// For flags

CVE-2020-3168

Cisco Nexus 1000V Switch for VMware vSphere Secure Login Enhancements Denial of Service Vulnerability

Severity Score

7.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

A vulnerability in the Secure Login Enhancements capability of Cisco Nexus 1000V Switch for VMware vSphere could allow an unauthenticated, remote attacker to cause an affected Nexus 1000V Virtual Supervisor Module (VSM) to become inaccessible to users through the CLI. The vulnerability is due to improper resource allocation during failed CLI login attempts when login parameters that are part of the Secure Login Enhancements capability are configured on an affected device. An attacker could exploit this vulnerability by performing a high amount of login attempts against the affected device. A successful exploit could cause the affected device to become inaccessible to other users, resulting in a denial of service (DoS) condition requiring a manual power cycle of the VSM to recover.

Una vulnerabilidad en la capacidad Secure Login Enhancements de Cisco Nexus 1000V Switch para VMware vSphere, podría permitir a un atacante remoto no autenticado causar que un Nexus 1000V Virtual Supervisor Module (VSM) afectado quede inaccesible para los usuarios por medio de la CLI. La vulnerabilidad es debido a una asignación de recursos inapropiada durante intentos fallidos de inicio de sesión de la CLI cuando los parámetros de inicio de sesión que forman parte de la capacidad Secure Login Enhancement sean configurados sobre un dispositivo afectado. Un atacante podría explotar esta vulnerabilidad al realizar una gran cantidad de intentos de inicio de sesión contra el dispositivo afectado. Una explotación con éxito podría causar que el dispositivo afectado se vuelva inaccesible para otros usuarios, resultando en una condición de denegación de servicio (DoS) que requiere un ciclo de energía manual del VSM para recuperarse.

*Credits: N/A
CVSS Scores
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
  • 2019-12-12 CVE Reserved
  • 2020-02-26 CVE Published
  • 2023-03-07 EPSS Updated
  • 2024-09-17 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-399: Resource Management Errors
  • CWE-400: Uncontrolled Resource Consumption
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"
 Nx-os
Search vendor "Cisco" for product "Nx-os"
 5.2\(1\)sv3\(4.1a\)
Search vendor "Cisco" for product "Nx-os" and version "5.2\(1\)sv3\(4.1a\)"
vsphere
Affected
in Cisco
Search vendor "Cisco"
 Nexus 1000v
Search vendor "Cisco" for product "Nexus 1000v"
--
Safe