CVE-2021-31612 : Vulnerability Insights and Analysis

A vulnerability has been identified in the Bluetooth Classic implementation on Zhuhai Jieli AC690X devices. Attackers in radio range can exploit this flaw to trigger a deadlock via a specially crafted LMP packet.

Understanding CVE-2021-31612

This section delves into the details of CVE-2021-31612.

What is CVE-2021-31612?

The Bluetooth Classic implementation on Zhuhai Jieli AC690X devices fails to handle oversized LMP packets correctly, allowing attackers within radio range to cause a deadlock using a malicious LMP packet.

The Impact of CVE-2021-31612

The vulnerability enables attackers to exploit the LMP auto rate procedure to trigger a deadlock, posing a security risk for affected devices.

Technical Details of CVE-2021-31612

Explore the technical aspects of CVE-2021-31612.

Vulnerability Description

The flaw arises from the improper handling of oversized LMP packets (>17 bytes) during the LMP auto rate procedure on Zhuhai Jieli AC690X devices.

Affected Systems and Versions

The Zhuhai Jieli AC690X devices are affected by this vulnerability, potentially impacting their Bluetooth Classic implementation.

Exploitation Mechanism

Attackers within radio range can exploit this vulnerability by sending a crafted LMP packet larger than 17 bytes, leading to a deadlock situation.

Mitigation and Prevention

Learn how to mitigate the risks associated with CVE-2021-31612.

Immediate Steps to Take

To address this issue, users should apply relevant security patches provided by the vendor and avoid connecting to untrusted Bluetooth devices.

Long-Term Security Practices

Implementing secure coding practices and regularly updating firmware can enhance the overall security posture of Bluetooth-enabled devices.

Patching and Updates

Stay informed about security updates released by Zhuhai Jieli for the AC690X devices to mitigate the risk of exploitation.