CVE-2021-0676 Explained : Impact and Mitigation

A vulnerability has been discovered in the geniezone driver of certain MediaTek processors, which could potentially lead to local information disclosure. This CVE requires system execution privileges without the need for user interaction.

Understanding CVE-2021-0676

This section will delve into the details of CVE-2021-0676.

What is CVE-2021-0676?

CVE-2021-0676 is a vulnerability found in the geniezone driver of various MediaTek processors. It stems from an incorrect bounds check, allowing for an out-of-bounds read that could result in local information disclosure.

The Impact of CVE-2021-0676

The impact of this CVE is significant as it could potentially expose sensitive information on affected devices. With the exploitation requiring system execution privileges, the risk of exposure is heightened.

Technical Details of CVE-2021-0676

In this section, we will explore the technical aspects of CVE-2021-0676.

Vulnerability Description

The vulnerability in the geniezone driver arises from an incorrect bounds check, enabling an out-of-bounds read. This flaw could be exploited to disclose local information without the need for user interaction.

Affected Systems and Versions

The following MediaTek processors are affected: MT6762, MT6765, MT6768, MT6769, MT6771, MT6779, MT6781, MT6785, MT6833, MT6853, MT6853T, MT6873, MT6875, MT6877, MT6883, MT6885, MT6889, MT6891, MT6893, MT8163, MT8167, MT8167S, MT8168, MT8173, MT8175, MT8183, MT8185, MT8195, MT8321, MT8362A, MT8365, MT8385, MT8735A, MT8735B, MT8765, MT8766, MT8768, MT8771, MT8786, MT8788, MT8789, MT8791, MT8797. The affected versions include Android 8.1, 9.0, 10.0, and 11.0.

Exploitation Mechanism

Exploiting this vulnerability does not require user interaction but necessitates system execution privileges. By leveraging the incorrect bounds check in the geniezone driver, an attacker could potentially obtain local information.

Mitigation and Prevention

Learn how to mitigate the risks associated with CVE-2021-0676.

Immediate Steps to Take

Immediate actions should include applying patches provided by MediaTek. It is crucial to keep software up to date to prevent exploitation of this vulnerability.

Long-Term Security Practices

Implementing robust security practices, such as regular security updates, network segmentation, and access control, can strengthen the overall security posture.

Patching and Updates

Stay informed about security bulletins and patches released by MediaTek for vulnerable processors and ensure timely implementation to mitigate the risks involved.