对VAuditDemo的一次审计

 1 <?php 
 2 require_once(‘sys/config.php‘);
 3 require_once(‘header.php‘);
 4 ?>
 5 <div class="row">
 6     <?php
 7     /* Include */
 8     if (isset($_GET[‘module‘])){
 9         include($_GET[‘module‘].‘.inc‘);
10     }else{
11     ?>
12     <div class="jumbotron" style="text-align: center;">
13         <h1><b>VAuditDemo</b></h1>
14         <p>一个简单的Web漏洞演练平台</p><br />
15     </div>
16     <div class="col-lg-12">
17         <h2>用於演示講解PHP基本漏洞</h2>
18         <p></p>
19     </div>
20     <?php
21     }
22     ?>
23 </div>
24         
25 <?php
26 require_once(‘footer.php‘);
27 ?>

1 if (isset($_GET[‘module‘])){
2          include($_GET[‘module‘].‘.inc‘);
3  }

 127.0.0.1/index.php?module=1.txt);#

include(1.txt);# . ‘.inc‘);

sys/config.php   header.php

 1 <?php
 2 
 3 error_reporting(0);
 4 
 5 if (!file_exists($_SERVER["DOCUMENT_ROOT"].‘/sys/install.lock‘)){
 6     header("Location: /install/install.php");
 7     exit;
 8 }
 9 
10 include_once($_SERVER["DOCUMENT_ROOT"].‘/sys/lib.php‘);
11 
12 $host="localhost"; 
13 $username="root"; 
14 $password="root"; 
15 $database="vauditdemo"; 
16 
17 $conn = mysql_connect($host,$username,$password);
18 mysql_query(‘set names utf8‘,$conn);
19 mysql_select_db($database, $conn) or die(mysql_error());
20 if (!$conn)
21 {
22     die(‘Could not connect: ‘ . mysql_error());
23     exit;
24 }
25 
26 session_start();
27 
28 ?>

 error_reporting(0);

方法：error_reporting(E_ALL);

 1 <?php
 2 
 3 date_default_timezone_set(‘UTC‘);   #首先先定义了时区
 4 
 5 if( !get_magic_quotes_gpc() ) {     #判断是是否开启了魔术引号转义，若果没有就调用自己定义的sec()去转义。
 6     $_GET = sec ( $_GET );
 7     $_POST = sec ( $_POST );
 8     $_COOKIE = sec ( $_COOKIE ); 
 9 }
10 $_SERVER = sec ( $_SERVER );        #所有调用server的全局数据进行sec()转义
11 
12 function sec( &$array ) {
13     if ( is_array( $array ) ) {      #用is_array()判断接受的$array是否为数组，如果是就循环遍历数组中的值，直到array中的值变成字符串或者数字
14         foreach ( $array as $k => $v ) {
15             $array [$k] = sec ( $v );
16         }
17     } else if ( is_string( $array ) ) {  #判断是否为字符串，如果是字符串就执行addslashes（）函数进行转义
18         $array = addslashes( $array );
19     } else if ( is_numeric( $array ) ) { #判断是否为数字,如果位数字就用intval转为整形。
20         $array = intval( $array );
21     }
22     return $array;
23 }
24 
25 function sqlwaf( $str ) {                #自己定义的waaf字符串替换函数，此处有可能去绕过！
26     $str = str_ireplace( "and", "sqlwaf", $str );
27     $str = str_ireplace( "or", "sqlwaf", $str );
28     $str = str_ireplace( "from", "sqlwaf", $str );
29     $str = str_ireplace( "execute", "sqlwaf", $str );
30     $str = str_ireplace( "update", "sqlwaf", $str );
31     $str = str_ireplace( "count", "sqlwaf", $str );
32     $str = str_ireplace( "chr", "sqlwaf", $str );
33     $str = str_ireplace( "mid", "sqlwaf", $str );
34     $str = str_ireplace( "char", "sqlwaf", $str );
35     $str = str_ireplace( "union", "sqlwaf", $str );
36     $str = str_ireplace( "select", "sqlwaf", $str );
37     $str = str_ireplace( "delete", "sqlwaf", $str );
38     $str = str_ireplace( "insert", "sqlwaf", $str );
39     $str = str_ireplace( "limit", "sqlwaf", $str );
40     $str = str_ireplace( "concat", "sqlwaf", $str );
41     $str = str_ireplace( "\\", "\\\\", $str );
42     $str = str_ireplace( "&&", "", $str );
43     $str = str_ireplace( "||", "", $str );
44     $str = str_ireplace( "‘", "", $str );
45     $str = str_ireplace( "%", "\%", $str );
46     $str = str_ireplace( "_", "\_", $str );
47     return $str;
48 }
49 
50 function get_client_ip(){
51     if ($_SERVER["HTTP_CLIENT_IP"] && strcasecmp($_SERVER["HTTP_CLIENT_IP"], "unknown")){
52         $ip = $_SERVER["HTTP_CLIENT_IP"];
53     }else if ($_SERVER["HTTP_X_FORWARDED_FOR"] && strcasecmp($_SERVER["HTTP_X_FORWARDED_FOR"], "unknown")){
54         $ip = $_SERVER["HTTP_X_FORWARDED_FOR"];
55     }else if ($_SERVER["REMOTE_ADDR"] && strcasecmp($_SERVER["REMOTE_ADDR"], "unknown")){
56         $ip = $_SERVER["REMOTE_ADDR"];
57     }else if (isset($_SERVER[‘REMOTE_ADDR‘]) && $_SERVER[‘REMOTE_ADDR‘] && strcasecmp($_SERVER[‘REMOTE_ADDR‘], "unknown")){
58         $ip = $_SERVER[‘REMOTE_ADDR‘];
59     }else{
60         $ip = "unknown";
61     }
62     return($ip);
63 }
64 
65 function clean_input( $dirty ) {
66     return mysql_real_escape_string( stripslashes( $dirty ) );
67 }
68 
69 function is_pic( $file_name ) {
70     $extend =explode( "." , $file_name );
71     $va=count( $extend )-1;
72     if ( $extend[$va]==‘jpg‘ || $extend[$va]==‘jpeg‘ || $extend[$va]==‘png‘ ) {
73         return 1;
74     }
75     else
76         return 0;
77 }
78 
79 function not_find( $page ) {
80     echo "<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 2.0//EN\"><html><head><title>404 Not Found</title></head><body><h1>Not Found</h1>
81         <p>The requested URL ".$page." was not found on this server.</p></body></html>";
82 }
83 ?>