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。
2 M1 T' A( M/ y7 m: z" p/ x% v====================================================================
/install.php:
-------------
8 A& M5 \5 U9 e6 R& W# y5 W113: if (!empty($_GET['dl']) && file_exists(PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl']))
- I) \: I( ?) n/ Z& Y% j. P. e/ q7 A114: {
% M/ ?) s$ ~6 B, D  k8 _( r  I% E115:   $filename = PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl'];
1 R  i# k3 ?* D: R8 U116:   header('Cache-Control: no-cache, must-revalidate');
117:   header('Pragma: no-cache');
118:   header('Content-Disposition: attachment; filename="database.inc.php"');
119:   header('Content-Transfer-Encoding: binary');
120:   header('Content-Length: '.filesize($filename));
121:   echo file_get_contents($filename);
8 Y" x5 D3 S% e5 S$ C! g7 F0 f; x' X122:   unlink($filename);
0 P  P" t/ C+ \, l( M  |! H123:   exit();
124: }
====================================================================
* [1 I* J" |$ L' J. }' w
Tested on: Microsoft Windows 7 Ultimate SP1 (EN)
. v* b7 f% F, u5 S8 i+ \8 i           Apache 2.4.2 (Win32)
, h. B4 I. y* `% Q           PHP 5.4.4
           MySQL 5.5.25a

Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
: a- l/ r/ y& _  K. H! D- d, w% A& B" x2 K                            @zeroscience

2 @0 D" G( i: E! Q+ XAdvisory ID: ZSL-2013-5127
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php
1 F' D' d4 G$ L4 JVendor Patch: http://piwigo.org/bugs/view.php?id=2843
6 z! D/ u# j: q2 O% S. y
15.02.2013
: O9 p- G1 ^5 M  s9 E2 \; P
--
http://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt
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