Legacy pairing and secure-connections pairing authentication in Bluetooth BR/EDR Core Specification v5.2 and earlier may allow an unauthenticated user to complete authentication without pairing credentials via adjacent access. An unauthenticated, adjacent attacker could impersonate a Bluetooth BR/EDR master or slave to pair with a previously paired remote device to successfully complete the authentication procedure without knowing the link key.
https://kb.cert.org/vuls/id/647177/
https://francozappa.github.io/about-bias/
http://seclists.org/fulldisclosure/2020/Jun/5
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.html
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00047.html
Source: MITRE
Published: 2020-05-19
Updated: 2021-12-21
Type: CWE-290
Base Score: 4.8
Vector: AV:A/AC:L/Au:N/C:P/I:P/A:N
Impact Score: 4.9
Exploitability Score: 6.5
Severity: MEDIUM
Base Score: 5.4
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Impact Score: 2.5
Exploitability Score: 2.8
Severity: MEDIUM