CVE-2021-0919 : Exploit Details and Defense Strategies

Android operating systems, specifically versions Android-10, Android-11, and Android-9, are susceptible to a local denial of service vulnerability due to an integer overflow. This flaw, identified as CVE-2021-0919, allows attackers to render the lockscreen unusable without requiring additional execution privileges. User interaction is necessary to exploit this vulnerability.

Understanding CVE-2021-0919

This section delves into the details of the CVE-2021-0919 vulnerability affecting Android versions 10, 11, and 9.

What is CVE-2021-0919?

CVE-2021-0919 is a denial of service vulnerability discovered in the Android operating system, specifically in the IServiceManager.cpp component. The flaw arises from an unhandled exception caused by an integer overflow, leading to the local denial of service.

The Impact of CVE-2021-0919

The vulnerability poses a risk of rendering the lockscreen of affected Android devices unusable, ultimately resulting in a local denial of service attack. Attackers can exploit this issue without the need for additional execution privileges.

Technical Details of CVE-2021-0919

Explore the technical aspects of the CVE-2021-0919 vulnerability to understand its implications better.

Vulnerability Description

The vulnerability in the getService of IServiceManager.cpp is attributed to an unhandled exception resulting from an integer overflow. This oversight enables attackers to trigger a local denial of service on Android devices running versions 10, 11, and 9.

Affected Systems and Versions

Android devices with versions 10, 11, and 9 are impacted by CVE-2021-0919, making them susceptible to the denial of service exploit.

Exploitation Mechanism

To exploit CVE-2021-0919 successfully, an attacker would need user interaction to carry out a local denial of service attack on the affected Android device.

Mitigation and Prevention

Learn how to address and prevent the CVE-2021-0919 vulnerability to enhance the security of Android devices.

Immediate Steps to Take

Users are encouraged to apply relevant security patches or updates provided by the device manufacturer to mitigate the risk posed by CVE-2021-0919.

Long-Term Security Practices

Implementing robust security measures, such as regularly updating the Android OS and practicing safe browsing habits, can help safeguard devices against potential vulnerabilities.

Patching and Updates

Stay informed about security advisories and updates from relevant sources, such as the official Android Security Bulletin, to ensure timely patching and protection against known vulnerabilities.