CVE-2020-14568: 
MySQL vulnerability analysis and mitigation

CVE-2020-14568 is a vulnerability discovered in the MySQL Server product of Oracle MySQL, specifically affecting the InnoDB component. The vulnerability affects MySQL versions 8.0.20 and prior. This security issue was disclosed on July 15, 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) with the vector: CVSS:3.1/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, leading to a complete Denial of Service (DoS) of MySQL Server (NVD, NetApp Advisory).

The vulnerability is considered easily exploitable but requires high privileges and network access. The attack can be conducted via multiple protocols, though specific exploit details have not been publicly disclosed (Oracle CPU).

Oracle has released patches to address this vulnerability in MySQL version 8.0.21. Users are strongly advised to upgrade to this version or apply the relevant security patches. Ubuntu users should upgrade to mysql-server-8.0 version 8.0.21-0ubuntu0.20.04.3 for Ubuntu 20.04 LTS (Ubuntu Notice). Fedora users should upgrade to community-mysql version 8.0.21-11 (Fedora Update).