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Category:   Application (Forum/Board/Portal)  >   ReBB Vendors:   ReBB.net
ReBB Image Tag Cross-Site Scripting Hole Lets Remote Users Steal Cookies of ReBB Users
SecurityTracker Alert ID:  1003733
SecurityTracker URL:  http://securitytracker.com/id/1003733
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Mar 5 2002
Impact:   Disclosure of authentication information, Execution of arbitrary code via network
Exploit Included:  Yes  

Description:   A cross site-scripting vulnerability was reported in the ReBB bulletin board software. A remote user may be able to steal the cookies of ReBB users.

It is reported that ReBB does not filter the content of user-supplied image tags inserted into bulletin board messages.

A remote user can insert malicious javascript into a message so that, when the message is viewed by a target (victim) user, it will cause arbitrary javascript to be executed by the target user's browser. The code will run in the security context of the ReBB site and will be able to access the target user's cookies associated with that site. This allows a remote user to steal the target user's cookies associated with the ReBB site.

A demonstration exploit string is:

[img]javascript:alert('test')[/img]

Impact:   A remote user can cause arbitrary javascript to be executed to steal the target (victim) user's cookies associated with the ReBB site.
Solution:   No solution was available at the time of this entry.
Vendor URL:  www.rebb.net/ (Links to External Site)
Cause:   Input validation error
Underlying OS:  Linux (Any), UNIX (Any)
Underlying OS Comments:  PHP-based

Message History:   None.


 Source Message Contents

Subject:  ReBB javascripts vulnerability


  Hi!

    Another php - board named ReBB 
(http://www.rebb.net) has a [img] vulnerability. 
   
  Exploit:
    Use this string (my favorite :)) - 
[img]javascript:alert('test')[/img]

  Possible decision:    
    All urls in [img] tag should start with http://

                                SliderGod
  

 
 


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