CVE-2021-31609 Denial of service in n/a
Attackers in radio range can crash Silicon Labs WT32i devices by sending oversized LMP packets, requiring a firmware upgrade to mitigate.
- 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-2021-31609?
CVE-2021-31609 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 in Silicon Labs iWRAP 6.3.0 and earlier does not properly handle the reception of an oversized LMP packet greater than 17 bytes, allowing attackers in radio range to trigger a crash in WT32i via a crafted LMP packet.
Which versions are affected by CVE-2021-31609?
It affects 1 product.
Products include Silabs Iwrap.
How do I fix CVE-2021-31609?
No fix has been published for CVE-2021-31609 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-2021-31609 being exploited?
There is no known exploitation of CVE-2021-31609 in the wild and no public exploit code.
Sources
Also known as GHSA-gjhp-fhfw-fvx3.