CVE-2021-21111 Explained : Impact and Mitigation
Learn about CVE-2021-21111 affecting Google Chrome prior to 87.0.4280.141, enabling sandbox escape through a crafted extension. Mitigation steps included.
Google Chrome prior to version 87.0.4280.141 is affected by an insufficient policy enforcement vulnerability in WebUI. This vulnerability could allow an attacker to execute a sandbox escape through a maliciously crafted Chrome Extension.
Understanding CVE-2021-21111
This section will cover the essential details regarding CVE-2021-21111.
What is CVE-2021-21111?
The CVE-2021-21111 vulnerability exists in Google Chrome's WebUI, where an attacker could bypass policy enforcement. By persuading a user to install a malicious extension, the attacker may trigger a sandbox escape using a specially crafted Chrome Extension.
The Impact of CVE-2021-21111
The impact of this vulnerability is significant as it allows attackers to execute arbitrary code outside the Chrome sandbox, potentially leading to further system compromise.
Technical Details of CVE-2021-21111
In this section, we will delve into the technical aspects of CVE-2021-21111.
Vulnerability Description
The vulnerability involves insufficient policy enforcement in Google Chrome's WebUI, enabling threat actors to exploit it for a sandbox escape using a malicious Chrome Extension.
Affected Systems and Versions
Google Chrome versions prior to 87.0.4280.141 are affected by this vulnerability.
Exploitation Mechanism
The exploitation of CVE-2021-21111 occurs when a user is convinced to install a corrupted extension, allowing the attacker to break out of Chrome's sandbox environment.
Mitigation and Prevention
To mitigate the risks associated with CVE-2021-21111, consider the following preventive measures.
Immediate Steps to Take
Users should update their Google Chrome browser to version 87.0.4280.141 or later to eliminate the vulnerability. Avoid installing extensions from untrusted sources.
Long-Term Security Practices
Maintain a cautious approach when granting permissions to browser extensions. Regularly review and remove extensions that are no longer necessary or from unverified sources.
Patching and Updates
Stay informed about security updates and patches released by Google Chrome. Timely updating the browser ensures protection against known vulnerabilities and exploits.