polkit: Heap-corruption on duplicate IDs

Background

polkit is a toolkit for managing policies relating to unprivileged processes communicating with privileged processes.

Description

A vulnerability was discovered in polkit’s polkit_backend_action_pool_init function due to duplicate action IDs in action descriptions.

Impact

Local attackers are able to gain unauthorized privileges on the system.

Workaround

There is no known workaround at this time.

Resolution

All polkit users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=sys-auth/polkit-0.113"