Vulnerability Details CVE-2021-34146
The Bluetooth Classic implementation in the Cypress CYW920735Q60EVB does not properly handle the reception of continuous unsolicited LMP responses, allowing attackers in radio range to trigger a denial of service and restart (crash) of the device by flooding it with LMP_AU_Rand packets after the paging procedure.
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-2021-34146
-
cpe:2.3:h:cypress:cyw20735b1:-
-
cpe:2.3:h:cypress:cyw920735q60evb-01:-
-
cpe:2.3:o:cypress:cyw20735b1_firmware:-
-
cpe:2.3:o:cypress:cyw920735q60evb-01_firmware:-