CVE-2021-2011

Severity: high (CVSS 7.1 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-01-20 · updated 2026-06-17

Description

Vulnerability in the MySQL Client product of Oracle MySQL (component: C API). Supported versions that are affected are 5.7.32 and prior and 8.0.22 and prior. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise MySQL Client. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Client. 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).

Affected products

Fedoraproject Fedora: 32, 33
MariaDB: from 5.5.0 before 5.5.61; from 10.0.0 before 10.0.35; from 10.1.0 before 10.1.33; from 10.2.0 before 10.2.15 — fixed in 10.0.35, 10.1.33, 10.2.15, 5.5.61
Active IQ Unified Manager for VMware vSphere, Linux, and Microsoft Windows: all versions
OnCommand Insight: all versions
NetApp OnCommand Workflow Automation: all versions
MySQL Server: from 5.7.0 through 5.7.32; from 8.0.0 through 8.0.22

How to fix

Upgrade to a fixed version: MariaDB 10.0.35, 10.1.33, 10.2.15, 5.5.61. Check the vendor advisory for mitigations.

References

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