Re: FYI: Apache httpd NoFollowSymLink follows symlinks feature

[halfdog <me () halfdog net>]

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Ferenc Kovacs wrote:
> On Fri, Jun 24, 2011 at 5:24 PM, Christian
> Sciberras<uuf6429 () gmail com>  wrote:
> > I think you meant "apache follows symlinks even when
> > -FollowSymLinks is not set". Otherwise it doesn't seem to make
> > sense?
>
> -FollowSymLinks turns off the FollowSymLinks option without
> resetting the other Options. 
> http://wiki.apache.org/httpd/FAQ#Why_do_my_Options_directives_not_have_the_desired_effect.

The
>
FAQ says: "You can usually avoid problems by either finding the
Options directive that already applies to a specific directory and
changing it, or by putting your Options directive inside the most
specific possible <Directory> section."

The option is in the most specific directory section and it also takes
effect, returning forbidden on http request. But when you use the
RenameLoop program in parallel, it fails to detect the symlink and
delivers the linked data. This specific TOCTOU issue is known and part
of the apache specification.

- -- 
http://www.halfdog.net/
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