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DeluxeBB Multiple Vulnerabilities (newpost.php, pm.php)
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SUMMARY
<http://www.deluxebb.com/> DeluxeBB features "lots of security options
all over the board (like CP logs, Admin Restrictions, Database Backup
System, Email Bot protection, hide email option, user groups) but most
important is the speed". Multiple vulnerability in DeluxeBB have been
found allowing remote attackers to initiate cross site scripting and
cookie manipulation attacks against the product.
DETAILS
Vulnerable Systems:
* DeluxeBB version 1.08
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.
ADDITIONAL INFORMATION
The information has been provided by Attila Gerendi (Darkz).
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