CVE-2020-26558 : Security Advisory and Response

Bluetooth LE and BR/EDR secure pairing in Bluetooth Core Specification 2.1 through 5.2 may allow a nearby man-in-the-middle attacker to identify the Passkey used during pairing, potentially leading to authenticated pairing with the responding device.

Understanding CVE-2020-26558

This CVE involves a vulnerability in Bluetooth LE and BR/EDR secure pairing that could be exploited by a man-in-the-middle attacker.

What is CVE-2020-26558?

The vulnerability in Bluetooth Core Specification 2.1 through 5.2 enables a nearby attacker to determine the Passkey used during pairing, potentially allowing unauthorized authenticated pairing with the target device.

The Impact of CVE-2020-26558

The vulnerability could lead to unauthorized access to Bluetooth devices through the exploitation of the Passkey authentication procedure, compromising the security of the pairing process.

Technical Details of CVE-2020-26558

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The vulnerability allows a man-in-the-middle attacker to identify the Passkey used during Bluetooth pairing, potentially leading to unauthorized access to paired devices.

Affected Systems and Versions

Bluetooth Core Specification 2.1 through 5.2

Exploitation Mechanism

The attacker can identify the Passkey by reflecting the public key and authentication evidence of the initiating device, allowing them to complete authenticated pairing with the responding device.

Mitigation and Prevention

Protecting against and addressing the CVE vulnerability.

Immediate Steps to Take

Update Bluetooth devices to the latest firmware or software versions that address the vulnerability.
Avoid pairing devices in unsecured or public environments.
Monitor for any unauthorized pairing attempts or suspicious activities on Bluetooth devices.

Long-Term Security Practices

Implement strong encryption protocols for Bluetooth communications.
Regularly review and update Bluetooth security settings and configurations.

Patching and Updates

Apply security patches provided by Bluetooth device manufacturers to mitigate the vulnerability and enhance device security.