CVE-2021-21128 : Security Advisory and Response
Discover the details of CVE-2021-21128, a heap buffer overflow vulnerability in Google Chrome before 88.0.4324.96, allowing remote attackers to exploit heap corruption via a crafted HTML page. Learn about the impact, technical details, affected systems, and mitigation steps.
A heap buffer overflow vulnerability in Google Chrome prior to version 88.0.4324.96 has been identified, allowing a remote attacker to potentially exploit heap corruption through a specially crafted HTML page.
Understanding CVE-2021-21128
This section will cover the details related to the CVE-2021-21128 vulnerability.
What is CVE-2021-21128?
The CVE-2021-21128 is a heap buffer overflow vulnerability found in Blink in Google Chrome versions earlier than 88.0.4324.96. It enables a remote attacker to potentially achieve heap corruption using a maliciously crafted HTML page.
The Impact of CVE-2021-21128
The impact of this vulnerability is significant as it allows remote attackers to exploit heap corruption, potentially leading to the execution of arbitrary code or a denial of service (DoS) condition on the targeted system.
Technical Details of CVE-2021-21128
This section will delve into the technical specifics of CVE-2021-21128.
Vulnerability Description
The vulnerability is classified as a heap buffer overflow, indicating the potential for an attacker to overflow the buffer, leading to heap corruption and subsequent exploitation.
Affected Systems and Versions
Google Chrome versions prior to 88.0.4324.96 are affected by this vulnerability. Users with these versions are at risk of exploitation by remote attackers.
Exploitation Mechanism
Remote attackers can exploit this vulnerability through a specifically crafted HTML page, triggering heap corruption and potentially gaining unauthorized access to the system.
Mitigation and Prevention
To safeguard systems from CVE-2021-21128, immediate actions and long-term security practices are essential.
Immediate Steps to Take
Users and administrators should promptly update Google Chrome to version 88.0.4324.96 or newer to mitigate the risk of exploitation. It is crucial to apply security patches and updates provided by Google.
Long-Term Security Practices
Implementing secure coding practices, network segmentation, and regular security training can enhance overall security posture and help prevent similar vulnerabilities in the future.
Patching and Updates
Regularly monitor for security alerts, apply patches promptly, and stay informed about the latest security recommendations to protect systems effectively.