Multiple buffer overflows in the ctl_put* functions in NTP before 4.2.8p10 and 4.3.x before 4.3.94 allow remote authenticated users to have unspecified impact via a long variable.
http://packetstormsecurity.com/files/142284/Slackware-Security-Advisory-ntp-Updates.html
https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf
http://seclists.org/fulldisclosure/2017/Nov/7
http://seclists.org/fulldisclosure/2017/Sep/62
https://support.apple.com/HT208144
https://support.apple.com/kb/HT208144
https://support.f5.com/csp/article/K99254031
https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03962en_us
https://us-cert.cisa.gov/ics/advisories/icsa-21-159-11