Title

Rights managed Office Open XML files must be protected. (Cat II impact)

Discussion

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.

Check Content

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

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".

Additional Identifiers

Rule ID: SV-228560r508020_rule

Vulnerability ID: V-228560

Group Title: SRG-APP-000429

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.