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.
ntpq) packet from a permitted network address can trigger a NULL pointer dereference, crashing
ntpd. Note that for this attack to work, the sending system must be on an address that the target's
ntpdaccepts mode 6 packets from, and must use a private key that is specifically listed as being used for mode 6 authorization.