Google Chrome before 23.0.1271.97, and Libav 0.7.x before 0.7.7 and 0.8.x before 0.8.5, do not properly perform AAC decoding, which allows remote attackers to cause a denial of service (stack memory corruption) or possibly have unspecified other impact via vectors related to "an off-by-one overwrite when switching to LTP profile from MAIN."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16007
https://code.google.com/p/chromium/issues/detail?id=161639
http://www.ubuntu.com/usn/USN-1705-1
http://lists.opensuse.org/opensuse-updates/2012-12/msg00073.html
http://libav.org/releases/libav-0.8.5.changelog
http://libav.org/releases/libav-0.7.7.changelog
http://googlechromereleases.blogspot.com/2012/12/stable-channel-update.html