Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2020-26558

Severity CVSS v4.0:
Pending analysis
Type:
CWE-287 Authentication Issues
Publication date:
24/05/2021
Last modified:
04/11/2025

Description

Bluetooth LE and BR/EDR secure pairing in Bluetooth Core Specification 2.1 through 5.2 may permit a nearby man-in-the-middle attacker to identify the Passkey used during pairing (in the Passkey authentication procedure) by reflection of the public key and the authentication evidence of the initiating device, potentially permitting this attacker to complete authenticated pairing with the responding device using the correct Passkey for the pairing session. The attack methodology determines the Passkey value one bit at a time.

Impact

Vector 3.x
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N CVSS v3.1 Severity and Metrics:

Base Score: 4.20 MEDIUM
Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Attack Vector (AV): Adjacent
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): Low
Integrity (I): Low
Availability (A): None

Base Score 3.x
4.20
Severity 3.x
MEDIUM
Vector 2.0
AV:A/AC:M/Au:N/C:P/I:P/A:N CVSS v2.0 Severity and Metrics:

Base Score: 4.30 MEDIUM
Vector: AV:A/AC:M/Au:N/C:P/I:P/A:N

Attack Vector (AV): Adjacent
Attack Complexity (AC): Medium
Authentication (Au): None
Confidentiality (C): Physical
Integrity (I): Physical
Availability (A): None

Base Score 2.0
4.30
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:bluetooth:bluetooth_core_specification:*:*:*:*:*:*:*:* 2.1 (including) 5.2 (including)
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.13 (excluding)
cpe:2.3:o:intel:ax210_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:intel:ax210:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:ax201_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:intel:ax201:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:ax200_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:intel:ax200:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:ac_9560_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:intel:ac_9560:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:ac_9462_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:intel:ac_9462:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:ac_9461_firmware:-:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools