sudo without password when connected via ssh
sudo without password when connected via ssh
Hello everyone, I am running Debian on my home server and I also do have a raspberrpi with raspberry pi os.
When I do connect to my raspberry via ssh (with keys, not password) I do not need to enter a password when I do run a command with sudo.
Someone here can guie me on how to replicate that behaviour on Debian 12 stable?
In Debian, you will want to modify your
/etc/sudoersfile to have theNOPASSWDdirective.So where you find something like this in that file:
%sudo ALL=(ALL:ALL) ALLMake it like this:
%sudo ALL=(ALL:ALL) NOPASSWD:ALLIn this example, powers are given to the sudo %group, yours might just say pi or something else the user fits into.
Also, please note that while this is convenient, it does mean anyone with access to your shell has a quick escalation to root privileges. Some program you run has a shell escape vulnerability and gets a shell without a password, this means they also get root without one too. Unlikely to happen, sure, but I believe one should make informed decisions.
Thank you very much!
And thanks for pointing out the security risk. Makes me wonder why this works out of the box on my raspberry. Maybe because I did not set up root user?
Raspbian is sometimes a compromise between security and usability, because it is designed to go into the hands of new users. It also used to ship with a default “pi/rasberry” login hardcoded and IIRC permitted root password login over ssh. Things experience users change or turn off, but needs to start friendly for the rest, you know?
By doing this, they can take a step in the right direction by separating the root and login user, without becoming annoying asking for a password frequently as a newbie copies and pastes tutorial commands all week.
And as I said it’s unlikely, even very unlikely, but just not impossible. Everything comes with a risk, I just believe it’s up to you, not me, what risks mean in your environment. Might be you’d like to have the convenience on the home dev server, but rather have as much security as possible on a public facing one.
Or maybe you’d like to get really dialed in and only allow specific commands to be run without a password, so you can be quick and convenient about rebooting but lock down the rest. Up to you, really, that’s the power of Linux.
Are you sure you're not logging in as root? Try sshing and run
whoami.I did not set up the user root, I gave the normal user superuser-permission during set up
Since you mention setup instead of any manual install screwery, I’d say root(uid 0) is still very real, you just didn’t setup any login for it. Every time you
sudo(substitute-user-do), you(probably uid 1000) are running that command as root instead of you. In fact, justsudo -iand you are now “logged in” as root.Edit: Missed the context. Should still be useful info but you probably are not accidentally remoting into an account you never setup the login for.
Bad idea, this is incredibly insecure
It's my home Server, not accesable from WAN. I'll take the risk