CVE-2020-14776 Denial of service in MySQL Server

Medium 4.9 Published 21 Oct 2020 Updated 26 Sep 2024

A high-privileged attacker can cause a complete denial of service in MySQL Server via network access.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2020-14776?

CVE-2020-14776 is a medium-severity denial of service vulnerability in Fedoraproject Fedora, published on 21 Oct 2020. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

Vulnerability in the MySQL Server product of Oracle MySQL (component: InnoDB). Supported versions that are affected are 5.7.31 and prior and 8.0.21 and prior. Easily exploitable vulnerability allows high privileged attacker with network access via multiple protocols to compromise MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server. CVSS 3.1 Base Score 4.9 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).

Which versions are affected by CVE-2020-14776?

3 open source packages ship an affected version, including mariadb, mariadb-min and mysql-client. It affects 5 products.

Package	Affected	Fixed in
`mariadb` Bitnami	From `10.2.0`	`10.2.35, 10.3.26, 10.4.16, 10.5.7`
`mariadb-min` Bitnami	From `10.2.0`	`10.2.35, 10.3.26, 10.4.16, 10.5.7`
`mysql-client` Bitnami	From `10.2.0`	`10.2.35, 10.3.26, 10.4.16, 10.5.7`

Products include Fedoraproject Fedora, Mariadb Mariadb, Netapp Oncommand Insight, Netapp Snapcenter, Oracle Mysql.

How do I fix CVE-2020-14776?

Upgrade mariadb to a fixed version for your release line: 10.2.35, 10.3.26, 10.4.16 or 10.5.7.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2020-14776 being exploited?

There is no known exploitation of CVE-2020-14776 in the wild and no public exploit code.

All Fedoraproject Fedora vulnerabilities

Sources

Also known as ALPINE-CVE-2020-14776, BIT-mariadb-2020-14776, BIT-mariadb-min-2020-14776, BIT-mysql-client-2020-14776, DEBIAN-CVE-2020-14776, GHSA-wwww-3wrv-3qjj and 1 more.