1. Ubuntu Security Notices
  2. USN-939-1

USN-939-1: X.org vulnerabilities

Publication date

18 May 2010

Overview

A remote attacker could trigger a crash in X.org. In addition, the xvfb-run tool left the session cookie visible when launching X.org.

Releases

Packages

Details

Loïc Minier discovered that xvfb-run did not correctly keep the
X.org session cookie private. A local attacker could gain access
to any local sessions started by xvfb-run. Ubuntu 9.10 was not
affected. (CVE-2009-1573)

It was discovered that the X.org server did not correctly handle
certain calculations. A remote attacker could exploit this to
crash the X.org session or possibly run arbitrary code with root
privileges. (CVE-2010-1166)

Loïc Minier discovered that xvfb-run did not correctly keep the
X.org session cookie private. A local attacker could gain access
to any local sessions started by xvfb-run. Ubuntu 9.10 was not
affected. (CVE-2009-1573)

It was discovered that the X.org server did not correctly handle
certain calculations. A remote attacker could exploit this to
crash the X.org session or possibly run arbitrary code with root
privileges. (CVE-2010-1166)

Update instructions

After a standard system update you need to restart your session to make all 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
9.10 karmic xserver-xorg-core –  2:1.6.4-2ubuntu4.3
9.04 jaunty xserver-xorg-core –  2:1.6.0-0ubuntu14.2
xvfb –  2:1.6.0-0ubuntu14.2
8.04 hardy xserver-xorg-core –  2:1.4.1~git20080131-1ubuntu9.3
xvfb –  2:1.4.1~git20080131-1ubuntu9.3

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References

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