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The Cisco ASA remote access VPN server must be configured to use SHA-2 at 384 bits or greater for hashing to protect the integrity of IPsec remote access sessions.

Overview

Finding IDVersionRule IDIA ControlsSeverity
V-239978CASA-VN-000630SV-239978r916146_ruleCCI-001453medium
Description
Without strong cryptographic integrity protections, information can be altered by unauthorized users without detection. SHA-1 is considered a compromised hashing standard and is being phased out of use by industry and Government standards. DOD systems must not be configured to use SHA-1 for integrity of remote access sessions. The remote access VPN provides access to DOD nonpublic information systems by an authorized user (or an information system) communicating through an external, non-organization-controlled network.
STIGDate
Cisco ASA VPN Security Technical Implementation Guide2024-08-22

Related Frameworks

3 paths across 3 frameworks
NIST 800-531 mapping
AC-17(2)
1.00
  • DISA · V2R2 · disa_xccdf · related
  • DISA · 2025-01-23 · disa_cci_list · equivalent
NIST 800-1711 mapping
3.1.13
1.00
  • DISA · V2R2 · disa_xccdf · related
  • DISA · 2025-01-23 · disa_cci_list · equivalent
  • NIST · Rev 2 (Feb 2020, errata Jan 2021) · nist_800_171_app_d · equivalent
CCI1 mapping
CCI-001453
1.00
  • DISA · V2R2 · disa_xccdf · related

Details

Check Text (C-239978r916146_chk)

Verify that the ASA uses SHA-2 at 384 bits or greater for hashing to protect the integrity of IPsec remote access sessions as shown in the example below. Step 1: Verify that SHA-2 at 384 bits or greater is used for IKE Phase 1 as shown in the example below. crypto ikev2 policy 1 … … … integrity sha384 Step 2: Verify that SHA-2 at 384 bits or greater is used for the IPsec Security Association. crypto ipsec ikev2 ipsec-proposal IPSEC_TRANS protocol esp integrity sha-384 If the ASA does not use SHA-2 at 384 bits or greater for hashing to protect the integrity of IPsec remote access sessions, this is a finding.

Fix Text (F-43170r916136_fix)

Configure the ASA to use SHA-2 at 384 bits or greater for hashing to protect the integrity of IPsec remote access sessions as shown in the example below. ASA1(config)# crypto ikev2 policy 1 ASA1(config-ikev2-policy)# integrity sha384 ASA1(config-ikev2-policy)# exit ASA1(config)# crypto ipsec ikev2 ipsec-proposal IPSEC_TRANS ASA1(config-ipsec-proposal)# protocol esp integrity sha-384 ASA1(config-ikev2-policy)# end