title: Bluetooth devices supporting BR/EDR v5.2 and earlier are vulnerable to impersonation attacks
description: 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.
problem types: CWE-757 Selection of Less-Secure Algorithm During Negotiation ('Algorithm Downgrade')
affected:
{
product: BR/EDR
vendor: Bluetooth
versions:
lessThanOrEqual: 5.2, status: affected, version: 5.2, versionType: custom
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: ADJACENT_NETWORK
availabilityImpact: NONE
baseScore: 5.4
baseSeverity: MEDIUM
confidentialityImpact: LOW
integrityImpact: LOW
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
version: 3.1
]