FFmpeg 2.1 Dimension libavcodec/hnm4video.c hnm_decode_init memory corruption

Summaryinfo

A vulnerability classified as critical was found in FFmpeg 2.1. Affected by this vulnerability is the function hnm_decode_init of the file libavcodec/hnm4video.c of the component Dimension Handler. Such manipulation leads to memory corruption. There is not any exploit available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability, which was classified as very critical, has been found in FFmpeg 2.1 (Multimedia Processing Software). Affected by this issue is the function hnm_decode_init of the file libavcodec/hnm4video.c of the component Dimension Handler. 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 released 11/22/2013 by Mateusz Jurczyk and Gynvael Coldwind with Google Security Team as avcodec/hnm4video: check dimensions for validity as confirmed git commit (GIT Repository). The advisory is shared for download at git.videolan.org. The public release was coordinated with the vendor. The exploitation is known to be difficult. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 04/17/2019).

The vulnerability was handled as a non-public zero-day exploit for at least 24 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 (100537†). Entries connected to this vulnerability are available at VDB-11400, VDB-11399, VDB-11398 and VDB-11397. Once again VulDB remains the best 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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Once again VulDB remains the best source for vulnerability data.

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