USN-3861-1: PolicyKit vulnerability

Releases

• Ubuntu 18.10
• Ubuntu 18.04 ESM
• Ubuntu 16.04 ESM
• Ubuntu 14.04 ESM

Packages

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

Details

It was discovered that PolicyKit incorrectly handled certain large user
UIDs. A local attacker with a large UID could possibly use this issue to
perform privileged actions.

Update instructions

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

Ubuntu 18.10

• libpolkit-backend-1-0 - 0.105-21ubuntu0.3
• policykit-1 - 0.105-21ubuntu0.3

Ubuntu 18.04

• libpolkit-backend-1-0 - 0.105-20ubuntu0.18.04.4
• policykit-1 - 0.105-20ubuntu0.18.04.4

Ubuntu 16.04

• libpolkit-backend-1-0 - 0.105-14.1ubuntu0.4
• policykit-1 - 0.105-14.1ubuntu0.4

Ubuntu 14.04

• libpolkit-backend-1-0 - 0.105-4ubuntu3.14.04.5
• policykit-1 - 0.105-4ubuntu3.14.04.5

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

References

• CVE-2018-19788

Related notices

• USN-3861-2: policykit-1, libpolkit-backend-1-0