SV-37396r1: All shell files must be owned by root or bin. | Red Hat Enterprise Linux 5 Security Technical Implementation Guide

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Assessment Title

Rule Text

All shell files must be owned by root or bin.

Description

Discussion Text

If shell files are owned by users other than root or bin, they could be modified by intruders or malicious users to perform unauthorized actions.

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

IA Controls

NIST SP 800-53

Not mappedCCI-000225

Additional Details

Responsibility

System Administrator

IA Controls

ECLP-1

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.

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:154
if [ ! -d "/etc/shells" ]; then echo "PASS"; exit 0; fi; for shell in $(grep -oP '^[^ \t\n\r]*/([^/ \t\n\r]+)' /etc/shells); do if [ ! -f "/etc/shells/$shell" ]; then echo "PASS"; exit 0; fi; uid=$(stat -c "%u" "/etc/shells/$shell"); if [ $uid -eq 0 ] || [ $uid -eq 2 ]; then echo "PASS"; exit 0; fi; done; echo "FAIL"; exit 1

Remediation

Change the ownership of the shell with incorrect ownership.
# chown root <shell>