Off-by-one error in the VP3 decoder (vp3.c) in FFmpeg 0.5 allows remote attackers to cause a denial of service and possibly execute arbitrary code via a crafted VP3 file that triggers an out-of-bounds read and possibly memory corruption.
https://roundup.ffmpeg.org/roundup/ffmpeg/issue1483
https://roundup.ffmpeg.org/roundup/ffmpeg/issue1240
http://www.securityfocus.com/bid/36465
http://www.debian.org/security/2010/dsa-2000