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。

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。
# Q/ W+ n. Z' ]====================================================================
/install.php:
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2 i1 a1 {1 `% W1 P& d0 W113: 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_'.$_GET['dl'];
116:   header('Cache-Control: no-cache, must-revalidate');
3 Z! a' I6 M! A) A) X* J117:   header('Pragma: no-cache');
+ N1 L8 Q( d. x7 w  g/ a118:   header('Content-Disposition: attachment; filename="database.inc.php"');
119:   header('Content-Transfer-Encoding: binary');
" s! ?5 u$ L& b120:   header('Content-Length: '.filesize($filename));
0 r% |2 Q0 l' C. d6 C121:   echo file_get_contents($filename);
122:   unlink($filename);
: X, o, V3 n+ x* Z4 ~, O& o123:   exit();
124: }
====================================================================

Tested on: Microsoft Windows 7 Ultimate SP1 (EN)
           Apache 2.4.2 (Win32)
, `7 B( x* X* F2 r0 h# v  f6 R; A           PHP 5.4.4
           MySQL 5.5.25a

. k7 ?* a* Y# W) t$ c7 }1 fVulnerability discovered by Gjoko 'LiquidWorm' Krstic
& ^% J- R* S$ m( s; O: O, E                            @zeroscience

- r) J0 Y- g" Y& ZAdvisory 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
- J$ j- [, o% k$ {; {
; C+ n( |* b& p' B15.02.2013
# W; r, z) e5 _4 T; p2 ^6 {
--
http://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt
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