Vulnerability Development mailing list archives
Re: Hijack IP Address using cable modem
From: Patrick Maartense <patrick () MAARTENSE COM>
Date: Wed, 28 Mar 2001 22:56:59 +0200
x ARP request for 6.240.183.248 (46 bytes) from xxxxxxxxxxxxxx to ffffffffffff on eth0 x x ARP request for 6.240.183.249 (46 bytes) from xxxxxxxxxxxxxx to ffffffffffff on eth0 x x ARP request for 6.240.183.250 (46 bytes) from xxxxxxxxxxxxxx to ffffffffffff on eth0 x x ARP request for 6.240.183.251 (46 bytes) from xxxxxxxxxxxxxx to ffffffffffff on eth0 x x ARP request for 6.240.183.252 (46 bytes) from xxxxxxxxxxxxxx to ffffffffffff on eth0 x x ARP request for 6.240.183.253 (46 bytes) from xxxxxxxxxxxxxx to ffffffffffff on eth0 x x ARP request for 6.240.183.254 (46 bytes) from xxxxxxxxxxxxxx to ffffffffffff on eth0 x x ARP request for 1.95.202.249 (46 bytes) from xxxxxxxxxxxxxx to ffffffffffff on eth0 x x ARP request for 1.95.202.249 (46 bytes) from xxxxxxxxxxxxxx to ffffffffffff on eth0 x x ARP request for 1.95.202.249 (46 bytes) from xxxxxxxxxxxxxx to ffffffffffff on eth0 x x ARP request for 1.95.202.249 (46 bytes) from xxxxxxxxxxxxxx to ffffffffffff on eth0 x x ARP request for 1.95.202.249 (46 bytes) from xxxxxxxxxxxxxx to ffffffffffff on eth0 x x ARP request for 1.95.202.249 (46 bytes) from xxxxxxxxxxxxxx to ffffffffffff on eth0 x x ARP request for 1.95.202.249 (46 bytes) from xxxxxxxxxxxxxx to ffffffffffff on eth0 x I make a ping sweep here for network that is configured by the ISP I do that from a REMOTE network lets say www.micro-soft.com ( Just Kidding) since the ROUTER at the ISP does not know wher to find these adresses it makes an ARP request now whatch 1.95.202.249 on my box i have 1.95.202.173 as NORMAL address so i do ifconfig eth0:1 1.95.202.249 now again from www.micro-soft.com i do ping 1.95.202.249 then I see x ARP request for 1.95.202.249 (46 bytes) from 00d0xxxxxxxx to ffffffffffff on eth0 =============== My iface replys ARP reply from 1.95.202.249 (46 bytes) from xxxxxxxxxxxx to xxxxxxxxxxxxxx on eth0 x no i make route delete 0.0.0.0 route add 0.0.0.0 gw 1.95.202.1 and all trafic comming from there seems to come from 1.95.202.249 now i do telnet www.compaq.com 53 hackiti hack, clickiti click do my stuf aftwerwards do reboot my pc all back to normal next mornng guy from 1.95.202.249 wakes up next to Jim, just sentenced to another 10 years for raping his cellmate... catch my drift? Patrick Patterson wrote:
-----BEGIN PGP SIGNED MESSAGE----- I think I see where Patrick was coming from with this: Victim turns on his computer, and gets an IP address Cracker, while sniffing the Cable segment notices that IP adress foo is assigned to MAC bar Cracker changes his own MAC address to bar, and brings up IP address foo on this new MAC address (some Ethernet cards have overwritable MAC addresses) Since both Cracker and Victim have the same MAC, Cracker get's all packets for Victims computer, and is able to impersonate victim. This is just a slightly more sophisticated IP Address Spoofing attack.... and I don't think it will work...From what I know of Cablemodem networks, there are actually several parts.1: The cable network - the 'Modem' talks to the Cable Company terminal equipment and ensures that you are a valid subscriber. 2: The IP Network - the routers keep track of which IP and MAC, is on which Cable Modem - thus making this attack unlikely to succeed.... I haven't tested this, and might be horribly wrong, but I don't think so - this is one of those things that looks better in theory than in practice - Is anyone from @HOME or ATT around to confirm/deny what's I've written? On Wednesday 28 March 2001 09:09, Nick Summy wrote:Now I hardly know anything about this subject, so correct me If im wrong, but I have a few questions.<SNIP> - -- Patrick Patterson Tel: +1 514 485-0789 President, Chief Security Architect Fax: +1 514 485-4737 Carillon Information Security Inc. E-Mail: ppatterson () carillonis com - ----------------- The New Sound of Network Security ----------------- << http://www.carillonis.com >>
Current thread:
- Hijack IP Address using cable modem Patrick Maartense (Mar 28)
- Re: Hijack IP Address using cable modem Nick Summy (Mar 28)
- Re: Hijack IP Address using cable modem Patrick Patterson (Mar 28)
- Re: Hijack IP Address using cable modem cdowns (Mar 28)
- Re: Hijack IP Address using cable modem Larry W. Cashdollar (Mar 28)
- Re: Hijack IP Address using cable modem Bill Munger (Mar 29)
- Re: Hijack IP Address using cable modem Mathias Wegner (Mar 28)
- Re: Hijack IP Address using cable modem Dick Visser (Mar 28)
- Re: Hijack IP Address using cable modem Reb (Mar 29)
- Re: Hijack IP Address using cable modem Patrick Patterson (Mar 28)
- Re: Hijack IP Address using cable modem Patrick Maartense (Mar 28)
- Re: Hijack IP Address using cable modem Patrick Maartense (Mar 28)
- Re: Hijack IP Address using cable modem Nick Summy (Mar 29)
- Re: Hijack IP Address using cable modem David Laganière (Mar 29)
- Re: Hijack IP Address using cable modem Clayton Hoskinson (Mar 29)
- Re: Hijack IP Address using cable modem Nick Summy (Mar 28)
- Re: Hijack IP Address using cable modem moksha faced (Mar 29)
- <Possible follow-ups>
- Re: Hijack IP Address using cable modem Patrick Maartense (Mar 28)
- Re: Hijack IP Address using cable modem Williamson, Glenn (Mar 29)
- Re: Hijack IP Address using cable modem cdowns (Mar 29)