CVE-2021-21199 : Exploit Details and Defense Strategies

A detailed overview of CVE-2021-21199, a vulnerability in Google Chrome that allowed a remote attacker to potentially exploit heap corruption.

Understanding CVE-2021-21199

This section will cover what CVE-2021-21199 is and its impacts.

What is CVE-2021-21199?

CVE-2021-21199 refers to a use after free vulnerability in Aura in Google Chrome on Linux versions prior to 89.0.4389.114. This vulnerability could be exploited by a remote attacker who compromised the renderer process, potentially leading to heap corruption through a crafted HTML page.

The Impact of CVE-2021-21199

The impact of this vulnerability is significant as it allows attackers to execute arbitrary code, compromise user data, and potentially take control of affected systems.

Technical Details of CVE-2021-21199

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability stems from a use after free issue within the Aura component of Google Chrome, specifically affecting versions lower than 89.0.4389.114, allowing attackers to exploit heap corruption.

Affected Systems and Versions

Google Chrome on Linux systems prior to version 89.0.4389.114 is affected by this vulnerability.

Exploitation Mechanism

Remote attackers could exploit this vulnerability by compromising the renderer process and leveraging a crafted HTML page to trigger heap corruption.

Mitigation and Prevention

Outlined are the steps to mitigate the risks associated with CVE-2021-21199.

Immediate Steps to Take

Users should update Google Chrome to version 89.0.4389.114 or higher to prevent exploitation of this vulnerability. Additionally, exercise caution when browsing untrusted websites.

Long-Term Security Practices

Adopting good security practices such as regularly updating software, using reputable security solutions, and staying informed about potential vulnerabilities can help enhance long-term security.

Patching and Updates

Regularly check for updates from Google Chrome and apply patches promptly to ensure systems are protected from known vulnerabilities.