FFmpeg up to 1.2.1 libavcodec/h264.c xchg_mb_border array index

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.8	$0-$5k	0.00

Summaryinfo

A vulnerability was found in FFmpeg up to 1.2.1 and classified as problematic. This impacts the function xchg_mb_border of the file libavcodec/h264.c. Executing a manipulation can lead to array index. Furthermore, an exploit is available. A patch should be applied to remediate this issue.

Detailsinfo

A vulnerability classified as problematic was found in FFmpeg up to 1.2.1 (Multimedia Processing Software). This vulnerability affects the function xchg_mb_border of the file libavcodec/h264.c. The manipulation with an unknown input leads to a array index vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect availability.

The weakness was published 07/02/2013 by Mateusz Jurczyk and Gynvael Coldwind with Google Security Team as h264: move 444 border xchg under if (deblock_top) as confirmed git commit (GIT Repository). The advisory is available at git.videolan.org. The vendor was not involved in the coordination of the public release. The exploitation appears to be difficult. The attack needs to be initiated within the local network. No form of authentication is required for a successful exploitation. Technical details and also a public exploit are known.

It is possible to download the exploit at thread.gmane.org. It is declared as proof-of-concept.

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 (94920†). Similar entry is available at VDB-9371. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

FFmpeg
Libav

Productinfo

Type

Multimedia Processing Software

Name

FFmpeg

Version

License

open-source

Website

Product: https://ffmpeg.org/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Array index
CWE: CWE-129 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: git.videolan.org

Timelineinfo

07/02/2013 🔍
07/02/2013 +0 days 🔍
07/10/2013 +8 days 🔍
05/06/2018 +1761 days 🔍

Sourcesinfo

Product: ffmpeg.org

Advisory: h264: move 444 border xchg under if (deblock_top)
Researcher: Mateusz Jurczyk, Gynvael Coldwind
Organization: Google Security Team
Status: Confirmed

GCVE (VulDB): GCVE-100-9370
OSVDB: 94920

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 07/10/2013 12:27
Updated: 05/06/2018 11:37
Changes: 07/10/2013 12:27 (52), 05/06/2018 11:37 (2)
Complete: 🔍
Committer:
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.