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 replay-resistant authentication mechanisms for network access to privileged accounts.

DISA Rule

SV-239913r960993_rule

Vulnerability Number

V-239913

Group Title

SRG-APP-000156-NDM-000250

Rule Version

CASA-ND-000470

Severity

CAT II

CCI(s)

• CCI-001941 - Implement replay-resistant authentication mechanisms for access to privileged accounts and/or non-privileged accounts.

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 that FIPS mode is enabled as shown in the example.

fips enable

Step 2: Verify 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 replay-resistant authentication mechanisms for network access, this is a finding.

Vulnerability Number

V-239913

Documentable

False

Rule Version

CASA-ND-000470

Severity Override Guidance

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

fips enable

Step 2: Verify 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 replay-resistant authentication mechanisms for network access, this is a finding.

Check Content Reference

M

Target Key

5342