SV-45108r1: Automatic prompting for file downloads must be disallowed (Internet zone). | Microsoft Internet Explorer 10 Security Technical Implementation Guide

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Assessment Title

Rule Text

Automatic prompting for file downloads must be disallowed (Internet zone).

Description

Discussion Text

This policy setting determines whether users will be prompted for non user-initiated file downloads. Regardless of this setting, users will receive file download dialogs for user-initiated downloads. Users may accept downloads that they did not request, and those downloaded files may include malicious code. If you enable this setting, users will receive a file download dialog for automatic download attempts. If you disable or do not configure this setting, file downloads that are not user-initiated will be blocked, and users will see the information bar instead of the file download dialog. Users can then click the information bar to allow the file download prompt.

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

Checks

OVAL

oval:mil.disa.fso.ie:var:31400 ← xccdf_mil.disa.stig_value_AutomaticPromptingFileDownloads_InternetZone_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:314
# Automatic prompting for file downloads must be disallowed (Internet 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\Internet Zone\Automatic prompting for file downloads
# 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\3').GetValueKind('2200').ToString()]) -eq 'reg_dword') -and (((Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3' -Name '2200' -ErrorAction SilentlyContinue) | Select-Object -ExpandProperty '2200') -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_ie10 target this check assesses.

# OVAL Definition: oval:mil.disa.fso.ie:def:314
$regPath = "HKLM:\Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3\2200"
if (Test-Path $regPath) {
    $regValue = (Get-ItemProperty -Path $regPath).2200
    if ($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 -> Internet Zone -> "Automatic prompting for file downloads" to "Enabled", and select "Disable" from the drop-down box.