Excel attachments opened from Outlook must be in Protected View.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-26617	DTOO293	SV-53837r1_rule		Medium

Description
This policy setting allows for determining whether Excel files in Outlook attachments open in Protected View. If enabling this policy setting, Outlook attachments do not open in Protected View. If disabling or not configuring this policy setting, Outlook attachments open in Protected View.

STIG	Date
Microsoft Excel 2013 STIG	2018-04-03

Details

Check Text ( C-47893r2_chk )
The policy value for User Configuration -> Administrative Templates -> Microsoft Excel 2013 -> Excel Options -> Security -> Trust Center -> Protected View Turn off Protected View for attachments opened from Outlook" must be set to Disabled". Procedure: Use the Windows Registry Editor to navigate to the following key: HKCU\Software\Policies\Microsoft\Office\15.0\Excel\security\protectedview Criteria: If the value DisableAttachmentsInPV is REG_DWORD = 0, this is not a finding.

Check Text ( C-47893r2_chk )

The policy value for User Configuration -> Administrative Templates -> Microsoft Excel 2013 -> Excel Options -> Security -> Trust Center -> Protected View Turn off Protected View for attachments opened from Outlook" must be set to Disabled".

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

HKCU\Software\Policies\Microsoft\Office\15.0\Excel\security\protectedview

Criteria: If the value DisableAttachmentsInPV is REG_DWORD = 0, this is not a finding.

Fix Text (F-46740r1_fix)
Set the policy value for User Configuration -> Administrative Templates -> Microsoft Excel 2013 -> Excel Options -> Security -> Trust Center -> Protected View "Turn off Protected View for attachments opened from Outlook" to "Disabled".