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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-220605 | CISC-ND-001140 | SV-220605r521267_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 Switch NDM Security Technical Implementation Guide | 2020-09-23 |
Details
| Check Text ( C-22320r507861_chk ) |
|---|
| Review the Cisco switch configuration to verify that it encrypts SNMP messages using a FIPS 140-2 approved algorithm 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 switch is not configured to encrypt SNMP messages using a FIPS 140-2 approved algorithm, this is a finding. |
| Fix Text (F-22309r507862_fix) |
|---|
| Configure the Cisco switch to encrypt SNMP messages using a FIPS 140-2 approved algorithm as shown in the example below: SW4(config)#snmp-server group V3GROUP v3 priv read V3READ write V3WRITE SW4(config)#snmp-server user V3USER V3GROUP v3 auth sha xxxxxx priv aes 256 xxxxxx |