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.
Published 2021-08-11 16:15:07
Updated 2021-08-23 17:31:09
Source MITRE
View at NVD,   CVE.org

Exploit prediction scoring system (EPSS) score for CVE-2021-38545

0.41%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 74 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-38545

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
4.3
MEDIUM AV:N/AC:M/Au:N/C:P/I:N/A:N
8.6
2.9
NIST
5.9
MEDIUM CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
2.2
3.6
NIST

References for CVE-2021-38545

Products affected by CVE-2021-38545

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