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CVE-2021-34147

Status Candidate

Overview

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.

Related Files

BRAKTOOTH: Causing Havoc On Bluetooth Link Manager
Posted Sep 3, 2021
Authored by Vaibhav Bedi, Matheus E. Garbelini, Ernest Kurniawan, Sudipta Chattopadhyay, Sumei Sun | Site asset-group.github.io

This whitepaper discusses BRAKTOOTH, a family of new security vulnerabilities in commercial BT stacks that range from denial of service (DoS) via firmware crashes and deadlocks in commodity hardware to arbitrary code execution (ACE) in certain IoTs.

tags | advisory, paper, denial of service, arbitrary, vulnerability, code execution
advisories | CVE-2021-28135, CVE-2021-28136, CVE-2021-28139, CVE-2021-28155, CVE-2021-31609, CVE-2021-31610, CVE-2021-31611, CVE-2021-31612, CVE-2021-31613, CVE-2021-31717, CVE-2021-31785, CVE-2021-31786, CVE-2021-34143, CVE-2021-34144, CVE-2021-34145, CVE-2021-34146, CVE-2021-34147, CVE-2021-34148, CVE-2021-34149, CVE-2021-34150
SHA-256 | ec29de4f145eee5ced7ab6a0c5389c72ee16a987352a4373d9ef5da684cef2ac
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