PatchSiren

PatchSiren cyber security CVE debrief

CVE-2024-41977 Siemens CVE debrief

CVE-2024-41977 is a HIGH severity (CVSS 7.1) session isolation vulnerability in Siemens industrial routers. Published 2024-08-13, the flaw affects 24 Siemens SCALANCE and RUGGEDCOM router models where the web server component fails to properly enforce isolation between user sessions. An authenticated remote attacker can exploit this weakness to escalate privileges on affected devices. The vulnerability requires network access, low privileges, and user interaction, with high impact to confidentiality, integrity, and availability. Siemens has released firmware version 8.1 or later to address this issue across all affected product lines.

Vendor
Siemens
Product
RUGGEDCOM RM1224 LTE(4G) EU (6GK6108-4AM00-2BA2)
CVSS
HIGH 7.1
CISA KEV
Not listed in stored evidence
Original CVE published
2024-08-13
Original CVE updated
2024-08-13
Advisory published
2024-08-13
Advisory updated
2024-08-13

Who should care

Organizations operating Siemens SCALANCE M-800, MUM800, S615, or RUGGEDCOM RM1224 industrial routers in manufacturing, energy, transportation, and critical infrastructure sectors. Security teams responsible for OT/ICS network security, network administrators managing industrial router infrastructure, and compliance officers tracking CVE remediation in operational technology environments.

Technical summary

The vulnerability exists in the web server component of affected Siemens industrial routers. Insufficient session isolation allows an authenticated attacker to cross session boundaries and escalate privileges. The attack requires network connectivity to the device, valid low-privilege credentials, and user interaction. Successful exploitation grants high impact across confidentiality, integrity, and availability dimensions. The vulnerability is rated HIGH severity with CVSS 7.1. Remediation is available through firmware update to version 8.1 or later.

Defensive priority

HIGH

Recommended defensive actions

  • Update affected Siemens SCALANCE and RUGGEDCOM routers to firmware version 8.1 or later
  • Restrict network access to router web management interfaces to authorized administrative hosts only
  • Implement network segmentation to isolate industrial control system networks from enterprise and internet-facing networks
  • Monitor for unauthorized privilege escalation attempts or anomalous administrative session activity
  • Apply principle of least privilege for all accounts with access to affected router management interfaces
  • Review and rotate credentials for administrative accounts on affected devices
  • Consider disabling web-based management if not required, using alternative secure management methods

Evidence notes

Vulnerability disclosed in CISA ICS Advisory ICSA-24-228-01 and Siemens Security Advisory SSA-087301. Affects 24 router models across SCALANCE M-800, MUM800, and RUGGEDCOM RM1224 families. CVSS 3.1 vector: AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-41977 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-41977

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

  • CVE-2024-41977 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-41977

    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-24-228-01.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/csaf/ssa-087301.json

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/html/ssa-087301.html

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-24-228-01

    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.