CVE-2021-2081: 
MySQL vulnerability analysis and mitigation

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Stored Procedure) affecting versions 8.0.22 and prior. This vulnerability was disclosed in January 2021 as part of Oracle's Critical Patch Update. The vulnerability allows high privileged attackers with network access via multiple protocols to compromise MySQL Server (Oracle Advisory).

The vulnerability has a CVSS 3.1 Base Score of 4.9 (Medium severity) with the following vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H. The vulnerability is easily exploitable but requires high privileges. It affects the Stored Procedure component of MySQL Server (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 Advisory).

The vulnerability is considered easily exploitable but requires high privileges and network access via multiple protocols. An attacker needs to have high-privileged access to successfully exploit this vulnerability (NVD).

Oracle released patches for this vulnerability in MySQL version 8.0.23. Users are strongly recommended to upgrade to this version or later. For Ubuntu systems, fixed versions are available in version 8.0.23-1 for various releases. Gentoo users should upgrade to MySQL version >= 8.0.24 (Gentoo Advisory, Ubuntu Security).