File Explorer shell protocol must run in protected mode.

From Windows 8/8.1 Security Technical Implementation Guide

Part of Windows Explorer – Shell Protocol Protected Mode

Associated with: CCI-000366

SV-48230r1_rule File Explorer shell protocol must run in protected mode.

Vulnerability discussion

The shell protocol will limit the set of folders applications can open when run in protected mode. Restricting files an application can open, to a limited set of folders, increases the security of Windows.

Check content

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Subkey: \Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\ Value Name: PreXPSP2ShellProtocolBehavior Type: REG_DWORD Value: 0

Fix text

Configure the policy value for Computer Configuration -> Administrative Templates -> Windows Components -> File Explorer -> "Turn off shell protocol protected mode" to "Disabled".

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