CVE-2018-4850
High
Description
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductSiemens Simatic S7-400 Firmware
PublishedMay 16, 2018
First seenMay 16, 2018
Weakness typeCWE-20Improper input validation
How to fix
Update
- siemens simatic_s7-400_firmware5.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| siemens simatic_s7-400_firmware | v ≤ 4.0, v < 5.2 | 5.2 |
| siemens simatic_s7-400h_firmware | v ≤ 4.5 | — |
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