[vox] Rant: the suckiness of http://www.sectoor.de/ and thier "tor blacklisting"

[Micah J. Cowan]

On Sun, Jul 10, 2005 at 12:59:57PM -0700, ME wrote:
> ME said:
> [chop]
> 
> I have been thinking about this a bit more and have some interesting
> thoughts on how this service can be used against people.
> 
> This service relies upon an rDNS lookup which, for the most part, happens
> over port 53 UDP.
> 
> As we know, UDP is a connectionless protocol.
> 
> Being a connectionless protocol, it is easier to forge UDP packets without
> a true "session" than it is to forge TCP packets with syn and ack numbers.
> 
> DNS Caching attacks have been known to exist for quite a while, and there
> are some methods to try to deal with them.
> 
> Find a target user that uses a service that subscribed to the tor system.
> 
> Understand what DNS their service uses, and attempt to poison their "toor
> blacklisting client" with 127.0.0.1 replies for your target user's IP
> address.

Seen on slashdot today:

http://it.slashdot.org/article.pl?sid=05/07/11/1210231&tid=172&tid=218

"Launching Anonymous Attacks Using the Tor Network"