CVE-2018-12327: Ntp

Critical severity, CVSS 9.8. EPSS: 28% chance of exploitation in the next 30 days.

Stack-based buffer overflow in ntpq and ntpdc of NTP version 4.2.8p11 allows an attacker to achieve code execution or escalate to higher privileges via a long string as the argument for an IPv4 or IPv6 command-line parameter. NOTE: It is unclear whether there are any common situations in which ntpq or ntpdc is used with a command line from an untrusted source.

Affected products

• Ntp Ntp: version 4.2.8 only

Published 2018-06-20. Last modified 2026-06-17.