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| author | Nick Mathewson <nickm@torproject.org> | 2012-11-08 16:45:46 -0500 |
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| committer | Nick Mathewson <nickm@torproject.org> | 2012-11-08 16:45:46 -0500 |
| commit | 9ad4776e6150a29fdfff607721599eb04c6e76d7 (patch) | |
| tree | 7189ed200ae8f47bf7d3399d0b99243dc93bced3 /changes | |
| parent | 758428dd32128874cefacc92ef63c1b5bc9a656e (diff) | |
| parent | 49dd5ef3a3d1775fdc3c0a7d069d3097b3baeeec (diff) | |
| download | tor-9ad4776e6150a29fdfff607721599eb04c6e76d7.tar tor-9ad4776e6150a29fdfff607721599eb04c6e76d7.tar.gz | |
Merge branch 'bug7352_023_rebased' into maint-0.2.3
Diffstat (limited to 'changes')
| -rw-r--r-- | changes/bug7352 | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/changes/bug7352 b/changes/bug7352 new file mode 100644 index 000000000..74a878dbe --- /dev/null +++ b/changes/bug7352 @@ -0,0 +1,12 @@ + o Major bugfixes: + - Tor tries to wipe potentially sensitive data after using it, so + that if some subsequent security failure exposes Tor's memory, + the damage will be limited. But we had a bug where the compiler + was eliminating these wipe operations when it decided that the + memory was no longer visible to a (correctly running) program, + hence defeating our attempt at defense in depth. We fix that + by using OpenSSL's OPENSSL_cleanse() operation, which a compiler + is unlikely to optimize away. Future versions of Tor may use + a less ridiculously heavy approach for this. Fixes bug 7352. + Reported in an article by Andrey Karpov. + |