// For flags

CVE-2020-3596

Cisco Expressway Series and TelePresence Video Communication Server 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 the Session Initiation Protocol (SIP) of Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to incorrect handling of incoming SIP traffic. An attacker could exploit this vulnerability by sending a series of SIP packets to an affected device. A successful exploit could allow the attacker to exhaust memory on an affected device, causing it to crash and leading to a DoS condition.

Una vulnerabilidad en el Session Initiation Protocol (SIP) de Cisco Expressway Series y Cisco TelePresence Video Communication Server (VCS), podría permitir a un atacante remoto no autenticado causar una condición de denegación de servicio (DoS) en un dispositivo afectado. La vulnerabilidad es debido al manejo incorrecto del tráfico SIP entrante. Un atacante podría explotar esta vulnerabilidad mediante el envío de una serie de paquetes SIP hacia un dispositivo afectado. Una explotación con éxito podría permitir que el atacante agote la memoria de un dispositivo afectado, causando que se bloquee y conllevando a una condición 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
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2019-12-12 CVE Reserved
  • 2020-10-08 CVE Published
  • 2023-06-24 EPSS Updated
  • 2024-11-13 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-670: Always-Incorrect Control Flow Implementation
  • CWE-789: Memory Allocation with Excessive Size Value
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"
 Expressway
Search vendor "Cisco" for product "Expressway"
 <= x12.6.3
Search vendor "Cisco" for product "Expressway" and version " <= x12.6.3"
-
Affected
Cisco
Search vendor "Cisco"
 Telepresence Video Communication Server
Search vendor "Cisco" for product "Telepresence Video Communication Server"
 <= x12.6.3
Search vendor "Cisco" for product "Telepresence Video Communication Server" and version " <= x12.6.3"
-
Affected