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.
6.3	$0-$5k	0.00

A vulnerability has been found in libav up to 11.4 (Multimedia Player Software) and classified as critical. Affected by this vulnerability is the function ff_h263_decode_mba of the file libavcodec/ituh263dec.c. The manipulation of the argument dimensions with an unknown input leads to a numeric error vulnerability. The CWE definition for the vulnerability is CWE-189. As an impact it is known to affect availability. The summary by CVE is:

The ff_h263_decode_mba function in libavcodec/ituh263dec.c in Libav before 11.5 allows remote attackers to cause a denial of service (divide-by-zero error and application crash) via a file with crafted dimensions.

The weakness was released 04/19/2016 by Agostino Sarubbo with Gentoo (Website). The advisory is shared at lists.opensuse.org. This vulnerability is known as CVE-2015-5479 since 07/10/2015. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 84815 (FreeBSD : libav -- divide by zero (a928960a-2bdc-11e5-86ff-14dae9d210b8)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 196441 (Ubuntu Security Notification for Libav Vulnerabilities (USN-2944-1)).

Upgrading to version 11.5 eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (84815).

Productinfo

Type

• Multimedia Player Software

Name

• libav

Version

• 11.0
• 11.1
• 11.2
• 11.3
• 11.4

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: 6.5
VulDB Meta Temp Score: 6.3

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

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: Numeric error
CWE: CWE-189
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: 84815
Nessus Name: FreeBSD : libav -- divide by zero (a928960a-2bdc-11e5-86ff-14dae9d210b8)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 841810
OpenVAS Name: Ubuntu Update for libav USN-2944-1
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: libav 11.5
Patch: 0a49a62f998747cfa564d98d36a459fe70d3299b

Timelineinfo

07/10/2015 🔍
07/16/2015 +6 days 🔍
07/16/2015 +0 days 🔍
07/17/2015 +1 days 🔍
04/19/2016 +277 days 🔍
04/19/2016 +0 days 🔍
04/20/2016 +1 days 🔍
07/25/2022 +2287 days 🔍

Sourcesinfo

Advisory: USN-2944-1
Researcher: Agostino Sarubbo
Organization: Gentoo
Status: Not defined
Confirmation: 🔍

CVE: CVE-2015-5479 (🔍)
SecurityFocus: 75932 - Libav 'ituh263dec.c' Divide-By-Zero Denial of Service Vulnerability

Entryinfo

Created: 04/20/2016 11:03
Updated: 07/25/2022 10:50
Changes: 04/20/2016 11:03 (52), 10/14/2018 08:50 (29), 07/25/2022 10:50 (6)
Complete: 🔍
Cache ID: 3:329:103

Discussion

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