Re: [PATCH] fix small DoS on connect() (was Re: BUG: Unusual TCP Connect() results.)

On Sun, Jun 12, 2005 at 02:22:47PM +0200, Thomas Graf wrote:

quoted

Look at the first check inside th->ack in tcp_rcv_synsent_state_process.

Usually a continious flow of ACK+RST is used to prevent a connection
from being established, it's more reliable because even if you hit the
ISS+rcv_next window the connection attempt will still be reset.

Sure.  My point is that there are a hundred and one ways to attack
a TCP connection in a manner similar to the original method that
started this thread.  So fixes like this are pretty pointless.

Cheers,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} [off-list ref]
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt