nanog mailing list archives
Re: [nsp] known networks for broadcast ping attacks
From: Netstat Webmaster <feh () netstat net>
Date: Wed, 30 Jul 1997 16:57:34 -0400 (EDT)
On Wed, 30 Jul 1997, Systems Engineer wrote:
Actually people are making it seem that the entire MAE is sending you an echo. No one is mounting an attack from there, they are just making it look like it is coming from there.
Well thats not entirely true. In effect the victim is indeed being 'attacked' by MAE machines on that network. Look at it like this: evil.com -> generates packet with forged address as (victim.com(icmp_echo)) -> destination for spoofed packet (25 .255 broadcast addresses).
From here... all 25 network's broadcast address pass the icmp with the
forged address on to all machines using that network. Each machine then replies as: xxx.xxx.xxx.255 abused.net.com (echo_reply) -> victim.com abused2.net.com (echo_reply) -> victim.com yyy.yyy.yyy.255 abused3.othernet.com (echo_reply) -> victim.com abused4.othernet.com (echo_reply) -> victim.com [...etc...] Its a rather obnoxious attack, and its not exactly new. Though I do think that it will get much worse now that smurf.c has been written and is being passed around like candy. The real problem I see with this particular attack is that there is nothing short of blocking all ICMPs that 'victim.com' can do. At least not that I am aware of. Regards, Tripp webmaster@http://www.netstat.net
Current thread:
- Re: [nsp] known networks for broadcast ping attacks, (continued)
- Re: [nsp] known networks for broadcast ping attacks Netstat Webmaster (Jul 30)
- Message not available
- Re: [nsp] known networks for broadcast ping attacks Jay R. Ashworth (Jul 30)
- Re: [nsp] known networks for broadcast ping attacks Jordyn A. Buchanan (Jul 30)
- Message not available
- Re: [nsp] known networks for broadcast ping attacks Jay R. Ashworth (Jul 30)
- Re: [nsp] known networks for broadcast ping attacks Michael Shields (Jul 30)
- Re: [nsp] known networks for broadcast ping attacks Jon Lewis (Jul 30)
- Re: [nsp] known networks for broadcast ping attacks Joe Rhett (Jul 30)
- Message not available
- Re: [nsp] known networks for broadcast ping attacks Jay R. Ashworth (Jul 30)
- Re: [nsp] known networks for broadcast ping attacks Alex.Bligh (Jul 31)
- Re: [nsp] known networks for broadcast ping attacks Netstat Webmaster (Jul 30)
- Re: [nsp] known networks for broadcast ping attacks Systems Engineer (Jul 30)
- Re: [nsp] known networks for broadcast ping attacks root (Jul 30)
- Re: [nsp] known networks for broadcast ping attacks Systems Engineer (Jul 30)
- Re: [nsp] known networks for broadcast ping attacks root (Jul 30)
- Re: [nsp] known networks for broadcast ping attacks Systems Engineer (Jul 30)