Detections
Analytics

1.19 CISC-ND-001150

Information

The Cisco router must be configured to authenticate NTP sources using authentication that is cryptographically based.

GROUP ID: V-216540RULE ID: SV-216540r961506

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.

Solution

Configure the Cisco router to authenticate NTP sources using authentication that is cryptographically based as shown in the example below.

RP/0/0/CPU0:R4#ntp authenticateRP/0/0/CPU0:R4#ntp authentication-key 1 md5 xxxxxxRP/0/0/CPU0:R4#ntp trusted-keyRP/0/0/CPU0:R4#ntp server x.x.x.x key 1RP/0/0/CPU0:R4#ntp server y.y.y.y key 1

See Also

https://workbench.cisecurity.org/benchmarks/23560

Item Details

Category: IDENTIFICATION AND AUTHENTICATION

References: 800-53|IA-3(1), CAT|II, CCI|CCI-001967, Rule-ID|SV-216540r961506_rule, STIG-ID|CISC-ND-001150, Vuln-ID|V-216540

Plugin: Cisco

Control ID: e943eaed8d95c032dcc7d0b861d6ec8a339918fd24756871fcfea0a16ca292a6