// For flags

CVE-2020-3548

Cisco Email Security Appliance Denial Of Service Vulnerability

Severity Score

5.3
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Attend
*SSVC
Descriptions

A vulnerability in the Transport Layer Security (TLS) protocol implementation of Cisco AsyncOS software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to cause high CPU usage on an affected device, resulting in a denial of service (DoS) condition.
The vulnerability is due to inefficient processing of incoming TLS traffic. An attacker could exploit this vulnerability by sending a series of crafted TLS packets to an affected device. A successful exploit could allow the attacker to trigger a prolonged state of high CPU utilization. The affected device would still be operative, but response time and overall performance may be degraded.There are no workarounds that address this vulnerability.

Una vulnerabilidad en la implementación del protocolo Transport Layer Security (TLS) del software Cisco AsyncOS para Cisco Email Security Appliance (ESA) podría permitir que un atacante remoto no autenticado provoque un alto uso de la CPU en un dispositivo afectado, lo que da como resultado una condición de denegación de servicio (DoS). La vulnerabilidad se debe a un procesamiento ineficiente del tráfico TLS entrante. Un atacante podría aprovechar esta vulnerabilidad enviando una serie de paquetes TLS manipulados a un dispositivo afectado. Una explotación exitosa podría permitir al atacante activar un estado prolongado de alto uso de la CPU. El dispositivo afectado seguiría funcionando, pero el tiempo de respuesta y el rendimiento general podrían verse degradados. No existen workarounds que aborden esta vulnerabilidad.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
* Common Vulnerability Scoring System
SSVC
  • Decision:Attend
Exploitation
None
Automatable
Yes
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2019-12-12 CVE Reserved
  • 2024-11-18 CVE Published
  • 2024-11-18 CVE Updated
  • 2024-11-19 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-407: Inefficient Algorithmic Complexity
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
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