A PolicyKit security update has been released for Ubuntu 20.04 LTS and 21.10.
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Ubuntu Security Notice USN-5304-1
February 28, 2022
policykit-1 vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 21.10
- Ubuntu 20.04 LTS
Summary:
policykit-1 could be made to crash if it received specially crafted data.
Software Description:
- policykit-1: framework for managing administrative policies and privileges
Details:
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.
References:
https://ubuntu.com/security/notices/USN-5304-1
CVE-2021-4115
Package Information:
https://launchpad.net/ubuntu/+source/policykit-1/0.105-31ubuntu0.2
https://launchpad.net/ubuntu/+source/policykit-1/0.105-26ubuntu1.3
