PHP Safe Mode Local Stays On, But Global Off
Jul 25, 2009
I've recently upgraded from Shared hosting to a VPS. I'm currently getting my new VPS setup before migrating my site over. On my shared server, both the global and local safe_mode directives were reported as off by php_infO(). On ym new server, the global is reported as off, but local is reported as on.
On my old server, the PHP was version 4.4.9 running as a CGI. On my new server, PHP 5.1.6 is running as an Apache 2.0 Handler.
I have already set safe_mode to off in my global php.ini file (hence why global is reported by off). However, I have no local php.ini files, htaccess files, or php directive settings in place, so I cannot figure out why local is set to on!
I've tried editing httpd.conf to include "php_admin_flag safe_mode Off", though I'm not certain I put it in the right place. There is only one website on this server.
With the CGI php on my old server, I was able to create a local php.ini file to overwrite global directives, but that seems to have no effect with the Apache Handler on my new server.
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Nov 6, 2009
What is the best option in the php setting does keeping the php function safe mode on or off?
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Apr 9, 2009
i need to enable php safe mode on for my joomla and i came across this
Quote:
When the php safe mode is turned off globally by default at our server end, you can still override the setting to turn it ON for only your domain by just insert the following line inside the ".htaccess" file (at Linux server):
Code:
php_value safe_mode "1"
my joomla .htaccess file:
Quote:
##
# @version $Id: htaccess.txt 10492 2008-07-02 06:38:28Z ircmaxell $
# @package Joomla
# @copyright Copyright (C) 2005 - 2008 Open Source Matters. All rights reserved.
# @license http://www.gnu.org/copyleft/gpl.html GNU/GPL
# Joomla! is Free Software
##
#####################################################
# READ THIS COMPLETELY IF YOU CHOOSE TO USE THIS FILE
#
# The line just below this section: 'Options +FollowSymLinks' may cause problems
# with some server configurations. It is required for use of mod_rewrite, but may already
# be set by your server administrator in a way that dissallows changing it in
# your .htaccess file. If using it causes your server to error out, comment it out (add # to
# beginning of line), reload your site in your browser and test your sef url's. If they work,
# it has been set by your server administrator and you do not need it set here.
#
#####################################################
## Can be commented out if causes errors, see notes above.
Options +FollowSymLinks
#
# mod_rewrite in use
RewriteEngine On
########## Begin - Rewrite rules to block out some common exploits
## If you experience problems on your site block out the operations listed below
## This attempts to block the most common type of exploit `attempts` to Joomla!
#
# Block out any script trying to set a mosConfig value through the URL
RewriteCond %{QUERY_STRING} mosConfig_[a-zA-Z_]{1,21}(=|\%3D) [OR]
# Block out any script trying to base64_encode crap to send via URL
RewriteCond %{QUERY_STRING} base64_encode.*(.*) [OR]
# Block out any script that includes a <script> tag in URL
RewriteCond %{QUERY_STRING} (<|%3C).*script.*(>|%3E) [NC,OR]
# Block out any script trying to set a PHP GLOBALS variable via URL
RewriteCond %{QUERY_STRING} GLOBALS(=|[|\%[0-9A-Z]{0,2}) [OR]
# Block out any script trying to modify a _REQUEST variable via URL
RewriteCond %{QUERY_STRING} _REQUEST(=|[|\%[0-9A-Z]{0,2})
# Send all blocked request to homepage with 403 Forbidden error!
RewriteRule ^(.*)$ index.php [F,L]
#
########## End - Rewrite rules to block out some common exploits
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Aug 30, 2008
I have a script that needs safe mode off to run, the script writers have said safe mode is disabled as default and not required and even disabled in php 6
Now I'm not to fimular with Safe mode, all I know is most scripts are wrote to work with this on
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Jun 3, 2008
Should i switch safe mode on or off . Right now i am using it as on some one told me if i switch it off then server can easily hack but becoz i switch it on im having too much problem specially users of sites having problem of uploading and wordpress also have issue and some more script what you say what should i do?
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May 13, 2007
how can i make "safe mode on/off" using .htaccess?( in SharedHosting )
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Nov 27, 2007
I would like to know as to whether or not you have php safe mode turned on? If you do, please specify why, and would you allow your clients to turn it off?
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Sep 17, 2007
I searched but couldn't find much - should you run PHP with safe mode on or off on a shared (Linux) server?
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Aug 2, 2008
i have a cpanel server.. can any one tell me how to allow safe mode to a specific domain?
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Jan 18, 2008
I am going to run a free host, yes I know I should post this in FWHT but well, they dont answer very fast if at all.
It is very dangerous to have Safe Mode OFF on a free host, but someone was telling me about open_basedir, which makes it so they cant touch any files set outside of open_basedir. Would this be suffiecient to keep them from touching others files? I know I need to disable other functions like exec() and stuff but would open_basedir keep hackers away from others files and hacking them...
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Aug 11, 2008
To Install www.awbs.com scripts to my server
How Can I Do This Following to one site on My server
safe_mode Off
allow_url_fopen On
session.auto_start Off
tell Me that i can do that from httpd config
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Oct 2, 2007
I have found on one webhost that they have very cool feature:
Here is what they say:
Quote:
Browsing through any webhost related forum will reveal that giving safe mode off poses extreme security risk to the server. Because it offers hackers a great advantage to access any other members account or read their sensitive files which usually contain passwords.
But then some genuine scripts won't work with safe mode ON. Meaning you could turn it on per member requests but that takes lots of labor.
So we completely reprogrammed the safe mode PHP source code and recompiled it. As a result ours safe mode OFF is light-years safer & hacker-proof then standard PHP v5 safe mode ON.
So all our members are getting safe mode OFF, with harder security then those hosts who offer Safe Mode ON.
So now I am wondering, how they did that? I have searched forums and Google for lots of different keyword but haven't found anything.
I believe a lot of you running Apache as nobody and having php save mode OFF. It there any way you protect yourself? phpsuexec is not a solution now as it increasing load.
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Jan 31, 2007
i have vps and i enable the safe_mode , but now i need to turn it off becouse i need to install image uploader script and this script need safe mode off to work
so,
what can i do to secure my server while i turn off my safe mode?
what can happend if i turn off safe mode?
what is the job of safe mode?
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Jun 11, 2007
what are the most important issues for secure php.ini file like when you turn your SAFE_MODE ON or OFF?
or please who every read this topic to post his important disable_functions in php.ini ... and if some functions disable to post it ...
let's make this subject for the most important issues for secure your php.ini
from script-kids as we can ...
here i have some important question's for anyone has or controlling a server ; vps ....
#0x01 ; what the most important disable_functions for the php.ini?
#0x02 ; is the safe_mode should be enabled? or disable? and this depend on what exacly?
#0x03 ; what the functions or any trick to control the nobody ( attacker on the server or shell ) FROOZ .... didn't move ? or make any command in the server ...
#0x04 ; i saw in some secure server ( as they say ) they changed the Server : discribe to them name[s] like
Server : SECURE BY US .COM OR SECURE SERVER ..
uname -a : Linux secure.secure.com 2.6.9-023stab040.1 #1 Mon Jan 15 23:24:32 MSK 2007 i686 athlon i386 GNU/Linux
sysctl : linux 2.6.9-023stab040.1
Server : SECURE BY US ! < [THIS WHAT I MEAN HOW COULD WE CHANGE IT IN PHP.ini ?]
id : uid=99(nobody) gid=99(nobody) groups=99(nobody) <[how can we cannot make this nobody to have the host id ! everyhost in the server should have his own name and php.ini ?]
pwd : /home/host/public_html/
#0x05 ; how can we hide the uname -a on the shell [ the attacker upload it to our customer site !]
#0x06 ; how can we hide the sysctl to view to anyone like [ attacker ] ...
#0x07 ; how can we rewrite on he Server Type the display for our secure message?Server : SECURE BY US !
#0x08 ; how can we give evey site and customer his php.ini file in his public_html? and how can we give him [ JUST HIS PERMISSION TO HIS SITES FOLDER AND NOT OTHER PATHS AND PERMISSION!]
these question every one had a server ; vps , need to know and secure his box from other ...
and anyone would like to publish any new [secure or not] idea please let us know what you would like to say ....
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Mar 8, 2008
I decided to apply PHP safe mode to my servers, considering:
- I cannot prohibit using exec functions (some binary uses are needed, like host, mysqldump, etc..)
- I cannot restrict at all via UID/GID method at bins due to several problems..
Safe mode is the final sollution, as I only need "safe_mode_exec_dir" config to set a folder with the necesary binaries... this will stop nobody user (Apache) to exec whatever it wants, like perl, binaries uploaded to an public insecure folder (exploits), or anything else... people only could exec() the binaries I want and where I want. This will stop finally 95% of my hack problems.
Well. The problem is safe_mode is enabled or not, but you cannot set o disable certain features of this safe mode, like UID/GID checks (*******!)...
I am trying to configure so only "safe_mode_exec_dir" would apply, so:
- Including UIDs checks disabled by:
safe_mode_include_dir = "/home/"
(tested)
- Some variables set to NULL, as safe_mode_allowed_env_vars or safe_mode_protected_env_vars...
- safe_mode_exec_dir = "/usr/phpbin/"
Great! with symbolic lynks in... the best sollution available for me.
- open_basedir = "/home/"
(for fopen, etc...)
Ok ok.. but problems there.. by example this one:
Quote:
Warning: fopen() [function.fopen]: SAFE MODE Restriction in effect. The script whose uid is 32015 is not allowed to access cache/dynamic_fields/modules.php owned by uid 99 in /home/yyyyyyyyy/public_html/chn/modules/DynamicFields/DynamicField.php on line 823
Great.. fopen is under UID/GID checks, but it is not an include, so safe_mode_include_dir would not apply...
Now fopen, link, unlink, etc.. functions are UID restricted and this seems to be impossible to disable.... pffffffff...
can you share your safe_mode configs or sollutions for this problem?
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Nov 7, 2007
I am trying to assist a customer install a Dolphin CMS but it returns some "open_basedir restriction in effect" on /usr/local/bin/php (it needs the path to the PHP binary).
If I put /usr/local/bin/php in httpd.conf -> php_admin_value open_basedir "..." it seems to work and it finds the required binary but...is this safe?
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Jun 25, 2007
My system is Cento 4.4, no control panel. I just installed webmin, I found it was not working due to less Authen:: PAM, so I uninstalled webmin. However, I found snet-sensor-mgmt always stays says port 10000. I googled and got snet-sensor-mgmt comes from webmin. I guess it was left from my first time installation. I want to know how I may remove snet-sensor-mgmt?
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Jan 2, 2009
i have both PHP(php4 & php5) together
PHP4.........CSO (defoult)
PHP5.........CGI
i have already transfered a site from another server to my server !
this website using PHP5 and they asked me to enable register_global
but i don`t know how to active register_global when PHP5 set as CGI
value will not be accepted when PHP5 set as CGI : php_flag register_globals 1
* i think the last server used Suphp ( i found some files like : php.ini in FTP)
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Nov 14, 2008
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Does anyone have an Global Crossing contact?
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Oct 30, 2009
my server there it one site
but this site His alexa ranking of 7.000
i need Apache Global Configuration
StartServers = ?
and this
MinSpareServers = ?
and this
MaxSpareServers = ?
and this
MaxClients = ?
and this
MaxRequestsPerChild = ?
browsing heavily on the site, which lead to stoppage of the Apache
Server Information
Intel Core 2 Quad Q9550 2.83GHz
8GB Ram
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Jun 20, 2009
I have just saw on leaseweb noc site that there has been a public release of a Apache DoS tool and all All versions of Apache are vulnerable.
So can anyone confirm this and give some possible solution or advices? ....
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Feb 19, 2008
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