CWE-1327 Base Incompleto

Binding to an Unrestricted IP Address

This vulnerability occurs when software or a service is configured to bind to the IP address 0.0.0.0 (or :: in IPv6), which acts as a wildcard, accepting connections from any network interface on…

Definición

What is CWE-1327?

This vulnerability occurs when software or a service is configured to bind to the IP address 0.0.0.0 (or :: in IPv6), which acts as a wildcard, accepting connections from any network interface on the host system.
Binding to 0.0.0.0 tells the server to listen for connections on all available network interfaces—including public, private, and localhost addresses. While this is sometimes necessary for development or specific services, it often unintentionally exposes the service to networks it shouldn't be accessible from, like the public internet, when only a specific internal or management network was intended. This creates a significant security gap by bypassing network segmentation and firewall controls. An attacker who can reach any of the host's interfaces can potentially connect to the service. Developers should explicitly bind to specific, intended IP addresses (like 127.0.0.1 for local-only or a specific internal IP) to enforce the principle of least privilege and reduce the system's attack surface.
Impacto en el mundo real

Real-world CVEs caused by CWE-1327

  • CVE-2022-21947

    Desktop manager for Kubernetes and container management binds a service to 0.0.0.0, allowing users on the network to make requests to a dashboard API.

Cómo lo explotan los atacantes

Ruta del atacante paso a paso

  1. 1

    Identifica una ruta de código que maneje entrada no confiable sin validación.

  2. 2

    Crea un payload que ejercite el comportamiento inseguro — inyección, traversal, overflow o abuso de lógica.

  3. 3

    Envía el payload a través de una solicitud normal y observa la reacción de la aplicación.

  4. 4

    Itera hasta que la respuesta filtre datos, ejecute código del atacante o escale privilegios.

Ejemplo de código vulnerable

Vulnerable Other

The following code snippet uses 0.0.0.0 in a Puppet script.

Vulnerable Other 
signingserver::instance {

```
   "nightly-key-signing-server": 
  	 listenaddr => "0.0.0.0",
  	 port => "9100",
  	 code_tag => "SIGNING_SERVER",
   }
Ejemplo de código seguro

Secure Other

The Puppet code snippet is used to provision a signing server that will use 0.0.0.0 to accept traffic. However, as 0.0.0.0 is unrestricted, malicious users may use this IP address to launch frequent requests and cause denial of service attacks.

Seguro Other 
signingserver::instance {

```
   "nightly-key-signing-server": 
  	 listenaddr => "127.0.0.1",
  	 port => "9100",
  	 code_tag => "SIGNING_SERVER",
   }
What changed: the unsafe sink is replaced (or the input is validated/escaped) so the same payload no longer triggers the weakness.
Lista de prevención

How to prevent CWE-1327

  • System Configuration Assign IP addresses that are not 0.0.0.0.
  • System Configuration Unwanted connections to the configured server may be denied through a firewall or other packet filtering measures.
Señales de detección

How to detect CWE-1327

SAST High

Ejecuta análisis estático (SAST) sobre el código buscando el patrón inseguro en el flujo de datos.

DAST Moderate

Ejecuta pruebas dinámicas de seguridad de aplicaciones (DAST) contra el endpoint en vivo.

Runtime Moderate

Vigila los logs en tiempo de ejecución para detectar trazas de excepción inusuales, entradas malformadas o intentos de bypass de autorización.

Code review Moderate

Revisión de código: marca cualquier código nuevo que maneje entrada desde esta superficie sin usar los helpers validados del framework.

Auto-corrección de Plexicus

Plexicus detecta automáticamente CWE-1327 y abre un PR de corrección en menos de 60 segundos.

Codex Remedium escanea cada commit, identifica esta debilidad concreta y entrega un pull request listo para revisión con el parche. Sin tickets. Sin traspasos.

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Preguntas frecuentes

Frequently asked questions

¿Qué es CWE-1327?

This vulnerability occurs when software or a service is configured to bind to the IP address 0.0.0.0 (or :: in IPv6), which acts as a wildcard, accepting connections from any network interface on the host system.

¿Qué gravedad tiene CWE-1327?

MITRE no ha publicado una calificación de probabilidad de explotación para esta debilidad. Trátala como de impacto medio hasta que tu modelo de amenazas demuestre lo contrario.

¿Qué lenguajes o plataformas se ven afectados por CWE-1327?

MITRE lists the following affected platforms: Other, Not OS-Specific, Not Architecture-Specific, Web Server, Client Server, Cloud Computing.

¿Cómo puedo prevenir CWE-1327?

Assign IP addresses that are not 0.0.0.0. Unwanted connections to the configured server may be denied through a firewall or other packet filtering measures.

¿Cómo detecta y corrige Plexicus CWE-1327?

El motor SAST de Plexicus detecta la firma de flujo de datos para CWE-1327 en cada commit. Cuando hay coincidencia, nuestro agente Codex Remedium abre un PR de corrección con el código corregido, las pruebas y un resumen de una línea para el revisor.

¿Dónde puedo aprender más sobre CWE-1327?

MITRE publica la definición canónica en https://cwe.mitre.org/data/definitions/1327.html. También puedes consultar la documentación de OWASP y NIST para guías relacionadas.

Debilidades relacionadas

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Recursos

Further reading

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