ICSA-22-286-04: Siemens SIMATIC S7-1200 and S7-1500 CPU Families
CISA advisory · released 2022-10-11
Source record Collected from CISA's CSAF advisory feed
- Distribution label in the document: TLP:WHITE
- Revision 1, 2022-10-11 (final)
CISA's summary
Summary: SIMATIC S7-1200, S7-1500 CPUs and related products protect the built-in global private key in a way that cannot be considered sufficient any longer. The key is used for the legacy protection of confidential configuration data and the legacy PG/PC and HMI communication. This could allow attackers to discover the private key of a CPU product family by an offline attack against a single CPU of the family. Attackers could then use this knowledge to extract confidential configuration data from projects that are protected by that key or to perform attacks against legacy PG/PC and HMI communication. Siemens recommends to update both the affected products as well as the corresponding TIA Portal project to the latest versions. TIA Portal V17 and related CPU firmware versions introduced protection of confidential configuration data based on individual passwords per device and TLS-protected PG/PC and HMI communication. Additional details can be found in the related Siemens security bulletin SSB-898115 ( https://cert-portal.siemens.com/productcert/html/ssb-898115.html).
Products, as the advisory lists them
| Vendor | Product | Version |
|---|---|---|
| Siemens | SIMATIC Drive Controller family | <V2.9.2 |
| Siemens | SIMATIC ET 200SP Open Controller CPU 1515SP PC (incl. SIPLUS variants) | vers:all/* |
| Siemens | SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) | <V21.9 |
| Siemens | SIMATIC S7-1200 CPU family (incl. SIPLUS variants) | <V4.5.0 |
| Siemens | SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants) | <V2.9.2 |
| Siemens | SIMATIC S7-1500 Software Controller | <V21.9 |
| Siemens | SIMATIC S7-PLCSIM Advanced | <V4.0 |
DeSpy has not checked any unit, hardware revision or firmware.
Vulnerabilities in this advisory
- CVE-2022-38465 — CVE-2022-38465 · CWE-522
Affected products protect the built-in global private key in a way that cannot be considered sufficient any longer. The key is used for the legacy protection of confidential configuration data and the legacy PG/PC and HMI communication. This could allow attackers to discover the private key of a CPU product family by an offline attack against a single CPU of the family. Attackers could then use this knowledge to extract confidential configuration data from projects that are protected by that key or to perform attacks against legacy PG/PC and HMI communication.
Acknowledgments, as the advisory lists them
- Siemens ProductCERT: reporting this vulnerability to CISA.
- Tal Keren, Claroty: coordinating disclosure
The advisory's legal notice
Siemens Security Advisories are subject to the terms and conditions contained in Siemens' underlying license terms or other applicable agreements previously agreed to with Siemens (hereinafter "License Terms"). To the extent applicable to information, software or documentation made available in or through a Siemens Security Advisory, the Terms of Use of Siemens' Global Website (https://www.siemens.com/terms_of_use, hereinafter "Terms of Use"), in particular Sections 8-10 of the Terms of Use, shall apply additionally. In case of conflicts, the License Terms shall prevail over the Terms of Use.
Sources
DeSpy's copy of this version is dated 2026-09-28.
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