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


Overview

Finding ID Version Rule ID IA Controls Severity
V-101547 CISC-ND-001140 SV-110651r1_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 NX-OS Switch NDM Security Technical Implementation Guide 2020-05-20

Details

Check Text ( C-100433r1_chk )
Review the Cisco switch configuration to verify that it is compliant with this requirement as shown in the example below:

snmp-server user NETOPS auth sha 5Er23@#as178 priv aes-128 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

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

SW1# show snmp user
______________________________________________________________
SNMP USERS
______________________________________________________________

User Auth Priv(enforce) Groups acl_filter
____ ____ ___________ ______ __________
NETOPS sha aes-128 network-operator

If the Cisco switch is not configured to encrypt SNMP messages using a FIPS 140-2 approved algorithm, this is a finding.
Fix Text (F-107231r1_fix)
Configure the Cisco switch to encrypt SNMP messages using a FIPS 140-2 approved algorithm as shown in the example below:

SW1(config)# snmp-server user NETOPS auth sha xxxxxxxxxxxxx priv aes-128 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx