Title

Disabling of email forms from the Full Trust Security Zone must be configured. (Cat II impact)

Discussion

InfoPath provides three security levels for form templates: Restricted, Domain, and Full Trust. The security levels determine whether a form template can access data on other domains, or access files and settings on your computer. Fully trusted forms have a Full Trust security level, and can access files and settings on users' computers. The form template for these forms must be digitally signed with a trusted root certificate, or installed on users' computers. By default, InfoPath can open email forms with full trust. If an attacker designs and sends a dangerous fully trusted email form, it could affect users' computers or give the attacker access to sensitive information.

Check Content

The policy value for User Configuration -> Administrative Templates -> Microsoft InfoPath 2013 -> InfoPath e-mail forms "Disable e-mail forms from the Full Trust security zone" must be set to "Enabled". 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 EnableFullTrustEmailForms is REG_DWORD = 0, this is not a finding.

Fix Text

Set the policy value for User Configuration -> Administrative Templates -> Microsoft InfoPath 2013 -> InfoPath e-mail forms "Disable e-mail forms from the Full Trust security zone" to "Enabled".

Additional Identifiers

Rule ID: SV-53383r1_rule

Vulnerability ID: V-17655

Group Title: DTOO173 - E-Mail forms from Full Trust Zone

Expert Comments

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