Firewalld: Improper authentication methods

Background

Firewalld provides a dynamically managed firewall with support for network/firewall zones to define the trust level of network connections or interfaces.

Description

A flaw in Firewalld allows any locally logged in user to tamper with or change firewall settings. This is due to how Firewalld handles authentication via polkit which is not properly applied to 5 particular functions to include: addPassthrough, removePassthrough, addEntry, removeEntry, and setEntries.

Impact

A local attacker could tamper or change firewall settings leading to the additional exposure of systems to include unauthorized remote access.

Workaround

There is no known workaround at this time.

Resolution

All Firewalld users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=net-firewall/firewalld-0.4.3.3"