NTP users are strongly urged to take immediate action to ensure that their NTP daemons are not susceptible to use in a distributed denial-of-service (DDoS) attack. Please also take this opportunity to defeat denial-of-service attacks by implementing ingress and Egress filtering through BCP38.TWikiTutorial to get a jumpstart on the NTP tool. A good rule of thumb is to add at the end of the page and sign and date it with your WikiName.
ntp-4.2.8p4was released on 21 October 2015, and addresses 13 low- and medium-severity security issues and provides about 100 bugfixes and enhancements over 4.2.8p3.
Please see the NTP Security Notice for vulnerability and mitigation details.Are you using Autokey in production? If so, please contact Harlan - he's got some questions for you.