Secunia Security Advisory – Fedora has issued an update for znc. This fixes multiple vulnerabilities, which can be exploited by malicious users and malicious people to cause a DoS (Denial of Service).
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/92737/sa40970.txt
Source: https://packetstormsecurity.com/files/92737/Secunia-Security-Advisory-40970.html

