Messages in this thread | | | From | Kyle Moffett <> | Subject | Re: Why Ext2/3 needs immutable attribute? | Date | Sun, 17 Apr 2005 12:23:02 -0400 |
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On Apr 17, 2005, at 12:12, Xin Zhao wrote: > Thanks for your reply. > > Yes. I know, with immutable, even root cannot modify sensitive > files. What I am curious is if an intruder has root access, he may > have many ways to turn off the immutable protection and modify files. > So immutable is designed just to prevent a valid root from making > silly mistakes? > > Xin
But without the proper capability, root _can't_ change the immutable bit. Of course, that also applies to DAC checks too. Personally, I find the immutable bit most useful at preventing accidents. I have several scripts designed specifically to access the same file, and I want to prevent one of my admins from accidentally editing that file by hand. The best way is with a big comment in the file itself and the immutable bit.
Cheers, Kyle Moffett
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