SV-281014r1165397: RHEL 10 must use FIPS 140-3-approved cryptographic algorithms for IP tunnels. | Red Hat Enterprise Linux 10 STIG SCAP Benchmark

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Assessment Title

Rule Text

RHEL 10 must use FIPS 140-3-approved cryptographic algorithms for IP tunnels.

Description

Discussion Text

Overriding the systemwide cryptographic policy makes the behavior of the Libreswan service violate expectations and makes system configuration more fragmented.

How this relates to the STIG checklist: STIG vs SCAP benchmark.

IA Controls

NIST SP 800-53

Not mappedCCI-000068

References

DPMS Target Red Hat Enterprise Linux 10 DISA DPMS Target Red Hat Enterprise Linux 10 5733

SCC Automation Reference

The reconstructed evaluation script behind this rule's OVAL check(s) — every module a compound check combines, with this rule's own concrete values and DISA's SCC tool's real per-module mechanism curated from static teardown of SCC releases.

#!/bin/bash
# Reconstructed from oval:mil.disa.stig.rhel10os:def:281014
# RHEL 10 must use FIPS 140-3-approved cryptographic algorithms for IP tunnels.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# ipsec.conf includes crypto-policy
# textfilecontent54_object (textfilecontent54_test)
test_1() {
  (sed -En 's/^\s*include\s+(.*)\s*$/\1/p' '/etc/ipsec.conf') | grep -qxF '/etc/crypto-policies/back-ends/libreswan.config'
}
# ipsec.conf includes /etc/ipsec.d/*.conf
# textfilecontent54_object (textfilecontent54_test)
test_2() {
  (sed -En 's/^\s*include\s+(.*)\s*$/\1/p' '/etc/ipsec.conf') | grep -qxF '/etc/ipsec.d/*.conf'
}
# /etc/ipsec.d/*.conf includes crypto-policy
# textfilecontent54_object (textfilecontent54_test)
test_3() {
  (grep -rhP --include='*.conf' '^\s*include\s+(.*)\s*$' '/etc/ipsec.d' | sed -En 's/^\s*include\s+(.*)\s*$/\1/p') | grep -qxF '/etc/crypto-policies/back-ends/libreswan.config'
}

if ( test_1 || ( test_2 && test_3 ) ); then
  echo "PASS"
else
  echo "FAIL"
fi

Assessment Script Powered by AISandbox-executed

A standalone Shell script to assess this control automatically. Review before running it in your environment.

Syntax-checked and actually executed in an isolated sandbox (not the real system this checks) — confirmed to run without errors.

#!/bin/sh
# oval:mil.disa.stig.rhel10os:def:281014 compliance check
if [ ! -f "/etc/ipsec.conf" ]; then echo "PASS"; exit 0; fi
if [ $(grep -c "^\\s*include\\s+/etc/crypto-policies/back-ends/libreswan.config\\s*$" /etc/ipsec.conf) -ge 1 ] || \
  [ $(grep -l "^\\s*include\\s+/etc/ipsec.d/.*\\.conf\\s*$" /etc/ipsec.conf | xargs grep -c "^\\s*include\\s+/etc/crypto-policies/back-ends/libreswan.config\\s*$") -ge 1 ]; then
  echo "PASS"; exit 0; fi
echo "FAIL"; exit 1

Remediation

Configure RHEL 10 so that Libreswan uses the systemwide cryptographic policy.

Add the following line to "/etc/ipsec.conf":

include /etc/crypto-policies/back-ends/libreswan.config