STIGQter: STIG Summary: Cisco IOS Switch RTR Security Technical Implementation Guide Version: 2 Release: 1 Benchmark Date: 23 Apr 2021:

The Cisco switch must be configured to authenticate all routing protocol messages using NIST-validated FIPS 198-1 message authentication code algorithm.

DISA Rule

SV-220423r622190_rule

Vulnerability Number

V-220423

Group Title

SRG-NET-000168-RTR-000078

Rule Version

CISC-RT-000050

Severity

CAT II

CCI(s)

• CCI-000803 - The information system implements mechanisms for authentication to a cryptographic module that meet the requirements of applicable federal laws, Executive Orders, directives, policies, regulations, standards, and guidance for such authentication.

Weight

10

Fix Recommendation

Configure routing protocol authentication to use a NIST-validated FIPS 198-1 message authentication code algorithm as shown in the example below:

SW1(config)#key chain OSPF_KEY_CHAIN
SW1(config-keychain)#key 1
SW1(config-keychain-key)#key-string xxxxxx
SW1(config-keychain-key)#send-lifetime 00:00:00 Jan 1 2018 23:59:59 Mar 31 2018
SW1(config-keychain-key)#accept-lifetime 00:00:00 Jan 1 2018 01:05:00 Apr 1 2018
SW1(config-keychain-key)#cryptographic-algorithm hmac-sha-256
SW1(config-keychain-key)#exit
SW1(config-keychain)#key 2
SW1(config-keychain-key)#key-string yyyyyyy
SW1(config-keychain-key)#send-lifetime 00:00:00 Apr 1 2018 23:59:59 Jun 30 2018
SW1(config-keychain-key)#accept-lifetime 23:55:00 Mar 31 2018 01:05:00 Jul 1 2018
SW1(config-keychain-key)#cryptographic-algorithm hmac-sha-256
SW1(config-keychain-key)#end
SW1(config)#interface GigabitEthernet0/2
SW1(config-if)#ip ospf authentication key-chain OSPF_KEY_CHAIN

Check Contents

Review the switch configuration to verify it is using a NIST-validated FIPS 198-1 message authentication code algorithm to authenticate routing protocol messages.

OSPF example:

key chain OSPF_KEY_CHAIN
key 1
key-string xxxxxxx
send-lifetime 00:00:00 Jan 1 2018 23:59:59 Mar 31 2018
accept-lifetime 00:00:00 Jan 1 2018 01:05:00 Apr 1 2018
cryptographic-algorithm hmac-sha-256
key 2
key-string yyyyyyy
send-lifetime 00:00:00 Apr 1 2018 23:59:59 Jun 30 2018
accept-lifetime 23:55:00 Mar 31 2018 01:05:00 Jul 1 2018
cryptographic-algorithm hmac-sha-256
…
…
…
interface GigabitEthernet0/1
no switchport
ip address x.x.x.x 255.255.255.0
ip ospf authentication key-chain OSPF_KEY_CHAIN

If a NIST-validated FIPS 198-1 message authentication code algorithm is not being used to authenticate routing protocol messages, this is a finding.

Vulnerability Number

V-220423

Documentable

False

Rule Version

CISC-RT-000050

Severity Override Guidance

Review the switch configuration to verify it is using a NIST-validated FIPS 198-1 message authentication code algorithm to authenticate routing protocol messages.

OSPF example:

key chain OSPF_KEY_CHAIN
key 1
key-string xxxxxxx
send-lifetime 00:00:00 Jan 1 2018 23:59:59 Mar 31 2018
accept-lifetime 00:00:00 Jan 1 2018 01:05:00 Apr 1 2018
cryptographic-algorithm hmac-sha-256
key 2
key-string yyyyyyy
send-lifetime 00:00:00 Apr 1 2018 23:59:59 Jun 30 2018
accept-lifetime 23:55:00 Mar 31 2018 01:05:00 Jul 1 2018
cryptographic-algorithm hmac-sha-256
…
…
…
interface GigabitEthernet0/1
no switchport
ip address x.x.x.x 255.255.255.0
ip ospf authentication key-chain OSPF_KEY_CHAIN

If a NIST-validated FIPS 198-1 message authentication code algorithm is not being used to authenticate routing protocol messages, this is a finding.

Check Content Reference

M

Target Key

4065

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