What is the severity of CVE-2021-34147?

CVE-2021-34147 has a severity rating of 6.5, which is considered medium.

What software is affected by CVE-2021-34147?

The affected software is Cypress Wireless Internet Connectivity For Embedded Devices version up to and including 2.9.0.

Is Cypress Cyw20735b1 affected by CVE-2021-34147?

No, Cypress Cyw20735b1 is not vulnerable to CVE-2021-34147.

Vulnerability/
CVE-2021-34147

medium

6.5

7/9/2021

4/8/2024

CVE-2021-34147

Q: What is CVE-2021-34147?

CVE-2021-34147 is a vulnerability in the Bluetooth Classic implementation in the Cypress WICED BT stack through version 2.9.0 for CYW20735B1.

Q: How can an attacker exploit CVE-2021-34147?

An attacker can exploit CVE-2021-34147 by sending a malformed LMP timing accuracy response followed by multiple reconnections to the link slave, leading to exhaustion of device Bluetooth resources.

First published: Tue Sep 07 2021(Updated: )

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.

Credit: cve@mitre.org

Affected Software	Affected Version	How to fix
Cypress Wireless Internet Connectivity For Embedded Devices	<=2.9.0
Cypress Cyw20735b1

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Frequently Asked Questions

What is CVE-2021-34147?
CVE-2021-34147 is a vulnerability in the Bluetooth Classic implementation in the Cypress WICED BT stack through version 2.9.0 for CYW20735B1.
What is the severity of CVE-2021-34147?
CVE-2021-34147 has a severity rating of 6.5, which is considered medium.
What software is affected by CVE-2021-34147?
The affected software is Cypress Wireless Internet Connectivity For Embedded Devices version up to and including 2.9.0.
How can an attacker exploit CVE-2021-34147?
An attacker can exploit CVE-2021-34147 by sending a malformed LMP timing accuracy response followed by multiple reconnections to the link slave, leading to exhaustion of device Bluetooth resources.
Is Cypress Cyw20735b1 affected by CVE-2021-34147?
No, Cypress Cyw20735b1 is not vulnerable to CVE-2021-34147.

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canonical/cypress cyw20735b1

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