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

The Cisco router must be configured to authenticate Network Time Protocol (NTP) sources using authentication that is cryptographically based.

DISA Rule

SV-215843r531083_rule

Vulnerability Number

V-215843

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.

R2(config)#ntp authenticate
R2(config)#ntp authentication-key 1 md5 xxxxxx
R2(config)#ntp trusted-key 1
R2(config)#ntp server x.x.x.x key 1
R2(config)#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 121B0A151012 7
ntp authenticate
ntp trusted-key 1
ntp server x.x.x.x key 1
ntp 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-215843

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 121B0A151012 7
ntp authenticate
ntp trusted-key 1
ntp server x.x.x.x key 1
ntp 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

4020

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