Ubuntu Security Notice USN-2789-1
3rd November, 2015
xscreensaver vulnerability
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 version:
- Ubuntu 12.04 LTS:
-
xscreensaver
5.15-2ubuntu1.1
To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to restart your session to make
all the necessary changes.