CVE-2021-30540 : What You Need to Know

This article discusses the CVE-2021-30540 vulnerability found in Google Chrome on Android versions prior to 91.0.4472.77, allowing a remote attacker to perform domain spoofing through a crafted HTML page.

Understanding CVE-2021-30540

CVE-2021-30540 involves an incorrect security UI issue in Google Chrome that exposes users to domain spoofing attacks.

What is CVE-2021-30540?

The vulnerability in Google Chrome's security UI in payments on Android platforms before version 91.0.4472.77 enables malicious actors to deceive users by spoofing domains using specially created HTML pages.

The Impact of CVE-2021-30540

This security flaw poses a risk to Chrome users as it can lead to domain spoofing, making users susceptible to phishing attacks and potential fraud.

Technical Details of CVE-2021-30540

The technical aspects of CVE-2021-30540 cover the vulnerability description, affected systems and versions, and exploitation mechanism.

Vulnerability Description

The vulnerability stems from an incorrect security UI implementation in Google Chrome, which fails to properly validate payment-related domain information, leading to spoofing.

Affected Systems and Versions

Google Chrome versions running on Android platforms that are below 91.0.4472.77 are vulnerable to this issue.

Exploitation Mechanism

A remote attacker can exploit this vulnerability by creating a malicious HTML page designed to deceive users into thinking they are interacting with a legitimate payment interface.

Mitigation and Prevention

To secure systems and prevent exploitation of CVE-2021-30540, users and organizations must take immediate and long-term security measures.

Immediate Steps to Take

Users should update their Google Chrome browser to version 91.0.4472.77 or newer to patch the vulnerability and protect against domain spoofing attacks.

Long-Term Security Practices

Implementing strong security awareness training, avoiding suspicious websites, and practicing safe browsing habits can help prevent falling victim to similar vulnerabilities in the future.

Patching and Updates

Regularly updating software, especially browsers and security patches, is crucial to staying protected from known vulnerabilities and emerging threats.