Object Model Prompt behavior for accessing User Property Formula must be configured.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-17570	DTOO254	SV-54001r1_rule	ECSC-1	Medium

Description
A custom form in Outlook could be used to gain access to sensitive address book data and potentially to change that data. By default, when a user tries to bind an address information field to a combination or formula custom field in a custom form, Outlook relies on the setting configured in the "Programmatic Access" section of the Trust Center. This setting determines whether Outlook will warn users about programmatic access attempts: * Only when antivirus software is out of date or not running (the default setting) * Every time * Not at all If the "Not at all" option is selected, Outlook will silently grant programmatic access to any program that requests it, which could allow a malicious program to gain access to sensitive information. Note: This described default functionality assumes that the "Outlook Security Mode" Group Policy setting to ensure that Outlook security settings are configured by Group Policy has not been followed. If Group Policy security settings are used for Outlook, the "Programmatic Access" section of the Trust Center is not used. In this situation, the default is to prompt users based on computer security, which is the equivalent of the "Only when antivirus software is out of date or not running" option in the Trust Center, and the user experience is not affected.

Description

A custom form in Outlook could be used to gain access to sensitive address book data and potentially to change that data. By default, when a user tries to bind an address information field to a combination or formula custom field in a custom form, Outlook relies on the setting configured in the "Programmatic Access" section of the Trust Center. This setting determines whether Outlook will warn users about programmatic access attempts: * Only when antivirus software is out of date or not running (the default setting) * Every time * Not at all If the "Not at all" option is selected, Outlook will silently grant programmatic access to any program that requests it, which could allow a malicious program to gain access to sensitive information. Note: This described default functionality assumes that the "Outlook Security Mode" Group Policy setting to ensure that Outlook security settings are configured by Group Policy has not been followed. If Group Policy security settings are used for Outlook, the "Programmatic Access" section of the Trust Center is not used. In this situation, the default is to prompt users based on computer security, which is the equivalent of the "Only when antivirus software is out of date or not running" option in the Trust Center, and the user experience is not affected.

STIG	Date
Microsoft Outlook 2013 STIG	2014-01-06

Details

Check Text ( C-47971r1_chk )
Verify the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2013 -> Security -> Security Form Settings -> Programmatic Security "Configure Outlook object model prompt When accessing the Formula property of a UserProperty object" is set to "Enabled (Automatically Deny)". Procedure: Use the Windows Registry Editor to navigate to the following key: HKCU\Software\Policies\Microsoft\Office\15.0\outlook\security Criteria: If the value PromptOOMFormulaAccess is REG_DWORD = 0, this is not a finding.

Check Text ( C-47971r1_chk )

Verify the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2013 -> Security -> Security Form Settings -> Programmatic Security "Configure Outlook object model prompt When accessing the Formula property of a UserProperty object" is set to "Enabled (Automatically Deny)".

Procedure: Use the Windows Registry Editor to navigate to the following key:

HKCU\Software\Policies\Microsoft\Office\15.0\outlook\security

Criteria: If the value PromptOOMFormulaAccess is REG_DWORD = 0, this is not a finding.

Fix Text (F-46890r1_fix)
Set the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2013 -> Security -> Security Form Settings -> Programmatic Security "Configure Outlook object model prompt When accessing the Formula property of a UserProperty object" to "Enabled (Automatically Deny)".