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 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.

Related CPE's

o

cypress

wireless_internet_connectivity_for_embedded_devices

Vulnerable

h

cypress

cyw20735b1

-

References

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

Technical DescriptionThird Party Advisory

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

Vendor Advisory

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

Technical DescriptionThird Party Advisory

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

Vendor Advisory

Weaknesses

[email protected]

Primary
NVD-CWE-noinfo

CVSS impact metrics

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

6.5 · Medium

Information

Source identifier

[email protected]

Vulnerability status

Modified

Published

2021-09-07T07:15:07.420Z

5 years ago

Last modified

2026-06-17T03:55:30.973Z

2 months ago