libass up to 0.13.3 libass/ass_shaper.c check_allocations Memory resource management

CVSS Meta Temp Score
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CTI Interest Score
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6.1$0-$5k0.00

Summaryinfo

A vulnerability was found in libass up to 0.13.3. It has been classified as problematic. Affected by this vulnerability is the function check_allocations of the file libass/ass_shaper.c. Performing a manipulation results in resource management (Memory). This vulnerability is known as CVE-2016-7972. Remote exploitation of the attack is possible. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic has been found in libass up to 0.13.3. This affects the function check_allocations of the file libass/ass_shaper.c. The manipulation with an unknown input leads to a resource management vulnerability (Memory). CWE is classifying the issue as CWE-399. This is going to have an impact on availability. The summary by CVE is:

The check_allocations function in libass/ass_shaper.c in libass before 0.13.4 allows remote attackers to cause a denial of service (memory allocation failure) via unspecified vectors.

The bug was discovered 10/04/2016. The weakness was published 03/03/2017 by Brandon Perry (oss-sec). It is possible to read the advisory at openwall.com. This vulnerability is uniquely identified as CVE-2016-7972 since 09/09/2016. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 139 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 97268 (GLSA-201702-25 : libass: Multiple vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Gentoo Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 169432 (SUSE Enterprise Linux Security Update for libass (SUSE-SU-2016:3107-1)).

Upgrading to version 0.13.4 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (97268) and SecurityFocus (BID 93358†). Similar entries are available at VDB-97513 and VDB-97514. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

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

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Name: Memory
Class: Resource management / Memory
CWE: CWE-399 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 97268
Nessus Name: GLSA-201702-25 : libass: Multiple vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 53404
OpenVAS Name: Fedora Update for libass FEDORA-2016-d2a05a0644
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: libass 0.13.4

Timelineinfo

09/09/2016 🔍
10/04/2016 +25 days 🔍
10/04/2016 +0 days 🔍
02/20/2017 +139 days 🔍
02/21/2017 +1 days 🔍
03/03/2017 +10 days 🔍
03/03/2017 +0 days 🔍
03/04/2017 +1 days 🔍
09/03/2020 +1279 days 🔍

Sourcesinfo

Advisory: openwall.com
Researcher: Brandon Perry
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-7972 (🔍)
GCVE (CVE): GCVE-0-2016-7972
GCVE (VulDB): GCVE-100-97515
SecurityFocus: 93358 - libass Multiple Security Vulnerabilities
OSVDB: - CVE-2016-7972 - libass - Denial of Service Issue

See also: 🔍

Entryinfo

Created: 03/04/2017 13:55
Updated: 09/03/2020 20:18
Changes: 03/04/2017 13:55 (79), 09/03/2020 20:18 (3)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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