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CVE-2021-21159 : Exploit Details and Defense Strategies

Learn about CVE-2021-21159, a heap buffer overflow flaw in Google Chrome pre-89.0.4389.72 allowing remote attackers to corrupt heap memory via crafted HTML pages. Find out impacts and mitigation.

A heap buffer overflow vulnerability in TabStrip in Google Chrome before version 89.0.4389.72 could allow a remote attacker to exploit heap corruption through a specifically crafted HTML page.

Understanding CVE-2021-21159

This section dives into the details of the CVE-2021-21159 vulnerability in Google Chrome.

What is CVE-2021-21159?

CVE-2021-21159 is a heap buffer overflow vulnerability identified in the TabStrip component of Chrome, occurring before version 89.0.4389.72. It enables a potential attacker to trigger heap corruption by using a malicious HTML page.

The Impact of CVE-2021-21159

The exploitation of this vulnerability could lead to arbitrary code execution, allowing the attacker to compromise the affected system and perform unauthorized actions.

Technical Details of CVE-2021-21159

In this section, the technical aspects of the CVE-2021-21159 vulnerability are discussed.

Vulnerability Description

The vulnerability involves a heap buffer overflow in the TabStrip feature of Google Chrome, presenting a critical security risk to affected systems.

Affected Systems and Versions

Google Chrome versions prior to 89.0.4389.72 are vulnerable to this exploit, putting users of these versions at risk of potential attacks.

Exploitation Mechanism

By enticing a user to visit a specially crafted HTML page, an attacker can trigger the heap buffer overflow, leading to heap corruption and potential exploitation.

Mitigation and Prevention

This section covers the measures to mitigate the CVE-2021-21159 vulnerability and prevent security breaches.

Immediate Steps to Take

Users are advised to update Google Chrome to version 89.0.4389.72 or later to address this vulnerability and enhance the security of their systems.

Long-Term Security Practices

Implementing secure browsing habits, avoiding suspicious websites, and keeping software up to date are essential for maintaining robust cybersecurity.

Patching and Updates

Regularly installing security patches and software updates provided by Google Chrome is crucial to defend against known vulnerabilities and emerging threats.

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