Siemens SIPROTEC 5 Products  – 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 7.1
• ATTENTION: Exploitable remotely/low attack complexity
• Vendor: Siemens
• Equipment: SIPROTEC 5
• Vulnerability: Files or Directories Accessible to External Parties

2. RISK EVALUATION

Successful exploitation of this vulnerability could allow an authenticated remote attacker to read arbitrary files or the entire filesystem of the device.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

Siemens reports that the following products are affected:

• Siemens SIPROTEC 5 6MD84 (CP300): Versions prior to 9.80
• Siemens SIPROTEC 5 7SA87 (CP300): Versions 7.80 up to but not including 9.80
• Siemens SIPROTEC 5 7SD82 (CP100): Versions 7.80 and after
• Siemens SIPROTEC 5 7SD82 (CP150): Versions prior to 9.80
• Siemens SIPROTEC 5 7SD86 (CP300): Versions 7.80 up to but not including 9.80
• Siemens SIPROTEC 5 7SD87 (CP300): Versions 7.80 up to but not including 9.80
• Siemens SIPROTEC 5 7SJ81 (CP100): Versions 7.80 and after
• Siemens SIPROTEC 5 7SJ81 (CP150): Versions prior to 9.80
• Siemens SIPROTEC 5 7SJ82 (CP100): Versions 7.80 and after
• Siemens SIPROTEC 5 7SJ82 (CP150): Versions prior to 9.80
• Siemens SIPROTEC 5 7SJ85 (CP300): Versions 7.80 up to but not including 9.80
• Siemens SIPROTEC 5 6MD85 (CP300): Versions 7.80 up to but not including 9.80
• Siemens SIPROTEC 5 7SJ86 (CP300): Versions 7.80 up to but not including 9.80
• Siemens SIPROTEC 5 7SK82 (CP100): Versions 7.80 and after
• Siemens SIPROTEC 5 7SK82 (CP150): Versions prior to 9.80
• Siemens SIPROTEC 5 7SK85 (CP300): Versions 7.80 up to but not including 9.80
• Siemens SIPROTEC 5 7SL82 (CP100): Versions 7.80 and after
• Siemens SIPROTEC 5 7SL82 (CP150): Versions prior to 9.80
• Siemens SIPROTEC 5 7SL86 (CP300): Versions 7.80 up to but not including 9.80
• Siemens SIPROTEC 5 7SL87 (CP300): Versions 7.80 up to but not including 9.80
• Siemens SIPROTEC 5 7SS85 (CP300): Versions 7.80 up to but not including 9.80
• Siemens SIPROTEC 5 7ST85 (CP300): All versions
• Siemens SIPROTEC 5 6MD86 (CP300): Versions 7.80 up to but not including 9.80
• Siemens SIPROTEC 5 7ST86 (CP300): Versions prior to 9.80
• Siemens SIPROTEC 5 7SX82 (CP150): Versions prior to 9.80
• Siemens SIPROTEC 5 7SX85 (CP300): Versions prior to 9.80
• Siemens SIPROTEC 5 7SY82 (CP150): Versions prior to 9.80
• Siemens SIPROTEC 5 7UM85 (CP300): Versions 7.80 up to but not including 9.80
• Siemens SIPROTEC 5 7UT82 (CP100): Versions 7.80 and after
• Siemens SIPROTEC 5 7UT82 (CP150): Versions prior to V9.80
• Siemens SIPROTEC 5 7UT85 (CP300): Versions 7.80 up to but not including 9.80
• Siemens SIPROTEC 5 7UT86 (CP300): Versions 7.80 up to but not including 9.80
• Siemens SIPROTEC 5 7UT87 (CP300): Versions 7.80 up to but not including 9.80
• Siemens SIPROTEC 5 6MD89 (CP300): Versions 7.80 and after
• Siemens SIPROTEC 5 7VE85 (CP300): Versions 7.80 up to but not including 9.80
• Siemens SIPROTEC 5 7VK87 (CP300): Versions 7.80 up to but not including 9.80
• Siemens SIPROTEC 5 7VU85 (CP300): Versions prior to 9.80
• Siemens SIPROTEC 5 Compact 7SX800 (CP050): Versions prior to V9.80
• Siemens SIPROTEC 5 6MU85 (CP300): Versions 7.80 up to but not including 9.80
• Siemens SIPROTEC 5 7KE85 (CP300): Versions 7.80 up to but not including 9.80
• Siemens SIPROTEC 5 7SA82 (CP100): Versions 7.80 and after
• Siemens SIPROTEC 5 7SA82 (CP150): Versions prior to 9.80
• Siemens SIPROTEC 5 7SA86 (CP300): Versions 7.80 up to but not including 9.80

3.2 VULNERABILITY OVERVIEW

3.2.1 FILES OR DIRECTORIES ACCESSIBLE TO EXTERNAL PARTIES CWE-552

Affected devices do not properly limit the path accessible via their webserver. This could allow an authenticated remote attacker to read arbitrary files from the filesystem of affected devices.

CVE-2024-53649 has been assigned to this vulnerability. A CVSS v3 base score of 6.5 has been assigned; the CVSS vector string is (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N).

A CVSS v4 score has also been calculated for CVE-2024-53649. A base score of 7.1 has been calculated; the CVSS vector string is (AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/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 ProductCERT reported this vulnerability to CISA.

4. MITIGATIONS

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

• SIPROTEC 5 6MD89 (CP300), SIPROTEC 5 7SA82 (CP100), SIPROTEC 5 7SD82 (CP100), SIPROTEC 5 7SJ81 (CP100), SIPROTEC 5 7SJ82 (CP100), SIPROTEC 5 7SK82 (CP100), SIPROTEC 5 7SL82 (CP100), SIPROTEC 5 7ST85 (CP300), SIPROTEC 5 7UT82 (CP100): Currently no fix is available
• SIPROTEC 5 Compact 7SX800 (CP050): Update to V9.80 or later version
• SIPROTEC 5 6MD84 (CP300): Update to V9.80 or later version
• SIPROTEC 5 7SA82 (CP150), SIPROTEC 5 7SD82 (CP150), SIPROTEC 5 7SL82 (CP150), SIPROTEC 5 7SA86 (CP300), SIPROTEC 5 7SA87 (CP300), SIPROTEC 5 7SD86 (CP300), SIPROTEC 5 7SD87 (CP300), SIPROTEC 5 7SJ86 (CP300), SIPROTEC 5 7SL86 (CP300), SIPROTEC 5 7SL87 (CP300) and SIPROTEC 5 7VK87 (CP300): Update to V9.80 or later version
• SIPROTEC 5 7SJ81 (CP150), SIPROTEC 5 7SJ82 (CP150), and SIPROTEC 5 7SJ85 (CP300): Update to V9.80 or later version
• SIPROTEC 5 7SK82 (CP150) and SIPROTEC 5 7SK85 (CP300): Update to V9.80 or later version
• SIPROTEC 5 7ST86 (CP300): Update to V9.80 or later version
• SIPROTEC 5 7SX82 (CP150) and SIPROTEC 5 7SX85 (CP300): Update to V9.80 or later version
• SIPROTEC 5 7SY82 (CP150): Update to V9.80 or later version
• SIPROTEC 5 7UT82 (CP150), SIPROTEC 5 7UT85 (CP300), SIPROTEC 5 7UT86 (CP300), and SIPROTEC 5 7UT87 (CP300): Update to V9.80 or later version
• SIPROTEC 5 7VU85 (CP300): Update to V9.80 or later version
• SIPROTEC 5 6MD85 (CP300) and SIPROTEC 5 6MD86 (CP300): Update to V9.80 or later version
• : Update to V9.80 or later version
• SIPROTEC 5 6MU85 (CP300): Update to V9.80 or later version
• SIPROTEC 5 7KE85 (CP300): Update to V9.80 or later version
• SIPROTEC 5 7SS85 (CP300): Update to V9.80 or later version
• SIPROTEC 5 7UM85 (CP300): Update to V9.80 or later version
• SIPROTEC 5 7VE85 (CP300): Update to V9.80 or later version

Siemens recommends operators of critical power systems (e.g. TSOs or DSOs) worldwide are usually required by regulations to build resilience into the power grids by applying multi-level redundant secondary protection schemes. It is therefore recommended that the operators check whether appropriate resilient protection measures are in place. The risk of cyber incidents impacting the grid’s reliability can thus be minimized by virtue of the grid design. Siemens strongly recommends applying the provided security updates using the corresponding tooling and documented procedures made available with the product. If supported by the product, an automated means to apply the security updates across multiple product instances may be used. Siemens strongly recommends prior validation of any security update before being applied, and supervision by trained staff of the update process in the target environment. As a general security measure Siemens strongly recommends to protect network access with appropriate mechanisms (e.g. firewalls, segmentation, VPN). It is advised to configure the environment according to our operational guidelines in order to run the devices in a protected IT environment.

Recommended security guidelines can be found here.

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-194557 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.

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

5. UPDATE HISTORY

• January 16, 2025: Initial Publication

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