SV-223055r961089: VBScript must not be allowed to run in Internet Explorer (Restricted Sites zone). | Microsoft Internet Explorer 11 STIG SCAP Benchmark

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Assessment Title

Rule Text

VBScript must not be allowed to run in Internet Explorer (Restricted Sites zone).

Description

Discussion Text

This policy setting allows the management of whether VBScript can be run on pages from the specified zone in Internet Explorer. By selecting "Enable" in the drop-down box, VBScript can run without user intervention. By selecting "Prompt" in the drop-down box, users are asked to choose whether to allow VBScript to run. By selecting "Disable" in the drop-down box, VBScript is prevented from running. If this policy setting is not configured or disabled, VBScript will run without user intervention.

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

IA Controls

NIST SP 800-53

Not mappedCCI-001169SV-89851V-75171

References

DPMS Target Microsoft Internet Explorer 11 DISA DPMS Target Microsoft Internet Explorer 11 4095

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.ie:def:589
# VBScript must not be allowed to run in Internet Explorer (Restricted Sites zone).
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# Verifies the OS Version is equal to or greater than 6.3
# registry_object (registry_test)
function test_1 {
  return (((@{String='reg_sz';ExpandString='reg_expand_sz';Binary='reg_binary';DWord='reg_dword';MultiString='reg_multi_sz';QWord='reg_qword';None='reg_none'}[(Get-Item -Path 'Registry::HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion').GetValueKind('CurrentVersion').ToString()]) -eq 'reg_sz') -and (((Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion' -Name 'CurrentVersion' -ErrorAction SilentlyContinue) | Select-Object -ExpandProperty 'CurrentVersion') -ge '6.3'))
}
# Verifies the OS Build is equal to or greater than 15063
# registry_object (registry_test)
function test_2 {
  return (((@{String='reg_sz';ExpandString='reg_expand_sz';Binary='reg_binary';DWord='reg_dword';MultiString='reg_multi_sz';QWord='reg_qword';None='reg_none'}[(Get-Item -Path 'Registry::HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion').GetValueKind('CurrentBuildNumber').ToString()]) -eq 'reg_sz') -and (((Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion' -Name 'CurrentBuildNumber' -ErrorAction SilentlyContinue) | Select-Object -ExpandProperty 'CurrentBuildNumber') -ge '15063'))
}
# Computer Configuration -> Administrative Templates -> Windows Components -> Internet Explorer -> Internet Control Panel -> Security Page -> Restricted Sites Zone -> 'Allow VBScript to run in Internet Explorer' setting is set to 'Enabled' and the drop-down box is set to 'Disable' Group Policy.
# registry_object (registry_test)
function test_3 {
  return (((@{String='reg_sz';ExpandString='reg_expand_sz';Binary='reg_binary';DWord='reg_dword';MultiString='reg_multi_sz';QWord='reg_qword';None='reg_none'}[(Get-Item -Path 'Registry::HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\4').GetValueKind('140C').ToString()]) -eq 'reg_dword') -and (((Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\4' -Name '140C' -ErrorAction SilentlyContinue) | Select-Object -ExpandProperty '140C') -eq 3))
}

if (((test_1 -and test_2) -or test_3)) {
  Write-Output "PASS"
} else {
  Write-Output "FAIL"
}

SCC Assessment

The automated check DISA's SCAP Compliance Checker runs to assess this control. Pick a release below to see exactly what it evaluates on the target system.

SCC version

Not available for this version yet.

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 ms_ie11 target this check assesses.

# OVAL Definition: oval:mil.disa.fso.ie:def:589
$registryPath = "HKLM:\Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\4\140C"
if (-not (Test-Path $registryPath)) { $registryValue = [PSCustomObject]@{Type="reg_dword"; Value=[int]::MinValue} } else { $registryValue = Get-ItemProperty -Path $registryPath -ErrorAction SilentlyContinue }
if (($registryValue.Type -eq "reg_dword" -and $registryValue.Value -eq 3) -or ((Get-CimInstance -ClassName Win32_OperatingSystem).Version -ge "10.0.15063") -and (Get-ItemProperty -Path "HKLM:\Software\Microsoft\Windows\CurrentVersion\Internet Explorer\Main" -Name "AllowVBScript" -ErrorAction SilentlyContinue).AllowVBScript -eq $false) { Write-Output "PASS"; Exit 0 } else { Write-Output "FAIL"; Exit 1 }

Remediation

Set the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Internet Explorer >> Internet Control Panel >> Security Page >> Restricted Sites Zone >> "Allow VBScript to run in Internet Explorer" to "Enabled" and select "Disable" from the drop-down box.