The hacked iPhone or Android handset will require its headphones to be plugged in, where the hack will then be able to remotely and silently access the smartphone’s built-in voice controls, without the user being any wiser for it. French government agency ANSSI’s researchers discovered that they could control Apple’s Siri or Android’s Google Now from a distance of up to 16 feet away, where this hack is made possible with a radio transmitter that will tap into a pair of headphones which carry an integrated microphone that remains plugged into the mobile device.
The headphone cable will function as an antenna, and this scenario can be exploited to let the Android or iOS device into believing that the audio commands actually originate from the connected microphone. Scary isn’t it – without having to actually speak a single work, such a form of radio attack can instruct Siri or Google Now to make a phone call, send a text, send the phone’s browser to a malware site – the possibilities are many.