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USN-939-1: X.org vulnerabilities

18 May 2010

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.

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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)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 9.10
Ubuntu 9.04
Ubuntu 8.04

After a standard system update you need to restart your session to make
all the necessary changes.