Disable UI extending from documents and templates must be disallowed.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-26625	DTOO305 - Excel	SV-33809r1_rule	ECSC-1	Medium

Description
Office 2010 allows developers to extend the UI with customization code that is included in a document or template. If the customization code is written by an inexperienced or malicious developer, it could limit the accessibility or availability of important application commands. Commands could also be added to launch macros containing malicious code. Office applications load any UI customization code included with a document or template when opening it.

Description

Office 2010 allows developers to extend the UI with customization code that is included in a document or template. If the customization code is written by an inexperienced or malicious developer, it could limit the accessibility or availability of important application commands. Commands could also be added to launch macros containing malicious code. Office applications load any UI customization code included with a document or template when opening it.

STIG	Date
Microsoft Excel 2010	2011-09-29

Details

Check Text ( C-34183r1_chk )
The policy value for User Configuration -> Administrative Templates -> Microsoft Office 2010 -> Global Options -> Customize “Disable UI extending from documents and templates” must be “Enabled" and "Disallow in Excel" selected. Procedure: Use the Windows Registry Editor to navigate to the following key: HKCU\Software\Policies\Microsoft\Office\14.0\common\toolbars\excel Criteria: If the value NoExtensibilityCustomizationFromDocument is REG_DWORD = 1, this is not a finding.

Check Text ( C-34183r1_chk )

The policy value for User Configuration -> Administrative Templates -> Microsoft Office 2010 -> Global Options -> Customize “Disable UI extending from documents and templates” must be “Enabled" and "Disallow in Excel" selected.

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

HKCU\Software\Policies\Microsoft\Office\14.0\common\toolbars\excel

Criteria: If the value NoExtensibilityCustomizationFromDocument is REG_DWORD = 1, this is not a finding.

Fix Text (F-29872r1_fix)
Set the policy value for User Configuration -> Administrative Templates -> Microsoft Office 2010 -> Global Options -> Customize “Disable UI extending from documents and templates” to “Enabled" and select "Disallow in Excel".