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Vulnerability record · CVE-2016-2518 · published 30 January 2017

CVE-2016-2518: Ntp out-of-bounds read vulnerability

Ntp · Ntp

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.

5.3 CVSS 3.1 Medium EPSS 15% · top 3.4% CWE-125 · Out-of-bounds read
5.3CVSS 3.1 base score, v2 5.0
15%EPSS exploitation probability, 30 days
NoNot in CISA KEV
17Affected product versions listed by NVD
66References
17 Jun 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected products

17 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
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.html Broken Link
http://support.ntp.org/bin/view/Main/NtpBug3009 Vendor Advisory
http://support.ntp.org/bin/view/Main/SecurityNotice#April_2016_ntp_4_2_8p7_Security Vendor Advisory
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160428-ntpd
http://www.debian.org/security/2016/dsa-3629 Third Party Advisory
http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html PatchThird Party Advisory
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html Third Party Advisory
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html Third 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/88226 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1035705 Third Party AdvisoryVDB Entry
http://www.ubuntu.com/usn/USN-3096-1
https://access.redhat.com/errata/RHSA-2016:1141 Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf Third Party Advisory
https://security.FreeBSD.org/advisories/FreeBSD-SA-16:16.ntp.asc Third Party Advisory
https://security.gentoo.org/glsa/201607-15 Third 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/718152 Third Party AdvisoryUS 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

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Source: NIST National Vulnerability Database (record CVE-2016-2518), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.