#VU43684 Buffer overflow in FFmpeg and Libav - CVE-2011-3945

Vulnerability identifier: #VU43684

Vulnerability risk: Medium

CVSSv4.0: 1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2011-3945

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
FFmpeg
Universal components / Libraries / Libraries used by multiple products
Libav
Client/Desktop applications / Multimedia software

Vendor: ffmpeg.sourceforge.net
Libav

Description

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

The decode_frame function in the KVG1 decoder (kgv1dec.c) in libavcodec in FFmpeg 0.7.x before 0.7.12 and 0.8.x before 0.8.11, and in Libav 0.5.x before 0.5.9, 0.6.x before 0.6.6, 0.7.x before 0.7.5, and 0.8.x before 0.8.1, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted media file.

Mitigation
Install update from vendor's website.

Vulnerable software versions

FFmpeg: 0.7 - 0.8.10

Libav: 0.5 - 0.8.10

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External links
https://ffmpeg.org/
https://git.libav.org/?p=libav.git;a=commit;h=a02e8df973f5478ec82f4c507f5b5b191a5ecb6b
https://git.videolan.org/?p=ffmpeg.git;a=commit;h=807a045ab7f51993a2c1b3116016cbbd4f3d20d6
https://libav.org/
https://www.mandriva.com/security/advisories?name=MDVSA-2012:076

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.