Improper input validation in MySQL Server - CVE-2020-2761

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Main Vulnerability Database Vulnerabilities #VU26938

Improper input validation in MySQL Server - CVE-2020-2761

Published: April 15, 2020


Vulnerability identifier: #VU26938
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-2020-2761
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: Security: Privileges component in MySQL Server. A remote privileged user can exploit this vulnerability to perform a denial of service (DoS) attack.


Affected software

MySQL Server
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 ARM 64 - Extended Update Support
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 Server - AUS
Red Hat Enterprise Linux Server - TUS
openEuler
Fedora
rh-mysql80-mysql (Red Hat package)
community-mysql
mysql

How to mitigate CVE-2020-2761

Install updates from vendor's website.

MySQL Server - update to 8.0.19
rh-mysql80-mysql (Red Hat package) - update to 8.0.21-1.el7
community-mysql - addressed in versions 8.0.20-1.fc30, 8.0.20-1.fc31, 8.0.20-1.fc32
mysql - update to 8.0.21-2
mysql - addressed in versions 8.0-3020200430120139.a5b0195c, 8.0-3120200430120139.f636be4b, 8.0-3220200430120139.43bbeeef

External References

Related Security Bulletins