CVE-2021-0542 : Vulnerability Insights and Analysis

This article provides detailed information about CVE-2021-0542, a vulnerability in Android 11 that could lead to local information disclosure of paired Bluetooth addresses.

Understanding CVE-2021-0542

This section will cover what CVE-2021-0542 is and its potential impact.

What is CVE-2021-0542?

CVE-2021-0542 is a vulnerability found in Android 11 that results from a missing permission check in the updateNotification of BeamTransferManager.java. This flaw allows for local information disclosure of paired Bluetooth addresses without requiring additional execution privileges. Successful exploitation of this vulnerability requires user interaction.

The Impact of CVE-2021-0542

The vulnerability poses a risk of exposing sensitive information such as paired Bluetooth addresses on affected devices, potentially leading to privacy breaches and targeted attacks.

Technical Details of CVE-2021-0542

In this section, we will delve into the technical aspects of CVE-2021-0542, including the vulnerability description, affected systems, and exploitation mechanism.

Vulnerability Description

The vulnerability arises from a missing permission check in the updateNotification of BeamTransferManager.java, allowing unauthorized access to paired Bluetooth addresses on Android 11 devices.

Affected Systems and Versions

Android 11 is the affected version by CVE-2021-0542, leaving devices running this operating system vulnerable to the disclosed information.

Exploitation Mechanism

Exploiting CVE-2021-0542 would require an attacker to interact with the affected device, facilitating the disclosure of paired Bluetooth addresses.

Mitigation and Prevention

This section will outline the necessary steps to mitigate the risks associated with CVE-2021-0542 and prevent potential exploitation.

Immediate Steps to Take

Users are advised to update their Android 11 devices with the latest security patches and be cautious of unsolicited requests for Bluetooth pairing.

Long-Term Security Practices

Implementing secure Bluetooth pairing procedures and maintaining up-to-date security measures on devices can help in reducing the risk of information disclosure.

Patching and Updates

Regularly checking for and applying security updates released by Android for Android 11 devices is crucial in addressing CVE-2021-0542 and other potential vulnerabilities.