tor-commits September 2012

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[tor/master] remove the changes files that are merged into 0.2.3.21-rc
by arma＠torproject.org 05 Sep '12

05 Sep '12

commit 031da8dd34bf494fc53e67e3b21831571a1ec5ea Author: Roger Dingledine <arma(a)torproject.org> Date: Tue Sep 4 20:11:19 2012 -0400 remove the changes files that are merged into 0.2.3.21-rc --- changes/bug6244_part_c | 6 ------ changes/bug6251 | 6 ------ changes/bug6252_again | 11 ----------- changes/bug6379 | 6 ------ changes/bug6404 | 16 ---------------- changes/bug6423 | 3 --- changes/bug6472 | 4 ---- changes/bug6475 | 6 ------ changes/bug6507 | 15 --------------- changes/bug6514 | 5 ----- changes/bug6690 | 7 ------- changes/bug6710 | 6 ------ changes/bug6732 | 3 --- 13 files changed, 0 insertions(+), 94 deletions(-) diff --git a/changes/bug6244_part_c b/changes/bug6244_part_c deleted file mode 100644 index dea6e7b..0000000 --- a/changes/bug6244_part_c +++ /dev/null @@ -1,6 +0,0 @@ - o Major bugfixes (controller): - - Make wildcarded addresses (that is, ones beginning with *.) work when - provided via the controller's MapAddress command. Previously, they - were accepted, but we never actually noticed that they were wildcards. - Fix for bug 6244; bugfix on 0.2.3.9-alpha. - diff --git a/changes/bug6251 b/changes/bug6251 deleted file mode 100644 index c782a93..0000000 --- a/changes/bug6251 +++ /dev/null @@ -1,6 +0,0 @@ - o Minor bugfixes: - - Downgrade "set buildtimeout to low value" messages to INFO - severity; they were never an actual problem, there was never - anything reasonable to do about them, and they tended to spam - logs from time to time. Fix for bug 6251; bugfix on - 0.2.2.2-alpha. \ No newline at end of file diff --git a/changes/bug6252_again b/changes/bug6252_again deleted file mode 100644 index f7fd00c..0000000 --- a/changes/bug6252_again +++ /dev/null @@ -1,11 +0,0 @@ - o Security fixes: - - Tear down the circuit if we get an unexpected SENDME cell. Clients - could use this trick to make their circuits receive cells faster - than our flow control would have allowed, or to gum up the network, - or possibly to do targeted memory denial-of-service attacks on - entry nodes. Fixes bug 6252. Bugfix on the 54th commit on Tor -- - from July 2002, before the release of Tor 0.0.0. We had committed - this patch previously, but we had to revert it because of bug 6271. - Now that 6271 is fixed, this appears to work. - - diff --git a/changes/bug6379 b/changes/bug6379 deleted file mode 100644 index 1f2b694..0000000 --- a/changes/bug6379 +++ /dev/null @@ -1,6 +0,0 @@ - o Minor bugfixes: - - Fix build warnings from --enable-openbsd-malloc with gcc warnings - enabled. Fixes bug 6379. - - Fix 64-bit warnings from --enable-openbsd-malloc. Fixes bug 6379. - Bugfix on 0.2.0.20-rc. - diff --git a/changes/bug6404 b/changes/bug6404 deleted file mode 100644 index 948f00b..0000000 --- a/changes/bug6404 +++ /dev/null @@ -1,16 +0,0 @@ - o Minor bugfixes: - - - Remove the maximum length of microdescriptor we are willing to - generate. Occasionally this is needed for routers - with complex policies or family declarations. Partial fix for - bug 6404; fix on 0.2.2.6-alpha. - - - Authorities no longer include any router in their - microdescriptor consensuses for which they couldn't generate or - agree on a microdescriptor. Partial fix for bug 6404; fix on - 0.2.2.6-alpha. - - - Move log message when unable to find a microdesc in a - routerstatus entry to parse time. Previously we'd spam this - warning every time we tried to figure out which microdescriptors - to download. Partial fix for bug 6404; fix on 0.2.3.18-rc. diff --git a/changes/bug6423 b/changes/bug6423 deleted file mode 100644 index 2ea4f14..0000000 --- a/changes/bug6423 +++ /dev/null @@ -1,3 +0,0 @@ - o Minor features: - - Consider new, removed or changed IPv6 OR ports a non cosmetic - change. diff --git a/changes/bug6472 b/changes/bug6472 deleted file mode 100644 index dcd42eb..0000000 --- a/changes/bug6472 +++ /dev/null @@ -1,4 +0,0 @@ - o Minor bugfixes: - - Avoid a pair of double-free and use-after-mark bugs that can - occur with certain timings in canceled and re-received DNS - requests. Fix for bug 6472; bugfix on 0.0.7rc1. diff --git a/changes/bug6475 b/changes/bug6475 deleted file mode 100644 index 67bab99..0000000 --- a/changes/bug6475 +++ /dev/null @@ -1,6 +0,0 @@ - o Minor bugfixes: - - Add internal circuit construction state to protect against - the noisy warn message "Unexpectedly high circuit_successes". - Also add some additional rate-limited notice messages to help - determine the root cause of the warn. Fixes bug 6475. - Bugfix against 0.2.3.17-beta. diff --git a/changes/bug6507 b/changes/bug6507 deleted file mode 100644 index 89940cb..0000000 --- a/changes/bug6507 +++ /dev/null @@ -1,15 +0,0 @@ - o Major bugfixes: - - Detect 'ORPort 0' as meaning, uniformly, that we're not running - as a server. Previously, some of our code would treat the - presence of any ORPort line as meaning that we should act like a - server, even though our new listener code would correctly not - open any ORPorts for ORPort 0. Similar bugs in other Port - options are also fixed. Fixes bug 6507; bugfix on 0.2.3.3-alpha. - - o Minor features: - - - Detect and reject attempts to specify both 'FooPort' and - 'FooPort 0' in the same configuration domain. (It's still okay - to have a FooPort in your configuration file,and use 'FooPort 0' - on the command line to disable it.) Fixes another case of - bug6507; bugfix on 0.2.3.3-alpha. diff --git a/changes/bug6514 b/changes/bug6514 deleted file mode 100644 index 84633bd..0000000 --- a/changes/bug6514 +++ /dev/null @@ -1,5 +0,0 @@ - o Minor bugfixes: - - Add a (probably redundant) memory clear between iterations of - the router status voting loop, to prevent future coding errors - where data might leak between iterations of the loop. Resolves - ticket 6514. diff --git a/changes/bug6690 b/changes/bug6690 deleted file mode 100644 index 99d4297..0000000 --- a/changes/bug6690 +++ /dev/null @@ -1,7 +0,0 @@ - o Major bugfixes (security): - - Do not crash when comparing an address with port value 0 to an - address policy. This bug could have been used to cause a remote - assertion failure by or against directory authorities, or to - allow some applications to crash clients. Fixes bug 6690; bugfix - on 0.2.1.10-alpha. - diff --git a/changes/bug6710 b/changes/bug6710 deleted file mode 100644 index 2c89346..0000000 --- a/changes/bug6710 +++ /dev/null @@ -1,6 +0,0 @@ - o Major bugfixes (security): - - Reject any attempt to extend to an internal address. Without - this fix, a router could be used to probe addresses on an - internal network to see whether they were accepting - connections. Fix for bug 6710; bugfix on 0.0.8pre1. - diff --git a/changes/bug6732 b/changes/bug6732 deleted file mode 100644 index 7a744e0..0000000 --- a/changes/bug6732 +++ /dev/null @@ -1,3 +0,0 @@ - o Documentation: - - Add missing documentation for consensus and microdesc files. Fix for - bug 6732.

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[tor/release-0.2.3] bump to 0.2.3.21-rc
by arma＠torproject.org 04 Sep '12

04 Sep '12

commit 0eaebaeb63daadd7be3d7accbdf4e8697dbe5b5c Author: Roger Dingledine <arma(a)torproject.org> Date: Tue Sep 4 19:55:59 2012 -0400 bump to 0.2.3.21-rc --- configure.in | 2 +- contrib/tor-mingw.nsi.in | 2 +- src/win32/orconfig.h | 2 +- 3 files changed, 3 insertions(+), 3 deletions(-) diff --git a/configure.in b/configure.in index a66ae21..47a84bb 100644 --- a/configure.in +++ b/configure.in @@ -4,7 +4,7 @@ dnl Copyright (c) 2007-2012, The Tor Project, Inc. dnl See LICENSE for licensing information AC_INIT -AM_INIT_AUTOMAKE(tor, 0.2.3.20-rc) +AM_INIT_AUTOMAKE(tor, 0.2.3.21-rc) AM_CONFIG_HEADER(orconfig.h) AC_CANONICAL_HOST diff --git a/contrib/tor-mingw.nsi.in b/contrib/tor-mingw.nsi.in index 6655587..4b7bac3 100644 --- a/contrib/tor-mingw.nsi.in +++ b/contrib/tor-mingw.nsi.in @@ -8,7 +8,7 @@ !include "LogicLib.nsh" !include "FileFunc.nsh" !insertmacro GetParameters -!define VERSION "0.2.3.20-rc" +!define VERSION "0.2.3.21-rc" !define INSTALLER "tor-${VERSION}-win32.exe" !define WEBSITE "https://www.torproject.org/" !define LICENSE "LICENSE" diff --git a/src/win32/orconfig.h b/src/win32/orconfig.h index d388590..46a33e6 100644 --- a/src/win32/orconfig.h +++ b/src/win32/orconfig.h @@ -232,7 +232,7 @@ #define USING_TWOS_COMPLEMENT /* Version number of package */ -#define VERSION "0.2.3.20-rc" +#define VERSION "0.2.3.21-rc"

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[tor/release-0.2.3] fold in recent 0.2.3 changes files
by arma＠torproject.org 04 Sep '12

04 Sep '12

commit 2946a8087bc1d6c3370d19908a5121fcf38aa81d Author: Roger Dingledine <arma(a)torproject.org> Date: Tue Sep 4 19:54:01 2012 -0400 fold in recent 0.2.3 changes files --- ChangeLog | 86 +++++++++++++++++++++++++++++++++++++ changes/bug6244_part_c | 6 --- changes/bug6251 | 6 --- changes/bug6252_again | 11 ----- changes/bug6379 | 6 --- changes/bug6404 | 16 ------- changes/bug6423 | 3 - changes/bug6472 | 4 -- changes/bug6475 | 6 --- changes/bug6507 | 15 ------ changes/bug6514 | 5 -- changes/bug6690 | 7 --- changes/bug6710 | 6 --- changes/bug6732 | 3 - changes/disable_pathbias_messages | 3 - 15 files changed, 86 insertions(+), 97 deletions(-) diff --git a/ChangeLog b/ChangeLog index bdce206..59d9a3c 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,89 @@ +Changes in version 0.2.3.21-rc - 2012-09-05 + Tor 0.2.3.21-rc is the fourth release candidate for the Tor 0.2.3.x + series. It fixes a trio of potential security bugs, fixes a bug where + we were leaving some of the fast relays out of the microdescriptor + consensus, resumes interpreting "ORPort 0" and "DirPort 0" correctly, + and cleans up other smaller issues. + + o Major bugfixes (security): + - Tear down the circuit if we get an unexpected SENDME cell. Clients + could use this trick to make their circuits receive cells faster + than our flow control would have allowed, or to gum up the network, + or possibly to do targeted memory denial-of-service attacks on + entry nodes. Fixes bug 6252. Bugfix on the 54th commit on Tor -- + from July 2002, before the release of Tor 0.0.0. We had committed + this patch previously, but we had to revert it because of bug 6271. + Now that 6271 is fixed, this patch appears to work. + - Reject any attempt to extend to an internal address. Without + this fix, a router could be used to probe addresses on an internal + network to see whether they were accepting connections. Fixes bug + 6710; bugfix on 0.0.8pre1. + - Do not crash when comparing an address with port value 0 to an + address policy. This bug could have been used to cause a remote + assertion failure by or against directory authorities, or to + allow some applications to crash clients. Fixes bug 6690; bugfix + on 0.2.1.10-alpha. + + o Major bugfixes: + - Remove the upper bound on microdescriptor length. We were hitting + the limit for routers with complex exit policies or family + declarations, causing clients to not use them. Fixes the first + piece of bug 6404; fix on 0.2.2.6-alpha. + - Detect "ORPort 0" as meaning, uniformly, that we're not running + as a relay. Previously, some of our code would treat the presence + of any ORPort line as meaning that we should act like a relay, + even though our new listener code would correctly not open any + ORPorts for ORPort 0. Similar bugs in other Port options are also + fixed. Fixes the first half of bug 6507; bugfix on 0.2.3.3-alpha. + + o Minor bugfixes: + - Avoid a pair of double-free and use-after-mark bugs that can + occur with certain timings in canceled and re-received DNS + requests. Fixes bug 6472; bugfix on 0.0.7rc1. + - Fix build and 64-bit compile warnings from --enable-openbsd-malloc. + Fixes bug 6379. Bugfix on 0.2.0.20-rc. + - Authorities no longer include any router in their microdescriptor + consensuses for which they couldn't generate or agree on a + microdescriptor. Fixes the second piece of bug 6404; fix on + 0.2.2.6-alpha. + - Detect and reject attempts to specify both "FooPort" and + "FooPort 0" in the same configuration domain. (It's still okay + to have a FooPort in your configuration file, and use "FooPort 0" + on the command line to disable it.) Fixes the second half of bug + 6507; bugfix on 0.2.3.3-alpha. + - Make wildcarded addresses (that is, ones beginning with "*.") work + when provided via the controller's MapAddress command. Previously, + they were accepted, but we never actually noticed that they were + wildcards. Fixes bug 6244; bugfix on 0.2.3.9-alpha. + - Add a (probably redundant) memory clear between iterations of + the router status voting loop, to prevent future coding errors + where data might leak between iterations of the loop. Resolves + ticket 6514. + + o Minor bugfixes (log messages): + - Downgrade "set buildtimeout to low value" messages to "info" + severity; they were never an actual problem, there was never + anything reasonable to do about them, and they tended to spam logs + from time to time. Fixes bug 6251; bugfix on 0.2.2.2-alpha. + - Downgrade path-bias warning messages to "info". We'll try to get + them working better in 0.2.4. Add internal circuit construction + state to protect against the noisy warn message "Unexpectedly high + circuit_successes". Also add some additional rate-limited notice + messages to help determine the root cause of the warn. Fixes bug + 6475. Bugfix against 0.2.3.17-beta. + - Move log message when unable to find a microdesc in a routerstatus + entry to parse time. Previously we'd spam this warning every time + we tried to figure out which microdescriptors to download. Fixes + the third piece of bug 6404; fix on 0.2.3.18-rc. + + o Minor features: + - Consider new, removed or changed IPv6 OR ports a non-cosmetic + change when the authority is deciding whether to accept a newly + uploaded descriptor. Implements ticket 6423. + - Add missing documentation for consensus and microdesc files. + Resolves ticket 6732. + + Changes in version 0.2.2.38 - 2012-08-12 Tor 0.2.2.38 fixes a remotely triggerable crash bug, and fixes a timing attack that could in theory leak path information. diff --git a/changes/bug6244_part_c b/changes/bug6244_part_c deleted file mode 100644 index dea6e7b..0000000 --- a/changes/bug6244_part_c +++ /dev/null @@ -1,6 +0,0 @@ - o Major bugfixes (controller): - - Make wildcarded addresses (that is, ones beginning with *.) work when - provided via the controller's MapAddress command. Previously, they - were accepted, but we never actually noticed that they were wildcards. - Fix for bug 6244; bugfix on 0.2.3.9-alpha. - diff --git a/changes/bug6251 b/changes/bug6251 deleted file mode 100644 index c782a93..0000000 --- a/changes/bug6251 +++ /dev/null @@ -1,6 +0,0 @@ - o Minor bugfixes: - - Downgrade "set buildtimeout to low value" messages to INFO - severity; they were never an actual problem, there was never - anything reasonable to do about them, and they tended to spam - logs from time to time. Fix for bug 6251; bugfix on - 0.2.2.2-alpha. \ No newline at end of file diff --git a/changes/bug6252_again b/changes/bug6252_again deleted file mode 100644 index f7fd00c..0000000 --- a/changes/bug6252_again +++ /dev/null @@ -1,11 +0,0 @@ - o Security fixes: - - Tear down the circuit if we get an unexpected SENDME cell. Clients - could use this trick to make their circuits receive cells faster - than our flow control would have allowed, or to gum up the network, - or possibly to do targeted memory denial-of-service attacks on - entry nodes. Fixes bug 6252. Bugfix on the 54th commit on Tor -- - from July 2002, before the release of Tor 0.0.0. We had committed - this patch previously, but we had to revert it because of bug 6271. - Now that 6271 is fixed, this appears to work. - - diff --git a/changes/bug6379 b/changes/bug6379 deleted file mode 100644 index 1f2b694..0000000 --- a/changes/bug6379 +++ /dev/null @@ -1,6 +0,0 @@ - o Minor bugfixes: - - Fix build warnings from --enable-openbsd-malloc with gcc warnings - enabled. Fixes bug 6379. - - Fix 64-bit warnings from --enable-openbsd-malloc. Fixes bug 6379. - Bugfix on 0.2.0.20-rc. - diff --git a/changes/bug6404 b/changes/bug6404 deleted file mode 100644 index 948f00b..0000000 --- a/changes/bug6404 +++ /dev/null @@ -1,16 +0,0 @@ - o Minor bugfixes: - - - Remove the maximum length of microdescriptor we are willing to - generate. Occasionally this is needed for routers - with complex policies or family declarations. Partial fix for - bug 6404; fix on 0.2.2.6-alpha. - - - Authorities no longer include any router in their - microdescriptor consensuses for which they couldn't generate or - agree on a microdescriptor. Partial fix for bug 6404; fix on - 0.2.2.6-alpha. - - - Move log message when unable to find a microdesc in a - routerstatus entry to parse time. Previously we'd spam this - warning every time we tried to figure out which microdescriptors - to download. Partial fix for bug 6404; fix on 0.2.3.18-rc. diff --git a/changes/bug6423 b/changes/bug6423 deleted file mode 100644 index 2ea4f14..0000000 --- a/changes/bug6423 +++ /dev/null @@ -1,3 +0,0 @@ - o Minor features: - - Consider new, removed or changed IPv6 OR ports a non cosmetic - change. diff --git a/changes/bug6472 b/changes/bug6472 deleted file mode 100644 index dcd42eb..0000000 --- a/changes/bug6472 +++ /dev/null @@ -1,4 +0,0 @@ - o Minor bugfixes: - - Avoid a pair of double-free and use-after-mark bugs that can - occur with certain timings in canceled and re-received DNS - requests. Fix for bug 6472; bugfix on 0.0.7rc1. diff --git a/changes/bug6475 b/changes/bug6475 deleted file mode 100644 index 67bab99..0000000 --- a/changes/bug6475 +++ /dev/null @@ -1,6 +0,0 @@ - o Minor bugfixes: - - Add internal circuit construction state to protect against - the noisy warn message "Unexpectedly high circuit_successes". - Also add some additional rate-limited notice messages to help - determine the root cause of the warn. Fixes bug 6475. - Bugfix against 0.2.3.17-beta. diff --git a/changes/bug6507 b/changes/bug6507 deleted file mode 100644 index 89940cb..0000000 --- a/changes/bug6507 +++ /dev/null @@ -1,15 +0,0 @@ - o Major bugfixes: - - Detect 'ORPort 0' as meaning, uniformly, that we're not running - as a server. Previously, some of our code would treat the - presence of any ORPort line as meaning that we should act like a - server, even though our new listener code would correctly not - open any ORPorts for ORPort 0. Similar bugs in other Port - options are also fixed. Fixes bug 6507; bugfix on 0.2.3.3-alpha. - - o Minor features: - - - Detect and reject attempts to specify both 'FooPort' and - 'FooPort 0' in the same configuration domain. (It's still okay - to have a FooPort in your configuration file,and use 'FooPort 0' - on the command line to disable it.) Fixes another case of - bug6507; bugfix on 0.2.3.3-alpha. diff --git a/changes/bug6514 b/changes/bug6514 deleted file mode 100644 index 84633bd..0000000 --- a/changes/bug6514 +++ /dev/null @@ -1,5 +0,0 @@ - o Minor bugfixes: - - Add a (probably redundant) memory clear between iterations of - the router status voting loop, to prevent future coding errors - where data might leak between iterations of the loop. Resolves - ticket 6514. diff --git a/changes/bug6690 b/changes/bug6690 deleted file mode 100644 index 99d4297..0000000 --- a/changes/bug6690 +++ /dev/null @@ -1,7 +0,0 @@ - o Major bugfixes (security): - - Do not crash when comparing an address with port value 0 to an - address policy. This bug could have been used to cause a remote - assertion failure by or against directory authorities, or to - allow some applications to crash clients. Fixes bug 6690; bugfix - on 0.2.1.10-alpha. - diff --git a/changes/bug6710 b/changes/bug6710 deleted file mode 100644 index 2c89346..0000000 --- a/changes/bug6710 +++ /dev/null @@ -1,6 +0,0 @@ - o Major bugfixes (security): - - Reject any attempt to extend to an internal address. Without - this fix, a router could be used to probe addresses on an - internal network to see whether they were accepting - connections. Fix for bug 6710; bugfix on 0.0.8pre1. - diff --git a/changes/bug6732 b/changes/bug6732 deleted file mode 100644 index 7a744e0..0000000 --- a/changes/bug6732 +++ /dev/null @@ -1,3 +0,0 @@ - o Documentation: - - Add missing documentation for consensus and microdesc files. Fix for - bug 6732. diff --git a/changes/disable_pathbias_messages b/changes/disable_pathbias_messages deleted file mode 100644 index 3bc9963..0000000 --- a/changes/disable_pathbias_messages +++ /dev/null @@ -1,3 +0,0 @@ - o Disabeled features - - Downgrade path-bias warning messages to INFO. We'll try to get them - working better in 0.2.4. Fixes bug 6475; bugfix on 0.2.3.17-beta.

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[tor/release-0.2.3] Detect bug 6252 (unexpected sendme cell)
by arma＠torproject.org 04 Sep '12

04 Sep '12

commit c1bd10411116c549326f74b09658a50bbae812b4 Author: Roger Dingledine <arma(a)torproject.org> Date: Thu Jun 28 14:00:01 2012 -0400 Detect bug 6252 (unexpected sendme cell) I only check on circuits, not streams, since bloating your stream window past the initial circuit window can't help you much. Also, I compare to CIRCWINDOW_START_MAX so we don't have surprising races if we lower CIRCWINDOW_START for an experiment. --- changes/bug6252 | 8 ++++++++ src/or/relay.c | 14 ++++++++++++++ 2 files changed, 22 insertions(+), 0 deletions(-) diff --git a/changes/bug6252 b/changes/bug6252 new file mode 100644 index 0000000..0d29203 --- /dev/null +++ b/changes/bug6252 @@ -0,0 +1,8 @@ + o Security fixes: + - Tear down the circuit if we get an unexpected SENDME cell. Clients + could use this trick to make their circuits receive cells faster + than our flow control would have allowed, or to gum up the network, + or possibly to do targeted memory denial-of-service attacks on + entry nodes. Fixes bug 6252. Bugfix on the 54th commit on Tor -- + from July 2002, before the release of Tor 0.0.0. + diff --git a/src/or/relay.c b/src/or/relay.c index 3e418ea..3d261c2 100644 --- a/src/or/relay.c +++ b/src/or/relay.c @@ -1265,11 +1265,25 @@ connection_edge_process_relay_cell(cell_t *cell, circuit_t *circ, case RELAY_COMMAND_SENDME: if (!rh.stream_id) { if (layer_hint) { + if (layer_hint->package_window + CIRCWINDOW_INCREMENT > + CIRCWINDOW_START_MAX) { + log_fn(LOG_PROTOCOL_WARN, LD_PROTOCOL, + "Bug/attack: unexpected sendme cell from exit relay. " + "Closing circ."); + return -END_CIRC_REASON_TORPROTOCOL; + } layer_hint->package_window += CIRCWINDOW_INCREMENT; log_debug(LD_APP,"circ-level sendme at origin, packagewindow %d.", layer_hint->package_window); circuit_resume_edge_reading(circ, layer_hint); } else { + if (circ->package_window + CIRCWINDOW_INCREMENT > + CIRCWINDOW_START_MAX) { + log_fn(LOG_PROTOCOL_WARN, LD_PROTOCOL, + "Bug/attack: unexpected sendme cell from client. " + "Closing circ."); + return -END_CIRC_REASON_TORPROTOCOL; + } circ->package_window += CIRCWINDOW_INCREMENT; log_debug(LD_APP, "circ-level sendme at non-origin, packagewindow %d.",

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[tor/release-0.2.3] Have the bug6252 commit message reflect its on-again/off-again status
by arma＠torproject.org 04 Sep '12

04 Sep '12

commit 393944dfb67fb27991e152ec67f74cebbf3a23ba Author: Nick Mathewson <nickm(a)torproject.org> Date: Wed Jul 18 10:24:17 2012 -0400 Have the bug6252 commit message reflect its on-again/off-again status --- changes/bug6252 | 8 -------- changes/bug6252_again | 11 +++++++++++ 2 files changed, 11 insertions(+), 8 deletions(-) diff --git a/changes/bug6252 b/changes/bug6252 deleted file mode 100644 index 0d29203..0000000 --- a/changes/bug6252 +++ /dev/null @@ -1,8 +0,0 @@ - o Security fixes: - - Tear down the circuit if we get an unexpected SENDME cell. Clients - could use this trick to make their circuits receive cells faster - than our flow control would have allowed, or to gum up the network, - or possibly to do targeted memory denial-of-service attacks on - entry nodes. Fixes bug 6252. Bugfix on the 54th commit on Tor -- - from July 2002, before the release of Tor 0.0.0. - diff --git a/changes/bug6252_again b/changes/bug6252_again new file mode 100644 index 0000000..f7fd00c --- /dev/null +++ b/changes/bug6252_again @@ -0,0 +1,11 @@ + o Security fixes: + - Tear down the circuit if we get an unexpected SENDME cell. Clients + could use this trick to make their circuits receive cells faster + than our flow control would have allowed, or to gum up the network, + or possibly to do targeted memory denial-of-service attacks on + entry nodes. Fixes bug 6252. Bugfix on the 54th commit on Tor -- + from July 2002, before the release of Tor 0.0.0. We had committed + this patch previously, but we had to revert it because of bug 6271. + Now that 6271 is fixed, this appears to work. + +

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[tor/release-0.2.3] Allow microdescs to be up to 2k. Partial fix for 6404.
by arma＠torproject.org 04 Sep '12

04 Sep '12

commit 2503cfad240bfd59b033b4380b0ebd4a8a148802 Author: Nick Mathewson <nickm(a)torproject.org> Date: Tue Jul 31 10:48:35 2012 -0400 Allow microdescs to be up to 2k. Partial fix for 6404. --- changes/bug6404 | 7 +++++++ src/or/dirvote.c | 2 +- 2 files changed, 8 insertions(+), 1 deletions(-) diff --git a/changes/bug6404 b/changes/bug6404 new file mode 100644 index 0000000..d01964d --- /dev/null +++ b/changes/bug6404 @@ -0,0 +1,7 @@ + o Minor bugfixes: + + - Increase the maximum length of microdescriptor we are willing to + generate from 1K to 2K. Occasionally this is needed for routers + with complex policies or family declarations. Partial fix for + bug 6404; fix on 0.2.2.6-alpha. + diff --git a/src/or/dirvote.c b/src/or/dirvote.c index 7995873..85ea85c 100644 --- a/src/or/dirvote.c +++ b/src/or/dirvote.c @@ -3502,7 +3502,7 @@ dirvote_create_microdescriptor(const routerinfo_t *ri) { microdesc_t *result = NULL; char *key = NULL, *summary = NULL, *family = NULL; - char buf[1024]; + char buf[2048]; size_t keylen; char *out = buf, *end = buf+sizeof(buf);

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[tor/release-0.2.3] Don't include a router in an md consensus if we can't find a md for it.
by arma＠torproject.org 04 Sep '12

04 Sep '12

commit 7143d112a69806bde4a29bf8da94704cfb435fe3 Author: Nick Mathewson <nickm(a)torproject.org> Date: Tue Jul 31 10:54:14 2012 -0400 Don't include a router in an md consensus if we can't find a md for it. The spec requires that every router in a microdesc consensus have an m line; we weren't obeying that spec. This creates a new consensus method (13) to allow voting to continue to work right. Partial fix for bug 6404; fix on 0.2.2.6-alpha. --- changes/bug6404 | 5 +++++ src/or/dirvote.c | 13 ++++++++++++- 2 files changed, 17 insertions(+), 1 deletions(-) diff --git a/changes/bug6404 b/changes/bug6404 index d01964d..64d4594 100644 --- a/changes/bug6404 +++ b/changes/bug6404 @@ -5,3 +5,8 @@ with complex policies or family declarations. Partial fix for bug 6404; fix on 0.2.2.6-alpha. + - Authorities no longer include any router in their + microdescriptor consensuses for which they couldn't generate or + agree on a microdescriptor. Partial fix for bug 6404; fix on + 0.2.2.6-alpha. + diff --git a/src/or/dirvote.c b/src/or/dirvote.c index 85ea85c..87af5be 100644 --- a/src/or/dirvote.c +++ b/src/or/dirvote.c @@ -54,7 +54,7 @@ static int dirvote_publish_consensus(void); static char *make_consensus_method_list(int low, int high, const char *sep); /** The highest consensus method that we currently support. */ -#define MAX_SUPPORTED_CONSENSUS_METHOD 12 +#define MAX_SUPPORTED_CONSENSUS_METHOD 13 /** Lowest consensus method that contains a 'directory-footer' marker */ #define MIN_METHOD_FOR_FOOTER 9 @@ -72,6 +72,10 @@ static char *make_consensus_method_list(int low, int high, const char *sep); * for a param. */ #define MIN_METHOD_FOR_MAJORITY_PARAMS 12 +/** Lowest consensus method where microdesc consensuses omit any entry + * with no microdesc. */ +#define MIN_METHOD_FOR_MANDATORY_MICRODESC 13 + /* ===== * Voting * =====*/ @@ -1935,6 +1939,13 @@ networkstatus_compute_consensus(smartlist_t *votes, } } + if (flavor == FLAV_MICRODESC && + consensus_method >= MIN_METHOD_FOR_MANDATORY_MICRODESC && + tor_digest256_is_zero(microdesc_digest)) { + /* With no microdescriptor digest, we omit the entry entirely. */ + continue; + } + { char buf[4096]; /* Okay!! Now we can write the descriptor... */

1 0

[tor/release-0.2.3] Warn at parse time for routerstatus entry missing a microdesc consensus
by arma＠torproject.org 04 Sep '12

04 Sep '12

commit 063138e001d3608b1e8b6619661d906cfea74ae0 Author: Nick Mathewson <nickm(a)torproject.org> Date: Tue Jul 31 11:00:18 2012 -0400 Warn at parse time for routerstatus entry missing a microdesc consensus In 0.2.3.18-rc, we started warning on this case while building a list of missing microdescriptor digests. That turned out to spam the logs; instead let's warn at parse time. Partial fix for bug 6404. --- changes/bug6404 | 4 ++++ src/or/microdesc.c | 7 +------ src/or/routerparse.c | 5 +++++ 3 files changed, 10 insertions(+), 6 deletions(-) diff --git a/changes/bug6404 b/changes/bug6404 index 64d4594..7708148 100644 --- a/changes/bug6404 +++ b/changes/bug6404 @@ -10,3 +10,7 @@ agree on a microdescriptor. Partial fix for bug 6404; fix on 0.2.2.6-alpha. + - Move log message when unable to find a microdesc in a + routerstatus entry to parse time. Previously we'd spam this + warning every time we tried to figure out which microdescriptors + to download. Partial fix for bug 6404; fix on 0.2.3.18-rc. diff --git a/src/or/microdesc.c b/src/or/microdesc.c index 9395a9a..c1ac1c3 100644 --- a/src/or/microdesc.c +++ b/src/or/microdesc.c @@ -643,13 +643,8 @@ microdesc_list_missing_digest256(networkstatus_t *ns, microdesc_cache_t *cache, continue; if (skip && digestmap_get(skip, rs->descriptor_digest)) continue; - if (tor_mem_is_zero(rs->descriptor_digest, DIGEST256_LEN)) { - log_info(LD_BUG, "Found an entry in networkstatus with no " - "microdescriptor digest. (Router %s=%s at %s:%d.)", - rs->nickname, hex_str(rs->identity_digest, DIGEST_LEN), - fmt_addr32(rs->addr), rs->or_port); + if (tor_mem_is_zero(rs->descriptor_digest, DIGEST256_LEN)) continue; - } /* XXXX Also skip if we're a noncache and wouldn't use this router. * XXXX NM Microdesc */ diff --git a/src/or/routerparse.c b/src/or/routerparse.c index 4231a17..8b69ad1 100644 --- a/src/or/routerparse.c +++ b/src/or/routerparse.c @@ -2201,6 +2201,11 @@ routerstatus_parse_entry_from_string(memarea_t *area, escaped(tok->args[0])); goto err; } + } else { + log_info(LD_BUG, "Found an entry in networkstatus with no " + "microdescriptor digest. (Router %s=%s at %s:%d.)", + rs->nickname, hex_str(rs->identity_digest, DIGEST_LEN), + fmt_addr32(rs->addr), rs->or_port); } }

1 0

[tor/release-0.2.3] Remove the upper limit on the size of MD we can generate.
by arma＠torproject.org 04 Sep '12

04 Sep '12

commit d3e1e458e11715a9fea2fea2cb228ff925c72851 Author: Nick Mathewson <nickm(a)torproject.org> Date: Tue Jul 31 13:12:07 2012 -0400 Remove the upper limit on the size of MD we can generate. --- src/or/dirvote.c | 34 +++++++++++++++++----------------- 1 files changed, 17 insertions(+), 17 deletions(-) diff --git a/src/or/dirvote.c b/src/or/dirvote.c index 87af5be..dc1ba7e 100644 --- a/src/or/dirvote.c +++ b/src/or/dirvote.c @@ -3513,9 +3513,9 @@ dirvote_create_microdescriptor(const routerinfo_t *ri) { microdesc_t *result = NULL; char *key = NULL, *summary = NULL, *family = NULL; - char buf[2048]; size_t keylen; - char *out = buf, *end = buf+sizeof(buf); + smartlist_t *chunks = smartlist_new(); + char *output; if (crypto_pk_write_public_key_to_string(ri->onion_pkey, &key, &keylen)<0) goto done; @@ -3523,23 +3523,19 @@ dirvote_create_microdescriptor(const routerinfo_t *ri) if (ri->declared_family) family = smartlist_join_strings(ri->declared_family, " ", 0, NULL); - if (tor_snprintf(out, end-out, "onion-key\n%s", key)<0) - goto done; - out += strlen(out); - if (family) { - if (tor_snprintf(out, end-out, "family %s\n", family)<0) - goto done; - out += strlen(out); - } - if (summary && strcmp(summary, "reject 1-65535")) { - if (tor_snprintf(out, end-out, "p %s\n", summary)<0) - goto done; - out += strlen(out); - } - *out = '\0'; /* Make sure it's nul-terminated. This should be a no-op */ + smartlist_add_asprintf(chunks, "onion-key\n%s", key); + + if (family) + smartlist_add_asprintf(chunks, "family %s\n", family); + + if (summary && strcmp(summary, "reject 1-65535")) + smartlist_add_asprintf(chunks, "p %s\n", summary); + + output = smartlist_join_strings(chunks, "", 0, NULL); { - smartlist_t *lst = microdescs_parse_from_string(buf, out, 0, 1); + smartlist_t *lst = microdescs_parse_from_string(output, + output+strlen(output), 0, 1); if (smartlist_len(lst) != 1) { log_warn(LD_DIR, "We generated a microdescriptor we couldn't parse."); SMARTLIST_FOREACH(lst, microdesc_t *, md, microdesc_free(md)); @@ -3554,6 +3550,10 @@ dirvote_create_microdescriptor(const routerinfo_t *ri) tor_free(key); tor_free(summary); tor_free(family); + if (chunks) { + SMARTLIST_FOREACH(chunks, char *, cp, tor_free(cp)); + smartlist_free(chunks); + } return result; }

1 0

[tor/release-0.2.3] Defensive programming: clear rs_out between iterations.
by arma＠torproject.org 04 Sep '12

04 Sep '12

commit 2d6d5db2fe4f8a4538c5bed903f7e1576e9eea40 Author: Nick Mathewson <nickm(a)torproject.org> Date: Wed Aug 1 17:25:34 2012 -0400 Defensive programming: clear rs_out between iterations. I can't currently find a bug here, but there are a couple of near-misses. Addresses ticket 6514; reported pseudonymously on IRC. --- changes/bug6514 | 5 +++++ src/or/dirvote.c | 1 + 2 files changed, 6 insertions(+), 0 deletions(-) diff --git a/changes/bug6514 b/changes/bug6514 new file mode 100644 index 0000000..84633bd --- /dev/null +++ b/changes/bug6514 @@ -0,0 +1,5 @@ + o Minor bugfixes: + - Add a (probably redundant) memory clear between iterations of + the router status voting loop, to prevent future coding errors + where data might leak between iterations of the loop. Resolves + ticket 6514. diff --git a/src/or/dirvote.c b/src/or/dirvote.c index 7995873..bc77973 100644 --- a/src/or/dirvote.c +++ b/src/or/dirvote.c @@ -1752,6 +1752,7 @@ networkstatus_compute_consensus(smartlist_t *votes, rs = compute_routerstatus_consensus(matching_descs, consensus_method, microdesc_digest); /* Copy bits of that into rs_out. */ + memset(&rs_out, 0, sizeof(rs_out)); tor_assert(fast_memeq(lowest_id, rs->status.identity_digest,DIGEST_LEN)); memcpy(rs_out.identity_digest, lowest_id, DIGEST_LEN); memcpy(rs_out.descriptor_digest, rs->status.descriptor_digest,

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