SV-45219r1: Internet Explorer must be configured to make proxy settings per user. | Microsoft Internet Explorer 10 Security Technical Implementation Guide

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Assessment Title

Rule Text

Internet Explorer must be configured to make proxy settings per user.

Description

Discussion Text

This setting controls whether or not the Internet Explorer proxy settings are configured on a per-user or per-machine basis. If you enable this policy, users cannot set user specific proxy settings. They must use the zones created for all users of the computer. If you disable this policy or do not configure it, users of the same computer can establish their own proxy settings. This policy is intended to ensure that proxy settings apply uniformly to the same computer and do not vary from user to user.

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:26300 ← xccdf_mil.disa.stig_value_MakeProxySettingsPerMachine_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:263
# Internet Explorer must be configured to make proxy settings per user.
# 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\Make Proxy Settings Per-Machine (Rather Then Per-User)
# 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').GetValueKind('ProxySettingsPerUser').ToString()]) -eq 'reg_dword') -and (((Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings' -Name 'ProxySettingsPerUser' -ErrorAction SilentlyContinue) | Select-Object -ExpandProperty 'ProxySettingsPerUser') -eq 1))
}

if (test_1) {
  Write-Output "PASS"
} else {
  Write-Output "FAIL"
}

Remediation

Set the policy value for Computer Configuration -> Administrative Templates -> Windows Components -> Internet Explorer "Make proxy settings per-machine (rather than per user)" to "Disabled".