// For flags

CVE-2019-15256

Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software IKEv1 Denial of Service Vulnerability

Severity Score

8.6
*CVSS v3.1

Exploit Likelihood

1.2%
*EPSS

Affected Versions

28
*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Attend
*SSVC
Descriptions

A vulnerability in the Internet Key Exchange version 1 (IKEv1) feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to trigger a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to improper management of system memory. An attacker could exploit this vulnerability by sending malicious IKEv1 traffic to an affected device. The attacker does not need valid credentials to authenticate the VPN session, nor does the attacker's source address need to match a peer statement in the crypto map applied to the ingress interface of the affected device. An exploit could allow the attacker to exhaust system memory resources, leading to a reload of an affected device.

Una vulnerabilidad en la funcionalidad Internet Key Exchange versión 1 (IKEv1) del Software Cisco Adaptive Security Appliance (ASA) y el Software Cisco Firepower Threat Defense (FTD), podría permitir a un atacante remoto no autenticado desencadenar una recarga de un dispositivo afectado, resultando en un condición de denegación de servicio (DoS). La vulnerabilidad es debido a una administración inapropiada de la memoria del sistema. Un atacante podría explotar esta vulnerabilidad mediante el envío de tráfico malicioso IKEv1 hacia un dispositivo afectado. El atacante no necesita credenciales válidas para autenticar la sesión VPN, ni la dirección de origen del atacante debe coincidir con una declaración de peer en el mapa criptográfico aplicado a la interfaz de entrada del dispositivo afectado. Una explotación podría permitir al atacante agotar los recursos de memoria del sistema, conllevando a la recarga de un dispositivo afectado.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
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:Attend
Exploitation
None
Automatable
Yes
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2019-08-20 CVE Reserved
  • 2019-10-02 CVE Published
  • 2024-11-19 CVE Updated
  • 2025-03-30 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-399: Resource Management Errors
  • CWE-400: Uncontrolled Resource Consumption
CAPEC
Affected Vendors, Products, and Versions (28)