STIGQter: STIG Summary: Cisco ASA NDM Security Technical Implementation Guide Version: 2 Release: 5 Benchmark Date: 01 Jul 2026:

The Cisco ASA must be configured to implement cryptographic mechanisms using a FIPS 140-2 approved algorithm to protect the confidentiality of remote maintenance sessions.

DISA Rule

SV-239931r961557_rule

Vulnerability Number

V-239931

Group Title

SRG-APP-000412-NDM-000331

Rule Version

CASA-ND-001150

Severity

CAT I

CCI(s)

• CCI-003123 - Implement organization-defined cryptographic mechanisms to protect the confidentiality of nonlocal maintenance and diagnostic communications.

Weight

10

Fix Recommendation

Step 1: Enable FIPS mode via the fips enable command.

Step 2: Configure SSH to only use FIPS-compliant ciphers and Diffie-Hellman Group 14 for the key exchange.

ASA(config)# ssh cipher encryption fips
ASA(config)# ssh key-exchange group dh-group14-sha

Check Contents

Step 1: Verify FIPS mode is enabled as shown in the example below.

fips enable

Step 2: Verify that only SSH is configured to only use FIPS-compliant ciphers and that Diffie-Hellman Group 14 is used for the key exchange as shown in the example below.

ssh version 2
ssh cipher encryption fips
ssh key-exchange group dh-group14-sha1

Note: The ASA only supports SSHv2.

If the ASA is not configured to implement cryptographic mechanisms to protect the confidentiality of remote maintenance sessions using a FIPS 140-2 approved algorithm, this is a finding.

Vulnerability Number

V-239931

Documentable

False

Rule Version

CASA-ND-001150

Severity Override Guidance

Step 1: Verify FIPS mode is enabled as shown in the example below.

fips enable

Step 2: Verify that only SSH is configured to only use FIPS-compliant ciphers and that Diffie-Hellman Group 14 is used for the key exchange as shown in the example below.

ssh version 2
ssh cipher encryption fips
ssh key-exchange group dh-group14-sha1

Note: The ASA only supports SSHv2.

If the ASA is not configured to implement cryptographic mechanisms to protect the confidentiality of remote maintenance sessions using a FIPS 140-2 approved algorithm, this is a finding.

Check Content Reference

M

Target Key

5342