CVE-2021-39742 : Vulnerability Insights and Analysis
Learn about CVE-2021-39742, an information disclosure vulnerability in Android-12L Voicemail. Find out the impact, technical details, and mitigation steps.
This article provides details about CVE-2021-39742, a vulnerability in Android-12L related to information disclosure in the Voicemail feature.
Understanding CVE-2021-39742
CVE-2021-39742 is a security vulnerability in Android-12L that allows the retrieval of a trackable identifier in Voicemail due to a missing permission check. This could potentially result in local information disclosure without requiring additional execution privileges, with user interaction necessary for exploitation.
What is CVE-2021-39742?
The vulnerability in Android-12L, identified as CVE-2021-39742, stems from a flaw in the Voicemail feature that lacks proper permission validation, enabling the disclosure of a trackable identifier.
The Impact of CVE-2021-39742
The exploitation of this vulnerability could lead to local information disclosure without the need for additional privileges beyond user interaction.
Technical Details of CVE-2021-39742
This section delves into the specific technical aspects of CVE-2021-39742.
Vulnerability Description
The vulnerability allows attackers to retrieve a trackable identifier through the Voicemail feature due to the absence of a permission check.
Affected Systems and Versions
- Affected Product: Android
- Affected Version: Android-12L
Exploitation Mechanism
- Attackers can exploit this vulnerability by interacting with the Voicemail feature to retrieve the trackable identifier.
Mitigation and Prevention
Understanding how to mitigate and prevent the exploitation of CVE-2021-39742 is crucial.
Immediate Steps to Take
- Users should avoid interacting with suspicious Voicemail messages to prevent potential information disclosure.
- Regularly monitor official security bulletins and updates from Android.
Long-Term Security Practices
- Implement best practices for secure app usage and permissions management.
- Stay informed about security vulnerabilities and updates related to Android systems.
Patching and Updates
- Apply security patches and updates provided by Android promptly to address known vulnerabilities and strengthen system security.