SV-26978r1: The system must use a Linux Security Module configured to limit the privileges of system services. | Red Hat Enterprise Linux 5 Security Technical Implementation Guide

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Assessment Title

Rule Text

The system must use a Linux Security Module configured to limit the privileges of system services.

Description

Discussion Text

Linux Security Modules such as SELinux and AppArmor can be used to provide protection from software exploits by explicitly defining the privileges permitted to each software package.

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

IA Controls

NIST SP 800-53

Not mappedCCI-000366CCE-3977-6

Additional Details

Responsibility

System Administrator

References

DPMS Target Red Hat 5 DISA DPMS Target Red Hat 5 2154

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.fso.rhel11:def:30
# The system must use a Linux Security Module configured to limit the privileges of system services.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# textfilecontent54_object (textfilecontent54_test)
test_1() {
  (sed -En 's/^SELINUX=(.*)[ 	]*[^

]*$/\1/p' '/etc/sysconfig/selinux') | grep -qxF 'enforcing'
}
# textfilecontent54_object (textfilecontent54_test)
test_2() {
  (sed -En 's/^SELINUXTYPE=(.*)[ 	]*[^

]*$/\1/p' '/etc/sysconfig/selinux') | grep -Pq '^(targeted|strict)$'
}

if ( test_1 && test_2 ); 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.fso.rhel11:def:30
if [ ! -f "/etc/sysconfig/selinux" ]; then echo "PASS"; exit 0; fi
content=$(cat /etc/sysconfig/selinux)
if [[ $content =~ ^SELINUX=enforcing.*$ ]]; then :; else echo "FAIL"; exit 1; fi
if [[ $content =~ ^SELINUXTYPE=(targeted|strict).*$ ]]; then :; else echo "FAIL"; exit 1; fi
echo "PASS"; exit 0

Remediation

Enable one of the SELinux policies.
Edit /etc/sysconfig/selinux and set the value of the SELINUX option to "enforcing" and SELINUXTYPE to "targeted" or "strict".
Restart the system.