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.
References
| Link | Resource |
|---|---|
| https://dl.packetstormsecurity.net/papers/general/braktooth.pdf | Technical Description Third Party Advisory |
| https://www.cypress.com/documentation/datasheets/cyw20735b1-single-chip-bluetooth-transceiver-wireless-input-devices | Vendor Advisory |
Configurations
Configuration 1 (hide)
| AND |
|
History
14 Sep 2021, 15:15
| Type | Values Removed | Values Added |
|---|---|---|
| CWE | NVD-CWE-noinfo | |
| References | (MISC) https://dl.packetstormsecurity.net/papers/general/braktooth.pdf - Technical Description, Third Party Advisory | |
| References | (MISC) https://www.cypress.com/documentation/datasheets/cyw20735b1-single-chip-bluetooth-transceiver-wireless-input-devices - Vendor Advisory | |
| CVSS |
v2 : v3 : |
v2 : 6.1
v3 : 6.5 |
| CPE | cpe:2.3:o:cypress:wireless_internet_connectivity_for_embedded_devices:*:*:*:*:*:*:*:* cpe:2.3:h:cypress:cyw20735b1:-:*:*:*:*:*:*:* |
07 Sep 2021, 07:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2021-09-07 07:15
Updated : 2024-02-04 21:47
NVD link : CVE-2021-34147
Mitre link : CVE-2021-34147
CVE.ORG link : CVE-2021-34147
JSON object : View
Products Affected
cypress
- cyw20735b1
- wireless_internet_connectivity_for_embedded_devices
CWE