Bluetooth devices supporting BR/EDR v5.2 and earlier are vulnerable to impersonation attacks
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.4epss 2.4%
exploitation probability
2.4%top 18% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Affected products
Bluetooth · BR/EDRReferences
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.htmlhttp://lists.opensuse.org/opensuse-security-announce/2020-08/msg00047.htmlhttp://packetstormsecurity.com/files/157922/Bluetooth-Impersonation-Attack-BIAS-Proof-Of-Concept.htmlhttp://seclists.org/fulldisclosure/2020/Jun/5https://francozappa.github.io/about-bias/https://kb.cert.org/vuls/id/647177/https://www.bluetooth.com/learn-about-bluetooth/bluetooth-technology/bluetooth-security/bias-vulnerability/