CVE-2020-26558

medium

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.

References

https://kb.cert.org/vuls/id/799380

https://www.bluetooth.com/learn-about-bluetooth/key-attributes/bluetooth-security/reporting-security/

https://lists.fedoraproject.org/archives/list/[email protected]/message/NSS6CTGE4UGTJLCOZOASDR3T3SLL6QJZ/

https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00520.html

https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00517.html

https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html

https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html

https://lists.debian.org/debian-lts-announce/2021/06/msg00022.html

https://www.debian.org/security/2021/dsa-4951

https://security.gentoo.org/glsa/202209-16

Details

Source: MITRE

Published: 2021-05-24

Updated: 2022-11-16

Type: CWE-287

Risk Information

CVSS v2

Base Score: 4.3

Vector: AV:A/AC:M/Au:N/C:P/I:P/A:N

Impact Score: 4.9

Exploitability Score: 5.5

Severity: MEDIUM

CVSS v3

Base Score: 4.2

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

Impact Score: 2.5

Exploitability Score: 1.6

Severity: MEDIUM