Office must be configured to not allow read with browsers.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-17583	DTOO200	SV-52749r2_rule		Medium

Description
The Windows Rights Management Add-on for Internet Explorer provides a way for users who do not use the 2013 Office release to view, but not alter, files with restricted permissions. By default, IRM-enabled files are saved in a format that cannot be viewed by using the Windows Rights Management Add-on. If this setting is enabled, an embedded rights-managed HTML version of the content is saved with each IRM-enabled file, which can be viewed in Internet Explorer using the add-on, representing the risk of documents being read by those without the rights and not intended to have access to the document.

Description

The Windows Rights Management Add-on for Internet Explorer provides a way for users who do not use the 2013 Office release to view, but not alter, files with restricted permissions. By default, IRM-enabled files are saved in a format that cannot be viewed by using the Windows Rights Management Add-on. If this setting is enabled, an embedded rights-managed HTML version of the content is saved with each IRM-enabled file, which can be viewed in Internet Explorer using the add-on, representing the risk of documents being read by those without the rights and not intended to have access to the document.

STIG	Date
Microsoft Office System 2013 STIG	2018-09-05

Details

Check Text ( C-47078r4_chk )
Verify the policy value for User Configuration >> Administrative Templates >> Microsoft Office 2013 >> Manage Restricted Permissions "Allow users with earlier versions of Office to read with browsers" is set to "Disabled". Use the Windows Registry Editor to navigate to the following hive: HKEY_Users For every users profile hive under HKEY_Users, navigate to the following key: \Software\Policies\Microsoft\Office\15.0\common\drm If the value “IncludeHTML” is REG_DWORD = 0, this is not a finding.

Check Text ( C-47078r4_chk )

Verify the policy value for User Configuration >> Administrative Templates >> Microsoft Office 2013 >> Manage Restricted Permissions "Allow users with earlier versions of Office to read with browsers" is set to "Disabled".

Use the Windows Registry Editor to navigate to the following hive:
HKEY_Users

For every users profile hive under HKEY_Users, navigate to the following key:
\Software\Policies\Microsoft\Office\15.0\common\drm

If the value “IncludeHTML” is REG_DWORD = 0, this is not a finding.

Fix Text (F-45675r1_fix)
Set the policy value for User Configuration -> Administrative Templates -> Microsoft Office 2013 -> Manage Restricted Permissions "Allow users with earlier versions of Office to read with browsers" to "Disabled".