STIGQter: STIG Summary: Cisco IOS XR Router NDM Security Technical Implementation Guide Version: 2 Release: 2 Benchmark Date: 23 Apr 2021:

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

DISA Rule

SV-216540r531088_rule

Vulnerability Number

V-216540

Group Title

SRG-APP-000395-NDM-000347

Rule Version

CISC-ND-001150

Severity

CAT II

CCI(s)

• 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.

Weight

10

Fix Recommendation

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 authenticate
RP/0/0/CPU0:R4#ntp authentication-key 1 md5 xxxxxx
RP/0/0/CPU0:R4#ntp trusted-key
RP/0/0/CPU0:R4#ntp server x.x.x.x key 1
RP/0/0/CPU0:R4#ntp server y.y.y.y key 1

Check Contents

Review the Cisco router configuration to verify that it is compliant with this requirement as shown in the configuration example below.

ntp
authentication-key 1 md5 encrypted 030654090416
trusted-key 1
server x.x.x.x key 1
server y.y.y.y key 1

If the Cisco router is not configured to authenticate NTP sources using authentication that is cryptographically based, this is a finding.

Vulnerability Number

V-216540

Documentable

False

Rule Version

CISC-ND-001150

Severity Override Guidance

Review the Cisco router configuration to verify that it is compliant with this requirement as shown in the configuration example below.

ntp
authentication-key 1 md5 encrypted 030654090416
trusted-key 1
server x.x.x.x key 1
server y.y.y.y key 1

If the Cisco router is not configured to authenticate NTP sources using authentication that is cryptographically based, this is a finding.

Check Content Reference

M

Target Key

4023

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