SV-29656r1: The built-in guest account is not disabled. | Windows Vista Security Technical Implementation Guide

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Assessment Title

Rule Text

The built-in guest account is not disabled.

Description

Discussion Text

A system faces an increased vulnerability threat if the built-in guest account is not disabled. This account is a known account that exists on all Windows systems and cannot be deleted. This account is initialized during the installation of the operating system with no password assigned. This account is a member of the Everyone user group and has all the rights and permissions associated with that group, which could subsequently provide access to system resources to anonymous users.

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

IA Controls

NIST SP 800-53

Not mappedCCI-000804CCE-3248-2

Additional Details

Responsibility

System Administrator

References

DPMS Target Windows Vista DISA DPMS Target Windows Vista 1029

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.

Assessment Script Powered by AISyntax-verified

A standalone PowerShell script to assess this control automatically. Review before running it in your environment.

Syntax-checked as valid PowerShell. Not executed here — running it for real needs the actual windows_vista target this check assesses.

$guestAccount = Get-CimInstance -ClassName Win32_UserAccount -Filter "Name = 'Guest'"
if ($guestAccount -and $guestAccount.LocalAccount -and $guestAccount.AccountType -eq 3 -and $guestAccount.SpecialAccount -contains 'Guest' -and $guestAccount.PasswordRequired -and $guestAccount.AccountEnabled -eq $false) {
    Write-Output "PASS"
    exit 0
} else {
    Write-Output "FAIL"
    exit 1
}

Remediation

Configure the system to disable the built-in guest Account.