SV-38738r1: All skeleton files (typically in /etc/skel) must be group-owned by security. | AIX 6.1 SECURITY TECHNICAL IMPLEMENTATION GUIDE

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Assessment Title

Rule Text

All skeleton files (typically in /etc/skel) must be group-owned by security.

Description

Discussion Text

If the skeleton files are not protected, unauthorized personnel could change user start-up parameters and possibly jeopardize user 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 AIX 6.1 DISA DPMS Target AIX 6.1 2176

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.aix11:def:116
# All skeleton files (typically in /etc/skel) must be group-owned by security.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# Check group-ownership /etc/security/.profile
# file_object (file_test)
test_1() {
  [ "$(stat -c '%g' '/etc/security/.profile')" -eq 7 ]
}
# Check group-ownership /etc/security/mkuser.sys
# file_object (file_test)
test_2() {
  [ "$(stat -c '%g' '/etc/security/mkuser.sys')" -eq 7 ]
}

if ( test_1 && test_2 ); 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.aix11:def:116
if [ ! -d "/etc/security" ]; then echo "PASS"; exit 0; fi
if [ -f "/etc/security/.profile" ] && [ $(stat -c "%G" "/etc/security/.profile") = "security" ]; then :; else echo "FAIL"; exit 1; fi
if [ ! -f "/etc/security/mkuser.sys" ]; then echo "PASS"; exit 0; fi
if [ -f "/etc/security/mkuser.sys" ] && [ $(stat -c "%G" "/etc/security/mkuser.sys") = "security" ]; then echo "PASS"; exit 0; else echo "FAIL"; exit 1; fi

Remediation

Change the group owner of the skeleton file to security.

Procedure:
# chgrp security /etc/security/.profile /etc/security/mkuser.sys