CVE-2021-21162: 
vulnerability analysis and mitigation

CVE-2021-21162 is a Use-after-free vulnerability discovered in the WebRTC component of Google Chrome versions prior to 89.0.4389.72. The vulnerability was reported anonymously on January 29, 2021, and was patched in March 2021 (Chrome Release).

The vulnerability is classified as a high severity issue with a CVSS v3.1 base score of 8.8. It allows a remote attacker to potentially exploit heap corruption through a specially crafted HTML page targeting the WebRTC component. The vulnerability is characterized as a use-after-free condition, which occurs when a program continues to use memory after it has been freed, potentially leading to arbitrary code execution (NVD).

If successfully exploited, this vulnerability could allow an attacker to execute arbitrary code within the context of the browser, potentially leading to system compromise. The high CVSS score indicates significant potential impact on confidentiality, integrity, and availability of the affected system (NVD).

The vulnerability requires user interaction and can be exploited remotely through a crafted HTML page. The attack complexity is rated as low, indicating relatively straightforward exploitation once the user interacts with the malicious content (NVD).

The vulnerability was fixed in Google Chrome version 89.0.4389.72. Users and administrators are advised to upgrade to this version or later. Multiple Linux distributions have also released security updates to address this vulnerability, including Debian (89.0.4389.114-1~deb10u1), Fedora, and Gentoo (Debian Security, Gentoo Security).