CVE-2021-2389 Denial of service in MySQL Server
An unauthenticated attacker can cause a complete denial of service in MySQL Server by triggering a hang or crash via network access.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-2389?
CVE-2021-2389 is a medium-severity denial of service vulnerability in Fedoraproject Fedora, published on 20 Jul 2021. An attacker can exploit it over the internet without logging in, 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 5.7.34 and prior and 8.0.25 and prior. Difficult to exploit vulnerability allows unauthenticated 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 5.9 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H).
Which versions are affected by CVE-2021-2389?
3 open source packages ship an affected version, including mariadb, mariadb-min and mysql-client. It affects 7 products.
| Package | Affected | Fixed in |
|---|---|---|
mariadb Bitnami | From 10.2.0 | 10.2.40, 10.3.31, 10.4.21, 10.5.12, 10.6.4 |
mariadb-min Bitnami | From 10.2.0 | 10.2.40, 10.3.31, 10.4.21, 10.5.12, 10.6.4 |
mysql-client Bitnami | From 10.2.0 | 10.2.40, 10.3.31, 10.4.21, 10.5.12, 10.6.4 |
Products include Fedoraproject Fedora, Mariadb Mariadb, Netapp Active Iq Unified Manager, Netapp Oncommand Insight, Netapp Oncommand Workflow Automation, Netapp Snapcenter and 1 more.
How do I fix CVE-2021-2389?
Upgrade mariadb to a fixed version for your release line: 10.2.40, 10.3.31, 10.4.21 or 10.5.12.
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-2021-2389 being exploited?
There is no known exploitation of CVE-2021-2389 in the wild and no public exploit code.
Other vulnerabilities in Fedoraproject Fedora
Sources
Also known as ALPINE-CVE-2021-2389, BIT-mariadb-2021-2389, BIT-mariadb-min-2021-2389, BIT-mysql-client-2021-2389, DEBIAN-CVE-2021-2389, GHSA-xrfh-762q-x6xj and 1 more.