The network device must authenticate Network Time Protocol sources using authentication that is cryptographically based.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-202112	SRG-APP-000395-NDM-000347	SV-202112r400051_rule		Medium

Description
If Network Time Protocol is not authenticated, an attacker can introduce a rogue NTP server. This rogue server can then be used to send incorrect time information to network devices, which will make log timestamps inaccurate and affect scheduled actions. NTP authentication is used to prevent this tampering by authenticating the time source.

STIG	Date
Network Device Management Security Requirements Guide	2021-03-16

Details

Check Text ( C-2238r381956_chk )
Review the network device configuration to determine if the network device authenticates NTP endpoints before establishing a local, remote, or network connection using authentication that is cryptographically based. If the network device does not authenticate Network Time Protocol sources using authentication that is cryptographically based, this is a finding.

Fix Text (F-2239r381957_fix)
Configure the network device to authenticate Network Time Protocol sources using authentication that is cryptographically based.