CVE-2020-6476: 
Google Chrome vulnerability analysis and mitigation

CVE-2020-6476 is a security vulnerability discovered in Google Chrome prior to version 83.0.4103.61, reported on December 18, 2019. The vulnerability involves insufficient policy enforcement in the tab strip component that could allow an attacker who convinces a user to install a malicious extension to bypass navigation restrictions via a crafted Chrome Extension (Chrome Release).

The vulnerability is classified as a Medium severity issue with a CVSS v3.1 Base Score of 6.5 (MEDIUM) and vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N. The vulnerability stems from improper enforcement of security policies in the browser's tab strip functionality, which could be exploited through a malicious Chrome extension (NVD).

If successfully exploited, this vulnerability allows an attacker to bypass navigation restrictions in Google Chrome. The attack requires user interaction in the form of installing a malicious extension, after which the attacker can circumvent normal browsing restrictions through the compromised tab strip functionality (Chrome Release).

The vulnerability requires user interaction to exploit, specifically convincing a user to install a malicious Chrome extension. The attack can be executed remotely but requires social engineering to succeed (NVD).

The vulnerability was patched in Google Chrome version 83.0.4103.61. Users and administrators should upgrade to this version or later to mitigate the risk. The fix has been distributed to various Linux distributions including Debian, Fedora, and Gentoo through their respective security updates (Debian Security, Gentoo Security).