Bugtraq mailing list archives
Re: ICMP spoofed source tunneling
From: Tim Newsham <newsham () lava net>
Date: Wed, 22 Sep 2004 10:06:40 -1000 (HST)
On Tue, Sep 21, 2004 at 08:55:04PM +0400, Max Tulyev wrote:Let's imagine in Net a hacker having his source server(S), destination server(D), and a ip-capable device - victim(V). S sends to V spoofed ICMP echo request packet containing IP source address of D, and the data in Payload. When V receiving that packet, it sends ICMP echo-reply packet to D, AND FORWARDS TO D ALL DATA IN PAYLOAD!This could also be used by peer-to-peer networks to achieve sender anonymity. (Of course you could also directly send UDP packets with forged source addresses...)
How does this give anonymity? When sending to the server, I must use the servers address as a source address. When the server replies to me, it must use my address as a source address. Maybe the two addresses dont appear in the same packet at the same time, but they're there. This might fool a few people when used a few times, but it will hardly fool everyone when it is in widespread use. Tim N.
Current thread:
- ICMP spoofed source tunneling Max Tulyev (Sep 21)
- Re: ICMP spoofed source tunneling fenfire (Sep 22)
- Re: ICMP spoofed source tunneling Tim Newsham (Sep 22)
- Re: ICMP spoofed source tunneling fenfire (Sep 23)
- Re: ICMP spoofed source tunneling Calum (Sep 28)
- Re: ICMP spoofed source tunneling Tim Newsham (Sep 22)
- Re: ICMP spoofed source tunneling sin (Sep 23)
- <Possible follow-ups>
- Re: ICMP spoofed source tunneling Dave Paris (Sep 23)
- Re: ICMP spoofed source tunneling raiblehugo (Sep 25)
- Re: ICMP spoofed source tunneling fenfire (Sep 22)