Multiple unspecified vulnerabilities in the (1) decode_band_hdr function in indeo4.c and (2) ff_ivi_decode_blocks function in ivi_common.c in libavcodec/ in FFmpeg before 0.11, and Libav 0.7.x before 0.7.7 and 0.8.x before 0.8.5, have unknown impact and attack vectors, related to the “transform size.”
ffmpeg.org/security.html
git.videolan.org/?p=ffmpeg.git;a=commitdiff;h=0846719dd11ab3f7a7caee13e7af71f71d913389
libav.org/releases/libav-0.7.7.changelog
libav.org/releases/libav-0.8.5.changelog
secunia.com/advisories/50468
www.openwall.com/lists/oss-security/2012/08/31/3
www.openwall.com/lists/oss-security/2012/09/02/4
www.securityfocus.com/bid/55355
www.ubuntu.com/usn/USN-1705-1