MediumCVE-2023-37482

    Siemens SIMATIC Drive Controller CPU 1504D TF: Observable Discrepancy (CVE-2023-37482)

    Published Sources: CVE.org, Siemens ProductCERT

    What is affected, what to do

    The login functionality of the web server in affected devices does not normalize the response times of login attempts. An unauthenticated remote attacker could exploit this side-channel information to distinguish between valid and invalid usernames.

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

    Affected
    • Siemens SIMATIC Drive Controller CPU 1504D TF gte V3.1.0..*
    • Siemens SIMATIC Drive Controller CPU 1507D TF gte V3.1.0..*
    • Siemens SIMATIC ET 200SP CPU 1510SP F-1 PN gte V3.1.0..*
    • Siemens SIMATIC ET 200SP CPU 1510SP-1 PN gte V3.1.0..*
    • Siemens SIMATIC ET 200SP CPU 1512SP F-1 PN gte V3.1.0..*
    • Siemens SIMATIC ET 200SP CPU 1512SP-1 PN gte V3.1.0..*
    • Siemens SIMATIC ET 200SP CPU 1514SP F-2 PN gte V3.1.0..*
    • Siemens SIMATIC ET 200SP CPU 1514SP-2 PN gte V3.1.0..*
    • Siemens SIMATIC ET 200SP CPU 1514SPT F-2 PN gte V3.1.0..*
    • Siemens SIMATIC ET 200SP CPU 1514SPT-2 PN gte V3.1.0..*
    • Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) gte V30.1.0..*
    • Siemens SIMATIC S7-1500 CPU 1511-1 PN gte V3.1.0..*
    • Siemens SIMATIC S7-1500 CPU 1511C-1 PN gte V3.1.0..*
    • Siemens SIMATIC S7-1500 CPU 1511F-1 PN gte V3.1.0..*
    • Siemens SIMATIC S7-1500 CPU 1511T-1 PN gte V3.1.0..*
    • Siemens SIMATIC S7-1500 CPU 1511TF-1 PN gte V3.1.0..*
    • Siemens SIMATIC S7-1500 CPU 1512C-1 PN gte V3.1.0..*
    • Siemens SIMATIC S7-1500 CPU 1513-1 PN gte V3.1.0..*
    • Siemens SIMATIC S7-1500 CPU 1513F-1 PN gte V3.1.0..*
    • Siemens SIMATIC S7-1500 CPU 1513pro F-2 PN gte V3.1.0..*
    • Siemens SIMATIC S7-1500 CPU 1513pro-2 PN gte V3.1.0..*
    • Siemens SIMATIC S7-1500 CPU 1513R-1 PN gte V3.1.0..*
    • Siemens SIMATIC S7-1500 CPU 1515-2 PN gte V3.1.0..*
    • Siemens SIMATIC S7-1500 CPU 1515F-2 PN gte V3.1.0..*
    • Siemens SIMATIC S7-1500 CPU 1515R-2 PN gte V3.1.0..*
    • Siemens SIMATIC S7-1500 CPU 1515T-2 PN gte V3.1.0..*
    • Siemens SIMATIC S7-1500 CPU 1515TF-2 PN gte V3.1.0..*
    • Siemens SIMATIC S7-1500 CPU 1516-3 PN/DP gte V3.1.0..*
    • Siemens SIMATIC S7-1500 CPU 1516F-3 PN/DP gte V3.1.0..*
    • Siemens SIMATIC S7-1500 CPU 1516pro F-2 PN gte V3.1.0..*
    • Siemens SIMATIC S7-1500 CPU 1516pro-2 PN gte V3.1.0..*
    • Siemens SIMATIC S7-1500 CPU 1516T-3 PN/DP gte V3.1.0..*
    • Siemens SIMATIC S7-1500 CPU 1516TF-3 PN/DP gte V3.1.0..*
    • Siemens SIMATIC S7-1500 CPU 1517-3 PN/DP gte V3.1.0..*
    • Siemens SIMATIC S7-1500 CPU 1517F-3 PN/DP gte V3.1.0..*
    • Siemens SIMATIC S7-1500 CPU 1517H-3 PN gte V3.1.0..*
    • Siemens SIMATIC S7-1500 CPU 1517T-3 PN/DP gte V3.1.0..*
    • Siemens SIMATIC S7-1500 CPU 1517TF-3 PN/DP gte V3.1.0..*
    • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP gte V3.1.0..*
    • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP gte V3.1.0..*
    • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP gte V3.1.0..*
    • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP gte V3.1.0..*
    • Siemens SIMATIC S7-1500 CPU 1518HF-4 PN gte V3.1.0..*
    • Siemens SIMATIC S7-1500 CPU 1518T-4 PN/DP gte V3.1.0..*
    • Siemens SIMATIC S7-1500 CPU 1518TF-4 PN/DP gte V3.1.0..*
    • Siemens SIMATIC S7-1500 Software Controller CPU 1507S F V3 gte V30.1.0..*
    • Siemens SIMATIC S7-1500 Software Controller CPU 1507S V3 gte V30.1.0..*
    • Siemens SIMATIC S7-1500 Software Controller CPU 1508S F V3 gte V30.1.0..*
    • Siemens SIMATIC S7-1500 Software Controller CPU 1508S T V3 gte V30.1.0..*
    • Siemens SIMATIC S7-1500 Software Controller CPU 1508S TF V3 gte V30.1.0..*
    • Siemens SIMATIC S7-1500 Software Controller CPU 1508S V3 gte V30.1.0..*
    • Siemens SIMATIC S7-1500 Software Controller Linux V3 gte V30.1.0..*
    • Siemens SIMATIC S7-PLCSIM Advanced gte V6.0..*
    • Siemens SIPLUS S7-1500 CPU 1517H-3 PN gte V3.1.0..*
    • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP gte V3.1.0..*
    • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP gte V3.1.0..*
    • Siemens SIPLUS S7-1500 CPU 1518F-4 PN/DP gte V3.1.0..*
    • Siemens SIPLUS S7-1500 CPU 1518HF-4 PN gte V3.1.0..*

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

    Metrics

    6.9

    Priority

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

    Source: Vendor (CNA), CVSS v4

    5.3

    CVSS v3

    Severity Medium on the scale from 0 to 10.

    Source: CVE.org, Siemens ProductCERT

    0.5 %

    EPSS score

    Low — model estimates < 1% exploitation likelihood.

    Source: FIRST EPSS, percentile 43.5

    Show all metrics
    Severity
    Medium
    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
    57.42 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
    6.9 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
    5.3
    CVSS v4

    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
    6.9
    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
    0.5 %
    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
    43.5
    High — this CVE ranks above the median of all CVEs scored today (rank ≥ 36%).
    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 · automatable · Technical impact: partial
    Source: CISA Vulnrichment, as of 11 February 2025
    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-203

    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

    The login functionality of the web server in affected devices does not normalize the response times of login attempts. An unauthenticated remote attacker could exploit this side-channel information to distinguish between valid and invalid usernames.

    Source: NVD (NIST), cvelistv5, siemens_advisory

    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
    SiemensSIMATIC Drive Controller CPU 1504D TF
    • ≥ V3.1.0
    • —
    SiemensSIMATIC Drive Controller CPU 1507D TF
    • ≥ V3.1.0
    • —
    SiemensSIMATIC ET 200SP CPU 1510SP F-1 PN
    • ≥ V3.1.0
    • —
    SiemensSIMATIC ET 200SP CPU 1510SP-1 PN
    • ≥ V3.1.0
    • —
    SiemensSIMATIC ET 200SP CPU 1512SP F-1 PN
    • ≥ V3.1.0
    • —
    SiemensSIMATIC ET 200SP CPU 1512SP-1 PN
    • ≥ V3.1.0
    • —
    SiemensSIMATIC ET 200SP CPU 1514SP F-2 PN
    • ≥ V3.1.0
    • —
    SiemensSIMATIC ET 200SP CPU 1514SP-2 PN
    • ≥ V3.1.0
    • —
    SiemensSIMATIC ET 200SP CPU 1514SPT F-2 PN
    • ≥ V3.1.0
    • —
    SiemensSIMATIC ET 200SP CPU 1514SPT-2 PN
    • ≥ V3.1.0
    • —
    SiemensSIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants)
    • ≥ V30.1.0
    • —
    SiemensSIMATIC S7-1200 CPU 1211C AC/DC/Rly
    • —
    • —
    SiemensSIMATIC S7-1200 CPU 1211C DC/DC/DC
    • —
    • —
    SiemensSIMATIC S7-1200 CPU 1211C DC/DC/Rly
    • —
    • —
    SiemensSIMATIC S7-1200 CPU 1212C AC/DC/Rly
    • —
    • —
    SiemensSIMATIC S7-1200 CPU 1212C DC/DC/DC
    • —
    • —
    SiemensSIMATIC S7-1200 CPU 1212C DC/DC/Rly
    • —
    • —
    SiemensSIMATIC S7-1200 CPU 1212FC DC/DC/DC
    • —
    • —
    SiemensSIMATIC S7-1200 CPU 1212FC DC/DC/Rly
    • —
    • —
    SiemensSIMATIC S7-1200 CPU 1214C AC/DC/Rly
    • —
    • —
    SiemensSIMATIC S7-1200 CPU 1214C DC/DC/DC
    • —
    • —
    SiemensSIMATIC S7-1200 CPU 1214C DC/DC/Rly
    • —
    • —
    SiemensSIMATIC S7-1200 CPU 1214FC DC/DC/DC
    • —
    • —
    SiemensSIMATIC S7-1200 CPU 1214FC DC/DC/Rly
    • —
    • —
    SiemensSIMATIC S7-1200 CPU 1215C AC/DC/Rly
    • —
    • —
    SiemensSIMATIC S7-1200 CPU 1215C DC/DC/DC
    • —
    • —
    SiemensSIMATIC S7-1200 CPU 1215C DC/DC/Rly
    • —
    • —
    SiemensSIMATIC S7-1200 CPU 1215FC DC/DC/DC
    • —
    • —
    SiemensSIMATIC S7-1200 CPU 1215FC DC/DC/Rly
    • —
    • —
    SiemensSIMATIC S7-1200 CPU 1217C DC/DC/DC
    • —
    • —
    SiemensSIMATIC S7-1500 CPU 1511-1 PN
    • ≥ V3.1.0
    • —
    SiemensSIMATIC S7-1500 CPU 1511C-1 PN
    • ≥ V3.1.0
    • —
    SiemensSIMATIC S7-1500 CPU 1511F-1 PN
    • ≥ V3.1.0
    • —
    SiemensSIMATIC S7-1500 CPU 1511T-1 PN
    • ≥ V3.1.0
    • —
    SiemensSIMATIC S7-1500 CPU 1511TF-1 PN
    • ≥ V3.1.0
    • —
    SiemensSIMATIC S7-1500 CPU 1512C-1 PN
    • ≥ V3.1.0
    • —
    SiemensSIMATIC S7-1500 CPU 1513-1 PN
    • ≥ V3.1.0
    • —
    SiemensSIMATIC S7-1500 CPU 1513F-1 PN
    • ≥ V3.1.0
    • —
    SiemensSIMATIC S7-1500 CPU 1513pro F-2 PN
    • ≥ V3.1.0
    • —
    SiemensSIMATIC S7-1500 CPU 1513pro-2 PN
    • ≥ V3.1.0
    • —
    SiemensSIMATIC S7-1500 CPU 1513R-1 PN
    • ≥ V3.1.0
    • —
    SiemensSIMATIC S7-1500 CPU 1515-2 PN
    • ≥ V3.1.0
    • —
    SiemensSIMATIC S7-1500 CPU 1515F-2 PN
    • ≥ V3.1.0
    • —
    SiemensSIMATIC S7-1500 CPU 1515R-2 PN
    • ≥ V3.1.0
    • —
    SiemensSIMATIC S7-1500 CPU 1515T-2 PN
    • ≥ V3.1.0
    • —
    SiemensSIMATIC S7-1500 CPU 1515TF-2 PN
    • ≥ V3.1.0
    • —
    SiemensSIMATIC S7-1500 CPU 1516-3 PN/DP
    • ≥ V3.1.0
    • —
    SiemensSIMATIC S7-1500 CPU 1516F-3 PN/DP
    • ≥ V3.1.0
    • —

    Vendors and products

    Weakness classes (CWE)

    • CWE-203Observable Discrepancy

      Base

      The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor.

      Entry at MITRE CWE-203

    References & sources

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    Badge preview for CVE-2023-37482
    <a href="https://intel.neosec.eu/en/cve/CVE-2023-37482"><img src="https://intel.neosec.eu/badge/cve/CVE-2023-37482.svg?lang=en" alt="CVE-2023-37482 – NEOSEC Intel" height="20"></a>