Secunia Security Advisory – Debian has issued an update for zsync. This fixes some vulnerabilities, which can be exploited by malicious people to cause a DoS (Denial of Service) or potentially compromise a user’s system.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/39800/sa16690.txt
Source: https://packetstormsecurity.com/files/39800/Secunia-Security-Advisory-16690.html