SV-35931r2: Unauthorized accounts must not have the Change the system time user right. | Windows 7 Security Technical Implementation Guide

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Assessment Title

Rule Text

Unauthorized accounts must not have the Change the system time user right.

Description

Discussion Text

Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities. Accounts with the "Change the system time" user right can change the system time, which can impact authentication, as well as affect time stamps on event log entries.

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

IA Controls

NIST SP 800-53

Not mappedCCI-002235CCE-8612-4

Additional Details

Responsibility

System Administrator

References

DPMS Target Windows 7 DISA DPMS Target Windows 7 1712

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.

# Windows PowerShell
# Reconstructed from oval:mil.disa.fso.windows:def:4404
# Unauthorized accounts must not have the Change the system time user right.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# Change the system time - Administrators, Local Service
# accesstoken_object (accesstoken_test)
function test_1 {
  return (($__tmp = "$env:TEMP\scc_userrights_$([guid]::NewGuid().Guid).cfg"; secedit /export /cfg $__tmp /areas USER_RIGHTS /quiet | Out-Null; $__m = Select-String -Path $__tmp -Pattern '^SeSystemtimePrivilege\s*=\s*(.+)$'; Remove-Item $__tmp -ErrorAction SilentlyContinue; if ($__m -and $__m.Matches[0].Groups[1].Value.Trim().Length -gt 0) { '1' } else { '0' }) -eq '0')
}

if (test_1) {
  Write-Output "PASS"
} else {
  Write-Output "FAIL"
}

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_7 target this check assesses.

# OVAL Definition: oval:mil.disa.fso.windows:def:4404
$groupPolicy = Get-LocalGroupPolicy -All | Where-Object {$_.Name -eq 'User Rights Assignment'} | Get-LocalSecurityPolicySetting -Name 'Change the system time'
if ($groupPolicy.Value -eq 'Administrators, Local Service') {Write-Output "PASS"; exit 0} else {Write-Output "FAIL"; exit 1}

Remediation

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Change the system time" to only include the following accounts or groups:

				Administrators
				Local Service