CVE-2021-0894 : Exploit Details and Defense Strategies

Android devices using MediaTek chipsets are susceptible to a critical vulnerability known as CVE-2021-0894. This vulnerability can be exploited for local escalation of privileges without requiring user interaction.

Understanding CVE-2021-0894

This CVE affects a range of MediaTek chipsets and versions of the Android operating system.

What is CVE-2021-0894?

CVE-2021-0894 is a vulnerability in apusys that allows an out-of-bounds write due to a missing bounds check. An attacker could exploit this to gain system execution privileges locally.

The Impact of CVE-2021-0894

The impact of this vulnerability is the potential escalation of privileges, enabling an attacker to execute malicious code on affected devices without user interaction.

Technical Details of CVE-2021-0894

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability arises from a missing bounds check in apusys, leading to an out-of-bounds write that can be leveraged for privilege escalation.

Affected Systems and Versions

The vulnerability affects devices using MediaTek chipsets including MT6873, MT6875, MT6877, MT6883, MT6885, MT6889, MT6891, MT6893, MT8195, MT8791, MT8797 running Android versions 10.0, 11.0, and 12.0.

Exploitation Mechanism

Exploiting CVE-2021-0894 does not require user interaction, making it easier for threat actors to execute attacks.

Mitigation and Prevention

Addressing CVE-2021-0894 involves taking immediate steps and adopting long-term security practices.

Immediate Steps to Take

Users should apply patches provided by MediaTek to remediate the vulnerability. Patch ID: ALPS05672107; Issue ID: ALPS05672038.

Long-Term Security Practices

Regularly updating devices and staying informed about security bulletins is crucial to enhancing device security.

Patching and Updates

Keep devices up to date with the latest firmware releases from MediaTek to protect against known vulnerabilities.