CVE-2021-31785 Denial of service in n/a
Attackers in radio range can cause a deadlock in Actions Bluetooth chipsets via crafted LMP packets, requiring manual restart to restore service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-31785?
CVE-2021-31785 is a medium-severity denial of service vulnerability in n/a, published on 7 Sep 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-667
Which versions are affected by CVE-2021-31785?
It affects 5 products.
Products include Actions-Semi Ats2815 Firmware, Actions-Semi Ats2819 Firmware, Actions-Semi Ats2819p Firmware, Actions-Semi Ats2819s Firmware, Actions-Semi Ats2819t Firmware.
How do I fix CVE-2021-31785?
No fix has been published for CVE-2021-31785 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2021-31785 being exploited?
There is no known exploitation of CVE-2021-31785 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-8235-3268-fjf9.