CVE-2021-1353

Cisco StarOS IPv4 Denial of Service Vulnerability

Severity Score

8.6

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A vulnerability in the IPv4 protocol handling of Cisco StarOS could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to a memory leak that occurs during packet processing. An attacker could exploit this vulnerability by sending a series of crafted IPv4 packets through an affected device. A successful exploit could allow the attacker to exhaust the available memory and cause an unexpected restart of the npusim process, leading to a DoS condition on the affected device.

Una vulnerabilidad en el manejo del protocolo IPv4 de Cisco StarOS, podría permitir a un atacante no autenticado remoto causar una condición de denegación de servicio (DoS) en un dispositivo afectado. La vulnerabilidad es debido a una pérdida de memoria que se produce durante el procesamiento de paquetes. Un atacante podría explotar esta vulnerabilidad mediante el envío de una serie de paquetes IPv4 diseñados por medio de un dispositivo afectado. Una explotación con éxito podría permitir al atacante agotar la memoria disponible y causar un reinicio inesperado del proceso npusim, conllevando a una condición DoS en el dispositivo afectado

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

None

Availability

Low

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

2020-11-13 CVE Reserved
2021-01-20 CVE Published
2023-10-06 EPSS Updated
2024-09-17 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-401: Missing Release of Memory after Effective Lifetime

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asr-mem-leak-dos-MTWGHKk3	2023-11-07

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Cisco Search vendor "Cisco"	Staros Search vendor "Cisco" for product "Staros"	< 21.22.0 Search vendor "Cisco" for product "Staros" and version " < 21.22.0"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 5000 Search vendor "Cisco" for product "Asr 5000"	-	-	Safe
Cisco Search vendor "Cisco"	Staros Search vendor "Cisco" for product "Staros"	< 21.22.0 Search vendor "Cisco" for product "Staros" and version " < 21.22.0"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 5500 Search vendor "Cisco" for product "Asr 5500"	-	-	Safe
Cisco Search vendor "Cisco"	Staros Search vendor "Cisco" for product "Staros"	< 21.22.0 Search vendor "Cisco" for product "Staros" and version " < 21.22.0"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 5700 Search vendor "Cisco" for product "Asr 5700"	-	-	Safe
Cisco Search vendor "Cisco"		Virtualized Packet Core-single Instance Search vendor "Cisco" for product "Virtualized Packet Core-single Instance"				-		-		Affected