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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* a1 e6 K& n- ^Piwigo 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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3 m0 S3 r; U  [, Z- e" ~0 u9 I  c/install.php:
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- ~3 V* H& T% N; o3 @113: if (!empty($_GET['dl']) && file_exists(PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl']))
: _3 ]0 f9 o, a* e8 ]114: {
) w1 m. E% V! K115:   $filename = PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl'];
116:   header('Cache-Control: no-cache, must-revalidate');
117:   header('Pragma: no-cache');
118:   header('Content-Disposition: attachment; filename="database.inc.php"');
3 t$ n5 Y5 H! ^119:   header('Content-Transfer-Encoding: binary');
120:   header('Content-Length: '.filesize($filename));
121:   echo file_get_contents($filename);
122:   unlink($filename);
123:   exit();
6 F: `5 r/ A5 o) B1 Q, d7 M+ x! M124: }
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! `0 N( j/ N4 ?, U7 [" O4 \
5 E: A8 [2 Z' Y+ ~* [Tested on: Microsoft Windows 7 Ultimate SP1 (EN)
# _$ r8 a, R3 X1 Q, \( O" f: d6 n7 h           Apache 2.4.2 (Win32)
* x1 k- E2 _# \           PHP 5.4.4
2 o% v8 X/ s: N$ W  E; {           MySQL 5.5.25a
# v" \3 o0 N- N, E, R: m
Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
- Q: H1 k5 h* ^# ^3 p  @                            @zeroscience

Advisory 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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% h4 Y0 g3 T- s4 H4 d" _: `( r0 D( g15.02.2013

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

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