Siemens Industrial Edge Devices  – All CISA Advisories

As of January 10, 2023, CISA will no longer be updating ICS security advisories for Siemens product vulnerabilities beyond the initial advisory. For the most up-to-date information on vulnerabilities in this advisory, please see Siemens’ ProductCERT Security Advisories (CERT Services | Services | Siemens Global).

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1. EXECUTIVE SUMMARY

• CVSS v4 9.3
• ATTENTION: Exploitable remotely/low attack complexity
• Vendor: Siemens
• Equipment: Industrial Edge Devices
• Vulnerability: Weak Authentication

2. RISK EVALUATION

Successful exploitation of the vulnerability could allow an unauthenticated attacker to bypass authentication and impersonate a legitimate user.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

Siemens reports that the following products are affected:

• Siemens Industrial Edge Own Device (IEOD): All versions prior to V1.21.1-1-a
• Siemens Industrial Edge Virtual Device: All versions prior to V1.21.1-1-a
• Siemens SCALANCE LPE9413 (6GK5998-3GS01-2AC2): All versions
• Siemens SIMATIC IPC127E Industrial Edge Device: All versions prior to V3.0
• Siemens SIMATIC IPC227E Industrial Edge Device: All versions prior V3.0
• Siemens SIMATIC IPC427E Industrial Edge Device: All versions
• Siemens SIMATIC IPC847E Industrial Edge Device: All versions prior V3.0
• Siemens SIMATIC IPC BX-39A Industrial Edge Device: All versions prior V3.0
• Siemens SIMATIC IPC BX-59A Industrial Edge Device: All versions prior V3.0

3.2 VULNERABILITY OVERVIEW

3.2.1 WEAK AUTHENTICATION CWE-1390

The affected devices do not properly enforce user authentication on specific API endpoints when identity federation is used. This could facilitate an unauthenticated remote attacker to circumvent authentication and impersonate a legitimate user.

CVE-2024-54092 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been calculated; the CVSS vector string is (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

A CVSS v4 score has also been calculated for CVE-2024-54092. A base score of 9.3 has been calculated; the CVSS vector string is (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N).

3.3 BACKGROUND

• CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
• COUNTRIES/AREAS DEPLOYED: Worldwide
• COMPANY HEADQUARTERS LOCATION: Germany

3.4 RESEARCHER

Siemens reported this vulnerability to CISA.

4. MITIGATIONS

Siemens has identified the following specific workarounds and mitigations users can apply to reduce risk:

• SCALANCE LPE9413 (6GK5998-3GS01-2AC2), SIMATIC IPC427E Industrial Edge Device: Currently no fix is available
• Industrial Edge Virtual Device: Update to V1.21.1-1-a or later version
• Industrial Edge Own Device (IEOD): Update to V1.21.1-1-a or later version
• SIMATIC IPC BX-39A Industrial Edge Device, SIMATIC IPC BX-59A Industrial Edge Device, SIMATIC IPC127E Industrial Edge Device, SIMATIC IPC227E Industrial Edge Device, SIMATIC IPC847E Industrial Edge Device: Update to V3.0 or later version
• Ensure network access to affected products is limited to trusted parties only

As a general security measure, Siemens recommends protecting network access to devices with appropriate mechanisms. To operate the devices in a protected IT environment, Siemens recommends configuring the environment according to Siemens’ operational guidelines for industrial security and following recommendations in the product manuals.

Additional information on industrial security by Siemens can be found on the Siemens industrial security webpage

For more information see the associated Siemens security advisory SSA-634640 in HTML and CSAF.

CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability, such as:

• Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the internet.
• Locate control system networks and remote devices behind firewalls and isolating them from business networks.
• When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs). Recognize VPNs may have vulnerabilities, should be updated to the most recent version available, and are only as secure as the connected devices.

CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.

CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.

CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.

Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov in the technical information paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies.

Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.

CISA also recommends users take the following measures to protect themselves from social engineering attacks:

• Do not click web links or open attachments in unsolicited email messages.
• Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams.
• Refer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks.

No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time.

5. UPDATE HISTORY

• April 10, 2025: Initial Publication of Siemens SSA-634640

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