CVE-2021-0428 : Security Advisory and Response
Learn about CVE-2021-0428, an Android vulnerability in TelephonyManager.java that allows unauthorized access to sensitive information, posing a risk of local information disclosure.
CVE-2021-0428 is a vulnerability found in the Android operating system, specifically in TelephonyManager.java. This vulnerability can allow an attacker to read a trackable identifier without the necessary permission check, potentially leading to local information disclosure.
Understanding CVE-2021-0428
This section will cover details about the nature and impact of CVE-2021-0428.
What is CVE-2021-0428?
CVE-2021-0428 is classified as an information disclosure vulnerability in the Android operating system. It exists in the getSimSerialNumber function of TelephonyManager.java, where a missing permission check allows unauthorized access to sensitive information.
The Impact of CVE-2021-0428
The impact of this vulnerability is the potential disclosure of local information to an attacker. Although user execution privileges are required for exploitation, user interaction is not necessary, making it a concerning security risk.
Technical Details of CVE-2021-0428
In this section, we will delve deeper into the technical aspects of CVE-2021-0428.
Vulnerability Description
The vulnerability arises from a missing permission check in the getSimSerialNumber function of TelephonyManager.java, enabling unauthorized access to a trackable identifier.
Affected Systems and Versions
The affected product is Android, specifically version Android-10.
Exploitation Mechanism
To exploit CVE-2021-0428, an attacker with user execution privileges can leverage the vulnerability without requiring any user interaction.
Mitigation and Prevention
This section provides guidance on how to mitigate the risks posed by CVE-2021-0428.
Immediate Steps to Take
Users are advised to stay vigilant and apply relevant security patches issued by the Android platform to address this vulnerability promptly.
Long-Term Security Practices
Maintaining up-to-date security protocols, limiting unnecessary permissions, and staying informed about security advisories are essential for safeguarding against emerging threats.
Patching and Updates
Regularly updating the Android operating system and associated software is crucial to ensure protection against known security vulnerabilities.