CVE-2021-30519 : Exploit Details and Defense Strategies

This article provides an overview of CVE-2021-30519, a vulnerability in Google Chrome that could allow an attacker to exploit heap corruption through a crafted HTML page.

Understanding CVE-2021-30519

In Google Chrome prior to version 90.0.4430.212, a vulnerability known as CVE-2021-30519 existed, which could be exploited by an attacker to potentially corrupt the heap memory through a malicious payments app.

What is CVE-2021-30519?

CVE-2021-30519 is a 'Use after free' vulnerability in the Payments feature of Google Chrome, allowing an attacker to target users with a malicious payments app and trigger heap corruption via a specially crafted HTML page.

The Impact of CVE-2021-30519

The impact of this vulnerability could lead to heap corruption and potentially allow an attacker to execute arbitrary code on the victim's system, compromising user data and system integrity.

Technical Details of CVE-2021-30519

Below are the technical details regarding CVE-2021-30519:

Vulnerability Description

The vulnerability involves a use-after-free issue in the Payments component of Google Chrome, enabling an attacker to exploit heap corruption.

Affected Systems and Versions

Google Chrome versions prior to 90.0.4430.212 are affected by this vulnerability. Users with outdated versions are at risk of exploitation.

Exploitation Mechanism

Attackers can exploit this vulnerability by convincing users to install a malicious payments app and visit a specially crafted HTML page, triggering the heap corruption.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-30519, users and organizations should take the following steps:

Immediate Steps to Take

Update Google Chrome to version 90.0.4430.212 or later to address the vulnerability.
Avoid clicking on suspicious links or installing untrusted applications that may contain malicious code.

Long-Term Security Practices

Regularly update software and applications to the latest versions to patch known vulnerabilities.
Educate users about the importance of cybersecurity hygiene and safe browsing practices.

Patching and Updates

Stay informed about security advisories from Google Chrome and other software vendors to promptly apply patches and updates that address known vulnerabilities.