SV-4351r2: The /etc/security/audit_user file must be group-owned by root, sys, or bin. | SOLARIS 9 SPARC SECURITY TECHNICAL IMPLEMENTATION GUIDE

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Assessment Title

Rule Text

The /etc/security/audit_user file must be group-owned by root, sys, or bin.

Description

Discussion Text

The Solaris audit_user file allows for selective auditing or non-auditing of features for certain users. If it is not protected, it could be compromised and used to mask audit events. This could cause the loss of valuable forensics data in the case of a system compromise.

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 Solaris 9 Sparc DISA DPMS Target Solaris 9 Sparc 21

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.solaris11:def:8
# The /etc/security/audit_user file must be group-owned by root, sys, or bin.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# Test group of /etc/security/audit_user is root
# file_object (file_test)
test_1() {
  [ "$(stat -c '%g' '/etc/security/audit_user')" -eq 0 ]
}
# Test existence of group sys
# textfilecontent54_object (textfilecontent54_test)
test_2() {
  grep -Pq '^sys:[^:]*:([0-9]+):' '/etc/group' &>/dev/null
}
# Test group of /etc/security/audit_user is sys
# file_object (file_test)
test_3() {
  [ "$(stat -c '%g' '/etc/security/audit_user')" = "$(sed -En 's/^sys:[^:]*:([0-9]+):/\1/p' '/etc/group')" ]
}
# Test existence of group bin
# textfilecontent54_object (textfilecontent54_test)
test_4() {
  grep -Pq '^bin:[^:]*:([0-9]+):' '/etc/group' &>/dev/null
}
# Test group of /etc/security/audit_user is bin
# file_object (file_test)
test_5() {
  [ "$(stat -c '%g' '/etc/security/audit_user')" = "$(sed -En 's/^bin:[^:]*:([0-9]+):/\1/p' '/etc/group')" ]
}

if ( test_1 || ( test_2 && test_3 ) || ( test_4 && test_5 ) ); 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:mil.disa.fso.solaris11:def:8 compliance check
if [ ! -f "/etc/security/audit_user" ]; then echo "PASS"; exit 0; fi
if [ "$(stat -c "%G" /etc/security/audit_user)" = "root" ]; then echo "PASS"; exit 0; fi
if [ "$(grep '^sys:[^:]*:' /etc/group | grep -o '[0-9]\+')" = "$(stat -c "%g" /etc/security/audit_user)" ]; then echo "PASS"; exit 0; fi
if [  "$(grep '^bin:[^:]*:' /etc/group | grep -o '[0-9]\+')" = "$(stat -c "%g" /etc/security/audit_user)" ]; then echo "PASS"; exit 0; fi
echo "FAIL"; exit 1

Remediation

Change the group owner of the audit_user file to root, bin, or sys.
Example:
# chgrp root /etc/security/audit_user