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.)
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
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System limits are not properly enforced after privileges are dropped.
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Firewall crashes when it can't read a critical memory block that was protected by a malicious process.
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Does not give admin sufficient privileges to overcome otherwise legitimate user actions.
Cómo lo explotan los atacantes
Ruta del atacante paso a paso
- 1
Identifica una ruta de código que maneje entrada no confiable sin validación.
- 2
Crea un payload que ejercite el comportamiento inseguro — inyección, traversal, overflow o abuso de lógica.
- 3
Envía el payload a través de una solicitud normal y observa la reacción de la aplicación.
- 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.
// 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
// 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
CWE-274
Don't catalog this weakness. Prove it's reachable.
Plexicus turns CWE catalogs into evidence: every CWE-pattern is matched against your real code graph, reach is proven on a sandbox clone, and verified findings ship as reviewed PRs.
Preguntas frecuentes ¿Qué es CWE-274?
¿Qué gravedad tiene CWE-274?
¿Qué lenguajes o plataformas se ven afectados por CWE-274?
¿Cómo puedo prevenir CWE-274?
¿Cómo detecta y corrige Plexicus CWE-274?
¿Dónde puedo aprender más sobre CWE-274?
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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Missing Report of Error Condition
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Use of NullPointerException Catch to Detect NULL Pointer Dereference
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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…
¿Listo para validar lo que importa?
Listo para validar lo que importa.
Plexicus es Proof-Driven AppSec: hallazgos validados, comprensión contextual y remediación revisada — anclada en evidencia, acotada contigo.