HighCVE-2023-46156

    Siemens SIMATIC Drive Controller CPU 1504D TF: Use After Free (CVE-2023-46156)

    Published Sources: CVE.org, Siemens ProductCERT

    What is affected, what to do

    Affected devices improperly handle specially crafted packets sent to port 102/tcp. This could allow an attacker to create a denial of service condition.

    Update Siemens Simatic Drive Controller CPU 1504d Tf Firmware to version 3.1.0, Siemens Simatic Drive Controller CPU 1507d Tf Firmware to version 3.1.0, Siemens Simatic S7-1500 CPU 1510sp F-1 Pn Firmware to version 3.1.0.

    Affected
    • Siemens Simatic Drive Controller CPU 1504d Tf Firmware lt *..3.1.0
    • Siemens Simatic Drive Controller CPU 1507d Tf Firmware lt *..3.1.0
    • Siemens Simatic S7-1500 CPU 1510sp F-1 Pn Firmware lt *..3.1.0
    • Siemens Simatic S7-1500 CPU 1510sp-1 Pn Firmware lt *..3.1.0
    • Siemens Simatic S7-1500 CPU 1511-1 Pn Firmware lt *..3.1.0
    • Siemens Simatic S7-1500 CPU 1511c-1 Pn Firmware lt *..3.1.0
    • Siemens Simatic S7-1500 CPU 1511f-1 Pn Firmware lt *..3.1.0
    • Siemens Simatic S7-1500 CPU 1511t-1 Pn Firmware lt *..3.1.0
    • Siemens Simatic S7-1500 CPU 1511tf-1 Pn Firmware lt *..3.1.0
    • Siemens Simatic S7-1500 CPU 1512c-1 Pn Firmware lt *..3.1.0
    • Siemens Simatic S7-1500 CPU 1512sp F-1 Pn Firmware lt *..3.1.0
    • Siemens Simatic S7-1500 CPU 1512sp-1 Pn Firmware lt *..3.1.0
    • Siemens Simatic S7-1500 CPU 1513-1 Pn Firmware lt *..3.1.0
    • Siemens Simatic S7-1500 CPU 1513f-1 Pn Firmware lt *..3.1.0
    • Siemens Simatic S7-1500 CPU 1513r-1 Pn Firmware lt *..3.1.0
    • Siemens Simatic S7-1500 CPU 1514sp F-2 Pn Firmware lt *..3.1.0
    • Siemens Simatic S7-1500 CPU 1514sp-2 Pn Firmware lt *..3.1.0
    • Siemens Simatic S7-1500 CPU 1514spt F-2 Pn Firmware lt *..3.1.0
    • Siemens Simatic S7-1500 CPU 1514spt-2 Pn Firmware lt *..3.1.0
    • Siemens Simatic S7-1500 CPU 1515-2 Pn Firmware lt *..3.1.0
    • Siemens Simatic S7-1500 CPU 1515f-2 Pn Firmware lt *..3.1.0
    • Siemens Simatic S7-1500 CPU 1515r-2 Pn Firmware lt *..3.1.0
    • Siemens Simatic S7-1500 CPU 1515t-2 Pn Firmware lt *..3.1.0
    • Siemens Simatic S7-1500 CPU 1515tf-2 Pn Firmware lt *..3.1.0
    • Siemens Simatic S7-1500 CPU 1516-3 Pn\/dp Firmware lt *..3.1.0
    • Siemens Simatic S7-1500 CPU 1516f-3 Pn\/dp Firmware lt *..3.1.0
    • Siemens Simatic S7-1500 CPU 1516t-3 Pn\/dp Firmware lt *..3.1.0
    • Siemens Simatic S7-1500 CPU 1517-3 Pn\/dp Firmware lt *..3.1.0
    • Siemens Simatic S7-1500 CPU 1517f-3 Pn\/dp Firmware lt *..3.1.0
    • Siemens Simatic S7-1500 CPU 1517h-3 Pn Firmware lt *..3.1.0
    • Siemens Simatic S7-1500 CPU 1517t-3 Pn\/dp Firmware lt *..3.1.0
    • Siemens Simatic S7-1500 CPU 1517tf-3 Pn\/dp Firmware lt *..3.1.0
    • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP Firmware lt *..3.1.0
    • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP Firmware lt *..3.1.0
    • Siemens Simatic S7-1500 CPU 1518hf-4 Pn Firmware lt *..3.1.0
    • Siemens Simatic S7-1500 CPU 1518t-4 Pn\/dp Firmware lt *..3.1.0
    • Siemens Simatic S7-1500 CPU 1518tf-4 Pn\/dp Firmware lt *..3.1.0
    • Siemens Simatic S7-1500 CPU S7-1518-4 Pn\/dp Odk Firmware lt *..3.1.0
    • Siemens Simatic S7-1500 CPU S7-1518f-4 Pn\/dp Odk Firmware lt *..3.1.0
    • Siemens Simatic S7-1500 Et 200pro\ eq _cpu_1513pro_f-2_pn_firmware.._cpu_1513pro_f-2_pn_firmware
    • Siemens Simatic S7-1500 Et 200pro\ eq _cpu_1513pro-2_pn_firmware.._cpu_1513pro-2_pn_firmware
    • Siemens Simatic S7-1500 Et 200pro\ eq _cpu_1516pro_f-2_pn_firmware.._cpu_1516pro_f-2_pn_firmware
    • Siemens Simatic S7-1500 Et 200pro\ eq cpu_1516pro-2_pn_firmware..cpu_1516pro-2_pn_firmware
    • Siemens Simatic S7-plcsim Advanced Firmware lt *..6.0
    • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP Firmware lt *..3.1.0
    • Siemens Siplus S7-1500 CPU 1518-4 Pn\/dp Mfp Firmware lt *..3.1.0
    • Siemens Siplus S7-1500 CPU 1518f-4 Pn\/dp Firmware lt *..3.1.0
    Fixed in
    • Siemens Simatic Drive Controller CPU 1504d Tf Firmware 3.1.0
    • Siemens Simatic Drive Controller CPU 1507d Tf Firmware 3.1.0
    • Siemens Simatic S7-1500 CPU 1510sp F-1 Pn Firmware 3.1.0
    • Siemens Simatic S7-1500 CPU 1510sp-1 Pn Firmware 3.1.0
    • Siemens Simatic S7-1500 CPU 1511-1 Pn Firmware 3.1.0
    • Siemens Simatic S7-1500 CPU 1511c-1 Pn Firmware 3.1.0
    • Siemens Simatic S7-1500 CPU 1511f-1 Pn Firmware 3.1.0
    • Siemens Simatic S7-1500 CPU 1511t-1 Pn Firmware 3.1.0
    • Siemens Simatic S7-1500 CPU 1511tf-1 Pn Firmware 3.1.0
    • Siemens Simatic S7-1500 CPU 1512c-1 Pn Firmware 3.1.0
    • Siemens Simatic S7-1500 CPU 1512sp F-1 Pn Firmware 3.1.0
    • Siemens Simatic S7-1500 CPU 1512sp-1 Pn Firmware 3.1.0
    • Siemens Simatic S7-1500 CPU 1513-1 Pn Firmware 3.1.0
    • Siemens Simatic S7-1500 CPU 1513f-1 Pn Firmware 3.1.0
    • Siemens Simatic S7-1500 CPU 1513r-1 Pn Firmware 3.1.0
    • Siemens Simatic S7-1500 CPU 1514sp F-2 Pn Firmware 3.1.0
    • Siemens Simatic S7-1500 CPU 1514sp-2 Pn Firmware 3.1.0
    • Siemens Simatic S7-1500 CPU 1514spt F-2 Pn Firmware 3.1.0
    • Siemens Simatic S7-1500 CPU 1514spt-2 Pn Firmware 3.1.0
    • Siemens Simatic S7-1500 CPU 1515-2 Pn Firmware 3.1.0
    • Siemens Simatic S7-1500 CPU 1515f-2 Pn Firmware 3.1.0
    • Siemens Simatic S7-1500 CPU 1515r-2 Pn Firmware 3.1.0
    • Siemens Simatic S7-1500 CPU 1515t-2 Pn Firmware 3.1.0
    • Siemens Simatic S7-1500 CPU 1515tf-2 Pn Firmware 3.1.0
    • Siemens Simatic S7-1500 CPU 1516-3 Pn\/dp Firmware 3.1.0
    • Siemens Simatic S7-1500 CPU 1516f-3 Pn\/dp Firmware 3.1.0
    • Siemens Simatic S7-1500 CPU 1516t-3 Pn\/dp Firmware 3.1.0
    • Siemens Simatic S7-1500 CPU 1517-3 Pn\/dp Firmware 3.1.0
    • Siemens Simatic S7-1500 CPU 1517f-3 Pn\/dp Firmware 3.1.0
    • Siemens Simatic S7-1500 CPU 1517h-3 Pn Firmware 3.1.0
    • Siemens Simatic S7-1500 CPU 1517t-3 Pn\/dp Firmware 3.1.0
    • Siemens Simatic S7-1500 CPU 1517tf-3 Pn\/dp Firmware 3.1.0
    • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP Firmware 3.1.0
    • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP Firmware 3.1.0
    • Siemens Simatic S7-1500 CPU 1518hf-4 Pn Firmware 3.1.0
    • Siemens Simatic S7-1500 CPU 1518t-4 Pn\/dp Firmware 3.1.0
    • Siemens Simatic S7-1500 CPU 1518tf-4 Pn\/dp Firmware 3.1.0
    • Siemens Simatic S7-1500 CPU S7-1518-4 Pn\/dp Odk Firmware 3.1.0
    • Siemens Simatic S7-1500 CPU S7-1518f-4 Pn\/dp Odk Firmware 3.1.0
    • Siemens Simatic S7-plcsim Advanced Firmware 6.0
    • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP Firmware 3.1.0
    • Siemens Siplus S7-1500 CPU 1518-4 Pn\/dp Mfp Firmware 3.1.0
    • Siemens Siplus S7-1500 CPU 1518f-4 Pn\/dp Firmware 3.1.0

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

    Metrics

    7.5

    Priority

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

    Source: Vendor (CNA), CVSS v3

    7.5

    CVSS v3

    Severity High on the scale from 0 to 10.

    Source: CVE.org, Siemens ProductCERT

    1.2 %

    EPSS score

    Moderate — model estimates 1-10% exploitation likelihood.

    Source: FIRST EPSS, percentile 69.2

    Show all metrics
    Severity
    High
    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
    79.83 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
    7.5 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
    7.5
    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
    1.2 %
    Moderate — model estimates 1-10% 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
    69.2
    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 6 January 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-416

    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

    Affected devices improperly handle specially crafted packets sent to port 102/tcp. This could allow an attacker to create a denial of service condition. A restart is needed to restore normal operations.

    Source: NVD (NIST), siemens_advisory, 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
    SiemensSIMATIC Drive Controller CPU 1504D TF
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    SiemensSIMATIC Drive Controller CPU 1507D TF
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    SiemensSIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants)
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    SiemensSIMATIC S7-1500 CPU 1510SP F-1 PN
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    SiemensSIMATIC S7-1500 CPU 1510SP-1 PN
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    SiemensSIMATIC S7-1500 CPU 1511-1 PN
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    SiemensSIMATIC S7-1500 CPU 1511C-1 PN
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    SiemensSIMATIC S7-1500 CPU 1511F-1 PN
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    SiemensSIMATIC S7-1500 CPU 1511T-1 PN
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    SiemensSIMATIC S7-1500 CPU 1511TF-1 PN
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    SiemensSIMATIC S7-1500 CPU 1512C-1 PN
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    SiemensSIMATIC S7-1500 CPU 1512SP F-1 PN
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    SiemensSIMATIC S7-1500 CPU 1512SP-1 PN
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    SiemensSIMATIC S7-1500 CPU 1513-1 PN
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    SiemensSIMATIC S7-1500 CPU 1513F-1 PN
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    SiemensSIMATIC S7-1500 CPU 1513R-1 PN
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    SiemensSIMATIC S7-1500 CPU 1514SP F-2 PN
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    SiemensSIMATIC S7-1500 CPU 1514SP-2 PN
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    SiemensSIMATIC S7-1500 CPU 1514SPT F-2 PN
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    SiemensSIMATIC S7-1500 CPU 1514SPT-2 PN
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    SiemensSIMATIC S7-1500 CPU 1515-2 PN
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    SiemensSIMATIC S7-1500 CPU 1515F-2 PN
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    SiemensSIMATIC S7-1500 CPU 1515R-2 PN
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    SiemensSIMATIC S7-1500 CPU 1515T-2 PN
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    SiemensSIMATIC S7-1500 CPU 1515TF-2 PN
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    SiemensSIMATIC S7-1500 CPU 1516-3 PN/DP
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    SiemensSIMATIC S7-1500 CPU 1516F-3 PN/DP
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    SiemensSIMATIC S7-1500 CPU 1516T-3 PN/DP
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    SiemensSIMATIC S7-1500 CPU 1516TF-3 PN/DP
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    SiemensSIMATIC S7-1500 CPU 1517-3 PN/DP
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    SiemensSIMATIC S7-1500 CPU 1517F-3 PN/DP
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    SiemensSIMATIC S7-1500 CPU 1517H-3 PN
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    SiemensSIMATIC S7-1500 CPU 1517T-3 PN/DP
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    SiemensSIMATIC S7-1500 CPU 1517TF-3 PN/DP
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    SiemensSIMATIC S7-1500 CPU 1518-4 PN/DP
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    SiemensSIMATIC S7-1500 CPU 1518-4 PN/DP MFP
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    SiemensSIMATIC S7-1500 CPU 1518F-4 PN/DP
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    SiemensSIMATIC S7-1500 CPU 1518F-4 PN/DP MFP
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    SiemensSIMATIC S7-1500 CPU 1518HF-4 PN
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    SiemensSIMATIC S7-1500 CPU 1518T-4 PN/DP
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    SiemensSIMATIC S7-1500 CPU 1518TF-4 PN/DP
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    SiemensSIMATIC S7-1500 CPU S7-1518-4 PN/DP ODK
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    SiemensSIMATIC S7-1500 CPU S7-1518F-4 PN/DP ODK
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    SiemensSIMATIC S7-1500 ET 200pro: CPU 1513PRO F-2 PN
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    SiemensSIMATIC S7-1500 ET 200pro: CPU 1513PRO-2 PN
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    SiemensSIMATIC S7-1500 ET 200pro: CPU 1516PRO F-2 PN
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    SiemensSIMATIC S7-1500 ET 200pro: CPU 1516PRO-2 PN
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    SiemensSIMATIC S7-1500 Software Controller
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    Vendors and products

    Affected operating systems

    Affected operating systems
    Othersiemenssimatic_drive_controller_cpu_1504d_tf_firmware—
    Othersiemenssimatic_drive_controller_cpu_1507d_tf_firmware—
    Othersiemenssimatic_et_200sp_open_control_1515sp_pc2_firmware—
    Othersiemenssimatic_s7-1500_cpu_1510sp-1_pn_firmware—
    Othersiemenssimatic_s7-1500_cpu_1510sp_f-1_pn_firmware—
    Othersiemenssimatic_s7-1500_cpu_1511-1_pn_firmware—
    Othersiemenssimatic_s7-1500_cpu_1511c-1_pn_firmware—
    Othersiemenssimatic_s7-1500_cpu_1511f-1_pn_firmware—
    Othersiemenssimatic_s7-1500_cpu_1511t-1_pn_firmware—
    Othersiemenssimatic_s7-1500_cpu_1511tf-1_pn_firmware—
    Othersiemenssimatic_s7-1500_cpu_1512c-1_pn_firmware—
    Othersiemenssimatic_s7-1500_cpu_1512sp-1_pn_firmware—
    Othersiemenssimatic_s7-1500_cpu_1512sp_f-1_pn_firmware—
    Othersiemenssimatic_s7-1500_cpu_1513-1_pn_firmware—
    Othersiemenssimatic_s7-1500_cpu_1513f-1_pn_firmware—
    Othersiemenssimatic_s7-1500_cpu_1513r-1_pn_firmware—
    Othersiemenssimatic_s7-1500_cpu_1514sp-2_pn_firmware—
    Othersiemenssimatic_s7-1500_cpu_1514sp_f-2_pn_firmware—
    Othersiemenssimatic_s7-1500_cpu_1514spt-2_pn_firmware—
    Othersiemenssimatic_s7-1500_cpu_1514spt_f-2_pn_firmware—
    Othersiemenssimatic_s7-1500_cpu_1515-2_pn_firmware—
    Othersiemenssimatic_s7-1500_cpu_1515f-2_pn_firmware—
    Othersiemenssimatic_s7-1500_cpu_1515r-2_pn_firmware—
    Othersiemenssimatic_s7-1500_cpu_1515t-2_pn_firmware—

    Weakness classes (CWE)

    • CWE-416Use After Free

      Variant

      The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

      Entry at MITRE CWE-416

    References & sources

    Embed badge

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    Badge preview for CVE-2023-46156
    <a href="https://intel.neosec.eu/en/cve/CVE-2023-46156"><img src="https://intel.neosec.eu/badge/cve/CVE-2023-46156.svg?lang=en" alt="CVE-2023-46156 – NEOSEC Intel" height="20"></a>