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

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-243203	WLAN-ND-001600	SV-243203r879768_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 WLAN Controller Management Security Technical Implementation Guide	2023-09-18

Details

Check Text (C-46478r720062_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-46435r720063_fix)

Configure the device to authenticate all received NTP messages using a FIPS-approved message authentication code algorithm.