SV-38737r1: All skeleton files and directories (typically in /etc/skel) must be owned by root or bin. | AIX 6.1 SECURITY TECHNICAL IMPLEMENTATION GUIDE

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Assessment Title

Rule Text

All skeleton files and directories (typically in /etc/skel) must be owned by root or bin.

Description

Discussion Text

If the skeleton files are not protected, unauthorized personnel could change user startup parameters and possibly jeopardize user files. Failure to give ownership of sensitive files or utilities to root or bin provides the designated owner and unauthorized users with the potential to access sensitive information or change the system configuration which could weaken the system's security posture.

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:115
# All skeleton files and directories (typically in /etc/skel) must be owned by root or bin.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# Check ownership /etc/security/.profile
# file_object (file_test)
test_1() {
  ( [ "$(stat -c '%u' '/etc/security/.profile')" -eq 0 ] ) || ( [ "$(stat -c '%u' '/etc/security/.profile')" -eq 2 ] )
}
# Check ownership /etc/security/mkuser.sys
# file_object (file_test)
test_2() {
  ( [ "$(stat -c '%u' '/etc/security/mkuser.sys')" -eq 0 ] ) || ( [ "$(stat -c '%u' '/etc/security/mkuser.sys')" -eq 2 ] )
}

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:115
if [ ! -f "/etc/security/.profile" ] || [ $(stat -c "%u" "/etc/security/.profile") -eq 0 ] || [ $(stat -c "%u" "/etc/security/.profile") -eq 2 ]; then :; else echo "FAIL"; exit 1; fi
if [ ! -f "/etc/security/mkuser.sys" ] || [ $(stat -c "%u" "/etc/security/mkuser.sys") -eq 0 ] || [ $(stat -c "%u" "/etc/security/mkuser.sys") -eq 2 ]; then :; else echo "FAIL"; exit 1; fi
echo "PASS"; exit 0

Remediation

Change the ownership of skeleton files with incorrect mode.

# chown root /etc/security/.profile /etc/security/mkuser.sys