Change setuid Calls to setreuid, and the Same for setgid.
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As described in section 8.1 of https://people.eecs.berkeley.edu/~daw/papers/setuid-usenix02.pdf, setuid should be avoided because of its inconsistent implementation across different unix systems. Instead, setreuid should be used, as it is more consistent across systems.
wfraser
reviewed
Aug 12, 2023
Add a clippy allow statement and a comment to indicate why the cast is there.
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As described in section 8.1 of https://people.eecs.berkeley.edu/~daw/papers/setuid-usenix02.pdf, setuid should be avoided because of its inconsistent implementation across different unix systems. Instead, setreuid should be used, as it is more consistent across systems.
As well, in the execute function there was a small snipped of code that I couldn't see why it existed, so I refactored it slightly.
It could be worth looking into also forcing the
chdirdirectory, to be in thechrootdirectory, if you are enabling achroot. As well, then it would be possible to reliably set thePWDenvironment variable. ThePWDenvironment variable is not changed by thechroot, although it is possible that the current working directory is.