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CVE-2020-5666

Quick assessment

Affected
Mitsubishi Electric Corporation MELSEC iQ-R Series CPU Modules
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Mitsubishi Electric MELSEC iQ-R series是日本三菱电机（Mitsubishi Electric）公司的一款可编程逻辑控制器。 MELSEC iQ-R series CPU modules 存在资源管理错误漏洞，该漏洞源于存在资源不可控消耗拒绝服务漏洞。将CPU模块的Web服务器参数设置为不使用时，此漏洞不影响产品，默认设置未使用。

AI Predicted 7.5 Difficulty: Easy EPSS 8.75% · P95

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2020-5666

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Mitsubishi Electric MELSEC iQ-R series 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mitsubishi Electric MELSEC iQ-R series是日本三菱电机（Mitsubishi Electric）公司的一款可编程逻辑控制器。 MELSEC iQ-R series CPU modules 存在资源管理错误漏洞，该漏洞源于存在资源不可控消耗拒绝服务漏洞。将CPU模块的Web服务器参数设置为不使用时，此漏洞不影响产品，默认设置未使用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Mitsubishi Electric Corporation 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' -

II. Public POCs for CVE-2020-5666

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III. Intelligence Information for CVE-2020-5666

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Vendor Advisories for CVE-2020-5666 (3)

Other References for CVE-2020-5666 (1)

IV. Related Vulnerabilities

Same product: MELSEC iQ-R Series CPU Modules
Same vendor: Mitsubishi Electric Corporation

V. Comments for CVE-2020-5666

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