If I've understood correctly, the problem is that someone could use the .. parent directory syntax to request a file/page outside of your $docroot ?

If so, then you may want to consider checking $path before opening the file. Use a regex to see if it contains .. preceded or followed by a / (there may be other possibilities, I haven't thought about it a great deal). If so, then deny the request.

One other security hole you should definitely close, is to use the 3-argument open():

open (FILE, '<', "$docroot$path")

[download]

Otherwise you are open to people crafting a request ending with | which could allow someone to run arbitrary code on your machine.

This is just a couple of things I thought of, there are probably other issues to be aware of as well...

s^^unp(;75N=&9I<V@`ack(u,^;s|\(.+\`|"$`$'\"$&\"\)"|ee;/m.+h/&&print$&

In reply to Re: chroot a directory... by muntfish
in thread chroot a directory... by Anonymous Monk

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