CVE-2018-4850: Input Validation
First published: Wed May 16 2018(Updated: )
A vulnerability has been identified in SIMATIC S7-400 (incl. F) CPU hardware version 4.0 and below (All versions), SIMATIC S7-400 (incl. F) CPU hardware version 5.0 (All firmware versions < V5.2), SIMATIC S7-400H CPU hardware version 4.5 and below (All versions). 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.
Credit: productcert@siemens.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Siemens Simatic S7-400 Firmware | <=4.0 | |
| Siemens Simatic S7-400 | ||
| Siemens Simatic S7-400 Firmware | <5.2 | |
| Siemens Simatic S7-400h Firmware | <=4.5 | |
| Siemens Simatic S7-400h |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2018-4850?
The severity of CVE-2018-4850 is high, with a severity value of 7.5.
Which products are affected by CVE-2018-4850?
SIMATIC S7-400 (incl. F) CPU hardware versions 4.0 and below, SIMATIC S7-400 (incl. F) CPU hardware version 5.0 (All firmware versions < V5.2), and SIMATIC S7-400H CPU hardware versions 4.5 and below are affected by CVE-2018-4850.
How does CVE-2018-4850 impact Siemens SIMATIC S7-400 firmware?
CVE-2018-4850 impacts Siemens SIMATIC S7-400 firmware versions 4.0 and below, as well as firmware versions 5.0 with a firmware version lower than V5.2.
Is Siemens Simatic S7-400h vulnerable to CVE-2018-4850?
No, Siemens Simatic S7-400h is not vulnerable to CVE-2018-4850.
What is the Common Weakness Enumeration (CWE) for CVE-2018-4850?
The Common Weakness Enumeration (CWE) for CVE-2018-4850 is CWE-20.
- collector/nvd-index
- agent/severity
- agent/references
- agent/weakness
- agent/author
- agent/tags
- agent/type
- agent/event
- agent/description
- agent/last-modified-date
- agent/softwarecombine
- agent/first-publish-date
- collector/mitre-cve
- source/MITRE
- vendor/siemens
- canonical/siemens simatic s7-400 firmware
- version/siemens simatic s7-400 firmware/4.0
- canonical/siemens simatic s7-400
- canonical/siemens simatic s7-400h firmware
- version/siemens simatic s7-400h firmware/4.5
- canonical/siemens simatic s7-400h