// For flags

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

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Attend
*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:Attend
Exploitation
None
Automatable
Yes
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2020-11-13 CVE Reserved
  • 2021-01-20 CVE Published
  • 2023-10-06 EPSS Updated
  • 2024-11-12 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-401: Missing Release of Memory after Effective Lifetime
CAPEC
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