jd2k2000hotmail.com
Date: Sat Apr 14 2007 - 22:53:22 CDT

• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

########################################################
# Special Greetings To - Timq,Warpboy,The-Maggot #
########################################################

File: index.php
Affects: LS simple guestbook (v1)
Date: 15th April 2007

Issue Description:
===========================================================================
LS simple guestbook fails to sanitize user input that it writes to the
posts.txt file when the user leaves a message, this file is then included
causing any php code within it to be run.
===========================================================================

Scope:
===========================================================================
An attacker can inject arbitrary php code and potentially execute commands
on the system.
===========================================================================

Recommendation:
===========================================================================
Add the following line of code in index.php:

$message = strip_tags($message);

just above:

if ($message != "") {$file = fopen("$dataf","a");
===========================================================================

Example:

name = Test
message = <?php phpinfo(); ?>

Discovered By: Gammarays

• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]