[gentoo-announce] [ GLSA 201207-04 ] X.Org X Server: Privilege escalation

[news 28]

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Gentoo Linux Security Advisory GLSA 201207-04

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http://security.gentoo.org/

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Severity: High

Title: X.Org X Server: Privilege escalation

Date: July 09, 2012

Bugs: #412609

ID: 201207-04

 

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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.

 

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

 

Description

===========

 

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.

 

Impact

======

 

A local attacker could gain escalated privileges or cause a Denial of

Service condition.

 

Workaround

==========

 

There is no known workaround at this time.

 

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:

 

http://security.gentoo.org/glsa/glsa-201207-04.xml

 

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 ( -at -) gentoo.org or alternatively, you may file a bug at

https://bugs.gentoo.org.

 

License

=======

 

Copyright 2012 Gentoo Foundation, Inc; referenced text

belongs to its owner(s).

 

The contents of this document are licensed under the

Creative Commons - Attribution / Share Alike license.

 

http://creativecommons.org/licenses/by-sa/2.5