The ability to run unsecure Office web add-ins and Catalogs must be disabled.

From Microsoft Office System 2016 Security Technical Implementation Guide

Associated with: CCI-000366

SV-85519r1_rule The ability to run unsecure Office web add-ins and Catalogs must be disabled.

Vulnerability discussion

This policy setting allows users to run unsecure web add-in, which are add-ins that have web page or catalog locations that are not SSL-secured (https://), and are not in users' Internet zones. If you enable this policy setting, users can run unsecure apps. To enable specific unsecure web add-ins, you must also configure the Trusted Web add-in Catalog policy settings to trust the catalogs that contains those Add-ins. If you disable or do not configure this policy setting, unsecure web add-ins are not allowed.

Check content

Verify the policy value for User Configuration -> Administrative Templates -> Microsoft Office 2016 -> Security Settings -> Trust Center -> Trusted Catalogs "Allow Unsecure web add-ins and Catalogs" is set to "Disabled". Procedure: Use the Windows Registry Editor to navigate to the following key: HKCU\software\policies\Microsoft\office\16.0\wef\trustedcatalogs Criteria: If the value requireserververification is REG_DWORD = 1, this is not a finding.

Fix text

Set the policy value for User Configuration -> Administrative Templates -> Microsoft Office 2016 -> Security Settings -> Trust Center -> Trusted Catalogs "Allow Unsecure web add-ins and Catalogs" to "Disabled".

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