USN-5252-1: PolicyKit vulnerability

Releases

• Ubuntu 21.10
• Ubuntu 20.04 LTS
• Ubuntu 18.04 ESM

Packages

• 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

• policykit-1 - 0.105-26ubuntu1.2

Ubuntu 18.04

• policykit-1 - 0.105-20ubuntu0.18.04.6

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

References

• CVE-2021-4034

Related notices

• USN-5252-2: libpolkit-gobject-1-dev, libpolkit-agent-1-0, libpolkit-backend-1-dev, policykit-1-doc, policykit-1, libpolkit-gobject-1-0, gir1.2-polkit-1.0, libpolkit-backend-1-0, libpolkit-agent-1-dev