CVE-2021-39756 Explained : Impact and Mitigation

This CVE article provides details about a vulnerability in Android 12L that could lead to information disclosure without the need for user interaction.

Understanding CVE-2021-39756

This section delves into the specifics of the vulnerability and its potential impact.

What is CVE-2021-39756?

The vulnerability in Framework allows determining whether an app is installed without appropriate permissions, leading to local information disclosure without additional privileges.

The Impact of CVE-2021-39756

The vulnerability poses a risk of local information disclosure without requiring user interaction, making it a critical issue for Android 12L users.

Technical Details of CVE-2021-39756

Explore the technical aspects of the CVE to understand its implications better.

Vulnerability Description

The vulnerability in Framework exposes a method to check app installations without proper permissions, resulting in potential information exposure.

Affected Systems and Versions

Product: Android
Version: Android-12L

Exploitation Mechanism

The flaw allows exploiting side channel information disclosure, enabling threat actors to determine the presence of specific apps without user consent.

Mitigation and Prevention

Learn the steps to mitigate and prevent the exploitation of CVE-2021-39756.

Immediate Steps to Take

Update Android 12L to the latest patch provided by the vendor.
Avoid downloading apps from untrusted sources to minimize risks.

Long-Term Security Practices

Regularly check for security updates from Android to patch known vulnerabilities.
Implement app permission controls to restrict unauthorized information access.

Patching and Updates

Ensure timely patching of Android 12L to address the vulnerability and enhance the security posture of the system.