SV-223051r961089: The Download signed ActiveX controls property must be disallowed (Restricted Sites zone). | Microsoft Internet Explorer 11 STIG SCAP Benchmark

Loading benchmark…

Assessment Title

Rule Text

The Download signed ActiveX controls property must be disallowed (Restricted Sites zone).

Description

Discussion Text

ActiveX controls can contain potentially malicious code and must only be allowed to be downloaded from trusted sites. Signed code is better than unsigned code in that it may be easier to determine its author, but it is still potentially harmful, especially when coming from an untrusted zone.

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

IA Controls

NIST SP 800-53

Not mappedCCI-001169SV-59437V-46573

References

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

Checks

OVAL

oval:mil.disa.fso.ie:var:43600 ← xccdf_mil.disa.stig_value_DownloadSignedActiveXControls_RestrictedSitesZone_LocalComputer_var

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:436
# The Download signed ActiveX controls property must be disallowed (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.

# Computer Configuration\Network\Internet Explorer\Internet Control Panel\Security Page\Restricted Sites Zone\Download signed ActiveX controls
# 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\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\4').GetValueKind('1001').ToString()]) -eq 'reg_dword') -and (((Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\4' -Name '1001' -ErrorAction SilentlyContinue) | Select-Object -ExpandProperty '1001') -eq 3))
}

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 ms_ie11 target this check assesses.

# OVAL Definition: oval:mil.disa.fso.ie:def:436
$regPath = "HKLM:\Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\4\1001"
if (Test-Path $regPath) {
    $regValue = (Get-ItemProperty -Path $regPath -ErrorAction SilentlyContinue).PSObject.Properties["3"].Value
    if ($regValue -eq 3) {
        Write-Output "PASS"; exit 0
    }
}
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 -> 'Download signed ActiveX controls' to 'Enabled', and select 'Disable' from the drop-down box.