USN-3934-1: PolicyKit vulnerability
policykit-1 vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 18.10
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS
Summary
PolicyKit could allow unintended access.
Software Description
- policykit-1 – framework for managing administrative policies and privileges
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 18.10
- libpolkit-backend-1-0 – 0.105-21ubuntu0.4
- policykit-1 – 0.105-21ubuntu0.4
- Ubuntu 18.04 LTS
- libpolkit-backend-1-0 – 0.105-20ubuntu0.18.04.5
- policykit-1 – 0.105-20ubuntu0.18.04.5
- Ubuntu 16.04 LTS
- libpolkit-backend-1-0 – 0.105-14.1ubuntu0.5
- policykit-1 – 0.105-14.1ubuntu0.5
- Ubuntu 14.04 LTS
- libpolkit-backend-1-0 – 0.105-4ubuntu3.14.04.6
- policykit-1 – 0.105-4ubuntu3.14.04.6
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to reboot your computer to make
all the necessary changes.
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