Improper input validation in MySQL Server - CVE-2020-14540

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Main Vulnerability Database Vulnerabilities #VU30094

Improper input validation in MySQL Server - CVE-2020-14540

Published: July 16, 2020


Vulnerability identifier: #VU30094
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-14540
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote privileged user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper input validation within the Server: DML component in MySQL Server. A remote privileged user can exploit this vulnerability to perform a denial of service (DoS) attack.


Affected software

MySQL Server
Amazon Linux AMI
Gentoo Linux
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux Server - TUS
Ubuntu
openEuler
Fedora
rh-mysql80-mysql (Red Hat package)
mysql-server-5.7 (Ubuntu package)
mysql-server-8.0 (Ubuntu package)
mysql
community-mysql

How to mitigate CVE-2020-14540

Install updates from vendor's website.

MySQL Server - update to 5.7.31
rh-mysql80-mysql (Red Hat package) - update to 8.0.21-1.el7
mysql-server-5.7 (Ubuntu package) - addressed in versions 5.7.31-0ubuntu0.16.04.1, 5.7.31-0ubuntu0.18.04.1
mysql-server-8.0 (Ubuntu package) - update to 8.0.21-0ubuntu0.20.04.3
mysql - update to 8.0.21-2
community-mysql - addressed in versions 8.0.21-11.fc31, 8.0.21-11.fc32, 8.0.21-11.fc33
mysql - addressed in versions 8.0-3120200902143940.f636be4b, 8.0-3220200902143940.43bbeeef

External References

Related Security Bulletins