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Category:   Application (Web Server/CGI)  >   Xerver Vendors:   JavaScript.nu
Xerver Bugs Let Remote Users View Index Directory Listings, Obtain Script Source Code, and Conduct Cross-Site Scripting Attacks
SecurityTracker Alert ID:  1015079
SecurityTracker URL:  http://securitytracker.com/id/1015079
CVE Reference:   CVE-2005-3293, CVE-2005-4774   (Links to External Site)
Updated:  Jun 15 2008
Original Entry Date:  Oct 19 2005
Impact:   Disclosure of authentication information, Disclosure of system information, Disclosure of user information, Execution of arbitrary code via network, Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): 4.17
Description:   Ziv Kamir of Global Security Solution IT reported a vulnerability in Xerver. A remote user can view index directory listings, obtain script source code, and conduct cross-site scripting attacks.

A remote user can supply a specially crafted URL to view an index directory listing even if the directory contains an index HTML file.

A remote user can supply a specially crafted URL to obtain the source code for a script on the server.

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 Xerver 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]/Test.pl. ( '.' )

http://[target]/Test.php%2e ( '%2e' )

http://[target]/%00/

http://[target]/%00/<script>alert('X.S.S')</script>

Impact:   A remote user can view index directory listings.

A remote user can obtain script source code.

A remote user can access the target user's cookies (including authentication cookies), if any, associated with the site running the Xerver 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 issued a fixed version (4.20), available at:

http://www.javascript.nu/xerver/

Vendor URL:  www.javascript.nu/xerver/ (Links to External Site)
Cause:   Access control error, Input validation error
Underlying OS:  Java, Linux (Any), UNIX (Any), Windows (Any)

Message History:   None.


 Source Message Contents

Subject:  Xerver Vuln

Xerver 4.17

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19/10/05


====================================
 GSSIT - Global Security Solution IT
====================================		

-------------------------------------------------------

Application: Xerver
Web Site:    www.javascript.nu/xerver/
Versions:    4.17
Platform:    

             
                           
Credits:
########

#########################################
#         ==  Ziv Kamir ==              #
#                                       #
# GSSIT - Global Security Solution IT   #                   
#                                       #
#     WEB : www.gssit.co.il             #
#                                       #
#                                       #
#########################################

---------------------

1) Introduction
2) Bugs
3) The Code
4) Fix


================
1) Introduction
================

Xerver is an advanced free GNU GPL Web and FTP server.


=======
2) Bugs
=======

* Xerver allows a remote user to obtain Scripts source code from the server.

* A remote user can force the server to "listing Directory" even if there is an "INDEX" file.

* Cross-Site-Scripting Vulnerability.

===========
3) The Code
===========

* http://[Target]/Test.pl. ( '.' )
  http://[Target]/Test.php%2e ( '%2e' )

* http://[Target]/%00/

* http://[Target]/%00/<script>alert('X.S.S')</script>


======
4) Fix
======


Upgrade to version 4.20



==============================================================================================

                 *** The Data is for educational purpose only. *** 

          The information in this bulletin is provided "AS IS" without 
          warranty of any kind. In no event shall we be liable for any 
          damages whatsoever including direct, indirect, incidental, 
          consequential, loss of business profits or special damages. 

==============================================================================================
 
 


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