CVE-2021-39810 : What You Need to Know

This CVE record discusses a security vulnerability in Google's Android operating system that could potentially allow an elevation of privilege.

Understanding CVE-2021-39810

This section provides insights into the nature of the CVE-2021-39810 vulnerability.

What is CVE-2021-39810?

The CVE-2021-39810 vulnerability relates to a flaw in the NFC (Near Field Communication) feature of Google's Android OS. It allows the setup of a default contactless payment app without user consent, leading to a local escalation of privilege without requiring additional execution privileges. Exploitation can occur without user interaction.

The Impact of CVE-2021-39810

In this section, we explore the implications of the CVE-2021-39810 vulnerability.

The vulnerability allows malicious actors to perform unauthorized setups of contactless payment apps, potentially leading to elevated privileges within the system. It could compromise the integrity and security of the affected Android devices.

Technical Details of CVE-2021-39810

This section delves into the technical aspects of the CVE-2021-39810 vulnerability.

Vulnerability Description

The CVE-2021-39810 vulnerability arises from a missing permission check in the NFC feature of Android, enabling the unauthorized setup of default contactless payment apps.

Affected Systems and Versions

Vendor: Google
Product: Android
Affected Version: 14

Exploitation Mechanism

The exploitation of CVE-2021-39810 involves:

Setting up a default contactless payment app without user consent
Leveraging the missing permission check in the NFC feature
Achieving a local escalation of privilege without additional execution privileges

Mitigation and Prevention

Learn how to mitigate the CVE-2021-39810 vulnerability.

Immediate Steps to Take

Disable NFC if not required
Apply security patches provided by Google
Monitor for any unusual activities related to contactless payments

Long-Term Security Practices

Regularly update the Android OS to the latest version
Educate users on the risks associated with NFC-related actions
Implement strong mobile device security protocols

Patching and Updates

Google may release security patches to address the CVE-2021-39810 vulnerability. Ensure prompt installation of these updates for enhanced device security.