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ID

VDE-2022-021

Published

2022-05-16 14:00 (CEST)

Last update

2022-05-16 16:16 (CEST)

Vendor(s)

Pepperl+Fuchs SE

Product(s)

Article No° Product Name Affected Version(s)
RSM-EX01B Product Family all versions

Summary

Critical vulnerabilities have been discovered in the utilized Bluetooth component.
For more information see: https://kb.cert.org/vuls/id/799380

Vulnerabilities



CVE-2020-26559
8.8
Severity
8.8 (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
Weakness
Incorrect Authorization (CWE-863)
Summary

Bluetooth Mesh Provisioning in the Bluetooth Mesh profile 1.0 and 1.0.1 may permit a nearby device (participating in the provisioning protocol) to identify the AuthValue used given the Provisioner’s public ...

Source
nvd.nist.gov 
CVE-2020-26560
8.1
Severity
8.1 (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N)
Weakness
Incorrect Authorization (CWE-863)
Summary

Bluetooth Mesh Provisioning in the Bluetooth Mesh profile 1.0 and 1.0.1 may permit a nearby device, reflecting the authentication evidence from a Provisioner, to complete authentication without possessing the AuthValue, ...

Source
nvd.nist.gov 
CVE-2020-26557
7.5
Severity
7.5 (CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)
Weakness
Incorrect Authorization (CWE-863)
Summary

Mesh Provisioning in the Bluetooth Mesh profile 1.0 and 1.0.1 may permit a nearby device (without possession of the AuthValue used in the provisioning protocol) to determine the AuthValue via ...

Source
nvd.nist.gov 
CVE-2020-26556
7.5
Severity
7.5 (CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)
Weakness
Improper Restriction of Excessive Authentication Attempts (CWE-307)
Summary

Mesh Provisioning in the Bluetooth Mesh profile 1.0 and 1.0.1 may permit a nearby device, able to conduct a successful brute-force attack on an insufficiently random AuthValue before the provisioning ...

Source
nvd.nist.gov 
CVE-2020-26555
5.4
Severity
5.4 (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N)
Weakness
Incorrect Authorization (CWE-863)
Summary

Bluetooth legacy BR/EDR PIN code pairing in Bluetooth Core Specification 1.0B through 5.2 may permit an unauthenticated nearby device to spoof the BD_ADDR of the peer device to complete pairing ...

Source
nvd.nist.gov 
CVE-2020-26558
4.2
Severity
4.2 (CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N)
Weakness
Improper Authentication (CWE-287)
Summary

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 ...

Source
nvd.nist.gov 

Impact

Pepperl+Fuchs analyzed and identified affected devices.

An unauthorized attacker could gain access to the audio communication and listen to the conversation via Bluetooth.
This attack can only be carried out at close range and is limited by the radio range of Bluetooth.

The impact of the vulnerabilities on the affected device may result in

  • information disclosure

Solution

The device will play a confirmation sound when a Bluetooth connection is successfully established and a status LED labeled BT indicates that a Bluetooth connection is active.
This can be used to detect an unauthenticated connection.

Reported by

Pepperl+Fuchs
Coordinated by CERT@VDE