Stack-based buffer overflow in ntpq and ntpdc of NTP version 4.2.8p11 allows an attacker to achieve code execution or escalate to higher privileges via a long string as the argument for an IPv4 or IPv6 command-line parameter. NOTE: It is unclear whether there are any common situations in which ntpq or ntpdc is used with a command line from an untrusted source.
https://www.exploit-db.com/exploits/44909/
https://usn.ubuntu.com/4229-1/
https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03962en_us
https://security.gentoo.org/glsa/201903-15
https://gist.github.com/fakhrizulkifli/9b58ed8e0354e8deee50b0eebd1c011f
https://access.redhat.com/errata/RHSA-2019:2077
https://access.redhat.com/errata/RHSA-2018:3854