Raspberry Pi 3 B+ and 4 B devices through 2021-08-09, in certain specific use cases in which the device supplies power to audio-output equipment, 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. We assume that the Raspberry Pi supplies power to some speakers. The power indicator LED of the Raspberry Pi is connected directly to the power line, as a result, the intensity of a device's power indicator LED is correlative to the power consumption. The sound played by the speakers affects the Raspberry Pi's power consumption and as a result is also correlative to the light intensity of the LED. By analyzing measurements obtained from an electro-optical sensor directed at the power indicator LED of the Raspberry Pi, we can recover the sound played by the speakers.
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History

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2021-08-11T15:25:33

Updated: 2024-08-04T01:44:23.398Z

Reserved: 2021-08-11T00:00:00

Link: CVE-2021-38545

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Analyzed

Published: 2021-08-11T16:15:07.280

Modified: 2021-08-23T17:31:09.070

Link: CVE-2021-38545

cve-icon Redhat

No data.