JBL Go 2 devices through 2021-08-09 allow remote attackers to recover speech signals from an LED on the device, via a telescope and an electro-optical sensor, aka a Glowworm attack. The power indicator LED of the speakers is connected directly to the power line, as a result, the intensity of a devices power indicator LED is correlative to the power consumption. The sound played by the speakers affects their power consumption and as a result is also correlative to the light intensity of the LEDs. By analyzing measurements obtained from an electro-optical sensor directed at the power indicator LEDs of the speakers, we can recover the sound played by them.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Go_2_firmware | Jbl | * | 2021-08-09 (including) |