CVE-2021-38549 (GCVE-0-2021-38549)

Vulnerability from cvelistv5 – Published: 2021-08-11 15:24 – Updated: 2024-08-04 01:44
VLAI?
Summary
MIRACASE MHUB500 USB splitters 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 USB splitter supplies power to some speakers. The power indicator LED of the USB splitter is connected directly to the power line, as a result, the intensity of the USB splitter's power indicator LED is correlative to its power consumption. The sound played by the connected speakers affects the USB splitter'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 USB splitter, we can recover the sound played by the connected speakers.
Severity ?
No CVSS data available.
CWE
  • n/a
Assigner
References
Show details on NVD website
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