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

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-216539	CISC-ND-001140	SV-216539r531088_rule		Medium

Description
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.

STIG	Date
Cisco IOS XR Router NDM Security Technical Implementation Guide	2021-03-26

Details

Check Text ( C-17774r288303_chk )

Review the Cisco router configuration to verify that it is compliant with this requirement as shown in the example below. snmp-server host x.x.x.x traps version 3 auth V3USER snmp-server user V3USER V3GROUP v3 auth sha encrypted 110B1607150B snmp-server view V3READ iso included snmp-server view V3WRITE iso included snmp-server group V3GROUP v3 auth read V3READ write V3WRITE If the Cisco router is not configured to encrypt SNMP messages using a FIPS 140-2 approved algorithm, this is a finding.

Fix Text (F-17771r288304_fix)

Configure the Cisco router to encrypt SNMP messages using a FIPS 140-2 approved algorithm as shown in the example below. RP/0/0/CPU0:R3(config)#snmp-server group V3GROUP v3 auth read V3READ write V3WRITE RP/0/0/CPU0:R3(config)#snmp-server user V3USER V3GROUP v3 auth sha xxxxxx priv aes 256 xxxxxx RP/0/0/CPU0:R3(config)#snmp-server view V3READ iso included RP/0/0/CPU0:R3(config)#snmp-server view V3WRITE iso included RP/0/0/CPU0:R3(config)#snmp-server host x.x.x.x version 3 auth V3USER