SV-223114r960963: Internet Explorer Processes for Restrict File Download must be enforced (Explorer). | Microsoft Internet Explorer 11 STIG SCAP Benchmark

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Assessment Title

Rule Text

Internet Explorer Processes for Restrict File Download must be enforced (Explorer).

Description

Discussion Text

In certain circumstances, websites can initiate file download prompts without interaction from users. This technique can allow websites to put unauthorized files on users' hard drives if they click the wrong button and accept the download. If you configure the Restrict File Download\Internet Explorer Processes policy setting to "Enabled", file download prompts that are not user-initiated are blocked for Internet Explorer processes. If you configure this policy setting as "Disabled", prompting will occur for file downloads that are not user-initiated for Internet Explorer processes. Note: This setting is configured as "Enabled" in all environments specified in this guide to help prevent attackers from placing arbitrary code on users' computers.

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

IA Controls

NIST SP 800-53

Not mappedCCI-000381SV-59645V-46779

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:494
# Internet Explorer Processes for Restrict File Download must be enforced (Explorer).
# 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\Security Features\Restrict File Download\Internet Explorer Processes
# 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\Internet Explorer\Main\FeatureControl\FEATURE_RESTRICT_FILEDOWNLOAD').GetValueKind('explorer.exe').ToString()]) -eq 'reg_sz') -and (((Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_RESTRICT_FILEDOWNLOAD' -Name 'explorer.exe' -ErrorAction SilentlyContinue) | Select-Object -ExpandProperty 'explorer.exe') -eq 1))
}

if (-not (test_1)) {
  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:494
$compliant = Test-Path -Path "HKLM:\Software\Policies\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_RESTRICT_FILEDOWNLOAD" -ErrorAction SilentlyContinue; if ($compliant) { $regValue = Get-ItemProperty -Path "HKLM:\Software\Policies\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_RESTRICT_FILEDOWNLOAD" -ErrorAction SilentlyContinue; if ($regValue.type -eq "reg_sz" -and $regValue.value -eq 1) { Write-Output "PASS"; Exit 0 } } Write-Output "FAIL"; Exit 1

Remediation

Set the policy value for Computer Configuration -> Administrative Templates -> Windows Components -> Internet Explorer -> Security Features -> Restrict File Download -> 'Internet Explorer Processes' to 'Enabled'.