CVE-2021-0921 Explained : Impact and Mitigation
Learn about CVE-2021-0921, a privilege escalation vulnerability in Android-11 posing risks of local privilege escalation without additional execution privileges. Find mitigation steps here.
This CVE-2021-0921 article provides details about a vulnerability in Android-11 that could lead to privilege escalation without requiring additional execution privileges.
Understanding CVE-2021-0921
This section delves into the nature of CVE-2021-0921 and its impact on affected systems.
What is CVE-2021-0921?
CVE-2021-0921 is a vulnerability found in ParsingPackageImpl.java in Android-11, involving a potential mismatch in parcel serialization/deserialization due to inadequate input validation.
The Impact of CVE-2021-0921
The impact of this vulnerability includes the risk of local privilege escalation without the need for user interaction, posing a security threat to affected Android-11 devices.
Technical Details of CVE-2021-0921
This section outlines the specifics of the vulnerability, including affected systems, versions, and the exploitation mechanism.
Vulnerability Description
The vulnerability in ParsingPackageImpl.java could allow threat actors to exploit the parcel serialization/deserialization mismatch, leading to privilege escalation.
Affected Systems and Versions
Android-11 devices are affected by this vulnerability, potentially exposing them to local privilege escalation attacks.
Exploitation Mechanism
Threat actors can exploit the inadequate input validation in ParsingPackageImpl.java to escalate privileges locally without requiring additional execution privileges.
Mitigation and Prevention
In this section, you will find recommended steps to mitigate the risks associated with CVE-2021-0921 and prevent potential exploitation.
Immediate Steps to Take
Users and administrators are advised to apply security patches promptly, monitor for any unauthorized system changes, and ensure secure configuration settings.
Long-Term Security Practices
Implementing security best practices, such as regular security audits, network segmentation, and user awareness training, can enhance the long-term security posture of the affected systems.
Patching and Updates
Stay informed about security updates released by the vendor, apply patches as soon as they are available, and prioritize security measures to prevent exploitation of known vulnerabilities.