Title

Email with InfoPath forms must be configured to show UI to recipients. (Cat II impact)

Discussion

Malicious users could send InfoPath email forms with embedded web beacons that can be used to track when recipients open the form and provide confirmation that recipients' email addresses are valid. Additional information gathered by the form or information entered by users could also be sent to an external server and leave the users vulnerable to additional attacks. By default, InfoPath users are only warned of a beaconing threat if the form originates from the Internet.

Check Content

The policy value for User Configuration -> Administrative Templates -> Microsoft InfoPath 2013 -> Miscellaneous "Email Forms Beaconing UI" must be set to "Enabled (Always show UI)". Procedure: Use the Windows Registry Editor to navigate to the following key: HKCU\Software\Policies\Microsoft\Office\15.0\InfoPath\security Criteria: If the value EmailFormsBeaconingUI is REG_DWORD = 1, this is not a finding.

Fix Text

Set the policy value for User Configuration -> Administrative Templates -> Microsoft InfoPath 2013 -> Miscellaneous "Email Forms Beaconing UI" to "Enabled (Always show UI)".

Additional Identifiers

Rule ID: SV-53384r1_rule

Vulnerability ID: V-17611

Group Title: DTOO176 - Email forms beaconing UI

Expert Comments

CCIs tied to check.

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