From nobody@FreeBSD.org  Tue Jan 18 14:42:26 2011
Return-Path: <nobody@FreeBSD.org>
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id EAB0E106566B
	for <freebsd-gnats-submit@FreeBSD.org>; Tue, 18 Jan 2011 14:42:26 +0000 (UTC)
	(envelope-from nobody@FreeBSD.org)
Received: from red.freebsd.org (unknown [IPv6:2001:4f8:fff6::22])
	by mx1.freebsd.org (Postfix) with ESMTP id DA8668FC14
	for <freebsd-gnats-submit@FreeBSD.org>; Tue, 18 Jan 2011 14:42:26 +0000 (UTC)
Received: from red.freebsd.org (localhost [127.0.0.1])
	by red.freebsd.org (8.14.4/8.14.4) with ESMTP id p0IEgQ9w009293
	for <freebsd-gnats-submit@FreeBSD.org>; Tue, 18 Jan 2011 14:42:26 GMT
	(envelope-from nobody@red.freebsd.org)
Received: (from nobody@localhost)
	by red.freebsd.org (8.14.4/8.14.4/Submit) id p0IEgQD8009292;
	Tue, 18 Jan 2011 14:42:26 GMT
	(envelope-from nobody)
Message-Id: <201101181442.p0IEgQD8009292@red.freebsd.org>
Date: Tue, 18 Jan 2011 14:42:26 GMT
From: Ihor R <kaba@goodnet.com.ua>
To: freebsd-gnats-submit@FreeBSD.org
Subject: user can delete file witch owned by root:wheel
X-Send-Pr-Version: www-3.1
X-GNATS-Notify:

>Number:         154112
>Category:       amd64
>Synopsis:       user can delete file witch owned by root:wheel
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    freebsd-amd64
>State:          closed
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Jan 18 14:50:03 UTC 2011
>Closed-Date:    Tue Jan 18 16:22:54 UTC 2011
>Last-Modified:  Tue Jan 18 20:10:08 UTC 2011
>Originator:     Ihor R
>Release:        7.3, 8.0, 8.1
>Organization:
GoodNet Ukraine
>Environment:
FreeBSD bravo.goodnet.com.ua 8.0-RELEASE-p4 FreeBSD 8.0-RELEASE-p4 #0: Fri Aug 27 15:53:40 EEST 2010     root@bravo.goodnet.com.ua:/usr/obj/usr/src/sys/BRAVO  amd64

FreeBSD zorro.goodnet.com.ua 7.3-RELEASE-p2 FreeBSD 7.3-RELEASE-p2 #0: Sat Jul 31 13:54:09 EEST 2010     root@zorro.goodnet.com.ua:/usr/obj/usr/src/sys/PAE-DA  i386

FreeBSD sm5.bitte-hosting.com 8.1-RELEASE-p2 FreeBSD 8.1-RELEASE-p2 #0: Fri Jan 14 20:30:40 UTC 2011     Denis@sm5.bitte-hosting.com:/usr/obj/usr/src/sys/KERN-14-01-2011  amd64
>Description:
The broblem is: 
user can delete files in own home directory owned by root:wheel.

>How-To-Repeat:
as root, change current directory to user home :
#cd ~username/
#touch 1.txt
#chown root:wheel 1.txt

login to system as user:
%id
uid=1001(username) gid=1001(username) groups=1001(username)
%ls -la | grep 1.txt
-rw-r--r--    1 root      wheel             0 Jan 18 16:38 1.txt
%rm -f 1.txt
%ls -la | grep 1.txt
%
>Fix:


>Release-Note:
>Audit-Trail:
State-Changed-From-To: open->closed 
State-Changed-By: kib 
State-Changed-When: Tue Jan 18 16:21:32 UTC 2011 
State-Changed-Why:  
User home directory is owned by user, right ? 
The system works as intended, read about unix file permission model. 

http://www.freebsd.org/cgi/query-pr.cgi?pr=154112 

From: Ihor R <kaba@goodnet.com.ua>
To: <bug-followup@FreeBSD.org>, <kaba@goodnet.com.ua>
Cc:  
Subject: Re: amd64/154112: user can delete file witch owned by root:wheel
Date: Tue, 18 Jan 2011 21:27:23 +0200

  On Tue, 18 Jan 2011 16:22:53 GMT, kib@FreeBSD.org wrote:
 > User home directory is owned by user, right ?
 > The system works as intended, read about unix file permission model.
 
  The home user directory is owned by user, but I quote don't understand 
  how I can provide hosting service for my users, if anybody user can 
  delete any files in his home directory. By example:
 
  if I want to block some resources, like site, by adding "deny from all" 
  to .htaccess and replace owner of this file to root:wheel. User can not 
  change this file (rewrite) but he can delete this file any time he wish 
  - and the site will go on to work and can make some steps to damage 
  server.
 
  Can you please explain me how can I get back to Unix where users can't 
  delete file which they not own. What steps I need to do to solve current 
  problem.
  I need that users can't change or delete files, that users not own, 
  anyway it's (files) placed.
 
 
>Unformatted:
