Comment by collinfunk
7 hours ago
Well the TOCTOU issues do not require you to run untrusted scripts to be exploited. Another user on your system can use a legitimate command that you may run to make changes to files they shouldn’t be able to, or further escalate privileges.
Fair point. Though tbh I still think the user-isolation security for Linux is only really suited for the University/company threat model, where you generally trust users not to actually use exploits because they would get expelled/fired.
If you allow a completely untrusted user onto your system I think your chances of staying secure are low.
Then why rewrite coreutils in rust? TOCTOU isn't exact some new concept. Neither are https://owasp.org/Top10/2025/ (most of which a good web framework will prevent or migrate), and switching to rust (which as far as I know) won't bring you a safer web framework like django or rails.