The Juniper SRX Services Gateway VPN IKE must use NIST FIPS-validated cryptography to implement encryption services for unclassified VPN traffic.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-66671	JUSX-VN-000024	SV-81161r1_rule		Medium

Description
Use of weak or untested encryption algorithms undermines the purposes of utilizing encryption to protect data. The network element must implement cryptographic modules adhering to the higher standards approved by the federal government since this provides assurance they have been tested and validated.

STIG	Date
Juniper SRX SG VPN Security Technical Implementation Guide	2017-10-03

Details

Check Text ( C-67297r1_chk )
Verify all Internet Key Exchange (IKE) proposals are set to use the AES encryption algorithm. [edit] show security ike View the value of the encryption algorithm for each defined proposal. If the value of the authentication method and other options are not set to use FIPS-compliant values, this is a finding.

Fix Text (F-72747r1_fix)
The following example commands configure the IKE (phase 1) proposal. [edit] set security ike proposal authentication-method rsa-signatures set security ike proposal p1-proposal dh-group group14 set security ike proposal p1-proposal authentication-algorithm sha-256 set security ike proposal p1-proposal encryption-algorithm aes-256-cbc set security ike proposal p1-proposal lifetime-seconds 86400