NTP users are strongly urged to take immediate action to ensure that their NTP daemons are not susceptible to being used in distributed denial-of-service (DDoS) attacks. Please also take this opportunity to defeat denial-of-service attacks by implementing Ingress and Egress filtering through BCP38.
ntp-4.2.8p15was released on 23 June 2020. It addresses 1 medium-severity security issue in ntpd, and provides 13 non-security bugfixes over 4.2.8p13.
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.
ntpddoes not enable
trapservice by default. If
trapservice has been explicitly enabled, an attacker can send a specially crafted packet to cause a null pointer dereference that will crash
ntpd, resulting in a denial of service.
ntp.conffile. Only allow mode 6 queries from trusted networks and hosts.
ntpdinstances, and auto-restart
-g) if it stops running.