Ensure 'Restrict legacy JScript execution for Office' is set to 'Enabled'

MediumLevel 1Automatedintune-office

Description

This policy setting controls JScript execution per Security Zone within Internet Explorer and WebBrowser Control (WebOC) for Office applications. JScript is Microsoft's legacy dialect of the ECMAScript standard that is used in Microsoft's Internet Explorer 11 and older. If Enabled, Office applications will not execute legacy JScript for the Internet or Restricted Sites zones and users aren’t notified by the application that legacy JScript execution is restricted. Modern JScript9 will continue to function for all zones. ... Audit: reads the registry value(s) excel.exe, msaccess.exe, mspub.exe, onenote.exe, outlook.exe, powerpnt.exe, visio.exe, winproj.exe, winword.exe that the Intune policy writes under HKEY_LOCAL_MACHINE and prints compliant only when each satisfies the benchmark value.

How it is checked

Audit method: Windows registry

registry

$bad = @(); $v = (Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\internet explorer\main\featurecontrol\FEATURE_RESTRICT_LEGACY_JSCRIPT_PER_SECURITY_ZONE' -Name 'excel.exe' -ErrorAction SilentlyContinue).'excel.exe'; if (-not ($null -ne $v -and @(69632) -contains [int64]$v)) { $bad += 'excel.exe=' + $v }; $v = (Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\internet explorer\main\featurecontrol\FEATURE_RESTRICT_LEGACY_JSCRIPT_PER_SECURITY_ZONE' -Name 'msaccess.exe' -ErrorAction SilentlyContinue).'msaccess.exe'; if (-not ($null -ne $v -and @(69632) -contains [int64]$v)) { $bad += 'msaccess.exe=' + $v }; $v = (Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\internet explorer\main\featurecontrol\FEATURE_RESTRICT_LEGACY_JSCRIPT_PER_SECURITY_ZONE' -Name 'mspub.exe' -ErrorAction SilentlyContinue).'mspub.exe'; if (-not ($null -ne $v -and @(69632) -contains [int64]$v)) { $bad += 'mspub.exe=' + $v }; $v = (Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\internet explorer\main\featurecontrol\FEATURE_RESTRICT_LEGACY_JSCRIPT_PER_SECURITY_ZONE' -Name 'onenote.exe' -ErrorAction SilentlyContinue).'onenote.exe'; if (-not ($null -ne $v -and @(69632) -contains [int64]$v)) { $bad += 'onenote.exe=' + $v }; $v = (Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\internet explorer\main\featurecontrol\FEATURE_RESTRICT_LEGACY_JSCRIPT_PER_SECURITY_ZONE' -Name 'outlook.exe' -ErrorAction SilentlyContinue).'outlook.exe'; if (-not ($null -ne $v -and @(69632) -contains [int64]$v)) { $bad += 'outlook.exe=' + $v }; $v = (Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\internet explorer\main\featurecontrol\FEATURE_RESTRICT_LEGACY_JSCRIPT_PER_SECURITY_ZONE' -Name 'powerpnt.exe' -ErrorAction SilentlyContinue).'powerpnt.exe'; if (-not ($null -ne $v -and @(69632) -contains [int64]$v)) { $bad += 'powerpnt.exe=' + $v }; $v = (Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\internet explorer\main\featurecontrol\FEATURE_RESTRICT_LEGACY_JSCRIPT_PER_SECURITY_ZONE' -Name 'visio.exe' -ErrorAction SilentlyContinue).'visio.exe'; if (-not ($null -ne $v -and @(69632) -contains [int64]$v)) { $bad += 'visio.exe=' + $v }; $v = (Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\internet explorer\main\featurecontrol\FEATURE_RESTRICT_LEGACY_JSCRIPT_PER_SECURITY_ZONE' -Name 'winproj.exe' -ErrorAction SilentlyContinue).'winproj.exe'; if (-not ($null -ne $v -and @(69632) -contains [int64]$v)) { $bad += 'winproj.exe=' + $v }; $v = (Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\internet explorer\main\featurecontrol\FEATURE_RESTRICT_LEGACY_JSCRIPT_PER_SECURITY_ZONE' -Name 'winword.exe' -ErrorAction SilentlyContinue).'winword.exe'; if (-not ($null -ne $v -and @(69632) -contains [int64]$v)) { $bad += 'winword.exe=' + $v }; if ($bad.Count -eq 0) { 'compliant' } else { 'non-compliant: ' + ($bad -join ', ') }

Expected output: compliant

How it is fixed

Fix method: Guidance or infrastructure patch

To establish the recommended state via configuration profiles, set the following Settings Catalog path to Enabled: 69632 for each application listed. Administrative Templates\MS Security Guide\Restrict legacy JScript execution for Office

Properties

Operating systems: Any
Tags: intune-officeintuneregistry
Reference: CIS Microsoft Intune for Office Benchmark v1.1.0 - 1.1.1.2 Ensure 'Restrict legacy JScript execution for Office' is set to 'Enabled'

Check this host

Run this on a machine you are allowed to audit. The scan is read-only.

shell

tmaegis scan --target intune-office