Discover the impact of CVE-2021-21150, a 'Use after free' vulnerability in Google Chrome allowing a remote attacker to potentially escape the sandbox via a crafted HTML page.
A detailed overview of CVE-2021-21150, a vulnerability in Google Chrome that allowed a remote attacker to potentially escape the sandbox via a crafted HTML page.
Understanding CVE-2021-21150
This section will cover what CVE-2021-21150 is and its impact.
What is CVE-2021-21150?
CVE-2021-21150 is a 'Use after free' vulnerability in Google Chrome on Windows versions prior to 88.0.4324.182. It enabled a remote attacker who compromised the renderer process to potentially perform a sandbox escape using a specifically crafted HTML page.
The Impact of CVE-2021-21150
The impact of this vulnerability was significant as it allowed an attacker to execute arbitrary code outside the confines of the Chrome sandbox, potentially leading to further system compromise.
Technical Details of CVE-2021-21150
In this section, you will find specific technical details regarding the vulnerability.
Vulnerability Description
The vulnerability stemmed from a flaw in handling Downloads in Google Chrome, prior to version 88.0.4324.182, which could be exploited by an attacker to escape the Chrome sandbox.
Affected Systems and Versions
Google Chrome versions less than 88.0.4324.182 on Windows were affected by this vulnerability.
Exploitation Mechanism
The exploit required compromising the renderer process and utilizing a specially crafted HTML page to trigger the use after free condition.
Mitigation and Prevention
This section will provide insights into how to mitigate and prevent exploitation of CVE-2021-21150.
Immediate Steps to Take
Users were advised to update Google Chrome to version 88.0.4324.182 or newer to prevent exploitation of this vulnerability.
Long-Term Security Practices
It is recommended to regularly update software and follow secure browsing practices to minimize the risk of such vulnerabilities.
Patching and Updates
Chrome released a stable channel update addressing CVE-2021-21150 to ensure users are protected from this and other security threats.