CVE-2021-0653 : Security Advisory and Response
Learn about CVE-2021-0653, a critical vulnerability in Android versions 9, 10, and 11 that allows local information disclosure. Understand the impact, technical details, and mitigation steps.
A vulnerability was discovered in Android versions 9, 10, and 11, allowing for local information disclosure without requiring additional execution privileges. This issue arises from a missing permission check in enqueueNotification of NetworkPolicyManagerService.java, potentially leading to the exposure of sensitive information.
Understanding CVE-2021-0653
This section delves into the details of CVE-2021-0653, outlining the vulnerability, its impacts, technical aspects, and mitigation strategies.
What is CVE-2021-0653?
The vulnerability in Android's NetworkPolicyManagerService.java allows malicious actors to retrieve a trackable identifier, leading to local information disclosure.
The Impact of CVE-2021-0653
The vulnerability poses a risk of exposing sensitive local information without requiring user interaction or additional execution privileges.
Technical Details of CVE-2021-0653
Let's explore the specific technical aspects of CVE-2021-0653 to understand how it affects systems and what measures can be taken to mitigate the risk.
Vulnerability Description
The issue arises from a missing permission check in the enqueueNotification function, enabling unauthorized access to sensitive information.
Affected Systems and Versions
Android versions 9, 10, and 11 are affected by this vulnerability, potentially impacting a significant number of devices.
Exploitation Mechanism
Malicious actors can exploit this vulnerability to retrieve a trackable identifier, leading to the disclosure of local information.
Mitigation and Prevention
To address CVE-2021-0653 and prevent exploitation, immediate steps should be taken while ensuring long-term security practices are in place.
Immediate Steps to Take
Users should apply security patches released by Android to mitigate the risk of local information disclosure.
Long-Term Security Practices
Implementing robust security protocols, regular system updates, and security awareness training can help prevent similar vulnerabilities in the future.
Patching and Updates
Regularly check for security updates from Android and apply patches promptly to safeguard systems against potential threats.