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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

1 mapping across 4 frameworks
SCF0 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (1) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

NET-14.2Protection of Confidentiality / Integrity Using Encryption
1.00
NIST 800-530 mappings

No source states a mapping between these directly.

Also reachable in 2 hops (31) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

AC-17(1)Monitoring and Control
1.00
AC-17(2)Protection of Confidentiality and Integrity Using Encryption
1.00
AC-3Access Enforcement
1.00
CM-6Configuration Settings
1.00
CM-7Least Functionality
1.00
IA-2(8)Access to Accounts — Replay Resistant
1.00
IA-2(9)Network Access to Non-privileged Accounts — Replay Resistant
1.00
IA-3Device Identification and Authentication
1.00
IA-3(1)Cryptographic Bidirectional Authentication
1.00
IA-5(1)Password-based Authentication
1.00

+21 more (top 10 by confidence shown)

NIST 800-1710 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (1) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

3.1.13
1.00
CCI1 mapping
CCI-001453
1.00

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