CVE-2021-31612 Denial of service in n/a

Medium 6.5 Published 7 Sep 2021 Updated 3 Aug 2024

Attackers in radio range can trigger a deadlock on Zhuhai Jieli AC690X devices by sending oversized LMP packets, causing a denial of 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-2021-31612?

CVE-2021-31612 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 Zhuhai Jieli AC690X devices does not properly handle the reception of an oversized LMP packet greater than 17 bytes during the LMP auto rate procedure, allowing attackers in radio range to trigger a deadlock via a crafted LMP packet.

Which versions are affected by CVE-2021-31612?

It affects 12 products.

Products include Zh-Jieli Ac6901 Firmware, Zh-Jieli Ac6902 Firmware, Zh-Jieli Ac6903 Firmware, Zh-Jieli Ac6904 Firmware, Zh-Jieli Ac6905 Firmware, Zh-Jieli Ac6907 Firmware and 6 more.

How do I fix CVE-2021-31612?

No fix has been published for CVE-2021-31612 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-2021-31612 being exploited?

There is no known exploitation of CVE-2021-31612 in the wild and no public exploit code.

Sources

Also known as GHSA-x3mf-x7jh-9gfw.