Ubuntu Security Notice 2789-1 - It was discovered that XScreenSaver incorrectly handled unplugging an external monitor. An attacker with physical access could use this flaw to gain access to a locked session.
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Ubuntu Security Notice USN-2789-1
November 03, 2015
xscreensaver vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 12.04 LTS
Summary:
The system could be made to expose sensitive information.
Software Description:
- xscreensaver: Automatic screensaver for X
Details:
It was discovered that XScreenSaver incorrectly handled unplugging an
external monitor. An attacker with physical access could use this flaw to
gain access to a locked session.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 12.04 LTS:
xscreensaver 5.15-2ubuntu1.1
After a standard system update you need to restart your session to make
all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-2789-1
CVE-2015-8025
Package Information:
https://launchpad.net/ubuntu/+source/xscreensaver/5.15-2ubuntu1.1