SV-257843r991589: A separate RHEL 9 file system must be used for user home directories (such as /home or an equivalent). | Red Hat Enterprise Linux 9 STIG SCAP Benchmark

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Assessment Title

Rule Text

A separate RHEL 9 file system must be used for user home directories (such as /home or an equivalent).

Description

Discussion Text

Ensuring that "/home" is mounted on its own partition enables the setting of more restrictive mount options, and also helps ensure that users cannot trivially fill partitions used for log or audit data storage.

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

IA Controls

NIST SP 800-53

Not mappedCCI-000366

References

DPMS Target Red Hat Enterprise Linux 9 DISA DPMS Target Red Hat Enterprise Linux 9 5551

Checks

DISA STIG (Manual Reference)

Verify that a separate file system/partition has been created for "/home" with the following command:

$ mount | grep /home

UUID=fba5000f-2ffa-4417-90eb-8c54ae74a32f on /home type ext4 (rw,nodev,nosuid,noexec,seclabel)

If a separate entry for "/home" is not in use, this is a finding.

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.rhel9os:def:257843
# A separate RHEL 9 file system must be used for user home directories (such as /home or an equivalent).
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# A separate operating system filesystem is used for user home directories
# partition_object (partition_test)
test_1() {
  findmnt -n -o FSTYPE,OPTIONS .*\/home &>/dev/null
}

if test_1; 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.rhel9os:def:257843
if [ -d /home ] && [ ! -e /etc/fstab -o $(awk -F\" '/^\/home/ {print $2}' /etc/fstab | grep -q on_rootfs) ]; then echo "FAIL"; exit 1; else echo "PASS"; exit 0; fi

Remediation

Migrate the "/home" directory onto a separate file system/partition.