From:             bill dot mcclendon at digiconllc dot com
Operating system: Linux RH
PHP version:      5.2.11
PHP Bug Type:     Unknown/Other Function
Bug description:  shell_exec using ls /home fails with Permission denied

Description:
------------
Running Apache 2.x and PHP 5.2

safe_mode = off

test case - using "<?php $cmd = 'ls /home'; shell_exec($cmd); ?>" produces
the error "ls: /home Permission denied"
using "<?php $cmd = 'ls /usr'; shell_exec($cmd); ?>" succeeds

(check the Apache error_log for errors)

However, both "/home" and "/usr" have the EXACT same permission and
ownership.

and Apache is running with "User owner" where "owner" is the owner of the
contents of "/home".  

Listing of both paths:

  8 drwxr-xr-x   15 root   root    4096 Jun 24  2005 usr
  8 drwxr-xr-x    5 root   root    4096 Jan  8  2007 home

Shell is "/bin/bash" and it looks like:

764 -rwxr-xr-x  1 root root 772760 Dec  6  2004 /bin/bash


Any ideas?

Reproduce code:
---------------
Test cases:
FAIL:

<?php
$cmd = 'ls /home';
echo "<pre>".shell_exec($cmd)."</pre>";
?>

SUCCESS:
<?php
$cmd = 'ls /usr';
echo "<pre>".shell_exec($cmd)."</pre>";
?>

Expected result:
----------------
Listing of files:

SUCCESS result:

bin
etc
games
include
kerberos
lib
lib64
libexec
local
sbin
share
src
tmp
X11R6


Actual result:
--------------
For FAIL above (no results).

-- 
Edit bug report at http://bugs.php.net/?id=49827&edit=1
-- 
Try a snapshot (PHP 5.2):            
http://bugs.php.net/fix.php?id=49827&r=trysnapshot52
Try a snapshot (PHP 5.3):            
http://bugs.php.net/fix.php?id=49827&r=trysnapshot53
Try a snapshot (PHP 6.0):            
http://bugs.php.net/fix.php?id=49827&r=trysnapshot60
Fixed in SVN:                        
http://bugs.php.net/fix.php?id=49827&r=fixed
Fixed in SVN and need be documented: 
http://bugs.php.net/fix.php?id=49827&r=needdocs
Fixed in release:                    
http://bugs.php.net/fix.php?id=49827&r=alreadyfixed
Need backtrace:                      
http://bugs.php.net/fix.php?id=49827&r=needtrace
Need Reproduce Script:               
http://bugs.php.net/fix.php?id=49827&r=needscript
Try newer version:                   
http://bugs.php.net/fix.php?id=49827&r=oldversion
Not developer issue:                 
http://bugs.php.net/fix.php?id=49827&r=support
Expected behavior:                   
http://bugs.php.net/fix.php?id=49827&r=notwrong
Not enough info:                     
http://bugs.php.net/fix.php?id=49827&r=notenoughinfo
Submitted twice:                     
http://bugs.php.net/fix.php?id=49827&r=submittedtwice
register_globals:                    
http://bugs.php.net/fix.php?id=49827&r=globals
PHP 4 support discontinued:          http://bugs.php.net/fix.php?id=49827&r=php4
Daylight Savings:                    http://bugs.php.net/fix.php?id=49827&r=dst
IIS Stability:                       
http://bugs.php.net/fix.php?id=49827&r=isapi
Install GNU Sed:                     
http://bugs.php.net/fix.php?id=49827&r=gnused
Floating point limitations:          
http://bugs.php.net/fix.php?id=49827&r=float
No Zend Extensions:                  
http://bugs.php.net/fix.php?id=49827&r=nozend
MySQL Configuration Error:           
http://bugs.php.net/fix.php?id=49827&r=mysqlcfg

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