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-282 Clase Borrador
Improper Ownership Management
This vulnerability occurs when a system incorrectly assigns or fails to verify which user or process rightfully controls a specific object or resource.
Definición
What is CWE-282?
This vulnerability occurs when a system incorrectly assigns or fails to verify which user or process rightfully controls a specific object or resource.
At its core, this flaw is about broken trust in access control. It happens when software doesn't properly track or validate the true 'owner' of a file, memory block, database record, or system object. This can allow unauthorized users to delete, modify, or access resources they shouldn't, simply because the system believes they own them. Think of it as handing your house keys to a stranger because a faulty system incorrectly listed them as the homeowner.
For developers, the main risk is that operations which should be restricted to a resource's creator—like deletion or permission changes—become available to others. To prevent this, always explicitly validate ownership through a trusted authority (like a kernel or central service) before performing sensitive actions. Never rely on unverified user-supplied claims or transient identifiers that can be forged or reused. Implement clear, centralized ownership lifecycle management for all critical resources.
Impacto en el mundo real
Real-world CVEs caused by CWE-282
-
Program runs setuid root but relies on a configuration file owned by a non-root user.
Cómo lo explotan los atacantes
Ruta del atacante paso a paso
- 1
This function is part of a privileged program that takes input from users with potentially lower privileges.
- 2
This code does not confirm that the process to be killed is owned by the requesting user, thus allowing an attacker to kill arbitrary processes.
- 3
This function remedies the problem by checking the owner of the process before killing it:
Ejemplo de código vulnerable
Vulnerable Python
This function is part of a privileged program that takes input from users with potentially lower privileges.
def killProcess(processID):
os.kill(processID, signal.SIGKILL) Ejemplo de código seguro
Secure Python
This function remedies the problem by checking the owner of the process before killing it:
def killProcess(processID):
user = getCurrentUser()
```
#Check process owner against requesting user*
if getProcessOwner(processID) == user:
```
os.kill(processID, signal.SIGKILL)
return
else:
print("You cannot kill a process you don't own")
return 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-282
- Architecture and Design / Operation Very carefully manage the setting, management, and handling of privileges. Explicitly manage trust zones in the software.
Señales de detección
How to detect CWE-282
Plexicus detecta automáticamente CWE-282 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.
Preguntas frecuentes ¿Qué es CWE-282?
¿Qué gravedad tiene CWE-282?
¿Qué lenguajes o plataformas se ven afectados por CWE-282?
¿Cómo puedo prevenir CWE-282?
¿Cómo detecta y corrige Plexicus CWE-282?
¿Dónde puedo aprender más sobre CWE-282?
Frequently asked questions
¿Qué es CWE-282?
This vulnerability occurs when a system incorrectly assigns or fails to verify which user or process rightfully controls a specific object or resource.
¿Qué gravedad tiene CWE-282?
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-282?
MITRE no ha especificado plataformas afectadas para esta CWE — puede aplicar a la mayoría de los stacks de aplicaciones.
¿Cómo puedo prevenir CWE-282?
Very carefully manage the setting, management, and handling of privileges. Explicitly manage trust zones in the software.
¿Cómo detecta y corrige Plexicus CWE-282?
El motor SAST de Plexicus detecta la firma de flujo de datos para CWE-282 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-282?
MITRE publica la definición canónica en https://cwe.mitre.org/data/definitions/282.html. También puedes consultar la documentación de OWASP y NIST para guías relacionadas.
Debilidades relacionadas
Weaknesses related to CWE-282
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