ID |
CVE-2021-38549
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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 |
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Vulnerable Configurations |
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CVSS |
Base: | 4.3 (as of 20-08-2021 - 19:34) |
Impact: | |
Exploitability: | |
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CWE |
NVD-CWE-noinfo |
CAPEC |
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Access |
Vector | Complexity | Authentication |
NETWORK |
MEDIUM |
NONE |
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Impact |
Confidentiality | Integrity | Availability |
PARTIAL |
NONE |
NONE |
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cvss-vector
via4
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AV:N/AC:M/Au:N/C:P/I:N/A:N
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Last major update |
20-08-2021 - 19:34 |
Published |
11-08-2021 - 16:15 |
Last modified |
20-08-2021 - 19:34 |