Critical Denial of Service Vulnerability in MariaDB - CVE-2018-3284

mariadb Updated 02 Oct 2025

Summary

17/10/2018

Disclosed on

N/A

Severity

Yes i

Fix available

Medium

Severity

4.4

CVSS Score

ALPINE-CVE-2018-3284: Vulnerability in the MySQL Server component of Oracle MySQL (subcomponent: InnoDB). Affects mariadb versions < 10.3.11-r0. Fixed in 10.3.11-r0. How to fix ↓

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Background

MariaDB is an open-source relational database management system that is widely used for web applications and data storage. It is a fork of MySQL and offers enhanced features, performance improvements, and security enhancements. The vulnerability in question, CVE-2018-3284, affects multiple versions of MariaDB, allowing high-privileged attackers with network access to exploit the system, potentially leading to a denial of service.

Vulnerability Detail

CVE-2018-3284 is a vulnerability in the MySQL Server component of Oracle MySQL, specifically in the InnoDB subcomponent. Supported versions affected include 5.7.23 and prior, as well as 8.0.12 and prior. The vulnerability is difficult to exploit but allows an attacker with high privileges and network access to compromise the MySQL Server. Successful exploitation can result in unauthorized ability to cause a hang or frequently repeatable crash of the MySQL Server, leading to a complete denial of service (DoS). The CVSS 3.0 Base Score for this vulnerability is 4.4, indicating moderate severity with potential availability impacts.

How To Fix

Minimum fixed version

10.3.11-r0

This is the first release that contains the fix.

sudo apk add --upgrade mariadb

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Workaround

As a temporary workaround, restrict network access to the MariaDB server to trusted hosts only. This can be done by configuring the firewall to allow connections only from specific IP addresses.

Conclusion

CVE-2018-3284 is a significant vulnerability affecting various versions of MariaDB, allowing potential denial of service attacks. It is crucial to update to the patched versions to mitigate risks. Users should also consider implementing network restrictions as a temporary workaround.

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