CVE-2021-39784 : Exploit Details and Defense Strategies

CVE-2021-39784 relates to an elevation of privilege vulnerability in the Android platform that could potentially allow local escalation of privileges without the need for additional execution privileges.

Understanding CVE-2021-39784

This section provides insights into the vulnerability's nature and impact.

What is CVE-2021-39784?

The CVE-2021-39784 vulnerability resides in CellBroadcastReceiver in Android-12L, where a missing permission check could lead to the enablement of specific cellular features, enabling local privilege escalation.

The Impact of CVE-2021-39784

The exploitation of this vulnerability could result in local escalation of privilege, requiring no additional execution privileges and lacking the need for user interaction.

Technical Details of CVE-2021-39784

Delve into the specifics of the vulnerability with this section.

Vulnerability Description

The vulnerability in CellBroadcastReceiver allows for the activation of certain cellular functionalities via a missing permission check, potentially leading to local privilege escalation.

Affected Systems and Versions

Product: Android
Versions Affected: Android-12L

Exploitation Mechanism

The vulnerability can be exploited locally, enabling specific cellular features without the necessary permission checks.

Mitigation and Prevention

Learn about mitigation strategies and preventive measures for CVE-2021-39784.

Immediate Steps to Take

Regularly update the Android operating system to the latest version.
Stay informed about security bulletins and patches provided by the Android platform.

Long-Term Security Practices

Implement strict permission controls and access restrictions within the Android system.
Conduct routine security assessments and audits to detect and address vulnerabilities.

Patching and Updates

Ensure timely installation of security patches and updates released by Android to address the CVE-2021-39784 vulnerability.