CVE-2021-0534 : Exploit Details and Defense Strategies

Android's DeviceAdminReceiver.java in Android-11 is affected by a vulnerability that could lead to a local escalation of privilege without requiring user interaction. This CVE has been identified as A-170639543.

Understanding CVE-2021-0534

This section delves into the details of CVE-2021-0534, highlighting its impact, technical aspects, and mitigation strategies.

What is CVE-2021-0534?

The vulnerability in the permission declarations of DeviceAdminReceiver.java in Android-11 could allow an attacker to exploit an insecure default value, resulting in a local escalation of privilege.

The Impact of CVE-2021-0534

The lack of broadcast protection in DeviceAdminReceiver.java can enable threat actors to elevate privileges locally without needing additional execution privileges, posing a significant security risk.

Technical Details of CVE-2021-0534

Explore the specifics of the CVE, including the vulnerability description, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

The flaw stems from a potential lack of broadcast protection in DeviceAdminReceiver.java, paving the way for local privilege escalation by malicious actors.

Affected Systems and Versions

Android-11 is the specific version impacted by CVE-2021-0534, making devices running this OS version vulnerable to privilege escalation attacks.

Exploitation Mechanism

Exploiting the default value vulnerability in DeviceAdminReceiver.java allows threat actors to escalate privileges locally, bypassing the need for user interaction.

Mitigation and Prevention

Learn about the immediate steps to secure systems, long-term security practices, and the importance of timely patching and updates.

Immediate Steps to Take

Device users and administrators should apply security patches promptly, monitor for any unusual activities, and restrict unnecessary permissions to mitigate the risk of exploitation.

Long-Term Security Practices

Incorporating secure coding practices, conducting regular security audits, and educating users about safe usage habits are crucial for maintaining robust security posture.

Patching and Updates

Regularly applying updates released by Android for DeviceAdminReceiver.java and the underlying OS is essential to address known vulnerabilities and bolster defense against potential exploits.