RHEL 9 IP tunnels must use FIPS 140-2/140-3 approved cryptographic algorithms.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-258232	RHEL-09-671020	SV-258232r958408_rule		Medium

Description
Overriding the system crypto policy makes the behavior of the Libreswan service violate expectations, and makes system configuration more fragmented.

STIG	Date
Red Hat Enterprise Linux 9 Security Technical Implementation Guide	2024-06-04

Details

Check Text ( C-61973r926681_chk )
Verify that the IPsec service uses the system crypto policy with the following command: Note: If the ipsec service is not installed, this requirement is Not Applicable. $ sudo grep include /etc/ipsec.conf /etc/ipsec.d/*.conf /etc/ipsec.conf:include /etc/crypto-policies/back-ends/libreswan.config If the ipsec configuration file does not contain "include /etc/crypto-policies/back-ends/libreswan.config", this is a finding.

Check Text ( C-61973r926681_chk )

Verify that the IPsec service uses the system crypto policy with the following command:

Note: If the ipsec service is not installed, this requirement is Not Applicable.

$ sudo grep include /etc/ipsec.conf /etc/ipsec.d/*.conf

/etc/ipsec.conf:include /etc/crypto-policies/back-ends/libreswan.config

If the ipsec configuration file does not contain "include /etc/crypto-policies/back-ends/libreswan.config", this is a finding.

Fix Text (F-61897r926682_fix)
Configure Libreswan to use the system cryptographic policy. Add the following line to "/etc/ipsec.conf": include /etc/crypto-policies/back-ends/libreswan.config