Red Hat Bugzilla – Bug 444443
CVE-2008-2009 vorbis: insufficient validation of Huffman tree causing memory corruption in _make_decode_tree()
Last modified: 2008-05-14 03:38:21 EDT
Will Drewry of the Google Security Team created a set of fuzzed OGG test files
to test OGG Vorbis and Tremor implementations. Some of them were causing memory
corruption and crash on old libvorbis versions (prior to 1.0).
Crash / corruption occurred in _make_decode_tree(). This function was removed
prior to the release of upstream version 1.0 in following changes:
Test files do not crash libvobis revision 2960 or later.
Created attachment 303976 [details]
Patch from Monty (xiphmont)
Patch adds _check_words, a dry-run variant of _make_words, that does performs
huffman tree validation early in the stream decoding.
Similar additional checks were committed to libvorbis trunk to reject
underpopulated Huffman trees early in the file parsing:
This issue was addressed in:
Red Hat Enterprise Linux: