CVE-2016-9042: Freebsd

Medium severity, CVSS 5.9. EPSS: 3.9% chance of exploitation in the next 30 days.

An exploitable denial of service vulnerability exists in the origin timestamp check functionality of ntpd 4.2.8p9. A specially crafted unauthenticated network packet can be used to reset the expected origin timestamp for target peers. Legitimate replies from targeted peers will fail the origin timestamp check (TEST2) causing the reply to be dropped and creating a denial of service condition.

Affected products

• Freebsd Freebsd: version 10.0 only; version 11.0 only
• HPE Hpux-Ntp: before c.4.2.8.4.0 (fixed in c.4.2.8.4.0)
• Ntp Ntp: version 4.2.8 only
• Siemens SIMATIC Net CP 443-1 Opc Ua Firmware: any version

Published 2018-06-04. Last modified 2026-06-17.