CVE-2015-7974

NTP 4.x before 4.2.8p6 and 4.3.x before 4.3.90 do not verify peer associations of symmetric keys when authenticating packets, which might allow remote attackers to conduct impersonation attacks via an arbitrary trusted key, aka a "skeleton key."

• CWE-287

• http://bugs.ntp.org/show_bug.cgi?id=2936Issue Tracking, Vendor Advisory
• http://rhn.redhat.com/errata/RHSA-2016-2583.htmlThird Party Advisory
• http://support.ntp.org/bin/view/Main/NtpBug2936Vendor Advisory
• http://www.debian.org/security/2016/dsa-3629Third Party Advisory
• http://www.securityfocus.com/bid/81960Third Party Advisory, VDB Entry
• http://www.securitytracker.com/id/1034782Third Party Advisory, VDB Entry
• http://www.talosintel.com/reports/TALOS-2016-0071/Exploit, Third Party Advisory
• https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdfThird Party Advisory
• https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03750en_usThird Party Advisory
• https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03766en_usThird Party Advisory
• https://security.FreeBSD.org/advisories/FreeBSD-SA-16:09.ntp.ascThird Party Advisory
• https://security.gentoo.org/glsa/201607-15Third Party Advisory
• https://security.netapp.com/advisory/ntap-20171031-0001/Third Party Advisory
• https://us-cert.cisa.gov/ics/advisories/icsa-21-103-11Third Party Advisory, US Government Resource
• http://bugs.ntp.org/show_bug.cgi?id=2936Issue Tracking, Vendor Advisory
• http://rhn.redhat.com/errata/RHSA-2016-2583.htmlThird Party Advisory
• http://support.ntp.org/bin/view/Main/NtpBug2936Vendor Advisory
• http://www.debian.org/security/2016/dsa-3629Third Party Advisory
• http://www.securityfocus.com/bid/81960Third Party Advisory, VDB Entry
• http://www.securitytracker.com/id/1034782Third Party Advisory, VDB Entry
• http://www.talosintel.com/reports/TALOS-2016-0071/Exploit, Third Party Advisory
• https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdfThird Party Advisory
• https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03750en_usThird Party Advisory
• https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03766en_usThird Party Advisory
• https://security.FreeBSD.org/advisories/FreeBSD-SA-16:09.ntp.ascThird Party Advisory
• https://security.gentoo.org/glsa/201607-15Third Party Advisory
• https://security.netapp.com/advisory/ntap-20171031-0001/Third Party Advisory
• https://us-cert.cisa.gov/ics/advisories/icsa-21-103-11Third Party Advisory, US Government Resource

Published

Jan 26, 2016

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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