Secunia Security Advisory – Fedora has issued an update for mod_auth_shadow. This fixes a vulnerability, which can potentially be exploited by malicious people to bypass certain security restrictions.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/90128/sa40017.txt
Source: https://packetstormsecurity.com/files/90128/Secunia-Security-Advisory-40017.html