Title

File Explorer shell protocol must run in protected mode. (Cat II impact)

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".

Additional Identifiers

Rule ID: SV-48230r1_rule

Vulnerability ID: V-15683

Group Title: Windows Explorer – Shell Protocol Protected Mode

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.