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Alerts This Week
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Alerts This Week
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Ubuntu: USN-2184-1 Moderate: Unity Lock Screen Bypass Security Advisory

ubuntu
Calendar Grey April 29, 2014
Scroller Ubuntu
The security flaw in the Unity lock screen can be exploited by unauthorized users to gain access to locked sessions. Ensure you update your Ubuntu 14.04 LTS to mitigate this risk.
The Unity lock screen could be bypassed.

Summary

The Unity lock screen could be bypassed.

Software Description:

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

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.

Topics%20covered

Topics Covered

security advisory Ubuntu moderate severity local attack bypass unity lock screen

Update Instructions

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

Ubuntu 14.04 LTS:
  unity                           7.2.0+14.04.20140423-0ubuntu1.1

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

References

https://ubuntu.com/security/notices/USN-2184-1

https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1308850, https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1313885

Severity
important
Lowest
Low
Medium
High
Critical

April 29, 2014

Topics%20covered

Topics Covered

security advisory Ubuntu moderate severity local attack bypass unity lock screen

Package Information

https://launchpad.net/ubuntu/+source/unity/7.2.0+14.04.20140423-0ubuntu1.1

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