Bugtraq: Land Down Under 601

[<gdayworld () hotmail com>]

  Application :- Land Down Under
=+++++++++++++++++++++++++=

http://ldu.neocrome.net/

Versions Affect: LDU 601 (other versions not checked)
Risk Factor - Undertimend
Impact - In the least, the attacker could gain access to a users account (unless logged in)
Type of Exploit - SQL Injection (auth.php)
Vendor Status: Vendor Notified
Date: 08 December, 2003
Credit: HelloWorld
Tested on a localhost, magic_quotes_goc off. Php 4.0.1

1) Introduction
2) The vulnerability
3) The exploit
4) The fix
5) Credit/Conclusion


1) Introduction

This php script is easily exploited. It comes in a form of an SQL injection, through the standard login form (auth.php) 
and from appearances, many other places. It appears the writer of the script is unaware of SQL injection vulnerability, 
or relies solely on magic_quote_gpc (a php option which allows automatic slashing to all ‘ and “ in GET/POST/COOKIE 
data).

The Vulnerability

Land Down Under lacks basic security for checking user inputted data. It makes no attempt to apply slashes to any of 
the incomming data, and therefore the attacker can simply ‘inject’ some extra SQL to the original query.

Here is where the actual vulnerable code exists (comments added by me):
############### START HERE ############### 
// More code above
if ($a=="check")
        {
        ldu_shield_protect();

        $rusername = cv('rusername','P','TXT');
        $rpassword = cv('rpassword','P','TXT');
        $rmdpass  = md5($rpassword);
    $query="SELECT user_id, user_active, user_banned, user_banexpire, user_level, user_skin, user_lang FROM $db_users 
WHERE user_password='$rmdpass' AND user_name='$rusername'";

        $sql = ldu_mysql_query($query);
// Continues to validate.
################ END HERE ################ 


The Exploit

Using the form simply put in "' OR 1=1 -- " (without quotes). For a specific user, simply type "' OR 
user_name='USERNAME' -- " (without quotes)

The Fix

Wait vendor respounce. Basic solution would be to addslashes to the incoming data, or turn on magic_quotes.gpc via php 
ini. Most likely there are more possible exploits, further auditing definetly needs to occur. Some may not need ‘ 
either, allowing SQL injection even if magic_quotes_gpc is on.

Credit/Conclusion

Sorry for the badly formatted and poorly written document. Written as quick as the vulneribility was found, which 
wasn't long.  The package contains some nice features, and its skins are pleasant to the eye, but lacks the basic and 
vital security to enable it to be accessible via the public.

This vulnerability was discovered by HelloWorld 
email:
gdayworld 
hotmail 
com

Good Luck
HelloWorld.