Rights managed Office Open XML files must be protected.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-228560	DTOO187	SV-228560r508020_rule		Medium

Description
When Information Rights Management (IRM) is used to restrict access to an Office Open XML document, any metadata associated with the document is not encrypted. This configuration could allow potentially sensitive information such as the document author and hyperlink references to be exposed to unauthorized individuals.

STIG	Date
Microsoft Office System 2013 Security Technical Implementation Guide	2020-09-25

Details

Check Text ( C-30793r498958_chk )
Verify the policy value for User Configuration >> Administrative Templates >> Microsoft Office 2013 >> Security Settings "Protect document metadata for rights managed Office Open XML Files" is set to "Enabled". Use the Windows Registry Editor to navigate to the following HKCU\Software\Policies\Microsoft\Office\15.0\common\security If the value 'DRMEncryptProperty' is REG_DWORD = 1, this is not a finding.

Check Text ( C-30793r498958_chk )

Verify the policy value for User Configuration >> Administrative Templates >> Microsoft Office 2013 >> Security Settings "Protect document metadata for rights managed Office Open XML Files" is set to "Enabled".

Use the Windows Registry Editor to navigate to the following HKCU\Software\Policies\Microsoft\Office\15.0\common\security

If the value 'DRMEncryptProperty' is REG_DWORD = 1, this is not a finding.

Fix Text (F-30778r498959_fix)
Set the policy value for User Configuration -> Administrative Templates -> Microsoft Office 2013 -> Security Settings "Protect document metadata for rights managed Office Open XML Files" to "Enabled".