In reply to anonymous.

Hi,

As Stefano mentioned in the blog, a successful attack could make permanent modifications to customization objects. Reloading or upgrading to a fixed version of Cisco ASA Software will not help against a successful attack that has already happened. The steps highlighted above can be followed to verify if you have been compromised. If you cannot determine if the customization object has been modified, you should delete it. After upgrading, the fix prevents any modifications or redirections of these objects.

Hope this helps!

Omar