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Ubuntu Security Notice USN-2303-1
July 31, 2014

unity vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 14.04 LTS

Summary:

The Unity lock screen could possibly be bypassed in certain circumstances.

Software Description:
- unity: Interface designed for efficiency of space and interaction.

Details:

It was discovered that in certain circumstances Unity failed to
successfully grab the keyboard when switching to the lock screen. A local
attacker could possibly use this issue to run commands, and unlock the
current session.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 14.04 LTS:
  unity                           7.2.2+14.04.20140714-0ubuntu1.1

After a standard system update you need to restart your session to make all
the necessary changes.

References:
  http://www.ubuntu.com/usn/usn-2303-1
  https://launchpad.net/bugs/1349128

Package Information:
  https://launchpad.net/ubuntu/+source/unity/7.2.2+14.04.20140714-0ubuntu1.1