CVE-2015-7979

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 11.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-01-30 · updated 2026-06-17
Weakness: CWE-19

Description

NTP before 4.2.8p6 and 4.3.x before 4.3.90 allows remote attackers to cause a denial of service (client-server association tear down) by sending broadcast packets with invalid authentication to a broadcast client.

Affected products

NTP: through 4.2.8; 4.3.0, 4.3.1, 4.3.2, 4.3.3, 4.3.4, 4.3.5 (+83)

References

http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177507.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-January/176434.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00059.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00060.html
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00020.html
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00038.html
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00048.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://rhn.redhat.com/errata/RHSA-2016-1552.html
http://rhn.redhat.com/errata/RHSA-2016-2583.html

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