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DIY CMS v1.0 Poll - Multiple Web Vulnerabilities
- To: bugs@xxxxxxxxxxxxxxxxxxx, bugtraq@xxxxxxxxxxxxxxxxx
- Subject: DIY CMS v1.0 Poll - Multiple Web Vulnerabilities
- From: Research <research@xxxxxxxxxxxxxxxxxxxxx>
- Date: Thu, 26 Apr 2012 23:29:16 +0200
Title:
======
DIY CMS v1.0 Poll - Multiple Web Vulnerabilities
Date:
=====
2012-04-26
References:
===========
http://www.vulnerability-lab.com/get_content.php?id=518
VL-ID:
=====
518
Introduction:
=============
Do It Yourslef Content Management System is a feature-rich, php-built,
mysql-based, opensource and free CMS.
It is suitable to manage any kind of contents. It is modular, extensible and
easliy skinnable. Build your own modules for specific
purposes, add certain functionalites to suit your needs and design a theme that
represents the content of your website.
(Copy of the Vendor Homepage: http://diy-cms.com)
Abstract:
=========
A Vulnerability Laboratory researcher discovered multiple web vulnerabilities
in DIY v1.0 Content Management System.
Report-Timeline:
================
2012-04-16: Public or Non-Public Disclosure
Status:
========
Published
Exploitation-Technique:
=======================
Remote
Severity:
=========
High
Details:
========
1.1
A SQL Injection vulnerability is detected in DIY v1.0 Content Management
System.
The vulnerability allows an attacker (remote) or local low privileged user
account to inject/execute own sql commands
on the affected application dbms. Successful exploitation of the vulnerability
results in dbms & application compromise.
Vulnerable Module(s):
[+] Mod - Poll
1.2
Multiple non persistent cross site scripting vulnerability is detected in DIY
v1.0 Content Management System.
The vulnerability allows remote attackers to hijack website customer, moderator
or admin sessions with high required
user inter action or local low privileged user account. Successful exploitation
can result in account steal, phishing
& client-side content request manipulation.
Vulnerable Module(s):
[+] Poll - Question & Answer
Input/Output
1.3
A cross site request forgery vulnerability is detected in DIY v1.0 Content
Management System. The bugs allow remote
attackers with high required user inter action to edit user accounts.
Successful exploitation can lead to account access.
To exploit the issue the attacker need to create a manipulated copy the edit
user mask/form. Inside of the document the
remote can implement his own values for the update because of no form or token
protection. When admin get now forced to
execute the script via link he is executing the new value on the update of the
application if his session is not expired.
Vulnerable Module(s):
[+] &modfile=add
Proof of Concept:
=================
1.1
The sql injection vulnerabilities can be exploited by remote attackers without
user inter action.
Exploitation requires the possibility to allow an attacker to add or config a
poll.
For demonstration or reproduce ...
PoC:
diy-cms/mod.php?mod=poll&start=`[SQL-INJECTION]--
1.2
The cross site vulnerabilities can be exploited by remote attackers with medium
required user inter action.
For demonstration or reproduce ...
PoC:
diy-cms/modules/poll/add.php[Cross Site Scripting]
1.3
The cross site request forgery vulnerabilities can be exploited by remote
attackers with high required user inter action.
For demonstration or reproduce ...
<form action="http://127.0.0.1/diy/mod.php?mod=poll&modfile=add"; method="post"
name="add_poll" enctype="multipart/form-data">
<input type="hidden" name='polltype' value='1'>
<input type="hidden" name="question" value="<script>alert(1)</script>">
<input type="hidden" name="answer1" value="<script>alert(1)</script>">
<input type="hidden" name="answer2" value="<script>alert(1)</script>">
<input type="hidden" name='active' value='1' checked>
<input type=submit name='submit' value=XSS></td>
</form>
Solution:
=========
1.1
In file /diy-cms/modules/poll/index.php
line: 50 - 55
$ppp = $mod->setting(/`polls_per_page/`);
if(!isset($_GET[/`start/`]))
{$start = /`0/`;
}else{
$start = $_GET[/`start/`];
}
we edit to:
$ppp = $mod->setting(/`polls_per_page/`);
if(!isset($_GET[/`start/`]))
{$start = /`0/`;
}else{
$start = (int)$_GET[/`start/`];
}
1.2
In file /diy-cms/modules/poll/add.php
line: 53 - 84
if($submit)
{
extract($_POST);
$type = $_POST[/``polltype/``];
$question = $_POST[/``question/``];
$status = $_POST[/``active/``];
$date = time();
$arr_post_vars = array($type, $question);
if (!required_entries($arr_post_vars))
{
error_message($lang[/`LANG_ERROR_VALIDATE/`]);
}
if($status == /`1/`)
{
$result = $diy_db->query(/``update diy_poll_questions set
status=/`0/`/``);
}
$result = $diy_db->query(/``INSERT INTO diy_poll_questions VALUES
(/`/`,/`$question/`,/`$type/`,/`$status/`,/`$date/`)/``);
$qid = $diy_db->insertid();
we edit to:
if($submit)
{
extract($_POST);
$type = $_POST[/``polltype/``];
$question = $_POST[/``question/``];
$status = $_POST[/``active/``];
$date = time();
$arr_post_vars = array($type, $question);
if (!required_entries($arr_post_vars))
{
error_message($lang[/`LANG_ERROR_VALIDATE/`]);
}
if($status == /`1/`)
{
$result = $diy_db->query(/``update diy_poll_questions set
status=/`0/`/``);
}
$question = htmlspecialchars(strip_tags($question));
$result = $diy_db->query(/``INSERT INTO diy_poll_questions VALUES
(/`/`,/`$question/`,/`$type/`,/`$status/`,/`$date/`)/``);
$qid = $diy_db->insertid();
In file /diy-cms/modules/poll/edit.php
line: 69 - 76
$result = $diy_db->query(/``update diy_poll_questions set
question=/`$question/`, type=/`$type/`, status=/`$status/` where
qid=/`$qid/`/``);
foreach ($_POST[/`answer/`] as $answer)
{
$answer = $answer;
if (!empty($answer)) {
$diy_db->query(/``update diy_poll_answers set
answer=/`$answer/` where aid=/`$aid/` /``);
}
we edit to:
$question = htmlspecialchars(strip_tags($question));
$result = $diy_db->query(/``update diy_poll_questions set
question=/`$question/`, type=/`$type/`, status=/`$status/` where
qid=/`$qid/`/``);
foreach ($_POST[/`answer/`] as $answer)
{
$answer = htmlspecialchars(strip_tags($answer));
if (!empty($answer)) {
$diy_db->query(/``update diy_poll_answers set
answer=/`$answer/` where aid=/`$aid/` ``);
}
Risk:
=====
1.1
The security risk of the sql injection vulnerabilities are estimated as high(+).
1.2
The security risk of the persistent input validation vulnerability is estimated
as medium(-).
1.2
The security risk of the persistent input validation vulnerability is estimated
as low(+).
Credits:
========
Vulnerability Laboratory [Research Team] - snup (snup@xxxxxxxxxxxxxxxxxxxxx)
Disclaimer:
===========
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Copyright © 2012
Vulnerability-Lab
--
VULNERABILITY RESEARCH LABORATORY TEAM
Website: www.vulnerability-lab.com
Mail: research@xxxxxxxxxxxxxxxxxxxxx