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.
ntpqis listening for data and the port number it is listening on or if the attacker can provide a malicious instance
ntpdthat victims will connect to then an attacker can send a set of crafted mode 6 response packets that, if received by
ntpq, can cause
ntpqagainst a server and
ntpqcrashes, try again using
rawmode. Build or get a patched
ntpqand see if that fixes the problem. Report new bugs in
ntpqor abusive servers appropriately.
ntpqin scripts, make sure
ntpqdoes what you expect in your scripts.