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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' o  e" R  [1 e/ RPiwigo 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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# v) i' Q. N& {$ c! Q$ {/install.php:
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4 [! Q( c, @& X* {0 H' x113: if (!empty($_GET['dl']) && file_exists(PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl']))
1 ^# L/ F) {6 P114: {
115:   $filename = PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl'];
116:   header('Cache-Control: no-cache, must-revalidate');
117:   header('Pragma: no-cache');
! R0 d. C* R/ ]118:   header('Content-Disposition: attachment; filename="database.inc.php"');
119:   header('Content-Transfer-Encoding: binary');
4 ~- Y, s% g6 ]# I3 i120:   header('Content-Length: '.filesize($filename));
) Y! a0 ~& l  f) \: v121:   echo file_get_contents($filename);
122:   unlink($filename);
123:   exit();
. w1 ?' ^  [; \. ?) F124: }
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& u& U& C! y& e" H  l' `Tested on: Microsoft Windows 7 Ultimate SP1 (EN)
4 Y7 q' X9 A; I6 z8 O. L           Apache 2.4.2 (Win32)
           PHP 5.4.4
; |! m/ t+ r' q; x% A8 `           MySQL 5.5.25a

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
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5 u1 r2 w0 L. U5 A15.02.2013
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1 `% S: r9 X* @. zhttp://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt