SV-12536r2: The SYSTEM attribute must not be set to NONE for any account. | AIX 6.1 SECURITY TECHNICAL IMPLEMENTATION GUIDE

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Assessment Title

Rule Text

The SYSTEM attribute must not be set to NONE for any account.

Description

Discussion Text

The SYSTEM attribute in /etc/security/user defines the mechanisms used to authenticate specific user accounts. If the value is set to NONE, other attributes will be used to determine the authentication mechanisms, but if these attributes are not present, no authentication will be performed. To ensure authentication is always used for the system's accounts, the SYSTEM attribute must always be set to a valid setting other than NONE.

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

IA Controls

NIST SP 800-53

Not mappedCCI-000225Not mappedCCI-000764

Additional Details

Responsibility

System Administrator

IA Controls

IAIA-1, IAIA-2

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:7
# The SYSTEM attribute must not be set to NONE for any account.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# all instances of SYSTEM are OK
# textfilecontent54_object (textfilecontent54_test)
test_1() {
  (sed -En 's/^[ 	]*SYSTEM[ 	]*=([^
]*)$/\1/p' '/etc/security/user') | grep -Pq '.*NONE.*'
}

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.aix11:def:7


if [ ! -f "/etc/security/user" ]; then echo "PASS"; exit 0; fi
if grep -q "^[ \t]*SYSTEM[ \t]*=NONE[^\n]*$" /etc/security/user; then echo "FAIL"; exit 1; fi
echo "PASS"; exit 0

Remediation

Edit /etc/security/user and change any SYSTEM=NONE settings to a valid authentication setting.