ICSA-20-315-04: Siemens SIMATIC S7-300 CPUs and SINUMERIK Controller (Update A)
CISA advisory · released 2020-11-10
Source record Collected from CISA's CSAF advisory feed
- Distribution label in the document: TLP:WHITE
- Revision 3, 2022-08-09 (final)
CISA's summary
Summary: A vulnerability in S7-300 might allow an attacker to cause a Denial- of-Service condition on port 102 of the affected devices by sending specially crafted packets. Siemens recommends specific countermeasures for products where updates are not, or not yet available.
Products, as the advisory lists them
| Vendor | Product | Version |
|---|---|---|
| Siemens | SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants) | vers:all/* |
| Siemens | SIMATIC TDC CPU555 | vers:all/* |
| Siemens | SINUMERIK 840D sl | vers:all/* |
DeSpy has not checked any unit, hardware revision or firmware.
Vulnerabilities in this advisory
- CVE-2020-15783 — CVE-2020-15783 · CWE-400
Sending multiple specially crafted packets to the affected devices could cause a Denial-of-Service on port 102. A cold restart is required to recover the service.
Acknowledgments, as the advisory lists them
- Siemens ProductCERT: reporting this vulnerability to CISA.
- WangFangLi, Beijing Winicssec Technology CO., Ltd: 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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