CVE-2022-21756 Explained : Impact and Mitigation

This CVE-2022-21756 pertains to a vulnerability found in WLAN drivers of MediaTek devices that could potentially lead to local information disclosure without the need for user interaction. The issue arises due to an incorrect bounds check, allowing for an out-of-bounds read. It requires System execution privileges for exploitation.

Understanding CVE-2022-21756

CVE-2022-21756 is a security vulnerability identified in the WLAN driver of various MediaTek devices. The vulnerability could be exploited to disclose local information without user interaction, posing a risk to the security and privacy of affected devices.

What is CVE-2022-21756?

The vulnerability in the WLAN driver of MediaTek devices results from an improper bounds check, leading to an out-of-bounds read. This flaw could potentially allow threat actors to access sensitive information stored on the device.

The Impact of CVE-2022-21756

If successfully exploited, CVE-2022-21756 could result in the unauthorized disclosure of local information on the device. Attackers with malicious intent could leverage this vulnerability to gain access to critical data without the user's knowledge.

Technical Details of CVE-2022-21756

The following technical details outline the specific aspects of CVE-2022-21756:

Vulnerability Description

The vulnerability in MediaTek's WLAN driver stems from an incorrect bounds check, enabling an out-of-bounds read. This could potentially lead to the disclosure of local information without requiring user interaction.

Affected Systems and Versions

The affected products include a wide range of MediaTek devices running Android 11.0 and 12.0. Users of devices with these specifications are advised to take immediate action to mitigate the risk posed by this vulnerability.

Exploitation Mechanism

Exploiting CVE-2022-21756 does not require user interaction and is contingent upon the attacker having System execution privileges. By leveraging this vulnerability, threat actors could gain unauthorized access to sensitive information stored on the device.

Mitigation and Prevention

To mitigate the risks associated with CVE-2022-21756, users and organizations are advised to take the following steps:

Immediate Steps to Take

Apply the patch identified by Patch ID: ALPS06535950 to address the vulnerability in the WLAN driver.
Regularly update the MediaTek devices to ensure they are protected against known security vulnerabilities.

Long-Term Security Practices

Implement a proactive security posture by conducting regular security assessments and audits.
Educate users about the importance of security updates and best practices to prevent exploitation of vulnerabilities.

Patching and Updates

Stay informed about security bulletins and updates released by MediaTek to address known vulnerabilities promptly and effectively.