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PatchSiren cyber security CVE debrief

CVE-2024-30321 Siemens CVE debrief

A medium-severity information disclosure vulnerability in Siemens SIMATIC WinCC and PCS 7 products allows unauthenticated remote attackers to retrieve privileged information including user credentials through improper handling of web application requests. The vulnerability affects six product variants across the SIMATIC WinCC and PCS 7 product lines, with vendor fixes available for all affected versions as of the November 2024 advisory update.

Vendor
Siemens
Product
SIMATIC PCS 7 V9.1
CVSS
MEDIUM 5.9
CISA KEV
Not listed in stored evidence
Original CVE published
2024-07-09
Original CVE updated
2024-11-12
Advisory published
2024-07-09
Advisory updated
2024-11-12

Who should care

Organizations operating Siemens SIMATIC WinCC or SIMATIC PCS 7 V9.1 in industrial control system environments, particularly those with web-facing or internally accessible HMI/SCADA interfaces. Critical infrastructure operators, manufacturing facilities, and process industries using affected versions should prioritize assessment and patching.

Technical summary

The affected Siemens SIMATIC products contain a web application component that fails to properly validate or handle certain incoming requests. This improper request handling allows an unauthenticated remote attacker to extract privileged information, specifically including user account names and passwords. The vulnerability is network-exploitable with high attack complexity, requiring no privileges or user interaction. The confidentiality impact is rated high, with no direct integrity or availability impact. The attack vector is network-based, affecting the web application interface of the industrial control system software.

Defensive priority

medium

Recommended defensive actions

  • Apply vendor-provided updates: SIMATIC PCS 7 V9.1 to SP2 UC05 or later; SIMATIC WinCC V7.4 to SP1 Update 23 or later; SIMATIC WinCC V7.5 to SP2 Update 17 or later; SIMATIC WinCC V8.0 to Update 5 or later; SIMATIC WinCC V
  • Apply vendor-provided updates: SIMATIC WinCC Runtime Professional V18 to Update 5 or later; SIMATIC WinCC Runtime Professional V19 to Update 2 or later
  • Restrict access to application webserver to trusted users only as interim workaround if patching is not immediately feasible
  • Review and rotate potentially exposed credentials following organizational incident response procedures
  • Monitor web application access logs for anomalous unauthenticated request patterns

Evidence notes

CVE published 2024-07-09; CISA advisory ICSA-24-193-16 published same date. Advisory revised 2024-09-10 to add fix for SIMATIC PCS 7 V9.1, and again 2024-11-12 to add fix for SIMATIC WinCC Runtime Professional V18. CVSS 5.9 (MEDIUM) per source. Not listed in CISA KEV.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-30321 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-30321

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

  • CVE-2024-30321 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-30321

    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/2024/icsa-24-193-16.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/csaf/ssa-883918.json

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/html/ssa-883918.html

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-24-193-16

    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.