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CVE-2020-26556

Date: May 24, 2021

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.

Severity Score

Related Resources (8)

https://www.bluetooth.com/learn-about-bluetooth/key-attributes/bluetooth-security/reporting-security/
https://people.canonical.com/~ubuntu-security/cve/CVE-2020-26556
https://access.redhat.com/security/cve/CVE-2020-26556
https://www.kb.cert.org/vuls/id/799380
https://nvd.nist.gov/vuln/detail/CVE-2020-26556
https://kb.cert.org/vuls/id/799380
https://security-tracker.debian.org/tracker/CVE-2020-26556
https://www.mend.io/vulnerability-database/CVE-2020-26556

Severity Score

Weakness Type (CWE)

Improper Restriction of Excessive Authentication Attempts

CWE-307

CVSS v3.1

Base Score:
Attack Vector (AV): ADJACENT_NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): ADJACENT
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): NONE
Availability (A): NONE
Additional information:

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