Subject: XSS vulnerability in XOOPS 2.0.5.1
Date: 15:44, domenica 21 dicembre 2003
From: Chintan Trivedi <chesschintan@hotmail.com>
To:
bugtraq@securityfocus.com====================================================================
Advisory by Eye On Security Research Group - India www.eos-india.net
====================================================================
1.==============================================================Product
2.===============================================================Vendor
3.========================================================Vulnerability
4.========================================================About Product
5.=============================================Details of vulnerability
6.==============================================================Exploit
7.==============================================================Credits
1. Product
==========
XOOPS 2.0.5.1
2. Vendor
=========
www.xoops.org
3. Vulnerability
================
XSS vulnerability in module weblinks
4. About XOOPS
==============
XOOPS is a dynamic OO (Object Oriented) based open source portal
script written in PHP. XOOPS supports a number of databases, making
XOOPS an ideal tool for developing small to large dynamic community
websites, intra company portals, corporate portals, weblogs and much
more.
5. Details of vulnerability
===========================
The weblinks module contains a file named "myheader.php" in
/modules/mylinks/ directory. The code of the file is as follow :
---------------------------------
include "../../mainfile.php";
$url = $HTTP_GET_VARS['url'];
$lid = intval($HTTP_GET_VARS['lid']);
.
.
.
<td class='bg4' align="center"><small>
<a target="main" href="ratelink.php?cid=<? echo $cid; ?>&lid=<?
echo $lid; ?>"><? echo _MD_RATETHISSITE; ?></a> | <a target="main"
href="modlink.php?lid=<? echo $lid; ?>"><? echo _MD_MODIFY; ?></a> |
<a target="main" href="brokenlink.php?lid=<? echo $lid; ?>"><? echo
_MD_REPORTBROKEN; ?></a> | <a target='_top' href='mailto:?subject=<?
echo $mail_subject; ?>&body=<? echo $mail_body;?>'><? echo
_MD_TELLAFRIEND; ?></a> | <a target='_top' href="<? echo XOOPS_URL;
?>">Back to <? echo $xoopsConfig['sitename']; ?></a> | <a
target='_top' href="<? echo $url; ?>">Close Frame</a> </small>
.
.
-----------------------------------
The value for variable "url" is used in line
<a target='_top' href="<? echo $url; ?>">Close Frame</a>
Thus an attacker can pass a javascript code as a value for variable
url and get it executed as soon as the victim clicks the "Close Frame"
link.
6. Exploit
==========
http://[target]/modules/mylinks/myheader.php?url=javascript:alert(docum
ent.cookie);
Clicking the above link, the victim gets directed to a page containing
a link "Close Frame" which is actually the javascript code inserted by
the attacker. The cookie revealed is quite informatic for the attacker
to login with the hijacked user (including admin) privileges.
7. Credits
==========
Chintan Trivedi -
http://www.hackersprogrammers.com"Eye on Security Research Group - India " - www.eos-india.net
