CVE-2021-37172

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A vulnerability has been identified in SIMATIC S7-1200 CPU family (incl. SIPLUS variants) (V4.5.0). Affected devices fail to authenticate against configured passwords when provisioned using TIA Portal V13. This could allow an attacker using TIA Portal V13 or later versions to bypass authentication and download arbitrary programs to the PLC. The vulnerability does not occur when TIA Portal V13 SP1 or any later version was used to provision the device.

Se ha identificado una vulnerabilidad en la familia de CPUs SIMATIC S7-1200 (Incluyendo las variantes SIPLUS) (V4.5.0). Los dispositivos afectados no se autentican con las contraseñas configuradas cuando se aprovisionan con TIA Portal V13. Esto podría permitir a un atacante que utilice TIA Portal V13 o versiones posteriores eludir la autenticación y descargar programas arbitrarios en el PLC. La vulnerabilidad no se produce cuando se utiliza TIA Portal V13 SP1 o cualquier versión posterior para aprovisionar el dispositivo

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-07-21 CVE Reserved
2021-08-10 CVE Published
2024-04-25 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-287: Improper Authentication

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC
https://cert-portal.siemens.com/productcert/pdf/ssa-830194.pdf	2022-07-01

URL	Date	SRC

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 S7-1200 Cpu Firmware Search vendor "Siemens" for product "Simatic S7-1200 Cpu Firmware"	4.5.0 Search vendor "Siemens" for product "Simatic S7-1200 Cpu Firmware" and version "4.5.0"	-	Affected	in	Siemens Search vendor "Siemens"	Cpu 1211c Search vendor "Siemens" for product "Cpu 1211c"	-	-	Safe
Siemens Search vendor "Siemens"	Simatic S7-1200 Cpu Firmware Search vendor "Siemens" for product "Simatic S7-1200 Cpu Firmware"	4.5.0 Search vendor "Siemens" for product "Simatic S7-1200 Cpu Firmware" and version "4.5.0"	-	Affected	in	Siemens Search vendor "Siemens"	Cpu 1212c Search vendor "Siemens" for product "Cpu 1212c"	-	-	Safe
Siemens Search vendor "Siemens"	Simatic S7-1200 Cpu Firmware Search vendor "Siemens" for product "Simatic S7-1200 Cpu Firmware"	4.5.0 Search vendor "Siemens" for product "Simatic S7-1200 Cpu Firmware" and version "4.5.0"	-	Affected	in	Siemens Search vendor "Siemens"	Cpu 1212fc Search vendor "Siemens" for product "Cpu 1212fc"	-	-	Safe
Siemens Search vendor "Siemens"	Simatic S7-1200 Cpu Firmware Search vendor "Siemens" for product "Simatic S7-1200 Cpu Firmware"	4.5.0 Search vendor "Siemens" for product "Simatic S7-1200 Cpu Firmware" and version "4.5.0"	-	Affected	in	Siemens Search vendor "Siemens"	Cpu 1214c Search vendor "Siemens" for product "Cpu 1214c"	-	-	Safe
Siemens Search vendor "Siemens"	Simatic S7-1200 Cpu Firmware Search vendor "Siemens" for product "Simatic S7-1200 Cpu Firmware"	4.5.0 Search vendor "Siemens" for product "Simatic S7-1200 Cpu Firmware" and version "4.5.0"	-	Affected	in	Siemens Search vendor "Siemens"	Cpu 1214fc Search vendor "Siemens" for product "Cpu 1214fc"	-	-	Safe
Siemens Search vendor "Siemens"	Simatic S7-1200 Cpu Firmware Search vendor "Siemens" for product "Simatic S7-1200 Cpu Firmware"	4.5.0 Search vendor "Siemens" for product "Simatic S7-1200 Cpu Firmware" and version "4.5.0"	-	Affected	in	Siemens Search vendor "Siemens"	Cpu 1215c Search vendor "Siemens" for product "Cpu 1215c"	-	-	Safe
Siemens Search vendor "Siemens"	Simatic S7-1200 Cpu Firmware Search vendor "Siemens" for product "Simatic S7-1200 Cpu Firmware"	4.5.0 Search vendor "Siemens" for product "Simatic S7-1200 Cpu Firmware" and version "4.5.0"	-	Affected	in	Siemens Search vendor "Siemens"	Cpu 1215fc Search vendor "Siemens" for product "Cpu 1215fc"	-	-	Safe
Siemens Search vendor "Siemens"	Simatic S7-1200 Cpu Firmware Search vendor "Siemens" for product "Simatic S7-1200 Cpu Firmware"	4.5.0 Search vendor "Siemens" for product "Simatic S7-1200 Cpu Firmware" and version "4.5.0"	-	Affected	in	Siemens Search vendor "Siemens"	Cpu 1217c Search vendor "Siemens" for product "Cpu 1217c"	-	-	Safe
Siemens Search vendor "Siemens"		Simatic Step 7 \(tia Portal\) Search vendor "Siemens" for product "Simatic Step 7 \(tia Portal\)"				<= 13.0 Search vendor "Siemens" for product "Simatic Step 7 \(tia Portal\)" and version " <= 13.0"		-		Affected