<<< Date Index >>>     <<< Thread Index >>>

Various router DoS



It appears that various routers are prone to an IRC-only DoS attack. 
Particularly Netgear and Linksys routers have been shown vulnerable.

If a client behind one of the vulnerable routers connects to an IRC server on 
port 6667 (and only 6667, does not DoS with other ports) and a user posts the 
following string in either a channel, private message, ctcp, notice, etc.. the 
router will drop the connection. The string is as follows:

DCC SEND anylongrandomstringhere

It is most commonly being seen as 

DCC SEND "string" 0 0 0 

but that appears to be unneccessary. The string does need to be 15+ chars in 
length.

Further, it appears the routers that are vulnerable to this are running vxworks 
as their embedded OS. Older linux Linksys routers appear to be immune.