Siemens SCALANCE and RUGGEDCOM  – 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 5.3
• ATTENTION: Exploitable remotely/low attack complexity
• Vendor: Siemens
• Equipment: SCALANCE and RUGGEDCOM
• Vulnerability: Improper Privilege Management

2. RISK EVALUATION

Successful exploitation of this vulnerability could allow an attacker to perform actions that exceed the permissions of the “guest” role.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

Siemens reports that the following products are affected:

• Siemens RUGGEDCOM RST2428P (6GK6242-6PA00): All versions prior to V3.1
• Siemens SCALANCE XCM324 (6GK5324-8TS01-2AC2): All versions prior to V3.1
• Siemens SCALANCE XCM328 (6GK5328-4TS01-2AC2): All versions prior to V3.1
• Siemens SCALANCE XCM332 (6GK5332-0GA01-2AC2): All versions prior to V3.1
• Siemens SCALANCE XR302-32 (6GK5334-5TS00-2AR3): All versions prior to V3.1
• Siemens SCALANCE XR302-32 (6GK5334-5TS00-3AR3): All versions prior to V3.1
• Siemens SCALANCE XR302-32 (6GK5334-5TS00-4AR3): All versions prior to V3.1
• Siemens SCALANCE XR322-12 (6GK5334-3TS00-2AR3): All versions prior to V3.1
• Siemens SCALANCE XR322-12 (6GK5334-3TS00-3AR3): All versions prior to V3.1
• Siemens SCALANCE XR322-12 (6GK5334-3TS00-4AR3): All versions prior to V3.1
• Siemens SCALANCE XR326-8 (6GK5334-2TS00-2AR3): All versions prior to V3.1
• Siemens SCALANCE XC316-8 (6GK5324-8TS00-2AC2): All versions prior to V3.1
• Siemens SCALANCE XR326-8 (6GK5334-2TS00-3AR3): All versions prior to V3.1
• Siemens SCALANCE XR326-8 (6GK5334-2TS00-4AR3): All versions prior to V3.1
• Siemens SCALANCE XR326-8 EEC (6GK5334-2TS00-2ER3): All versions prior to V3.1
• Siemens SCALANCE XR502-32 (6GK5534-5TR00-2AR3): All versions prior to V3.1
• Siemens SCALANCE XR502-32 (6GK5534-5TR00-3AR3): All versions prior to V3.1
• Siemens SCALANCE XR502-32 (6GK5534-5TR00-4AR3): All versions prior to V3.1
• Siemens SCALANCE XR522-12 (6GK5534-3TR00-2AR3): All versions prior to V3.1
• Siemens SCALANCE XR522-12 (6GK5534-3TR00-3AR3): All versions prior to V3.1
• Siemens SCALANCE XR522-12 (6GK5534-3TR00-4AR3): All versions prior to V3.1
• Siemens SCALANCE XR526-8 (6GK5534-2TR00-2AR3): All versions prior to V3.1
• Siemens SCALANCE XC324-4 (6GK5328-4TS00-2AC2): All versions prior to V3.1
• Siemens SCALANCE XR526-8 (6GK5534-2TR00-3AR3): All versions prior to V3.1
• Siemens SCALANCE XR526-8 (6GK5534-2TR00-4AR3): All versions prior to V3.1
• Siemens SCALANCE XRH334 (24 V DC, 8xFO, CC) (6GK5334-2TS01-2ER3): All versions prior to V3.1
• Siemens SCALANCE XRM334 (2×230 V AC, 8xFO) (6GK5334-2TS01-4AR3): All versions prior to V3.1
• Siemens SCALANCE XRM334 (2×230 V AC, 12xFO) (6GK5334-3TS01-4AR3): All versions prior to V3.1
• Siemens SCALANCE XRM334 (2x230V AC, 2x10G, 24xSFP, 8xSFP+) (6GK5334-5TS01-4AR3): All versions prior to V3.1
• Siemens SCALANCE XRM334 (24 V DC, 8xFO) (6GK5334-2TS01-2AR3): All versions prior to V3.1
• Siemens SCALANCE XRM334 (24 V DC, 12xFO) (6GK5334-3TS01-2AR3): All versions prior to V3.1
• Siemens SCALANCE XRM334 (24V DC, 2x10G, 24xSFP, 8xSFP+) (6GK5334-5TS01-2AR3): All versions prior to V3.1
• Siemens SCALANCE XRM334 (230 V AC, 8xFO) (6GK5334-2TS01-3AR3): All versions prior to V3.1
• Siemens SCALANCE XC324-4 EEC (6GK5328-4TS00-2EC2): All versions prior to V3.1
• Siemens SCALANCE XRM334 (230 V AC, 12xFO) (6GK5334-3TS01-3AR3): All versions prior to V3.1
• Siemens SCALANCE XRM334 (230V AC, 2x10G, 24xSFP, 8xSFP+) (6GK5334-5TS01-3AR3): All versions prior to V3.1
• Siemens SCALANCE XC332 (6GK5332-0GA00-2AC2): All versions prior to V3.1
• Siemens SCALANCE XC416-8 (6GK5424-8TR00-2AC2): All versions prior to V3.1
• Siemens SCALANCE XC424-4 (6GK5428-4TR00-2AC2): All versions prior to V3.1
• Siemens SCALANCE XC432 (6GK5432-0GR00-2AC2): All versions prior to V3.1
• Siemens SCALANCE XCH328 (6GK5328-4TS01-2EC2): All versions prior to V3.1

3.2 VULNERABILITY OVERVIEW

3.2.1 IMPROPER PRIVILEGE MANAGEMENT CWE-269

Affected devices contain an incorrect authorization check vulnerability. This could allow an authenticated remote attacker with “guest” role to invoke an internal “do system” command exceeding their privileges. This command allows the execution of certain low-risk actions, the most critical of which is clearing the local system log.

CVE-2024-41797 has been assigned to this vulnerability. A CVSS v3.1 base score of 4.3 has been calculated; the CVSS vector string is (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N).

A CVSS v4 score has also been calculated for CVE-2024-41797. A base score of 5.3 has been calculated; the CVSS vector string is (CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/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:

• RUGGEDCOM RST2428P (6GK6242-6PA00), SCALANCE XC316-8 (6GK5324-8TS00-2AC2), SCALANCE XC324-4 (6GK5328-4TS00-2AC2), SCALANCE XC324-4 EEC (6GK5328-4TS00-2EC2), SCALANCE XC332 (6GK5332-0GA00-2AC2), SCALANCE XC416-8 (6GK5424-8TR00-2AC2), SCALANCE XC424-4 (6GK5428-4TR00-2AC2), SCALANCE XC432 (6GK5432-0GR00-2AC2), SCALANCE XCH328 (6GK5328-4TS01-2EC2), SCALANCE XCM324 (6GK5324-8TS01-2AC2), SCALANCE XCM328 (6GK5328-4TS01-2AC2), SCALANCE XR302-32 (6GK5334-5TS00-2AR3), SCALANCE XR302-32 (6GK5334-5TS00-3AR3), SCALANCE XR302-32 (6GK5334-5TS00-4AR3), SCALANCE XR322-12 (6GK5334-3TS00-2AR3), SCALANCE XR322-12 (6GK5334-3TS00-3AR3), SCALANCE XR322-12 (6GK5334-3TS00-4AR3), SCALANCE XR326-8 (6GK5334-2TS00-2AR3), SCALANCE XR326-8 (6GK5334-2TS00-3AR3), SCALANCE XR326-8 (6GK5334-2TS00-4AR3), SCALANCE XR326-8 EEC (6GK5334-2TS00-2ER3), SCALANCE XR502-32 (6GK5534-5TR00-2AR3), SCALANCE XR502-32 (6GK5534-5TR00-3AR3), SCALANCE XR502-32 (6GK5534-5TR00-4AR3), SCALANCE XR522-12 (6GK5534-3TR00-2AR3), SCALANCE XR522-12 (6GK5534-3TR00-3AR3), SCALANCE XR522-12 (6GK5534-3TR00-4AR3), SCALANCE XR526-8 (6GK5534-2TR00-2AR3), SCALANCE XR526-8 (6GK5534-2TR00-3AR3), SCALANCE XR526-8 (6GK5534-2TR00-4AR3), SCALANCE XRH334 (24 V DC, 8xFO, CC) (6GK5334-2TS01-2ER3), SCALANCE XRM334 (2×230 V AC, 8xFO) (6GK5334-2TS01-4AR3), SCALANCE XRM334 (2×230 V AC, 12xFO) (6GK5334-3TS01-4AR3), SCALANCE XRM334 (2x230V AC, 2x10G, 24xSFP, 8xSFP+) (6GK5334-5TS01-4AR3), SCALANCE XRM334 (24 V DC, 8xFO) (6GK5334-2TS01-2AR3), SCALANCE XRM334 (24 V DC, 12xFO) (6GK5334-3TS01-2AR3), SCALANCE XRM334 (24V DC, 2x10G, 24xSFP, 8xSFP+) (6GK5334-5TS01-2AR3), SCALANCE XRM334 (230 V AC, 8xFO) (6GK5334-2TS01-3AR3), SCALANCE XRM334 (230 V AC, 12xFO) (6GK5334-3TS01-3AR3), SCALANCE XRM334 (230V AC, 2x10G, 24xSFP, 8xSFP+) (6GK5334-5TS01-3AR3): Update to V3.1 or later version
• SCALANCE XCM332 (6GK5332-0GA01-2AC2): Update to V3.1 or later version

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-633269 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

• June 12, 2025: Initial Publication

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Read More – All CISA Advisories