ICSA-19-318-01: Siemens Mentor Nucleus Networking Module
CISA advisory · released 2019-11-12
Source record Collected from CISA's CSAF advisory feed
- Distribution label in the document: TLP:WHITE
- Revision 3, 2025-03-11 (final)
CISA's summary
Summary: The DHCP implementation of the networking component (Nucleus NET) in Nucleus Real-Time Operating System (RTOS) contains a vulnerability that could allow an attacker to change the IP address of an affected device to an invalid value. Siemens has released new versions for several affected products and recommends to update to the latest versions. Siemens is preparing further fix versions and recommends specific countermeasures for products where fixes are not, or not yet available.
Products, as the advisory lists them
| Vendor | Product | Version |
|---|---|---|
| Siemens | Capital Embedded AR Classic 431-422 | vers:all/* |
| Siemens | Capital Embedded AR Classic R20-11 | vers:all/<V2303 |
| Siemens | Nucleus NET | vers:all/* |
| Siemens | Nucleus ReadyStart V3 | vers:all/<V2017.02.3 |
| Siemens | Nucleus Source Code | vers:all/* |
DeSpy has not checked any unit, hardware revision or firmware.
Vulnerabilities in this advisory
- CVE-2019-13939 — CVE-2019-13939 · CWE-20
By sending specially crafted DHCP packets to a device where the DHCP client is enabled, an attacker could change the IP address of the device to an invalid value.
Acknowledgments, as the advisory lists them
- Armis: reporting this vulnerability to Siemens.
The advisory's legal notice
The use of Siemens Security Advisories is subject to the terms and conditions listed on: https://www.siemens.com/productcert/terms-of-use.
Sources
DeSpy's copy of this version is dated 2026-09-28.
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