Xerver Bugs Let Remote Users View Index Directory Listings, Obtain Script Source Code, and Conduct Cross-Site Scripting Attacks
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SecurityTracker Alert ID: 1015079
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SecurityTracker URL: http://securitytracker.com/id?1015079
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CVE Reference: CVE-2005-3293
, CVE-2005-4774
(Links to External Site)
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Updated: Jun 15 2008
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Original Entry Date: Oct 19 2005
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Impact: Disclosure of authentication information, Disclosure of system information, Disclosure of user information, Execution of arbitrary code via network, Modification of user information
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Fix Available: Yes
Exploit Included: Yes
Vendor Confirmed: Yes
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Advisory: Global Security Solution IT (GSSIT)
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Version(s): 4.17
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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>
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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.
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Solution: The vendor has issued a fixed version (4.20), available at:
http://www.javascript.nu/xerver/
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Vendor URL: www.javascript.nu/xerver/ (Links to External Site)
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Cause: Access control error, Input validation error
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Underlying OS: Java, Linux (Any), UNIX (Any), Windows (Any)
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Reported By: GSS IT <gss_it@yahoo.com>
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Message History:
None.
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Source Message Contents
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Date: Wed, 19 Oct 2005 02:26:19 -0700 (PDT)
From: GSS IT <gss_it@yahoo.com>
Subject: Xerver Vuln
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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
==============================================================================================
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==============================================================================================
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