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PatchSiren cyber security CVE debrief

CVE-2024-35888 Siemens CVE debrief

A vulnerability in the Linux kernel's ERSPAN (Encapsulated Remote Switched Port Analyzer) networking subsystem could allow a local attacker to cause a denial of service. The issue stems from improper handling of the erspan_base_hdr structure within socket buffer (skb) memory, potentially leading to out-of-bounds access or memory corruption when the header is not properly present in skb->head. The vulnerability was resolved by ensuring the erspan_base_hdr is correctly present in the socket buffer head. Siemens has identified this vulnerability as affecting the GNU/Linux subsystem of the SIMATIC S7-1500 TM MFP industrial control device. No patch is currently available from Siemens; mitigation relies on restricting access to trusted personnel and running only trusted applications.

Vendor
Siemens
Product
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
CVSS
HIGH 7.3
CISA KEV
Not listed in stored evidence
Original CVE published
2024-05-19
Original CVE updated
2026-08-04
Advisory published
2024-05-19
Advisory updated
2026-08-04

Who should care

Organizations operating Siemens SIMATIC S7-1500 TM MFP devices with enabled GNU/Linux subsystems, particularly in industrial control system (ICS/OT) environments. Security teams responsible for OT network segmentation and access control. System integrators and maintenance personnel with shell access to affected devices.

Technical summary

The vulnerability exists in the Linux kernel's ERSPAN (Encapsulated Remote Switched Port Analyzer) implementation, specifically in how the erspan_base_hdr structure is handled within socket buffer (skb) memory. The fix ensures this header is properly present in skb->head, preventing potential memory safety issues. The CVSS 3.1 score of 5.5 (MEDIUM) reflects a local attack vector requiring low privileges but resulting in high availability impact through denial of service. The affected product is the GNU/Linux subsystem of Siemens SIMATIC S7-1500 TM MFP, an industrial automation device. No firmware patch is currently available; risk reduction depends on operational security controls.

Defensive priority

medium

Recommended defensive actions

  • Restrict interactive shell access to the GNU/Linux subsystem to trusted personnel only
  • Build and run applications only from trusted sources
  • Monitor for future Siemens security advisories for patch availability
  • Apply defense-in-depth strategies for industrial control systems per CISA guidance

Evidence notes

CVE published 2024-04-09. CISA CSAF advisory ICSA-24-102-01 first published same date. Siemens advisory SSA-265688 cross-referenced. CVSS 3.1 vector AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H indicates local attack vector with low attack complexity, low privileges required, and high availability impact. No known exploitation in the wild per available sources. Not listed in CISA KEV catalog.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-35888 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-35888

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

  • CVE-2024-35888 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-35888

    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-24-102-01.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/csaf/ssa-265688.json

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/html/ssa-265688.html

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-24-102-01

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/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://www.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.