CVE-2021-0536 Explained : Impact and Mitigation

Android 11's WiFiInstaller has a vulnerability (CVE-2021-0536) that allows deleting files accessible to CertInstaller, leading to local privilege escalation without additional execution privileges. No user interaction is required for exploitation.

Understanding CVE-2021-0536

This section delves into the details of the CVE-2021-0536 vulnerability.

What is CVE-2021-0536?

The vulnerability in dropFile of WiFiInstaller facilitates unauthorized deletion of files by CertInstaller, potentially enabling local privilege escalation on Android 11 devices.

The Impact of CVE-2021-0536

Exploiting this vulnerability could result in an attacker gaining elevated privileges on the affected Android device without needing user interaction.

Technical Details of CVE-2021-0536

This section discusses the technical aspects of CVE-2021-0536.

Vulnerability Description

The flaw allows CertInstaller to delete files accessible to it, leading to a confused deputy scenario and potential privilege escalation.

Affected Systems and Versions

The vulnerability affects Android 11 devices utilizing WiFiInstaller.

Exploitation Mechanism

Attackers can exploit this vulnerability to delete files accessible to CertInstaller, enabling them to escalate privileges locally.

Mitigation and Prevention

Learn about the steps to mitigate and prevent CVE-2021-0536.

Immediate Steps to Take

Users should apply relevant security patches provided by the vendor to mitigate the vulnerability's exploitation.

Long-Term Security Practices

Adopt a proactive approach by regularly updating devices and following security best practices to prevent similar vulnerabilities.

Patching and Updates

Stay informed about security updates from Android and promptly install patches to safeguard against CVE-2021-0536.