#VU43701 Buffer overflow in FFmpeg and Libav - CVE-2011-3951

Vulnerability identifier: #VU43701

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-2011-3951

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 dpcm_decode_frame function in dpcm.c in libavcodec in FFmpeg before 0.10 and in Libav 0.5.x before 0.5.9, 0.6.x before 0.6.6, 0.7.x before 0.7.6, and 0.8.x before 0.8.1 allows remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via a crafted stereo stream in a media file.

Mitigation
Install update from vendor's website.

Vulnerable software versions

FFmpeg: 0.7.1 - 0.9

Libav: 0.5 - 0.9

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External links
https://ffmpeg.org/
https://git.libav.org/?p=libav.git;a=commit;h=ce7aee9b733134649a6ce2fa743e51733f33e67e
https://libav.org/
https://www.debian.org/security/2012/dsa-2494
https://www.ubuntu.com/usn/USN-1479-1

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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.