bugtraq - Re: [PHP] include() bypassing filter with php://input

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Message-ID: <40B7BA6E.107@alicampbell.org.uk>
Date: Fri, 28 May 2004 23:17:18 +0100
From: Ali Campbell <bugtraq@...campbell.org.uk>
To: bugtraq@...urityfocus.com
Subject: Re: [PHP] include() bypassing filter with php://input


I tested this - AFAI can tell it is exploitable against and only against 
some page along these lines, as you suggest:

<HTML><HEAD></HEAD><BODY>
<!-- header stuff goes here -->
<?php
   include ($_GET['page']);
?>
<!-- footer stuff goes here -->
</BODY></HTML>

... and if you code things in this remarkable way, you deserve to get 
'sploited silly, vuln or no vuln. Why not go the whole hog and add the line

eval ($_GET['go_ahead_and_sploit_my_trousers_off']);

while you're at it ?

Ali



clez wrote:

> Hi there!
> 
> i use php 4.3.5 and tried this "proof of concept". i assumed, that the
> form attribute "methode" is a typing mistake and adapted the exploit to
> get it working under a php 4.3.x default configuration (it's kinda
> paradox to use autoglobals in an exploit that aims to secure other
> products).
> 
> but even this adapted version (see below) does not show anything on
> execution.
> 
> this exploit seems to rely on a exploitable web service, that gets paths
> to include files from a get variable named "page".
> 
> so this seems to me like a (fixed/changed) bug at the single service
> "www.exemple.com" (not to be mixed up with www.example.com from rfc
> 2606) and not a general php issue.