CVE-2020-14632: 
MySQL vulnerability analysis and mitigation

CVE-2020-14632 is a vulnerability in the MySQL Server product of Oracle MySQL, specifically affecting the Server Options component. The vulnerability affects MySQL versions 8.0.20 and prior. This vulnerability was disclosed in July 2020 as part of Oracle's Critical Patch Update (Oracle CPU).

The vulnerability is classified as easily exploitable and requires a high-privileged attacker with network access via multiple protocols to compromise MySQL Server. The vulnerability has a CVSS 3.1 Base Score of 4.9 (Medium severity) with the vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H (CVE Details).

Successful exploitation of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash, leading to a complete Denial of Service (DoS) of MySQL Server (Oracle CPU, NetApp Advisory).

The vulnerability is considered easily exploitable but requires high privileges and network access. The attack can be conducted through multiple protocols to compromise the MySQL Server (CVE Details).

The vulnerability has been fixed in subsequent releases of MySQL. Users are advised to upgrade to patched versions. Ubuntu users should upgrade to mysql-server-8.0 version 8.0.21-0ubuntu0.20.04.3 for Ubuntu 20.04, and mysql-server-5.7 version 5.7.31-0ubuntu0.18.04.1 for Ubuntu 18.04 (Ubuntu Notice).