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qdblog-lfisql.txt

qdblog-lfisql.txt
Posted Apr 17, 2007
Authored by Omnipresent

QDBlog version 0.4 suffers from SQL injection and local file inclusion vulnerabilities.

tags | exploit, local, vulnerability, sql injection, file inclusion
SHA-256 | c78dc88b3206d4fb988353cddbcd15c9adece4747b1dd715bacb1798924847b7

qdblog-lfisql.txt

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._ | _. .|_ _. _.;_/
[_)|(_]\_|[ )(_](_.| \.net
| ._|
"QDBlog v0.4 - MULTIPLE VULNERABILITIES"
by Omni

1) Infos
---------
Date : 2007-04-12
Product : QDBlog
Version : v0.4 - Prior version maybe also be affected
Vendor : http://sourceforge.net/projects/qdblog/
Vendor Status : 2007-04-12 -> Not Informed!

Description : QDBlog is an open-source, simple, minimalistic blogging solution. It makes use of PHP and MySQL. It is
tiny (goal size is <50kb), and flexible. It designed to be based around choice. However it is
more targeted toward the adept user/web master.

Source : omnipresent - omni
E-mail : omnipresent[at]email[dot]it - omni[at]playhack[dot]net
Team : Playhack.net Security

2) Security Issues
-------------------

--- [ SQL Injection - Admin Access Bypass ] ---
===============================================

[ authenticate.php Script - Line 7 - 9 ]

$sql = "SELECT permissions, username FROM $prefix"."auth WHERE username = '" . $_POST['username'] . "' AND password =
MD5('".$_POST['wordpass']."');";

$query = mysql_query($sql, $conn);

[ end script aithenticate.php ]

As we can see the variables passed with POST method from login.php to authenticate.php (username and password) are not
properly sanitized before being used, so an attacker can inject SQL code and gain access to the administration pannel.

--- [ PoC ] ---
===============

Put in the username field (in login.php) a code like 1' OR '1' = '1' # and in the password filed what you want.
Click.. login and.. have fun :D

--- [ Local File Inclusion ] ---
================================

There are some security problem, concerning Local File Inclusion, in lots of files of this PHP Blog; for example in
index.php as shown below:

[ categories.php script - Line 2 ]

include("themes/$theme/cat_top.php");

[ end index.php script ]

$theme is not properly sanitized before being used so an attacker can include other files for eg /etc/passwd.

--- [ PoC ] ---
===============

http://remote_host/qdblog/categories.php?theme=../../../../../../../etc/passwd%00


Take again a look to categories.php:

in this file there is "an other vulnerability", File Traversal:

Line 3 : $file1 = fopen("themes/$theme/cat_mid.html", "r");



---- [ Patch ] ----

Edit the source code to ensure that the input is validated.
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