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POIs it possible to perform an CSRF attack on WCF service with webHttpBinding?
 

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  1. POIs it possible to perform an CSRF attack on WCF service with webHttpBinding?
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    <p>We are using WCF service with <code>webHttpBinding</code> binding to expose endpoint to clients. Service is hosted by IIS (.svc). Client is JavaScript generated automatically using <code>enableWebScript</code> behavior. All methods are using POST.</p> <p>Is it possible to make an CSRF attack to this service?</p> <p>I considered the following options:</p> <ul> <li>AJAX - not possible, because cross site requests are not allowed (I am assuming that our site isn't prone to XSS)</li> <li>HTML Form submit - not possible, because service requires certain HTTP headers which can't be set using HTML form</li> </ul> <p>Is there any other option? Flash, Silverlight, web sockets or something else?</p> <p>Valid request looks like this:</p> <pre><code>POST http://site/Service.svc/ServiceMethod HTTP/1.1 Host: site User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:12.0) Gecko/20100101 Firefox/12.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: cs,en-us;q=0.8,en;q=0.5,pl;q=0.3 Accept-Encoding: gzip, deflate Connection: keep-alive X-Requested-With: XMLHttpRequest Content-Type: application/json; charset=utf-8 Referer: http://site/ Content-Length: 33 Cookie: cookies, session id, etc. Pragma: no-cache Cache-Control: no-cache {"param1":11,"param2":"123"} </code></pre> <p>To be clear: I am trying to secure my service. Not perform an attack. I am considering adding an "authentication token" to every call, but first I would like to know if it is worth the effort.</p>
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