CVE-2021-0396 Explained : Impact and Mitigation

A vulnerability has been identified in Android's Builtins::Generate_ArgumentsAdaptorTrampoline function, potentially leading to remote code execution without user interaction.

Understanding CVE-2021-0396

This CVE refers to an out of bounds write issue in certain Android versions, allowing attackers to execute code remotely.

What is CVE-2021-0396?

The vulnerability exists in the builtins-arm.cc file, where an incorrect bounds check could enable remote code execution in Android 8.1, 9, 10, and 11.

The Impact of CVE-2021-0396

Exploitation can result in a remote attacker gaining control over an unprivileged process without any additional execution privileges.

Technical Details of CVE-2021-0396

The flaw originates from a lack of proper bounds validation in the Builtins::Generate_ArgumentsAdaptorTrampoline function.

Vulnerability Description

The vulnerability allows an out of bounds write, enabling remote code execution in affected Android versions.

Affected Systems and Versions

Android versions 8.1, 9, 10, and 11 are impacted by this vulnerability.

Exploitation Mechanism

Attackers can exploit this issue remotely without the need for user interaction.

Mitigation and Prevention

It is crucial to take immediate action and follow good security practices to mitigate the risks associated with CVE-2021-0396.

Immediate Steps to Take

Check for security updates from Android and apply patches promptly to protect systems from exploitation.

Long-Term Security Practices

Regularly update the Android operating system to ensure all security patches are up to date.

Patching and Updates

Stay informed about security bulletins and advisories from Android to address vulnerabilities promptly.