CVE-2021-0420 : What You Need to Know

Google Android has reported a CVE identified as CVE-2021-0420 concerning memory management driver issues in multiple MediaTek products. The vulnerability can result in a local denial of service attack without requiring additional execution privileges. Here is an analysis of the impact, technical details, and mitigation strategies for CVE-2021-0420.

Understanding CVE-2021-0420

This section provides insights into the nature and consequences of CVE-2021-0420.

What is CVE-2021-0420?

The vulnerability in the memory management driver could potentially lead to a system crash due to a missing bounds check, resulting in a local denial of service attack. Notably, no user interaction is necessary for its exploitation.

The Impact of CVE-2021-0420

The impact of this vulnerability is the risk of a local denial of service, which can disrupt the normal functionality of affected systems running Android 10.0 and 11.0. The vulnerability poses a threat without requiring any special user permissions.

Technical Details of CVE-2021-0420

This section delves into the technical aspects of CVE-2021-0420.

Vulnerability Description

The vulnerability is rooted in a missing bounds check within the memory management driver, enabling potential attackers to trigger a system crash and launch a local denial of service attack.

Affected Systems and Versions

The vulnerability affects a wide range of MediaTek products including MT6580, MT6599, MT6739, and more running Android 10.0 and 11.0.

Exploitation Mechanism

Exploiting this vulnerability does not require any user interaction, as the missing bounds check can be leveraged to cause a system crash and subsequently disrupt services.

Mitigation and Prevention

This section outlines the steps to mitigate and prevent the exploitation of CVE-2021-0420.

Immediate Steps to Take

Users and system administrators are advised to apply the provided patch ID (ALPS05403499) to address the vulnerability and prevent potential local denial of service attacks.

Long-Term Security Practices

Maintaining up-to-date security measures, monitoring for security bulletins, and promptly applying patches are essential for preventing similar vulnerabilities and enhancing overall system security.

Patching and Updates

Regularly updating the systems with the latest security patches and subscribing to security advisories from vendors can help in staying protected against security threats.