CVE-2021-39776 Explained : Impact and Mitigation

This CVE-2021-39776 article provides details about a vulnerability in Android-12L related to memory corruption in NFC leading to a potential privilege escalation.

Understanding CVE-2021-39776

CVE-2021-39776 is a vulnerability in Android-12L that can result in local privilege escalation without the need for user interaction.

What is CVE-2021-39776?

Type: Elevation of privilege
Description: In NFC, a memory corruption issue occurs due to a use after free, potentially allowing an attacker to escalate privileges locally.

The Impact of CVE-2021-39776

The vulnerability could lead to local escalation of privilege on devices running Android-12L without requiring user interaction.

Technical Details of CVE-2021-39776

This section provides more in-depth technical details of the CVE-2021-39776 vulnerability.

Vulnerability Description

The vulnerability stems from a memory corruption issue in NFC due to a use after free scenario on Android-12L.

Affected Systems and Versions

Product: Android
Version: Android-12L

Exploitation Mechanism

The vulnerability can be exploited to achieve local privilege escalation without the need for user interaction.

Mitigation and Prevention

Learn how to mitigate and prevent potential exploitation of CVE-2021-39776.

Immediate Steps to Take

Update Android-12L to the latest version.
Consider limiting NFC usage until a patch is applied.

Long-Term Security Practices

Regularly update Android devices to ensure security fixes are applied promptly.
Exercise caution while interacting with unknown or untrusted NFC devices.

Patching and Updates

Ensure timely installation of security patches and updates provided by Android to address CVE-2021-39776.