CVE-2021-0918 : Security Advisory and Response

Android devices running Android-12 are affected by CVE-2021-0918, a vulnerability that allows for remote code execution over Bluetooth without the need for user interaction. This could lead to serious security risks if exploited.

Understanding CVE-2021-0918

This section delves into the details of CVE-2021-0918, outlining its impact, technical aspects, and mitigation strategies.

What is CVE-2021-0918?

CVE-2021-0918 is a vulnerability found in the gatt_process_notification function of gatt_cl.cc in Android devices. It enables an attacker to perform an out-of-bounds write due to a missing bounds check. As a result, remote code execution over Bluetooth becomes possible without requiring any additional execution privileges or user interaction.

The Impact of CVE-2021-0918

The impact of CVE-2021-0918 is severe, as it allows threat actors to execute malicious code remotely via Bluetooth connections. This can compromise the security and privacy of affected Android devices and sensitive user data.

Technical Details of CVE-2021-0918

This section provides a deeper insight into the vulnerability, including its description, affected systems, and exploitation mechanism.

Vulnerability Description

The vulnerability in gatt_process_notification can be exploited for out-of-bounds write, paving the way for unauthorized remote code execution over Bluetooth on Android-12 devices.

Affected Systems and Versions

Android-12 devices are impacted by CVE-2021-0918, exposing them to the risks associated with remote code execution via Bluetooth connections.

Exploitation Mechanism

Attackers can exploit this vulnerability to trigger remote code execution over Bluetooth without needing any user interaction, posing a serious security threat.

Mitigation and Prevention

To protect Android devices from CVE-2021-0918, immediate actions and long-term security practices need to be implemented.

Immediate Steps to Take

Users should update their Android devices to the latest security patches provided by Google to mitigate the risk of exploitation through CVE-2021-0918.

Long-Term Security Practices

In addition to immediate updates, adopting security best practices such as using trusted Bluetooth connections and keeping software up to date can enhance overall device security.

Patching and Updates

Regularly checking for and applying security updates and patches released by Android can help prevent vulnerabilities like CVE-2021-0918 from being exploited.