CVE-2021-33737

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 CP 343-1 (incl. SIPLUS variants) (All versions), SIMATIC CP 343-1 Advanced (incl. SIPLUS variants) (All versions), SIMATIC CP 343-1 ERPC (All versions), SIMATIC CP 343-1 Lean (incl. SIPLUS variants) (All versions), SIMATIC CP 443-1 (All versions < V3.3), SIMATIC CP 443-1 (All versions < V3.3), SIMATIC CP 443-1 Advanced (All versions < V3.3), SIPLUS NET CP 443-1 (All versions < V3.3), SIPLUS NET CP 443-1 Advanced (All versions < V3.3). Sending a specially crafted packet to port 102/tcp of an affected device could cause a denial of service condition. A restart is needed to restore normal operations.

Se ha identificado una vulnerabilidad en SIMATIC CP 343-1 (incl. variantes SIPLUS) (Todas las versiones), SIMATIC CP 343-1 Advanced (incl. variantes SIPLUS) (Todas las versiones), SIMATIC CP 343-1 ERPC (Todas las versiones), SIMATIC CP 343-1 Lean (incl. variantes SIPLUS) SIPLUS) (Todas las versiones), SIMATIC CP 443-1 (incl. variantes SIPLUS) (Todas las versiones), SIMATIC CP 443-1 Advanced (Todas las versiones), SIMATIC CP 443-1 Advanced (incl. variantes SIPLUS) (Todas las versiones), SIPLUS NET CP 443-1 Advanced (Todas las versiones). El envío de un paquete especialmente diseñado al puerto 102/tcp de un dispositivo afectado podría causar una condición de denegación de servicio. Se necesita un reinicio para restaurar las operaciones normales

*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

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-05-28 CVE Reserved
2021-09-14 CVE Published
2024-05-30 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC
https://cert-portal.siemens.com/productcert/pdf/ssa-549234.pdf	2023-04-11

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 Cp 343-1 Firmware Search vendor "Siemens" for product "Simatic Cp 343-1 Firmware"	*	-	Affected	in	Siemens Search vendor "Siemens"	Simatic Cp343-1 Search vendor "Siemens" for product "Simatic Cp343-1"	-	-	Safe
Siemens Search vendor "Siemens"	Simatic Cp 343-1 Advanced Firmware Search vendor "Siemens" for product "Simatic Cp 343-1 Advanced Firmware"	*	-	Affected	in	Siemens Search vendor "Siemens"	Simatic Cp343-1 Advanced Search vendor "Siemens" for product "Simatic Cp343-1 Advanced"	-	-	Safe
Siemens Search vendor "Siemens"	Simatic Cp 343-1 Erpc Firmware Search vendor "Siemens" for product "Simatic Cp 343-1 Erpc Firmware"	*	-	Affected	in	Siemens Search vendor "Siemens"	Simatic Cp 343-1 Erpc Search vendor "Siemens" for product "Simatic Cp 343-1 Erpc"	*	-	Safe
Siemens Search vendor "Siemens"	Simatic Cp 343-1 Lean Firmware Search vendor "Siemens" for product "Simatic Cp 343-1 Lean Firmware"	*	-	Affected	in	Siemens Search vendor "Siemens"	Simatic Cp 343-1 Lean Search vendor "Siemens" for product "Simatic Cp 343-1 Lean"	*	-	Safe
Siemens Search vendor "Siemens"	Simatic Cp 443-1 Firmware Search vendor "Siemens" for product "Simatic Cp 443-1 Firmware"	*	-	Affected	in	Siemens Search vendor "Siemens"	Simatic Cp 443-1 Search vendor "Siemens" for product "Simatic Cp 443-1"	*	-	Safe
Siemens Search vendor "Siemens"	Simatic Cp 443-1 Advanced Firmware Search vendor "Siemens" for product "Simatic Cp 443-1 Advanced Firmware"	*	-	Affected	in	Siemens Search vendor "Siemens"	Simatic Cp 443-1 Advanced Search vendor "Siemens" for product "Simatic Cp 443-1 Advanced"	*	-	Safe