The Matroska format decoder in FFmpeg before 0.8.3 does not properly allocate memory, which allows remote attackers to execute arbitrary code via a crafted file.
secunia.com/advisories/45532
technet.microsoft.com/en-us/security/msvr/msvr11-011
ubuntu.com/usn/usn-1320-1
ubuntu.com/usn/usn-1333-1
www.ffmpeg.org/releases/ffmpeg-0.7.5.changelog
www.ffmpeg.org/releases/ffmpeg-0.8.4.changelog
www.mandriva.com/security/advisories?name=MDVSA-2012:074
www.mandriva.com/security/advisories?name=MDVSA-2012:075
www.mandriva.com/security/advisories?name=MDVSA-2012:076
www.osvdb.org/75621