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.
ctl_getitem()is used by
ntpdto process incoming mode 6 packets. A malicious mode 6 packet can be sent to an
ntpdinstance, and if the
ntpdinstance is from 4.2.8p6 thru 4.2.8p10, that will cause
ctl_getitem()to read past the end of its buffer.