medium6.5
CVE-2021-34147
The Bluetooth Classic implementation in the Cypress WICED BT stack through 2.9.0 for CYW20735B1 does not properly handle the reception of a malformed LMP timin…
Impact
The Bluetooth Classic implementation in the Cypress WICED BT stack through 2.9.0 for CYW20735B1 does not properly handle the reception of a malformed LMP timing accuracy response followed by multiple reconnections to the link slave, allowing attackers to exhaust device BT resources and eventually trigger a crash via multiple attempts of sending a crafted LMP timing accuracy response followed by a sudden reconnection with a random BDAddress.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Cypress | Wireless Internet Connectivity For Embedded Devices | through 2.9.0 |
References
- NVD record
- CVE.org record
- 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