CVE-2021-31785 — MEDIUM (6.5)

Vulnerability Description

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.

CVSS Score

6.5

MEDIUM

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

ADJACENT_NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Actions-Semi	Ats2819P Firmware	-
Actions-Semi	Ats2819P	-
Actions-Semi	Ats2815 Firmware	-
Actions-Semi	Ats2815	-
Actions-Semi	Ats2819 Firmware	-
Actions-Semi	Ats2819	-
Actions-Semi	Ats2819S Firmware	-
Actions-Semi	Ats2819S	-
Actions-Semi	Ats2819T Firmware	-
Actions-Semi	Ats2819T	-

Related Weaknesses (CWE)

CWE-667

References

https://dl.packetstormsecurity.net/papers/general/braktooth.pdfTechnical DescriptionThird Party Advisory
https://launchstudio.bluetooth.com/ListingDetails/76427Third Party Advisory
https://www.actions-semi.com/index.php?id=3581&siteId=4Broken LinkVendor Advisory
https://dl.packetstormsecurity.net/papers/general/braktooth.pdfTechnical DescriptionThird Party Advisory
https://launchstudio.bluetooth.com/ListingDetails/76427Third Party Advisory
https://www.actions-semi.com/index.php?id=3581&siteId=4Broken LinkVendor Advisory

FAQ

What is CVE-2021-31785?

CVE-2021-31785 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 tr...

How severe is CVE-2021-31785?

CVE-2021-31785 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-31785?

Check the references section above for vendor advisories and patch information. Affected products include: Actions-Semi Ats2819P Firmware, Actions-Semi Ats2819P, Actions-Semi Ats2815 Firmware, Actions-Semi Ats2815, Actions-Semi Ats2819 Firmware.