Add-ins to Office applications must be signed by a Trusted Publisher.

From Microsoft Project 2013 STIG

Part of DTOO127 - Add-ins are signed by Trusted Publisher

Associated with: CCI-000366

SV-53226r1_rule Add-ins to Office applications must be signed by a Trusted Publisher.

Vulnerability discussion

Office 2013 applications do not check the digital signature on application add-ins before opening them. Disabling or not configuring this setting may allow an application to load a dangerous add-in. As a result, malicious code could become active on user computers or the network.

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Fix text

Set the policy User Configuration -> Administrative Templates -> Microsoft Project 2013 -> Project Options -> Security -> Trust Center -> "Require that application add-ins are signed by Trusted Publisher" to "Enabled".

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