The av_rescale_rnd function in the AVI demuxer in FFmpeg 0.5 allows remote attackers to cause a denial of service (crash) via a crafted AVI file that triggers a divide-by-zero error.
http://scarybeastsecurity.blogspot.com/2009/09/patching-ffmpeg-into-shape.html
http://secunia.com/advisories/36805
http://secunia.com/advisories/39482
http://www.mandriva.com/security/advisories?name=MDVSA-2011:059
http://www.mandriva.com/security/advisories?name=MDVSA-2011:060
http://www.mandriva.com/security/advisories?name=MDVSA-2011:061
http://www.mandriva.com/security/advisories?name=MDVSA-2011:088
http://www.mandriva.com/security/advisories?name=MDVSA-2011:112
http://www.ubuntu.com/usn/USN-931-1