December 2017 - tor-commits - lists.torproject.org

[tor/maint-0.2.9] Use local descriptor object to exclude self in path selection
by nickm＠torproject.org 01 Dec '17

01 Dec '17

commit 6ab07419c88e35c6d8610e20fb3cea16e39c8acd Author: David Goulet <dgoulet(a)torproject.org> Date: Tue Nov 28 19:02:00 2017 -0500 Use local descriptor object to exclude self in path selection TROVE-2017-12. Severity: Medium When choosing a random node for a circuit, directly use our router descriptor to exclude ourself instead of the one in the global descriptor list. That list could be empty because tor could be downloading them which could lead to not excluding ourself. Closes #21534 --- changes/trove-2017-012-part1 | 6 ++++++ src/or/routerlist.c | 5 ++++- 2 files changed, 10 insertions(+), 1 deletion(-) diff --git a/changes/trove-2017-012-part1 b/changes/trove-2017-012-part1 new file mode 100644 index 000000000..9fccc2cf6 --- /dev/null +++ b/changes/trove-2017-012-part1 @@ -0,0 +1,6 @@ + o Major bugfixes (security, relay): + - When running as a relay, make sure that we never build a path through + ourselves, even in the case where we have somehow lost the version of + our descriptor appearing in the consensus. Fixes part of bug 21534; + bugfix on 0.2.0.1-alpha. This issue is also tracked as TROVE-2017-012 + and CVE-2017-8822. diff --git a/src/or/routerlist.c b/src/or/routerlist.c index 07e87724b..3bf1eb895 100644 --- a/src/or/routerlist.c +++ b/src/or/routerlist.c @@ -2411,7 +2411,10 @@ router_choose_random_node(smartlist_t *excludedsmartlist, }); } - if ((r = routerlist_find_my_routerinfo())) + /* If the node_t is not found we won't be to exclude ourself but we + * won't be able to pick ourself in router_choose_random_node() so + * this is fine to at least try with our routerinfo_t object. */ + if ((r = router_get_my_routerinfo())) routerlist_add_node_and_family(excludednodes, r); router_add_running_nodes_to_smartlist(sl, allow_invalid,

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[tor/maint-0.2.9] bump to 0.2.5.16
by nickm＠torproject.org 01 Dec '17

01 Dec '17

commit 6bda6777c1e86a54dedafd1fadd6142b1ff4955a Author: Nick Mathewson <nickm(a)torproject.org> Date: Thu Nov 30 12:19:48 2017 -0500 bump to 0.2.5.16 --- configure.ac | 2 +- contrib/win32build/tor-mingw.nsi.in | 2 +- src/win32/orconfig.h | 2 +- 3 files changed, 3 insertions(+), 3 deletions(-) diff --git a/configure.ac b/configure.ac index 317778275..67fddd7b4 100644 --- a/configure.ac +++ b/configure.ac @@ -3,7 +3,7 @@ dnl Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson dnl Copyright (c) 2007-2013, The Tor Project, Inc. dnl See LICENSE for licensing information -AC_INIT([tor],[0.2.5.15-dev]) +AC_INIT([tor],[0.2.5.16]) AC_CONFIG_SRCDIR([src/or/main.c]) AC_CONFIG_MACRO_DIR([m4]) AM_INIT_AUTOMAKE diff --git a/contrib/win32build/tor-mingw.nsi.in b/contrib/win32build/tor-mingw.nsi.in index 6dc7cbd76..c88262afa 100644 --- a/contrib/win32build/tor-mingw.nsi.in +++ b/contrib/win32build/tor-mingw.nsi.in @@ -8,7 +8,7 @@ !include "LogicLib.nsh" !include "FileFunc.nsh" !insertmacro GetParameters -!define VERSION "0.2.5.15-dev" +!define VERSION "0.2.5.16" !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 5ba3ec194..87ba1f11a 100644 --- a/src/win32/orconfig.h +++ b/src/win32/orconfig.h @@ -241,7 +241,7 @@ #define USING_TWOS_COMPLEMENT /* Version number of package */ -#define VERSION "0.2.5.15-dev" +#define VERSION "0.2.5.16"

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[tor/maint-0.3.0] Fix length of replaycache-checked data.
by nickm＠torproject.org 01 Dec '17

01 Dec '17

commit 2834cc9c18230c36278ffa94a252abeb91b6cff9 Author: Nick Mathewson <nickm(a)torproject.org> Date: Sat Nov 11 13:40:21 2017 -0500 Fix length of replaycache-checked data. This is a regression; we should have been checking only the public-key encrypted portion. Fixes bug 24244, TROVE-2017-009, and CVE-2017-8819. --- changes/trove-2017-009 | 10 ++++++++++ src/or/rendservice.c | 4 +++- 2 files changed, 13 insertions(+), 1 deletion(-) diff --git a/changes/trove-2017-009 b/changes/trove-2017-009 new file mode 100644 index 000000000..512d18c29 --- /dev/null +++ b/changes/trove-2017-009 @@ -0,0 +1,10 @@ + o Major fixes (security): + - When checking for replays in the INTRODUCE1 cell data for a (legacy) + hiddden service, correctly detect replays in the RSA-encrypted part of + the cell. We were previously checking for replays on the entire cell, + but those can be circumvented due to the malleability of Tor's legacy + hybrid encryption. This fix helps prevent a traffic confirmation + attack. Fixes bug 24244; bugfix on 0.2.4.1-alpha. This issue is also + tracked as TROVE-2017-009 and CVE-2017-8819. + + diff --git a/src/or/rendservice.c b/src/or/rendservice.c index d958de9df..ba8891ead 100644 --- a/src/or/rendservice.c +++ b/src/or/rendservice.c @@ -1162,6 +1162,7 @@ rend_service_introduce(origin_circuit_t *circuit, const uint8_t *request, time_t now = time(NULL); time_t elapsed; int replay; + size_t keylen; /* Do some initial validation and logging before we parse the cell */ if (circuit->base_.purpose != CIRCUIT_PURPOSE_S_INTRO) { @@ -1245,9 +1246,10 @@ rend_service_introduce(origin_circuit_t *circuit, const uint8_t *request, } /* check for replay of PK-encrypted portion. */ + keylen = crypto_pk_keysize(intro_key); replay = replaycache_add_test_and_elapsed( intro_point->accepted_intro_rsa_parts, - parsed_req->ciphertext, parsed_req->ciphertext_len, + parsed_req->ciphertext, MIN(parsed_req->ciphertext_len, keylen), &elapsed); if (replay) {

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[tor/maint-0.2.9] Merge branch 'maint-0.2.5' into maint-0.2.8
by nickm＠torproject.org 01 Dec '17

01 Dec '17

commit 2e219291bee2d378344286ba091ba09527b07188 Merge: ba4a9cf0c 6bda6777c Author: Nick Mathewson <nickm(a)torproject.org> Date: Thu Nov 30 12:21:36 2017 -0500 Merge branch 'maint-0.2.5' into maint-0.2.8 "ours" to avoid version bump

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[tor/maint-0.2.9] Merge branch 'maint-0.2.8' into maint-0.2.9
by nickm＠torproject.org 01 Dec '17

01 Dec '17

commit 7e2b012b46a4ade2818e47be15d76255cf6f121e Merge: 52d7af631 ba4a9cf0c Author: Nick Mathewson <nickm(a)torproject.org> Date: Thu Nov 30 12:07:59 2017 -0500 Merge branch 'maint-0.2.8' into maint-0.2.9 changes/bug24313 | 5 +++++ changes/trove-2017-009 | 10 ++++++++++ changes/trove-2017-011 | 8 ++++++++ changes/trove-2017-012-part1 | 6 ++++++ src/common/crypto.c | 16 +++++++++++++--- src/or/rendservice.c | 8 +++++++- src/or/routerlist.c | 5 ++++- 7 files changed, 53 insertions(+), 5 deletions(-)

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[tor/maint-0.2.9] Merge branch 'maint-0.2.5' into maint-0.2.8
by nickm＠torproject.org 01 Dec '17

01 Dec '17

commit ba4a9cf0c094b7a19e1bf44264b1244a23a4b38e Merge: 3030741b5 f49876d66 Author: Nick Mathewson <nickm(a)torproject.org> Date: Thu Nov 30 12:07:59 2017 -0500 Merge branch 'maint-0.2.5' into maint-0.2.8 changes/trove-2017-009 | 10 ++++++++++ changes/trove-2017-011 | 8 ++++++++ changes/trove-2017-012-part1 | 6 ++++++ src/common/crypto.c | 16 +++++++++++++--- src/or/rendservice.c | 4 +++- src/or/routerlist.c | 5 ++++- 6 files changed, 44 insertions(+), 5 deletions(-)

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[tor/maint-0.2.9] hs-v2: Remove any expiring intro from the retry list
by nickm＠torproject.org 01 Dec '17

01 Dec '17

commit 3030741b5d24e9ae36e6d72c6a8c7d035fde9d2a Author: David Goulet <dgoulet(a)torproject.org> Date: Tue Nov 21 10:16:08 2017 -0500 hs-v2: Remove any expiring intro from the retry list TROVE-2017-13. Severity: High. In the unlikely case that a hidden service could be missing intro circuit(s), that it didn't have enough directory information to open new circuits and that an intro point was about to expire, a use-after-free is possible because of the intro point object being both in the retry list and expiring list at the same time. The intro object would get freed after the circuit failed to open and then access a second time when cleaned up from the expiring list. Fixes #24313 --- changes/bug24313 | 5 +++++ src/or/rendservice.c | 4 ++++ 2 files changed, 9 insertions(+) diff --git a/changes/bug24313 b/changes/bug24313 new file mode 100644 index 000000000..b927ec3ba --- /dev/null +++ b/changes/bug24313 @@ -0,0 +1,5 @@ + o Major bugfixes (security, hidden service v2): + - Fix a use-after-free error that could crash v2 Tor hidden services + when it failed to open circuits while expiring introductions + points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This + issue is also tracked as TROVE-2017-013 and CVE-2017-8823. diff --git a/src/or/rendservice.c b/src/or/rendservice.c index 0a5b5efd5..cbf998136 100644 --- a/src/or/rendservice.c +++ b/src/or/rendservice.c @@ -3444,6 +3444,10 @@ remove_invalid_intro_points(rend_service_t *service, log_info(LD_REND, "Expiring %s as intro point for %s.", safe_str_client(extend_info_describe(intro->extend_info)), safe_str_client(service->service_id)); + /* We might have put it in the retry list if so, undo. */ + if (retry_nodes) { + smartlist_remove(retry_nodes, intro); + } smartlist_add(service->expiring_nodes, intro); SMARTLIST_DEL_CURRENT(service->intro_nodes, intro); /* Intro point is expired, we need a new one thus don't consider it

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[tor/maint-0.2.9] Merge branch 'trove-2017-011_025' into maint-0.2.5
by nickm＠torproject.org 01 Dec '17

01 Dec '17

commit 08ce39fb0fd50ab0da4201201fa07e7776cb09e7 Merge: a6a0c7a4e 1880a6a88 Author: Nick Mathewson <nickm(a)torproject.org> Date: Thu Nov 30 12:06:17 2017 -0500 Merge branch 'trove-2017-011_025' into maint-0.2.5 changes/trove-2017-011 | 8 ++++++++ src/common/crypto.c | 16 +++++++++++++--- 2 files changed, 21 insertions(+), 3 deletions(-)

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[tor/maint-0.2.9] Merge branch 'trove-2017-009_025' into maint-0.2.5
by nickm＠torproject.org 01 Dec '17

01 Dec '17

commit a6a0c7a4ecc22a744b123a47d466963f6023a11f Merge: 831d3b794 75509dc82 Author: Nick Mathewson <nickm(a)torproject.org> Date: Thu Nov 30 12:05:59 2017 -0500 Merge branch 'trove-2017-009_025' into maint-0.2.5 changes/trove-2017-009 | 10 ++++++++++ src/or/rendservice.c | 4 +++- 2 files changed, 13 insertions(+), 1 deletion(-)

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[tor/maint-0.2.9] Merge branch 'trove-2017-012_025' into maint-0.2.5
by nickm＠torproject.org 01 Dec '17

01 Dec '17

commit f49876d66efbc5679ba7d9d9c6538c763b8e06b5 Merge: 08ce39fb0 6ab07419c Author: Nick Mathewson <nickm(a)torproject.org> Date: Thu Nov 30 12:06:21 2017 -0500 Merge branch 'trove-2017-012_025' into maint-0.2.5 changes/trove-2017-012-part1 | 6 ++++++ src/or/routerlist.c | 5 ++++- 2 files changed, 10 insertions(+), 1 deletion(-)

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