CVE-2021-34145

medium

Description

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.

References

https://www.cypress.com/documentation/datasheets/cyw20735b1-single-chip-bluetooth-transceiver-wireless-input-devices

https://dl.packetstormsecurity.net/papers/general/braktooth.pdf

Details

Source: Mitre, NVD

Published: 2021-09-07

Updated: 2021-09-14

Risk Information

CVSS v2

Base Score: 2.9

Vector: CVSS2#AV:A/AC:M/Au:N/C:N/I:N/A:P

Severity: Low

CVSS v3

Base Score: 5.3

Vector: CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Severity: Medium

EPSS

EPSS: 0.00116