CVE-2021-30508 : Security Advisory and Response

Heap buffer overflow in Media Feeds in Google Chrome prior to 90.0.4430.212 allowed an attacker who convinced a user to enable certain features in Chrome to potentially exploit heap corruption via a crafted HTML page.

Understanding CVE-2021-30508

This CVE identifies a heap buffer overflow vulnerability in Google Chrome that could be exploited by an attacker to corrupt the heap memory by convincing a user to enable specific features in Chrome.

What is CVE-2021-30508?

CVE-2021-30508 is a heap buffer overflow vulnerability in the Media Feeds of Google Chrome versions prior to 90.0.4430.212. It allows an attacker to potentially exploit heap corruption through a maliciously crafted HTML page.

The Impact of CVE-2021-30508

The impact of this vulnerability is significant as it could lead to heap corruption, potentially enabling malicious actors to execute arbitrary code on the affected system, compromise user data, or carry out further attacks.

Technical Details of CVE-2021-30508

This section delves into the specifics of the vulnerability, the affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The vulnerability arises from a heap buffer overflow in Media Feeds in Google Chrome versions before 90.0.4430.212. By exploiting this flaw, an attacker can achieve heap corruption through a specifically crafted HTML page.

Affected Systems and Versions

Google Chrome versions earlier than 90.0.4430.212 are affected by this vulnerability. Users with outdated Chrome installations are at risk of being impacted by this security issue.

Exploitation Mechanism

To exploit CVE-2021-30508, an attacker needs to lure a user into enabling certain features within Chrome and visiting a specially designed HTML page that triggers the heap buffer overflow, leading to potential heap corruption.

Mitigation and Prevention

Learn how to safeguard your systems against CVE-2021-30508 through immediate and long-term security practices.

Immediate Steps to Take

Users and administrators are advised to update Google Chrome to version 90.0.4430.212 or later to mitigate the vulnerability. Additionally, exercise caution when enabling unknown features within the browser.

Long-Term Security Practices

To enhance overall security posture, ensure timely installation of software updates, maintain awareness of cybersecurity threats, and implement security best practices to prevent future vulnerabilities.

Patching and Updates

Regularly check for Chrome updates and apply them promptly to stay protected against known security vulnerabilities.