Office must be configured to not allow read with browsers.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-17583	DTOO200 - Office System	SV-33459r1_rule		Medium

Description
The Windows Rights Management Add-on for Internet Explorer provides a way for users who do not use the 2010 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. This configuration increases the size of rights-managed files, in some cases significantly.

Description

The Windows Rights Management Add-on for Internet Explorer provides a way for users who do not use the 2010 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. This configuration increases the size of rights-managed files, in some cases significantly.

STIG	Date
Microsoft Office System 2010 STIG	2018-04-04

Details

Check Text ( C-33942r1_chk )
The policy value for User Configuration -> Administrative Templates -> Microsoft Office 2010 -> Manage Restricted Permissions “Allow users with earlier versions of Office to read with browsers” must be set to “Disabled”. Procedure: Use the Windows Registry Editor to navigate to the following key: HKCU\Software\Policies\Microsoft\Office\14.0\common\drm Criteria: If the value IncludeHTML is REG_DWORD = 0, this is not a finding.

Check Text ( C-33942r1_chk )

The policy value for User Configuration -> Administrative Templates -> Microsoft Office 2010 -> Manage Restricted Permissions “Allow users with earlier versions of Office to read with browsers” must be set to “Disabled”.

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

HKCU\Software\Policies\Microsoft\Office\14.0\common\drm

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

Fix Text (F-29631r1_fix)
Set the policy value for User Configuration -> Administrative Templates -> Microsoft Office 2010 -> Manage Restricted Permissions “Allow users with earlier versions of Office to read with browsers” to “Disabled”.