CVE-2020-26558
bluez - security update
4.2
MEDIUM
CVSS 3.1
EPSS 0.03%
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.
How to fix CVE-2020-26558
To remediate CVE-2020-26558, upgrade the affected package to a fixed version below.
- —upgrade to 5.55-3.1 or later
- —upgrade to 5.43-2+deb9u4 or later
- —upgrade to 5.50-1.2~deb10u2 or later
- —upgrade to 5.10.40-1 or later
Is CVE-2020-26558 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (4)
- from 0, < 5.55-3.1
- from 0, < 5.43-2+deb9u4
- from 0, < 5.50-1.2~deb10u2
- from 0, < 5.10.40-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM4.2 | CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N |