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Re: [Full-disclosure] Microsoft Windows and *nix Telnet Port Number Argument Obfuscation
- To: Full Disclosure <full-disclosure@xxxxxxxxxxxxxxxxx>
- Subject: Re: [Full-disclosure] Microsoft Windows and *nix Telnet Port Number Argument Obfuscation
- From: Devdas Bhagat <devdas@xxxxxxxxxxxxxxxxx>
- Date: Sat, 11 Jun 2005 23:23:29 +0530
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
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