CVE-2021-20591 Information

Description

Uncontrolled Resource Consumption vulnerability in Mitsubishi Electric MELSEC iQ-R series CPU modules (R00/01/02CPU all versions R04/08/16/32/120(EN)CPU all versions R08/16/32/120SFCPU all versions R08/16/32/120PCPU all versions R08/16/32/120PSFCPU all versions) allows a remote unauthenticated attacker to prevent legitimate clients from connecting to the MELSOFT transmission port (TCP/IP) by not closing a connection properly which may lead to a denial of service (DoS) condition.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Reference

https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-003_en.pdf https://jvn.jp/vu/JVNVU98060539/index.html

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5