X.Org X Server: Privilege escalation — GLSA 201207-04

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

Affected packages

Background

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

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

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=x11-base/xorg-server-1.11.4-r1"
 

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=x11-base/xorg-server-1.10.6-r1"
 

References

• CVE-2012-2118

Release date
July 09, 2012

Latest revision
July 09, 2012: 1

Severity
high

Exploitable
local

Bugzilla entries

• 412609