ntpd in NTP before 4.2.8p6 and 4.3.x before 4.3.90 allows remote attackers to cause a denial of service (NULL pointer dereference) via a ntpdc reslist command.
https://www.kb.cert.org/vuls/id/718152
https://us-cert.cisa.gov/ics/advisories/icsa-21-103-11
https://security.netapp.com/advisory/ntap-20171031-0001/
https://security.gentoo.org/glsa/201607-15
https://security.FreeBSD.org/advisories/FreeBSD-SA-16:09.ntp.asc
https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf
https://bto.bluecoat.com/security-advisory/sa113
http://www.ubuntu.com/usn/USN-3096-1
http://www.securitytracker.com/id/1034782
http://www.securityfocus.com/bid/81815
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
http://www.debian.org/security/2016/dsa-3629
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160127-ntpd
http://support.ntp.org/bin/view/Main/SecurityNotice#April_2016_NTP_4_2_8p7_Security
http://support.ntp.org/bin/view/Main/NtpBug2939
http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-January/176434.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177507.html