The Cisco ASA must be configured to use FIPS-validated SHA-2 at 384 bits or higher for Internet Key Exchange (IKE) Phase 1.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-239958 | SRG-NET-000168-VPN-000600 | CASA-VN-000230 | SV-239958r916134_rule | 2024-08-22 | 2 |
| Description |
|---|
| Without cryptographic integrity protections, information can be altered by unauthorized users without detection. Although allowed by SP800-131Ar2 for some applications, SHA-1 is considered a compromised hashing standard and is being phased out of use by industry and government standards. Unless required for legacy use, DOD systems should not be configured to use SHA-2 for integrity of remote access sessions. |
| ℹ️ Check |
|---|
| Review the ASA configuration to verify that SHA-2 at 384 bits or higher is specified for IKE Phase 1 as shown in the example below. crypto ikev2 policy 1 … integrity sha384 If the ASA is not configured to use SHA-2 at 384 bits or higher for IKE Phase 1, this is a finding. |
| ✔️ Fix |
|---|
| Configure the ASA to use FIPS-validated SHA-2 at 384 bits or higher for IKE Phase 1 as shown in the example below. ASA2(config)# crypto ikev2 policy 1 ASA2(config-ikev2-policy)# integrity sha384 |