Improper input validation in MySQL Server - CVE-2021-35644

Vulnerability identifier: #VU57535

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-2021-35644

CWE-ID: CWE-20

Exploitation vector: Remote access

Exploit availability: No public exploit available

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

MySQL Server
Oracle Linux
Anolis OS
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 ARM 64 - Extended Update Support
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Ubuntu
openEuler
rh-mysql80-mysql (Red Hat package)
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
mecab
mecab-ipadic-EUCJP
mecab-ipadic
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
IBM Security Guardium

Install updates from vendor's website.

MySQL Server - update to 8.0.27
rh-mysql80-mysql (Red Hat package) - update to 8.0.30-1.el7
mecab - update to 0.996-2
mecab-ipadic-EUCJP - update to 2.7.0.20070801-16.0.1
mecab-ipadic - update to 2.7.0.20070801-16.0.1
mysql-server-5.7 (Ubuntu package) - update to 5.7.36-0ubuntu0.18.04.1
mysql-server-8.0 (Ubuntu package) - addressed in versions 8.0.27-0ubuntu0.20.04.1, 8.0.27-0ubuntu0.21.04.1, 8.0.27-0ubuntu0.21.10.1
mysql - addressed in versions 8.0.27-1, 8.0.28-1
mysql - update to 8.0.30-1.0.1
mysql-common - update to 8.0.30-1.0.1
mysql-devel - update to 8.0.30-1.0.1
mysql-errmsg - update to 8.0.30-1.0.1
mysql-libs - update to 8.0.30-1.0.1
mysql-server - update to 8.0.30-1.0.1
mysql-test - update to 8.0.30-1.0.1

• https://www.oracle.com/security-alerts/cpuoct2021.html

• Multiple vulnerabilities in MySQL Server
• Multiple vulnerabilities in IBM Security Guardium
• Ubuntu update for mysql-5.7
• Red Hat Software Collections update for rh-mysql80-mysql
• Red Hat Enterprise Linux 8 update for the mysql:8.0 module
• Multiple vulnerabilities in Oracle Linux
• openEuler update for mysql
• openEuler 20.03 LTS SP3 update for mysql
• Anolis OS update for mysql:8.0 module