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Author Topic: Web Services Traffic  (Read 2607 times)
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T_Bone
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« on: October 10, 2011, 02:10:32 PM »

Hi

Ok, so how can I intercept the initial traffic between a thick client app and end point which uses web services to transfer the data.  The connection is over SSL, however I need a way to be able to view the traffic being sent from the client before on my local machine just before it is encrypted. I have tried configuring stunnel to proxy the connection over https and then configure the app to talk to the localhost and use wireshark to view the traffic, however I cannot get this to work! Any other ideas please?

Thanks
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cd1zz
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« Reply #1 on: October 10, 2011, 02:41:31 PM »

Check out Fiddler

http://www.fiddler2.com/fiddler2/
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T_Bone
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« Reply #2 on: October 10, 2011, 02:54:59 PM »

Thanks, I have come across fiddler before. Would it act in a different manner to say burp though as I am unable to view the traffic via Burp in this way aswell. Ideally i would like to see what calls the app makes to the web service, take those requests and replay them using burp repeater to try and manipulate the data?
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cd1zz
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« Reply #3 on: October 10, 2011, 03:08:07 PM »

Actually, no. I'm pretty sure both of those will decrypt ssl on the fly for you.

I misread what your original post was. Why dont you just use Wireshark to do the decryption for you?

There's actually a nice write up on a Citrix KB http://support.citrix.com/article/CTX116557
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T_Bone
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« Reply #4 on: October 10, 2011, 03:28:34 PM »

Nice Smiley

However I don't have access to the server's private key so wouldn't be able to decrypt the traffic Sad. Its annoying as I know there must be a way to intercept and view the traffic as you can with burp, fiddler, webscarab etc but instead with a thick client using HTTPS as opposed to a web app front end Sad
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hayabusa
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« Reply #5 on: October 10, 2011, 03:29:32 PM »

Your other option would be to use Ettercap or sslsnoop on another machine, to do man-in-the-middle so you can decrypt the traffic as it crosses the wire (and passes through your 'middleman' machine.)

Edit - although, if your app is configured with a locally-stored certificate, this won't help.  But if the app pulls the cert on the fly, from the remote box, it might still fly...  I've done a few local apps, which connect ssl over https, and managed some creative sniffing mitm sessions, this way.
« Last Edit: October 10, 2011, 03:32:45 PM by hayabusa » Logged

~ hayabusa ~ 

"All men can see these tactics whereby I conquer, but what none can see is the strategy out of which victory is evolved." - Sun Tzu, 'The Art of War'


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