The getresponse function in ntpq in NTP versions before 4.2.8p9 and 4.3.x before 4.3.90 allows remote attackers to cause a denial of service (infinite loop) via crafted packets with incorrect values.
rhn.redhat.com/errata/RHSA-2016-2583.html
support.ntp.org/bin/view/Main/NtpBug2948
www.debian.org/security/2016/dsa-3629
www.securityfocus.com/bid/81814
www.securitytracker.com/id/1034782
h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03750en_us
h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03766en_us
security.FreeBSD.org/advisories/FreeBSD-SA-16:09.ntp.asc
security.gentoo.org/glsa/201607-15
security.netapp.com/advisory/ntap-20171031-0001/
www.kb.cert.org/vuls/id/718152