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CVE-2020-26557

Date: May 24, 2021

Mesh Provisioning in the Bluetooth Mesh profile 1.0 and 1.0.1 may permit a nearby device (without possession of the AuthValue used in the provisioning protocol) to determine the AuthValue via a brute-force attack (unless the AuthValue is sufficiently random and changed each time).

Severity Score

Related Resources (7)

https://www.bluetooth.com/learn-about-bluetooth/key-attributes/bluetooth-security/reporting-security/
https://people.canonical.com/~ubuntu-security/cve/CVE-2020-26557
https://access.redhat.com/security/cve/CVE-2020-26557
https://security-tracker.debian.org/tracker/CVE-2020-26557
https://nvd.nist.gov/vuln/detail/CVE-2020-26557
https://kb.cert.org/vuls/id/799380
https://www.mend.io/vulnerability-database/CVE-2020-26557

Severity Score

Weakness Type (CWE)

Improper Authentication

CWE-287

Incorrect Authorization

CWE-863

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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