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Category:   Application (Generic)  >   Jebuch Vendors:   Erdmann, Jan
Jebuch BBCode Image Tag Input Validation Flaw Lets Remote Users Conduct Cross-Site Scripting Attacks
SecurityTracker Alert ID:  1011774
SecurityTracker URL:  http://securitytracker.com/id/1011774
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Oct 19 2004
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
Description:   An input validation vulnerability was reported in Jebuch. A remote user can conduct cross-site scripting attacks.

PuWu reported that Jebuch does not filter scripting code from BBCode tags. A remote user can submit a specially crafted comment that, when viewed 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 Jebuch 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.

A demonstration exploit tag is provided:

[img]"?" onError="window.location='http://dangerousrage.net'"[/img]

The 'eintragen.php3' script is reportedly affected.

Impact:   A remote user can access the target user's cookies (including authentication cookies), if any, associated with the site running the Jebuch 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.
Cause:   Input validation error
Underlying OS:  Linux (Any), UNIX (Any), Windows (Any)

Message History:   None.


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