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En MinIO versiones anteriores a RELEASE.2021-03-17T02-33-02Z, se presenta una vulnerabilidad que permite la modificaci\u00f3n por parte de un MITM de los cuerpos de las peticiones que se supone que presentan la integridad garantizada por las firmas de los fragmentos. En una petici\u00f3n PUT que usa la codificaci\u00f3n aws-chunked, MinIO normalmente comprueba las firmas al final de un fragmento. Esta comprobaci\u00f3n puede saltarse si el cliente env\u00eda un tama\u00f1o de fragmento falso que es mucho mayor que los datos reales enviados: el servidor acepta y completa la petici\u00f3n sin llegar nunca al final del fragmento + por tanto sin comprobar nunca la firma del fragmento. Esto se ha corregido en la versi\u00f3n RELEASE.2021-03-17T02-33-02Z. Como soluci\u00f3n, se puede evitar el uso de peticiones de carga de firmas de fragmentos basadas en la codificaci\u00f3n \"aws-chunked\" y, en su lugar, usar TLS. 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