CriticalCVE-2023-4299

    Digi RealPort Protocol Use of Password Hash Instead of Password for Authentication (CVE-2023-4299)

    Published Sources: CISA ICS, CVE.org

    What is affected, what to do

    Digi RealPort Protocol is vulnerable to a replay attack that may allow an attacker to bypass authentication to access connected equipment.

    Update Digi ConnectPort TS 8/16 to version 2.26.2.4, Digi ConnectPort LTS 8/16/32 to version 1.4.9, Digi Connect ES to version 2.26.2.4.

    Affected
    • Digi RealPort lte *..4.8.488.0
    • Digi RealPort lte *..1.9-40
    • Digi ConnectPort TS 8/16 lt *..2.26.2.4
    • Digi Passport Console Server eq all versions..all versions
    • Digi ConnectPort LTS 8/16/32 lt *..1.4.9
    • Digi CM Console Server eq all versions..all versions
    • Digi PortServer TS eq all versions..all versions
    • Digi PortServer TS MEI eq all versions..all versions
    • Digi PortServer TS MEI Hardened eq all versions..all versions
    • Digi PortServer TS M MEI eq all versions..all versions
    • Digi PortServer TS P MEI eq all versions..all versions
    • Digi One IAP Family eq all versions..all versions
    • Digi One IA eq all versions..all versions
    • Digi One SP IA eq all versions..all versions
    • Digi International ​Digi One SP eq all versions..all versions
    • Digi WR31 eq all versions..all versions
    • Digi WR11 XT eq all versions..all versions
    • Digi WR44 R eq all versions..all versions
    • Digi WR21 eq all versions..all versions
    • Digi Connect ES lt *..2.26.2.4
    • Digi Connect SP eq all versions..all versions
    Fixed in
    • Digi ConnectPort TS 8/16 2.26.2.4
    • Digi ConnectPort LTS 8/16/32 1.4.9
    • Digi Connect ES 2.26.2.4

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

    Metrics

    9.0

    Priority

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

    Source: Vendor (CNA), CVSS v3

    9.0

    CVSS v3

    Severity Critical on the scale from 0 to 10.

    Source: CISA ICS, CVE.org

    0.7 %

    EPSS score

    Low — model estimates < 1% exploitation likelihood.

    Source: FIRST EPSS, percentile 52.4

    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
    70.31 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
    9.0 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
    9.0
    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
    0.7 %
    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
    52.4
    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 · not automatable · Technical impact: total
    Source: CISA Vulnrichment, as of 16 January 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-836

    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

    Digi RealPort Protocol is vulnerable to a replay attack that may allow an attacker to bypass authentication to access connected equipment.

    Source: cisa_ics_advisory, 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
    Digi InternationalDigi CM Console Server
    • all versions
    • —
    Digi InternationalDigi Connect ES
    • < 2.26.2.4
    • 2.26.2.4
    Digi InternationalDigi Connect SP
    • all versions
    • —
    Digi InternationalDigi ConnectPort LTS 8/16/32
    • < 1.4.9
    • 1.4.9
    Digi InternationalDigi ConnectPort TS 8/16
    • < 2.26.2.4
    • 2.26.2.4
    Digi InternationalDigi One IA
    • all versions
    • —
    Digi InternationalDigi One IAP Family
    • all versions
    • —
    Digi InternationalDigi One SP IA
    • all versions
    • —
    Digi InternationalDigi Passport Console Server
    • all versions
    • —
    Digi InternationalDigi PortServer TS
    • all versions
    • —
    Digi InternationalDigi PortServer TS M MEI
    • all versions
    • —
    Digi InternationalDigi PortServer TS MEI
    • all versions
    • —
    Digi InternationalDigi PortServer TS MEI Hardened
    • all versions
    • —
    Digi InternationalDigi PortServer TS P MEI
    • all versions
    • —
    Digi InternationalDigi RealPort
    • ≤ 4.8.488.0
    • ≤ 1.9-40
    • —
    • —
    Digi InternationalDigi WR11 XT
    • all versions
    • —
    Digi InternationalDigi WR21
    • all versions
    • —
    Digi InternationalDigi WR31
    • all versions
    • —
    Digi InternationalDigi WR44 R
    • all versions
    • —
    Digi International​Digi One SP
    • all versions
    • —
    digirealport
    • ≤ 1.9-40
    • ≤ 4.8.488.0
    • —
    • —

    Vendors and products

    Affected operating systems

    Affected operating systems
    Otherdigicm_firmware—
    Otherdigiconnect_es_firmware—
    Otherdigiconnect_sp_firmware—
    Otherdigiconnectport_lts_8\/16\/32_firmware—
    Otherdigiconnectport_ts_8\/16_firmware—
    Otherdigione_ia_firmware—
    Otherdigione_iap_firmware—
    Otherdigione_sp_firmware—
    Otherdigione_sp_ia_firmware—
    Otherdigipassport_firmware—
    Otherdigiportserver_ts_firmware—
    Otherdigiportserver_ts_m_mei_firmware—
    Otherdigiportserver_ts_mei_firmware—
    Otherdigiportserver_ts_mei_hardened_firmware—
    Otherdigiportserver_ts_p_mei_firmware—
    Otherdigitransport_wr11_xt_firmware—
    Otherdigiwr21_firmware—
    Otherdigiwr31_firmware—
    Otherdigiwr44_r_firmware—

    Weakness classes (CWE)

    • CWE-836Use of Password Hash Instead of Password for Authentication

      Base

      The product records password hashes in a data store, receives a hash of a password from a client, and compares the supplied hash to the hash obtained from the data store.

      Entry at MITRE CWE-836

    References & sources

    • cisa.govnews-events/ics-advisories/icsa-23-243-04Third-party advisory, US government resource
    • digi.comgetattachment/resources/security/alerts/realport-cves/Dragos-Di…Vendor advisory
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