Not ratedCVE-2012-6439

    Rockwell Automation ControlLogix PLC Improper Access Control (CVE-2012-6439)

    Published Sources: CVE.org

    Share

    What is affected, what to do

    When an affected product receives a valid CIP message from an unauthorized or unintended source to Port 2222/TCP, Port 2222/UDP, Port 44818/TCP, or Port 44818/UDP that changes the product’s configuration and network parameters, a DoS condition can occur. This situation could cause loss of availability and a disruption of communication with other connected devices.

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

    Affected
    • Rockwell Automation ControlLogix, CompactLogix, GuardLogix, and SoftLogix lte *..18
    • Rockwell Automation CompactLogix and SoftLogix controllers lte *..19
    • Rockwell Automation ControlLogix and GuardLogix controllers lte *..20
    • Rockwell Automation MicroLogix eq 1100..1100
    • Rockwell Automation MicroLogix eq 1400..1400

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

    Metrics

    —

    XIEM Effective CVSS

    No value is available for this vulnerability.

    —

    CVSS v3

    No value is available for this vulnerability.

    23.2 %

    EPSS score

    Elevated — model estimates 10-50% exploitation likelihood.

    Source: FIRST EPSS, percentile 97.8

    Show all metrics
    Severity
    Not rated
    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
    76.52 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
    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
    23.2 %
    Elevated — model estimates 10-50% 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
    97.8
    Critical — this CVE ranks in the top fifth of all CVEs scored today (rank ≥ 80%).
    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
    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-284

    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
    Handle the vulnerability in regular vulnerability handling under Art. 21(2)(e) NIS2.
    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

    When an affected product receives a valid CIP message from an unauthorized or unintended source to Port 2222/TCP, Port 2222/UDP, Port 44818/TCP, or Port 44818/UDP that changes the product’s configuration and network parameters, a DoS condition can occur. This situation could cause loss of availability and a disruption of communication with other connected devices.  Rockwell Automation EtherNet/IP products; 1756-ENBT, 1756-EWEB, 1768-ENBT, and 1768-EWEB communication modules; CompactLogix L32E and L35E controllers; 1788-ENBT FLEXLogix adapter; 1794-AENTR FLEX I/O EtherNet/IP adapter; ControlLogix 18 and earlier; CompactLogix 18 and earlier; GuardLogix 18 and earlier; SoftLogix 18 and earlier; CompactLogix controllers 19 and earlier; SoftLogix controllers 19 and earlier; ControlLogix controllers 20 and earlier; GuardLogix controllers 20 and earlier; and MicroLogix 1100 and 1400

    Source: NVD (NIST), cvelistv5

    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
    Rockwell AutomationCompactLogix and SoftLogix controllers
    • ≤ 19
    • —
    Rockwell AutomationControlLogix and GuardLogix controllers
    • ≤ 20
    • —
    Rockwell AutomationControlLogix, CompactLogix, GuardLogix, and SoftLogix
    • ≤ 18
    • —
    Rockwell AutomationMicroLogix
    • 1100
    • 1400
    • —
    • —
    rockwellautomation1756-enbt
    • —
    • —
    rockwellautomation1756-eweb
    • —
    • —
    rockwellautomation1768-enbt
    • —
    • —
    rockwellautomation1768-eweb
    • —
    • —
    rockwellautomation1794-aentr_flex_i\/o_ethernet\/ip_adapter
    • —
    • —
    rockwellautomationcompactlogix
    • ≤ 18
    • —
    rockwellautomationcompactlogix_controllers
    • ≤ 19
    • —
    rockwellautomationcompactlogix_l32e_controller
    • —
    • —
    rockwellautomationcompactlogix_l35e_controller
    • —
    • —
    rockwellautomationcontrollogix
    • ≤ 18
    • —
    rockwellautomationcontrollogix_controllers
    • ≤ 20
    • —
    rockwellautomationflexlogix_1788-enbt_adapter
    • —
    • —
    rockwellautomationguardlogix
    • ≤ 18
    • —
    rockwellautomationguardlogix_controllers
    • ≤ 20
    • —
    rockwellautomationmicrologix
    • ≤ 1400
    • ≤ 1100
    • —
    • —
    rockwellautomationsoftlogix
    • ≤ 18
    • —
    rockwellautomationsoftlogix_controllers
    • ≤ 19
    • —

    Vendors and products

    Weakness classes (CWE)

    • CWE-284Improper Access Control

      Pillar

      The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

      Entry at MITRE CWE-284

    References & sources

    Embed badge

    Show the severity and KEV status of this vulnerability on your site – with a link back here. The image is updated hourly.

    Badge preview for CVE-2012-6439
    <a href="https://intel.neosec.eu/en/cve/CVE-2012-6439"><img src="https://intel.neosec.eu/badge/cve/CVE-2012-6439.svg?lang=en" alt="CVE-2012-6439 – NEOSEC Intel" height="20"></a>