Secunia Security Advisory – Fedora has issued an update for xmlsec1. This fixes a security issue, which can be exploited by malicious people to conduct spoofing attacks.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/80386/sa36284.txt
Source: https://packetstormsecurity.com/files/80386/Secunia-Security-Advisory-36284.html