CVE-2018-4850

Severity Score

7.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Se ha identificado una vulnerabilidad en SIMATIC S7-400 (incl. F) CPU en versiones de hardware 4.0 y anteriores (todas las versiones), SIMATIC S7-400 (incl. F) CPU en versiones de hardware 5.0 (todas las versiones anteriores a la V5.2), SIMATIC S7-400H CPU en versiones de hardware 4.5 y anteriores (todas las versiones). Las CPU afectadas validan incorrectamente los paquetes de comunicación S7 que podrían provocar una condición de denegación de servicio (DoS) en la CPU. La CPU continuará en modo DEFECT hasta que se reinicie manualmente.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2018-01-02 CVE Reserved
2018-05-16 CVE Published
2024-01-03 EPSS Updated
2024-09-16 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-20: Improper Input Validation

CAPEC

References (3)

URL	Tag	Source
http://www.securityfocus.com/bid/104217	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://cert-portal.siemens.com/productcert/pdf/ssa-914382.pdf	2019-10-09
https://www.siemens.com/global/en/home/products/services/cert.html#SecurityPublications	2019-10-09

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Siemens Search vendor "Siemens"	Simatic S7-400 Firmware Search vendor "Siemens" for product "Simatic S7-400 Firmware"	<= 4.0 Search vendor "Siemens" for product "Simatic S7-400 Firmware" and version " <= 4.0"	-	Affected	in	Siemens Search vendor "Siemens"	Simatic S7-400 Search vendor "Siemens" for product "Simatic S7-400"	-	-	Safe
Siemens Search vendor "Siemens"	Simatic S7-400 Firmware Search vendor "Siemens" for product "Simatic S7-400 Firmware"	< 5.2 Search vendor "Siemens" for product "Simatic S7-400 Firmware" and version " < 5.2"	-	Affected	in	Siemens Search vendor "Siemens"	Simatic S7-400 Search vendor "Siemens" for product "Simatic S7-400"	-	-	Safe
Siemens Search vendor "Siemens"	Simatic S7-400h Firmware Search vendor "Siemens" for product "Simatic S7-400h Firmware"	<= 4.5 Search vendor "Siemens" for product "Simatic S7-400h Firmware" and version " <= 4.5"	-	Affected	in	Siemens Search vendor "Siemens"	Simatic S7-400h Search vendor "Siemens" for product "Simatic S7-400h"	-	-	Safe