curl https://some-url/ | sh
I see this all over the place nowadays, even in communities that, I would think, should be security conscious. How is that safe? What’s stopping the downloaded script from wiping my home directory? If you use this, how can you feel comfortable?
I understand that we have the same problems with the installed application, even if it was downloaded and installed manually. But I feel the bar for making a mistake in a shell script is much lower than in whatever language the main application is written. Don’t we have something better than “sh” for this? Something with less power to do harm?
I also feel incredibly uncomfortable with this. Ultimately it comes down to if you trust the application or not. If you do then this isn’t really a problem as regardless they’re getting code execution on your machine. If you don’t, well then don’t install the application. In general I don’t like installing applications that aren’t from my distro’s official repositories but mostly because I like knowing at least they trust it and think it’s safe, as opposed to any software that isn’t which is more of an unknown.
Also it’s unlikely for the script to be malicious if the application is not. Further, I’m not sure a manual install really protects anyone from anything. Inexperienced users will go through great lengths and jump through some impressive hoops to try and make something work, to their own detriment sometimes. My favorite example of this is the LTT Linux challenge. apt did EVERYTHING it could think to do to alert that the steam package was broken and he probably didn’t want to install it, and instead of reading the error he just blindly typed out the confirmation statement. Nothing will save a user from ruining their system if they’re bound and determined to do something.
In this case apt should have failed gracefully. There is no reason for it to continue if a package is broken. If you want to force a broken package, that can be it’s own argument.
I’m not sure that would’ve made a difference. It already makes you go out of your way to force a broken package. This has been discussed in places before but the simple fact of the matter is a user that doesn’t understand what they’re doing will perservere. Putting up barriers is a good thing to do to protect users, spending all your time and effort to cover every edge case is a waste of time because users will find ways to shoot themselves in the foot.