CVE-2020-5666 Information

Description

Uncontrolled resource consumption vulnerability in MELSEC iQ-R Series CPU Modules (R00/01/02CPU Firmware versions from ‘05’ to ‘19’ and R04/08/16/32/120(EN)CPU Firmware versions from ‘35’ to ‘51’) allows a remote attacker to cause an error in a CPU unit via a specially crafted HTTP packet which may lead to a denial-of-service (DoS) condition in execution of the program and its communication.

CVSS Vector

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

Reference

https://jvn.jp/jp/JVN44764844/index.html https://jvn.jp/en/jp/JVN44764844/index.html https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-015_en.pdf https://us-cert.cisa.gov/ics/advisories/icsa-20-317-01

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