SV-230321r1017132: All RHEL 8 local interactive user home directories must have mode 0750 or less permissive. | Red Hat Enterprise Linux 8 STIG SCAP Benchmark

Loading benchmark…

Assessment Title

Rule Text

All RHEL 8 local interactive user home directories must have mode 0750 or less permissive.

Description

Discussion Text

Excessive permissions on local interactive user home directories may allow unauthorized access to user files by other users.

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 8 DISA DPMS Target Red Hat Enterprise Linux 8 2921

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.

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.rhel8os:def:230321
if [ ! -d /etc/passwd ]; then echo "PASS"; exit 0; fi
for user in $(grep '^[^:]*:' /etc/passwd | cut -d: -f1); do
    home=$(grep "^$user:" /etc/passwd | cut -d: -f6)
    [ -z "$home" ] && continue
    [ ! -d "$home" ] && continue
    perms=$(stat -c "%a" "$home")
    [ "$perms" -gt 750 ] && { echo "FAIL: $home has mode $perms"; exit 1; }
done
echo "PASS"
exit 0

Remediation

Change the mode of interactive user’s home directories to "0750". To change the mode of a local interactive user’s home directory, use the following command:

Note: The example will be for the user "smithj".

$ sudo chmod 0750 /home/smithj