Files downloaded from the Internet must be opened in Protected view in Word.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-223402	O365-WD-000003	SV-223402r508019_rule		Medium

Description
This policy setting allows you to determine if files downloaded from the Internet zone open in Protected View. If you enable this policy setting, files downloaded from the Internet zone do not open in Protected View. If you disable or do not configure this policy setting, files downloaded from the Internet zone open in Protected View.

STIG	Date
Microsoft Office 365 ProPlus Security Technical Implementation Guide	2020-09-11

Details

Check Text ( C-25075r442425_chk )
Verify the policy setting, User Configuration >> Administrative Templates >> Microsoft Word 2016 >> Word Options >> Security >> Trust Center >> Protected View >> Do not open files from the Internet zone in Protected View is set to "Disabled". Use the Windows Registry Editor to navigate to the following key: HKCU\software\policies\microsoft\office\16.0\word\security\protectedview If the value for disableinternetfilesinpv is REG_DWORD = 0, this is not a finding. If the value does not exist, this is not a finding. If the value is REG_DWORD = 1, this is a finding.

Check Text ( C-25075r442425_chk )

Verify the policy setting, User Configuration >> Administrative Templates >> Microsoft Word 2016 >> Word Options >> Security >> Trust Center >> Protected View >> Do not open files from the Internet zone in Protected View is set to "Disabled".

Use the Windows Registry Editor to navigate to the following key:

HKCU\software\policies\microsoft\office\16.0\word\security\protectedview

If the value for disableinternetfilesinpv is REG_DWORD = 0, this is not a finding. If the value does not exist, this is not a finding.

If the value is REG_DWORD = 1, this is a finding.

Fix Text (F-25063r442426_fix)
Set the policy setting, User Configuration >> Administrative Templates >> Microsoft Word 2016 >> Word Options >> Security >> Trust Center >> Protected View >> Do not open files from the Internet zone in Protected View to "Disabled".