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Category:   Application (Forum/Board/Portal)  >   MercuryBoard Vendors:   mercuryboard.com
MercuryBoard 'forum.php' Input Validation Error in 'f' Parameter Permits Cross-Site Scripting Attacks
SecurityTracker Alert ID:  1013223
SecurityTracker URL:  http://securitytracker.com/id/1013223
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Feb 17 2005
Impact:   Disclosure of authentication information, Disclosure of user information, Execution of arbitrary code via network, Modification of user information
Exploit Included:  Yes  
Version(s): 1.0.x, 1.1.x
Description:   Lostmon reported an input validation vulnerability in MercuryBoard. A remote user can conduct cross-site scripting attacks.

The 'forum.php' script does not properly validate user-supplied input in the 'f' parameter. A remote user can create a specially crafted URL that, when loaded by a target user, will cause arbitrary scripting code to be executed by the target user's browser. The code will originate from the site running the MercuryBoard software and will run in the security context of that site. As a result, the code will be able to access the target user's cookies (including authentication cookies), if any, associated with the site, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.

Some demonstration exploit URLs are provided:

http://[target]/index.php?a=forum&f='%3E%3Cscript%3Ealert(document.cookie)%3C/script%3E
http://[target]/index.php?a=forum&f='><script>alert(document.cookie)</script>

The vendor was notified on February 14, 2004.

Impact:   A remote user can access the target user's cookies (including authentication cookies), if any, associated with the site running the MercuryBoard software, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.
Solution:   No solution was available at the time of this entry.
Vendor URL:  www.mercuryboard.com/ (Links to External Site)
Cause:   Input validation error
Underlying OS:  Linux (Any), UNIX (Any), Windows (Any)

Message History:   None.


 Source Message Contents

Subject:  Mercuryboard 1.0.x & 1.1.x forum.php f variable XSS


################################################
Mercuryboard 1.0.x & 1.1.x forum.php f variable XSS
vendor url: http://www.mercuryboard.com
advisore:http://lostmon.blogspot.com/2005/02/mercuryboard-forumphp-f-variable-xss.html
exploit avaible :yes vendor: emailed 
################################################


MercuryBoard is a powerful message board system dedicated to raw speed
with a mixture of features, ease of use, and ease of customization
coupled with expandability, and diverse language services


Mercuryboard contains a flaw that allows a remote cross site scripting
attack.  This flaw exists because the application does not validate
'f' variable upon submission to the  'forun.php' script.  This could
allow a user to create a specially crafted URL that would execute
arbitrary code in a user's browser within the trust relationship
between the browser and the server, leading to a loss of integrity.

afected versions :

1.0.x
1.1.x


Proof  of concept 

http://[victim]/index.php?a=forum&f='%3E%3Cscript%3Ealert(document.cookie)%3C/script%3E
http://[victim]/index.php?a=forum&f='><script>alert(document.cookie)</script>

impact:

Loss of confidenciality
Information disclosure
path disclosure
imput manipulation.

solution:

Currently, there are no known upgrades, patches, or workarounds
available to correct this issue.


release time :

discovered :       2005-02-13 
Email to vendor: 2005-02-14
disclosure date: 2005-02-16

Atentamente:

Lostmon (lostmon@gmail.com)

Thnx to estrella Ke tailoviu un monton :P
thnx to all for the support.

-- 
Blog: http://lostmon.blogspot.com/

La curiosidad es lo que hace mover la mente....
 
 


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