CVE-2018-4850: Input Validation
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.
Affected Software
Event History
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.