fontconfig up to 2.12.0 Cache File double free

CVSS Meta Temp Score
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CTI Interest Score
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7.6$0-$5k0.00

A vulnerability was found in fontconfig up to 2.12.0 and classified as critical. This issue affects an unknown code block of the component Cache File Handler. The manipulation with an unknown input leads to a double free vulnerability. Using CWE to declare the problem leads to CWE-415. The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

fontconfig before 2.12.1 does not validate offsets, which allows local users to trigger arbitrary free calls and consequently conduct double free attacks and execute arbitrary code via a crafted cache file.

The weakness was published 08/13/2016 by Tobias Stoeckmann (Website). The advisory is shared at debian.org. The identification of this vulnerability is CVE-2016-5384 since 06/10/2016. The exploitation is known to be easy. An attack has to be approached locally. The requirement for exploitation is a simple authentication. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 92827 (Debian DLA-587-1 : fontconfig security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l.

Upgrading to version 2.12.1 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 (92827).

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

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

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.6

VulDB Base Score: 7.8
VulDB Temp Score: 7.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Double free
CWE: CWE-415 / CWE-119
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 92827
Nessus Name: Debian DLA-587-1 : fontconfig security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 870549
OpenVAS Name: Fedora Update for fontconfig FEDORA-2016-e23ab56ce3
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: fontconfig 2.12.1
Patch: cgit.freedesktop.org

Timelineinfo

06/10/2016 🔍
06/28/2016 +18 days 🔍
08/09/2016 +42 days 🔍
08/10/2016 +1 days 🔍
08/12/2016 +2 days 🔍
08/13/2016 +1 days 🔍
08/13/2016 +0 days 🔍
09/13/2022 +2222 days 🔍

Sourcesinfo

Advisory: USN-3063-1
Researcher: Tobias Stoeckmann
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-5384 (🔍)
OVAL: 🔍

SecurityFocus: 92339 - Fontconfig CVE-2016-5384 Local Privilege Escalation Vulnerability

Entryinfo

Created: 08/13/2016 20:58
Updated: 09/13/2022 17:58
Changes: 08/13/2016 20:58 (61), 03/26/2019 08:25 (14), 09/13/2022 17:50 (4), 09/13/2022 17:58 (1)
Complete: 🔍

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