CVE-2015-7979: Ntp

High severity, CVSS 7.5. EPSS: 11.9% chance of exploitation in the next 30 days.

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 Ntp: up to and including 4.2.8; version 4.3.0 only; version 4.3.1 only; version 4.3.2 only; version 4.3.3 only; version 4.3.4 only; …

Published 2017-01-30. Last modified 2026-06-17.