CVE-2020-28393

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

An unauthenticated remote attacker could create a permanent denial-of-service condition by sending specially crafted OSPF packets. Successful exploitation requires OSPF to be enabled on an affected device on the SCALANCE XM-400, XR-500 (All versions prior to v6.4).

Se ha identificado una vulnerabilidad en SCALANCE XM-400 Family (todas las versiones anteriores a V6.4), SCALANCE XR-500 Family (todas las versiones anteriores a V6.4). La implementación del protocolo OSPF en los dispositivos afectados maneja incorrectamente el número de campos LSA en combinación con otros campos modificados. Un atacante remoto no autenticado podría crear una condición de Denegación de Servicio permanente al enviar paquetes OSPF especialmente diseñados. Una explotación con éxito requiere que OSPF esté habilitado en un dispositivo afectado

*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

Medium

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-11-10 CVE Reserved
2021-05-12 CVE Published
2024-01-26 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-682: Incorrect Calculation

CAPEC

References (2)

URL	Tag	Source
https://us-cert.cisa.gov/ics/advisories/icsa-21-131-10	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://cert-portal.siemens.com/productcert/pdf/ssa-116379.pdf	2021-05-21

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Siemens Search vendor "Siemens"	Scalance Xm-400 Firmware Search vendor "Siemens" for product "Scalance Xm-400 Firmware"	< 6.4 Search vendor "Siemens" for product "Scalance Xm-400 Firmware" and version " < 6.4"	-	Affected	in	Siemens Search vendor "Siemens"	Scalance Xm-400 Search vendor "Siemens" for product "Scalance Xm-400"	-	-	Safe
Siemens Search vendor "Siemens"	Scalance Xr524 Firmware Search vendor "Siemens" for product "Scalance Xr524 Firmware"	< 6.4 Search vendor "Siemens" for product "Scalance Xr524 Firmware" and version " < 6.4"	-	Affected	in	Siemens Search vendor "Siemens"	Scalance Xr524 Search vendor "Siemens" for product "Scalance Xr524"	-	-	Safe
Siemens Search vendor "Siemens"	Scalance Xr526 Firmware Search vendor "Siemens" for product "Scalance Xr526 Firmware"	< 6.4 Search vendor "Siemens" for product "Scalance Xr526 Firmware" and version " < 6.4"	-	Affected	in	Siemens Search vendor "Siemens"	Scalance Xr526 Search vendor "Siemens" for product "Scalance Xr526"	-	-	Safe
Siemens Search vendor "Siemens"	Scalance Xr528 Firmware Search vendor "Siemens" for product "Scalance Xr528 Firmware"	< 6.4 Search vendor "Siemens" for product "Scalance Xr528 Firmware" and version " < 6.4"	-	Affected	in	Siemens Search vendor "Siemens"	Scalance Xr528 Search vendor "Siemens" for product "Scalance Xr528"	-	-	Safe
Siemens Search vendor "Siemens"	Scalance Xr552 Firmware Search vendor "Siemens" for product "Scalance Xr552 Firmware"	< 6.4 Search vendor "Siemens" for product "Scalance Xr552 Firmware" and version " < 6.4"	-	Affected	in	Siemens Search vendor "Siemens"	Scalance Xr552 Search vendor "Siemens" for product "Scalance Xr552"	-	-	Safe
Siemens Search vendor "Siemens"	Scalance Xm416-4c Firmware Search vendor "Siemens" for product "Scalance Xm416-4c Firmware"	< 6.4 Search vendor "Siemens" for product "Scalance Xm416-4c Firmware" and version " < 6.4"	-	Affected	in	Siemens Search vendor "Siemens"	Scalance Xm416-4c Search vendor "Siemens" for product "Scalance Xm416-4c"	-	-	Safe
Siemens Search vendor "Siemens"	Scalance Xm408-8c Firmware Search vendor "Siemens" for product "Scalance Xm408-8c Firmware"	< 6.4 Search vendor "Siemens" for product "Scalance Xm408-8c Firmware" and version " < 6.4"	-	Affected	in	Siemens Search vendor "Siemens"	Scalance Xm408-8c Search vendor "Siemens" for product "Scalance Xm408-8c"	-	-	Safe
Siemens Search vendor "Siemens"	Scalance Xm408-4c Firmware Search vendor "Siemens" for product "Scalance Xm408-4c Firmware"	< 6.4 Search vendor "Siemens" for product "Scalance Xm408-4c Firmware" and version " < 6.4"	-	Affected	in	Siemens Search vendor "Siemens"	Scalance Xm408-4c Search vendor "Siemens" for product "Scalance Xm408-4c"	-	-	Safe
Siemens Search vendor "Siemens"	Scalance Xm416-4c L3 Firmware Search vendor "Siemens" for product "Scalance Xm416-4c L3 Firmware"	< 6.4 Search vendor "Siemens" for product "Scalance Xm416-4c L3 Firmware" and version " < 6.4"	-	Affected	in	Siemens Search vendor "Siemens"	Scalance Xm416-4c L3 Search vendor "Siemens" for product "Scalance Xm416-4c L3"	-	-	Safe
Siemens Search vendor "Siemens"	Scalance Xm408-8c L3 Firmware Search vendor "Siemens" for product "Scalance Xm408-8c L3 Firmware"	< 6.4 Search vendor "Siemens" for product "Scalance Xm408-8c L3 Firmware" and version " < 6.4"	-	Affected	in	Siemens Search vendor "Siemens"	Scalance Xm408-8c L3 Search vendor "Siemens" for product "Scalance Xm408-8c L3"	-	-	Safe
Siemens Search vendor "Siemens"	Scalance Xm408-4c L3 Firmware Search vendor "Siemens" for product "Scalance Xm408-4c L3 Firmware"	< 6.4 Search vendor "Siemens" for product "Scalance Xm408-4c L3 Firmware" and version " < 6.4"	-	Affected	in	Siemens Search vendor "Siemens"	Scalance Xm408-4c L3 Search vendor "Siemens" for product "Scalance Xm408-4c L3"	-	-	Safe