libavcodec/tiff.c in FFmpeg before 2.4.2 does not properly validate bits-per-pixel fields, which allows remote attackers to cause a denial of service (out-of-bounds access) or possibly have unspecified other impact via crafted TIFF data.
http://git.videolan.org/?p=ffmpeg.git;a=commit;h=e1c0cfaa419aa5d320540d5a1b3f8fd9b82ab7e5
http://www.ffmpeg.org/security.html