CVE-2021-31785

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The Bluetooth Classic implementation on Actions ATS2815 and ATS2819 chipsets does not properly handle the reception of multiple LMP_host_connection_req packets, allowing attackers in radio range to trigger a denial of service (deadlock) of the device via crafted LMP packets. Manual user intervention is required to restart the device and restore Bluetooth communication.

Una implementación de Bluetooth Classic en los conjuntos de chips Actions ATS2815 y ATS2819, no maneja apropiadamente la recepción de múltiples paquetes LMP_host_connection_req, permitiendo a atacantes en el rango de radio desencadenar una denegación de servicio (bloqueo) del dispositivo por medio de paquetes LMP diseñados. Es requerida una intervención manual del usuario para reiniciar el dispositivo y restaurar la comunicación Bluetooth

*Credits: N/A

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Adjacent

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-04-23 CVE Reserved
2021-09-03 CVE Published
2024-05-23 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-667: Improper Locking

CAPEC

References (3)

URL	Tag	Source
https://dl.packetstormsecurity.net/papers/general/braktooth.pdf	Technical Description
https://launchstudio.bluetooth.com/ListingDetails/76427	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://www.actions-semi.com/index.php?id=3581&siteId=4	2022-05-03

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Actions-semi Search vendor "Actions-semi"	Ats2819p Firmware Search vendor "Actions-semi" for product "Ats2819p Firmware"	-	-	Affected	in	Actions-semi Search vendor "Actions-semi"	Ats2819p Search vendor "Actions-semi" for product "Ats2819p"	-	-	Safe
Actions-semi Search vendor "Actions-semi"	Ats2815 Firmware Search vendor "Actions-semi" for product "Ats2815 Firmware"	-	-	Affected	in	Actions-semi Search vendor "Actions-semi"	Ats2815 Search vendor "Actions-semi" for product "Ats2815"	-	-	Safe
Actions-semi Search vendor "Actions-semi"	Ats2819 Firmware Search vendor "Actions-semi" for product "Ats2819 Firmware"	-	-	Affected	in	Actions-semi Search vendor "Actions-semi"	Ats2819 Search vendor "Actions-semi" for product "Ats2819"	-	-	Safe
Actions-semi Search vendor "Actions-semi"	Ats2819s Firmware Search vendor "Actions-semi" for product "Ats2819s Firmware"	-	-	Affected	in	Actions-semi Search vendor "Actions-semi"	Ats2819s Search vendor "Actions-semi" for product "Ats2819s"	-	-	Safe
Actions-semi Search vendor "Actions-semi"	Ats2819t Firmware Search vendor "Actions-semi" for product "Ats2819t Firmware"	-	-	Affected	in	Actions-semi Search vendor "Actions-semi"	Ats2819t Search vendor "Actions-semi" for product "Ats2819t"	-	-	Safe