Re: Help! File permissions keep changing...
On Wed, Feb 18, 2004 at 01:59:37PM +0100, Javier Fernández-Sanguino Peña wrote:
That is, of course, if the partitions in the system have not been setup
properly.
What "properly"? Use a symlink instead of a hard link, you get the same
result but with a different race. Or use the old "make a deep directory
tree then move it out of the way" trick. There are a lot of races and
the bad guy only has to win one. As a matter of fact coreutils is
eliminating a lot of these but it's bad to rely on having the latest &
greatest version, and even the latest in greatest there are certain
operations that might be problematic.
I assumed they were ok, he _did_ say that he was changing file
permissions and owners manually.
manually is a somewhat different beast than automatically. There are
some tricks to play to leave a process waiting for someone to execute
this sort of command an exploit it, but it's a lot easier (and more
reliable) to exploit something running out of a cron job. (Because you
can try over and over until you get it right.)
Mike Stone
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