ID CVE-2021-38549
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.
References
Vulnerable Configurations
  • cpe:2.3:o:benda:miracase_hmub500_firmware:*:*:*:*:*:*:*:*
    cpe:2.3:o:benda:miracase_hmub500_firmware:*:*:*:*:*:*:*:*
  • cpe:2.3:h:benda:miracase_hmub500:-:*:*:*:*:*:*:*
    cpe:2.3:h:benda:miracase_hmub500:-:*:*:*:*:*:*:*
CVSS
Base: 4.3 (as of 20-08-2021 - 19:34)
Impact:
Exploitability:
CWE NVD-CWE-noinfo
CAPEC
Access
VectorComplexityAuthentication
NETWORK MEDIUM NONE
Impact
ConfidentialityIntegrityAvailability
PARTIAL NONE NONE
cvss-vector via4 AV:N/AC:M/Au:N/C:P/I:N/A:N
Last major update 20-08-2021 - 19:34
Published 11-08-2021 - 16:15
Last modified 20-08-2021 - 19:34
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