NTP: An exploitable vulnerability exists in the message authentication functionality of libntp…

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

No source has published a CVSS score for this record yet.

• CISA KEV Not listed.
• EPSS 0.036, the 89th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 6 Jan 2017. New records show when each source confirmed them.

Sources

• CVE List: CVE-2016-1550
• NVD: CVE-2016-1550

References from the CNA

• www.ubuntu.com/usn/USN-3096-1 vendor-advisoryubuntu
• www.debian.org/security/2016/dsa-3629 vendor-advisorydebian
• www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html confirm
• access.redhat.com/errata/RHSA-2016:1141 vendor-advisoryredhat
• lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html vendor-advisorysuse
• www.kb.cert.org/vuls/id/718152 third-party-advisorycert-vn
• rhn.redhat.com/errata/RHSA-2016-1552.html vendor-advisoryredhat
• www.securitytracker.com/id/1035705 vdb-entrysectrack
• www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html confirm
• security.netapp.com/advisory/ntap-20171004-0002/ confirm
• www.talosintelligence.com/reports/TALOS-2016-0084/
• tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160428-ntpd vendor-advisorycisco
• security.FreeBSD.org/advisories/FreeBSD-SA-16:16.ntp.asc vendor-advisoryfreebsd
• www.securityfocus.com/bid/88261 vdb-entrybid
• lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html vendor-advisorysuse
• lists.opensuse.org/opensuse-updates/2016-05/msg00114.html vendor-advisorysuse
• security.gentoo.org/glsa/201607-15 vendor-advisorygentoo
• lists.opensuse.org/opensuse-security-announce/2016-05/msg00052.html vendor-advisorysuse
• packetstormsecurity.com/files/136864/Slackware-Security-Advisory-ntp-Updates.html
• lists.opensuse.org/opensuse-security-announce/2016-06/msg00001.html vendor-advisorysuse
• lists.fedoraproject.org/pipermail/package-announce/2016-May/184669.html vendor-advisoryfedora
• lists.opensuse.org/opensuse-security-announce/2016-05/msg00037.html vendor-advisorysuse
• www.debian.org/security/2016/dsa-3629 vendor-advisorydebian
• www.talosintelligence.com/vulnerability_reports/TALOS-2016-0084
• www.securityfocus.com/archive/1/538233/100/0/threaded mailing-listbugtraq
• lists.opensuse.org/opensuse-security-announce/2016-06/msg00020.html vendor-advisorysuse
• www.securityfocus.com/archive/1/archive/1/538233/100/0/threaded mailing-listbugtraq
• lists.opensuse.org/opensuse-security-announce/2016-05/msg00034.html vendor-advisorysuse
• lists.fedoraproject.org/pipermail/package-announce/2016-May/183647.html vendor-advisoryfedora
• cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf confirm

And 4 more on the CVE record.

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.