VDB-10268 · SA54857 · OSVDB 97312

FFmpeg 2.0 Huffman Codes libavcodec/smacker.c smacker_decode_header_tree Remote Code Execution

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.
5.4	$0-$5k	0.00

Summaryinfo

A vulnerability was found in FFmpeg 2.0. It has been declared as problematic. Impacted is the function smacker_decode_header_tree of the file libavcodec/smacker.c of the component Huffman Codes Handler. Such manipulation leads to an unknown weakness. There is no available exploit. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability was found in FFmpeg 2.0 (Multimedia Processing Software). It has been rated as problematic. Affected by this issue is the function smacker_decode_header_tree of the file libavcodec/smacker.c of the component Huffman Codes Handler. The impact remains unknown.

The issue has been introduced in 07/11/2013. The weakness was presented 09/11/2013 by Mateusz Jurczyk and Gynvael Coldwind with Google Security Team as smacker: Make sure we don't fill in huffman codes out of range as confirmed git commit (GIT Repository). The advisory is shared for download at git.libav.org. The public release was coordinated in cooperation 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 vulnerability was handled as a non-public zero-day exploit for at least 62 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.libav.org. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at OSVDB (97312†) and Secunia (SA54857†). See VDB-10267, VDB-10269, VDB-10271 and VDB-10272 for similar entries. Once again VulDB remains the best source for vulnerability data.

Affected

FFmpeg 2.0
Libav 9.9

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: 5.6
VulDB Meta Temp Score: 5.4

VulDB Base Score: 5.6
VulDB Temp Score: 5.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Remote Code Execution
CWE: Unknown
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

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.libav.org

Timelineinfo

07/11/2013 🔍
09/11/2013 +62 days 🔍
09/11/2013 +0 days 🔍
09/16/2013 +5 days 🔍
09/16/2013 +0 days 🔍
04/15/2019 +2037 days 🔍

Sourcesinfo

Product: ffmpeg.org

Advisory: smacker: Make sure we don't fill in huffman codes out of range
Researcher: Mateusz Jurczyk, Gynvael Coldwind
Organization: Google Security Team
Status: Confirmed
Coordinated: 🔍

GCVE (VulDB): GCVE-100-10268
Secunia: 54857 - FFmpeg Multiple Vulnerabilities, Highly Critical
OSVDB: 97312

See also: 🔍

Entryinfo

Created: 09/16/2013 10:13
Updated: 04/15/2019 18:43
Changes: 09/16/2013 10:13 (56), 04/15/2019 18:43 (1)
Complete: 🔍
Cache ID: 216::103