[USN-3861-2] PolicyKit vulnerability

Leonidas S. Barbosa leo.barbosa at canonical.com
Wed Jan 16 19:10:05 UTC 2019

Ubuntu Security Notice USN-3861-2
January 16, 2019

policykit-1 vulnerability

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

- Ubuntu 12.04 ESM


PolicyKit could allow unintended access.

Software Description:
- policykit-1: framework for managing administrative policies and


USN-3861-1 fixed a vulnerability in PolicyKit. This update provides
the corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

 It was discovered that PolicyKit incorrectly handled certain large
 user UIDs. A local attacker with a large UID could possibly use this
 issue to perform privileged actions.

Update instructions:

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

Ubuntu 12.04 ESM:
  libpolkit-backend-1-0           0.104-1ubuntu1.4
  policykit-1                     0.104-1ubuntu1.4

After a standard system update you need to reboot your computer to make
all the necessary changes.

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