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On Fri, 3 Feb 2017 14:29:04 -0500 |
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Michael Orlitzky <mjo@g.o> wrote: |
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> > However, it is no rocket science to write a race-free chown command |
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> > in C: Just open the file and use stat() and fchown() to be sure to |
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> > change only files from the "correct" user. |
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> > |
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> > Since this works on the filehandle and not on the filename, I think |
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> > that there is no possibility for an exploit when this is used in the |
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> > above find loop. |
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> |
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> Not a bad idea... we chould ship that safe-chown utility, and then |
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> tell users how to use it to fix their UIDs. The draft that I wrote up |
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> was for the "fixed UID with random fallback" model, but said utility |
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> could still be useful for people who want to change their running |
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> systems to use the same UIDs that would have been chosen by default. |
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Are you sure that said utility isn’t simply “chown --from”? |
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-- |
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Christopher Head |
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