Vulnerability in Logitech S120
CVE-2021-38547
Logitech Z120 and S120 speakers 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 device's 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.
EPSS: 0.013 (68.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Logitech S120
- Logitech S120_firmware
- Logitech Z120
- Logitech Z120_firmware
- N/a — versions n/a
References
- cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-38547?
- CVE-2021-38547 is a medium-severity vulnerability in Logitech S120. CVSS score: 5.9/10. Published 2021-08-11.
- How severe is CVE-2021-38547?
- Medium severity. CVSS v3 base score is 5.9 out of 10.