Check: SRG-APP-000395-NDM-000347
Network Device Management SRG:
SRG-APP-000395-NDM-000347
(in versions v4 r3 through v2 r7)
Title
The network device must authenticate Network Time Protocol sources using authentication that is cryptographically based. (Cat II impact)
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 network device to authenticate Network Time Protocol sources using authentication that is cryptographically based.
Additional Identifiers
Rule ID: SV-202112r879768_rule
Vulnerability ID: V-202112
Group Title: SRG-APP-000395
Expert Comments
CCIs
Number | Definition |
---|---|
CCI-001967 |
The information system authenticates organization-defined devices and/or types of devices before establishing a local, remote, and/or network connection using bidirectional authentication that is cryptographically based. |
Controls
Number | Title |
---|---|
IA-3 (1) |
Cryptographic Bidirectional Authentication |