STIGQter: STIG Summary: Cisco NX-OS 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-221075r622190_rule

Vulnerability Number

V-221075

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
SW1(config-keychain)# key 1
SW1(config-keychain-key)# key-string xxxxxxxxxxxx
SW1(config-keychain-key)# send-lifetime 00:00:00 Oct 1 2019 23:59:59 Dec 31 2019
SW1(config-keychain-key)# accept-lifetime 00:00:00 Oct 1 2019 01:05:00 Jan 1 2020
SW1(config-keychain-key)# cryptographic-algorithm hmac-sha-256
SW1(config-keychain-key)# key 2
SW1(config-keychain-key)# key-string kxxxxxxxxxxxxx
SW1(config-keychain-key)# send-lifetime 00:00:00 Jan 1 2020 23:59:59 Mar 31 2020
SW1(config-keychain-key)# accept-lifetime 23:55:00 Dec 31 2019 01:05:00 Apr 1 2020
SW1(config-keychain-key)# cryptographic-algorithm hmac-sha-256
SW1(config-keychain-key)# end
SW1(config)# int e2/2
SW2(config-if)# ip ospf authentication key-chain OSPF_KEY

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
key 1
key-string 7 070d2e4e4c10
accept-lifetime 00:00:00 Oct 01 2019 01:05:00 Jan 01 2020
send-lifetime 00:00:00 Oct 01 2019 23:59:59 Dec 31 2019
cryptographic-algorithm hmac-sha-256
key 2
key-string 7 0704205e4b07
accept-lifetime 23:55:00 Dec 31 2019 01:05:00 Apr 01 2020
send-lifetime 00:00:00 Jan 01 2020 23:59:59 Mar 31 2020
cryptographic-algorithm hmac-sha-256
…
…
…
interface Ethernet2/2
no switchport
ip ospf authentication key-chain OSPF_KEY

Note: BGP, RIP, EIGRP, IS-IS do not support any FIPS 198-1 HMAC algorithms.

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-221075

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
key 1
key-string 7 070d2e4e4c10
accept-lifetime 00:00:00 Oct 01 2019 01:05:00 Jan 01 2020
send-lifetime 00:00:00 Oct 01 2019 23:59:59 Dec 31 2019
cryptographic-algorithm hmac-sha-256
key 2
key-string 7 0704205e4b07
accept-lifetime 23:55:00 Dec 31 2019 01:05:00 Apr 01 2020
send-lifetime 00:00:00 Jan 01 2020 23:59:59 Mar 31 2020
cryptographic-algorithm hmac-sha-256
…
…
…
interface Ethernet2/2
no switchport
ip ospf authentication key-chain OSPF_KEY

Note: BGP, RIP, EIGRP, IS-IS do not support any FIPS 198-1 HMAC algorithms.

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

4075

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