CVE-2017-3243

Severity: medium (CVSS 4.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-01-27 · updated 2026-06-17

Description

Vulnerability in the MySQL Server component of Oracle MySQL (subcomponent: Server: Charsets). Supported versions that are affected are 5.5.53 and earlier. Difficult to exploit 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 v3.0 Base Score 4.4 (Availability impacts).

Affected products

Debian Linux: 8.0
MariaDB: from 5.5.0 before 5.5.54; from 10.0.0 before 10.0.29; from 10.1.0 before 10.1.21 — fixed in 10.0.29, 10.1.21, 5.5.54
MySQL Server: from 5.5.0 through 5.5.53
RedHat Enterprise Linux Desktop: 7.0
RedHat Enterprise Linux Eus: 7.4, 7.5, 7.6, 7.7
RedHat Enterprise Linux Server: 7.0
RedHat Enterprise Linux Server Aus: 7.6, 7.7
RedHat Enterprise Linux Server Tus: 7.6, 7.7
RedHat Enterprise Linux Workstation: 7.0

How to fix

Upgrade to a fixed version: MariaDB 10.0.29, 10.1.21, 5.5.54. Check the vendor advisory for mitigations.

References

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