buffer before it is used. Fixes bug
4345 31734; bugfix on 0.2.5.3-alpha.
4347 o Minor bugfixes (mainloop, periodic events, in-process API):
4348 - Reset the periodic events' "enabled" flag when Tor is shut down
4349 cleanly. Previously, this flag was left on, which caused periodic
4350 events not to be re-enabled when Tor was relaunched in-process
4351 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
4354 o Minor bugfixes (process management):
4355 - Remove overly strict assertions that triggered when a pluggable
4356 transport failed to launch. Fixes bug 31091; bugfix
4358 - Remove an assertion in the Unix process backend. This assertion
4359 would trigger when we failed to find the executable for a child
4360 process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.
4362 o Minor bugfixes (testing):
4363 - Avoid intermittent test failures due to a test that had relied on
4364 inconsistent timing sources. Fixes bug 31995; bugfix
4366 - When testing port rebinding, don't busy-wait for tor to log.
4367 Instead, actually sleep for a short time before polling again.
4368 Also improve the formatting of control commands and log messages.
4369 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
4371 o Minor bugfixes (tls, logging):
4372 - Log bugs about the TLS read buffer's length only once, rather than
4373 filling the logs with similar warnings. Fixes bug 31939; bugfix
4376 o Minor bugfixes (v3 onion services):
4377 - Fix an implicit conversion from ssize_t to size_t discovered by
4378 Coverity. Fixes bug 31682; bugfix on 0.4.2.1-alpha.
4379 - Fix a memory leak in an unlikely error code path when encoding HS
4380 DoS establish intro extension cell. Fixes bug 32063; bugfix
4382 - When cleaning up intro circuits for a v3 onion service, don't
4383 remove circuits that have an established or pending circuit, even
4384 if they ran out of retries. This way, we don't remove a circuit on
4385 its last retry. Fixes bug 31652; bugfix on 0.3.2.1-alpha.
4388 - Correct the description of "GuardLifetime". Fixes bug 31189;
4389 bugfix on 0.3.0.1-alpha.
4390 - Make clear in the man page, in both the bandwidth section and the
4391 AccountingMax section, that Tor counts in powers of two, not
4392 powers of ten: 1 GByte is 1024*1024*1024 bytes, not one billion
4393 bytes. Resolves ticket 32106.
4396 Changes in version 0.4.2.2-alpha - 2019-10-07
4397 This release fixes several bugs from the previous alpha release, and
4398 from earlier versions. It also includes a change in authorities, so
4399 that they begin to reject the currently unsupported release series.
4401 o Major features (directory authorities):
4402 - Directory authorities now reject relays running all currently
4403 deprecated release series. The currently supported release series
4404 are: 0.2.9, 0.3.5, 0.4.0, 0.4.1, and 0.4.2. Closes ticket 31549.
4406 o Major bugfixes (embedded Tor):
4407 - Avoid a possible crash when restarting Tor in embedded mode and
4408 enabling a different set of publish/subscribe messages. Fixes bug
4409 31898; bugfix on 0.4.1.1-alpha.
4411 o Major bugfixes (torrc parsing):
4412 - Stop ignoring torrc options after an %include directive, when the
4413 included directory ends with a file that does not contain any
4414 config options (but does contain comments or whitespace). Fixes
4415 bug 31408; bugfix on 0.3.1.1-alpha.
4417 o Minor features (auto-formatting scripts):
4418 - When annotating C macros, never generate a line that our check-
4419 spaces script would reject. Closes ticket 31759.
4420 - When annotating C macros, try to remove cases of double-negation.
4421 Closes ticket 31779.
4423 o Minor features (continuous integration):
4424 - When building on Appveyor and Travis, pass the "-k" flag to make,
4425 so that we are informed of all compilation failures, not just the
4426 first one or two. Closes ticket 31372.
4428 o Minor features (geoip):
4429 - Update geoip and geoip6 to the October 1 2019 Maxmind GeoLite2
4430 Country database. Closes ticket 31931.
4432 o Minor features (maintenance scripts):
4433 - Add a Coccinelle script to detect bugs caused by incrementing or
4434 decrementing a variable inside a call to log_debug(). Since
4435 log_debug() is a macro whose arguments are conditionally
4436 evaluated, it is usually an error to do this. One such bug was
4437 30628, in which SENDME cells were miscounted by a decrement
4438 operator inside a log_debug() call. Closes ticket 30743.
4440 o Minor features (onion services v3):
4441 - Assist users who try to setup v2 client authorization in v3 onion
4442 services by pointing them to the right documentation. Closes
4445 o Minor bugfixes (Appveyor continuous integration):
4446 - Avoid spurious errors when Appveyor CI fails before the install
4447 step. Fixes bug 31884; bugfix on 0.3.4.2-alpha.
4449 o Minor bugfixes (best practices tracker):
4450 - When listing overbroad exceptions, do not also list problems, and
4451 do not list insufficiently broad exceptions. Fixes bug 31338;
4452 bugfix on 0.4.2.1-alpha.
4454 o Minor bugfixes (controller protocol):
4455 - Fix the MAPADDRESS controller command to accept one or more
4456 arguments. Previously, it required two or more arguments, and
4457 ignored the first. Fixes bug 31772; bugfix on 0.4.1.1-alpha.
4459 o Minor bugfixes (logging):
4460 - Add a missing check for HAVE_PTHREAD_H, because the backtrace code
4461 uses mutexes. Fixes bug 31614; bugfix on 0.2.5.2-alpha.
4462 - Disable backtrace signal handlers when shutting down tor. Fixes
4463 bug 31614; bugfix on 0.2.5.2-alpha.
4464 - Rate-limit our the logging message about the obsolete .exit
4465 notation. Previously, there was no limit on this warning, which
4466 could potentially be triggered many times by a hostile website.
4467 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
4468 - When initialising log domain masks, only set known log domains.
4469 Fixes bug 31854; bugfix on 0.2.1.1-alpha.
4471 o Minor bugfixes (logging, protocol violations):
4472 - Do not log a nonfatal assertion failure when receiving a VERSIONS
4473 cell on a connection using the obsolete v1 link protocol. Log a
4474 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
4476 o Minor bugfixes (modules):
4477 - Explain what the optional Directory Authority module is, and what
4478 happens when it is disabled. Fixes bug 31825; bugfix
4481 o Minor bugfixes (multithreading):
4482 - Avoid some undefined behaviour when freeing mutexes. Fixes bug
4483 31736; bugfix on 0.0.7.
4485 o Minor bugfixes (relay):
4486 - Avoid crashing when starting with a corrupt keys directory where
4487 the old ntor key and the new ntor key are identical. Fixes bug
4488 30916; bugfix on 0.2.4.8-alpha.
4490 o Minor bugfixes (tests, SunOS):
4491 - Avoid a map_anon_nofork test failure due to a signed/unsigned
4492 integer comparison. Fixes bug 31897; bugfix on 0.4.1.1-alpha.
4494 o Code simplification and refactoring:
4495 - Refactor connection_control_process_inbuf() to reduce the size of
4496 a practracker exception. Closes ticket 31840.
4497 - Refactor the microdescs_parse_from_string() function into smaller
4498 pieces, for better comprehensibility. Closes ticket 31675.
4499 - Use SEVERITY_MASK_IDX() to find the LOG_* mask indexes in the unit
4500 tests and fuzzers, rather than using hard-coded values. Closes
4502 - Interface for function `decrypt_desc_layer` cleaned up. Closes
4506 - Document the signal-safe logging behaviour in the tor man page.
4507 Also add some comments to the relevant functions. Closes
4509 - Explain why we can't destroy the backtrace buffer mutex. Explain
4510 why we don't need to destroy the log mutex. Closes ticket 31736.
4511 - The Tor source code repository now includes a (somewhat dated)
4512 description of Tor's modular architecture, in doc/HACKING/design.
4513 This is based on the old "tor-guts.git" repository, which we are
4514 adopting and superseding. Closes ticket 31849.
4517 Changes in version 0.4.1.6 - 2019-09-19
4518 This release backports several bugfixes to improve stability and
4519 correctness. Anyone experiencing build problems or crashes with 0.4.1.5,
4520 or experiencing reliability issues with single onion services, should
4523 o Major bugfixes (crash, Linux, Android, backport from 0.4.2.1-alpha):
4524 - Tolerate systems (including some Android installations) where
4525 madvise and MADV_DONTDUMP are available at build-time, but not at
4526 run time. Previously, these systems would notice a failed syscall
4527 and abort. Fixes bug 31570; bugfix on 0.4.1.1-alpha.
4528 - Tolerate systems (including some Linux installations) where
4529 madvise and/or MADV_DONTFORK are available at build-time, but not
4530 at run time. Previously, these systems would notice a failed
4531 syscall and abort. Fixes bug 31696; bugfix on 0.4.1.1-alpha.
4533 o Minor features (stem tests, backport from 0.4.2.1-alpha):
4534 - Change "make test-stem" so it only runs the stem tests that use
4535 tor. This change makes test-stem faster and more reliable. Closes
4538 o Minor bugfixes (build system, backport form 0.4.2.1-alpha):
4539 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
4540 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
4542 o Minor bugfixes (compilation, backport from 0.4.2.1-alpha):
4543 - Add more stub functions to fix compilation on Android with link-
4544 time optimization when --disable-module-dirauth is used.
4545 Previously, these compilation settings would make the compiler
4546 look for functions that didn't exist. Fixes bug 31552; bugfix
4548 - Suppress spurious float-conversion warnings from GCC when calling
4549 floating-point classifier functions on FreeBSD. Fixes part of bug
4550 31687; bugfix on 0.3.1.5-alpha.
4552 o Minor bugfixes (controller protocol):
4553 - Fix the MAPADDRESS controller command to accept one or more
4554 arguments. Previously, it required two or more arguments, and ignored
4555 the first. Fixes bug 31772; bugfix on 0.4.1.1-alpha.
4557 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha):
4558 - When extracting an IPv6 address from a PF-based proxy, verify that
4559 we are actually configured to receive an IPv6 address, and log an
4560 internal error if not. Fixes part of bug 31687; bugfix
4563 o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
4564 - When tor is missing descriptors for some primary entry guards,
4565 make the log message less alarming. It's normal for descriptors to
4566 expire, as long as tor fetches new ones soon after. Fixes bug
4567 31657; bugfix on 0.3.3.1-alpha.
4569 o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
4570 - Change log level of message "Hash of session info was not as
4571 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
4574 o Minor bugfixes (rust, backport from 0.4.2.1-alpha):
4575 - Correctly exclude a redundant rust build job in Travis. Fixes bug
4576 31463; bugfix on 0.3.5.4-alpha.
4578 o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
4579 - Always retry v2 single onion service intro and rend circuits with
4580 a 3-hop path. Previously, v2 single onion services used a 3-hop
4581 path when rendezvous circuits were retried after a remote or
4582 delayed failure, but a 1-hop path for immediate retries. Fixes bug
4583 23818; bugfix on 0.2.9.3-alpha.
4585 o Minor bugfixes (v3 single onion services, backport from 0.4.2.1-alpha):
4586 - Always retry v3 single onion service intro and rend circuits with
4587 a 3-hop path. Previously, v3 single onion services used a 3-hop
4588 path when rend circuits were retried after a remote or delayed
4589 failure, but a 1-hop path for immediate retries. Fixes bug 23818;
4590 bugfix on 0.3.2.1-alpha.
4591 - Make v3 single onion services fall back to a 3-hop intro, when all
4592 intro points are unreachable via a 1-hop path. Previously, v3
4593 single onion services failed when all intro nodes were unreachable
4594 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
4596 o Documentation (backport from 0.4.2.1-alpha):
4597 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
4598 notice.html so that operators no longer have to host it
4599 themselves. Closes ticket 31089.
4602 Changes in version 0.4.2.1-alpha - 2019-09-17
4603 This is the first alpha release in the 0.4.2.x series. It adds new
4604 defenses for denial-of-service attacks against onion services. It also
4605 includes numerous kinds of bugfixes and refactoring to help improve
4606 Tor's stability and ease of development.
4608 o Major features (onion service v3, denial of service):
4609 - Add onion service introduction denial of service defenses. Intro
4610 points can now rate-limit client introduction requests, using
4611 parameters that can be sent by the service within the
4612 ESTABLISH_INTRO cell. If the cell extension for this is not used,
4613 the intro point will honor the consensus parameters. Closes
4616 o Major bugfixes (circuit build, guard):
4617 - When considering upgrading circuits from "waiting for guard" to
4618 "open", always ignore circuits that are marked for close.
4619 Previously we could end up in the situation where a subsystem is
4620 notified of a circuit opening, but the circuit is still marked for
4621 close, leading to undesirable behavior. Fixes bug 30871; bugfix
4624 o Major bugfixes (crash, Linux, Android):
4625 - Tolerate systems (including some Android installations) where
4626 madvise and MADV_DONTDUMP are available at build-time, but not at
4627 run time. Previously, these systems would notice a failed syscall
4628 and abort. Fixes bug 31570; bugfix on 0.4.1.1-alpha.
4629 - Tolerate systems (including some Linux installations) where
4630 madvise and/or MADV_DONTFORK are available at build-time, but not
4631 at run time. Previously, these systems would notice a failed
4632 syscall and abort. Fixes bug 31696; bugfix on 0.4.1.1-alpha.
4634 o Minor features (best practices tracker):
4635 - Our best-practices tracker now integrates with our include-checker
4636 tool to keep track of how many layering violations we have not yet
4637 fixed. We hope to reduce this number over time to improve Tor's
4638 modularity. Closes ticket 31176.
4639 - Add a TOR_PRACTRACKER_OPTIONS variable for passing arguments to
4640 practracker from the environment. We may want this for continuous
4641 integration. Closes ticket 31309.
4642 - Give a warning rather than an error when a practracker exception
4643 is violated by a small amount, add a --list-overbroad option to
4644 practracker that lists exceptions that are stricter than they need
4645 to be, and provide an environment variable for disabling
4646 practracker. Closes ticket 30752.
4647 - Our best-practices tracker now looks at headers as well as C
4648 files. Closes ticket 31175.
4650 o Minor features (build system):
4651 - Add --disable-manpage and --disable-html-manual options to
4652 configure script. This will enable shortening build times by not
4653 building documentation. Resolves issue 19381.
4655 o Minor features (compilation):
4656 - Log a more useful error message when we are compiling and one of
4657 the compile-time hardening options we have selected can be linked
4658 but not executed. Closes ticket 27530.
4660 o Minor features (configuration):
4661 - The configuration code has been extended to allow splitting
4662 configuration data across multiple objects. Previously, all
4663 configuration data needed to be kept in a single object, which
4664 tended to become bloated. Closes ticket 31240.
4666 o Minor features (continuous integration):
4667 - When running CI builds on Travis, put some random data in
4668 ~/.torrc, to make sure no tests are reading the Tor configuration
4669 file from its default location. Resolves issue 30102.
4671 o Minor features (debugging):
4672 - Log a nonfatal assertion failure if we encounter a configuration
4673 line whose command is "CLEAR" but which has a nonempty value. This
4674 should be impossible, according to the rules of our configuration
4675 line parsing. Closes ticket 31529.
4677 o Minor features (git hooks):
4678 - Our pre-commit git hook now checks for a special file before
4679 running practracker, so that practracker only runs on branches
4680 that are based on master. Since the pre-push hook calls the pre-
4681 commit hook, practracker will also only run before pushes of
4682 branches based on master. Closes ticket 30979.
4684 o Minor features (git scripts):
4685 - Add a "--" command-line argument, to separate git-push-all.sh
4686 script arguments from arguments that are passed through to git
4687 push. Closes ticket 31314.
4688 - Add a -r <remote-name> argument to git-push-all.sh, so the script
4689 can push test branches to a personal remote. Closes ticket 31314.
4690 - Add a -t <test-branch-prefix> argument to git-merge-forward.sh and
4691 git-push-all.sh, which makes these scripts create, merge forward,
4692 and push test branches. Closes ticket 31314.
4693 - Add a -u argument to git-merge-forward.sh, so that the script can
4694 re-use existing test branches after a merge failure and fix.
4695 Closes ticket 31314.
4696 - Add a TOR_GIT_PUSH env var, which sets the default git push
4697 command and arguments for git-push-all.sh. Closes ticket 31314.
4698 - Add a TOR_PUSH_DELAY variable to git-push-all.sh, which makes the
4699 script push master and maint branches with a delay between each
4700 branch. These delays trigger the CI jobs in a set order, which
4701 should show the most likely failures first. Also make pushes
4702 atomic by default, and make the script pass any command-line
4703 arguments to git push. Closes ticket 29879.
4704 - Call the shellcheck script from the pre-commit hook. Closes
4706 - Skip pushing test branches that are the same as a remote
4707 maint/release/master branch in git-push-all.sh by default. Add a
4708 -s argument, so git-push-all.sh can push all test branches. Closes
4711 o Minor features (IPv6, logging):
4712 - Log IPv6 addresses as well as IPv4 addresses when describing
4713 routerinfos, routerstatuses, and nodes. Closes ticket 21003.
4715 o Minor features (onion service v3):
4716 - Do not allow single hop clients to fetch or post an HS descriptor
4717 from an HSDir. Closes ticket 24964.
4719 o Minor features (onion service):
4720 - Disallow single-hop clients at the introduction point. We've
4721 removed Tor2web support a while back and single-hop rendezvous
4722 attempts are blocked at the relays. This change should remove load
4723 off the network from spammy clients. Close ticket 24963.
4725 o Minor features (stem tests):
4726 - Change "make test-stem" so it only runs the stem tests that use
4727 tor. This change makes test-stem faster and more reliable. Closes
4730 o Minor features (testing):
4731 - Add a script to invoke "tor --dump-config" and "tor
4732 --verify-config" with various configuration options, and see
4733 whether tor's resulting configuration or error messages are what
4734 we expect. Use it for integration testing of our +Option and
4735 /Option flags. Closes ticket 31637.
4736 - Improve test coverage for our existing configuration parsing and
4737 management API. Closes ticket 30893.
4738 - Add integration tests to make sure that practracker gives the
4739 outputs we expect. Closes ticket 31477.
4740 - The practracker self-tests are now run as part of the Tor test
4741 suite. Closes ticket 31304.
4743 o Minor features (token bucket):
4744 - Implement a generic token bucket that uses a single counter, for
4745 use in anti-DoS onion service work. Closes ticket 30687.
4747 o Minor bugfixes (best practices tracker):
4748 - Fix a few issues in the best-practices script, including tests,
4749 tab tolerance, error reporting, and directory-exclusion logic.
4750 Fixes bug 29746; bugfix on 0.4.1.1-alpha.
4751 - When running check-best-practices, only consider files in the src
4752 subdirectory. Previously we had recursively considered all
4753 subdirectories, which made us get confused by the temporary
4754 directories made by "make distcheck". Fixes bug 31578; bugfix
4757 o Minor bugfixes (build system):
4758 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
4759 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
4761 o Minor bugfixes (chutney, makefiles, documentation):
4762 - "make test-network-all" now shows the warnings from each test-
4763 network.sh run on the console, so developers see new warnings
4764 early. We've also improved the documentation for this feature, and
4765 renamed a Makefile variable so the code is self-documenting. Fixes
4766 bug 30455; bugfix on 0.3.0.4-rc.
4768 o Minor bugfixes (compilation):
4769 - Add more stub functions to fix compilation on Android with link-
4770 time optimization when --disable-module-dirauth is used.
4771 Previously, these compilation settings would make the compiler
4772 look for functions that didn't exist. Fixes bug 31552; bugfix
4774 - Suppress spurious float-conversion warnings from GCC when calling
4775 floating-point classifier functions on FreeBSD. Fixes part of bug
4776 31687; bugfix on 0.3.1.5-alpha.
4778 o Minor bugfixes (configuration):
4779 - Invalid floating-point values in the configuration file are now
4780 treated as errors in the configuration. Previously, they were
4781 ignored and treated as zero. Fixes bug 31475; bugfix on 0.0.1.
4783 o Minor bugfixes (coverity):
4784 - Add an assertion when parsing a BEGIN cell so that coverity can be
4785 sure that we are not about to dereference a NULL address. Fixes
4786 bug 31026; bugfix on 0.2.4.7-alpha. This is CID 1447296.
4787 - In our siphash implementation, when building for coverity, use
4788 memcpy in place of a switch statement, so that coverity can tell
4789 we are not accessing out-of-bounds memory. Fixes bug 31025; bugfix
4790 on 0.2.8.1-alpha. This is tracked as CID 1447293 and 1447295.
4791 - Fix several coverity warnings from our unit tests. Fixes bug
4792 31030; bugfix on 0.2.4.1-alpha, 0.3.2.1-alpha, and 0.4.0.1-alpha.
4794 o Minor bugfixes (developer tooling):
4795 - Only log git script changes in the post-merge script when the
4796 merge was to the master branch. Fixes bug 31040; bugfix
4799 o Minor bugfixes (directory authorities):
4800 - Return a distinct status when formatting annotations fails. Fixes
4801 bug 30780; bugfix on 0.2.0.8-alpha.
4803 o Minor bugfixes (error handling):
4804 - On abort, try harder to flush the output buffers of log messages.
4805 On some platforms (macOS), log messages could be discarded when
4806 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
4807 - Report the tor version whenever an assertion fails. Previously, we
4808 only reported the Tor version on some crashes, and some non-fatal
4809 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
4810 - When tor aborts due to an error, close log file descriptors before
4811 aborting. Closing the logs makes some OSes flush log file buffers,
4812 rather than deleting buffered log lines. Fixes bug 31594; bugfix
4815 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6):
4816 - When extracting an IPv6 address from a PF-based proxy, verify that
4817 we are actually configured to receive an IPv6 address, and log an
4818 internal error if not. Fixes part of bug 31687; bugfix
4821 o Minor bugfixes (git hooks):
4822 - Remove a duplicate call to practracker from the pre-push hook. The
4823 pre-push hook already calls the pre-commit hook, which calls
4824 practracker. Fixes bug 31462; bugfix on 0.4.1.1-alpha.
4826 o Minor bugfixes (git scripts):
4827 - Stop hard-coding the bash path in the git scripts. Some OSes don't
4828 have bash in /usr/bin, others have an ancient bash at this path.
4829 Fixes bug 30840; bugfix on 0.4.0.1-alpha.
4830 - Stop hard-coding the tor master branch name and worktree path in
4831 the git scripts. Fixes bug 30841; bugfix on 0.4.0.1-alpha.
4832 - Allow git-push-all.sh to be run from any directory. Previously,
4833 the script only worked if run from an upstream worktree directory.
4834 Closes ticket 31678.
4836 o Minor bugfixes (guards):
4837 - When tor is missing descriptors for some primary entry guards,
4838 make the log message less alarming. It's normal for descriptors to
4839 expire, as long as tor fetches new ones soon after. Fixes bug
4840 31657; bugfix on 0.3.3.1-alpha.
4842 o Minor bugfixes (ipv6):
4843 - Check for private IPv6 addresses alongside their IPv4 equivalents
4844 when authorities check descriptors. Previously, we only checked
4845 for private IPv4 addresses. Fixes bug 31088; bugfix on
4846 0.2.3.21-rc. Patch by Neel Chauhan.
4847 - When parsing microdescriptors, we should check the IPv6 exit
4848 policy alongside IPv4. Previously, we checked both exit policies
4849 for only router info structures, while microdescriptors were
4850 IPv4-only. Fixes bug 27284; bugfix on 0.2.3.1-alpha. Patch by
4853 o Minor bugfixes (logging):
4854 - Change log level of message "Hash of session info was not as
4855 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
4857 - Fix a code issue that would have broken our parsing of log domains
4858 as soon as we had 33 of them. Fortunately, we still only have 29.
4859 Fixes bug 31451; bugfix on 0.4.1.4-rc.
4861 o Minor bugfixes (memory management):
4862 - Stop leaking a small amount of memory in nt_service_install(), in
4863 unreachable code. Fixes bug 30799; bugfix on 0.2.0.7-alpha. Patch
4866 o Minor bugfixes (networking, IP addresses):
4867 - When parsing addresses via Tor's internal DNS lookup API, reject
4868 IPv4 addresses in square brackets, and accept IPv6 addresses in
4869 square brackets. This change completes the work started in 23082,
4870 making address parsing consistent between tor's internal DNS
4871 lookup and address parsing APIs. Fixes bug 30721; bugfix
4873 - When parsing addresses via Tor's internal address:port parsing and
4874 DNS lookup APIs, require IPv6 addresses with ports to have square
4875 brackets. But allow IPv6 addresses without ports, whether or not
4876 they have square brackets. Fixes bug 30721; bugfix
4879 o Minor bugfixes (onion service v3):
4880 - When purging the client descriptor cache, close any introduction
4881 point circuits associated with purged cache entries. This avoids
4882 picking those circuits later when connecting to the same
4883 introduction points. Fixes bug 30921; bugfix on 0.3.2.1-alpha.
4885 o Minor bugfixes (onion services):
4886 - In the hs_ident_circuit_t data structure, remove the unused field
4887 circuit_type and the respective argument in hs_ident_circuit_new().
4888 This field was set by clients (for introduction) and services (for
4889 introduction and rendezvous) but was never used afterwards. Fixes
4890 bug 31490; bugfix on 0.3.2.1-alpha. Patch by Neel Chauhan.
4892 o Minor bugfixes (operator tools):
4893 - Make tor-print-ed-signing-cert(1) print certificate expiration
4894 date in RFC 1123 and UNIX timestamp formats, to make output
4895 machine readable. Fixes bug 31012; bugfix on 0.3.5.1-alpha.
4897 o Minor bugfixes (rust):
4898 - Correctly exclude a redundant rust build job in Travis. Fixes bug
4899 31463; bugfix on 0.3.5.4-alpha.
4900 - Raise the minimum rustc version to 1.31.0, as checked by configure
4901 and CI. Fixes bug 31442; bugfix on 0.3.5.4-alpha.
4903 o Minor bugfixes (sendme, code structure):
4904 - Rename the trunnel SENDME file definition from sendme.trunnel to
4905 sendme_cell.trunnel to avoid having twice sendme.{c|h} in the
4906 repository. Fixes bug 30769; bugfix on 0.4.1.1-alpha.
4908 o Minor bugfixes (statistics):
4909 - Stop removing the ed25519 signature if the extra info file is too
4910 big. If the signature data was removed, but the keyword was kept,
4911 this could result in an unparseable extra info file. Fixes bug
4912 30958; bugfix on 0.2.7.2-alpha.
4914 o Minor bugfixes (subsystems):
4915 - Make the subsystem init order match the subsystem module
4916 dependencies. Call windows process security APIs as early as
4917 possible. Initialize logging before network and time, so that
4918 network and time can use logging. Fixes bug 31615; bugfix
4921 o Minor bugfixes (testing):
4922 - Teach the util/socketpair_ersatz test to work correctly when we
4923 have no network stack configured. Fixes bug 30804; bugfix
4926 o Minor bugfixes (v2 single onion services):
4927 - Always retry v2 single onion service intro and rend circuits with
4928 a 3-hop path. Previously, v2 single onion services used a 3-hop
4929 path when rendezvous circuits were retried after a remote or
4930 delayed failure, but a 1-hop path for immediate retries. Fixes bug
4931 23818; bugfix on 0.2.9.3-alpha.
4933 o Minor bugfixes (v3 single onion services):
4934 - Always retry v3 single onion service intro and rend circuits with
4935 a 3-hop path. Previously, v3 single onion services used a 3-hop
4936 path when rend circuits were retried after a remote or delayed
4937 failure, but a 1-hop path for immediate retries. Fixes bug 23818;
4938 bugfix on 0.3.2.1-alpha.
4939 - Make v3 single onion services fall back to a 3-hop intro, when all
4940 intro points are unreachable via a 1-hop path. Previously, v3
4941 single onion services failed when all intro nodes were unreachable
4942 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
4945 - Improve documentation in circuit padding subsystem. Patch by
4946 Tobias Pulls. Closes ticket 31113.
4947 - Include an example usage for IPv6 ORPort in our sample torrc.
4948 Closes ticket 31320; patch from Ali Raheem.
4949 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
4950 notice.html so that operators no longer have to host it
4951 themselves. Closes ticket 31089.
4954 - No longer include recommended package digests in votes as detailed
4955 in proposal 301. The RecommendedPackages torrc option is
4956 deprecated and will no longer have any effect. "package" lines
4957 will still be considered when computing consensuses for consensus
4958 methods that include them. (This change has no effect on the list
4959 of recommended Tor versions, which is still in use.) Closes
4961 - Remove torctl.in from contrib/dist directory. Resolves
4965 - Run shellcheck for all non-third-party shell scripts that are
4966 shipped with Tor. Closes ticket 29533.
4967 - When checking shell scripts, ignore any user-created directories.
4968 Closes ticket 30967.
4970 o Code simplification and refactoring (config handling):
4971 - Extract our variable manipulation code from confparse.c to a new
4972 lower-level typedvar.h module. Closes ticket 30864.
4973 - Lower another layer of object management from confparse.c to a
4974 more general tool. Now typed structure members are accessible via
4975 an abstract type. Implements ticket 30914.
4976 - Move our backend logic for working with configuration and state
4977 files into a lower-level library, since it no longer depends on
4978 any tor-specific functionality. Closes ticket 31626.
4979 - Numerous simplifications in configuration-handling logic: remove
4980 duplicated macro definitions, replace magical names with flags,
4981 and refactor "TestingTorNetwork" to use the same default-option
4982 logic as the rest of Tor. Closes ticket 30935.
4983 - Replace our ad-hoc set of flags for configuration variables and
4984 configuration variable types with fine-grained orthogonal flags
4985 corresponding to the actual behavior we want. Closes ticket 31625.
4987 o Code simplification and refactoring (misc):
4988 - Eliminate some uses of lower-level control reply abstractions,
4989 primarily in the onion_helper functions. Closes ticket 30889.
4990 - Rework bootstrap tracking to use the new publish-subscribe
4991 subsystem. Closes ticket 29976.
4992 - Rewrite format_node_description() and router_get_verbose_nickname()
4993 to use strlcpy() and strlcat(). The previous implementation used
4994 memcpy() and pointer arithmetic, which was error-prone. Closes
4995 ticket 31545. This is CID 1452819.
4996 - Split extrainfo_dump_to_string() into smaller functions. Closes
4998 - Use the ptrdiff_t type consistently for expressing variable
4999 offsets and pointer differences. Previously we incorrectly (but
5000 harmlessly) used int and sometimes off_t for these cases. Closes
5002 - Use the subsystems mechanism to manage the main event loop code.
5003 Closes ticket 30806.
5004 - Various simplifications and minor improvements to the circuit
5005 padding machines. Patch by Tobias Pulls. Closes tickets 31112
5008 o Documentation (hard-coded directories):
5009 - Improve the documentation for the DirAuthority and FallbackDir
5010 torrc options. Closes ticket 30955.
5012 o Documentation (tor.1 man page):
5013 - Fix typo in tor.1 man page: the option is "--help", not "-help".
5014 Fixes bug 31008; bugfix on 0.2.2.9-alpha.
5017 Changes in version 0.4.1.5 - 2019-08-20
5018 This is the first stable release in the 0.4.1.x series. This series
5019 adds experimental circuit-level padding, authenticated SENDME cells to
5020 defend against certain attacks, and several performance improvements
5021 to save on CPU consumption. It fixes bugs in bootstrapping and v3
5022 onion services. It also includes numerous smaller features and
5023 bugfixes on earlier versions.
5025 Per our support policy, we will support the 0.4.1.x series for nine
5026 months, or until three months after the release of a stable 0.4.2.x:
5027 whichever is longer. If you need longer-term support, please stick
5028 with 0.3.5.x, which will we plan to support until Feb 2022.
5030 Below are the changes since 0.4.1.4-rc. For a complete list of changes
5031 since 0.4.0.5, see the ReleaseNotes file.
5033 o Directory authority changes:
5034 - The directory authority "dizum" has a new IP address. Closes
5037 o Minor features (circuit padding logging):
5038 - Demote noisy client-side warn logs about circuit padding to
5039 protocol warnings. Add additional log messages and circuit ID
5040 fields to help with bug 30992 and any other future issues.
5042 o Minor bugfixes (circuit padding negotiation):
5043 - Bump the circuit padding protocol version to explicitly signify
5044 that the HS setup machine support is finalized in 0.4.1.x-stable.
5045 This also means that 0.4.1.x-alpha clients will not negotiate
5046 padding with 0.4.1.x-stable relays, and 0.4.1.x-stable clients
5047 will not negotiate padding with 0.4.1.x-alpha relays (or 0.4.0.x
5048 relays). Fixes bug 31356; bugfix on 0.4.1.1-alpha.
5050 o Minor bugfixes (circuit padding):
5051 - Ignore non-padding cells on padding circuits. This addresses
5052 various warning messages from subsystems that were not expecting
5053 padding circuits. Fixes bug 30942; bugfix on 0.4.1.1-alpha.
5055 o Minor bugfixes (clock skew detection):
5056 - Don't believe clock skew results from NETINFO cells that appear to
5057 arrive before we sent the VERSIONS cells they are responding to.
5058 Previously, we would accept them up to 3 minutes "in the past".
5059 Fixes bug 31343; bugfix on 0.2.4.4-alpha.
5061 o Minor bugfixes (compatibility, standards compliance):
5062 - Fix a bug that would invoke undefined behavior on certain
5063 operating systems when trying to asprintf() a string exactly
5064 INT_MAX bytes long. We don't believe this is exploitable, but it's
5065 better to fix it anyway. Fixes bug 31001; bugfix on 0.2.2.11-alpha.
5066 Found and fixed by Tobias Stoeckmann.
5068 o Minor bugfixes (compilation warning):
5069 - Fix a compilation warning on Windows about casting a function
5070 pointer for GetTickCount64(). Fixes bug 31374; bugfix
5073 o Minor bugfixes (compilation):
5074 - Avoid using labs() on time_t, which can cause compilation warnings
5075 on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
5077 o Minor bugfixes (distribution):
5078 - Do not ship any temporary files found in the
5079 scripts/maint/practracker directory. Fixes bug 31311; bugfix
5082 o Testing (continuous integration):
5083 - In Travis, make stem log a controller trace to the console, and
5084 tail stem's tor log after failure. Closes ticket 30591.
5085 - In Travis, only run the stem tests that use a tor binary. Closes
5089 Changes in version 0.4.1.4-rc - 2019-07-25
5090 Tor 0.4.1.4-rc fixes a few bugs from previous versions of Tor, and
5091 updates to a new list of fallback directories. If no new bugs are
5092 found, the next release in the 0.4.1.x serious should be stable.
5094 o Major bugfixes (circuit build, guard):
5095 - When considering upgrading circuits from "waiting for guard" to
5096 "open", always ignore circuits that are marked for close. Otherwise,
5097 we can end up in the situation where a subsystem is notified that
5098 a closing circuit has just opened, leading to undesirable
5099 behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha.
5101 o Minor features (continuous integration):
5102 - Our Travis configuration now uses Chutney to run some network
5103 integration tests automatically. Closes ticket 29280.
5105 o Minor features (fallback directory list):
5106 - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc
5107 in December 2018 (of which ~122 were still functional), with a
5108 list of 148 fallbacks (70 new, 78 existing, 79 removed) generated
5109 in June 2019. Closes ticket 28795.
5111 o Minor bugfixes (circuit padding):
5112 - On relays, properly check that a padding machine is absent before
5113 logging a warning about it being absent. Fixes bug 30649; bugfix
5115 - Add two NULL checks in unreachable places to silence Coverity (CID
5116 144729 and 1447291) and better future-proof ourselves. Fixes bug
5117 31024; bugfix on 0.4.1.1-alpha.
5119 o Minor bugfixes (crash on exit):
5120 - Avoid a set of possible code paths that could try to use freed
5121 memory in routerlist_free() while Tor was exiting. Fixes bug
5122 31003; bugfix on 0.1.2.2-alpha.
5124 o Minor bugfixes (logging):
5125 - Fix a conflict between the flag used for messaging-domain log
5126 messages, and the LD_NO_MOCK testing flag. Fixes bug 31080; bugfix
5129 o Minor bugfixes (memory leaks):
5130 - Fix a trivial memory leak when parsing an invalid value from a
5131 download schedule in the configuration. Fixes bug 30894; bugfix
5134 o Code simplification and refactoring:
5135 - Remove some dead code from circpad_machine_remove_token() to fix
5136 some Coverity warnings (CID 1447298). Fixes bug 31027; bugfix
5140 Changes in version 0.4.1.3-alpha - 2019-06-25
5141 Tor 0.4.1.3-alpha resolves numerous bugs left over from the previous
5142 alpha, most of them from earlier release series.
5144 o Major bugfixes (Onion service reachability):
5145 - Properly clean up the introduction point map when circuits change
5146 purpose from onion service circuits to pathbias, measurement, or
5147 other circuit types. This should fix some service-side instances
5148 of introduction point failure. Fixes bug 29034; bugfix
5151 o Minor features (geoip):
5152 - Update geoip and geoip6 to the June 10 2019 Maxmind GeoLite2
5153 Country database. Closes ticket 30852.
5155 o Minor features (logging):
5156 - Give a more useful assertion failure message if we think we have
5157 minherit() but we fail to make a region non-inheritable. Give a
5158 compile-time warning if our support for minherit() is incomplete.
5159 Closes ticket 30686.
5161 o Minor bugfixes (circuit isolation):
5162 - Fix a logic error that prevented the SessionGroup sub-option from
5163 being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha.
5165 o Minor bugfixes (continuous integration):
5166 - Allow the test-stem job to fail in Travis, because it sometimes
5167 hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha.
5168 - Skip test_rebind on macOS in Travis, because it is unreliable on
5169 macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
5170 - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment
5171 variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
5173 o Minor bugfixes (directory authorities):
5174 - Stop crashing after parsing an unknown descriptor purpose
5175 annotation. We think this bug can only be triggered by modifying a
5176 local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha.
5178 o Minor bugfixes (pluggable transports):
5179 - When running as a bridge with pluggable transports, always publish
5180 pluggable transport information in our extrainfo descriptor, even
5181 if ExtraInfoStatistics is 0. This information is needed by
5182 BridgeDB. Fixes bug 30956; bugfix on 0.4.1.1-alpha.
5185 - Mention URLs for Travis/Appveyor/Jenkins in ReleasingTor.md.
5186 Closes ticket 30630.
5189 Changes in version 0.4.1.2-alpha - 2019-06-06
5190 Tor 0.4.1.2-alpha resolves numerous bugs--some of them from the
5191 previous alpha, and some much older. It also contains minor testing
5192 improvements, and an improvement to the security of our authenticated
5193 SENDME implementation.
5195 o Major bugfixes (bridges):
5196 - Consider our directory information to have changed when our list
5197 of bridges changes. Previously, Tor would not re-compute the
5198 status of its directory information when bridges changed, and
5199 therefore would not realize that it was no longer able to build
5200 circuits. Fixes part of bug 29875.
5201 - Do not count previously configured working bridges towards our
5202 total of working bridges. Previously, when Tor's list of bridges
5203 changed, it would think that the old bridges were still usable,
5204 and delay fetching router descriptors for the new ones. Fixes part
5205 of bug 29875; bugfix on 0.3.0.1-alpha.
5207 o Major bugfixes (flow control, SENDME):
5208 - Decrement the stream-level package window after packaging a cell.
5209 Previously, it was done inside a log_debug() call, meaning that if
5210 debug logs were not enabled, the decrement would never happen, and
5211 thus the window would be out of sync with the other end point.
5212 Fixes bug 30628; bugfix on 0.4.1.1-alpha.
5214 o Major bugfixes (onion service reachability):
5215 - Properly clean up the introduction point map and associated state
5216 when circuits change purpose from onion service circuits to
5217 pathbias, measurement, or other circuit types. This may fix some
5218 instances of introduction point failure. Fixes bug 29034; bugfix
5221 o Minor features (authenticated SENDME):
5222 - Ensure that there is enough randomness on every circuit to prevent
5223 an attacker from successfully predicting the hashes they will need
5224 to include in authenticated SENDME cells. At a random interval, if
5225 we have not sent randomness already, we now leave some extra space
5226 at the end of a cell that we can fill with random bytes. Closes
5229 o Minor features (continuous integration):
5230 - When running coverage builds on Travis, we now set
5231 TOR_TEST_RNG_SEED, to avoid RNG-based coverage differences. Part
5234 o Minor features (maintenance):
5235 - Add a new "make autostyle" target that developers can use to apply
5236 all automatic Tor style and consistency conversions to the
5237 codebase. Closes ticket 30539.
5239 o Minor features (testing):
5240 - The circuitpadding tests now use a reproducible RNG implementation,
5241 so that if a test fails, we can learn why. Part of ticket 28878.
5242 - Tor's tests now support an environment variable, TOR_TEST_RNG_SEED,
5243 to set the RNG seed for tests that use a reproducible RNG. Part of
5245 - When running tests in coverage mode, take additional care to make
5246 our coverage deterministic, so that we can accurately track
5247 changes in code coverage. Closes ticket 30519.
5249 o Minor bugfixes (configuration, proxies):
5250 - Fix a bug that prevented us from supporting SOCKS5 proxies that
5251 want authentication along with configured (but unused!)
5252 ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.
5254 o Minor bugfixes (controller):
5255 - POSTDESCRIPTOR requests should work again. Previously, they were
5256 broken if a "purpose=" flag was specified. Fixes bug 30580; bugfix
5258 - Repair the HSFETCH command so that it works again. Previously, it
5259 expected a body when it shouldn't have. Fixes bug 30646; bugfix
5262 o Minor bugfixes (developer tooling):
5263 - Fix pre-push hook to allow fixup and squash commits when pushing
5264 to non-upstream git remote. Fixes bug 30286; bugfix
5267 o Minor bugfixes (directory authority):
5268 - Move the "bandwidth-file-headers" line in directory authority
5269 votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix
5272 o Minor bugfixes (NetBSD):
5273 - Fix usage of minherit() on NetBSD and other platforms that define
5274 MAP_INHERIT_{ZERO,NONE} instead of INHERIT_{ZERO,NONE}. Fixes bug
5275 30614; bugfix on 0.4.0.2-alpha. Patch from Taylor Campbell.
5277 o Minor bugfixes (out-of-memory handler):
5278 - When purging the DNS cache because of an out-of-memory condition,
5279 try purging just the older entries at first. Previously, we would
5280 always purge the whole thing. Fixes bug 29617; bugfix
5283 o Minor bugfixes (portability):
5284 - Avoid crashing in our tor_vasprintf() implementation on systems
5285 that define neither vasprintf() nor _vscprintf(). (This bug has
5286 been here long enough that we question whether people are running
5287 Tor on such systems, but we're applying the fix out of caution.)
5288 Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by
5291 o Minor bugfixes (shutdown, libevent, memory safety):
5292 - Avoid use-after-free bugs when shutting down, by making sure that
5293 we shut down libevent only after shutting down all of its users.
5294 We believe these are harmless in practice, since they only occur
5295 on the shutdown path, and do not involve any attacker-controlled
5296 data. Fixes bug 30629; bugfix on 0.4.1.1-alpha.
5298 o Minor bugfixes (static analysis):
5299 - Fix several spurious Coverity warnings about the unit tests, to
5300 lower our chances of missing real warnings in the future. Fixes
5301 bug 30150; bugfix on 0.3.5.1-alpha and various other Tor versions.
5304 - Specify torrc paths (with empty files) when launching tor in
5305 integration tests; refrain from reading user and system torrcs.
5306 Resolves issue 29702.
5309 Changes in version 0.4.1.1-alpha - 2019-05-22
5310 This is the first alpha in the 0.4.1.x series. It introduces
5311 lightweight circuit padding to make some onion-service circuits harder
5312 to distinguish, includes a new "authenticated SENDME" feature to make
5313 certain denial-of-service attacks more difficult, and improves
5314 performance in several areas.
5316 o Major features (circuit padding):
5317 - Onion service clients now add padding cells at the start of their
5318 INTRODUCE and RENDEZVOUS circuits, to make those circuits' traffic
5319 look more like general purpose Exit traffic. The overhead for this
5320 is 2 extra cells in each direction for RENDEZVOUS circuits, and 1
5321 extra upstream cell and 10 downstream cells for INTRODUCE
5322 circuits. This feature is only enabled when also supported by the
5323 circuit's middle node. (Clients may specify fixed middle nodes
5324 with the MiddleNodes option, and may force-disable this feature
5325 with the CircuitPadding option.) Closes ticket 28634.
5327 o Major features (code organization):
5328 - Tor now includes a generic publish-subscribe message-passing
5329 subsystem that we can use to organize intermodule dependencies. We
5330 hope to use this to reduce dependencies between modules that don't
5331 need to be related, and to generally simplify our codebase. Closes
5334 o Major features (controller protocol):
5335 - Controller commands are now parsed using a generalized parsing
5336 subsystem. Previously, each controller command was responsible for
5337 parsing its own input, which led to strange inconsistencies.
5338 Closes ticket 30091.
5340 o Major features (flow control):
5341 - Implement authenticated SENDMEs as detailed in proposal 289. A
5342 SENDME cell now includes the digest of the traffic that it
5343 acknowledges, so that once an end point receives the SENDME, it
5344 can confirm the other side's knowledge of the previous cells that
5345 were sent, and prevent certain types of denial-of-service attacks.
5346 This behavior is controlled by two new consensus parameters: see
5347 the proposal for more details. Fixes ticket 26288.
5349 o Major features (performance):
5350 - Our node selection algorithm now excludes nodes in linear time.
5351 Previously, the algorithm was quadratic, which could slow down
5352 heavily used onion services. Closes ticket 30307.
5354 o Major features (performance, RNG):
5355 - Tor now constructs a fast secure pseudorandom number generator for
5356 each thread, to use when performance is critical. This PRNG is
5357 based on AES-CTR, using a buffering construction similar to
5358 libottery and the (newer) OpenBSD arc4random() code. It
5359 outperforms OpenSSL 1.1.1a's CSPRNG by roughly a factor of 100 for
5360 small outputs. Although we believe it to be cryptographically
5361 strong, we are only using it when necessary for performance.
5362 Implements tickets 29023 and 29536.
5364 o Major bugfixes (onion service v3):
5365 - Fix an unreachable bug in which an introduction point could try to
5366 send an INTRODUCE_ACK with a status code that Trunnel would refuse
5367 to encode, leading the relay to assert(). We've consolidated the
5368 ABI values into Trunnel now. Fixes bug 30454; bugfix
5370 - Clients can now handle unknown status codes from INTRODUCE_ACK
5371 cells. (The NACK behavior will stay the same.) This will allow us
5372 to extend status codes in the future without breaking the normal
5373 client behavior. Fixes another part of bug 30454; bugfix
5376 o Minor features (circuit padding):
5377 - We now use a fast PRNG when scheduling circuit padding. Part of
5379 - Allow the padding machine designer to pick the edges of their
5380 histogram instead of trying to compute them automatically using an
5381 exponential formula. Resolves some undefined behavior in the case
5382 of small histograms and allows greater flexibility on machine
5383 design. Closes ticket 29298; bugfix on 0.4.0.1-alpha.
5384 - Allow circuit padding machines to hold a circuit open until they
5385 are done padding it. Closes ticket 28780.
5387 o Minor features (compile-time modules):
5388 - Add a "--list-modules" command to print a list of which compile-
5389 time modules are enabled. Closes ticket 30452.
5391 o Minor features (continuous integration):
5392 - Remove sudo configuration lines from .travis.yml as they are no
5393 longer needed with current Travis build environment. Resolves
5395 - In Travis, show stem's tor log after failure. Closes ticket 30234.
5397 o Minor features (controller):
5398 - Add onion service version 3 support to the HSFETCH command.
5399 Previously, only version 2 onion services were supported. Closes
5400 ticket 25417. Patch by Neel Chauhan.
5402 o Minor features (debugging):
5403 - Introduce tor_assertf() and tor_assertf_nonfatal() to enable
5404 logging of additional information during assert failure. Now we
5405 can use format strings to include information for trouble
5406 shooting. Resolves ticket 29662.
5408 o Minor features (defense in depth):
5409 - In smartlist_remove_keeporder(), set unused pointers to NULL, in
5410 case a bug causes them to be used later. Closes ticket 30176.
5411 Patch from Tobias Stoeckmann.
5412 - Tor now uses a cryptographically strong PRNG even for decisions
5413 that we do not believe are security-sensitive. Previously, for
5414 performance reasons, we had used a trivially predictable linear
5415 congruential generator algorithm for certain load-balancing and
5416 statistical sampling decisions. Now we use our fast RNG in those
5417 cases. Closes ticket 29542.
5419 o Minor features (developer tools):
5420 - Tor's "practracker" test script now checks for files and functions
5421 that seem too long and complicated. Existing overlong functions
5422 and files are accepted for now, but should eventually be
5423 refactored. Closes ticket 29221.
5424 - Add some scripts used for git maintenance to scripts/git. Closes
5426 - Call practracker from pre-push and pre-commit git hooks to let
5427 developers know if they made any code style violations. Closes
5429 - Add a script to check that each header has a well-formed and
5430 unique guard macro. Closes ticket 29756.
5432 o Minor features (geoip):
5433 - Update geoip and geoip6 to the May 13 2019 Maxmind GeoLite2
5434 Country database. Closes ticket 30522.
5436 o Minor features (HTTP tunnel):
5437 - Return an informative web page when the HTTPTunnelPort is used as
5438 an HTTP proxy. Closes ticket 27821, patch by "eighthave".
5440 o Minor features (IPv6, v3 onion services):
5441 - Make v3 onion services put IPv6 addresses in service descriptors.
5442 Before this change, service descriptors only contained IPv4
5443 addresses. Implements 26992.
5445 o Minor features (modularity):
5446 - The "--disable-module-dirauth" compile-time option now disables
5447 even more dirauth-only code. Closes ticket 30345.
5449 o Minor features (performance):
5450 - Use OpenSSL's implementations of SHA3 when available (in OpenSSL
5451 1.1.1 and later), since they tend to be faster than tiny-keccak.
5452 Closes ticket 28837.
5454 o Minor features (testing):
5455 - Tor's unit test code now contains helper functions to replace the
5456 PRNG with a deterministic or reproducible version for testing.
5457 Previously, various tests implemented this in various ways.
5458 Implements ticket 29732.
5459 - We now have a script, cov-test-determinism.sh, to identify places
5460 where our unit test coverage has become nondeterministic. Closes
5462 - Check that representative subsets of values of `int` and `unsigned
5463 int` can be represented by `void *`. Resolves issue 29537.
5465 o Minor bugfixes (bridge authority):
5466 - Bridge authorities now set bridges as running or non-running when
5467 about to dump their status to a file. Previously, they set bridges
5468 as running in response to a GETINFO command, but those shouldn't
5469 modify data structures. Fixes bug 24490; bugfix on 0.2.0.13-alpha.
5470 Patch by Neel Chauhan.
5472 o Minor bugfixes (channel padding statistics):
5473 - Channel padding write totals and padding-enabled totals are now
5474 counted properly in relay extrainfo descriptors. Fixes bug 29231;
5475 bugfix on 0.3.1.1-alpha.
5477 o Minor bugfixes (circuit padding):
5478 - Add a "CircuitPadding" torrc option to disable circuit padding.
5479 Fixes bug 28693; bugfix on 0.4.0.1-alpha.
5480 - Allow circuit padding machines to specify that they do not
5481 contribute much overhead, and provide consensus flags and torrc
5482 options to force clients to only use these low overhead machines.
5483 Fixes bug 29203; bugfix on 0.4.0.1-alpha.
5484 - Provide a consensus parameter to fully disable circuit padding, to
5485 be used in emergency network overload situations. Fixes bug 30173;
5486 bugfix on 0.4.0.1-alpha.
5487 - The circuit padding subsystem will no longer schedule padding if
5488 dormant mode is enabled. Fixes bug 28636; bugfix on 0.4.0.1-alpha.
5489 - Inspect a circuit-level cell queue before sending padding, to
5490 avoid sending padding while too much data is already queued. Fixes
5491 bug 29204; bugfix on 0.4.0.1-alpha.
5492 - Avoid calling monotime_absolute_usec() in circuit padding machines
5493 that do not use token removal or circuit RTT estimation. Fixes bug
5494 29085; bugfix on 0.4.0.1-alpha.
5496 o Minor bugfixes (compilation, unusual configurations):
5497 - Avoid failures when building with the ALL_BUGS_ARE_FATAL option
5498 due to missing declarations of abort(), and prevent other such
5499 failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.
5501 o Minor bugfixes (controller protocol):
5502 - Teach the controller parser to distinguish an object preceded by
5503 an argument list from one without. Previously, it couldn't
5504 distinguish an argument list from the first line of a multiline
5505 object. Fixes bug 29984; bugfix on 0.2.3.8-alpha.
5507 o Minor bugfixes (directory authority, ipv6):
5508 - Directory authorities with IPv6 support now always mark themselves
5509 as reachable via IPv6. Fixes bug 24338; bugfix on 0.2.4.1-alpha.
5510 Patch by Neel Chauhan.
5512 o Minor bugfixes (documentation):
5513 - Improve the documentation for using MapAddress with ".exit". Fixes
5514 bug 30109; bugfix on 0.1.0.1-rc.
5515 - Improve the monotonic time module and function documentation to
5516 explain what "monotonic" actually means, and document some results
5517 that have surprised people. Fixes bug 29640; bugfix
5519 - Use proper formatting when providing an example on quoting options
5520 that contain whitespace. Fixes bug 29635; bugfix on 0.2.3.18-rc.
5522 o Minor bugfixes (logging):
5523 - Do not log a warning when running with an OpenSSL version other
5524 than the one Tor was compiled with, if the two versions should be
5525 compatible. Previously, we would warn whenever the version was
5526 different. Fixes bug 30190; bugfix on 0.2.4.2-alpha.
5527 - Warn operators when the MyFamily option is set but ContactInfo is
5528 missing, as the latter should be set too. Fixes bug 25110; bugfix
5531 o Minor bugfixes (memory leak):
5532 - Avoid a minor memory leak that could occur on relays when failing
5533 to create a "keys" directory. Fixes bug 30148; bugfix
5536 o Minor bugfixes (onion services):
5537 - Avoid a GCC 9.1.1 warning (and possible crash depending on libc
5538 implemenation) when failing to load an onion service client
5539 authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha.
5540 - When refusing to launch a controller's HSFETCH request because of
5541 rate-limiting, respond to the controller with a new response,
5542 "QUERY_RATE_LIMITED". Previously, we would log QUERY_NO_HSDIR for
5543 this case. Fixes bug 28269; bugfix on 0.3.1.1-alpha. Patch by
5545 - When relaunching a circuit to a rendezvous service, mark the
5546 circuit as needing high-uptime routers as appropriate. Fixes bug
5547 17357; bugfix on 0.1.0.1-rc. Patch by Neel Chauhan.
5548 - Stop ignoring IPv6 link specifiers sent to v3 onion services.
5549 (IPv6 support for v3 onion services is still incomplete: see
5550 ticket 23493 for details.) Fixes bug 23588; bugfix on
5551 0.3.2.1-alpha. Patch by Neel Chauhan.
5553 o Minor bugfixes (onion services, performance):
5554 - When building circuits to onion services, call tor_addr_parse()
5555 less often. Previously, we called tor_addr_parse() in
5556 circuit_is_acceptable() even if its output wasn't used. This
5557 change should improve performance when building circuits. Fixes
5558 bug 22210; bugfix on 0.2.8.12. Patch by Neel Chauhan.
5560 o Minor bugfixes (performance):
5561 - When checking whether a node is a bridge, use a fast check to make
5562 sure that its identity is set. Previously, we used a constant-time
5563 check, which is not necessary in this case. Fixes bug 30308;
5564 bugfix on 0.3.5.1-alpha.
5566 o Minor bugfixes (pluggable transports):
5567 - Tor now sets TOR_PT_EXIT_ON_STDIN_CLOSE=1 for client transports as
5568 well as servers. Fixes bug 25614; bugfix on 0.2.7.1-alpha.
5570 o Minor bugfixes (probability distributions):
5571 - Refactor and improve parts of the probability distribution code
5572 that made Coverity complain. Fixes bug 29805; bugfix
5575 o Minor bugfixes (python):
5576 - Stop assuming that /usr/bin/python3 exists. For scripts that work
5577 with python2, use /usr/bin/python. Otherwise, use /usr/bin/env
5578 python3. Fixes bug 29913; bugfix on 0.2.5.3-alpha.
5580 o Minor bugfixes (relay):
5581 - When running as a relay, if IPv6Exit is set to 1 while ExitRelay
5582 is auto, act as if ExitRelay is 1. Previously, we would ignore
5583 IPv6Exit if ExitRelay was 0 or auto. Fixes bug 29613; bugfix on
5584 0.3.5.1-alpha. Patch by Neel Chauhan.
5586 o Minor bugfixes (stats):
5587 - When ExtraInfoStatistics is 0, stop including bandwidth usage
5588 statistics, GeoIPFile hashes, ServerTransportPlugin lines, and
5589 bridge statistics by country in extra-info documents. Fixes bug
5590 29018; bugfix on 0.2.4.1-alpha.
5592 o Minor bugfixes (testing):
5593 - Call setrlimit() to disable core dumps in test_bt_cl.c. Previously
5594 we used `ulimit -c` in test_bt.sh, which violates POSIX shell
5595 compatibility. Fixes bug 29061; bugfix on 0.3.5.1-alpha.
5596 - Fix some incorrect code in the v3 onion service unit tests. Fixes
5597 bug 29243; bugfix on 0.3.2.1-alpha.
5598 - In the "routerkeys/*" tests, check the return values of mkdir()
5599 for possible failures. Fixes bug 29939; bugfix on 0.2.7.2-alpha.
5600 Found by Coverity as CID 1444254.
5601 - Split test_utils_general() into several smaller test functions.
5602 This makes it easier to perform resource deallocation on assert
5603 failure, and fixes Coverity warnings CID 1444117 and CID 1444118.
5604 Fixes bug 29823; bugfix on 0.2.9.1-alpha.
5606 o Minor bugfixes (tor-resolve):
5607 - Fix a memory leak in tor-resolve that could happen if Tor gave it
5608 a malformed SOCKS response. (Memory leaks in tor-resolve don't
5609 actually matter, but it's good to fix them anyway.) Fixes bug
5610 30151; bugfix on 0.4.0.1-alpha.
5612 o Code simplification and refactoring:
5613 - Abstract out the low-level formatting of replies on the control
5614 port. Implements ticket 30007.
5615 - Add several assertions in an attempt to fix some Coverity
5616 warnings. Closes ticket 30149.
5617 - Introduce a connection_dir_buf_add() helper function that checks
5618 for compress_state of dir_connection_t and automatically writes a
5619 string to directory connection with or without compression.
5620 Resolves issue 28816.
5621 - Make the base32_decode() API return the number of bytes written,
5622 for consistency with base64_decode(). Closes ticket 28913.
5623 - Move most relay-only periodic events out of mainloop.c into the
5624 relay subsystem. Closes ticket 30414.
5625 - Refactor and encapsulate parts of the codebase that manipulate
5626 crypt_path_t objects. Resolves issue 30236.
5627 - Refactor several places in our code that Coverity incorrectly
5628 believed might have memory leaks. Closes ticket 30147.
5629 - Remove redundant return values in crypto_format, and the
5630 associated return value checks elsewhere in the code. Make the
5631 implementations in crypto_format consistent, and remove redundant
5632 code. Resolves ticket 29660.
5633 - Rename tor_mem_is_zero() to fast_mem_is_zero(), to emphasize that
5634 it is not a constant-time function. Closes ticket 30309.
5635 - Replace hs_desc_link_specifier_t with link_specifier_t, and remove
5636 all hs_desc_link_specifier_t-specific code. Fixes bug 22781;
5637 bugfix on 0.3.2.1-alpha.
5638 - Simplify v3 onion service link specifier handling code. Fixes bug
5639 23576; bugfix on 0.3.2.1-alpha.
5640 - Split crypto_digest.c into NSS code, OpenSSL code, and shared
5641 code. Resolves ticket 29108.
5642 - Split control.c into several submodules, in preparation for
5643 distributing its current responsibilities throughout the codebase.
5644 Closes ticket 29894.
5645 - Start to move responsibility for knowing about periodic events to
5646 the appropriate subsystems, so that the mainloop doesn't need to
5647 know all the periodic events in the rest of the codebase.
5648 Implements tickets 30293 and 30294.
5651 - Document how to find git commits and tags for bug fixes in
5652 CodingStandards.md. Update some file documentation. Closes
5656 - Remove the linux-tor-prio.sh script from contrib/operator-tools
5657 directory. Resolves issue 29434.
5658 - Remove the obsolete OpenSUSE initscript. Resolves issue 30076.
5659 - Remove the obsolete script at contrib/dist/tor.sh.in. Resolves
5662 o Code simplification and refactoring (shell scripts):
5663 - Clean up many of our shell scripts to fix shellcheck warnings.
5664 These include autogen.sh (ticket 26069), test_keygen.sh (ticket
5665 29062), test_switch_id.sh (ticket 29065), test_rebind.sh (ticket
5666 29063), src/test/fuzz/minimize.sh (ticket 30079), test_rust.sh
5667 (ticket 29064), torify (ticket 29070), asciidoc-helper.sh (29926),
5668 fuzz_multi.sh (30077), fuzz_static_testcases.sh (ticket 29059),
5669 nagios-check-tor-authority-cert (ticket 29071),
5670 src/test/fuzz/fixup_filenames.sh (ticket 30078), test-network.sh
5671 (ticket 29060), test_key_expiration.sh (ticket 30002),
5672 zero_length_keys.sh (ticket 29068), and test_workqueue_*.sh
5675 o Testing (chutney):
5676 - In "make test-network-all", test IPv6-only v3 single onion
5677 services, using the chutney network single-onion-v23-ipv6-md.
5678 Closes ticket 27251.
5681 Changes in version 0.4.0.5 - 2019-05-02
5682 This is the first stable release in the 0.4.0.x series. It contains
5683 improvements for power management and bootstrap reporting, as well as
5684 preliminary backend support for circuit padding to prevent some kinds
5685 of traffic analysis. It also continues our work in refactoring Tor for
5686 long-term maintainability.
5688 Per our support policy, we will support the 0.4.0.x series for nine
5689 months, or until three months after the release of a stable 0.4.1.x:
5690 whichever is longer. If you need longer-term support, please stick
5691 with 0.3.5.x, which will we plan to support until Feb 2022.
5693 Below are the changes since 0.4.0.4-rc. For a complete list of changes
5694 since 0.3.5.7, see the ReleaseNotes file.
5696 o Minor features (continuous integration):
5697 - In Travis, tell timelimit to use stem's backtrace signals, and
5698 launch python directly from timelimit, so python receives the
5699 signals from timelimit, rather than make. Closes ticket 30117.
5701 o Minor features (diagnostic):
5702 - Add more diagnostic log messages in an attempt to solve the issue
5703 of NUL bytes appearing in a microdescriptor cache. Related to
5706 o Minor features (testing):
5707 - Use the approx_time() function when setting the "Expires" header
5708 in directory replies, to make them more testable. Needed for
5711 o Minor bugfixes (rust):
5712 - Abort on panic in all build profiles, instead of potentially
5713 unwinding into C code. Fixes bug 27199; bugfix on 0.3.3.1-alpha.
5715 o Minor bugfixes (shellcheck):
5716 - Look for scripts in their correct locations during "make
5717 shellcheck". Previously we had looked in the wrong place during
5718 out-of-tree builds. Fixes bug 30263; bugfix on 0.4.0.1-alpha.
5720 o Minor bugfixes (testing):
5721 - Check the time in the "Expires" header using approx_time(). Fixes
5722 bug 30001; bugfix on 0.4.0.4-rc.
5724 o Minor bugfixes (UI):
5725 - Lower log level of unlink() errors during bootstrap. Fixes bug
5726 29930; bugfix on 0.4.0.1-alpha.
5729 Changes in version 0.4.0.4-rc - 2019-04-11
5730 Tor 0.4.0.4-rc is the first release candidate in its series; it fixes
5731 several bugs from earlier versions, including some that had affected
5732 stability, and one that prevented relays from working with NSS.
5734 o Major bugfixes (NSS, relay):
5735 - When running with NSS, disable TLS 1.2 ciphersuites that use
5736 SHA384 for their PRF. Due to an NSS bug, the TLS key exporters for
5737 these ciphersuites don't work -- which caused relays to fail to
5738 handshake with one another when these ciphersuites were enabled.
5739 Fixes bug 29241; bugfix on 0.3.5.1-alpha.
5741 o Minor features (bandwidth authority):
5742 - Make bandwidth authorities ignore relays that are reported in the
5743 bandwidth file with the flag "vote=0". This change allows us to
5744 report unmeasured relays for diagnostic reasons without including
5745 their bandwidth in the bandwidth authorities' vote. Closes
5747 - When a directory authority is using a bandwidth file to obtain the
5748 bandwidth values that will be included in the next vote, serve
5749 this bandwidth file at /tor/status-vote/next/bandwidth. Closes
5752 o Minor features (circuit padding):
5753 - Stop warning about undefined behavior in the probability
5754 distribution tests. Float division by zero may technically be
5755 undefined behavior in C, but it's well defined in IEEE 754.
5756 Partial backport of 29298. Closes ticket 29527; bugfix
5759 o Minor features (continuous integration):
5760 - On Travis Rust builds, cleanup Rust registry and refrain from
5761 caching the "target/" directory to speed up builds. Resolves
5764 o Minor features (dormant mode):
5765 - Add a DormantCanceledByStartup option to tell Tor that it should
5766 treat a startup event as cancelling any previous dormant state.
5767 Integrators should use this option with caution: it should only be
5768 used if Tor is being started because of something that the user
5769 did, and not if Tor is being automatically started in the
5770 background. Closes ticket 29357.
5772 o Minor features (geoip):
5773 - Update geoip and geoip6 to the April 2 2019 Maxmind GeoLite2
5774 Country database. Closes ticket 29992.
5776 o Minor features (NSS, diagnostic):
5777 - Try to log an error from NSS (if there is any) and a more useful
5778 description of our situation if we are using NSS and a call to
5779 SSL_ExportKeyingMaterial() fails. Diagnostic for ticket 29241.
5781 o Minor bugfixes (security):
5782 - Fix a potential double free bug when reading huge bandwidth files.
5783 The issue is not exploitable in the current Tor network because
5784 the vulnerable code is only reached when directory authorities
5785 read bandwidth files, but bandwidth files come from a trusted
5786 source (usually the authorities themselves). Furthermore, the
5787 issue is only exploitable in rare (non-POSIX) 32-bit architectures,
5788 which are not used by any of the current authorities. Fixes bug
5789 30040; bugfix on 0.3.5.1-alpha. Bug found and fixed by
5791 - Verify in more places that we are not about to create a buffer
5792 with more than INT_MAX bytes, to avoid possible OOB access in the
5793 event of bugs. Fixes bug 30041; bugfix on 0.2.0.16. Found and
5794 fixed by Tobias Stoeckmann.
5796 o Minor bugfix (continuous integration):
5797 - Reset coverage state on disk after Travis CI has finished. This
5798 should prevent future coverage merge errors from causing the test
5799 suite for the "process" subsystem to fail. The process subsystem
5800 was introduced in 0.4.0.1-alpha. Fixes bug 29036; bugfix
5802 - Terminate test-stem if it takes more than 9.5 minutes to run.
5803 (Travis terminates the job after 10 minutes of no output.)
5804 Diagnostic for 29437. Fixes bug 30011; bugfix on 0.3.5.4-alpha.
5806 o Minor bugfixes (bootstrap reporting):
5807 - During bootstrap reporting, correctly distinguish pluggable
5808 transports from plain proxies. Fixes bug 28925; bugfix
5811 o Minor bugfixes (C correctness):
5812 - Fix an unlikely memory leak in consensus_diff_apply(). Fixes bug
5813 29824; bugfix on 0.3.1.1-alpha. This is Coverity warning
5816 o Minor bugfixes (circuitpadding testing):
5817 - Minor tweaks to avoid rare test failures related to timers and
5818 monotonic time. Fixes bug 29500; bugfix on 0.4.0.1-alpha.
5820 o Minor bugfixes (directory authorities):
5821 - Actually include the bandwidth-file-digest line in directory
5822 authority votes. Fixes bug 29959; bugfix on 0.4.0.2-alpha.
5824 o Minor bugfixes (logging):
5825 - On Windows, when errors cause us to reload a consensus from disk,
5826 tell the user that we are retrying at log level "notice".
5827 Previously we only logged this information at "info", which was
5828 confusing because the errors themselves were logged at "warning".
5829 Improves previous fix for 28614. Fixes bug 30004; bugfix
5832 o Minor bugfixes (pluggable transports):
5833 - Restore old behavior when it comes to discovering the path of a
5834 given Pluggable Transport executable file. A change in
5835 0.4.0.1-alpha had broken this behavior on paths containing a
5836 space. Fixes bug 29874; bugfix on 0.4.0.1-alpha.
5838 o Minor bugfixes (testing):
5839 - Backport the 0.3.4 src/test/test-network.sh to 0.2.9. We need a
5840 recent test-network.sh to use new chutney features in CI. Fixes
5841 bug 29703; bugfix on 0.2.9.1-alpha.
5842 - Fix a test failure on Windows caused by an unexpected "BUG"
5843 warning in our tests for tor_gmtime_r(-1). Fixes bug 29922; bugfix
5846 o Minor bugfixes (TLS protocol):
5847 - When classifying a client's selection of TLS ciphers, if the
5848 client ciphers are not yet available, do not cache the result.
5849 Previously, we had cached the unavailability of the cipher list
5850 and never looked again, which in turn led us to assume that the
5851 client only supported the ancient V1 link protocol. This, in turn,
5852 was causing Stem integration tests to stall in some cases. Fixes
5853 bug 30021; bugfix on 0.2.4.8-alpha.
5855 o Code simplification and refactoring:
5856 - Introduce a connection_dir_buf_add() helper function that detects
5857 whether compression is in use, and adds a string accordingly.
5858 Resolves issue 28816.
5859 - Refactor handle_get_next_bandwidth() to use
5860 connection_dir_buf_add(). Implements ticket 29897.
5863 - Clarify that Tor performs stream isolation among *Port listeners
5864 by default. Resolves issue 29121.
5867 Changes in version 0.4.0.3-alpha - 2019-03-22
5868 Tor 0.4.0.3-alpha is the third in its series; it fixes several small
5869 bugs from earlier versions.
5871 o Minor features (address selection):
5872 - Treat the subnet 100.64.0.0/10 as public for some purposes;
5873 private for others. This subnet is the RFC 6598 (Carrier Grade
5874 NAT) IP range, and is deployed by many ISPs as an alternative to
5875 RFC 1918 that does not break existing internal networks. Tor now
5876 blocks SOCKS and control ports on these addresses and warns users
5877 if client ports or ExtORPorts are listening on a RFC 6598 address.
5878 Closes ticket 28525. Patch by Neel Chauhan.
5880 o Minor features (geoip):
5881 - Update geoip and geoip6 to the March 4 2019 Maxmind GeoLite2
5882 Country database. Closes ticket 29666.
5884 o Minor bugfixes (circuitpadding):
5885 - Inspect the circuit-level cell queue before sending padding, to
5886 avoid sending padding when too much data is queued. Fixes bug
5887 29204; bugfix on 0.4.0.1-alpha.
5889 o Minor bugfixes (logging):
5890 - Correct a misleading error message when IPv4Only or IPv6Only is
5891 used but the resolved address can not be interpreted as an address
5892 of the specified IP version. Fixes bug 13221; bugfix on
5893 0.2.3.9-alpha. Patch from Kris Katterjohn.
5894 - Log the correct port number for listening sockets when "auto" is
5895 used to let Tor pick the port number. Previously, port 0 was
5896 logged instead of the actual port number. Fixes bug 29144; bugfix
5897 on 0.3.5.1-alpha. Patch from Kris Katterjohn.
5898 - Stop logging a BUG() warning when Tor is waiting for exit
5899 descriptors. Fixes bug 28656; bugfix on 0.3.5.1-alpha.
5901 o Minor bugfixes (memory management):
5902 - Refactor the shared random state's memory management so that it
5903 actually takes ownership of the shared random value pointers.
5904 Fixes bug 29706; bugfix on 0.2.9.1-alpha.
5906 o Minor bugfixes (memory management, testing):
5907 - Stop leaking parts of the shared random state in the shared-random
5908 unit tests. Fixes bug 29599; bugfix on 0.2.9.1-alpha.
5910 o Minor bugfixes (pluggable transports):
5911 - Fix an assertion failure crash bug when a pluggable transport is
5912 terminated during the bootstrap phase. Fixes bug 29562; bugfix
5915 o Minor bugfixes (Rust, protover):
5916 - Add a missing "Padding" value to the Rust implementation of
5917 protover. Fixes bug 29631; bugfix on 0.4.0.1-alpha.
5919 o Minor bugfixes (single onion services):
5920 - Allow connections to single onion services to remain idle without
5921 being disconnected. Previously, relays acting as rendezvous points
5922 for single onion services were mistakenly closing idle rendezvous
5923 circuits after 60 seconds, thinking that they were unused
5924 directory-fetching circuits that had served their purpose. Fixes
5925 bug 29665; bugfix on 0.2.1.26.
5927 o Minor bugfixes (stats):
5928 - When ExtraInfoStatistics is 0, stop including PaddingStatistics in
5929 relay and bridge extra-info documents. Fixes bug 29017; bugfix
5932 o Minor bugfixes (testing):
5933 - Downgrade some LOG_ERR messages in the address/* tests to
5934 warnings. The LOG_ERR messages were occurring when we had no
5935 configured network. We were failing the unit tests, because we
5936 backported 28668 to 0.3.5.8, but did not backport 29530. Fixes bug
5937 29530; bugfix on 0.3.5.8.
5938 - Fix our gcov wrapper script to look for object files at the
5939 correct locations. Fixes bug 29435; bugfix on 0.3.5.1-alpha.
5940 - Decrease the false positive rate of stochastic probability
5941 distribution tests. Fixes bug 29693; bugfix on 0.4.0.1-alpha.
5943 o Minor bugfixes (Windows, CI):
5944 - Skip the Appveyor 32-bit Windows Server 2016 job, and 64-bit
5945 Windows Server 2012 R2 job. The remaining 2 jobs still provide
5946 coverage of 64/32-bit, and Windows Server 2016/2012 R2. Also set
5947 fast_finish, so failed jobs terminate the build immediately. Fixes
5948 bug 29601; bugfix on 0.3.5.4-alpha.
5951 Changes in version 0.3.5.8 - 2019-02-21
5952 Tor 0.3.5.8 backports several fixes from later releases, including fixes
5953 for an annoying SOCKS-parsing bug that affected users in earlier 0.3.5.x
5956 It also includes a fix for a medium-severity security bug affecting Tor
5957 0.3.2.1-alpha and later. All Tor instances running an affected release
5958 should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
5960 o Major bugfixes (cell scheduler, KIST, security):
5961 - Make KIST consider the outbuf length when computing what it can
5962 put in the outbuf. Previously, KIST acted as though the outbuf
5963 were empty, which could lead to the outbuf becoming too full. It
5964 is possible that an attacker could exploit this bug to cause a Tor
5965 client or relay to run out of memory and crash. Fixes bug 29168;
5966 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
5967 TROVE-2019-001 and CVE-2019-8955.
5969 o Major bugfixes (networking, backport from 0.4.0.2-alpha):
5970 - Gracefully handle empty username/password fields in SOCKS5
5971 username/password auth message and allow SOCKS5 handshake to
5972 continue. Previously, we had rejected these handshakes, breaking
5973 certain applications. Fixes bug 29175; bugfix on 0.3.5.1-alpha.
5975 o Minor features (compilation, backport from 0.4.0.2-alpha):
5976 - Compile correctly when OpenSSL is built with engine support
5977 disabled, or with deprecated APIs disabled. Closes ticket 29026.
5978 Patches from "Mangix".
5980 o Minor features (geoip):
5981 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
5982 Country database. Closes ticket 29478.
5984 o Minor features (testing, backport from 0.4.0.2-alpha):
5985 - Treat all unexpected ERR and BUG messages as test failures. Closes
5988 o Minor bugfixes (onion service v3, client, backport from 0.4.0.1-alpha):
5989 - Stop logging a "BUG()" warning and stacktrace when we find a SOCKS
5990 connection waiting for a descriptor that we actually have in the
5991 cache. It turns out that this can actually happen, though it is
5992 rare. Now, tor will recover and retry the descriptor. Fixes bug
5993 28669; bugfix on 0.3.2.4-alpha.
5995 o Minor bugfixes (IPv6, backport from 0.4.0.1-alpha):
5996 - Fix tor_ersatz_socketpair on IPv6-only systems. Previously, the
5997 IPv6 socket was bound using an address family of AF_INET instead
5998 of AF_INET6. Fixes bug 28995; bugfix on 0.3.5.1-alpha. Patch from
6001 o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
6002 - Update Cargo.lock file to match the version made by the latest
6003 version of Rust, so that "make distcheck" will pass again. Fixes
6004 bug 29244; bugfix on 0.3.3.4-alpha.
6006 o Minor bugfixes (client, clock skew, backport from 0.4.0.1-alpha):
6007 - Select guards even if the consensus has expired, as long as the
6008 consensus is still reasonably live. Fixes bug 24661; bugfix
6011 o Minor bugfixes (compilation, backport from 0.4.0.1-alpha):
6012 - Compile correctly on OpenBSD; previously, we were missing some
6013 headers required in order to detect it properly. Fixes bug 28938;
6014 bugfix on 0.3.5.1-alpha. Patch from Kris Katterjohn.
6016 o Minor bugfixes (documentation, backport from 0.4.0.2-alpha):
6017 - Describe the contents of the v3 onion service client authorization
6018 files correctly: They hold public keys, not private keys. Fixes
6019 bug 28979; bugfix on 0.3.5.1-alpha. Spotted by "Felixix".
6021 o Minor bugfixes (logging, backport from 0.4.0.1-alpha):
6022 - Rework rep_hist_log_link_protocol_counts() to iterate through all
6023 link protocol versions when logging incoming/outgoing connection
6024 counts. Tor no longer skips version 5, and we won't have to
6025 remember to update this function when new link protocol version is
6026 developed. Fixes bug 28920; bugfix on 0.2.6.10.
6028 o Minor bugfixes (logging, backport from 0.4.0.2-alpha):
6029 - Log more information at "warning" level when unable to read a
6030 private key; log more information at "info" level when unable to
6031 read a public key. We had warnings here before, but they were lost
6032 during our NSS work. Fixes bug 29042; bugfix on 0.3.5.1-alpha.
6034 o Minor bugfixes (misc, backport from 0.4.0.2-alpha):
6035 - The amount of total available physical memory is now determined
6036 using the sysctl identifier HW_PHYSMEM (rather than HW_USERMEM)
6037 when it is defined and a 64-bit variant is not available. Fixes
6038 bug 28981; bugfix on 0.2.5.4-alpha. Patch from Kris Katterjohn.
6040 o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
6041 - Avoid crashing if ClientOnionAuthDir (incorrectly) contains more
6042 than one private key for a hidden service. Fixes bug 29040; bugfix
6044 - In hs_cache_store_as_client() log an HSDesc we failed to parse at
6045 "debug" level. Tor used to log it as a warning, which caused very
6046 long log lines to appear for some users. Fixes bug 29135; bugfix
6048 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
6049 as a warning. Instead, log it as a protocol warning, because there
6050 is nothing that relay operators can do to fix it. Fixes bug 29029;
6051 bugfix on 0.2.5.7-rc.
6053 o Minor bugfixes (tests, directory clients, backport from 0.4.0.1-alpha):
6054 - Mark outdated dirservers when Tor only has a reasonably live
6055 consensus. Fixes bug 28569; bugfix on 0.3.2.5-alpha.
6057 o Minor bugfixes (tests, backport from 0.4.0.2-alpha):
6058 - Detect and suppress "bug" warnings from the util/time test on
6059 Windows. Fixes bug 29161; bugfix on 0.2.9.3-alpha.
6060 - Do not log an error-level message if we fail to find an IPv6
6061 network interface from the unit tests. Fixes bug 29160; bugfix
6064 o Minor bugfixes (usability, backport from 0.4.0.1-alpha):
6065 - Stop saying "Your Guard ..." in pathbias_measure_{use,close}_rate().
6066 Some users took this phrasing to mean that the mentioned guard was
6067 under their control or responsibility, which it is not. Fixes bug
6068 28895; bugfix on Tor 0.3.0.1-alpha.
6071 Changes in version 0.3.4.11 - 2019-02-21
6072 Tor 0.3.4.11 is the third stable release in its series. It includes
6073 a fix for a medium-severity security bug affecting Tor 0.3.2.1-alpha and
6074 later. All Tor instances running an affected release should upgrade to
6075 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
6077 o Major bugfixes (cell scheduler, KIST, security):
6078 - Make KIST consider the outbuf length when computing what it can
6079 put in the outbuf. Previously, KIST acted as though the outbuf
6080 were empty, which could lead to the outbuf becoming too full. It
6081 is possible that an attacker could exploit this bug to cause a Tor
6082 client or relay to run out of memory and crash. Fixes bug 29168;
6083 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
6084 TROVE-2019-001 and CVE-2019-8955.
6086 o Minor features (geoip):
6087 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
6088 Country database. Closes ticket 29478.
6090 o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
6091 - Update Cargo.lock file to match the version made by the latest
6092 version of Rust, so that "make distcheck" will pass again. Fixes
6093 bug 29244; bugfix on 0.3.3.4-alpha.
6095 o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
6096 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
6097 as a warning. Instead, log it as a protocol warning, because there
6098 is nothing that relay operators can do to fix it. Fixes bug 29029;
6099 bugfix on 0.2.5.7-rc.
6102 Changes in version 0.3.3.12 - 2019-02-21
6103 Tor 0.3.3.12 fixes a medium-severity security bug affecting Tor
6104 0.3.2.1-alpha and later. All Tor instances running an affected release
6105 should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
6107 This release marks the end of support for the Tor 0.3.3.x series. We
6108 recommend that users switch to either the Tor 0.3.4 series (supported
6109 until at least 10 June 2019), or the Tor 0.3.5 series, which will
6110 receive long-term support until at least 1 Feb 2022.
6112 o Major bugfixes (cell scheduler, KIST, security):
6113 - Make KIST consider the outbuf length when computing what it can
6114 put in the outbuf. Previously, KIST acted as though the outbuf
6115 were empty, which could lead to the outbuf becoming too full. It
6116 is possible that an attacker could exploit this bug to cause a Tor
6117 client or relay to run out of memory and crash. Fixes bug 29168;
6118 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
6119 TROVE-2019-001 and CVE-2019-8955.
6121 o Minor features (geoip):
6122 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
6123 Country database. Closes ticket 29478.
6125 o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
6126 - Update Cargo.lock file to match the version made by the latest
6127 version of Rust, so that "make distcheck" will pass again. Fixes
6128 bug 29244; bugfix on 0.3.3.4-alpha.
6130 o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
6131 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
6132 as a warning. Instead, log it as a protocol warning, because there
6133 is nothing that relay operators can do to fix it. Fixes bug 29029;
6134 bugfix on 0.2.5.7-rc.
6137 Changes in version 0.4.0.2-alpha - 2019-02-21
6138 Tor 0.4.0.2-alpha is the second alpha in its series; it fixes several
6139 bugs from earlier versions, including several that had broken
6140 backward compatibility.
6142 It also includes a fix for a medium-severity security bug affecting Tor
6143 0.3.2.1-alpha and later. All Tor instances running an affected release
6144 should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
6146 o Major bugfixes (cell scheduler, KIST, security):
6147 - Make KIST consider the outbuf length when computing what it can
6148 put in the outbuf. Previously, KIST acted as though the outbuf
6149 were empty, which could lead to the outbuf becoming too full. It
6150 is possible that an attacker could exploit this bug to cause a Tor
6151 client or relay to run out of memory and crash. Fixes bug 29168;
6152 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
6153 TROVE-2019-001 and CVE-2019-8955.
6155 o Major bugfixes (networking):
6156 - Gracefully handle empty username/password fields in SOCKS5
6157 username/password auth messsage and allow SOCKS5 handshake to
6158 continue. Previously, we had rejected these handshakes, breaking
6159 certain applications. Fixes bug 29175; bugfix on 0.3.5.1-alpha.
6161 o Major bugfixes (windows, startup):
6162 - When reading a consensus file from disk, detect whether it was
6163 written in text mode, and re-read it in text mode if so. Always
6164 write consensus files in binary mode so that we can map them into
6165 memory later. Previously, we had written in text mode, which
6166 confused us when we tried to map the file on windows. Fixes bug
6167 28614; bugfix on 0.4.0.1-alpha.
6169 o Minor features (compilation):
6170 - Compile correctly when OpenSSL is built with engine support
6171 disabled, or with deprecated APIs disabled. Closes ticket 29026.
6172 Patches from "Mangix".
6174 o Minor features (developer tooling):
6175 - Check that bugfix versions in changes files look like Tor versions
6176 from the versions spec. Warn when bugfixes claim to be on a future
6177 release. Closes ticket 27761.
6178 - Provide a git pre-commit hook that disallows committing if we have
6179 any failures in our code and changelog formatting checks. It is
6180 now available in scripts/maint/pre-commit.git-hook. Implements
6183 o Minor features (directory authority):
6184 - When a directory authority is using a bandwidth file to obtain
6185 bandwidth values, include the digest of that file in the vote.
6186 Closes ticket 26698.
6188 o Minor features (geoip):
6189 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
6190 Country database. Closes ticket 29478.
6192 o Minor features (testing):
6193 - Treat all unexpected ERR and BUG messages as test failures. Closes
6196 o Minor bugfixes (build, compatibility, rust):
6197 - Update Cargo.lock file to match the version made by the latest
6198 version of Rust, so that "make distcheck" will pass again. Fixes
6199 bug 29244; bugfix on 0.3.3.4-alpha.
6201 o Minor bugfixes (compilation):
6202 - Fix compilation warnings in test_circuitpadding.c. Fixes bug
6203 29169; bugfix on 0.4.0.1-alpha.
6204 - Silence a compiler warning in test-memwipe.c on OpenBSD. Fixes bug
6205 29145; bugfix on 0.2.9.3-alpha. Patch from Kris Katterjohn.
6207 o Minor bugfixes (documentation):
6208 - Describe the contents of the v3 onion service client authorization
6209 files correctly: They hold public keys, not private keys. Fixes
6210 bug 28979; bugfix on 0.3.5.1-alpha. Spotted by "Felixix".
6212 o Minor bugfixes (linux seccomp sandbox):
6213 - Fix startup crash when experimental sandbox support is enabled.
6214 Fixes bug 29150; bugfix on 0.4.0.1-alpha. Patch by Peter Gerber.
6216 o Minor bugfixes (logging):
6217 - Avoid logging that we are relaxing a circuit timeout when that
6218 timeout is fixed. Fixes bug 28698; bugfix on 0.2.4.7-alpha.
6219 - Log more information at "warning" level when unable to read a
6220 private key; log more information at "info" level when unable to
6221 read a public key. We had warnings here before, but they were lost
6222 during our NSS work. Fixes bug 29042; bugfix on 0.3.5.1-alpha.
6224 o Minor bugfixes (misc):
6225 - The amount of total available physical memory is now determined
6226 using the sysctl identifier HW_PHYSMEM (rather than HW_USERMEM)
6227 when it is defined and a 64-bit variant is not available. Fixes
6228 bug 28981; bugfix on 0.2.5.4-alpha. Patch from Kris Katterjohn.
6230 o Minor bugfixes (onion services):
6231 - Avoid crashing if ClientOnionAuthDir (incorrectly) contains more
6232 than one private key for a hidden service. Fixes bug 29040; bugfix
6234 - In hs_cache_store_as_client() log an HSDesc we failed to parse at
6235 "debug" level. Tor used to log it as a warning, which caused very
6236 long log lines to appear for some users. Fixes bug 29135; bugfix
6238 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
6239 as a warning. Instead, log it as a protocol warning, because there
6240 is nothing that relay operators can do to fix it. Fixes bug 29029;
6241 bugfix on 0.2.5.7-rc.
6243 o Minor bugfixes (scheduler):
6244 - When re-adding channels to the pending list, check the correct
6245 channel's sched_heap_idx. This issue has had no effect in mainline
6246 Tor, but could have led to bugs down the road in improved versions
6247 of our circuit scheduling code. Fixes bug 29508; bugfix
6250 o Minor bugfixes (tests):
6251 - Fix intermittent failures on an adaptive padding test. Fixes one
6252 case of bug 29122; bugfix on 0.4.0.1-alpha.
6253 - Disable an unstable circuit-padding test that was failing
6254 intermittently because of an ill-defined small histogram. Such
6255 histograms will be allowed again after 29298 is implemented. Fixes
6256 a second case of bug 29122; bugfix on 0.4.0.1-alpha.
6257 - Detect and suppress "bug" warnings from the util/time test on
6258 Windows. Fixes bug 29161; bugfix on 0.2.9.3-alpha.
6259 - Do not log an error-level message if we fail to find an IPv6
6260 network interface from the unit tests. Fixes bug 29160; bugfix
6264 - In the manpage entry describing MapAddress torrc setting, use
6265 example IP addresses from ranges specified for use in documentation
6266 by RFC 5737. Resolves issue 28623.
6269 - Remove the old check-tor script. Resolves issue 29072.
6272 Changes in version 0.4.0.1-alpha - 2019-01-18
6273 Tor 0.4.0.1-alpha is the first release in the new 0.4.0.x series. It
6274 introduces improved features for power and bandwidth conservation,
6275 more accurate reporting of bootstrap progress for user interfaces, and
6276 an experimental backend for an exciting new adaptive padding feature.
6277 There is also the usual assortment of bugfixes and minor features, all
6280 o Major features (battery management, client, dormant mode):
6281 - When Tor is running as a client, and it is unused for a long time,
6282 it can now enter a "dormant" state. When Tor is dormant, it avoids
6283 network and CPU activity until it is reawoken either by a user
6284 request or by a controller command. For more information, see the
6285 configuration options starting with "Dormant". Implements tickets
6287 - The client's memory of whether it is "dormant", and how long it
6288 has spent idle, persists across invocations. Implements
6290 - There is a DormantOnFirstStartup option that integrators can use
6291 if they expect that in many cases, Tor will be installed but
6294 o Major features (bootstrap reporting):
6295 - When reporting bootstrap progress, report the first connection
6296 uniformly, regardless of whether it's a connection for building
6297 application circuits. This allows finer-grained reporting of early
6298 progress than previously possible, with the improvements of ticket
6299 27169. Closes tickets 27167 and 27103. Addresses ticket 27308.
6300 - When reporting bootstrap progress, treat connecting to a proxy or
6301 pluggable transport as separate from having successfully used that
6302 proxy or pluggable transport to connect to a relay. Closes tickets
6305 o Major features (circuit padding):
6306 - Implement preliminary support for the circuit padding portion of
6307 Proposal 254. The implementation supports Adaptive Padding (aka
6308 WTF-PAD) state machines for use between experimental clients and
6309 relays. Support is also provided for APE-style state machines that
6310 use probability distributions instead of histograms to specify
6311 inter-packet delay. At the moment, Tor does not provide any
6312 padding state machines that are used in normal operation: for now,
6313 this feature exists solely for experimentation. Closes
6316 o Major features (refactoring):
6317 - Tor now uses an explicit list of its own subsystems when
6318 initializing and shutting down. Previously, these systems were
6319 managed implicitly in various places throughout the codebase.
6320 (There may still be some subsystems using the old system.) Closes
6323 o Minor features (bootstrap reporting):
6324 - When reporting bootstrap progress, stop distinguishing between
6325 situations where only internal paths are available and situations
6326 where external paths are available. Previously, Tor would often
6327 erroneously report that it had only internal paths. Closes
6330 o Minor features (continuous integration):
6331 - Log Python version during each Travis CI job. Resolves
6334 o Minor features (controller):
6335 - Add a DROPOWNERSHIP command to undo the effects of TAKEOWNERSHIP.
6336 Implements ticket 28843.
6338 o Minor features (developer tooling):
6339 - Provide a git hook script to prevent "fixup!" and "squash!"
6340 commits from ending up in the master branch, as scripts/main/pre-
6341 push.git-hook. Closes ticket 27993.
6343 o Minor features (directory authority):
6344 - Directory authorities support a new consensus algorithm, under
6345 which the family lines in microdescriptors are encoded in a
6346 canonical form. This change makes family lines more compressible
6347 in transit, and on the client. Closes ticket 28266; implements
6350 o Minor features (directory authority, relay):
6351 - Authorities now vote on a "StaleDesc" flag to indicate that a
6352 relay's descriptor is so old that the relay should upload again
6353 soon. Relays treat this flag as a signal to upload a new
6354 descriptor. This flag will eventually let us remove the
6355 'published' date from routerstatus entries, and make our consensus
6356 diffs much smaller. Closes ticket 26770; implements proposal 293.
6358 o Minor features (fallback directory mirrors):
6359 - Update the fallback whitelist based on operator opt-ins and opt-
6360 outs. Closes ticket 24805, patch by Phoul.
6362 o Minor features (FreeBSD):
6363 - On FreeBSD-based systems, warn relay operators if the
6364 "net.inet.ip.random_id" sysctl (IP ID randomization) is disabled.
6365 Closes ticket 28518.
6367 o Minor features (HTTP standards compliance):
6368 - Stop sending the header "Content-type: application/octet-stream"
6369 along with transparently compressed documents: this confused
6370 browsers. Closes ticket 28100.
6372 o Minor features (IPv6):
6373 - We add an option ClientAutoIPv6ORPort, to make clients randomly
6374 prefer a node's IPv4 or IPv6 ORPort. The random preference is set
6375 every time a node is loaded from a new consensus or bridge config.
6376 We expect that this option will enable clients to bootstrap more
6377 quickly without having to determine whether they support IPv4,
6378 IPv6, or both. Closes ticket 27490. Patch by Neel Chauhan.
6379 - When using addrs_in_same_network_family(), avoid choosing circuit
6380 paths that pass through the same IPv6 subnet more than once.
6381 Previously, we only checked IPv4 subnets. Closes ticket 24393.
6382 Patch by Neel Chauhan.
6384 o Minor features (log messages):
6385 - Improve log message in v3 onion services that could print out
6386 negative revision counters. Closes ticket 27707. Patch
6389 o Minor features (memory usage):
6390 - Save memory by storing microdescriptor family lists with a more
6391 compact representation. Closes ticket 27359.
6392 - Tor clients now use mmap() to read consensus files from disk, so
6393 that they no longer need keep the full text of a consensus in
6394 memory when parsing it or applying a diff. Closes ticket 27244.
6396 o Minor features (parsing):
6397 - Directory authorities now validate that router descriptors and
6398 ExtraInfo documents are in a valid subset of UTF-8, and reject
6399 them if they are not. Closes ticket 27367.
6401 o Minor features (performance):
6402 - Cache the results of summarize_protocol_flags(), so that we don't
6403 have to parse the same protocol-versions string over and over.
6404 This should save us a huge number of malloc calls on startup, and
6405 may reduce memory fragmentation with some allocators. Closes
6407 - Remove a needless memset() call from get_token_arguments, thereby
6408 speeding up the tokenization of directory objects by about 20%.
6409 Closes ticket 28852.
6410 - Replace parse_short_policy() with a faster implementation, to
6411 improve microdescriptor parsing time. Closes ticket 28853.
6412 - Speed up directory parsing a little by avoiding use of the non-
6413 inlined strcmp_len() function. Closes ticket 28856.
6414 - Speed up microdescriptor parsing by about 30%, to help improve
6415 startup time. Closes ticket 28839.
6417 o Minor features (pluggable transports):
6418 - Add support for emitting STATUS updates to Tor's control port from
6419 a pluggable transport process. Closes ticket 28846.
6420 - Add support for logging to Tor's logging subsystem from a
6421 pluggable transport process. Closes ticket 28180.
6423 o Minor features (process management):
6424 - Add a new process API for handling child processes. This new API
6425 allows Tor to have bi-directional communication with child
6426 processes on both Unix and Windows. Closes ticket 28179.
6427 - Use the subsystem manager to initialize and shut down the process
6428 module. Closes ticket 28847.
6430 o Minor features (relay):
6431 - When listing relay families, list them in canonical form including
6432 the relay's own identity, and try to give a more useful set of
6433 warnings. Part of ticket 28266 and proposal 298.
6435 o Minor features (required protocols):
6436 - Before exiting because of a missing required protocol, Tor will
6437 now check the publication time of the consensus, and not exit
6438 unless the consensus is newer than the Tor program's own release
6439 date. Previously, Tor would not check the consensus publication
6440 time, and so might exit because of a missing protocol that might
6441 no longer be required in a current consensus. Implements proposal
6442 297; closes ticket 27735.
6444 o Minor features (testing):
6445 - Allow a HeartbeatPeriod of less than 30 minutes in testing Tor
6446 networks. Closes ticket 28840. Patch by Rob Jansen.
6448 o Minor bugfixes (client, clock skew):
6449 - Bootstrap successfully even when Tor's clock is behind the clocks
6450 on the authorities. Fixes bug 28591; bugfix on 0.2.0.9-alpha.
6451 - Select guards even if the consensus has expired, as long as the
6452 consensus is still reasonably live. Fixes bug 24661; bugfix
6455 o Minor bugfixes (compilation):
6456 - Compile correctly on OpenBSD; previously, we were missing some
6457 headers required in order to detect it properly. Fixes bug 28938;
6458 bugfix on 0.3.5.1-alpha. Patch from Kris Katterjohn.
6460 o Minor bugfixes (directory clients):
6461 - Mark outdated dirservers when Tor only has a reasonably live
6462 consensus. Fixes bug 28569; bugfix on 0.3.2.5-alpha.
6464 o Minor bugfixes (directory mirrors):
6465 - Even when a directory mirror's clock is behind the clocks on the
6466 authorities, we now allow the mirror to serve "future"
6467 consensuses. Fixes bug 28654; bugfix on 0.3.0.1-alpha.
6469 o Minor bugfixes (DNS):
6470 - Gracefully handle an empty or absent resolve.conf file by falling
6471 back to using "localhost" as a DNS server (and hoping it works).
6472 Previously, we would just stop running as an exit. Fixes bug
6473 21900; bugfix on 0.2.1.10-alpha.
6475 o Minor bugfixes (guards):
6476 - In count_acceptable_nodes(), the minimum number is now one bridge
6477 or guard node, and two non-guard nodes for a circuit. Previously,
6478 we had added up the sum of all nodes with a descriptor, but that
6479 could cause us to build failing circuits when we had either too
6480 many bridges or not enough guard nodes. Fixes bug 25885; bugfix on
6481 0.2.3.1-alpha. Patch by Neel Chauhan.
6483 o Minor bugfixes (IPv6):
6484 - Fix tor_ersatz_socketpair on IPv6-only systems. Previously, the
6485 IPv6 socket was bound using an address family of AF_INET instead
6486 of AF_INET6. Fixes bug 28995; bugfix on 0.3.5.1-alpha. Patch from
6489 o Minor bugfixes (logging):
6490 - Rework rep_hist_log_link_protocol_counts() to iterate through all
6491 link protocol versions when logging incoming/outgoing connection
6492 counts. Tor no longer skips version 5, and we won't have to
6493 remember to update this function when new link protocol version is
6494 developed. Fixes bug 28920; bugfix on 0.2.6.10.
6496 o Minor bugfixes (networking):
6497 - Introduce additional checks into tor_addr_parse() to reject
6498 certain incorrect inputs that previously were not detected. Fixes
6499 bug 23082; bugfix on 0.2.0.10-alpha.
6501 o Minor bugfixes (onion service v3, client):
6502 - Stop logging a "BUG()" warning and stacktrace when we find a SOCKS
6503 connection waiting for a descriptor that we actually have in the
6504 cache. It turns out that this can actually happen, though it is
6505 rare. Now, tor will recover and retry the descriptor. Fixes bug
6506 28669; bugfix on 0.3.2.4-alpha.
6508 o Minor bugfixes (periodic events):
6509 - Refrain from calling routerlist_remove_old_routers() from
6510 check_descriptor_callback(). Instead, create a new hourly periodic
6511 event. Fixes bug 27929; bugfix on 0.2.8.1-alpha.
6513 o Minor bugfixes (pluggable transports):
6514 - Make sure that data is continously read from standard output and
6515 standard error pipes of a pluggable transport child-process, to
6516 avoid deadlocking when a pipe's buffer is full. Fixes bug 26360;
6517 bugfix on 0.2.3.6-alpha.
6519 o Minor bugfixes (unit tests):
6520 - Instead of relying on hs_free_all() to clean up all onion service
6521 objects in test_build_descriptors(), we now deallocate them one by
6522 one. This lets Coverity know that we are not leaking memory there
6523 and fixes CID 1442277. Fixes bug 28989; bugfix on 0.3.5.1-alpha.
6525 o Minor bugfixes (usability):
6526 - Stop saying "Your Guard ..." in pathbias_measure_{use,close}_rate().
6527 Some users took this phrasing to mean that the mentioned guard was
6528 under their control or responsibility, which it is not. Fixes bug
6529 28895; bugfix on Tor 0.3.0.1-alpha.
6531 o Code simplification and refactoring:
6532 - Reimplement NETINFO cell parsing and generation to rely on
6533 trunnel-generated wire format handling code. Closes ticket 27325.
6534 - Remove unnecessary unsafe code from the Rust macro "cstr!". Closes
6536 - Rework SOCKS wire format handling to rely on trunnel-generated
6537 parsing/generation code. Resolves ticket 27620.
6538 - Split out bootstrap progress reporting from control.c into a
6539 separate file. Part of ticket 27402.
6540 - The .may_include files that we use to describe our directory-by-
6541 directory dependency structure now describe a noncircular
6542 dependency graph over the directories that they cover. Our
6543 checkIncludes.py tool now enforces this noncircularity. Closes
6547 - Mention that you cannot add a new onion service if Tor is already
6548 running with Sandbox enabled. Closes ticket 28560.
6549 - Improve ControlPort documentation. Mention that it accepts
6550 address:port pairs, and can be used multiple times. Closes
6552 - Document the exact output of "tor --version". Closes ticket 28889.
6555 - Stop responding to the 'GETINFO status/version/num-concurring' and
6556 'GETINFO status/version/num-versioning' control port commands, as
6557 those were deprecated back in 0.2.0.30. Also stop listing them in
6558 output of 'GETINFO info/names'. Resolves ticket 28757.
6559 - The scripts used to generate and maintain the list of fallback
6560 directories have been extracted into a new "fallback-scripts"
6561 repository. Closes ticket 27914.
6564 - Run shellcheck for scripts in the in scripts/ directory. Closes
6566 - Add unit tests for tokenize_string() and get_next_token()
6567 functions. Resolves ticket 27625.
6569 o Code simplification and refactoring (onion service v3):
6570 - Consolidate the authorized client descriptor cookie computation
6571 code from client and service into one function. Closes
6574 o Code simplification and refactoring (shell scripts):
6575 - Cleanup scan-build.sh to silence shellcheck warnings. Closes
6577 - Fix issues that shellcheck found in chutney-git-bisect.sh.
6578 Resolves ticket 28006.
6579 - Fix issues that shellcheck found in updateRustDependencies.sh.
6580 Resolves ticket 28012.
6581 - Fix shellcheck warnings in cov-diff script. Resolves issue 28009.
6582 - Fix shellcheck warnings in run_calltool.sh. Resolves ticket 28011.
6583 - Fix shellcheck warnings in run_trunnel.sh. Resolves issue 28010.
6584 - Fix shellcheck warnings in scripts/test/coverage. Resolves
6588 Changes in version 0.3.3.11 - 2019-01-07
6589 Tor 0.3.3.11 backports numerous fixes from later versions of Tor.
6590 numerous fixes, including an important fix for anyone using OpenSSL
6591 1.1.1. Anyone running an earlier version of Tor 0.3.3 should upgrade
6592 to this version, or to a later series.
6594 As a reminder, support the Tor 0.3.3 series will end on 22 Feb 2019.
6595 We anticipate that this will be the last release of Tor 0.3.3, unless
6596 some major bug is before then. Some time between now and then, users
6597 should switch to either the Tor 0.3.4 series (supported until at least
6598 10 June 2019), or the Tor 0.3.5 series, which will receive long-term
6599 support until at least 1 Feb 2022.
6601 o Major bugfixes (OpenSSL, portability, backport from 0.3.5.5-alpha):
6602 - Fix our usage of named groups when running as a TLS 1.3 client in
6603 OpenSSL 1.1.1. Previously, we only initialized EC groups when
6604 running as a relay, which caused clients to fail to negotiate TLS
6605 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
6608 o Major bugfixes (restart-in-process, backport from 0.3.5.1-alpha):
6609 - Fix a use-after-free error that could be caused by passing Tor an
6610 impossible set of options that would fail during options_act().
6611 Fixes bug 27708; bugfix on 0.3.3.1-alpha.
6613 o Minor features (continuous integration, backport from 0.3.5.1-alpha):
6614 - Only run one online rust build in Travis, to reduce network
6615 errors. Skip offline rust builds on Travis for Linux gcc, because
6616 they're redundant. Implements ticket 27252.
6617 - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
6618 duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
6619 Linux with default settings, because all the non-default builds
6620 use gcc on Linux. Implements ticket 27252.
6622 o Minor features (continuous integration, backport from 0.3.5.3-alpha):
6623 - Use the Travis Homebrew addon to install packages on macOS during
6624 Travis CI. The package list is the same, but the Homebrew addon
6625 does not do a `brew update` by default. Implements ticket 27738.
6627 o Minor features (fallback directory list, backport from 0.3.5.6-rc):
6628 - Replace the 150 fallbacks originally introduced in Tor
6629 0.3.3.1-alpha in January 2018 (of which ~115 were still
6630 functional), with a list of 157 fallbacks (92 new, 65 existing, 85
6631 removed) generated in December 2018. Closes ticket 24803.
6633 o Minor features (geoip):
6634 - Update geoip and geoip6 to the January 3 2019 Maxmind GeoLite2
6635 Country database. Closes ticket 29012.
6637 o Minor features (OpenSSL bug workaround, backport from 0.3.5.7):
6638 - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
6639 key export function from handling long labels. When this bug is
6640 detected, Tor will disable TLS 1.3. We recommend upgrading to a
6641 version of OpenSSL without this bug when it becomes available.
6642 Closes ticket 28973.
6644 o Minor bugfixes (relay statistics, backport from 0.3.5.7):
6645 - Update relay descriptor on bandwidth changes only when the uptime
6646 is smaller than 24h, in order to reduce the efficiency of guard
6647 discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
6649 o Minor bugfixes (C correctness, backport from 0.3.5.4-alpha):
6650 - Avoid undefined behavior in an end-of-string check when parsing
6651 the BEGIN line in a directory object. Fixes bug 28202; bugfix
6654 o Minor bugfixes (code safety, backport from 0.3.5.3-alpha):
6655 - Rewrite our assertion macros so that they no longer suppress the
6656 compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
6658 o Minor bugfixes (compilation, backport from 0.3.5.5-alpha):
6659 - Initialize a variable unconditionally in aes_new_cipher(), since
6660 some compilers cannot tell that we always initialize it before
6661 use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
6663 o Minor bugfixes (directory authority, backport from 0.3.5.4-alpha):
6664 - Log additional info when we get a relay that shares an ed25519 ID
6665 with a different relay, instead making a BUG() warning. Fixes bug
6666 27800; bugfix on 0.3.2.1-alpha.
6668 o Minor bugfixes (directory permissions, backport form 0.3.5.3-alpha):
6669 - When a user requests a group-readable DataDirectory, give it to
6670 them. Previously, when the DataDirectory and the CacheDirectory
6671 were the same, the default setting (0) for
6672 CacheDirectoryGroupReadable would override the setting for
6673 DataDirectoryGroupReadable. Fixes bug 26913; bugfix
6676 o Minor bugfixes (onion service v3, backport from 0.3.5.1-alpha):
6677 - When the onion service directory can't be created or has the wrong
6678 permissions, do not log a stack trace. Fixes bug 27335; bugfix
6681 o Minor bugfixes (onion service v3, backport from 0.3.5.2-alpha):
6682 - Close all SOCKS request (for the same .onion) if the newly fetched
6683 descriptor is unusable. Before that, we would close only the first
6684 one leaving the other hanging and let to time out by themselves.
6685 Fixes bug 27410; bugfix on 0.3.2.1-alpha.
6687 o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
6688 - Don't warn so loudly when Tor is unable to decode an onion
6689 descriptor. This can now happen as a normal use case if a client
6690 gets a descriptor with client authorization but the client is not
6691 authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
6693 o Minor bugfixes (onion service v3, backport from 0.3.5.6-rc):
6694 - When deleting an ephemeral onion service (DEL_ONION), do not close
6695 any rendezvous circuits in order to let the existing client
6696 connections finish by themselves or closed by the application. The
6697 HS v2 is doing that already so now we have the same behavior for
6698 all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
6700 o Minor bugfixes (HTTP tunnel):
6701 - Fix a bug warning when closing an HTTP tunnel connection due to
6702 an HTTP request we couldn't handle. Fixes bug 26470; bugfix on
6705 o Minor bugfixes (memory leaks, backport from 0.3.5.5-alpha):
6706 - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
6707 bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
6709 o Minor bugfixes (netflow padding, backport from 0.3.5.1-alpha):
6710 - Ensure circuitmux queues are empty before scheduling or sending
6711 padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
6713 o Minor bugfixes (protover, backport from 0.3.5.3-alpha):
6714 - Reject protocol names containing bytes other than alphanumeric
6715 characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
6718 o Minor bugfixes (rust, backport from 0.3.5.1-alpha):
6719 - Compute protover votes correctly in the rust version of the
6720 protover code. Previously, the protover rewrite in 24031 allowed
6721 repeated votes from the same voter for the same protocol version
6722 to be counted multiple times in protover_compute_vote(). Fixes bug
6723 27649; bugfix on 0.3.3.5-rc.
6724 - Reject protover names that contain invalid characters. Fixes bug
6725 27687; bugfix on 0.3.3.1-alpha.
6727 o Minor bugfixes (rust, backport from 0.3.5.2-alpha):
6728 - protover_all_supported() would attempt to allocate up to 16GB on
6729 some inputs, leading to a potential memory DoS. Fixes bug 27206;
6730 bugfix on 0.3.3.5-rc.
6732 o Minor bugfixes (rust, backport from 0.3.5.4-alpha):
6733 - Fix a potential null dereference in protover_all_supported(). Add
6734 a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
6735 - Return a string that can be safely freed by C code, not one
6736 created by the rust allocator, in protover_all_supported(). Fixes
6737 bug 27740; bugfix on 0.3.3.1-alpha.
6738 - Fix an API mismatch in the rust implementation of
6739 protover_compute_vote(). This bug could have caused crashes on any
6740 directory authorities running Tor with Rust (which we do not yet
6741 recommend). Fixes bug 27741; bugfix on 0.3.3.6.
6743 o Minor bugfixes (testing, backport from 0.3.5.1-alpha):
6744 - If a unit test running in a subprocess exits abnormally or with a
6745 nonzero status code, treat the test as having failed, even if the
6746 test reported success. Without this fix, memory leaks don't cause
6747 the tests to fail, even with LeakSanitizer. Fixes bug 27658;
6748 bugfix on 0.2.2.4-alpha.
6750 o Minor bugfixes (testing, backport from 0.3.5.4-alpha):
6751 - Treat backtrace test failures as expected on BSD-derived systems
6752 (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
6753 (FreeBSD failures have been treated as expected since 18204 in
6754 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
6756 o Minor bugfixes (unit tests, guard selection, backport from 0.3.5.6-rc):
6757 - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
6758 bugfix on 0.3.0.1-alpha.
6761 Changes in version 0.3.4.10 - 2019-01-07
6762 Tor 0.3.4.9 is the second stable release in its series; it backports
6763 numerous fixes, including an important fix for relays, and for anyone
6764 using OpenSSL 1.1.1. Anyone running an earlier version of Tor 0.3.4
6767 As a reminder, the Tor 0.3.4 series will be supported until 10 June
6768 2019. Some time between now and then, users should switch to the Tor
6769 0.3.5 series, which will receive long-term support until at least 1
6772 o Major bugfixes (OpenSSL, portability, backport from 0.3.5.5-alpha):
6773 - Fix our usage of named groups when running as a TLS 1.3 client in
6774 OpenSSL 1.1.1. Previously, we only initialized EC groups when
6775 running as a relay, which caused clients to fail to negotiate TLS
6776 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
6779 o Major bugfixes (relay, directory, backport from 0.3.5.7):
6780 - Always reactivate linked connections in the main loop so long as
6781 any linked connection has been active. Previously, connections
6782 serving directory information wouldn't get reactivated after the
6783 first chunk of data was sent (usually 32KB), which would prevent
6784 clients from bootstrapping. Fixes bug 28912; bugfix on
6785 0.3.4.1-alpha. Patch by "cypherpunks3".
6787 o Minor features (continuous integration, Windows, backport from 0.3.5.6-rc):
6788 - Always show the configure and test logs, and upload them as build
6789 artifacts, when building for Windows using Appveyor CI.
6792 o Minor features (controller, backport from 0.3.5.1-alpha):
6793 - For purposes of CIRC_BW-based dropped cell detection, track half-
6794 closed stream ids, and allow their ENDs, SENDMEs, DATA and path
6795 bias check cells to arrive without counting it as dropped until
6796 either the END arrives, or the windows are empty. Closes
6799 o Minor features (fallback directory list, backport from 0.3.5.6-rc):
6800 - Replace the 150 fallbacks originally introduced in Tor
6801 0.3.3.1-alpha in January 2018 (of which ~115 were still
6802 functional), with a list of 157 fallbacks (92 new, 65 existing, 85
6803 removed) generated in December 2018. Closes ticket 24803.
6805 o Minor features (geoip):
6806 - Update geoip and geoip6 to the November 6 2018 Maxmind GeoLite2
6807 Country database. Closes ticket 28395.
6809 o Minor features (OpenSSL bug workaround, backport from 0.3.5.7):
6810 - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
6811 key export function from handling long labels. When this bug is
6812 detected, Tor will disable TLS 1.3. We recommend upgrading to a
6813 version of OpenSSL without this bug when it becomes available.
6814 Closes ticket 28973.
6816 o Minor bugfixes (compilation, backport from 0.3.5.5-alpha):
6817 - Initialize a variable unconditionally in aes_new_cipher(), since
6818 some compilers cannot tell that we always initialize it before
6819 use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
6821 o Minor bugfixes (connection, relay, backport from 0.3.5.5-alpha):
6822 - Avoid a logging a BUG() stacktrace when closing connection held
6823 open because the write side is rate limited but not the read side.
6824 Now, the connection read side is simply shut down until Tor is
6825 able to flush the connection and close it. Fixes bug 27750; bugfix
6828 o Minor bugfixes (continuous integration, Windows, backport from 0.3.5.5-alpha):
6829 - Manually configure the zstd compiler options, when building using
6830 mingw on Appveyor Windows CI. The MSYS2 mingw zstd package does
6831 not come with a pkg-config file. Fixes bug 28454; bugfix
6833 - Stop using an external OpenSSL install, and stop installing MSYS2
6834 packages, when building using mingw on Appveyor Windows CI. Fixes
6835 bug 28399; bugfix on 0.3.4.1-alpha.
6837 o Minor bugfixes (continuous integration, Windows, backport from 0.3.5.6-rc):
6838 - Explicitly specify the path to the OpenSSL library and do not
6839 download OpenSSL from Pacman, but instead use the library that is
6840 already provided by AppVeyor. Fixes bug 28574; bugfix on master.
6842 o Minor bugfixes (directory permissions, backport form 0.3.5.3-alpha):
6843 - When a user requests a group-readable DataDirectory, give it to
6844 them. Previously, when the DataDirectory and the CacheDirectory
6845 were the same, the default setting (0) for
6846 CacheDirectoryGroupReadable would override the setting for
6847 DataDirectoryGroupReadable. Fixes bug 26913; bugfix
6850 o Minor bugfixes (memory leaks, backport from 0.3.5.5-alpha):
6851 - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
6852 bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
6854 o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
6855 - Don't warn so loudly when Tor is unable to decode an onion
6856 descriptor. This can now happen as a normal use case if a client
6857 gets a descriptor with client authorization but the client is not
6858 authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
6860 o Minor bugfixes (onion service v3, backport from 0.3.5.6-rc):
6861 - When deleting an ephemeral onion service (DEL_ONION), do not close
6862 any rendezvous circuits in order to let the existing client
6863 connections finish by themselves or closed by the application. The
6864 HS v2 is doing that already so now we have the same behavior for
6865 all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
6867 o Minor bugfixes (relay statistics, backport from 0.3.5.7):
6868 - Update relay descriptor on bandwidth changes only when the uptime
6869 is smaller than 24h, in order to reduce the efficiency of guard
6870 discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
6872 o Minor bugfixes (unit tests, guard selection, backport from 0.3.5.6-rc):
6873 - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
6874 bugfix on 0.3.0.1-alpha.
6877 Changes in version 0.3.5.7 - 2019-01-07
6878 Tor 0.3.5.7 is the first stable release in its series; it includes
6879 compilation and portability fixes, and a fix for a severe problem
6880 affecting directory caches.
6882 The Tor 0.3.5 series includes several new features and performance
6883 improvements, including client authorization for v3 onion services,
6884 cleanups to bootstrap reporting, support for improved bandwidth-
6885 measurement tools, experimental support for NSS in place of OpenSSL,
6886 and much more. It also begins a full reorganization of Tor's code
6887 layout, for improved modularity and maintainability in the future.
6888 Finally, there is the usual set of performance improvements and
6889 bugfixes that we try to do in every release series.
6891 There are a couple of changes in the 0.3.5 that may affect
6892 compatibility. First, the default version for newly created onion
6893 services is now v3. Use the HiddenServiceVersion option if you want to
6894 override this. Second, some log messages related to bootstrapping have
6895 changed; if you use stem, you may need to update to the latest version
6896 so it will recognize them.
6898 We have designated 0.3.5 as a "long-term support" (LTS) series: we
6899 will continue to patch major bugs in typical configurations of 0.3.5
6900 until at least 1 Feb 2022. (We do not plan to provide long-term
6901 support for embedding, Rust support, NSS support, running a directory
6902 authority, or unsupported platforms. For these, you will need to stick
6903 with the latest stable release.)
6905 Below are the changes since 0.3.5.6-rc. For a complete list of changes
6906 since 0.3.4.9, see the ReleaseNotes file.
6908 o Major bugfixes (relay, directory):
6909 - Always reactivate linked connections in the main loop so long as
6910 any linked connection has been active. Previously, connections
6911 serving directory information wouldn't get reactivated after the
6912 first chunk of data was sent (usually 32KB), which would prevent
6913 clients from bootstrapping. Fixes bug 28912; bugfix on
6914 0.3.4.1-alpha. Patch by "cypherpunks3".
6916 o Minor features (compilation):
6917 - When possible, place our warning flags in a separate file, to
6918 avoid flooding verbose build logs. Closes ticket 28924.
6920 o Minor features (geoip):
6921 - Update geoip and geoip6 to the January 3 2019 Maxmind GeoLite2
6922 Country database. Closes ticket 29012.
6924 o Minor features (OpenSSL bug workaround):
6925 - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
6926 key export function from handling long labels. When this bug is
6927 detected, Tor will disable TLS 1.3. We recommend upgrading to a
6928 version of OpenSSL without this bug when it becomes available.
6929 Closes ticket 28973.
6931 o Minor features (performance):
6932 - Remove about 96% of the work from the function that we run at
6933 startup to test our curve25519_basepoint implementation. Since
6934 this function has yet to find an actual failure, we now only run
6935 it for 8 iterations instead of 200. Based on our profile
6936 information, this change should save around 8% of our startup time
6937 on typical desktops, and may have a similar effect on other
6938 platforms. Closes ticket 28838.
6939 - Stop re-validating our hardcoded Diffie-Hellman parameters on
6940 every startup. Doing this wasted time and cycles, especially on
6941 low-powered devices. Closes ticket 28851.
6943 o Minor bugfixes (compilation):
6944 - Fix compilation for Android by adding a missing header to
6945 freespace.c. Fixes bug 28974; bugfix on 0.3.5.1-alpha.
6947 o Minor bugfixes (correctness):
6948 - Fix an unreached code path where we checked the value of
6949 "hostname" inside send_resolved_hostname_cell(). Previously, we
6950 used it before checking it; now we check it first. Fixes bug
6951 28879; bugfix on 0.1.2.7-alpha.
6953 o Minor bugfixes (testing):
6954 - Make sure that test_rebind.py actually obeys its timeout, even
6955 when it receives a large number of log messages. Fixes bug 28883;
6956 bugfix on 0.3.5.4-alpha.
6957 - Stop running stem's unit tests as part of "make test-stem", but
6958 continue to run stem's unit and online tests during "make test-
6959 stem-full". Fixes bug 28568; bugfix on 0.2.6.3-alpha.
6961 o Minor bugfixes (windows services):
6962 - Make Tor start correctly as an NT service again: previously it was
6963 broken by refactoring. Fixes bug 28612; bugfix on 0.3.5.3-alpha.
6965 o Code simplification and refactoring:
6966 - When parsing a port configuration, make it more obvious to static
6967 analyzer tools that we always initialize the address. Closes
6971 Changes in version 0.3.5.6-rc - 2018-12-18
6972 Tor 0.3.5.6-rc fixes numerous small bugs in earlier versions of Tor.
6973 It is the first release candidate in the 0.3.5.x series; if no further
6974 huge bugs are found, our next release may be the stable 0.3.5.x.
6976 o Minor features (continuous integration, Windows):
6977 - Always show the configure and test logs, and upload them as build
6978 artifacts, when building for Windows using Appveyor CI.
6981 o Minor features (fallback directory list):
6982 - Replace the 150 fallbacks originally introduced in Tor
6983 0.3.3.1-alpha in January 2018 (of which ~115 were still
6984 functional), with a list of 157 fallbacks (92 new, 65 existing, 85
6985 removed) generated in December 2018. Closes ticket 24803.
6987 o Minor features (geoip):
6988 - Update geoip and geoip6 to the December 5 2018 Maxmind GeoLite2
6989 Country database. Closes ticket 28744.
6991 o Minor bugfixes (compilation):
6992 - Add missing dependency on libgdi32.dll for tor-print-ed-signing-
6993 cert.exe on Windows. Fixes bug 28485; bugfix on 0.3.5.1-alpha.
6995 o Minor bugfixes (continuous integration, Windows):
6996 - Explicitly specify the path to the OpenSSL library and do not
6997 download OpenSSL from Pacman, but instead use the library that is
6998 already provided by AppVeyor. Fixes bug 28574; bugfix on master.
7000 o Minor bugfixes (onion service v3):
7001 - When deleting an ephemeral onion service (DEL_ONION), do not close
7002 any rendezvous circuits in order to let the existing client
7003 connections finish by themselves or closed by the application. The
7004 HS v2 is doing that already so now we have the same behavior for
7005 all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
7007 o Minor bugfixes (restart-in-process, boostrap):
7008 - Add missing resets of bootstrap tracking state when shutting down
7009 (regression caused by ticket 27169). Fixes bug 28524; bugfix
7012 o Minor bugfixes (testing):
7013 - Use a separate DataDirectory for the test_rebind script.
7014 Previously, this script would run using the default DataDirectory,
7015 and sometimes fail. Fixes bug 28562; bugfix on 0.3.5.1-alpha.
7016 Patch from Taylor R Campbell.
7017 - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
7018 bugfix on 0.3.0.1-alpha.
7020 o Minor bugfixes (Windows):
7021 - Correctly identify Windows 8.1, Windows 10, and Windows Server
7022 2008 and later from their NT versions. Fixes bug 28096; bugfix on
7023 0.2.2.34; reported by Keifer Bly.
7024 - On recent Windows versions, the GetVersionEx() function may report
7025 an earlier Windows version than the running OS. To avoid user
7026 confusion, add "[or later]" to Tor's version string on affected
7027 versions of Windows. Fixes bug 28096; bugfix on 0.2.2.34; reported
7029 - Remove Windows versions that were never supported by the
7030 GetVersionEx() function. Stop duplicating the latest Windows
7031 version in get_uname(). Fixes bug 28096; bugfix on 0.2.2.34;
7032 reported by Keifer Bly.
7035 - Increase logging and tag all log entries with timestamps in
7036 test_rebind.py. Provides diagnostics for issue 28229.
7038 o Code simplification and refactoring (shared random, dirauth):
7039 - Change many tor_assert() to use BUG() instead. The idea is to not
7040 crash a dirauth but rather scream loudly with a stacktrace and let
7041 it continue run. The shared random subsystem is very resilient and
7042 if anything wrong happens with it, at worst a non coherent value
7043 will be put in the vote and discarded by the other authorities.
7044 Closes ticket 19566.
7046 o Documentation (onion services):
7047 - Document in the man page that changing ClientOnionAuthDir value or
7048 adding a new file in the directory will not work at runtime upon
7049 sending a HUP if Sandbox 1. Closes ticket 28128.
7050 - Note in the man page that the only real way to fully revoke an
7051 onion service v3 client authorization is by restarting the tor
7052 process. Closes ticket 28275.
7055 Changes in version 0.3.5.5-alpha - 2018-11-16
7056 Tor 0.3.5.5-alpha includes numerous bugfixes on earlier releases,
7057 including several that we hope to backport to older release series in
7060 o Major bugfixes (OpenSSL, portability):
7061 - Fix our usage of named groups when running as a TLS 1.3 client in
7062 OpenSSL 1.1.1. Previously, we only initialized EC groups when
7063 running as a relay, which caused clients to fail to negotiate TLS
7064 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
7067 o Minor features (geoip):
7068 - Update geoip and geoip6 to the November 6 2018 Maxmind GeoLite2
7069 Country database. Closes ticket 28395.
7071 o Minor bugfixes (compilation):
7072 - Initialize a variable unconditionally in aes_new_cipher(), since
7073 some compilers cannot tell that we always initialize it before
7074 use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
7076 o Minor bugfixes (connection, relay):
7077 - Avoid a logging a BUG() stacktrace when closing connection held
7078 open because the write side is rate limited but not the read side.
7079 Now, the connection read side is simply shut down until Tor is
7080 able to flush the connection and close it. Fixes bug 27750; bugfix
7083 o Minor bugfixes (continuous integration, Windows):
7084 - Manually configure the zstd compiler options, when building using
7085 mingw on Appveyor Windows CI. The MSYS2 mingw zstd package does
7086 not come with a pkg-config file. Fixes bug 28454; bugfix
7088 - Stop using an external OpenSSL install, and stop installing MSYS2
7089 packages, when building using mingw on Appveyor Windows CI. Fixes
7090 bug 28399; bugfix on 0.3.4.1-alpha.
7092 o Minor bugfixes (documentation):
7093 - Make Doxygen work again after the code movement in the 0.3.5
7094 source tree. Fixes bug 28435; bugfix on 0.3.5.1-alpha.
7096 o Minor bugfixes (Linux seccomp2 sandbox):
7097 - Permit the "shutdown()" system call, which is apparently used by
7098 OpenSSL under some circumstances. Fixes bug 28183; bugfix
7101 o Minor bugfixes (logging):
7102 - Stop talking about the Named flag in log messages. Clients have
7103 ignored the Named flag since 0.3.2. Fixes bug 28441; bugfix
7106 o Minor bugfixes (memory leaks):
7107 - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
7108 bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
7110 o Minor bugfixes (onion services):
7111 - On an intro point for a version 3 onion service, stop closing
7112 introduction circuits on an NACK. This lets the client decide
7113 whether to reuse the circuit or discard it. Previously, we closed
7114 intro circuits when sending NACKs. Fixes bug 27841; bugfix on
7115 0.3.2.1-alpha. Patch by Neel Chaunan.
7116 - When replacing a descriptor in the client cache, make sure to
7117 close all client introduction circuits for the old descriptor, so
7118 we don't end up with unusable leftover circuits. Fixes bug 27471;
7119 bugfix on 0.3.2.1-alpha.
7122 Changes in version 0.3.5.4-alpha - 2018-11-08
7123 Tor 0.3.5.4-alpha includes numerous bugfixes on earlier versions and
7124 improves our continuous integration support. It continues our attempts
7125 to stabilize this alpha branch and build it into a foundation for an
7126 acceptable long-term-support release.
7128 o Major bugfixes (compilation, rust):
7129 - Rust tests can now build and run successfully with the
7130 --enable-fragile-hardening option enabled. Doing this currently
7131 requires the rust beta channel; it will be possible with stable
7132 rust once Rust version 1.31 is released. Patch from Alex Crichton.
7133 Fixes bugs 27272, 27273, and 27274. Bugfix on 0.3.1.1-alpha.
7135 o Major bugfixes (embedding, main loop):
7136 - When DisableNetwork becomes set, actually disable periodic events
7137 that are already enabled. (Previously, we would refrain from
7138 enabling new ones, but we would leave the old ones turned on.)
7139 Fixes bug 28348; bugfix on 0.3.4.1-alpha.
7141 o Minor features (continuous integration):
7142 - Add a Travis CI build for --enable-nss on Linux gcc. Closes
7144 - Add new CI job to Travis configuration to run stem-based
7145 integration tests. Closes ticket 27913.
7147 o Minor features (Windows, continuous integration):
7148 - Build tor on Windows Server 2012 R2 and Windows Server 2016 using
7149 Appveyor's CI. Closes ticket 28318.
7151 o Minor bugfixes (C correctness, also in 0.3.4.9):
7152 - Avoid undefined behavior in an end-of-string check when parsing
7153 the BEGIN line in a directory object. Fixes bug 28202; bugfix
7156 o Minor bugfixes (compilation):
7157 - Fix a pair of missing headers on OpenBSD. Fixes bug 28303; bugfix
7158 on 0.3.5.1-alpha. Patch from Kris Katterjohn.
7160 o Minor bugfixes (compilation, OpenSolaris):
7161 - Fix compilation on OpenSolaris and its descendants by adding a
7162 missing include to compat_pthreads.c. Fixes bug 27963; bugfix
7165 o Minor bugfixes (configuration):
7166 - Refuse to start with relative file paths and RunAsDaemon set
7167 (regression from the fix for bug 22731). Fixes bug 28298; bugfix
7170 o Minor bugfixes (directory authority, also in 0.3.4.9):
7171 - Log additional info when we get a relay that shares an ed25519 ID
7172 with a different relay, instead of a BUG() warning with a
7173 backtrace. Fixes bug 27800; bugfix on 0.3.2.1-alpha.
7175 o Minor bugfixes (onion service v3):
7176 - Build the service descriptor's signing key certificate before
7177 uploading, so we always have a fresh one: leaving no chances for
7178 it to expire service side. Fixes bug 27838; bugfix
7181 o Minor bugfixes (onion service v3, client authorization):
7182 - Fix an assert() when adding a client authorization for the first
7183 time and then sending a HUP signal to the service. Before that,
7184 Tor would stop abruptly. Fixes bug 27995; bugfix on 0.3.5.1-alpha.
7186 o Minor bugfixes (onion services):
7187 - Unless we have explicitly set HiddenServiceVersion, detect the
7188 onion service version and then look for invalid options.
7189 Previously, we did the reverse, but that broke existing configs
7190 which were pointed to a v2 service and had options like
7191 HiddenServiceAuthorizeClient set. Fixes bug 28127; bugfix on
7192 0.3.5.1-alpha. Patch by Neel Chauhan.
7194 o Minor bugfixes (portability):
7195 - Make the OPE code (which is used for v3 onion services) run
7196 correctly on big-endian platforms. Fixes bug 28115; bugfix
7199 o Minor bugfixes (protover, rust):
7200 - Reject extra commas in version strings. Fixes bug 27197; bugfix
7203 o Minor bugfixes (relay shutdown, systemd):
7204 - Notify systemd of ShutdownWaitLength so it can be set to longer
7205 than systemd's TimeoutStopSec. In Tor's systemd service file, set
7206 TimeoutSec to 60 seconds to allow Tor some time to shut down.
7207 Fixes bug 28113; bugfix on 0.2.6.2-alpha.
7209 o Minor bugfixes (rust, also in 0.3.4.9):
7210 - Fix a potential null dereference in protover_all_supported(). Add
7211 a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
7212 - Return a string that can be safely freed by C code, not one
7213 created by the rust allocator, in protover_all_supported(). Fixes
7214 bug 27740; bugfix on 0.3.3.1-alpha.
7216 o Minor bugfixes (rust, directory authority, also in 0.3.4.9):
7217 - Fix an API mismatch in the rust implementation of
7218 protover_compute_vote(). This bug could have caused crashes on any
7219 directory authorities running Tor with Rust (which we do not yet
7220 recommend). Fixes bug 27741; bugfix on 0.3.3.6.
7222 o Minor bugfixes (testing):
7223 - Avoid hangs and race conditions in test_rebind.py. Fixes bug
7224 27968; bugfix on 0.3.5.1-alpha.
7226 o Minor bugfixes (testing, also in 0.3.4.9):
7227 - Treat backtrace test failures as expected on BSD-derived systems
7228 (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
7229 (FreeBSD failures have been treated as expected since 18204 in
7230 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
7232 o Documentation (onion service manpage):
7233 - Improve HSv3 client authorization by making some options more
7234 explicit and detailed. Closes ticket 28026. Patch by Mike Tigas.
7237 Changes in version 0.3.4.9 - 2018-11-02
7238 Tor 0.3.4.9 is the second stable release in its series; it backports
7239 numerous fixes, including a fix for a bandwidth management bug that
7240 was causing memory exhaustion on relays. Anyone running an earlier
7241 version of Tor 0.3.4.9 should upgrade.
7243 o Major bugfixes (compilation, backport from 0.3.5.3-alpha):
7244 - Fix compilation on ARM (and other less-used CPUs) when compiling
7245 with OpenSSL before 1.1. Fixes bug 27781; bugfix on 0.3.4.1-alpha.
7247 o Major bugfixes (mainloop, bootstrap, backport from 0.3.5.3-alpha):
7248 - Make sure Tor bootstraps and works properly if only the
7249 ControlPort is set. Prior to this fix, Tor would only bootstrap
7250 when a client port was set (Socks, Trans, NATD, DNS or HTTPTunnel
7251 port). Fixes bug 27849; bugfix on 0.3.4.1-alpha.
7253 o Major bugfixes (relay, backport from 0.3.5.3-alpha):
7254 - When our write bandwidth limit is exhausted, stop writing on the
7255 connection. Previously, we had a typo in the code that would make
7256 us stop reading instead, leading to relay connections being stuck
7257 indefinitely and consuming kernel RAM. Fixes bug 28089; bugfix
7260 o Major bugfixes (restart-in-process, backport from 0.3.5.1-alpha):
7261 - Fix a use-after-free error that could be caused by passing Tor an
7262 impossible set of options that would fail during options_act().
7263 Fixes bug 27708; bugfix on 0.3.3.1-alpha.
7265 o Minor features (continuous integration, backport from 0.3.5.1-alpha):
7266 - Don't do a distcheck with --disable-module-dirauth in Travis.
7267 Implements ticket 27252.
7268 - Only run one online rust build in Travis, to reduce network
7269 errors. Skip offline rust builds on Travis for Linux gcc, because
7270 they're redundant. Implements ticket 27252.
7271 - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
7272 duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
7273 Linux with default settings, because all the non-default builds
7274 use gcc on Linux. Implements ticket 27252.
7276 o Minor features (continuous integration, backport from 0.3.5.3-alpha):
7277 - Use the Travis Homebrew addon to install packages on macOS during
7278 Travis CI. The package list is the same, but the Homebrew addon
7279 does not do a `brew update` by default. Implements ticket 27738.
7281 o Minor features (geoip):
7282 - Update geoip and geoip6 to the October 9 2018 Maxmind GeoLite2
7283 Country database. Closes ticket 27991.
7285 o Minor bugfixes (32-bit OSX and iOS, timing, backport from 0.3.5.2-alpha):
7286 - Fix an integer overflow bug in our optimized 32-bit millisecond-
7287 difference algorithm for 32-bit Apple platforms. Previously, it
7288 would overflow when calculating the difference between two times
7289 more than 47 days apart. Fixes part of bug 27139; bugfix
7291 - Improve the precision of our 32-bit millisecond difference
7292 algorithm for 32-bit Apple platforms. Fixes part of bug 27139;
7293 bugfix on 0.3.4.1-alpha.
7294 - Relax the tolerance on the mainloop/update_time_jumps test when
7295 running on 32-bit Apple platforms. Fixes part of bug 27139; bugfix
7298 o Minor bugfixes (C correctness, to appear in 0.3.5.4-alpha):
7299 - Avoid undefined behavior in an end-of-string check when parsing
7300 the BEGIN line in a directory object. Fixes bug 28202; bugfix
7303 o Minor bugfixes (CI, appveyor, to appear in 0.3.5.4-alpha):
7304 - Only install the necessary mingw packages during our appveyor
7305 builds. This change makes the build a little faster, and prevents
7306 a conflict with a preinstalled mingw openssl that appveyor now
7307 ships. Fixes bugs 27943 and 27765; bugfix on 0.3.4.2-alpha.
7309 o Minor bugfixes (code safety, backport from 0.3.5.3-alpha):
7310 - Rewrite our assertion macros so that they no longer suppress the
7311 compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
7313 o Minor bugfixes (continuous integration, backport from 0.3.5.1-alpha):
7314 - Stop reinstalling identical packages in our Windows CI. Fixes bug
7315 27464; bugfix on 0.3.4.1-alpha.
7317 o Minor bugfixes (directory authority, to appear in 0.3.5.4-alpha):
7318 - Log additional info when we get a relay that shares an ed25519 ID
7319 with a different relay, instead making a BUG() warning. Fixes bug
7320 27800; bugfix on 0.3.2.1-alpha.
7322 o Minor bugfixes (directory connection shutdown, backport from 0.3.5.1-alpha):
7323 - Avoid a double-close when shutting down a stalled directory
7324 connection. Fixes bug 26896; bugfix on 0.3.4.1-alpha.
7326 o Minor bugfixes (HTTP tunnel, backport from 0.3.5.1-alpha):
7327 - Fix a bug warning when closing an HTTP tunnel connection due to an
7328 HTTP request we couldn't handle. Fixes bug 26470; bugfix
7331 o Minor bugfixes (netflow padding, backport from 0.3.5.1-alpha):
7332 - Ensure circuitmux queues are empty before scheduling or sending
7333 padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
7335 o Minor bugfixes (onion service v3, backport from 0.3.5.1-alpha):
7336 - When the onion service directory can't be created or has the wrong
7337 permissions, do not log a stack trace. Fixes bug 27335; bugfix
7340 o Minor bugfixes (onion service v3, backport from 0.3.5.2-alpha):
7341 - Close all SOCKS request (for the same .onion) if the newly fetched
7342 descriptor is unusable. Before that, we would close only the first
7343 one leaving the other hanging and let to time out by themselves.
7344 Fixes bug 27410; bugfix on 0.3.2.1-alpha.
7346 o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
7347 - When selecting a v3 rendezvous point, don't only look at the
7348 protover, but also check whether the curve25519 onion key is
7349 present. This way we avoid picking a relay that supports the v3
7350 rendezvous but for which we don't have the microdescriptor. Fixes
7351 bug 27797; bugfix on 0.3.2.1-alpha.
7353 o Minor bugfixes (protover, backport from 0.3.5.3-alpha):
7354 - Reject protocol names containing bytes other than alphanumeric
7355 characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
7358 o Minor bugfixes (rust, backport from 0.3.5.1-alpha):
7359 - Compute protover votes correctly in the rust version of the
7360 protover code. Previously, the protover rewrite in 24031 allowed
7361 repeated votes from the same voter for the same protocol version
7362 to be counted multiple times in protover_compute_vote(). Fixes bug
7363 27649; bugfix on 0.3.3.5-rc.
7364 - Reject protover names that contain invalid characters. Fixes bug
7365 27687; bugfix on 0.3.3.1-alpha.
7367 o Minor bugfixes (rust, backport from 0.3.5.2-alpha):
7368 - protover_all_supported() would attempt to allocate up to 16GB on
7369 some inputs, leading to a potential memory DoS. Fixes bug 27206;
7370 bugfix on 0.3.3.5-rc.
7372 o Minor bugfixes (rust, directory authority, to appear in 0.3.5.4-alpha):
7373 - Fix an API mismatch in the rust implementation of
7374 protover_compute_vote(). This bug could have caused crashes on any
7375 directory authorities running Tor with Rust (which we do not yet
7376 recommend). Fixes bug 27741; bugfix on 0.3.3.6.
7378 o Minor bugfixes (rust, to appear in 0.3.5.4-alpha):
7379 - Fix a potential null dereference in protover_all_supported(). Add
7380 a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
7381 - Return a string that can be safely freed by C code, not one
7382 created by the rust allocator, in protover_all_supported(). Fixes
7383 bug 27740; bugfix on 0.3.3.1-alpha.
7385 o Minor bugfixes (testing, backport from 0.3.5.1-alpha):
7386 - If a unit test running in a subprocess exits abnormally or with a
7387 nonzero status code, treat the test as having failed, even if the
7388 test reported success. Without this fix, memory leaks don't cause
7389 the tests to fail, even with LeakSanitizer. Fixes bug 27658;
7390 bugfix on 0.2.2.4-alpha.
7392 o Minor bugfixes (testing, backport from 0.3.5.3-alpha):
7393 - Make the hs_service tests use the same time source when creating
7394 the introduction point and when testing it. Now tests work better
7395 on very slow systems like ARM or Travis. Fixes bug 27810; bugfix
7398 o Minor bugfixes (testing, to appear in 0.3.5.4-alpha):
7399 - Treat backtrace test failures as expected on BSD-derived systems
7400 (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
7401 (FreeBSD failures have been treated as expected since 18204 in
7402 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
7405 Changes in version 0.3.5.3-alpha - 2018-10-17
7406 Tor 0.3.5.3-alpha fixes several bugs, mostly from previous 0.3.5.x
7407 versions. One important fix for relays addresses a problem with rate-
7408 limiting code from back in 0.3.4.x: If the fix works out, we'll be
7409 backporting it soon. This release is still an alpha, but we hope it's
7410 getting closer and closer to stability.
7412 o Major features (onion services):
7413 - Version 3 onion services can now use the per-service
7414 HiddenServiceExportCircuitID option to differentiate client
7415 circuits. It communicates with the service by using the HAProxy
7416 protocol to assign virtual IP addresses to inbound client
7417 circuits. Closes ticket 4700. Patch by Mahrud Sayrafi.
7419 o Major bugfixes (compilation):
7420 - Fix compilation on ARM (and other less-used CPUs) when compiling
7421 with OpenSSL before 1.1. Fixes bug 27781; bugfix on 0.3.4.1-alpha.
7423 o Major bugfixes (initialization, crash):
7424 - Fix an assertion crash that would stop Tor from starting up if it
7425 tried to activate a periodic event too early. Fixes bug 27861;
7426 bugfix on 0.3.5.1-alpha.
7428 o Major bugfixes (mainloop, bootstrap):
7429 - Make sure Tor bootstraps and works properly if only the
7430 ControlPort is set. Prior to this fix, Tor would only bootstrap
7431 when a client port was set (Socks, Trans, NATD, DNS or HTTPTunnel
7432 port). Fixes bug 27849; bugfix on 0.3.4.1-alpha.
7434 o Major bugfixes (relay):
7435 - When our write bandwidth limit is exhausted, stop writing on the
7436 connection. Previously, we had a typo in the code that would make
7437 us stop reading instead, leading to relay connections being stuck
7438 indefinitely and consuming kernel RAM. Fixes bug 28089; bugfix
7441 o Minor features (continuous integration):
7442 - Use the Travis Homebrew addon to install packages on macOS during
7443 Travis CI. The package list is the same, but the Homebrew addon
7444 does not do a `brew update` by default. Implements ticket 27738.
7445 - Report what program produced the mysterious core file that we
7446 occasionally see on Travis CI during make distcheck. Closes
7449 o Minor features (geoip):
7450 - Update geoip and geoip6 to the October 9 2018 Maxmind GeoLite2
7451 Country database. Closes ticket 27991.
7453 o Minor bugfixes (code safety):
7454 - Rewrite our assertion macros so that they no longer suppress the
7455 compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
7458 o Minor bugfixes (compilation):
7459 - Compile the ed25519-donna code with a correct declaration of
7460 crypto_strongest_rand(). Previously, we built it with one type,
7461 but linked it against another in the unit tests, which caused
7462 compilation failures with LTO enabled. This could have caused
7463 other undefined behavior in the tests. Fixes bug 27728; bugfix
7466 o Minor bugfixes (compilation, netbsd):
7467 - Add a missing include back into procmon.c. Fixes bug 27990; bugfix
7470 o Minor bugfixes (continuous integration, appveyor):
7471 - Install only the necessary mingw packages during our appveyor
7472 builds. This change makes the build a little faster, and prevents
7473 a conflict with a preinstalled mingw openssl that appveyor now
7474 ships. Fixes bugs 27765 and 27943; bugfix on 0.3.4.2-alpha.
7476 o Minor bugfixes (directory permissions):
7477 - When a user requests a group-readable DataDirectory, give it to
7478 them. Previously, when the DataDirectory and the CacheDirectory
7479 were the same, the default setting (0) for
7480 CacheDirectoryGroupReadable would override the setting for
7481 DataDirectoryGroupReadable. Fixes bug 26913; bugfix
7484 o Minor bugfixes (memory leaks):
7485 - Fix a small memory leak when calling Tor with --dump-config. Fixes
7486 bug 27893; bugfix on 0.3.2.1-alpha.
7488 o Minor bugfixes (networking):
7489 - In retry_listeners_ports(), make sure that we're removing a member
7490 of old_conns smartlist at most once. Fixes bug 27808; bugfix
7492 - Refrain from attempting socket rebinding when old and new
7493 listeners are in different address families. Fixes bug 27928;
7494 bugfix on 0.3.5.1-alpha.
7496 o Minor bugfixes (onion service v3):
7497 - Stop dumping a stack trace when trying to connect to an intro
7498 point without having a descriptor for it. Fixes bug 27774; bugfix
7500 - Don't warn so loudly when Tor is unable to decode an onion
7501 descriptor. This can now happen as a normal use case if a client
7502 gets a descriptor with client authorization but the client is not
7503 authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
7504 - When selecting a v3 rendezvous point, don't only look at the
7505 protover, but also check whether the curve25519 onion key is
7506 present. This way we avoid picking a relay that supports the v3
7507 rendezvous but for which we don't have the microdescriptor. Fixes
7508 bug 27797; bugfix on 0.3.2.1-alpha.
7510 o Minor bugfixes (protover):
7511 - Reject protocol names containing bytes other than alphanumeric
7512 characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
7515 o Minor bugfixes (testing):
7516 - Make the hs_service tests use the same time source when creating
7517 the introduction point and when testing it. Now tests work better
7518 on very slow systems like ARM or Travis. Fixes bug 27810; bugfix
7520 - In test_rebind.py, check if the Python version is in the supported
7521 range. Fixes bug 27675; bugfix on 0.3.5.1-alpha.
7523 o Code simplification and refactoring:
7524 - Divide more large Tor source files -- especially ones that span
7525 multiple areas of functionality -- into smaller parts, including
7526 onion.c and main.c. Closes ticket 26747.
7527 - Divide the "routerparse.c" module into separate modules for each
7528 group of parsed objects. Closes ticket 27924.
7529 - Move protover_rust.c to the same place protover.c was moved to.
7530 Closes ticket 27814.
7531 - Split directory.c into separate pieces for client, server, and
7532 common functionality. Closes ticket 26744.
7533 - Split the non-statistics-related parts from the rephist.c and
7534 geoip.c modules. Closes ticket 27892.
7535 - Split the router.c file into relay-only and shared components, to
7536 help with future modularization. Closes ticket 27864.
7539 - In the tor-resolve(1) manpage, fix the reference to socks-
7540 extensions.txt by adding a web URL. Resolves ticket 27853.
7541 - Mention that we require Python to be 2.7 or newer for some
7542 integration tests that we ship with Tor. Resolves ticket 27677.
7545 Changes in version 0.3.5.2-alpha - 2018-09-21
7546 Tor 0.3.5.2-alpha fixes several bugs in 0.3.5.1-alpha, including one
7547 that made Tor think it had run out of sockets. Anybody running a relay
7548 or an onion service on 0.3.5.1-alpha should upgrade.
7550 o Major bugfixes (relay bandwidth statistics):
7551 - When we close relayed circuits, report the data in the circuit
7552 queues as being written in our relay bandwidth stats. This
7553 mitigates guard discovery and other attacks that close circuits
7554 for the explicit purpose of noticing this discrepancy in
7555 statistics. Fixes bug 23512; bugfix on 0.0.8pre3.
7557 o Major bugfixes (socket accounting):
7558 - In our socket accounting code, count a socket as closed even when
7559 it is closed indirectly by the TLS layer. Previously, we would
7560 count these sockets as still in use, and incorrectly believe that
7561 we had run out of sockets. Fixes bug 27795; bugfix
7564 o Minor bugfixes (32-bit OSX and iOS, timing):
7565 - Fix an integer overflow bug in our optimized 32-bit millisecond-
7566 difference algorithm for 32-bit Apple platforms. Previously, it
7567 would overflow when calculating the difference between two times
7568 more than 47 days apart. Fixes part of bug 27139; bugfix
7570 - Improve the precision of our 32-bit millisecond difference
7571 algorithm for 32-bit Apple platforms. Fixes part of bug 27139;
7572 bugfix on 0.3.4.1-alpha.
7573 - Relax the tolerance on the mainloop/update_time_jumps test when
7574 running on 32-bit Apple platforms. Fixes part of bug 27139; bugfix
7577 o Minor bugfixes (onion service v3):
7578 - Close all SOCKS request (for the same .onion) if the newly fetched
7579 descriptor is unusable. Before that, we would close only the first
7580 one leaving the other hanging and let to time out by themselves.
7581 Fixes bug 27410; bugfix on 0.3.2.1-alpha.
7583 o Minor bugfixes (memory leak):
7584 - Fix an unlikely memory leak when trying to read a private key from
7585 a ridiculously large file. Fixes bug 27764; bugfix on
7586 0.3.5.1-alpha. This is CID 1439488.
7588 o Minor bugfixes (NSS):
7589 - Correctly detect failure to open a dummy TCP socket when stealing
7590 ownership of an fd from the NSS layer. Fixes bug 27782; bugfix
7593 o Minor bugfixes (rust):
7594 - protover_all_supported() would attempt to allocate up to 16GB on
7595 some inputs, leading to a potential memory DoS. Fixes bug 27206;
7596 bugfix on 0.3.3.5-rc.
7598 o Minor bugfixes (testing):
7599 - Revise the "conditionvar_timeout" test so that it succeeds even on
7600 heavily loaded systems where the test threads are not scheduled
7601 within 200 msec. Fixes bug 27073; bugfix on 0.2.6.3-alpha.
7603 o Code simplification and refactoring:
7604 - Divide the routerlist.c and dirserv.c modules into smaller parts.
7605 Closes ticket 27799.
7608 Changes in version 0.3.5.1-alpha - 2018-09-18
7609 Tor 0.3.5.1-alpha is the first release of the 0.3.5.x series. It adds
7610 client authorization for modern (v3) onion services, improves
7611 bootstrap reporting, begins reorganizing Tor's codebase, adds optional
7612 support for NSS in place of OpenSSL, and much more.
7614 o Major features (onion services, UI change):
7615 - For a newly created onion service, the default version is now 3.
7616 Tor still supports existing version 2 services, but the operator
7617 now needs to set "HiddenServiceVersion 2" in order to create a new
7618 version 2 service. For existing services, Tor now learns the
7619 version by reading the key file. Closes ticket 27215.
7621 o Major features (relay, UI change):
7622 - Relays no longer run as exits by default. If the "ExitRelay"
7623 option is auto (or unset), and no exit policy is specified with
7624 ExitPolicy or ReducedExitPolicy, we now treat ExitRelay as 0.
7625 Previously in this case, we allowed exit traffic and logged a
7626 warning message. Closes ticket 21530. Patch by Neel Chauhan.
7627 - Tor now validates that the ContactInfo config option is valid UTF-
7628 8 when parsing torrc. Closes ticket 27428.
7630 o Major features (bootstrap):
7631 - Don't report directory progress until after a connection to a
7632 relay or bridge has succeeded. Previously, we'd report 80%
7633 progress based on cached directory information when we couldn't
7634 even connect to the network. Closes ticket 27169.
7636 o Major features (new code layout):
7637 - Nearly all of Tor's source code has been moved around into more
7638 logical places. The "common" directory is now divided into a set
7639 of libraries in "lib", and files in the "or" directory have been
7640 split into "core" (logic absolutely needed for onion routing),
7641 "feature" (independent modules in Tor), and "app" (to configure
7642 and invoke the rest of Tor). See doc/HACKING/CodeStructure.md for
7643 more information. Closes ticket 26481.
7645 This refactoring is not complete: although the libraries have been
7646 refactored to be acyclic, the main body of Tor is still too
7647 interconnected. We will attempt to improve this in the future.
7649 o Major features (onion services v3):
7650 - Implement onion service client authorization at the descriptor
7651 level: only authorized clients can decrypt a service's descriptor
7652 to find out how to contact it. A new torrc option was added to
7653 control this client side: ClientOnionAuthDir <path>. On the
7654 service side, if the "authorized_clients/" directory exists in the
7655 onion service directory path, client configurations are read from
7656 the files within. See the manpage for more details. Closes ticket
7657 27547. Patch done by Suphanat Chunhapanya (haxxpop).
7658 - Improve revision counter generation in next-gen onion services.
7659 Onion services can now scale by hosting multiple instances on
7660 different hosts without synchronization between them, which was
7661 previously impossible because descriptors would get rejected by
7662 HSDirs. Addresses ticket 25552.
7664 o Major features (portability, cryptography, experimental, TLS):
7665 - Tor now has the option to compile with the NSS library instead of
7666 OpenSSL. This feature is experimental, and we expect that bugs may
7667 remain. It is mainly intended for environments where Tor's
7668 performance is not CPU-bound, and where NSS is already known to be
7669 installed. To try it out, configure Tor with the --enable-nss
7670 flag. Closes tickets 26631, 26815, and 26816.
7672 If you are experimenting with this option and using an old cached
7673 consensus, Tor may fail to start. To solve this, delete your
7674 "cached-consensus" and "cached-microdesc-consensus" files,
7675 (if present), and restart Tor.
7677 o Major bugfixes (directory authority):
7678 - Actually check that the address we get from DirAuthority
7679 configuration line is valid IPv4. Explicitly disallow DirAuthority
7680 address to be a DNS hostname. Fixes bug 26488; bugfix
7683 o Major bugfixes (restart-in-process):
7684 - Fix a use-after-free error that could be caused by passing Tor an
7685 impossible set of options that would fail during options_act().
7686 Fixes bug 27708; bugfix on 0.3.3.1-alpha.
7688 o Minor features (admin tools):
7689 - Add a new --key-expiration option to print the expiration date of
7690 the signing cert in an ed25519_signing_cert file. Resolves
7693 o Minor features (build):
7694 - If you pass the "--enable-pic" option to configure, Tor will try
7695 to tell the compiler to build position-independent code suitable
7696 to link into a dynamic library. (The default remains -fPIE, for
7697 code suitable for a relocatable executable.) Closes ticket 23846.
7699 o Minor features (code correctness, testing):
7700 - Tor's build process now includes a "check-includes" make target to
7701 verify that no module of Tor relies on any headers from a higher-
7702 level module. We hope to use this feature over time to help
7703 refactor our codebase. Closes ticket 26447.
7705 o Minor features (code layout):
7706 - We have a new "lowest-level" error-handling API for use by code
7707 invoked from within the logging module. With this interface, the
7708 logging code is no longer at risk of calling into itself if a
7709 failure occurs while it is trying to log something. Closes
7712 o Minor features (compilation):
7713 - Tor's configure script now supports a --with-malloc= option to
7714 select your malloc implementation. Supported options are
7715 "tcmalloc", "jemalloc", "openbsd" (deprecated), and "system" (the
7716 default). Addresses part of ticket 20424. Based on a patch from
7719 o Minor features (config):
7720 - The "auto" keyword in torrc is now case-insensitive. Closes
7723 o Minor features (continuous integration):
7724 - Don't do a distcheck with --disable-module-dirauth in Travis.
7725 Implements ticket 27252.
7726 - Install libcap-dev and libseccomp2-dev so these optional
7727 dependencies get tested on Travis CI. Closes ticket 26560.
7728 - Only run one online rust build in Travis, to reduce network
7729 errors. Skip offline rust builds on Travis for Linux gcc, because
7730 they're redundant. Implements ticket 27252.
7731 - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
7732 duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
7733 Linux with default settings, because all the non-default builds
7734 use gcc on Linux. Implements ticket 27252.
7736 o Minor features (controller):
7737 - Emit CIRC_BW events as soon as we detect that we processed an
7738 invalid or otherwise dropped cell on a circuit. This allows
7739 vanguards and other controllers to react more quickly to dropped
7740 cells. Closes ticket 27678.
7741 - For purposes of CIRC_BW-based dropped cell detection, track half-
7742 closed stream ids, and allow their ENDs, SENDMEs, DATA and path
7743 bias check cells to arrive without counting it as dropped until
7744 either the END arrives, or the windows are empty. Closes
7746 - Implement a 'GETINFO md/all' controller command to enable getting
7747 all known microdescriptors. Closes ticket 8323.
7748 - The GETINFO command now support an "uptime" argument, to return
7749 Tor's uptime in seconds. Closes ticket 25132.
7751 o Minor features (denial-of-service avoidance):
7752 - Make our OOM handler aware of the DNS cache so that it doesn't
7753 fill up the memory. This check is important for our DoS mitigation
7754 subsystem. Closes ticket 18642. Patch by Neel Chauhan.
7756 o Minor features (development):
7757 - Tor's makefile now supports running the "clippy" Rust style tool
7758 on our Rust code. Closes ticket 22156.
7760 o Minor features (directory authority):
7761 - There is no longer an artificial upper limit on the length of
7762 bandwidth lines. Closes ticket 26223.
7763 - When a bandwidth file is used to obtain the bandwidth measurements,
7764 include this bandwidth file headers in the votes. Closes
7766 - Improved support for networks with only a single authority or a
7767 single fallback directory. Patch from Gabriel Somlo. Closes
7770 o Minor features (embedding API):
7771 - The Tor controller API now supports a function to launch Tor with
7772 a preconstructed owning controller FD, so that embedding
7773 applications don't need to manage controller ports and
7774 authentication. Closes ticket 24204.
7775 - The Tor controller API now has a function that returns the name
7776 and version of the backend implementing the API. Closes
7779 o Minor features (geoip):
7780 - Update geoip and geoip6 to the September 6 2018 Maxmind GeoLite2
7781 Country database. Closes ticket 27631.
7783 o Minor features (memory management):
7784 - Get Libevent to use the same memory allocator as Tor, by calling
7785 event_set_mem_functions() during initialization. Resolves
7788 o Minor features (memory usage):
7789 - When not using them, store legacy TAP public onion keys in DER-
7790 encoded format, rather than as expanded public keys. This should
7791 save several megabytes on typical clients. Closes ticket 27246.
7793 o Minor features (OpenSSL):
7794 - When possible, use RFC5869 HKDF implementation from OpenSSL rather
7795 than our own. Resolves ticket 19979.
7797 o Minor features (Rust, code quality):
7798 - Improve rust code quality in the rust protover implementation by
7799 making it more idiomatic. Includes changing an internal API to
7800 take &str instead of &String. Closes ticket 26492.
7802 o Minor features (testing):
7803 - Add scripts/test/chutney-git-bisect.sh, for bisecting using
7804 chutney. Implements ticket 27211.
7806 o Minor features (tor-resolve):
7807 - The tor-resolve utility can now be used with IPv6 SOCKS proxies.
7808 Side-effect of the refactoring for ticket 26526.
7810 o Minor features (UI):
7811 - Log each included configuration file or directory as we read it,
7812 to provide more visibility about where Tor is reading from. Patch
7813 from Unto Sten; closes ticket 27186.
7814 - Lower log level of "Scheduler type KIST has been enabled" to INFO.
7815 Closes ticket 26703.
7817 o Minor bugfixes (bootstrap):
7818 - Try harder to get descriptors in non-exit test networks, by using
7819 the mid weight for the third hop when there are no exits. Fixes
7820 bug 27237; bugfix on 0.2.6.2-alpha.
7822 o Minor bugfixes (C correctness):
7823 - Avoid casting smartlist index to int implicitly, as it may trigger
7824 a warning (-Wshorten-64-to-32). Fixes bug 26282; bugfix on
7825 0.2.3.13-alpha, 0.2.7.1-alpha and 0.2.1.1-alpha.
7826 - Use time_t for all values in
7827 predicted_ports_prediction_time_remaining(). Rework the code that
7828 computes difference between durations/timestamps. Fixes bug 27165;
7829 bugfix on 0.3.1.1-alpha.
7831 o Minor bugfixes (client, memory usage):
7832 - When not running as a directory cache, there is no need to store
7833 the text of the current consensus networkstatus in RAM.
7834 Previously, however, clients would store it anyway, at a cost of
7835 over 5 MB. Now, they do not. Fixes bug 27247; bugfix
7838 o Minor bugfixes (client, reachableaddresses):
7839 - Instead of adding a "reject *:*" line to ReachableAddresses when
7840 loading the configuration, add one to the policy after parsing it
7841 in parse_reachable_addresses(). This prevents extra "reject *.*"
7842 lines from accumulating on reloads. Fixes bug 20874; bugfix on
7843 0.1.1.5-alpha. Patch by Neel Chauhan.
7845 o Minor bugfixes (code quality):
7846 - Rename sandbox_getaddrinfo() and other functions to no longer
7847 misleadingly suggest that they are sandbox-only. Fixes bug 26525;
7848 bugfix on 0.2.7.1-alpha.
7850 o Minor bugfixes (configuration, Onion Services):
7851 - In rend_service_parse_port_config(), disallow any input to remain
7852 after address-port pair was parsed. This will catch address and
7853 port being whitespace-separated by mistake of the user. Fixes bug
7854 27044; bugfix on 0.2.9.10.
7856 o Minor bugfixes (continuous integration):
7857 - Stop reinstalling identical packages in our Windows CI. Fixes bug
7858 27464; bugfix on 0.3.4.1-alpha.
7860 o Minor bugfixes (controller):
7861 - Consider all routerinfo errors other than "not a server" to be
7862 transient for the purpose of "GETINFO exit-policy/*" controller
7863 request. Print stacktrace in the unlikely case of failing to
7864 recompute routerinfo digest. Fixes bug 27034; bugfix
7867 o Minor bugfixes (directory connection shutdown):
7868 - Avoid a double-close when shutting down a stalled directory
7869 connection. Fixes bug 26896; bugfix on 0.3.4.1-alpha.
7871 o Minor bugfixes (HTTP tunnel):
7872 - Fix a bug warning when closing an HTTP tunnel connection due to an
7873 HTTP request we couldn't handle. Fixes bug 26470; bugfix
7876 o Minor bugfixes (ipv6):
7877 - In addrs_in_same_network_family(), we choose the subnet size based
7878 on the IP version (IPv4 or IPv6). Previously, we chose a fixed
7879 subnet size of /16 for both IPv4 and IPv6 addresses. Fixes bug
7880 15518; bugfix on 0.2.3.1-alpha. Patch by Neel Chauhan.
7882 o Minor bugfixes (logging):
7883 - As a precaution, do an early return from log_addr_has_changed() if
7884 Tor is running as client. Also, log a stack trace for debugging as
7885 this function should only be called when Tor runs as server. Fixes
7886 bug 26892; bugfix on 0.1.1.9-alpha.
7887 - Refrain from mentioning bug 21018 in the logs, as it is already
7888 fixed. Fixes bug 25477; bugfix on 0.2.9.8.
7890 o Minor bugfixes (logging, documentation):
7891 - When SafeLogging is enabled, scrub IP address in
7892 channel_tls_process_netinfo_cell(). Also, add a note to manpage
7893 that scrubbing is not guaranteed on loglevels below Notice. Fixes
7894 bug 26882; bugfix on 0.2.4.10-alpha.
7896 o Minor bugfixes (netflow padding):
7897 - Ensure circuitmux queues are empty before scheduling or sending
7898 padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
7900 o Minor bugfixes (onion service v2):
7901 - Log at level "info", not "warning", in the case that we do not
7902 have a consensus when a .onion request comes in. This can happen
7903 normally while bootstrapping. Fixes bug 27040; bugfix
7906 o Minor bugfixes (onion service v3):
7907 - When the onion service directory can't be created or has the wrong
7908 permissions, do not log a stack trace. Fixes bug 27335; bugfix
7911 o Minor bugfixes (OS compatibility):
7912 - Properly handle configuration changes that move a listener to/from
7913 wildcard IP address. If the first attempt to bind a socket fails,
7914 close the old listener and try binding the socket again. Fixes bug
7915 17873; bugfix on 0.0.8pre-1.
7917 o Minor bugfixes (performance)::
7918 - Rework node_is_a_configured_bridge() to no longer call
7919 node_get_all_orports(), which was performing too many memory
7920 allocations. Fixes bug 27224; bugfix on 0.2.3.9.
7922 o Minor bugfixes (relay statistics):
7923 - Update relay descriptor on bandwidth changes only when the uptime
7924 is smaller than 24h, in order to reduce the efficiency of guard
7925 discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
7927 o Minor bugfixes (relays):
7928 - Consider the fact that we'll be making direct connections to our
7929 entry and guard nodes when computing the fraction of nodes that
7930 have their descriptors. Also, if we are using bridges and there is
7931 at least one bridge with a full descriptor, treat the fraction of
7932 guards available as 100%. Fixes bug 25886; bugfix on 0.2.4.10-alpha.
7933 Patch by Neel Chauhan.
7934 - Update the message logged on relays when DirCache is disabled.
7935 Since 0.3.3.5-rc, authorities require DirCache (V2Dir) for the
7936 Guard flag. Fixes bug 24312; bugfix on 0.3.3.5-rc.
7938 o Minor bugfixes (rust, protover):
7939 - Compute protover votes correctly in the rust version of the
7940 protover code. Previously, the protover rewrite in 24031 allowed
7941 repeated votes from the same voter for the same protocol version
7942 to be counted multiple times in protover_compute_vote(). Fixes bug
7943 27649; bugfix on 0.3.3.5-rc.
7944 - Reject protover names that contain invalid characters. Fixes bug
7945 27687; bugfix on 0.3.3.1-alpha.
7947 o Minor bugfixes (testing):
7948 - Fix two unit tests to work when HOME environment variable is not
7949 set. Fixes bug 27096; bugfix on 0.2.8.1-alpha.
7950 - If a unit test running in a subprocess exits abnormally or with a
7951 nonzero status code, treat the test as having failed, even if the
7952 test reported success. Without this fix, memory leaks don't cause
7953 the tests to fail, even with LeakSanitizer. Fixes bug 27658;
7954 bugfix on 0.2.2.4-alpha.
7955 - When logging a version mismatch in our openssl_version tests,
7956 report the actual offending version strings. Fixes bug 26152;
7957 bugfix on 0.2.9.1-alpha.
7958 - Fix forking tests on Windows when there is a space somewhere in
7959 the path. Fixes bug 26437; bugfix on 0.2.2.4-alpha.
7961 o Code simplification and refactoring:
7962 - 'updateFallbackDirs.py' now ignores the blacklist file, as it's not
7963 longer needed. Closes ticket 26502.
7964 - Include paths to header files within Tor are now qualified by
7965 directory within the top-level src directory.
7966 - Many structures have been removed from the centralized "or.h"
7967 header, and moved into their own headers. This will allow us to
7968 reduce the number of places in the code that rely on each
7969 structure's contents and layout. Closes ticket 26383.
7970 - Remove ATTR_NONNULL macro from codebase. Resolves ticket 26527.
7971 - Remove GetAdaptersAddresses_fn_t. The code that used it was
7972 removed as part of the 26481 refactor. Closes ticket 27467.
7973 - Rework Tor SOCKS server code to use Trunnel and benefit from
7974 autogenerated functions for parsing and generating SOCKS wire
7975 format. New implementation is cleaner, more maintainable and
7976 should be less prone to heartbleed-style vulnerabilities.
7977 Implements a significant fraction of ticket 3569.
7978 - Split sampled_guards_update_from_consensus() and
7979 select_entry_guard_for_circuit() into subfunctions. In
7980 entry_guards_update_primary() unite three smartlist enumerations
7981 into one and move smartlist comparison code out of the function.
7982 Closes ticket 21349.
7983 - Tor now assumes that you have standards-conformant stdint.h and
7984 inttypes.h headers when compiling. Closes ticket 26626.
7985 - Unify our bloom filter logic. Previously we had two copies of this
7986 code: one for routerlist filtering, and one for address set
7987 calculations. Closes ticket 26510.
7988 - Use the simpler strcmpstart() helper in
7989 rend_parse_v2_service_descriptor instead of strncmp(). Closes
7991 - Utility functions that can perform a DNS lookup are now wholly
7992 separated from those that can't, in separate headers and C
7993 modules. Closes ticket 26526.
7996 - Copy paragraph and URL to Tor's code of conduct document from
7997 CONTRIBUTING to new CODE_OF_CONDUCT file. Resolves ticket 26638.
7998 - Remove old instructions from INSTALL document. Closes ticket 26588.
7999 - Warn users that they should not include MyFamily line(s) in their
8000 torrc when running Tor bridge. Closes ticket 26908.
8003 - Tor no longer supports building with the dmalloc library. For
8004 debugging memory issues, we suggest using gperftools or msan
8005 instead. Closes ticket 26426.
8006 - Tor no longer attempts to run on Windows environments without the
8007 GetAdaptersAddresses() function. This function has existed since
8008 Windows XP, which is itself already older than we support.
8009 - Remove Tor2web functionality for version 2 onion services. The
8010 Tor2webMode and Tor2webRendezvousPoints options are now obsolete.
8011 (This feature was never shipped in vanilla Tor and it was only
8012 possible to use this feature by building the support at compile
8013 time. Tor2webMode is not implemented for version 3 onion services.)
8014 Closes ticket 26367.
8017 Changes in version 0.2.9.17 - 2018-09-10
8018 Tor 0.2.9.17 backports numerous bugfixes from later versions of Tor.
8020 o Minor features (compatibility, backport from 0.3.4.8):
8021 - Tell OpenSSL to maintain backward compatibility with previous
8022 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
8023 ciphers are disabled by default. Closes ticket 27344.
8025 o Minor features (continuous integration, backport from 0.3.4.7-rc):
8026 - Enable macOS builds in our Travis CI configuration. Closes
8028 - Install libcap-dev and libseccomp2-dev so these optional
8029 dependencies get tested on Travis CI. Closes ticket 26560.
8030 - Run asciidoc during Travis CI. Implements ticket 27087.
8031 - Use ccache in our Travis CI configuration. Closes ticket 26952.
8033 o Minor features (geoip):
8034 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
8035 Country database. Closes ticket 27089.
8037 o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
8038 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
8039 tell the compiler not to include the system malloc implementation.
8040 Fixes bug 20424; bugfix on 0.2.0.20-rc.
8042 o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
8043 - Silence a spurious compiler warning on the GetAdaptersAddresses
8044 function pointer cast. This issue is already fixed by 26481 in
8045 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
8046 bugfix on 0.2.3.11-alpha.
8047 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
8048 supported, and always fails. Some compilers warn about the
8049 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
8052 o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
8053 - Don't link or search for pthreads when building for Windows, even
8054 if we are using build environment (like mingw) that provides a
8055 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
8057 o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
8058 - Skip a pair of unreliable key generation tests on Windows, until
8059 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
8060 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
8062 o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
8063 - Pass the module flags to distcheck configure, and log the flags
8064 before running configure. (Backported to 0.2.9 and later as a
8065 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
8067 o Minor bugfixes (continuous integration, backport from 0.3.4.8):
8068 - When a Travis build fails, and showing a log fails, keep trying to
8069 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
8070 - When we use echo in Travis, don't pass a --flag as the first
8071 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
8073 o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
8074 - When voting for recommended versions, make sure that all of the
8075 versions are well-formed and parsable. Fixes bug 26485; bugfix
8078 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
8079 - Fix a bug in out sandboxing rules for the openat() syscall.
8080 Previously, no openat() call would be permitted, which would break
8081 filesystem operations on recent glibc versions. Fixes bug 25440;
8082 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
8084 o Minor bugfixes (onion services, backport from 0.3.4.8):
8085 - Silence a spurious compiler warning in
8086 rend_client_send_introduction(). Fixes bug 27463; bugfix
8089 o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
8090 - Log a protocol warning when single onion services or Tor2web clients
8091 fail to authenticate direct connections to relays.
8092 Fixes bug 26924; bugfix on 0.2.9.1-alpha.
8094 o Minor bugfixes (testing, backport from 0.3.4.6-rc):
8095 - Disable core dumps in test_bt.sh, to avoid failures in "make
8096 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
8098 o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
8099 - Before running make test-network-all, delete old logs and test
8100 result files, to avoid spurious failures. Fixes bug 27295; bugfix
8103 o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
8104 - Our "tortls/cert_matches_key" unit test no longer relies on
8105 OpenSSL internals. Previously, it relied on unsupported OpenSSL
8106 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
8107 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
8109 o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
8110 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
8111 27185; bugfix on 0.2.2.2-alpha.
8114 Changes in version 0.3.2.12 - 2018-09-10
8115 Tor 0.3.2.12 backport numerous fixes from later versions of Tor.
8117 o Minor features (compatibility, backport from 0.3.4.8):
8118 - Tell OpenSSL to maintain backward compatibility with previous
8119 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
8120 ciphers are disabled by default. Closes ticket 27344.
8122 o Minor features (continuous integration, backport from 0.3.4.7-rc):
8123 - Enable macOS builds in our Travis CI configuration. Closes
8125 - Install libcap-dev and libseccomp2-dev so these optional
8126 dependencies get tested on Travis CI. Closes ticket 26560.
8127 - Run asciidoc during Travis CI. Implements ticket 27087.
8128 - Use ccache in our Travis CI configuration. Closes ticket 26952.
8130 o Minor features (continuous integration, rust, backport from 0.3.4.7-rc):
8131 - Use cargo cache in our Travis CI configuration. Closes
8134 o Minor features (controller, backport from 0.3.4.6-rc):
8135 - The control port now exposes the list of HTTPTunnelPorts and
8136 ExtOrPorts via GETINFO net/listeners/httptunnel and
8137 net/listeners/extor respectively. Closes ticket 26647.
8139 o Minor features (directory authorities, backport from 0.3.4.7-rc):
8140 - Authorities no longer vote to make the subprotocol version
8141 "LinkAuth=1" a requirement: it is unsupportable with NSS, and
8142 hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
8144 o Minor features (geoip):
8145 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
8146 Country database. Closes ticket 27089.
8148 o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
8149 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
8150 tell the compiler not to include the system malloc implementation.
8151 Fixes bug 20424; bugfix on 0.2.0.20-rc.
8152 - Don't try to use a pragma to temporarily disable the
8153 -Wunused-const-variable warning if the compiler doesn't support
8154 it. Fixes bug 26785; bugfix on 0.3.2.11.
8156 o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
8157 - Silence a spurious compiler warning on the GetAdaptersAddresses
8158 function pointer cast. This issue is already fixed by 26481 in
8159 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
8160 bugfix on 0.2.3.11-alpha.
8161 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
8162 supported, and always fails. Some compilers warn about the
8163 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
8166 o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
8167 - Don't link or search for pthreads when building for Windows, even
8168 if we are using build environment (like mingw) that provides a
8169 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
8171 o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
8172 - Skip a pair of unreliable key generation tests on Windows, until
8173 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
8174 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
8176 o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
8177 - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
8178 - Pass the module flags to distcheck configure, and log the flags
8179 before running configure. (Backported to 0.2.9 and later as a
8180 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
8182 o Minor bugfixes (continuous integration, backport from 0.3.4.8):
8183 - When a Travis build fails, and showing a log fails, keep trying to
8184 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
8185 - When we use echo in Travis, don't pass a --flag as the first
8186 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
8188 o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
8189 - When voting for recommended versions, make sure that all of the
8190 versions are well-formed and parsable. Fixes bug 26485; bugfix
8193 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
8194 - Fix a bug in out sandboxing rules for the openat() syscall.
8195 Previously, no openat() call would be permitted, which would break
8196 filesystem operations on recent glibc versions. Fixes bug 25440;
8197 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
8199 o Minor bugfixes (logging, backport from 0.3.4.6-rc):
8200 - Improve the log message when connection initiators fail to
8201 authenticate direct connections to relays. Fixes bug 26927; bugfix
8204 o Minor bugfixes (onion services, backport from 0.3.4.7-rc):
8205 - Fix bug that causes services to not ever rotate their descriptors
8206 if they were getting SIGHUPed often. Fixes bug 26932; bugfix
8209 o Minor bugfixes (onion services, backport from 0.3.4.8):
8210 - Silence a spurious compiler warning in
8211 rend_client_send_introduction(). Fixes bug 27463; bugfix
8214 o Minor bugfixes (rust, backport from 0.3.4.7-rc):
8215 - Backport test_rust.sh from master. Fixes bug 26497; bugfix
8217 - Consistently use ../../.. as a fallback for $abs_top_srcdir in
8218 test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
8219 - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
8220 $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
8222 o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
8223 - Log a protocol warning when single onion services or Tor2web clients
8224 fail to authenticate direct connections to relays.
8225 Fixes bug 26924; bugfix on 0.2.9.1-alpha.
8227 o Minor bugfixes (testing, backport from 0.3.4.6-rc):
8228 - Disable core dumps in test_bt.sh, to avoid failures in "make
8229 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
8231 o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
8232 - When running make test-network-all, use the mixed+hs-v2 network.
8233 (A previous fix to chutney removed v3 onion services from the
8234 mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
8235 confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
8236 - Before running make test-network-all, delete old logs and test
8237 result files, to avoid spurious failures. Fixes bug 27295; bugfix
8240 o Minor bugfixes (testing, openssl compatibility):
8241 - Our "tortls/cert_matches_key" unit test no longer relies on OpenSSL
8242 internals. Previously, it relied on unsupported OpenSSL behavior in
8243 a way that caused it to crash with OpenSSL 1.0.2p. Fixes bug 27226;
8244 bugfix on 0.2.5.1-alpha.
8246 o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
8247 - Our "tortls/cert_matches_key" unit test no longer relies on
8248 OpenSSL internals. Previously, it relied on unsupported OpenSSL
8249 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
8250 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
8252 o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
8253 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
8254 27185; bugfix on 0.2.2.2-alpha.
8257 Changes in version 0.3.3.10 - 2018-09-10
8258 Tor 0.3.3.10 backports numerous fixes from later versions of Tor.
8260 o Minor features (bug workaround, backport from 0.3.4.7-rc):
8261 - Compile correctly on systems that provide the C11 stdatomic.h
8262 header, but where C11 atomic functions don't actually compile.
8263 Closes ticket 26779; workaround for Debian issue 903709.
8265 o Minor features (compatibility, backport from 0.3.4.8):
8266 - Tell OpenSSL to maintain backward compatibility with previous
8267 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
8268 ciphers are disabled by default. Closes ticket 27344.
8270 o Minor features (continuous integration, backport from 0.3.4.7-rc):
8271 - Backport Travis rust distcheck to 0.3.3. Closes ticket 24629.
8272 - Enable macOS builds in our Travis CI configuration. Closes
8274 - Install libcap-dev and libseccomp2-dev so these optional
8275 dependencies get tested on Travis CI. Closes ticket 26560.
8276 - Run asciidoc during Travis CI. Implements ticket 27087.
8277 - Use ccache in our Travis CI configuration. Closes ticket 26952.
8279 o Minor features (continuous integration, rust, backport from 0.3.4.7-rc):
8280 - Use cargo cache in our Travis CI configuration. Closes
8283 o Minor features (controller, backport from 0.3.4.6-rc):
8284 - The control port now exposes the list of HTTPTunnelPorts and
8285 ExtOrPorts via GETINFO net/listeners/httptunnel and
8286 net/listeners/extor respectively. Closes ticket 26647.
8288 o Minor features (directory authorities, backport from 0.3.4.7-rc):
8289 - Authorities no longer vote to make the subprotocol version
8290 "LinkAuth=1" a requirement: it is unsupportable with NSS, and
8291 hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
8293 o Minor features (geoip):
8294 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
8295 Country database. Closes ticket 27089.
8297 o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
8298 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
8299 tell the compiler not to include the system malloc implementation.
8300 Fixes bug 20424; bugfix on 0.2.0.20-rc.
8301 - Don't try to use a pragma to temporarily disable the
8302 -Wunused-const-variable warning if the compiler doesn't support
8303 it. Fixes bug 26785; bugfix on 0.3.2.11.
8305 o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
8306 - Silence a spurious compiler warning on the GetAdaptersAddresses
8307 function pointer cast. This issue is already fixed by 26481 in
8308 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
8309 bugfix on 0.2.3.11-alpha.
8310 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
8311 supported, and always fails. Some compilers warn about the
8312 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
8315 o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
8316 - Don't link or search for pthreads when building for Windows, even
8317 if we are using build environment (like mingw) that provides a
8318 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
8320 o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
8321 - Skip a pair of unreliable key generation tests on Windows, until
8322 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
8323 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
8325 o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
8326 - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
8327 - Pass the module flags to distcheck configure, and log the flags
8328 before running configure. (Backported to 0.2.9 and later as a
8329 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
8331 o Minor bugfixes (continuous integration, backport from 0.3.4.8):
8332 - When a Travis build fails, and showing a log fails, keep trying to
8333 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
8334 - When we use echo in Travis, don't pass a --flag as the first
8335 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
8337 o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
8338 - When voting for recommended versions, make sure that all of the
8339 versions are well-formed and parsable. Fixes bug 26485; bugfix
8342 o Minor bugfixes (in-process restart, backport from 0.3.4.7-rc):
8343 - Always call tor_free_all() when leaving tor_run_main(). When we
8344 did not, restarting tor in-process would cause an assertion
8345 failure. Fixes bug 26948; bugfix on 0.3.3.1-alpha.
8347 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
8348 - Fix a bug in our sandboxing rules for the openat() syscall.
8349 Previously, no openat() call would be permitted, which would break
8350 filesystem operations on recent glibc versions. Fixes bug 25440;
8351 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
8353 o Minor bugfixes (logging, backport from 0.3.4.6-rc):
8354 - Improve the log message when connection initiators fail to
8355 authenticate direct connections to relays. Fixes bug 26927; bugfix
8358 o Minor bugfixes (onion services, backport from 0.3.4.7-rc):
8359 - Fix bug that causes services to not ever rotate their descriptors
8360 if they were getting SIGHUPed often. Fixes bug 26932; bugfix
8363 o Minor bugfixes (onion services, backport from 0.3.4.8):
8364 - Silence a spurious compiler warning in
8365 rend_client_send_introduction(). Fixes bug 27463; bugfix
8368 o Minor bugfixes (portability, backport from 0.3.4.6-rc):
8369 - Work around two different bugs in the OS X 10.10 and later SDKs
8370 that would prevent us from successfully targeting earlier versions
8371 of OS X. Fixes bug 26876; bugfix on 0.3.3.1-alpha.
8373 o Minor bugfixes (portability, backport from 0.3.4.7-rc):
8374 - Fix compilation of the unit tests on GNU/Hurd, which does not
8375 define PATH_MAX. Fixes bug 26873; bugfix on 0.3.3.1-alpha. Patch
8378 o Minor bugfixes (rust, backport from 0.3.4.7-rc):
8379 - Backport test_rust.sh from master. Fixes bug 26497; bugfix
8381 - Consistently use ../../.. as a fallback for $abs_top_srcdir in
8382 test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
8383 - Protover parsing was accepting the presence of whitespace in
8384 version strings, which the C implementation would choke on, e.g.
8385 "Desc=1\t,2". Fixes bug 27177; bugfix on 0.3.3.5-rc.
8386 - Protover parsing was ignoring a 2nd hyphen and everything after
8387 it, accepting entries like "Link=1-5-foo". Fixes bug 27164; bugfix
8389 - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
8390 $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
8391 - cd to ${abs_top_builddir}/src/rust before running cargo in
8392 src/test/test_rust.sh. This makes the working directory consistent
8393 between builds and tests. Fixes bug 26497; bugfix on 0.3.3.2-alpha.
8395 o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
8396 - Log a protocol warning when single onion services or Tor2web clients
8397 fail to authenticate direct connections to relays.
8398 Fixes bug 26924; bugfix on 0.2.9.1-alpha.
8400 o Minor bugfixes (testing, backport from 0.3.4.6-rc):
8401 - Disable core dumps in test_bt.sh, to avoid failures in "make
8402 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
8404 o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
8405 - When running make test-network-all, use the mixed+hs-v2 network.
8406 (A previous fix to chutney removed v3 onion services from the
8407 mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
8408 confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
8409 - Before running make test-network-all, delete old logs and test
8410 result files, to avoid spurious failures. Fixes bug 27295; bugfix
8413 o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
8414 - Our "tortls/cert_matches_key" unit test no longer relies on
8415 OpenSSL internals. Previously, it relied on unsupported OpenSSL
8416 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
8417 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
8419 o Minor bugfixes (v3 onion services, backport from 0.3.4.6-rc):
8420 - Stop sending ed25519 link specifiers in v3 onion service introduce
8421 cells and descriptors, when the rendezvous or introduction point
8422 doesn't support ed25519 link authentication. Fixes bug 26627;
8423 bugfix on 0.3.2.4-alpha.
8425 o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
8426 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
8427 27185; bugfix on 0.2.2.2-alpha.
8430 Changes in version 0.3.4.8 - 2018-09-10
8431 Tor 0.3.4.8 is the first stable release in its series; it includes
8432 compilation and portability fixes.
8434 The Tor 0.3.4 series includes improvements for running Tor in
8435 low-power and embedded environments, which should help performance in
8436 general. We've begun work on better modularity, and included preliminary
8437 changes on the directory authority side to accommodate a new bandwidth
8438 measurement system. We've also integrated more continuous-integration
8439 systems into our development process, and made corresponding changes to
8440 Tor's testing infrastructure. Finally, we've continued to refine
8441 our anti-denial-of-service code.
8443 Below are the changes since 0.3.4.7-rc. For a complete list of changes
8444 since 0.3.3.9, see the ReleaseNotes file.
8446 o Minor features (compatibility):
8447 - Tell OpenSSL to maintain backward compatibility with previous
8448 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
8449 ciphers are disabled by default. Closes ticket 27344.
8451 o Minor features (continuous integration):
8452 - Log the compiler path and version during Appveyor builds.
8453 Implements ticket 27449.
8454 - Show config.log and test-suite.log after failed Appveyor builds.
8455 Also upload the zipped full logs as a build artifact. Implements
8458 o Minor bugfixes (compilation):
8459 - Silence a spurious compiler warning on the GetAdaptersAddresses
8460 function pointer cast. This issue is already fixed by 26481 in
8461 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
8462 bugfix on 0.2.3.11-alpha.
8463 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
8464 supported, and always fails. Some compilers warn about the
8465 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
8468 o Minor bugfixes (continuous integration):
8469 - Disable gcc hardening in Appveyor Windows 64-bit builds. As of
8470 August 29 2018, Appveyor images come with gcc 8.2.0 by default.
8471 Executables compiled for 64-bit Windows with this version of gcc
8472 crash when Tor's --enable-gcc-hardening flag is set. Fixes bug
8473 27460; bugfix on 0.3.4.1-alpha.
8474 - When a Travis build fails, and showing a log fails, keep trying to
8475 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
8476 - When we use echo in Travis, don't pass a --flag as the first
8477 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
8479 o Minor bugfixes (onion services):
8480 - Silence a spurious compiler warning in
8481 rend_client_send_introduction(). Fixes bug 27463; bugfix
8484 o Minor bugfixes (testing, chutney):
8485 - When running make test-network-all, use the mixed+hs-v2 network.
8486 (A previous fix to chutney removed v3 onion services from the
8487 mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
8488 confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
8489 - Before running make test-network-all, delete old logs and test
8490 result files, to avoid spurious failures. Fixes bug 27295; bugfix
8493 Changes in version 0.3.4.7-rc - 2018-08-24
8494 Tor 0.3.4.7-rc fixes several small compilation, portability, and
8495 correctness issues in previous versions of Tor. This version is a
8496 release candidate: if no serious bugs are found, we expect that the
8497 stable 0.3.4 release will be (almost) the same as this release.
8499 o Minor features (bug workaround):
8500 - Compile correctly on systems that provide the C11 stdatomic.h
8501 header, but where C11 atomic functions don't actually compile.
8502 Closes ticket 26779; workaround for Debian issue 903709.
8504 o Minor features (continuous integration):
8505 - Backport Travis rust distcheck to 0.3.3. Closes ticket 24629.
8506 - Enable macOS builds in our Travis CI configuration. Closes
8508 - Install libcap-dev and libseccomp2-dev so these optional
8509 dependencies get tested on Travis CI. Closes ticket 26560.
8510 - Only post Appveyor IRC notifications when the build fails.
8511 Implements ticket 27275.
8512 - Run asciidoc during Travis CI. Implements ticket 27087.
8513 - Use ccache in our Travis CI configuration. Closes ticket 26952.
8515 o Minor features (continuous integration, rust):
8516 - Use cargo cache in our Travis CI configuration. Closes
8519 o Minor features (directory authorities):
8520 - Authorities no longer vote to make the subprotocol version
8521 "LinkAuth=1" a requirement: it is unsupportable with NSS, and
8522 hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
8524 o Minor features (geoip):
8525 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
8526 Country database. Closes ticket 27089.
8528 o Minor bugfixes (compilation, windows):
8529 - Don't link or search for pthreads when building for Windows, even
8530 if we are using build environment (like mingw) that provides a
8531 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
8533 o Minor bugfixes (continuous integration):
8534 - Improve Appveyor CI IRC logging. Generate correct branches and
8535 URLs for pull requests and tags. Use unambiguous short commits.
8536 Fixes bug 26979; bugfix on master.
8537 - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
8538 - Pass the module flags to distcheck configure, and log the flags
8539 before running configure. (Backported to 0.2.9 and later as a
8540 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
8542 o Minor bugfixes (in-process restart):
8543 - Always call tor_free_all() when leaving tor_run_main(). When we
8544 did not, restarting tor in-process would cause an assertion
8545 failure. Fixes bug 26948; bugfix on 0.3.3.1-alpha.
8547 o Minor bugfixes (linux seccomp2 sandbox):
8548 - Fix a bug in out sandboxing rules for the openat() syscall.
8549 Previously, no openat() call would be permitted, which would break
8550 filesystem operations on recent glibc versions. Fixes bug 25440;
8551 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
8553 o Minor bugfixes (onion services):
8554 - Fix bug that causes services to not ever rotate their descriptors
8555 if they were getting SIGHUPed often. Fixes bug 26932; bugfix
8558 o Minor bugfixes (portability):
8559 - Fix compilation of the unit tests on GNU/Hurd, which does not
8560 define PATH_MAX. Fixes bug 26873; bugfix on 0.3.3.1-alpha. Patch
8563 o Minor bugfixes (rust):
8564 - Backport test_rust.sh from master. Fixes bug 26497; bugfix
8566 - Consistently use ../../.. as a fallback for $abs_top_srcdir in
8567 test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
8568 - Protover parsing was accepting the presence of whitespace in
8569 version strings, which the C implementation would choke on, e.g.
8570 "Desc=1\t,2". Fixes bug 27177; bugfix on 0.3.3.5-rc.
8571 - Protover parsing was ignoring a 2nd hyphen and everything after
8572 it, accepting entries like "Link=1-5-foo". Fixes bug 27164; bugfix
8574 - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
8575 $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
8576 - cd to ${abs_top_builddir}/src/rust before running cargo in
8577 src/test/test_rust.sh. This makes the working directory consistent
8578 between builds and tests. Fixes bug 26497; bugfix on 0.3.3.2-alpha.
8580 o Minor bugfixes (testing, bootstrap):
8581 - When calculating bootstrap progress, check exit policies and the
8582 exit flag. Previously, Tor would only check the exit flag, which
8583 caused race conditions in small and fast networks like chutney.
8584 Fixes bug 27236; bugfix on 0.2.6.3-alpha.
8586 o Minor bugfixes (testing, openssl compatibility):
8587 - Our "tortls/cert_matches_key" unit test no longer relies on
8588 OpenSSL internals. Previously, it relied on unsupported OpenSSL
8589 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
8590 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
8592 o Minor bugfixes (Windows, compilation):
8593 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
8594 27185; bugfix on 0.2.2.2-alpha.
8597 Changes in version 0.3.4.6-rc - 2018-08-06
8598 Tor 0.3.4.6-rc fixes several small compilation, portability, and
8599 correctness issues in previous versions of Tor. This version is a
8600 release candidate: if no serious bugs are found, we expect that the
8601 stable 0.3.4 release will be (almost) the same as this release.
8603 o Major bugfixes (event scheduler):
8604 - When we enable a periodic event, schedule it in the event loop
8605 rather than running it immediately. Previously, we would re-run
8606 periodic events immediately in the middle of (for example)
8607 changing our options, with unpredictable effects. Fixes bug 27003;
8608 bugfix on 0.3.4.1-alpha.
8610 o Minor features (compilation):
8611 - When building Tor, prefer to use Python 3 over Python 2, and more
8612 recent (contemplated) versions over older ones. Closes
8614 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
8615 tell the compiler not to include the system malloc implementation.
8616 Fixes bug 20424; bugfix on 0.2.0.20-rc.
8617 - Don't try to use a pragma to temporarily disable the
8618 -Wunused-const-variable warning if the compiler doesn't support
8619 it. Fixes bug 26785; bugfix on 0.3.2.11.
8621 o Minor bugfixes (continuous integration):
8622 - Skip a pair of unreliable key generation tests on Windows, until
8623 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
8624 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
8626 o Minor features (controller):
8627 - The control port now exposes the list of HTTPTunnelPorts and
8628 ExtOrPorts via GETINFO net/listeners/httptunnel and
8629 net/listeners/extor respectively. Closes ticket 26647.
8631 o Minor bugfixes (directory authority):
8632 - When voting for recommended versions, make sure that all of the
8633 versions are well-formed and parsable. Fixes bug 26485; bugfix
8636 o Minor features (geoip):
8637 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
8638 Country database. Closes ticket 26674.
8640 o Minor features (Rust, portability):
8641 - Rust cross-compilation is now supported. Closes ticket 25895.
8643 o Minor bugfixes (compilation):
8644 - Update build system so that tor builds again with --disable-unittests
8645 after recent refactoring. Fixes bug 26789; bugfix on 0.3.4.3-alpha.
8646 - Fix a compilation warning on some versions of GCC when building
8647 code that calls routerinfo_get_my_routerinfo() twice, assuming
8648 that the second call will succeed if the first one did. Fixes bug
8649 26269; bugfix on 0.2.8.2-alpha.
8651 o Minor bugfixes (controller):
8652 - Report the port correctly when a port is configured to bind to
8653 "auto". Fixes bug 26568; bugfix on 0.3.4.1-alpha.
8654 - Parse the "HSADDRESS=" parameter in HSPOST commands properly.
8655 Previously, it was misparsed and ignored. Fixes bug 26523; bugfix
8656 on 0.3.3.1-alpha. Patch by "akwizgran".
8658 o Minor bugfixes (correctness, flow control):
8659 - Upon receiving a stream-level SENDME cell, verify that our window
8660 has not grown too large. Fixes bug 26214; bugfix on svn
8663 o Minor bugfixes (memory, correctness):
8664 - Fix a number of small memory leaks identified by coverity. Fixes
8665 bug 26467; bugfix on numerous Tor versions.
8667 o Minor bugfixes (logging):
8668 - Improve the log message when connection initiators fail to
8669 authenticate direct connections to relays. Fixes bug 26927; bugfix
8672 o Minor bugfixes (portability):
8673 - Avoid a compilation error in test_bwmgt.c on Solaris 10. Fixes bug
8674 26994; bugfix on 0.3.4.1-alpha.
8675 - Work around two different bugs in the OS X 10.10 and later SDKs
8676 that would prevent us from successfully targeting earlier versions
8677 of OS X. Fixes bug 26876; bugfix on 0.3.3.1-alpha.
8679 o Minor bugfixes (single onion services, Tor2web):
8680 - Log a protocol warning when single onion services or Tor2web
8681 clients fail to authenticate direct connections to relays. Fixes
8682 bug 26924; bugfix on 0.2.9.1-alpha.
8684 o Minor bugfixes (testing):
8685 - Disable core dumps in test_bt.sh, to avoid failures in "make
8686 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
8688 o Minor bugfixes (testing, compatibility):
8689 - When running the ntor_ref.py and hs_ntor_ref.py tests, make sure
8690 only to pass strings (rather than "bytes" objects) to the Python
8691 subprocess module. Python 3 on Windows seems to require this.
8692 Fixes bug 26535; bugfix on 0.2.5.5-alpha (for ntor_ref.py) and
8693 0.3.1.1-alpha (for hs_ntor_ref.py).
8695 o Minor bugfixes (v3 onion services):
8696 - Stop sending ed25519 link specifiers in v3 onion service introduce
8697 cells and descriptors, when the rendezvous or introduction point
8698 doesn't support ed25519 link authentication. Fixes bug 26627;
8699 bugfix on 0.3.2.4-alpha.
8702 Changes in version 0.3.4.5-rc - 2018-07-13
8703 Tor 0.3.4.5-rc moves to a new bridge authority, meaning people running
8704 bridge relays should upgrade.
8706 o Directory authority changes:
8707 - The "Bifroest" bridge authority has been retired; the new bridge
8708 authority is "Serge", and it is operated by George from the
8709 TorBSD project. Closes ticket 26771.
8712 Changes in version 0.3.3.9 - 2018-07-13
8713 Tor 0.3.3.9 moves to a new bridge authority, meaning people running
8714 bridge relays should upgrade.
8716 o Directory authority changes:
8717 - The "Bifroest" bridge authority has been retired; the new bridge
8718 authority is "Serge", and it is operated by George from the
8719 TorBSD project. Closes ticket 26771.
8722 Changes in version 0.3.2.11 - 2018-07-13
8723 Tor 0.3.2.11 moves to a new bridge authority, meaning people running
8724 bridge relays should upgrade. We also take this opportunity to backport
8727 o Directory authority changes:
8728 - The "Bifroest" bridge authority has been retired; the new bridge
8729 authority is "Serge", and it is operated by George from the
8730 TorBSD project. Closes ticket 26771.
8732 o Directory authority changes (backport from 0.3.3.7):
8733 - Add an IPv6 address for the "dannenberg" directory authority.
8734 Closes ticket 26343.
8736 o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
8737 - When directory authorities read a zero-byte bandwidth file, they
8738 would previously log a warning with the contents of an
8739 uninitialised buffer. They now log a warning about the empty file
8740 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
8742 o Major bugfixes (onion service, backport from 0.3.4.1-alpha):
8743 - Correctly detect when onion services get disabled after HUP. Fixes
8744 bug 25761; bugfix on 0.3.2.1.
8746 o Minor features (sandbox, backport from 0.3.3.4-alpha):
8747 - Explicitly permit the poll() system call when the Linux
8748 seccomp2-based sandbox is enabled: apparently, some versions of
8749 libc use poll() when calling getpwnam(). Closes ticket 25313.
8751 o Minor feature (continuous integration, backport from 0.3.3.5-rc):
8752 - Update the Travis CI configuration to use the stable Rust channel,
8753 now that we have decided to require that. Closes ticket 25714.
8755 o Minor features (continuous integration, backport from 0.3.4.1-alpha):
8756 - Our .travis.yml configuration now includes support for testing the
8757 results of "make distcheck". (It's not uncommon for "make check"
8758 to pass but "make distcheck" to fail.) Closes ticket 25814.
8759 - Our Travis CI configuration now integrates with the Coveralls
8760 coverage analysis tool. Closes ticket 25818.
8762 o Minor features (relay, diagnostic, backport from 0.3.4.3-alpha):
8763 - Add several checks to detect whether Tor relays are uploading
8764 their descriptors without specifying why they regenerated them.
8765 Diagnostic for ticket 25686.
8767 o Minor features (compilation, backport from 0.3.4.4-rc):
8768 - When building Tor, prefer to use Python 3 over Python 2, and more
8769 recent (contemplated) versions over older ones. Closes
8772 o Minor features (geoip):
8773 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
8774 Country database. Closes ticket 26674.
8776 o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
8777 - Upon receiving a malformed connected cell, stop processing the
8778 cell immediately. Previously we would mark the connection for
8779 close, but continue processing the cell as if the connection were
8780 open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
8782 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
8783 - Allow the nanosleep() system call, which glibc uses to implement
8784 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
8786 o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
8787 - When running the hs_ntor_ref.py test, make sure only to pass
8788 strings (rather than "bytes" objects) to the Python subprocess
8789 module. Python 3 on Windows seems to require this. Fixes bug
8790 26535; bugfix on 0.3.1.1-alpha.
8791 - When running the ntor_ref.py test, make sure only to pass strings
8792 (rather than "bytes" objects) to the Python subprocess module.
8793 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
8796 o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
8797 - Work around a change in OpenSSL 1.1.1 where return values that
8798 would previously indicate "no password" now indicate an empty
8799 password. Without this workaround, Tor instances running with
8800 OpenSSL 1.1.1 would accept descriptors that other Tor instances
8801 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
8803 o Minor bugfixes (documentation, backport from 0.3.3.5-rc):
8804 - Document that the PerConnBW{Rate,Burst} options will fall back to
8805 their corresponding consensus parameters only if those parameters
8806 are set. Previously we had claimed that these values would always
8807 be set in the consensus. Fixes bug 25296; bugfix on 0.2.2.7-alpha.
8809 o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
8810 - Fix a compilation warning on some versions of GCC when building
8811 code that calls routerinfo_get_my_routerinfo() twice, assuming
8812 that the second call will succeed if the first one did. Fixes bug
8813 26269; bugfix on 0.2.8.2-alpha.
8815 o Minor bugfixes (client, backport from 0.3.4.1-alpha):
8816 - Don't consider Tor running as a client if the ControlPort is open,
8817 but no actual client ports are open. Fixes bug 26062; bugfix
8820 o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
8821 - Prevent a possible out-of-bounds smartlist read in
8822 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
8824 o Minor bugfixes (C correctness, backport from 0.3.3.4-alpha):
8825 - Fix a very unlikely (impossible, we believe) null pointer
8826 dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
8827 Coverity; this is CID 1430932.
8829 o Minor bugfixes (onion service, backport from 0.3.4.1-alpha):
8830 - Fix a memory leak when a v3 onion service is configured and gets a
8831 SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
8832 - When parsing the descriptor signature, look for the token plus an
8833 extra white-space at the end. This is more correct but also will
8834 allow us to support new fields that might start with "signature".
8835 Fixes bug 26069; bugfix on 0.3.0.1-alpha.
8837 o Minor bugfixes (relay, backport from 0.3.4.3-alpha):
8838 - Relays now correctly block attempts to re-extend to the previous
8839 relay by Ed25519 identity. Previously they would warn in this
8840 case, but not actually reject the attempt. Fixes bug 26158; bugfix
8843 o Minor bugfixes (relay, crash, backport from 0.3.4.1-alpha):
8844 - Avoid a crash when running with DirPort set but ORPort turned off.
8845 Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
8847 o Minor bugfixes (compilation, backport from 0.3.4.2-alpha):
8848 - Silence unused-const-variable warnings in zstd.h with some GCC
8849 versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
8851 o Minor bugfixes (testing, backport from 0.3.3.4-alpha):
8852 - Avoid intermittent test failures due to a test that had relied on
8853 onion service introduction point creation finishing within 5
8854 seconds of real clock time. Fixes bug 25450; bugfix
8857 o Minor bugfixes (compilation, backport from 0.3.3.4-alpha):
8858 - Fix a C99 compliance issue in our configuration script that caused
8859 compilation issues when compiling Tor with certain versions of
8860 xtools. Fixes bug 25474; bugfix on 0.3.2.5-alpha.
8862 o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
8863 - Fix a number of small memory leaks identified by coverity. Fixes
8864 bug 26467; bugfix on numerous Tor versions.
8866 o Code simplification and refactoring (backport from 0.3.3.5-rc):
8867 - Move the list of default directory authorities to its own file.
8868 Closes ticket 24854. Patch by "beastr0".
8871 Changes in version 0.2.9.16 - 2018-07-13
8872 Tor 0.2.9.16 moves to a new bridge authority, meaning people running
8873 bridge relays should upgrade. We also take this opportunity to backport
8876 o Directory authority changes:
8877 - The "Bifroest" bridge authority has been retired; the new bridge
8878 authority is "Serge", and it is operated by George from the
8879 TorBSD project. Closes ticket 26771.
8881 o Directory authority changes (backport from 0.3.3.7):
8882 - Add an IPv6 address for the "dannenberg" directory authority.
8883 Closes ticket 26343.
8885 o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
8886 - When directory authorities read a zero-byte bandwidth file, they
8887 would previously log a warning with the contents of an
8888 uninitialised buffer. They now log a warning about the empty file
8889 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
8891 o Minor features (sandbox, backport from 0.3.3.4-alpha):
8892 - Explicitly permit the poll() system call when the Linux
8893 seccomp2-based sandbox is enabled: apparently, some versions of
8894 libc use poll() when calling getpwnam(). Closes ticket 25313.
8896 o Minor features (continuous integration, backport from 0.3.4.1-alpha):
8897 - Our .travis.yml configuration now includes support for testing the
8898 results of "make distcheck". (It's not uncommon for "make check"
8899 to pass but "make distcheck" to fail.) Closes ticket 25814.
8900 - Our Travis CI configuration now integrates with the Coveralls
8901 coverage analysis tool. Closes ticket 25818.
8903 o Minor features (compilation, backport from 0.3.4.4-rc):
8904 - When building Tor, prefer to use Python 3 over Python 2, and more
8905 recent (contemplated) versions over older ones. Closes
8908 o Minor features (geoip):
8909 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
8910 Country database. Closes ticket 26674.
8912 o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
8913 - Upon receiving a malformed connected cell, stop processing the
8914 cell immediately. Previously we would mark the connection for
8915 close, but continue processing the cell as if the connection were
8916 open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
8918 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
8919 - Allow the nanosleep() system call, which glibc uses to implement
8920 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
8922 o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
8923 - When running the ntor_ref.py test, make sure only to pass strings
8924 (rather than "bytes" objects) to the Python subprocess module.
8925 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
8928 o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
8929 - Work around a change in OpenSSL 1.1.1 where return values that
8930 would previously indicate "no password" now indicate an empty
8931 password. Without this workaround, Tor instances running with
8932 OpenSSL 1.1.1 would accept descriptors that other Tor instances
8933 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
8935 o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
8936 - Fix a compilation warning on some versions of GCC when building
8937 code that calls routerinfo_get_my_routerinfo() twice, assuming
8938 that the second call will succeed if the first one did. Fixes bug
8939 26269; bugfix on 0.2.8.2-alpha.
8941 o Minor bugfixes (client, backport from 0.3.4.1-alpha):
8942 - Don't consider Tor running as a client if the ControlPort is open,
8943 but no actual client ports are open. Fixes bug 26062; bugfix
8946 o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
8947 - Prevent a possible out-of-bounds smartlist read in
8948 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
8950 o Minor bugfixes (C correctness, backport from 0.3.3.4-alpha):
8951 - Fix a very unlikely (impossible, we believe) null pointer
8952 dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
8953 Coverity; this is CID 1430932.
8955 o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
8956 - Fix a number of small memory leaks identified by coverity. Fixes
8957 bug 26467; bugfix on numerous Tor versions.
8959 o Code simplification and refactoring (backport from 0.3.3.5-rc):
8960 - Move the list of default directory authorities to its own file.
8961 Closes ticket 24854. Patch by "beastr0".
8964 Changes in version 0.3.4.4-rc - 2018-07-09
8965 Tor 0.3.4.4-rc fixes several small compilation, portability, and
8966 correctness issues in previous versions of Tor. This version is a
8967 release candidate: if no serious bugs are found, we expect that the
8968 stable 0.3.4 release will be (almost) the same as this release.
8970 o Minor features (compilation):
8971 - When building Tor, prefer to use Python 3 over Python 2, and more
8972 recent (contemplated) versions over older ones. Closes
8975 o Minor features (geoip):
8976 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
8977 Country database. Closes ticket 26674.
8979 o Minor features (Rust, portability):
8980 - Rust cross-compilation is now supported. Closes ticket 25895.
8982 o Minor bugfixes (compilation):
8983 - Fix a compilation warning on some versions of GCC when building
8984 code that calls routerinfo_get_my_routerinfo() twice, assuming
8985 that the second call will succeed if the first one did. Fixes bug
8986 26269; bugfix on 0.2.8.2-alpha.
8988 o Minor bugfixes (control port):
8989 - Report the port correctly when a port is configured to bind to
8990 "auto". Fixes bug 26568; bugfix on 0.3.4.1-alpha.
8991 - Handle the HSADDRESS= argument to the HSPOST command properly.
8992 (Previously, this argument was misparsed and thus ignored.) Fixes
8993 bug 26523; bugfix on 0.3.3.1-alpha. Patch by "akwizgran".
8995 o Minor bugfixes (correctness, flow control):
8996 - Upon receiving a stream-level SENDME cell, verify that our window
8997 has not grown too large. Fixes bug 26214; bugfix on svn
9000 o Minor bugfixes (memory, correctness):
9001 - Fix a number of small memory leaks identified by coverity. Fixes
9002 bug 26467; bugfix on numerous Tor versions.
9004 o Minor bugfixes (testing, compatibility):
9005 - When running the hs_ntor_ref.py test, make sure only to pass
9006 strings (rather than "bytes" objects) to the Python subprocess
9007 module. Python 3 on Windows seems to require this. Fixes bug
9008 26535; bugfix on 0.3.1.1-alpha.
9009 - When running the ntor_ref.py test, make sure only to pass strings
9010 (rather than "bytes" objects) to the Python subprocess module.
9011 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
9015 Changes in version 0.3.3.8 - 2018-07-09
9016 Tor 0.3.3.8 backports several changes from the 0.3.4.x series, including
9017 fixes for a memory leak affecting directory authorities.
9019 o Major bugfixes (directory authority, backport from 0.3.4.3-alpha):
9020 - Stop leaking memory on directory authorities when planning to
9021 vote. This bug was crashing authorities by exhausting their
9022 memory. Fixes bug 26435; bugfix on 0.3.3.6.
9024 o Major bugfixes (rust, testing, backport from 0.3.4.3-alpha):
9025 - Make sure that failing tests in Rust will actually cause the build
9026 to fail: previously, they were ignored. Fixes bug 26258; bugfix
9029 o Minor features (compilation, backport from 0.3.4.4-rc):
9030 - When building Tor, prefer to use Python 3 over Python 2, and more
9031 recent (contemplated) versions over older ones. Closes
9034 o Minor features (geoip):
9035 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
9036 Country database. Closes ticket 26674.
9038 o Minor features (relay, diagnostic, backport from 0.3.4.3-alpha):
9039 - Add several checks to detect whether Tor relays are uploading
9040 their descriptors without specifying why they regenerated them.
9041 Diagnostic for ticket 25686.
9043 o Minor bugfixes (circuit path selection, backport from 0.3.4.1-alpha):
9044 - Don't count path selection failures as circuit build failures.
9045 This change should eliminate cases where Tor blames its guard or
9046 the network for situations like insufficient microdescriptors
9047 and/or overly restrictive torrc settings. Fixes bug 25705; bugfix
9050 o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
9051 - Fix a compilation warning on some versions of GCC when building
9052 code that calls routerinfo_get_my_routerinfo() twice, assuming
9053 that the second call will succeed if the first one did. Fixes bug
9054 26269; bugfix on 0.2.8.2-alpha.
9056 o Minor bugfixes (control port, backport from 0.3.4.4-rc):
9057 - Handle the HSADDRESS= argument to the HSPOST command properly.
9058 (Previously, this argument was misparsed and thus ignored.) Fixes
9059 bug 26523; bugfix on 0.3.3.1-alpha. Patch by "akwizgran".
9061 o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
9062 - Fix a number of small memory leaks identified by coverity. Fixes
9063 bug 26467; bugfix on numerous Tor versions.
9065 o Minor bugfixes (relay, backport from 0.3.4.3-alpha):
9066 - Relays now correctly block attempts to re-extend to the previous
9067 relay by Ed25519 identity. Previously they would warn in this
9068 case, but not actually reject the attempt. Fixes bug 26158; bugfix
9071 o Minor bugfixes (restart-in-process, backport from 0.3.4.1-alpha):
9072 - When shutting down, Tor now clears all the flags in the control.c
9073 module. This should prevent a bug where authentication cookies are
9074 not generated on restart. Fixes bug 25512; bugfix on 0.3.3.1-alpha.
9076 o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
9077 - When running the hs_ntor_ref.py test, make sure only to pass
9078 strings (rather than "bytes" objects) to the Python subprocess
9079 module. Python 3 on Windows seems to require this. Fixes bug
9080 26535; bugfix on 0.3.1.1-alpha.
9081 - When running the ntor_ref.py test, make sure only to pass strings
9082 (rather than "bytes" objects) to the Python subprocess module.
9083 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
9087 Changes in version 0.3.4.3-alpha - 2018-06-26
9088 Tor 0.3.4.3-alpha fixes several bugs in earlier versions, including
9089 one that was causing stability issues on directory authorities.
9091 o Major bugfixes (directory authority):
9092 - Stop leaking memory on directory authorities when planning to
9093 vote. This bug was crashing authorities by exhausting their
9094 memory. Fixes bug 26435; bugfix on 0.3.3.6.
9096 o Major bugfixes (rust, testing):
9097 - Make sure that failing tests in Rust will actually cause the build
9098 to fail: previously, they were ignored. Fixes bug 26258; bugfix
9101 o Minor feature (directory authorities):
9102 - Stop warning about incomplete bw lines before the first complete
9103 bw line has been found, so that additional header lines can be
9104 ignored. Fixes bug 25960; bugfix on 0.2.2.1-alpha
9106 o Minor features (relay, diagnostic):
9107 - Add several checks to detect whether Tor relays are uploading
9108 their descriptors without specifying why they regenerated them.
9109 Diagnostic for ticket 25686.
9111 o Minor features (unit tests):
9112 - Test complete bandwidth measurements files, and test that
9113 incomplete bandwidth lines only give warnings when the end of the
9114 header has not been detected. Fixes bug 25947; bugfix
9117 o Minor bugfixes (compilation):
9118 - Refrain from compiling unit testing related object files when
9119 --disable-unittests is set to configure script. Fixes bug 24891;
9120 bugfix on 0.2.5.1-alpha.
9121 - When linking the libtor_testing.a library, only include the
9122 dirauth object files once. Previously, they were getting added
9123 twice. Fixes bug 26402; bugfix on 0.3.4.1-alpha.
9124 - The --enable-fatal-warnings flag now affects Rust code as well.
9125 Closes ticket 26245.
9127 o Minor bugfixes (onion services):
9128 - Recompute some consensus information after detecting a clock jump,
9129 or after transitioning from a non-live consensus to a live
9130 consensus. We do this to avoid having an outdated state, and
9131 miscalculating the index for next-generation onion services. Fixes
9132 bug 24977; bugfix on 0.3.2.1-alpha.
9134 o Minor bugfixes (relay):
9135 - Relays now correctly block attempts to re-extend to the previous
9136 relay by Ed25519 identity. Previously they would warn in this
9137 case, but not actually reject the attempt. Fixes bug 26158; bugfix
9140 o Minor bugfixes (testing):
9141 - Fix compilation of the doctests in the Rust crypto crate. Fixes
9142 bug 26415; bugfix on 0.3.4.1-alpha.
9143 - Instead of trying to read the geoip configuration files from
9144 within the unit tests, instead create our own ersatz files with
9145 just enough geoip data in the format we expect. Trying to read
9146 from the source directory created problems on Windows with mingw,
9147 where the build system's paths are not the same as the platform's
9148 paths. Fixes bug 25787; bugfix on 0.3.4.1-alpha.
9149 - Refrain from trying to get an item from an empty smartlist in
9150 test_bridges_clear_bridge_list. Set DEBUG_SMARTLIST in unit tests
9151 to catch improper smartlist usage. Furthermore, enable
9152 DEBUG_SMARTLIST globally when build is configured with fragile
9153 hardening. Fixes bug 26196; bugfix on 0.3.4.1-alpha.
9156 Changes in version 0.3.3.7 - 2018-06-12
9157 Tor 0.3.3.7 backports several changes from the 0.3.4.x series, including
9158 fixes for bugs affecting compatibility and stability.
9160 o Directory authority changes:
9161 - Add an IPv6 address for the "dannenberg" directory authority.
9162 Closes ticket 26343.
9164 o Minor features (geoip):
9165 - Update geoip and geoip6 to the June 7 2018 Maxmind GeoLite2
9166 Country database. Closes ticket 26351.
9168 o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
9169 - Work around a change in OpenSSL 1.1.1 where return values that
9170 would previously indicate "no password" now indicate an empty
9171 password. Without this workaround, Tor instances running with
9172 OpenSSL 1.1.1 would accept descriptors that other Tor instances
9173 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
9175 o Minor bugfixes (compilation, backport from 0.3.4.2-alpha):
9176 - Silence unused-const-variable warnings in zstd.h with some GCC
9177 versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
9179 o Minor bugfixes (controller, backport from 0.3.4.2-alpha):
9180 - Improve accuracy of the BUILDTIMEOUT_SET control port event's
9181 TIMEOUT_RATE and CLOSE_RATE fields. (We were previously
9182 miscounting the total number of circuits for these field values.)
9183 Fixes bug 26121; bugfix on 0.3.3.1-alpha.
9185 o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
9186 - Prevent a possible out-of-bounds smartlist read in
9187 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
9189 o Minor bugfixes (path selection, backport from 0.3.4.1-alpha):
9190 - Only select relays when they have the descriptors we prefer to use
9191 for them. This change fixes a bug where we could select a relay
9192 because it had _some_ descriptor, but reject it later with a
9193 nonfatal assertion error because it didn't have the exact one we
9194 wanted. Fixes bugs 25691 and 25692; bugfix on 0.3.3.4-alpha.
9197 Changes in version 0.3.4.2-alpha - 2018-06-12
9198 Tor 0.3.4.2-alpha fixes several minor bugs in the previous alpha
9199 release, and forward-ports an authority-only security fix from 0.3.3.6.
9201 o Directory authority changes:
9202 - Add an IPv6 address for the "dannenberg" directory authority.
9203 Closes ticket 26343.
9205 o Major bugfixes (security, directory authority, denial-of-service, also in 0.3.3.6):
9206 - Fix a bug that could have allowed an attacker to force a directory
9207 authority to use up all its RAM by passing it a maliciously
9208 crafted protocol versions string. Fixes bug 25517; bugfix on
9209 0.2.9.4-alpha. This issue is also tracked as TROVE-2018-005.
9211 o Minor features (continuous integration):
9212 - Add the necessary configuration files for continuous integration
9213 testing on Windows, via the Appveyor platform. Closes ticket
9214 25549. Patches from Marcin Cieślak and Isis Lovecruft.
9216 o Minor features (geoip):
9217 - Update geoip and geoip6 to the June 7 2018 Maxmind GeoLite2
9218 Country database. Closes ticket 26351.
9220 o Minor bugfixes (compatibility, openssl):
9221 - Work around a change in OpenSSL 1.1.1 where return values that
9222 would previously indicate "no password" now indicate an empty
9223 password. Without this workaround, Tor instances running with
9224 OpenSSL 1.1.1 would accept descriptors that other Tor instances
9225 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
9227 o Minor bugfixes (compilation):
9228 - Silence unused-const-variable warnings in zstd.h with some GCC
9229 versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
9230 - Fix compilation when using OpenSSL 1.1.0 with the "no-deprecated"
9231 flag enabled. Fixes bug 26156; bugfix on 0.3.4.1-alpha.
9232 - Avoid a compiler warning when casting the return value of
9233 smartlist_len() to double with DEBUG_SMARTLIST enabled. Fixes bug
9234 26283; bugfix on 0.2.4.10-alpha.
9236 o Minor bugfixes (control port):
9237 - Do not count 0-length RELAY_COMMAND_DATA cells as valid data in
9238 CIRC_BW events. Previously, such cells were counted entirely in
9239 the OVERHEAD field. Now they are not. Fixes bug 26259; bugfix
9242 o Minor bugfixes (controller):
9243 - Improve accuracy of the BUILDTIMEOUT_SET control port event's
9244 TIMEOUT_RATE and CLOSE_RATE fields. (We were previously
9245 miscounting the total number of circuits for these field values.)
9246 Fixes bug 26121; bugfix on 0.3.3.1-alpha.
9248 o Minor bugfixes (hardening):
9249 - Prevent a possible out-of-bounds smartlist read in
9250 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
9252 o Minor bugfixes (onion services):
9253 - Fix a bug that blocked the creation of ephemeral v3 onion
9254 services. Fixes bug 25939; bugfix on 0.3.4.1-alpha.
9256 o Minor bugfixes (test coverage tools):
9257 - Update our "cov-diff" script to handle output from the latest
9258 version of gcov, and to remove extraneous timestamp information
9259 from its output. Fixes bugs 26101 and 26102; bugfix
9263 Changes in version 0.3.3.6 - 2018-05-22
9264 Tor 0.3.3.6 is the first stable release in the 0.3.3 series. It
9265 backports several important fixes from the 0.3.4.1-alpha.
9267 The Tor 0.3.3 series includes controller support and other
9268 improvements for v3 onion services, official support for embedding Tor
9269 within other applications, and our first non-trivial module written in
9270 the Rust programming language. (Rust is still not enabled by default
9271 when building Tor.) And as usual, there are numerous other smaller
9272 bugfixes, features, and improvements.
9274 Below are the changes since 0.3.3.5-rc. For a list of all changes
9275 since 0.3.2.10, see the ReleaseNotes file.
9277 o Major bugfixes (directory authorities, security, backport from 0.3.4.1-alpha):
9278 - When directory authorities read a zero-byte bandwidth file, they
9279 would previously log a warning with the contents of an
9280 uninitialised buffer. They now log a warning about the empty file
9281 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
9283 o Major bugfixes (security, directory authority, denial-of-service):
9284 - Fix a bug that could have allowed an attacker to force a directory
9285 authority to use up all its RAM by passing it a maliciously
9286 crafted protocol versions string. Fixes bug 25517; bugfix on
9287 0.2.9.4-alpha. This issue is also tracked as TROVE-2018-005.
9289 o Major bugfixes (crash, backport from 0.3.4.1-alpha):
9290 - Avoid a rare assertion failure in the circuit build timeout code
9291 if we fail to allow any circuits to actually complete. Fixes bug
9292 25733; bugfix on 0.2.2.2-alpha.
9294 o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
9295 - Avoid a crash when testing router reachability on a router that
9296 could have an ed25519 ID, but which does not. Fixes bug 25415;
9297 bugfix on 0.3.3.2-alpha.
9299 o Major bugfixes (onion service, backport from 0.3.4.1-alpha):
9300 - Correctly detect when onion services get disabled after HUP. Fixes
9301 bug 25761; bugfix on 0.3.2.1.
9303 o Major bugfixes (relay, denial of service, backport from 0.3.4.1-alpha):
9304 - Impose a limit on circuit cell queue size. The limit can be
9305 controlled by a consensus parameter. Fixes bug 25226; bugfix
9308 o Minor features (compatibility, backport from 0.3.4.1-alpha):
9309 - Avoid some compilation warnings with recent versions of LibreSSL.
9310 Closes ticket 26006.
9312 o Minor features (continuous integration, backport from 0.3.4.1-alpha):
9313 - Our .travis.yml configuration now includes support for testing the
9314 results of "make distcheck". (It's not uncommon for "make check"
9315 to pass but "make distcheck" to fail.) Closes ticket 25814.
9316 - Our Travis CI configuration now integrates with the Coveralls
9317 coverage analysis tool. Closes ticket 25818.
9319 o Minor features (geoip):
9320 - Update geoip and geoip6 to the May 1 2018 Maxmind GeoLite2 Country
9321 database. Closes ticket 26104.
9323 o Minor bugfixes (client, backport from 0.3.4.1-alpha):
9324 - Don't consider Tor running as a client if the ControlPort is open,
9325 but no actual client ports are open. Fixes bug 26062; bugfix
9328 o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
9329 - Upon receiving a malformed connected cell, stop processing the
9330 cell immediately. Previously we would mark the connection for
9331 close, but continue processing the cell as if the connection were
9332 open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
9334 o Minor bugfixes (documentation, backport from 0.3.4.1-alpha):
9335 - Stop saying in the manual that clients cache ipv4 dns answers from
9336 exit relays. We haven't used them since 0.2.6.3-alpha, and in
9337 ticket 24050 we stopped even caching them as of 0.3.2.6-alpha, but
9338 we forgot to say so in the man page. Fixes bug 26052; bugfix
9341 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
9342 - Allow the nanosleep() system call, which glibc uses to implement
9343 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
9345 o Minor bugfixes (onion service, backport from 0.3.4.1-alpha):
9346 - Fix a memory leak when a v3 onion service is configured and gets a
9347 SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
9348 - When parsing the descriptor signature, look for the token plus an
9349 extra white-space at the end. This is more correct but also will
9350 allow us to support new fields that might start with "signature".
9351 Fixes bug 26069; bugfix on 0.3.0.1-alpha.
9353 o Minor bugfixes (relay, crash, backport from 0.3.4.1-alpha):
9354 - Avoid a crash when running with DirPort set but ORPort turned off.
9355 Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
9357 o Documentation (backport from 0.3.4.1-alpha):
9358 - Correct an IPv6 error in the documentation for ExitPolicy. Closes
9359 ticket 25857. Patch from "CTassisF".
9362 Changes in version 0.3.4.1-alpha - 2018-05-17
9363 Tor 0.3.4.1-alpha is the first release in the 0.3.4.x series. It
9364 includes refactoring to begin reducing Tor's binary size and idle CPU
9365 usage on mobile, along with prep work for new bandwidth scanners,
9366 improvements to the experimental "vanguards" feature, and numerous
9367 other small features and bugfixes.
9369 o New system requirements:
9370 - Tor no longer tries to support old operating systems without
9371 mmap() or some local equivalent. Apparently, compilation on such
9372 systems has been broken for some time, without anybody noticing or
9373 complaining. Closes ticket 25398.
9375 o Major feature (directory authority, modularization):
9376 - The directory authority subsystem has been modularized. The code
9377 is now located in src/or/dirauth/, and is compiled in by default.
9378 To disable the module, the configure option
9379 --disable-module-dirauth has been added. This module may be
9380 disabled by default in some future release. Closes ticket 25610.
9382 o Major features (main loop, CPU usage):
9383 - When Tor is disabled (via DisableNetwork or via hibernation), it
9384 no longer needs to run any per-second events. This change should
9385 make it easier for mobile applications to disable Tor while the
9386 device is sleeping, or Tor is not running. Closes ticket 26063.
9387 - Tor no longer enables all of its periodic events by default.
9388 Previously, Tor would enable all possible main loop events,
9389 regardless of whether it needed them. Furthermore, many of these
9390 events are now disabled with Tor is hibernating or DisableNetwork
9391 is set. This is a big step towards reducing client CPU usage by
9392 reducing the amount of wake-ups the daemon does. Closes ticket
9394 - The bandwidth-limitation logic has been refactored so that
9395 bandwidth calculations are performed on-demand, rather than every
9396 TokenBucketRefillInterval milliseconds. This change should improve
9397 the granularity of our bandwidth calculations, and limit the
9398 number of times that the Tor process needs to wake up when it is
9399 idle. Closes ticket 25373.
9400 - Move responsibility for many operations from a once-per-second
9401 callback to a callback that is only scheduled as needed. Moving
9402 this functionality has allowed us to disable the callback when
9403 Tor's network is disabled. Once enough items are removed from our
9404 once-per-second callback, we can eliminate it entirely to conserve
9405 CPU when idle. The functionality removed includes: closing
9406 connections, circuits, and channels (ticket 25932); consensus
9407 voting (25937); flushing log callbacks (25951); honoring delayed
9408 SIGNEWNYM requests (25949); rescanning the consensus cache
9409 (25931); saving the state file to disk (25948); warning relay
9410 operators about unreachable ports (25952); and keeping track of
9411 Tor's uptime (26009).
9413 o Major bugfixes (directory authorities, security):
9414 - When directory authorities read a zero-byte bandwidth file, they
9415 would previously log a warning with the contents of an
9416 uninitialised buffer. They now log a warning about the empty file
9417 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
9419 o Major bugfixes (crash):
9420 - Avoid a rare assertion failure in the circuit build timeout code
9421 if we fail to allow any circuits to actually complete. Fixes bug
9422 25733; bugfix on 0.2.2.2-alpha.
9424 o Major bugfixes (directory authority):
9425 - Avoid a crash when testing router reachability on a router that
9426 could have an ed25519 ID, but which does not. Fixes bug 25415;
9427 bugfix on 0.3.3.2-alpha.
9429 o Major bugfixes (onion service):
9430 - Correctly detect when onion services get disabled after HUP. Fixes
9431 bug 25761; bugfix on 0.3.2.1.
9433 o Major bugfixes (protover, voting):
9434 - Revise Rust implementation of protover to use a more memory-
9435 efficient voting algorithm and corresponding data structures, thus
9436 avoiding a potential (but small impact) DoS attack where specially
9437 crafted protocol strings would expand to several potential
9438 megabytes in memory. In the process, several portions of code were
9439 revised to be methods on new, custom types, rather than functions
9440 taking interchangeable types, thus increasing type safety of the
9441 module. Custom error types and handling were added as well, in
9442 order to facilitate better error dismissal/handling in outside
9443 crates and avoid mistakenly passing an internal error string to C
9444 over the FFI boundary. Many tests were added, and some previous
9445 differences between the C and Rust implementations have been
9446 remedied. Fixes bug 24031; bugfix on 0.3.3.1-alpha.
9448 o Major bugfixes (relay, denial of service):
9449 - Impose a limit on circuit cell queue size. The limit can be
9450 controlled by a consensus parameter. Fixes bug 25226; bugfix
9453 o Minor features (accounting):
9454 - When Tor becomes dormant, it now uses a scheduled event to wake up
9455 at the right time. Previously, we would use the per-second timer
9456 to check whether to wake up, but we no longer have any per-second
9457 timers enabled when the network is disabled. Closes ticket 26064.
9459 o Minor features (code quality):
9460 - Add optional spell-checking for the Tor codebase, using the
9461 "misspell" program. To use this feature, run "make check-typos".
9462 Closes ticket 25024.
9464 o Minor features (compatibility):
9465 - Tor now detects versions of OpenSSL 1.1.0 and later compiled with
9466 the no-deprecated option, and builds correctly with them. Closes
9467 tickets 19429, 19981, and 25353.
9468 - Avoid some compilation warnings with recent versions of LibreSSL.
9469 Closes ticket 26006.
9471 o Minor features (compression, zstd):
9472 - When running with zstd, Tor now considers using advanced functions
9473 that the zstd maintainers have labeled as potentially unstable. To
9474 prevent breakage, Tor will only use this functionality when the
9475 runtime version of the zstd library matches the version with which
9476 Tor was compiled. Closes ticket 25162.
9478 o Minor features (configuration):
9479 - The "DownloadSchedule" options have been renamed to end with
9480 "DownloadInitialDelay". The old names are still allowed, but will
9481 produce a warning. Comma-separated lists are still permitted for
9482 these options, but all values after the first are ignored (as they
9483 have been since 0.2.9). Closes ticket 23354.
9485 o Minor features (continuous integration):
9486 - Our .travis.yml configuration now includes support for testing the
9487 results of "make distcheck". (It's not uncommon for "make check"
9488 to pass but "make distcheck" to fail.) Closes ticket 25814.
9489 - Our Travis CI configuration now integrates with the Coveralls
9490 coverage analysis tool. Closes ticket 25818.
9492 o Minor features (control port):
9493 - Introduce GETINFO "current-time/{local,utc}" to return the local
9494 and UTC times respectively in ISO format. This helps a controller
9495 like Tor Browser detect a time-related error. Closes ticket 25511.
9496 Patch by Neel Chauhan.
9497 - Introduce new fields to the CIRC_BW event. There are two new
9498 fields in each of the read and written directions. The DELIVERED
9499 fields report the total valid data on the circuit, as measured by
9500 the payload sizes of verified and error-checked relay command
9501 cells. The OVERHEAD fields report the total unused bytes in each
9502 of these cells. Closes ticket 25903.
9504 o Minor features (directory authority):
9505 - Directory authorities now open their key-pinning files as O_SYNC,
9506 to limit their chances of accidentally writing partial lines.
9507 Closes ticket 23909.
9509 o Minor features (directory authority, forward compatibility):
9510 - Make the lines of the measured bandwidth file able to contain
9511 their entries in any order. Previously, the node_id entry needed
9512 to come first. Closes ticket 26004.
9514 o Minor features (entry guards):
9515 - Introduce a new torrc option NumPrimaryGuards for controlling the
9516 number of primary guards. Closes ticket 25843.
9518 o Minor features (geoip):
9519 - Update geoip and geoip6 to the May 1 2018 Maxmind GeoLite2 Country
9520 database. Closes ticket 26104.
9522 o Minor features (performance):
9523 - Avoid a needless call to malloc() when processing an incoming
9524 relay cell. Closes ticket 24914.
9525 - Make our timing-wheel code run a tiny bit faster on 32-bit
9526 platforms, by preferring 32-bit math to 64-bit. Closes
9528 - Avoid a needless malloc()/free() pair every time we handle an ntor
9529 handshake. Closes ticket 25150.
9531 o Minor features (testing):
9532 - Add a unit test for voting_schedule_get_start_of_next_interval().
9533 Closes ticket 26014, and helps make unit test coverage
9535 - A new unittests module specifically for testing the functions in
9536 the (new-ish) bridges.c module has been created with new
9537 unittests, raising the code coverage percentages. Closes 25425.
9538 - We now have improved testing for addressmap_get_virtual_address()
9539 function. This should improve our test coverage, and make our test
9540 coverage more deterministic. Closes ticket 25993.
9542 o Minor features (timekeeping, circuit scheduling):
9543 - When keeping track of how busy each circuit have been recently on
9544 a given connection, use coarse-grained monotonic timers rather
9545 than gettimeofday(). This change should marginally increase
9546 accuracy and performance. Implements part of ticket 25927.
9548 o Minor bugfixes (bandwidth management):
9549 - Consider ourselves "low on write bandwidth" if we have exhausted
9550 our write bandwidth some time in the last second. This was the
9551 documented behavior before, but the actual behavior was to change
9552 this value every TokenBucketRefillInterval. Fixes bug 25828;
9553 bugfix on 0.2.3.5-alpha.
9555 o Minor bugfixes (C correctness):
9556 - Add a missing lock acquisition in the shutdown code of the control
9557 subsystem. Fixes bug 25675; bugfix on 0.2.7.3-rc. Found by
9558 Coverity; this is CID 1433643.
9560 o Minor bugfixes (circuit path selection):
9561 - Don't count path selection failures as circuit build failures.
9562 This change should eliminate cases where Tor blames its guard or
9563 the network for situations like insufficient microdescriptors
9564 and/or overly restrictive torrc settings. Fixes bug 25705; bugfix
9567 o Minor bugfixes (client):
9568 - Don't consider Tor running as a client if the ControlPort is open,
9569 but no actual client ports are open. Fixes bug 26062; bugfix
9572 o Minor bugfixes (code style):
9573 - Fixed multiple includes of transports.h in src/or/connection.c
9574 Fixes bug 25261; bugfix on 0.2.5.1-alpha.
9575 - Remove the unused variable n_possible from the function
9576 channel_get_for_extend(). Fixes bug 25645; bugfix on 0.2.4.4-alpha
9578 o Minor bugfixes (control interface):
9579 - Respond with more human-readable error messages to GETINFO exit-
9580 policy/* requests. Also, let controller know if an error is
9581 transient (response code 551) or not (response code 552). Fixes
9582 bug 25852; bugfix on 0.2.8.1-alpha.
9584 o Minor bugfixes (controller):
9585 - Make CIRC_BW event reflect the total of all data sent on a
9586 circuit, including padding and dropped cells. Also fix a mis-
9587 counting bug when STREAM_BW events were enabled. Fixes bug 25400;
9588 bugfix on 0.2.5.2-alpha.
9590 o Minor bugfixes (correctness, client):
9591 - Upon receiving a malformed connected cell, stop processing the cell
9592 immediately. Previously we would mark the connection for close, but
9593 continue processing the cell as if the connection were open. Fixes bug
9594 26072; bugfix on 0.2.4.7-alpha.
9596 o Minor bugfixes (directory client):
9597 - When unverified-consensus is verified, rename it to cached-
9598 consenus. Fixes bug 4187; bugfix on 0.2.0.3-alpha.
9599 - Fixed launching a certificate fetch always during the scheduled
9600 periodic consensus fetch by fetching only in those cases when
9601 consensus are waiting for certs. Fixes bug 24740; bugfix
9604 o Minor bugfixes (documentation):
9605 - Stop saying in the manual that clients cache ipv4 dns answers from
9606 exit relays. We haven't used them since 0.2.6.3-alpha, and in
9607 ticket 24050 we stopped even caching them as of 0.3.2.6-alpha, but
9608 we forgot to say so in the man page. Fixes bug 26052; bugfix
9611 o Minor bugfixes (error reporting):
9612 - Improve tolerance for directory authorities with skewed clocks.
9613 Previously, an authority with a clock more than 60 seconds ahead
9614 could cause a client with a correct clock to warn that the
9615 client's clock was behind. Now the clocks of a majority of
9616 directory authorities have to be ahead of the client before this
9617 warning will occur. Fixes bug 25756; bugfix on 0.2.2.25-alpha.
9619 o Minor bugfixes (Linux seccomp2 sandbox):
9620 - Allow the nanosleep() system call, which glibc uses to implement
9621 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
9623 o Minor bugfixes (onion service):
9624 - Fix a memory leak when a v3 onion service is configured and gets a
9625 SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
9626 - When parsing the descriptor signature, look for the token plus an
9627 extra white-space at the end. This is more correct but also will
9628 allow us to support new fields that might start with "signature".
9629 Fixes bug 26069; bugfix on 0.3.0.1-alpha.
9631 o Minor bugfixes (path selection):
9632 - Only select relays when they have the descriptors we prefer to use
9633 for them. This change fixes a bug where we could select a relay
9634 because it had _some_ descriptor, but reject it later with a
9635 nonfatal assertion error because it didn't have the exact one we
9636 wanted. Fixes bugs 25691 and 25692; bugfix on 0.3.3.4-alpha.
9638 o Minor bugfixes (portability):
9639 - Do not align mmap length, as it is not required by POSIX, and the
9640 getpagesize function is deprecated. Fixes bug 25399; bugfix
9643 o Minor bugfixes (portability, FreeBSD):
9644 - In have_enough_mem_for_dircache(), the variable DIRCACHE_MIN_MEM_MB
9645 does not stringify on FreeBSD, so we switch to tor_asprintf().
9646 Fixes bug 20887; bugfix on 0.2.8.1-alpha. Patch by Neel Chauhan.
9648 o Minor bugfixes (relay statistics):
9649 - When a relay is collecting internal statistics about how many
9650 create cell requests it has seen of each type, accurately count
9651 the requests from relays that temporarily fall out of the
9652 consensus. (To be extra conservative, we were already ignoring
9653 requests from clients in our counts, and we continue ignoring them
9654 here.) Fixes bug 24910; bugfix on 0.2.4.17-rc.
9656 o Minor bugfixes (relay, crash):
9657 - Avoid a crash when running with DirPort set but ORPort turned off.
9658 Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
9660 o Minor bugfixes (restart-in-process):
9661 - When shutting down, Tor now clears all the flags in the control.c
9662 module. This should prevent a bug where authentication cookies are
9663 not generated on restart. Fixes bug 25512; bugfix on 0.3.3.1-alpha.
9665 o Minor bugfixes (testing):
9666 - When testing workqueue event-cancellation, make sure that we
9667 actually cancel an event, and that cancel each event with equal
9668 probability. (It was previously possible, though extremely
9669 unlikely, for our event-canceling test not to cancel any events.)
9670 Fixes bug 26008; bugfix on 0.2.6.3-alpha.
9671 - Repeat part of the test in test_client_pick_intro() a number of
9672 times, to give it consistent coverage. Fixes bug 25996; bugfix
9674 - Remove randomness from the hs_common/responsible_hsdirs test, so
9675 that it always takes the same path through the function it tests.
9676 Fixes bug 25997; bugfix on 0.3.2.1-alpha.
9677 - Change the behavior of the "channel/outbound" test so that it
9678 never causes a 10-second rollover for the EWMA circuitmux code.
9679 Previously, this behavior would happen randomly, and result in
9680 fluctuating test coverage. Fixes bug 25994; bugfix
9682 - Use X509_new() to allocate certificates that will be freed later
9683 with X509_free(). Previously, some parts of the unit tests had
9684 used tor_malloc_zero(), which is incorrect, and which caused test
9685 failures on Windows when they were built with extra hardening.
9686 Fixes bugs 25943 and 25944; bugfix on 0.2.8.1-alpha. Patch by
9688 - While running the circuit_timeout test, fix the PRNG to a
9689 deterministic AES stream, so that the test coverage from this test
9690 will itself be deterministic. Fixes bug 25995; bugfix
9693 o Minor bugfixes (vanguards):
9694 - Allow the last hop in a vanguard circuit to be the same as our
9695 first, to prevent the adversary from influencing guard node choice
9696 by choice of last hop. Also prevent the creation of A - B - A
9697 paths, or A - A paths, which are forbidden by relays. Fixes bug
9698 25870; bugfix on 0.3.3.1-alpha.
9700 o Code simplification and refactoring:
9701 - Remove duplicate code in parse_{c,s}method_line and bootstrap
9702 their functionalities into a single function. Fixes bug 6236;
9703 bugfix on 0.2.3.6-alpha.
9704 - We remove the PortForwarding and PortForwardingHelper options,
9705 related functions, and the port_forwarding tests. These options
9706 were used by the now-deprecated Vidalia to help ordinary users
9707 become Tor relays or bridges. Closes ticket 25409. Patch by
9709 - In order to make the OR and dir checking function in router.c less
9710 confusing we renamed some functions and
9711 consider_testing_reachability() has been split into
9712 router_should_check_reachability() and
9713 router_do_reachability_checks(). Also we improved the documentation
9714 in some functions. Closes ticket 18918.
9715 - Initial work to isolate Libevent usage to a handful of modules in
9716 our codebase, to simplify our call structure, and so that we can
9717 more easily change event loops in the future if needed. Closes
9719 - Introduce a function to call getsockname() and return tor_addr_t,
9720 to save a little complexity throughout the codebase. Closes
9722 - Make hsdir_index in node_t a hsdir_index_t rather than a pointer
9723 as hsdir_index is always present. Also, we move hsdir_index_t into
9724 or.h. Closes ticket 23094. Patch by Neel Chauhan.
9725 - Merge functions used for describing nodes and suppress the
9726 functions that do not allocate memory for the output buffer
9727 string. NODE_DESC_BUF_LEN constant and format_node_description()
9728 function cannot be used externally from router.c module anymore.
9729 Closes ticket 25432. Patch by valentecaio.
9730 - Our main loop has been simplified so that all important operations
9731 happen inside events. Previously, some operations had to happen
9732 outside the event loop, to prevent infinite sequences of event
9733 activations. Closes ticket 25374.
9734 - Put a SHA1 public key digest in hs_service_intro_point_t, and use
9735 it in register_intro_circ() and service_intro_point_new(). This
9736 prevents the digest from being re-calculated each time. Closes
9737 ticket 23107. Patch by Neel Chauhan.
9738 - Refactor token-bucket implementations to use a common backend.
9739 Closes ticket 25766.
9740 - Remove extern declaration of stats_n_seconds_working variable from
9741 main, protecting its accesses with get_uptime() and reset_uptime()
9742 functions. Closes ticket 25081, patch by “valentecaio”.
9743 - Remove our previous logic for "cached gettimeofday()" -- our
9744 coarse monotonic timers are fast enough for this purpose, and far
9745 less error-prone. Implements part of ticket 25927.
9746 - Remove the return value for fascist_firewall_choose_address_base(),
9747 and sister functions such as fascist_firewall_choose_address_node()
9748 and fascist_firewall_choose_address_rs(). Also, while we're here,
9749 initialize the ap argument as leaving it uninitialized can pose a
9750 security hazard. Closes ticket 24734. Patch by Neel Chauhan.
9751 - Rename two fields of connection_t struct. timestamp_lastwritten is
9752 renamed to timestamp_last_write_allowed and timestamp_lastread is
9753 renamed to timestamp_last_read_allowed. Closes ticket 24714, patch
9755 - Since Tor requires C99, remove our old workaround code for libc
9756 implementations where free(NULL) doesn't work. Closes ticket 24484.
9757 - Use our standard rate-limiting code to deal with excessive
9758 libevent failures, rather than the hand-rolled logic we had
9759 before. Closes ticket 26016.
9760 - We remove the return value of node_get_prim_orport() and
9761 node_get_prim_dirport(), and introduce node_get_prim_orport() in
9762 node_ipv6_or_preferred() and node_ipv6_dir_preferred() in order to
9763 check for a null address. Closes ticket 23873. Patch by
9765 - We switch to should_record_bridge_info() in
9766 geoip_note_client_seen() and options_need_geoip_info() instead of
9767 accessing the configuration values directly. Fixes bug 25290;
9768 bugfix on 0.2.1.6-alpha. Patch by Neel Chauhan.
9770 o Deprecated features:
9771 - As we are not recommending 0.2.5 anymore, we require relays that
9772 once had an ed25519 key associated with their RSA key to always
9773 have that key, instead of allowing them to drop back to a version
9774 that didn't support ed25519. This means they need to use a new RSA
9775 key if they want to downgrade to an older version of tor without
9776 ed25519. Closes ticket 20522.
9779 - Correct an IPv6 error in the documentation for ExitPolicy. Closes
9780 ticket 25857. Patch from "CTassisF".
9783 - Directory authorities will no longer support voting according to
9784 any consensus method before consensus method 25. This keeps
9785 authorities compatible with all authorities running 0.2.9.8 and
9786 later, and does not break any clients or relays. Implements ticket
9787 24378 and proposal 290.
9788 - The PortForwarding and PortForwardingHelper features have been
9789 removed. The reasoning is, given that implementations of NAT
9790 traversal protocols within common consumer grade routers are
9791 frequently buggy, and that the target audience for a NAT punching
9792 feature is a perhaps less-technically-inclined relay operator,
9793 when the helper fails to setup traversal the problems are usually
9794 deep, ugly, and very router specific, making them horrendously
9795 impossible for technical support to reliable assist with, and thus
9796 resulting in frustration all around. Unfortunately, relay
9797 operators who would like to run relays behind NATs will need to
9798 become more familiar with the port forwarding configurations on
9799 their local router. Closes 25409.
9800 - The TestingEnableTbEmptyEvent option has been removed. It was used
9801 in testing simulations to measure how often connection buckets
9802 were emptied, in order to improve our scheduling, but it has not
9803 been actively used in years. Closes ticket 25760.
9804 - The old "round-robin" circuit multiplexer (circuitmux)
9805 implementation has been removed, along with a fairly large set of
9806 code that existed to support it. It has not been the default
9807 circuitmux since we introduced the "EWMA" circuitmux in 0.2.4.x,
9808 but it still required an unreasonable amount of memory and CPU.
9809 Closes ticket 25268.
9812 Changes in version 0.3.3.5-rc - 2018-04-15
9813 Tor 0.3.3.5-rc fixes various bugs in earlier versions of Tor,
9814 including some that could affect reliability or correctness.
9816 This is the first release candidate in the 0.3.3 series. If we find no
9817 new bugs or regression here, then the first stable 0.3.3 release will
9818 be nearly identical to this one.
9820 o Major bugfixes (security, protover, voting):
9821 - Revise Rust implementation of protover to use a more memory-
9822 efficient voting algorithm and corresponding data structures, thus
9823 avoiding a potential memory-based DoS attack where specially
9824 crafted protocol strings would expand to fill available memory.
9825 Fixes bug 24031; bugfix on 0.3.3.1-alpha.
9827 o Major bugfixes (performance, load balancing):
9828 - Directory authorities no longer vote in favor of the Guard flag
9829 for relays without directory support. Starting in Tor
9830 0.3.0.1-alpha, clients have been avoiding using such relays in the
9831 Guard position, leading to increasingly broken load balancing for
9832 the 5%-or-so of Guards that don't advertise directory support.
9833 Fixes bug 22310; bugfix on 0.3.0.6.
9835 o Minor feature (continuous integration):
9836 - Update the Travis CI configuration to use the stable Rust channel,
9837 now that we have decided to require that. Closes ticket 25714.
9839 o Minor features (config options):
9840 - Change the way the default value for MaxMemInQueues is calculated.
9841 We now use 40% of the hardware RAM if the system has 8 GB RAM or
9842 more. Otherwise we use the former value of 75%. Closes
9845 o Minor features (geoip):
9846 - Update geoip and geoip6 to the April 3 2018 Maxmind GeoLite2
9847 Country database. Closes ticket 25718.
9849 o Minor bugfixes (client):
9850 - When using a listed relay as a bridge, and also using
9851 microdescriptors, and considering that relay as a non-bridge in a
9852 circuit, treat its microdescriptor as a valid source of
9853 information about that relay. This change should prevent a non-
9854 fatal assertion error. Fixes bug 25691; bugfix on 0.3.3.4-alpha.
9856 o Minor bugfixes (controller):
9857 - Restore the correct operation of the RESOLVE command, which had
9858 been broken since we added the ability to enable/disable DNS on
9859 specific listener ports. Fixes bug 25617; bugfix on 0.2.9.3-alpha.
9861 o Minor bugfixes (distribution, compilation, rust):
9862 - Build correctly when the rust dependencies submodule is loaded,
9863 but the TOR_RUST_DEPENDENCIES environment variable is not set.
9864 Fixes bug 25679; bugfix on 0.3.3.1-alpha.
9865 - Actually include all of our Rust source in our source
9866 distributions. (Previously, a few of the files were accidentally
9867 omitted.) Fixes bug 25732; bugfix on 0.3.3.2-alpha.
9869 o Minor bugfixes (documentation):
9870 - Document that the PerConnBW{Rate,Burst} options will fall back to
9871 their corresponding consensus parameters only if those parameters
9872 are set. Previously we had claimed that these values would always
9873 be set in the consensus. Fixes bug 25296; bugfix on 0.2.2.7-alpha.
9874 - Revert a misformatting issue in the ExitPolicy documentation.
9875 Fixes bug 25582; bugfix on 0.3.3.1-alpha.
9877 o Minor bugfixes (exit relay DNS retries):
9878 - Re-attempt timed-out DNS queries 3 times before failure, since our
9879 timeout is 5 seconds for them, but clients wait 10-15. Also allow
9880 slightly more timeouts per resolver when an exit has multiple
9881 resolvers configured. Fixes bug 21394; bugfix on 0.3.1.9.
9883 o Minor bugfixes (onion services):
9884 - Re-instate counting the client HSDir fetch circuits against the
9885 MaxClientCircuitsPending rate limit. Fixes bug 24989; bugfix
9887 - Remove underscores from the _HSLayer{2,3}Nodes options. This
9888 expert-user configuration can now be enabled as HSLayer{2,3}Nodes.
9889 Fixes bug 25581; bugfix on 0.3.3.1-alpha
9891 o Code simplification and refactoring:
9892 - Move the list of default directory authorities to its own file.
9893 Closes ticket 24854. Patch by "beastr0".
9895 o Documentation (manpage, denial of service):
9896 - Provide more detail about the denial-of-service options, by
9897 listing each mitigation and explaining how they relate. Closes
9901 Changes in version 0.3.3.4-alpha - 2018-03-29
9902 Tor 0.3.3.4-alpha includes various bugfixes for issues found during
9903 the alpha testing of earlier releases in its series. We are
9904 approaching a stable 0.3.3.4-alpha release: more testing is welcome!
9906 o New system requirements:
9907 - When built with Rust, Tor now depends on version 0.2.39 of the
9908 libc crate. Closes tickets 25310 and 25664.
9910 o Major bugfixes (relay, connection):
9911 - If we have failed to connect to a relay and received a connection
9912 refused, timeout, or similar error (at the TCP level), do not try
9913 that same address/port again for 60 seconds after the failure has
9914 occurred. Fixes bug 24767; bugfix on 0.0.6.
9916 o Minor features (geoip):
9917 - Update geoip and geoip6 to the March 8 2018 Maxmind GeoLite2
9918 Country database. Closes ticket 25469.
9920 o Minor features (log messages):
9921 - Improve log message in the out-of-memory handler to include
9922 information about memory usage from the different compression
9923 backends. Closes ticket 25372.
9925 o Minor features (sandbox):
9926 - Explicitly permit the poll() system call when the Linux
9927 seccomp2-based sandbox is enabled: apparently, some versions of
9928 libc use poll() when calling getpwnam(). Closes ticket 25313.
9930 o Minor bugfixes (C correctness):
9931 - Fix a very unlikely (impossible, we believe) null pointer
9932 dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
9933 Coverity; this is CID 1430932.
9935 o Minor bugfixes (channel, client):
9936 - Better identify client connection when reporting to the geoip
9937 client cache. Fixes bug 24904; bugfix on 0.3.1.7.
9939 o Minor bugfixes (compilation):
9940 - Fix a C99 compliance issue in our configuration script that caused
9941 compilation issues when compiling Tor with certain versions of
9942 xtools. Fixes bug 25474; bugfix on 0.3.2.5-alpha.
9944 o Minor bugfixes (controller, reliability):
9945 - Avoid a (nonfatal) assertion failure when extending a one-hop
9946 circuit from the controller to become a multihop circuit. Fixes
9947 bug 24903; bugfix on 0.2.5.2-alpha.
9949 o Major bugfixes (networking):
9950 - Tor will no longer reject IPv6 address strings from Tor Browser
9951 when they are passed as hostnames in SOCKS5 requests. Fixes bug
9952 25036, bugfix on Tor 0.3.1.2.
9954 o Minor bugfixes (networking):
9955 - string_is_valid_hostname() will not consider IP strings to be
9956 valid hostnames. Fixes bug 25055; bugfix on Tor 0.2.5.5.
9958 o Minor bugfixes (onion service v3):
9959 - Avoid an assertion failure when the next onion service
9960 descriptor rotation type is out of sync with the consensus's
9961 valid-after time. Instead, log a warning message with extra
9962 information, so we can better hunt down the cause of this
9963 assertion. Fixes bug 25306; bugfix on 0.3.2.1-alpha.
9965 o Minor bugfixes (testing):
9966 - Avoid intermittent test failures due to a test that had relied on
9967 onion service introduction point creation finishing within 5
9968 seconds of real clock time. Fixes bug 25450; bugfix
9970 - Rust crates are now automatically detected and tested. Previously,
9971 some crates were not tested by `make test-rust` due to a static
9972 string in the `src/test/test_rust.sh` script specifying which
9973 crates to test. Fixes bug 25560; bugfix on 0.3.3.3-alpha.
9975 o Minor bugfixes (testing, benchmarks):
9976 - Fix a crash when running benchmark tests on win32 systems. The
9977 crash was due to a mutex that wasn't initialized before logging
9978 and options were initialized. Fixes bug 25479; bugfix
9981 o Minor bugfixes (warnings, ipv6):
9982 - Avoid a bug warning that could occur when trying to connect to a
9983 relay over IPv6. This warning would occur on a Tor instance that
9984 downloads router descriptors, but prefers to use microdescriptors.
9985 Fixes bug 25213; bugfix on 0.3.3.1-alpha.
9987 o Code simplification and refactoring:
9988 - Remove the old (deterministic) directory retry logic entirely:
9989 We've used exponential backoff exclusively for some time. Closes
9993 - Improved the documentation of AccountingStart parameter. Closes
9995 - Update the documentation for "Log" to include the current list of
9996 logging domains. Closes ticket 25378.
9999 Changes in version 0.3.1.10 - 2018-03-03
10000 Tor 0.3.1.10 backports a number of bugfixes, including important fixes for
10003 It includes an important security fix for a remote crash attack
10004 against directory authorities, tracked as TROVE-2018-001.
10006 This release also backports our new system for improved resistance to
10007 denial-of-service attacks against relays.
10009 This release also fixes several minor bugs and annoyances from
10012 All directory authorities should upgrade to one of the versions
10013 released today. Relays running 0.3.1.x may wish to update to one of
10014 the versions released today, for the DoS mitigations.
10016 Please note: according to our release calendar, Tor 0.3.1 will no
10017 longer be supported after 1 July 2018. If you will be running Tor
10018 after that date, you should make sure to plan to upgrade to the latest
10019 stable version, or downgrade to 0.2.9 (which will receive long-term
10022 o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
10023 - Fix a protocol-list handling bug that could be used to remotely crash
10024 directory authorities with a null-pointer exception. Fixes bug 25074;
10025 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
10028 o Major features (denial-of-service mitigation, backport from 0.3.3.2-alpha):
10029 - Give relays some defenses against the recent network overload. We
10030 start with three defenses (default parameters in parentheses).
10031 First: if a single client address makes too many concurrent
10032 connections (>100), hang up on further connections. Second: if a
10033 single client address makes circuits too quickly (more than 3 per
10034 second, with an allowed burst of 90) while also having too many
10035 connections open (3), refuse new create cells for the next while
10036 (1-2 hours). Third: if a client asks to establish a rendezvous
10037 point to you directly, ignore the request. These defenses can be
10038 manually controlled by new torrc options, but relays will also
10039 take guidance from consensus parameters, so there's no need to
10040 configure anything manually. Implements ticket 24902.
10042 o Minor features (linux seccomp2 sandbox, backport from 0.3.2.5-alpha):
10043 - Update the sandbox rules so that they should now work correctly
10044 with Glibc 2.26. Closes ticket 24315.
10046 o Major bugfixes (onion services, retry behavior, backport from 0.3.3.1-alpha):
10047 - Fix an "off by 2" error in counting rendezvous failures on the
10048 onion service side. While we thought we would stop the rendezvous
10049 attempt after one failed circuit, we were actually making three
10050 circuit attempts before giving up. Now switch to a default of 2,
10051 and allow the consensus parameter "hs_service_max_rdv_failures" to
10052 override. Fixes bug 24895; bugfix on 0.0.6.
10054 o Major bugfixes (protocol versions, backport from 0.3.3.2-alpha):
10055 - Add Link protocol version 5 to the supported protocols list. Fixes
10056 bug 25070; bugfix on 0.3.1.1-alpha.
10058 o Major bugfixes (relay, backport from 0.3.3.1-alpha):
10059 - Fix a set of false positives where relays would consider
10060 connections to other relays as being client-only connections (and
10061 thus e.g. deserving different link padding schemes) if those
10062 relays fell out of the consensus briefly. Now we look only at the
10063 initial handshake and whether the connection authenticated as a
10064 relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
10066 o Minor features (denial-of-service avoidance, backport from 0.3.3.2-alpha):
10067 - Make our OOM handler aware of the geoip client history cache so it
10068 doesn't fill up the memory. This check is important for IPv6 and
10069 our DoS mitigation subsystem. Closes ticket 25122.
10071 o Minor feature (relay statistics, backport from 0.3.2.6-alpha):
10072 - Change relay bandwidth reporting stats interval from 4 hours to 24
10073 hours in order to reduce the efficiency of guard discovery
10074 attacks. Fixes ticket 23856.
10076 o Minor features (compatibility, OpenSSL, backport from 0.3.3.3-alpha):
10077 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
10078 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
10079 since they neither disabled TLS 1.3 nor enabled any of the
10080 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
10081 Closes ticket 24978.
10083 o Minor features (fallback directory mirrors, backport from 0.3.2.9):
10084 - The fallback directory list has been re-generated based on the
10085 current status of the network. Tor uses fallback directories to
10086 bootstrap when it doesn't yet have up-to-date directory
10087 information. Closes ticket 24801.
10088 - Make the default DirAuthorityFallbackRate 0.1, so that clients
10089 prefer to bootstrap from fallback directory mirrors. This is a
10090 follow-up to 24679, which removed weights from the default
10091 fallbacks. Implements ticket 24681.
10093 o Minor features (geoip):
10094 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
10097 o Minor bugfix (channel connection, backport from 0.3.3.2-alpha):
10098 - Use the actual observed address of an incoming relay connection,
10099 not the canonical address of the relay from its descriptor, when
10100 making decisions about how to handle the incoming connection.
10101 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
10103 o Minor bugfix (directory authority, backport from 0.3.3.2-alpha):
10104 - Directory authorities, when refusing a descriptor from a rejected
10105 relay, now explicitly tell the relay (in its logs) to set a valid
10106 ContactInfo address and contact the bad-relays@ mailing list.
10107 Fixes bug 25170; bugfix on 0.2.9.1.
10109 o Minor bugfixes (address selection, backport from 0.3.2.9):
10110 - When the fascist_firewall_choose_address_ functions don't find a
10111 reachable address, set the returned address to the null address
10112 and port. This is a precautionary measure, because some callers do
10113 not check the return value. Fixes bug 24736; bugfix
10116 o Major bugfixes (bootstrapping, backport from 0.3.2.5-alpha):
10117 - Fetch descriptors aggressively whenever we lack enough to build
10118 circuits, regardless of how many descriptors we are missing.
10119 Previously, we would delay launching the fetch when we had fewer
10120 than 15 missing descriptors, even if some of those descriptors
10121 were blocking circuits from building. Fixes bug 23985; bugfix on
10122 0.1.1.11-alpha. The effects of this bug became worse in
10123 0.3.0.3-alpha, when we began treating missing descriptors from our
10124 primary guards as a reason to delay circuits.
10125 - Don't try fetching microdescriptors from relays that have failed
10126 to deliver them in the past. Fixes bug 23817; bugfix
10129 o Minor bugfixes (compilation, backport from 0.3.2.7-rc):
10130 - Fix a signed/unsigned comparison warning introduced by our fix to
10131 TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
10133 o Minor bugfixes (control port, linux seccomp2 sandbox, backport from 0.3.2.5-alpha):
10134 - Avoid a crash when attempting to use the seccomp2 sandbox together
10135 with the OwningControllerProcess feature. Fixes bug 24198; bugfix
10138 o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
10139 - Fix a possible crash on malformed consensus. If a consensus had
10140 contained an unparseable protocol line, it could have made clients
10141 and relays crash with a null-pointer exception. To exploit this
10142 issue, however, an attacker would need to be able to subvert the
10143 directory authority system. Fixes bug 25251; bugfix on
10144 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
10146 o Minor bugfixes (directory cache, backport from 0.3.2.5-alpha):
10147 - Recover better from empty or corrupt files in the consensus cache
10148 directory. Fixes bug 24099; bugfix on 0.3.1.1-alpha.
10149 - When a consensus diff calculation is only partially successful,
10150 only record the successful parts as having succeeded. Partial
10151 success can happen if (for example) one compression method fails
10152 but the others succeed. Previously we misrecorded all the
10153 calculations as having succeeded, which would later cause a
10154 nonfatal assertion failure. Fixes bug 24086; bugfix
10157 o Minor bugfixes (entry guards, backport from 0.3.2.3-alpha):
10158 - Tor now updates its guard state when it reads a consensus
10159 regardless of whether it's missing descriptors. That makes tor use
10160 its primary guards to fetch descriptors in some edge cases where
10161 it would previously have used fallback directories. Fixes bug
10162 23862; bugfix on 0.3.0.1-alpha.
10164 o Minor bugfixes (logging, backport from 0.3.3.2-alpha):
10165 - Don't treat inability to store a cached consensus object as a bug:
10166 it can happen normally when we are out of disk space. Fixes bug
10167 24859; bugfix on 0.3.1.1-alpha.
10169 o Minor bugfixes (memory usage, backport from 0.3.2.8-rc):
10170 - When queuing DESTROY cells on a channel, only queue the circuit-id
10171 and reason fields: not the entire 514-byte cell. This fix should
10172 help mitigate any bugs or attacks that fill up these queues, and
10173 free more RAM for other uses. Fixes bug 24666; bugfix
10176 o Minor bugfixes (network layer, backport from 0.3.2.5-alpha):
10177 - When closing a connection via close_connection_immediately(), we
10178 mark it as "not blocked on bandwidth", to prevent later calls from
10179 trying to unblock it, and give it permission to read. This fixes a
10180 backtrace warning that can happen on relays under various
10181 circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
10183 o Minor bugfixes (path selection, backport from 0.3.2.4-alpha):
10184 - When selecting relays by bandwidth, avoid a rounding error that
10185 could sometimes cause load to be imbalanced incorrectly.
10186 Previously, we would always round upwards; now, we round towards
10187 the nearest integer. This had the biggest effect when a relay's
10188 weight adjustments should have given it weight 0, but it got
10189 weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
10190 - When calculating the fraction of nodes that have descriptors, and
10191 all nodes in the network have zero bandwidths, count the number of
10192 nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
10193 - Actually log the total bandwidth in compute_weighted_bandwidths().
10194 Fixes bug 24170; bugfix on 0.2.4.3-alpha.
10196 o Minor bugfixes (performance, fragile-hardening, backport from 0.3.3.1-alpha):
10197 - Improve the performance of our consensus-diff application code
10198 when Tor is built with the --enable-fragile-hardening option set.
10199 Fixes bug 24826; bugfix on 0.3.1.1-alpha.
10201 o Minor bugfixes (OSX, backport from 0.3.3.1-alpha):
10202 - Don't exit the Tor process if setrlimit() fails to change the file
10203 limit (which can happen sometimes on some versions of OSX). Fixes
10204 bug 21074; bugfix on 0.0.9pre5.
10206 o Minor bugfixes (portability, msvc, backport from 0.3.2.9):
10207 - Fix a bug in the bit-counting parts of our timing-wheel code on
10208 MSVC. (Note that MSVC is still not a supported build platform, due
10209 to cyptographic timing channel risks.) Fixes bug 24633; bugfix
10212 o Minor bugfixes (relay, partial backport):
10213 - Make the internal channel_is_client() function look at what sort
10214 of connection handshake the other side used, rather than whether
10215 the other side ever sent a create_fast cell to us. Backports part
10216 of the fixes from bugs 22805 and 24898.
10218 o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
10219 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
10221 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
10222 bugfix on 0.2.9.4-alpha.
10224 o Code simplification and refactoring (backport from 0.3.3.3-alpha):
10225 - Update the "rust dependencies" submodule to be a project-level
10226 repository, rather than a user repository. Closes ticket 25323.
10229 Changes in version 0.2.9.15 - 2018-03-03
10230 Tor 0.2.9.15 backports important security and stability bugfixes from
10231 later Tor releases.
10233 It includes an important security fix for a remote crash attack
10234 against directory authorities, tracked as TROVE-2018-001.
10236 This release also backports our new system for improved resistance to
10237 denial-of-service attacks against relays.
10239 This release also fixes several minor bugs and annoyances from
10242 All directory authorities should upgrade to one of the versions
10243 released today. Relays running 0.2.9.x may wish to update to one of
10244 the versions released today, for the DoS mitigations.
10246 o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
10247 - Fix a protocol-list handling bug that could be used to remotely crash
10248 directory authorities with a null-pointer exception. Fixes bug 25074;
10249 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
10252 o Major features (denial-of-service mitigation):
10253 - Give relays some defenses against the recent network overload. We
10254 start with three defenses (default parameters in parentheses).
10255 First: if a single client address makes too many concurrent
10256 connections (>100), hang up on further connections. Second: if a
10257 single client address makes circuits too quickly (more than 3 per
10258 second, with an allowed burst of 90) while also having too many
10259 connections open (3), refuse new create cells for the next while
10260 (1-2 hours). Third: if a client asks to establish a rendezvous
10261 point to you directly, ignore the request. These defenses can be
10262 manually controlled by new torrc options, but relays will also
10263 take guidance from consensus parameters, so there's no need to
10264 configure anything manually. Implements ticket 24902.
10266 o Major bugfixes (bootstrapping):
10267 - Fetch descriptors aggressively whenever we lack enough to build
10268 circuits, regardless of how many descriptors we are missing.
10269 Previously, we would delay launching the fetch when we had fewer
10270 than 15 missing descriptors, even if some of those descriptors
10271 were blocking circuits from building. Fixes bug 23985; bugfix on
10272 0.1.1.11-alpha. The effects of this bug became worse in
10273 0.3.0.3-alpha, when we began treating missing descriptors from our
10274 primary guards as a reason to delay circuits.
10276 o Major bugfixes (onion services, retry behavior):
10277 - Fix an "off by 2" error in counting rendezvous failures on the
10278 onion service side. While we thought we would stop the rendezvous
10279 attempt after one failed circuit, we were actually making three
10280 circuit attempts before giving up. Now switch to a default of 2,
10281 and allow the consensus parameter "hs_service_max_rdv_failures" to
10282 override. Fixes bug 24895; bugfix on 0.0.6.
10284 o Minor feature (relay statistics):
10285 - Change relay bandwidth reporting stats interval from 4 hours to 24
10286 hours in order to reduce the efficiency of guard discovery
10287 attacks. Fixes ticket 23856.
10289 o Minor features (compatibility, OpenSSL):
10290 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
10291 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
10292 since they neither disabled TLS 1.3 nor enabled any of the
10293 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
10294 Closes ticket 24978.
10296 o Minor features (denial-of-service avoidance):
10297 - Make our OOM handler aware of the geoip client history cache so it
10298 doesn't fill up the memory. This check is important for IPv6 and
10299 our DoS mitigation subsystem. Closes ticket 25122.
10301 o Minor features (fallback directory mirrors):
10302 - The fallback directory list has been re-generated based on the
10303 current status of the network. Tor uses fallback directories to
10304 bootstrap when it doesn't yet have up-to-date directory
10305 information. Closes ticket 24801.
10306 - Make the default DirAuthorityFallbackRate 0.1, so that clients
10307 prefer to bootstrap from fallback directory mirrors. This is a
10308 follow-up to 24679, which removed weights from the default
10309 fallbacks. Implements ticket 24681.
10311 o Minor features (geoip):
10312 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
10315 o Minor features (linux seccomp2 sandbox):
10316 - Update the sandbox rules so that they should now work correctly
10317 with Glibc 2.26. Closes ticket 24315.
10319 o Minor bugfix (channel connection):
10320 - Use the actual observed address of an incoming relay connection,
10321 not the canonical address of the relay from its descriptor, when
10322 making decisions about how to handle the incoming connection.
10323 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
10325 o Minor bugfix (directory authority):
10326 - Directory authorities, when refusing a descriptor from a rejected
10327 relay, now explicitly tell the relay (in its logs) to set a valid
10328 ContactInfo address and contact the bad-relays@ mailing list.
10329 Fixes bug 25170; bugfix on 0.2.9.1.
10331 o Minor bugfixes (address selection):
10332 - When the fascist_firewall_choose_address_ functions don't find a
10333 reachable address, set the returned address to the null address
10334 and port. This is a precautionary measure, because some callers do
10335 not check the return value. Fixes bug 24736; bugfix
10338 o Minor bugfixes (compilation):
10339 - Fix a signed/unsigned comparison warning introduced by our fix to
10340 TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
10342 o Minor bugfixes (control port, linux seccomp2 sandbox):
10343 - Avoid a crash when attempting to use the seccomp2 sandbox together
10344 with the OwningControllerProcess feature. Fixes bug 24198; bugfix
10347 o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
10348 - Fix a possible crash on malformed consensus. If a consensus had
10349 contained an unparseable protocol line, it could have made clients
10350 and relays crash with a null-pointer exception. To exploit this
10351 issue, however, an attacker would need to be able to subvert the
10352 directory authority system. Fixes bug 25251; bugfix on
10353 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
10355 o Minor bugfixes (memory usage):
10356 - When queuing DESTROY cells on a channel, only queue the circuit-id
10357 and reason fields: not the entire 514-byte cell. This fix should
10358 help mitigate any bugs or attacks that fill up these queues, and
10359 free more RAM for other uses. Fixes bug 24666; bugfix
10362 o Minor bugfixes (network layer):
10363 - When closing a connection via close_connection_immediately(), we
10364 mark it as "not blocked on bandwidth", to prevent later calls from
10365 trying to unblock it, and give it permission to read. This fixes a
10366 backtrace warning that can happen on relays under various
10367 circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
10369 o Minor bugfixes (OSX):
10370 - Don't exit the Tor process if setrlimit() fails to change the file
10371 limit (which can happen sometimes on some versions of OSX). Fixes
10372 bug 21074; bugfix on 0.0.9pre5.
10374 o Minor bugfixes (path selection):
10375 - When selecting relays by bandwidth, avoid a rounding error that
10376 could sometimes cause load to be imbalanced incorrectly.
10377 Previously, we would always round upwards; now, we round towards
10378 the nearest integer. This had the biggest effect when a relay's
10379 weight adjustments should have given it weight 0, but it got
10380 weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
10381 - When calculating the fraction of nodes that have descriptors, and
10382 all nodes in the network have zero bandwidths, count the number of
10383 nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
10384 - Actually log the total bandwidth in compute_weighted_bandwidths().
10385 Fixes bug 24170; bugfix on 0.2.4.3-alpha.
10387 o Minor bugfixes (portability, msvc):
10388 - Fix a bug in the bit-counting parts of our timing-wheel code on
10389 MSVC. (Note that MSVC is still not a supported build platform, due
10390 to cryptographic timing channel risks.) Fixes bug 24633; bugfix
10393 o Minor bugfixes (relay):
10394 - Make the internal channel_is_client() function look at what sort
10395 of connection handshake the other side used, rather than whether
10396 the other side ever sent a create_fast cell to us. Backports part
10397 of the fixes from bugs 22805 and 24898.
10399 o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
10400 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
10402 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
10403 bugfix on 0.2.9.4-alpha.
10406 Changes in version 0.3.2.10 - 2018-03-03
10407 Tor 0.3.2.10 is the second stable release in the 0.3.2 series. It
10408 backports a number of bugfixes, including important fixes for security
10411 It includes an important security fix for a remote crash attack
10412 against directory authorities, tracked as TROVE-2018-001.
10414 Additionally, it backports a fix for a bug whose severity we have
10415 upgraded: Bug 24700, which was fixed in 0.3.3.2-alpha, can be remotely
10416 triggered in order to crash relays with a use-after-free pattern. As
10417 such, we are now tracking that bug as TROVE-2018-002 and
10418 CVE-2018-0491, and backporting it to earlier releases. This bug
10419 affected versions 0.3.2.1-alpha through 0.3.2.9, as well as version
10422 This release also backports our new system for improved resistance to
10423 denial-of-service attacks against relays.
10425 This release also fixes several minor bugs and annoyances from
10428 Relays running 0.3.2.x SHOULD upgrade to one of the versions released
10429 today, for the fix to TROVE-2018-002. Directory authorities should
10430 also upgrade. (Relays on earlier versions might want to update too for
10431 the DoS mitigations.)
10433 o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
10434 - Fix a protocol-list handling bug that could be used to remotely crash
10435 directory authorities with a null-pointer exception. Fixes bug 25074;
10436 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
10439 o Major bugfixes (scheduler, KIST, denial-of-service, backport from 0.3.3.2-alpha):
10440 - Avoid adding the same channel twice in the KIST scheduler pending
10441 list, which could lead to remote denial-of-service use-after-free
10442 attacks against relays. Fixes bug 24700; bugfix on 0.3.2.1-alpha.
10444 o Major features (denial-of-service mitigation, backport from 0.3.3.2-alpha):
10445 - Give relays some defenses against the recent network overload. We
10446 start with three defenses (default parameters in parentheses).
10447 First: if a single client address makes too many concurrent
10448 connections (>100), hang up on further connections. Second: if a
10449 single client address makes circuits too quickly (more than 3 per
10450 second, with an allowed burst of 90) while also having too many
10451 connections open (3), refuse new create cells for the next while
10452 (1-2 hours). Third: if a client asks to establish a rendezvous
10453 point to you directly, ignore the request. These defenses can be
10454 manually controlled by new torrc options, but relays will also
10455 take guidance from consensus parameters, so there's no need to
10456 configure anything manually. Implements ticket 24902.
10458 o Major bugfixes (onion services, retry behavior, backport from 0.3.3.1-alpha):
10459 - Fix an "off by 2" error in counting rendezvous failures on the
10460 onion service side. While we thought we would stop the rendezvous
10461 attempt after one failed circuit, we were actually making three
10462 circuit attempts before giving up. Now switch to a default of 2,
10463 and allow the consensus parameter "hs_service_max_rdv_failures" to
10464 override. Fixes bug 24895; bugfix on 0.0.6.
10465 - New-style (v3) onion services now obey the "max rendezvous circuit
10466 attempts" logic. Previously they would make as many rendezvous
10467 circuit attempts as they could fit in the MAX_REND_TIMEOUT second
10468 window before giving up. Fixes bug 24894; bugfix on 0.3.2.1-alpha.
10470 o Major bugfixes (protocol versions, backport from 0.3.3.2-alpha):
10471 - Add Link protocol version 5 to the supported protocols list. Fixes
10472 bug 25070; bugfix on 0.3.1.1-alpha.
10474 o Major bugfixes (relay, backport from 0.3.3.1-alpha):
10475 - Fix a set of false positives where relays would consider
10476 connections to other relays as being client-only connections (and
10477 thus e.g. deserving different link padding schemes) if those
10478 relays fell out of the consensus briefly. Now we look only at the
10479 initial handshake and whether the connection authenticated as a
10480 relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
10482 o Major bugfixes (scheduler, consensus, backport from 0.3.3.2-alpha):
10483 - The scheduler subsystem was failing to promptly notice changes in
10484 consensus parameters, making it harder to switch schedulers
10485 network-wide. Fixes bug 24975; bugfix on 0.3.2.1-alpha.
10487 o Minor features (denial-of-service avoidance, backport from 0.3.3.2-alpha):
10488 - Make our OOM handler aware of the geoip client history cache so it
10489 doesn't fill up the memory. This check is important for IPv6 and
10490 our DoS mitigation subsystem. Closes ticket 25122.
10492 o Minor features (compatibility, OpenSSL, backport from 0.3.3.3-alpha):
10493 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
10494 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
10495 since they neither disabled TLS 1.3 nor enabled any of the
10496 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
10497 Closes ticket 24978.
10499 o Minor features (geoip):
10500 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
10503 o Minor features (logging, diagnostic, backport from 0.3.3.2-alpha):
10504 - When logging a failure to create an onion service's descriptor,
10505 also log what the problem with the descriptor was. Diagnostic
10508 o Minor bugfix (channel connection, backport from 0.3.3.2-alpha):
10509 - Use the actual observed address of an incoming relay connection,
10510 not the canonical address of the relay from its descriptor, when
10511 making decisions about how to handle the incoming connection.
10512 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
10514 o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
10515 - Fix a possible crash on malformed consensus. If a consensus had
10516 contained an unparseable protocol line, it could have made clients
10517 and relays crash with a null-pointer exception. To exploit this
10518 issue, however, an attacker would need to be able to subvert the
10519 directory authority system. Fixes bug 25251; bugfix on
10520 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
10522 o Minor bugfix (directory authority, backport from 0.3.3.2-alpha):
10523 - Directory authorities, when refusing a descriptor from a rejected
10524 relay, now explicitly tell the relay (in its logs) to set a valid
10525 ContactInfo address and contact the bad-relays@ mailing list.
10526 Fixes bug 25170; bugfix on 0.2.9.1.
10528 o Minor bugfixes (build, rust, backport from 0.3.3.1-alpha):
10529 - When building with Rust on OSX, link against libresolv, to work
10530 around the issue at https://github.com/rust-lang/rust/issues/46797.
10531 Fixes bug 24652; bugfix on 0.3.1.1-alpha.
10533 o Minor bugfixes (onion services, backport from 0.3.3.2-alpha):
10534 - Remove a BUG() statement when a client fetches an onion descriptor
10535 that has a lower revision counter than the one in its cache. This
10536 can happen in normal circumstances due to HSDir desync. Fixes bug
10537 24976; bugfix on 0.3.2.1-alpha.
10539 o Minor bugfixes (logging, backport from 0.3.3.2-alpha):
10540 - Don't treat inability to store a cached consensus object as a bug:
10541 it can happen normally when we are out of disk space. Fixes bug
10542 24859; bugfix on 0.3.1.1-alpha.
10544 o Minor bugfixes (performance, fragile-hardening, backport from 0.3.3.1-alpha):
10545 - Improve the performance of our consensus-diff application code
10546 when Tor is built with the --enable-fragile-hardening option set.
10547 Fixes bug 24826; bugfix on 0.3.1.1-alpha.
10549 o Minor bugfixes (OSX, backport from 0.3.3.1-alpha):
10550 - Don't exit the Tor process if setrlimit() fails to change the file
10551 limit (which can happen sometimes on some versions of OSX). Fixes
10552 bug 21074; bugfix on 0.0.9pre5.
10554 o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
10555 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
10557 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
10558 bugfix on 0.2.9.4-alpha.
10560 o Minor bugfixes (testing, backport from 0.3.3.1-alpha):
10561 - Fix a memory leak in the scheduler/loop_kist unit test. Fixes bug
10562 25005; bugfix on 0.3.2.7-rc.
10564 o Minor bugfixes (v3 onion services, backport from 0.3.3.2-alpha):
10565 - Look at the "HSRend" protocol version, not the "HSDir" protocol
10566 version, when deciding whether a consensus entry can support the
10567 v3 onion service protocol as a rendezvous point. Fixes bug 25105;
10568 bugfix on 0.3.2.1-alpha.
10570 o Code simplification and refactoring (backport from 0.3.3.3-alpha):
10571 - Update the "rust dependencies" submodule to be a project-level
10572 repository, rather than a user repository. Closes ticket 25323.
10574 o Documentation (backport from 0.3.3.1-alpha)
10575 - Document that operators who run more than one relay or bridge are
10576 expected to set MyFamily and ContactInfo correctly. Closes
10580 Changes in version 0.3.3.3-alpha - 2018-03-03
10581 Tor 0.3.3.3-alpha is the third alpha release for the 0.3.3.x series.
10582 It includes an important security fix for a remote crash attack
10583 against directory authorities tracked as TROVE-2018-001.
10585 Additionally, with this release, we are upgrading the severity of a
10586 bug fixed in 0.3.3.2-alpha. Bug 24700, which was fixed in
10587 0.3.3.2-alpha, can be remotely triggered in order to crash relays with
10588 a use-after-free pattern. As such, we are now tracking that bug as
10589 TROVE-2018-002 and CVE-2018-0491. This bug affected versions
10590 0.3.2.1-alpha through 0.3.2.9, as well as 0.3.3.1-alpha.
10592 This release also fixes several minor bugs and annoyances from
10595 Relays running 0.3.2.x should upgrade to one of the versions released
10596 today, for the fix to TROVE-2018-002. Directory authorities should
10597 also upgrade. (Relays on earlier versions might want to update too for
10598 the DoS mitigations.)
10600 o Major bugfixes (denial-of-service, directory authority):
10601 - Fix a protocol-list handling bug that could be used to remotely crash
10602 directory authorities with a null-pointer exception. Fixes bug 25074;
10603 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
10606 o Minor features (compatibility, OpenSSL):
10607 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
10608 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
10609 since they neither disabled TLS 1.3 nor enabled any of the
10610 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
10611 Closes ticket 24978.
10613 o Minor features (logging):
10614 - Clarify the log messages produced when getrandom() or a related
10615 entropy-generation mechanism gives an error. Closes ticket 25120.
10617 o Minor features (testing):
10618 - Add a "make test-rust" target to run the rust tests only. Closes
10621 o Minor bugfixes (denial-of-service):
10622 - Fix a possible crash on malformed consensus. If a consensus had
10623 contained an unparseable protocol line, it could have made clients
10624 and relays crash with a null-pointer exception. To exploit this
10625 issue, however, an attacker would need to be able to subvert the
10626 directory authority system. Fixes bug 25251; bugfix on
10627 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
10629 o Minor bugfixes (DoS mitigation):
10630 - Add extra safety checks when refilling the circuit creation bucket
10631 to ensure we never set a value above the allowed maximum burst.
10632 Fixes bug 25202; bugfix on 0.3.3.2-alpha.
10633 - When a new consensus arrives, don't update our DoS-mitigation
10634 parameters if we aren't a public relay. Fixes bug 25223; bugfix
10637 o Minor bugfixes (man page, SocksPort):
10638 - Remove dead code from the old "SocksSocket" option, and rename
10639 SocksSocketsGroupWritable to UnixSocksGroupWritable. The old option
10640 still works, but is deprecated. Fixes bug 24343; bugfix on 0.2.6.3.
10642 o Minor bugfixes (performance):
10643 - Reduce the number of circuits that will be opened at once during
10644 the circuit build timeout phase. This is done by increasing the
10645 idle timeout to 3 minutes, and lowering the maximum number of
10646 concurrent learning circuits to 10. Fixes bug 24769; bugfix
10649 o Minor bugfixes (spec conformance):
10650 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
10652 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
10653 bugfix on 0.2.9.4-alpha.
10655 o Minor bugfixes (spec conformance, rust):
10656 - Resolve a denial-of-service issue caused by an infinite loop in
10657 the rust protover code. Fixes bug 25250, bugfix on 0.3.3.1-alpha.
10658 Also tracked as TROVE-2018-003.
10660 o Code simplification and refactoring:
10661 - Update the "rust dependencies" submodule to be a project-level
10662 repository, rather than a user repository. Closes ticket 25323.
10665 Changes in version 0.3.3.2-alpha - 2018-02-10
10666 Tor 0.3.3.2-alpha is the second alpha in the 0.3.3.x series. It
10667 introduces a mechanism to handle the high loads that many relay
10668 operators have been reporting recently. It also fixes several bugs in
10669 older releases. If this new code proves reliable, we plan to backport
10670 it to older supported release series.
10672 o Major features (denial-of-service mitigation):
10673 - Give relays some defenses against the recent network overload. We
10674 start with three defenses (default parameters in parentheses).
10675 First: if a single client address makes too many concurrent
10676 connections (>100), hang up on further connections. Second: if a
10677 single client address makes circuits too quickly (more than 3 per
10678 second, with an allowed burst of 90) while also having too many
10679 connections open (3), refuse new create cells for the next while
10680 (1-2 hours). Third: if a client asks to establish a rendezvous
10681 point to you directly, ignore the request. These defenses can be
10682 manually controlled by new torrc options, but relays will also
10683 take guidance from consensus parameters, so there's no need to
10684 configure anything manually. Implements ticket 24902.
10686 o Major bugfixes (netflow padding):
10687 - Stop adding unneeded channel padding right after we finish
10688 flushing to a connection that has been trying to flush for many
10689 seconds. Instead, treat all partial or complete flushes as
10690 activity on the channel, which will defer the time until we need
10691 to add padding. This fix should resolve confusing and scary log
10692 messages like "Channel padding timeout scheduled 221453ms in the
10693 past." Fixes bug 22212; bugfix on 0.3.1.1-alpha.
10695 o Major bugfixes (protocol versions):
10696 - Add Link protocol version 5 to the supported protocols list. Fixes
10697 bug 25070; bugfix on 0.3.1.1-alpha.
10699 o Major bugfixes (scheduler, consensus):
10700 - The scheduler subsystem was failing to promptly notice changes in
10701 consensus parameters, making it harder to switch schedulers
10702 network-wide. Fixes bug 24975; bugfix on 0.3.2.1-alpha.
10704 o Minor features (denial-of-service avoidance):
10705 - Make our OOM handler aware of the geoip client history cache so it
10706 doesn't fill up the memory. This check is important for IPv6 and
10707 our DoS mitigation subsystem. Closes ticket 25122.
10709 o Minor features (directory authority):
10710 - When directory authorities are unable to add signatures to a
10711 pending consensus, log the reason why. Closes ticket 24849.
10713 o Minor features (geoip):
10714 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
10717 o Minor features (logging, diagnostic):
10718 - When logging a failure to create an onion service's descriptor,
10719 also log what the problem with the descriptor was. Diagnostic for
10722 o Minor bugfix (channel connection):
10723 - Use the actual observed address of an incoming relay connection,
10724 not the canonical address of the relay from its descriptor, when
10725 making decisions about how to handle the incoming connection.
10726 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
10728 o Minor bugfix (directory authority):
10729 - Directory authorities, when refusing a descriptor from a rejected
10730 relay, now explicitly tell the relay (in its logs) to set a valid
10731 ContactInfo address and contact the bad-relays@ mailing list.
10732 Fixes bug 25170; bugfix on 0.2.9.1.
10734 o Minor bugfixes (all versions of Tor):
10735 - Use the "misspell" tool to detect and fix typos throughout the
10736 source code. Fixes bug 23650; bugfix on various versions of Tor.
10737 Patch from Deepesh Pathak.
10739 o Minor bugfixes (circuit, cannibalization):
10740 - Don't cannibalize preemptively-built circuits if we no longer
10741 recognize their first hop. This situation can happen if our Guard
10742 relay went off the consensus after the circuit was created. Fixes
10743 bug 24469; bugfix on 0.0.6.
10745 o Minor bugfixes (correctness):
10746 - Remove a nonworking, unnecessary check to see whether a circuit
10747 hop's identity digest was set when the circuit failed. Fixes bug
10748 24927; bugfix on 0.2.4.4-alpha.
10750 o Minor bugfixes (logging):
10751 - Don't treat inability to store a cached consensus object as a bug:
10752 it can happen normally when we are out of disk space. Fixes bug
10753 24859; bugfix on 0.3.1.1-alpha.
10754 - Fix a (mostly harmless) race condition when invoking
10755 LOG_PROTOCOL_WARN message from a subthread while the torrc options
10756 are changing. Fixes bug 23954; bugfix on 0.1.1.9-alpha.
10758 o Minor bugfixes (onion services):
10759 - Remove a BUG() statement when a client fetches an onion descriptor
10760 that has a lower revision counter than the one in its cache. This
10761 can happen in normal circumstances due to HSDir desync. Fixes bug
10762 24976; bugfix on 0.3.2.1-alpha.
10763 - If we are configured to offer a single onion service, don't log
10764 long-term established one hop rendezvous points in the heartbeat.
10765 Fixes bug 25116; bugfix on 0.2.9.6-rc.
10767 o Minor bugfixes (performance):
10768 - Avoid calling protocol_list_supports_protocol() from inside tight
10769 loops when running with cached routerinfo_t objects. Instead,
10770 summarize the relevant protocols as flags in the routerinfo_t, as
10771 we do for routerstatus_t objects. This change simplifies our code
10772 a little, and saves a large amount of short-term memory allocation
10773 operations. Fixes bug 25008; bugfix on 0.2.9.4-alpha.
10775 o Minor bugfixes (Rust FFI):
10776 - Fix a minor memory leak which would happen whenever the C code
10777 would call the Rust implementation of
10778 protover_get_supported_protocols(). This was due to the C version
10779 returning a static string, whereas the Rust version newly allocated
10780 a CString to pass across the FFI boundary. Consequently, the C
10781 code was not expecting to need to free() what it was given. Fixes
10782 bug 25127; bugfix on 0.3.2.1-alpha.
10784 o Minor bugfixes (scheduler, KIST):
10785 - Avoid adding the same channel twice in the KIST scheduler pending
10786 list, which would waste CPU cycles. Fixes bug 24700; bugfix
10789 o Minor bugfixes (unit test, monotonic time):
10790 - Increase a constant (1msec to 10msec) in the monotonic time test
10791 that makes sure the nsec/usec/msec times read are synchronized.
10792 This change was needed to accommodate slow systems like armel or
10793 when the clock_gettime() is not a VDSO on the running kernel.
10794 Fixes bug 25113; bugfix on 0.2.9.1.
10796 o Minor bugfixes (v3 onion services):
10797 - Look at the "HSRend" protocol version, not the "HSDir" protocol
10798 version, when deciding whether a consensus entry can support the
10799 v3 onion service protocol as a rendezvous point. Fixes bug 25105;
10800 bugfix on 0.3.2.1-alpha.
10802 o Code simplification and refactoring:
10803 - Remove the unused nodelist_recompute_all_hsdir_indices(). Closes
10805 - Remove a series of counters used to track circuit extend attempts
10806 and connection status but that in reality we aren't using for
10807 anything other than stats logged by a SIGUSR1 signal. Closes
10810 o Documentation (man page):
10811 - The HiddenServiceVersion torrc option accepts only one number:
10812 either version 2 or 3. Closes ticket 25026; bugfix
10816 Changes in version 0.3.3.1-alpha - 2018-01-25
10817 Tor 0.3.3.1-alpha is the first release in the 0.3.3.x series. It adds
10818 several new features to Tor, including several improvements to
10819 bootstrapping, and support for an experimental "vanguards" feature to
10820 resist guard discovery attacks. This series also includes better
10821 support for applications that need to embed Tor or manage v3
10824 o Major features (embedding):
10825 - There is now a documented stable API for programs that need to
10826 embed Tor. See tor_api.h for full documentation and known bugs.
10827 Closes ticket 23684.
10828 - Tor now has support for restarting in the same process.
10829 Controllers that run Tor using the "tor_api.h" interface can now
10830 restart Tor after Tor has exited. This support is incomplete,
10831 however: we fixed crash bugs that prevented it from working at
10832 all, but many bugs probably remain, including a possibility of
10833 security issues. Implements ticket 24581.
10835 o Major features (IPv6, directory documents):
10836 - Add consensus method 27, which adds IPv6 ORPorts to the microdesc
10837 consensus. This information makes it easier for IPv6 clients to
10838 bootstrap and choose reachable entry guards. Implements ticket 23826.
10839 - Add consensus method 28, which removes IPv6 ORPorts from
10840 microdescriptors. Now that the consensus contains IPv6 ORPorts, they
10841 are redundant in microdescs. This change will be used by Tor clients
10842 on 0.2.8.x and later. (That is to say, with all Tor clients that
10843 have IPv6 bootstrap and guard support.) Implements ticket 23828.
10844 - Expand the documentation for AuthDirHasIPv6Connectivity when it is
10845 set by different numbers of authorities. Fixes 23870
10848 o Major features (onion service v3, control port):
10849 - The control port now supports commands and events for v3 onion
10850 services. It is now possible to create ephemeral v3 services using
10851 ADD_ONION. Additionally, several events (HS_DESC, HS_DESC_CONTENT,
10852 CIRC and CIRC_MINOR) and commands (GETINFO, HSPOST, ADD_ONION and
10853 DEL_ONION) have been extended to support v3 onion services. Closes
10854 ticket 20699; implements proposal 284.
10856 o Major features (onion services):
10857 - Provide torrc options to pin the second and third hops of onion
10858 service circuits to a list of nodes. The option HSLayer2Guards
10859 pins the second hop, and the option HSLayer3Guards pins the third
10860 hop. These options are for use in conjunction with experiments
10861 with "vanguards" for preventing guard enumeration attacks. Closes
10864 o Major features (rust, portability, experimental):
10865 - Tor now ships with an optional implementation of one of its
10866 smaller modules (protover.c) in the Rust programming language. To
10867 try it out, install a Rust build environment, and configure Tor
10868 with "--enable-rust --enable-cargo-online-mode". This should not
10869 cause any user-visible changes, but should help us gain more
10870 experience with Rust, and plan future Rust integration work.
10871 Implementation by Chelsea Komlo. Closes ticket 22840.
10873 o Minor features (storage, configuration):
10874 - Users can store cached directory documents somewhere other than
10875 the DataDirectory by using the CacheDirectory option. Similarly,
10876 the storage location for relay's keys can be overridden with the
10877 KeyDirectory option. Closes ticket 22703.
10879 o Major features (v3 onion services, ipv6):
10880 - When v3 onion service clients send introduce cells, they now
10881 include the IPv6 address of the rendezvous point, if it has one.
10882 Current v3 onion services running 0.3.2 ignore IPv6 addresses, but
10883 in future Tor versions, IPv6-only v3 single onion services will be
10884 able to use IPv6 addresses to connect directly to the rendezvous
10885 point. Closes ticket 23577. Patch by Neel Chauhan.
10887 o Major bugfixes (onion services, retry behavior):
10888 - Fix an "off by 2" error in counting rendezvous failures on the
10889 onion service side. While we thought we would stop the rendezvous
10890 attempt after one failed circuit, we were actually making three
10891 circuit attempts before giving up. Now switch to a default of 2,
10892 and allow the consensus parameter "hs_service_max_rdv_failures" to
10893 override. Fixes bug 24895; bugfix on 0.0.6.
10894 - New-style (v3) onion services now obey the "max rendezvous circuit
10895 attempts" logic. Previously they would make as many rendezvous
10896 circuit attempts as they could fit in the MAX_REND_TIMEOUT second
10897 window before giving up. Fixes bug 24894; bugfix on 0.3.2.1-alpha.
10899 o Major bugfixes (relays):
10900 - Fix a set of false positives where relays would consider
10901 connections to other relays as being client-only connections (and
10902 thus e.g. deserving different link padding schemes) if those
10903 relays fell out of the consensus briefly. Now we look only at the
10904 initial handshake and whether the connection authenticated as a
10905 relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
10907 o Minor feature (IPv6):
10908 - Make IPv6-only clients wait for microdescs for relays, even if we
10909 were previously using descriptors (or were using them as a bridge)
10910 and have a cached descriptor for them. Implements ticket 23827.
10911 - When a consensus has IPv6 ORPorts, make IPv6-only clients use
10912 them, rather than waiting to download microdescriptors.
10913 Implements ticket 23827.
10915 o Minor features (cleanup):
10916 - Tor now deletes the CookieAuthFile and ExtORPortCookieAuthFile
10917 when it stops. Closes ticket 23271.
10919 o Minor features (defensive programming):
10920 - Most of the functions in Tor that free objects have been replaced
10921 with macros that free the objects and set the corresponding
10922 pointers to NULL. This change should help prevent a large class of
10923 dangling pointer bugs. Closes ticket 24337.
10924 - Where possible, the tor_free() macro now only evaluates its input
10925 once. Part of ticket 24337.
10926 - Check that microdesc ed25519 ids are non-zero in
10927 node_get_ed25519_id() before returning them. Implements ticket
10928 24001, patch by "aruna1234".
10930 o Minor features (embedding):
10931 - Tor can now start with a preauthenticated control connection
10932 created by the process that launched it. This feature is meant for
10933 use by programs that want to launch and manage a Tor process
10934 without allowing other programs to manage it as well. For more
10935 information, see the __OwningControllerFD option documented in
10936 control-spec.txt. Closes ticket 23900.
10937 - On most errors that would cause Tor to exit, it now tries to
10938 return from the tor_main() function, rather than calling the
10939 system exit() function. Most users won't notice a difference here,
10940 but it should be significant for programs that run Tor inside
10941 a separate thread: they should now be able to survive Tor's exit
10942 conditions rather than having Tor shut down the entire process.
10943 Closes ticket 23848.
10944 - Applications that want to embed Tor can now tell Tor not to
10945 register any of its own POSIX signal handlers, using the
10946 __DisableSignalHandlers option. Closes ticket 24588.
10948 o Minor features (fallback directory list):
10949 - Avoid selecting fallbacks that change their IP addresses too
10950 often. Select more fallbacks by ignoring the Guard flag, and
10951 allowing lower cutoffs for the Running and V2Dir flags. Also allow
10952 a lower bandwidth, and a higher number of fallbacks per operator
10953 (5% of the list). Implements ticket 24785.
10954 - Update the fallback whitelist and blacklist based on opt-ins and
10955 relay changes. Closes tickets 22321, 24678, 22527, 24135,
10958 o Minor features (fallback directory mirror configuration):
10959 - Add a nickname to each fallback in a C comment. This makes it
10960 easier for operators to find their relays, and allows stem to use
10961 nicknames to identify fallbacks. Implements ticket 24600.
10962 - Add a type and version header to the fallback directory mirror
10963 file. Also add a delimiter to the end of each fallback entry. This
10964 helps external parsers like stem and Relay Search. Implements
10966 - Add an extrainfo cache flag for each fallback in a C comment. This
10967 allows stem to use fallbacks to fetch extra-info documents, rather
10968 than using authorities. Implements ticket 22759.
10969 - Add the generateFallbackDirLine.py script for automatically
10970 generating fallback directory mirror lines from relay fingerprints.
10971 No more typos! Add the lookupFallbackDirContact.py script for
10972 automatically looking up operator contact info from relay
10973 fingerprints. Implements ticket 24706, patch by teor and atagar.
10974 - Reject any fallback directory mirror that serves an expired
10975 consensus. Implements ticket 20942, patch by "minik".
10976 - Remove commas and equals signs from external string inputs to the
10977 fallback list. This avoids format confusion attacks. Implements
10979 - Remove the "weight=10" line from fallback directory mirror
10980 entries. Ticket 24681 will maintain the current fallback weights
10981 by changing Tor's default fallback weight to 10. Implements
10983 - Stop logging excessive information about fallback netblocks.
10984 Implements ticket 24791.
10986 o Minor features (forward-compatibility):
10987 - If a relay supports some link authentication protocol that we do
10988 not recognize, then include that relay's ed25519 key when telling
10989 other relays to extend to it. Previously, we treated future
10990 versions as if they were too old to support ed25519 link
10991 authentication. Closes ticket 20895.
10993 o Minor features (heartbeat):
10994 - Add onion service information to our heartbeat logs, displaying
10995 stats about the activity of configured onion services. Closes
10998 o Minor features (instrumentation, development):
10999 - Add the MainloopStats option to allow developers to get
11000 instrumentation information from the main event loop via the
11001 heartbeat messages. We hope to use this to improve Tor's behavior
11002 when it's trying to sleep. Closes ticket 24605.
11004 o Minor features (log messages):
11005 - Improve a warning message that happens when we fail to re-parse an
11006 old router because of an expired certificate. Closes ticket 20020.
11007 - Make the log more quantitative when we hit MaxMemInQueues
11008 threshold exposing some values. Closes ticket 24501.
11010 o Minor features (logging, android):
11011 - Added support for the Android logging subsystem. Closes
11014 o Minor features (performance):
11015 - Support predictive circuit building for onion service circuits
11016 with multiple layers of guards. Closes ticket 23101.
11017 - Use stdatomic.h where available, rather than mutexes, to implement
11018 atomic_counter_t. Closes ticket 23953.
11020 o Minor features (performance, 32-bit):
11021 - Improve performance on 32-bit systems by avoiding 64-bit division
11022 when calculating the timestamp in milliseconds for channel padding
11023 computations. Implements ticket 24613.
11024 - Improve performance on 32-bit systems by avoiding 64-bit division
11025 when timestamping cells and buffer chunks for OOM calculations.
11026 Implements ticket 24374.
11028 o Minor features (performance, OSX, iOS):
11029 - Use the mach_approximate_time() function (when available) to
11030 implement coarse monotonic time. Having a coarse time function
11031 should avoid a large number of system calls, and improve
11032 performance slightly, especially under load. Closes ticket 24427.
11034 o Minor features (performance, windows):
11035 - Improve performance on Windows Vista and Windows 7 by adjusting
11036 TCP send window size according to the recommendation from
11037 SIO_IDEAL_SEND_BACKLOG_QUERY. Closes ticket 22798. Patch
11040 o Major features (relay):
11041 - Implement an option, ReducedExitPolicy, to allow an Tor exit relay
11042 operator to use a more reasonable ("reduced") exit policy, rather
11043 than the default one. If you want to run an exit node without
11044 thinking too hard about which ports to allow, this one is for you.
11045 Closes ticket 13605. Patch from Neel Chauhan.
11047 o Minor features (testing, debugging, embedding):
11048 - For development purposes, Tor now has a mode in which it runs for
11049 a few seconds, then stops, and starts again without exiting the
11050 process. This mode is meant to help us debug various issues with
11051 ticket 23847. To use this feature, compile with
11052 --enable-restart-debugging, and set the TOR_DEBUG_RESTART
11053 environment variable. This is expected to crash a lot, and is
11054 really meant for developers only. It will likely be removed in a
11055 future release. Implements ticket 24583.
11057 o Minor bugfix (network IPv6 test):
11058 - Tor's test scripts now check if "ping -6 ::1" works when the user
11059 runs "make test-network-all". Fixes bug 24677; bugfix on
11060 0.2.9.3-alpha. Patch by "ffmancera".
11062 o Minor bugfixes (build, rust):
11063 - Fix output of autoconf checks to display success messages for Rust
11064 dependencies and a suitable rustc compiler version. Fixes bug
11065 24612; bugfix on 0.3.1.3-alpha.
11066 - When building with Rust on OSX, link against libresolv, to work
11067 around the issue at https://github.com/rust-lang/rust/issues/46797.
11068 Fixes bug 24652; bugfix on 0.3.1.1-alpha.
11069 - Don't pass the --quiet option to cargo: it seems to suppress some
11070 errors, which is not what we want to do when building. Fixes bug
11071 24518; bugfix on 0.3.1.7.
11072 - Build correctly when building from outside Tor's source tree with
11073 the TOR_RUST_DEPENDENCIES option set. Fixes bug 22768; bugfix
11076 o Minor bugfixes (directory authorities, IPv6):
11077 - When creating a routerstatus (vote) from a routerinfo (descriptor),
11078 set the IPv6 address to the unspecified IPv6 address, and
11079 explicitly initialize the port to zero. Fixes bug 24488; bugfix
11082 o Minor bugfixes (fallback directory mirrors):
11083 - Make updateFallbackDirs.py search harder for python. (Some OSs
11084 don't put it in /usr/bin.) Fixes bug 24708; bugfix
11087 o Minor bugfixes (hibernation, bandwidth accounting, shutdown):
11088 - When hibernating, close connections normally and allow them to
11089 flush. Fixes bug 23571; bugfix on 0.2.4.7-alpha. Also fixes
11091 - Do not attempt to launch self-reachability tests when entering
11092 hibernation. Fixes a case of bug 12062; bugfix on 0.0.9pre5.
11093 - Resolve several bugs related to descriptor fetching on bridge
11094 clients with bandwidth accounting enabled. (This combination is
11095 not recommended!) Fixes a case of bug 12062; bugfix
11097 - When hibernating, do not attempt to launch DNS checks. Fixes a
11098 case of bug 12062; bugfix on 0.1.2.2-alpha.
11099 - When hibernating, do not try to upload or download descriptors.
11100 Fixes a case of bug 12062; bugfix on 0.0.9pre5.
11102 o Minor bugfixes (IPv6, bridges):
11103 - Tor now always sets IPv6 preferences for bridges. Fixes bug 24573;
11104 bugfix on 0.2.8.2-alpha.
11105 - Tor now sets IPv6 address in the routerstatus as well as in the
11106 router descriptors when updating addresses for a bridge. Closes
11107 ticket 24572; bugfix on 0.2.4.5-alpha. Patch by "ffmancera".
11109 o Minor bugfixes (linux seccomp2 sandbox):
11110 - When running with the sandbox enabled, reload configuration files
11111 correctly even when %include was used. Previously we would crash.
11112 Fixes bug 22605; bugfix on 0.3.1. Patch from Daniel Pinto.
11114 o Minor bugfixes (memory leaks):
11115 - Avoid possible at-exit memory leaks related to use of Libevent's
11116 event_base_once() function. (This function tends to leak memory if
11117 the event_base is closed before the event fires.) Fixes bug 24584;
11118 bugfix on 0.2.8.1-alpha.
11119 - Fix a harmless memory leak in tor-resolve. Fixes bug 24582; bugfix
11122 o Minor bugfixes (OSX):
11123 - Don't exit the Tor process if setrlimit() fails to change the file
11124 limit (which can happen sometimes on some versions of OSX). Fixes
11125 bug 21074; bugfix on 0.0.9pre5.
11127 o Minor bugfixes (performance, fragile-hardening):
11128 - Improve the performance of our consensus-diff application code
11129 when Tor is built with the --enable-fragile-hardening option set.
11130 Fixes bug 24826; bugfix on 0.3.1.1-alpha.
11132 o Minor bugfixes (performance, timeouts):
11133 - Consider circuits for timeout as soon as they complete a hop. This
11134 is more accurate than applying the timeout in
11135 circuit_expire_building() because that function is only called
11136 once per second, which is now too slow for typical timeouts on the
11137 current network. Fixes bug 23114; bugfix on 0.2.2.2-alpha.
11138 - Use onion service circuits (and other circuits longer than 3 hops)
11139 to calculate a circuit build timeout. Previously, Tor only
11140 calculated its build timeout based on circuits that planned to be
11141 exactly 3 hops long. With this change, we include measurements
11142 from all circuits at the point where they complete their third
11143 hop. Fixes bug 23100; bugfix on 0.2.2.2-alpha.
11145 o Minor bugfixes (testing):
11146 - Give out Exit flags in bootstrapping networks. Fixes bug 24137;
11147 bugfix on 0.2.3.1-alpha.
11148 - Fix a memory leak in the scheduler/loop_kist unit test. Fixes bug
11149 25005; bugfix on 0.3.2.7-rc.
11151 o Code simplification and refactoring:
11152 - Remove /usr/athena from search path in configure.ac. Closes
11154 - Remove duplicate code in node_has_curve25519_onion_key() and
11155 node_get_curve25519_onion_key(), and add a check for a zero
11156 microdesc curve25519 onion key. Closes ticket 23966, patch by
11157 "aruna1234" and teor.
11158 - Rewrite channel_rsa_id_group_set_badness to reduce temporary
11159 memory allocations with large numbers of OR connections (e.g.
11160 relays). Closes ticket 24119.
11161 - Separate the function that deletes ephemeral files when Tor
11163 - Small changes to Tor's buf_t API to make it suitable for use as a
11164 general-purpose safe string constructor. Closes ticket 22342.
11165 - Switch -Wnormalized=id to -Wnormalized=nfkc in configure.ac to
11166 avoid source code identifier confusion. Closes ticket 24467.
11167 - The tor_git_revision[] constant no longer needs to be redeclared
11168 by everything that links against the rest of Tor. Done as part of
11169 ticket 23845, to simplify our external API.
11170 - We make extend_info_from_node() use node_get_curve25519_onion_key()
11171 introduced in ticket 23577 to access the curve25519 public keys
11172 rather than accessing it directly. Closes ticket 23760. Patch by
11174 - Add a function to log channels' scheduler state changes to aid
11175 debugging efforts. Closes ticket 24531.
11178 - Add documentation on how to build tor with Rust dependencies
11179 without having to be online. Closes ticket 22907; bugfix
11181 - Clarify the behavior of RelayBandwidth{Rate,Burst} with client
11182 traffic. Closes ticket 24318.
11183 - Document that OutboundBindAddress doesn't apply to DNS requests.
11184 Closes ticket 22145. Patch from Aruna Maurya.
11185 - Document that operators who run more than one relay or bridge are
11186 expected to set MyFamily and ContactInfo correctly. Closes
11189 o Code simplification and refactoring (channels):
11190 - Remove the incoming and outgoing channel queues. These were never
11191 used, but still took up a step in our fast path.
11192 - The majority of the channel unit tests have been rewritten and the
11193 code coverage has now been raised to 83.6% for channel.c. Closes
11195 - Remove other dead code from the channel subsystem: All together,
11196 this cleanup has removed more than 1500 lines of code overall and
11197 adding very little except for unit test.
11199 o Code simplification and refactoring (circuit rendezvous):
11200 - Split the client-side rendezvous circuit lookup into two
11201 functions: one that returns only established circuits and another
11202 that returns all kinds of circuits. Closes ticket 23459.
11204 o Code simplification and refactoring (controller):
11205 - Make most of the variables in networkstatus_getinfo_by_purpose()
11206 const. Implements ticket 24489.
11209 Changes in version 0.3.2.9 - 2018-01-09
11210 Tor 0.3.2.9 is the first stable release in the 0.3.2 series.
11212 The 0.3.2 series includes our long-anticipated new onion service
11213 design, with numerous security features. (For more information, see
11214 our blog post at https://blog.torproject.org/fall-harvest.) We also
11215 have a new circuit scheduler algorithm for improved performance on
11216 relays everywhere (see https://blog.torproject.org/kist-and-tell),
11217 along with many smaller features and bugfixes.
11219 Per our stable release policy, we plan to support each stable release
11220 series for at least the next nine months, or for three months after
11221 the first stable release of the next series: whichever is longer. If
11222 you need a release with long-term support, we recommend that you stay
11223 with the 0.2.9 series.
11225 Below is a list of the changes since 0.3.2.8-rc. For a list of all
11226 changes since 0.3.1, see the ReleaseNotes file.
11228 o Minor features (fallback directory mirrors):
11229 - The fallback directory list has been re-generated based on the
11230 current status of the network. Tor uses fallback directories to
11231 bootstrap when it doesn't yet have up-to-date directory
11232 information. Closes ticket 24801.
11233 - Make the default DirAuthorityFallbackRate 0.1, so that clients
11234 prefer to bootstrap from fallback directory mirrors. This is a
11235 follow-up to 24679, which removed weights from the default
11236 fallbacks. Implements ticket 24681.
11238 o Minor features (geoip):
11239 - Update geoip and geoip6 to the January 5 2018 Maxmind GeoLite2
11242 o Minor bugfixes (address selection):
11243 - When the fascist_firewall_choose_address_ functions don't find a
11244 reachable address, set the returned address to the null address
11245 and port. This is a precautionary measure, because some callers do
11246 not check the return value. Fixes bug 24736; bugfix
11249 o Minor bugfixes (compilation):
11250 - Resolve a few shadowed-variable warnings in the onion service
11251 code. Fixes bug 24634; bugfix on 0.3.2.1-alpha.
11253 o Minor bugfixes (portability, msvc):
11254 - Fix a bug in the bit-counting parts of our timing-wheel code on
11255 MSVC. (Note that MSVC is still not a supported build platform, due
11256 to cryptographic timing channel risks.) Fixes bug 24633; bugfix
11260 Changes in version 0.3.2.8-rc - 2017-12-21
11261 Tor 0.3.2.8-rc fixes a pair of bugs in the KIST and KISTLite
11262 schedulers that had led servers under heavy load to overload their
11263 outgoing connections. All relay operators running earlier 0.3.2.x
11264 versions should upgrade. This version also includes a mitigation for
11265 over-full DESTROY queues leading to out-of-memory conditions: if it
11266 works, we will soon backport it to earlier release series.
11268 This is the second release candidate in the 0.3.2 series. If we find
11269 no new bugs or regression here, then the first stable 0.3.2 release
11270 will be nearly identical to this.
11272 o Major bugfixes (KIST, scheduler):
11273 - The KIST scheduler did not correctly account for data already
11274 enqueued in each connection's send socket buffer, particularly in
11275 cases when the TCP/IP congestion window was reduced between
11276 scheduler calls. This situation lead to excessive per-connection
11277 buffering in the kernel, and a potential memory DoS. Fixes bug
11278 24665; bugfix on 0.3.2.1-alpha.
11280 o Minor features (geoip):
11281 - Update geoip and geoip6 to the December 6 2017 Maxmind GeoLite2
11284 o Minor bugfixes (hidden service v3):
11285 - Bump hsdir_spread_store parameter from 3 to 4 in order to increase
11286 the probability of reaching a service for a client missing
11287 microdescriptors. Fixes bug 24425; bugfix on 0.3.2.1-alpha.
11289 o Minor bugfixes (memory usage):
11290 - When queuing DESTROY cells on a channel, only queue the circuit-id
11291 and reason fields: not the entire 514-byte cell. This fix should
11292 help mitigate any bugs or attacks that fill up these queues, and
11293 free more RAM for other uses. Fixes bug 24666; bugfix
11296 o Minor bugfixes (scheduler, KIST):
11297 - Use a sane write limit for KISTLite when writing onto a connection
11298 buffer instead of using INT_MAX and shoving as much as it can.
11299 Because the OOM handler cleans up circuit queues, we are better
11300 off at keeping them in that queue instead of the connection's
11301 buffer. Fixes bug 24671; bugfix on 0.3.2.1-alpha.
11304 Changes in version 0.3.2.7-rc - 2017-12-14
11305 Tor 0.3.2.7-rc fixes various bugs in earlier versions of Tor,
11306 including some that could affect reliability or correctness.
11308 This is the first release candidate in the 0.3.2 series. If we find no
11309 new bugs or regression here, then the first stable 0.3.2. release will
11310 be nearly identical to this.
11312 o Major bugfixes (circuit prediction):
11313 - Fix circuit prediction logic so that a client doesn't treat a port
11314 as being "handled" by a circuit if that circuit already has
11315 isolation settings on it. This change should make Tor clients more
11316 responsive by improving their chances of having a pre-created
11317 circuit ready for use when a request arrives. Fixes bug 18859;
11318 bugfix on 0.2.3.3-alpha.
11320 o Minor features (logging):
11321 - Provide better warnings when the getrandom() syscall fails. Closes
11324 o Minor features (portability):
11325 - Tor now compiles correctly on arm64 with libseccomp-dev installed.
11326 (It doesn't yet work with the sandbox enabled.) Closes
11329 o Minor bugfixes (bridge clients, bootstrap):
11330 - Retry directory downloads when we get our first bridge descriptor
11331 during bootstrap or while reconnecting to the network. Keep
11332 retrying every time we get a bridge descriptor, until we have a
11333 reachable bridge. Fixes part of bug 24367; bugfix on 0.2.0.3-alpha.
11334 - Stop delaying bridge descriptor fetches when we have cached bridge
11335 descriptors. Instead, only delay bridge descriptor fetches when we
11336 have at least one reachable bridge. Fixes part of bug 24367;
11337 bugfix on 0.2.0.3-alpha.
11338 - Stop delaying directory fetches when we have cached bridge
11339 descriptors. Instead, only delay bridge descriptor fetches when
11340 all our bridges are definitely unreachable. Fixes part of bug
11341 24367; bugfix on 0.2.0.3-alpha.
11343 o Minor bugfixes (compilation):
11344 - Fix a signed/unsigned comparison warning introduced by our fix to
11345 TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
11347 o Minor bugfixes (correctness):
11348 - Fix several places in our codebase where a C compiler would be
11349 likely to eliminate a check, based on assuming that undefined
11350 behavior had not happened elsewhere in the code. These cases are
11351 usually a sign of redundant checking or dubious arithmetic. Found
11352 by Georg Koppen using the "STACK" tool from Wang, Zeldovich,
11353 Kaashoek, and Solar-Lezama. Fixes bug 24423; bugfix on various
11356 o Minor bugfixes (onion service v3):
11357 - Fix a race where an onion service would launch a new intro circuit
11358 after closing an old one, but fail to register it before freeing
11359 the previously closed circuit. This bug was making the service
11360 unable to find the established intro circuit and thus not upload
11361 its descriptor, thus making a service unavailable for up to 24
11362 hours. Fixes bug 23603; bugfix on 0.3.2.1-alpha.
11364 o Minor bugfixes (scheduler, KIST):
11365 - Properly set the scheduler state of an unopened channel in the
11366 KIST scheduler main loop. This prevents a harmless but annoying
11367 log warning. Fixes bug 24502; bugfix on 0.3.2.4-alpha.
11368 - Avoid a possible integer overflow when computing the available
11369 space on the TCP buffer of a channel. This had no security
11370 implications; but could make KIST allow too many cells on a
11371 saturated connection. Fixes bug 24590; bugfix on 0.3.2.1-alpha.
11372 - Downgrade to "info" a harmless warning about the monotonic time
11373 moving backwards: This can happen on platform not supporting
11374 monotonic time. Fixes bug 23696; bugfix on 0.3.2.1-alpha.
11377 Changes in version 0.3.2.6-alpha - 2017-12-01
11378 This version of Tor is the latest in the 0.3.2 alpha series. It
11379 includes fixes for several important security issues. All Tor users
11380 should upgrade to this release, or to one of the other releases coming
11383 o Major bugfixes (security):
11384 - Fix a denial of service bug where an attacker could use a
11385 malformed directory object to cause a Tor instance to pause while
11386 OpenSSL would try to read a passphrase from the terminal. (Tor
11387 instances run without a terminal, which is the case for most Tor
11388 packages, are not impacted.) Fixes bug 24246; bugfix on every
11389 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
11390 Found by OSS-Fuzz as testcase 6360145429790720.
11391 - Fix a denial of service issue where an attacker could crash a
11392 directory authority using a malformed router descriptor. Fixes bug
11393 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
11395 - When checking for replays in the INTRODUCE1 cell data for a
11396 (legacy) onion service, correctly detect replays in the RSA-
11397 encrypted part of the cell. We were previously checking for
11398 replays on the entire cell, but those can be circumvented due to
11399 the malleability of Tor's legacy hybrid encryption. This fix helps
11400 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
11401 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
11404 o Major bugfixes (security, onion service v2):
11405 - Fix a use-after-free error that could crash v2 Tor onion services
11406 when they failed to open circuits while expiring introduction
11407 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
11408 also tracked as TROVE-2017-013 and CVE-2017-8823.
11410 o Major bugfixes (security, relay):
11411 - When running as a relay, make sure that we never build a path
11412 through ourselves, even in the case where we have somehow lost the
11413 version of our descriptor appearing in the consensus. Fixes part
11414 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
11415 as TROVE-2017-012 and CVE-2017-8822.
11416 - When running as a relay, make sure that we never choose ourselves
11417 as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
11418 issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
11420 o Minor feature (relay statistics):
11421 - Change relay bandwidth reporting stats interval from 4 hours to 24
11422 hours in order to reduce the efficiency of guard discovery
11423 attacks. Fixes ticket 23856.
11425 o Minor features (directory authority):
11426 - Add an IPv6 address for the "bastet" directory authority. Closes
11429 o Minor bugfixes (client):
11430 - By default, do not enable storage of client-side DNS values. These
11431 values were unused by default previously, but they should not have
11432 been cached at all. Fixes bug 24050; bugfix on 0.2.6.3-alpha.
11435 Changes in version 0.3.1.9 - 2017-12-01:
11436 Tor 0.3.1.9 backports important security and stability fixes from the
11437 0.3.2 development series. All Tor users should upgrade to this
11438 release, or to another of the releases coming out today.
11440 o Major bugfixes (security, backport from 0.3.2.6-alpha):
11441 - Fix a denial of service bug where an attacker could use a
11442 malformed directory object to cause a Tor instance to pause while
11443 OpenSSL would try to read a passphrase from the terminal. (Tor
11444 instances run without a terminal, which is the case for most Tor
11445 packages, are not impacted.) Fixes bug 24246; bugfix on every
11446 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
11447 Found by OSS-Fuzz as testcase 6360145429790720.
11448 - Fix a denial of service issue where an attacker could crash a
11449 directory authority using a malformed router descriptor. Fixes bug
11450 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
11452 - When checking for replays in the INTRODUCE1 cell data for a
11453 (legacy) onion service, correctly detect replays in the RSA-
11454 encrypted part of the cell. We were previously checking for
11455 replays on the entire cell, but those can be circumvented due to
11456 the malleability of Tor's legacy hybrid encryption. This fix helps
11457 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
11458 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
11461 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
11462 - Fix a use-after-free error that could crash v2 Tor onion services
11463 when they failed to open circuits while expiring introduction
11464 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
11465 also tracked as TROVE-2017-013 and CVE-2017-8823.
11467 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
11468 - When running as a relay, make sure that we never build a path
11469 through ourselves, even in the case where we have somehow lost the
11470 version of our descriptor appearing in the consensus. Fixes part
11471 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
11472 as TROVE-2017-012 and CVE-2017-8822.
11473 - When running as a relay, make sure that we never choose ourselves
11474 as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
11475 issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
11477 o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
11478 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
11479 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
11480 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
11481 identifying and finding a workaround to this bug and to Moritz,
11482 Arthur Edelstein, and Roger for helping to track it down and
11485 o Minor features (bridge):
11486 - Bridges now include notice in their descriptors that they are
11487 bridges, and notice of their distribution status, based on their
11488 publication settings. Implements ticket 18329. For more fine-
11489 grained control of how a bridge is distributed, upgrade to 0.3.2.x
11492 o Minor features (directory authority, backport from 0.3.2.6-alpha):
11493 - Add an IPv6 address for the "bastet" directory authority. Closes
11496 o Minor features (geoip):
11497 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
11500 o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
11501 - Avoid unnecessary calls to directory_fetches_from_authorities() on
11502 relays, to prevent spurious address resolutions and descriptor
11503 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
11504 bugfix on in 0.2.8.1-alpha.
11506 o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
11507 - Fix unused variable warnings in donna's Curve25519 SSE2 code.
11508 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
11510 o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
11511 - When a circuit is marked for close, do not attempt to package any
11512 cells for channels on that circuit. Previously, we would detect
11513 this condition lower in the call stack, when we noticed that the
11514 circuit had no attached channel, and log an annoying message.
11515 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
11517 o Minor bugfixes (onion service, backport from 0.3.2.5-alpha):
11518 - Rename the consensus parameter "hsdir-interval" to "hsdir_interval"
11519 so it matches dir-spec.txt. Fixes bug 24262; bugfix
11522 o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
11523 - Avoid a crash when transitioning from client mode to bridge mode.
11524 Previously, we would launch the worker threads whenever our
11525 "public server" mode changed, but not when our "server" mode
11526 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
11529 Changes in version 0.3.0.13 - 2017-12-01
11530 Tor 0.3.0.13 backports important security and stability bugfixes from
11531 later Tor releases. All Tor users should upgrade to this release, or
11532 to another of the releases coming out today.
11534 Note: the Tor 0.3.0 series will no longer be supported after 26 Jan
11535 2018. If you need a release with long-term support, please stick with
11536 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
11538 o Major bugfixes (security, backport from 0.3.2.6-alpha):
11539 - Fix a denial of service bug where an attacker could use a
11540 malformed directory object to cause a Tor instance to pause while
11541 OpenSSL would try to read a passphrase from the terminal. (Tor
11542 instances run without a terminal, which is the case for most Tor
11543 packages, are not impacted.) Fixes bug 24246; bugfix on every
11544 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
11545 Found by OSS-Fuzz as testcase 6360145429790720.
11546 - Fix a denial of service issue where an attacker could crash a
11547 directory authority using a malformed router descriptor. Fixes bug
11548 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
11550 - When checking for replays in the INTRODUCE1 cell data for a
11551 (legacy) onion service, correctly detect replays in the RSA-
11552 encrypted part of the cell. We were previously checking for
11553 replays on the entire cell, but those can be circumvented due to
11554 the malleability of Tor's legacy hybrid encryption. This fix helps
11555 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
11556 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
11559 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
11560 - Fix a use-after-free error that could crash v2 Tor onion services
11561 when they failed to open circuits while expiring introduction
11562 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
11563 also tracked as TROVE-2017-013 and CVE-2017-8823.
11565 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
11566 - When running as a relay, make sure that we never build a path
11567 through ourselves, even in the case where we have somehow lost the
11568 version of our descriptor appearing in the consensus. Fixes part
11569 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
11570 as TROVE-2017-012 and CVE-2017-8822.
11571 - When running as a relay, make sure that we never choose ourselves
11572 as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
11573 issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
11575 o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
11576 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
11577 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
11578 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
11579 identifying and finding a workaround to this bug and to Moritz,
11580 Arthur Edelstein, and Roger for helping to track it down and
11583 o Minor features (security, windows, backport from 0.3.1.1-alpha):
11584 - Enable a couple of pieces of Windows hardening: one
11585 (HeapEnableTerminationOnCorruption) that has been on-by-default
11586 since Windows 8, and unavailable before Windows 7; and one
11587 (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
11588 affect us, but shouldn't do any harm. Closes ticket 21953.
11590 o Minor features (bridge, backport from 0.3.1.9):
11591 - Bridges now include notice in their descriptors that they are
11592 bridges, and notice of their distribution status, based on their
11593 publication settings. Implements ticket 18329. For more fine-
11594 grained control of how a bridge is distributed, upgrade to 0.3.2.x
11597 o Minor features (directory authority, backport from 0.3.2.6-alpha):
11598 - Add an IPv6 address for the "bastet" directory authority. Closes
11601 o Minor features (geoip):
11602 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
11605 o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
11606 - Avoid unnecessary calls to directory_fetches_from_authorities() on
11607 relays, to prevent spurious address resolutions and descriptor
11608 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
11609 bugfix on in 0.2.8.1-alpha.
11611 o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
11612 - Fix unused variable warnings in donna's Curve25519 SSE2 code.
11613 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
11615 o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
11616 - When a circuit is marked for close, do not attempt to package any
11617 cells for channels on that circuit. Previously, we would detect
11618 this condition lower in the call stack, when we noticed that the
11619 circuit had no attached channel, and log an annoying message.
11620 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
11622 o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
11623 - Avoid a crash when transitioning from client mode to bridge mode.
11624 Previously, we would launch the worker threads whenever our
11625 "public server" mode changed, but not when our "server" mode
11626 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
11628 o Minor bugfixes (testing, backport from 0.3.1.6-rc):
11629 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
11630 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
11633 Changes in version 0.2.9.14 - 2017-12-01
11634 Tor 0.3.0.13 backports important security and stability bugfixes from
11635 later Tor releases. All Tor users should upgrade to this release, or
11636 to another of the releases coming out today.
11638 o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
11639 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
11640 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
11641 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
11642 identifying and finding a workaround to this bug and to Moritz,
11643 Arthur Edelstein, and Roger for helping to track it down and
11646 o Major bugfixes (security, backport from 0.3.2.6-alpha):
11647 - Fix a denial of service bug where an attacker could use a
11648 malformed directory object to cause a Tor instance to pause while
11649 OpenSSL would try to read a passphrase from the terminal. (Tor
11650 instances run without a terminal, which is the case for most Tor
11651 packages, are not impacted.) Fixes bug 24246; bugfix on every
11652 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
11653 Found by OSS-Fuzz as testcase 6360145429790720.
11654 - Fix a denial of service issue where an attacker could crash a
11655 directory authority using a malformed router descriptor. Fixes bug
11656 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
11658 - When checking for replays in the INTRODUCE1 cell data for a
11659 (legacy) onion service, correctly detect replays in the RSA-
11660 encrypted part of the cell. We were previously checking for
11661 replays on the entire cell, but those can be circumvented due to
11662 the malleability of Tor's legacy hybrid encryption. This fix helps
11663 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
11664 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
11667 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
11668 - Fix a use-after-free error that could crash v2 Tor onion services
11669 when they failed to open circuits while expiring introduction
11670 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
11671 also tracked as TROVE-2017-013 and CVE-2017-8823.
11673 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
11674 - When running as a relay, make sure that we never build a path
11675 through ourselves, even in the case where we have somehow lost the
11676 version of our descriptor appearing in the consensus. Fixes part
11677 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
11678 as TROVE-2017-012 and CVE-2017-8822.
11680 o Minor features (bridge, backport from 0.3.1.9):
11681 - Bridges now include notice in their descriptors that they are
11682 bridges, and notice of their distribution status, based on their
11683 publication settings. Implements ticket 18329. For more fine-
11684 grained control of how a bridge is distributed, upgrade to 0.3.2.x
11687 o Minor features (directory authority, backport from 0.3.2.6-alpha):
11688 - Add an IPv6 address for the "bastet" directory authority. Closes
11691 o Minor features (geoip):
11692 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
11695 o Minor features (security, windows, backport from 0.3.1.1-alpha):
11696 - Enable a couple of pieces of Windows hardening: one
11697 (HeapEnableTerminationOnCorruption) that has been on-by-default
11698 since Windows 8, and unavailable before Windows 7; and one
11699 (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
11700 affect us, but shouldn't do any harm. Closes ticket 21953.
11702 o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
11703 - Avoid unnecessary calls to directory_fetches_from_authorities() on
11704 relays, to prevent spurious address resolutions and descriptor
11705 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
11706 bugfix on in 0.2.8.1-alpha.
11708 o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
11709 - Fix unused variable warnings in donna's Curve25519 SSE2 code.
11710 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
11712 o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
11713 - When a circuit is marked for close, do not attempt to package any
11714 cells for channels on that circuit. Previously, we would detect
11715 this condition lower in the call stack, when we noticed that the
11716 circuit had no attached channel, and log an annoying message.
11717 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
11719 o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
11720 - Avoid a crash when transitioning from client mode to bridge mode.
11721 Previously, we would launch the worker threads whenever our
11722 "public server" mode changed, but not when our "server" mode
11723 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
11725 o Minor bugfixes (testing, backport from 0.3.1.6-rc):
11726 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
11727 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
11730 Changes in version 0.2.8.17 - 2017-12-01
11731 Tor 0.2.8.17 backports important security and stability bugfixes from
11732 later Tor releases. All Tor users should upgrade to this release, or
11733 to another of the releases coming out today.
11735 Note: the Tor 0.2.8 series will no longer be supported after 1 Jan
11736 2018. If you need a release with long-term support, please upgrade with
11737 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
11739 o Major bugfixes (security, backport from 0.3.2.6-alpha):
11740 - Fix a denial of service bug where an attacker could use a
11741 malformed directory object to cause a Tor instance to pause while
11742 OpenSSL would try to read a passphrase from the terminal. (Tor
11743 instances run without a terminal, which is the case for most Tor
11744 packages, are not impacted.) Fixes bug 24246; bugfix on every
11745 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
11746 Found by OSS-Fuzz as testcase 6360145429790720.
11747 - When checking for replays in the INTRODUCE1 cell data for a
11748 (legacy) onion service, correctly detect replays in the RSA-
11749 encrypted part of the cell. We were previously checking for
11750 replays on the entire cell, but those can be circumvented due to
11751 the malleability of Tor's legacy hybrid encryption. This fix helps
11752 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
11753 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
11756 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
11757 - Fix a use-after-free error that could crash v2 Tor onion services
11758 when they failed to open circuits while expiring introduction
11759 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
11760 also tracked as TROVE-2017-013 and CVE-2017-8823.
11762 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
11763 - When running as a relay, make sure that we never build a path through
11764 ourselves, even in the case where we have somehow lost the version of
11765 our descriptor appearing in the consensus. Fixes part of bug 21534;
11766 bugfix on 0.2.0.1-alpha. This issue is also tracked as TROVE-2017-012
11769 o Minor features (bridge, backport from 0.3.1.9):
11770 - Bridges now include notice in their descriptors that they are
11771 bridges, and notice of their distribution status, based on their
11772 publication settings. Implements ticket 18329. For more fine-
11773 grained control of how a bridge is distributed, upgrade to 0.3.2.x
11776 o Minor features (directory authority, backport from 0.3.2.6-alpha):
11777 - Add an IPv6 address for the "bastet" directory authority. Closes
11780 o Minor features (geoip):
11781 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
11784 o Minor bugfixes (testing, backport from 0.3.1.6-rc):
11785 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
11786 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
11789 Changes in version 0.2.5.16 - 2017-12-01
11790 Tor 0.2.5.13 backports important security and stability bugfixes from
11791 later Tor releases. All Tor users should upgrade to this release, or
11792 to another of the releases coming out today.
11794 Note: the Tor 0.2.5 series will no longer be supported after 1 May
11795 2018. If you need a release with long-term support, please upgrade to
11796 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
11798 o Major bugfixes (security, backport from 0.3.2.6-alpha):
11799 - Fix a denial of service bug where an attacker could use a
11800 malformed directory object to cause a Tor instance to pause while
11801 OpenSSL would try to read a passphrase from the terminal. (Tor
11802 instances run without a terminal, which is the case for most Tor
11803 packages, are not impacted.) Fixes bug 24246; bugfix on every
11804 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
11805 Found by OSS-Fuzz as testcase 6360145429790720.
11806 - When checking for replays in the INTRODUCE1 cell data for a
11807 (legacy) onion service, correctly detect replays in the RSA-
11808 encrypted part of the cell. We were previously checking for
11809 replays on the entire cell, but those can be circumvented due to
11810 the malleability of Tor's legacy hybrid encryption. This fix helps
11811 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
11812 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
11815 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
11816 - When running as a relay, make sure that we never build a path
11817 through ourselves, even in the case where we have somehow lost the
11818 version of our descriptor appearing in the consensus. Fixes part
11819 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
11820 as TROVE-2017-012 and CVE-2017-8822.
11822 o Minor features (bridge, backport from 0.3.1.9):
11823 - Bridges now include notice in their descriptors that they are
11824 bridges, and notice of their distribution status, based on their
11825 publication settings. Implements ticket 18329. For more fine-
11826 grained control of how a bridge is distributed, upgrade to 0.3.2.x
11829 o Minor features (geoip):
11830 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
11834 Changes in version 0.3.2.5-alpha - 2017-11-22
11835 Tor 0.3.2.5-alpha is the fifth alpha release in the 0.3.2.x series. It
11836 fixes several stability and reliability bugs, including a fix for
11837 intermittent bootstrapping failures that some people have been seeing
11838 since the 0.3.0.x series.
11840 Please test this alpha out -- many of these fixes will soon be
11841 backported to stable Tor versions if no additional bugs are found
11844 o Major bugfixes (bootstrapping):
11845 - Fetch descriptors aggressively whenever we lack enough to build
11846 circuits, regardless of how many descriptors we are missing.
11847 Previously, we would delay launching the fetch when we had fewer
11848 than 15 missing descriptors, even if some of those descriptors
11849 were blocking circuits from building. Fixes bug 23985; bugfix on
11850 0.1.1.11-alpha. The effects of this bug became worse in
11851 0.3.0.3-alpha, when we began treating missing descriptors from our
11852 primary guards as a reason to delay circuits.
11853 - Don't try fetching microdescriptors from relays that have failed
11854 to deliver them in the past. Fixes bug 23817; bugfix
11857 o Minor features (directory authority):
11858 - Make the "Exit" flag assignment only depend on whether the exit
11859 policy allows connections to ports 80 and 443. Previously relays
11860 would get the Exit flag if they allowed connections to one of
11861 these ports and also port 6667. Resolves ticket 23637.
11863 o Minor features (geoip):
11864 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
11867 o Minor features (linux seccomp2 sandbox):
11868 - Update the sandbox rules so that they should now work correctly
11869 with Glibc 2.26. Closes ticket 24315.
11871 o Minor features (logging):
11872 - Downgrade a pair of log messages that could occur when an exit's
11873 resolver gave us an unusual (but not forbidden) response. Closes
11875 - Improve the message we log when re-enabling circuit build timeouts
11876 after having received a consensus. Closes ticket 20963.
11878 o Minor bugfixes (compilation):
11879 - Fix a memory leak warning in one of the libevent-related
11880 configuration tests that could occur when manually specifying
11881 -fsanitize=address. Fixes bug 24279; bugfix on 0.3.0.2-alpha.
11882 Found and patched by Alex Xu.
11883 - When detecting OpenSSL on Windows from our configure script, make
11884 sure to try linking with the ws2_32 library. Fixes bug 23783;
11885 bugfix on 0.3.2.2-alpha.
11887 o Minor bugfixes (control port, linux seccomp2 sandbox):
11888 - Avoid a crash when attempting to use the seccomp2 sandbox together
11889 with the OwningControllerProcess feature. Fixes bug 24198; bugfix
11892 o Minor bugfixes (control port, onion services):
11893 - Report "FAILED" instead of "UPLOAD_FAILED" "FAILED" for the
11894 HS_DESC event when a service is not able to upload a descriptor.
11895 Fixes bug 24230; bugfix on 0.2.7.1-alpha.
11897 o Minor bugfixes (directory cache):
11898 - Recover better from empty or corrupt files in the consensus cache
11899 directory. Fixes bug 24099; bugfix on 0.3.1.1-alpha.
11900 - When a consensus diff calculation is only partially successful,
11901 only record the successful parts as having succeeded. Partial
11902 success can happen if (for example) one compression method fails
11903 but the others succeed. Previously we misrecorded all the
11904 calculations as having succeeded, which would later cause a
11905 nonfatal assertion failure. Fixes bug 24086; bugfix
11908 o Minor bugfixes (logging):
11909 - Only log once if we notice that KIST support is gone. Fixes bug
11910 24158; bugfix on 0.3.2.1-alpha.
11911 - Suppress a log notice when relay descriptors arrive. We already
11912 have a bootstrap progress for this so no need to log notice
11913 everytime tor receives relay descriptors. Microdescriptors behave
11914 the same. Fixes bug 23861; bugfix on 0.2.8.2-alpha.
11916 o Minor bugfixes (network layer):
11917 - When closing a connection via close_connection_immediately(), we
11918 mark it as "not blocked on bandwidth", to prevent later calls from
11919 trying to unblock it, and give it permission to read. This fixes a
11920 backtrace warning that can happen on relays under various
11921 circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
11923 o Minor bugfixes (onion services):
11924 - The introduction circuit was being timed out too quickly while
11925 waiting for the rendezvous circuit to complete. Keep the intro
11926 circuit around longer instead of timing out and reopening new ones
11927 constantly. Fixes bug 23681; bugfix on 0.2.4.8-alpha.
11928 - Rename the consensus parameter "hsdir-interval" to "hsdir_interval"
11929 so it matches dir-spec.txt. Fixes bug 24262; bugfix
11931 - Silence a warning about failed v3 onion descriptor uploads that
11932 can happen naturally under certain edge cases. Fixes part of bug
11933 23662; bugfix on 0.3.2.1-alpha.
11935 o Minor bugfixes (tests):
11936 - Fix a memory leak in one of the bridge-distribution test cases.
11937 Fixes bug 24345; bugfix on 0.3.2.3-alpha.
11938 - Fix a bug in our fuzzing mock replacement for crypto_pk_checksig(),
11939 to correctly handle cases where a caller gives it an RSA key of
11940 under 160 bits. (This is not actually a bug in Tor itself, but
11941 rather in our fuzzing code.) Fixes bug 24247; bugfix on
11942 0.3.0.3-alpha. Found by OSS-Fuzz as issue 4177.
11945 - Add notes in man page regarding OS support for the various
11946 scheduler types. Attempt to use less jargon in the scheduler
11947 section. Closes ticket 24254.
11950 Changes in version 0.3.2.4-alpha - 2017-11-08
11951 Tor 0.3.2.4-alpha is the fourth alpha release in the 0.3.2.x series.
11952 It fixes several stability and reliability bugs, especially including
11953 a major reliability issue that has been plaguing fast exit relays in
11956 o Major bugfixes (exit relays, DNS):
11957 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
11958 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
11959 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
11960 identifying and finding a workaround to this bug and to Moritz,
11961 Arthur Edelstein, and Roger for helping to track it down and
11964 o Major bugfixes (scheduler, channel):
11965 - Stop processing scheduled channels if they closed while flushing
11966 cells. This can happen if the write on the connection fails
11967 leading to the channel being closed while in the scheduler loop.
11968 Fixes bug 23751; bugfix on 0.3.2.1-alpha.
11970 o Minor features (logging, scheduler):
11971 - Introduce a SCHED_BUG() function to log extra information about
11972 the scheduler state if we ever catch a bug in the scheduler.
11973 Closes ticket 23753.
11975 o Minor features (removed deprecations):
11976 - The ClientDNSRejectInternalAddresses flag can once again be set in
11977 non-testing Tor networks, so long as they do not use the default
11978 directory authorities. This change also removes the deprecation of
11979 this flag from 0.2.9.2-alpha. Closes ticket 21031.
11981 o Minor features (testing):
11982 - Our fuzzing tests now test the encrypted portions of v3 onion
11983 service descriptors. Implements more of 21509.
11985 o Minor bugfixes (directory client):
11986 - On failure to download directory information, delay retry attempts
11987 by a random amount based on the "decorrelated jitter" algorithm.
11988 Our previous delay algorithm tended to produce extra-long delays
11989 too easily. Fixes bug 23816; bugfix on 0.2.9.1-alpha.
11991 o Minor bugfixes (IPv6, v3 single onion services):
11992 - Remove buggy code for IPv6-only v3 single onion services, and
11993 reject attempts to configure them. This release supports IPv4,
11994 dual-stack, and IPv6-only v3 onion services; and IPv4 and dual-
11995 stack v3 single onion services. Fixes bug 23820; bugfix
11998 o Minor bugfixes (logging, relay):
11999 - Give only a protocol warning when the ed25519 key is not
12000 consistent between the descriptor and microdescriptor of a relay.
12001 This can happen, for instance, if the relay has been flagged
12002 NoEdConsensus. Fixes bug 24025; bugfix on 0.3.2.1-alpha.
12004 o Minor bugfixes (manpage, onion service):
12005 - Document that the HiddenServiceNumIntroductionPoints option is
12006 0-10 for v2 services and 0-20 for v3 services. Fixes bug 24115;
12007 bugfix on 0.3.2.1-alpha.
12009 o Minor bugfixes (memory leaks):
12010 - Fix a minor memory leak at exit in the KIST scheduler. This bug
12011 should have no user-visible impact. Fixes bug 23774; bugfix
12013 - Fix a memory leak when decrypting a badly formatted v3 onion
12014 service descriptor. Fixes bug 24150; bugfix on 0.3.2.1-alpha.
12015 Found by OSS-Fuzz; this is OSS-Fuzz issue 3994.
12017 o Minor bugfixes (onion services):
12018 - Cache some needed onion service client information instead of
12019 constantly computing it over and over again. Fixes bug 23623;
12020 bugfix on 0.3.2.1-alpha.
12021 - Properly retry HSv3 descriptor fetches when missing required
12022 directory information. Fixes bug 23762; bugfix on 0.3.2.1-alpha.
12024 o Minor bugfixes (path selection):
12025 - When selecting relays by bandwidth, avoid a rounding error that
12026 could sometimes cause load to be imbalanced incorrectly.
12027 Previously, we would always round upwards; now, we round towards
12028 the nearest integer. This had the biggest effect when a relay's
12029 weight adjustments should have given it weight 0, but it got
12030 weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
12031 - When calculating the fraction of nodes that have descriptors, and
12032 all nodes in the network have zero bandwidths, count the number of
12033 nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
12034 - Actually log the total bandwidth in compute_weighted_bandwidths().
12035 Fixes bug 24170; bugfix on 0.2.4.3-alpha.
12037 o Minor bugfixes (relay, crash):
12038 - Avoid a crash when transitioning from client mode to bridge mode.
12039 Previously, we would launch the worker threads whenever our
12040 "public server" mode changed, but not when our "server" mode
12041 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
12043 o Minor bugfixes (testing):
12044 - Fix a spurious fuzzing-only use of an uninitialized value. Found
12045 by Brian Carpenter. Fixes bug 24082; bugfix on 0.3.0.3-alpha.
12046 - Test that IPv6-only clients can use microdescriptors when running
12047 "make test-network-all". Requires chutney master 61c28b9 or later.
12048 Closes ticket 24109.
12051 Changes in version 0.3.2.3-alpha - 2017-10-27
12052 Tor 0.3.2.3-alpha is the third release in the 0.3.2 series. It fixes
12053 numerous small bugs in earlier versions of 0.3.2.x, and adds a new
12054 directory authority, Bastet.
12056 o Directory authority changes:
12057 - Add "Bastet" as a ninth directory authority to the default list.
12058 Closes ticket 23910.
12059 - The directory authority "Longclaw" has changed its IP address.
12060 Closes ticket 23592.
12062 o Minor features (bridge):
12063 - Bridge relays can now set the BridgeDistribution config option to
12064 add a "bridge-distribution-request" line to their bridge
12065 descriptor, which tells BridgeDB how they'd like their bridge
12066 address to be given out. (Note that as of Oct 2017, BridgeDB does
12067 not yet implement this feature.) As a side benefit, this feature
12068 provides a way to distinguish bridge descriptors from non-bridge
12069 descriptors. Implements tickets 18329.
12071 o Minor features (client, entry guards):
12072 - Improve log messages when missing descriptors for primary guards.
12073 Resolves ticket 23670.
12075 o Minor features (geoip):
12076 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
12079 o Minor bugfixes (bridge):
12080 - Overwrite the bridge address earlier in the process of retrieving
12081 its descriptor, to make sure we reach it on the configured
12082 address. Fixes bug 20532; bugfix on 0.2.0.10-alpha.
12084 o Minor bugfixes (documentation):
12085 - Document better how to read gcov, and what our gcov postprocessing
12086 scripts do. Fixes bug 23739; bugfix on 0.2.9.1-alpha.
12088 o Minor bugfixes (entry guards):
12089 - Tor now updates its guard state when it reads a consensus
12090 regardless of whether it's missing descriptors. That makes tor use
12091 its primary guards to fetch descriptors in some edge cases where
12092 it would previously have used fallback directories. Fixes bug
12093 23862; bugfix on 0.3.0.1-alpha.
12095 o Minor bugfixes (hidden service client):
12096 - When handling multiple SOCKS request for the same .onion address,
12097 only fetch the service descriptor once.
12098 - When a descriptor fetch fails with a non-recoverable error, close
12099 all pending SOCKS requests for that .onion. Fixes bug 23653;
12100 bugfix on 0.3.2.1-alpha.
12102 o Minor bugfixes (hidden service):
12103 - Always regenerate missing hidden service public key files. Prior
12104 to this, if the public key was deleted from disk, it wouldn't get
12105 recreated. Fixes bug 23748; bugfix on 0.3.2.2-alpha. Patch
12107 - Make sure that we have a usable ed25519 key when the intro point
12108 relay supports ed25519 link authentication. Fixes bug 24002;
12109 bugfix on 0.3.2.1-alpha.
12111 o Minor bugfixes (hidden service, v2):
12112 - When reloading configured hidden services, copy all information
12113 from the old service object. Previously, some data was omitted,
12114 causing delays in descriptor upload, and other bugs. Fixes bug
12115 23790; bugfix on 0.2.1.9-alpha.
12117 o Minor bugfixes (memory safety, defensive programming):
12118 - Clear the target address when node_get_prim_orport() returns
12119 early. Fixes bug 23874; bugfix on 0.2.8.2-alpha.
12121 o Minor bugfixes (relay):
12122 - Avoid a BUG warning when receiving a dubious CREATE cell while an
12123 option transition is in progress. Fixes bug 23952; bugfix
12126 o Minor bugfixes (testing):
12127 - Adjust the GitLab CI configuration to more closely match that of
12128 Travis CI. Fixes bug 23757; bugfix on 0.3.2.2-alpha.
12129 - Prevent scripts/test/coverage from attempting to move gcov output
12130 to the root directory. Fixes bug 23741; bugfix on 0.2.5.1-alpha.
12131 - When running unit tests as root, skip a test that would fail
12132 because it expects a permissions error. This affects some
12133 continuous integration setups. Fixes bug 23758; bugfix
12135 - Stop unconditionally mirroring the tor repository in GitLab CI.
12136 This prevented developers from enabling GitLab CI on master. Fixes
12137 bug 23755; bugfix on 0.3.2.2-alpha.
12138 - Fix the hidden service v3 descriptor decoding fuzzing to use the
12139 latest decoding API correctly. Fixes bug 21509; bugfix
12142 o Minor bugfixes (warnings):
12143 - When we get an HTTP request on a SOCKS port, tell the user about
12144 the new HTTPTunnelPort option. Previously, we would give a "Tor is
12145 not an HTTP Proxy" message, which stopped being true when
12146 HTTPTunnelPort was introduced. Fixes bug 23678; bugfix
12150 Changes in version 0.2.5.15 - 2017-10-25
12151 Tor 0.2.5.15 backports a collection of bugfixes from later Tor release
12152 series. It also adds a new directory authority, Bastet.
12154 Note: the Tor 0.2.5 series will no longer be supported after 1 May
12155 2018. If you need a release with long-term support, please upgrade to
12156 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
12158 o Directory authority changes:
12159 - Add "Bastet" as a ninth directory authority to the default list.
12160 Closes ticket 23910.
12161 - The directory authority "Longclaw" has changed its IP address.
12162 Closes ticket 23592.
12164 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
12165 - Avoid an assertion failure bug affecting our implementation of
12166 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
12167 handling of "0xx" differs from what we had expected. Fixes bug
12168 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
12170 o Minor features (geoip):
12171 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
12174 o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
12175 - Fix a memset() off the end of an array when packing cells. This
12176 bug should be harmless in practice, since the corrupted bytes are
12177 still in the same structure, and are always padding bytes,
12178 ignored, or immediately overwritten, depending on compiler
12179 behavior. Nevertheless, because the memset()'s purpose is to make
12180 sure that any other cell-handling bugs can't expose bytes to the
12181 network, we need to fix it. Fixes bug 22737; bugfix on
12182 0.2.4.11-alpha. Fixes CID 1401591.
12184 o Build features (backport from 0.3.1.5-alpha):
12185 - Tor's repository now includes a Travis Continuous Integration (CI)
12186 configuration file (.travis.yml). This is meant to help new
12187 developers and contributors who fork Tor to a Github repository be
12188 better able to test their changes, and understand what we expect
12189 to pass. To use this new build feature, you must fork Tor to your
12190 Github account, then go into the "Integrations" menu in the
12191 repository settings for your fork and enable Travis, then push
12192 your changes. Closes ticket 22636.
12195 Changes in version 0.2.8.16 - 2017-10-25
12196 Tor 0.2.8.16 backports a collection of bugfixes from later Tor release
12197 series, including a bugfix for a crash issue that had affected relays
12198 under memory pressure. It also adds a new directory authority, Bastet.
12200 Note: the Tor 0.2.8 series will no longer be supported after 1 Jan
12201 2018. If you need a release with long-term support, please stick with
12202 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
12204 o Directory authority changes:
12205 - Add "Bastet" as a ninth directory authority to the default list.
12206 Closes ticket 23910.
12207 - The directory authority "Longclaw" has changed its IP address.
12208 Closes ticket 23592.
12210 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
12211 - Fix a timing-based assertion failure that could occur when the
12212 circuit out-of-memory handler freed a connection's output buffer.
12213 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
12215 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
12216 - Remove longclaw's IPv6 address, as it will soon change. Authority
12217 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
12218 3/8 directory authorities with IPv6 addresses, but there are also
12219 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
12221 o Minor features (geoip):
12222 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
12226 Changes in version 0.2.9.13 - 2017-10-25
12227 Tor 0.2.9.13 backports a collection of bugfixes from later Tor release
12228 series, including a bugfix for a crash issue that had affected relays
12229 under memory pressure. It also adds a new directory authority, Bastet.
12231 o Directory authority changes:
12232 - Add "Bastet" as a ninth directory authority to the default list.
12233 Closes ticket 23910.
12234 - The directory authority "Longclaw" has changed its IP address.
12235 Closes ticket 23592.
12237 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
12238 - Fix a timing-based assertion failure that could occur when the
12239 circuit out-of-memory handler freed a connection's output buffer.
12240 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
12242 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
12243 - Remove longclaw's IPv6 address, as it will soon change. Authority
12244 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
12245 3/8 directory authorities with IPv6 addresses, but there are also
12246 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
12248 o Minor features (geoip):
12249 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
12252 o Minor bugfixes (directory authority, backport from 0.3.1.5-alpha):
12253 - When a directory authority rejects a descriptor or extrainfo with
12254 a given digest, mark that digest as undownloadable, so that we do
12255 not attempt to download it again over and over. We previously
12256 tried to avoid downloading such descriptors by other means, but we
12257 didn't notice if we accidentally downloaded one anyway. This
12258 behavior became problematic in 0.2.7.2-alpha, when authorities
12259 began pinning Ed25519 keys. Fixes bug 22349; bugfix
12262 o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
12263 - Clear the address when node_get_prim_orport() returns early.
12264 Fixes bug 23874; bugfix on 0.2.8.2-alpha.
12266 o Minor bugfixes (Windows service, backport from 0.3.1.6-rc):
12267 - When running as a Windows service, set the ID of the main thread
12268 correctly. Failure to do so made us fail to send log messages to
12269 the controller in 0.2.1.16-rc, slowed down controller event
12270 delivery in 0.2.7.3-rc and later, and crash with an assertion
12271 failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
12272 Patch and diagnosis from "Vort".
12275 Changes in version 0.3.0.12 - 2017-10-25
12276 Tor 0.3.0.12 backports a collection of bugfixes from later Tor release
12277 series, including a bugfix for a crash issue that had affected relays
12278 under memory pressure. It also adds a new directory authority, Bastet.
12280 Note: the Tor 0.3.0 series will no longer be supported after 26 Jan
12281 2018. If you need a release with long-term support, please stick with
12282 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
12284 o Directory authority changes:
12285 - Add "Bastet" as a ninth directory authority to the default list.
12286 Closes ticket 23910.
12287 - The directory authority "Longclaw" has changed its IP address.
12288 Closes ticket 23592.
12290 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
12291 - Fix a timing-based assertion failure that could occur when the
12292 circuit out-of-memory handler freed a connection's output buffer.
12293 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
12295 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
12296 - Remove longclaw's IPv6 address, as it will soon change. Authority
12297 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
12298 3/8 directory authorities with IPv6 addresses, but there are also
12299 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
12301 o Minor features (geoip):
12302 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
12305 o Minor bugfixes (directory authority, backport from 0.3.1.5-alpha):
12306 - When a directory authority rejects a descriptor or extrainfo with
12307 a given digest, mark that digest as undownloadable, so that we do
12308 not attempt to download it again over and over. We previously
12309 tried to avoid downloading such descriptors by other means, but we
12310 didn't notice if we accidentally downloaded one anyway. This
12311 behavior became problematic in 0.2.7.2-alpha, when authorities
12312 began pinning Ed25519 keys. Fixes bug 22349; bugfix
12315 o Minor bugfixes (hidden service, relay, backport from 0.3.2.2-alpha):
12316 - Avoid a possible double close of a circuit by the intro point on
12317 error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
12318 bugfix on 0.3.0.1-alpha.
12320 o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
12321 - Clear the address when node_get_prim_orport() returns early.
12322 Fixes bug 23874; bugfix on 0.2.8.2-alpha.
12324 o Minor bugfixes (Windows service, backport from 0.3.1.6-rc):
12325 - When running as a Windows service, set the ID of the main thread
12326 correctly. Failure to do so made us fail to send log messages to
12327 the controller in 0.2.1.16-rc, slowed down controller event
12328 delivery in 0.2.7.3-rc and later, and crash with an assertion
12329 failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
12330 Patch and diagnosis from "Vort".
12333 Changes in version 0.3.1.8 - 2017-10-25
12334 Tor 0.3.1.8 is the second stable release in the 0.3.1 series.
12335 It includes several bugfixes, including a bugfix for a crash issue
12336 that had affected relays under memory pressure. It also adds
12337 a new directory authority, Bastet.
12339 o Directory authority changes:
12340 - Add "Bastet" as a ninth directory authority to the default list.
12341 Closes ticket 23910.
12342 - The directory authority "Longclaw" has changed its IP address.
12343 Closes ticket 23592.
12345 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
12346 - Fix a timing-based assertion failure that could occur when the
12347 circuit out-of-memory handler freed a connection's output buffer.
12348 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
12350 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
12351 - Remove longclaw's IPv6 address, as it will soon change. Authority
12352 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
12353 3/8 directory authorities with IPv6 addresses, but there are also
12354 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
12356 o Minor features (geoip):
12357 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
12360 o Minor bugfixes (compilation, backport from 0.3.2.2-alpha):
12361 - Fix a compilation warning when building with zstd support on
12362 32-bit platforms. Fixes bug 23568; bugfix on 0.3.1.1-alpha. Found
12363 and fixed by Andreas Stieger.
12365 o Minor bugfixes (compression, backport from 0.3.2.2-alpha):
12366 - Handle a pathological case when decompressing Zstandard data when
12367 the output buffer size is zero. Fixes bug 23551; bugfix
12370 o Minor bugfixes (directory authority, backport from 0.3.2.1-alpha):
12371 - Remove the length limit on HTTP status lines that authorities can
12372 send in their replies. Fixes bug 23499; bugfix on 0.3.1.6-rc.
12374 o Minor bugfixes (hidden service, relay, backport from 0.3.2.2-alpha):
12375 - Avoid a possible double close of a circuit by the intro point on
12376 error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
12377 bugfix on 0.3.0.1-alpha.
12379 o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
12380 - Clear the address when node_get_prim_orport() returns early.
12381 Fixes bug 23874; bugfix on 0.2.8.2-alpha.
12383 o Minor bugfixes (unit tests, backport from 0.3.2.2-alpha):
12384 - Fix additional channelpadding unit test failures by using mocked
12385 time instead of actual time for all tests. Fixes bug 23608; bugfix
12389 Changes in version 0.3.2.2-alpha - 2017-09-29
12390 Tor 0.3.2.2-alpha is the second release in the 0.3.2 series. This
12391 release fixes several minor bugs in the new scheduler and next-
12392 generation onion services; both features were newly added in the 0.3.2
12393 series. Other fixes in this alpha include several fixes for non-fatal
12394 tracebacks which would appear in logs.
12396 With the aim to stabilise the 0.3.2 series by 15 December 2017, this
12397 alpha does not contain any substantial new features. Minor features
12398 include better testing and logging.
12400 The following comprises the complete list of changes included
12403 o Major bugfixes (relay, crash, assertion failure):
12404 - Fix a timing-based assertion failure that could occur when the
12405 circuit out-of-memory handler freed a connection's output buffer.
12406 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
12408 o Major bugfixes (scheduler):
12409 - If a channel is put into the scheduler's pending list, then it
12410 starts closing, and then if the scheduler runs before it finishes
12411 closing, the scheduler will get stuck trying to flush its cells
12412 while the lower layers refuse to cooperate. Fix that race
12413 condition by giving the scheduler an escape method. Fixes bug
12414 23676; bugfix on 0.3.2.1-alpha.
12416 o Minor features (build, compilation):
12417 - The "check-changes" feature is now part of the "make check" tests;
12418 we'll use it to try to prevent misformed changes files from
12419 accumulating. Closes ticket 23564.
12420 - Tor builds should now fail if there are any mismatches between the
12421 C type representing a configuration variable and the C type the
12422 data-driven parser uses to store a value there. Previously, we
12423 needed to check these by hand, which sometimes led to mistakes.
12424 Closes ticket 23643.
12426 o Minor features (directory authorities):
12427 - Remove longclaw's IPv6 address, as it will soon change. Authority
12428 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
12429 3/8 directory authorities with IPv6 addresses, but there are also
12430 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
12432 o Minor features (hidden service, circuit, logging):
12433 - Improve logging of many callsite in the circuit subsystem to print
12434 the circuit identifier(s).
12435 - Log when we cleanup an intro point from a service so we know when
12436 and for what reason it happened. Closes ticket 23604.
12438 o Minor features (logging):
12439 - Log more circuit information whenever we are about to try to
12440 package a relay cell on a circuit with a nonexistent n_chan.
12441 Attempt to diagnose ticket 8185.
12442 - Improve info-level log identification of particular circuits, to
12443 help with debugging. Closes ticket 23645.
12445 o Minor features (relay):
12446 - When choosing which circuits can be expired as unused, consider
12447 circuits from clients even if those clients used regular CREATE
12448 cells to make them; and do not consider circuits from relays even
12449 if they were made with CREATE_FAST. Part of ticket 22805.
12451 o Minor features (robustness):
12452 - Change several fatal assertions when flushing buffers into non-
12453 fatal assertions, to prevent any recurrence of 23690.
12455 o Minor features (spec conformance, bridge, diagnostic):
12456 - When handling the USERADDR command on an ExtOrPort, warn when the
12457 transports provides a USERADDR with no port. In a future version,
12458 USERADDR commands of this format may be rejected. Detects problems
12459 related to ticket 23080.
12461 o Minor features (testing):
12462 - Add a unit test to make sure that our own generated platform
12463 string will be accepted by directory authorities. Closes
12466 o Minor bugfixes (bootstrapping):
12467 - When warning about state file clock skew, report the correct
12468 direction for the detected skew. Fixes bug 23606; bugfix
12470 - Avoid an assertion failure when logging a state file clock skew
12471 very early in bootstrapping. Fixes bug 23607; bugfix
12474 o Minor bugfixes (build, compilation):
12475 - Fix a compilation warning when building with zstd support on
12476 32-bit platforms. Fixes bug 23568; bugfix on 0.3.1.1-alpha. Found
12477 and fixed by Andreas Stieger.
12478 - When searching for OpenSSL, don't accept any OpenSSL library that
12479 lacks TLSv1_1_method(): Tor doesn't build with those versions.
12480 Additionally, look in /usr/local/opt/openssl, if it's present.
12481 These changes together repair the default build on OSX systems
12482 with Homebrew installed. Fixes bug 23602; bugfix on 0.2.7.2-alpha.
12484 o Minor bugfixes (compression):
12485 - Handle a pathological case when decompressing Zstandard data when
12486 the output buffer size is zero. Fixes bug 23551; bugfix
12489 o Minor bugfixes (documentation):
12490 - Fix manpage to not refer to the obsolete (and misspelled)
12491 UseEntryGuardsAsDirectoryGuards parameter in the description of
12492 NumDirectoryGuards. Fixes bug 23611; bugfix on 0.2.4.8-alpha.
12494 o Minor bugfixes (hidden service v3):
12495 - Don't log an assertion failure when we can't find the right
12496 information to extend to an introduction point. In rare cases,
12497 this could happen, causing a warning, even though tor would
12498 recover gracefully. Fixes bug 23159; bugfix on 0.3.2.1-alpha.
12499 - Pad RENDEZVOUS cell up to the size of the legacy cell which is
12500 much bigger so the rendezvous point can't distinguish which hidden
12501 service protocol is being used. Fixes bug 23420; bugfix
12504 o Minor bugfixes (hidden service, relay):
12505 - Avoid a possible double close of a circuit by the intro point on
12506 error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
12507 bugfix on 0.3.0.1-alpha.
12509 o Minor bugfixes (logging, relay shutdown, annoyance):
12510 - When a circuit is marked for close, do not attempt to package any
12511 cells for channels on that circuit. Previously, we would detect
12512 this condition lower in the call stack, when we noticed that the
12513 circuit had no attached channel, and log an annoying message.
12514 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
12516 o Minor bugfixes (scheduler):
12517 - When switching schedulers due to a consensus change, we didn't
12518 give the new scheduler a chance to react to the consensus. Fix
12519 that. Fixes bug 23537; bugfix on 0.3.2.1-alpha.
12520 - Make the KISTSchedRunInterval option a non negative value. With
12521 this, the way to disable KIST through the consensus is to set it
12522 to 0. Fixes bug 23539; bugfix on 0.3.2.1-alpha.
12523 - Only notice log the selected scheduler when we switch scheduler
12524 types. Fixes bug 23552; bugfix on 0.3.2.1-alpha.
12525 - Avoid a compilation warning on macOS in scheduler_ev_add() caused
12526 by a different tv_usec data type. Fixes bug 23575; bugfix
12528 - Make a hard exit if tor is unable to pick a scheduler which can
12529 happen if the user specifies a scheduler type that is not
12530 supported and not other types in Schedulers. Fixes bug 23581;
12531 bugfix on 0.3.2.1-alpha.
12532 - Properly initialize the scheduler last run time counter so it is
12533 not 0 at the first tick. Fixes bug 23696; bugfix on 0.3.2.1-alpha.
12535 o Minor bugfixes (testing):
12536 - Capture and detect several "Result does not fit" warnings in unit
12537 tests on platforms with 32-bit time_t. Fixes bug 21800; bugfix
12539 - Fix additional channelpadding unit test failures by using mocked
12540 time instead of actual time for all tests. Fixes bug 23608; bugfix
12542 - The removal of some old scheduler options caused some tests to
12543 fail on BSD systems. Assume current behavior is correct and make
12544 the tests pass again. Fixes bug 23566; bugfix on 0.3.2.1-alpha.
12546 o Code simplification and refactoring:
12547 - Remove various ways of testing circuits and connections for
12548 "clientness"; instead, favor channel_is_client(). Part of
12551 o Deprecated features:
12552 - The ReachableDirAddresses and ClientPreferIPv6DirPort options are
12553 now deprecated; they do not apply to relays, and they have had no
12554 effect on clients since 0.2.8.x. Closes ticket 19704.
12557 - HiddenServiceVersion man page entry wasn't mentioning the now
12558 supported version 3. Fixes ticket 23580; bugfix on 0.3.2.1-alpha.
12559 - Clarify that the Address option is entirely about setting an
12560 advertised IPv4 address. Closes ticket 18891.
12561 - Clarify the manpage's use of the term "address" to clarify what
12562 kind of address is intended. Closes ticket 21405.
12563 - Document that onion service subdomains are allowed, and ignored.
12564 Closes ticket 18736.
12567 Changes in version 0.3.2.1-alpha - 2017-09-18
12568 Tor 0.3.2.1-alpha is the first release in the 0.3.2.x series. It
12569 includes support for our next-generation ("v3") onion service
12570 protocol, and adds a new circuit scheduler for more responsive
12571 forwarding decisions from relays. There are also numerous other small
12572 features and bugfixes here.
12574 Below are the changes since Tor 0.3.1.7.
12576 o Major feature (scheduler, channel):
12577 - Tor now uses new schedulers to decide which circuits should
12578 deliver cells first, in order to improve congestion at relays. The
12579 first type is called "KIST" ("Kernel Informed Socket Transport"),
12580 and is only available on Linux-like systems: it uses feedback from
12581 the kernel to prevent the kernel's TCP buffers from growing too
12582 full. The second new scheduler type is called "KISTLite": it
12583 behaves the same as KIST, but runs on systems without kernel
12584 support for inspecting TCP implementation details. The old
12585 scheduler is still available, under the name "Vanilla". To change
12586 the default scheduler preference order, use the new "Schedulers"
12587 option. (The default preference order is "KIST,KISTLite,Vanilla".)
12589 Matt Traudt implemented KIST, based on research by Rob Jansen,
12590 John Geddes, Christ Wacek, Micah Sherr, and Paul Syverson. For
12591 more information, see the design paper at
12592 http://www.robgjansen.com/publications/kist-sec2014.pdf and the
12593 followup implementation paper at https://arxiv.org/abs/1709.01044.
12594 Closes ticket 12541.
12596 o Major features (next-generation onion services):
12597 - Tor now supports the next-generation onion services protocol for
12598 clients and services! As part of this release, the core of
12599 proposal 224 has been implemented and is available for
12600 experimentation and testing by our users. This newer version of
12601 onion services ("v3") features many improvements over the legacy
12604 a) Better crypto (replaced SHA1/DH/RSA1024
12605 with SHA3/ed25519/curve25519)
12607 b) Improved directory protocol, leaking much less information to
12610 c) Improved directory protocol, with smaller surface for
12613 d) Better onion address security against impersonation.
12615 e) More extensible introduction/rendezvous protocol.
12617 f) A cleaner and more modular codebase.
12619 You can identify a next-generation onion address by its length:
12620 they are 56 characters long, as in
12621 "4acth47i6kxnvkewtm6q7ib2s3ufpo5sqbsnzjpbi7utijcltosqemad.onion".
12623 In the future, we will release more options and features for v3
12624 onion services, but we first need a testing period, so that the
12625 current codebase matures and becomes more robust. Planned features
12626 include: offline keys, advanced client authorization, improved
12627 guard algorithms, and statistics. For full details, see
12630 Legacy ("v2") onion services will still work for the foreseeable
12631 future, and will remain the default until this new codebase gets
12632 tested and hardened. Service operators who want to experiment with
12633 the new system can use the 'HiddenServiceVersion 3' torrc
12634 directive along with the regular onion service configuration
12635 options. We will publish a blog post about this new feature
12638 o Major bugfixes (usability, control port):
12639 - Report trusted clock skew indications as bootstrap errors, so
12640 controllers can more easily alert users when their clocks are
12641 wrong. Fixes bug 23506; bugfix on 0.1.2.6-alpha.
12643 o Minor features (bug detection):
12644 - Log a warning message with a stack trace for any attempt to call
12645 get_options() during option validation. This pattern has caused
12646 subtle bugs in the past. Closes ticket 22281.
12648 o Minor features (client):
12649 - You can now use Tor as a tunneled HTTP proxy: use the new
12650 HTTPTunnelPort option to open a port that accepts HTTP CONNECT
12651 requests. Closes ticket 22407.
12652 - Add an extra check to make sure that we always use the newer guard
12653 selection code for picking our guards. Closes ticket 22779.
12654 - When downloading (micro)descriptors, don't split the list into
12655 multiple requests unless we want at least 32 descriptors.
12656 Previously, we split at 4, not 32, which led to significant
12657 overhead in HTTP request size and degradation in compression
12658 performance. Closes ticket 23220.
12660 o Minor features (command line):
12661 - Add a new commandline option, --key-expiration, which prints when
12662 the current signing key is going to expire. Implements ticket
12663 17639; patch by Isis Lovecruft.
12665 o Minor features (control port):
12666 - If an application tries to use the control port as an HTTP proxy,
12667 respond with a meaningful "This is the Tor control port" message,
12668 and log the event. Closes ticket 1667. Patch from Ravi
12670 - Provide better error message for GETINFO desc/(id|name) when not
12671 fetching router descriptors. Closes ticket 5847. Patch by
12673 - Add GETINFO "{desc,md}/download-enabled", to inform the controller
12674 whether Tor will try to download router descriptors and
12675 microdescriptors respectively. Closes ticket 22684.
12676 - Added new GETINFO targets "ip-to-country/{ipv4,ipv6}-available",
12677 so controllers can tell whether the geoip databases are loaded.
12678 Closes ticket 23237.
12679 - Adds a timestamp field to the CIRC_BW and STREAM_BW bandwidth
12680 events. Closes ticket 19254. Patch by "DonnchaC".
12682 o Minor features (development support):
12683 - Developers can now generate a call-graph for Tor using the
12684 "calltool" python program, which post-processes object dumps. It
12685 should work okay on many Linux and OSX platforms, and might work
12686 elsewhere too. To run it, install calltool from
12687 https://gitweb.torproject.org/user/nickm/calltool.git and run
12688 "make callgraph". Closes ticket 19307.
12690 o Minor features (ed25519):
12691 - Add validation function to checks for torsion components in
12692 ed25519 public keys, used by prop224 client-side code. Closes
12693 ticket 22006. Math help by Ian Goldberg.
12695 o Minor features (exit relay, DNS):
12696 - Improve the clarity and safety of the log message from evdns when
12697 receiving an apparently spoofed DNS reply. Closes ticket 3056.
12699 o Minor features (integration, hardening):
12700 - Add a new NoExec option to prevent Tor from running other
12701 programs. When this option is set to 1, Tor will never try to run
12702 another program, regardless of the settings of
12703 PortForwardingHelper, ClientTransportPlugin, or
12704 ServerTransportPlugin. Once NoExec is set, it cannot be disabled
12705 without restarting Tor. Closes ticket 22976.
12707 o Minor features (logging):
12708 - Improve the warning message for specifying a relay by nickname.
12709 The previous message implied that nickname registration was still
12710 part of the Tor network design, which it isn't. Closes
12712 - If the sandbox filter fails to load, suggest to the user that
12713 their kernel might not support seccomp2. Closes ticket 23090.
12715 o Minor features (portability):
12716 - Check at configure time whether uint8_t is the same type as
12717 unsigned char. Lots of existing code already makes this
12718 assumption, and there could be strict aliasing issues if the
12719 assumption is violated. Closes ticket 22410.
12721 o Minor features (relay, configuration):
12722 - Reject attempts to use relative file paths when RunAsDaemon is
12723 set. Previously, Tor would accept these, but the directory-
12724 changing step of RunAsDaemon would give strange and/or confusing
12725 results. Closes ticket 22731.
12727 o Minor features (startup, safety):
12728 - When configured to write a PID file, Tor now exits if it is unable
12729 to do so. Previously, it would warn and continue. Closes
12732 o Minor features (static analysis):
12733 - The BUG() macro has been changed slightly so that Coverity no
12734 longer complains about dead code if the bug is impossible. Closes
12737 o Minor features (testing):
12738 - The default chutney network tests now include tests for the v3
12739 hidden service design. Make sure you have the latest version of
12740 chutney if you want to run these. Closes ticket 22437.
12741 - Add a unit test to verify that we can parse a hardcoded v2 hidden
12742 service descriptor. Closes ticket 15554.
12744 o Minor bugfixes (certificate handling):
12745 - Fix a time handling bug in Tor certificates set to expire after
12746 the year 2106. Fixes bug 23055; bugfix on 0.3.0.1-alpha. Found by
12747 Coverity as CID 1415728.
12749 o Minor bugfixes (client, usability):
12750 - Refrain from needlessly rejecting SOCKS5-with-hostnames and
12751 SOCKS4a requests that contain IP address strings, even when
12752 SafeSocks in enabled, as this prevents user from connecting to
12753 known IP addresses without relying on DNS for resolving. SafeSocks
12754 still rejects SOCKS connections that connect to IP addresses when
12755 those addresses are _not_ encoded as hostnames. Fixes bug 22461;
12756 bugfix on Tor 0.2.6.2-alpha.
12758 o Minor bugfixes (code correctness):
12759 - Call htons() in extend_cell_format() for encoding a 16-bit value.
12760 Previously we used ntohs(), which happens to behave the same on
12761 all the platforms we support, but which isn't really correct.
12762 Fixes bug 23106; bugfix on 0.2.4.8-alpha.
12763 - For defense-in-depth, make the controller's write_escaped_data()
12764 function robust to extremely long inputs. Fixes bug 19281; bugfix
12765 on 0.1.1.1-alpha. Reported by Guido Vranken.
12767 o Minor bugfixes (compilation):
12768 - Fix unused-variable warnings in donna's Curve25519 SSE2 code.
12769 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
12771 o Minor bugfixes (consensus expiry):
12772 - Check for adequate directory information correctly. Previously, Tor
12773 would reconsider whether it had sufficient directory information
12774 every 2 minutes. Fixes bug 23091; bugfix on 0.2.0.19-alpha.
12776 o Minor bugfixes (directory protocol):
12777 - Directory servers now include a "Date:" http header for response
12778 codes other than 200. Clients starting with a skewed clock and a
12779 recent consensus were getting "304 Not modified" responses from
12780 directory authorities, so without the Date header, the client
12781 would never hear about a wrong clock. Fixes bug 23499; bugfix
12783 - Make clients wait for 6 seconds before trying to download a
12784 consensus from an authority. Fixes bug 17750; bugfix
12787 o Minor bugfixes (DoS-resistance):
12788 - If future code asks if there are any running bridges, without
12789 checking if bridges are enabled, log a BUG warning rather than
12790 crashing. Fixes bug 23524; bugfix on 0.3.0.1-alpha.
12792 o Minor bugfixes (format strictness):
12793 - Restrict several data formats to decimal. Previously, the
12794 BuildTimeHistogram entries in the state file, the "bw=" entries in
12795 the bandwidth authority file, and the process IDs passed to the
12796 __OwningControllerProcess option could all be specified in hex or
12797 octal as well as in decimal. This was not an intentional feature.
12798 Fixes bug 22802; bugfixes on 0.2.2.1-alpha, 0.2.2.2-alpha,
12801 o Minor bugfixes (heartbeat):
12802 - If we fail to write a heartbeat message, schedule a retry for the
12803 minimum heartbeat interval number of seconds in the future. Fixes
12804 bug 19476; bugfix on 0.2.3.1-alpha.
12806 o Minor bugfixes (linux seccomp2 sandbox, logging):
12807 - Fix some messages on unexpected errors from the seccomp2 library.
12808 Fixes bug 22750; bugfix on 0.2.5.1-alpha. Patch from "cypherpunks".
12810 o Minor bugfixes (logging):
12811 - Remove duplicate log messages regarding opening non-local
12812 SocksPorts upon parsing config and opening listeners at startup.
12813 Fixes bug 4019; bugfix on 0.2.3.3-alpha.
12814 - Use a more comprehensible log message when telling the user
12815 they've excluded every running exit node. Fixes bug 7890; bugfix
12817 - When logging the number of descriptors we intend to download per
12818 directory request, do not log a number higher than then the number
12819 of descriptors we're fetching in total. Fixes bug 19648; bugfix
12821 - When warning about a directory owned by the wrong user, log the
12822 actual name of the user owning the directory. Previously, we'd log
12823 the name of the process owner twice. Fixes bug 23487; bugfix
12825 - The tor specification says hop counts are 1-based, so fix two log
12826 messages that mistakenly logged 0-based hop counts. Fixes bug
12827 18982; bugfix on 0.2.6.2-alpha and 0.2.4.5-alpha. Patch by teor.
12828 Credit to Xiaofan Li for reporting this issue.
12830 o Minor bugfixes (portability):
12831 - Stop using the PATH_MAX variable, which is not defined on GNU
12832 Hurd. Fixes bug 23098; bugfix on 0.3.1.1-alpha.
12834 o Minor bugfixes (relay):
12835 - When uploading our descriptor for the first time after startup,
12836 report the reason for uploading as "Tor just started" rather than
12837 leaving it blank. Fixes bug 22885; bugfix on 0.2.3.4-alpha.
12838 - Avoid unnecessary calls to directory_fetches_from_authorities() on
12839 relays, to prevent spurious address resolutions and descriptor
12840 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
12841 bugfix on in 0.2.8.1-alpha.
12843 o Minor bugfixes (tests):
12844 - Fix a broken unit test for the OutboundAddress option: the parsing
12845 function was never returning an error on failure. Fixes bug 23366;
12846 bugfix on 0.3.0.3-alpha.
12847 - Fix a signed-integer overflow in the unit tests for
12848 dir/download_status_random_backoff, which was untriggered until we
12849 fixed bug 17750. Fixes bug 22924; bugfix on 0.2.9.1-alpha.
12851 o Minor bugfixes (usability, control port):
12852 - Stop making an unnecessary routerlist check in NETINFO clock skew
12853 detection; this was preventing clients from reporting NETINFO clock
12854 skew to controllers. Fixes bug 23532; bugfix on 0.2.4.4-alpha.
12856 o Code simplification and refactoring:
12857 - Extract the code for handling newly-open channels into a separate
12858 function from the general code to handle channel state
12859 transitions. This change simplifies our callgraph, reducing the
12860 size of the largest strongly connected component by roughly a
12861 factor of two. Closes ticket 22608.
12862 - Remove dead code for largely unused statistics on the number of
12863 times we've attempted various public key operations. Fixes bug
12864 19871; bugfix on 0.1.2.4-alpha. Fix by Isis Lovecruft.
12865 - Remove several now-obsolete functions for asking about old
12866 variants directory authority status. Closes ticket 22311; patch
12868 - Remove some of the code that once supported "Named" and "Unnamed"
12869 routers. Authorities no longer vote for these flags. Closes
12871 - Rename the obsolete malleable hybrid_encrypt functions used in TAP
12872 and old hidden services, to indicate that they aren't suitable for
12873 new protocols or formats. Closes ticket 23026.
12874 - Replace our STRUCT_OFFSET() macro with offsetof(). Closes ticket
12875 22521. Patch from Neel Chauhan.
12876 - Split the enormous circuit_send_next_onion_skin() function into
12877 multiple subfunctions. Closes ticket 22804.
12878 - Split the portions of the buffer.c module that handle particular
12879 protocols into separate modules. Part of ticket 23149.
12880 - Use our test macros more consistently, to produce more useful
12881 error messages when our unit tests fail. Add coccinelle patches to
12882 allow us to re-check for test macro uses. Closes ticket 22497.
12884 o Deprecated features:
12885 - Deprecate HTTPProxy/HTTPProxyAuthenticator config options. They
12886 only applies to direct unencrypted HTTP connections to your
12887 directory server, which your Tor probably isn't using. Closes
12891 - Clarify in the manual that "Sandbox 1" is only supported on Linux
12892 kernels. Closes ticket 22677.
12893 - Document all values of PublishServerDescriptor in the manpage.
12894 Closes ticket 15645.
12895 - Improve the documentation for the directory port part of the
12896 DirAuthority line. Closes ticket 20152.
12897 - Restore documentation for the authorities' "approved-routers"
12898 file. Closes ticket 21148.
12900 o Removed features:
12901 - The AllowDotExit option has been removed as unsafe. It has been
12902 deprecated since 0.2.9.2-alpha. Closes ticket 23426.
12903 - The ClientDNSRejectInternalAddresses flag can no longer be set on
12904 non-testing networks. It has been deprecated since 0.2.9.2-alpha.
12905 Closes ticket 21031.
12906 - The controller API no longer includes an AUTHDIR_NEWDESCS event:
12907 nobody was using it any longer. Closes ticket 22377.
12910 Changes in version 0.2.8.15 - 2017-09-18
12911 Tor 0.2.8.15 backports a collection of bugfixes from later
12914 Most significantly, it includes a fix for TROVE-2017-008, a
12915 security bug that affects hidden services running with the
12916 SafeLogging option disabled. For more information, see
12917 https://trac.torproject.org/projects/tor/ticket/23490
12919 Note that Tor 0.2.8.x will no longer be supported after 1 Jan
12920 2018. We suggest that you upgrade to the latest stable release if
12921 possible. If you can't, we recommend that you upgrade at least to
12922 0.2.9, which will be supported until 2020.
12924 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
12925 - Avoid an assertion failure bug affecting our implementation of
12926 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
12927 handling of "0xx" differs from what we had expected. Fixes bug
12928 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
12931 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
12934 o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
12935 - Backport a fix for an "unused variable" warning that appeared
12936 in some versions of mingw. Fixes bug 22838; bugfix on
12939 o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
12940 - Fix a memset() off the end of an array when packing cells. This
12941 bug should be harmless in practice, since the corrupted bytes are
12942 still in the same structure, and are always padding bytes,
12943 ignored, or immediately overwritten, depending on compiler
12944 behavior. Nevertheless, because the memset()'s purpose is to make
12945 sure that any other cell-handling bugs can't expose bytes to the
12946 network, we need to fix it. Fixes bug 22737; bugfix on
12947 0.2.4.11-alpha. Fixes CID 1401591.
12949 o Build features (backport from 0.3.1.5-alpha):
12950 - Tor's repository now includes a Travis Continuous Integration (CI)
12951 configuration file (.travis.yml). This is meant to help new
12952 developers and contributors who fork Tor to a Github repository be
12953 better able to test their changes, and understand what we expect
12954 to pass. To use this new build feature, you must fork Tor to your
12955 Github account, then go into the "Integrations" menu in the
12956 repository settings for your fork and enable Travis, then push
12957 your changes. Closes ticket 22636.
12960 Changes in version 0.2.9.12 - 2017-09-18
12961 Tor 0.2.9.12 backports a collection of bugfixes from later
12964 Most significantly, it includes a fix for TROVE-2017-008, a
12965 security bug that affects hidden services running with the
12966 SafeLogging option disabled. For more information, see
12967 https://trac.torproject.org/projects/tor/ticket/23490
12969 o Major features (security, backport from 0.3.0.2-alpha):
12970 - Change the algorithm used to decide DNS TTLs on client and server
12971 side, to better resist DNS-based correlation attacks like the
12972 DefecTor attack of Greschbach, Pulls, Roberts, Winter, and
12973 Feamster. Now relays only return one of two possible DNS TTL
12974 values, and clients are willing to believe DNS TTL values up to 3
12975 hours long. Closes ticket 19769.
12977 o Major bugfixes (crash, directory connections, backport from 0.3.0.5-rc):
12978 - Fix a rare crash when sending a begin cell on a circuit whose
12979 linked directory connection had already been closed. Fixes bug
12980 21576; bugfix on 0.2.9.3-alpha. Reported by Alec Muffett.
12982 o Major bugfixes (DNS, backport from 0.3.0.2-alpha):
12983 - Fix a bug that prevented exit nodes from caching DNS records for
12984 more than 60 seconds. Fixes bug 19025; bugfix on 0.2.4.7-alpha.
12986 o Major bugfixes (linux TPROXY support, backport from 0.3.1.1-alpha):
12987 - Fix a typo that had prevented TPROXY-based transparent proxying
12988 from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
12989 Patch from "d4fq0fQAgoJ".
12991 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
12992 - Avoid an assertion failure bug affecting our implementation of
12993 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
12994 handling of "0xx" differs from what we had expected. Fixes bug
12995 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
12997 o Minor features (code style, backport from 0.3.1.3-alpha):
12998 - Add "Falls through" comments to our codebase, in order to silence
12999 GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
13000 Stieger. Closes ticket 22446.
13002 o Minor features (geoip):
13003 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
13006 o Minor bugfixes (bandwidth accounting, backport from 0.3.1.1-alpha):
13007 - Roll over monthly accounting at the configured hour and minute,
13008 rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
13009 Found by Andrey Karpov with PVS-Studio.
13011 o Minor bugfixes (compilation, backport from 0.3.1.5-alpha):
13012 - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug 22915;
13013 bugfix on 0.2.8.1-alpha.
13014 - Fix warnings when building with libscrypt and openssl scrypt support
13015 on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
13016 - When building with certain versions the mingw C header files, avoid
13017 float-conversion warnings when calling the C functions isfinite(),
13018 isnan(), and signbit(). Fixes bug 22801; bugfix on 0.2.8.1-alpha.
13020 o Minor bugfixes (compilation, backport from 0.3.1.7):
13021 - Avoid compiler warnings in the unit tests for running tor_sscanf()
13022 with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
13024 o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
13025 - Backport a fix for an "unused variable" warning that appeared
13026 in some versions of mingw. Fixes bug 22838; bugfix on
13029 o Minor bugfixes (controller, backport from 0.3.1.7):
13030 - Do not crash when receiving a HSPOST command with an empty body.
13031 Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
13032 - Do not crash when receiving a POSTDESCRIPTOR command with an
13033 empty body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
13035 o Minor bugfixes (coverity build support, backport from 0.3.1.5-alpha):
13036 - Avoid Coverity build warnings related to our BUG() macro. By
13037 default, Coverity treats BUG() as the Linux kernel does: an
13038 instant abort(). We need to override that so our BUG() macro
13039 doesn't prevent Coverity from analyzing functions that use it.
13040 Fixes bug 23030; bugfix on 0.2.9.1-alpha.
13042 o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
13043 - Fix a memset() off the end of an array when packing cells. This
13044 bug should be harmless in practice, since the corrupted bytes are
13045 still in the same structure, and are always padding bytes,
13046 ignored, or immediately overwritten, depending on compiler
13047 behavior. Nevertheless, because the memset()'s purpose is to make
13048 sure that any other cell-handling bugs can't expose bytes to the
13049 network, we need to fix it. Fixes bug 22737; bugfix on
13050 0.2.4.11-alpha. Fixes CID 1401591.
13052 o Minor bugfixes (file limits, osx, backport from 0.3.1.5-alpha):
13053 - When setting the maximum number of connections allowed by the OS,
13054 always allow some extra file descriptors for other files. Fixes
13055 bug 22797; bugfix on 0.2.0.10-alpha.
13057 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.5-alpha):
13058 - Avoid a sandbox failure when trying to re-bind to a socket and
13059 mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
13061 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.4-alpha):
13062 - Permit the fchmod system call, to avoid crashing on startup when
13063 starting with the seccomp2 sandbox and an unexpected set of
13064 permissions on the data directory or its contents. Fixes bug
13065 22516; bugfix on 0.2.5.4-alpha.
13067 o Minor bugfixes (relay, backport from 0.3.0.5-rc):
13068 - Avoid a double-marked-circuit warning that could happen when we
13069 receive DESTROY cells under heavy load. Fixes bug 20059; bugfix
13072 o Minor bugfixes (voting consistency, backport from 0.3.1.1-alpha):
13073 - Reject version numbers with non-numeric prefixes (such as +, -, or
13074 whitespace). Disallowing whitespace prevents differential version
13075 parsing between POSIX-based and Windows platforms. Fixes bug 21507
13076 and part of 21508; bugfix on 0.0.8pre1.
13078 o Build features (backport from 0.3.1.5-alpha):
13079 - Tor's repository now includes a Travis Continuous Integration (CI)
13080 configuration file (.travis.yml). This is meant to help new
13081 developers and contributors who fork Tor to a Github repository be
13082 better able to test their changes, and understand what we expect
13083 to pass. To use this new build feature, you must fork Tor to your
13084 Github account, then go into the "Integrations" menu in the
13085 repository settings for your fork and enable Travis, then push
13086 your changes. Closes ticket 22636.
13089 Changes in version 0.3.0.11 - 2017-09-18
13090 Tor 0.3.0.11 backports a collection of bugfixes from Tor the 0.3.1
13093 Most significantly, it includes a fix for TROVE-2017-008, a
13094 security bug that affects hidden services running with the
13095 SafeLogging option disabled. For more information, see
13096 https://trac.torproject.org/projects/tor/ticket/23490
13098 o Minor features (code style, backport from 0.3.1.7):
13099 - Add "Falls through" comments to our codebase, in order to silence
13100 GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
13101 Stieger. Closes ticket 22446.
13104 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
13107 o Minor bugfixes (compilation, backport from 0.3.1.7):
13108 - Avoid compiler warnings in the unit tests for calling tor_sscanf()
13109 with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
13111 o Minor bugfixes (controller, backport from 0.3.1.7):
13112 - Do not crash when receiving a HSPOST command with an empty body.
13113 Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
13114 - Do not crash when receiving a POSTDESCRIPTOR command with an empty
13115 body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
13117 o Minor bugfixes (file limits, osx, backport from 0.3.1.5-alpha):
13118 - When setting the maximum number of connections allowed by the OS,
13119 always allow some extra file descriptors for other files. Fixes
13120 bug 22797; bugfix on 0.2.0.10-alpha.
13122 o Minor bugfixes (logging, relay, backport from 0.3.1.6-rc):
13123 - Remove a forgotten debugging message when an introduction point
13124 successfully establishes a hidden service prop224 circuit with
13126 - Change three other log_warn() for an introduction point to
13127 protocol warnings, because they can be failure from the network
13128 and are not relevant to the operator. Fixes bug 23078; bugfix on
13129 0.3.0.1-alpha and 0.3.0.2-alpha.
13132 Changes in version 0.3.1.7 - 2017-09-18
13133 Tor 0.3.1.7 is the first stable release in the 0.3.1 series.
13135 With the 0.3.1 series, Tor now serves and downloads directory
13136 information in more compact formats, to save on bandwidth overhead. It
13137 also contains a new padding system to resist netflow-based traffic
13138 analysis, and experimental support for building parts of Tor in Rust
13139 (though no parts of Tor are in Rust yet). There are also numerous
13140 small features, bugfixes on earlier release series, and groundwork for
13141 the hidden services revamp of 0.3.2.
13143 This release also includes a fix for TROVE-2017-008, a security bug
13144 that affects hidden services running with the SafeLogging option
13145 disabled. For more information, see
13146 https://trac.torproject.org/projects/tor/ticket/23490
13148 Per our stable release policy, we plan to support each stable release
13149 series for at least the next nine months, or for three months after
13150 the first stable release of the next series: whichever is longer. If
13151 you need a release with long-term support, we recommend that you stay
13152 with the 0.2.9 series.
13154 Below is a list of the changes since 0.3.1.6-rc. For a list of all
13155 changes since 0.3.0, see the ReleaseNotes file.
13157 o Major bugfixes (security, hidden services, loggging):
13158 - Fix a bug where we could log uninitialized stack when a certain
13159 hidden service error occurred while SafeLogging was disabled.
13160 Fixes bug #23490; bugfix on 0.2.7.2-alpha. This is also tracked as
13161 TROVE-2017-008 and CVE-2017-0380.
13163 o Minor features (defensive programming):
13164 - Create a pair of consensus parameters, nf_pad_tor2web and
13165 nf_pad_single_onion, to disable netflow padding in the consensus
13166 for non-anonymous connections in case the overhead is high. Closes
13169 o Minor features (diagnostic):
13170 - Add a stack trace to the bug warnings that can be logged when
13171 trying to send an outgoing relay cell with n_chan == 0. Diagnostic
13172 attempt for bug 23105.
13174 o Minor features (geoip):
13175 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
13178 o Minor bugfixes (compilation):
13179 - Avoid compiler warnings in the unit tests for calling tor_sscanf()
13180 with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
13182 o Minor bugfixes (controller):
13183 - Do not crash when receiving a HSPOST command with an empty body.
13184 Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
13185 - Do not crash when receiving a POSTDESCRIPTOR command with an empty
13186 body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
13188 o Minor bugfixes (relay):
13189 - Inform the geoip and rephist modules about all requests, even on
13190 relays that are only fetching microdescriptors. Fixes a bug
13191 related to 21585; bugfix on 0.3.0.1-alpha.
13193 o Minor bugfixes (unit tests):
13194 - Fix a channelpadding unit test failure on slow systems by using
13195 mocked time instead of actual time. Fixes bug 23077; bugfix
13199 Changes in version 0.3.1.6-rc - 2017-09-05
13200 Tor 0.3.1.6-rc fixes a few small bugs and annoyances in the 0.3.1
13201 release series, including a bug that produced weird behavior on
13202 Windows directory caches.
13204 This is the first release candidate in the Tor 0.3.1 series. If we
13205 find no new bugs or regressions here, the first stable 0.3.1 release
13206 will be nearly identical to it.
13208 o Major bugfixes (windows, directory cache):
13209 - On Windows, do not try to delete cached consensus documents and
13210 diffs before they are unmapped from memory--Windows won't allow
13211 that. Instead, allow the consensus cache directory to grow larger,
13212 to hold files that might need to stay around longer. Fixes bug
13213 22752; bugfix on 0.3.1.1-alpha.
13215 o Minor features (directory authority):
13216 - Improve the message that authorities report to relays that present
13217 RSA/Ed25519 keypairs that conflict with previously pinned keys.
13218 Closes ticket 22348.
13220 o Minor features (geoip):
13221 - Update geoip and geoip6 to the August 3 2017 Maxmind GeoLite2
13224 o Minor features (testing):
13225 - Add more tests for compression backend initialization. Closes
13228 o Minor bugfixes (directory cache):
13229 - Fix a memory leak when recovering space in the consensus cache.
13230 Fixes bug 23139; bugfix on 0.3.1.1-alpha.
13232 o Minor bugfixes (hidden service):
13233 - Increase the number of circuits that a service is allowed to
13234 open over a specific period of time. The value was lower than it
13235 should be (8 vs 12) in the normal case of 3 introduction points.
13236 Fixes bug 22159; bugfix on 0.3.0.5-rc.
13237 - Fix a BUG warning during HSv3 descriptor decoding that could be
13238 cause by a specially crafted descriptor. Fixes bug 23233; bugfix
13239 on 0.3.0.1-alpha. Bug found by "haxxpop".
13240 - Rate-limit the log messages if we exceed the maximum number of
13241 allowed intro circuits. Fixes bug 22159; bugfix on 0.3.1.1-alpha.
13243 o Minor bugfixes (logging, relay):
13244 - Remove a forgotten debugging message when an introduction point
13245 successfully establishes a hidden service prop224 circuit with
13247 - Change three other log_warn() for an introduction point to
13248 protocol warnings, because they can be failure from the network
13249 and are not relevant to the operator. Fixes bug 23078; bugfix on
13250 0.3.0.1-alpha and 0.3.0.2-alpha.
13252 o Minor bugfixes (relay):
13253 - When a relay is not running as a directory cache, it will no
13254 longer generate compressed consensuses and consensus diff
13255 information. Previously, this was a waste of disk and CPU. Fixes
13256 bug 23275; bugfix on 0.3.1.1-alpha.
13258 o Minor bugfixes (robustness, error handling):
13259 - Improve our handling of the cases where OpenSSL encounters a
13260 memory error while encoding keys and certificates. We haven't
13261 observed these errors in the wild, but if they do happen, we now
13262 detect and respond better. Fixes bug 19418; bugfix on all versions
13263 of Tor. Reported by Guido Vranken.
13265 o Minor bugfixes (stability):
13266 - Avoid crashing on a double-free when unable to load or process an
13267 included file. Fixes bug 23155; bugfix on 0.3.1.1-alpha. Found
13268 with the clang static analyzer.
13270 o Minor bugfixes (testing):
13271 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
13272 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
13273 - Port the hs_ntor handshake test to work correctly with recent
13274 versions of the pysha3 module. Fixes bug 23071; bugfix
13277 o Minor bugfixes (Windows service):
13278 - When running as a Windows service, set the ID of the main thread
13279 correctly. Failure to do so made us fail to send log messages to
13280 the controller in 0.2.1.16-rc, slowed down controller event
13281 delivery in 0.2.7.3-rc and later, and crash with an assertion
13282 failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
13283 Patch and diagnosis from "Vort".
13286 Changes in version 0.3.0.10 - 2017-08-02
13287 Tor 0.3.0.10 backports a collection of small-to-medium bugfixes
13288 from the current Tor alpha series. OpenBSD users and TPROXY users
13289 should upgrade; others are probably okay sticking with 0.3.0.9.
13291 o Major features (build system, continuous integration, backport from 0.3.1.5-alpha):
13292 - Tor's repository now includes a Travis Continuous Integration (CI)
13293 configuration file (.travis.yml). This is meant to help new
13294 developers and contributors who fork Tor to a Github repository be
13295 better able to test their changes, and understand what we expect
13296 to pass. To use this new build feature, you must fork Tor to your
13297 Github account, then go into the "Integrations" menu in the
13298 repository settings for your fork and enable Travis, then push
13299 your changes. Closes ticket 22636.
13301 o Major bugfixes (linux TPROXY support, backport from 0.3.1.1-alpha):
13302 - Fix a typo that had prevented TPROXY-based transparent proxying
13303 from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
13304 Patch from "d4fq0fQAgoJ".
13306 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
13307 - Avoid an assertion failure bug affecting our implementation of
13308 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
13309 handling of "0xbar" differs from what we had expected. Fixes bug
13310 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
13312 o Minor features (backport from 0.3.1.5-alpha):
13313 - Update geoip and geoip6 to the July 4 2017 Maxmind GeoLite2
13316 o Minor bugfixes (bandwidth accounting, backport from 0.3.1.2-alpha):
13317 - Roll over monthly accounting at the configured hour and minute,
13318 rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
13319 Found by Andrey Karpov with PVS-Studio.
13321 o Minor bugfixes (compilation warnings, backport from 0.3.1.5-alpha):
13322 - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug 22915;
13323 bugfix on 0.2.8.1-alpha.
13324 - Fix warnings when building with libscrypt and openssl scrypt
13325 support on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
13326 - When building with certain versions of the mingw C header files,
13327 avoid float-conversion warnings when calling the C functions
13328 isfinite(), isnan(), and signbit(). Fixes bug 22801; bugfix
13331 o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
13332 - Backport a fix for an "unused variable" warning that appeared
13333 in some versions of mingw. Fixes bug 22838; bugfix on
13336 o Minor bugfixes (coverity build support, backport from 0.3.1.5-alpha):
13337 - Avoid Coverity build warnings related to our BUG() macro. By
13338 default, Coverity treats BUG() as the Linux kernel does: an
13339 instant abort(). We need to override that so our BUG() macro
13340 doesn't prevent Coverity from analyzing functions that use it.
13341 Fixes bug 23030; bugfix on 0.2.9.1-alpha.
13343 o Minor bugfixes (directory authority, backport from 0.3.1.1-alpha):
13344 - When rejecting a router descriptor for running an obsolete version
13345 of Tor without ntor support, warn about the obsolete tor version,
13346 not the missing ntor key. Fixes bug 20270; bugfix on 0.2.9.3-alpha.
13348 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.5-alpha):
13349 - Avoid a sandbox failure when trying to re-bind to a socket and
13350 mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
13352 o Minor bugfixes (unit tests, backport from 0.3.1.5-alpha)
13353 - Fix a memory leak in the link-handshake/certs_ok_ed25519 test.
13354 Fixes bug 22803; bugfix on 0.3.0.1-alpha.
13357 Changes in version 0.3.1.5-alpha - 2017-08-01
13358 Tor 0.3.1.5-alpha improves the performance of consensus diff
13359 calculation, fixes a crash bug on older versions of OpenBSD, and fixes
13360 several other bugs. If no serious bugs are found in this version, the
13361 next version will be a release candidate.
13363 This release also marks the end of support for the Tor 0.2.4.x,
13364 0.2.6.x, and 0.2.7.x release series. Those releases will receive no
13365 further bug or security fixes. Anyone still running or distributing
13366 one of those versions should upgrade.
13368 o Major features (build system, continuous integration):
13369 - Tor's repository now includes a Travis Continuous Integration (CI)
13370 configuration file (.travis.yml). This is meant to help new
13371 developers and contributors who fork Tor to a Github repository be
13372 better able to test their changes, and understand what we expect
13373 to pass. To use this new build feature, you must fork Tor to your
13374 Github account, then go into the "Integrations" menu in the
13375 repository settings for your fork and enable Travis, then push
13376 your changes. Closes ticket 22636.
13378 o Major bugfixes (openbsd, denial-of-service):
13379 - Avoid an assertion failure bug affecting our implementation of
13380 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
13381 handling of "0xbar" differs from what we had expected. Fixes bug
13382 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
13384 o Major bugfixes (relay, performance):
13385 - Perform circuit handshake operations at a higher priority than we
13386 use for consensus diff creation and compression. This should
13387 prevent circuits from starving when a relay or bridge receives a
13388 new consensus, especially on lower-powered machines. Fixes bug
13389 22883; bugfix on 0.3.1.1-alpha.
13391 o Minor features (bridge authority):
13392 - Add "fingerprint" lines to the networkstatus-bridges file produced
13393 by bridge authorities. Closes ticket 22207.
13395 o Minor features (directory cache, consensus diff):
13396 - Add a new MaxConsensusAgeForDiffs option to allow directory cache
13397 operators with low-resource environments to adjust the number of
13398 consensuses they'll store and generate diffs from. Most cache
13399 operators should leave it unchanged. Helps to work around
13402 o Minor features (geoip):
13403 - Update geoip and geoip6 to the July 4 2017 Maxmind GeoLite2
13406 o Minor features (relay, performance):
13407 - Always start relays with at least two worker threads, to prevent
13408 priority inversion on slow tasks. Part of the fix for bug 22883.
13409 - Allow background work to be queued with different priorities, so
13410 that a big pile of slow low-priority jobs will not starve out
13411 higher priority jobs. This lays the groundwork for a fix for
13414 o Minor bugfixes (build system, rust):
13415 - Fix a problem where Rust toolchains were not being found when
13416 building without --enable-cargo-online-mode, due to setting the
13417 $HOME environment variable instead of $CARGO_HOME. Fixes bug
13418 22830; bugfix on 0.3.1.1-alpha. Fix by Chelsea Komlo.
13420 o Minor bugfixes (compatibility, zstd):
13421 - Write zstd epilogues correctly when the epilogue requires
13422 reallocation of the output buffer, even with zstd 1.3.0.
13423 (Previously, we worked on 1.2.0 and failed with 1.3.0). Fixes bug
13424 22927; bugfix on 0.3.1.1-alpha.
13426 o Minor bugfixes (compilation warnings):
13427 - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug
13428 22915; bugfix on 0.2.8.1-alpha.
13429 - Fix warnings when building with libscrypt and openssl scrypt
13430 support on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
13431 - Compile correctly when both openssl 1.1.0 and libscrypt are
13432 detected. Previously this would cause an error. Fixes bug 22892;
13433 bugfix on 0.3.1.1-alpha.
13434 - When building with certain versions of the mingw C header files,
13435 avoid float-conversion warnings when calling the C functions
13436 isfinite(), isnan(), and signbit(). Fixes bug 22801; bugfix
13439 o Minor bugfixes (coverity build support):
13440 - Avoid Coverity build warnings related to our BUG() macro. By
13441 default, Coverity treats BUG() as the Linux kernel does: an
13442 instant abort(). We need to override that so our BUG() macro
13443 doesn't prevent Coverity from analyzing functions that use it.
13444 Fixes bug 23030; bugfix on 0.2.9.1-alpha.
13446 o Minor bugfixes (directory authority):
13447 - When a directory authority rejects a descriptor or extrainfo with
13448 a given digest, mark that digest as undownloadable, so that we do
13449 not attempt to download it again over and over. We previously
13450 tried to avoid downloading such descriptors by other means, but we
13451 didn't notice if we accidentally downloaded one anyway. This
13452 behavior became problematic in 0.2.7.2-alpha, when authorities
13453 began pinning Ed25519 keys. Fixes bug 22349; bugfix
13456 o Minor bugfixes (error reporting, windows):
13457 - When formatting Windows error messages, use the English format to
13458 avoid codepage issues. Fixes bug 22520; bugfix on 0.1.2.8-alpha.
13461 o Minor bugfixes (file limits, osx):
13462 - When setting the maximum number of connections allowed by the OS,
13463 always allow some extra file descriptors for other files. Fixes
13464 bug 22797; bugfix on 0.2.0.10-alpha.
13466 o Minor bugfixes (linux seccomp2 sandbox):
13467 - Avoid a sandbox failure when trying to re-bind to a socket and
13468 mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
13470 o Minor bugfixes (memory leaks):
13471 - Fix a small memory leak when validating a configuration that uses
13472 two or more AF_UNIX sockets for the same port type. Fixes bug
13473 23053; bugfix on 0.2.6.3-alpha. This is CID 1415725.
13475 o Minor bugfixes (unit tests):
13476 - test_consdiff_base64cmp would fail on OS X because while OS X
13477 follows the standard of (less than zero/zero/greater than zero),
13478 it doesn't follow the convention of (-1/0/+1). Make the test
13479 comply with the standard. Fixes bug 22870; bugfix on 0.3.1.1-alpha.
13480 - Fix a memory leak in the link-handshake/certs_ok_ed25519 test.
13481 Fixes bug 22803; bugfix on 0.3.0.1-alpha.
13484 Changes in version 0.3.1.4-alpha - 2017-06-29
13485 Tor 0.3.1.4-alpha fixes a path selection bug that would allow a client
13486 to use a guard that was in the same network family as a chosen exit
13487 relay. This is a security regression; all clients running earlier
13488 versions of 0.3.0.x or 0.3.1.x should upgrade to 0.3.0.9
13491 This release also fixes several other bugs introduced in 0.3.0.x
13492 and 0.3.1.x, including others that can affect bandwidth usage
13495 o New dependencies:
13496 - To build with zstd and lzma support, Tor now requires the
13497 pkg-config tool at build time. (This requirement was new in
13498 0.3.1.1-alpha, but was not noted at the time. Noting it here to
13499 close ticket 22623.)
13501 o Major bugfixes (path selection, security):
13502 - When choosing which guard to use for a circuit, avoid the exit's
13503 family along with the exit itself. Previously, the new guard
13504 selection logic avoided the exit, but did not consider its family.
13505 Fixes bug 22753; bugfix on 0.3.0.1-alpha. Tracked as TROVE-2017-
13506 006 and CVE-2017-0377.
13508 o Major bugfixes (compression, zstd):
13509 - Correctly detect a full buffer when decompressing a large zstd-
13510 compressed input. Previously, we would sometimes treat a full
13511 buffer as an error. Fixes bug 22628; bugfix on 0.3.1.1-alpha.
13513 o Major bugfixes (directory protocol):
13514 - Ensure that we send "304 Not modified" as HTTP status code when a
13515 client is attempting to fetch a consensus or consensus diff, and
13516 the best one we can send them is one they already have. Fixes bug
13517 22702; bugfix on 0.3.1.1-alpha.
13519 o Major bugfixes (entry guards):
13520 - When starting with an old consensus, do not add new entry guards
13521 unless the consensus is "reasonably live" (under 1 day old). Fixes
13522 one root cause of bug 22400; bugfix on 0.3.0.1-alpha.
13524 o Minor features (bug mitigation, diagnostics, logging):
13525 - Avoid an assertion failure, and log a better error message, when
13526 unable to remove a file from the consensus cache on Windows.
13527 Attempts to mitigate and diagnose bug 22752.
13529 o Minor features (geoip):
13530 - Update geoip and geoip6 to the June 8 2017 Maxmind GeoLite2
13533 o Minor bugfixes (compression):
13534 - When compressing or decompressing a buffer, check for a failure to
13535 create a compression object. Fixes bug 22626; bugfix
13537 - When decompressing a buffer, check for extra data after the end of
13538 the compressed data. Fixes bug 22629; bugfix on 0.3.1.1-alpha.
13539 - When decompressing an object received over an anonymous directory
13540 connection, if we have already decompressed it using an acceptable
13541 compression method, do not reject it for looking like an
13542 unacceptable compression method. Fixes part of bug 22670; bugfix
13544 - When serving directory votes compressed with zlib, do not claim to
13545 have compressed them with zstd. Fixes bug 22669; bugfix
13547 - When spooling compressed data to an output buffer, don't try to
13548 spool more data when there is no more data to spool and we are not
13549 trying to flush the input. Previously, we would sometimes launch
13550 compression requests with nothing to do, which interferes with our
13551 22672 checks. Fixes bug 22719; bugfix on 0.2.0.16-alpha.
13553 o Minor bugfixes (defensive programming):
13554 - Detect and break out of infinite loops in our compression code. We
13555 don't think that any such loops exist now, but it's best to be
13556 safe. Closes ticket 22672.
13557 - Fix a memset() off the end of an array when packing cells. This
13558 bug should be harmless in practice, since the corrupted bytes are
13559 still in the same structure, and are always padding bytes,
13560 ignored, or immediately overwritten, depending on compiler
13561 behavior. Nevertheless, because the memset()'s purpose is to make
13562 sure that any other cell-handling bugs can't expose bytes to the
13563 network, we need to fix it. Fixes bug 22737; bugfix on
13564 0.2.4.11-alpha. Fixes CID 1401591.
13566 o Minor bugfixes (linux seccomp2 sandbox):
13567 - Permit the fchmod system call, to avoid crashing on startup when
13568 starting with the seccomp2 sandbox and an unexpected set of
13569 permissions on the data directory or its contents. Fixes bug
13570 22516; bugfix on 0.2.5.4-alpha.
13571 - Fix a crash in the LZMA module, when the sandbox was enabled, and
13572 liblzma would allocate more than 16 MB of memory. We solve this by
13573 bumping the mprotect() limit in the sandbox module from 16 MB to
13574 20 MB. Fixes bug 22751; bugfix on 0.3.1.1-alpha.
13576 o Minor bugfixes (logging):
13577 - When decompressing, do not warn if we fail to decompress using a
13578 compression method that we merely guessed. Fixes part of bug
13579 22670; bugfix on 0.1.1.14-alpha.
13580 - When decompressing, treat mismatch between content-encoding and
13581 actual compression type as a protocol warning. Fixes part of bug
13582 22670; bugfix on 0.1.1.9-alpha.
13583 - Downgrade "assigned_to_cpuworker failed" message to info-level
13584 severity. In every case that can reach it, either a better warning
13585 has already been logged, or no warning is warranted. Fixes bug
13586 22356; bugfix on 0.2.6.3-alpha.
13587 - Demote a warn that was caused by libevent delays to info if
13588 netflow padding is less than 4.5 seconds late, or to notice
13589 if it is more (4.5 seconds is the amount of time that a netflow
13590 record might be emitted after, if we chose the maximum timeout).
13591 Fixes bug 22212; bugfix on 0.3.1.1-alpha.
13593 o Minor bugfixes (process behavior):
13594 - When exiting because of an error, always exit with a nonzero exit
13595 status. Previously, we would fail to report an error in our exit
13596 status in cases related to __OwningControllerProcess failure,
13597 lockfile contention, and Ed25519 key initialization. Fixes bug
13598 22720; bugfix on versions 0.2.1.6-alpha, 0.2.2.28-beta, and
13599 0.2.7.2-alpha respectively. Reported by "f55jwk4f"; patch
13603 - Add a manpage description for the key-pinning-journal file. Closes
13605 - Correctly note that bandwidth accounting values are stored in the
13606 state file, and the bw_accounting file is now obsolete. Closes
13608 - Document more of the files in the Tor data directory, including
13609 cached-extrainfo, secret_onion_key{,_ntor}.old, hidserv-stats,
13610 approved-routers, sr-random, and diff-cache. Found while fixing
13614 Changes in version 0.3.0.9 - 2017-06-29
13615 Tor 0.3.0.9 fixes a path selection bug that would allow a client
13616 to use a guard that was in the same network family as a chosen exit
13617 relay. This is a security regression; all clients running earlier
13618 versions of 0.3.0.x or 0.3.1.x should upgrade to 0.3.0.9 or
13621 This release also backports several other bugfixes from the 0.3.1.x
13624 o Major bugfixes (path selection, security, backport from 0.3.1.4-alpha):
13625 - When choosing which guard to use for a circuit, avoid the exit's
13626 family along with the exit itself. Previously, the new guard
13627 selection logic avoided the exit, but did not consider its family.
13628 Fixes bug 22753; bugfix on 0.3.0.1-alpha. Tracked as TROVE-2017-
13629 006 and CVE-2017-0377.
13631 o Major bugfixes (entry guards, backport from 0.3.1.1-alpha):
13632 - Don't block bootstrapping when a primary bridge is offline and we
13633 can't get its descriptor. Fixes bug 22325; fixes one case of bug
13634 21969; bugfix on 0.3.0.3-alpha.
13636 o Major bugfixes (entry guards, backport from 0.3.1.4-alpha):
13637 - When starting with an old consensus, do not add new entry guards
13638 unless the consensus is "reasonably live" (under 1 day old). Fixes
13639 one root cause of bug 22400; bugfix on 0.3.0.1-alpha.
13641 o Minor features (geoip):
13642 - Update geoip and geoip6 to the June 8 2017 Maxmind GeoLite2
13645 o Minor bugfixes (voting consistency, backport from 0.3.1.1-alpha):
13646 - Reject version numbers with non-numeric prefixes (such as +, -, or
13647 whitespace). Disallowing whitespace prevents differential version
13648 parsing between POSIX-based and Windows platforms. Fixes bug 21507
13649 and part of 21508; bugfix on 0.0.8pre1.
13651 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.4-alpha):
13652 - Permit the fchmod system call, to avoid crashing on startup when
13653 starting with the seccomp2 sandbox and an unexpected set of
13654 permissions on the data directory or its contents. Fixes bug
13655 22516; bugfix on 0.2.5.4-alpha.
13657 o Minor bugfixes (defensive programming, backport from 0.3.1.4-alpha):
13658 - Fix a memset() off the end of an array when packing cells. This
13659 bug should be harmless in practice, since the corrupted bytes are
13660 still in the same structure, and are always padding bytes,
13661 ignored, or immediately overwritten, depending on compiler
13662 behavior. Nevertheless, because the memset()'s purpose is to make
13663 sure that any other cell-handling bugs can't expose bytes to the
13664 network, we need to fix it. Fixes bug 22737; bugfix on
13665 0.2.4.11-alpha. Fixes CID 1401591.
13668 Changes in version 0.3.1.3-alpha - 2017-06-08
13669 Tor 0.3.1.3-alpha fixes a pair of bugs that would allow an attacker to
13670 remotely crash a hidden service with an assertion failure. Anyone
13671 running a hidden service should upgrade to this version, or to some
13672 other version with fixes for TROVE-2017-004 and TROVE-2017-005.
13674 Tor 0.3.1.3-alpha also includes fixes for several key management bugs
13675 that sometimes made relays unreliable, as well as several other
13676 bugfixes described below.
13678 o Major bugfixes (hidden service, relay, security):
13679 - Fix a remotely triggerable assertion failure when a hidden service
13680 handles a malformed BEGIN cell. Fixes bug 22493, tracked as
13681 TROVE-2017-004 and as CVE-2017-0375; bugfix on 0.3.0.1-alpha.
13682 - Fix a remotely triggerable assertion failure caused by receiving a
13683 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
13684 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
13687 o Major bugfixes (relay, link handshake):
13688 - When performing the v3 link handshake on a TLS connection, report
13689 that we have the x509 certificate that we actually used on that
13690 connection, even if we have changed certificates since that
13691 connection was first opened. Previously, we would claim to have
13692 used our most recent x509 link certificate, which would sometimes
13693 make the link handshake fail. Fixes one case of bug 22460; bugfix
13696 o Major bugfixes (relays, key management):
13697 - Regenerate link and authentication certificates whenever the key
13698 that signs them changes; also, regenerate link certificates
13699 whenever the signed key changes. Previously, these processes were
13700 only weakly coupled, and we relays could (for minutes to hours)
13701 wind up with an inconsistent set of keys and certificates, which
13702 other relays would not accept. Fixes two cases of bug 22460;
13703 bugfix on 0.3.0.1-alpha.
13704 - When sending an Ed25519 signing->link certificate in a CERTS cell,
13705 send the certificate that matches the x509 certificate that we
13706 used on the TLS connection. Previously, there was a race condition
13707 if the TLS context rotated after we began the TLS handshake but
13708 before we sent the CERTS cell. Fixes a case of bug 22460; bugfix
13711 o Major bugfixes (torrc, crash):
13712 - Fix a crash bug when using %include in torrc. Fixes bug 22417;
13713 bugfix on 0.3.1.1-alpha. Patch by Daniel Pinto.
13715 o Minor features (code style):
13716 - Add "Falls through" comments to our codebase, in order to silence
13717 GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
13718 Stieger. Closes ticket 22446.
13720 o Minor features (diagnostic):
13721 - Add logging messages to try to diagnose a rare bug that seems to
13722 generate RSA->Ed25519 cross-certificates dated in the 1970s. We
13723 think this is happening because of incorrect system clocks, but
13724 we'd like to know for certain. Diagnostic for bug 22466.
13726 o Minor bugfixes (correctness):
13727 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
13728 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
13730 o Minor bugfixes (directory protocol):
13731 - Check for libzstd >= 1.1, because older versions lack the
13732 necessary streaming API. Fixes bug 22413; bugfix on 0.3.1.1-alpha.
13734 o Minor bugfixes (link handshake):
13735 - Lower the lifetime of the RSA->Ed25519 cross-certificate to six
13736 months, and regenerate it when it is within one month of expiring.
13737 Previously, we had generated this certificate at startup with a
13738 ten-year lifetime, but that could lead to weird behavior when Tor
13739 was started with a grossly inaccurate clock. Mitigates bug 22466;
13740 mitigation on 0.3.0.1-alpha.
13742 o Minor bugfixes (storage directories):
13743 - Always check for underflows in the cached storage directory usage.
13744 If the usage does underflow, re-calculate it. Also, avoid a
13745 separate underflow when the usage is not known. Fixes bug 22424;
13746 bugfix on 0.3.1.1-alpha.
13748 o Minor bugfixes (unit tests):
13749 - The unit tests now pass on systems where localhost is misconfigured
13750 to some IPv4 address other than 127.0.0.1. Fixes bug 6298; bugfix
13754 - Clarify the manpage for the (deprecated) torify script. Closes
13757 Changes in version 0.3.0.8 - 2017-06-08
13758 Tor 0.3.0.8 fixes a pair of bugs that would allow an attacker to
13759 remotely crash a hidden service with an assertion failure. Anyone
13760 running a hidden service should upgrade to this version, or to some
13761 other version with fixes for TROVE-2017-004 and TROVE-2017-005.
13763 Tor 0.3.0.8 also includes fixes for several key management bugs
13764 that sometimes made relays unreliable, as well as several other
13765 bugfixes described below.
13767 o Major bugfixes (hidden service, relay, security, backport
13768 from 0.3.1.3-alpha):
13769 - Fix a remotely triggerable assertion failure when a hidden service
13770 handles a malformed BEGIN cell. Fixes bug 22493, tracked as
13771 TROVE-2017-004 and as CVE-2017-0375; bugfix on 0.3.0.1-alpha.
13772 - Fix a remotely triggerable assertion failure caused by receiving a
13773 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
13774 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
13777 o Major bugfixes (relay, link handshake, backport from 0.3.1.3-alpha):
13778 - When performing the v3 link handshake on a TLS connection, report
13779 that we have the x509 certificate that we actually used on that
13780 connection, even if we have changed certificates since that
13781 connection was first opened. Previously, we would claim to have
13782 used our most recent x509 link certificate, which would sometimes
13783 make the link handshake fail. Fixes one case of bug 22460; bugfix
13786 o Major bugfixes (relays, key management, backport from 0.3.1.3-alpha):
13787 - Regenerate link and authentication certificates whenever the key
13788 that signs them changes; also, regenerate link certificates
13789 whenever the signed key changes. Previously, these processes were
13790 only weakly coupled, and we relays could (for minutes to hours)
13791 wind up with an inconsistent set of keys and certificates, which
13792 other relays would not accept. Fixes two cases of bug 22460;
13793 bugfix on 0.3.0.1-alpha.
13794 - When sending an Ed25519 signing->link certificate in a CERTS cell,
13795 send the certificate that matches the x509 certificate that we
13796 used on the TLS connection. Previously, there was a race condition
13797 if the TLS context rotated after we began the TLS handshake but
13798 before we sent the CERTS cell. Fixes a case of bug 22460; bugfix
13801 o Major bugfixes (hidden service v3, backport from 0.3.1.1-alpha):
13802 - Stop rejecting v3 hidden service descriptors because their size
13803 did not match an old padding rule. Fixes bug 22447; bugfix on
13806 o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
13807 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
13808 December 2016 (of which ~126 were still functional) with a list of
13809 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
13810 2017. Resolves ticket 21564.
13812 o Minor bugfixes (configuration, backport from 0.3.1.1-alpha):
13813 - Do not crash when starting with LearnCircuitBuildTimeout 0. Fixes
13814 bug 22252; bugfix on 0.2.9.3-alpha.
13816 o Minor bugfixes (correctness, backport from 0.3.1.3-alpha):
13817 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
13818 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
13820 o Minor bugfixes (link handshake, backport from 0.3.1.3-alpha):
13821 - Lower the lifetime of the RSA->Ed25519 cross-certificate to six
13822 months, and regenerate it when it is within one month of expiring.
13823 Previously, we had generated this certificate at startup with a
13824 ten-year lifetime, but that could lead to weird behavior when Tor
13825 was started with a grossly inaccurate clock. Mitigates bug 22466;
13826 mitigation on 0.3.0.1-alpha.
13828 o Minor bugfixes (memory leak, directory authority, backport from
13830 - When directory authorities reject a router descriptor due to
13831 keypinning, free the router descriptor rather than leaking the
13832 memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
13835 Changes in version 0.2.9.11 - 2017-06-08
13836 Tor 0.2.9.11 backports a fix for a bug that would allow an attacker to
13837 remotely crash a hidden service with an assertion failure. Anyone
13838 running a hidden service should upgrade to this version, or to some
13839 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
13840 are not affected by TROVE-2017-004.)
13842 Tor 0.2.9.11 also backports fixes for several key management bugs
13843 that sometimes made relays unreliable, as well as several other
13844 bugfixes described below.
13846 o Major bugfixes (hidden service, relay, security, backport
13847 from 0.3.1.3-alpha):
13848 - Fix a remotely triggerable assertion failure caused by receiving a
13849 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
13850 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
13853 o Major bugfixes (relay, link handshake, backport from 0.3.1.3-alpha):
13854 - When performing the v3 link handshake on a TLS connection, report
13855 that we have the x509 certificate that we actually used on that
13856 connection, even if we have changed certificates since that
13857 connection was first opened. Previously, we would claim to have
13858 used our most recent x509 link certificate, which would sometimes
13859 make the link handshake fail. Fixes one case of bug 22460; bugfix
13862 o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
13863 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
13864 December 2016 (of which ~126 were still functional) with a list of
13865 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
13866 2017. Resolves ticket 21564.
13868 o Minor features (future-proofing, backport from 0.3.0.7):
13869 - Tor no longer refuses to download microdescriptors or descriptors if
13870 they are listed as "published in the future". This change will
13871 eventually allow us to stop listing meaningful "published" dates
13872 in microdescriptor consensuses, and thereby allow us to reduce the
13873 resources required to download consensus diffs by over 50%.
13874 Implements part of ticket 21642; implements part of proposal 275.
13876 o Minor features (directory authorities, backport from 0.3.0.4-rc)
13877 - Directory authorities now reject relays running versions
13878 0.2.9.1-alpha through 0.2.9.4-alpha, because those relays
13879 suffer from bug 20499 and don't keep their consensus cache
13880 up-to-date. Resolves ticket 20509.
13882 o Minor features (geoip):
13883 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
13886 o Minor bugfixes (control port, backport from 0.3.0.6):
13887 - The GETINFO extra-info/digest/<digest> command was broken because
13888 of a wrong base16 decode return value check, introduced when
13889 refactoring that API. Fixes bug 22034; bugfix on 0.2.9.1-alpha.
13891 o Minor bugfixes (correctness, backport from 0.3.1.3-alpha):
13892 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
13893 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
13895 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.0.7):
13896 - The getpid() system call is now permitted under the Linux seccomp2
13897 sandbox, to avoid crashing with versions of OpenSSL (and other
13898 libraries) that attempt to learn the process's PID by using the
13899 syscall rather than the VDSO code. Fixes bug 21943; bugfix
13902 o Minor bugfixes (memory leak, directory authority, backport
13903 from 0.3.1.2-alpha):
13904 - When directory authorities reject a router descriptor due to
13905 keypinning, free the router descriptor rather than leaking the
13906 memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
13908 Changes in version 0.2.8.14 - 2017-06-08
13909 Tor 0.2.7.8 backports a fix for a bug that would allow an attacker to
13910 remotely crash a hidden service with an assertion failure. Anyone
13911 running a hidden service should upgrade to this version, or to some
13912 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
13913 are not affected by TROVE-2017-004.)
13915 o Major bugfixes (hidden service, relay, security):
13916 - Fix a remotely triggerable assertion failure caused by receiving a
13917 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
13918 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
13921 o Minor features (geoip):
13922 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
13925 o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
13926 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
13927 December 2016 (of which ~126 were still functional) with a list of
13928 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
13929 2017. Resolves ticket 21564.
13931 o Minor bugfixes (correctness):
13932 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
13933 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
13935 Changes in version 0.2.7.8 - 2017-06-08
13936 Tor 0.2.7.8 backports a fix for a bug that would allow an attacker to
13937 remotely crash a hidden service with an assertion failure. Anyone
13938 running a hidden service should upgrade to this version, or to some
13939 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
13940 are not affected by TROVE-2017-004.)
13942 o Major bugfixes (hidden service, relay, security):
13943 - Fix a remotely triggerable assertion failure caused by receiving a
13944 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
13945 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
13948 o Minor features (geoip):
13949 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
13952 o Minor bugfixes (correctness):
13953 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
13954 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
13957 Changes in version 0.2.6.12 - 2017-06-08
13958 Tor 0.2.6.12 backports a fix for a bug that would allow an attacker to
13959 remotely crash a hidden service with an assertion failure. Anyone
13960 running a hidden service should upgrade to this version, or to some
13961 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
13962 are not affected by TROVE-2017-004.)
13964 o Major bugfixes (hidden service, relay, security):
13965 - Fix a remotely triggerable assertion failure caused by receiving a
13966 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
13967 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
13970 o Minor features (geoip):
13971 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
13974 o Minor bugfixes (correctness):
13975 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
13976 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
13978 Changes in version 0.2.5.14 - 2017-06-08
13979 Tor 0.2.5.14 backports a fix for a bug that would allow an attacker to
13980 remotely crash a hidden service with an assertion failure. Anyone
13981 running a hidden service should upgrade to this version, or to some
13982 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
13983 are not affected by TROVE-2017-004.)
13985 o Major bugfixes (hidden service, relay, security):
13986 - Fix a remotely triggerable assertion failure caused by receiving a
13987 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
13988 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
13991 o Minor features (geoip):
13992 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
13995 o Minor bugfixes (correctness):
13996 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
13997 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
13999 Changes in version 0.2.4.29 - 2017-06-08
14000 Tor 0.2.4.29 backports a fix for a bug that would allow an attacker to
14001 remotely crash a hidden service with an assertion failure. Anyone
14002 running a hidden service should upgrade to this version, or to some
14003 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
14004 are not affected by TROVE-2017-004.)
14006 o Major bugfixes (hidden service, relay, security):
14007 - Fix a remotely triggerable assertion failure caused by receiving a
14008 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
14009 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
14012 o Minor features (geoip):
14013 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
14016 o Minor bugfixes (correctness):
14017 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
14018 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
14021 Changes in version 0.3.1.2-alpha - 2017-05-26
14022 Tor 0.3.1.2-alpha is the second release in the 0.3.1.x series. It
14023 fixes a few bugs found while testing 0.3.1.1-alpha, including a
14024 memory corruption bug that affected relay stability.
14026 o Major bugfixes (crash, relay):
14027 - Fix a memory-corruption bug in relays that set MyFamily.
14028 Previously, they would double-free MyFamily elements when making
14029 the next descriptor or when changing their configuration. Fixes
14030 bug 22368; bugfix on 0.3.1.1-alpha.
14032 o Minor bugfixes (logging):
14033 - Log a better message when a directory authority replies to an
14034 upload with an unexpected status code. Fixes bug 11121; bugfix
14037 o Minor bugfixes (memory leak, directory authority):
14038 - When directory authorities reject a router descriptor due to
14039 keypinning, free the router descriptor rather than leaking the
14040 memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
14043 Changes in version 0.3.1.1-alpha - 2017-05-22
14044 Tor 0.3.1.1-alpha is the first release in the 0.3.1.x series. It
14045 reduces the bandwidth usage for Tor's directory protocol, adds some
14046 basic padding to resist netflow-based traffic analysis and to serve as
14047 the basis of other padding in the future, and adds rust support to the
14050 It also contains numerous other small features and improvements to
14051 security, correctness, and performance.
14053 Below are the changes since 0.3.0.7.
14055 o Major features (directory protocol):
14056 - Tor relays and authorities can now serve clients an abbreviated
14057 version of the consensus document, containing only the changes
14058 since an older consensus document that the client holds. Clients
14059 now request these documents when available. When both client and
14060 server use this new protocol, they will use far less bandwidth (up
14061 to 94% less) to keep the client's consensus up-to-date. Implements
14062 proposal 140; closes ticket 13339. Based on work by Daniel Martí.
14063 - Tor can now compress directory traffic with lzma or with zstd
14064 compression algorithms, which can deliver better bandwidth
14065 performance. Because lzma is computationally expensive, it's only
14066 used for documents that can be compressed once and served many
14067 times. Support for these algorithms requires that tor is built
14068 with the libzstd and/or liblzma libraries available. Implements
14069 proposal 278; closes ticket 21662.
14070 - Relays now perform the more expensive compression operations, and
14071 consensus diff generation, in worker threads. This separation
14072 avoids delaying the main thread when a new consensus arrives.
14074 o Major features (experimental):
14075 - Tor can now build modules written in Rust. To turn this on, pass
14076 the "--enable-rust" flag to the configure script. It's not time to
14077 get excited yet: currently, there is no actual Rust functionality
14078 beyond some simple glue code, and a notice at startup to tell you
14079 that Rust is running. Still, we hope that programmers and
14080 packagers will try building Tor with Rust support, so that we can
14081 find issues and solve portability problems. Closes ticket 22106.
14083 o Major features (traffic analysis resistance):
14084 - Connections between clients and relays now send a padding cell in
14085 each direction every 1.5 to 9.5 seconds (tunable via consensus
14086 parameters). This padding will not resist specialized
14087 eavesdroppers, but it should be enough to make many ISPs' routine
14088 network flow logging less useful in traffic analysis against
14091 Padding is negotiated using Tor's link protocol, so both relays
14092 and clients must upgrade for this to take effect. Clients may
14093 still send padding despite the relay's version by setting
14094 ConnectionPadding 1 in torrc, and may disable padding by setting
14095 ConnectionPadding 0 in torrc. Padding may be minimized for mobile
14096 users with the torrc option ReducedConnectionPadding. Implements
14097 Proposal 251 and Section 2 of Proposal 254; closes ticket 16861.
14098 - Relays will publish 24 hour totals of padding and non-padding cell
14099 counts to their extra-info descriptors, unless PaddingStatistics 0
14100 is set in torrc. These 24 hour totals are also rounded to
14101 multiples of 10000.
14103 o Major bugfixes (connection usage):
14104 - We use NETINFO cells to try to determine if both relays involved
14105 in a connection will agree on the canonical status of that
14106 connection. We prefer the connections where this is the case for
14107 extend cells, and try to close connections where relays disagree
14108 on their canonical status early. Also, we now prefer the oldest
14109 valid connection for extend cells. These two changes should reduce
14110 the number of long-term connections that are kept open between
14111 relays. Fixes bug 17604; bugfix on 0.2.5.5-alpha.
14112 - Relays now log hourly statistics (look for
14113 "channel_check_for_duplicates" lines) on the total number of
14114 connections to other relays. If the number of connections per
14115 relay is unexpectedly large, this log message is at notice level.
14116 Otherwise it is at info.
14118 o Major bugfixes (entry guards):
14119 - Don't block bootstrapping when a primary bridge is offline and we
14120 can't get its descriptor. Fixes bug 22325; fixes one case of bug
14121 21969; bugfix on 0.3.0.3-alpha.
14123 o Major bugfixes (linux TPROXY support):
14124 - Fix a typo that had prevented TPROXY-based transparent proxying
14125 from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
14126 Patch from "d4fq0fQAgoJ".
14128 o Minor features (security, windows):
14129 - Enable a couple of pieces of Windows hardening: one
14130 (HeapEnableTerminationOnCorruption) that has been on-by-default
14131 since Windows 8, and unavailable before Windows 7; and one
14132 (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
14133 affect us, but shouldn't do any harm. Closes ticket 21953.
14135 o Minor features (config options):
14136 - Allow "%include" directives in torrc configuration files. These
14137 directives import the settings from other files, or from all the
14138 files in a directory. Closes ticket 1922. Code by Daniel Pinto.
14139 - Make SAVECONF return an error when overwriting a torrc that has
14140 includes. Using SAVECONF with the FORCE option will allow it to
14141 overwrite torrc even if includes are used. Related to ticket 1922.
14142 - Add "GETINFO config-can-saveconf" to tell controllers if SAVECONF
14143 will work without the FORCE option. Related to ticket 1922.
14145 o Minor features (controller):
14146 - Warn the first time that a controller requests data in the long-
14147 deprecated 'GETINFO network-status' format. Closes ticket 21703.
14149 o Minor features (defaults):
14150 - The default value for UseCreateFast is now 0: clients which
14151 haven't yet received a consensus document will now use a proper
14152 ntor handshake to talk to their directory servers whenever they
14153 can. Closes ticket 21407.
14154 - Onion key rotation and expiry intervals are now defined as a
14155 network consensus parameter, per proposal 274. The default
14156 lifetime of an onion key is increased from 7 to 28 days. Old onion
14157 keys will expire after 7 days by default. This change will make
14158 consensus diffs much smaller, and save significant bandwidth.
14159 Closes ticket 21641.
14161 o Minor features (fallback directory list):
14162 - Update the fallback directory mirror whitelist and blacklist based
14163 on operator emails. Closes task 21121.
14164 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
14165 December 2016 (of which ~126 were still functional) with a list of
14166 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
14167 2017. Resolves ticket 21564.
14169 o Minor features (hidden services, logging):
14170 - Log a message when a hidden service descriptor has fewer
14171 introduction points than specified in
14172 HiddenServiceNumIntroductionPoints. Closes tickets 21598.
14173 - Log a message when a hidden service reaches its introduction point
14174 circuit limit, and when that limit is reset. Follow up to ticket
14175 21594; closes ticket 21622.
14176 - Warn user if multiple entries in EntryNodes and at least one
14177 HiddenService are used together. Pinning EntryNodes along with a
14178 hidden service can be possibly harmful; for instance see ticket
14179 14917 or 21155. Closes ticket 21155.
14181 o Minor features (linux seccomp2 sandbox):
14182 - We now have a document storage backend compatible with the Linux
14183 seccomp2 sandbox. This backend is used for consensus documents and
14184 diffs between them; in the long term, we'd like to use it for
14185 unparseable directory material too. Closes ticket 21645
14186 - Increase the maximum allowed size passed to mprotect(PROT_WRITE)
14187 from 1MB to 16MB. This was necessary with the glibc allocator in
14188 order to allow worker threads to allocate more memory -- which in
14189 turn is necessary because of our new use of worker threads for
14190 compression. Closes ticket 22096.
14192 o Minor features (logging):
14193 - Log files are no longer created world-readable by default.
14194 (Previously, most distributors would store the logs in a non-
14195 world-readable location to prevent inappropriate access. This
14196 change is an extra precaution.) Closes ticket 21729; patch
14199 o Minor features (performance):
14200 - Our Keccak (SHA-3) implementation now accesses memory more
14201 efficiently, especially on little-endian systems. Closes
14203 - Add an O(1) implementation of channel_find_by_global_id(), to
14204 speed some controller functions.
14206 o Minor features (relay, configuration):
14207 - The MyFamily option may now be repeated as many times as desired,
14208 for relays that want to configure large families. Closes ticket
14209 4998; patch by Daniel Pinto.
14211 o Minor features (safety):
14212 - Add an explicit check to extrainfo_parse_entry_from_string() for
14213 NULL inputs. We don't believe this can actually happen, but it may
14214 help silence a warning from the Clang analyzer. Closes
14217 o Minor features (testing):
14218 - Add a "--disable-memory-sentinels" feature to help with fuzzing.
14219 When Tor is compiled with this option, we disable a number of
14220 redundant memory-safety failsafes that are intended to stop bugs
14221 from becoming security issues. This makes it easier to hunt for
14222 bugs that would be security issues without the failsafes turned
14223 on. Closes ticket 21439.
14224 - Add a general event-tracing instrumentation support to Tor. This
14225 subsystem will enable developers and researchers to add fine-
14226 grained instrumentation to their Tor instances, for use when
14227 examining Tor network performance issues. There are no trace
14228 events yet, and event-tracing is off by default unless enabled at
14229 compile time. Implements ticket 13802.
14230 - Improve our version parsing tests: add tests for typical version
14231 components, add tests for invalid versions, including numeric
14232 range and non-numeric prefixes. Unit tests 21278, 21450, and
14233 21507. Partially implements 21470.
14235 o Minor bugfixes (bandwidth accounting):
14236 - Roll over monthly accounting at the configured hour and minute,
14237 rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
14238 Found by Andrey Karpov with PVS-Studio.
14240 o Minor bugfixes (code correctness):
14241 - Accurately identify client connections by their lack of peer
14242 authentication. This means that we bail out earlier if asked to
14243 extend to a client. Follow-up to 21407. Fixes bug 21406; bugfix
14246 o Minor bugfixes (configuration):
14247 - Do not crash when starting with LearnCircuitBuildTimeout 0. Fixes
14248 bug 22252; bugfix on 0.2.9.3-alpha.
14250 o Minor bugfixes (connection lifespan):
14251 - Allow more control over how long TLS connections are kept open:
14252 unify CircuitIdleTimeout and PredictedPortsRelevanceTime into a
14253 single option called CircuitsAvailableTimeout. Also, allow the
14254 consensus to control the default values for both this preference
14255 and the lifespan of relay-to-relay connections. Fixes bug 17592;
14256 bugfix on 0.2.5.5-alpha.
14257 - Increase the initial circuit build timeout testing frequency, to
14258 help ensure that ReducedConnectionPadding clients finish learning
14259 a timeout before their orconn would expire. The initial testing
14260 rate was set back in the days of TAP and before the Tor Browser
14261 updater, when we had to be much more careful about new clients
14262 making lots of circuits. With this change, a circuit build timeout
14263 is learned in about 15-20 minutes, instead of 100-120 minutes.
14265 o Minor bugfixes (controller):
14266 - GETINFO onions/current and onions/detached no longer respond with
14267 551 on empty lists. Fixes bug 21329; bugfix on 0.2.7.1-alpha.
14268 - Trigger HS descriptor events on the control port when the client
14269 fails to pick a hidden service directory for a hidden service.
14270 This can happen if all the hidden service directories are in
14271 ExcludeNodes, or they have all been queried within the last 15
14272 minutes. Fixes bug 22042; bugfix on 0.2.5.2-alpha.
14274 o Minor bugfixes (directory authority):
14275 - When rejecting a router descriptor for running an obsolete version
14276 of Tor without ntor support, warn about the obsolete tor version,
14277 not the missing ntor key. Fixes bug 20270; bugfix on 0.2.9.3-alpha.
14278 - Prevent the shared randomness subsystem from asserting when
14279 initialized by a bridge authority with an incomplete configuration
14280 file. Fixes bug 21586; bugfix on 0.2.9.8.
14282 o Minor bugfixes (exit-side DNS):
14283 - Fix an untriggerable assertion that checked the output of a
14284 libevent DNS error, so that the assertion actually behaves as
14285 expected. Fixes bug 22244; bugfix on 0.2.0.20-rc. Found by Andrey
14286 Karpov using PVS-Studio.
14288 o Minor bugfixes (fallback directories):
14289 - Make the usage example in updateFallbackDirs.py actually work, and
14290 explain what it does. Fixes bug 22270; bugfix on 0.3.0.3-alpha.
14291 - Decrease the guard flag average required to be a fallback. This
14292 allows us to keep relays that have their guard flag removed when
14293 they restart. Fixes bug 20913; bugfix on 0.2.8.1-alpha.
14294 - Decrease the minimum number of fallbacks to 100. Fixes bug 20913;
14295 bugfix on 0.2.8.1-alpha.
14296 - Make sure fallback directory mirrors have the same address, port,
14297 and relay identity key for at least 30 days before they are
14298 selected. Fixes bug 20913; bugfix on 0.2.8.1-alpha.
14300 o Minor bugfixes (hidden services):
14301 - Stop printing a cryptic warning when a hidden service gets a
14302 request to connect to a virtual port that it hasn't configured.
14303 Fixes bug 16706; bugfix on 0.2.6.3-alpha.
14304 - Simplify hidden service descriptor creation by using an existing
14305 flag to check if an introduction point is established. Fixes bug
14306 21599; bugfix on 0.2.7.2-alpha.
14308 o Minor bugfixes (memory leak):
14309 - Fix a small memory leak at exit from the backtrace handler code.
14310 Fixes bug 21788; bugfix on 0.2.5.2-alpha. Patch from Daniel Pinto.
14312 o Minor bugfixes (protocol, logging):
14313 - Downgrade a log statement about unexpected relay cells from "bug"
14314 to "protocol warning", because there is at least one use case
14315 where it can be triggered by a buggy tor implementation. Fixes bug
14316 21293; bugfix on 0.1.1.14-alpha.
14318 o Minor bugfixes (testing):
14319 - Use unbuffered I/O for utility functions around the
14320 process_handle_t type. This fixes unit test failures reported on
14321 OpenBSD and FreeBSD. Fixes bug 21654; bugfix on 0.2.3.1-alpha.
14322 - Make display of captured unit test log messages consistent. Fixes
14323 bug 21510; bugfix on 0.2.9.3-alpha.
14324 - Make test-network.sh always call chutney's test-network.sh.
14325 Previously, this only worked on systems which had bash installed,
14326 due to some bash-specific code in the script. Fixes bug 19699;
14327 bugfix on 0.3.0.4-rc. Follow-up to ticket 21581.
14329 o Minor bugfixes (voting consistency):
14330 - Reject version numbers with non-numeric prefixes (such as +, -, or
14331 whitespace). Disallowing whitespace prevents differential version
14332 parsing between POSIX-based and Windows platforms. Fixes bug 21507
14333 and part of 21508; bugfix on 0.0.8pre1.
14335 o Minor bugfixes (windows, relay):
14336 - Resolve "Failure from drain_fd: No error" warnings on Windows
14337 relays. Fixes bug 21540; bugfix on 0.2.6.3-alpha.
14339 o Code simplification and refactoring:
14340 - Break up the 630-line function connection_dir_client_reached_eof()
14341 into a dozen smaller functions. This change should help
14342 maintainability and readability of the client directory code.
14343 - Isolate our use of the openssl headers so that they are only
14344 included from our crypto wrapper modules, and from tests that
14345 examine those modules' internals. Closes ticket 21841.
14346 - Simplify our API to launch directory requests, making it more
14347 extensible and less error-prone. Now it's easier to add extra
14348 headers to directory requests. Closes ticket 21646.
14349 - Our base64 decoding functions no longer overestimate the output
14350 space that they need when parsing unpadded inputs. Closes
14352 - Remove unused "ROUTER_ADDED_NOTIFY_GENERATOR" internal value.
14353 Resolves ticket 22213.
14354 - The logic that directory caches use to spool request to clients,
14355 serving them one part at a time so as not to allocate too much
14356 memory, has been refactored for consistency. Previously there was
14357 a separate spooling implementation per type of spoolable data. Now
14358 there is one common spooling implementation, with extensible data
14359 types. Closes ticket 21651.
14360 - Tor's compression module now supports multiple backends. Part of
14361 the implementation for proposal 278; closes ticket 21663.
14364 - Clarify the behavior of the KeepAliveIsolateSOCKSAuth sub-option.
14365 Closes ticket 21873.
14366 - Correct documentation about the default DataDirectory value.
14367 Closes ticket 21151.
14368 - Document the default behavior of NumEntryGuards and
14369 NumDirectoryGuards correctly. Fixes bug 21715; bugfix
14371 - Document key=value pluggable transport arguments for Bridge lines
14372 in torrc. Fixes bug 20341; bugfix on 0.2.5.1-alpha.
14373 - Note that bandwidth-limiting options don't affect TCP headers or
14374 DNS. Closes ticket 17170.
14376 o Removed features (configuration options, all in ticket 22060):
14377 - These configuration options are now marked Obsolete, and no longer
14378 have any effect: AllowInvalidNodes, AllowSingleHopCircuits,
14379 AllowSingleHopExits, ExcludeSingleHopRelays, FastFirstHopPK,
14380 TLSECGroup, WarnUnsafeSocks. They were first marked as deprecated
14381 in 0.2.9.2-alpha and have now been removed. The previous default
14382 behavior is now always chosen; the previous (less secure) non-
14383 default behavior is now unavailable.
14384 - CloseHSClientCircuitsImmediatelyOnTimeout and
14385 CloseHSServiceRendCircuitsImmediatelyOnTimeout were deprecated in
14386 0.2.9.2-alpha and now have been removed. HS circuits never close
14387 on circuit build timeout; they have a longer timeout period.
14388 - {Control,DNS,Dir,Socks,Trans,NATD,OR}ListenAddress were deprecated
14389 in 0.2.9.2-alpha and now have been removed. Use the ORPort option
14390 (and others) to configure listen-only and advertise-only addresses.
14392 o Removed features (tools):
14393 - We've removed the tor-checkkey tool from src/tools. Long ago, we
14394 used it to help people detect RSA keys that were generated by
14395 versions of Debian affected by CVE-2008-0166. But those keys have
14396 been out of circulation for ages, and this tool is no longer
14397 required. Closes ticket 21842.
14400 Changes in version 0.3.0.7 - 2017-05-15
14401 Tor 0.3.0.7 fixes a medium-severity security bug in earlier versions
14402 of Tor 0.3.0.x, where an attacker could cause a Tor relay process
14403 to exit. Relays running earlier versions of Tor 0.3.0.x should upgrade;
14404 clients are not affected.
14406 o Major bugfixes (hidden service directory, security):
14407 - Fix an assertion failure in the hidden service directory code, which
14408 could be used by an attacker to remotely cause a Tor relay process to
14409 exit. Relays running earlier versions of Tor 0.3.0.x should upgrade.
14410 should upgrade. This security issue is tracked as TROVE-2017-002.
14411 Fixes bug 22246; bugfix on 0.3.0.1-alpha.
14414 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
14417 o Minor features (future-proofing):
14418 - Tor no longer refuses to download microdescriptors or descriptors
14419 if they are listed as "published in the future". This change will
14420 eventually allow us to stop listing meaningful "published" dates
14421 in microdescriptor consensuses, and thereby allow us to reduce the
14422 resources required to download consensus diffs by over 50%.
14423 Implements part of ticket 21642; implements part of proposal 275.
14425 o Minor bugfixes (Linux seccomp2 sandbox):
14426 - The getpid() system call is now permitted under the Linux seccomp2
14427 sandbox, to avoid crashing with versions of OpenSSL (and other
14428 libraries) that attempt to learn the process's PID by using the
14429 syscall rather than the VDSO code. Fixes bug 21943; bugfix
14433 Changes in version 0.3.0.6 - 2017-04-26
14434 Tor 0.3.0.6 is the first stable release of the Tor 0.3.0 series.
14436 With the 0.3.0 series, clients and relays now use Ed25519 keys to
14437 authenticate their link connections to relays, rather than the old
14438 RSA1024 keys that they used before. (Circuit crypto has been
14439 Curve25519-authenticated since 0.2.4.8-alpha.) We have also replaced
14440 the guard selection and replacement algorithm to behave more robustly
14441 in the presence of unreliable networks, and to resist guard-
14444 This series also includes numerous other small features and bugfixes,
14445 along with more groundwork for the upcoming hidden-services revamp.
14447 Per our stable release policy, we plan to support the Tor 0.3.0
14448 release series for at least the next nine months, or for three months
14449 after the first stable release of the 0.3.1 series: whichever is
14450 longer. If you need a release with long-term support, we recommend
14451 that you stay with the 0.2.9 series.
14453 Below are the changes since 0.3.0.5-rc. For a list of all changes
14454 since 0.2.9, see the ReleaseNotes file.
14456 o Minor features (geoip):
14457 - Update geoip and geoip6 to the April 4 2017 Maxmind GeoLite2
14460 o Minor bugfixes (control port):
14461 - The GETINFO extra-info/digest/<digest> command was broken because
14462 of a wrong base16 decode return value check, introduced when
14463 refactoring that API. Fixes bug 22034; bugfix on 0.2.9.1-alpha.
14465 o Minor bugfixes (crash prevention):
14466 - Fix a (currently untriggerable, but potentially dangerous) crash
14467 bug when base32-encoding inputs whose sizes are not a multiple of
14468 5. Fixes bug 21894; bugfix on 0.2.9.1-alpha.
14471 Changes in version 0.3.0.5-rc - 2017-04-05
14472 Tor 0.3.0.5-rc fixes a few remaining bugs, large and small, in the
14473 0.3.0 release series.
14475 This is the second release candidate in the Tor 0.3.0 series, and has
14476 much fewer changes than the first. If we find no new bugs or
14477 regressions here, the first stable 0.3.0 release will be nearly
14480 o Major bugfixes (crash, directory connections):
14481 - Fix a rare crash when sending a begin cell on a circuit whose
14482 linked directory connection had already been closed. Fixes bug
14483 21576; bugfix on 0.2.9.3-alpha. Reported by Alec Muffett.
14485 o Major bugfixes (guard selection):
14486 - Fix a guard selection bug where Tor would refuse to bootstrap in
14487 some cases if the user swapped a bridge for another bridge in
14488 their configuration file. Fixes bug 21771; bugfix on 0.3.0.1-alpha.
14489 Reported by "torvlnt33r".
14491 o Minor features (geoip):
14492 - Update geoip and geoip6 to the March 7 2017 Maxmind GeoLite2
14495 o Minor bugfix (compilation):
14496 - Fix a warning when compiling hs_service.c. Previously, it had no
14497 exported symbols when compiled for libor.a, resulting in a
14498 compilation warning from clang. Fixes bug 21825; bugfix
14501 o Minor bugfixes (hidden services):
14502 - Make hidden services check for failed intro point connections,
14503 even when they have exceeded their intro point creation limit.
14504 Fixes bug 21596; bugfix on 0.2.7.2-alpha. Reported by Alec Muffett.
14505 - Make hidden services with 8 to 10 introduction points check for
14506 failed circuits immediately after startup. Previously, they would
14507 wait for 5 minutes before performing their first checks. Fixes bug
14508 21594; bugfix on 0.2.3.9-alpha. Reported by Alec Muffett.
14510 o Minor bugfixes (memory leaks):
14511 - Fix a memory leak when using GETCONF on a port option. Fixes bug
14512 21682; bugfix on 0.3.0.3-alpha.
14514 o Minor bugfixes (relay):
14515 - Avoid a double-marked-circuit warning that could happen when we
14516 receive DESTROY cells under heavy load. Fixes bug 20059; bugfix
14519 o Minor bugfixes (tests):
14520 - Run the entry_guard_parse_from_state_full() test with the time set
14521 to a specific date. (The guard state that this test was parsing
14522 contained guards that had expired since the test was first
14523 written.) Fixes bug 21799; bugfix on 0.3.0.1-alpha.
14526 - Update the description of the directory server options in the
14527 manual page, to clarify that a relay no longer needs to set
14528 DirPort in order to be a directory cache. Closes ticket 21720.
14532 Changes in version 0.2.8.13 - 2017-03-03
14533 Tor 0.2.8.13 backports a security fix from later Tor
14534 releases. Anybody running Tor 0.2.8.12 or earlier should upgrade to this
14535 this release, if for some reason they cannot upgrade to a later
14536 release series, and if they build Tor with the --enable-expensive-hardening
14539 Note that support for Tor 0.2.8.x is ending next year: we will not issue
14540 any fixes for the Tor 0.2.8.x series after 1 Jan 2018. If you need
14541 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
14543 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
14544 - Fix an integer underflow bug when comparing malformed Tor
14545 versions. This bug could crash Tor when built with
14546 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
14547 0.2.9.8, which were built with -ftrapv by default. In other cases
14548 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
14549 on 0.0.8pre1. Found by OSS-Fuzz.
14551 o Minor features (geoip):
14552 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
14556 Changes in version 0.2.7.7 - 2017-03-03
14557 Tor 0.2.7.7 backports a number of security fixes from later Tor
14558 releases. Anybody running Tor 0.2.7.6 or earlier should upgrade to
14559 this release, if for some reason they cannot upgrade to a later
14562 Note that support for Tor 0.2.7.x is ending this year: we will not issue
14563 any fixes for the Tor 0.2.7.x series after 1 August 2017. If you need
14564 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
14566 o Directory authority changes (backport from 0.2.8.5-rc):
14567 - Urras is no longer a directory authority. Closes ticket 19271.
14569 o Directory authority changes (backport from 0.2.9.2-alpha):
14570 - The "Tonga" bridge authority has been retired; the new bridge
14571 authority is "Bifroest". Closes tickets 19728 and 19690.
14573 o Directory authority key updates (backport from 0.2.8.1-alpha):
14574 - Update the V3 identity key for the dannenberg directory authority:
14575 it was changed on 18 November 2015. Closes task 17906. Patch
14578 o Major bugfixes (parsing, security, backport from 0.2.9.8):
14579 - Fix a bug in parsing that could cause clients to read a single
14580 byte past the end of an allocated region. This bug could be used
14581 to cause hardened clients (built with --enable-expensive-hardening)
14582 to crash if they tried to visit a hostile hidden service. Non-
14583 hardened clients are only affected depending on the details of
14584 their platform's memory allocator. Fixes bug 21018; bugfix on
14585 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
14586 2016-12-002 and as CVE-2016-1254.
14588 o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
14589 - Stop a crash that could occur when a client running with DNSPort
14590 received a query with multiple address types, and the first
14591 address type was not supported. Found and fixed by Scott Dial.
14592 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
14593 - Prevent a class of security bugs caused by treating the contents
14594 of a buffer chunk as if they were a NUL-terminated string. At
14595 least one such bug seems to be present in all currently used
14596 versions of Tor, and would allow an attacker to remotely crash
14597 most Tor instances, especially those compiled with extra compiler
14598 hardening. With this defense in place, such bugs can't crash Tor,
14599 though we should still fix them as they occur. Closes ticket
14600 20384 (TROVE-2016-10-001).
14602 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
14603 - Avoid a difficult-to-trigger heap corruption attack when extending
14604 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
14605 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
14606 Reported by Guido Vranken.
14608 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
14609 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
14610 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
14612 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
14613 - If OpenSSL fails to generate an RSA key, do not retain a dangling
14614 pointer to the previous (uninitialized) key value. The impact here
14615 should be limited to a difficult-to-trigger crash, if OpenSSL is
14616 running an engine that makes key generation failures possible, or
14617 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
14618 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
14621 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
14622 - Fix an integer underflow bug when comparing malformed Tor
14623 versions. This bug could crash Tor when built with
14624 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
14625 0.2.9.8, which were built with -ftrapv by default. In other cases
14626 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
14627 on 0.0.8pre1. Found by OSS-Fuzz.
14629 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
14630 - Make memwipe() do nothing when passed a NULL pointer or buffer of
14631 zero size. Check size argument to memwipe() for underflow. Fixes
14632 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
14635 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
14636 - Make Tor survive errors involving connections without a
14637 corresponding event object. Previously we'd fail with an
14638 assertion; now we produce a log message. Related to bug 16248.
14640 o Minor features (geoip):
14641 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
14645 Changes in version 0.2.6.11 - 2017-03-03
14646 Tor 0.2.6.11 backports a number of security fixes from later Tor
14647 releases. Anybody running Tor 0.2.6.10 or earlier should upgrade to
14648 this release, if for some reason they cannot upgrade to a later
14651 Note that support for Tor 0.2.6.x is ending this year: we will not issue
14652 any fixes for the Tor 0.2.6.x series after 1 August 2017. If you need
14653 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
14655 o Directory authority changes (backport from 0.2.8.5-rc):
14656 - Urras is no longer a directory authority. Closes ticket 19271.
14658 o Directory authority changes (backport from 0.2.9.2-alpha):
14659 - The "Tonga" bridge authority has been retired; the new bridge
14660 authority is "Bifroest". Closes tickets 19728 and 19690.
14662 o Directory authority key updates (backport from 0.2.8.1-alpha):
14663 - Update the V3 identity key for the dannenberg directory authority:
14664 it was changed on 18 November 2015. Closes task 17906. Patch
14667 o Major features (security fixes, backport from 0.2.9.4-alpha):
14668 - Prevent a class of security bugs caused by treating the contents
14669 of a buffer chunk as if they were a NUL-terminated string. At
14670 least one such bug seems to be present in all currently used
14671 versions of Tor, and would allow an attacker to remotely crash
14672 most Tor instances, especially those compiled with extra compiler
14673 hardening. With this defense in place, such bugs can't crash Tor,
14674 though we should still fix them as they occur. Closes ticket
14675 20384 (TROVE-2016-10-001).
14677 o Major bugfixes (parsing, security, backport from 0.2.9.8):
14678 - Fix a bug in parsing that could cause clients to read a single
14679 byte past the end of an allocated region. This bug could be used
14680 to cause hardened clients (built with --enable-expensive-hardening)
14681 to crash if they tried to visit a hostile hidden service. Non-
14682 hardened clients are only affected depending on the details of
14683 their platform's memory allocator. Fixes bug 21018; bugfix on
14684 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
14685 2016-12-002 and as CVE-2016-1254.
14687 o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
14688 - Stop a crash that could occur when a client running with DNSPort
14689 received a query with multiple address types, and the first
14690 address type was not supported. Found and fixed by Scott Dial.
14691 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
14693 o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
14694 - Fix an error that could cause us to read 4 bytes before the
14695 beginning of an openssl string. This bug could be used to cause
14696 Tor to crash on systems with unusual malloc implementations, or
14697 systems with unusual hardening installed. Fixes bug 17404; bugfix
14700 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
14701 - Avoid a difficult-to-trigger heap corruption attack when extending
14702 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
14703 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
14704 Reported by Guido Vranken.
14706 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
14707 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
14708 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
14710 o Major bugfixes (guard selection, backport from 0.2.7.6):
14711 - Actually look at the Guard flag when selecting a new directory
14712 guard. When we implemented the directory guard design, we
14713 accidentally started treating all relays as if they have the Guard
14714 flag during guard selection, leading to weaker anonymity and worse
14715 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
14718 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
14719 - If OpenSSL fails to generate an RSA key, do not retain a dangling
14720 pointer to the previous (uninitialized) key value. The impact here
14721 should be limited to a difficult-to-trigger crash, if OpenSSL is
14722 running an engine that makes key generation failures possible, or
14723 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
14724 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
14727 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
14728 - Fix an integer underflow bug when comparing malformed Tor
14729 versions. This bug could crash Tor when built with
14730 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
14731 0.2.9.8, which were built with -ftrapv by default. In other cases
14732 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
14733 on 0.0.8pre1. Found by OSS-Fuzz.
14735 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
14736 - Make memwipe() do nothing when passed a NULL pointer or buffer of
14737 zero size. Check size argument to memwipe() for underflow. Fixes
14738 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
14741 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
14742 - Make Tor survive errors involving connections without a
14743 corresponding event object. Previously we'd fail with an
14744 assertion; now we produce a log message. Related to bug 16248.
14746 o Minor features (geoip):
14747 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
14750 o Minor bugfixes (compilation, backport from 0.2.7.6):
14751 - Fix a compilation warning with Clang 3.6: Do not check the
14752 presence of an address which can never be NULL. Fixes bug 17781.
14755 Changes in version 0.2.5.13 - 2017-03-03
14756 Tor 0.2.5.13 backports a number of security fixes from later Tor
14757 releases. Anybody running Tor 0.2.5.13 or earlier should upgrade to
14758 this release, if for some reason they cannot upgrade to a later
14761 Note that support for Tor 0.2.5.x is ending next year: we will not issue
14762 any fixes for the Tor 0.2.5.x series after 1 May 2018. If you need
14763 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
14765 o Directory authority changes (backport from 0.2.8.5-rc):
14766 - Urras is no longer a directory authority. Closes ticket 19271.
14768 o Directory authority changes (backport from 0.2.9.2-alpha):
14769 - The "Tonga" bridge authority has been retired; the new bridge
14770 authority is "Bifroest". Closes tickets 19728 and 19690.
14772 o Directory authority key updates (backport from 0.2.8.1-alpha):
14773 - Update the V3 identity key for the dannenberg directory authority:
14774 it was changed on 18 November 2015. Closes task 17906. Patch
14777 o Major features (security fixes, backport from 0.2.9.4-alpha):
14778 - Prevent a class of security bugs caused by treating the contents
14779 of a buffer chunk as if they were a NUL-terminated string. At
14780 least one such bug seems to be present in all currently used
14781 versions of Tor, and would allow an attacker to remotely crash
14782 most Tor instances, especially those compiled with extra compiler
14783 hardening. With this defense in place, such bugs can't crash Tor,
14784 though we should still fix them as they occur. Closes ticket
14785 20384 (TROVE-2016-10-001).
14787 o Major bugfixes (parsing, security, backport from 0.2.9.8):
14788 - Fix a bug in parsing that could cause clients to read a single
14789 byte past the end of an allocated region. This bug could be used
14790 to cause hardened clients (built with --enable-expensive-hardening)
14791 to crash if they tried to visit a hostile hidden service. Non-
14792 hardened clients are only affected depending on the details of
14793 their platform's memory allocator. Fixes bug 21018; bugfix on
14794 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
14795 2016-12-002 and as CVE-2016-1254.
14797 o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
14798 - Stop a crash that could occur when a client running with DNSPort
14799 received a query with multiple address types, and the first
14800 address type was not supported. Found and fixed by Scott Dial.
14801 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
14803 o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
14804 - Fix an error that could cause us to read 4 bytes before the
14805 beginning of an openssl string. This bug could be used to cause
14806 Tor to crash on systems with unusual malloc implementations, or
14807 systems with unusual hardening installed. Fixes bug 17404; bugfix
14810 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
14811 - Avoid a difficult-to-trigger heap corruption attack when extending
14812 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
14813 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
14814 Reported by Guido Vranken.
14816 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
14817 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
14818 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
14820 o Major bugfixes (guard selection, backport from 0.2.7.6):
14821 - Actually look at the Guard flag when selecting a new directory
14822 guard. When we implemented the directory guard design, we
14823 accidentally started treating all relays as if they have the Guard
14824 flag during guard selection, leading to weaker anonymity and worse
14825 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
14828 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
14829 - If OpenSSL fails to generate an RSA key, do not retain a dangling
14830 pointer to the previous (uninitialized) key value. The impact here
14831 should be limited to a difficult-to-trigger crash, if OpenSSL is
14832 running an engine that makes key generation failures possible, or
14833 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
14834 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
14837 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
14838 - Fix an integer underflow bug when comparing malformed Tor
14839 versions. This bug could crash Tor when built with
14840 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
14841 0.2.9.8, which were built with -ftrapv by default. In other cases
14842 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
14843 on 0.0.8pre1. Found by OSS-Fuzz.
14845 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
14846 - Make memwipe() do nothing when passed a NULL pointer or buffer of
14847 zero size. Check size argument to memwipe() for underflow. Fixes
14848 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
14851 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
14852 - Make Tor survive errors involving connections without a
14853 corresponding event object. Previously we'd fail with an
14854 assertion; now we produce a log message. Related to bug 16248.
14856 o Minor features (geoip):
14857 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
14860 o Minor bugfixes (compilation, backport from 0.2.7.6):
14861 - Fix a compilation warning with Clang 3.6: Do not check the
14862 presence of an address which can never be NULL. Fixes bug 17781.
14864 o Minor bugfixes (crypto error-handling, backport from 0.2.7.2-alpha):
14865 - Check for failures from crypto_early_init, and refuse to continue.
14866 A previous typo meant that we could keep going with an
14867 uninitialized crypto library, and would have OpenSSL initialize
14868 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
14869 when implementing ticket 4900. Patch by "teor".
14871 o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
14872 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
14873 a client authorized hidden service. Fixes bug 15823; bugfix
14877 Changes in version 0.2.4.28 - 2017-03-03
14878 Tor 0.2.4.28 backports a number of security fixes from later Tor
14879 releases. Anybody running Tor 0.2.4.27 or earlier should upgrade to
14880 this release, if for some reason they cannot upgrade to a later
14883 Note that support for Tor 0.2.4.x is ending soon: we will not issue
14884 any fixes for the Tor 0.2.4.x series after 1 August 2017. If you need
14885 a Tor release series with long-term support, we recommend Tor 0.2.9.x.
14887 o Directory authority changes (backport from 0.2.8.5-rc):
14888 - Urras is no longer a directory authority. Closes ticket 19271.
14890 o Directory authority changes (backport from 0.2.9.2-alpha):
14891 - The "Tonga" bridge authority has been retired; the new bridge
14892 authority is "Bifroest". Closes tickets 19728 and 19690.
14894 o Directory authority key updates (backport from 0.2.8.1-alpha):
14895 - Update the V3 identity key for the dannenberg directory authority:
14896 it was changed on 18 November 2015. Closes task 17906. Patch
14899 o Major features (security fixes, backport from 0.2.9.4-alpha):
14900 - Prevent a class of security bugs caused by treating the contents
14901 of a buffer chunk as if they were a NUL-terminated string. At
14902 least one such bug seems to be present in all currently used
14903 versions of Tor, and would allow an attacker to remotely crash
14904 most Tor instances, especially those compiled with extra compiler
14905 hardening. With this defense in place, such bugs can't crash Tor,
14906 though we should still fix them as they occur. Closes ticket
14907 20384 (TROVE-2016-10-001).
14909 o Major bugfixes (parsing, security, backport from 0.2.9.8):
14910 - Fix a bug in parsing that could cause clients to read a single
14911 byte past the end of an allocated region. This bug could be used
14912 to cause hardened clients (built with --enable-expensive-hardening)
14913 to crash if they tried to visit a hostile hidden service. Non-
14914 hardened clients are only affected depending on the details of
14915 their platform's memory allocator. Fixes bug 21018; bugfix on
14916 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
14917 2016-12-002 and as CVE-2016-1254.
14919 o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
14920 - Fix an error that could cause us to read 4 bytes before the
14921 beginning of an openssl string. This bug could be used to cause
14922 Tor to crash on systems with unusual malloc implementations, or
14923 systems with unusual hardening installed. Fixes bug 17404; bugfix
14926 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
14927 - Avoid a difficult-to-trigger heap corruption attack when extending
14928 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
14929 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
14930 Reported by Guido Vranken.
14932 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
14933 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
14934 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
14936 o Major bugfixes (guard selection, backport from 0.2.7.6):
14937 - Actually look at the Guard flag when selecting a new directory
14938 guard. When we implemented the directory guard design, we
14939 accidentally started treating all relays as if they have the Guard
14940 flag during guard selection, leading to weaker anonymity and worse
14941 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
14944 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
14945 - If OpenSSL fails to generate an RSA key, do not retain a dangling
14946 pointer to the previous (uninitialized) key value. The impact here
14947 should be limited to a difficult-to-trigger crash, if OpenSSL is
14948 running an engine that makes key generation failures possible, or
14949 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
14950 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
14953 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
14954 - Fix an integer underflow bug when comparing malformed Tor
14955 versions. This bug could crash Tor when built with
14956 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
14957 0.2.9.8, which were built with -ftrapv by default. In other cases
14958 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
14959 on 0.0.8pre1. Found by OSS-Fuzz.
14961 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
14962 - Make memwipe() do nothing when passed a NULL pointer or buffer of
14963 zero size. Check size argument to memwipe() for underflow. Fixes
14964 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
14967 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
14968 - Make Tor survive errors involving connections without a
14969 corresponding event object. Previously we'd fail with an
14970 assertion; now we produce a log message. Related to bug 16248.
14972 o Minor features (DoS-resistance, backport from 0.2.7.1-alpha):
14973 - Make it harder for attackers to overload hidden services with
14974 introductions, by blocking multiple introduction requests on the
14975 same circuit. Resolves ticket 15515.
14977 o Minor features (geoip):
14978 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
14981 o Minor bugfixes (compilation, backport from 0.2.7.6):
14982 - Fix a compilation warning with Clang 3.6: Do not check the
14983 presence of an address which can never be NULL. Fixes bug 17781.
14985 o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
14986 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
14987 a client authorized hidden service. Fixes bug 15823; bugfix
14991 Changes in version 0.3.0.4-rc - 2017-03-01
14992 Tor 0.3.0.4-rc fixes some remaining bugs, large and small, in the
14993 0.3.0 release series, and introduces a few reliability features to
14994 keep them from coming back.
14996 This is the first release candidate in the Tor 0.3.0 series. If we
14997 find no new bugs or regressions here, the first stable 0.3.0 release
14998 will be nearly identical to it.
15000 o Major bugfixes (bridges):
15001 - When the same bridge is configured multiple times with the same
15002 identity, but at different address:port combinations, treat those
15003 bridge instances as separate guards. This fix restores the ability
15004 of clients to configure the same bridge with multiple pluggable
15005 transports. Fixes bug 21027; bugfix on 0.3.0.1-alpha.
15007 o Major bugfixes (hidden service directory v3):
15008 - Stop crashing on a failed v3 hidden service descriptor lookup
15009 failure. Fixes bug 21471; bugfixes on 0.3.0.1-alpha.
15011 o Major bugfixes (parsing):
15012 - When parsing a malformed content-length field from an HTTP
15013 message, do not read off the end of the buffer. This bug was a
15014 potential remote denial-of-service attack against Tor clients and
15015 relays. A workaround was released in October 2016, to prevent this
15016 bug from crashing Tor. This is a fix for the underlying issue,
15017 which should no longer matter (if you applied the earlier patch).
15018 Fixes bug 20894; bugfix on 0.2.0.16-alpha. Bug found by fuzzing
15019 using AFL (http://lcamtuf.coredump.cx/afl/).
15020 - Fix an integer underflow bug when comparing malformed Tor
15021 versions. This bug could crash Tor when built with
15022 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
15023 0.2.9.8, which were built with -ftrapv by default. In other cases
15024 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
15025 on 0.0.8pre1. Found by OSS-Fuzz.
15027 o Minor feature (protocol versioning):
15028 - Add new protocol version for proposal 224. HSIntro now advertises
15029 version "3-4" and HSDir version "1-2". Fixes ticket 20656.
15031 o Minor features (directory authorities):
15032 - Directory authorities now reject descriptors that claim to be
15033 malformed versions of Tor. Helps prevent exploitation of
15035 - Reject version numbers with components that exceed INT32_MAX.
15036 Otherwise 32-bit and 64-bit platforms would behave inconsistently.
15037 Fixes bug 21450; bugfix on 0.0.8pre1.
15038 - Directory authorities now reject relays running versions
15039 0.2.9.1-alpha through 0.2.9.4-alpha, because those relays
15040 suffer from bug 20499 and don't keep their consensus cache
15041 up-to-date. Resolves ticket 20509.
15043 o Minor features (geoip):
15044 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
15047 o Minor features (reliability, crash):
15048 - Try better to detect problems in buffers where they might grow (or
15049 think they have grown) over 2 GB in size. Diagnostic for
15052 o Minor features (testing):
15053 - During 'make test-network-all', if tor logs any warnings, ask
15054 chutney to output them. Requires a recent version of chutney with
15055 the 21572 patch. Implements 21570.
15057 o Minor bugfixes (certificate expiration time):
15058 - Avoid using link certificates that don't become valid till some
15059 time in the future. Fixes bug 21420; bugfix on 0.2.4.11-alpha
15061 o Minor bugfixes (code correctness):
15062 - Repair a couple of (unreachable or harmless) cases of the risky
15063 comparison-by-subtraction pattern that caused bug 21278.
15064 - Remove a redundant check for the UseEntryGuards option from the
15065 options_transition_affects_guards() function. Fixes bug 21492;
15066 bugfix on 0.3.0.1-alpha.
15068 o Minor bugfixes (directory mirrors):
15069 - Allow relays to use directory mirrors without a DirPort: these
15070 relays need to be contacted over their ORPorts using a begindir
15071 connection. Fixes one case of bug 20711; bugfix on 0.2.8.2-alpha.
15072 - Clarify the message logged when a remote relay is unexpectedly
15073 missing an ORPort or DirPort: users were confusing this with a
15074 local port. Fixes another case of bug 20711; bugfix
15077 o Minor bugfixes (guards):
15078 - Don't warn about a missing guard state on timeout-measurement
15079 circuits: they aren't supposed to be using guards. Fixes an
15080 instance of bug 21007; bugfix on 0.3.0.1-alpha.
15081 - Silence a BUG() warning when attempting to use a guard whose
15082 descriptor we don't know, and make this scenario less likely to
15083 happen. Fixes bug 21415; bugfix on 0.3.0.1-alpha.
15085 o Minor bugfixes (hidden service):
15086 - Pass correct buffer length when encoding legacy ESTABLISH_INTRO
15087 cells. Previously, we were using sizeof() on a pointer, instead of
15088 the real destination buffer. Fortunately, that value was only used
15089 to double-check that there was enough room--which was already
15090 enforced elsewhere. Fixes bug 21553; bugfix on 0.3.0.1-alpha.
15092 o Minor bugfixes (testing):
15093 - Fix Raspbian build issues related to missing socket errno in
15094 test_util.c. Fixes bug 21116; bugfix on 0.2.8.2. Patch
15096 - Rename "make fuzz" to "make test-fuzz-corpora", since it doesn't
15097 actually fuzz anything. Fixes bug 21447; bugfix on 0.3.0.3-alpha.
15098 - Use bash in src/test/test-network.sh. This ensures we reliably
15099 call chutney's newer tools/test-network.sh when available. Fixes
15100 bug 21562; bugfix on 0.2.9.1-alpha.
15103 - Small fixes to the fuzzing documentation. Closes ticket 21472.
15106 Changes in version 0.2.9.10 - 2017-03-01
15107 Tor 0.2.9.10 backports a security fix from later Tor release. It also
15108 includes fixes for some major issues affecting directory authorities,
15109 LibreSSL compatibility, and IPv6 correctness.
15111 The Tor 0.2.9.x release series is now marked as a long-term-support
15112 series. We intend to backport security fixes to 0.2.9.x until at
15113 least January of 2020.
15115 o Major bugfixes (directory authority, 0.3.0.3-alpha):
15116 - During voting, when marking a relay as a probable sybil, do not
15117 clear its BadExit flag: sybils can still be bad in other ways
15118 too. (We still clear the other flags.) Fixes bug 21108; bugfix
15121 o Major bugfixes (IPv6 Exits, backport from 0.3.0.3-alpha):
15122 - Stop rejecting all IPv6 traffic on Exits whose exit policy rejects
15123 any IPv6 addresses. Instead, only reject a port over IPv6 if the
15124 exit policy rejects that port on more than an IPv6 /16 of
15125 addresses. This bug was made worse by 17027 in 0.2.8.1-alpha,
15126 which rejected a relay's own IPv6 address by default. Fixes bug
15127 21357; bugfix on commit 004f3f4e53 in 0.2.4.7-alpha.
15129 o Major bugfixes (parsing, also in 0.3.0.4-rc):
15130 - Fix an integer underflow bug when comparing malformed Tor
15131 versions. This bug could crash Tor when built with
15132 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
15133 0.2.9.8, which were built with -ftrapv by default. In other cases
15134 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
15135 on 0.0.8pre1. Found by OSS-Fuzz.
15137 o Minor features (directory authorities, also in 0.3.0.4-rc):
15138 - Directory authorities now reject descriptors that claim to be
15139 malformed versions of Tor. Helps prevent exploitation of
15141 - Reject version numbers with components that exceed INT32_MAX.
15142 Otherwise 32-bit and 64-bit platforms would behave inconsistently.
15143 Fixes bug 21450; bugfix on 0.0.8pre1.
15145 o Minor features (geoip):
15146 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
15149 o Minor features (portability, compilation, backport from 0.3.0.3-alpha):
15150 - Autoconf now checks to determine if OpenSSL structures are opaque,
15151 instead of explicitly checking for OpenSSL version numbers. Part
15153 - Support building with recent LibreSSL code that uses opaque
15154 structures. Closes ticket 21359.
15156 o Minor bugfixes (code correctness, also in 0.3.0.4-rc):
15157 - Repair a couple of (unreachable or harmless) cases of the risky
15158 comparison-by-subtraction pattern that caused bug 21278.
15160 o Minor bugfixes (tor-resolve, backport from 0.3.0.3-alpha):
15161 - The tor-resolve command line tool now rejects hostnames over 255
15162 characters in length. Previously, it would silently truncate them,
15163 which could lead to bugs. Fixes bug 21280; bugfix on 0.0.9pre5.
15164 Patch by "junglefowl".
15167 Changes in version 0.3.0.3-alpha - 2017-02-03
15168 Tor 0.3.0.3-alpha fixes a few significant bugs introduced over the
15169 0.3.0.x development series, including some that could cause
15170 authorities to behave badly. There is also a fix for a longstanding
15171 bug that could prevent IPv6 exits from working. Tor 0.3.0.3-alpha also
15172 includes some smaller features and bugfixes.
15174 The Tor 0.3.0.x release series is now in patch-freeze: no additional
15175 features will be considered for inclusion in 0.3.0.x. We suspect that
15176 some bugs will probably remain, however, and we encourage people to
15179 o Major bugfixes (directory authority):
15180 - During voting, when marking a relay as a probable sybil, do not
15181 clear its BadExit flag: sybils can still be bad in other ways
15182 too. (We still clear the other flags.) Fixes bug 21108; bugfix
15184 - When deciding whether we have just found a router to be reachable,
15185 do not penalize it for not having performed an Ed25519 link
15186 handshake if it does not claim to support an Ed25519 handshake.
15187 Previously, we would treat such relays as non-running. Fixes bug
15188 21107; bugfix on 0.3.0.1-alpha.
15190 o Major bugfixes (entry guards):
15191 - Stop trying to build circuits through entry guards for which we
15192 have no descriptor. Also, stop crashing in the case that we *do*
15193 accidentally try to build a circuit in such a state. Fixes bug
15194 21242; bugfix on 0.3.0.1-alpha.
15196 o Major bugfixes (IPv6 Exits):
15197 - Stop rejecting all IPv6 traffic on Exits whose exit policy rejects
15198 any IPv6 addresses. Instead, only reject a port over IPv6 if the
15199 exit policy rejects that port on more than an IPv6 /16 of
15200 addresses. This bug was made worse by 17027 in 0.2.8.1-alpha,
15201 which rejected a relay's own IPv6 address by default. Fixes bug
15202 21357; bugfix on commit 004f3f4e53 in 0.2.4.7-alpha.
15204 o Minor feature (client):
15205 - Enable IPv6 traffic on the SocksPort by default. To disable this,
15206 a user will have to specify "NoIPv6Traffic". Closes ticket 21269.
15208 o Minor feature (fallback scripts):
15209 - Add a check_existing mode to updateFallbackDirs.py, which checks
15210 if fallbacks in the hard-coded list are working. Closes ticket
15211 20174. Patch by haxxpop.
15213 o Minor features (ciphersuite selection):
15214 - Clients now advertise a list of ciphersuites closer to the ones
15215 preferred by Firefox. Closes part of ticket 15426.
15216 - Allow relays to accept a wider range of ciphersuites, including
15217 chacha20-poly1305 and AES-CCM. Closes the other part of 15426.
15219 o Minor features (controller, configuration):
15220 - Each of the *Port options, such as SocksPort, ORPort, ControlPort,
15221 and so on, now comes with a __*Port variant that will not be saved
15222 to the torrc file by the controller's SAVECONF command. This
15223 change allows TorBrowser to set up a single-use domain socket for
15224 each time it launches Tor. Closes ticket 20956.
15225 - The GETCONF command can now query options that may only be
15226 meaningful in context-sensitive lists. This allows the controller
15227 to query the mixed SocksPort/__SocksPort style options introduced
15228 in feature 20956. Implements ticket 21300.
15230 o Minor features (portability, compilation):
15231 - Autoconf now checks to determine if OpenSSL structures are opaque,
15232 instead of explicitly checking for OpenSSL version numbers. Part
15234 - Support building with recent LibreSSL code that uses opaque
15235 structures. Closes ticket 21359.
15237 o Minor features (relay):
15238 - We now allow separation of exit and relay traffic to different
15239 source IP addresses, using the OutboundBindAddressExit and
15240 OutboundBindAddressOR options respectively. Closes ticket 17975.
15241 Written by Michael Sonntag.
15243 o Minor bugfix (logging):
15244 - Don't recommend the use of Tor2web in non-anonymous mode.
15245 Recommending Tor2web is a bad idea because the client loses all
15246 anonymity. Tor2web should only be used in specific cases by users
15247 who *know* and understand the issues. Fixes bug 21294; bugfix
15250 o Minor bugfixes (client):
15251 - Always recover from failures in extend_info_from_node(), in an
15252 attempt to prevent any recurrence of bug 21242. Fixes bug 21372;
15253 bugfix on 0.2.3.1-alpha.
15255 o Minor bugfixes (client, entry guards):
15256 - Fix a bug warning (with backtrace) when we fail a channel that
15257 circuits to fallback directories on it. Fixes bug 21128; bugfix
15259 - Fix a spurious bug warning (with backtrace) when removing an
15260 expired entry guard. Fixes bug 21129; bugfix on 0.3.0.1-alpha.
15261 - Fix a bug of the new guard algorithm where tor could stall for up
15262 to 10 minutes before retrying a guard after a long period of no
15263 network. Fixes bug 21052; bugfix on 0.3.0.1-alpha.
15264 - Do not try to build circuits until we have descriptors for our
15265 primary entry guards. Related to fix for bug 21242.
15267 o Minor bugfixes (configure, autoconf):
15268 - Rename the configure option --enable-expensive-hardening to
15269 --enable-fragile-hardening. Expensive hardening makes the tor
15270 daemon abort when some kinds of issues are detected. Thus, it
15271 makes tor more at risk of remote crashes but safer against RCE or
15272 heartbleed bug category. We now try to explain this issue in a
15273 message from the configure script. Fixes bug 21290; bugfix
15276 o Minor bugfixes (controller):
15277 - Restore the (deprecated) DROPGUARDS controller command. Fixes bug
15278 20824; bugfix on 0.3.0.1-alpha.
15280 o Minor bugfixes (hidden service):
15281 - Clean up the code for expiring intro points with no associated
15282 circuits. It was causing, rarely, a service with some expiring
15283 introduction points to not open enough additional introduction
15284 points. Fixes part of bug 21302; bugfix on 0.2.7.2-alpha.
15285 - Stop setting the torrc option HiddenServiceStatistics to "0" just
15286 because we're not a bridge or relay. Instead, we preserve whatever
15287 value the user set (or didn't set). Fixes bug 21150; bugfix
15289 - Resolve two possible underflows which could lead to creating and
15290 closing a lot of introduction point circuits in a non-stop loop.
15291 Fixes bug 21302; bugfix on 0.2.7.2-alpha.
15293 o Minor bugfixes (portability):
15294 - Use "OpenBSD" compiler macro instead of "OPENBSD" or "__OpenBSD__".
15295 It is supported by OpenBSD itself, and also by most OpenBSD
15296 variants (such as Bitrig). Fixes bug 20980; bugfix
15298 - When mapping a file of length greater than SIZE_MAX, do not
15299 silently truncate its contents. This issue could occur on 32 bit
15300 systems with large file support and files which are larger than 4
15301 GB. Fixes bug 21134; bugfix on 0.3.0.1-alpha.
15303 o Minor bugfixes (tor-resolve):
15304 - The tor-resolve command line tool now rejects hostnames over 255
15305 characters in length. Previously, it would silently truncate them,
15306 which could lead to bugs. Fixes bug 21280; bugfix on 0.0.9pre5.
15307 Patch by "junglefowl".
15309 o Minor bugfixes (Windows services):
15310 - Be sure to initialize the monotonic time subsystem before using
15311 it, even when running as an NT service. Fixes bug 21356; bugfix
15315 Changes in version 0.3.0.2-alpha - 2017-01-23
15316 Tor 0.3.0.2-alpha fixes a denial-of-service bug where an attacker could
15317 cause relays and clients to crash, even if they were not built with
15318 the --enable-expensive-hardening option. This bug affects all 0.2.9.x
15319 versions, and also affects 0.3.0.1-alpha: all relays running an affected
15320 version should upgrade.
15322 Tor 0.3.0.2-alpha also improves how exit relays and clients handle DNS
15323 time-to-live values, makes directory authorities enforce the 1-to-1
15324 mapping of relay RSA identity keys to ED25519 identity keys, fixes a
15325 client-side onion service reachability bug, does better at selecting
15326 the set of fallback directories, and more.
15328 o Major bugfixes (security, also in 0.2.9.9):
15329 - Downgrade the "-ftrapv" option from "always on" to "only on when
15330 --enable-expensive-hardening is provided." This hardening option, like
15331 others, can turn survivable bugs into crashes--and having it on by
15332 default made a (relatively harmless) integer overflow bug into a
15333 denial-of-service bug. Fixes bug 21278 (TROVE-2017-001); bugfix on
15336 o Major features (security):
15337 - Change the algorithm used to decide DNS TTLs on client and server
15338 side, to better resist DNS-based correlation attacks like the
15339 DefecTor attack of Greschbach, Pulls, Roberts, Winter, and
15340 Feamster. Now relays only return one of two possible DNS TTL
15341 values, and clients are willing to believe DNS TTL values up to 3
15342 hours long. Closes ticket 19769.
15344 o Major features (directory authority, security):
15345 - The default for AuthDirPinKeys is now 1: directory authorities
15346 will reject relays where the RSA identity key matches a previously
15347 seen value, but the Ed25519 key has changed. Closes ticket 18319.
15349 o Major bugfixes (client, guard, crash):
15350 - In circuit_get_global_origin_list(), return the actual list of
15351 origin circuits. The previous version of this code returned the
15352 list of all the circuits, and could have caused strange bugs,
15353 including possible crashes. Fixes bug 21118; bugfix
15356 o Major bugfixes (client, onion service, also in 0.2.9.9):
15357 - Fix a client-side onion service reachability bug, where multiple
15358 socks requests to an onion service (or a single slow request)
15359 could cause us to mistakenly mark some of the service's
15360 introduction points as failed, and we cache that failure so
15361 eventually we run out and can't reach the service. Also resolves a
15362 mysterious "Remote server sent bogus reason code 65021" log
15363 warning. The bug was introduced in ticket 17218, where we tried to
15364 remember the circuit end reason as a uint16_t, which mangled
15365 negative values. Partially fixes bug 21056 and fixes bug 20307;
15366 bugfix on 0.2.8.1-alpha.
15368 o Major bugfixes (DNS):
15369 - Fix a bug that prevented exit nodes from caching DNS records for
15370 more than 60 seconds. Fixes bug 19025; bugfix on 0.2.4.7-alpha.
15372 o Minor features (controller):
15373 - Add "GETINFO sr/current" and "GETINFO sr/previous" keys, to expose
15374 shared-random values to the controller. Closes ticket 19925.
15376 o Minor features (entry guards):
15377 - Add UseEntryGuards to TEST_OPTIONS_DEFAULT_VALUES in order to not
15378 break regression tests.
15379 - Require UseEntryGuards when UseBridges is set, in order to make
15380 sure bridges aren't bypassed. Resolves ticket 20502.
15382 o Minor features (fallback directories):
15383 - Select 200 fallback directories for each release. Closes
15385 - Allow 3 fallback relays per operator, which is safe now that we
15386 are choosing 200 fallback relays. Closes ticket 20912.
15387 - Exclude relays affected by bug 20499 from the fallback list.
15388 Exclude relays from the fallback list if they are running versions
15389 known to be affected by bug 20499, or if in our tests they deliver
15390 a stale consensus (i.e. one that expired more than 24 hours ago).
15391 Closes ticket 20539.
15392 - Reduce the minimum fallback bandwidth to 1 MByte/s. Part of
15394 - Require fallback directories to have the same address and port for
15395 7 days (now that we have enough relays with this stability).
15396 Relays whose OnionOO stability timer is reset on restart by bug
15397 18050 should upgrade to Tor 0.2.8.7 or later, which has a fix for
15398 this issue. Closes ticket 20880; maintains short-term fix
15400 - Require fallbacks to have flags for 90% of the time (weighted
15401 decaying average), rather than 95%. This allows at least 73% of
15402 clients to bootstrap in the first 5 seconds without contacting an
15403 authority. Part of ticket 18828.
15404 - Annotate updateFallbackDirs.py with the bandwidth and consensus
15405 weight for each candidate fallback. Closes ticket 20878.
15406 - Make it easier to change the output sort order of fallbacks.
15407 Closes ticket 20822.
15408 - Display the relay fingerprint when downloading consensuses from
15409 fallbacks. Closes ticket 20908.
15411 o Minor features (geoip, also in 0.2.9.9):
15412 - Update geoip and geoip6 to the January 4 2017 Maxmind GeoLite2
15415 o Minor features (next-gen onion service directories):
15416 - Remove the "EnableOnionServicesV3" consensus parameter that we
15417 introduced in 0.3.0.1-alpha: relays are now always willing to act
15418 as v3 onion service directories. Resolves ticket 19899.
15420 o Minor features (linting):
15421 - Enhance the changes file linter to warn on Tor versions that are
15422 prefixed with "tor-". Closes ticket 21096.
15424 o Minor features (logging):
15425 - In several places, describe unset ed25519 keys as "<unset>",
15426 rather than the scary "AAAAAAAA...AAA". Closes ticket 21037.
15428 o Minor bugfix (control protocol):
15429 - The reply to a "GETINFO config/names" request via the control
15430 protocol now spells the type "Dependent" correctly. This is a
15431 breaking change in the control protocol. (The field seems to be
15432 ignored by the most common known controllers.) Fixes bug 18146;
15433 bugfix on 0.1.1.4-alpha.
15435 o Minor bugfixes (bug resilience):
15436 - Fix an unreachable size_t overflow in base64_decode(). Fixes bug
15437 19222; bugfix on 0.2.0.9-alpha. Found by Guido Vranken; fixed by
15438 Hans Jerry Illikainen.
15440 o Minor bugfixes (build):
15441 - Replace obsolete Autoconf macros with their modern equivalent and
15442 prevent similar issues in the future. Fixes bug 20990; bugfix
15445 o Minor bugfixes (client, guards):
15446 - Fix bug where Tor would think that there are circuits waiting for
15447 better guards even though those circuits have been freed. Fixes
15448 bug 21142; bugfix on 0.3.0.1-alpha.
15450 o Minor bugfixes (config):
15451 - Don't assert on startup when trying to get the options list and
15452 LearnCircuitBuildTimeout is set to 0: we are currently parsing the
15453 options so of course they aren't ready yet. Fixes bug 21062;
15454 bugfix on 0.2.9.3-alpha.
15456 o Minor bugfixes (controller):
15457 - Make the GETINFO interface for inquiring about entry guards
15458 support the new guards backend. Fixes bug 20823; bugfix
15461 o Minor bugfixes (dead code):
15462 - Remove a redundant check for PidFile changes at runtime in
15463 options_transition_allowed(): this check is already performed
15464 regardless of whether the sandbox is active. Fixes bug 21123;
15465 bugfix on 0.2.5.4-alpha.
15467 o Minor bugfixes (documentation):
15468 - Update the tor manual page to document every option that can not
15469 be changed while tor is running. Fixes bug 21122.
15471 o Minor bugfixes (fallback directories):
15472 - Stop failing when a relay has no uptime data in
15473 updateFallbackDirs.py. Fixes bug 20945; bugfix on 0.2.8.1-alpha.
15474 - Avoid checking fallback candidates' DirPorts if they are down in
15475 OnionOO. When a relay operator has multiple relays, this
15476 prioritizes relays that are up over relays that are down. Fixes
15477 bug 20926; bugfix on 0.2.8.3-alpha.
15478 - Stop failing when OUTPUT_COMMENTS is True in updateFallbackDirs.py.
15479 Fixes bug 20877; bugfix on 0.2.8.3-alpha.
15481 o Minor bugfixes (guards, bootstrapping):
15482 - When connecting to a directory guard during bootstrap, do not mark
15483 the guard as successful until we receive a good-looking directory
15484 response from it. Fixes bug 20974; bugfix on 0.3.0.1-alpha.
15486 o Minor bugfixes (onion services):
15487 - Fix the config reload pruning of old vs new services so it
15488 actually works when both ephemeral and non-ephemeral services are
15489 configured. Fixes bug 21054; bugfix on 0.3.0.1-alpha.
15490 - Allow the number of introduction points to be as low as 0, rather
15491 than as low as 3. Fixes bug 21033; bugfix on 0.2.7.2-alpha.
15493 o Minor bugfixes (IPv6):
15494 - Make IPv6-using clients try harder to find an IPv6 directory
15495 server. Fixes bug 20999; bugfix on 0.2.8.2-alpha.
15496 - When IPv6 addresses have not been downloaded yet (microdesc
15497 consensus documents don't list relay IPv6 addresses), use hard-
15498 coded addresses for authorities, fallbacks, and configured
15499 bridges. Now IPv6-only clients can use microdescriptors. Fixes bug
15500 20996; bugfix on b167e82 from 19608 in 0.2.8.5-alpha.
15502 o Minor bugfixes (memory leaks):
15503 - Fix a memory leak when configuring hidden services. Fixes bug
15504 20987; bugfix on 0.3.0.1-alpha.
15506 o Minor bugfixes (portability, also in 0.2.9.9):
15507 - Avoid crashing when Tor is built using headers that contain
15508 CLOCK_MONOTONIC_COARSE, but then tries to run on an older kernel
15509 without CLOCK_MONOTONIC_COARSE. Fixes bug 21035; bugfix
15511 - Fix Libevent detection on platforms without Libevent 1 headers
15512 installed. Fixes bug 21051; bugfix on 0.2.9.1-alpha.
15514 o Minor bugfixes (relay):
15515 - Honor DataDirectoryGroupReadable when tor is a relay. Previously,
15516 initializing the keys would reset the DataDirectory to 0700
15517 instead of 0750 even if DataDirectoryGroupReadable was set to 1.
15518 Fixes bug 19953; bugfix on 0.0.2pre16. Patch by "redfish".
15520 o Minor bugfixes (testing):
15521 - Remove undefined behavior from the backtrace generator by removing
15522 its signal handler. Fixes bug 21026; bugfix on 0.2.5.2-alpha.
15524 o Minor bugfixes (unit tests):
15525 - Allow the unit tests to pass even when DNS lookups of bogus
15526 addresses do not fail as expected. Fixes bug 20862 and 20863;
15527 bugfix on unit tests introduced in 0.2.8.1-alpha
15528 through 0.2.9.4-alpha.
15530 o Code simplification and refactoring:
15531 - Refactor code to manipulate global_origin_circuit_list into
15532 separate functions. Closes ticket 20921.
15534 o Documentation (formatting):
15535 - Clean up formatting of tor.1 man page and HTML doc, where <pre>
15536 blocks were incorrectly appearing. Closes ticket 20885.
15538 o Documentation (man page):
15539 - Clarify many options in tor.1 and add some min/max values for
15540 HiddenService options. Closes ticket 21058.
15543 Changes in version 0.2.9.9 - 2017-01-23
15544 Tor 0.2.9.9 fixes a denial-of-service bug where an attacker could
15545 cause relays and clients to crash, even if they were not built with
15546 the --enable-expensive-hardening option. This bug affects all 0.2.9.x
15547 versions, and also affects 0.3.0.1-alpha: all relays running an affected
15548 version should upgrade.
15550 This release also resolves a client-side onion service reachability
15551 bug, and resolves a pair of small portability issues.
15553 o Major bugfixes (security):
15554 - Downgrade the "-ftrapv" option from "always on" to "only on when
15555 --enable-expensive-hardening is provided." This hardening option,
15556 like others, can turn survivable bugs into crashes -- and having
15557 it on by default made a (relatively harmless) integer overflow bug
15558 into a denial-of-service bug. Fixes bug 21278 (TROVE-2017-001);
15559 bugfix on 0.2.9.1-alpha.
15561 o Major bugfixes (client, onion service):
15562 - Fix a client-side onion service reachability bug, where multiple
15563 socks requests to an onion service (or a single slow request)
15564 could cause us to mistakenly mark some of the service's
15565 introduction points as failed, and we cache that failure so
15566 eventually we run out and can't reach the service. Also resolves a
15567 mysterious "Remote server sent bogus reason code 65021" log
15568 warning. The bug was introduced in ticket 17218, where we tried to
15569 remember the circuit end reason as a uint16_t, which mangled
15570 negative values. Partially fixes bug 21056 and fixes bug 20307;
15571 bugfix on 0.2.8.1-alpha.
15573 o Minor features (geoip):
15574 - Update geoip and geoip6 to the January 4 2017 Maxmind GeoLite2
15577 o Minor bugfixes (portability):
15578 - Avoid crashing when Tor is built using headers that contain
15579 CLOCK_MONOTONIC_COARSE, but then tries to run on an older kernel
15580 without CLOCK_MONOTONIC_COARSE. Fixes bug 21035; bugfix
15582 - Fix Libevent detection on platforms without Libevent 1 headers
15583 installed. Fixes bug 21051; bugfix on 0.2.9.1-alpha.
15586 Changes in version 0.3.0.1-alpha - 2016-12-19
15587 Tor 0.3.0.1-alpha is the first alpha release in the 0.3.0 development
15588 series. It strengthens Tor's link and circuit handshakes by
15589 identifying relays by their Ed25519 keys, improves the algorithm that
15590 clients use to choose and maintain their list of guards, and includes
15591 additional backend support for the next-generation hidden service
15592 design. It also contains numerous other small features and
15593 improvements to security, correctness, and performance.
15595 Below are the changes since 0.2.9.8.
15597 o Major features (guard selection algorithm):
15598 - Tor's guard selection algorithm has been redesigned from the
15599 ground up, to better support unreliable networks and restrictive
15600 sets of entry nodes, and to better resist guard-capture attacks by
15601 hostile local networks. Implements proposal 271; closes
15604 o Major features (next-generation hidden services):
15605 - Relays can now handle v3 ESTABLISH_INTRO cells as specified by
15606 prop224 aka "Next Generation Hidden Services". Service and clients
15607 don't use this functionality yet. Closes ticket 19043. Based on
15608 initial code by Alec Heifetz.
15609 - Relays now support the HSDir version 3 protocol, so that they can
15610 can store and serve v3 descriptors. This is part of the next-
15611 generation onion service work detailed in proposal 224. Closes
15614 o Major features (protocol, ed25519 identity keys):
15615 - Relays now use Ed25519 to prove their Ed25519 identities and to
15616 one another, and to clients. This algorithm is faster and more
15617 secure than the RSA-based handshake we've been doing until now.
15618 Implements the second big part of proposal 220; Closes
15620 - Clients now support including Ed25519 identity keys in the EXTEND2
15621 cells they generate. By default, this is controlled by a consensus
15622 parameter, currently disabled. You can turn this feature on for
15623 testing by setting ExtendByEd25519ID in your configuration. This
15624 might make your traffic appear different than the traffic
15625 generated by other users, however. Implements part of ticket
15626 15056; part of proposal 220.
15627 - Relays now understand requests to extend to other relays by their
15628 Ed25519 identity keys. When an Ed25519 identity key is included in
15629 an EXTEND2 cell, the relay will only extend the circuit if the
15630 other relay can prove ownership of that identity. Implements part
15631 of ticket 15056; part of proposal 220.
15633 o Major bugfixes (scheduler):
15634 - Actually compare circuit policies in ewma_cmp_cmux(). This bug
15635 caused the channel scheduler to behave more or less randomly,
15636 rather than preferring channels with higher-priority circuits.
15637 Fixes bug 20459; bugfix on 0.2.6.2-alpha.
15639 o Minor features (controller):
15640 - When HSFETCH arguments cannot be parsed, say "Invalid argument"
15641 rather than "unrecognized." Closes ticket 20389; patch from
15644 o Minor features (diagnostic, directory client):
15645 - Warn when we find an unexpected inconsistency in directory
15646 download status objects. Prevents some negative consequences of
15649 o Minor features (directory authority):
15650 - Add a new authority-only AuthDirTestEd25519LinkKeys option (on by
15651 default) to control whether authorities should try to probe relays
15652 by their Ed25519 link keys. This option will go away in a few
15653 releases--unless we encounter major trouble in our ed25519 link
15654 protocol rollout, in which case it will serve as a safety option.
15656 o Minor features (directory cache):
15657 - Relays and bridges will now refuse to serve the consensus they
15658 have if they know it is too old for a client to use. Closes
15661 o Minor features (ed25519 link handshake):
15662 - Advertise support for the ed25519 link handshake using the
15663 subprotocol-versions mechanism, so that clients can tell which
15664 relays can identity themselves by Ed25519 ID. Closes ticket 20552.
15666 o Minor features (fingerprinting resistance, authentication):
15667 - Extend the length of RSA keys used for TLS link authentication to
15668 2048 bits. (These weren't used for forward secrecy; for forward
15669 secrecy, we used P256.) Closes ticket 13752.
15671 o Minor features (infrastructure):
15672 - Implement smartlist_add_strdup() function. Replaces the use of
15673 smartlist_add(sl, tor_strdup(str)). Closes ticket 20048.
15675 o Minor bugfixes (client):
15676 - When clients that use bridges start up with a cached consensus on
15677 disk, they were ignoring it and downloading a new one. Now they
15678 use the cached one. Fixes bug 20269; bugfix on 0.2.3.12-alpha.
15680 o Minor bugfixes (configuration):
15681 - Accept non-space whitespace characters after the severity level in
15682 the `Log` option. Fixes bug 19965; bugfix on 0.2.1.1-alpha.
15683 - Support "TByte" and "TBytes" units in options given in bytes.
15684 "TB", "terabyte(s)", "TBit(s)" and "terabit(s)" were already
15685 supported. Fixes bug 20622; bugfix on 0.2.0.14-alpha.
15687 o Minor bugfixes (consensus weight):
15688 - Add new consensus method that initializes bw weights to 1 instead
15689 of 0. This prevents a zero weight from making it all the way to
15690 the end (happens in small testing networks) and causing an error.
15691 Fixes bug 14881; bugfix on 0.2.2.17-alpha.
15693 o Minor bugfixes (descriptors):
15694 - Correctly recognise downloaded full descriptors as valid, even
15695 when using microdescriptors as circuits. This affects clients with
15696 FetchUselessDescriptors set, and may affect directory authorities.
15697 Fixes bug 20839; bugfix on 0.2.3.2-alpha.
15699 o Minor bugfixes (directory system):
15700 - Download all consensus flavors, descriptors, and authority
15701 certificates when FetchUselessDescriptors is set, regardless of
15702 whether tor is a directory cache or not. Fixes bug 20667; bugfix
15703 on all recent tor versions.
15704 - Bridges and relays now use microdescriptors (like clients do)
15705 rather than old-style router descriptors. Now bridges will blend
15706 in with clients in terms of the circuits they build. Fixes bug
15707 6769; bugfix on 0.2.3.2-alpha.
15709 o Minor bugfixes (ed25519 certificates):
15710 - Correctly interpret ed25519 certificates that would expire some
15711 time after 19 Jan 2038. Fixes bug 20027; bugfix on 0.2.7.2-alpha.
15713 o Minor bugfixes (hidden services):
15714 - Stop ignoring misconfigured hidden services. Instead, refuse to
15715 start tor until the misconfigurations have been corrected. Fixes
15716 bug 20559; bugfix on multiple commits in 0.2.7.1-alpha
15719 o Minor bugfixes (memory leak at exit):
15720 - Fix a small harmless memory leak at exit of the previously unused
15721 RSA->Ed identity cross-certificate. Fixes bug 17779; bugfix
15724 o Minor bugfixes (util):
15725 - When finishing writing a file to disk, if we were about to replace
15726 the file with the temporary file created before and we fail to
15727 replace it, remove the temporary file so it doesn't stay on disk.
15728 Fixes bug 20646; bugfix on 0.2.0.7-alpha. Patch by fk.
15730 o Minor bugfixes (Windows):
15731 - Check for getpagesize before using it to mmap files. This fixes
15732 compilation in some MinGW environments. Fixes bug 20530; bugfix on
15733 0.1.2.1-alpha. Reported by "ice".
15735 o Code simplification and refactoring:
15736 - Abolish all global guard context in entrynodes.c; replace with new
15737 guard_selection_t structure as preparation for proposal 271.
15738 Closes ticket 19858.
15739 - Introduce rend_service_is_ephemeral() that tells if given onion
15740 service is ephemeral. Replace unclear NULL-checkings for service
15741 directory with this function. Closes ticket 20526.
15742 - Extract magic numbers in circuituse.c into defined variables.
15743 - Refactor circuit_is_available_for_use to remove unnecessary check.
15744 - Refactor circuit_predict_and_launch_new for readability and
15745 testability. Closes ticket 18873.
15746 - Refactor large if statement in purpose_needs_anonymity to use
15747 switch statement instead. Closes part of ticket 20077.
15748 - Refactor the hashing API to return negative values for errors, as
15749 is done as throughout the codebase. Closes ticket 20717.
15750 - Remove data structures that were used to index or_connection
15751 objects by their RSA identity digests. These structures are fully
15752 redundant with the similar structures used in the
15753 channel abstraction.
15754 - Remove duplicate code in the channel_write_*cell() functions.
15755 Closes ticket 13827; patch from Pingl.
15756 - Remove redundant behavior of is_sensitive_dir_purpose, refactor to
15757 use only purpose_needs_anonymity. Closes part of ticket 20077.
15758 - The code to generate and parse EXTEND and EXTEND2 cells has been
15759 replaced with code automatically generated by the
15763 - Include the "TBits" unit in Tor's man page. Fixes part of bug
15764 20622; bugfix on 0.2.5.1-alpha.
15765 - Change '1' to 'weight_scale' in consensus bw weights calculation
15766 comments, as that is reality. Closes ticket 20273. Patch
15768 - Correct the value for AuthDirGuardBWGuarantee in the manpage, from
15769 250 KBytes to 2 MBytes. Fixes bug 20435; bugfix
15771 - Stop the man page from incorrectly stating that HiddenServiceDir
15772 must already exist. Fixes 20486.
15773 - Clarify that when ClientRejectInternalAddresses is enabled (which
15774 is the default), multicast DNS hostnames for machines on the local
15775 network (of the form *.local) are also rejected. Closes
15778 o Removed features:
15779 - The AuthDirMaxServersPerAuthAddr option no longer exists: The same
15780 limit for relays running on a single IP applies to authority IP
15781 addresses as well as to non-authority IP addresses. Closes
15783 - The UseDirectoryGuards torrc option no longer exists: all users
15784 that use entry guards will also use directory guards. Related to
15785 proposal 271; implements part of ticket 20831.
15788 - New unit tests for tor_htonll(). Closes ticket 19563. Patch
15789 from "overcaffeinated".
15790 - Perform the coding style checks when running the tests and fail
15791 when coding style violations are found. Closes ticket 5500.
15792 - Add tests for networkstatus_compute_bw_weights_v10.
15793 - Add unit tests circuit_predict_and_launch_new.
15794 - Extract dummy_origin_circuit_new so it can be used by other
15798 Changes in version 0.2.8.12 - 2016-12-19
15799 Tor 0.2.8.12 backports a fix for a medium-severity issue (bug 21018
15800 below) where Tor clients could crash when attempting to visit a
15801 hostile hidden service. Clients are recommended to upgrade as packages
15802 become available for their systems.
15804 It also includes an updated list of fallback directories, backported
15807 Now that the Tor 0.2.9 series is stable, only major bugfixes will be
15808 backported to 0.2.8 in the future.
15810 o Major bugfixes (parsing, security, backported from 0.2.9.8):
15811 - Fix a bug in parsing that could cause clients to read a single
15812 byte past the end of an allocated region. This bug could be used
15813 to cause hardened clients (built with --enable-expensive-hardening)
15814 to crash if they tried to visit a hostile hidden service. Non-
15815 hardened clients are only affected depending on the details of
15816 their platform's memory allocator. Fixes bug 21018; bugfix on
15817 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
15818 2016-12-002 and as CVE-2016-1254.
15820 o Minor features (fallback directory list, backported from 0.2.9.8):
15821 - Replace the 81 remaining fallbacks of the 100 originally
15822 introduced in Tor 0.2.8.3-alpha in March 2016, with a list of 177
15823 fallbacks (123 new, 54 existing, 27 removed) generated in December
15824 2016. Resolves ticket 20170.
15826 o Minor features (geoip, backported from 0.2.9.7-rc):
15827 - Update geoip and geoip6 to the December 7 2016 Maxmind GeoLite2
15831 Changes in version 0.2.9.8 - 2016-12-19
15832 Tor 0.2.9.8 is the first stable release of the Tor 0.2.9 series.
15834 The Tor 0.2.9 series makes mandatory a number of security features
15835 that were formerly optional. It includes support for a new shared-
15836 randomness protocol that will form the basis for next generation
15837 hidden services, includes a single-hop hidden service mode for
15838 optimizing .onion services that don't actually want to be hidden,
15839 tries harder not to overload the directory authorities with excessive
15840 downloads, and supports a better protocol versioning scheme for
15841 improved compatibility with other implementations of the Tor protocol.
15843 And of course, there are numerous other bugfixes and improvements.
15845 This release also includes a fix for a medium-severity issue (bug
15846 21018 below) where Tor clients could crash when attempting to visit a
15847 hostile hidden service. Clients are recommended to upgrade as packages
15848 become available for their systems.
15850 Below are the changes since 0.2.9.7-rc. For a list of all changes
15851 since 0.2.8, see the ReleaseNotes file.
15853 o Major bugfixes (parsing, security):
15854 - Fix a bug in parsing that could cause clients to read a single
15855 byte past the end of an allocated region. This bug could be used
15856 to cause hardened clients (built with --enable-expensive-hardening)
15857 to crash if they tried to visit a hostile hidden service. Non-
15858 hardened clients are only affected depending on the details of
15859 their platform's memory allocator. Fixes bug 21018; bugfix on
15860 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
15861 2016-12-002 and as CVE-2016-1254.
15863 o Minor features (fallback directory list):
15864 - Replace the 81 remaining fallbacks of the 100 originally
15865 introduced in Tor 0.2.8.3-alpha in March 2016, with a list of 177
15866 fallbacks (123 new, 54 existing, 27 removed) generated in December
15867 2016. Resolves ticket 20170.
15870 Changes in version 0.2.9.7-rc - 2016-12-12
15871 Tor 0.2.9.7-rc fixes a few small bugs remaining in Tor 0.2.9.6-rc,
15872 including a few that had prevented tests from passing on
15875 o Minor features (geoip):
15876 - Update geoip and geoip6 to the December 7 2016 Maxmind GeoLite2
15879 o Minor bugfix (build):
15880 - The current Git revision when building from a local repository is
15881 now detected correctly when using git worktrees. Fixes bug 20492;
15882 bugfix on 0.2.3.9-alpha.
15884 o Minor bugfixes (directory authority):
15885 - When computing old Tor protocol line version in protover, we were
15886 looking at 0.2.7.5 twice instead of a specific case for
15887 0.2.9.1-alpha. Fixes bug 20810; bugfix on 0.2.9.4-alpha.
15889 o Minor bugfixes (download scheduling):
15890 - Resolve a "bug" warning when considering a download schedule whose
15891 delay had approached INT_MAX. Fixes 20875; bugfix on 0.2.9.5-alpha.
15893 o Minor bugfixes (logging):
15894 - Downgrade a harmless log message about the
15895 pending_entry_connections list from "warn" to "info". Mitigates
15898 o Minor bugfixes (memory leak):
15899 - Fix a small memory leak when receiving AF_UNIX connections on a
15900 SocksPort. Fixes bug 20716; bugfix on 0.2.6.3-alpha.
15901 - When moving a signed descriptor object from a source to an
15902 existing destination, free the allocated memory inside that
15903 destination object. Fixes bug 20715; bugfix on 0.2.8.3-alpha.
15905 o Minor bugfixes (memory leak, use-after-free, linux seccomp2 sandbox):
15906 - Fix a memory leak and use-after-free error when removing entries
15907 from the sandbox's getaddrinfo() cache. Fixes bug 20710; bugfix on
15908 0.2.5.5-alpha. Patch from "cypherpunks".
15910 o Minor bugfixes (portability):
15911 - Use the correct spelling of MAC_OS_X_VERSION_10_12 on configure.ac
15912 Fixes bug 20935; bugfix on 0.2.9.6-rc.
15914 o Minor bugfixes (unit tests):
15915 - Stop expecting NetBSD unit tests to report success for ipfw. Part
15916 of a fix for bug 19960; bugfix on 0.2.9.5-alpha.
15917 - Fix tolerances in unit tests for monotonic time comparisons
15918 between nanoseconds and microseconds. Previously, we accepted a 10
15919 us difference only, which is not realistic on every platform's
15920 clock_gettime(). Fixes bug 19974; bugfix on 0.2.9.1-alpha.
15921 - Remove a double-free in the single onion service unit test. Stop
15922 ignoring a return value. Make future changes less error-prone.
15923 Fixes bug 20864; bugfix on 0.2.9.6-rc.
15926 Changes in version 0.2.8.11 - 2016-12-08
15927 Tor 0.2.8.11 backports fixes for additional portability issues that
15928 could prevent Tor from building correctly on OSX Sierra, or with
15929 OpenSSL 1.1. Affected users should upgrade; others can safely stay
15932 o Minor bugfixes (portability):
15933 - Avoid compilation errors when building on OSX Sierra. Sierra began
15934 to support the getentropy() and clock_gettime() APIs, but created
15935 a few problems in doing so. Tor 0.2.9 has a more thorough set of
15936 workarounds; in 0.2.8, we are just using the /dev/urandom and mach
15937 monotonic time interfaces. Fixes bug 20865. Bugfix
15940 o Minor bugfixes (portability, backport from 0.2.9.5-alpha):
15941 - Fix compilation with OpenSSL 1.1 and less commonly-used CPU
15942 architectures. Closes ticket 20588.
15945 Changes in version 0.2.8.10 - 2016-12-02
15946 Tor 0.2.8.10 backports a fix for a bug that would sometimes make clients
15947 unusable after they left standby mode. It also backports fixes for
15948 a few portability issues and a small but problematic memory leak.
15950 o Major bugfixes (client reliability, backport from 0.2.9.5-alpha):
15951 - When Tor leaves standby because of a new application request, open
15952 circuits as needed to serve that request. Previously, we would
15953 potentially wait a very long time. Fixes part of bug 19969; bugfix
15956 o Major bugfixes (client performance, backport from 0.2.9.5-alpha):
15957 - Clients now respond to new application stream requests immediately
15958 when they arrive, rather than waiting up to one second before
15959 starting to handle them. Fixes part of bug 19969; bugfix
15962 o Minor bugfixes (portability, backport from 0.2.9.6-rc):
15963 - Work around a bug in the OSX 10.12 SDK that would prevent us from
15964 successfully targeting earlier versions of OSX. Resolves
15967 o Minor bugfixes (portability, backport from 0.2.9.5-alpha):
15968 - Fix implicit conversion warnings under OpenSSL 1.1. Fixes bug
15969 20551; bugfix on 0.2.1.1-alpha.
15971 o Minor bugfixes (relay, backport from 0.2.9.5-alpha):
15972 - Work around a memory leak in OpenSSL 1.1 when encoding public
15973 keys. Fixes bug 20553; bugfix on 0.0.2pre8.
15975 o Minor features (geoip):
15976 - Update geoip and geoip6 to the November 3 2016 Maxmind GeoLite2
15979 Changes in version 0.2.9.6-rc - 2016-12-02
15980 Tor 0.2.9.6-rc fixes a few remaining bugs found in the previous alpha
15981 version. We hope that it will be ready to become stable soon, and we
15982 encourage everyone to test this release. If no showstopper bugs are
15983 found here, the next 0.2.9 release will be stable.
15985 o Major bugfixes (relay, resolver, logging):
15986 - For relays that don't know their own address, avoid attempting a
15987 local hostname resolve for each descriptor we download. This
15988 will cut down on the number of "Success: chose address 'x.x.x.x'"
15989 log lines, and also avoid confusing clock jumps if the resolver
15990 is slow. Fixes bugs 20423 and 20610; bugfix on 0.2.8.1-alpha.
15992 o Minor bugfixes (client, fascistfirewall):
15993 - Avoid spurious warnings when ReachableAddresses or FascistFirewall
15994 is set. Fixes bug 20306; bugfix on 0.2.8.2-alpha.
15996 o Minor bugfixes (hidden services):
15997 - Stop ignoring the anonymity status of saved keys for hidden
15998 services and single onion services when first starting tor.
15999 Instead, refuse to start tor if any hidden service key has been
16000 used in a different hidden service anonymity mode. Fixes bug
16001 20638; bugfix on 17178 in 0.2.9.3-alpha; reported by ahf.
16003 o Minor bugfixes (portability):
16004 - Work around a bug in the OSX 10.12 SDK that would prevent us from
16005 successfully targeting earlier versions of OSX. Resolves
16007 - Run correctly when built on Windows build environments that
16008 require _vcsprintf(). Fixes bug 20560; bugfix on 0.2.2.11-alpha.
16010 o Minor bugfixes (single onion services, Tor2web):
16011 - Stop complaining about long-term one-hop circuits deliberately
16012 created by single onion services and Tor2web. These log messages
16013 are intended to diagnose issue 8387, which relates to circuits
16014 hanging around forever for no reason. Fixes bug 20613; bugfix on
16015 0.2.9.1-alpha. Reported by "pastly".
16017 o Minor bugfixes (unit tests):
16018 - Stop spurious failures in the local interface address discovery
16019 unit tests. Fixes bug 20634; bugfix on 0.2.8.1-alpha; patch by
16023 - Correct the minimum bandwidth value in torrc.sample, and queue a
16024 corresponding change for torrc.minimal. Closes ticket 20085.
16027 Changes in version 0.2.9.5-alpha - 2016-11-08
16028 Tor 0.2.9.5-alpha fixes numerous bugs discovered in the previous alpha
16029 version. We believe one or two probably remain, and we encourage
16030 everyone to test this release.
16032 o Major bugfixes (client performance):
16033 - Clients now respond to new application stream requests immediately
16034 when they arrive, rather than waiting up to one second before
16035 starting to handle them. Fixes part of bug 19969; bugfix
16038 o Major bugfixes (client reliability):
16039 - When Tor leaves standby because of a new application request, open
16040 circuits as needed to serve that request. Previously, we would
16041 potentially wait a very long time. Fixes part of bug 19969; bugfix
16044 o Major bugfixes (download scheduling):
16045 - When using an exponential backoff schedule, do not give up on
16046 downloading just because we have failed a bunch of times. Since
16047 each delay is longer than the last, retrying indefinitely won't
16048 hurt. Fixes bug 20536; bugfix on 0.2.9.1-alpha.
16049 - If a consensus expires while we are waiting for certificates to
16050 download, stop waiting for certificates.
16051 - If we stop waiting for certificates less than a minute after we
16052 started downloading them, do not consider the certificate download
16053 failure a separate failure. Fixes bug 20533; bugfix
16055 - Remove the maximum delay on exponential-backoff scheduling. Since
16056 we now allow an infinite number of failures (see ticket 20536), we
16057 must now allow the time to grow longer on each failure. Fixes part
16058 of bug 20534; bugfix on 0.2.9.1-alpha.
16059 - Make our initial download delays closer to those from 0.2.8. Fixes
16060 another part of bug 20534; bugfix on 0.2.9.1-alpha.
16061 - When determining when to download a directory object, handle times
16062 after 2038 if the operating system supports them. (Someday this
16063 will be important!) Fixes bug 20587; bugfix on 0.2.8.1-alpha.
16064 - When using exponential backoff in test networks, use a lower
16065 exponent, so the delays do not vary as much. This helps test
16066 networks bootstrap consistently. Fixes bug 20597; bugfix on 20499.
16068 o Minor features (geoip):
16069 - Update geoip and geoip6 to the November 3 2016 Maxmind GeoLite2
16072 o Minor bugfixes (client directory scheduling):
16073 - Treat "relay too busy to answer request" as a failed request and a
16074 reason to back off on our retry frequency. This is safe now that
16075 exponential backoffs retry indefinitely, and avoids a bug where we
16076 would reset our download schedule erroneously. Fixes bug 20593;
16077 bugfix on 0.2.9.1-alpha.
16079 o Minor bugfixes (client, logging):
16080 - Remove a BUG warning in circuit_pick_extend_handshake(). Instead,
16081 assume all nodes support EXTEND2. Use ntor whenever a key is
16082 available. Fixes bug 20472; bugfix on 0.2.9.3-alpha.
16083 - On DNSPort, stop logging a BUG warning on a failed hostname
16084 lookup. Fixes bug 19869; bugfix on 0.2.9.1-alpha.
16086 o Minor bugfixes (hidden services):
16087 - When configuring hidden services, check every hidden service
16088 directory's permissions. Previously, we only checked the last
16089 hidden service. Fixes bug 20529; bugfix the work to fix 13942
16092 o Minor bugfixes (portability):
16093 - Fix compilation with OpenSSL 1.1 and less commonly-used CPU
16094 architectures. Closes ticket 20588.
16095 - Use ECDHE ciphers instead of ECDH in tortls tests. LibreSSL has
16096 removed the ECDH ciphers which caused the tests to fail on
16097 platforms which use it. Fixes bug 20460; bugfix on 0.2.8.1-alpha.
16098 - Fix implicit conversion warnings under OpenSSL 1.1. Fixes bug
16099 20551; bugfix on 0.2.1.1-alpha.
16101 o Minor bugfixes (relay bootstrap):
16102 - Ensure relays don't make multiple connections during bootstrap.
16103 Fixes bug 20591; bugfix on 0.2.8.1-alpha.
16105 o Minor bugfixes (relay):
16106 - Work around a memory leak in OpenSSL 1.1 when encoding public
16107 keys. Fixes bug 20553; bugfix on 0.0.2pre8.
16108 - Avoid a small memory leak when informing worker threads about
16109 rotated onion keys. Fixes bug 20401; bugfix on 0.2.6.3-alpha.
16110 - Do not try to parallelize workers more than 16x without the user
16111 explicitly configuring us to do so, even if we do detect more than
16112 16 CPU cores. Fixes bug 19968; bugfix on 0.2.3.1-alpha.
16114 o Minor bugfixes (single onion services):
16115 - Start correctly when creating a single onion service in a
16116 directory that did not previously exist. Fixes bug 20484; bugfix
16119 o Minor bugfixes (testing):
16120 - Avoid a unit test failure on systems with over 16 detectable CPU
16121 cores. Fixes bug 19968; bugfix on 0.2.3.1-alpha.
16124 - Clarify that setting HiddenServiceNonAnonymousMode requires you to
16125 also set "SOCKSPort 0". Fixes bug 20487; bugfix on 0.2.9.3-alpha.
16126 - Module-level documentation for several more modules. Closes
16127 tickets 19287 and 19290.
16130 Changes in version 0.2.8.9 - 2016-10-17
16131 Tor 0.2.8.9 backports a fix for a security hole in previous versions
16132 of Tor that would allow a remote attacker to crash a Tor client,
16133 hidden service, relay, or authority. All Tor users should upgrade to
16134 this version, or to 0.2.9.4-alpha. Patches will be released for older
16137 o Major features (security fixes, also in 0.2.9.4-alpha):
16138 - Prevent a class of security bugs caused by treating the contents
16139 of a buffer chunk as if they were a NUL-terminated string. At
16140 least one such bug seems to be present in all currently used
16141 versions of Tor, and would allow an attacker to remotely crash
16142 most Tor instances, especially those compiled with extra compiler
16143 hardening. With this defense in place, such bugs can't crash Tor,
16144 though we should still fix them as they occur. Closes ticket
16145 20384 (TROVE-2016-10-001).
16147 o Minor features (geoip):
16148 - Update geoip and geoip6 to the October 4 2016 Maxmind GeoLite2
16152 Changes in version 0.2.9.4-alpha - 2016-10-17
16153 Tor 0.2.9.4-alpha fixes a security hole in previous versions of Tor
16154 that would allow a remote attacker to crash a Tor client, hidden
16155 service, relay, or authority. All Tor users should upgrade to this
16156 version, or to 0.2.8.9. Patches will be released for older versions
16159 Tor 0.2.9.4-alpha also adds numerous small features and fix-ups to
16160 previous versions of Tor, including the implementation of a feature to
16161 future- proof the Tor ecosystem against protocol changes, some bug
16162 fixes necessary for Tor Browser to use unix domain sockets correctly,
16163 and several portability improvements. We anticipate that this will be
16164 the last alpha in the Tor 0.2.9 series, and that the next release will
16165 be a release candidate.
16167 o Major features (security fixes):
16168 - Prevent a class of security bugs caused by treating the contents
16169 of a buffer chunk as if they were a NUL-terminated string. At
16170 least one such bug seems to be present in all currently used
16171 versions of Tor, and would allow an attacker to remotely crash
16172 most Tor instances, especially those compiled with extra compiler
16173 hardening. With this defense in place, such bugs can't crash Tor,
16174 though we should still fix them as they occur. Closes ticket
16175 20384 (TROVE-2016-10-001).
16177 o Major features (subprotocol versions):
16178 - Tor directory authorities now vote on a set of recommended
16179 subprotocol versions, and on a set of required subprotocol
16180 versions. Clients and relays that lack support for a _required_
16181 subprotocol version will not start; those that lack support for a
16182 _recommended_ subprotocol version will warn the user to upgrade.
16183 Closes ticket 19958; implements part of proposal 264.
16184 - Tor now uses "subprotocol versions" to indicate compatibility.
16185 Previously, versions of Tor looked at the declared Tor version of
16186 a relay to tell whether they could use a given feature. Now, they
16187 should be able to rely on its declared subprotocol versions. This
16188 change allows compatible implementations of the Tor protocol(s) to
16189 exist without pretending to be 100% bug-compatible with particular
16190 releases of Tor itself. Closes ticket 19958; implements part of
16193 o Minor feature (fallback directories):
16194 - Remove broken fallbacks from the hard-coded fallback directory
16195 list. Closes ticket 20190; patch by teor.
16197 o Minor features (client, directory):
16198 - Since authorities now omit all routers that lack the Running and
16199 Valid flags, we assume that any relay listed in the consensus must
16200 have those flags. Closes ticket 20001; implements part of
16203 o Minor features (compilation, portability):
16204 - Compile correctly on MacOS 10.12 (aka "Sierra"). Closes
16207 o Minor features (development tools, etags):
16208 - Teach the "make tags" Makefile target how to correctly find
16209 "MOCK_IMPL" function definitions. Patch from nherring; closes
16212 o Minor features (geoip):
16213 - Update geoip and geoip6 to the October 4 2016 Maxmind GeoLite2
16216 o Minor features (unix domain sockets):
16217 - When configuring a unix domain socket for a SocksPort,
16218 ControlPort, or Hidden service, you can now wrap the address in
16219 quotes, using C-style escapes inside the quotes. This allows unix
16220 domain socket paths to contain spaces.
16222 o Minor features (virtual addresses):
16223 - Increase the maximum number of bits for the IPv6 virtual network
16224 prefix from 16 to 104. In this way, the condition for address
16225 allocation is less restrictive. Closes ticket 20151; feature
16228 o Minor bugfixes (address discovery):
16229 - Stop reordering IP addresses returned by the OS. This makes it
16230 more likely that Tor will guess the same relay IP address every
16231 time. Fixes issue 20163; bugfix on 0.2.7.1-alpha, ticket 17027.
16232 Reported by René Mayrhofer, patch by "cypherpunks".
16234 o Minor bugfixes (client, unix domain sockets):
16235 - Disable IsolateClientAddr when using AF_UNIX backed SocksPorts as
16236 the client address is meaningless. Fixes bug 20261; bugfix
16239 o Minor bugfixes (compilation, OpenBSD):
16240 - Detect Libevent2 functions correctly on systems that provide
16241 libevent2, but where libevent1 is linked with -levent. Fixes bug
16242 19904; bugfix on 0.2.2.24-alpha. Patch from Rubiate.
16244 o Minor bugfixes (configuration):
16245 - When parsing quoted configuration values from the torrc file,
16246 handle windows line endings correctly. Fixes bug 19167; bugfix on
16247 0.2.0.16-alpha. Patch from "Pingl".
16249 o Minor bugfixes (getpass):
16250 - Defensively fix a non-triggerable heap corruption at do_getpass()
16251 to protect ourselves from mistakes in the future. Fixes bug
16252 19223; bugfix on 0.2.7.3-rc. Bug found by Guido Vranken, patch
16255 o Minor bugfixes (hidden service):
16256 - Allow hidden services to run on IPv6 addresses even when the
16257 IPv6Exit option is not set. Fixes bug 18357; bugfix
16261 - Add module-level internal documentation for 36 C files that
16262 previously didn't have a high-level overview. Closes ticket #20385.
16264 o Required libraries:
16265 - When building with OpenSSL, Tor now requires version 1.0.1 or
16266 later. OpenSSL 1.0.0 and earlier are no longer supported by the
16267 OpenSSL team, and should not be used. Closes ticket 20303.
16270 Changes in version 0.2.9.3-alpha - 2016-09-23
16271 Tor 0.2.9.3-alpha adds improved support for entities that want to make
16272 high-performance services available through the Tor .onion mechanism
16273 without themselves receiving anonymity as they host those services. It
16274 also tries harder to ensure that all steps on a circuit are using the
16275 strongest crypto possible, strengthens some TLS properties, and
16276 resolves several bugs -- including a pair of crash bugs from the 0.2.8
16277 series. Anybody running an earlier version of 0.2.9.x should upgrade.
16279 o Major bugfixes (crash, also in 0.2.8.8):
16280 - Fix a complicated crash bug that could affect Tor clients
16281 configured to use bridges when replacing a networkstatus consensus
16282 in which one of their bridges was mentioned. OpenBSD users saw
16283 more crashes here, but all platforms were potentially affected.
16284 Fixes bug 20103; bugfix on 0.2.8.2-alpha.
16286 o Major bugfixes (relay, OOM handler, also in 0.2.8.8):
16287 - Fix a timing-dependent assertion failure that could occur when we
16288 tried to flush from a circuit after having freed its cells because
16289 of an out-of-memory condition. Fixes bug 20203; bugfix on
16290 0.2.8.1-alpha. Thanks to "cypherpunks" for help diagnosing
16293 o Major features (circuit building, security):
16294 - Authorities, relays and clients now require ntor keys in all
16295 descriptors, for all hops (except for rare hidden service protocol
16296 cases), for all circuits, and for all other roles. Part of
16298 - Tor authorities, relays, and clients only use ntor, except for
16299 rare cases in the hidden service protocol. Part of ticket 19163.
16301 o Major features (single-hop "hidden" services):
16302 - Add experimental HiddenServiceSingleHopMode and
16303 HiddenServiceNonAnonymousMode options. When both are set to 1,
16304 every hidden service on a Tor instance becomes a non-anonymous
16305 Single Onion Service. Single Onions make one-hop (direct)
16306 connections to their introduction and rendezvous points. One-hop
16307 circuits make Single Onion servers easily locatable, but clients
16308 remain location-anonymous. This is compatible with the existing
16309 hidden service implementation, and works on the current tor
16310 network without any changes to older relays or clients. Implements
16311 proposal 260, completes ticket 17178. Patch by teor and asn.
16313 o Major features (resource management):
16314 - Tor can now notice it is about to run out of sockets, and
16315 preemptively close connections of lower priority. (This feature is
16316 off by default for now, since the current prioritizing method is
16317 yet not mature enough. You can enable it by setting
16318 "DisableOOSCheck 0", but watch out: it might close some sockets
16319 you would rather have it keep.) Closes ticket 18640.
16321 o Major bugfixes (circuit building):
16322 - Hidden service client-to-intro-point and service-to-rendezvous-
16323 point circuits use the TAP key supplied by the protocol, to avoid
16324 epistemic attacks. Fixes bug 19163; bugfix on 0.2.4.18-rc.
16326 o Major bugfixes (compilation, OpenBSD):
16327 - Fix a Libevent-detection bug in our autoconf script that would
16328 prevent Tor from linking successfully on OpenBSD. Patch from
16329 rubiate. Fixes bug 19902; bugfix on 0.2.9.1-alpha.
16331 o Major bugfixes (hidden services):
16332 - Clients now require hidden services to include the TAP keys for
16333 their intro points in the hidden service descriptor. This prevents
16334 an inadvertent upgrade to ntor, which a malicious hidden service
16335 could use to distinguish clients by consensus version. Fixes bug
16336 20012; bugfix on 0.2.4.8-alpha. Patch by teor.
16338 o Minor features (security, TLS):
16339 - Servers no longer support clients that without AES ciphersuites.
16340 (3DES is no longer considered an acceptable cipher.) We believe
16341 that no such Tor clients currently exist, since Tor has required
16342 OpenSSL 0.9.7 or later since 2009. Closes ticket 19998.
16344 o Minor feature (fallback directories):
16345 - Remove 8 fallbacks that are no longer suitable, leaving 81 of the
16346 100 fallbacks originally introduced in Tor 0.2.8.2-alpha in March
16347 2016. Closes ticket 20190; patch by teor.
16349 o Minor features (geoip, also in 0.2.8.8):
16350 - Update geoip and geoip6 to the September 6 2016 Maxmind GeoLite2
16353 o Minor feature (port flags):
16354 - Add new flags to the *Port options to finer control over which
16355 requests are allowed. The flags are NoDNSRequest, NoOnionTraffic,
16356 and the synthetic flag OnionTrafficOnly, which is equivalent to
16357 NoDNSRequest, NoIPv4Traffic, and NoIPv6Traffic. Closes enhancement
16358 18693; patch by "teor".
16360 o Minor features (directory authority):
16361 - After voting, if the authorities decide that a relay is not
16362 "Valid", they no longer include it in the consensus at all. Closes
16363 ticket 20002; implements part of proposal 272.
16365 o Minor features (testing):
16366 - Disable memory protections on OpenBSD when performing our unit
16367 tests for memwipe(). The test deliberately invokes undefined
16368 behavior, and the OpenBSD protections interfere with this. Patch
16369 from "rubiate". Closes ticket 20066.
16371 o Minor features (testing, ipv6):
16372 - Add the single-onion and single-onion-ipv6 chutney targets to
16373 "make test-network-all". This requires a recent chutney version
16374 with the single onion network flavours (git c72a652 or later).
16375 Closes ticket 20072; patch by teor.
16376 - Add the hs-ipv6 chutney target to make test-network-all's IPv6
16377 tests. Remove bridges+hs, as it's somewhat redundant. This
16378 requires a recent chutney version that supports IPv6 clients,
16379 relays, and authorities. Closes ticket 20069; patch by teor.
16381 o Minor features (Tor2web):
16382 - Make Tor2web clients respect ReachableAddresses. This feature was
16383 inadvertently enabled in 0.2.8.6, then removed by bugfix 19973 on
16384 0.2.8.7. Implements feature 20034. Patch by teor.
16386 o Minor features (unit tests):
16387 - We've done significant work to make the unit tests run faster.
16388 - Our link-handshake unit tests now check that when invalid
16389 handshakes fail, they fail with the error messages we expected.
16390 - Our unit testing code that captures log messages no longer
16391 prevents them from being written out if the user asked for them
16392 (by passing --debug or --info or or --notice --warn to the "test"
16393 binary). This change prevents us from missing unexpected log
16394 messages simply because we were looking for others. Related to
16396 - The unit tests now log all warning messages with the "BUG" flag.
16397 Previously, they only logged errors by default. This change will
16398 help us make our testing code more correct, and make sure that we
16399 only hit this code when we mean to. In the meantime, however,
16400 there will be more warnings in the unit test logs than before.
16401 This is preparatory work for ticket 19999.
16402 - The unit tests now treat any failure of a "tor_assert_nonfatal()"
16403 assertion as a test failure.
16405 o Minor bug fixes (circuits):
16406 - Use the CircuitBuildTimeout option whenever
16407 LearnCircuitBuildTimeout is disabled. Previously, we would respect
16408 the option when a user disabled it, but not when it was disabled
16409 because some other option was set. Fixes bug 20073; bugfix on
16410 0.2.4.12-alpha. Patch by teor.
16412 o Minor bugfixes (allocation):
16413 - Change how we allocate memory for large chunks on buffers, to
16414 avoid a (currently impossible) integer overflow, and to waste less
16415 space when allocating unusually large chunks. Fixes bug 20081;
16416 bugfix on 0.2.0.16-alpha. Issue identified by Guido Vranken.
16417 - Always include orconfig.h before including any other C headers.
16418 Sometimes, it includes macros that affect the behavior of the
16419 standard headers. Fixes bug 19767; bugfix on 0.2.9.1-alpha (the
16420 first version to use AC_USE_SYSTEM_EXTENSIONS).
16421 - Fix a syntax error in the IF_BUG_ONCE__() macro in non-GCC-
16422 compatible compilers. Fixes bug 20141; bugfix on 0.2.9.1-alpha.
16423 Patch from Gisle Vanem.
16424 - Stop trying to build with Clang 4.0's -Wthread-safety warnings.
16425 They apparently require a set of annotations that we aren't
16426 currently using, and they create false positives in our pthreads
16427 wrappers. Fixes bug 20110; bugfix on 0.2.9.1-alpha.
16429 o Minor bugfixes (directory authority):
16430 - Die with a more useful error when the operator forgets to place
16431 the authority_signing_key file into the keys directory. This
16432 avoids an uninformative assert & traceback about having an invalid
16433 key. Fixes bug 20065; bugfix on 0.2.0.1-alpha.
16434 - When allowing private addresses, mark Exits that only exit to
16435 private locations as such. Fixes bug 20064; bugfix
16438 o Minor bugfixes (documentation):
16439 - Document the default PathsNeededToBuildCircuits value that's used
16440 by clients when the directory authorities don't set
16441 min_paths_for_circs_pct. Fixes bug 20117; bugfix on 02c320916e02
16442 in 0.2.4.10-alpha. Patch by teor, reported by Jesse V.
16443 - Fix manual for the User option: it takes a username, not a UID.
16444 Fixes bug 19122; bugfix on 0.0.2pre16 (the first version to have
16447 o Minor bugfixes (hidden services):
16448 - Stop logging intro point details to the client log on certain
16449 error conditions. Fixed as part of bug 20012; bugfix on
16450 0.2.4.8-alpha. Patch by teor.
16452 o Minor bugfixes (IPv6, testing):
16453 - Check for IPv6 correctly on Linux when running test networks.
16454 Fixes bug 19905; bugfix on 0.2.7.3-rc; patch by teor.
16456 o Minor bugfixes (Linux seccomp2 sandbox):
16457 - Add permission to run the sched_yield() and sigaltstack() system
16458 calls, in order to support versions of Tor compiled with asan or
16459 ubsan code that use these calls. Now "sandbox 1" and
16460 "--enable-expensive-hardening" should be compatible on more
16461 systems. Fixes bug 20063; bugfix on 0.2.5.1-alpha.
16463 o Minor bugfixes (logging):
16464 - When logging a message from the BUG() macro, be explicit about
16465 what we were asserting. Previously we were confusing what we were
16466 asserting with what the bug was. Fixes bug 20093; bugfix
16468 - When we are unable to remove the bw_accounting file, do not warn
16469 if the reason we couldn't remove it was that it didn't exist.
16470 Fixes bug 19964; bugfix on 0.2.5.4-alpha. Patch from 'pastly'.
16472 o Minor bugfixes (option parsing):
16473 - Count unix sockets when counting client listeners (SOCKS, Trans,
16474 NATD, and DNS). This has no user-visible behaviour changes: these
16475 options are set once, and never read. Required for correct
16476 behaviour in ticket 17178. Fixes bug 19677; bugfix on
16477 0.2.6.3-alpha. Patch by teor.
16479 o Minor bugfixes (options):
16480 - Check the consistency of UseEntryGuards and EntryNodes more
16481 reliably. Fixes bug 20074; bugfix on 0.2.4.12-alpha. Patch
16483 - Stop changing the configured value of UseEntryGuards on
16484 authorities and Tor2web clients. Fixes bug 20074; bugfix on
16485 commits 51fc6799 in 0.1.1.16-rc and acda1735 in 0.2.4.3-alpha.
16488 o Minor bugfixes (Tor2web):
16489 - Prevent Tor2web clients running hidden services, these services
16490 are not anonymous due to the one-hop client paths. Fixes bug
16491 19678. Patch by teor.
16493 o Minor bugfixes (unit tests):
16494 - Fix a shared-random unit test that was failing on big endian
16495 architectures due to internal representation of a integer copied
16496 to a buffer. The test is changed to take a full 32 bytes of data
16497 and use the output of a python script that make the COMMIT and
16498 REVEAL calculation according to the spec. Fixes bug 19977; bugfix
16500 - The tor_tls_server_info_callback unit test no longer crashes when
16501 debug-level logging is turned on. Fixes bug 20041; bugfix
16505 Changes in version 0.2.8.8 - 2016-09-23
16506 Tor 0.2.8.8 fixes two crash bugs present in previous versions of the
16507 0.2.8.x series. Relays running 0.2.8.x should upgrade, as should users
16508 who select public relays as their bridges.
16510 o Major bugfixes (crash):
16511 - Fix a complicated crash bug that could affect Tor clients
16512 configured to use bridges when replacing a networkstatus consensus
16513 in which one of their bridges was mentioned. OpenBSD users saw
16514 more crashes here, but all platforms were potentially affected.
16515 Fixes bug 20103; bugfix on 0.2.8.2-alpha.
16517 o Major bugfixes (relay, OOM handler):
16518 - Fix a timing-dependent assertion failure that could occur when we
16519 tried to flush from a circuit after having freed its cells because
16520 of an out-of-memory condition. Fixes bug 20203; bugfix on
16521 0.2.8.1-alpha. Thanks to "cypherpunks" for help diagnosing
16524 o Minor feature (fallback directories):
16525 - Remove 8 fallbacks that are no longer suitable, leaving 81 of the
16526 100 fallbacks originally introduced in Tor 0.2.8.2-alpha in March
16527 2016. Closes ticket 20190; patch by teor.
16529 o Minor features (geoip):
16530 - Update geoip and geoip6 to the September 6 2016 Maxmind GeoLite2
16534 Changes in version 0.2.9.2-alpha - 2016-08-24
16535 Tor 0.2.9.2-alpha continues development of the 0.2.9 series with
16536 several new features and bugfixes. It also includes an important
16537 authority update and an important bugfix from 0.2.8.7. Everyone who
16538 sets the ReachableAddresses option, and all bridges, are strongly
16539 encouraged to upgrade to 0.2.8.7, or to 0.2.9.2-alpha.
16541 o Directory authority changes (also in 0.2.8.7):
16542 - The "Tonga" bridge authority has been retired; the new bridge
16543 authority is "Bifroest". Closes tickets 19728 and 19690.
16545 o Major bugfixes (client, security, also in 0.2.8.7):
16546 - Only use the ReachableAddresses option to restrict the first hop
16547 in a path. In earlier versions of 0.2.8.x, it would apply to
16548 every hop in the path, with a possible degradation in anonymity
16549 for anyone using an uncommon ReachableAddress setting. Fixes bug
16550 19973; bugfix on 0.2.8.2-alpha.
16552 o Major features (user interface):
16553 - Tor now supports the ability to declare options deprecated, so
16554 that we can recommend that people stop using them. Previously,
16555 this was done in an ad-hoc way. Closes ticket 19820.
16557 o Major bugfixes (directory downloads):
16558 - Avoid resetting download status for consensuses hourly, since we
16559 already have another, smarter retry mechanism. Fixes bug 8625;
16560 bugfix on 0.2.0.9-alpha.
16562 o Minor features (config):
16563 - Warn users when descriptor and port addresses are inconsistent.
16564 Mitigates bug 13953; patch by teor.
16566 o Minor features (geoip):
16567 - Update geoip and geoip6 to the August 2 2016 Maxmind GeoLite2
16570 o Minor features (user interface):
16571 - There is a new --list-deprecated-options command-line option to
16572 list all of the deprecated options. Implemented as part of
16575 o Minor bugfixes (code style):
16576 - Fix an integer signedness conversion issue in the case conversion
16577 tables. Fixes bug 19168; bugfix on 0.2.1.11-alpha.
16579 o Minor bugfixes (compilation):
16580 - Build correctly on versions of libevent2 without support for
16581 evutil_secure_rng_add_bytes(). Fixes bug 19904; bugfix
16583 - Fix a compilation warning on GCC versions before 4.6. Our
16584 ENABLE_GCC_WARNING macro used the word "warning" as an argument,
16585 when it is also required as an argument to the compiler pragma.
16586 Fixes bug 19901; bugfix on 0.2.9.1-alpha.
16588 o Minor bugfixes (compilation, also in 0.2.8.7):
16589 - Remove an inappropriate "inline" in tortls.c that was causing
16590 warnings on older versions of GCC. Fixes bug 19903; bugfix
16593 o Minor bugfixes (fallback directories, also in 0.2.8.7):
16594 - Avoid logging a NULL string pointer when loading fallback
16595 directory information. Fixes bug 19947; bugfix on 0.2.4.7-alpha
16596 and 0.2.8.1-alpha. Report and patch by "rubiate".
16598 o Minor bugfixes (logging):
16599 - Log a more accurate message when we fail to dump a microdescriptor.
16600 Fixes bug 17758; bugfix on 0.2.2.8-alpha. Patch from Daniel Pinto.
16602 o Minor bugfixes (memory leak):
16603 - Fix a series of slow memory leaks related to parsing torrc files
16604 and options. Fixes bug 19466; bugfix on 0.2.1.6-alpha.
16606 o Deprecated features:
16607 - A number of DNS-cache-related sub-options for client ports are now
16608 deprecated for security reasons, and may be removed in a future
16609 version of Tor. (We believe that client-side DNS caching is a bad
16610 idea for anonymity, and you should not turn it on.) The options
16611 are: CacheDNS, CacheIPv4DNS, CacheIPv6DNS, UseDNSCache,
16612 UseIPv4Cache, and UseIPv6Cache.
16613 - A number of options are deprecated for security reasons, and may
16614 be removed in a future version of Tor. The options are:
16615 AllowDotExit, AllowInvalidNodes, AllowSingleHopCircuits,
16616 AllowSingleHopExits, ClientDNSRejectInternalAddresses,
16617 CloseHSClientCircuitsImmediatelyOnTimeout,
16618 CloseHSServiceRendCircuitsImmediatelyOnTimeout,
16619 ExcludeSingleHopRelays, FastFirstHopPK, TLSECGroup,
16620 UseNTorHandshake, and WarnUnsafeSocks.
16621 - The *ListenAddress options are now deprecated as unnecessary: the
16622 corresponding *Port options should be used instead. These options
16623 may someday be removed. The affected options are:
16624 ControlListenAddress, DNSListenAddress, DirListenAddress,
16625 NATDListenAddress, ORListenAddress, SocksListenAddress,
16626 and TransListenAddress.
16629 - Correct the IPv6 syntax in our documentation for the
16630 VirtualAddrNetworkIPv6 torrc option. Closes ticket 19743.
16633 - We no longer include the (dead, deprecated) bufferevent code in
16634 Tor. Closes ticket 19450. Based on a patch from U+039b.
16637 Changes in version 0.2.8.7 - 2016-08-24
16638 Tor 0.2.8.7 fixes an important bug related to the ReachableAddresses
16639 option in 0.2.8.6, and replaces a retiring bridge authority. Everyone
16640 who sets the ReachableAddresses option, and all bridges, are strongly
16641 encouraged to upgrade.
16643 o Directory authority changes:
16644 - The "Tonga" bridge authority has been retired; the new bridge
16645 authority is "Bifroest". Closes tickets 19728 and 19690.
16647 o Major bugfixes (client, security):
16648 - Only use the ReachableAddresses option to restrict the first hop
16649 in a path. In earlier versions of 0.2.8.x, it would apply to
16650 every hop in the path, with a possible degradation in anonymity
16651 for anyone using an uncommon ReachableAddress setting. Fixes bug
16652 19973; bugfix on 0.2.8.2-alpha.
16654 o Minor features (geoip):
16655 - Update geoip and geoip6 to the August 2 2016 Maxmind GeoLite2
16658 o Minor bugfixes (compilation):
16659 - Remove an inappropriate "inline" in tortls.c that was causing
16660 warnings on older versions of GCC. Fixes bug 19903; bugfix
16663 o Minor bugfixes (fallback directories):
16664 - Avoid logging a NULL string pointer when loading fallback
16665 directory information. Fixes bug 19947; bugfix on 0.2.4.7-alpha
16666 and 0.2.8.1-alpha. Report and patch by "rubiate".
16669 Changes in version 0.2.9.1-alpha - 2016-08-08
16670 Tor 0.2.9.1-alpha is the first alpha release in the 0.2.9 development
16671 series. It improves our support for hardened builds and compiler
16672 warnings, deploys some critical infrastructure for improvements to
16673 hidden services, includes a new timing backend that we hope to use for
16674 better support for traffic padding, makes it easier for programmers to
16675 log unexpected events, and contains other small improvements to
16676 security, correctness, and performance.
16678 Below are the changes since 0.2.8.6.
16680 o New system requirements:
16681 - Tor now requires Libevent version 2.0.10-stable or later. Older
16682 versions of Libevent have less efficient backends for several
16683 platforms, and lack the DNS code that we use for our server-side
16684 DNS support. This implements ticket 19554.
16685 - Tor now requires zlib version 1.2 or later, for security,
16686 efficiency, and (eventually) gzip support. (Back when we started,
16687 zlib 1.1 and zlib 1.0 were still found in the wild. 1.2 was
16688 released in 2003. We recommend the latest version.)
16690 o Major features (build, hardening):
16691 - Tor now builds with -ftrapv by default on compilers that support
16692 it. This option detects signed integer overflow (which C forbids),
16693 and turns it into a hard-failure. We do not apply this option to
16694 code that needs to run in constant time to avoid side-channels;
16695 instead, we use -fwrapv in that code. Closes ticket 17983.
16696 - When --enable-expensive-hardening is selected, stop applying the
16697 clang/gcc sanitizers to code that needs to run in constant time.
16698 Although we are aware of no introduced side-channels, we are not
16699 able to prove that there are none. Related to ticket 17983.
16701 o Major features (compilation):
16702 - Our big list of extra GCC warnings is now enabled by default when
16703 building with GCC (or with anything like Clang that claims to be
16704 GCC-compatible). To make all warnings into fatal compilation
16705 errors, pass --enable-fatal-warnings to configure. Closes
16707 - Use the Autoconf macro AC_USE_SYSTEM_EXTENSIONS to automatically
16708 turn on C and POSIX extensions. (Previously, we attempted to do
16709 this on an ad hoc basis.) Closes ticket 19139.
16711 o Major features (directory authorities, hidden services):
16712 - Directory authorities can now perform the shared randomness
16713 protocol specified by proposal 250. Using this protocol, directory
16714 authorities generate a global fresh random value every day. In the
16715 future, this value will be used by hidden services to select
16716 HSDirs. This release implements the directory authority feature;
16717 the hidden service side will be implemented in the future as part
16718 of proposal 224. Resolves ticket 16943; implements proposal 250.
16720 o Major features (downloading, random exponential backoff):
16721 - When we fail to download an object from a directory service, wait
16722 for an (exponentially increasing) randomized amount of time before
16723 retrying, rather than a fixed interval as we did before. This
16724 prevents a group of Tor instances from becoming too synchronized,
16725 or a single Tor instance from becoming too predictable, in its
16726 download schedule. Closes ticket 15942.
16728 o Major bugfixes (exit policies):
16729 - Avoid disclosing exit outbound bind addresses, configured port
16730 bind addresses, and local interface addresses in relay descriptors
16731 by default under ExitPolicyRejectPrivate. Instead, only reject
16732 these (otherwise unlisted) addresses if
16733 ExitPolicyRejectLocalInterfaces is set. Fixes bug 18456; bugfix on
16734 0.2.7.2-alpha. Patch by teor.
16736 o Major bugfixes (hidden service client):
16737 - Allow Tor clients with appropriate controllers to work with
16738 FetchHidServDescriptors set to 0. Previously, this option also
16739 disabled descriptor cache lookup, thus breaking hidden services
16740 entirely. Fixes bug 18704; bugfix on 0.2.0.20-rc. Patch by "twim".
16742 o Minor features (build, hardening):
16743 - Detect and work around a libclang_rt problem that would prevent
16744 clang from finding __mulodi4() on some 32-bit platforms, and thus
16745 keep -ftrapv from linking on those systems. Closes ticket 19079.
16746 - When building on a system without runtime support for the runtime
16747 hardening options, try to log a useful warning at configuration
16748 time, rather than an incomprehensible warning at link time. If
16749 expensive hardening was requested, this warning becomes an error.
16750 Closes ticket 18895.
16752 o Minor features (code safety):
16753 - In our integer-parsing functions, ensure that maxiumum value we
16754 give is no smaller than the minimum value. Closes ticket 19063;
16757 o Minor features (controller):
16758 - Implement new GETINFO queries for all downloads that use
16759 download_status_t to schedule retries. This allows controllers to
16760 examine the schedule for pending downloads. Closes ticket 19323.
16761 - Allow controllers to configure basic client authorization on
16762 hidden services when they create them with the ADD_ONION control
16763 command. Implements ticket 15588. Patch by "special".
16764 - Fire a STATUS_SERVER controller event whenever the hibernation
16765 status changes between "awake"/"soft"/"hard". Closes ticket 18685.
16767 o Minor features (directory authority):
16768 - Directory authorities now only give the Guard flag to a relay if
16769 they are also giving it the Stable flag. This change allows us to
16770 simplify path selection for clients. It should have minimal effect
16771 in practice, since >99% of Guards already have the Stable flag.
16772 Implements ticket 18624.
16773 - Directory authorities now write their v3-status-votes file out to
16774 disk earlier in the consensus process, so we have a record of the
16775 votes even if we abort the consensus process. Resolves
16778 o Minor features (hidden service):
16779 - Stop being so strict about the payload length of "rendezvous1"
16780 cells. We used to be locked in to the "TAP" handshake length, and
16781 now we can handle better handshakes like "ntor". Resolves
16784 o Minor features (infrastructure, time):
16785 - Tor now uses the operating system's monotonic timers (where
16786 available) for internal fine-grained timing. Previously we would
16787 look at the system clock, and then attempt to compensate for the
16788 clock running backwards. Closes ticket 18908.
16789 - Tor now includes an improved timer backend, so that we can
16790 efficiently support tens or hundreds of thousands of concurrent
16791 timers, as will be needed for some of our planned anti-traffic-
16792 analysis work. This code is based on William Ahern's "timeout.c"
16793 project, which implements a "tickless hierarchical timing wheel".
16794 Closes ticket 18365.
16796 o Minor features (logging):
16797 - Provide a more useful warning message when configured with an
16798 invalid Nickname. Closes ticket 18300; patch from "icanhasaccount".
16799 - When dumping unparseable router descriptors, optionally store them
16800 in separate files, named by digest, up to a configurable size
16801 limit. You can change the size limit by setting the
16802 MaxUnparseableDescSizeToLog option, and disable this feature by
16803 setting that option to 0. Closes ticket 18322.
16804 - Add a set of macros to check nonfatal assertions, for internal
16805 use. Migrating more of our checks to these should help us avoid
16806 needless crash bugs. Closes ticket 18613.
16808 o Minor features (performance):
16809 - Change the "optimistic data" extension from "off by default" to
16810 "on by default". The default was ordinarily overridden by a
16811 consensus option, but when clients were bootstrapping for the
16812 first time, they would not have a consensus to get the option
16813 from. Changing this default saves a round-trip during startup.
16814 Closes ticket 18815.
16816 o Minor features (relay, usability):
16817 - When the directory authorities refuse a bad relay's descriptor,
16818 encourage the relay operator to contact us. Many relay operators
16819 won't notice this line in their logs, but it's a win if even a few
16820 learn why we don't like what their relay was doing. Resolves
16823 o Minor features (testing):
16824 - Let backtrace tests work correctly under AddressSanitizer. Fixes
16825 part of bug 18934; bugfix on 0.2.5.2-alpha.
16826 - Move the test-network.sh script to chutney, and modify tor's test-
16827 network.sh to call the (newer) chutney version when available.
16828 Resolves ticket 19116. Patch by teor.
16829 - Use the lcov convention for marking lines as unreachable, so that
16830 we don't count them when we're generating test coverage data.
16831 Update our coverage tools to understand this convention. Closes
16834 o Minor bugfixes (bootstrap):
16835 - Remember the directory we fetched the consensus or previous
16836 certificates from, and use it to fetch future authority
16837 certificates. This change improves bootstrapping performance.
16838 Fixes bug 18963; bugfix on 0.2.8.1-alpha.
16840 o Minor bugfixes (build):
16841 - The test-stem and test-network makefile targets now depend only on
16842 the tor binary that they are testing. Previously, they depended on
16843 "make all". Fixes bug 18240; bugfix on 0.2.8.2-alpha. Based on a
16844 patch from "cypherpunks".
16846 o Minor bugfixes (circuits):
16847 - Make sure extend_info_from_router() is only called on servers.
16848 Fixes bug 19639; bugfix on 0.2.8.1-alpha.
16850 o Minor bugfixes (compilation):
16851 - When building with Clang, use a full set of GCC warnings.
16852 (Previously, we included only a subset, because of the way we
16853 detected them.) Fixes bug 19216; bugfix on 0.2.0.1-alpha.
16855 o Minor bugfixes (directory authority):
16856 - Authorities now sort the "package" lines in their votes, for ease
16857 of debugging. (They are already sorted in consensus documents.)
16858 Fixes bug 18840; bugfix on 0.2.6.3-alpha.
16859 - When parsing a detached signature, make sure we use the length of
16860 the digest algorithm instead of an hardcoded DIGEST256_LEN in
16861 order to avoid comparing bytes out-of-bounds with a smaller digest
16862 length such as SHA1. Fixes bug 19066; bugfix on 0.2.2.6-alpha.
16864 o Minor bugfixes (documentation):
16865 - Document the --passphrase-fd option in the tor manpage. Fixes bug
16866 19504; bugfix on 0.2.7.3-rc.
16867 - Fix the description of the --passphrase-fd option in the
16868 tor-gencert manpage. The option is used to pass the number of a
16869 file descriptor to read the passphrase from, not to read the file
16870 descriptor from. Fixes bug 19505; bugfix on 0.2.0.20-alpha.
16872 o Minor bugfixes (ephemeral hidden service):
16873 - When deleting an ephemeral hidden service, close its intro points
16874 even if they are not completely open. Fixes bug 18604; bugfix
16877 o Minor bugfixes (guard selection):
16878 - Use a single entry guard even if the NumEntryGuards consensus
16879 parameter is not provided. Fixes bug 17688; bugfix
16881 - Don't mark guards as unreachable if connection_connect() fails.
16882 That function fails for local reasons, so it shouldn't reveal
16883 anything about the status of the guard. Fixes bug 14334; bugfix
16886 o Minor bugfixes (hidden service client):
16887 - Increase the minimum number of internal circuits we preemptively
16888 build from 2 to 3, so a circuit is available when a client
16889 connects to another onion service. Fixes bug 13239; bugfix
16892 o Minor bugfixes (logging):
16893 - When logging a directory ownership mismatch, log the owning
16894 username correctly. Fixes bug 19578; bugfix on 0.2.2.29-beta.
16896 o Minor bugfixes (memory leaks):
16897 - Fix a small, uncommon memory leak that could occur when reading a
16898 truncated ed25519 key file. Fixes bug 18956; bugfix
16901 o Minor bugfixes (testing):
16902 - Allow clients to retry HSDirs much faster in test networks. Fixes
16903 bug 19702; bugfix on 0.2.7.1-alpha. Patch by teor.
16904 - Disable ASAN's detection of segmentation faults while running
16905 test_bt.sh, so that we can make sure that our own backtrace
16906 generation code works. Fixes another aspect of bug 18934; bugfix
16907 on 0.2.5.2-alpha. Patch from "cypherpunks".
16908 - Fix the test-network-all target on out-of-tree builds by using the
16909 correct path to the test driver script. Fixes bug 19421; bugfix
16912 o Minor bugfixes (time):
16913 - Improve overflow checks in tv_udiff and tv_mdiff. Fixes bug 19483;
16914 bugfix on all released tor versions.
16915 - When computing the difference between two times in milliseconds,
16916 we now round to the nearest millisecond correctly. Previously, we
16917 could sometimes round in the wrong direction. Fixes bug 19428;
16918 bugfix on 0.2.2.2-alpha.
16920 o Minor bugfixes (user interface):
16921 - Display a more accurate number of suppressed messages in the log
16922 rate-limiter. Previously, there was a potential integer overflow
16923 in the counter. Now, if the number of messages hits a maximum, the
16924 rate-limiter doesn't count any further. Fixes bug 19435; bugfix
16926 - Fix a typo in the passphrase prompt for the ed25519 identity key.
16927 Fixes bug 19503; bugfix on 0.2.7.2-alpha.
16929 o Code simplification and refactoring:
16930 - Remove redundant declarations of the MIN macro. Closes
16932 - Rename tor_dup_addr() to tor_addr_to_str_dup() to avoid confusion.
16933 Closes ticket 18462; patch from "icanhasaccount".
16934 - Split the 600-line directory_handle_command_get function into
16935 separate functions for different URL types. Closes ticket 16698.
16938 - Fix spelling of "--enable-tor2web-mode" in the manpage. Closes
16939 ticket 19153. Patch from "U+039b".
16941 o Removed features:
16942 - Remove support for "GET /tor/bytes.txt" DirPort request, and
16943 "GETINFO dir-usage" controller request, which were only available
16944 via a compile-time option in Tor anyway. Feature was added in
16945 0.2.2.1-alpha. Resolves ticket 19035.
16946 - There is no longer a compile-time option to disable support for
16947 TransPort. (If you don't want TransPort; just don't use it.) Patch
16948 from "U+039b". Closes ticket 19449.
16951 - Run more workqueue tests as part of "make check". These had
16952 previously been implemented, but you needed to know special
16953 command-line options to enable them.
16954 - We now have unit tests for our code to reject zlib "compression
16955 bombs". (Fortunately, the code works fine.)
16958 Changes in version 0.2.8.6 - 2016-08-02
16960 Tor 0.2.8.6 is the first stable version of the Tor 0.2.8 series.
16962 The Tor 0.2.8 series improves client bootstrapping performance,
16963 completes the authority-side implementation of improved identity
16964 keys for relays, and includes numerous bugfixes and performance
16965 improvements throughout the program. This release continues to
16966 improve the coverage of Tor's test suite. For a full list of
16967 changes since Tor 0.2.7, see the ReleaseNotes file.
16969 Changes since 0.2.8.5-rc:
16971 o Minor features (geoip):
16972 - Update geoip and geoip6 to the July 6 2016 Maxmind GeoLite2
16975 o Minor bugfixes (compilation):
16976 - Fix a compilation warning in the unit tests on systems where char
16977 is signed. Fixes bug 19682; bugfix on 0.2.8.1-alpha.
16979 o Minor bugfixes (fallback directories):
16980 - Remove 1 fallback that was on the hardcoded list, then opted-out,
16981 leaving 89 of the 100 fallbacks originally introduced in Tor
16982 0.2.8.2-alpha in March 2016. Closes ticket 19782; patch by teor.
16984 o Minor bugfixes (Linux seccomp2 sandbox):
16985 - Allow more syscalls when running with "Sandbox 1" enabled:
16986 sysinfo, getsockopt(SO_SNDBUF), and setsockopt(SO_SNDBUFFORCE). On
16987 some systems, these are required for Tor to start. Fixes bug
16988 18397; bugfix on 0.2.5.1-alpha. Patch from Daniel Pinto.
16989 - Allow IPPROTO_UDP datagram sockets when running with "Sandbox 1",
16990 so that get_interface_address6_via_udp_socket_hack() can work.
16991 Fixes bug 19660; bugfix on 0.2.5.1-alpha.
16994 Changes in version 0.2.8.5-rc - 2016-07-07
16995 Tor 0.2.8.5-rc is the second release candidate in the Tor 0.2.8
16996 series. If we find no new bugs or regressions here, the first stable
16997 0.2.8 release will be identical to it. It has a few small bugfixes
16998 against previous versions.
17000 o Directory authority changes:
17001 - Urras is no longer a directory authority. Closes ticket 19271.
17003 o Major bugfixes (heartbeat):
17004 - Fix a regression that would crash Tor when the periodic
17005 "heartbeat" log messages were disabled. Fixes bug 19454; bugfix on
17006 0.2.8.1-alpha. Reported by "kubaku".
17008 o Minor features (build):
17009 - Tor now again builds with the recent OpenSSL 1.1 development
17010 branch (tested against 1.1.0-pre6-dev). Closes ticket 19499.
17011 - When building manual pages, set the timezone to "UTC", so that the
17012 output is reproducible. Fixes bug 19558; bugfix on 0.2.2.9-alpha.
17013 Patch from intrigeri.
17015 o Minor bugfixes (fallback directory selection):
17016 - Avoid errors during fallback selection if there are no eligible
17017 fallbacks. Fixes bug 19480; bugfix on 0.2.8.3-alpha. Patch
17020 o Minor bugfixes (IPv6, microdescriptors):
17021 - Don't check node addresses when we only have a routerstatus. This
17022 allows IPv6-only clients to bootstrap by fetching microdescriptors
17023 from fallback directory mirrors. (The microdescriptor consensus
17024 has no IPv6 addresses in it.) Fixes bug 19608; bugfix
17027 o Minor bugfixes (logging):
17028 - Reduce pointlessly verbose log messages when directory servers
17029 can't be found. Fixes bug 18849; bugfix on 0.2.8.3-alpha and
17030 0.2.8.1-alpha. Patch by teor.
17031 - When a fallback directory changes its fingerprint from the hard-
17032 coded fingerprint, log a less severe, more explanatory log
17033 message. Fixes bug 18812; bugfix on 0.2.8.1-alpha. Patch by teor.
17035 o Minor bugfixes (Linux seccomp2 sandboxing):
17036 - Allow statistics to be written to disk when "Sandbox 1" is
17037 enabled. Fixes bugs 19556 and 19957; bugfix on 0.2.5.1-alpha and
17038 0.2.6.1-alpha respectively.
17040 o Minor bugfixes (user interface):
17041 - Remove a warning message "Service [scrubbed] not found after
17042 descriptor upload". This message appears when one uses HSPOST
17043 control command to upload a service descriptor. Since there is
17044 only a descriptor and no service, showing this message is
17045 pointless and confusing. Fixes bug 19464; bugfix on 0.2.7.2-alpha.
17047 o Fallback directory list:
17048 - Add a comment to the generated fallback directory list that
17049 explains how to comment out unsuitable fallbacks in a way that's
17050 compatible with the stem fallback parser.
17051 - Update fallback whitelist and blacklist based on relay operator
17052 emails. Blacklist unsuitable (non-working, over-volatile)
17053 fallbacks. Resolves ticket 19071. Patch by teor.
17054 - Remove 10 unsuitable fallbacks, leaving 90 of the 100 fallbacks
17055 originally introduced in Tor 0.2.8.2-alpha in March 2016. Closes
17056 ticket 19071; patch by teor.
17059 Changes in version 0.2.8.4-rc - 2016-06-15
17060 Tor 0.2.8.4-rc is the first release candidate in the Tor 0.2.8 series.
17061 If we find no new bugs or regressions here, the first stable 0.2.8
17062 release will be identical to it. It has a few small bugfixes against
17065 o Major bugfixes (user interface):
17066 - Correctly give a warning in the cases where a relay is specified
17067 by nickname, and one such relay is found, but it is not officially
17068 Named. Fixes bug 19203; bugfix on 0.2.3.1-alpha.
17070 o Minor features (build):
17071 - Tor now builds once again with the recent OpenSSL 1.1 development
17072 branch (tested against 1.1.0-pre5 and 1.1.0-pre6-dev).
17074 o Minor features (geoip):
17075 - Update geoip and geoip6 to the June 7 2016 Maxmind GeoLite2
17078 o Minor bugfixes (compilation):
17079 - Cause the unit tests to compile correctly on mingw64 versions that
17080 lack sscanf. Fixes bug 19213; bugfix on 0.2.7.1-alpha.
17082 o Minor bugfixes (downloading):
17083 - Predict more correctly whether we'll be downloading over HTTP when
17084 we determine the maximum length of a URL. This should avoid a
17085 "BUG" warning about the Squid HTTP proxy and its URL limits. Fixes
17089 Changes in version 0.2.8.3-alpha - 2016-05-26
17090 Tor 0.2.8.3-alpha resolves several bugs, most of them introduced over
17091 the course of the 0.2.8 development cycle. It improves the behavior of
17092 directory clients, fixes several crash bugs, fixes a gap in compiler
17093 hardening, and allows the full integration test suite to run on
17096 o Major bugfixes (security, client, DNS proxy):
17097 - Stop a crash that could occur when a client running with DNSPort
17098 received a query with multiple address types, and the first
17099 address type was not supported. Found and fixed by Scott Dial.
17100 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
17102 o Major bugfixes (security, compilation):
17103 - Correctly detect compiler flags on systems where _FORTIFY_SOURCE
17104 is predefined. Previously, our use of -D_FORTIFY_SOURCE would
17105 cause a compiler warning, thereby making other checks fail, and
17106 needlessly disabling compiler-hardening support. Fixes one case of
17107 bug 18841; bugfix on 0.2.3.17-beta. Patch from "trudokal".
17109 o Major bugfixes (security, directory authorities):
17110 - Fix a crash and out-of-bounds write during authority voting, when
17111 the list of relays includes duplicate ed25519 identity keys. Fixes
17112 bug 19032; bugfix on 0.2.8.2-alpha.
17114 o Major bugfixes (client, bootstrapping):
17115 - Check if bootstrap consensus downloads are still needed when the
17116 linked connection attaches. This prevents tor making unnecessary
17117 begindir-style connections, which are the only directory
17118 connections tor clients make since the fix for 18483 was merged.
17119 - Fix some edge cases where consensus download connections may not
17120 have been closed, even though they were not needed. Related to fix
17122 - Make relays retry consensus downloads the correct number of times,
17123 rather than the more aggressive client retry count. Fixes part of
17125 - Stop downloading consensuses when we have a consensus, even if we
17126 don't have all the certificates for it yet. Fixes bug 18809;
17127 bugfix on 0.2.8.1-alpha. Patches by arma and teor.
17129 o Major bugfixes (directory mirrors):
17130 - Decide whether to advertise begindir support in the the same way
17131 we decide whether to advertise our DirPort. Allowing these
17132 decisions to become out-of-sync led to surprising behavior like
17133 advertising begindir support when hibernation made us not
17134 advertise a DirPort. Resolves bug 18616; bugfix on 0.2.8.1-alpha.
17137 o Major bugfixes (IPv6 bridges, client):
17138 - Actually use IPv6 addresses when selecting directory addresses for
17139 IPv6 bridges. Fixes bug 18921; bugfix on 0.2.8.1-alpha. Patch
17142 o Major bugfixes (key management):
17143 - If OpenSSL fails to generate an RSA key, do not retain a dangling
17144 pointer to the previous (uninitialized) key value. The impact here
17145 should be limited to a difficult-to-trigger crash, if OpenSSL is
17146 running an engine that makes key generation failures possible, or
17147 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
17148 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
17151 o Major bugfixes (testing):
17152 - Fix a bug that would block 'make test-network-all' on systems where
17153 IPv6 packets were lost. Fixes bug 19008; bugfix on 0.2.7.3-rc.
17154 - Avoid "WSANOTINITIALISED" warnings in the unit tests. Fixes bug 18668;
17155 bugfix on 0.2.8.1-alpha.
17157 o Minor features (clients):
17158 - Make clients, onion services, and bridge relays always use an
17159 encrypted begindir connection for directory requests. Resolves
17160 ticket 18483. Patch by "teor".
17162 o Minor features (fallback directory mirrors):
17163 - Give each fallback the same weight for client selection; restrict
17164 fallbacks to one per operator; report fallback directory detail
17165 changes when rebuilding list; add new fallback directory mirrors
17166 to the whitelist; and many other minor simplifications and fixes.
17167 Closes tasks 17905, 18749, bug 18689, and fixes part of bug 18812 on
17168 0.2.8.1-alpha; patch by "teor".
17169 - Replace the 21 fallbacks generated in January 2016 and included in
17170 Tor 0.2.8.1-alpha, with a list of 100 fallbacks generated in March
17171 2016. Closes task 17158; patch by "teor".
17173 o Minor features (geoip):
17174 - Update geoip and geoip6 to the May 4 2016 Maxmind GeoLite2
17177 o Minor bugfixes (assert, portability):
17178 - Fix an assertion failure in memarea.c on systems where "long" is
17179 shorter than the size of a pointer. Fixes bug 18716; bugfix
17182 o Minor bugfixes (bootstrap):
17183 - Consistently use the consensus download schedule for authority
17184 certificates. Fixes bug 18816; bugfix on 0.2.4.13-alpha.
17186 o Minor bugfixes (build):
17187 - Remove a pair of redundant AM_CONDITIONAL declarations from
17188 configure.ac. Fixes one final case of bug 17744; bugfix
17190 - Resolve warnings when building on systems that are concerned with
17191 signed char. Fixes bug 18728; bugfix on 0.2.7.2-alpha
17193 - When libscrypt.h is found, but no libscrypt library can be linked,
17194 treat libscrypt as absent. Fixes bug 19161; bugfix
17197 o Minor bugfixes (client):
17198 - Turn all TestingClientBootstrap* into non-testing torrc options.
17199 This changes simply renames them by removing "Testing" in front of
17200 them and they do not require TestingTorNetwork to be enabled
17201 anymore. Fixes bug 18481; bugfix on 0.2.8.1-alpha.
17202 - Make directory node selection more reliable, mainly for IPv6-only
17203 clients and clients with few reachable addresses. Fixes bug 18929;
17204 bugfix on 0.2.8.1-alpha. Patch by "teor".
17206 o Minor bugfixes (controller, microdescriptors):
17207 - Make GETINFO dir/status-vote/current/consensus conform to the
17208 control specification by returning "551 Could not open cached
17209 consensus..." when not caching consensuses. Fixes bug 18920;
17210 bugfix on 0.2.2.6-alpha.
17212 o Minor bugfixes (crypto, portability):
17213 - The SHA3 and SHAKE routines now produce the correct output on Big
17214 Endian systems. No code calls either algorithm yet, so this is
17215 primarily a build fix. Fixes bug 18943; bugfix on 0.2.8.1-alpha.
17216 - Tor now builds again with the recent OpenSSL 1.1 development
17217 branch (tested against 1.1.0-pre4 and 1.1.0-pre5-dev). Closes
17220 o Minor bugfixes (directories):
17221 - When fetching extrainfo documents, compare their SHA256 digests
17222 and Ed25519 signing key certificates with the routerinfo that led
17223 us to fetch them, rather than with the most recent routerinfo.
17224 Otherwise we generate many spurious warnings about mismatches.
17225 Fixes bug 17150; bugfix on 0.2.7.2-alpha.
17227 o Minor bugfixes (logging):
17228 - When we can't generate a signing key because OfflineMasterKey is
17229 set, do not imply that we should have been able to load it. Fixes
17230 bug 18133; bugfix on 0.2.7.2-alpha.
17231 - Stop periodic_event_dispatch() from blasting twelve lines per
17232 second at loglevel debug. Fixes bug 18729; fix on 0.2.8.1-alpha.
17233 - When rejecting a misformed INTRODUCE2 cell, only log at
17234 PROTOCOL_WARN severity. Fixes bug 18761; bugfix on 0.2.8.2-alpha.
17236 o Minor bugfixes (pluggable transports):
17237 - Avoid reporting a spurious error when we decide that we don't need
17238 to terminate a pluggable transport because it has already exited.
17239 Fixes bug 18686; bugfix on 0.2.5.5-alpha.
17241 o Minor bugfixes (pointer arithmetic):
17242 - Fix a bug in memarea_alloc() that could have resulted in remote
17243 heap write access, if Tor had ever passed an unchecked size to
17244 memarea_alloc(). Fortunately, all the sizes we pass to
17245 memarea_alloc() are pre-checked to be less than 128 kilobytes.
17246 Fixes bug 19150; bugfix on 0.2.1.1-alpha. Bug found by
17249 o Minor bugfixes (relays):
17250 - Consider more config options when relays decide whether to
17251 regenerate their descriptor. Fixes more of bug 12538; bugfix
17253 - Resolve some edge cases where we might launch an ORPort
17254 reachability check even when DisableNetwork is set. Noticed while
17255 fixing bug 18616; bugfix on 0.2.3.9-alpha.
17257 o Minor bugfixes (statistics):
17258 - We now include consensus downloads via IPv6 in our directory-
17259 request statistics. Fixes bug 18460; bugfix on 0.2.3.14-alpha.
17261 o Minor bugfixes (testing):
17262 - Allow directories in small networks to bootstrap by skipping
17263 DirPort checks when the consensus has no exits. Fixes bug 19003;
17264 bugfix on 0.2.8.1-alpha. Patch by teor.
17265 - Fix a small memory leak that would occur when the
17266 TestingEnableCellStatsEvent option was turned on. Fixes bug 18673;
17267 bugfix on 0.2.5.2-alpha.
17269 o Minor bugfixes (time handling):
17270 - When correcting a corrupt 'struct tm' value, fill in the tm_wday
17271 field. Otherwise, our unit tests crash on Windows. Fixes bug
17272 18977; bugfix on 0.2.2.25-alpha.
17275 - Document the contents of the 'datadir/keys' subdirectory in the
17276 manual page. Closes ticket 17621.
17277 - Stop recommending use of nicknames to identify relays in our
17278 MapAddress documentation. Closes ticket 18312.
17281 Changes in version 0.2.8.2-alpha - 2016-03-28
17282 Tor 0.2.8.2-alpha is the second alpha in its series. It fixes numerous
17283 bugs in earlier versions of Tor, including some that prevented
17284 authorities using Tor 0.2.7.x from running correctly. IPv6 and
17285 directory support should also be much improved.
17287 o New system requirements:
17288 - Tor no longer supports versions of OpenSSL with a broken
17289 implementation of counter mode. (This bug was present in OpenSSL
17290 1.0.0, and was fixed in OpenSSL 1.0.0a.) Tor still detects, but no
17291 longer runs with, these versions.
17292 - Tor no longer attempts to support platforms where the "time_t"
17293 type is unsigned. (To the best of our knowledge, only OpenVMS does
17294 this, and Tor has never actually built on OpenVMS.) Closes
17296 - Tor now uses Autoconf version 2.63 or later, and Automake 1.11 or
17297 later (released in 2008 and 2009 respectively). If you are
17298 building Tor from the git repository instead of from the source
17299 distribution, and your tools are older than this, you will need to
17300 upgrade. Closes ticket 17732.
17302 o Major bugfixes (security, pointers):
17303 - Avoid a difficult-to-trigger heap corruption attack when extending
17304 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
17305 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
17306 Reported by Guido Vranken.
17308 o Major bugfixes (bridges, pluggable transports):
17309 - Modify the check for OR connections to private addresses. Allow
17310 bridges on private addresses, including pluggable transports that
17311 ignore the (potentially private) address in the bridge line. Fixes
17312 bug 18517; bugfix on 0.2.8.1-alpha. Reported by gk, patch by teor.
17314 o Major bugfixes (compilation):
17315 - Repair hardened builds under the clang compiler. Previously, our
17316 use of _FORTIFY_SOURCE would conflict with clang's address
17317 sanitizer. Fixes bug 14821; bugfix on 0.2.5.4-alpha.
17319 o Major bugfixes (crash on shutdown):
17320 - Correctly handle detaching circuits from muxes when shutting down.
17321 Fixes bug 18116; bugfix on 0.2.8.1-alpha.
17322 - Fix an assert-on-exit bug related to counting memory usage in
17323 rephist.c. Fixes bug 18651; bugfix on 0.2.8.1-alpha.
17325 o Major bugfixes (crash on startup):
17326 - Fix a segfault during startup: If a Unix domain socket was
17327 configured as listener (such as a ControlSocket or a SocksPort
17328 "unix:" socket), and tor was started as root but not configured to
17329 switch to another user, tor would segfault while trying to string
17330 compare a NULL value. Fixes bug 18261; bugfix on 0.2.8.1-alpha.
17333 o Major bugfixes (dns proxy mode, crash):
17334 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
17335 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
17337 o Major bugfixes (relays, bridge clients):
17338 - Ensure relays always allow IPv4 OR and Dir connections. Ensure
17339 bridge clients use the address configured in the bridge line.
17340 Fixes bug 18348; bugfix on 0.2.8.1-alpha. Reported by sysrqb,
17343 o Major bugfixes (voting):
17344 - Actually enable support for authorities to match routers by their
17345 Ed25519 identities. Previously, the code had been written, but
17346 some debugging code that had accidentally been left in the
17347 codebase made it stay turned off. Fixes bug 17702; bugfix
17349 - When collating votes by Ed25519 identities, authorities now
17350 include a "NoEdConsensus" flag if the ed25519 value (or lack
17351 thereof) for a server does not reflect the majority consensus.
17352 Related to bug 17668; bugfix on 0.2.7.2-alpha.
17353 - When generating a vote with keypinning disabled, never include two
17354 entries for the same ed25519 identity. This bug was causing
17355 authorities to generate votes that they could not parse when a
17356 router violated key pinning by changing its RSA identity but
17357 keeping its Ed25519 identity. Fixes bug 17668; fixes part of bug
17358 18318. Bugfix on 0.2.7.2-alpha.
17360 o Minor features (security, win32):
17361 - Set SO_EXCLUSIVEADDRUSE on Win32 to avoid a local port-stealing
17362 attack. Fixes bug 18123; bugfix on all tor versions. Patch
17365 o Minor features (bug-resistance):
17366 - Make Tor survive errors involving connections without a
17367 corresponding event object. Previously we'd fail with an
17368 assertion; now we produce a log message. Related to bug 16248.
17370 o Minor features (build):
17371 - Detect systems with FreeBSD-derived kernels (such as GNU/kFreeBSD)
17372 as having possible IPFW support. Closes ticket 18448. Patch from
17373 Steven Chamberlain.
17375 o Minor features (code hardening):
17376 - Use tor_snprintf() and tor_vsnprintf() even in external and low-
17377 level code, to harden against accidental failures to NUL-
17378 terminate. Part of ticket 17852. Patch from jsturgix. Found
17381 o Minor features (crypto):
17382 - Validate the hard-coded Diffie-Hellman parameters and ensure that
17383 p is a safe prime, and g is a suitable generator. Closes
17386 o Minor features (geoip):
17387 - Update geoip and geoip6 to the March 3 2016 Maxmind GeoLite2
17390 o Minor features (hidden service directory):
17391 - Streamline relay-side hsdir handling: when relays consider whether
17392 to accept an uploaded hidden service descriptor, they no longer
17393 check whether they are one of the relays in the network that is
17394 "supposed" to handle that descriptor. Implements ticket 18332.
17396 o Minor features (IPv6):
17397 - Add ClientPreferIPv6DirPort, which is set to 0 by default. If set
17398 to 1, tor prefers IPv6 directory addresses.
17399 - Add ClientUseIPv4, which is set to 1 by default. If set to 0, tor
17400 avoids using IPv4 for client OR and directory connections.
17401 - Try harder to obey the IP version restrictions "ClientUseIPv4 0",
17402 "ClientUseIPv6 0", "ClientPreferIPv6ORPort", and
17403 "ClientPreferIPv6DirPort". Closes ticket 17840; patch by teor.
17405 o Minor features (linux seccomp2 sandbox):
17406 - Reject attempts to change our Address with "Sandbox 1" enabled.
17407 Changing Address with Sandbox turned on would never actually work,
17408 but previously it would fail in strange and confusing ways. Found
17409 while fixing 18548.
17411 o Minor features (robustness):
17412 - Exit immediately with an error message if the code attempts to use
17413 Libevent without having initialized it. This should resolve some
17414 frequently-made mistakes in our unit tests. Closes ticket 18241.
17416 o Minor features (unix domain sockets):
17417 - Add a new per-socket option, RelaxDirModeCheck, to allow creating
17418 Unix domain sockets without checking the permissions on the parent
17419 directory. (Tor checks permissions by default because some
17420 operating systems only check permissions on the parent directory.
17421 However, some operating systems do look at permissions on the
17422 socket, and tor's default check is unneeded.) Closes ticket 18458.
17425 o Minor bugfixes (exit policies, security):
17426 - Refresh an exit relay's exit policy when interface addresses
17427 change. Previously, tor only refreshed the exit policy when the
17428 configured external address changed. Fixes bug 18208; bugfix on
17429 0.2.7.3-rc. Patch by teor.
17431 o Minor bugfixes (security, hidden services):
17432 - Prevent hidden services connecting to client-supplied rendezvous
17433 addresses that are reserved as internal or multicast. Fixes bug
17434 8976; bugfix on 0.2.3.21-rc. Patch by dgoulet and teor.
17436 o Minor bugfixes (build):
17437 - Do not link the unit tests against both the testing and non-
17438 testing versions of the static libraries. Fixes bug 18490; bugfix
17440 - Avoid spurious failures from configure files related to calling
17441 exit(0) in TOR_SEARCH_LIBRARY. Fixes bug 18626; bugfix on
17442 0.2.0.1-alpha. Patch from "cypherpunks".
17443 - Silence spurious clang-scan warnings in the ed25519_donna code by
17444 explicitly initializing some objects. Fixes bug 18384; bugfix on
17445 0.2.7.2-alpha. Patch by teor.
17447 o Minor bugfixes (client, bootstrap):
17448 - Count receipt of new microdescriptors as progress towards
17449 bootstrapping. Previously, with EntryNodes set, Tor might not
17450 successfully repopulate the guard set on bootstrapping. Fixes bug
17451 16825; bugfix on 0.2.3.1-alpha.
17453 o Minor bugfixes (code correctness):
17454 - Update to the latest version of Trunnel, which tries harder to
17455 avoid generating code that can invoke memcpy(p,NULL,0). Bug found
17456 by clang address sanitizer. Fixes bug 18373; bugfix
17459 o Minor bugfixes (configuration):
17460 - Fix a tiny memory leak when parsing a port configuration ending in
17461 ":auto". Fixes bug 18374; bugfix on 0.2.3.3-alpha.
17463 o Minor bugfixes (containers):
17464 - If we somehow attempt to construct a heap with more than
17465 1073741822 elements, avoid an integer overflow when maintaining
17466 the heap property. Fixes bug 18296; bugfix on 0.1.2.1-alpha.
17468 o Minor bugfixes (correctness):
17469 - Fix a bad memory handling bug that would occur if we had queued a
17470 cell on a channel's incoming queue. Fortunately, we can't actually
17471 queue a cell like that as our code is constructed today, but it's
17472 best to avoid this kind of error, even if there isn't any code
17473 that triggers it today. Fixes bug 18570; bugfix on 0.2.4.4-alpha.
17475 o Minor bugfixes (directory):
17476 - When generating a URL for a directory server on an IPv6 address,
17477 wrap the IPv6 address in square brackets. Fixes bug 18051; bugfix
17478 on 0.2.3.9-alpha. Patch from Malek.
17480 o Minor bugfixes (fallback directory mirrors):
17481 - When requesting extrainfo descriptors from a trusted directory
17482 server, check whether it is an authority or a fallback directory
17483 which supports extrainfo descriptors. Fixes bug 18489; bugfix on
17484 0.2.4.7-alpha. Reported by atagar, patch by teor.
17486 o Minor bugfixes (hidden service, client):
17487 - Handle the case where the user makes several fast consecutive
17488 requests to the same .onion address. Previously, the first six
17489 requests would each trigger a descriptor fetch, each picking a
17490 directory (there are 6 overall) and the seventh one would fail
17491 because no directories were left, thereby triggering a close on
17492 all current directory connections asking for the hidden service.
17493 The solution here is to not close the connections if we have
17494 pending directory fetches. Fixes bug 15937; bugfix
17497 o Minor bugfixes (hidden service, control port):
17498 - Add the onion address to the HS_DESC event for the UPLOADED action
17499 both on success or failure. It was previously hardcoded with
17500 UNKNOWN. Fixes bug 16023; bugfix on 0.2.7.2-alpha.
17502 o Minor bugfixes (hidden service, directory):
17503 - Bridges now refuse "rendezvous2" (hidden service descriptor)
17504 publish attempts. Suggested by ticket 18332.
17506 o Minor bugfixes (linux seccomp2 sandbox):
17507 - Allow the setrlimit syscall, and the prlimit and prlimit64
17508 syscalls, which some libc implementations use under the hood.
17509 Fixes bug 15221; bugfix on 0.2.5.1-alpha.
17510 - Avoid a 10-second delay when starting as a client with "Sandbox 1"
17511 enabled and no DNS resolvers configured. This should help TAILS
17512 start up faster. Fixes bug 18548; bugfix on 0.2.5.1-alpha.
17513 - Fix the sandbox's interoperability with unix domain sockets under
17514 setuid. Fixes bug 18253; bugfix on 0.2.8.1-alpha.
17516 o Minor bugfixes (logging):
17517 - When logging information about an unparsable networkstatus vote or
17518 consensus, do not say "vote" when we mean consensus. Fixes bug
17519 18368; bugfix on 0.2.0.8-alpha.
17520 - Scrub service name in "unrecognized service ID" log messages.
17521 Fixes bug 18600; bugfix on 0.2.4.11-alpha.
17522 - Downgrade logs and backtraces about IP versions to info-level.
17523 Only log backtraces once each time tor runs. Assists in diagnosing
17524 bug 18351; bugfix on 0.2.8.1-alpha. Reported by sysrqb and
17525 Christian, patch by teor.
17527 o Minor bugfixes (memory safety):
17528 - Avoid freeing an uninitialized pointer when opening a socket fails
17529 in get_interface_addresses_ioctl(). Fixes bug 18454; bugfix on
17530 0.2.3.11-alpha. Reported by toralf and "cypherpunks", patch
17532 - Correctly duplicate addresses in get_interface_address6_list().
17533 Fixes bug 18454; bugfix on 0.2.8.1-alpha. Reported by toralf,
17534 patch by "cypherpunks".
17535 - Fix a memory leak in tor-gencert. Fixes part of bug 18672; bugfix
17537 - Fix a memory leak in "tor --list-fingerprint". Fixes part of bug
17538 18672; bugfix on 0.2.5.1-alpha.
17540 o Minor bugfixes (private directory):
17541 - Prevent a race condition when creating private directories. Fixes
17542 part of bug 17852; bugfix on 0.0.2pre13. Part of ticket 17852.
17543 Patch from jsturgix. Found with Flawfinder.
17545 o Minor bugfixes (test networks, IPv6):
17546 - Allow internal IPv6 addresses in descriptors in test networks.
17547 Fixes bug 17153; bugfix on 0.2.3.16-alpha. Patch by teor, reported
17550 o Minor bugfixes (testing):
17551 - We no longer disable assertions in the unit tests when coverage is
17552 enabled. Instead, we require you to say --disable-asserts-in-tests
17553 to the configure script if you need assertions disabled in the
17554 unit tests (for example, if you want to perform branch coverage).
17555 Fixes bug 18242; bugfix on 0.2.7.1-alpha.
17557 o Minor bugfixes (time parsing):
17558 - Avoid overflow in tor_timegm when parsing dates in and after 2038
17559 on platforms with 32-bit time_t. Fixes bug 18479; bugfix on
17560 0.0.2pre14. Patch by teor.
17562 o Minor bugfixes (tor-gencert):
17563 - Correctly handle the case where an authority operator enters a
17564 passphrase but sends an EOF before sending a newline. Fixes bug
17565 17443; bugfix on 0.2.0.20-rc. Found by junglefowl.
17567 o Code simplification and refactoring:
17568 - Quote all the string interpolations in configure.ac -- even those
17569 which we are pretty sure can't contain spaces. Closes ticket
17570 17744. Patch from zerosion.
17571 - Remove specialized code for non-inplace AES_CTR. 99% of our AES is
17572 inplace, so there's no need to have a separate implementation for
17573 the non-inplace code. Closes ticket 18258. Patch from Malek.
17574 - Simplify return types for some crypto functions that can't
17575 actually fail. Patch from Hassan Alsibyani. Closes ticket 18259.
17578 - Change build messages to refer to "Fedora" instead of "Fedora
17579 Core", and "dnf" instead of "yum". Closes tickets 18459 and 18426.
17580 Patches from "icanhasaccount" and "cypherpunks".
17582 o Removed features:
17583 - We no longer maintain an internal freelist in memarea.c.
17584 Allocators should be good enough to make this code unnecessary,
17585 and it's doubtful that it ever had any performance benefit.
17588 - Fix several warnings from clang's address sanitizer produced in
17590 - Treat backtrace test failures as expected on FreeBSD until we
17591 solve bug 17808. Closes ticket 18204.
17594 Changes in version 0.2.8.1-alpha - 2016-02-04
17595 Tor 0.2.8.1-alpha is the first alpha release in its series. It
17596 includes numerous small features and bugfixes against previous Tor
17597 versions, and numerous small infrastructure improvements. The most
17598 notable features are a set of improvements to the directory subsystem.
17600 o Major features (security, Linux):
17601 - When Tor starts as root on Linux and is told to switch user ID, it
17602 can now retain the capability to bind to low ports. By default,
17603 Tor will do this only when it's switching user ID and some low
17604 ports have been configured. You can change this behavior with the
17605 new option KeepBindCapabilities. Closes ticket 8195.
17607 o Major features (directory system):
17608 - When bootstrapping multiple consensus downloads at a time, use the
17609 first one that starts downloading, and close the rest. This
17610 reduces failures when authorities or fallback directories are slow
17611 or down. Together with the code for feature 15775, this feature
17612 should reduces failures due to fallback churn. Implements ticket
17613 4483. Patch by "teor". Implements IPv4 portions of proposal 210 by
17614 "mikeperry" and "teor".
17615 - Include a trial list of 21 default fallback directories, generated
17616 in January 2016, based on an opt-in survey of suitable relays.
17617 Doing this should make clients bootstrap more quickly and reliably,
17618 and reduce the load on the directory authorities. Closes ticket
17619 15775. Patch by "teor".
17620 Candidates identified using an OnionOO script by "weasel", "teor",
17621 "gsathya", and "karsten".
17622 - Previously only relays that explicitly opened a directory port
17623 (DirPort) accepted directory requests from clients. Now all
17624 relays, with and without a DirPort, accept and serve tunneled
17625 directory requests that they receive through their ORPort. You can
17626 disable this behavior using the new DirCache option. Closes
17629 o Major key updates:
17630 - Update the V3 identity key for the dannenberg directory authority:
17631 it was changed on 18 November 2015. Closes task 17906. Patch
17634 o Minor features (security, clock):
17635 - Warn when the system clock appears to move back in time (when the
17636 state file was last written in the future). Tor doesn't know that
17637 consensuses have expired if the clock is in the past. Patch by
17638 "teor". Implements ticket 17188.
17640 o Minor features (security, exit policies):
17641 - ExitPolicyRejectPrivate now rejects more private addresses by
17642 default. Specifically, it now rejects the relay's outbound bind
17643 addresses (if configured), and the relay's configured port
17644 addresses (such as ORPort and DirPort). Fixes bug 17027; bugfix on
17645 0.2.0.11-alpha. Patch by "teor".
17647 o Minor features (security, memory erasure):
17648 - Set the unused entries in a smartlist to NULL. This helped catch
17649 a (harmless) bug, and shouldn't affect performance too much.
17650 Implements ticket 17026.
17651 - Use SecureMemoryWipe() function to securely clean memory on
17652 Windows. Previously we'd use OpenSSL's OPENSSL_cleanse() function.
17653 Implements feature 17986.
17654 - Use explicit_bzero or memset_s when present. Previously, we'd use
17655 OpenSSL's OPENSSL_cleanse() function. Closes ticket 7419; patches
17656 from <logan@hackers.mu> and <selven@hackers.mu>.
17657 - Make memwipe() do nothing when passed a NULL pointer or buffer of
17658 zero size. Check size argument to memwipe() for underflow. Fixes
17659 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
17662 o Minor features (security, RNG):
17663 - Adjust Tor's use of OpenSSL's RNG APIs so that they absolutely,
17664 positively are not allowed to fail. Previously we depended on
17665 internal details of OpenSSL's behavior. Closes ticket 17686.
17666 - Never use the system entropy output directly for anything besides
17667 seeding the PRNG. When we want to generate important keys, instead
17668 of using system entropy directly, we now hash it with the PRNG
17669 stream. This may help resist certain attacks based on broken OS
17670 entropy implementations. Closes part of ticket 17694.
17671 - Use modern system calls (like getentropy() or getrandom()) to
17672 generate strong entropy on platforms that have them. Closes
17675 o Minor features (accounting):
17676 - Added two modes to the AccountingRule option: One for limiting
17677 only the number of bytes sent ("AccountingRule out"), and one for
17678 limiting only the number of bytes received ("AccountingRule in").
17679 Closes ticket 15989; patch from "unixninja92".
17681 o Minor features (build):
17682 - Since our build process now uses "make distcheck", we no longer
17683 force "make dist" to depend on "make check". Closes ticket 17893;
17684 patch from "cypherpunks."
17685 - Tor now builds successfully with the recent OpenSSL 1.1
17686 development branch, and with the latest LibreSSL. Closes tickets
17687 17549, 17921, and 17984.
17689 o Minor features (controller):
17690 - Adds the FallbackDir entries to 'GETINFO config/defaults'. Closes
17691 tickets 16774 and 17817. Patch by George Tankersley.
17692 - New 'GETINFO hs/service/desc/id/' command to retrieve a hidden
17693 service descriptor from a service's local hidden service
17694 descriptor cache. Closes ticket 14846.
17695 - Add 'GETINFO exit-policy/reject-private/[default,relay]', so
17696 controllers can examine the the reject rules added by
17697 ExitPolicyRejectPrivate. This makes it easier for stem to display
17700 o Minor features (crypto):
17701 - Add SHA512 support to crypto.c. Closes ticket 17663; patch from
17703 - Add SHA3 and SHAKE support to crypto.c. Closes ticket 17783.
17704 - When allocating a digest state object, allocate no more space than
17705 we actually need. Previously, we would allocate as much space as
17706 the state for the largest algorithm would need. This change saves
17707 up to 672 bytes per circuit. Closes ticket 17796.
17708 - Improve performance when hashing non-multiple of 8 sized buffers,
17709 based on Andrew Moon's public domain SipHash-2-4 implementation.
17710 Fixes bug 17544; bugfix on 0.2.5.3-alpha.
17712 o Minor features (directory downloads):
17713 - Wait for busy authorities and fallback directories to become non-
17714 busy when bootstrapping. (A similar change was made in 6c443e987d
17715 for directory caches chosen from the consensus.) Closes ticket
17716 17864; patch by "teor".
17717 - Add UseDefaultFallbackDirs, which enables any hard-coded fallback
17718 directory mirrors. The default is 1; set it to 0 to disable
17719 fallbacks. Implements ticket 17576. Patch by "teor".
17721 o Minor features (geoip):
17722 - Update geoip and geoip6 to the January 5 2016 Maxmind GeoLite2
17725 o Minor features (IPv6):
17726 - Add an argument 'ipv6=address:orport' to the DirAuthority and
17727 FallbackDir torrc options, to specify an IPv6 address for an
17728 authority or fallback directory. Add hard-coded ipv6 addresses for
17729 directory authorities that have them. Closes ticket 17327; patch
17730 from Nick Mathewson and "teor".
17731 - Add address policy assume_action support for IPv6 addresses.
17732 - Limit IPv6 mask bits to 128.
17733 - Warn when comparing against an AF_UNSPEC address in a policy, it's
17734 almost always a bug. Closes ticket 17863; patch by "teor".
17735 - Allow users to configure directory authorities and fallback
17736 directory servers with IPv6 addresses and ORPorts. Resolves
17738 - routerset_parse now accepts IPv6 literal addresses. Fixes bug
17739 17060; bugfix on 0.2.1.3-alpha. Patch by "teor".
17740 - Make tor_ersatz_socketpair work on IPv6-only systems. Fixes bug
17741 17638; bugfix on 0.0.2pre8. Patch by "teor".
17743 o Minor features (logging):
17744 - When logging to syslog, allow a tag to be added to the syslog
17745 identity (the string prepended to every log message). The tag can
17746 be configured with SyslogIdentityTag and defaults to none. Setting
17747 it to "foo" will cause logs to be tagged as "Tor-foo". Closes
17750 o Minor features (portability):
17751 - Use timingsafe_memcmp() where available. Closes ticket 17944;
17752 patch from <logan@hackers.mu>.
17754 o Minor features (relay, address discovery):
17755 - Add a family argument to get_interface_addresses_raw() and
17756 subfunctions to make network interface address interogation more
17757 efficient. Now Tor can specifically ask for IPv4, IPv6 or both
17758 types of interfaces from the operating system. Resolves
17760 - When get_interface_address6_list(.,AF_UNSPEC,.) is called and
17761 fails to enumerate interface addresses using the platform-specific
17762 API, have it rely on the UDP socket fallback technique to try and
17763 find out what IP addresses (both IPv4 and IPv6) our machine has.
17764 Resolves ticket 17951.
17766 o Minor features (replay cache):
17767 - The replay cache now uses SHA256 instead of SHA1. Implements
17768 feature 8961. Patch by "teor", issue reported by "rransom".
17770 o Minor features (unix file permissions):
17771 - Defer creation of Unix sockets until after setuid. This avoids
17772 needing CAP_CHOWN and CAP_FOWNER when using systemd's
17773 CapabilityBoundingSet, or chown and fowner when using SELinux.
17774 Implements part of ticket 17562. Patch from Jamie Nguyen.
17775 - If any directory created by Tor is marked as group readable, the
17776 filesystem group is allowed to be either the default GID or the
17777 root user. Allowing root to read the DataDirectory prevents the
17778 need for CAP_READ_SEARCH when using systemd's
17779 CapabilityBoundingSet, or dac_read_search when using SELinux.
17780 Implements part of ticket 17562. Patch from Jamie Nguyen.
17781 - Introduce a new DataDirectoryGroupReadable option. If it is set to
17782 1, the DataDirectory will be made readable by the default GID.
17783 Implements part of ticket 17562. Patch from Jamie Nguyen.
17785 o Minor bugfixes (accounting):
17786 - The max bandwidth when using 'AccountRule sum' is now correctly
17787 logged. Fixes bug 18024; bugfix on 0.2.6.1-alpha. Patch
17788 from "unixninja92".
17790 o Minor bugfixes (code correctness):
17791 - When closing an entry connection, generate a warning if we should
17792 have sent an end cell for it but we haven't. Fixes bug 17876;
17793 bugfix on 0.2.3.2-alpha.
17794 - Assert that allocated memory held by the reputation code is freed
17795 according to its internal counters. Fixes bug 17753; bugfix
17797 - Assert when the TLS contexts fail to initialize. Fixes bug 17683;
17800 o Minor bugfixes (compilation):
17801 - Mark all object files that include micro-revision.i as depending
17802 on it, so as to make parallel builds more reliable. Fixes bug
17803 17826; bugfix on 0.2.5.1-alpha.
17804 - Don't try to use the pthread_condattr_setclock() function unless
17805 it actually exists. Fixes compilation on NetBSD-6.x. Fixes bug
17806 17819; bugfix on 0.2.6.3-alpha.
17807 - Fix backtrace compilation on FreeBSD. Fixes bug 17827; bugfix
17809 - Fix compilation of sandbox.c with musl-libc. Fixes bug 17347;
17810 bugfix on 0.2.5.1-alpha. Patch from 'jamestk'.
17811 - Fix search for libevent libraries on OpenBSD (and other systems
17812 that install libevent 1 and libevent 2 in parallel). Fixes bug
17813 16651; bugfix on 0.1.0.7-rc. Patch from "rubiate".
17814 - Isolate environment variables meant for tests from the rest of the
17815 build system. Fixes bug 17818; bugfix on 0.2.7.3-rc.
17816 - Replace usage of 'INLINE' with 'inline'. Fixes bug 17804; bugfix
17818 - Remove config.log only from make distclean, not from make clean.
17819 Fixes bug 17924; bugfix on 0.2.4.1-alpha.
17821 o Minor bugfixes (crypto):
17822 - Check the return value of HMAC() and assert on failure. Fixes bug
17823 17658; bugfix on 0.2.3.6-alpha. Patch by "teor".
17825 o Minor bugfixes (fallback directories):
17826 - Mark fallbacks as "too busy" when they return a 503 response,
17827 rather than just marking authorities. Fixes bug 17572; bugfix on
17828 0.2.4.7-alpha. Patch by "teor".
17830 o Minor bugfixes (IPv6):
17831 - Update the limits in max_dl_per_request for IPv6 address length.
17832 Fixes bug 17573; bugfix on 0.2.1.5-alpha.
17834 o Minor bugfixes (linux seccomp2 sandbox):
17835 - Fix a crash when using offline master ed25519 keys with the Linux
17836 seccomp2 sandbox enabled. Fixes bug 17675; bugfix on 0.2.7.3-rc.
17838 o Minor bugfixes (logging):
17839 - In log messages that include a function name, use __FUNCTION__
17840 instead of __PRETTY_FUNCTION__. In GCC, these are synonymous, but
17841 with clang __PRETTY_FUNCTION__ has extra information we don't
17842 need. Fixes bug 16563; bugfix on 0.0.2pre8. Fix by Tom van
17844 - Remove needless quotes from a log message about unparseable
17845 addresses. Fixes bug 17843; bugfix on 0.2.3.3-alpha.
17847 o Minor bugfixes (portability):
17848 - Remove an #endif from configure.ac so that we correctly detect the
17849 presence of in6_addr.s6_addr32. Fixes bug 17923; bugfix
17852 o Minor bugfixes (relays):
17853 - Check that both the ORPort and DirPort (if present) are reachable
17854 before publishing a relay descriptor. Otherwise, relays publish a
17855 descriptor with DirPort 0 when the DirPort reachability test takes
17856 longer than the ORPort reachability test. Fixes bug 18050; bugfix
17857 on 0.1.0.1-rc. Reported by "starlight", patch by "teor".
17859 o Minor bugfixes (relays, hidden services):
17860 - Refuse connection requests to private OR addresses unless
17861 ExtendAllowPrivateAddresses is set. Previously, tor would connect,
17862 then refuse to send any cells to a private address. Fixes bugs
17863 17674 and 8976; bugfix on 0.2.3.21-rc. Patch by "teor".
17865 o Minor bugfixes (safe logging):
17866 - When logging a malformed hostname received through socks4, scrub
17867 it if SafeLogging says we should. Fixes bug 17419; bugfix
17870 o Minor bugfixes (statistics code):
17871 - Consistently check for overflow in round_*_to_next_multiple_of
17872 functions, and add unit tests with additional and maximal values.
17873 Fixes part of bug 13192; bugfix on 0.2.2.1-alpha.
17874 - Handle edge cases in the laplace functions: avoid division by
17875 zero, avoid taking the log of zero, and silence clang type
17876 conversion warnings using round and trunc. Add unit tests for edge
17877 cases with maximal values. Fixes part of bug 13192; bugfix
17880 o Minor bugfixes (testing):
17881 - The test for log_heartbeat was incorrectly failing in timezones
17882 with non-integer offsets. Instead of comparing the end of the time
17883 string against a constant, compare it to the output of
17884 format_local_iso_time when given the correct input. Fixes bug
17885 18039; bugfix on 0.2.5.4-alpha.
17886 - Make unit tests pass on IPv6-only systems, and systems without
17887 localhost addresses (like some FreeBSD jails). Fixes bug 17632;
17888 bugfix on 0.2.7.3-rc. Patch by "teor".
17889 - Fix a memory leak in the ntor test. Fixes bug 17778; bugfix
17891 - Check the full results of SHA256 and SHA512 digests in the unit
17892 tests. Bugfix on 0.2.2.4-alpha. Patch by "teor".
17894 o Code simplification and refactoring:
17895 - Move logging of redundant policy entries in
17896 policies_parse_exit_policy_internal into its own function. Closes
17897 ticket 17608; patch from "juce".
17898 - Extract the more complicated parts of circuit_mark_for_close()
17899 into a new function that we run periodically before circuits are
17900 freed. This change removes more than half of the functions
17901 currently in the "blob". Closes ticket 17218.
17902 - Clean up a little duplicated code in
17903 crypto_expand_key_material_TAP(). Closes ticket 17587; patch
17905 - Decouple the list of streams waiting to be attached to circuits
17906 from the overall connection list. This change makes it possible to
17907 attach streams quickly while simplifying Tor's callgraph and
17908 avoiding O(N) scans of the entire connection list. Closes
17910 - When a direct directory request fails immediately on launch,
17911 instead of relaunching that request from inside the code that
17912 launches it, instead mark the connection for teardown. This change
17913 simplifies Tor's callback and prevents the directory-request
17914 launching code from invoking itself recursively. Closes
17916 - Remove code for configuring OpenSSL dynamic locks; OpenSSL doesn't
17917 use them. Closes ticket 17926.
17920 - Add a description of the correct use of the '--keygen' command-
17921 line option. Closes ticket 17583; based on text by 's7r'.
17922 - Document the minimum HeartbeatPeriod value. Closes ticket 15638.
17923 - Explain actual minima for BandwidthRate. Closes ticket 16382.
17924 - Fix a minor formatting typo in the manpage. Closes ticket 17791.
17925 - Mention torspec URL in the manpage and point the reader to it
17926 whenever we mention a document that belongs in torspce. Fixes
17929 o Removed features:
17930 - Remove client-side support for connecting to Tor relays running
17931 versions of Tor before 0.2.3.6-alpha. These relays didn't support
17932 the v3 TLS handshake protocol, and are no longer allowed on the
17933 Tor network. Implements the client side of ticket 11150. Based on
17934 patches by Tom van der Woerdt.
17937 - Add unit tests to check for common RNG failure modes, such as
17938 returning all zeroes, identical values, or incrementing values
17939 (OpenSSL's rand_predictable feature). Patch by "teor".
17940 - Log more information when the backtrace tests fail. Closes ticket
17941 17892. Patch from "cypherpunks."
17942 - Always test both ed25519 backends, so that we can be sure that our
17943 batch-open replacement code works. Part of ticket 16794.
17944 - Cover dns_resolve_impl() in dns.c with unit tests. Implements a
17945 portion of ticket 16831.
17946 - More unit tests for compat_libevent.c, procmon.c, tortls.c,
17947 util_format.c, directory.c, and options_validate.c. Closes tickets
17948 17075, 17082, 17084, 17003, and 17076 respectively. Patches from
17950 - Unit tests for directory_handle_command_get. Closes ticket 17004.
17951 Patch from Reinaldo de Souza Jr.
17954 Changes in version 0.2.7.6 - 2015-12-10
17955 Tor version 0.2.7.6 fixes a major bug in entry guard selection, as
17956 well as a minor bug in hidden service reliability.
17958 o Major bugfixes (guard selection):
17959 - Actually look at the Guard flag when selecting a new directory
17960 guard. When we implemented the directory guard design, we
17961 accidentally started treating all relays as if they have the Guard
17962 flag during guard selection, leading to weaker anonymity and worse
17963 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
17966 o Minor features (geoip):
17967 - Update geoip and geoip6 to the December 1 2015 Maxmind GeoLite2
17970 o Minor bugfixes (compilation):
17971 - When checking for net/pfvar.h, include netinet/in.h if possible.
17972 This fixes transparent proxy detection on OpenBSD. Fixes bug
17973 17551; bugfix on 0.1.2.1-alpha. Patch from "rubiate".
17974 - Fix a compilation warning with Clang 3.6: Do not check the
17975 presence of an address which can never be NULL. Fixes bug 17781.
17977 o Minor bugfixes (correctness):
17978 - When displaying an IPv6 exit policy, include the mask bits
17979 correctly even when the number is greater than 31. Fixes bug
17980 16056; bugfix on 0.2.4.7-alpha. Patch from "gturner".
17981 - The wrong list was used when looking up expired intro points in a
17982 rend service object, causing what we think could be reachability
17983 issues for hidden services, and triggering a BUG log. Fixes bug
17984 16702; bugfix on 0.2.7.2-alpha.
17985 - Fix undefined behavior in the tor_cert_checksig function. Fixes
17986 bug 17722; bugfix on 0.2.7.2-alpha.
17989 Changes in version 0.2.7.5 - 2015-11-20
17990 The Tor 0.2.7 release series is dedicated to the memory of Tor user
17991 and privacy advocate Caspar Bowden (1961-2015). Caspar worked
17992 tirelessly to advocate human rights regardless of national borders,
17993 and oppose the encroachments of mass surveillance. He opposed national
17994 exceptionalism, he brought clarity to legal and policy debates, he
17995 understood and predicted the impact of mass surveillance on the world,
17996 and he laid the groundwork for resisting it. While serving on the Tor
17997 Project's board of directors, he brought us his uncompromising focus
17998 on technical excellence in the service of humankind. Caspar was an
17999 inimitable force for good and a wonderful friend. He was kind,
18000 humorous, generous, gallant, and believed we should protect one
18001 another without exception. We honor him here for his ideals, his
18002 efforts, and his accomplishments. Please honor his memory with works
18003 that would make him proud.
18005 Tor 0.2.7.5 is the first stable release in the Tor 0.2.7 series.
18007 The 0.2.7 series adds a more secure identity key type for relays,
18008 improves cryptography performance, resolves several longstanding
18009 hidden-service performance issues, improves controller support for
18010 hidden services, and includes small bugfixes and performance
18011 improvements throughout the program. This release series also includes
18012 more tests than before, and significant simplifications to which parts
18013 of Tor invoke which others.
18015 (This release contains no code changes since 0.2.7.4-rc.)
18018 Changes in version 0.2.7.4-rc - 2015-10-21
18019 Tor 0.2.7.4-rc is the second release candidate in the 0.2.7 series. It
18020 fixes some important memory leaks, and a scary-looking (but mostly
18021 harmless in practice) invalid-read bug. It also has a few small
18022 bugfixes, notably fixes for compilation and portability on different
18023 platforms. If no further significant bounds are found, the next
18024 release will the the official stable release.
18026 o Major bugfixes (security, correctness):
18027 - Fix an error that could cause us to read 4 bytes before the
18028 beginning of an openssl string. This bug could be used to cause
18029 Tor to crash on systems with unusual malloc implementations, or
18030 systems with unusual hardening installed. Fixes bug 17404; bugfix
18033 o Major bugfixes (correctness):
18034 - Fix a use-after-free bug in validate_intro_point_failure(). Fixes
18035 bug 17401; bugfix on 0.2.7.3-rc.
18037 o Major bugfixes (memory leaks):
18038 - Fix a memory leak in ed25519 batch signature checking. Fixes bug
18039 17398; bugfix on 0.2.6.1-alpha.
18040 - Fix a memory leak in rend_cache_failure_entry_free(). Fixes bug
18041 17402; bugfix on 0.2.7.3-rc.
18042 - Fix a memory leak when reading an expired signing key from disk.
18043 Fixes bug 17403; bugfix on 0.2.7.2-rc.
18045 o Minor features (geoIP):
18046 - Update geoip and geoip6 to the October 9 2015 Maxmind GeoLite2
18049 o Minor bugfixes (compilation):
18050 - Repair compilation with the most recent (unreleased, alpha)
18051 vesions of OpenSSL 1.1. Fixes part of ticket 17237.
18052 - Fix an integer overflow warning in test_crypto_slow.c. Fixes bug
18053 17251; bugfix on 0.2.7.2-alpha.
18054 - Fix compilation of sandbox.c with musl-libc. Fixes bug 17347;
18055 bugfix on 0.2.5.1-alpha. Patch from 'jamestk'.
18057 o Minor bugfixes (portability):
18058 - Use libexecinfo on FreeBSD to enable backtrace support. Fixes
18059 part of bug 17151; bugfix on 0.2.5.2-alpha. Patch from
18062 o Minor bugfixes (sandbox):
18063 - Add the "hidserv-stats" filename to our sandbox filter for the
18064 HiddenServiceStatistics option to work properly. Fixes bug 17354;
18065 bugfix on 0.2.6.2-alpha. Patch from David Goulet.
18067 o Minor bugfixes (testing):
18068 - Add unit tests for get_interface_address* failure cases. Fixes bug
18069 17173; bugfix on 0.2.7.3-rc. Patch by fk/teor.
18070 - Fix breakage when running 'make check' with BSD make. Fixes bug
18071 17154; bugfix on 0.2.7.3-rc. Patch by Marcin Cieślak.
18072 - Make the get_ifaddrs_* unit tests more tolerant of different
18073 network configurations. (Don't assume every test box has an IPv4
18074 address, and don't assume every test box has a non-localhost
18075 address.) Fixes bug 17255; bugfix on 0.2.7.3-rc. Patch by "teor".
18076 - Skip backtrace tests when backtrace support is not compiled in.
18077 Fixes part of bug 17151; bugfix on 0.2.7.1-alpha. Patch from
18081 - Fix capitalization of SOCKS in sample torrc. Closes ticket 15609.
18082 - Note that HiddenServicePorts can take a unix domain socket. Closes
18086 Changes in version 0.2.7.3-rc - 2015-09-25
18087 Tor 0.2.7.3-rc is the first release candidate in the 0.2.7 series. It
18088 contains numerous usability fixes for Ed25519 keys, safeguards against
18089 several misconfiguration problems, significant simplifications to
18090 Tor's callgraph, and numerous bugfixes and small features.
18092 This is the most tested release of Tor to date. The unit tests cover
18093 39.40% of the code, and the integration tests (accessible with "make
18094 test-full-online", requiring stem and chutney and a network
18095 connection) raise the coverage to 64.49%.
18097 o Major features (security, hidden services):
18098 - Hidden services, if using the EntryNodes option, are required to
18099 use more than one EntryNode, in order to avoid a guard discovery
18100 attack. (This would only affect people who had configured hidden
18101 services and manually specified the EntryNodes option with a
18102 single entry-node. The impact was that it would be easy to
18103 remotely identify the guard node used by such a hidden service.
18104 See ticket for more information.) Fixes ticket 14917.
18106 o Major features (Ed25519 keys, keypinning):
18107 - The key-pinning option on directory authorities is now advisory-
18108 only by default. In a future version, or when the AuthDirPinKeys
18109 option is set, pins are enforced again. Disabling key-pinning
18110 seemed like a good idea so that we can survive the fallout of any
18111 usability problems associated with Ed25519 keys. Closes
18114 o Major features (Ed25519 performance):
18115 - Improve the speed of Ed25519 operations and Curve25519 keypair
18116 generation when built targeting 32 bit x86 platforms with SSE2
18117 available. Implements ticket 16535.
18118 - Improve the runtime speed of Ed25519 signature verification by
18119 using Ed25519-donna's batch verification support. Implements
18122 o Major features (performance testing):
18123 - The test-network.sh script now supports performance testing.
18124 Requires corresponding chutney performance testing changes. Patch
18125 by "teor". Closes ticket 14175.
18127 o Major features (relay, Ed25519):
18128 - Significant usability improvements for Ed25519 key management. Log
18129 messages are better, and the code can recover from far more
18130 failure conditions. Thanks to "s7r" for reporting and diagnosing
18132 - Add a new OfflineMasterKey option to tell Tor never to try loading
18133 or generating a secret Ed25519 identity key. You can use this in
18134 combination with tor --keygen to manage offline and/or encrypted
18135 Ed25519 keys. Implements ticket 16944.
18136 - Add a --newpass option to allow changing or removing the
18137 passphrase of an encrypted key with tor --keygen. Implements part
18139 - On receiving a HUP signal, check to see whether the Ed25519
18140 signing key has changed, and reload it if so. Closes ticket 16790.
18142 o Major bugfixes (relay, Ed25519):
18143 - Avoid crashing on 'tor --keygen'. Fixes bug 16679; bugfix on
18144 0.2.7.2-alpha. Reported by "s7r".
18145 - Improve handling of expired signing keys with offline master keys.
18146 Fixes bug 16685; bugfix on 0.2.7.2-alpha. Reported by "s7r".
18148 o Minor features (client-side privacy):
18149 - New KeepAliveIsolateSOCKSAuth option to indefinitely extend circuit
18150 lifespan when IsolateSOCKSAuth and streams with SOCKS
18151 authentication are attached to the circuit. This allows
18152 applications like TorBrowser to manage circuit lifetime on their
18153 own. Implements feature 15482.
18154 - When logging malformed hostnames from SOCKS5 requests, respect
18155 SafeLogging configuration. Fixes bug 16891; bugfix on 0.1.1.16-rc.
18157 o Minor features (compilation):
18158 - Give a warning as early as possible when trying to build with an
18159 unsupported OpenSSL version. Closes ticket 16901.
18160 - Fail during configure if we're trying to build against an OpenSSL
18161 built without ECC support. Fixes bug 17109, bugfix on 0.2.7.1-alpha
18162 which started requiring ECC.
18164 o Minor features (geoip):
18165 - Update geoip and geoip6 to the September 3 2015 Maxmind GeoLite2
18168 o Minor features (hidden services):
18169 - Relays need to have the Fast flag to get the HSDir flag. As this
18170 is being written, we'll go from 2745 HSDirs down to 2342, a ~14%
18171 drop. This change should make some attacks against the hidden
18172 service directory system harder. Fixes ticket 15963.
18173 - Turn on hidden service statistics collection by setting the torrc
18174 option HiddenServiceStatistics to "1" by default. (This keeps
18175 track only of the fraction of traffic used by hidden services, and
18176 the total number of hidden services in existence.) Closes
18178 - Client now uses an introduction point failure cache to know when
18179 to fetch or keep a descriptor in their cache. Previously, failures
18180 were recorded implicitly, but not explicitly remembered. Closes
18183 o Minor features (testing, authorities, documentation):
18184 - New TestingDirAuthVote{Exit,Guard,HSDir}IsStrict flags to
18185 explicitly manage consensus flags in testing networks. Patch by
18186 "robgjansen", modified by "teor". Implements part of ticket 14882.
18188 o Minor bugfixes (security, exit policies):
18189 - ExitPolicyRejectPrivate now also rejects the relay's published
18190 IPv6 address (if any), and any publicly routable IPv4 or IPv6
18191 addresses on any local interfaces. ticket 17027. Patch by "teor".
18192 Fixes bug 17027; bugfix on 0.2.0.11-alpha.
18194 o Minor bug fixes (torrc exit policies):
18195 - In torrc, "accept6 *" and "reject6 *" ExitPolicy lines now only
18196 produce IPv6 wildcard addresses. Previously they would produce
18197 both IPv4 and IPv6 wildcard addresses. Patch by "teor". Fixes part
18198 of bug 16069; bugfix on 0.2.4.7-alpha.
18199 - When parsing torrc ExitPolicies, we now warn for a number of cases
18200 where the user's intent is likely to differ from Tor's actual
18201 behavior. These include: using an IPv4 address with an accept6 or
18202 reject6 line; using "private" on an accept6 or reject6 line; and
18203 including any ExitPolicy lines after accept *:* or reject *:*.
18204 Related to ticket 16069.
18205 - When parsing torrc ExitPolicies, we now issue an info-level
18206 message when expanding an "accept/reject *" line to include both
18207 IPv4 and IPv6 wildcard addresses. Related to ticket 16069.
18208 - In each instance above, usage advice is provided to avoid the
18209 message. Resolves ticket 16069. Patch by "teor". Fixes part of bug
18210 16069; bugfix on 0.2.4.7-alpha.
18212 o Minor bugfixes (authority):
18213 - Don't assign "HSDir" to a router if it isn't Valid and Running.
18214 Fixes bug 16524; bugfix on 0.2.7.2-alpha.
18215 - Downgrade log messages about Ed25519 key issues if they are in old
18216 cached router descriptors. Fixes part of bug 16286; bugfix
18218 - When we find an Ed25519 key issue in a cached descriptor, stop
18219 saying the descriptor was just "uploaded". Fixes another part of
18220 bug 16286; bugfix on 0.2.7.2-alpha.
18222 o Minor bugfixes (control port):
18223 - Repair a warning and a spurious result when getting the maximum
18224 number of file descriptors from the controller. Fixes bug 16697;
18225 bugfix on 0.2.7.2-alpha.
18227 o Minor bugfixes (correctness):
18228 - When calling channel_free_list(), avoid calling smartlist_remove()
18229 while inside a FOREACH loop. This partially reverts commit
18230 17356fe7fd96af where the correct SMARTLIST_DEL_CURRENT was
18231 incorrectly removed. Fixes bug 16924; bugfix on 0.2.4.4-alpha.
18233 o Minor bugfixes (documentation):
18234 - Advise users on how to configure separate IPv4 and IPv6 exit
18235 policies in the manpage and sample torrcs. Related to ticket 16069.
18236 - Fix the usage message of tor-resolve(1) so that it no longer lists
18237 the removed -F option. Fixes bug 16913; bugfix on 0.2.2.28-beta.
18238 - Fix an error in the manual page and comments for
18239 TestingDirAuthVoteHSDir[IsStrict], which suggested that a HSDir
18240 required "ORPort connectivity". While this is true, it is in no
18241 way unique to the HSDir flag. Of all the flags, only HSDirs need a
18242 DirPort configured in order for the authorities to assign that
18243 particular flag. Patch by "teor". Fixed as part of 14882; bugfix
18246 o Minor bugfixes (Ed25519):
18247 - Fix a memory leak when reading router descriptors with expired
18248 Ed25519 certificates. Fixes bug 16539; bugfix on 0.2.7.2-alpha.
18250 o Minor bugfixes (linux seccomp2 sandbox):
18251 - Allow bridge authorities to run correctly under the seccomp2
18252 sandbox. Fixes bug 16964; bugfix on 0.2.5.1-alpha.
18253 - Allow routers with ed25519 keys to run correctly under the
18254 seccomp2 sandbox. Fixes bug 16965; bugfix on 0.2.7.2-alpha.
18256 o Minor bugfixes (open file limit):
18257 - Fix set_max_file_descriptors() to set by default the max open file
18258 limit to the current limit when setrlimit() fails. Fixes bug
18259 16274; bugfix on 0.2.0.10-alpha. Patch by dgoulet.
18261 o Minor bugfixes (portability):
18262 - Try harder to normalize the exit status of the Tor process to the
18263 standard-provided range. Fixes bug 16975; bugfix on every version
18265 - Check correctly for Windows socket errors in the workqueue
18266 backend. Fixes bug 16741; bugfix on 0.2.6.3-alpha.
18267 - Fix the behavior of crypto_rand_time_range() when told to consider
18268 times before 1970. (These times were possible when running in a
18269 simulated network environment where time()'s output starts at
18270 zero.) Fixes bug 16980; bugfix on 0.2.7.1-alpha.
18271 - Restore correct operation of TLS client-cipher detection on
18272 OpenSSL 1.1. Fixes bug 14047; bugfix on 0.2.7.2-alpha.
18274 o Minor bugfixes (relay):
18275 - Ensure that worker threads actually exit when a fatal error or
18276 shutdown is indicated. This fix doesn't currently affect the
18277 behavior of Tor, because Tor workers never indicates fatal error
18278 or shutdown except in the unit tests. Fixes bug 16868; bugfix
18280 - Unblock threads before releasing the work queue mutex to ensure
18281 predictable scheduling behavior. Fixes bug 16644; bugfix
18284 o Code simplification and refactoring:
18285 - Change the function that's called when we need to retry all
18286 downloads so that it only reschedules the downloads to happen
18287 immediately, rather than launching them all at once itself. This
18288 further simplifies Tor's callgraph.
18289 - Move some format-parsing functions out of crypto.c and
18290 crypto_curve25519.c into crypto_format.c and/or util_format.c.
18291 - Move the client-only parts of init_keys() into a separate
18292 function. Closes ticket 16763.
18293 - Simplify the microdesc_free() implementation so that it no longer
18294 appears (to code analysis tools) to potentially invoke a huge
18295 suite of other microdesc functions.
18296 - Simply the control graph further by deferring the inner body of
18297 directory_all_unreachable() into a callback. Closes ticket 16762.
18298 - Treat the loss of an owning controller as equivalent to a SIGTERM
18299 signal. This removes a tiny amount of duplicated code, and
18300 simplifies our callgraph. Closes ticket 16788.
18301 - When generating an event to send to the controller, we no longer
18302 put the event over the network immediately. Instead, we queue
18303 these events, and use a Libevent callback to deliver them. This
18304 change simplifies Tor's callgraph by reducing the number of
18305 functions from which all other Tor functions are reachable. Closes
18307 - Wrap Windows-only C files inside '#ifdef _WIN32' so that tools
18308 that try to scan or compile every file on Unix won't decide that
18310 - Remove the unused "nulterminate" argument from buf_pullup().
18313 - Recommend a 40 GB example AccountingMax in torrc.sample rather
18314 than a 4 GB max. Closes ticket 16742.
18315 - Include the TUNING document in our source tarball. It is referred
18316 to in the ChangeLog and an error message. Fixes bug 16929; bugfix
18320 - The internal pure-C tor-fw-helper tool is now removed from the Tor
18321 distribution, in favor of the pure-Go clone available from
18322 https://gitweb.torproject.org/tor-fw-helper.git/ . The libraries
18323 used by the C tor-fw-helper are not, in our opinion, very
18324 confidence- inspiring in their secure-programming techniques.
18325 Closes ticket 13338.
18326 - Remove the code that would try to aggressively flush controller
18327 connections while writing to them. This code was introduced in
18328 0.1.2.7-alpha, in order to keep output buffers from exceeding
18329 their limits. But there is no longer a maximum output buffer size,
18330 and flushing data in this way caused some undesirable recursions
18331 in our call graph. Closes ticket 16480.
18334 - Make "bridges+hs" the default test network. This tests almost all
18335 tor functionality during make test-network, while allowing tests
18336 to succeed on non-IPv6 systems. Requires chutney commit 396da92 in
18337 test-network-bridges-hs. Closes tickets 16945 (tor) and 16946
18338 (chutney). Patches by "teor".
18339 - Autodetect CHUTNEY_PATH if the chutney and Tor sources are side-
18340 by-side in the same parent directory. Closes ticket 16903. Patch
18342 - Use environment variables rather than autoconf substitutions to
18343 send variables from the build system to the test scripts. This
18344 change should be easier to maintain, and cause 'make distcheck' to
18345 work better than before. Fixes bug 17148.
18346 - Add a new set of callgraph analysis scripts that use clang to
18347 produce a list of which Tor functions are reachable from which
18348 other Tor functions. We're planning to use these to help simplify
18349 our code structure by identifying illogical dependencies.
18350 - Add new 'test-full' and 'test-full-online' targets to run all
18351 tests, including integration tests with stem and chutney.
18352 - Make the test-workqueue test work on Windows by initializing the
18353 network before we begin.
18354 - New make target (make test-network-all) to run multiple applicable
18355 chutney test cases. Patch from Teor; closes 16953.
18356 - Unit test dns_resolve(), dns_clip_ttl() and dns_get_expiry_ttl()
18357 functions in dns.c. Implements a portion of ticket 16831.
18358 - When building Tor with testing coverage enabled, run Chutney tests
18359 (if any) using the 'tor-cov' coverage binary.
18360 - When running test-network or test-stem, check for the absence of
18361 stem/chutney before doing any build operations.
18364 Changes in version 0.2.7.2-alpha - 2015-07-27
18365 This, the second alpha in the Tor 0.2.7 series, has a number of new
18366 features, including a way to manually pick the number of introduction
18367 points for hidden services, and the much stronger Ed25519 signing key
18368 algorithm for regular Tor relays (including support for encrypted
18369 offline identity keys in the new algorithm).
18371 Support for Ed25519 on relays is currently limited to signing router
18372 descriptors; later alphas in this series will extend Ed25519 key
18373 support to more parts of the Tor protocol.
18375 o Major features (Ed25519 identity keys, Proposal 220):
18376 - All relays now maintain a stronger identity key, using the Ed25519
18377 elliptic curve signature format. This master key is designed so
18378 that it can be kept offline. Relays also generate an online
18379 signing key, and a set of other Ed25519 keys and certificates.
18380 These are all automatically regenerated and rotated as needed.
18381 Implements part of ticket 12498.
18382 - Directory authorities now vote on Ed25519 identity keys along with
18383 RSA1024 keys. Implements part of ticket 12498.
18384 - Directory authorities track which Ed25519 identity keys have been
18385 used with which RSA1024 identity keys, and do not allow them to
18386 vary freely. Implements part of ticket 12498.
18387 - Microdescriptors now include Ed25519 identity keys. Implements
18388 part of ticket 12498.
18389 - Add support for offline encrypted Ed25519 master keys. To use this
18390 feature on your tor relay, run "tor --keygen" to make a new master
18391 key (or to make a new signing key if you already have a master
18392 key). Closes ticket 13642.
18394 o Major features (Hidden services):
18395 - Add the torrc option HiddenServiceNumIntroductionPoints, to
18396 specify a fixed number of introduction points. Its maximum value
18397 is 10 and default is 3. Using this option can increase a hidden
18398 service's reliability under load, at the cost of making it more
18399 visible that the hidden service is facing extra load. Closes
18401 - Remove the adaptive algorithm for choosing the number of
18402 introduction points, which used to change the number of
18403 introduction points (poorly) depending on the number of
18404 connections the HS sees. Closes ticket 4862.
18406 o Major features (onion key cross-certification):
18407 - Relay descriptors now include signatures of their own identity
18408 keys, made using the TAP and ntor onion keys. These signatures
18409 allow relays to prove ownership of their own onion keys. Because
18410 of this change, microdescriptors will no longer need to include
18411 RSA identity keys. Implements proposal 228; closes ticket 12499.
18413 o Major features (performance):
18414 - Improve the runtime speed of Ed25519 operations by using the
18415 public-domain Ed25519-donna by Andrew M. ("floodyberry").
18416 Implements ticket 16467.
18417 - Improve the runtime speed of the ntor handshake by using an
18418 optimized curve25519 basepoint scalarmult implementation from the
18419 public-domain Ed25519-donna by Andrew M. ("floodyberry"), based on
18420 ideas by Adam Langley. Implements ticket 9663.
18422 o Major bugfixes (client-side privacy, also in 0.2.6.9):
18423 - Properly separate out each SOCKSPort when applying stream
18424 isolation. The error occurred because each port's session group
18425 was being overwritten by a default value when the listener
18426 connection was initialized. Fixes bug 16247; bugfix on
18427 0.2.6.3-alpha. Patch by "jojelino".
18429 o Major bugfixes (hidden service clients, stability, also in 0.2.6.10):
18430 - Stop refusing to store updated hidden service descriptors on a
18431 client. This reverts commit 9407040c59218 (which indeed fixed bug
18432 14219, but introduced a major hidden service reachability
18433 regression detailed in bug 16381). This is a temporary fix since
18434 we can live with the minor issue in bug 14219 (it just results in
18435 some load on the network) but the regression of 16381 is too much
18436 of a setback. First-round fix for bug 16381; bugfix
18439 o Major bugfixes (hidden services):
18440 - When cannibalizing a circuit for an introduction point, always
18441 extend to the chosen exit node (creating a 4 hop circuit).
18442 Previously Tor would use the current circuit exit node, which
18443 changed the original choice of introduction point, and could cause
18444 the hidden service to skip excluded introduction points or
18445 reconnect to a skipped introduction point. Fixes bug 16260; bugfix
18448 o Major bugfixes (open file limit):
18449 - The open file limit wasn't checked before calling
18450 tor_accept_socket_nonblocking(), which would make Tor exceed the
18451 limit. Now, before opening a new socket, Tor validates the open
18452 file limit just before, and if the max has been reached, return an
18453 error. Fixes bug 16288; bugfix on 0.1.1.1-alpha.
18455 o Major bugfixes (stability, also in 0.2.6.10):
18456 - Stop crashing with an assertion failure when parsing certain kinds
18457 of malformed or truncated microdescriptors. Fixes bug 16400;
18458 bugfix on 0.2.6.1-alpha. Found by "torkeln"; fix based on a patch
18459 by "cypherpunks_backup".
18460 - Stop random client-side assertion failures that could occur when
18461 connecting to a busy hidden service, or connecting to a hidden
18462 service while a NEWNYM is in progress. Fixes bug 16013; bugfix
18465 o Minor features (directory authorities, security, also in 0.2.6.9):
18466 - The HSDir flag given by authorities now requires the Stable flag.
18467 For the current network, this results in going from 2887 to 2806
18468 HSDirs. Also, it makes it harder for an attacker to launch a sybil
18469 attack by raising the effort for a relay to become Stable to
18470 require at the very least 7 days, while maintaining the 96 hours
18471 uptime requirement for HSDir. Implements ticket 8243.
18473 o Minor features (client):
18474 - Relax the validation of hostnames in SOCKS5 requests, allowing the
18475 character '_' to appear, in order to cope with domains observed in
18476 the wild that are serving non-RFC compliant records. Resolves
18478 - Relax the validation done to hostnames in SOCKS5 requests, and
18479 allow a single trailing '.' to cope with clients that pass FQDNs
18480 using that syntax to explicitly indicate that the domain name is
18481 fully-qualified. Fixes bug 16674; bugfix on 0.2.6.2-alpha.
18482 - Add GroupWritable and WorldWritable options to unix-socket based
18483 SocksPort and ControlPort options. These options apply to a single
18484 socket, and override {Control,Socks}SocketsGroupWritable. Closes
18487 o Minor features (control protocol):
18488 - Support network-liveness GETINFO key and NETWORK_LIVENESS event in
18489 the control protocol. Resolves ticket 15358.
18491 o Minor features (directory authorities):
18492 - Directory authorities no longer vote against the "Fast", "Stable",
18493 and "HSDir" flags just because they were going to vote against
18494 "Running": if the consensus turns out to be that the router was
18495 running, then the authority's vote should count. Patch from Peter
18496 Retzlaff; closes issue 8712.
18498 o Minor features (geoip, also in 0.2.6.10):
18499 - Update geoip to the June 3 2015 Maxmind GeoLite2 Country database.
18500 - Update geoip6 to the June 3 2015 Maxmind GeoLite2 Country database.
18502 o Minor features (hidden services):
18503 - Add the new options "HiddenServiceMaxStreams" and
18504 "HiddenServiceMaxStreamsCloseCircuit" to allow hidden services to
18505 limit the maximum number of simultaneous streams per circuit, and
18506 optionally tear down the circuit when the limit is exceeded. Part
18509 o Minor features (portability):
18510 - Use C99 variadic macros when the compiler is not GCC. This avoids
18511 failing compilations on MSVC, and fixes a log-file-based race
18512 condition in our old workarounds. Original patch from Gisle Vanem.
18514 o Minor bugfixes (compilation, also in 0.2.6.9):
18515 - Build with --enable-systemd correctly when libsystemd is
18516 installed, but systemd is not. Fixes bug 16164; bugfix on
18517 0.2.6.3-alpha. Patch from Peter Palfrader.
18519 o Minor bugfixes (controller):
18520 - Add the descriptor ID in each HS_DESC control event. It was
18521 missing, but specified in control-spec.txt. Fixes bug 15881;
18522 bugfix on 0.2.5.2-alpha.
18524 o Minor bugfixes (crypto error-handling, also in 0.2.6.10):
18525 - Check for failures from crypto_early_init, and refuse to continue.
18526 A previous typo meant that we could keep going with an
18527 uninitialized crypto library, and would have OpenSSL initialize
18528 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
18529 when implementing ticket 4900. Patch by "teor".
18531 o Minor bugfixes (hidden services):
18532 - Fix a crash when reloading configuration while at least one
18533 configured and one ephemeral hidden service exists. Fixes bug
18534 16060; bugfix on 0.2.7.1-alpha.
18535 - Avoid crashing with a double-free bug when we create an ephemeral
18536 hidden service but adding it fails for some reason. Fixes bug
18537 16228; bugfix on 0.2.7.1-alpha.
18539 o Minor bugfixes (Linux seccomp2 sandbox):
18540 - Use the sandbox in tor_open_cloexec whether or not O_CLOEXEC is
18541 defined. Patch by "teor". Fixes bug 16515; bugfix on 0.2.3.1-alpha.
18543 o Minor bugfixes (Linux seccomp2 sandbox, also in 0.2.6.10):
18544 - Allow pipe() and pipe2() syscalls in the seccomp2 sandbox: we need
18545 these when eventfd2() support is missing. Fixes bug 16363; bugfix
18546 on 0.2.6.3-alpha. Patch from "teor".
18548 o Minor bugfixes (Linux seccomp2 sandbox, also in 0.2.6.9):
18549 - Fix sandboxing to work when running as a relay, by allowing the
18550 renaming of secret_id_key, and allowing the eventfd2 and futex
18551 syscalls. Fixes bug 16244; bugfix on 0.2.6.1-alpha. Patch by
18553 - Allow systemd connections to work with the Linux seccomp2 sandbox
18554 code. Fixes bug 16212; bugfix on 0.2.6.2-alpha. Patch by
18557 o Minor bugfixes (relay):
18558 - Fix a rarely-encountered memory leak when failing to initialize
18559 the thread pool. Fixes bug 16631; bugfix on 0.2.6.3-alpha. Patch
18560 from "cypherpunks".
18562 o Minor bugfixes (systemd):
18563 - Fix an accidental formatting error that broke the systemd
18564 configuration file. Fixes bug 16152; bugfix on 0.2.7.1-alpha.
18565 - Tor's systemd unit file no longer contains extraneous spaces.
18566 These spaces would sometimes confuse tools like deb-systemd-
18567 helper. Fixes bug 16162; bugfix on 0.2.5.5-alpha.
18569 o Minor bugfixes (tests):
18570 - Use the configured Python executable when running test-stem-full.
18571 Fixes bug 16470; bugfix on 0.2.7.1-alpha.
18573 o Minor bugfixes (tests, also in 0.2.6.9):
18574 - Fix a crash in the unit tests when built with MSVC2013. Fixes bug
18575 16030; bugfix on 0.2.6.2-alpha. Patch from "NewEraCracker".
18577 o Minor bugfixes (threads, comments):
18578 - Always initialize return value in compute_desc_id in rendcommon.c
18579 Patch by "teor". Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
18580 - Check for NULL values in getinfo_helper_onions(). Patch by "teor".
18581 Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
18582 - Remove undefined directive-in-macro in test_util_writepid clang
18583 3.7 complains that using a preprocessor directive inside a macro
18584 invocation in test_util_writepid in test_util.c is undefined.
18585 Patch by "teor". Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
18587 o Code simplification and refactoring:
18588 - Define WINVER and _WIN32_WINNT centrally, in orconfig.h, in order
18589 to ensure they remain consistent and visible everywhere.
18590 - Remove some vestigial workarounds for the MSVC6 compiler. We
18591 haven't supported that in ages.
18592 - The link authentication code has been refactored for better
18593 testability and reliability. It now uses code generated with the
18594 "trunnel" binary encoding generator, to reduce the risk of bugs
18595 due to programmer error. Done as part of ticket 12498.
18598 - Include a specific and (hopefully) accurate documentation of the
18599 torrc file's meta-format in doc/torrc_format.txt. This is mainly
18600 of interest to people writing programs to parse or generate torrc
18601 files. This document is not a commitment to long-term
18602 compatibility; some aspects of the current format are a bit
18603 ridiculous. Closes ticket 2325.
18605 o Removed features:
18606 - Tor no longer supports copies of OpenSSL that are missing support
18607 for Elliptic Curve Cryptography. (We began using ECC when
18608 available in 0.2.4.8-alpha, for more safe and efficient key
18609 negotiation.) In particular, support for at least one of P256 or
18610 P224 is now required, with manual configuration needed if only
18611 P224 is available. Resolves ticket 16140.
18612 - Tor no longer supports versions of OpenSSL before 1.0. (If you are
18613 on an operating system that has not upgraded to OpenSSL 1.0 or
18614 later, and you compile Tor from source, you will need to install a
18615 more recent OpenSSL to link Tor against.) These versions of
18616 OpenSSL are still supported by the OpenSSL, but the numerous
18617 cryptographic improvements in later OpenSSL releases makes them a
18618 clear choice. Resolves ticket 16034.
18619 - Remove the HidServDirectoryV2 option. Now all relays offer to
18620 store hidden service descriptors. Related to 16543.
18621 - Remove the VoteOnHidServDirectoriesV2 option, since all
18622 authorities have long set it to 1. Closes ticket 16543.
18625 - Document use of coverity, clang static analyzer, and clang dynamic
18626 undefined behavior and address sanitizers in doc/HACKING. Include
18627 detailed usage instructions in the blacklist. Patch by "teor".
18628 Closes ticket 15817.
18629 - The link authentication protocol code now has extensive tests.
18630 - The relay descriptor signature testing code now has
18632 - The test_workqueue program now runs faster, and is enabled by
18633 default as a part of "make check".
18634 - Now that OpenSSL has its own scrypt implementation, add an unit
18635 test that checks for interoperability between libscrypt_scrypt()
18636 and OpenSSL's EVP_PBE_scrypt() so that we could not use libscrypt
18637 and rely on EVP_PBE_scrypt() whenever possible. Resolves
18641 Changes in version 0.2.6.10 - 2015-07-12
18642 Tor version 0.2.6.10 fixes some significant stability and hidden
18643 service client bugs, bulletproofs the cryptography init process, and
18644 fixes a bug when using the sandbox code with some older versions of
18645 Linux. Everyone running an older version, especially an older version
18646 of 0.2.6, should upgrade.
18648 o Major bugfixes (hidden service clients, stability):
18649 - Stop refusing to store updated hidden service descriptors on a
18650 client. This reverts commit 9407040c59218 (which indeed fixed bug
18651 14219, but introduced a major hidden service reachability
18652 regression detailed in bug 16381). This is a temporary fix since
18653 we can live with the minor issue in bug 14219 (it just results in
18654 some load on the network) but the regression of 16381 is too much
18655 of a setback. First-round fix for bug 16381; bugfix
18658 o Major bugfixes (stability):
18659 - Stop crashing with an assertion failure when parsing certain kinds
18660 of malformed or truncated microdescriptors. Fixes bug 16400;
18661 bugfix on 0.2.6.1-alpha. Found by "torkeln"; fix based on a patch
18662 by "cypherpunks_backup".
18663 - Stop random client-side assertion failures that could occur when
18664 connecting to a busy hidden service, or connecting to a hidden
18665 service while a NEWNYM is in progress. Fixes bug 16013; bugfix
18668 o Minor features (geoip):
18669 - Update geoip to the June 3 2015 Maxmind GeoLite2 Country database.
18670 - Update geoip6 to the June 3 2015 Maxmind GeoLite2 Country database.
18672 o Minor bugfixes (crypto error-handling):
18673 - Check for failures from crypto_early_init, and refuse to continue.
18674 A previous typo meant that we could keep going with an
18675 uninitialized crypto library, and would have OpenSSL initialize
18676 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
18677 when implementing ticket 4900. Patch by "teor".
18679 o Minor bugfixes (Linux seccomp2 sandbox):
18680 - Allow pipe() and pipe2() syscalls in the seccomp2 sandbox: we need
18681 these when eventfd2() support is missing. Fixes bug 16363; bugfix
18682 on 0.2.6.3-alpha. Patch from "teor".
18685 Changes in version 0.2.6.9 - 2015-06-11
18686 Tor 0.2.6.9 fixes a regression in the circuit isolation code, increases the
18687 requirements for receiving an HSDir flag, and addresses some other small
18688 bugs in the systemd and sandbox code. Clients using circuit isolation
18689 should upgrade; all directory authorities should upgrade.
18691 o Major bugfixes (client-side privacy):
18692 - Properly separate out each SOCKSPort when applying stream
18693 isolation. The error occurred because each port's session group was
18694 being overwritten by a default value when the listener connection
18695 was initialized. Fixes bug 16247; bugfix on 0.2.6.3-alpha. Patch
18698 o Minor feature (directory authorities, security):
18699 - The HSDir flag given by authorities now requires the Stable flag.
18700 For the current network, this results in going from 2887 to 2806
18701 HSDirs. Also, it makes it harder for an attacker to launch a sybil
18702 attack by raising the effort for a relay to become Stable which
18703 takes at the very least 7 days to do so and by keeping the 96
18704 hours uptime requirement for HSDir. Implements ticket 8243.
18706 o Minor bugfixes (compilation):
18707 - Build with --enable-systemd correctly when libsystemd is
18708 installed, but systemd is not. Fixes bug 16164; bugfix on
18709 0.2.6.3-alpha. Patch from Peter Palfrader.
18711 o Minor bugfixes (Linux seccomp2 sandbox):
18712 - Fix sandboxing to work when running as a relaymby renaming of
18713 secret_id_key, and allowing the eventfd2 and futex syscalls. Fixes
18714 bug 16244; bugfix on 0.2.6.1-alpha. Patch by Peter Palfrader.
18715 - Allow systemd connections to work with the Linux seccomp2 sandbox
18716 code. Fixes bug 16212; bugfix on 0.2.6.2-alpha. Patch by
18719 o Minor bugfixes (tests):
18720 - Fix a crash in the unit tests when built with MSVC2013. Fixes bug
18721 16030; bugfix on 0.2.6.2-alpha. Patch from "NewEraCracker".
18724 Changes in version 0.2.6.8 - 2015-05-21
18725 Tor 0.2.6.8 fixes a bit of dodgy code in parsing INTRODUCE2 cells, and
18726 fixes an authority-side bug in assigning the HSDir flag. All directory
18727 authorities should upgrade.
18729 o Major bugfixes (hidden services, backport from 0.2.7.1-alpha):
18730 - Revert commit that made directory authorities assign the HSDir
18731 flag to relays without a DirPort; this was bad because such relays
18732 can't handle BEGIN_DIR cells. Fixes bug 15850; bugfix
18735 o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
18736 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
18737 a client authorized hidden service. Fixes bug 15823; bugfix
18740 o Minor features (geoip):
18741 - Update geoip to the April 8 2015 Maxmind GeoLite2 Country database.
18742 - Update geoip6 to the April 8 2015 Maxmind GeoLite2
18746 Changes in version 0.2.7.1-alpha - 2015-05-12
18747 Tor 0.2.7.1-alpha is the first alpha release in its series. It
18748 includes numerous small features and bugfixes against previous Tor
18749 versions, and numerous small infrastructure improvements. The most
18750 notable features are several new ways for controllers to interact with
18751 the hidden services subsystem.
18753 o New system requirements:
18754 - Tor no longer includes workarounds to support Libevent versions
18755 before 1.3e. Libevent 2.0 or later is recommended. Closes
18758 o Major features (controller):
18759 - Add the ADD_ONION and DEL_ONION commands that allow the creation
18760 and management of hidden services via the controller. Closes
18762 - New "GETINFO onions/current" and "GETINFO onions/detached"
18763 commands to get information about hidden services created via the
18764 controller. Part of ticket 6411.
18765 - New HSFETCH command to launch a request for a hidden service
18766 descriptor. Closes ticket 14847.
18767 - New HSPOST command to upload a hidden service descriptor. Closes
18768 ticket 3523. Patch by "DonnchaC".
18770 o Major bugfixes (hidden services):
18771 - Revert commit that made directory authorities assign the HSDir
18772 flag to relays without a DirPort; this was bad because such relays
18773 can't handle BEGIN_DIR cells. Fixes bug 15850; bugfix
18776 o Minor features (clock-jump tolerance):
18777 - Recover better when our clock jumps back many hours, like might
18778 happen for Tails or Whonix users who start with a very wrong
18779 hardware clock, use Tor to discover a more accurate time, and then
18780 fix their clock. Resolves part of ticket 8766.
18782 o Minor features (command-line interface):
18783 - Make --hash-password imply --hush to prevent unnecessary noise.
18784 Closes ticket 15542. Patch from "cypherpunks".
18785 - Print a warning whenever we find a relative file path being used
18786 as torrc option. Resolves issue 14018.
18788 o Minor features (controller):
18789 - Add DirAuthority lines for default directory authorities to the
18790 output of the "GETINFO config/defaults" command if not already
18791 present. Implements ticket 14840.
18792 - Controllers can now use "GETINFO hs/client/desc/id/..." to
18793 retrieve items from the client's hidden service descriptor cache.
18794 Closes ticket 14845.
18795 - Implement a new controller command "GETINFO status/fresh-relay-
18796 descs" to fetch a descriptor/extrainfo pair that was generated on
18797 demand just for the controller's use. Implements ticket 14784.
18799 o Minor features (DoS-resistance):
18800 - Make it harder for attackers to overload hidden services with
18801 introductions, by blocking multiple introduction requests on the
18802 same circuit. Resolves ticket 15515.
18804 o Minor features (geoip):
18805 - Update geoip to the April 8 2015 Maxmind GeoLite2 Country database.
18806 - Update geoip6 to the April 8 2015 Maxmind GeoLite2
18809 o Minor features (HS popularity countermeasure):
18810 - To avoid leaking HS popularity, don't cycle the introduction point
18811 when we've handled a fixed number of INTRODUCE2 cells but instead
18812 cycle it when a random number of introductions is reached, thus
18813 making it more difficult for an attacker to find out the amount of
18814 clients that have used the introduction point for a specific HS.
18815 Closes ticket 15745.
18817 o Minor features (logging):
18818 - Include the Tor version in all LD_BUG log messages, since people
18819 tend to cut and paste those into the bugtracker. Implements
18822 o Minor features (pluggable transports):
18823 - When launching managed pluggable transports on Linux systems,
18824 attempt to have the kernel deliver a SIGTERM on tor exit if the
18825 pluggable transport process is still running. Resolves
18827 - When launching managed pluggable transports, setup a valid open
18828 stdin in the child process that can be used to detect if tor has
18829 terminated. The "TOR_PT_EXIT_ON_STDIN_CLOSE" environment variable
18830 can be used by implementations to detect this new behavior.
18831 Resolves ticket 15435.
18833 o Minor features (testing):
18834 - Add a test to verify that the compiler does not eliminate our
18835 memwipe() implementation. Closes ticket 15377.
18836 - Add make rule `check-changes` to verify the format of changes
18837 files. Closes ticket 15180.
18838 - Add unit tests for control_event_is_interesting(). Add a compile-
18839 time check that the number of events doesn't exceed the capacity
18840 of control_event_t.event_mask. Closes ticket 15431, checks for
18841 bugs similar to 13085. Patch by "teor".
18842 - Command-line argument tests moved to Stem. Resolves ticket 14806.
18843 - Integrate the ntor, backtrace, and zero-length keys tests into the
18844 automake test suite. Closes ticket 15344.
18845 - Remove assertions during builds to determine Tor's test coverage.
18846 We don't want to trigger these even in assertions, so including
18847 them artificially makes our branch coverage look worse than it is.
18848 This patch provides the new test-stem-full and coverage-html-full
18849 configure options. Implements ticket 15400.
18851 o Minor bugfixes (build):
18852 - Improve out-of-tree builds by making non-standard rules work and
18853 clean up additional files and directories. Fixes bug 15053; bugfix
18856 o Minor bugfixes (command-line interface):
18857 - When "--quiet" is provided along with "--validate-config", do not
18858 write anything to stdout on success. Fixes bug 14994; bugfix
18860 - When complaining about bad arguments to "--dump-config", use
18861 stderr, not stdout.
18863 o Minor bugfixes (configuration, unit tests):
18864 - Only add the default fallback directories when the DirAuthorities,
18865 AlternateDirAuthority, and FallbackDir directory config options
18866 are set to their defaults. The default fallback directory list is
18867 currently empty, this fix will only change tor's behavior when it
18868 has default fallback directories. Includes unit tests for
18869 consider_adding_dir_servers(). Fixes bug 15642; bugfix on
18870 90f6071d8dc0 in 0.2.4.7-alpha. Patch by "teor".
18872 o Minor bugfixes (correctness):
18873 - For correctness, avoid modifying a constant string in
18874 handle_control_postdescriptor. Fixes bug 15546; bugfix
18876 - Remove side-effects from tor_assert() calls. This was harmless,
18877 because we never disable assertions, but it is bad style and
18878 unnecessary. Fixes bug 15211; bugfix on 0.2.5.5, 0.2.2.36,
18881 o Minor bugfixes (hidden service):
18882 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
18883 a client authorized hidden service. Fixes bug 15823; bugfix
18885 - Remove an extraneous newline character from the end of hidden
18886 service descriptors. Fixes bug 15296; bugfix on 0.2.0.10-alpha.
18888 o Minor bugfixes (interface):
18889 - Print usage information for --dump-config when it is used without
18890 an argument. Also, fix the error message to use different wording
18891 and add newline at the end. Fixes bug 15541; bugfix
18894 o Minor bugfixes (logs):
18895 - When building Tor under Clang, do not include an extra set of
18896 parentheses in log messages that include function names. Fixes bug
18897 15269; bugfix on every released version of Tor when compiled with
18898 recent enough Clang.
18900 o Minor bugfixes (network):
18901 - When attempting to use fallback technique for network interface
18902 lookup, disregard loopback and multicast addresses since they are
18903 unsuitable for public communications.
18905 o Minor bugfixes (statistics):
18906 - Disregard the ConnDirectionStatistics torrc options when Tor is
18907 not a relay since in that mode of operation no sensible data is
18908 being collected and because Tor might run into measurement hiccups
18909 when running as a client for some time, then becoming a relay.
18910 Fixes bug 15604; bugfix on 0.2.2.35.
18912 o Minor bugfixes (test networks):
18913 - When self-testing reachability, use ExtendAllowPrivateAddresses to
18914 determine if local/private addresses imply reachability. The
18915 previous fix used TestingTorNetwork, which implies
18916 ExtendAllowPrivateAddresses, but this excluded rare configurations
18917 where ExtendAllowPrivateAddresses is set but TestingTorNetwork is
18918 not. Fixes bug 15771; bugfix on 0.2.6.1-alpha. Patch by "teor",
18919 issue discovered by CJ Ess.
18921 o Minor bugfixes (testing):
18922 - Check for matching value in server response in ntor_ref.py. Fixes
18923 bug 15591; bugfix on 0.2.4.8-alpha. Reported and fixed
18925 - Set the severity correctly when testing
18926 get_interface_addresses_ifaddrs() and
18927 get_interface_addresses_win32(), so that the tests fail gracefully
18928 instead of triggering an assertion. Fixes bug 15759; bugfix on
18929 0.2.6.3-alpha. Reported by Nicolas Derive.
18931 o Code simplification and refactoring:
18932 - Move the hacky fallback code out of get_interface_address6() into
18933 separate function and get it covered with unit-tests. Resolves
18935 - Refactor hidden service client-side cache lookup to intelligently
18936 report its various failure cases, and disentangle failure cases
18937 involving a lack of introduction points. Closes ticket 14391.
18938 - Use our own Base64 encoder instead of OpenSSL's, to allow more
18939 control over the output. Part of ticket 15652.
18942 - Improve the descriptions of statistics-related torrc options in
18943 the manpage to describe rationale and possible uses cases. Fixes
18945 - Improve the layout and formatting of ./configure --help messages.
18946 Closes ticket 15024. Patch from "cypherpunks".
18947 - Standardize on the term "server descriptor" in the manual page.
18948 Previously, we had used "router descriptor", "server descriptor",
18949 and "relay descriptor" interchangeably. Part of ticket 14987.
18952 - Remove `USE_OPENSSL_BASE64` and the corresponding fallback code
18953 and always use the internal Base64 decoder. The internal decoder
18954 has been part of tor since 0.2.0.10-alpha, and no one should
18955 be using the OpenSSL one. Part of ticket 15652.
18956 - Remove the 'tor_strclear()' function; use memwipe() instead.
18957 Closes ticket 14922.
18959 o Removed features:
18960 - Remove the (seldom-used) DynamicDHGroups feature. For anti-
18961 fingerprinting we now recommend pluggable transports; for forward-
18962 secrecy in TLS, we now use the P-256 group. Closes ticket 13736.
18963 - Remove the undocumented "--digests" command-line option. It
18964 complicated our build process, caused subtle build issues on
18965 multiple platforms, and is now redundant since we started
18966 including git version identifiers. Closes ticket 14742.
18967 - Tor no longer contains checks for ancient directory cache versions
18968 that didn't know about microdescriptors.
18969 - Tor no longer contains workarounds for stat files generated by
18970 super-old versions of Tor that didn't choose guards sensibly.
18973 Changes in version 0.2.4.27 - 2015-04-06
18974 Tor 0.2.4.27 backports two fixes from 0.2.6.7 for security issues that
18975 could be used by an attacker to crash hidden services, or crash clients
18976 visiting hidden services. Hidden services should upgrade as soon as
18977 possible; clients should upgrade whenever packages become available.
18979 This release also backports a simple improvement to make hidden
18980 services a bit less vulnerable to denial-of-service attacks.
18982 o Major bugfixes (security, hidden service):
18983 - Fix an issue that would allow a malicious client to trigger an
18984 assertion failure and halt a hidden service. Fixes bug 15600;
18985 bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
18986 - Fix a bug that could cause a client to crash with an assertion
18987 failure when parsing a malformed hidden service descriptor. Fixes
18988 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
18990 o Minor features (DoS-resistance, hidden service):
18991 - Introduction points no longer allow multiple INTRODUCE1 cells to
18992 arrive on the same circuit. This should make it more expensive for
18993 attackers to overwhelm hidden services with introductions.
18994 Resolves ticket 15515.
18997 Changes in version 0.2.5.12 - 2015-04-06
18998 Tor 0.2.5.12 backports two fixes from 0.2.6.7 for security issues that
18999 could be used by an attacker to crash hidden services, or crash clients
19000 visiting hidden services. Hidden services should upgrade as soon as
19001 possible; clients should upgrade whenever packages become available.
19003 This release also backports a simple improvement to make hidden
19004 services a bit less vulnerable to denial-of-service attacks.
19006 o Major bugfixes (security, hidden service):
19007 - Fix an issue that would allow a malicious client to trigger an
19008 assertion failure and halt a hidden service. Fixes bug 15600;
19009 bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
19010 - Fix a bug that could cause a client to crash with an assertion
19011 failure when parsing a malformed hidden service descriptor. Fixes
19012 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
19014 o Minor features (DoS-resistance, hidden service):
19015 - Introduction points no longer allow multiple INTRODUCE1 cells to
19016 arrive on the same circuit. This should make it more expensive for
19017 attackers to overwhelm hidden services with introductions.
19018 Resolves ticket 15515.
19021 Changes in version 0.2.6.7 - 2015-04-06
19022 Tor 0.2.6.7 fixes two security issues that could be used by an
19023 attacker to crash hidden services, or crash clients visiting hidden
19024 services. Hidden services should upgrade as soon as possible; clients
19025 should upgrade whenever packages become available.
19027 This release also contains two simple improvements to make hidden
19028 services a bit less vulnerable to denial-of-service attacks.
19030 o Major bugfixes (security, hidden service):
19031 - Fix an issue that would allow a malicious client to trigger an
19032 assertion failure and halt a hidden service. Fixes bug 15600;
19033 bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
19034 - Fix a bug that could cause a client to crash with an assertion
19035 failure when parsing a malformed hidden service descriptor. Fixes
19036 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
19038 o Minor features (DoS-resistance, hidden service):
19039 - Introduction points no longer allow multiple INTRODUCE1 cells to
19040 arrive on the same circuit. This should make it more expensive for
19041 attackers to overwhelm hidden services with introductions.
19042 Resolves ticket 15515.
19043 - Decrease the amount of reattempts that a hidden service performs
19044 when its rendezvous circuits fail. This reduces the computational
19045 cost for running a hidden service under heavy load. Resolves
19049 Changes in version 0.2.6.6 - 2015-03-24
19050 Tor 0.2.6.6 is the first stable release in the 0.2.6 series.
19052 It adds numerous safety, security, correctness, and performance
19053 improvements. Client programs can be configured to use more kinds of
19054 sockets, AutomapHosts works better, the multithreading backend is
19055 improved, cell transmission is refactored, test coverage is much
19056 higher, more denial-of-service attacks are handled, guard selection is
19057 improved to handle long-term guards better, pluggable transports
19058 should work a bit better, and some annoying hidden service performance
19059 bugs should be addressed.
19061 o Minor bugfixes (portability):
19062 - Use the correct datatype in the SipHash-2-4 function to prevent
19063 compilers from assuming any sort of alignment. Fixes bug 15436;
19064 bugfix on 0.2.5.3-alpha.
19066 Changes in version 0.2.6.5-rc - 2015-03-18
19067 Tor 0.2.6.5-rc is the second and (hopefully) last release candidate in
19068 the 0.2.6. It fixes a small number of bugs found in 0.2.6.4-rc.
19070 o Major bugfixes (client):
19071 - Avoid crashing when making certain configuration option changes on
19072 clients. Fixes bug 15245; bugfix on 0.2.6.3-alpha. Reported
19075 o Major bugfixes (pluggable transports):
19076 - Initialize the extended OR Port authentication cookie before
19077 launching pluggable transports. This prevents a race condition
19078 that occurred when server-side pluggable transports would cache the
19079 authentication cookie before it has been (re)generated. Fixes bug
19080 15240; bugfix on 0.2.5.1-alpha.
19082 o Major bugfixes (portability):
19083 - Do not crash on startup when running on Solaris. Fixes a bug
19084 related to our fix for 9495; bugfix on 0.2.6.1-alpha. Reported
19087 o Minor features (heartbeat):
19088 - On relays, report how many connections we negotiated using each
19089 version of the Tor link protocols. This information will let us
19090 know if removing support for very old versions of the Tor
19091 protocols is harming the network. Closes ticket 15212.
19093 o Code simplification and refactoring:
19094 - Refactor main loop to extract the 'loop' part. This makes it
19095 easier to run Tor under Shadow. Closes ticket 15176.
19098 Changes in version 0.2.5.11 - 2015-03-17
19099 Tor 0.2.5.11 is the second stable release in the 0.2.5 series.
19101 It backports several bugfixes from the 0.2.6 branch, including a
19102 couple of medium-level security fixes for relays and exit nodes.
19103 It also updates the list of directory authorities.
19105 o Directory authority changes:
19106 - Remove turtles as a directory authority.
19107 - Add longclaw as a new (v3) directory authority. This implements
19108 ticket 13296. This keeps the directory authority count at 9.
19109 - The directory authority Faravahar has a new IP address. This
19110 closes ticket 14487.
19112 o Major bugfixes (crash, OSX, security):
19113 - Fix a remote denial-of-service opportunity caused by a bug in
19114 OSX's _strlcat_chk() function. Fixes bug 15205; bug first appeared
19117 o Major bugfixes (relay, stability, possible security):
19118 - Fix a bug that could lead to a relay crashing with an assertion
19119 failure if a buffer of exactly the wrong layout was passed to
19120 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
19121 0.2.0.10-alpha. Patch from 'cypherpunks'.
19122 - Do not assert if the 'data' pointer on a buffer is advanced to the
19123 very end of the buffer; log a BUG message instead. Only assert if
19124 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
19126 o Major bugfixes (exit node stability):
19127 - Fix an assertion failure that could occur under high DNS load.
19128 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
19129 diagnosed and fixed by "cypherpunks".
19131 o Major bugfixes (Linux seccomp2 sandbox):
19132 - Upon receiving sighup with the seccomp2 sandbox enabled, do not
19133 crash during attempts to call wait4. Fixes bug 15088; bugfix on
19134 0.2.5.1-alpha. Patch from "sanic".
19136 o Minor features (controller):
19137 - New "GETINFO bw-event-cache" to get information about recent
19138 bandwidth events. Closes ticket 14128. Useful for controllers to
19139 get recent bandwidth history after the fix for ticket 13988.
19141 o Minor features (geoip):
19142 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
19143 - Update geoip6 to the March 3 2015 Maxmind GeoLite2
19146 o Minor bugfixes (client, automapping):
19147 - Avoid crashing on torrc lines for VirtualAddrNetworkIPv[4|6] when
19148 no value follows the option. Fixes bug 14142; bugfix on
19149 0.2.4.7-alpha. Patch by "teor".
19150 - Fix a memory leak when using AutomapHostsOnResolve. Fixes bug
19151 14195; bugfix on 0.1.0.1-rc.
19153 o Minor bugfixes (compilation):
19154 - Build without warnings with the stock OpenSSL srtp.h header, which
19155 has a duplicate declaration of SSL_get_selected_srtp_profile().
19156 Fixes bug 14220; this is OpenSSL's bug, not ours.
19158 o Minor bugfixes (directory authority):
19159 - Allow directory authorities to fetch more data from one another if
19160 they find themselves missing lots of votes. Previously, they had
19161 been bumping against the 10 MB queued data limit. Fixes bug 14261;
19162 bugfix on 0.1.2.5-alpha.
19163 - Enlarge the buffer to read bwauth generated files to avoid an
19164 issue when parsing the file in dirserv_read_measured_bandwidths().
19165 Fixes bug 14125; bugfix on 0.2.2.1-alpha.
19167 o Minor bugfixes (statistics):
19168 - Increase period over which bandwidth observations are aggregated
19169 from 15 minutes to 4 hours. Fixes bug 13988; bugfix on 0.0.8pre1.
19171 o Minor bugfixes (preventative security, C safety):
19172 - When reading a hexadecimal, base-32, or base-64 encoded value from
19173 a string, always overwrite the whole output buffer. This prevents
19174 some bugs where we would look at (but fortunately, not reveal)
19175 uninitialized memory on the stack. Fixes bug 14013; bugfix on all
19179 Changes in version 0.2.4.26 - 2015-03-17
19180 Tor 0.2.4.26 includes an updated list of directory authorities. It
19181 also backports a couple of stability and security bugfixes from 0.2.5
19184 o Directory authority changes:
19185 - Remove turtles as a directory authority.
19186 - Add longclaw as a new (v3) directory authority. This implements
19187 ticket 13296. This keeps the directory authority count at 9.
19188 - The directory authority Faravahar has a new IP address. This
19189 closes ticket 14487.
19191 o Major bugfixes (exit node stability, also in 0.2.6.3-alpha):
19192 - Fix an assertion failure that could occur under high DNS load.
19193 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
19194 diagnosed and fixed by "cypherpunks".
19196 o Major bugfixes (relay, stability, possible security, also in 0.2.6.4-rc):
19197 - Fix a bug that could lead to a relay crashing with an assertion
19198 failure if a buffer of exactly the wrong layout was passed to
19199 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
19200 0.2.0.10-alpha. Patch from 'cypherpunks'.
19201 - Do not assert if the 'data' pointer on a buffer is advanced to the
19202 very end of the buffer; log a BUG message instead. Only assert if
19203 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
19205 o Minor features (geoip):
19206 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
19207 - Update geoip6 to the March 3 2015 Maxmind GeoLite2
19210 Changes in version 0.2.6.4-rc - 2015-03-09
19211 Tor 0.2.6.4-alpha fixes an issue in the directory code that an
19212 attacker might be able to use in order to crash certain Tor
19213 directories. It also resolves some minor issues left over from, or
19214 introduced in, Tor 0.2.6.3-alpha or earlier.
19216 o Major bugfixes (crash, OSX, security):
19217 - Fix a remote denial-of-service opportunity caused by a bug in
19218 OSX's _strlcat_chk() function. Fixes bug 15205; bug first appeared
19221 o Major bugfixes (relay, stability, possible security):
19222 - Fix a bug that could lead to a relay crashing with an assertion
19223 failure if a buffer of exactly the wrong layout is passed to
19224 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
19225 0.2.0.10-alpha. Patch from "cypherpunks".
19226 - Do not assert if the 'data' pointer on a buffer is advanced to the
19227 very end of the buffer; log a BUG message instead. Only assert if
19228 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
19230 o Major bugfixes (FreeBSD IPFW transparent proxy):
19231 - Fix address detection with FreeBSD transparent proxies, when
19232 "TransProxyType ipfw" is in use. Fixes bug 15064; bugfix
19235 o Major bugfixes (Linux seccomp2 sandbox):
19236 - Pass IPPROTO_TCP rather than 0 to socket(), so that the Linux
19237 seccomp2 sandbox doesn't fail. Fixes bug 14989; bugfix
19239 - Allow AF_UNIX hidden services to be used with the seccomp2
19240 sandbox. Fixes bug 15003; bugfix on 0.2.6.3-alpha.
19241 - Upon receiving sighup with the seccomp2 sandbox enabled, do not
19242 crash during attempts to call wait4. Fixes bug 15088; bugfix on
19243 0.2.5.1-alpha. Patch from "sanic".
19245 o Minor features (controller):
19246 - Messages about problems in the bootstrap process now include
19247 information about the server we were trying to connect to when we
19248 noticed the problem. Closes ticket 15006.
19250 o Minor features (geoip):
19251 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
19252 - Update geoip6 to the March 3 2015 Maxmind GeoLite2
19255 o Minor features (logs):
19256 - Quiet some log messages in the heartbeat and at startup. Closes
19259 o Minor bugfixes (certificate handling):
19260 - If an authority operator accidentally makes a signing certificate
19261 with a future publication time, do not discard its real signing
19262 certificates. Fixes bug 11457; bugfix on 0.2.0.3-alpha.
19263 - Remove any old authority certificates that have been superseded
19264 for at least two days. Previously, we would keep superseded
19265 certificates until they expired, if they were published close in
19266 time to the certificate that superseded them. Fixes bug 11454;
19267 bugfix on 0.2.1.8-alpha.
19269 o Minor bugfixes (compilation):
19270 - Fix a compilation warning on s390. Fixes bug 14988; bugfix
19272 - Fix a compilation warning on FreeBSD. Fixes bug 15151; bugfix
19275 o Minor bugfixes (testing):
19276 - Fix endianness issues in unit test for resolve_my_address() to
19277 have it pass on big endian systems. Fixes bug 14980; bugfix on
19279 - Avoid a side-effect in a tor_assert() in the unit tests. Fixes bug
19280 15188; bugfix on 0.1.2.3-alpha. Patch from Tom van der Woerdt.
19281 - When running the new 'make test-stem' target, use the configured
19282 python binary. Fixes bug 15037; bugfix on 0.2.6.3-alpha. Patch
19283 from "cypherpunks".
19284 - When running the zero-length-keys tests, do not use the default
19285 torrc file. Fixes bug 15033; bugfix on 0.2.6.3-alpha. Reported
19288 o Directory authority IP change:
19289 - The directory authority Faravahar has a new IP address. This
19290 closes ticket 14487.
19293 - Remove some lingering dead code that once supported mempools.
19294 Mempools were disabled by default in 0.2.5, and removed entirely
19295 in 0.2.6.3-alpha. Closes more of ticket 14848; patch
19299 Changes in version 0.2.6.3-alpha - 2015-02-19
19300 Tor 0.2.6.3-alpha is the third (and hopefully final) alpha release in
19301 the 0.2.6.x series. It introduces support for more kinds of sockets,
19302 makes it harder to accidentally run an exit, improves our
19303 multithreading backend, incorporates several fixes for the
19304 AutomapHostsOnResolve option, and fixes numerous other bugs besides.
19306 If no major regressions or security holes are found in this version,
19307 the next version will be a release candidate.
19309 o Deprecated versions:
19310 - Tor relays older than 0.2.4.18-rc are no longer allowed to
19311 advertise themselves on the network. Closes ticket 13555.
19313 o Major features (security, unix domain sockets):
19314 - Allow SocksPort to be an AF_UNIX Unix Domain Socket. Now high risk
19315 applications can reach Tor without having to create AF_INET or
19316 AF_INET6 sockets, meaning they can completely disable their
19317 ability to make non-Tor network connections. To create a socket of
19318 this type, use "SocksPort unix:/path/to/socket". Implements
19320 - Support mapping hidden service virtual ports to AF_UNIX sockets.
19321 The syntax is "HiddenServicePort 80 unix:/path/to/socket".
19322 Implements ticket 11485.
19324 o Major features (changed defaults):
19325 - Prevent relay operators from unintentionally running exits: When a
19326 relay is configured as an exit node, we now warn the user unless
19327 the "ExitRelay" option is set to 1. We warn even more loudly if
19328 the relay is configured with the default exit policy, since this
19329 can indicate accidental misconfiguration. Setting "ExitRelay 0"
19330 stops Tor from running as an exit relay. Closes ticket 10067.
19332 o Major features (directory system):
19333 - When downloading server- or microdescriptors from a directory
19334 server, we no longer launch multiple simultaneous requests to the
19335 same server. This reduces load on the directory servers,
19336 especially when directory guards are in use. Closes ticket 9969.
19337 - When downloading server- or microdescriptors over a tunneled
19338 connection, do not limit the length of our requests to what the
19339 Squid proxy is willing to handle. Part of ticket 9969.
19340 - Authorities can now vote on the correct digests and latest
19341 versions for different software packages. This allows packages
19342 that include Tor to use the Tor authority system as a way to get
19343 notified of updates and their correct digests. Implements proposal
19344 227. Closes ticket 10395.
19346 o Major features (guards):
19347 - Introduce the Guardfraction feature to improves load balancing on
19348 guard nodes. Specifically, it aims to reduce the traffic gap that
19349 guard nodes experience when they first get the Guard flag. This is
19350 a required step if we want to increase the guard lifetime to 9
19351 months or greater. Closes ticket 9321.
19353 o Major features (performance):
19354 - Make the CPU worker implementation more efficient by avoiding the
19355 kernel and lengthening pipelines. The original implementation used
19356 sockets to transfer data from the main thread to the workers, and
19357 didn't allow any thread to be assigned more than a single piece of
19358 work at once. The new implementation avoids communications
19359 overhead by making requests in shared memory, avoiding kernel IO
19360 where possible, and keeping more requests in flight at once.
19361 Implements ticket 9682.
19363 o Major features (relay):
19364 - Raise the minimum acceptable configured bandwidth rate for bridges
19365 to 50 KiB/sec and for relays to 75 KiB/sec. (The old values were
19366 20 KiB/sec.) Closes ticket 13822.
19368 o Major bugfixes (exit node stability):
19369 - Fix an assertion failure that could occur under high DNS load.
19370 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
19371 diagnosed and fixed by "cypherpunks".
19373 o Major bugfixes (mixed relay-client operation):
19374 - When running as a relay and client at the same time (not
19375 recommended), if we decide not to use a new guard because we want
19376 to retry older guards, only close the locally-originating circuits
19377 passing through that guard. Previously we would close all the
19378 circuits through that guard. Fixes bug 9819; bugfix on
19379 0.2.1.1-alpha. Reported by "skruffy".
19381 o Minor features (build):
19382 - New --disable-system-torrc compile-time option to prevent Tor from
19383 looking for the system-wide torrc or torrc-defaults files.
19384 Resolves ticket 13037.
19386 o Minor features (controller):
19387 - Include SOCKS_USERNAME and SOCKS_PASSWORD values in controller
19388 events so controllers can observe circuit isolation inputs. Closes
19390 - ControlPort now supports the unix:/path/to/socket syntax as an
19391 alternative to the ControlSocket option, for consistency with
19392 SocksPort and HiddenServicePort. Closes ticket 14451.
19393 - New "GETINFO bw-event-cache" to get information about recent
19394 bandwidth events. Closes ticket 14128. Useful for controllers to
19395 get recent bandwidth history after the fix for ticket 13988.
19397 o Minor features (Denial of service resistance):
19398 - Count the total number of bytes used storing hidden service
19399 descriptors against the value of MaxMemInQueues. If we're low on
19400 memory, and more than 20% of our memory is used holding hidden
19401 service descriptors, free them until no more than 10% of our
19402 memory holds hidden service descriptors. Free the least recently
19403 fetched descriptors first. Resolves ticket 13806.
19404 - When we have recently been under memory pressure (over 3/4 of
19405 MaxMemInQueues is allocated), then allocate smaller zlib objects
19406 for small requests. Closes ticket 11791.
19408 o Minor features (geoip):
19409 - Update geoip and geoip6 files to the January 7 2015 Maxmind
19410 GeoLite2 Country database.
19412 o Minor features (guard nodes):
19413 - Reduce the time delay before saving guard status to disk from 10
19414 minutes to 30 seconds (or from one hour to 10 minutes if
19415 AvoidDiskWrites is set). Closes ticket 12485.
19417 o Minor features (hidden service):
19418 - Make Sybil attacks against hidden services harder by changing the
19419 minimum time required to get the HSDir flag from 25 hours up to 96
19420 hours. Addresses ticket 14149.
19421 - New option "HiddenServiceAllowUnknownPorts" to allow hidden
19422 services to disable the anti-scanning feature introduced in
19423 0.2.6.2-alpha. With this option not set, a connection to an
19424 unlisted port closes the circuit. With this option set, only a
19425 RELAY_DONE cell is sent. Closes ticket 14084.
19427 o Minor features (interface):
19428 - Implement "-f -" command-line option to read torrc configuration
19429 from standard input, if you don't want to store the torrc file in
19430 the file system. Implements feature 13865.
19432 o Minor features (logging):
19433 - Add a count of unique clients to the bridge heartbeat message.
19434 Resolves ticket 6852.
19435 - Suppress "router info incompatible with extra info" message when
19436 reading extrainfo documents from cache. (This message got loud
19437 around when we closed bug 9812 in 0.2.6.2-alpha.) Closes
19439 - Elevate hidden service authorized-client message from DEBUG to
19440 INFO. Closes ticket 14015.
19442 o Minor features (stability):
19443 - Add assertions in our hash-table iteration code to check for
19444 corrupted values that could cause infinite loops. Closes
19447 o Minor features (systemd):
19448 - Various improvements and modernizations in systemd hardening
19449 support. Closes ticket 13805. Patch from Craig Andrews.
19451 o Minor features (testing networks):
19452 - Drop the minimum RendPostPeriod on a testing network to 5 seconds,
19453 and the default on a testing network to 2 minutes. Drop the
19454 MIN_REND_INITIAL_POST_DELAY on a testing network to 5 seconds, but
19455 keep the default on a testing network at 30 seconds. This reduces
19456 HS bootstrap time to around 25 seconds. Also, change the default
19457 time in test-network.sh to match. Closes ticket 13401. Patch
19459 - Create TestingDirAuthVoteHSDir to correspond to
19460 TestingDirAuthVoteExit/Guard. Ensures that authorities vote the
19461 HSDir flag for the listed relays regardless of uptime or ORPort
19462 connectivity. Respects the value of VoteOnHidServDirectoriesV2.
19463 Partial implementation for ticket 14067. Patch by "teor".
19465 o Minor features (tor2web mode):
19466 - Introduce the config option Tor2webRendezvousPoints, which allows
19467 clients in Tor2webMode to select a specific Rendezvous Point to be
19468 used in HS circuits. This might allow better performance for
19469 Tor2Web nodes. Implements ticket 12844.
19471 o Minor bugfixes (client DNS):
19472 - Report the correct cached DNS expiration times on SOCKS port or in
19473 DNS replies. Previously, we would report everything as "never
19474 expires." Fixes bug 14193; bugfix on 0.2.3.17-beta.
19475 - Avoid a small memory leak when we find a cached answer for a
19476 reverse DNS lookup in a client-side DNS cache. (Remember, client-
19477 side DNS caching is off by default, and is not recommended.) Fixes
19478 bug 14259; bugfix on 0.2.0.1-alpha.
19480 o Minor bugfixes (client, automapping):
19481 - Avoid crashing on torrc lines for VirtualAddrNetworkIPv[4|6] when
19482 no value follows the option. Fixes bug 14142; bugfix on
19483 0.2.4.7-alpha. Patch by "teor".
19484 - Fix a memory leak when using AutomapHostsOnResolve. Fixes bug
19485 14195; bugfix on 0.1.0.1-rc.
19486 - Prevent changes to other options from removing the wildcard value
19487 "." from "AutomapHostsSuffixes". Fixes bug 12509; bugfix
19489 - Allow MapAddress and AutomapHostsOnResolve to work together when
19490 an address is mapped into another address type (like .onion) that
19491 must be automapped at resolve time. Fixes bug 7555; bugfix
19494 o Minor bugfixes (client, bridges):
19495 - When we are using bridges and we had a network connectivity
19496 problem, only retry connecting to our currently configured
19497 bridges, not all bridges we know about and remember using. Fixes
19498 bug 14216; bugfix on 0.2.2.17-alpha.
19500 o Minor bugfixes (client, IPv6):
19501 - Reject socks requests to literal IPv6 addresses when IPv6Traffic
19502 flag is not set; and not because the NoIPv4Traffic flag was set.
19503 Previously we'd looked at the NoIPv4Traffic flag for both types of
19504 literal addresses. Fixes bug 14280; bugfix on 0.2.4.7-alpha.
19506 o Minor bugfixes (compilation):
19507 - The address of an array in the middle of a structure will always
19508 be non-NULL. clang recognises this and complains. Disable the
19509 tautologous and redundant check to silence this warning. Fixes bug
19510 14001; bugfix on 0.2.1.2-alpha.
19511 - Avoid warnings when building with systemd 209 or later. Fixes bug
19512 14072; bugfix on 0.2.6.2-alpha. Patch from "h.venev".
19513 - Compile correctly with (unreleased) OpenSSL 1.1.0 headers.
19514 Addresses ticket 14188.
19515 - Build without warnings with the stock OpenSSL srtp.h header, which
19516 has a duplicate declaration of SSL_get_selected_srtp_profile().
19517 Fixes bug 14220; this is OpenSSL's bug, not ours.
19518 - Do not compile any code related to Tor2Web mode when Tor2Web mode
19519 is not enabled at compile time. Previously, this code was included
19520 in a disabled state. See discussion on ticket 12844.
19521 - Remove the --disable-threads configure option again. It was
19522 accidentally partially reintroduced in 29ac883606d6d. Fixes bug
19523 14819; bugfix on 0.2.6.2-alpha.
19525 o Minor bugfixes (controller):
19526 - Report "down" in response to the "GETINFO entry-guards" command
19527 when relays are down with an unreachable_since value. Previously,
19528 we would report "up". Fixes bug 14184; bugfix on 0.1.2.2-alpha.
19529 - Avoid crashing on a malformed EXTENDCIRCUIT command. Fixes bug
19530 14116; bugfix on 0.2.2.9-alpha.
19531 - Add a code for the END_CIRC_REASON_IP_NOW_REDUNDANT circuit close
19532 reason. Fixes bug 14207; bugfix on 0.2.6.2-alpha.
19534 o Minor bugfixes (directory authority):
19535 - Allow directory authorities to fetch more data from one another if
19536 they find themselves missing lots of votes. Previously, they had
19537 been bumping against the 10 MB queued data limit. Fixes bug 14261;
19538 bugfix on 0.1.2.5-alpha.
19539 - Do not attempt to download extrainfo documents which we will be
19540 unable to validate with a matching server descriptor. Fixes bug
19541 13762; bugfix on 0.2.0.1-alpha.
19542 - Fix a bug that was truncating AUTHDIR_NEWDESC events sent to the
19543 control port. Fixes bug 14953; bugfix on 0.2.0.1-alpha.
19544 - Enlarge the buffer to read bwauth generated files to avoid an
19545 issue when parsing the file in dirserv_read_measured_bandwidths().
19546 Fixes bug 14125; bugfix on 0.2.2.1-alpha.
19548 o Minor bugfixes (file handling):
19549 - Stop failing when key files are zero-length. Instead, generate new
19550 keys, and overwrite the empty key files. Fixes bug 13111; bugfix
19551 on all versions of Tor. Patch by "teor".
19552 - Stop generating a fresh .old RSA onion key file when the .old file
19553 is missing. Fixes part of 13111; bugfix on 0.0.6rc1.
19554 - Avoid overwriting .old key files with empty key files.
19555 - Skip loading zero-length extrainfo store, router store, stats,
19556 state, and key files.
19557 - Avoid crashing when trying to reload a torrc specified as a
19558 relative path with RunAsDaemon turned on. Fixes bug 13397; bugfix
19561 o Minor bugfixes (hidden services):
19562 - Close the introduction circuit when we have no more usable intro
19563 points, instead of waiting for it to time out. This also ensures
19564 that no follow-up HS descriptor fetch is triggered when the
19565 circuit eventually times out. Fixes bug 14224; bugfix on 0.0.6.
19566 - When fetching a hidden service descriptor for a down service that
19567 was recently up, do not keep refetching until we try the same
19568 replica twice in a row. Fixes bug 14219; bugfix on 0.2.0.10-alpha.
19569 - Successfully launch Tor with a nonexistent hidden service
19570 directory. Our fix for bug 13942 didn't catch this case. Fixes bug
19571 14106; bugfix on 0.2.6.2-alpha.
19573 o Minor bugfixes (logging):
19574 - Avoid crashing when there are more log domains than entries in
19575 domain_list. Bugfix on 0.2.3.1-alpha.
19576 - Add a string representation for LD_SCHED. Fixes bug 14740; bugfix
19578 - Don't log messages to stdout twice when starting up. Fixes bug
19579 13993; bugfix on 0.2.6.1-alpha.
19581 o Minor bugfixes (parsing):
19582 - Stop accepting milliseconds (or other junk) at the end of
19583 descriptor publication times. Fixes bug 9286; bugfix on 0.0.2pre25.
19584 - Support two-number and three-number version numbers correctly, in
19585 case we change the Tor versioning system in the future. Fixes bug
19586 13661; bugfix on 0.0.8pre1.
19588 o Minor bugfixes (path counting):
19589 - When deciding whether the consensus lists any exit nodes, count
19590 the number listed in the consensus, not the number we have
19591 descriptors for. Fixes part of bug 14918; bugfix on 0.2.6.2-alpha.
19592 - When deciding whether we have any exit nodes, only examine
19593 ExitNodes when the ExitNodes option is actually set. Fixes part of
19594 bug 14918; bugfix on 0.2.6.2-alpha.
19595 - Get rid of redundant and possibly scary warnings that we are
19596 missing directory information while we bootstrap. Fixes part of
19597 bug 14918; bugfix on 0.2.6.2-alpha.
19599 o Minor bugfixes (portability):
19600 - Fix the ioctl()-based network interface lookup code so that it
19601 will work on systems that have variable-length struct ifreq, for
19603 - Fix scheduler compilation on targets where char is unsigned. Fixes
19604 bug 14764; bugfix on 0.2.6.2-alpha. Reported by Christian Kujau.
19606 o Minor bugfixes (sandbox):
19607 - Allow glibc fatal errors to be sent to stderr before Tor exits.
19608 Previously, glibc would try to write them to /dev/tty, and the
19609 sandbox would trap the call and make Tor exit prematurely. Fixes
19610 bug 14759; bugfix on 0.2.5.1-alpha.
19612 o Minor bugfixes (shutdown):
19613 - When shutting down, always call event_del() on lingering read or
19614 write events before freeing them. Otherwise, we risk double-frees
19615 or read-after-frees in event_base_free(). Fixes bug 12985; bugfix
19618 o Minor bugfixes (small memory leaks):
19619 - Avoid leaking memory when using IPv6 virtual address mappings.
19620 Fixes bug 14123; bugfix on 0.2.4.7-alpha. Patch by Tom van
19623 o Minor bugfixes (statistics):
19624 - Increase period over which bandwidth observations are aggregated
19625 from 15 minutes to 4 hours. Fixes bug 13988; bugfix on 0.0.8pre1.
19627 o Minor bugfixes (systemd support):
19628 - Fix detection and operation of systemd watchdog. Fixes part of bug
19629 14141; bugfix on 0.2.6.2-alpha. Patch from Tomasz Torcz.
19630 - Run correctly under systemd with the RunAsDaemon option set. Fixes
19631 part of bug 14141; bugfix on 0.2.5.7-rc. Patch from Tomasz Torcz.
19632 - Inform the systemd supervisor about more changes in the Tor
19633 process status. Implements part of ticket 14141. Patch from
19635 - Cause the "--disable-systemd" option to actually disable systemd
19636 support. Fixes bug 14350; bugfix on 0.2.6.2-alpha. Patch
19639 o Minor bugfixes (TLS):
19640 - Check more thoroughly throughout the TLS code for possible
19641 unlogged TLS errors. Possible diagnostic or fix for bug 13319.
19643 o Minor bugfixes (transparent proxy):
19644 - Use getsockname, not getsockopt, to retrieve the address for a
19645 TPROXY-redirected connection. Fixes bug 13796; bugfix
19648 o Code simplification and refactoring:
19649 - Move fields related to isolating and configuring client ports into
19650 a shared structure. Previously, they were duplicated across
19651 port_cfg_t, listener_connection_t, and edge_connection_t. Failure
19652 to copy them correctly had been the cause of at least one bug in
19653 the past. Closes ticket 8546.
19654 - Refactor the get_interface_addresses_raw() doom-function into
19655 multiple smaller and simpler subfunctions. Cover the resulting
19656 subfunctions with unit-tests. Fixes a significant portion of
19658 - Remove workaround in dirserv_thinks_router_is_hs_dir() that was
19659 only for version <= 0.2.2.24 which is now deprecated. Closes
19661 - Remove a test for a long-defunct broken version-one
19665 - Adding section on OpenBSD to our TUNING document. Thanks to mmcc
19666 for writing the OpenBSD-specific tips. Resolves ticket 13702.
19667 - Make the tor-resolve documentation match its help string and its
19668 options. Resolves part of ticket 14325.
19669 - Log a more useful error message from tor-resolve when failing to
19670 look up a hidden service address. Resolves part of ticket 14325.
19672 o Downgraded warnings:
19673 - Don't warn when we've attempted to contact a relay using the wrong
19674 ntor onion key. Closes ticket 9635.
19676 o Removed features:
19677 - To avoid confusion with the "ExitRelay" option, "ExitNode" is no
19678 longer silently accepted as an alias for "ExitNodes".
19679 - The --enable-mempool and --enable-buf-freelists options, which
19680 were originally created to work around bad malloc implementations,
19681 no longer exist. They were off-by-default in 0.2.5. Closes
19685 - Make the checkdir/perms test complete successfully even if the
19686 global umask is not 022. Fixes bug 14215; bugfix on 0.2.6.2-alpha.
19687 - Test that tor does not fail when key files are zero-length. Check
19688 that tor generates new keys, and overwrites the empty key files.
19689 - Test that tor generates new keys when keys are missing
19690 (existing behavior).
19691 - Test that tor does not overwrite key files that already contain
19692 data (existing behavior). Tests bug 13111. Patch by "teor".
19693 - New "make test-stem" target to run stem integration tests.
19694 Requires that the "STEM_SOURCE_DIR" environment variable be set.
19695 Closes ticket 14107.
19696 - Make the test_cmdline_args.py script work correctly on Windows.
19697 Patch from Gisle Vanem.
19698 - Move the slower unit tests into a new "./src/test/test-slow"
19699 binary that can be run independently of the other tests. Closes
19701 - Avoid undefined behavior when sampling huge values from the
19702 Laplace distribution. This made unittests fail on Raspberry Pi.
19703 Bug found by Device. Fixes bug 14090; bugfix on 0.2.6.2-alpha.
19706 Changes in version 0.2.6.2-alpha - 2014-12-31
19707 Tor 0.2.6.2-alpha is the second alpha release in the 0.2.6.x series.
19708 It introduces a major new backend for deciding when to send cells on
19709 channels, which should lead down the road to big performance
19710 increases. It contains security and statistics features for better
19711 work on hidden services, and numerous bugfixes.
19713 This release contains many new unit tests, along with major
19714 performance improvements for running testing networks using Chutney.
19715 Thanks to a series of patches contributed by "teor", testing networks
19716 should now bootstrap in seconds, rather than minutes.
19718 o Major features (relay, infrastructure):
19719 - Complete revision of the code that relays use to decide which cell
19720 to send next. Formerly, we selected the best circuit to write on
19721 each channel, but we didn't select among channels in any
19722 sophisticated way. Now, we choose the best circuits globally from
19723 among those whose channels are ready to deliver traffic.
19725 This patch implements a new inter-cmux comparison API, a global
19726 high/low watermark mechanism and a global scheduler loop for
19727 transmission prioritization across all channels as well as among
19728 circuits on one channel. This schedule is currently tuned to
19729 (tolerantly) avoid making changes in network performance, but it
19730 should form the basis for major circuit performance increases in
19731 the future. Code by Andrea; tuning by Rob Jansen; implements
19734 o Major features (hidden services):
19735 - Make HS port scanning more difficult by immediately closing the
19736 circuit when a user attempts to connect to a nonexistent port.
19737 Closes ticket 13667.
19738 - Add a HiddenServiceStatistics option that allows Tor relays to
19739 gather and publish statistics about the overall size and volume of
19740 hidden service usage. Specifically, when this option is turned on,
19741 an HSDir will publish an approximate number of hidden services
19742 that have published descriptors to it the past 24 hours. Also, if
19743 a relay has acted as a hidden service rendezvous point, it will
19744 publish the approximate amount of rendezvous cells it has relayed
19745 the past 24 hours. The statistics themselves are obfuscated so
19746 that the exact values cannot be derived. For more details see
19747 proposal 238, "Better hidden service stats from Tor relays". This
19748 feature is currently disabled by default. Implements feature 13192.
19750 o Major bugfixes (client, automap):
19751 - Repair automapping with IPv6 addresses. This automapping should
19752 have worked previously, but one piece of debugging code that we
19753 inserted to detect a regression actually caused the regression to
19754 manifest itself again. Fixes bug 13811 and bug 12831; bugfix on
19755 0.2.4.7-alpha. Diagnosed and fixed by Francisco Blas
19758 o Major bugfixes (hidden services):
19759 - When closing an introduction circuit that was opened in parallel
19760 with others, don't mark the introduction point as unreachable.
19761 Previously, the first successful connection to an introduction
19762 point would make the other introduction points get marked as
19763 having timed out. Fixes bug 13698; bugfix on 0.0.6rc2.
19765 o Directory authority changes:
19766 - Remove turtles as a directory authority.
19767 - Add longclaw as a new (v3) directory authority. This implements
19768 ticket 13296. This keeps the directory authority count at 9.
19770 o Major removed features:
19771 - Tor clients no longer support connecting to hidden services
19772 running on Tor 0.2.2.x and earlier; the Support022HiddenServices
19773 option has been removed. (There shouldn't be any hidden services
19774 running these versions on the network.) Closes ticket 7803.
19776 o Minor features (client):
19777 - Validate hostnames in SOCKS5 requests more strictly. If SafeSocks
19778 is enabled, reject requests with IP addresses as hostnames.
19779 Resolves ticket 13315.
19781 o Minor features (controller):
19782 - Add a "SIGNAL HEARTBEAT" controller command that tells Tor to
19783 write an unscheduled heartbeat message to the log. Implements
19786 o Minor features (geoip):
19787 - Update geoip and geoip6 to the November 15 2014 Maxmind GeoLite2
19790 o Minor features (hidden services):
19791 - When re-enabling the network, don't try to build introduction
19792 circuits until we have successfully built a circuit. This makes
19793 hidden services come up faster when the network is re-enabled.
19794 Patch from "akwizgran". Closes ticket 13447.
19795 - When we fail to retrieve a hidden service descriptor, send the
19796 controller an "HS_DESC FAILED" controller event. Implements
19798 - New HiddenServiceDirGroupReadable option to cause hidden service
19799 directories and hostname files to be created group-readable. Patch
19800 from "anon", David Stainton, and "meejah". Closes ticket 11291.
19802 o Minor features (systemd):
19803 - Where supported, when running with systemd, report successful
19804 startup to systemd. Part of ticket 11016. Patch by Michael Scherer.
19805 - When running with systemd, support systemd watchdog messages. Part
19806 of ticket 11016. Patch by Michael Scherer.
19808 o Minor features (transparent proxy):
19809 - Update the transparent proxy option checks to allow for both ipfw
19810 and pf on OS X. Closes ticket 14002.
19811 - Use the correct option when using IPv6 with transparent proxy
19812 support on Linux. Resolves 13808. Patch by Francisco Blas
19815 o Minor bugfixes (preventative security, C safety):
19816 - When reading a hexadecimal, base-32, or base-64 encoded value from
19817 a string, always overwrite the whole output buffer. This prevents
19818 some bugs where we would look at (but fortunately, not reveal)
19819 uninitialized memory on the stack. Fixes bug 14013; bugfix on all
19821 - Clear all memory targeted by tor_addr_{to,from}_sockaddr(), not
19822 just the part that's used. This makes it harder for data leak bugs
19823 to occur in the event of other programming failures. Resolves
19826 o Minor bugfixes (client, microdescriptors):
19827 - Use a full 256 bits of the SHA256 digest of a microdescriptor when
19828 computing which microdescriptors to download. This keeps us from
19829 erroneous download behavior if two microdescriptor digests ever
19830 have the same first 160 bits. Fixes part of bug 13399; bugfix
19832 - Reset a router's status if its microdescriptor digest changes,
19833 even if the first 160 bits remain the same. Fixes part of bug
19834 13399; bugfix on 0.2.3.1-alpha.
19836 o Minor bugfixes (compilation):
19837 - Silence clang warnings under --enable-expensive-hardening,
19838 including implicit truncation of 64 bit values to 32 bit, const
19839 char assignment to self, tautological compare, and additional
19840 parentheses around equality tests. Fixes bug 13577; bugfix
19842 - Fix a clang warning about checking whether an address in the
19843 middle of a structure is NULL. Fixes bug 14001; bugfix
19846 o Minor bugfixes (hidden services):
19847 - Correctly send a controller event when we find that a rendezvous
19848 circuit has finished. Fixes bug 13936; bugfix on 0.1.1.5-alpha.
19849 - Pre-check directory permissions for new hidden-services to avoid
19850 at least one case of "Bug: Acting on config options left us in a
19851 broken state. Dying." Fixes bug 13942; bugfix on 0.0.6pre1.
19852 - When adding a new hidden service (for example, via SETCONF), Tor
19853 no longer congratulates the user for running a relay. Fixes bug
19854 13941; bugfix on 0.2.6.1-alpha.
19855 - When fetching hidden service descriptors, we now check not only
19856 for whether we got the hidden service we had in mind, but also
19857 whether we got the particular descriptors we wanted. This prevents
19858 a class of inefficient but annoying DoS attacks by hidden service
19859 directories. Fixes bug 13214; bugfix on 0.2.1.6-alpha. Reported
19862 o Minor bugfixes (Linux seccomp2 sandbox):
19863 - Make transparent proxy support work along with the seccomp2
19864 sandbox. Fixes part of bug 13808; bugfix on 0.2.5.1-alpha. Patch
19865 by Francisco Blas Izquierdo Riera.
19866 - Fix a memory leak in tor-resolve when running with the sandbox
19867 enabled. Fixes bug 14050; bugfix on 0.2.5.9-rc.
19869 o Minor bugfixes (logging):
19870 - Downgrade warnings about RSA signature failures to info log level.
19871 Emit a warning when an extra info document is found incompatible
19872 with a corresponding router descriptor. Fixes bug 9812; bugfix
19874 - Make connection_ap_handshake_attach_circuit() log the circuit ID
19875 correctly. Fixes bug 13701; bugfix on 0.0.6.
19877 o Minor bugfixes (misc):
19878 - Stop allowing invalid address patterns like "*/24" that contain
19879 both a wildcard address and a bit prefix length. This affects all
19880 our address-range parsing code. Fixes bug 7484; bugfix
19883 o Minor bugfixes (testing networks, fast startup):
19884 - Allow Tor to build circuits using a consensus with no exits. If
19885 the consensus has no exits (typical of a bootstrapping test
19886 network), allow Tor to build circuits once enough descriptors have
19887 been downloaded. This assists in bootstrapping a testing Tor
19888 network. Fixes bug 13718; bugfix on 0.2.4.10-alpha. Patch
19890 - When V3AuthVotingInterval is low, give a lower If-Modified-Since
19891 header to directory servers. This allows us to obtain consensuses
19892 promptly when the consensus interval is very short. This assists
19893 in bootstrapping a testing Tor network. Fixes parts of bugs 13718
19894 and 13963; bugfix on 0.2.0.3-alpha. Patch by "teor".
19895 - Stop assuming that private addresses are local when checking
19896 reachability in a TestingTorNetwork. Instead, when testing, assume
19897 all OR connections are remote. (This is necessary due to many test
19898 scenarios running all relays on localhost.) This assists in
19899 bootstrapping a testing Tor network. Fixes bug 13924; bugfix on
19900 0.1.0.1-rc. Patch by "teor".
19901 - Avoid building exit circuits from a consensus with no exits. Now
19902 thanks to our fix for 13718, we accept a no-exit network as not
19903 wholly lost, but we need to remember not to try to build exit
19904 circuits on it. Closes ticket 13814; patch by "teor".
19905 - Stop requiring exits to have non-zero bandwithcapacity in a
19906 TestingTorNetwork. Instead, when TestingMinExitFlagThreshold is 0,
19907 ignore exit bandwidthcapacity. This assists in bootstrapping a
19908 testing Tor network. Fixes parts of bugs 13718 and 13839; bugfix
19909 on 0.2.0.3-alpha. Patch by "teor".
19910 - Add "internal" to some bootstrap statuses when no exits are
19911 available. If the consensus does not contain Exits, Tor will only
19912 build internal circuits. In this case, relevant statuses will
19913 contain the word "internal" as indicated in the Tor control-
19914 spec.txt. When bootstrap completes, Tor will be ready to build
19915 internal circuits. If a future consensus contains Exits, exit
19916 circuits may become available. Fixes part of bug 13718; bugfix on
19917 0.2.4.10-alpha. Patch by "teor".
19918 - Decrease minimum consensus interval to 10 seconds when
19919 TestingTorNetwork is set, or 5 seconds for the first consensus.
19920 Fix assumptions throughout the code that assume larger intervals.
19921 Fixes bugs 13718 and 13823; bugfix on 0.2.0.3-alpha. Patch
19923 - Avoid excluding guards from path building in minimal test
19924 networks, when we're in a test network and excluding guards would
19925 exclude all relays. This typically occurs in incredibly small tor
19926 networks, and those using "TestingAuthVoteGuard *". Fixes part of
19927 bug 13718; bugfix on 0.1.1.11-alpha. Patch by "teor".
19929 o Code simplification and refactoring:
19930 - Stop using can_complete_circuits as a global variable; access it
19931 with a function instead.
19932 - Avoid using operators directly as macro arguments: this lets us
19933 apply coccinelle transformations to our codebase more directly.
19934 Closes ticket 13172.
19935 - Combine the functions used to parse ClientTransportPlugin and
19936 ServerTransportPlugin into a single function. Closes ticket 6456.
19937 - Add inline functions and convenience macros for inspecting channel
19938 state. Refactor the code to use convenience macros instead of
19939 checking channel state directly. Fixes issue 7356.
19940 - Document all members of was_router_added_t and rename
19941 ROUTER_WAS_NOT_NEW to ROUTER_IS_ALREADY_KNOWN to make it less
19942 confusable with ROUTER_WAS_TOO_OLD. Fixes issue 13644.
19943 - In connection_exit_begin_conn(), use END_CIRC_REASON_TORPROTOCOL
19944 constant instead of hardcoded value. Fixes issue 13840.
19945 - Refactor our generic strmap and digestmap types into a single
19946 implementation, so that we can add a new digest256map
19950 - Document the bridge-authority-only 'networkstatus-bridges' file.
19951 Closes ticket 13713; patch from "tom".
19952 - Fix typo in PredictedPortsRelevanceTime option description in
19953 manpage. Resolves issue 13707.
19954 - Stop suggesting that users specify relays by nickname: it isn't a
19955 good idea. Also, properly cross-reference how to specify relays in
19956 all parts of manual documenting options that take a list of
19957 relays. Closes ticket 13381.
19958 - Clarify the HiddenServiceDir option description in manpage to make
19959 it clear that relative paths are taken with respect to the current
19960 working directory. Also clarify that this behavior is not
19961 guaranteed to remain indefinitely. Fixes issue 13913.
19964 - New tests for many parts of channel, relay, and circuitmux
19965 functionality. Code by Andrea; part of 9262.
19966 - New tests for parse_transport_line(). Part of ticket 6456.
19967 - In the unit tests, use chgrp() to change the group of the unit
19968 test temporary directory to the current user, so that the sticky
19969 bit doesn't interfere with tests that check directory groups.
19971 - Add unit tests for resolve_my_addr(). Part of ticket 12376; patch
19975 Changes in version 0.2.6.1-alpha - 2014-10-30
19976 Tor 0.2.6.1-alpha is the first release in the Tor 0.2.6.x series. It
19977 includes numerous code cleanups and new tests, and fixes a large
19978 number of annoying bugs. Out-of-memory conditions are handled better
19979 than in 0.2.5, pluggable transports have improved proxy support, and
19980 clients now use optimistic data for contacting hidden services. Also,
19981 we are now more robust to changes in what we consider a parseable
19982 directory object, so that tightening restrictions does not have a risk
19983 of introducing infinite download loops.
19985 This is the first alpha release in a new series, so expect there to be
19986 bugs. Users who would rather test out a more stable branch should stay
19987 with 0.2.5.x for now.
19989 o New compiler and system requirements:
19990 - Tor 0.2.6.x requires that your compiler support more of the C99
19991 language standard than before. The 'configure' script now detects
19992 whether your compiler supports C99 mid-block declarations and
19993 designated initializers. If it does not, Tor will not compile.
19995 We may revisit this requirement if it turns out that a significant
19996 number of people need to build Tor with compilers that don't
19997 bother implementing a 15-year-old standard. Closes ticket 13233.
19998 - Tor no longer supports systems without threading support. When we
19999 began working on Tor, there were several systems that didn't have
20000 threads, or where the thread support wasn't able to run the
20001 threads of a single process on multiple CPUs. That no longer
20002 holds: every system where Tor needs to run well now has threading
20003 support. Resolves ticket 12439.
20005 o Removed platform support:
20006 - We no longer include special code to build on Windows CE; as far
20007 as we know, nobody has used Tor on Windows CE in a very long time.
20008 Closes ticket 11446.
20010 o Major features (bridges):
20011 - Expose the outgoing upstream HTTP/SOCKS proxy to pluggable
20012 transports if they are configured via the "TOR_PT_PROXY"
20013 environment variable. Implements proposal 232. Resolves
20016 o Major features (client performance, hidden services):
20017 - Allow clients to use optimistic data when connecting to a hidden
20018 service, which should remove a round-trip from hidden service
20019 initialization. See proposal 181 for details. Implements
20022 o Major features (directory system):
20023 - Upon receiving an unparseable directory object, if its digest
20024 matches what we expected, then don't try to download it again.
20025 Previously, when we got a descriptor we didn't like, we would keep
20026 trying to download it over and over. Closes ticket 11243.
20028 o Major features (sample torrc):
20029 - Add a new, infrequently-changed "torrc.minimal". This file is
20030 similar to torrc.sample, but it will change as infrequently as
20031 possible, for the benefit of users whose systems prompt them for
20032 intervention whenever a default configuration file is changed.
20033 Making this change allows us to update torrc.sample to be a more
20034 generally useful "sample torrc".
20036 o Major bugfixes (directory authorities):
20037 - Do not assign the HSDir flag to relays if they are not Valid, or
20038 currently hibernating. Fixes 12573; bugfix on 0.2.0.10-alpha.
20040 o Major bugfixes (directory bandwidth performance):
20041 - Don't flush the zlib buffer aggressively when compressing
20042 directory information for clients. This should save about 7% of
20043 the bandwidth currently used for compressed descriptors and
20044 microdescriptors. Fixes bug 11787; bugfix on 0.1.1.23.
20046 o Minor features (security, memory wiping):
20047 - Ensure we securely wipe keys from memory after
20048 crypto_digest_get_digest and init_curve25519_keypair_from_file
20049 have finished using them. Resolves ticket 13477.
20051 o Minor features (security, out-of-memory handling):
20052 - When handling an out-of-memory condition, allocate less memory for
20053 temporary data structures. Fixes issue 10115.
20054 - When handling an out-of-memory condition, consider more types of
20055 buffers, including those on directory connections, and zlib
20056 buffers. Resolves ticket 11792.
20059 - When identity keypair is generated for first time, log a
20060 congratulatory message that links to the new relay lifecycle
20061 document. Implements feature 10427.
20063 o Minor features (client):
20064 - Clients are now willing to send optimistic data (before they
20065 receive a 'connected' cell) to relays of any version. (Relays
20066 without support for optimistic data are no longer supported on the
20067 Tor network.) Resolves ticket 13153.
20069 o Minor features (directory authorities):
20070 - Don't list relays with a bandwidth estimate of 0 in the consensus.
20071 Implements a feature proposed during discussion of bug 13000.
20072 - In tor-gencert, report an error if the user provides the same
20073 argument more than once.
20074 - If a directory authority can't find a best consensus method in the
20075 votes that it holds, it now falls back to its favorite consensus
20076 method. Previously, it fell back to method 1. Neither of these is
20077 likely to get enough signatures, but "fall back to favorite"
20078 doesn't require us to maintain support an obsolete consensus
20079 method. Implements part of proposal 215.
20081 o Minor features (logging):
20082 - On Unix-like systems, you can now use named pipes as the target of
20083 the Log option, and other options that try to append to files.
20084 Closes ticket 12061. Patch from "carlo von lynX".
20085 - When opening a log file at startup, send it every log message that
20086 we generated between startup and opening it. Previously, log
20087 messages that were generated before opening the log file were only
20088 logged to stdout. Closes ticket 6938.
20089 - Add a TruncateLogFile option to overwrite logs instead of
20090 appending to them. Closes ticket 5583.
20092 o Minor features (portability, Solaris):
20093 - Threads are no longer disabled by default on Solaris; we believe
20094 that the versions of Solaris with broken threading support are all
20095 obsolete by now. Resolves ticket 9495.
20097 o Minor features (relay):
20098 - Re-check our address after we detect a changed IP address from
20099 getsockname(). This ensures that the controller command "GETINFO
20100 address" will report the correct value. Resolves ticket 11582.
20102 - A new AccountingRule option lets Relays set whether they'd like
20103 AccountingMax to be applied separately to inbound and outbound
20104 traffic, or applied to the sum of inbound and outbound traffic.
20105 Resolves ticket 961. Patch by "chobe".
20107 o Minor features (testing networks):
20108 - Add the TestingDirAuthVoteExit option, which lists nodes to assign
20109 the "Exit" flag regardless of their uptime, bandwidth, or exit
20110 policy. TestingTorNetwork must be set for this option to have any
20111 effect. Previously, authorities would take up to 35 minutes to
20112 give nodes the Exit flag in a test network. Partially implements
20115 o Minor features (validation):
20116 - Check all date/time values passed to tor_timegm and
20117 parse_rfc1123_time for validity, taking leap years into account.
20118 Improves HTTP header validation. Implemented with bug 13476.
20119 - In correct_tm(), limit the range of values returned by system
20120 localtime(_r) and gmtime(_r) to be between the years 1 and 8099.
20121 This means we don't have to deal with negative or too large dates,
20122 even if a clock is wrong. Otherwise we might fail to read a file
20123 written by us which includes such a date. Fixes bug 13476.
20125 o Minor bugfixes (bridge clients):
20126 - When configured to use a bridge without an identity digest (not
20127 recommended), avoid launching an extra channel to it when
20128 bootstrapping. Fixes bug 7733; bugfix on 0.2.4.4-alpha.
20130 o Minor bugfixes (bridges):
20131 - When DisableNetwork is set, do not launch pluggable transport
20132 plugins, and if any are running, terminate them. Fixes bug 13213;
20133 bugfix on 0.2.3.6-alpha.
20135 o Minor bugfixes (C correctness):
20136 - Fix several instances of possible integer overflow/underflow/NaN.
20137 Fixes bug 13104; bugfix on 0.2.3.1-alpha and later. Patches
20139 - In circuit_build_times_calculate_timeout() in circuitstats.c,
20140 avoid dividing by zero in the pareto calculations. This traps
20141 under clang's "undefined-trap" sanitizer. Fixes bug 13290; bugfix
20143 - Fix an integer overflow in format_time_interval(). Fixes bug
20144 13393; bugfix on 0.2.0.10-alpha.
20145 - Set the correct day of year value when the system's localtime(_r)
20146 or gmtime(_r) functions fail to set struct tm. Not externally
20147 visible. Fixes bug 13476; bugfix on 0.0.2pre14.
20148 - Avoid unlikely signed integer overflow in tor_timegm on systems
20149 with 32-bit time_t. Fixes bug 13476; bugfix on 0.0.2pre14.
20151 o Minor bugfixes (client):
20152 - Fix smartlist_choose_node_by_bandwidth() so that relays with the
20153 BadExit flag are not considered worthy candidates. Fixes bug
20154 13066; bugfix on 0.1.2.3-alpha.
20155 - Use the consensus schedule for downloading consensuses, and not
20156 the generic schedule. Fixes bug 11679; bugfix on 0.2.2.6-alpha.
20157 - Handle unsupported or malformed SOCKS5 requests properly by
20158 responding with the appropriate error message before closing the
20159 connection. Fixes bugs 12971 and 13314; bugfix on 0.0.2pre13.
20161 o Minor bugfixes (client, torrc):
20162 - Stop modifying the value of our DirReqStatistics torrc option just
20163 because we're not a bridge or relay. This bug was causing Tor
20164 Browser users to write "DirReqStatistics 0" in their torrc files
20165 as if they had chosen to change the config. Fixes bug 4244; bugfix
20167 - When GeoIPExcludeUnknown is enabled, do not incorrectly decide
20168 that our options have changed every time we SIGHUP. Fixes bug
20169 9801; bugfix on 0.2.4.10-alpha. Patch from "qwerty1".
20171 o Minor bugfixes (controller):
20172 - Return an error when the second or later arguments of the
20173 "setevents" controller command are invalid events. Previously we
20174 would return success while silently skipping invalid events. Fixes
20175 bug 13205; bugfix on 0.2.3.2-alpha. Reported by "fpxnns".
20177 o Minor bugfixes (directory system):
20178 - Always believe that v3 directory authorities serve extra-info
20179 documents, whether they advertise "caches-extra-info" or not.
20180 Fixes part of bug 11683; bugfix on 0.2.0.1-alpha.
20181 - When running as a v3 directory authority, advertise that you serve
20182 extra-info documents so that clients who want them can find them
20183 from you too. Fixes part of bug 11683; bugfix on 0.2.0.1-alpha.
20184 - Check the BRIDGE_DIRINFO flag bitwise rather than using equality.
20185 Previously, directories offering BRIDGE_DIRINFO and some other
20186 flag (i.e. microdescriptors or extrainfo) would be ignored when
20187 looking for bridges. Partially fixes bug 13163; bugfix
20190 o Minor bugfixes (networking):
20191 - Check for orconns and use connection_or_close_for_error() rather
20192 than connection_mark_for_close() directly in the getsockopt()
20193 failure case of connection_handle_write_impl(). Fixes bug 11302;
20194 bugfix on 0.2.4.4-alpha.
20196 o Minor bugfixes (relay):
20197 - When generating our family list, remove spaces from around the
20198 entries. Fixes bug 12728; bugfix on 0.2.1.7-alpha.
20199 - If our previous bandwidth estimate was 0 bytes, allow publishing a
20200 new relay descriptor immediately. Fixes bug 13000; bugfix
20203 o Minor bugfixes (testing networks):
20204 - Fix TestingDirAuthVoteGuard to properly give out Guard flags in a
20205 testing network. Fixes bug 13064; bugfix on 0.2.5.2-alpha.
20206 - Stop using the default authorities in networks which provide both
20207 AlternateDirAuthority and AlternateBridgeAuthority. Partially
20208 fixes bug 13163; bugfix on 0.2.0.13-alpha.
20210 o Minor bugfixes (testing):
20211 - Stop spawn test failures due to a race condition between the
20212 SIGCHLD handler updating the process status, and the test reading
20213 it. Fixes bug 13291; bugfix on 0.2.3.3-alpha.
20215 o Minor bugfixes (testing, Windows):
20216 - Avoid passing an extra backslash when creating a temporary
20217 directory for running the unit tests on Windows. Fixes bug 12392;
20218 bugfix on 0.2.2.25-alpha. Patch from Gisle Vanem.
20220 o Minor bugfixes (windows):
20221 - Remove code to special-case handling of NTE_BAD_KEYSET when
20222 acquiring windows CryptoAPI context. This error can't actually
20223 occur for the parameters we're providing. Fixes bug 10816; bugfix
20226 o Minor bugfixes (zlib):
20227 - Avoid truncating a zlib stream when trying to finalize it with an
20228 empty output buffer. Fixes bug 11824; bugfix on 0.1.1.23.
20231 - Allow our configure script to build correctly with autoconf 2.62
20232 again. Fixes bug 12693; bugfix on 0.2.5.2-alpha.
20233 - Improve the error message from ./configure to make it clear that
20234 when asciidoc has not been found, the user will have to either add
20235 --disable-asciidoc argument or install asciidoc. Resolves
20238 o Code simplification and refactoring:
20239 - Change the entry_is_live() function to take named bitfield
20240 elements instead of an unnamed list of booleans. Closes
20242 - Refactor and unit-test entry_is_time_to_retry() in entrynodes.c.
20243 Resolves ticket 12205.
20244 - Use calloc and reallocarray functions instead of multiply-
20245 then-malloc. This makes it less likely for us to fall victim to an
20246 integer overflow attack when allocating. Resolves ticket 12855.
20247 - Use the standard macro name SIZE_MAX, instead of our
20249 - Document usage of the NO_DIRINFO and ALL_DIRINFO flags clearly in
20250 functions which take them as arguments. Replace 0 with NO_DIRINFO
20251 in a function call for clarity. Seeks to prevent future issues
20253 - Avoid 4 null pointer errors under clang static analysis by using
20254 tor_assert() to prove that the pointers aren't null. Fixes
20256 - Rework the API of policies_parse_exit_policy() to use a bitmask to
20257 represent parsing options, instead of a confusing mess of
20258 booleans. Resolves ticket 8197.
20259 - Introduce a helper function to parse ExitPolicy in
20260 or_options_t structure.
20263 - Add a doc/TUNING document with tips for handling large numbers of
20264 TCP connections when running busy Tor relay. Update the warning
20265 message to point to this file when running out of sockets
20266 operating system is allowing to use simultaneously. Resolves
20269 o Removed features:
20270 - We no longer remind the user about configuration options that have
20271 been obsolete since 0.2.3.x or earlier. Patch by Adrien Bak.
20272 - Remove our old, non-weighted bandwidth-based node selection code.
20273 Previously, we used it as a fallback when we couldn't perform
20274 weighted bandwidth-based node selection. But that would only
20275 happen in the cases where we had no consensus, or when we had a
20276 consensus generated by buggy or ancient directory authorities. In
20277 either case, it's better to use the more modern, better maintained
20278 algorithm, with reasonable defaults for the weights. Closes
20280 - Remove the --disable-curve25519 configure option. Relays and
20281 clients now are required to support curve25519 and the
20283 - The old "StrictEntryNodes" and "StrictExitNodes" options, which
20284 used to be deprecated synonyms for "StrictNodes", are now marked
20285 obsolete. Resolves ticket 12226.
20286 - Clients don't understand the BadDirectory flag in the consensus
20287 anymore, and ignore it.
20290 - Refactor the function that chooses guard nodes so that it can more
20291 easily be tested; write some tests for it.
20292 - Fix and re-enable the fgets_eagain unit test. Fixes bug 12503;
20293 bugfix on 0.2.3.1-alpha. Patch from "cypherpunks."
20294 - Create unit tests for format_time_interval(). With bug 13393.
20295 - Add unit tests for tor_timegm signed overflow, tor_timegm and
20296 parse_rfc1123_time validity checks, correct_tm year clamping. Unit
20297 tests (visible) fixes in bug 13476.
20298 - Add a "coverage-html" make target to generate HTML-visualized
20299 coverage results when building with --enable-coverage. (Requires
20300 lcov.) Patch from Kevin Murray.
20301 - Enable the backtrace handler (where supported) when running the
20303 - Revise all unit tests that used the legacy test_* macros to
20304 instead use the recommended tt_* macros. This patch was generated
20305 with coccinelle, to avoid manual errors. Closes ticket 13119.
20307 o Distribution (systemd):
20308 - systemd unit file: only allow tor to write to /var/lib/tor and
20309 /var/log/tor. The rest of the filesystem is accessible for reading
20310 only. Patch by intrigeri; resolves ticket 12751.
20311 - systemd unit file: ensure that the process and all its children
20312 can never gain new privileges. Patch by intrigeri; resolves
20314 - systemd unit file: set up /var/run/tor as writable for the Tor
20315 service. Patch by intrigeri; resolves ticket 13196.
20317 o Removed features (directory authorities):
20318 - Remove code that prevented authorities from listing Tor relays
20319 affected by CVE-2011-2769 as guards. These relays are already
20320 rejected altogether due to the minimum version requirement of
20321 0.2.3.16-alpha. Closes ticket 13152.
20322 - The "AuthDirRejectUnlisted" option no longer has any effect, as
20323 the fingerprints file (approved-routers) has been deprecated.
20324 - Directory authorities do not support being Naming dirauths anymore.
20325 The "NamingAuthoritativeDir" config option is now obsolete.
20326 - Directory authorities do not support giving out the BadDirectory
20328 - Directory authorities no longer advertise or support consensus
20329 methods 1 through 12 inclusive. These consensus methods were
20330 obsolete and/or insecure: maintaining the ability to support them
20331 served no good purpose. Implements part of proposal 215; closes
20334 o Testing (test-network.sh):
20335 - Stop using "echo -n", as some shells' built-in echo doesn't
20336 support "-n". Instead, use "/bin/echo -n". Partially fixes
20338 - Stop an apparent test-network hang when used with make -j2. Fixes
20340 - Add a --delay option to test-network.sh, which configures the
20341 delay before the chutney network tests for data transmission.
20342 Partially implements ticket 13161.
20345 Changes in version 0.2.5.10 - 2014-10-24
20346 Tor 0.2.5.10 is the first stable release in the 0.2.5 series.
20348 It adds several new security features, including improved
20349 denial-of-service resistance for relays, new compiler hardening
20350 options, and a system-call sandbox for hardened installations on Linux
20351 (requires seccomp2). The controller protocol has several new features,
20352 resolving IPv6 addresses should work better than before, and relays
20353 should be a little more CPU-efficient. We've added support for more
20354 OpenBSD and FreeBSD transparent proxy types. We've improved the build
20355 system and testing infrastructure to allow unit testing of more parts
20356 of the Tor codebase. Finally, we've addressed several nagging pluggable
20357 transport usability issues, and included numerous other small bugfixes
20358 and features mentioned below.
20360 This release marks end-of-life for Tor 0.2.3.x; those Tor versions
20361 have accumulated many known flaws; everyone should upgrade.
20363 o Deprecated versions:
20364 - Tor 0.2.3.x has reached end-of-life; it has received no patches or
20365 attention for some while.
20368 Changes in version 0.2.5.9-rc - 2014-10-20
20369 Tor 0.2.5.9-rc is the third release candidate for the Tor 0.2.5.x
20370 series. It disables SSL3 in response to the recent "POODLE" attack
20371 (even though POODLE does not affect Tor). It also works around a crash
20372 bug caused by some operating systems' response to the "POODLE" attack
20373 (which does affect Tor). It also contains a few miscellaneous fixes.
20375 o Major security fixes:
20376 - Disable support for SSLv3. All versions of OpenSSL in use with Tor
20377 today support TLS 1.0 or later, so we can safely turn off support
20378 for this old (and insecure) protocol. Fixes bug 13426.
20380 o Major bugfixes (openssl bug workaround):
20381 - Avoid crashing when using OpenSSL version 0.9.8zc, 1.0.0o, or
20382 1.0.1j, built with the 'no-ssl3' configuration option. Fixes bug
20383 13471. This is a workaround for an OpenSSL bug.
20386 - Disable the sandbox name resolver cache when running tor-resolve:
20387 tor-resolve doesn't use the sandbox code, and turning it on was
20388 breaking attempts to do tor-resolve on a non-default server on
20389 Linux. Fixes bug 13295; bugfix on 0.2.5.3-alpha.
20391 o Compilation fixes:
20392 - Build and run correctly on systems like OpenBSD-current that have
20393 patched OpenSSL to remove get_cipher_by_char and/or its
20394 implementations. Fixes issue 13325.
20396 o Downgraded warnings:
20397 - Downgrade the severity of the 'unexpected sendme cell from client'
20398 from 'warn' to 'protocol warning'. Closes ticket 8093.
20401 Changes in version 0.2.4.25 - 2014-10-20
20402 Tor 0.2.4.25 disables SSL3 in response to the recent "POODLE" attack
20403 (even though POODLE does not affect Tor). It also works around a crash
20404 bug caused by some operating systems' response to the "POODLE" attack
20405 (which does affect Tor).
20407 o Major security fixes (also in 0.2.5.9-rc):
20408 - Disable support for SSLv3. All versions of OpenSSL in use with Tor
20409 today support TLS 1.0 or later, so we can safely turn off support
20410 for this old (and insecure) protocol. Fixes bug 13426.
20412 o Major bugfixes (openssl bug workaround, also in 0.2.5.9-rc):
20413 - Avoid crashing when using OpenSSL version 0.9.8zc, 1.0.0o, or
20414 1.0.1j, built with the 'no-ssl3' configuration option. Fixes bug
20415 13471. This is a workaround for an OpenSSL bug.
20418 Changes in version 0.2.5.8-rc - 2014-09-22
20419 Tor 0.2.5.8-rc is the second release candidate for the Tor 0.2.5.x
20420 series. It fixes a bug that affects consistency and speed when
20421 connecting to hidden services, and it updates the location of one of
20422 the directory authorities.
20425 - Clients now send the correct address for their chosen rendezvous
20426 point when trying to access a hidden service. They used to send
20427 the wrong address, which would still work some of the time because
20428 they also sent the identity digest of the rendezvous point, and if
20429 the hidden service happened to try connecting to the rendezvous
20430 point from a relay that already had a connection open to it,
20431 the relay would reuse that connection. Now connections to hidden
20432 services should be more robust and faster. Also, this bug meant
20433 that clients were leaking to the hidden service whether they were
20434 on a little-endian (common) or big-endian (rare) system, which for
20435 some users might have reduced their anonymity. Fixes bug 13151;
20436 bugfix on 0.2.1.5-alpha.
20438 o Directory authority changes:
20439 - Change IP address for gabelmoo (v3 directory authority).
20442 Changes in version 0.2.4.24 - 2014-09-22
20443 Tor 0.2.4.24 fixes a bug that affects consistency and speed when
20444 connecting to hidden services, and it updates the location of one of
20445 the directory authorities.
20448 - Clients now send the correct address for their chosen rendezvous
20449 point when trying to access a hidden service. They used to send
20450 the wrong address, which would still work some of the time because
20451 they also sent the identity digest of the rendezvous point, and if
20452 the hidden service happened to try connecting to the rendezvous
20453 point from a relay that already had a connection open to it,
20454 the relay would reuse that connection. Now connections to hidden
20455 services should be more robust and faster. Also, this bug meant
20456 that clients were leaking to the hidden service whether they were
20457 on a little-endian (common) or big-endian (rare) system, which for
20458 some users might have reduced their anonymity. Fixes bug 13151;
20459 bugfix on 0.2.1.5-alpha.
20461 o Directory authority changes:
20462 - Change IP address for gabelmoo (v3 directory authority).
20464 o Minor features (geoip):
20465 - Update geoip and geoip6 to the August 7 2014 Maxmind GeoLite2
20469 Changes in version 0.2.5.7-rc - 2014-09-11
20470 Tor 0.2.5.7-rc fixes several regressions from earlier in the 0.2.5.x
20471 release series, and some long-standing bugs related to ORPort reachability
20472 testing and failure to send CREATE cells. It is the first release
20473 candidate for the Tor 0.2.5.x series.
20475 o Major bugfixes (client, startup):
20476 - Start making circuits as soon as DisabledNetwork is turned off.
20477 When Tor started with DisabledNetwork set, it would correctly
20478 conclude that it shouldn't build circuits, but it would mistakenly
20479 cache this conclusion, and continue believing it even when
20480 DisableNetwork is set to 0. Fixes the bug introduced by the fix
20481 for bug 11200; bugfix on 0.2.5.4-alpha.
20482 - Resume expanding abbreviations for command-line options. The fix
20483 for bug 4647 accidentally removed our hack from bug 586 that
20484 rewrote HashedControlPassword to __HashedControlSessionPassword
20485 when it appears on the commandline (which allowed the user to set
20486 her own HashedControlPassword in the torrc file while the
20487 controller generates a fresh session password for each run). Fixes
20488 bug 12948; bugfix on 0.2.5.1-alpha.
20489 - Warn about attempts to run hidden services and relays in the same
20490 process: that's probably not a good idea. Closes ticket 12908.
20492 o Major bugfixes (relay):
20493 - Avoid queuing or sending destroy cells for circuit ID zero when we
20494 fail to send a CREATE cell. Fixes bug 12848; bugfix on 0.0.8pre1.
20495 Found and fixed by "cypherpunks".
20496 - Fix ORPort reachability detection on relays running behind a
20497 proxy, by correctly updating the "local" mark on the controlling
20498 channel when changing the address of an or_connection_t after the
20499 handshake. Fixes bug 12160; bugfix on 0.2.4.4-alpha.
20501 o Minor features (bridge):
20502 - Add an ExtORPortCookieAuthFileGroupReadable option to make the
20503 cookie file for the ExtORPort g+r by default.
20505 o Minor features (geoip):
20506 - Update geoip and geoip6 to the August 7 2014 Maxmind GeoLite2
20509 o Minor bugfixes (logging):
20510 - Reduce the log severity of the "Pluggable transport proxy does not
20511 provide any needed transports and will not be launched." message,
20512 since Tor Browser includes several ClientTransportPlugin lines in
20513 its torrc-defaults file, leading every Tor Browser user who looks
20514 at her logs to see these notices and wonder if they're dangerous.
20515 Resolves bug 13124; bugfix on 0.2.5.3-alpha.
20516 - Downgrade "Unexpected onionskin length after decryption" warning
20517 to a protocol-warn, since there's nothing relay operators can do
20518 about a client that sends them a malformed create cell. Resolves
20519 bug 12996; bugfix on 0.0.6rc1.
20520 - Log more specific warnings when we get an ESTABLISH_RENDEZVOUS
20521 cell on a cannibalized or non-OR circuit. Resolves ticket 12997.
20522 - When logging information about an EXTEND2 or EXTENDED2 cell, log
20523 their names correctly. Fixes part of bug 12700; bugfix
20525 - When logging information about a relay cell whose command we don't
20526 recognize, log its command as an integer. Fixes part of bug 12700;
20527 bugfix on 0.2.1.10-alpha.
20528 - Escape all strings from the directory connection before logging
20529 them. Fixes bug 13071; bugfix on 0.1.1.15. Patch from "teor".
20531 o Minor bugfixes (controller):
20532 - Restore the functionality of CookieAuthFileGroupReadable. Fixes
20533 bug 12864; bugfix on 0.2.5.1-alpha.
20534 - Actually send TRANSPORT_LAUNCHED and HS_DESC events to
20535 controllers. Fixes bug 13085; bugfix on 0.2.5.1-alpha. Patch
20538 o Minor bugfixes (compilation):
20539 - Fix compilation of test.h with MSVC. Patch from Gisle Vanem;
20540 bugfix on 0.2.5.5-alpha.
20541 - Make the nmake make files work again. Fixes bug 13081. Bugfix on
20542 0.2.5.1-alpha. Patch from "NewEraCracker".
20543 - In routerlist_assert_ok(), don't take the address of a
20544 routerinfo's cache_info member unless that routerinfo is non-NULL.
20545 Fixes bug 13096; bugfix on 0.1.1.9-alpha. Patch by "teor".
20546 - Fix a large number of false positive warnings from the clang
20547 analyzer static analysis tool. This should make real warnings
20548 easier for clang analyzer to find. Patch from "teor". Closes
20551 o Distribution (systemd):
20552 - Verify configuration file via ExecStartPre in the systemd unit
20553 file. Patch from intrigeri; resolves ticket 12730.
20554 - Explicitly disable RunAsDaemon in the systemd unit file. Our
20555 current systemd unit uses "Type = simple", so systemd does not
20556 expect tor to fork. If the user has "RunAsDaemon 1" in their
20557 torrc, then things won't work as expected. This is e.g. the case
20558 on Debian (and derivatives), since there we pass "--defaults-torrc
20559 /usr/share/tor/tor-service-defaults-torrc" (that contains
20560 "RunAsDaemon 1") by default. Patch by intrigeri; resolves
20564 - Adjust the URLs in the README to refer to the new locations of
20565 several documents on the website. Fixes bug 12830. Patch from
20567 - Document 'reject6' and 'accept6' ExitPolicy entries. Resolves
20571 Changes in version 0.2.5.6-alpha - 2014-07-28
20572 Tor 0.2.5.6-alpha brings us a big step closer to slowing down the
20573 risk from guard rotation, and fixes a variety of other issues to get
20574 us closer to a release candidate.
20576 o Major features (also in 0.2.4.23):
20577 - Make the number of entry guards configurable via a new
20578 NumEntryGuards consensus parameter, and the number of directory
20579 guards configurable via a new NumDirectoryGuards consensus
20580 parameter. Implements ticket 12688.
20582 o Major bugfixes (also in 0.2.4.23):
20583 - Fix a bug in the bounds-checking in the 32-bit curve25519-donna
20584 implementation that caused incorrect results on 32-bit
20585 implementations when certain malformed inputs were used along with
20586 a small class of private ntor keys. This bug does not currently
20587 appear to allow an attacker to learn private keys or impersonate a
20588 Tor server, but it could provide a means to distinguish 32-bit Tor
20589 implementations from 64-bit Tor implementations. Fixes bug 12694;
20590 bugfix on 0.2.4.8-alpha. Bug found by Robert Ransom; fix from
20594 - Perform circuit cleanup operations even when circuit
20595 construction operations are disabled (because the network is
20596 disabled, or because there isn't enough directory information).
20597 Previously, when we were not building predictive circuits, we
20598 were not closing expired circuits either. Fixes bug 8387; bugfix on
20599 0.1.1.11-alpha. This bug became visible in 0.2.4.10-alpha when we
20600 became more strict about when we have "enough directory information
20601 to build circuits".
20604 - Authorities now assign the Guard flag to the fastest 25% of the
20605 network (it used to be the fastest 50%). Also raise the consensus
20606 weight that guarantees the Guard flag from 250 to 2000. For the
20607 current network, this results in about 1100 guards, down from 2500.
20608 This step paves the way for moving the number of entry guards
20609 down to 1 (proposal 236) while still providing reasonable expected
20610 performance for most users. Implements ticket 12690.
20611 - Update geoip and geoip6 to the July 10 2014 Maxmind GeoLite2
20613 - Slightly enhance the diagnostic message for bug 12184.
20615 o Minor bugfixes (also in 0.2.4.23):
20616 - Warn and drop the circuit if we receive an inbound 'relay early'
20617 cell. Those used to be normal to receive on hidden service circuits
20618 due to bug 1038, but the buggy Tor versions are long gone from
20619 the network so we can afford to resume watching for them. Resolves
20620 the rest of bug 1038; bugfix on 0.2.1.19.
20621 - Correct a confusing error message when trying to extend a circuit
20622 via the control protocol but we don't know a descriptor or
20623 microdescriptor for one of the specified relays. Fixes bug 12718;
20624 bugfix on 0.2.3.1-alpha.
20627 - Fix compilation when building with bufferevents enabled. (This
20628 configuration is still not expected to work, however.)
20629 Fixes bugs 12438, 12474, 11578; bugfixes on 0.2.5.1-alpha and
20630 0.2.5.3-alpha. Patches from Anthony G. Basile and Sathyanarayanan
20632 - Compile correctly with builds and forks of OpenSSL (such as
20633 LibreSSL) that disable compression. Fixes bug 12602; bugfix on
20634 0.2.1.1-alpha. Patch from "dhill".
20637 Changes in version 0.2.4.23 - 2014-07-28
20638 Tor 0.2.4.23 brings us a big step closer to slowing down the risk from
20639 guard rotation, and also backports several important fixes from the
20640 Tor 0.2.5 alpha release series.
20643 - Clients now look at the "usecreatefast" consensus parameter to
20644 decide whether to use CREATE_FAST or CREATE cells for the first hop
20645 of their circuit. This approach can improve security on connections
20646 where Tor's circuit handshake is stronger than the available TLS
20647 connection security levels, but the tradeoff is more computational
20648 load on guard relays. Implements proposal 221. Resolves ticket 9386.
20649 - Make the number of entry guards configurable via a new
20650 NumEntryGuards consensus parameter, and the number of directory
20651 guards configurable via a new NumDirectoryGuards consensus
20652 parameter. Implements ticket 12688.
20655 - Fix a bug in the bounds-checking in the 32-bit curve25519-donna
20656 implementation that caused incorrect results on 32-bit
20657 implementations when certain malformed inputs were used along with
20658 a small class of private ntor keys. This bug does not currently
20659 appear to allow an attacker to learn private keys or impersonate a
20660 Tor server, but it could provide a means to distinguish 32-bit Tor
20661 implementations from 64-bit Tor implementations. Fixes bug 12694;
20662 bugfix on 0.2.4.8-alpha. Bug found by Robert Ransom; fix from
20666 - Warn and drop the circuit if we receive an inbound 'relay early'
20667 cell. Those used to be normal to receive on hidden service circuits
20668 due to bug 1038, but the buggy Tor versions are long gone from
20669 the network so we can afford to resume watching for them. Resolves
20670 the rest of bug 1038; bugfix on 0.2.1.19.
20671 - Correct a confusing error message when trying to extend a circuit
20672 via the control protocol but we don't know a descriptor or
20673 microdescriptor for one of the specified relays. Fixes bug 12718;
20674 bugfix on 0.2.3.1-alpha.
20675 - Avoid an illegal read from stack when initializing the TLS
20676 module using a version of OpenSSL without all of the ciphers
20677 used by the v2 link handshake. Fixes bug 12227; bugfix on
20678 0.2.4.8-alpha. Found by "starlight".
20681 - Update geoip and geoip6 to the July 10 2014 Maxmind GeoLite2
20685 Changes in version 0.2.5.5-alpha - 2014-06-18
20686 Tor 0.2.5.5-alpha fixes a wide variety of remaining issues in the Tor
20687 0.2.5.x release series, including a couple of DoS issues, some
20688 performance regressions, a large number of bugs affecting the Linux
20689 seccomp2 sandbox code, and various other bugfixes. It also adds
20690 diagnostic bugfixes for a few tricky issues that we're trying to
20693 o Major features (security, traffic analysis resistance):
20694 - Several major improvements to the algorithm used to decide when to
20695 close TLS connections. Previous versions of Tor closed connections
20696 at a fixed interval after the last time a non-padding cell was
20697 sent over the connection, regardless of the target of the
20698 connection. Now, we randomize the intervals by adding up to 50% of
20699 their base value, we measure the length of time since connection
20700 last had at least one circuit, and we allow connections to known
20701 ORs to remain open a little longer (15 minutes instead of 3
20702 minutes minimum). These changes should improve Tor's resistance
20703 against some kinds of traffic analysis, and lower some overhead
20704 from needlessly closed connections. Fixes ticket 6799.
20705 Incidentally fixes ticket 12023; bugfix on 0.2.5.1-alpha.
20707 o Major bugfixes (security, OOM, new since 0.2.5.4-alpha, also in 0.2.4.22):
20708 - Fix a memory leak that could occur if a microdescriptor parse
20709 fails during the tokenizing step. This bug could enable a memory
20710 exhaustion attack by directory servers. Fixes bug 11649; bugfix
20713 o Major bugfixes (security, directory authorities):
20714 - Directory authorities now include a digest of each relay's
20715 identity key as a part of its microdescriptor.
20717 This is a workaround for bug 11743 (reported by "cypherpunks"),
20718 where Tor clients do not support receiving multiple
20719 microdescriptors with the same SHA256 digest in the same
20720 consensus. When clients receive a consensus like this, they only
20721 use one of the relays. Without this fix, a hostile relay could
20722 selectively disable some client use of target relays by
20723 constructing a router descriptor with a different identity and the
20724 same microdescriptor parameters and getting the authorities to
20725 list it in a microdescriptor consensus. This fix prevents an
20726 attacker from causing a microdescriptor collision, because the
20727 router's identity is not forgeable.
20729 o Major bugfixes (relay):
20730 - Use a direct dirport connection when uploading non-anonymous
20731 descriptors to the directory authorities. Previously, relays would
20732 incorrectly use tunnel connections under a fairly wide variety of
20733 circumstances. Fixes bug 11469; bugfix on 0.2.4.3-alpha.
20734 - When a circuit accidentally has the same circuit ID for its
20735 forward and reverse direction, correctly detect the direction of
20736 cells using that circuit. Previously, this bug made roughly one
20737 circuit in a million non-functional. Fixes bug 12195; this is a
20738 bugfix on every version of Tor.
20740 o Major bugfixes (client, pluggable transports):
20741 - When managing pluggable transports, use OS notification facilities
20742 to learn if they have crashed, and don't attempt to kill any
20743 process that has already exited. Fixes bug 8746; bugfix
20746 o Minor features (diagnostic):
20747 - When logging a warning because of bug 7164, additionally check the
20748 hash table for consistency (as proposed on ticket 11737). This may
20749 help diagnose bug 7164.
20750 - When we log a heartbeat, log how many one-hop circuits we have
20751 that are at least 30 minutes old, and log status information about
20752 a few of them. This is an attempt to track down bug 8387.
20753 - When encountering an unexpected CR while writing text to a file on
20754 Windows, log the name of the file. Should help diagnosing
20756 - Give more specific warnings when a client notices that an onion
20757 handshake has failed. Fixes ticket 9635.
20758 - Add significant new logging code to attempt to diagnose bug 12184,
20759 where relays seem to run out of available circuit IDs.
20760 - Improve the diagnostic log message for bug 8387 even further to
20761 try to improve our odds of figuring out why one-hop directory
20762 circuits sometimes do not get closed.
20764 o Minor features (security, memory management):
20765 - Memory allocation tricks (mempools and buffer freelists) are now
20766 disabled by default. You can turn them back on with
20767 --enable-mempools and --enable-buf-freelists respectively. We're
20768 disabling these features because malloc performance is good enough
20769 on most platforms, and a similar feature in OpenSSL exacerbated
20770 exploitation of the Heartbleed attack. Resolves ticket 11476.
20772 o Minor features (security):
20773 - Apply the secure SipHash-2-4 function to the hash table mapping
20774 circuit IDs and channels to circuits. We missed this one when we
20775 were converting all the other hash functions to use SipHash back
20776 in 0.2.5.3-alpha. Resolves ticket 11750.
20778 o Minor features (build):
20779 - The configure script has a --disable-seccomp option to turn off
20780 support for libseccomp on systems that have it, in case it (or
20781 Tor's use of it) is broken. Resolves ticket 11628.
20783 o Minor features (other):
20784 - Update geoip and geoip6 to the June 4 2014 Maxmind GeoLite2
20787 o Minor bugfixes (security, new since 0.2.5.4-alpha, also in 0.2.4.22):
20788 - When running a hidden service, do not allow TunneledDirConns 0;
20789 this will keep the hidden service from running, and also
20790 make it publish its descriptors directly over HTTP. Fixes bug 10849;
20791 bugfix on 0.2.1.1-alpha.
20793 o Minor bugfixes (performance):
20794 - Avoid a bug where every successful connection made us recompute
20795 the flag telling us whether we have sufficient information to
20796 build circuits. Previously, we would forget our cached value
20797 whenever we successfully opened a channel (or marked a router as
20798 running or not running for any other reason), regardless of
20799 whether we had previously believed the router to be running. This
20800 forced us to run an expensive update operation far too often.
20801 Fixes bug 12170; bugfix on 0.1.2.1-alpha.
20802 - Avoid using tor_memeq() for checking relay cell integrity. This
20803 removes a possible performance bottleneck. Fixes part of bug
20804 12169; bugfix on 0.2.1.31.
20806 o Minor bugfixes (compilation):
20807 - Fix compilation of test_status.c when building with MVSC. Bugfix
20808 on 0.2.5.4-alpha. Patch from Gisle Vanem.
20809 - Resolve GCC complaints on OpenBSD about discarding constness in
20810 TO_{ORIGIN,OR}_CIRCUIT functions. Fixes part of bug 11633; bugfix
20811 on 0.1.1.23. Patch from Dana Koch.
20812 - Resolve clang complaints on OpenBSD with -Wshorten-64-to-32 due to
20813 treatment of long and time_t as comparable types. Fixes part of
20814 bug 11633. Patch from Dana Koch.
20815 - Make Tor compile correctly with --disable-buf-freelists. Fixes bug
20816 11623; bugfix on 0.2.5.3-alpha.
20817 - When deciding whether to build the 64-bit curve25519
20818 implementation, detect platforms where we can compile 128-bit
20819 arithmetic but cannot link it. Fixes bug 11729; bugfix on
20820 0.2.4.8-alpha. Patch from "conradev".
20821 - Fix compilation when DNS_CACHE_DEBUG is enabled. Fixes bug 11761;
20822 bugfix on 0.2.3.13-alpha. Found by "cypherpunks".
20823 - Fix compilation with dmalloc. Fixes bug 11605; bugfix
20826 o Minor bugfixes (Directory server):
20827 - When sending a compressed set of descriptors or microdescriptors,
20828 make sure to finalize the zlib stream. Previously, we would write
20829 all the compressed data, but if the last descriptor we wanted to
20830 send was missing or too old, we would not mark the stream as
20831 finished. This caused problems for decompression tools. Fixes bug
20832 11648; bugfix on 0.1.1.23.
20834 o Minor bugfixes (Linux seccomp sandbox):
20835 - Make the seccomp sandbox code compile under ARM Linux. Fixes bug
20836 11622; bugfix on 0.2.5.1-alpha.
20837 - Avoid crashing when re-opening listener ports with the seccomp
20838 sandbox active. Fixes bug 12115; bugfix on 0.2.5.1-alpha.
20839 - Avoid crashing with the seccomp sandbox enabled along with
20840 ConstrainedSockets. Fixes bug 12139; bugfix on 0.2.5.1-alpha.
20841 - When we receive a SIGHUP with the sandbox enabled, correctly
20842 support rotating our log files. Fixes bug 12032; bugfix
20844 - Avoid crash when running with sandboxing enabled and
20845 DirReqStatistics not disabled. Fixes bug 12035; bugfix
20847 - Fix a "BUG" warning when trying to write bridge-stats files with
20848 the Linux syscall sandbox filter enabled. Fixes bug 12041; bugfix
20850 - Prevent the sandbox from crashing on startup when run with the
20851 --enable-expensive-hardening configuration option. Fixes bug
20852 11477; bugfix on 0.2.5.4-alpha.
20853 - When running with DirPortFrontPage and sandboxing both enabled,
20854 reload the DirPortFrontPage correctly when restarting. Fixes bug
20855 12028; bugfix on 0.2.5.1-alpha.
20856 - Don't try to enable the sandbox when using the Tor binary to check
20857 its configuration, hash a passphrase, or so on. Doing so was
20858 crashing on startup for some users. Fixes bug 11609; bugfix
20860 - Avoid warnings when running with sandboxing and node statistics
20861 enabled at the same time. Fixes part of 12064; bugfix on
20862 0.2.5.1-alpha. Patch from Michael Wolf.
20863 - Avoid warnings when running with sandboxing enabled at the same
20864 time as cookie authentication, hidden services, or directory
20865 authority voting. Fixes part of 12064; bugfix on 0.2.5.1-alpha.
20866 - Do not allow options that require calls to exec to be enabled
20867 alongside the seccomp2 sandbox: they will inevitably crash. Fixes
20868 bug 12043; bugfix on 0.2.5.1-alpha.
20869 - Handle failures in getpwnam()/getpwuid() when running with the
20870 User option set and the Linux syscall sandbox enabled. Fixes bug
20871 11946; bugfix on 0.2.5.1-alpha.
20872 - Refactor the getaddrinfo workaround that the seccomp sandbox uses
20873 to avoid calling getaddrinfo() after installing the sandbox
20874 filters. Previously, it preloaded a cache with the IPv4 address
20875 for our hostname, and nothing else. Now, it loads the cache with
20876 every address that it used to initialize the Tor process. Fixes
20877 bug 11970; bugfix on 0.2.5.1-alpha.
20879 o Minor bugfixes (pluggable transports):
20880 - Enable the ExtORPortCookieAuthFile option, to allow changing the
20881 default location of the authentication token for the extended OR
20882 Port as used by sever-side pluggable transports. We had
20883 implemented this option before, but the code to make it settable
20884 had been omitted. Fixes bug 11635; bugfix on 0.2.5.1-alpha.
20885 - Avoid another 60-second delay when starting Tor in a pluggable-
20886 transport-using configuration when we already have cached
20887 descriptors for our bridges. Fixes bug 11965; bugfix
20890 o Minor bugfixes (client):
20891 - Avoid "Tried to open a socket with DisableNetwork set" warnings
20892 when starting a client with bridges configured and DisableNetwork
20893 set. (Tor launcher starts Tor with DisableNetwork set the first
20894 time it runs.) Fixes bug 10405; bugfix on 0.2.3.9-alpha.
20896 o Minor bugfixes (testing):
20897 - The Python parts of the test scripts now work on Python 3 as well
20898 as Python 2, so systems where '/usr/bin/python' is Python 3 will
20899 no longer have the tests break. Fixes bug 11608; bugfix
20901 - When looking for versions of python that we could run the tests
20902 with, check for "python2.7" and "python3.3"; previously we were
20903 only looking for "python", "python2", and "python3". Patch from
20904 Dana Koch. Fixes bug 11632; bugfix on 0.2.5.2-alpha.
20905 - Fix all valgrind warnings produced by the unit tests. There were
20906 over a thousand memory leak warnings previously, mostly produced
20907 by forgetting to free things in the unit test code. Fixes bug
20908 11618, bugfixes on many versions of Tor.
20910 o Minor bugfixes (tor-fw-helper):
20911 - Give a correct log message when tor-fw-helper fails to launch.
20912 (Previously, we would say something like "tor-fw-helper sent us a
20913 string we could not parse".) Fixes bug 9781; bugfix
20916 o Minor bugfixes (relay, threading):
20917 - Check return code on spawn_func() in cpuworker code, so that we
20918 don't think we've spawned a nonworking cpuworker and write junk to
20919 it forever. Fix related to bug 4345; bugfix on all released Tor
20920 versions. Found by "skruffy".
20921 - Use a pthread_attr to make sure that spawn_func() cannot return an
20922 error while at the same time launching a thread. Fix related to
20923 bug 4345; bugfix on all released Tor versions. Reported
20926 o Minor bugfixes (relay, oom prevention):
20927 - Correctly detect the total available system memory. We tried to do
20928 this in 0.2.5.4-alpha, but the code was set up to always return an
20929 error value, even on success. Fixes bug 11805; bugfix
20932 o Minor bugfixes (relay, other):
20933 - We now drop CREATE cells for already-existent circuit IDs and for
20934 zero-valued circuit IDs, regardless of other factors that might
20935 otherwise have called for DESTROY cells. Fixes bug 12191; bugfix
20937 - Avoid an illegal read from stack when initializing the TLS module
20938 using a version of OpenSSL without all of the ciphers used by the
20939 v2 link handshake. Fixes bug 12227; bugfix on 0.2.4.8-alpha. Found
20941 - When rejecting DATA cells for stream_id zero, still count them
20942 against the circuit's deliver window so that we don't fail to send
20943 a SENDME. Fixes bug 11246; bugfix on 0.2.4.10-alpha.
20945 o Minor bugfixes (logging):
20946 - Fix a misformatted log message about delayed directory fetches.
20947 Fixes bug 11654; bugfix on 0.2.5.3-alpha.
20948 - Squelch a spurious LD_BUG message "No origin circuit for
20949 successful SOCKS stream" in certain hidden service failure cases;
20953 - Include a tor.service file in contrib/dist for use with systemd.
20954 Some distributions will be able to use this file unmodified;
20955 others will need to tweak it, or write their own. Patch from Jamie
20956 Nguyen; resolves ticket 8368.
20959 - Clean up several option names in the manpage to match their real
20960 names, add the missing documentation for a couple of testing and
20961 directory authority options, remove the documentation for a
20962 V2-directory fetching option that no longer exists. Resolves
20964 - Correct the documentation so that it lists the correct directory
20965 for the stats files. (They are in a subdirectory called "stats",
20967 - In the manpage, move more authority-only options into the
20968 directory authority section so that operators of regular directory
20969 caches don't get confused.
20972 - The contrib directory has been sorted and tidied. Before, it was
20973 an unsorted dumping ground for useful and not-so-useful things.
20974 Now, it is divided based on functionality, and the items which
20975 seemed to be nonfunctional or useless have been removed. Resolves
20976 ticket 8966; based on patches from "rl1987".
20979 - Remove /tor/dbg-stability.txt URL that was meant to help debug WFU
20980 and MTBF calculations, but that nobody was using. Fixes ticket 11742.
20981 - The TunnelDirConns and PreferTunnelledDirConns options no longer
20982 exist; tunneled directory connections have been available since
20983 0.1.2.5-alpha, and turning them off is not a good idea. This is a
20984 brute-force fix for 10849, where "TunnelDirConns 0" would break
20988 Changes in version 0.2.4.22 - 2014-05-16
20989 Tor 0.2.4.22 backports numerous high-priority fixes from the Tor 0.2.5
20990 alpha release series. These include blocking all authority signing
20991 keys that may have been affected by the OpenSSL "heartbleed" bug,
20992 choosing a far more secure set of TLS ciphersuites by default, closing
20993 a couple of memory leaks that could be used to run a target relay out
20994 of RAM, and several others.
20996 o Major features (security, backport from 0.2.5.4-alpha):
20997 - Block authority signing keys that were used on authorities
20998 vulnerable to the "heartbleed" bug in OpenSSL (CVE-2014-0160). (We
20999 don't have any evidence that these keys _were_ compromised; we're
21000 doing this to be prudent.) Resolves ticket 11464.
21002 o Major bugfixes (security, OOM):
21003 - Fix a memory leak that could occur if a microdescriptor parse
21004 fails during the tokenizing step. This bug could enable a memory
21005 exhaustion attack by directory servers. Fixes bug 11649; bugfix
21008 o Major bugfixes (TLS cipher selection, backport from 0.2.5.4-alpha):
21009 - The relay ciphersuite list is now generated automatically based on
21010 uniform criteria, and includes all OpenSSL ciphersuites with
21011 acceptable strength and forward secrecy. Previously, we had left
21012 some perfectly fine ciphersuites unsupported due to omission or
21013 typo. Resolves bugs 11513, 11492, 11498, 11499. Bugs reported by
21014 'cypherpunks'. Bugfix on 0.2.4.8-alpha.
21015 - Relays now trust themselves to have a better view than clients of
21016 which TLS ciphersuites are better than others. (Thanks to bug
21017 11513, the relay list is now well-considered, whereas the client
21018 list has been chosen mainly for anti-fingerprinting purposes.)
21019 Relays prefer: AES over 3DES; then ECDHE over DHE; then GCM over
21020 CBC; then SHA384 over SHA256 over SHA1; and last, AES256 over
21021 AES128. Resolves ticket 11528.
21022 - Clients now try to advertise the same list of ciphersuites as
21023 Firefox 28. This change enables selection of (fast) GCM
21024 ciphersuites, disables some strange old ciphers, and stops
21025 advertising the ECDH (not to be confused with ECDHE) ciphersuites.
21026 Resolves ticket 11438.
21028 o Minor bugfixes (configuration, security):
21029 - When running a hidden service, do not allow TunneledDirConns 0:
21030 trying to set that option together with a hidden service would
21031 otherwise prevent the hidden service from running, and also make
21032 it publish its descriptors directly over HTTP. Fixes bug 10849;
21033 bugfix on 0.2.1.1-alpha.
21035 o Minor bugfixes (controller, backport from 0.2.5.4-alpha):
21036 - Avoid sending a garbage value to the controller when a circuit is
21037 cannibalized. Fixes bug 11519; bugfix on 0.2.3.11-alpha.
21039 o Minor bugfixes (exit relay, backport from 0.2.5.4-alpha):
21040 - Stop leaking memory when we successfully resolve a PTR record.
21041 Fixes bug 11437; bugfix on 0.2.4.7-alpha.
21043 o Minor bugfixes (bridge client, backport from 0.2.5.4-alpha):
21044 - Avoid 60-second delays in the bootstrapping process when Tor is
21045 launching for a second time while using bridges. Fixes bug 9229;
21046 bugfix on 0.2.0.3-alpha.
21048 o Minor bugfixes (relays and bridges, backport from 0.2.5.4-alpha):
21049 - Give the correct URL in the warning message when trying to run a
21050 relay on an ancient version of Windows. Fixes bug 9393.
21052 o Minor bugfixes (compilation):
21053 - Fix a compilation error when compiling with --disable-curve25519.
21054 Fixes bug 9700; bugfix on 0.2.4.17-rc.
21057 - Downgrade the warning severity for the the "md was still
21058 referenced 1 node(s)" warning. Tor 0.2.5.4-alpha has better code
21059 for trying to diagnose this bug, and the current warning in
21060 earlier versions of tor achieves nothing useful. Addresses warning
21063 o Minor features (log verbosity, backport from 0.2.5.4-alpha):
21064 - When we run out of usable circuit IDs on a channel, log only one
21065 warning for the whole channel, and describe how many circuits
21066 there were on the channel. Fixes part of ticket 11553.
21068 o Minor features (security, backport from 0.2.5.4-alpha):
21069 - Decrease the lower limit of MaxMemInCellQueues to 256 MBytes (but
21070 leave the default at 8GBytes), to better support Raspberry Pi
21071 users. Fixes bug 9686; bugfix on 0.2.4.14-alpha.
21073 o Documentation (backport from 0.2.5.4-alpha):
21074 - Correctly document that we search for a system torrc file before
21075 looking in ~/.torrc. Fixes documentation side of 9213; bugfix on
21079 Changes in version 0.2.5.4-alpha - 2014-04-25
21080 Tor 0.2.5.4-alpha includes several security and performance
21081 improvements for clients and relays, including blacklisting authority
21082 signing keys that were used while susceptible to the OpenSSL
21083 "heartbleed" bug, fixing two expensive functions on busy relays,
21084 improved TLS ciphersuite preference lists, support for run-time
21085 hardening on compilers that support AddressSanitizer, and more work on
21086 the Linux sandbox code.
21088 There are also several usability fixes for clients (especially clients
21089 that use bridges), two new TransPort protocols supported (one on
21090 OpenBSD, one on FreeBSD), and various other bugfixes.
21092 This release marks end-of-life for Tor 0.2.2.x; those Tor versions
21093 have accumulated many known flaws; everyone should upgrade.
21095 o Major features (security):
21096 - If you don't specify MaxMemInQueues yourself, Tor now tries to
21097 pick a good value based on your total system memory. Previously,
21098 the default was always 8 GB. You can still override the default by
21099 setting MaxMemInQueues yourself. Resolves ticket 11396.
21100 - Block authority signing keys that were used on authorities
21101 vulnerable to the "heartbleed" bug in OpenSSL (CVE-2014-0160). (We
21102 don't have any evidence that these keys _were_ compromised; we're
21103 doing this to be prudent.) Resolves ticket 11464.
21105 o Major features (relay performance):
21106 - Speed up server-side lookups of rendezvous and introduction point
21107 circuits by using hashtables instead of linear searches. These
21108 functions previously accounted between 3 and 7% of CPU usage on
21109 some busy relays. Resolves ticket 9841.
21110 - Avoid wasting CPU when extending a circuit over a channel that is
21111 nearly out of circuit IDs. Previously, we would do a linear scan
21112 over possible circuit IDs before finding one or deciding that we
21113 had exhausted our possibilities. Now, we try at most 64 random
21114 circuit IDs before deciding that we probably won't succeed. Fixes
21115 a possible root cause of ticket 11553.
21117 o Major features (seccomp2 sandbox, Linux only):
21118 - The seccomp2 sandbox can now run a test network for multiple hours
21119 without crashing. The sandbox is still experimental, and more bugs
21120 will probably turn up. To try it, enable "Sandbox 1" on a Linux
21121 host. Resolves ticket 11351.
21122 - Strengthen sandbox code: the sandbox can now test the arguments
21123 for rename(), and blocks _sysctl() entirely. Resolves another part
21125 - When the sandbox blocks a system call, it now tries to log a stack
21126 trace before exiting. Resolves ticket 11465.
21128 o Major bugfixes (TLS cipher selection):
21129 - The relay ciphersuite list is now generated automatically based on
21130 uniform criteria, and includes all OpenSSL ciphersuites with
21131 acceptable strength and forward secrecy. Previously, we had left
21132 some perfectly fine ciphersuites unsupported due to omission or
21133 typo. Resolves bugs 11513, 11492, 11498, 11499. Bugs reported by
21134 'cypherpunks'. Bugfix on 0.2.4.8-alpha.
21135 - Relays now trust themselves to have a better view than clients of
21136 which TLS ciphersuites are better than others. (Thanks to bug
21137 11513, the relay list is now well-considered, whereas the client
21138 list has been chosen mainly for anti-fingerprinting purposes.)
21139 Relays prefer: AES over 3DES; then ECDHE over DHE; then GCM over
21140 CBC; then SHA384 over SHA256 over SHA1; and last, AES256 over
21141 AES128. Resolves ticket 11528.
21142 - Clients now try to advertise the same list of ciphersuites as
21143 Firefox 28. This change enables selection of (fast) GCM
21144 ciphersuites, disables some strange old ciphers, and stops
21145 advertising the ECDH (not to be confused with ECDHE) ciphersuites.
21146 Resolves ticket 11438.
21148 o Major bugfixes (bridge client):
21149 - Avoid 60-second delays in the bootstrapping process when Tor is
21150 launching for a second time while using bridges. Fixes bug 9229;
21151 bugfix on 0.2.0.3-alpha.
21153 o Minor features (transparent proxy, *BSD):
21154 - Support FreeBSD's ipfw firewall interface for TransPort ports on
21155 FreeBSD. To enable it, set "TransProxyType ipfw". Resolves ticket
21156 10267; patch from "yurivict".
21157 - Support OpenBSD's divert-to rules with the pf firewall for
21158 transparent proxy ports. To enable it, set "TransProxyType
21159 pf-divert". This allows Tor to run a TransPort transparent proxy
21160 port on OpenBSD 4.4 or later without root privileges. See the
21161 pf.conf(5) manual page for information on configuring pf to use
21162 divert-to rules. Closes ticket 10896; patch from Dana Koch.
21164 o Minor features (security):
21165 - New --enable-expensive-hardening option to enable security
21166 hardening options that consume nontrivial amounts of CPU and
21167 memory. Right now, this includes AddressSanitizer and UbSan, which
21168 are supported in newer versions of GCC and Clang. Closes ticket
21171 o Minor features (log verbosity):
21172 - Demote the message that we give when a flushing connection times
21173 out for too long from NOTICE to INFO. It was usually meaningless.
21174 Resolves ticket 5286.
21175 - Don't log so many notice-level bootstrapping messages at startup
21176 about downloading descriptors. Previously, we'd log a notice
21177 whenever we learned about more routers. Now, we only log a notice
21178 at every 5% of progress. Fixes bug 9963.
21179 - Warn less verbosely when receiving a malformed
21180 ESTABLISH_RENDEZVOUS cell. Fixes ticket 11279.
21181 - When we run out of usable circuit IDs on a channel, log only one
21182 warning for the whole channel, and describe how many circuits
21183 there were on the channel. Fixes part of ticket 11553.
21185 o Minor features (relay):
21186 - If a circuit timed out for at least 3 minutes, check if we have a
21187 new external IP address, and publish a new descriptor with the new
21188 IP address if it changed. Resolves ticket 2454.
21190 o Minor features (controller):
21191 - Make the entire exit policy available from the control port via
21192 GETINFO exit-policy/*. Implements enhancement 7952. Patch from
21194 - Because of the fix for ticket 11396, the real limit for memory
21195 usage may no longer match the configured MaxMemInQueues value. The
21196 real limit is now exposed via GETINFO limits/max-mem-in-queues.
21198 o Minor features (bridge client):
21199 - Report a more useful failure message when we can't connect to a
21200 bridge because we don't have the right pluggable transport
21201 configured. Resolves ticket 9665. Patch from Fábio J. Bertinatto.
21203 o Minor features (diagnostic):
21204 - Add more log messages to diagnose bug 7164, which causes
21205 intermittent "microdesc_free() called but md was still referenced"
21206 warnings. We now include more information, to figure out why we
21207 might be cleaning a microdescriptor for being too old if it's
21208 still referenced by a live node_t object.
21210 o Minor bugfixes (client, DNSPort):
21211 - When using DNSPort, try to respond to AAAA requests with AAAA
21212 answers. Previously, we hadn't looked at the request type when
21213 deciding which answer type to prefer. Fixes bug 10468; bugfix on
21215 - When receiving a DNS query for an unsupported record type, reply
21216 with no answer rather than with a NOTIMPL error. This behavior
21217 isn't correct either, but it will break fewer client programs, we
21218 hope. Fixes bug 10268; bugfix on 0.2.0.1-alpha. Original patch
21221 o Minor bugfixes (exit relay):
21222 - Stop leaking memory when we successfully resolve a PTR record.
21223 Fixes bug 11437; bugfix on 0.2.4.7-alpha.
21225 o Minor bugfixes (bridge client):
21226 - Stop accepting bridge lines containing hostnames. Doing so would
21227 cause clients to perform DNS requests on the hostnames, which was
21228 not sensible behavior. Fixes bug 10801; bugfix on 0.2.0.1-alpha.
21229 - Avoid a 60-second delay in the bootstrapping process when a Tor
21230 client with pluggable transports re-reads its configuration at
21231 just the wrong time. Re-fixes bug 11156; bugfix on 0.2.5.3-alpha.
21233 o Minor bugfixes (client, logging during bootstrap):
21234 - Warn only once if we start logging in an unsafe way. Previously,
21235 we complain as many times as we had problems. Fixes bug 9870;
21236 bugfix on 0.2.5.1-alpha.
21237 - Only report the first fatal bootstrap error on a given OR
21238 connection. This stops us from telling the controller bogus error
21239 messages like "DONE". Fixes bug 10431; bugfix on 0.2.1.1-alpha.
21240 - Be more helpful when trying to run sandboxed on Linux without
21241 libseccomp. Instead of saying "Sandbox is not implemented on this
21242 platform", we now explain that we need to be built with
21243 libseccomp. Fixes bug 11543; bugfix on 0.2.5.1-alpha.
21244 - Avoid generating spurious warnings when starting with
21245 DisableNetwork enabled. Fixes bug 11200 and bug 10405; bugfix on
21248 o Minor bugfixes (closing OR connections):
21249 - If write_to_buf() in connection_write_to_buf_impl_() ever fails,
21250 check if it's an or_connection_t and correctly call
21251 connection_or_close_for_error() rather than
21252 connection_mark_for_close() directly. Fixes bug 11304; bugfix on
21254 - When closing all connections on setting DisableNetwork to 1, use
21255 connection_or_close_normally() rather than closing OR connections
21256 out from under the channel layer. Fixes bug 11306; bugfix on
21259 o Minor bugfixes (controller):
21260 - Avoid sending a garbage value to the controller when a circuit is
21261 cannibalized. Fixes bug 11519; bugfix on 0.2.3.11-alpha.
21263 o Minor bugfixes (tor-fw-helper):
21264 - Allow tor-fw-helper to build again by adding src/ext to its
21265 CPPFLAGS. Fixes bug 11296; bugfix on 0.2.5.3-alpha.
21267 o Minor bugfixes (bridges):
21268 - Avoid potential crashes or bad behavior when launching a
21269 server-side managed proxy with ORPort or ExtORPort temporarily
21270 disabled. Fixes bug 9650; bugfix on 0.2.3.16-alpha.
21272 o Minor bugfixes (platform-specific):
21273 - Fix compilation on Solaris, which does not have <endian.h>. Fixes
21274 bug 11426; bugfix on 0.2.5.3-alpha.
21275 - When dumping a malformed directory object to disk, save it in
21276 binary mode on Windows, not text mode. Fixes bug 11342; bugfix on
21278 - Don't report failures from make_socket_reuseable() on incoming
21279 sockets on OSX: this can happen when incoming connections close
21280 early. Fixes bug 10081.
21282 o Minor bugfixes (trivial memory leaks):
21283 - Fix a small memory leak when signing a directory object. Fixes bug
21284 11275; bugfix on 0.2.4.13-alpha.
21285 - Free placeholder entries in our circuit table at exit; fixes a
21286 harmless memory leak. Fixes bug 11278; bugfix on 0.2.5.1-alpha.
21287 - Don't re-initialize a second set of OpenSSL mutexes when starting
21288 up. Previously, we'd make one set of mutexes, and then immediately
21289 replace them with another. Fixes bug 11726; bugfix on
21291 - Resolve some memory leaks found by coverity in the unit tests, on
21292 exit in tor-gencert, and on a failure to compute digests for our
21293 own keys when generating a v3 networkstatus vote. These leaks
21294 should never have affected anyone in practice.
21296 o Minor bugfixes (hidden service):
21297 - Only retry attempts to connect to a chosen rendezvous point 8
21298 times, not 30. Fixes bug 4241; bugfix on 0.1.0.1-rc.
21300 o Minor bugfixes (misc code correctness):
21301 - Fix various instances of undefined behavior in channeltls.c,
21302 tor_memmem(), and eventdns.c that would cause us to construct
21303 pointers to memory outside an allocated object. (These invalid
21304 pointers were not accessed, but C does not even allow them to
21305 exist.) Fixes bug 10363; bugfixes on 0.1.1.1-alpha, 0.1.2.1-alpha,
21306 0.2.0.10-alpha, and 0.2.3.6-alpha. Reported by "bobnomnom".
21307 - Use the AddressSanitizer and Ubsan sanitizers (in clang-3.4) to
21308 fix some miscellaneous errors in our tests and codebase. Fixes bug
21309 11232. Bugfixes on versions back as far as 0.2.1.11-alpha.
21310 - Always check return values for unlink, munmap, UnmapViewOfFile;
21311 check strftime return values more often. In some cases all we can
21312 do is report a warning, but this may help prevent deeper bugs from
21313 going unnoticed. Closes ticket 8787; bugfixes on many, many tor
21315 - Fix numerous warnings from the clang "scan-build" static analyzer.
21316 Some of these are programming style issues; some of them are false
21317 positives that indicated awkward code; some are undefined behavior
21318 cases related to constructing (but not using) invalid pointers;
21319 some are assumptions about API behavior; some are (harmlessly)
21320 logging sizeof(ptr) bytes from a token when sizeof(*ptr) would be
21321 correct; and one or two are genuine bugs that weren't reachable
21322 from the rest of the program. Fixes bug 8793; bugfixes on many,
21326 - Build the torify.1 manpage again. Previously, we were only trying
21327 to build it when also building tor-fw-helper. That's why we didn't
21328 notice that we'd broken the ability to build it. Fixes bug 11321;
21329 bugfix on 0.2.5.1-alpha.
21330 - Fix the layout of the SOCKSPort flags in the manpage. Fixes bug
21331 11061; bugfix on 0.2.4.7-alpha.
21332 - Correctly document that we search for a system torrc file before
21333 looking in ~/.torrc. Fixes documentation side of 9213; bugfix on
21335 - Resolve warnings from Doxygen.
21337 o Code simplifications and refactoring:
21338 - Remove is_internal_IP() function. Resolves ticket 4645.
21339 - Remove unused function circuit_dump_by_chan from circuitlist.c.
21340 Closes issue 9107; patch from "marek".
21341 - Change our use of the ENUM_BF macro to avoid declarations that
21344 o Deprecated versions:
21345 - Tor 0.2.2.x has reached end-of-life; it has received no patches or
21346 attention for some while. Directory authorities no longer accept
21347 descriptors from relays running any version of Tor prior to Tor
21348 0.2.3.16-alpha. Resolves ticket 11149.
21351 - New macros in test.h to simplify writing mock-functions for unit
21352 tests. Part of ticket 11507. Patch from Dana Koch.
21353 - Complete tests for the status.c module. Resolves ticket 11507.
21354 Patch from Dana Koch.
21357 - Remove all code for the long unused v1 directory protocol.
21358 Resolves ticket 11070.
21361 Changes in version 0.2.5.3-alpha - 2014-03-22
21362 Tor 0.2.5.3-alpha includes all the fixes from 0.2.4.21. It contains
21363 two new anti-DoS features for Tor relays, resolves a bug that kept
21364 SOCKS5 support for IPv6 from working, fixes several annoying usability
21365 issues for bridge users, and removes more old code for unused
21368 The Tor 0.2.5.x release series is now in patch-freeze: no feature
21369 patches not already written will be considered for inclusion in 0.2.5.x.
21371 o Major features (relay security, DoS-resistance):
21372 - When deciding whether we have run out of memory and we need to
21373 close circuits, also consider memory allocated in buffers for
21374 streams attached to each circuit.
21376 This change, which extends an anti-DoS feature introduced in
21377 0.2.4.13-alpha and improved in 0.2.4.14-alpha, lets Tor exit relays
21378 better resist more memory-based DoS attacks than before. Since the
21379 MaxMemInCellQueues option now applies to all queues, it is renamed
21380 to MaxMemInQueues. This feature fixes bug 10169.
21381 - Avoid hash-flooding denial-of-service attacks by using the secure
21382 SipHash-2-4 hash function for our hashtables. Without this
21383 feature, an attacker could degrade performance of a targeted
21384 client or server by flooding their data structures with a large
21385 number of entries to be stored at the same hash table position,
21386 thereby slowing down the Tor instance. With this feature, hash
21387 table positions are derived from a randomized cryptographic key,
21388 and an attacker cannot predict which entries will collide. Closes
21390 - Decrease the lower limit of MaxMemInQueues to 256 MBytes (but leave
21391 the default at 8GBytes), to better support Raspberry Pi users. Fixes
21392 bug 9686; bugfix on 0.2.4.14-alpha.
21394 o Minor features (bridges, pluggable transports):
21395 - Bridges now write the SHA1 digest of their identity key
21396 fingerprint (that is, a hash of a hash of their public key) to
21397 notice-level logs, and to a new hashed-fingerprint file. This
21398 information will help bridge operators look up their bridge in
21399 Globe and similar tools. Resolves ticket 10884.
21400 - Improve the message that Tor displays when running as a bridge
21401 using pluggable transports without an Extended ORPort listener.
21402 Also, log the message in the log file too. Resolves ticket 11043.
21404 o Minor features (other):
21405 - Add a new option, PredictedPortsRelevanceTime, to control how long
21406 after having received a request to connect to a given port Tor
21407 will try to keep circuits ready in anticipation of future requests
21408 for that port. Patch from "unixninja92"; implements ticket 9176.
21409 - Generate a warning if any ports are listed in the SocksPolicy,
21410 DirPolicy, AuthDirReject, AuthDirInvalid, AuthDirBadDir, or
21411 AuthDirBadExit options. (These options only support address
21412 ranges.) Fixes part of ticket 11108.
21413 - Update geoip and geoip6 to the February 7 2014 Maxmind GeoLite2
21416 o Minor bugfixes (new since 0.2.5.2-alpha, also in 0.2.4.21):
21417 - Build without warnings under clang 3.4. (We have some macros that
21418 define static functions only some of which will get used later in
21419 the module. Starting with clang 3.4, these give a warning unless the
21420 unused attribute is set on them.) Resolves ticket 10904.
21421 - Fix build warnings about missing "a2x" comment when building the
21422 manpages from scratch on OpenBSD; OpenBSD calls it "a2x.py".
21423 Fixes bug 10929; bugfix on 0.2.2.9-alpha. Patch from Dana Koch.
21425 o Minor bugfixes (client):
21426 - Improve the log message when we can't connect to a hidden service
21427 because all of the hidden service directory nodes hosting its
21428 descriptor are excluded. Improves on our fix for bug 10722, which
21429 was a bugfix on 0.2.0.10-alpha.
21430 - Raise a control port warning when we fail to connect to all of
21431 our bridges. Previously, we didn't inform the controller, and
21432 the bootstrap process would stall. Fixes bug 11069; bugfix on
21434 - Exit immediately when a process-owning controller exits.
21435 Previously, tor relays would wait for a little while after their
21436 controller exited, as if they had gotten an INT signal -- but this
21437 was problematic, since there was no feedback for the user. To do a
21438 clean shutdown, controllers should send an INT signal and give Tor
21439 a chance to clean up. Fixes bug 10449; bugfix on 0.2.2.28-beta.
21440 - Stop attempting to connect to bridges before our pluggable
21441 transports are configured (harmless but resulted in some erroneous
21442 log messages). Fixes bug 11156; bugfix on 0.2.3.2-alpha.
21443 - Fix connections to IPv6 addresses over SOCKS5. Previously, we were
21444 generating incorrect SOCKS5 responses, and confusing client
21445 applications. Fixes bug 10987; bugfix on 0.2.4.7-alpha.
21447 o Minor bugfixes (relays and bridges):
21448 - Avoid crashing on a malformed resolv.conf file when running a
21449 relay using Libevent 1. Fixes bug 8788; bugfix on 0.1.1.23.
21450 - Non-exit relays no longer launch mock DNS requests to check for
21451 DNS hijacking. This has been unnecessary since 0.2.1.7-alpha, when
21452 non-exit relays stopped servicing DNS requests. Fixes bug 965;
21453 bugfix on 0.2.1.7-alpha. Patch from Matt Pagan.
21454 - Bridges now report complete directory request statistics. Related
21455 to bug 5824; bugfix on 0.2.2.1-alpha.
21456 - Bridges now never collect statistics that were designed for
21457 relays. Fixes bug 5824; bugfix on 0.2.3.8-alpha.
21458 - Stop giving annoying warning messages when we decide not to launch
21459 a pluggable transport proxy that we don't need (because there are
21460 no bridges configured to use it). Resolves ticket 5018; bugfix
21462 - Give the correct URL in the warning message when trying to run a
21463 relay on an ancient version of Windows. Fixes bug 9393.
21465 o Minor bugfixes (backtrace support):
21466 - Support automatic backtraces on more platforms by using the
21467 "-fasynchronous-unwind-tables" compiler option. This option is
21468 needed for platforms like 32-bit Intel where "-fomit-frame-pointer"
21469 is on by default and table generation is not. This doesn't yet
21470 add Windows support; only Linux, OSX, and some BSDs are affected.
21471 Reported by 'cypherpunks'; fixes bug 11047; bugfix on 0.2.5.2-alpha.
21472 - Avoid strange behavior if two threads hit failed assertions at the
21473 same time and both try to log backtraces at once. (Previously, if
21474 this had happened, both threads would have stored their intermediate
21475 results in the same buffer, and generated junk outputs.) Reported by
21476 "cypherpunks". Fixes bug 11048; bugfix on 0.2.5.2-alpha.
21477 - Fix a compiler warning in format_number_sigsafe(). Bugfix on
21478 0.2.5.2-alpha; patch from Nick Hopper.
21480 o Minor bugfixes (unit tests):
21481 - Fix a small bug in the unit tests that might have made the tests
21482 call 'chmod' with an uninitialized bitmask. Fixes bug 10928;
21483 bugfix on 0.2.5.1-alpha. Patch from Dana Koch.
21486 - Remove all remaining code related to version-0 hidden service
21487 descriptors: they have not been in use since 0.2.2.1-alpha. Fixes
21488 the rest of bug 10841.
21491 - Document in the manpage that "KBytes" may also be written as
21492 "kilobytes" or "KB", that "Kbits" may also be written as
21493 "kilobits", and so forth. Closes ticket 9222.
21494 - Document that the ClientOnly config option overrides ORPort.
21495 Our old explanation made ClientOnly sound as though it did
21496 nothing at all. Resolves bug 9059.
21497 - Explain that SocksPolicy, DirPolicy, and similar options don't
21498 take port arguments. Fixes the other part of ticket 11108.
21499 - Fix a comment about the rend_server_descriptor_t.protocols field
21500 to more accurately describe its range. Also, make that field
21501 unsigned, to more accurately reflect its usage. Fixes bug 9099;
21502 bugfix on 0.2.1.5-alpha.
21503 - Fix the manpage's description of HiddenServiceAuthorizeClient:
21504 the maximum client name length is 16, not 19. Fixes bug 11118;
21505 bugfix on 0.2.1.6-alpha.
21507 o Code simplifications and refactoring:
21508 - Get rid of router->address, since in all cases it was just the
21509 string representation of router->addr. Resolves ticket 5528.
21511 o Test infrastructure:
21512 - Update to the latest version of tinytest.
21513 - Improve the tinytest implementation of string operation tests so
21514 that comparisons with NULL strings no longer crash the tests; they
21515 now just fail, normally. Fixes bug 9004; bugfix on 0.2.2.4-alpha.
21518 Changes in version 0.2.4.21 - 2014-02-28
21519 Tor 0.2.4.21 further improves security against potential adversaries who
21520 find breaking 1024-bit crypto doable, and backports several stability
21521 and robustness patches from the 0.2.5 branch.
21523 o Major features (client security):
21524 - When we choose a path for a 3-hop circuit, make sure it contains
21525 at least one relay that supports the NTor circuit extension
21526 handshake. Otherwise, there is a chance that we're building
21527 a circuit that's worth attacking by an adversary who finds
21528 breaking 1024-bit crypto doable, and that chance changes the game
21529 theory. Implements ticket 9777.
21532 - Do not treat streams that fail with reason
21533 END_STREAM_REASON_INTERNAL as indicating a definite circuit failure,
21534 since it could also indicate an ENETUNREACH connection error. Fixes
21535 part of bug 10777; bugfix on 0.2.4.8-alpha.
21537 o Code simplification and refactoring:
21538 - Remove data structures which were introduced to implement the
21539 CellStatistics option: they are now redundant with the new timestamp
21540 field in the regular packed_cell_t data structure, which we did
21541 in 0.2.4.18-rc in order to resolve bug 9093. Resolves ticket 10870.
21544 - Always clear OpenSSL bignums before freeing them -- even bignums
21545 that don't contain secrets. Resolves ticket 10793. Patch by
21547 - Build without warnings under clang 3.4. (We have some macros that
21548 define static functions only some of which will get used later in
21549 the module. Starting with clang 3.4, these give a warning unless the
21550 unused attribute is set on them.) Resolves ticket 10904.
21551 - Update geoip and geoip6 files to the February 7 2014 Maxmind
21552 GeoLite2 Country database.
21555 - Set the listen() backlog limit to the largest actually supported
21556 on the system, not to the value in a header file. Fixes bug 9716;
21557 bugfix on every released Tor.
21558 - Treat ENETUNREACH, EACCES, and EPERM connection failures at an
21559 exit node as a NOROUTE error, not an INTERNAL error, since they
21560 can apparently happen when trying to connect to the wrong sort
21561 of netblocks. Fixes part of bug 10777; bugfix on 0.1.0.1-rc.
21562 - Fix build warnings about missing "a2x" comment when building the
21563 manpages from scratch on OpenBSD; OpenBSD calls it "a2x.py".
21564 Fixes bug 10929; bugfix on 0.2.2.9-alpha. Patch from Dana Koch.
21565 - Avoid a segfault on SIGUSR1, where we had freed a connection but did
21566 not entirely remove it from the connection lists. Fixes bug 9602;
21567 bugfix on 0.2.4.4-alpha.
21568 - Fix a segmentation fault in our benchmark code when running with
21569 Fedora's OpenSSL package, or any other OpenSSL that provides
21570 ECDH but not P224. Fixes bug 10835; bugfix on 0.2.4.8-alpha.
21571 - Turn "circuit handshake stats since last time" log messages into a
21572 heartbeat message. Fixes bug 10485; bugfix on 0.2.4.17-rc.
21574 o Documentation fixes:
21575 - Document that all but one DirPort entry must have the NoAdvertise
21576 flag set. Fixes bug 10470; bugfix on 0.2.3.3-alpha / 0.2.3.16-alpha.
21579 Changes in version 0.2.5.2-alpha - 2014-02-13
21580 Tor 0.2.5.2-alpha includes all the fixes from 0.2.4.18-rc and 0.2.4.20,
21581 like the "poor random number generation" fix and the "building too many
21582 circuits" fix. It also further improves security against potential
21583 adversaries who find breaking 1024-bit crypto doable, and launches
21584 pluggable transports on demand (which gets us closer to integrating
21585 pluggable transport support by default -- not to be confused with Tor
21586 bundles enabling pluggable transports and bridges by default).
21588 o Major features (client security):
21589 - When we choose a path for a 3-hop circuit, make sure it contains
21590 at least one relay that supports the NTor circuit extension
21591 handshake. Otherwise, there is a chance that we're building
21592 a circuit that's worth attacking by an adversary who finds
21593 breaking 1024-bit crypto doable, and that chance changes the game
21594 theory. Implements ticket 9777.
21595 - Clients now look at the "usecreatefast" consensus parameter to
21596 decide whether to use CREATE_FAST or CREATE cells for the first hop
21597 of their circuit. This approach can improve security on connections
21598 where Tor's circuit handshake is stronger than the available TLS
21599 connection security levels, but the tradeoff is more computational
21600 load on guard relays. Implements proposal 221. Resolves ticket 9386.
21602 o Major features (bridges):
21603 - Don't launch pluggable transport proxies if we don't have any
21604 bridges configured that would use them. Now we can list many
21605 pluggable transports, and Tor will dynamically start one when it
21606 hears a bridge address that needs it. Resolves ticket 5018.
21607 - The bridge directory authority now assigns status flags (Stable,
21608 Guard, etc) to bridges based on thresholds calculated over all
21609 Running bridges. Now bridgedb can finally make use of its features
21610 to e.g. include at least one Stable bridge in its answers. Fixes
21613 o Major features (other):
21614 - Extend ORCONN controller event to include an "ID" parameter,
21615 and add four new controller event types CONN_BW, CIRC_BW,
21616 CELL_STATS, and TB_EMPTY that show connection and circuit usage.
21617 The new events are emitted in private Tor networks only, with the
21618 goal of being able to better track performance and load during
21619 full-network simulations. Implements proposal 218 and ticket 7359.
21620 - On some platforms (currently: recent OSX versions, glibc-based
21621 platforms that support the ELF format, and a few other
21622 Unix-like operating systems), Tor can now dump stack traces
21623 when a crash occurs or an assertion fails. By default, traces
21624 are dumped to stderr (if possible) and to any logs that are
21625 reporting errors. Implements ticket 9299.
21628 - Avoid a segfault on SIGUSR1, where we had freed a connection but did
21629 not entirely remove it from the connection lists. Fixes bug 9602;
21630 bugfix on 0.2.4.4-alpha.
21631 - Do not treat streams that fail with reason
21632 END_STREAM_REASON_INTERNAL as indicating a definite circuit failure,
21633 since it could also indicate an ENETUNREACH connection error. Fixes
21634 part of bug 10777; bugfix on 0.2.4.8-alpha.
21636 o Major bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.20):
21637 - Do not allow OpenSSL engines to replace the PRNG, even when
21638 HardwareAccel is set. The only default builtin PRNG engine uses
21639 the Intel RDRAND instruction to replace the entire PRNG, and
21640 ignores all attempts to seed it with more entropy. That's
21641 cryptographically stupid: the right response to a new alleged
21642 entropy source is never to discard all previously used entropy
21643 sources. Fixes bug 10402; works around behavior introduced in
21644 OpenSSL 1.0.0. Diagnosis and investigation thanks to "coderman"
21646 - Fix assertion failure when AutomapHostsOnResolve yields an IPv6
21647 address. Fixes bug 10465; bugfix on 0.2.4.7-alpha.
21648 - Avoid launching spurious extra circuits when a stream is pending.
21649 This fixes a bug where any circuit that _wasn't_ unusable for new
21650 streams would be treated as if it were, causing extra circuits to
21651 be launched. Fixes bug 10456; bugfix on 0.2.4.12-alpha.
21653 o Major bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
21654 - No longer stop reading or writing on cpuworker connections when
21655 our rate limiting buckets go empty. Now we should handle circuit
21656 handshake requests more promptly. Resolves bug 9731.
21657 - Stop trying to bootstrap all our directory information from
21658 only our first guard. Discovered while fixing bug 9946; bugfix
21661 o Minor features (bridges, pluggable transports):
21662 - Add threshold cutoffs to the networkstatus document created by
21663 the Bridge Authority. Fixes bug 1117.
21664 - On Windows, spawn background processes using the CREATE_NO_WINDOW
21665 flag. Now Tor Browser Bundle 3.5 with pluggable transports enabled
21666 doesn't pop up a blank console window. (In Tor Browser Bundle 2.x,
21667 Vidalia set this option for us.) Implements ticket 10297.
21669 o Minor features (security):
21670 - Always clear OpenSSL bignums before freeing them -- even bignums
21671 that don't contain secrets. Resolves ticket 10793. Patch by
21674 o Minor features (config options and command line):
21675 - Add an --allow-missing-torrc commandline option that tells Tor to
21676 run even if the configuration file specified by -f is not available.
21677 Implements ticket 10060.
21678 - Add support for the TPROXY transparent proxying facility on Linux.
21679 See documentation for the new TransProxyType option for more
21680 details. Implementation by "thomo". Closes ticket 10582.
21682 o Minor features (controller):
21683 - Add a new "HS_DESC" controller event that reports activities
21684 related to hidden service descriptors. Resolves ticket 8510.
21685 - New "DROPGUARDS" controller command to forget all current entry
21686 guards. Not recommended for ordinary use, since replacing guards
21687 too frequently makes several attacks easier. Resolves ticket 9934;
21690 o Minor features (build):
21691 - Assume that a user using ./configure --host wants to cross-compile,
21692 and give an error if we cannot find a properly named
21693 tool-chain. Add a --disable-tool-name-check option to proceed
21694 nevertheless. Addresses ticket 9869. Patch by Benedikt Gollatz.
21695 - If we run ./configure and the compiler recognizes -fstack-protector
21696 but the linker rejects it, warn the user about a potentially missing
21697 libssp package. Addresses ticket 9948. Patch from Benedikt Gollatz.
21699 o Minor features (testing):
21700 - If Python is installed, "make check" now runs extra tests beyond
21701 the unit test scripts.
21702 - When bootstrapping a test network, sometimes very few relays get
21703 the Guard flag. Now a new option "TestingDirAuthVoteGuard" can
21704 specify a set of relays which should be voted Guard regardless of
21705 their uptime or bandwidth. Addresses ticket 9206.
21707 o Minor features (log messages):
21708 - When ServerTransportPlugin is set on a bridge, Tor can write more
21709 useful statistics about bridge use in its extrainfo descriptors,
21710 but only if the Extended ORPort ("ExtORPort") is set too. Add a
21711 log message to inform the user in this case. Resolves ticket 9651.
21712 - When receiving a new controller connection, log the origin address.
21713 Resolves ticket 9698; patch from "sigpipe".
21714 - When logging OpenSSL engine status at startup, log the status of
21715 more engines. Fixes ticket 10043; patch from Joshua Datko.
21716 - Turn "circuit handshake stats since last time" log messages into a
21717 heartbeat message. Fixes bug 10485; bugfix on 0.2.4.17-rc.
21719 o Minor features (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
21720 - Improve the circuit queue out-of-memory handler. Previously, when
21721 we ran low on memory, we'd close whichever circuits had the most
21722 queued cells. Now, we close those that have the *oldest* queued
21723 cells, on the theory that those are most responsible for us
21724 running low on memory. Based on analysis from a forthcoming paper
21725 by Jansen, Tschorsch, Johnson, and Scheuermann. Fixes bug 9093.
21726 - Generate bootstrapping status update events correctly when fetching
21727 microdescriptors. Fixes bug 9927.
21728 - Update to the October 2 2013 Maxmind GeoLite Country database.
21730 o Minor bugfixes (clients):
21731 - When closing a channel that has already been open, do not close
21732 pending circuits that were waiting to connect to the same relay.
21733 Fixes bug 9880; bugfix on 0.2.5.1-alpha. Thanks to skruffy for
21736 o Minor bugfixes (relays):
21737 - Treat ENETUNREACH, EACCES, and EPERM connection failures at an
21738 exit node as a NOROUTE error, not an INTERNAL error, since they
21739 can apparently happen when trying to connect to the wrong sort
21740 of netblocks. Fixes part of bug 10777; bugfix on 0.1.0.1-rc.
21742 o Minor bugfixes (bridges):
21743 - Fix a bug where the first connection works to a bridge that uses a
21744 pluggable transport with client-side parameters, but we don't send
21745 the client-side parameters on subsequent connections. (We don't
21746 use any pluggable transports with client-side parameters yet,
21747 but ScrambleSuit will soon become the first one.) Fixes bug 9162;
21748 bugfix on 0.2.0.3-alpha. Based on a patch from "rl1987".
21750 o Minor bugfixes (node selection):
21751 - If ExcludeNodes is set, consider non-excluded hidden service
21752 directory servers before excluded ones. Do not consider excluded
21753 hidden service directory servers at all if StrictNodes is
21754 set. (Previously, we would sometimes decide to connect to those
21755 servers, and then realize before we initiated a connection that
21756 we had excluded them.) Fixes bug 10722; bugfix on 0.2.0.10-alpha.
21757 Reported by "mr-4".
21758 - If we set the ExitNodes option but it doesn't include any nodes
21759 that have the Exit flag, we would choose not to bootstrap. Now we
21760 bootstrap so long as ExitNodes includes nodes which can exit to
21761 some port. Fixes bug 10543; bugfix on 0.2.4.10-alpha.
21763 o Minor bugfixes (controller and command-line):
21764 - If changing a config option via "setconf" fails in a recoverable
21765 way, we used to nonetheless write our new control ports to the
21766 file described by the "ControlPortWriteToFile" option. Now we only
21767 write out that file if we successfully switch to the new config
21768 option. Fixes bug 5605; bugfix on 0.2.2.26-beta. Patch from "Ryman".
21769 - When a command-line option such as --version or --help that
21770 ordinarily implies --hush appears on the command line along with
21771 --quiet, then actually obey --quiet. Previously, we obeyed --quiet
21772 only if it appeared later on the command line. Fixes bug 9578;
21773 bugfix on 0.2.5.1-alpha.
21775 o Minor bugfixes (code correctness):
21776 - Previously we used two temporary files when writing descriptors to
21777 disk; now we only use one. Fixes bug 1376.
21778 - Remove an erroneous (but impossible and thus harmless) pointer
21779 comparison that would have allowed compilers to skip a bounds
21780 check in channeltls.c. Fixes bugs 10313 and 9980; bugfix on
21781 0.2.0.10-alpha. Noticed by Jared L Wong and David Fifield.
21782 - Fix an always-true assertion in pluggable transports code so it
21783 actually checks what it was trying to check. Fixes bug 10046;
21784 bugfix on 0.2.3.9-alpha. Found by "dcb".
21786 o Minor bugfixes (protocol correctness):
21787 - When receiving a VERSIONS cell with an odd number of bytes, close
21788 the connection immediately since the cell is malformed. Fixes bug
21789 10365; bugfix on 0.2.0.10-alpha. Spotted by "bobnomnom"; fix by
21792 o Minor bugfixes (build):
21793 - Restore the ability to compile Tor with V2_HANDSHAKE_SERVER
21794 turned off (that is, without support for v2 link handshakes). Fixes
21795 bug 4677; bugfix on 0.2.3.2-alpha. Patch from "piet".
21796 - Fix compilation warnings and startup issues when running with
21797 "Sandbox 1" and libseccomp-2.1.0. Fixes bug 10563; bugfix on
21799 - Fix compilation on Solaris 9, which didn't like us having an
21800 identifier named "sun". Fixes bug 10565; bugfix in 0.2.5.1-alpha.
21802 o Minor bugfixes (testing):
21803 - Fix a segmentation fault in our benchmark code when running with
21804 Fedora's OpenSSL package, or any other OpenSSL that provides
21805 ECDH but not P224. Fixes bug 10835; bugfix on 0.2.4.8-alpha.
21807 o Minor bugfixes (log messages):
21808 - Fix a bug where clients using bridges would report themselves
21809 as 50% bootstrapped even without a live consensus document.
21810 Fixes bug 9922; bugfix on 0.2.1.1-alpha.
21811 - Suppress a warning where, if there's only one directory authority
21812 in the network, we would complain that votes and signatures cannot
21813 be uploaded to other directory authorities. Fixes bug 10842;
21814 bugfix on 0.2.2.26-beta.
21815 - Report bootstrapping progress correctly when we're downloading
21816 microdescriptors. We had updated our "do we have enough microdescs
21817 to begin building circuits?" logic most recently in 0.2.4.10-alpha
21818 (see bug 5956), but we left the bootstrap status event logic at
21819 "how far through getting 1/4 of them are we?" Fixes bug 9958;
21820 bugfix on 0.2.2.36, which is where they diverged (see bug 5343).
21822 o Minor bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.20):
21823 - Avoid a crash bug when starting with a corrupted microdescriptor
21824 cache file. Fixes bug 10406; bugfix on 0.2.2.6-alpha.
21825 - If we fail to dump a previously cached microdescriptor to disk, avoid
21826 freeing duplicate data later on. Fixes bug 10423; bugfix on
21827 0.2.4.13-alpha. Spotted by "bobnomnom".
21829 o Minor bugfixes on 0.2.4.x (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
21830 - Correctly log long IPv6 exit policies, instead of truncating them
21831 or reporting an error. Fixes bug 9596; bugfix on 0.2.4.7-alpha.
21832 - Our default TLS ecdhe groups were backwards: we meant to be using
21833 P224 for relays (for performance win) and P256 for bridges (since
21834 it is more common in the wild). Instead we had it backwards. After
21835 reconsideration, we decided that the default should be P256 on all
21836 hosts, since its security is probably better, and since P224 is
21837 reportedly used quite little in the wild. Found by "skruffy" on
21838 IRC. Fix for bug 9780; bugfix on 0.2.4.8-alpha.
21839 - Free directory authority certificate download statuses on exit
21840 rather than leaking them. Fixes bug 9644; bugfix on 0.2.4.13-alpha.
21842 o Minor bugfixes on 0.2.3.x (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
21843 - If the guard we choose first doesn't answer, we would try the
21844 second guard, but once we connected to the second guard we would
21845 abandon it and retry the first one, slowing down bootstrapping.
21846 The fix is to treat all our initially chosen guards as acceptable
21847 to use. Fixes bug 9946; bugfix on 0.1.1.11-alpha.
21848 - Fix an assertion failure that would occur when disabling the
21849 ORPort setting on a running Tor process while accounting was
21850 enabled. Fixes bug 6979; bugfix on 0.2.2.18-alpha.
21851 - When examining the list of network interfaces to find our address,
21852 do not consider non-running or disabled network interfaces. Fixes
21853 bug 9904; bugfix on 0.2.3.11-alpha. Patch from "hantwister".
21854 - Avoid an off-by-one error when checking buffer boundaries when
21855 formatting the exit status of a pluggable transport helper.
21856 This is probably not an exploitable bug, but better safe than
21857 sorry. Fixes bug 9928; bugfix on 0.2.3.18-rc. Bug found by
21860 o Removed code and features:
21861 - Clients now reject any directory authority certificates lacking
21862 a dir-key-crosscert element. These have been included since
21863 0.2.1.9-alpha, so there's no real reason for them to be optional
21864 any longer. Completes proposal 157. Resolves ticket 10162.
21865 - Remove all code that existed to support the v2 directory system,
21866 since there are no longer any v2 directory authorities. Resolves
21868 - Remove the HSAuthoritativeDir and AlternateHSAuthority torrc
21869 options, which were used for designating authorities as "Hidden
21870 service authorities". There has been no use of hidden service
21871 authorities since 0.2.2.1-alpha, when we stopped uploading or
21872 downloading v0 hidden service descriptors. Fixes bug 10881; also
21873 part of a fix for bug 10841.
21875 o Code simplification and refactoring:
21876 - Remove some old fallback code designed to keep Tor clients working
21877 in a network with only two working relays. Elsewhere in the code we
21878 have long since stopped supporting such networks, so there wasn't
21879 much point in keeping it around. Addresses ticket 9926.
21880 - Reject 0-length EXTEND2 cells more explicitly. Fixes bug 10536;
21881 bugfix on 0.2.4.8-alpha. Reported by "cypherpunks".
21882 - Remove data structures which were introduced to implement the
21883 CellStatistics option: they are now redundant with the addition
21884 of a timestamp to the regular packed_cell_t data structure, which
21885 we did in 0.2.4.18-rc in order to resolve ticket 9093. Implements
21888 o Documentation (man page) fixes:
21889 - Update manpage to describe some of the files you can expect to
21890 find in Tor's DataDirectory. Addresses ticket 9839.
21891 - Document that all but one DirPort entry must have the NoAdvertise
21892 flag set. Fixes bug 10470; bugfix on 0.2.3.3-alpha / 0.2.3.16-alpha.
21894 o Documentation fixes (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
21895 - Clarify the usage and risks of setting the ContactInfo torrc line
21896 for your relay or bridge. Resolves ticket 9854.
21897 - Add anchors to the manpage so we can link to the html version of
21898 the documentation for specific options. Resolves ticket 9866.
21899 - Replace remaining references to DirServer in man page and
21900 log entries. Resolves ticket 10124.
21903 - Make the "tor-gencert" tool used by directory authority operators
21904 create 2048-bit signing keys by default (rather than 1024-bit, since
21905 1024-bit is uncomfortably small these days). Addresses ticket 10324.
21908 Changes in version 0.2.4.20 - 2013-12-22
21909 Tor 0.2.4.20 fixes potentially poor random number generation for users
21910 who 1) use OpenSSL 1.0.0 or later, 2) set "HardwareAccel 1" in their
21911 torrc file, 3) have "Sandy Bridge" or "Ivy Bridge" Intel processors,
21912 and 4) have no state file in their DataDirectory (as would happen on
21913 first start). Users who generated relay or hidden service identity
21914 keys in such a situation should discard them and generate new ones.
21916 This release also fixes a logic error that caused Tor clients to build
21917 many more preemptive circuits than they actually need.
21920 - Do not allow OpenSSL engines to replace the PRNG, even when
21921 HardwareAccel is set. The only default builtin PRNG engine uses
21922 the Intel RDRAND instruction to replace the entire PRNG, and
21923 ignores all attempts to seed it with more entropy. That's
21924 cryptographically stupid: the right response to a new alleged
21925 entropy source is never to discard all previously used entropy
21926 sources. Fixes bug 10402; works around behavior introduced in
21927 OpenSSL 1.0.0. Diagnosis and investigation thanks to "coderman"
21929 - Fix assertion failure when AutomapHostsOnResolve yields an IPv6
21930 address. Fixes bug 10465; bugfix on 0.2.4.7-alpha.
21931 - Avoid launching spurious extra circuits when a stream is pending.
21932 This fixes a bug where any circuit that _wasn't_ unusable for new
21933 streams would be treated as if it were, causing extra circuits to
21934 be launched. Fixes bug 10456; bugfix on 0.2.4.12-alpha.
21937 - Avoid a crash bug when starting with a corrupted microdescriptor
21938 cache file. Fixes bug 10406; bugfix on 0.2.2.6-alpha.
21939 - If we fail to dump a previously cached microdescriptor to disk, avoid
21940 freeing duplicate data later on. Fixes bug 10423; bugfix on
21941 0.2.4.13-alpha. Spotted by "bobnomnom".
21944 Changes in version 0.2.4.19 - 2013-12-11
21945 The Tor 0.2.4 release series is dedicated to the memory of Aaron Swartz
21946 (1986-2013). Aaron worked on diverse projects including helping to guide
21947 Creative Commons, playing a key role in stopping SOPA/PIPA, bringing
21948 transparency to the U.S government's PACER documents, and contributing
21949 design and development for Tor and Tor2Web. Aaron was one of the latest
21950 martyrs in our collective fight for civil liberties and human rights,
21951 and his death is all the more painful because he was one of us.
21953 Tor 0.2.4.19, the first stable release in the 0.2.4 branch, features
21954 a new circuit handshake and link encryption that use ECC to provide
21955 better security and efficiency; makes relays better manage circuit
21956 creation requests; uses "directory guards" to reduce client enumeration
21957 risks; makes bridges collect and report statistics about the pluggable
21958 transports they support; cleans up and improves our geoip database;
21959 gets much closer to IPv6 support for clients, bridges, and relays; makes
21960 directory authorities use measured bandwidths rather than advertised
21961 ones when computing flags and thresholds; disables client-side DNS
21962 caching to reduce tracking risks; and fixes a big bug in bridge
21963 reachability testing. This release introduces two new design
21964 abstractions in the code: a new "channel" abstraction between circuits
21965 and or_connections to allow for implementing alternate relay-to-relay
21966 transports, and a new "circuitmux" abstraction storing the queue of
21967 circuits for a channel. The release also includes many stability,
21968 security, and privacy fixes.
21971 Changes in version 0.2.4.18-rc - 2013-11-16
21972 Tor 0.2.4.18-rc is the fourth release candidate for the Tor 0.2.4.x
21973 series. It takes a variety of fixes from the 0.2.5.x branch to improve
21974 stability, performance, and better handling of edge cases.
21977 - Re-enable TLS 1.1 and 1.2 when built with OpenSSL 1.0.1e or later.
21978 Resolves ticket 6055. (OpenSSL before 1.0.1 didn't have TLS 1.1 or
21979 1.2, and OpenSSL from 1.0.1 through 1.0.1d had bugs that prevented
21980 renegotiation from working with TLS 1.1 or 1.2, so we had disabled
21981 them to solve bug 6033.)
21984 - No longer stop reading or writing on cpuworker connections when
21985 our rate limiting buckets go empty. Now we should handle circuit
21986 handshake requests more promptly. Resolves bug 9731.
21987 - If we are unable to save a microdescriptor to the journal, do not
21988 drop it from memory and then reattempt downloading it. Fixes bug
21989 9645; bugfix on 0.2.2.6-alpha.
21990 - Stop trying to bootstrap all our directory information from
21991 only our first guard. Discovered while fixing bug 9946; bugfix
21993 - The new channel code sometimes lost track of in-progress circuits,
21994 causing long-running clients to stop building new circuits. The
21995 fix is to always call circuit_n_chan_done(chan, 0) from
21996 channel_closed(). Fixes bug 9776; bugfix on 0.2.4.17-rc.
21998 o Minor bugfixes (on 0.2.4.x):
21999 - Correctly log long IPv6 exit policies, instead of truncating them
22000 or reporting an error. Fixes bug 9596; bugfix on 0.2.4.7-alpha.
22001 - Our default TLS ecdhe groups were backwards: we meant to be using
22002 P224 for relays (for performance win) and P256 for bridges (since
22003 it is more common in the wild). Instead we had it backwards. After
22004 reconsideration, we decided that the default should be P256 on all
22005 hosts, since its security is probably better, and since P224 is
22006 reportedly used quite little in the wild. Found by "skruffy" on
22007 IRC. Fix for bug 9780; bugfix on 0.2.4.8-alpha.
22008 - Free directory authority certificate download statuses on exit
22009 rather than leaking them. Fixes bug 9644; bugfix on 0.2.4.13-alpha.
22011 o Minor bugfixes (on 0.2.3.x and earlier):
22012 - If the guard we choose first doesn't answer, we would try the
22013 second guard, but once we connected to the second guard we would
22014 abandon it and retry the first one, slowing down bootstrapping.
22015 The fix is to treat all our initially chosen guards as acceptable
22016 to use. Fixes bug 9946; bugfix on 0.1.1.11-alpha.
22017 - Fix an assertion failure that would occur when disabling the
22018 ORPort setting on a running Tor process while accounting was
22019 enabled. Fixes bug 6979; bugfix on 0.2.2.18-alpha.
22020 - When examining the list of network interfaces to find our address,
22021 do not consider non-running or disabled network interfaces. Fixes
22022 bug 9904; bugfix on 0.2.3.11-alpha. Patch from "hantwister".
22023 - Avoid an off-by-one error when checking buffer boundaries when
22024 formatting the exit status of a pluggable transport helper.
22025 This is probably not an exploitable bug, but better safe than
22026 sorry. Fixes bug 9928; bugfix on 0.2.3.18-rc. Bug found by
22029 o Minor features (protecting client timestamps):
22030 - Clients no longer send timestamps in their NETINFO cells. These were
22031 not used for anything, and they provided one small way for clients
22032 to be distinguished from each other as they moved from network to
22033 network or behind NAT. Implements part of proposal 222.
22034 - Clients now round timestamps in INTRODUCE cells down to the nearest
22035 10 minutes. If a new Support022HiddenServices option is set to 0, or
22036 if it's set to "auto" and the feature is disabled in the consensus,
22037 the timestamp is sent as 0 instead. Implements part of proposal 222.
22038 - Stop sending timestamps in AUTHENTICATE cells. This is not such
22039 a big deal from a security point of view, but it achieves no actual
22040 good purpose, and isn't needed. Implements part of proposal 222.
22041 - Reduce down accuracy of timestamps in hidden service descriptors.
22042 Implements part of proposal 222.
22044 o Minor features (other):
22045 - Improve the circuit queue out-of-memory handler. Previously, when
22046 we ran low on memory, we'd close whichever circuits had the most
22047 queued cells. Now, we close those that have the *oldest* queued
22048 cells, on the theory that those are most responsible for us
22049 running low on memory. Based on analysis from a forthcoming paper
22050 by Jansen, Tschorsch, Johnson, and Scheuermann. Fixes bug 9093.
22051 - Generate bootstrapping status update events correctly when fetching
22052 microdescriptors. Fixes bug 9927.
22053 - Update to the October 2 2013 Maxmind GeoLite Country database.
22055 o Documentation fixes:
22056 - Clarify the usage and risks of setting the ContactInfo torrc line
22057 for your relay or bridge. Resolves ticket 9854.
22058 - Add anchors to the manpage so we can link to the html version of
22059 the documentation for specific options. Resolves ticket 9866.
22060 - Replace remaining references to DirServer in man page and
22061 log entries. Resolves ticket 10124.
22064 Changes in version 0.2.5.1-alpha - 2013-10-02
22065 Tor 0.2.5.1-alpha introduces experimental support for syscall sandboxing
22066 on Linux, allows bridges that offer pluggable transports to report usage
22067 statistics, fixes many issues to make testing easier, and provides
22068 a pile of minor features and bugfixes that have been waiting for a
22069 release of the new branch.
22071 This is the first alpha release in a new series, so expect there to
22072 be bugs. Users who would rather test out a more stable branch should
22073 stay with 0.2.4.x for now.
22075 o Major features (security):
22076 - Use the seccomp2 syscall filtering facility on Linux to limit
22077 which system calls Tor can invoke. This is an experimental,
22078 Linux-only feature to provide defense-in-depth against unknown
22079 attacks. To try turning it on, set "Sandbox 1" in your torrc
22080 file. Please be ready to report bugs. We hope to add support
22081 for better sandboxing in the future, including more fine-grained
22082 filters, better division of responsibility, and support for more
22083 platforms. This work has been done by Cristian-Matei Toader for
22084 Google Summer of Code.
22085 - Re-enable TLS 1.1 and 1.2 when built with OpenSSL 1.0.1e or later.
22086 Resolves ticket 6055. (OpenSSL before 1.0.1 didn't have TLS 1.1 or
22087 1.2, and OpenSSL from 1.0.1 through 1.0.1d had bugs that prevented
22088 renegotiation from working with TLS 1.1 or 1.2, so we had disabled
22089 them to solve bug 6033.)
22091 o Major features (other):
22092 - Add support for passing arguments to managed pluggable transport
22093 proxies. Implements ticket 3594.
22094 - Bridges now track GeoIP information and the number of their users
22095 even when pluggable transports are in use, and report usage
22096 statistics in their extra-info descriptors. Resolves tickets 4773
22098 - Make testing Tor networks bootstrap better: lower directory fetch
22099 retry schedules and maximum interval without directory requests,
22100 and raise maximum download tries. Implements ticket 6752.
22101 - Add make target 'test-network' to run tests on a Chutney network.
22102 Implements ticket 8530.
22103 - The ntor handshake is now on-by-default, no matter what the
22104 directory authorities recommend. Implements ticket 8561.
22107 - Instead of writing destroy cells directly to outgoing connection
22108 buffers, queue them and intersperse them with other outgoing cells.
22109 This can prevent a set of resource starvation conditions where too
22110 many pending destroy cells prevent data cells from actually getting
22111 delivered. Reported by "oftc_must_be_destroyed". Fixes bug 7912;
22112 bugfix on 0.2.0.1-alpha.
22113 - If we are unable to save a microdescriptor to the journal, do not
22114 drop it from memory and then reattempt downloading it. Fixes bug
22115 9645; bugfix on 0.2.2.6-alpha.
22116 - The new channel code sometimes lost track of in-progress circuits,
22117 causing long-running clients to stop building new circuits. The
22118 fix is to always call circuit_n_chan_done(chan, 0) from
22119 channel_closed(). Fixes bug 9776; bugfix on 0.2.4.17-rc.
22122 - Tor now builds each source file in two modes: a mode that avoids
22123 exposing identifiers needlessly, and another mode that exposes
22124 more identifiers for testing. This lets the compiler do better at
22125 optimizing the production code, while enabling us to take more
22126 radical measures to let the unit tests test things.
22127 - The production builds no longer include functions used only in
22128 the unit tests; all functions exposed from a module only for
22129 unit-testing are now static in production builds.
22130 - Add an --enable-coverage configuration option to make the unit
22131 tests (and a new src/or/tor-cov target) to build with gcov test
22135 - We now have rudimentary function mocking support that our unit
22136 tests can use to test functions in isolation. Function mocking
22137 lets the tests temporarily replace a function's dependencies with
22138 stub functions, so that the tests can check the function without
22139 invoking the other functions it calls.
22140 - Add more unit tests for the <circid,channel>->circuit map, and
22141 the destroy-cell-tracking code to fix bug 7912.
22142 - Unit tests for failing cases of the TAP onion handshake.
22143 - More unit tests for address-manipulation functions.
22145 o Minor features (protecting client timestamps):
22146 - Clients no longer send timestamps in their NETINFO cells. These were
22147 not used for anything, and they provided one small way for clients
22148 to be distinguished from each other as they moved from network to
22149 network or behind NAT. Implements part of proposal 222.
22150 - Clients now round timestamps in INTRODUCE cells down to the nearest
22151 10 minutes. If a new Support022HiddenServices option is set to 0, or
22152 if it's set to "auto" and the feature is disabled in the consensus,
22153 the timestamp is sent as 0 instead. Implements part of proposal 222.
22154 - Stop sending timestamps in AUTHENTICATE cells. This is not such
22155 a big deal from a security point of view, but it achieves no actual
22156 good purpose, and isn't needed. Implements part of proposal 222.
22157 - Reduce down accuracy of timestamps in hidden service descriptors.
22158 Implements part of proposal 222.
22160 o Minor features (config options):
22161 - Config (torrc) lines now handle fingerprints which are missing
22162 their initial '$'. Resolves ticket 4341; improvement over 0.0.9pre5.
22163 - Support a --dump-config option to print some or all of the
22164 configured options. Mainly useful for debugging the command-line
22165 option parsing code. Helps resolve ticket 4647.
22166 - Raise awareness of safer logging: notify user of potentially
22167 unsafe config options, like logging more verbosely than severity
22168 "notice" or setting SafeLogging to 0. Resolves ticket 5584.
22169 - Add a new configuration option TestingV3AuthVotingStartOffset
22170 that bootstraps a network faster by changing the timing for
22171 consensus votes. Addresses ticket 8532.
22172 - Add a new torrc option "ServerTransportOptions" that allows
22173 bridge operators to pass configuration parameters to their
22174 pluggable transports. Resolves ticket 8929.
22175 - The config (torrc) file now accepts bandwidth and space limits in
22176 bits as well as bytes. (Anywhere that you can say "2 Kilobytes",
22177 you can now say "16 kilobits", and so on.) Resolves ticket 9214.
22180 o Minor features (build):
22181 - Add support for `--library-versions` flag. Implements ticket 6384.
22182 - Return the "unexpected sendme" warnings to a warn severity, but make
22183 them rate limited, to help diagnose ticket 8093.
22184 - Detect a missing asciidoc, and warn the user about it, during
22185 configure rather than at build time. Fixes issue 6506. Patch from
22188 o Minor features (other):
22189 - Use the SOCK_NONBLOCK socket type, if supported, to open nonblocking
22190 sockets in a single system call. Implements ticket 5129.
22191 - Log current accounting state (bytes sent and received + remaining
22192 time for the current accounting period) in the relay's heartbeat
22193 message. Implements ticket 5526; patch from Peter Retzlaff.
22194 - Implement the TRANSPORT_LAUNCHED control port event that
22195 notifies controllers about new launched pluggable
22196 transports. Resolves ticket 5609.
22197 - If we're using the pure-C 32-bit curve25519_donna implementation
22198 of curve25519, build it with the -fomit-frame-pointer option to
22199 make it go faster on register-starved hosts. This improves our
22200 handshake performance by about 6% on i386 hosts without nacl.
22201 Closes ticket 8109.
22202 - Update to the September 4 2013 Maxmind GeoLite Country database.
22205 - Set the listen() backlog limit to the largest actually supported
22206 on the system, not to the value in a header file. Fixes bug 9716;
22207 bugfix on every released Tor.
22208 - No longer accept malformed http headers when parsing urls from
22209 headers. Now we reply with Bad Request ("400"). Fixes bug 2767;
22210 bugfix on 0.0.6pre1.
22211 - In munge_extrainfo_into_routerinfo(), check the return value of
22212 memchr(). This would have been a serious issue if we ever passed
22213 it a non-extrainfo. Fixes bug 8791; bugfix on 0.2.0.6-alpha. Patch
22215 - On the chance that somebody manages to build Tor on a
22216 platform where time_t is unsigned, correct the way that
22217 microdesc_add_to_cache() handles negative time arguments.
22218 Fixes bug 8042; bugfix on 0.2.3.1-alpha.
22219 - Reject relative control socket paths and emit a warning. Previously,
22220 single-component control socket paths would be rejected, but Tor
22221 would not log why it could not validate the config. Fixes bug 9258;
22222 bugfix on 0.2.3.16-alpha.
22224 o Minor bugfixes (command line):
22225 - Use a single command-line parser for parsing torrc options on the
22226 command line and for finding special command-line options to avoid
22227 inconsistent behavior for torrc option arguments that have the same
22228 names as command-line options. Fixes bugs 4647 and 9578; bugfix on
22230 - No longer allow 'tor --hash-password' with no arguments. Fixes bug
22231 9573; bugfix on 0.0.9pre5.
22233 o Minor fixes (build, auxiliary programs):
22234 - Stop preprocessing the "torify" script with autoconf, since
22235 it no longer refers to LOCALSTATEDIR. Fixes bug 5505; patch
22237 - The tor-fw-helper program now follows the standard convention and
22238 exits with status code "0" on success. Fixes bug 9030; bugfix on
22239 0.2.3.1-alpha. Patch by Arlo Breault.
22240 - Corrected ./configure advice for what openssl dev package you should
22241 install on Debian. Fixes bug 9207; bugfix on 0.2.0.1-alpha.
22243 o Minor code improvements:
22244 - Remove constants and tests for PKCS1 padding; it's insecure and
22245 shouldn't be used for anything new. Fixes bug 8792; patch
22247 - Remove instances of strcpy() from the unit tests. They weren't
22248 hurting anything, since they were only in the unit tests, but it's
22249 embarrassing to have strcpy() in the code at all, and some analysis
22250 tools don't like it. Fixes bug 8790; bugfix on 0.2.3.6-alpha and
22251 0.2.3.8-alpha. Patch from Arlo Breault.
22253 o Removed features:
22254 - Remove migration code from when we renamed the "cached-routers"
22255 file to "cached-descriptors" back in 0.2.0.8-alpha. This
22256 incidentally resolves ticket 6502 by cleaning up the related code
22257 a bit. Patch from Akshay Hebbar.
22259 o Code simplification and refactoring:
22260 - Extract the common duplicated code for creating a subdirectory
22261 of the data directory and writing to a file in it. Fixes ticket
22262 4282; patch from Peter Retzlaff.
22263 - Since OpenSSL 0.9.7, the i2d_*() functions support allocating output
22264 buffer. Avoid calling twice: i2d_RSAPublicKey(), i2d_DHparams(),
22265 i2d_X509(), and i2d_PublicKey(). Resolves ticket 5170.
22266 - Add a set of accessor functions for the circuit timeout data
22267 structure. Fixes ticket 6153; patch from "piet".
22268 - Clean up exit paths from connection_listener_new(). Closes ticket
22269 8789. Patch from Arlo Breault.
22270 - Since we rely on OpenSSL 0.9.8 now, we can use EVP_PKEY_cmp()
22271 and drop our own custom pkey_eq() implementation. Fixes bug 9043.
22272 - Use a doubly-linked list to implement the global circuit list.
22273 Resolves ticket 9108. Patch from Marek Majkowski.
22274 - Remove contrib/id_to_fp.c since it wasn't used anywhere.
22277 Changes in version 0.2.4.17-rc - 2013-09-05
22278 Tor 0.2.4.17-rc is the third release candidate for the Tor 0.2.4.x
22279 series. It adds an emergency step to help us tolerate the massive
22280 influx of users: 0.2.4 clients using the new (faster and safer) "NTor"
22281 circuit-level handshakes now effectively jump the queue compared to
22282 the 0.2.3 clients using "TAP" handshakes. This release also fixes a
22283 big bug hindering bridge reachability tests.
22286 - Relays now process the new "NTor" circuit-level handshake requests
22287 with higher priority than the old "TAP" circuit-level handshake
22288 requests. We still process some TAP requests to not totally starve
22289 0.2.3 clients when NTor becomes popular. A new consensus parameter
22290 "NumNTorsPerTAP" lets us tune the balance later if we need to.
22291 Implements ticket 9574.
22294 - If the circuit build timeout logic is disabled (via the consensus,
22295 or because we are an authority), then don't build testing circuits.
22296 Fixes bug 9657; bugfix on 0.2.2.14-alpha.
22297 - Bridges now send AUTH_CHALLENGE cells during their v3 handshakes;
22298 previously they did not, which prevented them from receiving
22299 successful connections from relays for self-test or bandwidth
22300 testing. Also, when a relay is extending a circuit to a bridge,
22301 it needs to send a NETINFO cell, even when the bridge hasn't sent
22302 an AUTH_CHALLENGE cell. Fixes bug 9546; bugfix on 0.2.3.6-alpha.
22303 - If the time to download the next old-style networkstatus is in
22304 the future, do not decline to consider whether to download the
22305 next microdescriptor networkstatus. Fixes bug 9564; bugfix on
22309 - Avoid double-closing the listener socket in our socketpair()
22310 replacement (used on Windows) in the case where the addresses on
22311 our opened sockets don't match what we expected. Fixes bug 9400;
22312 bugfix on 0.0.2pre7. Found by Coverity.
22314 o Minor fixes (config options):
22315 - Avoid overflows when the user sets MaxCircuitDirtiness to a
22316 ridiculously high value, by imposing a (ridiculously high) 30-day
22317 maximum on MaxCircuitDirtiness.
22318 - Fix the documentation of HeartbeatPeriod to say that the heartbeat
22319 message is logged at notice, not at info.
22320 - Warn and fail if a server is configured not to advertise any
22321 ORPorts at all. (We need *something* to put in our descriptor,
22322 or we just won't work.)
22325 - Track how many "TAP" and "NTor" circuit handshake requests we get,
22326 and how many we complete, and log it every hour to help relay
22327 operators follow trends in network load. Addresses ticket 9658.
22328 - Update to the August 7 2013 Maxmind GeoLite Country database.
22331 Changes in version 0.2.4.16-rc - 2013-08-10
22332 Tor 0.2.4.16-rc is the second release candidate for the Tor 0.2.4.x
22333 series. It fixes several crash bugs in the 0.2.4 branch.
22336 - Fix a bug in the voting algorithm that could yield incorrect results
22337 when a non-naming authority declared too many flags. Fixes bug 9200;
22338 bugfix on 0.2.0.3-alpha.
22339 - Fix an uninitialized read that could in some cases lead to a remote
22340 crash while parsing INTRODUCE2 cells. Bugfix on 0.2.4.1-alpha.
22341 Anybody running a hidden service on the experimental 0.2.4.x
22342 branch should upgrade. (This is, so far as we know, unrelated to
22344 - Avoid an assertion failure when processing DNS replies without the
22345 answer types we expected. Fixes bug 9337; bugfix on 0.2.4.7-alpha.
22346 - Avoid a crash when using --hash-password. Fixes bug 9295; bugfix on
22347 0.2.4.15-rc. Found by stem integration tests.
22350 - Fix an invalid memory read that occurred when a pluggable
22351 transport proxy failed its configuration protocol.
22352 Fixes bug 9288; bugfix on 0.2.4.1-alpha.
22353 - When evaluating whether to use a connection that we haven't
22354 decided is canonical using a recent link protocol version,
22355 decide that it's canonical only if it used address _does_
22356 match the desired address. Fixes bug 9309; bugfix on
22357 0.2.4.4-alpha. Reported by skruffy.
22358 - Make the default behavior of NumDirectoryGuards be to track
22359 NumEntryGuards. Now a user who changes only NumEntryGuards will get
22360 the behavior she expects. Fixes bug 9354; bugfix on 0.2.4.8-alpha.
22361 - Fix a spurious compilation warning with some older versions of
22362 GCC on FreeBSD. Fixes bug 9254; bugfix on 0.2.4.14-alpha.
22365 - Update to the July 3 2013 Maxmind GeoLite Country database.
22368 Changes in version 0.2.4.15-rc - 2013-07-01
22369 Tor 0.2.4.15-rc is the first release candidate for the Tor 0.2.4.x
22370 series. It fixes a few smaller bugs, but generally appears stable.
22371 Please test it and let us know whether it is!
22374 - When receiving a new configuration file via the control port's
22375 LOADCONF command, do not treat the defaults file as absent.
22376 Fixes bug 9122; bugfix on 0.2.3.9-alpha.
22379 - Issue a warning when running with the bufferevents backend enabled.
22380 It's still not stable, and people should know that they're likely
22381 to hit unexpected problems. Closes ticket 9147.
22384 Changes in version 0.2.4.14-alpha - 2013-06-18
22385 Tor 0.2.4.14-alpha fixes a pair of client guard enumeration problems
22386 present in 0.2.4.13-alpha.
22389 - When we have too much memory queued in circuits (according to a new
22390 MaxMemInCellQueues option), close the circuits consuming the most
22391 memory. This prevents us from running out of memory as a relay if
22392 circuits fill up faster than they can be drained. Fixes bug 9063;
22393 bugfix on the 54th commit of Tor. This bug is a further fix beyond
22394 bug 6252, whose fix was merged into 0.2.3.21-rc.
22396 This change also fixes an earlier approach taken in 0.2.4.13-alpha,
22397 where we tried to solve this issue simply by imposing an upper limit
22398 on the number of queued cells for a single circuit. That approach
22399 proved to be problematic, since there are ways to provoke clients to
22400 send a number of cells in excess of any such reasonable limit. Fixes
22401 bug 9072; bugfix on 0.2.4.13-alpha.
22403 - Limit hidden service descriptors to at most ten introduction
22404 points, to slow one kind of guard enumeration. Fixes bug 9002;
22405 bugfix on 0.1.1.11-alpha.
22408 Changes in version 0.2.4.13-alpha - 2013-06-14
22409 Tor 0.2.4.13-alpha fixes a variety of potential remote crash
22410 vulnerabilities, makes socks5 username/password circuit isolation
22411 actually actually work (this time for sure!), and cleans up a bunch
22412 of other issues in preparation for a release candidate.
22414 o Major bugfixes (robustness):
22415 - Close any circuit that has too many cells queued on it. Fixes
22416 bug 9063; bugfix on the 54th commit of Tor. This bug is a further
22417 fix beyond bug 6252, whose fix was merged into 0.2.3.21-rc.
22418 - Prevent the get_freelists() function from running off the end of
22419 the list of freelists if it somehow gets an unrecognized
22420 allocation. Fixes bug 8844; bugfix on 0.2.0.16-alpha. Reported by
22422 - Avoid an assertion failure on OpenBSD (and perhaps other BSDs)
22423 when an exit connection with optimistic data succeeds immediately
22424 rather than returning EINPROGRESS. Fixes bug 9017; bugfix on
22426 - Fix a directory authority crash bug when building a consensus
22427 using an older consensus as its basis. Fixes bug 8833. Bugfix
22431 - Avoid a memory leak where we would leak a consensus body when we
22432 find that a consensus which we couldn't previously verify due to
22433 missing certificates is now verifiable. Fixes bug 8719; bugfix
22435 - We used to always request authority certificates by identity digest,
22436 meaning we'd get the newest one even when we wanted one with a
22437 different signing key. Then we would complain about being given
22438 a certificate we already had, and never get the one we really
22439 wanted. Now we use the "fp-sk/" resource as well as the "fp/"
22440 resource to request the one we want. Fixes bug 5595; bugfix on
22442 - Follow the socks5 protocol when offering username/password
22443 authentication. The fix for bug 8117 exposed this bug, and it
22444 turns out real-world applications like Pidgin do care. Bugfix on
22445 0.2.3.2-alpha; fixes bug 8879.
22446 - Prevent failures on Windows Vista and later when rebuilding the
22447 microdescriptor cache. Diagnosed by Robert Ransom. Fixes bug 8822;
22448 bugfix on 0.2.4.12-alpha.
22451 - Fix an impossible buffer overrun in the AES unit tests. Fixes
22452 bug 8845; bugfix on 0.2.0.7-alpha. Found by eugenis.
22453 - If for some reason we fail to write a microdescriptor while
22454 rebuilding the cache, do not let the annotations from that
22455 microdescriptor linger in the cache file, and do not let the
22456 microdescriptor stay recorded as present in its old location.
22457 Fixes bug 9047; bugfix on 0.2.2.6-alpha.
22458 - Fix a memory leak that would occur whenever a configuration
22459 option changed. Fixes bug 8718; bugfix on 0.2.3.3-alpha.
22460 - Paste the description for PathBias parameters from the man
22461 page into or.h, so the code documents them too. Fixes bug 7982;
22462 bugfix on 0.2.3.17-beta and 0.2.4.8-alpha.
22463 - Relays now treat a changed IPv6 ORPort as sufficient reason to
22464 publish an updated descriptor. Fixes bug 6026; bugfix on
22466 - When launching a resolve request on behalf of an AF_UNIX control
22467 socket, omit the address field of the new entry connection, used in
22468 subsequent controller events, rather than letting tor_dup_addr()
22469 set it to "<unknown address type>". Fixes bug 8639; bugfix on
22472 o Minor bugfixes (log messages):
22473 - Fix a scaling issue in the path bias accounting code that
22474 resulted in "Bug:" log messages from either
22475 pathbias_scale_close_rates() or pathbias_count_build_success().
22476 This represents a bugfix on a previous bugfix: the original fix
22477 attempted in 0.2.4.10-alpha was incomplete. Fixes bug 8235; bugfix
22479 - Give a less useless error message when the user asks for an IPv4
22480 address on an IPv6-only port, or vice versa. Fixes bug 8846; bugfix
22484 - Downgrade "unexpected SENDME" warnings to protocol-warn for 0.2.4.x,
22485 to tolerate bug 8093 for now.
22486 - Add an "ignoring-advertised-bws" boolean to the flag-threshold lines
22487 in directory authority votes to describe whether they have enough
22488 measured bandwidths to ignore advertised (relay descriptor)
22489 bandwidth claims. Resolves ticket 8711.
22490 - Update to the June 5 2013 Maxmind GeoLite Country database.
22492 o Removed documentation:
22493 - Remove some of the older contents of doc/ as obsolete; move others
22494 to torspec.git. Fixes bug 8965.
22496 o Code simplification and refactoring:
22497 - Avoid using character buffers when constructing most directory
22498 objects: this approach was unwieldy and error-prone. Instead,
22499 build smartlists of strings, and concatenate them when done.
22502 Changes in version 0.2.4.12-alpha - 2013-04-18
22503 Tor 0.2.4.12-alpha moves Tor forward on several fronts: it starts the
22504 process for lengthening the guard rotation period, makes directory
22505 authority opinions in the consensus a bit less gameable, makes socks5
22506 username/password circuit isolation actually work, and fixes a wide
22507 variety of other issues.
22510 - Raise the default time that a client keeps an entry guard from
22511 "1-2 months" to "2-3 months", as suggested by Tariq Elahi's WPES
22512 2012 paper. (We would make it even longer, but we need better client
22513 load balancing first.) Also, make the guard lifetime controllable
22514 via a new GuardLifetime torrc option and a GuardLifetime consensus
22515 parameter. Start of a fix for bug 8240; bugfix on 0.1.1.11-alpha.
22516 - Directory authorities now prefer using measured bandwidths to
22517 advertised ones when computing flags and thresholds. Resolves
22519 - Directory authorities that have more than a threshold number
22520 of relays with measured bandwidths now treat relays with unmeasured
22521 bandwidths as having bandwidth 0. Resolves ticket 8435.
22523 o Major bugfixes (assert / resource use):
22524 - Avoid a bug where our response to TLS renegotiation under certain
22525 network conditions could lead to a busy-loop, with 100% CPU
22526 consumption. Fixes bug 5650; bugfix on 0.2.0.16-alpha.
22527 - Avoid an assertion when we discover that we'd like to write a cell
22528 onto a closing connection: just discard the cell. Fixes another
22529 case of bug 7350; bugfix on 0.2.4.4-alpha.
22531 o Major bugfixes (client-side privacy):
22532 - When we mark a circuit as unusable for new circuits, have it
22533 continue to be unusable for new circuits even if MaxCircuitDirtiness
22534 is increased too much at the wrong time, or the system clock jumps
22535 backwards. Fixes bug 6174; bugfix on 0.0.2pre26.
22536 - If ClientDNSRejectInternalAddresses ("do not believe DNS queries
22537 which have resolved to internal addresses") is set, apply that
22538 rule to IPv6 as well. Fixes bug 8475; bugfix on 0.2.0.7-alpha.
22539 - When an exit relay rejects a stream with reason "exit policy", but
22540 we only know an exit policy summary (e.g. from the microdesc
22541 consensus) for it, do not mark the relay as useless for all exiting.
22542 Instead, mark just the circuit as unsuitable for that particular
22543 address. Fixes part of bug 7582; bugfix on 0.2.3.2-alpha.
22544 - Allow applications to get proper stream isolation with
22545 IsolateSOCKSAuth. Many SOCKS5 clients that want to offer
22546 username/password authentication also offer "no authentication". Tor
22547 had previously preferred "no authentication", so the applications
22548 never actually sent Tor their auth details. Now Tor selects
22549 username/password authentication if it's offered. You can disable
22550 this behavior on a per-SOCKSPort basis via PreferSOCKSNoAuth. Fixes
22551 bug 8117; bugfix on 0.2.3.3-alpha.
22553 o Major bugfixes (other):
22554 - When unable to find any working directory nodes to use as a
22555 directory guard, give up rather than adding the same non-working
22556 nodes to the directory guard list over and over. Fixes bug 8231;
22557 bugfix on 0.2.4.8-alpha.
22560 - Reject as invalid most directory objects containing a NUL.
22561 Belt-and-suspender fix for bug 8037.
22562 - In our testsuite, create temporary directories with a bit more
22563 entropy in their name to make name collisions less likely. Fixes
22565 - Add CACHED keyword to ADDRMAP events in the control protocol
22566 to indicate whether a DNS result will be cached or not. Resolves
22568 - Update to the April 3 2013 Maxmind GeoLite Country database.
22570 o Minor features (build):
22571 - Detect and reject attempts to build Tor with threading support
22572 when OpenSSL has been compiled without threading support.
22574 - Clarify that when autoconf is checking for nacl, it is checking
22575 specifically for nacl with a fast curve25519 implementation.
22577 - Warn if building on a platform with an unsigned time_t: there
22578 are too many places where Tor currently assumes that time_t can
22579 hold negative values. We'd like to fix them all, but probably
22582 o Minor bugfixes (build):
22583 - Fix some bugs in tor-fw-helper-natpmp when trying to build and
22584 run it on Windows. More bugs likely remain. Patch from Gisle Vanem.
22585 Fixes bug 7280; bugfix on 0.2.3.1-alpha.
22586 - Add the old src/or/micro-revision.i filename to CLEANFILES.
22587 On the off chance that somebody has one, it will go away as soon
22588 as they run "make clean". Fix for bug 7143; bugfix on 0.2.4.1-alpha.
22589 - Build Tor correctly on 32-bit platforms where the compiler can build
22590 but not run code using the "uint128_t" construction. Fixes bug 8587;
22591 bugfix on 0.2.4.8-alpha.
22592 - Fix compilation warning with some versions of clang that would
22593 prefer the -Wswitch-enum compiler flag to warn about switch
22594 statements with missing enum values, even if those switch
22595 statements have a "default:" statement. Fixes bug 8598; bugfix
22598 o Minor bugfixes (protocol):
22599 - Fix the handling of a TRUNCATE cell when it arrives while the
22600 circuit extension is in progress. Fixes bug 7947; bugfix on 0.0.7.1.
22601 - Fix a misframing issue when reading the version numbers in a
22602 VERSIONS cell. Previously we would recognize [00 01 00 02] as
22603 'version 1, version 2, and version 0x100', when it should have
22604 only included versions 1 and 2. Fixes bug 8059; bugfix on
22605 0.2.0.10-alpha. Reported pseudonymously.
22606 - Make the format and order of STREAM events for DNS lookups
22607 consistent among the various ways to launch DNS lookups. Fixes
22608 bug 8203; bugfix on 0.2.0.24-rc. Patch by "Desoxy".
22609 - Correct our check for which versions of Tor support the EXTEND2
22610 cell. We had been willing to send it to Tor 0.2.4.7-alpha and
22611 later, when support was really added in version 0.2.4.8-alpha.
22612 Fixes bug 8464; bugfix on 0.2.4.8-alpha.
22614 o Minor bugfixes (other):
22615 - Correctly store microdescriptors and extrainfo descriptors with
22616 an internal NUL byte. Fixes bug 8037; bugfix on 0.2.0.1-alpha.
22617 Bug reported by "cypherpunks".
22618 - Increase the width of the field used to remember a connection's
22619 link protocol version to two bytes. Harmless for now, since the
22620 only currently recognized versions are one byte long. Reported
22621 pseudonymously. Fixes bug 8062; bugfix on 0.2.0.10-alpha.
22622 - If the state file's path bias counts are invalid (presumably from a
22623 buggy Tor prior to 0.2.4.10-alpha), make them correct. Also add
22624 additional checks and log messages to the scaling of Path Bias
22625 counts, in case there still are remaining issues with scaling.
22626 Should help resolve bug 8235.
22627 - Eliminate several instances where we use "Nickname=ID" to refer to
22628 nodes in logs. Use "Nickname (ID)" instead. (Elsewhere, we still use
22629 "$ID=Nickname", which is also acceptable.) Fixes bug 7065. Bugfix
22630 on 0.2.3.21-rc, 0.2.4.5-alpha, 0.2.4.8-alpha, and 0.2.4.10-alpha.
22632 o Minor bugfixes (syscalls):
22633 - Always check the return values of functions fcntl() and
22634 setsockopt(). We don't believe these are ever actually failing in
22635 practice, but better safe than sorry. Also, checking these return
22636 values should please analysis tools like Coverity. Patch from
22637 'flupzor'. Fixes bug 8206; bugfix on all versions of Tor.
22638 - Use direct writes rather than stdio when building microdescriptor
22639 caches, in an attempt to mitigate bug 8031, or at least make it
22642 o Minor bugfixes (config):
22643 - When rejecting a configuration because we were unable to parse a
22644 quoted string, log an actual error message. Fixes bug 7950; bugfix
22646 - Behave correctly when the user disables LearnCircuitBuildTimeout
22647 but doesn't tell us what they would like the timeout to be. Fixes
22648 bug 6304; bugfix on 0.2.2.14-alpha.
22649 - When autodetecting the number of CPUs, use the number of available
22650 CPUs in preference to the number of configured CPUs. Inform the
22651 user if this reduces the number of available CPUs. Fixes bug 8002;
22652 bugfix on 0.2.3.1-alpha.
22653 - Make it an error when you set EntryNodes but disable UseGuardNodes,
22654 since it will (surprisingly to some users) ignore EntryNodes. Fixes
22655 bug 8180; bugfix on 0.2.3.11-alpha.
22656 - Allow TestingTorNetworks to override the 4096-byte minimum for
22657 the Fast threshold. Otherwise they can't bootstrap until they've
22658 observed more traffic. Fixes bug 8508; bugfix on 0.2.4.10-alpha.
22659 - Fix some logic errors when the user manually overrides the
22660 PathsNeededToBuildCircuits option in torrc. Fixes bug 8599; bugfix
22663 o Minor bugfixes (log messages to help diagnose bugs):
22664 - If we fail to free a microdescriptor because of bug 7164, log
22665 the filename and line number from which we tried to free it.
22666 - Add another diagnostic to the heartbeat message: track and log
22667 overhead that TLS is adding to the data we write. If this is
22668 high, we are sending too little data to SSL_write at a time.
22669 Diagnostic for bug 7707.
22670 - Add more detail to a log message about relaxed timeouts, to help
22672 - Warn more aggressively when flushing microdescriptors to a
22673 microdescriptor cache fails, in an attempt to mitigate bug 8031,
22674 or at least make it more diagnosable.
22675 - Improve debugging output to help track down bug 8185 ("Bug:
22676 outgoing relay cell has n_chan==NULL. Dropping.")
22677 - Log the purpose of a path-bias testing circuit correctly.
22678 Improves a log message from bug 8477; bugfix on 0.2.4.8-alpha.
22680 o Minor bugfixes (0.2.4.x log messages that were too noisy):
22681 - Don't attempt to relax the timeout of already opened 1-hop circuits.
22682 They might never timeout. This should eliminate some/all cases of
22683 the relaxed timeout log message.
22684 - Use circuit creation time for network liveness evaluation. This
22685 should eliminate warning log messages about liveness caused
22686 by changes in timeout evaluation. Fixes bug 6572; bugfix on
22688 - Reduce a path bias length check from notice to info. The message
22689 is triggered when creating controller circuits. Fixes bug 8196;
22690 bugfix on 0.2.4.8-alpha.
22691 - Fix a path state issue that triggered a notice during relay startup.
22692 Fixes bug 8320; bugfix on 0.2.4.10-alpha.
22693 - Reduce occurrences of warns about circuit purpose in
22694 connection_ap_expire_building(). Fixes bug 8477; bugfix on
22697 o Minor bugfixes (pre-0.2.4.x log messages that were too noisy):
22698 - If we encounter a write failure on a SOCKS connection before we
22699 finish our SOCKS handshake, don't warn that we closed the
22700 connection before we could send a SOCKS reply. Fixes bug 8427;
22701 bugfix on 0.1.0.1-rc.
22702 - Correctly recognize that [::1] is a loopback address. Fixes
22703 bug 8377; bugfix on 0.2.1.3-alpha.
22704 - Fix a directory authority warn caused when we have a large amount
22705 of badexit bandwidth. Fixes bug 8419; bugfix on 0.2.2.10-alpha.
22706 - Don't log inappropriate heartbeat messages when hibernating: a
22707 hibernating node is _expected_ to drop out of the consensus,
22708 decide it isn't bootstrapped, and so forth. Fixes bug 7302;
22709 bugfix on 0.2.3.1-alpha.
22710 - Don't complain about bootstrapping problems while hibernating.
22711 These complaints reflect a general code problem, but not one
22712 with any problematic effects (no connections are actually
22713 opened). Fixes part of bug 7302; bugfix on 0.2.3.2-alpha.
22715 o Documentation fixes:
22716 - Update tor-fw-helper.1.txt and tor-fw-helper.c to make option
22717 names match. Fixes bug 7768.
22718 - Make the torify manpage no longer refer to tsocks; torify hasn't
22719 supported tsocks since 0.2.3.14-alpha.
22720 - Make the tor manpage no longer reference tsocks.
22721 - Fix the GeoIPExcludeUnknown documentation to refer to
22722 ExcludeExitNodes rather than the currently nonexistent
22723 ExcludeEntryNodes. Spotted by "hamahangi" on tor-talk.
22726 - The tor-tsocks.conf is no longer distributed or installed. We
22727 recommend that tsocks users use torsocks instead. Resolves
22731 Changes in version 0.2.4.11-alpha - 2013-03-11
22732 Tor 0.2.4.11-alpha makes relay measurement by directory authorities
22733 more robust, makes hidden service authentication work again, and
22734 resolves a DPI fingerprint for Tor's SSL transport.
22736 o Major features (directory authorities):
22737 - Directory authorities now support a new consensus method (17)
22738 where they cap the published bandwidth of servers for which
22739 insufficient bandwidth measurements exist. Fixes part of bug 2286.
22740 - Directory authorities that set "DisableV2DirectoryInfo_ 1" no longer
22741 serve any v2 directory information. Now we can test disabling the
22742 old deprecated v2 directory format, and see whether doing so has
22743 any effect on network load. Begins to fix bug 6783.
22744 - Directory authorities now include inside each vote a statement of
22745 the performance thresholds they used when assigning flags.
22746 Implements ticket 8151.
22748 o Major bugfixes (directory authorities):
22749 - Stop marking every relay as having been down for one hour every
22750 time we restart a directory authority. These artificial downtimes
22751 were messing with our Stable and Guard flag calculations. Fixes
22752 bug 8218 (introduced by the fix for 1035). Bugfix on 0.2.2.23-alpha.
22754 o Major bugfixes (hidden services):
22755 - Allow hidden service authentication to succeed again. When we
22756 refactored the hidden service introduction code back
22757 in 0.2.4.1-alpha, we didn't update the code that checks
22758 whether authentication information is present, causing all
22759 authentication checks to return "false". Fix for bug 8207; bugfix
22760 on 0.2.4.1-alpha. Found by Coverity; this is CID 718615.
22762 o Minor features (relays, bridges):
22763 - Make bridge relays check once a minute for whether their IP
22764 address has changed, rather than only every 15 minutes. Resolves
22765 bugs 1913 and 1992.
22766 - Refactor resolve_my_address() so it returns the method by which we
22767 decided our public IP address (explicitly configured, resolved from
22768 explicit hostname, guessed from interfaces, learned by gethostname).
22769 Now we can provide more helpful log messages when a relay guesses
22770 its IP address incorrectly (e.g. due to unexpected lines in
22771 /etc/hosts). Resolves ticket 2267.
22772 - Teach bridge-using clients to avoid 0.2.2 bridges when making
22773 microdescriptor-related dir requests, and only fall back to normal
22774 descriptors if none of their bridges can handle microdescriptors
22775 (as opposed to the fix in ticket 4013, which caused them to fall
22776 back to normal descriptors if *any* of their bridges preferred
22777 them). Resolves ticket 4994.
22778 - Randomize the lifetime of our SSL link certificate, so censors can't
22779 use the static value for filtering Tor flows. Resolves ticket 8443;
22780 related to ticket 4014 which was included in 0.2.2.33.
22781 - Support a new version of the link protocol that allows 4-byte circuit
22782 IDs. Previously, circuit IDs were limited to 2 bytes, which presented
22783 a possible resource exhaustion issue. Closes ticket 7351; implements
22786 o Minor features (portability):
22787 - Tweak the curve25519-donna*.c implementations to tolerate systems
22788 that lack stdint.h. Fixes bug 3894; bugfix on 0.2.4.8-alpha.
22789 - Use Ville Laurikari's implementation of AX_CHECK_SIGN() to determine
22790 the signs of types during autoconf. This is better than our old
22791 approach, which didn't work when cross-compiling.
22792 - Detect the sign of enum values, rather than assuming that MSC is the
22793 only compiler where enum types are all signed. Fixes bug 7727;
22794 bugfix on 0.2.4.10-alpha.
22796 o Minor features (other):
22797 - Say "KBytes" rather than "KB" in the man page (for various values
22798 of K), to further reduce confusion about whether Tor counts in
22799 units of memory or fractions of units of memory. Resolves ticket 7054.
22800 - Clear the high bit on curve25519 public keys before passing them to
22801 our backend, in case we ever wind up using a backend that doesn't do
22802 so itself. If we used such a backend, and *didn't* clear the high bit,
22803 we could wind up in a situation where users with such backends would
22804 be distinguishable from users without. Fixes bug 8121; bugfix on
22806 - Update to the March 6 2013 Maxmind GeoLite Country database.
22808 o Minor bugfixes (clients):
22809 - When we receive a RELAY_END cell with the reason DONE, or with no
22810 reason, before receiving a RELAY_CONNECTED cell, report the SOCKS
22811 status as "connection refused". Previously we reported these cases
22812 as success but then immediately closed the connection. Fixes bug
22813 7902; bugfix on 0.1.0.1-rc. Reported by "oftc_must_be_destroyed".
22814 - Downgrade an assertion in connection_ap_expire_beginning to an
22815 LD_BUG message. The fix for bug 8024 should prevent this message
22816 from displaying, but just in case, a warn that we can diagnose
22817 is better than more assert crashes. Fixes bug 8065; bugfix on
22819 - Lower path use bias thresholds to .80 for notice and .60 for warn.
22820 Also make the rate limiting flags for the path use bias log messages
22821 independent from the original path bias flags. Fixes bug 8161;
22822 bugfix on 0.2.4.10-alpha.
22824 o Minor bugfixes (relays):
22825 - Stop trying to resolve our hostname so often (e.g. every time we
22826 think about doing a directory fetch). Now we reuse the cached
22827 answer in some cases. Fixes bugs 1992 (bugfix on 0.2.0.20-rc)
22828 and 2410 (bugfix on 0.1.2.2-alpha).
22829 - Stop sending a stray "(null)" in some cases for the server status
22830 "EXTERNAL_ADDRESS" controller event. Resolves bug 8200; bugfix
22832 - When choosing which stream on a formerly stalled circuit to wake
22833 first, make better use of the platform's weak RNG. Previously,
22834 we had been using the % ("modulo") operator to try to generate a
22835 1/N chance of picking each stream, but this behaves badly with
22836 many platforms' choice of weak RNG. Fixes bug 7801; bugfix on
22838 - Use our own weak RNG when we need a weak RNG. Windows's rand() and
22839 Irix's random() only return 15 bits; Solaris's random() returns more
22840 bits but its RAND_MAX says it only returns 15, and so on. Motivated
22841 by the fix for bug 7801; bugfix on 0.2.2.20-alpha.
22843 o Minor bugfixes (directory authorities):
22844 - Directory authorities now use less space when formatting identical
22845 microdescriptor lines in directory votes. Fixes bug 8158; bugfix
22848 o Minor bugfixes (memory leaks spotted by Coverity -- bug 7816):
22849 - Avoid leaking memory if we fail to compute a consensus signature
22850 or we generate a consensus we can't parse. Bugfix on 0.2.0.5-alpha.
22851 - Fix a memory leak when receiving headers from an HTTPS proxy. Bugfix
22853 - Fix a memory leak during safe-cookie controller authentication.
22854 Bugfix on 0.2.3.13-alpha.
22855 - Avoid memory leak of IPv6 policy content if we fail to format it into
22856 a router descriptor. Bugfix on 0.2.4.7-alpha.
22858 o Minor bugfixes (other code correctness issues):
22859 - Avoid a crash if we fail to generate an extrainfo descriptor.
22860 Fixes bug 8208; bugfix on 0.2.3.16-alpha. Found by Coverity;
22861 this is CID 718634.
22862 - When detecting the largest possible file descriptor (in order to
22863 close all file descriptors when launching a new program), actually
22864 use _SC_OPEN_MAX. The old code for doing this was very, very broken.
22865 Fixes bug 8209; bugfix on 0.2.3.1-alpha. Found by Coverity; this
22867 - Fix a copy-and-paste error when adding a missing A1 to a routerset
22868 because of GeoIPExcludeUnknown. Fix for Coverity CID 980650.
22869 Bugfix on 0.2.4.10-alpha.
22870 - Fix an impossible-to-trigger integer overflow when estimating how
22871 long our onionskin queue would take. (This overflow would require us
22872 to accept 4 million onionskins before processing 100 of them.) Fixes
22873 bug 8210; bugfix on 0.2.4.10-alpha.
22875 o Code simplification and refactoring:
22876 - Add a wrapper function for the common "log a message with a
22880 Changes in version 0.2.4.10-alpha - 2013-02-04
22881 Tor 0.2.4.10-alpha adds defenses at the directory authority level from
22882 certain attacks that flood the network with relays; changes the queue
22883 for circuit create requests from a sized-based limit to a time-based
22884 limit; resumes building with MSVC on Windows; and fixes a wide variety
22887 o Major bugfixes (directory authority):
22888 - When computing directory thresholds, ignore any rejected-as-sybil
22889 nodes during the computation so that they can't influence Fast,
22890 Guard, etc. (We should have done this for proposal 109.) Fixes
22892 - When marking a node as a likely sybil, reset its uptime metrics
22893 to zero, so that it cannot time towards getting marked as Guard,
22894 Stable, or HSDir. (We should have done this for proposal 109.) Fixes
22898 - When a TLS write is partially successful but incomplete, remember
22899 that the flushed part has been flushed, and notice that bytes were
22900 actually written. Reported and fixed pseudonymously. Fixes bug
22901 7708; bugfix on Tor 0.1.0.5-rc.
22902 - Reject bogus create and relay cells with 0 circuit ID or 0 stream
22903 ID: these could be used to create unexpected streams and circuits
22904 which would count as "present" to some parts of Tor but "absent"
22905 to others, leading to zombie circuits and streams or to a bandwidth
22906 denial-of-service. Fixes bug 7889; bugfix on every released version
22907 of Tor. Reported by "oftc_must_be_destroyed".
22908 - Rename all macros in our local copy of queue.h to begin with "TOR_".
22909 This change seems the only good way to permanently prevent conflicts
22910 with queue.h on various operating systems. Fixes bug 8107; bugfix
22913 o Major features (relay):
22914 - Instead of limiting the number of queued onionskins (aka circuit
22915 create requests) to a fixed, hard-to-configure number, we limit
22916 the size of the queue based on how many we expect to be able to
22917 process in a given amount of time. We estimate the time it will
22918 take to process an onionskin based on average processing time
22919 of previous onionskins. Closes ticket 7291. You'll never have to
22920 configure MaxOnionsPending again.
22922 o Major features (portability):
22923 - Resume building correctly with MSVC and Makefile.nmake. This patch
22924 resolves numerous bugs and fixes reported by ultramage, including
22925 7305, 7308, 7309, 7310, 7312, 7313, 7315, 7316, and 7669.
22926 - Make the ntor and curve25519 code build correctly with MSVC.
22927 Fix on 0.2.4.8-alpha.
22930 - When directory authorities are computing thresholds for flags,
22931 never let the threshold for the Fast flag fall below 4096
22932 bytes. Also, do not consider nodes with extremely low bandwidths
22933 when deciding thresholds for various directory flags. This change
22934 should raise our threshold for Fast relays, possibly in turn
22935 improving overall network performance; see ticket 1854. Resolves
22937 - The Tor client now ignores sub-domain components of a .onion
22938 address. This change makes HTTP "virtual" hosting
22939 possible: http://foo.aaaaaaaaaaaaaaaa.onion/ and
22940 http://bar.aaaaaaaaaaaaaaaa.onion/ can be two different websites
22941 hosted on the same hidden service. Implements proposal 204.
22942 - We compute the overhead from passing onionskins back and forth to
22943 cpuworkers, and report it when dumping statistics in response to
22944 SIGUSR1. Supports ticket 7291.
22946 o Minor features (path selection):
22947 - When deciding whether we have enough descriptors to build circuits,
22948 instead of looking at raw relay counts, look at which fraction
22949 of (bandwidth-weighted) paths we're able to build. This approach
22950 keeps clients from building circuits if their paths are likely to
22951 stand out statistically. The default fraction of paths needed is
22952 taken from the consensus directory; you can override it with the
22953 new PathsNeededToBuildCircuits option. Fixes ticket 5956.
22954 - When any country code is listed in ExcludeNodes or ExcludeExitNodes,
22955 and we have GeoIP information, also exclude all nodes with unknown
22956 countries "??" and "A1". This behavior is controlled by the
22957 new GeoIPExcludeUnknown option: you can make such nodes always
22958 excluded with "GeoIPExcludeUnknown 1", and disable the feature
22959 with "GeoIPExcludeUnknown 0". Setting "GeoIPExcludeUnknown auto"
22960 gets you the default behavior. Implements feature 7706.
22961 - Path Use Bias: Perform separate accounting for successful circuit
22962 use. Keep separate statistics on stream attempt rates versus stream
22963 success rates for each guard. Provide configurable thresholds to
22964 determine when to emit log messages or disable use of guards that
22965 fail too many stream attempts. Resolves ticket 7802.
22967 o Minor features (log messages):
22968 - When learning a fingerprint for a bridge, log its corresponding
22969 transport type. Implements ticket 7896.
22970 - Improve the log message when "Bug/attack: unexpected sendme cell
22971 from client" occurs, to help us track bug 8093.
22974 - Remove a couple of extraneous semicolons that were upsetting the
22975 cparser library. Patch by Christian Grothoff. Fixes bug 7115;
22976 bugfix on 0.2.2.1-alpha.
22977 - Remove a source of rounding error during path bias count scaling;
22978 don't count cannibalized circuits as used for path bias until we
22979 actually try to use them; and fix a circuit_package_relay_cell()
22980 warning message about n_chan==NULL. Fixes bug 7802.
22981 - Detect nacl when its headers are in a nacl/ subdirectory. Also,
22982 actually link against nacl when we're configured to use it. Fixes
22983 bug 7972; bugfix on 0.2.4.8-alpha.
22984 - Compile correctly with the --disable-curve25519 option. Fixes
22985 bug 8153; bugfix on 0.2.4.8-alpha.
22987 o Build improvements:
22988 - Do not report status verbosely from autogen.sh unless the -v flag
22989 is specified. Fixes issue 4664. Patch from Onizuka.
22990 - Replace all calls to snprintf() outside of src/ext with
22991 tor_snprintf(). Also remove the #define to replace snprintf with
22992 _snprintf on Windows; they have different semantics, and all of
22993 our callers should be using tor_snprintf() anyway. Fixes bug 7304.
22994 - Try to detect if we are ever building on a platform where
22995 memset(...,0,...) does not set the value of a double to 0.0. Such
22996 platforms are permitted by the C standard, though in practice
22997 they're pretty rare (since IEEE 754 is nigh-ubiquitous). We don't
22998 currently support them, but it's better to detect them and fail
22999 than to perform erroneously.
23001 o Removed features:
23002 - Stop exporting estimates of v2 and v3 directory traffic shares
23003 in extrainfo documents. They were unneeded and sometimes inaccurate.
23004 Also stop exporting any v2 directory request statistics. Resolves
23006 - Drop support for detecting and warning about versions of Libevent
23007 before 1.3e. Nothing reasonable ships with them any longer;
23008 warning the user about them shouldn't be needed. Resolves ticket
23011 o Code simplifications and refactoring:
23012 - Rename "isin" functions to "contains", for grammar. Resolves
23014 - Rename Tor's logging function log() to tor_log(), to avoid conflicts
23015 with the natural logarithm function from the system libm. Resolves
23019 Changes in version 0.2.4.9-alpha - 2013-01-15
23020 Tor 0.2.4.9-alpha provides a quick fix to make the new ntor handshake
23021 work more robustly.
23024 - Fix backward compatibility logic when receiving an embedded ntor
23025 handshake tunneled in a CREATE cell. This clears up the "Bug:
23026 couldn't format CREATED cell" warning. Fixes bug 7959; bugfix
23030 Changes in version 0.2.4.8-alpha - 2013-01-14
23031 Tor 0.2.4.8-alpha introduces directory guards to reduce user enumeration
23032 risks, adds a new stronger and faster circuit handshake, and offers
23033 stronger and faster link encryption when both sides support it.
23036 - Preliminary support for directory guards (proposal 207): when
23037 possible, clients now use their entry guards for non-anonymous
23038 directory requests. This can help prevent client enumeration. Note
23039 that this behavior only works when we have a usable consensus
23040 directory, and when options about what to download are more or less
23041 standard. In the future we should re-bootstrap from our guards,
23042 rather than re-bootstrapping from the preconfigured list of
23043 directory sources that ships with Tor. Resolves ticket 6526.
23044 - Tor relays and clients now support a better CREATE/EXTEND cell
23045 format, allowing the sender to specify multiple address, identity,
23046 and handshake types. Implements Robert Ransom's proposal 200;
23047 closes ticket 7199.
23049 o Major features (new circuit handshake):
23050 - Tor now supports a new circuit extension handshake designed by Ian
23051 Goldberg, Douglas Stebila, and Berkant Ustaoglu. Our original
23052 circuit extension handshake, later called "TAP", was a bit slow
23053 (especially on the relay side), had a fragile security proof, and
23054 used weaker keys than we'd now prefer. The new circuit handshake
23055 uses Dan Bernstein's "curve25519" elliptic-curve Diffie-Hellman
23056 function, making it significantly more secure than the older
23057 handshake, and significantly faster. Tor can use one of two built-in
23058 pure-C curve25519-donna implementations by Adam Langley, or it
23059 can link against the "nacl" library for a tuned version if present.
23061 The built-in version is very fast for 64-bit systems when building
23062 with GCC. The built-in 32-bit version is still faster than the
23063 old TAP protocol, but using libnacl is better on most such hosts.
23065 Clients don't currently use this protocol by default, since
23066 comparatively few clients support it so far. To try it, set
23067 UseNTorHandshake to 1.
23069 Implements proposal 216; closes ticket 7202.
23071 o Major features (better link encryption):
23072 - Relays can now enable the ECDHE TLS ciphersuites when available
23073 and appropriate. These ciphersuites let us negotiate forward-secure
23074 TLS secret keys more safely and more efficiently than with our
23075 previous use of Diffie-Hellman modulo a 1024-bit prime. By default,
23076 public relays prefer the (faster) P224 group, and bridges prefer
23077 the (more common) P256 group; you can override this with the
23080 Enabling these ciphers was a little tricky, since for a long time,
23081 clients had been claiming to support them without actually doing
23082 so, in order to foil fingerprinting. But with the client-side
23083 implementation of proposal 198 in 0.2.3.17-beta, clients can now
23084 match the ciphers from recent Firefox versions *and* list the
23085 ciphers they actually mean, so relays can believe such clients
23086 when they advertise ECDHE support in their TLS ClientHello messages.
23088 This feature requires clients running 0.2.3.17-beta or later,
23089 and requires both sides to be running OpenSSL 1.0.0 or later
23090 with ECC support. OpenSSL 1.0.1, with the compile-time option
23091 "enable-ec_nistp_64_gcc_128", is highly recommended.
23093 Implements the relay side of proposal 198; closes ticket 7200.
23096 - Avoid crashing when, as a relay without IPv6-exit support, a
23097 client insists on getting an IPv6 address or nothing. Fixes bug
23098 7814; bugfix on 0.2.4.7-alpha.
23101 - Improve circuit build timeout handling for hidden services.
23102 In particular: adjust build timeouts more accurately depending
23103 upon the number of hop-RTTs that a particular circuit type
23104 undergoes. Additionally, launch intro circuits in parallel
23105 if they timeout, and take the first one to reply as valid.
23106 - Work correctly on Unix systems where EAGAIN and EWOULDBLOCK are
23107 separate error codes; or at least, don't break for that reason.
23108 Fixes bug 7935. Reported by "oftc_must_be_destroyed".
23109 - Update to the January 2 2013 Maxmind GeoLite Country database.
23111 o Minor features (testing):
23112 - Add benchmarks for DH (1024-bit multiplicative group) and ECDH
23113 (P-256) Diffie-Hellman handshakes to src/or/bench.
23114 - Add benchmark functions to test onion handshake performance.
23116 o Minor features (path bias detection):
23117 - Alter the Path Bias log messages to be more descriptive in terms
23118 of reporting timeouts and other statistics.
23119 - Create three levels of Path Bias log messages, as opposed to just
23120 two. These are configurable via consensus as well as via the torrc
23121 options PathBiasNoticeRate, PathBiasWarnRate, PathBiasExtremeRate.
23122 The default values are 0.70, 0.50, and 0.30 respectively.
23123 - Separate the log message levels from the decision to drop guards,
23124 which also is available via torrc option PathBiasDropGuards.
23125 PathBiasDropGuards still defaults to 0 (off).
23126 - Deprecate PathBiasDisableRate in favor of PathBiasDropGuards
23127 in combination with PathBiasExtremeRate.
23128 - Increase the default values for PathBiasScaleThreshold and
23129 PathBiasCircThreshold from (200, 20) to (300, 150).
23130 - Add in circuit usage accounting to path bias. If we try to use a
23131 built circuit but fail for any reason, it counts as path bias.
23132 Certain classes of circuits where the adversary gets to pick your
23133 destination node are exempt from this accounting. Usage accounting
23134 can be specifically disabled via consensus parameter or torrc.
23135 - Convert all internal path bias state to double-precision floating
23136 point, to avoid roundoff error and other issues.
23137 - Only record path bias information for circuits that have completed
23138 *two* hops. Assuming end-to-end tagging is the attack vector, this
23139 makes us more resilient to ambient circuit failure without any
23140 detection capability loss.
23142 o Minor bugfixes (log messages):
23143 - Rate-limit the "No circuits are opened. Relaxed timeout for a
23144 circuit with channel state open..." message to once per hour to
23145 keep it from filling the notice logs. Mitigates bug 7799 but does
23146 not fix the underlying cause. Bugfix on 0.2.4.7-alpha.
23147 - Avoid spurious warnings when configuring multiple client ports of
23148 which only some are nonlocal. Previously, we had claimed that some
23149 were nonlocal when in fact they weren't. Fixes bug 7836; bugfix on
23152 o Code simplifications and refactoring:
23153 - Get rid of a couple of harmless clang warnings, where we compared
23154 enums to ints. These warnings are newly introduced in clang 3.2.
23155 - Split the onion.c file into separate modules for the onion queue
23156 and the different handshakes it supports.
23157 - Remove the marshalling/unmarshalling code for sending requests to
23158 cpuworkers over a socket, and instead just send structs. The
23159 recipient will always be the same Tor binary as the sender, so
23160 any encoding is overkill.
23163 Changes in version 0.2.4.7-alpha - 2012-12-24
23164 Tor 0.2.4.7-alpha introduces a new approach to providing fallback
23165 directory mirrors for more robust bootstrapping; fixes more issues where
23166 clients with changing network conditions refuse to make any circuits;
23167 adds initial support for exiting to IPv6 addresses; resumes being able
23168 to update our GeoIP database, and includes the geoip6 file this time;
23169 turns off the client-side DNS cache by default due to privacy risks;
23170 and fixes a variety of other issues.
23172 o Major features (client resilience):
23173 - Add a new "FallbackDir" torrc option to use when we can't use
23174 a directory mirror from the consensus (either because we lack a
23175 consensus, or because they're all down). Currently, all authorities
23176 are fallbacks by default, and there are no other default fallbacks,
23177 but that will change. This option will allow us to give clients a
23178 longer list of servers to try to get a consensus from when first
23179 connecting to the Tor network, and thereby reduce load on the
23180 directory authorities. Implements proposal 206, "Preconfigured
23181 directory sources for bootstrapping". We also removed the old
23182 "FallbackNetworkstatus" option, since we never got it working well
23183 enough to use it. Closes bug 572.
23184 - If we have no circuits open, use a relaxed timeout (the
23185 95-percentile cutoff) until a circuit succeeds. This heuristic
23186 should allow Tor to succeed at building circuits even when the
23187 network connection drastically changes. Should help with bug 3443.
23189 o Major features (IPv6):
23190 - Relays can now exit to IPv6 addresses: make sure that you have IPv6
23191 connectivity, then set the IPv6Exit flag to 1. Also make sure your
23192 exit policy reads as you would like: the address * applies to all
23193 address families, whereas *4 is IPv4 address only, and *6 is IPv6
23194 addresses only. On the client side, you'll need to wait until the
23195 authorities have upgraded, wait for enough exits to support IPv6,
23196 apply the "IPv6Traffic" flag to a SocksPort, and use Socks5. Closes
23197 ticket 5547, implements proposal 117 as revised in proposal 208.
23199 We DO NOT recommend that clients with actual anonymity needs start
23200 using IPv6 over Tor yet, since not enough exits support it yet.
23202 o Major features (geoip database):
23203 - Maxmind began labelling Tor relays as being in country "A1",
23204 which breaks by-country node selection inside Tor. Now we use a
23205 script to replace "A1" ("Anonymous Proxy") entries in our geoip
23206 file with real country codes. This script fixes about 90% of "A1"
23207 entries automatically and uses manual country code assignments to
23208 fix the remaining 10%. See src/config/README.geoip for details.
23209 Fixes bug 6266. Also update to the December 5 2012 Maxmind GeoLite
23210 Country database, as modified above.
23212 o Major bugfixes (client-side DNS):
23213 - Turn off the client-side DNS cache by default. Updating and using
23214 the DNS cache is now configurable on a per-client-port
23215 level. SOCKSPort, DNSPort, etc lines may now contain
23216 {No,}Cache{IPv4,IPv6,}DNS lines to indicate that we shouldn't
23217 cache these types of DNS answers when we receive them from an
23218 exit node in response to an application request on this port, and
23219 {No,}UseCached{IPv4,IPv6,DNS} lines to indicate that if we have
23220 cached DNS answers of these types, we shouldn't use them. It's
23221 potentially risky to use cached DNS answers at the client, since
23222 doing so can indicate to one exit what answers we've gotten
23223 for DNS lookups in the past. With IPv6, this becomes especially
23224 problematic. Using cached DNS answers for requests on the same
23225 circuit would present less linkability risk, since all traffic
23226 on a circuit is already linkable, but it would also provide
23227 little performance benefit: the exit node caches DNS replies
23228 too. Implements a simplified version of Proposal 205. Implements
23231 o Major bugfixes (other):
23232 - Alter circuit build timeout measurement to start at the point
23233 where we begin the CREATE/CREATE_FAST step (as opposed to circuit
23234 initialization). This should make our timeout measurements more
23235 uniform. Previously, we were sometimes including ORconn setup time
23236 in our circuit build time measurements. Should resolve bug 3443.
23237 - Fix an assertion that could trigger in hibernate_go_dormant() when
23238 closing an or_connection_t: call channel_mark_for_close() rather
23239 than connection_mark_for_close(). Fixes bug 7267. Bugfix on
23241 - Include the geoip6 IPv6 GeoIP database in the tarball. Fixes bug
23242 7655; bugfix on 0.2.4.6-alpha.
23245 - Add a new torrc option "ServerTransportListenAddr" to let bridge
23246 operators select the address where their pluggable transports will
23247 listen for connections. Resolves ticket 7013.
23248 - Allow an optional $ before the node identity digest in the
23249 controller command GETINFO ns/id/<identity>, for consistency with
23250 md/id/<identity> and desc/id/<identity>. Resolves ticket 7059.
23251 - Log packaged cell fullness as part of the heartbeat message.
23252 Diagnosis to try to determine the extent of bug 7743.
23254 o Minor features (IPv6):
23255 - AutomapHostsOnResolve now supports IPv6 addresses. By default, we
23256 prefer to hand out virtual IPv6 addresses, since there are more of
23257 them and we can't run out. To override this behavior and make IPv4
23258 addresses preferred, set NoPreferIPv6Automap on whatever SOCKSPort
23259 or DNSPort you're using for resolving. Implements ticket 7571.
23260 - AutomapHostsOnResolve responses are now randomized, to avoid
23261 annoying situations where Tor is restarted and applications
23262 connect to the wrong addresses.
23263 - Never try more than 1000 times to pick a new virtual address when
23264 AutomapHostsOnResolve is set. That's good enough so long as we
23265 aren't close to handing out our entire virtual address space;
23266 if you're getting there, it's best to switch to IPv6 virtual
23270 - The ADDRMAP command can no longer generate an ill-formed error
23271 code on a failed MAPADDRESS. It now says "internal" rather than
23272 an English sentence fragment with spaces in the middle. Bugfix on
23273 Tor 0.2.0.19-alpha.
23274 - Fix log messages and comments to avoid saying "GMT" when we mean
23275 "UTC". Fixes bug 6113.
23276 - Compile on win64 using mingw64. Fixes bug 7260; patches from
23278 - Fix a crash when debugging unit tests on Windows: deallocate a
23279 shared library with FreeLibrary, not CloseHandle. Fixes bug 7306;
23280 bugfix on 0.2.2.17-alpha. Reported by "ultramage".
23283 - The DirServer option is now DirAuthority, for consistency with
23284 current naming patterns. You can still use the old DirServer form.
23286 o Code simplification and refactoring:
23287 - Move the client-side address-map/virtual-address/DNS-cache code
23288 out of connection_edge.c into a new addressmap.c module.
23289 - Remove unused code for parsing v1 directories and "running routers"
23290 documents. Fixes bug 6887.
23293 Changes in version 0.2.3.25 - 2012-11-19
23294 The Tor 0.2.3 release series is dedicated to the memory of Len "rabbi"
23295 Sassaman (1980-2011), a long-time cypherpunk, anonymity researcher,
23296 Mixmaster maintainer, Pynchon Gate co-designer, CodeCon organizer,
23297 programmer, and friend. Unstinting in his dedication to the cause of
23298 freedom, he inspired and helped many of us as we began our work on
23299 anonymity, and inspires us still. Please honor his memory by writing
23300 software to protect people's freedoms, and by helping others to do so.
23302 Tor 0.2.3.25, the first stable release in the 0.2.3 branch, features
23303 significantly reduced directory overhead (via microdescriptors),
23304 enormous crypto performance improvements for fast relays on new
23305 enough hardware, a new v3 TLS handshake protocol that can better
23306 resist fingerprinting, support for protocol obfuscation plugins (aka
23307 pluggable transports), better scalability for hidden services, IPv6
23308 support for bridges, performance improvements like allowing clients
23309 to skip the first round-trip on the circuit ("optimistic data") and
23310 refilling token buckets more often, a new "stream isolation" design
23311 to isolate different applications on different circuits, and many
23312 stability, security, and privacy fixes.
23315 - Tor tries to wipe potentially sensitive data after using it, so
23316 that if some subsequent security failure exposes Tor's memory,
23317 the damage will be limited. But we had a bug where the compiler
23318 was eliminating these wipe operations when it decided that the
23319 memory was no longer visible to a (correctly running) program,
23320 hence defeating our attempt at defense in depth. We fix that
23321 by using OpenSSL's OPENSSL_cleanse() operation, which a compiler
23322 is unlikely to optimize away. Future versions of Tor may use
23323 a less ridiculously heavy approach for this. Fixes bug 7352.
23324 Reported in an article by Andrey Karpov.
23327 - Fix a harmless bug when opting against publishing a relay descriptor
23328 because DisableNetwork is set. Fixes bug 7464; bugfix on
23332 Changes in version 0.2.4.6-alpha - 2012-11-13
23333 Tor 0.2.4.6-alpha fixes an assert bug that has been plaguing relays,
23334 makes our defense-in-depth memory wiping more reliable, and begins to
23335 count IPv6 addresses in bridge statistics,
23338 - Fix an assertion failure that could occur when closing a connection
23339 with a spliced rendezvous circuit. Fix for bug 7212; bugfix on
23341 - Tor tries to wipe potentially sensitive data after using it, so
23342 that if some subsequent security failure exposes Tor's memory,
23343 the damage will be limited. But we had a bug where the compiler
23344 was eliminating these wipe operations when it decided that the
23345 memory was no longer visible to a (correctly running) program,
23346 hence defeating our attempt at defense in depth. We fix that
23347 by using OpenSSL's OPENSSL_cleanse() operation, which a compiler
23348 is unlikely to optimize away. Future versions of Tor may use
23349 a less ridiculously heavy approach for this. Fixes bug 7352.
23350 Reported in an article by Andrey Karpov.
23353 - Add GeoIP database for IPv6 addresses. The new config option
23355 - Bridge statistics now count bridge clients connecting over IPv6:
23356 bridge statistics files now list "bridge-ip-versions" and
23357 extra-info documents list "geoip6-db-digest". The control protocol
23358 "CLIENTS_SEEN" and "ip-to-country" queries now support IPv6. Initial
23359 implementation by "shkoo", addressing ticket 5055.
23362 - Warn when we are binding low ports when hibernation is enabled;
23363 previously we had warned when we were _advertising_ low ports with
23364 hibernation enabled. Fixes bug 7285; bugfix on 0.2.3.9-alpha.
23365 - Fix a harmless bug when opting against publishing a relay descriptor
23366 because DisableNetwork is set. Fixes bug 7464; bugfix on
23368 - Add warning message when a managed proxy dies during configuration.
23369 Fixes bug 7195; bugfix on 0.2.4.2-alpha.
23370 - Fix a linking error when building tor-fw-helper without miniupnp.
23371 Fixes bug 7235; bugfix on 0.2.4.2-alpha. Fix by Anthony G. Basile.
23372 - Check for closing an or_connection_t without going through correct
23373 channel functions; emit a warning and then call
23374 connection_or_close_for_error() so we don't assert as in bugs 7212
23376 - Compile correctly on compilers without C99 designated initializer
23377 support. Fixes bug 7286; bugfix on 0.2.4.4-alpha.
23378 - Avoid a possible assert that can occur when channel_send_destroy() is
23379 called on a channel in CHANNEL_STATE_CLOSING, CHANNEL_STATE_CLOSED,
23380 or CHANNEL_STATE_ERROR when the Tor process is resumed after being
23381 blocked for a long interval. Fixes bug 7350; bugfix on 0.2.4.4-alpha.
23382 - Fix a memory leak on failing cases of channel_tls_process_certs_cell.
23383 Fixes bug 7422; bugfix on 0.2.4.4-alpha.
23385 o Code simplification and refactoring:
23386 - Start using OpenBSD's implementation of queue.h, so that we don't
23387 need to hand-roll our own pointer and list structures whenever we
23388 need them. (We can't rely on a sys/queue.h, since some operating
23389 systems don't have them, and the ones that do have them don't all
23390 present the same extensions.)
23393 Changes in version 0.2.4.5-alpha - 2012-10-25
23394 Tor 0.2.4.5-alpha comes hard at the heels of 0.2.4.4-alpha, to fix
23395 two important security vulnerabilities that could lead to remotely
23396 triggerable relay crashes, fix a major bug that was preventing clients
23397 from choosing suitable exit nodes, and refactor some of our code.
23399 o Major bugfixes (security, also in 0.2.3.24-rc):
23400 - Fix a group of remotely triggerable assertion failures related to
23401 incorrect link protocol negotiation. Found, diagnosed, and fixed
23402 by "some guy from France". Fix for CVE-2012-2250; bugfix on
23404 - Fix a denial of service attack by which any directory authority
23405 could crash all the others, or by which a single v2 directory
23406 authority could crash everybody downloading v2 directory
23407 information. Fixes bug 7191; bugfix on 0.2.0.10-alpha.
23409 o Major bugfixes (also in 0.2.3.24-rc):
23410 - When parsing exit policy summaries from microdescriptors, we had
23411 previously been ignoring the last character in each one, so that
23412 "accept 80,443,8080" would be treated by clients as indicating
23413 a node that allows access to ports 80, 443, and 808. That would
23414 lead to clients attempting connections that could never work,
23415 and ignoring exit nodes that would support their connections. Now
23416 clients parse these exit policy summaries correctly. Fixes bug 7192;
23417 bugfix on 0.2.3.1-alpha.
23419 o Minor bugfixes (also in 0.2.3.24-rc):
23420 - Clients now consider the ClientRejectInternalAddresses config option
23421 when using a microdescriptor consensus stanza to decide whether
23422 an exit relay would allow exiting to an internal address. Fixes
23423 bug 7190; bugfix on 0.2.3.1-alpha.
23426 - Only disable TLS session ticket support when running as a TLS
23427 server. Now clients will blend better with regular Firefox
23428 connections. Fixes bug 7189; bugfix on Tor 0.2.3.23-rc.
23430 o Code simplification and refactoring:
23431 - Start using OpenBSD's implementation of queue.h (originally by
23433 - Move the entry node code from circuitbuild.c to its own file.
23434 - Move the circuit build timeout tracking code from circuitbuild.c
23438 Changes in version 0.2.3.24-rc - 2012-10-25
23439 Tor 0.2.3.24-rc fixes two important security vulnerabilities that
23440 could lead to remotely triggerable relay crashes, and fixes
23441 a major bug that was preventing clients from choosing suitable exit
23444 o Major bugfixes (security):
23445 - Fix a group of remotely triggerable assertion failures related to
23446 incorrect link protocol negotiation. Found, diagnosed, and fixed
23447 by "some guy from France". Fix for CVE-2012-2250; bugfix on
23449 - Fix a denial of service attack by which any directory authority
23450 could crash all the others, or by which a single v2 directory
23451 authority could crash everybody downloading v2 directory
23452 information. Fixes bug 7191; bugfix on 0.2.0.10-alpha.
23455 - When parsing exit policy summaries from microdescriptors, we had
23456 previously been ignoring the last character in each one, so that
23457 "accept 80,443,8080" would be treated by clients as indicating
23458 a node that allows access to ports 80, 443, and 808. That would
23459 lead to clients attempting connections that could never work,
23460 and ignoring exit nodes that would support their connections. Now
23461 clients parse these exit policy summaries correctly. Fixes bug 7192;
23462 bugfix on 0.2.3.1-alpha.
23465 - Clients now consider the ClientRejectInternalAddresses config option
23466 when using a microdescriptor consensus stanza to decide whether
23467 an exit relay would allow exiting to an internal address. Fixes
23468 bug 7190; bugfix on 0.2.3.1-alpha.
23471 Changes in version 0.2.4.4-alpha - 2012-10-20
23472 Tor 0.2.4.4-alpha adds a new v3 directory authority, fixes a privacy
23473 vulnerability introduced by a change in OpenSSL, fixes a remotely
23474 triggerable assert, and adds new channel_t and circuitmux_t abstractions
23475 that will make it easier to test new connection transport and cell
23476 scheduling algorithms.
23478 o New directory authorities (also in 0.2.3.23-rc):
23479 - Add Faravahar (run by Sina Rabbani) as the ninth v3 directory
23480 authority. Closes ticket 5749.
23482 o Major bugfixes (security/privacy, also in 0.2.3.23-rc):
23483 - Disable TLS session tickets. OpenSSL's implementation was giving
23484 our TLS session keys the lifetime of our TLS context objects, when
23485 perfect forward secrecy would want us to discard anything that
23486 could decrypt a link connection as soon as the link connection
23487 was closed. Fixes bug 7139; bugfix on all versions of Tor linked
23488 against OpenSSL 1.0.0 or later. Found by Florent Daignière.
23489 - Discard extraneous renegotiation attempts once the V3 link
23490 protocol has been initiated. Failure to do so left us open to
23491 a remotely triggerable assertion failure. Fixes CVE-2012-2249;
23492 bugfix on 0.2.3.6-alpha. Reported by "some guy from France".
23494 o Internal abstraction features:
23495 - Introduce new channel_t abstraction between circuits and
23496 or_connection_t to allow for implementing alternate OR-to-OR
23497 transports. A channel_t is an abstract object which can either be a
23498 cell-bearing channel, which is responsible for authenticating and
23499 handshaking with the remote OR and transmitting cells to and from
23500 it, or a listening channel, which spawns new cell-bearing channels
23501 at the request of remote ORs. Implements part of ticket 6465.
23502 - Also new is the channel_tls_t subclass of channel_t, adapting it
23503 to the existing or_connection_t code. The V2/V3 protocol handshaking
23504 code which formerly resided in command.c has been moved below the
23505 channel_t abstraction layer and may be found in channeltls.c now.
23506 Implements the rest of ticket 6465.
23507 - Introduce new circuitmux_t storing the queue of circuits for
23508 a channel; this encapsulates and abstracts the queue logic and
23509 circuit selection policy, and allows the latter to be overridden
23510 easily by switching out a policy object. The existing EWMA behavior
23511 is now implemented as a circuitmux_policy_t. Resolves ticket 6816.
23513 o Required libraries:
23514 - Tor now requires OpenSSL 0.9.8 or later. OpenSSL 1.0.0 or later is
23515 strongly recommended.
23518 - Warn users who run hidden services on a Tor client with
23519 UseEntryGuards disabled that their hidden services will be
23520 vulnerable to http://freehaven.net/anonbib/#hs-attack06 (the
23521 attack which motivated Tor to support entry guards in the first
23522 place). Resolves ticket 6889.
23523 - Tor now builds correctly on Bitrig, an OpenBSD fork. Patch from
23524 dhill. Resolves ticket 6982.
23525 - Option OutboundBindAddress can be specified multiple times and
23526 accepts IPv6 addresses. Resolves ticket 6876.
23528 o Minor bugfixes (also in 0.2.3.23-rc):
23529 - Don't serve or accept v2 hidden service descriptors over a
23530 relay's DirPort. It's never correct to do so, and disabling it
23531 might make it more annoying to exploit any bugs that turn up in the
23532 descriptor-parsing code. Fixes bug 7149.
23533 - Fix two cases in src/or/transports.c where we were calling
23534 fmt_addr() twice in a parameter list. Bug found by David
23535 Fifield. Fixes bug 7014; bugfix on 0.2.3.9-alpha.
23536 - Fix memory leaks whenever we logged any message about the "path
23537 bias" detection. Fixes bug 7022; bugfix on 0.2.3.21-rc.
23538 - When relays refuse a "create" cell because their queue of pending
23539 create cells is too big (typically because their cpu can't keep up
23540 with the arrival rate), send back reason "resource limit" rather
23541 than reason "internal", so network measurement scripts can get a
23542 more accurate picture. Fixes bug 7037; bugfix on 0.1.1.11-alpha.
23545 - Command-line option "--version" implies "--quiet". Fixes bug 6997.
23546 - Free some more still-in-use memory at exit, to make hunting for
23547 memory leaks easier. Resolves bug 7029.
23548 - When a Tor client gets a "truncated" relay cell, the first byte of
23549 its payload specifies why the circuit was truncated. We were
23550 ignoring this 'reason' byte when tearing down the circuit, resulting
23551 in the controller not being told why the circuit closed. Now we
23552 pass the reason from the truncated cell to the controller. Bugfix
23553 on 0.1.2.3-alpha; fixes bug 7039.
23554 - Downgrade "Failed to hand off onionskin" messages to "debug"
23555 severity, since they're typically redundant with the "Your computer
23556 is too slow" messages. Fixes bug 7038; bugfix on 0.2.2.16-alpha.
23557 - Make clients running with IPv6 bridges connect over IPv6 again,
23558 even without setting new config options ClientUseIPv6 and
23559 ClientPreferIPv6ORPort. Fixes bug 6757; bugfix on 0.2.4.1-alpha.
23560 - Use square brackets around IPv6 addresses in numerous places
23561 that needed them, including log messages, HTTPS CONNECT proxy
23562 requests, TransportProxy statefile entries, and pluggable transport
23563 extra-info lines. Fixes bug 7011; patch by David Fifield.
23565 o Code refactoring and cleanup:
23566 - Source files taken from other packages now reside in src/ext;
23567 previously they were scattered around the rest of Tor.
23568 - Avoid use of reserved identifiers in our C code. The C standard
23569 doesn't like us declaring anything that starts with an
23570 underscore, so let's knock it off before we get in trouble. Fix
23571 for bug 1031; bugfix on the first Tor commit.
23574 Changes in version 0.2.3.23-rc - 2012-10-20
23575 Tor 0.2.3.23-rc adds a new v3 directory authority, fixes a privacy
23576 vulnerability introduced by a change in OpenSSL, and fixes a variety
23577 of smaller bugs in preparation for the release.
23579 o New directory authorities:
23580 - Add Faravahar (run by Sina Rabbani) as the ninth v3 directory
23581 authority. Closes ticket 5749.
23583 o Major bugfixes (security/privacy):
23584 - Disable TLS session tickets. OpenSSL's implementation was giving
23585 our TLS session keys the lifetime of our TLS context objects, when
23586 perfect forward secrecy would want us to discard anything that
23587 could decrypt a link connection as soon as the link connection
23588 was closed. Fixes bug 7139; bugfix on all versions of Tor linked
23589 against OpenSSL 1.0.0 or later. Found by Florent Daignière.
23590 - Discard extraneous renegotiation attempts once the V3 link
23591 protocol has been initiated. Failure to do so left us open to
23592 a remotely triggerable assertion failure. Fixes CVE-2012-2249;
23593 bugfix on 0.2.3.6-alpha. Reported by "some guy from France".
23596 - Fix a possible crash bug when checking for deactivated circuits
23597 in connection_or_flush_from_first_active_circuit(). Fixes bug 6341;
23598 bugfix on 0.2.2.7-alpha. Bug report and fix received pseudonymously.
23600 o Minor bugfixes (on 0.2.3.x):
23601 - Fix two cases in src/or/transports.c where we were calling
23602 fmt_addr() twice in a parameter list. Bug found by David
23603 Fifield. Fixes bug 7014; bugfix on 0.2.3.9-alpha.
23604 - Convert an assert in the pathbias code to a log message. The assert
23605 appears to only be triggerable by Tor2Web mode. Fixes bug 6866;
23606 bugfix on 0.2.3.17-beta.
23607 - Fix memory leaks whenever we logged any message about the "path
23608 bias" detection. Fixes bug 7022; bugfix on 0.2.3.21-rc.
23610 o Minor bugfixes (on 0.2.2.x and earlier):
23611 - Don't serve or accept v2 hidden service descriptors over a relay's
23612 DirPort. It's never correct to do so, and disabling it might
23613 make it more annoying to exploit any bugs that turn up in the
23614 descriptor-parsing code. Fixes bug 7149.
23615 - When relays refuse a "create" cell because their queue of pending
23616 create cells is too big (typically because their cpu can't keep up
23617 with the arrival rate), send back reason "resource limit" rather
23618 than reason "internal", so network measurement scripts can get a
23619 more accurate picture. Bugfix on 0.1.1.11-alpha; fixes bug 7037.
23620 - Correct file sizes when reading binary files on Cygwin, to avoid
23621 a bug where Tor would fail to read its state file. Fixes bug 6844;
23622 bugfix on 0.1.2.7-alpha.
23623 - Avoid undefined behavior when parsing the list of supported
23624 rendezvous/introduction protocols in a hidden service descriptor.
23625 Previously, Tor would have confused (as-yet-unused) protocol version
23626 numbers greater than 32 with lower ones on many platforms. Fixes
23627 bug 6827; bugfix on 0.2.0.10-alpha. Found by George Kadianakis.
23629 o Documentation fixes:
23630 - Clarify that hidden services are TCP only. Fixes bug 6024.
23633 Changes in version 0.2.4.3-alpha - 2012-09-22
23634 Tor 0.2.4.3-alpha fixes another opportunity for a remotely triggerable
23635 assertion, resumes letting relays test reachability of their DirPort,
23636 and cleans up a bunch of smaller bugs.
23639 - Fix an assertion failure in tor_timegm() that could be triggered
23640 by a badly formatted directory object. Bug found by fuzzing with
23641 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
23644 - Fix a possible crash bug when checking for deactivated circuits
23645 in connection_or_flush_from_first_active_circuit(). Fixes bug 6341;
23646 bugfix on 0.2.2.7-alpha. Bug report and fix received pseudonymously.
23647 - Allow routers to detect that their own DirPorts are running. When
23648 we removed support for versions_supports_begindir, we also
23649 accidentally removed the mechanism we used to self-test our
23650 DirPort. Diagnosed with help from kargig. Fixes bugs 6814 and 6815;
23651 bugfix on 0.2.4.2-alpha.
23653 o Security features:
23654 - Switch to a completely time-invariant approach for picking nodes
23655 weighted by bandwidth. Our old approach would run through the
23656 part of the loop after it had made its choice slightly slower
23657 than it ran through the part of the loop before it had made its
23658 choice. Addresses ticket 6538.
23659 - Disable the use of Guard nodes when in Tor2WebMode. Guard usage
23660 by tor2web clients allows hidden services to identify tor2web
23661 clients through their repeated selection of the same rendezvous
23662 and introduction point circuit endpoints (their guards). Resolves
23666 - Enable Tor to read configuration, state, and key information from
23667 a FIFO. Previously Tor would only read from files with a positive
23668 stat.st_size. Code from meejah; fixes bug 6044.
23671 - Correct file sizes when reading binary files on Cygwin, to avoid
23672 a bug where Tor would fail to read its state file. Fixes bug 6844;
23673 bugfix on 0.1.2.7-alpha.
23674 - Correctly handle votes with more than 31 flags. Fixes bug 6853;
23675 bugfix on 0.2.0.3-alpha.
23676 - When complaining about a client port on a public address, log
23677 which address we're complaining about. Fixes bug 4020; bugfix on
23678 0.2.3.3-alpha. Patch by Tom Fitzhenry.
23679 - Convert an assert in the pathbias code to a log message. The assert
23680 appears to only be triggerable by Tor2Web mode. Fixes bug 6866;
23681 bugfix on 0.2.3.17-beta.
23682 - Our new buildsystem was overzealous about rebuilding manpages: it
23683 would rebuild them all whenever any one of them changed. Now our
23684 dependency checking should be correct. Fixes bug 6843; bugfix on
23686 - Don't do reachability testing over IPv6 unless AuthDirPublishIPv6
23687 is set. Fixes bug 6880. Bugfix on 0.2.4.1-alpha.
23688 - Correct log printout about which address family is preferred
23689 when connecting to a bridge with both an IPv4 and IPv6 OR port.
23690 Fixes bug 6884; bugfix on 0.2.4.1-alpha.
23692 o Minor bugfixes (code cleanliness):
23693 - Fix round_to_power_of_2() so it doesn't invoke undefined behavior
23694 with large values. This situation was untriggered, but nevertheless
23695 incorrect. Fixes bug 6831; bugfix on 0.2.0.1-alpha.
23696 - Reject consensus votes with more than 64 known-flags. We aren't even
23697 close to that limit yet, and our code doesn't handle it correctly.
23698 Fixes bug 6833; bugfix on 0.2.0.1-alpha.
23699 - Avoid undefined behavior when parsing the list of supported
23700 rendezvous/introduction protocols in a hidden service descriptor.
23701 Previously, Tor would have confused (as-yet-unused) protocol version
23702 numbers greater than 32 with lower ones on many platforms. Fixes
23703 bug 6827; bugfix on 0.2.0.10-alpha. Found by George Kadianakis.
23704 - Fix handling of rendezvous client authorization types over 8.
23705 Fixes bug 6861; bugfix on 0.2.1.5-alpha.
23706 - Fix building with older versions of GCC (2.95, for one) that don't
23707 like preprocessor directives inside macro arguments. Found by
23708 grarpamp. Fixes bug 6842; bugfix on 0.2.4.2-alpha.
23709 - Switch weighted node selection rule from using a list of doubles
23710 to using a list of int64_t. This change should make the process
23711 slightly easier to debug and maintain. Needed to finish ticket 6538.
23713 o Code simplification and refactoring:
23714 - Move the generic "config" code into a new file, and have "config.c"
23715 hold only torrc- and state-related code. Resolves ticket 6823.
23716 - Move the core of our "choose a weighted element at random" logic
23717 into its own function, and give it unit tests. Now the logic is
23718 testable, and a little less fragile too.
23719 - Removed the testing_since field of node_t, which hasn't been used
23720 for anything since 0.2.0.9-alpha.
23722 o Documentation fixes:
23723 - Clarify that hidden services are TCP only. Fixes bug 6024.
23724 - Resolve a typo in torrc.sample.in. Fixes bug 6819; bugfix on
23728 Changes in version 0.2.3.22-rc - 2012-09-11
23729 Tor 0.2.3.22-rc fixes another opportunity for a remotely triggerable
23733 - Fix an assertion failure in tor_timegm() that could be triggered
23734 by a badly formatted directory object. Bug found by fuzzing with
23735 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
23738 - Avoid segfault when starting up having run with an extremely old
23739 version of Tor and parsing its state file. Fixes bug 6801; bugfix
23743 Changes in version 0.2.2.39 - 2012-09-11
23744 Tor 0.2.2.39 fixes two more opportunities for remotely triggerable
23748 - Fix an assertion failure in tor_timegm() that could be triggered
23749 by a badly formatted directory object. Bug found by fuzzing with
23750 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
23751 - Do not crash when comparing an address with port value 0 to an
23752 address policy. This bug could have been used to cause a remote
23753 assertion failure by or against directory authorities, or to
23754 allow some applications to crash clients. Fixes bug 6690; bugfix
23758 Changes in version 0.2.4.2-alpha - 2012-09-10
23759 Tor 0.2.4.2-alpha enables port forwarding for pluggable transports,
23760 raises the default rate limiting even more, and makes the bootstrapping
23761 log messages less noisy.
23764 - Automatically forward the TCP ports of pluggable transport
23765 proxies using tor-fw-helper if PortForwarding is enabled. Implements
23769 - Raise the default BandwidthRate/BandwidthBurst values from 5MB/10MB
23770 to 1GB/1GB. The previous defaults were intended to be "basically
23771 infinite", but it turns out they're now limiting our 100mbit+
23772 relays and bridges. Fixes bug 6605; bugfix on 0.2.0.10-alpha (the
23773 last time we raised it).
23776 - Detect when we're running with a version of OpenSSL other than the
23777 one we compiled with. This has occasionally given people hard-to-
23779 - Log fewer lines at level "notice" about our OpenSSL and Libevent
23780 versions and capabilities when everything is going right. Resolves
23781 part of ticket 6736.
23782 - Directory authorities no long accept descriptors for any version of
23783 Tor before 0.2.2.35, or for any 0.2.3 release before 0.2.3.10-alpha.
23784 These versions are insecure, unsupported, or both. Implements
23788 - Rename the (internal-use-only) UsingTestingNetworkDefaults option
23789 to start with a triple-underscore so the controller won't touch it.
23790 Patch by Meejah. Fixes bug 3155. Bugfix on 0.2.2.23-alpha.
23791 - Avoid segfault when starting up having run with an extremely old
23792 version of Tor and parsing its state file. Fixes bug 6801; bugfix
23794 - Rename the (testing-use-only) _UseFilteringSSLBufferevents option
23795 so it doesn't start with _. Fixes bug 3155. Bugfix on 0.2.3.1-alpha.
23796 - Don't follow the NULL pointer if microdescriptor generation fails.
23797 (This does not appear to be triggerable, but it's best to be safe.)
23798 Found by "f. tp.". Fixes bug 6797; bugfix on 0.2.4.1-alpha.
23799 - Fix mis-declared dependencies on src/common/crypto.c and
23800 src/or/tor_main.c that could break out-of-tree builds under some
23801 circumstances. Fixes bug 6778; bugfix on 0.2.4.1-alpha.
23802 - Avoid a warning when building common_sha1.i out of tree. Fixes bug
23803 6778; bugfix on 0.2.4.1-alpha.
23804 - Fix a harmless (in this case) build warning for implicitly
23805 converting a strlen() to an int. Bugfix on 0.2.4.1-alpha.
23807 o Removed features:
23808 - Now that all versions before 0.2.2.x are disallowed, we no longer
23809 need to work around their missing features. Thus we can remove a
23810 bunch of compatibility code.
23812 o Code refactoring:
23813 - Tweak tor-fw-helper to accept an arbitrary amount of arbitrary
23814 TCP ports to forward. In the past it only accepted two ports:
23815 the ORPort and the DirPort.
23818 Changes in version 0.2.4.1-alpha - 2012-09-05
23819 Tor 0.2.4.1-alpha lets bridges publish their pluggable transports to
23820 bridgedb; lets relays use IPv6 addresses and directory authorities
23821 advertise them; and switches to a cleaner build interface.
23823 This is the first alpha release in a new series, so expect there to
23824 be bugs. Users who would rather test out a more stable branch should
23825 stay with 0.2.3.x for now.
23827 o Major features (bridges):
23828 - Bridges now report the pluggable transports they support to the
23829 bridge authority, so it can pass the supported transports on to
23830 bridgedb and/or eventually do reachability testing. Implements
23833 o Major features (IPv6):
23834 - Bridge authorities now accept IPv6 bridge addresses and include
23835 them in network status documents. Implements ticket 5534.
23836 - Clients who set "ClientUseIPv6 1" may connect to entry nodes over
23837 IPv6. Set "ClientPreferIPv6ORPort 1" to make this even more likely
23838 to happen. Implements ticket 5535.
23839 - All kind of relays, not just bridges, can now advertise an IPv6
23840 OR port. Implements ticket 6362.
23841 - Directory authorities vote on IPv6 OR ports using the new consensus
23842 method 14. Implements ticket 6363.
23844 o Major features (build):
23845 - Switch to a nonrecursive Makefile structure. Now instead of each
23846 Makefile.am invoking other Makefile.am's, there is a master
23847 Makefile.am that includes the others. This change makes our build
23848 process slightly more maintainable, and improves parallelism for
23849 building with make -j. Original patch by Stewart Smith; various
23850 fixes by Jim Meyering.
23851 - Where available, we now use automake's "silent" make rules by
23852 default, so that warnings are easier to spot. You can get the old
23853 behavior with "make V=1". Patch by Stewart Smith for ticket 6522.
23855 o Minor features (code security and spec conformance):
23856 - Clear keys and key-derived material left on the stack in
23857 rendservice.c and rendclient.c. Check return value of
23858 crypto_pk_write_private_key_to_string() in rend_service_load_keys().
23859 These fixes should make us more forward-secure against cold-boot
23860 attacks and the like. Fixes bug 2385.
23861 - Reject EXTEND cells sent to nonexistent streams. According to the
23862 spec, an EXTEND cell sent to _any_ nonzero stream ID is invalid, but
23863 we were only checking for stream IDs that were currently in use.
23864 Found while hunting for more instances of bug 6271. Bugfix on
23865 0.0.2pre8, which introduced incremental circuit construction.
23867 o Minor features (streamlining);
23868 - No longer include the "opt" prefix when generating routerinfos
23869 or v2 directories: it has been needless since Tor 0.1.2. Closes
23871 - Remove some now-needless code that tried to aggressively flush
23872 OR connections as data was added to them. Since 0.2.0.1-alpha, our
23873 cell queue logic has saved us from the failure mode that this code
23874 was supposed to prevent. Removing this code will limit the number
23875 of baroque control flow paths through Tor's network logic. Reported
23876 pseudonymously on IRC. Fixes bug 6468; bugfix on 0.2.0.1-alpha.
23878 o Minor features (controller):
23879 - Add a "GETINFO signal/names" control port command. Implements
23881 - Provide default values for all options via "GETINFO config/defaults".
23882 Implements ticket 4971.
23884 o Minor features (IPv6):
23885 - New config option "AuthDirHasIPv6Connectivity 1" that directory
23886 authorities should set if they have IPv6 connectivity and want to
23887 do reachability tests for IPv6 relays. Implements feature 5974.
23888 - A relay with an IPv6 OR port now sends that address in NETINFO
23889 cells (in addition to its other address). Implements ticket 6364.
23891 o Minor features (log messages):
23892 - Omit the first heartbeat log message, because it never has anything
23893 useful to say, and it clutters up the bootstrapping messages.
23894 Resolves ticket 6758.
23895 - Don't log about reloading the microdescriptor cache at startup. Our
23896 bootstrap warnings are supposed to tell the user when there's a
23897 problem, and our bootstrap notices say when there isn't. Resolves
23898 ticket 6759; bugfix on 0.2.2.6-alpha.
23899 - Don't log "I learned some more directory information" when we're
23900 reading cached directory information. Reserve it for when new
23901 directory information arrives in response to a fetch. Resolves
23903 - Prevent rounding error in path bias counts when scaling
23904 them down, and use the correct scale factor default. Also demote
23905 some path bias related log messages down a level and make others
23906 less scary sounding. Fixes bug 6647. Bugfix against 0.2.3.17-beta.
23907 - We no longer warn so much when generating manpages from their
23910 o Code simplifications and refactoring:
23911 - Enhance our internal sscanf replacement so that we can eliminate
23912 the last remaining uses of the system sscanf. (Though those uses
23913 of sscanf were safe, sscanf itself is generally error prone, so
23914 we want to eliminate when we can.) Fixes ticket 4195 and Coverity
23916 - Move ipv6_preferred from routerinfo_t to node_t. Addresses bug 4620.
23917 - Move last_reachable and testing_since from routerinfo_t to node_t.
23918 Implements ticket 5529.
23919 - Add replaycache_t structure, functions and unit tests, then refactor
23920 rend_service_introduce() to be more clear to read, improve, debug,
23921 and test. Resolves bug 6177.
23922 - Finally remove support for malloc_good_size and malloc_usable_size.
23923 We had hoped that these functions would let us eke a little more
23924 memory out of our malloc implementation. Unfortunately, the only
23925 implementations that provided these functions are also ones that
23926 are already efficient about not overallocation: they never got us
23927 more than 7 or so bytes per allocation. Removing them saves us a
23928 little code complexity and a nontrivial amount of build complexity.
23930 o New requirements:
23931 - Tor maintainers now require Automake version 1.9 or later to build
23932 Tor from the Git repository. (Automake is not required when building
23933 from a source distribution.)
23936 Changes in version 0.2.3.21-rc - 2012-09-05
23937 Tor 0.2.3.21-rc is the fourth release candidate for the Tor 0.2.3.x
23938 series. It fixes a trio of potential security bugs, fixes a bug where
23939 we were leaving some of the fast relays out of the microdescriptor
23940 consensus, resumes interpreting "ORPort 0" and "DirPort 0" correctly,
23941 and cleans up other smaller issues.
23943 o Major bugfixes (security):
23944 - Tear down the circuit if we get an unexpected SENDME cell. Clients
23945 could use this trick to make their circuits receive cells faster
23946 than our flow control would have allowed, or to gum up the network,
23947 or possibly to do targeted memory denial-of-service attacks on
23948 entry nodes. Fixes bug 6252. Bugfix on the 54th commit on Tor --
23949 from July 2002, before the release of Tor 0.0.0. We had committed
23950 this patch previously, but we had to revert it because of bug 6271.
23951 Now that 6271 is fixed, this patch appears to work.
23952 - Reject any attempt to extend to an internal address. Without
23953 this fix, a router could be used to probe addresses on an internal
23954 network to see whether they were accepting connections. Fixes bug
23955 6710; bugfix on 0.0.8pre1.
23956 - Do not crash when comparing an address with port value 0 to an
23957 address policy. This bug could have been used to cause a remote
23958 assertion failure by or against directory authorities, or to
23959 allow some applications to crash clients. Fixes bug 6690; bugfix
23963 - Remove the upper bound on microdescriptor length. We were hitting
23964 the limit for routers with complex exit policies or family
23965 declarations, causing clients to not use them. Fixes the first
23966 piece of bug 6404; fix on 0.2.2.6-alpha.
23967 - Detect "ORPort 0" as meaning, uniformly, that we're not running
23968 as a relay. Previously, some of our code would treat the presence
23969 of any ORPort line as meaning that we should act like a relay,
23970 even though our new listener code would correctly not open any
23971 ORPorts for ORPort 0. Similar bugs in other Port options are also
23972 fixed. Fixes the first half of bug 6507; bugfix on 0.2.3.3-alpha.
23975 - Avoid a pair of double-free and use-after-mark bugs that can
23976 occur with certain timings in canceled and re-received DNS
23977 requests. Fixes bug 6472; bugfix on 0.0.7rc1.
23978 - Fix build and 64-bit compile warnings from --enable-openbsd-malloc.
23979 Fixes bug 6379. Bugfix on 0.2.0.20-rc.
23980 - Allow one-hop directory fetching circuits the full "circuit build
23981 timeout" period, rather than just half of it, before failing them
23982 and marking the relay down. This fix should help reduce cases where
23983 clients declare relays (or worse, bridges) unreachable because
23984 the TLS handshake takes a few seconds to complete. Fixes bug 6743;
23985 bugfix on 0.2.2.2-alpha, where we changed the timeout from a static
23987 - Authorities no longer include any router in their microdescriptor
23988 consensuses for which they couldn't generate or agree on a
23989 microdescriptor. Fixes the second piece of bug 6404; fix on
23991 - Detect and reject attempts to specify both "FooPort" and
23992 "FooPort 0" in the same configuration domain. (It's still okay
23993 to have a FooPort in your configuration file, and use "FooPort 0"
23994 on the command line to disable it.) Fixes the second half of bug
23995 6507; bugfix on 0.2.3.3-alpha.
23996 - Make wildcarded addresses (that is, ones beginning with "*.") work
23997 when provided via the controller's MapAddress command. Previously,
23998 they were accepted, but we never actually noticed that they were
23999 wildcards. Fixes bug 6244; bugfix on 0.2.3.9-alpha.
24000 - Avoid crashing on a malformed state file where EntryGuardPathBias
24001 precedes EntryGuard. Fix for bug 6774; bugfix on 0.2.3.17-beta.
24002 - Add a (probably redundant) memory clear between iterations of
24003 the router status voting loop, to prevent future coding errors
24004 where data might leak between iterations of the loop. Resolves
24007 o Minor bugfixes (log messages):
24008 - Downgrade "set buildtimeout to low value" messages to "info"
24009 severity; they were never an actual problem, there was never
24010 anything reasonable to do about them, and they tended to spam logs
24011 from time to time. Fixes bug 6251; bugfix on 0.2.2.2-alpha.
24012 - Downgrade path-bias warning messages to "info". We'll try to get
24013 them working better in 0.2.4. Add internal circuit construction
24014 state to protect against the noisy warn message "Unexpectedly high
24015 circuit_successes". Also add some additional rate-limited notice
24016 messages to help determine the root cause of the warn. Fixes bug
24017 6475. Bugfix against 0.2.3.17-beta.
24018 - Move log message when unable to find a microdesc in a routerstatus
24019 entry to parse time. Previously we'd spam this warning every time
24020 we tried to figure out which microdescriptors to download. Fixes
24021 the third piece of bug 6404; fix on 0.2.3.18-rc.
24024 - Consider new, removed or changed IPv6 OR ports a non-cosmetic
24025 change when the authority is deciding whether to accept a newly
24026 uploaded descriptor. Implements ticket 6423.
24027 - Add missing documentation for consensus and microdesc files.
24028 Resolves ticket 6732.
24031 Changes in version 0.2.2.38 - 2012-08-12
24032 Tor 0.2.2.38 fixes a remotely triggerable crash bug, and fixes a timing
24033 attack that could in theory leak path information.
24036 - Avoid an uninitialized memory read when reading a vote or consensus
24037 document that has an unrecognized flavor name. This read could
24038 lead to a remote crash bug. Fixes bug 6530; bugfix on 0.2.2.6-alpha.
24039 - Try to leak less information about what relays a client is
24040 choosing to a side-channel attacker. Previously, a Tor client would
24041 stop iterating through the list of available relays as soon as it
24042 had chosen one, thus finishing a little earlier when it picked
24043 a router earlier in the list. If an attacker can recover this
24044 timing information (nontrivial but not proven to be impossible),
24045 they could learn some coarse-grained information about which relays
24046 a client was picking (middle nodes in particular are likelier to
24047 be affected than exits). The timing attack might be mitigated by
24048 other factors (see bug 6537 for some discussion), but it's best
24049 not to take chances. Fixes bug 6537; bugfix on 0.0.8rc1.
24052 Changes in version 0.2.3.20-rc - 2012-08-05
24053 Tor 0.2.3.20-rc is the third release candidate for the Tor 0.2.3.x
24054 series. It fixes a pair of code security bugs and a potential anonymity
24055 issue, updates our RPM spec files, and cleans up other smaller issues.
24058 - Avoid read-from-freed-memory and double-free bugs that could occur
24059 when a DNS request fails while launching it. Fixes bug 6480;
24060 bugfix on 0.2.0.1-alpha.
24061 - Avoid an uninitialized memory read when reading a vote or consensus
24062 document that has an unrecognized flavor name. This read could
24063 lead to a remote crash bug. Fixes bug 6530; bugfix on 0.2.2.6-alpha.
24064 - Try to leak less information about what relays a client is
24065 choosing to a side-channel attacker. Previously, a Tor client would
24066 stop iterating through the list of available relays as soon as it
24067 had chosen one, thus finishing a little earlier when it picked
24068 a router earlier in the list. If an attacker can recover this
24069 timing information (nontrivial but not proven to be impossible),
24070 they could learn some coarse-grained information about which relays
24071 a client was picking (middle nodes in particular are likelier to
24072 be affected than exits). The timing attack might be mitigated by
24073 other factors (see bug 6537 for some discussion), but it's best
24074 not to take chances. Fixes bug 6537; bugfix on 0.0.8rc1.
24077 - Try to make the warning when giving an obsolete SOCKSListenAddress
24078 a little more useful.
24079 - Terminate active server managed proxies if Tor stops being a
24080 relay. Addresses parts of bug 6274; bugfix on 0.2.3.6-alpha.
24081 - Provide a better error message about possible OSX Asciidoc failure
24082 reasons. Fixes bug 6436.
24083 - Warn when Tor is configured to use accounting in a way that can
24084 link a hidden service to some other hidden service or public
24085 address. Resolves ticket 6490.
24088 - Check return value of fputs() when writing authority certificate
24089 file. Fixes Coverity issue 709056; bugfix on 0.2.0.1-alpha.
24090 - Ignore ServerTransportPlugin lines when Tor is not configured as
24091 a relay. Fixes bug 6274; bugfix on 0.2.3.6-alpha.
24092 - When disabling guards for having too high a proportion of failed
24093 circuits, make sure to look at each guard. Fixes bug 6397; bugfix
24097 - Update our default RPM spec files to work with mock and rpmbuild
24098 on RHEL/Fedora. They have an updated set of dependencies and
24099 conflicts, a fix for an ancient typo when creating the "_tor"
24100 user, and better instructions. Thanks to Ondrej Mikle for the
24101 patch series. Fixes bug 6043.
24104 - Make it possible to set the TestingTorNetwork configuration
24105 option using AlternateDirAuthority and AlternateBridgeAuthority
24106 as an alternative to setting DirServer. Addresses ticket 6377.
24109 - Clarify the documentation for the Alternate*Authority options.
24111 - Fix some typos in the manpages. Patch from A. Costa. Fixes bug 6500.
24113 o Code simplification and refactoring:
24114 - Do not use SMARTLIST_FOREACH for any loop whose body exceeds
24115 10 lines. Also, don't nest them. Doing so in the past has
24116 led to hard-to-debug code. The new style is to use the
24117 SMARTLIST_FOREACH_{BEGIN,END} pair. Addresses issue 6400.
24120 Changes in version 0.2.3.19-rc - 2012-07-06
24121 Tor 0.2.3.19-rc is the second release candidate for the Tor 0.2.3.x
24122 series. It fixes the compile on Windows, reverts to a GeoIP database
24123 that isn't as broken, and fixes a flow control bug that has been around
24124 since the beginning of Tor.
24127 - Fix a bug handling SENDME cells on nonexistent streams that could
24128 result in bizarre window values. Report and patch contributed
24129 pseudonymously. Fixes part of bug 6271. This bug was introduced
24130 before the first Tor release, in svn commit r152.
24131 - Revert to the May 1 2012 Maxmind GeoLite Country database. In the
24132 June 2012 database, Maxmind marked many Tor relays as country "A1",
24133 which will cause risky behavior for clients that set EntryNodes
24134 or ExitNodes. Addresses bug 6334; bugfix on 0.2.3.17-beta.
24135 - Instead of ENOBUFS on Windows, say WSAENOBUFS. Fixes compilation
24136 on Windows. Fixes bug 6296; bugfix on 0.2.3.18-rc.
24139 - Fix wrong TCP port range in parse_port_range(). Fixes bug 6218;
24140 bugfix on 0.2.1.10-alpha.
24143 Changes in version 0.2.3.18-rc - 2012-06-28
24144 Tor 0.2.3.18-rc is the first release candidate for the Tor 0.2.3.x
24145 series. It fixes a few smaller bugs, but generally appears stable.
24146 Please test it and let us know whether it is!
24149 - Allow wildcarded mapaddress targets to be specified on the
24150 controlport. Partially fixes bug 6244; bugfix on 0.2.3.9-alpha.
24151 - Make our linker option detection code more robust against linkers
24152 such as on FreeBSD 8, where a bad combination of options completes
24153 successfully but makes an unrunnable binary. Fixes bug 6173;
24154 bugfix on 0.2.3.17-beta.
24156 o Minor bugfixes (on 0.2.2.x and earlier):
24157 - Avoid a false positive in the util/threads unit test by increasing
24158 the maximum timeout time. Fixes bug 6227; bugfix on 0.2.0.4-alpha.
24159 - Replace "Sending publish request" log messages with "Launching
24160 upload", so that they no longer confusingly imply that we're
24161 sending something to a directory we might not even be connected
24162 to yet. Fixes bug 3311; bugfix on 0.2.0.10-alpha.
24163 - Make sure to set *socket_error in all error cases in
24164 connection_connect(), so it can't produce a warning about
24165 errno being zero from errno_to_orconn_end_reason(). Bugfix on
24166 0.2.1.1-alpha; resolves ticket 6028.
24167 - Downgrade "Got a certificate, but we already have it" log messages
24168 from warning to info, except when we're a dirauth. Fixes bug 5238;
24169 bugfix on 0.2.1.7-alpha.
24170 - When checking for requested signatures on the latest consensus
24171 before serving it to a client, make sure to check the right
24172 consensus flavor. Bugfix on 0.2.2.6-alpha.
24173 - Downgrade "eventdns rejected address" message to LOG_PROTOCOL_WARN.
24174 Fixes bug 5932; bugfix on 0.2.2.7-alpha.
24176 o Minor bugfixes (on 0.2.3.x):
24177 - Make format_helper_exit_status() avoid unnecessary space padding
24178 and stop confusing log_from_pipe(). Fixes ticket 5557; bugfix
24180 - Downgrade a message about cleaning the microdescriptor cache to
24181 "info" from "notice". Fixes bug 6238; bugfix on 0.2.3.1-alpha.
24182 - Log a BUG message at severity INFO if we have a networkstatus with
24183 a missing entry for some microdescriptor. Continues on a patch
24185 - Improve the log message when a managed proxy fails to launch. Fixes
24186 bug 5099; bugfix on 0.2.3.6-alpha.
24187 - Don't do DNS lookups when parsing corrupted managed proxy protocol
24188 messages. Fixes bug 6226; bugfix on 0.2.3.6-alpha.
24189 - When formatting wildcarded address mappings for the controller,
24190 be sure to include "*." as appropriate. Partially fixes bug 6244;
24191 bugfix on 0.2.3.9-alpha.
24192 - Avoid a warning caused by using strcspn() from glibc with clang 3.0.
24193 Bugfix on 0.2.3.13-alpha.
24194 - Stop logging messages about running with circuit timeout learning
24195 enabled at severity LD_BUG. Fixes bug 6169; bugfix on 0.2.3.17-beta.
24196 - Disable a spurious warning about reading on a marked and flushing
24197 connection. We shouldn't be doing that, but apparently we
24198 sometimes do. Fixes bug 6203; bugfix on 0.2.3.17-beta.
24199 - Fix a bug that stopped AllowDotExit from working on addresses
24200 that had an entry in the DNS cache. Fixes bug 6211; bugfix on
24203 o Code simplification, refactoring, unit tests:
24204 - Move tor_gettimeofday_cached() into compat_libevent.c, and use
24205 Libevent's notion of cached time when possible.
24206 - Remove duplicate code for invoking getrlimit() from control.c.
24207 - Add a unit test for the environment_variable_names_equal function.
24210 - Document the --defaults-torrc option, and the new (in 0.2.3)
24211 semantics for overriding, extending, and clearing lists of
24212 options. Closes bug 4748.
24215 Changes in version 0.2.3.17-beta - 2012-06-15
24216 Tor 0.2.3.17-beta enables compiler and linker hardening by default,
24217 gets our TLS handshake back on track for being able to blend in with
24218 Firefox, fixes a big bug in 0.2.3.16-alpha that broke Tor's interaction
24219 with Vidalia, and otherwise continues to get us closer to a release
24223 - Enable gcc and ld hardening by default. Resolves ticket 5210.
24224 - Update TLS cipher list to match Firefox 8 and later. Resolves
24226 - Implement the client side of proposal 198: remove support for
24227 clients falsely claiming to support standard ciphersuites that
24228 they can actually provide. As of modern OpenSSL versions, it's not
24229 necessary to fake any standard ciphersuite, and doing so prevents
24230 us from using better ciphersuites in the future, since servers
24231 can't know whether an advertised ciphersuite is really supported or
24232 not. Some hosts -- notably, ones with very old versions of OpenSSL
24233 or where OpenSSL has been built with ECC disabled -- will stand
24234 out because of this change; TBB users should not be affected.
24237 - Change the default value for DynamicDHGroups (introduced in
24238 0.2.3.9-alpha) to 0. This feature can make Tor relays less
24239 identifiable by their use of the mod_ssl DH group, but at
24240 the cost of some usability (#4721) and bridge tracing (#6087)
24241 regressions. Resolves ticket 5598.
24242 - Send a CRLF at the end of each STATUS_* control protocol event. This
24243 bug tickled a bug in Vidalia which would make it freeze. Fixes
24244 bug 6094; bugfix on 0.2.3.16-alpha.
24247 - Disable writing on marked-for-close connections when they are
24248 blocked on bandwidth, to prevent busy-looping in Libevent. Fixes
24249 bug 5263; bugfix on 0.0.2pre13, where we first added a special
24250 case for flushing marked connections.
24251 - Detect SSL handshake even when the initial attempt to write the
24252 server hello fails. Fixes bug 4592; bugfix on 0.2.0.13-alpha.
24253 - Change the AllowDotExit rules so they should actually work.
24254 We now enforce AllowDotExit only immediately after receiving an
24255 address via SOCKS or DNSPort: other sources are free to provide
24256 .exit addresses after the resolution occurs. Fixes bug 3940;
24257 bugfix on 0.2.2.1-alpha.
24258 - Fix a (harmless) integer overflow in cell statistics reported by
24259 some fast relays. Fixes bug 5849; bugfix on 0.2.2.1-alpha.
24260 - Make sure circuitbuild.c checks LearnCircuitBuildTimeout in all the
24261 right places and never depends on the consensus parameters or
24262 computes adaptive timeouts when it is disabled. Fixes bug 5049;
24263 bugfix on 0.2.2.14-alpha.
24264 - When building Tor on Windows with -DUNICODE (not default), ensure
24265 that error messages, filenames, and DNS server names are always
24266 NUL-terminated when we convert them to a single-byte encoding.
24267 Fixes bug 5909; bugfix on 0.2.2.16-alpha.
24268 - Make Tor build correctly again with -DUNICODE -D_UNICODE defined.
24269 Fixes bug 6097; bugfix on 0.2.2.16-alpha.
24270 - Fix an edge case where TestingTorNetwork is set but the authorities
24271 and relays all have an uptime of zero, where the private Tor network
24272 could briefly lack support for hidden services. Fixes bug 3886;
24273 bugfix on 0.2.2.18-alpha.
24274 - Correct the manpage's descriptions for the default values of
24275 DirReqStatistics and ExtraInfoStatistics. Fixes bug 2865; bugfix
24277 - Fix the documentation for the --hush and --quiet command line
24278 options, which changed their behavior back in 0.2.3.3-alpha.
24279 - Fix compilation warning with clang 3.1. Fixes bug 6141; bugfix on
24283 - Rate-limit the "Weighted bandwidth is 0.000000" message, and add
24284 more information to it, so that we can track it down in case it
24285 returns again. Mitigates bug 5235.
24286 - Check CircuitBuildTimeout and LearnCircuitBuildTimeout in
24287 options_validate(); warn if LearnCircuitBuildTimeout is disabled and
24288 CircuitBuildTimeout is set unreasonably low. Resolves ticket 5452.
24289 - Warn the user when HTTPProxy, but no other proxy type, is
24290 configured. This can cause surprising behavior: it doesn't send
24291 all of Tor's traffic over the HTTPProxy -- it sends unencrypted
24292 directory traffic only. Resolves ticket 4663.
24293 - Issue a notice if a guard completes less than 40% of your circuits.
24294 Threshold is configurable by torrc option PathBiasNoticeRate and
24295 consensus parameter pb_noticepct. There is additional, off-by-
24296 default code to disable guards which fail too many circuits.
24297 Addresses ticket 5458.
24298 - Update to the June 6 2012 Maxmind GeoLite Country database.
24300 o Code simplifications and refactoring:
24301 - Remove validate_pluggable_transports_config(): its warning
24302 message is now handled by connection_or_connect().
24305 Changes in version 0.2.2.37 - 2012-06-06
24306 Tor 0.2.2.37 introduces a workaround for a critical renegotiation
24307 bug in OpenSSL 1.0.1 (where 20% of the Tor network can't talk to itself
24311 - Work around a bug in OpenSSL that broke renegotiation with TLS
24312 1.1 and TLS 1.2. Without this workaround, all attempts to speak
24313 the v2 Tor connection protocol when both sides were using OpenSSL
24314 1.0.1 would fail. Resolves ticket 6033.
24315 - When waiting for a client to renegotiate, don't allow it to add
24316 any bytes to the input buffer. This fixes a potential DoS issue.
24317 Fixes bugs 5934 and 6007; bugfix on 0.2.0.20-rc.
24318 - Fix an edge case where if we fetch or publish a hidden service
24319 descriptor, we might build a 4-hop circuit and then use that circuit
24320 for exiting afterwards -- even if the new last hop doesn't obey our
24321 ExitNodes config option. Fixes bug 5283; bugfix on 0.2.0.10-alpha.
24324 - Fix a build warning with Clang 3.1 related to our use of vasprintf.
24325 Fixes bug 5969. Bugfix on 0.2.2.11-alpha.
24328 - Tell GCC and Clang to check for any errors in format strings passed
24329 to the tor_v*(print|scan)f functions.
24332 Changes in version 0.2.3.16-alpha - 2012-06-05
24333 Tor 0.2.3.16-alpha introduces a workaround for a critical renegotiation
24334 bug in OpenSSL 1.0.1 (where 20% of the Tor network can't talk to itself
24335 currently). It also fixes a variety of smaller bugs and other cleanups
24336 that get us closer to a release candidate.
24338 o Major bugfixes (general):
24339 - Work around a bug in OpenSSL that broke renegotiation with TLS
24340 1.1 and TLS 1.2. Without this workaround, all attempts to speak
24341 the v2 Tor connection protocol when both sides were using OpenSSL
24342 1.0.1 would fail. Resolves ticket 6033.
24343 - When waiting for a client to renegotiate, don't allow it to add
24344 any bytes to the input buffer. This fixes a potential DoS issue.
24345 Fixes bugs 5934 and 6007; bugfix on 0.2.0.20-rc.
24346 - Pass correct OR address to managed proxies (like obfsproxy),
24347 even when ORListenAddress is used. Fixes bug 4865; bugfix on
24349 - The advertised platform of a router now includes only its operating
24350 system's name (e.g., "Linux", "Darwin", "Windows 7"), and not its
24351 service pack level (for Windows) or its CPU architecture (for Unix).
24352 We also no longer include the "git-XYZ" tag in the version. Resolves
24355 o Major bugfixes (clients):
24356 - If we are unable to find any exit that supports our predicted ports,
24357 stop calling them predicted, so that we don't loop and build
24358 hopeless circuits indefinitely. Fixes bug 3296; bugfix on 0.0.9pre6,
24359 which introduced predicted ports.
24360 - Fix an edge case where if we fetch or publish a hidden service
24361 descriptor, we might build a 4-hop circuit and then use that circuit
24362 for exiting afterwards -- even if the new last hop doesn't obey our
24363 ExitNodes config option. Fixes bug 5283; bugfix on 0.2.0.10-alpha.
24364 - Check at each new consensus whether our entry guards were picked
24365 long enough ago that we should rotate them. Previously, we only
24366 did this check at startup, which could lead to us holding a guard
24367 indefinitely. Fixes bug 5380; bugfix on 0.2.1.14-rc.
24368 - When fetching a bridge descriptor from a bridge authority,
24369 always do so anonymously, whether we have been able to open
24370 circuits or not. Partial fix for bug 1938; bugfix on 0.2.0.7-alpha.
24371 This behavior makes it *safer* to use UpdateBridgesFromAuthority,
24372 but we'll need to wait for bug 6010 before it's actually usable.
24374 o Major bugfixes (directory authorities):
24375 - When computing weight parameters, behave more robustly in the
24376 presence of a bad bwweightscale value. Previously, the authorities
24377 would crash if they agreed on a sufficiently broken weight_scale
24378 value: now, they use a reasonable default and carry on. Partial
24379 fix for 5786; bugfix on 0.2.2.17-alpha.
24380 - Check more thoroughly to prevent a rogue authority from
24381 double-voting on any consensus directory parameter. Previously,
24382 authorities would crash in this case if the total number of
24383 votes for any parameter exceeded the number of active voters,
24384 but would let it pass otherwise. Partial fix for bug 5786; bugfix
24388 - Rate-limit log messages when asked to connect anonymously to
24389 a private address. When these hit, they tended to hit fast and
24390 often. Also, don't bother trying to connect to addresses that we
24391 are sure will resolve to 127.0.0.1: getting 127.0.0.1 in a directory
24392 reply makes us think we have been lied to, even when the address the
24393 client tried to connect to was "localhost." Resolves ticket 2822.
24394 - Allow packagers to insert an extra string in server descriptor
24395 platform lines by setting the preprocessor variable TOR_BUILD_TAG.
24396 Resolves the rest of ticket 2988.
24397 - Raise the threshold of server descriptors needed (75%) and exit
24398 server descriptors needed (50%) before we will declare ourselves
24399 bootstrapped. This will make clients start building circuits a
24400 little later, but makes the initially constructed circuits less
24401 skewed and less in conflict with further directory fetches. Fixes
24403 - Close any connection that sends unrecognized junk before the
24404 handshake. Solves an issue noted in bug 4369.
24405 - Improve log messages about managed transports. Resolves ticket 5070.
24406 - Tag a bridge's descriptor as "never to be sent unencrypted".
24407 This shouldn't matter, since bridges don't open non-anonymous
24408 connections to the bridge authority and don't allow unencrypted
24409 directory connections from clients, but we might as well make
24410 sure. Closes bug 5139.
24411 - Expose our view of whether we have gone dormant to the controller,
24412 via a new "GETINFO dormant" value. Torbutton and other controllers
24413 can use this to avoid doing periodic requests through Tor while
24414 it's dormant (bug 4718). Fixes bug 5954.
24415 - Tell GCC and Clang to check for any errors in format strings passed
24416 to the tor_v*(print|scan)f functions.
24417 - Update to the May 1 2012 Maxmind GeoLite Country database.
24419 o Minor bugfixes (already included in 0.2.2.36):
24420 - Reject out-of-range times like 23:59:61 in parse_rfc1123_time().
24421 Fixes bug 5346; bugfix on 0.0.8pre3.
24422 - Correct parsing of certain date types in parse_http_time().
24423 Without this patch, If-Modified-Since would behave
24424 incorrectly. Fixes bug 5346; bugfix on 0.2.0.2-alpha. Patch from
24425 Esteban Manchado Velázques.
24426 - Make our number-parsing functions always treat too-large values
24427 as an error, even when those values exceed the width of the
24428 underlying type. Previously, if the caller provided these
24429 functions with minima or maxima set to the extreme values of the
24430 underlying integer type, these functions would return those
24431 values on overflow rather than treating overflow as an error.
24432 Fixes part of bug 5786; bugfix on 0.0.9.
24433 - If we hit the error case where routerlist_insert() replaces an
24434 existing (old) server descriptor, make sure to remove that
24435 server descriptor from the old_routers list. Fix related to bug
24436 1776. Bugfix on 0.2.2.18-alpha.
24437 - Clarify the behavior of MaxCircuitDirtiness with hidden service
24438 circuits. Fixes issue 5259.
24440 o Minor bugfixes (coding cleanup, on 0.2.2.x and earlier):
24441 - Prevent a null-pointer dereference when receiving a data cell
24442 for a nonexistent stream when the circuit in question has an
24443 empty deliver window. We don't believe this is triggerable,
24444 since we don't currently allow deliver windows to become empty,
24445 but the logic is tricky enough that it's better to make the code
24446 robust. Fixes bug 5541; bugfix on 0.0.2pre14.
24447 - Fix a memory leak when trying to launch a DNS request when the
24448 network is disabled or the nameservers are unconfigurable. Fixes
24449 bug 5916; bugfix on Tor 0.1.2.1-alpha (for the unconfigurable
24450 nameserver case) and on 0.2.3.9-alpha (for the DisableNetwork case).
24451 - Don't hold a Windows file handle open for every file mapping;
24452 the file mapping handle is sufficient. Fixes bug 5951; bugfix on
24454 - Avoid O(n^2) performance characteristics when parsing a large
24455 extrainfo cache. Fixes bug 5828; bugfix on 0.2.0.1-alpha.
24456 - Format more doubles with %f, not %lf. Patch from grarpamp to make
24457 Tor build correctly on older BSDs again. Fixes bug 3894; bugfix on
24459 - Make our replacement implementation of strtok_r() compatible with
24460 the standard behavior of strtok_r(). Patch by nils. Fixes bug 5091;
24461 bugfix on 0.2.2.1-alpha.
24462 - Fix a NULL-pointer dereference on a badly formed
24463 SETCIRCUITPURPOSE command. Found by mikeyc. Fixes bug 5796;
24464 bugfix on 0.2.2.9-alpha.
24465 - Fix a build warning with Clang 3.1 related to our use of vasprintf.
24466 Fixes bug 5969. Bugfix on 0.2.2.11-alpha.
24467 - Defensively refactor rend_mid_rendezvous() so that protocol
24468 violations and length checks happen in the beginning. Fixes
24470 - Set _WIN32_WINNT to 0x0501 consistently throughout the code, so
24471 that IPv6 stuff will compile on MSVC, and compilation issues
24472 will be easier to track down. Fixes bug 5861.
24474 o Minor bugfixes (correctness, on 0.2.2.x and earlier):
24475 - Exit nodes now correctly report EADDRINUSE and EADDRNOTAVAIL as
24476 resource exhaustion, so that clients can adjust their load to
24477 try other exits. Fixes bug 4710; bugfix on 0.1.0.1-rc, which
24478 started using END_STREAM_REASON_RESOURCELIMIT.
24479 - Don't check for whether the address we're using for outbound
24480 connections has changed until after the outbound connection has
24481 completed. On Windows, getsockname() doesn't succeed until the
24482 connection is finished. Fixes bug 5374; bugfix on 0.1.1.14-alpha.
24483 - If the configuration tries to set MyFamily on a bridge, refuse to
24484 do so, and warn about the security implications. Fixes bug 4657;
24485 bugfix on 0.2.0.3-alpha.
24486 - If the client fails to set a reasonable set of ciphersuites
24487 during its v2 handshake renegotiation, allow the renegotiation to
24488 continue nevertheless (i.e. send all the required certificates).
24489 Fixes bug 4591; bugfix on 0.2.0.20-rc.
24490 - When we receive a SIGHUP and the controller __ReloadTorrcOnSIGHUP
24491 option is set to 0 (which Vidalia version 0.2.16 now does when
24492 a SAVECONF attempt fails), perform other actions that SIGHUP
24493 usually causes (like reopening the logs). Fixes bug 5095; bugfix
24495 - If we fail to write a microdescriptor to the disk cache, do not
24496 continue replacing the old microdescriptor file. Fixes bug 2954;
24497 bugfix on 0.2.2.6-alpha.
24498 - Exit nodes don't need to fetch certificates for authorities that
24499 they don't recognize; only directory authorities, bridges,
24500 and caches need to do that. Fixes part of bug 2297; bugfix on
24502 - Correctly handle checking the permissions on the parent
24503 directory of a control socket in the root directory. Bug found
24504 by Esteban Manchado Velázquez. Fixes bug 5089; bugfix on Tor
24506 - When told to add a bridge with the same digest as a preexisting
24507 bridge but a different addr:port, change the addr:port as
24508 requested. Previously we would not notice the change. Fixes half
24509 of bug 5603; fix on 0.2.2.26-beta.
24510 - End AUTHCHALLENGE error messages (in the control protocol) with
24511 a CRLF. Fixes bug 5760; bugfix on 0.2.2.36 and 0.2.3.13-alpha.
24513 o Minor bugfixes (on 0.2.3.x):
24514 - Turn an assertion (that the number of handshakes received as a
24515 server is not < 1) into a warning. Fixes bug 4873; bugfix on
24517 - Format IPv4 addresses correctly in ADDRMAP events. (Previously,
24518 we had reversed them when the answer was cached.) Fixes bug
24519 5723; bugfix on 0.2.3.1-alpha.
24520 - Work correctly on Linux systems with accept4 support advertised in
24521 their headers, but without accept4 support in the kernel. Fix
24522 by murb. Fixes bug 5762; bugfix on 0.2.3.1-alpha.
24523 - When told to add a bridge with the same addr:port as a preexisting
24524 bridge but a different transport, change the transport as
24525 requested. Previously we would not notice the change. Fixes half
24526 of bug 5603; fix on 0.2.3.2-alpha.
24527 - Avoid a "double-reply" warning when replying to a SOCKS request
24528 with a parse error. Patch from Fabian Keil. Fixes bug 4108;
24529 bugfix on 0.2.3.4-alpha.
24530 - Fix a bug where a bridge authority crashes if it has seen no
24531 directory requests when it's time to write statistics to disk.
24532 Fixes bug 5891; bugfix on 0.2.3.6-alpha. Also fixes bug 5508 in
24534 - Don't try to open non-control listeners when DisableNetwork is set.
24535 Previously, we'd open all listeners, then immediately close them.
24536 Fixes bug 5604; bugfix on 0.2.3.9-alpha.
24537 - Don't abort the managed proxy protocol if the managed proxy
24538 sends us an unrecognized line; ignore it instead. Fixes bug
24539 5910; bugfix on 0.2.3.9-alpha.
24540 - Fix a compile warning in crypto.c when compiling with clang 3.1.
24541 Fixes bug 5969, bugfix on 0.2.3.9-alpha.
24542 - Fix a compilation issue on GNU Hurd, which doesn't have PATH_MAX.
24543 Fixes bug 5355; bugfix on 0.2.3.11-alpha.
24544 - Remove bogus definition of "_WIN32" from src/win32/orconfig.h, to
24545 unbreak the MSVC build. Fixes bug 5858; bugfix on 0.2.3.12-alpha.
24546 - Resolve numerous small warnings and build issues with MSVC. Resolves
24549 o Documentation fixes:
24550 - Improve the manual's documentation for the NT Service command-line
24551 options. Addresses ticket 3964.
24552 - Clarify SessionGroup documentation slightly; resolves ticket 5437.
24553 - Document the changes to the ORPort and DirPort options, and the
24554 fact that {OR/Dir}ListenAddress is now unnecessary (and
24555 therefore deprecated). Resolves ticket 5597.
24558 - Remove the torrc.bridge file: we don't use it for anything, and
24559 it had become badly desynchronized from torrc.sample. Resolves
24563 Changes in version 0.2.2.36 - 2012-05-24
24564 Tor 0.2.2.36 updates the addresses for two of the eight directory
24565 authorities, fixes some potential anonymity and security issues,
24566 and fixes several crash bugs.
24568 Tor 0.2.1.x has reached its end-of-life. Those Tor versions have many
24569 known flaws, and nobody should be using them. You should upgrade. If
24570 you're using a Linux or BSD and its packages are obsolete, stop using
24571 those packages and upgrade anyway.
24573 o Directory authority changes:
24574 - Change IP address for maatuska (v3 directory authority).
24575 - Change IP address for ides (v3 directory authority), and rename
24579 - When building or running with any version of OpenSSL earlier
24580 than 0.9.8s or 1.0.0f, disable SSLv3 support. These OpenSSL
24581 versions have a bug (CVE-2011-4576) in which their block cipher
24582 padding includes uninitialized data, potentially leaking sensitive
24583 information to any peer with whom they make a SSLv3 connection. Tor
24584 does not use SSL v3 by default, but a hostile client or server
24585 could force an SSLv3 connection in order to gain information that
24586 they shouldn't have been able to get. The best solution here is to
24587 upgrade to OpenSSL 0.9.8s or 1.0.0f (or later). But when building
24588 or running with a non-upgraded OpenSSL, we disable SSLv3 entirely
24589 to make sure that the bug can't happen.
24590 - Never use a bridge or a controller-supplied node as an exit, even
24591 if its exit policy allows it. Found by wanoskarnet. Fixes bug
24592 5342. Bugfix on 0.1.1.15-rc (for controller-purpose descriptors)
24593 and 0.2.0.3-alpha (for bridge-purpose descriptors).
24594 - Only build circuits if we have a sufficient threshold of the total
24595 descriptors that are marked in the consensus with the "Exit"
24596 flag. This mitigates an attack proposed by wanoskarnet, in which
24597 all of a client's bridges collude to restrict the exit nodes that
24598 the client knows about. Fixes bug 5343.
24599 - Provide controllers with a safer way to implement the cookie
24600 authentication mechanism. With the old method, if another locally
24601 running program could convince a controller that it was the Tor
24602 process, then that program could trick the controller into telling
24603 it the contents of an arbitrary 32-byte file. The new "SAFECOOKIE"
24604 authentication method uses a challenge-response approach to prevent
24605 this attack. Fixes bug 5185; implements proposal 193.
24608 - Avoid logging uninitialized data when unable to decode a hidden
24609 service descriptor cookie. Fixes bug 5647; bugfix on 0.2.1.5-alpha.
24610 - Avoid a client-side assertion failure when receiving an INTRODUCE2
24611 cell on a general purpose circuit. Fixes bug 5644; bugfix on
24613 - Fix builds when the path to sed, openssl, or sha1sum contains
24614 spaces, which is pretty common on Windows. Fixes bug 5065; bugfix
24616 - Correct our replacements for the timeradd() and timersub() functions
24617 on platforms that lack them (for example, Windows). The timersub()
24618 function is used when expiring circuits, while timeradd() is
24619 currently unused. Bug report and patch by Vektor. Fixes bug 4778;
24620 bugfix on 0.2.2.24-alpha.
24621 - Fix the SOCKET_OK test that we use to tell when socket
24622 creation fails so that it works on Win64. Fixes part of bug 4533;
24623 bugfix on 0.2.2.29-beta. Bug found by wanoskarnet.
24626 - Reject out-of-range times like 23:59:61 in parse_rfc1123_time().
24627 Fixes bug 5346; bugfix on 0.0.8pre3.
24628 - Make our number-parsing functions always treat too-large values
24629 as an error, even when those values exceed the width of the
24630 underlying type. Previously, if the caller provided these
24631 functions with minima or maxima set to the extreme values of the
24632 underlying integer type, these functions would return those
24633 values on overflow rather than treating overflow as an error.
24634 Fixes part of bug 5786; bugfix on 0.0.9.
24635 - Older Linux kernels erroneously respond to strange nmap behavior
24636 by having accept() return successfully with a zero-length
24637 socket. When this happens, just close the connection. Previously,
24638 we would try harder to learn the remote address: but there was
24639 no such remote address to learn, and our method for trying to
24640 learn it was incorrect. Fixes bugs 1240, 4745, and 4747. Bugfix
24641 on 0.1.0.3-rc. Reported and diagnosed by "r1eo".
24642 - Correct parsing of certain date types in parse_http_time().
24643 Without this patch, If-Modified-Since would behave
24644 incorrectly. Fixes bug 5346; bugfix on 0.2.0.2-alpha. Patch from
24645 Esteban Manchado Velázques.
24646 - Change the BridgePassword feature (part of the "bridge community"
24647 design, which is not yet implemented) to use a time-independent
24648 comparison. The old behavior might have allowed an adversary
24649 to use timing to guess the BridgePassword value. Fixes bug 5543;
24650 bugfix on 0.2.0.14-alpha.
24651 - Detect and reject certain misformed escape sequences in
24652 configuration values. Previously, these values would cause us
24653 to crash if received in a torrc file or over an authenticated
24654 control port. Bug found by Esteban Manchado Velázquez, and
24655 independently by Robert Connolly from Matta Consulting who further
24656 noted that it allows a post-authentication heap overflow. Patch
24657 by Alexander Schrijver. Fixes bugs 5090 and 5402 (CVE 2012-1668);
24658 bugfix on 0.2.0.16-alpha.
24659 - Fix a compile warning when using the --enable-openbsd-malloc
24660 configure option. Fixes bug 5340; bugfix on 0.2.0.20-rc.
24661 - During configure, detect when we're building with clang version
24662 3.0 or lower and disable the -Wnormalized=id and -Woverride-init
24663 CFLAGS. clang doesn't support them yet.
24664 - When sending an HTTP/1.1 proxy request, include a Host header.
24665 Fixes bug 5593; bugfix on 0.2.2.1-alpha.
24666 - Fix a NULL-pointer dereference on a badly formed SETCIRCUITPURPOSE
24667 command. Found by mikeyc. Fixes bug 5796; bugfix on 0.2.2.9-alpha.
24668 - If we hit the error case where routerlist_insert() replaces an
24669 existing (old) server descriptor, make sure to remove that
24670 server descriptor from the old_routers list. Fix related to bug
24671 1776. Bugfix on 0.2.2.18-alpha.
24673 o Minor bugfixes (documentation and log messages):
24674 - Fix a typo in a log message in rend_service_rendezvous_has_opened().
24675 Fixes bug 4856; bugfix on Tor 0.0.6.
24676 - Update "ClientOnly" man page entry to explain that there isn't
24677 really any point to messing with it. Resolves ticket 5005.
24678 - Document the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays
24679 directory authority option (introduced in Tor 0.2.2.34).
24680 - Downgrade the "We're missing a certificate" message from notice
24681 to info: people kept mistaking it for a real problem, whereas it
24682 is seldom the problem even when we are failing to bootstrap. Fixes
24683 bug 5067; bugfix on 0.2.0.10-alpha.
24684 - Correctly spell "connect" in a log message on failure to create a
24685 controlsocket. Fixes bug 4803; bugfix on 0.2.2.26-beta.
24686 - Clarify the behavior of MaxCircuitDirtiness with hidden service
24687 circuits. Fixes issue 5259.
24690 - Directory authorities now reject versions of Tor older than
24691 0.2.1.30, and Tor versions between 0.2.2.1-alpha and 0.2.2.20-alpha
24692 inclusive. These versions accounted for only a small fraction of
24693 the Tor network, and have numerous known security issues. Resolves
24695 - Update to the May 1 2012 Maxmind GeoLite Country database.
24698 - When sending or relaying a RELAY_EARLY cell, we used to convert
24699 it to a RELAY cell if the connection was using the v1 link
24700 protocol. This was a workaround for older versions of Tor, which
24701 didn't handle RELAY_EARLY cells properly. Now that all supported
24702 versions can handle RELAY_EARLY cells, and now that we're enforcing
24703 the "no RELAY_EXTEND commands except in RELAY_EARLY cells" rule,
24704 remove this workaround. Addresses bug 4786.
24707 Changes in version 0.2.3.15-alpha - 2012-04-30
24708 Tor 0.2.3.15-alpha fixes a variety of smaller bugs, including making
24709 the development branch build on Windows again.
24711 o Minor bugfixes (on 0.2.2.x and earlier):
24712 - Make sure that there are no unhandled pending TLS errors before
24713 reading from a TLS stream. We had checks in 0.1.0.3-rc, but
24714 lost them in 0.1.0.5-rc when we refactored read_to_buf_tls().
24715 Bugfix on 0.1.0.5-rc; fixes bug 4528.
24716 - Fix an assert that directory authorities could trigger on sighup
24717 during some configuration state transitions. We now don't treat
24718 it as a fatal error when the new descriptor we just generated in
24719 init_keys() isn't accepted. Fixes bug 4438; bugfix on 0.2.1.9-alpha.
24720 - After we pick a directory mirror, we would refuse to use it if
24721 it's in our ExcludeExitNodes list, resulting in mysterious failures
24722 to bootstrap for people who just wanted to avoid exiting from
24723 certain locations. Fixes bug 5623; bugfix on 0.2.2.25-alpha.
24724 - When building with --enable-static-tor on OpenBSD, do not
24725 erroneously attempt to link -lrt. Fixes bug 5103.
24727 o Minor bugfixes (on 0.2.3.x):
24728 - When Tor is built with kernel headers from a recent (last few
24729 years) Linux kernel, do not fail to run on older (pre-2.6.28
24730 Linux kernels). Fixes bug 5112; bugfix on 0.2.3.1-alpha.
24731 - Fix cross-compilation issues with mingw. Bugfixes on 0.2.3.6-alpha
24732 and 0.2.3.12-alpha.
24733 - Fix compilation with miniupnpc version 1.6; patch from
24734 Anthony G. Basile. Fixes bug 5434; bugfix on 0.2.3.12-alpha.
24735 - Fix compilation with MSVC, which had defined MS_WINDOWS. Bugfix
24736 on 0.2.3.13-alpha; found and fixed by Gisle Vanem.
24737 - Fix compilation on platforms without unistd.h, or where environ
24738 is defined in stdlib.h. Fixes bug 5704; bugfix on 0.2.3.13-alpha.
24741 - Directory authorities are now a little more lenient at accepting
24742 older router descriptors, or newer router descriptors that don't
24743 make big changes. This should help ameliorate past and future
24744 issues where routers think they have uploaded valid descriptors,
24745 but the authorities don't think so. Fix for ticket 2479.
24746 - Make the code that clients use to detect an address change be
24747 IPv6-aware, so that it won't fill clients' logs with error
24748 messages when trying to get the IPv4 address of an IPv6
24749 connection. Implements ticket 5537.
24751 o Removed features:
24752 - Remove the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays option;
24753 authorities needed to use it for a while to keep the network working
24754 as people upgraded to 0.2.1.31, 0.2.2.34, or 0.2.3.6-alpha, but
24755 that was six months ago. As of now, it should no longer be needed
24759 Changes in version 0.2.3.14-alpha - 2012-04-23
24760 Tor 0.2.3.14-alpha fixes yet more bugs to get us closer to a release
24761 candidate. It also dramatically speeds up AES: fast relays should
24762 consider switching to the newer OpenSSL library.
24764 o Directory authority changes:
24765 - Change IP address for ides (v3 directory authority), and rename
24769 - Avoid logging uninitialized data when unable to decode a hidden
24770 service descriptor cookie. Fixes bug 5647; bugfix on 0.2.1.5-alpha.
24771 - Avoid a client-side assertion failure when receiving an INTRODUCE2
24772 cell on a general purpose circuit. Fixes bug 5644; bugfix on
24774 - If authorities are unable to get a v2 consensus document from other
24775 directory authorities, they no longer fall back to fetching
24776 them from regular directory caches. Fixes bug 5635; bugfix on
24777 0.2.2.26-beta, where routers stopped downloading v2 consensus
24778 documents entirely.
24779 - When we start a Tor client with a normal consensus already cached,
24780 be willing to download a microdescriptor consensus. Fixes bug 4011;
24781 fix on 0.2.3.1-alpha.
24783 o Major features (performance):
24784 - When built to use OpenSSL 1.0.1, and built for an x86 or x86_64
24785 instruction set, take advantage of OpenSSL's AESNI, bitsliced, or
24786 vectorized AES implementations as appropriate. These can be much,
24787 much faster than other AES implementations.
24789 o Minor bugfixes (0.2.2.x and earlier):
24790 - Don't launch more than 10 service-side introduction-point circuits
24791 for a hidden service in five minutes. Previously, we would consider
24792 launching more introduction-point circuits if at least one second
24793 had passed without any introduction-point circuits failing. Fixes
24794 bug 4607; bugfix on 0.0.7pre1.
24795 - Change the BridgePassword feature (part of the "bridge community"
24796 design, which is not yet implemented) to use a time-independent
24797 comparison. The old behavior might have allowed an adversary
24798 to use timing to guess the BridgePassword value. Fixes bug 5543;
24799 bugfix on 0.2.0.14-alpha.
24800 - Enforce correct return behavior of tor_vsscanf() when the '%%'
24801 pattern is used. Fixes bug 5558. Bugfix on 0.2.1.13.
24802 - When sending an HTTP/1.1 proxy request, include a Host header.
24803 Fixes bug 5593; bugfix on 0.2.2.1-alpha.
24804 - Don't log that we have "decided to publish new relay descriptor"
24805 unless we are actually publishing a descriptor. Fixes bug 3942;
24806 bugfix on 0.2.2.28-beta.
24808 o Minor bugfixes (0.2.3.x):
24809 - Fix a bug where a bridge authority crashes (on a failed assert)
24810 if it has seen no directory requests when it's time to write
24811 statistics to disk. Fixes bug 5508. Bugfix on 0.2.3.6-alpha.
24812 - Fix bug stomping on ORPort option NoListen and ignoring option
24813 NoAdvertise. Fixes bug 5151; bugfix on 0.2.3.9-alpha.
24814 - In the testsuite, provide a large enough buffer in the tor_sscanf
24815 unit test. Otherwise we'd overrun that buffer and crash during
24816 the unit tests. Found by weasel. Fixes bug 5449; bugfix on
24818 - Make sure we create the keys directory if it doesn't exist and we're
24819 about to store the dynamic Diffie-Hellman parameters. Fixes bug
24820 5572; bugfix on 0.2.3.13-alpha.
24821 - Fix a small memory leak when trying to decode incorrect base16
24822 authenticator during SAFECOOKIE authentication. Found by
24823 Coverity Scan. Fixes CID 507. Bugfix on 0.2.3.13-alpha.
24826 - Add more information to a log statement that might help track down
24827 bug 4091. If you're seeing "Bug: tor_addr_is_internal() called with a
24828 non-IP address" messages (or any Bug messages, for that matter!),
24829 please let us know about it.
24830 - Relays now understand an IPv6 address when they get one from a
24831 directory server. Resolves ticket 4875.
24832 - Resolve IPv6 addresses in bridge and entry statistics to country
24833 code "??" which means we at least count them. Resolves ticket 5053;
24834 improves on 0.2.3.9-alpha.
24835 - Update to the April 3 2012 Maxmind GeoLite Country database.
24836 - Begin a doc/state-contents.txt file to explain the contents of
24837 the Tor state file. Fixes bug 2987.
24839 o Default torrc changes:
24840 - Stop listing "socksport 9050" in torrc.sample. We open a socks
24841 port on 9050 by default anyway, so this should not change anything
24843 - Stop mentioning the deprecated *ListenAddress options in
24844 torrc.sample. Fixes bug 5438.
24845 - Document unit of bandwidth related options in sample torrc.
24848 o Removed features:
24849 - The "torify" script no longer supports the "tsocks" socksifier
24850 tool, since tsocks doesn't support DNS and UDP right for Tor.
24851 Everyone should be using torsocks instead. Fixes bugs 3530 and
24852 5180. Based on a patch by "ugh".
24854 o Code refactoring:
24855 - Change the symmetric cipher interface so that creating and
24856 initializing a stream cipher are no longer separate functions.
24857 - Remove all internal support for unpadded RSA. We never used it, and
24858 it would be a bad idea to start.
24861 Changes in version 0.2.3.13-alpha - 2012-03-26
24862 Tor 0.2.3.13-alpha fixes a variety of stability and correctness bugs
24863 in managed pluggable transports, as well as providing other cleanups
24864 that get us closer to a release candidate.
24866 o Directory authority changes:
24867 - Change IP address for maatuska (v3 directory authority).
24870 - Provide controllers with a safer way to implement the cookie
24871 authentication mechanism. With the old method, if another locally
24872 running program could convince a controller that it was the Tor
24873 process, then that program could trick the controller into telling
24874 it the contents of an arbitrary 32-byte file. The new "SAFECOOKIE"
24875 authentication method uses a challenge-response approach to prevent
24876 this attack. Fixes bug 5185, implements proposal 193.
24877 - Never use a bridge or a controller-supplied node as an exit, even
24878 if its exit policy allows it. Found by wanoskarnet. Fixes bug
24879 5342. Bugfix on 0.1.1.15-rc (for controller-purpose descriptors)
24880 and 0.2.0.3-alpha (for bridge-purpose descriptors).
24881 - Only build circuits if we have a sufficient threshold of the total
24882 descriptors that are marked in the consensus with the "Exit"
24883 flag. This mitigates an attack proposed by wanoskarnet, in which
24884 all of a client's bridges collude to restrict the exit nodes that
24885 the client knows about. Fixes bug 5343.
24887 o Major bugfixes (on Tor 0.2.3.x):
24888 - Avoid an assert when managed proxies like obfsproxy are configured,
24889 and we receive HUP signals or setconf attempts too rapidly. This
24890 situation happens most commonly when Vidalia tries to attach to
24891 Tor or tries to configure the Tor it's attached to. Fixes bug 5084;
24892 bugfix on 0.2.3.6-alpha.
24893 - Fix a relay-side pluggable transports bug where managed proxies were
24894 unreachable from the Internet, because Tor asked them to bind on
24895 localhost. Fixes bug 4725; bugfix on 0.2.3.9-alpha.
24896 - Stop discarding command-line arguments when TestingTorNetwork
24897 is set. Discovered by Kevin Bauer. Fixes bug 5373; bugfix on
24898 0.2.3.9-alpha, where task 4552 added support for two layers of
24900 - Resume allowing the unit tests to run in gdb. This was accidentally
24901 made impossible when the DisableDebuggerAttachment option was
24902 introduced. Fixes bug 5448; bugfix on 0.2.3.9-alpha.
24903 - Resume building with nat-pmp support. Fixes bug 4955; bugfix on
24904 0.2.3.11-alpha. Reported by Anthony G. Basile.
24906 o Minor bugfixes (on 0.2.2.x and earlier):
24907 - Ensure we don't cannibalize circuits that are longer than three hops
24908 already, so we don't end up making circuits with 5 or more
24909 hops. Patch contributed by wanoskarnet. Fixes bug 5231; bugfix on
24910 0.1.0.1-rc which introduced cannibalization.
24911 - Detect and reject certain misformed escape sequences in
24912 configuration values. Previously, these values would cause us
24913 to crash if received in a torrc file or over an authenticated
24914 control port. Bug found by Esteban Manchado Velázquez, and
24915 independently by Robert Connolly from Matta Consulting who further
24916 noted that it allows a post-authentication heap overflow. Patch
24917 by Alexander Schrijver. Fixes bugs 5090 and 5402 (CVE 2012-1668);
24918 bugfix on 0.2.0.16-alpha.
24919 - Fix a compile warning when using the --enable-openbsd-malloc
24920 configure option. Fixes bug 5340; bugfix on 0.2.0.20-rc.
24921 - Directory caches no longer refuse to clean out descriptors because
24922 of missing v2 networkstatus documents, unless they're configured
24923 to retrieve v2 networkstatus documents. Fixes bug 4838; bugfix on
24924 0.2.2.26-beta. Patch by Daniel Bryg.
24925 - Update to the latest version of the tinytest unit testing framework.
24926 This includes a couple of bugfixes that can be relevant for
24927 running forked unit tests on Windows, and removes all reserved
24930 o Minor bugfixes (on 0.2.3.x):
24931 - On a failed pipe() call, don't leak file descriptors. Fixes bug
24932 4296; bugfix on 0.2.3.1-alpha.
24933 - Spec conformance: on a v3 handshake, do not send a NETINFO cell
24934 until after we have received a CERTS cell. Fixes bug 4361; bugfix
24935 on 0.2.3.6-alpha. Patch by "frosty".
24936 - When binding to an IPv6 address, set the IPV6_V6ONLY socket
24937 option, so that the IP stack doesn't decide to use it for IPv4
24938 too. Fixes bug 4760; bugfix on 0.2.3.9-alpha.
24939 - Ensure that variables set in Tor's environment cannot override
24940 environment variables that Tor passes to a managed
24941 pluggable-transport proxy. Previously, Tor would pass every
24942 variable in its environment to managed proxies along with the new
24943 ones, in such a way that on many operating systems, the inherited
24944 environment variables would override those which Tor tried to
24945 explicitly set. Bugfix on 0.2.3.12-alpha for most Unixoid systems;
24946 bugfix on 0.2.3.9-alpha for Windows.
24949 - A wide variety of new unit tests by Esteban Manchado Velázquez.
24950 - Shorten links in the tor-exit-notice file. Patch by Christian Kujau.
24951 - Update to the March 6 2012 Maxmind GeoLite Country database.
24954 Changes in version 0.2.3.12-alpha - 2012-02-13
24955 Tor 0.2.3.12-alpha lets fast exit relays scale better, allows clients
24956 to use bridges that run Tor 0.2.2.x, and resolves several big bugs
24957 when Tor is configured to use a pluggable transport like obfsproxy.
24960 - Fix builds when the path to sed, openssl, or sha1sum contains
24961 spaces, which is pretty common on Windows. Fixes bug 5065; bugfix
24963 - Set the SO_REUSEADDR socket option before we call bind() on outgoing
24964 connections. This change should allow busy exit relays to stop
24965 running out of available sockets as quickly. Fixes bug 4950;
24966 bugfix on 0.2.2.26-beta.
24967 - Allow 0.2.3.x clients to use 0.2.2.x bridges. Previously the client
24968 would ask the bridge for microdescriptors, which are only supported
24969 in 0.2.3.x, and then fail to bootstrap when it didn't get the
24970 answers it wanted. Fixes bug 4013; bugfix on 0.2.3.2-alpha.
24971 - Properly set up obfsproxy's environment when in managed mode. The
24972 Tor Browser Bundle needs LD_LIBRARY_PATH to be passed to obfsproxy,
24973 and when you run your Tor as a daemon, there's no HOME. Fixes bugs
24974 5076 and 5082; bugfix on 0.2.3.6-alpha.
24977 - Use the dead_strip option when building Tor on OS X. This reduces
24978 binary size by almost 19% when linking openssl and libevent
24979 statically, which we do for Tor Browser Bundle.
24980 - Fix broken URLs in the sample torrc file, and tell readers about
24981 the OutboundBindAddress, ExitPolicyRejectPrivate, and
24982 PublishServerDescriptor options. Addresses bug 4652.
24983 - Update to the February 7 2012 Maxmind GeoLite Country database.
24986 - Downgrade the "We're missing a certificate" message from notice
24987 to info: people kept mistaking it for a real problem, whereas it
24988 is seldom the problem even when we are failing to bootstrap. Fixes
24989 bug 5067; bugfix on 0.2.0.10-alpha.
24990 - Don't put "TOR_PT_EXTENDED_SERVER_PORT=127.0.0.1:4200" in a
24991 managed pluggable transport server proxy's environment.
24992 Previously, we would put it there, even though Tor doesn't
24993 implement an 'extended server port' yet, and even though Tor
24994 almost certainly isn't listening at that address. For now, we set
24995 it to an empty string to avoid crashing older obfsproxies. Bugfix
24997 - Log the heartbeat message every HeartbeatPeriod seconds, not every
24998 HeartbeatPeriod + 1 seconds. Fixes bug 4942; bugfix on
24999 0.2.3.1-alpha. Bug reported by Scott Bennett.
25000 - Calculate absolute paths correctly on Windows. Fixes bug 4973;
25001 bugfix on 0.2.3.11-alpha.
25002 - Update "ClientOnly" man page entry to explain that there isn't
25003 really any point to messing with it. Resolves ticket 5005.
25004 - Use the correct CVE number for CVE-2011-4576 in our comments and
25005 log messages. Found by "fermenthor". Resolves bug 5066; bugfix on
25008 o Code simplifications and refactoring:
25009 - Use the _WIN32 macro throughout our code to detect Windows.
25010 (Previously we had used the obsolete 'WIN32' and the idiosyncratic
25014 Changes in version 0.2.3.11-alpha - 2012-01-22
25015 Tor 0.2.3.11-alpha marks feature-freeze for the 0.2.3 tree. It deploys
25016 the last step of the plan to limit maximum circuit length, includes
25017 a wide variety of hidden service performance and correctness fixes,
25018 works around an OpenSSL security flaw if your distro is too stubborn
25019 to upgrade, and fixes a bunch of smaller issues.
25022 - Now that Tor 0.2.0.x is completely deprecated, enable the final
25023 part of "Proposal 110: Avoiding infinite length circuits" by
25024 refusing all circuit-extend requests that do not use a relay_early
25025 cell. This change helps Tor resist a class of denial-of-service
25026 attacks by limiting the maximum circuit length.
25027 - Adjust the number of introduction points that a hidden service
25028 will try to maintain based on how long its introduction points
25029 remain in use and how many introductions they handle. Fixes
25031 - Try to use system facilities for enumerating local interface
25032 addresses, before falling back to our old approach (which was
25033 binding a UDP socket, and calling getsockname() on it). That
25034 approach was scaring OS X users whose draconian firewall
25035 software warned about binding to UDP sockets, regardless of
25036 whether packets were sent. Now we try to use getifaddrs(),
25037 SIOCGIFCONF, or GetAdaptersAddresses(), depending on what the
25038 system supports. Resolves ticket 1827.
25040 o Major security workaround:
25041 - When building or running with any version of OpenSSL earlier
25042 than 0.9.8s or 1.0.0f, disable SSLv3 support. These OpenSSL
25043 versions have a bug (CVE-2011-4576) in which their block cipher
25044 padding includes uninitialized data, potentially leaking sensitive
25045 information to any peer with whom they make a SSLv3 connection. Tor
25046 does not use SSL v3 by default, but a hostile client or server
25047 could force an SSLv3 connection in order to gain information that
25048 they shouldn't have been able to get. The best solution here is to
25049 upgrade to OpenSSL 0.9.8s or 1.0.0f (or later). But when building
25050 or running with a non-upgraded OpenSSL, we disable SSLv3 entirely
25051 to make sure that the bug can't happen.
25054 - Fix the SOCKET_OK test that we use to tell when socket
25055 creation fails so that it works on Win64. Fixes part of bug 4533;
25056 bugfix on 0.2.2.29-beta. Bug found by wanoskarnet.
25057 - Correct our replacements for the timeradd() and timersub() functions
25058 on platforms that lack them (for example, Windows). The timersub()
25059 function is used when expiring circuits, while timeradd() is
25060 currently unused. Bug report and patch by Vektor. Fixes bug 4778;
25061 bugfix on 0.2.2.24-alpha and 0.2.3.1-alpha.
25062 - Do not use OpenSSL 1.0.0's counter mode: it has a critical bug
25063 that was fixed in OpenSSL 1.0.0a. We test for the counter mode
25064 bug at runtime, not compile time, because some distributions hack
25065 their OpenSSL to mis-report its version. Fixes bug 4779; bugfix
25066 on 0.2.3.9-alpha. Found by Pascal.
25068 o Minor features (controller):
25069 - Use absolute path names when reporting the torrc filename in the
25070 control protocol, so a controller can more easily find the torrc
25071 file. Resolves bug 1101.
25072 - Extend the control protocol to report flags that control a circuit's
25073 path selection in CIRC events and in replies to 'GETINFO
25074 circuit-status'. Implements part of ticket 2411.
25075 - Extend the control protocol to report the hidden service address
25076 and current state of a hidden-service-related circuit in CIRC
25077 events and in replies to 'GETINFO circuit-status'. Implements part
25079 - When reporting the path to the cookie file to the controller,
25080 give an absolute path. Resolves ticket 4881.
25081 - Allow controllers to request an event notification whenever a
25082 circuit is cannibalized or its purpose is changed. Implements
25083 part of ticket 3457.
25084 - Include the creation time of a circuit in CIRC and CIRC2
25085 control-port events and the list produced by the 'GETINFO
25086 circuit-status' control-port command.
25088 o Minor features (directory authorities):
25089 - Directory authorities now reject versions of Tor older than
25090 0.2.1.30, and Tor versions between 0.2.2.1-alpha and 0.2.2.20-alpha
25091 inclusive. These versions accounted for only a small fraction of
25092 the Tor network, and have numerous known security issues. Resolves
25094 - Authority operators can now vote for all relays in a given
25095 set of countries to be BadDir/BadExit/Invalid/Rejected.
25096 - Provide two consensus parameters (FastFlagMinThreshold and
25097 FastFlagMaxThreshold) to control the range of allowable bandwidths
25098 for the Fast directory flag. These allow authorities to run
25099 experiments on appropriate requirements for being a "Fast" node.
25100 The AuthDirFastGuarantee config value still applies. Implements
25102 - Document the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays
25103 directory authority option (introduced in Tor 0.2.2.34).
25105 o Minor features (other):
25106 - Don't disable the DirPort when we cannot exceed our AccountingMax
25107 limit during this interval because the effective bandwidthrate is
25108 low enough. This is useful in a situation where AccountMax is only
25109 used as an additional safeguard or to provide statistics.
25110 - Prepend an informative header to generated dynamic_dh_params files.
25111 - If EntryNodes are given, but UseEntryGuards is set to 0, warn that
25112 EntryNodes will have no effect. Resolves issue 2571.
25113 - Log more useful messages when we fail to disable debugger
25115 - Log which authority we're missing votes from when we go to fetch
25116 them from the other auths.
25117 - Log (at debug level) whenever a circuit's purpose is changed.
25118 - Add missing documentation for the MaxClientCircuitsPending,
25119 UseMicrodescriptors, UserspaceIOCPBuffers, and
25120 _UseFilteringSSLBufferevents options, all introduced during
25121 the 0.2.3.x series.
25122 - Update to the January 3 2012 Maxmind GeoLite Country database.
25124 o Minor bugfixes (hidden services):
25125 - Don't close hidden service client circuits which have almost
25126 finished connecting to their destination when they reach
25127 the normal circuit-build timeout. Previously, we would close
25128 introduction circuits which are waiting for an acknowledgement
25129 from the introduction point, and rendezvous circuits which have
25130 been specified in an INTRODUCE1 cell sent to a hidden service,
25131 after the normal CBT. Now, we mark them as 'timed out', and launch
25132 another rendezvous attempt in parallel. This behavior change can
25133 be disabled using the new CloseHSClientCircuitsImmediatelyOnTimeout
25134 option. Fixes part of bug 1297; bugfix on 0.2.2.2-alpha.
25135 - Don't close hidden-service-side rendezvous circuits when they
25136 reach the normal circuit-build timeout. This behavior change can
25137 be disabled using the new
25138 CloseHSServiceRendCircuitsImmediatelyOnTimeout option. Fixes the
25139 remaining part of bug 1297; bugfix on 0.2.2.2-alpha.
25140 - Make sure we never mark the wrong rendezvous circuit as having
25141 had its introduction cell acknowledged by the introduction-point
25142 relay. Previously, when we received an INTRODUCE_ACK cell on a
25143 client-side hidden-service introduction circuit, we might have
25144 marked a rendezvous circuit other than the one we specified in
25145 the INTRODUCE1 cell as INTRO_ACKED, which would have produced
25146 a warning message and interfered with the hidden service
25147 connection-establishment process. Fixes bug 4759; bugfix on
25148 0.2.3.3-alpha, when we added the stream-isolation feature which
25149 might cause Tor to open multiple rendezvous circuits for the same
25151 - Don't trigger an assertion failure when we mark a new client-side
25152 hidden-service introduction circuit for close during the process
25153 of creating it. Fixes bug 4796; bugfix on 0.2.3.6-alpha. Reported
25156 o Minor bugfixes (log messages):
25157 - Correctly spell "connect" in a log message on failure to create a
25158 controlsocket. Fixes bug 4803; bugfix on 0.2.2.26-beta and
25160 - Fix a typo in a log message in rend_service_rendezvous_has_opened().
25161 Fixes bug 4856; bugfix on Tor 0.0.6.
25162 - Fix the log message describing how we work around discovering
25163 that our version is the ill-fated OpenSSL 0.9.8l. Fixes bug
25164 4837; bugfix on 0.2.2.9-alpha.
25165 - When logging about a disallowed .exit name, do not also call it
25166 an "invalid onion address". Fixes bug 3325; bugfix on 0.2.2.9-alpha.
25168 o Minor bugfixes (build fixes):
25169 - During configure, detect when we're building with clang version
25170 3.0 or lower and disable the -Wnormalized=id and -Woverride-init
25171 CFLAGS. clang doesn't support them yet.
25172 - During configure, search for library containing cos function as
25173 libm lives in libcore on some platforms (BeOS/Haiku). Linking
25174 against libm was hard-coded before. Fixes the first part of bug
25175 4727; bugfix on 0.2.2.2-alpha. Patch and analysis by Martin Hebnes
25177 - Detect attempts to build Tor on (as yet hypothetical) versions
25178 of Windows where sizeof(intptr_t) != sizeof(SOCKET). Partial
25179 fix for bug 4533. Bugfix on 0.2.2.28-beta.
25180 - Preprocessor directives should not be put inside the arguments
25181 of a macro. This would break compilation with GCC releases prior
25182 to version 3.3. We would never recommend such an old GCC version,
25183 but it is apparently required for binary compatibility on some
25184 platforms (namely, certain builds of Haiku). Fixes the other part
25185 of bug 4727; bugfix on 0.2.3.3-alpha. Patch and analysis by Martin
25188 o Minor bugfixes (other):
25189 - Older Linux kernels erroneously respond to strange nmap behavior
25190 by having accept() return successfully with a zero-length
25191 socket. When this happens, just close the connection. Previously,
25192 we would try harder to learn the remote address: but there was
25193 no such remote address to learn, and our method for trying to
25194 learn it was incorrect. Fixes bugs 1240, 4745, and 4747. Bugfix
25195 on 0.1.0.3-rc. Reported and diagnosed by "r1eo".
25196 - Fix null-pointer access that could occur if TLS allocation failed.
25197 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un". This was
25198 erroneously listed as fixed in 0.2.3.9-alpha, but the fix had
25199 accidentally been reverted.
25200 - Fix our implementation of crypto_random_hostname() so it can't
25201 overflow on ridiculously large inputs. (No Tor version has ever
25202 provided this kind of bad inputs, but let's be correct in depth.)
25203 Fixes bug 4413; bugfix on 0.2.2.9-alpha. Fix by Stephen Palmateer.
25204 - Find more places in the code that should have been testing for
25205 invalid sockets using the SOCKET_OK macro. Required for a fix
25206 for bug 4533. Bugfix on 0.2.2.28-beta.
25207 - Fix an assertion failure when, while running with bufferevents, a
25208 connection finishes connecting after it is marked for close, but
25209 before it is closed. Fixes bug 4697; bugfix on 0.2.3.1-alpha.
25210 - test_util_spawn_background_ok() hardcoded the expected value
25211 for ENOENT to 2. This isn't portable as error numbers are
25212 platform specific, and particularly the hurd has ENOENT at
25213 0x40000002. Construct expected string at runtime, using the correct
25214 value for ENOENT. Fixes bug 4733; bugfix on 0.2.3.1-alpha.
25215 - Reject attempts to disable DisableDebuggerAttachment while Tor is
25216 running. Fixes bug 4650; bugfix on 0.2.3.9-alpha.
25217 - Use an appropriate-width type for sockets in tor-fw-helper on
25218 win64. Fixes bug 1983 at last. Bugfix on 0.2.3.9-alpha.
25221 - When sending or relaying a RELAY_EARLY cell, we used to convert
25222 it to a RELAY cell if the connection was using the v1 link
25223 protocol. This was a workaround for older versions of Tor, which
25224 didn't handle RELAY_EARLY cells properly. Now that all supported
25225 versions can handle RELAY_EARLY cells, and now that we're enforcing
25226 the "no RELAY_EXTEND commands except in RELAY_EARLY cells" rule,
25227 remove this workaround. Addresses bug 4786.
25229 o Code simplifications and refactoring:
25230 - Use OpenSSL's built-in SSL_state_string_long() instead of our
25231 own homebrewed ssl_state_to_string() replacement. Patch from
25232 Emile Snyder. Fixes bug 4653.
25233 - Use macros to indicate OpenSSL versions, so we don't need to worry
25234 about accidental hexadecimal bit shifts.
25235 - Remove some workaround code for OpenSSL 0.9.6 (which is no longer
25237 - Convert more instances of tor_snprintf+tor_strdup into tor_asprintf.
25238 - Use the smartlist_add_asprintf() alias more consistently.
25239 - Use a TOR_INVALID_SOCKET macro when initializing a socket to an
25240 invalid value, rather than just -1.
25241 - Rename a handful of old identifiers, mostly related to crypto
25242 structures and crypto functions. By convention, our "create an
25243 object" functions are called "type_new()", our "free an object"
25244 functions are called "type_free()", and our types indicate that
25245 they are types only with a final "_t". But a handful of older
25246 types and functions broke these rules, with function names like
25247 "type_create" or "subsystem_op_type", or with type names like
25251 Changes in version 0.2.3.10-alpha - 2011-12-16
25252 Tor 0.2.3.10-alpha fixes a critical heap-overflow security issue in
25253 Tor's buffers code. Absolutely everybody should upgrade.
25255 The bug relied on an incorrect calculation when making data continuous
25256 in one of our IO buffers, if the first chunk of the buffer was
25257 misaligned by just the wrong amount. The miscalculation would allow an
25258 attacker to overflow a piece of heap-allocated memory. To mount this
25259 attack, the attacker would need to either open a SOCKS connection to
25260 Tor's SocksPort (usually restricted to localhost), or target a Tor
25261 instance configured to make its connections through a SOCKS proxy
25262 (which Tor does not do by default).
25264 Good security practice requires that all heap-overflow bugs should be
25265 presumed to be exploitable until proven otherwise, so we are treating
25266 this as a potential code execution attack. Please upgrade immediately!
25267 This bug does not affect bufferevents-based builds of Tor. Special
25268 thanks to "Vektor" for reporting this issue to us!
25270 This release also contains a few minor bugfixes for issues discovered
25274 - Fix a heap overflow bug that could occur when trying to pull
25275 data into the first chunk of a buffer, when that chunk had
25276 already had some data drained from it. Fixes CVE-2011-2778;
25277 bugfix on 0.2.0.16-alpha. Reported by "Vektor".
25280 - If we can't attach streams to a rendezvous circuit when we
25281 finish connecting to a hidden service, clear the rendezvous
25282 circuit's stream-isolation state and try to attach streams
25283 again. Previously, we cleared rendezvous circuits' isolation
25284 state either too early (if they were freshly built) or not at all
25285 (if they had been built earlier and were cannibalized). Bugfix on
25286 0.2.3.3-alpha; fixes bug 4655.
25287 - Fix compilation of the libnatpmp helper on non-Windows. Bugfix on
25288 0.2.3.9-alpha; fixes bug 4691. Reported by Anthony G. Basile.
25289 - Fix an assertion failure when a relay with accounting enabled
25290 starts up while dormant. Fixes bug 4702; bugfix on 0.2.3.9-alpha.
25293 - Update to the December 6 2011 Maxmind GeoLite Country database.
25296 Changes in version 0.2.2.35 - 2011-12-16
25297 Tor 0.2.2.35 fixes a critical heap-overflow security issue in Tor's
25298 buffers code. Absolutely everybody should upgrade.
25300 The bug relied on an incorrect calculation when making data continuous
25301 in one of our IO buffers, if the first chunk of the buffer was
25302 misaligned by just the wrong amount. The miscalculation would allow an
25303 attacker to overflow a piece of heap-allocated memory. To mount this
25304 attack, the attacker would need to either open a SOCKS connection to
25305 Tor's SocksPort (usually restricted to localhost), or target a Tor
25306 instance configured to make its connections through a SOCKS proxy
25307 (which Tor does not do by default).
25309 Good security practice requires that all heap-overflow bugs should be
25310 presumed to be exploitable until proven otherwise, so we are treating
25311 this as a potential code execution attack. Please upgrade immediately!
25312 This bug does not affect bufferevents-based builds of Tor. Special
25313 thanks to "Vektor" for reporting this issue to us!
25315 Tor 0.2.2.35 also fixes several bugs in previous versions, including
25316 crash bugs for unusual configurations, and a long-term bug that
25317 would prevent Tor from starting on Windows machines with draconian
25320 With this release, we remind everyone that 0.2.0.x has reached its
25321 formal end-of-life. Those Tor versions have many known flaws, and
25322 nobody should be using them. You should upgrade -- ideally to the
25323 0.2.2.x series. If you're using a Linux or BSD and its packages are
25324 obsolete, stop using those packages and upgrade anyway.
25326 The Tor 0.2.1.x series is also approaching its end-of-life: it will no
25327 longer receive support after some time in early 2012.
25330 - Fix a heap overflow bug that could occur when trying to pull
25331 data into the first chunk of a buffer, when that chunk had
25332 already had some data drained from it. Fixes CVE-2011-2778;
25333 bugfix on 0.2.0.16-alpha. Reported by "Vektor".
25334 - Initialize Libevent with the EVENT_BASE_FLAG_NOLOCK flag enabled, so
25335 that it doesn't attempt to allocate a socketpair. This could cause
25336 some problems on Windows systems with overzealous firewalls. Fix for
25337 bug 4457; workaround for Libevent versions 2.0.1-alpha through
25339 - If we mark an OR connection for close based on a cell we process,
25340 don't process any further cells on it. We already avoid further
25341 reads on marked-for-close connections, but now we also discard the
25342 cells we'd already read. Fixes bug 4299; bugfix on 0.2.0.10-alpha,
25343 which was the first version where we might mark a connection for
25344 close based on processing a cell on it.
25345 - Correctly sanity-check that we don't underflow on a memory
25346 allocation (and then assert) for hidden service introduction
25347 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
25348 bugfix on 0.2.1.5-alpha.
25349 - Fix a memory leak when we check whether a hidden service
25350 descriptor has any usable introduction points left. Fixes bug
25351 4424. Bugfix on 0.2.2.25-alpha.
25352 - Don't crash when we're running as a relay and don't have a GeoIP
25353 file. Bugfix on 0.2.2.34; fixes bug 4340. This backports a fix
25354 we've had in the 0.2.3.x branch already.
25355 - When running as a client, do not print a misleading (and plain
25356 wrong) log message that we're collecting "directory request"
25357 statistics: clients don't collect statistics. Also don't create a
25358 useless (because empty) stats file in the stats/ directory. Fixes
25359 bug 4353; bugfix on 0.2.2.34.
25362 - Detect failure to initialize Libevent. This fix provides better
25363 detection for future instances of bug 4457.
25364 - Avoid frequent calls to the fairly expensive cull_wedged_cpuworkers
25365 function. This was eating up hideously large amounts of time on some
25366 busy servers. Fixes bug 4518; bugfix on 0.0.9.8.
25367 - Resolve an integer overflow bug in smartlist_ensure_capacity().
25368 Fixes bug 4230; bugfix on Tor 0.1.0.1-rc. Based on a patch by
25370 - Don't warn about unused log_mutex in log.c when building with
25371 --disable-threads using a recent GCC. Fixes bug 4437; bugfix on
25372 0.1.0.6-rc which introduced --disable-threads.
25373 - When configuring, starting, or stopping an NT service, stop
25374 immediately after the service configuration attempt has succeeded
25375 or failed. Fixes bug 3963; bugfix on 0.2.0.7-alpha.
25376 - When sending a NETINFO cell, include the original address
25377 received for the other side, not its canonical address. Found
25378 by "troll_un"; fixes bug 4349; bugfix on 0.2.0.10-alpha.
25379 - Fix a typo in a hibernation-related log message. Fixes bug 4331;
25380 bugfix on 0.2.2.23-alpha; found by "tmpname0901".
25381 - Fix a memory leak in launch_direct_bridge_descriptor_fetch() that
25382 occurred when a client tried to fetch a descriptor for a bridge
25383 in ExcludeNodes. Fixes bug 4383; bugfix on 0.2.2.25-alpha.
25384 - Backport fixes for a pair of compilation warnings on Windows.
25385 Fixes bug 4521; bugfix on 0.2.2.28-beta and on 0.2.2.29-beta.
25386 - If we had ever tried to call tor_addr_to_str on an address of
25387 unknown type, we would have done a strdup on an uninitialized
25388 buffer. Now we won't. Fixes bug 4529; bugfix on 0.2.1.3-alpha.
25389 Reported by "troll_un".
25390 - Correctly detect and handle transient lookup failures from
25391 tor_addr_lookup. Fixes bug 4530; bugfix on 0.2.1.5-alpha.
25392 Reported by "troll_un".
25393 - Fix null-pointer access that could occur if TLS allocation failed.
25394 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un".
25395 - Use tor_socket_t type for listener argument to accept(). Fixes bug
25396 4535; bugfix on 0.2.2.28-beta. Found by "troll_un".
25399 - Add two new config options for directory authorities:
25400 AuthDirFastGuarantee sets a bandwidth threshold for guaranteeing the
25401 Fast flag, and AuthDirGuardBWGuarantee sets a bandwidth threshold
25402 that is always sufficient to satisfy the bandwidth requirement for
25403 the Guard flag. Now it will be easier for researchers to simulate
25404 Tor networks with different values. Resolves ticket 4484.
25405 - When Tor ignores a hidden service specified in its configuration,
25406 include the hidden service's directory in the warning message.
25407 Previously, we would only tell the user that some hidden service
25408 was ignored. Bugfix on 0.0.6; fixes bug 4426.
25409 - Update to the December 6 2011 Maxmind GeoLite Country database.
25411 o Packaging changes:
25412 - Make it easier to automate expert package builds on Windows,
25413 by removing an absolute path from makensis.exe command.
25416 Changes in version 0.2.1.32 - 2011-12-16
25417 Tor 0.2.1.32 backports important security and privacy fixes for
25418 oldstable. This release is intended only for package maintainers and
25419 others who cannot use the 0.2.2 stable series. All others should be
25420 using Tor 0.2.2.x or newer.
25422 The Tor 0.2.1.x series will reach formal end-of-life some time in
25423 early 2012; we will stop releasing patches for it then.
25425 o Major bugfixes (also included in 0.2.2.x):
25426 - Correctly sanity-check that we don't underflow on a memory
25427 allocation (and then assert) for hidden service introduction
25428 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
25429 bugfix on 0.2.1.5-alpha.
25430 - Fix a heap overflow bug that could occur when trying to pull
25431 data into the first chunk of a buffer, when that chunk had
25432 already had some data drained from it. Fixes CVE-2011-2778;
25433 bugfix on 0.2.0.16-alpha. Reported by "Vektor".
25436 - Update to the December 6 2011 Maxmind GeoLite Country database.
25439 Changes in version 0.2.3.9-alpha - 2011-12-08
25440 Tor 0.2.3.9-alpha introduces initial IPv6 support for bridges, adds
25441 a "DisableNetwork" security feature that bundles can use to avoid
25442 touching the network until bridges are configured, moves forward on
25443 the pluggable transport design, fixes a flaw in the hidden service
25444 design that unnecessarily prevented clients with wrong clocks from
25445 reaching hidden services, and fixes a wide variety of other issues.
25448 - Clients can now connect to private bridges over IPv6. Bridges
25449 still need at least one IPv4 address in order to connect to
25450 other relays. Note that we don't yet handle the case where the
25451 user has two bridge lines for the same bridge (one IPv4, one
25452 IPv6). Implements parts of proposal 186.
25453 - New "DisableNetwork" config option to prevent Tor from launching any
25454 connections or accepting any connections except on a control port.
25455 Bundles and controllers can set this option before letting Tor talk
25456 to the rest of the network, for example to prevent any connections
25457 to a non-bridge address. Packages like Orbot can also use this
25458 option to instruct Tor to save power when the network is off.
25459 - Clients and bridges can now be configured to use a separate
25460 "transport" proxy. This approach makes the censorship arms race
25461 easier by allowing bridges to use protocol obfuscation plugins. It
25462 implements the "managed proxy" part of proposal 180 (ticket 3472).
25463 - When using OpenSSL 1.0.0 or later, use OpenSSL's counter mode
25464 implementation. It makes AES_CTR about 7% faster than our old one
25465 (which was about 10% faster than the one OpenSSL used to provide).
25466 Resolves ticket 4526.
25467 - Add a "tor2web mode" for clients that want to connect to hidden
25468 services non-anonymously (and possibly more quickly). As a safety
25469 measure to try to keep users from turning this on without knowing
25470 what they are doing, tor2web mode must be explicitly enabled at
25471 compile time, and a copy of Tor compiled to run in tor2web mode
25472 cannot be used as a normal Tor client. Implements feature 2553.
25473 - Add experimental support for running on Windows with IOCP and no
25474 kernel-space socket buffers. This feature is controlled by a new
25475 "UserspaceIOCPBuffers" config option (off by default), which has
25476 no effect unless Tor has been built with support for bufferevents,
25477 is running on Windows, and has enabled IOCP. This may, in the long
25478 run, help solve or mitigate bug 98.
25479 - Use a more secure consensus parameter voting algorithm. Now at
25480 least three directory authorities or a majority of them must
25481 vote on a given parameter before it will be included in the
25482 consensus. Implements proposal 178.
25485 - Hidden services now ignore the timestamps on INTRODUCE2 cells.
25486 They used to check that the timestamp was within 30 minutes
25487 of their system clock, so they could cap the size of their
25488 replay-detection cache, but that approach unnecessarily refused
25489 service to clients with wrong clocks. Bugfix on 0.2.1.6-alpha, when
25490 the v3 intro-point protocol (the first one which sent a timestamp
25491 field in the INTRODUCE2 cell) was introduced; fixes bug 3460.
25492 - Only use the EVP interface when AES acceleration is enabled,
25493 to avoid a 5-7% performance regression. Resolves issue 4525;
25494 bugfix on 0.2.3.8-alpha.
25496 o Privacy/anonymity features (bridge detection):
25497 - Make bridge SSL certificates a bit more stealthy by using random
25498 serial numbers, in the same fashion as OpenSSL when generating
25499 self-signed certificates. Implements ticket 4584.
25500 - Introduce a new config option "DynamicDHGroups", enabled by
25501 default, which provides each bridge with a unique prime DH modulus
25502 to be used during SSL handshakes. This option attempts to help
25503 against censors who might use the Apache DH modulus as a static
25504 identifier for bridges. Addresses ticket 4548.
25506 o Minor features (new/different config options):
25507 - New configuration option "DisableDebuggerAttachment" (on by default)
25508 to prevent basic debugging attachment attempts by other processes.
25509 Supports Mac OS X and Gnu/Linux. Resolves ticket 3313.
25510 - Allow MapAddress directives to specify matches against super-domains,
25511 as in "MapAddress *.torproject.org *.torproject.org.torserver.exit".
25512 Implements issue 933.
25513 - Slightly change behavior of "list" options (that is, config
25514 options that can appear more than once) when they appear both in
25515 torrc and on the command line. Previously, the command-line options
25516 would be appended to the ones from torrc. Now, the command-line
25517 options override the torrc options entirely. This new behavior
25518 allows the user to override list options (like exit policies and
25519 ports to listen on) from the command line, rather than simply
25520 appending to the list.
25521 - You can get the old (appending) command-line behavior for "list"
25522 options by prefixing the option name with a "+".
25523 - You can remove all the values for a "list" option from the command
25524 line without adding any new ones by prefixing the option name
25526 - Add experimental support for a "defaults" torrc file to be parsed
25527 before the regular torrc. Torrc options override the defaults file's
25528 options in the same way that the command line overrides the torrc.
25529 The SAVECONF controller command saves only those options which
25530 differ between the current configuration and the defaults file. HUP
25531 reloads both files. (Note: This is an experimental feature; its
25532 behavior will probably be refined in future 0.2.3.x-alpha versions
25533 to better meet packagers' needs.) Implements task 4552.
25536 - Try to make the introductory warning message that Tor prints on
25537 startup more useful for actually finding help and information.
25538 Resolves ticket 2474.
25539 - Running "make version" now displays the version of Tor that
25540 we're about to build. Idea from katmagic; resolves issue 4400.
25541 - Expire old or over-used hidden service introduction points.
25542 Required by fix for bug 3460.
25543 - Move the replay-detection cache for the RSA-encrypted parts of
25544 INTRODUCE2 cells to the introduction point data structures.
25545 Previously, we would use one replay-detection cache per hidden
25546 service. Required by fix for bug 3460.
25547 - Reduce the lifetime of elements of hidden services' Diffie-Hellman
25548 public key replay-detection cache from 60 minutes to 5 minutes. This
25549 replay-detection cache is now used only to detect multiple
25550 INTRODUCE2 cells specifying the same rendezvous point, so we can
25551 avoid launching multiple simultaneous attempts to connect to it.
25553 o Minor bugfixes (on Tor 0.2.2.x and earlier):
25554 - Resolve an integer overflow bug in smartlist_ensure_capacity().
25555 Fixes bug 4230; bugfix on Tor 0.1.0.1-rc. Based on a patch by
25557 - Fix a minor formatting issue in one of tor-gencert's error messages.
25559 - Prevent a false positive from the check-spaces script, by disabling
25560 the "whitespace between function name and (" check for functions
25562 - Fix a log message suggesting that people contact a non-existent
25563 email address. Fixes bug 3448.
25564 - Fix null-pointer access that could occur if TLS allocation failed.
25565 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un".
25566 - Report a real bootstrap problem to the controller on router
25567 identity mismatch. Previously we just said "foo", which probably
25568 made a lot of sense at the time. Fixes bug 4169; bugfix on
25570 - If we had ever tried to call tor_addr_to_str() on an address of
25571 unknown type, we would have done a strdup() on an uninitialized
25572 buffer. Now we won't. Fixes bug 4529; bugfix on 0.2.1.3-alpha.
25573 Reported by "troll_un".
25574 - Correctly detect and handle transient lookup failures from
25575 tor_addr_lookup(). Fixes bug 4530; bugfix on 0.2.1.5-alpha.
25576 Reported by "troll_un".
25577 - Use tor_socket_t type for listener argument to accept(). Fixes bug
25578 4535; bugfix on 0.2.2.28-beta. Found by "troll_un".
25579 - Initialize conn->addr to a valid state in spawn_cpuworker(). Fixes
25580 bug 4532; found by "troll_un".
25582 o Minor bugfixes (on Tor 0.2.3.x):
25583 - Fix a compile warning in tor_inet_pton(). Bugfix on 0.2.3.8-alpha;
25585 - Don't send two ESTABLISH_RENDEZVOUS cells when opening a new
25586 circuit for use as a hidden service client's rendezvous point.
25587 Fixes bugs 4641 and 4171; bugfix on 0.2.3.3-alpha. Diagnosed
25588 with help from wanoskarnet.
25589 - Restore behavior of overriding SocksPort, ORPort, and similar
25590 options from the command line. Bugfix on 0.2.3.3-alpha.
25593 - Properly handle the case where the build-tree is not the same
25594 as the source tree when generating src/common/common_sha1.i,
25595 src/or/micro-revision.i, and src/or/or_sha1.i. Fixes bug 3953;
25596 bugfix on 0.2.0.1-alpha.
25598 o Code simplifications, cleanups, and refactorings:
25599 - Remove the pure attribute from all functions that used it
25600 previously. In many cases we assigned it incorrectly, because the
25601 functions might assert or call impure functions, and we don't have
25602 evidence that keeping the pure attribute is worthwhile. Implements
25603 changes suggested in ticket 4421.
25604 - Remove some dead code spotted by coverity. Fixes cid 432.
25605 Bugfix on 0.2.3.1-alpha, closes bug 4637.
25608 Changes in version 0.2.3.8-alpha - 2011-11-22
25609 Tor 0.2.3.8-alpha fixes some crash and assert bugs, including a
25610 socketpair-related bug that has been bothering Windows users. It adds
25611 support to serve microdescriptors to controllers, so Vidalia's network
25612 map can resume listing relays (once Vidalia implements its side),
25613 and adds better support for hardware AES acceleration. Finally, it
25614 starts the process of adjusting the bandwidth cutoff for getting the
25615 "Fast" flag from 20KB to (currently) 32KB -- preliminary results show
25616 that tiny relays harm performance more than they help network capacity.
25619 - Initialize Libevent with the EVENT_BASE_FLAG_NOLOCK flag enabled, so
25620 that it doesn't attempt to allocate a socketpair. This could cause
25621 some problems on Windows systems with overzealous firewalls. Fix for
25622 bug 4457; workaround for Libevent versions 2.0.1-alpha through
25624 - Correctly sanity-check that we don't underflow on a memory
25625 allocation (and then assert) for hidden service introduction
25626 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
25627 bugfix on 0.2.1.5-alpha.
25628 - Remove the artificially low cutoff of 20KB to guarantee the Fast
25629 flag. In the past few years the average relay speed has picked
25630 up, and while the "top 7/8 of the network get the Fast flag" and
25631 "all relays with 20KB or more of capacity get the Fast flag" rules
25632 used to have the same result, now the top 7/8 of the network has
25633 a capacity more like 32KB. Bugfix on 0.2.1.14-rc. Fixes bug 4489.
25634 - Fix a rare assertion failure when checking whether a v0 hidden
25635 service descriptor has any usable introduction points left, and
25636 we don't have enough information to build a circuit to the first
25637 intro point named in the descriptor. The HS client code in
25638 0.2.3.x no longer uses v0 HS descriptors, but this assertion can
25639 trigger on (and crash) v0 HS authorities. Fixes bug 4411.
25640 Bugfix on 0.2.3.1-alpha; diagnosed by frosty_un.
25641 - Make bridge authorities not crash when they are asked for their own
25642 descriptor. Bugfix on 0.2.3.7-alpha, reported by Lucky Green.
25643 - When running as a client, do not print a misleading (and plain
25644 wrong) log message that we're collecting "directory request"
25645 statistics: clients don't collect statistics. Also don't create a
25646 useless (because empty) stats file in the stats/ directory. Fixes
25647 bug 4353; bugfix on 0.2.2.34 and 0.2.3.7-alpha.
25650 - Allow Tor controllers like Vidalia to obtain the microdescriptor
25651 for a relay by identity digest or nickname. Previously,
25652 microdescriptors were only available by their own digests, so a
25653 controller would have to ask for and parse the whole microdescriptor
25654 consensus in order to look up a single relay's microdesc. Fixes
25655 bug 3832; bugfix on 0.2.3.1-alpha.
25656 - Use OpenSSL's EVP interface for AES encryption, so that all AES
25657 operations can use hardware acceleration (if present). Resolves
25660 o Minor bugfixes (on 0.2.2.x and earlier):
25661 - Detect failure to initialize Libevent. This fix provides better
25662 detection for future instances of bug 4457.
25663 - Avoid frequent calls to the fairly expensive cull_wedged_cpuworkers
25664 function. This was eating up hideously large amounts of time on some
25665 busy servers. Fixes bug 4518; bugfix on 0.0.9.8.
25666 - Don't warn about unused log_mutex in log.c when building with
25667 --disable-threads using a recent GCC. Fixes bug 4437; bugfix on
25668 0.1.0.6-rc which introduced --disable-threads.
25669 - Allow manual 'authenticate' commands to the controller interface
25670 from netcat (nc) as well as telnet. We were rejecting them because
25671 they didn't come with the expected whitespace at the end of the
25672 command. Bugfix on 0.1.1.1-alpha; fixes bug 2893.
25673 - Fix some (not actually triggerable) buffer size checks in usage of
25674 tor_inet_ntop. Fixes bug 4434; bugfix on Tor 0.2.0.1-alpha. Patch
25676 - Fix parsing of some corner-cases with tor_inet_pton(). Fixes
25677 bug 4515; bugfix on 0.2.0.1-alpha; fix by Anders Sundman.
25678 - When configuring, starting, or stopping an NT service, stop
25679 immediately after the service configuration attempt has succeeded
25680 or failed. Fixes bug 3963; bugfix on 0.2.0.7-alpha.
25681 - When sending a NETINFO cell, include the original address
25682 received for the other side, not its canonical address. Found
25683 by "troll_un"; fixes bug 4349; bugfix on 0.2.0.10-alpha.
25684 - Rename the bench_{aes,dmap} functions to test_*, so that tinytest
25685 can pick them up when the tests aren't disabled. Bugfix on
25686 0.2.2.4-alpha which introduced tinytest.
25687 - Fix a memory leak when we check whether a hidden service
25688 descriptor has any usable introduction points left. Fixes bug
25689 4424. Bugfix on 0.2.2.25-alpha.
25690 - Fix a memory leak in launch_direct_bridge_descriptor_fetch() that
25691 occurred when a client tried to fetch a descriptor for a bridge
25692 in ExcludeNodes. Fixes bug 4383; bugfix on 0.2.2.25-alpha.
25694 o Minor bugfixes (on 0.2.3.x):
25695 - Make util unit tests build correctly with MSVC. Bugfix on
25696 0.2.3.3-alpha. Patch by Gisle Vanem.
25697 - Successfully detect AUTH_CHALLENGE cells with no recognized
25698 authentication type listed. Fixes bug 4367; bugfix on 0.2.3.6-alpha.
25699 Found by frosty_un.
25700 - If a relay receives an AUTH_CHALLENGE cell it can't answer,
25701 it should still send a NETINFO cell to allow the connection to
25702 become open. Fixes bug 4368; fix on 0.2.3.6-alpha; bug found by
25704 - Log less loudly when we get an invalid authentication certificate
25705 from a source other than a directory authority: it's not unusual
25706 to see invalid certs because of clock skew. Fixes bug 4370; bugfix
25708 - Tolerate servers with more clock skew in their authentication
25709 certificates than previously. Fixes bug 4371; bugfix on
25711 - Fix a couple of compile warnings on Windows. Fixes bug 4469; bugfix
25712 on 0.2.3.4-alpha and 0.2.3.6-alpha.
25715 - Add two new config options for directory authorities:
25716 AuthDirFastGuarantee sets a bandwidth threshold for guaranteeing the
25717 Fast flag, and AuthDirGuardBWGuarantee sets a bandwidth threshold
25718 that is always sufficient to satisfy the bandwidth requirement for
25719 the Guard flag. Now it will be easier for researchers to simulate
25720 Tor networks with different values. Resolves ticket 4484.
25721 - When Tor ignores a hidden service specified in its configuration,
25722 include the hidden service's directory in the warning message.
25723 Previously, we would only tell the user that some hidden service
25724 was ignored. Bugfix on 0.0.6; fixes bug 4426.
25725 - When we fail to initialize Libevent, retry with IOCP disabled so we
25726 don't need to turn on multi-threading support in Libevent, which in
25727 turn requires a working socketpair(). This is a workaround for bug
25728 4457, which affects Libevent versions from 2.0.1-alpha through
25730 - Detect when we try to build on a platform that doesn't define
25731 AF_UNSPEC to 0. We don't work there, so refuse to compile.
25732 - Update to the November 1 2011 Maxmind GeoLite Country database.
25734 o Packaging changes:
25735 - Make it easier to automate expert package builds on Windows,
25736 by removing an absolute path from makensis.exe command.
25738 o Code simplifications and refactoring:
25739 - Remove some redundant #include directives throughout the code.
25740 Patch from Andrea Gelmini.
25741 - Unconditionally use OpenSSL's AES implementation instead of our
25742 old built-in one. OpenSSL's AES has been better for a while, and
25743 relatively few servers should still be on any version of OpenSSL
25744 that doesn't have good optimized assembly AES.
25745 - Use the name "CERTS" consistently to refer to the new cell type;
25746 we were calling it CERT in some places and CERTS in others.
25749 - Numerous new unit tests for functions in util.c and address.c by
25751 - The long-disabled benchmark tests are now split into their own
25752 ./src/test/bench binary.
25753 - The benchmark tests can now use more accurate timers than
25754 gettimeofday() when such timers are available.
25757 Changes in version 0.2.3.7-alpha - 2011-10-30
25758 Tor 0.2.3.7-alpha fixes a crash bug in 0.2.3.6-alpha introduced by
25759 the new v3 handshake. It also resolves yet another bridge address
25763 - If we mark an OR connection for close based on a cell we process,
25764 don't process any further cells on it. We already avoid further
25765 reads on marked-for-close connections, but now we also discard the
25766 cells we'd already read. Fixes bug 4299; bugfix on 0.2.0.10-alpha,
25767 which was the first version where we might mark a connection for
25768 close based on processing a cell on it.
25769 - Fix a double-free bug that would occur when we received an invalid
25770 certificate in a CERT cell in the new v3 handshake. Fixes bug 4343;
25771 bugfix on 0.2.3.6-alpha.
25772 - Bridges no longer include their address in NETINFO cells on outgoing
25773 OR connections, to allow them to blend in better with clients.
25774 Removes another avenue for enumerating bridges. Reported by
25775 "troll_un". Fixes bug 4348; bugfix on 0.2.0.10-alpha, when NETINFO
25776 cells were introduced.
25779 - Fixed a typo in a hibernation-related log message. Fixes bug 4331;
25780 bugfix on 0.2.2.23-alpha; found by "tmpname0901".
25783 Changes in version 0.2.3.6-alpha - 2011-10-26
25784 Tor 0.2.3.6-alpha includes the fix from 0.2.2.34 for a critical
25785 anonymity vulnerability where an attacker can deanonymize Tor
25786 users. Everybody should upgrade.
25788 This release also features support for a new v3 connection handshake
25789 protocol, and fixes to make hidden service connections more robust.
25792 - Implement a new handshake protocol (v3) for authenticating Tors to
25793 each other over TLS. It should be more resistant to fingerprinting
25794 than previous protocols, and should require less TLS hacking for
25795 future Tor implementations. Implements proposal 176.
25796 - Allow variable-length padding cells to disguise the length of
25797 Tor's TLS records. Implements part of proposal 184.
25799 o Privacy/anonymity fixes (clients):
25800 - Clients and bridges no longer send TLS certificate chains on
25801 outgoing OR connections. Previously, each client or bridge would
25802 use the same cert chain for all outgoing OR connections until
25803 its IP address changes, which allowed any relay that the client
25804 or bridge contacted to determine which entry guards it is using.
25805 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
25806 - If a relay receives a CREATE_FAST cell on a TLS connection, it
25807 no longer considers that connection as suitable for satisfying a
25808 circuit EXTEND request. Now relays can protect clients from the
25809 CVE-2011-2768 issue even if the clients haven't upgraded yet.
25810 - Directory authorities no longer assign the Guard flag to relays
25811 that haven't upgraded to the above "refuse EXTEND requests
25812 to client connections" fix. Now directory authorities can
25813 protect clients from the CVE-2011-2768 issue even if neither
25814 the clients nor the relays have upgraded yet. There's a new
25815 "GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays" config option
25816 to let us transition smoothly, else tomorrow there would be no
25819 o Major bugfixes (hidden services):
25820 - Improve hidden service robustness: when an attempt to connect to
25821 a hidden service ends, be willing to refetch its hidden service
25822 descriptors from each of the HSDir relays responsible for them
25823 immediately. Previously, we would not consider refetching the
25824 service's descriptors from each HSDir for 15 minutes after the last
25825 fetch, which was inconvenient if the hidden service was not running
25826 during the first attempt. Bugfix on 0.2.0.18-alpha; fixes bug 3335.
25827 - When one of a hidden service's introduction points appears to be
25828 unreachable, stop trying it. Previously, we would keep trying
25829 to build circuits to the introduction point until we lost the
25830 descriptor, usually because the user gave up and restarted Tor.
25831 Partly fixes bug 3825.
25832 - Don't launch a useless circuit after failing to use one of a
25833 hidden service's introduction points. Previously, we would
25834 launch a new introduction circuit, but not set the hidden service
25835 which that circuit was intended to connect to, so it would never
25836 actually be used. A different piece of code would then create a
25837 new introduction circuit correctly. Bug reported by katmagic and
25838 found by Sebastian Hahn. Bugfix on 0.2.1.13-alpha; fixes bug 4212.
25840 o Major bugfixes (other):
25841 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
25842 that they initiated. Relays could distinguish incoming bridge
25843 connections from client connections, creating another avenue for
25844 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
25845 Found by "frosty_un".
25846 - Don't update the AccountingSoftLimitHitAt state file entry whenever
25847 tor gets started. This prevents a wrong average bandwidth
25848 estimate, which would cause relays to always start a new accounting
25849 interval at the earliest possible moment. Fixes bug 2003; bugfix
25850 on 0.2.2.7-alpha. Reported by BryonEldridge, who also helped
25851 immensely in tracking this bug down.
25852 - Fix a crash bug when changing node restrictions while a DNS lookup
25853 is in-progress. Fixes bug 4259; bugfix on 0.2.2.25-alpha. Bugfix
25856 o Minor bugfixes (on 0.2.2.x and earlier):
25857 - When a hidden service turns an extra service-side introduction
25858 circuit into a general-purpose circuit, free the rend_data and
25859 intro_key fields first, so we won't leak memory if the circuit
25860 is cannibalized for use as another service-side introduction
25861 circuit. Bugfix on 0.2.1.7-alpha; fixes bug 4251.
25862 - Rephrase the log message emitted if the TestSocks check is
25863 successful. Patch from Fabian Keil; fixes bug 4094.
25864 - Bridges now skip DNS self-tests, to act a little more stealthily.
25865 Fixes bug 4201; bugfix on 0.2.0.3-alpha, which first introduced
25866 bridges. Patch by "warms0x".
25867 - Remove a confusing dollar sign from the example fingerprint in the
25868 man page, and also make the example fingerprint a valid one. Fixes
25869 bug 4309; bugfix on 0.2.1.3-alpha.
25870 - Fix internal bug-checking logic that was supposed to catch
25871 failures in digest generation so that it will fail more robustly
25872 if we ask for a nonexistent algorithm. Found by Coverity Scan.
25873 Bugfix on 0.2.2.1-alpha; fixes Coverity CID 479.
25874 - Report any failure in init_keys() calls launched because our
25875 IP address has changed. Spotted by Coverity Scan. Bugfix on
25876 0.1.1.4-alpha; fixes CID 484.
25878 o Minor bugfixes (on 0.2.3.x):
25879 - Fix a bug in configure.in that kept it from building a configure
25880 script with autoconf versions earlier than 2.61. Fixes bug 2430;
25881 bugfix on 0.2.3.1-alpha.
25882 - Don't warn users that they are exposing a client port to the
25883 Internet if they have specified an RFC1918 address. Previously,
25884 we would warn if the user had specified any non-loopback
25885 address. Bugfix on 0.2.3.3-alpha. Fixes bug 4018; reported by Tas.
25886 - Fix memory leaks in the failing cases of the new SocksPort and
25887 ControlPort code. Found by Coverity Scan. Bugfix on 0.2.3.3-alpha;
25888 fixes coverity CIDs 485, 486, and 487.
25891 - When a hidden service's introduction point times out, consider
25892 trying it again during the next attempt to connect to the
25893 HS. Previously, we would not try it again unless a newly fetched
25894 descriptor contained it. Required by fixes for bugs 1297 and 3825.
25895 - The next version of Windows will be called Windows 8, and it has
25896 a major version of 6, minor version of 2. Correctly identify that
25897 version instead of calling it "Very recent version". Resolves
25898 ticket 4153; reported by funkstar.
25899 - The Bridge Authority now writes statistics on how many bridge
25900 descriptors it gave out in total, and how many unique descriptors
25901 it gave out. It also lists how often the most and least commonly
25902 fetched descriptors were given out, as well as the median and
25903 25th/75th percentile. Implements tickets 4200 and 4294.
25904 - Update to the October 4 2011 Maxmind GeoLite Country database.
25906 o Code simplifications and refactoring:
25907 - Remove some old code to remember statistics about which descriptors
25908 we've served as a directory mirror. The feature wasn't used and
25909 is outdated now that microdescriptors are around.
25910 - Rename Tor functions that turn strings into addresses, so that
25911 "parse" indicates that no hostname resolution occurs, and
25912 "lookup" indicates that hostname resolution may occur. This
25913 should help prevent mistakes in the future. Fixes bug 3512.
25916 Changes in version 0.2.2.34 - 2011-10-26
25917 Tor 0.2.2.34 fixes a critical anonymity vulnerability where an attacker
25918 can deanonymize Tor users. Everybody should upgrade.
25920 The attack relies on four components: 1) Clients reuse their TLS cert
25921 when talking to different relays, so relays can recognize a user by
25922 the identity key in her cert. 2) An attacker who knows the client's
25923 identity key can probe each guard relay to see if that identity key
25924 is connected to that guard relay right now. 3) A variety of active
25925 attacks in the literature (starting from "Low-Cost Traffic Analysis
25926 of Tor" by Murdoch and Danezis in 2005) allow a malicious website to
25927 discover the guard relays that a Tor user visiting the website is using.
25928 4) Clients typically pick three guards at random, so the set of guards
25929 for a given user could well be a unique fingerprint for her. This
25930 release fixes components #1 and #2, which is enough to block the attack;
25931 the other two remain as open research problems. Special thanks to
25932 "frosty_un" for reporting the issue to us!
25934 Clients should upgrade so they are no longer recognizable by the TLS
25935 certs they present. Relays should upgrade so they no longer allow a
25936 remote attacker to probe them to test whether unpatched clients are
25937 currently connected to them.
25939 This release also fixes several vulnerabilities that allow an attacker
25940 to enumerate bridge relays. Some bridge enumeration attacks still
25941 remain; see for example proposal 188.
25943 o Privacy/anonymity fixes (clients):
25944 - Clients and bridges no longer send TLS certificate chains on
25945 outgoing OR connections. Previously, each client or bridge would
25946 use the same cert chain for all outgoing OR connections until
25947 its IP address changes, which allowed any relay that the client
25948 or bridge contacted to determine which entry guards it is using.
25949 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
25950 - If a relay receives a CREATE_FAST cell on a TLS connection, it
25951 no longer considers that connection as suitable for satisfying a
25952 circuit EXTEND request. Now relays can protect clients from the
25953 CVE-2011-2768 issue even if the clients haven't upgraded yet.
25954 - Directory authorities no longer assign the Guard flag to relays
25955 that haven't upgraded to the above "refuse EXTEND requests
25956 to client connections" fix. Now directory authorities can
25957 protect clients from the CVE-2011-2768 issue even if neither
25958 the clients nor the relays have upgraded yet. There's a new
25959 "GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays" config option
25960 to let us transition smoothly, else tomorrow there would be no
25963 o Privacy/anonymity fixes (bridge enumeration):
25964 - Bridge relays now do their directory fetches inside Tor TLS
25965 connections, like all the other clients do, rather than connecting
25966 directly to the DirPort like public relays do. Removes another
25967 avenue for enumerating bridges. Fixes bug 4115; bugfix on 0.2.0.35.
25968 - Bridges relays now build circuits for themselves in a more similar
25969 way to how clients build them. Removes another avenue for
25970 enumerating bridges. Fixes bug 4124; bugfix on 0.2.0.3-alpha,
25971 when bridges were introduced.
25972 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
25973 that they initiated. Relays could distinguish incoming bridge
25974 connections from client connections, creating another avenue for
25975 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
25976 Found by "frosty_un".
25979 - Fix a crash bug when changing node restrictions while a DNS lookup
25980 is in-progress. Fixes bug 4259; bugfix on 0.2.2.25-alpha. Bugfix
25982 - Don't launch a useless circuit after failing to use one of a
25983 hidden service's introduction points. Previously, we would
25984 launch a new introduction circuit, but not set the hidden service
25985 which that circuit was intended to connect to, so it would never
25986 actually be used. A different piece of code would then create a
25987 new introduction circuit correctly. Bug reported by katmagic and
25988 found by Sebastian Hahn. Bugfix on 0.2.1.13-alpha; fixes bug 4212.
25991 - Change an integer overflow check in the OpenBSD_Malloc code so
25992 that GCC is less likely to eliminate it as impossible. Patch
25993 from Mansour Moufid. Fixes bug 4059.
25994 - When a hidden service turns an extra service-side introduction
25995 circuit into a general-purpose circuit, free the rend_data and
25996 intro_key fields first, so we won't leak memory if the circuit
25997 is cannibalized for use as another service-side introduction
25998 circuit. Bugfix on 0.2.1.7-alpha; fixes bug 4251.
25999 - Bridges now skip DNS self-tests, to act a little more stealthily.
26000 Fixes bug 4201; bugfix on 0.2.0.3-alpha, which first introduced
26001 bridges. Patch by "warms0x".
26002 - Fix internal bug-checking logic that was supposed to catch
26003 failures in digest generation so that it will fail more robustly
26004 if we ask for a nonexistent algorithm. Found by Coverity Scan.
26005 Bugfix on 0.2.2.1-alpha; fixes Coverity CID 479.
26006 - Report any failure in init_keys() calls launched because our
26007 IP address has changed. Spotted by Coverity Scan. Bugfix on
26008 0.1.1.4-alpha; fixes CID 484.
26010 o Minor bugfixes (log messages and documentation):
26011 - Remove a confusing dollar sign from the example fingerprint in the
26012 man page, and also make the example fingerprint a valid one. Fixes
26013 bug 4309; bugfix on 0.2.1.3-alpha.
26014 - The next version of Windows will be called Windows 8, and it has
26015 a major version of 6, minor version of 2. Correctly identify that
26016 version instead of calling it "Very recent version". Resolves
26017 ticket 4153; reported by funkstar.
26018 - Downgrade log messages about circuit timeout calibration from
26019 "notice" to "info": they don't require or suggest any human
26020 intervention. Patch from Tom Lowenthal. Fixes bug 4063;
26021 bugfix on 0.2.2.14-alpha.
26024 - Turn on directory request statistics by default and include them in
26025 extra-info descriptors. Don't break if we have no GeoIP database.
26026 Backported from 0.2.3.1-alpha; implements ticket 3951.
26027 - Update to the October 4 2011 Maxmind GeoLite Country database.
26030 Changes in version 0.2.1.31 - 2011-10-26
26031 Tor 0.2.1.31 backports important security and privacy fixes for
26032 oldstable. This release is intended only for package maintainers and
26033 others who cannot use the 0.2.2 stable series. All others should be
26034 using Tor 0.2.2.x or newer.
26036 o Security fixes (also included in 0.2.2.x):
26037 - Replace all potentially sensitive memory comparison operations
26038 with versions whose runtime does not depend on the data being
26039 compared. This will help resist a class of attacks where an
26040 adversary can use variations in timing information to learn
26041 sensitive data. Fix for one case of bug 3122. (Safe memcmp
26042 implementation by Robert Ransom based partially on code by DJB.)
26043 - Fix an assert in parsing router descriptors containing IPv6
26044 addresses. This one took down the directory authorities when
26045 somebody tried some experimental code. Bugfix on 0.2.1.3-alpha.
26047 o Privacy/anonymity fixes (also included in 0.2.2.x):
26048 - Clients and bridges no longer send TLS certificate chains on
26049 outgoing OR connections. Previously, each client or bridge would
26050 use the same cert chain for all outgoing OR connections until
26051 its IP address changes, which allowed any relay that the client
26052 or bridge contacted to determine which entry guards it is using.
26053 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
26054 - If a relay receives a CREATE_FAST cell on a TLS connection, it
26055 no longer considers that connection as suitable for satisfying a
26056 circuit EXTEND request. Now relays can protect clients from the
26057 CVE-2011-2768 issue even if the clients haven't upgraded yet.
26058 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
26059 that they initiated. Relays could distinguish incoming bridge
26060 connections from client connections, creating another avenue for
26061 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
26062 Found by "frosty_un".
26063 - When receiving a hidden service descriptor, check that it is for
26064 the hidden service we wanted. Previously, Tor would store any
26065 hidden service descriptors that a directory gave it, whether it
26066 wanted them or not. This wouldn't have let an attacker impersonate
26067 a hidden service, but it did let directories pre-seed a client
26068 with descriptors that it didn't want. Bugfix on 0.0.6.
26069 - Avoid linkability based on cached hidden service descriptors: forget
26070 all hidden service descriptors cached as a client when processing a
26071 SIGNAL NEWNYM command. Fixes bug 3000; bugfix on 0.0.6.
26072 - Make the bridge directory authority refuse to answer directory
26073 requests for "all" descriptors. It used to include bridge
26074 descriptors in its answer, which was a major information leak.
26075 Found by "piebeer". Bugfix on 0.2.0.3-alpha.
26076 - Don't attach new streams to old rendezvous circuits after SIGNAL
26077 NEWNYM. Previously, we would keep using an existing rendezvous
26078 circuit if it remained open (i.e. if it were kept open by a
26079 long-lived stream, or if a new stream were attached to it before
26080 Tor could notice that it was old and no longer in use). Bugfix on
26081 0.1.1.15-rc; fixes bug 3375.
26083 o Minor bugfixes (also included in 0.2.2.x):
26084 - When we restart our relay, we might get a successful connection
26085 from the outside before we've started our reachability tests,
26086 triggering a warning: "ORPort found reachable, but I have no
26087 routerinfo yet. Failing to inform controller of success." This
26088 bug was harmless unless Tor is running under a controller
26089 like Vidalia, in which case the controller would never get a
26090 REACHABILITY_SUCCEEDED status event. Bugfix on 0.1.2.6-alpha;
26092 - Build correctly on OSX with zlib 1.2.4 and higher with all warnings
26093 enabled. Fixes bug 1526.
26094 - Remove undocumented option "-F" from tor-resolve: it hasn't done
26095 anything since 0.2.1.16-rc.
26096 - Avoid signed/unsigned comparisons by making SIZE_T_CEILING unsigned.
26097 None of the cases where we did this before were wrong, but by making
26098 this change we avoid warnings. Fixes bug 2475; bugfix on 0.2.1.28.
26099 - Fix a rare crash bug that could occur when a client was configured
26100 with a large number of bridges. Fixes bug 2629; bugfix on
26101 0.2.1.2-alpha. Bugfix by trac user "shitlei".
26102 - Correct the warning displayed when a rendezvous descriptor exceeds
26103 the maximum size. Fixes bug 2750; bugfix on 0.2.1.5-alpha. Found by
26105 - Fix an uncommon assertion failure when running with DNSPort under
26106 heavy load. Fixes bug 2933; bugfix on 0.2.0.1-alpha.
26107 - When warning about missing zlib development packages during compile,
26108 give the correct package names. Bugfix on 0.2.0.1-alpha.
26109 - Require that introduction point keys and onion keys have public
26110 exponent 65537. Bugfix on 0.2.0.10-alpha.
26111 - Do not crash when our configuration file becomes unreadable, for
26112 example due to a permissions change, between when we start up
26113 and when a controller calls SAVECONF. Fixes bug 3135; bugfix
26115 - Fix warnings from GCC 4.6's "-Wunused-but-set-variable" option.
26117 - Always NUL-terminate the sun_path field of a sockaddr_un before
26118 passing it to the kernel. (Not a security issue: kernels are
26119 smart enough to reject bad sockaddr_uns.) Found by Coverity;
26120 CID #428. Bugfix on Tor 0.2.0.3-alpha.
26121 - Don't stack-allocate the list of supplementary GIDs when we're
26122 about to log them. Stack-allocating NGROUPS_MAX gid_t elements
26123 could take up to 256K, which is way too much stack. Found by
26124 Coverity; CID #450. Bugfix on 0.2.1.7-alpha.
26126 o Minor bugfixes (only in 0.2.1.x):
26127 - Resume using micro-version numbers in 0.2.1.x: our Debian packages
26128 rely on them. Bugfix on 0.2.1.30.
26129 - Use git revisions instead of svn revisions when generating our
26130 micro-version numbers. Bugfix on 0.2.1.15-rc; fixes bug 2402.
26132 o Minor features (also included in 0.2.2.x):
26133 - Adjust the expiration time on our SSL session certificates to
26134 better match SSL certs seen in the wild. Resolves ticket 4014.
26135 - Allow nameservers with IPv6 address. Resolves bug 2574.
26136 - Update to the October 4 2011 Maxmind GeoLite Country database.
26139 Changes in version 0.2.3.5-alpha - 2011-09-28
26140 Tor 0.2.3.5-alpha fixes two bugs that make it possible to enumerate
26141 bridge relays; fixes an assertion error that many users started hitting
26142 today; and adds the ability to refill token buckets more often than
26143 once per second, allowing significant performance improvements.
26146 - Bridge relays now do their directory fetches inside Tor TLS
26147 connections, like all the other clients do, rather than connecting
26148 directly to the DirPort like public relays do. Removes another
26149 avenue for enumerating bridges. Fixes bug 4115; bugfix on 0.2.0.35.
26150 - Bridges relays now build circuits for themselves in a more similar
26151 way to how clients build them. Removes another avenue for
26152 enumerating bridges. Fixes bug 4124; bugfix on 0.2.0.3-alpha,
26153 when bridges were introduced.
26156 - Fix an "Assertion md->held_by_node == 1 failed" error that could
26157 occur when the same microdescriptor was referenced by two node_t
26158 objects at once. Fix for bug 4118; bugfix on Tor 0.2.3.1-alpha.
26160 o Major features (networking):
26161 - Add a new TokenBucketRefillInterval option to refill token buckets
26162 more frequently than once per second. This should improve network
26163 performance, alleviate queueing problems, and make traffic less
26164 bursty. Implements proposal 183; closes ticket 3630. Design by
26165 Florian Tschorsch and Björn Scheuermann; implementation by
26169 - Change an integer overflow check in the OpenBSD_Malloc code so
26170 that GCC is less likely to eliminate it as impossible. Patch
26171 from Mansour Moufid. Fixes bug 4059.
26173 o Minor bugfixes (usability):
26174 - Downgrade log messages about circuit timeout calibration from
26175 "notice" to "info": they don't require or suggest any human
26176 intervention. Patch from Tom Lowenthal. Fixes bug 4063;
26177 bugfix on 0.2.2.14-alpha.
26179 o Minor features (diagnostics):
26180 - When the system call to create a listener socket fails, log the
26181 error message explaining why. This may help diagnose bug 4027.
26184 Changes in version 0.2.3.4-alpha - 2011-09-13
26185 Tor 0.2.3.4-alpha includes the fixes from 0.2.2.33, including a slight
26186 tweak to Tor's TLS handshake that makes relays and bridges that run
26187 this new version reachable from Iran again. It also fixes a few new
26188 bugs in 0.2.3.x, and teaches relays to recognize when they're not
26189 listed in the network consensus and republish.
26191 o Major bugfixes (also part of 0.2.2.33):
26192 - Avoid an assertion failure when reloading a configuration with
26193 TrackExitHosts changes. Found and fixed by 'laruldan'. Fixes bug
26194 3923; bugfix on 0.2.2.25-alpha.
26196 o Minor features (security, also part of 0.2.2.33):
26197 - Check for replays of the public-key encrypted portion of an
26198 INTRODUCE1 cell, in addition to the current check for replays of
26199 the g^x value. This prevents a possible class of active attacks
26200 by an attacker who controls both an introduction point and a
26201 rendezvous point, and who uses the malleability of AES-CTR to
26202 alter the encrypted g^x portion of the INTRODUCE1 cell. We think
26203 that these attacks are infeasible (requiring the attacker to send
26204 on the order of zettabytes of altered cells in a short interval),
26205 but we'd rather block them off in case there are any classes of
26206 this attack that we missed. Reported by Willem Pinckaers.
26208 o Minor features (also part of 0.2.2.33):
26209 - Adjust the expiration time on our SSL session certificates to
26210 better match SSL certs seen in the wild. Resolves ticket 4014.
26211 - Change the default required uptime for a relay to be accepted as
26212 a HSDir (hidden service directory) from 24 hours to 25 hours.
26213 Improves on 0.2.0.10-alpha; resolves ticket 2649.
26214 - Add a VoteOnHidServDirectoriesV2 config option to allow directory
26215 authorities to abstain from voting on assignment of the HSDir
26216 consensus flag. Related to bug 2649.
26217 - Update to the September 6 2011 Maxmind GeoLite Country database.
26219 o Minor bugfixes (also part of 0.2.2.33):
26220 - Demote the 'replay detected' log message emitted when a hidden
26221 service receives the same Diffie-Hellman public key in two different
26222 INTRODUCE2 cells to info level. A normal Tor client can cause that
26223 log message during its normal operation. Bugfix on 0.2.1.6-alpha;
26224 fixes part of bug 2442.
26225 - Demote the 'INTRODUCE2 cell is too {old,new}' log message to info
26226 level. There is nothing that a hidden service's operator can do
26227 to fix its clients' clocks. Bugfix on 0.2.1.6-alpha; fixes part
26229 - Clarify a log message specifying the characters permitted in
26230 HiddenServiceAuthorizeClient client names. Previously, the log
26231 message said that "[A-Za-z0-9+-_]" were permitted; that could have
26232 given the impression that every ASCII character between "+" and "_"
26233 was permitted. Now we say "[A-Za-z0-9+_-]". Bugfix on 0.2.1.5-alpha.
26235 o Build fixes (also part of 0.2.2.33):
26236 - Clean up some code issues that prevented Tor from building on older
26237 BSDs. Fixes bug 3894; reported by "grarpamp".
26238 - Search for a platform-specific version of "ar" when cross-compiling.
26239 Should fix builds on iOS. Resolves bug 3909, found by Marco Bonetti.
26242 - Fix a bug where the SocksPort option (for example) would get
26243 ignored and replaced by the default if a SocksListenAddress
26244 option was set. Bugfix on 0.2.3.3-alpha; fixes bug 3936. Fix by
26248 - Relays now try regenerating and uploading their descriptor more
26249 frequently if they are not listed in the consensus, or if the
26250 version of their descriptor listed in the consensus is too
26251 old. This fix should prevent situations where a server declines
26252 to re-publish itself because it has done so too recently, even
26253 though the authorities decided not to list its recent-enough
26254 descriptor. Fix for bug 3327.
26257 - Relays now include a reason for regenerating their descriptors
26258 in an HTTP header when uploading to the authorities. This will
26259 make it easier to debug descriptor-upload issues in the future.
26260 - When starting as root and then changing our UID via the User
26261 control option, and we have a ControlSocket configured, make sure
26262 that the ControlSocket is owned by the same account that Tor will
26263 run under. Implements ticket 3421; fix by Jérémy Bobbio.
26266 - Abort if tor_vasprintf fails in connection_printf_to_buf (a
26267 utility function used in the control-port code). This shouldn't
26268 ever happen unless Tor is completely out of memory, but if it did
26269 happen and Tor somehow recovered from it, Tor could have sent a log
26270 message to a control port in the middle of a reply to a controller
26271 command. Fixes part of bug 3428; bugfix on 0.1.2.3-alpha.
26272 - Make 'FetchUselessDescriptors' cause all descriptor types and
26273 all consensus types (including microdescriptors) to get fetched.
26274 Fixes bug 3851; bugfix on 0.2.3.1-alpha.
26276 o Code refactoring:
26277 - Make a new "entry connection" struct as an internal subtype of "edge
26278 connection", to simplify the code and make exit connections smaller.
26281 Changes in version 0.2.2.33 - 2011-09-13
26282 Tor 0.2.2.33 fixes several bugs, and includes a slight tweak to Tor's
26283 TLS handshake that makes relays and bridges that run this new version
26284 reachable from Iran again.
26287 - Avoid an assertion failure when reloading a configuration with
26288 TrackExitHosts changes. Found and fixed by 'laruldan'. Fixes bug
26289 3923; bugfix on 0.2.2.25-alpha.
26291 o Minor features (security):
26292 - Check for replays of the public-key encrypted portion of an
26293 INTRODUCE1 cell, in addition to the current check for replays of
26294 the g^x value. This prevents a possible class of active attacks
26295 by an attacker who controls both an introduction point and a
26296 rendezvous point, and who uses the malleability of AES-CTR to
26297 alter the encrypted g^x portion of the INTRODUCE1 cell. We think
26298 that these attacks are infeasible (requiring the attacker to send
26299 on the order of zettabytes of altered cells in a short interval),
26300 but we'd rather block them off in case there are any classes of
26301 this attack that we missed. Reported by Willem Pinckaers.
26304 - Adjust the expiration time on our SSL session certificates to
26305 better match SSL certs seen in the wild. Resolves ticket 4014.
26306 - Change the default required uptime for a relay to be accepted as
26307 a HSDir (hidden service directory) from 24 hours to 25 hours.
26308 Improves on 0.2.0.10-alpha; resolves ticket 2649.
26309 - Add a VoteOnHidServDirectoriesV2 config option to allow directory
26310 authorities to abstain from voting on assignment of the HSDir
26311 consensus flag. Related to bug 2649.
26312 - Update to the September 6 2011 Maxmind GeoLite Country database.
26314 o Minor bugfixes (documentation and log messages):
26315 - Correct the man page to explain that HashedControlPassword and
26316 CookieAuthentication can both be set, in which case either method
26317 is sufficient to authenticate to Tor. Bugfix on 0.2.0.7-alpha,
26318 when we decided to allow these config options to both be set. Issue
26319 raised by bug 3898.
26320 - Demote the 'replay detected' log message emitted when a hidden
26321 service receives the same Diffie-Hellman public key in two different
26322 INTRODUCE2 cells to info level. A normal Tor client can cause that
26323 log message during its normal operation. Bugfix on 0.2.1.6-alpha;
26324 fixes part of bug 2442.
26325 - Demote the 'INTRODUCE2 cell is too {old,new}' log message to info
26326 level. There is nothing that a hidden service's operator can do
26327 to fix its clients' clocks. Bugfix on 0.2.1.6-alpha; fixes part
26329 - Clarify a log message specifying the characters permitted in
26330 HiddenServiceAuthorizeClient client names. Previously, the log
26331 message said that "[A-Za-z0-9+-_]" were permitted; that could have
26332 given the impression that every ASCII character between "+" and "_"
26333 was permitted. Now we say "[A-Za-z0-9+_-]". Bugfix on 0.2.1.5-alpha.
26336 - Provide a substitute implementation of lround() for MSVC, which
26337 apparently lacks it. Patch from Gisle Vanem.
26338 - Clean up some code issues that prevented Tor from building on older
26339 BSDs. Fixes bug 3894; reported by "grarpamp".
26340 - Search for a platform-specific version of "ar" when cross-compiling.
26341 Should fix builds on iOS. Resolves bug 3909, found by Marco Bonetti.
26344 Changes in version 0.2.3.3-alpha - 2011-09-01
26345 Tor 0.2.3.3-alpha adds a new "stream isolation" feature to improve Tor's
26346 security, and provides client-side support for the microdescriptor
26347 and optimistic data features introduced earlier in the 0.2.3.x
26348 series. It also includes numerous critical bugfixes in the (optional)
26349 bufferevent-based networking backend.
26351 o Major features (stream isolation):
26352 - You can now configure Tor so that streams from different
26353 applications are isolated on different circuits, to prevent an
26354 attacker who sees your streams as they leave an exit node from
26355 linking your sessions to one another. To do this, choose some way
26356 to distinguish the applications: have them connect to different
26357 SocksPorts, or have one of them use SOCKS4 while the other uses
26358 SOCKS5, or have them pass different authentication strings to the
26359 SOCKS proxy. Then, use the new SocksPort syntax to configure the
26360 degree of isolation you need. This implements Proposal 171.
26361 - There's a new syntax for specifying multiple client ports (such as
26362 SOCKSPort, TransPort, DNSPort, NATDPort): you can now just declare
26363 multiple *Port entries with full addr:port syntax on each.
26364 The old *ListenAddress format is still supported, but you can't
26365 mix it with the new *Port syntax.
26367 o Major features (other):
26368 - Enable microdescriptor fetching by default for clients. This allows
26369 clients to download a much smaller amount of directory information.
26370 To disable it (and go back to the old-style consensus and
26371 descriptors), set "UseMicrodescriptors 0" in your torrc file.
26372 - Tor's firewall-helper feature, introduced in 0.2.3.1-alpha (see the
26373 "PortForwarding" config option), now supports Windows.
26374 - When using an exit relay running 0.2.3.x, clients can now
26375 "optimistically" send data before the exit relay reports that
26376 the stream has opened. This saves a round trip when starting
26377 connections where the client speaks first (such as web browsing).
26378 This behavior is controlled by a consensus parameter (currently
26379 disabled). To turn it on or off manually, use the "OptimisticData"
26380 torrc option. Implements proposal 181; code by Ian Goldberg.
26382 o Major bugfixes (bufferevents, fixes on 0.2.3.1-alpha):
26383 - When using IOCP on Windows, we need to enable Libevent windows
26385 - The IOCP backend now works even when the user has not specified
26386 the (internal, debugging-only) _UseFilteringSSLBufferevents option.
26387 Fixes part of bug 3752.
26388 - Correctly record the bytes we've read and written when using
26389 bufferevents, so that we can include them in our bandwidth history
26390 and advertised bandwidth. Fixes bug 3803.
26391 - Apply rate-limiting only at the bottom of a chain of filtering
26392 bufferevents. This prevents us from filling up internal read
26393 buffers and violating rate-limits when filtering bufferevents
26394 are enabled. Fixes part of bug 3804.
26395 - Add high-watermarks to the output buffers for filtered
26396 bufferevents. This prevents us from filling up internal write
26397 buffers and wasting CPU cycles when filtering bufferevents are
26398 enabled. Fixes part of bug 3804.
26399 - Correctly notice when data has been written from a bufferevent
26400 without flushing it completely. Fixes bug 3805.
26401 - Fix a bug where server-side tunneled bufferevent-based directory
26402 streams would get closed prematurely. Fixes bug 3814.
26403 - Fix a use-after-free error with per-connection rate-limiting
26404 buckets. Fixes bug 3888.
26406 o Major bugfixes (also part of 0.2.2.31-rc):
26407 - If we're configured to write our ControlPorts to disk, only write
26408 them after switching UID and creating the data directory. This way,
26409 we don't fail when starting up with a nonexistent DataDirectory
26410 and a ControlPortWriteToFile setting based on that directory. Fixes
26411 bug 3747; bugfix on Tor 0.2.2.26-beta.
26414 - Added a new CONF_CHANGED event so that controllers can be notified
26415 of any configuration changes made by other controllers, or by the
26416 user. Implements ticket 1692.
26417 - Use evbuffer_copyout() in inspect_evbuffer(). This fixes a memory
26418 leak when using bufferevents, and lets Libevent worry about how to
26419 best copy data out of a buffer.
26420 - Replace files in stats/ rather than appending to them. Now that we
26421 include statistics in extra-info descriptors, it makes no sense to
26422 keep old statistics forever. Implements ticket 2930.
26424 o Minor features (build compatibility):
26425 - Limited, experimental support for building with nmake and MSVC.
26426 - Provide a substitute implementation of lround() for MSVC, which
26427 apparently lacks it. Patch from Gisle Vanem.
26429 o Minor features (also part of 0.2.2.31-rc):
26430 - Update to the August 2 2011 Maxmind GeoLite Country database.
26432 o Minor bugfixes (on 0.2.3.x-alpha):
26433 - Fix a spurious warning when parsing SOCKS requests with
26434 bufferevents enabled. Fixes bug 3615; bugfix on 0.2.3.2-alpha.
26435 - Get rid of a harmless warning that could happen on relays running
26436 with bufferevents. The warning was caused by someone doing an http
26437 request to a relay's orport. Also don't warn for a few related
26438 non-errors. Fixes bug 3700; bugfix on 0.2.3.1-alpha.
26440 o Minor bugfixes (on 2.2.x and earlier):
26441 - Correct the man page to explain that HashedControlPassword and
26442 CookieAuthentication can both be set, in which case either method
26443 is sufficient to authenticate to Tor. Bugfix on 0.2.0.7-alpha,
26444 when we decided to allow these config options to both be set. Issue
26445 raised by bug 3898.
26446 - The "--quiet" and "--hush" options now apply not only to Tor's
26447 behavior before logs are configured, but also to Tor's behavior in
26448 the absence of configured logs. Fixes bug 3550; bugfix on
26451 o Minor bugfixes (also part of 0.2.2.31-rc):
26452 - Write several files in text mode, on OSes that distinguish text
26453 mode from binary mode (namely, Windows). These files are:
26454 'buffer-stats', 'dirreq-stats', and 'entry-stats' on relays
26455 that collect those statistics; 'client_keys' and 'hostname' for
26456 hidden services that use authentication; and (in the tor-gencert
26457 utility) newly generated identity and signing keys. Previously,
26458 we wouldn't specify text mode or binary mode, leading to an
26459 assertion failure. Fixes bug 3607. Bugfix on 0.2.1.1-alpha (when
26460 the DirRecordUsageByCountry option which would have triggered
26461 the assertion failure was added), although this assertion failure
26462 would have occurred in tor-gencert on Windows in 0.2.0.1-alpha.
26463 - Selectively disable deprecation warnings on OS X because Lion
26464 started deprecating the shipped copy of openssl. Fixes bug 3643.
26465 - Remove an extra pair of quotation marks around the error
26466 message in control-port STATUS_GENERAL BUG events. Bugfix on
26467 0.1.2.6-alpha; fixes bug 3732.
26468 - When unable to format an address as a string, report its value
26469 as "???" rather than reusing the last formatted address. Bugfix
26472 o Code simplifications and refactoring:
26473 - Rewrite the listener-selection logic so that parsing which ports
26474 we want to listen on is now separate from binding to the ports
26478 - Building Tor with bufferevent support now requires Libevent
26479 2.0.13-stable or later. Previous versions of Libevent had bugs in
26480 SSL-related bufferevents and related issues that would make Tor
26481 work badly with bufferevents. Requiring 2.0.13-stable also allows
26482 Tor with bufferevents to take advantage of Libevent APIs
26483 introduced after 2.0.8-rc.
26486 Changes in version 0.2.2.32 - 2011-08-27
26487 The Tor 0.2.2 release series is dedicated to the memory of Andreas
26488 Pfitzmann (1958-2010), a pioneer in anonymity and privacy research,
26489 a founder of the PETS community, a leader in our field, a mentor,
26490 and a friend. He left us with these words: "I had the possibility
26491 to contribute to this world that is not as it should be. I hope I
26492 could help in some areas to make the world a better place, and that
26493 I could also encourage other people to be engaged in improving the
26494 world. Please, stay engaged. This world needs you, your love, your
26495 initiative -- now I cannot be part of that anymore."
26497 Tor 0.2.2.32, the first stable release in the 0.2.2 branch, is finally
26498 ready. More than two years in the making, this release features improved
26499 client performance and hidden service reliability, better compatibility
26500 for Android, correct behavior for bridges that listen on more than
26501 one address, more extensible and flexible directory object handling,
26502 better reporting of network statistics, improved code security, and
26503 many many other features and bugfixes.
26506 Changes in version 0.2.2.31-rc - 2011-08-17
26507 Tor 0.2.2.31-rc is the second and hopefully final release candidate
26508 for the Tor 0.2.2.x series.
26511 - Remove an extra pair of quotation marks around the error
26512 message in control-port STATUS_GENERAL BUG events. Bugfix on
26513 0.1.2.6-alpha; fixes bug 3732.
26514 - If we're configured to write our ControlPorts to disk, only write
26515 them after switching UID and creating the data directory. This way,
26516 we don't fail when starting up with a nonexistent DataDirectory
26517 and a ControlPortWriteToFile setting based on that directory. Fixes
26518 bug 3747; bugfix on Tor 0.2.2.26-beta.
26521 - Update to the August 2 2011 Maxmind GeoLite Country database.
26524 - Allow GETINFO fingerprint to return a fingerprint even when
26525 we have not yet built a router descriptor. Fixes bug 3577;
26526 bugfix on 0.2.0.1-alpha.
26527 - Write several files in text mode, on OSes that distinguish text
26528 mode from binary mode (namely, Windows). These files are:
26529 'buffer-stats', 'dirreq-stats', and 'entry-stats' on relays
26530 that collect those statistics; 'client_keys' and 'hostname' for
26531 hidden services that use authentication; and (in the tor-gencert
26532 utility) newly generated identity and signing keys. Previously,
26533 we wouldn't specify text mode or binary mode, leading to an
26534 assertion failure. Fixes bug 3607. Bugfix on 0.2.1.1-alpha (when
26535 the DirRecordUsageByCountry option which would have triggered
26536 the assertion failure was added), although this assertion failure
26537 would have occurred in tor-gencert on Windows in 0.2.0.1-alpha.
26538 - Selectively disable deprecation warnings on OS X because Lion
26539 started deprecating the shipped copy of openssl. Fixes bug 3643.
26540 - When unable to format an address as a string, report its value
26541 as "???" rather than reusing the last formatted address. Bugfix
26545 Changes in version 0.2.3.2-alpha - 2011-07-18
26546 Tor 0.2.3.2-alpha introduces two new experimental features:
26547 microdescriptors and pluggable transports. It also continues cleaning
26548 up a variety of recently introduced features.
26551 - Clients can now use microdescriptors instead of regular descriptors
26552 to build circuits. Microdescriptors are authority-generated
26553 summaries of regular descriptors' contents, designed to change
26554 very rarely (see proposal 158 for details). This feature is
26555 designed to save bandwidth, especially for clients on slow internet
26556 connections. It's off by default for now, since nearly no caches
26557 support it, but it will be on-by-default for clients in a future
26558 version. You can use the UseMicrodescriptors option to turn it on.
26559 - Tor clients using bridges can now be configured to use a separate
26560 'transport' proxy for each bridge. This approach helps to resist
26561 censorship by allowing bridges to use protocol obfuscation
26562 plugins. It implements part of proposal 180. Implements ticket 2841.
26563 - While we're trying to bootstrap, record how many TLS connections
26564 fail in each state, and report which states saw the most failures
26565 in response to any bootstrap failures. This feature may speed up
26566 diagnosis of censorship events. Implements ticket 3116.
26568 o Major bugfixes (on 0.2.3.1-alpha):
26569 - When configuring a large set of nodes in EntryNodes (as with
26570 'EntryNodes {cc}' or 'EntryNodes 1.1.1.1/16'), choose only a
26571 random subset to be guards, and choose them in random
26572 order. Fixes bug 2798.
26573 - Tor could crash when remembering a consensus in a non-used consensus
26574 flavor without having a current consensus set. Fixes bug 3361.
26575 - Comparing an unknown address to a microdescriptor's shortened exit
26576 policy would always give a "rejected" result. Fixes bug 3599.
26577 - Using microdescriptors as a client no longer prevents Tor from
26578 uploading and downloading hidden service descriptors. Fixes
26582 - Allow nameservers with IPv6 address. Resolves bug 2574.
26583 - Accept attempts to include a password authenticator in the
26584 handshake, as supported by SOCKS5. This handles SOCKS clients that
26585 don't know how to omit a password when authenticating. Resolves
26587 - When configuring a large set of nodes in EntryNodes, and there are
26588 enough of them listed as Guard so that we don't need to consider
26589 the non-guard entries, prefer the ones listed with the Guard flag.
26590 - Check for and recover from inconsistency in the microdescriptor
26591 cache. This will make it harder for us to accidentally free a
26592 microdescriptor without removing it from the appropriate data
26593 structures. Fixes issue 3135; issue noted by "wanoskarnet".
26594 - Log SSL state transitions at log level DEBUG, log domain
26595 HANDSHAKE. This can be useful for debugging censorship events.
26596 Implements ticket 3264.
26597 - Add port 6523 (Gobby) to LongLivedPorts. Patch by intrigeri;
26598 implements ticket 3439.
26600 o Minor bugfixes (on 0.2.3.1-alpha):
26601 - Do not free all general-purpose regular descriptors just
26602 because microdescriptor use is enabled. Fixes bug 3113.
26603 - Correctly link libevent_openssl when --enable-static-libevent
26604 is passed to configure. Fixes bug 3118.
26605 - Bridges should not complain during their heartbeat log messages that
26606 they are unlisted in the consensus: that's more or less the point
26607 of being a bridge. Fixes bug 3183.
26608 - Report a SIGNAL event to controllers when acting on a delayed
26609 SIGNAL NEWNYM command. Previously, we would report a SIGNAL
26610 event to the controller if we acted on a SIGNAL NEWNYM command
26611 immediately, and otherwise not report a SIGNAL event for the
26612 command at all. Fixes bug 3349.
26613 - Fix a crash when handling the SIGNAL controller command or
26614 reporting ERR-level status events with bufferevents enabled. Found
26615 by Robert Ransom. Fixes bug 3367.
26616 - Always ship the tor-fw-helper manpage in our release tarballs.
26617 Fixes bug 3389. Reported by Stephen Walker.
26618 - Fix a class of double-mark-for-close bugs when bufferevents
26619 are enabled. Fixes bug 3403.
26620 - Update tor-fw-helper to support libnatpmp-20110618. Fixes bug 3434.
26621 - Add SIGNAL to the list returned by the 'GETINFO events/names'
26622 control-port command. Fixes part of bug 3465.
26623 - Prevent using negative indices during unit test runs when read_all()
26624 fails. Spotted by coverity.
26625 - Fix a rare memory leak when checking the nodelist without it being
26626 present. Found by coverity.
26627 - Only try to download a microdescriptor-flavored consensus from
26628 a directory cache that provides them.
26630 o Minor bugfixes (on 0.2.2.x and earlier):
26631 - Assert that hidden-service-related operations are not performed
26632 using single-hop circuits. Previously, Tor would assert that
26633 client-side streams are not attached to single-hop circuits,
26634 but not that other sensitive operations on the client and service
26635 side are not performed using single-hop circuits. Fixes bug 3332;
26637 - Don't publish a new relay descriptor when we reload our onion key,
26638 unless the onion key has actually changed. Fixes bug 3263 and
26639 resolves another cause of bug 1810. Bugfix on 0.1.1.11-alpha.
26640 - Allow GETINFO fingerprint to return a fingerprint even when
26641 we have not yet built a router descriptor. Fixes bug 3577;
26642 bugfix on 0.2.0.1-alpha.
26643 - Make 'tor --digests' list hashes of all Tor source files. Bugfix
26644 on 0.2.2.4-alpha; fixes bug 3427.
26646 o Code simplification and refactoring:
26647 - Use tor_sscanf() in place of scanf() in more places through the
26648 code. This makes us a little more locale-independent, and
26649 should help shut up code-analysis tools that can't tell
26650 a safe sscanf string from a dangerous one.
26651 - Use tt_assert(), not tor_assert(), for checking for test failures.
26652 This makes the unit tests more able to go on in the event that
26654 - Split connection_about_to_close() into separate functions for each
26658 - On Windows, we now define the _WIN32_WINNT macros only if they
26659 are not already defined. This lets the person building Tor decide,
26660 if they want, to require a later version of Windows.
26663 Changes in version 0.2.2.30-rc - 2011-07-07
26664 Tor 0.2.2.30-rc is the first release candidate for the Tor 0.2.2.x
26665 series. It fixes a few smaller bugs, but generally appears stable.
26666 Please test it and let us know whether it is!
26669 - Send a SUCCEEDED stream event to the controller when a reverse
26670 resolve succeeded. Fixes bug 3536; bugfix on 0.0.8pre1. Issue
26671 discovered by katmagic.
26672 - Always NUL-terminate the sun_path field of a sockaddr_un before
26673 passing it to the kernel. (Not a security issue: kernels are
26674 smart enough to reject bad sockaddr_uns.) Found by Coverity;
26675 CID #428. Bugfix on Tor 0.2.0.3-alpha.
26676 - Don't stack-allocate the list of supplementary GIDs when we're
26677 about to log them. Stack-allocating NGROUPS_MAX gid_t elements
26678 could take up to 256K, which is way too much stack. Found by
26679 Coverity; CID #450. Bugfix on 0.2.1.7-alpha.
26680 - Add BUILDTIMEOUT_SET to the list returned by the 'GETINFO
26681 events/names' control-port command. Bugfix on 0.2.2.9-alpha;
26682 fixes part of bug 3465.
26683 - Fix a memory leak when receiving a descriptor for a hidden
26684 service we didn't ask for. Found by Coverity; CID #30. Bugfix
26688 - Update to the July 1 2011 Maxmind GeoLite Country database.
26691 Changes in version 0.2.2.29-beta - 2011-06-20
26692 Tor 0.2.2.29-beta reverts an accidental behavior change for users who
26693 have bridge lines in their torrc but don't want to use them; gets
26694 us closer to having the control socket feature working on Debian;
26695 and fixes a variety of smaller bugs.
26698 - Revert the UseBridges option to its behavior before 0.2.2.28-beta.
26699 When we changed the default behavior to "use bridges if any
26700 are listed in the torrc", we surprised users who had bridges
26701 in their torrc files but who didn't actually want to use them.
26702 Partial resolution for bug 3354.
26705 - Don't attach new streams to old rendezvous circuits after SIGNAL
26706 NEWNYM. Previously, we would keep using an existing rendezvous
26707 circuit if it remained open (i.e. if it were kept open by a
26708 long-lived stream, or if a new stream were attached to it before
26709 Tor could notice that it was old and no longer in use). Bugfix on
26710 0.1.1.15-rc; fixes bug 3375.
26713 - Fix a bug when using ControlSocketsGroupWritable with User. The
26714 directory's group would be checked against the current group, not
26715 the configured group. Patch by Jérémy Bobbio. Fixes bug 3393;
26716 bugfix on 0.2.2.26-beta.
26717 - Make connection_printf_to_buf()'s behavior sane. Its callers
26718 expect it to emit a CRLF iff the format string ends with CRLF;
26719 it actually emitted a CRLF iff (a) the format string ended with
26720 CRLF or (b) the resulting string was over 1023 characters long or
26721 (c) the format string did not end with CRLF *and* the resulting
26722 string was 1021 characters long or longer. Bugfix on 0.1.1.9-alpha;
26723 fixes part of bug 3407.
26724 - Make send_control_event_impl()'s behavior sane. Its callers
26725 expect it to always emit a CRLF at the end of the string; it
26726 might have emitted extra control characters as well. Bugfix on
26727 0.1.1.9-alpha; fixes another part of bug 3407.
26728 - Make crypto_rand_int() check the value of its input correctly.
26729 Previously, it accepted values up to UINT_MAX, but could return a
26730 negative number if given a value above INT_MAX+1. Found by George
26731 Kadianakis. Fixes bug 3306; bugfix on 0.2.2pre14.
26732 - Avoid a segfault when reading a malformed circuit build state
26733 with more than INT_MAX entries. Found by wanoskarnet. Bugfix on
26735 - When asked about a DNS record type we don't support via a
26736 client DNSPort, reply with NOTIMPL rather than an empty
26737 reply. Patch by intrigeri. Fixes bug 3369; bugfix on 2.0.1-alpha.
26738 - Fix a rare memory leak during stats writing. Found by coverity.
26741 - Update to the June 1 2011 Maxmind GeoLite Country database.
26743 o Code simplifications and refactoring:
26744 - Remove some dead code as indicated by coverity.
26745 - Remove a few dead assignments during router parsing. Found by
26747 - Add some forgotten return value checks during unit tests. Found
26749 - Don't use 1-bit wide signed bit fields. Found by coverity.
26752 Changes in version 0.2.2.28-beta - 2011-06-04
26753 Tor 0.2.2.28-beta makes great progress towards a new stable release: we
26754 fixed a big bug in whether relays stay in the consensus consistently,
26755 we moved closer to handling bridges and hidden services correctly,
26756 and we started the process of better handling the dreaded "my Vidalia
26757 died, and now my Tor demands a password when I try to reconnect to it"
26761 - Don't decide to make a new descriptor when receiving a HUP signal.
26762 This bug has caused a lot of 0.2.2.x relays to disappear from the
26763 consensus periodically. Fixes the most common case of triggering
26764 bug 1810; bugfix on 0.2.2.7-alpha.
26765 - Actually allow nameservers with IPv6 addresses. Fixes bug 2574.
26766 - Don't try to build descriptors if "ORPort auto" is set and we
26767 don't know our actual ORPort yet. Fix for bug 3216; bugfix on
26769 - Resolve a crash that occurred when setting BridgeRelay to 1 with
26770 accounting enabled. Fixes bug 3228; bugfix on 0.2.2.18-alpha.
26771 - Apply circuit timeouts to opened hidden-service-related circuits
26772 based on the correct start time. Previously, we would apply the
26773 circuit build timeout based on time since the circuit's creation;
26774 it was supposed to be applied based on time since the circuit
26775 entered its current state. Bugfix on 0.0.6; fixes part of bug 1297.
26776 - Use the same circuit timeout for client-side introduction
26777 circuits as for other four-hop circuits, rather than the timeout
26778 for single-hop directory-fetch circuits; the shorter timeout may
26779 have been appropriate with the static circuit build timeout in
26780 0.2.1.x and earlier, but caused many hidden service access attempts
26781 to fail with the adaptive CBT introduced in 0.2.2.2-alpha. Bugfix
26782 on 0.2.2.2-alpha; fixes another part of bug 1297.
26783 - In ticket 2511 we fixed a case where you could use an unconfigured
26784 bridge if you had configured it as a bridge the last time you ran
26785 Tor. Now fix another edge case: if you had configured it as a bridge
26786 but then switched to a different bridge via the controller, you
26787 would still be willing to use the old one. Bugfix on 0.2.0.1-alpha;
26791 - Add an __OwningControllerProcess configuration option and a
26792 TAKEOWNERSHIP control-port command. Now a Tor controller can ensure
26793 that when it exits, Tor will shut down. Implements feature 3049.
26794 - If "UseBridges 1" is set and no bridges are configured, Tor will
26795 now refuse to build any circuits until some bridges are set.
26796 If "UseBridges auto" is set, Tor will use bridges if they are
26797 configured and we are not running as a server, but otherwise will
26798 make circuits as usual. The new default is "auto". Patch by anonym,
26799 so the Tails LiveCD can stop automatically revealing you as a Tor
26803 - Fix warnings from GCC 4.6's "-Wunused-but-set-variable" option.
26804 - Remove a trailing asterisk from "exit-policy/default" in the
26805 output of the control port command "GETINFO info/names". Bugfix
26807 - Use a wide type to hold sockets when built for 64-bit Windows builds.
26809 - Warn when the user configures two HiddenServiceDir lines that point
26810 to the same directory. Bugfix on 0.0.6 (the version introducing
26811 HiddenServiceDir); fixes bug 3289.
26812 - Remove dead code from rend_cache_lookup_v2_desc_as_dir. Fixes
26813 part of bug 2748; bugfix on 0.2.0.10-alpha.
26814 - Log malformed requests for rendezvous descriptors as protocol
26815 warnings, not warnings. Also, use a more informative log message
26816 in case someone sees it at log level warning without prior
26817 info-level messages. Fixes the other part of bug 2748; bugfix
26819 - Clear the table recording the time of the last request for each
26820 hidden service descriptor from each HS directory on SIGNAL NEWNYM.
26821 Previously, we would clear our HS descriptor cache on SIGNAL
26822 NEWNYM, but if we had previously retrieved a descriptor (or tried
26823 to) from every directory responsible for it, we would refuse to
26824 fetch it again for up to 15 minutes. Bugfix on 0.2.2.25-alpha;
26826 - Fix a log message that said "bits" while displaying a value in
26827 bytes. Found by wanoskarnet. Fixes bug 3318; bugfix on
26829 - When checking for 1024-bit keys, check for 1024 bits, not 128
26830 bytes. This allows Tor to correctly discard keys of length 1017
26831 through 1023. Bugfix on 0.0.9pre5.
26834 - Relays now log the reason for publishing a new relay descriptor,
26835 so we have a better chance of hunting down instances of bug 1810.
26836 Resolves ticket 3252.
26837 - Revise most log messages that refer to nodes by nickname to
26838 instead use the "$key=nickname at address" format. This should be
26839 more useful, especially since nicknames are less and less likely
26840 to be unique. Resolves ticket 3045.
26841 - Log (at info level) when purging pieces of hidden-service-client
26842 state because of SIGNAL NEWNYM.
26845 - Remove undocumented option "-F" from tor-resolve: it hasn't done
26846 anything since 0.2.1.16-rc.
26849 Changes in version 0.2.2.27-beta - 2011-05-18
26850 Tor 0.2.2.27-beta fixes a bridge-related stability bug in the previous
26851 release, and also adds a few more general bugfixes.
26854 - Fix a crash bug when changing bridges in a running Tor process.
26855 Fixes bug 3213; bugfix on 0.2.2.26-beta.
26856 - When the controller configures a new bridge, don't wait 10 to 60
26857 seconds before trying to fetch its descriptor. Bugfix on
26858 0.2.0.3-alpha; fixes bug 3198 (suggested by 2355).
26861 - Require that onion keys have exponent 65537 in microdescriptors too.
26862 Fixes more of bug 3207; bugfix on 0.2.2.26-beta.
26863 - Tor used to limit HttpProxyAuthenticator values to 48 characters.
26864 Changed the limit to 512 characters by removing base64 newlines.
26865 Fixes bug 2752. Fix by Michael Yakubovich.
26866 - When a client starts or stops using bridges, never use a circuit
26867 that was built before the configuration change. This behavior could
26868 put at risk a user who uses bridges to ensure that her traffic
26869 only goes to the chosen addresses. Bugfix on 0.2.0.3-alpha; fixes
26873 Changes in version 0.2.2.26-beta - 2011-05-17
26874 Tor 0.2.2.26-beta fixes a variety of potential privacy problems. It
26875 also introduces a new "socksport auto" approach that should make it
26876 easier to run multiple Tors on the same system, and does a lot of
26877 cleanup to get us closer to a release candidate.
26879 o Security/privacy fixes:
26880 - Replace all potentially sensitive memory comparison operations
26881 with versions whose runtime does not depend on the data being
26882 compared. This will help resist a class of attacks where an
26883 adversary can use variations in timing information to learn
26884 sensitive data. Fix for one case of bug 3122. (Safe memcmp
26885 implementation by Robert Ransom based partially on code by DJB.)
26886 - When receiving a hidden service descriptor, check that it is for
26887 the hidden service we wanted. Previously, Tor would store any
26888 hidden service descriptors that a directory gave it, whether it
26889 wanted them or not. This wouldn't have let an attacker impersonate
26890 a hidden service, but it did let directories pre-seed a client
26891 with descriptors that it didn't want. Bugfix on 0.0.6.
26892 - On SIGHUP, do not clear out all TrackHostExits mappings, client
26893 DNS cache entries, and virtual address mappings: that's what
26894 NEWNYM is for. Fixes bug 1345; bugfix on 0.1.0.1-rc.
26897 - The options SocksPort, ControlPort, and so on now all accept a
26898 value "auto" that opens a socket on an OS-selected port. A
26899 new ControlPortWriteToFile option tells Tor to write its
26900 actual control port or ports to a chosen file. If the option
26901 ControlPortFileGroupReadable is set, the file is created as
26902 group-readable. Now users can run two Tor clients on the same
26903 system without needing to manually mess with parameters. Resolves
26904 part of ticket 3076.
26905 - Set SO_REUSEADDR on all sockets, not just listeners. This should
26906 help busy exit nodes avoid running out of useable ports just
26907 because all the ports have been used in the near past. Resolves
26911 - New "GETINFO net/listeners/(type)" controller command to return
26912 a list of addresses and ports that are bound for listeners for a
26913 given connection type. This is useful when the user has configured
26914 "SocksPort auto" and the controller needs to know which port got
26915 chosen. Resolves another part of ticket 3076.
26916 - Add a new ControlSocketsGroupWritable configuration option: when
26917 it is turned on, ControlSockets are group-writeable by the default
26918 group of the current user. Patch by Jérémy Bobbio; implements
26920 - Tor now refuses to create a ControlSocket in a directory that is
26921 world-readable (or group-readable if ControlSocketsGroupWritable
26922 is 0). This is necessary because some operating systems do not
26923 enforce permissions on an AF_UNIX sockets. Permissions on the
26924 directory holding the socket, however, seems to work everywhere.
26925 - Rate-limit a warning about failures to download v2 networkstatus
26926 documents. Resolves part of bug 1352.
26927 - Backport code from 0.2.3.x that allows directory authorities to
26928 clean their microdescriptor caches. Needed to resolve bug 2230.
26929 - When an HTTPS proxy reports "403 Forbidden", we now explain
26930 what it means rather than calling it an unexpected status code.
26931 Closes bug 2503. Patch from Michael Yakubovich.
26932 - Update to the May 1 2011 Maxmind GeoLite Country database.
26935 - Authorities now clean their microdesc cache periodically and when
26936 reading from disk initially, not only when adding new descriptors.
26937 This prevents a bug where we could lose microdescriptors. Bugfix
26938 on 0.2.2.6-alpha. Fixes bug 2230.
26939 - Do not crash when our configuration file becomes unreadable, for
26940 example due to a permissions change, between when we start up
26941 and when a controller calls SAVECONF. Fixes bug 3135; bugfix
26943 - Avoid a bug that would keep us from replacing a microdescriptor
26944 cache on Windows. (We would try to replace the file while still
26945 holding it open. That's fine on Unix, but Windows doesn't let us
26946 do that.) Bugfix on 0.2.2.6-alpha; bug found by wanoskarnet.
26947 - Add missing explanations for the authority-related torrc options
26948 RephistTrackTime, BridgePassword, and V3AuthUseLegacyKey in the
26949 man page. Resolves issue 2379.
26950 - As an authority, do not upload our own vote or signature set to
26951 ourself. It would tell us nothing new, and as of 0.2.2.24-alpha,
26952 it would get flagged as a duplicate. Resolves bug 3026.
26953 - Accept hidden service descriptors if we think we might be a hidden
26954 service directory, regardless of what our consensus says. This
26955 helps robustness, since clients and hidden services can sometimes
26956 have a more up-to-date view of the network consensus than we do,
26957 and if they think that the directory authorities list us a HSDir,
26958 we might actually be one. Related to bug 2732; bugfix on
26960 - When a controller changes TrackHostExits, remove mappings for
26961 hosts that should no longer have their exits tracked. Bugfix on
26963 - When a controller changes VirtualAddrNetwork, remove any mappings
26964 for hosts that were automapped to the old network. Bugfix on
26966 - When a controller changes one of the AutomapHosts* options, remove
26967 any mappings for hosts that should no longer be automapped. Bugfix
26969 - Do not reset the bridge descriptor download status every time we
26970 re-parse our configuration or get a configuration change. Fixes
26971 bug 3019; bugfix on 0.2.0.3-alpha.
26973 o Minor bugfixes (code cleanup):
26974 - When loading the microdesc journal, remember its current size.
26975 In 0.2.2, this helps prevent the microdesc journal from growing
26976 without limit on authorities (who are the only ones to use it in
26977 0.2.2). Fixes a part of bug 2230; bugfix on 0.2.2.6-alpha.
26978 Fix posted by "cypherpunks."
26979 - The microdesc journal is supposed to get rebuilt only if it is
26980 at least _half_ the length of the store, not _twice_ the length
26981 of the store. Bugfix on 0.2.2.6-alpha; fixes part of bug 2230.
26982 - Fix a potential null-pointer dereference while computing a
26983 consensus. Bugfix on 0.2.0.3-alpha, found with the help of
26985 - Avoid a possible null-pointer dereference when rebuilding the mdesc
26986 cache without actually having any descriptors to cache. Bugfix on
26987 0.2.2.6-alpha. Issue discovered using clang's static analyzer.
26988 - If we fail to compute the identity digest of a v3 legacy keypair,
26989 warn, and don't use a buffer-full of junk instead. Bugfix on
26990 0.2.1.1-alpha; fixes bug 3106.
26991 - Resolve an untriggerable issue in smartlist_string_num_isin(),
26992 where if the function had ever in the future been used to check
26993 for the presence of a too-large number, it would have given an
26994 incorrect result. (Fortunately, we only used it for 16-bit
26995 values.) Fixes bug 3175; bugfix on 0.1.0.1-rc.
26996 - Require that introduction point keys and onion handshake keys
26997 have a public exponent of 65537. Starts to fix bug 3207; bugfix
27000 o Removed features:
27001 - Caches no longer download and serve v2 networkstatus documents
27002 unless FetchV2Networkstatus flag is set: these documents haven't
27003 haven't been used by clients or relays since 0.2.0.x. Resolves
27007 Changes in version 0.2.3.1-alpha - 2011-05-05
27008 Tor 0.2.3.1-alpha adds some new experimental features, including support
27009 for an improved network IO backend, IOCP networking on Windows,
27010 microdescriptor caching, "fast-start" support for streams, and automatic
27011 home router configuration. There are also numerous internal improvements
27012 to try to make the code easier for developers to work with.
27014 This is the first alpha release in a new series, so expect there to be
27015 bugs. Users who would rather test out a more stable branch should
27016 stay with 0.2.2.x for now.
27019 - Tor can now optionally build with the "bufferevents" buffered IO
27020 backend provided by Libevent 2. To use this feature, make sure you
27021 have the latest possible version of Libevent, and pass the
27022 --enable-bufferevents flag to configure when building Tor from
27023 source. This feature will make our networking code more flexible,
27024 let us stack layers on each other, and let us use more efficient
27025 zero-copy transports where available.
27026 - As an experimental feature, Tor can use IOCP for networking on Windows.
27027 Once this code is tuned and optimized, it promises much better
27028 performance than the select-based backend we've used in the past. To
27029 try this feature, you must build Tor with Libevent 2, configure Tor
27030 with the "bufferevents" buffered IO backend, and add "DisableIOCP 0" to
27031 your torrc. There are known bugs here: only try this if you can help
27032 debug it as it breaks.
27033 - The EntryNodes option can now include country codes like {de} or IP
27034 addresses or network masks. Previously we had disallowed these options
27035 because we didn't have an efficient way to keep the list up to
27036 date. Fixes bug 1982, but see bug 2798 for an unresolved issue here.
27037 - Exit nodes now accept and queue data on not-yet-connected streams.
27038 Previously, the client wasn't allowed to send data until the stream was
27039 connected, which slowed down all connections. This change will enable
27040 clients to perform a "fast-start" on streams and send data without
27041 having to wait for a confirmation that the stream has opened. (Patch
27042 from Ian Goldberg; implements the server side of Proposal 174.)
27043 - Tor now has initial support for automatic port mapping on the many
27044 home routers that support NAT-PMP or UPnP. (Not yet supported on
27045 Windows). To build the support code, you'll need to have libnatpnp
27046 library and/or the libminiupnpc library, and you'll need to enable the
27047 feature specifically by passing "--enable-upnp" and/or
27048 "--enable-natpnp" to configure. To turn it on, use the new
27049 PortForwarding option.
27050 - Caches now download, cache, and serve multiple "flavors" of the
27051 consensus, including a flavor that describes microdescriptors.
27052 - Caches now download, cache, and serve microdescriptors -- small
27053 summaries of router descriptors that are authenticated by all of the
27054 directory authorities. Once enough caches are running this code,
27055 clients will be able to save significant amounts of directory bandwidth
27056 by downloading microdescriptors instead of router descriptors.
27059 - Make logging resolution configurable with a new LogTimeGranularity
27060 option, and change the default from 1 millisecond to 1 second.
27061 Implements enhancement 1668.
27062 - We log which torrc file we're using on startup. Implements ticket
27064 - Ordinarily, Tor does not count traffic from private addresses (like
27065 127.0.0.1 or 10.0.0.1) when calculating rate limits or accounting.
27066 There is now a new option, CountPrivateBandwidth, to disable this
27067 behavior. Patch from Daniel Cagara.
27068 - New --enable-static-tor configure option for building Tor as
27069 statically as possible. Idea, general hackery and thoughts from
27070 Alexei Czeskis, John Gilmore, Jacob Appelbaum. Implements ticket
27072 - If you set the NumCPUs option to 0, Tor will now try to detect how
27073 many CPUs you have. This is the new default behavior.
27074 - Turn on directory request statistics by default and include them in
27075 extra-info descriptors. Don't break if we have no GeoIP database.
27076 - Relays that set "ConnDirectionStatistics 1" write statistics on the
27077 bidirectional use of connections to disk every 24 hours.
27078 - Add a GeoIP file digest to the extra-info descriptor. Implements
27080 - The NodeFamily option -- which let you declare that you want to
27081 consider nodes to be part of a family whether they list themselves
27082 that way or not -- now allows IP address ranges and country codes.
27083 - Add a new 'Heartbeat' log message type to periodically log a message
27084 describing Tor's status at level Notice. This feature is meant for
27085 operators who log at notice, and want to make sure that their Tor
27086 server is still working. Implementation by George Kadianakis.
27088 o Minor bugfixes (on 0.2.2.25-alpha):
27089 - When loading the microdesc journal, remember its current size.
27090 In 0.2.2, this helps prevent the microdesc journal from growing
27091 without limit on authorities (who are the only ones to use it in
27092 0.2.2). Fixes a part of bug 2230; bugfix on 0.2.2.6-alpha.
27093 Fix posted by "cypherpunks."
27094 - The microdesc journal is supposed to get rebuilt only if it is
27095 at least _half_ the length of the store, not _twice_ the length
27096 of the store. Bugfix on 0.2.2.6-alpha; fixes part of bug 2230.
27097 - If as an authority we fail to compute the identity digest of a v3
27098 legacy keypair, warn, and don't use a buffer-full of junk instead.
27099 Bugfix on 0.2.1.1-alpha; fixes bug 3106.
27100 - Authorities now clean their microdesc cache periodically and when
27101 reading from disk initially, not only when adding new descriptors.
27102 This prevents a bug where we could lose microdescriptors. Bugfix
27105 o Minor features (controller):
27106 - Add a new SIGNAL event to the controller interface so that
27107 controllers can be notified when Tor handles a signal. Resolves
27108 issue 1955. Patch by John Brooks.
27109 - Add a new GETINFO option to get total bytes read and written. Patch
27110 from pipe, revised by atagar. Resolves ticket 2345.
27111 - Implement some GETINFO controller fields to provide information about
27112 the Tor process's pid, euid, username, and resource limits.
27115 - Our build system requires automake 1.6 or later to create the
27116 Makefile.in files. Previously, you could have used 1.4.
27117 This only affects developers and people building Tor from git;
27118 people who build Tor from the source distribution without changing
27119 the Makefile.am files should be fine.
27120 - Our autogen.sh script uses autoreconf to launch autoconf, automake, and
27121 so on. This is more robust against some of the failure modes
27122 associated with running the autotools pieces on their own.
27124 o Minor packaging issues:
27125 - On OpenSUSE, create the /var/run/tor directory on startup if it is not
27126 already created. Patch from Andreas Stieger. Fixes bug 2573.
27128 o Code simplifications and refactoring:
27129 - A major revision to our internal node-selecting and listing logic.
27130 Tor already had at least two major ways to look at the question of
27131 "which Tor servers do we know about": a list of router descriptors,
27132 and a list of entries in the current consensus. With
27133 microdescriptors, we're adding a third. Having so many systems
27134 without an abstraction layer over them was hurting the codebase.
27135 Now, we have a new "node_t" abstraction that presents a consistent
27136 interface to a client's view of a Tor node, and holds (nearly) all
27137 of the mutable state formerly in routerinfo_t and routerstatus_t.
27138 - The helper programs tor-gencert, tor-resolve, and tor-checkkey
27139 no longer link against Libevent: they never used it, but
27140 our library structure used to force them to link it.
27142 o Removed features:
27143 - Remove some old code to work around even older versions of Tor that
27144 used forked processes to handle DNS requests. Such versions of Tor
27145 are no longer in use as servers.
27147 o Documentation fixes:
27148 - Correct a broken faq link in the INSTALL file. Fixes bug 2307.
27149 - Add missing documentation for the authority-related torrc options
27150 RephistTrackTime, BridgePassword, and V3AuthUseLegacyKey. Resolves
27154 Changes in version 0.2.2.25-alpha - 2011-04-29
27155 Tor 0.2.2.25-alpha fixes many bugs: hidden service clients are more
27156 robust, routers no longer overreport their bandwidth, Win7 should crash
27157 a little less, and NEWNYM (as used by Vidalia's "new identity" button)
27158 now prevents hidden service-related activity from being linkable. It
27159 provides more information to Vidalia so you can see if your bridge is
27160 working. Also, 0.2.2.25-alpha revamps the Entry/Exit/ExcludeNodes and
27161 StrictNodes configuration options to make them more reliable, more
27162 understandable, and more regularly applied. If you use those options,
27163 please see the revised documentation for them in the manual page.
27166 - Relays were publishing grossly inflated bandwidth values because
27167 they were writing their state files wrong--now they write the
27168 correct value. Also, resume reading bandwidth history from the
27169 state file correctly. Fixes bug 2704; bugfix on 0.2.2.23-alpha.
27170 - Improve hidden service robustness: When we find that we have
27171 extended a hidden service's introduction circuit to a relay not
27172 listed as an introduction point in the HS descriptor we currently
27173 have, retry with an introduction point from the current
27174 descriptor. Previously we would just give up. Fixes bugs 1024 and
27175 1930; bugfix on 0.2.0.10-alpha.
27176 - Clients now stop trying to use an exit node associated with a given
27177 destination by TrackHostExits if they fail to reach that exit node.
27178 Fixes bug 2999. Bugfix on 0.2.0.20-rc.
27179 - Fix crash bug on platforms where gmtime and localtime can return
27180 NULL. Windows 7 users were running into this one. Fixes part of bug
27181 2077. Bugfix on all versions of Tor. Found by boboper.
27183 o Security and stability fixes:
27184 - Don't double-free a parsable, but invalid, microdescriptor, even if
27185 it is followed in the blob we're parsing by an unparsable
27186 microdescriptor. Fixes an issue reported in a comment on bug 2954.
27187 Bugfix on 0.2.2.6-alpha; fix by "cypherpunks".
27188 - If the Nickname configuration option isn't given, Tor would pick a
27189 nickname based on the local hostname as the nickname for a relay.
27190 Because nicknames are not very important in today's Tor and the
27191 "Unnamed" nickname has been implemented, this is now problematic
27192 behavior: It leaks information about the hostname without being
27193 useful at all. Fixes bug 2979; bugfix on 0.1.2.2-alpha, which
27194 introduced the Unnamed nickname. Reported by tagnaq.
27195 - Fix an uncommon assertion failure when running with DNSPort under
27196 heavy load. Fixes bug 2933; bugfix on 0.2.0.1-alpha.
27197 - Avoid linkability based on cached hidden service descriptors: forget
27198 all hidden service descriptors cached as a client when processing a
27199 SIGNAL NEWNYM command. Fixes bug 3000; bugfix on 0.0.6.
27202 - Export GeoIP information on bridge usage to controllers even if we
27203 have not yet been running for 24 hours. Now Vidalia bridge operators
27204 can get more accurate and immediate feedback about their
27205 contributions to the network.
27207 o Major features and bugfixes (node selection):
27208 - Revise and reconcile the meaning of the ExitNodes, EntryNodes,
27209 ExcludeEntryNodes, ExcludeExitNodes, ExcludeNodes, and StrictNodes
27210 options. Previously, we had been ambiguous in describing what
27211 counted as an "exit" node, and what operations exactly "StrictNodes
27212 0" would permit. This created confusion when people saw nodes built
27213 through unexpected circuits, and made it hard to tell real bugs from
27214 surprises. Now the intended behavior is:
27215 . "Exit", in the context of ExitNodes and ExcludeExitNodes, means
27216 a node that delivers user traffic outside the Tor network.
27217 . "Entry", in the context of EntryNodes, means a node used as the
27218 first hop of a multihop circuit. It doesn't include direct
27219 connections to directory servers.
27220 . "ExcludeNodes" applies to all nodes.
27221 . "StrictNodes" changes the behavior of ExcludeNodes only. When
27222 StrictNodes is set, Tor should avoid all nodes listed in
27223 ExcludeNodes, even when it will make user requests fail. When
27224 StrictNodes is *not* set, then Tor should follow ExcludeNodes
27225 whenever it can, except when it must use an excluded node to
27226 perform self-tests, connect to a hidden service, provide a
27227 hidden service, fulfill a .exit request, upload directory
27228 information, or fetch directory information.
27229 Collectively, the changes to implement the behavior fix bug 1090.
27230 - ExcludeNodes now takes precedence over EntryNodes and ExitNodes: if
27231 a node is listed in both, it's treated as excluded.
27232 - ExcludeNodes now applies to directory nodes -- as a preference if
27233 StrictNodes is 0, or an absolute requirement if StrictNodes is 1.
27234 Don't exclude all the directory authorities and set StrictNodes to 1
27235 unless you really want your Tor to break.
27236 - ExcludeNodes and ExcludeExitNodes now override exit enclaving.
27237 - ExcludeExitNodes now overrides .exit requests.
27238 - We don't use bridges listed in ExcludeNodes.
27239 - When StrictNodes is 1:
27240 . We now apply ExcludeNodes to hidden service introduction points
27241 and to rendezvous points selected by hidden service users. This
27242 can make your hidden service less reliable: use it with caution!
27243 . If we have used ExcludeNodes on ourself, do not try relay
27244 reachability self-tests.
27245 . If we have excluded all the directory authorities, we will not
27246 even try to upload our descriptor if we're a relay.
27247 . Do not honor .exit requests to an excluded node.
27248 - Remove a misfeature that caused us to ignore the Fast/Stable flags
27249 when ExitNodes is set. Bugfix on 0.2.2.7-alpha.
27250 - When the set of permitted nodes changes, we now remove any mappings
27251 introduced via TrackExitHosts to now-excluded nodes. Bugfix on
27253 - We never cannibalize a circuit that had excluded nodes on it, even
27254 if StrictNodes is 0. Bugfix on 0.1.0.1-rc.
27255 - Revert a change where we would be laxer about attaching streams to
27256 circuits than when building the circuits. This was meant to prevent
27257 a set of bugs where streams were never attachable, but our improved
27258 code here should make this unnecessary. Bugfix on 0.2.2.7-alpha.
27259 - Keep track of how many times we launch a new circuit to handle a
27260 given stream. Too many launches could indicate an inconsistency
27261 between our "launch a circuit to handle this stream" logic and our
27262 "attach this stream to one of the available circuits" logic.
27263 - Improve log messages related to excluded nodes.
27266 - Fix a spurious warning when moving from a short month to a long
27267 month on relays with month-based BandwidthAccounting. Bugfix on
27268 0.2.2.17-alpha; fixes bug 3020.
27269 - When a client finds that an origin circuit has run out of 16-bit
27270 stream IDs, we now mark it as unusable for new streams. Previously,
27271 we would try to close the entire circuit. Bugfix on 0.0.6.
27272 - Add a forgotten cast that caused a compile warning on OS X 10.6.
27273 Bugfix on 0.2.2.24-alpha.
27274 - Be more careful about reporting the correct error from a failed
27275 connect() system call. Under some circumstances, it was possible to
27276 look at an incorrect value for errno when sending the end reason.
27277 Bugfix on 0.1.0.1-rc.
27278 - Correctly handle an "impossible" overflow cases in connection byte
27279 counting, where we write or read more than 4GB on an edge connection
27280 in a single second. Bugfix on 0.1.2.8-beta.
27281 - Correct the warning displayed when a rendezvous descriptor exceeds
27282 the maximum size. Fixes bug 2750; bugfix on 0.2.1.5-alpha. Found by
27284 - Clients and hidden services now use HSDir-flagged relays for hidden
27285 service descriptor downloads and uploads even if the relays have no
27286 DirPort set and the client has disabled TunnelDirConns. This will
27287 eventually allow us to give the HSDir flag to relays with no
27288 DirPort. Fixes bug 2722; bugfix on 0.2.1.6-alpha.
27289 - Downgrade "no current certificates known for authority" message from
27290 Notice to Info. Fixes bug 2899; bugfix on 0.2.0.10-alpha.
27291 - Make the SIGNAL DUMP control-port command work on FreeBSD. Fixes bug
27292 2917. Bugfix on 0.1.1.1-alpha.
27293 - Only limit the lengths of single HS descriptors, even when multiple
27294 HS descriptors are published to an HSDir relay in a single POST
27295 operation. Fixes bug 2948; bugfix on 0.2.1.5-alpha. Found by hsdir.
27296 - Write the current time into the LastWritten line in our state file,
27297 rather than the time from the previous write attempt. Also, stop
27298 trying to use a time of -1 in our log statements. Fixes bug 3039;
27299 bugfix on 0.2.2.14-alpha.
27300 - Be more consistent in our treatment of file system paths. "~" should
27301 get expanded to the user's home directory in the Log config option.
27302 Fixes bug 2971; bugfix on 0.2.0.1-alpha, which introduced the
27303 feature for the -f and --DataDirectory options.
27306 - Make sure every relay writes a state file at least every 12 hours.
27307 Previously, a relay could go for weeks without writing its state
27308 file, and on a crash could lose its bandwidth history, capacity
27309 estimates, client country statistics, and so on. Addresses bug 3012.
27310 - Send END_STREAM_REASON_NOROUTE in response to EHOSTUNREACH errors.
27311 Clients before 0.2.1.27 didn't handle NOROUTE correctly, but such
27312 clients are already deprecated because of security bugs.
27313 - Don't allow v0 hidden service authorities to act as clients.
27314 Required by fix for bug 3000.
27315 - Ignore SIGNAL NEWNYM commands on relay-only Tor instances. Required
27316 by fix for bug 3000.
27317 - Ensure that no empty [dirreq-](read|write)-history lines are added
27318 to an extrainfo document. Implements ticket 2497.
27320 o Code simplification and refactoring:
27321 - Remove workaround code to handle directory responses from servers
27322 that had bug 539 (they would send HTTP status 503 responses _and_
27323 send a body too). Since only server versions before
27324 0.2.0.16-alpha/0.1.2.19 were affected, there is no longer reason to
27325 keep the workaround in place.
27326 - Remove the old 'fuzzy time' logic. It was supposed to be used for
27327 handling calculations where we have a known amount of clock skew and
27328 an allowed amount of unknown skew. But we only used it in three
27329 places, and we never adjusted the known/unknown skew values. This is
27330 still something we might want to do someday, but if we do, we'll
27331 want to do it differently.
27332 - Avoid signed/unsigned comparisons by making SIZE_T_CEILING unsigned.
27333 None of the cases where we did this before were wrong, but by making
27334 this change we avoid warnings. Fixes bug 2475; bugfix on 0.2.1.28.
27335 - Use GetTempDir to find the proper temporary directory location on
27336 Windows when generating temporary files for the unit tests. Patch by
27340 Changes in version 0.2.2.24-alpha - 2011-04-08
27341 Tor 0.2.2.24-alpha fixes a variety of bugs, including a big bug that
27342 prevented Tor clients from effectively using "multihomed" bridges,
27343 that is, bridges that listen on multiple ports or IP addresses so users
27344 can continue to use some of their addresses even if others get blocked.
27347 - Fix a bug where bridge users who configure the non-canonical
27348 address of a bridge automatically switch to its canonical
27349 address. If a bridge listens at more than one address, it should be
27350 able to advertise those addresses independently and any non-blocked
27351 addresses should continue to work. Bugfix on Tor 0.2.0.x. Fixes
27353 - If you configured Tor to use bridge A, and then quit and
27354 configured Tor to use bridge B instead, it would happily continue
27355 to use bridge A if it's still reachable. While this behavior is
27356 a feature if your goal is connectivity, in some scenarios it's a
27357 dangerous bug. Bugfix on Tor 0.2.0.1-alpha; fixes bug 2511.
27358 - Directory authorities now use data collected from their own
27359 uptime observations when choosing whether to assign the HSDir flag
27360 to relays, instead of trusting the uptime value the relay reports in
27361 its descriptor. This change helps prevent an attack where a small
27362 set of nodes with frequently-changing identity keys can blackhole
27363 a hidden service. (Only authorities need upgrade; others will be
27364 fine once they do.) Bugfix on 0.2.0.10-alpha; fixes bug 2709.
27367 - When we restart our relay, we might get a successful connection
27368 from the outside before we've started our reachability tests,
27369 triggering a warning: "ORPort found reachable, but I have no
27370 routerinfo yet. Failing to inform controller of success." This
27371 bug was harmless unless Tor is running under a controller
27372 like Vidalia, in which case the controller would never get a
27373 REACHABILITY_SUCCEEDED status event. Bugfix on 0.1.2.6-alpha;
27375 - Make directory authorities more accurate at recording when
27376 relays that have failed several reachability tests became
27377 unreachable, so we can provide more accuracy at assigning Stable,
27378 Guard, HSDir, etc flags. Bugfix on 0.2.0.6-alpha. Resolves bug 2716.
27379 - Fix an issue that prevented static linking of libevent on
27380 some platforms (notably Linux). Fixes bug 2698; bugfix on
27381 versions 0.2.1.23/0.2.2.8-alpha (the versions introducing
27382 the --with-static-libevent configure option).
27383 - We now ask the other side of a stream (the client or the exit)
27384 for more data on that stream when the amount of queued data on
27385 that stream dips low enough. Previously, we wouldn't ask the
27386 other side for more data until either it sent us more data (which
27387 it wasn't supposed to do if it had exhausted its window!) or we
27388 had completely flushed all our queued data. This flow control fix
27389 should improve throughput. Fixes bug 2756; bugfix on the earliest
27390 released versions of Tor (svn commit r152).
27391 - Avoid a double-mark-for-free warning when failing to attach a
27392 transparent proxy connection. (We thought we had fixed this in
27393 0.2.2.23-alpha, but it turns out our fix was checking the wrong
27394 connection.) Fixes bug 2757; bugfix on 0.1.2.1-alpha (the original
27395 bug) and 0.2.2.23-alpha (the incorrect fix).
27396 - When warning about missing zlib development packages during compile,
27397 give the correct package names. Bugfix on 0.2.0.1-alpha.
27400 - Directory authorities now log the source of a rejected POSTed v3
27401 networkstatus vote.
27402 - Make compilation with clang possible when using
27403 --enable-gcc-warnings by removing two warning options that clang
27404 hasn't implemented yet and by fixing a few warnings. Implements
27406 - When expiring circuits, use microsecond timers rather than
27407 one-second timers. This can avoid an unpleasant situation where a
27408 circuit is launched near the end of one second and expired right
27409 near the beginning of the next, and prevent fluctuations in circuit
27411 - Use computed circuit-build timeouts to decide when to launch
27412 parallel introduction circuits for hidden services. (Previously,
27413 we would retry after 15 seconds.)
27414 - Update to the April 1 2011 Maxmind GeoLite Country database.
27417 - Create the /var/run/tor directory on startup on OpenSUSE if it is
27418 not already created. Patch from Andreas Stieger. Fixes bug 2573.
27420 o Documentation changes:
27421 - Modernize the doxygen configuration file slightly. Fixes bug 2707.
27422 - Resolve all doxygen warnings except those for missing documentation.
27424 - Add doxygen documentation for more functions, fields, and types.
27427 Changes in version 0.2.2.23-alpha - 2011-03-08
27428 Tor 0.2.2.23-alpha lets relays record their bandwidth history so when
27429 they restart they don't lose their bandwidth capacity estimate. This
27430 release also fixes a diverse set of user-facing bugs, ranging from
27431 relays overrunning their rate limiting to clients falsely warning about
27432 clock skew to bridge descriptor leaks by our bridge directory authority.
27435 - Stop sending a CLOCK_SKEW controller status event whenever
27436 we fetch directory information from a relay that has a wrong clock.
27437 Instead, only inform the controller when it's a trusted authority
27438 that claims our clock is wrong. Bugfix on 0.1.2.6-alpha; fixes
27439 the rest of bug 1074.
27440 - Fix an assert in parsing router descriptors containing IPv6
27441 addresses. This one took down the directory authorities when
27442 somebody tried some experimental code. Bugfix on 0.2.1.3-alpha.
27443 - Make the bridge directory authority refuse to answer directory
27444 requests for "all" descriptors. It used to include bridge
27445 descriptors in its answer, which was a major information leak.
27446 Found by "piebeer". Bugfix on 0.2.0.3-alpha.
27447 - If relays set RelayBandwidthBurst but not RelayBandwidthRate,
27448 Tor would ignore their RelayBandwidthBurst setting,
27449 potentially using more bandwidth than expected. Bugfix on
27450 0.2.0.1-alpha. Reported by Paul Wouters. Fixes bug 2470.
27451 - Ignore and warn if the user mistakenly sets "PublishServerDescriptor
27452 hidserv" in her torrc. The 'hidserv' argument never controlled
27453 publication of hidden service descriptors. Bugfix on 0.2.0.1-alpha.
27456 - Relays now save observed peak bandwidth throughput rates to their
27457 state file (along with total usage, which was already saved)
27458 so that they can determine their correct estimated bandwidth on
27459 restart. Resolves bug 1863, where Tor relays would reset their
27460 estimated bandwidth to 0 after restarting.
27461 - Directory authorities now take changes in router IP address and
27462 ORPort into account when determining router stability. Previously,
27463 if a router changed its IP or ORPort, the authorities would not
27464 treat it as having any downtime for the purposes of stability
27465 calculation, whereas clients would experience downtime since the
27466 change could take a while to propagate to them. Resolves issue 1035.
27467 - Enable Address Space Layout Randomization (ASLR) and Data Execution
27468 Prevention (DEP) by default on Windows to make it harder for
27469 attackers to exploit vulnerabilities. Patch from John Brooks.
27471 o Minor bugfixes (on 0.2.1.x and earlier):
27472 - Fix a rare crash bug that could occur when a client was configured
27473 with a large number of bridges. Fixes bug 2629; bugfix on
27474 0.2.1.2-alpha. Bugfix by trac user "shitlei".
27475 - Avoid a double mark-for-free warning when failing to attach a
27476 transparent proxy connection. Bugfix on 0.1.2.1-alpha. Fixes
27478 - Correctly detect failure to allocate an OpenSSL BIO. Fixes bug 2378;
27479 found by "cypherpunks". This bug was introduced before the first
27480 Tor release, in svn commit r110.
27481 - Country codes aren't supported in EntryNodes until 0.2.3.x, so
27482 don't mention them in the manpage. Fixes bug 2450; issue
27483 spotted by keb and G-Lo.
27484 - Fix a bug in bandwidth history state parsing that could have been
27485 triggered if a future version of Tor ever changed the timing
27486 granularity at which bandwidth history is measured. Bugfix on
27487 Tor 0.1.1.11-alpha.
27488 - When a relay decides that its DNS is too broken for it to serve
27489 as an exit server, it advertised itself as a non-exit, but
27490 continued to act as an exit. This could create accidental
27491 partitioning opportunities for users. Instead, if a relay is
27492 going to advertise reject *:* as its exit policy, it should
27493 really act with exit policy "reject *:*". Fixes bug 2366.
27494 Bugfix on Tor 0.1.2.5-alpha. Bugfix by user "postman" on trac.
27495 - In the special case where you configure a public exit relay as your
27496 bridge, Tor would be willing to use that exit relay as the last
27497 hop in your circuit as well. Now we fail that circuit instead.
27498 Bugfix on 0.2.0.12-alpha. Fixes bug 2403. Reported by "piebeer".
27499 - Fix a bug with our locking implementation on Windows that couldn't
27500 correctly detect when a file was already locked. Fixes bug 2504,
27501 bugfix on 0.2.1.6-alpha.
27502 - Fix IPv6-related connect() failures on some platforms (BSD, OS X).
27503 Bugfix on 0.2.0.3-alpha; fixes first part of bug 2660. Patch by
27505 - Set target port in get_interface_address6() correctly. Bugfix
27506 on 0.1.1.4-alpha and 0.2.0.3-alpha; fixes second part of bug 2660.
27507 - Directory authorities are now more robust to hops back in time
27508 when calculating router stability. Previously, if a run of uptime
27509 or downtime appeared to be negative, the calculation could give
27510 incorrect results. Bugfix on 0.2.0.6-alpha; noticed when fixing
27512 - Fix an assert that got triggered when using the TestingTorNetwork
27513 configuration option and then issuing a GETINFO config-text control
27514 command. Fixes bug 2250; bugfix on 0.2.1.2-alpha.
27516 o Minor bugfixes (on 0.2.2.x):
27517 - Clients should not weight BadExit nodes as Exits in their node
27518 selection. Similarly, directory authorities should not count BadExit
27519 bandwidth as Exit bandwidth when computing bandwidth-weights.
27520 Bugfix on 0.2.2.10-alpha; fixes bug 2203.
27521 - Correctly clear our dir_read/dir_write history when there is an
27522 error parsing any bw history value from the state file. Bugfix on
27523 Tor 0.2.2.15-alpha.
27524 - Resolve a bug in verifying signatures of directory objects
27525 with digests longer than SHA1. Bugfix on 0.2.2.20-alpha.
27526 Fixes bug 2409. Found by "piebeer".
27527 - Bridge authorities no longer crash on SIGHUP when they try to
27528 publish their relay descriptor to themselves. Fixes bug 2572. Bugfix
27532 - Log less aggressively about circuit timeout changes, and improve
27533 some other circuit timeout messages. Resolves bug 2004.
27534 - Log a little more clearly about the times at which we're no longer
27535 accepting new connections. Resolves bug 2181.
27536 - Reject attempts at the client side to open connections to private
27537 IP addresses (like 127.0.0.1, 10.0.0.1, and so on) with
27538 a randomly chosen exit node. Attempts to do so are always
27539 ill-defined, generally prevented by exit policies, and usually
27540 in error. This will also help to detect loops in transparent
27541 proxy configurations. You can disable this feature by setting
27542 "ClientRejectInternalAddresses 0" in your torrc.
27543 - Always treat failure to allocate an RSA key as an unrecoverable
27545 - Update to the March 1 2011 Maxmind GeoLite Country database.
27547 o Minor features (log subsystem):
27548 - Add documentation for configuring logging at different severities in
27549 different log domains. We've had this feature since 0.2.1.1-alpha,
27550 but for some reason it never made it into the manpage. Fixes
27552 - Make it simpler to specify "All log domains except for A and B".
27553 Previously you needed to say "[*,~A,~B]". Now you can just say
27555 - Add a "LogMessageDomains 1" option to include the domains of log
27556 messages along with the messages. Without this, there's no way
27557 to use log domains without reading the source or doing a lot
27560 o Packaging changes:
27561 - Stop shipping the Tor specs files and development proposal documents
27562 in the tarball. They are now in a separate git repository at
27563 git://git.torproject.org/torspec.git
27566 Changes in version 0.2.1.30 - 2011-02-23
27567 Tor 0.2.1.30 fixes a variety of less critical bugs. The main other
27568 change is a slight tweak to Tor's TLS handshake that makes relays
27569 and bridges that run this new version reachable from Iran again.
27570 We don't expect this tweak will win the arms race long-term, but it
27571 buys us time until we roll out a better solution.
27574 - Stop sending a CLOCK_SKEW controller status event whenever
27575 we fetch directory information from a relay that has a wrong clock.
27576 Instead, only inform the controller when it's a trusted authority
27577 that claims our clock is wrong. Bugfix on 0.1.2.6-alpha; fixes
27578 the rest of bug 1074.
27579 - Fix a bounds-checking error that could allow an attacker to
27580 remotely crash a directory authority. Bugfix on 0.2.1.5-alpha.
27581 Found by "piebeer".
27582 - If relays set RelayBandwidthBurst but not RelayBandwidthRate,
27583 Tor would ignore their RelayBandwidthBurst setting,
27584 potentially using more bandwidth than expected. Bugfix on
27585 0.2.0.1-alpha. Reported by Paul Wouters. Fixes bug 2470.
27586 - Ignore and warn if the user mistakenly sets "PublishServerDescriptor
27587 hidserv" in her torrc. The 'hidserv' argument never controlled
27588 publication of hidden service descriptors. Bugfix on 0.2.0.1-alpha.
27591 - Adjust our TLS Diffie-Hellman parameters to match those used by
27593 - Update to the February 1 2011 Maxmind GeoLite Country database.
27596 - Check for and reject overly long directory certificates and
27597 directory tokens before they have a chance to hit any assertions.
27598 Bugfix on 0.2.1.28. Found by "doorss".
27599 - Bring the logic that gathers routerinfos and assesses the
27600 acceptability of circuits into line. This prevents a Tor OP from
27601 getting locked in a cycle of choosing its local OR as an exit for a
27602 path (due to a .exit request) and then rejecting the circuit because
27603 its OR is not listed yet. It also prevents Tor clients from using an
27604 OR running in the same instance as an exit (due to a .exit request)
27605 if the OR does not meet the same requirements expected of an OR
27606 running elsewhere. Fixes bug 1859; bugfix on 0.1.0.1-rc.
27608 o Packaging changes:
27609 - Stop shipping the Tor specs files and development proposal documents
27610 in the tarball. They are now in a separate git repository at
27611 git://git.torproject.org/torspec.git
27612 - Do not include Git version tags as though they are SVN tags when
27613 generating a tarball from inside a repository that has switched
27614 between branches. Bugfix on 0.2.1.15-rc; fixes bug 2402.
27617 Changes in version 0.2.2.22-alpha - 2011-01-25
27618 Tor 0.2.2.22-alpha fixes a few more less-critical security issues. The
27619 main other change is a slight tweak to Tor's TLS handshake that makes
27620 relays and bridges that run this new version reachable from Iran again.
27621 We don't expect this tweak will win the arms race long-term, but it
27622 will buy us a bit more time until we roll out a better solution.
27625 - Fix a bounds-checking error that could allow an attacker to
27626 remotely crash a directory authority. Bugfix on 0.2.1.5-alpha.
27627 Found by "piebeer".
27628 - Don't assert when changing from bridge to relay or vice versa
27629 via the controller. The assert happened because we didn't properly
27630 initialize our keys in this case. Bugfix on 0.2.2.18-alpha; fixes
27631 bug 2433. Reported by bastik.
27634 - Adjust our TLS Diffie-Hellman parameters to match those used by
27636 - Provide a log message stating which geoip file we're parsing
27637 instead of just stating that we're parsing the geoip file.
27638 Implements ticket 2432.
27641 - Check for and reject overly long directory certificates and
27642 directory tokens before they have a chance to hit any assertions.
27643 Bugfix on 0.2.1.28 / 0.2.2.20-alpha. Found by "doorss".
27646 Changes in version 0.2.2.21-alpha - 2011-01-15
27647 Tor 0.2.2.21-alpha includes all the patches from Tor 0.2.1.29, which
27648 continues our recent code security audit work. The main fix resolves
27649 a remote heap overflow vulnerability that can allow remote code
27650 execution (CVE-2011-0427). Other fixes address a variety of assert
27651 and crash bugs, most of which we think are hard to exploit remotely.
27653 o Major bugfixes (security), also included in 0.2.1.29:
27654 - Fix a heap overflow bug where an adversary could cause heap
27655 corruption. This bug probably allows remote code execution
27656 attacks. Reported by "debuger". Fixes CVE-2011-0427. Bugfix on
27658 - Prevent a denial-of-service attack by disallowing any
27659 zlib-compressed data whose compression factor is implausibly
27660 high. Fixes part of bug 2324; reported by "doorss".
27661 - Zero out a few more keys in memory before freeing them. Fixes
27662 bug 2384 and part of bug 2385. These key instances found by
27663 "cypherpunks", based on Andrew Case's report about being able
27664 to find sensitive data in Tor's memory space if you have enough
27665 permissions. Bugfix on 0.0.2pre9.
27667 o Major bugfixes (crashes), also included in 0.2.1.29:
27668 - Prevent calls to Libevent from inside Libevent log handlers.
27669 This had potential to cause a nasty set of crashes, especially
27670 if running Libevent with debug logging enabled, and running
27671 Tor with a controller watching for low-severity log messages.
27672 Bugfix on 0.1.0.2-rc. Fixes bug 2190.
27673 - Add a check for SIZE_T_MAX to tor_realloc() to try to avoid
27674 underflow errors there too. Fixes the other part of bug 2324.
27675 - Fix a bug where we would assert if we ever had a
27676 cached-descriptors.new file (or another file read directly into
27677 memory) of exactly SIZE_T_CEILING bytes. Fixes bug 2326; bugfix
27678 on 0.2.1.25. Found by doorss.
27679 - Fix some potential asserts and parsing issues with grossly
27680 malformed router caches. Fixes bug 2352; bugfix on Tor 0.2.1.27.
27683 o Minor bugfixes (other), also included in 0.2.1.29:
27684 - Fix a bug with handling misformed replies to reverse DNS lookup
27685 requests in DNSPort. Bugfix on Tor 0.2.0.1-alpha. Related to a
27686 bug reported by doorss.
27687 - Fix compilation on mingw when a pthreads compatibility library
27688 has been installed. (We don't want to use it, so we shouldn't
27689 be including pthread.h.) Fixes bug 2313; bugfix on 0.1.0.1-rc.
27690 - Fix a bug where we would declare that we had run out of virtual
27691 addresses when the address space was only half-exhausted. Bugfix
27693 - Correctly handle the case where AutomapHostsOnResolve is set but
27694 no virtual addresses are available. Fixes bug 2328; bugfix on
27695 0.1.2.1-alpha. Bug found by doorss.
27696 - Correctly handle wrapping around when we run out of virtual
27697 address space. Found by cypherpunks; bugfix on 0.2.0.5-alpha.
27699 o Minor features, also included in 0.2.1.29:
27700 - Update to the January 1 2011 Maxmind GeoLite Country database.
27701 - Introduce output size checks on all of our decryption functions.
27703 o Build changes, also included in 0.2.1.29:
27704 - Tor does not build packages correctly with Automake 1.6 and earlier;
27705 added a check to Makefile.am to make sure that we're building with
27706 Automake 1.7 or later.
27707 - The 0.2.1.28 tarball was missing src/common/OpenBSD_malloc_Linux.c
27708 because we built it with a too-old version of automake. Thus that
27709 release broke ./configure --enable-openbsd-malloc, which is popular
27710 among really fast exit relays on Linux.
27712 o Major bugfixes, new in 0.2.2.21-alpha:
27713 - Prevent crash/heap corruption when the cbtnummodes consensus
27714 parameter is set to 0 or large values. Fixes bug 2317; bugfix
27717 o Major features, new in 0.2.2.21-alpha:
27718 - Introduce minimum/maximum values that clients will believe
27719 from the consensus. Now we'll have a better chance to avoid crashes
27720 or worse when a consensus param has a weird value.
27722 o Minor features, new in 0.2.2.21-alpha:
27723 - Make sure to disable DirPort if running as a bridge. DirPorts aren't
27724 used on bridges, and it makes bridge scanning somewhat easier.
27725 - If writing the state file to disk fails, wait up to an hour before
27726 retrying again, rather than trying again each second. Fixes bug
27727 2346; bugfix on Tor 0.1.1.3-alpha.
27728 - Make Libevent log messages get delivered to controllers later,
27729 and not from inside the Libevent log handler. This prevents unsafe
27730 reentrant Libevent calls while still letting the log messages
27732 - Detect platforms that brokenly use a signed size_t, and refuse to
27733 build there. Found and analyzed by doorss and rransom.
27734 - Fix a bunch of compile warnings revealed by mingw with gcc 4.5.
27737 o Minor bugfixes, new in 0.2.2.21-alpha:
27738 - Handle SOCKS messages longer than 128 bytes long correctly, rather
27739 than waiting forever for them to finish. Fixes bug 2330; bugfix
27740 on 0.2.0.16-alpha. Found by doorss.
27741 - Add assertions to check for overflow in arguments to
27742 base32_encode() and base32_decode(); fix a signed-unsigned
27743 comparison there too. These bugs are not actually reachable in Tor,
27744 but it's good to prevent future errors too. Found by doorss.
27745 - Correctly detect failures to create DNS requests when using Libevent
27746 versions before v2. (Before Libevent 2, we used our own evdns
27747 implementation. Its return values for Libevent's evdns_resolve_*()
27748 functions are not consistent with those from Libevent.) Fixes bug
27749 2363; bugfix on 0.2.2.6-alpha. Found by "lodger".
27751 o Documentation, new in 0.2.2.21-alpha:
27752 - Document the default socks host and port (127.0.0.1:9050) for
27756 Changes in version 0.2.1.29 - 2011-01-15
27757 Tor 0.2.1.29 continues our recent code security audit work. The main
27758 fix resolves a remote heap overflow vulnerability that can allow remote
27759 code execution. Other fixes address a variety of assert and crash bugs,
27760 most of which we think are hard to exploit remotely.
27762 o Major bugfixes (security):
27763 - Fix a heap overflow bug where an adversary could cause heap
27764 corruption. This bug probably allows remote code execution
27765 attacks. Reported by "debuger". Fixes CVE-2011-0427. Bugfix on
27767 - Prevent a denial-of-service attack by disallowing any
27768 zlib-compressed data whose compression factor is implausibly
27769 high. Fixes part of bug 2324; reported by "doorss".
27770 - Zero out a few more keys in memory before freeing them. Fixes
27771 bug 2384 and part of bug 2385. These key instances found by
27772 "cypherpunks", based on Andrew Case's report about being able
27773 to find sensitive data in Tor's memory space if you have enough
27774 permissions. Bugfix on 0.0.2pre9.
27776 o Major bugfixes (crashes):
27777 - Prevent calls to Libevent from inside Libevent log handlers.
27778 This had potential to cause a nasty set of crashes, especially
27779 if running Libevent with debug logging enabled, and running
27780 Tor with a controller watching for low-severity log messages.
27781 Bugfix on 0.1.0.2-rc. Fixes bug 2190.
27782 - Add a check for SIZE_T_MAX to tor_realloc() to try to avoid
27783 underflow errors there too. Fixes the other part of bug 2324.
27784 - Fix a bug where we would assert if we ever had a
27785 cached-descriptors.new file (or another file read directly into
27786 memory) of exactly SIZE_T_CEILING bytes. Fixes bug 2326; bugfix
27787 on 0.2.1.25. Found by doorss.
27788 - Fix some potential asserts and parsing issues with grossly
27789 malformed router caches. Fixes bug 2352; bugfix on Tor 0.2.1.27.
27792 o Minor bugfixes (other):
27793 - Fix a bug with handling misformed replies to reverse DNS lookup
27794 requests in DNSPort. Bugfix on Tor 0.2.0.1-alpha. Related to a
27795 bug reported by doorss.
27796 - Fix compilation on mingw when a pthreads compatibility library
27797 has been installed. (We don't want to use it, so we shouldn't
27798 be including pthread.h.) Fixes bug 2313; bugfix on 0.1.0.1-rc.
27799 - Fix a bug where we would declare that we had run out of virtual
27800 addresses when the address space was only half-exhausted. Bugfix
27802 - Correctly handle the case where AutomapHostsOnResolve is set but
27803 no virtual addresses are available. Fixes bug 2328; bugfix on
27804 0.1.2.1-alpha. Bug found by doorss.
27805 - Correctly handle wrapping around to when we run out of virtual
27806 address space. Found by cypherpunks, bugfix on 0.2.0.5-alpha.
27807 - The 0.2.1.28 tarball was missing src/common/OpenBSD_malloc_Linux.c
27808 because we built it with a too-old version of automake. Thus that
27809 release broke ./configure --enable-openbsd-malloc, which is popular
27810 among really fast exit relays on Linux.
27813 - Update to the January 1 2011 Maxmind GeoLite Country database.
27814 - Introduce output size checks on all of our decryption functions.
27817 - Tor does not build packages correctly with Automake 1.6 and earlier;
27818 added a check to Makefile.am to make sure that we're building with
27819 Automake 1.7 or later.
27822 Changes in version 0.2.2.20-alpha - 2010-12-17
27823 Tor 0.2.2.20-alpha does some code cleanup to reduce the risk of remotely
27824 exploitable bugs. We also fix a variety of other significant bugs,
27825 change the IP address for one of our directory authorities, and update
27826 the minimum version that Tor relays must run to join the network.
27829 - Fix a remotely exploitable bug that could be used to crash instances
27830 of Tor remotely by overflowing on the heap. Remote-code execution
27831 hasn't been confirmed, but can't be ruled out. Everyone should
27832 upgrade. Bugfix on the 0.1.1 series and later.
27833 - Fix a bug that could break accounting on 64-bit systems with large
27834 time_t values, making them hibernate for impossibly long intervals.
27835 Fixes bug 2146. Bugfix on 0.0.9pre6; fix by boboper.
27836 - Fix a logic error in directory_fetches_from_authorities() that
27837 would cause all _non_-exits refusing single-hop-like circuits
27838 to fetch from authorities, when we wanted to have _exits_ fetch
27839 from authorities. Fixes more of 2097. Bugfix on 0.2.2.16-alpha;
27841 - Fix a stream fairness bug that would cause newer streams on a given
27842 circuit to get preference when reading bytes from the origin or
27843 destination. Fixes bug 2210. Fix by Mashael AlSabah. This bug was
27844 introduced before the first Tor release, in svn revision r152.
27846 o Directory authority changes:
27847 - Change IP address and ports for gabelmoo (v3 directory authority).
27850 - Avoid crashes when AccountingMax is set on clients. Fixes bug 2235.
27851 Bugfix on 0.2.2.18-alpha. Diagnosed by boboper.
27852 - Fix an off-by-one error in calculating some controller command
27853 argument lengths. Fortunately, this mistake is harmless since
27854 the controller code does redundant NUL termination too. Found by
27855 boboper. Bugfix on 0.1.1.1-alpha.
27856 - Do not dereference NULL if a bridge fails to build its
27857 extra-info descriptor. Found by an anonymous commenter on
27858 Trac. Bugfix on 0.2.2.19-alpha.
27861 - Update to the December 1 2010 Maxmind GeoLite Country database.
27862 - Directory authorities now reject relays running any versions of
27863 Tor between 0.2.1.3-alpha and 0.2.1.18 inclusive; they have
27864 known bugs that keep RELAY_EARLY cells from working on rendezvous
27865 circuits. Followup to fix for bug 2081.
27866 - Directory authorities now reject relays running any version of Tor
27867 older than 0.2.0.26-rc. That version is the earliest that fetches
27868 current directory information correctly. Fixes bug 2156.
27869 - Report only the top 10 ports in exit-port stats in order not to
27870 exceed the maximum extra-info descriptor length of 50 KB. Implements
27874 Changes in version 0.2.1.28 - 2010-12-17
27875 Tor 0.2.1.28 does some code cleanup to reduce the risk of remotely
27876 exploitable bugs. We also took this opportunity to change the IP address
27877 for one of our directory authorities, and to update the geoip database
27881 - Fix a remotely exploitable bug that could be used to crash instances
27882 of Tor remotely by overflowing on the heap. Remote-code execution
27883 hasn't been confirmed, but can't be ruled out. Everyone should
27884 upgrade. Bugfix on the 0.1.1 series and later.
27886 o Directory authority changes:
27887 - Change IP address and ports for gabelmoo (v3 directory authority).
27890 - Update to the December 1 2010 Maxmind GeoLite Country database.
27893 Changes in version 0.2.1.27 - 2010-11-23
27894 Yet another OpenSSL security patch broke its compatibility with Tor:
27895 Tor 0.2.1.27 makes relays work with openssl 0.9.8p and 1.0.0.b. We
27896 also took this opportunity to fix several crash bugs, integrate a new
27897 directory authority, and update the bundled GeoIP database.
27900 - Resolve an incompatibility with OpenSSL 0.9.8p and OpenSSL 1.0.0b:
27901 No longer set the tlsext_host_name extension on server SSL objects;
27902 but continue to set it on client SSL objects. Our goal in setting
27903 it was to imitate a browser, not a vhosting server. Fixes bug 2204;
27904 bugfix on 0.2.1.1-alpha.
27905 - Do not log messages to the controller while shrinking buffer
27906 freelists. Doing so would sometimes make the controller connection
27907 try to allocate a buffer chunk, which would mess up the internals
27908 of the freelist and cause an assertion failure. Fixes bug 1125;
27909 fixed by Robert Ransom. Bugfix on 0.2.0.16-alpha.
27910 - Learn our external IP address when we're a relay or bridge, even if
27911 we set PublishServerDescriptor to 0. Bugfix on 0.2.0.3-alpha,
27912 where we introduced bridge relays that don't need to publish to
27913 be useful. Fixes bug 2050.
27914 - Do even more to reject (and not just ignore) annotations on
27915 router descriptors received anywhere but from the cache. Previously
27916 we would ignore such annotations at first, but cache them to disk
27917 anyway. Bugfix on 0.2.0.8-alpha. Found by piebeer.
27918 - When you're using bridges and your network goes away and your
27919 bridges get marked as down, recover when you attempt a new socks
27920 connection (if the network is back), rather than waiting up to an
27921 hour to try fetching new descriptors for your bridges. Bugfix on
27922 0.2.0.3-alpha; fixes bug 1981.
27925 - Move to the November 2010 Maxmind GeoLite country db (rather
27926 than the June 2009 ip-to-country GeoIP db) for our statistics that
27927 count how many users relays are seeing from each country. Now we'll
27928 have more accurate data, especially for many African countries.
27930 o New directory authorities:
27931 - Set up maatuska (run by Linus Nordberg) as the eighth v3 directory
27935 - Fix an assertion failure that could occur in directory caches or
27936 bridge users when using a very short voting interval on a testing
27937 network. Diagnosed by Robert Hogan. Fixes bug 1141; bugfix on
27939 - Enforce multiplicity rules when parsing annotations. Bugfix on
27940 0.2.0.8-alpha. Found by piebeer.
27941 - Allow handshaking OR connections to take a full KeepalivePeriod
27942 seconds to handshake. Previously, we would close them after
27943 IDLE_OR_CONN_TIMEOUT (180) seconds, the same timeout as if they
27944 were open. Bugfix on 0.2.1.26; fixes bug 1840. Thanks to mingw-san
27946 - When building with --enable-gcc-warnings on OpenBSD, disable
27947 warnings in system headers. This makes --enable-gcc-warnings
27948 pass on OpenBSD 4.8.
27951 - Exit nodes didn't recognize EHOSTUNREACH as a plausible error code,
27952 and so sent back END_STREAM_REASON_MISC. Clients now recognize a new
27953 stream ending reason for this case: END_STREAM_REASON_NOROUTE.
27954 Servers can start sending this code when enough clients recognize
27955 it. Bugfix on 0.1.0.1-rc; fixes part of bug 1793.
27956 - Build correctly on mingw with more recent versions of OpenSSL 0.9.8.
27957 Patch from mingw-san.
27960 - Remove the old debian/ directory from the main Tor distribution.
27961 The official Tor-for-debian git repository lives at the URL
27962 https://git.torproject.org/debian/tor.git
27963 - Stop shipping the old doc/website/ directory in the tarball. We
27964 changed the website format in late 2010, and what we shipped in
27965 0.2.1.26 really wasn't that useful anyway.
27968 Changes in version 0.2.2.19-alpha - 2010-11-22
27969 Yet another OpenSSL security patch broke its compatibility with Tor:
27970 Tor 0.2.2.19-alpha makes relays work with OpenSSL 0.9.8p and 1.0.0.b.
27973 - Resolve an incompatibility with OpenSSL 0.9.8p and OpenSSL 1.0.0b:
27974 No longer set the tlsext_host_name extension on server SSL objects;
27975 but continue to set it on client SSL objects. Our goal in setting
27976 it was to imitate a browser, not a vhosting server. Fixes bug 2204;
27977 bugfix on 0.2.1.1-alpha.
27980 - Try harder not to exceed the maximum length of 50 KB when writing
27981 statistics to extra-info descriptors. This bug was triggered by very
27982 fast relays reporting exit-port, entry, and dirreq statistics.
27983 Reported by Olaf Selke. Bugfix on 0.2.2.1-alpha. Fixes bug 2183.
27984 - Publish a router descriptor even if generating an extra-info
27985 descriptor fails. Previously we would not publish a router
27986 descriptor without an extra-info descriptor; this can cause fast
27987 exit relays collecting exit-port statistics to drop from the
27988 consensus. Bugfix on 0.1.2.9-rc; fixes bug 2195.
27991 Changes in version 0.2.2.18-alpha - 2010-11-16
27992 Tor 0.2.2.18-alpha fixes several crash bugs that have been nagging
27993 us lately, makes unpublished bridge relays able to detect their IP
27994 address, and fixes a wide variety of other bugs to get us much closer
27995 to a stable release.
27998 - Do even more to reject (and not just ignore) annotations on
27999 router descriptors received anywhere but from the cache. Previously
28000 we would ignore such annotations at first, but cache them to disk
28001 anyway. Bugfix on 0.2.0.8-alpha. Found by piebeer.
28002 - Do not log messages to the controller while shrinking buffer
28003 freelists. Doing so would sometimes make the controller connection
28004 try to allocate a buffer chunk, which would mess up the internals
28005 of the freelist and cause an assertion failure. Fixes bug 1125;
28006 fixed by Robert Ransom. Bugfix on 0.2.0.16-alpha.
28007 - Learn our external IP address when we're a relay or bridge, even if
28008 we set PublishServerDescriptor to 0. Bugfix on 0.2.0.3-alpha,
28009 where we introduced bridge relays that don't need to publish to
28010 be useful. Fixes bug 2050.
28011 - Maintain separate TLS contexts and certificates for incoming and
28012 outgoing connections in bridge relays. Previously we would use the
28013 same TLS contexts and certs for incoming and outgoing connections.
28014 Bugfix on 0.2.0.3-alpha; addresses bug 988.
28015 - Maintain separate identity keys for incoming and outgoing TLS
28016 contexts in bridge relays. Previously we would use the same
28017 identity keys for incoming and outgoing TLS contexts. Bugfix on
28018 0.2.0.3-alpha; addresses the other half of bug 988.
28019 - Avoid an assertion failure when we as an authority receive a
28020 duplicate upload of a router descriptor that we already have,
28021 but which we previously considered an obsolete descriptor.
28022 Fixes another case of bug 1776. Bugfix on 0.2.2.16-alpha.
28023 - Avoid a crash bug triggered by looking at a dangling pointer while
28024 setting the network status consensus. Found by Robert Ransom.
28025 Bugfix on 0.2.2.17-alpha. Fixes bug 2097.
28026 - Fix a logic error where servers that _didn't_ act as exits would
28027 try to keep their server lists more aggressively up to date than
28028 exits, when it was supposed to be the other way around. Bugfix
28031 o Minor bugfixes (on Tor 0.2.1.x and earlier):
28032 - When we're trying to guess whether we know our IP address as
28033 a relay, we would log various ways that we failed to guess
28034 our address, but never log that we ended up guessing it
28035 successfully. Now add a log line to help confused and anxious
28036 relay operators. Bugfix on 0.1.2.1-alpha; fixes bug 1534.
28037 - Bring the logic that gathers routerinfos and assesses the
28038 acceptability of circuits into line. This prevents a Tor OP from
28039 getting locked in a cycle of choosing its local OR as an exit for a
28040 path (due to a .exit request) and then rejecting the circuit because
28041 its OR is not listed yet. It also prevents Tor clients from using an
28042 OR running in the same instance as an exit (due to a .exit request)
28043 if the OR does not meet the same requirements expected of an OR
28044 running elsewhere. Fixes bug 1859; bugfix on 0.1.0.1-rc.
28045 - Correctly describe errors that occur when generating a TLS object.
28046 Previously we would attribute them to a failure while generating a
28047 TLS context. Patch by Robert Ransom. Bugfix on 0.1.0.4-rc; fixes
28049 - Enforce multiplicity rules when parsing annotations. Bugfix on
28050 0.2.0.8-alpha. Found by piebeer.
28051 - Fix warnings that newer versions of autoconf produced during
28052 ./autogen.sh. These warnings appear to be harmless in our case,
28053 but they were extremely verbose. Fixes bug 2020.
28055 o Minor bugfixes (on Tor 0.2.2.x):
28056 - Enable protection of small arrays whenever we build with gcc
28057 hardening features, not only when also building with warnings
28058 enabled. Fixes bug 2031; bugfix on 0.2.2.14-alpha. Reported by keb.
28061 - Make hidden services work better in private Tor networks by not
28062 requiring any uptime to join the hidden service descriptor
28063 DHT. Implements ticket 2088.
28064 - Rate-limit the "your application is giving Tor only an IP address"
28065 warning. Addresses bug 2000; bugfix on 0.0.8pre2.
28066 - When AllowSingleHopExits is set, print a warning to explain to the
28067 relay operator why most clients are avoiding her relay.
28068 - Update to the November 1 2010 Maxmind GeoLite Country database.
28070 o Code simplifications and refactoring:
28071 - When we fixed bug 1038 we had to put in a restriction not to send
28072 RELAY_EARLY cells on rend circuits. This was necessary as long
28073 as relays using Tor 0.2.1.3-alpha through 0.2.1.18-alpha were
28074 active. Now remove this obsolete check. Resolves bug 2081.
28075 - Some options used different conventions for uppercasing of acronyms
28076 when comparing manpage and source. Fix those in favor of the
28077 manpage, as it makes sense to capitalize acronyms.
28078 - Remove the torrc.complete file. It hasn't been kept up to date
28079 and users will have better luck checking out the manpage.
28080 - Remove the obsolete "NoPublish" option; it has been flagged
28081 as obsolete and has produced a warning since 0.1.1.18-rc.
28082 - Remove everything related to building the expert bundle for OS X.
28083 It has confused many users, doesn't work right on OS X 10.6,
28084 and is hard to get rid of once installed. Resolves bug 1274.
28087 Changes in version 0.2.2.17-alpha - 2010-09-30
28088 Tor 0.2.2.17-alpha introduces a feature to make it harder for clients
28089 to use one-hop circuits (which can put the exit relays at higher risk,
28090 plus unbalance the network); fixes a big bug in bandwidth accounting
28091 for relays that want to limit their monthly bandwidth use; fixes a
28092 big pile of bugs in how clients tolerate temporary network failure;
28093 and makes our adaptive circuit build timeout feature (which improves
28094 client performance if your network is fast while not breaking things
28095 if your network is slow) better handle bad networks.
28098 - Exit relays now try harder to block exit attempts from unknown
28099 relays, to make it harder for people to use them as one-hop proxies
28100 a la tortunnel. Controlled by the refuseunknownexits consensus
28101 parameter (currently enabled), or you can override it on your
28102 relay with the RefuseUnknownExits torrc option. Resolves bug 1751.
28104 o Major bugfixes (0.2.1.x and earlier):
28105 - Fix a bug in bandwidth accounting that could make us use twice
28106 the intended bandwidth when our interval start changes due to
28107 daylight saving time. Now we tolerate skew in stored vs computed
28108 interval starts: if the start of the period changes by no more than
28109 50% of the period's duration, we remember bytes that we transferred
28110 in the old period. Fixes bug 1511; bugfix on 0.0.9pre5.
28111 - Always search the Windows system directory for system DLLs, and
28112 nowhere else. Bugfix on 0.1.1.23; fixes bug 1954.
28113 - When you're using bridges and your network goes away and your
28114 bridges get marked as down, recover when you attempt a new socks
28115 connection (if the network is back), rather than waiting up to an
28116 hour to try fetching new descriptors for your bridges. Bugfix on
28117 0.2.0.3-alpha; fixes bug 1981.
28119 o Major bugfixes (on 0.2.2.x):
28120 - Fix compilation on Windows. Bugfix on 0.2.2.16-alpha; related to
28122 - Fix a segfault that could happen when operating a bridge relay with
28123 no GeoIP database set. Fixes bug 1964; bugfix on 0.2.2.15-alpha.
28124 - The consensus bandwidth-weights (used by clients to choose fast
28125 relays) entered an unexpected edge case in September where
28126 Exits were much scarcer than Guards, resulting in bad weight
28127 recommendations. Now we compute them using new constraints that
28128 should succeed in all cases. Also alter directory authorities to
28129 not include the bandwidth-weights line if they fail to produce
28130 valid values. Fixes bug 1952; bugfix on 0.2.2.10-alpha.
28131 - When weighting bridges during path selection, we used to trust
28132 the bandwidths they provided in their descriptor, only capping them
28133 at 10MB/s. This turned out to be problematic for two reasons:
28134 Bridges could claim to handle a lot more traffic then they
28135 actually would, thus making more clients pick them and have a
28136 pretty effective DoS attack. The other issue is that new bridges
28137 that might not have a good estimate for their bw capacity yet
28138 would not get used at all unless no other bridges are available
28139 to a client. Fixes bug 1912; bugfix on 0.2.2.7-alpha.
28141 o Major bugfixes (on the circuit build timeout feature, 0.2.2.x):
28142 - Ignore cannibalized circuits when recording circuit build times.
28143 This should provide for a minor performance improvement for hidden
28144 service users using 0.2.2.14-alpha, and should remove two spurious
28145 notice log messages. Bugfix on 0.2.2.14-alpha; fixes bug 1740.
28146 - Simplify the logic that causes us to decide if the network is
28147 unavailable for purposes of recording circuit build times. If we
28148 receive no cells whatsoever for the entire duration of a circuit's
28149 full measured lifetime, the network is probably down. Also ignore
28150 one-hop directory fetching circuit timeouts when calculating our
28151 circuit build times. These changes should hopefully reduce the
28152 cases where we see ridiculous circuit build timeouts for people
28153 with spotty wireless connections. Fixes part of bug 1772; bugfix
28155 - Prevent the circuit build timeout from becoming larger than
28156 the maximum build time we have ever seen. Also, prevent the time
28157 period for measurement circuits from becoming larger than twice that
28158 value. Fixes the other part of bug 1772; bugfix on 0.2.2.2-alpha.
28161 - When we run out of directory information such that we can't build
28162 circuits, but then get enough that we can build circuits, log when
28163 we actually construct a circuit, so the user has a better chance of
28164 knowing what's going on. Fixes bug 1362.
28165 - Be more generous with how much bandwidth we'd use up (with
28166 accounting enabled) before entering "soft hibernation". Previously,
28167 we'd refuse new connections and circuits once we'd used up 95% of
28168 our allotment. Now, we use up 95% of our allotment, AND make sure
28169 that we have no more than 500MB (or 3 hours of expected traffic,
28170 whichever is lower) remaining before we enter soft hibernation.
28171 - If we've configured EntryNodes and our network goes away and/or all
28172 our entrynodes get marked down, optimistically retry them all when
28173 a new socks application request appears. Fixes bug 1882.
28174 - Add some more defensive programming for architectures that can't
28175 handle unaligned integer accesses. We don't know of any actual bugs
28176 right now, but that's the best time to fix them. Fixes bug 1943.
28177 - Support line continuations in the torrc config file. If a line
28178 ends with a single backslash character, the newline is ignored, and
28179 the configuration value is treated as continuing on the next line.
28182 o Minor bugfixes (on 0.2.1.x and earlier):
28183 - For bandwidth accounting, calculate our expected bandwidth rate
28184 based on the time during which we were active and not in
28185 soft-hibernation during the last interval. Previously, we were
28186 also considering the time spent in soft-hibernation. If this
28187 was a long time, we would wind up underestimating our bandwidth
28188 by a lot, and skewing our wakeup time towards the start of the
28189 accounting interval. Fixes bug 1789. Bugfix on 0.0.9pre5.
28191 o Minor bugfixes (on 0.2.2.x):
28192 - Resume generating CIRC FAILED REASON=TIMEOUT control port messages,
28193 which were disabled by the circuit build timeout changes in
28194 0.2.2.14-alpha. Bugfix on 0.2.2.14-alpha; fixes bug 1739.
28195 - Make sure we don't warn about missing bandwidth weights when
28196 choosing bridges or other relays not in the consensus. Bugfix on
28197 0.2.2.10-alpha; fixes bug 1805.
28198 - In our logs, do not double-report signatures from unrecognized
28199 authorities both as "from unknown authority" and "not
28200 present". Fixes bug 1956, bugfix on 0.2.2.16-alpha.
28203 Changes in version 0.2.2.16-alpha - 2010-09-17
28204 Tor 0.2.2.16-alpha fixes a variety of old stream fairness bugs (most
28205 evident at exit relays), and also continues to resolve all the little
28206 bugs that have been filling up trac lately.
28208 o Major bugfixes (stream-level fairness):
28209 - When receiving a circuit-level SENDME for a blocked circuit, try
28210 to package cells fairly from all the streams that had previously
28211 been blocked on that circuit. Previously, we had started with the
28212 oldest stream, and allowed each stream to potentially exhaust
28213 the circuit's package window. This gave older streams on any
28214 given circuit priority over newer ones. Fixes bug 1937. Detected
28215 originally by Camilo Viecco. This bug was introduced before the
28216 first Tor release, in svn commit r152: it is the new winner of
28217 the longest-lived bug prize.
28218 - When the exit relay got a circuit-level sendme cell, it started
28219 reading on the exit streams, even if had 500 cells queued in the
28220 circuit queue already, so the circuit queue just grew and grew in
28221 some cases. We fix this by not re-enabling reading on receipt of a
28222 sendme cell when the cell queue is blocked. Fixes bug 1653. Bugfix
28223 on 0.2.0.1-alpha. Detected by Mashael AlSabah. Original patch by
28225 - Newly created streams were allowed to read cells onto circuits,
28226 even if the circuit's cell queue was blocked and waiting to drain.
28227 This created potential unfairness, as older streams would be
28228 blocked, but newer streams would gladly fill the queue completely.
28229 We add code to detect this situation and prevent any stream from
28230 getting more than one free cell. Bugfix on 0.2.0.1-alpha. Partially
28234 - Update to the September 1 2010 Maxmind GeoLite Country database.
28235 - Warn when CookieAuthFileGroupReadable is set but CookieAuthFile is
28236 not. This would lead to a cookie that is still not group readable.
28237 Closes bug 1843. Suggested by katmagic.
28238 - When logging a rate-limited warning, we now mention how many messages
28239 got suppressed since the last warning.
28240 - Add new "perconnbwrate" and "perconnbwburst" consensus params to
28241 do individual connection-level rate limiting of clients. The torrc
28242 config options with the same names trump the consensus params, if
28243 both are present. Replaces the old "bwconnrate" and "bwconnburst"
28244 consensus params which were broken from 0.2.2.7-alpha through
28245 0.2.2.14-alpha. Closes bug 1947.
28246 - When a router changes IP address or port, authorities now launch
28247 a new reachability test for it. Implements ticket 1899.
28248 - Make the formerly ugly "2 unknown, 7 missing key, 0 good, 0 bad,
28249 2 no signature, 4 required" messages about consensus signatures
28250 easier to read, and make sure they get logged at the same severity
28251 as the messages explaining which keys are which. Fixes bug 1290.
28252 - Don't warn when we have a consensus that we can't verify because
28253 of missing certificates, unless those certificates are ones
28254 that we have been trying and failing to download. Fixes bug 1145.
28255 - If you configure your bridge with a known identity fingerprint,
28256 and the bridge authority is unreachable (as it is in at least
28257 one country now), fall back to directly requesting the descriptor
28258 from the bridge. Finishes the feature started in 0.2.0.10-alpha;
28260 - When building with --enable-gcc-warnings on OpenBSD, disable
28261 warnings in system headers. This makes --enable-gcc-warnings
28262 pass on OpenBSD 4.8.
28264 o Minor bugfixes (on 0.2.1.x and earlier):
28265 - Authorities will now attempt to download consensuses if their
28266 own efforts to make a live consensus have failed. This change
28267 means authorities that restart will fetch a valid consensus, and
28268 it means authorities that didn't agree with the current consensus
28269 will still fetch and serve it if it has enough signatures. Bugfix
28270 on 0.2.0.9-alpha; fixes bug 1300.
28271 - Ensure DNS requests launched by "RESOLVE" commands from the
28272 controller respect the __LeaveStreamsUnattached setconf options. The
28273 same goes for requests launched via DNSPort or transparent
28274 proxying. Bugfix on 0.2.0.1-alpha; fixes bug 1525.
28275 - Allow handshaking OR connections to take a full KeepalivePeriod
28276 seconds to handshake. Previously, we would close them after
28277 IDLE_OR_CONN_TIMEOUT (180) seconds, the same timeout as if they
28278 were open. Bugfix on 0.2.1.26; fixes bug 1840. Thanks to mingw-san
28280 - Rate-limit "Failed to hand off onionskin" warnings.
28281 - Never relay a cell for a circuit we have already destroyed.
28282 Between marking a circuit as closeable and finally closing it,
28283 it may have been possible for a few queued cells to get relayed,
28284 even though they would have been immediately dropped by the next
28285 OR in the circuit. Fixes bug 1184; bugfix on 0.2.0.1-alpha.
28286 - Never queue a cell for a circuit that's already been marked
28288 - Never vote for a server as "Running" if we have a descriptor for
28289 it claiming to be hibernating, and that descriptor was published
28290 more recently than our last contact with the server. Bugfix on
28291 0.2.0.3-alpha; fixes bug 911.
28292 - Squash a compile warning on OpenBSD. Reported by Tas; fixes
28295 o Minor bugfixes (on 0.2.2.x):
28296 - Fix a regression introduced in 0.2.2.7-alpha that marked relays
28297 down if a directory fetch fails and you've configured either
28298 bridges or EntryNodes. The intent was to mark the relay as down
28299 _unless_ you're using bridges or EntryNodes, since if you are
28300 then you could quickly run out of entry points.
28301 - Fix the Windows directory-listing code. A bug introduced in
28302 0.2.2.14-alpha could make Windows directory servers forget to load
28303 some of their cached v2 networkstatus files.
28304 - Really allow clients to use relays as bridges. Fixes bug 1776;
28305 bugfix on 0.2.2.15-alpha.
28306 - Demote a warn to info that happens when the CellStatistics option
28307 was just enabled. Bugfix on 0.2.2.15-alpha; fixes bug 1921.
28308 Reported by Moritz Bartl.
28309 - On Windows, build correctly either with or without Unicode support.
28310 This is necessary so that Tor can support fringe platforms like
28311 Windows 98 (which has no Unicode), or Windows CE (which has no
28312 non-Unicode). Bugfix on 0.2.2.14-alpha; fixes bug 1797.
28315 - Add a unit test for cross-platform directory-listing code.
28318 Changes in version 0.2.2.15-alpha - 2010-08-18
28319 Tor 0.2.2.15-alpha fixes a big bug in hidden service availability,
28320 fixes a variety of other bugs that were preventing performance
28321 experiments from moving forward, fixes several bothersome memory leaks,
28322 and generally closes a lot of smaller bugs that have been filling up
28326 - Stop assigning the HSDir flag to relays that disable their
28327 DirPort (and thus will refuse to answer directory requests). This
28328 fix should dramatically improve the reachability of hidden services:
28329 hidden services and hidden service clients pick six HSDir relays
28330 to store and retrieve the hidden service descriptor, and currently
28331 about half of the HSDir relays will refuse to work. Bugfix on
28332 0.2.0.10-alpha; fixes part of bug 1693.
28333 - The PerConnBWRate and Burst config options, along with the
28334 bwconnrate and bwconnburst consensus params, initialized each conn's
28335 token bucket values only when the connection is established. Now we
28336 update them if the config options change, and update them every time
28337 we get a new consensus. Otherwise we can encounter an ugly edge
28338 case where we initialize an OR conn to client-level bandwidth,
28339 but then later the relay joins the consensus and we leave it
28340 throttled. Bugfix on 0.2.2.7-alpha; fixes bug 1830.
28341 - Fix a regression that caused Tor to rebind its ports if it receives
28342 SIGHUP while hibernating. Bugfix in 0.1.1.6-alpha; closes bug 919.
28345 - Lower the maximum weighted-fractional-uptime cutoff to 98%. This
28346 should give us approximately 40-50% more Guard-flagged nodes,
28347 improving the anonymity the Tor network can provide and also
28348 decreasing the dropoff in throughput that relays experience when
28349 they first get the Guard flag.
28350 - Allow enabling or disabling the *Statistics config options while
28354 - Update to the August 1 2010 Maxmind GeoLite Country database.
28355 - Have the controller interface give a more useful message than
28356 "Internal Error" in response to failed GETINFO requests.
28357 - Warn when the same option is provided more than once in a torrc
28358 file, on the command line, or in a single SETCONF statement, and
28359 the option is one that only accepts a single line. Closes bug 1384.
28360 - Build correctly on mingw with more recent versions of OpenSSL 0.9.8.
28361 Patch from mingw-san.
28362 - Add support for the country code "{??}" in torrc options like
28363 ExcludeNodes, to indicate all routers of unknown country. Closes
28365 - Relays report the number of bytes spent on answering directory
28366 requests in extra-info descriptors similar to {read,write}-history.
28367 Implements enhancement 1790.
28369 o Minor bugfixes (on 0.2.1.x and earlier):
28370 - Complain if PublishServerDescriptor is given multiple arguments that
28371 include 0 or 1. This configuration will be rejected in the future.
28372 Bugfix on 0.2.0.1-alpha; closes bug 1107.
28373 - Disallow BridgeRelay 1 and ORPort 0 at once in the configuration.
28374 Bugfix on 0.2.0.13-alpha; closes bug 928.
28375 - Change "Application request when we're believed to be offline."
28376 notice to "Application request when we haven't used client
28377 functionality lately.", to clarify that it's not an error. Bugfix
28378 on 0.0.9.3; fixes bug 1222.
28379 - Fix a bug in the controller interface where "GETINFO ns/asdaskljkl"
28380 would return "551 Internal error" rather than "552 Unrecognized key
28381 ns/asdaskljkl". Bugfix on 0.1.2.3-alpha.
28382 - Users can't configure a regular relay to be their bridge. It didn't
28383 work because when Tor fetched the bridge descriptor, it found
28384 that it already had it, and didn't realize that the purpose of the
28385 descriptor had changed. Now we replace routers with a purpose other
28386 than bridge with bridge descriptors when fetching them. Bugfix on
28387 0.1.1.9-alpha. Bug 1776 not yet fixed because now we immediately
28388 refetch the descriptor with router purpose 'general', disabling
28390 - Fix a rare bug in rend_fn unit tests: we would fail a test when
28391 a randomly generated port is 0. Diagnosed by Matt Edman. Bugfix
28392 on 0.2.0.10-alpha; fixes bug 1808.
28393 - Exit nodes didn't recognize EHOSTUNREACH as a plausible error code,
28394 and so sent back END_STREAM_REASON_MISC. Clients now recognize a new
28395 stream ending reason for this case: END_STREAM_REASON_NOROUTE.
28396 Servers can start sending this code when enough clients recognize
28397 it. Also update the spec to reflect this new reason. Bugfix on
28398 0.1.0.1-rc; fixes part of bug 1793.
28399 - Delay geoip stats collection by bridges for 6 hours, not 2 hours,
28400 when we switch from being a public relay to a bridge. Otherwise
28401 there will still be clients that see the relay in their consensus,
28402 and the stats will end up wrong. Bugfix on 0.2.1.15-rc; fixes bug
28404 - Instead of giving an assertion failure on an internal mismatch
28405 on estimated freelist size, just log a BUG warning and try later.
28406 Mitigates but does not fix bug 1125.
28407 - Fix an assertion failure that could occur in caches or bridge users
28408 when using a very short voting interval on a testing network.
28409 Diagnosed by Robert Hogan. Fixes bug 1141; bugfix on 0.2.0.8-alpha.
28411 o Minor bugfixes (on 0.2.2.x):
28412 - Alter directory authorities to always consider Exit-flagged nodes
28413 as potential Guard nodes in their votes. The actual decision to
28414 use Exits as Guards is done in the consensus bandwidth weights.
28415 Fixes bug 1294; bugfix on 0.2.2.10-alpha.
28416 - When the controller is reporting the purpose of circuits that
28417 didn't finish building before the circuit build timeout, it was
28418 printing UNKNOWN_13. Now print EXPIRED. Bugfix on 0.2.2.14-alpha.
28419 - Our libevent version parsing code couldn't handle versions like
28420 1.4.14b-stable and incorrectly warned the user about using an
28421 old and broken version of libevent. Treat 1.4.14b-stable like
28422 1.4.14-stable when parsing the version. Fixes bug 1731; bugfix
28424 - Don't use substitution references like $(VAR:MOD) when
28425 $(asciidoc_files) is empty -- make(1) on NetBSD transforms
28426 '$(:x)' to 'x' rather than the empty string. This bites us in
28427 doc/ when configured with --disable-asciidoc. Bugfix on
28428 0.2.2.9-alpha; fixes bug 1773.
28429 - Remove a spurious hidden service server-side log notice about
28430 "Ancient non-dirty circuits". Bugfix on 0.2.2.14-alpha; fixes
28432 - Fix compilation with --with-dmalloc set. Bugfix on 0.2.2.6-alpha;
28434 - Correctly report written bytes on linked connections. Found while
28435 implementing 1790. Bugfix on 0.2.2.4-alpha.
28436 - Fix three memory leaks: one in circuit_build_times_parse_state(),
28437 one in dirvote_add_signatures_to_pending_consensus(), and one every
28438 time we parse a v3 network consensus. Bugfixes on 0.2.2.14-alpha,
28439 0.2.2.6-alpha, and 0.2.2.10-alpha respectively; fixes bug 1831.
28441 o Code simplifications and refactoring:
28442 - Take a first step towards making or.h smaller by splitting out
28443 function definitions for all source files in src/or/. Leave
28444 structures and defines in or.h for now.
28445 - Remove a bunch of unused function declarations as well as a block of
28446 #if 0'd code from the unit tests. Closes bug 1824.
28447 - New unit tests for exit-port history statistics; refactored exit
28448 statistics code to be more easily tested.
28449 - Remove the old debian/ directory from the main Tor distribution.
28450 The official Tor-for-debian git repository lives at the URL
28451 https://git.torproject.org/debian/tor.git
28454 Changes in version 0.2.2.14-alpha - 2010-07-12
28455 Tor 0.2.2.14-alpha greatly improves client-side handling of
28456 circuit build timeouts, which are used to estimate speed and improve
28457 performance. We also move to a much better GeoIP database, port Tor to
28458 Windows CE, introduce new compile flags that improve code security,
28459 add an eighth v3 directory authority, and address a lot of more
28463 - Tor directory authorities no longer crash when started with a
28464 cached-microdesc-consensus file in their data directory. Bugfix
28465 on 0.2.2.6-alpha; fixes bug 1532.
28466 - Treat an unset $HOME like an empty $HOME rather than triggering an
28467 assert. Bugfix on 0.0.8pre1; fixes bug 1522.
28468 - Ignore negative and large circuit build timeout values that can
28469 happen during a suspend or hibernate. These values caused various
28470 asserts to fire. Bugfix on 0.2.2.2-alpha; fixes bug 1245.
28471 - Alter calculation of Pareto distribution parameter 'Xm' for
28472 Circuit Build Timeout learning to use the weighted average of the
28473 top N=3 modes (because we have three entry guards). Considering
28474 multiple modes should improve the timeout calculation in some cases,
28475 and prevent extremely high timeout values. Bugfix on 0.2.2.2-alpha;
28477 - Alter calculation of Pareto distribution parameter 'Alpha' to use a
28478 right censored distribution model. This approach improves over the
28479 synthetic timeout generation approach that was producing insanely
28480 high timeout values. Now we calculate build timeouts using truncated
28481 times. Bugfix on 0.2.2.2-alpha; fixes bugs 1245 and 1335.
28482 - Do not close circuits that are under construction when they reach
28483 the circuit build timeout. Instead, leave them building (but do not
28484 use them) for up until the time corresponding to the 95th percentile
28485 on the Pareto CDF or 60 seconds, whichever is greater. This is done
28486 to provide better data for the new Pareto model. This percentile
28487 can be controlled by the consensus.
28490 - Move to the June 2010 Maxmind GeoLite country db (rather than the
28491 June 2009 ip-to-country GeoIP db) for our statistics that count
28492 how many users relays are seeing from each country. Now we have
28493 more accurate data for many African countries.
28494 - Port Tor to build and run correctly on Windows CE systems, using
28495 the wcecompat library. Contributed by Valerio Lupi.
28496 - New "--enable-gcc-hardening" ./configure flag (off by default)
28497 to turn on gcc compile time hardening options. It ensures
28498 that signed ints have defined behavior (-fwrapv), enables
28499 -D_FORTIFY_SOURCE=2 (requiring -O2), adds stack smashing protection
28500 with canaries (-fstack-protector-all), turns on ASLR protection if
28501 supported by the kernel (-fPIE, -pie), and adds additional security
28502 related warnings. Verified to work on Mac OS X and Debian Lenny.
28503 - New "--enable-linker-hardening" ./configure flag (off by default)
28504 to turn on ELF specific hardening features (relro, now). This does
28505 not work with Mac OS X or any other non-ELF binary format.
28507 o New directory authorities:
28508 - Set up maatuska (run by Linus Nordberg) as the eighth v3 directory
28512 - New config option "WarnUnsafeSocks 0" disables the warning that
28513 occurs whenever Tor receives a socks handshake using a version of
28514 the socks protocol that can only provide an IP address (rather
28515 than a hostname). Setups that do DNS locally over Tor are fine,
28516 and we shouldn't spam the logs in that case.
28517 - Convert the HACKING file to asciidoc, and add a few new sections
28518 to it, explaining how we use Git, how we make changelogs, and
28519 what should go in a patch.
28520 - Add a TIMEOUT_RATE keyword to the BUILDTIMEOUT_SET control port
28521 event, to give information on the current rate of circuit timeouts
28522 over our stored history.
28523 - Add ability to disable circuit build time learning via consensus
28524 parameter and via a LearnCircuitBuildTimeout config option. Also
28525 automatically disable circuit build time calculation if we are
28526 either a AuthoritativeDirectory, or if we fail to write our state
28527 file. Fixes bug 1296.
28528 - More gracefully handle corrupt state files, removing asserts
28529 in favor of saving a backup and resetting state.
28530 - Rename the "log.h" header to "torlog.h" so as to conflict with fewer
28534 - Build correctly on OSX with zlib 1.2.4 and higher with all warnings
28536 - When a2x fails, mention that the user could disable manpages instead
28537 of trying to fix their asciidoc installation.
28538 - Where available, use Libevent 2.0's periodic timers so that our
28539 once-per-second cleanup code gets called even more closely to
28540 once per second than it would otherwise. Fixes bug 943.
28541 - If you run a bridge that listens on multiple IP addresses, and
28542 some user configures a bridge address that uses a different IP
28543 address than your bridge writes in its router descriptor, and the
28544 user doesn't specify an identity key, their Tor would discard the
28545 descriptor because "it isn't one of our configured bridges", and
28546 fail to bootstrap. Now believe the descriptor and bootstrap anyway.
28547 Bugfix on 0.2.0.3-alpha.
28548 - If OpenSSL fails to make a duplicate of a private or public key, log
28549 an error message and try to exit cleanly. May help with debugging
28550 if bug 1209 ever remanifests.
28551 - Save a couple bytes in memory allocation every time we escape
28552 certain characters in a string. Patch from Florian Zumbiehl.
28553 - Make it explicit that we don't cannibalize one-hop circuits. This
28554 happens in the wild, but doesn't turn out to be a problem because
28555 we fortunately don't use those circuits. Many thanks to outofwords
28556 for the initial analysis and to swissknife who confirmed that
28557 two-hop circuits are actually created.
28558 - Make directory mirrors report non-zero dirreq-v[23]-shares again.
28559 Fixes bug 1564; bugfix on 0.2.2.9-alpha.
28560 - Eliminate a case where a circuit build time warning was displayed
28561 after network connectivity resumed. Bugfix on 0.2.2.2-alpha.
28564 Changes in version 0.2.1.26 - 2010-05-02
28565 Tor 0.2.1.26 addresses the recent connection and memory overload
28566 problems we've been seeing on relays, especially relays with their
28567 DirPort open. If your relay has been crashing, or you turned it off
28568 because it used too many resources, give this release a try.
28570 This release also fixes yet another instance of broken OpenSSL libraries
28571 that was causing some relays to drop out of the consensus.
28574 - Teach relays to defend themselves from connection overload. Relays
28575 now close idle circuits early if it looks like they were intended
28576 for directory fetches. Relays are also more aggressive about closing
28577 TLS connections that have no circuits on them. Such circuits are
28578 unlikely to be re-used, and tens of thousands of them were piling
28579 up at the fast relays, causing the relays to run out of sockets
28580 and memory. Bugfix on 0.2.0.22-rc (where clients started tunneling
28581 their directory fetches over TLS).
28582 - Fix SSL renegotiation behavior on OpenSSL versions like on Centos
28583 that claim to be earlier than 0.9.8m, but which have in reality
28584 backported huge swaths of 0.9.8m or 0.9.8n renegotiation
28585 behavior. Possible fix for some cases of bug 1346.
28586 - Directory mirrors were fetching relay descriptors only from v2
28587 directory authorities, rather than v3 authorities like they should.
28588 Only 2 v2 authorities remain (compared to 7 v3 authorities), leading
28589 to a serious bottleneck. Bugfix on 0.2.0.9-alpha. Fixes bug 1324.
28592 - Finally get rid of the deprecated and now harmful notion of "clique
28593 mode", where directory authorities maintain TLS connections to
28597 - In the util/threads test, no longer free the test_mutex before all
28598 worker threads have finished. Bugfix on 0.2.1.6-alpha.
28599 - The master thread could starve the worker threads quite badly on
28600 certain systems, causing them to run only partially in the allowed
28601 window. This resulted in test failures. Now the master thread sleeps
28602 occasionally for a few microseconds while the two worker-threads
28603 compete for the mutex. Bugfix on 0.2.0.1-alpha.
28606 Changes in version 0.2.2.13-alpha - 2010-04-24
28607 Tor 0.2.2.13-alpha addresses the recent connection and memory overload
28608 problems we've been seeing on relays, especially relays with their
28609 DirPort open. If your relay has been crashing, or you turned it off
28610 because it used too many resources, give this release a try.
28613 - Teach relays to defend themselves from connection overload. Relays
28614 now close idle circuits early if it looks like they were intended
28615 for directory fetches. Relays are also more aggressive about closing
28616 TLS connections that have no circuits on them. Such circuits are
28617 unlikely to be re-used, and tens of thousands of them were piling
28618 up at the fast relays, causing the relays to run out of sockets
28619 and memory. Bugfix on 0.2.0.22-rc (where clients started tunneling
28620 their directory fetches over TLS).
28623 - Finally get rid of the deprecated and now harmful notion of "clique
28624 mode", where directory authorities maintain TLS connections to
28626 - Directory authorities now do an immediate reachability check as soon
28627 as they hear about a new relay. This change should slightly reduce
28628 the time between setting up a relay and getting listed as running
28629 in the consensus. It should also improve the time between setting
28630 up a bridge and seeing use by bridge users.
28631 - Directory authorities no longer launch a TLS connection to every
28632 relay as they startup. Now that we have 2k+ descriptors cached,
28633 the resulting network hiccup is becoming a burden. Besides,
28634 authorities already avoid voting about Running for the first half
28635 hour of their uptime.
28638 Changes in version 0.2.2.12-alpha - 2010-04-20
28639 Tor 0.2.2.12-alpha fixes a critical bug in how directory authorities
28640 handle and vote on descriptors. It was causing relays to drop out of
28644 - Many relays have been falling out of the consensus lately because
28645 not enough authorities know about their descriptor for them to get
28646 a majority of votes. When we deprecated the v2 directory protocol,
28647 we got rid of the only way that v3 authorities can hear from each
28648 other about other descriptors. Now authorities examine every v3
28649 vote for new descriptors, and fetch them from that authority. Bugfix
28651 - Fix two typos in tor_vasprintf() that broke the compile on Windows,
28652 and a warning in or.h related to bandwidth_weight_rule_t that
28653 prevented clean compile on OS X. Fixes bug 1363; bugfix on
28655 - Fix a segfault on relays when DirReqStatistics is enabled
28656 and 24 hours pass. Bug found by keb. Fixes bug 1365; bugfix on
28660 - Demote a confusing TLS warning that relay operators might get when
28661 someone tries to talk to their OrPort. It is neither the operator's
28662 fault nor can they do anything about it. Fixes bug 1364; bugfix
28666 Changes in version 0.2.2.11-alpha - 2010-04-15
28667 Tor 0.2.2.11-alpha fixes yet another instance of broken OpenSSL
28668 libraries that was causing some relays to drop out of the consensus.
28671 - Directory mirrors were fetching relay descriptors only from v2
28672 directory authorities, rather than v3 authorities like they should.
28673 Only 2 v2 authorities remain (compared to 7 v3 authorities), leading
28674 to a serious bottleneck. Bugfix on 0.2.0.9-alpha. Fixes bug 1324.
28675 - Fix a parsing error that made every possible value of
28676 CircPriorityHalflifeMsec get treated as "1 msec". Bugfix
28677 on 0.2.2.7-alpha. Rename CircPriorityHalflifeMsec to
28678 CircuitPriorityHalflifeMsec, so authorities can tell newer relays
28679 about the option without breaking older ones.
28680 - Fix SSL renegotiation behavior on OpenSSL versions like on Centos
28681 that claim to be earlier than 0.9.8m, but which have in reality
28682 backported huge swaths of 0.9.8m or 0.9.8n renegotiation
28683 behavior. Possible fix for some cases of bug 1346.
28686 - Experiment with a more aggressive approach to preventing clients
28687 from making one-hop exit streams. Exit relays who want to try it
28688 out can set "RefuseUnknownExits 1" in their torrc, and then look
28689 for "Attempt by %s to open a stream" log messages. Let us know
28691 - Add support for statically linking zlib by specifying
28692 --enable-static-zlib, to go with our support for statically linking
28693 openssl and libevent. Resolves bug 1358.
28696 - Fix a segfault that happens whenever a Tor client that is using
28697 libevent2's bufferevents gets a hup signal. Bugfix on 0.2.2.5-alpha;
28699 - When we cleaned up the contrib/tor-exit-notice.html file, we left
28700 out the first line. Fixes bug 1295.
28701 - When building the manpage from a tarball, we required asciidoc, but
28702 the asciidoc -> roff/html conversion was already done for the
28703 tarball. Make 'make' complain only when we need asciidoc (either
28704 because we're compiling directly from git, or because we altered
28705 the asciidoc manpage in the tarball). Bugfix on 0.2.2.9-alpha.
28706 - When none of the directory authorities vote on any params, Tor
28707 segfaulted when trying to make the consensus from the votes. We
28708 didn't trigger the bug in practice, because authorities do include
28709 params in their votes. Bugfix on 0.2.2.10-alpha; fixes bug 1322.
28712 - In the util/threads test, no longer free the test_mutex before all
28713 worker threads have finished. Bugfix on 0.2.1.6-alpha.
28714 - The master thread could starve the worker threads quite badly on
28715 certain systems, causing them to run only partially in the allowed
28716 window. This resulted in test failures. Now the master thread sleeps
28717 occasionally for a few microseconds while the two worker-threads
28718 compete for the mutex. Bugfix on 0.2.0.1-alpha.
28721 Changes in version 0.2.2.10-alpha - 2010-03-07
28722 Tor 0.2.2.10-alpha fixes a regression introduced in 0.2.2.9-alpha that
28723 could prevent relays from guessing their IP address correctly. It also
28724 starts the groundwork for another client-side performance boost, since
28725 currently we're not making efficient use of relays that have both the
28726 Guard flag and the Exit flag.
28729 - Fix a regression from our patch for bug 1244 that caused relays
28730 to guess their IP address incorrectly if they didn't set Address
28731 in their torrc and/or their address fails to resolve. Bugfix on
28732 0.2.2.9-alpha; fixes bug 1269.
28734 o Major features (performance):
28735 - Directory authorities now compute consensus weightings that instruct
28736 clients how to weight relays flagged as Guard, Exit, Guard+Exit,
28737 and no flag. Clients that use these weightings will distribute
28738 network load more evenly across these different relay types. The
28739 weightings are in the consensus so we can change them globally in
28740 the future. Extra thanks to "outofwords" for finding some nasty
28741 security bugs in the first implementation of this feature.
28743 o Minor features (performance):
28744 - Always perform router selections using weighted relay bandwidth,
28745 even if we don't need a high capacity circuit at the time. Non-fast
28746 circuits now only differ from fast ones in that they can use relays
28747 not marked with the Fast flag. This "feature" could turn out to
28748 be a horrible bug; we should investigate more before it goes into
28752 - Allow disabling building of the manpages. Skipping the manpage
28753 speeds up the build considerably.
28755 o Minor bugfixes (on 0.2.2.x):
28756 - Fix a memleak in the EXTENDCIRCUIT logic. Spotted by coverity.
28757 Bugfix on 0.2.2.9-alpha.
28758 - Disallow values larger than INT32_MAX for PerConnBWRate|Burst
28759 config option. Bugfix on 0.2.2.7-alpha.
28760 - Ship the asciidoc-helper file in the tarball, so that people can
28761 build from source if they want to, and touching the .1.txt files
28762 doesn't break the build. Bugfix on 0.2.2.9-alpha.
28764 o Minor bugfixes (on 0.2.1.x or earlier):
28765 - Fix a dereference-then-NULL-check sequence when publishing
28766 descriptors. Bugfix on 0.2.1.5-alpha. Discovered by ekir; fixes
28768 - Fix another dereference-then-NULL-check sequence. Bugfix on
28769 0.2.1.14-rc. Discovered by ekir; fixes bug 1256.
28770 - Make sure we treat potentially not NUL-terminated strings correctly.
28771 Bugfix on 0.1.1.13-alpha. Discovered by rieo; fixes bug 1257.
28773 o Code simplifications and refactoring:
28774 - Fix some urls in the exit notice file and make it XHTML1.1 strict
28775 compliant. Based on a patch from Christian Kujau.
28776 - Don't use sed in asciidoc-helper anymore.
28777 - Make the build process fail if asciidoc cannot be found and
28778 building with asciidoc isn't disabled.
28781 Changes in version 0.2.2.9-alpha - 2010-02-22
28782 Tor 0.2.2.9-alpha makes Tor work again on the latest OS X, updates the
28783 location of a directory authority, and cleans up a bunch of small bugs.
28785 o Directory authority changes:
28786 - Change IP address for dannenberg (v3 directory authority), and
28787 remove moria2 (obsolete v1, v2 directory authority and v0 hidden
28788 service directory authority) from the list.
28791 - Make Tor work again on the latest OS X: when deciding whether to
28792 use strange flags to turn TLS renegotiation on, detect the OpenSSL
28793 version at run-time, not compile time. We need to do this because
28794 Apple doesn't update its dev-tools headers when it updates its
28795 libraries in a security patch.
28796 - Fix a potential buffer overflow in lookup_last_hid_serv_request()
28797 that could happen on 32-bit platforms with 64-bit time_t. Also fix
28798 a memory leak when requesting a hidden service descriptor we've
28799 requested before. Fixes bug 1242, bugfix on 0.2.0.18-alpha. Found
28801 - Authorities could be tricked into giving out the Exit flag to relays
28802 that didn't allow exiting to any ports. This bug could screw
28803 with load balancing and stats. Bugfix on 0.1.1.6-alpha; fixes bug
28804 1238. Bug discovered by Martin Kowalczyk.
28805 - When freeing a session key, zero it out completely. We only zeroed
28806 the first ptrsize bytes. Bugfix on 0.0.2pre8. Discovered and
28807 patched by ekir. Fixes bug 1254.
28810 - Fix static compilation by listing the openssl libraries in the right
28811 order. Bugfix on Tor 0.2.2.8-alpha; fixes bug 1237.
28812 - Resume handling .exit hostnames in a special way: originally we
28813 stripped the .exit part and used the requested exit relay. In
28814 0.2.2.1-alpha we stopped treating them in any special way, meaning
28815 if you use a .exit address then Tor will pass it on to the exit
28816 relay. Now we reject the .exit stream outright, since that behavior
28817 might be more expected by the user. Found and diagnosed by Scott
28818 Bennett and Downie on or-talk.
28819 - Don't spam the controller with events when we have no file
28820 descriptors available. Bugfix on 0.2.1.5-alpha. (Rate-limiting
28821 for log messages was already solved from bug 748.)
28822 - Avoid a bogus overlapped memcpy in tor_addr_copy(). Reported by
28824 - Make the DNSPort option work with libevent 2.x. Don't alter the
28825 behavior for libevent 1.x. Fixes bug 1143. Found by SwissTorExit.
28826 - Emit a GUARD DROPPED controller event for a case we missed.
28827 - Make more fields in the controller protocol case-insensitive, since
28828 control-spec.txt said they were.
28829 - Refactor resolve_my_address() to not use gethostbyname() anymore.
28830 Fixes bug 1244; bugfix on 0.0.2pre25. Reported by Mike Mestnik.
28831 - Fix a spec conformance issue: the network-status-version token
28832 must be the first token in a v3 consensus or vote. Discovered by
28833 parakeep. Bugfix on 0.2.0.3-alpha.
28835 o Code simplifications and refactoring:
28836 - Generate our manpage and HTML documentation using Asciidoc. This
28837 change should make it easier to maintain the documentation, and
28838 produce nicer HTML.
28839 - Remove the --enable-iphone option. According to reports from Marco
28840 Bonetti, Tor builds fine without any special tweaking on recent
28841 iPhone SDK versions.
28842 - Removed some unnecessary files from the source distribution. The
28843 AUTHORS file has now been merged into the people page on the
28844 website. The roadmaps and design doc can now be found in the
28845 projects directory in svn.
28846 - Enabled various circuit build timeout constants to be controlled
28847 by consensus parameters. Also set better defaults for these
28848 parameters based on experimentation on broadband and simulated
28849 high latency links.
28852 - The 'EXTENDCIRCUIT' control port command can now be used with
28853 a circ id of 0 and no path. This feature will cause Tor to build
28854 a new 'fast' general purpose circuit using its own path selection
28856 - Added a BUILDTIMEOUT_SET controller event to describe changes
28857 to the circuit build timeout.
28858 - Future-proof the controller protocol a bit by ignoring keyword
28859 arguments we do not recognize.
28860 - Expand homedirs passed to tor-checkkey. This should silence a
28861 coverity complaint about passing a user-supplied string into
28862 open() without checking it.
28865 Changes in version 0.2.1.25 - 2010-03-16
28866 Tor 0.2.1.25 fixes a regression introduced in 0.2.1.23 that could
28867 prevent relays from guessing their IP address correctly. It also fixes
28868 several minor potential security bugs.
28871 - Fix a regression from our patch for bug 1244 that caused relays
28872 to guess their IP address incorrectly if they didn't set Address
28873 in their torrc and/or their address fails to resolve. Bugfix on
28874 0.2.1.23; fixes bug 1269.
28875 - When freeing a session key, zero it out completely. We only zeroed
28876 the first ptrsize bytes. Bugfix on 0.0.2pre8. Discovered and
28877 patched by ekir. Fixes bug 1254.
28880 - Fix a dereference-then-NULL-check sequence when publishing
28881 descriptors. Bugfix on 0.2.1.5-alpha. Discovered by ekir; fixes
28883 - Fix another dereference-then-NULL-check sequence. Bugfix on
28884 0.2.1.14-rc. Discovered by ekir; fixes bug 1256.
28885 - Make sure we treat potentially not NUL-terminated strings correctly.
28886 Bugfix on 0.1.1.13-alpha. Discovered by rieo; fixes bug 1257.
28890 Changes in version 0.2.1.24 - 2010-02-21
28891 Tor 0.2.1.24 makes Tor work again on the latest OS X -- this time
28895 - Work correctly out-of-the-box with even more vendor-patched versions
28896 of OpenSSL. In particular, make it so Debian and OS X don't need
28897 customized patches to run/build.
28900 Changes in version 0.2.1.23 - 2010-02-13
28901 Tor 0.2.1.23 fixes a huge client-side performance bug, makes Tor work
28902 again on the latest OS X, and updates the location of a directory
28905 o Major bugfixes (performance):
28906 - We were selecting our guards uniformly at random, and then weighting
28907 which of our guards we'd use uniformly at random. This imbalance
28908 meant that Tor clients were severely limited on throughput (and
28909 probably latency too) by the first hop in their circuit. Now we
28910 select guards weighted by currently advertised bandwidth. We also
28911 automatically discard guards picked using the old algorithm. Fixes
28912 bug 1217; bugfix on 0.2.1.3-alpha. Found by Mike Perry.
28915 - Make Tor work again on the latest OS X: when deciding whether to
28916 use strange flags to turn TLS renegotiation on, detect the OpenSSL
28917 version at run-time, not compile time. We need to do this because
28918 Apple doesn't update its dev-tools headers when it updates its
28919 libraries in a security patch.
28920 - Fix a potential buffer overflow in lookup_last_hid_serv_request()
28921 that could happen on 32-bit platforms with 64-bit time_t. Also fix
28922 a memory leak when requesting a hidden service descriptor we've
28923 requested before. Fixes bug 1242, bugfix on 0.2.0.18-alpha. Found
28926 o Directory authority changes:
28927 - Change IP address for dannenberg (v3 directory authority), and
28928 remove moria2 (obsolete v1, v2 directory authority and v0 hidden
28929 service directory authority) from the list.
28932 - Refactor resolve_my_address() to not use gethostbyname() anymore.
28933 Fixes bug 1244; bugfix on 0.0.2pre25. Reported by Mike Mestnik.
28936 - Avoid a mad rush at the beginning of each month when each client
28937 rotates half of its guards. Instead we spread the rotation out
28938 throughout the month, but we still avoid leaving a precise timestamp
28939 in the state file about when we first picked the guard. Improves
28940 over the behavior introduced in 0.1.2.17.
28943 Changes in version 0.2.2.8-alpha - 2010-01-26
28944 Tor 0.2.2.8-alpha fixes a crash bug in 0.2.2.7-alpha that has been
28945 causing bridge relays to disappear. If you're running a bridge,
28949 - Fix a memory corruption bug on bridges that occurred during the
28950 inclusion of stats data in extra-info descriptors. Also fix the
28951 interface for geoip_get_bridge_stats* to prevent similar bugs in
28952 the future. Diagnosis by Tas, patch by Karsten and Sebastian.
28953 Fixes bug 1208; bugfix on 0.2.2.7-alpha.
28956 - Ignore OutboundBindAddress when connecting to localhost.
28957 Connections to localhost need to come _from_ localhost, or else
28958 local servers (like DNS and outgoing HTTP/SOCKS proxies) will often
28962 Changes in version 0.2.2.7-alpha - 2010-01-19
28963 Tor 0.2.2.7-alpha fixes a huge client-side performance bug, as well
28964 as laying the groundwork for further relay-side performance fixes. It
28965 also starts cleaning up client behavior with respect to the EntryNodes,
28966 ExitNodes, and StrictNodes config options.
28968 This release also rotates two directory authority keys, due to a
28969 security breach of some of the Torproject servers.
28971 o Directory authority changes:
28972 - Rotate keys (both v3 identity and relay identity) for moria1
28975 o Major features (performance):
28976 - We were selecting our guards uniformly at random, and then weighting
28977 which of our guards we'd use uniformly at random. This imbalance
28978 meant that Tor clients were severely limited on throughput (and
28979 probably latency too) by the first hop in their circuit. Now we
28980 select guards weighted by currently advertised bandwidth. We also
28981 automatically discard guards picked using the old algorithm. Fixes
28982 bug 1217; bugfix on 0.2.1.3-alpha. Found by Mike Perry.
28983 - When choosing which cells to relay first, relays can now favor
28984 circuits that have been quiet recently, to provide lower latency
28985 for low-volume circuits. By default, relays enable or disable this
28986 feature based on a setting in the consensus. You can override
28987 this default by using the new "CircuitPriorityHalflife" config
28988 option. Design and code by Ian Goldberg, Can Tang, and Chris
28990 - Add separate per-conn write limiting to go with the per-conn read
28991 limiting. We added a global write limit in Tor 0.1.2.5-alpha,
28992 but never per-conn write limits.
28993 - New consensus params "bwconnrate" and "bwconnburst" to let us
28994 rate-limit client connections as they enter the network. It's
28995 controlled in the consensus so we can turn it on and off for
28996 experiments. It's starting out off. Based on proposal 163.
28998 o Major features (relay selection options):
28999 - Switch to a StrictNodes config option, rather than the previous
29000 "StrictEntryNodes" / "StrictExitNodes" separation that was missing a
29001 "StrictExcludeNodes" option.
29002 - If EntryNodes, ExitNodes, ExcludeNodes, or ExcludeExitNodes
29003 change during a config reload, mark and discard all our origin
29004 circuits. This fix should address edge cases where we change the
29005 config options and but then choose a circuit that we created before
29007 - If EntryNodes or ExitNodes are set, be more willing to use an
29008 unsuitable (e.g. slow or unstable) circuit. The user asked for it,
29010 - Make EntryNodes config option much more aggressive even when
29011 StrictNodes is not set. Before it would prepend your requested
29012 entrynodes to your list of guard nodes, but feel free to use others
29013 after that. Now it chooses only from your EntryNodes if any of
29014 those are available, and only falls back to others if a) they're
29015 all down and b) StrictNodes is not set.
29016 - Now we refresh your entry guards from EntryNodes at each consensus
29017 fetch -- rather than just at startup and then they slowly rot as
29018 the network changes.
29021 - Stop bridge directory authorities from answering dbg-stability.txt
29022 directory queries, which would let people fetch a list of all
29023 bridge identities they track. Bugfix on 0.2.1.6-alpha.
29026 - Log a notice when we get a new control connection. Now it's easier
29027 for security-conscious users to recognize when a local application
29028 is knocking on their controller door. Suggested by bug 1196.
29029 - New config option "CircuitStreamTimeout" to override our internal
29030 timeout schedule for how many seconds until we detach a stream from
29031 a circuit and try a new circuit. If your network is particularly
29032 slow, you might want to set this to a number like 60.
29033 - New controller command "getinfo config-text". It returns the
29034 contents that Tor would write if you send it a SAVECONF command,
29035 so the controller can write the file to disk itself.
29036 - New options for SafeLogging to allow scrubbing only log messages
29037 generated while acting as a relay.
29038 - Ship the bridges spec file in the tarball too.
29039 - Avoid a mad rush at the beginning of each month when each client
29040 rotates half of its guards. Instead we spread the rotation out
29041 throughout the month, but we still avoid leaving a precise timestamp
29042 in the state file about when we first picked the guard. Improves
29043 over the behavior introduced in 0.1.2.17.
29045 o Minor bugfixes (compiling):
29046 - Fix compilation on OS X 10.3, which has a stub mlockall() but
29047 hides it. Bugfix on 0.2.2.6-alpha.
29048 - Fix compilation on Solaris by removing support for the
29049 DisableAllSwap config option. Solaris doesn't have an rlimit for
29050 mlockall, so we cannot use it safely. Fixes bug 1198; bugfix on
29053 o Minor bugfixes (crashes):
29054 - Do not segfault when writing buffer stats when we haven't observed
29055 a single circuit to report about. Found by Fabian Lanze. Bugfix on
29057 - If we're in the pathological case where there's no exit bandwidth
29058 but there is non-exit bandwidth, or no guard bandwidth but there
29059 is non-guard bandwidth, don't crash during path selection. Bugfix
29061 - Fix an impossible-to-actually-trigger buffer overflow in relay
29062 descriptor generation. Bugfix on 0.1.0.15.
29064 o Minor bugfixes (privacy):
29065 - Fix an instance where a Tor directory mirror might accidentally
29066 log the IP address of a misbehaving Tor client. Bugfix on
29068 - Don't list Windows capabilities in relay descriptors. We never made
29069 use of them, and maybe it's a bad idea to publish them. Bugfix
29072 o Minor bugfixes (other):
29073 - Resolve an edge case in path weighting that could make us misweight
29074 our relay selection. Fixes bug 1203; bugfix on 0.0.8rc1.
29075 - Fix statistics on client numbers by country as seen by bridges that
29076 were broken in 0.2.2.1-alpha. Also switch to reporting full 24-hour
29077 intervals instead of variable 12-to-48-hour intervals.
29078 - After we free an internal connection structure, overwrite it
29079 with a different memory value than we use for overwriting a freed
29080 internal circuit structure. Should help with debugging. Suggested
29082 - Update our OpenSSL 0.9.8l fix so that it works with OpenSSL 0.9.8m
29085 o Removed features:
29086 - Remove the HSAuthorityRecordStats option that version 0 hidden
29087 service authorities could have used to track statistics of overall
29088 hidden service usage.
29091 Changes in version 0.2.1.22 - 2010-01-19
29092 Tor 0.2.1.22 fixes a critical privacy problem in bridge directory
29093 authorities -- it would tell you its whole history of bridge descriptors
29094 if you make the right directory request. This stable update also
29095 rotates two of the seven v3 directory authority keys and locations.
29097 o Directory authority changes:
29098 - Rotate keys (both v3 identity and relay identity) for moria1
29102 - Stop bridge directory authorities from answering dbg-stability.txt
29103 directory queries, which would let people fetch a list of all
29104 bridge identities they track. Bugfix on 0.2.1.6-alpha.
29107 Changes in version 0.2.1.21 - 2009-12-21
29108 Tor 0.2.1.21 fixes an incompatibility with the most recent OpenSSL
29109 library. If you use Tor on Linux / Unix and you're getting SSL
29110 renegotiation errors, upgrading should help. We also recommend an
29111 upgrade if you're an exit relay.
29114 - Work around a security feature in OpenSSL 0.9.8l that prevents our
29115 handshake from working unless we explicitly tell OpenSSL that we
29116 are using SSL renegotiation safely. We are, of course, but OpenSSL
29117 0.9.8l won't work unless we say we are.
29118 - Avoid crashing if the client is trying to upload many bytes and the
29119 circuit gets torn down at the same time, or if the flip side
29120 happens on the exit relay. Bugfix on 0.2.0.1-alpha; fixes bug 1150.
29123 - Do not refuse to learn about authority certs and v2 networkstatus
29124 documents that are older than the latest consensus. This bug might
29125 have degraded client bootstrapping. Bugfix on 0.2.0.10-alpha.
29126 Spotted and fixed by xmux.
29127 - Fix a couple of very-hard-to-trigger memory leaks, and one hard-to-
29128 trigger platform-specific option misparsing case found by Coverity
29130 - Fix a compilation warning on Fedora 12 by removing an impossible-to-
29131 trigger assert. Fixes bug 1173.
29134 Changes in version 0.2.2.6-alpha - 2009-11-19
29135 Tor 0.2.2.6-alpha lays the groundwork for many upcoming features:
29136 support for the new lower-footprint "microdescriptor" directory design,
29137 future-proofing our consensus format against new hash functions or
29138 other changes, and an Android port. It also makes Tor compatible with
29139 the upcoming OpenSSL 0.9.8l release, and fixes a variety of bugs.
29142 - Directory authorities can now create, vote on, and serve multiple
29143 parallel formats of directory data as part of their voting process.
29144 Partially implements Proposal 162: "Publish the consensus in
29146 - Directory authorities can now agree on and publish small summaries
29147 of router information that clients can use in place of regular
29148 server descriptors. This transition will eventually allow clients
29149 to use far less bandwidth for downloading information about the
29150 network. Begins the implementation of Proposal 158: "Clients
29151 download consensus + microdescriptors".
29152 - The directory voting system is now extensible to use multiple hash
29153 algorithms for signatures and resource selection. Newer formats
29154 are signed with SHA256, with a possibility for moving to a better
29155 hash algorithm in the future.
29156 - New DisableAllSwap option. If set to 1, Tor will attempt to lock all
29157 current and future memory pages via mlockall(). On supported
29158 platforms (modern Linux and probably BSD but not Windows or OS X),
29159 this should effectively disable any and all attempts to page out
29160 memory. This option requires that you start your Tor as root --
29161 if you use DisableAllSwap, please consider using the User option
29162 to properly reduce the privileges of your Tor.
29163 - Numerous changes, bugfixes, and workarounds from Nathan Freitas
29164 to help Tor build correctly for Android phones.
29167 - Work around a security feature in OpenSSL 0.9.8l that prevents our
29168 handshake from working unless we explicitly tell OpenSSL that we
29169 are using SSL renegotiation safely. We are, but OpenSSL 0.9.8l
29170 won't work unless we say we are.
29173 - Fix a crash bug when trying to initialize the evdns module in
29174 Libevent 2. Bugfix on 0.2.1.16-rc.
29175 - Stop logging at severity 'warn' when some other Tor client tries
29176 to establish a circuit with us using weak DH keys. It's a protocol
29177 violation, but that doesn't mean ordinary users need to hear about
29178 it. Fixes the bug part of bug 1114. Bugfix on 0.1.0.13.
29179 - Do not refuse to learn about authority certs and v2 networkstatus
29180 documents that are older than the latest consensus. This bug might
29181 have degraded client bootstrapping. Bugfix on 0.2.0.10-alpha.
29182 Spotted and fixed by xmux.
29183 - Fix numerous small code-flaws found by Coverity Scan Rung 3.
29184 - If all authorities restart at once right before a consensus vote,
29185 nobody will vote about "Running", and clients will get a consensus
29186 with no usable relays. Instead, authorities refuse to build a
29187 consensus if this happens. Bugfix on 0.2.0.10-alpha; fixes bug 1066.
29188 - If your relay can't keep up with the number of incoming create
29189 cells, it would log one warning per failure into your logs. Limit
29190 warnings to 1 per minute. Bugfix on 0.0.2pre10; fixes bug 1042.
29191 - Bridges now use "reject *:*" as their default exit policy. Bugfix
29192 on 0.2.0.3-alpha; fixes bug 1113.
29193 - Fix a memory leak on directory authorities during voting that was
29194 introduced in 0.2.2.1-alpha. Found via valgrind.
29197 Changes in version 0.2.1.20 - 2009-10-15
29198 Tor 0.2.1.20 fixes a crash bug when you're accessing many hidden
29199 services at once, prepares for more performance improvements, and
29200 fixes a bunch of smaller bugs.
29202 The Windows and OS X bundles also include a more recent Vidalia,
29203 and switch from Privoxy to Polipo.
29205 The OS X installers are now drag and drop. It's best to un-install
29206 Tor/Vidalia and then install this new bundle, rather than upgrade. If
29207 you want to upgrade, you'll need to update the paths for Tor and Polipo
29208 in the Vidalia Settings window.
29211 - Send circuit or stream sendme cells when our window has decreased
29212 by 100 cells, not when it has decreased by 101 cells. Bug uncovered
29213 by Karsten when testing the "reduce circuit window" performance
29214 patch. Bugfix on the 54th commit on Tor -- from July 2002,
29215 before the release of Tor 0.0.0. This is the new winner of the
29217 - Fix a remotely triggerable memory leak when a consensus document
29218 contains more than one signature from the same voter. Bugfix on
29220 - Avoid segfault in rare cases when finishing an introduction circuit
29221 as a client and finding out that we don't have an introduction key
29222 for it. Fixes bug 1073. Reported by Aaron Swartz.
29225 - Tor now reads the "circwindow" parameter out of the consensus,
29226 and uses that value for its circuit package window rather than the
29227 default of 1000 cells. Begins the implementation of proposal 168.
29229 o New directory authorities:
29230 - Set up urras (run by Jacob Appelbaum) as the seventh v3 directory
29232 - Move moria1 and tonga to alternate IP addresses.
29235 - Fix a signed/unsigned compile warning in 0.2.1.19.
29236 - Fix possible segmentation fault on directory authorities. Bugfix on
29238 - Fix an extremely rare infinite recursion bug that could occur if
29239 we tried to log a message after shutting down the log subsystem.
29240 Found by Matt Edman. Bugfix on 0.2.0.16-alpha.
29241 - Fix an obscure bug where hidden services on 64-bit big-endian
29242 systems might mis-read the timestamp in v3 introduce cells, and
29243 refuse to connect back to the client. Discovered by "rotor".
29244 Bugfix on 0.2.1.6-alpha.
29245 - We were triggering a CLOCK_SKEW controller status event whenever
29246 we connect via the v2 connection protocol to any relay that has
29247 a wrong clock. Instead, we should only inform the controller when
29248 it's a trusted authority that claims our clock is wrong. Bugfix
29249 on 0.2.0.20-rc; starts to fix bug 1074. Reported by SwissTorExit.
29250 - We were telling the controller about CHECKING_REACHABILITY and
29251 REACHABILITY_FAILED status events whenever we launch a testing
29252 circuit or notice that one has failed. Instead, only tell the
29253 controller when we want to inform the user of overall success or
29254 overall failure. Bugfix on 0.1.2.6-alpha. Fixes bug 1075. Reported
29256 - Don't warn when we're using a circuit that ends with a node
29257 excluded in ExcludeExitNodes, but the circuit is not used to access
29258 the outside world. This should help fix bug 1090. Bugfix on
29260 - Work around a small memory leak in some versions of OpenSSL that
29261 stopped the memory used by the hostname TLS extension from being
29265 - Add a "getinfo status/accepted-server-descriptor" controller
29266 command, which is the recommended way for controllers to learn
29267 whether our server descriptor has been successfully received by at
29268 least on directory authority. Un-recommend good-server-descriptor
29269 getinfo and status events until we have a better design for them.
29272 Changes in version 0.2.2.5-alpha - 2009-10-11
29273 Tor 0.2.2.5-alpha fixes a few compile problems in 0.2.2.4-alpha.
29276 - Make the tarball compile again. Oops. Bugfix on 0.2.2.4-alpha.
29278 o Directory authorities:
29279 - Temporarily (just for this release) move dizum to an alternate
29283 Changes in version 0.2.2.4-alpha - 2009-10-10
29284 Tor 0.2.2.4-alpha fixes more crash bugs in 0.2.2.2-alpha. It also
29285 introduces a new unit test framework, shifts directry authority
29286 addresses around to reduce the impact from recent blocking events,
29287 and fixes a few smaller bugs.
29290 - Fix several more asserts in the circuit_build_times code, for
29291 example one that causes Tor to fail to start once we have
29292 accumulated 5000 build times in the state file. Bugfixes on
29293 0.2.2.2-alpha; fixes bug 1108.
29295 o New directory authorities:
29296 - Move moria1 and Tonga to alternate IP addresses.
29299 - Log SSL state transitions at debug level during handshake, and
29300 include SSL states in error messages. This may help debug future
29301 SSL handshake issues.
29302 - Add a new "Handshake" log domain for activities that happen
29303 during the TLS handshake.
29304 - Revert to the "June 3 2009" ip-to-country file. The September one
29305 seems to have removed most US IP addresses.
29306 - Directory authorities now reject Tor relays with versions less than
29307 0.1.2.14. This step cuts out four relays from the current network,
29308 none of which are very big.
29311 - Fix a couple of smaller issues with gathering statistics. Bugfixes
29313 - Fix two memory leaks in the error case of
29314 circuit_build_times_parse_state(). Bugfix on 0.2.2.2-alpha.
29315 - Don't count one-hop circuits when we're estimating how long it
29316 takes circuits to build on average. Otherwise we'll set our circuit
29317 build timeout lower than we should. Bugfix on 0.2.2.2-alpha.
29318 - Directory authorities no longer change their opinion of, or vote on,
29319 whether a router is Running, unless they have themselves been
29320 online long enough to have some idea. Bugfix on 0.2.0.6-alpha.
29323 o Code simplifications and refactoring:
29324 - Revise our unit tests to use the "tinytest" framework, so we
29325 can run tests in their own processes, have smarter setup/teardown
29326 code, and so on. The unit test code has moved to its own
29327 subdirectory, and has been split into multiple modules.
29330 Changes in version 0.2.2.3-alpha - 2009-09-23
29331 Tor 0.2.2.3-alpha fixes a few crash bugs in 0.2.2.2-alpha.
29334 - Fix an overzealous assert in our new circuit build timeout code.
29335 Bugfix on 0.2.2.2-alpha; fixes bug 1103.
29338 - If the networkstatus consensus tells us that we should use a
29339 negative circuit package window, ignore it. Otherwise we'll
29340 believe it and then trigger an assert. Bugfix on 0.2.2.2-alpha.
29343 Changes in version 0.2.2.2-alpha - 2009-09-21
29344 Tor 0.2.2.2-alpha introduces our latest performance improvement for
29345 clients: Tor tracks the average time it takes to build a circuit, and
29346 avoids using circuits that take too long to build. For fast connections,
29347 this feature can cut your expected latency in half. For slow or flaky
29348 connections, it could ruin your Tor experience. Let us know if it does!
29351 - Tor now tracks how long it takes to build client-side circuits
29352 over time, and adapts its timeout to local network performance.
29353 Since a circuit that takes a long time to build will also provide
29354 bad performance, we get significant latency improvements by
29355 discarding the slowest 20% of circuits. Specifically, Tor creates
29356 circuits more aggressively than usual until it has enough data
29357 points for a good timeout estimate. Implements proposal 151.
29358 We are especially looking for reports (good and bad) from users with
29359 both EDGE and broadband connections that can move from broadband
29360 to EDGE and find out if the build-time data in the .tor/state gets
29361 reset without loss of Tor usability. You should also see a notice
29362 log message telling you that Tor has reset its timeout.
29363 - Directory authorities can now vote on arbitrary integer values as
29364 part of the consensus process. This is designed to help set
29365 network-wide parameters. Implements proposal 167.
29366 - Tor now reads the "circwindow" parameter out of the consensus,
29367 and uses that value for its circuit package window rather than the
29368 default of 1000 cells. Begins the implementation of proposal 168.
29371 - Fix a remotely triggerable memory leak when a consensus document
29372 contains more than one signature from the same voter. Bugfix on
29376 - Fix an extremely rare infinite recursion bug that could occur if
29377 we tried to log a message after shutting down the log subsystem.
29378 Found by Matt Edman. Bugfix on 0.2.0.16-alpha.
29379 - Fix parsing for memory or time units given without a space between
29380 the number and the unit. Bugfix on 0.2.2.1-alpha; fixes bug 1076.
29381 - A networkstatus vote must contain exactly one signature. Spec
29382 conformance issue. Bugfix on 0.2.0.3-alpha.
29383 - Fix an obscure bug where hidden services on 64-bit big-endian
29384 systems might mis-read the timestamp in v3 introduce cells, and
29385 refuse to connect back to the client. Discovered by "rotor".
29386 Bugfix on 0.2.1.6-alpha.
29387 - We were triggering a CLOCK_SKEW controller status event whenever
29388 we connect via the v2 connection protocol to any relay that has
29389 a wrong clock. Instead, we should only inform the controller when
29390 it's a trusted authority that claims our clock is wrong. Bugfix
29391 on 0.2.0.20-rc; starts to fix bug 1074. Reported by SwissTorExit.
29392 - We were telling the controller about CHECKING_REACHABILITY and
29393 REACHABILITY_FAILED status events whenever we launch a testing
29394 circuit or notice that one has failed. Instead, only tell the
29395 controller when we want to inform the user of overall success or
29396 overall failure. Bugfix on 0.1.2.6-alpha. Fixes bug 1075. Reported
29398 - Don't warn when we're using a circuit that ends with a node
29399 excluded in ExcludeExitNodes, but the circuit is not used to access
29400 the outside world. This should help fix bug 1090, but more problems
29401 remain. Bugfix on 0.2.1.6-alpha.
29402 - Work around a small memory leak in some versions of OpenSSL that
29403 stopped the memory used by the hostname TLS extension from being
29405 - Make our 'torify' script more portable; if we have only one of
29406 'torsocks' or 'tsocks' installed, don't complain to the user;
29407 and explain our warning about tsocks better.
29410 - Add a "getinfo status/accepted-server-descriptor" controller
29411 command, which is the recommended way for controllers to learn
29412 whether our server descriptor has been successfully received by at
29413 least on directory authority. Un-recommend good-server-descriptor
29414 getinfo and status events until we have a better design for them.
29415 - Update to the "September 4 2009" ip-to-country file.
29418 Changes in version 0.2.2.1-alpha - 2009-08-26
29419 Tor 0.2.2.1-alpha disables ".exit" address notation by default, allows
29420 Tor clients to bootstrap on networks where only port 80 is reachable,
29421 makes it more straightforward to support hardware crypto accelerators,
29422 and starts the groundwork for gathering stats safely at relays.
29425 - Start the process of disabling ".exit" address notation, since it
29426 can be used for a variety of esoteric application-level attacks
29427 on users. To reenable it, set "AllowDotExit 1" in your torrc. Fix
29430 o New directory authorities:
29431 - Set up urras (run by Jacob Appelbaum) as the seventh v3 directory
29435 - New AccelName and AccelDir options add support for dynamic OpenSSL
29436 hardware crypto acceleration engines.
29437 - Tor now supports tunneling all of its outgoing connections over
29438 a SOCKS proxy, using the SOCKS4Proxy and/or SOCKS5Proxy
29439 configuration options. Code by Christopher Davis.
29442 - Send circuit or stream sendme cells when our window has decreased
29443 by 100 cells, not when it has decreased by 101 cells. Bug uncovered
29444 by Karsten when testing the "reduce circuit window" performance
29445 patch. Bugfix on the 54th commit on Tor -- from July 2002,
29446 before the release of Tor 0.0.0. This is the new winner of the
29449 o New options for gathering stats safely:
29450 - Directory mirrors that set "DirReqStatistics 1" write statistics
29451 about directory requests to disk every 24 hours. As compared to the
29452 --enable-geoip-stats flag in 0.2.1.x, there are a few improvements:
29453 1) stats are written to disk exactly every 24 hours; 2) estimated
29454 shares of v2 and v3 requests are determined as mean values, not at
29455 the end of a measurement period; 3) unresolved requests are listed
29456 with country code '??'; 4) directories also measure download times.
29457 - Exit nodes that set "ExitPortStatistics 1" write statistics on the
29458 number of exit streams and transferred bytes per port to disk every
29460 - Relays that set "CellStatistics 1" write statistics on how long
29461 cells spend in their circuit queues to disk every 24 hours.
29462 - Entry nodes that set "EntryStatistics 1" write statistics on the
29463 rough number and origins of connecting clients to disk every 24
29465 - Relays that write any of the above statistics to disk and set
29466 "ExtraInfoStatistics 1" include the past 24 hours of statistics in
29467 their extra-info documents.
29470 - New --digests command-line switch to output the digests of the
29471 source files Tor was built with.
29472 - The "torify" script now uses torsocks where available.
29473 - The memarea code now uses a sentinel value at the end of each area
29474 to make sure nothing writes beyond the end of an area. This might
29475 help debug some conceivable causes of bug 930.
29476 - Time and memory units in the configuration file can now be set to
29477 fractional units. For example, "2.5 GB" is now a valid value for
29479 - Certain Tor clients (such as those behind check.torproject.org) may
29480 want to fetch the consensus in an extra early manner. To enable this
29481 a user may now set FetchDirInfoExtraEarly to 1. This also depends on
29482 setting FetchDirInfoEarly to 1. Previous behavior will stay the same
29483 as only certain clients who must have this information sooner should
29485 - Instead of adding the svn revision to the Tor version string, report
29486 the git commit (when we're building from a git checkout).
29489 - If any of the v3 certs we download are unparseable, we should
29490 actually notice the failure so we don't retry indefinitely. Bugfix
29491 on 0.2.0.x; reported by "rotator".
29492 - If the cached cert file is unparseable, warn but don't exit.
29493 - Fix possible segmentation fault on directory authorities. Bugfix on
29495 - When Tor fails to parse a descriptor of any kind, dump it to disk.
29496 Might help diagnosing bug 1051.
29498 o Deprecated and removed features:
29499 - The controller no longer accepts the old obsolete "addr-mappings/"
29500 or "unregistered-servers-" GETINFO values.
29501 - Hidden services no longer publish version 0 descriptors, and clients
29502 do not request or use version 0 descriptors. However, the old hidden
29503 service authorities still accept and serve version 0 descriptors
29504 when contacted by older hidden services/clients.
29505 - The EXTENDED_EVENTS and VERBOSE_NAMES controller features are now
29506 always on; using them is necessary for correct forward-compatible
29508 - Remove support for .noconnect style addresses. Nobody was using
29509 them, and they provided another avenue for detecting Tor users
29510 via application-level web tricks.
29512 o Packaging changes:
29513 - Upgrade Vidalia from 0.1.15 to 0.2.3 in the Windows and OS X
29514 installer bundles. See
29515 https://trac.vidalia-project.net/browser/vidalia/tags/vidalia-0.2.3/CHANGELOG
29516 for details of what's new in Vidalia 0.2.3.
29517 - Windows Vidalia Bundle: update Privoxy from 3.0.6 to 3.0.14-beta.
29518 - OS X Vidalia Bundle: move to Polipo 1.0.4 with Tor specific
29519 configuration file, rather than the old Privoxy.
29520 - OS X Vidalia Bundle: Vidalia, Tor, and Polipo are compiled as
29521 x86-only for better compatibility with OS X 10.6, aka Snow Leopard.
29522 - OS X Tor Expert Bundle: Tor is compiled as x86-only for
29523 better compatibility with OS X 10.6, aka Snow Leopard.
29524 - OS X Vidalia Bundle: The multi-package installer is now replaced
29525 by a simple drag and drop to the /Applications folder. This change
29526 occurred with the upgrade to Vidalia 0.2.3.
29529 Changes in version 0.2.1.19 - 2009-07-28
29530 Tor 0.2.1.19 fixes a major bug with accessing and providing hidden
29531 services on Tor 0.2.1.3-alpha through 0.2.1.18.
29534 - Make accessing hidden services on 0.2.1.x work right again.
29535 Bugfix on 0.2.1.3-alpha; workaround for bug 1038. Diagnosis and
29536 part of patch provided by "optimist".
29539 - When a relay/bridge is writing out its identity key fingerprint to
29540 the "fingerprint" file and to its logs, write it without spaces. Now
29541 it will look like the fingerprints in our bridges documentation,
29542 and confuse fewer users.
29545 - Relays no longer publish a new server descriptor if they change
29546 their MaxAdvertisedBandwidth config option but it doesn't end up
29547 changing their advertised bandwidth numbers. Bugfix on 0.2.0.28-rc;
29548 fixes bug 1026. Patch from Sebastian.
29549 - Avoid leaking memory every time we get a create cell but we have
29550 so many already queued that we refuse it. Bugfix on 0.2.0.19-alpha;
29551 fixes bug 1034. Reported by BarkerJr.
29554 Changes in version 0.2.1.18 - 2009-07-24
29555 Tor 0.2.1.18 lays the foundations for performance improvements,
29556 adds status events to help users diagnose bootstrap problems, adds
29557 optional authentication/authorization for hidden services, fixes a
29558 variety of potential anonymity problems, and includes a huge pile of
29559 other features and bug fixes.
29562 - Add LIBS=-lrt to Makefile.am so the Tor RPMs use a static libevent.
29565 Changes in version 0.2.1.17-rc - 2009-07-07
29566 Tor 0.2.1.17-rc marks the fourth -- and hopefully last -- release
29567 candidate for the 0.2.1.x series. It lays the groundwork for further
29568 client performance improvements, and also fixes a big bug with directory
29569 authorities that were causing them to assign Guard and Stable flags
29572 The Windows bundles also finally include the geoip database that we
29573 thought we'd been shipping since 0.2.0.x (oops), and the OS X bundles
29574 should actually install Torbutton rather than giving you a cryptic
29575 failure message (oops).
29578 - Clients now use the bandwidth values in the consensus, rather than
29579 the bandwidth values in each relay descriptor. This approach opens
29580 the door to more accurate bandwidth estimates once the directory
29581 authorities start doing active measurements. Implements more of
29585 - When Tor clients restart after 1-5 days, they discard all their
29586 cached descriptors as too old, but they still use the cached
29587 consensus document. This approach is good for robustness, but
29588 bad for performance: since they don't know any bandwidths, they
29589 end up choosing at random rather than weighting their choice by
29590 speed. Fixed by the above feature of putting bandwidths in the
29591 consensus. Bugfix on 0.2.0.x.
29592 - Directory authorities were neglecting to mark relays down in their
29593 internal histories if the relays fall off the routerlist without
29594 ever being found unreachable. So there were relays in the histories
29595 that haven't been seen for eight months, and are listed as being
29596 up for eight months. This wreaked havoc on the "median wfu"
29597 and "median mtbf" calculations, in turn making Guard and Stable
29598 flags very wrong, hurting network performance. Fixes bugs 696 and
29599 969. Bugfix on 0.2.0.6-alpha.
29602 - Serve the DirPortFrontPage page even when we have been approaching
29603 our quotas recently. Fixes bug 1013; bugfix on 0.2.1.8-alpha.
29604 - The control port would close the connection before flushing long
29605 replies, such as the network consensus, if a QUIT command was issued
29606 before the reply had completed. Now, the control port flushes all
29607 pending replies before closing the connection. Also fixed a spurious
29608 warning when a QUIT command is issued after a malformed or rejected
29609 AUTHENTICATE command, but before the connection was closed. Patch
29610 by Marcus Griep. Bugfix on 0.2.0.x; fixes bugs 1015 and 1016.
29611 - When we can't find an intro key for a v2 hidden service descriptor,
29612 fall back to the v0 hidden service descriptor and log a bug message.
29613 Workaround for bug 1024.
29614 - Fix a log message that did not respect the SafeLogging option.
29618 - If we're a relay and we change our IP address, be more verbose
29619 about the reason that made us change. Should help track down
29620 further bugs for relays on dynamic IP addresses.
29623 Changes in version 0.2.0.35 - 2009-06-24
29625 - Avoid crashing in the presence of certain malformed descriptors.
29626 Found by lark, and by automated fuzzing.
29627 - Fix an edge case where a malicious exit relay could convince a
29628 controller that the client's DNS question resolves to an internal IP
29629 address. Bug found and fixed by "optimist"; bugfix on 0.1.2.8-beta.
29632 - Finally fix the bug where dynamic-IP relays disappear when their
29633 IP address changes: directory mirrors were mistakenly telling
29634 them their old address if they asked via begin_dir, so they
29635 never got an accurate answer about their new address, so they
29636 just vanished after a day. For belt-and-suspenders, relays that
29637 don't set Address in their config now avoid using begin_dir for
29638 all direct connections. Should fix bugs 827, 883, and 900.
29639 - Fix a timing-dependent, allocator-dependent, DNS-related crash bug
29640 that would occur on some exit nodes when DNS failures and timeouts
29641 occurred in certain patterns. Fix for bug 957.
29644 - When starting with a cache over a few days old, do not leak
29645 memory for the obsolete router descriptors in it. Bugfix on
29646 0.2.0.33; fixes bug 672.
29647 - Hidden service clients didn't use a cached service descriptor that
29648 was older than 15 minutes, but wouldn't fetch a new one either,
29649 because there was already one in the cache. Now, fetch a v2
29650 descriptor unless the same descriptor was added to the cache within
29651 the last 15 minutes. Fixes bug 997; reported by Marcus Griep.
29654 Changes in version 0.2.1.16-rc - 2009-06-20
29655 Tor 0.2.1.16-rc speeds up performance for fast exit relays, and fixes
29656 a bunch of minor bugs.
29659 - Fix an edge case where a malicious exit relay could convince a
29660 controller that the client's DNS question resolves to an internal IP
29661 address. Bug found and fixed by "optimist"; bugfix on 0.1.2.8-beta.
29663 o Major performance improvements (on 0.2.0.x):
29664 - Disable and refactor some debugging checks that forced a linear scan
29665 over the whole server-side DNS cache. These accounted for over 50%
29666 of CPU time on a relatively busy exit node's gprof profile. Found
29668 - Disable some debugging checks that appeared in exit node profile
29672 - Update to the "June 3 2009" ip-to-country file.
29673 - Do not have tor-resolve automatically refuse all .onion addresses;
29674 if AutomapHostsOnResolve is set in your torrc, this will work fine.
29676 o Minor bugfixes (on 0.2.0.x):
29677 - Log correct error messages for DNS-related network errors on
29679 - Fix a race condition that could cause crashes or memory corruption
29680 when running as a server with a controller listening for log
29682 - Avoid crashing when we have a policy specified in a DirPolicy or
29683 SocksPolicy or ReachableAddresses option with ports set on it,
29684 and we re-load the policy. May fix bug 996.
29685 - Hidden service clients didn't use a cached service descriptor that
29686 was older than 15 minutes, but wouldn't fetch a new one either,
29687 because there was already one in the cache. Now, fetch a v2
29688 descriptor unless the same descriptor was added to the cache within
29689 the last 15 minutes. Fixes bug 997; reported by Marcus Griep.
29691 o Minor bugfixes (on 0.2.1.x):
29692 - Don't warn users about low port and hibernation mix when they
29693 provide a *ListenAddress directive to fix that. Bugfix on
29695 - When switching back and forth between bridge mode, do not start
29696 gathering GeoIP data until two hours have passed.
29697 - Do not complain that the user has requested an excluded node as
29698 an exit when the node is not really an exit. This could happen
29699 because the circuit was for testing, or an introduction point.
29703 Changes in version 0.2.1.15-rc - 2009-05-25
29704 Tor 0.2.1.15-rc marks the second release candidate for the 0.2.1.x
29705 series. It fixes a major bug on fast exit relays, as well as a variety
29706 of more minor bugs.
29708 o Major bugfixes (on 0.2.0.x):
29709 - Fix a timing-dependent, allocator-dependent, DNS-related crash bug
29710 that would occur on some exit nodes when DNS failures and timeouts
29711 occurred in certain patterns. Fix for bug 957.
29713 o Minor bugfixes (on 0.2.0.x):
29714 - Actually return -1 in the error case for read_bandwidth_usage().
29715 Harmless bug, since we currently don't care about the return value
29716 anywhere. Bugfix on 0.2.0.9-alpha.
29717 - Provide a more useful log message if bug 977 (related to buffer
29718 freelists) ever reappears, and do not crash right away.
29719 - Fix an assertion failure on 64-bit platforms when we allocated
29720 memory right up to the end of a memarea, then realigned the memory
29721 one step beyond the end. Fixes a possible cause of bug 930.
29722 - Protect the count of open sockets with a mutex, so we can't
29723 corrupt it when two threads are closing or opening sockets at once.
29724 Fix for bug 939. Bugfix on 0.2.0.1-alpha.
29725 - Don't allow a bridge to publish its router descriptor to a
29726 non-bridge directory authority. Fixes part of bug 932.
29727 - When we change to or from being a bridge, reset our counts of
29728 client usage by country. Fixes bug 932.
29729 - Fix a bug that made stream bandwidth get misreported to the
29731 - Stop using malloc_usable_size() to use more area than we had
29732 actually allocated: it was safe, but made valgrind really unhappy.
29733 - Fix a memory leak when v3 directory authorities load their keys
29734 and cert from disk. Bugfix on 0.2.0.1-alpha.
29736 o Minor bugfixes (on 0.2.1.x):
29737 - Fix use of freed memory when deciding to mark a non-addable
29738 descriptor as never-downloadable. Bugfix on 0.2.1.9-alpha.
29741 Changes in version 0.2.1.14-rc - 2009-04-12
29742 Tor 0.2.1.14-rc marks the first release candidate for the 0.2.1.x
29743 series. It begins fixing some major performance problems, and also
29744 finally addresses the bug that was causing relays on dynamic IP
29745 addresses to fall out of the directory.
29748 - Clients replace entry guards that were chosen more than a few months
29749 ago. This change should significantly improve client performance,
29750 especially once more people upgrade, since relays that have been
29751 a guard for a long time are currently overloaded.
29753 o Major bugfixes (on 0.2.0):
29754 - Finally fix the bug where dynamic-IP relays disappear when their
29755 IP address changes: directory mirrors were mistakenly telling
29756 them their old address if they asked via begin_dir, so they
29757 never got an accurate answer about their new address, so they
29758 just vanished after a day. For belt-and-suspenders, relays that
29759 don't set Address in their config now avoid using begin_dir for
29760 all direct connections. Should fix bugs 827, 883, and 900.
29761 - Relays were falling out of the networkstatus consensus for
29762 part of a day if they changed their local config but the
29763 authorities discarded their new descriptor as "not sufficiently
29764 different". Now directory authorities accept a descriptor as changed
29765 if bandwidthrate or bandwidthburst changed. Partial fix for bug 962;
29766 patch by Sebastian.
29767 - Avoid crashing in the presence of certain malformed descriptors.
29768 Found by lark, and by automated fuzzing.
29771 - When generating circuit events with verbose nicknames for
29772 controllers, try harder to look up nicknames for routers on a
29773 circuit. (Previously, we would look in the router descriptors we had
29774 for nicknames, but not in the consensus.) Partial fix for bug 941.
29775 - If the bridge config line doesn't specify a port, assume 443.
29776 This makes bridge lines a bit smaller and easier for users to
29778 - Raise the minimum bandwidth to be a relay from 20000 bytes to 20480
29779 bytes (aka 20KB/s), to match our documentation. Also update
29780 directory authorities so they always assign the Fast flag to relays
29781 with 20KB/s of capacity. Now people running relays won't suddenly
29782 find themselves not seeing any use, if the network gets faster
29784 - Update to the "April 3 2009" ip-to-country file.
29787 - Avoid trying to print raw memory to the logs when we decide to
29788 give up on downloading a given relay descriptor. Bugfix on
29790 - In tor-resolve, when the Tor client to use is specified by
29791 <hostname>:<port>, actually use the specified port rather than
29792 defaulting to 9050. Bugfix on 0.2.1.6-alpha.
29793 - Make directory usage recording work again. Bugfix on 0.2.1.6-alpha.
29794 - When starting with a cache over a few days old, do not leak
29795 memory for the obsolete router descriptors in it. Bugfix on
29797 - Avoid double-free on list of successfully uploaded hidden
29798 service discriptors. Fix for bug 948. Bugfix on 0.2.1.6-alpha.
29799 - Change memarea_strndup() implementation to work even when
29800 duplicating a string at the end of a page. This bug was
29801 harmless for now, but could have meant crashes later. Fix by
29802 lark. Bugfix on 0.2.1.1-alpha.
29803 - Limit uploaded directory documents to be 16M rather than 500K.
29804 The directory authorities were refusing v3 consensus votes from
29805 other authorities, since the votes are now 504K. Fixes bug 959;
29806 bugfix on 0.0.2pre17 (where we raised it from 50K to 500K ;).
29807 - Directory authorities should never send a 503 "busy" response to
29808 requests for votes or keys. Bugfix on 0.2.0.8-alpha; exposed by
29812 Changes in version 0.2.1.13-alpha - 2009-03-09
29813 Tor 0.2.1.13-alpha includes another big pile of minor bugfixes and
29814 cleanups. We're finally getting close to a release candidate.
29817 - Correctly update the list of which countries we exclude as
29818 exits, when the GeoIP file is loaded or reloaded. Diagnosed by
29819 lark. Bugfix on 0.2.1.6-alpha.
29821 o Minor bugfixes (on 0.2.0.x and earlier):
29822 - Automatically detect MacOSX versions earlier than 10.4.0, and
29823 disable kqueue from inside Tor when running with these versions.
29824 We previously did this from the startup script, but that was no
29825 help to people who didn't use the startup script. Resolves bug 863.
29826 - When we had picked an exit node for a connection, but marked it as
29827 "optional", and it turned out we had no onion key for the exit,
29828 stop wanting that exit and try again. This situation may not
29829 be possible now, but will probably become feasible with proposal
29830 158. Spotted by rovv. Fixes another case of bug 752.
29831 - Clients no longer cache certificates for authorities they do not
29832 recognize. Bugfix on 0.2.0.9-alpha.
29833 - When we can't transmit a DNS request due to a network error, retry
29834 it after a while, and eventually transmit a failing response to
29835 the RESOLVED cell. Bugfix on 0.1.2.5-alpha.
29836 - If the controller claimed responsibility for a stream, but that
29837 stream never finished making its connection, it would live
29838 forever in circuit_wait state. Now we close it after SocksTimeout
29839 seconds. Bugfix on 0.1.2.7-alpha; reported by Mike Perry.
29840 - Drop begin cells to a hidden service if they come from the middle
29841 of a circuit. Patch from lark.
29842 - When we erroneously receive two EXTEND cells for the same circuit
29843 ID on the same connection, drop the second. Patch from lark.
29844 - Fix a crash that occurs on exit nodes when a nameserver request
29845 timed out. Bugfix on 0.1.2.1-alpha; our CLEAR debugging code had
29846 been suppressing the bug since 0.1.2.10-alpha. Partial fix for
29848 - Do not assume that a stack-allocated character array will be
29849 64-bit aligned on platforms that demand that uint64_t access is
29850 aligned. Possible fix for bug 604.
29851 - Parse dates and IPv4 addresses in a locale- and libc-independent
29852 manner, to avoid platform-dependent behavior on malformed input.
29853 - Build correctly when configured to build outside the main source
29854 path. Patch from Michael Gold.
29855 - We were already rejecting relay begin cells with destination port
29856 of 0. Now also reject extend cells with destination port or address
29857 of 0. Suggested by lark.
29859 o Minor bugfixes (on 0.2.1.x):
29860 - Don't re-extend introduction circuits if we ran out of RELAY_EARLY
29861 cells. Bugfix on 0.2.1.3-alpha. Fixes more of bug 878.
29862 - If we're an exit node, scrub the IP address to which we are exiting
29863 in the logs. Bugfix on 0.2.1.8-alpha.
29866 - On Linux, use the prctl call to re-enable core dumps when the user
29868 - New controller event NEWCONSENSUS that lists the networkstatus
29869 lines for every recommended relay. Now controllers like Torflow
29870 can keep up-to-date on which relays they should be using.
29871 - Update to the "February 26 2009" ip-to-country file.
29874 Changes in version 0.2.0.34 - 2009-02-08
29875 Tor 0.2.0.34 features several more security-related fixes. You should
29876 upgrade, especially if you run an exit relay (remote crash) or a
29877 directory authority (remote infinite loop), or you're on an older
29878 (pre-XP) or not-recently-patched Windows (remote exploit).
29880 This release marks end-of-life for Tor 0.1.2.x. Those Tor versions
29881 have many known flaws, and nobody should be using them. You should
29882 upgrade. If you're using a Linux or BSD and its packages are obsolete,
29883 stop using those packages and upgrade anyway.
29886 - Fix an infinite-loop bug on handling corrupt votes under certain
29887 circumstances. Bugfix on 0.2.0.8-alpha.
29888 - Fix a temporary DoS vulnerability that could be performed by
29889 a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark.
29890 - Avoid a potential crash on exit nodes when processing malformed
29891 input. Remote DoS opportunity. Bugfix on 0.2.0.33.
29892 - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid.
29893 Spec conformance issue. Bugfix on Tor 0.0.2pre27.
29896 - Fix compilation on systems where time_t is a 64-bit integer.
29897 Patch from Matthias Drochner.
29898 - Don't consider expiring already-closed client connections. Fixes
29899 bug 893. Bugfix on 0.0.2pre20.
29902 Changes in version 0.2.1.12-alpha - 2009-02-08
29903 Tor 0.2.1.12-alpha features several more security-related fixes. You
29904 should upgrade, especially if you run an exit relay (remote crash) or
29905 a directory authority (remote infinite loop), or you're on an older
29906 (pre-XP) or not-recently-patched Windows (remote exploit). It also
29907 includes a big pile of minor bugfixes and cleanups.
29910 - Fix an infinite-loop bug on handling corrupt votes under certain
29911 circumstances. Bugfix on 0.2.0.8-alpha.
29912 - Fix a temporary DoS vulnerability that could be performed by
29913 a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark.
29914 - Avoid a potential crash on exit nodes when processing malformed
29915 input. Remote DoS opportunity. Bugfix on 0.2.1.7-alpha.
29918 - Let controllers actually ask for the "clients_seen" event for
29919 getting usage summaries on bridge relays. Bugfix on 0.2.1.10-alpha;
29920 reported by Matt Edman.
29921 - Fix a compile warning on OSX Panther. Fixes bug 913; bugfix against
29923 - Fix a bug in address parsing that was preventing bridges or hidden
29924 service targets from being at IPv6 addresses.
29925 - Solve a bug that kept hardware crypto acceleration from getting
29926 enabled when accounting was turned on. Fixes bug 907. Bugfix on
29928 - Remove a bash-ism from configure.in to build properly on non-Linux
29929 platforms. Bugfix on 0.2.1.1-alpha.
29930 - Fix code so authorities _actually_ send back X-Descriptor-Not-New
29931 headers. Bugfix on 0.2.0.10-alpha.
29932 - Don't consider expiring already-closed client connections. Fixes
29933 bug 893. Bugfix on 0.0.2pre20.
29934 - Fix another interesting corner-case of bug 891 spotted by rovv:
29935 Previously, if two hosts had different amounts of clock drift, and
29936 one of them created a new connection with just the wrong timing,
29937 the other might decide to deprecate the new connection erroneously.
29938 Bugfix on 0.1.1.13-alpha.
29939 - Resolve a very rare crash bug that could occur when the user forced
29940 a nameserver reconfiguration during the middle of a nameserver
29941 probe. Fixes bug 526. Bugfix on 0.1.2.1-alpha.
29942 - Support changing value of ServerDNSRandomizeCase during SIGHUP.
29943 Bugfix on 0.2.1.7-alpha.
29944 - If we're using bridges and our network goes away, be more willing
29945 to forgive our bridges and try again when we get an application
29946 request. Bugfix on 0.2.0.x.
29949 - Support platforms where time_t is 64 bits long. (Congratulations,
29950 NetBSD!) Patch from Matthias Drochner.
29951 - Add a 'getinfo status/clients-seen' controller command, in case
29952 controllers want to hear clients_seen events but connect late.
29955 - Disable GCC's strict alias optimization by default, to avoid the
29956 likelihood of its introducing subtle bugs whenever our code violates
29957 the letter of C99's alias rules.
29960 Changes in version 0.2.0.33 - 2009-01-21
29961 Tor 0.2.0.33 fixes a variety of bugs that were making relays less
29962 useful to users. It also finally fixes a bug where a relay or client
29963 that's been off for many days would take a long time to bootstrap.
29965 This update also fixes an important security-related bug reported by
29966 Ilja van Sprundel. You should upgrade. (We'll send out more details
29967 about the bug once people have had some time to upgrade.)
29970 - Fix a heap-corruption bug that may be remotely triggerable on
29971 some platforms. Reported by Ilja van Sprundel.
29974 - When a stream at an exit relay is in state "resolving" or
29975 "connecting" and it receives an "end" relay cell, the exit relay
29976 would silently ignore the end cell and not close the stream. If
29977 the client never closes the circuit, then the exit relay never
29978 closes the TCP connection. Bug introduced in Tor 0.1.2.1-alpha;
29979 reported by "wood".
29980 - When sending CREATED cells back for a given circuit, use a 64-bit
29981 connection ID to find the right connection, rather than an addr:port
29982 combination. Now that we can have multiple OR connections between
29983 the same ORs, it is no longer possible to use addr:port to uniquely
29984 identify a connection.
29985 - Bridge relays that had DirPort set to 0 would stop fetching
29986 descriptors shortly after startup, and then briefly resume
29987 after a new bandwidth test and/or after publishing a new bridge
29988 descriptor. Bridge users that try to bootstrap from them would
29989 get a recent networkstatus but would get descriptors from up to
29990 18 hours earlier, meaning most of the descriptors were obsolete
29991 already. Reported by Tas; bugfix on 0.2.0.13-alpha.
29992 - Prevent bridge relays from serving their 'extrainfo' document
29993 to anybody who asks, now that extrainfo docs include potentially
29994 sensitive aggregated client geoip summaries. Bugfix on
29996 - If the cached networkstatus consensus is more than five days old,
29997 discard it rather than trying to use it. In theory it could be
29998 useful because it lists alternate directory mirrors, but in practice
29999 it just means we spend many minutes trying directory mirrors that
30000 are long gone from the network. Also discard router descriptors as
30001 we load them if they are more than five days old, since the onion
30002 key is probably wrong by now. Bugfix on 0.2.0.x. Fixes bug 887.
30005 - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
30006 could make gcc generate non-functional binary search code. Bugfix
30008 - Build correctly on platforms without socklen_t.
30009 - Compile without warnings on solaris.
30010 - Avoid potential crash on internal error during signature collection.
30011 Fixes bug 864. Patch from rovv.
30012 - Correct handling of possible malformed authority signing key
30013 certificates with internal signature types. Fixes bug 880.
30014 Bugfix on 0.2.0.3-alpha.
30015 - Fix a hard-to-trigger resource leak when logging credential status.
30017 - When we can't initialize DNS because the network is down, do not
30018 automatically stop Tor from starting. Instead, we retry failed
30019 dns_init() every 10 minutes, and change the exit policy to reject
30020 *:* until one succeeds. Fixes bug 691.
30021 - Use 64 bits instead of 32 bits for connection identifiers used with
30022 the controller protocol, to greatly reduce risk of identifier reuse.
30023 - When we're choosing an exit node for a circuit, and we have
30024 no pending streams, choose a good general exit rather than one that
30025 supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
30026 - Fix another case of assuming, when a specific exit is requested,
30027 that we know more than the user about what hosts it allows.
30028 Fixes one case of bug 752. Patch from rovv.
30029 - Clip the MaxCircuitDirtiness config option to a minimum of 10
30030 seconds. Warn the user if lower values are given in the
30031 configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
30032 - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
30033 user if lower values are given in the configuration. Bugfix on
30034 0.1.1.17-rc. Patch by Sebastian.
30035 - Fix a memory leak when we decline to add a v2 rendezvous descriptor to
30036 the cache because we already had a v0 descriptor with the same ID.
30037 Bugfix on 0.2.0.18-alpha.
30038 - Fix a race condition when freeing keys shared between main thread
30039 and CPU workers that could result in a memory leak. Bugfix on
30040 0.1.0.1-rc. Fixes bug 889.
30041 - Send a valid END cell back when a client tries to connect to a
30042 nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
30043 840. Patch from rovv.
30044 - Check which hops rendezvous stream cells are associated with to
30045 prevent possible guess-the-streamid injection attacks from
30046 intermediate hops. Fixes another case of bug 446. Based on patch
30048 - If a broken client asks a non-exit router to connect somewhere,
30049 do not even do the DNS lookup before rejecting the connection.
30050 Fixes another case of bug 619. Patch from rovv.
30051 - When a relay gets a create cell it can't decrypt (e.g. because it's
30052 using the wrong onion key), we were dropping it and letting the
30053 client time out. Now actually answer with a destroy cell. Fixes
30054 bug 904. Bugfix on 0.0.2pre8.
30056 o Minor bugfixes (hidden services):
30057 - Do not throw away existing introduction points on SIGHUP. Bugfix on
30058 0.0.6pre1. Patch by Karsten. Fixes bug 874.
30061 - Report the case where all signatures in a detached set are rejected
30062 differently than the case where there is an error handling the
30064 - When we realize that another process has modified our cached
30065 descriptors, print out a more useful error message rather than
30066 triggering an assertion. Fixes bug 885. Patch from Karsten.
30067 - Implement the 0x20 hack to better resist DNS poisoning: set the
30068 case on outgoing DNS requests randomly, and reject responses that do
30069 not match the case correctly. This logic can be disabled with the
30070 ServerDNSRandomizeCase setting, if you are using one of the 0.3%
30071 of servers that do not reliably preserve case in replies. See
30072 "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
30074 - Check DNS replies for more matching fields to better resist DNS
30076 - Never use OpenSSL compression: it wastes RAM and CPU trying to
30077 compress cells, which are basically all encrypted, compressed, or
30081 Changes in version 0.2.1.11-alpha - 2009-01-20
30082 Tor 0.2.1.11-alpha finishes fixing the "if your Tor is off for a
30083 week it will take a long time to bootstrap again" bug. It also fixes
30084 an important security-related bug reported by Ilja van Sprundel. You
30085 should upgrade. (We'll send out more details about the bug once people
30086 have had some time to upgrade.)
30089 - Fix a heap-corruption bug that may be remotely triggerable on
30090 some platforms. Reported by Ilja van Sprundel.
30093 - Discard router descriptors as we load them if they are more than
30094 five days old. Otherwise if Tor is off for a long time and then
30095 starts with cached descriptors, it will try to use the onion
30096 keys in those obsolete descriptors when building circuits. Bugfix
30097 on 0.2.0.x. Fixes bug 887.
30100 - Try to make sure that the version of Libevent we're running with
30101 is binary-compatible with the one we built with. May address bug
30103 - Make setting ServerDNSRandomizeCase to 0 actually work. Bugfix
30104 for bug 905. Bugfix on 0.2.1.7-alpha.
30105 - Add a new --enable-local-appdata configuration switch to change
30106 the default location of the datadir on win32 from APPDATA to
30107 LOCAL_APPDATA. In the future, we should migrate to LOCAL_APPDATA
30108 entirely. Patch from coderman.
30111 - Make outbound DNS packets respect the OutboundBindAddress setting.
30112 Fixes the bug part of bug 798. Bugfix on 0.1.2.2-alpha.
30113 - When our circuit fails at the first hop (e.g. we get a destroy
30114 cell back), avoid using that OR connection anymore, and also
30115 tell all the one-hop directory requests waiting for it that they
30116 should fail. Bugfix on 0.2.1.3-alpha.
30117 - In the torify(1) manpage, mention that tsocks will leak your
30121 Changes in version 0.2.1.10-alpha - 2009-01-06
30122 Tor 0.2.1.10-alpha fixes two major bugs in bridge relays (one that
30123 would make the bridge relay not so useful if it had DirPort set to 0,
30124 and one that could let an attacker learn a little bit of information
30125 about the bridge's users), and a bug that would cause your Tor relay
30126 to ignore a circuit create request it can't decrypt (rather than reply
30127 with an error). It also fixes a wide variety of other bugs.
30130 - If the cached networkstatus consensus is more than five days old,
30131 discard it rather than trying to use it. In theory it could
30132 be useful because it lists alternate directory mirrors, but in
30133 practice it just means we spend many minutes trying directory
30134 mirrors that are long gone from the network. Helps bug 887 a bit;
30136 - Bridge relays that had DirPort set to 0 would stop fetching
30137 descriptors shortly after startup, and then briefly resume
30138 after a new bandwidth test and/or after publishing a new bridge
30139 descriptor. Bridge users that try to bootstrap from them would
30140 get a recent networkstatus but would get descriptors from up to
30141 18 hours earlier, meaning most of the descriptors were obsolete
30142 already. Reported by Tas; bugfix on 0.2.0.13-alpha.
30143 - Prevent bridge relays from serving their 'extrainfo' document
30144 to anybody who asks, now that extrainfo docs include potentially
30145 sensitive aggregated client geoip summaries. Bugfix on
30149 - New controller event "clients_seen" to report a geoip-based summary
30150 of which countries we've seen clients from recently. Now controllers
30151 like Vidalia can show bridge operators that they're actually making
30153 - Build correctly against versions of OpenSSL 0.9.8 or later built
30154 without support for deprecated functions.
30155 - Update to the "December 19 2008" ip-to-country file.
30157 o Minor bugfixes (on 0.2.0.x):
30158 - Authorities now vote for the Stable flag for any router whose
30159 weighted MTBF is at least 5 days, regardless of the mean MTBF.
30160 - Do not remove routers as too old if we do not have any consensus
30161 document. Bugfix on 0.2.0.7-alpha.
30162 - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid.
30163 Spec conformance issue. Bugfix on Tor 0.0.2pre27.
30164 - When an exit relay resolves a stream address to a local IP address,
30165 do not just keep retrying that same exit relay over and
30166 over. Instead, just close the stream. Addresses bug 872. Bugfix
30167 on 0.2.0.32. Patch from rovv.
30168 - If a hidden service sends us an END cell, do not consider
30169 retrying the connection; just close it. Patch from rovv.
30170 - When we made bridge authorities stop serving bridge descriptors over
30171 unencrypted links, we also broke DirPort reachability testing for
30172 bridges. So bridges with a non-zero DirPort were printing spurious
30173 warns to their logs. Bugfix on 0.2.0.16-alpha. Fixes bug 709.
30174 - When a relay gets a create cell it can't decrypt (e.g. because it's
30175 using the wrong onion key), we were dropping it and letting the
30176 client time out. Now actually answer with a destroy cell. Fixes
30177 bug 904. Bugfix on 0.0.2pre8.
30178 - Squeeze 2-5% out of client performance (according to oprofile) by
30179 improving the implementation of some policy-manipulation functions.
30181 o Minor bugfixes (on 0.2.1.x):
30182 - Make get_interface_address() function work properly again; stop
30183 guessing the wrong parts of our address as our address.
30184 - Do not cannibalize a circuit if we're out of RELAY_EARLY cells to
30185 send on that circuit. Otherwise we might violate the proposal-110
30186 limit. Bugfix on 0.2.1.3-alpha. Partial fix for bug 878. Diagnosis
30188 - When we're sending non-EXTEND cells to the first hop in a circuit,
30189 for example to use an encrypted directory connection, we don't need
30190 to use RELAY_EARLY cells: the first hop knows what kind of cell
30191 it is, and nobody else can even see the cell type. Conserving
30192 RELAY_EARLY cells makes it easier to cannibalize circuits like
30194 - Stop logging nameserver addresses in reverse order.
30195 - If we are retrying a directory download slowly over and over, do
30196 not automatically give up after the 254th failure. Bugfix on
30198 - Resume reporting accurate "stream end" reasons to the local control
30199 port. They were lost in the changes for Proposal 148. Bugfix on
30202 o Deprecated and removed features:
30203 - The old "tor --version --version" command, which would print out
30204 the subversion "Id" of most of the source files, is now removed. It
30205 turned out to be less useful than we'd expected, and harder to
30208 o Code simplifications and refactoring:
30209 - Change our header file guard macros to be less likely to conflict
30210 with system headers. Adam Langley noticed that we were conflicting
30211 with log.h on Android.
30212 - Tool-assisted documentation cleanup. Nearly every function or
30213 static variable in Tor should have its own documentation now.
30216 Changes in version 0.2.1.9-alpha - 2008-12-25
30217 Tor 0.2.1.9-alpha fixes many more bugs, some of them security-related.
30219 o New directory authorities:
30220 - gabelmoo (the authority run by Karsten Loesing) now has a new
30224 - Never use a connection with a mismatched address to extend a
30225 circuit, unless that connection is canonical. A canonical
30226 connection is one whose address is authenticated by the router's
30227 identity key, either in a NETINFO cell or in a router descriptor.
30228 - Avoid a possible memory corruption bug when receiving hidden service
30229 descriptors. Bugfix on 0.2.1.6-alpha.
30232 - Fix a logic error that would automatically reject all but the first
30233 configured DNS server. Bugfix on 0.2.1.5-alpha. Possible fix for
30234 part of bug 813/868. Bug spotted by coderman.
30235 - When a stream at an exit relay is in state "resolving" or
30236 "connecting" and it receives an "end" relay cell, the exit relay
30237 would silently ignore the end cell and not close the stream. If
30238 the client never closes the circuit, then the exit relay never
30239 closes the TCP connection. Bug introduced in 0.1.2.1-alpha;
30240 reported by "wood".
30241 - When we can't initialize DNS because the network is down, do not
30242 automatically stop Tor from starting. Instead, retry failed
30243 dns_init() every 10 minutes, and change the exit policy to reject
30244 *:* until one succeeds. Fixes bug 691.
30247 - Give a better error message when an overzealous init script says
30248 "sudo -u username tor --user username". Makes Bug 882 easier for
30250 - When a directory authority gives us a new guess for our IP address,
30251 log which authority we used. Hopefully this will help us debug
30252 the recent complaints about bad IP address guesses.
30253 - Detect svn revision properly when we're using git-svn.
30254 - Try not to open more than one descriptor-downloading connection
30255 to an authority at once. This should reduce load on directory
30256 authorities. Fixes bug 366.
30257 - Add cross-certification to newly generated certificates, so that
30258 a signing key is enough information to look up a certificate.
30259 Partial implementation of proposal 157.
30260 - Start serving certificates by <identity digest, signing key digest>
30261 pairs. Partial implementation of proposal 157.
30262 - Clients now never report any stream end reason except 'MISC'.
30263 Implements proposal 148.
30264 - On platforms with a maximum syslog string length, truncate syslog
30265 messages to that length ourselves, rather than relying on the
30266 system to do it for us.
30267 - Optimize out calls to time(NULL) that occur for every IO operation,
30268 or for every cell. On systems where time() is a slow syscall,
30269 this fix will be slightly helpful.
30270 - Exit servers can now answer resolve requests for ip6.arpa addresses.
30271 - When we download a descriptor that we then immediately (as
30272 a directory authority) reject, do not retry downloading it right
30273 away. Should save some bandwidth on authorities. Fix for bug
30274 888. Patch by Sebastian Hahn.
30275 - When a download gets us zero good descriptors, do not notify
30276 Tor that new directory information has arrived.
30277 - Avoid some nasty corner cases in the logic for marking connections
30278 as too old or obsolete or noncanonical for circuits. Partial
30281 o Minor features (controller):
30282 - New CONSENSUS_ARRIVED event to note when a new consensus has
30283 been fetched and validated.
30284 - When we realize that another process has modified our cached
30285 descriptors file, print out a more useful error message rather
30286 than triggering an assertion. Fixes bug 885. Patch from Karsten.
30287 - Add an internal-use-only __ReloadTorrcOnSIGHUP option for
30288 controllers to prevent SIGHUP from reloading the
30289 configuration. Fixes bug 856.
30292 - Resume using the correct "REASON=" stream when telling the
30293 controller why we closed a stream. Bugfix in 0.2.1.1-alpha.
30294 - When a canonical connection appears later in our internal list
30295 than a noncanonical one for a given OR ID, always use the
30296 canonical one. Bugfix on 0.2.0.12-alpha. Fixes bug 805.
30298 - Clip the MaxCircuitDirtiness config option to a minimum of 10
30299 seconds. Warn the user if lower values are given in the
30300 configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
30301 - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
30302 user if lower values are given in the configuration. Bugfix on
30303 0.1.1.17-rc. Patch by Sebastian.
30304 - Fix a race condition when freeing keys shared between main thread
30305 and CPU workers that could result in a memory leak. Bugfix on
30306 0.1.0.1-rc. Fixes bug 889.
30308 o Minor bugfixes (hidden services):
30309 - Do not throw away existing introduction points on SIGHUP (bugfix on
30310 0.0.6pre1); also, do not stall hidden services because we're
30311 throwing away introduction points; bugfix on 0.2.1.7-alpha. Spotted
30312 by John Brooks. Patch by Karsten. Fixes bug 874.
30313 - Fix a memory leak when we decline to add a v2 rendezvous
30314 descriptor to the cache because we already had a v0 descriptor
30315 with the same ID. Bugfix on 0.2.0.18-alpha.
30317 o Deprecated and removed features:
30318 - RedirectExits has been removed. It was deprecated since
30320 - Finally remove deprecated "EXTENDED_FORMAT" controller feature. It
30321 has been called EXTENDED_EVENTS since 0.1.2.4-alpha.
30322 - Cell pools are now always enabled; --disable-cell-pools is ignored.
30324 o Code simplifications and refactoring:
30325 - Rename the confusing or_is_obsolete field to the more appropriate
30326 is_bad_for_new_circs, and move it to or_connection_t where it
30328 - Move edge-only flags from connection_t to edge_connection_t: not
30329 only is this better coding, but on machines of plausible alignment,
30330 it should save 4-8 bytes per connection_t. "Every little bit helps."
30331 - Rename ServerDNSAllowBrokenResolvConf to ServerDNSAllowBrokenConfig
30332 for consistency; keep old option working for backward compatibility.
30333 - Simplify the code for finding connections to use for a circuit.
30336 Changes in version 0.2.1.8-alpha - 2008-12-08
30337 Tor 0.2.1.8-alpha fixes some crash bugs in earlier alpha releases,
30338 builds better on unusual platforms like Solaris and old OS X, and
30339 fixes a variety of other issues.
30342 - New DirPortFrontPage option that takes an html file and publishes
30343 it as "/" on the DirPort. Now relay operators can provide a
30344 disclaimer without needing to set up a separate webserver. There's
30345 a sample disclaimer in contrib/tor-exit-notice.html.
30348 - When the client is choosing entry guards, now it selects at most
30349 one guard from a given relay family. Otherwise we could end up with
30350 all of our entry points into the network run by the same operator.
30351 Suggested by Camilo Viecco. Fix on 0.1.1.11-alpha.
30354 - Fix a DOS opportunity during the voting signature collection process
30355 at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
30356 - Fix a possible segfault when establishing an exit connection. Bugfix
30360 - Get file locking working on win32. Bugfix on 0.2.1.6-alpha. Fixes
30362 - Made Tor a little less aggressive about deleting expired
30363 certificates. Partial fix for bug 854.
30364 - Stop doing unaligned memory access that generated bus errors on
30365 sparc64. Bugfix on 0.2.0.10-alpha. Fix for bug 862.
30366 - Fix a crash bug when changing EntryNodes from the controller. Bugfix
30367 on 0.2.1.6-alpha. Fix for bug 867. Patched by Sebastian.
30368 - Make USR2 log-level switch take effect immediately. Bugfix on
30370 - If one win32 nameserver fails to get added, continue adding the
30371 rest, and don't automatically fail.
30372 - Use fcntl() for locking when flock() is not available. Should fix
30373 compilation on Solaris. Should fix Bug 873. Bugfix on 0.2.1.6-alpha.
30374 - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
30375 could make gcc generate non-functional binary search code. Bugfix
30377 - Build correctly on platforms without socklen_t.
30378 - Avoid potential crash on internal error during signature collection.
30379 Fixes bug 864. Patch from rovv.
30380 - Do not use C's stdio library for writing to log files. This will
30381 improve logging performance by a minute amount, and will stop
30382 leaking fds when our disk is full. Fixes bug 861.
30383 - Stop erroneous use of O_APPEND in cases where we did not in fact
30384 want to re-seek to the end of a file before every last write().
30385 - Correct handling of possible malformed authority signing key
30386 certificates with internal signature types. Fixes bug 880. Bugfix
30388 - Fix a hard-to-trigger resource leak when logging credential status.
30392 - Directory mirrors no longer fetch the v1 directory or
30393 running-routers files. They are obsolete, and nobody asks for them
30394 anymore. This is the first step to making v1 authorities obsolete.
30396 o Minor features (controller):
30397 - Return circuit purposes in response to GETINFO circuit-status. Fixes
30401 Changes in version 0.2.0.32 - 2008-11-20
30402 Tor 0.2.0.32 fixes a major security problem in Debian and Ubuntu
30403 packages (and maybe other packages) noticed by Theo de Raadt, fixes
30404 a smaller security flaw that might allow an attacker to access local
30405 services, further improves hidden service performance, and fixes a
30406 variety of other issues.
30409 - The "User" and "Group" config options did not clear the
30410 supplementary group entries for the Tor process. The "User" option
30411 is now more robust, and we now set the groups to the specified
30412 user's primary group. The "Group" option is now ignored. For more
30413 detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
30414 in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
30415 and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848 and 857.
30416 - The "ClientDNSRejectInternalAddresses" config option wasn't being
30417 consistently obeyed: if an exit relay refuses a stream because its
30418 exit policy doesn't allow it, we would remember what IP address
30419 the relay said the destination address resolves to, even if it's
30420 an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
30423 - Fix a DOS opportunity during the voting signature collection process
30424 at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
30426 o Major bugfixes (hidden services):
30427 - When fetching v0 and v2 rendezvous service descriptors in parallel,
30428 we were failing the whole hidden service request when the v0
30429 descriptor fetch fails, even if the v2 fetch is still pending and
30430 might succeed. Similarly, if the last v2 fetch fails, we were
30431 failing the whole hidden service request even if a v0 fetch is
30432 still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
30433 - When extending a circuit to a hidden service directory to upload a
30434 rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
30435 requests failed, because the router descriptor has not been
30436 downloaded yet. In these cases, do not attempt to upload the
30437 rendezvous descriptor, but wait until the router descriptor is
30438 downloaded and retry. Likewise, do not attempt to fetch a rendezvous
30439 descriptor from a hidden service directory for which the router
30440 descriptor has not yet been downloaded. Fixes bug 767. Bugfix
30444 - Fix several infrequent memory leaks spotted by Coverity.
30445 - When testing for libevent functions, set the LDFLAGS variable
30446 correctly. Found by Riastradh.
30447 - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
30448 bootstrapping with tunneled directory connections. Bugfix on
30449 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
30450 - When asked to connect to A.B.exit:80, if we don't know the IP for A
30451 and we know that server B rejects most-but-not all connections to
30452 port 80, we would previously reject the connection. Now, we assume
30453 the user knows what they were asking for. Fixes bug 752. Bugfix
30454 on 0.0.9rc5. Diagnosed by BarkerJr.
30455 - If we overrun our per-second write limits a little, count this as
30456 having used up our write allocation for the second, and choke
30457 outgoing directory writes. Previously, we had only counted this when
30458 we had met our limits precisely. Fixes bug 824. Patch from by rovv.
30459 Bugfix on 0.2.0.x (??).
30460 - Remove the old v2 directory authority 'lefkada' from the default
30461 list. It has been gone for many months.
30462 - Stop doing unaligned memory access that generated bus errors on
30463 sparc64. Bugfix on 0.2.0.10-alpha. Fixes bug 862.
30464 - Make USR2 log-level switch take effect immediately. Bugfix on
30467 o Minor bugfixes (controller):
30468 - Make DNS resolved events into "CLOSED", not "FAILED". Bugfix on
30469 0.1.2.5-alpha. Fix by Robert Hogan. Resolves bug 807.
30472 Changes in version 0.2.1.7-alpha - 2008-11-08
30473 Tor 0.2.1.7-alpha fixes a major security problem in Debian and Ubuntu
30474 packages (and maybe other packages) noticed by Theo de Raadt, fixes
30475 a smaller security flaw that might allow an attacker to access local
30476 services, adds better defense against DNS poisoning attacks on exit
30477 relays, further improves hidden service performance, and fixes a
30478 variety of other issues.
30481 - The "ClientDNSRejectInternalAddresses" config option wasn't being
30482 consistently obeyed: if an exit relay refuses a stream because its
30483 exit policy doesn't allow it, we would remember what IP address
30484 the relay said the destination address resolves to, even if it's
30485 an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
30486 - The "User" and "Group" config options did not clear the
30487 supplementary group entries for the Tor process. The "User" option
30488 is now more robust, and we now set the groups to the specified
30489 user's primary group. The "Group" option is now ignored. For more
30490 detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
30491 in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
30492 and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848.
30493 - Do not use or believe expired v3 authority certificates. Patch
30494 from Karsten. Bugfix in 0.2.0.x. Fixes bug 851.
30497 - Now NodeFamily and MyFamily config options allow spaces in
30498 identity fingerprints, so it's easier to paste them in.
30499 Suggested by Lucky Green.
30500 - Implement the 0x20 hack to better resist DNS poisoning: set the
30501 case on outgoing DNS requests randomly, and reject responses that do
30502 not match the case correctly. This logic can be disabled with the
30503 ServerDNSRandomizeCase setting, if you are using one of the 0.3%
30504 of servers that do not reliably preserve case in replies. See
30505 "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
30507 - Preserve case in replies to DNSPort requests in order to support
30508 the 0x20 hack for resisting DNS poisoning attacks.
30510 o Hidden service performance improvements:
30511 - When the client launches an introduction circuit, retry with a
30512 new circuit after 30 seconds rather than 60 seconds.
30513 - Launch a second client-side introduction circuit in parallel
30514 after a delay of 15 seconds (based on work by Christian Wilms).
30515 - Hidden services start out building five intro circuits rather
30516 than three, and when the first three finish they publish a service
30517 descriptor using those. Now we publish our service descriptor much
30518 faster after restart.
30521 - Minor fix in the warning messages when you're having problems
30522 bootstrapping; also, be more forgiving of bootstrap problems when
30523 we're still making incremental progress on a given bootstrap phase.
30524 - When we're choosing an exit node for a circuit, and we have
30525 no pending streams, choose a good general exit rather than one that
30526 supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
30527 - Send a valid END cell back when a client tries to connect to a
30528 nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
30529 840. Patch from rovv.
30530 - If a broken client asks a non-exit router to connect somewhere,
30531 do not even do the DNS lookup before rejecting the connection.
30532 Fixes another case of bug 619. Patch from rovv.
30533 - Fix another case of assuming, when a specific exit is requested,
30534 that we know more than the user about what hosts it allows.
30535 Fixes another case of bug 752. Patch from rovv.
30536 - Check which hops rendezvous stream cells are associated with to
30537 prevent possible guess-the-streamid injection attacks from
30538 intermediate hops. Fixes another case of bug 446. Based on patch
30540 - Avoid using a negative right-shift when comparing 32-bit
30541 addresses. Possible fix for bug 845 and bug 811.
30542 - Make the assert_circuit_ok() function work correctly on circuits that
30543 have already been marked for close.
30544 - Fix read-off-the-end-of-string error in unit tests when decoding
30545 introduction points.
30546 - Fix uninitialized size field for memory area allocation: may improve
30547 memory performance during directory parsing.
30548 - Treat duplicate certificate fetches as failures, so that we do
30549 not try to re-fetch an expired certificate over and over and over.
30550 - Do not say we're fetching a certificate when we'll in fact skip it
30551 because of a pending download.
30554 Changes in version 0.2.1.6-alpha - 2008-09-30
30555 Tor 0.2.1.6-alpha further improves performance and robustness of
30556 hidden services, starts work on supporting per-country relay selection,
30557 and fixes a variety of smaller issues.
30560 - Implement proposal 121: make it possible to build hidden services
30561 that only certain clients are allowed to connect to. This is
30562 enforced at several points, so that unauthorized clients are unable
30563 to send INTRODUCE cells to the service, or even (depending on the
30564 type of authentication) to learn introduction points. This feature
30565 raises the bar for certain kinds of active attacks against hidden
30566 services. Code by Karsten Loesing.
30567 - Relays now store and serve v2 hidden service descriptors by default,
30568 i.e., the new default value for HidServDirectoryV2 is 1. This is
30569 the last step in proposal 114, which aims to make hidden service
30570 lookups more reliable.
30571 - Start work to allow node restrictions to include country codes. The
30572 syntax to exclude nodes in a country with country code XX is
30573 "ExcludeNodes {XX}". Patch from Robert Hogan. It still needs some
30574 refinement to decide what config options should take priority if
30575 you ask to both use a particular node and exclude it.
30576 - Allow ExitNodes list to include IP ranges and country codes, just
30577 like the Exclude*Nodes lists. Patch from Robert Hogan.
30580 - Fix a bug when parsing ports in tor_addr_port_parse() that caused
30581 Tor to fail to start if you had it configured to use a bridge
30582 relay. Fixes bug 809. Bugfix on 0.2.1.5-alpha.
30583 - When extending a circuit to a hidden service directory to upload a
30584 rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
30585 requests failed, because the router descriptor had not been
30586 downloaded yet. In these cases, we now wait until the router
30587 descriptor is downloaded, and then retry. Likewise, clients
30588 now skip over a hidden service directory if they don't yet have
30589 its router descriptor, rather than futilely requesting it and
30590 putting mysterious complaints in the logs. Fixes bug 767. Bugfix
30592 - When fetching v0 and v2 rendezvous service descriptors in parallel,
30593 we were failing the whole hidden service request when the v0
30594 descriptor fetch fails, even if the v2 fetch is still pending and
30595 might succeed. Similarly, if the last v2 fetch fails, we were
30596 failing the whole hidden service request even if a v0 fetch is
30597 still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
30598 - DNS replies need to have names matching their requests, but
30599 these names should be in the questions section, not necessarily
30600 in the answers section. Fixes bug 823. Bugfix on 0.2.1.5-alpha.
30603 - Update to the "September 1 2008" ip-to-country file.
30604 - Allow ports 465 and 587 in the default exit policy again. We had
30605 rejected them in 0.1.0.15, because back in 2005 they were commonly
30606 misconfigured and ended up as spam targets. We hear they are better
30607 locked down these days.
30608 - Use a lockfile to make sure that two Tor processes are not
30609 simultaneously running with the same datadir.
30610 - Serve the latest v3 networkstatus consensus via the control
30611 port. Use "getinfo dir/status-vote/current/consensus" to fetch it.
30612 - Better logging about stability/reliability calculations on directory
30614 - Drop the requirement to have an open dir port for storing and
30615 serving v2 hidden service descriptors.
30616 - Directory authorities now serve a /tor/dbg-stability.txt URL to
30617 help debug WFU and MTBF calculations.
30618 - Implement most of Proposal 152: allow specialized servers to permit
30619 single-hop circuits, and clients to use those servers to build
30620 single-hop circuits when using a specialized controller. Patch
30621 from Josh Albrecht. Resolves feature request 768.
30622 - Add a -p option to tor-resolve for specifying the SOCKS port: some
30623 people find host:port too confusing.
30624 - Make TrackHostExit mappings expire a while after their last use, not
30625 after their creation. Patch from Robert Hogan.
30626 - Provide circuit purposes along with circuit events to the controller.
30629 - Fix compile on OpenBSD 4.4-current. Bugfix on 0.2.1.5-alpha.
30631 - Fixed some memory leaks -- some quite frequent, some almost
30632 impossible to trigger -- based on results from Coverity.
30633 - When testing for libevent functions, set the LDFLAGS variable
30634 correctly. Found by Riastradh.
30635 - Fix an assertion bug in parsing policy-related options; possible fix
30637 - Catch and report a few more bootstrapping failure cases when Tor
30638 fails to establish a TCP connection. Cleanup on 0.2.1.x.
30639 - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
30640 bootstrapping with tunneled directory connections. Bugfix on
30641 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
30642 - When asked to connect to A.B.exit:80, if we don't know the IP for A
30643 and we know that server B rejects most-but-not all connections to
30644 port 80, we would previously reject the connection. Now, we assume
30645 the user knows what they were asking for. Fixes bug 752. Bugfix
30646 on 0.0.9rc5. Diagnosed by BarkerJr.
30647 - If we are not using BEGIN_DIR cells, don't attempt to contact hidden
30648 service directories if they have no advertised dir port. Bugfix
30650 - If we overrun our per-second write limits a little, count this as
30651 having used up our write allocation for the second, and choke
30652 outgoing directory writes. Previously, we had only counted this when
30653 we had met our limits precisely. Fixes bug 824. Patch by rovv.
30654 Bugfix on 0.2.0.x (??).
30655 - Avoid a "0 divided by 0" calculation when calculating router uptime
30656 at directory authorities. Bugfix on 0.2.0.8-alpha.
30657 - Make DNS resolved controller events into "CLOSED", not
30658 "FAILED". Bugfix on 0.1.2.5-alpha. Fix by Robert Hogan. Resolves
30660 - Fix a bug where an unreachable relay would establish enough
30661 reachability testing circuits to do a bandwidth test -- if
30662 we already have a connection to the middle hop of the testing
30663 circuit, then it could establish the last hop by using the existing
30664 connection. Bugfix on 0.1.2.2-alpha, exposed when we made testing
30665 circuits no longer use entry guards in 0.2.1.3-alpha.
30666 - If we have correct permissions on $datadir, we complain to stdout
30667 and fail to start. But dangerous permissions on
30668 $datadir/cached-status/ would cause us to open a log and complain
30669 there. Now complain to stdout and fail to start in both cases. Fixes
30670 bug 820, reported by seeess.
30671 - Remove the old v2 directory authority 'lefkada' from the default
30672 list. It has been gone for many months.
30674 o Code simplifications and refactoring:
30675 - Revise the connection_new functions so that a more typesafe variant
30676 exists. This will work better with Coverity, and let us find any
30677 actual mistakes we're making here.
30678 - Refactor unit testing logic so that dmalloc can be used sensibly
30679 with unit tests to check for memory leaks.
30680 - Move all hidden-service related fields from connection and circuit
30681 structure to substructures: this way they won't eat so much memory.
30684 Changes in version 0.2.0.31 - 2008-09-03
30685 Tor 0.2.0.31 addresses two potential anonymity issues, starts to fix
30686 a big bug we're seeing where in rare cases traffic from one Tor stream
30687 gets mixed into another stream, and fixes a variety of smaller issues.
30690 - Make sure that two circuits can never exist on the same connection
30691 with the same circuit ID, even if one is marked for close. This
30692 is conceivably a bugfix for bug 779. Bugfix on 0.1.0.4-rc.
30693 - Relays now reject risky extend cells: if the extend cell includes
30694 a digest of all zeroes, or asks to extend back to the relay that
30695 sent the extend cell, tear down the circuit. Ideas suggested
30697 - If not enough of our entry guards are available so we add a new
30698 one, we might use the new one even if it overlapped with the
30699 current circuit's exit relay (or its family). Anonymity bugfix
30700 pointed out by rovv.
30703 - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
30704 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
30705 - Correctly detect the presence of the linux/netfilter_ipv4.h header
30706 when building against recent kernels. Bugfix on 0.1.2.1-alpha.
30707 - Pick size of default geoip filename string correctly on windows.
30708 Fixes bug 806. Bugfix on 0.2.0.30.
30709 - Make the autoconf script accept the obsolete --with-ssl-dir
30710 option as an alias for the actually-working --with-openssl-dir
30711 option. Fix the help documentation to recommend --with-openssl-dir.
30712 Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
30713 - When using the TransPort option on OpenBSD, and using the User
30714 option to change UID and drop privileges, make sure to open
30715 /dev/pf before dropping privileges. Fixes bug 782. Patch from
30716 Christopher Davis. Bugfix on 0.1.2.1-alpha.
30717 - Try to attach connections immediately upon receiving a RENDEZVOUS2
30718 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
30719 on the client side when connecting to a hidden service. Bugfix
30720 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
30721 - When closing an application-side connection because its circuit is
30722 getting torn down, generate the stream event correctly. Bugfix on
30723 0.1.2.x. Anonymous patch.
30726 Changes in version 0.2.1.5-alpha - 2008-08-31
30727 Tor 0.2.1.5-alpha moves us closer to handling IPv6 destinations, puts
30728 in a lot of the infrastructure for adding authorization to hidden
30729 services, lays the groundwork for having clients read their load
30730 balancing information out of the networkstatus consensus rather than
30731 the individual router descriptors, addresses two potential anonymity
30732 issues, and fixes a variety of smaller issues.
30735 - Convert many internal address representations to optionally hold
30737 - Generate and accept IPv6 addresses in many protocol elements.
30738 - Make resolver code handle nameservers located at ipv6 addresses.
30739 - Begin implementation of proposal 121 ("Client authorization for
30740 hidden services"): configure hidden services with client
30741 authorization, publish descriptors for them, and configure
30742 authorization data for hidden services at clients. The next
30743 step is to actually access hidden services that perform client
30745 - More progress toward proposal 141: Network status consensus
30746 documents and votes now contain bandwidth information for each
30747 router and a summary of that router's exit policy. Eventually this
30748 will be used by clients so that they do not have to download every
30749 known descriptor before building circuits.
30751 o Major bugfixes (on 0.2.0.x and before):
30752 - When sending CREATED cells back for a given circuit, use a 64-bit
30753 connection ID to find the right connection, rather than an addr:port
30754 combination. Now that we can have multiple OR connections between
30755 the same ORs, it is no longer possible to use addr:port to uniquely
30756 identify a connection.
30757 - Relays now reject risky extend cells: if the extend cell includes
30758 a digest of all zeroes, or asks to extend back to the relay that
30759 sent the extend cell, tear down the circuit. Ideas suggested
30761 - If not enough of our entry guards are available so we add a new
30762 one, we might use the new one even if it overlapped with the
30763 current circuit's exit relay (or its family). Anonymity bugfix
30764 pointed out by rovv.
30767 - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
30768 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
30769 - When using the TransPort option on OpenBSD, and using the User
30770 option to change UID and drop privileges, make sure to open /dev/pf
30771 before dropping privileges. Fixes bug 782. Patch from Christopher
30772 Davis. Bugfix on 0.1.2.1-alpha.
30773 - Correctly detect the presence of the linux/netfilter_ipv4.h header
30774 when building against recent kernels. Bugfix on 0.1.2.1-alpha.
30775 - Add a missing safe_str() call for a debug log message.
30776 - Use 64 bits instead of 32 bits for connection identifiers used with
30777 the controller protocol, to greatly reduce risk of identifier reuse.
30778 - Make the autoconf script accept the obsolete --with-ssl-dir
30779 option as an alias for the actually-working --with-openssl-dir
30780 option. Fix the help documentation to recommend --with-openssl-dir.
30781 Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
30784 - Rate-limit too-many-sockets messages: when they happen, they happen
30785 a lot. Resolves bug 748.
30786 - Resist DNS poisoning a little better by making sure that names in
30787 answer sections match.
30788 - Print the SOCKS5 error message string as well as the error code
30789 when a tor-resolve request fails. Patch from Jacob.
30792 Changes in version 0.2.1.4-alpha - 2008-08-04
30793 Tor 0.2.1.4-alpha fixes a pair of crash bugs in 0.2.1.3-alpha.
30796 - The address part of exit policies was not correctly written
30797 to router descriptors. This generated router descriptors that failed
30798 their self-checks. Noticed by phobos, fixed by Karsten. Bugfix
30800 - Tor triggered a false assert when extending a circuit to a relay
30801 but we already have a connection open to that relay. Noticed by
30802 phobos, fixed by Karsten. Bugfix on 0.2.1.3-alpha.
30805 - Fix a hidden service logging bug: in some edge cases, the router
30806 descriptor of a previously picked introduction point becomes
30807 obsolete and we need to give up on it rather than continually
30808 complaining that it has become obsolete. Observed by xiando. Bugfix
30811 o Removed features:
30812 - Take out the TestVia config option, since it was a workaround for
30813 a bug that was fixed in Tor 0.1.1.21.
30816 Changes in version 0.2.1.3-alpha - 2008-08-03
30817 Tor 0.2.1.3-alpha implements most of the pieces to prevent
30818 infinite-length circuit attacks (see proposal 110); fixes a bug that
30819 might cause exit relays to corrupt streams they send back; allows
30820 address patterns (e.g. 255.128.0.0/16) to appear in ExcludeNodes and
30821 ExcludeExitNodes config options; and fixes a big pile of bugs.
30823 o Bootstrapping bugfixes (on 0.2.1.x-alpha):
30824 - Send a bootstrap problem "warn" event on the first problem if the
30825 reason is NO_ROUTE (that is, our network is down).
30828 - Implement most of proposal 110: The first K cells to be sent
30829 along a circuit are marked as special "early" cells; only K "early"
30830 cells will be allowed. Once this code is universal, we can block
30831 certain kinds of DOS attack by requiring that EXTEND commands must
30832 be sent using an "early" cell.
30835 - Try to attach connections immediately upon receiving a RENDEZVOUS2
30836 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
30837 on the client side when connecting to a hidden service. Bugfix
30838 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
30839 - Ensure that two circuits can never exist on the same connection
30840 with the same circuit ID, even if one is marked for close. This
30841 is conceivably a bugfix for bug 779; fixes a bug on 0.1.0.4-rc.
30844 - When relays do their initial bandwidth measurement, don't limit
30845 to just our entry guards for the test circuits. Otherwise we tend
30846 to have multiple test circuits going through a single entry guard,
30847 which makes our bandwidth test less accurate. Fixes part of bug 654;
30848 patch contributed by Josh Albrecht.
30849 - Add an ExcludeExitNodes option so users can list a set of nodes
30850 that should be be excluded from the exit node position, but
30851 allowed elsewhere. Implements proposal 151.
30852 - Allow address patterns (e.g., 255.128.0.0/16) to appear in
30853 ExcludeNodes and ExcludeExitNodes lists.
30854 - Change the implementation of ExcludeNodes and ExcludeExitNodes to
30855 be more efficient. Formerly it was quadratic in the number of
30856 servers; now it should be linear. Fixes bug 509.
30857 - Save 16-22 bytes per open circuit by moving the n_addr, n_port,
30858 and n_conn_id_digest fields into a separate structure that's
30859 only needed when the circuit has not yet attached to an n_conn.
30862 - Change the contrib/tor.logrotate script so it makes the new
30863 logs as "_tor:_tor" rather than the default, which is generally
30864 "root:wheel". Fixes bug 676, reported by Serge Koksharov.
30865 - Stop using __attribute__((nonnull)) with GCC: it can give us useful
30866 warnings (occasionally), but it can also cause the compiler to
30867 eliminate error-checking code. Suggested by Peter Gutmann.
30868 - When a hidden service is giving up on an introduction point candidate
30869 that was not included in the last published rendezvous descriptor,
30870 don't reschedule publication of the next descriptor. Fixes bug 763.
30872 - Mark RendNodes, RendExcludeNodes, HiddenServiceNodes, and
30873 HiddenServiceExcludeNodes as obsolete: they never worked properly,
30874 and nobody claims to be using them. Fixes bug 754. Bugfix on
30875 0.1.0.1-rc. Patch from Christian Wilms.
30876 - Fix a small alignment and memory-wasting bug on buffer chunks.
30879 o Minor bugfixes (controller):
30880 - When closing an application-side connection because its circuit
30881 is getting torn down, generate the stream event correctly.
30882 Bugfix on 0.1.2.x. Anonymous patch.
30884 o Removed features:
30885 - Remove all backward-compatibility code to support relays running
30886 versions of Tor so old that they no longer work at all on the
30890 Changes in version 0.2.0.30 - 2008-07-15
30892 - Stop using __attribute__((nonnull)) with GCC: it can give us useful
30893 warnings (occasionally), but it can also cause the compiler to
30894 eliminate error-checking code. Suggested by Peter Gutmann.
30897 Changes in version 0.2.0.29-rc - 2008-07-08
30898 Tor 0.2.0.29-rc fixes two big bugs with using bridges, fixes more
30899 hidden-service performance bugs, and fixes a bunch of smaller bugs.
30902 - If you have more than one bridge but don't know their keys,
30903 you would only launch a request for the descriptor of the first one
30904 on your list. (Tor considered launching requests for the others, but
30905 found that it already had a connection on the way for $0000...0000
30906 so it didn't open another.) Bugfix on 0.2.0.x.
30907 - If you have more than one bridge but don't know their keys, and the
30908 connection to one of the bridges failed, you would cancel all
30909 pending bridge connections. (After all, they all have the same
30910 digest.) Bugfix on 0.2.0.x.
30911 - When a hidden service was trying to establish an introduction point,
30912 and Tor had built circuits preemptively for such purposes, we
30913 were ignoring all the preemptive circuits and launching a new one
30914 instead. Bugfix on 0.2.0.14-alpha.
30915 - When a hidden service was trying to establish an introduction point,
30916 and Tor *did* manage to reuse one of the preemptively built
30917 circuits, it didn't correctly remember which one it used,
30918 so it asked for another one soon after, until there were no
30919 more preemptive circuits, at which point it launched one from
30920 scratch. Bugfix on 0.0.9.x.
30921 - Make directory servers include the X-Your-Address-Is: http header in
30922 their responses even for begin_dir conns. Now clients who only
30923 ever use begin_dir connections still have a way to learn their IP
30924 address. Fixes bug 737; bugfix on 0.2.0.22-rc. Reported by goldy.
30927 - Fix a macro/CPP interaction that was confusing some compilers:
30928 some GCCs don't like #if/#endif pairs inside macro arguments.
30930 - Fix macro collision between OpenSSL 0.9.8h and Windows headers.
30931 Fixes bug 704; fix from Steven Murdoch.
30932 - When opening /dev/null in finish_daemonize(), do not pass the
30933 O_CREAT flag. Fortify was complaining, and correctly so. Fixes
30934 bug 742; fix from Michael Scherer. Bugfix on 0.0.2pre19.
30935 - Correctly detect transparent proxy support on Linux hosts that
30936 require in.h to be included before netfilter_ipv4.h. Patch
30938 - Disallow session resumption attempts during the renegotiation
30939 stage of the v2 handshake protocol. Clients should never be trying
30940 session resumption at this point, but apparently some did, in
30941 ways that caused the handshake to fail. Bugfix on 0.2.0.20-rc. Bug
30942 found by Geoff Goodell.
30945 Changes in version 0.2.1.2-alpha - 2008-06-20
30946 Tor 0.2.1.2-alpha includes a new "TestingTorNetwork" config option to
30947 make it easier to set up your own private Tor network; fixes several
30948 big bugs with using more than one bridge relay; fixes a big bug with
30949 offering hidden services quickly after Tor starts; and uses a better
30950 API for reporting potential bootstrapping problems to the controller.
30953 - New TestingTorNetwork config option to allow adjustment of
30954 previously constant values that, while reasonable, could slow
30955 bootstrapping. Implements proposal 135. Patch from Karsten.
30958 - If you have more than one bridge but don't know their digests,
30959 you would only learn a request for the descriptor of the first one
30960 on your list. (Tor considered launching requests for the others, but
30961 found that it already had a connection on the way for $0000...0000
30962 so it didn't open another.) Bugfix on 0.2.0.x.
30963 - If you have more than one bridge but don't know their digests,
30964 and the connection to one of the bridges failed, you would cancel
30965 all pending bridge connections. (After all, they all have the
30966 same digest.) Bugfix on 0.2.0.x.
30967 - When establishing a hidden service, introduction points that
30968 originate from cannibalized circuits are completely ignored and not
30969 included in rendezvous service descriptors. This might be another
30970 reason for delay in making a hidden service available. Bugfix
30971 from long ago (0.0.9.x?)
30974 - Allow OpenSSL to use dynamic locks if it wants.
30975 - When building a consensus, do not include routers that are down.
30976 This will cut down 30% to 40% on consensus size. Implements
30978 - In directory authorities' approved-routers files, allow
30979 fingerprints with or without space.
30980 - Add a "GETINFO /status/bootstrap-phase" controller option, so the
30981 controller can query our current bootstrap state in case it attaches
30982 partway through and wants to catch up.
30983 - Send an initial "Starting" bootstrap status event, so we have a
30984 state to start out in.
30987 - Asking for a conditional consensus at .../consensus/<fingerprints>
30988 would crash a dirserver if it did not already have a
30989 consensus. Bugfix on 0.2.1.1-alpha.
30990 - Clean up some macro/CPP interactions: some GCC versions don't like
30991 #if/#endif pairs inside macro arguments. Fixes bug 707. Bugfix on
30994 o Bootstrapping bugfixes (on 0.2.1.1-alpha):
30995 - Directory authorities shouldn't complain about bootstrapping
30996 problems just because they do a lot of reachability testing and
30997 some of the connection attempts fail.
30998 - Start sending "count" and "recommendation" key/value pairs in
30999 bootstrap problem status events, so the controller can hear about
31000 problems even before Tor decides they're worth reporting for sure.
31001 - If you're using bridges, generate "bootstrap problem" warnings
31002 as soon as you run out of working bridges, rather than waiting
31003 for ten failures -- which will never happen if you have less than
31005 - If we close our OR connection because there's been a circuit
31006 pending on it for too long, we were telling our bootstrap status
31007 events "REASON=NONE". Now tell them "REASON=TIMEOUT".
31010 Changes in version 0.2.1.1-alpha - 2008-06-13
31011 Tor 0.2.1.1-alpha fixes a lot of memory fragmentation problems that
31012 were making the Tor process bloat especially on Linux; makes our TLS
31013 handshake blend in better; sends "bootstrap phase" status events to
31014 the controller, so it can keep the user informed of progress (and
31015 problems) fetching directory information and establishing circuits;
31016 and adds a variety of smaller features.
31019 - More work on making our TLS handshake blend in: modify the list
31020 of ciphers advertised by OpenSSL in client mode to even more
31021 closely resemble a common web browser. We cheat a little so that
31022 we can advertise ciphers that the locally installed OpenSSL doesn't
31024 - Start sending "bootstrap phase" status events to the controller,
31025 so it can keep the user informed of progress fetching directory
31026 information and establishing circuits. Also inform the controller
31027 if we think we're stuck at a particular bootstrap phase. Implements
31029 - Resume using OpenSSL's RAND_poll() for better (and more portable)
31030 cross-platform entropy collection again. We used to use it, then
31031 stopped using it because of a bug that could crash systems that
31032 called RAND_poll when they had a lot of fds open. It looks like the
31033 bug got fixed in late 2006. Our new behavior is to call RAND_poll()
31034 at startup, and to call RAND_poll() when we reseed later only if
31035 we have a non-buggy OpenSSL version.
31038 - When we choose to abandon a new entry guard because we think our
31039 older ones might be better, close any circuits pending on that
31040 new entry guard connection. This fix should make us recover much
31041 faster when our network is down and then comes back. Bugfix on
31042 0.1.2.8-beta; found by lodger.
31044 o Memory fixes and improvements:
31045 - Add a malloc_good_size implementation to OpenBSD_malloc_linux.c,
31046 to avoid unused RAM in buffer chunks and memory pools.
31047 - Speed up parsing and cut down on memory fragmentation by using
31048 stack-style allocations for parsing directory objects. Previously,
31049 this accounted for over 40% of allocations from within Tor's code
31050 on a typical directory cache.
31051 - Use a Bloom filter rather than a digest-based set to track which
31052 descriptors we need to keep around when we're cleaning out old
31053 router descriptors. This speeds up the computation significantly,
31054 and may reduce fragmentation.
31055 - Reduce the default smartlist size from 32 to 16; it turns out that
31056 most smartlists hold around 8-12 elements tops.
31057 - Make dumpstats() log the fullness and size of openssl-internal
31059 - If the user has applied the experimental SSL_MODE_RELEASE_BUFFERS
31060 patch to their OpenSSL, turn it on to save memory on servers. This
31061 patch will (with any luck) get included in a mainline distribution
31063 - Never use OpenSSL compression: it wastes RAM and CPU trying to
31064 compress cells, which are basically all encrypted, compressed,
31068 - Stop reloading the router list from disk for no reason when we
31069 run out of reachable directory mirrors. Once upon a time reloading
31070 it would set the 'is_running' flag back to 1 for them. It hasn't
31071 done that for a long time.
31072 - In very rare situations new hidden service descriptors were
31073 published earlier than 30 seconds after the last change to the
31074 service. (We currently think that a hidden service descriptor
31075 that's been stable for 30 seconds is worth publishing.)
31078 - Allow separate log levels to be configured for different logging
31079 domains. For example, this allows one to log all notices, warnings,
31080 or errors, plus all memory management messages of level debug or
31081 higher, with: Log [MM] debug-err [*] notice-err file /var/log/tor.
31082 - Add a couple of extra warnings to --enable-gcc-warnings for GCC 4.3,
31083 and stop using a warning that had become unfixably verbose under
31085 - New --hush command-line option similar to --quiet. While --quiet
31086 disables all logging to the console on startup, --hush limits the
31087 output to messages of warning and error severity.
31088 - Servers support a new URL scheme for consensus downloads that
31089 allows the client to specify which authorities are trusted.
31090 The server then only sends the consensus if the client will trust
31091 it. Otherwise a 404 error is sent back. Clients use this
31092 new scheme when the server supports it (meaning it's running
31093 0.2.1.1-alpha or later). Implements proposal 134.
31094 - New configure/torrc options (--enable-geoip-stats,
31095 DirRecordUsageByCountry) to record how many IPs we've served
31096 directory info to in each country code, how many status documents
31097 total we've sent to each country code, and what share of the total
31098 directory requests we should expect to see.
31099 - Use the TLS1 hostname extension to more closely resemble browser
31101 - Lots of new unit tests.
31102 - Add a macro to implement the common pattern of iterating through
31103 two parallel lists in lockstep.
31106 Changes in version 0.2.0.28-rc - 2008-06-13
31107 Tor 0.2.0.28-rc fixes an anonymity-related bug, fixes a hidden-service
31108 performance bug, and fixes a bunch of smaller bugs.
31111 - Fix a bug where, when we were choosing the 'end stream reason' to
31112 put in our relay end cell that we send to the exit relay, Tor
31113 clients on Windows were sometimes sending the wrong 'reason'. The
31114 anonymity problem is that exit relays may be able to guess whether
31115 the client is running Windows, thus helping partition the anonymity
31116 set. Down the road we should stop sending reasons to exit relays,
31117 or otherwise prevent future versions of this bug.
31120 - While setting up a hidden service, some valid introduction circuits
31121 were overlooked and abandoned. This might be the reason for
31122 the long delay in making a hidden service available. Bugfix on
31126 - Update to the "June 9 2008" ip-to-country file.
31127 - Run 'make test' as part of 'make dist', so we stop releasing so
31128 many development snapshots that fail their unit tests.
31131 - When we're checking if we have enough dir info for each relay
31132 to begin establishing circuits, make sure that we actually have
31133 the descriptor listed in the consensus, not just any descriptor.
31135 - Bridge relays no longer print "xx=0" in their extrainfo document
31136 for every single country code in the geoip db. Bugfix on
31138 - Only warn when we fail to load the geoip file if we were planning to
31139 include geoip stats in our extrainfo document. Bugfix on 0.2.0.27-rc.
31140 - If we change our MaxAdvertisedBandwidth and then reload torrc,
31141 Tor won't realize it should publish a new relay descriptor. Fixes
31142 bug 688, reported by mfr. Bugfix on 0.1.2.x.
31143 - When we haven't had any application requests lately, don't bother
31144 logging that we have expired a bunch of descriptors. Bugfix
31146 - Make relay cells written on a connection count as non-padding when
31147 tracking how long a connection has been in use. Bugfix on
31148 0.2.0.1-alpha. Spotted by lodger.
31149 - Fix unit tests in 0.2.0.27-rc.
31150 - Fix compile on Windows.
31153 Changes in version 0.2.0.27-rc - 2008-06-03
31154 Tor 0.2.0.27-rc adds a few features we left out of the earlier
31155 release candidates. In particular, we now include an IP-to-country
31156 GeoIP database, so controllers can easily look up what country a
31157 given relay is in, and so bridge relays can give us some sanitized
31158 summaries about which countries are making use of bridges. (See proposal
31159 126-geoip-fetching.txt for details.)
31162 - Include an IP-to-country GeoIP file in the tarball, so bridge
31163 relays can report sanitized summaries of the usage they're seeing.
31166 - Add a "PURPOSE=" argument to "STREAM NEW" events, as suggested by
31167 Robert Hogan. Fixes the first part of bug 681.
31168 - Make bridge authorities never serve extrainfo docs.
31169 - Add support to detect Libevent versions in the 1.4.x series
31171 - Fix build on gcc 4.3 with --enable-gcc-warnings set.
31172 - Include a new contrib/tor-exit-notice.html file that exit relay
31173 operators can put on their website to help reduce abuse queries.
31176 - When tunneling an encrypted directory connection, and its first
31177 circuit fails, do not leave it unattached and ask the controller
31178 to deal. Fixes the second part of bug 681.
31179 - Make bridge authorities correctly expire old extrainfo documents
31183 Changes in version 0.2.0.26-rc - 2008-05-13
31184 Tor 0.2.0.26-rc fixes a major security vulnerability caused by a bug
31185 in Debian's OpenSSL packages. All users running any 0.2.0.x version
31186 should upgrade, whether they're running Debian or not.
31188 o Major security fixes:
31189 - Use new V3 directory authority keys on the tor26, gabelmoo, and
31190 moria1 V3 directory authorities. The old keys were generated with
31191 a vulnerable version of Debian's OpenSSL package, and must be
31192 considered compromised. Other authorities' keys were not generated
31193 with an affected version of OpenSSL.
31196 - List authority signatures as "unrecognized" based on DirServer
31197 lines, not on cert cache. Bugfix on 0.2.0.x.
31200 - Add a new V3AuthUseLegacyKey option to make it easier for
31201 authorities to change their identity keys if they have to.
31204 Changes in version 0.2.0.25-rc - 2008-04-23
31205 Tor 0.2.0.25-rc makes Tor work again on OS X and certain BSDs.
31208 - Remember to initialize threading before initializing logging.
31209 Otherwise, many BSD-family implementations will crash hard on
31210 startup. Fixes bug 671. Bugfix on 0.2.0.24-rc.
31213 - Authorities correctly free policies on bad servers on
31214 exit. Fixes bug 672. Bugfix on 0.2.0.x.
31217 Changes in version 0.2.0.24-rc - 2008-04-22
31218 Tor 0.2.0.24-rc adds dizum (run by Alex de Joode) as the new sixth
31219 v3 directory authority, makes relays with dynamic IP addresses and no
31220 DirPort notice more quickly when their IP address changes, fixes a few
31221 rare crashes and memory leaks, and fixes a few other miscellaneous bugs.
31223 o New directory authorities:
31224 - Take lefkada out of the list of v3 directory authorities, since
31225 it has been down for months.
31226 - Set up dizum (run by Alex de Joode) as the new sixth v3 directory
31230 - Detect address changes more quickly on non-directory mirror
31231 relays. Bugfix on 0.2.0.18-alpha; fixes bug 652.
31233 o Minor features (security):
31234 - Reject requests for reverse-dns lookup of names that are in
31235 a private address space. Patch from lodger.
31236 - Non-exit relays no longer allow DNS requests. Fixes bug 619. Patch
31239 o Minor bugfixes (crashes):
31240 - Avoid a rare assert that can trigger when Tor doesn't have much
31241 directory information yet and it tries to fetch a v2 hidden
31242 service descriptor. Fixes bug 651, reported by nwf.
31243 - Initialize log mutex before initializing dmalloc. Otherwise,
31244 running with dmalloc would crash. Bugfix on 0.2.0.x-alpha.
31245 - Use recursive pthread mutexes in order to avoid deadlock when
31246 logging debug-level messages to a controller. Bug spotted by nwf,
31247 bugfix on 0.2.0.16-alpha.
31249 o Minor bugfixes (resource management):
31250 - Keep address policies from leaking memory: start their refcount
31251 at 1, not 2. Bugfix on 0.2.0.16-alpha.
31252 - Free authority certificates on exit, so they don't look like memory
31253 leaks. Bugfix on 0.2.0.19-alpha.
31254 - Free static hashtables for policy maps and for TLS connections on
31255 shutdown, so they don't look like memory leaks. Bugfix on 0.2.0.x.
31256 - Avoid allocating extra space when computing consensuses on 64-bit
31257 platforms. Bug spotted by aakova.
31259 o Minor bugfixes (misc):
31260 - Do not read the configuration file when we've only been told to
31261 generate a password hash. Fixes bug 643. Bugfix on 0.0.9pre5. Fix
31262 based on patch from Sebastian Hahn.
31263 - Exit relays that are used as a client can now reach themselves
31264 using the .exit notation, rather than just launching an infinite
31265 pile of circuits. Fixes bug 641. Reported by Sebastian Hahn.
31266 - When attempting to open a logfile fails, tell us why.
31267 - Fix a dumb bug that was preventing us from knowing that we should
31268 preemptively build circuits to handle expected directory requests.
31269 Fixes bug 660. Bugfix on 0.1.2.x.
31270 - Warn less verbosely about clock skew from netinfo cells from
31271 untrusted sources. Fixes bug 663.
31272 - Make controller stream events for DNS requests more consistent,
31273 by adding "new stream" events for DNS requests, and removing
31274 spurious "stream closed" events" for cached reverse resolves.
31275 Patch from mwenge. Fixes bug 646.
31276 - Correctly notify one-hop connections when a circuit build has
31277 failed. Possible fix for bug 669. Found by lodger.
31280 Changes in version 0.2.0.23-rc - 2008-03-24
31281 Tor 0.2.0.23-rc is the fourth release candidate for the 0.2.0 series. It
31282 makes bootstrapping faster if the first directory mirror you contact
31283 is down. The bundles also include the new Vidalia 0.1.2 release.
31286 - When a tunneled directory request is made to a directory server
31287 that's down, notice after 30 seconds rather than 120 seconds. Also,
31288 fail any begindir streams that are pending on it, so they can
31289 retry elsewhere. This was causing multi-minute delays on bootstrap.
31292 Changes in version 0.2.0.22-rc - 2008-03-18
31293 Tor 0.2.0.22-rc is the third release candidate for the 0.2.0 series. It
31294 enables encrypted directory connections by default for non-relays, fixes
31295 some broken TLS behavior we added in 0.2.0.20-rc, and resolves many
31296 other bugs. The bundles also include Vidalia 0.1.1 and Torbutton 1.1.17.
31299 - Enable encrypted directory connections by default for non-relays,
31300 so censor tools that block Tor directory connections based on their
31301 plaintext patterns will no longer work. This means Tor works in
31302 certain censored countries by default again.
31305 - Make sure servers always request certificates from clients during
31306 TLS renegotiation. Reported by lodger; bugfix on 0.2.0.20-rc.
31307 - Do not enter a CPU-eating loop when a connection is closed in
31308 the middle of client-side TLS renegotiation. Fixes bug 622. Bug
31309 diagnosed by lodger; bugfix on 0.2.0.20-rc.
31310 - Fix assertion failure that could occur when a blocked circuit
31311 became unblocked, and it had pending client DNS requests. Bugfix
31312 on 0.2.0.1-alpha. Fixes bug 632.
31314 o Minor bugfixes (on 0.1.2.x):
31315 - Generate "STATUS_SERVER" events rather than misspelled
31316 "STATUS_SEVER" events. Caught by mwenge.
31317 - When counting the number of bytes written on a TLS connection,
31318 look at the BIO actually used for writing to the network, not
31319 at the BIO used (sometimes) to buffer data for the network.
31320 Looking at different BIOs could result in write counts on the
31321 order of ULONG_MAX. Fixes bug 614.
31322 - On Windows, correctly detect errors when listing the contents of
31323 a directory. Fix from lodger.
31325 o Minor bugfixes (on 0.2.0.x):
31326 - Downgrade "sslv3 alert handshake failure" message to INFO.
31327 - If we set RelayBandwidthRate and RelayBandwidthBurst very high but
31328 left BandwidthRate and BandwidthBurst at the default, we would be
31329 silently limited by those defaults. Now raise them to match the
31330 RelayBandwidth* values.
31331 - Fix the SVK version detection logic to work correctly on a branch.
31332 - Make --enable-openbsd-malloc work correctly on Linux with alpha
31333 CPUs. Fixes bug 625.
31334 - Logging functions now check that the passed severity is sane.
31335 - Use proper log levels in the testsuite call of
31336 get_interface_address6().
31337 - When using a nonstandard malloc, do not use the platform values for
31338 HAVE_MALLOC_GOOD_SIZE or HAVE_MALLOC_USABLE_SIZE.
31339 - Make the openbsd malloc code use 8k pages on alpha CPUs and
31341 - Detect mismatched page sizes when using --enable-openbsd-malloc.
31342 - Avoid double-marked-for-close warning when certain kinds of invalid
31343 .in-addr.arpa addresses are passed to the DNSPort. Part of a fix
31344 for bug 617. Bugfix on 0.2.0.1-alpha.
31345 - Make sure that the "NULL-means-reject *:*" convention is followed by
31346 all the policy manipulation functions, avoiding some possible crash
31347 bugs. Bug found by lodger. Bugfix on 0.2.0.16-alpha.
31348 - Fix the implementation of ClientDNSRejectInternalAddresses so that it
31349 actually works, and doesn't warn about every single reverse lookup.
31350 Fixes the other part of bug 617. Bugfix on 0.2.0.1-alpha.
31353 - Only log guard node status when guard node status has changed.
31354 - Downgrade the 3 most common "INFO" messages to "DEBUG". This will
31355 make "INFO" 75% less verbose.
31358 Changes in version 0.2.0.21-rc - 2008-03-02
31359 Tor 0.2.0.21-rc is the second release candidate for the 0.2.0 series. It
31360 makes Tor work well with Vidalia again, fixes a rare assert bug,
31361 and fixes a pair of more minor bugs. The bundles also include Vidalia
31362 0.1.0 and Torbutton 1.1.16.
31365 - The control port should declare that it requires password auth
31366 when HashedControlSessionPassword is set too. Patch from Matt Edman;
31367 bugfix on 0.2.0.20-rc. Fixes bug 615.
31368 - Downgrade assert in connection_buckets_decrement() to a log message.
31369 This may help us solve bug 614, and in any case will make its
31370 symptoms less severe. Bugfix on 0.2.0.20-rc. Reported by fredzupy.
31371 - We were sometimes miscounting the number of bytes read from the
31372 network, causing our rate limiting to not be followed exactly.
31373 Bugfix on 0.2.0.16-alpha. Reported by lodger.
31376 - Fix compilation with OpenSSL 0.9.8 and 0.9.8a. All other supported
31377 OpenSSL versions should have been working fine. Diagnosis and patch
31378 from lodger, Karsten Loesing, and Sebastian Hahn. Fixes bug 616.
31379 Bugfix on 0.2.0.20-rc.
31382 Changes in version 0.2.0.20-rc - 2008-02-24
31383 Tor 0.2.0.20-rc is the first release candidate for the 0.2.0 series. It
31384 makes more progress towards normalizing Tor's TLS handshake, makes
31385 hidden services work better again, helps relays bootstrap if they don't
31386 know their IP address, adds optional support for linking in openbsd's
31387 allocator or tcmalloc, allows really fast relays to scale past 15000
31388 sockets, and fixes a bunch of minor bugs reported by Veracode.
31391 - Enable the revised TLS handshake based on the one designed by
31392 Steven Murdoch in proposal 124, as revised in proposal 130. It
31393 includes version negotiation for OR connections as described in
31394 proposal 105. The new handshake is meant to be harder for censors
31395 to fingerprint, and it adds the ability to detect certain kinds of
31396 man-in-the-middle traffic analysis attacks. The version negotiation
31397 feature will allow us to improve Tor's link protocol more safely
31399 - Choose which bridge to use proportional to its advertised bandwidth,
31400 rather than uniformly at random. This should speed up Tor for
31401 bridge users. Also do this for people who set StrictEntryNodes.
31402 - When a TrackHostExits-chosen exit fails too many times in a row,
31403 stop using it. Bugfix on 0.1.2.x; fixes bug 437.
31406 - Resolved problems with (re-)fetching hidden service descriptors.
31407 Patch from Karsten Loesing; fixes problems with 0.2.0.18-alpha
31408 and 0.2.0.19-alpha.
31409 - If we only ever used Tor for hidden service lookups or posts, we
31410 would stop building circuits and start refusing connections after
31411 24 hours, since we falsely believed that Tor was dormant. Reported
31412 by nwf; bugfix on 0.1.2.x.
31413 - Servers that don't know their own IP address should go to the
31414 authorities for their first directory fetch, even if their DirPort
31415 is off or if they don't know they're reachable yet. This will help
31416 them bootstrap better. Bugfix on 0.2.0.18-alpha; fixes bug 609.
31417 - When counting the number of open sockets, count not only the number
31418 of sockets we have received from the socket() call, but also
31419 the number we've gotten from accept() and socketpair(). This bug
31420 made us fail to count all sockets that we were using for incoming
31421 connections. Bugfix on 0.2.0.x.
31422 - Fix code used to find strings within buffers, when those strings
31423 are not in the first chunk of the buffer. Bugfix on 0.2.0.x.
31424 - Fix potential segfault when parsing HTTP headers. Bugfix on 0.2.0.x.
31425 - Add a new __HashedControlSessionPassword option for controllers
31426 to use for one-off session password hashes that shouldn't get
31427 saved to disk by SAVECONF --- Vidalia users were accumulating a
31428 pile of HashedControlPassword lines in their torrc files, one for
31429 each time they had restarted Tor and then clicked Save. Make Tor
31430 automatically convert "HashedControlPassword" to this new option but
31431 only when it's given on the command line. Partial fix for bug 586.
31433 o Minor features (performance):
31434 - Tune parameters for cell pool allocation to minimize amount of
31436 - Add OpenBSD malloc code from phk as an optional malloc
31437 replacement on Linux: some glibc libraries do very poorly
31438 with Tor's memory allocation patterns. Pass
31439 --enable-openbsd-malloc to get the replacement malloc code.
31440 - Add a --with-tcmalloc option to the configure script to link
31441 against tcmalloc (if present). Does not yet search for
31442 non-system include paths.
31443 - Stop imposing an arbitrary maximum on the number of file descriptors
31444 used for busy servers. Bug reported by Olaf Selke; patch from
31447 o Minor features (other):
31448 - When SafeLogging is disabled, log addresses along with all TLS
31450 - When building with --enable-gcc-warnings, check for whether Apple's
31451 warning "-Wshorten-64-to-32" is available.
31452 - Add a --passphrase-fd argument to the tor-gencert command for
31455 o Minor bugfixes (memory leaks and code problems):
31456 - We were leaking a file descriptor if Tor started with a zero-length
31457 cached-descriptors file. Patch by freddy77; bugfix on 0.1.2.
31458 - Detect size overflow in zlib code. Reported by Justin Ferguson and
31460 - We were comparing the raw BridgePassword entry with a base64'ed
31461 version of it, when handling a "/tor/networkstatus-bridges"
31462 directory request. Now compare correctly. Noticed by Veracode.
31463 - Recover from bad tracked-since value in MTBF-history file.
31464 Should fix bug 537.
31465 - Alter the code that tries to recover from unhandled write
31466 errors, to not try to flush onto a socket that's given us
31467 unhandled errors. Bugfix on 0.1.2.x.
31468 - Make Unix controlsockets work correctly on OpenBSD. Patch from
31469 tup. Bugfix on 0.2.0.3-alpha.
31471 o Minor bugfixes (other):
31472 - If we have an extra-info document for our server, always make
31473 it available on the control port, even if we haven't gotten
31474 a copy of it from an authority yet. Patch from mwenge.
31475 - Log the correct memory chunk sizes for empty RAM chunks in mempool.c.
31476 - Directory mirrors no longer include a guess at the client's IP
31477 address if the connection appears to be coming from the same /24
31478 network; it was producing too many wrong guesses.
31479 - Make the new hidden service code respect the SafeLogging setting.
31480 Bugfix on 0.2.0.x. Patch from Karsten.
31481 - When starting as an authority, do not overwrite all certificates
31482 cached from other authorities. Bugfix on 0.2.0.x. Fixes bug 606.
31483 - If we're trying to flush the last bytes on a connection (for
31484 example, when answering a directory request), reset the
31485 time-to-give-up timeout every time we manage to write something
31486 on the socket. Bugfix on 0.1.2.x.
31487 - Change the behavior of "getinfo status/good-server-descriptor"
31488 so it doesn't return failure when any authority disappears.
31489 - Even though the man page said that "TrackHostExits ." should
31490 work, nobody had ever implemented it. Bugfix on 0.1.0.x.
31491 - Report TLS "zero return" case as a "clean close" and "IO error"
31492 as a "close". Stop calling closes "unexpected closes": existing
31493 Tors don't use SSL_close(), so having a connection close without
31494 the TLS shutdown handshake is hardly unexpected.
31495 - Send NAMESERVER_STATUS messages for a single failed nameserver
31498 o Code simplifications and refactoring:
31499 - Remove the tor_strpartition function: its logic was confused,
31500 and it was only used for one thing that could be implemented far
31504 Changes in version 0.2.0.19-alpha - 2008-02-09
31505 Tor 0.2.0.19-alpha makes more progress towards normalizing Tor's TLS
31506 handshake, makes path selection for relays more secure and IP address
31507 guessing more robust, and generally fixes a lot of bugs in preparation
31508 for calling the 0.2.0 branch stable.
31511 - Do not include recognizeable strings in the commonname part of
31512 Tor's x509 certificates.
31515 - If we're a relay, avoid picking ourselves as an introduction point,
31516 a rendezvous point, or as the final hop for internal circuits. Bug
31517 reported by taranis and lodger. Bugfix on 0.1.2.x.
31518 - Patch from "Andrew S. Lists" to catch when we contact a directory
31519 mirror at IP address X and he says we look like we're coming from
31520 IP address X. Bugfix on 0.1.2.x.
31522 o Minor features (security):
31523 - Be more paranoid about overwriting sensitive memory on free(),
31524 as a defensive programming tactic to ensure forward secrecy.
31526 o Minor features (directory authority):
31527 - Actually validate the options passed to AuthDirReject,
31528 AuthDirInvalid, AuthDirBadDir, and AuthDirBadExit.
31529 - Reject router descriptors with out-of-range bandwidthcapacity or
31530 bandwidthburst values.
31532 o Minor features (controller):
31533 - Reject controller commands over 1MB in length. This keeps rogue
31534 processes from running us out of memory.
31536 o Minor features (misc):
31537 - Give more descriptive well-formedness errors for out-of-range
31538 hidden service descriptor/protocol versions.
31539 - Make memory debugging information describe more about history
31540 of cell allocation, so we can help reduce our memory use.
31542 o Deprecated features (controller):
31543 - The status/version/num-versioning and status/version/num-concurring
31544 GETINFO options are no longer useful in the v3 directory protocol:
31545 treat them as deprecated, and warn when they're used.
31548 - When our consensus networkstatus has been expired for a while, stop
31549 being willing to build circuits using it. Fixes bug 401. Bugfix
31551 - Directory caches now fetch certificates from all authorities
31552 listed in a networkstatus consensus, even when they do not
31553 recognize them. Fixes bug 571. Bugfix on 0.2.0.x.
31554 - When connecting to a bridge without specifying its key, insert
31555 the connection into the identity-to-connection map as soon as
31556 a key is learned. Fixes bug 574. Bugfix on 0.2.0.x.
31557 - Detect versions of OS X where malloc_good_size() is present in the
31558 library but never actually declared. Resolves bug 587. Bugfix
31560 - Stop incorrectly truncating zlib responses to directory authority
31561 signature download requests. Fixes bug 593. Bugfix on 0.2.0.x.
31562 - Stop recommending that every server operator send mail to tor-ops.
31563 Resolves bug 597. Bugfix on 0.1.2.x.
31564 - Don't trigger an assert if we start a directory authority with a
31565 private IP address (like 127.0.0.1).
31566 - Avoid possible failures when generating a directory with routers
31567 with over-long versions strings, or too many flags set. Bugfix
31569 - If an attempt to launch a DNS resolve request over the control
31570 port fails because we have overrun the limit on the number of
31571 connections, tell the controller that the request has failed.
31572 - Avoid using too little bandwidth when our clock skips a few
31573 seconds. Bugfix on 0.1.2.x.
31574 - Fix shell error when warning about missing packages in configure
31575 script, on Fedora or Red Hat machines. Bugfix on 0.2.0.x.
31576 - Do not become confused when receiving a spurious VERSIONS-like
31577 cell from a confused v1 client. Bugfix on 0.2.0.x.
31578 - Re-fetch v2 (as well as v0) rendezvous descriptors when all
31579 introduction points for a hidden service have failed. Patch from
31580 Karsten Loesing. Bugfix on 0.2.0.x.
31582 o Code simplifications and refactoring:
31583 - Remove some needless generality from cpuworker code, for improved
31585 - Stop overloading the circuit_t.onionskin field for both "onionskin
31586 from a CREATE cell that we are waiting for a cpuworker to be
31587 assigned" and "onionskin from an EXTEND cell that we are going to
31588 send to an OR as soon as we are connected". Might help with bug 600.
31589 - Add an in-place version of aes_crypt() so that we can avoid doing a
31590 needless memcpy() call on each cell payload.
31593 Changes in version 0.2.0.18-alpha - 2008-01-25
31594 Tor 0.2.0.18-alpha adds a sixth v3 directory authority run by CCC,
31595 fixes a big memory leak in 0.2.0.17-alpha, and adds new config options
31596 that can warn or reject connections to ports generally associated with
31597 vulnerable-plaintext protocols.
31599 o New directory authorities:
31600 - Set up dannenberg (run by CCC) as the sixth v3 directory
31604 - Fix a major memory leak when attempting to use the v2 TLS
31605 handshake code. Bugfix on 0.2.0.x; fixes bug 589.
31606 - We accidentally enabled the under-development v2 TLS handshake
31607 code, which was causing log entries like "TLS error while
31608 renegotiating handshake". Disable it again. Resolves bug 590.
31609 - We were computing the wrong Content-Length: header for directory
31610 responses that need to be compressed on the fly, causing clients
31611 asking for those items to always fail. Bugfix on 0.2.0.x; partially
31615 - Avoid going directly to the directory authorities even if you're a
31616 relay, if you haven't found yourself reachable yet or if you've
31617 decided not to advertise your dirport yet. Addresses bug 556.
31618 - If we've gone 12 hours since our last bandwidth check, and we
31619 estimate we have less than 50KB bandwidth capacity but we could
31620 handle more, do another bandwidth test.
31621 - New config options WarnPlaintextPorts and RejectPlaintextPorts so
31622 Tor can warn and/or refuse connections to ports commonly used with
31623 vulnerable-plaintext protocols. Currently we warn on ports 23,
31624 109, 110, and 143, but we don't reject any.
31627 - When we setconf ClientOnly to 1, close any current OR and Dir
31628 listeners. Reported by mwenge.
31629 - When we get a consensus that's been signed by more people than
31630 we expect, don't log about it; it's not a big deal. Reported
31634 - Don't answer "/tor/networkstatus-bridges" directory requests if
31635 the request isn't encrypted.
31636 - Make "ClientOnly 1" config option disable directory ports too.
31637 - Patches from Karsten Loesing to make v2 hidden services more
31638 robust: work even when there aren't enough HSDir relays available;
31639 retry when a v2 rend desc fetch fails; but don't retry if we
31640 already have a usable v0 rend desc.
31643 Changes in version 0.2.0.17-alpha - 2008-01-17
31644 Tor 0.2.0.17-alpha makes the tarball build cleanly again (whoops).
31647 - Make the tor-gencert man page get included correctly in the tarball.
31650 Changes in version 0.2.0.16-alpha - 2008-01-17
31651 Tor 0.2.0.16-alpha adds a fifth v3 directory authority run by Karsten
31652 Loesing, and generally cleans up a lot of features and minor bugs.
31654 o New directory authorities:
31655 - Set up gabelmoo (run by Karsten Loesing) as the fifth v3 directory
31658 o Major performance improvements:
31659 - Switch our old ring buffer implementation for one more like that
31660 used by free Unix kernels. The wasted space in a buffer with 1mb
31661 of data will now be more like 8k than 1mb. The new implementation
31662 also avoids realloc();realloc(); patterns that can contribute to
31663 memory fragmentation.
31666 - Configuration files now accept C-style strings as values. This
31667 helps encode characters not allowed in the current configuration
31668 file format, such as newline or #. Addresses bug 557.
31669 - Although we fixed bug 539 (where servers would send HTTP status 503
31670 responses _and_ send a body too), there are still servers out
31671 there that haven't upgraded. Therefore, make clients parse such
31672 bodies when they receive them.
31673 - When we're not serving v2 directory information, there is no reason
31674 to actually keep any around. Remove the obsolete files and directory
31675 on startup if they are very old and we aren't going to serve them.
31677 o Minor performance improvements:
31678 - Reference-count and share copies of address policy entries; only 5%
31679 of them were actually distinct.
31680 - Never walk through the list of logs if we know that no log is
31681 interested in a given message.
31684 - When an authority has not signed a consensus, do not try to
31685 download a nonexistent "certificate with key 00000000". Bugfix
31686 on 0.2.0.x. Fixes bug 569.
31687 - Fix a rare assert error when we're closing one of our threads:
31688 use a mutex to protect the list of logs, so we never write to the
31689 list as it's being freed. Bugfix on 0.1.2.x. Fixes the very rare
31690 bug 575, which is kind of the revenge of bug 222.
31691 - Patch from Karsten Loesing to complain less at both the client
31692 and the relay when a relay used to have the HSDir flag but doesn't
31693 anymore, and we try to upload a hidden service descriptor.
31694 - Stop leaking one cert per TLS context. Fixes bug 582. Bugfix on
31696 - Do not try to download missing certificates until we have tried
31697 to check our fallback consensus. Fixes bug 583.
31698 - Make bridges round reported GeoIP stats info up to the nearest
31699 estimate, not down. Now we can distinguish between "0 people from
31700 this country" and "1 person from this country".
31701 - Avoid a spurious free on base64 failure. Bugfix on 0.1.2.
31702 - Avoid possible segfault if key generation fails in
31703 crypto_pk_hybrid_encrypt. Bugfix on 0.2.0.
31704 - Avoid segfault in the case where a badly behaved v2 versioning
31705 directory sends a signed networkstatus with missing client-versions.
31707 - Avoid segfaults on certain complex invocations of
31708 router_get_by_hexdigest(). Bugfix on 0.1.2.
31709 - Correct bad index on array access in parse_http_time(). Bugfix
31711 - Fix possible bug in vote generation when server versions are present
31712 but client versions are not.
31713 - Fix rare bug on REDIRECTSTREAM control command when called with no
31714 port set: it could erroneously report an error when none had
31716 - Avoid bogus crash-prone, leak-prone tor_realloc when we're
31717 compressing large objects and find ourselves with more than 4k
31718 left over. Bugfix on 0.2.0.
31719 - Fix a small memory leak when setting up a hidden service.
31720 - Fix a few memory leaks that could in theory happen under bizarre
31722 - Fix an assert if we post a general-purpose descriptor via the
31723 control port but that descriptor isn't mentioned in our current
31724 network consensus. Bug reported by Jon McLachlan; bugfix on
31727 o Minor features (controller):
31728 - Get NS events working again. Patch from tup.
31729 - The GETCONF command now escapes and quotes configuration values
31730 that don't otherwise fit into the torrc file.
31731 - The SETCONF command now handles quoted values correctly.
31733 o Minor features (directory authorities):
31734 - New configuration options to override default maximum number of
31735 servers allowed on a single IP address. This is important for
31736 running a test network on a single host.
31737 - Actually implement the -s option to tor-gencert.
31738 - Add a manual page for tor-gencert.
31740 o Minor features (bridges):
31741 - Bridge authorities no longer serve bridge descriptors over
31742 unencrypted connections.
31744 o Minor features (other):
31745 - Add hidden services and DNSPorts to the list of things that make
31746 Tor accept that it has running ports. Change starting Tor with no
31747 ports from a fatal error to a warning; we might change it back if
31748 this turns out to confuse anybody. Fixes bug 579.
31751 Changes in version 0.1.2.19 - 2008-01-17
31752 Tor 0.1.2.19 fixes a huge memory leak on exit relays, makes the default
31753 exit policy a little bit more conservative so it's safer to run an
31754 exit relay on a home system, and fixes a variety of smaller issues.
31757 - Exit policies now reject connections that are addressed to a
31758 relay's public (external) IP address too, unless
31759 ExitPolicyRejectPrivate is turned off. We do this because too
31760 many relays are running nearby to services that trust them based
31761 on network address.
31764 - When the clock jumps forward a lot, do not allow the bandwidth
31765 buckets to become negative. Fixes bug 544.
31766 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
31767 on every successful resolve. Reported by Mike Perry.
31768 - Purge old entries from the "rephist" database and the hidden
31769 service descriptor database even when DirPort is zero.
31770 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
31771 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
31772 crashing or mis-answering these requests.
31773 - When we decide to send a 503 response to a request for servers, do
31774 not then also send the server descriptors: this defeats the whole
31775 purpose. Fixes bug 539.
31778 - Changing the ExitPolicyRejectPrivate setting should cause us to
31779 rebuild our server descriptor.
31780 - Fix handling of hex nicknames when answering controller requests for
31781 networkstatus by name, or when deciding whether to warn about
31782 unknown routers in a config option. (Patch from mwenge.)
31783 - Fix a couple of hard-to-trigger autoconf problems that could result
31784 in really weird results on platforms whose sys/types.h files define
31785 nonstandard integer types.
31786 - Don't try to create the datadir when running --verify-config or
31787 --hash-password. Resolves bug 540.
31788 - If we were having problems getting a particular descriptor from the
31789 directory caches, and then we learned about a new descriptor for
31790 that router, we weren't resetting our failure count. Reported
31792 - Although we fixed bug 539 (where servers would send HTTP status 503
31793 responses _and_ send a body too), there are still servers out there
31794 that haven't upgraded. Therefore, make clients parse such bodies
31795 when they receive them.
31796 - Run correctly on systems where rlim_t is larger than unsigned long.
31797 This includes some 64-bit systems.
31798 - Run correctly on platforms (like some versions of OS X 10.5) where
31799 the real limit for number of open files is OPEN_FILES, not rlim_max
31800 from getrlimit(RLIMIT_NOFILES).
31801 - Avoid a spurious free on base64 failure.
31802 - Avoid segfaults on certain complex invocations of
31803 router_get_by_hexdigest().
31804 - Fix rare bug on REDIRECTSTREAM control command when called with no
31805 port set: it could erroneously report an error when none had
31809 Changes in version 0.2.0.15-alpha - 2007-12-25
31810 Tor 0.2.0.14-alpha and 0.2.0.15-alpha fix a bunch of bugs with the
31811 features added in 0.2.0.13-alpha.
31814 - Fix several remotely triggerable asserts based on DirPort requests
31815 for a v2 or v3 networkstatus object before we were prepared. This
31816 was particularly bad for 0.2.0.13 and later bridge relays, who
31817 would never have a v2 networkstatus and would thus always crash
31818 when used. Bugfixes on 0.2.0.x.
31819 - Estimate the v3 networkstatus size more accurately, rather than
31820 estimating it at zero bytes and giving it artificially high priority
31821 compared to other directory requests. Bugfix on 0.2.0.x.
31824 - Fix configure.in logic for cross-compilation.
31825 - When we load a bridge descriptor from the cache, and it was
31826 previously unreachable, mark it as retriable so we won't just
31827 ignore it. Also, try fetching a new copy immediately. Bugfixes
31829 - The bridge GeoIP stats were counting other relays, for example
31830 self-reachability and authority-reachability tests.
31833 - Support compilation to target iPhone; patch from cjacker huang.
31834 To build for iPhone, pass the --enable-iphone option to configure.
31837 Changes in version 0.2.0.14-alpha - 2007-12-23
31839 - Fix a crash on startup if you install Tor 0.2.0.13-alpha fresh
31840 without a datadirectory from a previous Tor install. Reported
31842 - Fix a crash when we fetch a descriptor that turns out to be
31843 unexpected (it used to be in our networkstatus when we started
31844 fetching it, but it isn't in our current networkstatus), and we
31845 aren't using bridges. Bugfix on 0.2.0.x.
31846 - Fix a crash when accessing hidden services: it would work the first
31847 time you use a given introduction point for your service, but
31848 on subsequent requests we'd be using garbage memory. Fixed by
31849 Karsten Loesing. Bugfix on 0.2.0.13-alpha.
31850 - Fix a crash when we load a bridge descriptor from disk but we don't
31851 currently have a Bridge line for it in our torrc. Bugfix on
31855 - If bridge authorities set BridgePassword, they will serve a
31856 snapshot of known bridge routerstatuses from their DirPort to
31857 anybody who knows that password. Unset by default.
31860 - Make the unit tests build again.
31861 - Make "GETINFO/desc-annotations/id/<OR digest>" actually work.
31862 - Make PublishServerDescriptor default to 1, so the default doesn't
31863 have to change as we invent new directory protocol versions.
31864 - Fix test for rlim_t on OSX 10.3: sys/resource.h doesn't want to
31865 be included unless sys/time.h is already included. Fixes
31866 bug 553. Bugfix on 0.2.0.x.
31867 - If we receive a general-purpose descriptor and then receive an
31868 identical bridge-purpose descriptor soon after, don't discard
31869 the next one as a duplicate.
31872 - If BridgeRelay is set to 1, then the default for
31873 PublishServerDescriptor is now "bridge" rather than "v2,v3".
31874 - If the user sets RelayBandwidthRate but doesn't set
31875 RelayBandwidthBurst, then make them equal rather than erroring out.
31878 Changes in version 0.2.0.13-alpha - 2007-12-21
31879 Tor 0.2.0.13-alpha adds a fourth v3 directory authority run by Geoff
31880 Goodell, fixes many more bugs, and adds a lot of infrastructure for
31883 o New directory authorities:
31884 - Set up lefkada (run by Geoff Goodell) as the fourth v3 directory
31888 - Only update guard status (usable / not usable) once we have
31889 enough directory information. This was causing us to always pick
31890 two new guards on startup (bugfix on 0.2.0.9-alpha), and it was
31891 causing us to discard all our guards on startup if we hadn't been
31892 running for a few weeks (bugfix on 0.1.2.x). Fixes bug 448.
31893 - Purge old entries from the "rephist" database and the hidden
31894 service descriptor databases even when DirPort is zero. Bugfix
31896 - We were ignoring our RelayBandwidthRate for the first 30 seconds
31897 after opening a circuit -- even a relayed circuit. Bugfix on
31899 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
31900 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
31901 crashing or mis-answering these types of requests.
31902 - Relays were publishing their server descriptor to v1 and v2
31903 directory authorities, but they didn't try publishing to v3-only
31904 authorities. Fix this; and also stop publishing to v1 authorities.
31906 - When we were reading router descriptors from cache, we were ignoring
31907 the annotations -- so for example we were reading in bridge-purpose
31908 descriptors as general-purpose descriptors. Bugfix on 0.2.0.8-alpha.
31909 - When we decided to send a 503 response to a request for servers, we
31910 were then also sending the server descriptors: this defeats the
31911 whole purpose. Fixes bug 539; bugfix on 0.1.2.x.
31914 - Bridge relays now behave like clients with respect to time
31915 intervals for downloading new consensus documents -- otherwise they
31916 stand out. Bridge users now wait until the end of the interval,
31917 so their bridge relay will be sure to have a new consensus document.
31918 - Three new config options (AlternateDirAuthority,
31919 AlternateBridgeAuthority, and AlternateHSAuthority) that let the
31920 user selectively replace the default directory authorities by type,
31921 rather than the all-or-nothing replacement that DirServer offers.
31922 - Tor can now be configured to read a GeoIP file from disk in one
31923 of two formats. This can be used by controllers to map IP addresses
31924 to countries. Eventually, it may support exit-by-country.
31925 - When possible, bridge relays remember which countries users
31926 are coming from, and report aggregate information in their
31927 extra-info documents, so that the bridge authorities can learn
31928 where Tor is blocked.
31929 - Bridge directory authorities now do reachability testing on the
31930 bridges they know. They provide router status summaries to the
31931 controller via "getinfo ns/purpose/bridge", and also dump summaries
31932 to a file periodically.
31933 - Stop fetching directory info so aggressively if your DirPort is
31934 on but your ORPort is off; stop fetching v2 dir info entirely.
31935 You can override these choices with the new FetchDirInfoEarly
31939 - The fix in 0.2.0.12-alpha cleared the "hsdir" flag in v3 network
31940 consensus documents when there are too many relays at a single
31941 IP address. Now clear it in v2 network status documents too, and
31942 also clear it in routerinfo_t when the relay is no longer listed
31943 in the relevant networkstatus document.
31944 - Don't crash if we get an unexpected value for the
31945 PublishServerDescriptor config option. Reported by Matt Edman;
31946 bugfix on 0.2.0.9-alpha.
31947 - Our new v2 hidden service descriptor format allows descriptors
31948 that have no introduction points. But Tor crashed when we tried
31949 to build a descriptor with no intro points (and it would have
31950 crashed if we had tried to parse one). Bugfix on 0.2.0.x; patch
31951 by Karsten Loesing.
31952 - Fix building with dmalloc 5.5.2 with glibc.
31953 - Reject uploaded descriptors and extrainfo documents if they're
31954 huge. Otherwise we'll cache them all over the network and it'll
31955 clog everything up. Reported by Aljosha Judmayer.
31956 - Check for presence of s6_addr16 and s6_addr32 fields in in6_addr
31957 via autoconf. Should fix compile on solaris. Bugfix on 0.2.0.x.
31958 - When the DANGEROUS_VERSION controller status event told us we're
31959 running an obsolete version, it used the string "OLD" to describe
31960 it. Yet the "getinfo" interface used the string "OBSOLETE". Now use
31961 "OBSOLETE" in both cases. Bugfix on 0.1.2.x.
31962 - If we can't expand our list of entry guards (e.g. because we're
31963 using bridges or we have StrictEntryNodes set), don't mark relays
31964 down when they fail a directory request. Otherwise we're too quick
31965 to mark all our entry points down. Bugfix on 0.1.2.x.
31966 - Fix handling of hex nicknames when answering controller requests for
31967 networkstatus by name, or when deciding whether to warn about unknown
31968 routers in a config option. Bugfix on 0.1.2.x. (Patch from mwenge.)
31969 - Fix a couple of hard-to-trigger autoconf problems that could result
31970 in really weird results on platforms whose sys/types.h files define
31971 nonstandard integer types. Bugfix on 0.1.2.x.
31972 - Fix compilation with --disable-threads set. Bugfix on 0.2.0.x.
31973 - Don't crash on name lookup when we have no current consensus. Fixes
31974 bug 538; bugfix on 0.2.0.x.
31975 - Only Tors that want to mirror the v2 directory info should
31976 create the "cached-status" directory in their datadir. (All Tors
31977 used to create it.) Bugfix on 0.2.0.9-alpha.
31978 - Directory authorities should only automatically download Extra Info
31979 documents if they're v1, v2, or v3 authorities. Bugfix on 0.1.2.x.
31982 - On the USR1 signal, when dmalloc is in use, log the top 10 memory
31983 consumers. (We already do this on HUP.)
31984 - Authorities and caches fetch the v2 networkstatus documents
31985 less often, now that v3 is encouraged.
31986 - Add a new config option BridgeRelay that specifies you want to
31987 be a bridge relay. Right now the only difference is that it makes
31988 you answer begin_dir requests, and it makes you cache dir info,
31989 even if your DirPort isn't on.
31990 - Add "GETINFO/desc-annotations/id/<OR digest>" so controllers can
31991 ask about source, timestamp of arrival, purpose, etc. We need
31992 something like this to help Vidalia not do GeoIP lookups on bridge
31994 - Allow multiple HashedControlPassword config lines, to support
31995 multiple controller passwords.
31996 - Authorities now decide whether they're authoritative for a given
31997 router based on the router's purpose.
31998 - New config options AuthDirBadDir and AuthDirListBadDirs for
31999 authorities to mark certain relays as "bad directories" in the
32000 networkstatus documents. Also supports the "!baddir" directive in
32001 the approved-routers file.
32004 Changes in version 0.2.0.12-alpha - 2007-11-16
32005 This twelfth development snapshot fixes some more build problems as
32006 well as a few minor bugs.
32009 - Make it build on OpenBSD again. Patch from tup.
32010 - Substitute BINDIR and LOCALSTATEDIR in scripts. Fixes
32011 package-building for Red Hat, OS X, etc.
32013 o Minor bugfixes (on 0.1.2.x):
32014 - Changing the ExitPolicyRejectPrivate setting should cause us to
32015 rebuild our server descriptor.
32017 o Minor bugfixes (on 0.2.0.x):
32018 - When we're lacking a consensus, don't try to perform rendezvous
32019 operations. Reported by Karsten Loesing.
32020 - Fix a small memory leak whenever we decide against using a
32021 newly picked entry guard. Reported by Mike Perry.
32022 - When authorities detected more than two relays running on the same
32023 IP address, they were clearing all the status flags but forgetting
32024 to clear the "hsdir" flag. So clients were being told that a
32025 given relay was the right choice for a v2 hsdir lookup, yet they
32026 never had its descriptor because it was marked as 'not running'
32028 - If we're trying to fetch a bridge descriptor and there's no way
32029 the bridge authority could help us (for example, we don't know
32030 a digest, or there is no bridge authority), don't be so eager to
32031 fall back to asking the bridge authority.
32032 - If we're using bridges or have strictentrynodes set, and our
32033 chosen exit is in the same family as all our bridges/entry guards,
32034 then be flexible about families.
32037 - When we negotiate a v2 link-layer connection (not yet implemented),
32038 accept RELAY_EARLY cells and turn them into RELAY cells if we've
32039 negotiated a v1 connection for their next step. Initial code for
32043 Changes in version 0.2.0.11-alpha - 2007-11-12
32044 This eleventh development snapshot fixes some build problems with
32045 the previous snapshot. It also includes a more secure-by-default exit
32046 policy for relays, fixes an enormous memory leak for exit relays, and
32047 fixes another bug where servers were falling out of the directory list.
32050 - Exit policies now reject connections that are addressed to a
32051 relay's public (external) IP address too, unless
32052 ExitPolicyRejectPrivate is turned off. We do this because too
32053 many relays are running nearby to services that trust them based
32054 on network address. Bugfix on 0.1.2.x.
32057 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
32058 on every successful resolve. Reported by Mike Perry; bugfix
32060 - On authorities, never downgrade to old router descriptors simply
32061 because they're listed in the consensus. This created a catch-22
32062 where we wouldn't list a new descriptor because there was an
32063 old one in the consensus, and we couldn't get the new one in the
32064 consensus because we wouldn't list it. Possible fix for bug 548.
32065 Also, this might cause bug 543 to appear on authorities; if so,
32066 we'll need a band-aid for that. Bugfix on 0.2.0.9-alpha.
32068 o Packaging fixes on 0.2.0.10-alpha:
32069 - We were including instructions about what to do with the
32070 src/config/fallback-consensus file, but we weren't actually
32071 including it in the tarball. Disable all of that for now.
32074 - Allow people to say PreferTunnelledDirConns rather than
32075 PreferTunneledDirConns, for those alternate-spellers out there.
32078 - Don't reevaluate all the information from our consensus document
32079 just because we've downloaded a v2 networkstatus that we intend
32080 to cache. Fixes bug 545; bugfix on 0.2.0.x.
32083 Changes in version 0.2.0.10-alpha - 2007-11-10
32084 This tenth development snapshot adds a third v3 directory authority
32085 run by Mike Perry, adds most of Karsten Loesing's new hidden service
32086 descriptor format, fixes a bad crash bug and new bridge bugs introduced
32087 in 0.2.0.9-alpha, fixes many bugs with the v3 directory implementation,
32088 fixes some minor memory leaks in previous 0.2.0.x snapshots, and
32089 addresses many more minor issues.
32091 o New directory authorities:
32092 - Set up ides (run by Mike Perry) as the third v3 directory authority.
32095 - Allow tunnelled directory connections to ask for an encrypted
32096 "begin_dir" connection or an anonymized "uses a full Tor circuit"
32097 connection independently. Now we can make anonymized begin_dir
32098 connections for (e.g.) more secure hidden service posting and
32100 - More progress on proposal 114: code from Karsten Loesing to
32101 implement new hidden service descriptor format.
32102 - Raise the default BandwidthRate/BandwidthBurst to 5MB/10MB, to
32103 accommodate the growing number of servers that use the default
32104 and are reaching it.
32105 - Directory authorities use a new formula for selecting which nodes
32106 to advertise as Guards: they must be in the top 7/8 in terms of
32107 how long we have known about them, and above the median of those
32108 nodes in terms of weighted fractional uptime.
32109 - Make "not enough dir info yet" warnings describe *why* Tor feels
32110 it doesn't have enough directory info yet.
32113 - Stop servers from crashing if they set a Family option (or
32114 maybe in other situations too). Bugfix on 0.2.0.9-alpha; reported
32116 - Make bridge users work again -- the move to v3 directories in
32117 0.2.0.9-alpha had introduced a number of bugs that made bridges
32118 no longer work for clients.
32119 - When the clock jumps forward a lot, do not allow the bandwidth
32120 buckets to become negative. Bugfix on 0.1.2.x; fixes bug 544.
32122 o Major bugfixes (v3 dir, bugfixes on 0.2.0.9-alpha):
32123 - When the consensus lists a router descriptor that we previously were
32124 mirroring, but that we considered non-canonical, reload the
32125 descriptor as canonical. This fixes bug 543 where Tor servers
32126 would start complaining after a few days that they don't have
32127 enough directory information to build a circuit.
32128 - Consider replacing the current consensus when certificates arrive
32129 that make the pending consensus valid. Previously, we were only
32130 considering replacement when the new certs _didn't_ help.
32131 - Fix an assert error on startup if we didn't already have the
32132 consensus and certs cached in our datadirectory: we were caching
32133 the consensus in consensus_waiting_for_certs but then free'ing it
32135 - Avoid sending a request for "keys/fp" (for which we'll get a 400 Bad
32136 Request) if we need more v3 certs but we've already got pending
32137 requests for all of them.
32138 - Correctly back off from failing certificate downloads. Fixes
32140 - Authorities don't vote on the Running flag if they have been running
32141 for less than 30 minutes themselves. Fixes bug 547, where a newly
32142 started authority would vote that everyone was down.
32144 o New requirements:
32145 - Drop support for OpenSSL version 0.9.6. Just about nobody was using
32146 it, it had no AES, and it hasn't seen any security patches since
32150 - Clients now hold circuitless TLS connections open for 1.5 times
32151 MaxCircuitDirtiness (15 minutes), since it is likely that they'll
32152 rebuild a new circuit over them within that timeframe. Previously,
32153 they held them open only for KeepalivePeriod (5 minutes).
32154 - Use "If-Modified-Since" to avoid retrieving consensus
32155 networkstatuses that we already have.
32156 - When we have no consensus, check FallbackNetworkstatusFile (defaults
32157 to $PREFIX/share/tor/fallback-consensus) for a consensus. This way
32158 we start knowing some directory caches.
32159 - When we receive a consensus from the future, warn about skew.
32160 - Improve skew reporting: try to give the user a better log message
32161 about how skewed they are, and how much this matters.
32162 - When we have a certificate for an authority, believe that
32163 certificate's claims about the authority's IP address.
32164 - New --quiet command-line option to suppress the default console log.
32165 Good in combination with --hash-password.
32166 - Authorities send back an X-Descriptor-Not-New header in response to
32167 an accepted-but-discarded descriptor upload. Partially implements
32169 - Make the log message for "tls error. breaking." more useful.
32170 - Better log messages about certificate downloads, to attempt to
32171 track down the second incarnation of bug 546.
32173 o Minor features (bridges):
32174 - If bridge users set UpdateBridgesFromAuthority, but the digest
32175 they ask for is a 404 from the bridge authority, they now fall
32176 back to trying the bridge directly.
32177 - Bridges now use begin_dir to publish their server descriptor to
32178 the bridge authority, even when they haven't set TunnelDirConns.
32180 o Minor features (controller):
32181 - When reporting clock skew, and we know that the clock is _at least
32182 as skewed_ as some value, but we don't know the actual value,
32183 report the value as a "minimum skew."
32186 - Update linux-tor-prio.sh script to allow QoS based on the uid of
32187 the Tor process. Patch from Marco Bonetti with tweaks from Mike
32191 - Refuse to start if both ORPort and UseBridges are set. Bugfix
32192 on 0.2.0.x, suggested by Matt Edman.
32193 - Don't stop fetching descriptors when FetchUselessDescriptors is
32194 set, even if we stop asking for circuits. Bugfix on 0.1.2.x;
32195 reported by tup and ioerror.
32196 - Better log message on vote from unknown authority.
32197 - Don't log "Launching 0 request for 0 router" message.
32199 o Minor bugfixes (memory leaks):
32200 - Stop leaking memory every time we parse a v3 certificate. Bugfix
32202 - Stop leaking memory every time we load a v3 certificate. Bugfix
32203 on 0.2.0.1-alpha. Fixes bug 536.
32204 - Stop leaking a cached networkstatus on exit. Bugfix on
32206 - Stop leaking voter information every time we free a consensus.
32207 Bugfix on 0.2.0.3-alpha.
32208 - Stop leaking signed data every time we check a voter signature.
32209 Bugfix on 0.2.0.3-alpha.
32210 - Stop leaking a signature every time we fail to parse a consensus or
32211 a vote. Bugfix on 0.2.0.3-alpha.
32212 - Stop leaking v2_download_status_map on shutdown. Bugfix on
32214 - Stop leaking conn->nickname every time we make a connection to a
32215 Tor relay without knowing its expected identity digest (e.g. when
32216 using bridges). Bugfix on 0.2.0.3-alpha.
32218 - Minor bugfixes (portability):
32219 - Run correctly on platforms where rlim_t is larger than unsigned
32220 long, and/or where the real limit for number of open files is
32221 OPEN_FILES, not rlim_max from getrlimit(RLIMIT_NOFILES). In
32222 particular, these may be needed for OS X 10.5.
32225 Changes in version 0.1.2.18 - 2007-10-28
32226 Tor 0.1.2.18 fixes many problems including crash bugs, problems with
32227 hidden service introduction that were causing huge delays, and a big
32228 bug that was causing some servers to disappear from the network status
32229 lists for a few hours each day.
32231 o Major bugfixes (crashes):
32232 - If a connection is shut down abruptly because of something that
32233 happened inside connection_flushed_some(), do not call
32234 connection_finished_flushing(). Should fix bug 451:
32235 "connection_stop_writing: Assertion conn->write_event failed"
32236 Bugfix on 0.1.2.7-alpha.
32237 - Fix possible segfaults in functions called from
32238 rend_process_relay_cell().
32240 o Major bugfixes (hidden services):
32241 - Hidden services were choosing introduction points uniquely by
32242 hexdigest, but when constructing the hidden service descriptor
32243 they merely wrote the (potentially ambiguous) nickname.
32244 - Clients now use the v2 intro format for hidden service
32245 connections: they specify their chosen rendezvous point by identity
32246 digest rather than by (potentially ambiguous) nickname. These
32247 changes could speed up hidden service connections dramatically.
32249 o Major bugfixes (other):
32250 - Stop publishing a new server descriptor just because we get a
32251 HUP signal. This led (in a roundabout way) to some servers getting
32252 dropped from the networkstatus lists for a few hours each day.
32253 - When looking for a circuit to cannibalize, consider family as well
32254 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
32255 circuit cannibalization).
32256 - When a router wasn't listed in a new networkstatus, we were leaving
32257 the flags for that router alone -- meaning it remained Named,
32258 Running, etc -- even though absence from the networkstatus means
32259 that it shouldn't be considered to exist at all anymore. Now we
32260 clear all the flags for routers that fall out of the networkstatus
32261 consensus. Fixes bug 529.
32264 - Don't try to access (or alter) the state file when running
32265 --list-fingerprint or --verify-config or --hash-password. Resolves
32267 - When generating information telling us how to extend to a given
32268 router, do not try to include the nickname if it is
32269 absent. Resolves bug 467.
32270 - Fix a user-triggerable segfault in expand_filename(). (There isn't
32271 a way to trigger this remotely.)
32272 - When sending a status event to the controller telling it that an
32273 OR address is reachable, set the port correctly. (Previously we
32274 were reporting the dir port.)
32275 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
32276 command. Bugfix on 0.1.2.17.
32277 - When loading bandwidth history, do not believe any information in
32278 the future. Fixes bug 434.
32279 - When loading entry guard information, do not believe any information
32281 - When we have our clock set far in the future and generate an
32282 onion key, then re-set our clock to be correct, we should not stop
32283 the onion key from getting rotated.
32284 - On some platforms, accept() can return a broken address. Detect
32285 this more quietly, and deal accordingly. Fixes bug 483.
32286 - It's not actually an error to find a non-pending entry in the DNS
32287 cache when canceling a pending resolve. Don't log unless stuff
32288 is fishy. Resolves bug 463.
32289 - Don't reset trusted dir server list when we set a configuration
32290 option. Patch from Robert Hogan.
32291 - Don't try to create the datadir when running --verify-config or
32292 --hash-password. Resolves bug 540.
32295 Changes in version 0.2.0.9-alpha - 2007-10-24
32296 This ninth development snapshot switches clients to the new v3 directory
32297 system; allows servers to be listed in the network status even when they
32298 have the same nickname as a registered server; and fixes many other
32299 bugs including a big one that was causing some servers to disappear
32300 from the network status lists for a few hours each day.
32302 o Major features (directory system):
32303 - Clients now download v3 consensus networkstatus documents instead
32304 of v2 networkstatus documents. Clients and caches now base their
32305 opinions about routers on these consensus documents. Clients only
32306 download router descriptors listed in the consensus.
32307 - Authorities now list servers who have the same nickname as
32308 a different named server, but list them with a new flag,
32309 "Unnamed". Now we can list servers that happen to pick the same
32310 nickname as a server that registered two years ago and then
32311 disappeared. Partially implements proposal 122.
32312 - If the consensus lists a router as "Unnamed", the name is assigned
32313 to a different router: do not identify the router by that name.
32314 Partially implements proposal 122.
32315 - Authorities can now come to a consensus on which method to use to
32316 compute the consensus. This gives us forward compatibility.
32319 - Stop publishing a new server descriptor just because we HUP or
32320 when we find our DirPort to be reachable but won't actually publish
32321 it. New descriptors without any real changes are dropped by the
32322 authorities, and can screw up our "publish every 18 hours" schedule.
32324 - When a router wasn't listed in a new networkstatus, we were leaving
32325 the flags for that router alone -- meaning it remained Named,
32326 Running, etc -- even though absence from the networkstatus means
32327 that it shouldn't be considered to exist at all anymore. Now we
32328 clear all the flags for routers that fall out of the networkstatus
32329 consensus. Fixes bug 529; bugfix on 0.1.2.x.
32330 - Fix awful behavior in DownloadExtraInfo option where we'd fetch
32331 extrainfo documents and then discard them immediately for not
32332 matching the latest router. Bugfix on 0.2.0.1-alpha.
32334 o Minor features (v3 directory protocol):
32335 - Allow tor-gencert to generate a new certificate without replacing
32337 - Allow certificates to include an address.
32338 - When we change our directory-cache settings, reschedule all voting
32339 and download operations.
32340 - Reattempt certificate downloads immediately on failure, as long as
32341 we haven't failed a threshold number of times yet.
32342 - Delay retrying consensus downloads while we're downloading
32343 certificates to verify the one we just got. Also, count getting a
32344 consensus that we already have (or one that isn't valid) as a failure,
32345 and count failing to get the certificates after 20 minutes as a
32347 - Build circuits and download descriptors even if our consensus is a
32348 little expired. (This feature will go away once authorities are
32351 o Minor features (router descriptor cache):
32352 - If we find a cached-routers file that's been sitting around for more
32353 than 28 days unmodified, then most likely it's a leftover from
32354 when we upgraded to 0.2.0.8-alpha. Remove it. It has no good
32356 - When we (as a cache) download a descriptor because it was listed
32357 in a consensus, remember when the consensus was supposed to expire,
32358 and don't expire the descriptor until then.
32360 o Minor features (performance):
32361 - Call routerlist_remove_old_routers() much less often. This should
32362 speed startup, especially on directory caches.
32363 - Don't try to launch new descriptor downloads quite so often when we
32364 already have enough directory information to build circuits.
32365 - Base64 decoding was actually showing up on our profile when parsing
32366 the initial descriptor file; switch to an in-process all-at-once
32367 implementation that's about 3.5x times faster than calling out to
32370 o Minor features (compilation):
32371 - Detect non-ASCII platforms (if any still exist) and refuse to
32372 build there: some of our code assumes that 'A' is 65 and so on.
32374 o Minor bugfixes (v3 directory authorities, bugfixes on 0.2.0.x):
32375 - Make the "next period" votes into "current period" votes immediately
32376 after publishing the consensus; avoid a heisenbug that made them
32377 stick around indefinitely.
32378 - When we discard a vote as a duplicate, do not report this as
32380 - Treat missing v3 keys or certificates as an error when running as a
32381 v3 directory authority.
32382 - When we're configured to be a v3 authority, but we're only listed
32383 as a non-v3 authority in our DirServer line for ourself, correct
32385 - If an authority doesn't have a qualified hostname, just put
32386 its address in the vote. This fixes the problem where we referred to
32387 "moria on moria:9031."
32388 - Distinguish between detached signatures for the wrong period, and
32389 detached signatures for a divergent vote.
32390 - Fix a small memory leak when computing a consensus.
32391 - When there's no consensus, we were forming a vote every 30
32392 minutes, but writing the "valid-after" line in our vote based
32393 on our configured V3AuthVotingInterval: so unless the intervals
32394 matched up, we immediately rejected our own vote because it didn't
32395 start at the voting interval that caused us to construct a vote.
32397 o Minor bugfixes (v3 directory protocol, bugfixes on 0.2.0.x):
32398 - Delete unverified-consensus when the real consensus is set.
32399 - Consider retrying a consensus networkstatus fetch immediately
32400 after one fails: don't wait 60 seconds to notice.
32401 - When fetching a consensus as a cache, wait until a newer consensus
32402 should exist before trying to replace the current one.
32403 - Use a more forgiving schedule for retrying failed consensus
32404 downloads than for other types.
32406 o Minor bugfixes (other directory issues):
32407 - Correct the implementation of "download votes by digest." Bugfix on
32409 - Authorities no longer send back "400 you're unreachable please fix
32410 it" errors to Tor servers that aren't online all the time. We're
32411 supposed to tolerate these servers now. Bugfix on 0.1.2.x.
32413 o Minor bugfixes (controller):
32414 - Don't reset trusted dir server list when we set a configuration
32415 option. Patch from Robert Hogan; bugfix on 0.1.2.x.
32416 - Respond to INT and TERM SIGNAL commands before we execute the
32417 signal, in case the signal shuts us down. We had a patch in
32418 0.1.2.1-alpha that tried to do this by queueing the response on
32419 the connection's buffer before shutting down, but that really
32420 isn't the same thing at all. Bug located by Matt Edman.
32422 o Minor bugfixes (misc):
32423 - Correctly check for bad options to the "PublishServerDescriptor"
32424 config option. Bugfix on 0.2.0.1-alpha; reported by Matt Edman.
32425 - Stop leaking memory on failing case of base32_decode, and make
32426 it accept upper-case letters. Bugfixes on 0.2.0.7-alpha.
32427 - Don't try to download extrainfo documents when we're trying to
32428 fetch enough directory info to build a circuit: having enough
32429 info should get priority. Bugfix on 0.2.0.x.
32430 - Don't complain that "your server has not managed to confirm that its
32431 ports are reachable" if we haven't been able to build any circuits
32432 yet. Bug found by spending four hours without a v3 consensus. Bugfix
32434 - Detect the reason for failing to mmap a descriptor file we just
32435 wrote, and give a more useful log message. Fixes bug 533. Bugfix
32438 o Code simplifications and refactoring:
32439 - Remove support for the old bw_accounting file: we've been storing
32440 bandwidth accounting information in the state file since
32441 0.1.2.5-alpha. This may result in bandwidth accounting errors
32442 if you try to upgrade from 0.1.1.x or earlier, or if you try to
32443 downgrade to 0.1.1.x or earlier.
32444 - New convenience code to locate a file within the DataDirectory.
32445 - Move non-authority functionality out of dirvote.c.
32446 - Refactor the arguments for router_pick_{directory_|trusteddir}server
32447 so that they all take the same named flags.
32450 - Include the "tor-ctrl.sh" bash script by Stefan Behte to provide
32451 Unix users an easy way to script their Tor process (e.g. by
32452 adjusting bandwidth based on the time of the day).
32455 Changes in version 0.2.0.8-alpha - 2007-10-12
32456 This eighth development snapshot fixes a crash bug that's been bothering
32457 us since February 2007, lets bridge authorities store a list of bridge
32458 descriptors they've seen, gets v3 directory voting closer to working,
32459 starts caching v3 directory consensus documents on directory mirrors,
32460 and fixes a variety of smaller issues including some minor memory leaks.
32462 o Major features (router descriptor cache):
32463 - Store routers in a file called cached-descriptors instead of in
32464 cached-routers. Initialize cached-descriptors from cached-routers
32465 if the old format is around. The new format allows us to store
32466 annotations along with descriptors.
32467 - Use annotations to record the time we received each descriptor, its
32468 source, and its purpose.
32469 - Disable the SETROUTERPURPOSE controller command: it is now
32471 - Controllers should now specify cache=no or cache=yes when using
32472 the +POSTDESCRIPTOR command.
32473 - Bridge authorities now write bridge descriptors to disk, meaning
32474 we can export them to other programs and begin distributing them
32477 o Major features (directory authorities):
32478 - When a v3 authority is missing votes or signatures, it now tries
32480 - Directory authorities track weighted fractional uptime as well as
32481 weighted mean-time-between failures. WFU is suitable for deciding
32482 whether a node is "usually up", while MTBF is suitable for deciding
32483 whether a node is "likely to stay up." We need both, because
32484 "usually up" is a good requirement for guards, while "likely to
32485 stay up" is a good requirement for long-lived connections.
32487 o Major features (v3 directory system):
32488 - Caches now download v3 network status documents as needed,
32489 and download the descriptors listed in them.
32490 - All hosts now attempt to download and keep fresh v3 authority
32491 certificates, and re-attempt after failures.
32492 - More internal-consistency checks for vote parsing.
32494 o Major bugfixes (crashes):
32495 - If a connection is shut down abruptly because of something that
32496 happened inside connection_flushed_some(), do not call
32497 connection_finished_flushing(). Should fix bug 451. Bugfix on
32500 o Major bugfixes (performance):
32501 - Fix really bad O(n^2) performance when parsing a long list of
32502 routers: Instead of searching the entire list for an "extra-info "
32503 string which usually wasn't there, once for every routerinfo
32504 we read, just scan lines forward until we find one we like.
32506 - When we add data to a write buffer in response to the data on that
32507 write buffer getting low because of a flush, do not consider the
32508 newly added data as a candidate for immediate flushing, but rather
32509 make it wait until the next round of writing. Otherwise, we flush
32510 and refill recursively, and a single greedy TLS connection can
32511 eat all of our bandwidth. Bugfix on 0.1.2.7-alpha.
32513 o Minor features (v3 authority system):
32514 - Add more ways for tools to download the votes that lead to the
32516 - Send a 503 when low on bandwidth and a vote, consensus, or
32517 certificate is requested.
32518 - If-modified-since is now implemented properly for all kinds of
32519 certificate requests.
32521 o Minor bugfixes (network statuses):
32522 - Tweak the implementation of proposal 109 slightly: allow at most
32523 two Tor servers on the same IP address, except if it's the location
32524 of a directory authority, in which case allow five. Bugfix on
32527 o Minor bugfixes (controller):
32528 - When sending a status event to the controller telling it that an
32529 OR address is reachable, set the port correctly. (Previously we
32530 were reporting the dir port.) Bugfix on 0.1.2.x.
32532 o Minor bugfixes (v3 directory system):
32533 - Fix logic to look up a cert by its signing key digest. Bugfix on
32535 - Only change the reply to a vote to "OK" if it's not already
32536 set. This gets rid of annoying "400 OK" log messages, which may
32537 have been masking some deeper issue. Bugfix on 0.2.0.7-alpha.
32538 - When we get a valid consensus, recompute the voting schedule.
32539 - Base the valid-after time of a vote on the consensus voting
32540 schedule, not on our preferred schedule.
32541 - Make the return values and messages from signature uploads and
32542 downloads more sensible.
32543 - Fix a memory leak when serving votes and consensus documents, and
32544 another when serving certificates.
32546 o Minor bugfixes (performance):
32547 - Use a slightly simpler string hashing algorithm (copying Python's
32548 instead of Java's) and optimize our digest hashing algorithm to take
32549 advantage of 64-bit platforms and to remove some possibly-costly
32551 - Fix a minor memory leak whenever we parse guards from our state
32552 file. Bugfix on 0.2.0.7-alpha.
32553 - Fix a minor memory leak whenever we write out a file. Bugfix on
32555 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
32556 command. Bugfix on 0.2.0.5-alpha.
32558 o Minor bugfixes (portability):
32559 - On some platforms, accept() can return a broken address. Detect
32560 this more quietly, and deal accordingly. Fixes bug 483.
32561 - Stop calling tor_strlower() on uninitialized memory in some cases.
32562 Bugfix in 0.2.0.7-alpha.
32564 o Minor bugfixes (usability):
32565 - Treat some 403 responses from directory servers as INFO rather than
32566 WARN-severity events.
32567 - It's not actually an error to find a non-pending entry in the DNS
32568 cache when canceling a pending resolve. Don't log unless stuff is
32569 fishy. Resolves bug 463.
32571 o Minor bugfixes (anonymity):
32572 - Never report that we've used more bandwidth than we're willing to
32573 relay: it leaks how much non-relay traffic we're using. Resolves
32575 - When looking for a circuit to cannibalize, consider family as well
32576 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
32577 circuit cannibalization).
32579 o Code simplifications and refactoring:
32580 - Make a bunch of functions static. Remove some dead code.
32581 - Pull out about a third of the really big routerlist.c; put it in a
32582 new module, networkstatus.c.
32583 - Merge the extra fields in local_routerstatus_t back into
32584 routerstatus_t: we used to need one routerstatus_t for each
32585 authority's opinion, plus a local_routerstatus_t for the locally
32586 computed consensus opinion. To save space, we put the locally
32587 modified fields into local_routerstatus_t, and only the common
32588 stuff into routerstatus_t. But once v3 directories are in use,
32589 clients and caches will no longer need to hold authority opinions;
32590 thus, the rationale for keeping the types separate is now gone.
32591 - Make the code used to reschedule and reattempt downloads more
32593 - Turn all 'Are we a directory server/mirror?' logic into a call to
32595 - Remove the code to generate the oldest (v1) directory format.
32596 The code has been disabled since 0.2.0.5-alpha.
32599 Changes in version 0.2.0.7-alpha - 2007-09-21
32600 This seventh development snapshot makes bridges work again, makes bridge
32601 authorities work for the first time, fixes two huge performance flaws
32602 in hidden services, and fixes a variety of minor issues.
32604 o New directory authorities:
32605 - Set up moria1 and tor26 as the first v3 directory authorities. See
32606 doc/spec/dir-spec.txt for details on the new directory design.
32608 o Major bugfixes (crashes):
32609 - Fix possible segfaults in functions called from
32610 rend_process_relay_cell(). Bugfix on 0.1.2.x.
32612 o Major bugfixes (bridges):
32613 - Fix a bug that made servers send a "404 Not found" in response to
32614 attempts to fetch their server descriptor. This caused Tor servers
32615 to take many minutes to establish reachability for their DirPort,
32616 and it totally crippled bridges. Bugfix on 0.2.0.5-alpha.
32617 - Make "UpdateBridgesFromAuthority" torrc option work: when bridge
32618 users configure that and specify a bridge with an identity
32619 fingerprint, now they will lookup the bridge descriptor at the
32620 default bridge authority via a one-hop tunnel, but once circuits
32621 are established they will switch to a three-hop tunnel for later
32622 connections to the bridge authority. Bugfix in 0.2.0.3-alpha.
32624 o Major bugfixes (hidden services):
32625 - Hidden services were choosing introduction points uniquely by
32626 hexdigest, but when constructing the hidden service descriptor
32627 they merely wrote the (potentially ambiguous) nickname.
32628 - Clients now use the v2 intro format for hidden service
32629 connections: they specify their chosen rendezvous point by identity
32630 digest rather than by (potentially ambiguous) nickname. Both
32631 are bugfixes on 0.1.2.x, and they could speed up hidden service
32632 connections dramatically. Thanks to Karsten Loesing.
32634 o Minor features (security):
32635 - As a client, do not believe any server that tells us that an
32636 address maps to an internal address space.
32637 - Make it possible to enable HashedControlPassword and
32638 CookieAuthentication at the same time.
32640 o Minor features (guard nodes):
32641 - Tag every guard node in our state file with the version that
32642 we believe added it, or with our own version if we add it. This way,
32643 if a user temporarily runs an old version of Tor and then switches
32644 back to a new one, she doesn't automatically lose her guards.
32646 o Minor features (speed):
32647 - When implementing AES counter mode, update only the portions of the
32648 counter buffer that need to change, and don't keep separate
32649 network-order and host-order counters when they are the same (i.e.,
32650 on big-endian hosts.)
32652 o Minor features (controller):
32653 - Accept LF instead of CRLF on controller, since some software has a
32654 hard time generating real Internet newlines.
32655 - Add GETINFO values for the server status events
32656 "REACHABILITY_SUCCEEDED" and "GOOD_SERVER_DESCRIPTOR". Patch from
32659 o Removed features:
32660 - Routers no longer include bandwidth-history lines in their
32661 descriptors; this information is already available in extra-info
32662 documents, and including it in router descriptors took up 60%
32663 (!) of compressed router descriptor downloads. Completes
32664 implementation of proposal 104.
32665 - Remove the contrib scripts ExerciseServer.py, PathDemo.py,
32666 and TorControl.py, as they use the old v0 controller protocol,
32667 and are obsoleted by TorFlow anyway.
32668 - Drop support for v1 rendezvous descriptors, since we never used
32669 them anyway, and the code has probably rotted by now. Based on
32670 patch from Karsten Loesing.
32671 - On OSX, stop warning the user that kqueue support in libevent is
32672 "experimental", since it seems to have worked fine for ages.
32675 - When generating information telling us how to extend to a given
32676 router, do not try to include the nickname if it is absent. Fixes
32677 bug 467. Bugfix on 0.2.0.3-alpha.
32678 - Fix a user-triggerable (but not remotely-triggerable) segfault
32679 in expand_filename(). Bugfix on 0.1.2.x.
32680 - Fix a memory leak when freeing incomplete requests from DNSPort.
32681 Found by Niels Provos with valgrind. Bugfix on 0.2.0.1-alpha.
32682 - Don't try to access (or alter) the state file when running
32683 --list-fingerprint or --verify-config or --hash-password. (Resolves
32684 bug 499.) Bugfix on 0.1.2.x.
32685 - Servers used to decline to publish their DirPort if their
32686 BandwidthRate, RelayBandwidthRate, or MaxAdvertisedBandwidth
32687 were below a threshold. Now they only look at BandwidthRate and
32688 RelayBandwidthRate. Bugfix on 0.1.2.x.
32689 - Remove an optimization in the AES counter-mode code that assumed
32690 that the counter never exceeded 2^68. When the counter can be set
32691 arbitrarily as an IV (as it is by Karsten's new hidden services
32692 code), this assumption no longer holds. Bugfix on 0.1.2.x.
32693 - Resume listing "AUTHORITY" flag for authorities in network status.
32694 Bugfix on 0.2.0.3-alpha; reported by Alex de Joode.
32696 o Code simplifications and refactoring:
32697 - Revamp file-writing logic so we don't need to have the entire
32698 contents of a file in memory at once before we write to disk. Tor,
32700 - Turn "descriptor store" into a full-fledged type.
32701 - Move all NT services code into a separate source file.
32702 - Unify all code that computes medians, percentile elements, etc.
32703 - Get rid of a needless malloc when parsing address policies.
32706 Changes in version 0.1.2.17 - 2007-08-30
32707 Tor 0.1.2.17 features a new Vidalia version in the Windows and OS
32708 X bundles. Vidalia 0.0.14 makes authentication required for the
32709 ControlPort in the default configuration, which addresses important
32710 security risks. Everybody who uses Vidalia (or another controller)
32713 In addition, this Tor update fixes major load balancing problems with
32714 path selection, which should speed things up a lot once many people
32717 o Major bugfixes (security):
32718 - We removed support for the old (v0) control protocol. It has been
32719 deprecated since Tor 0.1.1.1-alpha, and keeping it secure has
32720 become more of a headache than it's worth.
32722 o Major bugfixes (load balancing):
32723 - When choosing nodes for non-guard positions, weight guards
32724 proportionally less, since they already have enough load. Patch
32726 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
32727 will allow fast Tor servers to get more attention.
32728 - When we're upgrading from an old Tor version, forget our current
32729 guards and pick new ones according to the new weightings. These
32730 three load balancing patches could raise effective network capacity
32731 by a factor of four. Thanks to Mike Perry for measurements.
32733 o Major bugfixes (stream expiration):
32734 - Expire not-yet-successful application streams in all cases if
32735 they've been around longer than SocksTimeout. Right now there are
32736 some cases where the stream will live forever, demanding a new
32737 circuit every 15 seconds. Fixes bug 454; reported by lodger.
32739 o Minor features (controller):
32740 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
32741 is valid before any authentication has been received. It tells
32742 a controller what kind of authentication is expected, and what
32743 protocol is spoken. Implements proposal 119.
32745 o Minor bugfixes (performance):
32746 - Save on most routerlist_assert_ok() calls in routerlist.c, thus
32747 greatly speeding up loading cached-routers from disk on startup.
32748 - Disable sentinel-based debugging for buffer code: we squashed all
32749 the bugs that this was supposed to detect a long time ago, and now
32750 its only effect is to change our buffer sizes from nice powers of
32751 two (which platform mallocs tend to like) to values slightly over
32752 powers of two (which make some platform mallocs sad).
32754 o Minor bugfixes (misc):
32755 - If exit bandwidth ever exceeds one third of total bandwidth, then
32756 use the correct formula to weight exit nodes when choosing paths.
32757 Based on patch from Mike Perry.
32758 - Choose perfectly fairly among routers when choosing by bandwidth and
32759 weighting by fraction of bandwidth provided by exits. Previously, we
32760 would choose with only approximate fairness, and correct ourselves
32761 if we ran off the end of the list.
32762 - If we require CookieAuthentication but we fail to write the
32763 cookie file, we would warn but not exit, and end up in a state
32764 where no controller could authenticate. Now we exit.
32765 - If we require CookieAuthentication, stop generating a new cookie
32766 every time we change any piece of our config.
32767 - Refuse to start with certain directory authority keys, and
32768 encourage people using them to stop.
32769 - Terminate multi-line control events properly. Original patch
32771 - Fix a minor memory leak when we fail to find enough suitable
32772 servers to choose a circuit.
32773 - Stop leaking part of the descriptor when we run into a particularly
32774 unparseable piece of it.
32777 Changes in version 0.2.0.6-alpha - 2007-08-26
32778 This sixth development snapshot features a new Vidalia version in the
32779 Windows and OS X bundles. Vidalia 0.0.14 makes authentication required for
32780 the ControlPort in the default configuration, which addresses important
32783 In addition, this snapshot fixes major load balancing problems
32784 with path selection, which should speed things up a lot once many
32785 people have upgraded. The directory authorities also use a new
32786 mean-time-between-failure approach to tracking which servers are stable,
32787 rather than just looking at the most recent uptime.
32789 o New directory authorities:
32790 - Set up Tonga as the default bridge directory authority.
32793 - Directory authorities now track servers by weighted
32794 mean-times-between-failures. When we have 4 or more days of data,
32795 use measured MTBF rather than declared uptime to decide whether
32796 to call a router Stable. Implements proposal 108.
32798 o Major bugfixes (load balancing):
32799 - When choosing nodes for non-guard positions, weight guards
32800 proportionally less, since they already have enough load. Patch
32802 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
32803 will allow fast Tor servers to get more attention.
32804 - When we're upgrading from an old Tor version, forget our current
32805 guards and pick new ones according to the new weightings. These
32806 three load balancing patches could raise effective network capacity
32807 by a factor of four. Thanks to Mike Perry for measurements.
32809 o Major bugfixes (descriptor parsing):
32810 - Handle unexpected whitespace better in malformed descriptors. Bug
32811 found using Benedikt Boss's new Tor fuzzer! Bugfix on 0.2.0.x.
32814 - There is now an ugly, temporary "desc/all-recent-extrainfo-hack"
32815 GETINFO for Torstat to use until it can switch to using extrainfos.
32816 - Optionally (if built with -DEXPORTMALLINFO) export the output
32817 of mallinfo via http, as tor/mallinfo.txt. Only accessible
32821 - Do not intermix bridge routers with controller-added
32822 routers. (Bugfix on 0.2.0.x)
32823 - Do not fail with an assert when accept() returns an unexpected
32824 address family. Addresses but does not wholly fix bug 483. (Bugfix
32826 - Let directory authorities startup even when they can't generate
32827 a descriptor immediately, e.g. because they don't know their
32829 - Stop putting the authentication cookie in a file called "0"
32830 in your working directory if you don't specify anything for the
32831 new CookieAuthFile option. Reported by Matt Edman.
32832 - Make it possible to read the PROTOCOLINFO response in a way that
32833 conforms to our control-spec. Reported by Matt Edman.
32834 - Fix a minor memory leak when we fail to find enough suitable
32835 servers to choose a circuit. Bugfix on 0.1.2.x.
32836 - Stop leaking part of the descriptor when we run into a particularly
32837 unparseable piece of it. Bugfix on 0.1.2.x.
32838 - Unmap the extrainfo cache file on exit.
32841 Changes in version 0.2.0.5-alpha - 2007-08-19
32842 This fifth development snapshot fixes compilation on Windows again;
32843 fixes an obnoxious client-side bug that slowed things down and put
32844 extra load on the network; gets us closer to using the v3 directory
32845 voting scheme; makes it easier for Tor controllers to use cookie-based
32846 authentication; and fixes a variety of other bugs.
32848 o Removed features:
32849 - Version 1 directories are no longer generated in full. Instead,
32850 authorities generate and serve "stub" v1 directories that list
32851 no servers. This will stop Tor versions 0.1.0.x and earlier from
32852 working, but (for security reasons) nobody should be running those
32855 o Major bugfixes (compilation, 0.2.0.x):
32856 - Try to fix Win32 compilation again: improve checking for IPv6 types.
32857 - Try to fix MSVC compilation: build correctly on platforms that do
32858 not define s6_addr16 or s6_addr32.
32859 - Fix compile on platforms without getaddrinfo: bug found by Li-Hui
32862 o Major bugfixes (stream expiration):
32863 - Expire not-yet-successful application streams in all cases if
32864 they've been around longer than SocksTimeout. Right now there are
32865 some cases where the stream will live forever, demanding a new
32866 circuit every 15 seconds. Bugfix on 0.1.2.7-alpha; fixes bug 454;
32867 reported by lodger.
32869 o Minor features (directory servers):
32870 - When somebody requests a list of statuses or servers, and we have
32871 none of those, return a 404 rather than an empty 200.
32873 o Minor features (directory voting):
32874 - Store v3 consensus status consensuses on disk, and reload them
32877 o Minor features (security):
32878 - Warn about unsafe ControlPort configurations.
32879 - Refuse to start with certain directory authority keys, and
32880 encourage people using them to stop.
32882 o Minor features (controller):
32883 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
32884 is valid before any authentication has been received. It tells
32885 a controller what kind of authentication is expected, and what
32886 protocol is spoken. Implements proposal 119.
32887 - New config option CookieAuthFile to choose a new location for the
32888 cookie authentication file, and config option
32889 CookieAuthFileGroupReadable to make it group-readable.
32891 o Minor features (unit testing):
32892 - Add command-line arguments to unit-test executable so that we can
32893 invoke any chosen test from the command line rather than having
32894 to run the whole test suite at once; and so that we can turn on
32895 logging for the unit tests.
32897 o Minor bugfixes (on 0.1.2.x):
32898 - If we require CookieAuthentication but we fail to write the
32899 cookie file, we would warn but not exit, and end up in a state
32900 where no controller could authenticate. Now we exit.
32901 - If we require CookieAuthentication, stop generating a new cookie
32902 every time we change any piece of our config.
32903 - When loading bandwidth history, do not believe any information in
32904 the future. Fixes bug 434.
32905 - When loading entry guard information, do not believe any information
32907 - When we have our clock set far in the future and generate an
32908 onion key, then re-set our clock to be correct, we should not stop
32909 the onion key from getting rotated.
32910 - Clean up torrc sample config file.
32911 - Do not automatically run configure from autogen.sh. This
32912 non-standard behavior tended to annoy people who have built other
32915 o Minor bugfixes (on 0.2.0.x):
32916 - Fix a bug with AutomapHostsOnResolve that would always cause
32917 the second request to fail. Bug reported by Kate. Bugfix on
32919 - Fix a bug in ADDRMAP controller replies that would sometimes
32920 try to print a NULL. Patch from tup.
32921 - Read v3 directory authority keys from the right location.
32922 - Numerous bugfixes to directory voting code.
32925 Changes in version 0.1.2.16 - 2007-08-01
32926 Tor 0.1.2.16 fixes a critical security vulnerability that allows a
32927 remote attacker in certain situations to rewrite the user's torrc
32928 configuration file. This can completely compromise anonymity of users
32929 in most configurations, including those running the Vidalia bundles,
32930 TorK, etc. Or worse.
32932 o Major security fixes:
32933 - Close immediately after missing authentication on control port;
32934 do not allow multiple authentication attempts.
32937 Changes in version 0.2.0.4-alpha - 2007-08-01
32938 This fourth development snapshot fixes a critical security vulnerability
32939 for most users, specifically those running Vidalia, TorK, etc. Everybody
32940 should upgrade to either 0.1.2.16 or 0.2.0.4-alpha.
32942 o Major security fixes:
32943 - Close immediately after missing authentication on control port;
32944 do not allow multiple authentication attempts.
32946 o Major bugfixes (compilation):
32947 - Fix win32 compilation: apparently IN_ADDR and IN6_ADDR are already
32950 o Minor features (performance):
32951 - Be even more aggressive about releasing RAM from small
32952 empty buffers. Thanks to our free-list code, this shouldn't be too
32953 performance-intensive.
32954 - Disable sentinel-based debugging for buffer code: we squashed all
32955 the bugs that this was supposed to detect a long time ago, and
32956 now its only effect is to change our buffer sizes from nice
32957 powers of two (which platform mallocs tend to like) to values
32958 slightly over powers of two (which make some platform mallocs sad).
32959 - Log malloc statistics from mallinfo() on platforms where it
32963 Changes in version 0.2.0.3-alpha - 2007-07-29
32964 This third development snapshot introduces new experimental
32965 blocking-resistance features and a preliminary version of the v3
32966 directory voting design, and includes many other smaller features
32970 - The first pieces of our "bridge" design for blocking-resistance
32971 are implemented. People can run bridge directory authorities;
32972 people can run bridges; and people can configure their Tor clients
32973 with a set of bridges to use as the first hop into the Tor network.
32974 See http://archives.seul.org/or/talk/Jul-2007/msg00249.html for
32976 - Create listener connections before we setuid to the configured
32977 User and Group. Now non-Windows users can choose port values
32978 under 1024, start Tor as root, and have Tor bind those ports
32979 before it changes to another UID. (Windows users could already
32981 - Added a new ConstrainedSockets config option to set SO_SNDBUF and
32982 SO_RCVBUF on TCP sockets. Hopefully useful for Tor servers running
32983 on "vserver" accounts. (Patch from coderman.)
32984 - Be even more aggressive about separating local traffic from relayed
32985 traffic when RelayBandwidthRate is set. (Refines proposal 111.)
32987 o Major features (experimental):
32988 - First cut of code for "v3 dir voting": directory authorities will
32989 vote on a common network status document rather than each publishing
32990 their own opinion. This code needs more testing and more corner-case
32991 handling before it's ready for use.
32994 - Directory authorities now call routers Fast if their bandwidth is
32995 at least 100KB/s, and consider their bandwidth adequate to be a
32996 Guard if it is at least 250KB/s, no matter the medians. This fix
32997 complements proposal 107. [Bugfix on 0.1.2.x]
32998 - Directory authorities now never mark more than 3 servers per IP as
32999 Valid and Running. (Implements proposal 109, by Kevin Bauer and
33001 - Minor change to organizationName and commonName generation
33002 procedures in TLS certificates during Tor handshakes, to invalidate
33003 some earlier censorware approaches. This is not a long-term
33004 solution, but applying it will give us a bit of time to look into
33005 the epidemiology of countermeasures as they spread.
33007 o Major bugfixes (directory):
33008 - Rewrite directory tokenization code to never run off the end of
33009 a string. Fixes bug 455. Patch from croup. [Bugfix on 0.1.2.x]
33011 o Minor features (controller):
33012 - Add a SOURCE_ADDR field to STREAM NEW events so that controllers can
33013 match requests to applications. (Patch from Robert Hogan.)
33014 - Report address and port correctly on connections to DNSPort. (Patch
33015 from Robert Hogan.)
33016 - Add a RESOLVE command to launch hostname lookups. (Original patch
33017 from Robert Hogan.)
33018 - Add GETINFO status/enough-dir-info to let controllers tell whether
33019 Tor has downloaded sufficient directory information. (Patch
33021 - You can now use the ControlSocket option to tell Tor to listen for
33022 controller connections on Unix domain sockets on systems that
33023 support them. (Patch from Peter Palfrader.)
33024 - STREAM NEW events are generated for DNSPort requests and for
33025 tunneled directory connections. (Patch from Robert Hogan.)
33026 - New "GETINFO address-mappings/*" command to get address mappings
33027 with expiry information. "addr-mappings/*" is now deprecated.
33030 o Minor features (misc):
33031 - Merge in some (as-yet-unused) IPv6 address manipulation code. (Patch
33033 - The tor-gencert tool for v3 directory authorities now creates all
33034 files as readable to the file creator only, and write-protects
33035 the authority identity key.
33036 - When dumping memory usage, list bytes used in buffer memory
33038 - When running with dmalloc, dump more stats on hup and on exit.
33039 - Directory authorities now fail quickly and (relatively) harmlessly
33040 if they generate a network status document that is somehow
33043 o Traffic load balancing improvements:
33044 - If exit bandwidth ever exceeds one third of total bandwidth, then
33045 use the correct formula to weight exit nodes when choosing paths.
33046 (Based on patch from Mike Perry.)
33047 - Choose perfectly fairly among routers when choosing by bandwidth and
33048 weighting by fraction of bandwidth provided by exits. Previously, we
33049 would choose with only approximate fairness, and correct ourselves
33050 if we ran off the end of the list. [Bugfix on 0.1.2.x]
33052 o Performance improvements:
33053 - Be more aggressive with freeing buffer RAM or putting it on the
33055 - Use Critical Sections rather than Mutexes for synchronizing threads
33056 on win32; Mutexes are heavier-weight, and designed for synchronizing
33059 o Deprecated and removed features:
33060 - RedirectExits is now deprecated.
33061 - Stop allowing address masks that do not correspond to bit prefixes.
33062 We have warned about these for a really long time; now it's time
33063 to reject them. (Patch from croup.)
33065 o Minor bugfixes (directory):
33066 - Fix another crash bug related to extra-info caching. (Bug found by
33067 Peter Palfrader.) [Bugfix on 0.2.0.2-alpha]
33068 - Directories no longer return a "304 not modified" when they don't
33069 have the networkstatus the client asked for. Also fix a memory
33070 leak when returning 304 not modified. [Bugfixes on 0.2.0.2-alpha]
33071 - We had accidentally labelled 0.1.2.x directory servers as not
33072 suitable for begin_dir requests, and had labelled no directory
33073 servers as suitable for uploading extra-info documents. [Bugfix
33076 o Minor bugfixes (dns):
33077 - Fix a crash when DNSPort is set more than once. (Patch from Robert
33078 Hogan.) [Bugfix on 0.2.0.2-alpha]
33079 - Add DNSPort connections to the global connection list, so that we
33080 can time them out correctly. (Bug found by Robert Hogan.) [Bugfix
33082 - Fix a dangling reference that could lead to a crash when DNSPort is
33083 changed or closed (Patch from Robert Hogan.) [Bugfix on
33086 o Minor bugfixes (controller):
33087 - Provide DNS expiry times in GMT, not in local time. For backward
33088 compatibility, ADDRMAP events only provide GMT expiry in an extended
33089 field. "GETINFO address-mappings" always does the right thing.
33090 - Use CRLF line endings properly in NS events.
33091 - Terminate multi-line control events properly. (Original patch
33092 from tup.) [Bugfix on 0.1.2.x-alpha]
33093 - Do not include spaces in SOURCE_ADDR fields in STREAM
33094 events. Resolves bug 472. [Bugfix on 0.2.0.x-alpha]
33097 Changes in version 0.1.2.15 - 2007-07-17
33098 Tor 0.1.2.15 fixes several crash bugs, fixes some anonymity-related
33099 problems, fixes compilation on BSD, and fixes a variety of other
33100 bugs. Everybody should upgrade.
33102 o Major bugfixes (compilation):
33103 - Fix compile on FreeBSD/NetBSD/OpenBSD. Oops.
33105 o Major bugfixes (crashes):
33106 - Try even harder not to dereference the first character after
33107 an mmap(). Reported by lodger.
33108 - Fix a crash bug in directory authorities when we re-number the
33109 routerlist while inserting a new router.
33110 - When the cached-routers file is an even multiple of the page size,
33111 don't run off the end and crash. (Fixes bug 455; based on idea
33113 - Fix eventdns.c behavior on Solaris: It is critical to include
33114 orconfig.h _before_ sys/types.h, so that we can get the expected
33115 definition of _FILE_OFFSET_BITS.
33117 o Major bugfixes (security):
33118 - Fix a possible buffer overrun when using BSD natd support. Bug
33120 - When sending destroy cells from a circuit's origin, don't include
33121 the reason for tearing down the circuit. The spec says we didn't,
33122 and now we actually don't. Reported by lodger.
33123 - Keep streamids from different exits on a circuit separate. This
33124 bug may have allowed other routers on a given circuit to inject
33125 cells into streams. Reported by lodger; fixes bug 446.
33126 - If there's a never-before-connected-to guard node in our list,
33127 never choose any guards past it. This way we don't expand our
33128 guard list unless we need to.
33130 o Minor bugfixes (guard nodes):
33131 - Weight guard selection by bandwidth, so that low-bandwidth nodes
33132 don't get overused as guards.
33134 o Minor bugfixes (directory):
33135 - Correctly count the number of authorities that recommend each
33136 version. Previously, we were under-counting by 1.
33137 - Fix a potential crash bug when we load many server descriptors at
33138 once and some of them make others of them obsolete. Fixes bug 458.
33140 o Minor bugfixes (hidden services):
33141 - Stop tearing down the whole circuit when the user asks for a
33142 connection to a port that the hidden service didn't configure.
33145 o Minor bugfixes (misc):
33146 - On Windows, we were preventing other processes from reading
33147 cached-routers while Tor was running. Reported by janbar.
33148 - Fix a possible (but very unlikely) bug in picking routers by
33149 bandwidth. Add a log message to confirm that it is in fact
33150 unlikely. Patch from lodger.
33151 - Backport a couple of memory leak fixes.
33152 - Backport miscellaneous cosmetic bugfixes.
33155 Changes in version 0.2.0.2-alpha - 2007-06-02
33156 o Major bugfixes on 0.2.0.1-alpha:
33157 - Fix an assertion failure related to servers without extra-info digests.
33158 Resolves bugs 441 and 442.
33160 o Minor features (directory):
33161 - Support "If-Modified-Since" when answering HTTP requests for
33162 directories, running-routers documents, and network-status documents.
33163 (There's no need to support it for router descriptors, since those
33164 are downloaded by descriptor digest.)
33166 o Minor build issues:
33167 - Clear up some MIPSPro compiler warnings.
33168 - When building from a tarball on a machine that happens to have SVK
33169 installed, report the micro-revision as whatever version existed
33170 in the tarball, not as "x".
33173 Changes in version 0.2.0.1-alpha - 2007-06-01
33174 This early development snapshot provides new features for people running
33175 Tor as both a client and a server (check out the new RelayBandwidth
33176 config options); lets Tor run as a DNS proxy; and generally moves us
33177 forward on a lot of fronts.
33179 o Major features, server usability:
33180 - New config options RelayBandwidthRate and RelayBandwidthBurst:
33181 a separate set of token buckets for relayed traffic. Right now
33182 relayed traffic is defined as answers to directory requests, and
33183 OR connections that don't have any local circuits on them.
33185 o Major features, client usability:
33186 - A client-side DNS proxy feature to replace the need for
33187 dns-proxy-tor: Just set "DNSPort 9999", and Tor will now listen
33188 for DNS requests on port 9999, use the Tor network to resolve them
33189 anonymously, and send the reply back like a regular DNS server.
33190 The code still only implements a subset of DNS.
33191 - Make PreferTunneledDirConns and TunnelDirConns work even when
33192 we have no cached directory info. This means Tor clients can now
33193 do all of their connections protected by TLS.
33195 o Major features, performance and efficiency:
33196 - Directory authorities accept and serve "extra info" documents for
33197 routers. These documents contain fields from router descriptors
33198 that aren't usually needed, and that use a lot of excess
33199 bandwidth. Once these fields are removed from router descriptors,
33200 the bandwidth savings should be about 60%. [Partially implements
33202 - Servers upload extra-info documents to any authority that accepts
33203 them. Authorities (and caches that have been configured to download
33204 extra-info documents) download them as needed. [Partially implements
33206 - Change the way that Tor buffers data that it is waiting to write.
33207 Instead of queueing data cells in an enormous ring buffer for each
33208 client->OR or OR->OR connection, we now queue cells on a separate
33209 queue for each circuit. This lets us use less slack memory, and
33210 will eventually let us be smarter about prioritizing different kinds
33212 - Use memory pools to allocate cells with better speed and memory
33213 efficiency, especially on platforms where malloc() is inefficient.
33214 - Stop reading on edge connections when their corresponding circuit
33215 buffers are full; start again as the circuits empty out.
33217 o Major features, other:
33218 - Add an HSAuthorityRecordStats option that hidden service authorities
33219 can use to track statistics of overall hidden service usage without
33220 logging information that would be very useful to an attacker.
33221 - Start work implementing multi-level keys for directory authorities:
33222 Add a standalone tool to generate key certificates. (Proposal 103.)
33225 - Directory authorities now call routers Stable if they have an
33226 uptime of at least 30 days, even if that's not the median uptime
33227 in the network. Implements proposal 107, suggested by Kevin Bauer
33230 o Minor fixes (resource management):
33231 - Count the number of open sockets separately from the number
33232 of active connection_t objects. This will let us avoid underusing
33233 our allocated connection limit.
33234 - We no longer use socket pairs to link an edge connection to an
33235 anonymous directory connection or a DirPort test connection.
33236 Instead, we track the link internally and transfer the data
33237 in-process. This saves two sockets per "linked" connection (at the
33238 client and at the server), and avoids the nasty Windows socketpair()
33240 - Keep unused 4k and 16k buffers on free lists, rather than wasting 8k
33241 for every single inactive connection_t. Free items from the
33242 4k/16k-buffer free lists when they haven't been used for a while.
33244 o Minor features (build):
33245 - Make autoconf search for libevent, openssl, and zlib consistently.
33246 - Update deprecated macros in configure.in.
33247 - When warning about missing headers, tell the user to let us
33248 know if the compile succeeds anyway, so we can downgrade the
33250 - Include the current subversion revision as part of the version
33251 string: either fetch it directly if we're in an SVN checkout, do
33252 some magic to guess it if we're in an SVK checkout, or use
33253 the last-detected version if we're building from a .tar.gz.
33254 Use this version consistently in log messages.
33256 o Minor features (logging):
33257 - Always prepend "Bug: " to any log message about a bug.
33258 - Put a platform string (e.g. "Linux i686") in the startup log
33259 message, so when people paste just their logs, we know if it's
33260 OpenBSD or Windows or what.
33261 - When logging memory usage, break down memory used in buffers by
33264 o Minor features (directory system):
33265 - New config option V2AuthoritativeDirectory that all directory
33266 authorities should set. This will let future authorities choose
33267 not to serve V2 directory information.
33268 - Directory authorities allow multiple router descriptors and/or extra
33269 info documents to be uploaded in a single go. This will make
33270 implementing proposal 104 simpler.
33272 o Minor features (controller):
33273 - Add a new config option __DisablePredictedCircuits designed for
33274 use by the controller, when we don't want Tor to build any circuits
33276 - Let the controller specify HOP=%d as an argument to ATTACHSTREAM,
33277 so we can exit from the middle of the circuit.
33278 - Implement "getinfo status/circuit-established".
33279 - Implement "getinfo status/version/..." so a controller can tell
33280 whether the current version is recommended, and whether any versions
33281 are good, and how many authorities agree. (Patch from shibz.)
33283 o Minor features (hidden services):
33284 - Allow multiple HiddenServicePort directives with the same virtual
33285 port; when they occur, the user is sent round-robin to one
33286 of the target ports chosen at random. Partially fixes bug 393 by
33287 adding limited ad-hoc round-robining.
33289 o Minor features (other):
33291 - Add a new AutomapHostsOnResolve option: when it is enabled, any
33292 resolve request for hosts matching a given pattern causes Tor to
33293 generate an internal virtual address mapping for that host. This
33294 allows DNSPort to work sensibly with hidden service users. By
33295 default, .exit and .onion addresses are remapped; the list of
33296 patterns can be reconfigured with AutomapHostsSuffixes.
33297 - Add an "-F" option to tor-resolve to force a resolve for a .onion
33298 address. Thanks to the AutomapHostsOnResolve option, this is no
33299 longer a completely silly thing to do.
33300 - If Tor is invoked from something that isn't a shell (e.g. Vidalia),
33301 now we expand "-f ~/.tor/torrc" correctly. Suggested by Matt Edman.
33302 - Treat "2gb" when given in torrc for a bandwidth as meaning 2gb,
33303 minus 1 byte: the actual maximum declared bandwidth.
33305 o Removed features:
33306 - Removed support for the old binary "version 0" controller protocol.
33307 This has been deprecated since 0.1.1, and warnings have been issued
33308 since 0.1.2. When we encounter a v0 control message, we now send
33309 back an error and close the connection.
33310 - Remove the old "dns worker" server DNS code: it hasn't been default
33311 since 0.1.2.2-alpha, and all the servers seem to be using the new
33314 o Minor bugfixes (portability):
33315 - Even though Windows is equally happy with / and \ as path separators,
33316 try to use \ consistently on Windows and / consistently on Unix: it
33317 makes the log messages nicer.
33318 - Correctly report platform name on Windows 95 OSR2 and Windows 98 SE.
33319 - Read resolv.conf files correctly on platforms where read() returns
33320 partial results on small file reads.
33322 o Minor bugfixes (directory):
33323 - Correctly enforce that elements of directory objects do not appear
33324 more often than they are allowed to appear.
33325 - When we are reporting the DirServer line we just parsed, we were
33326 logging the second stanza of the key fingerprint, not the first.
33328 o Minor bugfixes (logging):
33329 - When we hit an EOF on a log (probably because we're shutting down),
33330 don't try to remove the log from the list: just mark it as
33331 unusable. (Bulletproofs against bug 222.)
33333 o Minor bugfixes (other):
33334 - In the exitlist script, only consider the most recently published
33335 server descriptor for each server. Also, when the user requests
33336 a list of servers that _reject_ connections to a given address,
33337 explicitly exclude the IPs that also have servers that accept
33338 connections to that address. (Resolves bug 405.)
33339 - Stop allowing hibernating servers to be "stable" or "fast".
33340 - On Windows, we were preventing other processes from reading
33341 cached-routers while Tor was running. (Reported by janbar)
33342 - Make the NodeFamilies config option work. (Reported by
33343 lodger -- it has never actually worked, even though we added it
33345 - Check return values from pthread_mutex functions.
33346 - Don't save non-general-purpose router descriptors to the disk cache,
33347 because we have no way of remembering what their purpose was when
33349 - Add even more asserts to hunt down bug 417.
33350 - Build without verbose warnings even on (not-yet-released) gcc 4.2.
33351 - Fix a possible (but very unlikely) bug in picking routers by bandwidth.
33352 Add a log message to confirm that it is in fact unlikely.
33354 o Minor bugfixes (controller):
33355 - Make 'getinfo fingerprint' return a 551 error if we're not a
33356 server, so we match what the control spec claims we do. Reported
33358 - Fix a typo in an error message when extendcircuit fails that
33359 caused us to not follow the \r\n-based delimiter protocol. Reported
33362 o Code simplifications and refactoring:
33363 - Stop passing around circuit_t and crypt_path_t pointers that are
33364 implicit in other procedure arguments.
33365 - Drop the old code to choke directory connections when the
33366 corresponding OR connections got full: thanks to the cell queue
33367 feature, OR conns don't get full any more.
33368 - Make dns_resolve() handle attaching connections to circuits
33369 properly, so the caller doesn't have to.
33370 - Rename wants_to_read and wants_to_write to read/write_blocked_on_bw.
33371 - Keep the connection array as a dynamic smartlist_t, rather than as
33372 a fixed-sized array. This is important, as the number of connections
33373 is becoming increasingly decoupled from the number of sockets.
33376 Changes in version 0.1.2.14 - 2007-05-25
33377 Tor 0.1.2.14 changes the addresses of two directory authorities (this
33378 change especially affects those who serve or use hidden services),
33379 and fixes several other crash- and security-related bugs.
33381 o Directory authority changes:
33382 - Two directory authorities (moria1 and moria2) just moved to new
33383 IP addresses. This change will particularly affect those who serve
33384 or use hidden services.
33386 o Major bugfixes (crashes):
33387 - If a directory server runs out of space in the connection table
33388 as it's processing a begin_dir request, it will free the exit stream
33389 but leave it attached to the circuit, leading to unpredictable
33390 behavior. (Reported by seeess, fixes bug 425.)
33391 - Fix a bug in dirserv_remove_invalid() that would cause authorities
33392 to corrupt memory under some really unlikely scenarios.
33393 - Tighten router parsing rules. (Bugs reported by Benedikt Boss.)
33394 - Avoid segfaults when reading from mmaped descriptor file. (Reported
33397 o Major bugfixes (security):
33398 - When choosing an entry guard for a circuit, avoid using guards
33399 that are in the same family as the chosen exit -- not just guards
33400 that are exactly the chosen exit. (Reported by lodger.)
33402 o Major bugfixes (resource management):
33403 - If a directory authority is down, skip it when deciding where to get
33404 networkstatus objects or descriptors. Otherwise we keep asking
33405 every 10 seconds forever. Fixes bug 384.
33406 - Count it as a failure if we fetch a valid network-status but we
33407 don't want to keep it. Otherwise we'll keep fetching it and keep
33408 not wanting to keep it. Fixes part of bug 422.
33409 - If all of our dirservers have given us bad or no networkstatuses
33410 lately, then stop hammering them once per minute even when we
33411 think they're failed. Fixes another part of bug 422.
33414 - Actually set the purpose correctly for descriptors inserted with
33415 purpose=controller.
33416 - When we have k non-v2 authorities in our DirServer config,
33417 we ignored the last k authorities in the list when updating our
33419 - Correctly back-off from requesting router descriptors that we are
33420 having a hard time downloading.
33421 - Read resolv.conf files correctly on platforms where read() returns
33422 partial results on small file reads.
33423 - Don't rebuild the entire router store every time we get 32K of
33424 routers: rebuild it when the journal gets very large, or when
33425 the gaps in the store get very large.
33428 - When routers publish SVN revisions in their router descriptors,
33429 authorities now include those versions correctly in networkstatus
33431 - Warn when using a version of libevent before 1.3b to run a server on
33432 OSX or BSD: these versions interact badly with userspace threads.
33435 Changes in version 0.1.2.13 - 2007-04-24
33436 This release features some major anonymity fixes, such as safer path
33437 selection; better client performance; faster bootstrapping, better
33438 address detection, and better DNS support for servers; write limiting as
33439 well as read limiting to make servers easier to run; and a huge pile of
33440 other features and bug fixes. The bundles also ship with Vidalia 0.0.11.
33442 Tor 0.1.2.13 is released in memory of Rob Levin (1955-2006), aka lilo
33443 of the Freenode IRC network, remembering his patience and vision for
33444 free speech on the Internet.
33447 - Fix a memory leak when we ask for "all" networkstatuses and we
33448 get one we don't recognize.
33449 - Add more asserts to hunt down bug 417.
33450 - Disable kqueue on OS X 10.3 and earlier, to fix bug 371.
33453 Changes in version 0.1.2.12-rc - 2007-03-16
33455 - Fix an infinite loop introduced in 0.1.2.7-alpha when we serve
33456 directory information requested inside Tor connections (i.e. via
33457 begin_dir cells). It only triggered when the same connection was
33458 serving other data at the same time. Reported by seeess.
33461 - When creating a circuit via the controller, send a 'launched'
33462 event when we're done, so we follow the spec better.
33465 Changes in version 0.1.2.11-rc - 2007-03-15
33466 o Minor bugfixes (controller), reported by daejees:
33467 - Correct the control spec to match how the code actually responds
33468 to 'getinfo addr-mappings/*'.
33469 - The control spec described a GUARDS event, but the code
33470 implemented a GUARD event. Standardize on GUARD, but let people
33471 ask for GUARDS too.
33474 Changes in version 0.1.2.10-rc - 2007-03-07
33475 o Major bugfixes (Windows):
33476 - Do not load the NT services library functions (which may not exist)
33477 just to detect if we're a service trying to shut down. Now we run
33478 on Win98 and friends again.
33480 o Minor bugfixes (other):
33481 - Clarify a couple of log messages.
33482 - Fix a misleading socks5 error number.
33485 Changes in version 0.1.2.9-rc - 2007-03-02
33486 o Major bugfixes (Windows):
33487 - On MinGW, use "%I64u" to printf/scanf 64-bit integers, instead
33488 of the usual GCC "%llu". This prevents a bug when saving 64-bit
33489 int configuration values: the high-order 32 bits would get
33490 truncated. In particular, we were being bitten by the default
33491 MaxAdvertisedBandwidth of 128 TB turning into 0. (Fixes bug 400
33492 and maybe also bug 397.)
33494 o Minor bugfixes (performance):
33495 - Use OpenSSL's AES implementation on platforms where it's faster.
33496 This could save us as much as 10% CPU usage.
33498 o Minor bugfixes (server):
33499 - Do not rotate onion key immediately after setting it for the first
33502 o Minor bugfixes (directory authorities):
33503 - Stop calling servers that have been hibernating for a long time
33504 "stable". Also, stop letting hibernating or obsolete servers affect
33505 uptime and bandwidth cutoffs.
33506 - Stop listing hibernating servers in the v1 directory.
33508 o Minor bugfixes (hidden services):
33509 - Upload hidden service descriptors slightly less often, to reduce
33510 load on authorities.
33512 o Minor bugfixes (other):
33513 - Fix an assert that could trigger if a controller quickly set then
33514 cleared EntryNodes. Bug found by Udo van den Heuvel.
33515 - On architectures where sizeof(int)>4, still clamp declarable bandwidth
33517 - Fix a potential race condition in the rpm installer. Found by
33519 - Try to fix eventdns warnings once and for all: do not treat a dns rcode
33520 of 2 as indicating that the server is completely bad; it sometimes
33521 means that the server is just bad for the request in question. (may fix
33522 the last of bug 326.)
33523 - Disable encrypted directory connections when we don't have a server
33524 descriptor for the destination. We'll get this working again in
33528 Changes in version 0.1.2.8-beta - 2007-02-26
33529 o Major bugfixes (crashes):
33530 - Stop crashing when the controller asks us to resetconf more than
33531 one config option at once. (Vidalia 0.0.11 does this.)
33532 - Fix a crash that happened on Win98 when we're given command-line
33533 arguments: don't try to load NT service functions from advapi32.dll
33534 except when we need them. (Bug introduced in 0.1.2.7-alpha;
33536 - Fix a longstanding obscure crash bug that could occur when
33537 we run out of DNS worker processes. (Resolves bug 390.)
33539 o Major bugfixes (hidden services):
33540 - Correctly detect whether hidden service descriptor downloads are
33541 in-progress. (Suggested by Karsten Loesing; fixes bug 399.)
33543 o Major bugfixes (accounting):
33544 - When we start during an accounting interval before it's time to wake
33545 up, remember to wake up at the correct time. (May fix bug 342.)
33547 o Minor bugfixes (controller):
33548 - Give the controller END_STREAM_REASON_DESTROY events _before_ we
33549 clear the corresponding on_circuit variable, and remember later
33550 that we don't need to send a redundant CLOSED event. Resolves part
33552 - Report events where a resolve succeeded or where we got a socks
33553 protocol error correctly, rather than calling both of them
33555 - Change reported stream target addresses to IP consistently when
33556 we finally get the IP from an exit node.
33557 - Send log messages to the controller even if they happen to be very
33560 o Minor bugfixes (other):
33561 - Display correct results when reporting which versions are
33562 recommended, and how recommended they are. (Resolves bug 383.)
33563 - Improve our estimates for directory bandwidth to be less random:
33564 guess that an unrecognized directory will have the average bandwidth
33565 from all known directories, not that it will have the average
33566 bandwidth from those directories earlier than it on the list.
33567 - If we start a server with ClientOnly 1, then set ClientOnly to 0
33568 and hup, stop triggering an assert based on an empty onion_key.
33569 - On platforms with no working mmap() equivalent, don't warn the
33570 user when cached-routers doesn't exist.
33571 - Warn the user when mmap() [or its equivalent] fails for some reason
33572 other than file-not-found.
33573 - Don't warn the user when cached-routers.new doesn't exist: that's
33574 perfectly fine when starting up for the first time.
33575 - When EntryNodes are configured, rebuild the guard list to contain,
33576 in order: the EntryNodes that were guards before; the rest of the
33577 EntryNodes; the nodes that were guards before.
33578 - Mask out all signals in sub-threads; only the libevent signal
33579 handler should be processing them. This should prevent some crashes
33580 on some machines using pthreads. (Patch from coderman.)
33581 - Fix switched arguments on memset in the implementation of
33582 tor_munmap() for systems with no mmap() call.
33583 - When Tor receives a router descriptor that it asked for, but
33584 no longer wants (because it has received fresh networkstatuses
33585 in the meantime), do not warn the user. Cache the descriptor if
33586 we're a cache; drop it if we aren't.
33587 - Make earlier entry guards _really_ get retried when the network
33589 - On a malformed DNS reply, always give an error to the corresponding
33591 - Build with recent libevents on platforms that do not define the
33592 nonstandard types "u_int8_t" and friends.
33594 o Minor features (controller):
33595 - Warn the user when an application uses the obsolete binary v0
33596 control protocol. We're planning to remove support for it during
33597 the next development series, so it's good to give people some
33599 - Add STREAM_BW events to report per-entry-stream bandwidth
33600 use. (Patch from Robert Hogan.)
33601 - Rate-limit SIGNEWNYM signals in response to controllers that
33602 impolitely generate them for every single stream. (Patch from
33603 mwenge; closes bug 394.)
33604 - Make REMAP stream events have a SOURCE (cache or exit), and
33605 make them generated in every case where we get a successful
33606 connected or resolved cell.
33608 o Minor bugfixes (performance):
33609 - Call router_have_min_dir_info half as often. (This is showing up in
33610 some profiles, but not others.)
33611 - When using GCC, make log_debug never get called at all, and its
33612 arguments never get evaluated, when no debug logs are configured.
33613 (This is showing up in some profiles, but not others.)
33616 - Remove some never-implemented options. Mark PathlenCoinWeight as
33618 - Implement proposal 106: Stop requiring clients to have well-formed
33619 certificates; stop checking nicknames in certificates. (Clients
33620 have certificates so that they can look like Tor servers, but in
33621 the future we might want to allow them to look like regular TLS
33622 clients instead. Nicknames in certificates serve no purpose other
33623 than making our protocol easier to recognize on the wire.)
33624 - Revise messages on handshake failure again to be even more clear about
33625 which are incoming connections and which are outgoing.
33626 - Discard any v1 directory info that's over 1 month old (for
33627 directories) or over 1 week old (for running-routers lists).
33628 - Do not warn when individual nodes in the configuration's EntryNodes,
33629 ExitNodes, etc are down: warn only when all possible nodes
33630 are down. (Fixes bug 348.)
33631 - Always remove expired routers and networkstatus docs before checking
33632 whether we have enough information to build circuits. (Fixes
33634 - Put a lower-bound on MaxAdvertisedBandwidth.
33637 Changes in version 0.1.2.7-alpha - 2007-02-06
33638 o Major bugfixes (rate limiting):
33639 - Servers decline directory requests much more aggressively when
33640 they're low on bandwidth. Otherwise they end up queueing more and
33641 more directory responses, which can't be good for latency.
33642 - But never refuse directory requests from local addresses.
33643 - Fix a memory leak when sending a 503 response for a networkstatus
33645 - Be willing to read or write on local connections (e.g. controller
33646 connections) even when the global rate limiting buckets are empty.
33647 - If our system clock jumps back in time, don't publish a negative
33648 uptime in the descriptor. Also, don't let the global rate limiting
33649 buckets go absurdly negative.
33650 - Flush local controller connection buffers periodically as we're
33651 writing to them, so we avoid queueing 4+ megabytes of data before
33654 o Major bugfixes (NT services):
33655 - Install as NT_AUTHORITY\LocalService rather than as SYSTEM; add a
33656 command-line flag so that admins can override the default by saying
33657 "tor --service install --user "SomeUser"". This will not affect
33658 existing installed services. Also, warn the user that the service
33659 will look for its configuration file in the service user's
33660 %appdata% directory. (We can't do the 'hardwire the user's appdata
33661 directory' trick any more, since we may not have read access to that
33664 o Major bugfixes (other):
33665 - Previously, we would cache up to 16 old networkstatus documents
33666 indefinitely, if they came from nontrusted authorities. Now we
33667 discard them if they are more than 10 days old.
33668 - Fix a crash bug in the presence of DNS hijacking (reported by Andrew
33670 - Detect and reject malformed DNS responses containing circular
33672 - If exits are rare enough that we're not marking exits as guards,
33673 ignore exit bandwidth when we're deciding the required bandwidth
33675 - When we're handling a directory connection tunneled over Tor,
33676 don't fill up internal memory buffers with all the data we want
33677 to tunnel; instead, only add it if the OR connection that will
33678 eventually receive it has some room for it. (This can lead to
33679 slowdowns in tunneled dir connections; a better solution will have
33680 to wait for 0.2.0.)
33682 o Minor bugfixes (dns):
33683 - Add some defensive programming to eventdns.c in an attempt to catch
33684 possible memory-stomping bugs.
33685 - Detect and reject DNS replies containing IPv4 or IPv6 records with
33686 an incorrect number of bytes. (Previously, we would ignore the
33688 - Fix as-yet-unused reverse IPv6 lookup code so it sends nybbles
33689 in the correct order, and doesn't crash.
33690 - Free memory held in recently-completed DNS lookup attempts on exit.
33691 This was not a memory leak, but may have been hiding memory leaks.
33692 - Handle TTL values correctly on reverse DNS lookups.
33693 - Treat failure to parse resolv.conf as an error.
33695 o Minor bugfixes (other):
33696 - Fix crash with "tor --list-fingerprint" (reported by seeess).
33697 - When computing clock skew from directory HTTP headers, consider what
33698 time it was when we finished asking for the directory, not what
33700 - Expire socks connections if they spend too long waiting for the
33701 handshake to finish. Previously we would let them sit around for
33702 days, if the connecting application didn't close them either.
33703 - And if the socks handshake hasn't started, don't send a
33704 "DNS resolve socks failed" handshake reply; just close it.
33705 - Stop using C functions that OpenBSD's linker doesn't like.
33706 - Don't launch requests for descriptors unless we have networkstatuses
33707 from at least half of the authorities. This delays the first
33708 download slightly under pathological circumstances, but can prevent
33709 us from downloading a bunch of descriptors we don't need.
33710 - Do not log IPs with TLS failures for incoming TLS
33711 connections. (Fixes bug 382.)
33712 - If the user asks to use invalid exit nodes, be willing to use
33714 - Stop using the reserved ac_cv namespace in our configure script.
33715 - Call stat() slightly less often; use fstat() when possible.
33716 - Refactor the way we handle pending circuits when an OR connection
33717 completes or fails, in an attempt to fix a rare crash bug.
33718 - Only rewrite a conn's address based on X-Forwarded-For: headers
33719 if it's a parseable public IP address; and stop adding extra quotes
33720 to the resulting address.
33723 - Weight directory requests by advertised bandwidth. Now we can
33724 let servers enable write limiting but still allow most clients to
33725 succeed at their directory requests. (We still ignore weights when
33726 choosing a directory authority; I hope this is a feature.)
33729 - Create a new file ReleaseNotes which was the old ChangeLog. The
33730 new ChangeLog file now includes the summaries for all development
33732 - Check for addresses with invalid characters at the exit as well
33733 as at the client, and warn less verbosely when they fail. You can
33734 override this by setting ServerDNSAllowNonRFC953Addresses to 1.
33735 - Adapt a patch from goodell to let the contrib/exitlist script
33736 take arguments rather than require direct editing.
33737 - Inform the server operator when we decide not to advertise a
33738 DirPort due to AccountingMax enabled or a low BandwidthRate. It
33739 was confusing Zax, so now we're hopefully more helpful.
33740 - Bring us one step closer to being able to establish an encrypted
33741 directory tunnel without knowing a descriptor first. Still not
33742 ready yet. As part of the change, now assume we can use a
33743 create_fast cell if we don't know anything about a router.
33744 - Allow exit nodes to use nameservers running on ports other than 53.
33745 - Servers now cache reverse DNS replies.
33746 - Add an --ignore-missing-torrc command-line option so that we can
33747 get the "use sensible defaults if the configuration file doesn't
33748 exist" behavior even when specifying a torrc location on the command
33751 o Minor features (controller):
33752 - Track reasons for OR connection failure; make these reasons
33753 available via the controller interface. (Patch from Mike Perry.)
33754 - Add a SOCKS_BAD_HOSTNAME client status event so controllers
33755 can learn when clients are sending malformed hostnames to Tor.
33756 - Clean up documentation for controller status events.
33757 - Add a REMAP status to stream events to note that a stream's
33758 address has changed because of a cached address or a MapAddress
33762 Changes in version 0.1.2.6-alpha - 2007-01-09
33764 - Fix an assert error introduced in 0.1.2.5-alpha: if a single TLS
33765 connection handles more than 4 gigs in either direction, we crash.
33766 - Fix an assert error introduced in 0.1.2.5-alpha: if we're an
33767 advertised exit node, somebody might try to exit from us when
33768 we're bootstrapping and before we've built our descriptor yet.
33769 Refuse the connection rather than crashing.
33772 - Warn if we (as a server) find that we've resolved an address that we
33773 weren't planning to resolve.
33774 - Warn that using select() on any libevent version before 1.1 will be
33775 unnecessarily slow (even for select()).
33776 - Flush ERR-level controller status events just like we currently
33777 flush ERR-level log events, so that a Tor shutdown doesn't prevent
33778 the controller from learning about current events.
33780 o Minor features (more controller status events):
33781 - Implement EXTERNAL_ADDRESS server status event so controllers can
33782 learn when our address changes.
33783 - Implement BAD_SERVER_DESCRIPTOR server status event so controllers
33784 can learn when directories reject our descriptor.
33785 - Implement SOCKS_UNKNOWN_PROTOCOL client status event so controllers
33786 can learn when a client application is speaking a non-socks protocol
33788 - Implement DANGEROUS_SOCKS client status event so controllers
33789 can learn when a client application is leaking DNS addresses.
33790 - Implement BUG general status event so controllers can learn when
33791 Tor is unhappy about its internal invariants.
33792 - Implement CLOCK_SKEW general status event so controllers can learn
33793 when Tor thinks the system clock is set incorrectly.
33794 - Implement GOOD_SERVER_DESCRIPTOR and ACCEPTED_SERVER_DESCRIPTOR
33795 server status events so controllers can learn when their descriptors
33796 are accepted by a directory.
33797 - Implement CHECKING_REACHABILITY and REACHABILITY_{SUCCEEDED|FAILED}
33798 server status events so controllers can learn about Tor's progress in
33799 deciding whether it's reachable from the outside.
33800 - Implement BAD_LIBEVENT general status event so controllers can learn
33801 when we have a version/method combination in libevent that needs to
33803 - Implement NAMESERVER_STATUS, NAMESERVER_ALL_DOWN, DNS_HIJACKED,
33804 and DNS_USELESS server status events so controllers can learn
33805 about changes to DNS server status.
33807 o Minor features (directory):
33808 - Authorities no longer recommend exits as guards if this would shift
33809 too much load to the exit nodes.
33812 Changes in version 0.1.2.5-alpha - 2007-01-06
33814 - Enable write limiting as well as read limiting. Now we sacrifice
33815 capacity if we're pushing out lots of directory traffic, rather
33816 than overrunning the user's intended bandwidth limits.
33817 - Include TLS overhead when counting bandwidth usage; previously, we
33818 would count only the bytes sent over TLS, but not the bytes used
33820 - Support running the Tor service with a torrc not in the same
33821 directory as tor.exe and default to using the torrc located in
33822 the %appdata%\Tor\ of the user who installed the service. Patch
33824 - Servers now check for the case when common DNS requests are going to
33825 wildcarded addresses (i.e. all getting the same answer), and change
33826 their exit policy to reject *:* if it's happening.
33827 - Implement BEGIN_DIR cells, so we can connect to the directory
33828 server via TLS to do encrypted directory requests rather than
33829 plaintext. Enable via the TunnelDirConns and PreferTunneledDirConns
33830 config options if you like.
33832 o Minor features (config and docs):
33833 - Start using the state file to store bandwidth accounting data:
33834 the bw_accounting file is now obsolete. We'll keep generating it
33835 for a while for people who are still using 0.1.2.4-alpha.
33836 - Try to batch changes to the state file so that we do as few
33837 disk writes as possible while still storing important things in
33839 - The state file and the bw_accounting file get saved less often when
33840 the AvoidDiskWrites config option is set.
33841 - Make PIDFile work on Windows (untested).
33842 - Add internal descriptions for a bunch of configuration options:
33843 accessible via controller interface and in comments in saved
33845 - Reject *:563 (NNTPS) in the default exit policy. We already reject
33846 NNTP by default, so this seems like a sensible addition.
33847 - Clients now reject hostnames with invalid characters. This should
33848 avoid some inadvertent info leaks. Add an option
33849 AllowNonRFC953Hostnames to disable this behavior, in case somebody
33850 is running a private network with hosts called @, !, and #.
33851 - Add a maintainer script to tell us which options are missing
33852 documentation: "make check-docs".
33853 - Add a new address-spec.txt document to describe our special-case
33854 addresses: .exit, .onion, and .noconnnect.
33856 o Minor features (DNS):
33857 - Ongoing work on eventdns infrastructure: now it has dns server
33858 and ipv6 support. One day Tor will make use of it.
33859 - Add client-side caching for reverse DNS lookups.
33860 - Add support to tor-resolve tool for reverse lookups and SOCKS5.
33861 - When we change nameservers or IP addresses, reset and re-launch
33862 our tests for DNS hijacking.
33864 o Minor features (directory):
33865 - Authorities now specify server versions in networkstatus. This adds
33866 about 2% to the size of compressed networkstatus docs, and allows
33867 clients to tell which servers support BEGIN_DIR and which don't.
33868 The implementation is forward-compatible with a proposed future
33869 protocol version scheme not tied to Tor versions.
33870 - DirServer configuration lines now have an orport= option so
33871 clients can open encrypted tunnels to the authorities without
33872 having downloaded their descriptors yet. Enabled for moria1,
33873 moria2, tor26, and lefkada now in the default configuration.
33874 - Directory servers are more willing to send a 503 "busy" if they
33875 are near their write limit, especially for v1 directory requests.
33876 Now they can use their limited bandwidth for actual Tor traffic.
33877 - Clients track responses with status 503 from dirservers. After a
33878 dirserver has given us a 503, we try not to use it until an hour has
33879 gone by, or until we have no dirservers that haven't given us a 503.
33880 - When we get a 503 from a directory, and we're not a server, we don't
33881 count the failure against the total number of failures allowed
33882 for the thing we're trying to download.
33883 - Report X-Your-Address-Is correctly from tunneled directory
33884 connections; don't report X-Your-Address-Is when it's an internal
33885 address; and never believe reported remote addresses when they're
33887 - Protect against an unlikely DoS attack on directory servers.
33888 - Add a BadDirectory flag to network status docs so that authorities
33889 can (eventually) tell clients about caches they believe to be
33892 o Minor features (controller):
33893 - Have GETINFO dir/status/* work on hosts with DirPort disabled.
33894 - Reimplement GETINFO so that info/names stays in sync with the
33896 - Implement "GETINFO fingerprint".
33897 - Implement "SETEVENTS GUARD" so controllers can get updates on
33898 entry guard status as it changes.
33900 o Minor features (clean up obsolete pieces):
33901 - Remove some options that have been deprecated since at least
33902 0.1.0.x: AccountingMaxKB, LogFile, DebugLogFile, LogLevel, and
33903 SysLog. Use AccountingMax instead of AccountingMaxKB, and use Log
33904 to set log options.
33905 - We no longer look for identity and onion keys in "identity.key" and
33906 "onion.key" -- these were replaced by secret_id_key and
33907 secret_onion_key in 0.0.8pre1.
33908 - We no longer require unrecognized directory entries to be
33911 o Major bugfixes (security):
33912 - Stop sending the HttpProxyAuthenticator string to directory
33913 servers when directory connections are tunnelled through Tor.
33914 - Clients no longer store bandwidth history in the state file.
33915 - Do not log introduction points for hidden services if SafeLogging
33917 - When generating bandwidth history, round down to the nearest
33918 1k. When storing accounting data, round up to the nearest 1k.
33919 - When we're running as a server, remember when we last rotated onion
33920 keys, so that we will rotate keys once they're a week old even if
33921 we never stay up for a week ourselves.
33923 o Major bugfixes (other):
33924 - Fix a longstanding bug in eventdns that prevented the count of
33925 timed-out resolves from ever being reset. This bug caused us to
33926 give up on a nameserver the third time it timed out, and try it
33927 10 seconds later... and to give up on it every time it timed out
33929 - Take out the '5 second' timeout from the connection retry
33930 schedule. Now the first connect attempt will wait a full 10
33931 seconds before switching to a new circuit. Perhaps this will help
33932 a lot. Based on observations from Mike Perry.
33933 - Fix a bug on the Windows implementation of tor_mmap_file() that
33934 would prevent the cached-routers file from ever loading. Reported
33938 - Fix an assert failure when a directory authority sets
33939 AuthDirRejectUnlisted and then receives a descriptor from an
33940 unlisted router. Reported by seeess.
33941 - Avoid a double-free when parsing malformed DirServer lines.
33942 - Fix a bug when a BSD-style PF socket is first used. Patch from
33944 - Fix a bug in 0.1.2.2-alpha that prevented clients from asking
33945 to resolve an address at a given exit node even when they ask for
33947 - Servers no longer ever list themselves in their "family" line,
33948 even if configured to do so. This makes it easier to configure
33949 family lists conveniently.
33950 - When running as a server, don't fall back to 127.0.0.1 when no
33951 nameservers are configured in /etc/resolv.conf; instead, make the
33952 user fix resolv.conf or specify nameservers explicitly. (Resolves
33954 - Stop accepting certain malformed ports in configured exit policies.
33955 - Don't re-write the fingerprint file every restart, unless it has
33957 - Stop warning when a single nameserver fails: only warn when _all_ of
33958 our nameservers have failed. Also, when we only have one nameserver,
33959 raise the threshold for deciding that the nameserver is dead.
33960 - Directory authorities now only decide that routers are reachable
33961 if their identity keys are as expected.
33962 - When the user uses bad syntax in the Log config line, stop
33963 suggesting other bad syntax as a replacement.
33964 - Correctly detect ipv6 DNS capability on OpenBSD.
33966 o Minor bugfixes (controller):
33967 - Report the circuit number correctly in STREAM CLOSED events. Bug
33968 reported by Mike Perry.
33969 - Do not report bizarre values for results of accounting GETINFOs
33970 when the last second's write or read exceeds the allotted bandwidth.
33971 - Report "unrecognized key" rather than an empty string when the
33972 controller tries to fetch a networkstatus that doesn't exist.
33975 Changes in version 0.1.1.26 - 2006-12-14
33976 o Security bugfixes:
33977 - Stop sending the HttpProxyAuthenticator string to directory
33978 servers when directory connections are tunnelled through Tor.
33979 - Clients no longer store bandwidth history in the state file.
33980 - Do not log introduction points for hidden services if SafeLogging
33984 - Fix an assert failure when a directory authority sets
33985 AuthDirRejectUnlisted and then receives a descriptor from an
33986 unlisted router (reported by seeess).
33989 Changes in version 0.1.2.4-alpha - 2006-12-03
33991 - Add support for using natd; this allows FreeBSDs earlier than
33992 5.1.2 to have ipfw send connections through Tor without using
33993 SOCKS. (Patch from Zajcev Evgeny with tweaks from tup.)
33996 - Make all connections to addresses of the form ".noconnect"
33997 immediately get closed. This lets application/controller combos
33998 successfully test whether they're talking to the same Tor by
33999 watching for STREAM events.
34000 - Make cross.sh cross-compilation script work even when autogen.sh
34001 hasn't been run. (Patch from Michael Mohr.)
34002 - Statistics dumped by -USR2 now include a breakdown of public key
34003 operations, for profiling.
34006 - Fix a major leak when directory authorities parse their
34007 approved-routers list, a minor memory leak when we fail to pick
34008 an exit node, and a few rare leaks on errors.
34009 - Handle TransPort connections even when the server sends data before
34010 the client sends data. Previously, the connection would just hang
34011 until the client sent data. (Patch from tup based on patch from
34013 - Avoid assert failure when our cached-routers file is empty on
34017 - Don't log spurious warnings when we see a circuit close reason we
34018 don't recognize; it's probably just from a newer version of Tor.
34019 - Have directory authorities allow larger amounts of drift in uptime
34020 without replacing the server descriptor: previously, a server that
34021 restarted every 30 minutes could have 48 "interesting" descriptors
34023 - Start linking to the Tor specification and Tor reference manual
34024 correctly in the Windows installer.
34025 - Add Vidalia to the OS X uninstaller script, so when we uninstall
34026 Tor/Privoxy we also uninstall Vidalia.
34027 - Resume building on Irix64, and fix a lot of warnings from its
34028 MIPSpro C compiler.
34029 - Don't corrupt last_guessed_ip in router_new_address_suggestion()
34030 when we're running as a client.
34033 Changes in version 0.1.1.25 - 2006-11-04
34035 - When a client asks us to resolve (rather than connect to)
34036 an address, and we have a cached answer, give them the cached
34037 answer. Previously, we would give them no answer at all.
34038 - We were building exactly the wrong circuits when we predict
34039 hidden service requirements, meaning Tor would have to build all
34040 its circuits on demand.
34041 - If none of our live entry guards have a high uptime, but we
34042 require a guard with a high uptime, try adding a new guard before
34043 we give up on the requirement. This patch should make long-lived
34044 connections more stable on average.
34045 - When testing reachability of our DirPort, don't launch new
34046 tests when there's already one in progress -- unreachable
34047 servers were stacking up dozens of testing streams.
34049 o Security bugfixes:
34050 - When the user sends a NEWNYM signal, clear the client-side DNS
34051 cache too. Otherwise we continue to act on previous information.
34054 - Avoid a memory corruption bug when creating a hash table for
34056 - Avoid possibility of controller-triggered crash when misusing
34057 certain commands from a v0 controller on platforms that do not
34058 handle printf("%s",NULL) gracefully.
34059 - Avoid infinite loop on unexpected controller input.
34060 - Don't log spurious warnings when we see a circuit close reason we
34061 don't recognize; it's probably just from a newer version of Tor.
34062 - Add Vidalia to the OS X uninstaller script, so when we uninstall
34063 Tor/Privoxy we also uninstall Vidalia.
34066 Changes in version 0.1.2.3-alpha - 2006-10-29
34068 - Prepare for servers to publish descriptors less often: never
34069 discard a descriptor simply for being too old until either it is
34070 recommended by no authorities, or until we get a better one for
34071 the same router. Make caches consider retaining old recommended
34072 routers for even longer.
34073 - If most authorities set a BadExit flag for a server, clients
34074 don't think of it as a general-purpose exit. Clients only consider
34075 authorities that advertise themselves as listing bad exits.
34076 - Directory servers now provide 'Pragma: no-cache' and 'Expires'
34077 headers for content, so that we can work better in the presence of
34078 caching HTTP proxies.
34079 - Allow authorities to list nodes as bad exits by fingerprint or by
34082 o Minor features, controller:
34083 - Add a REASON field to CIRC events; for backward compatibility, this
34084 field is sent only to controllers that have enabled the extended
34085 event format. Also, add additional reason codes to explain why
34086 a given circuit has been destroyed or truncated. (Patches from
34088 - Add a REMOTE_REASON field to extended CIRC events to tell the
34089 controller about why a remote OR told us to close a circuit.
34090 - Stream events also now have REASON and REMOTE_REASON fields,
34091 working much like those for circuit events.
34092 - There's now a GETINFO ns/... field so that controllers can ask Tor
34093 about the current status of a router.
34094 - A new event type "NS" to inform a controller when our opinion of
34095 a router's status has changed.
34096 - Add a GETINFO events/names and GETINFO features/names so controllers
34097 can tell which events and features are supported.
34098 - A new CLEARDNSCACHE signal to allow controllers to clear the
34099 client-side DNS cache without expiring circuits.
34101 o Security bugfixes:
34102 - When the user sends a NEWNYM signal, clear the client-side DNS
34103 cache too. Otherwise we continue to act on previous information.
34106 - Avoid sending junk to controllers or segfaulting when a controller
34107 uses EVENT_NEW_DESC with verbose nicknames.
34108 - Stop triggering asserts if the controller tries to extend hidden
34109 service circuits (reported by mwenge).
34110 - Avoid infinite loop on unexpected controller input.
34111 - When the controller does a "GETINFO network-status", tell it
34112 about even those routers whose descriptors are very old, and use
34113 long nicknames where appropriate.
34114 - Change NT service functions to be loaded on demand. This lets us
34115 build with MinGW without breaking Tor for Windows 98 users.
34116 - Do DirPort reachability tests less often, since a single test
34117 chews through many circuits before giving up.
34118 - In the hidden service example in torrc.sample, stop recommending
34119 esoteric and discouraged hidden service options.
34120 - When stopping an NT service, wait up to 10 sec for it to actually
34121 stop. Patch from Matt Edman; resolves bug 295.
34122 - Fix handling of verbose nicknames with ORCONN controller events:
34123 make them show up exactly when requested, rather than exactly when
34125 - When reporting verbose nicknames in entry_guards_getinfo(), avoid
34126 printing a duplicate "$" in the keys we send (reported by mwenge).
34127 - Correctly set maximum connection limit on Cygwin. (This time
34129 - Try to detect Windows correctly when cross-compiling.
34130 - Detect the size of the routers file correctly even if it is
34131 corrupted (on systems without mmap) or not page-aligned (on systems
34132 with mmap). This bug was harmless.
34133 - Sometimes we didn't bother sending a RELAY_END cell when an attempt
34134 to open a stream fails; now we do in more cases. This should
34135 make clients able to find a good exit faster in some cases, since
34136 unhandleable requests will now get an error rather than timing out.
34137 - Resolve two memory leaks when rebuilding the on-disk router cache
34138 (reported by fookoowa).
34139 - Clean up minor code warnings suggested by the MIPSpro C compiler,
34140 and reported by some Centos users.
34141 - Controller signals now work on non-Unix platforms that don't define
34142 SIGUSR1 and SIGUSR2 the way we expect.
34143 - Patch from Michael Mohr to contrib/cross.sh, so it checks more
34144 values before failing, and always enables eventdns.
34145 - Libevent-1.2 exports, but does not define in its headers, strlcpy.
34146 Try to fix this in configure.in by checking for most functions
34147 before we check for libevent.
34150 Changes in version 0.1.2.2-alpha - 2006-10-07
34152 - Make our async eventdns library on-by-default for Tor servers,
34153 and plan to deprecate the separate dnsworker threads.
34154 - Add server-side support for "reverse" DNS lookups (using PTR
34155 records so clients can determine the canonical hostname for a given
34156 IPv4 address). Only supported by servers using eventdns; servers
34157 now announce in their descriptors whether they support eventdns.
34158 - Specify and implement client-side SOCKS5 interface for reverse DNS
34159 lookups (see doc/socks-extensions.txt).
34160 - Add a BEGIN_DIR relay cell type for an easier in-protocol way to
34161 connect to directory servers through Tor. Previously, clients needed
34162 to find Tor exits to make private connections to directory servers.
34163 - Avoid choosing Exit nodes for entry or middle hops when the
34164 total bandwidth available from non-Exit nodes is much higher than
34165 the total bandwidth available from Exit nodes.
34166 - Workaround for name servers (like Earthlink's) that hijack failing
34167 DNS requests and replace the no-such-server answer with a "helpful"
34168 redirect to an advertising-driven search portal. Also work around
34169 DNS hijackers who "helpfully" decline to hijack known-invalid
34170 RFC2606 addresses. Config option "ServerDNSDetectHijacking 0"
34171 lets you turn it off.
34172 - Send out a burst of long-range padding cells once we've established
34173 that we're reachable. Spread them over 4 circuits, so hopefully
34174 a few will be fast. This exercises our bandwidth and bootstraps
34175 us into the directory more quickly.
34177 o New/improved config options:
34178 - Add new config option "ResolvConf" to let the server operator
34179 choose an alternate resolve.conf file when using eventdns.
34180 - Add an "EnforceDistinctSubnets" option to control our "exclude
34181 servers on the same /16" behavior. It's still on by default; this
34182 is mostly for people who want to operate private test networks with
34183 all the machines on the same subnet.
34184 - If one of our entry guards is on the ExcludeNodes list, or the
34185 directory authorities don't think it's a good guard, treat it as
34186 if it were unlisted: stop using it as a guard, and throw it off
34187 the guards list if it stays that way for a long time.
34188 - Allow directory authorities to be marked separately as authorities
34189 for the v1 directory protocol, the v2 directory protocol, and
34190 as hidden service directories, to make it easier to retire old
34191 authorities. V1 authorities should set "HSAuthoritativeDir 1"
34192 to continue being hidden service authorities too.
34193 - Remove 8888 as a LongLivedPort, and add 6697 (IRCS).
34195 o Minor features, controller:
34196 - Fix CIRC controller events so that controllers can learn the
34197 identity digests of non-Named servers used in circuit paths.
34198 - Let controllers ask for more useful identifiers for servers. Instead
34199 of learning identity digests for un-Named servers and nicknames
34200 for Named servers, the new identifiers include digest, nickname,
34201 and indication of Named status. Off by default; see control-spec.txt
34202 for more information.
34203 - Add a "getinfo address" controller command so it can display Tor's
34204 best guess to the user.
34205 - New controller event to alert the controller when our server
34206 descriptor has changed.
34207 - Give more meaningful errors on controller authentication failure.
34209 o Minor features, other:
34210 - When asked to resolve a hostname, don't use non-exit servers unless
34211 requested to do so. This allows servers with broken DNS to be
34212 useful to the network.
34213 - Divide eventdns log messages into warn and info messages.
34214 - Reserve the nickname "Unnamed" for routers that can't pick
34215 a hostname: any router can call itself Unnamed; directory
34216 authorities will never allocate Unnamed to any particular router;
34217 clients won't believe that any router is the canonical Unnamed.
34218 - Only include function names in log messages for info/debug messages.
34219 For notice/warn/err, the content of the message should be clear on
34220 its own, and printing the function name only confuses users.
34221 - Avoid some false positives during reachability testing: don't try
34222 to test via a server that's on the same /24 as us.
34223 - If we fail to build a circuit to an intended enclave, and it's
34224 not mandatory that we use that enclave, stop wanting it.
34225 - When eventdns is enabled, allow multithreaded builds on NetBSD and
34226 OpenBSD. (We had previously disabled threads on these platforms
34227 because they didn't have working thread-safe resolver functions.)
34229 o Major bugfixes, anonymity/security:
34230 - If a client asked for a server by name, and there's a named server
34231 in our network-status but we don't have its descriptor yet, we
34232 could return an unnamed server instead.
34233 - Fix NetBSD bug that could allow someone to force uninitialized RAM
34234 to be sent to a server's DNS resolver. This only affects NetBSD
34235 and other platforms that do not bounds-check tolower().
34236 - Reject (most) attempts to use Tor circuits with length one. (If
34237 many people start using Tor as a one-hop proxy, exit nodes become
34238 a more attractive target for compromise.)
34239 - Just because your DirPort is open doesn't mean people should be
34240 able to remotely teach you about hidden service descriptors. Now
34241 only accept rendezvous posts if you've got HSAuthoritativeDir set.
34243 o Major bugfixes, other:
34244 - Don't crash on race condition in dns.c: tor_assert(!resolve->expire)
34245 - When a client asks the server to resolve (not connect to)
34246 an address, and it has a cached answer, give them the cached answer.
34247 Previously, the server would give them no answer at all.
34248 - Allow really slow clients to not hang up five minutes into their
34249 directory downloads (suggested by Adam J. Richter).
34250 - We were building exactly the wrong circuits when we anticipated
34251 hidden service requirements, meaning Tor would have to build all
34252 its circuits on demand.
34253 - Avoid crashing when we mmap a router cache file of size 0.
34254 - When testing reachability of our DirPort, don't launch new
34255 tests when there's already one in progress -- unreachable
34256 servers were stacking up dozens of testing streams.
34258 o Minor bugfixes, correctness:
34259 - If we're a directory mirror and we ask for "all" network status
34260 documents, we would discard status documents from authorities
34261 we don't recognize.
34262 - Avoid a memory corruption bug when creating a hash table for
34264 - Avoid controller-triggered crash when misusing certain commands
34265 from a v0 controller on platforms that do not handle
34266 printf("%s",NULL) gracefully.
34267 - Don't crash when a controller sends a third argument to an
34268 "extendcircuit" request.
34269 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
34270 response; fix error code when "getinfo dir/status/" fails.
34271 - Avoid crash when telling controller stream-status and a stream
34273 - Patch from Adam Langley to fix assert() in eventdns.c.
34274 - Fix a debug log message in eventdns to say "X resolved to Y"
34275 instead of "X resolved to X".
34276 - Make eventdns give strings for DNS errors, not just error numbers.
34277 - Track unreachable entry guards correctly: don't conflate
34278 'unreachable by us right now' with 'listed as down by the directory
34279 authorities'. With the old code, if a guard was unreachable by
34280 us but listed as running, it would clog our guard list forever.
34281 - Behave correctly in case we ever have a network with more than
34282 2GB/s total advertised capacity.
34283 - Make TrackExitHosts case-insensitive, and fix the behavior of
34284 ".suffix" TrackExitHosts items to avoid matching in the middle of
34286 - Finally fix the openssl warnings from newer gccs that believe that
34287 ignoring a return value is okay, but casting a return value and
34288 then ignoring it is a sign of madness.
34289 - Prevent the contrib/exitlist script from printing the same
34290 result more than once.
34291 - Patch from Steve Hildrey: Generate network status correctly on
34292 non-versioning dirservers.
34293 - Don't listen to the X-Your-Address-Is hint if you did the lookup
34294 via Tor; otherwise you'll think you're the exit node's IP address.
34296 o Minor bugfixes, performance:
34297 - Two small performance improvements on parsing descriptors.
34298 - Major performance improvement on inserting descriptors: change
34299 algorithm from O(n^2) to O(n).
34300 - Make the common memory allocation path faster on machines where
34301 malloc(0) returns a pointer.
34302 - Start remembering X-Your-Address-Is directory hints even if you're
34303 a client, so you can become a server more smoothly.
34304 - Avoid duplicate entries on MyFamily line in server descriptor.
34306 o Packaging, features:
34307 - Remove architecture from OS X builds. The official builds are
34308 now universal binaries.
34309 - The Debian package now uses --verify-config when (re)starting,
34310 to distinguish configuration errors from other errors.
34311 - Update RPMs to require libevent 1.1b.
34313 o Packaging, bugfixes:
34314 - Patches so Tor builds with MinGW on Windows.
34315 - Patches so Tor might run on Cygwin again.
34316 - Resume building on non-gcc compilers and ancient gcc. Resume
34317 building with the -O0 compile flag. Resume building cleanly on
34319 - Run correctly on OS X platforms with case-sensitive filesystems.
34320 - Correct includes for net/if.h and net/pfvar.h on OpenBSD (from Tup).
34321 - Add autoconf checks so Tor can build on Solaris x86 again.
34324 - Documented (and renamed) ServerDNSSearchDomains and
34325 ServerDNSResolvConfFile options.
34326 - Be clearer that the *ListenAddress directives can be repeated
34330 Changes in version 0.1.1.24 - 2006-09-29
34332 - Allow really slow clients to not hang up five minutes into their
34333 directory downloads (suggested by Adam J. Richter).
34334 - Fix major performance regression from 0.1.0.x: instead of checking
34335 whether we have enough directory information every time we want to
34336 do something, only check when the directory information has changed.
34337 This should improve client CPU usage by 25-50%.
34338 - Don't crash if, after a server has been running for a while,
34339 it can't resolve its hostname.
34342 - Allow Tor to start when RunAsDaemon is set but no logs are set.
34343 - Don't crash when the controller receives a third argument to an
34344 "extendcircuit" request.
34345 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
34346 response; fix error code when "getinfo dir/status/" fails.
34347 - Fix configure.in to not produce broken configure files with
34348 more recent versions of autoconf. Thanks to Clint for his auto*
34350 - Fix security bug on NetBSD that could allow someone to force
34351 uninitialized RAM to be sent to a server's DNS resolver. This
34352 only affects NetBSD and other platforms that do not bounds-check
34354 - Warn user when using libevent 1.1a or earlier with win32 or kqueue
34355 methods: these are known to be buggy.
34356 - If we're a directory mirror and we ask for "all" network status
34357 documents, we would discard status documents from authorities
34358 we don't recognize.
34361 Changes in version 0.1.2.1-alpha - 2006-08-27
34363 - Add "eventdns" async dns library from Adam Langley, tweaked to
34364 build on OSX and Windows. Only enabled if you pass the
34365 --enable-eventdns argument to configure.
34366 - Allow servers with no hostname or IP address to learn their
34367 IP address by asking the directory authorities. This code only
34368 kicks in when you would normally have exited with a "no address"
34369 error. Nothing's authenticated, so use with care.
34370 - Rather than waiting a fixed amount of time between retrying
34371 application connections, we wait only 5 seconds for the first,
34372 10 seconds for the second, and 15 seconds for each retry after
34373 that. Hopefully this will improve the expected user experience.
34374 - Patch from Tup to add support for transparent AP connections:
34375 this basically bundles the functionality of trans-proxy-tor
34376 into the Tor mainline. Now hosts with compliant pf/netfilter
34377 implementations can redirect TCP connections straight to Tor
34378 without diverting through SOCKS. Needs docs.
34379 - Busy directory servers save lots of memory by spooling server
34380 descriptors, v1 directories, and v2 networkstatus docs to buffers
34381 as needed rather than en masse. Also mmap the cached-routers
34382 files, so we don't need to keep the whole thing in memory too.
34383 - Automatically avoid picking more than one node from the same
34384 /16 network when constructing a circuit.
34385 - Revise and clean up the torrc.sample that we ship with; add
34386 a section for BandwidthRate and BandwidthBurst.
34389 - Split circuit_t into origin_circuit_t and or_circuit_t, and
34390 split connection_t into edge, or, dir, control, and base structs.
34391 These will save quite a bit of memory on busy servers, and they'll
34392 also help us track down bugs in the code and bugs in the spec.
34393 - Experimentally re-enable kqueue on OSX when using libevent 1.1b
34394 or later. Log when we are doing this, so we can diagnose it when
34395 it fails. (Also, recommend libevent 1.1b for kqueue and
34396 win32 methods; deprecate libevent 1.0b harder; make libevent
34397 recommendation system saner.)
34398 - Start being able to build universal binaries on OS X (thanks
34400 - Export the default exit policy via the control port, so controllers
34401 don't need to guess what it is / will be later.
34402 - Add a man page entry for ProtocolWarnings.
34403 - Add TestVia config option to the man page.
34404 - Remove even more protocol-related warnings from Tor server logs,
34405 such as bad TLS handshakes and malformed begin cells.
34406 - Stop fetching descriptors if you're not a dir mirror and you
34407 haven't tried to establish any circuits lately. [This currently
34408 causes some dangerous behavior, because when you start up again
34409 you'll use your ancient server descriptors.]
34410 - New DirPort behavior: if you have your dirport set, you download
34411 descriptors aggressively like a directory mirror, whether or not
34412 your ORPort is set.
34413 - Get rid of the router_retry_connections notion. Now routers
34414 no longer try to rebuild long-term connections to directory
34415 authorities, and directory authorities no longer try to rebuild
34416 long-term connections to all servers. We still don't hang up
34417 connections in these two cases though -- we need to look at it
34418 more carefully to avoid flapping, and we likely need to wait til
34419 0.1.1.x is obsolete.
34420 - Drop compatibility with obsolete Tors that permit create cells
34421 to have the wrong circ_id_type.
34422 - Re-enable per-connection rate limiting. Get rid of the "OP
34423 bandwidth" concept. Lay groundwork for "bandwidth classes" --
34424 separate global buckets that apply depending on what sort of conn
34426 - Start publishing one minute or so after we find our ORPort
34427 to be reachable. This will help reduce the number of descriptors
34428 we have for ourselves floating around, since it's quite likely
34429 other things (e.g. DirPort) will change during that minute too.
34430 - Fork the v1 directory protocol into its own spec document,
34431 and mark dir-spec.txt as the currently correct (v2) spec.
34434 - When we find our DirPort to be reachable, publish a new descriptor
34435 so we'll tell the world (reported by pnx).
34436 - Publish a new descriptor after we hup/reload. This is important
34437 if our config has changed such that we'll want to start advertising
34438 our DirPort now, etc.
34439 - Allow Tor to start when RunAsDaemon is set but no logs are set.
34440 - When we have a state file we cannot parse, tell the user and
34441 move it aside. Now we avoid situations where the user starts
34442 Tor in 1904, Tor writes a state file with that timestamp in it,
34443 the user fixes her clock, and Tor refuses to start.
34444 - Fix configure.in to not produce broken configure files with
34445 more recent versions of autoconf. Thanks to Clint for his auto*
34447 - "tor --verify-config" now exits with -1(255) or 0 depending on
34448 whether the config options are bad or good.
34449 - Resolve bug 321 when using dnsworkers: append a period to every
34450 address we resolve at the exit node, so that we do not accidentally
34451 pick up local addresses, and so that failing searches are retried
34452 in the resolver search domains. (This is already solved for
34453 eventdns.) (This breaks Blossom servers for now.)
34454 - If we are using an exit enclave and we can't connect, e.g. because
34455 its webserver is misconfigured to not listen on localhost, then
34456 back off and try connecting from somewhere else before we fail.
34459 - Start compiling on MinGW on Windows (patches from Mike Chiussi).
34460 - Start compiling on MSVC6 on Windows (patches from Frediano Ziglio).
34461 - Fix bug 314: Tor clients issued "unsafe socks" warnings even
34462 when the IP address is mapped through MapAddress to a hostname.
34463 - Start passing "ipv4" hints to getaddrinfo(), so servers don't do
34464 useless IPv6 DNS resolves.
34465 - Patch suggested by Karsten Loesing: respond to SIGNAL command
34466 before we execute the signal, in case the signal shuts us down.
34467 - Clean up AllowInvalidNodes man page entry.
34468 - Claim a commonname of Tor, rather than TOR, in TLS handshakes.
34469 - Add more asserts to track down an assert error on a windows Tor
34470 server with connection_add being called with socket == -1.
34471 - Handle reporting OR_CONN_EVENT_NEW events to the controller.
34472 - Fix misleading log messages: an entry guard that is "unlisted",
34473 as well as not known to be "down" (because we've never heard
34474 of it), is not therefore "up".
34475 - Remove code to special-case "-cvs" ending, since it has not
34476 actually mattered since 0.0.9.
34477 - Make our socks5 handling more robust to broken socks clients:
34478 throw out everything waiting on the buffer in between socks
34479 handshake phases, since they can't possibly (so the theory
34480 goes) have predicted what we plan to respond to them.
34483 Changes in version 0.1.1.23 - 2006-07-30
34485 - Fast Tor servers, especially exit nodes, were triggering asserts
34486 due to a bug in handling the list of pending DNS resolves. Some
34487 bugs still remain here; we're hunting them.
34488 - Entry guards could crash clients by sending unexpected input.
34489 - More fixes on reachability testing: if you find yourself reachable,
34490 then don't ever make any client requests (so you stop predicting
34491 circuits), then hup or have your clock jump, then later your IP
34492 changes, you won't think circuits are working, so you won't try to
34493 test reachability, so you won't publish.
34496 - Avoid a crash if the controller does a resetconf firewallports
34497 and then a setconf fascistfirewall=1.
34498 - Avoid an integer underflow when the dir authority decides whether
34499 a router is stable: we might wrongly label it stable, and compute
34500 a slightly wrong median stability, when a descriptor is published
34502 - Fix a place where we might trigger an assert if we can't build our
34503 own server descriptor yet.
34506 Changes in version 0.1.1.22 - 2006-07-05
34508 - Fix a big bug that was causing servers to not find themselves
34509 reachable if they changed IP addresses. Since only 0.1.1.22+
34510 servers can do reachability testing correctly, now we automatically
34511 make sure to test via one of these.
34512 - Fix to allow clients and mirrors to learn directory info from
34513 descriptor downloads that get cut off partway through.
34514 - Directory authorities had a bug in deciding if a newly published
34515 descriptor was novel enough to make everybody want a copy -- a few
34516 servers seem to be publishing new descriptors many times a minute.
34518 - Fix a rare bug that was causing some servers to complain about
34519 "closing wedged cpuworkers" and skip some circuit create requests.
34520 - Make the Exit flag in directory status documents actually work.
34523 Changes in version 0.1.1.21 - 2006-06-10
34524 o Crash and assert fixes from 0.1.1.20:
34525 - Fix a rare crash on Tor servers that have enabled hibernation.
34526 - Fix a seg fault on startup for Tor networks that use only one
34527 directory authority.
34528 - Fix an assert from a race condition that occurs on Tor servers
34529 while exiting, where various threads are trying to log that they're
34530 exiting, and delete the logs, at the same time.
34531 - Make our unit tests pass again on certain obscure platforms.
34534 - Add support for building SUSE RPM packages.
34535 - Speed up initial bootstrapping for clients: if we are making our
34536 first ever connection to any entry guard, then don't mark it down
34538 - When only one Tor server in the network is labelled as a guard,
34539 and we've already picked him, we would cycle endlessly picking him
34540 again, being unhappy about it, etc. Now we specifically exclude
34541 current guards when picking a new guard.
34542 - Servers send create cells more reliably after the TLS connection
34543 is established: we were sometimes forgetting to send half of them
34544 when we had more than one pending.
34545 - If we get a create cell that asks us to extend somewhere, but the
34546 Tor server there doesn't match the expected digest, we now send
34547 a destroy cell back, rather than silently doing nothing.
34548 - Make options->RedirectExit work again.
34549 - Make cookie authentication for the controller work again.
34550 - Stop being picky about unusual characters in the arguments to
34551 mapaddress. It's none of our business.
34552 - Add a new config option "TestVia" that lets you specify preferred
34553 middle hops to use for test circuits. Perhaps this will let me
34554 debug the reachability problems better.
34556 o Log / documentation fixes:
34557 - If we're a server and some peer has a broken TLS certificate, don't
34558 log about it unless ProtocolWarnings is set, i.e., we want to hear
34559 about protocol violations by others.
34560 - Fix spelling of VirtualAddrNetwork in man page.
34561 - Add a better explanation at the top of the autogenerated torrc file
34562 about what happened to our old torrc.
34565 Changes in version 0.1.1.20 - 2006-05-23
34567 - Downgrade a log severity where servers complain that they're
34569 - Avoid a compile warning on FreeBSD.
34570 - Remove string size limit on NEWDESC messages; solve bug 291.
34571 - Correct the RunAsDaemon entry in the man page; ignore RunAsDaemon
34572 more thoroughly when we're running on windows.
34575 Changes in version 0.1.1.19-rc - 2006-05-03
34577 - Regenerate our local descriptor if it's dirty and we try to use
34578 it locally (e.g. if it changes during reachability detection).
34579 - If we setconf our ORPort to 0, we continued to listen on the
34580 old ORPort and receive connections.
34581 - Avoid a second warning about machine/limits.h on Debian
34583 - Be willing to add our own routerinfo into the routerlist.
34584 Now authorities will include themselves in their directories
34585 and network-statuses.
34586 - Stop trying to upload rendezvous descriptors to every
34587 directory authority: only try the v1 authorities.
34588 - Servers no longer complain when they think they're not
34589 registered with the directory authorities. There were too many
34591 - Backport dist-rpm changes so rpms can be built without errors.
34594 - Implement an option, VirtualAddrMask, to set which addresses
34595 get handed out in response to mapaddress requests. This works
34596 around a bug in tsocks where 127.0.0.0/8 is never socksified.
34599 Changes in version 0.1.1.18-rc - 2006-04-10
34601 - Work harder to download live network-statuses from all the
34602 directory authorities we know about. Improve the threshold
34603 decision logic so we're more robust to edge cases.
34604 - When fetching rendezvous descriptors, we were willing to ask
34605 v2 authorities too, which would always return 404.
34608 - Stop listing down or invalid nodes in the v1 directory. This will
34609 reduce its bulk by about 1/3, and reduce load on directory
34611 - When deciding whether a router is Fast or Guard-worthy, consider
34612 his advertised BandwidthRate and not just the BandwidthCapacity.
34613 - No longer ship INSTALL and README files -- they are useless now.
34614 - Force rpmbuild to behave and honor target_cpu.
34615 - Avoid warnings about machine/limits.h on Debian GNU/kFreeBSD.
34616 - Start to include translated versions of the tor-doc-*.html
34617 files, along with the screenshots. Still needs more work.
34618 - Start sending back 512 and 451 errors if mapaddress fails,
34619 rather than not sending anything back at all.
34620 - When we fail to bind or listen on an incoming or outgoing
34621 socket, we should close it before failing. otherwise we just
34622 leak it. (thanks to weasel for finding.)
34623 - Allow "getinfo dir/status/foo" to work, as long as your DirPort
34624 is enabled. (This is a hack, and will be fixed in 0.1.2.x.)
34625 - Make NoPublish (even though deprecated) work again.
34626 - Fix a minor security flaw where a versioning auth dirserver
34627 could list a recommended version many times in a row to make
34628 clients more convinced that it's recommended.
34629 - Fix crash bug if there are two unregistered servers running
34630 with the same nickname, one of them is down, and you ask for
34631 them by nickname in your EntryNodes or ExitNodes. Also, try
34632 to pick the one that's running rather than an arbitrary one.
34633 - Fix an infinite loop we could hit if we go offline for too long.
34634 - Complain when we hit WSAENOBUFS on recv() or write() too.
34635 Perhaps this will help us hunt the bug.
34636 - If you're not a versioning dirserver, don't put the string
34637 "client-versions \nserver-versions \n" in your network-status.
34638 - Lower the minimum required number of file descriptors to 1000,
34639 so we can have some overhead for Valgrind on Linux, where the
34640 default ulimit -n is 1024.
34643 - Add tor.dizum.com as the fifth authoritative directory server.
34644 - Add a new config option FetchUselessDescriptors, off by default,
34645 for when you plan to run "exitlist" on your client and you want
34646 to know about even the non-running descriptors.
34649 Changes in version 0.1.1.17-rc - 2006-03-28
34651 - Clients and servers since 0.1.1.10-alpha have been expiring
34652 connections whenever they are idle for 5 minutes and they *do*
34653 have circuits on them. Oops. With this new version, clients will
34654 discard their previous entry guard choices and avoid choosing
34655 entry guards running these flawed versions.
34656 - Fix memory leak when uncompressing concatenated zlib streams. This
34657 was causing substantial leaks over time on Tor servers.
34658 - The v1 directory was including servers as much as 48 hours old,
34659 because that's how the new routerlist->routers works. Now only
34660 include them if they're 20 hours old or less.
34663 - Resume building on irix64, netbsd 2.0, etc.
34664 - On non-gcc compilers (e.g. solaris), use "-g -O" instead of
34666 - Stop writing the "router.desc" file, ever. Nothing uses it anymore,
34667 and it is confusing some users.
34668 - Mirrors stop caching the v1 directory so often.
34669 - Make the max number of old descriptors that a cache will hold
34670 rise with the number of directory authorities, so we can scale.
34671 - Change our win32 uname() hack to be more forgiving about what
34672 win32 versions it thinks it's found.
34675 - Add lefkada.eecs.harvard.edu as a fourth authoritative directory
34677 - When the controller's *setconf commands fail, collect an error
34678 message in a string and hand it back to the controller.
34679 - Make the v2 dir's "Fast" flag based on relative capacity, just
34680 like "Stable" is based on median uptime. Name everything in the
34681 top 7/8 Fast, and only the top 1/2 gets to be a Guard.
34682 - Log server fingerprint on startup, so new server operators don't
34683 have to go hunting around their filesystem for it.
34684 - Return a robots.txt on our dirport to discourage google indexing.
34685 - Let the controller ask for GETINFO dir/status/foo so it can ask
34686 directly rather than connecting to the dir port. Only works when
34687 dirport is set for now.
34689 o New config options rather than constants in the code:
34690 - SocksTimeout: How long do we let a socks connection wait
34691 unattached before we fail it?
34692 - CircuitBuildTimeout: Cull non-open circuits that were born
34693 at least this many seconds ago.
34694 - CircuitIdleTimeout: Cull open clean circuits that were born
34695 at least this many seconds ago.
34698 Changes in version 0.1.1.16-rc - 2006-03-18
34699 o Bugfixes on 0.1.1.15-rc:
34700 - Fix assert when the controller asks to attachstream a connect-wait
34701 or resolve-wait stream.
34702 - Now do address rewriting when the controller asks us to attach
34703 to a particular circuit too. This will let Blossom specify
34704 "moria2.exit" without having to learn what moria2's IP address is.
34705 - Make the "tor --verify-config" command-line work again, so people
34706 can automatically check if their torrc will parse.
34707 - Authoritative dirservers no longer require an open connection from
34708 a server to consider him "reachable". We need this change because
34709 when we add new auth dirservers, old servers won't know not to
34711 - Let Tor build on Sun CC again.
34712 - Fix an off-by-one buffer size in dirserv.c that magically never
34713 hit our three authorities but broke sjmurdoch's own tor network.
34714 - If we as a directory mirror don't know of any v1 directory
34715 authorities, then don't try to cache any v1 directories.
34716 - Stop warning about unknown servers in our family when they are
34717 given as hex digests.
34718 - Stop complaining as quickly to the server operator that he
34719 hasn't registered his nickname/key binding.
34720 - Various cleanups so we can add new V2 Auth Dirservers.
34721 - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to
34722 reflect the updated flags in our v2 dir protocol.
34723 - Resume allowing non-printable characters for exit streams (both
34724 for connecting and for resolving). Now we tolerate applications
34725 that don't follow the RFCs. But continue to block malformed names
34728 o Bugfixes on 0.1.0.x:
34729 - Fix assert bug in close_logs(): when we close and delete logs,
34730 remove them all from the global "logfiles" list.
34731 - Fix minor integer overflow in calculating when we expect to use up
34732 our bandwidth allocation before hibernating.
34733 - Fix a couple of bugs in OpenSSL detection. Also, deal better when
34734 there are multiple SSLs installed with different versions.
34735 - When we try to be a server and Address is not explicitly set and
34736 our hostname resolves to a private IP address, try to use an
34737 interface address if it has a public address. Now Windows machines
34738 that think of themselves as localhost can work by default.
34741 - Let the controller ask for GETINFO dir/server/foo so it can ask
34742 directly rather than connecting to the dir port.
34743 - Let the controller tell us about certain router descriptors
34744 that it doesn't want Tor to use in circuits. Implement
34745 SETROUTERPURPOSE and modify +POSTDESCRIPTOR to do this.
34746 - New config option SafeSocks to reject all application connections
34747 using unsafe socks protocols. Defaults to off.
34750 Changes in version 0.1.1.15-rc - 2006-03-11
34751 o Bugfixes and cleanups:
34752 - When we're printing strings from the network, don't try to print
34753 non-printable characters. This protects us against shell escape
34754 sequence exploits, and also against attacks to fool humans into
34755 misreading their logs.
34756 - Fix a bug where Tor would fail to establish any connections if you
34757 left it off for 24 hours and then started it: we were happy with
34758 the obsolete network statuses, but they all referred to router
34759 descriptors that were too old to fetch, so we ended up with no
34760 valid router descriptors.
34761 - Fix a seg fault in the controller's "getinfo orconn-status"
34762 command while listing status on incoming handshaking connections.
34763 Introduce a status name "NEW" for these connections.
34764 - If we get a linelist or linelist_s config option from the torrc
34765 (e.g. ExitPolicy) and it has no value, warn and skip rather than
34766 silently resetting it to its default.
34767 - Don't abandon entry guards until they've been down or gone for
34769 - Cleaner and quieter log messages.
34772 - New controller signal NEWNYM that makes new application requests
34773 use clean circuits.
34774 - Add a new circuit purpose 'controller' to let the controller ask
34775 for a circuit that Tor won't try to use. Extend the EXTENDCIRCUIT
34776 controller command to let you specify the purpose if you're
34777 starting a new circuit. Add a new SETCIRCUITPURPOSE controller
34778 command to let you change a circuit's purpose after it's been
34780 - Accept "private:*" in routerdesc exit policies; not generated yet
34781 because older Tors do not understand it.
34782 - Add BSD-style contributed startup script "rc.subr" from Peter
34786 Changes in version 0.1.1.14-alpha - 2006-02-20
34787 o Bugfixes on 0.1.1.x:
34788 - Don't die if we ask for a stdout or stderr log (even implicitly)
34789 and we're set to RunAsDaemon -- just warn.
34790 - We still had a few bugs in the OR connection rotation code that
34791 caused directory servers to slowly aggregate connections to other
34792 fast Tor servers. This time for sure!
34793 - Make log entries on Win32 include the name of the function again.
34794 - We were treating a pair of exit policies if they were equal even
34795 if one said accept and the other said reject -- causing us to
34796 not always publish a new descriptor since we thought nothing
34798 - Retry pending server downloads as well as pending networkstatus
34799 downloads when we unexpectedly get a socks request.
34800 - We were ignoring the IS_FAST flag in the directory status,
34801 meaning we were willing to pick trivial-bandwidth nodes for "fast"
34803 - If the controller's SAVECONF command fails (e.g. due to file
34804 permissions), let the controller know that it failed.
34807 - If we're trying to be a Tor server and running Windows 95/98/ME
34808 as a server, explain that we'll likely crash.
34809 - When we're a server, a client asks for an old-style directory,
34810 and our write bucket is empty, don't give it to him. This way
34811 small servers can continue to serve the directory *sometimes*,
34812 without getting overloaded.
34813 - Compress exit policies even more -- look for duplicate lines
34815 - Clients now honor the "guard" flag in the router status when
34816 picking entry guards, rather than looking at is_fast or is_stable.
34817 - Retain unrecognized lines in $DATADIR/state file, so that we can
34818 be forward-compatible.
34819 - Generate 18.0.0.0/8 address policy format in descs when we can;
34820 warn when the mask is not reducible to a bit-prefix.
34821 - Let the user set ControlListenAddress in the torrc. This can be
34822 dangerous, but there are some cases (like a secured LAN) where it
34824 - Split ReachableAddresses into ReachableDirAddresses and
34825 ReachableORAddresses, so we can restrict Dir conns to port 80
34826 and OR conns to port 443.
34827 - Now we can target arch and OS in rpm builds (contributed by
34828 Phobos). Also make the resulting dist-rpm filename match the
34830 - New config options to help controllers: FetchServerDescriptors
34831 and FetchHidServDescriptors for whether to fetch server
34832 info and hidserv info or let the controller do it, and
34833 PublishServerDescriptor and PublishHidServDescriptors.
34834 - Also let the controller set the __AllDirActionsPrivate config
34835 option if you want all directory fetches/publishes to happen via
34836 Tor (it assumes your controller bootstraps your circuits).
34839 Changes in version 0.1.0.17 - 2006-02-17
34840 o Crash bugfixes on 0.1.0.x:
34841 - When servers with a non-zero DirPort came out of hibernation,
34842 sometimes they would trigger an assert.
34844 o Other important bugfixes:
34845 - On platforms that don't have getrlimit (like Windows), we were
34846 artificially constraining ourselves to a max of 1024
34847 connections. Now just assume that we can handle as many as 15000
34848 connections. Hopefully this won't cause other problems.
34850 o Backported features:
34851 - When we're a server, a client asks for an old-style directory,
34852 and our write bucket is empty, don't give it to him. This way
34853 small servers can continue to serve the directory *sometimes*,
34854 without getting overloaded.
34855 - Whenever you get a 503 in response to a directory fetch, try
34856 once more. This will become important once servers start sending
34857 503's whenever they feel busy.
34858 - Fetch a new directory every 120 minutes, not every 40 minutes.
34859 Now that we have hundreds of thousands of users running the old
34860 directory algorithm, it's starting to hurt a lot.
34861 - Bump up the period for forcing a hidden service descriptor upload
34862 from 20 minutes to 1 hour.
34865 Changes in version 0.1.1.13-alpha - 2006-02-09
34866 o Crashes in 0.1.1.x:
34867 - When you tried to setconf ORPort via the controller, Tor would
34868 crash. So people using TorCP to become a server were sad.
34869 - Solve (I hope) the stack-smashing bug that we were seeing on fast
34870 servers. The problem appears to be something do with OpenSSL's
34871 random number generation, or how we call it, or something. Let me
34872 know if the crashes continue.
34873 - Turn crypto hardware acceleration off by default, until we find
34874 somebody smart who can test it for us. (It appears to produce
34875 seg faults in at least some cases.)
34876 - Fix a rare assert error when we've tried all intro points for
34877 a hidden service and we try fetching the service descriptor again:
34878 "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed"
34881 - Fix a major load balance bug: we were round-robining in 16 KB
34882 chunks, and servers with bandwidthrate of 20 KB, while downloading
34883 a 600 KB directory, would starve their other connections. Now we
34884 try to be a bit more fair.
34885 - Dir authorities and mirrors were never expiring the newest
34886 descriptor for each server, causing memory and directory bloat.
34887 - Fix memory-bloating and connection-bloating bug on servers: We
34888 were never closing any connection that had ever had a circuit on
34889 it, because we were checking conn->n_circuits == 0, yet we had a
34890 bug that let it go negative.
34891 - Make Tor work using squid as your http proxy again -- squid
34892 returns an error if you ask for a URL that's too long, and it uses
34893 a really generic error message. Plus, many people are behind a
34894 transparent squid so they don't even realize it.
34895 - On platforms that don't have getrlimit (like Windows), we were
34896 artificially constraining ourselves to a max of 1024
34897 connections. Now just assume that we can handle as many as 15000
34898 connections. Hopefully this won't cause other problems.
34899 - Add a new config option ExitPolicyRejectPrivate which defaults to
34900 1. This means all exit policies will begin with rejecting private
34901 addresses, unless the server operator explicitly turns it off.
34904 - Clients no longer download descriptors for non-running
34906 - Before we add new directory authorities, we should make it
34907 clear that only v1 authorities should receive/publish hidden
34908 service descriptors.
34911 - As soon as we've fetched some more directory info, immediately
34912 try to download more server descriptors. This way we don't have
34913 a 10 second pause during initial bootstrapping.
34914 - Remove even more loud log messages that the server operator can't
34916 - When we're running an obsolete or un-recommended version, make
34917 the log message more clear about what the problem is and what
34918 versions *are* still recommended.
34919 - Provide a more useful warn message when our onion queue gets full:
34920 the CPU is too slow or the exit policy is too liberal.
34921 - Don't warn when we receive a 503 from a dirserver/cache -- this
34922 will pave the way for them being able to refuse if they're busy.
34923 - When we fail to bind a listener, try to provide a more useful
34924 log message: e.g., "Is Tor already running?"
34925 - Adjust tor-spec to parameterize cell and key lengths. Now Ian
34926 Goldberg can prove things about our handshake protocol more
34928 - MaxConn has been obsolete for a while now. Document the ConnLimit
34929 config option, which is a *minimum* number of file descriptors
34930 that must be available else Tor refuses to start.
34931 - Apply Matt Ghali's --with-syslog-facility patch to ./configure
34932 if you log to syslog and want something other than LOG_DAEMON.
34933 - Make dirservers generate a separate "guard" flag to mean,
34934 "would make a good entry guard". Make clients parse it and vote
34935 on it. Not used by clients yet.
34936 - Implement --with-libevent-dir option to ./configure. Also, improve
34937 search techniques to find libevent, and use those for openssl too.
34938 - Bump the default bandwidthrate to 3 MB, and burst to 6 MB
34939 - Only start testing reachability once we've established a
34940 circuit. This will make startup on dirservers less noisy.
34941 - Don't try to upload hidden service descriptors until we have
34942 established a circuit.
34943 - Fix the controller's "attachstream 0" command to treat conn like
34944 it just connected, doing address remapping, handling .exit and
34945 .onion idioms, and so on. Now we're more uniform in making sure
34946 that the controller hears about new and closing connections.
34949 Changes in version 0.1.1.12-alpha - 2006-01-11
34950 o Bugfixes on 0.1.1.x:
34951 - The fix to close duplicate server connections was closing all
34952 Tor client connections if they didn't establish a circuit
34953 quickly enough. Oops.
34954 - Fix minor memory issue (double-free) that happened on exit.
34956 o Bugfixes on 0.1.0.x:
34957 - Tor didn't warn when it failed to open a log file.
34960 Changes in version 0.1.1.11-alpha - 2006-01-10
34961 o Crashes in 0.1.1.x:
34962 - Include all the assert/crash fixes from 0.1.0.16.
34963 - If you start Tor and then quit very quickly, there were some
34964 races that tried to free things that weren't allocated yet.
34965 - Fix a rare memory stomp if you're running hidden services.
34966 - Fix segfault when specifying DirServer in config without nickname.
34967 - Fix a seg fault when you finish connecting to a server but at
34968 that moment you dump his server descriptor.
34969 - Extendcircuit and Attachstream controller commands would
34970 assert/crash if you don't give them enough arguments.
34971 - Fix an assert error when we're out of space in the connection_list
34972 and we try to post a hidden service descriptor (reported by weasel).
34973 - If you specify a relative torrc path and you set RunAsDaemon in
34974 your torrc, then it chdir()'s to the new directory. If you HUP,
34975 it tries to load the new torrc location, fails, and exits.
34976 The fix: no longer allow a relative path to torrc using -f.
34979 - Implement "entry guards": automatically choose a handful of entry
34980 nodes and stick with them for all circuits. Only pick new guards
34981 when the ones you have are unsuitable, and if the old guards
34982 become suitable again, switch back. This will increase security
34983 dramatically against certain end-point attacks. The EntryNodes
34984 config option now provides some hints about which entry guards you
34985 want to use most; and StrictEntryNodes means to only use those.
34986 - New directory logic: download by descriptor digest, not by
34987 fingerprint. Caches try to download all listed digests from
34988 authorities; clients try to download "best" digests from caches.
34989 This avoids partitioning and isolating attacks better.
34990 - Make the "stable" router flag in network-status be the median of
34991 the uptimes of running valid servers, and make clients pay
34992 attention to the network-status flags. Thus the cutoff adapts
34993 to the stability of the network as a whole, making IRC, IM, etc
34994 connections more reliable.
34997 - Tor servers with dynamic IP addresses were needing to wait 18
34998 hours before they could start doing reachability testing using
34999 the new IP address and ports. This is because they were using
35000 the internal descriptor to learn what to test, yet they were only
35001 rebuilding the descriptor once they decided they were reachable.
35002 - Tor 0.1.1.9 and 0.1.1.10 had a serious bug that caused clients
35003 to download certain server descriptors, throw them away, and then
35004 fetch them again after 30 minutes. Now mirrors throw away these
35005 server descriptors so clients can't get them.
35006 - We were leaving duplicate connections to other ORs open for a week,
35007 rather than closing them once we detect a duplicate. This only
35008 really affected authdirservers, but it affected them a lot.
35009 - Spread the authdirservers' reachability testing over the entire
35010 testing interval, so we don't try to do 500 TLS's at once every
35014 - If the network is down, and we try to connect to a conn because
35015 we have a circuit in mind, and we timeout (30 seconds) because the
35016 network never answers, we were expiring the circuit, but we weren't
35017 obsoleting the connection or telling the entry_guards functions.
35018 - Some Tor servers process billions of cells per day. These statistics
35019 need to be uint64_t's.
35020 - Check for integer overflows in more places, when adding elements
35021 to smartlists. This could possibly prevent a buffer overflow
35022 on malicious huge inputs. I don't see any, but I haven't looked
35024 - ReachableAddresses kept growing new "reject *:*" lines on every
35026 - When you "setconf log" via the controller, it should remove all
35027 logs. We were automatically adding back in a "log notice stdout".
35028 - Newly bootstrapped Tor networks couldn't establish hidden service
35029 circuits until they had nodes with high uptime. Be more tolerant.
35030 - We were marking servers down when they could not answer every piece
35031 of the directory request we sent them. This was far too harsh.
35032 - Fix the torify (tsocks) config file to not use Tor for localhost
35034 - Directory authorities now go to the proper authority when asking for
35035 a networkstatus, even when they want a compressed one.
35036 - Fix a harmless bug that was causing Tor servers to log
35037 "Got an end because of misc error, but we're not an AP. Closing."
35038 - Authorities were treating their own descriptor changes as cosmetic,
35039 meaning the descriptor available in the network-status and the
35040 descriptor that clients downloaded were different.
35041 - The OS X installer was adding a symlink for tor_resolve but
35042 the binary was called tor-resolve (reported by Thomas Hardly).
35043 - Workaround a problem with some http proxies where they refuse GET
35044 requests that specify "Content-Length: 0" (reported by Adrian).
35045 - Fix wrong log message when you add a "HiddenServiceNodes" config
35046 line without any HiddenServiceDir line (reported by Chris Thomas).
35049 - Write the TorVersion into the state file so we have a prayer of
35050 keeping forward and backward compatibility.
35051 - Revive the FascistFirewall config option rather than eliminating it:
35052 now it's a synonym for ReachableAddresses *:80,*:443.
35053 - Clients choose directory servers from the network status lists,
35054 not from their internal list of router descriptors. Now they can
35055 go to caches directly rather than needing to go to authorities
35057 - Directory authorities ignore router descriptors that have only
35058 cosmetic differences: do this for 0.1.0.x servers now too.
35059 - Add a new flag to network-status indicating whether the server
35060 can answer v2 directory requests too.
35061 - Authdirs now stop whining so loudly about bad descriptors that
35062 they fetch from other dirservers. So when there's a log complaint,
35063 it's for sure from a freshly uploaded descriptor.
35064 - Reduce memory requirements in our structs by changing the order
35066 - There used to be two ways to specify your listening ports in a
35067 server descriptor: on the "router" line and with a separate "ports"
35068 line. Remove support for the "ports" line.
35069 - New config option "AuthDirRejectUnlisted" for auth dirservers as
35070 a panic button: if we get flooded with unusable servers we can
35071 revert to only listing servers in the approved-routers file.
35072 - Auth dir servers can now mark a fingerprint as "!reject" or
35073 "!invalid" in the approved-routers file (as its nickname), to
35074 refuse descriptors outright or include them but marked as invalid.
35075 - Servers store bandwidth history across restarts/crashes.
35076 - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can
35077 get a better idea of why their circuits failed. Not used yet.
35078 - Directory mirrors now cache up to 16 unrecognized network-status
35079 docs. Now we can add new authdirservers and they'll be cached too.
35080 - When picking a random directory, prefer non-authorities if any
35082 - New controller option "getinfo desc/all-recent" to fetch the
35083 latest server descriptor for every router that Tor knows about.
35086 Changes in version 0.1.0.16 - 2006-01-02
35087 o Crash bugfixes on 0.1.0.x:
35088 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
35089 corrupting the heap, losing FDs, or crashing when we need to resize
35090 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
35091 - It turns out sparc64 platforms crash on unaligned memory access
35092 too -- so detect and avoid this.
35093 - Handle truncated compressed data correctly (by detecting it and
35095 - Fix possible-but-unlikely free(NULL) in control.c.
35096 - When we were closing connections, there was a rare case that
35097 stomped on memory, triggering seg faults and asserts.
35098 - Avoid potential infinite recursion when building a descriptor. (We
35099 don't know that it ever happened, but better to fix it anyway.)
35100 - We were neglecting to unlink marked circuits from soon-to-close OR
35101 connections, which caused some rare scribbling on freed memory.
35102 - Fix a memory stomping race bug when closing the joining point of two
35103 rendezvous circuits.
35104 - Fix an assert in time parsing found by Steven Murdoch.
35106 o Other bugfixes on 0.1.0.x:
35107 - When we're doing reachability testing, provide more useful log
35108 messages so the operator knows what to expect.
35109 - Do not check whether DirPort is reachable when we are suppressing
35110 advertising it because of hibernation.
35111 - When building with -static or on Solaris, we sometimes needed -ldl.
35112 - When we're deciding whether a stream has enough circuits around
35113 that can handle it, count the freshly dirty ones and not the ones
35114 that are so dirty they won't be able to handle it.
35115 - When we're expiring old circuits, we had a logic error that caused
35116 us to close new rendezvous circuits rather than old ones.
35117 - Give a more helpful log message when you try to change ORPort via
35118 the controller: you should upgrade Tor if you want that to work.
35119 - We were failing to parse Tor versions that start with "Tor ".
35120 - Tolerate faulty streams better: when a stream fails for reason
35121 exitpolicy, stop assuming that the router is lying about his exit
35122 policy. When a stream fails for reason misc, allow it to retry just
35123 as if it was resolvefailed. When a stream has failed three times,
35124 reset its failure count so we can try again and get all three tries.
35127 Changes in version 0.1.1.10-alpha - 2005-12-11
35128 o Correctness bugfixes on 0.1.0.x:
35129 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
35130 corrupting the heap, losing FDs, or crashing when we need to resize
35131 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
35132 - Stop doing the complex voodoo overkill checking for insecure
35133 Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy.
35134 - When we were closing connections, there was a rare case that
35135 stomped on memory, triggering seg faults and asserts.
35136 - We were neglecting to unlink marked circuits from soon-to-close OR
35137 connections, which caused some rare scribbling on freed memory.
35138 - When we're deciding whether a stream has enough circuits around
35139 that can handle it, count the freshly dirty ones and not the ones
35140 that are so dirty they won't be able to handle it.
35141 - Recover better from TCP connections to Tor servers that are
35142 broken but don't tell you (it happens!); and rotate TLS
35143 connections once a week.
35144 - When we're expiring old circuits, we had a logic error that caused
35145 us to close new rendezvous circuits rather than old ones.
35146 - Fix a scary-looking but apparently harmless bug where circuits
35147 would sometimes start out in state CIRCUIT_STATE_OR_WAIT at
35148 servers, and never switch to state CIRCUIT_STATE_OPEN.
35149 - When building with -static or on Solaris, we sometimes needed to
35151 - Give a useful message when people run Tor as the wrong user,
35152 rather than telling them to start chowning random directories.
35153 - We were failing to inform the controller about new .onion streams.
35155 o Security bugfixes on 0.1.0.x:
35156 - Refuse server descriptors if the fingerprint line doesn't match
35157 the included identity key. Tor doesn't care, but other apps (and
35158 humans) might actually be trusting the fingerprint line.
35159 - We used to kill the circuit when we receive a relay command we
35160 don't recognize. Now we just drop it.
35161 - Start obeying our firewall options more rigorously:
35162 . If we can't get to a dirserver directly, try going via Tor.
35163 . Don't ever try to connect (as a client) to a place our
35164 firewall options forbid.
35165 . If we specify a proxy and also firewall options, obey the
35166 firewall options even when we're using the proxy: some proxies
35167 can only proxy to certain destinations.
35168 - Fix a bug found by Lasse Overlier: when we were making internal
35169 circuits (intended to be cannibalized later for rendezvous and
35170 introduction circuits), we were picking them so that they had
35171 useful exit nodes. There was no need for this, and it actually
35172 aids some statistical attacks.
35173 - Start treating internal circuits and exit circuits separately.
35174 It's important to keep them separate because internal circuits
35175 have their last hops picked like middle hops, rather than like
35176 exit hops. So exiting on them will break the user's expectations.
35178 o Bugfixes on 0.1.1.x:
35179 - Take out the mis-feature where we tried to detect IP address
35180 flapping for people with DynDNS, and chose not to upload a new
35181 server descriptor sometimes.
35182 - Try to be compatible with OpenSSL 0.9.6 again.
35183 - Log fix: when the controller is logging about .onion addresses,
35184 sometimes it didn't include the ".onion" part of the address.
35185 - Don't try to modify options->DirServers internally -- if the
35186 user didn't specify any, just add the default ones directly to
35187 the trusted dirserver list. This fixes a bug where people running
35188 controllers would use SETCONF on some totally unrelated config
35189 option, and Tor would start yelling at them about changing their
35191 - Let the controller's redirectstream command specify a port, in
35192 case the controller wants to change that too.
35193 - When we requested a pile of server descriptors, we sometimes
35194 accidentally launched a duplicate request for the first one.
35195 - Bugfix for trackhostexits: write down the fingerprint of the
35196 chosen exit, not its nickname, because the chosen exit might not
35198 - When parsing foo.exit, if foo is unknown, and we are leaving
35199 circuits unattached, set the chosen_exit field and leave the
35200 address empty. This matters because controllers got confused
35202 - Directory authorities no longer try to download server
35203 descriptors that they know they will reject.
35205 o Features and updates:
35206 - Replace balanced trees with hash tables: this should make stuff
35207 significantly faster.
35208 - Resume using the AES counter-mode implementation that we ship,
35209 rather than OpenSSL's. Ours is significantly faster.
35210 - Many other CPU and memory improvements.
35211 - Add a new config option FastFirstHopPK (on by default) so clients
35212 do a trivial crypto handshake for their first hop, since TLS has
35213 already taken care of confidentiality and authentication.
35214 - Add a new config option TestSocks so people can see if their
35215 applications are using socks4, socks4a, socks5-with-ip, or
35216 socks5-with-hostname. This way they don't have to keep mucking
35217 with tcpdump and wondering if something got cached somewhere.
35218 - Warn when listening on a public address for socks. I suspect a
35219 lot of people are setting themselves up as open socks proxies,
35220 and they have no idea that jerks on the Internet are using them,
35221 since they simply proxy the traffic into the Tor network.
35222 - Add "private:*" as an alias in configuration for policies. Now
35223 you can simplify your exit policy rather than needing to list
35224 every single internal or nonroutable network space.
35225 - Add a new controller event type that allows controllers to get
35226 all server descriptors that were uploaded to a router in its role
35227 as authoritative dirserver.
35228 - Start shipping socks-extensions.txt, tor-doc-unix.html,
35229 tor-doc-server.html, and stylesheet.css in the tarball.
35230 - Stop shipping tor-doc.html in the tarball.
35233 Changes in version 0.1.1.9-alpha - 2005-11-15
35234 o Usability improvements:
35235 - Start calling it FooListenAddress rather than FooBindAddress,
35236 since few of our users know what it means to bind an address
35238 - Reduce clutter in server logs. We're going to try to make
35239 them actually usable now. New config option ProtocolWarnings that
35240 lets you hear about how _other Tors_ are breaking the protocol. Off
35242 - Divide log messages into logging domains. Once we put some sort
35243 of interface on this, it will let people looking at more verbose
35244 log levels specify the topics they want to hear more about.
35245 - Make directory servers return better http 404 error messages
35246 instead of a generic "Servers unavailable".
35247 - Check for even more Windows version flags when writing the platform
35248 string in server descriptors, and note any we don't recognize.
35249 - Clean up more of the OpenSSL memory when exiting, so we can detect
35250 memory leaks better.
35251 - Make directory authorities be non-versioning, non-naming by
35252 default. Now we can add new directory servers without requiring
35253 their operators to pay close attention.
35254 - When logging via syslog, include the pid whenever we provide
35255 a log entry. Suggested by Todd Fries.
35257 o Performance improvements:
35258 - Directory servers now silently throw away new descriptors that
35259 haven't changed much if the timestamps are similar. We do this to
35260 tolerate older Tor servers that upload a new descriptor every 15
35261 minutes. (It seemed like a good idea at the time.)
35262 - Inline bottleneck smartlist functions; use fast versions by default.
35263 - Add a "Map from digest to void*" abstraction digestmap_t so we
35264 can do less hex encoding/decoding. Use it in router_get_by_digest()
35265 to resolve a performance bottleneck.
35266 - Allow tor_gzip_uncompress to extract as much as possible from
35267 truncated compressed data. Try to extract as many
35268 descriptors as possible from truncated http responses (when
35269 DIR_PURPOSE_FETCH_ROUTERDESC).
35270 - Make circ->onionskin a pointer, not a static array. moria2 was using
35271 125000 circuit_t's after it had been up for a few weeks, which
35272 translates to 20+ megs of wasted space.
35273 - The private half of our EDH handshake keys are now chosen out
35274 of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.)
35276 o Security improvements:
35277 - Start making directory caches retain old routerinfos, so soon
35278 clients can start asking by digest of descriptor rather than by
35279 fingerprint of server.
35280 - Add half our entropy from RAND_poll in OpenSSL. This knows how
35281 to use egd (if present), openbsd weirdness (if present), vms/os2
35282 weirdness (if we ever port there), and more in the future.
35284 o Bugfixes on 0.1.0.x:
35285 - Do round-robin writes of at most 16 kB per write. This might be
35286 more fair on loaded Tor servers, and it might resolve our Windows
35287 crash bug. It might also slow things down.
35288 - Our TLS handshakes were generating a single public/private
35289 keypair for the TLS context, rather than making a new one for
35290 each new connections. Oops. (But we were still rotating them
35291 periodically, so it's not so bad.)
35292 - When we were cannibalizing a circuit with a particular exit
35293 node in mind, we weren't checking to see if that exit node was
35294 already present earlier in the circuit. Oops.
35295 - When a Tor server's IP changes (e.g. from a dyndns address),
35296 upload a new descriptor so clients will learn too.
35297 - Really busy servers were keeping enough circuits open on stable
35298 connections that they were wrapping around the circuit_id
35299 space. (It's only two bytes.) This exposed a bug where we would
35300 feel free to reuse a circuit_id even if it still exists but has
35301 been marked for close. Try to fix this bug. Some bug remains.
35302 - If we would close a stream early (e.g. it asks for a .exit that
35303 we know would refuse it) but the LeaveStreamsUnattached config
35304 option is set by the controller, then don't close it.
35306 o Bugfixes on 0.1.1.8-alpha:
35307 - Fix a big pile of memory leaks, some of them serious.
35308 - Do not try to download a routerdesc if we would immediately reject
35310 - Resume inserting a newline between all router descriptors when
35311 generating (old style) signed directories, since our spec says
35313 - When providing content-type application/octet-stream for
35314 server descriptors using .z, we were leaving out the
35315 content-encoding header. Oops. (Everything tolerated this just
35316 fine, but that doesn't mean we need to be part of the problem.)
35317 - Fix a potential seg fault in getconf and getinfo using version 1
35318 of the controller protocol.
35319 - Avoid crash: do not check whether DirPort is reachable when we
35320 are suppressing it because of hibernation.
35321 - Make --hash-password not crash on exit.
35324 Changes in version 0.1.1.8-alpha - 2005-10-07
35325 o New features (major):
35326 - Clients don't download or use the directory anymore. Now they
35327 download and use network-statuses from the trusted dirservers,
35328 and fetch individual server descriptors as needed from mirrors.
35329 See dir-spec.txt for all the gory details.
35330 - Be more conservative about whether to advertise our DirPort.
35331 The main change is to not advertise if we're running at capacity
35332 and either a) we could hibernate or b) our capacity is low and
35333 we're using a default DirPort.
35334 - Use OpenSSL's AES when OpenSSL has version 0.9.7 or later.
35336 o New features (minor):
35337 - Try to be smart about when to retry network-status and
35338 server-descriptor fetches. Still needs some tuning.
35339 - Stop parsing, storing, or using running-routers output (but
35340 mirrors still cache and serve it).
35341 - Consider a threshold of versioning dirservers (dirservers who have
35342 an opinion about which Tor versions are still recommended) before
35343 deciding whether to warn the user that he's obsolete.
35344 - Dirservers can now reject/invalidate by key and IP, with the
35345 config options "AuthDirInvalid" and "AuthDirReject". This is
35346 useful since currently we automatically list servers as running
35347 and usable even if we know they're jerks.
35348 - Provide dire warnings to any users who set DirServer; move it out
35349 of torrc.sample and into torrc.complete.
35350 - Add MyFamily to torrc.sample in the server section.
35351 - Add nicknames to the DirServer line, so we can refer to them
35352 without requiring all our users to memorize their IP addresses.
35353 - When we get an EOF or a timeout on a directory connection, note
35354 how many bytes of serverdesc we are dropping. This will help
35355 us determine whether it is smart to parse incomplete serverdesc
35357 - Add a new function to "change pseudonyms" -- that is, to stop
35358 using any currently-dirty circuits for new streams, so we don't
35359 link new actions to old actions. Currently it's only called on
35360 HUP (or SIGNAL RELOAD).
35361 - On sighup, if UseHelperNodes changed to 1, use new circuits.
35362 - Start using RAND_bytes rather than RAND_pseudo_bytes from
35363 OpenSSL. Also, reseed our entropy every hour, not just at
35364 startup. And entropy in 512-bit chunks, not 160-bit chunks.
35366 o Fixes on 0.1.1.7-alpha:
35367 - Nobody ever implemented EVENT_ADDRMAP for control protocol
35368 version 0, so don't let version 0 controllers ask for it.
35369 - If you requested something with too many newlines via the
35370 v1 controller protocol, you could crash tor.
35371 - Fix a number of memory leaks, including some pretty serious ones.
35372 - Re-enable DirPort testing again, so Tor servers will be willing
35373 to advertise their DirPort if it's reachable.
35374 - On TLS handshake, only check the other router's nickname against
35375 its expected nickname if is_named is set.
35377 o Fixes forward-ported from 0.1.0.15:
35378 - Don't crash when we don't have any spare file descriptors and we
35379 try to spawn a dns or cpu worker.
35380 - Make the numbers in read-history and write-history into uint64s,
35381 so they don't overflow and publish negatives in the descriptor.
35383 o Fixes on 0.1.0.x:
35384 - For the OS X package's modified privoxy config file, comment
35385 out the "logfile" line so we don't log everything passed
35387 - We were whining about using socks4 or socks5-with-local-lookup
35388 even when it's an IP in the "virtual" range we designed exactly
35390 - We were leaking some memory every time the client changes IPs.
35391 - Never call free() on tor_malloc()d memory. This will help us
35392 use dmalloc to detect memory leaks.
35393 - Check for named servers when looking them up by nickname;
35394 warn when we'recalling a non-named server by its nickname;
35395 don't warn twice about the same name.
35396 - Try to list MyFamily elements by key, not by nickname, and warn
35397 if we've not heard of the server.
35398 - Make windows platform detection (uname equivalent) smarter.
35399 - It turns out sparc64 doesn't like unaligned access either.
35402 Changes in version 0.1.0.15 - 2005-09-23
35403 o Bugfixes on 0.1.0.x:
35404 - Reject ports 465 and 587 (spam targets) in default exit policy.
35405 - Don't crash when we don't have any spare file descriptors and we
35406 try to spawn a dns or cpu worker.
35407 - Get rid of IgnoreVersion undocumented config option, and make us
35408 only warn, never exit, when we're running an obsolete version.
35409 - Don't try to print a null string when your server finds itself to
35410 be unreachable and the Address config option is empty.
35411 - Make the numbers in read-history and write-history into uint64s,
35412 so they don't overflow and publish negatives in the descriptor.
35413 - Fix a minor memory leak in smartlist_string_remove().
35414 - We were only allowing ourselves to upload a server descriptor at
35415 most every 20 minutes, even if it changed earlier than that.
35416 - Clean up log entries that pointed to old URLs.
35419 Changes in version 0.1.1.7-alpha - 2005-09-14
35420 o Fixes on 0.1.1.6-alpha:
35421 - Exit servers were crashing when people asked them to make a
35422 connection to an address not in their exit policy.
35423 - Looking up a non-existent stream for a v1 control connection would
35425 - Fix a seg fault if we ask a dirserver for a descriptor by
35426 fingerprint but he doesn't know about him.
35427 - SETCONF was appending items to linelists, not clearing them.
35428 - SETCONF SocksBindAddress killed Tor if it fails to bind. Now back
35429 out and refuse the setconf if it would fail.
35430 - Downgrade the dirserver log messages when whining about
35434 - Add Peter Palfrader's check-tor script to tor/contrib/
35435 It lets you easily check whether a given server (referenced by
35436 nickname) is reachable by you.
35437 - Numerous changes to move towards client-side v2 directories. Not
35440 o Fixes on 0.1.0.x:
35441 - If the user gave tor an odd number of command-line arguments,
35442 we were silently ignoring the last one. Now we complain and fail.
35443 [This wins the oldest-bug prize -- this bug has been present since
35444 November 2002, as released in Tor 0.0.0.]
35445 - Do not use unaligned memory access on alpha, mips, or mipsel.
35446 It *works*, but is very slow, so we treat them as if it doesn't.
35447 - Retry directory requests if we fail to get an answer we like
35448 from a given dirserver (we were retrying before, but only if
35449 we fail to connect).
35450 - When writing the RecommendedVersions line, sort them first.
35451 - When the client asked for a rendezvous port that the hidden
35452 service didn't want to provide, we were sending an IP address
35453 back along with the end cell. Fortunately, it was zero. But stop
35455 - Correct "your server is reachable" log entries to indicate that
35456 it was self-testing that told us so.
35459 Changes in version 0.1.1.6-alpha - 2005-09-09
35460 o Fixes on 0.1.1.5-alpha:
35461 - We broke fascistfirewall in 0.1.1.5-alpha. Oops.
35462 - Fix segfault in unit tests in 0.1.1.5-alpha. Oops.
35463 - Fix bug with tor_memmem finding a match at the end of the string.
35464 - Make unit tests run without segfaulting.
35465 - Resolve some solaris x86 compile warnings.
35466 - Handle duplicate lines in approved-routers files without warning.
35467 - Fix bug where as soon as a server refused any requests due to his
35468 exit policy (e.g. when we ask for localhost and he tells us that's
35469 127.0.0.1 and he won't do it), we decided he wasn't obeying his
35470 exit policy using him for any exits.
35471 - Only do openssl hardware accelerator stuff if openssl version is
35474 o New controller features/fixes:
35475 - Add a "RESETCONF" command so you can set config options like
35476 AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
35477 a config option in the torrc with no value, then it clears it
35478 entirely (rather than setting it to its default).
35479 - Add a "GETINFO config-file" to tell us where torrc is.
35480 - Avoid sending blank lines when GETINFO replies should be empty.
35481 - Add a QUIT command for the controller (for using it manually).
35482 - Fix a bug in SAVECONF that was adding default dirservers and
35483 other redundant entries to the torrc file.
35485 o Start on the new directory design:
35486 - Generate, publish, cache, serve new network-status format.
35487 - Publish individual descriptors (by fingerprint, by "all", and by
35489 - Publish client and server recommended versions separately.
35490 - Allow tor_gzip_uncompress() to handle multiple concatenated
35491 compressed strings. Serve compressed groups of router
35492 descriptors. The compression logic here could be more
35494 - Distinguish v1 authorities (all currently trusted directories)
35495 from v2 authorities (all trusted directories).
35496 - Change DirServers config line to note which dirs are v1 authorities.
35497 - Add configuration option "V1AuthoritativeDirectory 1" which
35498 moria1, moria2, and tor26 should set.
35499 - Remove option when getting directory cache to see whether they
35500 support running-routers; they all do now. Replace it with one
35501 to see whether caches support v2 stuff.
35504 - Dirservers now do their own external reachability testing of each
35505 Tor server, and only list them as running if they've been found to
35506 be reachable. We also send back warnings to the server's logs if
35507 it uploads a descriptor that we already believe is unreachable.
35508 - Implement exit enclaves: if we know an IP address for the
35509 destination, and there's a running Tor server at that address
35510 which allows exit to the destination, then extend the circuit to
35511 that exit first. This provides end-to-end encryption and end-to-end
35512 authentication. Also, if the user wants a .exit address or enclave,
35513 use 4 hops rather than 3, and cannibalize a general circ for it
35515 - Permit transitioning from ORPort=0 to ORPort!=0, and back, from the
35516 controller. Also, rotate dns and cpu workers if the controller
35517 changes options that will affect them; and initialize the dns
35518 worker cache tree whether or not we start out as a server.
35519 - Only upload a new server descriptor when options change, 18
35520 hours have passed, uptime is reset, or bandwidth changes a lot.
35521 - Check [X-]Forwarded-For headers in HTTP requests when generating
35522 log messages. This lets people run dirservers (and caches) behind
35523 Apache but still know which IP addresses are causing warnings.
35525 o Config option changes:
35526 - Replace (Fascist)Firewall* config options with a new
35527 ReachableAddresses option that understands address policies.
35528 For example, "ReachableAddresses *:80,*:443"
35529 - Get rid of IgnoreVersion undocumented config option, and make us
35530 only warn, never exit, when we're running an obsolete version.
35531 - Make MonthlyAccountingStart config option truly obsolete now.
35533 o Fixes on 0.1.0.x:
35534 - Reject ports 465 and 587 in the default exit policy, since
35535 people have started using them for spam too.
35536 - It turns out we couldn't bootstrap a network since we added
35537 reachability detection in 0.1.0.1-rc. Good thing the Tor network
35538 has never gone down. Add an AssumeReachable config option to let
35539 servers and dirservers bootstrap. When we're trying to build a
35540 high-uptime or high-bandwidth circuit but there aren't enough
35541 suitable servers, try being less picky rather than simply failing.
35542 - Our logic to decide if the OR we connected to was the right guy
35543 was brittle and maybe open to a mitm for unverified routers.
35544 - We weren't cannibalizing circuits correctly for
35545 CIRCUIT_PURPOSE_C_ESTABLISH_REND and
35546 CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
35547 build those from scratch. This should make hidden services faster.
35548 - Predict required circuits better, with an eye toward making hidden
35549 services faster on the service end.
35550 - Retry streams if the exit node sends back a 'misc' failure. This
35551 should result in fewer random failures. Also, after failing
35552 from resolve failed or misc, reset the num failures, so we give
35553 it a fair shake next time we try.
35554 - Clean up the rendezvous warn log msgs, and downgrade some to info.
35555 - Reduce severity on logs about dns worker spawning and culling.
35556 - When we're shutting down and we do something like try to post a
35557 server descriptor or rendezvous descriptor, don't complain that
35558 we seem to be unreachable. Of course we are, we're shutting down.
35559 - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
35560 We don't use them yet, but maybe one day our DNS resolver will be
35561 able to discover them.
35562 - Make ContactInfo mandatory for authoritative directory servers.
35563 - Require server descriptors to list IPv4 addresses -- hostnames
35564 are no longer allowed. This also fixes some potential security
35565 problems with people providing hostnames as their address and then
35566 preferentially resolving them to partition users.
35567 - Change log line for unreachability to explicitly suggest /etc/hosts
35568 as the culprit. Also make it clearer what IP address and ports we're
35569 testing for reachability.
35570 - Put quotes around user-supplied strings when logging so users are
35571 more likely to realize if they add bad characters (like quotes)
35573 - Let auth dir servers start without specifying an Address config
35575 - Make unit tests (and other invocations that aren't the real Tor)
35576 run without launching listeners, creating subdirectories, and so on.
35579 Changes in version 0.1.1.5-alpha - 2005-08-08
35580 o Bugfixes included in 0.1.0.14.
35582 o Bugfixes on 0.1.0.x:
35583 - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
35584 torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
35585 it would silently using ignore the 6668.
35588 Changes in version 0.1.0.14 - 2005-08-08
35589 o Bugfixes on 0.1.0.x:
35590 - Fix the other half of the bug with crypto handshakes
35592 - Fix an assert trigger if you send a 'signal term' via the
35593 controller when it's listening for 'event info' messages.
35596 Changes in version 0.1.1.4-alpha - 2005-08-04
35597 o Bugfixes included in 0.1.0.13.
35600 - Improve tor_gettimeofday() granularity on windows.
35601 - Make clients regenerate their keys when their IP address changes.
35602 - Implement some more GETINFO goodness: expose helper nodes, config
35603 options, getinfo keys.
35606 Changes in version 0.1.0.13 - 2005-08-04
35607 o Bugfixes on 0.1.0.x:
35608 - Fix a critical bug in the security of our crypto handshakes.
35609 - Fix a size_t underflow in smartlist_join_strings2() that made
35610 it do bad things when you hand it an empty smartlist.
35611 - Fix Windows installer to ship Tor license (thanks to Aphex for
35612 pointing out this oversight) and put a link to the doc directory
35614 - Explicitly set no-unaligned-access for sparc: it turns out the
35615 new gcc's let you compile broken code, but that doesn't make it
35619 Changes in version 0.1.1.3-alpha - 2005-07-23
35620 o Bugfixes on 0.1.1.2-alpha:
35621 - Fix a bug in handling the controller's "post descriptor"
35623 - Fix several bugs in handling the controller's "extend circuit"
35625 - Fix a bug in handling the controller's "stream status" event.
35626 - Fix an assert failure if we have a controller listening for
35627 circuit events and we go offline.
35628 - Re-allow hidden service descriptors to publish 0 intro points.
35629 - Fix a crash when generating your hidden service descriptor if
35630 you don't have enough intro points already.
35632 o New features on 0.1.1.2-alpha:
35633 - New controller function "getinfo accounting", to ask how
35634 many bytes we've used in this time period.
35635 - Experimental support for helper nodes: a lot of the risk from
35636 a small static adversary comes because users pick new random
35637 nodes every time they rebuild a circuit. Now users will try to
35638 stick to the same small set of entry nodes if they can. Not
35639 enabled by default yet.
35641 o Bugfixes on 0.1.0.12:
35642 - If you're an auth dir server, always publish your dirport,
35643 even if you haven't yet found yourself to be reachable.
35644 - Fix a size_t underflow in smartlist_join_strings2() that made
35645 it do bad things when you hand it an empty smartlist.
35648 Changes in version 0.1.0.12 - 2005-07-18
35649 o New directory servers:
35650 - tor26 has changed IP address.
35652 o Bugfixes on 0.1.0.x:
35653 - Fix a possible double-free in tor_gzip_uncompress().
35654 - When --disable-threads is set, do not search for or link against
35655 pthreads libraries.
35656 - Don't trigger an assert if an authoritative directory server
35657 claims its dirport is 0.
35658 - Fix bug with removing Tor as an NT service: some people were
35659 getting "The service did not return an error." Thanks to Matt
35663 Changes in version 0.1.1.2-alpha - 2005-07-15
35664 o New directory servers:
35665 - tor26 has changed IP address.
35667 o Bugfixes on 0.1.0.x, crashes/leaks:
35668 - Port the servers-not-obeying-their-exit-policies fix from
35670 - Fix an fd leak in start_daemon().
35671 - On Windows, you can't always reopen a port right after you've
35672 closed it. So change retry_listeners() to only close and re-open
35673 ports that have changed.
35674 - Fix a possible double-free in tor_gzip_uncompress().
35676 o Bugfixes on 0.1.0.x, usability:
35677 - When tor_socketpair() fails in Windows, give a reasonable
35678 Windows-style errno back.
35679 - Let people type "tor --install" as well as "tor -install" when
35681 want to make it an NT service.
35682 - NT service patch from Matt Edman to improve error messages.
35683 - When the controller asks for a config option with an abbreviated
35684 name, give the full name in our response.
35685 - Correct the man page entry on TrackHostExitsExpire.
35686 - Looks like we were never delivering deflated (i.e. compressed)
35687 running-routers lists, even when asked. Oops.
35688 - When --disable-threads is set, do not search for or link against
35689 pthreads libraries.
35691 o Bugfixes on 0.1.1.x:
35692 - Fix a seg fault with autodetecting which controller version is
35696 - New hidden service descriptor format: put a version in it, and
35697 let people specify introduction/rendezvous points that aren't
35698 in "the directory" (which is subjective anyway).
35699 - Allow the DEBUG controller event to work again. Mark certain log
35700 entries as "don't tell this to controllers", so we avoid cycles.
35703 Changes in version 0.1.0.11 - 2005-06-30
35704 o Bugfixes on 0.1.0.x:
35705 - Fix major security bug: servers were disregarding their
35706 exit policies if clients behaved unexpectedly.
35707 - Make OS X init script check for missing argument, so we don't
35708 confuse users who invoke it incorrectly.
35709 - Fix a seg fault in "tor --hash-password foo".
35710 - The MAPADDRESS control command was broken.
35713 Changes in version 0.1.1.1-alpha - 2005-06-29
35715 - Make OS X init script check for missing argument, so we don't
35716 confuse users who invoke it incorrectly.
35717 - Fix a seg fault in "tor --hash-password foo".
35718 - Fix a possible way to DoS dirservers.
35719 - When we complain that your exit policy implicitly allows local or
35720 private address spaces, name them explicitly so operators can
35722 - Make the log message less scary when all the dirservers are
35723 temporarily unreachable.
35724 - We were printing the number of idle dns workers incorrectly when
35728 - Revised controller protocol (version 1) that uses ascii rather
35729 than binary. Add supporting libraries in python and java so you
35730 can use the controller from your applications without caring how
35731 our protocol works.
35732 - Spiffy new support for crypto hardware accelerators. Can somebody
35736 Changes in version 0.0.9.10 - 2005-06-16
35737 o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
35738 - Refuse relay cells that claim to have a length larger than the
35739 maximum allowed. This prevents a potential attack that could read
35740 arbitrary memory (e.g. keys) from an exit server's process
35744 Changes in version 0.1.0.10 - 2005-06-14
35745 o Allow a few EINVALs from libevent before dying. Warn on kqueue with
35746 libevent before 1.1a.
35749 Changes in version 0.1.0.9-rc - 2005-06-09
35751 - Reset buf->highwater every time buf_shrink() is called, not just on
35752 a successful shrink. This was causing significant memory bloat.
35753 - Fix buffer overflow when checking hashed passwords.
35754 - Security fix: if seeding the RNG on Win32 fails, quit.
35755 - Allow seeding the RNG on Win32 even when you're not running as
35757 - Disable threading on Solaris too. Something is wonky with it,
35758 cpuworkers, and reentrant libs.
35759 - Reenable the part of the code that tries to flush as soon as an
35760 OR outbuf has a full TLS record available. Perhaps this will make
35761 OR outbufs not grow as huge except in rare cases, thus saving lots
35762 of CPU time plus memory.
35763 - Reject malformed .onion addresses rather then passing them on as
35764 normal web requests.
35765 - Adapt patch from Adam Langley: fix possible memory leak in
35766 tor_lookup_hostname().
35767 - Initialize libevent later in the startup process, so the logs are
35768 already established by the time we start logging libevent warns.
35769 - Use correct errno on win32 if libevent fails.
35770 - Check and warn about known-bad/slow libevent versions.
35771 - Pay more attention to the ClientOnly config option.
35772 - Have torctl.in/tor.sh.in check for location of su binary (needed
35774 - Correct/add man page entries for LongLivedPorts, ExitPolicy,
35775 KeepalivePeriod, ClientOnly, NoPublish, HttpProxy, HttpsProxy,
35776 HttpProxyAuthenticator
35777 - Stop warning about sigpipes in the logs. We're going to
35778 pretend that getting these occasionally is normal and fine.
35779 - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in
35781 installer screens; and don't put stuff into StartupItems unless
35782 the user asks you to.
35783 - Require servers that use the default dirservers to have public IP
35784 addresses. We have too many servers that are configured with private
35785 IPs and their admins never notice the log entries complaining that
35786 their descriptors are being rejected.
35787 - Add OSX uninstall instructions. An actual uninstall script will
35791 Changes in version 0.1.0.8-rc - 2005-05-23
35793 - It turns out that kqueue on OS X 10.3.9 was causing kernel
35794 panics. Disable kqueue on all OS X Tors.
35795 - Fix RPM: remove duplicate line accidentally added to the rpm
35797 - Disable threads on openbsd too, since its gethostaddr is not
35799 - Tolerate libevent 0.8 since it still works, even though it's
35801 - Enable building on Red Hat 9.0 again.
35802 - Allow the middle hop of the testing circuit to be running any
35803 version, now that most of them have the bugfix to let them connect
35804 to unknown servers. This will allow reachability testing to work
35805 even when 0.0.9.7-0.0.9.9 become obsolete.
35806 - Handle relay cells with rh.length too large. This prevents
35807 a potential attack that could read arbitrary memory (maybe even
35808 keys) from the exit server's process.
35809 - We screwed up the dirport reachability testing when we don't yet
35810 have a cached version of the directory. Hopefully now fixed.
35811 - Clean up router_load_single_router() (used by the controller),
35812 so it doesn't seg fault on error.
35813 - Fix a minor memory leak when somebody establishes an introduction
35814 point at your Tor server.
35815 - If a socks connection ends because read fails, don't warn that
35816 you're not sending a socks reply back.
35819 - Add HttpProxyAuthenticator config option too, that works like
35820 the HttpsProxyAuthenticator config option.
35821 - Encode hashed controller passwords in hex instead of base64,
35822 to make it easier to write controllers.
35825 Changes in version 0.1.0.7-rc - 2005-05-17
35827 - Fix a bug in the OS X package installer that prevented it from
35828 installing on Tiger.
35829 - Fix a script bug in the OS X package installer that made it
35830 complain during installation.
35831 - Find libevent even if it's hiding in /usr/local/ and your
35832 CFLAGS and LDFLAGS don't tell you to look there.
35833 - Be able to link with libevent as a shared library (the default
35834 after 1.0d), even if it's hiding in /usr/local/lib and even
35835 if you haven't added /usr/local/lib to your /etc/ld.so.conf,
35836 assuming you're running gcc. Otherwise fail and give a useful
35838 - Fix a bug in the RPM packager: set home directory for _tor to
35839 something more reasonable when first installing.
35840 - Free a minor amount of memory that is still reachable on exit.
35843 Changes in version 0.1.0.6-rc - 2005-05-14
35845 - Implement --disable-threads configure option. Disable threads on
35846 netbsd by default, because it appears to have no reentrant resolver
35848 - Apple's OS X 10.4.0 ships with a broken kqueue. The new libevent
35849 release (1.1) detects and disables kqueue if it's broken.
35850 - Append default exit policy before checking for implicit internal
35851 addresses. Now we don't log a bunch of complaints on startup
35852 when using the default exit policy.
35853 - Some people were putting "Address " in their torrc, and they had
35854 a buggy resolver that resolved " " to 0.0.0.0. Oops.
35855 - If DataDir is ~/.tor, and that expands to /.tor, then default to
35856 LOCALSTATEDIR/tor instead.
35857 - Fix fragmented-message bug in TorControl.py.
35858 - Resolve a minor bug which would prevent unreachable dirports
35859 from getting suppressed in the published descriptor.
35860 - When the controller gave us a new descriptor, we weren't resolving
35861 it immediately, so Tor would think its address was 0.0.0.0 until
35862 we fetched a new directory.
35863 - Fix an uppercase/lowercase case error in suppressing a bogus
35864 libevent warning on some Linuxes.
35867 - Begin scrubbing sensitive strings from logs by default. Turn off
35868 the config option SafeLogging if you need to do debugging.
35869 - Switch to a new buffer management algorithm, which tries to avoid
35870 reallocing and copying quite as much. In first tests it looks like
35871 it uses *more* memory on average, but less cpu.
35872 - First cut at support for "create-fast" cells. Clients can use
35873 these when extending to their first hop, since the TLS already
35874 provides forward secrecy and authentication. Not enabled on
35876 - When dirservers refuse a router descriptor, we now log its
35877 contactinfo, platform, and the poster's IP address.
35878 - Call tor_free_all instead of connections_free_all after forking, to
35879 save memory on systems that need to fork.
35880 - Whine at you if you're a server and you don't set your contactinfo.
35881 - Implement --verify-config command-line option to check if your torrc
35882 is valid without actually launching Tor.
35883 - Rewrite address "serifos.exit" to "localhost.serifos.exit"
35884 rather than just rejecting it.
35887 Changes in version 0.1.0.5-rc - 2005-04-27
35889 - Stop trying to print a null pointer if an OR conn fails because
35890 we didn't like its cert.
35892 - Switch our internal buffers implementation to use a ring buffer,
35893 to hopefully improve performance for fast servers a lot.
35894 - Add HttpsProxyAuthenticator support (basic auth only), based
35895 on patch from Adam Langley.
35896 - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
35897 the fast servers that have been joining lately.
35898 - Give hidden service accesses extra time on the first attempt,
35899 since 60 seconds is often only barely enough. This might improve
35901 - Improve performance for dirservers: stop re-parsing the whole
35902 directory every time you regenerate it.
35903 - Add more debugging info to help us find the weird dns freebsd
35904 pthreads bug; cleaner debug messages to help track future issues.
35907 Changes in version 0.0.9.9 - 2005-04-23
35908 o Bugfixes on 0.0.9.x:
35909 - If unofficial Tor clients connect and send weird TLS certs, our
35910 Tor server triggers an assert. This release contains a minimal
35911 backport from the broader fix that we put into 0.1.0.4-rc.
35914 Changes in version 0.1.0.4-rc - 2005-04-23
35916 - If unofficial Tor clients connect and send weird TLS certs, our
35917 Tor server triggers an assert. Stop asserting, and start handling
35918 TLS errors better in other situations too.
35919 - When the controller asks us to tell it about all the debug-level
35920 logs, it turns out we were generating debug-level logs while
35921 telling it about them, which turns into a bad loop. Now keep
35922 track of whether you're sending a debug log to the controller,
35923 and don't log when you are.
35924 - Fix the "postdescriptor" feature of the controller interface: on
35925 non-complete success, only say "done" once.
35927 - Clients are now willing to load balance over up to 2mB, not 1mB,
35928 of advertised bandwidth capacity.
35929 - Add a NoPublish config option, so you can be a server (e.g. for
35930 testing running Tor servers in other Tor networks) without
35931 publishing your descriptor to the primary dirservers.
35934 Changes in version 0.1.0.3-rc - 2005-04-08
35935 o Improvements on 0.1.0.2-rc:
35936 - Client now retries when streams end early for 'hibernating' or
35937 'resource limit' reasons, rather than failing them.
35938 - More automated handling for dirserver operators:
35939 - Automatically approve nodes running 0.1.0.2-rc or later,
35940 now that the the reachability detection stuff is working.
35941 - Now we allow two unverified servers with the same nickname
35942 but different keys. But if a nickname is verified, only that
35943 nickname+key are allowed.
35944 - If you're an authdirserver connecting to an address:port,
35945 and it's not the OR you were expecting, forget about that
35946 descriptor. If he *was* the one you were expecting, then forget
35947 about all other descriptors for that address:port.
35948 - Allow servers to publish descriptors from 12 hours in the future.
35949 Corollary: only whine about clock skew from the dirserver if
35950 he's a trusted dirserver (since now even verified servers could
35951 have quite wrong clocks).
35952 - Adjust maximum skew and age for rendezvous descriptors: let skew
35953 be 48 hours rather than 90 minutes.
35954 - Efficiency improvements:
35955 - Keep a big splay tree of (circid,orconn)->circuit mappings to make
35956 it much faster to look up a circuit for each relay cell.
35957 - Remove most calls to assert_all_pending_dns_resolves_ok(),
35958 since they're eating our cpu on exit nodes.
35959 - Stop wasting time doing a case insensitive comparison for every
35960 dns name every time we do any lookup. Canonicalize the names to
35961 lowercase and be done with it.
35962 - Start sending 'truncated' cells back rather than destroy cells,
35963 if the circuit closes in front of you. This means we won't have
35964 to abandon partially built circuits.
35965 - Only warn once per nickname from add_nickname_list_to_smartlist
35966 per failure, so an entrynode or exitnode choice that's down won't
35968 - Put a note in the torrc about abuse potential with the default
35970 - Revise control spec and implementation to allow all log messages to
35971 be sent to controller with their severities intact (suggested by
35972 Matt Edman). Update TorControl to handle new log event types.
35973 - Provide better explanation messages when controller's POSTDESCRIPTOR
35975 - Stop putting nodename in the Platform string in server descriptors.
35976 It doesn't actually help, and it is confusing/upsetting some people.
35978 o Bugfixes on 0.1.0.2-rc:
35979 - We were printing the host mask wrong in exit policies in server
35980 descriptors. This isn't a critical bug though, since we were still
35981 obeying the exit policy internally.
35982 - Fix Tor when compiled with libevent but without pthreads: move
35983 connection_unregister() from _connection_free() to
35985 - Fix an assert trigger (already fixed in 0.0.9.x): when we have
35986 the rare mysterious case of accepting a conn on 0.0.0.0:0, then
35987 when we look through the connection array, we'll find any of the
35988 cpu/dnsworkers. This is no good.
35990 o Bugfixes on 0.0.9.8:
35991 - Fix possible bug on threading platforms (e.g. win32) which was
35992 leaking a file descriptor whenever a cpuworker or dnsworker died.
35993 - When using preferred entry or exit nodes, ignore whether the
35994 circuit wants uptime or capacity. They asked for the nodes, they
35996 - chdir() to your datadirectory at the *end* of the daemonize process,
35997 not the beginning. This was a problem because the first time you
35998 run tor, if your datadir isn't there, and you have runasdaemon set
35999 to 1, it will try to chdir to it before it tries to create it. Oops.
36000 - Handle changed router status correctly when dirserver reloads
36001 fingerprint file. We used to be dropping all unverified descriptors
36002 right then. The bug was hidden because we would immediately
36003 fetch a directory from another dirserver, which would include the
36004 descriptors we just dropped.
36005 - When we're connecting to an OR and he's got a different nickname/key
36006 than we were expecting, only complain loudly if we're an OP or a
36007 dirserver. Complaining loudly to the OR admins just confuses them.
36008 - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
36009 artificially capped at 500kB.
36012 Changes in version 0.0.9.8 - 2005-04-07
36013 o Bugfixes on 0.0.9.x:
36014 - We have a bug that I haven't found yet. Sometimes, very rarely,
36015 cpuworkers get stuck in the 'busy' state, even though the cpuworker
36016 thinks of itself as idle. This meant that no new circuits ever got
36017 established. Here's a workaround to kill any cpuworker that's been
36018 busy for more than 100 seconds.
36021 Changes in version 0.1.0.2-rc - 2005-04-01
36022 o Bugfixes on 0.1.0.1-rc:
36023 - Fixes on reachability detection:
36024 - Don't check for reachability while hibernating.
36025 - If ORPort is reachable but DirPort isn't, still publish the
36026 descriptor, but zero out DirPort until it's found reachable.
36027 - When building testing circs for ORPort testing, use only
36028 high-bandwidth nodes, so fewer circuits fail.
36029 - Complain about unreachable ORPort separately from unreachable
36030 DirPort, so the user knows what's going on.
36031 - Make sure we only conclude ORPort reachability if we didn't
36032 initiate the conn. Otherwise we could falsely conclude that
36033 we're reachable just because we connected to the guy earlier
36034 and he used that same pipe to extend to us.
36035 - Authdirservers shouldn't do ORPort reachability detection,
36036 since they're in clique mode, so it will be rare to find a
36037 server not already connected to them.
36038 - When building testing circuits, always pick middle hops running
36039 Tor 0.0.9.7, so we avoid the "can't extend to unknown routers"
36040 bug. (This is a kludge; it will go away when 0.0.9.x becomes
36042 - When we decide we're reachable, actually publish our descriptor
36044 - Fix bug in redirectstream in the controller.
36045 - Fix the state descriptor strings so logs don't claim edge streams
36046 are in a different state than they actually are.
36047 - Use recent libevent features when possible (this only really affects
36048 win32 and osx right now, because the new libevent with these
36049 features hasn't been released yet). Add code to suppress spurious
36051 - Prevent possible segfault in connection_close_unattached_ap().
36052 - Fix newlines on torrc in win32.
36053 - Improve error msgs when tor-resolve fails.
36055 o Improvements on 0.0.9.x:
36056 - New experimental script tor/contrib/ExerciseServer.py (needs more
36057 work) that uses the controller interface to build circuits and
36058 fetch pages over them. This will help us bootstrap servers that
36059 have lots of capacity but haven't noticed it yet.
36060 - New experimental script tor/contrib/PathDemo.py (needs more work)
36061 that uses the controller interface to let you choose whole paths
36063 "<hostname>.<path,separated by dots>.<length of path>.path"
36064 - When we've connected to an OR and handshaked but didn't like
36065 the result, we were closing the conn without sending destroy
36066 cells back for pending circuits. Now send those destroys.
36069 Changes in version 0.0.9.7 - 2005-04-01
36070 o Bugfixes on 0.0.9.x:
36071 - Fix another race crash bug (thanks to Glenn Fink for reporting).
36072 - Compare identity to identity, not to nickname, when extending to
36073 a router not already in the directory. This was preventing us from
36074 extending to unknown routers. Oops.
36075 - Make sure to create OS X Tor user in <500 range, so we aren't
36076 creating actual system users.
36077 - Note where connection-that-hasn't-sent-end was marked, and fix
36078 a few really loud instances of this harmless bug (it's fixed more
36082 Changes in version 0.1.0.1-rc - 2005-03-28
36084 - Add reachability testing. Your Tor server will automatically try
36085 to see if its ORPort and DirPort are reachable from the outside,
36086 and it won't upload its descriptor until it decides they are.
36087 - Handle unavailable hidden services better. Handle slow or busy
36088 hidden services better.
36089 - Add support for CONNECTing through https proxies, with "HttpsProxy"
36091 - New exit policy: accept most low-numbered ports, rather than
36092 rejecting most low-numbered ports.
36093 - More Tor controller support (still experimental). See
36094 http://tor.eff.org/doc/control-spec.txt for all the new features,
36095 including signals to emulate unix signals from any platform;
36096 redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
36097 closestream; closecircuit; etc.
36098 - Make nt services work and start on startup on win32 (based on
36099 patch by Matt Edman).
36100 - Add a new AddressMap config directive to rewrite incoming socks
36101 addresses. This lets you, for example, declare an implicit
36102 required exit node for certain sites.
36103 - Add a new TrackHostExits config directive to trigger addressmaps
36104 for certain incoming socks addresses -- for sites that break when
36105 your exit keeps changing (based on patch by Mike Perry).
36106 - Redo the client-side dns cache so it's just an addressmap too.
36107 - Notice when our IP changes, and reset stats/uptime/reachability.
36108 - When an application is using socks5, give him the whole variety of
36109 potential socks5 responses (connect refused, host unreachable, etc),
36110 rather than just "success" or "failure".
36111 - A more sane version numbering system. See
36112 http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
36113 - New contributed script "exitlist": a simple python script to
36114 parse directories and find Tor nodes that exit to listed
36116 - New contributed script "privoxy-tor-toggle" to toggle whether
36117 Privoxy uses Tor. Seems to be configured for Debian by default.
36118 - Report HTTP reasons to client when getting a response from directory
36119 servers -- so you can actually know what went wrong.
36120 - New config option MaxAdvertisedBandwidth which lets you advertise
36121 a low bandwidthrate (to not attract as many circuits) while still
36122 allowing a higher bandwidthrate in reality.
36124 o Robustness/stability fixes:
36125 - Make Tor use Niels Provos's libevent instead of its current
36126 poll-but-sometimes-select mess. This will let us use faster async
36127 cores (like epoll, kpoll, and /dev/poll), and hopefully work better
36129 - pthread support now too. This was forced because when we forked,
36130 we ended up wasting a lot of duplicate ram over time. Also switch
36131 to foo_r versions of some library calls to allow reentry and
36133 - Better handling for heterogeneous / unreliable nodes:
36134 - Annotate circuits w/ whether they aim to contain high uptime nodes
36135 and/or high capacity nodes. When building circuits, choose
36137 - This means that every single node in an intro rend circuit,
36138 not just the last one, will have a minimum uptime.
36139 - New config option LongLivedPorts to indicate application streams
36140 that will want high uptime circuits.
36141 - Servers reset uptime when a dir fetch entirely fails. This
36142 hopefully reflects stability of the server's network connectivity.
36143 - If somebody starts his tor server in Jan 2004 and then fixes his
36144 clock, don't make his published uptime be a year.
36145 - Reset published uptime when you wake up from hibernation.
36146 - Introduce a notion of 'internal' circs, which are chosen without
36147 regard to the exit policy of the last hop. Intro and rendezvous
36148 circs must be internal circs, to avoid leaking information. Resolve
36149 and connect streams can use internal circs if they want.
36150 - New circuit pooling algorithm: make sure to have enough circs around
36151 to satisfy any predicted ports, and also make sure to have 2 internal
36152 circs around if we've required internal circs lately (and with high
36153 uptime if we've seen that lately too).
36154 - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
36155 which describes how often we retry making new circuits if current
36156 ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
36157 how long we're willing to make use of an already-dirty circuit.
36158 - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
36159 circ as necessary, if there are any completed ones lying around
36160 when we try to launch one.
36161 - Make hidden services try to establish a rendezvous for 30 seconds,
36162 rather than for n (where n=3) attempts to build a circuit.
36163 - Change SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to a config option
36164 "ShutdownWaitLength".
36165 - Try to be more zealous about calling connection_edge_end when
36166 things go bad with edge conns in connection.c.
36167 - Revise tor-spec to add more/better stream end reasons.
36168 - Revise all calls to connection_edge_end to avoid sending "misc",
36169 and to take errno into account where possible.
36172 - Fix a race condition that can trigger an assert, when we have a
36173 pending create cell and an OR connection fails right then.
36174 - Fix several double-mark-for-close bugs, e.g. where we were finding
36175 a conn for a cell even if that conn is already marked for close.
36176 - Make sequence of log messages when starting on win32 with no config
36177 file more reasonable.
36178 - When choosing an exit node for a new non-internal circ, don't take
36179 into account whether it'll be useful for any pending x.onion
36180 addresses -- it won't.
36181 - Turn addr_policy_compare from a tristate to a quadstate; this should
36182 help address our "Ah, you allow 1.2.3.4:80. You are a good choice
36183 for google.com" problem.
36184 - Make "platform" string in descriptor more accurate for Win32 servers,
36185 so it's not just "unknown platform".
36186 - Fix an edge case in parsing config options (thanks weasel).
36187 If they say "--" on the commandline, it's not an option.
36188 - Reject odd-looking addresses at the client (e.g. addresses that
36189 contain a colon), rather than having the server drop them because
36191 - tor-resolve requests were ignoring .exit if there was a working circuit
36192 they could use instead.
36193 - REUSEADDR on normal platforms means you can rebind to the port
36194 right after somebody else has let it go. But REUSEADDR on win32
36195 means to let you bind to the port _even when somebody else
36196 already has it bound_! So, don't do that on Win32.
36197 - Change version parsing logic: a version is "obsolete" if it is not
36198 recommended and (1) there is a newer recommended version in the
36199 same series, or (2) there are no recommended versions in the same
36200 series, but there are some recommended versions in a newer series.
36201 A version is "new" if it is newer than any recommended version in
36203 - Stop most cases of hanging up on a socks connection without sending
36207 - Require BandwidthRate to be at least 20kB/s for servers.
36208 - When a dirserver causes you to give a warn, mention which dirserver
36210 - New config option DirAllowPrivateAddresses for authdirservers.
36211 Now by default they refuse router descriptors that have non-IP or
36212 private-IP addresses.
36213 - Stop publishing socksport in the directory, since it's not
36214 actually meant to be public. For compatibility, publish a 0 there
36216 - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
36217 smart" value, that is low for servers and high for clients.
36218 - If our clock jumps forward by 100 seconds or more, assume something
36219 has gone wrong with our network and abandon all not-yet-used circs.
36220 - Warn when exit policy implicitly allows local addresses.
36221 - If we get an incredibly skewed timestamp from a dirserver mirror
36222 that isn't a verified OR, don't warn -- it's probably him that's
36224 - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
36225 cookies to disk and doesn't log each web request to disk. (Thanks
36226 to Brett Carrington for pointing this out.)
36227 - When a client asks us for a dir mirror and we don't have one,
36228 launch an attempt to get a fresh one.
36229 - If we're hibernating and we get a SIGINT, exit immediately.
36230 - Add --with-dmalloc ./configure option, to track memory leaks.
36231 - And try to free all memory on closing, so we can detect what
36233 - Cache local dns resolves correctly even when they're .exit
36235 - Give a better warning when some other server advertises an
36236 ORPort that is actually an apache running ssl.
36237 - Add "opt hibernating 1" to server descriptor to make it clearer
36238 whether the server is hibernating.
36241 Changes in version 0.0.9.6 - 2005-03-24
36242 o Bugfixes on 0.0.9.x (crashes and asserts):
36243 - Add new end stream reasons to maintenance branch. Fix bug where
36244 reason (8) could trigger an assert. Prevent bug from recurring.
36245 - Apparently win32 stat wants paths to not end with a slash.
36246 - Fix assert triggers in assert_cpath_layer_ok(), where we were
36247 blowing away the circuit that conn->cpath_layer points to, then
36248 checking to see if the circ is well-formed. Backport check to make
36249 sure we dont use the cpath on a closed connection.
36250 - Prevent circuit_resume_edge_reading_helper() from trying to package
36251 inbufs for marked-for-close streams.
36252 - Don't crash on hup if your options->address has become unresolvable.
36253 - Some systems (like OS X) sometimes accept() a connection and tell
36254 you the remote host is 0.0.0.0:0. If this happens, due to some
36255 other mis-features, we get confused; so refuse the conn for now.
36257 o Bugfixes on 0.0.9.x (other):
36258 - Fix harmless but scary "Unrecognized content encoding" warn message.
36259 - Add new stream error reason: TORPROTOCOL reason means "you are not
36260 speaking a version of Tor I understand; say bye-bye to your stream."
36261 - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
36262 into the future, now that we are more tolerant of skew. This
36263 resolves a bug where a Tor server would refuse to cache a directory
36264 because all the directories it gets are too far in the future;
36265 yet the Tor server never logs any complaints about clock skew.
36266 - Mac packaging magic: make man pages useable, and do not overwrite
36267 existing torrc files.
36268 - Make OS X log happily to /var/log/tor/tor.log
36271 Changes in version 0.0.9.5 - 2005-02-22
36272 o Bugfixes on 0.0.9.x:
36273 - Fix an assert race at exit nodes when resolve requests fail.
36274 - Stop picking unverified dir mirrors--it only leads to misery.
36275 - Patch from Matt Edman to make NT services work better. Service
36276 support is still not compiled into the executable by default.
36277 - Patch from Dmitri Bely so the Tor service runs better under
36278 the win32 SYSTEM account.
36279 - Make tor-resolve actually work (?) on Win32.
36280 - Fix a sign bug when getrlimit claims to have 4+ billion
36281 file descriptors available.
36282 - Stop refusing to start when bandwidthburst == bandwidthrate.
36283 - When create cells have been on the onion queue more than five
36284 seconds, just send back a destroy and take them off the list.
36287 Changes in version 0.0.9.4 - 2005-02-03
36288 o Bugfixes on 0.0.9:
36289 - Fix an assert bug that took down most of our servers: when
36290 a server claims to have 1 GB of bandwidthburst, don't
36292 - Don't crash as badly if we have spawned the max allowed number
36293 of dnsworkers, or we're out of file descriptors.
36294 - Block more file-sharing ports in the default exit policy.
36295 - MaxConn is now automatically set to the hard limit of max
36296 file descriptors we're allowed (ulimit -n), minus a few for
36298 - Give a clearer message when servers need to raise their
36299 ulimit -n when they start running out of file descriptors.
36300 - SGI Compatibility patches from Jan Schaumann.
36301 - Tolerate a corrupt cached directory better.
36302 - When a dirserver hasn't approved your server, list which one.
36303 - Go into soft hibernation after 95% of the bandwidth is used,
36304 not 99%. This is especially important for daily hibernators who
36305 have a small accounting max. Hopefully it will result in fewer
36306 cut connections when the hard hibernation starts.
36307 - Load-balance better when using servers that claim more than
36308 800kB/s of capacity.
36309 - Make NT services work (experimental, only used if compiled in).
36312 Changes in version 0.0.9.3 - 2005-01-21
36313 o Bugfixes on 0.0.9:
36314 - Backport the cpu use fixes from main branch, so busy servers won't
36315 need as much processor time.
36316 - Work better when we go offline and then come back, or when we
36317 run Tor at boot before the network is up. We do this by
36318 optimistically trying to fetch a new directory whenever an
36319 application request comes in and we think we're offline -- the
36320 human is hopefully a good measure of when the network is back.
36321 - Backport some minimal hidserv bugfixes: keep rend circuits open as
36322 long as you keep using them; actually publish hidserv descriptors
36323 shortly after they change, rather than waiting 20-40 minutes.
36324 - Enable Mac startup script by default.
36325 - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
36326 - When you update AllowUnverifiedNodes or FirewallPorts via the
36327 controller's setconf feature, we were always appending, never
36329 - When you update HiddenServiceDir via setconf, it was screwing up
36330 the order of reading the lines, making it fail.
36331 - Do not rewrite a cached directory back to the cache; otherwise we
36332 will think it is recent and not fetch a newer one on startup.
36333 - Workaround for webservers that lie about Content-Encoding: Tor
36334 now tries to autodetect compressed directories and compression
36335 itself. This lets us Proxypass dir fetches through apache.
36338 Changes in version 0.0.9.2 - 2005-01-04
36339 o Bugfixes on 0.0.9 (crashes and asserts):
36340 - Fix an assert on startup when the disk is full and you're logging
36342 - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
36343 style address, then we'd crash.
36344 - Fix an assert trigger when the running-routers string we get from
36345 a dirserver is broken.
36346 - Make worker threads start and run on win32. Now win32 servers
36348 - Bandaid (not actually fix, but now it doesn't crash) an assert
36349 where the dns worker dies mysteriously and the main Tor process
36350 doesn't remember anything about the address it was resolving.
36352 o Bugfixes on 0.0.9 (Win32):
36353 - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
36354 name out of the warning/assert messages.
36355 - Fix a superficial "unhandled error on read" bug on win32.
36356 - The win32 installer no longer requires a click-through for our
36357 license, since our Free Software license grants rights but does not
36359 - Win32: When connecting to a dirserver fails, try another one
36360 immediately. (This was already working for non-win32 Tors.)
36361 - Stop trying to parse $HOME on win32 when hunting for default
36363 - Make tor-resolve.c work on win32 by calling network_init().
36365 o Bugfixes on 0.0.9 (other):
36366 - Make 0.0.9.x build on Solaris again.
36367 - Due to a fencepost error, we were blowing away the \n when reporting
36368 confvalue items in the controller. So asking for multiple config
36369 values at once couldn't work.
36370 - When listing circuits that are pending on an opening OR connection,
36371 if we're an OR we were listing circuits that *end* at us as
36372 being pending on every listener, dns/cpu worker, etc. Stop that.
36373 - Dirservers were failing to create 'running-routers' or 'directory'
36374 strings if we had more than some threshold of routers. Fix them so
36375 they can handle any number of routers.
36376 - Fix a superficial "Duplicate mark for close" bug.
36377 - Stop checking for clock skew for OR connections, even for servers.
36378 - Fix a fencepost error that was chopping off the last letter of any
36379 nickname that is the maximum allowed nickname length.
36380 - Update URLs in log messages so they point to the new website.
36381 - Fix a potential problem in mangling server private keys while
36382 writing to disk (not triggered yet, as far as we know).
36383 - Include the licenses for other free software we include in Tor,
36384 now that we're shipping binary distributions more regularly.
36387 Changes in version 0.0.9.1 - 2004-12-15
36388 o Bugfixes on 0.0.9:
36389 - Make hibernation actually work.
36390 - Make HashedControlPassword config option work.
36391 - When we're reporting event circuit status to a controller,
36392 don't use the stream status code.
36395 Changes in version 0.0.9 - 2004-12-12
36397 - Clean up manpage and torrc.sample file.
36398 - Clean up severities and text of log warnings.
36400 - Make servers trigger an assert when they enter hibernation.
36403 Changes in version 0.0.9rc7 - 2004-12-08
36404 o Bugfixes on 0.0.9rc:
36405 - Fix a stack-trashing crash when an exit node begins hibernating.
36406 - Avoid looking at unallocated memory while considering which
36407 ports we need to build circuits to cover.
36408 - Stop a sigpipe: when an 'end' cell races with eof from the app,
36409 we shouldn't hold-open-until-flush if the eof arrived first.
36410 - Fix a bug with init_cookie_authentication() in the controller.
36411 - When recommending new-format log lines, if the upper bound is
36412 LOG_ERR, leave it implicit.
36414 o Bugfixes on 0.0.8.1:
36415 - Fix a whole slew of memory leaks.
36416 - Fix isspace() and friends so they still make Solaris happy
36417 but also so they don't trigger asserts on win32.
36418 - Fix parse_iso_time on platforms without strptime (eg win32).
36419 - win32: tolerate extra "readable" events better.
36420 - win32: when being multithreaded, leave parent fdarray open.
36421 - Make unit tests work on win32.
36424 Changes in version 0.0.9rc6 - 2004-12-06
36425 o Bugfixes on 0.0.9pre:
36426 - Clean up some more integer underflow opportunities (not exploitable
36428 - While hibernating, hup should not regrow our listeners.
36429 - Send an end to the streams we close when we hibernate, rather
36430 than just chopping them off.
36431 - React to eof immediately on non-open edge connections.
36433 o Bugfixes on 0.0.8.1:
36434 - Calculate timeout for waiting for a connected cell from the time
36435 we sent the begin cell, not from the time the stream started. If
36436 it took a long time to establish the circuit, we would time out
36437 right after sending the begin cell.
36438 - Fix router_compare_addr_to_addr_policy: it was not treating a port
36439 of * as always matching, so we were picking reject *:* nodes as
36440 exit nodes too. Oops.
36443 - New circuit building strategy: keep a list of ports that we've
36444 used in the past 6 hours, and always try to have 2 circuits open
36445 or on the way that will handle each such port. Seed us with port
36446 80 so web users won't complain that Tor is "slow to start up".
36447 - Make kill -USR1 dump more useful stats about circuits.
36448 - When warning about retrying or giving up, print the address, so
36449 the user knows which one it's talking about.
36450 - If you haven't used a clean circuit in an hour, throw it away,
36451 just to be on the safe side. (This means after 6 hours a totally
36452 unused Tor client will have no circuits open.)
36455 Changes in version 0.0.9rc5 - 2004-12-01
36456 o Bugfixes on 0.0.8.1:
36457 - Disallow NDEBUG. We don't ever want anybody to turn off debug.
36458 - Let resolve conns retry/expire also, rather than sticking around
36460 - If we are using select, make sure we stay within FD_SETSIZE.
36462 o Bugfixes on 0.0.9pre:
36463 - Fix integer underflow in tor_vsnprintf() that may be exploitable,
36464 but doesn't seem to be currently; thanks to Ilja van Sprundel for
36466 - If anybody set DirFetchPostPeriod, give them StatusFetchPeriod
36467 instead. Impose minima and maxima for all *Period options; impose
36468 even tighter maxima for fetching if we are a caching dirserver.
36469 Clip rather than rejecting.
36470 - Fetch cached running-routers from servers that serve it (that is,
36471 authdirservers and servers running 0.0.9rc5-cvs or later.)
36474 - Accept *:706 (silc) in default exit policy.
36475 - Implement new versioning format for post 0.1.
36476 - Support "foo.nickname.exit" addresses, to let Alice request the
36477 address "foo" as viewed by exit node "nickname". Based on a patch
36479 - Make tor --version --version dump the cvs Id of every file.
36482 Changes in version 0.0.9rc4 - 2004-11-28
36483 o Bugfixes on 0.0.8.1:
36484 - Make windows sockets actually non-blocking (oops), and handle
36485 win32 socket errors better.
36487 o Bugfixes on 0.0.9rc1:
36488 - Actually catch the -USR2 signal.
36491 Changes in version 0.0.9rc3 - 2004-11-25
36492 o Bugfixes on 0.0.8.1:
36493 - Flush the log file descriptor after we print "Tor opening log file",
36494 so we don't see those messages days later.
36496 o Bugfixes on 0.0.9rc1:
36497 - Make tor-resolve work again.
36498 - Avoid infinite loop in tor-resolve if tor hangs up on it.
36499 - Fix an assert trigger for clients/servers handling resolves.
36502 Changes in version 0.0.9rc2 - 2004-11-24
36503 o Bugfixes on 0.0.9rc1:
36504 - I broke socks5 support while fixing the eof bug.
36505 - Allow unitless bandwidths and intervals; they default to bytes
36507 - New servers don't start out hibernating; they are active until
36508 they run out of bytes, so they have a better estimate of how
36509 long it takes, and so their operators can know they're working.
36512 Changes in version 0.0.9rc1 - 2004-11-23
36513 o Bugfixes on 0.0.8.1:
36514 - Finally fix a bug that's been plaguing us for a year:
36515 With high load, circuit package window was reaching 0. Whenever
36516 we got a circuit-level sendme, we were reading a lot on each
36517 socket, but only writing out a bit. So we would eventually reach
36518 eof. This would be noticed and acted on even when there were still
36519 bytes sitting in the inbuf.
36520 - When poll() is interrupted, we shouldn't believe the revents values.
36522 o Bugfixes on 0.0.9pre6:
36523 - Fix hibernate bug that caused pre6 to be broken.
36524 - Don't keep rephist info for routers that haven't had activity for
36525 24 hours. (This matters now that clients have keys, since we track
36527 - Never call close_temp_logs while validating log options.
36528 - Fix backslash-escaping on tor.sh.in and torctl.in.
36531 - Implement weekly/monthly/daily accounting: now you specify your
36532 hibernation properties by
36533 AccountingMax N bytes|KB|MB|GB|TB
36534 AccountingStart day|week|month [day] HH:MM
36535 Defaults to "month 1 0:00".
36536 - Let bandwidth and interval config options be specified as 5 bytes,
36537 kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
36538 - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
36539 get back to normal.)
36540 - If your requested entry or exit node has advertised bandwidth 0,
36542 - Be more greedy about filling up relay cells -- we try reading again
36543 once we've processed the stuff we read, in case enough has arrived
36544 to fill the last cell completely.
36545 - Apply NT service patch from Osamu Fujino. Still needs more work.
36548 Changes in version 0.0.9pre6 - 2004-11-15
36549 o Bugfixes on 0.0.8.1:
36550 - Fix assert failure on malformed socks4a requests.
36551 - Use identity comparison, not nickname comparison, to choose which
36552 half of circuit-ID-space each side gets to use. This is needed
36553 because sometimes we think of a router as a nickname, and sometimes
36554 as a hex ID, and we can't predict what the other side will do.
36555 - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
36556 write() call will fail and we handle it there.
36557 - Add a FAST_SMARTLIST define to optionally inline smartlist_get
36558 and smartlist_len, which are two major profiling offenders.
36560 o Bugfixes on 0.0.9pre5:
36561 - Fix a bug in read_all that was corrupting config files on windows.
36562 - When we're raising the max number of open file descriptors to
36563 'unlimited', don't log that we just raised it to '-1'.
36564 - Include event code with events, as required by control-spec.txt.
36565 - Don't give a fingerprint when clients do --list-fingerprint:
36566 it's misleading, because it will never be the same again.
36567 - Stop using strlcpy in tor_strndup, since it was slowing us
36569 - Remove warn on startup about missing cached-directory file.
36570 - Make kill -USR1 work again.
36571 - Hibernate if we start tor during the "wait for wakeup-time" phase
36572 of an accounting interval. Log our hibernation plans better.
36573 - Authoritative dirservers now also cache their directory, so they
36574 have it on start-up.
36577 - Fetch running-routers; cache running-routers; compress
36578 running-routers; serve compressed running-routers.z
36579 - Add NSI installer script contributed by J Doe.
36580 - Commit VC6 and VC7 workspace/project files.
36581 - Commit a tor.spec for making RPM files, with help from jbash.
36582 - Add contrib/torctl.in contributed by Glenn Fink.
36583 - Implement the control-spec's SAVECONF command, to write your
36584 configuration to torrc.
36585 - Get cookie authentication for the controller closer to working.
36586 - Include control-spec.txt in the tarball.
36587 - When set_conf changes our server descriptor, upload a new copy.
36588 But don't upload it too often if there are frequent changes.
36589 - Document authentication config in man page, and document signals
36591 - Clean up confusing parts of man page and torrc.sample.
36592 - Make expand_filename handle ~ and ~username.
36593 - Use autoconf to enable largefile support where necessary. Use
36594 ftello where available, since ftell can fail at 2GB.
36595 - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
36596 log more informatively.
36597 - Give a slightly more useful output for "tor -h".
36598 - Refuse application socks connections to port 0.
36599 - Check clock skew for verified servers, but allow unverified
36600 servers and clients to have any clock skew.
36601 - Break DirFetchPostPeriod into:
36602 - DirFetchPeriod for fetching full directory,
36603 - StatusFetchPeriod for fetching running-routers,
36604 - DirPostPeriod for posting server descriptor,
36605 - RendPostPeriod for posting hidden service descriptors.
36606 - Make sure the hidden service descriptors are at a random offset
36607 from each other, to hinder linkability.
36610 Changes in version 0.0.9pre5 - 2004-11-09
36611 o Bugfixes on 0.0.9pre4:
36612 - Fix a seg fault in unit tests (doesn't affect main program).
36613 - Fix an assert bug where a hidden service provider would fail if
36614 the first hop of his rendezvous circuit was down.
36615 - Hidden service operators now correctly handle version 1 style
36616 INTRODUCE1 cells (nobody generates them still, so not a critical
36618 - If do_hup fails, actually notice.
36619 - Handle more errnos from accept() without closing the listener.
36620 Some OpenBSD machines were closing their listeners because
36621 they ran out of file descriptors.
36622 - Send resolve cells to exit routers that are running a new
36623 enough version of the resolve code to work right.
36624 - Better handling of winsock includes on non-MSV win32 compilers.
36625 - Some people had wrapped their tor client/server in a script
36626 that would restart it whenever it died. This did not play well
36627 with our "shut down if your version is obsolete" code. Now people
36628 don't fetch a new directory if their local cached version is
36630 - Make our autogen.sh work on ksh as well as bash.
36633 - Hibernation: New config option "AccountingMaxKB" lets you
36634 set how many KBytes per month you want to allow your server to
36635 consume. Rather than spreading those bytes out evenly over the
36636 month, we instead hibernate for some of the month and pop up
36637 at a deterministic time, work until the bytes are consumed, then
36638 hibernate again. Config option "MonthlyAccountingStart" lets you
36639 specify which day of the month your billing cycle starts on.
36640 - Control interface: a separate program can now talk to your
36641 client/server over a socket, and get/set config options, receive
36642 notifications of circuits and streams starting/finishing/dying,
36643 bandwidth used, etc. The next step is to get some GUIs working.
36644 Let us know if you want to help out. See doc/control-spec.txt .
36645 - Ship a contrib/tor-control.py as an example script to interact
36646 with the control port.
36647 - "tor --hash-password zzyxz" will output a salted password for
36648 use in authenticating to the control interface.
36649 - New log format in config:
36650 "Log minsev[-maxsev] stdout|stderr|syslog" or
36651 "Log minsev[-maxsev] file /var/foo"
36654 - DirPolicy config option, to let people reject incoming addresses
36655 from their dirserver.
36656 - "tor --list-fingerprint" will list your identity key fingerprint
36658 - Add "pass" target for RedirectExit, to make it easier to break
36659 out of a sequence of RedirectExit rules.
36660 - Clients now generate a TLS cert too, in preparation for having
36661 them act more like real nodes.
36662 - Ship src/win32/ in the tarball, so people can use it to build.
36663 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
36665 - New "router-status" line in directory, to better bind each verified
36666 nickname to its identity key.
36667 - Deprecate unofficial config option abbreviations, and abbreviations
36668 not on the command line.
36669 - Add a pure-C tor-resolve implementation.
36670 - Use getrlimit and friends to ensure we can reach MaxConn (currently
36671 1024) file descriptors.
36673 o Code security improvements, inspired by Ilja:
36674 - Replace sprintf with snprintf. (I think they were all safe, but
36676 - Replace strcpy/strncpy with strlcpy in more places.
36677 - Avoid strcat; use snprintf or strlcat instead.
36678 - snprintf wrapper with consistent (though not C99) overflow behavior.
36681 Changes in version 0.0.9pre4 - 2004-10-17
36682 o Bugfixes on 0.0.9pre3:
36683 - If the server doesn't specify an exit policy, use the real default
36684 exit policy, not reject *:*.
36685 - Ignore fascistfirewall when uploading/downloading hidden service
36686 descriptors, since we go through Tor for those; and when using
36687 an HttpProxy, since we assume it can reach them all.
36688 - When looking for an authoritative dirserver, use only the ones
36689 configured at boot. Don't bother looking in the directory.
36690 - The rest of the fix for get_default_conf_file() on older win32.
36691 - Make 'Routerfile' config option obsolete.
36694 - New 'MyFamily nick1,...' config option for a server to
36695 specify other servers that shouldn't be used in the same circuit
36696 with it. Only believed if nick1 also specifies us.
36697 - New 'NodeFamily nick1,nick2,...' config option for a client to
36698 specify nodes that it doesn't want to use in the same circuit.
36699 - New 'Redirectexit pattern address:port' config option for a
36700 server to redirect exit connections, e.g. to a local squid.
36703 Changes in version 0.0.9pre3 - 2004-10-13
36704 o Bugfixes on 0.0.8.1:
36705 - Better torrc example lines for dirbindaddress and orbindaddress.
36706 - Improved bounds checking on parsed ints (e.g. config options and
36707 the ones we find in directories.)
36708 - Better handling of size_t vs int, so we're more robust on 64
36710 - Fix the rest of the bug where a newly started OR would appear
36711 as unverified even after we've added his fingerprint and hupped
36713 - Fix a bug from 0.0.7: when read() failed on a stream, we would
36714 close it without sending back an end. So 'connection refused'
36715 would simply be ignored and the user would get no response.
36717 o Bugfixes on 0.0.9pre2:
36718 - Serving the cached-on-disk directory to people is bad. We now
36719 provide no directory until we've fetched a fresh one.
36720 - Workaround for bug on windows where cached-directories get crlf
36722 - Make get_default_conf_file() work on older windows too.
36723 - If we write a *:* exit policy line in the descriptor, don't write
36724 any more exit policy lines.
36727 - Use only 0.0.9pre1 and later servers for resolve cells.
36728 - Make the dirservers file obsolete.
36729 - Include a dir-signing-key token in directories to tell the
36730 parsing entity which key is being used to sign.
36731 - Remove the built-in bulky default dirservers string.
36732 - New config option "Dirserver %s:%d [fingerprint]", which can be
36733 repeated as many times as needed. If no dirservers specified,
36734 default to moria1,moria2,tor26.
36735 - Make moria2 advertise a dirport of 80, so people behind firewalls
36736 will be able to get a directory.
36737 - Http proxy support
36738 - Dirservers translate requests for http://%s:%d/x to /x
36739 - You can specify "HttpProxy %s[:%d]" and all dir fetches will
36740 be routed through this host.
36741 - Clients ask for /tor/x rather than /x for new enough dirservers.
36742 This way we can one day coexist peacefully with apache.
36743 - Clients specify a "Host: %s%d" http header, to be compatible
36744 with more proxies, and so running squid on an exit node can work.
36747 Changes in version 0.0.8.1 - 2004-10-13
36749 - Fix a seg fault that can be triggered remotely for Tor
36750 clients/servers with an open dirport.
36751 - Fix a rare assert trigger, where routerinfos for entries in
36752 our cpath would expire while we're building the path.
36753 - Fix a bug in OutboundBindAddress so it (hopefully) works.
36754 - Fix a rare seg fault for people running hidden services on
36755 intermittent connections.
36756 - Fix a bug in parsing opt keywords with objects.
36757 - Fix a stale pointer assert bug when a stream detaches and
36759 - Fix a string format vulnerability (probably not exploitable)
36760 in reporting stats locally.
36761 - Fix an assert trigger: sometimes launching circuits can fail
36762 immediately, e.g. because too many circuits have failed recently.
36763 - Fix a compile warning on 64 bit platforms.
36766 Changes in version 0.0.9pre2 - 2004-10-03
36768 - Make fetching a cached directory work for 64-bit platforms too.
36769 - Make zlib.h a required header, not an optional header.
36772 Changes in version 0.0.9pre1 - 2004-10-01
36774 - Stop using separate defaults for no-config-file and
36775 empty-config-file. Now you have to explicitly turn off SocksPort,
36776 if you don't want it open.
36777 - Fix a bug in OutboundBindAddress so it (hopefully) works.
36778 - Improve man page to mention more of the 0.0.8 features.
36779 - Fix a rare seg fault for people running hidden services on
36780 intermittent connections.
36781 - Change our file IO stuff (especially wrt OpenSSL) so win32 is
36783 - Fix more dns related bugs: send back resolve_failed and end cells
36784 more reliably when the resolve fails, rather than closing the
36785 circuit and then trying to send the cell. Also attach dummy resolve
36786 connections to a circuit *before* calling dns_resolve(), to fix
36787 a bug where cached answers would never be sent in RESOLVED cells.
36788 - When we run out of disk space, or other log writing error, don't
36789 crash. Just stop logging to that log and continue.
36790 - We were starting to daemonize before we opened our logs, so if
36791 there were any problems opening logs, we would complain to stderr,
36792 which wouldn't work, and then mysteriously exit.
36793 - Fix a rare bug where sometimes a verified OR would connect to us
36794 before he'd uploaded his descriptor, which would cause us to
36795 assign conn->nickname as though he's unverified. Now we look through
36796 the fingerprint list to see if he's there.
36797 - Fix a rare assert trigger, where routerinfos for entries in
36798 our cpath would expire while we're building the path.
36801 - Clients can ask dirservers for /dir.z to get a compressed version
36802 of the directory. Only works for servers running 0.0.9, of course.
36803 - Make clients cache directories and use them to seed their router
36804 lists at startup. This means clients have a datadir again.
36805 - Configuration infrastructure support for warning on obsolete
36807 - Respond to content-encoding headers by trying to uncompress as
36809 - Reply with a deflated directory when a client asks for "dir.z".
36810 We could use allow-encodings instead, but allow-encodings isn't
36811 specified in HTTP 1.0.
36812 - Raise the max dns workers from 50 to 100.
36813 - Discourage people from setting their dirfetchpostperiod more often
36814 than once per minute.
36815 - Protect dirservers from overzealous descriptor uploading -- wait
36816 10 seconds after directory gets dirty, before regenerating.
36819 Changes in version 0.0.8 - 2004-08-25
36820 o Port it to SunOS 5.9 / Athena
36823 Changes in version 0.0.8rc2 - 2004-08-20
36824 o Make it compile on cygwin again.
36825 o When picking unverified routers, skip those with low uptime and/or
36826 low bandwidth, depending on what properties you care about.
36829 Changes in version 0.0.8rc1 - 2004-08-18
36830 o Changes from 0.0.7.3:
36832 - Fix assert triggers: if the other side returns an address 0.0.0.0,
36833 don't put it into the client dns cache.
36834 - If a begin failed due to exit policy, but we believe the IP address
36835 should have been allowed, switch that router to exitpolicy reject *:*
36836 until we get our next directory.
36838 - Clients choose nodes proportional to advertised bandwidth.
36839 - Avoid using nodes with low uptime as introduction points.
36840 - Handle servers with dynamic IP addresses: don't replace
36841 options->Address with the resolved one at startup, and
36842 detect our address right before we make a routerinfo each time.
36843 - 'FascistFirewall' option to pick dirservers and ORs on specific
36844 ports; plus 'FirewallPorts' config option to tell FascistFirewall
36845 which ports are open. (Defaults to 80,443)
36846 - Be more aggressive about trying to make circuits when the network
36847 has changed (e.g. when you unsuspend your laptop).
36848 - Check for time skew on http headers; report date in response to
36850 - If the entrynode config line has only one node, don't pick it as
36852 - Add strict{entry|exit}nodes config options. If set to 1, then
36853 we refuse to build circuits that don't include the specified entry
36855 - OutboundBindAddress config option, to bind to a specific
36856 IP address for outgoing connect()s.
36857 - End truncated log entries (e.g. directories) with "[truncated]".
36859 o Patches to 0.0.8preX:
36861 - Patches to compile and run on win32 again (maybe)?
36862 - Fix crash when looking for ~/.torrc with no $HOME set.
36863 - Fix a race bug in the unit tests.
36864 - Handle verified/unverified name collisions better when new
36865 routerinfo's arrive in a directory.
36866 - Sometimes routers were getting entered into the stats before
36867 we'd assigned their identity_digest. Oops.
36868 - Only pick and establish intro points after we've gotten a
36871 - AllowUnverifiedNodes config option to let circuits choose no-name
36872 routers in entry,middle,exit,introduction,rendezvous positions.
36873 Allow middle and rendezvous positions by default.
36874 - Add a man page for tor-resolve.
36877 Changes in version 0.0.7.3 - 2004-08-12
36878 o Stop dnsworkers from triggering an assert failure when you
36879 ask them to resolve the host "".
36882 Changes in version 0.0.8pre3 - 2004-08-09
36883 o Changes from 0.0.7.2:
36884 - Allow multiple ORs with same nickname in routerlist -- now when
36885 people give us one identity key for a nickname, then later
36886 another, we don't constantly complain until the first expires.
36887 - Remember used bandwidth (both in and out), and publish 15-minute
36888 snapshots for the past day into our descriptor.
36889 - You can now fetch $DIRURL/running-routers to get just the
36890 running-routers line, not the whole descriptor list. (But
36891 clients don't use this yet.)
36892 - When people mistakenly use Tor as an http proxy, point them
36893 at the tor-doc.html rather than the INSTALL.
36894 - Remove our mostly unused -- and broken -- hex_encode()
36895 function. Use base16_encode() instead. (Thanks to Timo Lindfors
36896 for pointing out this bug.)
36897 - Rotate onion keys every 12 hours, not every 2 hours, so we have
36898 fewer problems with people using the wrong key.
36899 - Change the default exit policy to reject the default edonkey,
36900 kazaa, gnutella ports.
36901 - Add replace_file() to util.[ch] to handle win32's rename().
36903 o Changes from 0.0.8preX:
36904 - Fix two bugs in saving onion keys to disk when rotating, so
36905 hopefully we'll get fewer people using old onion keys.
36906 - Fix an assert error that was making SocksPolicy not work.
36907 - Be willing to expire routers that have an open dirport -- it's
36908 just the authoritative dirservers we want to not forget.
36909 - Reject tor-resolve requests for .onion addresses early, so we
36910 don't build a whole rendezvous circuit and then fail.
36911 - When you're warning a server that he's unverified, don't cry
36912 wolf unpredictably.
36913 - Fix a race condition: don't try to extend onto a connection
36914 that's still handshaking.
36915 - For servers in clique mode, require the conn to be open before
36916 you'll choose it for your path.
36917 - Fix some cosmetic bugs about duplicate mark-for-close, lack of
36918 end relay cell, etc.
36919 - Measure bandwidth capacity over the last 24 hours, not just 12
36920 - Bugfix: authoritative dirservers were making and signing a new
36921 directory for each client, rather than reusing the cached one.
36924 Changes in version 0.0.8pre2 - 2004-08-04
36925 o Changes from 0.0.7.2:
36927 - Check directory signature _before_ you decide whether you're
36928 you're running an obsolete version and should exit.
36929 - Check directory signature _before_ you parse the running-routers
36930 list to decide who's running or verified.
36931 - Bugfixes and features:
36932 - Check return value of fclose while writing to disk, so we don't
36933 end up with broken files when servers run out of disk space.
36934 - Log a warning if the user uses an unsafe socks variant, so people
36935 are more likely to learn about privoxy or socat.
36936 - Dirservers now include RFC1123-style dates in the HTTP headers,
36937 which one day we will use to better detect clock skew.
36939 o Changes from 0.0.8pre1:
36940 - Make it compile without warnings again on win32.
36941 - Log a warning if you're running an unverified server, to let you
36942 know you might want to get it verified.
36943 - Only pick a default nickname if you plan to be a server.
36946 Changes in version 0.0.8pre1 - 2004-07-23
36948 - Made our unit tests compile again on OpenBSD 3.5, and tor
36949 itself compile again on OpenBSD on a sparc64.
36950 - We were neglecting milliseconds when logging on win32, so
36951 everything appeared to happen at the beginning of each second.
36953 o Protocol changes:
36954 - 'Extend' relay cell payloads now include the digest of the
36955 intended next hop's identity key. Now we can verify that we're
36956 extending to the right router, and also extend to routers we
36957 hadn't heard of before.
36960 - Tor nodes can now act as relays (with an advertised ORPort)
36961 without being manually verified by the dirserver operators.
36962 - Uploaded descriptors of unverified routers are now accepted
36963 by the dirservers, and included in the directory.
36964 - Verified routers are listed by nickname in the running-routers
36965 list; unverified routers are listed as "$<fingerprint>".
36966 - We now use hash-of-identity-key in most places rather than
36967 nickname or addr:port, for improved security/flexibility.
36968 - To avoid Sybil attacks, paths still use only verified servers.
36969 But now we have a chance to play around with hybrid approaches.
36970 - Nodes track bandwidth usage to estimate capacity (not used yet).
36971 - ClientOnly option for nodes that never want to become servers.
36972 - Directory caching.
36973 - "AuthoritativeDir 1" option for the official dirservers.
36974 - Now other nodes (clients and servers) will cache the latest
36975 directory they've pulled down.
36976 - They can enable their DirPort to serve it to others.
36977 - Clients will pull down a directory from any node with an open
36978 DirPort, and check the signature/timestamp correctly.
36979 - Authoritative dirservers now fetch directories from other
36980 authdirservers, to stay better synced.
36981 - Running-routers list tells who's down also, along with noting
36982 if they're verified (listed by nickname) or unverified (listed
36984 - Allow dirservers to serve running-router list separately.
36985 This isn't used yet.
36986 - ORs connect-on-demand to other ORs
36987 - If you get an extend cell to an OR you're not connected to,
36988 connect, handshake, and forward the create cell.
36989 - The authoritative dirservers stay connected to everybody,
36990 and everybody stays connected to 0.0.7 servers, but otherwise
36991 clients/servers expire unused connections after 5 minutes.
36992 - When servers get a sigint, they delay 30 seconds (refusing new
36993 connections) then exit. A second sigint causes immediate exit.
36994 - File and name management:
36995 - Look for .torrc if no CONFDIR "torrc" is found.
36996 - If no datadir is defined, then choose, make, and secure ~/.tor
36998 - If torrc not found, exitpolicy reject *:*.
36999 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
37000 - If no nickname is defined, derive default from hostname.
37001 - Rename secret key files, e.g. identity.key -> secret_id_key,
37002 to discourage people from mailing their identity key to tor-ops.
37003 - Refuse to build a circuit before the directory has arrived --
37004 it won't work anyway, since you won't know the right onion keys
37006 - Try other dirservers immediately if the one you try is down. This
37007 should tolerate down dirservers better now.
37008 - Parse tor version numbers so we can do an is-newer-than check
37009 rather than an is-in-the-list check.
37010 - New socks command 'resolve', to let us shim gethostbyname()
37012 - A 'tor_resolve' script to access the socks resolve functionality.
37013 - A new socks-extensions.txt doc file to describe our
37014 interpretation and extensions to the socks protocols.
37015 - Add a ContactInfo option, which gets published in descriptor.
37016 - Publish OR uptime in descriptor (and thus in directory) too.
37017 - Write tor version at the top of each log file
37018 - New docs in the tarball:
37020 - Document that you should proxy your SSL traffic too.
37023 Changes in version 0.0.7.2 - 2004-07-07
37024 o A better fix for the 0.0.0.0 problem, that will hopefully
37025 eliminate the remaining related assertion failures.
37028 Changes in version 0.0.7.1 - 2004-07-04
37029 o When an address resolves to 0.0.0.0, treat it as a failed resolve,
37030 since internally we use 0.0.0.0 to signify "not yet resolved".
37033 Changes in version 0.0.7 - 2004-06-07
37034 o Updated the man page to reflect the new features.
37037 Changes in version 0.0.7rc2 - 2004-06-06
37038 o Changes from 0.0.7rc1:
37039 - Make it build on Win32 again.
37040 o Changes from 0.0.6.2:
37041 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
37045 Changes in version 0.0.7rc1 - 2004-06-02
37047 - On sighup, we were adding another log without removing the first
37048 one. So log messages would get duplicated n times for n sighups.
37049 - Several cases of using a connection after we'd freed it. The
37050 problem was that connections that are pending resolve are in both
37051 the pending_resolve tree, and also the circuit's resolving_streams
37052 list. When you want to remove one, you must remove it from both.
37053 - Fix a double-mark-for-close where an end cell arrived for a
37054 resolving stream, and then the resolve failed.
37055 - Check directory signatures based on name of signer, not on whom
37056 we got the directory from. This will let us cache directories more
37059 - Crank up some of our constants to handle more users.
37062 Changes in version 0.0.7pre1 - 2004-06-02
37063 o Fixes for crashes and other obnoxious bugs:
37064 - Fix an epipe bug: sometimes when directory connections failed
37065 to connect, we would give them a chance to flush before closing
37067 - When we detached from a circuit because of resolvefailed, we
37068 would immediately try the same circuit twice more, and then
37069 give up on the resolve thinking we'd tried three different
37071 - Limit the number of intro circuits we'll attempt to build for a
37072 hidden service per 15-minute period.
37073 - Check recommended-software string *early*, before actually parsing
37074 the directory. Thus we can detect an obsolete version and exit,
37075 even if the new directory format doesn't parse.
37076 o Fixes for security bugs:
37077 - Remember which nodes are dirservers when you startup, and if a
37078 random OR enables his dirport, don't automatically assume he's
37079 a trusted dirserver.
37081 - Directory connections were asking the wrong poll socket to
37082 start writing, and not asking themselves to start writing.
37083 - When we detached from a circuit because we sent a begin but
37084 didn't get a connected, we would use it again the first time;
37085 but after that we would correctly switch to a different one.
37086 - Stop warning when the first onion decrypt attempt fails; they
37087 will sometimes legitimately fail now that we rotate keys.
37088 - Override unaligned-access-ok check when $host_cpu is ia64 or
37089 arm. Apparently they allow it but the kernel whines.
37090 - Dirservers try to reconnect periodically too, in case connections
37092 - Fix some memory leaks in directory servers.
37093 - Allow backslash in Win32 filenames.
37094 - Made Tor build complain-free on FreeBSD, hopefully without
37095 breaking other BSD builds. We'll see.
37097 - Doxygen markup on all functions and global variables.
37098 - Make directory functions update routerlist, not replace it. So
37099 now directory disagreements are not so critical a problem.
37100 - Remove the upper limit on number of descriptors in a dirserver's
37101 directory (not that we were anywhere close).
37102 - Allow multiple logfiles at different severity ranges.
37103 - Allow *BindAddress to specify ":port" rather than setting *Port
37104 separately. Allow multiple instances of each BindAddress config
37105 option, so you can bind to multiple interfaces if you want.
37106 - Allow multiple exit policy lines, which are processed in order.
37107 Now we don't need that huge line with all the commas in it.
37108 - Enable accept/reject policies on SOCKS connections, so you can bind
37109 to 0.0.0.0 but still control who can use your OP.
37112 Changes in version 0.0.6.2 - 2004-05-16
37113 o Our integrity-checking digest was checking only the most recent cell,
37114 not the previous cells like we'd thought.
37115 Thanks to Stefan Mark for finding the flaw!
37118 Changes in version 0.0.6.1 - 2004-05-06
37119 o Fix two bugs in our AES counter-mode implementation (this affected
37120 onion-level stream encryption, but not TLS-level). It turns
37121 out we were doing something much more akin to a 16-character
37122 polyalphabetic cipher. Oops.
37123 Thanks to Stefan Mark for finding the flaw!
37124 o Retire moria3 as a directory server, and add tor26 as a directory
37128 Changes in version 0.0.6 - 2004-05-02
37129 [version bump only]
37132 Changes in version 0.0.6rc4 - 2004-05-01
37133 o Update the built-in dirservers list to use the new directory format
37134 o Fix a rare seg fault: if a node offering a hidden service attempts
37135 to build a circuit to Alice's rendezvous point and fails before it
37136 reaches the last hop, it retries with a different circuit, but
37138 o Handle windows socket errors correctly.
37141 Changes in version 0.0.6rc3 - 2004-04-28
37142 o Don't expire non-general excess circuits (if we had enough
37143 circuits open, we were expiring rendezvous circuits -- even
37144 when they had a stream attached. oops.)
37145 o Fetch randomness from /dev/urandom better (not via fopen/fread)
37146 o Better debugging for tls errors
37147 o Some versions of openssl have an SSL_pending function that erroneously
37148 returns bytes when there is a non-application record pending.
37149 o Set Content-Type on the directory and hidserv descriptor.
37150 o Remove IVs from cipher code, since AES-ctr has none.
37151 o Win32 fixes. Tor now compiles on win32 with no warnings/errors.
37152 o We were using an array of length zero in a few places.
37153 o win32's gethostbyname can't resolve an IP to an IP.
37154 o win32's close can't close a socket.
37157 Changes in version 0.0.6rc2 - 2004-04-26
37158 o Fix a bug where we were closing tls connections intermittently.
37159 It turns out openssl keeps its errors around -- so if an error
37160 happens, and you don't ask about it, and then another openssl
37161 operation happens and succeeds, and you ask if there was an error,
37162 it tells you about the first error. Fun fun.
37163 o Fix a bug that's been lurking since 27 may 03 (!)
37164 When passing back a destroy cell, we would use the wrong circ id.
37165 'Mostly harmless', but still worth fixing.
37166 o Since we don't support truncateds much, don't bother sending them;
37167 just close the circ.
37168 o check for <machine/limits.h> so we build on NetBSD again (I hope).
37169 o don't crash if a conn that sent a begin has suddenly lost its circuit
37170 (this was quite rare).
37173 Changes in version 0.0.6rc1 - 2004-04-25
37174 o We now rotate link (tls context) keys and onion keys.
37175 o CREATE cells now include oaep padding, so you can tell
37176 if you decrypted them correctly.
37177 o Add bandwidthburst to server descriptor.
37178 o Directories now say which dirserver signed them.
37179 o Use a tor_assert macro that logs failed assertions too.
37182 Changes in version 0.0.6pre5 - 2004-04-18
37183 o changes from 0.0.6pre4:
37184 - make tor build on broken freebsd 5.2 installs
37185 - fix a failed assert when you try an intro point, get a nack, and try
37186 a second one and it works.
37187 - when alice uses a port that the hidden service doesn't accept,
37188 it now sends back an end cell (denied by exit policy). otherwise
37189 alice would just have to wait to time out.
37190 - fix another rare bug: when we had tried all the intro
37191 points for a hidden service, we fetched the descriptor
37192 again, but we left our introcirc thinking it had already
37193 sent an intro, so it kept waiting for a response...
37194 - bugfix: when you sleep your hidden-service laptop, as soon
37195 as it wakes up it tries to upload a service descriptor, but
37196 socketpair fails for some reason (localhost not up yet?).
37197 now we simply give up on that upload, and we'll try again later.
37198 i'd still like to find the bug though.
37199 - if an intro circ waiting for an ack dies before getting one, then
37201 - we were reusing stale service descriptors and refetching usable
37205 Changes in version 0.0.6pre4 - 2004-04-14
37206 o changes from 0.0.6pre3:
37207 - when bob fails to connect to the rendezvous point, and his
37208 circ didn't fail because of the rendezvous point itself, then
37209 he retries a couple of times
37210 - we expire introduction and rendezvous circs more thoroughly
37211 (sometimes they were hanging around forever)
37212 - we expire unattached rendezvous streams that have been around
37213 too long (they were sticking around forever).
37214 - fix a measly fencepost error that was crashing everybody with
37218 Changes in version 0.0.6pre3 - 2004-04-14
37219 o changes from 0.0.6pre2:
37220 - make hup work again
37221 - fix some memory leaks for dirservers
37222 - allow more skew in rendezvous descriptor timestamps, to help
37223 handle people like blanu who don't know what time it is
37224 - normal circs are 3 hops, but some rend/intro circs are 4, if
37225 the initiator doesn't get to choose the last hop
37226 - send acks for introductions, so alice can know whether to try
37228 - bob publishes intro points more correctly
37229 o changes from 0.0.5:
37230 - fix an assert trigger that's been plaguing us since the days
37231 of 0.0.2prexx (thanks weasel!)
37232 - retry stream correctly when we fail to connect because of
37233 exit-policy-reject (should try another) or can't-resolve-address
37234 (also should try another, because dns on random internet servers
37236 - when we hup a dirserver and we've *removed* a server from the
37237 approved-routers list, now we remove that server from the
37238 in-memory directories too
37241 Changes in version 0.0.6pre2 - 2004-04-08
37242 o We fixed our base32 implementation. Now it works on all architectures.
37245 Changes in version 0.0.6pre1 - 2004-04-08
37247 - Hidden services and rendezvous points are implemented. Go to
37248 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
37249 hidden services. (This only works via a socks4a proxy such as
37250 Privoxy, and currently it's quite slow.)
37253 Changes in version 0.0.5 - 2004-03-30
37254 [version bump only]
37257 Changes in version 0.0.5rc3 - 2004-03-29
37258 o Install torrc as torrc.sample -- we no longer clobber your
37260 o Re-enable recommendedversion checking (we broke it in rc2, oops)
37261 o Add in a 'notice' log level for things the operator should hear
37262 but that aren't warnings
37265 Changes in version 0.0.5rc2 - 2004-03-29
37266 o Hold socks connection open until reply is flushed (if possible)
37267 o Make exit nodes resolve IPs to IPs immediately, rather than asking
37268 the dns farm to do it.
37269 o Fix c99 aliasing warnings in rephist.c
37270 o Don't include server descriptors that are older than 24 hours in the
37272 o Give socks 'reject' replies their whole 15s to attempt to flush,
37273 rather than seeing the 60s timeout and assuming the flush had failed.
37274 o Clean automake droppings from the cvs repository
37277 Changes in version 0.0.5rc1 - 2004-03-28
37278 o Fix mangled-state bug in directory fetching (was causing sigpipes).
37279 o Only build circuits after we've fetched the directory: clients were
37280 using only the directory servers before they'd fetched a directory.
37281 This also means longer startup time; so it goes.
37282 o Fix an assert trigger where an OP would fail to handshake, and we'd
37283 expect it to have a nickname.
37284 o Work around a tsocks bug: do a socks reject when AP connection dies
37285 early, else tsocks goes into an infinite loop.
37288 Changes in version 0.0.4 - 2004-03-26
37289 o When connecting to a dirserver or OR and the network is down,
37293 Changes in version 0.0.3 - 2004-03-26
37294 o Warn and fail if server chose a nickname with illegal characters
37295 o Port to Solaris and Sparc:
37296 - include missing header fcntl.h
37297 - have autoconf find -lsocket -lnsl automatically
37298 - deal with hardware word alignment
37299 - make uname() work (solaris has a different return convention)
37300 - switch from using signal() to sigaction()
37301 o Preliminary work on reputation system:
37302 - Keep statistics on success/fail of connect attempts; they're published
37303 by kill -USR1 currently.
37304 - Add a RunTesting option to try to learn link state by creating test
37305 circuits, even when SocksPort is off.
37306 - Remove unused open circuits when there are too many.
37309 Changes in version 0.0.2 - 2004-03-19
37310 - Include strlcpy and strlcat for safer string ops
37311 - define INADDR_NONE so we compile (but still not run) on solaris
37314 Changes in version 0.0.2pre27 - 2004-03-14
37316 - Allow internal tor networks (we were rejecting internal IPs,
37317 now we allow them if they're set explicitly).
37318 - And fix a few endian issues.
37321 Changes in version 0.0.2pre26 - 2004-03-14
37323 - If a stream times out after 15s without a connected cell, don't
37324 try that circuit again: try a new one.
37325 - Retry streams at most 4 times. Then give up.
37326 - When a dirserver gets a descriptor from an unknown router, it
37327 logs its fingerprint (so the dirserver operator can choose to
37328 accept it even without mail from the server operator).
37329 - Inform unapproved servers when we reject their descriptors.
37330 - Make tor build on Windows again. It works as a client, who knows
37332 - Clearer instructions in the torrc for how to set up a server.
37333 - Be more efficient about reading fd's when our global token bucket
37334 (used for rate limiting) becomes empty.
37336 - Stop asserting that computers always go forward in time. It's
37338 - When we sent a cell (e.g. destroy) and then marked an OR connection
37339 expired, we might close it before finishing a flush if the other
37340 side isn't reading right then.
37341 - Don't allow dirservers to start if they haven't defined
37342 RecommendedVersions
37343 - We were caching transient dns failures. Oops.
37344 - Prevent servers from publishing an internal IP as their address.
37345 - Address a strcat vulnerability in circuit.c
37348 Changes in version 0.0.2pre25 - 2004-03-04
37350 - Put the OR's IP in its router descriptor, not its fqdn. That way
37351 we'll stop being stalled by gethostbyname for nodes with flaky dns,
37354 - If the user typed in an address that didn't resolve, the server
37358 Changes in version 0.0.2pre24 - 2004-03-03
37360 - Fix an assertion failure in dns.c, where we were trying to dequeue
37361 a pending dns resolve even if it wasn't pending
37362 - Fix a spurious socks5 warning about still trying to write after the
37363 connection is finished.
37364 - Hold certain marked_for_close connections open until they're finished
37365 flushing, rather than losing bytes by closing them too early.
37366 - Correctly report the reason for ending a stream
37367 - Remove some duplicate calls to connection_mark_for_close
37368 - Put switch_id and start_daemon earlier in the boot sequence, so it
37369 will actually try to chdir() to options.DataDirectory
37370 - Make 'make test' exit(1) if a test fails; fix some unit tests
37371 - Make tor fail when you use a config option it doesn't know about,
37372 rather than warn and continue.
37373 - Make --version work
37374 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
37377 Changes in version 0.0.2pre23 - 2004-02-29
37379 - Print a statement when the first circ is finished, so the user
37380 knows it's working.
37381 - If a relay cell is unrecognized at the end of the circuit,
37382 send back a destroy. (So attacks to mutate cells are more
37384 - New config option 'excludenodes' to avoid certain nodes for circuits.
37385 - When it daemonizes, it chdir's to the DataDirectory rather than "/",
37386 so you can collect coredumps there.
37388 - Fix a bug in tls flushing where sometimes data got wedged and
37389 didn't flush until more data got sent. Hopefully this bug was
37390 a big factor in the random delays we were seeing.
37391 - Make 'connected' cells include the resolved IP, so the client
37392 dns cache actually gets populated.
37393 - Disallow changing from ORPort=0 to ORPort>0 on hup.
37394 - When we time-out on a stream and detach from the circuit, send an
37395 end cell down it first.
37396 - Only warn about an unknown router (in exitnodes, entrynodes,
37397 excludenodes) after we've fetched a directory.
37400 Changes in version 0.0.2pre22 - 2004-02-26
37402 - Servers publish less revealing uname information in descriptors.
37403 - More memory tracking and assertions, to crash more usefully when
37405 - If the default torrc isn't there, just use some default defaults.
37406 Plus provide an internal dirservers file if they don't have one.
37407 - When the user tries to use Tor as an http proxy, give them an http
37408 501 failure explaining that we're a socks proxy.
37409 - Dump a new router.desc on hup, to help confused people who change
37410 their exit policies and then wonder why router.desc doesn't reflect
37412 - Clean up the generic tor.sh init script that we ship with.
37414 - If the exit stream is pending on the resolve, and a destroy arrives,
37415 then the stream wasn't getting removed from the pending list. I
37416 think this was the one causing recent server crashes.
37417 - Use a more robust poll on OSX 10.3, since their poll is flaky.
37418 - When it couldn't resolve any dirservers, it was useless from then on.
37419 Now it reloads the RouterFile (or default dirservers) if it has no
37421 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
37422 many users don't even *have* a /usr/local/sbin/.
37425 Changes in version 0.0.2pre21 - 2004-02-18
37427 - There's a ChangeLog file that actually reflects the changelog.
37428 - There's a 'torify' wrapper script, with an accompanying
37429 tor-tsocks.conf, that simplifies the process of using tsocks for
37430 tor. It even has a man page.
37431 - The tor binary gets installed to sbin rather than bin now.
37432 - Retry streams where the connected cell hasn't arrived in 15 seconds
37433 - Clean up exit policy handling -- get the default out of the torrc,
37434 so we can update it without forcing each server operator to fix
37436 - Allow imaps and pop3s in default exit policy
37438 - Prevent picking middleman nodes as the last node in the circuit
37441 Changes in version 0.0.2pre20 - 2004-01-30
37443 - We now have a deb package, and it's in debian unstable. Go to
37444 it, apt-getters. :)
37445 - I've split the TotalBandwidth option into BandwidthRate (how many
37446 bytes per second you want to allow, long-term) and
37447 BandwidthBurst (how many bytes you will allow at once before the cap
37448 kicks in). This better token bucket approach lets you, say, set
37449 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
37450 performance while not exceeding your monthly bandwidth quota.
37451 - Push out a tls record's worth of data once you've got it, rather
37452 than waiting until you've read everything waiting to be read. This
37453 may improve performance by pipelining better. We'll see.
37454 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
37455 from failed circuits (if they haven't been connected yet) and attach
37457 - Expire old streams that haven't managed to connect. Some day we'll
37458 have them reattach to new circuits instead.
37461 - Fix several memory leaks that were causing servers to become bloated
37463 - Fix a few very rare assert triggers. A few more remain.
37464 - Setuid to User _before_ complaining about running as root.
37467 Changes in version 0.0.2pre19 - 2004-01-07
37469 - Fix deadlock condition in dns farm. We were telling a child to die by
37470 closing the parent's file descriptor to him. But newer children were
37471 inheriting the open file descriptor from the parent, and since they
37472 weren't closing it, the socket never closed, so the child never read
37473 eof, so he never knew to exit. Similarly, dns workers were holding
37474 open other sockets, leading to all sorts of chaos.
37475 - New cleaner daemon() code for forking and backgrounding.
37476 - If you log to a file, it now prints an entry at the top of the
37477 logfile so you know it's working.
37478 - The onionskin challenge length was 30 bytes longer than necessary.
37479 - Started to patch up the spec so it's not quite so out of date.
37482 Changes in version 0.0.2pre18 - 2004-01-02
37484 - Fix endian issues with the 'integrity' field in the relay header.
37485 - Fix a potential bug where connections in state
37486 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
37489 Changes in version 0.0.2pre17 - 2003-12-30
37491 - Made --debuglogfile (or any second log file, actually) work.
37492 - Resolved an edge case in get_unique_circ_id_by_conn where a smart
37493 adversary could force us into an infinite loop.
37496 - Each onionskin handshake now includes a hash of the computed key,
37497 to prove the server's identity and help perfect forward secrecy.
37498 - Changed cell size from 256 to 512 bytes (working toward compatibility
37500 - Changed cell length to 2 bytes, and moved it to the relay header.
37501 - Implemented end-to-end integrity checking for the payloads of
37503 - Separated streamid from 'recognized' (otherwise circuits will get
37504 messed up when we try to have streams exit from the middle). We
37505 use the integrity-checking to confirm that a cell is addressed to
37507 - Randomize the initial circid and streamid values, so an adversary who
37508 breaks into a node can't learn how many circuits or streams have
37512 Changes in version 0.0.2pre16 - 2003-12-14
37514 - Fixed a bug that made HUP trigger an assert
37515 - Fixed a bug where a circuit that immediately failed wasn't being
37516 counted as a failed circuit in counting retries.
37519 - Now we close the circuit when we get a truncated cell: otherwise we're
37520 open to an anonymity attack where a bad node in the path truncates
37521 the circuit and then we open streams at him.
37522 - Add port ranges to exit policies
37523 - Add a conservative default exit policy
37524 - Warn if you're running tor as root
37525 - on HUP, retry OR connections and close/rebind listeners
37526 - options.EntryNodes: try these nodes first when picking the first node
37527 - options.ExitNodes: if your best choices happen to include any of
37528 your preferred exit nodes, you choose among just those preferred
37530 - options.ExcludedNodes: nodes that are never picked in path building
37533 Changes in version 0.0.2pre15 - 2003-12-03
37534 o Robustness and bugfixes:
37535 - Sometimes clients would cache incorrect DNS resolves, which would
37536 really screw things up.
37537 - An OP that goes offline would slowly leak all its sockets and stop
37539 - A wide variety of bugfixes in exit node selection, exit policy
37540 handling, and processing pending streams when a new circuit is
37542 - Pick nodes for a path only from those the directory says are up
37543 - Choose randomly from all running dirservers, not always the first one
37544 - Increase allowed http header size for directory fetch.
37545 - Stop writing to stderr (if we're daemonized it will be closed).
37546 - Enable -g always, so cores will be more useful to me.
37547 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
37550 - Wrote a man page. It lists commonly used options.
37553 - Change default loglevel to warn.
37554 - Make PidFile default to null rather than littering in your CWD.
37555 - OnionRouter config option is now obsolete. Instead it just checks
37557 - Moved to a single unified torrc file for both clients and servers.
37560 Changes in version 0.0.2pre14 - 2003-11-29
37561 o Robustness and bugfixes:
37562 - Force the admin to make the DataDirectory himself
37563 - to get ownership/permissions right
37564 - so clients no longer make a DataDirectory and then never use it
37565 - fix bug where a client who was offline for 45 minutes would never
37566 pull down a directory again
37567 - fix (or at least hide really well) the dns assert bug that was
37568 causing server crashes
37569 - warnings and improved robustness wrt clockskew for certs
37570 - use the native daemon(3) to daemonize, when available
37571 - exit if bind() fails
37572 - exit if neither socksport nor orport is defined
37573 - include our own tor_timegm (Win32 doesn't have its own)
37574 - bugfix for win32 with lots of connections
37575 - fix minor bias in PRNG
37576 - make dirserver more robust to corrupt cached directory
37579 - Wrote the design document (woo)
37581 o Circuit building and exit policies:
37582 - Circuits no longer try to use nodes that the directory has told them
37584 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
37585 bitcounts (18.0.0.0/8).
37586 - Make AP connections standby for a circuit if no suitable circuit
37587 exists, rather than failing
37588 - Circuits choose exit node based on addr/port, exit policies, and
37589 which AP connections are standing by
37590 - Bump min pathlen from 2 to 3
37591 - Relay end cells have a payload to describe why the stream ended.
37592 - If the stream failed because of exit policy, try again with a new
37594 - Clients have a dns cache to remember resolved addresses.
37595 - Notice more quickly when we have no working circuits
37598 - APPort is now called SocksPort
37599 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
37601 - RecommendedVersions is now a config variable rather than
37602 hardcoded (for dirservers)
37603 - Reloads config on HUP
37604 - Usage info on -h or --help
37605 - If you set User and Group config vars, it'll setu/gid to them.
37608 Changes in version 0.0.2pre13 - 2003-10-19
37609 o General stability:
37610 - SSL_write no longer fails when it returns WANTWRITE and the number
37611 of bytes in the buf has changed by the next SSL_write call.
37612 - Fix segfault fetching directory when network is down
37613 - Fix a variety of minor memory leaks
37614 - Dirservers reload the fingerprints file on HUP, so I don't have
37615 to take down the network when I approve a new router
37616 - Default server config file has explicit Address line to specify fqdn
37619 - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
37620 - Make listener connections not ever alloc bufs
37622 o Autoconf improvements:
37623 - don't clobber an external CFLAGS in ./configure
37624 - Make install now works
37625 - create var/lib/tor on make install
37626 - autocreate a tor.sh initscript to help distribs
37627 - autocreate the torrc and sample-server-torrc with correct paths
37629 o Log files and Daemonizing now work:
37630 - If --DebugLogFile is specified, log to it at -l debug
37631 - If --LogFile is specified, use it instead of commandline
37632 - If --RunAsDaemon is set, tor forks and backgrounds on startup