Re: AW: AW: security-basics Digest 18 Jun 2003 22:09:15 -0000 Issue 6 18

[SMiller () unimin com]

To ask a related, equally uninformed question:  If packets are diverted
through a sniffing host, will the sniffer address be enumerated on
traceroutes from either the source or the destination host to its
counterpart, or are there techniques to mask this?   Thanks.

-Scott




                                                                                                                        
         
                      Meidinger Christopher                                                                             
         
                      <christopher.meidinger@        To:       "'David Wallraff'" <wall0448 () ece umn edu>             
            
                      badenIT.de>                    cc:       "Security-Basics@Securityfocus. Com (E-Mail)"            
         
                                                      <security-basics () securityfocus com>                            
            
                      06/26/2003 05:09 AM            Subject:  AW: AW: security-basics Digest 18 Jun 2003 22:09:15 
-0000 Issue 6 
                                                      18                                                                
         
                                                                                                                        
         



...NOW, you ask yourself how can i sniff on a switched network if all i get
is
stuff for me?

The answer is, you have to lie to the other machines telling them that you
are either their gateway, or that you are the machines that they want to
talk to. The technical details are out of the scope of this paper, but you
essentially get messages destined for other IP addresses delivered to your
MAC address and then send them yourself to the the real MAC address that
belongs to dst host after keeping a copy of the packet for yourself. This
takes a certain amount of skill (though not that much with automated tools,
see below) to do, but it is not beyond a novice.
...
Chris Meidinger
Tullastrasse 70
79108 Freiburg








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