CVE-2021-0656 Explained : Impact and Mitigation

Android devices using certain MediaTek processors are affected by a vulnerability that could allow local privilege escalation without user interaction. The issue arises from a memory corruption in the edma driver.

Understanding CVE-2021-0656

This CVE ID refers to a specific vulnerability identified in Android devices with MediaTek processors.

What is CVE-2021-0656?

The vulnerability in the edma driver can be exploited to achieve local privilege escalation without the need for user interaction.

The Impact of CVE-2021-0656

If successfully exploited, an attacker could gain elevated privileges on the affected system, potentially leading to unauthorized access and control.

Technical Details of CVE-2021-0656

This section delves into the specifics of the vulnerability related to CVE-2021-0656.

Vulnerability Description

The vulnerability is caused by a memory corruption issue due to a use after free scenario in the edma driver.

Affected Systems and Versions

Devices running MediaTek processors including MT6853, MT6853T, MT6873, MT6877, MT6883, MT6885, MT6889, MT6893, MT8195, MT8791, and MT8797 with Android 10.0 and 11.0 are affected.

Exploitation Mechanism

The vulnerability can be exploited locally to escalate privileges without the need for user interaction.

Mitigation and Prevention

In response to CVE-2021-0656, the following actions are recommended.

Immediate Steps to Take

Users are advised to apply relevant patches provided by the device manufacturers promptly.

Long-Term Security Practices

Regularly update devices with the latest security patches to mitigate the risk of exploitation.

Patching and Updates

Stay informed about security bulletins from MediaTek and other vendors for patches addressing CVE-2021-0656 vulnerabilities.