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Ubuntu Security Notice USN-5252-1

Ubuntu Security Notice USN-5252-1
Posted Jan 26, 2022
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5252-1 - 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.

tags | advisory, local
systems | linux, ubuntu
advisories | CVE-2021-4034
SHA-256 | b130c1c4ae73d3ee637fcfad0d7821db62540cca3e8dce5f04de67cd84030b3e

Ubuntu Security Notice USN-5252-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-5252-1
January 25, 2022

policykit-1 vulnerability
==========================================================================

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

- Ubuntu 21.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

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.

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

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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