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Systemd Looks to Replace sudo with run0
(news.itsfoss.com)
This just sounds like a bad idea, a solution in search of a problem. Sure, sudo is a setuid binary, but it's a fairly simple program, and at some point, you have to trust the code. It's also a very fundamental piece of the system that you want to always work, even (especially!) when other things get borked. The brief description of run0 already has too many potential points of failure.
sudo is a setuid binary, but it’s a fairly simple program
Some people would disagree to this.
The brief description of run0 already has too many potential points of failure.
If the "listener" is PID1, which will run the privileged command, in theory, it would be quite bullet proof (in a working system PID1 is always there). But since this is systemd, PID1 is much more than that and much more complex. On the other hand spawning another daemon from PID1 to be the "listener" makes it, perhaps, even more complicated. You'd have to make sure the listener is always running and have some process supervisor there to watch if it exits... and maybe even a watchdog polling it to make sure it isn't frozen.
So my conclusion is the same as yours:
a solution in search of a problem
We already have a working solution. Have a well written SUID program. I've been using doas for some years now. It's simple enough that I trust it.
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it took less than a day for someone to break run0 totally open, so basically, you have a choice between a well tested/debugged sudo and this new thing which may eventually mature
As far as I know, the exploit you are referring to, wasn't actually a vulnerability. https://youtu.be/awkoa_WxFIg?feature=shared&t=659 Although feel free to correct me on that one
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Never had an issue.
Might look for a replacement should an issue arise.
Been driving Linux since sarge.
I'm not systemd user, and I generally see this absorbing as much as possible as a terrible practice. I don't usually comment on systemd stuff, since I'm happy just not being forced to use it.
However, even though I don't use it, the decision of people managing systemd really affects non systemd users. See by succeeding in getting all major distros into become systemd distros (somehow now governed by RH, if anyone cares), everything systemd absorbs tend to leave alternatives sooner or later deprecated, or abandoned.
Even autofs is no longer part of some official repos, given systemd has its own auto mount/unmount functionality... And there are several other examples...
At any rate, hopefully the more bloated systemd, doesn't make it the more vulnerable. And also hopefully, doesn't make life worse and worse to non systemd distros and users...
BTW, before sudo there was su, so a life without sudo is possible, :)
this post was submitted on 09 May 2024
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