X.Org libFS 1.0.1/1.0.2/1.0.3/1.0.4 Graphical Library FSOpenServer memory corruption

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8.6$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in X.Org libFS 1.0.1/1.0.2/1.0.3/1.0.4. This affects the function FSOpenServer of the component Graphical Library. The manipulation leads to memory corruption. This vulnerability is referenced as CVE-2013-1996. Furthermore, an exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in X.Org libFS 1.0.1/1.0.2/1.0.3/1.0.4. This issue affects the function FSOpenServer of the component Graphical Library. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

X.org libFS 1.0.4 and earlier allows X servers to trigger allocation of insufficient memory and a buffer overflow via vectors related to an unexpected sign extension in the FSOpenServer function.

The weakness was published 05/23/2013 by Ilja van Sprundel with IOActive as not defined advisory (Website). The advisory is shared at x.org. The public release has been coordinated with X.Org. The identification of this vulnerability is CVE-2013-1996 since 02/19/2013. The exploitation is known to be difficult. The attack may be initiated remotely. A simple authentication is required for exploitation. Technical details as well as a private exploit are known.

The vulnerability scanner Nessus provides a plugin with the ID 67392 (Fedora 19 : libFS-1.0.5-1.fc19 (2013-9976)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 167200 (SUSE Enterprise Linux Security Update for xorg-x11-libs (SUSE-SU-2014:0881-1)).

Upgrading to version 1.0.5 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at cgit.freedesktop.org. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (84518), Tenable (67392), SecurityFocus (BID 60130†), OSVDB (93662†) and Secunia (SA53504†). Similar entries are available at VDB-8875, VDB-8876, VDB-8877 and VDB-8878. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.9
VulDB Meta Temp Score: 8.6

VulDB Base Score: 9.9
VulDB Temp Score: 8.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Private
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 67392
Nessus Name: Fedora 19 : libFS-1.0.5-1.fc19 (2013-9976)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 892687
OpenVAS Name: Debian Security Advisory DSA 2687-1 (libfs - several vulnerabilities
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: libFS 1.0.5
Patch: cgit.freedesktop.org

Timelineinfo

02/19/2013 🔍
04/26/2013 +66 days 🔍
05/23/2013 +27 days 🔍
05/23/2013 +0 days 🔍
05/23/2013 +0 days 🔍
05/24/2013 +1 days 🔍
05/27/2013 +3 days 🔍
06/10/2013 +14 days 🔍
06/15/2013 +5 days 🔍
07/12/2013 +27 days 🔍
05/14/2021 +2863 days 🔍

Sourcesinfo

Vendor: x.org

Advisory: x.org
Researcher: Ilja van Sprundel
Organization: IOActive
Status: Not defined
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2013-1996 (🔍)
GCVE (CVE): GCVE-0-2013-1996
GCVE (VulDB): GCVE-100-8885

OVAL: 🔍

X-Force: 84518
SecurityFocus: 60130 - X.Org libFS 'FSOpenServer()' Memory Corruption Vulnerability
Secunia: 53504 - Debian update for libfs, Less Critical
OSVDB: 93662
Vulnerability Center: 39935 - libFS Through 1.0.4 Remote Code Execution due to Sign Extension Problems in FSOpenServer(), Medium

See also: 🔍

Entryinfo

Created: 05/27/2013 17:44
Updated: 05/14/2021 07:42
Changes: 05/27/2013 17:44 (85), 05/02/2017 08:34 (4), 05/14/2021 07:42 (3)
Complete: 🔍
Committer:
Cache ID: 216::103

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