// For flags

CVE-2021-1367

Cisco NX-OS Software Protocol Independent Multicast Denial of Service Vulnerability

Severity Score

4.3
*CVSS v3.1

Exploit Likelihood

< 1%
*EPSS

Affected Versions

42
*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track
*SSVC
Descriptions

A vulnerability in the Protocol Independent Multicast (PIM) feature of Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by sending a crafted PIM packet to an affected device. A successful exploit could allow the attacker to cause a traffic loop, resulting in a DoS condition.

Una vulnerabilidad en la funcionalidad Protocol Independent Multicast (PIM) del software Cisco NX-OS, podría permitir a un atacante adyacente no autenticado causar una condición de denegación de servicio (DoS) en un dispositivo afectado.&#xa0;Esta vulnerabilidad es debido a una comprobación de entrada insuficiente.&#xa0;Un atacante podría explotar esta vulnerabilidad mediante el envío de un paquete PIM diseñado a un dispositivo afectado.&#xa0;Una explotación con éxito podría permitir al atacante causar un bucle de tráfico, lo que resultaría en una condición DoS

*Credits: N/A
CVSS Scores
Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
Attack Vector
Adjacent
Attack Complexity
Medium
Authentication
None
Confidentiality
None
Integrity
None
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2020-11-13 CVE Reserved
  • 2021-02-24 CVE Published
  • 2024-11-08 CVE Updated
  • 2025-03-30 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-20: Improper Input Validation
CAPEC
References (1)
Affected Vendors, Products, and Versions (42)