SV-45077r1: ActiveX opt-in prompt must be disallowed. | Microsoft Internet Explorer 10 Security Technical Implementation Guide

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Assessment Title

Rule Text

ActiveX opt-in prompt must be disallowed.

Description

Discussion Text

This policy setting allows you to turn off the ActiveX opt-in prompt. The ActiveX opt-in prevents Websites from loading any COM object without prior approval. If a page attempts to load a COM object that Internet Explorer has not used before, an information bar will appear asking the user for approval. If you enable this policy setting, the ActiveX opt-in prompt will not appear. Internet Explorer does not ask the user for permission to load a control, and will load the ActiveX if it passes all other internal security checks. If you disable or do not configure this policy setting the ActiveX opt-in prompt will appear.

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

Additional Details

Responsibility

System Administrator

References

DPMS Target IE Version 10 DISA DPMS Target IE Version 10 2351

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:391
# ActiveX opt-in prompt must be disallowed.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# Computer Configuration\Administrative Templates\Windows Components\Internet Explorer\Turn off ActiveX opt-in prompt
# 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\CurrentVersion\Policies\Ext').GetValueKind('NoFirsttimeprompt').ToString()]) -eq 'reg_dword') -and (((Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\Ext' -Name 'NoFirsttimeprompt' -ErrorAction SilentlyContinue) | Select-Object -ExpandProperty 'NoFirsttimeprompt') -eq 1))
}

if (-not (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_ie10 target this check assesses.

# OVAL Definition: oval:mil.disa.fso.ie:def:391
$registryPath = "HKLM:\Software\Microsoft\Windows\CurrentVersion\Policies\Ext"
$registryName = "NoFirsttimeprompt"
$registryValue = 1
if (-not (Test-Path $registryPath)) { exit 0 }
if ((Get-ItemProperty -Path $registryPath -Name $registryName -ErrorAction SilentlyContinue).$registryName -eq $registryValue) { exit 1 }
exit 0

Remediation

Set the policy value for Computer Configuration -> Administrative Templates -> Windows Components -> Internet Explorer -> "Turn off ActiveX opt-in prompt" to "Enabled".