CVE-2016-7431
NTP before 4.2.8p9 allows remote attackers to bypass the origin timestamp protection mechanism via an origin timestamp of zero. NOTE: this vulnerability exists because of a CVE-2015-8138 regression.
Date published : 2017-01-13
http://www.securityfocus.com/bid/94454
http://www.securityfocus.com/archive/1/539955/100/0/threaded