########################################################
# 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
