What is CVE-2020-26556?

CVE-2020-26556 is a vulnerability in the Bluetooth Mesh profile 1.0 and 1.0.1 that allows a nearby device to complete authentication through a brute-force attack on an insufficiently random AuthValue.

How does CVE-2020-26556 affect Bluetooth devices?

CVE-2020-26556 affects Bluetooth devices that use the Mesh profile 1.0 and 1.0.1, allowing a nearby device to potentially compromise the authentication process.

What is the severity of CVE-2020-26556?

CVE-2020-26556 has a severity rating of 7.5 (high).

How can I fix CVE-2020-26556?

To mitigate CVE-2020-26556, it is recommended to update the affected Bluetooth devices to a version that addresses this vulnerability.

Where can I find more information about CVE-2020-26556?

You can find more information about CVE-2020-26556 from the CERT/CC vulnerability note at https://kb.cert.org/vuls/id/799380 and the Bluetooth website at https://www.bluetooth.com/learn-about-bluetooth/key-attributes/bluetooth-security/reporting-security/.

Vulnerability/
CVE-2020-26556

high

7.5

CWE

307

24/5/2021

4/8/2024

CVE-2020-26556

First published: Mon May 24 2021(Updated: )

Mesh Provisioning in the Bluetooth Mesh profile 1.0 and 1.0.1 may permit a nearby device, able to conduct a successful brute-force attack on an insufficiently random AuthValue before the provisioning procedure times out, to complete authentication by leveraging Malleable Commitment.

Credit: cve@mitre.org

Affected Software	Affected Version	How to fix
Bluetooth Bluetooth Core Specification	>=1.0b<=5.2
Bluetooth Mesh profile	=1.0.0
Bluetooth Mesh profile	=1.0.1

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Frequently Asked Questions

What is CVE-2020-26556?
CVE-2020-26556 is a vulnerability in the Bluetooth Mesh profile 1.0 and 1.0.1 that allows a nearby device to complete authentication through a brute-force attack on an insufficiently random AuthValue.
How does CVE-2020-26556 affect Bluetooth devices?
CVE-2020-26556 affects Bluetooth devices that use the Mesh profile 1.0 and 1.0.1, allowing a nearby device to potentially compromise the authentication process.
What is the severity of CVE-2020-26556?
CVE-2020-26556 has a severity rating of 7.5 (high).
How can I fix CVE-2020-26556?
To mitigate CVE-2020-26556, it is recommended to update the affected Bluetooth devices to a version that addresses this vulnerability.
Where can I find more information about CVE-2020-26556?
You can find more information about CVE-2020-26556 from the CERT/CC vulnerability note at https://kb.cert.org/vuls/id/799380 and the Bluetooth website at https://www.bluetooth.com/learn-about-bluetooth/key-attributes/bluetooth-security/reporting-security/.

collector/nvd-index
agent/severity
agent/weakness
agent/author
agent/references
agent/type
agent/event
agent/description
agent/last-modified-date
agent/first-publish-date
agent/softwarecombine
agent/tags
collector/mitre-cve
source/MITRE
vendor/bluetooth
canonical/bluetooth bluetooth core specification
version/bluetooth bluetooth core specification/1.0b
version/bluetooth bluetooth core specification/5.2
canonical/bluetooth mesh profile
version/bluetooth mesh profile/1.0.0
version/bluetooth mesh profile/1.0.1

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