Vulnerability Details : CVE-2021-31785
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.
Vulnerability category: Denial of service
Products affected by CVE-2021-31785
- cpe:2.3:o:actions-semi:ats2819p_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:actions-semi:ats2815_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:actions-semi:ats2819_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:actions-semi:ats2819s_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:actions-semi:ats2819t_firmware:-:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-31785
0.10%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 41 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-31785
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
6.1
|
MEDIUM | AV:A/AC:L/Au:N/C:N/I:N/A:C |
6.5
|
6.9
|
NIST | |
|
6.5
|
MEDIUM | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
2.8
|
3.6
|
NIST |
CWE ids for CVE-2021-31785
-
The product does not properly acquire or release a lock on a resource, leading to unexpected resource state changes and behaviors.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-31785
-
https://launchstudio.bluetooth.com/ListingDetails/76427
Launch Studio - Listing DetailsThird Party Advisory
-
https://www.actions-semi.com/index.php?id=3581&siteId=4
Broken Link;Vendor Advisory
-
https://dl.packetstormsecurity.net/papers/general/braktooth.pdf
Technical Description;Third Party Advisory
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