Improper input validation in MySQL Server - CVE-2021-2024

Vulnerability identifier: #VU49804

CSH Severity: Medium

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

CVE-ID: CVE-2021-2024

CWE-ID: CWE-20

Exploitation vector: Remote access

Exploit availability: No public exploit available

Affected software:
MySQL Server
Gentoo Linux
Anolis OS
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux Server - AUS
Ubuntu
openEuler
Red Hat Software Collections
rh-mysql80-mysql (Red Hat package)
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
mecab
mecab-ipadic
mecab-ipadic-EUCJP
mysql-server-5.7 (Ubuntu package)
mysql-server-8.0 (Ubuntu package)
mysql
mysql-common
mysql-devel
mysql-errmsg
mysql-libs
mysql-server
mysql-test

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 Server: Optimizer component in MySQL Server. A remote authenticated user can exploit this vulnerability to perform a denial of service (DoS) attack.

Install updates from vendor's website.

• https://www.oracle.com/security-alerts/cpujan2021.html