CVE-2021-30559 : Exploit Details and Defense Strategies

This article provides detailed information about CVE-2021-30559, a vulnerability in Google Chrome that allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Understanding CVE-2021-30559

CVE-2021-30559 is an out-of-bounds write vulnerability in ANGLE in Google Chrome before version 91.0.4472.164. This flaw could be exploited by a remote attacker to trigger heap corruption through a specially crafted HTML page.

What is CVE-2021-30559?

The vulnerability CVE-2021-30559 is categorized as an out-of-bounds write issue in ANGLE in Google Chrome versions before 91.0.4472.164. This security flaw enables a malicious actor to potentially corrupt the heap memory by utilizing a malicious HTML page.

The Impact of CVE-2021-30559

The exploitation of CVE-2021-30559 could lead to a remote attacker executing arbitrary code, causing a denial of service (DoS) condition, or gaining unauthorized access to sensitive information on the affected system. It poses a significant risk to the security and integrity of users' data.

Technical Details of CVE-2021-30559

The following technical aspects of CVE-2021-30559 provide a deeper insight into the nature and implications of this vulnerability.

Vulnerability Description

CVE-2021-30559 involves an out-of-bounds write issue in ANGLE in Google Chrome versions preceding 91.0.4472.164. This flaw can be leveraged by a remote attacker to potentially exploit heap corruption by providing a specially crafted HTML page.

Affected Systems and Versions

The vulnerability impacts Google Chrome versions prior to 91.0.4472.164. Users operating on these versions are at risk of falling victim to the exploitation of CVE-2021-30559.

Exploitation Mechanism

To exploit CVE-2021-30559, an attacker would craft a malicious HTML page and persuade a target user to visit the page. Upon successful execution, the attacker could potentially trigger heap corruption on the victim's system.

Mitigation and Prevention

Protecting systems from vulnerabilities like CVE-2021-30559 involves immediate actions as well as long-term security practices.

Immediate Steps to Take

Users should update their Google Chrome browsers to version 91.0.4472.164 or newer to mitigate the risk of exploitation. It is crucial to stay informed about security updates and promptly apply them to ensure protection against known vulnerabilities.

Long-Term Security Practices

In addition to applying patches and updates promptly, users are advised to practice safe browsing habits, exercise caution when clicking on links or downloading files from untrusted sources, and utilize reputable security software to enhance overall protection.

Patching and Updates

Google released a stable channel update for Google Chrome to address the CVE-2021-30559 vulnerability. Users should verify that their Chrome browser is updated to version 91.0.4472.164 or above to eliminate the risk associated with this security issue.