VDB-96993 · CVE-2016-7499 · BID 93102

libav 11.7 MP3 File aacsbr.c sbr_make_f_master divide by zero

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.
5.2	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in libav 11.7. The affected element is the function sbr_make_f_master of the file aacsbr.c of the component MP3 File Handler. Performing a manipulation results in divide by zero. This vulnerability was named CVE-2016-7499. The attack may be initiated remotely. There is no available exploit. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability classified as problematic has been found in libav 11.7 (Multimedia Player Software). This affects the function sbr_make_f_master of the file aacsbr.c of the component MP3 File Handler. The manipulation with an unknown input leads to a divide by zero vulnerability. CWE is classifying the issue as CWE-369. The product divides a value by zero. This is going to have an impact on availability. The summary by CVE is:

The sbr_make_f_master function in aacsbr.c in Libav 11.7 allows remote attackers to cause a denial of service (divide-by-zero error and application crash) via a crafted mp3 file.

The bug was discovered 02/15/2017. The weakness was presented 02/15/2017 by Agostino Sarubbo with Gentoo (oss-sec). The advisory is shared at openwall.com. This vulnerability is uniquely identified as CVE-2016-7499 since 09/09/2016. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.libav.org.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 93102†). See VDB-96996, VDB-96995, VDB-96992 and VDB-96991 for similar entries. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Multimedia Player Software

Name

libav

Version

11.7

License

open-source

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Divide by zero
CWE: CWE-369 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
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

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: git.libav.org

Timelineinfo

09/09/2016 🔍
09/21/2016 +12 days 🔍
02/15/2017 +147 days 🔍
02/15/2017 +0 days 🔍
02/15/2017 +0 days 🔍
02/16/2017 +1 days 🔍
08/15/2020 +1276 days 🔍

Sourcesinfo

Advisory: openwall.com
Researcher: Agostino Sarubbo
Organization: Gentoo
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-7499 (🔍)
GCVE (CVE): GCVE-0-2016-7499
GCVE (VulDB): GCVE-100-96993
SecurityFocus: 93102 - Libav 'libavcodec/aacsbr.c' Divide-By-Zero Denial of Service Vulnerability
OSVDB: - CVE-2016-7499 - Libav - Denial of Service Issue

See also: 🔍

Entryinfo

Created: 02/16/2017 08:58
Updated: 08/15/2020 07:26
Changes: 02/16/2017 08:58 (63), 08/15/2020 07:26 (6)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.