CVE-2021-34145

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.

Score

CVSS 3.1 5.3 Medium

Status

Modified - cve@mitre.org

Published

2021-09-07

Last modified

2024-08-04

Affected products

• Wireless Internet Connectivity For Embedded Devices (Cypress)

References

• https://dl.packetstormsecurity.net/papers/general/braktooth.pdf
• https://www.cypress.com/documentation/datasheets/cyw20735b1-single-chip-bluetooth-transceiver-wireless-input-devices