SV-37192r1: All run control scripts must have mode 0755 or less permissive. | Red Hat Enterprise Linux 5 Security Technical Implementation Guide

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Assessment Title

Rule Text

All run control scripts must have mode 0755 or less permissive.

Description

Discussion Text

If the startup files are writable by other users, they could modify the startup files to insert malicious commands into the startup files.

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.

#!/bin/bash
# Reconstructed from oval:mil.disa.fso.rhel11:def:121
# All run control scripts must have mode 0755 or less permissive.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.
#
# MANUAL REVIEW REQUIRED -- the module(s) below could not be reconstructed
# into working code from curated SCC reference data, and are excluded from
# the automated result:
#   - file_object (file_test) -- rc* scripts in /etc/ must be 0755: <set> composition (base object oval:mil.disa.fso.rhel11:obj:12100): member unresolved -- no extractor for field "owrite"
#   - file_object (file_test) -- scripts in /etc/rc*.d/* must be 0755: <set> composition (base object oval:mil.disa.fso.rhel11:obj:12101): member unresolved -- no extractor for field "owrite"
#   - file_object (file_test) -- scripts in /etc/init.d/* must be 0755: <set> composition (base object oval:mil.disa.fso.rhel11:obj:12102): member unresolved -- no extractor for field "owrite"

echo "MANUAL REVIEW REQUIRED -- see notes above; no part of this check could be automated"

Remediation

Ensure all system startup files have mode 0755 or less permissive. Examine the "rc" files, and all files in the rc1.d (rc2.d, and so on) directories, and in the /etc/init.d directory to ensure they are not world-writable. If they are world-writable, use the chmod command to correct the vulnerability and research why they are world-writable.

Procedure: 
# chmod 755 <startup file>