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PatchSiren cyber security CVE debrief

CVE-2024-51447 Siemens CVE debrief

CVE-2024-51447 is a medium-severity information-disclosure issue in Siemens Polarion's login flow. The CISA CSAF advisory and Siemens product advisory describe an observable response discrepancy during username validation, which can let an unauthenticated remote attacker determine whether a username is valid. While this does not affect integrity or availability, it can expose account-enumeration signals that increase reconnaissance risk.

Vendor
Siemens
Product
Polarion V2310
CVSS
MEDIUM 5.3
CISA KEV
Not listed in stored evidence
Original CVE published
2025-05-13
Original CVE updated
2025-05-13
Advisory published
2025-05-13
Advisory updated
2025-05-13

Who should care

Security, application, and vulnerability-management teams running Siemens Polarion V2310 or V2404 should care, especially if the login page is reachable from untrusted networks. Identity and SOC teams should also track it because the issue can reveal whether accounts exist.

Technical summary

The affected login implementation returns distinguishable responses when checking usernames. According to the supplied advisory data, Polarion V2310 and Polarion V2404 are affected, and the reported CVSS vector is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N (5.3, Medium), consistent with unauthenticated network exposure and limited confidentiality impact.

Defensive priority

Medium. This is not a code-execution or denial-of-service issue, but it can be used for user-enumeration reconnaissance against exposed authentication surfaces. Prioritize it for any internet-facing deployment or any environment where account privacy is important.

Recommended defensive actions

  • Update Siemens Polarion V2404 to V2404.2 or later, as stated in the vendor remediation guidance.
  • For Polarion V2310, track Siemens guidance closely because the supplied advisory states that no fix is currently planned.
  • Review the login workflow to ensure username-validation responses are consistent and do not reveal account existence through observable differences.
  • Apply CISA ICS recommended-practices and defense-in-depth guidance to reduce exposure of the application and authentication surface.
  • Monitor the Siemens advisory SSA-162255 and the CISA advisory ICSA-25-135-11 for any updates or revised remediation advice.

Evidence notes

This debrief is based only on the supplied CISA CSAF source item ICSA-25-135-11 and the referenced Siemens advisory SSA-162255, plus the provided CVE metadata. Those sources explicitly state that the login implementation can return an observable response discrepancy when validating usernames, allowing an unauthenticated remote attacker to distinguish valid from invalid usernames. The supplied remediation data lists no fix planned for Polarion V2310 and an update path of V2404.2 or later for Polarion V2404.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-51447 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-51447

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2024-51447 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-51447

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2025/icsa-25-135-11.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/csaf/ssa-162255.json

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/html/ssa-162255.html

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-25-135-11

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/resources-tools/resources/ics-recommended-practices

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/topics/industrial-control-systems

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://us-cert.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf

    Reference

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.