F11: Bug in sh-4.0 source build-in command
Konstantin Svist
fry.kun at gmail.com
Fri Aug 7 17:21:37 UTC 2009
John Cornelius wrote:
> It's not a bug, it's supposed to work that way. The behavior can be
> changed by:
> sh-4.0# PATH=$PATH:.
I used to do this because that's how Windows does it -- until I realized
how bad of an idea it really is.
Suppose you're root, looking around in a user-writable directory. And
suppose that some user placed a malicious executable called "ls" in that
directory (maybe as simple as echo "rm -rf /" >> ls; chmod 777 ls).
Suddenly, you're executing "ls" - but not the one you think.
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