CVE-2021-30897 : Vulnerability Insights and Analysis

This CVE-2021-30897 advisory addresses a vulnerability in macOS that allowed a malicious website to exfiltrate data cross-origin through the resource timing API. Apple has fixed this issue in macOS Monterey 12.0.1.

Understanding CVE-2021-30897

This section delves into the details of the CVE-2021-30897 vulnerability.

What is CVE-2021-30897?

CVE-2021-30897 is a security vulnerability in macOS that could be exploited by a malicious website to extract data cross-origin using the resource timing API.

The Impact of CVE-2021-30897

The impact of this vulnerability is that it could lead to unauthorized data access by malicious websites, potentially compromising user data and privacy.

Technical Details of CVE-2021-30897

In this section, we discuss the technical aspects of CVE-2021-30897.

Vulnerability Description

The vulnerability stemmed from a flaw in the resource timing API specification, which was subsequently updated and fixed in macOS Monterey 12.0.1.

Affected Systems and Versions

macOS versions earlier than 12.0 are affected by this vulnerability.

Exploitation Mechanism

The exploitation involves a malicious website leveraging the vulnerability in the resource timing API to extract sensitive data from a user's browser.

Mitigation and Prevention

This section provides guidance on how to mitigate and prevent exploitation of CVE-2021-30897.

Immediate Steps to Take

Users are advised to update their macOS to version 12.0.1 or higher to patch the vulnerability and prevent potential data exfiltration.

Long-Term Security Practices

In addition to updating the operating system, users should exercise caution when visiting websites and ensure they are from trusted sources.

Patching and Updates

Regularly check for system updates and security patches from Apple to stay protected against known vulnerabilities like CVE-2021-30897.