libxpc in launchd in Apple OS X before 10.11 does not restrict the creation of processes for network connections, which allows remote attackers to cause a denial of service (resource consumption) by repeatedly connecting to the SSH port, a different vulnerability than CVE-2015-7761.
https://support.apple.com/HT205267
http://www.securitytracker.com/id/1033703
http://www.securityfocus.com/bid/76908
http://lists.apple.com/archives/security-announce/2015/Sep/msg00008.html