CVE-2021-0513 : Security Advisory and Response
Learn about CVE-2021-0513 impacting Android devices via a local privilege escalation flaw in NotificationManagerService.java, allowing attackers to bypass permissions.
Android devices are impacted by CVE-2021-0513, where a vulnerability exists in deleteNotificationChannel function of NotificationManagerService.java, leading to a potential permission bypass. This flaw can result in a local elevation of privilege without the need for user interaction.
Understanding CVE-2021-0513
This section delves into the details of the CVE-2021-0513 vulnerability.
What is CVE-2021-0513?
CVE-2021-0513 affects Android devices, specifically in the deleteNotificationChannel and related functions of NotificationManagerService.java. The vulnerability allows for a possible permission bypass due to insufficient state validation, enabling a local escalation of privilege.
The Impact of CVE-2021-0513
The exploitation of this vulnerability could lead to a local elevation of privilege on affected Android versions without requiring any additional execution privileges or user interaction.
Technical Details of CVE-2021-0513
Here, we explore the technical aspects of the CVE-2021-0513 vulnerability.
Vulnerability Description
The flaw in deleteNotificationChannel function of NotificationManagerService.java allows threat actors to bypass permissions and elevate their privilege locally on Android devices.
Affected Systems and Versions
Android devices running versions Android-9, Android-10, Android-11, and Android-8.1 are impacted by CVE-2021-0513.
Exploitation Mechanism
The vulnerability can be exploited by leveraging hidden services on the affected Android devices, without the need for any additional execution privileges.
Mitigation and Prevention
To safeguard against CVE-2021-0513, immediate action and long-term security practices are essential.
Immediate Steps to Take
Users are advised to stay updated on security bulletins and apply patches promptly to mitigate the risk posed by CVE-2021-0513.
Long-Term Security Practices
Implementing security best practices, such as restricting unnecessary permissions and regular security updates, can enhance the overall security posture of Android devices.
Patching and Updates
Regularly check for security updates provided by Android to address vulnerabilities like CVE-2021-0513.