CVE-2021-4323 : Security Advisory and Response

A detailed overview of CVE-2021-4323 discussing the vulnerability, impact, technical details, and mitigation steps.

Understanding CVE-2021-4323

CVE-2021-4323 refers to a security issue in Google Chrome that allowed attackers to access local files through malicious extensions.

What is CVE-2021-4323?

The vulnerability in Google Chrome prior to version 90.0.4430.72 resulted from insufficient validation of untrusted input in Extensions, enabling attackers to exploit this flaw.

The Impact of CVE-2021-4323

With a severity rating of 'Medium', this vulnerability could be exploited by convincing users to install a malicious extension, leading to unauthorized access to local files.

Technical Details of CVE-2021-4323

Below are the technical specifics of CVE-2021-4323:

Vulnerability Description

The insufficient validation of untrusted input in Extensions in Google Chrome allowed attackers to access local files via a crafted Chrome Extension.

Affected Systems and Versions

Google Chrome versions prior to 90.0.4430.72 are affected by this vulnerability.

Exploitation Mechanism

Attackers could exploit this vulnerability by tricking users into installing a malicious extension, thereby gaining access to local files.

Mitigation and Prevention

Here are the steps to mitigate and prevent exploitation of CVE-2021-4323:

Immediate Steps to Take

Users should update Google Chrome to version 90.0.4430.72 or later to patch the vulnerability and prevent unauthorized access to local files.

Long-Term Security Practices

Ensure that users are cautious when installing browser extensions and verify the sources to prevent malicious extensions from being added.

Patching and Updates

Regularly update Google Chrome to the latest version to stay protected from known vulnerabilities.