Improper input validation in MySQL Server - CVE-2020-14550

Vulnerability identifier: #VU30091

CSH Severity: Medium

CVSS v4: 6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2020-14550

CWE-ID: CWE-20

Exploitation vector: Remote access

Exploit availability: No public exploit available

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

The vulnerability exists due to improper input validation within the C API component in MySQL Client. A remote authenticated user can exploit this vulnerability to perform a denial of service (DoS) attack.

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
Data Computing Appliance (DCA)

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
Data Computing Appliance (DCA) - update to 4.3.0.0
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
• Multiple vulnerabilities in Dell EMC Data Computing Appliance (DCA)
• 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