// For flags

CVE-2021-40122

Cisco Meeting Server Call Bridge 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

Track
*SSVC
Descriptions

A vulnerability in an API of the Call Bridge feature of Cisco Meeting Server could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. This vulnerability is due to improper handling of large series of message requests. An attacker could exploit this vulnerability by sending a series of messages to the vulnerable API. A successful exploit could allow the attacker to cause the affected device to reload, dropping all ongoing calls and resulting in a DoS condition.

Una vulnerabilidad en una API de la función Call Bridge de Cisco Meeting Server podría permitir a un atacante remoto no autenticado causar una condición de denegación de servicio (DoS). Esta vulnerabilidad es debido al manejo inapropiado de grandes series de peticiones de mensajes. Un atacante podría aprovechar esta vulnerabilidad mediante el envío de una serie de mensajes a la API vulnerable. Una explotación con éxito podría permitir al atacante causar la recarga del dispositivo afectado, dejando caer todas las llamadas en curso y resultando en una condición de DoS

*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
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Network
Attack Complexity
Low
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
  • 2021-08-25 CVE Reserved
  • 2021-10-21 CVE Published
  • 2024-07-05 EPSS Updated
  • 2024-11-07 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-399: Resource Management Errors
  • CWE-404: Improper Resource Shutdown or Release
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"
 Meeting Server
Search vendor "Cisco" for product "Meeting Server"
 <= 3.1
Search vendor "Cisco" for product "Meeting Server" and version " <= 3.1"
-
Affected
Cisco
Search vendor "Cisco"
 Meeting Server
Search vendor "Cisco" for product "Meeting Server"
 >= 3.2 < 3.2.3
Search vendor "Cisco" for product "Meeting Server" and version " >= 3.2 < 3.2.3"
-
Affected