CVE-2022-21781 Explained : Impact and Mitigation

A vulnerability has been identified in MediaTek WLAN driver, potentially allowing an attacker to execute local escalation of privilege without requiring user interaction. Here's what you need to know about CVE-2022-21781.

Understanding CVE-2022-21781

This section provides insights into the nature and impact of the CVE-2022-21781 vulnerability.

What is CVE-2022-21781?

The CVE-2022-21781 vulnerability resides in the WLAN driver of MediaTek devices. It stems from a missing bounds check, which could be exploited for local privilege escalation.

The Impact of CVE-2022-21781

The vulnerability could enable an attacker to escalate privileges locally on affected devices without the need for user interaction. This poses a significant security risk to device integrity and user data.

Technical Details of CVE-2022-21781

Delve into the technical aspects of CVE-2022-21781 to understand its implications and potential risks involved.

Vulnerability Description

The vulnerability in the MediaTek WLAN driver allows for an out-of-bounds write, resulting from the absence of a crucial bounds check. Exploiting this flaw could grant unauthorized access with elevated privileges.

Affected Systems and Versions

Devices running MediaTek chipsets including MT6761, MT6779, MT6781, and others, with Android versions 11.0 and 12.0, are susceptible to CVE-2022-21781. It's crucial to identify and secure these systems promptly.

Exploitation Mechanism

Attackers can leverage the missing bounds check in the WLAN driver to trigger an out-of-bounds write, leading to local privilege escalation. By exploiting this flaw, threat actors can attain system execution privileges without user interaction.

Mitigation and Prevention

Learn about the necessary steps to mitigate the CVE-2022-21781 vulnerability and safeguard affected systems against potential exploitation.

Immediate Steps to Take

Immediately apply the provided patch ID ALPS06704526 to address the vulnerability in MediaTek WLAN driver. Timely patching is essential to prevent unauthorized privilege escalation.

Long-Term Security Practices

Implement robust security measures, such as regular security updates and vulnerability assessments, to bolster device security and prevent similar exploits in the future.

Patching and Updates

Stay informed about security patches and updates released by MediaTek to address vulnerabilities like CVE-2022-21781. Regularly update your devices to stay protected against evolving cyber threats.