USN-2184-2: Unity vulnerabilities

30 April 2014

The Unity lock screen could be bypassed.

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Releases

Packages

  • unity - Interface designed for efficiency of space and interaction.

Details

USN-2184-1 fixed lock screen vulnerabilities in Unity. Further testing has
uncovered more issues which have been fixed in this update. This update
also fixes a regression with the shutdown dialogue.

We apologize for the inconvenience.

Original advisory details:

Frédéric Bardy discovered that Unity incorrectly filtered keyboard
shortcuts when the screen was locked. A local attacker could possibly use
this issue to run commands, and unlock the current session.

Giovanni Mellini discovered that Unity could display the Dash in certain
conditions when the screen was locked. A local attacker could possibly use
this issue to run commands, and unlock the current session.

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 14.04

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

References

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