CVE-2018-16561
Siemens · published 2019-04-17
Source record Collected from the National Vulnerability Database (NVD)
Description
Description by Siemens AG via the CVE Program.
A vulnerability has been identified in SIMATIC S7-300 CPUs (All versions < V3.X.16). The affected CPUs improperly validate S7 communication packets which could cause a Denial-of-Service condition of the CPU. The CPU will remain in DEFECT mode until manual restart. Successful exploitation requires an attacker to be able to send a specially crafted S7 communication packet to a communication interface of the CPU. This includes Ethernet, PROFIBUS, and Multi Point Interfaces (MPI). No user interaction or privileges are required to exploit the security vulnerability. The vulnerability could allow causing a Denial-of-Service condition of the core functionality of the CPU, compromising the availability of the system. At the time of advisory publication no public exploitation of this security vulnerability was known. Siemens confirms the security vulnerability and provides mitigations to resolve the security issue.
Status at the source
- NVD status: Modified
Affected products, as the source lists them
| Vendor | Product | Versions |
|---|---|---|
| Siemens | SIMATIC S7-300 CPUs | All versions < V3.X.16: affected |
Products named in NVD's CPE match criteria (4)
cpe:2.3:o:siemens:simatic_s7-300_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:siemens:simatic_s7-300f_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:siemens:simatic_s7-300fs_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:siemens:simatic_s7-300t_firmware:-:*:*:*:*:*:*:*
DeSpy has not checked any unit, hardware revision or firmware. A product missing here is not a statement that it is unaffected.
Scores, as their sources published them
- CVSS 3.1: 7.5 HIGH — as published by CISA-ADP (Secondary)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 3.0: 7.5 HIGH — as published by NIST (Primary)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0: 7.8 HIGH — as published by NIST (Primary)
AV:N/AC:L/Au:N/C:N/I:N/A:C - SSVC — CISA's assessment (SSVC 2.0.3, CISA Coordinator): Exploitation: none · Automatable: yes · Technical impact: partial
DeSpy does not score records. These are the sources' own values.
Weaknesses
NVD-CWE-noinfo, CWE-20
Sources
References the source lists
- https://cert-portal.siemens.com/productcert/pdf/ssa-306710.pdf
- https://cert-portal.siemens.com/productcert/pdf/ssa-306710.pdf
Source dates: published 2019-04-17, last changed 2026-06-17. DeSpy's copy of this version is dated 2026-09-28.
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