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This affects the \"uncommented\" default configuration. The issue exists because of an incorrect return value upon failure of input validation."}, {"lang": "es", "value": "La funci\u00f3n smtp_mailaddr en el archivo smtp_session.c en OpenSMTPD versi\u00f3n 6.6, como es usado en OpenBSD versi\u00f3n 6.6 y otros productos, permite a atacantes remotos ejecutar comandos arbitrarios como root por medio de una sesi\u00f3n SMTP dise\u00f1ada, como es demostrado por metacaracteres de shell en un campo MAIL FROM. Esto afecta la configuraci\u00f3n predeterminada \"uncommented\". 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