Ubuntu Security Notice 1803-1 - It was discovered that the X.Org X server did not properly clear input events in certain circumstances. A local attacker with physical access could use this flaw to capture keystrokes.
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Ubuntu Security Notice USN-1803-1
April 17, 2013
xorg-server, xorg-server-lts-quantal vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 12.10
- Ubuntu 12.04 LTS
- Ubuntu 11.10
- Ubuntu 10.04 LTS
Summary:
The X server could be made to reveal keystrokes of other users.
Software Description:
- xorg-server: X.Org X server
- xorg-server-lts-quantal: X.Org X server
Details:
It was discovered that the X.Org X server did not properly clear input
events in certain circumstances. A local attacker with physical access
could use this flaw to capture keystrokes.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 12.10:
xserver-xorg-core 2:1.13.0-0ubuntu6.2
Ubuntu 12.04 LTS:
xserver-xorg-core 2:1.11.4-0ubuntu10.13
xserver-xorg-core-lts-quantal 2:1.13.0-0ubuntu6.1~precise3
Ubuntu 11.10:
xserver-xorg-core 2:1.10.4-1ubuntu4.5
Ubuntu 10.04 LTS:
xserver-xorg-core 2:1.7.6-2ubuntu7.12
After a standard system update you need to restart your session to make
all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-1803-1
CVE-2013-1940
Package Information:
https://launchpad.net/ubuntu/+source/xorg-server/2:1.13.0-0ubuntu6.2
https://launchpad.net/ubuntu/+source/xorg-server/2:1.11.4-0ubuntu10.13
https://launchpad.net/ubuntu/+source/xorg-server-lts-quantal/2:1.13.0-0ubuntu6.1~precise3
https://launchpad.net/ubuntu/+source/xorg-server/2:1.10.4-1ubuntu4.5
https://launchpad.net/ubuntu/+source/xorg-server/2:1.7.6-2ubuntu7.12