CVE-2021-0642 : Vulnerability Insights and Analysis

This article provides an in-depth look into CVE-2021-0642, a vulnerability found in the Android operating system that could potentially lead to local information disclosure without the need for additional execution privileges.

Understanding CVE-2021-0642

CVE-2021-0642 is a security vulnerability discovered in the Android operating system that allows for the retrieval of a trackable identifier without the necessary permissions, potentially resulting in local information disclosure.

What is CVE-2021-0642?

The vulnerability exists in the onResume function of VoicemailSettingsFragment.java in Android. Due to a missing permission check, an attacker could exploit this issue to disclose local information without requiring further execution privileges.

The Impact of CVE-2021-0642

Exploiting CVE-2021-0642 could lead to local information disclosure on affected Android devices, making sensitive data accessible without the need for advanced permissions or user interaction.

Technical Details of CVE-2021-0642

CVE-2021-0642 falls under the problem type of Information Disclosure.

Vulnerability Description

The vulnerability lies in the onResume function of VoicemailSettingsFragment.java in Android, where a missing permission check enables the retrieval of a trackable identifier, potentially facilitating local information disclosure.

Affected Systems and Versions

Product: Android Versions Affected: Android-10, Android-11, Android-8.1, Android-9

Exploitation Mechanism

The vulnerability can be exploited by malicious actors through the onResume function of VoicemailSettingsFragment.java in Android, allowing for the disclosure of local information without the need for additional execution privileges.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-0642, immediate action and long-term security practices are recommended.

Immediate Steps to Take

Users should apply security patches released by Android to address the vulnerability promptly. Additionally, exercise caution while granting permissions to apps that request sensitive information.

Long-Term Security Practices

Implement robust security measures, such as regularly updating the Android operating system, installing security software, and avoiding downloading apps from untrusted sources to enhance device security.

Patching and Updates

Stay informed about security bulletins from Android to ensure timely installation of patches and updates to safeguard against known vulnerabilities.