full-disclosure - Microsoft Windows and *nix Telnet Port Number Argument Obfuscation

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Message-ID: <20050611232329.A14381@evita.devdas.geek>
Date: Sat Jun 11 18:53:54 2005
From: devdas at dvb.homelinux.org (Devdas Bhagat)
Subject: Microsoft Windows and *nix Telnet Port Number
	Argument Obfuscation

On 09/06/05 09:58 -0400, Kristian Hermansen wrote:
> On Wed, 2005-06-08 at 15:04 +1200, Nick FitzGerald wrote:
> > This has been known since Adam was a cowboy.
> 
> Although I don't believe that your claim is unlikely, it would have been
> nice to post a link to the original discovery to back it up.  Everyone
> that I have showed this to, personally, has not seen it before.  And,

Ask any C programmer what happens to integers that get incremented to
values greater than the maximum size they can contain. This wrapping
around of integers is known for a few years. You may also want to
understand the effect of passing a leading 0 in the field, particularly
when it comes to IP address obfuscation.

I hope this helps.

Devdas Bhagat