Messaging hosts that are used must be installed with administrative privileges.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-235762	EDGE-00-000049	SV-235762r626543_rule		Medium

Description
If the policy is set to "enabled" or is unset, Microsoft Edge can use native messaging hosts installed at the user level. If the policy is set to "disabled", Microsoft Edge can only use these hosts if they are installed at the system level.

STIG	Date
Microsoft Edge Security Technical Implementation Guide	2021-02-16

Details

Check Text ( C-38981r626542_chk )
The policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Native Messaging/Allow user-level native messaging hosts (installed without admin permissions)" must be set to "disabled". Use the Windows Registry Editor to navigate to the following key: HKLM\SOFTWARE\Policies\Microsoft\Edge If the value for "NativeMessagingUserLevelHosts" is not set to "REG_DWORD = 0", this is a finding.

Check Text ( C-38981r626542_chk )

The policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Native Messaging/Allow user-level native messaging hosts (installed without admin permissions)" must be set to "disabled".

Use the Windows Registry Editor to navigate to the following key:
HKLM\SOFTWARE\Policies\Microsoft\Edge

If the value for "NativeMessagingUserLevelHosts" is not set to "REG_DWORD = 0", this is a finding.

Fix Text (F-38944r626541_fix)
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Native Messaging/Allow user-level native messaging hosts (installed without admin permissions)" to "disabled".