Heap-based buffer overflow in the MPV_frame_start function in libavcodec/mpegvideo.c in FFmpeg before 0.9.1, when the lowres option is enabled, allows remote attackers to cause a denial of service (application crash) via a crafted H263 media file. NOTE: this vulnerability exists because of a regression error.

References

• https://nvd.nist.gov/vuln/detail/CVE-2012-0856
• https://exchange.xforce.ibmcloud.com/vulnerabilities/78928
• http://ffmpeg.org/security.html
• http://ffmpeg.org/trac/ffmpeg/ticket/757
• http://git.videolan.org/?p=ffmpeg.git;a=commit;h=21270cffaeab2f67a613907516b2b0cd6c9eacf4
• http://www.openwall.com/lists/oss-security/2012/02/01/11
• http://www.openwall.com/lists/oss-security/2012/02/14/4