netdev - Re: [PATCH net-next 0/8] tou: Transports over UDP

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Date:	Wed, 22 Jun 2016 15:23:07 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	hkchu@...gle.com
Cc:	tom@...bertland.com, netdev@...r.kernel.org, kernel-team@...com
Subject: Re: [PATCH net-next 0/8] tou: Transports over UDP - part I

From: Jerry Chu <hkchu@...gle.com>
Date: Tue, 21 Jun 2016 20:42:19 -0700

> I don't believe TOU will lead to a proliferation of TCP
> implementations in the userland - getting a solid TCP implementation
> is hard.

The fear isn't doing legitimate things.

It's making TCP stacks that do evil stuff on purpose.

Also, making proprietary TCP stacks that override the kernel one.

And finally, here's the best part, all of the above can be done as a
new, huge, potential attack vector for hackers.

All they need is to get this evil TCP stack working once, then it's
in every root kit out there.  If you can take over the TCP stack of
a several hundred thousand machine strong botnet, imagine what you
could do.

And the TOU facility... facilitates this.