#VU43700 Buffer overflow in FFmpeg and Libav - CVE-2011-3947

Vulnerability identifier: #VU43700

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-2011-3947

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.

Buffer overflow in mjpegbdec.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 MJPEG-B file.

Mitigation
Install update from vendor's website.

Vulnerable software versions

FFmpeg: 0.7.1 - 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=b57d262412204e54a7ef8fa1b23ff4dcede622e5
https://git.videolan.org/?p=ffmpeg.git;a=commit;h=b57d262412204e54a7ef8fa1b23ff4dcede622e5
https://libav.org/
https://secunia.com/advisories/49089
https://www.debian.org/security/2012/dsa-2471
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.