libavcodec/mmvideo.c in FFmpeg before 2.4.2 does not consider all lines of HHV Intra blocks during validation of image height, which allows remote attackers to cause a denial of service (out-of-bounds access) or possibly have unspecified other impact via crafted MM video data.
http://git.videolan.org/?p=ffmpeg.git;a=commit;h=8b0e96e1f21b761ca15dbb470cd619a1ebf86c3e
Published: 2014-11-05
Base Score: 7.5
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P
Severity: High