Improper Authentication in Bluetooth Mesh profile - CVE-2020-26556
Published: May 26, 2021 / Updated: January 26, 2022
Vulnerability identifier: #VU53581
CSH Severity: Low
CVSS v4: 2.4 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-26556
CWE-ID: CWE-287
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local attacker to bypass authentication process.
The vulnerability exists due to a flaw in the authentication protocol. An attacker with physical access can identify the AuthValue used before the provisioning procedure times out, complete the provisioning operation and obtain a NetKey.
Affected software
Bluetooth Mesh profile
ESP-IDF
ESP-IDF
How to mitigate CVE-2020-26556
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.
ESP-IDF - addressed in versions 3.3.6, 4.0.3