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V-243149

CAT II (Medium)

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

Rule ID

SV-243149r879768_rule

STIG

Network WLAN AP-IG Management Security Technical Implementation Guide

Version

V7R2

CCIs

CCI-001967

Discussion

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.

Check Content

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

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