CVE-2020-2812: 
MySQL vulnerability analysis and mitigation

CVE-2020-2812 is a vulnerability in the MySQL Server product of Oracle MySQL, specifically affecting the Server: Stored Procedure component. The affected versions include MySQL 5.6.47 and prior, 5.7.29 and prior, and 8.0.19 and prior. This vulnerability was disclosed in April 2020 as part of Oracle's Critical Patch Update (Oracle CPU).

The vulnerability is classified as an easily exploitable vulnerability that allows high-privileged attackers with network access via multiple protocols to compromise MySQL Server. The vulnerability has a CVSS 3.0 Base Score of 4.9 (Medium) with the following vector: (CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H) (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 only affects availability with no impact on confidentiality or integrity (Oracle CPU).

The vulnerability requires a high-privileged attacker with network access. The attack complexity is considered low, requiring no user interaction to exploit. The vulnerability can be accessed through multiple network protocols (NVD).

The vulnerability has been fixed in subsequent releases of MySQL. MariaDB, which is based on MySQL, has also addressed this vulnerability in versions 10.2.32, 10.3.23, and 10.4.13. Users are advised to upgrade to these or later versions (OpenSUSE, Gentoo).