SV-26510r1: System audit tool executables must have mode 0750 or less permissive. | Red Hat Enterprise Linux 5 Security Technical Implementation Guide

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Assessment Title

Rule Text

System audit tool executables must have mode 0750 or less permissive.

Description

Discussion Text

To prevent unauthorized access or manipulation of system audit logs, the tools for manipulating those logs must be protected.

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

IA Controls

NIST SP 800-53

Not mappedCCI-001493

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:176
# System audit tool executables must have mode 0750 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.

# check /sbin/auditctl permissions
# file_object (file_test)
test_1() {
  ( (stat -c '%A' '/sbin/auditctl' | awk '{print (substr($0,7,1)=="s" || substr($0,7,1)=="S")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/sbin/auditctl' | awk '{print (substr($0,4,1)=="s" || substr($0,4,1)=="S")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/sbin/auditctl' | awk '{print (substr($0,10,1)=="x" || substr($0,10,1)=="t")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/sbin/auditctl' | awk '{print (substr($0,8,1)=="r")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/sbin/auditctl' | awk '{print (substr($0,9,1)=="w")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/sbin/auditctl' | awk '{print (substr($0,6,1)=="w")?"true":"false"}') | grep -qxF 'false' )
}
# check /sbin/auditd permissions
# file_object (file_test)
test_2() {
  ( (stat -c '%A' '/sbin/auditd' | awk '{print (substr($0,7,1)=="s" || substr($0,7,1)=="S")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/sbin/auditd' | awk '{print (substr($0,4,1)=="s" || substr($0,4,1)=="S")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/sbin/auditd' | awk '{print (substr($0,10,1)=="x" || substr($0,10,1)=="t")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/sbin/auditd' | awk '{print (substr($0,8,1)=="r")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/sbin/auditd' | awk '{print (substr($0,9,1)=="w")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/sbin/auditd' | awk '{print (substr($0,6,1)=="w")?"true":"false"}') | grep -qxF 'false' )
}
# check /sbin/ausearch permissions
# file_object (file_test)
test_3() {
  ( (stat -c '%A' '/sbin/ausearch' | awk '{print (substr($0,7,1)=="s" || substr($0,7,1)=="S")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/sbin/ausearch' | awk '{print (substr($0,4,1)=="s" || substr($0,4,1)=="S")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/sbin/ausearch' | awk '{print (substr($0,10,1)=="x" || substr($0,10,1)=="t")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/sbin/ausearch' | awk '{print (substr($0,8,1)=="r")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/sbin/ausearch' | awk '{print (substr($0,9,1)=="w")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/sbin/ausearch' | awk '{print (substr($0,6,1)=="w")?"true":"false"}') | grep -qxF 'false' )
}
# check /sbin/aureport permissions
# file_object (file_test)
test_4() {
  ( (stat -c '%A' '/sbin/aureport' | awk '{print (substr($0,7,1)=="s" || substr($0,7,1)=="S")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/sbin/aureport' | awk '{print (substr($0,4,1)=="s" || substr($0,4,1)=="S")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/sbin/aureport' | awk '{print (substr($0,10,1)=="x" || substr($0,10,1)=="t")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/sbin/aureport' | awk '{print (substr($0,8,1)=="r")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/sbin/aureport' | awk '{print (substr($0,9,1)=="w")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/sbin/aureport' | awk '{print (substr($0,6,1)=="w")?"true":"false"}') | grep -qxF 'false' )
}
# check /sbin/autrace permissions
# file_object (file_test)
test_5() {
  ( (stat -c '%A' '/sbin/autrace' | awk '{print (substr($0,7,1)=="s" || substr($0,7,1)=="S")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/sbin/autrace' | awk '{print (substr($0,4,1)=="s" || substr($0,4,1)=="S")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/sbin/autrace' | awk '{print (substr($0,10,1)=="x" || substr($0,10,1)=="t")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/sbin/autrace' | awk '{print (substr($0,8,1)=="r")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/sbin/autrace' | awk '{print (substr($0,9,1)=="w")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/sbin/autrace' | awk '{print (substr($0,6,1)=="w")?"true":"false"}') | grep -qxF 'false' )
}
# check /sbin/audispd permissions
# file_object (file_test)
test_6() {
  ( (stat -c '%A' '/sbin/audispd' | awk '{print (substr($0,7,1)=="s" || substr($0,7,1)=="S")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/sbin/audispd' | awk '{print (substr($0,4,1)=="s" || substr($0,4,1)=="S")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/sbin/audispd' | awk '{print (substr($0,10,1)=="x" || substr($0,10,1)=="t")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/sbin/audispd' | awk '{print (substr($0,8,1)=="r")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/sbin/audispd' | awk '{print (substr($0,9,1)=="w")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/sbin/audispd' | awk '{print (substr($0,6,1)=="w")?"true":"false"}') | grep -qxF 'false' )
}

if ( test_1 && test_2 && test_3 && test_4 && test_5 && test_6 ); 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:176
if [ ! -f "/sbin/auditctl" ]; then echo "PASS"; exit 0; fi; [ "$(stat -c "%a /sbin/auditctl" | awk '{print $1}')" -gt 750 ] && echo "FAIL" || echo "PASS"; exit 0
if [ ! -f "/sbin/auditd" ]; then echo "PASS"; exit 0; fi; [ "$(stat -c "%a /sbin/auditd" | awk '{print $1}')" -gt 750 ] && echo "FAIL" || echo "PASS"; exit 0
if [ ! -f "/sbin/ausearch" ]; then echo "PASS"; exit 0; fi; [ "$(stat -c "%a /sbin/ausearch" | awk '{print $1}')" -gt 750 ] && echo "FAIL" || echo "PASS"; exit 0
if [ ! -f "/sbin/aureport" ]; then echo "PASS"; exit 0; fi; [ "$(stat -c "%a /sbin/aureport" | awk '{print $1}')" -gt 750 ] && echo "FAIL" || echo "PASS"; exit 0

Remediation

Change the mode of the audit tool executable to 0750, or less permissive.
# chmod 0750 [audit tool executable]