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CVE-2021-21179 : Exploit Details and Defense Strategies

Learn about CVE-2021-21179, a critical Use after free vulnerability in Google Chrome on Linux versions earlier than 89.0.4389.72, allowing remote attackers to exploit heap corruption.

A detailed overview of CVE-2021-21179, a vulnerability in Google Chrome that allowed a remote attacker to potentially exploit heap corruption.

Understanding CVE-2021-21179

CVE-2021-21179 is a 'Use after free' vulnerability in Network Internals in Google Chrome on Linux versions prior to 89.0.4389.72, allowing a remote attacker to potentially exploit heap corruption via a crafted HTML page.

What is CVE-2021-21179?

CVE-2021-21179 is a security flaw in Google Chrome on Linux that enables a remote attacker to potentially exploit heap corruption by executing code using a crafted HTML page.

The Impact of CVE-2021-21179

The impact of this vulnerability is significant as it allows remote attackers to compromise the integrity and confidentiality of affected systems running Chrome on Linux versions prior to 89.0.4389.72.

Technical Details of CVE-2021-21179

This section provides technical details regarding the vulnerability, affected systems, and exploitation mechanism.

Vulnerability Description

The vulnerability arises from a 'Use after free' issue in Network Internals in Google Chrome, which can lead to heap corruption when triggered by a specially crafted HTML page.

Affected Systems and Versions

Google Chrome on Linux operating systems with versions earlier than 89.0.4389.72 are affected by CVE-2021-21179. Users of these versions are at risk of exploitation.

Exploitation Mechanism

Remote attackers can exploit this vulnerability by enticing users to visit a malicious website hosting a crafted HTML page, triggering the 'Use after free' issue in Chrome's Network Internals.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-21179, immediate action and long-term security practices are essential.

Immediate Steps to Take

Users should update their Chrome browser to version 89.0.4389.72 or higher immediately to prevent exploitation of this vulnerability.

Long-Term Security Practices

Adopting secure browsing habits, avoiding suspicious links, and keeping software updated are crucial in maintaining overall cybersecurity.

Patching and Updates

Regularly applying security patches and updates released by Google for Chrome is vital to address known vulnerabilities and strengthen system security.

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