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Ubuntu 21.10, 20.04 LTS, 18.04 LTS USN-5252-1 Critical PolicyKit Threat

ubuntu
Calendar Grey January 25, 2022
Dist Ubuntu Esm H88
Ensure your system is patched to rectify the PolicyKit flaw in Ubuntu, which allows local exploitation for privilege elevation.
policykit-1 could be made to run programs as an administrator.

Summary

policykit-1 could be made to run programs as an administrator.

Software Description:

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

Details:

It was discovered that the PolicyKit pkexec tool incorrectly handled

command-line arguments. A local attacker could use this issue to escalate

privileges to an administrator.

Topics%20covered

Topics Covered

security advisory critical privilege escalation ubuntu policykit

Update Instructions

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

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

Ubuntu 20.04 LTS:
  policykit-1                     0.105-26ubuntu1.2

Ubuntu 18.04 LTS:
  policykit-1                     0.105-20ubuntu0.18.04.6

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

References

https://ubuntu.com/security/notices/USN-5252-1

CVE-2021-4034

Severity
critical
Lowest
Low
Medium
High
Critical

January 25, 2022

Topics%20covered

Topics Covered

security advisory critical privilege escalation ubuntu policykit

Package Information

https://launchpad.net/ubuntu/+source/policykit-1/0.105-31ubuntu0.1
https://launchpad.net/ubuntu/+source/policykit-1/0.105-26ubuntu1.2
https://launchpad.net/ubuntu/+source/policykit-1/0.105-20ubuntu0.18.04.6

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