Check: SRG-NET-000074-VPN-000250
Virtual Private Network (VPN) SRG:
SRG-NET-000074-VPN-000250
(in version v2 r4)
Title
The IPSec VPN must be configured to use a Diffie-Hellman (DH) Group of 14 or greater for Internet Key Exchange (IKE) Phase 1. (Cat I impact)
Discussion
Use of an approved DH algorithm ensures the Internet Key Exchange (IKE) (Phase 1) proposal uses FIPS-validated key management techniques and processes in the production, storage, and control of private/secret cryptographic keys. The security of the DH key exchange is based on the difficulty of solving the discrete logarithm from which the key was derived. Hence, the larger the modulus, the more secure the generated key is considered to be.
Check Content
Verify all IKE proposals are set to use Diffie-Hellman (DH) Group of 14 or greater for Internet Key Exchange (IKE) Phase 1. View the IKE options dh-group option. If the IKE option is not set to use Diffie-Hellman (DH) Group of 14 or greater for Internet Key Exchange (IKE) Phase 1, this is a finding.
Fix Text
Configure the IPsec VPN to use the Diffie-Hellman (DH) Group of 14 or greater for Internet Key Exchange (IKE) Phase 1.
Additional Identifiers
Rule ID: SV-207193r803424_rule
Vulnerability ID: V-207193
Group Title: SRG-NET-000074
Expert Comments
CCIs
Number | Definition |
---|---|
CCI-000068 |
The information system implements cryptographic mechanisms to protect the confidentiality of remote access sessions. |
Controls
Number | Title |
---|---|
AC-17 (2) |
Protection Of Confidentiality / Integrity Using Encryption |