PatchSiren

PatchSiren cyber security CVE debrief

CVE-2024-42345 Siemens CVE debrief

A session management vulnerability in Siemens SINEMA Remote Connect Server allows remote attackers to bypass multi-factor authentication (MFA) during user session establishment. The affected application fails to properly handle session establishment and invalidation, enabling MFA circumvention. Siemens has released a vendor fix in version V3.2 SP2 or later. The vulnerability carries a CVSS 3.1 score of 4.3 (Medium severity) with network attack vector, low attack complexity, and low privileges required. Published September 10, 2024, this issue affects industrial remote connectivity infrastructure and should be prioritized for patching in environments where SINEMA Remote Connect Server manages secure remote access to OT/ICS networks.

Vendor
Siemens
Product
SINEMA Remote Connect Server
CVSS
MEDIUM 4.3
CISA KEV
Not listed in stored evidence
Original CVE published
2024-09-10
Original CVE updated
2024-09-10
Advisory published
2024-09-10
Advisory updated
2024-09-10

Who should care

Organizations operating Siemens SINEMA Remote Connect Server for remote access to industrial networks, particularly those in critical infrastructure sectors relying on MFA for secure remote connectivity. Security teams responsible for OT/ICS infrastructure, network administrators managing remote access solutions, and compliance officers ensuring authentication controls meet security requirements.

Technical summary

The vulnerability exists in the session establishment and invalidation logic of SINEMA Remote Connect Server. Improper handling of user sessions allows a remote attacker with low privileges to circumvent multi-factor authentication requirements when establishing a user session. The flaw does not require user interaction and can be exploited over the network with low attack complexity. The confidentiality impact is none, integrity impact is low, and availability impact is none per the CVSS vector. Siemens has addressed this in V3.2 SP2 through improved session management controls.

Defensive priority

medium

Recommended defensive actions

  • Apply vendor fix: Update SINEMA Remote Connect Server to V3.2 SP2 or later version
  • Review session management configurations for proper invalidation behavior
  • Implement network segmentation to limit exposure of SINEMA Remote Connect Server management interfaces
  • Monitor for anomalous authentication patterns that may indicate MFA bypass attempts
  • Apply defense-in-depth controls per CISA ICS recommended practices for industrial control systems

Evidence notes

Vulnerability description and remediation guidance sourced from CISA ICS advisory ICSA-24-256-01 and Siemens security advisory SSA-869574. CVSS vector confirms network-accessible attack with low complexity. Vendor fix explicitly identified as V3.2 SP2 or later.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-42345 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-42345

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

  • CVE-2024-42345 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-42345

    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-24-256-01.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/csaf/ssa-869574.json

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/html/ssa-869574.html

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-24-256-01

    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.