CVE-2016-4955
ntpd in NTP 4.x before 4.2.8p8, when autokey is enabled, allows remote attackers to cause a denial of service (peer-variable clearing and association outage) by sending (1) a spoofed crypto-NAK packet or (2) a packet with an incorrect MAC value at a certain time.
Date published : 2016-07-04
http://www.securityfocus.com/bid/91007
http://www.securityfocus.com/archive/1/538600/100/0/threaded