Cyber Resilience

CVE-2021-31785

Medium

Published: 07 September 2021

Published
07 September 2021
Modified
21 November 2024
KEV Added
—
Patch
—
CVSS Score v3.1 6.5 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score 0.0010 27.9th percentile
Risk Priority 13 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-31785 is a medium-severity Improper Locking (CWE-667) vulnerability in Actions-Semi Ats2819P Firmware. Its CVSS base score is 6.5 (Medium).

Operationally, ranked at the 27.9th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

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…

more

user intervention is required to restart the device and restore Bluetooth communication.

CWE(s)
CWE-667

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

actions-semi
ats2819p firmware
all versions
actions-semi
ats2815 firmware
all versions
actions-semi
ats2819 firmware
all versions
actions-semi
ats2819s firmware
all versions
actions-semi
ats2819t firmware
all versions

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References