CriticalCVE-2023-4088

    Malicious Code Execution Vulnerability in FA Engineering Software Products (CVE-2023-4088)

    Published Sources: CISA ICS, CVE.org

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    What is affected, what to do

    Incorrect Default Permissions vulnerability in Mitsubishi Electric Corporation multiple FA engineering software products allows a malicious local attacker to execute a malicious code, resulting in information disclosure, tampering with and deletion, or a denial-of-service (DoS) condition, if the product is installed in a folder other than the default installation folder.

    The available sources name no fixed version. Check the vendor guidance in the references below.

    Affected
    • Mitsubishi Electric GX Works3 eq all versions..all versions
    • Mitsubishi Electric AL-PCS/WIN-E eq all versions..all versions
    • Mitsubishi Electric CPU Module Logging Configuration Tool eq all versions..all versions
    • Mitsubishi Electric EZSocket eq all versions..all versions
    • Mitsubishi Electric FR Configurator2 eq all versions..all versions
    • Mitsubishi Electric FX Configurator-EN eq all versions..all versions
    • Mitsubishi Electric FX Configurator-EN-L eq all versions..all versions
    • Mitsubishi Electric FX Configurator-FP eq all versions..all versions
    • Mitsubishi Electric GT Designer3 Version1 (GOT1000) eq all versions..all versions
    • Mitsubishi Electric GT Designer3 Version1 (GOT2000) eq all versions..all versions
    • Mitsubishi Electric GT SoftGOT1000 Version3 eq all versions..all versions
    • Mitsubishi Electric GT SoftGOT2000 Version1 eq all versions..all versions
    • Mitsubishi Electric GX LogViewer eq all versions..all versions
    • Mitsubishi Electric GX Works2 eq all versions..all versions
    • Mitsubishi Electric MELSOFT FieldDeviceConfigurator eq all versions..all versions
    • Mitsubishi Electric MELSOFT iQ AppPortal eq all versions..all versions
    • Mitsubishi Electric MELSOFT MaiLab eq all versions..all versions
    • Mitsubishi Electric MELSOFT Navigator eq all versions..all versions
    • Mitsubishi Electric MELSOFT Update Manager eq all versions..all versions
    • Mitsubishi Electric MX Component eq all versions..all versions
    • Mitsubishi Electric MX Sheet eq all versions..all versions
    • Mitsubishi Electric PX Developer eq all versions..all versions
    • Mitsubishi Electric RT ToolBox3 eq all versions..all versions
    • Mitsubishi Electric RT VisualBox eq all versions..all versions
    • Mitsubishi Electric Data Transfer eq all versions..all versions
    • Mitsubishi Electric Data Transfer Classic eq all versions..all versions

    Not sure whether and how you are affected? Ask a question about this vulnerability

    Metrics

    9.3

    Priority

    XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.

    Source: Vendor (CNA), CVSS v3

    9.3

    CVSS v3

    Severity Critical on the scale from 0 to 10.

    Source: CISA ICS, CVE.org

    0.2 %

    EPSS score

    Low — model estimates < 1% exploitation likelihood.

    Source: FIRST EPSS, percentile 8.1

    Show all metrics
    Severity
    Critical
    Priority (0–325)

    The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first?

    Read in glossary
    50.46 Methodology
    Exploit maturity

    An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack.

    Read in glossary
    no public PoC known
    XIEM Effective CVSS

    XIEM® is the tiered managed-security operating model from NEOSEC and a registered trademark of NEOSEC GmbH. It extends classic SIEM — the central collection, normalisation and correlation of security-relevant events — with endpoint forensics, network visibility and deception technology, and consolidates them into three building tiers: Sentry, Orchestrate and Command.

    Read in glossary
    9.3 Methodology
    CVSS v3

    CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions.

    Read in glossary
    9.3
    EPSS score

    The EPSS score is the absolute model output for an individual vulnerability: the estimated probability of real-world exploitation within the next 30 days, expressed as a value between 0 and 1 (i.e. 0 % to 100 %). A score of 0.42 means „the model estimates a 42 % chance of real-world exploitation within 30 days“.

    Read in glossary
    0.2 %
    Low — model estimates < 1% exploitation likelihood.
    EPSS percentile

    The EPSS percentile is the relative position of a vulnerability within all EPSS-scored CVEs, expressed as a value between 0 and 1. A percentile of 0.90 means „this CVE has a higher EPSS score than 90 % of all other scored CVEs“. Unlike the EPSS score, it is not a probability — but a positioning within a ranking.

    Read in glossary
    8.1
    Low — this CVE sits in the lower 10% of all CVEs scored today.
    KEV status

    The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching.

    Read in glossary
    —
    Published
    CISA assessment (SSVC)
    Exploitation: none known · not automatable · Technical impact: total
    Source: CISA Vulnrichment, as of 24 September 2024
    CWE

    CWE is a catalogue of typical weakness types in software and hardware — such as flawed input validation, unsafe memory handling or poor authentication. Where a CVE names a concrete vulnerability in a concrete product, a CWE describes the underlying class of defect.

    Read in glossary
    CWE-276

    Detection rules

    No NEOSEC detection rule is available for this vulnerability yet.

    Classification under NIS2 and CRA

    Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.

    NIS2

    NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management.

    Read in glossary
    High technical severity: assess and remediate the vulnerability in vulnerability handling under Art. 21(2)(e) NIS2 and document the decision.
    CRA

    The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates.

    Read in glossary
    From 11.12.2027, Annex I Part II CRA requires manufacturers of affected products with digital elements to handle vulnerabilities without delay and provide security updates.
    ISO/IEC 27001

    ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security.

    Read in glossary
    Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.

    Description

    Incorrect Default Permissions vulnerability in Mitsubishi Electric Corporation multiple FA engineering software products allows a malicious local attacker to execute a malicious code, resulting in information disclosure, tampering with and deletion, or a denial-of-service (DoS) condition, if the product is installed in a folder other than the default installation folder.

    Source: cisa_ics_advisory, cvelistv5, NVD (NIST)

    Affected products

    The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.

    Affected products
    Affected versionsFixed in
    Mitsubishi Electric CorporationAL-PCS/WIN-E
    • all versions
    • —
    Mitsubishi Electric CorporationCPU Module Logging Configuration Tool
    • all versions
    • —
    Mitsubishi Electric CorporationData Transfer
    • all versions
    • —
    Mitsubishi Electric CorporationData Transfer Classic
    • all versions
    • —
    Mitsubishi Electric CorporationEZSocket
    • all versions
    • —
    Mitsubishi Electric CorporationFR Configurator2
    • all versions
    • —
    Mitsubishi Electric CorporationFX Configurator-EN
    • all versions
    • —
    Mitsubishi Electric CorporationFX Configurator-EN-L
    • all versions
    • —
    Mitsubishi Electric CorporationFX Configurator-FP
    • all versions
    • —
    Mitsubishi Electric CorporationGT Designer3 Version1(GOT1000)
    • all versions
    • —
    Mitsubishi Electric CorporationGT Designer3 Version1(GOT2000)
    • all versions
    • —
    Mitsubishi Electric CorporationGT SoftGOT1000 Version3
    • all versions
    • —
    Mitsubishi Electric CorporationGT SoftGOT2000 Version1
    • all versions
    • —
    Mitsubishi Electric CorporationGX LogViewer
    • all versions
    • —
    Mitsubishi Electric CorporationGX Works2
    • all versions
    • —
    Mitsubishi Electric CorporationGX Works3
    • all versions
    • —
    Mitsubishi Electric CorporationMELSOFT FieldDeviceConfigurator
    • all versions
    • —
    Mitsubishi Electric CorporationMELSOFT iQ AppPortal
    • all versions
    • —
    Mitsubishi Electric CorporationMELSOFT MaiLab
    • all versions
    • —
    Mitsubishi Electric CorporationMELSOFT Navigator
    • all versions
    • —
    Mitsubishi Electric CorporationMELSOFT Update Manager
    • all versions
    • —
    Mitsubishi Electric CorporationMX Component
    • all versions
    • —
    Mitsubishi Electric CorporationMX Sheet
    • all versions
    • —
    Mitsubishi Electric CorporationPX Developer
    • all versions
    • —
    Mitsubishi Electric CorporationRT ToolBox3
    • all versions
    • —
    Mitsubishi Electric CorporationRT VisualBox
    • all versions
    • —
    mitsubishielectricgx_works3
    • —
    • —

    Vendors and products

    Weakness classes (CWE)

    • CWE-276Incorrect Default Permissions

      Base

      During installation, installed file permissions are set to allow anyone to modify those files.

      Entry at MITRE CWE-276

    References & sources

    • mitsubishielectric.comen/psirt/vulnerability/pdf/2023-010_en.pdfVendor advisory, Vendor advisory
    • jvn.jpvu/JVNVU96447193/index.htmlgovernment-resource
    • cisa.govnews-events/ics-advisories/icsa-23-269-03government-resource
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    <a href="https://intel.neosec.eu/en/cve/CVE-2023-4088"><img src="https://intel.neosec.eu/badge/cve/CVE-2023-4088.svg?lang=en" alt="CVE-2023-4088 – NEOSEC Intel" height="20"></a>