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Network Security FullDisclosure
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Re: [Full-Disclosure] client - server

Subject: Re: [Full-Disclosure] client - server
Date: Mon, 28 Feb 2005 17:59:33 +0100
I have made all tests on that website : none revealing informations that can
recognize me. I mean: if mozilla would send its SERIAL NUMBER (if it exsts) that
is a way to identify my own copy of mozilla.



which informations can a server get about a client running M$ windows XP ?
I cannot access a website because i have been "banned" and I'd like to
understand how they recognize me for sure.

All sorts of stuff. Visit browserspy (http://gemal.dk/browserspy/) for a 
bunch of tests. Java is one excellent way to steal the goods (and many 
browserspy tests use that).

The 'short' answer is, however, probably a simple IP check.

I mean:
- a simple ip check doesn't work with dynamic addresses...
- cookies can be deleted
- computer name can be changed
- mac address can be changed (even I wasn't able to, because I have a usb dsl
modem and I cannot change its MAC working with regedit or using tools like 
smac )

MAC address? That's not visible past the DSLAM. As for dynamic 
addresses, have you kept track? I have (supposed) dynamic addresses at 
home and it's not changed in over a year.

You should dump the DSL modem and get a conventional ethernet one. Then 
change the MAC on your ethernet card at will (this will get you new 
addresses). There probably is a way to access the innerds of the USB one 
but you'd probably have to take it apart and locate the serial port.

~Mike.

Anything else ?
How the hell do they recognize me ?

Matteo Giannone




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_______________________________________________
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