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From "Paul B. Henson" <hen...@acm.org>
Subject Re: [users@httpd] SSI/server-side includes and symbolic links/SymlinkIfOwnerMatch
Date Sat, 04 Oct 2008 02:40:17 GMT
On Fri, 3 Oct 2008, Nilesh Govindrajan wrote:

> /usr/pkg/etc/httpd/htpasswd owner is root and Apache runs as daemon /
> whatever you set in User directive. So its obviously not going to work
> with SymlinkIfOwnerMatch. You need FollowSymLinks in Options.

I don't think you understand my problem/question.

I don't want the symlink followed.

The problem is that SSI successfully follows the symlink when I think it
shouldn't.


> On Sat, Oct 4, 2008 at 2:52 AM, Paul B. Henson <henson@acm.org> wrote:
>
>
>
> 	I'm running Apache 2.2.8, configured with SymlinkIfOwnerMatch and
> 	server-side includes enabled.
>
> 	It looks like the server-side include "include" directive ignores the
> 	setting of SymlinkIfOwnerMatch?
>
> 	For example, let's say I have an htpasswd configuration file outside of the
> 	document root:
>
> 	-rw-r-----   1 root     webservd       7 Oct  3 14:00 /usr/pkg/etc/httpd/htpasswd
>
> 	If I then make a symbolic link to that from a user account:
>
> 	lrwxrwxrwx   1 henson   csupomona      27 Oct  3 14:01 /user/henson/www/pass.html ->
/usr/pkg/etc/httpd/htpasswd
>
>
> 	Access is forbidden, with the following message in the log file:
>
> 	[Fri Oct 03 14:01:51 2008] [error] [client 134.71.248.12] Symbolic link not
> 	allowed or link target not accessible: /export/user/henson/www/pass.html
>
>
> 	However, if I create a server parsed HTML file in the same directory
> 	containing the following:
>
> 	       <!--#include file="pass.html" -->
>
> 	When I request the .shtml file, the contents of the file pointed to by the
> 	symbolic link are included.
>
> 	I had thought that configuring server side includes with IncludesNoExec
> 	was reasonably safe, but it would appear that such a configuration allows
> 	any file readable by the web server itself to be served?
>
> 	I took a look at mod_include.c, the include directive appears to be handled
> 	by the handle_include function which calls either ap_sub_req_lookup_file or
> 	ap_sub_req_lookup_uri depending on whether the include is file or virtual,
> 	and then calls ap_run_sub_req to presumably handle dumping out the content
> 	of the include.
>
> 	As a sub request, I would have intuitively thought it would honor the
> 	configuration setting regarding symbolic links?
>
> 	Am I confused? Is there something wrong with my configuration? Is this an
> 	expected behavior (I searched quite a bit and didn't find anything
> 	relevant)?
>
> 	Thanks much for any help...
>
>
> 	--
> 	Paul B. Henson  |  (909) 979-6361  |  http://www.csupomona.edu/~henson/ <http://www.csupomona.edu/%7Ehenson/>
> 	Operating Systems and Network Analyst  |  henson@csupomona.edu
> 	California State Polytechnic University  |  Pomona CA 91768
>
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>

-- 
Paul B. Henson  |  (909) 979-6361  |  http://www.csupomona.edu/~henson/
Operating Systems and Network Analyst  |  henson@csupomona.edu
California State Polytechnic University  |  Pomona CA 91768

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