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Gentoo: GLSA-201207-04 High: X.Org X Server Privilege Escalation

gentoo
Calendar Grey July 9, 2012
Dist Gentoo Esm H88
A format string flaw in the X.Org X Server on Gentoo could lead to local privilege escalation or denial-of-service (DoS) attacks.
A format string vulnerability in X.Org X Server may allow local privilege escalation or Denial of Service.

Summary

The "LogVHdrMessageVerb()" function in log.c contains a format string vulnerability. NOTE: Exposure to this vulnerability is reduced in Gentoo due to X.Org X Server being built with "-D_FORTIFY_SOURCE=2" by default.

Topics%20covered

Topics Covered

security advisory denial of service high severity gentoo local escalation

Resolution

All X.Org X Server 1.11.x users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=x11-base/xorg-server-1.11.4-r1"
All X.Org X Server 1.10.x users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=x11-base/xorg-server-1.10.6-r1"
X.Org X Server 1.9.x is not affected.

References

[ 1 ] CVE-2012-2118 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-2118

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/201207-04
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Concerns

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.

Severity: High
Title: X.Org X Server: Privilege escalation
Date: July 09, 2012
Bugs: #412609
ID: 201207-04

Topics%20covered

Topics Covered

security advisory denial of service high severity gentoo local escalation

Synopsis

A format string vulnerability in X.Org X Server may allow local privilege escalation or Denial of Service.

Background

The X Window System is a graphical windowing system based on a client/server model.

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Affected Packages

------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 x11-base/xorg-server < 1.11.4-r1 >= 1.11.4-r1 *>= 1.10.6-r1 *<= 1.9.5-r1

Impact

===== A local attacker could gain escalated privileges or cause a Denial of Service condition.

Workaround

There is no known workaround at this time.

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