CWE-274 Base Borrador

Improper Handling of Insufficient Privileges

This vulnerability occurs when an application fails to properly manage situations where it lacks the necessary permissions to execute an action. This flawed handling can lead to crashes, data…

Definición

What is CWE-274?

This vulnerability occurs when an application fails to properly manage situations where it lacks the necessary permissions to execute an action. This flawed handling can lead to crashes, data corruption, or unintended security bypasses.
Insufficient privilege handling flaws typically arise when developers assume an operation will always succeed, neglecting to implement robust error-checking for permission failures. Instead of gracefully degrading or informing the user, the application might throw a raw exception, log sensitive data, or enter an unstable state. This creates a reliability issue that attackers can potentially exploit to cause denial-of-service or gather internal system information. To prevent this, always validate permissions before performing sensitive operations and implement consistent, secure error handling that doesn't leak details. Managing these authorization checks at scale across a complex application is difficult; an ASPM like Plexicus can help you track and remediate these logic flaws across your entire stack by correlating runtime behavior with code-level patterns.
Impacto en el mundo real

Real-world CVEs caused by CWE-274

  • CVE-2001-1564

    System limits are not properly enforced after privileges are dropped.

  • CVE-2005-3286

    Firewall crashes when it can't read a critical memory block that was protected by a malicious process.

  • CVE-2005-1641

    Does not give admin sufficient privileges to overcome otherwise legitimate user actions.

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 pseudo

MITRE no ha publicado un ejemplo de código para esta CWE. El patrón siguiente es ilustrativo — consulta Recursos para referencias canónicas.

Vulnerable pseudo 
// Example pattern — see MITRE for the canonical references.
function handleRequest(input) {
  // Untrusted input flows directly into the sensitive sink.
  return executeUnsafe(input);
}
Ejemplo de código seguro

Secure pseudo

Seguro pseudo 
// Validate, sanitize, or use a safe API before reaching the sink.
function handleRequest(input) {
  const safe = validateAndEscape(input);
  return executeWithGuards(safe);
}
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-274

  • Architecture Use safe-by-default frameworks and APIs that prevent the unsafe pattern from being expressible.
  • Implementation Validate input at trust boundaries; use allowlists, not denylists.
  • Implementation Apply the principle of least privilege to credentials, file paths, and runtime permissions.
  • Testing Cover this weakness in CI: SAST rules + targeted unit tests for the data flow.
  • Operation Monitor logs for the runtime signals listed in the next section.
Señales de detección

How to detect CWE-274

Automated Static Analysis High

Automated static analysis, commonly referred to as Static Application Security Testing (SAST), can find some instances of this weakness by analyzing source code (or binary/compiled code) without having to execute it. Typically, this is done by building a model of data flow and control flow, then searching for potentially-vulnerable patterns that connect "sources" (origins of input) with "sinks" (destinations where the data interacts with external components, a lower layer such as the OS, etc.)

Auto-corrección de Plexicus

Plexicus detecta automáticamente CWE-274 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.

Solicitar demo Probar Plexicus gratis
Preguntas frecuentes

Frequently asked questions

¿Qué es CWE-274?

This vulnerability occurs when an application fails to properly manage situations where it lacks the necessary permissions to execute an action. This flawed handling can lead to crashes, data corruption, or unintended security bypasses.

¿Qué gravedad tiene CWE-274?

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-274?

MITRE no ha especificado plataformas afectadas para esta CWE — puede aplicar a la mayoría de los stacks de aplicaciones.

¿Cómo puedo prevenir CWE-274?

Use safe-by-default frameworks, validate untrusted input at trust boundaries, and apply the principle of least privilege. Cover the data-flow signature in CI with SAST.

¿Cómo detecta y corrige Plexicus CWE-274?

El motor SAST de Plexicus detecta la firma de flujo de datos para CWE-274 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-274?

MITRE publica la definición canónica en https://cwe.mitre.org/data/definitions/274.html. También puedes consultar la documentación de OWASP y NIST para guías relacionadas.

Debilidades relacionadas

Weaknesses related to CWE-274

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CWE-390 Hermano

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Declaration of Catch for Generic Exception

This weakness occurs when code catches a generic exception type like 'Exception' or 'Throwable', which can hide specific errors and create…

Recursos

Further reading

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