CVE-2016-2518

The MATCH_ASSOC function in NTP before version 4.2.8p9 and 4.3.x before 4.3.92 allows remote attackers to cause an out-of-bounds reference via an addpeer request with a large hmode value.

• CWE-125

• http://lists.fedoraproject.org/pipermail/package-announce/2016-May/183647.html
• http://lists.fedoraproject.org/pipermail/package-announce/2016-May/184669.html
• http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00034.html
• http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00037.html
• http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00052.html
• http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00001.html
• http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00020.html
• http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html
• http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html
• http://lists.opensuse.org/opensuse-updates/2016-05/msg00114.html
• http://packetstormsecurity.com/files/136864/Slackware-Security-Advisory-ntp-Updates.html
• http://rhn.redhat.com/errata/RHSA-2016-1552.htmlBroken Link
• http://support.ntp.org/bin/view/Main/NtpBug3009Vendor Advisory
• http://support.ntp.org/bin/view/Main/SecurityNotice#April_2016_ntp_4_2_8p7_SecurityVendor Advisory
• http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160428-ntpd
• http://www.debian.org/security/2016/dsa-3629Third Party Advisory
• http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.htmlPatch, Third Party Advisory
• http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.htmlThird Party Advisory
• http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.htmlThird Party Advisory
• http://www.securityfocus.com/archive/1/538233/100/0/threaded
• http://www.securityfocus.com/archive/1/archive/1/538233/100/0/threaded
• http://www.securityfocus.com/bid/88226Third Party Advisory, VDB Entry
• http://www.securitytracker.com/id/1035705Third Party Advisory, VDB Entry
• http://www.ubuntu.com/usn/USN-3096-1
• https://access.redhat.com/errata/RHSA-2016:1141Third Party Advisory
• https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdfThird Party Advisory
• https://security.FreeBSD.org/advisories/FreeBSD-SA-16:16.ntp.ascThird Party Advisory
• https://security.gentoo.org/glsa/201607-15Third Party Advisory
• https://security.netapp.com/advisory/ntap-20171004-0002/Third Party Advisory
• https://support.f5.com/csp/article/K20804323
• https://us-cert.cisa.gov/ics/advisories/icsa-21-159-11
• https://www.debian.org/security/2016/dsa-3629
• https://www.kb.cert.org/vuls/id/718152Third Party Advisory, US Government Resource
• http://lists.fedoraproject.org/pipermail/package-announce/2016-May/183647.html
• http://lists.fedoraproject.org/pipermail/package-announce/2016-May/184669.html
• http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00034.html
• http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00037.html
• http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00052.html
• http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00001.html
• http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00020.html
• http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html
• http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html
• http://lists.opensuse.org/opensuse-updates/2016-05/msg00114.html
• http://packetstormsecurity.com/files/136864/Slackware-Security-Advisory-ntp-Updates.html
• http://rhn.redhat.com/errata/RHSA-2016-1552.htmlBroken Link
• http://support.ntp.org/bin/view/Main/NtpBug3009Vendor Advisory
• http://support.ntp.org/bin/view/Main/SecurityNotice#April_2016_ntp_4_2_8p7_SecurityVendor Advisory
• http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160428-ntpd
• http://www.debian.org/security/2016/dsa-3629Third Party Advisory
• http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.htmlPatch, Third Party Advisory
• http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.htmlThird Party Advisory
• http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.htmlThird Party Advisory
• http://www.securityfocus.com/archive/1/538233/100/0/threaded
• http://www.securityfocus.com/archive/1/archive/1/538233/100/0/threaded
• http://www.securityfocus.com/bid/88226Third Party Advisory, VDB Entry
• http://www.securitytracker.com/id/1035705Third Party Advisory, VDB Entry
• http://www.ubuntu.com/usn/USN-3096-1
• https://access.redhat.com/errata/RHSA-2016:1141Third Party Advisory
• https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdfThird Party Advisory
• https://security.FreeBSD.org/advisories/FreeBSD-SA-16:16.ntp.ascThird Party Advisory
• https://security.gentoo.org/glsa/201607-15Third Party Advisory
• https://security.netapp.com/advisory/ntap-20171004-0002/Third Party Advisory
• https://support.f5.com/csp/article/K20804323
• https://us-cert.cisa.gov/ics/advisories/icsa-21-159-11
• https://www.debian.org/security/2016/dsa-3629
• https://www.kb.cert.org/vuls/id/718152Third Party Advisory, US Government Resource

Published

Jan 30, 2017

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.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2016-2511Cross-site scripting (XSS) vulnerability in WebSVN 2.3.3 and…
• CVE-2016-2512The utils.http.is_safe_url function in Django before 1.8.10 …
• CVE-2016-2513The password hasher in contrib/auth/hashers.py in Django bef…
• CVE-2016-2515Hawk before 3.1.3 and 4.x before 4.1.1 allow remote attacker…
• CVE-2016-2516NTP before 4.2.8p7 and 4.3.x before 4.3.92, when mode7 is en…
• CVE-2016-2517NTP before 4.2.8p7 and 4.3.x before 4.3.92 allows remote att…
• CVE-2016-2519ntpd in NTP before 4.2.8p7 and 4.3.x before 4.3.92 allows re…
• CVE-2016-2521Untrusted search path vulnerability in the WiresharkApplicat…
• CVE-2016-2522The dissect_ber_constrained_bitstring function in epan/disse…
• CVE-2016-2523The dnp3_al_process_object function in epan/dissectors/packe…
• CVE-2016-2524epan/dissectors/packet-x509af.c in the X.509AF dissector in …
• CVE-2016-2525epan/dissectors/packet-http2.c in the HTTP/2 dissector in Wi…