cve/2021/CVE-2021-34144.md

### [CVE-2021-34144](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34144)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brightgreen)

### Description

The Bluetooth Classic implementation in the Zhuhai Jieli AC6366C BT SDK through 0.9.1 does not properly handle the reception of truncated LMP_SCO_Link_Request packets while no other BT connections are active, allowing attackers in radio range to prevent new BT connections (disabling the AB5301A inquiry and page scan procedures) via a crafted LMP packet. The user needs to manually perform a power cycle (restart) of the device to restore BT connectivity.

### POC

#### Reference
- https://dl.packetstormsecurity.net/papers/general/braktooth.pdf

#### Github
- https://github.com/ARPSyndicate/cvemon
- https://github.com/JeffroMF/awesome-bluetooth-security321
- https://github.com/Matheus-Garbelini/braktooth_esp32_bluetooth_classic_attacks
- https://github.com/engn33r/awesome-bluetooth-security