libass up to 0.13.3 ass_render.c wrap_lines_smart out-of-bounds

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

Summaryinfo

A vulnerability has been found in libass up to 0.13.3 and classified as problematic. This impacts the function wrap_lines_smart of the file ass_render.c. This manipulation causes out-of-bounds. This vulnerability appears as CVE-2016-7969. The attack may be initiated remotely. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in libass up to 0.13.3. It has been declared as problematic. Affected by this vulnerability is the function wrap_lines_smart of the file ass_render.c. The manipulation with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect availability. The summary by CVE is:

The wrap_lines_smart function in ass_render.c in libass before 0.13.4 allows remote attackers to cause a denial of service (out-of-bounds read) via unspecified vectors, related to "0/3 line wrapping equalization."

The bug was discovered 10/04/2016. The weakness was presented 03/03/2017 by Brandon Perry (oss-sec). The advisory is shared at openwall.com. This vulnerability is known as CVE-2016-7969 since 09/09/2016. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available.

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 169583 (OpenSuSE Security Update for libass (openSUSE-SU-2016:3087-1)).

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†). See VDB-97514 and VDB-97515 for similar entries. Several companies clearly confirm that VulDB is the primary source for best 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

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
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-2016-7969 (🔍)
GCVE (CVE): GCVE-0-2016-7969
GCVE (VulDB): GCVE-100-97513
SecurityFocus: 93358 - libass Multiple Security Vulnerabilities
OSVDB: - CVE-2016-7969 - libass - Out-of-Bounds Read Issue

See also: 🔍

Entryinfo

Created: 03/04/2017 13:54
Updated: 09/03/2020 18:48
Changes: 03/04/2017 13:54 (78), 09/03/2020 18:48 (3)
Complete: 🔍
Cache ID: 216::103

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

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