CVE-2021-46661 Denial of service in n/a
An attacker can cause a MariaDB application crash by exploiting an unused common table expression in specific query processing functions.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-46661?
CVE-2021-46661 is a medium-severity denial of service vulnerability in Fedoraproject Fedora, published on 1 Feb 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
MariaDB through 10.5.9 allows an application crash in find_field_in_tables and find_order_in_list via an unused common table expression (CTE).
Which versions are affected by CVE-2021-46661?
3 open source packages ship an affected version, including mariadb, mariadb-min and mysql-client. It affects 2 products.
| Package | Affected | Fixed in |
|---|---|---|
mariadb Bitnami | From 10.2.0 | 10.2.43, 10.3.34, 10.4.24, 10.5.15, 10.6.7, 10.7.3 |
mariadb-min Bitnami | From 10.2.0 | 10.2.43, 10.3.34, 10.4.24, 10.5.15, 10.6.7, 10.7.3 |
mysql-client Bitnami | From 10.2.0 | 10.2.43, 10.3.34, 10.4.24, 10.5.15, 10.6.7, 10.7.3 |
Products include Fedoraproject Fedora, Mariadb Mariadb.
How do I fix CVE-2021-46661?
Upgrade mariadb to a fixed version for your release line: 10.2.43, 10.3.34, 10.4.24 or 10.5.15.
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-2021-46661 being exploited?
There is no known exploitation of CVE-2021-46661 in the wild and no public exploit code.
Other vulnerabilities in Fedoraproject Fedora
Sources
Also known as ALPINE-CVE-2021-46661, AZL-8405, BIT-mariadb-2021-46661, BIT-mariadb-min-2021-46661, BIT-mysql-client-2021-46661, DEBIAN-CVE-2021-46661 and 2 more.