USN-3934-2: PolicyKit vulnerability

2 September 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 privileges


USN-3934-1 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 relied on the fork() system call in the Linux kernel being atomic. A local attacker could possibly use this issue to gain access to services that have cached authorizations.

Update instructions

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

Ubuntu 12.04 ESM
libpolkit-backend-1-0 - 0.104-1ubuntu1.5
policykit-1 - 0.104-1ubuntu1.5

To update your system, please follow these instructions:

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