CVE-2021-0477 : Vulnerability Insights and Analysis

This article provides an overview of CVE-2021-0477, a vulnerability found in Android that could lead to an elevation of privilege due to an unsafe PendingIntent.

Understanding CVE-2021-0477

CVE-2021-0477 is a security vulnerability discovered in Android that could potentially allow an attacker to bypass permissions and escalate their privileges locally without the need for user interaction.

What is CVE-2021-0477?

The vulnerability exists in notifyScreenshotError of ScreenshotNotificationsController.java within Android, where an unsafe PendingIntent could be exploited for privilege escalation, requiring User execution privileges.

The Impact of CVE-2021-0477

If successfully exploited, this vulnerability could lead to a local elevation of privilege, enabling attackers to gain unauthorized access and perform malicious actions on the affected system.

Technical Details of CVE-2021-0477

The technical details of CVE-2021-0477 include:

Vulnerability Description

The vulnerability arises from an unsafe PendingIntent in notifyScreenshotError of ScreenshotNotificationsController.java, allowing for a potential permission bypass.

Affected Systems and Versions

The affected products include Android versions 8.1, 9, 10, and 11.

Exploitation Mechanism

The exploitation of this vulnerability could result in a local escalation of privilege without requiring user interaction.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-0477, consider the following steps:

Immediate Steps to Take

Apply security patches provided by the official vendor.
Monitor for any unusual activities on the system.

Long-Term Security Practices

Regularly update the Android operating system to the latest version.
Implement security best practices to prevent privilege escalation attacks.

Patching and Updates

Stay informed about security bulletins and updates from the official Android website to ensure timely patching of known vulnerabilities.