CVE-2021-0931 Explained : Impact and Mitigation

Android devices are affected by CVE-2021-0931, a vulnerability that allows the creation of misleading permission dialogs in the getAlias function of BluetoothDevice.java. This flaw could potentially lead to local information disclosure, requiring user interaction for exploitation.

Understanding CVE-2021-0931

This section delves into the details of the CVE-2021-0931 vulnerability, including its impact, technical aspects, and mitigation strategies.

What is CVE-2021-0931?

CVE-2021-0931 is an information disclosure vulnerability present in the getAlias function of BluetoothDevice.java on Android devices. It enables the generation of deceptive permission dialogs, leading to potential local information exposure.

The Impact of CVE-2021-0931

The impact of CVE-2021-0931 is significant as it allows threat actors to trick users into disclosing sensitive information by exploiting the missing data filtering in the BluetoothDevice.java function.

Technical Details of CVE-2021-0931

Understanding the technical aspects of the CVE-2021-0931 vulnerability is crucial for implementing effective security measures.

Vulnerability Description

The vulnerability arises from a lack of proper data filtering in the getAlias function of BluetoothDevice.java, allowing for the creation of misleading permission dialogs and subsequent information disclosure.

Affected Systems and Versions

Android versions 9, 10, 11, and 12 are impacted by CVE-2021-0931, making a wide range of devices vulnerable to potential information disclosure.

Exploitation Mechanism

Exploiting CVE-2021-0931 requires user interaction, specifically tricking users into disclosing sensitive information by misleading permission dialogs created through the vulnerability.

Mitigation and Prevention

Addressing CVE-2021-0931 requires immediate action and the adoption of long-term security practices to safeguard devices against such vulnerabilities.

Immediate Steps to Take

Users are advised to exercise caution when interacting with permission dialogs on Android devices to prevent falling victim to potential information disclosure attempts.

Long-Term Security Practices

Implementing robust data filtering mechanisms and raising awareness among users about the risks associated with deceptive permission dialogs are crucial for long-term security.

Patching and Updates

Regularly updating Android devices to the latest security patches and versions is essential in mitigating vulnerabilities like CVE-2021-0931 and enhancing overall device security.