Secunia Security Advisory – Gentoo has acknowledged some security issues in fence, which can be exploited by malicious, local users to perform certain actions with escalated privileges.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/94402/sa41642.txt
Source: https://packetstormsecurity.com/files/94402/Secunia-Security-Advisory-41642.html