SV-283450r1188541: OL 8 IP tunnels must use FIPS 140-3-approved cryptographic algorithms. | Oracle Linux 8 STIG SCAP Benchmark

Loading benchmark…

Assessment Title

Rule Text

OL 8 IP tunnels must use FIPS 140-3-approved cryptographic algorithms.

Description

Discussion Text

Overriding the system crypto 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 Oracle Linux 8 DISA DPMS Target Oracle Linux 8 5416

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.ol8os:def:283450
# OL 8 IP tunnels must use FIPS 140-3-approved cryptographic algorithms.
# 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 Definition: oval:mil.disa.stig.ol8os:def:283450

if grep -q "^\\s*include\\s+/etc/crypto-policies/back-ends/libreswan.config\\s*$" /etc/ipsec.conf; then
  echo "PASS"
  exit 0
elif grep -q "^\\s*include\\s+/etc/ipsec.d/.*\\.conf\\s*$" /etc/ipsec.conf && grep -q "^\\s*include\\s+/etc/crypto-policies/back-ends/libreswan.config\\s*$" /etc/ipsec.d/$(find /etc/ipsec.d -name "*.conf" -print -maxdepth 0); then
  echo "PASS"
  exit 0
else
  echo "FAIL"
  exit 1
fi

Remediation

Configure Libreswan to use the system cryptographic policy.

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

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