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ID

VDE-2023-014

Published

2023-07-31 09:00 (CEST)

Last update

2023-07-28 09:56 (CEST)

Vendor(s)

WAGO GmbH & Co. KG

Product(s)

Article No┬░ Product Name Affected Version(s)
758-918 WAGO WLAN ETHERNET Gateway all versions
758-918/0000-0001 WAGO WLAN ETHERNET Gateway all versions

Summary

A vulnerability allows Bluetooth LE pairing traffic to be sniffed and used to bypass authentication for pairing.


Last Update:

July 27, 2023, 2:50 p.m.

Weakness

Authentication Bypass by Capture-replay  (CWE-294) 

Summary

Bluetooth® Low Energy Pairing in Bluetooth Core Specification v4.0 through v5.3 may permit an unauthenticated MITM to acquire credentials with two pairing devices via adjacent access when the MITM negotiates Legacy Passkey Pairing with the pairing Initiator and Secure Connections Passkey Pairing with the pairing Responder and brute forces the Passkey entered by the user into the Initiator. The MITM attacker can use the identified Passkey value to complete authentication with the Responder via Bluetooth pairing method confusion.


Impact

An unauthenticated attacker can acquire the pairing credentials to authenticate itself to an affected Bluetooth Low Energy device in order to use it. The Attack Complexity is high, the attacker must be adjacent to the network and the attacker must interact with the devices to make use of vulnerability.

Additional resources:

• HMS Security Advisory HMSSAR-2023-05-02-001

Solution

Mitigation

Disable Bluetooth LE if not used.

Remediation

No firmware update will be released to fix this issue.

Reported by

CERT@VDE coordinated with WAGO.