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Category:   Application (Forum/Board/Portal)  >   Serendipity Vendors:
Serendipity Input Validation Flaws in Processing Request URI and HTTP Referer Field May Permit HTTP Response Splitting Attacks
SecurityTracker Alert ID:  1011864
SecurityTracker URL:
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Updated:  Oct 22 2004
Original Entry Date:  Oct 21 2004
Impact:   Modification of system information, Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): prior to 0.7-rc1; tested on 0.7-beta4
Description:   An input validation vulnerability was reported in Serendipity. A remote user can conduct HTTP response splitting attacks.

The vendor reported that a remote user may be able to cause the target server to return a split response. A remote user can exploit this to spoof content on the target server, attempt to poison any intermediate web caches, or conduct cross-site scripting attacks.

The processing of the requested URI in 'index.php' and of the HTTP Referer field in 'comments.php' is affected.

Chaotic Evil later provided a demonstration exploit URL [with Base64 encoding for the 'url' parameter value]:


The vendor was notified on October 14, 2004.

The vendor credits Chaotic Evil with reporting this flaw.

Impact:   A remote user can create an HTTP request that, when submitted by the target user, will cause arbitrary content to be displayed.

A remote user may be able to poison any intermediate web caches with arbitrary content.

Solution:   The vendor has released a fixed version (0.7-rc1), available at:

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

Message History:   None.

 Source Message Contents

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