// For flags

CVE-2019-1955

Cisco Email Security Appliance Header Injection Vulnerability

Severity Score

7.5
*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 Sender Policy Framework (SPF) functionality of Cisco AsyncOS Software for Cisco Email Security Appliances (ESA) could allow an unauthenticated, remote attacker to bypass configured user filters on the device. The vulnerability is due to incomplete input and validation checking mechanisms for certain SPF messages that are sent to an affected device. An attacker could exploit this vulnerability by sending a customized SPF packet to an affected device. A successful exploit could allow the attacker to bypass the header filters that are configured for the affected device, which could allow malicious content to pass through the device.

Una vulnerabilidad en la funcionalidad Sender Policy Framework (SPF) del software AsyncOS de Cisco para Email Security Appliances (ESA) de Cisco, podría permitir a un atacante remoto no autenticado omitir los filtros de usuario configurados en el dispositivo. La vulnerabilidad es debido a mecanismos de entrada y comprobación de validación incompletos para ciertos mensajes SPF que se envían a un dispositivo afectado. Un atacante podría explotar esta vulnerabilidad enviando un paquete SPF personalizado hacia un dispositivo afectado. Una explotación con éxito podría permitir al atacante omitir los filtros de encabezado que están configurados para el dispositivo afectado, lo que podría permitir que el contenido malicioso pase a través del dispositivo.

*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
Unchanged
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
  • 2019-08-08 CVE Published
  • 2023-07-08 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 Firmware
Search vendor "Cisco" for product "Email Security Appliance Firmware"
 < 4.0mr1
Search vendor "Cisco" for product "Email Security Appliance Firmware" and version " < 4.0mr1"
-
Affected
Cisco
Search vendor "Cisco"
 Email Security Appliance Firmware
Search vendor "Cisco" for product "Email Security Appliance Firmware"
 12.0
Search vendor "Cisco" for product "Email Security Appliance Firmware" and version "12.0"
-
Affected