// For flags

CVE-2019-1921

Cisco Email Security Appliance Content Filter Bypass Vulnerability

Severity Score

7.5
*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Attend
*SSVC
Descriptions

A vulnerability in the attachment scanning of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to bypass configured content filters on the device. The vulnerability is due to improper input validation of the email body. An attacker could exploit this vulnerability by naming a malicious attachment with a specific pattern. A successful exploit could allow the attacker to bypass configured content filters that would normally block the attachment.

Una vulnerabilidad en el escaneo de archivos adjuntos del software AsyncOS de Cisco para Email Security Appliance (ESA) de Cisco, podría permitir a un atacante remoto no identificado omitir los filtros de contenido configurados en el dispositivo. La vulnerabilidad es debido a una comprobación de entrada inapropiada del cuerpo del correo electrónico. Un atacante podría aprovechar esta vulnerabilidad al nombrar un archivo adjunto malicioso con un patrón específico. Una operación con éxito podría permitir al atacante omitir los filtros de contenido configurados que normalmente bloquearían el archivo adjunto.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
Low
Availability
None
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
None
Integrity
Partial
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:Attend
Exploitation
None
Automatable
Yes
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2018-12-06 CVE Reserved
  • 2019-07-06 CVE Published
  • 2023-03-08 EPSS Updated
  • 2024-11-19 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-20: Improper Input Validation
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"
 12.0.0-419
Search vendor "Cisco" for product "Email Security Appliance" and version "12.0.0-419"
-
Affected