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V-215842

CAT II (Medium)

The Cisco router must be configured to encrypt SNMP messages using a FIPS 140-2 approved algorithm.

Rule ID

SV-215842r961506_rule

STIG

Cisco IOS XE Router NDM Security Technical Implementation Guide

Version

V3R7

CCIs

CCI-000068

Discussion

Without the strong encryption that is provided by the SNMP Version 3 User-based Security Model (USM), an unauthorized user can gain access to network management information that can be used to create a network outage.

Check Content

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

snmp-server group V3GROUP v3 priv read V3READ write V3WRITE
snmp-server view V3READ iso included
snmp-server view V3WRITE iso included
snmp-server host x.x.x.x version 3 auth V3USER

Encryption used by the SNMP users can be viewed via the show snmp user command as shown in the example below.

R4#show snmp user

User name: V3USER
Engine ID: 800000090300C2042B540000
storage-type: nonvolatile active
Authentication Protocol: SHA
Privacy Protocol: AES256
Group-name: V3GROUP

If the Cisco router is not configured to encrypt SNMP messages using a FIPS 140-2 approved algorithm, this is a finding.

Fix Text

Configure the Cisco router to encrypt SNMP messages using a FIPS 140-2 approved algorithm as shown in the example below.

R4(config)#snmp-server group V3GROUP v3 priv read V3READ write V3WRITE
R4(config)#snmp-server user V3USER V3GROUP v3 auth sha xxxxxx priv aes 256 xxxxxx