SV-35163r1: The aliases file must be group-owned by root, sys, bin, or other. | HP-UX 11.31 Security Technical Implementation Guide

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Assessment Title

Rule Text

The aliases file must be group-owned by root, sys, bin, or other.

Description

Discussion Text

If the alias file is not group-owned by root, bin, sys or other, an unauthorized user may modify the file to add aliases to run malicious code or redirect e-mail.

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 HP-UX 11.31 DISA DPMS Target HP-UX 11.31 2171

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.hpux11:def:258
# The aliases file must be group-owned by root, sys, bin, or other.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# /etc/mail/aliases file is group-owned by root/sys/bin/system
# file_object (file_test)
test_1() {
  ( [ "$(stat -c '%g' '/etc/mail/aliases')" -eq 0 ] ) || ( [ "$(stat -c '%g' '/etc/mail/aliases')" -eq 1 ] ) || ( [ "$(stat -c '%g' '/etc/mail/aliases')" -eq 2 ] ) || ( [ "$(stat -c '%g' '/etc/mail/aliases')" -eq 3 ] )
}

if test_1; 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.hpux11:def:258
if [ ! -f "/etc/mail/aliases" ]; then echo "PASS"; exit 0; fi; [ $(stat -c "%G" /etc/mail/aliases) = root ] || [ $(stat -c "%G" /etc/mail/aliases) = sys ] || [ $(stat -c "%G" /etc/mail/aliases) = bin ] || [ $(stat -c "%G" /etc/mail/aliases) = system ] || { echo "FAIL"; exit 1; } ; echo "PASS"; exit 0

Remediation

Change the group-owner of the /etc/mail/aliases file.
# chgrp root /etc/mail/aliases