Bugtraq mailing list archives
Re: udp packet storms
From: avalon () coombs anu edu au (Darren Reed)
Date: Sun, 30 Oct 1994 19:19:58 +1100 (EDT)
"In the previous message, Tim Newsham said..."There's at least one way to make a UDP packet storm. Not very hard to do: src address = 255.255.255.255 port 7 dst address = <some host> port 7 the port will be echoed by the inetd (echo port) back to the sender (255.255.255.255 port 7). Each machine with an inetd that has echo enabled will echo the packet back to the first machine. Broadcast addresses need not be used: src address = <some host> port 7 dst address = <some other host> port 7 I imagine the same can be done with talkd packets. UDP source addresses are easy to forge.That's interesting - it amounts to a feedback loop (in electrical or audio terminology). Is there a way to interrupt this sort of thing (short of killing inetd or the involved daemon) or rebooting (a drastic method of doing the same thing)? How would one prevent this without disabling the udp services?
Can't as they're interal to inetd. Get xinted and hack that to ignore responses from broadcast addresses (if it don't already).
Current thread:
- udp packet storms Tim Newsham (Oct 29)
- Re: udp packet storms Chris Ellwood (Oct 29)
- Re: udp packet storms Darren Reed (Oct 29)
- Re: udp packet storms Chris Ellwood (Oct 30)
- Re: udp packet storms Peter Wemm (Oct 30)
- Re: udp packet storms Perry E. Metzger (Oct 31)
- Re: udp packet storms Darren Reed (Oct 29)
- Re: udp packet storms Chris Ellwood (Oct 29)
- Re: udp packet storms Pat Myrto (Oct 29)
- Re: udp packet storms Darren Reed (Oct 30)
- Re: udp packet storms John Hawkinson (Oct 30)
- Re: udp packet storms Mark A. Fullmer (Oct 30)
- Re: udp packet storms Darren Reed (Oct 30)
- Re: udp packet storms Charles Howes (Oct 30)
- Re: udp packet storms Darren Reed (Oct 30)
- Re: udp packet storms Wietse Venema (Oct 30)
- Re: udp packet storms Jas (Oct 30)
- Re: udp packet storms Perry E. Metzger (Oct 30)
- Re: udp packet storms Tim Newsham (Oct 30)
- Re: udp packet storms Darren Reed (Oct 31)
- Re: udp packet storms Perry E. Metzger (Oct 31)