CVE-2021-21143 : Security Advisory and Response
Learn about CVE-2021-21143, a heap buffer overflow vulnerability in Google Chrome prior to 88.0.4324.146, allowing attackers to exploit heap corruption via malicious extensions.
Heap buffer overflow in Extensions in Google Chrome prior to 88.0.4324.146 allowed an attacker who convinced a user to install a malicious extension to potentially exploit heap corruption via a crafted Chrome Extension.
Understanding CVE-2021-21143
This CVE highlights a heap buffer overflow vulnerability in Google Chrome that could be exploited by a malicious actor to compromise a user's system.
What is CVE-2021-21143?
CVE-2021-21143 is a security vulnerability in Google Chrome that exists in the Extensions component, allowing an attacker to trigger heap corruption by persuading a user to install a specially crafted malicious extension.
The Impact of CVE-2021-21143
The impact of this vulnerability is significant as it can be exploited by attackers to execute arbitrary code, leading to potential system compromise and unauthorized access to sensitive information.
Technical Details of CVE-2021-21143
This section provides detailed technical information about the vulnerability.
Vulnerability Description
The vulnerability involves a heap buffer overflow in the Extensions component of Google Chrome, enabling attackers to exploit heap corruption through a malicious extension installation.
Affected Systems and Versions
Google Chrome versions prior to 88.0.4324.146 are affected by this vulnerability, making users of these versions susceptible to exploitation.
Exploitation Mechanism
Attackers can exploit this vulnerability by convincing users to install a specially crafted malicious extension, triggering heap corruption within Chrome.
Mitigation and Prevention
To protect systems from CVE-2021-21143, immediate action and long-term security practices are necessary.
Immediate Steps to Take
Users should update Google Chrome to version 88.0.4324.146 or later to mitigate the vulnerability. Additionally, refrain from installing extensions from untrusted sources.
Long-Term Security Practices
Adopting a proactive approach to cybersecurity, such as regular software updates, security awareness training, and implementing access controls, can enhance overall security posture.
Patching and Updates
Regularly check for security updates and patches released by Google Chrome to address known vulnerabilities like CVE-2021-21143.