Endpoint Vulnerability

CRYPTO-NAK DoS

Description

For ntp-4 versions up to but not including ntp-4.2.8p7, an off-path attacker can cause a preemptable client association to be demobilized by sending a crypto NAK packet to a victim client with a spoofed source address of an existing associated peer. This is true even if authentication is enabled.

Affected Products

NTP

References

CVE-2016-1547,