September 2024
Intermediate to advanced
726 pages
16h 30m
Spanish
Content preview from Libro de cocina bash, 2ª edición
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Capítulo 14. Escribir scripts Shell seguros
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¿Escribir scripts shell seguros? ¿Cómo pueden ser seguros los shell scripts si se puede leer el código fuente?
Cualquier sistema que dependa de ocultar los detalles de implementación está intentando utilizar la seguridad por oscuridad, y eso no es seguridad en absoluto. No hay más que preguntar a los principales fabricantes de software, cuyo código fuente es un secreto comercial celosamente guardado, y sin embargo sus productos son incesantemente vulnerables a exploits escritos por personas que nunca han visto ese código fuente. Contrasta eso con el código de OpenSSH y OpenBSD, que es totalmente abierto, pero muy seguro.
La seguridad por oscuridad nunca funcionará durante mucho tiempo, aunque algunas formas de ella pueden ser una capa adicional de seguridad útil. Por ejemplo, tener demonios asignados para escuchar en números de puerto no estándar mantendrá alejados a muchos de los llamados script-kiddies. Pero la seguridad por oscuridad nunca debe ser la única capa de seguridad porque, tarde o temprano, alguien descubrirá lo que hayas escondido.
Como dice Bruce Schneier, la seguridad es un proceso. No es un producto, un objeto o una técnica, y nunca está acabada. A medida que evolucionan la tecnología, las redes, los ataques y las defensas, también debe hacerlo tu proceso de seguridad. Entonces, ¿qué significa escribir ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.