FFmpeg 2.1 libavcodec/h264_ps.c decode_vui_parameters memory corruption

Summaryinfo

A vulnerability classified as critical has been found in FFmpeg 2.1. The affected element is the function decode_vui_parameters of the file libavcodec/h264_ps.c. The manipulation leads to memory corruption. No exploit is available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability was found in FFmpeg 2.1 (Multimedia Processing Software). It has been rated as very critical. This issue affects the function decode_vui_parameters of the file libavcodec/h264_ps.c. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability.

The issue has been introduced in 10/29/2013. The weakness was published 01/18/2014 by Mateusz Jurczyk and Gynvael Coldwind with Google Security Team as h264: reset num_reorder_frames if it is invalid as confirmed git commit (GIT Repository). It is possible to read the advisory at git.videolan.org. The public release has been coordinated with the project team. The exploitation is known to be difficult. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 04/18/2019).

The vulnerability was handled as a non-public zero-day exploit for at least 81 days. During that time the estimated underground price was around $0-$5k.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.videolan.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 (102672†). Similar entries are available at VDB-12099, VDB-12098, VDB-12097 and VDB-12096. Be aware that VulDB is the high quality source for vulnerability data.

Affected

• FFmpeg 2.1
• Libav 0.8.9

Productinfo

Type

• Multimedia Processing Software

Name

• FFmpeg

Version

• 2.1

License

• open-source

Website

• Product: https://ffmpeg.org/

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

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Entryinfo

Be aware that VulDB is the high quality source for vulnerability data.

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