Received: (qmail 22103 invoked by uid 2012); 17 Mar 1999 00:04:48 -0000
Message-Id: <19990317000448.22102.qmail@hyperreal.org>
Date: 17 Mar 1999 00:04:48 -0000
From: Aidan Cully <aidan@panix.com>
Reply-To: aidan@panix.com
To: apbugs@hyperreal.org
Subject: SuEXEC doesn't work with mod_userdir as well as it should.
X-Send-Pr-Version: 3.2

>Number:         4069
>Category:       suexec
>Synopsis:       SuEXEC doesn't work with mod_userdir as well as it should.
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    apache
>State:          closed
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   apache
>Arrival-Date:   Tue Mar 16 16:10:01 PST 1999
>Closed-Date:    Fri Jan 07 15:15:41 PST 2000
>Last-Modified:  Fri Jan 07 15:15:41 PST 2000
>Originator:     aidan@panix.com
>Release:        1.3.5 -dev
>Organization:
>Environment:
NetBSD byzantium.nyc.access.net 1.3.2 NetBSD 1.3.2 (PANIX-STAFF) #0: Thu Sep 17 17:49:04 EDT 1998     marcotte@juggler.panix.com:/devel/netbsd/1.3.2/src/sys/arch/i386/compile/PANIX-STAFF i386
>Description:
mod_userdir allows an admin to dissociate the /etc/passwd home directory
for a user from the doc that gets returned on a ~username URL request.
SuEXEC only understands the (typical) ~user/public_html/ as a docroot for
individual users, and won't execute requests outside that directory.
>How-To-Repeat:
In httpd.conf:
UserDir /htdocs/userdirs/
put a CGI-script under that userdir, and try to GET it
>Fix:
modify util_script.c to never pass the '~' on the command line to
SuEXEC, and remove the ~user/public_html check from SuEXEC, when an
appropriate directive is in the httpd.conf for the request.  If y'all
accept the patch I recently sent in, the flag already exists in the
URIOwner config directive.
>Release-Note:
>Audit-Trail:
State-Changed-From-To: open-closed
State-Changed-By: coar
State-Changed-When: Fri Jan  7 15:15:41 PST 2000
State-Changed-Why:

suexec doesn't work with mod_userdir at all.  Instead,
it can accept only two locations: the user's actual home
directory (as specified in /etc/passwd), or a subdirectory
of that as specified by the USERDIR_SUFFIX macro.  You
can define USERDIR_SUFFIX with ./configure using
the --suexec-userdir option.  It is a design parameter of
suexec that all possible parameters be specified at
compile-time rather than run-time; this is one of those.
Changing this would weaken suexec's security.  See
<http://www.apache.org/docs/suexec.html> for more info.

Thanks for using Apache!

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