[USN-5304-1] PolicyKit vulnerability

Marc Deslauriers marc.deslauriers at canonical.com
Mon Feb 28 14:10:51 UTC 2022

Ubuntu Security Notice USN-5304-1
February 28, 2022

policykit-1 vulnerability

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

- Ubuntu 21.10
- Ubuntu 20.04 LTS


policykit-1 could be made to crash if it received specially crafted data.

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


Kevin Backhouse discovered that PolicyKit incorrectly handled file
descriptors. A local attacker could possibly use this issue to cause
PolicyKit to crash, resulting in a denial of service.

Update instructions:

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

Ubuntu 21.10:
  policykit-1                     0.105-31ubuntu0.2

Ubuntu 20.04 LTS:
  policykit-1                     0.105-26ubuntu1.3

In general, a standard system update will make all the necessary changes.


Package Information:
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