Trust Bar Notifications for unsigned applications must be disabled.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-40738	DTOO131	SV-52796r1_rule		Medium

Description
If an application is configured to require all add-ins to be signed by a trusted publisher, any unsigned add-ins the application loads will be disabled and the application will display the Trust Bar at the top of the active window. The Trust Bar contains a message informing users about the unsigned add-in. If a user is allowed to make the determination to allow an unsigned add-in, it increases the risk of malicious code being introduced onto the user's computer or the network.

Description

If an application is configured to require all add-ins to be signed by a trusted publisher, any unsigned add-ins the application loads will be disabled and the application will display the Trust Bar at the top of the active window. The Trust Bar contains a message informing users about the unsigned add-in. If a user is allowed to make the determination to allow an unsigned add-in, it increases the risk of malicious code being introduced onto the user's computer or the network.

STIG	Date
Microsoft Visio 2013 STIG	2018-04-04

Details

Check Text ( C-47125r1_chk )
Verify the policy value for User Configuration -> Administrative Templates -> Microsoft Visio 2013 -> Visio Options -> Security -> Trust Center -> "Disable Trust Bar Notification for unsigned application add-ins and block them" is set to "Enabled". Procedure: Use the Windows Registry Editor to navigate to the following key: HKCU\software\policies\Microsoft\office\15.0\Visio\security Criteria: If the value notbpromptunsignedaddin is REG_DWORD = 1, this is not a finding.

Check Text ( C-47125r1_chk )

Verify the policy value for User Configuration -> Administrative Templates -> Microsoft Visio 2013 -> Visio Options -> Security -> Trust Center -> "Disable Trust Bar Notification for unsigned application add-ins and block them" is set to "Enabled".

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

HKCU\software\policies\Microsoft\office\15.0\Visio\security

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

Fix Text (F-45722r1_fix)
Set the policy value for User Configuration -> Administrative Templates -> Microsoft Visio 2013 -> Visio Options -> Security -> Trust Center -> "Disable Trust Bar Notification for unsigned application add-ins and block them" to "Enabled".