The following snippet of code is supposed to change ownership and permissions, then move a quarantined file to the specified user's Maildir.
<?php
$path_quarantine = "/var/virusmails/" . $filename;
$path_inbox = "/home/" . $username . "/Maildir/new/";
chmod($path_quarantine, 0777);
chown($path_quarantine, $username);
copy($path_quarantine, $path_inbox);
?>
($filename and $username are variables input from a webform.)
Instead, I get the following warnings and nothing happens:
Warning: chmod(): Operation not permitted in /var/www/html/virusmails/p
Warning: chown(): Operation not permitted in /var/www/html/virusmails/p
Warning: copy(/var/virusmails/virus
Is this a security feature that I have to overcome because I'm trying to manipulate filesystem files? In my php.ini I have safe_mode = Off which seems like it would lower the defenses enough to allow chown/chmod to be executed.
More info:
The file being moved is originally owned by user daemon. The php script is in a file named process.php owned by apache. I tried chown apache.apache filename since the httpd daemon runs as user apache, but that didn't work either.
Redhat Fedora FC1
PHP-4.3.8
Apache 2.0.50
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Ok, I tried a test by creating /tmp/viruses and chown'ing it to apache.apache. I was able to execute chmod via the php script, but chown and copy still do not work.
The target folder is chown $username.apache and I've set my php.ini safe_mode_gid = On. Now apache owns the file and the target path is group writable by apache but I still cannot copy.
Shouldn't that be enough to change ownership and move the file? If the owner of the file can't chown a file to a different owner then what's the use of chown in php? That's a rhetorical question.
Source:
root# ll -a /tmp/viruses/
drwxr-xr-x 2 apache apache 4096 Feb 15 15:10 .
drwxrwxrwt 4 root root 4096 Feb 16 09:01 ..
-rwxrwxrwx 1 apache apache 1179508 Feb 15 15:10 banned-Zss2klTyavKX
Destination:
root# ll -a /home/test/Maildir/new
drwxrwx--- 2 test apache 323584 Feb 16 08:44 .
drwx------ 21 test test 4096 Dec 1 09:53 ..
Business Accounts
Answer for Membership
by: dereshPosted on 2007-02-15 at 23:58:25ID: 18546772
you need to have read/write permisions for user that runs apache on /var/virusmail/* and on /home/*/Maildir/new to be able to chhange permisions on /var/virusmail/* file and to write to /home/*/Maildir/new/ folder
but be aware that then all users running as apache user (all php on server) will have access to those files.