Ubuntu Security Notice USN-2475-1
15th January, 2015
gtk+3.0 update
A security issue affects these releases of Ubuntu and its
derivatives:
- Ubuntu 14.04 LTS
Summary
GTK+ improperly handled the menu key, possibly allowing lock screen bypass.
Software description
- gtk+3.0
– GTK+ graphical user interface library
Details
Clemens Fries discovered that GTK+ allowed bypassing certain screen locks
by using the menu key. An attacker with physical access could possibly 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 14.04 LTS:
-
libgtk-3-0
3.10.8-0ubuntu1.4
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.