CVE-2021-28155 : What You Need to Know

Bluetooth Classic implementation on JBL TUNE500BT devices exposes a vulnerability that allows attackers to trigger a denial of service by flooding the device with LMP Feature Response data.

Understanding CVE-2021-28155

This CVE highlights a critical security issue in the Bluetooth Classic implementation on JBL TUNE500BT devices that can lead to a denial of service attack, enabling attackers in the radio range to shut down the target device.

What is CVE-2021-28155?

The vulnerability in the Bluetooth Classic implementation on JBL TUNE500BT devices allows attackers to exploit unsolicited LMP responses to flood the device with data, resulting in a denial of service condition.

The Impact of CVE-2021-28155

By triggering a denial of service attack and shutting down the target device, attackers can disrupt normal device functionality and potentially cause data loss or service interruption.

Technical Details of CVE-2021-28155

This section provides more insight into the specific technical aspects of the CVE.

Vulnerability Description

The vulnerability arises from the improper handling of continuous unsolicited LMP responses by the Bluetooth Classic implementation on JBL TUNE500BT devices.

Affected Systems and Versions

The issue impacts all versions of JBL TUNE500BT devices, exposing them to the risk of a denial of service attack when exploited by malicious actors within radio range.

Exploitation Mechanism

Attackers within radio range can exploit this vulnerability by flooding the target JBL TUNE500BT device with LMP Feature Response data, causing a shutdown and denial of service condition.

Mitigation and Prevention

Protecting against CVE-2021-28155 involves taking immediate action and implementing long-term security measures.

Immediate Steps to Take

Users are advised to be cautious of their device's surroundings to prevent unauthorized access and to avoid potential denial of service attacks.

Long-Term Security Practices

It is essential to keep Bluetooth-enabled devices up to date with the latest firmware and security patches to mitigate the risk of vulnerabilities being exploited.

Patching and Updates

Vendor patches and updates should be promptly applied to JBL TUNE500BT devices to address this vulnerability and enhance device security.