CVE-2021-31615 Race condition in n/a

Medium 5.3 Published 25 Jun 2021 Updated 3 Aug 2024

An adjacent attacker can inject packets during Bluetooth Low Energy receive windows to achieve man-in-the-middle status or terminate links.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: Available

What is CVE-2021-31615?

CVE-2021-31615 is a medium-severity vulnerability in n/a, published on 25 Jun 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Unencrypted Bluetooth Low Energy baseband links in Bluetooth Core Specifications 4.0 through 5.2 may permit an adjacent device to inject a crafted packet during the receive window of the listening device before the transmitting device initiates its packet transmission to achieve full MITM status without terminating the link. When applied against devices establishing or using encrypted links, crafted packets may be used to terminate an existing link, but will not compromise the confidentiality or integrity of the link.

Weakness: CWE-362

Which versions are affected by CVE-2021-31615?

It affects 1 product.

Products include Bluetooth Bluetooth Core Specification.

How do I fix CVE-2021-31615?

Apply the vendor's patch.

Is CVE-2021-31615 being exploited?

There is no known exploitation of CVE-2021-31615 in the wild and no public exploit code.

Sources

Also known as GHSA-m25v-4656-g8pc, ROOT-OS-UBUNTU-2204-CVE-2021-31615, UBUNTU-CVE-2021-31615.