// For flags

CVE-2022-20960

 

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 Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated remote attacker to cause a denial of service (DoS) condition on an affected device.
This vulnerability is due to improper handling of certain TLS connections that are processed by an affected device. An attacker could exploit this vulnerability by establishing a large number of concurrent TLS connections to an affected device. A successful exploit could allow the attacker to cause the device to drop new TLS email messages that come from the associated email servers. Exploitation of this vulnerability does not cause the affected device to unexpectedly reload. The device will recover autonomously within a few hours of when the attack is halted or mitigated.

Una vulnerabilidad en el software Cisco AsyncOS para Cisco Email Security Appliance (ESA) podría permitir que un atacante remoto no autenticado cause una condición de Denegación de Servicio (DoS) en un dispositivo afectado. Esta vulnerabilidad se debe al manejo inadecuado de ciertas conexiones TLS que son procesadas por un dispositivo afectado. Un atacante podría aprovechar esta vulnerabilidad estableciendo una gran cantidad de conexiones TLS simultáneas a un dispositivo afectado. Un exploit exitoso podría permitir al atacante hacer que el dispositivo elimine nuevos mensajes de correo electrónico TLS que provienen de los servidores de correo electrónico asociados. La explotación de esta vulnerabilidad no hace que el dispositivo afectado se recargue inesperadamente. El dispositivo se recuperará de forma autónoma unas pocas horas después de que se detenga o mitigue el ataque.

*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
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-11-02 CVE Reserved
  • 2022-11-03 CVE Published
  • 2024-05-26 EPSS Updated
  • 2024-08-03 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-295: Improper Certificate Validation
  • 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"
 Email Security Appliance
Search vendor "Cisco" for product "Email Security Appliance"
 < 14.2.1-015
Search vendor "Cisco" for product "Email Security Appliance" and version " < 14.2.1-015"
-
Affected
Cisco
Search vendor "Cisco"
 Email Security Appliance
Search vendor "Cisco" for product "Email Security Appliance"
 >= 14.3.0 < 14.3.0-020
Search vendor "Cisco" for product "Email Security Appliance" and version " >= 14.3.0 < 14.3.0-020"
-
Affected