The NTP server is not configured with a symmetric key that is unique from any key configured on any other NTP server.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-17852	NET0819	SV-19127r1_rule		Low

Description
NTP provides an efficient and scalable method for managed network elements to actively synchronize to an accurate time source. Insuring that there are always NTP servers available to provide time is critical. It is imperative that all single points of failure for the NTP infrastructure are eliminated. Knowing the correct time is not only crucial for proper network functioning but also for security. Compromising an NTP server opens the door to more sophisticated attacks that include NTP poisoning, replay attacks, and denial of service.

Description

NTP provides an efficient and scalable method for managed network elements to actively synchronize to an accurate time source. Insuring that there are always NTP servers available to provide time is critical. It is imperative that all single points of failure for the NTP infrastructure are eliminated. Knowing the correct time is not only crucial for proper network functioning but also for security. Compromising an NTP server opens the door to more sophisticated attacks that include NTP poisoning, replay attacks, and denial of service.

STIG	Date
Network Devices Security Technical Implementation Guide	2018-11-27

Details

Check Text ( C-19353r1_chk )
Interview the IAO and administrator to determine if unique keys have been configured.

Fix Text (F-17789r1_fix)
If a hashing algorithm is being used, all servers must be configured with a symmetric key that is unique from any key configured on any other NTP server.