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CVE-2021-21172 : Vulnerability Insights and Analysis

Learn about CVE-2021-21172 involving insufficient policy enforcement in Google Chrome, allowing remote attackers to bypass filesystem restrictions. Find out the impact and mitigation steps.

A detailed overview of CVE-2021-21172, including its impact, technical details, and mitigation strategies.

Understanding CVE-2021-21172

This section covers essential information about CVE-2021-21172.

What is CVE-2021-21172?

CVE-2021-21172 involves insufficient policy enforcement in the File System API in Google Chrome on Windows versions prior to 89.0.4389.72. This vulnerability could permit a remote attacker to bypass filesystem restrictions through a specifically crafted HTML page.

The Impact of CVE-2021-21172

The vulnerability allows remote attackers to circumvent filesystem restrictions, potentially leading to unauthorized access to sensitive data or the execution of malicious code.

Technical Details of CVE-2021-21172

This section delves into the specific technical aspects of CVE-2021-21172.

Vulnerability Description

The identified flaw in Google Chrome prior to version 89.0.4389.72 enables threat actors to avoid filesystem restrictions by exploiting a loophole in the File System API.

Affected Systems and Versions

Google Chrome running on Windows systems with versions below 89.0.4389.72 is impacted by this vulnerability.

Exploitation Mechanism

Remote attackers can exploit this vulnerability by crafting a specific HTML page, allowing them to bypass filesystem limitations and potentially execute unauthorized operations.

Mitigation and Prevention

In this section, we discuss various mitigation strategies and best practices to address CVE-2021-21172.

Immediate Steps to Take

Users should promptly update Google Chrome to version 89.0.4389.72 or newer to mitigate the risk of exploitation.

Long-Term Security Practices

Implementing robust cybersecurity measures, such as regular software updates, employing security tools, and educating users on safe browsing practices, can enhance overall system security.

Patching and Updates

Stay informed about security patches and updates released by Google to address known vulnerabilities and bolster the security of your systems and data.

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