Buffer overflow in FFmpeg - CVE-2012-0850

Vulnerability identifier: #VU43695

CSH Severity: Medium

CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2012-0850

CWE-ID: CWE-119

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote non-authenticated attacker to perform service disruption.

The sbr_qmf_synthesis function in libavcodec/aacsbr.c in FFmpeg before 0.9.1 allows remote attackers to cause a denial of service (application crash) via a crafted mpg file that triggers memory corruption involving the v_off variable, probably a buffer underflow.

FFmpeg
Ubuntu
libavcodec52 (Ubuntu package)
libavformat52 (Ubuntu package)
libavcodec53 (Ubuntu package)
libavformat53 (Ubuntu package)

Install update from vendor's website.

libavcodec52 (Ubuntu package) - update to 4:0.6.6-0ubuntu0.11.04.1
libavformat52 (Ubuntu package) - update to 4:0.6.6-0ubuntu0.11.04.1
libavcodec53 (Ubuntu package) - addressed in versions 4:0.7.6-0ubuntu0.11.10.1, 4:0.8.3-0ubuntu0.12.04.1
libavformat53 (Ubuntu package) - addressed in versions 4:0.7.6-0ubuntu0.11.10.1, 4:0.8.3-0ubuntu0.12.04.1

• http://ffmpeg.org/security.html
• http://git.videolan.org/?p=ffmpeg.git;a=commit;h=944f5b2779e4aa63f7624df6cd4de832a53db81b
• http://www.openwall.com/lists/oss-security/2012/02/01/11
• http://www.openwall.com/lists/oss-security/2012/02/14/4
• https://exchange.xforce.ibmcloud.com/vulnerabilities/78934

• Multiple vulnerabilities in ffmpeg.sourceforge.net FFmpeg
• Ubuntu update for libav