Improper input validation in MySQL Server - CVE-2020-14559

Vulnerability identifier: #VU30109

CSH Severity: Low

CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2020-14559

CWE-ID: CWE-20

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote authenticated user to gain access to sensitive information.

The vulnerability exists due to improper input validation within the Server: Information Schema component in MySQL Server. A remote authenticated user can exploit this vulnerability to gain access to sensitive information.

MySQL Server
Amazon Linux AMI
Gentoo Linux
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for x86_64
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 Power, little endian - 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

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

• https://www.oracle.com/security-alerts/cpujul2020.html

• Multiple vulnerabilities in MySQL Server
• Red Hat Software Collections update for rh-mysql80-mysql
• Amazon Linux AMI update for mysql57
• Gentoo update for MySQL
• openEuler 20.03 LTS update for mysql-8.0.18-2
• Ubuntu update for mysql-5.7
• Red Hat Enterprise Linux 8 update for the mysql:8.0 module
• Red Hat Enterprise Linux 8 update for the mysql:8.0 module
• Fedora 32 Modular update for mysql
• Fedora 31 Modular update for mysql
• Fedora 31 update for community-mysql
• Fedora 33 update for community-mysql
• Fedora 32 update for community-mysql