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DeluxeBB Multiple Vulnerabilities



DeluxeBB Multiple Vulnerabilities

 
Author: Attila Gerendi (Darkz)
Date: July 30, 2006

Package: DeluxeBB (http://www.deluxebb.com/)
Versions Affected: 1.08 (Other versions may also be affected.)
Severity: Cross-Site Scripting, Cookie Manipulation, Login Bypass

 

 

Cross-Site Scripting:

 

When posting a new topic the topic title field (subject in newpost.php)  is not 
properly sanitised before being returned to the user. This can be used to stole 
users cookie and cookies contain username/password data usable to bypass login 
sequences.

 

Cookie Manipulation:

 

 The PM system (pm.php) is using a very poor or we can say it is not using at 
al a member validation. This file can be accessed directly, the remote attacker 
have just to set a valid username in the membercookie cookie parameter. This 
can be used to access/use everybody personal messenger.

 

Example of member validation used in the file:


$getpm = $db->query("SELECT type,hasread FROM ".$prefix."pm WHERE 
(whoto='$membercookie')");



Another weakness is the fact that the password md5 is always carried with the 
cookies and it can be stolen by sniffers or with XSS and even decrypted with 
rainbow tables.

 

There may be more  vulnerabilities there.

The Author was contacted via home page "personal messenger" module at July 30 
2006. The problem was fixed on the product main website, and a new release is 
scheduled. 

Solution:
You may edit the source code to ensure that input is properly sanitised.