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-4.2.8p10was released on 21 March 2017. It addresses 6 medum- and 5 low-severity security issues, 4 informational security topics, 15 bugfixes, and contains other improvements over 4.2.8p9.
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.