ntpd in NTP before 4.2.8p9, when the trap service is enabled, allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via a crafted packet.
nwtime.org/ntp428p9_release/
rhn.redhat.com/errata/RHSA-2017-0252.html
support.ntp.org/bin/view/Main/NtpBug3119
support.ntp.org/bin/view/Main/SecurityNotice#Recent_Vulnerabilities
www.securityfocus.com/bid/94444
www.securitytracker.com/id/1037354
bto.bluecoat.com/security-advisory/sa139
h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03706en_us
security.FreeBSD.org/advisories/FreeBSD-SA-16:39.ntp.asc
support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03799en_us
support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03885en_us
usn.ubuntu.com/3707-2/
www.kb.cert.org/vuls/id/633847