CVE-2021-39746 Explained : Impact and Mitigation

This article provides details about CVE-2021-39746, a vulnerability in Android-12L that could lead to a local escalation of privilege.

Understanding CVE-2021-39746

CVE-2021-39746 is a vulnerability in Android-12L that allows the deletion of local files through an unsafe PendingIntent, potentially leading to a local escalation of privilege.

What is CVE-2021-39746?

In PermissionController of Android-12L, an attacker could exploit an unsafe PendingIntent to delete local files, enabling them to escalate privilege locally without requiring user interaction.

The Impact of CVE-2021-39746

This vulnerability could allow an attacker to gain elevated privileges locally without user interaction, posing a risk of unauthorized access and potential data manipulation.

Technical Details of CVE-2021-39746

This section covers the technical aspects of CVE-2021-39746.

Vulnerability Description

Type: Elevation of privilege
Description: Unsafe PendingIntent in PermissionController allows deletion of local files

Affected Systems and Versions

Product: Android
Version: Android-12L

Exploitation Mechanism

The vulnerability can be exploited through an unsafe PendingIntent in PermissionController, enabling an attacker to delete local files.

Mitigation and Prevention

Learn how to address CVE-2021-39746.

Immediate Steps to Take

Apply security patches from the vendor
Monitor system logs for any suspicious activities
Limit app installation to trusted sources

Long-Term Security Practices

Educate users about safe app usage
Implement principle of least privilege
Regularly update and patch systems
Conduct security assessments and audits

Patching and Updates

Ensure timely installation of security patches provided by the Android vendor to mitigate the vulnerability.