The Juniper SRX Services Gateway VPN must implement a FIPS-140-2 validated Diffie-Hellman (DH) group.

From Juniper SRX SG VPN Security Technical Implementation Guide

Associated with: CCI-000068

SV-81137r1_rule The Juniper SRX Services Gateway VPN must implement a FIPS-140-2 validated Diffie-Hellman (DH) group.

Vulnerability 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 in which the key was derived from. 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 a FIPS-validated dh-group. [edit] show security ike View the IKE options dh-group option. If the IKE option is not set to a FIPS-140-2 validated dh-group, this is a finding.

Fix text

The following command is an example of how to configure the IKE (phase 1) proposals. The following groups are allowed for use in DoD: DH Groups 14 (2048-bit MODP) - 19 (256-bit Random ECP), 20 (384-bit Random ECP), 5 (1536-bit MODP), 24 (2048-bit MODP with 256-bit POS). Example: [edit] set security ike proposal dh-group group14

Pro Tips

Lavender hyperlinks in small type off to the right (of CSS class id, if you view the page source) point to globally unique URIs for each document and item. Copy the link location and paste anywhere you need to talk unambiguously about these things.

You can obtain data about documents and items in other formats. Simply provide an HTTP header Accept: text/turtle or Accept: application/rdf+xml.