Pairing in Bluetooth® Core v5.2 and earlier may permit an unauthenticated attacker to acquire credentials with two pairing devices via…
certcc·CWE-351·Published 2020-05-19
Pairing in Bluetooth® Core v5.2 and earlier may permit an unauthenticated attacker to acquire credentials with two pairing devices via adjacent access when the unauthenticated user initiates different pairing methods in each peer device and an end-user erroneously completes both pairing procedures with the MITM using the confirmation number of one peer as the passkey of the other. An adjacent, unauthenticated attacker could be able to initiate any Bluetooth operation on either attacked device exposed by the enabled Bluetooth profiles. This exposure may be limited when the user must authorize certain access explicitly, but so long as a user assumes that it is the intended remote device requesting permissions, device-local protections may be weakened.
Pairing in Bluetooth® Core v5.2 and earlier may permit an unauthenticated attacker to acquire credentials with two pairing devices via adjacent access when the unauthenticated user initiates different pairing methods in each peer device and an end-user erroneously completes both pairing procedures with the MITM using the confirmation number of one peer as the passkey of the other. An adjacent, unauthenticated attacker could be able to initiate any Bluetooth operation on either attacked device exposed by the enabled Bluetooth profiles. This exposure may be limited when the user must authorize certain access explicitly, but so long as a user assumes that it is the intended remote device requesting permissions, device-local protections may be weakened.
El emparejamiento en Bluetooth® Core versiones v5.2 y anteriores, puede permitir a un atacante no autenticado adquirir credenciales con dos dispositivos de emparejamiento mediante un acceso adyacente cuando un usuario no autenticado inicia diferentes métodos de emparejamiento en cada dispositivo homólogo y un usuario final completa erróneamente ambos procedimientos de emparejamiento con la técnica MITM usando el número de confirmación de un peer como clave de acceso del otro. Un atacante adyacente no autenticado podría ser capaz de iniciar cualquier operación de Bluetooth en cualquier dispositivo atacado expuesto por los perfiles de Bluetooth habilitados. Esta exposición puede estar limitada cuando el usuario debe autorizar determinado acceso explícitamente, pero siempre y cuando el usuario asuma que es el dispositivo remoto deseado que requiera permisos, las protecciones locales del dispositivo pueden estar debilitadas.
| Version | Type | Source | Base | Exp | Impact | Vector |
|---|---|---|---|---|---|---|
| 2.0 | Primary | NVD | 4.3 | 5.5 | 4.9 | AV:A/AC:M/Au:N/C:P/I:P/A:N |
| 3.1 | Primary | cve.org | 6.3 | — | — | CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N |
| 3.1 | Primary | cve.org | 6.3 | — | — | CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N |
| 3.1 | Primary | NVD | 6.3 | 2.1 | 4.2 | CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N |
| 3.1 | Secondary | NVD | 6.3 | 2.1 | 4.2 | CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N |