I've been researching the internet and since is hard to know if a device is vulnerable is better to be prepared at the other end of the USB socket and I found that actually there are some solutions:
For Windows:
There is a free program called G DATA USB Keyboard Guard which basically ask you to grant access when a new device is found:
G DATA has responded by developing USB KEYBOARD GUARD, an add-on that protects you from the most likely form of USB attack - USB devices pretending to be keyboards. If a new keyboard is detected by the system, access is initially denied and a pop-up is displayed. You can then check in your own time whether this really is a keyboard, and either grant or deny access permanently.
There is also a solution for Linux:
I completely agree that, as shipped, most computer systems will be susceptible to this attack, and assume that all of their attacks will work as advertised. What I don't agree with at all is their conclusion, which boils down that no effective defenses exist.
[...]
... you can easily turn off this automatic binding, at least on Linux, with one single command:
[root@optiplex ~]# echo 0 >/sys/bus/usb/drivers_autoprobeNow, whenever you connect a USB device to your computer, it will not automatically connect...
... to manually bind this device, you first have to choose the appropriate USB configuration...
# echo 1 >/sys/bus/usb/devices/5-1/bConfigurationValue ...
(All dots[...] represent paragraphs edited out. Check the full article for more details)
Other solutions for Linux can be found here:
How to prevent BadUSB attacks on linux desktop
If you want to find more about BadUSB there is this article full of resources and links: