>> Can you elaborate on this?  

Sure, NP!

The only check the gaming registration portal does is to make sure the MAC it 
is given has the correct OUI, if it does the portal registers the device under 
the user ID of the person who fills out the form.

Let's say that Bob has an Xbox, he uses the portal page to register his Xbox 
and is now happily playing CoD:MW instead of chatting up the ladies on campus. 
Bob's nemesis, Gary, decides that he wants to mess with Bob. So, Gary finds 
Bob's Xbox MAC and goes to the portal page and fills out the form using Bob's 
MAC. 

According to my system Bob's Xbox now belongs to Gary. 

But this is where I get a bit confused, because while they are swapping names 
in my records, nothing else is happening.  They are staying on the gaming vlan. 
I don't see any real danger other than 2 idiots getting into some kind of 
registration war.

However, for me there is another problem.  We are considering removing the OUI 
check from the portal and using it as a general registration page for devices 
that do not have a traditional browser. Devices like smart TVs, BluRay players, 
etc..  With this  Our intrepid user Gary could, if he was crafty enough, find 
MY MAC.  Now, as you can see, I am The Godfather of Bandwidth.  My stations 
have unfettered access to the network (what can I say, sometimes it's good to 
be me ... sometimes).  Gary in what he considers to be a stroke of genius 
decides to re-register my MAC using the portal.  Now my laptop is on the gaming 
vlan and my access is severely hampered.  In the intervening 3 1/2 minutes it 
takes me to figure out the issue and fix it (and blacklist Gary) Gary could 
have done the same to a dozen more people since I have been forbidden from 
setting a limit on the number of devices a person can have registered.

Anyway, there is my concern. Ideally, a simple check to make sure the device is 
not already registered could solve all of this. And frustrate Garys everywhere.


Jake Sallee
Godfather of Bandwidth
System Engineer
University of Mary Hardin-Baylor
900 College St.
Belton TX. 76513
Fone: 254-295-4658
Phax: 254-295-4221
HTTP://WWW.UMHB.EDU

-----Original Message-----
From: Jason Frisvold [mailto:[email protected]] 
Sent: Wednesday, August 14, 2013 2:34 PM
To: [email protected]
Subject: Re: [PacketFence-users] Potential Concern in Gaming Registration Portal

Sallee, Stephen (Jake) wrote:
> Hello!
> 
> The gaming portal does not do any checking to see if the device you 
> give it is in a state that need to be registered.
> 
> The net effect of this is that a user can effectively hijack another 
> user's device.

Can you elaborate on this?  I'm not sure what you mean by "in a state that 
needs registered" ..  Do you mean that someone can effectively hijack a MAC 
address and re-register it as something else?

> Although ... I'm not sure what a user could gain from doing this ... but 
> anyway , there it is.
> 
> Jake Sallee


--
---------------------------
Jason 'XenoPhage' Frisvold
[email protected]
---------------------------

"Any sufficiently advanced magic is indistinguishable from technology.\"
- Niven's Inverse of Clarke's Third Law

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