Summaryinfo

A vulnerability, which was classified as problematic, was found in FFmpeg 2.0. This vulnerability affects the function decode_residual_inter of the file libavcodec/cavsdec.c of the component Negative Coded Block Pattern Handler. Such manipulation leads to array index. There is no available exploit. It is best practice to apply a patch to resolve this issue.

Detailsinfo

A vulnerability, which was classified as critical, has been found in FFmpeg 2.0 (Multimedia Processing Software). Affected by this issue is the function decode_residual_inter of the file libavcodec/cavsdec.c of the component Negative Coded Block Pattern Handler. The manipulation with an unknown input leads to a array index vulnerability. Using CWE to declare the problem leads to CWE-129. The product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array. Impacted is confidentiality, and availability.

The issue has been introduced in 07/11/2013. The weakness was presented 10/13/2013 by Mateusz Jurczyk and Gynvael Coldwind with Google Security Team as cavs: Check for negative cbp as confirmed advisory (Website). The advisory is available at git.libav.org. The public release was coordinated in cooperation with the vendor. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 94 days. During that time the estimated underground price was around $0-$5k.

Applying the patch cavs: Check for negative cbp is able to eliminate this problem. The bugfix is ready for download at git.libav.org. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at OSVDB (98588†). git.libav.org is providing further details. See VDB-10837 for similar entry. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

• FFmpeg 2.0
• Libav 9.9

Productinfo

Type

• Multimedia Processing Software

Name

• FFmpeg

Version

• 2.0

License

• open-source

Website

• Product: https://ffmpeg.org/

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

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