CVE-2020-6456: 
Google Chrome vulnerability analysis and mitigation

CVE-2020-6456 is a security vulnerability discovered in Google Chrome versions prior to 81.0.4044.92. The vulnerability was identified by Michał Bentkowski of Securitum on January 10, 2020, and involves insufficient validation of untrusted input in the clipboard functionality that could allow a local attacker to bypass site isolation via crafted clipboard contents (Chrome Blog, NVD).

The vulnerability has been assigned a CVSS v3.1 Base Score of 6.5 (Medium) with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N. The vulnerability stems from improper validation of clipboard input that could potentially allow an attacker to circumvent Chrome's site isolation security feature. The issue is classified under CWE-276 (Incorrect Default Permissions) (NVD).

The vulnerability could allow a local attacker to bypass site isolation protections through specially crafted clipboard contents. This could potentially lead to unauthorized access to sensitive information across different sites, compromising the browser's security boundaries (NVD).

The vulnerability was patched in Google Chrome version 81.0.4044.92. Users are advised to update to this version or later to mitigate the risk. The fix has been distributed to various Linux distributions including Debian, Fedora, and OpenSUSE through their respective security updates (Chrome Blog, Debian).