#28632 [Opn->Csd]: LOAD DATA LOCAL security hole problem is stil not solved
ID: 28632
Updated by: iliaa@php.net
Reported By: unknown at masterhost dot ru
-Status: Open
+Status: Closed
Bug Type: MySQL related
Operating System: FreeBSD
PHP Version: 4.3.5RC2?-4.3.7
New Comment:
This bug has been fixed in CVS.
Snapshots of the sources are packaged every three hours; this change
will be in the next snapshot. You can grab the snapshot at
http://snaps.php.net/.
Thank you for the report, and for helping us make PHP better.
Previous Comments:
------------------------------------------------------------------------
[2004-06-04 16:37:39] unknown at masterhost dot ru
The problem presents with older versions too. I have checked it with
4.3.5RC2 and 4.3.7 on FreeBSD 4.9, but it seems other versions after
May 2003 are vulnerable, and it's OS-independent.
------------------------------------------------------------------------
[2004-06-04 16:22:25] unknown at masterhost dot ru
Description:
------------
The file accesses with 'LOAD DATA LOCAL INFILE' are made by mysql
client library, so you can access any file which webserver process can
access to, IGNORING open_basedir option!
This problem has been reported about year ago (Bug #23779 LOAD DATA
LOCAL isn't respecting open_basedir), and you tried to resolve it:
http://cvs.php.net/diff.php/php-src/ext/mysql/php_mysql.c?r1=1.174.2.13&r2=1.174.2.14&ty=h
/* disable local infile option for open_basedir */
if (strlen(PG(open_basedir))) {
client_flags ^= CLIENT_LOCAL_FILES;
}
You have used XOR, so if user specified options '128' as fifth
parameter for mysql_connect() with enabled open_basedir restrictions,
it should disable LOAD DATA LOCAL. But with '0' options given it
enables LOAD DATA LOCAL, so we have it enabled by default!
It seems it should be not just a XOR, may be
client_flags &= (32767^CLIENT_LOCAL_FILES);
or something like this.
Reproduce code:
---------------
<?php
$link = mysql_connect('host', 'user', 'password', false, 0);
$db_selected = mysql_select_db('database', $link);
$result = mysql_query("LOAD DATA LOCAL INFILE 'datafile.txt' INTO TABLE
test");
if (!$result) {
die('Invalid query: ' . mysql_error());
}
mysql_close($link);
?>
Expected result:
----------------
There shoule be an error:
Invalid query: The used command is not allowed with this MySQL version
But there isn't, query is successful...
Actual result:
--------------
Data from file is inserted to 'test' table.
------------------------------------------------------------------------
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Thread (10 messages)