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Re: [Full-disclosure] VLAN Hopping, myth or reality?
From: Mikael Abrahamsson (swmike
swm.pp.se)
Date: Tue Sep 20 2005 - 00:10:04 CDT
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On Mon, 19 Sep 2005, Yersinia Authors wrote:
> We haved tested this attack only against Cisco switches 29xx, so we
> would be pleased if we received notifications of working attacks in
> other Cisco modeles, or better, other vendors (which is almost
> impossible since DTP is Cisco proprietary, but, we've seen HP switches
> with CDP enabled ;) )
You will most likely be able to do this to any cisco switch that supports
DTP. What you're doing is using a misconfiguration, not really a
vulnerability. You're not vlan hopping, you're telling the switch that you
are a switch and that the interlink should be in trunk mode, and then the
other end will give you access to all vlans, if it's configured default
from factory.
--
Mikael Abrahamsson email: swmikeswm.pp.se
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