FFmpeg up to 1.2.1 libavcodec/vc1.c ff_vc1_parse_frame_header_adv 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.
8.4	$0-$5k	0.00

Summaryinfo

A vulnerability was found in FFmpeg up to 1.2.1. It has been declared as critical. This vulnerability affects the function ff_vc1_parse_frame_header_adv of the file libavcodec/vc1.c. Such manipulation leads to array index. There is not any exploit available. A patch should be applied to remediate this issue.

Detailsinfo

A vulnerability was found in FFmpeg up to 1.2.1 (Multimedia Processing Software). It has been rated as critical. Affected by this issue is the function ff_vc1_parse_frame_header_adv of the file libavcodec/vc1.c. 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, integrity, and availability.

The weakness was released 05/15/2013 by Mateusz Jurczyk and Gynvael Coldwind with Google Security Team as vc1dec: Do not allow field_mode to change after the first header as confirmed git commit (GIT Repository). The advisory is available at git.videolan.org. The public release was coordinated with the vendor. The exploitation is known to be difficult. Technical details are known, but there is no available exploit.

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 (94945†). Entries connected to this vulnerability are available at VDB-9389, VDB-9388, VDB-9387 and VDB-9385. 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: 8.8
VulDB Meta Temp Score: 8.4

VulDB Base Score: 8.8
VulDB Temp Score: 8.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
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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: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined
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

05/15/2013 🔍
05/15/2013 +0 days 🔍
07/10/2013 +56 days 🔍
05/07/2018 +1762 days 🔍

Sourcesinfo

Product: ffmpeg.org

Advisory: vc1dec: Do not allow field_mode to change after the first header
Researcher: Mateusz Jurczyk, Gynvael Coldwind
Organization: Google Security Team
Status: Confirmed
Coordinated: 🔍

GCVE (VulDB): GCVE-100-9386
OSVDB: 94945

See also: 🔍

Entryinfo

Created: 07/10/2013 13:15
Updated: 05/07/2018 08:58
Changes: 07/10/2013 13:15 (49), 05/07/2018 08:58 (2)
Complete: 🔍
Committer:
Cache ID: 216::103

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