Improper Authentication Affecting bluez package, versions <5.53-0ubuntu3.2


Severity

Recommended
0.0
medium
0
10

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.07% (32nd percentile)

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  • Snyk IDSNYK-UBUNTU2004-BLUEZ-1297821
  • published16 Jun 2021
  • disclosed24 May 2021

Introduced: 24 May 2021

CVE-2020-26558  (opens in a new tab)
CWE-287  (opens in a new tab)

How to fix?

Upgrade Ubuntu:20.04 bluez to version 5.53-0ubuntu3.2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream bluez package and not the bluez package as distributed by Ubuntu. See How to fix? for Ubuntu:20.04 relevant fixed versions and status.

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.

CVSS Scores

version 3.1