CVE-2020-26559 Auth bypass in n/a
A nearby attacker can bypass Bluetooth Mesh provisioning authentication by deriving the AuthValue, allowing unauthorized device provisioning.
- 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-2020-26559?
CVE-2020-26559 is a high-severity authentication bypass vulnerability in n/a, published on 24 May 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Bluetooth Mesh Provisioning in the Bluetooth Mesh profile 1.0 and 1.0.1 may permit a nearby device (participating in the provisioning protocol) to identify the AuthValue used given the Provisioner’s public key, and the confirmation number and nonce provided by the provisioning device. This could permit a device without the AuthValue to complete provisioning without brute-forcing the AuthValue.
Weakness: CWE-863
Which versions are affected by CVE-2020-26559?
It affects 1 product.
Products include Bluetooth Mesh Profile.
How do I fix CVE-2020-26559?
Apply the vendor's patch.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2020-26559 being exploited?
There is no known exploitation of CVE-2020-26559 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-wfh5-x68w-hvw2, ROOT-OS-UBUNTU-2204-CVE-2020-26559, UBUNTU-CVE-2020-26559.