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Home - AdvisoriesPrint
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CERT-In Advisory CIAD-2020-0031

Bluetooth Impersonation Attacks (BIAS)

Original Issue Date: May 20, 2020

Severity Rating: Medium

Systems Affected

  • All Bluetooth devices supporting BR/EDR Core Configurations version 5.2 and prior

Overview

A vulnerability has been reported in Bluetooth protocol, which could be exploited by an adjacent attacker to perform a spoofing attack(BIAS) impersonating the address of a previously paired remote device.

Description

Bluetooth Basic Rate / Enhanced Data Rate (BR/EDR) Core Configurations are used for low-power short-range communications. To establish an encrypted connection, two Bluetooth devices must pair with each other using a link key.

An attacker with physical access to the Bluetooth connection could perform a spoofing attack impersonating the address of a previously paired remote device. This attack may result in the attacking device completing the authentication procedure successfully despite not possessing the link key.

This vulnerability in turn, could permit an attacker to initiate the Bluetooth Key Negotiation (KNOB) attack more efficiently, potentially gaining full access as the remote paired device.

Solution

It is highly recommended that the end users apply the latest update.
Bluetooth host and controller suppliers should refer to the Bluetooth SIG for guidance on updating their products.  
https://www.bluetooth.com/learn-about-bluetooth/bluetooth-technology/bluetooth-security/bias-vulnerability/

References

 
https://www.bluetooth.com/learn-about-bluetooth/bluetooth-technology/bluetooth-security/bias-vulnerability/
https://kb.cert.org/vuls/id/647177/
https://www.welivesecurity.com/2020/05/19/bluetooth-flaw-exposes-countless-devices-bias-attacks/

CVE Name
CVE-2020-10135

Disclaimer

The information provided herein is on "as is" basis, without warranty of any kind.

Contact Information

Email: info@cert-in.org.in
Phone: +91-11-24368572

Postal address

Indian Computer Emergency Response Team (CERT-In)
Ministry of Electronics and Information Technology
Government of India
Electronics Niketan
6, CGO Complex, Lodhi Road,
New Delhi - 110 003
India

 
Indian Computer Emergency Response Team - CERT-In, Ministry of Electronics and Information Technology, Government of India.
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