Dalle citazioni sulla sicurezza della settimana di LWN:
These days audio hardware usually consists of a very generic codec containing a bunch of digital→analogue converters, some analogue→digital converters and a bunch of io pins that can basically be wired up in arbitrary ways. Hardcoding the roles of these pins makes board layout more annoying and some people want more inputs than outputs and some people vice versa, so it's not uncommon for it to be possible to reconfigure an input as an output or vice versa. From software.
Anyone who's ever plugged a microphone into a speaker jack probably knows where I'm going with this. An attacker can "turn off" your TV, reconfigure the internal speaker output as an input and listen to you on your "microphoneless" TV. Have a nice day, and stop telling people that putting glue in their laptop microphone is any use unless you're telling them to disconnect the internal speakers as well.
Non posso dire se Garret sia serio qui. Mentre un chip audio essendo un convertitore generico ha senso, non vedo come un diffusore medio possa convertire l'audio in ingresso in un segnale utile. Gli altoparlanti sono sensibili?
È possibile utilizzare un software per gestire un altoparlante medio come un microfono?