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-618 Variante Incompleto
Exposed Unsafe ActiveX Method
This vulnerability occurs when an ActiveX control, designed for web browsers, exposes methods that bypass the browser's built-in security restrictions. These unsafe methods can perform actions…
Definición
What is CWE-618?
This vulnerability occurs when an ActiveX control, designed for web browsers, exposes methods that bypass the browser's built-in security restrictions. These unsafe methods can perform actions outside the browser's intended security boundaries, such as those defined by zones or domains.
ActiveX controls operate with high-level system permissions, granting them far more access to the operating system than standard web scripts like JavaScript. When a control exposes a method without proper safeguards, attackers can potentially invoke it from a malicious webpage. The risk level depends entirely on what the exposed method does and whether it validates any input it receives.
Without checks to verify the origin or integrity of the call, these dangerous methods become an open gateway. Attackers can exploit them to perform unauthorized actions on a user's system, directly from the browser. The core issue is the combination of excessive system privileges and a lack of validation for who is calling the method or what data they are sending.
Impacto en el mundo real
Real-world CVEs caused by CWE-618
-
download a file to arbitrary folders.
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control downloads and executes a url in a parameter
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resultant buffer overflow
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-618
- Implementation If you must expose a method, make sure to perform input validation on all arguments, and protect against all possible vulnerabilities.
- Architecture and Design Use code signing, although this does not protect against any weaknesses that are already in the control.
- Architecture and Design / System Configuration Where possible, avoid marking the control as safe for scripting.
Señales de detección
How to detect CWE-618
CWE-618
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-618?
¿Qué gravedad tiene CWE-618?
¿Qué lenguajes o plataformas se ven afectados por CWE-618?
¿Cómo puedo prevenir CWE-618?
¿Cómo detecta y corrige Plexicus CWE-618?
¿Dónde puedo aprender más sobre CWE-618?
Frequently asked questions
¿Qué es CWE-618?
This vulnerability occurs when an ActiveX control, designed for web browsers, exposes methods that bypass the browser's built-in security restrictions. These unsafe methods can perform actions outside the browser's intended security boundaries, such as those defined by zones or domains.
¿Qué gravedad tiene CWE-618?
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-618?
MITRE no ha especificado plataformas afectadas para esta CWE — puede aplicar a la mayoría de los stacks de aplicaciones.
¿Cómo puedo prevenir CWE-618?
If you must expose a method, make sure to perform input validation on all arguments, and protect against all possible vulnerabilities. Use code signing, although this does not protect against any weaknesses that are already in the control.
¿Cómo detecta y corrige Plexicus CWE-618?
El motor SAST de Plexicus detecta la firma de flujo de datos para CWE-618 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-618?
MITRE publica la definición canónica en https://cwe.mitre.org/data/definitions/618.html. También puedes consultar la documentación de OWASP y NIST para guías relacionadas.
Debilidades relacionadas
Weaknesses related to CWE-618
CWE-749 Padre
Exposed Dangerous Method or Function
This vulnerability occurs when a software component exposes an API or interface containing a high-risk function that lacks proper access…
CWE-782 Hermano
Exposed IOCTL with Insufficient Access Control
This vulnerability occurs when a system exposes an IOCTL (Input/Output Control) interface that performs sensitive operations, but fails to…
¿Listo para validar lo que importa?
Listo para validar lo que importa.
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