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 people.

Check Content

The policy value for User Configuration -> Administrative Templates -> Microsoft Office 2010 -> Security Settings “Protect document metadata for rights managed Office Open XML Files” must be set to “Enabled”. Procedure: Use the Windows Registry Editor to navigate to the following key: HKCU\Software\Policies\Microsoft\Office\14.0\common\security Criteria: 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 2010 -> Security Settings “Protect document metadata for rights managed Office Open XML Files” to “Enabled”.

Additional Identifiers

Rule ID: SV-33468r1_rule

Vulnerability ID: V-17769

Group Title: DTOO187 - Protect metadata / rights managed docs

Expert Comments

CCIs tied to check.

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