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Category:   Application (Forum/Board/Portal)  >   Serendipity Vendors:   s9y.org
Serendipity Input Validation Hole in 'searchTerm' Variable Lets Remote Users Conduct Cross-Site Scripting Attacks
SecurityTracker Alert ID:  1012383
SecurityTracker URL:  http://securitytracker.com/id/1012383
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Dec 2 2004
Impact:   Disclosure of authentication information, Disclosure of user information, Execution of arbitrary code via network, Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 0.7.1
Description:   An input validation vulnerability was reported in Serendipity. A remote user can conduct cross-site scripting attacks.

The vendor reported that a remote user can cause arbitrary scripting code to be executed by the target user's browser. The code will originate from the site running the Serendipity 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.

Based on code review, the flaw appears to reside in 'compat.php' in the processing of the user-supplied 'searchTerm' variable.

Stefan Esser is credited with reporting this flaw.

Impact:   A remote user can access the target user's cookies (including authentication cookies), if any, associated with the site running the Serendipity 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:   The vendor has released a fixed version (0.7.1), available at:

http://www.s9y.org/12.html

Vendor URL:  www.s9y.org/ (Links to External Site)
Cause:   Input validation error
Underlying OS:  Linux (Any), UNIX (Any), Windows (Any)

Message History:   None.


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