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Category:   Application (Commerce)  >   Miva Merchant Vendors:   Miva Corporation
MIVA Merchant Input Validation Holes Permit Cross-Site Scripting Attacks
SecurityTracker Alert ID:  1014917
SecurityTracker URL:  http://securitytracker.com/id/1014917
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Sep 16 2005
Impact:   Disclosure of authentication 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): 5
Description:   A vulnerability was reported in MIVA Merchant. A remote user can conduct cross-site scripting attacks.

The software does not properly filter HTML code from user-supplied input in several parameters before displaying the input. 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 MIVA Merchant 5 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.

The 'Customer_Login' parameter and other parameters are affected.

A demonstration exploit URL is provided:

http://[target]/mm5/merchant.mvc?Screen=ACNT&Action=EMPW&Customer_Login="><script>document.write("\n<br><input%20type=text%20name=somenewfield%20value='Hello%20World'>")</script>

admin at HyperConX reported this vulnerability.

Impact:   A remote user can access the target user's cookies (including authentication cookies), if any, associated with the site running the MIVA Merchant 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 an update (core-4), available via the update wizard in the administrative panel.
Vendor URL:  smallbusiness.miva.com/products/merchant/ (Links to External Site)
Cause:   Input validation error

Message History:   None.


 Source Message Contents

Subject:  XSS Vulnerability in MIVA Merchant 5 - Includes Fix

MIVA Merchant 5 is vulnerable to XSS attack. Users can use javascript to embed their own inputs into the MM5 screens and checkout
 pages overriding various store safeguards and functions.

MIVA Corporation has been very cooperative and has already posted an update to their software entitled (core-4). Users of MIVA Merchant
 5 should login to their admin panels and allow the update wizard to make the current updates to (core-4). An earlier patch entitled
 (core-2) should be installed prior to installing (core-4).

The update includes the sanity checking and cleanup of several key variables and fixes other security issues found with the new templating
 system.

XSS Sample:
http://HOSTNAME/mm5/merchant.mvc?Screen=ACNT&Action=EMPW&Customer_Login="><script>document.write("\n<br><input%20type=text%20name=somenewfield%20value='Hello%20World'>")</script>

 
 


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