CVE-2021-0521 Explained : Impact and Mitigation
Learn about CVE-2021-0521, an information disclosure vulnerability in Android OS, impacting versions 8.1, 9, 10, and 11. Find out how to mitigate risks and secure your device.
Android operating system is affected by an information disclosure vulnerability (CVE-2021-0521) that allows local information disclosure of cross-user permissions without requiring additional execution privileges. This vulnerability exists in getAllPackages of PackageManagerService due to a missing permission check.
Understanding CVE-2021-0521
This CVE (CVE-2021-0521) impacts various versions of Android, including Android-11, Android-8.1, Android-9, and Android-10. The vulnerability can be exploited without user interaction.
What is CVE-2021-0521?
CVE-2021-0521 is an information disclosure vulnerability in the Android operating system. It allows an attacker to disclose local information across user permissions by exploiting a missing permission check in PackageManagerService's getAllPackages.
The Impact of CVE-2021-0521
The vulnerability could result in the exposure of sensitive information stored on an Android device to malicious actors. It poses a risk of unauthorized access to user data and compromises user privacy.
Technical Details of CVE-2021-0521
The technical details of CVE-2021-0521 include:
Vulnerability Description
The vulnerability in getAllPackages of PackageManagerService leads to information disclosure of cross-user permissions due to the absence of a permission check, allowing attackers to access sensitive data.
Affected Systems and Versions
Android versions affected by CVE-2021-0521 include Android-11, Android-8.1, Android-9, and Android-10.
Exploitation Mechanism
The exploitation of this vulnerability does not require any user interaction, making it easier for attackers to access and exploit the information.
Mitigation and Prevention
To mitigate the risks associated with CVE-2021-0521, follow these steps:
Immediate Steps to Take
Implement security updates provided by Android to patch the vulnerability. Regularly check for system updates and apply them promptly.
Long-Term Security Practices
Maintain good security practices, such as avoiding suspicious links or downloads, using strong passwords, and being cautious of app permissions.
Patching and Updates
Ensure that your Android device is up to date with the latest security patches to protect against potential cyber threats.