Car whisperer

Definition
Car Whisperer is a software tool developed by European security researchers that exploits a key implementation issue in hands-free Bluetooth car kits installed in automobiles. The car whisperer software allows an attacker to send to or receive audio from the car kit. An attacker could transmit audio to the car’s speakers or receive audio (eavesdrop) from the microphone in the car.

Source

 * NIST Special Publication 800-121, at 4-3.