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USN-2500-1: X.Org X server vulnerabilities

17 February 2015

Several security issues were fixed in the X.Org X server.

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Releases

Packages

Details

Olivier Fourdan discovered that the X.Org X server incorrectly handled
XkbSetGeometry requests resulting in an information leak. An attacker able
to connect to an X server, either locally or remotely, could use this issue
to possibly obtain sensitive information. (CVE-2015-0255)

It was discovered that the X.Org X server incorrectly handled certain
trapezoids. An attacker able to connect to an X server, either locally or
remotely, could use this issue to possibly crash the server. This issue
only affected Ubuntu 12.04 LTS. (CVE-2013-6424)

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 14.10
Ubuntu 14.04
Ubuntu 12.04

After a standard system update you need to reboot your computer to make
all the necessary changes.

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