Denial of Service Vulnerability in Cypress WICED BT Stack for CYW20735B1 Devices

Denial of Service Vulnerability in Cypress WICED BT Stack for CYW20735B1 Devices

CVE-2021-34145 · MEDIUM Severity

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

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 an invalid Baseband packet type (and LT_ADDRESS and LT_ADDR) 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.

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