• https://www.kb.cert.org/vuls/id/718152
• https://security.gentoo.org/glsa/201607-15
• 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.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://rhn.redhat.com/errata/RHSA-2016-2583.html
• http://rhn.redhat.com/errata/RHSA-2016-0780.html
• http://lists.opensuse.org/opensuse-updates/2016-05/msg00114.html
• http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html
• http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html
• http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00048.html
• http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00038.html
• http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00020.html
• http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00060.html
• http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00059.html
• http://lists.fedoraproject.org/pipermail/package-announce/2016-January/176434.html
• http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177507.html
• https://security.netapp.com/advisory/ntap-20171031-0001/
• https://security.FreeBSD.org/advisories/FreeBSD-SA-16:09.ntp.asc
• http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
• https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf
• https://us-cert.cisa.gov/ics/advisories/icsa-21-103-11