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/
Operating Systems and Network Analyst | henson@xxxxxxxxxxxxx
California State Polytechnic University | Pomona CA 91768
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