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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, h5 s! [: c$ D* L( Q7 ?) y/install.php:
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113: if (!empty($_GET['dl']) && file_exists(PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl']))
; H( I* h- b$ o114: {
115:   $filename = PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl'];
116:   header('Cache-Control: no-cache, must-revalidate');
& i+ B1 C0 }7 ^! c! f) z9 E117:   header('Pragma: no-cache');
) }' P+ x' x, Z* F% P118:   header('Content-Disposition: attachment; filename="database.inc.php"');
119:   header('Content-Transfer-Encoding: binary');
120:   header('Content-Length: '.filesize($filename));
121:   echo file_get_contents($filename);
5 S$ U: F% \( I& E, l& A/ G/ N122:   unlink($filename);
123:   exit();
124: }
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! P( z  }3 B) w$ ^4 j) V4 ?( rTested on: Microsoft Windows 7 Ultimate SP1 (EN)
, }9 K1 Z& U* P3 E5 K3 p           Apache 2.4.2 (Win32)
           PHP 5.4.4
           MySQL 5.5.25a
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Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
+ D# F1 |4 y$ z7 z; n" E& Z                            @zeroscience
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Advisory ID: ZSL-2013-5127
' i, f* z! D# M6 v9 e  aAdvisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php
Vendor Patch: http://piwigo.org/bugs/view.php?id=2843

5 ], A1 N! i' ~7 G0 C& K15.02.2013

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