Piwigo 2.4.6 - '/install.php' Arbitrary File Read/Delete

Piwigo 2.4.6 (install.php) Remote Arbitrary File Read/Delete Vulnerability


Vendor: Piwigo project
Product web page: http://www.piwigo.org
Affected version: 2.4.6

Summary: Piwigo is a photo gallery software for the web that comes
with powerful features to publish and manage your collection of
pictures.

Desc: Input passed to the 'dl' parameter in 'install.php' script
is not properly sanitised before being used to get the contents of
a resource or delete files. This can be exploited to read and delete
arbitrary data from local resources with the permissions of the web
server via directory traversal attack.

====================================================================
/install.php:
-------------

113: if (!empty($_GET['dl']) && file_exists(PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl']))
114: {
115:   $filename = PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl'];
116:   header('Cache-Control: no-cache, must-revalidate');
117:   header('Pragma: no-cache');
118:   header('Content-Disposition: attachment; filename="database.inc.php"');
119:   header('Content-Transfer-Encoding: binary');
120:   header('Content-Length: '.filesize($filename));
121:   echo file_get_contents($filename);
122:   unlink($filename);
123:   exit();
124: }

====================================================================


Tested on: Microsoft Windows 7 Ultimate SP1 (EN)
           Apache 2.4.2 (Win32)
           PHP 5.4.4
           MySQL 5.5.25a


Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
                            @zeroscience


Advisory ID: ZSL-2013-5127
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php

Vendor Patch: http://piwigo.org/bugs/view.php?id=2843



15.02.2013


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http://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt