Date: Thu, 2 Nov 2000 11:32:47 -0800 From: "David O'Brien" <obrien@freebsd.org> To: Lauri Laupmaa <mauri@aripaev.ee> Cc: "'stable@freebsd.org'" <stable@freebsd.org> Subject: Re: TCP sequence prediction on freebsd Message-ID: <20001102113247.A13873@dragon.nuxi.com> In-Reply-To: <8E67E032AD23D4118F740050042F21F76F@lant.mbp.ee>; from mauri@aripaev.ee on Thu, Nov 02, 2000 at 02:12:05PM %2B0200 References: <8E67E032AD23D4118F740050042F21F76F@lant.mbp.ee>
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On Thu, Nov 02, 2000 at 02:12:05PM +0200, Lauri Laupmaa wrote:
> nmap reports something like:
> > TCP Sequence Prediction: Class=random positive increments
> > Difficulty=85682 (Worthy challenge)
>
> is this tcp sequence prediction really an security issue ?
**YES** Do a search for the Mitnick attack on Tsutomu Shimomura. It was
possible because of the ability to predict the TCP sequence numbers.
--
-- David (obrien@FreeBSD.org)
GNU is Not Unix / Linux Is Not UniX
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