Re: VLAN Issue

From: Damieon Stark (visigothat_private)
Date: Mon Jun 11 2001 - 09:05:30 PDT

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    As was once said by the wise hellNbak, on Sun, Jun 10, 2001 at 12:59:09AM -0400:
    > Hi everyone.
    > 
    > I am looking for an actual exploit to verify the VLAN hopping issue that
    > was reported back in 1999.  I have found a bunch of docs and a few email
    > threads on it but it seems that no one has generated a working exploit.
    
        Just to double check, the network you are working with is using
    vlan trunking on multiple switches correct?  I have commonly met the
    misconception about that being an issue for VLAN's on just one switch...
    
    	I do recall writing a small utility (which I can't find now of
    course ;) which did confirm in our lab that it was possible to inject
    vlan hopping frames.  I couldn't seem to find any code online either, but
    just wanted to pipe up and let you know it HAD for SURE been done...
    
    
    > I am in the unfortunate situation where I have a client who is refusing to
    > believe the documentation and actually wants a live demo.  Why isn't
    > reading an RFC and pointing out flaws enough for people anymore??
    
    	Once again the old axiom: "This job would be perfect if it weren't
    for the damn customers." ;)
    
    Damieon Stark, CCSE
    Unix/Network security specialist
    <plug>
    currently seeking employment
    </plug>
    
    
    



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