GNU Gatekeeper before 3.1 does not limit the number of connections to the status port, which allows remote attackers to cause a denial of service (connection and thread consumption) via a large number of connections.
https://exchange.xforce.ibmcloud.com/vulnerabilities/77975
http://www.securityfocus.com/bid/55198
http://www.openwall.com/lists/oss-security/2012/08/27/1
http://www.openwall.com/lists/oss-security/2012/08/25/4
http://www.openwall.com/lists/oss-security/2012/08/25/3
http://www.gnugk.org/gnugk-3.1.html
http://secunia.com/advisories/50343
http://lists.opensuse.org/opensuse-updates/2016-07/msg00070.html