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Sec Bug #63447 max_input_vars doesn't filter variables when mbstring.encoding_translation = On
Submitted: 2012-11-06 09:00 UTC Modified: 2015-10-11 11:52 UTC
From: na24am at gmail dot com Assigned: laruence (profile)
Status: Closed Package: Variables related
PHP Version: 5.4.8 OS: MacOS X Lion
Private report: No CVE-ID: None
View Developer Edit
 [2012-11-06 09:00 UTC] na24am at gmail dot com 
Description:
------------
max_input_vars doesn't filter variables when mbstring.encoding_translation = On

--

mbstring.encoding_translation = On
max_input_vars = 2

Test script:
---------------
<html>
<body>
<form action="" method="post">
<input type="hidden" name="value01" value="test01">
<input type="hidden" name="value02" value="test02">
<input type="hidden" name="value03" value="test03">
<input type="hidden" name="value04" value="test04">
<input type="submit" value="submit">
</form>
<?php
var_dump($_POST);
?>
</body>
</html>

Expected result:
----------------
Warning: Unknown: Input variables exceeded 2. To increase the limit change 
max_input_vars in php.ini. in Unknown on line 0

array(2) { ["value01"]=> string(6) "test01" ["value02"]=> string(6) "test02" }

Actual result:
--------------
array(4) { ["value01"]=> string(6) "test01" ["value02"]=> string(6) "test02" 
["value03"]=> string(6) "test03" ["value04"]=> string(6) "test04" }

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AllCommentsChangesGit/SVN commitsRelated reports
 [2012-11-06 10:50 UTC] laruence@php.net
-Type: Bug +Type: Security -Private report: No +Private report: Yes
 [2012-11-07 09:13 UTC] laruence@php.net 
The fix for this bug has been committed.

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/.

 For Windows:

http://windows.php.net/snapshots/
 
Thank you for the report, and for helping us make PHP better.

fixed in : 
https://github.com/php/php-src/commit/7fcbe4d5467300a0acee78330a0cdc9d1cbf05ad
 [2012-11-07 09:13 UTC] laruence@php.net
-Status: Open +Status: Closed -Assigned To: +Assigned To: laruence
 
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