1. Ubuntu Security Notices
  2. USN-571-1

USN-571-1: X.org vulnerabilities

Publication date

18 January 2008

Overview

X.org vulnerabilities

Releases

Packages

Details

Multiple overflows were discovered in the XFree86-Misc, XInput-Misc,
TOG-CUP, EVI, and MIT-SHM extensions which did not correctly validate
function arguments. An authenticated attacker could send specially
crafted requests and gain root privileges. (CVE-2007-5760, CVE-2007-6427,
CVE-2007-6428, CVE-2007-6429)

It was discovered that the X.org server did not use user privileges when
attempting to open security policy files. Local attackers could exploit
this to probe for files in directories they would not normally be able
to access. (CVE-2007-5958)

It was discovered that the PCF font handling code did not correctly
validate the size of fonts. An authenticated attacker could load a
specially crafted font and gain additional privileges. (

Multiple overflows were discovered in the XFree86-Misc, XInput-Misc,
TOG-CUP, EVI, and MIT-SHM extensions which did not correctly validate
function arguments. An authenticated attacker could send specially
crafted requests and gain root privileges. (CVE-2007-5760, CVE-2007-6427,
CVE-2007-6428, CVE-2007-6429)

It was discovered that the X.org server did not use user privileges when
attempting to open security policy files. Local attackers could exploit
this to probe for files in directories they would not normally be able
to access. (CVE-2007-5958)

It was discovered that the PCF font handling code did not correctly
validate the size of fonts. An authenticated attacker could load a
specially crafted font and gain additional privileges. (CVE-2008-0006)

Update instructions

After a standard system upgrade you need to restart your session to effect the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
7.10 gutsy libxfont1 –  1:1.3.0-0ubuntu1.1
xserver-xorg-core –  2:1.3.0.0.dfsg-12ubuntu8.1
7.04 feisty libxfont1 –  1:1.2.7-1ubuntu1.1
xserver-xorg-core –  2:1.2.0-3ubuntu8.1
6.10 edgy libxfont1 –  1:1.2.0-0ubuntu3.2
xserver-xorg-core –  1:1.1.1-0ubuntu12.3
6.06 dapper libxfont1 –  1:1.0.0-0ubuntu3.4
xserver-xorg-core –  1:1.0.2-0ubuntu10.8

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References

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