VDB-12164 · OSVDB 102889 · GCVE-100-12164

FFmpeg 2.1 libavcodec/vc1.c ff_vc1_parse_frame_header null pointer dereference

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.
5.7	$0-$5k	0.00

Summaryinfo

A vulnerability described as problematic has been identified in FFmpeg 2.1. This impacts the function ff_vc1_parse_frame_header of the file libavcodec/vc1.c. Such manipulation leads to null pointer dereference. There is no exploit available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability was found in FFmpeg 2.1 (Multimedia Processing Software) and classified as problematic. Affected by this issue is the function ff_vc1_parse_frame_header of the file libavcodec/vc1.c. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability.

The issue has been introduced in 10/29/2013. The weakness was shared 02/01/2014 by Mateusz Jurczyk and Gynvael Coldwind with Google Security Team as avcodec/vc1: reset fcm/field_mode in non advanced header parsing as confirmed git commit (GIT Repository). The advisory is shared for download at git.videolan.org. The vendor cooperated in the coordination of the public release. 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 vulnerability was handled as a non-public zero-day exploit for at least 95 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 (102889†). The entries VDB-12167, VDB-12166, VDB-12165 and VDB-12163 are related to this item. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

FFmpeg 2.1
Libav 0.8.9

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: 5.9
VulDB Meta Temp Score: 5.7

VulDB Base Score: 5.9
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Patch: git.videolan.org

Timelineinfo

10/29/2013 🔍
02/01/2014 +95 days 🔍
02/01/2014 +0 days 🔍
02/06/2014 +5 days 🔍
04/18/2019 +1897 days 🔍

Sourcesinfo

Product: ffmpeg.org

Advisory: avcodec/vc1: reset fcm/field_mode in non advanced header parsing
Researcher: Mateusz Jurczyk, Gynvael Coldwind
Organization: Google Security Team
Status: Confirmed
Coordinated: 🔍

GCVE (VulDB): GCVE-100-12164
OSVDB: 102889

See also: 🔍

Entryinfo

Created: 02/06/2014 09:55
Updated: 04/18/2019 12:16
Changes: 02/06/2014 09:55 (50), 04/18/2019 12:16 (2)
Complete: 🔍
Cache ID: 216:9D7:103