Exploit for GWT-RPC

I just read this:
http://www.allinfosec.com/2011/07/27/webapps-0day-ca-arcserve-d2d-r15-gwt-rpc-multiple-vulnerabilities/

I'm far from being an expert in security stuff, so my question is if
it's also an app-server specific problem that makes this possible
(Microsoft Windows Server 2003 r2 sp2) or if it does not matter on
which server it runs?

What can one do against this?

Regards
Alex

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