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Vulnerability record · CVE-2015-8138 · published 30 January 2017

CVE-2015-8138: Ntp improper input validation vulnerability

Ntp · Ntp

NTP before 4.2.8p6 and 4.3.x before 4.3.90 allows remote attackers to bypass the origin timestamp validation via a packet with an origin timestamp set to zero.

5.3 CVSS 3.0 Medium EPSS 6.3% · top 6.7% CWE-20 · Improper input validation
5.3CVSS 3.0 base score, v2 5.0
6.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
64References
17 Jun 2026Last modified by NVD

Description

NTP before 4.2.8p6 and 4.3.x before 4.3.90 allows remote attackers to bypass the origin timestamp validation via a packet with an origin timestamp set to zero.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Affected products

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

References

LinkTags
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177507.html Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2016-January/176434.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00059.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00060.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00020.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00038.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00048.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html Third Party Advisory
http://lists.opensuse.org/opensuse-updates/2016-05/msg00114.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-0063.html Third Party 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-20160127-ntpd Third Party Advisory
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160428-ntpd Third Party Advisory
http://www.debian.org/security/2016/dsa-3629 Third Party Advisory
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
http://www.securityfocus.com/bid/81811 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1034782 Third Party AdvisoryVDB Entry
http://www.ubuntu.com/usn/USN-3096-1 Third Party Advisory
https://bto.bluecoat.com/security-advisory/sa113 Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf
https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf
https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03750en_us
https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03766en_us
https://security.FreeBSD.org/advisories/FreeBSD-SA-16:09.ntp.asc
https://security.gentoo.org/glsa/201607-15 Third Party Advisory
https://security.netapp.com/advisory/ntap-20171004-0002/
https://security.netapp.com/advisory/ntap-20171031-0001/
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161123-ntpd Third Party Advisory
https://us-cert.cisa.gov/ics/advisories/icsa-21-103-11
https://www.arista.com/en/support/advisories-notices/security-advisories/1332-security-advisory-19
https://www.kb.cert.org/vuls/id/718152 Third Party AdvisoryUS Government Resource
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177507.html Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2016-January/176434.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00059.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00060.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00020.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00038.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00048.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2015-8138), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.