Someone with experience in CDP / STP attacks?

[Richard Miles <richard.k.miles () googlemail com>]

Hi

I appreciate any feedback from people with background in CDP and SPT attacks...

I was looking at the Yersinia man-page
(http://linux.die.net/man/8/yersinia) and there is a example using
option "-interface ethX", however this option do not exist at last
version of yersinia. How I can force yersinia to use my interface eth3?

I would appreciate a lot if you could give me some hints...

I have a enviroment a bit different. I'm in a network with near 5
VLANs, I'm isolated in one without any connection, however I want to
jump to the others. Yes, I'm authorized. But you can imagine what
happen if I DoS the network, ahn?

My VLAN is not vulnerable to ARP Poison, also if it was, it would not
help me, since our connections from this VLAN do not go abroad.

Also, the switch port is configured to prevent trunk negotiating and
VLAN hopping. We have not VOIP phones.

What is the great. I executed yersinia and I can see some CDP and STP
in the network, so it give me a light in the end of the way...

By what I did read, the CDP are coming from the switch and I think it
will not be useful to hope to other VLANs, right? I mean - ALA
voip-hopper (yes, it do not work in my case). Maybe there is other
trick using Yersinia to bypass this restrictions using this CDP
packets?

So, my ball number 7 should be the STP.

What Yersinia say about the STP packets it capture is:

My STP captured basic say:

Source Mac: <MAC>
Dest Mac: <MAC>
Id: 0000
Ver: 00 STP
Type: 00 Conf STP
Flags: 00 NO FLAGS
RootId: <The Numer>
BridgeId: <The Number>
Port: <Port Number>
Age: 0000
Max: 0012
Hello: 0002

Any guess on how to use it to break into the other VLANs?

I mean, when you use SPT attack, you MITM only the VLAN where you are
(like in a ARP Poison)? Or you are able to MITM all VLANs in the
switch?

Any suggestion of attack via command-line or ncurses inferface for my
case? Please, no DOS, my goal is be able to jump to the other VLANs OR
mitm the traffic for the other VLANs.

I did read all documents from Yersinia, the README and the Phrack
document, but it couldn't clarify this doubts.

Thanks so much.