Vulnerability Details CVE-2021-34148
The Bluetooth Classic implementation in the Cypress WICED BT stack through 2.9.0 for CYW20735B1 devices does not properly handle the reception of LMP_max_slot with a greater ACL Length after completion of the LMP setup procedure, allowing attackers in radio range to trigger a denial of service (firmware crash) via a crafted LMP packet.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 28.6%
CVSS Severity
CVSS v3 Score 6.5
CVSS v2 Score 6.1
References
- https://dl.packetstormsecurity.net/papers/general/braktooth.pdf
- https://www.cypress.com/documentation/datasheets/cyw20735b1-single-chip-bluetooth-transceiver-wireless-input-devices
- https://dl.packetstormsecurity.net/papers/general/braktooth.pdf
- https://www.cypress.com/documentation/datasheets/cyw20735b1-single-chip-bluetooth-transceiver-wireless-input-devices
Products affected by CVE-2021-34148
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cpe:2.3:h:cypress:cyw20735b1:-
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cpe:2.3:o:cypress:wireless_internet_connectivity_for_embedded_devices:-
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cpe:2.3:o:cypress:wireless_internet_connectivity_for_embedded_devices:2.9.0