CVE-2020-14672: 
MySQL vulnerability analysis and mitigation

CVE-2020-14672 is a vulnerability in Oracle MySQL Server's Stored Procedure component affecting versions 5.6.49 and prior, 5.7.31 and prior, and 8.0.21 and prior. The vulnerability was disclosed in October 2020 as part of Oracle's Critical Patch Update. It is an easily exploitable vulnerability that allows high-privileged attackers with network access via multiple protocols to compromise MySQL Server (Oracle CPU).

The vulnerability has a CVSS 3.1 Base Score of 4.9 (Medium) with the vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H. This indicates that the vulnerability requires network access, is low complexity to exploit, requires high privileges, needs no user interaction, has unchanged scope, and impacts only availability with high severity (NVD).

Successful exploitation of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server. The vulnerability affects the availability of the system but does not impact confidentiality or integrity (Oracle CPU, NetApp Advisory).

The vulnerability is considered easily exploitable but requires a high-privileged attacker with network access via multiple protocols. The attack can be conducted remotely through network access to the MySQL Server (Oracle CPU).

Oracle has released patches for affected versions in the October 2020 Critical Patch Update. Users should upgrade to MySQL versions 5.6.50+, 5.7.32+, or 8.0.22+ to address this vulnerability. Multiple Linux distributions have also released security updates, including Ubuntu with MySQL 8.0.22 for 20.04 LTS and 20.10, and MySQL 5.7.32 for 16.04 LTS and 18.04 LTS (Ubuntu Notice, Fedora Update).