The Cisco ASA must be configured to use FIPS-validated SHA-2 at 384 bits or higher for Internet Key Exchange (IKE) Phase 1.
An XCCDF Rule
Description
<VulnDiscussion>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.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>
- ID
- SV-239958r916134_rule
- Severity
- Medium
- References
- Updated
Remediation - Manual Procedure
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