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.
7.0	$0-$5k	0.00

A vulnerability has been found in libav up to 0.8 (Multimedia Player Software) and classified as critical. Affected by this vulnerability is the function decode_init of the file kmvc.c. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

The decode_init function in kmvc.c in libavcodec in FFmpeg before 0.10 and in Libav 0.5.x before 0.5.9, 0.6.x before 0.6.6, 0.7.x before 0.7.6, and 0.8.x before 0.8.1 allows remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via a large palette size in a KMVC encoded file.

The weakness was shared 08/20/2012 as confirmed git commit (GIT Repository). It is possible to read the advisory at git.libav.org. This vulnerability is known as CVE-2011-3952 since 10/01/2011. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 59772 (Debian DSA-2494-1 : ffmpeg - several vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks.

Upgrading to version 0.8 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.libav.org. The best possible mitigation is suggested to be patching the affected component.

The vulnerability is also documented in the vulnerability database at Tenable (59772). The entries 61721, 61720, 61719 and 61718 are related to this item.

Productinfo

Type

• Multimedia Player Software

Name

• libav

Version

• 0.5
• 0.5.1
• 0.5.2
• 0.5.3
• 0.6
• 0.6.1
• 0.6.2
• 0.6.3
• 0.7
• 0.7.1
• 0.7.2
• 0.7.3
• 0.7.4
• 0.7.5
• 0.8

License

• open-source

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
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: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Nessus ID: 59772
Nessus Name: Debian DSA-2494-1 : ffmpeg - several vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 71472
OpenVAS Name: Debian Security Advisory DSA 2494-1 (ffmpeg)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Upgrade: libav 0.8
Patch: 386741f887714d3e46c9e8fe577e326a7964037b

Timelineinfo

10/01/2011 🔍
08/20/2012 +324 days 🔍
08/20/2012 +0 days 🔍
08/20/2012 +0 days 🔍
09/24/2012 +35 days 🔍
03/23/2015 +910 days 🔍
12/08/2021 +2452 days 🔍

Sourcesinfo

Advisory: DSA-2494
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2011-3952 (🔍)
OVAL: 🔍

Vulnerability Center: 36206 - FFmpeg and Libav \x27decode_init\x27 Function Allows Remote DoS \\ Code Execution via a Crafted KMVC File, Medium
SecurityFocus: 51307

See also: 🔍

Entryinfo

Created: 03/23/2015 16:50
Updated: 12/08/2021 02:13
Changes: 03/23/2015 16:50 (59), 04/17/2017 11:15 (9), 12/08/2021 02:04 (4), 12/08/2021 02:13 (3)
Complete: 🔍

Discussion

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